High-continuity rubber roller sleeve coiling machine

Abstract

The utility model relates to a high-continuity rubber roller sleeve winding machine which comprises a rack and a driving shaft rotationally installed on the rack, one end of the driving shaft is connected with a driving device used for driving the driving shaft to rotate, the other end of the driving shaft is provided with a winding device, the winding device comprises a fixed disc and a movable disc, the fixed disc is fixedly connected with the driving shaft, and the movable disc is fixedly connected with the driving shaft. The movable disc is located at the end, away from the driving device, of the driving shaft, the movable disc is connected with an easily-disassembled device, the easily-disassembled device is used for detachably connecting the movable disc to the driving shaft, a tensioning device is arranged between the movable disc and the fixed disc and comprises a plurality of arc-shaped plates, and the arc-shaped plates are distributed in the circumferential direction of the driving shaft. Each arc-shaped plate is connected with two parallel connecting rods, one end of each connecting rod is rotationally connected to the corresponding arc-shaped plate, the other end of each connecting rod is rotationally connected to the driving shaft, and the connecting rods incline towards the direction of the movable disc from the ends connected with the driving shaft to the ends connected with the arc-shaped plates. The device has the effect that the inner cylinder support can be conveniently detached and replaced.

Description

Technical Field

[0001] The present application relates to the technical field of a disking machine, and more particularly to a high - continuity rubber roller sleeve disking machine. Background Art

[0002] A disking machine is a device for automatically coiling disks. A rubber roller sleeve is a semi - finished product in the production process of a printer rubber roller. During the production process, the rubber roller sleeve is formed into a strip and wound around an inner cylinder support. The inner cylinder support is cylindrical. The inner cylinder support is used to be installed on the disking machine. The disking machine rotates the inner cylinder support so that the strip - shaped rubber roller sleeve is wound around the inner cylinder support for use in the subsequent production process of the rubber roller.

[0003] In the related art, a disking machine is disclosed, which includes a box body. A driving device, a feeding device and a winding device are arranged on the box body. The winding device includes a separately - arranged driving disk and a driven disk. The driving disk is connected to the output end of the driving device. The driven disk is connected to the driving disk. A discharging device is connected to the driven disk. The discharging device includes a discharging driving mechanism and a discharging executing mechanism. The discharging driving mechanism includes a discharging cylinder, a supporting rod and a swing arm. The supporting rod is fixedly connected to the box body by means of a discharging column. The middle part of the swing arm is hinged to the supporting rod. The lower end of the swing arm is hinged to the telescopic end of the discharging cylinder. The discharging executing mechanism includes a discharging rod and a pin. The discharging rod is fixed to the discharging column. The driven disk is sleeved on the discharging rod by means of a sliding sleeve and has a freedom of sliding relative to the discharging rod. A winding shaft is coaxially and fixedly arranged on the driven disk. The winding shaft is arranged in a frustum shape. The diameter of the end of the winding shaft close to the driving disk is smaller than the diameter of the end far from the driving disk. When in use, the driven disk and the driving disk are connected, and disking is completed on the winding shaft.

[0004] However, in the above - mentioned structure, since the inner cylinder support is installed on the frustum - shaped winding shaft, and there is a need for friction between the winding shaft and the inner wall of the inner cylinder support to drive the winding shaft to rotate, it is rather troublesome to remove the inner cylinder support from the winding shaft. Summary of the Utility Model

[0005] In order to facilitate the disassembly and replacement of the inner cylinder support, the present application provides a high - continuity rubber roller sleeve disking machine.

[0006] The present application provides a high - continuity rubber roller sleeve disking machine, adopting the following technical solutions:

[0007] A high - continuity rubber roller sleeve winding machine, comprising a frame and a driving shaft rotatably mounted on the frame. One end of the driving shaft is connected with a driving device for driving the driving shaft to rotate, and the other end is equipped with a winding device. The winding device includes a fixed disk and a movable disk. The fixed disk is fixedly connected to the driving shaft, and the movable disk is located at the end of the driving shaft away from the driving device. An easy - disassembly device is connected to the movable disk, and the easy - disassembly device is used to detachably connect the movable disk to the driving shaft. A tensioning device is arranged between the movable disk and the fixed disk. The tensioning device includes a plurality of arc - shaped plates, which are distributed circumferentially along the driving shaft. Two parallel connecting rods are connected to each arc - shaped plate. One end of the connecting rod is rotatably connected to the arc - shaped plate, and the other end is rotatably connected to the driving shaft. The end of the arc - shaped plate close to the movable disk abuts against the movable disk to adjust the distance between the movable disk and the center line of the driving shaft. The connecting rod is inclined from the end connected to the driving shaft to the end connected to the arc - shaped plate in the direction of the movable disk.

[0008] By adopting the above - mentioned technical solution, during use, the inner - cylinder support for winding the strip - shaped rubber roller sleeve is installed between the movable disk and the fixed disk and sleeved outside the plurality of arc - shaped plates. After the rubber roller sleeve is wound on the inner - cylinder support, first, the movable disk is detached from the end of the driving shaft through the easy - disassembly device. Then, the arc - shaped plate remains in contact with the inner wall of the inner - cylinder support. However, when the inner - cylinder support is moved in the direction away from the fixed disk, since the inner - cylinder support will drive the arc - shaped plate to move in the direction away from the fixed disk, the inner - cylinder support will automatically move in the direction close to the axis of the driving shaft under the action of the connecting rod during the movement, so that the arc - shaped plate is separated from the inner - cylinder support, and then the inner - cylinder support can be conveniently detached from the arc - shaped plate, facilitating the replacement of the inner - cylinder support.

[0009] Preferably, a sleeve is arranged at the center of the movable disk, and the sleeve is integrally formed with the movable disk. The end of the driving shaft away from the driving device is provided with a screw part and a smooth rod part. The screw part is used to connect with the easy - disassembly device, and the smooth rod part is used to cooperate with the sleeve. The diameter of the smooth rod part is larger than that of the screw part.

[0010] By adopting the above - mentioned technical solution, the sleeve is integrally formed with the movable disk and cooperates with the smooth rod part. When connecting the movable disk to the driving shaft, the sleeve reaches the position where it cooperates with the smooth rod part from the screw part, making the installation of the movable disk relatively convenient. At the same time, the screw part is connected with the easy - disassembly device to fix the movable disk.

[0011] Preferably, the easy - disassembly device includes a rotating body and a card connected inside the rotating body. One end of the card is used to cooperate with the thread of the screw part, and the thread of the screw part adopts a rectangular thread. The rotating body is rotatably connected to the sleeve.

[0012] By adopting the above technical solution, the card is rotatably connected within the rotating body. One end of the card is adapted to fit into the thread of the screw rod. The thread of the screw rod part adopts a rectangular thread, so that the connection between the card and the thread of the screw rod part is relatively firm. And by disengaging the card from the thread of the screw rod part, it is convenient to disassemble the detachable device from the screw rod part.

[0013] Preferably, a through groove is formed on the side wall of the rotating body. The card passes through the through groove. One end of the card is located within the rotating body, and the other end is located outside the rotating body. The middle part of the card is rotatably connected to the rotating body. And a tension spring is connected to the end of the card located within the rotating body. The acting force of the tension spring is used to drive the card to abut against the thread of the screw rod part.

[0014] By adopting the above technical solution, the card passes through the through groove. One end of the card is located outside the rotating body. When it is necessary to remove the rotating body from the screw, rotate the card on the outside of the rotating body to tension the tension spring, and then the card disengages from the thread of the screw, which is convenient to directly pull off the rotating body from the screw rod part.

[0015] Preferably, handles are fixedly arranged on the outer wall of the rotating body. And there are two handles. The two handles respectively correspond to one card. The two cards are arranged at intervals with the handles.

[0016] By adopting the above technical solution, the two handles are fixed on the outside of the rotating body. It requires the staff to operate the two cards with both hands at the same time, improving the safety when removing the rotating body.

[0017] Preferably, the driving device includes a driving motor and a speed reducer. The driving shaft is fixed on the machine frame through a bearing seat. The speed reducer is fixed on the machine frame. The driving motor is fixed on the speed reducer. The output shaft of the driving motor is coaxially connected to the output shaft of the speed reducer. The output shaft of the speed reducer is coaxially connected to the driving shaft. Two winding devices are arranged at intervals.

[0018] By adopting the above technical solution, the driving motor rotates the driving shaft through the speed reducer. And the two winding devices are driven by the two driving devices. The two winding devices can work alternately, so that the winding of the rubber roller sleeve can be relatively continuous.

[0019] Preferably, a guiding device is installed on the machine frame. The guiding device includes two wire guiding components and a linear driving module. The linear driving module is fixed on the machine frame. And the driving direction of the linear driving module is parallel to the axis direction of the driving shaft. A wire guiding component is fixed at the output part of the linear driving module, and the other wire guiding component is fixed on the machine frame.

[0020] By adopting the above technical solution, a guiding device is installed on the frame to initially control the position of the rubber roller sleeve, and then the rubber roller sleeve is laid along the axis direction of the inner cylinder bracket through the guiding device installed on the linear driving module, so that the winding of the rubber roller sleeve is relatively flat.

[0021] Preferably, the wire guiding assembly includes a body, a horizontal runner and a vertical runner. The body in the wire guiding assembly installed on the linear driving module is fixed on the output part of the linear driving module, and the body in the wire guiding assembly installed on the frame is fixed on the frame. Two horizontal runners are arranged in parallel and at intervals on the body, and two vertical runners are arranged in parallel and at intervals on the body. Both the two horizontal runners and the two vertical runners are rotatably connected to the body, and the two vertical runners are located between the two horizontal runners.

[0022] By adopting the above technical solution, the two horizontal runners are used to support the rubber roller sleeve, and the two vertical runners can limit the horizontal position of the rubber roller sleeve. Therefore, the two vertical runners and the two horizontal runners can reduce the friction of the rubber roller sleeve and control the position of the rubber roller sleeve.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By using the detachable device to disassemble the movable disk from the end of the driving shaft, when the inner cylinder bracket is moved away from the fixed disk, since the inner cylinder bracket will drive the arc plate to move away from the fixed disk, and then the inner cylinder bracket will automatically move towards the axis direction of the driving shaft under the action of the connecting rod during the movement, so that the arc plate is separated from the inner cylinder bracket, and then the inner cylinder bracket can be conveniently disassembled from the arc plate, which is convenient for replacing the inner cylinder bracket;

[0025] 2. One end of the card is located outside the rotating body. When it is necessary to remove the rotating body from the screw, the card is rotated on the outside of the rotating body to tighten the tension spring, and then the card is disengaged from the thread of the screw, which is convenient for directly pulling the rotating body off the screw part;

[0026] 3. The rubber roller sleeve is laid along the axis direction of the inner cylinder bracket through the guiding device installed on the linear driving module, so that the winding of the rubber roller sleeve is relatively flat. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0028] Figure 2 is the position schematic diagram of the tensioning device in the embodiment of the present application;

[0029] Figure 3 is the structural schematic diagram of the driving shaft in the embodiment of the present application;

[0030] Figure 4 It is a schematic structural diagram of the easily detachable device in the embodiment of the present application.

[0031] Explanation of the reference numerals: 1, frame; 11, control box; 2, winding device; 21, fixed disk; 22, movable disk; 221, sleeve; 222, chamfer; 3, driving device; 31, driving motor; 32, reducer; 4, guiding device; 41, wire assembly; 411, body; 412, horizontal runner; 413, vertical runner; 42, linear driving module; 5, rubber roller sleeve; 51, inner cylinder bracket; 6, driving shaft; 61, screw part; 62, smooth rod part; 7, easily detachable device; 71, rotating body; 711, handle; 72, card; 721, rubber sleeve; 73, tension spring; 74, through slot; 8, tensioning device; 81, arc-shaped plate; 82, connecting rod; 9, bearing seat. Detailed implementation manners

[0032] The following further elaborates on the present application in conjunction with the Figures 1-4 accompanying drawings.

[0033] The embodiment of the present application discloses a high - continuity rubber roller sleeve winding machine. Referring to Figure 1 , it includes a frame 1. There are two winding devices 2 arranged on the frame 1. The winding device 2 is connected to a driving device 3 for driving the winding device 2 to rotate. At the same time, a guiding device 4 is arranged on the frame 1. The guiding device 4 is used to guide the conveying direction of the rubber roller sleeve 5. An inner cylinder bracket 51 is installed on the winding device 2. The inner cylinder bracket 51 rotates under the drive of the driving device 3, so that one end of the strip - shaped rubber roller sleeve 5 is wound on the inner cylinder bracket 51. A control box 11 is also fixedly arranged on the frame 1. The control box 11 is used to control the switch of the driving device 3.

[0034] Referring to Figure 2 , a driving shaft 6 is rotatably installed on the frame 1. One end of the driving shaft 6 is connected to the driving device 3, and the other end extends out of the frame 1 and is suspended. The winding device 2 is installed at the end of the driving shaft 6 far from the driving device 3. The winding device 2 includes a fixed disk 21 and a movable disk 22. The fixed disk 21 is fixedly arranged with the driving shaft 6 and the fixed disk 21 is located at the end of the driving shaft 6 close to the driving device 3. The movable disk 22 is sleeved on the end of the driving shaft 6 far from the driving device 3, so that the movable disk 22 can be detached from the driving shaft 6. An easily detachable device 7 for connecting with the driving shaft 6 is connected to the movable disk 22. The easily detachable device 7 facilitates connecting the movable disk 22 to the driving shaft 6 and moving the movable disk 22 along the axis direction of the driving shaft 6, so that the movable disk 22 approaches the fixed disk 21.

[0035] Referring to Figure 2, a tensioning device 8 is arranged between the fixed disk 21 and the movable disk 22. The tensioning device 8 is used to abut against the inner wall of the inner cylinder bracket 51, and the inner cylinder bracket 51 is cylindrical. The tensioning device 8 includes a plurality of arc-shaped plates 81 distributed around the driving shaft 6. A connecting rod 82 is arranged between the arc-shaped plate 81 and the driving shaft 6. Two connecting rods 82 are connected to each arc-shaped plate 81 and the two connecting rods 82 are arranged in parallel. The connecting rod 82 is inclined in the axial direction of the driving shaft 6. One end of the connecting rod 82 is rotatably connected to the arc-shaped plate 81, and the other end is rotatably connected to the driving shaft 6. The axis of rotation of the connecting rod 82 and the driving shaft 6 is perpendicular to the axis of the driving shaft 6. The connecting rod 82 is inclined from the end connected to the driving shaft 6 to the end connected to the arc-shaped plate 81 gradually in the direction where the movable disk 22 is installed on the driving shaft 6. During use, first disassemble the movable disk 22 from the driving shaft 6, then sleeved the inner cylinder bracket 51 on the plurality of arc-shaped plates 81, and then extrude the movable disk 22 towards the fixed disk 21, so that the movable disk 22 pushes one side of the arc-shaped plate 81, and the arc-shaped plate 81 gradually moves away from the axis of the driving shaft 6 under the action of the connecting rod 82. Furthermore, the arc-shaped plate 81 can abut against the inner wall of the inner cylinder bracket 51, and the inner cylinder bracket 51 is fixed on the driving shaft 6.

[0036] Reference Figure 2 and Figure 3 , a screw part 61 and a smooth rod part 62 are arranged at one end of the driving shaft 6 close to the movable disk 22. A sleeve 221 is arranged at the central position of the movable disk 22. The sleeve 221 is integrally arranged with the movable disk 22. The sleeve 221 is used to sleeve on the smooth rod part 62, and the diameter of the smooth rod part 62 is larger than that of the screw part 61, which is convenient for installing the movable disk 22 on the driving shaft 6. A chamfer 222 is arranged at one end of the smooth rod part 62 close to the screw part 61. The screw part 61 is used to connect with the detachable device 7. Combine Figure 4, the easy-disassembly device 7 includes a rotating body 71 and a card 72. The rotating body 71 is sleeved on the screw part 61, and the rotating body 71 is rotatably connected to the sleeve 221. The central axes of the rotating body 71 and the sleeve 221 coincide, so that after the movable plate 22 is disassembled, the easy-disassembly device 7 can be kept connected to the movable plate 22 to prevent loss. A through groove 74 penetrating the rotating body 71 is formed in the side wall of the rotating body 71. The card 72 is installed in the through groove 74. One end of the card 72 is located inside the rotating body 71, and the other end is located outside the rotating body 71. The middle part of the card 72 is rotatably connected to the rotating body 71. A tension spring 73 is arranged at the end of the card 72 located inside the rotating body 71. One end of the tension spring 73 is fixed to the card 72, and the other end is fixed to the rotating body 71. The tension spring 73 is used to drive the card 72 to rotate, and under the action of the tension spring 73, the end of the card 72 located inside the rotating body 71 can be close to the side wall of the screw part 61. The end of the card 72 located inside the rotating body 71 is used to cooperate with the thread of the screw part 61, and the thread of the screw part 61 can adopt a rectangular thread. When the card 72 is clamped into the thread of the screw part 61 under the action of the tension spring 73, when the rotating body 71 is rotated relative to the screw part 61, the rotating body 71 will drive the card 72 to move along the thread of the screw part 61, so that the easy-disassembly device 7 can drive the movable plate 22 along the length direction of the screw part 61. When it is necessary to disassemble the movable plate 22, the end of the card 72 is rotated outside the rotating body 71, so that the end of the card 72 located inside the rotating body 71 rotates away from the screw part 61, and then the card 72 is separated from the screw part 61, so that the movable plate 22 can directly slide out from the screw part 61. Two cards 72 are symmetrically arranged, and a handle 711 is arranged at a position corresponding to each card 72. The handle 711 is fixed to the rotating body 71. The card 72 and the handle 711 are arranged at intervals. The staff can rotate the card 72 towards the handle 711 while holding the two handles 711 with both hands at the same time, so that the card 72 is separated from the screw part 61. The operation is relatively convenient, and the movable plate 22 can be disassembled only when both hands hold the two handles 711 at the same time, making the operation relatively safe. A rubber sleeve 721 is arranged at the end of the card 72 located outside the rotating body 71, and the rubber sleeve 721 makes it more comfortable to rotate the card 72.

[0037] Reference Figure 1 and Figure 3, the driving device 3 includes a driving motor 31 and a speed reducer 32. The driving shaft 6 is fixed to the frame 1 through a bearing block 9. The speed reducer 32 is fixed to the frame 1, and the driving motor 31 is fixed to the speed reducer 32. The output shaft of the driving motor 31 is coaxially connected to the input shaft of the speed reducer 32, and the output shaft of the speed reducer 32 is coaxially connected to the driving shaft 6, so that the driving motor 31 drives the driving shaft 6 to rotate through the speed reducer 32. The guiding device 4 includes two wire assemblies 41 and a linear driving module 42. The linear driving module 42 is fixed to the frame 1 and is parallel to the axis direction of the driving shaft 6. The output part of the linear driving module 42 is fixedly connected to a wire assembly 41, and the other wire assembly 41 is fixed to the frame 1. The wire assembly 41 includes a body 411, a horizontal runner 412 and a vertical runner 413. Two horizontal runners 412 are arranged in parallel and at intervals. The two vertical runners 413 are located between the two horizontal runners 412, and both the horizontal runner 412 and the vertical runner 413 are rotatably connected to the body 411, so that the rubber roller sleeve 5 is clamped between the two vertical runners 413 and rests on the horizontal runner 412. The wire assembly 41 moving on the linear driving module 42 can drive the rubber roller sleeve 5 to be arranged on the inner cylinder bracket 51.

[0038] When this embodiment is in use, first pass the rubber roller sleeve 5 through between the two vertical runners 413 of the wire assembly 41 fixed to the frame 1, then pass it through between the two vertical runners 413 of the wire assembly 41 on the linear driving module 42, and then wind it on the inner cylinder bracket 51 installed on a winding device 2. The driving device 3 drives the inner cylinder bracket 51 to rotate to wind the rubber roller sleeve 5 on the inner cylinder bracket 51. Before the winding of the rubber roller sleeve 5 on one inner cylinder bracket 51 is completed, first install a new inner cylinder bracket 51 on another winding device 2 to make the two winding devices 2 work alternately.

[0039] The above are all preferred embodiments of this application. The protection scope of this application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A high - continuity rubber roller sleeve punching machine, characterized in that: It includes a frame (1) and a driving shaft (6) rotatably mounted on the frame (1). One end of the driving shaft (6) is connected with a driving device (3) for driving the driving shaft (6) to rotate, and the other end is equipped with a winding device (2). The winding device (2) includes a fixed disk (21) and a movable disk (22). The fixed disk (21) is fixedly connected with the driving shaft (6), and the movable disk (22) is located at one end of the driving shaft (6) far from the driving device (3). An easy-disassembly device (7) is connected to the movable disk (22), and the easy-disassembly device (7) is used to detachably connect the movable disk (22) to the driving shaft (6). A tensioning device (8) is arranged between the movable disk (22) and the fixed disk (21). The tensioning device (8) includes a plurality of arc-shaped plates (81). The plurality of arc-shaped plates (81) are distributed along the circumferential direction of the driving shaft (6). Two parallel connecting rods (82) are connected to each arc-shaped plate (81). One end of the connecting rod (82) is rotatably connected to the arc-shaped plate (81), and the other end is rotatably connected to the driving shaft (6). One end of the arc-shaped plate (81) close to the movable disk (22) abuts against the movable disk (22) to adjust the distance between the movable disk (22) and the center line of the driving shaft (6). The connecting rod (82) is inclined from the end connected to the driving shaft (6) to the end connected to the arc-shaped plate (81) in the direction of the movable disk (22).

2. The high-continuity rubber roller sleeve punching machine according to claim 1, wherein: A sleeve (221) is arranged at the center of the movable disk (22). The sleeve (221) is integrally provided with the movable disk (22). One end of the driving shaft (6) far from the driving device (3) is provided with a screw part (61) and a smooth rod part (62). The screw part (61) is used to connect with the easy-disassembly device (7), and the smooth rod part (62) is used to cooperate with the sleeve (221). The diameter of the smooth rod part (62) is larger than that of the screw part (61).

3. The high-continuity rubber roller sleeve punching machine according to claim 2, wherein: The easy-disassembly device (7) includes a rotating body (71) and a card (72) connected inside the rotating body (71). One end of the card (72) is used to fit into the thread of the screw part (61). The thread of the screw part (61) adopts a rectangular thread. The rotating body (71) is rotatably connected to the sleeve (221).

4. A high - continuity rubber roller sleeve punching machine according to claim 3, wherein: A through groove (74) is formed on the side wall of the rotating body (71). The card (72) passes through the through groove (74). One end of the card (72) is located inside the rotating body (71), and the other end is located outside the rotating body (71). The middle part of the card (72) is rotatably connected to the rotating body (71). And a tension spring (73) is connected to the end of the card (72) located inside the rotating body (71). The acting force of the tension spring (73) is used to drive the card (72) to abut against the thread of the screw part (61).

5. The high - continuity rubber roller sleeve punching machine according to claim 4, characterized in that: A handle (711) is fixedly arranged on the outer wall of the rotating body (71), and there are two handles (711). The two handles (711) respectively correspond to one card (72). The two cards (72) are spaced apart from the handle (711).

6. The high - continuity rubber roller sleeve punching machine according to claim 1, characterized in that: The driving device (3) includes a driving motor (31) and a speed reducer (32). The driving shaft (6) is fixed to the frame (1) through a bearing seat (9). The speed reducer (32) is fixed to the frame (1). The driving motor (31) is fixed to the speed reducer (32). The output shaft of the driving motor (31) is coaxially connected to the output shaft of the speed reducer (32). The output shaft of the speed reducer (32) is coaxially connected to the driving shaft (6). Two winding devices (2) are arranged at intervals.

7. A high - continuity rubber roller sleeve punching machine according to claim 1, wherein: A guiding device (4) is installed on the frame (1). The guiding device (4) includes two wire guiding assemblies (41) and a linear driving module (42). The linear driving module (42) is fixed to the frame (1), and the driving direction of the linear driving module (42) is parallel to the axis direction of the driving shaft (6). A wire guiding assembly (41) is fixed to the output part of the linear driving module (42), and the other wire guiding assembly (41) is fixed to the frame (1).

8. A high - continuity rubber roller sleeve punching machine according to claim 7, characterized in that: The wire guiding assembly (41) includes a body (411), a horizontal runner (412) and a vertical runner (413). The body (411) in the wire guiding assembly (41) installed on the linear driving module (42) is fixed to the output part of the linear driving module (42). The body (411) in the wire guiding assembly (41) installed on the frame (1) is fixed to the frame (1). Two horizontal runners (412) are arranged in parallel and at intervals on the body (411). Two vertical runners (413) are arranged in parallel and at intervals on the body (411). The two horizontal runners (412) and the two vertical runners (413) are all rotatably connected to the body (411). The two vertical runners (413) are located between the two horizontal runners (412).

Images