JPH02160434A - Positioning device - Google Patents

Abstract

PURPOSE:To smoothly position the body to be set by enlarging so that a semi- cylindrical engaging body flares the wall of the hole of the body to be set in the positioning device utilized in the manufacture of a printed circuit board for various electronic instruments. CONSTITUTION:Two semi-cylindruical engaging bodies 12a, 12b fitting a guide pin 8 vertically movably to a fixed plate 6, pulling mutually by springs 13, 10, etc., and sliding the side face of the truncated conical part 8b of the guide pin 8 are provided on this device. Moreover, a pad 15 supporting the lower face of the body 14 to be set is provided at the lower end of the engaging bodies 12a, 12b. So that, when the hole 16 of the body 14 to be set is tried to set on the guide pin 8, it is abutted to the stopper 15 of the engaging bodies 12a, 12b, the engaging bodies 12a, 12b are moved downward with sliding the side face of the truncated conical part 8b and yet with enlarging the diameter in the outer peripheral direction and set the body 14 to be set to the stationary plate 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a positioning device used in manufacturing printed wiring boards and the like used in various electronic devices.

2. Description of the Related Art A conventional positioning device of this type has a structure as shown in FIG.

That is, a truncated conical guide pin 2 was embedded and fixed in a fixed plate 1 serving as a base, and this was used as a positioning device.

Problems to be Solved by the Invention However, in such a conventional configuration, as in the case of FIG. If the size becomes larger than Oh for some reason, the object 3 to be set will not be securely fixed to the guide pin 2, causing a problem in accuracy in precision machining.

Furthermore, as in the case of FIG. 8, if the minimum diameter os of the hole 4 of the object 3 becomes smaller than the maximum diameter oh of the truncated conical guide pin 2 for some reason, is set only halfway up the guide pin 2, and is in a state where it floats from the fixed plate 1, which is the base. If this state is further pressed against the base fixed plate 1 side as shown in Fig. 6C using external pressure, the maximum diameter of the truncated conical guide pin 2
As shown in FIG. 7, the hole 4 of the smaller object 3 is crushed by the side surface of the truncated cone-shaped guide pin 2, generating burrs 6, and the powder falling off due to the burrs 6 causes various printing problems. There was a problem with accuracy in precision machining, etc.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a positioning device that can always fix an object parallel to the hole and at the center even if the hole diameter of the object is deviated from a predetermined diameter. .

A means for solving the problem and a technical means of the present invention for solving the above problem is to fix a hollow semi-cylindrical shape that slides so that the central truncated conical side surface always moves parallel to the hole. The structure is such that the parts can be attached.

action The effect of this technical means is as follows.

That is, when an object to be set is attempted to be set on this truncated cone-shaped guide pin, it first hits the hollow semi-cylindrical fixing part and tries to push it down.

Then, this hollow semi-cylindrical fixing part slides on the side surface of the truncated conical guide pin and moves downward while expanding in the outer circumferential direction, pushing it inwardly in parallel with the hole, and fixing the set object. to be fixed. Furthermore, when the object to be set is moved upward from this state and attempted to be removed from the truncated conical guide pin, the hollow semi-cylindrical fixing part moves upward along the side surface of the truncated conical guide pin, and It separates from the hole of the object while shrinking in the inner circumferential direction.

As a result, even if the diameter of the hole of the object to be set varies, the object can always be set in the center without wobbling or cracking when it starts to be set, unlike conventional methods.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings FIGS. 1 to 4.

In FIGS. 1 to 3, reference numeral 6 denotes a fixing plate made of a metal plate, etc., and guide bin attachment parts 7 are provided at necessary locations on this fixing plate 6.
The required number is provided. This guide bottle attachment part 7 has a large diameter recess 7a extending from the bottom surface of the fixed plate 6 to the middle part, and a small diameter guide hole 7b is formed in the upper part of this recess 7B. A recess 7C of intermediate size is formed, and a shallow recess 7d having a maximum diameter is formed above this recess 7c.

A guide pin 8 is incorporated into the guide pin mounting portion 7, and the guide pin 8 has a cylindrical portion 8a with a diameter that fits into the guide hole 7b at the bottom and a truncated conical portion 8b at the top. A spring locking projection 9 is provided at the lower end of the cylindrical portion 8a projecting into the recess 7a, and a coil spring 1o is installed between the ceiling surface of the recess 72L and the spring locking projection 9, and the coil spring 1o is installed as a guide. The pin 8 is urged upward by a certain distance. Further, the lower part of the truncated conical part 8b fits into the recess 7C, and the upper part projects above the fixing plate 6. A retaining protrusion 1 is provided on the upper outer peripheral surface of the truncated conical portion 8b.
1 is formed.

Further, on the outer periphery of the truncated conical portion 8b of the guide pin 8,
Semi-cylindrical fitting bodies 12&, 12b are arranged, and coil springs 13 are provided on both sides of the opposing abutting surfaces of the two fitting bodies 12&, 12b to connect them and to enable expansion and contraction in the radial direction. installed. Moreover, this fitting body 12a.

A stopper 16 that comes into contact with the lower surface of the object to be set 14 is provided on the outer side of the lower end of the fitting body 12! L.

The stopper 15 is dimensioned to fit into the recess 7d of the fixed plate 6 when the stopper 12b moves downward.

The operation of setting and positioning the object 14 with this configuration will be described below.

When trying to set the hole 16 of the object 14 on the truncated conical guide pin 8 as shown in FIG.
1L, hits the stopper 16 of 12b, and the fitting body 12&,
12b slides on the side surface of the truncated conical portion 8b of the guide pin 8 and connects the two fitting bodies 12&, 1 in the outer circumferential direction.
The object 2b is moved downward while enlarging the diameter thereof, and the object 14 to be set is set on the fixed plate 6 serving as the base, as shown in FIG.

Furthermore, when the set object 14 is reset by the guide pin 8, when the set object 14 is moved upward, the fitting body 1
21L, 12b slides on the side surface of the truncated conical portion 8b of the guide pin 8, and shrinks inwardly due to the action of the spring 130, while filling the hole 16 of the set object 14.
The set object 14 is reset from the guide pin 8.

At this time, if the diameter of the hole 16 of the object 140 is smaller than the predetermined diameter, the spring 10 between the fixed plate 6 serving as the base and the guide pin 8 absorbs the sinking of the guide pin 8, and The set object 14 is set on the fixed plate 6 serving as a base.

Effects of the Invention As described above, according to the present invention, the semi-cylindrical fitting body always expands outward to push out the wall of the hole of the object to be set, so that the diameter of the hole does not match the predetermined size. The object to be set can be set smoothly even without a hole, and the semi-cylindrical fitting body does not rub the wall of the hole of the object to be set, which has the effect of preventing the generation of debris and dust. It will be done.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the positioning device of the present invention, Fig. 2 is an enlarged sectional view of the main part of the positioning device of the embodiment of the invention, and Fig. 3 is an exploded view of the main part. 4A and 4B are sectional views showing the operation of the same positioning device, FIG. 6 is a perspective view of the conventional positioning device, FIGS. FIG. 2 is an enlarged sectional view of a main part showing a conventional problem. 6... Fixing plate, 7... Guide bin attachment part, 8... Guide pin, 8b... truncated conical part, 10...・Coil spring, 11...
- Retaining protrusion, 121L, 12b...fitting body,
13... Coil spring, 14...
Object to be set, 15... Stopper, 16 Mountain... Hole. Name of agent: Patent attorney Shigetaka Awano and one other person Kasumi 2
Picture of a parrot picture

Claims (1)

[Claims] A guide pin having a truncated conical portion is attached to a fixed plate so as to be movable up and down, and a plurality of semi-cylindrical fitting bodies are pulled together by a spring or the like and slide on the side surface of the truncated conical portion of the guide pin. The positioning device includes a stopper that supports the lower surface of the object to be set at the lower end of the two fittings.