JP2000079529A - Reverse screw combined jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the size of a jig selectable corresponding to the size of a workpiece, to improve use efficiency of a table, to save labor of operation by enabling operation equivalent to one pitch of a screw pitch by rotating a belt half (1/2 rotation) and to reduce a manufacturing cort with a simple construction. SOLUTION: Workpiece fixing blocks B1, B2 forming a pair by having mutually engaging abutting surfaces are provided with large/small diameter screw parts respectively screwed to a bolt forming an external thread of stepped structure comprising large/small diametric screw parts 1, 2 of mutually reverse screw. Here, a supporting or holding function of a workpiece is provided by abutting/separating the paired workpiece fixing blocks B1, B2 to be freely tightened/loosened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverse screw combination jig for supporting or holding a work at a processing site such as a maker using various machine tools.

[0002]

2. Description of the Related Art Tables of machine tools such as milling machines,
Generally, a vise or the like is used to grip and fix the work on the work table.

[0003]

However, in the above-mentioned conventional example, for example, when a small work is handled, the area occupied by one vise (vise) is smaller than the size of the small work. Therefore, there is a problem that the table area becomes unnecessarily large, the table area that cannot be used is large, and the use efficiency of the table is low.

The present invention has been made by paying attention to the above-mentioned points, and makes it possible to select the size of the jig in accordance with the size of the work, improve the use efficiency of the table, and rotate the bolt half a turn. It is an object of the present invention to provide a reverse screw combination jig which can perform operation for one screw pitch at less than (１ ／ rotation) and can realize labor saving of operation, and has a simple structure and low production cost.

[0005]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) A pair of work fixing blocks having abutment surfaces that engage with each other to form a male screw having a stepped structure composed of a large-diameter screw portion and a small-diameter screw portion of reverse screws. A reverse screw combination characterized by having a large diameter, a small diameter, and a threaded engagement respectively, and a pair of the work fixing blocks making contact with and separating from each other so as to be freely loosened, and having a function of supporting or holding the work. jig.

(2) The screw portion of the bolt has an integral stepped structure, the large-diameter screw portion and the small-diameter screw portion are mutually reverse screws, and the operation for one pitch of the screw pitch can be performed in 1/2 turn or less. The reverse screw combination jig according to the above (1), wherein:

(3) The screw portion of the bolt has a separation type stepped structure, the large-diameter screw portion and the small-diameter screw portion are mutually reverse screws, and the large-diameter screw portion has a concentric inner screw. The reverse screw combination jig according to the above item (1), wherein a small diameter screw portion is screwed into the jig so as to be able to be combined, and an operation for one screw pitch can be performed at a half turn or less.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.

FIG. 1 (a) is a front view and a side view showing the construction of a reverse screw combination jig according to the present invention, and FIG. 1 (b) is a large-diameter screw portion and a small diameter of a reverse screw having an integral stepped structure. FIG. 2C is a side view showing a configuration of a bolt composed of a screw portion, FIG. 2C is a side view showing a configuration of a bolt composed of a large-diameter screw portion and a small-diameter screw portion of a reverse screw having a separated stepped structure, and FIG. Side view showing the configuration in the embodiment when the work is fixed,
FIG. 3 is a side view showing a configuration in an application example to an annular support, FIG. 4 (a) is a side view showing a configuration of another embodiment of a separation type, and FIG. 4 (b) is an example using a reverse screw combination nut. FIG.

Referring to the drawings, reference numerals 1 and 1a denote large-diameter screw portions, 2a denotes a small-diameter screw portion, 3 denotes a rod-shaped portion, 4 denotes a fixing bolt, B1 and B2 denote work fixing blocks, and is an integral type. A work fixing block B1 having an internal thread that can be screwed into the large-diameter screw portion 1 having a stepped structure is screwed to the work fixing block having an internal screw that can be screwed into the small-diameter screw portion 2 having an integrated stepped structure. When the block B2 is screwed in, the surfaces opposing the blocks B1 and B2 forming a pair are configured to come into contact with and separate from each other by the turning action of a bolt so that they can be loosened. As shown in FIG. 1 (a), taking into account the thickness of the work W, the pair of work fixing blocks B1, B2 can be fixed to the base plate 4a with the fixing bolts 4 with an appropriate gap therebetween. It is.

The operation will be described based on the above configuration.

When a workpiece is machined by various machine tools such as a milling machine, a jig for fixing the work is required. In the embodiment of the reverse screw combination jig according to the present invention, the work fixing blocks B1 and B2 are fixed. By freely selecting and manufacturing the size, dimensions, etc. according to the size, shape, dimensions, etc. of the workpiece W to be processed, the required minimum dimensions can be achieved. By using a combination of bolts, the work W can be held between the blocks B1 and B2 forming a pair at a normal half turn (1/2 turn) or less, so that labor efficiency is reduced and work efficiency is improved. Can be enhanced.

Furthermore, in the case of mass-produced products, the jigs holding the work W in desired states at desired intervals on a predetermined table can be efficiently arranged together. For example, in a numerically controlled milling machine, a machining center, or the like, By using a regular array, coordinate measurement is easy, and as a result, production efficiency can be improved.

As shown in FIG. 2, in the case of a work W having a large thickness, an intermediate portion between the large-diameter screw portion 1 and the small-diameter screw portion 2 forming the bolt is formed as a rod-shaped portion 3 having no screw. Can be easily handled.

Further, by using a reverse screw combination in which the bolts have a separated stepped structure, as shown in FIG. 3, when used for an annular support or the like, the large diameter screw portion 1a and the small diameter screw portion 2a are connected. It can be attached by screwing from the opposite side opposite to each other, and can be adjusted loosely to expand the use of the support.

Another embodiment will be described below with reference to the drawings.

FIG. 4 (a) shows another embodiment of the separation type. When the integrated jig shown in the figure is used, the large-diameter screw portion 1a and the small-diameter screw portion 2a of opposite screws are connected to the integrated type jig. The large-diameter screw portion 1a and the small-diameter screw portion 2a are united by screwing and mounting at predetermined positions of the tool, respectively, so that the work gripping portion of the integrated jig can be loosened.

As shown in FIG. 1 (c), the inner screw of the large-diameter screw portion is penetrated so as to be screwed into the large-diameter screw portion. Further, the small-diameter screw portion can be screwed in from either the direction of the distal end portion of the large-diameter screw portion or from either direction.

FIG. 4B shows an example in which a reverse screw combination nut is used. Bolts (a) and (b) of reverse screws are respectively attached to opposite screw mounting portions of the annular support member. In the meantime, by inserting a female screw provided in the form of a reverse screw from both sides in a reverse screw manner, and screwing and mounting in opposite directions from both directions, the reverse screw combination nut is rotated left and right to mutually reverse screw bolts. Through this, the loosening action of the annular support can be made free.

Further, for example, when the gripped portion is a processed screw portion, the pair of blocks B1,
By providing a screw portion that directly engages B2, a function corresponding to the processing accuracy can be provided.

To add a further explanation, the combination of the reverse screw enables to cope with high-precision machining which cannot be performed with a normal vise (vise), and the manufacturing cost is low because the structure is simple. It only needs to be done.

[0023]

According to the present invention, the size of the jig can be selected according to the size of the work, the use efficiency of the table can be improved, and the screw pitch can be controlled by one pitch with less than a half turn of the bolt. It has the effect of saving labor.

[Brief description of the drawings]

1 (a) is a front view and a side view showing the configuration of a reverse screw combination jig according to the present invention, and FIG. 1 (b) is composed of a large-diameter screw portion and a small-diameter screw portion of a reverse screw having an integrated stepped structure; (C) Side view showing the configuration of a bolt composed of a large-diameter screw portion and a small-diameter screw portion of a reciprocal screw having a separated stepped structure.

FIG. 2 is a side view showing a configuration in an embodiment when a thick workpiece is fixed.

FIG. 3 is a side view showing a configuration in an application example to an annular support.

FIG. 4A is a side view showing a configuration of another embodiment of a separation type, and FIG. 4B is a side view showing an example using a reverse screw combination nut.

[Explanation of symbols]

 1, 1a Large-diameter screw portion 2, 2a Small-diameter screw portion 3 Rod-shaped portion 4 Locking bolt 4a Base plate B1, B2 Work fixing block

[Procedure amendment]

[Submission date] July 12, 1999 (1999.7.1)
2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

2. A large-diameter screw portion having a concentric inner screw, and
A separate type stepped structure composed of a serial in screw screwed to the small-diameter screw portion, with an inverse screw and a small-diameter screw portion the large径螺Ko portion together, screwed both to allow coalesced with the step
The large-diameter screw portion of the bolt forming the male screw
For fixing work to be paired by screwing with the diameter screw part
Comprising a block, rotating the bolt to form the pair
The contact surface of the work fixing block comes in contact with and separates
And has a holding function of holding the workpiece by the contact surface.
Conversely screw combination jig characterized by that.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006] The large-diameter screw portion and the small-diameter screw portion of the reverse screw are mutually connected.
The large-diameter screw portion and the small-diameter screw portion of a bolt forming a male screw of this stepped structure with an integrated stepped structure
And a pair of work fixing blocks
And fixing the work forming the pair by rotating the bolt.
The contact surface of the
A reverse screw combination jig having a holding function of holding a work by a contact surface .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Deleted

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

( 2 ) A large-diameter screw portion with a concentric inner screw
If, as separation-type stepped structure consisting of the inner screw and screwed small-diameter screw portion, with an inverse screw and a small-diameter screw portion the large径螺Ko portion together, screwed both to enable coalescence, before
The large diameter screw of a bolt forming a male screw having a stepped structure
Work that is screwed into the part and the small diameter screw part respectively to form a pair
A fixing block, and rotating the bolt to
The contact surface of the workpiece fixing block that forms
Free holding function to hold the work by the contact surface
Conversely screw combination jig further comprising a.

Claims (3)

[Claims] 1. A pair of work fixing blocks each having a contact surface that engages with each other to form a stepped male screw having a stepped structure composed of a large diameter screw portion and a small diameter screw portion of opposite screw. A reverse screw combination jig, which is provided with a large diameter, a small diameter, and a threaded engagement respectively, and the pair of work fixing blocks are brought into contact with and separated from each other so as to be freely loosened and have a work supporting or holding function. Utensils. 2. The screw part of the bolt has an integral stepped structure, and the large-diameter screw part and the small-diameter screw part are mutually reverse screws.
2. The reverse screw combination jig according to claim 1, wherein an operation of one screw pitch can be performed with a rotation of 1/2 or less. 3. The screw portion of the bolt has a separated stepped structure, the large-diameter screw portion and the small-diameter screw portion are mutually opposite screws, and the large-diameter screw portion has a concentric inner screw. 2. The reverse screw combination jig according to claim 1, wherein the small diameter screw portions are screwed together so that they can be combined, and an operation of one screw pitch can be performed with a rotation of 1/2 or less.