JPS6128707Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field The present invention relates to a gripping device that is incorporated into a part of a transfer device, a fixing device, etc., and is used to grip parts or workpieces.

(B) Background Art Conventionally, in this type of gripping mechanism, when a certain part is held between two rotating claws, if both claws do not move in the same (more accurately, symmetrical) manner, the part will be damaged. The part cannot be gripped at the center, and in some cases, it may become impossible to hold the part or the part may be damaged.

Therefore, there have been various mechanisms for accurately gripping at the center, but all of them have complicated structures and mechanisms.

(c) Disclosure of the invention In view of the above-mentioned drawbacks of the conventional technology, the present invention has a structure in which two rotating pawls are accurately and evenly moved by the operation of one cylinder to ensure that the object to be held can be gripped at the center. It provides a simple gripping device,
That is, gears of the same shape that mesh with each other are inserted and supported in a space in the middle of the front end of a support metal body whose side surface is approximately U-shaped and has a built-in cylinder at the rear, and one side of the tooth surface of the gears is cut off. A base of a clamping claw is fixed to each of the cut surfaces, and a concave surface is formed on the opposite side of the cut surface to fit with a pressing metal fitting attached to the tip of the piston rod of the cylinder. be. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a support metal body having a substantially U-shaped side surface with a cavity 2 formed in the middle of its front end, and a pneumatic or hydraulic support body equipped with a piston rod 3 reciprocating toward the cavity 2 at the rear inside the body 1. A cylinder 4 is built in, and a short cylindrical or spherical pressing metal fitting 5 is fixed to the tip of the rod 3.

Reference numeral 6 denotes two thick-walled gears of the same shape, which are respectively pivotally supported by two pins 15 inserted and fixed to the left and right sides of the space 2, and are meshed with each other and can freely rotate in the horizontal direction. As shown in FIG. 1, 6 has one side of the gear cut away, and the bases of clamping claws 7 are fixed to the cut surfaces 9 with screws 8, respectively. Also,
On the opposite side of the cut surface 9, there is an arcuate concave surface 10 having a diameter slightly larger than that of the pressing hardware 5, which is oriented somewhat toward the cylinder 4 side (that is, diagonally backward) of the main body 1 when held by the claws 7. It is formed by cutting and is adapted to fit with the press metal fitting 5. Reference numeral 11 denotes a relief groove integrally connected to the rear side of the concave surface 10, for allowing the rod 3 of the press hardware 5 to escape into the gear 6 when the press metal component 5 moves forward while fitting into the concave surface 10. belongs to.

When oil or air is fed into the hydraulic or pneumatic cylinder 4 from the inlet 12, both gears 6
The pressing hardware 5 at the tip of the piston rod 3, which is fitted into the concave surface 10, moves forward and presses the front side of the concave surface 10, and by rotating both gears 6 that are meshing with each other, both clamping claws 7 are moved together. Turn in the direction of expansion. When the object 13 to be clamped reaches a predetermined position in front of the hardware main body 1 by an arbitrary transfer device at the forward end of the pressing hardware 5 (therefore, both claws 7 are in the maximum expanded state), the object 13 is inserted into the cylinder 4 through the inlet port. Oil or air is injected from 14 and the rod 3 moves backward. As a result, the pressing hardware 5 is now pressed against the concave surface 1 of both gears 6.
By pressing the rear side of the gripper 0, both claws 7 which have expanded are turned in opposite directions to close them, thereby reliably gripping the object 13. Therefore, according to this device, both the clamping claws 7 are engaged with each other by the gear 6 in the rotation device, so that they perform an even rotational movement, so that the object 14 to be clamped can be reliably caught at the center. Become.

In addition, in FIGS. 1 and 2, since the concave surfaces 10 of both gears 6 are formed in an arc shape parallel to the axis, the meshing will be temporarily disengaged at a position where both the concave surfaces 10 face each other in front. Therefore, by changing the concave surface 10 into an arc shape, a part of the tooth surface of the thick gear 6 is formed into a hemispherical surface as shown in FIG. 3, and the spherical pressing metal fitting 5 is fitted into this. Then, both gears 6 will always mesh with each other, and even rotation of both clamping claws 7 will be further ensured.

Needless to say, the shape of the clamping claws 7 is molded to match the shape of the object 13 to be clamped, and the claws 7 are replaced as needed depending on the size and shape of the object 13 to be clamped.

(d) Effects of the invention The present invention is constructed as described above, and the gears that mesh with each other, which are attached to the pivot bases of the two pivot clamp claws, are rotated by the operation of one cylinder. Since both jaws perform an even rotational movement, it is possible to always catch the object held in the center reliably, and it has the advantages of a simple structure and easy manufacture, and can be incorporated into transfer devices and fixing devices. It's easy.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the gripping device according to the present invention, FIG. 2 is a cross-sectional view of the assembled state, and FIG. 3 is a perspective view showing another example of the gripping claw and gear portion. 1... Support hardware body, 2... Hollow space, 3... Piston rod, 4... Cylinder, 5... Pressing hardware,
6... Gear, 7... Clamping claw, 8... Screw, 9...
Resection surface, 10...Concave surface, 11...Escape groove, 12
... Inlet port, 13... Object to be held, 14... Inlet port, 15... Pin.

Claims (1)

[Scope of utility model registration request] Gears of the same shape that mesh with each other are inserted and supported in a space in the middle of the front end of the supporting metal body, which has a substantially U-shaped side surface and has a built-in cylinder at the rear. The base of a clamping claw is fixed to each cut surface, and the opposite side of the gear to the cut surface has a pressing metal piece formed in either a short cylindrical or spherical shape attached to the tip of the piston rod of the cylinder. A gripping device characterized in that a fitting concave surface is formed, and a relief groove for the piston rod when the pressing metal piece moves forward is connected to the concave surface.