Bag folding apparatus

Abstract

The utility model discloses a kind of bag folding equipment, including bag folding assembly and limiting component, bag folding assembly has bag folding space, and including at least one bag folding component in the first direction located bag folding space side, limiting component includes limiting component in the second direction located both sides of bag folding space, in the second direction to the packaging bag in bag folding space is limited, prevent packaging bag when folding along first direction, second direction deviation or shift occurs, ensure that packaging bag under the action of bag folding component always along first direction neat folding, the structural strength of packaging bag after folding will not be greatly influenced, and through the bag folding posture of each packaging bag folded by this bag folding equipment is basically consistent, multiple packaging bags are stacked and stored when can be closely fitted, flat alignment, will not appear when stacking high and low staggered, skew deviation etc. Problem, greatly improve the utilization of storage space.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag production technology, and in particular to a bag folding device. Background Technology

[0002] To meet the needs of convenient storage, transportation and subsequent packing of packaging bags after mass production, packaging bags that are in an unfolded state after the forming process usually need to be folded by a bag folding machine to compress the unfolded packaging bags into a folded state, so as to reduce the space occupied by the packaging bags and facilitate batch stacking and automated transfer operations.

[0003] In existing technologies, bag folding equipment is usually installed downstream of packaging bag forming equipment. The internal components of the bag folding equipment squeeze the two front sides of the packaging bag, and the pressure from the front sides is transmitted to force the sides of the packaging bag to bend inward, thereby folding the packaging bag.

[0004] However, packaging bags are prone to positional shifts in the non-folding direction during folding, ultimately resulting in misalignment between the two front sides of the folded bag. Standard folding processes require that the two front sides of the bag be aligned and the two sides be folded inward along the creases. Misalignment during folding leads to uneven stress on the two sides of the bag, localized tension, and stress concentration. Under subsequent storage, stacking, and transportation conditions, stress concentration areas are prone to film fatigue and micro-cracks, significantly reducing the overall structural stability of the bag. This can even cause uneven stress on the sealed edges of the bag, leading to the risk of localized opening and tearing, severely reducing the strength and durability of the packaging bag.

[0005] In addition, misaligned folds and misaligned fronts of packaging bags can lead to uneven stacking and misplacement when multiple bags are stacked and stored. This not only significantly reduces the utilization rate of storage space but also affects the orderly storage of packaging bags in batches. Utility Model Content

[0006] The purpose of this invention is to solve the technical problem that in the prior art, when folding bags, the packaging bags are prone to positional shift in the non-folding direction during the folding process, which ultimately leads to misalignment between the front and back of the folded packaging bags. This not only reduces the strength and durability of the packaging bags, but also causes multiple packaging bags to be stacked and stored at different heights and with skewed placement.

[0007] To solve the above-mentioned technical problems, the present invention discloses a bag folding device, including a bag folding assembly and a limiting assembly. The bag folding assembly has a bag folding space and includes at least one bag folding component located beside the bag folding space in a first direction. The limiting assembly includes limiting components located on both sides of the bag folding space in a second direction.

[0008] In this process, the unfolded packaging bag enters the folding space from one end along the conveying direction, the limiting component abuts against the side of the packaging bag located in the folding space in the second direction, and the folding component presses the corresponding side of the packaging bag in the first direction, so that the packaging bag enters the folded state and is output from the other end of the folding space along the conveying direction.

[0009] Furthermore, the first direction, the second direction, and the transmission direction are all perpendicular to each other.

[0010] Using the above technical solution, this bag folding device presses down on one side of the packaging bag through the folding component, causing the packaging bag to fold along the first direction. At least one limiting component abuts against the side of the packaging bag located within the folding space, limiting the packaging bag within the folding space in the second direction. This prevents the packaging bag from shifting or moving in the second direction while folding along the first direction, ensuring that the packaging bag is always folded neatly along the first direction. This reduces the risk of misalignment or crease shift after folding, making the bag layers evenly stacked after folding, avoiding local stress concentration, and ensuring that the structural strength of the folded packaging bag is not significantly affected. This guarantees the overall strength and durability of the bag, reducing the possibility of cracking or damage during subsequent storage and transportation. Furthermore, each packaging bag folded by this bag folding device has a basically consistent folding posture. When multiple packaging bags are stacked and stored, they can fit tightly and be aligned flat, without problems such as unevenness or skew during stacking, greatly improving the utilization rate of storage space.

[0011] The present invention also discloses a bag folding device, wherein the limiting component includes a pair of limiting members respectively disposed on both sides of the bag folding space in the second direction and extending along the transmission direction, and the pair of limiting members respectively abut against the corresponding side of the packaging bag located in the bag folding space.

[0012] Using the above technical solution, a pair of limiting components can symmetrically limit the sides of the packaging bag and extend along the transmission direction, so that the packaging bag will not shift during transmission. As a result, the packaging bag can be kept in the folding space according to the expected posture. When the folding component is pressed and folded later, it can accurately align with the preset folding position of the packaging bag, further ensuring the symmetry and consistency of the folding.

[0013] The present invention also discloses a bag folding device, wherein each limiting component is an integral plate-shaped structure extending along the transmission direction.

[0014] Furthermore, each limiting component has an clearance opening extending along the transmission direction at its center in the first direction.

[0015] Using the above technical solution, the plate-shaped limiting component possesses high structural rigidity and a flat limiting surface, allowing it to form a large-area fit with the side of the packaging bag for limiting. Its limiting stability far surpasses that of point- or strip-shaped limiting structures, greatly restricting any slight deviation or shifting of the packaging bag in the second direction during folding, further improving folding accuracy and posture stability. Simultaneously, the plate-shaped structure ensures uniform force distribution on the sides of the packaging bag during transport, preventing localized compression deformation, wrinkles, or other defects, thus ensuring the flatness and structural integrity of the packaging bag. Furthermore, the avoidance opening in the middle of the limiting component facilitates guiding the packaging bag along the crease into the folding space from both sides in the second direction, without affecting lateral limiting accuracy.

[0016] The present invention also discloses a bag folding device, wherein each limiting component includes a limiting belt group, the limiting belt group includes a plurality of limiting support shafts spaced apart along the transmission direction, and a plurality of limiting belts spaced apart on the plurality of limiting support shafts in a first direction.

[0017] Each limiting component has a clearance opening extending along the transmission direction at its center in the first direction.

[0018] Furthermore, the bag folding device also includes a limit transmission drive component. The output end of the limit transmission drive component is connected to one of the multiple limit support shafts. The limit transmission drive component can drive the limit support shaft and link the limit belt to move synchronously with the packaging bag in the bag folding space along the transmission direction.

[0019] Using the above technical solution, while the limiting belts of a pair of limiting belt groups are abutting against the sides of the packaging bag, the belt body of the limiting belt can be driven to move along the transmission direction by the limiting transmission drive component, and the packaging bag can be smoothly fed along the transmission direction without the need for additional transmission structure. When the packaging bag enters the folding space, the limiting transmission drive component stops driving, and the folding component performs the folding operation. At this time, the limiting belt plays a limiting role.

[0020] Compared to plate-shaped limiting components, the limiting belt can maintain a relatively static synchronous feeding state with the side wall of the packaging bag during the transportation process, reducing problems such as jamming, deviation, side scratches, wrinkles and deformation caused by frictional resistance between the packaging bag and the static limiting structure during transportation.

[0021] The present invention also discloses a bag folding device, which further includes an adjusting component. The adjusting component is connected to a pair of limiting components and can move synchronously in opposite directions in a second direction, thereby adjusting the distance between the pair of limiting components in the second direction.

[0022] By adopting the above technical solution, the distance adjustment component can precisely adjust the distance between a pair of limiting components in the second direction according to packaging bags of different widths and specifications, so that the pair of limiting components always accurately fit the corresponding sides of different packaging bags, ensuring the positioning accuracy and limiting stability of various packaging bags during the folding process. It can be adapted to batch folding of multiple types of packaging bags, greatly improving the applicability of bag folding equipment.

[0023] The present invention also discloses a bag folding device, which further includes an adjustable guide extending along a second direction, and a pair of limiting components are slidably disposed on the adjustable guide.

[0024] Furthermore, the pitch adjustment component includes a pitch adjustment drive and a pitch adjustment transmission component. The output end of the pitch adjustment drive is connected to the pitch adjustment transmission component, and the pitch adjustment transmission component is connected to a pair of limiting components respectively. The pair of limiting components can move synchronously towards or away from each other along the pitch adjustment guide.

[0025] By employing the above technical solution, the spacing guide provides precise guidance for adjusting the spacing of a pair of limiting components, limiting deviations in other directions during the adjustment process. This ensures that the pair of limiting components move smoothly only along the second direction, significantly improving the accuracy and stability of the spacing adjustment and reducing limiting errors caused by adjustment deviations. Furthermore, the power of the drive component is transmitted to the pair of limiting components through the transmission component, enabling synchronous and symmetrical movement of the pair of limiting components. This ensures that the pair of limiting components are always symmetrically positioned on both sides of the folding space in the second direction, reducing defects such as bag skewing, front misalignment, and uneven crease depth caused by asymmetry in the pair of limiting components.

[0026] The present invention also discloses a bag folding device, wherein the adjustable guide includes an adjustable guide rail, and the end of each limiting component is slidably disposed on the adjustable guide rail.

[0027] The pitch adjustment drive is configured as a pitch adjustment drive motor, and the pitch adjustment transmission component includes a pitch adjustment screw located beside the pitch adjustment guide rail and extending along the second direction. The outer peripheral wall of the pitch adjustment screw is provided with two threaded segments spaced apart in the second direction. The two threaded segments have opposite directions of rotation and are respectively threadedly connected to the corresponding threaded holes of a pair of limiting components.

[0028] By adopting the above technical solution, the adjustable guide rail slides in conjunction with a pair of limiting components, which improves the stability and accuracy of the movement of the pair of limiting components. When the adjustable drive motor drives the adjustable screw to rotate, it can drive the pair of limiting components to move accurately and symmetrically in sync. The transmission method of the adjustable screw has the advantages of high transmission accuracy and strong self-locking. After adjustment, the distance between the pair of limiting components can be accurately locked, avoiding the problems of distance deviation and loosening of the limit caused by the vibration of the bag folding equipment.

[0029] The present invention also discloses a bag folding device, wherein the bag folding assembly includes a pair of bag folding components respectively disposed on both sides of the bag folding space in a first direction. The pair of bag folding components move toward each other in the first direction and simultaneously press against a pair of front sides of the packaging bag located in the bag folding space.

[0030] Using the above technical solution, the packaging bag is folded by pressing the two front sides of the bag synchronously by a pair of folding components. The two front sides of the packaging bag are subjected to uniform and symmetrical force. During the folding process, the bag body is subjected to balanced force, avoiding problems such as bag body displacement, misalignment and local wrinkles, so that the folds on both sides of the packaging bag are symmetrical.

[0031] The present invention also discloses a bag folding device, each bag folding component including a bag folding belt assembly, the bag folding belt assembly including a bag folding belt extending along the transmission direction, and a plurality of bag folding support shafts spaced apart in the transmission direction to support the bag folding belt.

[0032] Furthermore, the bag folding device also includes a bag folding drive unit and a bag folding transmission belt assembly disposed at the output end of the bag folding drive unit. The bag folding transmission belts of the bag folding transmission belt assembly are fixedly connected to the corresponding bag folding support shafts in a pair of bag folding belt assemblies on opposite sides, and move in conjunction with the pair of bag folding belt assemblies in the first direction towards or away from each other.

[0033] Using the above technical solution, the bag folding drive unit links a pair of bag folding belts to bring them closer together, ensuring that the pressing stroke and pressing speed on both sides are completely consistent. Multiple bag folding support shafts can stably support the bag folding belts, ensuring that the pressing surface is flat and uniform. Furthermore, the bag folding belts can flexibly press on the corresponding front side of the packaging bag. Compared with a rigid pressure plate extrusion structure, this can avoid problems such as localized crushing, tearing, and film stretching deformation of the packaging bag caused by rigid impact, thus protecting the structural integrity of the packaging bag's appearance.

[0034] The present invention also discloses a bag folding device, wherein each bag folding belt group further includes a bag folding transmission drive component, each bag folding transmission drive component is connected to a bag folding support shaft in the corresponding bag folding belt group, and the linked bag folding belt moves synchronously with the packaging bag in the bag folding space along the transmission direction.

[0035] Using the above technical solution, the bag folding conveyor drive can link the bag folding belt and the packaging bag in the bag folding space to move synchronously along the conveying direction. It not only plays the role of pressing and folding the packaging bag, but also plays the role of conveying the packaging bag. There is no need to set up a special conveying structure, which simplifies the structure of the bag folding equipment and makes the structure of the bag folding equipment more compact.

[0036] The present invention also discloses a bag folding device, which further includes a pair of folding guide components spaced apart on both sides of the bag folding space in a second direction. The folding guide components are located at a position opposite to the bag folding space on the corresponding side limiting part. Each folding guide component has a guide part that can move toward the bag folding space and pass through the avoidance opening on the limiting part to abut against the crease on the packaging bag.

[0037] By adopting the above technical solution, the guiding part of the folding guide component acts on the crease of the packaging bag, guiding the packaging bag to bend neatly along the preset crease position. Compared with the packaging bag folding naturally along the crease, it can greatly reduce the problems of crease deviation and folding deformation of the packaging bag.

[0038] The present invention also discloses a bag folding device, wherein each folding guide component includes a side crease guide component, the side crease guide component having a side crease guide portion for guiding the side of the packaging bag in the bag folding space to fold along the side crease.

[0039] By adopting the above technical solution, the side of the packaging bag is precisely guided to fold along the preset side crease by the side crease guide, ensuring that the folding height and folding angle of both sides are completely consistent. This reduces problems such as easy skewing, wrinkling, misalignment, and distortion of the bag body and misalignment of the front caused by asymmetrical folding of the side of the packaging bag, thereby improving the regularity and symmetry of the side folding of the packaging bag.

[0040] The present invention also discloses a bag folding device, wherein at least one folding guide component further includes a bottom crease guide component, the bottom crease guide component having a bottom crease guide portion for guiding the bottom surface of the packaging bag in the folding space to fold along the bottom crease.

[0041] Using the above technical solution, conventional bag folding equipment can only achieve side folding guidance, while bottom folding is mostly free bending, which is prone to problems such as bottom fold offset, unevenness, and bottom misalignment. This bag folding equipment guides the bottom of the packaging bag to fold accurately along the bottom fold through the bottom fold guide, reducing bag deformation and stacking skew caused by bottom fold misalignment.

[0042] The beneficial effects of this utility model are as follows:

[0043] This utility model discloses a bag folding device, including a bag folding assembly and a limiting assembly. The bag folding assembly has a bag folding space and includes at least one bag folding component located beside the bag folding space in a first direction. The limiting assembly includes limiting components located on both sides of the bag folding space in a second direction, which limit the packaging bag in the bag folding space in the second direction to prevent the packaging bag from shifting or moving in the second direction when folded along the first direction. This ensures that the packaging bag is always folded neatly along the first direction under the action of the bag folding component, and the structural strength of the folded packaging bag is not greatly affected. Moreover, the folding posture of each packaging bag folded by this bag folding device is basically the same. When multiple packaging bags are stacked and stored, they can fit tightly and be aligned flat, without problems such as unevenness or skewness during stacking, which greatly improves the utilization rate of storage space. Attached Figure Description

[0044] Figure 1 This is a three-dimensional structural diagram of the bag folding device provided in an embodiment of the present utility model;

[0045] Figure 2 A three-dimensional structural diagram of a limiting component and an adjusting component of a bag folding device provided in an embodiment of this utility model;

[0046] Figure 3 A three-dimensional structural schematic diagram of another limiting component and adjusting component of the bag folding device provided in this embodiment of the utility model;

[0047] Figure 4 A three-dimensional structural schematic diagram of the bag folding component of the bag folding device provided in an embodiment of this utility model;

[0048] Figure 5 A three-dimensional structural schematic diagram of a folding guide component of a bag folding device provided in an embodiment of this utility model;

[0049] Figure 6 A three-dimensional structural schematic diagram of another folding guide component of the bag folding device provided in an embodiment of this utility model;

[0050] Figure 7 A three-dimensional structural diagram of the limiting component, folding guide component, and adjusting component of the bag folding device provided in the embodiments of this utility model.

[0051] Explanation of reference numerals in the attached figures:

[0052] 10. Bag folding equipment;

[0053] 100. Folding bag assembly;

[0054] 110. Folding bag assembly; 111. Folding bag belt assembly; 112. Folding bag support shaft; 113. Folding bag belt;

[0055] 120. Folding bag drive unit; 130. Folding bag conveyor drive unit;

[0056] 200, Limiting component; 201, Clearance opening; 210, Limiting part; 211, Limiting plate;

[0057] 212. Limiting belt assembly; 213. Limiting support shaft; 214. Limiting belt;

[0058] 220. Limit transmission drive component;

[0059] 300. Adjustment component; 301. Adjustment guide; 302. Adjustment rail; 303. Base;

[0060] 310. Pitch adjustment drive component; 311. Pitch adjustment drive motor; 320. Pitch adjustment transmission component; 321. Pitch adjustment lead screw;

[0061] 400. Folding guide components;

[0062] 410. Side crease guide component; 411. Side crease guide part; 412. Side crease drive component; 413. Side crease guide component;

[0063] 420. Bottom crease guide component; 421. Bottom crease guide part; 422. Bottom crease drive component; 423. Bottom crease guide component; 424. Bottom crease extension drive component; 425. Bottom crease extension guide component;

[0064] Z, first direction; X, second direction; Y, transmission direction. Detailed Implementation

[0065] In existing bag folding equipment, the packaging bag is prone to positional shift in the non-folding direction during the folding process. This results in misalignment between the front and back of the folded packaging bag, which not only reduces the strength and durability of the packaging bag, but also causes multiple packaging bags to be stacked and stored at different heights and with skewed placement.

[0066] Therefore, this utility model provides a bag folding device, which improves the folding accuracy of the packaging bag by setting a limiting component on one side of the bag folding space to restrict the offset of the packaging bag in the non-folding direction.

[0067] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0068] like Figure 1As shown, this embodiment provides a bag folding device 10. This bag folding device 10 is usually set on one side of the outlet end of the forming device, and there is a transfer structure between the bag folding device 10 and the forming device. The bag folding device 10 includes a bag folding component 100 and a limiting component 200. The bag folding component 100 has a bag folding space.

[0069] The folding bag assembly 100 includes at least one folding bag component 110 located beside the folding bag space in the first direction Z. The folding bag component 110 can be disposed on one side of the folding bag space in the first direction Z, and the folding bag component 110 can squeeze the front of the packaging bag located in the folding bag space along the first direction Z, while the other front side of the packaging bag is held abutted by other components (such as conveying components or support platforms), thereby causing the packaging bag to fold. Alternatively, the folding bag components 110 can be disposed on both sides of the first direction Z, and the two folding bag components 110 squeeze the corresponding front side of the packaging bag in opposite directions, thereby causing the packaging bag to fold.

[0070] The packaging bag can be conveyed by a dedicated pushing structure on the folding bag device 10, or by integrating a conveying function into the folding bag assembly 100 and the limiting assembly 200, or by integrating a conveying function into either the folding bag assembly 100 or the limiting assembly 200. The packaging bag is then conveyed into the folding space, where the folding bag assembly 100 pushes the packaging bag to fold along the first direction Z. After the packaging bag is folded, it is then conveyed out of the folding space. Furthermore, the folding bag assembly 100 can push the front of the packaging bag by moving towards each other along the first direction Z, or the distance between the folding bag assembly 100 and the folding space at the side of the packaging bag in the first direction Z gradually decreases along the conveying direction Y. The packaging bag is compressed as it moves along the conveying direction Y and is ultimately folded in the first direction Z. This embodiment does not limit this to a single method.

[0071] The limiting component 200 includes limiting members 210 located on both sides of the folding space in the second direction X. The limiting members 210 can be provided with a plate-shaped, rod-shaped or block-shaped structure, and their surfaces near the wall of the folding space are used to abut against the corresponding sides of the packaging bag, thereby limiting the lateral deviation of the packaging bag in the second direction X.

[0072] It should be noted that the bag folding device 10 also includes a frame, and the bag folding component 100 and the limiting component 200 are disposed on the frame. This embodiment does not specifically limit the specific structure of the frame.

[0073] In this embodiment, the unfolded packaging bag enters the folding space from one end along the transport direction Y. The limiting component 210 abuts against the side of the packaging bag located within the folding space in the second direction X. The folding component 110 presses down on the corresponding side of the packaging bag along the first direction Z, causing the packaging bag to fold and exit from the other end of the folding space along the transport direction Y. Furthermore, the first direction Z, the second direction X, and the transport direction Y are all perpendicular to each other. In this embodiment, the first direction Z is taken as the vertical direction, and the second direction X and the transport direction Y are taken as two mutually perpendicular directions in the horizontal plane for explanation.

[0074] This bag folding device 10 presses down on one side of the packaging bag via the folding component 110, causing the bag to fold along the first direction Z. At least one limiting component 210 abuts against the side of the packaging bag within the folding space, limiting the packaging bag within the folding space in the second direction X. This prevents the packaging bag from shifting or moving in the second direction X while folding along the first direction Z, ensuring that the packaging bag is always folded neatly along the first direction Z. This reduces the risk of misalignment or crease shift after folding, resulting in uniform stacking of the bag body after folding. It avoids local stress concentration, and the structural strength of the folded packaging bag is not significantly affected, ensuring the overall strength and durability of the bag body and reducing the possibility of cracking or damage during subsequent storage and transportation. Furthermore, each packaging bag folded by this bag folding device 10 has a basically consistent folding posture. When multiple packaging bags are stacked and stored, they can fit tightly and be aligned flat, without problems such as unevenness or skew during stacking, greatly improving the utilization rate of storage space.

[0075] Specifically, the limiting component 200 includes a pair of limiting members 210 respectively disposed on both sides of the folding space in the second direction X and extending along the transmission direction Y. The pair of limiting members 210 respectively abut against the corresponding sides of the packaging bag located in the folding space, which can form symmetrical limiting on both sides of the packaging bag, so that the packaging bag will not shift during transmission, and the packaging bag can be kept in the folding space according to the expected posture. When the folding component 110 is pressed and folded later, it can accurately align with the preset folding position of the packaging bag, further ensuring the folding symmetry and consistency.

[0076] Furthermore, such as Figure 2As shown, each limiting component 210 has an overall plate-like structure extending along the transmission direction Y. For example, it includes a limiting plate 211. The limiting plate 211 has the characteristics of strong structural rigidity and flat limiting surface. It can form a large-area fit and limiting with the side of the packaging bag. The limiting stability is far superior to point-like or strip-like limiting structures. It greatly limits the slight deviation or movement of the packaging bag in the second direction X during folding, and further improves the folding accuracy and posture stability. At the same time, the plate-like structure can ensure that the side of the packaging bag is evenly stressed during the transmission process, and there will be no defects such as local compression deformation or wrinkles, ensuring the flatness of the packaging bag's appearance and structural integrity.

[0077] Furthermore, each limiting plate 211 has an avoidance opening 201 extending along the transmission direction Y at the center of the first direction Z, which facilitates guiding the structure of the packaging bag bent along the crease into the bag folding space from both sides of the second direction X without affecting the lateral limiting accuracy.

[0078] Of course, such as Figure 3 As shown, each limiting component 210 may also include a limiting belt assembly 212. The limiting belt assembly 212 includes multiple limiting support shafts 213 spaced apart along the transmission direction Y, and multiple limiting belts 214 spaced apart on the multiple limiting support shafts 213 in the first direction Z. Specifically, the limiting belt assembly 212 includes two limiting support shafts 213 spaced apart along the transmission direction Y. The two limiting supports are fitted with two limiting belts 214, and the two limiting belts 214 are spaced apart in the first direction Z. That is, the gap between the two limiting belts 214 in the first direction Z is the clearance opening 201, which facilitates guiding the packaging bag into the folding space from both sides of the second direction X along the folded structure. Of course, the limiting belt assembly 212 may include three, four, or other numbers of limiting support shafts 213, and three, five, six, or other numbers of limiting belts 214 may be fitted on the multiple limiting support shafts 213, depending on actual needs.

[0079] Furthermore, the bag folding device 10 also includes a limiting transmission drive 220 mounted on the frame. The output end of the limiting transmission drive 220 is connected to one of the multiple limiting support shafts 213. The limiting transmission drive 220 can drive the limiting support shaft 213 and move the limiting belt 214 synchronously with the packaging bag in the bag folding space along the transmission direction Y.

[0080] In this embodiment, while the limiting belts 214 of the pair of limiting belt groups 212 are abutting against the two sides of the packaging bag, the limiting belt 214 can be driven to move along the transmission direction Y by the limiting transmission drive 220, and the packaging bag can be smoothly fed along the transmission direction Y. No additional transmission structure is required. When the packaging bag enters the folding space, the limiting transmission drive 220 stops driving, and the folding component 110 performs the folding operation. At this time, the limiting belts 214 play a limiting role.

[0081] Compared to the plate-shaped limiting component 210, the limiting belt 214 can maintain a relatively static synchronous feeding state with the side wall of the packaging bag during the transportation process, reducing problems such as jamming, offset, side scratches, wrinkles and deformation caused by frictional resistance between the packaging bag and the static limiting structure during the transportation process.

[0082] Of course, the specific structure of the limiting component 210 is not limited to the two structures mentioned above. It can also be configured as multiple limiting rods spaced apart along the first direction Z, and each limiting rod can extend along the transmission direction Y. The limiting components 210 on both sides can adopt the same structure, for example, both can adopt limiting plates 211, or both can adopt limiting belt groups 212. Alternatively, the limiting components 210 on both sides can adopt different structural combinations, for example, one side can adopt a limiting plate 211 and the other side can adopt a limiting belt group 212, or one side can adopt a limiting plate 211 and the other side can adopt a limiting rod. This embodiment does not limit this to a single structure.

[0083] Furthermore, in this embodiment, as Figure 2 and Figure 3 As shown, the bag folding device 10 also includes a spacing adjustment component 300, which is connected to a pair of limiting components 210 for transmission, and can move synchronously with the pair of limiting components 210 in the second direction X, either towards or away from each other, and adjust the distance between the pair of limiting components 210 in the second direction X.

[0084] In other words, the adjustable distance component 300 can precisely adjust the distance between a pair of limiting components 210 in the second direction X according to packaging bags of different widths and specifications, so that the pair of limiting components 210 always accurately fit the corresponding sides of different packaging bags, ensuring the positioning accuracy and limiting stability of various packaging bags during the folding process. It can be adapted to batch folding of multiple types of packaging bags, greatly improving the applicability of the bag folding equipment 10.

[0085] Furthermore, the bag folding device 10 also includes an adjustment guide 301 extending along the second direction X. A pair of limiting components 210 are slidably disposed on the adjustment guide 301. The adjustment guide 301 provides precise guidance for the spacing adjustment of the pair of limiting components 210, restricts the offset of the limiting components 210 in other directions during the adjustment process, and ensures that the pair of limiting components 210 only move smoothly along the second direction X, which greatly improves the accuracy and stability of the spacing adjustment of the pair of limiting components 210 and reduces the limiting error caused by the adjustment deviation.

[0086] Specifically, the adjustment component 300 includes an adjustment drive component 310 and an adjustment transmission component 320. The output end of the adjustment drive component 310 is connected to the adjustment transmission component 320, and the adjustment transmission component 320 is connected to a pair of limiting components 210 respectively. The pair of limiting components 210 can move synchronously towards or away from each other along the adjustment guide component 301, so that the pair of limiting components 210 are always symmetrically located on both sides of the folding pocket space in the second direction X, reducing defects such as bag body skewing, front misalignment, and uneven depth of left and right folds caused by the asymmetry of the pair of limiting components 210.

[0087] More specifically, the adjustable guide 301 includes an adjustable guide rail 302, and the end of each limiting component 210 is slidably disposed on the adjustable guide rail 302. The adjustable guide 301 may be a guide groove or a guide rod, etc.

[0088] The pitch adjustment drive 310 is configured as a pitch adjustment drive motor 311, and the pitch adjustment transmission 320 includes a pitch adjustment screw 321 located beside the pitch adjustment guide rail 302 and extending along the second direction X. The outer peripheral wall of the pitch adjustment screw 321 is provided with two threaded segments spaced apart in the second direction X. The two threaded segments have opposite directions of rotation and are respectively threadedly connected to the corresponding threaded holes of a pair of limiting components 210.

[0089] It should be noted that the adjusting component 300 is also provided with a pair of bases 303 spaced apart along the second direction X. When the limiting component 210 includes a limiting plate 211, the limiting plate 211 is installed on the base 303 by a mounting bracket. When the limiting component 210 includes a limiting belt assembly 212, multiple limiting support shafts 213 of the limiting belt assembly 212 are installed on the base 303. The two threaded sections of the adjusting screw 321 are respectively connected to the corresponding threaded holes on the base 303, and the base 303 is slidably connected to the adjusting guide rail 302 by a slider. Of course, in order to improve the guiding stability, two adjusting guide rails 302 extending along the second direction X can be provided on the frame, and the two adjusting guide rails 302 are spaced apart in the transmission direction Y. Each base 303 is connected to the adjusting guide rail 302 by a corresponding slider.

[0090] In this embodiment, the adjustable guide rail 302 slides with a pair of limiting components 210 to improve the stability and accuracy of the pair of limiting components 210 during movement. When the adjustable drive motor 311 drives the adjustable screw 321 to rotate, it can drive the pair of limiting components 210 to move precisely and symmetrically in sync. The transmission method of the adjustable screw 321 has the advantages of high transmission accuracy and strong self-locking. After adjustment, it can accurately lock the distance between the pair of limiting components 210, avoiding distance deviation and loosening of the limit caused by the vibration of the bag folding device 10 during operation.

[0091] Of course, the pitch adjustment drive 310 can also be configured as a bidirectional pitch adjustment cylinder, and the pitch adjustment transmission 320 can be configured as a symmetrically hinged linkage swing arm assembly. The bidirectional pitch adjustment cylinder is fixedly mounted on the frame, and the two ends of the bidirectional pitch adjustment cylinder are respectively hinged to the two sides of the linkage swing arm. The ends of the two sides of the linkage swing arm are respectively connected to a pair of limiting components 210. When the bidirectional pitch adjustment cylinder extends or retracts, the two sides of the base 303 are pushed and pulled synchronously by the two ends of the linkage swing arm, which drives the pair of limiting components 210 to move synchronously towards or away from each other along the second direction X, thereby achieving symmetrical pitch adjustment.

[0092] Alternatively, the pitch-adjusting drive component 310 can be configured as a pitch-adjusting servo motor, and the pitch-adjusting transmission component 320 can be configured as a synchronous pulley set and an annular synchronous belt. The synchronous belt is mounted around the outside of the synchronous pulley set along the second direction X, and the two sides of the synchronous belt form opposite motion strokes. A pair of limiting components 210 are respectively fixedly connected to the two opposite belt sides of the synchronous belt. The pitch-adjusting servo motor drives the synchronous pulley set to rotate, so that the synchronous belt continuously circulates. Utilizing the characteristic that the upper and lower sections of the belt move in opposite directions, the pair of limiting components 210 are pulled to slide synchronously towards or away from each other.

[0093] Of course, the adjusting component 300 can also be equipped with a pair of adjusting drive components 310, such as a pair of linear motors or drive cylinders, which are respectively connected to a pair of limiting components 210 for transmission. Each of them can adjust the position of the corresponding limiting component 210 in the second direction X, thereby changing the distance between the pair of limiting components 210 in the second direction X.

[0094] Therefore, this embodiment does not limit the specific structure of the adjusting component 300 for adjusting the spacing of a pair of limiting components 210 in the second direction X.

[0095] The specific structure of the bag folding component 100 of the bag folding device 10 will be described in detail below.

[0096] In this embodiment, as Figure 4As shown, the folding bag assembly 100 includes a pair of folding bag components 110 respectively disposed on both sides of the folding bag space in the first direction Z. The pair of folding bag components 110 move toward each other in the first direction Z and simultaneously press on a pair of front faces of the packaging bag located in the folding bag space. The pair of front faces of the packaging bag are subjected to uniform and symmetrical force. During the folding process, the bag body is subjected to balanced force, avoiding problems such as bag body offset, misalignment and local wrinkles, so that the folds on both sides of the packaging bag are symmetrical.

[0097] Specifically, each folding bag component 110 includes a folding bag belt assembly 111, which includes a folding bag belt 113 extending along the transport direction Y, and a plurality of folding bag support shafts 112 spaced apart in the transport direction Y to support the folding bag belt 113.

[0098] Furthermore, the bag folding device 10 also includes a bag folding drive unit 120 and a bag folding transmission belt assembly disposed at the output end of the bag folding drive unit 120. The bag folding transmission belts of the bag folding transmission belt assembly are fixedly connected to the corresponding bag folding support shafts 112 in a pair of bag folding belt assemblies 111 on opposite sides, and are linked to the movement of the pair of bag folding belt assemblies 111 towards each other or away from each other along the first direction Z. Of course, the bag folding component 110 may also be provided with a flat plate structure or a pressing mesh with multiple gaps; this embodiment does not limit this to a single option.

[0099] In this embodiment, the folding drive unit 120 drives a pair of folding belt assemblies 111 to move closer together, ensuring that the pressing stroke and pressing speed on both sides are completely consistent. Multiple folding support shafts 112 can stably support the folding belt 113, ensuring that the pressing surface is flat and uniform. Furthermore, the folding belt 113 can flexibly press on the corresponding front side of the packaging bag. Compared with a rigid pressure plate extrusion structure, it can avoid problems such as local crushing, tearing, and film stretching deformation of the packaging bag caused by rigid impact, thus protecting the structural integrity of the packaging bag's appearance.

[0100] Furthermore, in this embodiment, as Figure 4 As shown, each bag folding belt assembly 111 also includes a bag folding transmission drive 130. Each bag folding transmission drive 130 is connected to a bag folding support shaft 112 in the corresponding bag folding belt assembly 111. The linked bag folding belt 113 moves synchronously with the packaging bag in the bag folding space along the transmission direction Y. In other words, a pair of bag folding belt assemblies 111 not only plays the role of pressing and folding the packaging bag, but also plays the role of transmitting the packaging bag. There is no need to set up a special transmission structure, which simplifies the structure of the bag folding device 10 and makes the structure of the bag folding device 10 more compact.

[0101] It should be noted that, in this embodiment, both the bag folding drive 120 and the bag folding transmission drive 130 can be motors, cylinders or hydraulic cylinders commonly used in the art, and this embodiment does not limit them to a single type.

[0102] To improve the success rate of folding packaging bags, in this embodiment, as follows: Figure 1 As shown, the bag folding device 10 also includes a pair of folding guide components 400 spaced apart on both sides of the bag folding space in the second direction X. The folding guide components are located at the position opposite to the corresponding side limiting part of the bag folding space. Each folding guide component 400 has a guide part that can move toward the bag folding space and pass through the clearance opening 201 on the limiting part 210 to abut against the crease on the packaging bag. By the guide part of the folding guide component 400 acting on the crease of the packaging bag, the packaging bag is guided to bend neatly along the preset crease position. Compared with the packaging bag folding naturally along the crease, the problem of packaging bag crease offset and folding deformation can be greatly reduced.

[0103] Specifically, such as Figure 5 As shown, each folding guide component 400 includes a side crease guide component 410. The side crease guide component 410 has a side crease guide portion 411, which is used to guide the side of the packaging bag in the folding space to fold along the side crease, ensuring that the folding height and folding angle of both sides are completely consistent, reducing problems such as easy skewing, wrinkles, misalignment, and bag body distortion and front misalignment caused by asymmetrical folding of the side of the packaging bag, and improving the regularity and symmetry of the side folding of the packaging bag.

[0104] Specifically, the side crease guide 411 is typically configured as a plate-like structure extending along the transport direction Y. The side crease guide 411 can move along the second direction X, thereby pressing the side crease on the corresponding side of the packaging bag within the crease space with its edge close to the crease space. Of course, the side crease guide 411 can also be configured as a rod-like structure or a wedge-shaped block structure, with the wedge-shaped block having an outwardly protruding edge for pressing the side crease of the packaging bag.

[0105] Furthermore, the side crease guide component 410 also includes a side crease drive component 412 and a side crease guide component 413 (e.g., a guide rail or guide groove) extending along the second direction X. The side crease guide portion 411 is slidably disposed on the side crease guide component 413 and connected to the output end of the side crease drive component 412. The side crease drive component 412 can drive the side crease guide portion 411 to move along the second direction X. Specifically, the side crease drive component 412 can be a power source such as a linear motor or a drive cylinder commonly used in the art. This embodiment does not limit it to a single power source.

[0106] In this embodiment, the side folding drive 412 can drive the side fold guide 411 to push the side fold on the corresponding side of the packaging bag within the folding space, thereby causing the side to fold inward along the side fold when the two front faces of the packaging bag approach each other along the first direction Z. Furthermore, the side folding drive 412 can adjust the pushing force and pushing stroke according to the different thicknesses of the packaging bag sidewalls and the differences in fold depth, ensuring that the side fold guide 411 closely fits the fold position of the packaging bag, avoiding problems such as insufficient pushing, shallow fold formation, and sidewall wrinkles.

[0107] Furthermore, conventional bag folding equipment 10 can only guide side folding; bottom folding is mostly free bending, which easily leads to problems such as bottom crease misalignment, unevenness, and bottom misalignment. Therefore, in this embodiment, as... Figure 5 As shown, at least one folding guide component 400 also includes a bottom crease guide component 420. The bottom crease guide component 420 has a bottom crease guide portion for guiding the bottom surface of the packaging bag within the folding space to fold along the bottom crease, reducing bag deformation and stacking misalignment caused by bottom folding misalignment. It should be noted that the bottom crease guide component 420 can be provided on one folding guide component 400, or it can be provided on both of a pair of folding guide components 400. This embodiment does not limit this to a single method.

[0108] Specifically, the end of the bottom crease guide can press the bottom crease on the bottom surface of the packaging bag in the transmission direction Y by means of translation and / or rotation.

[0109] The bottom crease guide component 420 includes a bottom crease drive component 422 and a bottom crease guide component 423 (e.g., a guide rail or guide groove) extending along the transmission direction Y. The bottom crease drive component 422 can drive the end of the bottom crease guide portion 421 to translate relative to the folding pocket space along the second direction X. An intermediate plate can also be slidably disposed on the bottom crease guide component 423. The bottom crease guide portion 421 is disposed on the intermediate plate. Furthermore, the intermediate plate is also provided with a bottom crease insertion drive component 424 and a bottom crease insertion guide component 425 extending along the second direction X. The bottom crease guide portion 421 is disposed on the bottom crease insertion guide component 425 (e.g., a guide rail or guide groove) and is drively connected to the output end of the bottom crease insertion drive component 424. The bottom crease guide portion 421 is configured as a plate-like structure. It has a connecting portion extending along the second direction X and a hook portion located on the side of the connecting portion near the folding space. The hook portion extends along the transmission direction Y. Under normal conditions, the hook portion of the bottom fold guide portion 421 is located outside the folding space in the second direction X, avoiding interference with the transmission of the packaging bag along the transmission direction Y. Until the packaging bag is located in the folding space, the bottom fold extension drive member 424 drives the bottom fold guide portion 421 to move along the bottom fold extension guide member 425 into the folding space, and aligns it with the fold on the bottom surface of the packaging bag in the transmission direction Y. Then, during the folding process of the packaging bag, the bottom push drive member drives the intermediate plate and links the bottom fold guide portion 421 to move towards the bottom surface of the packaging bag in the transmission direction Y, thereby pushing against the fold on the bottom surface of the packaging bag. The bottom fold drive member 422 and the bottom fold extension drive member 424 can both be commonly used power sources such as motors, hydraulic cylinders or pneumatic cylinders in the art, and this embodiment does not limit them to a single power source.

[0110] like Figure 6 As shown, the bottom folding drive 422 can also drive the end of the bottom fold guide 421 to rotate relative to the folding bag space around the first direction Z. The bottom folding drive 422 includes a rotary motor with the axis of the rotary motor parallel to the first direction Z. The bottom fold guide 421 is disposed at the output end of the rotary motor. During the folding process of the packaging bag, the rotary motor drives the bottom fold guide 421 to rotate around the first direction Z, so that the hook of the bottom fold guide 421 extends into the folding bag space.

[0111] Of course, under the premise that the bottom folding drive member 422 drives the end of the bottom fold guide part 421 to rotate relative to the folding bag space around the first direction Z, the bottom folding drive member 422 and the bottom fold guide part 421 can also move along the transmission direction Y, so that the bottom fold guide part 421, which rotates into the folding bag space, can better act on the folds on the bottom surface of the packaging bag.

[0112] In other words, the bottom crease guide 421 can be precisely pushed against the bottom crease of the packaging bag by means of translation or rotation, or a combination of translation and rotation.

[0113] Furthermore, both the side crease guide component 410 and the bottom crease guide component 420 need to be positioned according to the width of the packaging bag. Therefore, as follows... Figure 7 As shown, the side crease guide component 410 and the bottom crease guide component 420 can be disposed on the adjusting component 300, for example, both can be integrated on the base 303 on the corresponding side, or the adjusting component can be disposed separately to adjust the spacing between the pair of side crease guide components 410 and the pair of bottom crease guide components 420 in the second direction X. This embodiment does not limit this to a single method.

[0114] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. In order to provide a deep understanding of this utility model, many specific details are included in the above description, and this utility model may also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0115] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0116] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0117] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0118] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0119] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A bag folding device, characterized in that, include: A folding bag assembly having a folding bag space and including at least one folding bag component located beside the folding bag space in a first direction; A limiting component, the limiting component including limiting parts located on both sides of the folded pocket space in a second direction; in An unfolded packaging bag enters the folding space from one end along the conveying direction. The limiting member abuts against the side of the packaging bag located within the folding space in the second direction. The folding member presses down on a corresponding side of the packaging bag along the first direction, causing the packaging bag to fold and exit from the other end of the folding space along the conveying direction. The first direction, the second direction, and the transmission direction are all perpendicular to each other.

2. The bag folding device as described in claim 1, characterized in that, The limiting component includes a pair of limiting members respectively disposed on both sides of the folding space in the second direction and extending along the transmission direction, the pair of limiting members respectively abutting against the corresponding side of the packaging bag located in the folding space.

3. The bag folding device as described in claim 2, characterized in that, Each of the aforementioned limiting components is integrally formed as a plate-like structure extending along the transmission direction; and Each of the limiting components has a clearance opening at its center in the first direction that extends along the transmission direction.

4. The bag folding device as described in claim 2, characterized in that, Each of the limiting components includes a limiting belt assembly, the limiting belt assembly including a plurality of limiting support shafts spaced apart along the transmission direction, and a plurality of limiting belts spaced apart and sleeved on the plurality of limiting support shafts in the first direction; wherein Each of the limiting components has a clearance opening extending along the transmission direction at its center in the first direction; and The bag folding device also includes a limiting transmission drive component. The output end of the limiting transmission drive component is connected to one of the multiple limiting support shafts. The limiting transmission drive component can drive the limiting support shaft and link the limiting belt with the packaging bag in the bag folding space to move synchronously along the transmission direction.

5. The bag folding device according to any one of claims 2 to 4, characterized in that, The bag folding device also includes a distance adjustment component, which is connected to a pair of limiting components and can move synchronously in the second direction in opposite directions or away from each other, adjusting the distance between the pair of limiting components in the second direction.

6. The bag folding device as described in claim 5, characterized in that, The bag folding device further includes an adjusting guide extending along the second direction, and a pair of limiting components are slidably disposed on the adjusting guide; and The pitch adjustment component includes a pitch adjustment drive and a pitch adjustment transmission component. The output end of the pitch adjustment drive is connected to the pitch adjustment transmission component, and the pitch adjustment transmission component is connected to a pair of the limiting components respectively. The pair of limiting components can move synchronously towards or away from each other along the pitch adjustment guide.

7. The bag folding device as described in claim 6, characterized in that, The adjustable guide includes an adjustable guide rail, and the end of each limiting component is slidably disposed on the adjustable guide rail; The pitch adjustment drive component is configured as a pitch adjustment drive motor, and the pitch adjustment transmission component includes a pitch adjustment screw located beside the pitch adjustment guide rail and extending along the second direction. The outer peripheral wall of the pitch adjustment screw is provided with two threaded segments spaced apart in the second direction. The two threaded segments have opposite directions of rotation and are respectively threadedly connected to the corresponding threaded holes of a pair of limiting components.

8. The bag folding device according to any one of claims 1 to 4, characterized in that, The folding bag assembly includes a pair of folding bag components respectively disposed on both sides of the folding bag space in the first direction. The pair of folding bag components move toward each other in the first direction and simultaneously press against a pair of front faces of the packaging bag located within the folding bag space.

9. The bag folding device as described in claim 8, characterized in that, Each of the folding bag components includes a folding bag belt assembly, the folding bag belt assembly including a folding bag belt extending along the transport direction and a plurality of folding bag support shafts spaced apart in the transport direction to support the folding bag belt; and The bag folding device further includes a bag folding drive component and a bag folding transmission belt assembly disposed at the output end of the bag folding drive component. The bag folding transmission belts of the bag folding transmission belt assembly are fixedly connected to the corresponding bag folding support shafts in a pair of bag folding belt assemblies on opposite sides, and move in conjunction with the movement of the pair of bag folding belt assemblies towards or away from each other along the first direction.

10. The bag folding device as described in claim 9, characterized in that, Each of the folding bag belt groups also includes a folding bag transmission drive unit, and each folding bag transmission drive unit is connected to a folding bag support shaft in the corresponding folding bag belt group, thereby driving the folding bag belt and the packaging bag in the folding bag space to move synchronously along the transmission direction.

11. The bag folding device as described in claim 3 or 4, characterized in that, The bag folding device further includes a pair of folding guide components spaced apart on both sides of the bag folding space in the second direction. The folding guide components are located on the corresponding side of the limiting portion away from the bag folding space. Each folding guide component has a guide portion that can move toward the bag folding space and pass through the clearance opening on the limiting component to abut against the crease on the packaging bag.

12. The bag folding device as described in claim 11, characterized in that, Each of the folding guide components includes a side crease guide component, the side crease guide component having a side crease guide portion for guiding the side of the packaging bag within the folding space to fold along the side crease.

13. The bag folding device as described in claim 11, characterized in that, At least one of the folding guide components further includes a bottom crease guide component, the bottom crease guide component having a bottom crease guide portion for guiding the bottom surface of the packaging bag within the folding space to fold along the bottom crease.

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