JPS6316905A - Four-claw chuck - Google Patents

Abstract

PURPOSE:To enable chucking strongly an article of asymmetric shape by moving each of claws crossing othogonally and opposing each other via a wedge type member through a time lag with front and back pistons fitted to front and back cylinder chambers concentrically within a chuck proper. CONSTITUTION:A cylinder chamber 4 in a chuck proper 1 is supplied with compressed air from a port 21 and a front piston 7 retreats. And among four claws, an opposing claw 12 is moved for contraction with the inclined guide groove 11 of a wedge type operation member 9 fixed with a bolt 8. And 1-3 seconds later, another cylinder chamber 5 is supplied with compressed air from a port 23 and then a piston 14 retreats, thereby moving the other opposing claw for contraction with a wedge type operation member 16 fixed with a bolt 15. Therefore, a workpiece chucked from one axial direction of crossing axes can be moved by chucking motion from the other axia direction and a workpiece asymmetric in vertical and transverse directions can be strongly chucked with the center point thereof determined preliminarily.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a four-jaw chuck that can hold a workpiece of 1 gj.

(Prior Art) A four-claw tip has 77 claws arranged on perpendicular lines, and these claws expand and contract in a radial direction.

For this reason, it is convenient to make one corner (one-shape addition) piece, but one that has a vertical cross section of h/right symmetry C<C, one that does not have bottom symmetry C, and an irregularly shaped piece b. It is extremely difficult to move the soft jaws in order to select the soft jaws, and it is difficult to find the center of machining of the workpiece.

(Problems to be Solved by the Invention) The conventional four-jaw chuck cannot find the center point of machining workpieces such as those that are not horizontally symmetrical, vertically symmetrical, irregularly shaped, etc., and cannot move them powerfully. There was a problem.

(1st step to solve the problem) According to the present invention, among the claws arranged on lines perpendicular to each other, the expansion/contraction movement of one opposing claw and the opposing expansion/contraction movement of the center horn are operated separately. A four-claw tool that gives a time difference to find and powerfully grasp the center point of machining workpieces that are not symmetrical in the longitudinal section, those that are not symmetrical on the top, and those that are irregularly shaped. A bottom cylinder chamber and a rear cylinder chamber are formed by communicating with each other through a circular guide hole provided in a partition A in the main body and arranged on the same axis. A piston is inserted into the front cylinder chamber, and a model actuating member is fixed to this (+F+ screw), one of the opposing claws being actuated at the same time. At the same time as fitting and inserting the flange of the rear screw [-], the body is inserted into the guide hole and the guide hole of the front screw I, and the slider 7f is inserted into the guide hole of the model operating member.
For those who are going to insert it into the body, fix another model f1 movable part, which has four claws, one horn, and one opposite claw, to the small diameter part of the 6FI body. T, -1) of the four claws, the opposite claw l't￥ lj direction expansion/contraction movement and the other opposing claw t
In addition, a small amount of expansion/contraction movement in the direction of the Y force is applied] 1-The time λ is given at the time of the movement of the object to make it actuate (J, -).
Lli the four claws! There is something C to offer.

(Function) When the front piston is actuated, the model actuating member is actuated to retract one of the opposing pawls, and after a very slight delay, the rear screw is actuated, and the other one is integrally moved. nll1 wedge-shaped shaft member
By retracting the opposing claws of IJ S1 (and 7'J), the workpiece can be centered and the workpiece can be strongly supported.

(Example) An example of the present invention will be explained with reference to FIGS. 1 to 6.

The four-claw jitoku 1 is located inside the J-dock main body 2 from the rear.
1, 1 house V3 is staged () (There is a front cylinder chamber 4 on the front side of the partition wall 3, and a rear cylinder chamber 5 on the rear side. The front cylinder chamber 4 and the rear cylinder chamber 55 are communicated through the hole 6, and the front cylinder chamber 4, the rear cylinder Y35, and the guide hole 0 are arranged on the same axis around the hole 6.

Next (・, slide the front piston 7 into the front cylinder chamber 4
The front piston 7 has a guide hole 71) in the axial direction along the right side of the flange 7a.
The flange portion 7a can freely come into contact with the stepped portion 4a of the front cylinder chamber 4.

Also, there are mounting holes (-j pole) -8, 8 on the front end surface of the front piston 7.
, 8, 8, and the model operating member 9 is formed with an inclined guide groove 11° 11 having a T-shaped cross section in the guide hole 10 with m steps in the @ line direction. be.

The inclined guide groove 11.11 has one of the four opposing claws, in this example, the master ji B-12,1 in the direction of the Y-Y axis 7j.
2 are simultaneously moved forward in the direction G around the center to retract or expand around the center Jζ.The blade-shaped members 13 formed on the master cage 41-12 are fitted into the inclined guide grooves 11 and 11, respectively. There is insert C.

Next, the flange 14 of the rear screw 14 is inserted into the rear cylinder chamber 5.
a (!- At the same time, the body part 1/lb is slidably inserted into the guide hole 6 and the guide hole part 7b of the front piston 7, and the small diameter part 1/lb formed at the front end of the body part 1/Ib is inserted. l
c to Ill/(-1) Another model retaining part 16 fixed via the bolt 15 is inserted into the guide hole 10 of the model operating part +A9.
There is an IN insertion C in sliding automatic f1, another model 0 moving part 1, 1
16G, Lmt, and one side inclined guide groove 17.17 is formed.

The slanted guide groove 17.17 has four opposite claws, in this example, the number, tx-x@ direction, the masterage Fl-18,
18 at the center at the same time (track number)
January 1st, expand from the center at the same time, master jo 1
-18.F-shaped member 19 formed at 18 is guided 1M1
7 and 17, respectively.

6F + front cylinder chamber 4 is supplied with bar compressed air for tightening, and cylinder chamber J is supplied with compressed air for tightening, and cylinder chamber 4 is supplied with compressed air for opening, and rear cylinder chamber 4 is supplied with compressed air for tightening. The ports 1 to 22J are configured to supply 11 compressed air for tightening, and J to supply 1 air for hearing from boat 23.

18 each has a strong name for Nnoto Tsume (shown in the illustration).

Figures 5 and 6 show the operation system for Tsuku 1. T.

Refer to Figure 55-C, port 22 of the rear cylinder chamber t]
is connected to the pneumatically operated valve 24 through the lead 25, and the boat 2
3 is connected to the bows i to 21 of the front cylinder chamber 1 through the conduit 26, and the bows 1 to 20 are connected to the pneumatically operated valve 2/I via the flow regulating valve 28 via the conduit 30, and the conduit 91:26 The end of the branch pipe 31 is connected to the electromagnetic valve 27, the branch pipe 32 from the conduit 30 between the flow M adjustment valve 28 and the pneumatically operated valve 24 is connected to the compressed air tank 33, and the conduit 29 is connected to the compressed air tank 33. Another branch pipe 34 was connected to the electromagnetic tr2-/, and the operation sequence was as shown in FIG.

That is, when the front piston 4 reaches the movement end point (b) from the linear movement start point (a), the rear piston 5 starts linear movement. After this, the linear motion start point of the piston 5 is exactly 1 to 53 seconds apart from the contraction start point (A) of the front piston 4. The front piston 4 is used to tighten the workpiece in the Y-Y axis direction (1).
The workpiece can be transferred by tightening the claws in the direction of the ) (Additional 1-It is the formation of the object (゛Sa centering 1!IruJ,''), and the opening of the claw 1.i X-X axis horn direction, Y-Y
J who listens to the direction of Sono J at the same time is very formative. .

Boat 20J: When supplying 14 compressed air, Y-Y axis 1/
Instage I-'12.12 facing J is facing the center)
('ni'i Shinshi, manipulate the workpiece from the Y-YN-Ij direction.

Next, the compressed air is sent slightly closer to - (Bow 1 to 22J, SH), and the instige -1-18°18 in the X- X-axis 1] Direction 1λ, 1 Ht force in the direction of the Y-Y axis, 111 force in the direction of the of L [Area of compressed air working surface
1-Using the difference, the C effective 11 (]J difference is I) is applied, and the previously held workpiece is moved by the next transverse direction from the orthogonal lJ direction, and centering is performed. be able to.

Since the present invention is configured as described above, when compressed air is supplied from the boat 20 to the front side chamber of the flange portion 7a of the front piston 7 in the front cylinder chamber/1 and the front piston 7 is moved backward, the cylinder The shape actuating member 9 is retracted and the master jaw 12.
12 are moved forward toward the center of each other in the Y-Y axis direction, and the workpiece is moved from the Y-Y axis direction using the soft I to claws.

Next, when the compressed air 11 is supplied from the boat 22 with a slight delay to the front chamber of the flange 14a of the rear piston 14 in the rear cylinder chamber 5 and the rear piston 14 is moved backward, the tree-shaped actuating member 16 is moved back together. Master Joe 18.18 x
- Advance the workpiece in the direction of the X-axis toward the center in the direction of the With the soft claw C piece, the workpiece can be completely and strongly protected from the X-X axis direction and the Y-Y axis direction.

In this way, determine J: (j along the Y-Y axis of the object, then X-X!1III
/) Determine the middle Jj1 along the X-X axis of the workpiece facing (
Easy to center.

(Effects of the Invention) The present invention aims to reduce the time difference between the assembled states of one axis and the other axis that intersect with each other through the rear piston.
j, and move the object that is in a state of collision from the direction of the axis 1h that intersects the tip by 1'1 to the balance movement from the next other axis direction. Since the vertical section is not symmetrical, it is a strange addition to the toss and 1st person C and b.
It is very convenient to incorporate it into a gripper VsM4, which is installed in the machine, and is also extremely effective as a four-jaw grip for machining.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the J-yack of the present invention corresponding to the Y-Y line in Fig. 2, Fig. 2 is a front view of the book of the present invention, and Fig. 3 is a tree that operates the pawl in the Y-Y axis direction. a perspective view of the shaped actuating member;
Fig. 4 is a perspective view of the tree-shaped actuating member that operates the pawl in the X-X@t'r direction, and Fig. 5 shows the tree-shaped actuating member that operates the pawl in the Y-Y axis direction and the X-X axis. FIG. 6 is a system diagram showing an example of the operation system, and FIG. 7 is an operation diagram thereof. 1...4-jaw chuck, 2...°y yack body, 3
...l longing, 4...front cylinder chamber, 5...rear cylinder chamber, 6.10...guide hole, 7...front piston,
7a, 14a...flange part, 7b...guide hole part, 9°1
6...Tree-shaped actuating member, 14...Rear piston, 14b
...Body part, 14C...Small diameter part.

Claims (1)

[Claims] A front cylinder chamber and a rear cylinder chamber are communicated with each other via a guide hole penetrated through a partition wall in the chuck body and arranged on the same axis to form a front cylinder chamber and a rear cylinder chamber, and a front piston is fitted into the front cylinder chamber. , a wedge-shaped actuating member that simultaneously operates one of the four opposing claws is fixed to the front piston, and a flange of the rear piston is fitted into the rear cylinder chamber;
Another method in which the body is fitted into the guide hole and the guide hole of the front piston, and is slidably fitted into the guide hole of the wedge-shaped actuating member, and simultaneously operates the other opposing claw of the four claws. A wedge-shaped actuating member is fixed to the small diameter portion of the body, and the radial expansion/contraction movement of one opposing pawl of the four pawls and the radial expansion/contraction movement of the other opposing pawl are controlled by a time difference at least when gripping the workpiece. A four-jaw chuck characterized in that it is activated by giving a