JPH0146254B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a mounting device for mounting a hollow cylindrical part with a collar into a member having a through-hole formed therein. , b and FIGS. 2a and 2b, a so-called eyelet 1 made of a hollow cylindrical body with a flange is fitted into a through hole of a printed circuit board 2, and is fitted into the hole.

Construction of the conventional example and its problems Conventionally, as shown in FIG. 3A, an eyelet setting device having an anvil 5 integrated with a shaft 4 in order to be equipped with a guide pin 3 in a slidable manner has been used. This device lowers the female shaft 4 as shown in FIG.
, the eyelet 4 is further lowered, the shoot 6 is retracted in the direction of the arrow, and the eyelet 1 is separated from the shoot 6. Then, the anvil 5 is raised toward the through hole of the printed circuit board 2, and the shaft 4 is lowered toward the through hole of the printed circuit board 2, as shown in FIG. 3c. When the guide pin 3 comes into contact with the anvil 5, only the mating shaft 4 is then lowered. Eyelet 1
is pushed into the through hole of the printed circuit board 2 by the female shaft 4, and is sandwiched between the female shaft 4 and the anvil 5,
I can't stand it. However, this device
There was also a problem that when the through hole of the printed circuit board 2 was not accurately centered with respect to the guide pin 3, the eyelet 1 was not inserted smoothly into the through hole of the printed circuit board 2, causing buckling of the eyelet 1. . In particular, when using a thin eyelet or a small eyelet, there is a risk that the eyelet 1 will buckle even if the position of the printed circuit board 2 is slightly shifted.

Purpose of the Invention Therefore, the present invention provides a mounting device for mounting a hollow cylindrical part with a collar such as an eyelet into a through-hole of a member such as a printed circuit board having a through-hole. This was done to solve the above-mentioned conventional problems by allowing smooth insertion into the through hole and protecting the cylindrical component from buckling.

Structure of the Invention According to the present invention, a pair of guide pins are arranged on the same axis so as to face each other on both sides of a member having a through hole bored therein. Then, a hollow cylindrical body part with a flange is removably held on the outer periphery of the tip of one guide pin, and the other guide pin is moved toward the through hole of the member, inserted into this through hole, and penetrated. Make it protrude toward one guide pin side. Thereafter, one guide pin is moved toward the through hole of the member, its tip is brought into contact with the tip of the other guide pin, and the other guide pin is pushed back. As a result, the hollow cylindrical part with a flange is inserted into the through hole of the member integrally with one of the guide pins, and is mounted in the through hole.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described. FIG. 4 shows a printed circuit board and an eyelet fitting device to which the present invention is applied. The printed circuit board 2 is conveyed onto the make-up table 7 using a suitable conveying device and positioned. The eyelets are fed one by one from the ball feeder 8 through the chute 9 to its tip 10. For this purpose, the device has a shaft 11 arranged above the printed circuit board 2 on the make table 7 and an anvil 12 arranged below. The pair of guide pins 13 and 14 are arranged on the same axis on both upper and lower sides of the printed circuit board 2 so as to face each other.

As shown in FIG. 5, the upper guide pin 13 is a stepped pin having a head 15 at its upper end. The female shaft 11 is housed in a cylindrical guide block fixed to a fixed shaft 16, is slidably guided in the vertical direction by the fixed shaft 16 and the guide block 17, and is pressed downward by a spring 18. ing. The guide pin 13 is
It is housed in the female shaft 11 and the fixed shaft 16, is equipped to be slidable in the vertical direction, and is equipped with a spring 19.
is pushed downward by. Fixed shaft 16
The guide block 17 serves to maintain the straightness of the shaft 11 and guide pin 13. The spring 19 is received by a screw block 20 screwed onto the head 15 of the guide pin 13 and the fixed shaft 16, and the head 15 is normally pressed against the fixed shaft 16 by the spring 19.

As shown in FIGS. 6, 7, and 8, the eyelet 1 is attracted by the three suction grooves 21 of the shaft 11, and is detachably held on the outer periphery of the tip of the guide pin 13. The guide pin 13 is located in the lower end recess 2
2, and always protrudes downward from the fitting shaft 11 by a predetermined length. The protruding length of the guide pin 13 is longer than the length of the eyelet 1 by a certain distance H. The suction grooves 21 are formed at angular intervals around the guide pin 13 and communicate with the inside of the fixed shaft 16 through a communication groove 23 in the female shaft 11, a communication port 24 of the guide pin 13, and a communication hole 25. It communicates with the inner bore 26 of the screw block 20. The bore 26 of the screw block 20 is connected to a vacuum pump. Fixed axis 1
6 is supported by an arm 27 on an operating head 28 so as to be movable up and down and pivotable. After rotating the fixed shaft 16 to the tip position of the chute 9, the operating head 28 is raised and lowered to insert the guide pin 13 into the eyelet 1 of the tip portion 10 of the chute 9.
The female shaft 11 has a conical surface at the lower end, and this conical surface fits the eyelet 1, and the suction groove 21 attracts the eyelet 1. Thereby, the eyelet 1 is removably held on the outer periphery of the tip of the guide pin 13. When inserted into the eyelet 1, the guide pin 13 projects a certain distance H below the lower end of the eyelet 1. The outer diameter of the tip of the guide pin 13 is the same as or only slightly smaller than the inner diameter of the eyelet 1, and the eyelet 1 is tightly fitted to the outer periphery of the tip of the guide pin 13. Thereafter, the operating head 28 pivots the fixed shaft 16 to its original position above the printed circuit board 2, and the guide pin 13 returns to its original position while holding the eyelet 1, and is moved against the lower guide pin 14. They are arranged on the same axis so as to face each other.

As shown in FIG. 9, the lower guide pin 14 has a conical surface, that is, a convex portion, at the upper end. and,
As will be described later, when the guide pins 13 and 14 abut each other, the convex portion fits into the recess 22 of the guide pin 13, and the recess 22 and the convex portion keep the guide pins 13 and 14 in a straight line. This prevents dripping and slipping. Furthermore, the lower guide pin 14 has a stopper pin 29 in the center. The guide pin 14 is housed in the anvil 12, is equipped to be slidable in the vertical direction, and is supported by a spring 30.
is pushed upward by. Anvil 1
2 has a conical surface at its upper end, the slope of which is the same as the conical surface of the guide pin 14. stopper pin 29
is fixed to the guide pin 14 and inserted into the elongated hole 31 of the anvil 12 so as to be slidable in the vertical direction,
Normally, it is pressed against the upper end of the elongated hole 31 by the spring 30. The guide pin 14 normally protrudes upward from the anvil 12 by a predetermined length.
As described later, it penetrates through the through hole of the printed circuit board 2,
It can protrude above it, that is, toward the guide pin 13 side. The outer diameter of the tip of the guide pin 14 is substantially the same as the outer diameter of the eyelet 1. Further, the spring 30 is received by an adjusting screw 32 screwed onto the anvil 12, and the guide pin 14 is lowered by a certain distance h against the elasticity of the spring 30 until its lower end contacts the upper end of the adjusting screw 32. Can be done. The elasticity of the spring 30 is smaller than the elasticity of the spring 19 of the upper guide pin 13. The distance h that the guide pin 14 descends can be arbitrarily adjusted using the adjusting screw 32.

Further, in this embodiment, a cylindrical printed circuit board holder 33 is fitted onto the outer peripheral surface of the anvil 12 so as to be slidable in the vertical direction, and is pushed upward by a spring 34. The stopper pin 29 of the guide pin 14 is inserted into the long hole 35 of the board receiver 33 so as to be slidable in the vertical direction, and is normally inserted into the long hole 35 of the board holder 33.
5 is pressed against the stopper pin 29 by a spring 34.

In the eyelet setting device configured as described above, as shown in FIG. 10a, the eye shaft 11 and the upper guide pin 13 face the anvil 12 and the lower guide pin 14 while holding the eyelet 1. ,stand by. When the printed circuit board 2 is placed in place, the anvil 12 is first lifted by a suitable operating mechanism and raised together with the lower guide pins 14 and the board receiver 33. Guide pin 1
4 rises towards the through hole of the substrate 2, is inserted into the through hole of the substrate 2 as shown in FIG. 10b, passes through this, and projects toward the upper guide pin 13. The board receiver 33 rises until it comes into contact with the lower surface of the printed circuit board 2. Thereafter, only the anvil 12 and the guide pin 14 rise slightly against the elasticity of the spring 34, and the stopper pin 29 of the guide pin 14 slides along the elongated hole 35 of the substrate holder 33 and separates upward from its lower end.

Next, the operating head 28 lowers the fixed shaft 16 together with the female shaft 11 and the upper guide pin 13. The guide pin 13 descends toward the through hole of the printed circuit board 2 and abuts against the guide pin 14 on the lower side. At this time, the recess 22 of the upper guide pin 13 is engaged with the conical surface of the lower guide pin 14, and the guide pins 13 and 14 are accurately abutted against each other. The recess 22 functions to keep the guide pins 13 and 14 on the same axis and to prevent slippage between them.

The upper guide pin 13 is pressed by the spring 19 and further lowers while holding the eyelet 1. Since the elasticity of the spring 19 is greater than the elasticity of the spring 30 of the lower guide pin 14, the lower guide pin 14 is attached to the upper guide pin 1.
3, and is pushed down against the elasticity of the spring 30. Upper guide pin 13
is lowered integrally with the female shaft 11. Therefore, the eyelet 1 is kept tightly fitted to the outer periphery of the tip of the upper guide pin 13, and is inserted into the through hole of the printed circuit board 2 integrally with the guide pin 13, as shown in FIG. 10c. be done. Lower guide pin 14
serves to guide the upper guide pin 13 and eyelet 1 into the through hole of the printed circuit board 2. Since the outer diameter of the tip of the guide pin 14 is substantially the same as the outer diameter of the eyelet 1, the eyelet 1 is centered exactly on the through hole of the printed circuit board 2, and is smoothly inserted into the through hole. The upper guide pin 13 is connected to the eyelet 1
acts to protect. Therefore, there is no possibility that the eyelet 1 will buckle.

The lower guide pin 14 moves down a certain distance h against the elasticity of the spring 30, and the lower end of the guide pin 14 contacts the upper end of the adjusting screw 32. The upper end of the guide pin 14 descends to the upper end of the anvil 12, and both conical surfaces are arranged on the same conical surface. The stopper pin 29 of the guide pin 14 slides along the long holes 31 and 35 of the anvil 12 and the substrate receiver 33, and each of the long holes 31 and 35 absorbs the downward movement of the stopper pin 29.

After that, the anvil 12 rises again. The lower guide pin 14 is pushed up by the adjustment screw 32 and rises together with the anvil 12. The upper guide pin 13 is pushed back by the lower guide pin 14 and pushed up against the elasticity of the spring 19. Therefore, as shown in FIG. 10d, the eyelet 1 is sandwiched between the eyelet shaft 11, the lower guide pin 14, and the anvil 12, and is tightened by its conical surface.

When eyelet 1 machining is completed, Fig. 10 e
As shown in , the female shaft 11 rises to its original position and separates from the eyelet 1, and the upper guide pin 13 is pulled out from the eyelet 1. The anvil 12 is lowered to its original position, and the lower guide pin 14 also leaves the eyelet 1.

The above has described a device for attaching and fixing the eyelet 1 to a through hole in a printed circuit board 2, but the present invention can also be applied to a device for attaching a hollow cylindrical part with a collar to a through hole in a member other than a printed circuit board. is also possible.

Effects of the Invention As explained above, according to the present invention, a pair of guide pins 13 and 14 are arranged on the same axis on both sides of the member 2 having a through hole, and the outer periphery of the tip of one guide pin 13 is arranged on the same axis. A hollow cylindrical part 1 with a collar is held. Then, the other guide pin 1
4 is inserted into the through hole of the member 2, passes through it, and protrudes toward one guide pin 13 side. Thereafter, one guide pin 13 moves toward the through hole of the member 2, and its tip abuts the tip of the other guide pin 14,
One guide pin 13 pushes back the other guide pin 14, and the flanged hollow cylindrical part 1 is inserted into the through hole of the member 2 together with the one guide pin 13. Therefore, when the collared hollow cylindrical part 1 is inserted into the through hole of the member 2, each guide pin 1
3 and 14 are in contact with each other, and each guide pin 1
3 and 14 can be kept in a straight line, and the hollow cylindrical part 1 with a collar can be centered with respect to the through hole of the member 2. Therefore, the flanged hollow cylindrical component 1 can be smoothly inserted into the through hole of the member 2. Moreover, the flanged hollow cylindrical component 1 is inserted into the through hole of the member 2 integrally with one of the guide pins 13, and the flanged hollow cylindrical component 1 is protected by the guide pin 13. Therefore, there is no possibility that buckling of the flanged cylindrical body part 1 will occur.

[Brief explanation of drawings]

Figure 1 a, b is a perspective view of the eyelet, Figure 2 a, b
are sectional views showing the state in which the grommets shown in Fig. 1 a, b are fitted into the through holes of the printed circuit board, Fig. 3 a, b,
c is a sectional view showing the operation of a conventional eye device, FIG. 4 is a perspective view showing an embodiment of the present invention, FIG. 5 is a sectional view showing the eye shaft of FIG. 4, and FIG. Enlarged cross-sectional view showing the shape of the tip of the eye shaft and guide pin,
Figure 7 is a sectional view taken along the - line in Figure 5, and Figure 8 is a cross-sectional view of Figure 5.
FIG. 9 is a sectional view showing the anvil shown in FIG. 4, and FIGS. 10 a, b, c, d, and e are sectional views showing the operation of the device shown in FIG. 4. 1... Eyelet, 2... Printed circuit board, 13,1
4...Guide pin.

Claims (1)

[Scope of Claims] 1. A pair of guide pins arranged on the same axis so as to face each other on both sides of a member having a through hole, and a hollow cylindrical body part with a flange is removably attached to the outer periphery of the tip of one of the guide pins. means for holding the other guide pin, an operating mechanism for moving the other guide pin toward a through hole in the member, inserting it into the through hole, passing it through the hole, and protruding toward the one guide pin side; and the one guide pin. The pin is moved toward the through hole of the member, its tip is brought into contact with the tip of the other guide pin, and the other guide pin is pushed back to move the flanged hollow cylindrical part to the one guide pin. A mounting device for a hollow cylindrical body part with a collar, comprising an operating mechanism that is inserted into a through hole of the member integrally with a pin and is mounted in the through hole. 2 A recess is provided at the tip of one guide pin, a convex portion is provided at the tip of the other guide pin that fits into the recess when the guide pins are in contact with each other, and the recess and the convex portion The mounting device according to claim 1, wherein the guide pin is kept in a straight line and prevented from slipping.