Sealing device for wire harness packaging bag

Abstract

The present invention discloses a sealing device for a wire harness packaging bag, comprising a swing arm hinged on a workbench, a cable for driving the swing arm to swing, a pressure strip installed at the free end of the swing arm, and a heating strip installed on the workbench, wherein the heating strip is installed in a heating strip seat, the heating strip seat is connected to the piston rod of a vertical cylinder, the vertical cylinder is installed at the bottom of the workbench, a solenoid valve is arranged on the connection channel between the vertical cylinder and the air source, the solenoid valve is electrically connected to a bimetallic switch, and the heating strip is electrically connected to the bimetallic switch. The opening of a plastic bag containing a wire harness is placed on the heating strip, the pressure strip descends and presses on the opening of the plastic bag, the heating strip is connected to a power source, the heating strip generates heat, and the opening of the plastic bag is sealed. The bimetallic strip is deformed by heat, the solenoid valve is energized, the piston rod and the heating strip seat descend, and the heating strip is separated from the opening of the plastic bag, thereby preventing the heating strip from overheating the opening of the plastic bag.

Description

Technical Field

[0001] The invention relates to the field of wire harness cables, and in particular to packaging equipment for wire harnesses. Background Art

[0002] Wire harnesses or cables need to be bagged before leaving the factory, and the plastic bags need to be sealed. Commonly used sealing equipment includes heating strips and pressure strips. The plastic bag opening is placed between the heating strips and the pressure strips. The pressure strips descend and clamp the plastic bag opening with the heating strips. The heating strips melt the plastic bag, so that the plastic bag opening is closed due to adhesion. If the plastic bag opening is in contact with the heating strips for too long, it may be broken due to excessive melting, and the sealing effect cannot be achieved. Summary of the invention

[0003] The technical problem solved by the present invention is that if the contact time between the opening of the plastic bag encapsulating the wiring harness or cable and the heating strip is too long, cracks may be generated due to excessive melting, and the sealing effect cannot be achieved.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a sealing device for a wire harness packaging bag, comprising a rocker arm hinged on a workbench, a cable for driving the rocker arm to swing, a pressure strip installed at the free end of the rocker arm, and a heating strip installed on the workbench, the heating strip being installed in a heating strip seat, the heating strip seat being connected to the piston rod of a vertical cylinder, the vertical cylinder being installed at the bottom of the workbench, an electromagnetic valve being arranged on the connecting channel between the vertical cylinder and the air source, the electromagnetic valve being electrically connected to a bimetallic switch, and the heating strip being electrically connected to the bimetallic switch; a contact switch being arranged on the workbench, the pressure strip at the bottom of the rocker arm being able to act on the contact switch to close it, and when the contact switch is closed, when the bimetallic strip of the bimetallic strip switch is in a cold state, the heating strip is connected to a power supply, and after the bimetallic strip is deformed by heat, the electromagnetic valve is connected to the power supply, and at the same time, the heating strip is disconnected from the power supply.

[0005] According to the above technical solution, the worker places the plastic bag mouth with the wiring harness on the heating strip, pulls the cable, and the cable drives the swing rod to swing down, the pressure strip descends, and presses on the plastic bag mouth. At the same time, the pressure strip presses the contact switch to close it, and the heating strip is connected to the power supply, the heating strip heats up, and the plastic bag mouth is closed. When the heating strip heats up, the bimetallic strip is deformed by heat. When the heating strip is disconnected from the power supply, the solenoid valve is energized, and the air source rushes high-pressure air into the vertical cylinder. The piston rod and the heating strip seat descend, so that the heating strip is separated from the plastic bag mouth, and the heating strip is prevented from overheating the plastic bag mouth.

[0006] The rocker arm swings up to reset, the contact switch is disconnected, the solenoid valve loses power, the vertical cylinder resets, the heating strip seat rises to reset, and the bimetallic strip cools to reset.

[0007] The power supply is equipped with a starting switch, which is equivalent to the main switch. After the starting switch is closed, the power supply can supply power to the heating strip and the vertical cylinder, and the heating strip and the vertical cylinder can work normally in sequence.

[0008] The workbench is provided with strip-shaped through holes in the up-and-down directions, the heating strip seat is matched in the strip-shaped through holes, and the top part protrudes upward from the workbench surface.

[0009] The free end of the swing rod is hinged with a drooping plate, the bottom end of the drooping plate is provided with a bayonet, the section of the layer strip is T-shaped, the vertical wall of the layer strip is clamped in the bayonet and fixed with the drooping plate by a locking screw.

[0010] Square positioning blocks are provided at both ends of the pressure strip, and a buffer positioning assembly is provided on the workbench. The buffer positioning assembly is located at both ends of the heating strip seat. The buffer positioning assembly includes a vertical guide rod fixed on the workbench, a spring and a lifting block sleeved on the vertical guide rod, and the lifting block is located above the spring; a limit seat is provided on the workbench, and a limit bolt is screwed on the limit seat, and the limit bolt is located below the lifting block; the swing arm swings down, and the square positioning block can be against the lifting block, and the contact switch is located below the lifting block. When the swing arm swings down, the square positioning block first contacts the lifting block, and the lifting block descends along the vertical guide rod to compress the spring. After that, the lifting block acts on the contact switch to close it, and the pressure strip presses the plastic bag opening onto the heating strip. The spring plays a buffering role on the pressure strip, so that the pressure strip can steadily press the plastic bag opening, which is conducive to improving the sealing quality. The limit bolt limits the minimum height of the lifting block to prevent the pressure strip from excessively pressing the plastic bag opening. Among them, the square positioning block contacts the lifting block, which can guide the pressure strip so that the pressure strip can clamp the plastic bag opening face to face with the heating strip.

[0011] There is a pair of swing rods, each of which is connected to a crossbar through a cable. The crossbar is located under the workbench, and the crossbar is connected to the main cable, which is connected to the pedal. The pedal is hinged on the bracket, and the bracket is connected to the workbench leg. The pedal is equipped with a reset spring. When the worker steps on the pedal, the main cable and the cable are pulled to make the swing rod swing down. When the worker releases the pedal, the reset spring releases the elastic potential energy, causing the cable to rise and reset, and the swing rod swings up and reset. The cable is made of steel bars.

[0012] The present invention can effectively prevent the opening of the plastic bag encapsulating the wiring harness from being in contact with the heating strip for too long, thereby ensuring the sealing effect and improving the sealing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings:

[0014] Figure 1 A schematic diagram of a sealing device for a wire harness packaging bag;

[0015] Figure 2 for Figure 1 A schematic diagram of the middle buffer positioning assembly 50;

[0016] Figure 3 for Figure 1Right view of;

[0017] Figure 4 The figure is a circuit diagram of a sealing device for a wire harness packaging bag.

[0018] Explanation of symbols in the figure:

[0019] 10. Workbench; 11. Strip-shaped through hole; 12. Workbench legs;

[0020] 20. swing rod; 21. drooping plate; 210. bayonet; 22. sub-cable; 23. crossbar; 24. main cable; 25. pedal; 26. bracket; 27. return spring;

[0021] 30. Layering strip; 31. Square positioning block;

[0022] 40. Heating strip; 41. Heating strip seat; 42. Vertical cylinder; 43. Solenoid valve; 44. Bimetal switch; 45. Contact switch; 46. Start switch;

[0023] 50. Buffer positioning assembly; 51. Vertical guide rod; 52. Spring; 53. Lifting block; 54. Limit seat; 55. Limit bolt. DETAILED DESCRIPTION

[0024] like Figure 1 , Figure 4 The sealing device of the wiring harness packaging bag includes a swing arm 20 hinged on a workbench 10, a cable for driving the swing arm to swing, a pressure strip 30 installed at the free end of the swing arm, and a heating strip 40 installed on the workbench. The heating strip is installed in a heating strip seat 41, and the heating strip seat is connected to the piston rod of a vertical cylinder 42. The vertical cylinder is installed at the bottom of the workbench. A solenoid valve 43 is arranged on the connection channel between the vertical cylinder and the air source. The solenoid valve is electrically connected to a bimetallic switch 44, and the heating strip is electrically connected to the bimetallic switch. A contact switch 45 is arranged on the workbench. The pressure strip at the bottom can act on the contact switch to close it. When the contact switch is closed, when the bimetallic strip of the bimetallic switch is in a cold state, the heating strip is connected to a power supply. After the bimetallic strip is deformed by heat, the solenoid valve is connected to the power supply, and at the same time, the heating strip is disconnected from the power supply.

[0025] The power supply is equipped with a starting switch 46 , and the starting switch, the bimetal switch 44 and the solenoid valve 43 are all arranged on the workbench 10 .

[0026] like Figure 3 The workbench 10 has a strip-shaped through hole 11 extending in the vertical direction, and the heating strip seat 41 is fitted in the strip-shaped through hole, with the top protruding upward from the workbench surface. The heating strip seat 41 has a strip-shaped groove, and the heating strip 40 is embedded in the strip-shaped groove.

[0027] like Figure 1The free end of the swing rod 20 is hinged with a drooping plate 21, and a bayonet 210 is provided at the bottom end of the drooping plate. The cross section of the pressure strip 30 is T-shaped, and the vertical wall of the pressure strip is clamped in the bayonet and fixed to the drooping plate by a locking screw.

[0028] Square positioning blocks 31 are provided at both ends of the pressure strip 30, and a buffer positioning assembly 50 is provided on the workbench 10. The buffer positioning assembly is located at both ends of the heating strip seat 41. The buffer positioning assembly includes a vertical guide rod 51 fixed on the workbench, a spring 52 and a lifting block 53 sleeved on the vertical guide rod, and the lifting block is located above the spring; a limit seat 54 is provided on the workbench, and a limit bolt 55 is screwed on the limit seat, and the limit bolt is located below the lifting block; the rocker arm 20 swings down, and the square positioning block 31 can be against the lifting block; the contact switch 45 is located below the lifting block.

[0029] Combination Figure 1 , Figure 3 The number of the rocker arms 20 is a pair, each rocker arm is connected to a cross bar 23 through a sub-cable 22, the cross bar is located below the workbench 10, the cross bar is connected to a total cable 24, the total cable is connected to a pedal 25, the pedal is hinged on a bracket 26, the bracket is connected to the workbench leg 12, and the pedal is equipped with a return spring 27.

[0030] The worker places the opening of the plastic bag with the wiring harness on the heating strip 40, closes the start switch 46, steps on the pedal 25, pulls the cable, and the cable drives the swing rod 20 to swing down, and the pressure strip 30 descends. The square positioning block 31 first contacts the lifting block 53, and the lifting block descends along the vertical guide rod 51 to compress the spring 52. The lifting block acts on the contact switch 45 to close it, and the pressure strip 30 presses the opening of the plastic bag against the heating strip 40. The spring 52 acts as a buffer for the pressure strip 30, so that the pressure strip can smoothly press the opening of the plastic bag. The limit bolt 55 limits the minimum height of the lifting block 53 to prevent the pressure strip 30 from over-pressing the opening of the plastic bag. The closing of the contact switch 45 connects the heating strip 40 to the power supply, and the heating strip heats up and closes the opening of the plastic bag. When the heating strip is heated, the bimetallic strip is deformed by the heat, the heating strip is disconnected from the power supply, the solenoid valve 43 is energized, the air source rushes high-pressure air into the vertical cylinder 42, the piston rod and the heating strip seat 41 descend, and the heating strip 40 is separated from the plastic bag opening to prevent the heating strip from overheating the plastic bag opening.

[0031] The worker releases the pedal 25, the swing rod 20 swings up and resets, the contact switch 45 is disconnected, the solenoid valve 43 loses power, the vertical cylinder 42 resets, the heating bar seat 41 rises and resets, and the bimetallic strip cools and resets.

[0032] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A sealing device for a wire harness packaging bag, comprising a swing rod (20) hinged on a workbench (10), a cable for driving the swing rod to swing, a pressure strip (30) installed at a free end of the swing rod, and a heating strip (40) installed on the workbench, characterized in that: The heating strip is installed in the heating strip seat (41), the heating strip seat is connected to the piston rod of the vertical cylinder (42), the vertical cylinder is installed at the bottom of the workbench, a solenoid valve (43) is arranged on the connection channel between the vertical cylinder and the air source, the solenoid valve is electrically connected to the bimetal switch (44), and the heating strip is electrically connected to the bimetal switch; A contact switch (45) is arranged on the workbench, and the pressure strip at the bottom can act on the contact switch to close it. When the contact switch is closed, when the bimetallic strip of the bimetallic strip switch is in a cold state, the heating strip is connected to the power supply. After the bimetallic strip is deformed by heat, the electromagnetic valve is connected to the power supply, and at the same time, the heating strip is disconnected from the power supply.

2. The sealing device for the wire harness packaging bag according to claim 1, characterized in that: The power supply is equipped with a start switch (46).

3. The sealing device for the wire harness packaging bag according to claim 1, characterized in that: The workbench (10) is provided with a strip-shaped through hole (11) in the up-and-down direction, and the heating strip seat (41) is fitted in the strip-shaped through hole, with the top thereof protruding upward from the workbench surface.

4. The sealing device for a wire harness packaging bag according to claim 1, characterized in that: The free end of the swing rod (20) is hinged with a drooping plate (21), the bottom end of the drooping plate is provided with a bayonet (210), the cross section of the pressure strip (30) is T-shaped, the vertical wall of the pressure strip is clamped in the bayonet and fixed to the drooping plate by a locking screw.

5. The sealing device for the wire harness packaging bag according to claim 1, characterized in that: Square positioning blocks (31) are provided at both ends of the pressure strip (30); a buffer positioning assembly (50) is provided on the workbench (10); the buffer positioning assembly is located at both ends of the heating strip seat (41); the buffer positioning assembly comprises a vertical guide rod (51) fixed on the workbench, a spring (52) sleeved on the vertical guide rod and a lifting block (53); the lifting block is located above the spring; a limit seat (54) is provided on the workbench; a limit bolt (55) is screwed on the limit seat; the limit bolt is located below the lifting block; the swing rod (20) swings down, and the square positioning block (31) can be against the lifting block; the contact switch (45) is located below the lifting block.

6. The sealing device for a wire harness packaging bag according to claim 1, characterized in that: The number of the swing rods (20) is a pair, each swing rod is connected to a cross bar (23) through a sub-cable (22), the cross bar is located below the workbench (10), the cross bar is connected to a main cable (24), the main cable is connected to a pedal (25), the pedal is hinged on a bracket (26), the bracket is connected to the workbench leg (12), and the pedal is equipped with a return spring (27).

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