Opening cutting device of bag opening machine

Abstract

The utility model belongs to the technical field of pocket opening machines, and relates to a cutting and opening device of a pocket opening machine, which comprises a sewing machine, a base and a bedplate, a rotating shuttle seat is arranged on the base corresponding to a machine head of the sewing machine, a rotating shuttle cover plate is arranged on the rotating shuttle seat, the rotating shuttle seat is positioned below the bedplate, the rotating shuttle cover plate and the bedplate are positioned on the same plane, and the bedplate is positioned below the sewing machine. A circular cutter assembly is arranged on the rotating shuttle seat in a sliding mode, the circular cutter assembly comprises a cutting motor and a circular cutter driven by the cutting motor to rotate, the rotating shuttle cover plate is provided with an opening groove for the circular cutter to stretch out, a roller matched with the circular cutter is arranged on the machine head in a sliding mode, and the roller compresses cloth on the platen when moving downwards. The cutting and opening device of the bag opening machine has the advantages of being simple in structure, smooth in cutting and low in assembly requirement.

Description

Technical Field

[0001] The utility model belongs to the technical field of bag opening machines and relates to a cutting and opening device of the bag opening machine. Background Art

[0002] The cutting mechanism of a sewing machine is a mechanism for cutting the sewing material entering the sewing machine. The existing cutting mechanism generally cuts the opening by the cooperation of a moving knife and a fixed knife. For example, Chinese invention patent application CN107217402A (publication date: 2017-09-29) discloses a cutting structure of a sewing machine, including a moving knife, a fixed knife frame, a fixed knife rod, and a fixed knife fixed on the fixed knife rod. The fixed knife frame is provided with a driving member 1, which can drive the fixed knife rod to move so that the fixed knife is close to or away from the working surface. When the fixed knife is close to the working surface, the moving knife performs a shearing motion.

[0003] This cutting structure of a combination of a movable knife and a fixed knife often does not cut smoothly, and requires very high assembly accuracy of the movable knife and the fixed knife. When there is an error, it will cause cutting failure. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a cutting and opening device for a bag opening machine, which has the advantages of simple structure, smooth cutting and low assembly requirements.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions:

[0006] A cutting and opening device of a bag opening machine comprises a sewing machine, a base and a table. A hook seat is arranged on the base corresponding to the head of the sewing machine, a hook cover plate is arranged on the hook seat, the hook seat is located below the table, the hook cover plate and the table are located in the same plane, a circular cutter assembly is slidably arranged on the hook seat, the circular cutter assembly comprises a cutting motor and a circular cutter driven to rotate by the cutting motor, an opening groove for the circular cutter to extend out is arranged on the hook cover plate, a roller cooperating with the circular cutter is slidably arranged on the head, and the roller presses the cloth on the table when moving downward.

[0007] In the above-mentioned cutting and opening device of a bag opener, a cylinder mounting plate is fixed on the machine head, a first cylinder is mounted on the cylinder mounting plate, a driving member of the first cylinder is fixedly connected to a roller mounting seat, and the roller is rotatably arranged on the roller mounting seat. Preferably, the roller mounting seat is arranged in a horizontal direction, one end of which is connected to the piston rod of the first cylinder, and the other end is provided with a U-shaped groove for assembling the roller. The first cylinder can also be replaced by other driving devices that can drive up and down movement.

[0008] In the above-mentioned cutting and opening device of a bag opening machine, the cutting motor is mounted on a motor mounting seat, the circular cutter is rotatably mounted on the motor mounting seat via a circular cutter shaft, and the motor shaft of the cutting motor is drivingly connected to the circular cutter shaft. Preferably, the motor mounting seat is a U-shaped seat with one side open, and a protective cover is provided on the open side.

[0009] In the above-mentioned cutting and opening device of a bag opening machine, the circular cutter shaft and the motor shaft are distributed up and down and arranged in parallel, and the motor shaft and the circular cutter shaft are connected by a synchronous belt transmission assembly. The motor shaft and the circular cutter shaft can also be driven by a gear set or other means.

[0010] In the above-mentioned cutting and opening device of a bag opening machine, a circular cutter mounting seat is arranged on one side of the rotary shuttle seat, a vertical slide rail is arranged on the circular cutter mounting seat, a slider is slidably arranged on the slide rail, and the slider is fixedly connected to the motor mounting seat through a slider connecting plate.

[0011] In the above-mentioned cutting and opening device of a bag opener, a cylinder connection block is fixed on the slider connection plate, a second cylinder for driving the cylinder connection block is arranged below the cylinder connection block, and a return spring is arranged between the second cylinder and the cylinder connection block. Preferably, the slider connection plate is an L-shaped plate, one side plate of which is fixedly connected to the slider, and the other side plate is fixedly connected to the motor mounting seat, and a mounting cavity of the cylinder connection block is formed between the two side plates. Preferably, the second cylinder is fixed on the base, and the cylinder connection block can be connected to the driving member of the second cylinder, or a non-connected relative setting can be adopted.

[0012] In the above-mentioned cutting and opening device of a bag opening machine, a positioning baffle is provided on the circular cutter mounting seat, a positioning slide is fixed below the positioning baffle, the cylinder connecting block is slidably set on the positioning slide, and the positioning baffle forms an upper limit structure of the cylinder connecting block.

[0013] In the above-mentioned cutting and opening device of a bag opener, the second cylinder piston rod is spaced apart from the cylinder connecting block, and when the second cylinder piston rod extends to contact the cylinder connecting block, it drives the cylinder connecting block to move upward.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model provides a cutting and opening device for a bag opening machine, which cuts and opens by setting a matching pressing mechanism and a cutting structure. When cutting and opening are required, the cloth is pressed by a downwardly moving roller, and the circular cutter is rotated and cut by an upwardly moving circular cutter. The roller and the circular cutter do not need to be precisely matched, and the method of cutting by the circular cutter is also very smooth. Therefore, the utility model has the advantages of simple structure, smooth cutting, and low assembly requirements, and is particularly suitable for cutting and opening in a bag opening machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is the front view of the utility model;

[0018] Figure 3 It is a partial structural diagram of the utility model;

[0019] Figure numerals: 1, sewing machine; 2, base; 3, table; 4, hook seat; 5, hook cover plate; 6, cutting motor; 7, circular cutter; 8, roller; 9, cylinder mounting plate; 10, first cylinder; 11, roller mounting seat; 12, motor mounting seat; 13, circular cutter mounting seat; 14, slide rail; 15, slider; 16, slider connecting plate; 17, cylinder connecting block; 18, second cylinder; 19, reset spring; 20, positioning baffle; 21, positioning slide rod. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings. Figure 1-3 :

[0021] A cutting and opening device of a bag opening machine comprises a sewing machine 1, a base 2 and a table 3, a rotary hook seat 4 is arranged on the base 2 corresponding to the head of the sewing machine 1, a rotary hook cover plate 5 is arranged on the rotary hook seat 4, the rotary hook seat 4 is located below the table 3, the rotary hook cover plate 5 and the table 3 are located in the same plane, a circular cutter assembly is slidably arranged on the rotary hook seat 4, the circular cutter assembly comprises a cutting motor 6 and a circular cutter 7 driven to rotate by the cutting motor 6, an opening groove is arranged on the rotary hook cover plate 5 for the circular cutter 7 to extend out, a roller 8 cooperating with the circular cutter 7 is slidably arranged on the head, and the roller 8 presses the cloth on the table 3 when moving downward.

[0022] When the bag opening machine is working, the pocket is first sewn by the sewing machine 1, and then the cutting and opening device is used to cut and open. When cutting and opening are required, the roller 8 moves downward to press the cloth on the platen 3, and the circular cutter assembly moves upward until the circular cutter 7 extends from the opening slot to the cutting position, and then the cutting motor 6 is started, and the cutting motor 6 drives the circular cutter 7 to rotate to cut the cloth. When cutting is completed, the roller 8 moves upward to reset, and the circular cutter assembly moves downward to reset.

[0023] In this embodiment, the driving structure of the roller 8 is as follows: a cylinder mounting plate 9 is fixed on the machine head, a first cylinder 10 is mounted on the cylinder mounting plate 9, a driving member of the first cylinder 10 is fixedly connected to a roller mounting seat 11, the roller 8 is rotatably arranged on the roller mounting seat 11, when the piston rod of the first cylinder 10 extends or retracts, the roller mounting seat 11 moves downward or upward accordingly, thereby driving the roller 8 to move downward or upward. Preferably, the roller mounting seat 11 is arranged in the horizontal direction, one end of which is connected to the piston rod of the first cylinder 10, and the other end is provided with a U-shaped groove for assembling the roller 8. The first cylinder 10 can also be replaced by other driving devices that can drive up and down movements.

[0024] In this embodiment, the driving structure of the circular cutter 7 is as follows: the cutting motor 6 is mounted on the motor mounting seat 12, the circular cutter 7 is rotatably mounted on the motor mounting seat 12 via the circular cutter shaft, and the motor shaft of the cutting motor 6 is drivingly connected to the circular cutter shaft. Preferably, the motor mounting seat 12 is a U-shaped seat with one side open, and a protective cover is provided on the open side.

[0025] Furthermore, the circular cutter shaft and the motor shaft are arranged in parallel and arranged vertically, and the motor shaft and the circular cutter shaft are connected by a synchronous belt transmission assembly. When working, the cutting motor 6 is started, and the motor shaft of the cutting motor 6 drives the circular cutter shaft to rotate through the synchronous belt, thereby driving the circular cutter 7 to rotate.

[0026] In this embodiment, the driving structure for the up and down movement of the circular cutter assembly is: a circular cutter mounting seat 13 is provided on one side of the rotary shuttle seat 4, a vertical slide rail 14 is provided on the circular cutter mounting seat 13, a slider 15 is slidably provided on the slide rail 14, and the slider 15 is fixedly connected to the motor mounting seat 12 through a slider connecting plate 16.

[0027] Further, a cylinder connection block 17 is fixed on the slider connection plate 16, a second cylinder 18 for driving the cylinder connection block 17 is arranged below the cylinder connection block 17, and a return spring 19 is arranged between the second cylinder 18 and the cylinder connection block 17. Preferably, the slider connection plate 16 is an L-shaped plate, one side plate of which is fixedly connected to the slider 15, and the other side plate is fixedly connected to the motor mounting seat 12, and a mounting cavity of the cylinder connection block 17 is formed between the two side plates. Preferably, the second cylinder 18 is fixed on the base 2.

[0028] When the piston rod of the second cylinder 18 is extended, the slider connecting plate 16, the slider 15, the motor mounting seat 12, the cutting motor 6, and the circular cutter 7 are driven to move upward synchronously in sequence through the cylinder connecting block 17 until the circular cutter 7 reaches the cutting station, and the reset spring 19 is stretched at the same time. The upward moving distance of the circular cutter 7 can be determined by the moving distance of the piston rod of the second cylinder 18, so as to adapt to various different fabrics. When the piston rod of the second cylinder 18 is retracted, the reset spring 19 drives the cylinder connecting block 17, the slider connecting plate 16, the slider 15, the motor mounting seat 12, the cutting motor 6, and the circular cutter 7 to reset synchronously.

[0029] This embodiment also provides a limiting structure for the circular cutter assembly to prevent the circular cutter assembly from over-limiting movement: a positioning baffle 20 is provided on the circular cutter mounting seat 13, a positioning slide bar 21 is fixed below the positioning baffle 20, the cylinder connecting block 17 is slidably set on the positioning slide bar 21, and the positioning baffle 20 forms an upper limit structure of the cylinder connecting block 17.

[0030] In this embodiment, the second cylinder 18 drives the cylinder connecting block 17 in the following manner: the piston rod of the second cylinder 18 is spaced apart from the cylinder connecting block 17, and when the piston rod of the second cylinder 18 extends to contact with the cylinder connecting block 17, it drives the cylinder connecting block 17 to move upward.

[0031] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cutting and opening device for a bag opening machine, comprising a sewing machine (1), a base (2) and a table (3), wherein a rotary hook seat (4) is arranged on the base (2) corresponding to the head of the sewing machine (1), a rotary hook cover plate (5) is arranged on the rotary hook seat (4), the rotary hook seat (4) is located below the table (3), and the rotary hook cover plate (5) and the table (3) are located on the same plane, characterized in that: A circular cutter assembly is slidably disposed on the rotary shuttle seat (4), the circular cutter assembly comprising a cutting motor (6) and a circular cutter (7) driven to rotate by the cutting motor (6), an opening groove for the circular cutter (7) to extend out is disposed on the rotary shuttle cover plate (5), a roller (8) cooperating with the circular cutter (7) is slidably disposed on the machine head, and the roller (8) presses the cloth on the table plate (3) when moving downward.

2. The cutting and opening device of a bag opening machine according to claim 1, characterized in that: A cylinder mounting plate (9) is fixed on the machine head, a first cylinder (10) is mounted on the cylinder mounting plate (9), a driving member of the first cylinder (10) is fixedly connected to a roller mounting seat (11), and the roller (8) is rotatably arranged on the roller mounting seat (11).

3. The cutting and opening device of a bag opening machine according to claim 1, characterized in that: The cutting motor (6) is mounted on a motor mounting seat (12), the circular cutter (7) is rotatably arranged on the motor mounting seat (12) via a circular cutter shaft, and the motor shaft of the cutting motor (6) is drivingly connected to the circular cutter shaft.

4. The cutting and opening device of a bag opening machine according to claim 3, characterized in that: The circular cutter shaft and the motor shaft are distributed up and down and arranged in parallel, and the motor shaft and the circular cutter shaft are transmission connected through a synchronous belt transmission assembly.

5. The cutting and opening device of a bag opening machine according to claim 3, characterized in that: A circular cutter mounting seat (13) is provided on one side of the rotary shuttle seat (4); a vertical slide rail (14) is provided on the circular cutter mounting seat (13); a slider (15) is slidably provided on the slider rail (14); and the slider (15) is fixedly connected to the motor mounting seat (12) via a slider connecting plate (16).

6. The cutting and opening device of a bag opening machine according to claim 5, characterized in that: A cylinder connection block (17) is fixed on the slider connection plate (16), a second cylinder (18) for driving the cylinder connection block (17) is arranged below the cylinder connection block (17), and a return spring (19) is arranged between the second cylinder (18) and the cylinder connection block (17).

7. The cutting and opening device of a bag opening machine according to claim 6, characterized in that: A positioning baffle (20) is arranged on the circular cutter mounting seat (13), a positioning slide bar (21) is fixed below the positioning baffle (20), the cylinder connecting block (17) is slidably arranged on the positioning slide bar (21), and the positioning baffle (20) forms an upper limit structure of the cylinder connecting block (17).

8. The cutting and opening device of a bag opening machine according to claim 6, characterized in that: The piston rod of the second cylinder (18) is spaced apart from the cylinder connecting block (17), and when the piston rod of the second cylinder (18) extends to contact with the cylinder connecting block (17), it drives the cylinder connecting block (17) to move upward.

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