JP3455769B2 - Pin insertion method and pin insertion jig - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pin insertion method for inserting pins having heads of a specific shape into a plurality of holes provided in a substrate by aligning the heads in parallel and a pin insertion treatment used therefor. It is about ingredients.

[0002]

2. Description of the Related Art For example, a main wiring board (MDF) provided in an intermediate portion between a telephone exchange and a subscriber circuit has a multilayer wiring board called a matrix board in which a large number of connection holes are formed in a matrix shape and a specific shape. It is provided with a pin having a head (hereinafter referred to as a connection pin) and a robot for inserting the connection pin into the pin mounting hole.

Here, in the multilayer wiring board, the conductors in the X direction and the conductors in the Y direction are wired in a layer in an insulated manner,
A connecting hole is formed at the intersection of both conductors. On the other hand, the connection pin has a head having a shape having parallel left and right side surfaces, and the pin portion has a connection member having a spring property for connecting the conductor in the X direction and the conductor in the Y direction. Then, the head of the connection pin is gripped by the robot and inserted into the connection hole to connect the line, and the connection pin is released from the pin mounting hole to release the connection.

In such a multilayer wiring board, a plurality of insertion holes are provided in addition to the connection holes, the connection pins are inserted and held in advance in the insertion holes, and the robot is moved when the line is connected to the connection pins. Since it is designed to grip the head of the robot, it is manufactured so that the robot can reliably grip it.
It is necessary to align and insert the connection pin heads in parallel during assembly, but it is difficult to insert multiple connection pins, which are extremely small parts, into the insertion holes at the same time. I used to manually insert the connecting pins into the insertion holes one by one.

[0005]

However, in the conventional manual method, there is a problem that the alignment accuracy of the head of the connecting pin is poor and the inclination is more likely to occur than the allowable range. When the inclination occurs, the robot cannot accurately grasp the head of the connecting pin when connecting the line, and the connecting pin tilts with respect to the insertion hole when pulling out, resulting in damage to the connecting member provided on the connecting pin. Becomes

In addition, when the connecting pin is manually inserted,
In many cases, the connection pin is forced into the insertion hole of the multilayer wiring board while tilted, which damages the connection member of the connection pin, resulting in a defective connection pin being inserted. There is also a problem that the insertion work is inefficient. Therefore, an object of the present invention is to realize a pin insertion method capable of accurately aligning the heads of the pins and inserting the pins into the insertion holes.

Another object of the present invention is to allow the heads of the pins to be accurately aligned and to insert the pins into the insertion holes, and to prevent damage to the connecting member due to forcible insertion. It is to realize a pin insertion jig capable of improving the efficiency of insertion work.

[0008]

Therefore, according to the present invention, a pin having a head having parallel left and right side surfaces is arranged in a plurality of insertion holes provided in a substrate so that each head is aligned in parallel. In the pin insertion method of inserting by inserting the pin into two steps of temporary insertion and main insertion, the pin is partially inserted into the insertion hole of the board by the temporary insertion, and in the main insertion after the temporary insertion, The V-shaped straightening groove provided at the lower end of the main insertion shaft is positioned on the pin so as to face the alignment direction of the head of the pin, and then the main insertion shaft passes through the straightening groove to position the head of the pin. The part is pushed down to insert the remaining part of the pin into the insertion hole.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are front views showing a method of inserting a pin according to the present invention. FIG. 1A shows a state before main insertion, and FIG. 1B shows a state in which the main insertion is completed. 2A and 2B are views showing the structure of the connection pin. FIG. 2A is a perspective view, FIG. 2B is a sectional view taken along the line BB of FIG. 2A, and FIG.
It is a line sectional view.

FIG. 3 is a view showing a temporary insertion state of the connection pin.
The same figure (A) is a plan view, the same figure (B) is a front view, and the same figure (C).
Is a side view. FIG. 4 is a perspective view showing a state in which the connection pins are inserted into the multilayer wiring board. In the figure, reference numeral 1 designates a multilayer wiring board in which a plurality of conductors in the X direction and a conductor in the Y direction, which are not shown, are respectively insulated in a plurality of layers, and a connecting hole (not shown) is formed at the intersection of both conductors. In addition, a plurality of insertion holes 2 for inserting and holding the connection pins mounted in the connection holes are provided along a predetermined edge portion.

Reference numeral 4 denotes a connecting pin, which has a head portion 5 having parallel left and right side surfaces, and a pin portion 6 for connecting the conductor in the X direction and the conductor in the Y direction. Spring-shaped connecting members 7a and 7b are provided, and the lower end of the pin portion 6 is formed in a conical shape to facilitate insertion into the connecting hole 2. Reference numeral 23 is a main insertion shaft, and an inverted V-shaped correction groove 29 is provided at the lower end of the main insertion shaft 23.

Therefore, when the connection pins 4 are inserted into the insertion holes 2 of the multilayer wiring board 1 with the heads 5 aligned in parallel, first, the connection pins 4 are inserted into the insertion holes 2 in the alignment direction. Insert the pin part 6 halfway so that it faces toward. That is, the connection pin 4 is temporarily inserted into each insertion hole 2 as shown in FIG.
In this temporarily inserted state, as shown in FIG. 1A, the connection pin 4 has a state in which the head portion 5 is lifted by the dimension H from the upper surface of the multilayer wiring board 1.

Thereafter, the main insertion shaft 23 with the straightening groove 29 oriented in the alignment direction is positioned on each connecting pin 4, and the straightening groove 2 is formed.
9 so that the two surfaces of the connection pin 4 come into contact with both upper ends of the head 5 of the connection pin 4, the main insertion shaft 23 is pushed down as it is, and the connection pin 4 is pushed until the head 5 contacts the upper surface of the multilayer wiring board 1. The entire part 6 is inserted into the insertion hole 2. In this way, the connection pin 4 is inserted by the dimension H, that is, the main insertion is performed. The main insertion shaft 23 used for the main insertion is used.
Has a reverse V-shaped correction groove 29 provided at the lower end, the head portion 5 of the connecting pin 4 is inclined at an angle of θ in the horizontal direction as shown in FIG. Even if the pin portion 6 of the connecting pin 4 is inserted by the dimension H, the straightening groove 2
A correction force in the rotational direction is exerted by 9 and the inclination angle θ of the head 5 of the connecting pin 4 is surely corrected by this, so that the head 5 of the connecting pin 4 can be aligned in the normal direction.

Next, the pin inserting jig used for inserting the connecting pin 4 will be described. FIG. 5 is a perspective view showing the positional relationship between the multilayer wiring board and the temporary insertion jig. 6A and 6B are views showing the structure of the pin supply case. FIG. 6A is a partial plan view and FIG. 6B is a front view. As shown in this figure, the multilayer wiring board 1 is provided with two rows of insertion holes 2 of rows a and b in a zigzag pattern along two opposing sides, and a plurality of insertion holes 2 are provided at predetermined positions. Two positioning holes 3 are provided.

Reference numeral 8 denotes a temporary insertion jig, and a plurality of positioning posts 9 corresponding to the positioning holes 3 are provided on the lower surface side of the temporary insertion jig 8, and the positioning posts 9 are fitted into the positioning holes 3. By combining them, the repeatability of the position of the temporary insertion jig 8 with respect to the multilayer wiring board 1 can be obtained. Further, the temporary insertion jig 8 is provided with two rectangular case positioning holes 10. When the positioning posts 9 are fitted into the positioning holes 3, each of the case positioning holes 10 has two holes. It is positioned so as to cover the insertion holes 2 of the row.

Reference numeral 11 denotes a pin supply case, which has the same shape as the case positioning hole 10 and has projections 12 projecting from the upper surface of the temporary insertion jig 8 at both ends. This pin supply case 11 is provided with pin accommodating grooves 13 in a zigzag pattern in two rows similar to the insertion holes 2 of the multilayer wiring board 1. The pin accommodating grooves 13 have a pitch Xp in the X direction (column direction). , Y direction (row-to-row direction) pitch Yp is set so as to match the pitch of the insertion holes 2, respectively, and each pin storage groove 13 is formed.
The connection pin 2 is inserted and held in advance in the.

FIG. 7 is a perspective view showing the relationship between the multilayer wiring board and the jig positioning plate. In the figure, reference numeral 14 denotes a jig positioning plate, and like the temporary insertion jig 8, a plurality of positioning posts 15 corresponding to the positioning holes 3 of the multilayer wiring board 1 on the lower surface side.
The positioning post 15 is fitted into the positioning hole 3 so that the positioning accuracy of the position of the jig positioning plate 14 relative to the multilayer wiring board 1 can be obtained.

Further, the jig positioning plate 14 is provided with two rectangular jig operating holes 16, and each of the jig operating holes 16 fits the positioning post 15 into the positioning hole 3. At this time, the multilayer wiring board 1 is positioned so as to cover the two rows of insertion holes 2. Further, the jig positioning plate 14 is provided with two jig positioning holes 17a and 17b corresponding to each row of the two insertion holes 2 for each jig operating hole 16. There is.

FIG. 8 is a view showing the structure of the main insertion jig, FIG. 8A is a front view, FIG. 8B is a side view, and FIG.
FIG. 3 is an enlarged side sectional view showing the structure of the main insertion jig.
In the figure, 18 is a main insertion jig, and this main insertion jig 18
Is a frame and 19, positioning post 20, support shaft 2
1, piece guide rod 22, main insertion shaft 23, spring 24,
Also, the pushing piece 25 is configured as a main component.

The frame 19 has an L-shaped side surface, and a positioning post 20 is provided on the lower surface side of the horizontal portion of the frame 19 so as to correspond to the jig positioning holes 17a and 17b of the jig positioning plate 14. This positioning post 20 is connected to the jig positioning hole 17a or 17 of the jig positioning plate 14.
By fitting in b, the repeatability of the position of the jig positioning plate 14 with respect to the multilayer wiring board 1 and the jig positioning plate 14 can be obtained.

A support shaft 21 is attached to both sides of the upper surface of the vertical portion of the frame 19, and both posts 2
The upper part of 0 is a constricted part 2 having a certain length in the vertical direction.
6 is provided, and the constricted portion 26 is used as the piece guide rod 2
2 are fitted into through holes provided at both ends of the bridge 2, so that the piece guide rod 22 can move within the range L of the constricted portion 26 as shown in FIG.

Further, in the vertical portion of the frame 19, the bottom surface is used as a reference surface and the shaft guide hole 2 perpendicular to the reference surface is formed.
7 are provided in parallel with the same number of insertion holes 2 for one row at the same pitch. The shaft guide hole 27 is formed to have a diameter slightly larger than the diameter of the lower portion of the main insertion shaft 23, and a rotation regulating slit 28 cut downward from the diametrical direction is provided at the upper end of each shaft guide hole 27. The lower part of the main insertion shaft 23 is inserted into each of the shaft guide holes 27 and held with a gap G having a mutual diameter.

The main insertion shaft 23 is formed in a shape having a step portion 23a with the diameter of the lower portion larger than the diameter of the upper portion, and the inverted V-shaped straightening groove 29 is provided at the lower end as described above. ing. Further, rotation restricting pins 30 and 31 are provided in parallel with the straightening groove 29 at an intermediate portion and an upper portion of the main insertion shaft 23. 28, so that the main insertion shaft 23 can move in the vertical direction and cannot rotate in the axial direction.

On the other hand, each pushing piece 25 is formed in a tubular shape having a step portion 25a with a T-shaped side surface, and the lower portion thereof is a piece guide provided in the piece guide rod 22 at the same pitch as the insertion hole 2. It is slidably fitted in the hole 33, and an elongated hole 32 having a predetermined length in the vertical direction is provided on the upper portion of the pushing piece 25. Then, each pushing piece 25 is vertically movably fitted to the upper end of the main insertion shaft 23, and the rotation regulating pin 30 provided on the upper portion of the main insertion shaft 23 is fitted into the long hole 32 to push the pushing piece 25. Piece 25
Is movable in the vertical direction within the range of the elongated hole 32 and is not rotatable around the axis. Further, the spring 24 is provided so as to extend over the pushing piece 25 and the lower end and the step 23a of the main insertion shaft 23. It is mounted on the outer circumference of the main insertion shaft 23.

As a result, the pushing piece 25 has the spring 2
4 always receives an upward biasing force, and in this state, the upper end of the main insertion shaft 23 is accommodated in the pushing piece 25 so as to be located at a position slightly lower than the upper end of the pushing piece 25. The main insertion jig 18 assembled in this way is
When the positioning post 20 is inserted into the jig positioning hole 17a, each main insertion shaft 23 within the range of the jig operating hole 16 is inserted.
Corresponds to the insertion hole of the row a of the multilayer wiring board 1, and when the positioning post 20 is inserted into the jig positioning hole 17b, each main insertion shaft 23 is inserted into the insertion hole 2 of the row b within the range of the jig operation hole 16. Corresponding to, and then insert hole 2
If the connecting pin 4 is correctly inserted in the
The correction groove 29 of No. 3 is set to be parallel to both side surfaces of the connecting pin head 5.

Further, since the piece guide rod 22 can move within the range L of the constricted portion 26 of the support shaft 21, when the piece guide rod 22 is lifted to the upper end of the constricted portion 26, the stepped portion 25a causes The pushing piece 25 is lifted, and the main insertion shaft 23 is further raised via the rotation regulating pin 31 fitted in the elongated hole 32 of the pushing piece 25.

The operation of the pin insertion jig having the above-mentioned structure will be described. First, as shown in FIG. 5, the positioning posts 9 of the temporary insertion jig 8 are fitted into the two positioning holes 3 of the multilayer wiring board 1, and the pins are previously inserted into the case positioning holes 10 of the temporary insertion jig 8. The pin supply case 11 in which the connection pin 4 is housed in the housing groove 13 is set so that the projections 12 provided at both ends thereof are flush with the upper surface of the temporary insertion jig 48.
The connection pin 4 is temporarily inserted into the insertion hole 2 of the multilayer wiring board 1.

FIG. 10 is an explanatory view showing this temporary insertion step.
The same figure (A) is a partially broken front view, and the same figure (B) is a partially broken side view. As described above, when the pin supply case 11 is set in the case positioning hole 10 of the temporary insertion jig 48, the pin portion 6 of each connection pin 4 housed in the pin housing groove 13 of the pin supply case 11 becomes the multilayer wiring board 1. 10A, the head 5 of the connecting pin 4 is pushed down from above with a constant load in this state as shown in FIG. The pin portion 6 is temporarily inserted into the lower insertion hole 2.

In this temporary insertion, the connection pins 4 are inserted into all the insertion holes 2 of the multilayer wiring board 1 up to the middle of the pin portion 6. The connection pins 4 temporarily inserted as described in FIG. 5 is in a state of being floated by the dimension H from the upper surface of the multilayer wiring board 1. After performing the temporary insertion in this manner, the temporary insertion jig 8 is removed from the multilayer wiring board 1 together with the pin supply case 11, and the main insertion step is performed.

In this insertion step, first, the positioning post 15 of the jig positioning plate 14 is inserted into the positioning hole 3 of the multilayer wiring board 1.
Fit. Now, assuming that the connection pin 4 temporarily inserted in the insertion hole 2 in the row a shown in FIG. 5 is to be fully inserted, first, the main insertion jig 1 is inserted into the jig positioning hole 7a of the jig positioning plate 6.
The positioning posts 15 provided on the lower surface side of the frame 19 of No. 8 are fitted to perform relative positioning between each temporarily inserted connection pin 4 and each main insertion shaft 23 of the main insertion jig 18.

When the positioning post 15 is fitted into the jig positioning hole 7a, the piece guide rod 22 is lifted to temporarily lift all the rows of the main insertion shafts 23 through the push-in pieces 25, and then the pieces. When the guide rod 22 is lowered, the main insertion shafts 23 are also lowered accordingly,
Since the straightening groove 29 of each main insertion shaft 23 hits the upper surface of the head 5 of the temporarily inserted connection pin 4 at a certain position, each main insertion shaft 23 stops there, but the piece guide rod 22 is constricted. It goes down to the lower end of the part 26.

In this state, in each main insertion shaft 23, the rotation restricting pin 30 is lifted from the bottom surface of the rotation restricting slit 28, and the step 25 of the pushing piece 25 is also lifted from the upper surface of the piece guide rod 22. Be in shape. Therefore, in this state, when the upper surface of the pushing piece 25 is pushed downward by the pushing rod 34 shown in FIG. 9, the spring 24 arranged between the lower end of the pushing piece 25 and the step portion 23a of the main insertion shaft 23 is interposed. The main insertion shaft 23 is pushed down, and the correction groove 29 of the main insertion shaft 23 further pushes down the head 5 of the connecting pin 4 until the lower surface of the head 5 comes into contact with the upper surface of the multilayer wiring board 1. .

That is, the connection pin 4 is fully inserted.
Similarly, the push bar 34 shown in FIG.
Then, each of the connection pins 4 temporarily inserted into the insertion holes 2 of the row a is inserted one by one by pushing downward one by one in order. All connection pins 4 temporarily inserted in the insertion holes 2 in row a
When the main insertion of the main insertion jig 18 is completed, the main insertion jig 18 is once removed from the jig positioning plate 14, and the positioning post provided on the frame 19 of the main insertion jig 18 is inserted into the jig positioning hole 7b of the jig positioning plate 6. After fitting 15 to perform relative positioning between the connection pins 4 temporarily inserted in the insertion holes 2 of row b and the main insertion shafts 23 of the main insertion jig 18, this is performed in the same manner as described above. The main insertion is performed for each of the connection pins 4 temporarily inserted in the insertion holes 2 of the row b.

The main insertion of the connecting pin 4 is performed as described above. In this main insertion, the head 5 of the connecting pin 4 at the time of temporary insertion is used.
It has already been described that the inclination of the is corrected by the correction groove 29. The main insertion jig 18 is the spring 2
Since the connection pin 4 is pushed through the spring pressure of 4, the spring pressure of the spring 24 can be set to an appropriate level to prevent the insertion of the connection pin 3 by force.

For example, if the spring pressure of the spring 24 is set to such a strength that the normal connecting pin 3 can be easily inserted into the insertion hole 2, the connecting members 7a, 7b provided on the pin portion 6 of the connecting pin 3 will be During temporary insertion, the inner peripheral surface of the insertion hole 2 or the like may be touched and deformed more than the allowable limit, or the connecting members 7a and 7b may be deformed by more than the allowable limit during manufacturing, and the temporary insertion is performed as it is. , This connecting member 7
When the resistance of insertion becomes larger than the normal state due to the deformation of a and 7b, the spring 24 is compressed and the insertion of the connection pin 3 is prevented, and the excessive insertion is prevented.

As shown in FIG. 9, the main insertion shaft 23 is prevented from rotating in the axial direction by the rotation restricting pin 30 parallel to the correction groove 29 and the rotation restricting slit 28 of the frame 19. Since a gap G is set between the insertion shaft 23 and the shaft guide hole 27 of the frame 19, the gap G
Therefore, even if there is an error in the positional accuracy between the main insertion shaft 23 and the temporarily inserted connecting pin 2, if the error is within the gap G, it must be absorbed. Therefore, it is possible to prevent unreasonable insertion due to an error in position accuracy, and the rotation regulating pin 30 and the rotation regulating slit 28 of the frame 19 prevent the main insertion shaft 23 from rotating in the axial direction. It is possible to insert the connection pin 4 in a state where the head 5 is aligned along the direction of the groove 29.

[0037]

As described above, according to the present invention, the step of inserting the pin is made into two steps, that is, the temporary insertion and the main insertion. In the main insertion, after the inverted V-shaped correction groove having the main insertion shaft at the lower end is positioned on the pin so as to face the alignment direction of the head of the pin, the main insertion shaft passes through the correction groove. Since the head part of the pin is pushed down and the remaining part of the pin is inserted into the insertion hole, even if the head part of the pin is inclined at the time of temporary insertion, the head part of the pin is affected by the action of the correction groove. The parts can be straightened in the alignment direction, and the pin heads can be reliably aligned in parallel within the allowable range to insert the pins into the board insertion holes. When pulling out the pin, tilt the pin with respect to the insertion hole. To prevent the connection member provided in the pin can be prevented from being damaged.

Further, in the pin insertion jig according to the present invention, when the main insertion jig having the main insertion shaft is used for the main insertion of the pin, the main insertion shaft is pushed down by the pushing piece via the spring. Therefore, if the spring pressure of the spring is set to a strength that allows a normal pin to be inserted into the insertion hole without difficulty, the connecting member provided on the pin may hit the inner peripheral surface of the insertion hole during temporary insertion and exceed the allowable limit. Even if the insertion resistance becomes larger than the normal state due to the deformation of this connection member due to the insertion of the connection member in the deformed state, or the temporary insertion as it is due to the deformation beyond the allowable limit of the connection member during manufacturing, The compression of the spring prevents the pin from being inserted and prevents the pin from being inserted forcefully.
The effect that it is possible to avoid a situation in which a defective pin in which the connecting member is damaged is inserted is also obtained.

Further, according to the present invention, the pins are inserted into the insertion holes of the board by the temporary insertion jig and the main insertion jig so that the heads of the pins are aligned in parallel within the allowable range and the pins are quickly inserted into the board. Since it can be inserted into the hole, the effect of improving the efficiency of the insertion work can also be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a pin insertion method according to the present invention.

FIG. 2 is a diagram showing a structure of a connection pin.

FIG. 3 is a diagram showing a temporary insertion state of a connection pin.

FIG. 4 is a perspective view showing a state in which connection pins are inserted into a multilayer wiring board.

FIG. 5 is a perspective view showing a positional relationship between a multilayer wiring board and a temporary insertion jig.

FIG. 6 is a diagram showing a structure of a pin supply case.

FIG. 7 is a perspective view showing a relationship between a multilayer wiring board and a jig positioning plate.

FIG. 8 is a diagram showing a structure of a main insertion jig.

FIG. 9 is an enlarged side sectional view showing the structure of the main insertion jig.

FIG. 10 is an explanatory diagram showing a temporary insertion step.

[Explanation of symbols]

1 Multilayer wiring board 2 insertion holes 2 Positioning hole 4 connection pins 5 connection pins 5 heads 6 pin part 7a, 7b connection member 8 Temporary insertion jig 9 Positioning post 10 Case positioning hole 11 pin supply case 14 Jig positioning plate 15 Positioning post 17a, 17b Jig positioning hole 18-piece insertion jig With 19 frames 20 Positioning post 21 Support shaft 22 piece guide rod 23 insertion axes 24 spring 25 push-in pieces 26 Constriction 27 Axis guide hole 28 Rotation restriction slit 29 Straightening groove 30, 31 Rotation restriction pin

Claims (3)

(57) [Claims] 1. A pin insertion method for inserting pins having heads having parallel left and right side surfaces into a plurality of insertion holes provided in a substrate by aligning the heads in parallel and inserting the pins. The two insertion steps are temporary insertion and main insertion, and the pins are partially inserted into the insertion holes of the board by the temporary insertion. In the main insertion after the temporary insertion, the reverse V with the main insertion shaft provided at the lower end is used. After positioning on the pin so that the letter-shaped straightening groove faces the alignment direction of the head of the pin, the main insertion shaft pushes down the head of the pin through the straightening groove to remove the remaining portion of the pin. A pin insertion method, characterized in that a portion is inserted into the insertion hole. 2. A pin insertion jig for inserting pins having heads having parallel left and right side faces into a plurality of insertion holes provided in a substrate by aligning the respective heads in parallel. A plurality of positioning posts that fit into a plurality of positioning holes provided in the board, and a case positioning hole that positions a pin supply case that accommodates the pins in the accommodation groove at the same pitch as the insertion holes, By fitting the post into the positioning hole, the pin of the pin supply case set in the case positioning hole is positioned on the insertion hole of the board, and the temporary insertion jig is put into a state in which temporary insertion is possible, and Having a plurality of positioning posts that fit in the positioning holes of the board and a plurality of jig positioning holes, after the temporary insertion of the pins, the positioning posts are replaced with the positioning posts of the board instead of the temporary insertion jig. By fitting, a jig positioning plate set on the board and a plurality of jig positioning plates that are fitted in the jig positioning holes of the jig positioning plate at the same pitch as the insertion holes of the board are provided. A frame having a positioning post, a main insertion shaft having an inverted V-shaped correction groove at the lower end and vertically inserted into the shaft guide hole, and a piece guide provided with a piece guide hole at the same pitch as the shaft guide hole. A rod, a cylindrical pushing piece whose lower part is inserted into this piece guide hole and which is vertically movably fitted to the upper end of the main insertion shaft, and a step provided on the lower end of each pushing piece and the outer circumference of the main insertion shaft. A spring disposed between the jig positioning plate and the jig positioning hole of the jig positioning plate so that the main insertion shaft is temporarily inserted into the insertion hole of the board. On the pin Is positioned, the pin insertion jig which is characterized by comprising more with the insertion jig pushing down the head of the pin being provisionally inserted by depressing the present insertion axis through said spring by said pushing piece. 3. The pin insertion jig according to claim 2, wherein the diameter of the shaft guide hole provided in the frame of the main insertion jig is made larger than the outer diameter of the main insertion shaft, and the upper portion of the shaft guide hole is provided. A rotation regulating slit is provided, and a rotation regulating pin is provided on the main insertion shaft in parallel with the correction groove at the lower end, and by fitting the rotation regulating pin into the rotation regulating slit, the main insertion shaft is rotated. A pin insertion jig characterized by being prevented from rotating in the circumferential direction and being movable in the radial direction by the difference from the diameter of the shaft guide hole.