An alternating opening and closing feeding mechanism

Abstract

An alternating opening and closing feeding mechanism belongs to the technical field of packaging equipment. It includes a Geneva wheel having a groove body around its rotation axis, and a plurality of alternately arranged wave crest segments and wave trough segments are provided on the inner wall of the groove body; an opening and closing structure adapted to be opened or closed within a certain angle range under the drive of an external force; and a transmission device arranged on the frame and located on one side of the Geneva wheel, with one end acting on the opening and closing structure and the other end acting on the Geneva wheel. The movable end of the transmission device of the present invention extends into the groove body of the Geneva wheel. When the Geneva wheel rotates, the movable end of the transmission device sequentially passes through the alternately arranged wave crest segments and wave trough segments, so that the movable end drives the rotating shaft of the transmission device to rotate reciprocally, and further the connecting end of the transmission device drives the opening and closing structure to open and close alternately. Therefore, the present invention realizes the alternating opening and closing of the opening and closing structure only through a mechanical structure, and will not generate signal delays caused by an electrical control system, resulting in the situation that the opening and closing structure is not opened or closed in time.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and particularly relates to an alternately opening and closing feeding mechanism. Background Art

[0002] In the prior art, a bag arranging machine for changing a vertically falling packaging bag into a horizontal state for stacking is provided with a rotatable rotating shaft on a frame, and a blade structure provided on the rotating shaft and rotating around the rotating shaft. The rotating shaft is perpendicular to the falling direction of the packaging bag. The blade structure has a plurality of claws, and the accommodating space between two adjacent claws is used to accommodate the falling packaging bag. When the packaging bag falls, the packaging bag is accommodated in the accommodating space between two adjacent claws. While the blade structure rotates, the packaging bag is changed from the original vertical state to a horizontal state. After the blade structure continues to rotate, the packaging bag is placed into the stacking space. In order to enable the packaging bag to smoothly fall into the corresponding accommodating space and not fall on the claws, in the prior art, an opening and closing structure adapted for the packaging bag to pass through is provided above the bag arranging machine, which includes a guiding plate and an opening and closing plate driven to rotate towards or away from the guiding plate, and the opening and closing plate intermittently moves away from the guiding plate, so that the packaging bag intermittently passes between the guiding plate and the opening and closing plate and falls into the accommodating space between two claws. However, in the prior art, the expansion and contraction of a telescopic cylinder or the intermittent rotation of a motor are controlled by an electrical control system to make the opening and closing plate intermittently move away from the guiding plate, that is, the interval time and frequency of the opening state and the closing state of the opening and closing structure are controlled by the electrical control system. However, when the opening and closing plate rotates at a high frequency, this method will have a situation where the opening or closing is not timely, resulting in the packaging bag being unable to smoothly fall into the corresponding accommodating space, and thus a phenomenon of stuck bags occurs. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that when the opening and closing plate of the opening and closing structure in the prior art rotates at a high frequency, the method of controlling the interval time and frequency of the opening state and the closing state of the opening and closing structure by an electrical control system will have a situation where the opening or closing is not timely, so as to provide an alternately opening and closing feeding mechanism.

[0004] The present invention provides the following technical solutions:

[0005] An alternately opening and closing feeding mechanism, comprising:

[0006] A frame;

[0007] A Geneva wheel, driven to be arranged on the frame and capable of rotating relative to the frame. The Geneva wheel has a groove body around its rotation axis, and several alternately arranged wave crest sections and wave trough sections are provided on the inner wall of the groove body. The distance from the wave trough section to the rotation axis is less than the distance from the wave crest section to the rotation axis;

[0008] An opening and closing structure, which is arranged on the frame and is adapted to be opened or closed within a certain angle range under the drive of an external force;

[0009] A transmission device, which is arranged on the frame and is located on one side of the grooved pulley. One end of the transmission device acts on the opening and closing structure, and the other end acts on the grooved pulley. The transmission device includes:

[0010] A rotating shaft, which is arranged on the frame;

[0011] A movable end, one end of which is connected to one end of the rotating shaft, and the other end extends into the groove body. When the grooved pulley rotates, the movable end is driven by the groove body to drive the rotating shaft to rotate;

[0012] A connecting end, which is connected to the other end of the rotating shaft, and the opening and closing structure is connected to the connecting end.

[0013] Optionally, the transmission device further includes:

[0014] A first swing rod, which is arranged at one end of the rotating shaft facing the grooved pulley, and the first swing rod is provided with a connecting piece adapted to connect to the groove body;

[0015] A second swing rod, which is arranged at one end of the rotating shaft away from the grooved pulley, and the second swing rod is adapted to connect to the opening and closing structure;

[0016] When the grooved pulley rotates, the groove body drives the connecting piece to move, so that the first swing rod drives the rotating shaft and the second swing rod to rotate, and the second swing rod rotates to drive the opening and closing structure to open or close.

[0017] Optionally, the transmission device further includes:

[0018] A first connecting rod and a second connecting rod which are hinged together. The first connecting rod is hinged to the second swing rod, and the second connecting rod is adapted to connect to the opening and closing structure;

[0019] When the grooved pulley rotates, the second swing rod drives the first connecting rod to move, so that the first connecting rod drives the second connecting rod to rotate, to drive the opening and closing structure to open or close.

[0020] Optionally, the connecting piece includes:

[0021] A cam bearing, which is detachably connected to the first swing rod, and one end of the cam bearing with a bearing is located in the groove body.

[0022] Optionally, the included angle between the first swing rod and the second swing rod is 80° - 100°.

[0023] Optionally, the length of the second swing rod is greater than the length of the first swing rod.

[0024] Optionally, the opening and closing structure includes:

[0025] A guiding plate;

[0026] An opening and closing plate that is driven by the transmission device to move towards or away from the guiding plate, and when the opening and closing plate moves away from the guiding plate, a passage suitable for articles to pass through is formed between the opening and closing plate and the guiding plate.

[0027] Optionally, the opening and closing structure further includes:

[0028] A mounting shaft for setting the opening and closing plate;

[0029] The transmission device is connected to the mounting shaft and is adapted to drive the mounting shaft to rotate so that the opening and closing plate moves towards or away from the guiding plate.

[0030] Optionally, the alternating opening and closing feeding mechanism is used for a bag arranging machine.

[0031] The technical solution of the present invention has the following advantages:

[0032] 1. The alternating opening and closing feeding mechanism provided by the present invention includes a frame; a Geneva wheel that is driven and arranged on the frame and can rotate relative to the frame, the Geneva wheel has a groove body around its rotation axis, and there are a number of alternately arranged wave crest segments and wave trough segments on the inner wall of the groove body, and the distance from the wave trough segment to the rotation axis is less than the distance from the wave crest segment to the rotation axis; an opening and closing structure that is arranged on the frame and is adapted to be opened or closed within a certain angle range under the drive of an external force; a transmission device that is arranged on the frame and is located on one side of the Geneva wheel, one end of which acts on the opening and closing structure and the other end acts on the Geneva wheel, and the transmission device includes: a rotating shaft arranged on the frame; a movable end, one end of which is connected to one end of the rotating shaft and the other end extends into the groove body, and when the Geneva wheel rotates, it is driven by the groove body to drive the rotating shaft to rotate; a connecting end connected to the other end of the rotating shaft, and the opening and closing structure is connected to the connecting end.

[0033] The present invention provides a Geneva wheel, an opening and closing structure and a transmission device. The movable end of the transmission device extends into the groove body of the Geneva wheel. When the Geneva wheel rotates, the movable end of the transmission device sequentially passes through the alternately arranged wave crest segments and wave trough segments, so that the movable end drives the rotating shaft of the transmission device to rotate reciprocally, and further drives the connecting end of the transmission device to drive the opening and closing structure to open and close alternately. Therefore, the present invention realizes the alternating opening and closing of the opening and closing structure only through a mechanical structure, replacing the electrical control system in the prior art. Therefore, there will be no signal delay caused by the electrical control system, resulting in the situation that the opening and closing structure fails to open or close in time.

[0034] 2. The alternating opening and closing feeding mechanism provided by the present invention, the transmission device further includes a first swing rod disposed at one end of the rotating shaft facing the sprocket wheel, and the first swing rod is provided with a connecting member adapted to connect to the groove body; a second swing rod disposed at the end of the rotating shaft away from the sprocket wheel, and the second swing rod is adapted to connect to the opening and closing structure; when the sprocket wheel rotates, the groove body drives the connecting member to move, so that the first swing rod drives the rotating shaft and the second swing rod to rotate, and the second swing rod rotates to drive the opening and closing structure to open or close.

[0035] The transmission device of the present invention further includes a first swing rod disposed at one end of the rotating shaft facing the sprocket wheel. The first swing rod forms the movable end of the transmission device, and the connecting member provided thereon is inserted into the groove body of the sprocket wheel, so that the first swing rod can drive the rotating shaft to rotate as the sprocket wheel rotates. The transmission device further includes a second swing rod disposed at the end of the rotating shaft away from the sprocket wheel. The second swing rod forms the connecting end of the transmission device, and it rotates around the rotating shaft driven by the rotating shaft to drive the opening and closing structure to open or close, so as to realize that the rotation of the sprocket wheel can drive the transmission device to drive the opening and closing structure to open or close.

[0036] 3. The alternating opening and closing feeding mechanism provided by the present invention, the transmission device further includes a first connecting rod and a second connecting rod hinged to each other. The first connecting rod is hinged to the second swing rod, and the second connecting rod is adapted to connect to the opening and closing structure; when the sprocket wheel rotates, the second swing rod drives the first connecting rod to move, so that the first connecting rod drives the second connecting rod to rotate to drive the opening and closing structure to open or close.

[0037] The transmission device of the present invention further includes a first connecting rod and a second connecting rod hinged to each other. When the sprocket wheel rotates, the second swing rod drives the first connecting rod to move, so that the first connecting rod drives the second connecting rod to rotate to drive the opening and closing structure to open or close. By providing the first connecting rod and the second connecting rod, the distance between the opening and closing structure and the second swing rod is increased, that is, the distances between the opening and closing structure and the rotating shaft, and between the opening and closing structure and the sprocket wheel are increased, thereby increasing the distance range during the installation of the sprocket wheel and the opening and closing structure, and avoiding interference between the sprocket wheel and the opening and closing structure and other mechanical structures due to distance limitations.

[0038] 4. The alternating opening and closing feeding mechanism provided by the present invention, the connecting member includes a cam bearing detachably connected to the first swing rod, and one end of the cam bearing with a bearing is located in the groove body.

[0039] The connecting member of the present invention includes a cam bearing, and one end of it with a bearing is located in the groove body. When the sprocket wheel rotates, the bearing contacts the inner wall of the groove body to generate rotation, thereby reducing friction, avoiding the loss of the power of the sprocket wheel rotation due to friction, and avoiding damage caused by the friction between the connecting member and the groove body.

[0040] 5. The alternating opening and closing feeding mechanism provided by the present invention, wherein the length of the second swing rod is greater than that of the first swing rod.

[0041] In the present invention, the length of the second swing rod is greater than that of the first swing rod to amplify the amplitude of the grooved pulley, so that a small-angle rotation of the rotating shaft can meet the dimensional requirements of the opening and closing structure channel. At the same time, the difference between the distance of the trough section from the rotation axis and the distance of the crest section from the rotation axis is small, thereby reducing the size of the grooved pulley, and further reducing the production difficulty and weight of the present invention.

[0042] 6. The alternating opening and closing feeding mechanism provided by the present invention, wherein the opening and closing structure includes a guide plate; an opening and closing plate that moves towards or away from the guide plate driven by the transmission device, and when the opening and closing plate moves away from the guide plate, a channel suitable for articles to pass through is formed between the opening and closing plate and the guide plate.

[0043] A channel suitable for articles to pass through is formed between the guide plate and the opening and closing plate of the present invention. The opening and closing plate is driven by the transmission device to move towards or away from the guide plate to realize the opening and closing of the opening and closing structure.

[0044] 7. The alternating opening and closing feeding mechanism provided by the present invention, wherein the opening and closing structure further includes a mounting shaft for setting the opening and closing plate; the transmission device is connected to the mounting shaft and is adapted to drive the mounting shaft to rotate so that the opening and closing plate moves towards or away from the guide plate.

[0045] In the present invention, the mounting shaft is provided to be suitable for mounting the opening and closing plate. The transmission device is connected to the mounting shaft and drives the mounting shaft to rotate, which can realize the opening and closing of the opening and closing structure, and the installation difficulty is lower compared with the case where the transmission device is connected to the opening and closing plate.

[0046] 8. The alternating opening and closing feeding mechanism provided by the present invention, wherein the alternating opening and closing feeding mechanism is used for a bag arranging machine.

[0047] The alternating opening and closing feeding mechanism of the present invention is used for a bag arranging machine. The opening and closing structure is driven to open and close by a grooved pulley, so that articles can pass through the opening and closing structure accurately and in time and reach the corresponding accommodating space, avoiding the situation of bag jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following will briefly introduce the drawings required to be used in the specific embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0050] Figure 2 It is the front view of the Geneva wheel provided in Embodiment 1 of the present invention;

[0051] Figure 3 It is the front view of the blade structure provided in Embodiment 1 of the present invention.

[0052] Explanation of reference numerals:

[0053] 1. Geneva wheel; 2. Groove body; 3. Crest section; 4. Trough section; 5. Rotating shaft; 6. First swing rod; 7. Connecting piece; 8. Second swing rod; 9. First connecting rod; 10. Second connecting rod; 11. Transmission device; 12. Guide plate; 13. Opening and closing plate; 14. Mounting shaft; 15. Frame; 16. Claw; 17. Rotating shaft; 18. Accommodating space. Detailed implementation manners

[0054] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0055] In the description of the present invention, it should be noted that the terms "first" and "second" are only used for distinction and cannot be understood as indicating or implying relative importance.

[0056] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0057] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0058] Embodiment 1

[0059] This embodiment provides an alternating opening and closing feeding mechanism, preferably used for a bag arranging machine. Of course, in other embodiments, it can also be a transportation device provided with a conveyor belt; as Figures 1-3 shown, this embodiment includes

[0060] The rack 15. Preferably, the rack 15 of this embodiment is adapted to be provided with a rotatable rotating shaft 17. A plurality of blade structures are provided on the rotating shaft 17, and the plurality of blade structures are arranged along the axial direction of the rotating shaft 17. The blade structure has a plurality of claws 16. The accommodation space 18 between two adjacent claws 16 is used to accommodate the falling articles, that is, the packaging bags. In this embodiment, the rack 15 is provided with a space adapted to accommodate the plurality of blade structures on the rotating shaft 17.

[0061] The Geneva wheel 1 is driven and arranged on the rack 15 and can rotate relative to the rack 15. The Geneva wheel 1 has a groove body 2 around its rotation axis. A plurality of alternately arranged wave crest segments 3 and wave trough segments 4 are provided on the inner wall of the groove body 2. The distance from the wave trough segment 4 to the rotation axis is less than the distance from the wave crest segment 3 to the rotation axis. The number of the wave crest segments 3 and the wave trough segments 4 determines the number of times the opening and closing structure performs the opening and closing actions when the Geneva wheel 1 rotates one week. Preferably, both the wave crest segment 3 and the wave trough segment 4 of this embodiment are set to three. The angle of the wave crest segment 3, that is, Figure 2 the α angle in, determines the duration of the closing action of the opening and closing structure. The angle of the wave trough segment 4, that is, Figure 2 the β angle in, determines the duration of the opening action of the opening and closing structure. The difference between the distance from the wave trough segment 4 to the rotation axis and the distance from the wave crest segment 3 to the rotation axis is the amplitude of the Geneva wheel 1, which determines the opening amplitude of the opening and closing structure and can avoid the impact between the guide plate 12 and the opening and closing plate 13, thereby causing damage or noise. In this embodiment, both the wave crest segment 3 and the wave trough segment 4 adopt involute curves to enable the connecting member 7 to move smoothly in the groove body 2. The driving structure of the Geneva wheel 1 in this embodiment is not limited. Preferably, the Geneva wheel 1 is arranged on the corresponding rotating shaft 17 and rotates synchronously with the rotation of the rotating shaft 17. By setting the shapes of the wave crest segment 3 and the wave trough segment 4, the opening and closing structure can be opened corresponding to the accommodation space 18, so that the packaging bag directly falls into the corresponding accommodation space 18 after passing through the opening and closing structure, thereby completing the bag arranging action. Of course, in other embodiments, the Geneva wheel 1 can also be rotatably connected to the rack 15, and the Geneva wheel 1 is directly driven to rotate by a rotating motor; or a gear transmission group is used to connect the Geneva wheel 1 and the rotating shaft 17 to change the transmission ratio; or the Geneva wheel 1 is rotated manually.

[0062] An opening and closing structure is provided on the frame 15 and is adapted to be opened or closed within a certain angle range under the drive of an external force. The specific structure of the opening and closing structure is not limited in this embodiment. Preferably, the opening and closing structures in this embodiment are provided in one-to-one correspondence with the rotating shafts 17, and the opening and closing structures are located above the corresponding blade structures. It includes a guide plate 12 fixedly installed on the frame 15 through a bracket; a mounting shaft 14 rotatably arranged on the frame 15 through a bearing; an opening and closing plate 13 fixedly connected to the mounting shaft 14 and extending along the axial direction of the mounting shaft 14. The opening and closing plate 13 is arranged on the side of the mounting shaft 14 facing the corresponding blade structure. A transmission device 11 is connected to the mounting shaft 14 and is adapted to drive the mounting shaft 14 to rotate, so that the opening and closing plate 13 moves towards or away from the guide plate 12. And when the opening and closing plate 13 moves away from the guide plate 12, a passage suitable for an article, that is, a packaging bag, to pass through is formed between the opening and closing plate 13 and the guide plate 12, so as to realize the opening and closing action of the opening and closing structure. Of course, in other embodiments, the transmission device 11 can also hinge the end of the opening and closing plate 13 different from the end connected to the mounting shaft 14, so that the transmission device 11 drives the opening and closing plate 13 to rotate around the mounting shaft 14 to realize the opening and closing action of the opening and closing structure. Of course, in other embodiments, the mounting shaft 14 can also be not provided. A convex shaft is provided at the end of the opening and closing plate 13 facing the frame 15 and is rotatably connected to the frame 15. A slide rail can also be provided on the frame 15, and the opening and closing plate 13 is slidably connected to the slide rail and moves along the slide rail under the drive of the transmission device 11.

[0063] The transmission device 11 is provided on the frame 15 and is located on one side of the sprocket 1. One end of it acts on the opening and closing structure, and the other end acts on the sprocket 1. The transmission device 11 includes a rotating shaft 5 provided on the frame 15, a movable end, one end of which is connected to one end of the rotating shaft 5, and the other end extends into the groove body 2 and is driven by the groove body 2 to drive the rotating shaft 5 to rotate when the sprocket 1 rotates, and a connecting end connected to the other end of the rotating shaft 5. The opening and closing structure is connected to the connecting end.

[0064] This embodiment does not limit the specific structure of the transmission device 11. Preferably, the transmission device 11 of this embodiment further includes a first swing rod 6, a second swing rod 8, and a first connecting rod 9 and a second connecting rod 10 that are hinged to each other. The first swing rod 6 is arranged at one end of the rotating shaft 5 facing the sprocket wheel 1, and the first swing rod 6 is provided with a connecting member 7 adapted to connect to the groove body 2. The second swing rod 8 is arranged at the end of the rotating shaft 5 away from the sprocket wheel 1. The first connecting rod 9 is hinged to the second swing rod 8, and the second connecting rod 10 is connected to the mounting shaft 14 to drive the mounting shaft 14 and the opening and closing plate 13 to rotate, so as to open or close the opening and closing structure. When the sprocket wheel 1 rotates, the groove body 2 drives the connecting member 7 to move, so that the first swing rod 6 drives the rotating shaft 5 and the second swing rod 8 to rotate. The second swing rod 8 rotates to drive the first connecting rod 9 to move, so that the first connecting rod 9 drives the second connecting rod 10 to rotate to drive the opening and closing structure to open or close, as Figure 1 shown. When the connecting member 7 moves from the trough section 4 to the peak section 3 in the groove body 2, the first swing rod 6 rotates in a direction away from the axis of the rotating shaft of the sprocket wheel 1, thereby driving the rotating shaft 5 to rotate and driving the second swing rod 8 to rotate in the direction of the opening and closing structure. The first connecting rod 9 moves in a direction away from the rotating shaft 5 under the driving action of the second swing rod 8, and then pushes the second connecting rod 10 to drive the mounting shaft 14 to rotate, so that the opening and closing plate 13 moves towards the guide plate 12, causing the opening and closing structure to close. When the sprocket wheel 1 continues to rotate, the connecting member 7 moves from the peak section 3 to the trough section 4 in the groove body 2, opening the opening and closing structure; of course, in other embodiments, the first connecting rod 9 and the second connecting rod 10 may not be provided, and the end of the second swing rod 8 different from the end connecting to the rotating shaft 5 is directly hinged to the opening and closing plate 13 to drive the opening and closing plate 13 to rotate around the axis of the mounting shaft 14. When the sprocket wheel 1 rotates, the groove body 2 drives the connecting member 7 to move, so that the first swing rod 6 drives the rotating shaft 5 and the second swing rod 8 to rotate. The second swing rod 8 rotates to drive the opening and closing structure to open or close; of course, in other embodiments, the first swing rod 6 and the second swing rod 8 may not be provided, and a straight rod may be provided on the rotating shaft 5 to form a lever structure. One end of the straight rod is used as the movable end, and the other end is used as the connecting end. The rotation of the sprocket wheel 1 drives one end of the straight rod to swing, causing the straight rod to rotate around the axis of the rotating shaft 5, and then causing the other end of the straight rod to swing, thereby driving the hinged opening and closing plate 13 to rotate.

[0065] This embodiment does not limit the specific structure of the connecting member 7. Preferably, the connecting member 7 of this embodiment includes a cam bearing, which is detachably connected to the first swing rod 6. One end of the cam bearing with a bearing is located in the groove body 2 to rotate when contacting the inner wall of the groove body 2, reducing friction; of course, in other embodiments, the connecting member 7 may also be only a convex structure.

[0066] In this embodiment, the structures of the first swing rod 6 and the second swing rod 8 are not specifically limited. In order to amplify the amplitude of the grooved wheel 1, the length of the second swing rod 8 in this embodiment is greater than that of the first swing rod 6. At the same time, the included angle between the first swing rod 6 and the second swing rod 8 is 80°-100°, preferably 90°. Of course, in other embodiments, according to the size of the frame 15, the lengths of the first swing rod 6 and the second swing rod 8 can also be set to be the same, and the included angle between the first swing rod 6 and the second swing rod 8 can also be less than 80° or greater than 100°.

[0067] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. An alternating opening and closing feeding mechanism, characterized in that, it includes: a frame (15); a Geneva wheel (1), which is driven and arranged on the frame (15) and can rotate relative to the frame (15). The Geneva wheel (1) has a groove body (2) around its rotation axis. There are several alternately arranged crest segments (3) and trough segments (4) on the inner wall of the groove body (2). The distance from the trough segment (4) to the rotation axis is less than the distance from the crest segment (3) to the rotation axis; an opening and closing structure, which is arranged on the frame (15) and is adapted to be opened or closed within a certain angle range under the drive of an external force; a transmission device (11), which is arranged on the frame (15) and is located on one side of the Geneva wheel (1). One end of it acts on the opening and closing structure, and the other end acts on the Geneva wheel (1). The transmission device (11) includes: a rotating shaft (5), which is arranged on the frame (15); a movable end, one end of which is connected to one end of the rotating shaft (5), and the other end extends into the groove body (2). When the Geneva wheel (1) rotates, it is driven by the groove body (2) to drive the rotating shaft (5) to rotate; a connecting end, which is connected to the other end of the rotating shaft (5), and the opening and closing structure is connected to the connecting end.

2. The alternating opening and closing feeding mechanism according to claim 1, characterized in that, the transmission device (11) further includes: a first swing rod (6), which is arranged at one end of the rotating shaft (5) facing the Geneva wheel (1), and the first swing rod (6) is provided with a connecting piece (7) adapted to connect the groove body (2); a second swing rod (8), which is arranged at one end of the rotating shaft (5) away from the Geneva wheel (1), and the second swing rod (8) is adapted to connect the opening and closing structure; when the Geneva wheel (1) rotates, the groove body (2) drives the connecting piece (7) to move, so that the first swing rod (6) drives the rotating shaft (5) and the second swing rod (8) to rotate, and the second swing rod (8) rotates to drive the opening and closing structure to open or close.

3. The alternating opening and closing feeding mechanism according to claim 2, characterized in that, the transmission device (11) further includes: a first connecting rod (9) and a second connecting rod (10) which are hinged together. The first connecting rod (9) is hinged to the second swing rod (8), and the second connecting rod (10) is adapted to connect the opening and closing structure; when the Geneva wheel (1) rotates, the second swing rod (8) drives the first connecting rod (9) to move, so that the first connecting rod (9) drives the second connecting rod (10) to rotate, to drive the opening and closing structure to open or close.

4. The alternating opening and closing feeding mechanism according to claim 2, characterized in that, the connecting piece (7) includes: a cam bearing, which is detachably connected to the first swing rod (6), and one end of the cam bearing as a bearing is located in the groove body (2).

5. The alternating opening and closing feeding mechanism according to claim 2, characterized in that, the included angle between the first swing rod (6) and the second swing rod (8) is 80° - 100°.

6. The alternating opening and closing feeding mechanism according to claim 2, It is characterized in that the length of the second swing rod (8) is greater than the length of the first swing rod (6).

7. The alternate opening and closing feeding mechanism according to claim 1, It is characterized in that the opening and closing structure includes: a guide plate (12); an opening and closing plate (13) that moves towards or away from the guide plate (12) driven by the transmission device (11), and when the opening and closing plate (13) moves away from the guide plate (12), a passage suitable for articles to pass through is formed between the opening and closing plate (13) and the guide plate (12).

8. The alternate opening and closing feeding mechanism according to claim 7, It is characterized in that the opening and closing structure further includes: a mounting shaft (14) for mounting the opening and closing plate (13); the transmission device (11) is connected to the mounting shaft (14) and is adapted to drive the mounting shaft (14) to rotate so that the opening and closing plate (13) moves towards or away from the guide plate (12).

9. The alternate opening and closing feeding mechanism according to any one of claims 1-8, It is characterized in that the alternate opening and closing feeding mechanism is used for a bag arranging machine.

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