Bag clamping device capable of moving forwards

Abstract

The invention discloses a bag clamping device capable of moving forwards, and belongs to the technical field of packaging equipment. The device comprises a bag clamp body, a machine base, a driving unit, a guide rail sliding block mechanism and a connecting rod transmission mechanism. The base is mounted on the top plate of the rack; the driving unit and the fixed part of the guide rail are mounted on the base; the bag clamp body is in sliding connection with the machine base through a guide rail sliding block mechanism. The driving unit comprises a servo motor and a speed reducer, and an output shaft of the speed reducer is connected with a crank. The two ends of the connecting rod are hinged to the crank and the bag clamp body through the rod end knuckle bearings respectively, rotating motion is converted into linear reciprocating motion of the bag clamp body, and therefore the bag clamp can be switched between a normal automatic station and a forward moving station facilitating manual operation when a fault occurs. The guide rail sliding block mechanism adopts a circular guide rail to be matched with a roller assembly, and a lower roller adopts eccentric wheel design to eliminate gaps. The automatic bag feeding machine solves the problem that the automatic bag feeding machine needs to be shut down for maintenance when breaking down, achieves the purpose that production is not stopped when shut down, guarantees production continuity, and is accurate in movement, stable in operation and good in sealing performance.

Description

Technical Field

[0001] This invention belongs to the technical field of bag-loading machine equipment and relates to a bag clamping device that can move forward. Background Technology

[0002] In fully automated packaging production lines, the fully automatic bagging machine is one of the key pieces of equipment for achieving efficient packaging. It typically uses a robotic arm to grip the packaging bags and complete the bagging action. However, when the automatic bagging function of the bagging machine malfunctions, repairs often take time. Stopping the entire production line as a result will cause the upstream feeding equipment to shut down simultaneously, leading to production interruptions, reduced efficiency, and economic losses. Customer sites (such as the COFCO malt fully automated packaging project in Jiangyin) have expressed an urgent need for maintenance without shutting down the entire line.

[0003] Existing bag clamping devices are typically designed as fixed units, with their positions optimized for robotic arm operation. If the automatic function fails and manual intervention is required, the fixed bag clamps are ergonomically unsound, offering limited operating space and significantly increasing the difficulty and danger of manual bagging, rendering them unsuitable as an effective emergency solution. Therefore, there is an urgent need for a bag clamping device that can quickly switch to manual mode when the automatic mode fails. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a forward-moving bag clamp device. When the automatic bagging function is working normally, the device is located in the original working position and works with the robot arm. When the automatic function fails, the entire bag clamp can be moved forward to a position that is convenient for manual operation, so that manual bagging can be carried out smoothly. This ensures the continuous operation of the production line during robot arm maintenance, achieving "production without stopping the machine".

[0005] According to the technical solution of the present invention: a forward-moving bag clamp device, characterized in that: it includes a bag clamp body, a base, a drive unit, a guide rail slider mechanism, and a linkage transmission mechanism; The base is mounted on the top plate of the frame, the drive unit is mounted on the base, and the bag clip body is mounted on the guide rail slider mechanism, so that the bag clip body can move back and forth along the guide rail of the guide rail slider mechanism under the action of the drive unit. The drive unit includes a servo motor and a reducer driven by the servo motor, and a crank is mounted on the output shaft of the reducer; The linkage transmission mechanism includes a connecting rod and spherical bearings connected to its two ends. The spherical bearings include a first rod end spherical bearing and a second rod end spherical bearing. The connecting rod is hinged to the crank via the first rod end spherical bearing and to the bag clamp body via the second rod end spherical bearing. The crank is driven to rotate by the drive unit, and the rotational motion is converted into linear reciprocating motion of the bag clamp body along the guide rail by the connecting rod transmission mechanism.

[0006] As a further improvement of the present invention, the guide rail slider mechanism includes guide rails and roller assembly. Two guide rails arranged parallel to each other are installed on the top plate of the frame, and the bag clip body slides with the guide rails through the roller assembly installed on its upper part. The roller assembly includes an upper roller and a lower roller. The upper roller is a concentric circular roller used to support the bag clip body. The lower roller is an eccentric circular roller used to adjust the fit with the circular guide rail.

[0007] As a further improvement of the present invention, the roller assembly further includes a roller shaft, a spacer, a deep groove ball bearing, a gasket, and a fixing member; The upper roller and the lower roller are each supported by two deep groove ball bearings, which are separated by a spacer and are mounted as a whole on the roller shaft.

[0008] As a further improvement of the present invention, the roller shaft includes a concentric roller shaft and an eccentric roller shaft, wherein the concentric roller shaft is used to rotatably support the upper roller, and the eccentric roller shaft is used to rotatably support the lower roller.

[0009] As a further improvement of the present invention, the fastener includes a retaining ring for the hole, a hexagonal bolt, a flat washer, and a spring washer; For each roller assembly mounted on the roller shaft, the outer ring of the deep groove ball bearing at its axial outer end is limited to the roller by the hole using an elastic retaining ring; the inner ring of the deep groove ball bearing on its outer side is axially limited by the hexagonal bolt, flat washer, and spring washer.

[0010] As a further improvement of the invention, a cable chain system is also included, the cable chain system comprising a cable chain, a cable chain frame, and a support for organizing and protecting the tubing as the bag clamp body moves; One end of the cable chain is fixed to a bracket, which is fixed to the frame by a mounting bracket, and the other end of the cable chain is fixed to the bag clamp body.

[0011] As a further improvement of the present invention, it also includes a photoelectric sensor for detecting the origin position of the bag clip body. The transmitting end of the photoelectric sensor is mounted on the top plate of the frame via a mounting plate, and the receiving end of the photoelectric sensor is mounted on the bag clip body via a fixing plate.

[0012] As a further improvement of the present invention, a sealing structure is also included, which includes a silicone plate and a pressure plate, disposed in the gap between the bag clamp body and the top plate of the frame, for sealing the gap to prevent material spillage.

[0013] The technical advantages of this invention are as follows: The invention has a reasonable and ingenious structure, providing a reliable automatic / manual mode switching solution. In the event of a malfunction in the automatic bagging machine, manual bagging can be initiated by moving the bag clamp forward, ensuring the production line remains operational and resolving the conflict between production and maintenance. The forward-moved bag clamp position facilitates safe and labor-saving bagging operations for operators, improving the feasibility and efficiency of emergency operations. The use of a servo motor drive combined with a crank-slider mechanism and photoelectric sensor positioning ensures the repeatability accuracy of the bag clamp's forward and return positions, guaranteeing accurate return to the required position for automatic bagging each time. The slider mechanism, combining a circular guide rail and upper and lower rollers (concentric upper, eccentric lower), is robust. Pre-tension adjustment via the eccentric wheel eliminates gaps, resulting in smooth movement and strong load-bearing capacity, making it suitable for industrial environments. A dedicated sealing structure and drag chain system prevent material leakage and contamination, protect moving pipelines, and improve the overall reliability and aesthetics of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention.

[0015] Figure 2 for Figure 1 The left view.

[0016] Figure 3 This is a schematic diagram of the installation of the concentric roller shaft.

[0017] Figure 4 This is a schematic diagram of the installation of the silicone plate and pressure plate.

[0018] Figure 5 This is a schematic diagram of the bag clip body mounted on the guide rail.

[0019] Figure 6 for Figure 5 Sectional view along the AA direction. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] Figure 1-6The components include: bag clamp body 1, base 2, crank 3, guide rail 4, bearing seat 5, connecting rod 6, first rod end spherical bearing 7, second rod end spherical bearing 8, mounting base 9, servo motor 10, reducer 11, roller 12, concentric roller shaft 13, spacer 14, deep groove ball bearing 15, gasket 16, flat washer 17, spring washer 18, hex nut 19, eccentric roller shaft 20, elastic retaining ring for hole 21, bracket 22, cable chain bracket 23, hex bolt 24, flat washer 25, spring washer 26, cable chain 27, mounting bracket 28, mounting plate 29, fixing plate 30, silicone plate 31, pressure plate 32, etc.

[0023] like Figure 1-6 As shown, the present invention is a forward-moving bag clamping device, the main body of which is installed on the frame of a fully automatic bag feeding machine, including a bag clamping body 1, a base 2, a drive unit, a guide rail slider mechanism, and a linkage transmission mechanism.

[0024] The base 2 is mounted on the top plate of the frame, the drive unit is mounted on the base 2, and the bag clamp body 1 is mounted on the guide rail slider mechanism, so that the bag clamp body 1 can move back and forth along the guide rail 4 of the guide rail slider mechanism under the action of the drive unit. This enables the bag clamp body 1 to move between two preset stations: the rear "automatic bagging station" and the front "manual bagging station".

[0025] The drive unit includes a servo motor 10 and a reducer 11 driven by the servo motor 10. A crank 3 is mounted on the output shaft of the reducer 11. The crank 3 is fixedly mounted on the output shaft to ensure that the crank 3 rotates synchronously with the output shaft.

[0026] The linkage transmission mechanism includes a connecting rod 6 and joint bearings connected to its two ends. The joint bearings include a first rod end joint bearing 7 and a second rod end joint bearing 8. The connecting rod 6 is hinged to the crank 3 through the first rod end joint bearing 7 and to the bag clamp body 1 through the second rod end joint bearing 8.

[0027] In practice, the first rod end spherical bearing 7 is a standard part of model SIJK20C×1.5, and the second rod end spherical bearing 8 is a standard part of model SILJK20C×1.5 with a left-hand thread. This left-hand and right-hand thread matching design can effectively prevent the connection from loosening during long-term reciprocating motion.

[0028] The crank 3 is driven to rotate by the drive unit, and the rotational motion is converted into linear reciprocating motion of the bag clamp body 1 along the guide rail by the linkage transmission mechanism.

[0029] The guide rail slider mechanism includes guide rails 4 and roller assemblies. Two parallel guide rails 4 are mounted on the top plate of the frame. The bag clip body 1 slides with the guide rails 4 through the roller assemblies mounted on its upper part. In practice, four sets of roller assemblies are installed on the bag clip body 1, and the four sets of roller assemblies are distributed at the four upper corners of the bag clip body 1. The roller assembly includes an upper roller and a lower roller. The upper roller is a concentric circular roller used to support the bag clip body 1. The lower roller is an eccentric circular roller 20 used to adjust the fit with the circular guide rails 4.

[0030] Furthermore, the roller assembly also includes a roller shaft, a spacer 14, a deep groove ball bearing 15, a gasket 16, and a fastener.

[0031] The upper and lower rollers are each supported by two deep groove ball bearings 15, which are spaced apart by a spacer 14 and are integrally mounted on the roller shaft. The spacer 14 is used to precisely separate the two bearings, ensuring uniform load distribution and accurate positioning of the internal clearance.

[0032] The roller shaft includes a concentric roller shaft 13 and an eccentric roller shaft 20, wherein the concentric roller shaft 13 is used to rotatably support the upper roller, and the eccentric roller shaft 20 is used to rotatably support the lower roller.

[0033] The fasteners include a retaining ring 21 for the hole, a hex bolt 24, a flat washer 25, and a spring washer 26.

[0034] For each roller assembly mounted on the roller shaft, the outer ring of the deep groove ball bearing 15 at its axial outer end is limited to the roller by the elastic retaining ring 21 through the hole; the inner ring of the deep groove ball bearing 15 on its outer side is axially limited by the hexagonal bolt 24, flat washer 25 and spring washer 26.

[0035] It also includes a cable chain system, which includes a cable chain 27, a cable chain frame 23, and a support 22, for organizing and protecting the tubing as the bag clamp body 1 moves.

[0036] One end of the drag chain 27 is fixed to the bracket 22, which is fixed to the frame by the mounting bracket 28, and the other end of the drag chain 27 is fixed to the bag clamp body 1.

[0037] It also includes a photoelectric sensor for detecting the origin position of the bag clamp body 1. The transmitter of the photoelectric sensor is mounted on the top plate of the frame via a mounting plate 29, and the receiver of the photoelectric sensor is mounted on the bag clamp body 1 via a fixing plate 30. When the bag clamp body 1 moves to the "automatic bagging station", the baffle installed on it will enter the sensing area of ​​the photoelectric sensor and trigger a signal. This signal is fed back to the control system as a key basis for confirming the motion origin and position closed-loop control.

[0038] It also includes a sealing structure, which comprises a silicone plate 31 and a pressure plate 32, disposed at the gap between the bag clamp body 1 and the top plate of the frame, to seal the gap and prevent material spillage. The silicone plate 31 is installed on the side of the bag clamp body 1 near the top plate via the pressure plate 32, and its free edge maintains sliding contact with the surface of the top plate of the frame throughout the entire moving stroke of the bag clamp body 1, thereby achieving a continuous and effective seal for the gap.

[0039] The working principle and operation process of this invention: Normal automatic mode: The control system controls the servo motor 10 to keep the bag clamp body 1 stably positioned at the rear "automatic bagging station". At this time, the robotic arm of the bag feeding machine performs the bag picking and bagging actions to complete the fully automatic packaging process.

[0040] Emergency Switching Mode: When the automatic bag-loading mechanism malfunctions, the control system issues a command. The servo motor 10 starts, driving the crank 3 to rotate via the reducer 11. The rotational motion of the crank 3 is converted into a pushing and pulling force on the bag clamp body 1 via the connecting rod 6 and the first rod end spherical bearing 7 and the second rod end spherical bearing 8. Guided by its roller assembly, the bag clamp body 1 moves smoothly forward along the guide rail 4 until it reaches the preset "manual bagging station" and stops. The operator can then safely and conveniently perform manual bagging operations at this ergonomically designed forward position, ensuring continuous operation of the production line during maintenance.

[0041] Restore automatic mode: After the automatic bag feeding function is restored, the control system instructs the servo motor 10 to move in the reverse direction, driving the bag clamp body 1 to precisely return to the "automatic bagging station" along the circular guide rail 4. When the bag clamp body 1 arrives, the photoelectric sensor is triggered, generating a positioning signal and completing the system origin reset. The equipment then switches back to fully automatic operation mode.

[0042] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A forward-moving bag clamp device, characterized in that: It includes a bag clip body (1), a base (2), a drive unit, a guide rail slider mechanism, and a linkage transmission mechanism; The base (2) is mounted on the top plate of the frame, the drive unit is mounted on the base (2), and the bag clip body (1) is mounted on the guide rail slider mechanism, so that the bag clip body (1) can move back and forth along the guide rail (4) of the guide rail slider mechanism under the action of the drive unit. The drive unit includes a servo motor (10) and a reducer (11) driven by the servo motor (10), and a crank (3) is mounted on the output shaft of the reducer (11). The linkage transmission mechanism includes a connecting rod (6) and joint bearings connected to its two ends. The joint bearings include a first rod end joint bearing (7) and a second rod end joint bearing (8). The connecting rod (6) is hinged to the crank (3) through the first rod end joint bearing (7) and to the bag clamp body (1) through the second rod end joint bearing (8). The crank (3) is driven to rotate by the drive unit, and the rotational motion is converted into linear reciprocating motion of the bag clamp body (1) along the guide rail by the linkage transmission mechanism.

2. The forward-movable bag clamp device as described in claim 1, characterized in that: The guide rail slider mechanism includes a guide rail (4) and a roller assembly. Two parallel guide rails (4) are mounted on the top plate of the frame. The bag clip body (1) slides with the guide rail (4) through the roller assembly mounted on its upper part. The roller assembly includes an upper roller and a lower roller. The upper roller is a concentric circular roller used to support the bag clip body (1). The lower roller is an eccentric circular roller (20) used to adjust the fit with the circular guide rail (4).

3. The forward-movable bag clamp device as described in claim 2, characterized in that: The roller assembly also includes a roller shaft, a spacer (14), a deep groove ball bearing (15), a gasket (16), and a fastener; The upper roller and the lower roller are supported by two deep groove ball bearings (15), which are separated by a spacer (14) and are mounted on the roller shaft as a whole.

4. The forward-movable bag clamp device as described in claim 3, characterized in that: The roller shaft includes a concentric roller shaft (13) and an eccentric roller shaft (20), wherein the concentric roller shaft (13) is used to rotatably support the upper roller, and the eccentric roller shaft (20) is used to rotatably support the lower roller.

5. The forward-movable bag clamp device as described in claim 3, characterized in that: The fasteners include a retaining ring (21) for holes, a hex bolt (24), a flat washer (25) and a spring washer (26); For each roller assembly mounted on the roller shaft, the outer ring of the deep groove ball bearing (15) at its axial outer end is limited to the roller by the elastic retaining ring (21) in the hole; the inner ring of the deep groove ball bearing (15) on its outer side is axially limited by the hexagonal bolt (24), flat washer (25) and spring washer (26).

6. The forward-movable bag clamp device as described in claim 1, characterized in that: It also includes a cable chain system comprising a cable chain (27), a cable chain frame (23), and a support (22) for organizing and protecting the tubing as the bag clamp body (1) moves; One end of the drag chain (27) is fixed to the bracket (22), which is fixed to the frame by the mounting bracket (28), and the other end of the drag chain (27) is fixed to the bag clamp body (1).

7. The forward-movable bag clamp device as described in claim 1, characterized in that: It also includes a photoelectric sensor for detecting the origin position of the bag clip body (1). The transmitting end of the photoelectric sensor is mounted on the top plate of the frame via a mounting plate (29), and the receiving end of the photoelectric sensor is mounted on the bag clip body (1) via a fixing plate (30).

8. The forward-movable bag clamp device as described in claim 1, characterized in that: It also includes a sealing structure, which includes a silicone plate (31) and a pressure plate (32) and is disposed in the gap between the bag clamp body (1) and the top plate of the frame to seal the gap and prevent material from spilling out.

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