JPS6221424Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a handling device that holds a fine ring-shaped object (hereinafter referred to as a workpiece) when the workpiece is transported, moved, or otherwise handled.

For example, during measurement inspection and assembly, it is necessary to take out the inner ring of a miniature bearing with an inner ring diameter of 1 to 2 mm one by one and transport it to a predetermined position. If the material is conveyed while being held between the diameters, it may pop out and fall when being held or during the conveyance, so it may be possible to hold it by suction in a vacuum. However, since the surface to be attracted is small, it has been difficult to maintain a constant posture and attract the object. A method has also been implemented in which a collector chuck is inserted into the inner circle to hold it, but this method has the disadvantage that the parts are fine and the strength is low, so it is easy to break and has a short lifespan, as well as being expensive.

This invention improves on this point and provides a device that uses a simple mechanism to handle objects reliably and without losing one's posture.

FIG. 1 shows this embodiment. In the figure, a cylinder 1 and a piston 2 are provided therein, and the left side of the figure, that is, the side opposite to the position where the workpiece is placed (hereinafter referred to as the backward side) A piston rod 3 is made to protrude outside the cylinder side wall, a spring 4 is attached to it, and the piston 2 is always pulled toward the backward side. A small diameter portion 5 for regulating the stopping position of the piston 2 is provided on the right side (referred to as the forward side) inside the cylinder 1, and a mounting portion 7 for the rod 6 is provided on the forward side of the piston. In the illustrated example, the rod 6 has a spiral groove, and for example, a drill can be used as is. The shape of the rod 6 will be described later.

An air introduction hole 8 is provided on the rearward side of the cylinder, and a switching valve for introducing and discharging pressurized air is connected thereto. An introduction hole 9 connected to a vacuum source is provided on the forward side of the cylinder 1, and a switching valve 10 is attached to the tip thereof. Now, when the piston 2 moves forward and hits the small diameter part 5, the rod 6 projects out of the cylinder and is inserted almost completely into the central hole of the workpiece 11.

In the above structure, the workpiece 11 is stopped at a predetermined position, and the cylinder 1 is moved toward it by appropriate means, and pressurized air is sent in through the introduction hole 8, and at the same time, the introduction hole 9 is turned into a vacuum source. They communicate to reduce the pressure between the chambers on the forward side. As a result, the piston 2 moves forward and stops when it hits the small diameter portion 5, and the rod 6 moves forward, and the vacuum source sucks outside air through the groove of the rod 6. As the rod 6 enters the central hole of the workpiece 11, the workpiece is stably held by the suction of air through the groove. Then, in this state, if the cylinder 1 is moved to a predetermined position and the valve of the introduction hole 8 is opened to release pressurized air, the piston 2 will move back by the force of the spring 4, and the workpiece 11 will be removed from the rod. 6
automatically leave. In this case, to remove the workpiece from the rod, the rod can be pulled out as described above, or it can be pinched off from the outside.

As shown above, since there is no mechanism to specifically chuck the workpiece, it is easy to attach and detach the workpiece, and if vacuum suction is continued until the transfer of the workpiece is completed, the workpiece will not lose its posture and will scatter. No accidents will occur.

An example of the rod 6 is shown in FIG. 2, in which "a" has the above-mentioned spiral groove, "b" has a small hole in the center,
A suction hole is provided at right angles to the rod 6, and a plurality of grooves (c) are provided in the axial direction on the outer peripheral surface of the rod 6, through which air is sucked in to hold the workpiece.

d is a rod with a triangular cross section and has a similar effect. In addition, the cross-section of the rod or the shape of the groove on the outer circumferential surface may be such that there is some gap between it and the inner circle of the workpiece so that suction air can flow through this gap. The shape can be taken freely. Furthermore, if the rod is made of a breathable material such as sintered metal, it can be used without requiring any special processing such as a cross section or groove shape.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the device of the present invention, and FIG. 2 is an explanatory view showing another embodiment of the rod. 1...Cylinder, 2...Piston, 6...Rod, 8, 9...Introduction hole, 10...Switching valve, 11...
…work piece.

Claims (1)

[Scope of utility model registration request] Providing a rod that can move forward and backward relative to the cylinder, can be inserted into a hole in a workpiece, and has a gap between it and the inside of the hole through which air can flow;
This small parts handling device connects the gap to an air intake source capable of suctioning and holding a workpiece by applying negative air pressure in the gap between the rods, and allows the workpiece to be detached by retracting the rod from the cylinder.