A switchable lancing mechanism

Abstract

The utility model discloses a switchable puncture mechanism, including frame, install rotatable carousel in the frame, and the carousel is provided with several strip holes along the circumference, and the different strip holes are provided with different models of puncture roller, and the frame is provided with the brush roller of adjustable position corresponding to the puncture roller, can according to production demand quick corresponding puncture roller rotation to the working position, greatly reduced the time of changing roller, avoided the production interruption caused by shutdown, significantly improved the production efficiency, in addition, the frame is provided with the swing arm assembly that reciprocates through the cam group, and the swing arm assembly is provided with the first swing arm that pushes the puncture roller away from the brush roller and is installed at the both sides of puncture roller, and the rotating speed of cam group is matched with production line, according to the part of bag that does not need to be punctured, the puncture roller is pushed away from the brush roller by the first swing arm through the cam group, realizes the accurate control of different puncture arrangement, satisfies the no puncture demand of specific area.

Description

Technical Field

[0001] This utility model relates to a production line for packaging bags such as cement bags and chemical bags, and in particular to a switchable piercing mechanism. Background Technology

[0002] In the production of packaging bags, such as cement bags and chemical bags, piercing ventilation holes in the bag body is an important process. Currently, the industry generally uses piercing rollers to complete this operation.

[0003] Different types of packaging bags have significantly different requirements for the arrangement and density of air vents. In the current production process, when it is necessary to produce packaging bags of different specifications, the piercing roller must be replaced. This operation is not only cumbersome and time-consuming, but also requires machine downtime, which greatly affects production efficiency and increases production costs.

[0004] The ventilation holes of some packaging bags are not evenly distributed throughout the entire bag body. For example, some packaging bags only need ventilation holes at both ends, and no holes are needed in the middle. Most of the existing puncture equipment cannot flexibly adapt to this localized puncture requirement. Usually, the entire bag body is punctured uniformly. If localized puncture is to be achieved, manual intervention by the operator is required, or complex and expensive auxiliary devices are used. The operation is extremely inconvenient, and it is difficult to guarantee the accuracy and consistency of the puncture position. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a switchable piercing mechanism.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A switchable piercing mechanism includes a frame, a rotatable turntable frame installed inside the frame, a plurality of strip-shaped holes arranged circumferentially on the turntable frame, different types of piercing rollers installed in different strip-shaped holes, adjustable brush rollers arranged on the frame corresponding to the piercing rollers, and a swing arm assembly that reciprocates via a cam group installed inside the frame, with first swing arms installed on both sides of the swing arm assembly to push the piercing rollers away from the brush rollers.

[0008] The turntable frame includes turntables on both sides, which are connected by a linkage group. The strip hole is provided on the turntable, and the center of the turntable is mounted on the frame through a rotating shaft. A hand crank is installed at one end of the rotating shaft.

[0009] A limiting plate is installed on one side of the frame corresponding to the rotating shaft. The limiting plate has several positioning holes along its circumference. A spring is installed inside the hand crank to drive the hand crank back to the limiting plate. The hand crank has an insertion part corresponding to the positioning hole, and the insertion part is inserted into the positioning hole.

[0010] The turntable has a plurality of notches 25 along its circumference. A limiting member is installed on the turntable at the position of the notch 25. The notch 25 and the limiting member together form the strip hole.

[0011] The inner side of the frame is symmetrically equipped with levers driven by cylinders. The two ends of the brush roller are respectively installed at the ends of the two levers, and the other end of the lever is connected to the frame through a tension spring.

[0012] The frame is equipped with a manually rotatable fine-tuning shaft, and the fine-tuning shaft is provided with a cam structure corresponding to the lever, the lever engaging with the cam structure.

[0013] The swing arm assembly includes a rotating rod, a first swing arm is mounted on both sides of the rotating rod, a second swing arm that can be adjusted along the length direction is mounted on one end of the rotating rod, and a roller is mounted on the end of the second swing arm, the roller abutting against the cam assembly.

[0014] A reset seat is installed on the outer side of the frame corresponding to the second swing arm. A compression spring for pushing the second swing arm toward the cam assembly is installed on the reset seat, and the end of the compression spring abuts against the second swing arm.

[0015] The cam assembly consists of at least one layer of cams, with the protrusions of different layers of cams located at different positions.

[0016] The beneficial effects of this utility model are as follows: This utility model has a rotatable turntable frame installed in the frame. The turntable frame has several strip holes arranged circumferentially. Different types of piercing rollers are installed in different strip holes. The frame is equipped with adjustable brush rollers corresponding to the piercing rollers. The corresponding piercing rollers can be quickly rotated to the working position according to production needs, which greatly reduces the roller changing time, avoids production interruption caused by machine downtime, and significantly improves production efficiency. In addition, the frame is equipped with a swing arm assembly that swings back and forth through a cam group. The swing arm assembly is located on both sides of the piercing roller and has a first swing arm that pushes the piercing roller away from the brush roller. The rotation speed of the cam group is matched with the production line. According to the part of the packaging bag that does not need to be pierced, the cam group pushes the piercing roller away from the brush roller through the first swing arm, realizing precise control of different piercing hole arrangements and meeting the need for no piercing holes in specific areas. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a structural diagram of the present invention;

[0019] Figure 2 This is a structural diagram of the brush roller.

[0020] Figure 3 This is one of the structural diagrams of the turntable frame;

[0021] Figure 4 This is the second structural diagram of the turntable frame;

[0022] Figure 5 This is a structural diagram of the turntable;

[0023] Figure 6 This is a structural diagram of the swing arm assembly. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 of the present utility model can be combined with each other.

[0025] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0026] The following describes some embodiments of the present invention with reference to the accompanying drawings.

[0027] Reference Figure 1-6 A switchable piercing mechanism includes a frame 1, within which a rotatable turntable 2 is installed. The turntable 2 has several circumferentially arranged slotted holes 3, each containing a different type of piercing roller 4. An adjustable brush roller 5 is positioned on the frame 1 corresponding to the piercing roller 4, allowing for rapid rotation of the appropriate piercing roller 4 to the working position according to production needs. This significantly reduces roller changing time, avoids production interruptions due to downtime, and substantially improves production efficiency. Furthermore, the frame 1 is equipped with a swing arm assembly 7 that reciprocates via a cam group 6. The swing arm assembly 7 has first swing arms 8 on both sides of the piercing roller 4 that push the piercing roller 4 away from the brush roller 5. The rotation speed of the cam group 6 is matched to the production line. Based on the portion of the packaging bag that does not require piercing, the cam group 6 pushes the piercing roller 4 away from the brush roller 5 via the first swing arms 8, achieving precise control of different piercing hole arrangements and meeting the requirement of piercing-free areas.

[0028] Figure 1 The diagram shows only one piercing mechanism. In this embodiment, multiple piercing mechanisms can be installed vertically to pierce multiple layers of paper simultaneously.

[0029] Furthermore, the brush roller 5 and the piercing roller 4 work together to complete the piercing operation. When the packaging bag passes between them, the piercing needle on the piercing roller 4 passes through the packaging bag, while the brush roller 5 provides support to the packaging bag from the other side. During the piercing process, the piercing needle on the piercing roller 4 pierces into the gap between the brushes of the brush roller 5, which can prevent the brush roller 5 from being pierced and damaged, thereby improving its service life.

[0030] The turntable frame 2 includes two turntables 9 on both sides, which are connected by a connecting rod group 10. The strip hole 3 is set on the turntable 9. The center of the turntable 9 is mounted on the frame 1 through a rotating shaft 11. A hand crank 12 is installed at one end of the rotating shaft 11. According to the production needs, the turntable frame 2 is rotated as a whole by cranking the hand crank 12, thereby rotating the corresponding piercing roller 4 to the working position. The operation is simple and convenient.

[0031] A limiting plate 13 is installed on one side of the frame 1 corresponding to the rotating shaft 11. The limiting plate 13 is provided with a plurality of positioning holes 14 along the circumference. A spring is installed in the hand crank 12 to drive the hand crank 12 to return to the direction of the limiting plate 13. The hand crank 12 is provided with an insertion part corresponding to the positioning hole 14. The insertion part is inserted into the positioning hole 14.

[0032] Before cranking the hand crank 12, it is necessary to pull the hand crank 12 first to disengage the insert part from the positioning hole 14. Only then can the hand crank 12 be cranked. After the piercing roller 4 has completed selection, the hand crank 12 is released, and the spring pushes the insert part to re-insert into the positioning hole 14. However, if the positioning hole 14 and the insert part are misaligned, the insert part cannot be reset, which means that the turntable frame 2 has not rotated to the designed position and needs to be adjusted by the worker. This structure can ensure that the piercing roller 4 can cooperate with the brush roller 5.

[0033] The turntable 9 has several notches along its circumference. A limiting member 15 is installed on the turntable 9 at the position of the notch. The notch and the limiting member 15 together form the strip hole 3. When the piercing roller 4 is pushed away from the brush roller 5, the strip hole 3 provides sufficient space.

[0034] The inner side of the frame 1 is symmetrically equipped with levers 17 driven by cylinders 16. The two ends of the brush roller 5 are respectively installed at the ends of the two levers 17. The other end of the levers 17 is connected to the frame 1 through a tension spring 18. When maintenance or other situations occur and paper needs to be removed from the production line, since the piercing needle on the piercing roller 4 has been inserted into the paper, pulling the paper out directly may damage the piercing needle. The levers 17 driven by cylinders 16 swing, thereby moving the brush roller 5 away from the piercing roller 4. After the paper is removed from the piercing needle, it can be taken out more easily.

[0035] The frame 1 is equipped with a manually rotatable fine-tuning shaft 19. The fine-tuning shaft 19 is provided with a cam structure corresponding to the lever 17, and the lever 17 abuts against the cam structure.

[0036] Furthermore, the diameter of the puncture needle gradually increases from tip to tip. When the hole to be punctured is small, rotating the fine-tuning shaft 19 causes the cam structure to push the lever 17 to swing, thereby causing the brush roller 5 to move slightly away from the puncture roller 4. During production, the paper adheres to the brush roller 5, so the distance between the paper and the puncture needle is greater, and the puncture needle is inserted to a shallower depth, resulting in a smaller puncture hole. Conversely, when a larger hole needs to be punctured, the fine-tuning shaft 19 can be rotated in the opposite direction.

[0037] Furthermore, the fine-tuning shaft 19 can only be adjusted to a limited distance, between 0.2 and 3 millimeters.

[0038] The swing arm assembly 7 includes a rotating rod 20. A first swing arm 8 is mounted on both sides of the rotating rod 20. A second swing arm 21, which is adjustable along the length direction, is mounted on one end of the rotating rod 20. A roller 22 is mounted on the end of the second swing arm 21. The roller 22 abuts against the cam group 6. When the cam group 6 rotates, the roller 22 rolls relative to the outer side of the cam group 6. The second swing arm 21 causes the rotating rod 20 to rotate back and forth. The first swing arm 8 rotates synchronously with the rotating rod 20, thereby lifting or adjusting the piercing roller 4. This achieves precise control of different piercing hole arrangements and meets the requirement of piercing-free areas.

[0039] A reset seat 23 is installed on the outer side of the frame 1 corresponding to the second swing arm 21. A compression spring 24 is installed on the reset seat 23 to push the second swing arm 21 toward the cam group 6. The end of the compression spring 24 abuts against the second swing arm 21. The compression spring 24 is always in a compressed state, that is, it can always push the second swing arm 21 toward the cam group 6, thereby ensuring that the roller 22 abuts against the cam group 6 and avoiding the situation where the cam group 6 rotates to the protruding part and pushes the roller 22 away from the cam group 6, thus affecting the piercing rhythm.

[0040] The cam group 6 consists of at least one layer of cams, with the protruding parts of different layers of cams located at different positions. In this embodiment, the cam group 6 is made of two layers of cams, where the first cam has one protruding structure and the second cam has two identical protruding structures symmetrically arranged. That is, when the first cam rotates one revolution, it can lift the piercing roller 4 once, while when the second cam rotates one revolution, it can lift the piercing roller 4 twice. Compared with the first cam, it can be adapted to a faster production line speed, or it can form two non-piercing areas on a packaging bag, etc.

[0041] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "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 through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] 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.

[0043] 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.

[0044] Although embodiments of the present 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 present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A switchable piercing mechanism comprising a frame (1), characterized in that The frame (1) is equipped with a rotatable turntable frame (2). The turntable frame (2) has several strip holes (3) arranged along the circumference. Different types of piercing rollers (4) are installed in different strip holes (3). The frame (1) is equipped with adjustable brush rollers (5) corresponding to the piercing rollers (4). The frame (1) is equipped with a swing arm assembly (7) that swings back and forth through a cam group (6). The swing arm assembly (7) is located on both sides of the piercing rollers (4) and is equipped with first swing arms (8) that push the piercing rollers (4) away from the brush rollers (5).

2. The switchable lancing mechanism of claim 1, wherein The turntable frame (2) includes turntables (9) on both sides. The two turntables (9) are connected by a linkage group (10). The strip hole (3) is set on the turntable (9). The center of the turntable (9) is mounted on the frame (1) through a rotating shaft (11). A hand crank (12) is installed at one end of the rotating shaft (11).

3. The switchable puncturing mechanism of claim 2, wherein A limiting plate (13) is installed on one side of the frame (1) corresponding to the rotating shaft (11). The limiting plate (13) is provided with a plurality of positioning holes (14) along the circumferential direction. A spring is installed in the hand crank (12) to drive the hand crank (12) to reset towards the limiting plate (13). The hand crank (12) is provided with an insertion part corresponding to the positioning hole (14). The insertion part is inserted into the positioning hole (14).

4. The switchable puncturing mechanism of claim 2, wherein The turntable (9) has several notches along its circumference. A limiting member (15) is installed on the turntable (9) at the position of the notch. The notch and the limiting member (15) together form the strip hole (3).

5. The switchable puncturing mechanism of claim 1, wherein The inner side of the frame (1) is symmetrically equipped with levers (17) driven by cylinders (16). The two ends of the brush roller (5) are respectively installed at the ends of the two levers (17). The other end of the levers (17) is connected to the frame (1) through a tension spring (18).

6. The switchable puncturing mechanism of claim 5, wherein The frame (1) is equipped with a manually rotatable fine adjustment shaft (19), and the fine adjustment shaft (19) is provided with a cam structure corresponding to the lever (17), and the lever (17) abuts against the cam structure.

7. The switchable piercing mechanism according to claim 1, characterized in that... The swing arm assembly (7) includes a rotating rod (20), a first swing arm (8) is mounted on both sides of the rotating rod (20), a second swing arm (21) that can be adjusted along the length direction is mounted on one end of the rotating rod (20), a roller (22) is mounted on the end of the second swing arm (21), and the roller (22) abuts against the cam assembly (6).

8. The switchable puncturing mechanism of claim 7, wherein A reset seat (23) is installed on the outer side of the frame (1) corresponding to the second swing arm (21). A compression spring (24) for pushing the second swing arm (21) toward the cam group (6) is installed on the reset seat (23). The end of the compression spring (24) abuts against the second swing arm (21).

9. The switchable puncturing mechanism of claim 1, wherein The cam assembly (6) consists of at least one layer of cams, with the protrusions of different layers of cams located at different positions.

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