A folding device for a bag opening apparatus and a bag opening apparatus

Abstract

The application relates to a folding device suitable for a bag opening device and the bag opening device, the folding device comprising a bearing frame, a power component and a folding module, the folding module comprising at least two intermediate components, elastic components and two end components, the two end components being oppositely arranged, at least one end component being movably connected to the bearing frame, each intermediate component being movably arranged between the two end components, the two sides of the intermediate component being respectively provided with the elastic components, the end of the end component away from the intermediate component being provided with a first hook-shaped folding structure and / or the side of the intermediate component being provided with a second hook-shaped folding structure, the power component being in transmission connection with the movable end component through a linear driving module, the power component being used for adjusting the interval between the two end components and driving each intermediate component to synchronously act with the end component through the elastic component; the folding device can meet the bag opening demand of various sizes of bag mouths and can effectively improve the universality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bag opening equipment, in particular to a folding device suitable for bag opening equipment and bag opening equipment. BACKGROUND

[0002] The bag opening equipment (or bag opening machine, bag opening sewing machine, etc.) is a sewing machine specially used for sewing bags, mainly used for sewing pockets, zippers and other parts of clothing, bags and other industries, and widely used in the sewing industry.

[0003] The existing bag opening equipment usually includes a cutting device, a sewing device, a folding device and a pressure frame device matched with the folding device, wherein the cutting device is mainly used for cutting fabric, the sewing device is mainly used for sewing fabric, the pressure frame device is mainly used for tensioning and transferring fabric, and the folding device is mainly used for forming a bag opening with a required shape on the fabric, which is usually a long strip structure, such as Figure 3 Especially rectangular structure. In the prior art, the process of opening a bag on the fabric by using the existing bag opening equipment usually includes the following steps: (1) determining a bag opening area on the fabric where a bag opening needs to be sewn, as shown in Figure 1 ; (2) cutting a seam suitable for the required bag opening in the bag opening area by using the cutting device, so as to form a folding piece through the seam, as shown in the figure; (3) inserting the folding device suitable for the required bag opening into the bag opening area, so that each folding piece is respectively folded along the edge of the bag opening to the inside of the bag opening, forming a required bag opening shape, as shown in Figure 3 , completing the forming process of the bag opening; and then performing corresponding processes such as placing a zipper or a bag lip or sewing according to actual requirements.

[0004] The folding device in the existing bag opening equipment usually has a fixed length and width, and can only be used to make a bag opening with a corresponding size. When the size of the bag opening changes, the folding device needs to be replaced to adapt to it. On the one hand, the existing bag opening equipment has poor universality and can only meet the opening bag requirements of a specific size. On the other hand, the cost of the bag opening equipment is high, and multiple folding devices of different sizes need to be configured for the bag opening equipment to meet the opening bag requirements of different sizes. Moreover, the process of manually disassembling and replacing the folding device still exists. How to make the folding device meet the opening bag requirements of different sizes needs to be solved urgently. SUMMARY

[0005] The first aspect of the present application solves the problem that the existing folding device cannot meet the opening bag requirements of different sizes, and provides a folding device with adjustable length, which can not only meet the folding requirements of the two wide edges of the length bag opening, but also meet the folding requirements of the two long edges of the bag opening with different lengths. The main idea is:

[0006] A kind of folding device suitable for opening bag equipment, including for bearing carrier frame for bearing;Power component, for providing power, power component is mounted to carrier frame;Control module, and folding module for inserting fabric, the folding module includes at least two intermediate components, elastic component and two end components, wherein, two end components are oppositely arranged, at least one end component is movably connected to carrier frame, and the moving direction of end component is first direction;Each intermediate component is movably arranged between two end components respectively, and intermediate component can move along first direction, the elastic component is arranged between adjacent two intermediate components, and end component is drivingly connected with adjacent intermediate component;The end of the end component away from intermediate component is configured with first folding structure in the form of hook and / or the side of the intermediate component is configured with second folding structure in the form of hook;Control module is connected with power component, power component is drivingly connected with movable end component by linear drive module, and power component is used to adjust the interval between two end components, when two end components are close to each other, the elastic potential energy of elastic component increases, when end component is away from each other, the elastic potential energy of elastic component decreases, and each intermediate component and end component are driven by elastic component to synchronize action.In the scheme, by movably arranging each intermediate part between two end parts, the intermediate part has the freedom to move in the first direction; by movably arranging each intermediate part between two end parts, the elastic force of the elastic part in the first direction, the end part and the intermediate part are transmitted through the elastic part in the first direction, and the two intermediate parts are also transmitted through the elastic part in the first direction; at the same time, by configuring two end parts, movably arranging each intermediate part between two end parts, and movably connecting at least one end part to the carrier, the end part is used to limit the length of the folding edge module, so that through the cooperation of the end part, the intermediate part and the elastic part, a folding edge module can be formed which can stretch in the first direction. When the two end parts are close to each other, the elastic part is squeezed, and the elastic part synchronously transmits the force between the end part and the intermediate part and between the intermediate parts, the distance between the end part and the intermediate part and the distance between the intermediate parts can be synchronously reduced to reduce the length of the folding edge module to adapt to the size of the bag opening, and the elastic potential energy of each elastic part gradually increases in this process; when the end parts are away from each other, the distance between the end part and the intermediate part and the distance between the intermediate parts are synchronously increased to increase the length of the folding edge module to adapt to the size of the bag opening, and the elastic potential energy of the elastic part gradually decreases in this process; by configuring a power part and driving the movable end part in the first direction, the distance between the two end parts can be effectively changed to effectively adjust and control the length of the folding edge module, thereby effectively solving the problem of folding the edges of the bag opening at both ends of the bag opening of different sizes, and in this process, the distance between the end part and the intermediate part and the distance between the intermediate parts can be changed synchronously through the elastic part to ensure that each intermediate part can be evenly distributed between the two end parts, which can better meet the folding edge requirement of the two sides along the length direction of the bag opening of different sizes, thereby solving the problem of better folding effect of the two sides along the length direction of the bag opening of different sizes. By constructing a hook-shaped first folding edge structure on the end part away from the intermediate part, the movement of the end part can drive the hook-shaped first folding edge structure to move synchronously in the first direction during the folding process, which can adapt to different lengths of the bag opening, and the first folding edge structure can drive the folding edge of the bag opening at both ends to bend along the first direction to form a folding edge. Since the distance between the two end parts is adjustable, the first folding edge structure on the end part can assist the folding edge of the bag opening at both ends to bend and form a folding edge during the opening process, thereby realizing the folding function and solving the problem of folding the edges of the bag opening at both ends along the length direction.The second folding edge structure is configured in the form of a hook on the side of the intermediate component, so that the change of the spacing between the intermediate components does not affect and interfere with the second folding edge structure, and since the spacing between the intermediate components can be uniformly changed synchronously, the second folding edge structures can be matched with each other under different spacings, and can be adapted to the long edges of the bag opening of different lengths, so as to collectively assist the long edges in the bag opening of different sizes to realize the folding edge function, and the problem of folding the long edges in the bag opening of different sizes can be solved.

[0007] To solve the problem of improving the moving precision of the end component along the first direction, further, a guide mechanism is further included, the guide mechanism includes a guide part and a movable part matched with the guide part, the guide part is arranged along the first direction, the movable part is movably constrained to the guide part, the guide part is connected to the bearing frame, and the movable part is connected to the movable end component.

[0008] To solve the problem of adjusting the position of the end component along the first direction by the power component, in some preferred schemes, a linear drive module arranged along the first direction is further included, the power component is drivingly connected to the linear drive module, and the linear drive module is drivingly connected to the end component.

[0009] Further, a guide mechanism is further included, the guide mechanism includes a guide part and a plurality of movable parts matched with the guide part, the guide part is arranged along the first direction, each movable part forms a moving pair with the guide part, and each intermediate component is connected to the guide part through the cooperation of each movable part and the guide part.

[0010] To solve the problem of improving the moving precision of the intermediate component, further, the guide part adopts a guide shaft, the guide shaft is arranged along the first direction, and the movable part is a guide hole matched with the guide shaft, the guide hole is configured in the intermediate component, and the intermediate component is sleeved on the guide shaft through the guide hole.

[0011] In order to further improve the moving precision of the intermediate part, further, the guide shaft is installed on one of the end parts, and the other end part is configured with a guide hole matched with the guide shaft, and the guide shaft passes through the guide hole. In this scheme, by directly installing the guide shaft on the end part, the end part is used as the positioning reference of the guide shaft, the end part and the guide shaft are synchronized, and the intermediate part moves along the guide shaft, so that the error caused by the difference of the positioning reference can be eliminated, and the moving precision of the intermediate part can be further improved.

[0012] In order to further improve the moving precision of the intermediate part, further, at least one guide shaft is installed on each end part, and each guide shaft is parallel to each other. In order to guide the movement of the intermediate part and the end part by using at least two guide shafts, the movement precision can be further improved.

[0013] In order to solve the problem of improving the stability of the elastic part, further, the elastic part is sleeved on the guide shaft. In order to support the elastic part by using the guide shaft, and ensure that the elastic force direction of the elastic part is consistent with the first direction, the stability of the elastic part can be effectively improved.

[0014] Preferably, the elastic part adopts a conical spring. The conical spring can be compressed to be flat, so that when compressed to the limit position, the spacing between the two adjacent intermediate parts is greatly reduced, the structure of the whole flanging module is more compact, and the volume is smaller. The demand for larger size bag opening can be met while meeting the demand for smaller size bag opening.

[0015] In order to solve the problem of adapting to different size bag openings, further, one side or both sides of the intermediate part is configured with a groove matched with the elastic part, and the groove is communicated with the guide hole, and / or one side of the end part is configured with a groove matched with the elastic part, and the groove is communicated with the guide hole; the groove is used to accommodate at least part of the elastic part. When the length of the flanging module is reduced, the elastic part can be accommodated in the corresponding groove, so that the two adjacent intermediate parts can contact each other, and the adjacent intermediate part and the end part can contact each other, so that the minimum length of the flanging module can be shorter, so as to meet the demand of smaller size bag opening.

[0016] In order to solve the problem of better adapting to different length bag openings and flanging the long side in different size bag openings, further, the side surface of the end part is respectively configured with a third flanging structure in the shape of a hook, the third flanging structure is matched with the second flanging structure, and the third flanging structure is used to assist flanging. The third flanging structure on the side surface of the end part can cooperate with the second flanging structure on the side surface of the intermediate part, so as to form a flanging structure with longer size and more continuous structure on the side surface of the whole flanging module. Not only can the flanging demand of the long side in different size bag openings be met, but also better flanging function and better flanging effect can be realized.

[0017] The fourth aspect of the present application aims to solve the problem of folding the two ends of the bag opening along the length direction, and further, the first folding structure comprises a positioning surface and a hook portion protruding from the positioning surface, the hook portion is configured with a limiting surface for limiting the folding piece, and the positioning surface and the limiting surface form a hook shape. In order to cooperate with the corresponding folding process to fold the two ends of the bag opening along the length direction.

[0018] Further, the outer side surface of the hook portion in the first folding structure is also configured with a guide surface, the guide surface extends to the lower end of the end part, and the thickness of the end part along the first direction gradually decreases from the upper edge of the guide surface to the lower end of the end part. It can reduce the resistance when inserting the fabric, prevent the insertion action from moving the fabric and causing errors, and facilitate faster and more accurate implementation of the bag opening function.

[0019] Preferably, the second folding structure is adapted to the first folding structure. The mutual adaptation of the first folding structure, the second folding structure and the third folding structure can effectively prevent the folding actions in two directions from interfering with each other, make the folding actions in two directions more coordinated, and facilitate the folding actions in two directions at the same height, thereby facilitating the simplification of the bag opening process.

[0020] The fifth aspect of the present application aims to solve the problem of meeting the folding requirements of the middle long edges of bag openings of different sizes, and further, the second folding structure comprises a positioning surface and a hook portion protruding from the positioning surface, the hook portion is configured with a limiting surface for limiting the folding piece, and the positioning surface and the limiting surface form a hook shape; the third folding structure comprises a positioning surface and a hook portion protruding from the positioning surface, the hook portion is configured with a limiting surface for limiting the folding piece, and the positioning surface and the limiting surface form a hook shape; the positioning surface of the third folding structure is adapted to the positioning surface of the second folding structure, and the limiting surface of the third folding structure is adapted to the limiting surface of the second folding structure. In order to cooperate with the corresponding folding process to fold the two long edges of the bag opening, and can meet the folding requirements of the middle long edges of bag openings of different lengths.

[0021] Further, the outer side surface of the hook portion in the second folding structure is also configured with a guide surface, the guide surface extends to the lower end of the intermediate part, and the width of the intermediate part gradually decreases from the upper edge of the guide surface to the lower end of the intermediate part; the outer side surface of the hook portion in the third folding structure is also configured with a guide surface, the guide surface extends to the lower end of the end part, and the width of the end part gradually decreases from the upper edge of the guide surface to the lower end of the end part. Through the cooperation of the guide surfaces, the lower end of the folding module is sharper, and it is more convenient to insert and withdraw the fabric.

[0022] The sixth aspect of the present application aims to simplify the folding process and improve the folding accuracy. Further, the two end parts are movably connected to the bearing frame, and the two end parts are symmetrically arranged. The power part drives the two end parts to move synchronously and reversely. With this design, the folding module can be driven to stretch and retract around the middle position of the two end parts, so as to adjust the length of the folding module around the middle position of the two end parts. In actual use, the action can be simplified and the positioning frequency can be reduced, thereby effectively simplifying the folding process and improving the folding efficiency, and the folding accuracy can be improved.

[0023] Preferably, the linear drive module comprises a rotating shaft and a nut. The rotating shaft comprises a middle shaft section and a screw rod section connected to both ends of the middle shaft section. The threads of the two screw rod sections are opposite in direction. The screw rod sections are respectively threadedly connected with the nuts, and the nuts are connected to the end parts. The power part is in transmission connection with the middle shaft section. The power part drives the rotating shaft to rotate, so that the two nuts move synchronously and reversely, and then the two end parts move synchronously and reversely, thereby adjusting the length of the folding module around the middle position of the two end parts.

[0024] To facilitate the insertion and removal of the fabric, further comprising a lifting power. The bearing frame comprises a fixed frame and a movable frame. The movable frame is vertically movable and constrained to the fixed frame. The lifting power is installed on the fixed frame and in transmission connection with the movable frame, for driving the movable frame to vertically lift. The folding module is installed on the movable frame. The lifting power drives the entire folding module to vertically lift, so that the folding module moves relative to the fabric, thereby achieving the purpose of inserting and removing the fabric.

[0025] A bag opening device comprises a rack and the folding device, and the folding device is installed on the rack.

[0026] Further, a folding pressing frame device is provided to adapt to the folding device. The folding pressing frame device is connected to the rack and located below the folding device. The folding pressing frame device is provided with a lower pressing part, an upper pressing part, a pulling part, a pulling power and an upper pressing power on both sides. The pulling power is in transmission connection with the pulling part, for driving the pulling part to horizontally stretch and retract. The upper pressing power is in transmission connection with the upper pressing part, for driving the upper pressing part to clamp the folded edge piece. The folding device and the folding pressing frame device cooperate to meet the folding requirements of bag openings of different lengths.

[0027] Compared with the prior art, the folding device and the bag opening device provided by the present application can meet the bag opening requirements of bag openings of various sizes, effectively improve the universality, and make the bag opening process simpler and more efficient without manual disassembly and replacement of the folding device during use. BRIEF DESCRIPTION OF DRAWINGS

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a partial top view of the fabric.

[0030] Figure 2 The fabric after laser cutting.

[0031] Figure 3 The fabric after the hem is folded inward to form the bag opening.

[0032] Figure 4 This is a front view of a folding device provided in an embodiment of the present invention, where the direction of the dashed line is the first direction.

[0033] Figure 5 for Figure 4 The right view.

[0034] Figure 6 This is a partial structural diagram of an end component in a folding device provided in an embodiment of the present invention.

[0035] Figure 7 for Figure 6 The main view.

[0036] Figure 8 for Figure 6 The right view.

[0037] Figure 9 This is a partial structural diagram of an intermediate component in a folding device provided in an embodiment of the present invention.

[0038] Figure 10 for Figure 9 The right view.

[0039] Figure 11 This is a three-dimensional structural schematic diagram of another folding device provided in an embodiment of the present invention.

[0040] Figure 12 for Figure 11 The right view.

[0041] Figure 13 for Figure 11 In the main view, the length of the folded edge module is the smallest.

[0042] Figure 14 for Figure 11The length of the folding module is the largest in the front view.

[0043] Figure 15 The partial structure diagram of another folding device provided in the embodiment of the present application.

[0044] Figure 16 The structure diagram of another intermediate component in a folding device provided in the embodiment of the present application.

[0045] Figure 17 The partial structure diagram of a bag opening device provided in the embodiment 5 of the present application.

[0046] Figure 18 The diagram of the folding device after being aligned with the bag opening area in the bag opening process.

[0047] Figure 19 The diagram of the folding device after the lower end being inserted into the bag opening area in the bag opening process.

[0048] Figure 20 The diagram of the folding device after the length being adjusted and adapted to the bag opening length in the bag opening process.

[0049] Figure 21 The diagram of the folding device after the pulling component being extended and the folding piece being abutted to the positioning surface in the bag opening process.

[0050] Figure 22 The diagram of the folding device after being moved upward and the folding piece being pressed in the bag opening process.

[0051] Figure 23 The diagram of the folding device after the upper pressing component being clamped in the bag opening process.

[0052] Figure 24 The diagram of the folding device after the pulling component being reversely moved and withdrawn in the bag opening process.

[0053] Figure 25 The diagram of the folding device after the length being adjusted to be smaller than the bag opening length after the folding being completed in the bag opening process.

[0054] Explanation of signs in the figures: fabric 1, bag opening 11, bag opening area 12, seam 13, hem piece 14; hemming device 2, bearing frame 21, fixed frame 211, movable frame 212, power component 22, hemming module 23, lifting power 24, linear drive module 25, elastic component 26; end component 3, first hemming structure 31, third hemming structure 32, positioning surface 33, hook portion 34, limiting surface 35, guide surface 36, sinking groove 37, guide shaft 38; intermediate component 4, second hemming structure 41, guide hole 42, groove 43; guide rail 51, sliding block 52; rotating shaft 61, intermediate shaft segment 62, screw segment 63, nut 64, screw 65, driving pulley 66, driven pulley 67, synchronous belt 68; machine frame 7; hemming and pressing frame device 8, hemming and forming module 81, downward pressing component 82, upward pressing component 83, pulling component 84. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0056] Embodiment 1

[0057] A hemming device suitable for a bag opening device is provided in the embodiment, which comprises a bearing frame 21, a power component 22, a hemming module 23 and a control module. The bearing frame 21 is mainly used for bearing, and other devices in the hemming device 2 can be directly or indirectly installed on the bearing frame. The structure of the bearing frame 21 can be determined according to actual needs, as long as it can stably bear.

[0058] The hemming module 23 is mainly used for inserting the fabric 1 and cooperating with other mechanisms to realize the hemming function. In the embodiment, the hemming module 23 comprises a plurality of intermediate components 4, an elastic component 26 and two end components 3, as shown in Figure 4 and Figure 5 The two end components 3 are arranged oppositely, and at least one end component 3 is movably connected to the bearing frame 21, so that it can move relative to the bearing frame 21. For the convenience of description, the moving direction of the end component 3 is taken as the first direction in the embodiment, as shown in Figure 4 , and the first direction is preferably horizontal.

[0059] In the embodiment, the power component 22 is installed on the bearing frame 21, as shown in Figure 4 and Figure 11 The power component 22 is mainly used to provide power for the folding module 23. In the implementation, the power component 22 can be a motor (or a motor), for example, a stepper motor or a servo motor can be preferred. The power component 22 is in transmission connection with the movable end component 3, so as to drive the end component 3 to move in the first direction by the power component 22, so as to accurately adjust the position of the end component 3 in the first direction by the power component 22, so that the two end components 3 can be driven by the power component 22 to approach each other, so that the length of the folding module 23 in the first direction is reduced, so as to adapt to the smaller size of the bag opening 11; also so that the two end components 3 can be driven by the power component 22 to move away from each other, so that the length of the folding module 23 in the first direction is increased, so as to adapt to the longer size of the bag opening 11.

[0060] In the embodiment, the control module is electrically connected with the power component 22, so as to control the folding module 23 to realize the telescopic function by the control module. In the implementation, the control module can be realized by the existing technology, and the control module includes but is not limited to the existing controller, processor, PLC, motor driver, etc. So that in actual use, the length of the folding module 23 in the device can be automatically adjusted according to the size of the bag opening 11 by the control module.

[0061] As shown in Figure 4 and Figure 11 Each intermediate component 4 is movably arranged between the two end components 3, and the intermediate component 4 is movable relative to the bearing frame 21. The moving direction of the intermediate component 4 is consistent with the moving direction of the end component 3, that is, the intermediate component 4 can also move in the first direction. At the same time, as shown in Figure 4 The two sides of the intermediate component 4 are respectively provided with the elastic component 26, so that the intermediate component 4 and the intermediate component 4 are separated from each other through the elastic component 26 therebetween, and the intermediate component 4 and the end component 3 are also separated from each other through the elastic component 26 therebetween. In the embodiment, the elastic component 26 preferably adopts a compression spring, and the elastic component 26 can be configured to always have a spring force in actual use, so that the intermediate component 4 and the intermediate component 4 always have an interaction force therebetween, and the intermediate component 4 and the end component 3 always have an interaction force therebetween. The interaction force is the spring force of the elastic component 26, so that when the two end components 3 approach each other, the elastic component 26 is pressed, and the elastic component 26 synchronously transmits the interaction force between the end component 3 and the intermediate component 4 and between the intermediate component 4 and the intermediate component 4, so that the distance between the end component 3 and the intermediate component 4 and the distance between the intermediate component 4 and the intermediate component 4 can be synchronously reduced, to reduce the length of the folding module 23, to adapt to the smaller size of the bag opening 11, and the elastic potential energy of each elastic component 26 gradually increases in the process; as shown in Figure 13and Figure 14 As shown in FIG. 6, when the end parts 3 move away from each other, the distance between the end parts 3 and the intermediate parts 4 and the distance between the intermediate parts 4 and the intermediate parts 4 increase synchronously, achieving the purpose of increasing the length of the hemming module 23 to adapt to the bag opening 11 of a larger size, and the elastic potential energy of the elastic parts 26 gradually decreases in the process. With such a design, whether the hemming module 23 is elongated or shortened, it can be ensured that the intermediate parts 4 are always evenly distributed between the two end parts 3, which can better meet the hemming needs of the two side edges along the length direction of the bag opening 11 of different sizes, and can achieve better hemming effect of the two side edges along the length direction of the bag opening 11 of different sizes.

[0062] In addition, since the hemming device 2 can automatically adjust the length of the hemming module 23 through the power part 22, and can ensure that the intermediate parts 4 can be evenly distributed between the two end parts 3 at any length, it can meet the hemming needs of the bag opening 11 of different sizes in actual use, without the need for manual disassembly and replacement of the hemming device 2, making the bag opening process simpler and more efficient.

[0063] In practice, the number of intermediate parts 4 can be determined according to actual needs, for example, the number of intermediate parts 4 can be one, two or more. In practice, the hemming device 2 can be preferentially configured with at least two intermediate parts 4, such as Figure 4 As shown in FIG. 6, it is more conducive to achieving better hemming effect of the two side edges along the length direction of the bag opening 11. At this time, when the two end parts 3 move closer to each other, the distance between the adjacent two intermediate parts 4 decreases synchronously, and when the end parts 3 move away from each other, the distance between the adjacent two intermediate parts 4 increases synchronously.

[0064] In practice, the end part 3 is drivingly connected with the adjacent intermediate part 4, which has various implementation manners, for example, the elastic part 26 can also be arranged between the end part 3 and the adjacent intermediate part 4, so that the end part 3 can be drivingly connected with the intermediate part 4 through the elastic part 26, such as Figure 14 As shown in FIG. 6. For another example, the end part 3 can also be directly fixedly connected with the adjacent intermediate part 4.

[0065] In a specific implementation, the elastic component 26 can be a helical compression spring (e.g. a cylindrical helical compression spring), a conical helical spring (or a truncated conical helical compression spring), a volute helical spring, etc. In an implementation, one, two or more elastic components 26 can be arranged between two adjacent intermediate components 4, and the two ends of the elastic component 26 can be connected to the corresponding intermediate components 4, or the elastic component 26 can not be connected to the corresponding intermediate components 4. Similarly, in an implementation, one, two or more elastic components 26 can be arranged between the end component 3 and the adjacent intermediate component 4, and the two ends of the elastic component 26 can be connected to the corresponding intermediate component 4 and the end component 3, or the elastic component 26 can not be connected to the corresponding intermediate component 4 or the corresponding end component 3.

[0066] To ensure that the end component 3 moves strictly in the first direction, in a more complete solution, the folding device 2 further comprises a guide mechanism, which comprises a guide part and a movable part adapted to the guide part, the guide part is connected to the bearing frame 21 and arranged in the first direction, as shown in Figure 4 and Figure 11 The movable part can be movably constrained to the guide part, and the movable end component 3 is connected to the movable part, not only allowing the end component 3 to have the freedom to move in the first direction, but also guiding the movement of the end component 3 through the cooperation of the guide part and the movable part, thereby improving the movement accuracy of the end component 3 in the first direction. In an implementation, the guide mechanism has various implementation manners, for example, in one implementation, the guide part can be a guide rail 51, the movable part can be a slider 52 adapted to the guide rail 51, and the end component 3 can be directly or indirectly connected to the slider 52 to synchronize the movement of the slider 52. For example, as shown in Figure 11 In this embodiment, two sets of guide mechanisms are arranged, the guide part of the guide mechanism adopts a guide rail 51, and the movable part of the guide mechanism adopts a slider 52, and the end component 3 is mounted on a connecting plate which simultaneously connects the sliders 52 of the two sets of guide mechanisms, as shown in Figure 11 The slider 52 is movably constrained to the corresponding guide rail 51, and the guide rail 51 is horizontally fixed to the bearing frame 21, and the two guide rails 51 are parallel to each other, as shown in Figure 11 and Figure 12As shown, not only can the end part 3 be ensured to move strictly along the first direction, but also the carrying capacity can be improved. For example, in other embodiments, the guiding part in the guiding mechanism can be a guiding shaft 38 arranged along the first direction, and the movable part in the guiding mechanism can be a guiding hole 42 matched with the guiding shaft 38, the guiding hole 42 being sleeved on the guiding shaft 38, the end part 3 being connected to a connecting piece provided with the guiding hole 42 or the guiding hole 42 being directly provided on the end part 3, and the same effect can also be achieved by the cooperation of the guiding shaft 38 and the guiding hole 42 to ensure the end part 3 to move strictly along the first direction. For example, the guiding part in the guiding mechanism can also be a guiding groove provided on the carrying frame 21, the guiding groove being arranged along the first direction, and the movable part in the guiding mechanism can be a guiding block (such as a T-shaped guiding block) matched with the guiding groove, the guiding block being constrained in the guiding groove and being movable along the guiding groove, and the same effect can also be achieved by connecting the end part 3 to the guiding block, which will not be illustrated one by one here.

[0067] In order to facilitate the power part 22 to drive the end part 3 to move along the first direction, in the implementation, the present folding device 2 further comprises a linear driving module 25, which can be arranged along the first direction in priority, the power part 22 being drivingly connected to the linear driving module 25, and the linear driving module 25 being drivingly connected to the end part 3, so that the power part 22 can drive the end part 3 to move linearly along the first direction through the linear driving module 25, so as to adjust the position of the end part 3 along the first direction by the power part 22, and achieve the purpose of adjusting the length of the folding module 23 according to the actual demand. In the implementation, the linear driving module 25 can adopt the existing linear driving module 25, for example, the linear driving module 25 can adopt a screw-nut mechanism or a gear-rack mechanism or a belt driving mechanism, and as an example, as shown in the drawings, the linear driving module 25 adopts the screw-nut mechanism, the screw-nut mechanism comprising a screw rod 65 and a nut 64 matched with the screw rod 65, the screw rod 65 being provided with an external thread, the nut 64 being threadedly connected to the screw rod 65, the screw rod 65 being arranged along the first direction and being arranged on the carrying frame 21 through a bearing seat, the power part 22 being drivingly connected to the screw rod 65 for driving the screw rod 65 to rotate, the nut 64 being fixed to the end part 3, and the end part 3 being movably constrained in the guiding mechanism, so that the power part 22 can drive the end part 3 to move along the first direction through the screw rod 65. Figure 4

[0068] ​In order to adjust the length of the folding device 2, in one embodiment, one of the end parts 3 of the folding device 2 is movably connected to the carrier frame 21, and the end part 3 can be drivingly connected to the power part 22 in the above-mentioned embodiment, so that the end part 3 can be moved in the first direction, and the other end part 3 can be fixedly installed on the carrier frame 21, so that the power part 22 can drive one of the end parts 3 to move to adjust the distance between the two end parts 3, so as to effectively adjust the length of the folding device 2, so as to be suitable for different sizes of the bag opening 11. In another embodiment, both of the end parts 3 of the folding device 2 can be movably connected to the carrier frame 21, and in the implementation, the two end parts 3 can share a set of guide mechanisms, or each of the two end parts 3 can be provided with a set of guide mechanisms. In the implementation, only one power part 22 can be configured, and the two end parts 3 can be drivingly connected to the same power part 22, so as to drive the two end parts 3 to move simultaneously by using the power part 22. Two power parts 22 can also be configured, and the two power parts 22 are drivingly connected to the two end parts 3 respectively, so as to drive the two end parts 3 to move respectively by using the two power parts 22. As an example, the two end parts 3 can be connected to the same set or multiple sets of guide mechanisms, so as to share one set or multiple sets of guide mechanisms, so that both of the two end parts 3 can be moved in the first direction; in the case of configuring two power parts 22, the two power parts 22 can be drivingly connected to the two end parts 3 through two linear drive modules 25 respectively, the two end parts 3 are symmetrically arranged, and the two power parts 22 drive the two end parts 3 to move synchronously and reversely, as shown in Figure 4 Fig. 2, so as to effectively adjust the length of the folding device 2. As another example, the two end parts 3 can be connected to the same set or multiple sets of guide mechanisms, so as to share one set or multiple sets of guide mechanisms, so that both of the two end parts 3 can be moved in the first direction; in the case of configuring one power part 22, the linear drive module can include a screw rod 65, two nuts 64 matched with the screw rod 65, the screw rod 65 is constructed with two sections of external threads with opposite rotation directions, the two nuts 64 are threadedly connected to the two sections of external threads respectively, the power part 22 is drivingly connected to the screw rod 65, and the two nuts 64 are connected to the two end parts 3 respectively, so that the two end parts 3 can be driven to move synchronously and reversely by using the power part 22, and the middle part 4 in the middle can be driven to move synchronously, so as to effectively change the length of the folding device 2. Of course, in the implementation, the two end parts 3 can also be connected to different guide mechanisms respectively, which will not be illustrated one by one here.

[0069] To enable the intermediate component 4 to move along the first direction, various implementation methods are available. As one example, each intermediate component 4 can be connected to the aforementioned guide mechanism. In this case, the guide mechanism needs to be configured with multiple movable parts to guide the intermediate component 4. That is, the guide mechanism can simultaneously guide both the intermediate component 4 and the end component 3. For example, the guide part in the guide mechanism can be a guide rail 51, and the movable part can be a slider 52 adapted to the guide rail 51. The guide mechanism is equipped with multiple sliders 52 on the guide rail 51, and the end component 3 and each intermediate component 4 are respectively connected to different sliders 52, thereby enabling both the end component 3 and each intermediate component 4 to move strictly along the first direction. As another example, this folding device 2 can also be configured with an independent guide mechanism for each intermediate component 4, such as... Figure 4 and Figure 5 As shown, the guiding mechanism of end component 3 and the guiding mechanism of intermediate component 4 are independent of each other. In implementation, the structure of the guiding mechanism of intermediate component 4 can be the same as that of the guiding mechanism of end component 3. For example, the guiding mechanism of intermediate component 4 may include a guiding part and multiple movable parts that adapt to the guiding part. The guiding part is arranged along the first direction and may be a guide rail 51, a guide shaft 38, a guide groove, etc. Each movable part forms a sliding pair along the first direction with the guiding part. The movable part may be a slider 52, a guide hole 42, a guide block, etc. that adapts to the guiding part. Each intermediate component 4 is connected to the guiding part through the cooperation of each movable part and the guiding part. At this time, it can be understood that the elastic component 26 between intermediate components 4 can also be arranged between two adjacent movable parts. Moreover, when the guiding part adopts a guide shaft 38, the elastic component 26 can also be sleeved on the guide shaft 38 to improve the stability of the elastic component 26 and avoid the problem of local sagging of the elastic component 26 due to gravity.

[0070] To facilitate folding the ends of the bag openings 11 of different sizes along the length direction, the end component 3, facing away from the middle component 4, is further constructed with a hook-shaped first folding structure 31, such as... Figures 6-8 As shown, the first folding structure 31 is used to assist in folding the two ends of the bag opening 11. Specifically, during the folding process, the movement of the end component 3 can drive the hook-shaped first folding structure 31 to move synchronously along the first direction. The movement of the first folding structure 31 along the first direction causes the folding piece 14 at the end of the bag opening 11 to bend, so as to form a fold at the end of the bag opening 11 along the length direction. Figure 4 As shown, since the distance between the two end parts 3 is adjustable, the first folding structure 31 on the end part 3 can be used to assist the bending of the folding pieces at both ends of the bag opening 11 of different sizes during the bag opening process, and form a folding edge to meet the folding edge requirements of any size.

[0071] In implementation, such as Figures 6-8As shown, the first folding structure 31 can include a positioning surface 33 on the inner side and a hook portion 34 protruding from the positioning surface 33, as shown in Figures 6-8 As shown, the hook portion 34 is located on the outer side of the positioning surface 33 in the direction away from the middle part 4, and the hook portion 34 is located on the lower end of the positioning surface 33, as shown in Figures 6-8 As shown, the hook portion 34 is configured with a limiting surface 35 for limiting the folding sheet 14, so that the positioning surface 33 and the limiting surface 35 form a hook shape to realize the folding function in cooperation with the corresponding folding process. In implementation, the positioning surface 33 can be configured as a vertical plane, as shown in Figures 6-8 As shown, in addition, the positioning surface 33 can also be configured as an inclined surface inclined to the vertical direction, and of course, the positioning surface 33 can also be configured as an arc surface. The positioning surface 33 is mainly used for positioning the folding position, and the positioning surfaces 33 on the two end parts 3 correspond to each other. In implementation, the spacing between the two positioning surfaces 33 can be taken as the length of the folding module 23 in the first direction, and the length can be adjusted by the power part 22 so that it adapts to the different sizes of the bag opening 11 to meet the opening bag requirement of the bag opening 11 of different sizes. In implementation, the limiting surface 35 can preferentially adopt a plane. When the positioning surface 33 adopts a vertical plane, the two are perpendicular to each other, as shown in Figures 6-8 As shown, better folding effect can be achieved. In addition, the limiting surface 35 can also be an arc surface or an inclined surface inclined to the horizontal direction, etc. In implementation, the limiting surface 35 can be one surface or a combination of multiple surfaces. In implementation, the width of the limiting surface 35 in the first direction (i.e., the spacing between the positioning surface 33 and the outer side of the hook portion 34) can be determined according to actual requirements, for example, it can be usually determined as 1-5 millimeters.

[0072] In a more perfect scheme, the outer side of the hook portion 34 is also configured with a guide surface 36, as shown in Figures 5-8 As shown, the guide surface 36 extends to the lower end of the end part 3, and the thickness of the end part 3 in the first direction gradually decreases from the upper edge of the guide surface 36 to the lower end of the end part 3, as shown in Figure 7 As shown, so as to form a structure with a small lower end and a large upper end along the length direction of the folding module 23, which can reduce the resistance when the folding module 23 is inserted into the fabric 1, prevent the insertion action from moving the fabric 1 to generate errors, and be conducive to faster and more accurate realization of the opening bag function.

[0073] In order to facilitate folding of the two sides (i.e., the long sides) of the bag opening 11 along the length direction for different sizes of the bag opening 11, in a more perfect scheme, the side surface of the middle part 4 is also configured with a second folding structure 41 in a hook shape, and the second folding structure 41 is used for assisting the folding of the long sides of the bag opening 11, as shown in Figure 9 and Figure 10The second folding structure 41 is configured on the side surface of the middle part 4, so that the change of the interval between the middle parts 4 will not affect and interfere with the second folding structure 41, and because the interval between the middle parts 4 changes uniformly, the second folding structure 41 can be matched with each other under different intervals, and can assist the long side of the bag opening 11 of different sizes to realize the folding function. In the implementation, the second folding structure 41 is adapted to the first folding structure 31, so that the first folding structure 31 and the second folding structure 41 are matched with each other, which can effectively prevent the folding actions in two directions from interfering with each other, so that the folding actions in two directions are more coordinated. For example, the second folding structure 41 can be the same as the first folding structure 31, as shown in Figure 9 and Figure 10 In the embodiment, the second folding structure 41 also includes the positioning surface 33 and the hook portion 34 protruding from the positioning surface 33, and the hook portion 34 is configured with a limiting surface 35 for limiting the folding piece 14. The limiting surface 35 in the second folding structure 41 can be flush with the limiting surface 35 in the second folding structure 41, as shown in Figure 9 and Figure 10 which is beneficial to the folding actions in two directions at the same height, thereby facilitating the simplification of the bag opening process. Meanwhile, the outer side surface of the hook portion 34 in the second folding structure 41 is also configured with a guide surface 36, which extends to the lower end of the middle part 4. From the upper edge of the guide surface 36 to the lower end of the middle part 4, the width of the middle part 4 gradually decreases, as shown in Figure 9 and Figure 10 which is beneficial to the folding actions in two directions at the same height, thereby facilitating the simplification of the bag opening process. Meanwhile, the outer side surface of the hook portion 34 in the second folding structure 41 is also configured with a guide surface 36, which extends to the lower end of the middle part 4. From the upper edge of the guide surface 36 to the lower end of the middle part 4, the width of the middle part 4 gradually decreases, as shown in

[0074] In order to make the first folding structure 31 and the second folding structure 41 better coordinated, in a further embodiment, the side surface of the end part 3 is also configured with a third folding structure 32 in the shape of a hook, which is adapted to the second folding structure 41, and the third folding structure 32 is used to assist the long side of the bag opening 11 to fold, as shown in Figures 5-8 The third folding structure 32 on the side surface of the end part 3 can be matched with the second folding structure 41 on the side surface of the middle part 4, so as to form a folding structure with a longer size and a more continuous structure on the side surface of the entire folding module 23, which not only can meet the folding requirements of the long side of the bag opening 11 of different sizes, but also is beneficial to realizing better folding function and better folding effect. In the implementation, the third folding structure 32 can be connected with the first folding structure 31, and the structure of the third folding structure 32 can be the same as that of the first folding structure 31 or the second folding structure 41, as shown in Figure 4 and Figure 5As shown, in the present embodiment, the third folding structure 32 also comprises a positioning surface 33 and a hook portion 34 protruding from the positioning surface 33, and the hook portion 34 is configured with a limiting surface 35 for limiting the folding sheet 14. The limiting surface 35 in the third folding structure 32 can be flush with the limiting surface 35 in the first folding structure 31 and the limiting surface 35 in the second folding structure 41, as shown in Figures 4-10 As shown, the positioning surface 33 in the third folding structure 32 can be flush with the positioning surface 33 in the second folding structure 41 and perpendicular to the positioning surface 33 in the first folding structure 31, which is conducive to performing the folding action in two directions at the same height, thereby facilitating the simplification of the bag opening process. Meanwhile, the outer side surface of the hook portion 34 in the third folding structure 32 is also configured with a guide surface 36, which extends to the lower end of the end part 3. From the upper edge of the guide surface 36 to the lower end of the end part 3, the width of the end part 3 gradually decreases, as shown in Figure 5 and Figure 8 As shown, so as to make the end part 3 form a structure with a small lower end and a large upper end along the width direction of the folding module 23, the resistance when the folding module 23 is inserted into the fabric 1 can also be reduced.

[0075] Embodiment 2

[0076] In order to simplify the folding process and improve the folding precision, the main difference between the present embodiment 2 and the above-mentioned embodiment 1 is that in the present folding device 2, the two end parts 3 are respectively movably connected to the carrier frame 21, and the two end parts 3 are symmetrically arranged, and the power component 22 drives the two end parts 3 to synchronously and reversely act. With such a design, the extension and retraction of the folding module 23 can be driven with the middle position of the two end parts 3 as the center, so as to achieve the purpose of adjusting the length of the folding module 23 with the middle position of the two end parts 3 as the center. In actual use, not only can the action be simplified and the positioning frequency be reduced, thereby effectively simplifying the folding process and improving the folding efficiency, but also the folding precision can be improved.

[0077] In one embodiment, the folding device 2 is configured with two power components 22, and the two power components 22 are respectively connected to the two end parts 3 through two linear drive modules 25, and the two end parts 3 are driven to synchronously and reversely act through the synchronous action of the two power components 22, as shown in Figure 4 The linear drive module 25 can be implemented by using the above-mentioned technology, which will not be described here.

[0078] In the preferred embodiment provided in the present embodiment, the folding device 2 is configured with one power component 22, and the linear drive module 25 comprises a rotating shaft 61 and two nuts 64, and the rotating shaft 61 comprises a middle shaft section 62 and a screw rod 65 section 63 connected to both ends of the middle shaft section 62, as shown in Figure 11 and Figure 12As shown, the threads of the two screw rods 65 are opposite in direction, and the two screw rods 65 are respectively connected with nuts 64, and the two nuts 64 are respectively connected with the two end parts 3, such as Figure 11 and Figure 12 As shown, the power part 22 is in transmission connection with the intermediate shaft segment 62, so as to drive the rotating shaft 61 to rotate by the power part 22, so that the two nuts 64 can be driven to move synchronously and reversely by the rotation of the rotating shaft 61, and then the two end parts 3 can be driven to move synchronously and reversely, so as to adjust the length of the folding module 23 with the middle position of the two end parts 3 as the center. In the implementation, the power part 22 can be in transmission connection with the intermediate shaft segment 62 through a gear transmission mechanism or a belt transmission mechanism, for example, as shown in Figure 11 and Figure 12 As shown, the output shaft of the power part 22 is provided with a driving pulley 66, the intermediate shaft segment 62 is provided with a driven pulley 67, and the driving pulley 66 and the driven pulley 67 are tensioned with a synchronous belt 68, so that the rotating shaft 61 can be driven to rotate forward or reversely by the power part 22.

[0079] In order to make the fabrics 1 with different thicknesses smoothly complete the folding, and ensure the folding effect, in a further embodiment, the limiting surface 35 of the first folding structure 31 further has a sunken groove 37 on the side close to the positioning surface 33, as shown in Figure 15 Similarly, the limiting surface 35 of the second folding structure 41 further has a sunken groove 37 on the side close to the positioning surface 33, as shown in Figure 15 and Figure 16 Similarly, the limiting surface 35 of the third folding structure 32 further has a sunken groove 37 on the side close to the positioning surface 33, as shown in Figure 16 Not only can the area of the first limiting surface 35 be reduced, so as to reduce the friction in the folding process, but also a containing space can be formed at the position close to the positioning surface 33, so that the fabrics 1 with different thicknesses can be smoothly folded, and the required folding effect can be achieved.

[0080] Embodiment 3

[0081] In order to further improve the moving precision of the intermediate part 4, the main difference between the present embodiment 4 and the above-mentioned embodiment 1 is that, in the folding device 2 provided by the present embodiment, the guide mechanism comprises a guide shaft 38 and a guide hole 42 matched with the guide shaft 38, the guide shaft 38 is arranged along the first direction, and the guide hole 42 is arranged on the intermediate part 4, and the intermediate part 4 is sleeved on the guide shaft 38 through the guide hole 42, so that the intermediate part 4 can be in sliding fit with the guide shaft 38 through the guide hole 42, not only can the guide shaft 38 support the intermediate part 4, but also can guide the movement of the intermediate part 4, so as to improve the action precision.

[0082] In implementation, the guide shaft 38 can be fixed to the carrier 21, and in another embodiment, the guide shaft 38 can be installed to one of the end components 3, and the other end component 3 is also configured with a guide hole 42 matching the guide shaft 38, and the guide shaft 38 passes through each guide hole 42, as shown in the figure. By directly installing the guide shaft 38 to the end component 3, the end component 3 is used as the positioning reference of the guide shaft 38, and the end component 3 moves synchronously with the guide shaft 38, and the intermediate component 4 moves along the guide shaft 38, so that the error caused by the difference in positioning reference can be eliminated, and the movement accuracy of the intermediate component 4 can be further improved. In implementation, the number of guide shafts can be determined according to actual needs, which can be one, two, three, etc., and in an embodiment, each end component 3 is installed with at least one guide shaft 38, and each guide shaft 38 is parallel to each other, as shown in the figure, so that the guide shafts 38 installed on different end components 3 can be staggered with each other, so that at least two guide shafts 38 can be used to guide the movement of the intermediate component 4 and the end component 3, thereby further improving the movement accuracy. At this time, the elastic component 26 can be sleeved on the guide shaft 38, as shown in the figure, so that the guide shaft 38 can support the elastic component 26, and the direction of the elastic force of the elastic component 26 can be ensured to be consistent with the first direction, thereby effectively improving the stability of the elastic component 26. In this embodiment, the elastic component 26 is a conical spring, as shown in the figure, which can be compressed to be flat, so that when it is compressed to the limit position, the distance between the adjacent two intermediate components 4 can be greatly reduced, and the structure of the entire flanging module 23 can be more compact and smaller, which can meet the needs of larger size bag opening 11 while meeting the needs of smaller size bag opening 11. Figures 11-14 Figures 11-14 Figures 11-14 Figures 11-14

[0083] In a further embodiment, one side or both sides of the intermediate component 4 is configured with a groove 43 matching the elastic component 26, as shown in the figure. The groove 43 is in communication with the guide hole 42, and the side of the end component 3 is also configured with a groove 43 matching the elastic component 26, and the groove 43 is in communication with the guide hole 42. The groove 43 is used to accommodate at least part of the elastic component 26, so that when the length of the flanging module 23 is reduced, the elastic component 26 can be accommodated in the corresponding groove 43, so that the adjacent two intermediate components 4 can contact each other, and the adjacent intermediate component 4 and the end component 3 can contact each other, thereby making the minimum length of the flanging module 23 shorter, so as to meet the needs of smaller size bag opening. Figure 16

[0084] Embodiment 4

[0085] ​​​​​In order to facilitate the insertion and withdrawal of the fabric 1, the main difference between the embodiment 4 and the above-mentioned embodiment 1 is that the folding device 2 provided by the embodiment 4 further comprises a lifting power 24, which preferably adopts a motor such as a stepping motor, a servo motor, etc. Figure 11 and Figure 12 The lifting power 24 is in driving connection with the movable frame 212 for driving the movable frame 212 to vertically move.

[0086] In implementation, the carrier frame 21 comprises a fixed frame 211 and a movable frame 212, the movable frame 212 is vertically movable and constrained to the fixed frame 211, the lifting power 24 is installed on the fixed frame 211 and in driving connection with the movable frame 212 for driving the movable frame 212 to vertically move, and the folding module 23 is installed on the movable frame 212 so as to drive the whole folding module 23 to vertically move by the lifting power 24, so that the folding module 23 moves relative to the fabric 1, thereby achieving the purpose of inserting and withdrawing the fabric 1. Figure 11 and Figure 12 In implementation, the movable frame 212 can be connected to the fixed frame 211 by a linear guide rail 51 arranged in the vertical direction, as shown in Figure 11 The lifting power 24 can be in driving connection with the movable frame 212 through a linear driving module 25, so as to drive the movable frame 212 to vertically move by the lifting power 24, and the linear driving module 25 can be a screw-nut mechanism or a gear-rack mechanism or a belt driving mechanism, etc.

[0087] In implementation, the control module is electrically connected with the lifting power 24, so as to control the folding device 2 to vertically move by the control module.

[0088] Embodiment 5

[0089] The embodiment provides an opening bag device, which comprises a rack 7 and the folding device 2 in the above-mentioned embodiments, and the carrier frame 21 of the folding device 2 can be connected to the rack 7, as shown in Figure 17 so as to meet the folding requirements of the bag opening 11 of different sizes by the folding device 2.

[0090] In a more perfect scheme, the opening bag device further comprises a folding pressing frame device 8 matched with the folding device 2, and the folding pressing frame device 8 is used for constraining the fabric 1 and clamping the folded edge, so as to subsequently sew the folded edge.

[0091] In implementation, the folding device 2 can be arranged above the folding pressing frame device 8, as shown in Figure 17As shown, the folding frame device 8 is provided with two groups of folding forming modules 81, each group of folding forming modules 81 includes two oppositely arranged folding forming modules 81, and the two groups of folding forming modules 81 are arranged in a cross shape, so that the four folding forming modules 81 form a rectangle to assist the folding of the four edges of the bag opening 11. As an example, the folding forming module 81 includes a lower pressing component 82, an upper pressing component 83 and a pulling component 84, as shown in Figure 18 As shown, the pulling component 84 is arranged between the lower pressing component 82 and the upper pressing component 83, the lower pressing component 82 can be an elastic plate to press the fabric 1 downward by its own elastic force; the pulling component 84 can be driven by a pulling power to move horizontally, as an example, the pulling power can be a pneumatic cylinder, and the pulling component 84 is drivingly connected with the pneumatic cylinder to drive the pulling component 84 to extend and retract by the pneumatic cylinder; the upper pressing component 83 can be driven by an upper pressing power to press the fabric 1 upward. As an example, the upper pressing power can be a pneumatic cylinder, and the upper pressing component 83 is drivingly connected with the pneumatic cylinder to drive the upper pressing component 83 to move up and down by the upper pressing power to press or release the folding piece 14. In practice, each lower pressing component 82 can be independent or connected as a whole. The control module is electrically connected with the folding frame device 8 to be controlled uniformly by the control module.

[0092] The process flow of opening the bag by the bag opening device includes the following steps: Step 1, the fabric 1 is clamped horizontally between the lower pressing component 82 and the pulling component 84, as shown in Figure 18 At this time, the required seam 13 has been cut in the bag opening area 12 of the fabric 1 in advance. Step 2, adjust the relative position of the folding device 2 and the folding frame device 8, so that the folding device 2 corresponds to the lower bag opening area 12, and the center of the folding device 2 is preferably coincided with the center of the bag opening area 12, as shown in Figure 18 Step 3, according to the length of the bag opening 11, adjust the length of the folding device 2 by the power component 22, so that the length of the folding device 2 is less than the length of the bag opening 11, as shown in Figure 18 Step 4, adjust the relative position of the folding device 2 and the folding frame device 8, so that the lower end of the folding device 2 is inserted into the bag opening area 12, until the plane where the fabric 1 is located corresponds to the positioning surface 33, and the hook portion 34 is located below the fabric 1, as shown in Figure 19 Step 5, according to the length of the bag opening 11, adjust the length of the folding device 2 again by the power component 22, so that the folding device 2 is elongated until the length of the folding device 2 (which can be the distance between the two positioning surfaces 33 on the end surfaces of the two end components 3) is adapted to the length of the bag opening 11, as shown in Figure 20As shown, at this time, the first folding structure 31 at both ends of the folding module 23 corresponds to the two wide edges of the bag opening 11 respectively, the folding structure composed of the second folding structure 41 and the third folding structure 32 at the side of the folding module 23 is just adapted to the wide edge of the bag opening 11, and in this process, the folding sheet 14 at both ends of the bag opening area 12 is extruded by the positioning surface 33 and is constrained by the limiting surface 35, so that the folding sheet 14 is automatically bent, as shown in Figure 20 As shown, at this time, the pulling component 84 corresponds to the bent folding sheet 14. Step 6, the pulling component 84 is controlled to move inward, and the folding sheet 14 is pressed against the positioning surface 33 by the pulling component 84, as shown in Figure 21 As shown. Step 7, the relative position of the folding device 2 and the folding pressing frame device 8 is adjusted, so that the folding device 2 moves upward relative to the folding pressing frame device 8, and the hook portion 34 presses the folding sheet 14 against the pulling component 84, as shown in Figure 22 As shown, through this step, a more perfect folding can be formed, and at this time, the outer edge of the folding sheet 14 is outside the hook portion 34, as shown in Figure 22 As shown. Step 8, the upper pressing component 83 is driven by the upper pressing power to clamp the folding sheet 14, as shown in Figure 23 As shown. Step 9, the pulling component 84 is reversely moved by the pulling power, so that the pulling component 84 exits the folding device 2, as shown in Figure 24 As shown, so as to complete the folding of the two wide edges of the bag opening 11. Similarly, the folding of the two long edges of the bag opening 11 can also be completed by using the same process flow. When the folding is completed, the length of the folding device 2 is adjusted by the power component 22, so that the length of the folding device 2 is less than the length of the bag opening 11, as shown in Figure 25 As shown, and the folding device 2 is moved upward relative to the folding pressing frame device 8, and the fabric 1 and the folding pressing frame device 8 can be exited.

[0093] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A folding device suitable for bag-opening equipment, characterized in that, Including load-bearing support frames; The power unit, used to provide power, is mounted on the support frame; Control module, and A folding module for inserting fabric includes at least two intermediate parts, an elastic part, and two end parts, wherein the two end parts are arranged opposite to each other, and at least one end part is movably connected to a support frame, and the direction of movement of the end part is a first direction. Each intermediate component is movably disposed between two end components. The intermediate components can move along a first direction. The elastic component is disposed between two adjacent intermediate components. The end components are connected to the adjacent intermediate components in a transmission manner. The end component opposite to the middle component has a hook-shaped first folded edge structure and / or the side of the middle component has a hook-shaped second folded edge structure; the first folded edge structure includes a positioning surface and a hook portion protruding from the positioning surface, the hook portion having a limiting surface for limiting the folded edge piece; the second folded edge structure includes a positioning surface and a hook portion protruding from the positioning surface, the hook portion having a limiting surface for limiting the folded edge piece. The control module is connected to the power component, which is connected to the movable end component via a linear drive module. The power component is used to adjust the distance between the two end components. When the two end components approach each other, the elastic potential energy of the elastic component increases. When the end components move away from each other, the elastic potential energy of the elastic component decreases. The elastic component drives the middle component and the end components to move synchronously.

2. The folding device for bag-opening equipment according to claim 1, characterized in that, The side of the end component is constructed with a hook-shaped third folding structure, which is adapted to the second folding structure and is used to assist in folding. The third folding structure includes a positioning surface and a hook portion protruding from the positioning surface, and the hook portion is constructed with a limiting surface for limiting the folded piece.

3. The folding device for bag-opening equipment according to claim 2, characterized in that, The limiting surface in the third folding structure is flush with the limiting surface in the first folding structure and the limiting surface in the second folding structure; the positioning surface in the third folding structure is flush with the positioning surface in the second folding structure and perpendicular to the positioning surface in the first folding structure.

4. The folding device for a bag-opening machine according to claim 1, characterized in that, It also includes a guiding mechanism, which includes a guiding part and multiple movable parts adapted to the guiding part. The guiding part is arranged along a first direction, and each movable part forms a sliding pair with the guiding part. Each intermediate component is connected to the guiding part through the cooperation of each movable part with the guiding part.

5. The folding device for a bag-opening machine according to claim 4, characterized in that, The guide part is a guide shaft, which is arranged along a first direction. The movable part is a guide hole adapted to the guide shaft. The guide hole is constructed in the intermediate component, and the intermediate component is sleeved on the guide shaft through the guide hole.

6. The folding device for a bag-opening machine according to claim 5, characterized in that, The guide shaft is mounted on one of the end components, and the other end component is configured with a guide hole adapted to the guide shaft, through which the guide shaft passes.

7. The folding device for a bag-opening machine according to claim 6, characterized in that, Each end component is equipped with at least one guide shaft, and the guide shafts are parallel to each other; And / or, the elastic component is sleeved on the guide shaft; And / or, the elastic component is a conical spring; And / or, one or both sides of the intermediate component are provided with grooves adapted to the elastic component, the grooves being connected to the guide holes; and / or, one side of the end component is provided with a groove adapted to the elastic component, the grooves being connected to the guide holes; the grooves are used to accommodate at least a portion of the elastic component.

8. The folding device for a bag-opening machine according to claim 1, characterized in that, Two end components are movably connected to the support frame, and the two end components are arranged symmetrically. The power component drives the two end components to move synchronously in opposite directions. And / or, it also includes a guiding mechanism, the guiding mechanism comprising a guiding part and a movable part adapted to the guiding part, the guiding part being arranged along a first direction, the movable part being movably constrained to the guiding part, the guiding part being connected to a support frame, and a movable end component being connected to the movable part.

9. The folding device for a bag-opening machine according to claim 8, characterized in that, The linear drive module includes a rotating shaft and a nut. The rotating shaft includes an intermediate shaft section and lead screw sections connected to both ends of the intermediate shaft section. The threads of the two lead screw sections have opposite directions. Each lead screw section is threaded with a nut, which is connected to an end component. The power component is connected to the intermediate shaft section for transmission.

10. A bag-opening device, characterized in that, It includes a frame, a folding device as described in any one of claims 1-9, and a folding and pressing frame device adapted to the folding device, wherein the folding device and the folding and pressing frame device are respectively connected to the frame.

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