Welding wire feeding device

Abstract

The present invention provides a welding wire feeding device that reduces the man-hours required for tasks such as assembly, cleaning, parts replacement, and reassembly of the pressurizing mechanism of the welding wire feeding device. [Solution] The pressurizing mechanism P1 of this welding wire feeding device 1 has a pressurizing arm 300, one end of which is rotatably mounted relative to the bottom surface 111, and the other end of which is equipped with a locking pin 200 that can engage with one end of the locking pin 200. The locking pin 200 has an adjustment screw 210 on one end that engages with the pressurizing arm 300, and a spring case 220 on the other end that holds the adjustment screw 210 and is rotatably mounted along the first wall 112. By engaging the locking pin 200 with the pressurizing arm 300 in a state substantially parallel to the bottom surface 111, a pressurized state is selected, and by rotatable the locking pin 200 in a direction away from the bottom surface 111 along the first wall 112, a non-pressurized state is selected.

Claims

1. A welding wire feeding device that feeds welding wire to the area to be welded, The main body portion is provided through which the welding wire can be inserted, The system includes a welding wire feeding mechanism that contacts the welding wire and feeds the welding wire to the welding location, The main body includes a housing area for housing the welding wire feeding mechanism, The containment area includes a bottom surface and a first wall located upstream in the direction in which the welding wire is fed, and a second wall located downstream in the direction in which the welding wire is fed, which are arranged at a predetermined distance from the bottom surface in the direction in which the welding wire is fed. The welding wire feeding mechanism is placed on the bottom surface, The welding wire feeding mechanism includes a drive roller that contacts the welding wire and a pressure roller that, together with the drive roller, grips the welding wire. The pressure roller is held by a pressure mechanism for pressurizing the pressure roller against the drive roller. The pressurizing mechanism is provided so that it can select between a pressurized state in which the pressurizing roller is pressed against the drive roller and a non-pressurized state in which the pressurizing roller is separated from the drive roller. The pressurizing mechanism includes a pressurizing arm for holding the pressurizing roller, and a locking pin for selecting between the pressurized state and the unpressurized state. The pressurizing arm is provided with one end rotatably attached to the bottom surface, and the other end is provided so as to be able to engage with one end of the locking pin. The locking pin has, on one end, a pressure lever that engages with the pressure arm, and on the other end, a spring case that holds the pressure lever and is rotatably mounted along the first wall. By engaging the locking pin with the pressure arm in a position substantially parallel to the bottom surface, the pressure state is selected. The non-pressurized state is selected by making the locking pin rotatable along the first wall in a direction away from the bottom surface. Welding wire feeding device.

2. The spring case has a cylindrical through hole that accommodates the other end of the pressurizing lever. The spring case is rotatably fixed to the first wall by a rotating shaft bolt that serves as a pivot for allowing rotation along the first wall. The welding wire feeding device according to claim 1.

3. The spring case has a bolt and nut housed inside the cylindrical through hole, and a coil spring that biases the bolt and nut toward the other end. The pressure lever has an engagement head at one end that engages with the pressure arm, and a male thread at the other end that passes through the coil spring and screws onto the bolt and nut. When the aforementioned pressurized state is selected, the pressure applied to the drive roller by the pressure roller is adjusted by rotating the engaging head around its axis or in the reverse direction to adjust the compression state of the coil spring of the bolt and nut. The welding wire feeding device according to claim 2.

4. The aforementioned spring case is The cylindrical through-hole has a slit that extends along its axial direction and is open to the outside, The pressurizing lever can be housed in the cylindrical through-hole through the slit. The welding wire feeding device according to claim 2.

5. The locking pin is provided in such a way that it can be selected to tilt toward the bottom surface when the pressurizing mechanism is in the non-pressurized state. The aforementioned drive roller is attached to the motor's rotating shaft, The spring case includes a rotation prevention mechanism that, when the lock pin is in the inclined state, restricts the rotation of the motor shaft when attaching or removing the drive roller from the motor shaft. The welding wire feeding device according to claim 1.

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