Valve port paper tape positive and negative paper clamping switching structure

Abstract

The application discloses a valve port paper tape positive and negative paper clamping switching structure, which comprises a rack, two cylinder bodies rotatably installed on the rack, a clamping opening arranged on the cylinder body, a folding paper clamping piece arranged in the clamping opening, a folding swing arm rotatably installed on the end surface of the cylinder body, the folding paper clamping piece being rotatable on the folding swing arm, a paper clamping swing arm fixedly installed on the folding paper clamping piece, a folding cam provided on the rack and used for controlling the folding swing arm to rotate, enabling the folding paper clamping piece to stretch out of the clamping opening and realizing a folding function, and a paper clamping cam used for controlling the paper clamping swing arm to rotate, enabling the folding paper clamping piece to abut against the side wall of the clamping opening and realizing a paper clamping function; the folding cam has two layers, namely a folding control part and a paper clamping control part; a protruding part is arranged at the end of the paper clamping roller and used for controlling the paper clamping swing arm to rotate, enabling the folding paper clamping piece stretched out of the clamping opening to be away from the other folding paper clamping piece; when the paper clamping roller moves to the protruding part, the protruding part can control the paper clamping swing arm to rotate, enabling the folding paper clamping piece stretched out of the clamping opening to be away from the other folding paper clamping piece, so that the two folding paper clamping pieces are prevented from abutting against and separating again in the process of continuous rotation, the paper tape is prevented from being clamped and burnt, and the process quality of the paper bag is ensured.

Description

Technical Field

[0001] This invention relates to a paper bag production equipment, and more particularly to a valve-type paper tape forward and reverse paper clamping switching structure. Background Technology

[0002] Paper bags are a common packaging tool in daily life. Especially in modern society that advocates green living, paper bags have gradually replaced plastic as a common tool for filling, packaging, and carrying goods. To facilitate material filling, a paper strip valve is usually added to the bottom of the paper bag, through which the material is filled into the inner cavity of the paper bag. In addition, to increase the strength and sealing of the paper bag opening, reinforcing paper strips are usually attached to the bottom of the paper bag to enhance its load-bearing capacity.

[0003] The current technology for reinforcing paper tape or valve opening paper tape involves pressing the head of the paper tape into the sticker tube using a folding tube, clamping the paper tape and applying adhesive to it through an adhesive applicator, and finally sticking the paper tape to the opening of the paper bag using the sticker tube. Therefore, if a paper bag is missing or fails to open properly during continuous paper bag production, the paper strip clamping by the sticker tube needs to be paused when the paper bag passes the sticker tube, allowing the paper strip to be fed out between the sticker tube and the folding tube and enter the rejection component for rejection. Patent document CN112937000A discloses a mechanism for positive clamping insertion or negative clamping rejection of paper strips, including a frame that rotates to support two folding paper clamping components. The two folding paper clamping components rotate synchronously and in opposite directions. Each folding paper clamping component has a clamping opening, within which a folding paper clamping element is located. The frame is equipped with a folding paper clamping control mechanism that drives the folding paper clamping element to abut against the side wall of the clamping opening to achieve the clamping function or drives the folding paper clamping element to extend from the clamping opening to achieve the folding function. The folding paper clamping control mechanism includes a paper clamping control component and a folding control component located on the frame. The folding control component controls the rotation of the folding swing arm to extend the folding paper clamping element from the clamping opening. The paper clamping control component controls the rotation of the paper clamping arm to make the folding paper clamping component abut against the side wall of the clamping opening. The folding control component is a folding cam, and the paper clamping control component is a paper clamping cam. The folding cam has two layers: a folding control part and a paper clamping control part. The folding roller at one end of the cylinder corresponding to the folding cam cooperates with the folding control part, and the paper clamping roller contacts the paper clamping control part. The paper clamping roller at one end of the cylinder corresponding to the paper clamping cam cooperates with the paper clamping cam. When the clamping opening rotates to a position tangent to the folding paper clamping component, the folding paper clamping piece extends out of the clamping opening according to the trajectory line of the folding cam. However, during the continued rotation, since the cam is not set with a trajectory line that allows the extended folding paper clamping piece to rotate, the angle between the extended folding paper clamping piece and the clamping opening remains fixed during the movement along the trajectory line. Ultimately, the two folding paper clamping pieces abut against each other and then separate. During this process, the paper tape is easily damaged by the clamping of the two folding paper clamping pieces, affecting the processing quality of the paper bag. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a valve-type paper tape forward and reverse paper clamping switching structure.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A valve-type paper tape forward / reverse paper clamping switching structure includes a frame with two cylinders rotatably mounted on the frame. The two cylinders rotate synchronously and in opposite directions. Each cylinder has a clamping opening, and a folding paper clamping component is provided within the clamping opening. A folding swing arm is rotatably mounted on the end face of each cylinder, and the folding paper clamping component rotates on the folding swing arm. The folding paper clamping component is fixedly mounted on the paper clamping swing arm. The frame is equipped with a folding cam that controls the rotation of the folding swing arm to extend the folding paper clamping component from the clamping opening to achieve the folding function, and a paper clamping cam that controls the rotation of the paper clamping swing arm to abut against the side wall of the clamping opening to achieve the paper clamping function. The folding swing arm is rotatably equipped with a folding roller, and the paper clamping swing arm is rotatably equipped with a paper clamping roller. The folding cam has two layers, namely a folding control part and a paper clamping control part. The folding roller at one end of the cylinder corresponding to the folding cam cooperates with the folding control part, and the paper clamping roller contacts the paper clamping control part. The paper clamping roller at one end of the cylinder corresponding to the paper clamping cam cooperates with the paper clamping cam. The paper clamping control part has a protrusion at the end of the paper clamping roller that moves along the paper clamping roller. The protrusion controls the rotation of the paper clamping swing arm to move the folding paper clamping part extending to the clamping opening away from the other folding paper clamping part.

[0007] The two cylinders are a first cylinder and a second cylinder. When the first cylinder or the second cylinder performs the folding function, the clamp of the first cylinder is aligned with the clamp of the first cylinder.

[0008] There are two folding swing arms and two paper clamping swing arms. The two folding swing arms are located at both ends of the cylinder, and the two paper clamping swing arms are located at both ends of the cylinder. The folding paper clamping component is connected between the two folding swing arms.

[0009] A paper clamping shaft is rotatably mounted between the two folding arms. The folding paper clamp is mounted on the paper clamping shaft. The end of the paper clamping shaft passes through the folding arms. The two paper clamping arms are respectively fixedly connected to the two ends of the paper clamping shaft that extend out of the folding arms. A folding roller is rotatably mounted on one end of the paper clamping shaft that extends out of the paper clamping arms. Both paper clamping arms are rotatably mounted with the paper clamping roller.

[0010] One end of the folding cam is rotatably mounted on the frame, and the other end is connected to a switching component.

[0011] The switching component is a switching cylinder, which is rotatably mounted on the frame. The folding cam of the first cylinder is rotatably connected to the output shaft of the switching cylinder, and the folding cam of the second cylinder is rotatably connected to the folding cam of the first cylinder or the output shaft of the switching cylinder via a connecting rod.

[0012] The folding cam is located at one end of the cylinder, and the paper clamping cam is located at the other end of the cylinder.

[0013] A folding return spring is connected between the end face of the cylinder and the folding swing arm, and a paper clamping return spring is connected between the end face of the cylinder and the paper clamping swing arm.

[0014] The beneficial effects of this invention are as follows: This invention has a protrusion at the end of the paper clamping control part of the folding cam that moves along the paper clamping roller. When the paper clamping roller moves to the protrusion, the protrusion can control the paper clamping swing arm to rotate so that the folding paper clamp piece extending to the clamping opening is away from the other folding paper clamp piece. This avoids the two folding paper clamp pieces from colliding and separating during the continued rotation process, which would cause the paper strip to tear and ensure the process quality of the paper bag. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the assembly of the present invention on the frame;

[0017] Figure 2 This is an exploded view of the tube and the folding clip paper components;

[0018] Figure 3 This is a top view of the present invention;

[0019] Figure 4 This is a bottom view of the present invention;

[0020] Figure 5 This is a schematic diagram of the folding cam. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0022] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0023] Reference Figures 1 to 5A valve-type paper tape forward / reverse paper clamping switching structure includes a frame 1. Two cylinders 2 are rotatably mounted on the frame 1, rotating synchronously and in opposite directions. Each cylinder 2 has a clamping opening 3, within which a folding paper clamping component 14 is provided. A folding swing arm 4 is rotatably mounted on the end face of each cylinder 2, and the folding paper clamping component 14 rotates on the folding swing arm 4. A paper clamping swing arm 5 is fixedly mounted on the folding paper clamping component 14. The frame 1 is provided with a folding cam 6 that controls the rotation of the folding swing arm 4 to extend the folding paper clamping component 14 from the clamping opening 3 to achieve a folding function, and a paper clamping cam 7 that controls the rotation of the paper clamping swing arm 5 to abut the folding paper clamping component 14 against the side wall of the clamping opening 3 to achieve a paper clamping function. A folding roller 8 is rotatably mounted on the folding swing arm 4, and a paper clamping roller 9 is rotatably mounted on the paper clamping swing arm 5. The folding cam 6 has two layers. The tube 2 consists of a folding control unit 61 and a paper clamping control unit 62. The folding roller 8 at one end of the tube 2 corresponding to the folding cam 6 cooperates with the folding control unit 61. The paper clamping roller 9 contacts the paper clamping control unit 62. The paper clamping roller 9 at one end of the tube 2 corresponding to the paper clamping cam 7 cooperates with the paper clamping cam 7. The paper clamping control unit 62 has a protrusion 10 at the end of the paper clamping roller 9. The protrusion 10 controls the paper clamping arm 5 to rotate so that the folding paper clamping piece 14 extending to the clamping opening 3 moves away from the other folding paper clamping piece 14. When the paper clamping roller moves to the protrusion, the protrusion can control the paper clamping arm to rotate so that the folding paper clamping piece extending to the clamping opening moves away from the other folding paper clamping piece, thus avoiding the two folding paper clamping pieces from colliding and separating during the continued rotation, which would cause the paper strip to tear and ensure the process quality of the paper bag.

[0024] The two cylinders 2 are a first cylinder and a second cylinder, respectively. When the first cylinder or the second cylinder performs the folding function, the clamp 3 of the first cylinder is directly opposite the clamp 3 of the first cylinder.

[0025] There are two of each of the folding swing arms 4 and the paper clamping swing arms 5. The two folding swing arms 4 are located at both ends of the cylinder 2, and the two paper clamping swing arms 5 are located at both ends of the cylinder 2. The folding paper clamping component 14 is connected between the two folding swing arms 4.

[0026] A paper clamping shaft 11 is rotatably mounted between the two folding arms 4. The folding paper clamping component 14 is mounted on the paper clamping shaft 11. The end of the paper clamping shaft 11 passes through the folding arms 4. The two paper clamping arms 5 are respectively fixedly connected to the two ends of the paper clamping shaft 11 that extend out of the folding arms 4. A folding roller 8 is rotatably mounted on one end of the paper clamping shaft 11 that extends out of the paper clamping arms 5. The paper clamping roller 9 is rotatably mounted on both paper clamping arms 5.

[0027] One end of the folding cam 6 is rotatably mounted on the frame 1, and the other end is connected to a switching assembly, which is a switching cylinder 12. The switching cylinder 12 is rotatably mounted on the frame. The folding cam 6 of the first cylinder is rotatably connected to the output shaft of the switching cylinder 12. The folding cam 6 of the second cylinder is rotatably connected to the folding cam 6 of the first cylinder or the output shaft of the switching cylinder 12 through a connecting rod 13. The folding cam 6 is located at one end of the cylinder 2, and the paper clamping cam 7 is located at the other end of the cylinder 2.

[0028] A folding return spring is connected between the end face of the cylinder 2 and the folding swing arm 4, and a paper clamping return spring is connected between the end face of the cylinder 2 and the paper clamping swing arm 5.

[0029] In this invention, the term "a plurality of" refers to two or more unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection via an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A valve paper tape positive-negative paper clamping switching structure comprising a frame (1), characterized in that The frame (1) is rotatably provided with two barrels (2), the two barrels (2) are synchronously and reversely rotated, the barrel (2) is provided with a clamping opening (3), the clamping opening (3) is provided with a folding paper piece (14), the end surface of the barrel (2) is rotatably provided with a folding swing arm (4), the folding paper piece (14) is rotatably arranged on the folding swing arm (4), the folding paper piece (14) is fixedly provided with a paper clamping swing arm (5), the frame (1) is provided with a folding cam (6) for controlling the rotation of the folding swing arm (4) to make the folding paper piece (14) extend from the clamping opening (3) to realize the folding function and a paper clamping cam (7) for controlling the rotation of the paper clamping swing arm (5) to make the folding paper piece (14) abut against the side wall of the clamping opening (3) to realize the paper clamping function, the folding swing arm (4) is rotatably provided with a folding roller (8), the paper clamping swing arm (5) is rotatably provided with a paper clamping roller (9), the folding cam (6) has two layers, which are a folding control part (61) and a paper clamping control part (62), the folding roller (8) corresponding to one end of the folding cam (6) of the barrel (2) is matched with the folding control part (61), the paper clamping roller (9) is in contact with the paper clamping control part (62), the paper clamping roller (9) corresponding to one end of the paper clamping cam (7) of the barrel (2) is matched with the paper clamping cam (7), the paper clamping control part (62) is provided with a protruding part (10) at the end of the paper clamping roller (9), the protruding part (10) controls the rotation of the paper clamping swing arm (5) to make the folding paper piece (14) extending to the clamping opening (3) away from the other folding paper piece (14).

2. The valve paper tape positive-negative paper switching structure according to claim 1, wherein The two barrels (2) are a first barrel and a second barrel, when the first barrel or the second barrel realizes the folding function, the clamping opening (3) of the first barrel is opposite to the clamping opening (3) of the first barrel.

3. The valve paper tape positive-negative paper switching structure according to claim 1, characterized in that The folding swing arm (4) and the paper clamping swing arm (5) are both provided with two, the two folding swing arms (4) are located at the two ends of the barrel (2), the two paper clamping swing arms (5) are located at the two ends of the barrel (2), and the folding paper piece (14) is connected between the two folding swing arms (4).

4. The valve paper tape positive-negative paper switching structure according to claim 3, wherein The two folding swing arms (4) are rotatably provided with a paper clamping shaft (11), the folding paper piece (14) is installed on the paper clamping shaft (11), the paper clamping shaft (11) penetrates through the folding swing arm (4), the two paper clamping swing arms (5) are fixedly connected to the two ends of the paper clamping shaft (11) penetrating through the folding swing arm (4), and one end of the paper clamping shaft (11) penetrating through the paper clamping swing arm (5) is rotatably provided with the folding roller (8), and the two paper clamping swing arms (5) are both rotatably provided with the paper clamping roller (9).

5. The valve paper tape positive-negative paper switching structure according to claim 2, wherein One end of the folding cam (6) is rotatably arranged on the frame (1), and the other end is connected with a switching assembly.

6. The valve paper tape positive-negative paper switching structure according to claim 5, wherein The switching assembly is a switching cylinder (12), which is rotatably installed on the frame, the folding cam (6) of the first cylinder body is rotatably connected with the output shaft of the switching cylinder (12), and the folding cam (6) of the second cylinder body is rotatably connected with the folding cam (6) of the first cylinder body or the output shaft of the switching cylinder (12) through a connecting rod (13).

7. The valve paper tape positive-negative paper switching structure according to claim 1, characterized in that The folding cam (6) is located at one end of the cylinder body (2), and the paper clamping cam (7) is located at the other end of the cylinder body (2).

8. The valve paper tape positive-negative paper switching structure according to claim 1, characterized in that A folding reset spring is connected between the end face of the cylinder body (2) and the folding swing arm (4), and a paper clamping reset spring is connected between the end face of the cylinder body (2) and the paper clamping swing arm (5).

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