Edge folding device for plastic packaging bag

Abstract

The utility model belongs to the technical field of plastic packaging bag edge folding, and particularly relates to an edge folding device for a plastic packaging bag, which comprises a discharging mechanism and a receiving mechanism which are respectively arranged at two ends of the top surface of a rack, and further comprises a transition mechanism, the two inclined transition rotating rollers are symmetrically distributed and rotate around the center line of the inclined transition rotating rollers. The positioning wheel is rotationally mounted on the inner sides of the two inclined transition rotating rollers, and the positioning wheel and the two inclined transition rotating rollers form a V-shaped combined body; according to the utility model, through the arranged transition mechanism, the film is initially changed into a V shape after penetrating through the positioning wheel and the inclined transition rotating roller, and then penetrates through the inner side space of the two straight transition rotating rollers, so that the film is safely transited from a horizontal state to a folded state, and the problem that the film is torn and pulled apart is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic packaging bag hemming, and particularly relates to a hemming device for plastic packaging bags. Background Technique

[0002] With the increasing improvement of people's living standards, plastic packaging bags, which bring convenience to people, are used more and more frequently. When producing plastic packaging bags, they are generally folded from plastic films and then processed subsequently to form plastic packaging bags.

[0003] In the prior art, the Chinese utility model patent with the authorization announcement number of CN220297975U discloses "a hemming device for plastic packaging bags", which includes a mounting plate. One side of the top of the mounting plate is provided with a raw material cylinder, the top of the mounting plate on one side of the raw material cylinder is provided with a guiding mechanism, and the top of the mounting plate on the side of the guiding mechanism away from the raw material cylinder is provided with a pressing mechanism. Both ends of the pressing rod of the pressing mechanism are connected with a pressing bracket through bearings, and two groups of inserting rods are fixedly installed on the top of the pressing bracket. The inserting rods are inserted into the inside of the mounting block. By setting the pressing mechanism, the film is prevented from curling during the folding process.

[0004] For the hemming devices of the prior art including the above, although the film can be pressed, in actual use, after the film passes through the pressing mechanism, it directly changes from a horizontal state to a folded state, and its width will inevitably decrease. And because of the pressing effect of the pressing mechanism, the film is easily torn and broken during winding.

[0005] To solve the above problems, a hemming device for plastic packaging bags is proposed in this application. Utility Model Content

[0006] To solve the above problems existing in the prior art, the utility model provides a hemming device for plastic packaging bags, which has the characteristics of convenient use and high safety performance.

[0007] To achieve the above object, the utility model provides the following technical solution: A hemming device for plastic packaging bags includes a feeding mechanism and a winding mechanism respectively installed at both ends of the top surface of a frame, and further includes a transition mechanism, and the transition mechanism includes:

[0008] Inclined transition rollers, two of the inclined transition rollers are symmetrically distributed and rotate around their center lines;

[0009] Positioning wheels, the positioning wheels are rotatably installed inside the two inclined transition rollers and form a combination body with a "V" - shaped structure with the two inclined transition rollers.

[0010] As a preferred technical solution of the utility model, the transition mechanism further includes:

[0011] U-shaped bracket, and the U-shaped bracket is installed on the frame;

[0012] V-shaped mounting pieces, two of the V-shaped mounting pieces are symmetrically distributed, the positioning wheel is rotatably installed between the two V-shaped mounting pieces, and the inclined transition roller is rotatably installed between the U-shaped bracket and the V-shaped mounting piece.

[0013] As a preferred technical solution of the present invention, it further includes:

[0014] First limit block, and the first limit block is fixed on the frame;

[0015] Adjusting screw, the adjusting screw is installed on the first limit block by means of thread screwing, and the end of the adjusting screw penetrates through the first limit block and is rotatably connected to the U-shaped bracket by means of a bearing.

[0016] As a preferred technical solution of the present invention, it further includes:

[0017] Adjusting handle, and the adjusting handle is fixed at one end of the adjusting screw away from the U-shaped bracket.

[0018] As a preferred technical solution of the present invention, it further includes:

[0019] Second limit block, and the second limit block is fixed on the frame;

[0020] Guide rod, the guide rod is fixed on the U-shaped bracket and penetrates through the second limit block, and a limit disk is fixed on the extended end of the guide rod.

[0021] As a preferred technical solution of the present invention, the transition mechanism further includes:

[0022] Support plate, and the support plate is fixed on the U-shaped bracket;

[0023] Inverted L-shaped brackets, two of the inverted L-shaped brackets are symmetrically fixed on the support plate;

[0024] Straight transition rollers, two of the straight transition rollers are symmetrically distributed and rotatably installed between the horizontal part of the inverted L-shaped bracket and the support plate, and the length direction of the straight transition roller coincides with the vertical direction.

[0025] As a preferred technical solution of the present invention, the feeding mechanism includes:

[0026] Perforated mounting frames, two of the perforated mounting frames are symmetrically fixed on the frame;

[0027] A feeding roller, which is rotatably installed between two perforated mounting frames;

[0028] A first driving motor, which is fixed on the perforated mounting frame and used to drive the feeding roller to rotate.

[0029] As a preferred technical solution of the present utility model, the winding mechanism includes:

[0030] A top plate, which is supported and fixed on the frame by four diagonally distributed support legs;

[0031] A winding roller, the length direction of which coincides with the vertical direction and is rotatably installed between the frame and the top plate;

[0032] A second driving motor, which is fixed on the top plate and used to drive the winding roller to rotate.

[0033] As a preferred technical solution of the present utility model, the winding mechanism further includes:

[0034] Guide rollers, two of which are spaced apart and arranged on the front side of the winding roller, and the length direction of the guide rollers coincides with the vertical direction and is rotatably installed between the frame and the top plate.

[0035] Compared with the prior art, the beneficial effects of the present utility model are:

[0036] In the present utility model, through the provided transition mechanism, the film is initially changed into a "V" shape after passing through the positioning wheel and the inclined transition roller, and then passes through the inner space between the two straight transition rollers, so that the film is safely transitioned from a horizontal state to a folded state, avoiding the problem of tearing and breaking of the film.

[0037] Other additional advantages and beneficial effects of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. Description of the Drawings

[0038] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0039] Figure 1 is a schematic structural diagram of the present utility model;

[0040] Figure 2 is an axonometric structural diagram of the transition mechanism in the present utility model;

[0041] Figure 3 is an axonometric structural diagram of the winding mechanism in the present utility model.

[0042] In the figure: 1, frame; 2, feeding mechanism; 21, perforated mounting bracket; 22, feeding roller; 23, first driving motor; 3, transition mechanism; 31, U-shaped bracket; 32, V-shaped mounting piece; 33, positioning wheel; 34, inclined transition roller; 35, support plate; 36, inverted L-shaped bracket; 37, straight transition roller; 4, collecting mechanism; 41, support leg; 42, top plate; 43, guiding roller; 44, collecting roller; 45, second driving motor; 5, first limit block; 6, adjusting screw; 61, adjusting handle; 7, second limit block; 8, guiding rod; 81, limit disc. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] Please refer to Figures 1 - 3 , the present invention provides the following technical solutions: A hemming device for plastic packaging bags, including a feeding mechanism 2 and a collecting mechanism 4 respectively installed at both ends of the top surface of the frame 1, and further including a transition mechanism 3, and the transition mechanism 3 includes: an inclined transition roller 34 and a positioning wheel 33.

[0045] Specifically, as shown in Figure 1 and Figure 2 , in this embodiment, the two inclined transition rollers 34 are symmetrically distributed and rotate around their center lines. The positioning wheel 33 is rotatably installed inside the two inclined transition rollers 34 and forms a combination body with a "V" shape with the two inclined transition rollers 34. Therefore, when in use, the film is released by the feeding mechanism 2, and the film passes through the lower space of the positioning wheel 33 and the two inclined transition rollers 34. At this time, the film is initially changed into a "V" shape and continues to be conveyed.

[0046] Optionally, as shown in Figure 1 and Figure 2As shown, in this embodiment, the transition mechanism 3 further includes: a U-shaped bracket 31 and a V-shaped mounting piece 32. The U-shaped bracket 31 is mounted on the frame 1. The two V-shaped mounting pieces 32 are symmetrically distributed. The positioning wheel 33 is rotatably mounted between the two V-shaped mounting pieces 32. The inclined transition roller 34 is rotatably mounted between the U-shaped bracket 31 and the V-shaped mounting piece 32. Both the positioning wheel 33 and the inclined transition roller 34 are rotatably mounted through a rotating shaft and a bearing. And the inclined transition roller 34 is installed in an inclined manner. The positioning wheel 33 and the two inclined transition rollers 34 form a combination in a "V" shape. When the film passes through the lower space of the positioning wheel 33 and the two inclined transition rollers 34, it will become a "V" shape.

[0047] It should be noted that because the two inclined transition rollers 34 are not horizontally installed, the axis lines of the two inclined transition rollers 34 are not on the same straight line. Therefore, during the film conveying process, both the positioning wheel 33 and the two inclined transition rollers 34 can only rotate around their own axis lines.

[0048] It should be noted that in order to prevent the film from being scratched during the conveying process, arc chamfers are machined at the ends of the positioning wheel 33 and the two inclined transition rollers 34.

[0049] Preferably, Figure 1 and Figure 2 As shown, in this embodiment, it further includes: a first limit block 5 and an adjustment screw 6. The first limit block 5 is fixed on the frame 1. The adjustment screw 6 is installed on the first limit block 5 by means of screw thread engagement. And the end of the adjustment screw 6 passes through the first limit block 5 and is rotatably connected to the U-shaped bracket 31 by a bearing. When necessary, the adjustment screw 6 can be rotated to drive the U-shaped bracket 31 to move under the screw thread engagement, so as to adjust the horizontal orientation of the positioning wheel 33 and the two inclined transition rollers 34. Therefore, the hemming device of the present utility model is also applicable to the scenario of asymmetric hemming.

[0050] Preferably, Figure 1 and Figure 2 As shown, in this embodiment, it further includes: an adjustment handle 61. The adjustment handle 61 is fixed at one end of the adjustment screw 6 away from the U-shaped bracket 31. By providing the adjustment handle 61, it is easy to rotate the adjustment screw 6.

[0051] Preferably, Figure 1 and Figure 2As shown, in this embodiment, it further includes: a second limit block 7 and a guide rod 8. The second limit block 7 is fixed on the frame 1, the guide rod 8 is fixed on the U-shaped bracket 31 and penetrates through the second limit block 7, and a limit disc 81 is fixed on the extended end of the guide rod 8. Therefore, when adjusting the position of the U-shaped bracket 31, the U-shaped bracket 31 will drive the guide rod 8 to move, and the cooperation between the guide rod 8 and the second limit block 7 limits and guides the U-shaped bracket 31, improving the stability of the U-shaped bracket 31.

[0052] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, the transition mechanism 3 further includes: a support plate 35, an inverted L-shaped bracket 36 and a straight transition roller 37. The support plate 35 is fixed on the U-shaped bracket 31, two inverted L-shaped brackets 36 are symmetrically fixed on the support plate 35, two straight transition rollers 37 are symmetrically distributed and rotatably installed between the horizontal part of the inverted L-shaped bracket 36 and the support plate 35, and the length direction of the straight transition roller 37 coincides with the vertical direction. Therefore, after the film passes through the lower parts of the positioning wheel 33 and the two inclined transition rollers 34, it then passes through the inner space between the two straight transition rollers 37, and the straight transition rollers 37 are used to further guide the film. When the film passes through the inner space between the two straight transition rollers 37, the film is completely folded.

[0053] Optionally, by Figure 1 As shown, in this embodiment, the feeding mechanism 2 includes: a perforated mounting frame 21, a feeding roller 22 and a first driving motor 23. Two perforated mounting frames 21 are symmetrically fixed on the frame 1, the feeding roller 22 is rotatably installed between the two perforated mounting frames 21, and the first driving motor 23 is fixed on the perforated mounting frame 21 for driving the feeding roller 22 to rotate. The feeding roller 22 is used to provide the film. When folding the edge, the first driving motor 23 is started to drive the feeding roller 22 to rotate and release the film.

[0054] It should be noted that after the film is released from the feeding roller 22, it needs to pass through the lower parts of the positioning wheel 33 and the two inclined transition rollers 34. Therefore, the installation height of the feeding roller 22 should be higher than that of the inclined transition rollers 34, so as to facilitate the film to fit the positioning wheel 33 and the two inclined transition rollers 34 and make the film output in a "V" shape.

[0055] Optionally, by Figure 1 and Figure 3 As shown, in this embodiment, the winding mechanism 4 includes: a top plate 42, a winding roller 44 and a second driving motor 45. The top plate 42 is supported and fixed on the frame 1 by four support legs 41 distributed diagonally. The length direction of the winding roller 44 coincides with the vertical direction and is rotatably installed between the frame 1 and the top plate 42. The second driving motor 45 is fixed on the top plate 42 for driving the winding roller 44 to rotate. The second driving motor 45 is started to drive the winding roller 44 to rotate, and the folded film is wound by the winding roller 44.

[0056] Preferably, as shown by Figure 1 and Figure 3 In this embodiment, the material receiving mechanism 4 further includes: guiding rollers 43. Two guiding rollers 43 are spaced apart and distributed on the front side of the material receiving roller 44. The length direction of the guiding rollers 43 coincides with the vertical direction and is rotatably installed between the frame 1 and the top plate 42. In the present invention, two guiding rollers 43 are provided. In fact, there can be more guiding rollers 43, and theoretically at least two. The folded film passes through the inner sides of the two guiding rollers 43 and is then wound by the material receiving roller 44. When the film passes through the guiding rollers 43, it is output in an "S" shape, further improving the folding degree of the film.

[0057] It should be noted that the first driving motor 23 and the second driving motor 45 are both commercially available conventional devices with built-in power switches. Those skilled in the art can make conventional selections according to actual needs. Their working principles are common knowledge well-known to those skilled in the art and have been fully disclosed in the prior art, so no further elaboration will be provided herein.

[0058] The circuit connection involved in the present invention is a common means adopted by those skilled in the art and can obtain technical inspiration through a limited number of experiments, belonging to the widely used prior art.

[0059] The components not described in detail herein are prior art.

[0060] Working principle and usage process of the present invention: When the folding device of the present invention is in use, start the first driving motor 23 to drive the unwinding roller 22 to rotate and release the film;

[0061] The film passes through the lower space between the positioning wheel 33 and the two inclined transition rollers 34. At this time, the film is initially changed into a "V" shape and continues to be conveyed;

[0062] After the film passes through the lower part of the positioning wheel 33 and the two inclined transition rollers 34, it then passes through the inner space between the two straight transition rollers 37. The straight transition rollers 37 are used to further guide the film. When the film passes through the inner space between the two straight transition rollers 37, the film is completely folded;

[0063] The folded film passes through the inner sides of the two guiding rollers 43. When the film passes through the guiding rollers 43, it is output in an "S" shape, further improving the folding degree of the film;

[0064] Finally, start the second driving motor 45 to drive the material receiving roller 44 to rotate, and wind the folded film with the material receiving roller 44;

[0065] When necessary, the adjusting screw 6 can be rotated to drive the U-shaped bracket 31 to move under the action of thread engagement, so as to adjust the horizontal orientation of the positioning wheel 33 and the two inclined transition rollers 34. Therefore, the hemming device of the present utility model is also applicable to the scenario of asymmetric hemming;

[0066] Through the provided transition mechanism 3 of the present utility model, the film is initially changed into a "V" shape after passing through the positioning wheel 33 and the inclined transition rollers 34, and then passes through the inner space of the two straight transition rollers 37, so that the film is safely transitioned from a horizontal state to a folded state, avoiding the problem of tearing and breaking of the film.

[0067] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A folding device for a plastic packaging bag, comprising a material discharging mechanism (2) and a material receiving mechanism (4) respectively mounted on two ends of a top surface of a frame (1), characterized in that: It also includes a transition mechanism (3), and the transition mechanism (3) includes: Oblique transition rollers (34), wherein two inclined transition rollers (34) are symmetrically distributed and rotate around their center lines; A positioning wheel (33), wherein the positioning wheel (33) is rotatably mounted on the inner sides of the two inclined transition rollers (34) and forms a combination of a "V"-shaped structure with the two inclined transition rollers (34).

2. A folding device for a plastic packaging bag according to claim 1, characterized in that: The transition mechanism (3) further comprises: A U-shaped bracket (31), wherein the U-shaped bracket (31) is mounted on the frame (1); V-shaped mounting plates (32), two of the V-shaped mounting plates (32) are symmetrically distributed, the positioning wheel (33) is rotatably mounted between the two V-shaped mounting plates (32), and the inclined transition roller (34) is rotatably mounted between the U-shaped bracket (31) and the V-shaped mounting plates (32).

3. A folding device for a plastic packaging bag according to claim 2, characterized in that: Also includes: A first limit block (5), the first limit block (5) being fixed on the frame (1); An adjusting screw (6), wherein the adjusting screw (6) is mounted on the first limit block (5) by means of a threaded engagement, and an end of the adjusting screw (6) passes through the first limit block (5) and is rotatably connected to the U-shaped bracket (31) by means of a bearing.

4. A folding device for a plastic packaging bag according to claim 3, characterized in that: Also includes: An adjustment handle (61) is fixed to an end of the adjustment screw rod (6) away from the U-shaped bracket (31).

5. The folding device for plastic packaging bags according to claim 2, characterized in that: Also includes: A second limiting block (7), the second limiting block (7) being fixed on the frame (1); A guide rod (8), the guide rod (8) being fixed on the U-shaped bracket (31) and passing through the second limiting block (7), and a limiting plate (81) being fixed on the protruding end of the guide rod (8).

6. The folding device for a plastic packaging bag according to claim 2, characterized in that: The transition mechanism (3) further comprises: A support plate (35), wherein the support plate (35) is fixed on the U-shaped bracket (31); An inverted L-shaped bracket (36), wherein two inverted L-shaped brackets (36) are symmetrically fixed on the support plate (35); Straight transition rollers (37), two straight transition rollers (37) are symmetrically distributed and rotatably mounted between the horizontal portion of the inverted L-shaped bracket (36) and the support plate (35), and the length direction of the straight transition rollers (37) coincides with the vertical direction.

7. The folding device for a plastic packaging bag according to claim 1, characterized in that: The material discharge mechanism (2) comprises: A mounting frame with holes (21), wherein two mounting frames with holes (21) are symmetrically fixed on the frame (1); A material discharge roller (22), the material discharge roller (22) being rotatably mounted between the two perforated mounting frames (21); A number one driving motor (23), the number one driving motor (23) being fixed on the perforated mounting frame (21) and used for driving the unloading roller (22) to rotate.

8. The folding device for a plastic packaging bag according to claim 1, characterized in that: The material receiving mechanism (4) comprises: A top plate (42), the top plate (42) being supported and fixed on the frame (1) by four diagonally distributed support legs (41); a receiving roller (44), wherein the length direction of the receiving roller (44) coincides with the vertical direction and the receiving roller (44) is rotatably mounted between the frame (1) and the top plate (42); A second drive motor (45), the second drive motor (45) being fixed on the top plate (42) and used for driving the receiving roller (44) to rotate.

9. A folding device for a plastic packaging bag according to claim 8, characterized in that: The material receiving mechanism (4) further comprises: Guide rollers (43), two guide rollers (43) are spaced apart and distributed in front of the receiving roller (44), the length direction of the guide rollers (43) coincides with the vertical direction and the guide rollers (43) are rotatably mounted between the frame (1) and the top plate (42).

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