A film winding and unwinding device

Abstract

This utility model discloses a stretch film dispensing device, including a base frame. A through-hole is formed in the vertical portion of the base frame. Vertical holes are formed at both the top and bottom of the through-hole. A pin is inserted through the through-hole and the vertical holes. The pin passes through a positioning hole, which is located on a handle. The handle is fixed to the middle of one side of a mounting plate. A track window is formed at one end of the mounting plate. A locking bolt is inserted through the track window. A locking nut is installed at one end of the locking bolt, and a side plate is fixed to the other end of the locking bolt. A limit plate is rotatably mounted on one side of the side plate via a rotating shaft. A stabilizing hole is formed at the top end of the mounting plate. This stretch film dispensing device adopts a novel structural design, which not only stably positions stretch film rolls of different widths but also features a split design, allowing for flexible selection between handheld and fixed placement depending on the actual usage environment and packaging requirements, thus enhancing its applicability.

Description

Technical Field

[0001] This utility model relates to the field of stretch film packaging technology, specifically a stretch film dispensing device. Background Technology

[0002] Stretch film, also known as stretch film, is a type of plastic film widely used in logistics, warehousing, and packaging. It is mainly used to fix and protect goods, and also has the effects of dustproofing, moisture-proofing, and pollution prevention, while reducing packaging costs.

[0003] Existing stretch film dispensing devices, such as the Chinese utility model patent CN218113155U entitled "A Stretch Film Dispensing Device," include a mounting frame with a U-shaped structure. A handle is mounted at the center of the rear end of the mounting frame, and a hanging ring is mounted at the rear end of the handle. Clamping mechanisms are movably connected to the inner left and right walls of the mounting frame via pivots. A protective cover is provided between the two clamping mechanisms. The protective cover has a three-quarter cylindrical shape, and several plastic serrations are mounted on the front of its outer surface in a linear array. A limiting ring is installed on the inner wall of the protective cover, located below the plastic serrations. This device has a limited adjustable range for its clamping mechanisms, making it unable to stably position stretch film rolls of different widths. Furthermore, it can only be used by hand, resulting in a single operation method that cannot adapt to different working environments and packaging requirements. To address these issues, an innovative design based on existing waterproof mobile phone bags is urgently needed. Utility Model Content

[0004] The purpose of this utility model is to provide a stretch film feeding device to solve the problems mentioned in the background art, such as the small adjustable range of the clamping mechanism of the existing device, the inability to stably position stretch film rolls of different widths, the limitation of hand-held operation, the single operation mode, and the inability to adapt to different working environments and packaging requirements.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a film spreading device, comprising a base frame, wherein a vertical portion of the base frame has a through-hole, and vertical holes are provided at the top and bottom of the through-hole. A pin is installed through the through-hole and the vertical holes, and the pin passes through a positioning hole. The positioning hole is located on a handle, and the handle is fixed to the middle of one side of a mounting plate. A track window is provided at one end of one side of the mounting plate, and a locking bolt is installed through the track window. A locking nut is installed at one end of the locking bolt, and a side plate is fixed at the other end of the locking bolt. A limit plate is rotatably installed on one side of the side plate via a rotating shaft. A stabilizing hole is provided at the top end of the mounting plate, and a movable column is installed through the stabilizing hole. The top and bottom surfaces of the movable column are connected and fixed to the top of a support spring, and the bottom end of the support spring is connected and fixed to the mounting plate. A cutter is fixed to the bottom end of the movable column.

[0006] Preferably, the base frame has an "L" shape when viewed from the front, and the vertical portion of the base frame has horizontally spaced insertion holes at equal intervals.

[0007] Preferably, the track window, locking bolt, locking nut, and side plate are symmetrically distributed about the center of the mounting plate, and the horizontal center of the vertical part of the mounting plate is on the same horizontal plane as the horizontal center of the locking bolt and the side plate.

[0008] Preferably, the locking bolt and the track window are slidably connected, and the length of the track window in its bottom view is greater than 1 / 4 of the length of the mounting plate in its bottom view.

[0009] Preferably, the bottom view of the limiting plate has a "T" shaped cross section, and the diameter of the disc-shaped structure of the limiting plate is greater than 3 / 4 of the length of the vertical part of the mounting plate.

[0010] Preferably, the movable column and the stabilizing hole are slidably connected, the front view cross-sectional shape of the movable column is "T" shaped, and the movable columns are symmetrically distributed about the center of the cutter.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the stretch film feeding device adopts a novel structural design, which can not only stably position stretch film rolls of different widths, but also adopts a split design, which can flexibly choose handheld use or fixed placement use according to the actual use environment and packaging requirements, making it more versatile.

[0012] 1. Through the structural design of mounting plate, track window, locking bolt, locking nut and side plate, the spacing of symmetrically distributed limiting plates can be flexibly and widely adjusted to stably position the wrapping film rolls of different widths and ensure the stability of the wrapping film rolls during unwinding.

[0013] 2. The structural design of the mounting plate, including the insertion hole, vertical hole, pin, positioning hole, and handle, not only allows for stable connection and fixation with the base frame, but also enables convenient adjustment of the installation height. It can also be detached for handheld use, greatly improving its versatility. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present invention;

[0015] Figure 2 This is a top view of the structure of this utility model;

[0016] Figure 3 This is a frontal cross-sectional view of the present invention.

[0017] Figure 4 This is a bottom view sectional structural diagram of the handle and mounting plate of this utility model.

[0018] In the diagram: 1. Base frame; 2. Insertion hole; 3. Vertical hole; 4. Pin; 5. Positioning hole; 6. Handle; 7. Mounting plate; 8. Track window; 9. Locking bolt; 10. Locking nut; 11. Side plate; 12. Rotating shaft; 13. Limiting plate; 14. Stabilizing hole; 15. Movable column; 16. Support spring; 17. Cutter. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a film spreading device, including a base frame 1, an insertion hole 2, a vertical hole 3, a pin 4, a positioning hole 5, a handle 6, a mounting plate 7, a track window 8, a locking bolt 9, a locking nut 10, a side plate 11, a rotating shaft 12, a limiting plate 13, a stabilizing hole 14, a movable column 15, a support spring 16, and a cutter 17. The vertical portion of the base frame 1 has an insertion hole 2. Vertical holes 3 are provided at both the top and bottom of the insertion hole 2. A pin 4 is installed through the insertion hole 2 and the vertical hole 3. The pin 4 passes through the positioning hole 5, which is located on the handle 6. 6 is fixed to the middle of one side of the mounting plate 7. A track window 8 is opened at one end of the mounting plate 7. A locking bolt 9 is installed through the track window 8. A locking nut 10 is installed at one end of the locking bolt 9. A side plate 11 is fixed at the other end of the locking bolt 9. A limit plate 13 is rotatably installed on one side of the side plate 11 through a rotating shaft 12. A stabilizing hole 14 is opened at the top end of the mounting plate 7. A movable column 15 is installed through the stabilizing hole 14. The top and bottom surfaces of the movable column 15 are connected and fixed to the top of the support spring 16. The bottom end of the support spring 16 is connected and fixed to the mounting plate 7. A cutter 17 is fixed to the bottom end of the movable column 15.

[0021] In this example, the base frame 1 has an "L" shape when viewed from the front. The vertical part of the base frame 1 has horizontally spaced insertion holes 2. The above structural design allows the base frame 1 to be stably supported, and the handle 6 can be inserted into different insertion holes 2 to change the working height.

[0022] The track window 8, locking bolt 9, locking nut 10 and side plate 11 are all symmetrically distributed about the center of the mounting plate 7. The horizontal center of the vertical part of the mounting plate 7 is on the same horizontal plane as the horizontal center of the locking bolt 9 and the side plate 11. The above structural design makes the installation stability of the side plate 11 high and provides a stable installation and adjustment base for the limiting plate 13.

[0023] The locking bolt 9 is slidably connected to the track window 8. The length of the track window 8 from below is greater than 1 / 4 of the length of the mounting plate 7 from below. The above structural design allows the working distance between the symmetrically distributed side plates 11 and the limiting plate 13 to be adjusted significantly.

[0024] The bottom view of the limiting plate 13 has a "T" shaped cross section. The diameter of the disc-shaped structure of the limiting plate 13 is greater than 3 / 4 of the length of the vertical part of the mounting plate 7. The above structural design enables the limiting plate 13 to squeeze and position winding film rolls of different diameters.

[0025] The movable column 15 and the stabilizing hole 14 are slidably connected. The front view cross section of the movable column 15 is "T" shaped. The movable column 15 is symmetrically distributed about the center of the cutter 17. The above structural design allows the movable column 15 to move stably vertically along the stabilizing hole 14 with the cutter 17 when it is pressed.

[0026] Working principle: When in fixed use, handle 6 as... Figure 3 Insert the plug into the appropriate height socket 2 as shown. The pin 4 passes through the positioning hole 5 to lock the handle 6. Place the wrapping film roll into the socket. Figure 4 Between the symmetrically distributed limiting plates 13, the symmetrically distributed side plates 11, along with the locking bolts 9, slide along the track window 8 towards both ends of the stretch film roll until the columnar structure at the end of the limiting plate 13 is inserted into the cylindrical structure in the middle of the stretch film roll, and the side of the disc-shaped part of the limiting plate 13 is in contact with the end of the cylindrical structure in the middle of the stretch film roll. The locking nut 10 is rotated to press the mounting plate 7, fixing the position of the side plates 11 and the limiting plates 13. The stretch film roll and the limiting plates 13 can rotate stably under the action of the rotating shaft 12, pulling out the stretch film to package the items. After packaging, the movable column 15 is pressed down, and the movable column 15 moves down to compress the support spring 16 and push the cutter 17 to cut the stretch film.

[0027] When using it by hand, simply pull the pin 4 out of the positioning hole 5 and the handle 6 out of the insertion hole 2. Hold the handle 6 and move the mounting plate 7 to pull out the stretch film for packaging items. This is the working principle of the stretch film dispensing device.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A film unwinding device, comprising a chassis (1), characterized in that: The base frame (1) has a through-hole (2) in its vertical section. The top and bottom of the through-hole (2) are each provided with a vertical hole (3). A pin (4) is installed through the through-hole (2) and the vertical hole (3). The pin (4) passes through a positioning hole (5). The positioning hole (5) is located on a handle (6). The handle (6) is fixed to the middle of one side of the mounting plate (7). A track window (8) is provided at one end of one side of the mounting plate (7). A locking bolt (9) is installed through the track window (8). One end of the locking bolt (9) is fitted with... There is a locking nut (10), and a side plate (11) is fixed to the other end of the locking bolt (9). A limit plate (13) is rotatably installed on one side of the side plate (11) via a rotating shaft (12). A stabilizing hole (14) is opened at the top end of the mounting plate (7). A movable column (15) is installed through the stabilizing hole (14). The top and bottom surfaces of the movable column (15) are connected and fixed to the top end of the support spring (16). The bottom end of the support spring (16) is connected and fixed to the mounting plate (7). A cutter (17) is fixed to the bottom end of the movable column (15).

2. The film unwinding device according to claim 1, characterized in that: The base frame (1) has an "L" shape when viewed from the front, and the vertical part of the base frame (1) has horizontally spaced insertion holes (2).

3. The film unwinding device according to claim 1, wherein: The track window (8), locking bolt (9), locking nut (10) and side plate (11) are all symmetrically distributed about the center of the mounting plate (7). The horizontal center of the vertical part of the mounting plate (7) is on the same horizontal plane as the horizontal center of the locking bolt (9) and the side plate (11).

4. The film feeding device according to claim 1, characterized in that: The locking bolt (9) is slidably connected to the track window (8), and the length of the track window (8) in the bottom view is greater than 1 / 4 of the length of the mounting plate (7) in the bottom view.

5. The film feeding device according to claim 1, characterized in that: The bottom view of the limiting plate (13) is T-shaped, and the diameter of the disc-shaped structure of the limiting plate (13) is greater than 3 / 4 of the length of the vertical part of the mounting plate (7).

6. The film feeding device according to claim 1, characterized in that: The movable column (15) and the stabilizing hole (14) are slidably connected. The front view cross-section of the movable column (15) is "T" shaped. The movable column (15) is symmetrically distributed about the center of the cutter (17).

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