Device for preventing release film of express bag from being reversely folded and pasted

Abstract

The utility model belongs to the technical field of release film unwinding, and particularly relates to a device for preventing a release film of an express bag from being reversely folded and pasted, which comprises a rack, two mounting frames are fixedly connected to the lower part of the front surface of the rack, a winding roller is jointly and rotatably connected between the two mounting frames, the release film is wound on the outer side of the winding roller, and the release film is wound on the outer side of the winding roller. An anti-reverse-folding mechanism is jointly arranged between the two mounting frames, a hollow shell is fixedly connected to the side face of one mounting frame, and a positioning pin is slidably connected to the interior of the hollow shell. According to the utility model, the grooves and the winding roller for accommodating the release film are arranged at the two mounting racks on the rack, then the annular positioning groove is formed in the roller body of the winding roller, and finally the locking pin which stretches out and draws back by the spring is arranged beside the positioning groove, so that the locking pin is matched with the positioning pin, and the normal unwinding of the winding roller is not influenced, and meanwhile, the winding roller is prevented from being damaged. And the mounting position and direction of the winding roller are also positioned, so that the accident that the release film is pasted reversely is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of release film unwinding, in particular to a device for preventing a release film of an express bag from being folded back and pasted backward. Background Art

[0002] Courier bag release film is a protective film used on the surface of courier bags, which can effectively protect the courier bags from being contaminated, scratched or damaged. This release film is usually a transparent film that can be easily torn off without leaving any residue. The utility model patent with announcement number CN212654605U discloses a film-releasing mechanism of an express bag packaging machine, including an input roller group, a winding roller group and a rubber roller. The winding roller group includes a fixed winding roller arranged at the top and a movable winding roller arranged at the bottom. The movable winding roller can be movably arranged on a shell body up and down. The film between the input roller group and the rubber roller bypasses the fixed winding roller and the movable winding roller in turn for pre-storage. When the rubber roller pulls the film, the film decreases and the movable winding roller is pulled to make it rise. When the input roller group releases the film, the film increases and the movable winding roller is put down to make it fall. A first sensor for detecting the height of the movable winding roller is arranged on the side of the movable winding roller. When the movable winding roller rises and leaves the sensing range of the first sensor, the first sensor feedback signal starts the input roller group to release the film. When the movable winding roller descends to the first sensor and is sensed, the first sensor feedback signal stops the input roller group from releasing the film. However, the existing release film is prone to folding during the unwinding process, which affects the subsequent operation of attaching the release film to the packaging bag. In addition, after the release film roll is installed on the frame, it is easy to lose the front and back sides, resulting in the accident of attaching the film upside down. Therefore, improvements are needed. Utility Model Content

[0003] The utility model aims to provide a device for preventing the release film of an express bag from being folded back and pasted upside down, thereby solving the problem that the existing release film is easily folded back during the unwinding process, and at the same time solves the problem that the release film roll is easily confused about the front and back after being installed on the frame, thus causing the accident of pasting upside down.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for preventing the release film of an express bag from being folded back and pasted reversely, comprising a frame, two mounting frames are fixedly connected to the lower front part of the frame, and a winding roller is rotatably connected between the two mounting frames, a release film is wound around the outer side of the winding roller, and an anti-folding mechanism is commonly arranged between the two mounting frames, one of the mounting frames is fixedly connected to a hollow shell on the side surface, a positioning pin is slidably connected to the interior of the hollow shell, a positioning groove is provided on the roller body of the winding roller, one end of the positioning pin is slidably connected to the positioning groove, and the other end of the winding roller is fixedly connected to a connecting piece, the connecting piece contacts the hollow shell, a pull ring is fixedly connected to the surface of the connecting piece, a block is fixedly connected to the middle section of the pin body of the positioning pin, and a spring is sleeved on the outer side of the pin body of the positioning pin.

[0005] Preferably, one end of the spring 1 is fixedly connected to the stopper, and the other end of the spring 1 is fixedly connected to the inner surface of the hollow shell. By setting the spring 1, the elastic force can be applied to the positioning pin through the stopper.

[0006] Preferably, a ball is disposed on the side of the stopper, and the ball contacts the inner surface of the hollow shell. The relative friction between the stopper and the hollow shell can be reduced by disposing the ball.

[0007] Preferably, a guide roller 1 is fixedly connected between the two mounting frames, a guide roller 2 is fixedly connected to the frame, and the release film is wound around the outer sides of the guide roller 1 and the guide roller 2. The setting of the guide roller 1 and the guide roller 2 has a guiding effect on the travel direction of the release film.

[0008] Preferably, the anti-bending mechanism comprises a shell fixedly connected between two mounting frames, a sliding rod slidably connected to the inner side of the shell, a stopper fixedly connected to one end of the sliding rod, and the stopper contacts the release film, a pull button fixedly connected to the other end of the sliding rod, a guide plate fixedly connected to the middle section of the rod body of the sliding rod, a guide rod slidably connected to the inner side of the shell, the guide rod penetrates the guide plate and is slidably connected to the guide plate, and a spring 2 is sleeved on the outer side of the rod body of the guide rod. The anti-bending mechanism can flatten the release film on the roller to prevent the occurrence of folded edges.

[0009] Preferably, one end of the second spring is fixedly connected to the guide plate, and the other end of the second spring is fixedly connected to the inner surface of the housing. By setting the second spring, the reaction force can be applied to the stop seat through the guide plate and the slide bar.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] 1. The utility model provides grooves at two mounting frames on the frame for accommodating the roll of the release film, then provides an annular positioning groove on the roll body of the roll, and finally provides a locking pin which is retracted and extended by a spring beside the positioning groove. In this way, through the cooperation of the locking pin and the positioning pin, the installation position and direction of the roll are also positioned without affecting the normal unwinding of the roll, thereby preventing the accident of the release film being pasted upside down.

[0012] 2. The utility model sets an anti-bending mechanism between two mounting frames. The anti-bending mechanism contains a slide bar elastically supported by a spring. A stopper is set at the end of the slide bar. The stopper abuts against the release film to flatten it and prevent the edge from being folded when unwinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a three-dimensional diagram of the overall structure of the utility model;

[0014] Figure 2 For the utility model Figure 1 A top sectional view of

[0015] Figure 3 For the utility model Figure 2 A magnified view of the structure of part A;

[0016] Figure 4 For the utility model Figure 1 The local structure of the three-dimensional Figure 1 ;

[0017] Figure 5 For the utility model Figure 1 The local structure of the three-dimensional Figure 2 ;

[0018] Figure 6 For the utility model Figure 1 The local structure of the three-dimensional Figure 3 .

[0019] In the figure: 1. frame; 2. mounting frame; 3. winding roller; 4. release film; 5. anti-bending mechanism; 6. hollow shell; 7. positioning pin; 8. positioning groove; 9. connecting piece; 10. pull ring; 11. block; 12. ball; 13. spring 1; 14. guide roller 1; 15. guide roller 2; 51. shell; 52. sliding rod; 53. block seat; 54. guide plate; 55. guide rod; 56. spring 2; 57. pull button. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-6 A device for preventing the release film of an express bag from being folded and pasted reversely comprises a frame 1, two mounting frames 2 are fixedly connected to the lower front part of the frame 1, and a roller 3 is connected and rotated together between the two mounting frames 2, a release film 4 is wound around the outer side of the roller 3, a hollow shell 6 is fixedly connected to the side of one of the mounting frames 2, a positioning pin 7 is slidably connected to the inside of the hollow shell 6, a positioning groove 8 is opened on the roller body of the roller 3, one end of the positioning pin 7 is slidably connected to the positioning groove 8, and a connecting piece 9 is fixedly connected to the other end of the roller 3, and the connecting piece 9 is in contact with the hollow shell 6.

[0022] See also Figure 3 and Figure 5 , a pull ring 10 is fixedly connected to the surface of the connecting piece 9, a stopper 11 is fixedly connected to the middle section of the pin body of the positioning pin 7, and a spring 13 is sleeved on the outer side of the pin body of the positioning pin 7. One end of the spring 13 is fixedly connected to the stopper 11, and the other end of the spring 13 is fixedly connected to the inner surface of the hollow shell 6. Through the setting of the spring 13, the elastic force can be applied to the positioning pin 7 through the stopper 11. A ball 12 is set on the side of the stopper 11, and the ball 12 contacts the inner surface of the hollow shell 6. Through the setting of the ball 12, the relative friction between the stopper 11 and the hollow shell 6 can be reduced. A guide roller 14 is fixedly connected between the two mounting frames 2, and a guide roller 2 15 is fixedly connected to the frame 1, and the release film 4 is wound around the outer sides of the guide roller 14 and the guide roller 2 15. Through the setting of the guide roller 14 and the guide roller 2 15, the travel direction of the release film 4 has a guiding effect.

[0023] See also Figure 1 , Figure 2 , Figure 6 , an anti-bending mechanism 5 is provided between the two mounting frames 2. The anti-bending mechanism 5 can flatten the release film 4 on the roll 3 to prevent the edge from being folded. , the anti-bending mechanism 5 includes a housing 51 fixedly connected between the two mounting frames 2. A slide bar 52 is slidably connected to the inner side of the housing 51. A stopper 53 is fixedly connected to one end of the slide bar 52, and the stopper 53 contacts the release film 4. A button 57 is fixedly connected to the other end of the slide bar 52. A guide plate 54 is fixedly connected to the middle section of the slide bar 52. A guide bar 55 is slidably connected to the inner side of the housing 51. The guide bar 55 penetrates the guide plate 54 and is slidably connected to the guide plate 54. A spring 2 56 is sleeved on the outer side of the guide bar 55. One end of the spring 2 56 is fixedly connected to the guide plate 54, and the other end of the spring 2 56 is fixedly connected to the inner surface of the housing 51. By setting the spring 2 56, the reaction force can be applied to the stopper 53 through the guide plate 54 and the slide bar 52.

[0024] The specific implementation process of the utility model is as follows: when in use, first place the reel 3 with the release film 4 on the two mounting frames 2, and one end of the reel 3 with the positioning groove 8 is located on the right, and then the positioning pin 7 is controlled by the pull ring 10 to be inserted horizontally into the positioning groove 8. In this way, the installation position and direction of the reel 3 are also positioned without affecting the normal unwinding of the reel 3, thereby preventing the accident of the release film 4 being pasted upside down; in addition, the slide bar 52 is pulled by the pull button 57, so that the stop seat 53 at the end of the slide bar 52 is in contact with the release film 4, which has a flattening effect on it, thereby preventing the edge from being folded when unwinding.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing a release film of a courier bag from being folded back and pasted backwards, comprising a frame (1), characterized in that: Two mounting frames (2) are fixedly connected to the lower front part of the frame (1), and a winding roller (3) is rotatably connected between the two mounting frames (2), a release film (4) is wound around the outer side of the winding roller (3), and an anti-bending mechanism (5) is commonly arranged between the two mounting frames (2), a hollow shell (6) is fixedly connected to the side of one of the mounting frames (2), a positioning pin (7) is slidably connected to the inside of the hollow shell (6), a positioning groove (8) is provided on the roller body of the winding roller (3), one end of the positioning pin (7) is slidably connected to the positioning groove (8), and the other end of the winding roller (3) is fixedly connected to a connecting piece (9), the connecting piece (9) is in contact with the hollow shell (6), and a pull ring (10) is fixedly connected to the surface of the connecting piece (9), a stopper (11) is fixedly connected to the middle section of the pin body of the positioning pin (7), and a spring (13) is sleeved on the outer side of the pin body of the positioning pin (7).

2. A device for preventing the release film of a courier bag from being folded back and pasted according to claim 1, characterized in that: One end of the spring one (13) is fixedly connected to the stopper (11), and the other end of the spring one (13) is fixedly connected to the inner surface of the hollow shell (6).

3. The device for preventing the release film of a courier bag from being folded back and pasted according to claim 1, characterized in that: A ball (12) is arranged on the side of the stopper (11), and the ball (12) contacts the inner surface of the hollow shell (6).

4. The device for preventing the release film of a courier bag from being folded back and pasted backwards according to claim 1, characterized in that: A guide roller 1 (14) is fixedly connected between the two mounting frames (2), a guide roller 2 (15) is fixedly connected to the frame (1), and the release film (4) is wound around the outer sides of the guide roller 1 (14) and the guide roller 2 (15).

5. The device for preventing the release film of a courier bag from being folded back and pasted backwards according to claim 1, characterized in that: The anti-bending mechanism (5) comprises a shell (51) fixedly connected between two mounting frames (2); a slide rod (52) is slidably connected to the inner side of the shell (51); one end of the slide rod (52) is fixedly connected to a stopper (53), and the stopper (53) contacts the release film (4); the other end of the slide rod (52) is fixedly connected to a pull button (57); the middle section of the rod body of the slide rod (52) is fixedly connected to a guide plate (54); the inner side of the shell (51) is slidably connected to a guide rod (55); the guide rod (55) penetrates the guide plate (54) and is slidably connected to the guide plate (54); a spring 2 (56) is sleeved on the outer side of the rod body of the guide rod (55).

6. The device for preventing the release film of a courier bag from being folded back and pasted backwards according to claim 5, characterized in that: One end of the second spring (56) is fixedly connected to the guide plate (54), and the other end of the second spring (56) is fixedly connected to the inner surface of the housing (51).

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