Handle folding device for shopping bags

Abstract

The utility model discloses a handle folding device of shopping bag, including frame, push folding plate mechanism, lifting platform mechanism, still be equipped with telescopic template on the lifting platform mechanism, still be equipped with the lower folding mechanism above push folding plate mechanism, lower folding mechanism including bracket, left folding plate, right folding plate, driving part, left folding plate and right folding plate are connected on horizontal driving part respectively, left folding plate and right folding plate with the left and right sides of telescopic template correspond, still be equipped with the pressing plate above between left folding plate and right folding plate, still be connected with the translation assembly and lifting assembly on the bracket. The utility model integrates the rear pressing plate, pressing plate mechanism, pressure folding mechanism of prior art into a simple lower folding mechanism, so that the whole machine structure is simple and compact, the lower folding mechanism of the utility model does not affect the normal conveying work of mechanical hand structure, and the folding speed is fast and the efficiency is high.

Description

Technical Field

[0001] This utility model relates to a folding handle device for shopping bags. Background Technology

[0002] The shopping bag described in this utility model is a plastic shopping bag with two handles, also known as a convenience bag, vest bag, etc. For ease of sale and use, shopping bags produced by bag-making machines need to be folded before being tied. When folding the shopping bag, the two handles must first be folded; this device for folding the handles is called a shopping bag handle folding device.

[0003] Utility model patent CN221341464U discloses a packaging bag handle folding mechanism and packaging bag folding device, which includes a first support member (equivalent to a left push plate), a second support member (equivalent to a right push plate), and a driving member (equivalent to a push plate driving mechanism). The technical problem this utility model solves is that, driven by the driving member, the first and second support members respectively push and fold the two handles of the shopping bag towards the center from both sides of a telescopic plate (telescopic template). The problem is that when the shopping bag is thick and its drooping range due to its own weight is small, the first and second support members cannot push and fold the handles of the shopping bag effectively, resulting in unstable handle folding operation.

[0004] The patent for authorization publication number CN218054259U discloses a utility model patent for a folding device of a plastic bag folding machine, which includes a frame, a folding plate mechanism, a template mechanism, a pressure plate mechanism, and a lifting platform. The template mechanism includes a trapezoidal template and a telescopic component, which is set below the lifting platform. A folding mechanism is also provided above the trapezoidal template. This utility model solves the problem of small handle drooping range by pressing the two handles of the plastic bag downwards at the two inclined sides of the trapezoidal template with pressure rods. However, this utility model brings other problems in its structure: First, the structure is complex. After the plastic bag is conveyed by the bag transfer robot and placed on the lifting platform, there is a rear pressure plate above the corresponding lifting platform. If there is no right pressure plate to press and fix the bag body to the lifting platform, the plastic bag will easily move when the push-folding plate mechanism pushes the two handles, making it impossible to push the handles. When the pressure rod presses down, a cylinder is also required as a driving mechanism. After the push-folding plate mechanism pushes the two handles, a pressure plate mechanism is also required to fix the folded two handles to the push-folding plate. This requires three up and down driving mechanisms to implement. Secondly, after the bag-transferring robot places the plastic bag onto the lifting platform, the cylinder that drives the pressure bar downward, the driving mechanism of the pressure plate, and the driving mechanism that drives the pressure plate downward are all located above the lifting platform mechanism. The part above the lifting platform affects the passage of the bag-transferring robot. It must wait for the bag-transferring robot to put down the shopping bag and return before it can move down to perform the fixing and folding work. Otherwise, the robot cannot return in time, which greatly affects the folding speed and reduces work efficiency. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to design a downward folding mechanism for the folding of the handle of a shopping bag by improving the existing technology, and to provide a handle folding device for a shopping bag folding machine.

[0006] To achieve the above technical objectives, the technical solution of this utility model is: a folding device for the handle of a shopping bag, comprising a frame, a folding plate mechanism, and a lifting platform mechanism, wherein the lifting platform mechanism is further provided with a telescopic template. The device is characterized in that: a downward folding mechanism is provided above the folding plate mechanism, the downward folding mechanism comprising a bracket, a left folding plate, a right folding plate, and a transverse drive component. The left and right folding plates are respectively connected to the drive component, the transverse drive component is disposed on the bracket, the left and right folding plates correspond to the left and right sides of the telescopic template, a pressure plate is provided above the left and right folding plates, and a translation component and a lifting component are connected to the bracket.

[0007] As a preferred technical solution, the left and right folding plates are respectively connected to folding plate sliders, and the bracket is also provided with folding plate guide rails. The left and right folding plates are slidably mounted on the folding plate guide rails via the folding plate sliders.

[0008] This design, because the folding plate guide rail and folding plate slider have a guiding function, allows the left and right folding plates to move without shaking under the guidance of the folding plate guide rail, resulting in high precision. When using electric slides, electric cylinders, etc., as lateral drive components, they contain internal guide mechanisms that can guide the linear movement of the left or right folding plates, so there is no need to set up folding plate guide rails and folding plate sliders.

[0009] The left and right folding plates are used to press down on the two handles of the shopping bag from the left and right sides of the telescopic template, respectively.

[0010] The aforementioned lateral drive component is used to drive the left and right folding plates to move left and right in the lateral direction. There are many specific implementations of the lateral drive component, such as belt transmission mechanism driven by motor, gear and rack mechanism, ball screw mechanism, electric slide table, etc.

[0011] As a preferred technical solution, the lateral drive component includes a folding plate motor, two folding plate pulleys, and a folding plate belt. The folding plate belt is tensioned and installed on the two folding plate pulleys, and the folding plate motor is connected to one of the folding plate pulleys.

[0012] The pressure plate is used to fix the shopping bag body onto the lifting platform, and further fix the handle part of the folded shopping bag to the folding plate mechanism. The pressure plate can be connected to the bracket or to the folding plate guide rail.

[0013] As a preferred technical solution, the pressure plate is connected to the bracket of the folding mechanism.

[0014] The bracket can be a plate, a tray, or an L-shaped connector, used to support the left and right folding plates, as well as the connection between the pressure plate and the lifting assembly. Driven by the lifting mechanism, it supports the downward folding mechanism and the pressure plate's vertical movement. As a preferred embodiment, the bracket is a tray with downward-bent edges on the left, right, and front sides. Its upper surface is a flat plane, similar to a panel, allowing shopping bags to pass through easily. The downward bending on three sides strengthens the bracket and facilitates connection with the lifting assembly.

[0015] As a preferred technical solution, the folding mechanism is connected to the lifting assembly, which in turn is connected to the translation assembly, which is mounted on the frame. This design ensures that the lifting assembly and translation assembly do not appear above the folding mechanism but are positioned on either side of the bracket. Although the folding mechanism is slightly higher than the raised lifting platform, the degree of elevation does not impede the normal passage of the bag-transfer robot.

[0016] The translation component is used to drive the downward folding mechanism to reciprocate in the front-back direction. There are many specific implementations of the translation component, such as linear modules, electric slides, cylinders, etc., and multiple implementations are available.

[0017] As a preferred technical solution, the translation assembly includes two translation guide rails, two connecting plates, and a belt drive mechanism. Each of the two translation guide rails has a translation slider, and the guide rails are respectively disposed on both sides of the frame. The two connecting plates are respectively connected to the translation sliders and are connected to the belt drive mechanism. As a further improvement, the belt drive mechanism includes a translation motor, a drive shaft, and four translation pulleys. The translation motor is connected to the drive shaft, and two translation pulleys are fixedly mounted on the drive shaft and rotatably mounted on both sides of the frame. The two translation pulleys fixedly mounted on the drive shaft correspond to the two translation pulleys rotatably mounted on the frame, and translation belts are respectively disposed on the corresponding translation pulleys. The two connecting plates are respectively connected to the translation belts. In this design, the two translation guide rails of the translation component play a good guiding role for the folding mechanism, and there is also a conveyor shaft of the conveyor mechanism that can synchronously drive the translation belt to move. It is pulled in parallel from the left and right ends of the folding mechanism, so that the folding plate mechanism does not tilt during the back and forth reciprocating movement, thus ensuring the stability and reliability of the folding operation.

[0018] The lifting assembly is used to drive the pressure plate to fix the bag body and handles of the shopping bag onto the lifting platform and the folding plate respectively, and to drive the left and right folding plates to press the two handles of the shopping bag downwards on both sides of the telescopic template. The lifting assembly can be a cylinder with a guide rod or an electric cylinder, and various specific implementations are available.

[0019] As a preferred technical solution, the lifting assembly is provided in two sets. Each set of lifting assemblies includes a lifting cylinder, a lifting guide rail, and a lifting slider. The lifting slider is slidably connected to the lifting guide rail. The two sets of lifting assemblies are respectively connected to the left and right ends of the folding mechanism. This design allows the folding mechanism to move downwards in a balanced manner, avoiding jamming and tilting during the lifting process. Furthermore, this design does not occupy the upper space of the folding mechanism and does not affect the bag-transferring operation of the bag-transferring robot. The lifting assembly is connected to the left and right ends of the folding mechanism. One connection method is to install the lifting guide rail on the left and right ends of the folding mechanism bracket and install the lifting slider on the connecting plate of the translation assembly. Another connection method is to install the lifting slider on the left and right ends of the bracket and install the lifting guide rail on the connecting plate of the translation assembly. Both connection methods are equivalent.

[0020] The telescopic template is mounted on the lifting platform mechanism. Driven by its drive mechanism, the forward extension distance of the telescopic template can be set according to the width specifications of the shopping bag. The telescopic template is trapezoidal, with two sloping sides on its left and right sides. The folding plate mechanism includes two folding plates and their drive mechanism. Driven by the drive mechanism, the two folding plates swing left and right sequentially or move left and right, folding the two handles of the shopping bag under the telescopic template during the left-right movement or swinging. The folding plate mechanism, the lifting platform mechanism, and the telescopic template are all prior art, and relevant comparative documents have been provided in the background section of this utility model, so detailed description is unnecessary.

[0021] The beneficial effects of this utility model are as follows: Compared with the prior art, the technical solution of this utility model firstly integrates the rear pressure plate, pressure plate mechanism, and folding mechanism of the prior art into a simple downward folding mechanism, making the entire machine structure simple and compact; secondly, the downward folding mechanism of this utility model is slightly higher than the lifting platform, so the downward folding of the shopping bag will not affect the normal transmission work of the robotic arm mechanism, and the folding speed is fast and the efficiency is high. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structural principle of Embodiment 1 from the front and side.

[0023] Figure 2 This is a top view schematic diagram of the structural principle of Embodiment 1;

[0024] Figure 3 This is a schematic diagram of the structural principle of Embodiment 1 on the left.

[0025] Figure 4 This is a bottom view schematic diagram of the structural principle of the folding mechanism in the following embodiment;

[0026] Figures 5 to 9 This is a schematic diagram illustrating the working process and working principle of Embodiment 1;

[0027] Figure 10 This is a schematic diagram of the mechanism principle of Embodiment 2 from the front and side.

[0028] In the diagram: 1—Frame; 2—Push-folding plate mechanism; 21—Push-folding plate; 22—Push-folding motor; 23—Push-plate cylinder; 24—Push-plate guide rail; 3—Lifting platform mechanism; 31—Platform; 32—Platform cylinder; 33—Platform guide rod; 4—Telescopic template; 5—Lower folding mechanism; 51—Bracket; 52—Left folding plate; 53—Right folding plate; 54—Horizontal drive component; 541—Folding plate motor; 542—Folding plate pulley; 543—Folding plate belt; 544—Gear 545--Rack and pinion; 55--Folding plate guide rail; 56--Folding plate slider; 6--Pressure plate; 7--Lifting assembly; 71--Lifting cylinder; 72--Lifting guide rail; 73--Lifting slider; 8--Translation assembly; 81--Translation guide rail; 82--Translation slider; 83--Belt drive mechanism; 831--Translation motor; 832--Translation pulley; 833--Translation belt; 834--Drive shaft; 835--Translation cylinder; 84--Connecting plate; 9--Shopping bag; 91--Handle. Detailed Implementation

[0029] To fully disclose this utility model, two embodiments are described below with reference to the accompanying drawings to illustrate the technical solution of this utility model. In the description of this utility model, Figure 1 The left side is the front as described in this utility model. Figure 1 The right side is the rear part described in this utility model.

[0030] Example 1, as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown: The push-folding plate mechanism 2 of Embodiment 1 includes two push-folding plates 21 and a push-folding motor 22. Driven by the push-folding motor 22, the two push-folding plates 21 swing relative to each other, pushing and folding the two handles 91 of the shopping bag 9 under the telescopic template 4; the lifting platform mechanism 3 includes a platform 31 and a platform cylinder 32. A telescopic template 4 is also provided below the platform 31, and platform guide rods 33 are provided on both sides of the platform cylinder 32; the transverse drive component 54 includes a folding plate motor 541, a folding plate pulley 542, and a folding plate belt 543; the lower folding mechanism 5 is connected to the lifting assembly 7, and the lifting assembly 7 is connected to the connecting plate 84 of the translation mechanism 8; two sets of lifting assemblies 7 are provided, each The lifting assembly 7 includes a lifting cylinder 71, a lifting guide rail 72, and a lifting slider 73. The two lifting assemblies 7 are respectively connected to the left and right ends of the folding mechanism 5. The translation assembly 8 includes two translation guide rails 81 and two connecting plates 84. The two translation guide rails 81 are respectively provided with translation sliders 82. It also includes a belt drive mechanism 83. The belt drive mechanism 83 includes a translation motor 831, a drive shaft 834, and four translation pulleys 832. The translation motor 831 is connected to the drive shaft 834. Translation belts 833 are tensioned and installed on each pair of corresponding translation pulleys 832. The pressure plate 6 is connected to the bracket 51 of the folding mechanism 5.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown: Two push-bend plates 21 are rotatably mounted at the upper and lower middle positions of the front part of the frame 1. A push-bend motor 22 is connected to the lower part of each push-bend plate 21, and the body of the push-bend motor 22 is mounted on the frame 1. A translation guide rail 81 is installed on the left and right sides of the frame 1 above the push-bend plates 21. A translation slider 82 is installed on each translation guide rail 81. A connecting plate 84 is installed on the translation slider 82 on the left and right translation guide rails 81. Two lifting guide rails 72 are erected on the inner side of the two connecting plates 84. A drive shaft 834 is rotatably mounted at the position of the frame 1 corresponding to the front end of the two translation guide rails 81. A translation motor 831, which is a stepper motor, is connected to one end of the drive shaft 834. Two translation pulleys 832 are fixedly mounted on both sides of the drive shaft 834. A translation pulley 832 is rotatably mounted at the position of the frame 1 corresponding to the rear of the two translation pulleys 832. A translation belt 833 is tensioned and mounted on the two corresponding translation pulleys 832. The two translation belts 833 are then divided into left and right sections. Do not connect to the left and right connecting plates 84. Install two lifting guide rails 72 on each connecting plate 84. Set a tray with the front and both sides bent downward as a bracket 51. Install two lifting sliders 73 on the left and right ends of the bracket 51 respectively. Slide the bracket 51 through the lifting sliders 73 on the two lifting guide rails 72 set on each connecting plate 84. Note: The connection relationship between the lifting sliders 73 and the lifting guide rails 72 and the bracket 51 or connecting plate 84 can be interchanged. The lifting guide rails 72 can also be installed on the bracket 51. The lifting slider 73 is mounted on the connecting plate 84. Alternatively, the lifting guide rail 72 can be mounted on the bracket 51 and then on the connecting plate 84. These two connection methods are equivalent. A folding plate guide rail 55 is installed on the bottom surface of the bracket 51. Two folding plate sliders 56 are installed on the folding plate guide rail 55. A left folding plate 52 and a right folding plate 53 are installed on the two folding plate sliders 56 respectively. The left folding plate 52 and the right folding plate 53 also have a slanted edge at positions corresponding to the left and right slanted edges of the telescopic template 4, so that the slanted edge corresponds as closely as possible to the slanted edge of the telescopic template 4 (e.g., ...). Figure 2(As shown); A folding plate pulley 542 is rotatably installed on the left and right sides of the bracket 51, and a folding plate belt 543 is tensioned and installed on the two folding plate pulleys 542. The front end of the left folding plate 52 is connected to the rear layer of the folding plate belt 543, and the front end of the right folding plate 53 is connected to the front layer of the folding plate belt 543. A folding plate motor 541 is connected and installed on one of the folding plate pulleys 542. The folding plate motor 541 is a stepper motor. When the folding plate motor 541 rotates, it can drive the left folding plate 52 and the right folding plate 53 to move left and right relative to each other. The rotation angle of the folding plate motor 541 can be preset to adapt to the shopping bag 9. The folding width is specified; a pressure plate 6 is installed on the upper bracket 51 between the left folding plate 52 and the right folding plate 53; a platform cylinder 32 is installed on the frame 1 behind the two push-folding plates 21, with the cylinder rod of the platform cylinder 32 facing upwards; a platform guide rod 33 is slidably installed on the front and rear sides of the platform cylinder 32 respectively; a platform 31 is installed on the upper end of the two platform guide rods 33 and on the cylinder rod of the platform cylinder 32; a telescopic template 4 is installed below the platform 31, so that the left and right inclined sides of the telescopic template 4 correspond to the left folding plate 52 and the right folding plate 53, and also correspond to the two push-folding plates 21 and the pressure plate 6. Since the push-folding plate mechanism 2, the lifting platform mechanism 3, and the telescopic template 4 are existing technologies, and comparative documents have been provided in the background art of this utility model, they will not be described in detail here.

[0032] The specific working process of Example 1 is as follows: Figures 5 to 9As shown, in the initial state, the folding mechanism 5, its left folding plate 52 and right folding plate 53, and the pressure plate 6 are all in a forward position away from the lifting platform mechanism 3. The lifting cylinder 71 of the lifting component 7 is open, and the folding mechanism 5 is in a raised state. Although the folding mechanism 5 is in a raised state, it is only slightly higher than the height of a stack of shopping bags 9 on the lifting platform 31. This height will not affect the normal forward and backward passage of the bag transfer robot (omitted). The translation component 8 and the lifting component 7 are both set on the left and right sides of the bracket 51. The bag transfer robot can easily transfer the shopping bags 9 that need to be folded to the platform 31. As long as the shopping bags 9 are placed on the platform 31, the folding mechanism 5 can immediately perform the folding operation without waiting for the bag transfer robot. In addition, the forward extension of the telescopic template 4 has been set according to the width of the shopping bags 9 before the machine is started. By setting the rotation angle of the folding plate motor 541, the relative position between the left folding plate 52 and the right folding plate 53 corresponds to the left and right sides (two inclined sides) of the extended telescopic template 4. After the shopping bag 9 is conveyed onto the platform 31 of the lifting platform mechanism 3, the bag body (the part behind the handles 91) of the shopping bag 9 lies flat on the platform 31. The two handles 91 are located outside the left and right diagonal sides of the telescopic template 4, that is, the two handles 91 are suspended on the left and right sides of the telescopic template 4. The two handles 91 hang down slightly downwards due to their own weight, forming a shape that looks like... Figure 5 The state shown; then, the translation motor 831 opens the drive transmission shaft 834 and the translation pulley 832, causing the two translation belts 833 to drive the left and right connecting plates 84, the lifting assembly 7, and the folding mechanism 5 to move backward together. When they move to the position where the rear side of the pressure plate 6 corresponds vertically to the front side of the platform 31, they stop. After that, the two lifting cylinders 71 connected to the left and right sides of the bracket 51 are released simultaneously, driving the entire folding mechanism 5 to move downward along the lifting guide rail 72. At the same time, the left folding plate 52 and the right folding plate 53 also lift the shopping bag 9. The two handles 91 suspended on both sides of the telescopic template 4 are pressed downwards, causing them to bend downwards from the left and right diagonal edges of the template 4. Simultaneously, the rear of the pressure plate 6 mounted on the bracket 51 also moves downwards, pressing the shopping bag 9 onto the platform 3. At this point, the pressure plate 6 is blocked by the platform 31 and temporarily stops moving downwards, and the downward folding mechanism 5 also temporarily stops moving downwards. The two handles 91 are then pressed downwards by the left folding plate 52 and the right folding plate 53, respectively, into a nearly vertical downward position. From a top-down perspective, this forms a shape resembling... Figure 6 The state shown, viewed from the side, forms as follows: Figure 7 The state shown; then, the two push plate motors 22 turn on one after the other, driving the two folding plates 21 to rotate and swing towards the two handles 91 (i.e., swing towards the middle). During the swinging process, the two handles 91 of the shopping bag 9 are pushed and folded under the telescopic template 4. At this time, from the front and side view, it forms the state shown. Figure 8The state shown; then, the folding plate motor 541 opens to drive the folding plate pulley 542 and folding plate belt 543, causing the left folding plate 52 and right folding plate 53 to move and separate to the left and right sides simultaneously. This causes the left folding plate 52 and right folding plate 53 to move away from the two inclined sides of the telescopic template 4, that is, the left folding plate 52 and right folding plate 53 to leave the gap between the two push-folding plates 21 and the upper pressure plate 6. Then, the telescopic template 4 retracts back under the drive of its drive mechanism (omitted), and then the platform cylinder 32 releases, causing the platform 31 to move downward under the guidance of the two platform guide rods 33. Because the platform 31 descends, the pressure plate 6 loses the blocking effect of the platform 31, so... Driven by the lifting cylinder 71, the folding mechanism 5 moves downward again, causing the pressure plate 6 to press the two folded handles 91 of the shopping bag 9 against the two folding plates 21. At this time, the left folding plate 52 and the right folding plate 53 have left the gap between the folding plate 21 and the pressure plate 6, so the left folding plate 52 and the right folding plate 53 will not affect the downward movement of the pressure plate 6, allowing the pressure plate 6 to press the handles 91 against the folding plates 21. As the platform cylinder 32 continues to drive and the platform 31 descends, the bag body of the shopping bag 9 loses the support of the platform 31 and droops. The shopping bag 9 droops and bends into an L-shape behind the two folding push plates 21, forming a shape like... Figure 9 The state shown (because the left folding plate 52 and the right folding plate 53 have moved away from the left and right sides of the telescopic template 4, for ease of understanding, therefore, in) Figure 9 (The left folding plate 52 and right folding plate 53 are omitted from the diagram), and the handle 91 of the shopping bag 9 is folded. Then, the two lifting cylinders 71 open to drive the entire lower folding mechanism 5 and the pressure plate 6 upwards to reset. The translation motor 831 reverses, driving the lower folding mechanism 5 and the pressure plate 6 forward to reset. Then, the folding plate motor 541 opens to drive the left folding plate 52 and right folding plate 53 to move relative to each other to the position corresponding to the extended telescopic template 4, in preparation for the next folding procedure. Thus, the folding procedure for the handle 91 of the shopping bag 9 in Embodiment 9 is completed.

[0033] Example 2, the main difference between Example 2 and Example 1 is: Figure 10 As shown, in Embodiment 2, the lateral drive component 54 of the folding mechanism 5 is a gear and rack mechanism, including a folding plate motor 541, a gear 544, and two racks 545; the pressure plate 6 in Embodiment 2 is connected to the folding plate guide rail 55; the translation mechanism 8 in Embodiment 2 is also a belt drive mechanism 83, but in Embodiment 2, a translation cylinder 835 replaces the translation motor 831 in Embodiment 1; the folding plate pushing mechanism 2 in Embodiment 2 includes two folding plates 21, two push plate cylinders 23, and two push plate guide rails 24. The two folding plates 21 move linearly left and right along the push plate guide rails 24 under the drive of the push plate cylinders 23. The other mechanisms in Embodiment 2 are basically the same as those in Embodiment 1, and need not be described in detail here. Therefore, only the differences are briefly explained below. Figure 10 As shown, a gear 544 is rotatably installed on one side of the front of the folding plate guide rail 55 of the lower folding mechanism 5. A rack 545 is installed on the front and rear of the gear 544 respectively. The front rack 545 is connected to the right folding plate 53, and the rear rack 545 is connected to the left folding plate 52, so that the front and rear racks 545 mesh with the gear 544 respectively. The pressure plate 6 is installed on the rear side of the folding plate guide rail 6. Two push plate guide rails 24 are installed at the front and rear of the frame 1 below the lower folding mechanism 5. Two push folding plates 21 are slidably installed on the push plate guide rails 24 through the slider. A push plate cylinder 23 is installed on each push folding plate 21. The tail ends of the two push plate cylinders 23 are installed on the frame 1 respectively. A translation cylinder 835 is installed on the frame 1. The cylinder rod of the translation cylinder 835 is connected to the connecting plate 84 of the belt drive mechanism 83. The other installation methods and structures of the belt drive mechanism 83 are the same as in Embodiment 1.

[0034] The specific working process of Example 2 is as follows: Figure 10As shown, before starting the machine, the forward extension range of the telescopic template 4 should be set according to the width of the shopping bag 9. Then, the rotation angle of the control system of the folding motor 541 (stepper motor) should be set. After starting the machine, the folding motor 541 opens the drive gear 544 to rotate a certain angle, so that a rack meshed in front of the gear 544 drives the right folding plate 53 to move left and right a certain distance. At the same time, a rack meshed behind the gear 544 drives the left folding plate 52 to move the same distance, and the distance between the left folding plate 52 and the right folding plate 53 corresponds to the left and right inclined sides of the telescopic template 4. After that, the translation cylinder 835 opens and pulls the connecting plate 84 to move backward. Because of the presence of the drive shaft 834 with the rotating mechanism 83, the translation pulley 832, and the translation belt 833, the connecting plate 84 on the other side also moves backward in parallel at the same time. It is precisely because of the balancing effect of the belt drive mechanism 83 that the translation cylinder 83... 5. When the folding mechanism 5 moves back and forth, it will not shake or become unbalanced. When the left folding plate 52, right folding plate 53 and pressure plate 6 of the folding mechanism 5 move to the corresponding positions of the telescopic template 4 and platform 31, they stop and press down. Then, the two push plate cylinders 23 open one after another, driving the push folding plate 21 to move straight towards the middle, pushing the two handles 91 of the shopping bag 9 to the bottom surface of the telescopic template 4. After that, the folding plate motor 541 opens the drive gear 544 to drive the two racks 545 to move the left folding plate 52 and right folding plate 53 to the left and right sides away from the two inclined sides of the telescopic template 4. Then, the telescopic template 4 retracts back under the drive of its drive mechanism. Then, the platform 31 moves downward under the drive of the platform cylinder 32. After the platform 31 moves downward, the pressure plate 6 loses the obstruction of the platform 31 and moves downward again, so that the pressure plate 6 presses down and fixes the folded handles 91 on the top of the two push folding plates 21. The subsequent working process of Example 2 is the same as that of Example 1, and will not be repeated here.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0037] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A folding device for the handle of a shopping bag, comprising a frame (1), a folding plate mechanism (2), and a lifting platform mechanism (3), wherein the lifting platform mechanism (3) is further provided with a telescopic template (4), characterized in that: Above the push-folding plate mechanism (2), there is also a downward folding mechanism (5). The downward folding mechanism (5) includes a bracket (51), a left folding plate (52), a right folding plate (53), and a transverse drive member (54). The left folding plate (52) and the right folding plate (53) are respectively connected to the transverse drive member (54). The left folding plate (52) and the right folding plate (53) correspond to the left and right sides of the telescopic template (4). Above the left folding plate (52) and the right folding plate (53), there is also a pressure plate (6). A translation component (8) and a lifting component (7) are also connected to the bracket (51).

2. The folding handle device for a shopping bag according to claim 1, characterized in that: The left folding plate (52) and the right folding plate (53) are respectively connected to folding plate sliders (56), and the bracket (51) is also provided with a folding plate guide rail (55). The left folding plate (52) and the right folding plate (53) are respectively slidably mounted on the folding plate guide rail (55) via the folding plate sliders (56).

3. The folding handle device for a shopping bag according to claim 1, characterized in that: The lateral drive component (54) includes a folding plate motor (541), two folding plate pulleys (542), and a folding plate belt (543). The folding plate belt (543) is tensioned and installed on the two folding plate pulleys (542), and the folding plate motor (541) is connected to one of the folding plate pulleys (542).

4. The folding handle device for a shopping bag according to claim 1, characterized in that: The pressure plate (6) is connected to the bracket (51) of the folding mechanism (5).

5. The folding device for the handle of a shopping bag according to claim 1, characterized in that: The folding mechanism (5) is connected to the lifting assembly (7), the lifting assembly (7) is connected to the translation assembly (8), and the translation assembly (8) is mounted on the frame (1).

6. The folding device for the handle of a shopping bag according to claim 1, characterized in that: The translation component (8) includes two translation guide rails (81), two connecting plates (84), and a belt drive mechanism (83). The two translation guide rails (81) are respectively provided with translation sliders (82). The translation guide rails (81) are respectively arranged on both sides of the frame (1). The two connecting plates (84) are respectively connected to the translation sliders (82). The connecting plates (84) are connected to the belt drive mechanism (83).

7. A folding handle device for a shopping bag according to claim 6, characterized in that: The belt drive mechanism (83) includes a translation motor (831), a drive shaft (834), and four translation pulleys (832). The translation motor (831) is connected to the drive shaft (834). Two translation pulleys (832) are fixedly mounted on the drive shaft (834) and rotatably mounted on both sides of the frame (1). The two translation pulleys (832) fixedly mounted on the drive shaft (834) correspond to the two translation pulleys (832) rotatably mounted on the frame (1) respectively. Translation belts (833) are respectively provided on the two translation pulleys (832) that correspond to each other. The two connecting plates (84) are respectively connected to the translation belts (833).

8. The folding device for the handle of a shopping bag according to claim 1, characterized in that: The lifting assembly (7) is provided in two sets. Each set of lifting assembly (7) includes a lifting cylinder (71), a lifting guide rail (72), and a lifting slider (73). The lifting slider (73) is slidably connected to the lifting guide rail (72). The two sets of lifting assemblies (7) are respectively connected to the left and right ends of the folding mechanism (5).

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