SPIRAL MESH CHAIN CONVEYOR

Abstract

The provided is a spiral mesh chain conveyor, including a rotary drum and mesh chains, where the mesh chains enter a periphery of the rotary drum along a tangential direction and extend along a spiral line in a winding manner; a plurality of rotary drum upright posts and a plurality of driving vertical rods are uniformly arranged along a circumference of the rotary drum; an inner side of each link of the mesh chain close to the rotary drum is provided with a mesh chain guiding head; a guide member is sleeved on an outer wall of an inlet end of the rotary drum upright post; and a stroke increasing segment and a leading-in segment are sequentially provided on an outer wall of the guide member along a contact order of the mesh chain guiding head.

Claims

1. A spiral mesh chain conveyor, comprising a rotary drum and mesh chains, wherein the mesh chains enter a periphery of the rotary drum along a linear segment and extend along a spiral line in a winding manner; a plurality of driving vertical rods are uniformly arranged at the periphery of the rotary drum; an inner side of each link of the mesh chain adjacent to the rotary drum is provided with a mesh chain guiding head engaged with the driving vertical rod; an inlet end of the driving vertical rod is provided with a guide member; a stroke increasing segment and a leading-in segment are sequentially provided on an outer wall of the guide member along a contact order of the mesh chain guiding head; a tail end of the leading-in segment inclines to an outer wall of the rotary drum; the guide member is provided with a strip ridge along an outer wall of the stroke increasing segment and an outer wall of the leading-in segment; a tail end of the strip ridge is docked with the inlet end of the driving vertical rod; and when the front mesh chain guiding head is engaged with the strip ridge, the rear mesh chain guiding head is limited on the outer wall of the rotary drum and bears a tensile force of the linear segment at a rear of the rear mesh chain guiding head.

2. The spiral mesh chain conveyor according to claim 1, wherein a plurality of vertical grooves for allowing the mesh chain guiding head to be embedded into are formed in an outer wall of an inlet end of the guide member along a width direction.

3. The spiral mesh chain conveyor according to claim 2, wherein a tail end of the vertical groove and an inlet end of the strip ridge are spaced apart by a distance or flush with each other, or the tail end of the vertical groove extends into the outer wall of the stroke increasing segment.

4. The spiral mesh chain conveyor according to claim 2, wherein the inlet end of the guide member is further provided with a columnar segment; and the vertical groove is located on an outer wall of the columnar segment.

5. The spiral mesh chain conveyor according to claim 4, wherein an inlet oblique segment is provided between the columnar segment and the stroke increasing segment; and an inlet end of the strip ridge extends to a slope of the inlet oblique segment and intersects with the slope of the inlet oblique segment.

6. The spiral mesh chain conveyor according to claim 4, wherein the stroke increasing segment and the leading-in segment are located on an identical oblique surface or on two oblique surfaces having different inclinations; and a length direction of the strip ridge is parallel to an oblique surface where the strip ridge is located or parallel to a bottom edge of the guide member.

7. The spiral mesh chain conveyor according to claim 1, wherein the strip ridge has a circular cross section; a bottom of the circular cross section is connected to the guide member integrally; and a concave arc of an engaging surface of the mesh chain guiding head is hooked to a convex arc of a side of the strip ridge.

8. The spiral mesh chain conveyor according to claim 1, wherein a ridge overhead hook is provided on a sidewall of the strip ridge; a mesh chain overhead hook is provided on a sidewall of the mesh chain guiding head; and the mesh chain overhead hook and the ridge overhead hook are embedded into each other.

9. The spiral mesh chain conveyor according to claim 1, wherein a cross section of the strip ridge is a square or a T shape being wide outside and narrow inside.

10. The spiral mesh chain conveyor according to claim 1, wherein at least one, ridge buckling groove is formed in a sidewall of the strip ridge; at least one, mesh chain buckling groove is formed in a sidewall of the mesh chain guiding head; and the ridge buckling groove and the mesh chain buckling groove are embedded into each other.

11. The spiral mesh chain conveyor according to claim 10, wherein the ridge buckling groove or the mesh chain buckling groove is a rectangle, a triangle, a trapezoid, or a semicircle.

12. The spiral mesh chain conveyor according to claim 1, wherein the strip ridge extends to a middle of the stroke increasing segment from the leading-in segment; a plurality of vertical grooves for allowing the mesh chain guiding head to be embedded into are formed in an outer wall of an inlet end of the guide member along a width direction; and the vertical groove extends to an inlet end of the strip ridge or exceeds the inlet end of the strip ridge.

13. The spiral mesh chain conveyor according to claim 12, wherein when the mesh chain is overloaded, the mesh chain guiding head is popped out from the original engaged vertical groove and slides into the downstream vertical groove.

14. The spiral mesh chain conveyor according to claim 1, wherein a top of the strip ridge is convex arc-shaped; an inclined ridge chamfer is provided at an inlet end of the strip ridge; and a surface of the inclined ridge chamfer contacting the mesh chain guiding head is arc-shaped.

15. The spiral mesh chain conveyor according to claim 1, wherein a mesh chain chamfer is provided on a mesh chain engaging tooth adjacent to the mesh chain guiding head.

16. The spiral mesh chain conveyor according to claim 1, wherein limit members are uniformly arranged on a circumference of an inlet end of the rotary drum; a plurality of vertical grooves for allowing the mesh chain guiding head to be embedded into are formed in an outer wall of the limit member along a width direction; and the limit member and the guide member are arranged alternately at the periphery of the rotary drum.

17. The spiral mesh chain conveyor according to claim 2, wherein the vertical groove is a concave arc-shaped groove, a V-shaped groove, a trapezoidal groove, or a square groove.

18. The spiral mesh chain conveyor according to claim 1, wherein the inner side of each link of the mesh chain is provided with a link driving end extending to the outer wall of the rotary drum; the mesh chain guiding head is located at a head of the link driving end; a heightening ridge connected to the strip ridge integrally is provided at a top of the strip ridge; and when the strip ridge is engaged with the mesh chain guiding head, the heightening ridge on the strip ridge is further engaged with the corresponding link driving end.

19. The spiral mesh chain conveyor according to claim 1, wherein there is an arc length difference L between an arc length of a spiral line wound by an inner side of the mesh chain on the stroke increasing segment and the leading-in segment, and an arc length of a spiral line wound by the inner side of the mesh chain along the driving vertical rod at an identical phase angle; a distance between an engaging surface of the mesh chain guiding bead at an inlet of the stroke increasing segment and an engaging surface of the driving vertical rod in a circumferential direction of the rotary drum is defined as an engagement clearance D1; after engaged with the mesh chain guiding head, the driving vertical rod drives the inner side of the mesh chain to advance a distance to overcome a loosened clearance D2, an outer side of the mesh chain is driven to advance; and the arc length difference Lthe engagement clearance D1+the loosened clearance D2.

20. The spiral mesh chain conveyor according to claim 16, wherein the vertical groove is a concave arc-shaped groove, a V-shaped groove, a trapezoidal groove, or a square groove.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present disclosure is described in further detail below with reference to the drawings and specific implementations. The drawings are provided for reference and illustration only, and are not intended to limit the present disclosure.

[0038] FIG. 1 is a perspective view of a spiral mesh chain conveyor according to the present disclosure;

[0039] FIG. 2 is a top view of a spiral mesh chain conveyor according to the present disclosure;

[0040] FIG. 3 illustrates a working state of a guide member according to Embodiment 1 of the present disclosure;

[0041] FIG. 4 illustrates a working state of a guide member according to Embodiment 2 of the present disclosure;

[0042] FIG. 5 illustrates a first working state of a guide member according to Embodiment 3 of the present disclosure;

[0043] FIG. 6 illustrates a second working state of a guide member according to Embodiment 3of the present disclosure;

[0044] FIG. 7 is a perspective view of a guide member according to Embodiment 4 of the present disclosure;

[0045] FIG. 8 is a perspective view of a guide member according to Embodiment 5 of the present disclosure;

[0046] FIG. 9 is a perspective view of a guide member according to Embodiment 6 of the present disclosure;

[0047] FIG. 10 is a perspective view of a guide member according to Embodiment 7 of the present disclosure;

[0048] FIG. 11 is a perspective view of a guide member according to Embodiment 8 of the present disclosure;

[0049] FIG. 12 is a perspective view of a guide member according to Embodiment 9 of the present disclosure;

[0050] FIG. 13 is a perspective view of a guide member according to Embodiment 10 of the present disclosure;

[0051] FIG. 14 is a perspective view of a guide member according to Embodiment 11 of the present disclosure;

[0052] FIG. 15 is a perspective view of a guide member according to Embodiment 12 of the present disclosure;

[0053] FIG. 16 is a perspective view of a guide member according to Embodiment 13 of the present disclosure;

[0054] FIG. 17 illustrates a working state of a guide member according to Embodiment 14 of the present disclosure;

[0055] FIG. 18 illustrates a working state of a guide member according to Embodiment 15 of the present disclosure;

[0056] FIG. 19 is a perspective view of a guide member according to Embodiment 16 of the present disclosure;

[0057] FIG. 20 is a perspective view of a guide member according to Embodiment 17 of the present disclosure; and

[0058] FIG. 21 illustrates an engaged state between a guide member and a mesh chain according to Embodiment 17 of the present disclosure.

[0059] In the figures: 1: rotary drum, 1a: central shaft, 1b: driving vertical rod, 1c: rotary drum upright post, 2: mesh chain, 2a: mesh chain guiding head, 2b: linear segment, 2c: fan-shaped transition segment, 2d: engagement spiral, 2e: link driving end, 2f: mesh chain chamfer, 3: guide member, 3a: columnar segment, 3b: inlet oblique segment, 3c: stroke increasing segment, 3d: leading-in segment, 3e: strip ridge, 3e1: ridge overhead hook, 3e2: ridge buckling groove, 3f: vertical groove, 3g: heightening ridge, 4: limit member, 4a: vertical groove, and 5: frame.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0060] In the description of the present disclosure, the terms such as upper, lower, front, back, left, right, inner and outer are intended to indicate orientations or positions based on the drawings. It should be noted that these terms are merely intended to facilitate and simplify the description of the present disclosure, rather than to indicate or imply that the mentioned device must have the specific orientation. The present disclosure takes the lifting spiral as an example.

[0061] As shown in FIG. 1 and FIG. 2, the present disclosure provides a spiral mesh chain conveyor, including rotary drum 1 and mesh chains 2. The mesh chains 2 enter a periphery of the rotary drum 1 along linear segment 2b, namely a tangential direction of the rotary drum 1, enter engagement spiral 2d through fan-shaped transition segment 2c, and extend along a spiral line in a winding manner. The mesh chains 2 rotate synchronously with the rotary drum. Central shaft 1a is provided at a center of the rotary drum. An upper and a lower end of the central shaft 1a are supported on frame 5 through a bearing seat. A plurality of rotary drum upright posts 1c are uniformly arranged at the periphery of the rotary drum 1. Driving vertical rods 1b are respectively provided on outer walls of all or some of the uniformly spaced rotary drum upright posts 1c. An inner side of each link of the mesh chain 2 close to the rotary drum is provided with mesh chain guiding head 2a engaged with the driving vertical rod 1b. Guide member 3 is sleeved on an outer wall of an inlet end of the rotary drum upright post 1c. That is, a plurality of guide members 3 are uniformly provided on an outer wall of a lower end of the rotary drum upright post with the ascending spiral or an outer wall of an upper end of the rotary drum upright post with the descending spiral.

[0062] FIG. 3 illustrates the guide member according to Embodiment 1. Stroke increasing segment 3c and leading-in segment 3d are sequentially provided on an outer wall of the guide member 3 along a contact order of the mesh chain guiding head 2a. The stroke increasing segment 3c includes an outer wall being a plane and two transverse sides each provided with an arc chamfer. The leading-in segment 3d inclines to an outer wall of the rotary drum upright post 1c.

[0063] The guide member 3 is provided with raised strip ridge 3e along an axis of the outer wall of the stroke increasing segment 3c and an axis of an outer wall of the leading-in segment 3d. The strip ridge 3e has a circular cross section. A bottom of the circular cross section is connected to the guide member 3 integrally. That is, most of a circumference of the circular ridge is exposed on the outer wall of the guide member 3. A root of the circular ridge bonded with the guide member 3 is relatively narrow. A concave arc of an engaging surface of a side of the mesh chain guiding head 2a is hooked to a convex arc of a side of the strip ridge 3e. An outer edge of a tail end of the strip ridge 3e is flush with an outer edge of an inlet end of the driving vertical rod 1b, thereby realizing smooth docking. The strip ridge 3e may serve to prevent the mesh chain guiding heads 2a at a front side of the strip ridge from moving back, and prevent the inner sides of the mesh chains 2 from moving back for a tensile force of the linear segment 2b. Through strip ridge 3e, the mesh chain guiding head 2a may further be engaged with the driving vertical rod 1b more smoothly.

[0064] When the mesh chain guiding head 2a at a most front end of the fan-shaped transition segment 2c is engaged with the strip ridge 3e, namely the mesh chain guiding head enters the engagement spiral 2d, after the engagement spiral 2d advances a certain angle along the spiral line, the mesh chain guiding head 2a is engaged with the driving vertical rod 1b, and the mesh chain 2 is driven by the driving vertical rod 1b to advance continuously along the spiral line. The mesh chain guiding head 2a not engaged with the strip ridge 3e on the fan-shaped transition segment 2c is limited on the outer wall of the rotary drum and bears a tensile force of the rear linear segment 2b, so as to prevent the mesh chain on the fan-shaped transition segment 2c from moving back, and prevent the mesh chain 2 from being tensed on a spiral tower.

[0065] A plurality of vertical grooves 3f for allowing the mesh chain guiding head 2a to be embedded into are formed in an outer wall of an inlet end of the guide member along a width direction. The vertical grooves 3f are concave arc-shaped grooves. On the fan-shaped transition segment 2c, a plurality of mesh chain guiding heads 2a are embedded into corresponding vertical grooves 3f to jointly bear the tensile force of the linear segment 2b.

[0066] A tail end of the vertical groove 3f and an inlet end of the strip ridge 3e are flush with each other. The tail end of the vertical groove 3f may further extend into the outer wall of the stroke increasing segment 3c.

[0067] Since a radius of a circumference where the stroke increasing segment 3c is located is greater than a radius of a circumference where the driving vertical rod 1b is located, there is a radius difference to cause an arc length difference in response to a same central angle of the inner side of the mesh chain. When the mesh chain 2 transitioned through the leading-in segment 3d from the stroke increasing segment 3c is engaged with the driving vertical rod 1b, the arc length difference can counteract an engagement clearance and a loosened clearance in the past. The driving vertical rod 1b is engaged with the mesh chain guiding head 2a desirably and immediately, such that the driving vertical rod 1b can drive the inner side of the mesh chain normally for advancement. This prevents the reliance on the drag of the front mesh chain, and prevents the inner side of the mesh chain from moving back.

[0068] From a circumferential direction, there is a distance between an engaging surface of the mesh chain guiding head at an inlet of the stroke increasing segment 3c and an engaging surface of the driving vertical rod in a circumferential direction of the rotary drum. The distance is defined as the engagement clearance D1. After the mesh chain guiding head 2a is engaged with the corresponding driving vertical rod 1b, the driving vertical rod 1b drives the inner side of the mesh chain to advance a distance, thereby driving an outer side of the mesh chain to advance. The distance is defined as the loosened clearance D2.

[0069] When the mesh chain guiding head 2a starts to enter the stroke increasing segment 3c of the guide member 3, until it is separated from the leading-in segment 3d of the guide member 3, a central angle rotated by the guide member 3 around an axis of the rotary drum is defined as a stroke increasing phase angle. There is an arc length difference between an arc length of a spiral line corresponding to the stroke increasing phase angle and wound by the inner side of the mesh chain on the stroke increasing segment 3c and the leading-in segment 3d, and an arc length of a spiral line wound by the inner side of the mesh chain at the same phase angle along the rotary drum upright post 1c. The arc length difference is defined as arc length difference L, the arc length difference Lthe engagement clearance D1+the loosened clearance D2.

[0070] The greater a ratio of L/(D1+D2), the looser the outer sides of the mesh chain, thereby realizing loose conveyance and a stronger carrying capacity to ensure that the driving vertical rod 1b timely drives the mesh chain guiding heads 2a for advancement. This can prevent an accumulated error caused by the loosened clearance, and also prevent the mesh chains from being tensed for hysteresis or less advancement of the inner sides of the mesh chains.

[0071] In two-tower application, ratios of L/(D1+D2) of the two towers may also be not the same, so as to reduce a tensile force of a transition segment between the two towers.

[0072] FIG. 4 illustrates the guide member according to Embodiment 2. The strip ridge 3e has a square cross section. Two sides of the strip ridge 3e are a plane, and in transition with a top of the ridge through an arc angle. Other contents are the same as those in Embodiments. The vertical grooves 3f are located at the inlet end of the guide member 3.

[0073] FIG. 5 illustrates the guide member according to Embodiment 3. Columnar segment 3a, inlet oblique segment 3b, stroke increasing segment 3c, and leading-in segment 3d are sequentially provided on the outer wall of the guide member 3 along a contact order of the mesh chain guiding head 2a. Raised strip ridge 3e is provided along an axis of an outer wall of the inlet oblique segment 3b, an axis of an outer wall of the stroke increasing segment 3c, and an axis of an outer wall of the leading-in segment 3d.

[0074] The stroke increasing segment 3c and the leading-in segment 3d are respectively located on two oblique surfaces having different inclinations. A length direction of the strip ridge 3e on the stroke increasing segment 3c is parallel to the outer wall of the stroke increasing segment 3c. An inlet end of the strip ridge 3e extends to a slope of the inlet oblique segment 3b and intersects with the slope of the inlet oblique segment. A length direction of the strip ridge 3e on the leading-in segment 3d is parallel to the outer wall of the leading-in segment 3d. A radius of the strip ridge on the leading-in segment 3d is less than a radius of the strip ridge on the stroke increasing segment 3c. The strip ridge on the leading-in segment and the strip ridge on the stroke increasing segment are in smooth transition.

[0075] The stroke increasing segment 3c may further be parallel to a bottom edge of the guide member 3. An axis of the strip ridge 3e on the stroke increasing segment 3c is parallel to the bottom edge of the guide member 3.

[0076] A plurality of vertical grooves 3f are uniformly formed in a width direction of the columnar segment 3a. The vertical groove 3f is a concave arc-shaped groove. A tail end of the vertical groove 3f is spaced apart from the inlet end of the strip ridge 3e by a distance.

[0077] A vertical strip rib is provided between two adjacent vertical grooves 3f. The inlet end of the strip ridge 3e is flush with the middle vertical strip rib.

[0078] The mesh chain guiding head 2a contacts a smooth surface of the columnar segment 3a first. As the mesh chain winds up, at least one of the mesh chain guiding heads 2a is embedded into the vertical groove 3f, and hooked with the vertical groove, as shown in FIG. 5. As the mesh chain 2 winds up, the mesh chain guiding head 2a is hooked by the strip ridge 3e, as shown in FIG. 6.

[0079] A distance between the outer wall of the stroke increasing segment and the axis of the rotary drum is greater than a distance between the outer wall of the rotary drum upright post and the axis of the rotary drum. When a larger stroke is to be increased, the distance between the outer wall of the stroke increasing segment and the axis of the rotary drum may be greater than a distance between an outer edge of the driving vertical rod and the axis of the rotary drum. A distance between the outer wall of the columnar segment and the axis of the rotary drum is greater than the distance between the outer wall of the stroke increasing segment and the axis of the rotary drum. The inlet oblique segment 3b serves as a transition oblique surface between the columnar segment 3a and the stroke increasing segment 3c. The leading-in segment 3d serves as a transition oblique surface between the stroke increasing segment 3c and the inlet end of the driving vertical rod 1b.

[0080] Inner sides of mesh chains may abut against the columnar segment 3a of the guide member 3 to rotate to the rotary drum, and get close to each other. The inner sides of the mesh chains are transitioned by the inlet oblique segment 3b to enter the stroke increasing segment 3c. A circumference where the columnar segment 3a of the guide member 3 is located is greater than a circumference where the stroke increasing segment 3c is located by a certain radius, such that the mesh chains 2 are looser when reaching the stroke increasing segment 3c from the columnar segment 3a.

[0081] From a top direction, there is a distance between an engaging surface of the mesh chain guiding head on the inlet oblique segment 3b and an engaging surface of the driving vertical rod in a circumferential direction of the rotary drum. The distance is defined as engagement clearance D1. After the mesh chain guiding head 2a is engaged with the corresponding driving vertical rod, the driving vertical rod drives the inner side of the mesh chain to advance a distance, thereby driving an outer side of the mesh chain to advance. The distance is defined as loosened clearance D2.

[0082] When the mesh chain guiding head 2a starts to enter the inlet oblique segment 3b of the guide member 3, until it is separated from the leading-in segment 3d of the guide member 3, a central angle rotated by the guide member 3 around an axis of the rotary drum is defined as a stroke increasing phase angle. There is an are length difference between an arc length of a spiral line corresponding to the stroke increasing phase angle and wound by the inner side of the mesh chain on the inlet oblique segment 3b, the stroke increasing segment 3c and the leading-in segment 3d, and an arc length of a spiral line wound by the inner side of the mesh chain at the same phase angle along the rotary drum upright post 1c. The arc length difference is defined as are length difference L. The arc length difference L in the embodiment includes arc length difference L1 caused by the inlet oblique segment 3b, arc length difference L2 caused by the stroke increasing segment 3c, and arc length difference L3 caused by the leading-in segment 3d.

[0083] The guide member is provided with the raised strip ridge 3e along the axis of the outer wall of the inlet oblique segment 3b to the axis of the outer wall of the leading-in segment 3d. The raised strip ridge 3e includes one end flush with the columnar segment 3a of the guide member, and the other end smoothly docked with the inlet end of the driving vertical rod 1b.

[0084] A difference between the distance between the outer wall of the stroke increasing segment and the axis of the rotary drum, and a radius of the rotary drum is the same as a thickness of the stroke increasing segment. The radius of the rotary drum is the distance between the outer wall of the rotary drum upright post 1c and the axis of the rotary drum. Due to the arc length difference generated by an axial length of the rotary drum and the thickness of the rotary drum, the mesh chain guiding head 2a can be engaged smoothly when reaching the driving vertical rod.

[0085] A width of the guide member 3 relative to a perimeter of the rotary drum is very small. The columnar segment 3a and the stroke increasing segment 3c of the guide member 3 may be a cylindrical arc-shaped surface with the axis of the rotary drum as a center, and may also be a plane approximately. The inlet oblique segment 3b and the leading-in segment 3d of the guide member 3 may also be a conical surface with the axis of the rotary drum as a center, and may also be an oblique surface approximately, so as to simplify the machining.

[0086] FIG. 7 illustrates the guide member according to Embodiment 4. The vertical groove 3f is a V-shaped groove, and is formed at the tail end of the columnar segment 3a. Other contents are the same as those in Embodiment 3. The strip ridge 3e has a circular cross section. A bottom of the circular cross section is connected to the guide member 3 integrally.

[0087] FIG. 8 illustrates the guide member according to Embodiment 5. The vertical groove 3f is a square groove, and is formed at the tail end of the columnar segment 3a. Other contents are the same as those in Embodiment 3.

[0088] FIG. 9 illustrates the guide member according to Embodiment 6. Columnar segment 3a, stroke increasing segment 3c, and leading-in segment 3d are sequentially provided on the outer wall of the guide member 3 along a contact order of the mesh chain guiding head 2a. A plurality of vertical grooves 3f are uniformly formed in a width direction of the columnar segment 3a. The vertical groove 3f is a concave arc-shaped groove. Raised strip ridge 3e is provided along an axis of an outer wall of the stroke increasing segment 3c and an axis of an outer wall of the leading-in segment 3d. The strip ridge 3e includes a top being a plane, two sides each being a circular arc, and a root bonded with the guide member 3 being narrowed. The stroke increasing segment 3c and the leading-in segment 3d are respectively located on different oblique surfaces. The stroke increasing segment 3c is relatively steep, while the leading-in segment 3d is relatively flat. An axis of the strip ridge 3e is parallel to the outer wall of the leading-in segment 3d, extends to the stroke increasing segment 3c, and intersects with the stroke increasing segment.

[0089] FIG. 10 illustrates the guide member according to Embodiment 7. The vertical groove 3f is a concave arc-shaped groove, and is formed at the tail end of the columnar segment 3a. The strip ridge 3e includes a top being a circular arc, and two sides being a plane tangential to a top of the circular arc. Bottoms of the two sides of the strip ridge are connected to the guide member 3 integrally. Other contents are the same as those in Embodiment 3.

[0090] FIG. 11 illustrates the guide member according to Embodiment 8. The strip ridge 3e has a square section. Other contents are the same as those in Embodiment 7.

[0091] FIG. 12 illustrates the guide member according to Embodiment 9. Columnar segment 3a, stroke increasing segment 3c, and leading-in segment 3d are provided. The stroke increasing segment 3c and the leading-in segment 3d are located on a same oblique surface. That is, a relatively thick portion close to the columnar segment 3a is the stroke increasing segment 3c, and a relatively thin portion close to the driving vertical rod 1b is the leading-in segment 3d. Vertical groove 3f is formed at a tail end of the columnar segment 3a. A tail end of the vertical groove 3f extends to an inlet end of the stroke increasing segment 3c. The strip ridge has a circular cross section. An axis of the ridge is parallel to a bottom edge of the guide member 3, is inserted into the oblique surface, and intersects with the oblique surface.

[0092] FIG. 13 illustrates the guide member according to Embodiment 10. The strip ridge 3e has a square cross section. Other contents are the same as those in Embodiment 9. An axis of the ridge is parallel to a bottom edge of the guide member 3, is inserted into the oblique surface, and intersects with the oblique surface.

[0093] FIG. 14 illustrates the guide member according to Embodiment 11. The strip ridge 3e has a square cross section. An axis of the ridge is parallel to an oblique surface of the guide member 3. The inlet end of the strip ridge 3e is provided with a chamfer. Other contents are the same as those in Embodiment 10.

[0094] FIG. 15 illustrates the guide member according to Embodiment 12. The inner side of each link of the mesh chain 2 is provided with link driving end 2e extending to the outer wall of the rotary drum. The mesh chain guiding head 2a is located at a head of the link driving end 2e. A length of the link driving end 2e is far greater than a length of the mesh chain guiding head 2a. Heightening ridge 3g connected to the strip ridge integrally is provided at a top of the strip ridge 3e. The heightening ridge 3g has a square cross section. When the strip ridge 3e is engaged with the mesh chain guiding head 2a, a sidewall of heightening ridge 3g abuts against a sidewall of the corresponding link driving end 2e to form engagement. An engaging concave arc is usually provided at a sidewall of the mesh chain guiding head 2a. The engaging sidewall of the heightening ridge 3g and the engaging sidewall of the link driving end 2e are a plane.

[0095] The mesh chain is usually a plastic part. An area of engagement between the mesh chain guiding head 2a and the strip ridge 3e is relatively small. In case of a large tensile force of the mesh chain, slip or skip still occurs possibly. After the heightening ridge 3g is provided, the radial engagement height of the rotary drum is greatly increased. The heightening ridge 3g and the link driving end 2e are engaged to jointly work for transmission and load bearing. This can completely prevent the skip.

[0096] FIG. 16 illustrates the guide member according to Embodiment 13. A cross section of the strip ridge 3e is a T shape that is wide outside and narrow inside. The mesh chain guiding head 2a matching with the strip ridge is also provided with a T-shaped head that is wide outside and narrow inside. Two T-shaped heads have opposite directions, and are hooked to each other in engagement. This can prevent the skip of the mesh chain.

[0097] The strip ridge 3e may also be provided with ridge overhead hook 3e1. The mesh chain guiding head 2a is provided with a mesh chain overhead hook matching with the ridge overhead hook. The mesh chain overhead hook and the ridge overhead hook 3e1 are hooked to each other in engagement, so as to prevent the slip or skip in case of the large load.

[0098] FIG. 17 illustrates the guide member according to Embodiment 14. The guide members 3 are spaced apart at inlet ends of the rotary drum upright posts 1c. For example, every two rotary drum upright posts 1c are provided with one guide member 3. The strip ridge 3e is provided on the guide member 3. Limit member 4 is provided between adjacent guide members 3. The limit member 4 and the guide member 3 are arranged alternately at the periphery of the rotary drum. A plurality of vertical grooves 4a for allowing the mesh chain guiding head 2a to be embedded into are formed in an outer wall of the limit member 4 along a width direction. The outer wall of the limit member 4 provided with the vertical groove 4a and the outer wall of the columnar segment 3a of the adjacent guide member 3 are located on a same circumference. The limit member 4 is also fixed at the inlet end of the rotary drum upright post 1c. The inlet end of the guide member 3 may also be provided with the vertical grooves 3f.

[0099] The limit member 4 may be different from the guide member 3 in shape. The guide member not provided with the strip ridge may also be used as the limit member 4, so as to save the mold and the manufacturing cost.

[0100] As shown in FIG. 17, the mesh chains on the linear segment 2b advance to the fan-shaped transition segment 2c. At a tail end of the fan-shaped transition segment 2c, the strip ridge 3e is engaged with the mesh chain guiding head 2a. The rotary drum 1 hooks the mesh chains 2 to enter the engagement spiral 2d. While the rotary drum rotates, the mesh chains wind up. On the fan-shaped transition segment 2c, a plurality of mesh chain guiding heads 2a are embedded into the vertical grooves 4a of the limit member 4 and the vertical grooves 3f of the guide member 3, and are hooked, thereby jointly coping with the tensile force of the linear segment 2b, preventing the links on the fan-shaped transition segment 2c from moving back, and preventing the mesh chains 2 on the rotary drum 1 from being tensed.

[0101] FIG. 18 illustrates the guide member according to Embodiment 15. The strip ridge 3e extends to a middle of the stroke increasing segment 3c from the leading-in segment 3d. A plurality of vertical grooves 3f for allowing the mesh chain guiding head 2a to be embedded into are formed in an outer wall of an inlet end of the guide member 3 along a width direction. The vertical groove 3f in the middle of the guide member extends to an inlet end of the strip ridge 3e, namely the vertical groove is docked with the strip ridge 3e. The vertical grooves 3f at two sides of the guide member exceed the inlet end of the strip ridge 3e.

[0102] When the mesh chain guiding heads 2a move up along the stroke increasing segment 3c with the vertical grooves 3f, a radial diameter of the rotary drum is reduced, such that the outer sides of the mesh chains move back, and the front mesh chains in an advancement direction of the guide member 3 get close to the guide member 3. Hence, looseness between the inner sides of the mesh chains in the advancement direction of the guide member 3 is eliminated. After the looseness is eliminated, the mesh chain guiding heads 2a at the inner sides of the mesh chains are slid out of the vertical grooves 3f to move back with the outer sides of the mesh chains. After reaching a height of the strip ridge 3e, the mesh chain guiding heads are stopped by the strip ridge 3e, and move up continuously along the strip ridge 3e. After the limited mesh chains reach a periphery of the rotary drum having a smaller diameter, the outer sides of the mesh chains are loosened.

[0103] When the mesh chain is overloaded, the mesh chain guiding head 2a is popped out from the original engaged vertical groove and slides into the downstream vertical groove. The strip ridge 3e starts from a middle of an oblique surface of the stroke increasing segment 3c. An excessive increased stroke at a lower portion of the stroke increasing oblique surface may be eliminated by slip of the mesh chain guiding head 2a, such that the increased stroke generated by the subsequent strip ridge 3e is more appropriate.

[0104] FIG. 19 illustrates the guide member according to Embodiment 16. Buckling groove 3e2 is formed in a sidewall of the strip ridge 3e. A mesh chain buckling groove is formed in a sidewall of the corresponding mesh chain guiding head 2a. The ridge buckling groove and the mesh chain buckling groove 3e2 are embedded into each other. A top of the strip ridge 3e is convex arc-shaped, so as to facilitate smooth transition in engagement.

[0105] A ridge chamfer with an upper portion inclining backward is provided at an inlet end of the strip ridge 3e. A surface of the ridge chamfer contacting the mesh chain guiding head 2a is arc-shaped. The mesh chain guiding head 2a abuts against an arc-shaped surface of the ridge chamfer for sliding, and is engaged gradually.

[0106] FIG. 20 and FIG. 21 illustrate the guide member according to Embodiment 17. More or more buckling grooves 3e2 is formed in the sidewall of the strip ridge 3e. Corresponding mesh chain buckling grooves are formed in the sidewall of the corresponding mesh chain guiding head 2a. The ridge buckling groove and the mesh chain buckling groove 3e2 are embedded into each other. A top of the strip ridge 3e is convex arc-shaped. A head of the mesh chain guiding head 2a is also convex arc-shaped. This facilitates the mesh chain guiding head 2a to slide from the top of the strip ridge 3e, and engage with the strip ridge 3e.

[0107] Mesh chain chamfer 2f is provided on a mesh chain engaging tooth close to the mesh chain guiding head 2a. The mesh chain chamfer 2f can be slid quickly when contacting the convex arc-shaped top of the strip ridge 3e to prevent the clamping stagnation.

[0108] The ridge buckling groove 3e2 or the mesh chain buckling groove may be a rectangle, a triangle, a trapezoid, a semicircle, or other shapes embedded into each other.

[0109] The above described are merely preferred possible embodiments of the present disclosure, and should not be construed as a limitation to the protection scope of the present disclosure. The disclosure may have other implementations in addition to those described above. All technical solutions formed by equivalent replacements or equivalent transformations should fall within the protection scope of the present disclosure. The technical features that are not described herein can be implemented by or using the existing technology, and will not be repeated herein.