JPH0911011A - Scroll chuck - Google Patents

Abstract

PURPOSE: To change the number of claws of a scroll chuck easily, move a position of the claw to an arbitrary position on circumference of a scroll receive base, and enable minute adjustment of advance and retraction of the claw itself. CONSTITUTION: A scroll 3 which moves in the circumferential direction is provided on a scroll receive base 2. A rack 8 provided on a rear face of a scroll nut 9 meshes with a scroll tooth 3B. A groove of a holder 5 is fitted into a projection provided on both sides of the scroll nut 9 from both sides of the scroll nut 9. The holder 5 is detachably fixed on the scroll receive base 2 by a bolt 7. A claw which advances and retracts in the central direction of a main body from an adjustment screw is provided on the scroll nut 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll chuck for turning.

[0002]

2. Description of the Related Art In a conventional scroll chuck, since the mounting position of the claws is fixed, when changing the number of claws,
I had to replace the entire chuck.

[0003]

When the mounting position of the claws is fixed as described above, the work cannot be gripped unless the number of the claws is changed depending on the shape of the work. The entire chuck must be replaced. However, the replacement work was very troublesome and had a significant effect on work efficiency.

From the above point of view, according to the present invention, the number of claws of the scroll chuck can be easily changed, the position of the claws can be moved to any position on the circumference of the scroll pedestal, and the fine adjustment of the forward and backward movement of the claws can be performed. The present invention intends to provide a scroll chuck that enables the above.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a pair of left and right holders for sandwiching and guiding a scroll nut from both sides are detachably fixed to a scroll pedestal. The rack provided on the rear surface meshes with the scroll teeth of the scroll that moves in the circumferential direction on the scroll pedestal, and projections are provided on both sides of the scroll nut, and the projections are on the scroll nut side of the holder on the main body. The scroll nut is slidably fitted in a groove formed toward the center, and the scroll nut is provided with a pawl capable of adjusting the forward and backward movement toward the center of the main body by an adjusting screw.

[0006]

To explain the operation of the present invention, when the scroll moves in the circumferential direction, the scroll nut whose rear surface meshes with the scroll teeth has protrusions on both sides thereof fitted into the grooves of the holder and the holder scrolls. Since it is fixed to the pedestal, it moves toward the center of the main body, and the work is fixed by the claw attached to the scroll nut.

Since the holder is detachably attached to the scroll pedestal, it can be moved in the circumferential direction.
The setting position of the nail can be set to any position. At this time, the tip of the pawl does not lie on the same circumference because the distance from the center of the main body varies depending on the position where the scroll nut is attached to the scroll.Therefore, turning the adjusting screw advances and retracts the pawl. It is possible to make fine adjustments so that the tips of the are located on the same circumference.

The holder thus attached at several places is
It is possible to select and use the holder at the required location, adjust the holder interval according to the number of claws, and set it by shifting the position, but the fact that the claw itself can be finely adjusted is not limited to a round work Even if the shape and the shape are distorted, the chucking is possible by supporting four or more points.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the scroll chuck of the present invention, which is partially longitudinally cut, FIG. 2 is a front view of the same, and FIG. 3 is a partial perspective view of the same. In the scroll chuck of the present invention, a ring-shaped scroll support 2 is provided on the front surface of a main body 1, a tooth portion 3A is provided on a rear surface in the circumferential direction of the scroll support 2, and a scroll 3 having front screw-shaped scroll teeth 3B is provided. But its tooth 3
Drive gear 4 in which A is installed at an appropriate position on the scroll pedestal 2
Is provided so as to be movable in the circumferential direction on the surface of the scroll pedestal.

A fan-shaped holder 5 is attached to the circumferential surface of the scroll pedestal 2 with its inner peripheral wall 5A and outer peripheral wall 5B abutting on the inner and outer peripheral wall surfaces 2A of the scroll pedestal 2.
A pressing plate 6 is attached to the rear surface of A and the outer peripheral wall 5B, and the holder 5 is detachably fixed to the rear surface of the scroll pedestal 2 with bolts 7. The holder 5 has scroll teeth 3 on the rear surface.
A pair of right and left are attached to both sides of a scroll nut 9 provided with a rack 8 that meshes with B. A groove 5C is formed on the side of the scroll nut 9 side of the holder 5 toward the center of the main body.

The projections 9A provided on both sides of the scroll nut 9 are fitted into the groove 5C, and the scroll nut 9 is advanced and retracted toward the center of the main body by being guided by the groove 5C. An adjusting screw 1 is provided on the scroll nut 9 toward the center of the main body.
0 is provided, the claw 11 is screwed into the adjusting screw 10, and the adjusting screw 10 is rotated, whereby the claw 11 is advanced and retracted for fine adjustment. Reference numeral 12 in the drawing denotes a scroll nut pressing plate.

[0012]

According to the present invention, the number of pawls can be easily increased or decreased to an odd number and an even number by mounting a pair of left and right holders on the scroll pedestal, and the pawls can be set. The position can be moved to any position on the circumference of the scroll pedestal. Then, when the setting positions of the claws are arbitrarily set, fine adjustments can be made so that the tips of the plurality of claws are positioned on the same circumference by the adjusting screw, and it is possible to cope with precision machining. Further, since the claw itself is provided with the adjusting mechanism, not only the round shape but also the elliptical shape and the distorted shape can be chucked, which is a useful invention.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view showing an embodiment of a scroll chuck of the present invention.

FIG. 2 is a front view showing an embodiment of the scroll chuck of the present invention.

FIG. 3 is a partial perspective view showing an embodiment of the scroll chuck of the present invention.

[Explanation of symbols] 1 main body 2 scroll cradle 3 scroll 3A tooth 3B scroll tooth 5 holder 5A inner peripheral wall 5B outer peripheral wall 8 rack 9 scroll nut 9A convex portion 10 adjusting screw 11 claw

Claims (1)

[Claims] A pair of left and right holders for guiding the scroll nut from both sides are detachably fixed to the scroll pedestal, and a rack provided on the rear surface of the scroll nut is circumferentially mounted on the scroll pedestal. In addition to meshing with the scroll teeth of the moving scroll, convex parts are provided on both sides of the scroll nut, and these convex parts are slidably fitted in grooves formed toward the center of the main body on the scroll nut side of the holder. In addition, the scroll nut is provided with a claw that can be moved forward and backward toward the center of the body by an adjustment screw on the scroll nut.