JPH03215758A - Inspection device for packaging printed board - Google Patents

Abstract

PURPOSE:To freely adjust the gap between a pressing pin and the printed board by providing a board fitting base which is moved by an up/down driving means and an elevation adjusting mechanism which adjusts the height position of the board fitting base toward the pressuring pin. CONSTITUTION:The printed board 7 is placed on an inspection base 10 and a rotary handle 12a is rotated to adjust the height of the board 7 finely. Then the up/down driving means 9 is operated to lower the pressure base 2 slowly toward the board 7 in relation with a balancer 3 and a detection switch 11a is turned on to drive a plunger 11b, thereby engaging a hook 11f with the projection part of the pressure base 2. Then the means 9 is operated to elevate the board fitting base 8 and the top surface of the board 7 is pressed against the pressing pin 6a. The terminal legs of electronic component mounted on the board 7 and a circuit pattern are pressed against the inspection pin 10b of the inspection base 10 to measure a voltage and a current at a position with which the pin 10b comes into contact. Thus, the gap between the pin 10b and board 7 can freely be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for inspecting pattern bridging on a printed circuit board on which electronic components are mounted, defects in mounted electronic components, and the like.

(Prior Art) As shown in FIG. 6, a conventional inspection device of this type includes a press base C equipped with a press pin b for pressing a predetermined location of a printed circuit board a toward the bottom surface; A printed circuit board a is placed in a predetermined position facing the press bottle b of the press base C.
It consists of a board mount d on which the board is mounted, and an inspection pin e that contacts the wiring pattern of the printed circuit board a on the board mount d.And by operating an operating member such as a switch,
Either one or both of the press base C and the board mounting base d is raised and lowered by an air cylinder or a hydraulic cylinder f, and the press pin b is placed at a predetermined position on the printed toeboard a, for example, an electronic component mounted on the printed circuit board a. Since the printed circuit board a is pressed against the test pin e by contacting the test pin e, the test pin e comes into contact with the terminal leg of the mounted electronic component or a predetermined wiring pattern position.

In this state, a voltage is applied to the printed circuit board a from a predetermined inspection pin e, and the voltage and current of each part of the printed circuit board a are passed through the detection pin to the inspection circuit incorporating the computer, thereby detecting bridges between patterns and defective parts. This test is to perform the following tests.

[Problem to be solved by the invention]

In such a mounted printed circuit board inspection device, an air cylinder,
A mechanical driving force such as a hydraulic cylinder e is used, and the lifting and lowering is performed by an operator operating an operating member such as a switch that operates these.

By the way, it is desirable that the contact pressure of the test pin e against the printed circuit board a is constant, but since it changes depending on the thickness of the printed circuit board a itself, the gap between the board mounting base d and the pressing base C is constant. Therefore, it becomes necessary to adjust the height position of the board mount d.

The present invention has been made in view of the above points, and its purpose is to adjust the height position of the board mounting base with a simple operation when the type of printed circuit board to be inspected changes. The purpose of the present invention is to provide an inspection device for mounted printed circuit boards that can perform the following tasks.

[Means for Solving the Problems] The mounted printed circuit board inspection device of the present invention aims to achieve the above-mentioned object, and its means move up and down toward the printed circuit board so that the distance between the printed circuit board and the printed circuit board is a press base having a press pin on the surface facing the printed circuit board that stops when a predetermined amount is reached; and an inspection pin on the surface on which the printed circuit board is placed and on which the circuit pattern is formed; The board mount is provided with a board mount that is moved toward the board mount by a vertical drive means, and an elevation adjustment mechanism that is provided between the vertical drive means and the board mount and adjusts the height position of the board mount. .

[For production]

The mounted printed circuit board inspection apparatus of the present invention configured as described above allows the height position of the board mounting base on which the printed circuit board is placed to be easily adjusted by operating the handle, and the height position of the board mounting base on which the printed circuit board is mounted can be easily adjusted, and the height position can be easily adjusted by operating the handle. The gap can be adjusted freely.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mounted printed circuit board inspection apparatus according to the present invention will be described below with reference to FIGS. 1 to 5.

Reference numeral 1 denotes a base frame with two guide balls 1a fixed between the left and right and upper and lower sides of the front, and two guide balls 1b hanging down from the left and right upper parts of the rear, and 2 a press base 2 on the guide balls 1a. 3 is a balancer guided by the guide par 1b so as to be movable up and down. The balancer 3 and the press base 2 are connected by a pair of connecting bands 4 such as chains, and the connecting band 4 is attached to a chain wheel IC rotatably attached to the upper surface of the base frame 1. It is wrapped. Then, the press base 2 and balancer 3
Since the weight of the press base 2 is approximately the same as that of the press base 2,
can be moved up and down with very weak force.

Further, since the balancer 3 is attached with a vertical drive means 5 such as a small diameter air cylinder or a hydraulic cylinder whose one end is attached to the base frame 1, this vertical drive means 5
When the press base 2 is expanded by an operating means (not shown), the press base 2 is lowered, and when it is contracted, the press base 2 is raised.

Reference numeral 6 denotes a pressing plate to which a pressing pin 6a is attached, and is detachably attached to the lower surface of the pressing table 2 described above. The press bottles 6a installed on the press plate 6 have different arrangement relationships depending on the type of printed circuit board 7 to be inspected. Therefore, if the 70 types of printed circuit boards to be inspected are changed, they must be replaced. It is something to do.

Reference numeral 8 denotes a board mounting table which is guided in a vertically movable manner by the guide pole 1a of the base frame 1 described above, and which is moved up and down by a vertical drive means 9 such as an air cylinder or a hydraulic cylinder;
Reference numeral 10 denotes a holding member 10 which is an inspection stand replaceably attached to the board mounting stand 8 and which holds the printed circuit board 7.
Inspection pins 10 are formed and come into contact with terminal legs and wiring patterns of electronic components mounted on the printed circuit board 7.
b is planted. Like the above-mentioned press plate 6, this inspection table IO has a different arrangement depending on the type of printed circuit board 7 to be inspected, and therefore must be replaced when the type of printed circuit board 7 to be inspected is changed. It is.

Reference numeral 11 denotes a locking mechanism that prevents the pressing table 2 from rising when the pressing table 2 has been lowered to a predetermined position;
A detection switch lla that is turned on when the press base 2 is lowered to a predetermined position, a plunger 1lb that is energized when the detection switch lla is turned on, one end of which is pivotally supported by the suction rod 11c of the plunger llb, and the other end is an arm lid pivotally supported by the base frame 1, a connecting lever lie having one end pivotally supported by the suction rod 11c of the plunger, one end being pivotally supported by the other end of the connecting lever lie, and the other end being pivotally supported by the connecting lever lie. and a hook llf pivotally supported by the base frame 1 (see FIG. 4).

In this locking mechanism, when the press base 2 is lowered to a predetermined position, that is, the position 10 to 15 m above the upper surface of the printed circuit board 7, the detection switch 11a is turned on and the suction rod 11C of the plunger llb protrudes. The hook llf is displaced via the connecting lever lie and is engaged with the protrusion 2a of the lowered press base 2, thereby locking the press base 2 so that it does not move upward due to the pressing force from below.

Reference numeral 12 denotes an adjuster for adjusting the height of the substrate mounting base 8. A rotary handle 12a protrudes from the base frame 1 on the side, a worm 12b fixed to the rotary handle 12a, and a worm 12b. It is composed of a meshed wheel 12c and a rotating shaft 12d that rotates in conjunction with the rotation of the wheel 12c and can move freely in the vertical direction, and on which the board mounting base 8 described above is supported. . Also,
Male thread 12 formed at the lower part of this rotating shaft 12d
e is screwed into the female thread 9b of the lifting rod 9a of the vertical drive means 9, and the worm 12b, wheel 12c and rotating shaft 12d are surrounded by a frame 12f, which is Base frame 1 mentioned above
installed on.

Then, when the rotary handle 12a is rotated, the worm 1
2b, and the rotating shaft 12d is rotated via the wheel 12c, so the rotating shaft 12d rises due to the relationship between the male screw 12e and the female screw 9b, so the board mounting base 8 that is pivotally supported on the rotating shaft 12d It moves up and down with respect to the elevating rod 9a according to the amount of rotation of the rotary handle 12a.

Next, to explain the operation based on the above-mentioned diagram, first, after placing the printed circuit board 7 on the inspection table 10, finely adjust the height position of the printed circuit board 7 by rotating the rotary handle 12a. do.

Next, when the vertical drive means 5 is operated to extend, the press base 2 starts to gently descend toward the printed circuit board 7 in relation to the balancer 3, and when it descends to a predetermined position, it comes into contact with the detection switch lla. Then, the detection switch lla is turned on. Therefore, the plunger llb is driven to engage the hook llf with the protrusion 2a of the press base 2. In this state, the pressing pin 6a implanted in the pressing table 2 is fixed at a position of 10 to 15 points on the upper surface of the pudding M board 7.

Next, when the vertical drive stage 9 is operated, the board mounting base 8
rises and presses the top surface of the printed circuit board 7 against the pressing pins 6a. Therefore, the terminal legs and circuit patterns of electronic components mounted on the printed circuit board 7 are
The test pin 10b is pressed against the test pin 10b, and the voltage and current can be measured at the position where the test pin 10b comes into contact with the test pin 10b.

[Effects of the Invention] As described above, in the present invention, the height position of the board mounting base can be adjusted by an external operation using the elevation adjustment mechanism. This has effects such as being able to adjust the gap between the pressing pin and the printed circuit board.

[Brief explanation of drawings]

The figures show an embodiment of the printed circuit board inspection device of the present invention, in which Fig. 1 is a front view, Fig. 2 is a side view, Fig. 3 is a blue side view,
FIG. 4 is an enlarged side view showing the locking mechanism of the press base, FIG. 5 is a partially sectional side view of the elevation adjustment mechanism of the board mounting base, and FIG. 6 is a front view of a conventional example. 2... Pressing table, 3... Balancer, 6... Pressing plate,
6a...Press pin, 7...Printed circuit board, 8...
Board mounting stand, 9... Vertical drive means, 10... Inspection table, lob... Inspection bin, 1l... Lock mechanism, ll
f...Hook, 12...Elevation adjustment mechanism. Patent applicant Fussa Electronics Co., Ltd. Figure 2 Figure 3 Figure 5 Figure 6

Claims (1)

[Claims] A press base having a press pin on the surface facing the printed circuit board that moves up and down toward the printed circuit board and stops when the distance between the printed circuit board and the printed circuit board reaches a predetermined distance, and a circuit pattern on which the printed circuit board is placed. a board mount, which has an inspection pin on a surface formed with an inspection pin, and is moved toward the pressing pin side by a vertical drive means, and a board mount provided between the vertical drive means and the board mount, An inspection device for a mounted printed circuit board, characterized in that it is equipped with a lifting adjustment mechanism for adjusting a height position.