JPH0548960B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a pin insertion device used when manufacturing a board for mounting electronic components, called a pin grid array, which has a large number of conductor pins. In particular, the present invention relates to a pin insertion device for automatically inserting conductor pins into pin insertion holes formed in a pallet corresponding to a board for mounting electronic components.

(Prior Art) In the case of an electronic component mounting board called a pin grid array having a large number of conductor pins, a conductive circuit formed on the board side and a board on which the electronic component mounting board is mounted ( In order to ensure continuity with the motherboard (usually called the motherboard), multiple conductor pins are inserted or fixed onto this type of electronic component mounting board, and the electronic components are mounted using these conductor pins. The board is designed to provide electrical continuity between the board and the motherboard. (See Figure 7) In recent years, in the case of such electronic component mounting boards, the electronic components mounted on them have been becoming smaller, and there has been a strong desire to reduce the overall size after mounting. For these reasons, the shape of the conductor pins themselves used in substrates for mounting electronic components has become smaller and smaller in recent years. Moreover, even if the conductor pins are small, they need to be securely attached to the electronic component mounting board, so their shapes are complicated as shown in Figures 5 and 6. It's becoming more and more common. The actual size of the conductor pin 70 shown in these figures is that the diameter of the base is about 0.5 mm and the length is about several mm.
It has a complicated shape with a flange 71 for reliable positioning and support for the substrate. For example, the conductor pin 70 with such a small and complicated shape is
Approximately 50 pieces must be installed.

The conductor pin 7 is small and has a complicated shape.
In order to attach about 20 to 50 conductor pins 70 to a small board, it is necessary to prepare these conductor pins 70 by arranging them in a predetermined state in advance using a special pallet or the like. In the past, most of this preparation was done by hand. However, manually preparing a large number of small conductor pins 70 in a predetermined arrangement has the inconvenience of extremely low work efficiency. Since there are cases where objects are accidentally thrown out of the pallet or bent, various attempts have been made to automatically do this by mechanical means.

As a means for automatically arranging the conductor pins 70, there is an automatic pin insertion method as disclosed in Japanese Patent Publication No. 53-9714, for example. That is, the method includes the steps of "introducing an elongated object onto a carrier having a plurality of apertures, and vibrating the carrier to disturb the object and facilitate its introduction into the apertures in the carrier. the object into the aperture by creating a pressure difference between the step and the upper and lower parts of the aperture, introducing gas into the upper part of the aperture and drawing the object into the aperture. and periodically reducing the pressure difference to reduce the flow of gas to the top of the aperture, cooperating with the vibration of the carrier to release the clutter. Although this method can achieve a certain degree of inserting the conductor pin into the desired location, the properties of the gas have not been sufficiently studied, and this method cannot be applied. In the case of such devices, the insertion speed (efficiency) of conductor pins, the removal of conductor pins that do not fit into the pallet in the correct condition, etc. have not been perfected.

It is considered that the shape and properties of the above-mentioned object (hereinafter referred to as a conductor pin) are not taken into consideration, and that the conductor pin cannot be handled optimally.

There are still problems like this.

In other words, since gas is a fluid, it takes a certain amount of time to reach a steady state of constant pressure unless some other force is applied. If we apply this to a device that adopts the insertion method as shown in the above-mentioned Japanese Patent Publication No. 53-9714, we will find that
It takes a considerable amount of time to recover from a decompressed state using atmospheric pressure, and if you want to shorten this decompression time, you must use a fairly powerful decompression device. Furthermore, even when a fairly powerful pressure reducing device is used to create a predetermined reduced pressure state, it takes time for the reduced pressure to reach a steady state. Furthermore, if you try to repeatedly create the above depressurized state and atmosphere open state within a very short period of time,
Naturally, certain limits arise depending on the nature of the gas used. In other words, there is a limit to the efficiency of the conductor pin insertion work.

Further, as described above, the conductor pin is very small and has a complicated shape, so it is easily deformed. Therefore, handling of such conductor pins requires considerable care so as not to deform the conductor pins. This is because deformed conductor pins not only cannot be inserted into the holes of the carrier (pallet), but even if they can be fixed to the board, the position will not match and the board itself will be considered a defective product. .

Examining how the above-mentioned conventional technology handles conductor pins having such properties, it is found that in the 23rd line of the right column on page 5 of the above-mentioned Japanese Patent Publication No. 53-9714, there is a description of "excessive The object removal device 190 is a frame 192
As it moves toward the right in FIG. The object removal frame 192 is held at the rightmost position where it does not prevent the mask 202 from descending. ” There is a statement to that effect. What can be understood from this description is that
In order to reuse the excess conductor pins, the object removal frame 192 pushes the excess conductor pins to a predetermined position and collects them again. If you push it away, the force applied at that time deforms the conductor pin and makes it more likely to be damaged.
Furthermore, conductor pins used for electronic component mounting boards are usually surface-treated (for example, soldered).
The conductor pin is easily scratched when subjected to long vibrations by a vibrating device, etc., and oxidation progresses easily when exposed to air. In the automatic pin insertion method shown, there is no specific idea from this point of view.

The inventors of the present invention have studied the above-mentioned conventional techniques, etc., and have conducted intensive research to solve the problems. In order to increase the efficiency of conductor pin insertion and to prevent damage to conductor pins, it is not appropriate to collect surplus conductor pins and use them again.
The present invention was completed based on the new knowledge that it is better to consume the supplied conductor pins as quickly as possible with a minimum supply amount.

(Problems to be Solved by the Invention) The present invention has been made based on the above-mentioned circumstances, and the problem to be solved is the inefficiency of the conductor pin insertion work in conventional pin insertion devices. This is damage or deformation of the pin itself.

The purpose of the present invention is, of course, to be able to perform the pin insertion work automatically, but also to actively create a pressure change for inserting the conductor pin, so that the conductor pin insertion work can be performed automatically. An object of the present invention is to provide a pin insertion device in which the conductor pins are quickly consumed in the minimum supply amount, so that the conductor pins are hardly damaged or deformed.

(Means for Solving the Problems) The means taken by the present invention to solve the above problems will be explained with reference to FIGS. 1 to 5 corresponding to the embodiments. an airtight box 10 which is connected to the base 11 and is arranged to be able to vibrate with respect to the base 11, and which houses a pallet 60 for inserting the conductor pin 70;
, a pallet placement table 20 having an opening 21 disposed within the airtight box 10 and communicating with the pin insertion hole 63 of the pallet 60, and a fixing means 30 for fixing the pallet placement table 20. Pin insertion hole 6 of pallet 60 on stand 20
In the pin insertion device for inserting the conductor pin 70 into the pallet placement table 3, the suction device 4 continuously sucks the gas in the airtight box 10 located below the pallet placement table 20.
0 to the airtight box 10, and a high pressure gas supply device 80 that intermittently supplies high pressure gas to the airtight box 10 side located below the pallet placement table 20, and connects the airtight box 10 to the base 11. A rocking device 50 is used to rock the airtight box 10 and the base 1.
1. A pin insertion device 100 characterized in that it is provided between 1 and 2. ”.

That is, this pin insertion device 100 has a plurality of pallets 60 fixedly supported on the pallet placement table 20 which is vibrated together with the airtight box 10 by the vibration device 13. The conductor pins 70 are automatically inserted into the respective pin insertion holes 63.
When inserting the conductor pin 70, a pressure change is applied to the pallet 60 on the pallet placement table 20 using the suction device 40 and The pin insertion holes 63 of each pallet 60 are formed actively by the cooperative operation of the high-pressure gas supply device 80.
This pin insertion device 100 is designed to insert conductor pins 70 into each of the pins.

Further, in this pin insertion device 100, a swinging device for swinging the airtight box 10 with respect to the base 11 is provided between the airtight box 10 and the base 11, so that the pin insertion device 100 can be placed inside the airtight box 10. For example, by swinging the entire pallet placement table 20 left and right with respect to a vertical plane, the pallet 60 can be placed.
The conductor pins 70 are made to flow on the top surface of the pallet 60 by swinging, so that the conductor pins 70 are evenly distributed in all the pin insertion holes 63 on the pallet 60. The conductor pin 70 can be surely inserted into the hole 63.

(Aspects of operation and use of the invention) By adopting the above-mentioned means, the present invention has the following effects.

First, when this pin insertion device 100 is used, for example, the main pallet 61 shown in FIG.
After arranging the pallets 60 (in this embodiment, a plurality of pallets) composed of the pallets and the sub-pallets 62 on the pallet placement table 20 in the airtight box 10,
These pallets 60 are fixed on the pallet placement table 20 by the fixing means 30. Then, the vibration device 13 is operated to apply vibration to the airtight box 10. Furthermore, each pallet 60 arranged and fixed on the pallet arrangement table 20 in this way is
Slightly more conductor pins 70 than the total number of pin insertion holes 63 (minimum supply amount) are supplied.
The airtight box 10 located below the pallet placement table 20 is kept in a reduced pressure state by the suction device 40 connected to the airtight box 10.

Further, in this pin insertion device 100, a pallet placement table 2 provided inside the airtight box 10 is used.
The airtight box 1 is located below 0.
Since a high-pressure gas supply device 80 is provided to intermittently supply high-pressure gas into the interior of the
By intermittently operating 0, even if the part of the airtight box 10 located below the pallet placement table 20 is maintained in a reduced pressure state by the suction device 40 connected to the airtight box 10, this high-pressure gas can be removed. The supply device 80 actively and intermittently releases the reduced pressure state caused by the suction device 40 in the airtight box 10. That is, the depressurized state is released by intermittent forced gas supply by the high-pressure gas supply device 80. For example, by opening the depressurized area to the atmosphere, the depressurized state is released. The release can be completed in an extremely short time compared to the conventional method of releasing the problem. This is because the gas is forcibly supplied by the high-pressure gas supply device 80, rather than due to the natural physical flow characteristics of the gas.

Furthermore, in this pin insertion device 100,
Since the swinging device 50 is provided between the airtight box 10 and the base 11, by operating this swinging device 50, the airtight box 10, that is, the pallet arrangement table 20 integrated therewith, is moved around the vertical plane. and swing from side to side. As a result, each pallet 60 arranged and fixed on the pallet arrangement table 20 swings, and each conductor pin 70 supplied thereon is moved left and right on each pallet 60 by its gravity. be.

As described above, each pallet 60 is vibrated and swung, and each pin insertion hole 63 formed in the pallet 60 is brought into communication with the airtight box 10 located below the pallet placement table 20. As a result, each conductor pin 70 flows left and right due to its gravity, and air is sucked into the lower side of the pallet placement table 20 through each pin insertion hole 63. According to this air flow, each conductor pin 70 is sucked into the pin insertion hole 63, and each conductor pin 70 is drawn into the pin insertion hole 63.
0 moves relative to the pallet 60, each conductor pin 70 is automatically inserted one by one into each pin insertion hole 63.

Moreover, in this case, by intermittently supplying high-pressure gas by the high-pressure gas supply device 80, only the conductor pins 70 that have not been inserted in the normal state are vibrated by the vibration device 13, and the pin insertion holes 63 of the pallet 60 are The next legal insertion will continue.

(Example) Below, the present invention will be explained in detail based on an example shown in the drawings.

FIG. 1 shows a partially enlarged vertical cross-sectional view of a pin insertion device 100 according to the present invention, and this pin insertion device 100 is called a pin grid array having a large number of conductor pins 70, as shown in FIG. It is used when manufacturing a board for mounting electronic components such as this. This board for mounting electronic components is manufactured by implanting a predetermined number of conductor pins 70 on the board constituting it, but in the prior step, a large number of conductor pins 70 are arranged in a predetermined state. It is necessary to keep it. This predetermined arrangement is made using, for example, a pallet 60 shown in FIG. 4, which has pin insertion holes 63 arranged in correspondence with the electronic component mounting board, and the conductor pins 70 are inserted into this pallet 60. This is a pin insertion device 100 according to the present invention.

The pin insertion device 100 includes an airtight box 10 that is connected to a vibration device 13 and arranged to be able to vibrate with respect to a base 11, a pallet placement table 20 formed in the airtight box 10 and having an opening 21, and Each pallet 6 placed on the pallet placement table 20
0 and the airtight box 10.
A suction device 40 that maintains the airtight box 10 in a reduced pressure state, a swinging device 50 that swingably supports the airtight box 10 with respect to the base 11, and a high pressure gas and a high-pressure gas supply device 80 that intermittently supplies.

In FIG. 1, the airtight box 10 is supported so as to be able to vibrate on a base 11 disposed at its lower part, and vibrations are applied by a vibration device 13 provided at the lower side of the airtight box 10. It is becoming more and more popular. Further, as shown in FIG. 1, a suction port 12 is formed at the bottom of the airtight box 10, and a suction device 40 is connected to this suction port 12.

Further, a pallet arrangement table 20 is formed in the airtight box 10 and is fixedly arranged in the airtight box 10. This pallet arrangement table 20
The upper surface is formed so that when each pallet 60 described later is placed thereon, these form one plane, and a plurality of openings 21 are formed in predetermined portions of the pallet placement table 20. . As a result, a large number of pallets 60 are placed on this pallet placement table 20.
When the pallet 60 is placed, the inside of the lower space of the pallet arranging table 20 communicates with the upper part thereof through each opening 21 and the pin insertion hole 63 of the pallet 60. Further, each pallet 60 placed on this pallet placement table 20 is fixed and supported to the pallet placement table 20 by a fixing means 30.

As shown in FIG. 1, the fixing means 30 includes a presser plate 31 placed on each pallet 60 placed on the pallet placement table 20, and a press lever that further presses the presser plate 31 with its upper surface. 32. In the case of this embodiment, the holding plate 31 is formed with openings 33 corresponding to the pin insertion holes 63 of the pallets 60, and these openings 33 allow each pallet 60 placed on the pallet placement table 20 to be held in place. The pin insertion hole 63 is exposed to the outside (upper side). Further, when the presser plate 31 is fixed, the tip of the press lever 32 is configured not to correspond to each opening 33 of the presser plate 31, as shown in FIG. By configuring the fixing means 30 as described above, the pin insertion hole 63 of each pallet 60 can be inserted into the presser plate 31 even when the pallet 60 is housed in the airtight box 10 and fixed by the fixing means 30. It can be exposed to the outside (above) through each opening 33 of. That is, the portion of the airtight box 10 located below the pallet placement table 20 communicates with the atmosphere through the opening 21 of the pallet placement table 20, the pin insertion hole 63 of each pallet 60, and each opening 33 of the holding plate 31. By reducing the pressure in the part of the airtight box 10 located below the pallet placement table 20 using the suction device 40 connected to the airtight box 10, the conductor pin 70 located on the holding plate 31 is inserted into the pin insertion hole 63. It can be sucked into the body.

The suction device 40 has a suction port 12 formed in an airtight box 10 located below the pallet placement table 20.
This suction device 40 continuously sucks the gas inside the airtight box 10. That is, this suction device 40 continuously suctions gas such as air in the space located below the pallet placement table 20 of the airtight box 10 from each suction port 12, thereby sucking each pallet 60 as described above. The gas existing above is caused to flow into the lower part of the airtight box 10 through the pin insertion hole 63. As this gas flows into the pin insertion hole 63, the conductor pin 70 located near the pin insertion hole 63 is attracted and inserted into the pin insertion hole 63.

Further, the airtight box 10 is connected to a base 11 via a swinging device 50. As shown in FIG.
An airtight box 10 is provided via a spring or the like. Furthermore, the vibration device 13 is integrally constructed within the airtight box 10. The swing shaft 51 is the base 1
It is driven by a drive source such as a drive motor M fixed on one side, and reciprocates around its axis via a gear box 52 by a predetermined angle. Thereby, when the swinging device 50 is driven, the entire airtight box 10 swings left and right within a predetermined angle range with respect to a vertical plane.

Furthermore, the high-pressure gas supply device 80 is connected to the airtight box 10 side located below the pallet arrangement table 20, and this high-pressure gas supply device 80
High pressure gas is intermittently supplied into the airtight box 10 located below the pallet placement table 20. That is, this high-pressure gas supply device 80 supplies the pallet arrangement table 2 which is maintained at a predetermined reduced pressure state.
By forcibly and intermittently supplying high pressure gas to the airtight box 10 side located below 0,
This is to temporarily and forcibly release the reduced pressure state within the airtight box 10.

Furthermore, in this embodiment, the high-pressure gas supply device 80 supplies the high-pressure gas by setting the activation and stop intervals of the high-pressure gas supply device 80 to 0.2 seconds, respectively. As described above, since this high-pressure gas supply device 80 repeats activation and deactivation within a short period of time, the conductor pin 70
(when the high pressure gas supply device 80 is stopped) and each pallet 6 in the normal state.
The conductor pins 70 that are not inserted into the pallet 60 can be removed repeatedly and in a short period of time (when the high-pressure gas supply device 80 is activated), and each conductor pin 70 can be inserted into the pallet 60 with high efficiency. . In other words, this high pressure gas supply device 80 is
The depressurized state in the airtight box 10 located below the pallet placement table 20 is not released by the natural flow of gas as in the conventional atmosphere-opening type, but is actively and forcibly released. A pin insertion device 1 according to the present invention
00 can be configured compactly.

In this embodiment, the high-pressure air supply device 80 discharges the high-pressure air through a suction port 12 formed in the airtight box 10 located below the pallet placement table 20, as shown in FIG. . When the discharge port of the high-pressure gas supply device 80 is placed near the airtight box 10 side of the suction port 12,
It is advantageous to directly cancel the suction pressure reduction effect by the suction device 40. Furthermore, the direction of the discharge port of this high-pressure gas supply device 80 is a direction that does not cause energy loss of the discharged high-pressure gas (for example, a direction parallel to the direction of the suction port 12 as shown in FIG. 1). It is good to say. Of course, the connection points and the number of connections of this high-pressure gas supply device 80 are not limited to these, and the pallet arrangement table 2
Any portion of the airtight box 10 located below 0 can be set appropriately.

The palette 60 is, for example, as shown in FIG.
It is composed of a main pallet 61 and a sub-pallet 62, and the sub-pallet 6 is placed on top of the main pallet 61.
2 are integrated by fitting them together. Note that this integration is performed at a stage before the pin insertion device 100, and the pallets 60 integrated in this way are placed on the pallet placement table 2 by appropriate means.
It is stored and placed on 0. Also, each main palette 6
Corresponding pin insertion holes 63 are formed in each of the 1 and auxiliary pallets 62, and when the main pallet 61 and the auxiliary pallet 62 are combined, these pin insertion holes 63 are aligned as shown in FIG. form two holes. The hole thus formed has a step, and the conductor pin 70 is inserted into the step.
The flange 71 is engaged to prevent the conductor pin 70 from falling out from the pin insertion hole 63. In addition,
A hole is formed in the main pallet 61 that does not correspond to the pin insertion hole 63 of the sub pallet 62, but this hole is a device different from the pin insertion device 100, and a conductor pin having a different shape from the conductor pin 70 is inserted into the hole. Sub pallet 62
It is inserted into the pin insertion hole 63 of the main pallet 61 from which the main pallet 61 has been removed.

In addition, in the above embodiment, the pin insertion hole 6
Although the case has been described in which the pallet 60 having the main pallet 61 and the sub-pallet 62 is composed of the main pallet 61 and the sub-pallet 62, the pallet 60 does not necessarily have to have such a structure, and may be composed of a simple single piece. It may be. That is, this pallet 60 has a predetermined number of pin insertion holes 63.
It is also possible to adopt a structure in which these are formed in a predetermined arrangement on one or more plates.

(Effects of the Invention) As described in detail above, in the present invention, as exemplified in the above embodiment, "the conductor pin is connected to the vibration device 13 and is arranged to be able to vibrate relative to the base 11. an airtight box 10 that houses a pallet 60 for inserting a pallet 70;
, a pallet placement table 20 having an opening 21 disposed within the airtight box 10 and communicating with the pin insertion hole 63 of the pallet 60, and a fixing means 30 for fixing the pallet placement table 20. Pin insertion hole 6 of pallet 60 on stand 20
In the pin insertion device for inserting the conductor pin 70 into the pallet placement table 3, the suction device 4 continuously sucks the gas in the airtight box 10 located below the pallet placement table 20.
0 to the airtight box 10, and a high pressure gas supply device 80 that intermittently supplies high pressure gas to the airtight box 10 side located below the pallet placement table 20, and connects the airtight box 10 to the base 11. A rocking device 50 is used to rock the airtight box 10 and the base 1.
Its unique feature lies in the fact that it is provided between 1 and 2 holes, which not only allows the pin insertion work to be performed automatically, but also
It is possible to actively create a pressure change for inserting a conductor pin to efficiently perform the insertion work of the conductor pin, and also to consume the conductor pin in the minimum amount of supply. It is possible to provide a pin insertion device 100 that is capable of minimizing damage and deformation.

That is, in this pin insertion device 100, the suction device 40 and the high pressure gas supply device 80 generate an intermittent gas flow for automatically inserting the conductor pin 70 into the pin insertion hole 63 of each pallet 60. We actively and forcibly created it by
Due to the vibrations provided by the vibration device 13, the conductor pins 70 which have been incorrectly inserted into the respective pin insertion holes 63 can be ejected from the respective pallets 60 within a short period of time. Also, at this time, the entire airtight box 10, that is, each pallet 60, is swung from side to side with respect to the vertical plane by the oscillating operation of the oscillating device 50, so that the conductor pins 70 located on this pallet 60 are Since it can flow left and right with respect to the pallet 60, the conductor pin 7
0 is evenly distributed throughout palette 60. As a result, the number of conductor pins 7 that is slightly larger than the total number of each pin insertion hole 63 (minimum supply amount)
Even if 0 is supplied, these conductor pins 70 can be inserted reliably.

In addition, the conductor pins 70 used for electronic component mounting boards are usually subjected to surface treatment (for example, soldering), and the conductor pins 70 may be exposed to vibrations for a long time using a vibrating device or the like. Although it is easily scratched and oxidized when exposed to air, the pin insertion device 100 according to the present invention can consume the conductor pins 70 in a short period of time with a minimum supply amount as described above. Since the structure is configured such that it can be carried out, not only is there less waste, but also the conductor pins 70 are prevented from being scratched or oxidized as described above.
It is possible to insert the pin into the pin insertion hole 63 of No. 0 reliably and automatically in a short time.

Furthermore, in this pin insertion device 100,
Since the suction device 40 is always operated in a constant state, the reduced pressure state is the same for any opening 21 of the pallet placement table 20. Therefore, even if the pallet placement table 20 itself is enlarged and a large number of pallets 60 are arranged, the pallet placement table 20
The pin insertion device 1 is effective when it is desired to insert the conductor pin 70 into the pallet 60 efficiently and to speed up the insertion work, since the required reduced pressure state in each opening 21 does not change at all.
00 can be provided with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a pin insertion device according to the present invention, FIGS. 2 and 3 are partially enlarged vertical cross-sectional views sequentially showing changing states of each conductor pin, and FIG. 4 is a pallet showing one embodiment. Fig. 5 is an enlarged front view of the conductor pin to be inserted into the pin insertion hole of the pallet by this pin insertion device, Fig. 6 is a top view of the same, and Fig. 7 is an electronic component mounting board. FIG. Explanation of symbols, 100...Pin insertion device, 10...
... Airtight box, 11 ... Base, 12 ... Suction port, 13 ... Vibration device, 20 ... Pallet placement table, 21 ... Opening, 30 ... Fixing means, 40 ...
Suction device, 50... Rocking device, 60... Pallet, 61... Main pallet, 62... Sub pallet,
63...Pin insertion hole, 70...Conductor pin, 71...
...Brim portion, 72...Head, 80...High pressure gas supply device.

Claims (1)

[Scope of Claims] 1. An airtight box that is connected to a vibrating device and arranged to be able to vibrate with respect to a base and that houses a pallet for inserting a conductor pin; a pallet placement table having an opening capable of communicating with the pin insertion hole of the pallet placement table; and a fixing means for fixing the pallet onto the pallet placement table; In the pin insertion device for inserting a pin, a suction device that continuously sucks gas in an airtight box located below the pallet placement table is connected to the airtight box, and the airtight box located below the pallet placement table is connected to the airtight box. A high-pressure gas supply device for intermittently supplying high-pressure gas is connected to the side, and a swinging device for swinging the airtight box with respect to the base is provided between the airtight box and the base. pin insertion device.