Automatic sheet feeding device

Abstract

The utility model provides an automatic sheet feeding device, which relates to the technical field of sheet conveying, and comprises a rack, a plurality of limiting plates are fixedly arranged on the rack, the plurality of limiting plates jointly define a stock bin, a clearance compensation flexible damper is fixedly arranged on the rack, the clearance compensation flexible damper comprises two clearance compensation flexible brushes, and the two clearance compensation flexible brushes are fixedly arranged on the rack. Bristles on the two gap compensation flexible brushes are horizontally arranged and stretch into the stock bin to be used for supporting the composite sheet, each gap compensation flexible brush is provided with a gravity compensation cavity, the stock bin is provided with a sheet feeding port and a sheet taking port, a blocking assembly is arranged at the sheet taking port, a taking and feeding mechanism is arranged below the stock bin, and a discharging port is arranged below the stock bin. According to the utility model, through the arrangement of the two gap compensation flexible brushes, the gap compensation is carried out on the composite sheets in the stock bin, the displacement gap of the composite sheets is eliminated, and the technical problem that the composite sheets are staggered in the stock bin is ingeniously solved by utilizing the soft characteristics of the gap compensation brushes.

Description

Technical Field

[0001] The utility model relates to the technical field of sheet conveying, in particular to an automatic sheet feeding device. Background Art

[0002] In the process of sheet processing, in order to improve production efficiency, sheets need to be stacked in a storage bin, and then an automatic sheet feeding is realized through a sheet taking mechanism. At present, the composite sheet used for a band-aid consists of a bottom layer 1, an intermediate layer 2 and two release layers 3. The intermediate layer 2 is strip-shaped and pasted at the middle position of the top surface of the bottom layer 1. The two release layers 3 are pasted on both sides of the top surface of the bottom layer 1. The ends of the two release layers 3 close to the intermediate layer 2 both extend towards the intermediate layer 2 and cross-cover the intermediate layer 2 up and down, making the middle position of the composite sheet thick and the soft edge positions on both sides thin. When the composite sheets are stacked, there will inevitably be a placement gap 4 in the vertical direction between adjacent composite sheets, causing the soft edges on both sides to bend, and further resulting in a horizontal displacement gap 5 for the composite sheets. The displacement gap 5 causes the stacked composite sheets to be misaligned in the horizontal direction. At the same time, the self-weight of the middle of the composite sheet is greater than that of both sides. Under the action of gravity, the composite sheet will bend downward in the middle. When a large number of composite sheets with bent middles are put into the storage bin, the stacked composite sheets will be misaligned in the storage bin, and it is impossible to ensure that the composite sheets are neatly stacked in the storage bin, resulting in the adsorbed composite sheets by the sheet taking device being skewed, and the original positions of each composite sheet being different, which affects the subsequent processing accuracy of the composite sheets and the consistency of the products.

[0003] Therefore, an automatic sheet feeding device for solving the above problems is needed. Summary of the Utility Model

[0004] The utility model provides an automatic sheet feeding device. Through the arrangement of two gap compensation flexible brushes, gap compensation is carried out on the composite sheets in the stacking bin, eliminating the displacement gap of the composite sheets. By utilizing the soft characteristics of the gap compensation brushes, the technical problem of misalignment of such composite sheets in the storage bin is ingeniously solved.

[0005] The technical solution of the utility model is realized as follows:

[0006] The automatic sheet feeding device comprises a frame, on which are fixedly mounted a plurality of limit plates for limiting the position of composite sheets, each of the limit plates being vertically arranged, and the plurality of limit plates together form a silo for stacking the composite sheets, and the frame is fixedly mounted with a gap compensation flexible damper, the gap compensation flexible damper comprising two relatively arranged gap compensation flexible brushes, the bristles on the two gap compensation flexible brushes being horizontally arranged and extending into the silo for supporting the composite sheets, each of the gap compensation flexible brushes being provided with a gravity compensation cavity for avoiding the thicker position in the middle of the composite sheet, and each of the gravity compensation cavity extending in a vertical direction, a sheet discharge port being provided at the top of the silo, a sheet picking port being provided at the bottom of the silo, a blocking component for preventing the composite sheets from automatically falling at the sheet picking port, and a picking and discharging mechanism being provided below the silo.

[0007] As a preferred technical solution, the material picking and releasing mechanism includes a sliding seat slidably installed on the frame along the vertical direction, the sliding seat is transmission-connected with a linear drive mechanism, a horizontally arranged rotating shaft is rotatably installed on the sliding seat, a material picking assembly is provided at one end of the rotating shaft, a connecting arm is fixedly installed at the other end of the rotating shaft, a cam follower is rotatably installed at the free end of the connecting arm, the axis of the cam follower is arranged parallel to the rotating shaft and is not coaxial, a mounting plate is fixedly installed on the frame, a guide groove is arranged on the mounting plate, the cam follower is constrained and installed in the guide groove, and the guide groove includes an upper linear groove, a middle flip groove and a lower linear groove which are continuously arranged together.

[0008] As a preferred technical solution, the middle flip groove includes a first flip arc groove, an intermediate connecting groove and a second flip arc groove which are continuously arranged together, and the first flip arc groove and the second flip arc groove are symmetrically arranged.

[0009] As a preferred technical solution, a tension spring for pulling the cam follower toward the middle flip groove is provided between the sliding seat and the connecting arm.

[0010] As a preferred technical solution, the material picking assembly includes a material picking seat fixedly mounted on the rotating shaft, and at least one vertically arranged suction pipe is fixedly mounted on the material picking seat, and the lower end of the suction pipe is connected to a suction cup for sucking the composite sheet at the sheet material picking port position, and the suction pipe is connected to an air pump.

[0011] As a preferred technical solution, the blocking assembly includes a plurality of ball head screws installed at the sheet material feeding port.

[0012] By adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0013] Since the sheet automatic feeding device includes a silo, during the use of the device, several neatly stacked composite sheets are placed in the silo, such that the two ends of the middle layer on the composite sheet are respectively located at the gravity compensation cavities. The stacked composite sheets will move towards the bottom of the silo due to gravity. During this process, the limiting plate limits the composite sheets. The setting of the gravity compensation cavities on the gap compensation flexible brush enables the two end faces of the middle material on the composite sheet not to be blocked by the gap compensation flexible brush, allowing the composite sheet to move downward more smoothly. The bristles on the gap compensation flexible brush can be inserted between the stacked composite sheets to separate the multiple stacked composite sheets. The brush plays a role in separating materials, ensuring single-sheet material picking of the material picking and placing mechanism. At the same time, it supports the soft edges on both sides of the composite sheet, preventing the bending of the soft edges on both sides caused by the self-weight in the middle and the placement gap, thereby eliminating the displacement gap and avoiding the misalignment of the composite sheet. In the present utility model, through the setting of two gap compensation flexible brushes, gap compensation is performed on the composite sheets in the silo, eliminating the displacement gap of the composite sheets. Utilizing the soft characteristics of the gap compensation brush, the technical problem of misalignment of such composite sheets in the silo is ingeniously solved, ensuring that the original positions of the composite sheets are the same, and guaranteeing the processing accuracy of subsequent composite sheets and the consistency of the products.

[0014] Since the sheet automatic feeding device includes a material picking and placing mechanism, the composite sheet at the sheet material picking opening position is balanced by the blocking of the blocking component, the support of the bristles, and its own gravity, making the composite sheet flat at the material picking opening. When the composite sheet at the material picking opening position is adsorbed and taken away, the upper composite sheet will move downward due to its own weight. During the downward movement, the composite sheet will bend. When it moves to the material picking opening position, the composite sheet will be supported by the bristles and blocked by the blocking component, making the composite sheet in a flat state, enabling the suction cup to better suck the composite sheet.

[0015] Since the sheet automatic feeding device includes a picking and placing mechanism, during the use of this device, the sliding seat is lifted through the linear driving mechanism. During the lifting process of the sliding seat, when the cam follower passes through the middle flipping groove, the picking seat rotates 180 degrees, the suction cup rotates above the picking seat, and continues to rise in the upper linear groove. After the suction cup adsorbs the composite sheet, the sliding seat descends, and the composite sheet is pulled out from the material bin at the suction cup. When the cam follower passes through the middle flipping groove, the picking seat rotates 180 degrees, the suction cup resets, and the air pump stops working. The composite sheet is placed at the required position, that is, a picking and placing action of the composite sheet is completed. Repeating this process can achieve the automatic feeding of the composite sheet. In this utility model, through the cooperation of the flipping guide groove and the cam follower, the lifting and flipping of the picking seat are completed by a set of power driving mechanisms. Compared with the existing method of using a robotic arm for picking and placing materials, this picking and placing mechanism is placed below the material bin, with a compact structure and small occupied space. After being integrally installed with the composite sheet production equipment, the volume of the composite sheet production equipment is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is Figure 1 a bottom view of;

[0019] Figure 3 is a structural schematic diagram of the sliding seat;

[0020] Figure 4 is a structural schematic diagram of the guide groove;

[0021] Figure 5 is a state reference diagram of the stacked composite sheets;

[0022] Figure 6 is a state reference diagram of the composite sheet supported by the bristles.

[0023] Wherein: 1. bottom layer; 2. middle layer; 3. peeling layer; 4. placing gap; 5. displacement gap; 6. frame; 7. limit plate; 8. magazine; 9. gap compensation flexible brush; 10. bristles; 11. gravity compensation cavity; 12. sheet feeding opening; 13. sheet taking opening; 14. sliding seat; 15. rotating shaft; 16. connecting arm; 17. cam follower; 18. mounting plate; 19. upper straight groove; 20. middle turning groove; 21. lower straight groove; 22. first turning arc groove; 23. middle connecting groove; 24. second turning arc groove; 25. tension spring; 26. sheet taking seat; 27. suction pipe; 28. suction cup; 29. ball head setscrew; 30. slide rail; 31. slider; 32. rodless cylinder. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1-6 Collectively shown, the automatic sheet feeding device includes a frame 6. A plurality of limit plates 7 for limiting the composite sheet are fixedly installed on the frame 6. Each limit plate 7 is vertically arranged. The plurality of limit plates 7 together enclose a magazine 8 for stacking the composite sheets. A gap compensation flexible damper is fixedly installed on the frame 6. The gap compensation flexible damper includes two relatively arranged gap compensation flexible brushes 9. The bristles 10 on the two gap compensation flexible brushes 9 are all horizontally arranged and extend into the magazine 8 to support the composite sheet. Each gap compensation flexible brush 9 is provided with a gravity compensation cavity 11 for avoiding the relatively thick middle position of the composite sheet. Each gravity compensation cavity 11 extends in the vertical direction. A sheet feeding opening 12 is provided at the top of the magazine 8, and a sheet taking opening 13 is provided at the bottom of the magazine 8. A blocking assembly for preventing the automatic falling of the composite sheet is arranged at the sheet taking opening 13. A sheet taking and placing mechanism is arranged below the magazine 8.

[0026] Among them, the loading and unloading mechanism includes a sliding seat 14 slidably mounted on the frame 6 in the vertical direction. The sliding seat 14 is drivingly connected to a linear driving mechanism. A horizontally arranged rotating shaft 15 is rotatably mounted on the sliding seat 14. A material taking assembly is arranged at one end of the rotating shaft 15. A connecting arm 16 is fixedly installed at the other end of the rotating shaft 15. A cam follower 17 is rotatably installed at the free end of the connecting arm 16. The axis of the cam follower 17 is parallel to but not coaxial with the rotating shaft 15. A mounting plate 18 is fixedly installed on the frame 6. A guiding groove is arranged on the mounting plate 18. The cam follower 17 is constrained and installed in the guiding groove. The guiding groove includes an upper linear groove 19, a middle turning groove 20 and a lower linear groove 21 which are continuously arranged together.

[0027] And, the middle turning groove 20 includes a first turning arc groove 22, an intermediate connecting groove 23 and a second turning arc groove 24 which are continuously arranged together. The first turning arc groove 22 and the second turning arc groove 24 are symmetrically arranged.

[0028] In addition, a tension spring 25 for pulling the cam follower 17 towards the middle turning groove 20 is arranged between the sliding seat 14 and the connecting arm 16.

[0029] Secondly, as Figure 3 shown, the material taking assembly includes a material taking seat 26 fixedly installed on the rotating shaft 15. At least one vertically arranged suction pipe 27 is fixedly installed on the material taking seat 26. A suction cup 28 for sucking the composite sheet at the position of the sheet material taking port 13 is connected to the lower end of the suction pipe 27. The suction pipe 27 is connected to an air pump, and the air pump is not marked in the figure.

[0030] As Figure 2 shown, the blocking assembly includes a number of ball head set screws 29 installed at the sheet material taking port 13.

[0031] A vertically arranged slide rail 30 is fixedly installed on the frame 6. A slider 31 is slidably mounted on the slide rail 30. The slider 31 is fixedly installed on the sliding seat 14. The linear driving mechanism includes a vertically arranged rodless cylinder 32. The sliding seat 14 is fixedly connected to the body of the rodless cylinder 32.

[0032] The using method of the utility model is as follows:

[0033] In the first step, a number of stacked composite sheets are placed in the material bin 8, so that both ends of the middle layer of the composite sheet are respectively located at the gravity compensation cavities 11.

[0034] In the second step, the stacked composite sheets will move towards the bottom of the material bin 8 due to gravity and are limited by the ball head set screws 29 at the sheet material taking port 13. During this process, the bristles 10 extend into the stacked composite sheets to support the two side soft edges of the composite sheet.

[0035] In the third step, driven by the rodless cylinder 32, the sliding seat 14 moves upward. When the cam follower 17 passes through the middle turning groove 20, the material taking seat 26 rotates 180 degrees, and the suction cup 28 rotates above the material taking seat 26. The suction cup 28 adsorbs the composite sheet at the position of the sheet material taking port 13, realizing the material taking of the composite sheet.

[0036] In the fourth step, driven by the rodless cylinder 32, the sliding seat 14 moves downward, and the composite sheet is adsorbed by the suction cup 28 and moves downward, being pulled out from the storage bin 8. When the cam follower 17 passes through the middle turning groove 20, the material taking seat 26 rotates 180 degrees, and the suction cup 28 rotates below the material taking seat 26. The air pump stops working, and the composite sheet is placed at a proper position, thus completing the discharging of the composite sheet. By repeating this process, the automatic feeding of the composite sheet can be realized.

[0037] In summary, through the arrangement of two clearance compensation flexible brushes, the present utility model performs clearance compensation on the composite sheet in the stacking bin, eliminates the displacement clearance of the composite sheet, and skillfully solves the technical problem of dislocation of such composite sheets in the bin by utilizing the soft characteristics of the clearance compensation brush.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Automatic sheet feeding device, including a frame, characterized in that, A plurality of limit plates for limiting the position of the composite sheets are fixedly mounted on the frame, each of the limit plates is vertically arranged, and the plurality of limit plates together form a silo for stacking the composite sheets, and a gap compensation flexible damper is fixedly mounted on the frame, and the gap compensation flexible damper comprises two relatively arranged gap compensation flexible brushes, and the bristles on the two gap compensation flexible brushes are horizontally arranged and extend into the silo for supporting the composite sheet, and each of the gap compensation flexible brushes is provided with a gravity compensation cavity for avoiding the thicker position in the middle of the composite sheet, and each of the gravity compensation cavity extends in a vertical direction, and a sheet discharge port is provided at the top of the silo, and a sheet material taking port is provided at the bottom of the silo, and a blocking component for preventing the composite sheet from automatically falling is provided at the sheet material taking port, and a material taking and discharging mechanism is provided below the silo.

2. The automatic sheet feeding device according to claim 1, characterized in that, The material picking and releasing mechanism includes a sliding seat slidably installed on the frame along the vertical direction, the sliding seat is transmission-connected with a linear drive mechanism, a horizontally arranged rotating shaft is rotatably installed on the sliding seat, a material picking assembly is provided at one end of the rotating shaft, a connecting arm is fixedly installed at the other end of the rotating shaft, a cam follower is rotatably installed on the free end of the connecting arm, the axis of the cam follower is arranged parallel to the rotating shaft and is not coaxial, a mounting plate is fixedly installed on the frame, a guide groove is arranged on the mounting plate, the cam follower is constrained and installed in the guide groove, and the guide groove includes an upper linear groove, a middle flip groove and a lower linear groove which are continuously arranged together.

3. The automatic sheet feeding device according to claim 2, characterized in that, The middle flip groove comprises a first flip arc groove, a middle connecting groove and a second flip arc groove which are continuously arranged together, and the first flip arc groove and the second flip arc groove are symmetrically arranged.

4. The automatic sheet feeding device according to claim 3, characterized in that, A tension spring for pulling the cam follower toward the middle flip groove is arranged between the sliding seat and the connecting arm.

5. The automatic sheet feeding device according to claim 2, characterized in that, The material picking assembly includes a material picking seat fixedly mounted on the rotating shaft, and at least one vertically arranged suction pipe is fixedly mounted on the material picking seat. The lower end of the suction pipe is connected to a suction cup for sucking the composite sheet at the sheet material picking port position, and the suction pipe is connected to an air pump.

6. The automatic sheet feeding device according to claim 1, characterized in that, The blocking assembly includes a plurality of ball head screws installed at the sheet material taking port.

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