JPH05277980A - Chucking device - Google Patents

Abstract

PURPOSE:To perform simple and reliable holding and conveyance of an object having a low strength without damaging it, by mounting a converting mechanism on an arm body so that other two holding parts are rotated in a direction, in which the two holding parts approach one holding part, along with linear movement of one holding part. CONSTITUTION:When an expandable arm 8 is expanded by means of a cylinder 7, a first holding part 2 is brought into contact with an object 17. In this case, the taper part 5 of the first holding part 2 is horizontally moved to an arm body 1 and thereby, slide jigs 12 and 13 are about to move along the taper part 5. Second and third holding parts 3 and 4 are rotated around fulcrums 14 and 15, respectively, in a manner to approach the first holding part 2 and brought into contact with the object 17. As a result, the object 17 is supported at three points, i.e., the first, second, and third holding parts 2, 3, and 4. In this way, the object 17 is held and conveyed to a given position. Meanwhile, in order to release the object 17 from holding, the expandable arm 8 is contracted by means of the cylinder 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device capable of easily holding an object having extremely low strength such as a press-molded body without damaging it.

[0002]

2. Description of the Related Art Conventionally, in the field of powder metallurgy and the like, a predetermined metal powder is molded by a mechanical press or a hydrostatic press, and if necessary, presintering and intermediate processing are performed. After that, the product is manufactured by sintering and finishing.

In a series of steps from the molding of such metal powder to the finishing of products, an automatic device has already been introduced in each of the press molding step, pre-sintering step, sintering step, intermediate working step, and finishing step. Has been tried and automation is attempted. However, when the molded product molded in the press molding process is taken out of the mold and conveyed to the next process, the strength of the molded product is extremely low.Therefore, when automating the transportation of this molded product, soften the molded product. A robot or the like to grasp was especially necessary.

However, since such a robot has a complicated mechanism, is expensive, and is not common, even in this process, an operator can successively grasp the molded body by hand and carry it to a predetermined place. Has been done. But,
In this case, since it takes a lot of time and unattended operation is not possible, a device capable of easily grasping the molded body has been demanded.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an apparatus capable of easily holding and transporting an object having extremely low strength such as a press-molded article without damaging it. ..

[0006]

According to another aspect of the present invention, there is provided a chucking device including: a first holding part formed on an arm body and movable in a horizontal direction; and a first holding part provided outside the first holding part. A chucking device for holding an object by three points, that is, a second holding part and a third holding part, wherein the second holding part and the third holding part are provided along with the horizontal linear movement of the first holding part.
A means for solving the problem is provided with a conversion mechanism in the arm main body so that the holding portion makes a rotational movement in a direction approaching the first holding portion.

According to another aspect of the chucking device of the present invention, the arm body has a first arm connected to the expansion / contraction means and a first arm.
The second arm connected to the holding part is provided, and the elastic member is provided between the first arm and the second arm, which is a means for solving the problem.

[0008]

According to the structure of the chucking device of the first aspect, the first holding part moves from the horizontal direction to contact the object to be chucked and the first holding part moves. With the horizontal linear movement of the parts, the conversion mechanism causes the downward rotation of the second holding part and the upward rotation of the third holding part so that the respective holding parts come into contact with the object, and a total of three points are applied to the object. Is supported.

After the device is transported to a predetermined place, when the first holding part moves in the opposite direction to the above, the first holding part separates from the object and the conversion mechanism is accompanied by the horizontal linear movement of the arm body. As a result, an upward rotational movement of the second holding portion and a downward rotational movement of the third holding portion occur, and the respective holding portions are separated from the object, and the support is released.

According to the structure of the chucking device according to the second aspect, the elastic member can reduce the impact force when the first holding portion comes into contact with the object due to the extension of the first arm.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The chucking device of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view of an embodiment of a chucking device of the present invention, which is partially sectionally viewed.

In this figure, the portion indicated by reference numeral 1 is the arm body. In this arm body 1,
An extension / contraction arm 8 having a pressure transmission plate 9 at its tip end is provided which is extendable / contractible by a cylinder 7 arranged at the end thereof. A through hole 16 is formed in a part of the pressure transmitting plate 9, and a pressure receiving plate 11 is connected to a pressure transmitting rod 10 penetrating the through hole 16.

Further, the pressure receiving plate 11 is provided with a first holding portion 2 having a tapered portion 5 formed therein. A spring 6 is provided along the pressure transmission rod 10 between the pressure transmission plate 9 and the pressure receiving plate 11.

Further, a fulcrum 14 and a fulcrum 1 fixed to the arm body 1 are provided above and below the first holding portion 2 in the figure.
A second holding portion 3 and a third holding portion 4 which are rotatable around 5 as an axis.
Are formed. Slide jigs 12 and 13 are provided on the sides of the second holding portion 3 and the third holding portion 4 which are in contact with the taper portion 5, respectively. This slide 12, 13
Moves as the taper portion 5 of the first holding portion expands and contracts in the horizontal direction with respect to the arm body 1, and as a result, the second holding portion 3 and the third holding portion 4 are fulcrums 14, 15 respectively.
It can rotate around the axis.

The arm body 1 can be moved by being connected to a moving device (not shown).

In order to hold a cylindrical object using the chucking device constructed as described above, the telescopic arm 8 is extended by the cylinder 7 in the object direction, and the first holding portion 2 is held.
To contact the object 17. At this time, the taper portion 5 of the first holding portion 2 moves in the horizontal direction with respect to the arm body 1, so that the slide jigs 12 and 13 tend to move along the taper portion 5. Therefore, the second holding unit 3 and the third holding unit 4 rotate about the fulcrums 14 and 15 so as to approach the first holding unit and come into contact with the object 17, so that the object 17 is held by the first holding unit 2. The second holding portion 3 and the third holding portion 4 are supported at three points.

After holding the object 17 in this way and carrying it to a predetermined position, in order to release the support of the object 17, the telescopic arm 8 is contracted by the cylinder 7 contrary to the above method. Then, the taper part 5 of the first holding part 2 moves in the horizontal direction opposite to the above with respect to the arm body 1, so that the second holding part 3 and the third holding part 4 have fulcrums 14, 15 respectively. As the shaft rotates away from the first holding unit 2, the support of the object 17 is released.

As described above, in the chucking device of this embodiment, the object can be easily supported and released by expanding and contracting the expandable arm 8. Therefore, it is possible to easily attach / detach an object having a very small strength such as a molded body without requiring a complicated mechanism.

Therefore, according to this chucking device, the process of taking out the molded product molded in the press molding process from the mold and carrying it to the next process can be easily automated by being connected to the moving device or the like. ..

Further, since the spring 6 is provided between the pressure transmission plate 9 and the pressure receiving plate 11, the expansion / contraction arm 8 can be extended to reduce the pressure at the time of contact with the object 17. it can. Therefore, the object 17 having low strength can be softly contacted with the object 17 without damaging the object 17.

The holding force can be changed by replacing the spring with a spring having a different spring constant.

In this embodiment, the taper portion 5 is provided as the conversion mechanism, but the present invention is not limited to this, and a linear motion such as a rack and pinion may be converted into a rotary motion.

[0023]

As described above, in the chucking device according to the first aspect, the first holding portion formed on the arm body and movable in the horizontal direction, and the first holding portion are respectively provided outside the first holding portion. A chucking device for holding an object by means of three points including a second holding part and a third holding part.
Since the arm main body is provided with the conversion mechanism so that the second holding part and the third holding part rotate in a direction approaching the first holding part with the horizontal linear movement of the holding part,
By moving the holding part, you can easily support objects,
And support release can be performed. Therefore, it is possible to easily attach / detach an object having a very small strength such as a molded body without requiring a complicated mechanism.

Therefore, by using the chucking device according to the first aspect of the present invention, it is possible to easily automate the process of taking out the molded body molded in the press molding process from the mold and carrying it to the next process.

According to another aspect of the chucking device of the present invention, the arm body includes a first arm connected to the expansion / contraction means and a first arm.
Since the elastic member is provided between the first arm and the second arm, the second arm is connected to the holding unit, and the first holding unit contacts the object by the extension of the first arm. It is possible to reduce the impact force at the time.

Therefore, according to the chucking device of the second aspect, the object can be held more softly without being damaged.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a chucking device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Arm main body 2 1st holding part 3 2nd holding part 4 3rd holding part 5 Tapered part (conversion mechanism) 6 Spring (elastic member) 7 Cylinder (expanding means) 8 Expandable arm (1st arm) 10 Pressure transmission rod ( 2nd arm)

Claims (2)

[Claims] 1. An object comprising three points, namely, a first holding portion formed on an arm body and movable in a horizontal direction, and a second holding portion and a third holding portion provided outside the first holding portion, respectively. A chucking device for holding the second holding part and the third holding part according to a horizontal linear movement of the first holding part.
The chucking device, wherein the arm main body is provided with a conversion mechanism so that the holding portion causes a rotational movement in a direction approaching the first holding portion. 2. The arm body has a first arm connected to the expansion / contraction means and a second arm connected to the first holding portion, and the elastic body is provided between the first arm and the second arm. The chucking device according to claim 1, wherein a member is provided.