A bag support device

Abstract

The invention discloses a bag-stretching device, which relates to the field of production and packaging technology, and solves the problem that the existing bag-stretching device can only stretch woven bags with the same bag opening size into a fixed shape. The bag-stretching device comprises: a mounting base plate with an annular channel, a plurality of bag-stretching mechanisms, a plurality of bag-clamping mechanisms, and a driving motor; each bag-stretching mechanism and each bag-clamping mechanism are arranged on the mounting base plate around the annular channel; each bag-stretching mechanism and each bag-clamping mechanism have a free end. The driving motor causes the free end of each bag-stretching mechanism and the free end of each bag-clamping mechanism to rotate from an initial state to an expanded state in the same direction at the same time, thereby forming an annular structure. The size of the annular structure can be adjusted by the rotation angle of the bag-stretching mechanism and the bag-clamping mechanism. The specific shape of the annular structure can be adjusted by the number of the bag-stretching mechanism and the bag-clamping mechanism. The same bag-stretching device can stretch the bag openings of woven bags with different bag opening sizes into different shapes.

Description

Technical Field

[0001] The invention relates to the technical field of production packaging, and in particular to a bag-supporting device. Background Art

[0002] At present, the bag-opening devices on the market can only open woven bags with the same bag opening sizes, but cannot open woven bags with different bag opening sizes according to specific working conditions.

[0003] Moreover, a bag-stretching device can only stretch the bag opening of the woven bag into a specific shape, such as a rectangle or a square, but cannot stretch the bag opening of the woven bag into a desired shape according to specific working conditions. Summary of the invention

[0004] The object of the present invention is to provide a bag-stretching device, which is used to enable the same bag-stretching device to stretch the bag openings of woven bags with different bag opening sizes into different shapes.

[0005] In order to achieve the above-mentioned object, the present invention provides a bag-supporting device, comprising: a mounting base, a plurality of bag-supporting mechanisms for supporting the bag, a plurality of bag-clamping mechanisms for clamping the bag opening, and a driving motor for providing rotational torque to the bag-supporting mechanisms and the bag-clamping mechanisms. The mounting base has an annular channel, and each bag-supporting mechanism and each bag-clamping mechanism are arranged on the mounting base around the annular channel. Each bag-supporting mechanism and each bag-clamping mechanism has a free end.

[0006] When the bag-holding device is in the initial state, the distance between the orthographic projection of the free end of each bag-holding mechanism on the mounting substrate and the geometric center of the annular channel is d11. When the bag-holding device is in the expanded state, the distance between the orthographic projection of the free end of each bag-holding mechanism on the mounting substrate and the geometric center of the annular channel is d21. At this time, d11<d21.

[0007] When the bag-holding device is in the initial state, the distance between the orthographic projection of the free end of each bag-clamping mechanism on the mounting substrate and the geometric center of the annular channel is d12. When the bag-holding device is in the expanded state, the distance between the orthographic projection of the free end of each bag-clamping mechanism on the mounting substrate and the geometric center of the annular channel is d22. At this time, d12<d22.

[0008] Compared with the prior art, in the bag-stretching device provided by the present invention, the mounting base plate has an annular channel, and each bag-stretching mechanism and each bag-clamping mechanism are arranged on the mounting base plate around the annular channel. Each bag-stretching mechanism and each bag-clamping mechanism have a free end. The driving motor drives each bag-stretching mechanism and each bag-clamping mechanism to rotate in the same direction, so that the free end of each bag-stretching mechanism and the free end of each bag-clamping mechanism rotate from the initial state to the opened state in the same direction at the same time. At this time, the free end of each bag-stretching mechanism and the free end of each bag-clamping mechanism form an annular structure. The rotation angle of each bag-stretching mechanism and each bag-clamping mechanism can be adjusted by the driving motor. Thereby, it is ensured that the bag-stretching device can stretch the bag openings of woven bags with different bag opening sizes. Moreover, the bag-stretching device provided by the present invention can also design the number of bag-stretching mechanisms and bag-clamping mechanisms according to the shape of the bag opening to be stretched. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0010] Figure 1 A schematic diagram of the structure of the bag-supporting device provided by an embodiment of the present invention in an initial state;

[0011] Figure 2 A schematic diagram of the structure of the bag-opening device provided by an embodiment of the present invention in an open state;

[0012] Figure 3 A schematic structural diagram of a first transmission member provided in an embodiment of the present invention;

[0013] Figure 4 A schematic structural diagram of a second transmission member provided in an embodiment of the present invention;

[0014] Figure 5 This is a schematic diagram of the structure in which the first transmission members rotate in the same direction in an embodiment of the present invention;

[0015] Figure 6 It is a schematic diagram of the structure of the cooperation between the first transmission member and the third rotating wheel in an embodiment of the present invention;

[0016] Figure 7 A schematic diagram of the structure of the bag-supporting mechanism and the first transmission member provided in an embodiment of the present invention;

[0017] Figure 8 A schematic structural diagram of the cooperation between the bag clamping mechanism and the first transmission member provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Reference Figure 1 and Figure 2 The embodiment of the present invention provides a bag-holding device. The bag-holding device comprises: a mounting base 1, a plurality of bag-holding mechanisms 4 for holding the bag, a plurality of bag-clamping mechanisms 5 for clamping the bag opening, and a driving motor 6 for providing rotational torque to the bag-holding mechanisms 4 and the bag-clamping mechanisms 5.

[0023] Reference Figure 1 and Figure 2 The driving motor 6 can be a torque motor, a servo motor or a hydraulic motor.

[0024] Reference Figure 1 and Figure 2 The mounting substrate 1 can be in any shape. The mounting substrate 1 has an annular channel 11. The annular channel 11 is a broad annular channel, including but not limited to annular structures such as a circular annular channel, an elliptical annular channel, and a square annular channel, and can be selected according to actual conditions.

[0025] Reference Figure 1 and Figure 2 Each bag-supporting mechanism 4 and each bag-clamping mechanism 5 are evenly arranged on the mounting base plate 1 around the annular channel 11. Each bag-supporting mechanism 4 and each bag-clamping mechanism 5 has a free end 14.

[0026] Reference Figure 1 and Figure 2 The free end 14 of each bag-stretching mechanism 4 is used to stretch the bag opening of the woven bag. The free end 14 of each bag-clamping mechanism 5 is used to clamp the bag opening of the woven bag. Each bag-clamping mechanism prevents the woven bag from moving or falling during the process of the free end 14 of each bag-stretching mechanism 4 stretching the bag opening. At the same time, the free end 14 of each bag-clamping mechanism 5 is also used to stretch the bag opening of the woven bag.

[0027] Reference Figure 2 , the driving motor 6 provides power for each bag-supporting mechanism 4 and each bag-clamping mechanism 5 to make rotational movement. Driven by the driving motor 6, the rotation angles of each bag-supporting mechanism 4 and each bag-clamping mechanism 5 are the same. By adjusting the output of the driving motor 6, the rotation angles of each bag-supporting mechanism 4 and each bag-clamping mechanism 5 can be adjusted. Based on this, the size of the annular structure formed by the free end 14 of each bag-supporting mechanism 4 and the free end 14 of each bag-clamping mechanism 5 can be adjusted. At this time, the annular structures of different sizes facilitate the opening of woven bags with different bag opening sizes. At the same time, when the output torque of the driving motor 6 reaches the set value, the free end 14 of each bag-supporting mechanism 4 and the free end 14 of each bag-clamping mechanism 5 are in close contact with the bag opening of the woven bag and maintain a stable state.

[0028] Reference Figure 2 The rotation directions of each bag-supporting mechanism 4 and each bag-clamping mechanism 5 can be consistent, that is, each bag-supporting mechanism 4 and each bag-clamping mechanism 5 can rotate in the clockwise direction or in the counterclockwise direction at the same time.

[0029] In one example, referring to Figure 1 and Figure 2 Each bag-stretching mechanism 4 and each bag-clamping mechanism 5 are arranged at intervals to make the bag opening smoothly stretched. The number of bag-stretching mechanisms 4 and bag-clamping mechanisms 5 can be determined according to the size of the annular channel 11 on the mounting substrate 1 and the shape of the bag opening to be stretched.

[0030] For example: Refer to Figure 1 and Figure 2 , the annular channel 11 provided on the above-mentioned mounting substrate 1 is a circular annular channel. The number of bag-stretching mechanisms 4 is 10, and the number of bag-clamping mechanisms 5 is 2. The 10 bag-stretching mechanisms 4 and the 2 bag-clamping mechanisms 5 are evenly arranged on the mounting substrate in a manner of surrounding the annular channel, and the 2 bag-clamping mechanisms 5 are symmetrical about the geometric center of the annular channel 11. Based on this structure, in the specific bag-stretching process of the above-mentioned bag-stretching device, the free end 14 of each bag-clamping mechanism 5 clamps the bag opening of the woven bag. The free end 14 of each bag-stretching mechanism 4 is inserted into the bag opening of the woven bag. The driving motor 6 drives each bag-stretching mechanism 4 and each bag-clamping mechanism 5 to rotate in the same direction. At this time, the free end 14 of each bag-stretching mechanism 4 and the free end 14 of each bag-clamping mechanism 5 rotate from the initial state to the stretched state to form an annular structure. The size of the annular structure can be changed by the rotation angle of each bag-stretching mechanism 4 and each bag-clamping mechanism 5. The above-mentioned annular structure can support woven bags with different bag opening sizes into a circular shape.

[0031] As can be seen from the above, refer to Figure 1 When the bag-supporting device is in an initial state, the free end 14 of each bag-supporting mechanism 4 and the free end 14 of each bag-clamping mechanism 5 are close to the geometric center of the annular channel 11 .

[0032] As can be seen from the above, refer to Figure 2 When the bag-supporting device is in the open state, the free end 14 of each bag-supporting mechanism 4 and the free end 14 of each bag-clamping mechanism 5 are away from the geometric center of the annular channel 11 .

[0033] For example: Refer to Figure 1 and Figure 2 Based on the structure of the above-mentioned bag-opening device, when the bag-opening device is in the initial state, the distance between the orthographic projection of the free end 14 of each bag-opening mechanism 4 on the mounting substrate 1 and the geometric center of the annular channel 11 is d11. When the bag-opening device is in the expanded state, the distance between the orthographic projection of the free end 14 of each bag-opening mechanism 4 on the mounting substrate 1 and the geometric center of the annular channel 11 is d21. At this time, d11<d21.

[0034] Accordingly, refer to Figure 1 and Figure 2 When the bag-opening device is in the initial state, the distance between the orthographic projection of the free end 14 of each bag-clamping mechanism 5 on the mounting substrate 1 and the geometric center of the annular channel 11 is d12. When the bag-opening device is in the open state, the distance between the orthographic projection of the free end 14 of each bag-clamping mechanism 5 on the mounting substrate 1 and the geometric center of the annular channel 11 is d22. At this time, d12<d22.

[0035] In one embodiment, referring to Figure 1 and Figure 2 The bag-holding device further comprises a plurality of first transmission members 7 which are transmission-connected to the driving motor 6. The plurality of first transmission members 7 are evenly arranged on the mounting base plate 1 around the annular channel 11. Each bag-holding mechanism 4 is arranged on a corresponding first transmission member 7. The driving motor 6 drives each bag-holding mechanism 4 to rotate in the same direction by driving each first transmission member 7. At this time, the free end 14 of each bag-holding mechanism 4 also rotates in the same direction. The free end 14 of each bag-holding mechanism 4 rotates from the initial state to the opened state.

[0036] Accordingly, refer to Figure 1 and Figure 2 , each bag clamping mechanism 5 is also arranged on the corresponding first transmission member 7. The driving motor 6 drives each bag clamping mechanism 5 to rotate in the same direction by driving each first transmission member 7. At this time, the free end 14 of each bag clamping mechanism 5 rotates in the same direction. The free end 14 of each bag clamping mechanism 5 rotates from the initial state to the expanded state.

[0037] In one example, referring to Figures 1 to 3 Each of the first transmission members 7 includes a first rotating shaft 71 and a first rotating wheel 72 disposed on the first rotating shaft 71. The first rotating shaft 71 is evenly disposed on the mounting substrate 1. The driving motor 6 is in transmission connection with each of the first rotating wheels 72.

[0038] In one example, referring to Figures 1 to 3 Each first rotating wheel 72 is connected to a corresponding bag-supporting mechanism 4 via a corresponding first rotating shaft 71. The driving motor 6 drives each bag-supporting mechanism 4 to rotate in the same direction by driving the first rotating wheels 72 connected to each bag-supporting mechanism 4.

[0039] Accordingly, refer to Figures 1 to 3 Each first rotating wheel 72 is connected to a corresponding bag clamping mechanism 5 through a corresponding first rotating shaft 71. The driving motor 6 drives each bag clamping mechanism 5 to rotate in the same direction by driving the first rotating wheel 72 connected to each bag clamping mechanism 5.

[0040] In one example, referring to Figures 1 to 3 The first rotating wheel 72 may be a sprocket wheel, and each of the first rotating wheels 72 is connected by a chain transmission, so that each of the first transmission members 7 is connected by transmission. At this time, each of the bag support mechanisms 4 and each of the bag clamping mechanisms 5 are connected by transmission.

[0041] In one example, referring to Figures 1 to 3 The first rotating wheel 72 may be a pulley, and each first rotating wheel 72 is connected to each other by a transmission belt, so that each first transmission member 7 is connected to each other by transmission. At this time, each bag support mechanism 4 and each bag clamping mechanism 5 are connected to each other by transmission.

[0042] It can be understood that the first rotating wheel 72 may also be other structures, which is not specifically limited in the embodiment of the present invention.

[0043] In one embodiment, referring to Figures 1 to 4 In order to make each first transmission member 7 rotate in the same direction, the bag-supporting device further includes a plurality of second transmission members 9. The plurality of second transmission members 9 are evenly arranged on the mounting base plate 1 around the annular channel 11. Each second transmission member 9 is arranged between two adjacent first transmission members 7. Each second transmission member 9 is connected to the adjacent first transmission member 7 by a cross transmission mode.

[0044] In one example, referring to Figure 5 Each of the second transmission members 9 includes a second rotating shaft 91 and a second rotating wheel 92 disposed on the second rotating shaft 91. The second rotating shaft 91 is evenly disposed on the mounting substrate 1. The driving motor 6 is in transmission connection with each of the second rotating wheels 92. The second rotating wheels 92 included in each of the second transmission members 9 are in transmission connection with the first rotating wheels 72 included in two adjacent first transmission members 7 in a cross transmission manner.

[0045] As can be seen from the above, refer to Figure 5 , each second rotating wheel 92 is disposed between two adjacent first rotating wheels 72, and is simultaneously in transmission connection with the two adjacent first rotating wheels 72. At this time, the first rotating wheel 72 adjacent to the second rotating wheel 92 drives the second rotating wheel 92 to move. At this time, the second rotating wheel 92 acts as a driving wheel to drive the next first rotating wheel 72 adjacent thereto to move. In this way, the two first rotating wheels 72 adjacent to the second rotating wheel 92 rotate in the same direction.

[0046] In one example, referring to Figure 5 , the first rotating wheel 72 and the second rotating wheel 92 can both be sprocket wheels. At this time, the adjacent first rotating wheels 72 and the second rotating wheels 92 are connected by a chain in a cross transmission mode. Each second rotating wheel 92 is meshed and connected with two adjacent first rotating wheels 72 through a chain. The previous first rotating wheel 72 adjacent to the second rotating wheel 92 moves in a clockwise direction. The chain meshed and connected with the previous first rotating wheel 72 drives the second rotating wheel 92 to move in a counterclockwise direction. At this time, the second rotating wheel 92, as a driving wheel, drives the next first rotating wheel 72 adjacent to it to move in a clockwise direction through a chain. In this way, the two first rotating wheels 72 adjacent to the second rotating wheel 92 will both rotate and move in a clockwise direction. At this time, the rotation directions of the first transmission members 7 are the same. In this way, the rotation directions of the bag-supporting mechanisms 4 and the bag-clamping mechanisms 5 connected to the first transmission members 7 can be the same.

[0047] In one example, referring to Figure 5, the first rotating wheel 72 and the second rotating wheel 92 can both be pulleys. At this time, the adjacent first rotating wheels 72 and the second rotating wheels 92 are connected by a conveyor belt in a cross transmission mode. Each second rotating wheel 92 is slidably connected to two adjacent first rotating wheels 72 through a conveyor belt. The previous first rotating wheel 72 adjacent to the second rotating wheel 92 rotates in the counterclockwise direction. The transmission belt slidably connected to the previous first rotating wheel 72 drives the second rotating wheel 92 to move in the clockwise direction. At this time, the second rotating wheel 92, as a driving wheel, drives the next first rotating wheel 72 adjacent to it to move in the counterclockwise direction through the transmission belt. In this way, the two first rotating wheels 72 adjacent to the second rotating wheel 92 will both rotate in the counterclockwise direction. At this time, the rotation directions of the first transmission members 7 are the same. In this way, the rotation directions of the bag support mechanisms 4 and the bag clamping mechanisms 5 connected to the first transmission members 7 can be the same.

[0048] It can be understood that the second rotating wheel 92 may also be other structures, and the embodiment of the present invention does not specifically limit this.

[0049] In one embodiment, referring to Figure 6 The bag-supporting device further includes a third rotating wheel 8.

[0050] In one example, referring to Figures 1 to 6 The third rotating wheel 8 is arranged on the first rotating shaft 71 of one of the first transmission members 7. The third rotating wheel 8 is transmission-connected with the first rotating wheel 72 on the first transmission member 7. At this time, the third rotating wheel 8 is directly transmission-connected with the driving motor 6.

[0051] Reference Figures 1 to 6 , the driving motor 6 drives the first rotating wheel 72 connected to the third rotating wheel 8 to move. The first rotating wheel 72 drives the first transmission member 7 where it is located to move. At this time, all the first transmission members 7 that are connected to each other rotate in the same direction together. Each first transmission member 7 drives the free end 14 of each bag-opening mechanism 4 connected thereto to rotate from the initial state to the open state.

[0052] Accordingly, refer to Figures 1 to 6 The driving motor 6 drives the third rotating wheel 8, so that the first transmission member 7 drives the free ends 14 of each bag clamping mechanism 5 connected thereto to rotate from the initial state to the expanded state.

[0053] In one example, according to Figures 1 to 5 , the third rotating wheel 8 can also be arranged on the second rotating shaft 91 of one of the second transmission members 9. The third rotating wheel is in transmission connection with the second rotating wheel 92 on the second transmission member 9. At this time, the principle of the third rotating wheel 8 being arranged on the second transmission member 9 is the same as the principle of the third rotating wheel 8 being arranged on the first transmission member 7, which will not be described in detail here.

[0054] In one example, referring to Figure 1 , Figure 2 and Figure 7 Each of the bag-supporting mechanisms 4 includes a first swing rod 41 and a support rod 42 disposed at the end of the first swing rod 41. Each support rod 42 is disposed at the free end 14 of each bag-supporting mechanism 4, and is used to extend into the bag opening of the woven bag, and after the free end 14 of each bag-supporting mechanism 4 rotates from the initial state to the open state, the bag opening of the woven bag is opened.

[0055] In one example, referring to Figure 1 , Figure 2 and Figure 7 , the first swing rods 41 are arranged on the corresponding first transmission members 7. The driving motor 6 drives each first transmission member 7 to drive each first swing rod 41 connected thereto to rotate in the same direction. At this time, each first swing rod drives each support rod 42 to rotate in the same direction. In this way, each support rod 42 can rotate in the same direction from the initial state to the expanded state.

[0056] In one example, referring to Figure 6 In order to facilitate the end of each support rod 42 to extend into the bag opening of the woven bag, the end of each support rod 42 may have a chamfered structure. In order to increase the friction between each support rod 42 and the woven bag, each support rod 42 may have a rubber-covered section arranged at intervals.

[0057] It can be understood that in order to facilitate insertion into the bag opening of the woven bag and increase the friction between each support rod 42 and the woven bag, the above-mentioned support rods 42 can also adopt other structures, and the embodiment of the present invention does not specifically limit this.

[0058] In one example, referring to Figure 7 Each first swing rod 41 is perpendicular to each support rod 42, so that each support rod 42 can smoothly open the bag opening of the woven bag during the process of rotating in the same direction from the initial state to the open state.

[0059] In one example, referring to Figure 1 , Figure 2 and Figure 7 , each first swing rod 41 is provided with a first groove 411 for matching with the free end 14 of each adjacent bag-supporting mechanism 4 or the free end 14 of each bag-clamping mechanism 5. When the above-mentioned bag-supporting device is in the open state. The free end 14 of each bag-supporting mechanism 4 or the free end 14 of each bag-clamping mechanism 5 is clamped in the first groove 411 of each adjacent first swing rod 41. The free end 14 of each bag-supporting mechanism 4 and the free end 14 of each bag-clamping mechanism 5 can be rotated to a larger angle. At this time, the annular structure formed by the free end 14 of each bag-supporting mechanism 4 and the free end 14 of each bag-clamping mechanism 5 is larger. In this way, the bag mouth of the woven bag can be supported larger.

[0060] In one example, referring to Figure 1 , Figure 2 and Figure 8 Each of the bag clamping mechanisms 5 comprises a second swing rod 51 and an air clamp 52 disposed at the end of the second swing rod 51. Each air clamp 52 is disposed at the free end 14 of each bag clamping mechanism 5. Each air clamp 52 has a clip 521 at the end thereof, and each clip 521 is used to clamp the bag opening of the woven bag and to open the bag opening of the woven bag.

[0061] In one example, referring to Figure 1 , Figure 2 and Figure 8 , each second swing rod 51 is arranged on the corresponding first transmission member 7. The driving motor 6 drives each first transmission member 7 to drive each second swing rod 51 to rotate in the same direction. At this time, each second swing rod 51 drives each air clamp 52 to rotate in the same direction.

[0062] In one example, referring to Figure 8 , each air clamp 52 is rotatably connected to each second swing rod 51. Specifically, each air clamp 52 can be rotatably connected to each second swing rod 51 through a bearing seat. Each air clamp 52 is kept relatively non-rotatable with respect to the horizontal plane. In this way, it can be avoided that when each bag clamping mechanism 5 opens the bag mouth of the woven bag, the woven bag and each air clamp 52 are entangled and cannot be separated.

[0063] For example: Refer to Figure 1 , Figure 2 and Figure 8 , each of the bag clamping mechanisms 5 further comprises a plurality of synchronous pulley assemblies. Each air clamp 52 is connected to each of the first transmission members 7 through each synchronous pulley assembly. Each synchronous pulley assembly comprises a driving wheel 12 and a driven wheel 13 connected in power. Each driving wheel 12 is connected to each of the first rotating shafts 71 in each of the first transmission members 7. Each driven wheel 13 is connected to each of the air clamps 52 through a third rotating shaft 10. The third rotating shaft 10 is arranged in a bearing seat connecting each of the air clamps 52 and each of the second swing rods 51. The driving motor 6 drives each of the first transmission members 7 to drive each of the synchronous pulley assemblies to move. During the rotational movement of each of the bag clamping mechanisms 5, each of the air clamps 52 rotates relative to the second swing rod 51. Each of the air clamps 52 always maintains a relatively non-rotating state with the horizontal plane. In this way, it can be avoided that in the process of each of the bag clamping mechanisms 5 opening the bag mouth of the woven bag, the woven bag and each of the air clamps 52 are entangled and cannot be separated.

[0064] In one example, referring to Figure 8 Each second swing rod 51 is perpendicular to each air clamp 52, so that each air clamp 52 can smoothly open the bag opening of the woven bag during the process of rotating in the same direction from the initial state to the expanded state.

[0065] In one example, referring to Figure 2 and Figure 8 , each second swing rod 51 is provided with a second groove 511 for matching with the free end 14 of each adjacent bag-supporting mechanism 4 or the free end 14 of each bag-clamping mechanism 5. When the above-mentioned bag-supporting device is in the open state, the free end 14 of each bag-supporting mechanism 4 or the free end 14 of each bag-clamping mechanism 5 is clamped at the second groove 511 of each adjacent second swing rod 51. At this time, the free end 14 of each bag-supporting mechanism 4 and each bag-clamping mechanism 5 rotates to a larger angle. The annular structure formed by the free end 14 of each bag-supporting mechanism 4 and the free end 14 of each bag-clamping mechanism 5 is larger. In this way, the bag mouth of the woven bag can be supported larger.

[0066] In one embodiment, referring to Figure 1 and Figure 2 The bag-supporting device further includes a base 2 and a protective cover 3 having an annular channel. The base 2 is fixedly disposed at the end of the mounting substrate 1 and is used to fix the drive motor 6. The protective cover 3 is disposed on the mounting substrate 1, and the protective cover 3 is disposed in the circumference of the annular channel 11. The protective cover 3 is used to encapsulate a plurality of first transmission members 7 and a plurality of second transmission members 9 disposed around the annular channel 11 on the mounting substrate 1.

[0067] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0068] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A bag-supporting device, characterized in that: include: A mounting base, a plurality of bag-supporting mechanisms for supporting the bag, a plurality of bag-clamping mechanisms for clamping the bag opening, and a driving motor for providing rotational torque to the bag-supporting mechanisms and the bag-clamping mechanisms; the mounting base has an annular channel, each of the bag-supporting mechanisms and each of the bag-clamping mechanisms are arranged on the mounting base around the annular channel; each of the bag-supporting mechanisms and each of the bag-clamping mechanisms has a free end; When the bag-holding device is in an initial state, the distance between the orthographic projection of the free end of each bag-holding mechanism on the mounting substrate and the geometric center of the annular channel is d11; when the bag-holding device is in an open state, the distance between the orthographic projection of the free end of each bag-holding mechanism on the mounting substrate and the geometric center of the annular channel is d21, d11<d21; When the bag-holding device is in an initial state, the distance between the free end of each bag-clamping mechanism on the orthographic projection of the mounting substrate and the geometric center of the annular channel is d12; when the bag-holding device is in an expanded state, the distance between the free end of each bag-clamping mechanism on the orthographic projection of the mounting substrate and the geometric center of the annular channel is d22, d12<d22.

2. The bag-opening device according to claim 1, characterized in that: The bag-holding device also includes a plurality of first transmission members connected to the driving motor in transmission mode; the plurality of first transmission members are arranged on the mounting base plate around the annular channel; each of the bag-holding mechanisms is arranged on a corresponding first transmission member; and each of the bag-clamping mechanisms is arranged on a corresponding first transmission member.

3. The bag-opening device according to claim 2, characterized in that: Each of the first transmission members includes a first rotating shaft and a first rotating wheel arranged on the first rotating shaft; the driving motor is in transmission connection with a plurality of the first rotating wheels; the first rotating shaft is arranged on the mounting base plate; and the first rotating wheel is a sprocket or a belt wheel.

4. The bag-opening device according to claim 2, characterized in that: The bag-supporting device further comprises a third rotating wheel, and the third rotating wheel is arranged on one of the first transmission members; the driving motor is drivingly connected to the first transmission member where the third rotating wheel is located via the third rotating wheel.

5. The bag-opening device according to claim 2, characterized in that: Each of the bag-supporting mechanisms comprises a first swing rod and a support rod provided at the end of the first swing rod, wherein the first swing rod is provided on the corresponding first transmission member; wherein the first swing rod and the support rod are perpendicular to each other; The first swing rod is provided with a first groove for cooperating with the free end of the adjacent bag-supporting mechanism or the bag-clamping mechanism.

6. The bag-opening device according to claim 2, characterized in that: Each of the bag clamping mechanisms comprises a second swing rod and an air clamp disposed at the end of the second swing rod; the air clamp is rotatably connected to the second swing rod, the second swing rod is disposed on the corresponding first transmission member; the second swing rod and the air clamp are perpendicular to each other; The second swing rod is provided with a second groove for cooperating with the free end of the adjacent bag-supporting mechanism or the bag-clamping mechanism.

7. The bag-opening device according to claim 2, characterized in that: The bag-holding device also includes a plurality of second transmission members, which are arranged on the mounting base plate around the annular channel; each of the second transmission members is arranged between two adjacent first transmission members; and each of the second transmission members is connected to the adjacent first transmission members in a cross transmission manner.

8. The bag-opening device according to claim 7, characterized in that: Each of the second transmission members includes a second rotating shaft and a second rotating wheel arranged on the second rotating shaft; the driving motor is connected to the plurality of second rotating wheels in transmission, and the second rotating wheel included in each of the second transmission members is connected to the adjacent first transmission member in a cross-transmission manner, and the second rotating shaft is arranged on the mounting base plate; the second rotating wheel is a sprocket or a pulley.

9. The bag-opening device according to claim 7, characterized in that: The bag-supporting device further comprises a third rotating wheel, and the third rotating wheel is arranged on one of the second transmission members; the driving motor is transmission-connected to the second transmission member where the third rotating wheel is located via the third rotating wheel.

10. The bag-opening device according to any one of claims 1 to 9, characterized in that: The bag-supporting device also includes a base and a protective cover with an annular channel; the base is fixedly arranged at the end of the mounting base, and the drive motor is fixedly arranged on the base; the protective cover is arranged on the mounting base, and the protective cover is arranged in the circumferential direction of the annular channel.

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