Workpiece transport device
AssigneeKomatsu Industries Corporation
InventorHidetoshi AKASHI
Life of this patent
Estimating the term…
Abstract
A workpiece transport device capable of improving a workpiece transport speed to increase productivity is provided. The workpiece transport device transports a workpiece pressed by a press machine. The workpiece transport device includes a base portion, a crossbar that holds the workpiece, a parallel mechanism, and a motor. The parallel mechanism is supported on the base portion. The parallel mechanism is configured to change a position of the crossbar relative to the base portion by operating in a plane defined by a transport direction in which the workpiece is transported and an up-down direction. The motor generates a driving force for driving the parallel mechanism. The motor is mounted on the base portion.
Claims10
1:
- A workpiece transport device that transports a workpiece pressed by a press machine, the workpiece transport device comprising:
- a base portion;
- a holding portion that holds the workpiece;
- a parallel mechanism supported on the base portion and configured to change a position of the holding portion relative to the base portion by operating in a plane defined by a transport direction in which the workpiece is transported and an up-down direction;
- and
- an actuator that is mounted on the base portion and generates a driving force for driving the parallel mechanism.
2:
- The workpiece transport device according to claim 1, wherein
- the parallel mechanism includes a first arm portion and a second arm portion that are in parallel with each other, and
- the actuator exerts a driving force on the first arm portion for moving the first arm portion relative to the base portion, and exerts a driving force on the second arm portion for moving the second arm portion relative to the base portion independently of the first arm portion.
3:
- The workpiece transport device according to claim 2, wherein
- the first arm portion has a higher torsional rigidity than the second arm portion.
4:
- The workpiece transport device according to claim 1, wherein
- the base portion is configured to be movable in the transport direction.
5:
- The workpiece transport device according to claim 4, further comprising a guide rail extending in the transport direction and supporting the base portion, wherein
- the base portion moves in the transport direction along the guide rail.
6:
- The workpiece transport device according to claim 5, wherein
- the press machine has a die that moves in the up-down direction, a slide on which the die is mounted, a columnar portion extending in the up-down direction, and an attachment portion that attaches the slide to the columnar portion such that the slide is movable in the up-down direction, and
- the guide rail is disposed below the attachment portion.
7:
- The workpiece transport device according to claim 6, wherein
- the guide rail overlaps the slide when viewed in a direction orthogonal to the plane.
8:
- The workpiece transport device according to claim 2, further comprising one biasing member that is mounted on the base portion and biases both the first arm portion and the second arm portion upward.
9:
- The workpiece transport device according to claim 8, wherein
- the biasing member is a gas spring.
10:
- The workpiece transport device according to claim 9, wherein
- the gas spring has a cylinder, and a rod protruding from the cylinder and rotatably coupled to the base portion,
- the workpiece transport device further comprises a first coupling member having an unchanging length and coupled to the cylinder and the first arm portion, and a second coupling member having an unchanging length and coupled to the cylinder and the second arm portion, and
- the rod is biased in a direction in which it is pushed out of the cylinder.