Paper tube shifting device

Abstract

The invention relates to a paper tube shifting device. The paper tube shifting device comprises a supporting frame fixedly connected with a wall plate and a conveying assembly installed on the supporting frame. The conveying assembly comprises a synchronous belt assembly, a paper tube pushing mechanism and a guide device; the synchronous belt assembly comprises a driving wheel, a driven wheel, a synchronous belt and a synchronous belt tightness adjusting device; the synchronous belt tightness adjusting device comprises an adjusting block and an adjusting bolt; the paper tube pushing mechanism comprises a sliding plate, an air cylinder, a shifting handle support and a shifting handle. The shifting handle is used for pushing paper tubes; the guide device comprises a slideway fixedly connected with the supporting frame and a third sliding block fixedly connected with the sliding plate, and the third sliding block is in sliding connection with the slideway; the synchronous belt assembly further comprises a speed reducer used for driving the driving wheel to rotate. The driving wheel is in transmission connection with the speed reducer; the paper tube feeding device has the beneficial effects that the synchronous belt, the shifting handle and the guide device are arranged, the synchronous belt drives the shifting handle to shift and feed paper tubes, a rodless air cylinder is replaced for pushing the paper tubes, and the fault rate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of paper feeding tubes for winding machines, in particular to a paper feeding tube device. Background Art

[0002] At present, our company's winder uses a rodless cylinder to push the paper tube when sending it to the air expansion shaft. Due to unstable air pressure or cylinder wear, there is a problem that the cylinder cannot push the paper tube into place, which needs to be solved.

[0003] Our company's earlier patent, application number 202111440537.6, is titled "An automatic winding and transfer device"; it discloses the loading and conveying of paper tubes, but does not disclose in detail how to deliver the paper tubes. In fact, a rodless cylinder is used to drive the lever to deliver the paper tubes, which has the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to provide a paper tube shifting device which adopts a mechanical structure to replace the original cylinder tube shifting device and reduce failures.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A paper tube pushing device comprises a support frame fixedly connected to a wall panel and a conveying assembly installed on the support frame; the conveying assembly comprises a synchronous belt assembly for providing power for pushing the paper tube, a paper tube pushing mechanism installed on the synchronous belt assembly, and a guide device installed between the paper tube pushing mechanism and the support frame.

[0007] Furthermore, the synchronous belt assembly includes a driving wheel support frame fixedly connected to one end of the support frame, a driving wheel rotatably connected to the driving wheel support frame, a passive wheel support frame arranged at the other end of the support frame, a passive wheel rotatably connected to the passive wheel support frame, and a synchronous belt arranged between the driving wheel and the passive wheel; the paper tube pushing mechanism is arranged on the synchronous belt.

[0008] Furthermore, the synchronous belt assembly also includes a synchronous belt tension adjustment device for adjusting the tension of the synchronous belt.

[0009] Furthermore, the synchronous belt tension adjustment device includes a threaded hole and a strip hole provided on the passive wheel support frame, an adjustment block provided on the slideway bracket, and an adjustment bolt threadedly connected to the threaded hole of the passive wheel support frame; the adjustment bolt is rotatably connected to the adjustment block; the strip hole is arranged along the length direction of the synchronous belt; a first threaded hole is provided on the slideway bracket, and a bolt passes through the strip hole to fix the passive wheel support frame to the slideway bracket through the first threaded hole; a passive wheel bearing is provided on the passive wheel support frame; and the passive wheel is mounted on the passive wheel bearing through a passive wheel shaft.

[0010] Furthermore, the paper tube pushing mechanism includes a synchronous belt plate fixedly connected to the synchronous belt, a slide plate fixedly connected to the synchronous belt plate, a cylinder bracket fixedly connected to the slide plate, a cylinder whose cylinder body is fixedly connected to the cylinder bracket, a hand bracket fixedly connected to the output end of the cylinder, and a hand connected to the hand bracket; the hand is used to push the paper tube;

[0011] The slide plate is provided with a second guide rail; the handle bracket is provided with a second slider; the second slider is slidably connected to the second guide rail;

[0012] The synchronous belt plate is arranged on the upper surface of the synchronous belt, the pressure plate is arranged on the lower surface of the synchronous belt, and the synchronous belt plate and the pressure plate are fixed on the synchronous belt by bolts and nuts.

[0013] Furthermore, the guiding device includes a slideway fixedly connected to the support frame and a third slider fixedly connected to the slide plate, and the third slider is slidably connected to the slideway.

[0014] Furthermore, a limit device for preventing collision is provided between the slide bracket and the slide plate, and the limit device includes an inductive limit device and a mechanical limit block; the two mechanical limit blocks are respectively arranged at both ends of the slide bracket to prevent the slide plate from colliding with both ends of the synchronous belt; the inductive limit device includes a travel switch installed at both ends of the slide bracket; the distance between the two mechanical limit blocks is greater than the distance between the two travel switches; the travel switch is arranged inside the mechanical limit block; the two travel switches are used to detect the distance that the hand pushes the paper tube on the slide bracket. .

[0015] Furthermore, the synchronous belt assembly also includes a reducer for driving the driving wheel to rotate; the reducer is fixed on the support frame, the support frame is provided with a deep groove ball bearing, the driving wheel is fixedly connected to the driving shaft; the driving shaft is rotatably connected to the support frame through the deep groove ball bearing; the driving shaft is transmission-connected to the reducer.

[0016] Furthermore, the dial handle is provided with a U-shaped opening groove, and the opening width of the opening groove is larger than the inner diameter of the paper tube and smaller than the outer diameter of the paper tube.

[0017] Furthermore, a buffer positioning device is provided between the dial hand and the dial hand bracket, and the buffer positioning device includes a hydraulic buffer provided on the dial hand bracket and used to reduce the collision force between the dial hand and the paper tube, an adjustment screw provided on the dial hand bracket, a third slide rail fixedly connected to the dial hand bracket, a third slider slidably connected to the third slide rail, and a dial hand fixing frame fixedly connected to the third slider; the dial hand is fixedly connected to the dial hand fixing frame, the adjustment screw abuts against one side of the dial hand fixing frame, and the protruding end of the hydraulic buffer abuts against the other side of the dial hand fixing frame; the dial hand abuts against the paper tube.

[0018] The beneficial effects of the present invention are:

[0019] Through the synchronous belt, the synchronous belt drives the puller, and the puller pushes the paper tube to the core shaft of the winder, replacing the original rodless cylinder to reduce downtime due to failure;

[0020] The synchronous belt tension adjustment device provided includes a first guide rail provided on the slideway bracket, a first slider provided on the passive wheel support bracket, an adjustment block provided on the slideway bracket, and an adjustment bolt threadedly connected to the passive wheel support bracket; when the synchronous belt is stretched due to long-term use, the bolt of the passive wheel support bracket is loosened, the adjustment bolt is rotated, and the adjustment bolt drives the passive wheel support bracket to move, thereby adjusting the position of the passive wheel and tightening the synchronous belt;

[0021] By means of the limiting device arranged on the slide bracket, the position of the dial hand can be detected in time, and the movement trajectory of the dial hand on the slide bracket can be limited to avoid collision between the slide plate and the reducer.

[0022] By means of the buffer positioning device arranged on the dial hand, when the dial hand contacts the paper tube, the contact is soft, which can avoid hard contact between the dial hand and the end face of the paper tube, resulting in defects such as burrs or wrinkles on the end face of the paper tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the C-direction structure;

[0025] Figure 3 for Figure 2 The enlarged view of point E;

[0026] Figure 4 It is a top view of the paper tube pushing mechanism;

[0027] Figure 5 It is the left view of the structure schematic of the passive wheel support frame;

[0028] Figure 6 It is a schematic top view of the structure of the passive wheel support frame;

[0029] Figure 7 This is a schematic diagram of the installation of the passive wheel;

[0030] Figure 8 It is a structural schematic diagram of a buffer positioning device;

[0031] Fig. 9 It is a schematic diagram of the structure of the limit device.

[0032] Description of the numbers in the figure:

[0033] 1-paper tube, 2-paper tube storage part, 3-dial hand, 31-third slide rail, 32-third slider, 33-dial hand fixing frame, 34-adjusting screw, 35-hydraulic buffer, 4-dial hand bracket, 5-second slider, 6-second guide rail, 7-cylinder, 8-slide plate, 9-synchronous belt, 10-driving wheel, 11-driving wheel shaft, 12-reducer, 13-support frame, 81-synchronous belt plate, 82-pressure plate, 83-buffer positioning device, 84-cylinder bracket, 85, mechanical limit block, 131-slideway bracket, 14-slideway, 15-third slider, 16-passive wheel, 161-passive wheel support frame, 162-threaded hole, 163-strip hole, 164-passive wheel bearing, 165-passive wheel shaft, 17-adjustment block, 18-adjustment bolt, 19-travel switch. DETAILED DESCRIPTION

[0034] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0035] Example 1

[0036] like Figure 1-9 As shown,

[0037] A paper tube device includes a support frame 13 fixedly connected to a wall panel, a slide bracket 131 fixedly connected to the support frame 13, and a conveying assembly installed on the slide bracket 131; the conveying assembly includes a synchronous belt assembly for providing power for pushing the paper tube 1, a paper tube pushing mechanism installed on the synchronous belt assembly, and a guide device installed between the paper tube pushing mechanism and the slide bracket 131.

[0038] like Figure 1-2 As shown, the synchronous belt assembly includes a driving wheel support frame fixedly connected to one end of the slide bracket 131, a driving wheel 10 rotatably connected to the driving wheel support frame, a passive wheel support frame 161 arranged at the other end of the slide bracket 131, a passive wheel 16 rotatably connected to the passive wheel support frame 161, and a synchronous belt 9 arranged between the driving wheel 10 and the passive wheel 16; the paper tube pushing mechanism is arranged on the synchronous belt 9.

[0039] The synchronous belt assembly also includes a reducer 12 for driving the driving wheel 10 to rotate; the reducer 12 is fixed on the slide bracket 131, and the slide bracket 131 is provided with a deep groove ball bearing. The driving wheel 10 is fixedly connected to the driving shaft 11; the driving shaft 11 is rotatably connected to the slide bracket 131 through the deep groove ball bearing; the driving shaft 11 is transmission-connected to the reducer 12. The reducer 12 is driven by a motor;

[0040] The driving wheel 10 and the driven wheel 16 are both synchronous wheels, and the two synchronous wheels are adapted to the synchronous belt 9;

[0041] like Figure 1 As shown in FIG. 7 , the paper tube pushing mechanism includes a synchronous belt plate 81 fixedly connected to the synchronous belt 9, a slide plate 8 fixedly connected to the synchronous belt plate 81, a cylinder bracket 84 fixedly connected to the slide plate 8, a cylinder 7 fixedly connected to the cylinder bracket 84, a hand bracket 4 fixedly connected to the output end of the cylinder 7, and a hand 3 connected to the hand bracket 4; the hand 3 is used to push the paper tube 1;

[0042] The slide plate 8 is provided with a second guide rail 6; the hand support 4 is provided with a second slider 5; the second slider 5 is slidably connected to the second guide rail 6;

[0043] The synchronous belt plate 81 is arranged on the upper surface of the synchronous belt 9 , and the pressure plate 82 is arranged on the lower surface of the synchronous belt 9 . Bolts and nuts fix the synchronous belt plate 81 and the pressure plate 82 on the synchronous belt 9 .

[0044] The cylinder 7 is started, driving the dial hand bracket 4 to move up and down along the second guide rail 6, thereby driving the dial hand 3 to move up and down.

[0045] The handle 3 is provided with a U-shaped opening groove, the opening width of which is larger than the inner diameter of the paper tube 1 and smaller than the outer diameter of the paper tube 1. This arrangement prevents the handle 3 from being stuck with the inflation shaft on which the paper tube 1 is installed when the paper tube 1 is moved.

[0046] like Figure 1 As shown, the guide device includes a slideway 14 fixedly connected to the slideway bracket 131 and a third slider 15 fixedly connected to the slide plate 8, and the third slider 15 is slidably connected to the slideway 14. The length direction of the slideway 14 is consistent with the length direction of the synchronous belt 9; the length direction of the slideway 14 is parallel to the paper tube storage part 2; the third slider 15 drives the slide plate 8 to move linearly along the slideway 14, and the slide plate 8 drives the dial hand 3 to move linearly. The synchronous belt 81 drives the slide plate 8 to move linearly along the slideway 14.

[0047] like Fig. 9As shown, a limit device for preventing collision is provided between the slide bracket 131 and the slide plate 8, and the limit device includes an inductive limit device and a mechanical limit block 85. The two mechanical limit blocks 85 are respectively arranged at both ends of the slide bracket 131, and the inductive limit device includes a travel switch 19 installed at both ends of the slide bracket 131, and the travel switch 19 is used to control the position of the dial hand 3 on the slide bracket 131; the distance between the two mechanical limit blocks 85 is greater than the distance between the two travel switches 19; the distance between the two travel switches 19 is determined according to the distance of pushing the paper tube 1; the two travel switches 19 are to control the starting position of the dial hand 3 to convey the paper tube 1 and the stop position of the dial hand 3 to convey the paper tube 1; that is, the two travel switches 19 are used to detect the distance that the dial hand 3 pushes the paper tube 1 on the slide bracket 131.

[0048] The present application is installed on the winder and uses the original controller of the winder; the controller is respectively connected with the travel switch 19, the cylinder 7, and the reducer 12 signal;

[0049] The travel switch 19 is installed on the inner side of the mechanical limit block 85, that is, when the dial handle 3 moves, the travel switch 19 first senses the dial handle 3, and then the travel switch 19 sends a signal to the controller, and the controller sends a stop signal to the motor of the reducer 12. At this time, the slide plate 8 should not collide with the mechanical limit block 85;

[0050] If the travel switch 19 fails, the motor (controller) of the reducer 12 cannot sense the signal of the dial 3, and the motor of the reducer 12 will drive the slide plate 8 to continue moving forward until it contacts the mechanical limit block 85, and the slide plate 8 stops to prevent the slide plate 8 from colliding with the two ends of the synchronous belt 9 and damaging the motor.

[0051] The controller is programmed with the travel switch 19, the cylinder 7 and the reducer 12, and operates automatically to improve efficiency.

[0052] The working process of the present invention,

[0053] After the film roll on the winder is unloaded, a new paper tube 1 needs to be delivered to the film reel (also called the core shaft, which is a kind of air shaft); start the cylinder 7, the cylinder 7 drives the dial hand 3 downward along the second guide rail 6, and when it is in place, the cylinder 7 stops moving, and then start the motor of the reducer 12, the motor drives the reducer 12 to rotate, the reducer 12 drives the driving shaft 11 to rotate, the driving shaft 11 drives the driving wheel 10 to rotate, the driving wheel 10 drives the synchronous belt 9 to rotate, the synchronous belt 9 drives the slide plate 8 to slide along the slideway 14, the slide plate 8 drives the dial hand 3 to move, the dial hand 3 pushes the paper tube 1 on the paper tube storage part 2 onto the air shaft, and when the paper tube 1 is in place (that is, after the travel switch 19 on the left side senses the signal of the dial hand 3), the reducer 12 stops; the cylinder 7 raises the dial hand 3 (to prevent the dial hand 3 from colliding with the paper tube 1 in the paper tube storage part), the reducer 12 reverses, and the synchronous belt 9 returns the slide plate 8 to the starting position (the travel switch 19 on the right side senses the signal of the dial hand 3), waiting for the next delivery.

[0054] Example 2

[0055] The structure of this embodiment is basically the same as that of embodiment 1.

[0056] The difference is that

[0057] It is found in use that when the lever 3 pushes the paper tube 1, the end surface of the paper tube 1 occasionally has burrs, which affects the appearance of the product. The reason is the impact force caused when the lever 3 is driven by the synchronous belt 9 and the end surface of the paper tube 1 is initially contacted. In order to reduce the initial contact force between the lever 3 and the paper tube 1, we designed a buffer positioning device 83, as follows:

[0058] A buffer positioning device 83 is provided between the dial hand 3 and the dial hand bracket 4;

[0059] like Figure 8 As shown, the buffer positioning device 83 includes an oil pressure buffer 35 arranged on the dial hand bracket 4 and used to reduce the collision force between the dial hand 3 and the paper tube 1, an adjustment screw 34 arranged on the dial hand bracket 4, a third slide rail 31 fixedly connected to the dial hand bracket 4, a third slider 32 slidably connected to the third slide rail 31, and a dial hand fixing frame 33 fixedly connected to the third slider 32; the dial hand 3 is fixedly connected to the dial hand fixing frame 33, the adjustment screw 34 abuts against one side of the dial hand fixing frame 33, and the extended end of the oil pressure buffer 35 abuts against the other side of the dial hand fixing frame 33; the dial hand 3 abuts against the paper tube 1; by rotating the adjustment screw 34, the extended length of the dial hand bracket 4 is adjusted, and the initial pressure of the dial hand 3 can be applied to the extended end of the oil pressure buffer 35 through the dial hand fixing frame 33, thereby determining the initial pressure of the dial hand 3;

[0060] When the dial hand 3 contacts the paper tube 1, the dial hand 3 pushes the paper tube 1, and the paper tube 1 gives a reaction force to the dial hand 3. When the reaction force exceeds the initial pressure, the dial hand 3 pushes the protruding end of the oil pressure buffer 35. Since the protruding end of the oil pressure buffer 35 retracts, when the reaction force is balanced with the pressure in the oil pressure buffer 35, the protruding end of the oil pressure buffer 35 pushes the dial hand 3, and the dial hand 3 pushes the paper tube 1 forward, thus avoiding the impact force between the dial hand 3 and the end face of the paper tube 1, which causes the end face of the paper tube 1 to deform.

[0061] Example 3

[0062] The structure of this embodiment is basically the same as that of the embodiment.

[0063] The difference is that

[0064] During use, since the synchronous belt 9 will be stretched, in serious cases, the synchronous wheel will lose rotation, so it is necessary to take measures; add a synchronous belt tension adjustment device;

[0065] The synchronous belt assembly also includes a synchronous belt tension adjustment device for adjusting the tension of the synchronous belt 9.

[0066] like Figure 3-6 As shown, the synchronous belt tension adjustment device includes a threaded hole 162 and a strip hole 163 arranged on the passive wheel support frame 161, an adjustment block 17 arranged on the slide bracket 131, and an adjustment bolt 18 threadedly connected to the threaded hole 162 of the passive wheel support frame 161; the adjustment bolt 18 is rotatably connected to the adjustment block 17; the strip hole 163 is arranged along the length direction of the synchronous belt 9; a first threaded hole is provided on the slide bracket 131, and a bolt passes through the strip hole 163 to fix the passive wheel support frame 161 to the slide bracket 131 through the first threaded hole; a passive wheel bearing 164 is provided on the passive wheel support frame 161; the passive wheel 16 is installed on the passive wheel bearing 164 through a passive wheel shaft 165.

[0067] When the synchronous belt 9 becomes longer, loosen the bolts fixing the passive wheel support frame 161, and rotate the adjusting bolt 18. Under the action of the threaded force, the passive wheel support frame 161 will be pulled to the side of the adjusting block 17. When the synchronous belt 9 becomes tighter, stop rotating the adjusting bolt 18, and fix the passive wheel support frame 161 and the slideway bracket 131 with bolts; increase the distance between the two synchronous wheels to eliminate the influence of the lengthening of the synchronous belt 9.

[0068] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

[0069] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0070] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A paper tube device, characterized in that: It comprises a support frame (13) fixedly connected to a wall panel and a conveying assembly mounted on the support frame (13); the conveying assembly comprises a synchronous belt assembly for pushing a paper tube (1), a paper tube pushing mechanism mounted on the synchronous belt assembly, and a guide device mounted between the paper tube pushing mechanism and the support frame (13); the guide device is used for guiding the paper tube pushing mechanism.

2. A paper tube device according to claim 1, characterized in that: The synchronous belt assembly comprises a slideway bracket (131) fixedly connected to the support frame (13), a driving wheel support frame fixedly connected to one end of the slideway bracket (131), a driving wheel (10) rotatably connected to the driving wheel support frame, a passive wheel support frame (161) arranged at the other end of the slideway bracket (131), a passive wheel (16) rotatably connected to the passive wheel support frame (161), and a synchronous belt (9) arranged between the driving wheel (10) and the passive wheel (16); the paper tube pushing mechanism is arranged on the synchronous belt (9).

3. A paper tube device according to claim 2, characterized in that: The synchronous belt assembly also includes a synchronous belt tension adjustment device for adjusting the tension of the synchronous belt (9).

4. A paper tube device according to claim 3, characterized in that: The synchronous belt tension adjustment device comprises a threaded hole (162) and a strip hole (163) provided on the passive wheel support frame (161), an adjustment block (17) provided on the slideway bracket (131), and an adjustment bolt (18) threadedly connected to the threaded hole (162) of the passive wheel support frame (161); the adjustment bolt (18) is rotatably connected to the adjustment block (17); the strip hole (163) is arranged along the length direction of the synchronous belt (9); a first threaded hole is provided on the slideway bracket (131), and a bolt passes through the strip hole (163) to fix the passive wheel support frame (161) to the slideway bracket (131) through the first threaded hole; a passive wheel bearing (164) is provided on the passive wheel support frame (161); and the passive wheel (16) is mounted on the passive wheel bearing (164) through a passive wheel shaft (165).

5. A paper tube device according to claim 2, characterized in that: The paper tube pushing mechanism comprises a synchronous belt plate (81) fixedly connected to the synchronous belt (9), a slide plate (8) fixedly connected to the synchronous belt plate (81), a cylinder bracket (84) fixedly connected to the slide plate (8), a cylinder (7) whose cylinder body is fixedly connected to the cylinder bracket (84), a hand bracket (4) fixedly connected to the output end of the cylinder (7), and a hand (3) connected to the hand bracket (4); the hand (3) is used to push the paper tube (1); The slide plate (8) is provided with a second guide rail (6); the handle bracket (4) is provided with a second slider (5); the second slider (5) is slidably connected to the second guide rail (6); The synchronous belt plate (81) is arranged on the upper surface of the synchronous belt (9), and the pressure plate (82) is arranged on the lower surface of the synchronous belt (9). Bolts and nuts fix the synchronous belt plate (81) and the pressure plate (82) on the synchronous belt (9).

6. A paper tube device according to claim 5, characterized in that: The guide device comprises a slideway (14) fixedly connected to the slideway bracket (131) and a third sliding block (15) fixedly connected to the slide plate (8), wherein the third sliding block (15) is slidably connected to the slideway (14).

7. A paper tube device according to claim 5, characterized in that: A limit device for preventing collision is provided between the slide bracket (131) and the slide plate (8), and the limit device comprises an inductive limit device and a mechanical limit block (85); the two mechanical limit blocks (85) are respectively arranged at two ends of the slide bracket (131), and the inductive limit device comprises a travel switch (19) installed at two ends of the slide bracket (131); the distance between the two mechanical limit blocks (85) is greater than the distance between the two travel switches (19); the travel switch (19) is arranged on the inner side of the mechanical limit block (85); the two travel switches (19) are used to detect the distance that the pusher (3) pushes the paper tube (1) on the slide bracket (131).

8. A paper tube device according to claim 2, characterized in that: The synchronous belt assembly also includes a reducer (12) for driving the driving wheel (10) to rotate; the reducer (12) is fixed on the slide bracket (131), and the slide bracket (131) is provided with a deep groove ball bearing, and the driving wheel (10) is fixedly connected to the driving shaft (11); the driving shaft (11) is rotationally connected to the slide bracket (13) through the deep groove ball bearing; the driving shaft (11) is transmission-connected to the reducer (12).

9. A paper tube device according to claim 5, characterized in that: The handle (3) is provided with a U-shaped opening groove, and the opening width of the opening groove is larger than the inner diameter of the paper tube (1) and smaller than the outer diameter of the paper tube (1).

10. The paper tube device according to claim 5, characterized in that: A buffer positioning device (83) is provided between the dial hand (3) and the dial hand bracket (4), and the buffer positioning device (83) comprises an oil pressure buffer (35) provided on the dial hand bracket (4) and used for reducing the collision force between the dial hand (3) and the paper tube (1), an adjustment screw (34) provided on the dial hand bracket (4), a third slide rail (31) fixedly connected to the dial hand bracket (4), a third slider (32) slidably connected to the third slide rail (31), and a dial hand fixing frame (33) fixedly connected to the third slider (32); the dial hand (3) is fixedly connected to the dial hand fixing frame (33), the adjustment screw (34) abuts against one side of the dial hand fixing frame (33), and the protruding end of the oil pressure buffer (35) abuts against the other side of the dial hand fixing frame (33); the dial hand (3) abuts against the paper tube (1).

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