JPH07214431A - Work holding device - Google Patents

Abstract

PURPOSE:To realize insertion even when a work is inclined in regard to a rodlike member. CONSTITUTION:When pushing up force from a downward direction is imposed on a holding member 1, the holding member 1 moves a guide plate 17 upward against the energizing force of springs 18, and the taper surface 23a of the bulging-out member 23 of a positioning rod 22 is separated from the taper surface 24a of the rod retaining member 24 of a positioning plate 16. Then, the holding member 1 can be moved horizontally along the positioning plate 16 by means of free bearings 20 butting against the upper surface of the holding member 1, and at the same time comes to be able to be swung by the inclination of the taper surface 23a of the bulging-out member 23 of the positioning rod 22 in regard to the taper surface 24a of the rod retaining member 24 of the positioning plate 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work holding device used for inserting an inner peripheral hole of a work such as a gear held by a holding member into a rod-shaped member.

[0002]

2. Description of the Related Art As a method of manufacturing a gear for a vehicle, there is known a method of sintering a compacted compact to obtain a product. Forming equipment, sintering furnace, quenching and tempering equipment, and various inspection equipment. Then, in such a gear manufacturing apparatus, there is a case where the work, which has undergone a predetermined process, is inserted into the rod-shaped member and stocked.

Conventionally, as a work holding device used for inserting such a work into a rod-shaped member, a clamp member 101 for holding a work W is horizontally oriented with respect to a main body 102 as a reference, as shown in FIG. When the work W is inserted from above the rod-shaped member 103 after the work W is movably held and the work W is gripped by the clamp member 101,
It is known that the clamp member 101 is adjusted in position while moving in the horizontal direction.

[0004]

In the above-mentioned conventional work gripping device, since the clamp member only moves in the horizontal direction with respect to the main body, the axial center of the work gripped by the clamp member and the rod shape. If the shaft center of the member is not at least parallel, the work interferes with the rod-shaped member during insertion and cannot be inserted. Therefore, the clamp member must be positioned so that it can move in the direction perpendicular to the axial direction of the rod-shaped member, and the workpiece is also clamped so that its axial center is parallel to the axial direction of the rod-shaped member. Therefore, high positioning accuracy is required.

[0005]

In order to solve the above-mentioned problems, the present invention grasps the structure of the floating mechanism when connecting the grasping member for clamping the work to the vertical drive unit via the floating mechanism. The member is held so as to be swingable in an arbitrary direction and is returned to the original position.

[0006]

Since the gripping member is held by the floating mechanism so as to be swingable in any direction, even if the work is tilted with respect to the axis of the rod-shaped member, the gripping member swings to move the work into the rod. It can be inserted into a strip-shaped member.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a partial cross-sectional front view of a work gripping device according to the present invention, FIG. 2 is an explanatory view for explaining the operation of the same, and FIG. 3 is a partial cross-sectional front view of another embodiment of the present invention. .

The work gripping device is composed of a gripping member 1 for gripping a work W connected to a drive unit 3 via a floating mechanism 2. The gripping member 1 has rods 5 and 6 which are built in the housing case 4 and expand and contract by a cylinder so as to project from both sides of the housing case 4, and these rods 5 and 6 are extended.
The chucks 7 and 7 for holding the work W from both sides are attached to the tip of the rod, and the rod 8 and the guide rods 9 and 9 are vertically provided on the lower surface of the housing case 4, and the pressing members are attached to these rods 8 and 9. 10 is fitted so that it can move up and down,
A spring 11 externally fitted to the guide rod 9 is provided between the upper surface of the pressing member 10 and the lower surface of the housing case 4 to urge the pressing member 10 downward.

The floating mechanism section 2 connects a frame 15 to a drive section 3 for moving the entire apparatus in the vertical direction, and a positioning plate 16 is attached to the lower end surface of the frame 15.
The guide plate 17 is disposed between the positioning plate 16 and the upper surface of the housing case 4 of the grip member 1, and the guide rod 18 standing on the guide plate 17 is inserted into the positioning plate 16 to guide the guide rod 1.
8, a spring 19 is externally fitted to urge the guide plate 17 toward the gripping member 1 so that the guide plate 17 can move up and down. Further, the guide plate 17 is in contact with the upper surface of the housing case 4 of the gripping member 1. Holds 20.

Further, a positioning rod 22 penetrating the through hole 17a formed in the guide plate 17 and the through hole 16a formed in the positioning plate 16 is erected on the upper surface of the housing case 4 of the gripping member 1.
A bulging member 23 having a male taper surface 23a extending upward is attached to the upper end of the rod 2, and a rod holding member 24 having a female taper surface 24a for holding the bulging member 23 of the positioning rod 22 is formed on the positioning plate 16. Is provided.
A stopper member 25 is attached to the positioning rod 22.

In the work gripping device configured as described above, the gripping member 1 is pushed down by the guide plate 17 urged downwards via the free bearing 20, and the tapered surface of the bulging member 23 of the positioning rod 22. Two
Since 3a is held in a state of being engaged with the taper surface 24a of the rod holding member 24 of the positioning plate 16, when a pushing-up force from below is applied to the gripping member 1,
The gripping member 1 moves the guide plate 17 upward against the biasing force of the spring 18, and the tapered surface 23a of the bulging member 23 of the positioning rod 22 separates from the tapered surface 24a of the rod holding member 24 of the positioning plate 16. .

As a result, the holding member 1 is positioned by the free bearing 20 abutting on the upper surface of the positioning plate 1.
6 so that the tapered surface 23a of the bulging member 23 of the positioning rod 22 can be swung by tilting with respect to the tapered surface 24a of the rod holding member 24 of the positioning plate 16. Become.

Therefore, as shown in FIG. 2, the holding member 1
When the work W is gripped and inserted into the rod-shaped member R from above, if the axis of the work W is tilted with respect to the axis of the rod-shaped member R as shown in FIG. When the work W is lowered by activating 3, the work W and the rod-shaped member R locally interfere with each other as shown in FIG.
Since the pushing force in the oblique direction acts on the gripping member 1 with respect to the axis of the work W, the bulging member 2 of the positioning rod 22 is applied.
The tapered surface 23a of No. 3 floats away from the tapered surface 24a of the rod holding member 24 of the positioning plate 16, and the moment force generated by the tilt causes the gripping member 1 to swing and move in the horizontal direction, so that the free bearing 20 and the housing case. 4 Since there is a gap between the upper surface and the upper surface, the shaft center of the work W coincides with the shaft center of the rod-shaped member R as shown in FIG. The work W is inserted into the rod-shaped member R as shown in (d).

Next, the floating mechanism portion 30 of the work gripping device of another embodiment shown in FIG. 3 uses a cam floor for horizontal floating and a spherical surface for swing floating, and uses a guide plate for the positioning rod 22. The holding members 33 and 34 for holding the holding members 31 and 32 for holding 16 from above and below by spherical coupling are attached, and the holding member 3
Cam floor 3 that abuts guide plate 16 on 1, 32
5 and 36 are attached.

Therefore, since the tapered surface 23a of the bulging member 23 of the positioning rod 22 can be separated from the tapered surface 24a of the rod holding member 24 of the positioning plate 16, the gripping member 1 is moved by the cam floor 36 of the holding members 33 and 34. It can be moved horizontally along the positioning plate 16 and can be rocked by rotating the holding members 35 and 36 that are spherically coupled to the holding members 33 and 34. In the above embodiment, the example in which a work such as a gear is inserted into the rod-shaped member has been described, but the floating mechanism of the work gripping device of the present invention is
This is also effective when the gripping member is swung when gripping the work, and the gripping portion is aligned with the surface to be gripped of the work to securely grip the work.

[0016]

As described above, according to the present invention,
Since the gripping member is held horizontally movable and swingable by the floating mechanism, even if the work is tilted with respect to the axis of the rod-shaped member, the gripping member horizontally moves and swings to move the work. The shaft center can be aligned with the shaft center of the rod-shaped member, and the work can be inserted.

[Brief description of drawings]

FIG. 1 is a partial sectional front view of a work gripping device according to the present invention.

FIG. 2 is an explanatory diagram for explaining the operation of the device.

FIG. 3 is a partial sectional front view of another embodiment of the present invention.

FIG. 4 is a front view of a conventional work gripping device.

[Explanation of symbols]

1 ... Gripping member, 2, 30 ... Floating mechanism part, 3 ...
Drive part, 7 ... Clamp member, 16 ... Positioning plate (positioning member), 17 ... Guide plate (guide member), 22 ... Positioning rod, 23 ... Bulging member, 24 ...
Rod holding member, 31, 32 ... Clamping member, 33, 34 ...
Holding member, 35, 36 ... Cam floor.

Claims (3)

[Claims] 1. A work gripping device having a gripping member for gripping a work and a floating mechanism for floatingly supporting the gripping member, wherein the gripping member is connected to a drive unit via a floating mechanism, and the floating mechanism is a gripping member. And a work gripping device that biases the gripping member so as to return to the original position. 2. The work gripping device according to claim 1, wherein the floating mechanism holds a free bearing that abuts an upper surface of the gripping member between a positioning member connected to the drive unit and the gripping member. Is arranged so as to be movable up and down by urging it toward the gripping member, and a positioning rod penetrating the guide member and the positioning member is erected on the upper surface of the gripping member, and the upper end of the positioning rod is tapered. A work gripping device provided with a bulging portion, and a taper-shaped rod holding portion for holding the bulging portion of the positioning rod on the positioning member. 3. The work gripping apparatus according to claim 1, wherein the floating mechanism is capable of moving up and down by urging a guide member between the positioning member connected to the drive unit and the gripping member toward the gripping member. A holding member that is disposed and has a positioning rod that extends through the guide member and the positioning member on the upper surface of the gripping member, and that holds the holding member that holds the guide member from above and below by spherical coupling. And a tapered rod holding portion for holding the protruding portion of the positioning rod on the positioning member.