Local opening folding device for middle-sealed bag body

Abstract

The utility model relates to the field of paper bag making machines, and discloses a middle sealing bag body local opening folding device which comprises an opening folding working platform, a local opening folding part and a covering inner folding part. The opening folding working platform supports a bag body sheet material, the local opening folding part and the covering and inward folding part are located on the two sides of the y axis of the bag body sheet material respectively, an opening folding piece can be folded inwards along a bag body folding line, an inserting opening is formed by an outer wrapping side piece and the opening folding piece, and the opening folding piece on one side of the covering and inward folding part is flattened. The local opening folding part is composed of combined sliding blocks, can be adjusted through inward folding sliding rails and can adapt to bag bodies of different specifications. And a gluing device and a sheet fixing device are arranged above the working platform. The device avoids manual operation, improves the production efficiency, and ensures the consistency of the folding quality.

Description

Technical Field

[0001] The utility model relates to the field of paper bag making machines, in particular to a local folding device for a middle-sealed bag body. Background Art

[0002] In the prior art, the formation of the center-sealed bag body insert usually requires manual operation, which is not only inefficient but also has high labor costs. In addition, there is also a method of gluing the side edges before wrapping the bag, such as invention patent CN119116452B, which discloses a paper bag wrapping machine and its bag wrapping process. The process is to first mark the bag mouth with a triangular auxiliary inner fold line and a bag mouth inner fold line, and after completing the center seal on both sides, the paper bag is placed in the wrapping machine; the front and back of the bag mouth are turned outward, and long strips of glue are sprayed on the front and back of the bag mouth after being turned outward. The bag opening device at the bag mouth inner folding device opens the bag mouth, and then turns the two sides of the bag mouth outward. Then, the pressure plate turns the front and back of the bag mouth inward. Then, the auxiliary plate turns the two sides of the bag mouth inward to the top of the front and back of the bag mouth. Then, the insert plate turns the front and back and both sides of the bag mouth downward, and finally the bag opening device closes. However, this method is relatively complicated to operate and requires the installation of an additional folding machine with complex movements. It takes up a lot of space, has high equipment costs, and low work efficiency. Alternatively, if the top is folded first and then the sides are overlapped and glued, the top portion requires a splicing operation, which is relatively complicated. The existing folding device will completely close the bag flap with the main bag sheet, which is not conducive to the subsequent splicing and overlapping work using a machine. It is also difficult to adapt to bags of different sizes and ensure the quality and consistency of the fold. Therefore, there is a need for a device that can automatically and efficiently complete the partial folding of the middle-sealed bag body and form the splice, facilitating the subsequent splicing process. Utility Model Content

[0003] The utility model aims to solve the shortcomings of the prior art and provides a local folding device for a middle-sealed bag body.

[0004] To solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] The local folding device of the middle sealed bag body comprises a folding working platform, a local folding component and a covering inner folding component.

[0006] The folding working platform is used to support the bag sheet; the local folding component is arranged on one side of the folding working platform, and the local folding component can fold the folding piece of the bag sheet inward along the bag fold line through linear or arc movement. The edges on both sides of the local folding component in the x-axis direction are respectively located on the inner sides of the two side edges of the bag sheet. The total length of the local folding component is narrower than the length of the folding piece and both sides of the folding piece are exposed from the local folding component, so that the outer side piece of the bag sheet pre-glued along the x-axis direction and the folding piece folded inward at its top form a non-contact insertion on both sides of the x-axis direction.

[0007] The local folding part and the covering inner folding part are respectively located on both sides of the bag body sheet in the y-axis direction, and the covering inner folding part is set on the other side of the folding working platform. The folding piece of the bag body sheet can be folded inward along the bag body fold line through linear or arc motion, and the covering inner folding part folds the folding piece of the bag body sheet on the side of the inner inserting side piece inward. Through the coordinated work of the local folding part and the covering inner folding part, the folding operation of the bag body sheet can be automatically completed, and the folding piece of the local folding part is respectively formed between the outer side pieces on both sides. The folding piece on one side of the covering inner folding part is completely flattened to facilitate subsequent insertion into the insert. This structure avoids manual operation, improves production efficiency, and ensures the consistency of the folding quality. Among them, the linear or arc motion of the local folding part and the covering inner folding part, the linear motion includes a folding motion composed of a straight line or multiple straight lines, and the arc motion refers to the way the local folding part and the covering inner folding part flip the folding piece inward like a hinge, all for the purpose of completing the folding action of the folding piece.

[0008] Preferably, the two side edges of the covering inner folding member in the x-axis direction are flush with the two side edges of the bag body sheet or exceed the edges of the bag body sheet, so as to better fold the inner side sheet and make the fold more flat and firm.

[0009] Preferably, the local folding part and the covering inner folding part are respectively arranged on the mounting seat, and the mounting seat is transmission-connected to the inner folding power source.

[0010] Preferably, the mounting seat of the partial folding part is an inward folding slide rail extending along the x-axis direction, and the partial folding part is slidably adjustable on the inward folding slide rail. The partial folding part extends out from the inner side of the inward folding slide rail, and the inward folding slide rail is transmission-connected with an inward folding power source, which is convenient for adjustment according to bag sheets of different sizes, thereby enhancing the versatility of the device.

[0011] Preferably, the inward folding power source includes an inward folding lifting drive device and an inward folding horizontal drive device. The inward folding lifting drive device is arranged on the inward folding power source mounting frame, and the inward folding horizontal drive device is transmission-connected to the inward folding power source mounting frame.

[0012] Preferably, the partial folding member is composed of at least two combined sliders, each of which can move independently on the inner folding slide rail. The sliders can move independently, which can more flexibly adapt to bag sheets of different shapes and sizes and improve the accuracy of the folding.

[0013] Preferably, the sliders have different widths along the x-axis. The wider slider corresponds to the front or back of the bag sheet, while the narrower slider corresponds to the position of the outer side sheet. The narrower slider is located inward of the x-axis edge of the outer side sheet. The narrower slider can adjust the required distance between the two sides and the bag edge according to the size of the bag and the size of the socket. The sliders can be adjusted by sliding along the x-axis at any time, and can be removed, added, or replaced. Various designs are all convenient for adjustment.

[0014] Preferably, a gluing device that can reciprocate along the y-axis is provided above the working platform, which can evenly apply glue to the bag sheet to ensure subsequent bonding.

[0015] Preferably, a sheet material fixing device is further provided above the working platform, and the sheet material fixing device fixes the bag sheet material above the folding working platform by pressing down or by adsorption.

[0016] Preferably, a sheet material fixing device is provided above the working platform. The sheet material fixing device fixes the bag sheet material on the folding working platform by pressing downward. The sheet material fixing device is connected to the inner folding power source mounting frame and moves inward and outward along the y-axis synchronously with the inner folding power source mounting frame. This prevents the bag sheet material from moving during the folding process, thereby ensuring the accuracy and stability of the folding.

[0017] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0018] Through the coordinated work of the local folding component and the covering inner folding component, the folding operation of the bag sheet can be automatically completed, and the folding pieces of the local folding component are respectively formed between the two sides of the folding piece and the outer side pieces on both sides. The folding piece on one side of the covering inner folding component is completely flattened to facilitate subsequent insertion into the insertion. This structure avoids manual operation, improves production efficiency, and ensures the consistency of folding quality.

[0019] The overall width of the local folding part can be moved by sliding, and can also be adjusted by adding, replacing or reducing sliders, so as to adapt to bag folds of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the local folding part of the utility model;

[0021] Figure 2 yes Figure 1 A partial enlarged view of middle D;

[0022] Figure 3 This is a structural diagram of the local folding component from another angle;

[0023] Figure 4 This is a schematic structural diagram of the utility model covering the inner folding component;

[0024] Figure 5 A schematic structural diagram of the local folding part, the covering inner folding part and the bag body sheet material of the utility model.

[0025] The names of the parts indicated by the numerical labels in the above drawings are as follows: 51, folding working platform; 52, local folding component; 521, inward folding slide rail; 53, covering inward folding component; 54, inward folding lifting drive device; 55, inward folding horizontal drive device; 56, slider; 57, inward folding power source mounting frame; 58, sheet fixing device; 59, gluing device; 90, bag body sheet; 91, outer side panel; 92, inner side panel; 921, overlap; 95, socket; 96, folding sheet. DETAILED DESCRIPTION

[0026] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] Partial folding device for the middle sealed bag body, such as Figure 1-4 As shown, it includes a folding working platform 51, a local folding component 52, and a covering inner folding component 53.

[0029] The folding working platform 51 is used to support the bag body sheet 90; Figure 1-2 As shown, the local folding component 52 is arranged on one side of the folding working platform 51. The local folding component 52 can fold the folding piece 96 of the bag sheet 90 inward along the bag fold line through a straight line or arc movement. The edges on both sides of the local folding component 52 in the x-axis direction are respectively located on the inner side of the two side edges of the bag sheet 90. The total length of the local folding component 52 is narrower than the length of the folding piece 96 and both sides of the folding piece 96 are exposed from the local folding component 52, so that the outer side piece 91 of the bag sheet 90 pre-glued along the x-axis direction and the folding piece 96 folded inward at its top form a non-contact socket 95 on both sides of the x-axis direction.

[0030] like Figure 4-5 As shown, the local folding part 52 and the covering inner folding part 53 are respectively located on both sides of the bag body sheet 90 in the y-axis direction, and the covering inner folding part 53 is set on the other side of the folding working platform. The folding piece 96 of the bag body sheet 90 can be folded inward along the bag body fold line through a straight line or arc movement, and the covering inner folding part 53 folds the folding piece 96 of the bag body sheet 90 on the side of the inner inserting side piece 92 inward. Among them, the inner inserting side piece 92 has a lap edge 921. After the folding work of this embodiment is completed, after the bag body is folded into a U shape, the inner inserting side pieces 92 and the outer side pieces 91 on both sides are folded inward, and then the lap edge 921 of the inner inserting side piece 92 is inserted into the insertion 95 formed by the outer side piece 91 and glued together to form a middle-sealed bag body.

[0031] The side edges of the covering inner folding member 53 in the x-axis direction are flush with the side edges of the bag sheet 90 or extend beyond the edges of the bag sheet 90 .

[0032] The partial folding portion 52 and the covering inner folding portion 53 are respectively arranged on a mounting seat, and the mounting seat is transmission-connected to an inner folding power source.

[0033] The mounting seat of the partial folding part 52 is an inward folding slide rail 521 extending along the x-axis direction. The partial folding part 52 is slidably adjustable on the inward folding slide rail 521. The partial folding part 52 extends out from the inner side of the inward folding slide rail 521. The inward folding slide rail 521 is transmission-connected to an inward folding power source.

[0034] like Figure 3 As shown, the inner folding power source can be a rotating power source that drives the folding sheet to swing, such as a transmission structure commonly used in the art of motor and electric cylinder linkage, or it can be at least two driving devices that drive the inner folding action. As one of the practicable ways, the inner folding power source includes an inner folding lifting drive device 54 and an inner folding horizontal drive device 55. The inner folding lifting drive device 54 is arranged on the inner folding power source mounting frame 57, and the inner folding horizontal drive device 55 is transmission-connected to the inner folding power source mounting frame 57. After the inner folding lifting drive device 54 lifts the folding piece part, the inner folding horizontal drive device 55 drives the inner folding horizontal drive device 55 to fold inward, and then the inner folding lifting drive device 54 drives the folding piece downward. The inner folding lifting drive device 54 and the inner folding horizontal drive device 55 are commonly used driving devices in the art such as motors and cylinders.

[0035] The partial folding part 52 is composed of at least two combined sliding blocks 56 . The lengths of the sliding blocks 56 in the y-axis direction are equal or unequal, and each sliding block 56 can move on the inner folding slide rail 521 respectively.

[0036] The width of the slider 56 in the x-axis direction is different. The wider slider 56 corresponds to the front or back of the pressed bag sheet 90, and the narrower slider 56 corresponds to the position of pressing the outer side sheet 91. The narrower slider 56 is located on the inner side of the edge of the outer side sheet 91 in the x-axis direction.

[0037] A glue applying device 59 is provided above the working platform 51 and can move back and forth along the y-axis direction.

[0038] A sheet material fixing device 58 is further provided above the working platform 51 , and the sheet material fixing device 58 fixes the bag sheet material 90 above the folding working platform 51 by pressing down or by adsorption.

[0039] A sheet material fixing device 58 is also provided above the working platform 51. The sheet material fixing device 58 fixes the bag sheet 90 on the folding working platform 51 by pressing down. The sheet material fixing device 58 is connected to the inner folding power source mounting frame 57 and moves inward and outward along the y-axis direction synchronously with the inner folding power source mounting frame 57.

[0040] The bag body sheet 90 is placed on the folding work platform 51 , and the sheet fixing device 58 fixes the bag body sheet 90 above the folding work platform 51 by pressing down or adsorbing.

[0041] Gluing operation: The gluing device 59 moves back and forth along the y-axis to apply glue to the parts of the bag body sheet 90 that need to be glued. Gluing in the x-axis direction is completed before the folding. Both sides of the sheet in the y-axis direction need to be glued in the x-axis direction before the folding can be performed. The y-axis gluing can be applied at a selectable location. One method is to glue the edge in the y-axis direction on the side where the socket is formed before the folding. Alternatively, the flattened side of the sheet can be glued on both sides in the y-axis direction before or after the folding, so that the overlapping edges can be fixed to the inner wall of the socket after insertion.

[0042] The local folding member 52 is driven by a power source connected to the inward folding, and the covering inward folding member 53 is driven by a power source connected to the inward folding. The local folding member 52 folds the folding piece 96 of the bag body sheet 90 inward along the bag body fold line through linear or arc motion, so that the outer side sheet 91 and the top inward folding piece 96 form a non-contact insertion opening 95 on both sides of the x-axis direction. The covering inward folding member 53 folds the folding piece 96 of the bag body sheet 90 on this side inward.

[0043] After each change of the bag body specifications, the position of the local folding component 52 can be adjusted through the inner folding slide rail 521 according to the size of the bag body sheet 90, and a more precise folding operation can be achieved by moving the combination slider 56 or adjusting the number and size of the combination slider 56.

[0044] After the above operations, the bag body sheet 90 is folded and the insertion opening 95 is formed, the sheet fixing device 58 is released, and the folded bag body is taken out.

[0045] Among them, the linear or arc motion of the local folding part 52 and the covering inner folding part 53, the linear motion includes a folding line motion composed of a straight line segment or multiple straight lines, and the arc motion refers to the way the local folding part 52 and the covering inner folding part 53 flip the folding piece inward like a hinge, the purpose of which is to complete the folding action of the folding piece.

[0046] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or location relationships based on the positions or location relationships shown in the accompanying drawings. The x-axis direction is the extension direction of the fold line of the flap of the bag body sheet, and the y-axis direction is the direction of the line connecting the bag openings on both sides of the bag body sheet. The y-axis direction is perpendicular to the x-axis direction, and both the x-axis and y-axis directions are located in the horizontal plane. It should be noted that Figure 1、 4 In order to make the structure of this side clearer, only the processing parts on one side are drawn, and the parts on the other side are not drawn, but this does not mean that there are no processing parts on the other side. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0047] In short, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention patent.

Claims

1. Partial folding device for middle-sealed bag body, including - a folding working platform (51) for supporting the bag body sheet (90); - a local folding part (52), which is arranged on one side of the folding working platform (51), and the local folding part (52) can fold the folding piece (96) of the bag body sheet (90) inward along the bag body fold line through a linear or arc motion, the total length of the local folding part (52) is narrower than the length of the folding piece (96) and both sides of the folding piece (96) are exposed from the local folding part (52), so that the outer side piece (91) of the bag body sheet (90) pre-glued along the x-axis direction and the folding piece (96) folded inward at the top thereof form a non-contact insertion opening (95) on both sides of the x-axis direction; - A covering inner folding component (53) is arranged on the other side of the folding working platform (51), and can fold the folding piece (96) of the bag body sheet (90) inward along the bag body fold line through a linear or arc motion, and the covering inner folding component (53) folds the folding piece (96) of the bag body sheet (90) on the side of the inner inserting side piece (92) inward, and the local folding component (52) and the covering inner folding component (53) are respectively located on both sides of the bag body sheet (90) in the y-axis direction.

2. The device for partially folding the middle sealed bag according to claim 1, characterized in that: The two side edges of the covering inner folding component (53) in the x-axis direction are flush with the two side edges of the bag body sheet (90) or exceed the edges of the bag body sheet (90).

3. The device for partially folding the middle sealed bag according to claim 1, characterized in that: The local folding part (52) and the covering inner folding part (53) are respectively arranged on the mounting seat, and the mounting seat is transmission-connected to the inner folding power source.

4. The device for partially folding the middle sealed bag according to claim 3, characterized in that: The mounting seat of the partial folding member (52) is an inward folding slide rail (521) extending along the x-axis direction. The partial folding member (52) is slidably adjustable on the inward folding slide rail (521). The partial folding member (52) extends out from the inner side of the inward folding slide rail (521). The inward folding slide rail (521) is transmission-connected to an inward folding power source.

5. The device for partially folding the middle sealed bag according to claim 3, characterized in that: The inward folding power source comprises an inward folding lifting drive device (54) and an inward folding horizontal drive device (55). The inward folding lifting drive device (54) is arranged on an inward folding power source mounting frame (57), and the inward folding horizontal drive device (55) is transmission-connected to the inward folding power source mounting frame (57).

6. The device for partially folding the middle sealed bag according to claim 4, characterized in that: The local folding part (52) is composed of at least two combined sliding blocks (56), and each sliding block (56) can move on the inner folding slide rail (521).

7. The device for partially folding the middle sealed bag according to claim 6, characterized in that: The slider (56) has different widths in the x-axis direction. The wider slider (56) corresponds to the front or back of the pressed bag body sheet (90), and the narrower slider (56) corresponds to the position of pressing the outer side sheet (91). The narrower slider (56) is located on the inner side of the edge of the outer side sheet (91) in the x-axis direction.

8. The device for partially folding the middle sealed bag according to claim 1, characterized in that: A glue-spraying device (59) that can reciprocate along the y-axis direction is also provided above the working platform (51).

9. The device for partially folding the middle sealed bag according to claim 1, characterized in that: A sheet material fixing device (58) is also provided above the working platform (51), and the sheet material fixing device (58) fixes the bag sheet material (90) above the folding working platform (51) by pressing down or by adsorption.

10. The partial folding device for a middle sealed bag according to claim 1, characterized in that: A sheet material fixing device (58) is also provided above the working platform (51). The sheet material fixing device (58) fixes the bag body sheet material (90) on the folding working platform (51) by pressing downward. The sheet material fixing device (58) is connected to the inner folding power source mounting frame (57) and moves inward and outward along the y-axis direction synchronously with the inner folding power source mounting frame (57).

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