JPS6255320B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic component insertion method for inserting an electronic component having a plurality of lead wires extending in the same direction from a body into a printed circuit board.

Conventionally, the method of inserting this type of component is to align the insertion hole of the printed circuit board with the lead wire of the electronic component to be inserted by guiding or chucking the lead wire to align the tip of the lead wire with the hole position of the printed circuit board. It depends on how you insert it. However, according to the above method, the lower lead wire of the component body is guided.
Or, after inserting the guide member or chuck member into a printed circuit board for checking, it is necessary to escape and retreat beyond the planar outermost dimension of the component body, and the insertion space inevitably requires a space larger than the planar outermost dimension of the component body. For example, when parts are closely spaced, automatic insertion is not possible. Furthermore, according to the conventional method, as the entire board becomes larger to enable automatic insertion, it is actually impossible to enable fully automatic insertion.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a method for inserting electronic components that can be inserted at high density.

That is, the present invention stops the lead wire guide or chuck for aligning the lead wires with the printed circuit board insertion holes, measures the positions of the ends of the plurality of lead wires in the X and Y directions in advance, and determines the positions of the printed circuit board insertion holes. The error between the lead wire position and the insertion hole position of the printed circuit board is fed back to the X, Y moving device of the printed circuit board, and the lead wires are inserted one by one at the time of insertion, and the error between the lead wire position of each lead wire and the insertion hole position of the printed circuit board is , and the Y moving device so that the tip of the lead wire matches the insertion hole position of the printed circuit board and is inserted, and this is done for each lead wire to complete the insertion of one electronic component.

The present invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 shows an electronic component in which a plurality of lead wires of different lengths extend in the same direction from the main body. Fig. 2 is a perspective view showing the overall schematic configuration of an embodiment of the device for carrying out the electronic component insertion method of the present invention, and Fig. 3 is an enlarged view of the part where the lead of the electronic component is inserted into the insertion hole of the printed circuit board. FIG. 4 is a diagram showing a schematic configuration of a device for detecting the position of the lead tip of an electronic component, and FIG. FIG. That is, 1 is the main body part 1a
This is an electronic component in which two lead wires 2 and 3 having different lengths h (approximately 2 mm) are extended in the same direction. 4
1 is a group of magazines in which various taped electronic components 1 are stored in a radial manner. Reference numeral 5 denotes a main body 1 of a predetermined type of electronic component 1 sent together with the tape to the terminal of a predetermined magazine in the magazine group 4.
While holding the lead wires 2 and 3 with a cutter (not shown), cut the lead wires 2 and 3 with a difference of h (approx. This is a transport arm member that transports the component 1. Reference numeral 7 is an index table having chuck claws 8 and 9 for holding the electronic component 1, and the main body 1a.
A spring that supports a pressing part 10 that presses the upper end so as to be slidable in the vertical direction, and positions the chuck pawls 8, 9 and the pressing part 10 at the upper end position when the chuck pawls 8, 9 are closed. When the chuck pawls 8, 9 move to the lower end position and are in the open state, the chuck pawls 8, 9
For example, four chuck mechanisms 11, which are attached to a lock mechanism (not shown) for stopping the movement of the chuck mechanism, are attached at regular intervals around the periphery. B is a lead wire position detection station that detects the tip position of each lead wire extending from the main body portion 1a of the electronic component 1. C
Based on the tip position data of each lead wire detected by station B, the table on which the printed circuit board is placed is moved in the X-axis direction and the Y-axis direction, and each lead wire of electronic component 1 is inserted into the insertion hole of the printed circuit board. This is a lead wire insertion station that inserts two or three wires in sequence. Above the chuck mechanism 11 located at this lead wire insertion station C, there is a chuck mechanism 1.
A drive mechanism 13 for driving the base 12 is attached to a support 12a extending upward from the base 12. This drive mechanism 13 is composed of two cylinders 14 and 15 in a relationship that causes the chucks 8 and 9 of the chuck mechanism 11 to move downward in two steps.
Connect the rod 16 to the output shaft of the rod 1.
6 is covered with a sleeve 18, and this sleeve 18 is connected to the output shaft of the cylinder 15 via a plate 19. 20 descends and becomes a lock release mechanism which acts to release the lock of the lock mechanism, and connects the feed station A of the support column 12a.
installed in position. Reference numeral 21 denotes a lead wire position detection device that detects the position of the leading wires 2 and 3 of the electronic component 1 held by the chucks 8 and 9 of the chuck mechanism 11 by capturing images from below.
As shown in the figure, a light source 22, a condensing lens 23, an objective lens 24, a semi-transparent mirror 25, an imaging lens 26,
The imaging device 27 includes a TV camera, two-dimensionally arranged solid-state image sensing devices, and a pair of slit scanning devices installed in front of the light receiving device in the X-axis direction and the Y-axis direction.
Reference numeral 28 has a reference pin (not shown) on the top surface for inserting and positioning a reference hole (not shown) provided in the printed board 30, on which the printed board 30 is placed, and is connected to the X-axis motor 31. An X-axis table 29 is mounted with an X-axis table 28 that moves in the X-axis direction by a connected feed screw mechanism, and moves in the Y-axis direction by a feed screw mechanism connected to a Y-axis motor 32. This is a table that moves in the Y-axis direction. However, in response to a command from the control device 35, the transfer arm member 5 transfers a predetermined type of electronic component 1 from the magazine group 4.
It moves while rotating to the magazine where it is stored in a taped state and stops, and the lead wire parts 2 and 3 of the electronic component 1 located at the end of this magazine are clamped by the chuck at the tip and installed there. The tips of the lead wires 2 and 3 are cut with a length difference of h by a pair of cutters (not shown) arranged at different levels, and then the transfer arm member 5 rotates to move to the supply station. Move to A and stop. Then, the lock release mechanism 20 is actuated by a command from the control device 35, and the chuck claws 8, 9 of the chuck mechanism 11 located there are closed from the open state by the built-in spring force, and the supply station A,
That is, the main body 1a of the electronic component 1 placed between the chuck claws 8 and 9 of the chuck mechanism is held. Then, according to a command from the control device 35, the index table 7
The chuck mechanism 11, which rotates through a predetermined angle and clamps the electronic component 1, is positioned above the lead wire position detection device 21 and stops. The imaging device 27 has a light source 2 at the tip of the lead wires 2 and 3 as shown in FIG.
2 is illuminated from below, the reflected light image is captured while scanning in a two-dimensional direction to obtain a video signal, and the video signal is transmitted to a binarization circuit, a storage circuit, Binarize it into pixels using an arithmetic processing circuit, find the intermediate position of the "1" level based on the vertical synchronization signal and horizontal synchronization signal, and calculate the deviation (displacement amount) of the tips of the lead wires 2 and 3 from the reference position. ) is detected. When the deviation of the tips of the lead wires 2 and 3 from the reference position is determined in this way, the controller 35
The index table 7 rotates by a predetermined angle and stops, and the chuck mechanism 11 which holds the electronic component 1 whose tip positions of the lead wires 2 and 3 have been determined
stops at insertion station C.

On the other hand, since the insertion holes etc. for inserting the lead wires 2 and 3 of the electronic component 1 are drilled at predetermined positions in the printed circuit board 30, the position information can be used in accordance with the insertion order of the lead wires, that is, the lead wires to be inserted. Record on a recording medium such as paper tape or magnetic tape in descending order of length. Therefore, using an input device such as a paper tape reader, first input the position coordinates of the insertion hole 36 for the longer lead wire 2 into the control device 35, and at the same time input the position coordinates of the insertion hole 36 for the longer lead wire 2 stored in the storage device (not shown). The positional deviation of the lead wire 2 is read out, and the above positional coordinates are calculated and corrected by an arithmetic circuit (not shown).
A drive circuit (not shown) is driven so that the X-axis motor 31 and the Y-axis
The axis motor 32 is operated by a predetermined amount to move the X-axis direction table 28 and the Y-axis direction table 29. Then, the center of the insertion hole 36 of the printed circuit board 30 placed on the X-axis table 28 and the axis position of the tip of the lead wire 2 are aligned in the X, Y plane. Next, the cylinder 14 is operated to lower the rod 16 by a predetermined amount, and the chuck mechanism 11
, and the chuck claws 8, 9 and the pressing part 10 are also lowered by a predetermined amount. Since the lead wire 2 is cut longer than the lead wire 3, only the tip of the longer lead wire 2 is cut into the insertion hole as shown in FIG. 5a.
6. Next, operate the input device (not shown) to input the position coordinates of the insertion hole 37 for the shorter lead wire 3, and input the position coordinates of the short lead wire 3 stored in the storage device (not shown). Read out the positional deviation of 31 and Y-axis motor 32 are operated by a predetermined amount to move the X-axis direction table 28 and the Y-axis direction table 29 to move the printed circuit board 30.
The center of the insertion hole 37 and the axial position of the tip of the lead wire 3 are aligned in the X and Y planes. Note that the distance between the insertion holes 36 and 37 and the lead wire 2
If the distances between and 3 do not match, the longer lead wire 2 will be deformed. Next cylinder 1
5, the sleeve 18 is lowered so as to protrude below the rod 16, and the chuck claws 8, 9 are removed.
Then, the pressing part 10 is also lowered so that the tip of the shorter lead wire 3 also enters the insertion hole 37 as shown in FIG. 5b. Furthermore, actuate the cylinder 15 to release the sleeve 1.
8 is lowered, the lowering of the chuck pawls 8 and 9 is stopped, and the chuck pawls 8 and 9 are opened against the spring force, and the pressing part 10 is further lowered while being maintained by the lock mechanism. As shown in FIG. 5c, the lead wires 2 and 3 of the electronic component 1 are securely inserted into the insertion holes 36 and 37 of the printed circuit board 30.

In this way, the lead wires of electronic components are cut to have different lead wire lengths, and the corresponding insertion holes are placed on the printed circuit board in the order of the lead wire length, based on the position of the lead wires obtained in advance using a visual device. Since positioning is performed while making corrections based on measurement information, the lead wires of the electronic components can be sequentially inserted into the insertion holes of the printed circuit board simply by lowering the electronic components a predetermined amount at a time.

As explained above, according to the present invention, there is no need for a lead wire guide mechanism or a chuck mechanism for aligning the lead wires with the insertion holes of the printed circuit board, and high-density insertion is possible. This has the effect of greatly improving automation.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an electronic component according to the present invention, FIG. 2 is a perspective view showing a schematic configuration of an apparatus for implementing the electronic component insertion method of the present invention, and FIG. 3 is a diagram showing an electronic component in FIG. A partially enlarged view showing the lead wire being inserted into the insertion hole of the printed circuit board, Fig. 4 is a block diagram showing the outline of the lead wire position detection device shown in Fig. FIG. 3 is a plan view showing a state in which lead wires are sequentially inserted into insertion holes of a printed circuit board. Explanation of symbols, 1...Electronic parts, 2, 3...Lead wires, 4...Magazine group, 5...Transport arm member, 7...Index table, 8, 9...Chuck claw, 10...Press Part, 11...Chuck mechanism, 21...Lead wire position detection device, 27...Imaging device, 28...X-axis direction table, 29...Y
Axial table, 30... Printed circuit board, 35...
...control device, 36, 37...insertion hole.

Claims (1)

[Claims] 1. Holding an electronic component having a plurality of lead wires extending in the same direction from the main body, cut each of the lead wires at substantially right angles to the lead wire axis direction so that the lead wire lengths are different from each other, and cut the lead wires. The coordinates of the center position of the lead wire cut surface are measured for each lead wire using a visual device installed opposite the cut surface, and based on this measurement information, the longest lead wire is first matched to this lead wire. After correcting the position so that it matches the insertion hole provided on the board, the electronic component is moved toward the board, and the longest lead wire is inserted into the corresponding insertion hole. A method for inserting an electronic component, characterized in that all lead wires of the electronic component are inserted into corresponding insertion holes by repeating position correction and insertion operations in order of increasing wire length.