Header card device for paper bag machine

Abstract

The invention discloses a header card device for a paper bag machine, comprising a paper feeding mechanism, a header card mechanism and a material discharge rack. The header card mechanism is used for adsorbing the header card in the material discharge rack and transferring the header card to a conveyor line. The invention is characterized in that the header card mechanism comprises a cam, a rotating main shaft, and a turntable driven by the rotating main shaft to rotate coaxially, a support rod for installing a suction nozzle is provided on the turntable, a swing arm A and a swing arm B are provided on the support rod, the swing arm A is rotatably connected to the support rod, the swing arm B is transmission-connected to the support rod, the swing arm A is connected to the turntable through a fulcrum, the cam is fixedly arranged relative to the turntable, the swing arm A is provided with a roller A, the cam is provided with a working track for the roller A to move, the swing arm B is provided with a roller B, the turntable is provided with a curved track for the roller B to move, the suspension, lifting and acceleration of the suction nozzle are all completed by a purely mechanical structure, and the invention has the characteristics of stable and uniform card sticking accuracy under any acceleration, deceleration and inching conditions.

Description

Technical Field

[0001] The invention relates to a paper bag machine, in particular to a header card device of the paper bag machine. Background Art

[0002] String bags are commonly used in daily life, such as shopping bags. In order to make the paper bag bear more weight after being tied with a string, one or two reinforcing papers are usually attached to the mouth of the paper bag, commonly known as head cards. In the prior art, the nozzle hovering and acceleration and catching up are completed by the variable speed servo to perform variable speed movement, and the lifting action of the nozzle when hovering is completed by the solenoid valve and a mechanism similar to a cylinder. This solution has low accuracy and stability when the equipment is accelerated, decelerated, and inch-moved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a head card sticking device for a paper bag machine, which has the characteristics of stable and uniform card sticking accuracy under any acceleration, deceleration and inching conditions.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a header card device of a paper bag machine comprises a paper feeding mechanism, a header card mechanism and a discharge rack, the paper feeding mechanism forms a conveyor line for conveying semi-finished bag paper, the header card mechanism is used to absorb the header card in the discharge rack and transfer the header card to the conveyor line, and is characterized in that the header card mechanism comprises a cam, a rotating main shaft, and a turntable driven by the rotating main shaft to rotate coaxially, the turntable is provided with a support rod for installing a suction nozzle, the support rod is provided with a swing arm A and a swing arm B, the swing arm A is rotatably connected to the support rod, the swing arm B is transmission-connected to the support rod, the swing arm A is connected to the turntable through a fulcrum, the cam is fixed relative to the turntable, the swing arm A is provided with a roller A, the cam is provided with a working track for roller A to move, the swing arm B is provided with roller B, and the turntable is provided with a curved track for roller B to move.

[0005] A shock absorber is arranged at the end of the curved track.

[0006] The edge of the rotating disk is provided with a notch for accommodating the support rod to make way.

[0007] The rotation of the turntable drives roller A to move in the working track of the cam, drives swing arm A to swing, and then drives the support rod to move, so that the suction nozzle can extend to suck when sucking the head card from the material rack, avoiding the phenomenon that the suction nozzle cannot suck the head card due to distance problems; in the process of swing arm A swinging to drive the suction nozzle to extend to suck the head card, the swinging of swing arm B is to adjust the direction of the suction nozzle, and swing arm B drives roller B to move in the curved track, so that the suction nozzle always maintains the direction of the head card perpendicular to the head card during the process of sucking the head card, preventing the suction nozzle from changing its angle under the drive of the turntable, resulting in failure of head card suction. The servo motor of the present invention is only used to drive the turntable to rotate at a constant speed, while the hovering, lifting and acceleration of the suction nozzle are all completed by a purely mechanical structure, and has the characteristics of stable and uniform card sticking accuracy under any acceleration, deceleration and inching conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the present invention;

[0009] Figure 2 This is a schematic diagram of the present invention without the cam structure;

[0010] Figure 3 for Figure 2 Side view;

[0011] Figure 4 Schematic diagram of the cam structure. DETAILED DESCRIPTION

[0012] Referring to the accompanying drawings, the header card device of the paper bag machine includes a paper feeding mechanism, a header card mechanism and a discharge rack. The paper feeding mechanism forms a conveyor line for conveying semi-finished bag paper. The conveyor line can be a conveyor belt or other conveying methods. The header card mechanism is used to absorb the header card in the discharge rack and transfer the header card to the conveyor line to be attached to the semi-finished bag paper.

[0013] The head-attaching card mechanism includes a cam 1, a motor 2, a rotating spindle 3 driven by the motor, and a turntable 4 driven by the rotating spindle to rotate coaxially. The turntable 4 is arranged at both ends of the rotating spindle 3, and the cam 1 is arranged on the outside of the turntable 4. The turntable 4 is provided with a support rod 6 for installing a suction nozzle 5, that is, the rotation of the turntable 4 drives the support rod 6 to rotate accordingly, and the support rod 6 is provided with a swing arm A 7 and a swing arm B 8.

[0014] The swing arm A is rotatably connected to the support rod, and a bearing is provided between the swing arm A and the support rod, that is, the swing arm A and the support rod are movably connected, and the swing arm B is transmission-connected to the support rod, that is, the swing arm B and the support rod are fixedly connected, and the rotation of the swing arm B will drive the support rod to rotate, thereby adjusting the direction of the suction nozzle on the support rod.

[0015] The swing arm A7 is connected to the turntable 4 via a fulcrum 9, the cam 1 is fixed relative to the turntable 4, the swing arm A7 is provided with a roller A10, and the cam 1 is provided with a working track 11 for the roller A to move. The rotation of the turntable drives the roller A to move in the working track of the cam.

[0016] In this embodiment, the edge of the turntable 4 is provided with a notch for accommodating the support rod to make way, and the notch is divided into a notch A 14 and a notch B 15. The notch A 14 is for accommodating the support rod 6 in the initial state, and the notch B 15 is for accommodating the support rod 6 that has swung to the end point.

[0017] The working track of the cam 1 has a proximal end. In the process of roller A moving toward the proximal end, the distance between roller A and the axis gradually decreases, and the swing arm A starts to swing to the other side, driving the suction nozzle to extend outward during the swinging process; when roller A reaches the proximal end, the suction nozzle extends outward the farthest to absorb the head card, and after absorbing the head card, the swing arm A swings to the end point and is accommodated in the notch B, so that the suction nozzle retracts to make way; when roller A leaves the proximal end, the distance between roller A and the axis increases, and the swing arm A swings back to the notch A to reset, preparing for the next head card absorption work.

[0018] The swing arm B 8 is provided with a roller B, and the turntable 4 is provided with a curved track 12 for roller B to move. When the distance between roller A and the axis begins to decrease (i.e., the suction nozzle begins to extend), roller B begins to move toward the end of the curved track. When the distance between roller A and the axis begins to increase, roller B is reset. In the process of swing arm A swinging to drive the suction nozzle to extend outward to absorb the head card, the swing arm B swings to adjust the direction of the suction nozzle, and the swing arm B swings to drive roller B to move toward the end of the curved track, so that the suction nozzle always maintains the direction of the suction head card perpendicular to the head card during the process of absorbing the head card, preventing the suction nozzle from changing its angle under the drive of the turntable, resulting in failure of head card absorption.

[0019] A shock absorber 13 is provided at the end of the curved track 12. When the roller B moves to the end of the curved track, that is, when the suction nozzle extends the farthest to absorb the head card, the shock absorber can buffer and slow down the roller B to ensure that the suction nozzle can stably absorb the head card.

[0020] Preferably, two or more groups of support rods are evenly arranged on the turntable along the circumferential direction, each group of support rods is provided with a group of suction nozzles, and the structure of each group is the same, that is, each group of support rods is provided with a swing arm A and a swing arm B, the swing arm A is provided with a roller A, and the swing arm B is provided with a roller B, and correspondingly, two or more curved tracks are provided on the turntable, so that the head card adsorption work can be performed twice or more times when the turntable makes one circle.

Claims

1. The header card device of the paper bag machine includes a paper feeding mechanism, a header card mechanism and a material unloading rack. The paper feeding mechanism forms a conveying line for conveying semi-finished bag paper. The header card mechanism is used to absorb the header card in the material unloading rack and transfer the header card to the conveying line. It is characterized in that: The head card mechanism includes a cam, a rotating main shaft, and a turntable driven by the rotating main shaft to rotate coaxially, the turntable is provided with a support rod for installing a suction nozzle, the support rod is provided with a swing arm A and a swing arm B, the swing arm A is rotatably connected to the support rod, the swing arm B is transmission connected to the support rod, the swing arm A is connected to the turntable through a fulcrum, the cam is fixed relative to the turntable, the swing arm A is provided with a roller A, the cam is provided with a working track for roller A to move, the swing arm B is provided with roller B, and the turntable is provided with a curved track for roller B to move.

2. The header card device of the paper bag machine according to claim 1, characterized in that: A shock absorber is arranged at the end of the curved track.

3. The header card device of the paper bag machine according to claim 1, characterized in that: The edge of the rotating disk is provided with a notch for accommodating the support rod to make way.

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