JPS6099536A - Chuck device - Google Patents

Abstract

PURPOSE:To ensure chucking work, by coupling a second finger to a driving portion for a first finger to move both the fingers together. CONSTITUTION:When fingers 26, 27 are open, the body 21 of a chuck is placed on a workpiece A and air is supplied through an air pipe 30 to protrude a piston 28. As a result, the point 26b of action of the first finger 26 is turned, against a spring 38, in such a direction as to approach the workpiece A. At the same time, an arm 44 is moved in a direction as shown by an arrow in the drawing, to turn an auxiliary driving member 40 to operate the second finger 27 through the engagement of teeth 39, 42. As a result, the workpiece A is chucked by both the fingers 26, 27.

Description

[Detailed description of the invention] 〔Technical field〕 This invention relates to a chuck device.

[Background technology]

The chuck device is used as a transfer means for automatic product assembly and the like. Conventionally, there have been devices in which only one of a pair of fingers that grips a workpiece is driven. but,
As shown in FIGS. 1 and 2, there is a drawback that extremely high accuracy is required in positioning the chuck device 2 with respect to the workpiece 1. In other words, if the fingers 3.4 are too far to the left in FIG. 1 with respect to the workpiece 1, the workpiece 1 will be chucked by the side surface 5a of the pallet 5 and the movable finger 4, so when the chuck device 2 is raised, the workpiece 1 will fall. do.

Furthermore, if the chuck device 2 is too close to the right side with respect to the workpiece 1, the fixed side fingers 3 will hit the workpiece 1 when descending.

Therefore, conventional examples in which a pair of fingers are driven are shown in FIGS. 3 to 5. That is, the chuck body 6
The middle part of the finger 7 is supported by a shaft 9 at one end, and the tip of the piston 12 of the air cylinder device 11 provided in the chuck body 6 is opposed to the drive part 8 at the rear end of the finger 7. is pressed against the piston 12 by the spring 13. Further, an end of a finger 14 is supported on a shaft 10 at the other end of the chuck body 6, and a shaft 15 of the drive section 8 and a shaft 16 of the intermediate portion of the finger 4 are connected by an arm 17. Cylinder device 1
When air is injected into the piston 1 and the piston 12 is pushed out, the finger 7 moves in the direction of the arrow Km, and at the same time the arm 17 moves in the direction of the arrow, so the finger 14 moves in the direction of the arrow and therefore grips the workpiece 18. Become.

However, in this chuck device, in order to equalize the amount of movement of the points of action 7a and 14a of both fingers 7.14, the lever ratio l, 12. as shown in FIG. l engineering'.

I! From the design of 2', the fulcrum position (9) and the driving shaft force point (1
5).

Driven shaft force point (16), finger action point 7a,
The relationship between 14a is determined automatically and the dimensions are fixed.

Moreover, since the connecting arm 1γ protrudes downward from the chuck main body 6 and protrudes into the area where the workpiece 18 is to be chunked, the chuck is obstructed by hitting other parts and mechanisms during the chuck operation. Furthermore, attempts to prevent this have the disadvantage of increasing the size.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a chuck device that is easy to design, does not hinder the workpiece chuck operation, and can be downsized.

[Disclosure of the invention]

In the present invention, the intermediate portions of a pair of fingers are pivotally supported so that they face each other, and the driving means drives the driving section of the first finger, and at the same time, the auxiliary driving means interlocked therewith drives the driving section of the second finger. It is characterized by being driven. This makes the design easier, and since the arm does not protrude toward the workpiece as in the conventional case, it can be made smaller and does not interfere with the chuck operation.

A first embodiment of this invention is shown in FIGS. M6 to FIG.

That is, the chuck body 21 attached to the tip of the mounting shaft 20 has an air cylinder device 22 built therein, and the intermediate portions of the pair of fingers 26, 27 are pivotally supported by the arms 23 at both ends of the chuck body 21 by shafts 24, 25. Ru. In the air cylinder device 22, the tip of a piston 28 faces the rear end of the first inger 26, and air injection into the cylinder 29 is connected to a compressor 32 via an air pipe 30 and a control valve 31. 33 is a control unit that controls the control valve 31;
34 is a blind lid that closes the hole 35 required for processing. JEX 'Jh part 26a of finger 26.27.

Shafts 36, 37 are provided at the rear ends of the fingers 27a, and a tension spring 38 is suspended between the shafts 36, 37 to actuate the points 26b of the fingers 26, 27.

27b are urged in a direction to separate from each other. At the same time the first
The driving portion 26a of the finger 26 contacts and is supported by the tip of the piston 28. On the other hand, the second finger 27 has a toothed portion 39 carved in its shaft portion with the shaft 25 as the center of rotation.
An auxiliary drive body 40 is supported by a shaft 41 adjacent to the second finger 27 . The auxiliary drive body 40 has a toothed part 42 centered on a shaft 41 and meshes with the toothed part 39, and the shaft 43 at the end of the auxiliary drive body 40 and the shaft 36 of the first finger 26 are connected by an arm 44. connected. 45 is the control side of the control valve 31. FIG. 8 shows the state in which the workpiece is chucked. That is, with the fingers 26 and 27 open, the chuck device main body 21
is placed on the workpiece A, and air is fed into the cylinder 29 from the air compressor 32 to cause the piston 28 to protrude. Accordingly, the point of action 26b of the first finger 26 rotates in the direction approaching the workpiece A against the spring 38, and at the same time, the arm 44 moves in the direction of the arrow to rotate the auxiliary drive body 40. , the second finger 27 moves as shown by the arrow through the engagement of the teeth 39 and 42. As a result, the workpiece A is chucked by both fingers 26 and 27.

FIG. 9 shows a state in which the workpiece A is released, and when the air in the cylinder 29 is released by the control valve 31, the spring 38
At the same time as the piston 28 retreats due to the return action of
The finger 26 of the arm 44 returns to its original position.
, the auxiliary drive body 40 and the second finger 27 perform a return operation, and the workpiece A leaves the fingers 26.27.

In this way, this chuck device has a pair of fingers 26
．． Since the arms 27 move relative to each other, the workpiece A stored in the tray can be reliably chunked, and since the arm 44 does not protrude toward the workpiece A side as in the conventional case, it obstructs the chucking operation, and the size of the workpiece can also be reduced. be able to. Furthermore, it is easier to design than conventional methods. Also finger 26.27
The arms 44 and the teeth 39 are connected to each other via the auxiliary drive body 40.
Since they are connected at 42°, transmission efficiency is high. Further, since the arch cylinder device 22 is provided inside the chuck body 21, further miniaturization can be achieved. Furthermore, this chuck device can be disposed in both the X and Y directions.

A second embodiment of this release is shown in FIGS. 10 and 11. That is, in the first embodiment, the arm 44' is formed by a first arm 47 having a left-hand thread 46, a second arm 49 having a right-hand thread 48, and a nut 50 connecting these. The entire length of the arm 44' can be extended or contracted depending on the direction of rotation, as shown in Figures 10 and 1.
Figure 1 shows the arm length P when the nut is rotated 5 degrees. , P yo wo P. > P Yu. In addition, when the fingers are tilted as shown in Fig. 11, for example, a workpiece whose both sides are parallel sloped surfaces can be held by the fingers 26 and 27, and the workpiece can be prevented from falling due to point support. The supporting state of the workpiece is stabilized. The rest is the same as the first embodiment.

Note that the auxiliary drive body 40 and the drive section of the second finger 27 may be frictionally engaged with each other by a roller made of rubber or the like. Further, the air cylinder device 22 that drives the fingers 26 is not limited to this, and any driving means may be used.

〔Effect of the invention〕

As described above, the chucking device of the present invention has the advantage of being easy to design, capable of reliably chucking a workpiece without interfering with the conventional method, and moreover, being miniaturized.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the chuck process in the conventional example, Fig. 2 is a perspective view of the workpiece, Fig. 3 is a perspective view of another conventional example, Fig. 4 is its sectional view, and Fig. 5 shows its lever ratio. Operation diagram to explain,
FIG. 6 is a perspective view of the first embodiment of the invention, FIG. 7 is a sectional view thereof, FIG. 8 is a partially sectional side view in the chuck operating state, and FIG. 9 is a partially sectional side view in the chuck released state. 10th
The figure is a partial cross-sectional side view of the second embodiment, and FIG. 11 is a partial cross-sectional side view of the second embodiment with the finger pinch changed. 22... Air cylinder device (driving means), 26...
- First finger, 26a...driver, 27...second finger, 27a...driver, 39.42...
Tooth portion, 40, . . . Auxiliary drive body (auxiliary drive means) 5a 1 5 Fig. 1 Fig. 2

Claims (3)

[Claims] (1) first and second fingers whose intermediate portions are pivotally supported and face each other; a driving means for driving a driving section of the first finger; and a driving means for driving a driving section of the first finger; and auxiliary drive means for driving a finger drive section. (2) The chuck device according to claim (1), wherein the driving means is an air cylinder device. (3) The chuck device according to claim 1 or 2, wherein the second finger drive section and the auxiliary drive means are in mesh with each other through gears.