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 cam with a plurality of alternately arranged crest segments and trough segments on its outer peripheral wall; 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 machine frame and located on one side of the cam, with one end acting on the opening and closing structure and the other end acting on the cam. In the transmission device of the present invention, the abutting end of the first connecting rod abuts against the outer peripheral wall of the cam under the action of a biasing member. When the cam rotates, the abutting end sequentially passes through the alternately arranged crest segments and trough segments, so that the first connecting rod reciprocally rotates around the hinge shaft, and further the connecting end of the first connecting rod 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 there will be no signal delay caused by an electrical control system, resulting in the situation that the opening and closing structure fails to open or close in time.

Description

Technical Field

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

[0002] In the prior art, a bag aligning 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 without falling 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 aligning machine, which includes a guiding plate and an opening and closing plate that is 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 between 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 between 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 alternating opening and closing feeding mechanism.

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

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

[0006] A frame;

[0007] A cam, which is driven to be arranged on the frame and can rotate relative to the frame. The outer peripheral wall of the cam has a plurality of alternately arranged peak segments and valley segments, and the distance from the valley segment to the rotation axis is less than the distance from the peak segment to the rotation axis;

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

[0009] A transmission device is provided on the frame and is located on one side of the cam. One end thereof acts on the opening and closing structure, and the other end acts on the cam. The transmission device includes:

[0010] A first connecting rod is hingedly provided on the frame. It includes a contact end that contacts the outer peripheral wall of the cam and a connecting end that connects to the opening and closing structure. The first connecting rod is adapted to be driven by the outer peripheral wall of the cam to rotate and drive the opening and closing structure to open or close;

[0011] A biasing member connects the frame and the contact end. The biasing member is adapted to provide a biasing force to the contact end so that the contact end contacts the outer peripheral wall of the cam.

[0012] Optionally, the transmission device further includes:

[0013] A second connecting rod, one end of which is hinged to the connecting end and the other end of which is connected to the opening and closing structure. The second connecting rod is adapted to move in a direction away from the opening and closing structure when the connecting end rotates in a direction away from the opening and closing structure, and is driven by the connecting end to move in a direction away from the opening and closing structure to drive the opening and closing structure to open, or, when the connecting end rotates in a direction towards the opening and closing structure, is driven by the connecting end to move in a direction towards the opening and closing structure to drive the opening and closing structure to close.

[0014] Optionally, the transmission device further includes:

[0015] A third connecting rod, one end of which is hinged to the second connecting rod and the other end of which is connected to the opening and closing structure. The third connecting rod is adapted to be driven by the second connecting rod to drive the opening and closing structure to open or close.

[0016] Optionally, a rotating contact member is rotatably connected to the contact end. The rotating contact member contacts the outer peripheral wall of the cam and is adapted to rotate under the friction of the outer peripheral wall.

[0017] Optionally, the biasing member includes: a spring provided on the frame, and the spring is connected to the contact end to provide a pressure towards the cam to the contact end.

[0018] Optionally, the opening and closing structure includes:

[0019] A guide plate;

[0020] An opening and closing plate is driven by the transmission device to move towards or away from the guide plate. And when the opening and closing plate moves away from the guide plate, a passage adapted for an article to pass through is formed between the opening and closing plate and the guide plate.

[0021] Optionally, the opening and closing structure further includes:

[0022] a mounting shaft for mounting the opening and closing plate;

[0023] 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.

[0024] Optionally, the alternating opening and closing feeding mechanism is used for a bag arranging machine.

[0025] The technical solution of the present invention has the following advantages:

[0026] 1. The alternating opening and closing feeding mechanism provided by the present invention includes a frame; a cam, which is driven to be arranged on the frame and can rotate relative to the frame, and the outer peripheral wall of the cam has a plurality of alternately arranged peak segments and valley segments, and the distance from the valley segment to the rotation axis is less than the distance from the peak segment to the rotation axis; 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; a transmission device, which is arranged on the frame and on one side of the cam, one end of which acts on the opening and closing structure, and the other end acts on the cam. The transmission device includes: a first connecting rod, which is hinged to the frame, and includes an abutting end abutting against the outer peripheral wall of the cam and a connecting end connecting to the opening and closing structure. The first connecting rod is adapted to be driven by the outer peripheral wall of the cam to rotate and drive the opening and closing structure to open or close; a biasing member, which connects the frame and the abutting end, and the biasing member is adapted to provide a biasing force to the abutting end so that the abutting end abuts against the outer peripheral wall of the cam.

[0027] The present invention provides a cam, an opening and closing structure and a transmission device. The abutting end of the first connecting rod in the transmission device abuts against the outer peripheral wall of the cam under the action of the biasing member. When the cam rotates, the abutting end sequentially passes through the alternately arranged peak segments and valley segments, so that the first connecting rod reciprocally rotates around the hinge axis, and further the connecting end of the first connecting rod drives the opening and closing structure to alternately open and close. Therefore, the present invention realizes the alternate 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 is not opened or closed in time.

[0028] 2. The alternating opening and closing feeding mechanism provided by the present invention, the transmission device further includes a second connecting rod, one end of which is hinged to the connecting end, and the other end is connected to the opening and closing structure. The second connecting rod is adapted to move in a direction away from the opening and closing structure when the connecting end rotates in a direction away from the opening and closing structure, so as to drive the opening and closing structure to open, or, when the connecting end rotates in a direction towards the opening and closing structure, move in a direction towards the opening and closing structure under the drive of the connecting end, so as to drive the opening and closing structure to close.

[0029] The present invention provides a second connecting rod, which connects the first connecting rod and the opening and closing structure, and moves in a direction towards or away from the opening and closing structure under the drive of the first connecting rod, thereby driving the opening and closing structure to open and close. By providing the second connecting rod, the distance between the opening and closing structure and the first connecting rod is increased, that is, the distance between the opening and closing structure and the cam is increased, thereby increasing the distance range when the cam and the opening and closing structure are installed, and avoiding the limitation of the distance causing interference between the cam and the opening and closing structure and other mechanical structures.

[0030] 3. The alternating opening and closing feeding mechanism provided by the present invention, the transmission device further includes a third connecting rod, one end of which is hinged to the second connecting rod, and the other end is connected to the opening and closing structure. The third connecting rod is adapted to drive the opening and closing structure to open or close under the drive of the second connecting rod.

[0031] The present invention provides a third connecting rod, which further increases the distance between the opening and closing structure and the first connecting rod, that is, further increases the distance between the opening and closing structure and the cam, thereby increasing the distance range when the cam and the opening and closing structure are installed, and avoiding the limitation of the distance causing interference between the cam and the opening and closing structure and other mechanical structures; at the same time, providing the third connecting rod enables the transmission device to make the opening and closing structure open and close by connecting the mounting shaft. Compared with the way that the second connecting rod directly hinges the opening and closing plate to achieve opening and closing, the applicable range of the installation position of the opening and closing structure and the transmission device is enhanced, the structural size of the opening and closing plate is reduced, and the structure of the alternating opening and closing feeding mechanism is more convenient for installation and use.

[0032] 4. The alternating opening and closing feeding mechanism provided by the present invention, the abutting end is provided with a rotating abutting member rotatably connected thereto, the rotating abutting member abuts against the outer peripheral wall of the cam, and is adapted to rotate under the friction of the outer peripheral wall.

[0033] The present invention is provided with a rotating abutting member rotatably connected to the abutting end. When the cam rotates, the rotating abutting member contacts the outer peripheral wall of the cam and rotates, thereby reducing the friction, avoiding the loss of the power of the cam rotation due to the friction force, and avoiding the damage caused by the friction between the abutting end and the outer peripheral wall of the cam.

[0034] 5. The alternate 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 is driven by the transmission device to move towards or away from the guide plate, and when the opening and closing plate moves away from the guide plate, a passage suitable for articles to pass through is formed between the opening and closing plate and the guide plate.

[0035] A passage 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.

[0036] 6. The alternate 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.

[0037] The present invention provides a mounting shaft 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. Compared with the case where the transmission device is connected to the opening and closing plate, the installation difficulty is lower.

[0038] 7. The alternate opening and closing feeding mechanism provided by the present invention, which is used for a bag arranging machine.

[0039] The alternate 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 cam, so that articles can accurately and timely pass through the opening and closing structure and reach the corresponding accommodating space, avoiding the situation of bag jamming. Description of the Drawings

[0040] 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 for use in the description of the specific embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0041] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0042] Figure 2 It is a front view of the cam provided in Embodiment 1 of the present invention;

[0043] Figure 3 It is a front view of the blade structure provided in Embodiment 1 of the present invention.

[0044] Explanation of the Reference Numerals:

[0045] 1. Frame; 2. Cam; 3. Crest section; 4. Trough section; 5. Opening and closing structure; 6. Transmission device; 7. First connecting rod; 8. Biasing member; 9. Second connecting rod; 10. Third connecting rod; 11. Rotating abutting member; 12. Guide plate; 13. Opening and closing plate; 14. Mounting shaft; 15. Hinge shaft; 16. Claw; 17. Rotating shaft; 18. Accommodating space. Detailed implementation manner

[0046] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "first", "second", and "third" are only used for distinction and cannot be understood as indicating or implying relative importance.

[0048] 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 elements. 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.

[0049] 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.

[0050] Embodiment 1

[0051] 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

[0052] A frame 1. Preferably, the frame 1 of this embodiment is suitable for setting a rotatable rotating shaft 17. A plurality of blade structures are arranged 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 accommodating space 18 between two adjacent claws 16 is used to accommodate the falling articles, that is, packaging bags. In this embodiment, the frame 1 is provided with a space suitable for accommodating the plurality of blade structures on the rotating shaft 17.

[0053] The cam 2 is driven and arranged on the frame 1 and can rotate relative to the frame 1. The outer peripheral wall of the cam 2 has a plurality of alternately arranged peak segments 3 and valley segments 4. The distance from the valley segment 4 to the rotation axis is less than the distance from the peak segment 3 to the rotation axis. The number of the peak segments 3 and the valley segments 4 determines the number of times the opening and closing structure 5 performs the opening and closing actions when the cam 2 rotates one week. Preferably, both the peak segment 3 and the valley segment 4 in this embodiment are set to three. The angle of the peak segment 3, that is Figure 2 the α angle in, determines the duration of the closing action of the opening and closing structure 5. The angle of the valley segment 4, that is Figure 2 the β angle in, determines the duration of the opening action of the opening and closing structure 5. The difference between the distance from the valley segment 4 to the rotation axis and the distance from the peak segment 3 to the rotation axis is the amplitude of the cam 2, which determines the opening amplitude of the opening and closing structure 5 and can avoid the collision between the guide plate 12 and the opening and closing plate 13, thus causing damage or noise. In this embodiment, both the peak segment 3 and the valley segment 4 adopt involute curves to enable the rotating contact member 11 to move smoothly along the outer peripheral wall of the cam 2. The driving structure of the cam 2 in this embodiment is not limited. Preferably, the cam 2 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 peak segment 3 and the valley segment 4, the opening and closing structure 5 can be opened corresponding to the accommodating space 18, so that the packaging bag directly falls into the corresponding accommodating space 18 after passing through the opening and closing structure 5, and then the bag arranging action is completed. Of course, in other embodiments, the cam 2 can also be rotatably connected to the frame 1 and the cam 2 can be directly driven to rotate by a rotating motor; or a gear transmission group can be used to connect the cam 2 and the rotating shaft 17 to change the transmission ratio; or the cam 2 can be rotated manually.

[0054] An opening and closing structure 5 is provided on the frame 1 and is adapted to be opened or closed within a certain angular range under the drive of an external force. The specific structure of the opening and closing structure 5 is not limited in this embodiment. Preferably, the opening and closing structure 5 in this embodiment is provided in one-to-one correspondence with the rotating shaft 17, and the opening and closing structure 5 is located above the corresponding blade structure. It includes a guide plate 12 fixedly installed on the frame 1 through a bracket; a mounting shaft 14 rotatably arranged on the frame 1 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 one side of the mounting shaft 14 facing the corresponding blade structure. A transmission device 6 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 5. Of course, in other embodiments, the transmission device 6 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 6 drives the opening and closing plate 13 to rotate around the mounting shaft 14, thereby realizing the opening and closing action of the opening and closing structure 5. 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 1 and is rotatably connected to the frame 1. A slide rail can also be provided on the frame 1. 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 6.

[0055] A transmission device 6 is provided on the frame 1 and is located on one side of the cam 2. One end of it acts on the opening and closing structure 5, and the other end acts on the cam 2. Driven by the outer peripheral wall of the cam 2, it drives the opening and closing structure 5 to perform the opening and closing action.

[0056] In this embodiment, the specific structure of the transmission device 6 is not limited. Preferably, the transmission device 6 of this embodiment includes a first connecting rod 7, a second connecting rod 9, a third connecting rod 10, and a biasing member 8. The first connecting rod 7 is rotatably arranged on the frame 1 through a hinge shaft 15, and it includes an abutting end abutting against the outer peripheral wall of the cam 2 and a connecting end connecting to the opening and closing structure 5. The hinge shaft 15 is located between the abutting end and the connecting end. The second connecting rod 9 and the third connecting rod 10 are hinged to each other. The second connecting rod 9 is also hinged to the connecting end of the first connecting rod 7. The third connecting rod 10 is fixedly connected to the mounting shaft 14 of the opening and closing structure 5 to drive the mounting shaft 14 and the opening and closing plate 13 to rotate, so as to realize the opening or closing of the opening and closing structure 5. During the rotation of the cam 2, the abutting end moves along the outer peripheral wall of the cam 2 and successively passes through the peak segment 3 and the trough segment 4, causing the abutting end to rotate around the hinge shaft 15, and further driving the connecting end to rotate around the hinge shaft 15. The connecting end drives the second connecting rod 9 to move in a direction towards or away from the opening and closing structure 5, and further drives the third connecting rod 10 to rotate around the axis of the mounting shaft 14 to drive the mounting shaft 14 and the opening and closing plate 13 to rotate, so as to realize the opening or closing of the opening and closing structure 5, as Figure 1As shown, when the abutting end moves from the trough section 4 to the peak section 3 along the outer peripheral wall of the cam 2, the abutting end is pushed by the cam 2 and rotates in a direction away from the cam 2, thereby driving the connecting end to rotate in a direction towards the opening and closing structure 5, and further pushing the second connecting rod 9 to move in a direction towards the opening and closing structure 5, so as to push the third connecting rod 10 to rotate around the axis of the mounting shaft 14 in a direction away from the first connecting rod 7. During the rotation of the third connecting rod 10, the mounting shaft 14 and the opening and closing plate 13 are driven to rotate, that is, the opening and closing plate 13 rotates towards the guide plate 12 to close the opening and closing structure 5; when the abutting end moves from the peak section 3 to the trough section 4 along the outer peripheral wall of the cam 2, the abutting end is biased by the biasing member 8 and rotates in a direction towards the cam 2, thereby driving the connecting end to rotate in a direction away from the opening and closing structure 5, and further pulling the second connecting rod 9 to move in a direction away from the opening and closing structure 5, so as to pull the third connecting rod 10 to rotate around the axis of the mounting shaft 14 in a direction towards the first connecting rod 7. During the rotation of the third connecting rod 10, the mounting shaft 14 and the opening and closing plate 13 are driven to rotate, that is, the opening and closing plate 13 rotates away from the guide plate 12 to open the opening and closing structure 5; the biasing member 8 connects the frame 1 and the abutting end to provide a biasing force to the abutting end so that the abutting end abuts against the outer peripheral wall of the cam 2; the specific structure of the biasing member 8 in this embodiment is not limited. Preferably, the biasing member 8 in this embodiment is a spring provided on the frame 1. The spring is connected to the abutting end and is located on the side of the abutting end different from the side where the cam 2 is provided to provide a pressure towards the cam 2 to the abutting end, so that during the rotation of the cam 2, the abutting end always abuts against the outer peripheral wall of the cam 2; of course, in other embodiments, the biasing member 8 can also be provided on the side of the abutting end where the cam 2 is provided. At this time, the biasing member 8 provides a pulling force towards the cam 2 to the abutting end; of course, in other embodiments, the biasing member 8 can also be an elastic rubber member; of course, in other embodiments, the transmission device 6 can also not be provided with the third connecting rod 10. The end of the second connecting rod 9 different from the end connected to the first connecting rod 7 is directly hinged to the end of the opening and closing plate 13 different from the end connected to the mounting shaft 14. By the movement of the second connecting rod 9 towards or away from the opening and closing structure 5, the opening and closing plate 13 is driven to rotate around the axis of the mounting shaft 14, thereby realizing the opening and closing of the opening and closing structure 5; of course, in other embodiments, the third connecting rod 10 and the second connecting rod 9 can also not be provided. The connecting end of the first connecting rod 7 is directly hinged to the end of the opening and closing plate 13 different from the end connected to the mounting shaft 14 to drive the opening and closing plate 13 to rotate around the axis of the mounting shaft 14, thereby realizing the opening and closing of the opening and closing structure 5.

[0057] The abutting end of this embodiment is provided with a rotating abutting member 11 rotatably connected thereto. The rotating abutting member 11 abuts against the outer peripheral wall of the cam 2 and is adapted to rotate due to the friction of the outer peripheral wall. The rotating abutting member 11 in this embodiment is preferably a bearing. Of course, in other embodiments, it can also be a sleeve; of course, in other embodiments, the rotating abutting member 11 can also not be provided.

[0058] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of the present invention.

Claims

1. An alternating opening and closing feeding mechanism, characterized in that, it includes: a frame (1); a cam (2), which is driven and arranged on the frame (1) and can rotate relative to the frame (1). There are several alternately arranged peak segments (3) and valley segments (4) on the outer peripheral wall of the cam (2), and the distance from the valley segment (4) to the rotation axis is less than the distance from the peak segment (3) to the rotation axis; an opening and closing structure (5), which is arranged on the frame (1) and is adapted to be opened or closed within a certain angle range under the drive of an external force; a transmission device (6), which is arranged on the frame (1) and is located on one side of the cam (2). One end acts on the opening and closing structure (5), and the other end acts on the cam (2). The transmission device (6) includes: a first connecting rod (7), which is hinged on the frame (1). It includes an abutting end abutting against the outer peripheral wall of the cam (2) and a connecting end connecting the opening and closing structure (5). The first connecting rod (7) is adapted to be driven by the outer peripheral wall of the cam (2) to rotate and drive the opening and closing structure (5) to open or close; a biasing member (8), which connects the frame (1) and the abutting end. The biasing member (8) is adapted to provide a biasing force to the abutting end so that the abutting end abuts against the outer peripheral wall of the cam (2).

2. The alternating opening and closing feeding mechanism according to claim 1, characterized in that, the transmission device (6) further includes: a second connecting rod (9), one end of which is hinged to the connecting end and the other end is connected to the opening and closing structure (5). The second connecting rod (9) is adapted to move in a direction away from the opening and closing structure (5) when the connecting end rotates in a direction away from the opening and closing structure (5), and is driven by the connecting end to drive the opening and closing structure (5) to open, or, when the connecting end rotates in a direction towards the opening and closing structure (5), move in a direction towards the opening and closing structure (5) under the drive of the connecting end to drive the opening and closing structure (5) to close.

3. The alternating opening and closing feeding mechanism according to claim 2, characterized in that, the transmission device (6) further includes: a third connecting rod (10), one end of which is hinged to the second connecting rod (9) and the other end is connected to the opening and closing structure (5). The third connecting rod (10) is adapted to be driven by the second connecting rod (9) to drive the opening and closing structure (5) to open or close.

4. The alternating opening and closing feeding mechanism according to claim 1, characterized in that, a rotating abutting member (11) is rotatably connected to the abutting end. The rotating abutting member (11) abuts against the outer peripheral wall of the cam (2) and is adapted to rotate due to the friction of the outer peripheral wall.

5. The alternating opening and closing feeding mechanism according to claim 1, characterized in that, the biasing member (8) includes: a spring arranged on the frame (1), and the spring is connected to the abutting end to provide a pressure towards the cam (2) to the abutting end.

6. The alternating opening and closing feeding mechanism according to claim 1, characterized in that, the opening and closing structure (5) includes: a guide plate (12); The opening and closing plate (13) is driven by the transmission device (6) to move towards or away from the guiding plate (12), and when the opening and closing plate (13) moves away from the guiding plate (12), a passage suitable for articles to pass through is formed between the opening and closing plate (13) and the guiding plate (12).

7. The alternating opening and closing feeding mechanism according to claim 6, characterized in that the opening and closing structure (5) further comprises: a mounting shaft (14) for arranging the opening and closing plate (13); the transmission device (6) 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 guiding plate (12).

8. The alternating opening and closing feeding mechanism according to any one of claims 1-7, characterized in that the alternating opening and closing feeding mechanism is used for a bag arranging machine.

Images