JP2001358499A - Detector for printed-circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detector for a printed-circuit board which can deal with various printed-circuit boards by one kind of a bracket and which can variably adjust their detection positions (X, Y, Z). SOLUTION: A photoelectric sensor 8 which comprises a spherical protrusion in a part of a photoelectric sensor body, a bracket 9 in which a bonding hole 9a to hold a spherical part 8a at the protrusion is formed, a lock bolt 10 which is installed in a position adjacent to the bonding hole 9a and which is used to adjust the detection position of the photoelectric sensor 8, the spherical part 8a which comprises graduations printed in the center of the protrusion and the bracket 9 which comprises graduations printed near the bonding hole 9a, constitute the detector. The bracket 9 of one kind can deal with the various printed-circuit boards. The lock bolt 10 which is attached to the bracket 9 is loosened, the fixation of the spherical part 8a at the photoelectric sensor 8 to the bonding hole 9a of the bracket 9 is released, and the detection positions (X, Y, Z) can be variably adjusted. When spherical-part graduations 8b on the side of the photoelectric sensor body and bonding-hole graduations 9b on the side of the bracket are used, their original detection positions can be reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board transport and positioning unit for mounting equipment, and more particularly to a printed circuit board detector capable of easily and flexibly detecting the positions of various printed circuit boards.

[0002]

2. Description of the Related Art Conventionally, when the position of a printed circuit board is detected according to the shape of the printed circuit board, the position detected by a photoelectric sensor is changed.

Hereinafter, a conventional printed circuit board detector will be described in detail with reference to the drawings. It is to be noted that components having similar functions are denoted by the same reference numerals.

FIG. 2 is an example of a perspective view showing a conventional limited-reflection photoelectric sensor type printed circuit board detector. In FIG. 2, 1 is a printed circuit board, 1a is a notch and a split groove, 1b is a hole for division, 2 is a guide rail of a conveyor, 3 is a conveyor belt, 4 is a belt pulley, 5 is a limited reflection photoelectric sensor, Reference numeral 5a denotes a detection point, and reference numeral 6 denotes a bracket that supports the limited reflection photoelectric sensor.

The operation of the printed circuit board detector configured as described above will be described below. The printed circuit board 1 is conveyed on the upper surface of a conveyor belt 3 attached to a guide rail 2 opposed to the conveyor, reaches the detection point 5a of the limited reflection type photoelectric sensor 5, and at the tip of the printed circuit board 1. By reflecting light,
The limited reflection type photoelectric sensor 5 operates to stop the transport motor.

FIG. 3 is an example of a perspective view showing a conventional wide-beam diffuse reflection photoelectric sensor type printed circuit board detector. In FIG. 3, FIG. 2 showing a conventional example is 1, 1a, 1
Reference numerals b, 2, 3, 4, and 6 denote the same components, 7 denotes a wide beam diffuse reflection type photoelectric sensor, and 7a denotes a detection area. The operation of the printed circuit board detector configured as described above will be described below.

The printed circuit board 1 is conveyed on the upper surface of a conveying belt 3 attached to a guide rail 2 facing the conveying conveyor, reaches a detection area 7a of a wide beam diffuse reflection type photoelectric sensor 7, and receives the printed circuit board. When the light is reflected at the front end of the light-emitting device 1, the wide-beam diffuse reflection photoelectric sensor 7 is activated, and the transport motor is stopped.

[0008]

In such a conventional printed circuit board detector, when a limited reflection type photoelectric sensor is used, when a notch or a groove of the printed circuit board reaches a detection point, the limited reflection type photoelectric sensor is used. Since the light emitted from the photoelectric sensor is not reflected by the printed circuit board, the limited reflection photoelectric sensor does not operate and the transport motor cannot be stopped, so that the printed circuit board cannot be stopped at a specified position. The same applies to the case of using the wide-beam diffuse reflection type photoelectric sensor, which has the same problem as the case of using the limited reflection type photoelectric sensor. At present, to solve the above problems,
When changing the detection position, prepare several types of brackets of different dimensions to support these photoelectric sensors, or adjust the bracket position by loosening a plurality of adjustment bolts.
Although the replacement and position change are performed according to each printed circuit board, it takes a long time to manufacture, replace, and attach the bracket, and the work is very difficult.

An object of the present invention is to provide a printed circuit board detector capable of variably adjusting the detection position of a photoelectric sensor with respect to various printed circuit boards using one kind of bracket.

[0010]

In order to achieve this object, a printed circuit board detector according to the present invention comprises a photoelectric sensor having a spherical projection on a part of a photoelectric sensor body; A bracket provided with a joint hole for holding a portion, a lock bolt for adjusting a detection position of the photoelectric sensor provided at a position close to the joint hole, and a scale printed at the center of the protrusion. And a bracket having a scale printed near the joint hole.

[0011]

FIG. 1 is a block diagram showing an embodiment of the present invention.
It will be described based on. It is to be noted that components having the same functions as those of the conventional example are denoted by the same reference numerals and described.

FIG. 1 is a perspective view showing a printed board detector according to the present invention. In FIG. 1, 1 is a printed circuit board, 1a
Is a notch and a groove, 1b is a hole for division, 2 is a guide rail of a conveyor, 3 is a conveyor belt, 4 is a belt pulley, 8 is a photoelectric sensor, 8a is a spherical part, 8b is a spherical part scale, and 8c is a spherical part scale. The detection area, 9 is a bracket, 9a is a joint hole, 9b is a joint hole scale, and 10 is a lock bolt.

The operation of the printed circuit board detector configured as described above will be described below. The printed circuit board 1 is transported on the upper surface of the transport belt 3 attached to the guide rail 2 facing the transport conveyor, reaches the detection area 8c of the photoelectric sensor 8, and the light is reflected at the tip of the printed substrate 1. As a result, the photoelectric sensor 8 operates to stop the transport motor.

When the notch and the groove 1a of the printed circuit board 1 reach the detection area 8c of the photoelectric sensor 8 when the photoelectric sensor does not operate, the lock bolt 10 is loosened and joined to the spherical portion 8a. By releasing the fixing of the hole 9a, the detection position of the photoelectric sensor is variably adjusted so that the hole can be slid to any of the detection positions (X, Y, Z).
After determining the detection position, the lock bolt 10 is tightened and fixed. When reproducing at the original detection position, the detection position can be reproduced by using the spherical scale 8b on the photoelectric sensor main body side and the joint hole scale 9b on the bracket side.

[0015]

As described above, according to the printed circuit board detector of the present invention, the lock bolt attached to the bracket portion is loosened with respect to various printed circuit boards using one kind of bracket, and the spherical surface on the photoelectric sensor main body is loosened. By releasing the fixing between the part and the joint hole in the bracket, the detection position of the photoelectric sensor can be variably adjusted so that it can slide to any of the detection positions (X, Y, Z), and the detection position can be adjusted by tightening the lock bolt. Can be fixed. Further, it is possible to reduce the time and effort for manufacturing, replacing, and mounting several types of brackets having changed dimensions for supporting the photoelectric sensor, and to hold the spherical portion of the protrusion provided on the photoelectric sensor body and the spherical portion. By using the scale printed near the joint hole of the bracket provided in the above, it is possible to realize a printed board detector capable of positioning the detection position and reproducing the original detection position.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a printed circuit board detector of the present invention.

FIG. 2 is an example of a perspective view showing a conventional reflection type photoelectric sensor type printed circuit board detector.

FIG. 3 is an example of a perspective view showing a conventional wide-beam diffuse reflection photoelectric sensor type printed circuit board detector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 1a Notch and split groove 1b Dividing hole 2 Guide rail 3 Conveying belt 4 Belt pulley 5 Limited reflection photoelectric sensor 5a Detection point 6 Bracket 7 Wide light beam diffuse reflection photoelectric sensor 7a Detection area 8 Photoelectric sensor 8a Spherical surface Part 8b Spherical part scale 8c Detection area 9 Bracket 9a Joint hole 9b Joint hole scale 10 Lock bolt

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masato Tanino 1006 Kadoma, Kadoma, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (reference) 5E313 AA11 CC04 FF14

Claims (1)

[Claims] 1. A photoelectric sensor having a spherical projection on a part of a photoelectric sensor main body, a bracket provided with a joining hole for holding a spherical portion of the projection, and a bracket provided at a position close to the joining hole. A lock bolt for adjusting the detection position of the provided photoelectric sensor, a spherical portion having a scale printed at the center of the protrusion, and a bracket having a scale printed near the joint hole. Printed circuit board detector.