CUTTING DEVICE OF INTEGRATED PAPER-PLASTIC BAG CUTTING AND SEALING MACHINE

Abstract

A cutting device of an integrated paper-plastic bag cutting and sealing machine includes a sliding bracket and a cutting knife. The sliding bracket is connected to a horizontal displacement driving mechanism. The sliding bracket is formed by connecting an upper plate with a rear plate. The sliding block is mounted on the rear plate through a connecting shaft and is capable of sliding back and forth along the connecting shaft, front and rear snapping grooves are arranged on the connecting shaft along the length direction. A cutting knife is mounted on the sliding block, its lowest position is lower than the bottom surface of the sliding block. A spring positioning column is mounted on the sliding block, the top end of the spring positioning column passes through the shaft hole wall of the connecting shaft of the sliding block and tightly presses against the connecting shaft.

Claims

1. A cutting device of an integrated paper-plastic bag cutting and sealing machine, comprising: a sliding bracket and a cutting knife, wherein the sliding bracket is connected to a horizontal displacement driving mechanism, the sliding bracket is formed by connecting an upper plate with a rear plate (4), a sliding block is mounted on the rear plate through an connecting shaft and the sliding block is able to slide back and forth along the connecting shaft, a front snapping groove and a rear snapping groove are arranged on the connecting shaft (2) along a length direction; the cutting knife is mounted on the sliding block, a lowest position of the cutting knife is lower than a bottom surface of the sliding block; a spring positioning column is mounted on the sliding block, a top end of the spring positioning column passes through a shaft hole wall of the connecting shaft of the sliding block and tightly presses against the connecting shaft.

2. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 1, wherein the horizontal displacement driving mechanism uses a pulley transmission mechanism, the sliding bracket further comprises an upper pressing plate, the upper pressing plate is located above the upper plate, the upper pressing plate is provided with a mounting groove for an assembly of a transmission belt in the pulley transmission mechanism, the transmission belt of the pulley transmission mechanism is placed between the upper pressing plate and the upper plate, the upper pressing plate is fixedly connected to the upper plate through a fixing member.

3. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 2, wherein a base plate is mounted behind the pulley transmission mechanism, a horizontal sliding groove is arranged on the base plate, a slider is arranged on a back surface of the rear plate of the sliding bracket, the slider is located in the horizontal sliding groove and slides left and right in the horizontal sliding groove along a X-axis direction.

4. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 1, wherein an adjusting bolt is mounted on the upper plate, a part of the adjusting bolt above the upper plate is mounted with a second nut, a lower end of the adjusting bolt presses against the sliding block.

5. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 1, wherein the sliding block is provided with a pin on a left end surface or right end surface along a X-axis direction, a pin poking mechanism is provided corresponding to the pin.

6. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 5, wherein the pin poking mechanism comprises a pin pull plate, a cam, a motor and a fixing bracket, the motor is mounted on the fixing bracket, the cam is mounted on an output shaft of the motor, the pin pull plate is assembled with the cam and driven by the cam to achieve a forth and back displacement along a Y-axis direction, an end of the pin pull plate close to the pin is provided with a pin inserting slotted hole, a hole diameter of the pin inserting slotted hole is larger than a diameter of the pin, a front limiting switch and a rear limiting switch are mounted on the fixing bracket along the Y-axis direction, the front limiting switch , the rear limiting switches and the motor are all connected to a control system of the integrated paper-plastic bag cutting and sealing machine.

7. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 6, wherein each of the front limiting switch and the rear limiting switch is a contact switch, an upper surface of the pin pull plate is provided with a groove, when the pin pull plate moves backward to a rear contact switch along the Y-axis direction, a front contact switch is located in the groove.

8. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 6, wherein the cam uses an eccenter, the pin pull plate is provided with an eccentric hole matched with the eccenter, the eccenter is assembled in the eccentric hole through a bearing.

9. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 6, wherein a first end of the spring is fixed on a plate surface of the pin pull plate close to the sliding bracket through the fixing member, a second end of the spring is mounted on a rack of the integrated paper-plastic bag cutting and sealing machine.

10. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 1, wherein an obliquely upward guiding plate and a photoelectric switch are mounted on the rack of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch is connected to a control system of the integrated paper-plastic bag cutting and sealing machine, a side of the sliding bracket close to the guiding plate is provided with an external convex plate, when the sliding block moves upward along the guiding plate to a position that a cutting surface of the cutting knife is higher than a plane of a paper-plastic bag in a paper feeding device of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch senses the external convex plate.

11. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 2, wherein the sliding block is provided with a pin on the a left end surface or right end surface along a X-axis direction, a pin poking mechanism is provided corresponding to the pin.

12. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 3, wherein the sliding block is provided with a pin on the a left end surface or right end surface along the X-axis direction, a pin poking mechanism is provided corresponding to the pin.

13. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 4, wherein the sliding block is provided with a pin on the a left end surface or right end surface along a X-axis direction, a pin poking mechanism is provided corresponding to the pin.

14. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 2, wherein an obliquely upward guiding plate and a photoelectric switch are mounted on the rack of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch is connected to a control system of the integrated paper-plastic bag cutting and sealing machine, a side of the sliding bracket close to the guiding plate is provided with an external convex plate, when the sliding block moves upward along the guiding plate to a position that a cutting surface of the cutting knife is higher than a plane of a paper-plastic bag in a paper feeding device of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch senses the external convex plate.

15. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 3, wherein an obliquely upward guiding plate and a photoelectric switch are mounted on the rack of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch is connected to a control system of the integrated paper-plastic bag cutting and sealing machine, a side of the sliding bracket close to the guiding plate is provided with an external convex plate, when the sliding block moves upward along the guiding plate to a position that a cutting surface of the cutting knife is higher than a plane of a paper-plastic bag in a paper feeding device of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch senses the external convex plate.

16. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 4, wherein an obliquely upward guiding plate and a photoelectric switch are mounted on the rack of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch is connected to a control system of the integrated paper-plastic bag cutting and sealing machine, a side of the sliding bracket close to the guiding plate is provided with an external convex plate, when the sliding block moves upward along the guiding plate to a position that a cutting surface of the cutting knife is higher than a plane of a paper-plastic bag in a paper feeding device of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch senses the external convex plate.

17. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 5, wherein an obliquely upward guiding plate and a photoelectric switch are mounted on the rack of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch is connected to a control system of the integrated paper-plastic bag cutting and sealing machine, a side of the sliding bracket close to the guiding plate is provided with an external convex plate, when the sliding block moves upward along the guiding plate to a position that a cutting surface of the cutting knife is higher than a plane of a paper-plastic bag in a paper feeding device of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch senses the external convex plate.

18. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 6, wherein an obliquely upward guiding plate and a photoelectric switch are mounted on the rack of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch is connected to the control system of the integrated paper-plastic bag cutting and sealing machine, a side of the sliding bracket close to the guiding plate is provided with an external convex plate, when the sliding block moves upward along the guiding plate to a position that a cutting surface of the cutting knife is higher than a plane of a paper-plastic bag in a paper feeding device of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch senses the external convex plate.

19. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 7, wherein an obliquely upward guiding plate and a photoelectric switch are mounted on the rack of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch is connected to the control system of the integrated paper-plastic bag cutting and sealing machine, a side of the sliding bracket close to the guiding plate is provided with an external convex plate, when the sliding block moves upward along the guiding plate to a position that a cutting surface of the cutting knife is higher than a plane of a paper-plastic bag in a paper feeding device of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch senses the external convex plate.

20. The cutting device of the integrated paper-plastic bag cutting and sealing machine according to claim 8, wherein an obliquely upward guiding plate and a photoelectric switch are mounted on the rack of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch is connected to the control system of the integrated paper-plastic bag cutting and sealing machine, a side of the sliding bracket close to the guiding plate is provided with an external convex plate, when the sliding block moves upward along the guiding plate to a position that a cutting surface of the cutting knife is higher than a plane of a paper-plastic bag in a paper feeding device of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch senses the external convex plate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1 is a perspective view of the present invention after omitting the pin poking mechanism;

[0027] FIG. 2 is a front view of FIG. 1;

[0028] FIG. 3 is a structural schematic view of the upper pressing plate;

[0029] FIG. 4 is a perspective view of the present invention applied to a integrated paper-plastic bag cutting and sealing machine;

[0030] FIG. 5 is a structural schematic view of a front view of the present invention applied to the integrated paper-plastic bag cutting and sealing machine;

[0031] FIG. 6 is a partial enlarged view of the part I of FIG. 5;

[0032] FIG. 7 is a structural schematic view of the left view of the present invention applied to the integrated paper-plastic bag cutting and sealing machine;

[0033] FIG. 8 is an A-A sectional view of FIG. 2.

[0034] In the drawings: 1, upper plate; 2, connecting shaft; 3, fixing member mounting holes; 4, rear plate; 5, sliding block; 6, roller; 7, cutting knife; 8, fastener; 9, spring top bead; 10, spring positioning column; 11, pin; 12, mounting groove; 13, external convex plate; 14, limiting switch; 15, fixing bracket; 16, motor; 17, cutting device; 18, horizontal displacement driving mechanism; 19, sealing device; 20, paper feeding device; 21, pin pull plate; 22, base plate; 23, horizontal sliding groove; 24, photoelectric switch; 25, guiding plate; 26, groove; 27, pin inserting slotted hole; 28, spring; 29, bearing; 30, eccenter; 31, first nut; 32, column body; 33, compression spring; 34, positioning bead; 35, snapping groove; 36, adjusting bolt; 37, second nut; 38, slider.

DETAILED DESCRIPTION

[0035] The embodiments of the present invention is further described below with reference to the drawings.

[0036] FIG. 1, FIG. 2, FIG. 3, and FIG. 8 are structural schematic views of a cutting device of an integrated paper-plastic bag cutting and sealing machine. The structure of the cutting device is as follows.

[0037] The cutting device includes a sliding bracket and a cutting knife 7, the sliding bracket is connected to a horizontal displacement driving mechanism 18, the sliding bracket is formed by connecting the upper plate 1 with the rear plate 4 in an L-shape (of course, it may also be directly pressed into one piece), the sliding block 5 is mounted on the rear plate 4 through a connecting shaft 2 and capable of sliding back and forth along the connecting shaft 2, front and rear snapping grooves 35 are arranged on the connecting shaft 2 along the length direction; a spring positioning column 10 is mounted on the sliding block 5, the top end of the spring positioning column 10 passes through the shaft hole wall of the connecting shaft in the sliding block 5 and tightly presses against the connecting shaft 2. The upper plate 1 is mounted with an adjusting bolt 36, a second_nut 37 is mounted at a part of the adjusting bolt 36 located above the upper plate 1, the lower end of the adjusting bolt 36 presses against the sliding block 5. The position of the sliding block 5 may be adjusted by the adjusting bolt 36, thereby adjusting the height of the cutting knife 7. A roller 6 is mounted on the lower part of the sliding block 5, the position of the roller 6 is close to the rear plate 4. A round cutting blade is used as the cutting knife 7, the round cutting blade is mounted on the sliding block 5 by a fastener 8 and moves along with the sliding block 5. The lowest position of the round cutting blade is lower than the bottom surface of the sliding block 5. In the present embodiment, the spring positioning column may use the following structure as shown in FIG. 8, specifically, including a column body 32, a compression spring 33 and a positioning bead 34. The column body 32 is screwed into the sliding block 5 from the outside to the inside, the lower part of the column body is tightly locked by the first nut 31. The upper part of the column body 32 is provided with a mounting groove, the compression spring 33 is arranged in the mounting groove. The positioning bead 34 is mounted on the upper end of the compression spring 33. The positioning bead 34 tightly presses against the connecting shaft 2. The diameter of the positioning bead 34 is greater than the depth of the snapping groove 35 on the connecting shaft 2. The left end of the sliding block 5 is provided with a pin 11. A pin poking mechanism is provided corresponding to the pin 11. The pin poking mechanism is not shown in FIG. 1, FIG. 2, or FIG. 8.

[0038] FIG. 4 to FIG. 7 are structural schematic views of applying the above-mentioned cutting device to an integrated paper-plastic bag cutting and sealing machine, where the cutting device 17 is mounted on the horizontal displacement driving mechanism 18, after the horizontal displacement driving mechanism 18 is started, the cutting device 17 cuts the paper-plastic bag material along the X-axis direction, the paper-plastic bag obtained after cutting is driven to enter the sealing device 19 at the right side for sealing along the X-axis direction by the belts of the dual-belt conveying mechanism in the paper feeding device 20. A series of actions of cutting and sealing paper-plastic bag may be realized through the integrated paper-plastic bag cutting and sealing machine.

[0039] In this embodiment:

[0040] The horizontal displacement driving mechanism 18 uses a pulley transmission mechanism, the sliding bracket further includes an upper pressing plate (the structure thereof is shown in FIG. 3). The upper pressing plate is located above the upper plate 1, the upper pressing plate is provided with a mounting groove 12 used to assemble with the transmission belt in the pulley transmission mechanism. The transmission belt is located between the upper pressing plate and the upper plate 1. Fixing member mounting holes 3 corresponding to each other are respectively arranged on the upper pressing plate and the upper plate 1. The fixing member is mounted in the fixing member mounting hole 3. The upper pressing plate is fixedly connected to the upper plate 1, so that the cutting device 17 is driven to move along the X-axis direction through the transmission belt to complete the cutting of the paper-plastic bag. A base plate 22 is mounted behind the pulley transmission mechanism, the base plate 2 is provided with a horizontal sliding groove 23. The back surface of the rear plate 4 of the sliding bracket is provided with a slider 38. The slider 38 is located in the horizontal sliding groove 23 and may slide left and right along the X-axis direction in the horizontal sliding groove 23. The horizontal sliding groove 23 plays a good guiding role for the sliding bracket.

[0041] The pin poking mechanism includes a pin pull plate 21, a cam, a motor 16 and a fixing bracket 15. The motor 16 is mounted on the fixing bracket 15. A cam is mounted on an output shaft of the motor 16. In this embodiment, an eccenter 30 is used as the cam. The pin pull plate 21 is provided with an eccentric hole matching the eccenter 30. The eccenter 30 is assembled in the eccentric hole through the bearing 29. The rotation action of the output shaft of the motor 16 is converted into the forward and backward movement of the pin pull plate 21 along the Y-axis direction by the eccenter 30. A pin inserting slotted hole 27 is arranged at one end of the pin pull plate 21 near the pin 11. The diameter of the pin inserting slotted hole 27 is larger than the diameter of the pin 11. Before the position of the cutting knife 7 is adjusted, the pin 11 on the sliding block 5 needs to be inserted into the pin inserting slotted hole 27 at the front end of the pin pull plate 21, ensuring the cutting knife 7 changes position along with the back and forth movement of the pin pull plate 21. In the abnormal situation, if the pin 11 on the left side of the sliding block 5 is laterally non-coaxial with the pin inserting slotted hole 27 at the front end of the pin pull plate 21, when the sliding bracket moves to the leftmost position, the pin 11 on the sliding block 5 cannot be inserted into the pin inserting slotted hole 27 at the front end of the pin pull plate 21. At this time, motor 16 needs to be started, the pin pull plate 21 is finally driven to move by the motor 16, so that the pin 11 is inserted into the pin inserting slotted hole 27. The front and rear limiting switches 14 are mounted on the fixing bracket 15 along the Y-axis direction, the two limiting switches 14 and the motor 16 are all connected to the control system of the integrated paper-plastic bag cutting and sealing machine. The limiting switch 14 may directly use the conventional contact switch. A groove 26 is formed on the upper surface of the pin pull plate 21. When the pin pull plate 21 moves backward along the Y-axis direction to the rear contact switch, the front contact switch is just located in the groove 26. One end of the spring 28 is fixed on the plate surface of the pin pull plate 21 close to the sliding bracket through the fixing member, the other end of the spring 28 is mounted on a rack of the integrated paper-plastic bag cutting and sealing machine.

[0042] An obliquely upward guiding plate 25 and photoelectric switch 24 are mounted on the rack of the integrated paper-plastic bag cutting and sealing machine. The photoelectric switch 24 is connected to the control system of the integrated paper-plastic bag cutting and sealing machine. The side of the upper pressing plate close to the guiding plate 25 is provided with an external convex plate 13 (the external convex plate 13 may also be arranged on other structures of the sliding bracket, such as the side of the upper plate 1 close to the guiding plate 25). When the sliding block 5 moves upward along the guiding plate 25 to a position that a cutting surface of the cutting knife 7 is higher than a plane of a paper-plastic bag in a paper feeding device 20 of the integrated paper-plastic bag cutting and sealing machine, the photoelectric switch 24 may sense the external convex plate 13. When the integrated paper-plastic bag cutting and sealing machine is merely used for sealing operation, the position of the cutting knife 7 may be moved upwards through this solution, thereby effectively avoid the cutting knife 7 accidentally touching the paper-plastic bag to be sealed and damage to the paper-plastic bag.

[0043] The movement of the cutting knife 7 along three directions of X-axis, Y-axis and Z-axis may be realized through the cutting device 17 described in the present invention.

[0044] (1) Under the driving of the transmission belt of the pulley transmission mechanism, the cutting knife 7 may move left and right along the X-axis direction.

[0045] (2) Under the action of the pin poking mechanism, the cutting knife 7 may move back and forth along the Y-axis direction. The specific process is as follows.

[0046] When the cutting knife 7 needs to be adjusted from the front to the rear (along the Y-axis direction), the sliding bracket is firstly moved to the left side of the pin pull plate 21, the pin 11 on the sliding block 5 is inserted into the pin inserting slotted hole 27 at the front end of the pin pull plate 21. And then the motor 16 is started by the control system, the pin pull plate 21 is driven to move backward by the eccenter 30. When the pin pull plate 21 moves to the most rear, the spring positioning column 10 on the sliding block 5 just reaches the position of the snapping groove 35 at the rear of the connecting shaft 2 and springs into the snapping groove 35. Meanwhile, the rear end of the pin pull plate 21 just reaches the position of the rear limiting switch 14. At this time, the limiting switch 14 transmits the signal to the control system of the integrated paper-plastic bag cutting and sealing machine. The control system stops the motor 16, the sliding block 5 stops moving to achieve the positioning of the cutting knife 7. When the cutting knife 7 is in this position, the cutting device is applied to cut the traditional paper-plastic bag coded on the outside of the sealing position. When the paper-plastic bag to be cut is not required to be coded on the outside of the sealing position, the cutting knife 7 needs to be adjusted from rear to front, the sliding bracket also needs to be moved to the side of the pin pull plate 21 before operation, so that the pin 11 is inserted into the pin inserting slotted hole 27. And then the motor 16 is started to make the pin pull plate 21 move to the forefront. At this time, the spring positioning column 10 on the sliding block 5 springs into the snapping groove 35 in the front part of the connecting shaft 2, meanwhile, the rear end of the pin pull plate 21 just reaches the position of the front limiting switch 14. The control system stops the motor 16, the cutting knife 7 is positioned so that the position of the cutting knife 7 (i.e., the cutting position) advances. The distance between the sealing position on the paper-plastic bag after being cut and the edge of the paper-plastic bag will be reduced, effectively overcoming the problem of the large amount of wasted paper-plastic bag materials caused by the fixed position of the cutting device in the traditional integrated paper-plastic bag cutting and sealing machine, reducing the production cost.

[0047] (3) The cutting knife 7 may move up and down along the Z-axis direction under the action of the obliquely upward guiding plate 25, the specific process is as follows.

[0048] The horizontal displacement driving mechanism 18 is activated by the control system, the whole cutting device 17 is driven to move to the guiding plate 25 along the X-axis direction. When the cutting device reaches the position where the guide plate 25 is located, the sliding block 5 with the roller 6 moves obliquely upward along the guiding plate 25. The position of the cutting knife 7 on the sliding block 5 is raised (moves along the Z-axis direction) so that the cutting surface of the cutting knife 7 is higher than the plane of the paper-plastic bag in the paper feeding device 20. At this time, the photoelectric switch 24 senses the external convex plate 13 and transmits the signal to the control system, the control system stops the movement of the horizontal displacement driving mechanism 18, finally the entire cutting device 17 stops moving. When the cutting device needs to cut the paper-plastic bag material, the control system starts the horizontal displacement driving mechanism 18, the cutting device 17 is driven to move oppositely along the X-axis direction (i.e., the direction away from the guiding plate 25).

[0049] In a practical application, a spring top bead 9 may further be mounted on the top of the sliding block 5. During the movement of the cutting knife 7 along the guiding plate 25, the spring top bead 9 is in a compressed state. When the cutting action needs to be performed by the cutting knife 7, the horizontal displacement driving mechanism 18 is activated by the control system, the whole cutting device 17 is driven to move away from the guiding plate 25 along the X-axis. During the movement, the spring top bead 9 exerts a downward force to the sliding block 5 under the elastic action of its own, so that the sliding block 5 is deflected downwardly around the connecting shaft 2 under the action of the spring top bead 9, the position of the cutting knife 7 is reduced until the cutting knife 7 returns to the initial position (i.e., the position of the cutting knife 7 in the cutting state).