JPH0137870Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a multi-connected natural clamp device for clamping a plurality of objects or one object to be clamped at a plurality of positions.

Background of the Idea When the object to be clamped is made of a cast metal, for example, dimensional variations tend to occur due to warping during molding. A natural clamp is required for such clamped objects.

In this natural clamp, the clamper changes its position according to dimensional variations in the workpiece, so that no overload is applied when clamping the object to be clamped.

On the other hand, when multiple objects to be clamped are lined up or when clamping one object to be clamped at multiple positions, multiple clampers are installed in a multi-connected state, and their clamping operations are linked. It is advantageous to do so.

Prior art As this type of multiple clamping means, Jikosho
There is an idea for No. 54-1637. The invention allows the clamping mechanisms to be interlocked when clamping multiple workbenches independently. However, since this clamp mechanism is not a so-called natural clamp, it cannot be used for the above-mentioned objects to be clamped.

Purpose of the invention Therefore, the purpose of the present invention is to enable a plurality of objects to be clamped to be fixed in a state of natural clamping, to enable the plurality of natural clamp mechanisms to be interlocked with each other, and to be able to be assembled in a small space. Moreover, it is desirable to be able to operate reliably with simple control operations.

Summary of the invention Therefore, the present invention is based on the idea that a plurality of presser pieces are biased in one direction inside a cylinder by independent springs, and the clamp pins are urged in the advancing direction by the springs while facing the inclined surface provided on the presser pieces. At the same time,
The rear end of the clamp pin is brought into contact with the same slope as the slope of the presser foot, and the tip of the clamp pin faces the clamping position of the object to be clamped while being biased in the advancing direction. The clampers are facing each other. This clamper is driven by a driving source such as a cylinder. Further, a lock pin is opposed to the presser foot so that it can freely approach and separate. This locking pin performs reciprocating motion using a cylinder or the like and restricts the movement of the presser foot piece. The presser pieces are lined up in a straight line, and move backward all at once in a contact relationship similar to that of a bead, and when moving forward, the amount of movement is changed in accordance with variations in the object to be clamped.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

The multiple natural clamp device 1 of the present invention is assembled inside a block-shaped main body 2. The main body 2 includes a plurality of cylinders 3 connected in the longitudinal direction inside the main body 2. And these tubes 3
has a plurality of presser pieces 4, for example, six presser pieces 4, slidably housed therein in the axial direction, and a spring seat 5 fixedly housed at a predetermined interval for each presser piece 4. ing. This spring seat 5, except for the one at the end, is provided with a guide hole 6 at the center, and is slidably fitted into a rod-shaped part 7 formed at one end of the presser piece 4 at this part. This rod-shaped portion 7 passes through the guide hole 6 of the corresponding spring seat 5 and corresponds to the end surface of the adjacent presser piece 4. For example, a compressed spring 8 is provided between each presser piece 4 and the corresponding spring seat 5, so that each presser piece 4 is biased rightward in FIG.

The presser piece 4 is formed with a key groove 9 along the longitudinal direction that corresponds to a screw-shaped key 10 attached to the cylinder 3, and also has an inclined surface corresponding to an inclined surface 12 at the end of the clamp pin 11. It has a surface 13 and an inclined surface 15 corresponding to the locking pin 14.

The clamp pin 11 is urged in a protruding direction by a spring 17 inside a guide sleeve 16 that is attached horizontally to the main body 2, and is provided with a groove 18 in the generatrix direction of the clamp pin 11 and a movement range regulating member. It is held slidably within a movement range regulated by pins 19. Further, the lock pins 14 are provided so as to be slidable vertically inside the main body 2 at positions corresponding to the inclined surfaces 15 of the respective presser pieces 4. The piston 21 is connected to the piston 21 . In this way, the clamp pin 11
A lock pin 14 is provided for each presser piece 4, and is provided to be slidable in the radial direction with respect to the cylinder 3. Note that ports 23 and 24 for the driving fluid 22 in the main body 2 reach the inside of the cylinder 20 with the piston 21 in between.

Further, a head cover 25 is attached to the other end of the cylinder 3. This head cover 25 slidably holds an operating rod 26 at its center position, has one end protruding to the outside, and has the other end facing the presser piece 4 at the terminal end so as to be movable toward and away from it. .

Further, the main body 2 slidably holds a piston rod 29 of a cylinder 28 by a sliding bearing 27 parallel to the clamp pin 11 above the cylinder 3. This piston rod 29 is regulated by a pin 42 and a groove 43, and the pin 30
supports the clamper 31 in a swingable state. Two perpendicular screws 32 and 33 are provided on this clamper 31 at positions corresponding to stoppers 34 and 35. and the cylinder 28
is attached to the back side of the main body 2, and takes in the driving fluid 38 from two ports 36 and 37.
The clamper 31 is driven. This clamper 31 is provided for each clamp pin 11, and its tip corresponds to the center of the clamp pin 11.

For example, three reference pins 39 are provided on the front side of the main body 2, and a positioning pin 40 is slidably provided for each reference pin 39 so as to be able to pass therethrough at an appropriate angle. These reference pins 39
The positioning pin 40 should be provided at an appropriate position according to the shape of the object 41 to be clamped.

Function of the device Next, the function of the multiple natural clamp device 1 will be explained.

First, the operating rod 26 is advanced to the left in FIG. 3, and all the presser foot pieces 4 are moved back against the spring 8 in a connected state. As a result, the inclined surface 13 of the presser foot 4 separates from the inclined surface 12 of the clamp pin 11, so that the clamp pin 11 is in a state where it can move backward against the spring 17, that is, move to the left in FIG. .

Next, the object to be clamped 41 is fitted into the reference pin 39 at the hole portion, and the positioning pin 40
It is fixed in a comb-like shape by the approach of Such a series of operations is performed manually or by an industrial robot for handling.

In this way, the back side of the object to be clamped 41 comes into contact with the tip of the clamp pin 11. At this time,
Even if there is dimensional variation in the clamped object 41, the left and right clamp pins 11 move back independently to absorb the variation. After that, when the operating rod 26 is moved backward, that is, to the right in FIG. 3, each presser foot piece 4 is pushed by the spring 8 and moves to the right in FIG. is brought into contact with the inclined surface 12 of the clamp pin 11. In this state, cylinder 20 takes in drive fluid 22 and locks pin 14.
Press the tip of the button against the inclined surface 15. In this way, the presser foot 4, the clamp pin 11, and the lock pin 14 are integrally fixed to the main body 2.

After such preparation, when the cylinder 28 pulls the piston rod 29 in the forward state toward the left in FIG. , and is fixed between the clamp pin 11 and the clamper 31. In this way, natural clamping is completed. Of course, the positions of the perpendicular screws 32 and 33 are adjusted in advance.

In addition, to release the clamp, contrary to the above clamping operation, first release the clamper 31, then move the lock pin 14 backward, and then move the operating rod 26 to the left in FIG. Retract the presser foot 4. In this way,
The clamped object 41 comes to be removed from the clamp position. At this time, the rod-shaped portion 7 of the presser foot 4 hits the tip of the adjacent succeeding presser foot 4, so that all the presser foots 4 sequentially retreat as if in a collision.

Modified example of the invention In the above embodiment, two clamp positions are set for each of the three clamped objects 41, but the number of such clamp positions may be one for each clamped object 41. , or there may be three or more locations. Therefore, presser foot 4
It is sufficient if there are at least two or more.
Further, in the above embodiment, the operating rod 26 is planned to be operated manually;
Of course, the driving means may be a reciprocating driving means such as a cylinder.

Effects of the invention In this invention, the multiple presser pieces are interlocked in the backward direction, and are mutually independent in the forward direction, and act on the corresponding clamp pins on the slope, making it possible to independently set the amount of advance of the clamp pins. , it is possible to realize a natural clamp that responds to dimensional variations. In addition, these presser pieces are arranged in a straight line inside the tube, and the clamp pins and lock pins are provided radially for each presser piece, so these interlocking mechanisms allow the clamping position to be placed in a relatively small space. It can be easily incorporated into each interval.

[Brief explanation of drawings]

Fig. 1 is a front view of the multiple natural clamp device of the present invention, Fig. 2 is a vertical sectional view of a part of the device,
FIG. 3 is a horizontal sectional view of the main parts of the device. 1...Multiple natural clamp device, 2...Main body, 3...Cylinder, 4...Presser piece, 5...Spring seat, 7
... Rod-shaped part, 8 ... Spring, 11 ... Clamp pin, 12, 13 ... Inclined surface, 14 ... Lock pin, 15 ... Inclined surface, 17 ... Spring, 18
...groove, 19 ... pin, 26 ... rod for operation, 31 ... clamper, 41 ... object to be clamped.

Claims (1)

[Scope of utility model registration request] Spring seats provided at intervals within the cylinder, and a presser piece that is slidable between each spring seat via a spring,
A clamp pin with an inclined surface at the same angle facing the inclined surface provided on the side surface of each presser piece and supported so as to be slidable in the radial direction with respect to the cylinder, a spring that biases the clamp pin in the radial direction, and a clamp. A pin movement range regulating member, a clamper that faces the tip of the clamp pin and moves reciprocally, a presser piece that has a rod-like part that can penetrate through a spring seat and freely come into contact with an adjacent presser piece, and It is equipped with a rod that reciprocates and faces the presser piece at the end so that it can freely come into contact with it, and a lock pin that freely moves forward and backward in the radial direction of the cylinder and faces the presser piece,
A multiple natural clamp device characterized in that an object to be clamped is held between a clamp pin and a clamper.