ROPE TENSIONER

Abstract

A rope tensioner which includes a take-up reel and a take-up spring. A damping assembly is configured for the take-up reel and includes a follower gear, a damping gear and a damping removal component. The follower gear is configured to rotate synchronously with the take-up reel. The damping gear is movably configured and keeps in damping engagement with the follower gear. The damping removal component is movably configured, and when an external force for removing the damping engagement is applied to the damping removal component, the damping removal component promotes the damping gear to disengage from the follower gear to relieve or remove the damping engagement. The situation where a hook rebounds under the action of inertia when a rope is taken up and hits against products and even causes injuries to users is avoided.

Claims

1. A rope tensioner, comprising a take-up reel and a take-up spring, the take-up reel being rotatably configured to take up and pay off a rope, and the take-up spring applying a take-up elastic force for taking up the rope to the take-up reel, wherein a damping assembly is configured for the take-up reel, the damping assembly comprises a follower gear, a damping gear and a damping removal component, the follower gear is configured to rotate synchronously with the take-up reel, the damping gear is movably configured and keeps in damping engagement with the follower gear, the damping removal component is movably configured, and when an external force for removing the damping engagement is applied to the damping removal component, the damping removal component promotes the damping gear to disengage from the follower gear to relieve or remove the damping engagement.

2. The rope tensioner according to claim 1, wherein the follower gear and the take-up reel are configured coaxially.

3. The rope tensioner according to claim 1, wherein the damping gear is configured swingably.

4. The rope tensioner according to claim 1, wherein the damping gear keeps in damping engagement with the follower gear by means of an elastic force of a first elastic element.

5. The rope tensioner according to claim 1, wherein the damping removal component is a button, and the button is configured to relieve or remove the damping engagement when pressed.

6. The rope tensioner according to claim 1, wherein the rope tensioner comprises a support, the support is provided with a first wall and a second wall spaced apart from the first wall, and the take-up reel is rotatably assembled between the first wall and the second wall of the support.

7. The rope tensioner according to claim 6, wherein a first side cover is assembled on an outer side of the first wall of the support, the damping assembly is assembled between the first wall and the first side cover, the follower gear and the damping gear are covered with the first side cover, and the damping removal component sticks out from the first side cover to be operated.

8. The rope tensioner according to claim 6, wherein a second side cover is assembled on an outer side of the second wall of the support, and the take-up spring is covered with the second side cover.

9. The rope tensioner according to claim 8, wherein a rotating shaft is assembled between the first side wall and the second side wall of the support, the take-up reel and the follower gear are assembled on the rotating shaft and rotate synchronously with the rotating shaft, the take-up spring is a flat spiral spring, an outer end of the flat spiral spring is fixed to the second wall of the support, and an inner end of the flat spiral spring is fixed to the rotating shaft.

10. The rope tensioner according to claim 6, wherein: the rope tensioner comprises a locking component, a handle and a pawl component; ratchet wheels are arranged on the take-up reel; the locking component is movably assembled on the support and switched between a first engagement position and a first disengagement position; when located at the first engagement position, the locking component keeps in unidirectional engagement with the ratchet wheels of the take-up reel by means of an elastic force of a second elastic element; when located at the first disengagement position, the locking component disengages from the ratchet wheels of the take-up reel; the handle is rotatably assembled on the support; the pawl component is movably assembled on the handle and switched between a second engagement position and a second disengagement position; when located at the second engagement position, the pawl component keeps in unidirectional engagement with the ratchet wheels of the take-up reel; when located at the second disengagement position, the pawl component disengages from the ratchet wheels of the take-up reel; wherein, the unidirectional engagement allows the take-up reel to rotate in a rope take-up direction and prevents the take-up reel from rotating in a rope pay-off direction; in addition, when the locking component is located at the first engagement position and the pawl component is located at the second engagement position, the take-up reel is pushed step-by-step to take up the rope by means of back-and-forth rotation of the handle; when the locking component is located at the first disengagement position and the pawl component is located at the second disengagement position, the take-up reel is allowed to pay off and take up the rope.

11. The rope tensioner according to claim 10, wherein: the support is provided with positioning grooves and limiting grooves, and with the rotation of the handle, the pawl component is switched between the positioning grooves and the limiting grooves; a cam portion is arranged on the handle; when disposed in the positioning grooves, the pawl component is located at the second disengagement position, the cam portion pushes the locking component to the first disengagement position, and the pawl component and the locking component both disengage from the ratchet wheels of the take-up reel; when disposed in the limiting groove, the pawl component is located at the second engagement position, the cam portion gives way to the locking component to allow the locking component to be located at the first engagement position, and the pawl component and the locking component both keep in unidirectional engagement with the ratchet wheels of the take-up reel.

12. The rope tensioner according to claim 11, wherein a stop portion and a first arc-shaped guide surface smoothly connected between the cam portion and the stop portion are arranged on the handle.

13. The rope tensioner according to claim 11, wherein bottom surfaces of the limiting grooves are second arc-shaped guide surfaces.

14. The rope tensioner according to claim 11, wherein the pawl component is swingably assembled on the handle and positioned in the positioning grooves or the limiting grooves by means of an elastic force of a third elastic element, and when switched between the positioning grooves and the limiting grooves, the pawl component overcomes the elastic force of the third elastic element to allow the pawl component to turn to disengage from the positioning grooves or the limiting grooves.

15. The rope tensioner according to claim 11, wherein the pawl component is provided with protrusions, and the pawl component is located in the positioning grooves or the limiting grooves by means of the protrusions.

16. The rope tensioner according to claim 10, wherein the handle and the take-up reel are coaxially assembled on the support, the handle is provided with a first arm and a second arm spaced apart from the first arm, the first arm is close to an inner side of the first wall and rotatably assembled on the first wall, and the second arm is close to an inner side of the second wall and rotatably assembled on the second wall.

17. The rope tensioner according to claim 6, wherein an end cover is fixedly configured at an end of the support, a through-hole is formed in the end cover, and the rope wound around the take-up reel penetrates through the through-hole.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0040] FIG. 1 is an axonometric diagram of a rope tensioner according to the invention.

[0041] FIG. 2 is an exploded structural view of the rope tensioner in FIG. 1.

[0042] FIG. 3 is an enlarged view of a support, a rotating shaft and a take-up reel in FIG. 2.

[0043] FIG. 4 is an enlarged view of the support, a handle, a locking component and a pawl component in FIG. 2.

[0044] FIG. 5 is an enlarged view of the support, the rotating shaft, a damping assembly and a first side cover in FIG. 2.

[0045] FIG. 6 is an enlarged view of the support, a take-up spring and a second side cover in FIG. 2.

[0046] FIG. 7 is an orthographic projection diagram of the rope tensioner, in FIG. 1, provided with a rope and hooks.

[0047] FIG. 8 is a schematic internal structural diagram of FIG. 7 from a left view.

[0048] FIG. 9 is a schematic internal structural diagram of the rope tensioner in a storage state according to the invention.

[0049] FIG. 10 is a schematic internal structural diagram of the rope tensioner in a rope pay-off state and take-up state according to the invention.

[0050] FIG. 11 is a schematic internal structural diagram of the rope tensioner in a state where a rope is tensioned according to the invention.

REFERENCE SIGNS

[0051] 100, take-up reel; 101, ratchet wheel; [0052] 200, take-up spring; 201, second side cover; [0053] 300, rope; 301, end cover; 302, through-hole; 303, first hook; 304, fixing pin; 305, connecting piece; 306, second hook; [0054] 400, damping assembly; 401, follower gear; 402, damping gear; 403, damping removal component; 404, first elastic element; 405, first side cover; 406, hinge pin; 407, fourth elastic element; [0055] 500, support; 501, first wall; 502, second wall; 503, positioning groove; 504, limiting groove; 505, second arc-shaped guide surface; 506, pillar; 507, flat hole; 508, retaining ring; [0056] 600, rotating shaft; 601, slot; 602, plane; [0057] 700, locking component; 701, second elastic element; [0058] 800, handle; 801, cam portion; 802, stop portion; 803, first arc-shaped guide surface; 804, first arm; 805, second arm; 805, rubber coating; 807, hole; [0059] 900, pawl component; 901, third elastic element; 902, protrusion; 903, press portion; 904, foot.

DETAILED DESCRIPTION OF THE INVENTION

[0060] To better clarify the objectives, technical solutions and advantages of the invention, the technical solutions in the embodiments of the invention are clearly and completely described below in conjunction with accompanying drawings of the invention. Apparently, the embodiments described below are merely illustrative ones, and are not all possible ones of the invention. All other embodiments obtained by those ordinarily skilled in the art according to the following ones without creative labor should also fall within the protection scope of the invention.

[0061] Terms include and provided with and any variations thereof in the description and claims of the invention are intended to indicate non-exclusive inclusion. For example, a method or product including a series of technical features is not limited to technical features that are clearly listed and may also include other technical features that are not clearly listed and included in the method or product.

[0062] In the description of the invention, it should be understood that technical features defined by terms of sequence such as first, second and third are merely for clearly describing technical features defined to distinctly distinguish the technical features from other technical features, do not indicate that components must be named in this way in actual implementation, and thus should not be construed as limitations of the invention.

[0063] The invention is described in detail below in conjunction with specific embodiments and accompanying drawings.

[0064] As shown in FIGS. 1, 3, 5 and 7-8, a rope tensioner includes a take-up reel 100 and a take-up spring 200. The take-up reel 100 is rotatably configured to take up and pay off a rope 300. The take-up spring 200 applies a take-up elastic force for taking up the rope to the take-up reel 100. That is, under the action of the take-up elastic force provided by the take-up spring, the take-up reel, when in the position shown in FIG. 10, is able to rotate anticlockwise to take up the rope that is paid off. When the rope wound around the reel is pulled outwards, the take-up elastic force of the take-up spring will be overcome to allow the take-up reel to rotate in a reverse direction to pay off the rope. Wherein, the take-up spring is configured to generate a certain torsional force used as the take-up elastic force when the rope is pulled out, the torsional force will increase constantly as the rope is pulled out and reach a threshold when the rope is completely pulled out. The threshold is preferably in balance with the length of the rope pulled out.

[0065] Particularly, as shown in FIGS. 2 and 5, a damping assembly 400 is configured for the take-up reel 100. The damping assembly 400 includes a follower gear 401, a damping gear 402 and a damping removal component 403. The follower gear 401 is configured to rotate synchronously with the take-up reel 100. The damping gear 402 is configured movably and keeps in damping engagement with the follower gear 401. The damping removal component 403 is configured movably. When an external force for removing the damping engagement is applied to the damping removal component, the damping removal component promotes the damping gear 402 to disengage from the follower gear 401 to relieve or remove the damping engagement.

[0066] In this way, when the rope is pulled out, the follower gear 401 rotates synchronously with the take-up reel 100, the damping gear 402 does not rotate, and the damping gear 402 keeps in damping engagement with the follower gear 401, so the take-up reel is damped, that is, the follower gear, while rotating, slides with respect to the damping gear to be intermittently stopped by the damping gear. Because the take-up reel is damped, the take-up reel will not rotate in the reverse direction, and the rope pulled out will not be rewound. Due to the presence of the damping engagement, when the rope is released to allow the take-up reel to rotate, teeth of the follower gear 401 rotate with respect to teeth of the damping gear 402 and slide over the teeth of the damping gear 402, and dadaimpact sounds are produced.

[0067] On the contrary, when the released rope is taken up, an external force for removing the damping engagement is applied to the damping removal component 402, the damping removal component promotes the damping gear 402 to disengage from the follower gear 401 to remove the damping engagement. Under the action of the take-up elastic force, for taking up the rope, applied to the take-up reel by the take-up spring, the take-up reel takes up the rope. In the take-up process, the damping removal component may be released to remove the external force, for removing the damping engagement, applied to the damping removal component, so as to resume the damping engagement, such that the take-up reel stops taking up the rope.

[0068] In the rope pay-off and take-up process, the take-up reel may be stopped by the damping engagement, so the damping engagement between the damping gear and the follower gear is similar to the fit between a pawl and a ratchet wheel, the damping gear is equivalent to the pawl, and the follower gear is equivalent to the ratchet wheel. As shown below, the follower gear 401 is a conventional circular external gear, and the teeth are distributed all over the circumference of the follower gear 401. Only a few teeth are distributed on part of the circumference of the damping gear 402, and the damping gear is not a complete gear and is in the shape of a bent rod, such that the flexibility of the damping gear is improved.

[0069] To be specific, as shown in FIGS. 2, 3 and 5, the follower gear 401 and the take-up reel 100 are assembled on a rotating shaft 600, and the rotating shaft is provided with a plane 602. The follower gear 401 and the take-up reel 100 are provided with through-holes, the cross-section of which is identical with the cross-section of the rotating shaft. The rotating shaft penetrates through the through-holes and fits the through-holes like a key and a key groove, such that the follower gear, the take-up reel and the rotating shaft rotate synchronously or stop synchronously, that is, the take-up reel and the follower gear are assembled on the rotating shaft and rotate synchronously with the rotating shaft. The middle of the damping gear 402 is swingably assembled on a support 500 by means of a hinge pin 406. In addition, the damping gear 402 keeps in damping engagement with the follower gear 406 by means of an elastic force of a first elastic element 404. The first elastic element 404 is a spiral tension spring, one end of the first elastic element 404 is connected to an upper end of the damping gear 402, and the other end of the first elastic element 404 is connected to a pillar 506 of the support 500, such that the teeth of the damping gear engage with the teeth of the follower gear. The damping removal component 403 is a button, and the button corresponds to the upper end of the damping gear 402. The button, when pressed, applies a downward press force to the upper end of the damping gear 402, the damping gear 402 is promoted to swing around the hinge pin 406, and a lower end of the damping gear 402 moves away from the follower gear 401 to relieve or remove the damping engagement. To promote the damping removal component to return after the damping removal component is pressed, a fourth elastic element 407 acts on the damping removal component 403, and as shown below, the fourth elastic element 407 is a spiral compression spring rested on the damping removal component.

[0070] In the structure shown below, the support 500 functions as a part installation base of the whole rope tensioner. As shown in FIGS. 3 and 6, the support 500 has a first wall 501 and a second wall 502 spaced apart from the first wall 501, and the take-up reel 100 is located between the first wall 501 and the second wall 502 and rotatably assembled on the support 500 by means of the rotating shaft 600.

[0071] As shown in FIGS. 2 and 5, a first side cover 405 is assembled on an outer side of the first wall 501 of the support 500, the damping assembly 400 is assembled between the first wall 501 and the first side cover 405, the follower gear 401 and the damping gear 402 are covered with the first side cover 405, and the damping removal component 403 sticks out from the first side cover 405 to be operated.

[0072] As shown in FIGS. 2 and 6, a second side cover 201 is assembled on an outer side of the second wall 502 of the support, and the take-up spring 200 is covered with the second side cover 201. In addition, the rotating shaft 600 penetrates through the first wall 501 and the second wall 502 of the support and is rotatably assembled on the first wall and the second wall. The take-up spring 200 is a flat spiral spring, and an outer end of the flat spiral spring is fixed to the second wall of the support, for example, the outer end of the flat spiral spring is hooked on a pillar on the outer side of the second wall. An inner end of the flat spiral spring is fixed to the rotating shaft. In the structure shown below, the rotating shaft 600 extends to the outer side of the second wall, a slot 601 is formed in a section, extending out of the outer side of the second wall, of the rotating shaft 600, and the inner end of the flat spiral spring is clamped in the slot. In this way, with the rotation of the take-up reel and the rotating shaft, the flat spiral spring deforms and produces a torsional force.

[0073] Further, as shown in FIGS. 2 and 4, the rope tensioner includes a locking component 700, a handle 800 and a pawl component 900. Ratchet wheels 101 are arranged on the take-up reel 100. To be specific, the take-up reel 100 is formed by fixedly configuring a circular plate at each of two ends of a cylindrical reel, and gears are distributed on peripheral edges of the circular plates to form the ratchet wheels.

[0074] The locking component 700 is movably assembled on the support 500 and is switchable between a first engagement position and a first disengagement position. To be specific, the locking component 700 is plate-like, corresponding flat holes 507 are formed in the first wall 501 and the second wall 502 of the support, and two ends of the locking component 700 are respectively located in the corresponding flat holes in the first wall and the second wall and are able to move in the flat holes to the first engagement position or the first disengagement position. When located at the first engagement position, the locking component 700 keeps in unidirectional engagement with the ratchet wheels of the take-up reel by means of the elastic force of the second elastic element 701 and may be pushed away from the ratchet wheels. When located at the first disengagement position, the locking component disengages from the ratchet wheels of the take-up reel.

[0075] As shown in FIGS. 3 and 4, the handle 800 and the take-up reel 100 are coaxially assembled on the support 500. In the structure shown below, retaining rings 508 are arranged on an inner side of the first wall 501 and an inner side of the second wall, and the rotating shaft 600 penetrates through the retaining rings 508. The handle 800 is provided with a first arm 804 and a second arm 805 spaced apart from the first arm 804. The first arm 804 is close to the inner side of the first wall 501 and rotatably disposed around the corresponding retaining ring to be assembled on the first wall, and the second arm 805 is close to the inner side of the second wall 502 and rotatably disposed around the corresponding retaining ring to be assembled on the second wall. In this way, a space is formed between the first arm 804 and the second arm 805 of the handle and used for assembling the pawl component 900. Such an arm structure has a suitable contour to be held and operated by users and provides a structural basis for assembling the pawl component, thus making the structure compact; in addition, the pawl component may be easily controlled by hand, that is, users may operate the pawl component while holding the handle by hand.

[0076] To improve the hand feeling and comfort of the handle, a rubber coating 806 is laid on the handle.

[0077] As shown in FIGS. 2 and 5, the pawl component 900 is movably assembled on the handle 800 and switched between a second engagement position and a second disengagement position. In the structure shown below, corresponding holes 807 are formed in the first arm 804 and the second arm 805 of the handle. The pawl component 900 is also in the shape of a plate, protrusions 902 are arranged on two sides of one end of the pawl component 900, a press portion 903 extending out from the middle of the other end of the pawl component 900, and a foot 904 is arranged on each of two sides of the other end of the pawl component 900. The pawl component 900 is located between the first arm 804 and the second arm 805 of the handle, and the feet 904 of the pawl component are located in the corresponding holes 807 to function as fulcrums of a lever to allow the pawl component to be swingably assembled on the handle and promote the pawl component to swing to the second engagement position and the second disengagement position. When located at the second engagement position, the pawl component keeps in unidirectional engagement with the ratchet wheels 101 of the take-up reel by means of the protrusions 902. When located at the second disengagement position, the pawl component disengages from the ratchet wheels 101 of the take-up reel by means of the protrusions 902.

[0078] Wherein, the unidirectional engagement between the protrusions of the pawl component and the ratchet wheels and the unidirectional engagement between the locking component and the ratchet wheels are both defined as allowing the take-up reel to rotate in a rope take-up direction and preventing the take-up reel from rotating in a rope pay-off direction.

[0079] In addition, when the locking component 700 is located at the first engagement position and the pawl component 900 is located at the second engagement position, the take-up reel is pushed step-by-step to take up the rope by means of back-and-forth rotation of the handle 800. When the locking component is located at the first disengagement position and the pawl component is located at the second disengagement position, the take-up reel is allowed to pay off and take up the rope. In this way, the working mode of the rope tensioner may be switched as needed.

[0080] As shown in FIG. 4, the first wall 501 and the second wall 502 of the support are provided with positioning grooves 503 and limiting grooves 504, and the protrusions 902 of the pawl component rotate with the handle to be switched between the positioning grooves and the limiting grooves. As their names imply, the positioning grooves aim to position the pawl component and prevent the pawl component from moving, while the limiting grooves aim to limit the movement range of the pawl component, so the pawl component is allowed to move in the limiting grooves. When positioned or limited, the pawl component is not completely disposed in the positioning grooves or the limiting grooves. In the structure shown below, the pawl component 900 is disposed in the positioning grooves or the limiting grooves by means of the protrusions 902.

[0081] When disposed in the positioning grooves by means of the protrusion, the pawl component 900 is located at the second disengagement position, a cam portion 801 arranged on the handle 800 pushes the locking component 700 to the first disengagement position, and the pawl component and the locking component both disengage from the ratchet wheels of the take-up reel. Because the pawl component is positioned here, the disengagement of the pawl component and the locking component from the take-up reel is certain, and the take-up reel is allowed to pay off and take up the rope.

[0082] When the protrusions 902 of the pawl component 900 are located in the limiting grooves 504, the pawl component is located at the second engagement position, the cam portion 801 gives way to the locking component 700 to allow the locking component to return to the first engagement position by means of the elastic force of the second elastic element 701, and the pawl component 900 and the locking component 700 both keep in unidirectional engagement with the ratchet wheels 101. In this way, by rotating the handle back and forth, the protrusions 902 of the pawl component are driven to move back and forth in the limiting grooves 504 to push step-by-step the take-up reel to rotate to take up the rope.

[0083] As shown in FIG. 4, a stop portion 802 and a first arc-shaped guide surface 803 smoothly connected between the cam portion 801 and the stop portion 802 are arranged on the handle 800. Bottom surfaces of the limiting grooves 504 are second arc-shaped guide surfaces 505. When the handle is rotated to tension the rope, the first arc-shaped guide surface 803 slides with respect to the locking component; and when the stop portion 802 is stopped by the locking component 700, the handle is prevented from further rotating in this direction. The protrusions 902 of the pawl component 900 slide along the second arc-shaped guide surfaces 505 to be guided. In this way, smooth rotation of the handle is guaranteed.

[0084] As shown in FIG. 4, the protrusions 902 of the pawl component 900 are located in the positioning grooves 503 or the limiting grooves 504 by means of an elastic force of a third elastic element 901. As shown, the third elastic element 901 is a torsion spring and supports the handle and the pawl component to apply an elastic force to the pawl component. When the protrusions 902 of the pawl component need to be switched between the positioning grooves 503 and the limiting grooves 504, the press portion 903 of the pawl component is pressed to overcome the elastic force of the third elastic element 901 to allow the pawl component 900 to turn and the protrusions 902 to disengage from the positioning grooves 503 or the limiting grooves 504, then the handle 800 is rotated to pull the protrusions 902 into the limiting grooves 504 or the positioning grooves 503, and the press portion 903 is released, such that switching of the protrusions between the positioning grooves and the limiting grooves is realized.

[0085] As shown in FIGS. 2 and 5, an end cover 301 is fixedly configured at one end of the support 500, a through-hole 302 is formed in the end cover 301, and the rope 300 wound around the take-up reel penetrates through the through-hole.

[0086] According to the rope tensioner, as shown in FIGS. 7-8, to facilitate connection, an outer end of the rope 300 is led out from the through-hole in the end cover and connected to a first hook 303, and a second hook 306 is connected to the other end of the support 500 by means of a fixing pin 304 and a connecting piece 306 such as a woven tape. When an object needs to be tied, the rope 300 is pulled out, the first hook 303 and the second hook 306 are hooked to corresponding positions, and then the rope is tensioned to tie down the object.

[0087] The rope tensioner may be in a state shown in FIGS. 9-11. FIG. 9-11 also illustrate the working state and use method of the rope tensioner.

[0088] As shown in FIG. 9, the rope 300 is completely wound around the take-up reel 100, the first hook 303 abuts against the end cover 301 to pull the rope, the protrusions 902 of the pawl component 900 are located in the limiting grooves 504, and at this moment, the pawl component 900 and the locking component 700 engage with the ratchet wheels 101 to prevent the rope from being pulled out, such that the rope is prevented from being accidentally pulled out.

[0089] When the rope needs to be pulled out, the press portion 903 of the pawl component is pressed in the state shown in FIG. 9 to overcome the elastic force of the third elastic element 901 to allow the pawl component 900 to turn and the protrusions 902 to disengage from the limiting grooves 604, then the handle 800 is rotated clockwise to pull the protrusions 902 into the positioning grooves 503, then the press portion 903 is released, and the protrusions 902 are positioned in the positioning grooves 503, as shown in FIG. 10. When the pawl component 900 is located at the second disengagement position, the cam portion 801 of the handle pushes the locking component 700 to the first disengagement position, and the pawl component 900 and the locking component 700 both disengage from the ratchet wheels 101 of the take-up reel. At this moment, the rope may be pulled out by overcoming the damping force of the damping assembly 400, and when the rope is released, the take-up elastic force of the flat spiral spring increases accordingly. The first hook 303 and the second hook 306 may be hooked to corresponding positions.

[0090] When the rope needs to be tensioned, the button serving as the damping removal component 403 is pressed to promote the damping gear 402 to disengage from the follower gear 401 to remove damping engagement, and under the action of the take-up elastic force of the flat spiral spring, the take-up reel 100 is driven to rotate anticlockwise from the state shown in FIG. 10 to automatically take up and pre-tighten the rope. Then, the press portion 903 of the pawl component in the state shown in FIG. 10 is pressed to overcome the elastic force of the third elastic element 901 to allow the pawl component 900 to turn and the protrusions 902 to disengage from the positioning grooves 503, then the handle 800 is rotated anticlockwise to pull the protrusions 902 into the limiting grooves 504, then the press portion 903 is released, and the protrusions 902 return into the limiting grooves 504, as shown in FIG. 9. At this moment, the locking component 700 is located at the first engagement position, the pawl component 900 is located at the second engagement position, and the handle 800 is rotated back and forth to push step-by-step the take-up reel to take up the rope.

[0091] Wherein, the take-up reel is pushed step-by-step to take up the rope specifically as follows: when the handle 800 is rotated clockwise, the pawl component 900 pushes the ratchet wheels 101, the ratchet wheels 101 drive the take-up reel 100 to rotate clockwise to reach the state shown in FIG. 11, wherein the amplitude of clockwise rotation of the take-up reel 100 is limited by the limiting grooves 504. In the clockwise rotation process, the teeth of the ratchet wheels 101 slide over the locking component 700. Then, the handle 800 is rotated anticlockwise to return to the position shown in FIG. 9. When the handle returns to the position shown in FIG. 9, the locking component 700 prevents the ratchet wheels 101 and the take-up reel from rotating anticlockwise, and the pawl component 900 slides over the teeth of the ratchet wheels 101. In this way, by rotating the handle back and forth between the position shown in FIG. 9 and the position shown in FIG. 11, the take-up reel is driven to rotate clockwise step-by-step to tension the rope.

[0092] When the tensioned rope needs to be taken up, the handle 800 and the pawl component 900 are disposed at the positions shown in FIG. 10, the rope is pulled out properly, the first hook and the second hook are taken down, the button serving as the damping removal component 403 is pressed to promote the damping gear 402 to disengage from the follower gear 401 to remove damping engagement, and under the action of the take-up elastic force of the flat spiral spring, the take-up reel 100 is driven to rotate anticlockwise in the state shown in FIG. 10 to automatically take up the rope. When the rope is taken up automatically, the button may be released as needed to recover the damping engagement to stop the rope from being taken up, such that the situation where the rope is taken up quickly is avoided.

[0093] As described above, the rope tensioner is able to control the rope pay-off and take-up speed and effectively prevents the hook from rebounding under the action of inertia in the take-up process of the rope, thus avoiding accidental injuries to users.

[0094] Wherein, according to different degrees of damping engagement between the damping gear and the follower gear, the damping force to be overcome for taking up or paying off the rope varies. The higher the degree of engagement between the damping gear and the follower gear, the greater the damping force generated. The lower the degree of engagement between the damping gear and the follower gear, the smaller the damping force generated. Therefore, when an external force is applied to the damping removal component to remove damping engagement, the degree of disengagement of the damping gear from the follower gear is controlled to relieve or remove the damping engagement. When the damping gear completely disengages the follower gear, the damping engagement is completely removed. When the damping gear leaves the follower gear and still keeps in engagement with the follower gear and the degree of engagement decrease, the damping engagement is relieved.