JPH0627310Y2 - Work gripping mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a work gripping mechanism used in an apparatus for inserting and passing a gripped work into a supply hole.

(Prior Art) Conventionally, in a device such as a work transfer / reception device for a relatively lightweight and small work, the work is gripped and handled. As such a gripping mechanism, a pair of openable and closable works is used. A mechanism in which the work is sandwiched by the gripping members from both sides is general.

(Problems to be solved by the invention) However, in the case where the conventional gripping mechanism only presses and grips from the left and right directions, if the delivery part that delivers the gripped work is a supply hole that matches the outer shape of the work, The surface of the work may be damaged when the work is forcibly fitted and inserted. That is, if the work and the supply hole are not properly aligned, the insertion pressure will be excessive when the work is inserted into the supply hole.
At this time, there is a problem that the gripping part gripping the work slides on the surface of the work and scratches the surface.

(Means for Solving the Problem) In order to solve the above problem, the present invention provides a pair of openable and closable supports that sandwich a work and are provided with gripping claws, and drives the work gripped by the gripping claws for supply. In a gripping mechanism for a work which is inserted into a supply hole and supplied by an apparatus, a pair of protrusions is formed at a base end portion of a support body, and a long slot is formed on each protrusion along the opening and closing direction. ,
By forming a pair of rotary shafts that are inserted into each elongated hole at the base end portion of the grip claws, and inserting and engaging the rotating shafts into the elongated holes,
The grip claws are allowed to move freely in the opening / closing direction with respect to the support body, and the tip of the grip claws can be swung in the direction opposite to the work insertion direction.

Further, the supporting body is provided with a biasing member that biases the grip claw in the closing direction and a biasing member that biases the grip claw in the insertion direction of the work.

(Operation) When the work is fitted and inserted into the supply hole where the position alignment is not sufficient, the work is grasped by the urging force for urging in the closing direction and can be floated, so that the work easily moves and the position is Be consistent. Further, when the work insertion pressure increases, the tip of the gripping claw swings in the direction opposite to the insertion direction and the force can be released.

(Embodiment) An embodiment of the work gripping mechanism of the present invention will be described with reference to the accompanying drawings.

1 to 3 show the present holding mechanism, FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is an exploded perspective view of a holding portion.

This work gripping mechanism is applied to a delivery / delivery device that grips a shaft-shaped material before processing and supplies it to a jig for machining, and as shown in FIG. 1, a supply hole provided in the jig 1. It is used to insert and insert the shaft-shaped material 2 into the material holding hole 1a from above. A large number of the jigs 1 are arranged at a predetermined interval on a conveyance orbit that is transported in a pitch manner, and new jigs are sequentially fed. Considering the positional error of the jigs during the transportation, The jig holding hole 1a has a tapered upper portion so that the material 2 can be easily received.

As shown in FIG. 4, the pair of gripping members 3 each include a pair of support bodies 4 and gripping claws 5 supported by the support bodies 4, and a base portion of the support body 4 has a gripping portion opening / closing mechanism (not shown). The driving device is connected to the driving device for driving the gripping member 3 up and down in order to supply and deliver the gripped material to the material holding hole 1a.

A projecting part 4a projecting upward for sandwiching the grip claw 5 is formed in a pair at the tip of the support body 4, and a long hole 4b elongated in the opening / closing direction is provided on this side surface. Further, a through hole 4c for inserting a pin body 6 described later is provided on the back surface of the protruding portion 4a toward the inside of the elongated hole 4b, and a bracket 4d having a screw hole is provided on the support body 4 below the protruding portion 4a. Are formed.

The cross-section L extends from the upper surface to the rear surface of each of the protrusions 4a.
The leaf spring body 7 having a shape is attached to the upper surface of the projecting portion with a screw 8 and has a cutout portion 7a on the back surface, and a spring portion 7b is formed below the cutout portion 7a. Further, the position of the spring portion 7b is positioned so as to be coded at the position of the through hole 4c penetrating toward the elongated hole 4b.

As shown in FIG. 4, the gripping claw 5 is formed to have an L-shaped cross section, and is provided with a recessed portion for gripping a shaft-shaped material at its tip end, and is provided at the other end side with the above-mentioned protruding portion long hole 4b. The mating rotary shaft 5a is formed by projecting from both side surfaces.
The gripping claw 5 is allowed to move freely in the opening / closing direction by passing through the elongated hole 4b, and the tip of the gripping claw 5 swings upward around the rotary shaft 5a.

Further, at the time of assembly, the pin body 6 is arranged in the projecting portion through hole 4c at the back of the rotary shaft 5a inserted into the elongated hole 4b, and the leaf spring body 7 is attached so that the pin body 6 is pressed by the spring portion 7b. As a result, the entire grip claw 5 is biased forward, that is, in the closing direction.

On the other hand, a U-shaped linear spring 9 is attached to the bracket 4d on the rear surface of the support body 4 with a screw 10, and both protrusions 4a
Is arranged so as to surround the periphery of the gripping claw 5 and press the upper surface of the gripping claw 5 from above, and biases the gripping claw 5 downward.

Further, the gripping members 3 composed of the support 4 and the gripping claws 5 are formed in the same body on the left and right sides, respectively, and form a pair.

In the gripping mechanism configured as described above, the material 2 is gripped by the gripping claws 5 by the biasing pressure of the spring portion 7b of the leaf spring body 7, and both gripping claws 5 are movably supported. During fitting and insertion into the holding hole 1a, the material 2 and the material holding hole 1a can be easily aligned even if they are slightly displaced. Further, since the tip of the gripping claw can be swung upward, for example, as shown in FIG. 5, even when the gripping member 3 for lowering and inserting the material 2 does not smoothly descend downward, Escapes upward and does not damage the surface of the material.

Further, because of such a configuration, there is also an effect that it is not necessary to replace the component parts of the grip portion even when the shaft diameter of the material to be handled changes.

(Effects of the Invention) As described above, since the present invention is configured to grasp the work by the movable grasping claw that is biased in the predetermined direction, it is said that the work surface is damaged because the work is grasped by the restraint in the past. I was able to solve the problem. It also has a secondary effect that the materials that can be handled are diversified.

[Brief description of drawings]

1 to 3 show the present gripping mechanism. FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. 4 is an exploded perspective view of a gripping part. Is an action diagram. In the figure, 1 is a jig, 1a is a material holding hole, 2 is a material, 3 is a gripping member, 4 is a support, 5 is a gripping claw, 7 is a leaf spring, and 9 is a linear spring.

Claims (1)

[Scope of utility model registration request] 1. A pair of gripping claws are provided on a pair of openable and closable supports facing each other with the work sandwiched therebetween, and the work gripped by the gripping claws is inserted into a supply hole by a supply drive device and supplied. In the gripping mechanism, a pair of protrusions are formed at the base end of the support to form long slots in each protrusion along the opening and closing direction, while at the base end of the gripper, each slot is formed. By forming a pair of rotating shafts to be inserted, and inserting and engaging the rotating shafts in the elongated holes, the gripping claws can move freely in the opening / closing direction with respect to the support and the tip of the gripping claws inserts the work. An urging member for urging the grip claw in the closing direction,
A work gripping mechanism comprising an urging member for urging the gripping claws in the work insertion direction.