A tubular film unwinding device

Abstract

The application relates to the technical field of cylindrical film processing, and provides a cylindrical film unwinding device, which comprises a rack, a tripod and a limiting assembly; the tripod comprises a frame body, a rotating shaft and a connecting pipe; the rotating shaft is arranged along the length direction of the rack and is arranged at one end of the frame body; the rotating shaft is rotationally connected to the upper end of the rack; the connecting pipe is arranged at the lower side of the frame body close to the one end of the rotating shaft; the limiting assembly comprises a ratchet wheel, a pawl, an elastic piece and a pull rope; the ratchet wheel is arranged at one end of the rotating shaft; the pawl is rotationally connected to the rack; the elastic piece is arranged between the pawl and the rack, so that the pawl is driven to abut against the ratchet wheel, and the frame body is limited to rotate downward; one end of the pull rope is arranged on the side of the pawl away from the ratchet wheel, and the other end of the pull rope is movably arranged through the rack. Based on this, the included angle between the tripod and the rack can be conveniently adjusted.

Description

Technical Field

[0001] This application relates to the field of tubular film processing, and more particularly to a tubular film unfolding apparatus. Background Technology

[0002] Currently, in the processing of single-section cylindrical films, a cylindrical film unfolding device is required to unfold the film in order to facilitate the winding of the single-section cylindrical film.

[0003] In related technologies, a tubular film unfolding device includes a frame, a tripod, and guide rollers. The tripod is fixedly connected to the frame, and the tripod and frame are set at an acute angle. Multiple guide rollers are rotatably connected to the frame. In use, the tubular film is guided and conveyed by the guide rollers. After passing over the top of the tripod, the film unfolds, facilitating subsequent winding. For tubular films of different sizes, the angle between the tripod and the frame needs to be adjusted to ensure unfolding stability.

[0004] However, in practical applications, the tripod needs to be disassembled, its angle adjusted, and then reassembled to adjust the angle between the tripod and the frame, which is quite cumbersome and therefore needs to be improved. Summary of the Invention

[0005] To facilitate adjustment of the angle between the tripod and the frame, this application provides a cylindrical film unfolding device.

[0006] The tubular film unfolding device provided in this application adopts the following technical solution: A cylindrical film unfolding device includes a frame, a tripod, and a limiting assembly. The tripod includes a frame body, a rotating shaft, and a connecting tube. The rotating shaft is arranged along the length of the frame and located at one end of the frame body, and is rotatably connected to the upper end of the frame. The connecting tube is located on the lower side of the frame body near the end of the rotating shaft. The limiting assembly includes a ratchet, a pawl, an elastic element, and a pull rope. The ratchet is located at one end of the rotating shaft. The pawl is rotatably connected to the frame. The elastic element is located between the pawl and the frame to drive the pawl to press against the ratchet, thereby limiting the downward rotation of the frame body. One end of the pull rope is located on the side of the pawl away from the ratchet, and the other end is movably threaded through the frame.

[0007] By adopting the above technical solution, in practical applications, when it is necessary to increase the angle between the tripod and the frame, the operator pulls the rope to rotate the pawl, causing the pawl to separate from the ratchet. Since the rotating shaft is connected to the frame, and under the weight of the frame, the frame rotates downwards. Then, the rope is released, and the elastic element drives the pawl to rotate and press against the ratchet, thus limiting the frame from continuing to rotate, thereby increasing the angle between the tripod and the frame. When it is necessary to decrease the angle between the tripod and the frame, the operator pushes the connecting tube upwards, causing the frame to rotate, so that the pawl presses against different positions of the ratchet, thereby decreasing the angle between the tripod and the frame. This completes the adjustment of the angle between the tripod and the frame. The structure is simple and the operation is convenient, making it easy to adjust the angle between the tripod and the frame.

[0008] Preferably, the tripod further includes an abutment post and a spring, the upper end of the connecting tube is rotatably connected to the frame, the abutment post is slidably connected in the connecting tube, and the spring is disposed between the upper end of the abutment post and the connecting tube to drive the abutment post away from the connecting tube and abut against the frame.

[0009] By adopting the above technical solution, and by setting up the abutment post and spring, the upper end of the connecting pipe is rotatably connected to the frame, so that the connecting pipe is set vertically under the action of gravity. The abutment post can abut against the frame more stably under the drive of the spring, so as to support the frame and reduce the force between the ratchet and the pawl, thereby improving the service life of the ratchet and the pawl.

[0010] Preferably, the frame is provided with a limiting seat, the limiting seat includes a base body, and the abutting post is located in the base body.

[0011] By adopting the above technical solution and setting a limiting seat, the connecting pipe moves along the width direction of the frame during rotation. Since the abutting post is located in the seat, the seat limits the abutting post, thereby limiting the movement distance of the connecting pipe and thus limiting the rotation angle of the frame.

[0012] Preferably, the frame is provided with a threaded post, and the lower end of the base is threadedly connected to the threaded post.

[0013] By adopting the above technical solution, by setting threaded columns and rotating the base body, the base body moves upward. When the base body moves upward to a certain position, the abutment column drives the connecting pipe to move upward, thereby driving the frame to rotate slightly, thus enabling precise adjustment of the angle between the tripod and the machine frame.

[0014] Preferably, the limiting seat further includes a limiting plate, which is rotatably connected to the seat body. A limiting groove is formed on the upper side of the limiting plate along the width direction of the frame, and the abutting post is limited in the limiting groove.

[0015] By adopting the above technical solution, by setting a limiting plate, the abutment column is limited in the limiting groove to limit the movement of the abutment column, thereby limiting the movement of the connecting pipe, thus improving the stability of the frame rotation, and further improving the stability of the angle adjustment between the tripod and the frame.

[0016] Preferably, the limiting seat further includes two rotating rods, which are disposed on the periphery of the seat body and spaced apart along the circumference of the seat body.

[0017] By adopting the above technical solution, two rotating rods are set to facilitate the rotation of the base.

[0018] Preferably, the tripod further includes a support column, one end of which is rotatably connected to the lower side of the frame away from the pivot, and the other end abuts against the abutment column.

[0019] By adopting the above technical solution and setting support columns, the frame can be supported and the movement of the abutment columns during operation can be restricted, so as to ensure that the angle between the tripod and the frame remains stable during operation, thereby improving the stability of the angle adjustment between the tripod and the frame.

[0020] Preferably, the abutting post has a relief groove along its own length, and the supporting post passes through the relief groove and abuts against the bottom wall of the relief groove.

[0021] By adopting the above technical solution and setting a clearance groove, it is possible to abut the abutting column at different positions. The upward movement of the support column away from the rotating end can cause the abutting column to drive the connecting pipe to move upward, thereby driving the frame to rotate slightly, thus enabling precise adjustment of the angle between the tripod and the machine frame.

[0022] Preferably, the support column includes a first column and a second column, one end of the first column is rotatably connected to the frame, and the second column is threadedly connected to the other end of the first column and located in the relief groove.

[0023] By adopting the above technical solution, by setting a first column and a second column, the support column can be inserted into the relief groove.

[0024] Preferably, the limiting component further includes a pedal, and one end of the pull rope away from the pawl extends to the lower end of the frame and is located on the pedal.

[0025] By adopting the above technical solution, a foot pedal is set up for workers to step on, which facilitates pulling the rope and thus makes it easier to adjust the angle between the tripod and the machine frame.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. When it is necessary to increase the angle between the tripod and the frame, the operator pulls the rope to rotate the pawl, causing it to separate from the ratchet. Since the pivot is connected to the frame, and under the weight of the frame, the frame rotates downwards. Then, the rope is released, and the elastic element drives the pawl to rotate and press against the ratchet, limiting the frame from continuing to rotate, thus increasing the angle between the tripod and the frame. When it is necessary to decrease the angle between the tripod and the frame, the operator pushes the connecting tube upwards, causing the frame to rotate and the pawl to press against different positions of the ratchet, thus decreasing the angle between the tripod and the frame. This completes the adjustment of the angle between the tripod and the frame. The structure is simple and easy to operate, making it convenient to adjust the angle between the tripod and the frame. 2. By setting a limiting plate, the abutment column is limited in the limiting groove to limit the movement of the abutment column, thereby limiting the movement of the connecting pipe, thus improving the stability of the frame rotation, and further improving the stability of the angle adjustment between the tripod and the frame. 3. By setting a clearance groove, it is possible to abut the abutting column at different positions. And by moving the support column upward away from the rotating end, the abutting column can drive the connecting pipe to move upward, thereby driving the frame to rotate slightly, so as to accurately adjust the angle between the tripod and the machine frame. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the tubular film unfolding device in the embodiments of this application; Figure 2 yes Figure 1 Enlarged diagram of part A in the diagram; Figure 3 This is another perspective schematic diagram of the overall structure of the cylindrical film unfolding device in the embodiments of this application; Figure 4 This is a partial exploded structural diagram of the tubular film unfolding device in the embodiments of this application.

[0028] Reference numerals: 1. Frame; 11. Limiting seat; 111. Seat body; 112. Limiting plate; 113. Limiting groove; 114. Rotating rod; 12. Threaded column; 2. Triangular frame; 21. Frame body; 22. Rotating shaft; 23. Connecting pipe; 24. Abutment column; 241. Relief groove; 25. Spring; 26. Support column; 261. First column; 262. Second column; 3. Limiting assembly; 31. Ratchet; 32. Pad; 33. Elastic element; 34. Pull rope; 35. Pedal. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0030] This application discloses a cylindrical film unfolding device.

[0031] Reference Figure 1 The tubular film unfolding device includes a frame 1, a tripod 2, and a limiting assembly 3. The frame 1 is placed horizontally on the ground. The tripod 2 includes a frame body 21, a rotating shaft 22, and a connecting pipe 23. The frame body 21 is triangular in shape and the angle between it and the frame 1 is acute, i.e., the angle between the frame body 21 and the horizontal plane is acute. The rotating shaft 22 is arranged along the length of the frame 1. The rotating shaft 22 is fixedly connected to the higher end of the frame body 21 and rotatably connected to the upper end of the frame 1 to realize the rotation between the frame body 21 and the frame 1. The connecting pipe 23 is installed on the lower side of the higher end.

[0032] Reference Figure 1 and Figure 2 The limiting component 3 includes a ratchet 31, a pawl 32, an elastic element 33, and a pull rope 34. The ratchet 31 is fixedly connected to one end of the rotating shaft 22, and the pawl 32 is rotatably connected to one side of the frame 1, and the pawl 32 meshes with the ratchet 31. In this embodiment, the elastic element 33 is a torsion spring, one end of which is fixedly connected to the pawl 32, and the other end is fixedly connected to the frame 1, so as to drive the pawl 32 to press against the ratchet 31, thereby limiting the frame 21 from rotating downward under the action of gravity. The pull rope 34 is a high-strength steel wire rope, one end of which is fixedly connected to the side of the pawl 32 away from the ratchet 31, and the other end is movably inserted into the frame 1. By pulling the pull rope 34, the pawl 32 can be rotated, causing the pawl 32 to disengage from the ratchet 31.

[0033] When it is necessary to increase the angle between the tripod 2 and the frame 1, the operator pulls the rope 34 to rotate the pawl 32, causing the pawl 32 to separate from the ratchet 31. Since the pivot 22 is rotatably connected to the frame 1, and under the weight of the frame 21, the frame 21 rotates downwards. The connecting pipe 23 applies force to the frame 21 to improve the stability of its downward rotation and to accurately control the angle of rotation. Afterwards, the operator releases the rope 34, and the elastic element 33 drives the pawl 32 to rotate and press against the ratchet 31, limiting further rotation of the frame 21. This completes the angle adjustment between the frame 21 and the frame 1, thereby increasing the angle between the tripod 2 and the frame 1.

[0034] When it is necessary to reduce the angle between tripod 2 and frame 1, the operator pushes the connecting pipe 23 upwards, causing the frame 21 to rotate upwards. This rotates the ratchet 31, causing the pawl 32 to engage with the ratchet 31 at different positions, thus adjusting the angle between the frame 21 and frame 1 and reducing the angle between them. Therefore, the angle between tripod 2 and frame 1 can be adjusted through the above operation. The structure is simple and easy to operate, requiring no installation or disassembly of tripod 2, making it convenient to adjust the angle between tripod 2 and frame 1.

[0035] Reference Figure 3 and Figure 4 In some embodiments, the tripod 2 further includes an abutment post 24 and a spring 25. The abutment post 24 is slidably connected to the connecting tube 23 in the direction of its length. The upper end of the spring 25 is fixedly connected to the connecting tube 23, and the lower end of the spring 25 is fixedly connected to the upper end of the abutment post 24, so as to drive the abutment post 24 away from the connecting tube 23, so that the abutment post 24 abuts against the frame 1 to support the frame 21, thereby reducing the force between the ratchet 31 and the pawl 32, reducing the wear of the ratchet 31 and the pawl 32, and thus improving the service life of the ratchet 31 and the pawl 32. It should be noted that after the abutment post 24 abuts against the frame 1, the elastic element 33 is compressed and will not drive the connecting tube 23 to move upward. That is, the frame 21 remains stably stationary after rotation, so as to ensure that the angle between the tripod 2 and the frame 1 remains unchanged during operation. The upper end of the connecting pipe 23 is rotatably connected to the frame 21. The axis of rotation of the connecting pipe 23 is parallel to the rotating shaft 22, so that the connecting pipe 23 is vertically set under the action of gravity, so that the abutting column 24 is in a vertical state, and the abutting column 24 can abut against the frame 1 more stably.

[0036] In some embodiments, a limiting seat 11 is installed on the frame 1. The limiting seat 11 includes a base 111, which is a hollow cylinder with an open top. An abutment post 24 abuts against the base 111, thus limiting the abutment post 24 within the base 111. In practical applications, when the frame 21 rotates, the connecting pipe 23 is rotatably connected to the frame 1, causing the connecting pipe 23 to move along the width direction of the frame 1. Since the abutment post 24 is abutting and limited within the base 111, the movement distance of the connecting pipe 23 can be limited, thereby limiting the rotation angle of the frame 21. This facilitates limiting the angle between the tripod 2 and the frame 1.

[0037] In some embodiments, a threaded post 12 is fixedly connected to the frame 1, and the lower end of the seat 111 is threaded to the threaded post 12. By rotating the seat 111, the seat 111 moves upward so that the abutment post 24 compresses the elastic element 33, so that the frame 21 is in a balanced state. At this time, if the seat 111 is rotated further, the connecting pipe 23 can be driven to move upward so as to drive the frame 21 to rotate slightly, thereby accurately adjusting the angle between the tripod 2 and the frame 1.

[0038] In some embodiments, the limiting seat 11 further includes a limiting plate 112, which is rotatably connected to the seat body 111 and has a limiting groove 113 on its upper side. The limiting groove 113 is arranged along the width direction of the frame 1, and the abutment post 24 is limited in the limiting groove 113. Since the abutment post 24 is limited in the limiting groove 113, the frame 21 limits the movement of the abutment post 24 during rotation, thereby limiting the movement of the connecting pipe 23, thus improving the stability of the frame 21 rotation, and further improving the stability of the angle adjustment between the tripod 2 and the frame 1. In addition, since the limiting plate 112 is rotatably connected to the seat body 111, the abutment post 24 can also be limited in the limiting groove 113 during the rotation of the seat body 111.

[0039] In some embodiments, the limiting seat 11 further includes two rotating rods 114, which are fixedly connected to the periphery of the seat body 111 and are evenly spaced along the circumference of the seat body 111, so that the operator can apply force to rotate the seat body 111 and thus make it easier to precisely adjust the angle between the tripod 2 and the frame 1.

[0040] In some embodiments, the tripod 2 further includes a support column 26, one end of which is rotatably connected to the lower side of the frame 21 away from the pivot 22, and the other end abuts against the abutment column 24. The support column 26 can further support the frame 21. At the same time, the support column 26 abuts against the abutment column 24, which can restrict the movement of the abutment column 24 during operation, so as to ensure that the tripod 2 and the frame 1 maintain an angle stability during operation, thereby improving the stability of the angle adjustment between the tripod 2 and the frame 1.

[0041] In some embodiments, the abutment post 24 has a clearance groove 241 along its length, and the support post 26 passes through the clearance groove 241 and abuts against the bottom wall of the clearance groove 241. Since the abutment post 24 moves in the vertical direction and the width direction of the frame 1, the clearance groove 241 facilitates the abutment post 24 at different positions. More importantly, by moving the support post 26 away from the rotating end upward, the abutment post 24 can drive the connecting pipe 23 to move upward, thereby driving the frame 21 to rotate slightly, which facilitates precise adjustment of the angle between the tripod 2 and the frame 1.

[0042] In some embodiments, the support column 26 includes a first column 261 and a second column 262. One end of the first column 261 is rotatably connected to the frame 21, and the second column 262 is threadedly connected to the other end of the first column 261. The first column 261 is away from the relief groove 241, and the second column 262 is located in the relief groove 241. This facilitates the support column 26 to pass through the relief groove 241 and can minimize the risk of the support column 26 dislodging from the relief groove 241.

[0043] Reference Figure 3 In some embodiments, the limiting component 3 further includes a pedal 35, with one end of the pull rope 34 away from the pawl 32 extending to the lower end of the frame 1. The pull rope 34 is fixedly connected to the pedal 35 for the operator to step on, thereby facilitating the pulling of the pull rope 34 and adjusting the angle between the tripod 2 and the frame 1. It should be noted that two limiting components 3 can be provided to improve the stability of the rotation limiting of the frame 21.

[0044] The implementation principle of this embodiment is as follows: When it is necessary to increase the angle between the tripod 2 and the frame 1, the operator pulls the rope 34 to rotate the pawl 32, causing the pawl 32 to separate from the ratchet 31. Since the shaft 22 is rotatably connected to the frame 1, and under the action of the weight of the frame 21, the frame 21 rotates downwards. The connecting pipe 23 applies force to the frame 21 to improve the stability of the downward rotation and to accurately control the angle of rotation. Afterwards, the operator releases the rope 34, and the elastic element 33 drives the pawl 32 to rotate and press against the ratchet 31, thus limiting the continued rotation of the frame 21 and completing the angle adjustment between the frame 21 and the frame 1, thereby increasing the angle between the tripod 2 and the frame 1.

[0045] When it is necessary to reduce the angle between tripod 2 and frame 1, the operator pushes the connecting pipe 23 upwards, causing the frame 21 to rotate upwards. This rotates the ratchet 31, causing the pawl 32 to engage with the ratchet 31 at different positions, thus adjusting the angle between the frame 21 and frame 1 and reducing the angle between them. Therefore, the angle between tripod 2 and frame 1 can be adjusted through the above operation. The structure is simple and easy to operate, requiring no installation or disassembly of tripod 2, making it convenient to adjust the angle between tripod 2 and frame 1.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tubular film unfolding device, characterized in that: The system includes a frame (1), a tripod (2), and a limiting assembly (3); the tripod (2) includes a frame body (21), a rotating shaft (22), and a connecting pipe (23); the rotating shaft (22) is arranged along the length of the frame (1) and located at one end of the frame body (21), and the rotating shaft (22) is rotatably connected to the upper end of the frame (1); the connecting pipe (23) is located on the lower side of the frame body (21) near the end of the rotating shaft (22); the limiting assembly (3) includes a ratchet (31) and a pawl (32). The elastic element (33) and the pull rope (34) are provided; the ratchet (31) is located at one end of the rotating shaft (22); the pawl (32) is rotatably connected to the frame (1); the elastic element (33) is located between the pawl (32) and the frame (1) to drive the pawl (32) to press against the ratchet (31) to restrict the frame (21) from rotating downward; one end of the pull rope (34) is located on the side of the pawl (32) away from the ratchet (31), and the other end is movably passed through the frame (1).

2. The tubular film unfolding device according to claim 1, characterized in that: The tripod (2) also includes an abutment post (24) and a spring (25). The upper end of the connecting tube (23) is rotatably connected to the frame (21). The abutment post (24) is slidably connected to the connecting tube (23). The spring (25) is located between the upper end of the abutment post (24) and the connecting tube (23) to drive the abutment post (24) away from the connecting tube (23) and abut against the frame (1).

3. The tubular film unfolding device according to claim 2, characterized in that: The frame (1) is provided with a limiting seat (11), the limiting seat (11) includes a seat body (111), and the abutting post (24) abuts and is located in the seat body (111).

4. The tubular film unfolding device according to claim 3, characterized in that: The frame (1) is provided with a threaded post (12), and the lower end of the seat (111) is threaded to the threaded post (12).

5. A tubular film unfolding device according to claim 4, characterized in that: The limiting seat (11) also includes a limiting plate (112), which is rotatably connected to the seat body (111). A limiting groove (113) is formed on the upper side of the limiting plate (112) along the width direction of the frame (1), and the abutting post (24) is limited in the limiting groove (113).

6. The tubular film unfolding device according to claim 4, characterized in that: The limiting seat (11) also includes two rotating rods (114), which are located on the periphery of the seat (111) and spaced apart along the circumference of the seat (111).

7. A tubular film unfolding device according to claim 2, characterized in that: The tripod (2) also includes a support column (26), one end of which is rotatably connected to the lower side of the frame (21) away from the pivot (22), and the other end abuts against the abutment column (24).

8. The tubular film unfolding device according to claim 7, characterized in that: The abutting post (24) has a relief groove (241) along its own length direction, and the supporting post (26) passes through the relief groove (241) and abuts against the bottom wall of the relief groove (241).

9. A tubular film unfolding device according to claim 8, characterized in that: The support column (26) includes a first column (261) and a second column (262). One end of the first column (261) is rotatably connected to the frame (21), and the second column (262) is threadedly connected to the other end of the first column (261) and located in the relief groove (241).

10. A tubular film unfolding device according to claim 1, characterized in that: The limiting assembly (3) also includes a pedal (35), and one end of the pull rope (34) away from the pawl (32) extends to the lower end of the frame (1) and is located on the pedal (35).

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