JPH0360199A - Hold and release method of extension pin for electronic component inserting device and mechanism - Google Patents

Abstract

PURPOSE:To hold or release and drop an extension pin only by control of the air and to facilitate operations for holding and recovering an extension pin by forming a structure for holding the pin at an air injection port. CONSTITUTION:Extension pins 3 are connected to the leads 1b of an electronic component 1, and inserted to holes 7a of a printed board 7 while guiding the leads by the pins. In this case, pressure air is injected from below to an air injection port 8a which is provided at a clinch 8 under the board so that the pin can be inserted and passed, thereby holding the component between the ramrod 6 at the upper side of the component 1 and the pin 3. After the leads are inserted in the holes of the board, injection of the pressure air to the air injection port is interrupted or the air is sucked by negative pressure to pass the pins through the holes 8a to be recovered downward.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an apparatus for inserting an electronic component with a lead wire into a printed circuit board, and in particular, an apparatus for inserting an extension pin into the lead wire in order to guide the lead wire into a hole in the printed circuit board. The present invention relates to a method and mechanism for holding and ejecting the extension pins under the printed circuit board in an apparatus for guiding and inserting the lead wires together with the extension pins into the printed circuit board.

[Conventional technology]

Conventionally, in order to insert electronic components with lead wires into printed circuit boards, the lead wires were held by an insertion guide from the top of the component body and the tips were guided to the holes in the board. There were limits to implementation. Therefore, instead of grasping the lead wire from the top of the electronic component to be inserted and inserting it directly into the board using an insertion guide, the applicant of the present invention proposed that the lead wire be extended by adding a straight pin to the tip of the lead wire. A patent application filed in 1986 proposed the so-called "extension pin method" in which the lead wires are guided and inserted into the board.
No. 218426). According to this method, there is no need to prepare insertion guides of various shapes depending on the shape and dimensions of the electronic components, and high-density insertion is possible without interfering with adjacent components even in narrow spaces. became.

[Problem to be solved by the invention]

However, after inserting an electronic component into a board using the extension pin as a guide for the lead wire, the extension pin must be retrieved from the underside of the board, and the inserted electronic component must be retrieved from the underside of the board. A clinching, so-called bending process is required to fix the tip of the component lead wire to the board, and a mechanism exists for this.Both functions are required in almost the same location, making the mechanism complex and requiring space. A problem arose in that a large amount of time was required.

Therefore, as described above, the present invention is an automatic insertion device that uses an extension pin spliced to a lead wire in order to guide the lead wire of an electronic component into a hole in a printed circuit board, in which the extension pin is held and recovered. An object of the present invention is to provide a method and mechanism for holding and ejecting an extension pin of an electronic component insertion device, which simplifies the mechanism and eliminates the need for extra space.

[Means to solve the problem]

In the present invention, the extension pin is supported from below during insertion of the electronic component into the board, and pressurized air is used as the supporting force, and this method is further made to function smoothly.

That is, in the present invention, in an electronic component insertion device in which an extension pin is spliced to a lead wire of an electronic component and the lead wire is inserted into a hole in a printed circuit board while being guided by the extension pin, the electronic component insertion device is provided in a clinch portion on the lower side of the printed circuit board. Insert the extension pin
Pressurized air is ejected from below to the air outlet that can pass through to exert a force that pushes the extension pin upward, holding the electronic component between the push rod on the upper side of the electronic component and the extension pin, and inserting the lead wire into the board hole. After the extension pin is inserted into the air outlet, a method for holding and discharging the extension pin is provided, in which the ejection of pressurized air to the air outlet is blocked or a negative pressure suction force is applied, and the extension pin is recovered downward through the extraction hole.

In addition, in an electronic component insertion device that connects an extension pin to the lead wire of an electronic component and inserts the lead wire into a hole in a printed circuit board while guiding the lead wire to the extension pin, it is possible to hold and release the lead wire above the printed circuit board, and A first holding mechanism that can move the component, a second holding mechanism that can hold and release the extension pin and move it, and a push rod that presses the electronic component from above are arranged, and the extension pin is inserted into the bottom of the printed circuit board. An extension pin holding/discharging mechanism is provided that includes a clinch portion having an air outlet that can pass therethrough, and means for supplying pressurized air to the air outlet.

[For production]

The extension pin is pushed upward by the pressurized air ejected upward from the air outlet, and is brought into contact with and joined to the lead wire of the electronic component. At this time, the extension pin has some flexibility depending on the degree of fitting with the air outlet, so errors in the extension pin itself and the lead wire can be absorbed, and the electronic components can be held by contacting the lead wire. . Further, after inserting the lead wire into the substrate hole, by blocking the jetting of pressurized air to the air jetting port or applying a negative pressure suction force, the extension pin falls downward under its own weight and is recovered. In this way, the present invention does not require complicated mechanical means to hold and retrieve the extension pin, so the configuration is simple and the space required for this can be reduced.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a step-by-step diagram showing a method for inserting an electronic component with a lead wire according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating its operation timing.

■The lead edge-equipped electronic component 1 has its lead wires 1b sandwiched between the tape mount 1C and the adhesive tape at predetermined intervals so as to be parallel to each other, and are continuously held in large numbers in the longitudinal direction of the tape mount IC. .

Cut the mount of the electronic component series approximately in the middle of adjacent electronic components to obtain a continuous electronic component piece with the lead wire of one electronic component fixed to the holding band, and then cut the lead wire with an appropriate cutter 2. Then, the tape mount IC is separated from the electronic component 1.

At this time, the lead wire 1b is cut to an appropriate length in advance. This point is disclosed in detail in Japanese Patent Application No. 114578/1983 entitled "Method for Cutting and Bending Lead Wires" (filed on May 13, 1986), which is the applicant's earlier application.

(2) A first holding mechanism (chuck) 4 holds a plurality of (two in the embodiment shown in FIG. 1) lead wires 1b of the electronic component 1 in a chuck in accordance with the spacing between the board holes 7a into which they are to be inserted. At this time, the electronic component 1 is in a vertical position with the main body 1a at the top and the lead wire 1b at the bottom. The extension pin 3 has a diameter large enough to freely pass through the board hole 7a,
The lower end 3a is tapered to facilitate insertion into the board hole 7a, and the upper end is a hole or recess 3 into which the lead wire tip can be inserted.
It has b. The second holding mechanism (chuck) 5 holds the extension pins 3 in a number equal to the number of lead wires 1b (two in the figure) by vacuum suctioning the upper parts of the extension pins so as to correspond to and parallel to the lead wires 1b. do.

The chuck mechanism using vacuum suction at this time will be described later with reference to FIG. At this time, extension pin 3 is connected to lead wire 1.
b (board holes 7a) and are held substantially vertically and parallel to each other at intervals corresponding to the intervals between the leads 1b of the electronic component 1 and moved to a corresponding position below the lead wire 1b of the electronic component 1 and above the board hole 7a. The position is close to line 1b.

■While holding the lead wire 1b and extension pin 3 close together, the tip of the extension pin 3 is inserted into the board hole 1b, and the extension pin holding/recovery part (clincher with extension pin recovery function) is waiting at the bottom. part) 8, and then each chuck 4.5 until it reaches the air jet port 8a to be described later and is inserted.
to lower the electronic component 1 and extension pin 3.

■The lead wire 1b and the extension pin 3 are each held by a chuck 4.5, but there is a push rod 6 above the electronic component 1, from above the push rod 6, the electronic component main body 1as')-do wire 1b,
At the bottom are extension pins 3, each of which is lined up vertically.

As it descends in this way, the lower tip of the extension pin 3 first passes through the board hole 7a, and then the pin tip reaches the air outlet 8a of the extension pin holding/recovery section 8 located in the clinch section. (In the drawings of the embodiment, the structure of the clink part that bends the tip of the lead wire 1b to prevent it from coming out from the board 7 is omitted). In this state, each chuck 4.5 is in a position where it does not interfere with the adjacent component 1d mounted on the printed circuit board 7. At this time, the extension pin 3 receives a force of being lifted upward by the injection of pressurized air from the clinch portion 8 side, and the tip of the lead wire 1b contacts the upper end of the extension pin 3 and enters the upper end hole 3b.

At this point, the holding of the lead wire 1b and the extension pin 3 is released. Even if the holding is released, the push rod 6 and the electronic component main body 1 are sandwiched between the push rod 6 and the extension pin 3 that receives upward force.
a, the configuration of the extension pin 3 is completed at the bottom of the lead wire 1b1. At this time, the substrate arm 7a and the air outlet 8a act so that the extension pin 3 is movable in its longitudinal direction but restrained in its folding direction.

■ In the above state, the electronic component 1 and the extension pin 3 are supported by the lifting force of the push rod 6 on the top of the electronic component 1 and the air jetted from the clinch section 8 on the bottom of the board, and the electronic component 1 is supported by the push rod 6 while maintaining the supported state. Lower 1.

(2) After inserting the lead wire 1b into the board hole 7a, the extension pin 3 is recovered by the clinch section 8. That is, the injection of pressurized air is stopped when the lead wire 1b is inserted into the board hole 7a. Alternatively, in order to quickly remove the pressure and smoothly recover the extension pin 3, the air may be temporarily set to negative pressure to perform a suction action. The extension pin 3 falls downward from the clinch portion 8 and is recovered.

This completes one cycle of the process of inserting the electronic component 1 with lead wires, and the extension pins are collected after use, circulated, and used again. FIG. 3 shows an embodiment of the circulation path of such an extension pin.

In FIG. 3, an extension pin circulation path including a holding/recovering section 8 for the extension pin 3 and a supply section 30 for supplying the recovered extension pin 3 is illustrated. The support/recovery part 8 for the extension pin 3 on the back side of the printed circuit board 7 is built into the clinch part (not shown) of the lead wire as described above, and is a collection case for collecting the extension pin 3. At the upper part of the electronic component 1, there are air jet ports 8a at intervals corresponding to the intervals between the board holes 7a into which the lead wires 1b of the electronic component 1 are inserted. Collection case 2
The first internal recovery chamber 23 is opened and sealed by a lid 22, and is connected to an air control device 25 such as a compressor by a pipe 24. By supplying pressurized air from the air control device 25 to the recovery chamber 23 when the lid 22 is closed and sealed, a force pushing the extension pin 3 upward is generated as described above. Lead wire 1b of electronic component 1 is connected to board hole 7
When the supply of pressurized air is stopped after the extension pin 3 is inserted into the air outlet 8a, the extension pin 3 falls downward from the air outlet 8a and enters the recovery chamber 23.

Therefore, the collection chamber 23 has a dimension higher than the length of the extension pin 3. When the lid 22 is opened after the extension pins 3 have fallen, the extension pins 3 are ejected as indicated by the arrows and are sequentially collected in the collection box 27.

When an appropriate amount of extension pins 3 are collected in the collection box 27, the collection box 27 is transported to the supply section 30, or fed into a vibrating supply device 31 having an annular passage 32 on a suitable belt conveyor as shown by the arrow.・Replenished. The extension pins 3 are arranged in a row in the passage 32 with the tapered ends 3a facing forward. The outlet of the annular passage 32 is continuous with a guide passage 33 extending tangentially from the vibrating feeding device 31 .
3 is connected to a separation mechanism 45 for the extension pins 3 that have fallen in a single row.

In the separation mechanism 45, first, the air cylinder (lower) 46 comes out into the passage, the fallen extension pin 3 is stopped, and then the continuing extension pin 3 is held down by the air cylinder (upper) 47, and the air cylinder ( When the lower part 46 is retracted, the extension pin 3 at the lower end is dropped into the supply device 35. Next, the air cylinder (lower) 46 comes out into the passage again, and then the air cylinder (
Upper) By retracting 47, the extension pins 3 are separated one after another in synchronization with the rotation of the supply device 35. Vertical grooves 36 are provided around the feeding device 35 at predetermined intervals, and an outer guide plate 34 and a support plate 41 fixed to the lower side are attached.

The extension pin 3 passed from the guide passage 33 is connected to the separation mechanism 4
5 and fall into the groove 36 one by one. The feeding device 35 rotates intermittently in the direction of the arrow, and the extension pin 3 is fed intermittently while being held by the guide plate 34.

There is an air cylinder 37 at a predetermined position below the supply device 35, and when the supply device 35 is stopped, a plurality of (two) extension pins 3
is raised (supplied) in the direction of the arrow at this position. On the other hand, there is a chuck index 38 adjacent to the supply device 35, and pin chucks (second holding mechanism) 5 arranged at equal intervals on the circumference of the lower part 39 are at positions where the upper part of the raised extension pin 3 can be vacuum chucked. Therefore, when the chuck index 38 descends during the insertion operation and reaches the lowest position, the pin chuck 5 vacuum chucks the extension pin 3, and then rises.
When the component is removed from the supply device 35, the index lower part 39 rotates to a predetermined component insertion position.

An index upper part 40 having a lead wire chuck (first holding mechanism) 4 is arranged concentrically with the index lower part 39, and the lead wire chuck 4 is located at the same radius position as the pin chuck part 5 at equal intervals on the circumference. It can be raised and lowered individually relative to the index 38, and is normally in the raised position, movable radially, and normally out. Electronic parts 1
is mechanically clamped to the lead wire chuck 4 at another position (not shown), the lead wire is cut and the mount is separated, and the electronic component 1 is rotated to a predetermined component insertion position. The lead wire 1b is a plurality of (two) extension pins 3.
It comes to the position immediately above corresponding to .

Then, the push rod 6, the first holding mechanism (lead wire chuck)
4 and the second holding mechanism (pin chuck) 5 are lowered, and as described above, the extension pin 3 and electronic component 1 are lowered in the direction of the arrow by the push rod 6, and the lead wire 1b of the electronic component 1 is inserted into the board hole 7a. Ru.

Note that in the above embodiment, the electronic component 1 having two lead wires 1b was handled, but when handling an electronic component having one or three or more lead wires, the number of lead wires corresponding to the number of lead wires 1b is This is possible by using an extension pin for each cycle.

In addition, when using a pipe or tube made of low-cost plastic or the like cut to a predetermined length as the extension pin 3, collect the extension pin 3 as described above,
Does not need to be reused.

FIG. 4 is a detailed perspective view of the second holding mechanism (pinchuck) 5. As shown in FIG. A number of extension pin positioning/guide grooves 51 (only one shown) equal to the number of lead wires of the electronic component are provided parallel to the lead wires, and each groove 51 holds the upper part of the extension pin 3 by vacuum suction. There is a suction hole 52 connected to a vacuum pump (not shown) for holding the extension pin 3. Therefore, when the vacuum pump is moved, the extension pin 3 is suctioned to the suction hole 52,
It is held in the guide groove 51. In this way, by using vacuum suction as the mechanism of the chuck that holds the extension pin 3, the structure of the chuck can be simplified, the extension pin 3 can be easily supplied, and the extension pin 3 can be held to a certain extent in the longitudinal direction. Even if the position of the tip of the lead wire 1b varies slightly, it can be adjusted by being able to move when the force is exceeded, or the extension pin 3 is held by the chuck 5, and the pressure from the air outlet 8a is applied as described above. Air can be used to push up the extension pin 3 from below and bring it into contact with the lead wire 1b, or to insert the upper end hole 3b of the extension pin 3 into the tip of the lead wire 1b.

Fig. 5 is a front view of another embodiment of the extension pin holding/recovery section 8, Fig. 6 is a side view of the same embodiment when pressurized air is ejected, and Fig. 7 is a side view of the same embodiment when the pin falls. It is a diagram. Upper end 6
1 is the main body 6 of the extension pin holding/recovery part 8 with a bolt 62
0, and the upper end 61 has a number of air outlets 8a equal to the number of lead wires of the electronic component (three in this embodiment) for inserting the lead wires into the board holes into which they are to be inserted. They are arranged vertically and parallelly with corresponding spacing. If the number or spacing of the lead wires is different, only the upper end 61 may be replaced with a matching one. The main body 60 includes an upper end 6
A recovery port 64 at the lower end communicating with the air outlet 8a of No. 1
There is a vertical hole 63 open at. A pipe 65 for supplying pressurized air or applying negative pressure to the air outlet 8a is connected to the middle part of the vertical hole 63, and this pipe 65 is connected to an air compressor or a vacuum pump via a valve or the like (not shown). etc., to a pneumatic control device (not shown). Near the bottom of the vertical hole 63 is an opening/closing piston 67 that can reciprocate within a passage 66 provided perpendicularly across the vertical hole 63. This opening/closing piston 67 has a hole 68 having approximately the same diameter as the inside diameter of the vertical hole 63. Normally, the opening/closing piston 67 is pushed leftward by a spring 69 as shown in FIG. It is located at the same position as the vertical hole 63 and opens the vertical hole 63.

The opening/closing piston 67 is connected to a driving piston (not shown) in the cylinder 71 via a piston rod 70, and as shown in FIG.
By supplying pressurized air into the cylinder 71, a driving piston (not shown) in the cylinder 71 is driven to the right, and the opening/closing piston 67 is moved to the right against the spring 69, thereby opening the vertical hole 63. Close. At this time, vertical hole 6
3 is in a substantially sealed state except for the air outlet 8a. Note that the position of the opening/closing piston 67 in this closed position can be adjusted by a stopper 74. In this state, when pressurized air is supplied from the pipe 65 into the vertical hole 63, the pressurized air is ejected from the air ejection port 8a and holds the extension pin while exerting an upward force as described above.

After the lead wire of the electronic component is inserted into the board hole, stop supplying pressurized air to the piping 72 on the left side, or supply pressurized air into the cylinder 71 from the piping 73 on the right side as shown in FIG. This moves the opening/closing piston 67 to the left along with the action of the spring 69, moves the hole 68 of the opening/closing piston 67 to the same position as the vertical hole 63, and opens the vertical hole 63.

As a result, the pressurized air in the vertical hole 63 escapes from the lower recovery port 64 and is naturally exhausted, and the upward pressure on the extension pin disappears, causing the extension pin to fall down the vertical hole 63 under its own weight and descend from the recovery port 64. and placed in a suitable collection box or conveyor belt (not shown). In this case, if necessary, connect the piping 65 to a negative pressure source as shown in FIG. 7 to instantly eliminate the pressurized air in the vertical hole 63 by forced exhaust, and apply a negative pressure suction force. It is convenient to facilitate the fall of the extension pin.

By repeating the above operations in a timely manner, the pressurized air can be injected and the extension pin can be recovered efficiently.

〔Effect of the invention〕

(1) The first effect is that the extension pin is held by the air outlet, which simplifies the support mechanism for the extension pin. That is, the extension pin can be held, released, and dropped by simply controlling air, and the structure for holding and recovering the extension pin is simple and the operation is easy.

(2) As a second effect, in the relationship between the electronic component lead wire and the extension pin, even if there is some variation in the tip of the electronic component lead that has been cut, the extension pin can receive a constant flow of pressurized air from below. Since it is pushed up by the pressure of , the variation can be absorbed by the extension pin side. Similarly, other parts, such as the push rod 6 and each chuck 4.5,
Even if there are slight timing errors, they can be absorbed.

(3) As a third effect, since the electronic components to be inserted and the extension pin are supported in the vertical direction by the pressure of the push rod and the air from below, unnecessary stress is not applied to the extension pin itself. First, the life of the extension pin can be extended.

4. Brief explanation of the rgJ plane Fig. 1 is a schematic diagram showing the method of inserting an electronic component with lead wires in the order of steps according to an embodiment of the present invention, Fig. 2 is a diagram explaining the operation timing, Fig. 3 4 is a detailed perspective view of the second holding mechanism (pin chuck), and FIG. 5 is a front view of another embodiment of the extension pin holding/recovery section. Figures 6 and 7 are side views of the embodiment shown in Figure 5. Figure 6 shows the state in which the extension pin is held by blowing out pressurized air, and Figure 7 shows the state in which the extension pin is dropped. It shows.

■...Electronic component, 4...First holding mechanism (lead chuck), 1a...
Main body, 5...Second holding mechanism (pinchuck), 1b...Lead wire, 6...Press mechanism (push bar), IC...tape mount, 7...Printed circuit board, 1d...adjacent Parts, 7a... Board hole, 2... Cutter, 8... Extension pin holding/recovery part (clinch part), 3...
・Extension pin, 8a...Air outlet, 3a・
...Taber part, 3b...hole.

■ ■ ■ ■ Operation explanatory diagram of the embodiment Figure 2 Extension pin holding/recovery part (when pressurized air is blown out) Figure 6

Claims (5)

[Claims] 1. Attach the extension pin (3) to the lead wire (1b) of the electronic component (1).
), and the lead wire is inserted into the hole (7a) of the printed circuit board (7) while being guided by an extension pin.
), pressurized air is ejected from below to the air outlet (8a) through which the extension pin (3) can be inserted and passed, applying a force to push the extension pin (3) upward, and pushing the extension pin (3) upward. The electronic component is held between the push rod (6) and the extension pin (3), and after the lead wire is inserted into the board hole, the jetting of pressurized air to the air jetting port is shut off or negative pressure suction is performed. A method for holding and discharging an extension pin by applying force and collecting the extension pin downward through the hole (8a). 2. Attach the extension pin (3) to the lead wire (1b) of the electronic component (1).
) is connected in a straight line and inserted into the hole (7a) of the printed circuit board (7) while the lead wire is guided by an extension pin. A first holding mechanism (4) that can move the component, a second holding mechanism (5) that can hold and release the extension pin and move it, and a push rod (6) that presses the electronic component (1) from above are arranged. , a clinch part (8) having an air outlet (8a) through which the extension pin (3) can be inserted and passed under the printed circuit board, and means (25) for supplying pressurized air to the air outlet (8a). An extension pin holding/ejection mechanism is provided. 3. Claim 2: A plurality of air jet ports (8a) are arranged in parallel corresponding to the number of lead wires (1b) of the electronic component (1).
Extension pin retention and ejection mechanism as described in . 4. The clinch portion (8) has a vertical hole (63) communicating with the air outlet (8a), and the vertical hole (63)
) is provided with means (67, 68) for opening and closing the opening and closing means (67, 68), and the vertical hole (63) is substantially sealed except for the air outlet (8a) when the opening and closing means are closed;
) and the opening/closing means (67, 68), an air pressure control means is connected to the vertical hole (63). 5. The air pressure control means includes the air jet port (8a).
5. The extension pin holding/discharging mechanism according to claim 4, wherein the extension pin holding/discharging mechanism is capable of supplying pressurized air and/or applying negative pressure suction force to the extension pin holding/discharging mechanism.