JPH0215340B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a material centering device that pre-positions the material at a material take-out position on a material transport device such as a loader for loading and unloading material for turning processing or a robot. This invention relates to a centering device incorporating a mechanism for simultaneously checking materials.

Conventionally, when feeding materials to a machine tool using a conveyor, the materials are arranged on the conveyor in advance in the order of processing, but there are concerns about whether the materials are arranged in the correct order of processing or whether different types of materials are mixed up. The material diameter measuring device to check whether the materials were being placed was either not equipped or was an independent device.

The object of the present invention is to provide a centering device having a mechanism for checking the material at the same time as centering.

The centering device having a material check mechanism of the present invention, which has been made to achieve the above object, is a material conveying device that transports a round material that is gripped by a robot hand and supplied to a machine tool to a material take-out position. V-shaped claws facing each other across the round material at the material extraction position are provided in the material conveying device, and the opposing V-shaped claws are moved closer to each other to center the round material. A shaft having a drive mechanism and penetrating through the valley of the V-shaped claw is provided so as to protrude and be movable relative to the claw, and the amount of relative movement of the shaft from the protruding position with respect to the claw is measured. The gist is to provide a measuring means on the claw and to detect the diameter of the round material based on the relative movement amount measured when the claw is moved by the drive mechanism. .

The material check mechanism shown in FIGS. 1 and 2 is incorporated into a centering device.

A slidable shaft 2 protrudes from the center of the claw 1, and a rack 3 is cut into the shaft 2. A gear 4 is meshed with the rack 3, and the gear 4 is connected to a potentiometer 6 by a shaft 5 (FIGS. 1 and 2).

In order to lift the centering device and center it, press the claw 1.
is growing. At this time, the shaft 2 moves in the same way as the claw, but since the gear 4 is fixed to the main body 7, it rotates as the shaft 2 moves. When the claw 1 clamps the material and centering is completed, the tip of the shaft 2 hits the material and stops. The amount of movement of the shaft 2 thus far becomes the rotational force of the potentiometer 6 via the gear 4, and the material diameter is displayed. Here, if the material diameter is different from the material diameter in the processing order, an alarm is displayed and the operation is stopped (Figs. 1 to 4).

Claw 1 returns, releases the material, the centering device descends, and the robot grasps the material (Figure 5).

As explained above, by incorporating a material check mechanism into the conventional centering device, this invention can measure the material diameter at the same time as centering without providing an independent measuring device. If the diameter is different, an alarm is displayed and the operation is stopped, which has the effect of preventing damage to the tool and other parts due to machining the wrong workpiece.

As described above, according to the centering device having the material checking mechanism of the present invention, when the opposing pawls are brought close to each other by the drive mechanism, the shaft contacts the round material and is stopped, and then the V The diameter of the round material can be determined from the amount of relative movement until the shape claw comes into contact with the round material and centering is completed.

Therefore, you can center objects of any size, and by knowing the diameter, you can check the material to see if it is a foreign object.

In addition, by performing centering, the round material can be accurately positioned, and the diameter of the round material can be known in advance, so the opening of the robot hand when trying to grasp the round material can be minimized. It is possible to make fine adjustments. As a result, it is possible to eliminate the extra time required for opening, and extremely improve operational efficiency when transporting materials.

Furthermore, the mechanical operations required for centering and material diameter measurement are performed by a common drive mechanism,
Furthermore, both operations end simultaneously when the claw comes into contact with the round material. As a result, the equipment can be made compact and time-saving.

[Brief explanation of drawings]

The drawings show an embodiment of the centering device of the present invention. FIG. 1 is a plan view of the centering device with a material check mechanism attached, FIG. 2 is a three-dimensional view thereof, and FIGS. FIG. 5 is a drawing showing the operation of the centering and material checking mechanism. 1...Tlaw, 2...Shaft, 3...Rack,
4... Gear, 5... Shaft, 6... Potentiometer, 7... Main body, 8... Material.

Claims (1)

[Scope of Claims] 1. In a material conveying device that transports a round material that is gripped by a robot hand and supplied to a machine tool to a material take-out position, Vs are arranged opposite to each other across the round material at the material take-out position. A letter-shaped claw part is provided in the material conveying device, and a drive mechanism is provided for centering the round material by moving the opposing V-shaped claw parts closer to each other, and the valley of the V-shaped claw part is A penetrating shaft is provided so as to be movable relative to the claw, and a measuring means for measuring the amount of relative movement of the shaft from the protruding position with respect to the claw is provided on the claw, and the drive mechanism The centering device has a material check mechanism that detects the diameter of the round material based on the relative movement amount measured when the claw portion is moved.