JPH0837356A - Grommet terminal and mounting device thereof - Google Patents

Abstract

PURPOSE:To allow improvement of the reliability of mounting on a printed wiring board. CONSTITUTION:A tubular member 13b having a polygonal hole 13a in the inside, a flange 13c formed on a terminal part of the tubular member 13b and a screw 13d formed on the outer periphery of the tubular member 13b are provided for being screwed in until the undersurface of the flange 13c abuts on the upper surface of a printed wiring board 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a female terminal capable of improving the reliability of mounting on a printed wiring board, and a mounting device therefor.

[0002]

2. Description of the Related Art FIG. 7 is a sectional view showing a structure of a conventional female terminal mounted on a printed wiring board, and FIG. 8 is a female terminal mounting apparatus for mounting the female terminal shown in FIG. 7 on a printed wiring board. FIG. 9 is a sectional view showing a state in which an electronic component is mounted on the female terminal shown in FIG. 8. In each drawing, 1 is an insulating substrate, 2 is a conductive pattern printed on the insulating substrate 1, and 3 is a terminal insertion hole (hereinafter referred to as an insertion hole) formed by penetrating the insulating substrate 1 and the conductive pattern 2. .
The printed wiring board 4 is formed by the above 1 to 3.
Reference numeral 5 is a female terminal attached to the insertion hole 4, and the other end of the tubular portion 5b having a flange 5a formed at one end and inserted into the insertion hole 4 is expanded by means described later and comes into contact with the conductive pattern 2. Is being done.

Next, a female terminal mounting device will be described. In FIG. 8, reference numeral 6 denotes an upper die for holding the fitting terminal 5 via the flange 5a, and an insertion bit 6a is formed at one end portion thereof so that the fitting terminal 5 can be inserted into the hole of the fitting terminal 5 by a predetermined length. Reference numeral 7 is a cylinder for driving the upper mold 6, 8 is a split bit arranged so as to face the upper mold 6, and is a cylindrical portion 5b of the fitting terminal 5.
It can be inserted inside. Reference numeral 9 is a cylinder for driving the split bit 8, and 10 is a confirmation device for confirming that the upper die 6 and the split bit 8 are electrically connected.

Next, the operation of mounting the female terminal on the printed wiring board by mounting the female terminal shown in FIG. 8 will be described. As shown, the insulating substrate 1 is inserted into the insertion hole 3 of the printed wiring board 4.
Insert the stopper terminal 5 from the side. Next, the cylinder 7 is driven to lower the upper die 6, and the insertion bit 6a is fitted and the terminal 5 is inserted.
, And the upper die 6 and the fitting terminal 5 are brought into contact with each other. When the cylinder 9 is driven in this state to raise the split bit 8, the rising split bit 8 is inserted into the female terminal 5, and the insert bit 6a is pushed while pushing the end of the female terminal 5 to split. Is raised to the position where it comes into contact with. The contact between the insertion bit 6a and the split bit 8 causes the confirmation device 1
0 operates and recognizes that the fitting terminal 5 is normally attached to the printed wiring board 4, and the upper die 6 and the split bit 8 are returned to their original positions to enable the next work.

As described above, the female terminals 5 are mounted in the insertion holes 3 of the printed wiring board 4. Then, in the next step, the electronic component 11 is mounted on the female terminal 5 of the printed wiring board 4 as shown in FIG. 9, and the leads 11 a of the electronic component 11 are collectively connected by the solder 12.
And the conductive pattern 2 are electrically connected.

[0006]

As described above, in the conventional female terminal, the mounting of the female terminal 5 can be confirmed by the contact between the insertion portion 6a of the upper die 6 and the split bit 8, so that the printed wiring board 4 can be mounted. If the thickness T of the printed wiring board 4 is thin due to a manufacturing error, as shown in FIG. 9, a gap Δt remains between the printed wiring board 4 and the flange 5a of the fitting terminal 5, and the printed wiring board 4 vibrates. Since a shock or a shock is applied to the soldered portion as a stress due to the gap Δt, it may cause a crack, a disconnection, or the like in the soldered portion, and there is a problem that the mounting reliability of the female terminal 5 is deteriorated. .

The present invention has been made in order to solve the above problems, and it is possible to prevent cracks from being generated in the solder connection portion due to vibration or impact, and to improve the reliability of mounting. The purpose of the present invention is to obtain a female terminal and its mounting device.

[0008]

A female terminal according to claim 1 of the present invention is a tubular member having a polygonal hole therein, a flange formed at one end of the tubular member, and an outer periphery of the tubular member. The screw is formed so that the upper surface of the printed wiring board is screwed by the screw until the lower surface of the flange abuts.

The female terminal according to claim 2 of the present invention is a tubular member having a hole inside, a flange formed at one end of the tubular member, a screw formed on the outer periphery of the tubular member, and a flange. Is provided with a cross-shaped notch formed in connection with the hole, and is screwed until the lower surface of the flange comes into contact with the upper surface of the printed wiring board with a screw.

According to a third aspect of the present invention, in the female terminal according to the first aspect or the second aspect, a nut is screwed into a screw portion which is screwed into the printed wiring board and protrudes from the lower surface of the printed wiring board. It was made to be done.

A female terminal mounting device according to a fourth aspect of the present invention is a printed wiring board supporting frame for supporting a printed wiring board, and a tubular shape arranged above the printed wiring board to attract a flange of the female terminal. Vacuum holding means, a pair of light emitting element and light receiving element which emits light from one end side along the upper surface of the printed wiring board and receives light at the other end side, position detecting means for detecting the position of the flange of the female terminal, The driver that is placed through the center of the vacuum holding means and fits into the hole of the fitting terminal to rotate, the torque detector that detects the torque of the driver, and the detected value of the torque detector exceeds the specified value. At this time, it is determined whether or not the rotation of the driver is stopped, and whether the position of the flange of the female terminal detected by the position detection means is set to a predetermined position, and if not, the control device is stopped. It is those with a.

[0012]

According to the first aspect of the present invention, the female terminal engages with the driver through the polygonal hole formed inside, and the lower surface of the flange contacts the upper surface of the printed wiring board when the driver rotates. It is screwed in until it touches.

According to the second aspect of the present invention, the female terminal is engaged with the driver by the cross-shaped notch formed in the flange, and the lower surface of the flange of the printed wiring board is attached to the printed wiring board by the rotation of the driver. It is screwed in until it contacts the top surface.

Further, the female terminal according to claim 3 of the present invention is fixed by screwing a nut to a threaded portion projecting to the lower surface of the printed wiring board according to claim 1 or 2.

The control device for the female terminal mounting device according to the fourth aspect of the present invention stops the rotation of the driver when the detected value of the torque detector exceeds a predetermined value, and
It is determined whether or not the position of the flange of the female terminal detected by the position detection means is set to a predetermined position, and if not, the apparatus is stopped.

[0016]

EXAMPLES Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a top view and a cross-sectional view showing a structure of a female terminal according to Embodiment 1 of the present invention mounted on a printed wiring board, and FIG. 2 is a female terminal mounting the female terminal shown in FIG. 1 on a printed wiring board. Sectional drawing which shows a terminal mounting apparatus, FIG. 3 is FIG.
2 is a cross-sectional view showing a state in which an electronic component is mounted on the female terminal, and FIG. 4 is a flow chart showing the operation of the female mounting apparatus shown in FIG.

In FIG. 1, 1 to 4 are the same as the conventional ones, and therefore their explanations are omitted. Reference numeral 13 denotes a female terminal mounted on the printed wiring board 4. A flange 13c is formed at one end of a tubular member 13b having a hexagonal polygonal hole 13a, and a screw 13d is provided on the outer periphery of the tubular portion 13b. Has been formed. The diameter of the tubular portion 13b is gradually reduced from the flange 13c at a predetermined distance toward the tip.

Next, a mounting terminal mounting device will be described with reference to FIG. In FIG. 2, reference numeral 14 denotes a printed wiring board support frame arranged in the center of a table (not shown), and a support portion 14a having a U-shaped cross section is formed on the upper portion thereof. Reference numeral 15 is an elastic member such as rubber attached to the support portion 14a, on which the printed wiring board 4 is placed. Reference numeral 16 denotes a female terminal holding frame arranged so as to face the printed wiring board support frame 14, and a pair of holes 16a and 16b are formed so as to face each other at an end portion having a U-shaped cross section. Both holes 16a and 16b are arranged at positions displaced from the center of the fitting terminal holding frame 16. 17
Is a light-emitting element disposed near one hole 16a, 18
Is a light receiving element arranged in the vicinity of the other hole 16b, and in the above 17 and 18, position detecting means 19 for detecting the position of the stopper terminal 4 is formed.

A vacuum holding means 20 is arranged in the center of the female terminal holding frame 16 and is formed in a tubular shape with a hollow portion having a predetermined diameter, and holds the flange 13c of the female terminal 13 at the end. It is connected to a vacuum device (not shown) so that it is possible. Reference numeral 21 denotes a polygonal driver having a predetermined length arranged so as to penetrate the vacuum holding means 20 in the axial direction, 22 denotes a rotating device connected to one end of the driver 21, and 23 denotes a rotating torque of the rotating device 22. The torque detector outputs a detection signal when the torque of the rotating device 22 reaches a preset reference value. 24 is a light receiving element 18
The control device connected to the rotating device 22 and the torque detector 23 detects that the flange 13c of the coupling terminal 13 is set to a predetermined position by the position detecting means 19, and the torque detector 23 When the detected value exceeds a predetermined value, the rotation of the driver 21 is stopped via the rotating device 22.

Next, the terminal 13 fitted to the printed wiring board 4 is attached.
The mounting operation for mounting the will be described with reference to FIGS. First, when the printed wiring board 4 is supplied to the movable table and positioned (step S1), the printed wiring board support frame 1 is provided.
4 rises to support the printed wiring board 4 as shown (step S2). Next, the female terminal 13 is inserted from the other end of the driver 21, and the female terminal 13 is sucked and held by the vacuum holding means 20 via the flange 13c (step S3). Then, the fitting terminal holding frame 16 is lowered (step S4), and the fact that the fitting terminal holding frame 16 is lowered to a predetermined position is detected by a detecting means (not shown) (step S5). The stopper terminal 13 is integrally rotated (step S6). The mating terminal 13 is screwed into the insertion hole 3 of the printed wiring board 4 by descending while rotating.
Then, the screwing of the mating terminal 13 is continued until the lower surface of the flange 13c comes into contact with the upper surface of the printed wiring board 4.

The state where the flange 13c of the coupling terminal 13 and the printed wiring board 4 are in contact with each other is detected by the position detecting means 19, that is, the light receiving element 18. The rotational torque of the rotating device 22 when screwing the terminal 13 into the printed wiring board 4 is monitored by the torque detector 23, and a predetermined torque value, that is, the lower surface of the flange 5c is in contact with the upper surface of the printed wiring board 4. When the set value comes into contact (step S7), the detection signal is sent to the control device 24 to stop the driver 19 via the rotation device 22 (step S8).

The control device 24 processes the position detection signal from the light receiving element 19 and the printed wiring board 4 and the terminal 1
If the gap Δt with the flange 13c of No. 3 is equal to or less than a predetermined value, it is determined that the attachment terminal 13 is attached properly, and if the gap Δt is equal to or more than the predetermined value, attachment of the attachment terminal 13 is determined to be defective (step S9). Then, when the position detection of the female terminal 13 and the rotation of the driver 19 are stopped, the female terminal holding frame 16 rises and returns to the original position (step S10).
Prepare for the next attachment of the female terminal 13. The printed wiring board 4 to which the female terminals 13 are normally attached is sent to the next step, and the leads 11a of the electronic component 11 are inserted into the holes 13a of the female terminals 13 as shown in FIG. Connected together with pattern 2.

As described above, according to the first embodiment, the female terminal 13 and the cylindrical member 1 having the polygonal hole 13a therein are provided.
3b, a flange 1 formed at one end of the tubular member 13b
3c, a screw 13d formed on the outer periphery of the tubular portion 13b, and screwed so that the lower surface of the flange 13c abuts on the upper surface of the printed wiring board 4 by the screw 13d.
The female terminal mounting device stops the rotation of the driver 19 when the detected value of the torque detector 23 exceeds a predetermined value, and the female terminal 1 detected by the position detecting means 19
The controller 24 that determines whether or not the position of the flange 13c of No. 3 is set to a predetermined position, and if not, stops the device.
Since the configuration is provided, the female terminal 13 can be reliably mounted on the printed wiring board 4.

Embodiment 2 FIG. FIG. 5 is a top view and a cross-sectional view showing a state in which a female terminal according to the second embodiment of the present invention is mounted on a printed wiring board. In the female terminal 25 according to the second embodiment, a flange 25c is formed on one end of a tubular member 25b having a hole 25a therein, and a screw 25d formed on the outer periphery of the tubular portion 25b and an end of the flange 25c. The cross-shaped notch 25e is formed, and the screw 25d is screwed in until the lower surface of the flange 25c contacts the upper surface of the printed wiring board 4.

The female terminal 25 according to the second embodiment.
Using a screwdriver (not shown) capable of engaging with the cross-shaped notch 25e of the flange 25c, and using the same female terminal mounting device as in the first embodiment, the flange 25c of the female terminal 25.
It is possible to obtain the same effect as that of the first embodiment by screwing in until the lower surface of the above contacts the upper surface of the printed wiring board 4.

Example 3. In the second embodiment, the through hole is formed inside the tubular portion of the female terminal, and the cross-shaped notch is formed at the end of the through hole. However, the cross-shaped groove is formed at the end of the tubular portion. It is possible to obtain the same effect as that of the above-described second embodiment even if the driver having the cross-shaped groove is engaged and the fitting terminal is rotated.

Example 4. 6A and 6B are a top view and a cross-sectional view showing a state in which a female terminal according to the fourth embodiment of the present invention is mounted on a printed wiring board. In the fourth embodiment, for example, the female terminal 13 used in the first embodiment is replaced by the printed wiring board 4
After mounting in the same manner as in Example 1, the end portion of the screw 13d penetrating the printed wiring board 4 is tightened with the nut 26 to obtain the same effect as in the above-described example, and further firmly fix the same. It becomes possible.

Example 5. In Example 4, Example 1
Although the case where the nut 26 is applied to the female terminal 13 used in the above is described, the female terminal 25 used in the second embodiment is mounted on the printed wiring board 4 and then tightened with the nut 26, so that the same as in the fourth embodiment. It is possible to obtain the effect of.

Example 6. Although the position detecting device 19 for detecting the position of the flange 13c of the female terminal 13 is arranged at the end of the female terminal holding frame 16 in the first embodiment, the position detecting device 19 is provided on the printed wiring board supporting frame 14. The position detecting device 1 is provided near the upper surface of the printed wiring board 4 placed.
9 may be arranged to detect the position of the flange 13c of the fitting terminal 13, and the same effect as that of the above embodiment can be obtained.

[0030]

As described above, according to claim 1 of the present invention, the female terminal has a tubular member having a polygonal hole therein, a flange formed at one end of the tubular member, and a tubular member. Since the screw is formed on the outer periphery of the printed wiring board and the lower surface of the flange is screwed into the upper surface of the printed wiring board by the screw, the reliability of mounting on the printed wiring board can be improved.

According to claim 2 of the present invention, the female terminal has a tubular member having a hole inside, a flange formed at one end of the tubular member, and a screw formed on the outer periphery of the tubular member. Since the flange is provided with the cross-shaped notch formed by being connected to the hole, the reliability of mounting on the printed wiring board can be improved.

According to a third aspect of the present invention, in the first or second aspect, the female terminal is provided with a nut screwed with the screw of the tubular portion. Therefore, the printed wiring board is provided. It is possible to further improve the reliability of attachment to the.

According to a fourth aspect of the present invention, the mounting terminal mounting device is a printed wiring board supporting frame for supporting the printed wiring board, and the flange of the mounting terminal is arranged above the printed wiring board. Vacuum holding means, a pair of light emitting element and light receiving element which emits light from one end side along the upper surface of the printed wiring board and receives light at the other end side, position detecting means for detecting the position of the flange of the female terminal, The driver that is placed through the center of the vacuum holding means and fits into the hole of the fitting terminal to rotate, the torque detector that detects the torque of the driver, and the detected value of the torque detector exceeds the specified value. When the rotation of the driver is stopped, it is determined whether the detected position of the flange of the female terminal is set to a predetermined position, and if not, the control device is stopped. of , It is possible to improve the reliability of mounting of the printed wiring board of the eyelet terminal.

[Brief description of drawings]

1A and 1B are a top view and a cross-sectional front view showing a structure of a female terminal according to a first embodiment of the present invention mounted on a printed wiring board.

FIG. 2 is a sectional view showing a female terminal mounting device for mounting the female terminals shown in FIG. 1 on a printed wiring board.

FIG. 3 is a cross-sectional view showing a state in which an electronic component is mounted on the fitting terminal shown in FIG.

FIG. 4 is a flowchart showing a mounting operation of the female terminal by the female terminal mounting device shown in FIG. 2;

5A and 5B are a top view and a cross-sectional front view showing a configuration of a female terminal according to a second embodiment of the present invention mounted on a printed wiring board.

6A and 6B are a top view and a cross-sectional front view showing a configuration of a female terminal according to a third embodiment of the present invention mounted on a printed wiring board.

FIG. 7 is a perspective sectional view showing a state in which a conventional female terminal is mounted on a printed wiring board.

8 is a sectional view showing a female terminal mounting device for mounting the female terminals shown in FIG. 7 on a printed wiring board.

9 is a cross-sectional view showing a state in which an electronic component is mounted on the fitting terminal shown in FIG.

[Explanation of symbols]

1 insulating substrate, 2 conductive pattern, 3 insertion hole, 4 printed wiring board, 5 female terminal, 5a tubular portion, 6 upper die,
6a Insert bit, 7 cylinder, 80% bit, 9
Cylinder, 10 confirmation device, 11 electronic parts, 11a
Lead, 12 solder, 13 fitting terminal, 13a polygonal hole, 13b tubular member (tubular portion), 13c flange, 13d screw, 14 printed wiring board support frame, 14a
Support part, 15 elastic member, 16 fitting terminal support frame,
16a, 16b hole, 17 light emitting element, 18 light receiving element, 19 inspection means, 20 vacuum holding mechanism, 21 driver, 22 rotating device, 23 torque detector, 24 control device, 25 fitting terminal, 25a hole, 25b tubular member (Cylindrical part), 25c flange, 25d screw, 2
5e Cruciform cutout, 26 nuts.

Claims (4)

[Claims] 1. A tubular member having a polygonal hole inside, a flange formed at one end of the tubular member, and a screw formed on the outer periphery of the tubular member, the screw being used to print a printed wiring board. A female terminal characterized in that the upper surface is screwed until the lower surface of the flange comes into contact with the upper surface. 2. A tubular member having a hole inside, a flange formed at one end of the tubular member, a screw formed on the outer periphery of the tubular member, and formed on the upper surface of the flange by being connected to the hole. And a cross-shaped notch formed therein, and the screw is screwed until the lower surface of the flange contacts the upper surface of the printed wiring board by the screw. 3. The female terminal according to claim 1 or 2, wherein a screw is screwed into the printed wiring board, and a nut is screwed to a screw portion protruding to the lower surface of the printed wiring board. 4. A printed wiring board supporting frame for supporting the printed wiring board, a cylindrical vacuum holding means arranged above the printed wiring board to adsorb the flange of the fitting terminal, and along the upper surface of the printed wiring board. It consists of a pair of light emitting element and light receiving element that emits light from one end side and receives the light at the other end side, the position detecting means for detecting the position of the flange of the female terminal, and the central portion of the vacuum holding means. A driver that is placed and rotates by fitting in the hole of the above-mentioned fitting terminal, a torque detector that detects the rotation torque of the driver, and stops the rotation of the driver when the detected value of the torque detector exceeds a predetermined value. And determining whether or not the position of the flange of the female terminal detected by the position detecting means is set to a predetermined position, and in the case of no, a control device for stopping the device is provided. And a female terminal mounting device.