JPH06182636A - Printed circuit board assembling jig - Google Patents

Abstract

PURPOSE:To provide a printed circuit board assembling jig which can facilitate a screwing work for an electronic part which is inserted in the point of a bolt, the point of which is projected from the back of a circuit board, and screw-fixed by a nut. CONSTITUTION:A bolt 10 is inserted from the back side of an electronic part fitting hole 9 pierced through a printed circuit board 8, a screwed part 6 is put on the bolt point part projected over the surface of the board 8, and a nut is fastened and fixed to the bolt point part projected on the part by an electronic part assembling jig. The jig comprises a plate-like jig main body 2, a positioning guide projection 3 provided on the edge area of the jig main body 2, bolt support holes 4 provided in suitable places of the jig main body 2, and bolt support members 5 fixed in the inner bottom areas of the bolt support holes, wherein the upper end parts of the bolt support members are engaged with the grooves of the bolt head parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a jig for efficiently screwing a component screwed onto a printed circuit board.

[0002]

2. Description of the Related Art There is, for example, a transistor with a radiator as an electronic component fixed on a printed wiring board (hereinafter referred to as a printed circuit board) with a screw, and this kind of screwed electronic component is mounted in a fixing hole formed through the printed circuit board. On the other hand, insert a bolt from the back side of the board, position the electronic component on the board by inserting the hole provided in the electronic component into the screw part of the bolt protruding upward from the hole, and then from the hole of the electronic component. The electronic component is fixed by screwing a nut onto the upper end of the bolt protruding inward. When tightening with the nut, it is necessary to insert the driver tip into the driver groove of the bolt head located on the back side of the board, press the bolt head from the back side of the board to prevent its rotation, and then screw the nut. Moreover, since these operations are manual operations, they are very complicated operations when a large number of screwed electronic components are involved, and improvement of this point has been desired.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a screwing operation for an electronic component or the like which is screwed and fixed by a nut in a state where the bolt having the tip protruding from the back surface of the substrate is inserted into the tip. It is an object of the present invention to provide a printed circuit board assembly jig capable of facilitating the above.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention inserts a bolt from the rear surface side of an electronic component mounting hole formed through a printed circuit board to insert a screw-fastened component at the tip of the bolt projecting on the surface of the circuit board. In a mounting structure of an electronic component, in which a nut is tightened and fixed to a bolt tip end portion that protrudes on the component by wearing, a plate-shaped jig main body and a positioning guide ridge provided on an edge portion of the jig main body And a bolt supporting hole provided at an appropriate position of the jig main body, and a bolt supporting member fixed to an inner bottom portion of the bolt supporting hole, and an upper end portion of the bolt supporting member is fitted in a groove of the bolt head. It is characterized by having a shape.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a perspective view showing the configuration of an embodiment of a printed circuit board assembly jig of the present invention, FIG.
2B is a cross-sectional view of the bolt support hole, and FIG. 2C is a configuration explanatory view of the bolt support member. The jig 1 is a main body 2 made of a plate material such as bakelite or metal, and a corner portion of the main body 2. Alternatively, the positioning guide ridges 3 standing upright at appropriate places on the periphery and the main body 2
And a bolt support member 5 fixed to the bottom portion of the bolt support hole 4. The shape of the jig main body 2 and the shape and position of the ridges 3, as well as the position and number of the bolt support holes 4 are determined by the shape of the printed board 8 on which the screwed electronic component 6 is to be mounted and the electronic component mounting hole 9. It is determined according to the position and the number. That is, the shape of the jig body 2, the shape of the guide ridges 3,
The position is determined according to the shape and size of the substrate 8 to be positioned on the jig body so that the peripheral edge of the substrate 8 can be easily positioned on the jig body 2. Board 8 by guide ridge 3
When the substrate 8 is placed on the jig body 2 by positioning
The position of the bolt support hole 4 is determined so that the bolt support hole 4 and the electronic component mounting hole 9 formed through the substrate 8 are aligned with each other. In addition to the holes 4 shown in the figure, the bolt support holes 4 may be provided in advance in addition to the holes 4 in order to provide versatility with respect to the positions of the electronic component mounting holes and the number of the boards 8 having different numbers.

The bolt supporting member 5 fixed to the bottom of the bolt supporting hole 4 has an upper end 5a having the same shape as the tip of a Phillips screwdriver as shown in FIG. 2 (c). Fit in the positive groove of the part and bolt 10
Is configured so that it can be erected in the support hole 4 (Fig. 2 (a),
(b)).

FIG. 1 shows a state in which the bolt 10 is erected in the support hole 4, and when the substrate 8 is placed on the jig body 2 along the positioning guide ridges 3 in this state, the substrate 8 The tip portion of the bolt 10 is smoothly inserted into the electronic component mounting hole 9 so that the tip portion protrudes above the substrate by a required length. FIG. 3 shows a state in which the screw-fastened component 6 is fixed on the board having the tip of the bolt 10 projected from the electronic component mounting hole 9 by being superimposed on the jig 1, and the component 6 is attached to the projecting bolt tip. After inserting the insertion hole 6a, the nut 11 is screwed onto the tip of the bolt protruding from the insertion hole 6a. At this time, the nut turning tool 12 is used. At the time of screwing by the nut turning tool 12, the substrate 8 is pressed onto the jig body 2 and the groove of the bolt head is pressed against the upper end of the bolt supporting member 5, so that the rotation of the bolt at the time of tightening the nut is prevented, and The property becomes good. When the tightening of all the nuts is completed, the board 8 is removed from the jig.

When the groove on the head of the bolt is a minus groove, the shape of the upper end of the bolt supporting member 5 is of course the shape of the tip of the minus driver. The lower part of the bolt support member 5 is fixed to the bottom of the bolt support hole 4 so as not to slip off, for example, as shown in FIG. 2C, a flange is projected.

Further, in order to ensure the upright state of the bolt in the bolt support hole 4, it is preferable that the hole 4 be formed sufficiently deep and that the diameter be small so that the bolt does not fall. . Alternatively, a tube made of a soft material such as rubber or resin may be additionally provided on the inner wall of the hole 4, and the head of the bolt may be elastically press-fitted into the inner wall of the tube.

[0010]

As described above, according to the present invention, it is possible to facilitate the screwing work of an electronic component or the like which is screwed and fixed by a nut in a state where the bolt having the tip protruding from the back surface of the substrate is inserted into the tip. can do.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of a printed circuit board assembly jig of the present invention.

2A and 2B are cross-sectional views of a bolt support hole, and FIG. 2C is a configuration explanatory view of a bolt support member.

FIG. 3 is an explanatory diagram showing a state in which a screw-fastened component is fixed on a board having a bolt tip portion projected from an electronic-component mounting hole by being superposed on a jig 1.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 jig, 2 main body, 3 positioning guide ridges, 4 support holes (including grooves), 5 bolt support members, 6 screwed electronic components, 8 printed circuit boards, 9 electronic component mounting holes, 1
0 volt

Claims (1)

[Claims] 1. A bolt tip projecting onto a printed circuit board by inserting a bolt from the back side of an electronic component mounting hole formed in the printed circuit board and inserting a screw-fastening component into the bolt tip projecting from the board surface. In a jig for assembling an electronic component in which a nut is tightened and fixed to a portion, a plate-shaped jig main body, a positioning guide ridge provided on an edge of the jig main body, and a jig provided at an appropriate position on the jig main body A printed circuit board comprising a bolt support hole and a bolt support member fixed to an inner bottom portion of the bolt support hole, and an upper end portion of the bolt support member having a shape to be fitted in a groove of the bolt head. Assembly jig.