JPH05275899A - Missing part inspecting apparatus - Google Patents

Abstract

PURPOSE:To enable the quick and sure inspection of the state of mounted parts for any parts coming off, damaged or missing parts by detecting whether inspection probes have gone into insertion holes or not. CONSTITUTION:A substrate 14 mounted with parts is transported on transport rails 13 to a substrate reversing unit 14. A reversing frame 19 is moved up, and both ends of the substrate 14 mounted with parts are clamped by a rotary clamping wheel 22 and a clamping wheel 26. When the clamped substrate 14 mounted with parts has been moved up, the rotary clamping wheel 22 is rotated, reversing the substrate 14 mounted with parts. The substrate 14 mounted with parts is then transported on the transport rails 13 until it is stopped by a stopper 37 of an inspection unit 12. An air cylinder 32 is actuated, moving down a cylindrical inspection plate 35. If there are any missing parts, inspection probes 36 go into lead insertion holes in the substrate 14 mounted with parts, and thus the cylindrical body is stationary there; if leads of the mounted part are in the lead insertion holes, the inspection probes cannot go in, and thus the cylindrical body is lifted up. Thus missing parts and the state of inserted leads are detected by checking the state of the cylindrical body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an out-of-stock inspection device, and more particularly to a technique for detecting an out-of-stock state of electronic components mounted on a mounting board.

[0002]

2. Description of the Related Art Conventionally, as this kind of shortage inspection technique,
The one shown in FIG. 6 is known. In the state where the leads a and b of the plurality of electronic components A, B ... Are inserted into the insertion holes 1a of the mounting board 1 having the wiring pattern 2 formed on the back surface and the lead ends protruding toward the back surface of the board 1 are bent. Is a technique of detecting the presence or absence of the electronic components A, B ... by lowering the inspection rods 3 to 3 from above the surface of the mounting substrate 1.

[0003]

However, in such a conventional device, there are problems that the mounted electronic parts are tilted or the shape of the electronic parts is not suitable. Further, as shown in FIG. 6, the lead b of the electronic component B
However, when the mounting board 1 is not in the insertion hole 1a or the electronic component is about to come off, there is a problem that the failure cannot be detected. Further, in recent years, the mounting density has increased, and even when observed from the surface side of the mounting substrate, problems such as difficulty in finding the defect have occurred.

The present invention was devised by focusing on the above-mentioned conventional problems.
The purpose of the present invention is to obtain a missing item inspection device that can reliably detect missing items, etc., and reduce the labor and labor required for inspection.

[0005]

Therefore, according to the present invention, there is provided a board reversing means for reversing a mounting board on which a plurality of electronic components are mounted by inserting leads into the through holes so that the back surface of the board faces upward, and the board reversing means. The inspection needle insertable into each insertion hole of the mounting board inverted by the means is lowered from above to detect whether or not the inspection needle is inserted into the insertion hole. It is a solution.

[0006]

The substrate reversing device faces the back surface of the mounting board, that is, the wiring pattern surface side upward. Therefore, the inspection needle of the inspection means can directly face the insertion hole of the board, and the electronic component body does not interfere with the inspection. By lowering the inspection needle, it becomes possible to detect the presence or absence of the lead of the electronic component in the insertion hole.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the shortage inspection device according to the present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 1 is a front view of the shortage inspection device of this embodiment, and FIG. 2 is a side view thereof. In the figure, reference numeral 10 denotes a shortage inspection device, which is roughly composed of a board reversing section 11, an inspection section 12, and transfer rails 13 and 13 for transferring a mounting board.

The carrier rail 13 is installed over the board reversing section 11 and the inspection section 12, and as shown in the figure, the mounting board 1 is mounted.
4 can be placed on the sheet and conveyed by a conveying means (not shown). Further, a stopper 37 that can move up and down is provided between the transport rails 13 and 13 in order to stop the mounting board 14 transported on the transport rails 13 and 13 at a predetermined position of the inspection unit 12.

The substrate reversing unit 11 is equipped with air cylinders 15 and 16 so that the raising / lowering operation is performed in two stages. The air cylinder 15 is fixed to the mounting plate 17, and the tip of the piston rod 18 of the air cylinder 15 has a reverse base frame 19.
It is installed in the center of. Also, the air cylinder 16
The lower end of the air cylinder 16 is fixed to the mounting plate 20.
The tip of the piston rod 21 is attached to the attachment plate 17. Further, two guide rods 21 and 21 are fixed to the lower surface of the reverse base frame 19 downward, and these guide rods 21 and 21 are slidable by penetrating both ends of the mounting plates 17 and 20, respectively. Is fitted to.

A rising plate 19 is provided at both ends of the inversion base frame 19.
A and 19B are integrally provided. A rotary holding wheel 22 is provided on the inner surface of the upper end portion of the rising plate 19A, and the wheel 22 is rotationally driven by a motor 25 fixed to one end portion of the reversing base frame 19 via bevel gears 23 and 24. Power is transmitted. Also, on the upper part of the rising plate 19B,
A holding wheel 26 facing the rotating holding wheel 22 is rotatably provided, and the wheel 26 is mounted on the end of a piston rod 28 of an air cylinder 27. Therefore, the operation of the air cylinder 27 causes the holding wheel 2 to move.
6 can reciprocate in the direction of the arrow in FIG.

The inspection unit 12 is provided with an elevating body 30 which is vertically slidable with respect to columns 29, which are erected on the side of the rail 13, and the elevating body 30 is provided in the main body 31 of the apparatus. It is adapted to be driven up and down by an air cylinder 32. Then, the lifting body 30 is provided with an inspection plate mounting frame 33 in the horizontal direction, and the inspection plate mounting frame 33 includes
Clamps 34A and 34B are provided so that the inspection plate 35 can be held by these clamps 34A and 34B. The position where the inspection plate 35 is held is right above the mounting board 14 which is the plate to be inspected on the transport rails 13, 13. The inspection plate 35 is provided with a large number of inspection needles 36 inserted from top to bottom.
As shown in FIG. 3, 6 are arranged at the positions corresponding to the respective lead insertion holes 14B of the mounting substrate 14 which is turned over by the substrate reversing unit 11 and conveyed. Above the inspection needle 36,
Cylinder body 36A which is a terminal for identification for fall prevention and inspection
Are formed.

The operation and operation of this apparatus will be described below.

First, the mounting board 14 that has been mounted and assembled (before soldering) is transferred to the board reversing unit 1 by the transfer rails 13 and 13.
1 to the predetermined position, the air cylinder 15 is operated to raise the reversing base frame 19, and then both ends of the mounting substrate 14 mounted on the transfer rail 13 are rotated and held by the wheels 22.
And the holding wheels 26. At this time, the air cylinder 27 pushes the gripping wheel 26 inward.

Next, the air cylinder 16 is operated to raise the sandwiched mounting substrate 14, and then the motor 25 is rotated to rotationally drive the reversing sandwiching wheel 22 to turn the mounting substrate 14 upside down. Next, the air cylinders 16 and 15 are sequentially operated to mount the mounting substrate 14 on the transfer rails 13 and 13 again.

After that, the mounting board 14 is mounted on the carrier rail 1.
It is conveyed on the sheets 3 and 13 and stopped by the stopper 37 at the inspection unit 12. Next, the air cylinder 32 is operated to lower the inspection plate 35. As a result, the state of FIG. 3 (A) changes to the state of FIG. 3 (B), and if there is a missing item as shown in the figure, the inspection needle 36 enters the lead insertion hole 14B of the mounting board 14 and the cylindrical body 36A does not move, and when the lead of the mounted component is passed through the lead a insertion hole 14B, the inspection needle 36 does not enter and the columnar body 36A floats.
By detecting such a state of the cylindrical body 36A,
It is possible to detect the out-of-stock state and the insertion state of the lead a. As the detecting means, various detecting means can be adopted, for example, a switch is arranged so that the warning light is turned on by the movement of the head of the cylindrical body 36A.

The mounting board 14 that has been inspected by the inspection section 12 is conveyed by the conveying rails 13 and 13 and is separated into a mounting board 14 having a missing item and a mounting board 14 having no missing item. It

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various design changes associated with the gist of the configuration can be made.

[0019]

As is apparent from the above description, according to the present invention, it is possible to easily and quickly inspect the mounting state of electronic components on a mounting board, and it is possible to reduce the number of inspection personnel. .. Further, in addition to the inspection of the defective condition of the mounting board, it is possible to detect whether the leads of the electronic component are properly inserted into the lead insertion holes of the board.

[Brief description of drawings]

FIG. 1 is a front view of a shortage inspection device according to an embodiment of the present invention.

FIG. 2 is a side view of the shortage inspection device according to the embodiment of the present invention.

FIG. 3A and FIG. 3B are explanatory views showing the inspection state of the embodiment.

FIG. 4 is an explanatory diagram of a substrate reversing unit.

FIG. 5 is an explanatory diagram of an inspection unit.

FIG. 6 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Missing goods inspection device 11 ... Board reversing part 12 ... Inspection part 13 ... Conveying rail 14 ... Mounting board 14B ... Lead insertion hole 36 ... Inspection needle

Claims (1)

[Claims] 1. A board reversing means for reversing a mounting board on which a plurality of electronic components are mounted by inserting a lead into an insertion hole so that a back surface of the board faces upward, and a mounting board reversed by the board reversing means, respectively. A detection unit that lowers the inspection needle that can be inserted into the hole from above and detects whether or not the inspection needle has been inserted into the insertion hole;
A missing item inspection device comprising: