JP2003239929A - Attachment/detachment mechanism for jig - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attachment/detachment mechanism for a jig in which attachment and detachment is carried out in a short time, and simplification is realized since no components for fixing the jig is required. <P>SOLUTION: The jig 12 attached with a work is attached to a holder 11 in a single operation. For this purpose, the holder 11 is provided with a protrusion 11a for positioning, and pins 11b and 11c are provided on a portion coupled with the jig 12 so as to protrude in an axial direction with lengths not protruding from an outer circumferential face. In the jig 12, a cylindrical ring 15 is rotatably fitted on a jig body and it is energized in a front direction by an internally fitted coil spring 17. The ring 15 is provided with cutout parts 16a and 16b formed of L-shaped grooves guiding the pins 11b and 11c in response to fore and aft movement of the jig 12 and rotational operation of the ring 15 and locking them in a deepest part. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig attaching / detaching mechanism, and more particularly to a jig attaching / detaching mechanism for facilitating attachment / detachment of a jig used for assembling small parts and the like. .

[0002]

2. Description of the Related Art FIG. 4 shows a conventional jig attaching / detaching mechanism.
A cylindrical positioning key 2 (positioning member) is formed in a diameter direction on one end surface of the cylindrical holder 1.
On the end surface of the holder 1, a jig 3 having a work positioning portion 4 provided on one surface in the depth direction is attached by a bolt 5. The work 6 is fitted into the work positioning portion 4. The holder 1, the jig 3, and the workpiece 6 can be moved in the arrow A direction by the drive pin 8 mounted on the holder 1. In the middle of the direction of arrow A, the jig 3
A holder guide 7 having a hole 7a having a diameter through which the holder can be inserted is installed. The jig device configured by such a detaching mechanism is used in a hose manufacturing facility, an assembly machine for small parts, and the like. The jig 3 is fixed to the holder 1 by the bolts 5 installed from the horizontal direction because the jig 3 (further, the holder 1) needs to be inserted into the hole 7a of the holder guide 7. This is because it is not possible to provide protrusions (bolts, hooks, wedges, etc.) that project from.

For example, when the jig device is used in an assembly machine for small parts, a work 6 having a predetermined shape corresponding to a part to be processed (manufactured) (including final processing) is prepared in advance. Further, a jig 3 having a work positioning portion 4 matching the shape of the mounting portion of the work 6 is prepared in advance. The jig 3 is attached in conformity with the positioning key 2, and the jig 3 is attached using the two bolts 5. Then, the work 6 is mounted on the work positioning portion 4, whereby the assembly of the jig is completed.

By pushing the drive pin 8 in the direction of arrow A, the holder 1 and the jig 3 move in the direction of arrow A, and in the process of the movement, the jig 3 and the holder 1 sequentially pass through the hole 7a of the holder guide 7. Then, thereafter, the work 6 is inserted into or comes into contact with the component to be processed, so that the component to be processed is subjected to predetermined processing (or processing).

[0005]

However, according to the conventional jig attaching / detaching mechanism, the jig 3 is attached and fixed to the holder 1 by bolts (bolts or screws).
In addition to the essential bolts, a tool for attaching and detaching them is required. Since such work is required, bolts may be dropped or lost when the jig is attached or detached, and it is necessary to stop the work or extend the work time. Also, even if there is no drop or loss, it is essential to attach and remove bolts,
There is a problem that it takes a lot of time for replacement.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a jig attaching / detaching mechanism which can be simplified without requiring a component for fixing the jig and can be attached / detached in a short time.

[0007]

According to the present invention, in order to achieve the above object, a work is mounted and has an outer shape that can be inserted into a hole of a guide member, and is attached to a holder in a positioned state. A jig attaching / detaching mechanism, wherein the holder includes one or a plurality of pins projecting in a radial direction of a portion where the jig is interposed and a length that does not project from an outer peripheral surface, and the jig is A cylindrical ring that is rotatably fitted onto the jig body, and is provided near the holder of the ring, and guides each approach of the pin according to the forward and backward movement of the jig and the rotation operation of the ring. Then, there is provided a jig attaching / detaching mechanism, which is provided with a notch portion that locks each of the pins at the innermost portion.

According to this structure, after the holder and the jig are aligned, the pin on the holder side and the cutout portion provided on the ring are aligned, and the pin is fitted into the cutout portion. By operating the ring so that the pin is guided to the deepest part of the notch along the groove of the pin, the pin can be locked at the deepest part of the notch, and the jig is fixed and positioned in the holder. be able to. Therefore, it is possible to replace the jig without using bolts and bolt tightening tools, so that the tools and bolts do not drop or get lost, and there is no time loss for jig replacement, which is required for jig attachment / detachment. The time can be shortened.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a jig attaching / detaching mechanism of the present invention. FIG. 2 shows the details of the jig, (a) is a cross section,
(B) is a plane from diagonally above.

As shown in FIG. 1, the holder 11 and the jig 1
Two are connected so as to have the same center line. Holder 11
On the end surface of each of them, there are vertically provided protrusions 11a (positioning keys) as a positioning member having a cross section of "Sun" shape, and on the outer upper and lower surfaces thereof, a round bar-shaped pin 1 is provided.
1b and 11c are erected. On the other hand, in the jig 12,
A work positioning portion 14 is formed at the front end (end portion near the holder guide 7), and a pair of protrusions 12a and 12b fitted in the recesses of the protrusion 11a are provided on the rear end surface.

As shown in FIGS. 2 (a) and 2 (b), a groove 13 is formed on the outer circumference of the jig 12 so as to make one round in a belt shape. A cylindrical ring 15 is formed so as to cover the groove 13.
Is fitted so as to be slidable in the axial direction. At the front end of this ring 15 (the end near the holder guide 7), a collar 15
a is provided, and this flange 15a is in contact with the outer peripheral surface of the front portion of the groove 13. In addition, the ring 15 has two L
Character-shaped notches 16a and 16b (lower side 16b is not shown) are provided. The cutout portions 16a, 16
By rotating the ring 15, the pin b is formed along the L-shaped opening in the cutouts 16a and 16b.
11c (lower 11c is not shown) is guided, and pin 1
1b and 11c can be guided inside. A coil spring 17 is fitted on the groove 13 hidden by the ring 15, and the coil spring 17 allows the ring 15 to fit.
Since the collar 15a of is pressed toward the front end,
Is always biased toward the front end.

3A to 3E show a procedure for mounting the jig 12 on the holder 11. First, the worker is the jig 1
2 is held by hand, the protrusions 12a and 12b of the jig 12 are fitted into the two recesses of the protrusion 11a of the holder 11, and the holder 11 and the jig 12 are positioned relative to each other. When the jig 12 is pushed into the holder 11 from the direction of the arrow B while maintaining this positioning state, the state of (a) is obtained. In this state, the pins 11b and 11c face the entrances of the cutouts 16a and 16b. Next, the coil spring 17
The ring 15 is strongly pushed in the direction of the arrow B against the elastic force of the pin 11b, and the pins 11b and 11c are inserted into the grooves of the cutout portions 16a and 16b as shown in FIG. Then, the ring 15 is pushed out in the direction of the arrow B, and the pins 11b, 11
c is inserted into the deep portions of the cutout portions 16a and 16b. Then, as shown in (c), when the pins 11b and 11c reach the corners of the notches 16a and 16b,
When the ring 15 is rotated in the direction of arrow C in the drawing, the pins 11b and 11c enter the circumferential grooves (vertical direction in FIG. 3) of the cutouts 16a and 16b. When the ring 15 is rotated as it is, the pins 11b and 11c are notched to the cutout portion 16.
It reaches the ends of a and 16b, and becomes a dead end as shown in (d). Therefore, when the hand (finger) holding the ring 15 is released while maintaining the state of (d), the ring 15 is slightly returned in the D direction by the biasing force of the coil spring 17.
At this time, as shown in (e), the pins 11b and 11c are fitted into the semicircular holes 18 provided at the ends of the notches 16a and 16b, and the rotation of the ring 15 is blocked. At the same time, the jig 12 is fixed (locked) to the holder 11.

When removing the jig 12 from the holder 11, first, the jig 12 is pushed into the notch 16a,
The pins 11b and 11c are pulled out from the semicircular hole 18 of 16b, and the state of (d) is obtained. When the ring 15 is rotated in the arrow E direction while maintaining this state, the state of (c) is obtained. Then, when the jig 12 is pulled out, the state of (b),
After the state of (a), the pins 11b and 11c come out of the notches 16a and 16b, so that the jig 12 can be separated from the holder 11.

With the above construction, the jig 12 can be attached / detached 10 times.
It can be done in about a second. By the way, in the conventional configuration shown in FIG. 4, it takes about 60 seconds since the work including the attachment / detachment of the bolt 5 requires a jig. Therefore, according to the present invention, about 5 pieces are attached / detached (replaced) once.
The time can be reduced to 0 seconds. This time reduction effect increases as the number of exchanges (the number of attachments and detachments) increases.

In the above embodiment, the protrusion 1
1a has a "Sun" shape and the projections 12a and 12b have a prismatic shape, but the present invention is not limited to such a combination of shapes, and the holder 11 and the jig 12 can be accurately positioned. Any shape may be used as long as it can be formed. For example, a combination of a convex portion and a concave portion with respect to a “mouth” shape, a Δ shape, a star shape, an ellipse shape, or a shape with a reduced key height as shown in FIG. 4 may be used.

Further, the notches 16a and 16b are formed in the shape having the L-shaped groove, but the shape is not limited to this and may be, for example, T-shaped or C-shaped. Furthermore, although the number of the protrusions 11a and 11b is two, the number may be one, four, or the like.

[0017]

As is apparent from the above, according to the jig attaching / detaching mechanism of the present invention, the holder is provided with one or a plurality of pins, the jig is provided with a rotatable ring, and the ring is provided with Since the pin is guided and the notch that locks at the innermost part is provided, it is possible to replace the jig without using the bolt and the tool for tightening the bolt. It is possible to eliminate the occurrence of the occurrence, eliminate the time loss for jig replacement, and shorten the time required for attaching and detaching the jig.

[Brief description of drawings]

FIG. 1 is a perspective view showing a jig attaching / detaching mechanism according to the present invention.

2 shows the details of the jig of FIG. 1, (a) is a sectional view,
(B) is a plan view.

FIG. 3 is an explanatory view showing a procedure for mounting the jig on the holder in the jig attaching / detaching mechanism of the present invention.

FIG. 4 is a perspective view showing a conventional jig attaching / detaching mechanism.

[Explanation of symbols]

11 holder 11a, 12a, 12b protrusion 11b, 11c pin 12 jigs 13 groove 14 Work positioning part 15 rings 16a, 16b Notch 17 coil spring

Claims (3)

[Claims] 1. A jig attaching / detaching mechanism, which has an outer shape capable of being inserted into a hole of a guide member while a work is mounted, and is attached to a holder in a positioned state, wherein the holder is the jig. Is provided with one or a plurality of pins protruding in a radial direction of a portion in which it intervenes and a length that does not protrude from the outer peripheral surface, wherein the jig is a cylindrical ring rotatably fitted on the jig body. Provided near the holder of the ring,
A jig characterized by comprising notches for guiding the respective entrances of the pins in accordance with the forward and backward movement of the jig and the rotating operation of the ring and locking the respective pins at the innermost part. Detachable mechanism. 2. The jig according to claim 1, wherein the ring is constantly urged toward the mounting surface of the work by an elastic member fitted on the jig body inside the ring. Attachment / detachment mechanism. 3. The cutout portion is formed by an L-shaped cutout groove having an opening communicating with a rear end edge of the ring in parallel with the axial direction and the innermost portion having a semicircular hole. The jig attaching / detaching mechanism according to claim 1, wherein: