A bag supporting device

Abstract

The utility model provides a kind of bag supporting device, including bag supporting unit and push unit;Bag supporting unit includes a plurality of bag supporting mechanism in one arrangement;Each bag supporting mechanism includes two rotatable bag supporting plates and the elastic member of keeping two bag supporting plates open;Each bag supporting plate includes force receiving portion;Push unit includes pusher and push drive mechanism;Push drive mechanism is configured to drive pusher to approach or away from bag supporting unit;When pusher approaches bag supporting unit, pusher can simultaneously push the force receiving portion of all bag supporting plates in bag supporting unit, so that the two bag supporting plates of all bag supporting mechanisms in bag supporting unit are synchronously folded up.The bag supporting device provided by the utility model simultaneously pushes the bag supporting plate of a plurality of bag supporting mechanisms in one arrangement by setting one pusher, and realizes the synchronous folding of the bag supporting plate of multiple bag supporting mechanisms.

Description

Technical Field

[0001] This utility model relates to the field of material packaging equipment technology, and more specifically, to a bag-supporting device. Background Technology

[0002] The content in this section only provides background information related to this utility model and may not constitute prior art.

[0003] In automated material packaging equipment such as bagging machines, one of the key processes is to efficiently and reliably open the bag opening for subsequent filling.

[0004] Patent application number CN201922044424.9, entitled "A Bag-Setting Device for a Horizontal Bag-Setting Machine," discloses a bag-setting device. This device uses a turntable drive mechanism to intermittently rotate multiple bag-setting mechanisms on a turntable, and employs a bag-setting drive cylinder to sequentially drive the two bag-setting plates of each mechanism to close, facilitating bag setting. While this device achieves the basic bag-setting function, its drive cylinder can only drive the two bag-setting plates of one mechanism at a time. This means that only one bag can be prepared for bag setting within one turntable pause cycle, limiting production efficiency. Furthermore, this solution requires precise alignment of the drive cylinder's push rod with the pushing end of the bag-setting plate at the current station, placing high demands on the turntable's rotational accuracy and the mechanism's installation precision. Otherwise, problems such as incomplete pushing or mechanism interference can easily occur, affecting the reliability and stability of the equipment's operation. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a bag-holding device to overcome at least the problems of low production efficiency caused by existing bag-holding devices being able to drive the two bag-holding plates of a single bag-holding mechanism to close at any one time, as well as the excessively high requirements for turntable rotation accuracy and drive alignment accuracy.

[0006] The objective of this utility model is achieved through the following technical solution: This utility model provides a bag-supporting device, including: The bag-supporting unit includes multiple bag-supporting mechanisms arranged in a line; each bag-supporting mechanism includes two rotatable bag-supporting plates and an elastic element that drives the two bag-supporting plates to remain open; each bag-supporting plate includes a force-receiving part that can rotate about its own rotation axis. A pushing unit includes a pushing member and a pushing drive mechanism; the pushing member extends along the arrangement direction of the plurality of bag-supporting mechanisms and is opposite to the bag-supporting unit; the pushing drive mechanism is configured to drive the pushing member to move closer to or away from the bag-supporting unit. When the pushing member approaches the bag-supporting unit, the pushing member can simultaneously push the force-bearing part of all the bag-supporting plates in the bag-supporting unit, so that the two bag-supporting plates of all the bag-supporting mechanisms in the bag-supporting unit retract synchronously.

[0007] Optionally, the force-bearing part includes a rolling element; the rolling element is used to contact and engage with the pushing element so that rolling friction is formed between them.

[0008] Optionally, the pushing drive mechanism includes: The mounting bracket is fixedly installed next to the bag support unit; Multiple connecting arms are arranged sequentially and parallel to each other along the extension direction of the pusher; the two ends of each connecting arm are respectively hinged to the mounting frame and the pusher. A drive arm, one end of which is hinged to the pusher; A linear actuator, the output shaft of which is hinged to the other end of the drive arm.

[0009] Optionally, each of the two bag-supporting plates of the bag-supporting mechanism is provided with meshing teeth to keep the rotation of the two bag-supporting plates of each bag-supporting mechanism synchronized.

[0010] Optionally, the bag-supporting unit further includes an installation mechanism that corresponds one-to-one with the bag-supporting mechanism; The mounting mechanism includes two oppositely arranged mounting seats; the two bag-supporting plates of each bag-supporting mechanism are rotatably mounted to the two mounting seats of the corresponding mounting mechanism. The spacing between the two mounting seats of each mounting mechanism is adjustable.

[0011] Optionally, the bag support unit further includes an adjustment drive mechanism configured to drive the two mounting seats of all the mounting mechanisms closer to or further apart from each other.

[0012] Optionally, the adjustment drive mechanism includes an adjustment lead screw; The adjusting screw passes sequentially through the mounting bases of all the mounting mechanisms and is threadedly connected to each mounting base; the threads of the two mounting bases of each mounting mechanism that are threadedly connected to the adjusting screw are in opposite directions.

[0013] Optionally, the adjustment drive mechanism further includes a guide rod parallel to the adjustment lead screw; the mounting base of all the mounting mechanisms is slidably engaged with the guide rod.

[0014] Optionally, one end of the adjusting screw is connected to a handle or an adjusting motor.

[0015] Optionally, the bag-supporting device further includes: A rotatable turntable; the turntable is provided with an installation window corresponding to each of the bag-supporting mechanisms, and each bag-supporting mechanism is installed at the corresponding installation window; There are multiple bag-supporting units, which are distributed sequentially around the rotation axis of the turntable, so that when the turntable rotates, the multiple bag-supporting units can be sequentially moved to positions opposite to the pushing unit.

[0016] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects: The bag-holding device provided by this utility model uses a pushing component to simultaneously push the bag-holding plates of multiple bag-holding mechanisms arranged in a straight line, achieving synchronous retraction of the bag-holding plates of multiple bag-holding mechanisms. This structural design overcomes the problem of low production efficiency caused by existing bag-holding devices that can only drive the bag-holding plate of a single bag-holding mechanism to retract at a time. At the same time, it reduces the precision requirements for the consistency of the actions of each bag-holding machine, ensuring the reliability and stability of multiple bag-holding mechanisms when performing the retraction action, which is conducive to improving production efficiency. Attached Figure Description

[0017] Figure 1 A schematic diagram of the bag-supporting device provided in an embodiment of this utility model; Figure 2 A schematic diagram of the bag-supporting device provided in an embodiment of this utility model from another perspective; Figure 3 A schematic diagram of the structure of the bag support unit provided in an embodiment of this utility model; Figure 4 A schematic diagram of the structure of a single bag-supporting mechanism and an installation mechanism provided for an embodiment of this utility model; Figure 5 A schematic diagram of the structure of the pushing unit provided in an embodiment of this utility model.

[0018] Icons: 10-bag support unit, 11-bag support mechanism, 111-bag support plate, 112-force-bearing part, 1121-connecting shaft, 1122-rolling element, 113-tooth part, 12-mounting mechanism, 121-mounting seat, 13-adjustment drive mechanism, 131-adjusting screw, 132-guide rod, 133-handle, 20-pushing unit, 21-pushing element, 22-pushing drive mechanism, 221-mounting bracket, 222-connecting arm, 223-drive arm, 224-linear driver, 30-turntable, 31-mounting window, 40-rotation drive component. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments. The same reference numerals in the accompanying drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components with different arrangements, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0021] An embodiment of this utility model provides a bag-opening device that can be applied to automated material packaging equipment such as bagging machines. It is mainly used to open up a packaging bag with the opening already opened, so as to facilitate the feeding of the material to be packaged into the packaging bag.

[0022] Figure 1 and Figure 2 The diagrams schematically illustrate the structure of the bag-supporting device provided by this invention from two different perspectives. For example... Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, the bag-supporting device may include a bag-supporting unit 10 and a pushing unit 20.

[0023] Combination Figure 2 and Figure 3 As shown, the bag-opening unit 10 may include a plurality of bag-opening mechanisms 11 arranged in a line. Each bag-opening mechanism 11 is adapted to open a packaging bag. By way of example, the accompanying drawings of this utility model show a case with three bag-opening mechanisms 11. Of course, the number of bag-opening mechanisms 11 is not limited to this and is not limited here.

[0024] Each bag-supporting mechanism 11 may include two rotatable bag-supporting plates 111 and an elastic element (not shown) that drives the two bag-supporting plates 111 to remain open. Furthermore, each bag-supporting plate 111 may also include a force-receiving part 112 that can rotate about its own axis of rotation. That is, the force-receiving part 112 can rotate with the corresponding bag-supporting plate 111.

[0025] In this type of bag-opening mechanism 11, for a single bag-opening mechanism 11, under normal conditions, the two bag-opening plates 111 remain open under the action of the elastic element. When it is necessary to open the bag, force is first applied simultaneously to the force-bearing parts 112 of the two bag-opening plates 111, causing the two bag-opening plates 111 to overcome the elastic force of the elastic element and rotate around their respective rotation axes until the front ends of the two bag-opening plates 111 retract, so that the front ends of the two bag-opening plates 111 can enter the interior of the packaging bag through the bag opening. On this basis, the force acting on the force-bearing parts 112 of the two bag-opening plates 111 is removed, and the two bag-opening plates 111 rotate in opposite directions around their respective rotation axes under the action of the elastic element, thereby opening the packaging bag. It should be noted that the function of opening a single packaging bag using a single bag-opening mechanism 11 is a common function of existing bag-opening devices. Therefore, the specific structure of the bag-opening plate 111 and the specific arrangement of the elastic element can be referred to existing bag-opening devices, and will not be elaborated further here.

[0026] The pushing unit 20 is mainly used to simultaneously apply the force described above to the force-bearing part 112 of all the bag-supporting plates 111 in the bag-supporting unit 10, so that the two bag-supporting plates 111 of all the bag-supporting mechanisms 11 can be closed synchronously.

[0027] Specifically, in combination Figure 2 As shown, the pushing unit 20 may include a pushing member 21 and a pushing drive mechanism 22. The pushing member 21 extends along the arrangement direction of the plurality of bag-supporting mechanisms 11 and is opposite to the bag-supporting unit 10, specifically opposite to the force-receiving portion 112 of all bag-supporting plates 111 in the bag-supporting unit 10. The pushing member 21 may be in the form of a plate.

[0028] The pushing drive mechanism 22 is configured to drive the pushing member 21 to move closer to or further away from the bag-supporting unit 10. When the pushing member 21 approaches the bag-supporting unit 10, it simultaneously pushes the force-bearing portions 112 of all the bag-supporting plates 111 in the bag-supporting unit 10, applying the aforementioned force to the force-bearing portions 112 of all the bag-supporting plates 111 simultaneously, causing the two bag-supporting plates 111 of all the bag-supporting mechanisms 11 in the bag-supporting unit 10 to close synchronously. Conversely, when the pushing member 21 moves away from the bag-supporting unit 10, the force-bearing portions 112 of all the bag-supporting plates 111 in the bag-supporting unit 10 are no longer under force, and the two bag-supporting plates 111 of all the bag-supporting mechanisms 11 will open synchronously under the action of their respective elastic members.

[0029] According to an embodiment of this utility model, by setting a pushing member 21 to simultaneously push the bag-supporting plates 111 of multiple bag-supporting mechanisms 11 arranged in a straight line, the bag-supporting plates 111 of multiple bag-supporting mechanisms 11 are synchronously retracted, thereby enabling the packaging bag corresponding to the number of bag-supporting mechanisms 11 to be opened at one time. This structural design overcomes the problem of low production efficiency caused by existing bag-supporting devices that can only drive the bag-supporting plate 111 of a single bag-supporting mechanism 11 to retract at a time. At the same time, it reduces the precision requirements for the consistency of the actions of each bag-supporting mechanism 11, ensuring the reliability and stability of multiple bag-supporting mechanisms 11 when performing the retraction action, which is conducive to improving production efficiency.

[0030] In some possible embodiments, combined Figure 2 and Figure 5 As shown, the push drive mechanism 22 may include a mounting bracket 221, multiple connecting arms 222, a drive arm 223, and a linear driver 224.

[0031] The mounting bracket 221 can be fixedly mounted on the side of the bag support unit 10. Multiple connecting arms 222 are arranged sequentially and parallel to each other along the extending direction of the pusher 21. Both ends of each connecting arm 222 are hinged to the mounting bracket 221 and the pusher 21, respectively. Thus, the multiple connecting arms 222, the pusher 21, and the mounting bracket 221 together constitute a parallelogram motion mechanism. Exemplarily, the accompanying drawings of this utility model show a configuration with two connecting arms 222.

[0032] One end of the drive arm 223 is hinged to the pusher 21, and the other end of the drive arm 223 is hinged to the output shaft of the linear driver 224.

[0033] Based on the above configuration, simply controlling the extension or retraction of the output shaft of the linear actuator 224 allows the pusher 21 to perform translational motion to move closer to or away from the bag-supporting unit 10. This design not only enables the reciprocating motion of the pusher 21 but also effectively prevents the pusher 21 from deflecting during the motion. It ensures that the pusher 21 simultaneously and smoothly contacts the force-bearing parts 112 of all bag-supporting plates 111 in the bag-supporting unit 10, and also helps to make the force exerted by the pusher 21 on the bag-supporting plates 111 of all bag-supporting mechanisms 11 more uniform.

[0034] In some possible embodiments, refer to Figure 4 As shown, the force-bearing portion 112 of each bag support plate 111 may include a connecting shaft 1121 and a rolling element 1122. The connecting shaft 1121 is fixedly connected to the corresponding bag support plate 111. The rolling element 1122 is coaxially sleeved on the connecting shaft 1121 and can rotate around the connecting shaft 1121. For example, the rolling element 1122 may be a rolling bearing.

[0035] The rolling element 1122 is used to contact and engage with the pushing element 21 to create rolling friction between them. Specifically, when the pushing element 21 approaches the bag-supporting unit 10 to push the force-bearing portions 112 of all the bag-supporting plates 111 in the bag-supporting unit 10, the force-bearing portions 112 that contact the pushing element 21 are essentially the circumferential outer wall of the rolling element 112. This design can transform the friction between the pushing element 21 and the force-bearing portions 112 into rolling friction, which helps to reduce the frictional force between the pushing element 21 and the force-bearing portions 112, making the entire pushing operation smoother, reducing the driving load on the pushing element 21, and improving the service life and reliability of the mechanism.

[0036] In some possible embodiments, reference continues to be made to Figure 4 As shown, for a single bag-holding mechanism 11, each bag-holding mechanism 11 has two bag-holding plates 111 with corresponding meshing teeth 113 to keep the rotation of the two bag-holding plates 111 of each bag-holding mechanism 11 synchronized. In other words, by providing meshing teeth 113 on the two bag-holding plates 111 of each bag-holding mechanism 11, the two bag-holding plates 111 of each bag-holding mechanism 11 can perform symmetrical and synchronous reverse movements, which helps to eliminate the problem of asynchronous movement of the two bag-holding plates 111 caused by uneven force applied by the elastic element, and makes the opening and closing movements of the two bag-holding plates 111 more stable.

[0037] In some possible embodiments, combined Figures 2 to 4 As shown, the bag-supporting unit 10 may further include mounting mechanisms 12 corresponding to the bag-supporting mechanisms 11. Each mounting mechanism 12 includes two opposing mounting seats 121. Specifically, the arrangement direction of the two mounting seats 121 is consistent with the arrangement direction of the two bag-supporting plates 111 of the corresponding bag-supporting mechanism 11. The two bag-supporting plates 111 of each bag-supporting mechanism 11 are rotatably mounted onto the two mounting seats 121 of the corresponding mounting mechanism 12. Furthermore, the distance between the two mounting seats 121 of each mounting mechanism 12 is adjustable.

[0038] By adding a mounting mechanism 12 corresponding to the bag-supporting mechanism 11, and making the distance between the two mounting seats 121 of the mounting mechanism 12 adjustable, the bag-supporting device can adapt to packaging bags of various widths. Specifically, for packaging bags of different widths, it is only necessary to adjust the distance between the two mounting seats 121 in each mounting mechanism 12 according to the width of the packaging bag, and replace the bag-supporting plate 111 with one that matches the width of the packaging bag. This structural design effectively improves the versatility and flexibility of the bag-supporting device, and solves the problem that existing bag-supporting devices are difficult to adapt to packaging bags of various widths.

[0039] Furthermore, combined Figure 2 and Figure 3As shown, the bag support unit 10 may also include an adjustment drive mechanism 13. The adjustment drive mechanism 13 is configured to drive the two mounting seats 121 of all mounting mechanisms 12 to move closer or further apart from each other, thereby achieving synchronous adjustment of the distance between the two mounting seats 121 of all mounting mechanisms 12.

[0040] By setting an adjustment drive mechanism 13 to drive all mounting bases 121, the function of quickly and synchronously adjusting the distance between the two mounting bases 121 of all mounting mechanisms 12 is realized, avoiding the tediousness of adjusting them one by one.

[0041] Specifically, such as Figure 3 As shown, the adjustment drive mechanism 13 may include an adjustment screw 131 and a guide rod 132 parallel to the adjustment screw 131. The axis of the adjustment screw 131 is parallel to the arrangement direction of the plurality of bag-supporting mechanisms 11 and can rotate about its own axis. The adjustment screw 131 passes through the mounting seats 121 of all the mounting mechanisms 12 in sequence and is threadedly connected to each mounting seat 121. The threads of the two mounting seats 121 of each mounting mechanism 12 that are threaded to the adjustment screw 131 are in opposite directions.

[0042] The mounting base 121 of all mounting mechanisms 12 is slidably engaged with the guide rod 132. Exemplarily, the guide rod 132 passes through the mounting base 121 of all mounting mechanisms 12 in sequence and is slidably connected to each mounting base 121.

[0043] Thus, when the adjusting screw 131 is driven to rotate, based on the principle of threaded transmission, the mounting seats 121 of multiple mounting mechanisms 12 will move simultaneously along the axial direction of the adjusting screw 131. Furthermore, for a single mounting mechanism 12, since the threads of the two mounting seats 121 of the mounting mechanism 12 are opposite to those of the adjusting screw 131, when the adjusting screw 131 rotates, the two mounting seats 121 in a single mounting mechanism 12 will move towards or away from each other along the axial direction of the adjusting screw 131, thereby achieving the purpose of adjusting the distance between the two mounting seats 121.

[0044] Understandably, by using an adjusting screw 131 with reverse threads to sequentially connect all mounting seats 121, simply rotating the adjusting screw 131 can synchronously drive the two mounting seats 121 of all mounting mechanisms 12 to move closer or further apart. This results in a simple and compact structure, precise and reliable adjustment, and low manufacturing cost. Simultaneously, by adding a guide rod 132 parallel to the adjusting screw 131, reliable guidance and support are provided for the movement of each mounting seat 121, preventing deflection or jamming during adjustment and ensuring the smoothness of the spacing adjustment process.

[0045] In addition, continue to refer to Figure 3As shown, one end of the adjusting screw 131 can also be connected to a handle 133 or an adjusting motor (not shown in the figure). The handle 133 or the adjusting motor serves as the power source for driving the adjusting screw 131 to rotate. When the adjusting screw 131 is connected to the handle 133, the adjusting screw 131 is suitable for manual operation to rotate; when the adjusting screw 131 is connected to the adjusting motor, the adjusting screw 131 is suitable for electric adjustment to rotate.

[0046] In some possible embodiments, such as Figure 1 and Figure 2 As shown, the bag-supporting device may further include a rotatable turntable 30 and a rotary drive component 40 for driving the turntable 30 to rotate. The rotary drive component 40 may include a drive motor that is drively connected to the turntable 30.

[0047] The turntable 30 is provided with mounting windows 31 corresponding to each bag-holding mechanism 11, and each bag-holding mechanism 11 is installed at its corresponding mounting window 31. The mounting windows 31 facilitate the smooth passage of the material to be packaged through the feeding channel formed between the two bag-holding plates 111 of each bag-holding mechanism 11 and into the corresponding packaging bag. When the bag-holding device includes the turntable 30, the mounting mechanism 12 and the adjustment drive mechanism 13 of the aforementioned bag-holding unit 10 can both be mounted on the turntable 30.

[0048] Furthermore, multiple bag-supporting units 10 can be configured, with the multiple bag-supporting units 10 distributed sequentially around the rotation axis of the turntable 30. This allows the multiple bag-supporting units 10 to be moved sequentially to positions opposite to the pushing unit 20 when the turntable 30 rotates. This design constitutes an efficient multi-station cyclic operation system, enabling the entire bag-supporting, material feeding, and packaging operation to be carried out continuously.

[0049] For example, the accompanying drawings of this utility model illustrate a configuration with two bag-supporting units 10, which can be arranged symmetrically. With this configuration, each 180° rotation of the turntable 30 moves one bag-supporting unit 10 to a position opposite the pushing unit 20. Of course, the number of bag-supporting units 10 is not limited to this and is not specified herein.

[0050] In the case where the push-drive mechanism 22 includes a mounting bracket 221, the aforementioned rotary drive component 40 can be directly mounted on the mounting bracket 221, making the structure of the bag-supporting device more compact.

[0051] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bag-supporting device, characterized in that, include: The bag-supporting unit includes multiple bag-supporting mechanisms arranged in a line; each bag-supporting mechanism includes two rotatable bag-supporting plates and an elastic element that drives the two bag-supporting plates to remain open; each bag-supporting plate includes a force-receiving part that can rotate about its own rotation axis. A pushing unit includes a pushing member and a pushing drive mechanism; the pushing member extends along the arrangement direction of the plurality of bag-supporting mechanisms and is opposite to the bag-supporting unit; the pushing drive mechanism is configured to drive the pushing member to move closer to or away from the bag-supporting unit. When the pushing member approaches the bag-supporting unit, the pushing member can simultaneously push the force-bearing part of all the bag-supporting plates in the bag-supporting unit, so that the two bag-supporting plates of all the bag-supporting mechanisms in the bag-supporting unit retract synchronously.

2. The bag-supporting device according to claim 1, characterized in that, The force-bearing part includes a rolling element; the rolling element is used to contact and cooperate with the pushing element so that rolling friction is formed between the two.

3. The bag-supporting device according to claim 1, characterized in that, The jacking drive mechanism includes: The mounting bracket is fixedly installed next to the bag support unit; Multiple connecting arms are arranged sequentially and parallel to each other along the extension direction of the pusher; the two ends of each connecting arm are respectively hinged to the mounting frame and the pusher. A drive arm, one end of which is hinged to the pusher; A linear actuator, the output shaft of which is hinged to the other end of the drive arm.

4. The bag-supporting device according to claim 1, characterized in that, Each of the two bag-supporting plates of the bag-supporting mechanism is provided with corresponding meshing teeth so that the rotation of the two bag-supporting plates of each bag-supporting mechanism is synchronized.

5. The bag-supporting device according to claim 1, characterized in that, The bag-supporting unit also includes an installation mechanism that corresponds one-to-one with the bag-supporting mechanism; The mounting mechanism includes two oppositely arranged mounting seats; the two bag-supporting plates of each bag-supporting mechanism are rotatably mounted to the two mounting seats of the corresponding mounting mechanism. The spacing between the two mounting seats of each mounting mechanism is adjustable.

6. The bag-supporting device according to claim 5, characterized in that, The bag support unit also includes an adjustment drive mechanism configured to drive the two mounting seats of all the mounting mechanisms to move closer or further apart from each other.

7. The bag-supporting device according to claim 6, characterized in that, The adjustment drive mechanism includes an adjustment screw; The adjusting screw passes sequentially through the mounting bases of all the mounting mechanisms and is threadedly connected to each mounting base; the threads of the two mounting bases of each mounting mechanism that are threadedly connected to the adjusting screw are in opposite directions.

8. The bag-supporting device according to claim 7, characterized in that, The adjustment drive mechanism also includes a guide rod parallel to the adjustment lead screw; the mounting bases of all the mounting mechanisms are slidably engaged with the guide rod.

9. The bag-supporting device according to claim 7, characterized in that, One end of the adjusting screw is connected to a handle or an adjusting motor.

10. The bag-supporting device according to claim 1, characterized in that, Also includes: A rotatable turntable; the turntable is provided with an installation window corresponding to each of the bag-supporting mechanisms, and each bag-supporting mechanism is installed at the corresponding installation window; There are multiple bag-supporting units, which are distributed sequentially around the rotation axis of the turntable, so that when the turntable rotates, the multiple bag-supporting units can be sequentially moved to positions opposite to the pushing unit.

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