A reversing device, a packaging machine and a packaging method

Abstract

The application discloses a reversing device, a packaging machine and a packaging method, the reversing device comprises a conveying belt with a conveying surface, the conveying surface is sequentially divided into a preparation area, a reversing area and a merging area along the conveying direction of the conveying surface, and the conveying surface is provided with an input center line; the reversing assembly is arranged above the reversing area, the reversing assembly comprises first blocking heads, two first blocking heads are located on the two sides of the input center line, the lower end of the first blocking head can be extended into or withdrawn from the reversing area downward, and the extension direction of the preparation area is opposite to the first blocking head extended into the reversing area; the material merging assembly is arranged on the two sides of the conveying belt and surrounds a material merging channel, and the width of the material merging channel gradually reduces from the reversing area to the merging area, so that the material can be automatically reversed during the conveying process, meanwhile, the commodity code on the side of the material can be determined to be turned to the adjacent two materials, the waste of manpower is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment, and particularly to a reversing device, a packaging machine, and a packaging method. Background Technology

[0002] Some promotional online stores often package multiple packs of sanitary napkins into a single package and attach a total product code to the package for sale. However, each individual pack of sanitary napkins also has a product code on one side. During the packaging process, the packing staff needs to arrange each pack of sanitary napkins in a straight line beforehand, ensuring that the product code is facing between the two adjacent sanitary napkin packaging bags, before proceeding with subsequent loading and packaging. The loading and arranging process is inefficient, and the orientation of the sanitary napkins is also prone to errors, resulting in the product code of each individual pack facing the wrong direction. This can easily lead to misscanning during the subsequent loading and sales process. Summary of the Invention

[0003] The purpose of this invention is to provide a reversing device, a packaging machine, and a packaging method to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The solution to the technical problem of this invention is:

[0005] A reversing device includes: a conveyor belt having a conveying surface, the conveying surface being divided into a preparatory area, a reversing area, and a converging area along its conveying direction, the conveying surface having an input centerline; a reversing assembly disposed above the reversing area, the reversing assembly including a first stop, two first stops located on both sides of the input centerline, the lower ends of the first stops extending downward into or out of the reversing area, the extension direction of the preparatory area being directly opposite the first stops extending into the reversing area; and a material collection assembly, two material collection assemblies disposed on both sides of the conveyor belt and forming a material collection channel, the width of the material collection channel gradually decreasing from the reversing area to the converging area.

[0006] This technical solution has at least the following beneficial effects: During the material conveying process from the preparation area to the reversing area, the center of the material conveying trajectory and the input centerline of the conveying surface overlap each other. The two first stops can abut against the two sides of the material center respectively. According to the individual action of any one of the first stops, the material can achieve a forward or reverse horizontal conversion around the first stop under the friction of the conveyor belt. The converted material is arranged neatly along the gradually converging material channel and continuously conveyed along the conveying direction, which facilitates the realization of subsequent packaging processes. This invention can adjust the timing of the two first stops entering the reversing area according to the packaging quantity of the material, ensuring that the two first stops periodically and alternately enter the reversing area. This not only enables the material to automatically realize the reversal during the conveying process, but also ensures that the product code on the side of the material can be reliably turned to the two adjacent materials, reducing manpower waste, improving production efficiency, and preventing misscanning of combined products in subsequent upstream and sales processes.

[0007] As a further improvement to the above technical solution, a roller is fitted onto the lower end of the first stop, and the rotation axis of the roller extends vertically. The side of the material facing the conveying surface in the conveying direction can directly contact the roller. The roller, which rotates with the material, can reduce the friction during the material conversion process and improve the material conversion effect.

[0008] As another improvement to the above technical solution, the material collection assembly includes a partition and a pressing member. The partitions of two material collection assemblies form a material collection channel. The pressing member has a retractable connecting end, which connects to the side of the partition away from the material collection channel. Operators can adjust the connecting end according to the width and length of the material during the conveying process, thereby changing the width of the material collection channel. This ensures that the material collection channel provides horizontal conversion space for the material and matches the width of the downstream portion of the material collection section with the conveying width after material conversion. The neatly arranged material along the material collection section facilitates subsequent packaging processes. The adjustable-width material collection channel is suitable for packaging sanitary napkins of various sizes, improving applicability.

[0009] As another improvement to the above technical solution, the present invention further includes a second stop, a downstream splicing turning area of ​​the confluence zone, the second stop extending vertically into the turning area, and the extension direction of the confluence zone facing the second stop. Packaging materials are continuously conveyed from the confluence zone to the turning area. When the material comes into contact with the second stop, the distance between the second stop and the inner wall of one side of the confluence channel is approximately 1 / 3 of the width of the confluence channel. The material, under the friction of the conveyor belt, turns towards the side wall of the other confluence channel, allowing the material to turn 90° again, thereby adjusting the direction of the product code on the side wall of the material, facilitating subsequent packaging. The structure is simple and reliable.

[0010] The present invention also provides: a packaging machine, comprising a frame and the aforementioned reversing device, wherein the frame is provided with a stacking platform, a packing platform and a sealing platform arranged sequentially from back to front, comprising: a pushing component, which can push materials piled at the end of the conveying surface into the stacking platform; a bag feeding device, which can convey a single packaging bag to the packing platform; an opening device, which has an adsorption component, which can suck open the bag opening of the packaging bag located on the packing platform; a bag supporting device, which has an opening and retractable supporting end, the retracted supporting end can extend into the bag opening and open the packaging bag, the open supporting end forms a feeding port, the front and rear ends of the feeding port are respectively connected to the inner cavity of the packaging bag and the stacking platform; a pusher head, which can pass forward sequentially over the stacking platform, the packing platform and the sealing platform and return to its original position; and a sealing device, which can heat seal the bag opening located in the sealing platform.

[0011] This technical solution has at least the following beneficial effects: After horizontal conversion, the materials are stacked sequentially at the end of the conveyor surface along the conveyor belt's conveying direction. The pusher pushes the materials stacked in the same group onto the stacking platform. The bag feeding device feeds individual packaging bags onto the packaging platform one by one. The opening device includes an adsorption element that can suck open the bag opening on the packaging platform, so that the bag opening faces the pusher head. The bag supporting end of the bag supporting device extends into the bag opening and opens, making the bag opening larger to ensure that the material can enter. Moreover, the pusher head can move back and forth and pass over the stacking platform, packaging platform, and sealing platform in sequence. When the pusher head moves forward, it can push the material from the stacking platform into the packaging bag on the packaging platform. Then, the packaging bag is pushed away from the bag supporting end by the continuous forward thrust of the pusher head and moved forward to the sealing platform. The sealing device heat-seals the bag opening on the sealing platform, completing the packaging of the entire group of materials and improving the automation effect.

[0012] As a further improvement to the above technical solution, the sealing device includes a cutter, a pressing assembly, and side pullers arranged sequentially along the material conveying direction. There is a sealing gap between the packaging platform and the sealing platform. The sealing gap is flush with the surface of the sealing platform as a reference plane. The two side pullers are located on both sides of the sealing gap. The side pullers have clamping ends facing the reference plane. The clamping ends on the two side pullers can move closer to or further away from each other. The pressing assembly includes an upper pressing block and a lower pressing block located on the upper and lower sides of the reference plane, respectively. The upper pressing block and the lower pressing block can move closer to or further away from the reference plane at the same time. A heating wire is provided on the top surface of the lower pressing block. The heating wire is perpendicular to the material conveying direction. The frame is fitted with the reference plane and has a feeding groove. The cutter faces downwards and is directly opposite the opening of the feeding groove. After the packaging bag is pushed into the sealing platform by the pusher, the clamping end clamps and pulls open the two sides of the packaging bag near its opening to ensure that the bag opening is flat, reduce bag opening wrinkles, facilitate the pressing and heat sealing of the bag opening by the pressing component, prevent the pressing component from leaking or pressing the bag opening crookedly, and improve the stability of the sealing quality of the product packaging bag. At the same time, the part that protrudes beyond the heat seal and also protrudes beyond the sealing gap can be cut off by the cutter. The cut-off material falls into the feeding trough for collection, improving the sealing effect and efficiency of the bag opening.

[0013] As a further improvement to the above technical solution, the pressing assembly includes a driving component, a connecting rod, a pull rod a, and a pull rod b. The upper pressing block and the lower pressing block are slidably connected to the frame in the vertical direction. The driving component rotates and drives the middle part of the connecting rod, whose rotation axis extends in the horizontal direction. Pull rod a and pull rod b are rotatably connected to the front and rear ends of the connecting rod, respectively. The upper end of pull rod a is rotatably connected to the upper pressing block, and the upper end of pull rod b is rotatably connected to the lower pressing block. The driving component drives the middle part of the connecting rod to rotate and swing. When the front end of the connecting rod moves up or down, the rear end of the connecting rod moves down or up accordingly. The swinging connecting rod pulls pull rod a and pull rod b to move simultaneously, causing the upper and lower pressing blocks to slide closer or further away from the frame simultaneously. This improves the movement stability of the upper and lower pressing blocks while ensuring the stroke length. Simultaneous driving of the upper and lower pressing blocks can be achieved with a single driving component, reducing production costs.

[0014] The present invention also provides a packaging method applied to the above-mentioned packaging machine, comprising the following steps:

[0015] Step 1: The centerline of the material being conveyed along the conveyor surface coincides with the input centerline. The two first stops correspond to approximately 1 / 3 and 2 / 3 of the material width, respectively. The number of materials packaged together in each group is n. When the first or (n-1)th material in the same group enters the reversing zone along the preparation area, one first stop extends into the reversing zone, allowing the corresponding material to be reversed 90° towards the input centerline. When the second or nth material in the same group enters the reversing zone along the preparation area, the first stop rises, and the other first stop extends into the reversing zone, allowing the corresponding material to be reversed 90° towards the input centerline. Step 2: The converted materials gradually converge as the conveyor surface narrows along the material collection channel and are stacked sequentially along the conveying direction.

[0016] This technical solution has at least the following beneficial effects: The side of the first stop with the input centerline is the material-turning side. When the first stop extends into the reversing zone, because it approximately abuts against 1 / 3 of the material, about 2 / 3 of the material is located on the material-turning side of the first stop. Under the friction of the conveying surface, the portion of the material on the material-turning side overcomes the frictional resistance of the other side of the first stop, allowing the material to be turned along the first stop on the material-turning side. Simultaneously, the width of the material-collecting channel gradually decreases along the conveying direction. The turned material gradually arranges itself neatly along the material-collecting channel, facilitating subsequent packaging. Under the action of the first and second stops, the forward and reverse conversion of the material is automatically achieved, ensuring that the product codes on the side of the material can be reliably turned between two adjacent materials, reducing manpower waste and improving production efficiency.

[0017] As a further improvement to the above technical solution, the downstream splicing and turning area of ​​the confluence zone has the second stop extending into the turning area and facing the extension direction of the confluence zone, causing the material being conveyed to change 90°. In the same group of materials, the product codes of the first and last packages after being switched by the first and second stops are located on opposite sides. The second stop causes multiple materials to sequentially change at the same angle, ensuring that the group of materials are properly arranged before being bagged and packaged, thus concealing the product codes on each material.

[0018] As another improvement to the above technical solution, the present invention further includes the following steps: Step 3, the pusher pushes the material piled at the end of the conveying surface into the stacking platform; Step 4, the opening device opens the bag mouth of a single packaging bag located on the packaging platform, and the bag-supporting device drives the retracted bag-supporting end to extend forward into the bag mouth; Step 5, the bag-supporting end opens and expands the bag mouth, and the bag-supporting device drives the opened bag-supporting end to return to its original position, so that the packaging bag is always covered on the bag-supporting end; Step 6, the stack head pushes the material on the stacking platform into the packaging bag, and continues to push forward, so that the packaging bag is detached from the bag-supporting end and pushed into the sealing platform, and the packaging bag is sealed and output by the sealing device. The bag-supporting end moves back and forth and puts on the packaging bag, so that the inner cavity of the packaging bag and the feed port are connected. The pusher automatically pushes the material into the stacking platform. The material is located on the moving trajectory of the pusher head, so that when the pusher head moves forward, it can directly push the material into the packaging bag. Then, the packaging bag is pushed away from the bag-supporting end by the continuous pusher head and enters the sealing platform. Finally, the bag is directly output after the sealing device heat seals the bag opening. This ensures that the product code on the side of the packaged material can be hidden between two adjacent materials in the same group, improving automation and production efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of a commutation device provided in an embodiment of the present invention;

[0021] Figure 2 This is a structural diagram of a reversing device including a steering zone according to an embodiment of the present invention;

[0022] Figure 3 This is a top view of a packaging machine provided in an embodiment of the present invention;

[0023] Figure 4 This is a partial structural diagram of a packaging machine provided in an embodiment of the present invention, including a bag-supporting device and a pusher head;

[0024] Figure 5 This is a structural diagram of a sealing device provided in an embodiment of the present invention;

[0025] Figure 6 This is a structural diagram of a side pull member provided in an embodiment of the present invention.

[0026] In the attached diagram: 110-Conveyor belt, 111-Conveying surface, 112-Preparation area, 113-Reversing area, 114-Converging area, 120-First stop, 121-Roller, 131-Baffle, 132-Pressure piece, 133-Connecting rod, 210-Turnover area, 220-Second stop, 230-Pushing piece, 231-Push plate, 232-Baffle plate, 310-Frame, 311-Stacking platform, 312-Packing platform, 313-Bag sealing platform, 320-Push head, 330-Bag feeding device, 331-Input belt, 332-Pushing piece, 333-Bag taking assembly, 340 - Adsorption component, 350- Bag support device, 360- Sealing device, 361- Limiting plate, 362- Discharge conveyor belt, 410- Feed inlet, 420- Mounting plate, 430- Moving plate, 440- Fixed plate, 450- Adjusting component, 460- Pressure plate, 510- Cutter, 521- Upper pressure block, 522- Lower pressure block, 523- Heating wire, 530- Side pull component, 540- Sealing gap, 550- Discharge chute, 561- Pull rod a, 562- Pull rod b, 610- Motor, 620- Gripper cylinder, 630- Turntable, 640- Transmission rod a, 650- Transmission rod b. Detailed Implementation

[0027] The following will clearly and completely describe the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connection relationships mentioned herein do not simply refer to direct connection of components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in the present invention can be combined interactively without contradicting each other.

[0028] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0029] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0031] Reference Figure 1 The reversing device includes a conveyor belt 110, a reversing assembly, and a material collection assembly. The conveyor belt 110 has a continuously conveying surface 111. The conveying surface 111 is connected sequentially to a preparatory area 112, a reversing area 113, and a collection area 114 along the conveying direction from back to front. The conveying surface 111 has an input centerline, and the center of the material conveying trajectory coincides with the input centerline. The reversing assembly is located above the reversing area 113. The reversing assembly includes a first stop head 120 and a first cylinder. The first cylinder is fixed to the position of the conveyor belt 110. The first stop head 120 extends vertically, and the first cylinder can drive the first stop head 120 to move up and down, so that the lower end of the first stop head 120... The first stop 120 of the two reversing components can extend downward into or out of the reversing zone 113. The first stop 120 of the two reversing components is located on both sides of the input centerline. The two first stop 120 can periodically and alternately extend into the reversing zone 113. At the same time, the extension direction of the preparation zone 112 is directly opposite to the first stop 120 extending into the reversing zone 113, so that the packaging material output from the preparation zone 112 can abut against the first stop 120. There are two material collection components. The two material collection components are arranged on both sides of the conveyor belt 110 and form a material collection channel with each other. The material collection channel extends along the conveying direction of the conveyor belt 110, and the width of the material collection channel gradually decreases from the reversing zone 113 to the confluence zone 114.

[0032] It should be noted that the end of the material receiving channel near the reversing zone 113 is wider, providing space for material conversion. The width of the portion of the material receiving channel near the confluence zone 114 matches the conveying width of the converted material. The converted material is arranged neatly along the gradually narrowing material receiving channel and continuously conveyed in the conveying direction, facilitating subsequent packaging processes. Furthermore, the conveying width of the preparation zone 112 can also be close to the conveying width of the sanitary napkins, reducing sanitary napkin skew and ensuring that the sanitary napkins are properly abutted against the first stop 120.

[0033] In practical use, the center of the sanitary napkin conveying trajectory coincides with the input centerline, allowing the two first stop heads 120 to abut against each other on either side of the center of the sanitary napkin. When the sanitary napkin is conveyed to the reversing zone 113, one of the corresponding first stop heads 120 extends the sanitary napkin downwards into the reversing zone 113. This first stop head 120 abuts against the sanitary napkin at a position off the centerline. The first stop head 120 divides the sanitary napkin into two parts along the conveying direction. The part through which the sanitary napkin conveying trajectory passes has a larger contact area with the conveyor belt 110. Driven by the friction of the conveyor belt 110 and blocked by the first stop head 120, the larger portion of the sanitary napkin overcomes the friction of the smaller portion and continues to move along the conveyor belt 110, while the smaller portion is blocked and stopped by the first stop head 120, causing the sanitary napkin to... The first stop head 120 rotates horizontally by 90°. After the sanitary napkin completely passes the first stop head 120, it continues to be conveyed along the conveying surface 111. Since the two first stop heads 120 are respectively facing the two sides of the center line of the sanitary napkin, when switching to the other first stop head 120 to block the movement of the sanitary napkin, the corresponding sanitary napkin rotates horizontally in the opposite direction by 90°. This invention can adjust the timing of the two first stop heads 120 extending into the reversing area 113 according to the number of materials packaged, ensuring that the two first stop heads 120 periodically and alternately extend into the reversing area 113. This not only enables the materials to automatically reverse direction during the conveying process, but also ensures that the product codes on the side of the materials can be reliably turned to the two adjacent materials, reducing manpower waste, improving production efficiency, and preventing misscanning of combined products in subsequent upstream and sales processes.

[0034] Furthermore, in this embodiment, the first stop 120 is in the form of a vertically extending rod. In practice, the first stop 120 could also be plate-shaped, as long as it can cover the smaller portion of the sanitary napkin after it has been divided, ensuring that the larger portion can always be conveyed along the conveying surface 111. Additionally, the material can be not only packaged sanitary napkins but also other cuboid products.

[0035] In order to ensure that the material can be smoothly turned under the action of the first stop 120, a roller 121 is fitted at the lower end of the first stop 120, and the rotation axis of the roller 121 extends vertically.

[0036] Specifically, the side of the material facing the conveying surface 111 in the conveying direction can directly contact the roller 121. The roller 121, which rotates with the material, can reduce the friction during the material conversion process and improve the material conversion effect.

[0037] In this embodiment, the roller 121 can be a bearing structure, which is stable and smooth to use, or it can be a swivel ring fitted at the bottom of the first stop 120, which is low in cost.

[0038] Furthermore, the material collection assembly includes a partition 131 and a pressing member 132. The partitions 131 of the two material collection assemblies form a material collection channel. The pressing member 132 has a retractable connecting end, which connects to the side of the partition 131 away from the material collection channel.

[0039] Specifically, staff can adjust the connecting end of the pressure piece 132 according to the width and length of the material during the conveying process, thereby changing the width of the material collection channel. This ensures that the material collection channel provides horizontal conversion space for the material and matches the width of the downstream section of the material collection section with the conveying width after material conversion. The neatly arranged material along the material collection section facilitates subsequent packaging processes. The adjustable width material collection channel is suitable for packaging sanitary napkins of various sizes, improving applicability.

[0040] In fact, the pressure member 132 includes a fixed seat and a connecting rod 133. The connecting rod 133 is connected to one end of the side wall of the partition 131 as the connecting end. The connecting rod 133 can slide back and forth along the fixed seat and be fixed by bolts, thereby realizing the expansion and contraction of the connecting end relative to the pressure member 132.

[0041] Furthermore, the pressing component 132 can move back and forth and be positioned along the conveying direction of the conveying surface 111. This allows for convenient adjustment of the width of the material receiving channel. In this embodiment, the conveyor belt 110 is mounted on the frame 310, and the fixing seat of the pressing component 132 is slidably connected to the frame 310 along the conveying direction of the conveying surface 111, and can be positioned on the frame 310 by screws or other fasteners.

[0042] Reference Figure 2 In order to accommodate materials with different feeding directions and ensure that the product codes on the materials can be adjusted to the appropriate position, in this embodiment, the present invention also includes a second stop head 220, a downstream splicing turning area 210 of the confluence area 114, the second stop head 220 extending vertically into the turning area 210, and the extension direction of the confluence area 114 being directly opposite the second stop head 220.

[0043] Specifically, the packaging material is continuously conveyed from the confluence area 114 to the turning area 210. When the material comes into contact with the second stop 220, the distance between the second stop 220 and the inner wall of one side of the confluence channel is about 1 / 3 of the width of the confluence channel. Under the friction of the conveyor belt 110, the material is turned towards the side wall of the other side of the confluence channel, so that the material can be turned 90° again, thereby adjusting the direction of the product code on the side wall of the material, which is convenient for subsequent packaging. The structure is simple and reliable.

[0044] It should be noted that the second stop 220 can be a vertically extending rod, in which case the distance between the rod and the inner wall of the feeding channel is approximately 2cm to 4cm. Alternatively, the second stop 220 can be plate-shaped, and the second stop 220 can not exceed 1 / 3 of the width of the feeding channel, ensuring the reversal of the sanitary napkin.

[0045] Reference Figure 3 The present invention also provides a packaging machine, which includes a frame 310 and the aforementioned reversing device. The frame 310 is provided with a stacking platform 311, a packing platform 312 and a sealing platform 313 arranged sequentially from back to front. It also includes a pusher 230, a bag infeed device 330, an opening device, a bag support device 350, a pusher head 320 and a sealing device 360.

[0046] The pusher component 230 includes a cylinder and a pusher plate 231. The cylinder drives the pusher plate 231 to move left and right, causing it to push the material accumulated at the end of the conveying surface 111 onto the stacking platform 311. A baffle plate 232, bent at 90° to the pusher plate 231, is connected to the side of the pusher plate 231 near the confluence area 114. The end face of the baffle plate 232 faces the material on the conveying surface 111. When the pusher plate 231 pushes the material, the baffle plate 232 can prevent the material from continuing to move along the conveying surface 111, thus preventing the material from falling off.

[0047] Furthermore, the bag feeding device 330 includes a conveying assembly and a bag picking assembly 333. The conveying assembly includes an input belt 331 that continuously conveys from back to front. Multiple pry bars 332 are spaced apart on the surface of the input belt 331 along its conveying direction. The two adjacent pry bars 332 at the foremost end form an upper bag area. Each upper bag area has stacked packaging bags. The bag picking assembly 333 has a suction end located above the upper bag area. The bag picking device can drive the suction end to move back and forth between the foremost upper bag area and the packaging platform 312, allowing the suction end to pick up a single packaging bag and convey it to the packaging platform 312, thus achieving automatic bag feeding. In practice, the bag picking device can use a cylinder to drive the suction end to move up and down and horizontally back and forth. The opening device in this application includes an adsorption member 340, which can open the opening of a packaging bag located on a packaging platform 312. The adsorption member 340 includes an upper adsorption member and a lower adsorption member, with the adsorption openings of the upper and lower adsorption members directly opposite each other. The upper adsorption member can move downwards so that its adsorption opening is flush with the height of the packaging platform 312, and the adsorption opening of the lower adsorption member is also flush with the height of the packaging platform 312. Furthermore, to reduce the static electricity effect of the packaging bag, the invention also includes a baffle rod extending forward from above the upper bag area at the foremost point to the lower end of the lower adsorption member. The baffle rod restricts the packaging bag to the lower front of the upper adsorption opening, reducing the likelihood of the packaging bag tilting or bending, ensuring that the upper adsorption member can directly press the packaging bag shut after moving downwards, and ensuring that the upper and lower adsorption members are aligned with the packaging bag.

[0048] When in use, the suction bag end conveys a single packaging bag to the packaging platform 312. Then, the upper suction component moves down, and the suction ports of the upper and lower suction components open and fit against the upper and lower sides of the bag body. When the two suction ports simultaneously suck up the upper and lower sides of the bag body, the upper suction component moves up, which can open the bag mouth and ensure that subsequent packaging processes can be carried out.

[0049] Reference Figure 4 In order to ensure that the material can be fed into the inner cavity of the packaging bag, the bag-supporting device 350 can be moved back and forth by a cylinder and has a bag-supporting end that can be opened and retracted. The retracted bag-supporting end can extend into the bag opening and open the packaging bag. The open bag-supporting end forms a feeding port 410. The front and rear ends of the feeding port 410 are respectively connected to the inner cavity of the packaging bag and the stacking platform 311.

[0050] In some specific embodiments, the bag-supporting device 350 includes a mounting plate 420, a moving plate 430, a fixed plate 440, and an adjusting component 450. The mounting plate 420 is mounted on the frame 310, and the front end face of the mounting plate 420 is provided with a through hole. The fixed plate 440 is fixed to the mounting plate 420. The two moving plates 430 on the left and right sides and the two fixed plates 440 on the front and rear sides form a feed inlet 410 around the through hole. The two adjusting components 450 are respectively located on the side of the two moving plates 430 away from the feed inlet 410 and on the left side of the mounting plate 420. The adjusting component 450 includes an opening and closing cylinder and a transmission component. One end of the opening and closing cylinder is rotatably connected to the mounting plate 420, and the transmission component is hinged to the mounting plate 420. The rotation axis of the opening and closing cylinder and the rotation axis of the transmission component both extend in the vertical direction. One end of the transmission component is rotatably connected to the extension end of the opening and closing cylinder, and the other end of the transmission component is synchronously connected to the moving plate 430. Two movable plates 430 are spaced apart horizontally, and two fixed plates 440 are spaced apart vertically. The two movable plates 430 and the two fixed plates 440 form the feed inlet 410. When the extension and retraction end of the opening and closing cylinder extends or retracts, it drives the transmission component to rotate along the mounting plate 420, causing the movable plates 430 to rotate with the transmission component. This allows the front ends of the two movable plates 430 to open and close, thereby opening the bag opening and facilitating the subsequent insertion of the bagged sanitary napkins. The transmission component and the opening and closing cylinder are both located on the side of the movable plates 430 away from the feed inlet 410, and are both connected to the left end face of the mounting plate 420. This prevents the adjusting component 450 from obstructing the pusher head 320 and the bagged sanitary napkins, and also allows for the avoidance of the pushing component and the drive component of the pusher head 320, reducing interference and ensuring a reliable structure.

[0051] The pusher head 320 can move forward sequentially over the stacking platform 311, the packaging platform 312, and the sealing platform 313, and then return to its original position. The pusher head 320 is equipped with a rack and pinion mechanism. The pusher head 320 can be driven by a rotating motor 610, with a toothed belt fitted onto the gear. The rack and pinion mesh with the toothed belt, thus enabling the pusher head 320 to move back and forth, ensuring sufficient stroke length.

[0052] In addition, the present invention also includes a pressure plate 460, which can be moved down to a position flush with the upper side of the feed inlet 410 or moved up to reset. Before the pusher head 320 pushes the material, the pressure plate 460 moves down and flattens the top surface of the material, ensuring that the material can be smoothly pushed into the feed inlet 410 by the pusher head 320, reducing the phenomenon of material being damaged due to being stuck at the feed inlet 410, and also reducing downtime for adjustment and improving work efficiency.

[0053] The sealing device 360 ​​can heat seal the bag opening located within the sealing platform 313 to achieve packaging.

[0054] In actual use, after horizontal conversion, the materials are sequentially piled up at the end of the conveyor surface 111 along the conveying direction of the conveyor belt 110. The pusher 230 pushes the materials piled up in the same group onto the stacking platform 311. The pressure plate 460 moves down and presses the top surface of the materials together. The suction end of the bag feeding device 330 feeds individual packaging bags one by one onto the packaging platform 312 and lays them flat. The opening device includes an suction element 340, which includes an upper suction element and a lower suction element. The upper suction element and the lower suction element respectively suction the upper and lower sides of the packaging bag. When the upper suction element moves upward, the packaging bag located on the packaging platform 312 can be opened. The packaging bag opening is sucked open, so that the bag opening faces backward and directly towards the pusher 320. The bag-supporting end of the bag-supporting device 350 extends into the bag opening and opens, making the bag opening larger to ensure that the material can enter. When the pusher 320 moves forward, it can push the material from the stacking platform 311 into the packaging bag on the packaging platform 312. Then, under the pushing force of the pusher 320 moving forward, the packaging bag detaches from the bag-supporting end and moves forward to the sealing platform 313. The sealing device 360 ​​heat seals the bag opening located on the sealing platform 313, completing the packaging of the entire group of materials and improving the automation effect.

[0055] Reference Figure 5In some specific embodiments, the sealing device 360 ​​includes a cutter 510, a pressing assembly, and side pullers 530 arranged sequentially along the material conveying direction. A sealing gap 540 exists between the packaging platform 312 and the sealing platform 313. The sealing gap 540 is flush with the surface of the sealing platform 313 as a reference plane. Two side pullers 530 are located on both sides of the sealing gap 540. Each side puller 530 has a clamping end facing the reference plane. The clamping ends on 530 can move closer to or further away from each other. The pressing assembly includes an upper pressing block 521 and a lower pressing block 522 located on the upper and lower sides of the reference surface, respectively. The upper pressing block 521 and the lower pressing block 522 can move closer to or further away from the reference surface at the same time. A heating wire 523 is provided on the top surface of the lower pressing block 522. The heating wire 523 is perpendicular to the material conveying direction. The frame 310 is provided with a feeding groove 550 attached to the reference surface. The cutter 510 faces downward and is directly opposite the opening of the feeding groove 550.

[0056] Specifically, after the packaging bag is pushed into the sealing platform 313 by the pusher head 320, the clamping end clamps and pulls open the two sides of the packaging bag near its opening to ensure that the bag opening is flat, reduce bag opening wrinkles, facilitate the pressing component to press and heat seal the bag opening, prevent the pressing component from leaking or pressing the bag opening, and improve the stability of the sealing quality of the product packaging bag. At the same time, the part that protrudes beyond the heat seal and also protrudes beyond the sealing gap 540 can be cut off by the cutter 510. The cut-off material falls into the feeding trough 550 for collection. The method of pulling first, then pressing, and then cutting improves the sealing effect and efficiency of the bag opening.

[0057] Furthermore, in this embodiment, the cutter 510, pressing assembly, and side puller 530 are arranged sequentially from back to front, and the bag opening faces backward, so that the pusher 320 can seal the bag as soon as it is pushed into place, improving production efficiency and space utilization. In addition, the lengths of the upper pressure block 521, lower pressure block 522, and heating wire 523 are all greater than the conveying width of the bag, ensuring a tight seal at the bag opening.

[0058] Furthermore, the side pull member 530 may include a motor 610, a gripper cylinder 620, a turntable 630, a transmission rod a640, and a transmission rod b650. The motor 610 is rotatably connected to the turntable 630, and the rotation axis of the turntable 630 extends vertically. The two gripper cylinders 620 are located on the left and right sides of the turntable 630, respectively, and are slidably connected to the frame 310 in the left and right directions. One end of the transmission rod a640 is connected to one side of the turntable 630, and the other end of the transmission rod a640 is connected to one of the gripper cylinders 620. The transmission rod b650... One end of the shaft of the 0 is connected to the other side of the turntable 630, and the other end of the shaft of the transmission rod b650 is connected to another gripper cylinder 620. The gripping parts of the two gripper cylinders 620 are the gripping ends, and the two gripping ends are directly opposite each other. When the motor 610 drives the turntable 630 to rotate, the transmission rod a640 and the transmission rod b650 simultaneously pull the two gripper cylinders 620 closer to each other, or simultaneously push the two gripper cylinders 620 away from each other. The upper pressure block 521 and the lower pressure block 522 can be driven simultaneously by a single driving component, reducing production costs.

[0059] In addition, the side pull member 530 can also be driven to move its clamping end left and right by two lead screw motors 610 or two cylinders respectively. This embodiment does not impose specific limitations on this.

[0060] Furthermore, the pressing assembly includes a driving component, a connecting rod, a pull rod a561, and a pull rod b562. The material conveying direction extends forward and backward. The upper pressing block 521 and the lower pressing block 522 are both slidably connected to the frame 310 in the up and down direction. The driving component rotates to drive the middle part of the connecting rod. The rotation axis of the connecting rod extends in the left and right direction. The pull rod a561 and the pull rod b562 are respectively rotatably connected to the front and rear ends of the connecting rod. The upper end of the pull rod a561 is rotatably connected to the upper pressing block 521, and the upper end of the pull rod b562 is rotatably connected to the lower pressing block 522.

[0061] Specifically, the driving component is a motor 610, and the connecting rod is actually rotatably connected to the frame 310, improving the installation stability of the connecting rod. The driving component drives the middle part of the connecting rod to rotate and swing. When the front end of the connecting rod moves up or down, the rear end of the connecting rod moves down or up accordingly. The swinging connecting rod pulls the tie rods a561 and b562 to move simultaneously, so that the upper pressure block 521 and the lower pressure block 522 slide closer or further away along the frame 310 at the same time, improving the movement stability of the upper pressure block 521 and the lower pressure block 522, while ensuring the stroke length. The upper pressure block 521 and the lower pressure block 522 can be driven simultaneously by a single driving component, reducing production costs.

[0062] It should be noted that in this embodiment, the frame 310 is provided with a rotating shaft extending left and right, and both ends of the rotating shaft are connected to connecting rods, so that the two ends of the upper pressure block 521 are respectively connected to two tie rods a561, and the two ends of the lower pressure block 522 are respectively connected to two tie rods b562. This improves the uniformity of force and the stability of movement of the upper pressure block 521 and the lower pressure block 522, and reduces jamming and misalignment. In addition, the sliding connection structure between the upper pressure block 521, the lower pressure block 522 and the frame 310 or even other parts can be achieved by means of slide rail sliders or slide rail pulleys.

[0063] In this embodiment, the sealing device 360 ​​further includes a discharge conveyor belt 362 and a vertically movable limiting plate 361. The sealing platform 313 is located on the discharge conveyor belt 362, and the limiting plate 361 is located above the discharge conveyor belt 362. When the limiting plate 361 moves downward, it surrounds the sealing platform 313 to form a limiting cavity with the opening facing backward. The pusher head 320 can extend into the limiting cavity.

[0064] The pusher 320 pushes the packaged sanitary napkins into the sealing platform 313. The limiting plate 361 restricts the movement of the packaged bag on the discharge conveyor belt 362, keeping the packaged bag in position for easy sealing. After the packaged bag is heat-sealed and cut by the cutter 510, the clamping end of the side puller 530, the upper pressure block 521 and the lower pressure block 522, and the cutter 510 are all reset. At the same time, the limiting plate 361 moves upward, allowing the packaged bag to be automatically unloaded through the discharge conveyor belt 362, improving automation and ensuring production efficiency.

[0065] Furthermore, the present invention also provides a packaging method applied to the aforementioned packaging machine, comprising the following steps:

[0066] Preparatory steps: Adjust the extension length of the connecting section relative to the pressure member 132 according to the width of the material input, thereby adjusting the width of the material confluence channel and reducing the slope;

[0067] Step 1: When the material is conveyed along the conveyor surface 111, the centerline coincides with the input centerline. The two first stop heads 120 correspond to approximately 1 / 3 and 2 / 3 of the material width, respectively. The number of materials packaged together in each group is n. When the first or (n-1)th material in the same group is detected to enter the reversing zone 113 along the preparation zone 112, one first stop head 120 extends into the reversing zone 113, so that the corresponding material can be reversed 90° towards the input centerline. When the second or nth material in the same group enters the reversing zone 113 along the preparation zone 112, the first stop head 120 rises, and the other first stop head 120 extends into the reversing zone 113, so that the corresponding material can be reversed 90° towards the input centerline.

[0068] Step 2: The converted materials gradually converge along the narrowing of the material collection channel as the conveyor surface 111 shrinks, and are piled up sequentially along the conveying direction;

[0069] If the product code on the material is always on the two exposed sides of the material in the same group of stacked materials, rather than hidden between two adjacent materials, the downstream splicing turning area 210 of the confluence area 114, the second stop 220 extends into the turning area 210 and faces the extension direction of the confluence area 114, so that the material being conveyed changes 90°.

[0070] Step 3: After the material in the same group has been detected to be stacked up, the pressure plate 460 moves down and presses the top surface of the material to be flush with the top side of the feed inlet 410. The pusher 230 pushes the material stacked at the end of the conveying surface 111 into the stacking platform 311.

[0071] Step 4: The opening device opens the bag opening of the single packaging bag located on the packaging platform 312, and the bag-supporting device 350 drives the retracted bag-supporting end to extend forward into the bag opening.

[0072] Step 5: The bag-supporting end opens and expands the bag opening described in Step 4. The bag-supporting device 350 drives the opened bag-supporting end to return to its original position, so that the packaging bag is always covered on the bag-supporting end.

[0073] Step 6: The limiting plate 361 moves down, and the stack head moves forward to push the material on the stacking platform 311 into the packaging bag in step 5, and continues to push forward, so that the packaging bag is separated from the bag support end and pushed into the sealing platform 313 on the discharge conveyor belt 362. The limiting plate 361 restricts the movement of the material.

[0074] Step 7: The two clamping ends clamp and pull open the packaging bag on both sides near its opening. The upper pressure block 521 and the lower pressure block 522 approach each other and clamp onto the packaging bag. The heating wire 523 heats and melts the bag opening. The cutter 510 cuts off the part of the packaging bag that extends backward beyond the sealing gap 540. The cut-off material falls into the feeding trough 550 for collection.

[0075] Step 8: After the clamping end, upper pressure block 521 and lower pressure block 522 release the pressure on the packaging bag, the limiting plate 361 moves upward and the heat-sealed packaging bag is output with the discharge conveyor belt 362.

[0076] Specifically, the side of the first stop 120 with the input centerline is the turning side. When the first stop 120 extends into the reversing zone 113, because the first stop 120 approximately abuts against 1 / 3 of the material, about 2 / 3 of the material is located on the turning side of the first stop 120. Under the friction of the conveying surface 111, the portion of the material on the turning side overcomes the frictional resistance of the other side of the first stop 120, causing the material to be converted along the first stop 120 on the turning side. At the same time, the width of the material converging channel gradually decreases along the conveying direction, and the converted material gradually arranges itself neatly along the material converging channel along the conveying direction, facilitating subsequent packaging. The first stop 120 and the second stop 120... Under the action of 20, the forward and reverse conversion of materials is automatically realized, ensuring that the product code on the side of the material can be turned to the two adjacent materials with certainty. The bag support end moves back and forth and puts on the packaging bag, so that the inner cavity of the packaging bag and the feed port 410 are connected to each other. The pusher 230 automatically pushes the material into the stacking platform 311. The material is located on the moving trajectory of the pusher 320, so that when the pusher 320 moves forward, it can directly push the material into the packaging bag. Then, the packaging bag is detached from the bag support end under the continuous push of the pusher 320 and enters the sealing platform 313. Finally, the bag is directly output after the sealing device 360 ​​heat seals the bag mouth, which improves the automation effect, reduces manpower waste, and improves production efficiency.

[0077] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A commutation device, characterized in that: include: A conveyor belt (110) has a conveying surface (111) which is divided into a preparatory area (112), a reversing area (113) and a confluence area (114) along its conveying direction. The conveying surface (111) has an input centerline. A reversing assembly is disposed above the reversing zone (113). The reversing assembly includes a first stop (120). Two first stops (120) are located on both sides of the input centerline. The lower ends of the first stops (120) extend downward into or out of the reversing zone (113). The extension direction of the preparatory zone (112) is directly opposite to the first stops (120) extending into the reversing zone (113). Material collection components, two of which are arranged on both sides of the conveyor belt (110) and form a material collection channel, the width of which gradually decreases from the reversing area (113) to the confluence area (114); The material collection assembly includes a partition (131) and a pressure member (132). The partitions (131) of the two material collection assemblies form a material collection channel. The pressure member (132) has a retractable connecting end, which connects to the side of the partition (131) away from the material collection channel. It also includes a second stop (220), which is a downstream splicing turning area (210) of the confluence area (114). The second stop (220) extends vertically into the turning area (210), and the extension direction of the confluence area (114) is directly opposite to the second stop (220). In the materials stacked in the same group, the product code on the material is always on the two exposed sides, rather than hidden between two adjacent materials. The downstream splicing turning area (210) of the confluence area (114) has a second stop (220) extending into the turning area (210) and facing the extension direction of the confluence area (114), so that the material being conveyed changes 90°.

2. The commutation device according to claim 1, characterized in that: The lower end of the first stop (120) is fitted with a roller (121), and the rotation axis of the roller (121) extends vertically.

3. A packaging machine, comprising a frame (310) and a reversing device as described in any one of claims 1 to 2, wherein the frame (310) is provided with a stacking platform (311), a packing platform (312), and a sealing platform (313) arranged sequentially from back to front, characterized in that: include: Pusher (230) pushes the material piled up at the end of the conveyor surface (111) into the stacking platform (311). A bag feeding device (330) conveys individual packaging bags onto the packing platform (312); An opening device having an adsorption element (340) that sucks open the opening of a packaging bag located on the packaging platform (312); The bag-supporting device (350) has an opening and retractable bag-supporting end. The retracted bag-supporting end extends into the bag opening and opens the packaging bag. The open bag-supporting end forms a feed inlet (410). The front and rear ends of the feed inlet (410) are respectively connected to the inner cavity of the packaging bag and the stacking platform (311). The pusher (320) moves forward sequentially over the stacking platform (311), the packing platform (312), and the sealing platform (313) and then returns to its original position. A sealing device (360) heat seals the bag opening located within the sealing platform (313).

4. A packaging machine according to claim 3, characterized in that: The sealing device (360) includes a cutter (510), a pressing assembly, and side pullers (530) arranged sequentially along the material conveying direction. A sealing gap (540) exists between the packaging platform (312) and the sealing platform (313). The sealing gap (540) is flush with the surface of the sealing platform (313) as a reference plane. Two side pullers (530) are located on either side of the sealing gap (540). Each side puller (530) has a clamping end facing the reference plane. The two side pullers (530) have… The clamping ends can move closer to or further away from each other. The pressing assembly includes an upper pressing block (521) and a lower pressing block (522) located on the upper and lower sides of the reference surface, respectively. The upper pressing block (521) and the lower pressing block (522) can move closer to or further away from the reference surface at the same time. A heating wire (523) is provided on the top surface of the lower pressing block (522). The heating wire (523) is perpendicular to the material conveying direction. The frame (310) is fitted with the reference surface and has a feeding groove (550). The cutter (510) faces downward and is directly opposite the opening of the feeding groove (550).

5. A packaging machine according to claim 4, characterized in that: The pressing assembly includes a driving component, a connecting rod, a pull rod a (561) and a pull rod b (562). The upper pressing block (521) and the lower pressing block (522) are slidably connected to the frame (310) in the vertical direction. The driving component rotates to drive the middle part of the connecting rod. The rotation axis of the connecting rod extends in the horizontal direction. The pull rod a (561) and the pull rod b (562) are respectively rotatably connected to the front and rear ends of the connecting rod. The upper end of the pull rod a (561) is rotatably connected to the upper pressing block (521), and the upper end of the pull rod b (562) is rotatably connected to the lower pressing block (522).

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