A paper pressing device for a film cutting machine

Abstract

This invention relates to a paper pressing device for a film cutting machine, comprising a frame, a support frame, a driver, a connecting rod, and a paper pressing assembly. The connecting rod rotates with the power output end of the driver. The paper pressing assembly includes a pressing element, a torsion spring, a connecting element, and a pressure roller. One end of the pressing element is connected to the connecting rod so that the pressing element rotates with the connecting rod. The connecting element is rotatably connected to the pressing element, and the torsion spring is disposed between the connecting element and the pressing element. The pressure roller is rotatably connected to the connecting element so that the pressure roller slides on the film paper and is then abutted by the pressing element. In this paper pressing device for a film cutting machine, the pressing element in the paper pressing assembly, driven by the driver, can quickly abut against the film paper, causing the pressure roller to roll downwards against the film paper. When the connecting element elastically rotates relative to the pressing element, the pressing element becomes flush with the pressure roller, thus fixing the film paper against the pressing element. When the driver rotates in the opposite direction, the pressing element can quickly release the film paper, achieving efficient and high-quality cutting of the film paper.

Description

Technical Field

[0001] This invention relates to the technical field of plastic film manufacturing, and more particularly to a paper pressing device for a film cutting machine. Background Technology

[0002] In existing technology, film cutting machines are used to cut film paper so that it can be used to package products. With the improvement of social productivity, the requirements for product production efficiency are also increasing. Consequently, higher requirements are also placed on film cutting machines, which need to improve both the quality and efficiency of film cutting. In the past, it was difficult to achieve both high efficiency and high quality film cutting. Increasing film cutting efficiency often leads to an increase in the scrap rate of film paper. To avoid the scrap rate of film paper, manufacturers often reduce the film cutting efficiency to avoid expensive machine maintenance costs. However, in order to improve production efficiency, factories generally solve this problem by using multiple film cutting machines.

[0003] To better address the issue of improving the efficiency and capacity of film cutting machines, a paper pressing device is needed to achieve rapid pressing and releasing of film paper, thereby resolving the technical problem of the relative contradiction between film cutting efficiency and film cutting quality in film cutting machines. Summary of the Invention

[0004] The purpose of this invention is to provide a paper pressing device for a film cutting machine, which aims to solve the technical problem of the contradiction between film cutting efficiency and film cutting quality in film cutting machines.

[0005] To solve the above-mentioned technical problems, a paper pressing device for a film cutting machine is provided, including a frame, a support frame, a driver, a connecting rod, and a paper pressing assembly; the support frame is disposed on one side of the frame; the driver is mounted on the support frame, and the power output end of the driver faces the frame; one end of the connecting rod passes through the frame and the support frame and is connected to the output end of the driver, so that the connecting rod rotates with the power output end of the driver; the paper pressing assembly includes a pressing member, a torsion spring, an adapter, and a pressure roller; one end of the pressing member is connected to the connecting rod, so that the pressing member rotates with the connecting rod; the adapter is rotatably connected to the pressing member, and the torsion spring is disposed between the adapter and the pressing member; the pressure roller is rotatably connected to the adapter, so that the pressure roller slides on the film paper and is abutted by the pressing member.

[0006] Furthermore, the adapter includes a clearance groove and a connecting hole. The clearance groove is used to house the torsion spring, and the end of the torsion spring is inserted into the connecting hole. The pressing member is provided with a limiting groove, which is perpendicular to the film paper, and the adapter is slidably connected to the limiting groove.

[0007] Furthermore, the pressing member has a V-shape at both ends relative to the film paper plane, wherein the included angle between the front and rear ends of the pressing member is denoted as a, and satisfies the relationship: 120°≤a≤150°.

[0008] Furthermore, at least two of the paper pressing assemblies are spaced apart along the axial direction of the connecting rod.

[0009] Furthermore, the paper pressing device for the film cutting machine also includes a side plate and a rocker arm. The side plate is connected to the frame, and the support frame is detachably connected to the side plate. The side plate has a circular hole and an arc-shaped hole around the circular hole. The circular hole is used to avoid the connection between the driver output end and the connecting rod, and the arc-shaped hole is used for the rocker arm to slide. One end of the rocker arm is fixed to the connecting rod.

[0010] Furthermore, the rocker arm includes a fixed part and a sliding part. The fixed part has a limiting hole facing the connecting rod and a threaded hole on the axis perpendicular to the limiting hole. The sliding part is adapted to slide and connect to the arc-shaped hole away from the connecting rod.

[0011] Furthermore, the paper pressing device for the film cutting machine also includes a limit switch, which is fixed to the side plate and disposed near one end of the arc-shaped hole. When the sliding part reaches the end of the arc-shaped hole, the limit switch is triggered by the sliding part to stop the driver from driving.

[0012] Furthermore, the driver includes a drive source and a flange bearing, the flange bearing being disposed in the circular hole, the drive source being fixed to the side plate, wherein the output shaft of the drive source is connected to the connecting rod through the flange bearing.

[0013] Furthermore, the paper pressing device for the film cutting machine also includes a housing, a switch, and a controller. The housing is located on the outside of the frame, and the switch is provided on the housing. The controller is electrically connected to the switch, the limit switch, and the driver, respectively.

[0014] Furthermore, the paper pressing device can be detachably installed on the film cutting machine.

[0015] Implementing the embodiments of the present invention will have the following beneficial effects:

[0016] In this embodiment, the paper pressing device for the film cutting machine allows the pressing component in the paper pressing assembly to quickly abut against the film paper after being driven by the driver. This causes the pressure roller to roll downwards onto the film paper. Under the reaction force of the flat plate at the bottom of the film paper, the adapter rotates elastically relative to the pressing component, and the pressing component becomes flush with the pressure roller. Consequently, the film paper is abutted and fixed by the pressing component. When the driver rotates in the opposite direction, the pressing component can quickly release the film paper, achieving efficient and high-quality cutting of the film paper. This overcomes the technical problem of the relative contradiction between cutting efficiency and cutting quality in existing film cutting machines. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the paper pressing device according to an embodiment of the present invention;

[0019] Figure 2 This is a first-view structural diagram of the paper pressing device removing the machine casing according to an embodiment of the present invention;

[0020] Figure 3 This is a second-view structural diagram of the paper pressing device removing the machine casing according to an embodiment of the present invention;

[0021] Figure 4 This is a third-view structural diagram of the paper pressing device removing the machine casing according to an embodiment of the present invention;

[0022] Figure 5 This is a top view of the paper pressing device according to an embodiment of the present invention with the casing removed;

[0023] Figure 6 for Figure 5 Sectional view at point AA;

[0024] Figure 7 This is a schematic diagram of the paper pressing assembly described in an embodiment of the present invention;

[0025] Figure 8 This is an exploded view of the paper pressing assembly described in an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the side plate structure according to an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the structure of the adapter described in an embodiment of the present invention;

[0028] Figure 11 This is a schematic diagram of the rocker arm described in an embodiment of the present invention;

[0029] Figure 12 This is a schematic diagram of the pressing component according to an embodiment of the present invention.

[0030] The components are as follows: 10. Film cutter; 100. Paper pressing device; 110. Frame; 120. Support frame; 130. Driver; 131. Drive source; 132. Flange bearing; 140. Connecting rod; 150. Paper pressing assembly; 151. Pressing component; 1511. Limiting groove; 152. Torsion spring; 153. Adapter; 1531. Clearance groove; 1532. Connecting hole; 154. Pressure roller; 155. Side plate; 1551. Circular hole; 1552. Arc hole; 156. Rocker arm; 1561. Fixing part; 15611. Limiting hole; 15612. Threaded hole; 1562. Sliding part; 160. Limit switch; 170. Housing; 180. Switch; 190. Controller. Detailed Implementation

[0031] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0032] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Please refer to Figures 1-12This invention provides a paper pressing device 100 for a film cutting machine 10, including a frame 110, a support frame 120, a driver 130, a connecting rod 140, and a paper pressing assembly 150. The support frame 120 is disposed on one side of the frame 110. The driver 130 is mounted on the support frame 120, and the power output end of the driver 130 faces the frame 110. One end of the connecting rod 140 passes through the frame 110 and the support frame 120 and is connected to the output end of the driver 130, so that the connecting rod 140 moves with the driver. The power output end of the device 130 rotates; the paper pressing assembly 150 includes a pressing member 151, a torsion spring 152, an adapter 153 and a pressure roller 154. One end of the pressing member 151 is connected to the connecting rod 140 so that the pressing member 151 rotates with the connecting rod 140. The adapter 153 is rotatably connected to the pressing member 151, and the torsion spring 152 is located between the adapter 153 and the pressing member 151. The pressure roller 154 is rotatably connected to the adapter 153 so that the pressure roller 154 slides on the film paper and is abutted by the pressing member 151. In specific applications, when the driver 130 drives the connecting rod 140 to rotate forward, the pressing member 151 rotates forward along with the connecting rod 140. After the pressing member 151 rotates a certain angle, the pressure roller 154 begins to abut against the film paper. As the pressing member 151 continues to rotate, the pressure roller 154 slides against the film paper. Simultaneously, since the pressure roller 154 is rotatably connected to the adapter 153, and the adapter 153 is rotatably connected to the pressing member 151, the torsion spring 152 abuts against the adapter 153 and the pressing member 151 and undergoes elastic deformation. This causes the pressure roller 154 to elastically rotate under the reverse force of the support plate at the bottom of the film paper. When the pressing element 151 continues to rotate in the forward direction, it will be flush with the pressure roller 154 and abut against the film paper, so that the pressing element 151 presses the film paper, making it easier for the film cutter 10 to cut the film paper. It is worth noting that the driver 130 drives the connecting rod 140 to rotate normally until the pressing element 151 presses the film paper, which is completed quickly. Then, after the film cutter 10 finishes cutting, the driver 130 drives the connecting rod 140 to rotate in the reverse direction, so that the pressing element 151 releases the film paper, waits for the film paper to be fed, and then repeats the above operation, so that the film cutter 10 can cut the film paper efficiently and with high quality.

[0035] In one possible implementation, the adapter 153 includes a clearance groove 1531 and a connecting hole 1532. The clearance groove 1531 is used to place the torsion spring 152. The end of the torsion spring 152 is inserted into the connecting hole 1532. The pressing member 151 is provided with a limiting groove 1511. The limiting groove 1511 is perpendicular to the film paper, and the adapter 153 is slidably connected to the limiting groove 1511. In specific applications, to prevent the paper pressing assembly 150 from malfunctioning during operation, especially due to the high efficiency required in high-speed film cutting, the adapter 153 is provided with a relief groove 1531 and a connecting hole 1532. The relief groove 1531 is used to house the torsion spring 152 to prevent the torsion spring 152 from getting stuck during elastic deformation. The two ends of the torsion spring 152 are inserted and locked into the connecting hole 1532 to prevent the torsion spring 152 from accidentally falling off. In addition, the pressing member 151 is provided with a limiting groove 1511, which allows the adapter 153 to be displaced and deformed relative to the limiting groove 1511, thus preventing the adapter 153 from falling off.

[0036] In one possible implementation, the pressing member 151 is V-shaped at both ends relative to the film paper plane, wherein the included angle between the front and rear ends of the pressing member 151 is denoted as 'a', satisfying the relationship: 120°≤a≤150°. In specific applications, since the pressing member 151 needs to rotate, in its non-working state, the pressing member 151 is set in a positive V-shape. When rotating in the forward direction, when the pressing member 151 abuts against and presses the film paper, the front end of the pressing member 151 needs to press the film paper. At this time, the pressing member 151 is set in an inclined V-shape, with the front end of the pressing member 151 flush with the film paper. It is worth noting that the included angle between the front and rear ends of the pressing member 151 satisfies the range: 120°≤a≤150°. Because the included angle between the front and rear ends of the pressing member 151 is too small, it is prone to problems under repeated stress and stress concentration. Cracks can affect the normal service life of the pressing component 151 and make later maintenance difficult. Therefore, the included angle between the front and rear ends of the pressing component 151 should not be less than 120°. In addition, if the included angle between the front and rear ends of the pressing component 151 is too large, the rear end of the pressing component 151 that rotates in the opposite direction after the film paper is released may accidentally scratch the next film paper, thus increasing the scrap rate. Therefore, the included angle between the front and rear ends of the pressing component 151 should not be greater than 150°. As a preferred option, the included angle α between the front and rear ends of the pressing component 151 selected in this case is 140°.

[0037] In one possible implementation, at least two paper pressing assemblies 150 are spaced apart along the axial direction of the connecting rod 140. In specific applications, to further improve the quality of the finished cut when the film paper is cut by the film cutter 10, at least two sets of paper pressing assemblies 150 can be spaced apart along the axial direction of the connecting rod 140 to press the film paper, making the film paper pressed more evenly and preventing uneven quality caused by warping during cutting. Preferably, this invention uses three sets of paper pressing assemblies 150 spaced apart along the axial direction of the connecting rod 140 to press the film paper, making the film paper pressed more evenly.

[0038] In one possible implementation, the paper pressing device 100 for the film cutting machine 10 further includes a side plate 155 and a rocker arm 156. The side plate 155 is connected to the frame 110, and the support frame 120 is detachably connected to the side plate 155. The side plate 155 has a circular hole 1551 and an arc-shaped hole 1552 around the circular hole 1551. The circular hole 1551 is used to avoid the connection between the output end of the driver 130 and the connecting rod 140. The arc-shaped hole 1552 is used for the rocker arm 156 to slide. One end of the rocker arm 156 is fixed to the connecting rod 140. In specific applications, when the driver 130 drives the connecting rod 140 to rotate in the forward direction, the rocker arm 156 will rotate in the forward direction along with the connecting rod 140, causing the rocker arm 156 to slide in the arc-shaped hole 1552. When the driver 130 drives the connecting rod 140 to rotate in the reverse direction, the rocker arm 156 will rotate in the reverse direction along with the connecting rod 140, thereby resetting and sliding in the arc-shaped hole 1552. This can limit the stroke range of the driver 130 and prevent the pressing force of the pressing member 151 from being too large and damaging the film paper.

[0039] In one possible implementation, the rocker arm 156 includes a fixed portion 1561 and a sliding portion 1562. The fixed portion 1561 has a limiting hole 15611 facing the connecting rod 140 and a threaded hole 15612 on the axis of the vertical limiting hole 15611. The sliding portion 1562 is slidably connected to the arc-shaped hole 1552 away from the connecting rod 140. In specific applications, in order to more reliably fix the rocker arm 156 on the connecting rod 140 and allow it to move in the arc-shaped hole 1552, a limiting hole 15611 is provided on the fixed portion 1561 of the rocker arm 156. The limiting hole 15611 is currently fitted to the connecting rod 140. Preferably, the end shapes of the limiting hole 15611 and the connecting rod 140 are both square. This can prevent relative rotation between the connecting rod 140 and the limiting hole 15611. To prevent the connection between the fixed portion 1561 and the connecting rod 140... To prevent instability, a threaded hole 15612 is provided on the axis of the vertical limiting hole 15611 on one side of the fixing part 1561. This allows the connecting rod 140 to be fixed to the fixing part 1561 at the threaded hole 15612 when it is inserted into the limiting hole 15611. In addition, in order to allow the sliding part 1562 to slide smoothly in the arc-shaped hole 1552, the sliding part 1562 is also set to be arc-shaped, and the curvature of the sliding part 1562 is the same as the curvature of the arc-shaped hole 1552 under ideal conditions.

[0040] In one possible implementation, the paper pressing device 100 for the film cutting machine 10 further includes a limit switch 160. The limit switch 160 is fixed to the side plate 155 and is located at one end near the arc-shaped hole 1552. When the sliding part 1562 reaches the end of the arc-shaped hole 1552, the limit switch 160 is triggered by the sliding part 1562, thereby stopping the drive of the driver 130. In specific applications, in order to automatically control the stopping of the paper pressing device 100 and prevent the pressing force of the pressing member 151 from being too large and damaging the film paper, a limit switch 160 is provided at the end of the side plate 155 near the arc-shaped hole 1552. When the sliding part 1562 reaches the end of the arc-shaped hole 1552, the limit switch 160 is triggered by the sliding part 1562. The limit switch 160 generates a signal to stop the drive of the driver 130 through the controller 190. When the sliding part 1562 leaves the end of the arc-shaped hole 1552, the limit switch 160 resets.

[0041] In one possible implementation, the actuator 130 includes a drive source 131 and a flange bearing 132. The flange bearing 132 is disposed in a circular hole 1551, and the drive source 131 is fixed to the side plate 155. The output shaft of the drive source 131 is connected to the connecting rod 140 through the flange bearing 132. In specific applications, in order to make the rotation of the connecting rod 140 driven by the actuator 130 smoother and improve the control accuracy of the pressing element 151, the actuator 130 includes a drive source 131 and a flange bearing 132, wherein the output shaft of the drive source 131 is connected to the connecting rod 140 through the flange bearing 132.

[0042] In one possible implementation, the paper pressing device 100 for the film cutting machine 10 further includes a housing 170, a switch 180, and a controller 190. The housing 170 is located outside the frame 110, and the switch 180 is mounted on the housing 170. The controller 190 is electrically connected to the switch 180, the limit switch 160, and the driver 130. In specific applications, the operator can activate the switch 180. After receiving the electrical signal from the switch 180, the controller 190 controls the driver 130 to operate. When the limit switch 160 is touched, the controller 190 receives the signal from the limit switch 160 and controls the driver 130 to stop operating.

[0043] In one possible implementation, the paper pressing device 100 is detachably mounted on the film cutting machine 10. In specific applications, in order to facilitate the use of the paper pressing device 100 in the film cutting machine 10, the paper pressing device 100 is detachably mounted on the film cutting machine 10 by means of threaded fasteners. Of course, the paper pressing device 100 and the film cutting machine 10 can also be integrated into one unit.

[0044] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A paper pressing device for a film cutting machine, characterized in that, include: frame; A support frame, wherein the support frame is disposed on one side of the frame; A driver, which is mounted on the support frame and has its power output end facing the frame; A connecting rod, one end of which passes through the frame and the support frame and is connected to the output end of the driver, so that the connecting rod rotates with the power output end of the driver; A paper pressing assembly includes a pressing member, a torsion spring, an adapter, and a pressure roller. One end of the pressing member is connected to the connecting rod so that the pressing member rotates with the connecting rod. The adapter is rotatably connected to the pressing member, and the torsion spring is disposed between the adapter and the pressing member. The pressure roller is rotatably connected to the adapter so that the pressure roller slides on the film paper and is abutted by the pressing member. The pressing component is provided with a limiting groove, which is perpendicular to the film paper. The sliding entrance of the limiting groove is oriented towards the film paper, and the adapter is slidably connected to the limiting groove, so that the adapter is prevented from falling off when it is displaced and deformed relative to the limiting groove. When the driver drives the connecting rod to rotate forward, the pressing component rotates forward with the connecting rod. After the pressing component rotates to a certain angle, the pressure roller begins to abut against the film paper. As the pressing component continues to rotate, the pressure roller slides against the film paper. At the same time, the torsion spring abuts between the adapter and the pressing component and undergoes elastic deformation, causing the pressure roller to rotate elastically under the reverse force of the support plate at the bottom of the film paper. When the pressing component continues to rotate forward, the pressing component and the pressure roller are flush against the film paper, causing the pressing component to press the film paper tightly. After the film cutting machine completes the cutting, the driver drives the connecting rod to rotate in the reverse direction, causing the pressing component to release the film paper.

2. The paper pressing device for a film cutting machine according to claim 1, characterized in that, The adapter includes a clearance groove and a connecting hole. The clearance groove is used to accommodate the torsion spring, and the end of the torsion spring is inserted into the connecting hole.

3. The paper pressing device for a film cutting machine according to claim 2, characterized in that, The pressing member is V-shaped at both ends relative to the film paper plane, and the included angle between the front and rear ends of the pressing member is denoted as a, which satisfies the relationship: 120°≤a≤150°.

4. The paper pressing device for a film cutting machine according to any one of claims 1 to 3, characterized in that, At least two of the paper pressing assemblies are spaced apart along the axial direction of the connecting rod.

5. The paper pressing device for a film cutting machine according to claim 1, wherein The paper pressing device for the film cutting machine further includes a side plate and a rocker arm. The side plate is connected to the frame, and the support frame is detachably connected to the side plate. The side plate has a circular hole and an arc-shaped hole around the circular hole. The circular hole is used to avoid the connection between the driver output end and the connecting rod, and the arc-shaped hole is used for the rocker arm to slide. One end of the rocker arm is fixed to the connecting rod.

6. The paper pressing device for a film cutting machine according to claim 5, characterized in that, The rocker arm includes a fixed part and a sliding part. The fixed part has a limiting hole facing the connecting rod and a threaded hole on the axis perpendicular to the limiting hole. The sliding part is adapted to slide and connect to the arc-shaped hole away from the connecting rod.

7. The paper pressing device for a film cutting machine according to claim 6, characterized in that, The paper pressing device for the film cutting machine also includes a limit switch. The limit switch is fixed to the side plate and is disposed near one end of the arc-shaped hole. When the sliding part reaches the end of the arc-shaped hole, the limit switch is triggered by the sliding part to stop the driver from driving.

8. The paper pressing device for a film cutting machine according to claim 5, wherein The driver includes a drive source and a flange bearing. The flange bearing is disposed in the circular hole, and the drive source is fixed to the side plate. The output shaft of the drive source is connected to the connecting rod through the flange bearing.

9. The paper pressing device for a film cutting machine according to claim 7, wherein The paper pressing device for the film cutting machine also includes a housing, a switch, and a controller. The housing is located on the outside of the frame, and the switch is provided on the housing. The controller is electrically connected to the switch, the limit switch, and the driver, respectively.

10. The paper pressing device for a film cutting machine according to claim 9, characterized in that, The paper pressing device can be detachably installed on the film cutting machine.

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