JPH0541684U - Work clamp device - Google Patents

Abstract

(57) [Abstract] [Purpose] The work clamp device 1 is configured so that the impact when the protrusion 14a of the clamp arm 14 contacts the second work W2 is suppressed as much as possible. It is possible to prevent damage to the two works W1 and W2 and to reliably prevent the positional deviation of the first and second works W1 and W2. [Structure] A first telescopic cylinder 15 for rotating a clamp arm 14 by abutting on one end side, and a projection 14a of the clamp arm 14 for actuating the first telescopic cylinder 15 and a first work W1 on the mounting table 2. Second work W fitted to
The spring 16 that urges the clamp arm 14 until it abuts on the second arm 2 and the protrusion pin 13 of the lever 12 that abuts immediately before the protrusion 14a of the clamp arm 14 abuts the second workpiece W2 to rotate the clamp arm 14. Clamp arm 1 once stopped or separated from protruding pin 13
And a second telescopic cylinder 17 for releasing the stopped state of No. 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work clamp device that clamps a work set on a mounting table by a clamp mechanism.

[0002]

[Prior Art]

 Conventionally, such a work clamp device clamps a work set in advance on a mounting table by abutting the work by operating a clamp arm of a clamp mechanism provided on the mounting table with an actuator or the like. I am doing it.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned case, if the work itself is thin or soft, the work may be damaged by the impact when the clamp arm operated by the actuator or the like comes into contact with the work.

If an impact force is exerted on the work when the clamp arm comes into contact with the work as described above, when the work is composed of two works, the works are misaligned with each other or the works are placed on each other. There is also a risk that the work will be displaced from the top of the table.

The present invention has been made in view of the above points, and an object of the present invention is to construct a work clamp device in which the impact when the clamp arm contacts the work is suppressed as much as possible. Therefore, the work is prevented from being damaged, and the work position is surely prevented from being displaced.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a solution means taken by the present invention is to clamp a work set in advance on a mounting table by abutting the work by operating a clamp arm of a clamp mechanism provided on the mounting table. It is premised on the work clamp device. Then, a first actuator that operates the clamp arm, an urging member that urges the clamp arm until it contacts the workpiece by the operation of the first actuator, and the clamp arm immediately before the clamp arm contacts the workpiece. The second actuator for releasing the stopped state of the clamp arm after the operation of the actuator is once stopped is provided.

[0007]

[Action]

 With the above structure, according to the present invention, when the work set in advance on the mounting table is clamped by the clamping mechanism provided on the mounting table, the clamp arm of the clamping mechanism is operated by the first actuator, With the operation of the first actuator, the urging member urges the clamp arm until it comes into contact with the work. Then, immediately before the clamp arm comes into contact with the workpiece, the operation of the clamp arm is temporarily stopped by the second actuator, the stopped state of the clamp arm is released, and the clamp arm in the state immediately before coming into contact with the workpiece is released. It is newly urged by the urging member and contacts the work.

As described above, the operation of the clamp arm is stopped immediately before it comes into contact with the work, and from this state, the clamp arm is applied to the work by a minute urging force newly urged by the urging member. Since the contact is made, even if the work itself is thin or soft, the impact when the clamp arm operated by the actuator or the like makes contact with the work is suppressed as much as possible.

Further, as described above, since the clamp arm comes into contact with the work with a minute urging force newly urged by the urging member from the state immediately before the contact with the work, the clamp arm comes into contact with the work. In doing so, even if the work is composed of two works, the works do not shift from each other and the work does not shift from the mounting table.

[0010]

[Effect of the device]

 As described above, according to the work clamp device of the present invention, the operation of the clamp arm that urges the first actuator until it contacts the work by the urging member is performed immediately before the second actuator contacts the work. , The stop state is released, and the clamp arm is brought into contact with the work with a new minute urging force of the urging member from the state immediately before contacting the work, and the work is clamped by the clamp mechanism. Even if the clamp arm itself is thin or soft, the impact when the clamp arm comes into contact with the work is suppressed as much as possible, damage to the work can be prevented, and at the same time the work consists of two parts. It is possible to reliably prevent positional deviation of the work such as misalignment between the work pieces and work on the mounting table.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a work clamp device 1 according to an embodiment of the present invention, and this work clamp is executed by a station ST provided in the midway of a conveyor system path (not shown). That is, when the mounting table 2 is conveyed to the station ST by the above conveyor, the first work W1 is positioned and set by the positioning pins 3 provided on the mounting table 2, and the center of the first work W1 is set. The second work W2 is fitted into the concave portion 4 provided in the second work W2, and the clamp arm 14 of the clamp mechanism 10 described later is brought into contact with the second work W2. It is being clamped against it and then transported to the next station.

Further, the mounting table 2 is provided with a clamp mechanism 10, and the clamping mechanism 10 includes a pillar portion 2 a protruding upward from one end side (left side in the drawing) of the upper surface of the mounting table 2. A lever 12 whose one end is pivotally supported at one end on the side of one side via a rotary shaft 11, and a protruding pin which extends through the other end of the lever 12 in the front-rear direction (in the front in the figure) and extends parallel to the rotary shaft 11. 13 and a substantially L-shaped clamp arm 14 pivotally supported at the other end of the column 2a of the mounting table 2 on the side of the other side so as to be rotatable integrally with the lever 12 via the rotary shaft 11. A protrusion 14a is provided at the tip of the clamp arm 14 as a pressing member for the work W2. The operation source for operating the clamp mechanism 10 is provided on the lower side of one end side of the mounting table 2 conveyed to the station ST, and contacts the lower surface of one end side of the clamp arm 14 at the time of extension so as to contact the clamp arm. A first telescopic cylinder 15 as a first actuator that rotates (operates) the boom 14 so as to bounce upward, a base end of the pillar portion 2a of the mounting table 2 and an intermediate portion on the other end side of the clamp arm 14 described above. And a protrusion 14a provided on the lower surface of the other end of the clamp arm 14 by the extension of the first telescopic cylinder 15 as a biasing member until it abuts against the second work W2. Of the clamp arm 14 is provided on the upper side of one end side of the mounting table 2 above, and contacts the front end (front side in the figure) of the protruding pin 13 of the lever 12 during extension. The rotation of the clamp arm 14 is temporarily stopped immediately before the protrusion 14a of the clamp arm 14 comes into contact with the second work W2, and when contracted, the clamp arm 14 is released from the front end of the projecting pin 13 of the lever 12 to release the stopped state. And a second telescopic cylinder 17 as a second actuator, and the work sources 15, 16, 17 and the clamp mechanism 10 constitute the work clamp device 1.

Next, at the station ST, the second work W2 is fitted into the recess 4 of the first work W1 on the mounting table 2, and the clamp arm 14 of the clamp mechanism 10 is brought into contact with the second work W2. The first or third step for clamping the first work W1 will be described. First, in the first step shown in FIG. 1, the first work W1 is positioned and set by the positioning pins 3 and 3 on the mounting table 2, and the second work W2 is fitted into the recess 4 of the first work W1. Let Next, in the second step shown in FIG. 2, after the second telescopic cylinder 17 is extended, the first telescopic cylinder 15 provided on the lower side of the one end side of the mounting table 2 is extended and one end of the clamp arm 14 is extended. The clamp arm 14 is caused to abut on the lower side surface, and the clamp arm 14 is rotated so as to bounce upward by this abutment. With this rotation, the protrusion 14a of the clamp arm 14 is moved to the first position by the urging force of the spring 16 which is linked between the base end of the column portion 2a of the mounting table 2 and the intermediate portion on the other end side of the clamp arm 14. 2 The workpiece W2 is rotated so as to come into contact with it. Then, the protruding pin 13 of the lever 12 is brought into contact with the rod of the second telescopic cylinder 17, and this contact causes the clamp arm 14 to rotate upward, that is, the protrusion 14a of the clamp arm 14 by the spring 16 to move to the second position. The rotation until contacting the work W2 is temporarily stopped immediately before the protrusion 14a of the clamp arm 14 contacts the second work W2. In this case, the first telescopic cylinder 15 contacts the lower surface of one end of the clamp arm 14 and flips up the clamp arm 14 to move the protrusion 14a of the clamp arm 14 by the spring 16 to the second work W2. When it starts to rotate in the direction of contact, it contracts immediately.

Thereafter, in the third step shown in FIG. 3, the rod of the second telescopic cylinder 17 is separated from the front end of the protruding pin 13 of the lever 12 by contracting the second telescopic cylinder 17, so that the clamp arm 14 of the clamp arm 14 is retracted. By releasing the stopped state and immediately contacting the second work W2, the protrusion 16a of the clamp arm 14 is biased by the spring 16 and brought into contact with the second work W2. Clamp against. Then, after performing work such as brazing or screwing on the clamped first and second works W1 and W2, the first and second works W1 and W2 are carried out to the next station together with the mounting table 2. To do.

According to the work clamp device 1 as described above, the rotation of the clamp arm 14 is temporarily stopped immediately before the protrusion 14a comes into contact with the second work W2, and the spring 16 is actuated by the spring 16 in this state. Since the protrusion 14a of the clamp arm 14 contacts the second work W2 by the newly applied minute biasing force, even if the first and second works W1 and W2 themselves are thin or soft, the clamp is performed. The impact when the protrusion 14a of the arm 14 contacts the first and second works W1 and W2 is suppressed as much as possible, and damage to the first and second works W1 and W2 can be prevented.

Further, as described above, the protrusion 14a of the clamp arm 14 contacts the second work W2 with a minute biasing force newly urged by the spring 16 from the state immediately before contacting the second work W2. Therefore, when the protrusion 14a of the clamp arm 14 contacts the second work W2, the first and second works W1 and W2 are displaced from each other, or the first work W1 is displaced from the mounting table 2. Therefore, it is possible to reliably prevent the displacement of the first and second works W1 and W2.

It should be noted that the present invention is not limited to the above-described embodiment, but includes various other modified examples. For example, in the above embodiment, the work is composed of the two first and second works W1 and W2, but a single work may be clamped on the mounting table by a clamp arm. Another work may be attached to the single work thus formed by adhesion or the like.

Further, in the above embodiment, the first and second telescopic cylinders 15 and 17 are used as the first and second actuators, but actuators such as motors may be used. Further, in the above embodiment, the spring 16 is used as the biasing member, but a biasing member such as rubber may be used, and the protrusion of the clamp arm is biased until it abuts the work on the mounting table. Any biasing member may be used.

[Brief description of drawings]

FIG. 1 is an operation explanatory view of a first step by a work clamp device.

FIG. 2 is an operation explanatory view of a second step according to FIG.

FIG. 3 is an operation explanatory view of a third step according to FIG.

[Explanation of symbols]

 1 Work Clamp Device 2 Mounting Table 10 Clamp Mechanism 14 Clamp Arm 15 First Telescopic Cylinder (First Actuator) 16 Spring (Biasing Member) 17 Second Telescopic Cylinder (Second Actuator) W1, W2 Work

Claims (1)

[Scope of utility model registration request] 1. A work set in advance on a mounting table,
In a work clamp device in which a clamp arm of a clamp mechanism provided on a mounting table is operated to abut on a work for clamping, a first actuator that operates the clamp arm and an operation of the first actuator are performed. An urging member for urging the clamp arm until it abuts on the work, and a second means for temporarily stopping the operation of the clamp arm immediately before the clamp arm abuts on the work and then releasing the stopped state of the clamp arm.
A work clamp device comprising an actuator.