JPH0326486A - Chucking mechanism for adjusting bolt - Google Patents

Abstract

PURPOSE:To enable a precise adjusting work without chattering in the rotating direction nor adding such a force as deflecting a work by providing a ring having a wedge effect of collecting a claw group, a spring pushing this ring down and an L type piece supporting the ring against the spring. CONSTITUTION:A chuck mechanism is descended to the position of the head of an adjusting bolt 1 and thereafter an L type piece 5 is removed from a ring 4. The ring 4 is then pushed down by a spring 6 to converge this claw 3. Thereafter the chuck mechanism is rotated 30 deg. each in the clockwise and counterclockwise directions. The direction of the adjusting bolt 1 and hexagonal direction of the notch part of the claw 3 are mated thus to closely fit the claw 3 to the head of the adjusting bolt 1, completely. In this case, even if the dimension of the head of the adjusting bolt 1 is dispersed the error thereof is absorbed by the upper and lower positions of the ring 4 and the head of the adjusting bolt 1 and claw 3 can always be fitted closely, so the chattering in the rotation direction does not exist and a delicate and precise adjusting work can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an adjustment bolt chuck mechanism for a device that automatically performs fine mechanical adjustments.

BACKGROUND OF THE INVENTION In recent years, automatic adjustment devices are required to be faster and more accurate.

An example of a conventional adjustment bolt locking mechanism will be described below with reference to the drawings.

FIG. 3 is a perspective view of a conventional adjustment point chuck mechanism. 1 is a bolt to be adjusted. 10 is the adjusted button/L'
} It is a chuck part that fits with 1. 11 is a spline shaft, and 12 is a spline sleeve shaft that fits into the spline shaft 11. 13 constantly adjusts the chuck part 10/
This is a spring for pushing down in the l/} direction.

To explain the operation of this adjustment bolt chuck mechanism, first, the chuck portion 10 is pressed against the head of the adjustment bolt 1. If the direction of the hexagonal head of the adjustment bolt 1 and the direction of the hexagonal hole of the socket part 10 do not match, the two cannot be fitted together.

Therefore, the space between the spline shaft 11 and the spline sleeve 12 is compressed, and the adjustment port 1 and the chuck part 10 remain in contact without being fitted. Next, when the Nupline sleeve shaft 12 is slowly rotated, when the hexagonal directions of the two sides match, the chuck part 10 is pushed down by the force of the spring 130, and the two pieces fit together.

After that, I will start the adjustment work.

Problems to be Solved by the Invention In the above structure, a gap is required between the hexagonal head of the adjustment bolt and the hexagonal hole of the chuck part.

It is impossible to make delicate adjustments due to the looseness caused by oneself. Also, when trying to fit the adjustment hole A/ } and the adjustment part at high speed, it is necessary to increase the force of the spring, and this force distorts the adjustment hole 1 and the adjustment work itself, making it difficult to make delicate adjustments. There was a problem that became clear when things went awry.

The present invention solves the above-mentioned problems, and aims to provide an adjustment bolt adjustment mechanism that can be fitted in a short time without looseness.

Means for Solving the Problem E The adjustment bolt 1 to the chuck mechanism according to the present invention has a shaft that drives the adjustment bolt l, and a notch that is engaged with the tip of this shaft and fits into the head of the adjustment bolt. A plurality of claws, a ring with a wedge effect that focuses these claws, a spring that presses down this ring, and a plurality of openable and closable rings that support the ring so as to resist this spring force and release the claws. It is equipped with an L-shaped piece.

Function: Due to the above-described structure, the present invention allows the head of the adjustment bolt 1 to be fitted without any clearance and without applying force in the axial direction of the adjustment bolt 1.

EXAMPLE Below, an adjustment bolt chuck mechanism according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a perspective view of an adjustment mechanism according to an embodiment of the present invention.

In the figure, 1 is the adjusted port 1-. 2 is a drive shaft. 3 is a claw having a notch at its tip that fits into the head of the adjustment bolt. The upper ends of these pawls 3 are engaged with the lower ends of the shafts 2 so that they can be opened and closed on the side tiles. 4
is the ring that focuses the aforementioned claws. 6 is an L-shaped piece. 6 is a spring that pushes down the ring 4. 7 is a spring for opening the claw 3.

The operation of the adjustment pole/chuck mechanism constructed as described above will be explained below.

First, in Figure 1, a force is applied to the claws 3 by the springs to push them apart. Further, since the outer periphery is restrained by the ring 4, it is opened approximately evenly.

Although the ring 4 is pressed down by a spring 6 from above, it is fixed at the position shown in the figure because the lower surface is supported by the L-shaped piece 6. In this state, the chuck mechanism is lowered to the position of the head of the adjustment port 1, and then the L-shaped piece 6 is removed from the ring 4.

The ring 4 is pushed down by the spring 6, causing the claws 3 to converge. However, if the hexagonal shape of the head of the adjustment bolt and the hexagonal shape of the notch of the claw do not match, the adjustment bolt will be fixed in an unclosed state as shown in FIG. 2a.

Next, the chuck mechanism is rotated 30' clockwise and counterclockwise. When the hexagonal directions of the notches of the adjustment bolts 1 and 1 are aligned, the pawls 3 are completely brought into close contact with the heads of the adjustment bolts 1 and 1, as shown in FIG. 2b. Thereafter, even if the shaft 2 is rotated for adjustment, the ring restrains the outer circumference of the pawl 3, and no matter how much effort is made to push the pawl 3 open, the wedge effect between the ring 4 and the pawl 3 causes the pawl 3 to will never open. At this time, even if the dimensions of the heads of the adjustment bolts 1-1 vary, the errors will be absorbed by the vertical position of the ring 4, and the heads of the adjustment bolts 1 and 1 and the claws 3 can always be in close contact with each other, so that the rotation There is no play in the direction, allowing for fine and precise adjustment work.

In addition, at this time, no force other than the direction of rotation acts on the adjustment point 1, so the workpiece is not distorted and there is no chance of the adjustment going out of order. Further, these effects may be achieved by the shape of the head of the adjustment bonoleto being a polygon having a triangular shape or more.

Further, if there are two or more claws, the same effect can be obtained.

Effects of the Invention As described above, according to the present invention, a shaft for driving the adjustment bolt 1-, a plurality of pawls each having a notch that is engaged with the tip of the shaft and that fits with the head of the adjustment bolt, By providing a ring with a wedge effect that collects these claws, a spring that pushes down this ring, and an L-shaped piece that supports the ring against the spring, there is no backlash in the rotational direction. ．． This has the excellent effect of allowing precise adjustment work to be performed without applying any force that would distort the workpiece.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an adjustment bolt chuck mechanism according to an embodiment of the present invention, Fig. 2 is a bottom view showing its fitting operation, and Fig. 3 is a perspective view of a conventional adjustment bolt chuck mechanism. It is a diagram. 1...Bonoleto to be adjusted, 2...Drive shaft, 3...Claw, 4...Ring, 6...
...L-shaped piece, 6...spring.

Claims (1)

[Claims] It is engaged with the shaft that drives the adjustment bolt and the tip of this shaft,
It includes a plurality of claws each having a notch at the tip, a ring for converging the claws, a spring that pushes down the ring, and an L-shaped piece that can support the ring against the spring. Adjustable bolt chuck mechanism.