JPS646185Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a jig for machining a workpiece fixed to a milling machine, and particularly relates to the structure of a jack for supporting the workpiece on the jig.

When processing a workpiece with a machine tool, the workpiece is generally fixed on a workbench with a jig.

In order to perform high-precision machining, it is necessary to fix the workpiece accurately and reliably, and it is especially difficult to fix the workpiece when the surface to be fixed is uneven. There is a demand for a jig that satisfies the above requirements and has good operability.

[Conventional technology]

The conventional technology will be explained below with reference to FIGS. 2 and 3.

Figure 2a is a plan view of the jig, Figure 2b is A in Figure 2a.
-A' enlarged cross-sectional view, Figure c is a B-B' cross-sectional view of Figure a, Figure 3 a is a side cross-sectional view showing an example of the jack,
Figure b is a side sectional view showing another example of the jack.

As shown in FIGS. 2a and 2b, the jig 1 is assembled on a base 2, and the main clamp member 3 is fixed to the base 2 with a plurality of screws 5.

The secondary clamp member 4 is the main clamp member 3
Shaft member 6 provided perpendicular to the longitudinal direction of
The shaft member 6 is loosely fitted into the main clamp member 3 and the secondary clamp member 4, and is slidable.

A dowel pin 7 is provided on a portion 6a of the shaft member 6 that protrudes from the main clamp member 3 to prevent it from being pulled out. On the other hand, a portion 6b of the shaft member 6 that protrudes from the subordinate clamp member 4 is threaded, and the clamp lever 8 is screwed into the portion 6b.

As shown in Figure c, a support member 10 is provided between the main clamp member 3 and the secondary clamp member 4 to support both ends 9a and 9b of the workpiece 9, which are indicated by two-dot chain lines. , serves to support the workpiece 9 on the jig 1 with a predetermined dimension.

A jack 11 is provided between the support members 10 in order to prevent the workpiece 9 from deforming due to pressure applied from a tool during machining.

The jack 11 supports at least one part of the intermediate part of the workpiece 9, and in FIG. 2c, it supports two parts.

When fixing the workpiece 9 to the jig 1 having such a configuration, first, as shown in FIGS. Rotate lever 8.

A coil spring 12 is interposed between the main clamp member 3 and the secondary clamp member 4, and therefore, by rotating the clamp lever 8 in the opening direction, the secondary clamp member is automatically connected to the clamp member 3. 4 rooms are now open.

When such a state is reached, both ends 9a and 9b of the workpiece 9 are placed on the support member 10 and inserted between the opened main clamp member 3 and the subordinate clamp member 4, as shown in FIG.

After that, the clamp lever 8 is rotated in the opposite direction to close both clamps and clamp the workpiece 9.

After the above-mentioned fixation is completed, the jack 11 is operated to fix the support member 13 in contact with the workpiece 9.

Fixing of the workpiece 9 to the jig 1 is completed in the above manner.

The structure of the jack 11 will be explained below with reference to FIG.

The jack 11a shown in FIG. 3a is of a screw type.

Support member 13a that abuts and supports the workpiece 9
and a sheath-shaped support member 14a that holds the support member 13a and is erected on the base 2 of the jig.

The support member 13a has a bolt-like shape,
It consists of a contact portion 13aa and a threaded portion 13ab.

On the other hand, the sheath-like support member 14a has a female thread 14aa threaded on its central axis that engages with the threaded portion 13ab of the support member 13a.
By rotating the support member 13a screwed into the support member 4a, the contact portion 13aa can be moved up and down as shown by the arrow C-D.

With such a structure, the workpiece 9 is supported on the jig by rotating the support member 13a until it abuts on the surface of the workpiece 9.

Next, a jack having another structure shown in FIG. 2B will be explained.

The jack 11b of this structure is of a sliding type.

That is, it is composed of a support member 13b that abuts and supports the workpiece 9, and a sheath-shaped support member 14b that holds the support member 13b and is erected on the base 2 of the jig.

The support member 13b has a bolt-like shape and includes a contact portion 13ba and a slide portion 13bb.

On the other hand, the sheath-like support member 14b has a slide hole 14ba formed in its central axis to slidably engage with the slide portion 13bb of the support member 13b.

Further, a coil spring 15 is inserted into the slide hole 14ba, and the slide portion 1 of the support member 13b is inserted into the slide hole 14ba.
3bb is pressed, and the support member 13b is made to protrude in the direction of arrow C.

Further, a screw member 17 provided for pressing and fixing the slide portion 13bb of the support member 13b in the orthogonal direction is screwed onto the side portion of the sheath-like support member 14b, and the knob portion 17a of the screw member 17 is rotated. By doing so, it is fixed to the sheath-like support member 14b.

Thus, the support member 13b is attached to the sheath-shaped support body 14 in advance.
b (in the direction of arrow D) and set with the screw member 17. After the fixation of the workpiece 9 by the clamp is completed, when the screw member 17 is released, the support member 13b is moved by the coil spring 15. It protrudes depending on the pressing force of and comes into contact with the surface of the workpiece 9.
When such a state is reached, the screw member 17 is rotated in the opposite direction to fix the support member 13b to the sheath-like support member 14b, and the support of the workpiece 9 to the jig is completed.

[Problem that the invention attempts to solve]

As explained above, to support a workpiece using a jack, the screw provided on the support member is used to rotate the workpiece and bring it into contact with the surface of the workpiece, or the sheath-like support member is used to support the workpiece against spring pressure. It was necessary to release the fixation of the support member which was inserted and fixed by the screw member and bring it into contact with the surface of the workpiece.

The former method is complicated and inefficient because the screws are rotated by visual inspection, and the latter method has good workability, but on the other hand, when the support member that has been inserted into the sheath-shaped support member is released, the workpiece is There were problems such as collision between the object and the support member and damage to the workpiece due to the impact force.

[Means for solving problems]

The above problem can be solved by providing a ball member biased by a spring on the pressing part of the screw member which presses the sliding part of the supporting member in an orthogonal direction and fixes it to the sheath-shaped supporting member. In addition, in order to adjust the pressing force of the spring member that presses the support member, the present jig jack is provided with a press member that presses the spring member that is adjustable on the sheath-like support member. It will be resolved.

[Effect]

An appropriate protrusion force for the support member to protrude from the sheath-like support member can be obtained by adjusting the pressing force of the spring member that presses the support member.

On the other hand, when the screw member is loosened and the support member fitted into the sheath-like support member is released from the initial state, a ball member that is biased by a spring and can rotate freely is provided on the pressing part of the screw member against the support member, and the spring force is applied. Due to the fact that the pressure is applied through the spherical member, the pressure is not released all at once during the release, and the pressing force is gradually reduced due to the rotatable ball member that is biased by the spring.
Coupled with the rotational movement of the ball member, the support member protrudes smoothly.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a side sectional view of a jig jack according to the present invention.

In the figure, 16 is a jack, 18 is a sheath-shaped support member, 19 is a pressing member, 20 is a screw member, 21 is a ball member, 22 is a case, and 23 is a coil spring. Identical parts are designated by the same reference numerals throughout the figures.

The jack 16 of the present invention has a sliding structure.

That is, it is composed of a support member 13b that abuts and supports the workpiece 9, and a sheath-like support member 18 that holds the support member 13b and stands on the base 2 of the jig 1.

The support member 13b includes a contact portion 13ba and a slide portion 13bb.

On the other hand, the sheath-shaped support member 18 has a slide hole 18a formed in its central axis to slidably engage with the slide portion 13bb of the support member 13b.

Further, a coil spring 15 is inserted into the slide hole 18a, and the slide portion 13 of the support member 13b is inserted into the slide hole 18a.
The end portion of bb is pressed to make the support member 13b protrude in the direction of arrow C.

Note that a threaded portion 18b is provided at the bottom of the sheath-like support member 18.
By moving the pressing member 19 screwed into the threaded portion 18b in the vertical direction, it is possible to adjust the pressing force against the support member 13b via the coil spring 15.

Further, a screw member 20 provided for pressing the support member 13b in the orthogonal direction and fixing it to the sheath-like support member 18 is screwed onto the side of the sheath-like support member 18, and a screw member 20 is screwed into the side portion of the sheath-like support member 18. By rotating the portion 20a, the slide portion 13bb is pressed, and the support member 1
3b is fixed.

At this time, the threaded portion 20b of the screw member 20 has a double thread as shown in the figure, and the outer thread 20ba
is screwed to the sheath-shaped support member 18, and the inner screw 20bb screws together a case 22 that integrally houses a ball member 21 and a coil spring 23 that presses the ball member 21 so as to protrude from the tip. are doing.

Therefore, the adjustment of the pressing force of the ball member 21 against the sliding portion 13bb is performed by adjusting the pressing force of the ball member 21 against the sliding portion 13bb.
This can be achieved by rotating and moving it left and right in the diagram.

Note that the portion of the slide portion 13bb that comes into contact with the ball member 21 of the support member 13b is chamfered 13 as shown in the figure.
bc to ensure contact.

Thus, the support member 13b is attached to the sheath-like support body 18 in advance.
The screw member 20 is pressed in against the spring pressure of the coil spring 15 (in the direction of arrow D) and fixed with the screw member 20, and after the fixation of the workpiece 9 using the clamp is completed as explained in the conventional technique, the screw is screwed. When the fixation by the member 20 is released, the support member 13b is moved by the coil spring 15.
It protrudes depending on the pressing force of and comes into contact with the surface of the workpiece 9. When such a state is reached, the screw member 20 is rotated in the opposite direction and the support member 13b is attached to the sheath-like support member 1.
8, and the workpiece 9 is supported on the jig.

In this case, since the spring pressure on the support member 13b can be adjusted by adjusting the pressing member 19, an appropriate pressing force can be applied to the workpiece 9, and the threaded portion 20b of the screw member 20 can be adjusted. Since the pressing force on the supporting member 13b can be gradually released by the pressing force of the ball member 21 itself provided at the tip pressing part, the supporting member 13b does not gradually protrude and collide with the workpiece. Now I can touch it quietly without any noise.

After that, the screw member 20 tightens the support member 13b with a force greater than the pressing force of the ball member 21,
The support member 13b is securely fixed by bringing the tip of the threaded portion 20b into contact with the slide portion 13bc.

[Effect of idea]

As explained above, by applying the jig jack of the present invention to the jig, it is possible to easily fix the workpiece to the jig and without applying impact force to the workpiece. Summer.

[Brief explanation of the drawing]

Figure 1 is a side cross-sectional view of the jig jack according to the present invention, Figure 2 a is a plan view of the jig, and Figure 2 b is the same figure a.
Figure 2c is an enlarged cross-sectional view taken along line A-A' of Figure 2c.
B' sectional view, FIG. 3a is a side sectional view showing one example of the jack, and FIG. 3b is a side sectional view showing another example of the jack. In the figure, 9 is a workpiece, 15 and 23 are coil springs, 16 is a jack, 18 is a sheath-like support member,
19 is a pressing member, 20 is a screw member, 21 is a ball member, and 22 is a case.

Claims (1)

[Scope of utility model registration request] a support member that supports a workpiece; a sheath-like support member that is set upright on a jig and has a drilled hole that slidably holds the support member; and an end of the support member that is provided in the drilled hole. A jig jack comprising a spring member that presses a portion of the sheath-shaped support member, and a screw member that is screwed onto a side portion of the sheath-like support member and presses the support member in an orthogonal direction, A jack for a jig, characterized in that a member is provided that is biased by a spring, and the spring pressure of the spring member is adjustable.