JPH026993Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a positioning jig that performs positioning using two holes provided in a part to be positioned as guides.

Conventionally, assembling products consisting of multiple parts that require positioning has required careful attention and a large amount of man-hours. Therefore, there has been a need for a working method that allows for easier and more accurate positioning.

[Conventional technology]

The conventional technique will be explained below with reference to FIG.

FIG. 2 is a perspective view showing a wire guide for a printing head as an example of a positioning component and a method for assembling the wire guide.

As shown in the figure, the wire guide 1 is provided with a half-moon-shaped hole (pin guide hole) 1b that guides the printing wire and protrudes from its tip 1a. A cap 2 provided with a hole 2b is mounted so as to match the hole 1b with high precision.

For the above-mentioned high-precision assembly, first, the wire guide 1 is inserted into the cap 2 with high precision, and the wire guide 1 is inserted into its center hole 3.
A fitting member 3 formed to be inserted into a with high accuracy
Attach it to the wire guide 1. Next, the highly precisely formed cap 2 is inserted into the fitting member 3 and attached to the fitting member 3. After that, the screw 4 is inserted into the hole 2c of the cap 2 and screwed into the threaded portion 1c provided on the wire guide 1.

In this way, the pin guide hole 1 of the wire guide 1
In order to accurately position the hole 2b of the cap 2 and the hole 2b of the cap 2, it is necessary to center the center hole 3a of the fitting member 3 and to precisely process the polygonal surface of the cap 2.

[Problem that the invention aims to solve] As explained above, in conventional assembly work, positioning is not performed as a task, and the purpose is automatically achieved using highly precisely machined parts. I was doing it. However, this method not only becomes expensive because each individual component requires high-precision machining, but also has the problem that high-precision positioning cannot be performed due to the accumulation of machining errors in each component.

[Means for solving problems]

The present invention is intended to solve the above problems, and includes a taper pin, a first sliding member that slidably holds the taper pin and has a tapered portion at one end, and a second sliding member inserted into the tapered part in a wedge shape with the tapered part of the member facing each other; a means for pulling the second sliding member in the insertion direction; and a means for pulling the second sliding member in the insertion direction; the second member in the opposite direction
A positioning jig is used which includes a main body member that holds the sliding member slidably in the insertion direction and into which the centering component is inserted.

That is, a positioning jig is used to attach parts that require positioning to each other to perform positioning.

[Effect]

The part to be positioned is supported by a taper pin engaged with the first sliding member, and is accurately set at a position relative to the axis of the second sliding member.

〔Example〕

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

Fig. 1a is a plan view of the positioning jig, Fig. 1b is a sectional view taken along line A-A' in Fig. 1a, and Fig. 1c is a sectional view taken along line B--A in Fig. 1a.
B′ cross-sectional view.

In the figure, 5 is a positioning jig, 6 is a taper pin, 7 is a first sliding member, 8 is a second sliding member, 9 is a coil spring, 10 is a part to be positioned, and 11 is a main body member. be.

As shown in FIGS. 1a and 1b, the positioning jig 5 is
Tapered pin 6 with a tapered tip 6a
a first sliding member 7 that slidably engages the taper pin 6 and has an inclined portion 7a at one end;
A wedge-shaped tip portion formed by arranging the inclined portions 7a of the sliding member 7 symmetrically to face each other, and forming both sides of the tip portion wedge-shaped to be inserted into the inclined portions 7a into symmetrical inclined portions. 8a, and a coil spring 9 that pulls the second sliding member 8 in the insertion direction (direction of arrow C) via the studs 12 and 12'.
The first sliding member 7 is held slidably in the direction in which they face each other (arrow D direction), and the second sliding member 8 is slidably held in the insertion direction, and the positioned part 1
A recess 11a into which the pin 0 is inserted, and an oblong hole 1 bored so that the inserted taper pin 6 can swing.
1b and a main body member 11.

The positioning jig 5 is used by being attached with high precision to a predetermined position of another jig (not shown). A counterpart component to which the positioned component 10 to be positioned by the positioning jig 5 is attached is supported in a predetermined position with high precision by the other jig.

That is, in the example shown in FIG. 2, the part to be positioned 10 corresponds to the cap 2. The wire guide 1 and the positioning jig 5 are positioned and supported relative to each other by the other jig that supports the positioning jig 5.

The positioning method using the positioning jig 5 will be explained below.

First, as shown in FIG. 1b, the part to be positioned 10
is inserted into the recess 11a of the main body member 11. In this example, the part to be positioned 10 has a polygonal shape,
Rough positioning is performed by fitting into the polygonal recess 11a.

Thereafter, as shown in FIG.
C' direction so that the wedge-shaped tip 8a does not come into contact with the inclined part 7a of the first sliding member 7.

Next, as shown in figure c, two taper pins 6
The tapered portion 6a is inserted into the two holes 10a of the part to be positioned 10. At this time, the taper pin diameter needs to be larger than the hole diameter. Thus, the axis of the taper pin 6 and the center of the hole 10a of the positioned component 10 automatically match.

By the above means, the part to be positioned 10 is supported by the taper pin 6 in the recess 11a of the main body member 11 and is in a floating state at approximately a predetermined position.

Next, when you release your hand from the second sliding member 8, the second sliding member 8 moves in the direction of arrow C due to the traction force of the coil spring 9, as shown in FIG. 8a, the inclined portion 7a of the first sliding member 7
is pressed to open the first sliding member 7 outward (in the direction of arrow E).

Thus, the taper pin 6 engaged with the first sliding member 7 and the positioned component 10 supported by the tapered pin 6 similarly move outward, and the second sliding member 8 moves outward. Centering is performed around the wedge-shaped tip 8a, and the initial deviation L shown in FIG. 3C is automatically corrected and set at a predetermined position.

The first sliding member 7 and the second sliding member 8 are arranged with high precision at predetermined positions on the main body member 11, and therefore the part to be positioned 10 can be set in a predetermined position by the above-mentioned means. I can do it.

After the positioning, the part to be positioned 10 is fixed in position by adhesive or other jig (not shown), and then the positioning jig 5 is removed and attached to a mating part (not shown) with screws or the like.

[Effects of the invention] As explained above, by using the positioning jig of the invention for assembling parts, positioning can be performed easily and with high precision, and processing with high precision can be achieved. This eliminates the need to use expensive parts, which has a significant effect on lowering product prices.

[Brief explanation of the drawing]

Fig. 1a is a plan view of the positioning jig of the present invention, Fig. 1b is a sectional view taken along line A-A' in Fig. 1a, Fig. 1c is a sectional view taken along line BB' in Fig. 2a, and Fig. 2 1 is a perspective view showing a method of assembling a wire guide of a printing head as an example of a conventional positioning component. In the figure, 1 is a wire guide, 2 is a cap, 3 is a fitting member, 4 is a screw, 5 is a positioning jig, 6 is a taper pin, 7 is a first sliding member, 7
a is an inclined portion, 8 is a second sliding member, 8a is a wedge-shaped tip, 9 is a coil spring, 10 is a positioned component, 11 is a main body member, and 11a is a recessed portion.

Claims (1)

[Claims for Utility Model Registration] A taper pin whose tip end is formed into a tapered shape, one end surface of which is formed at a constant angle of inclination with respect to the axis, and a through hole into which the taper pin is loosely fitted is formed with a certain dimension from the end surface. A pair of first sliding members are bored at positions and arranged symmetrically on the axis, and the first sliding member is inserted into a V-shaped gap formed by the opposing end surfaces of the first sliding members. a second sliding member formed with a wedge-shaped tip for sliding the first sliding member outward; means for biasing the second sliding member in the insertion direction; and a positioning member positioned on one surface. A recess into which the component is loosely fitted is provided, and the other surface has a groove with an oblong hole into which the pair of first sliding members slide in a straight line, and the second sliding member slides therein. A positioning jig comprising a main body member formed with grooves orthogonal to each other on the center line of the recess.