JP3511865B2 - Pallet inspection equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet inspection device for mounting a substrate when automatically inserting electronic components used in electronic equipment, solder mounting, and product assembly.

[0002]

2. Description of the Related Art A conventional pallet inspection will be described below.

In the conventional pallet inspection, an inspector 3 visually inspects the positioning pins 2 erected on the pallet 1 as shown in FIG. Alternatively, as shown in FIG. 6, a gauge 4 corresponding to the positioning pin 2 provided upright on the pallet 1 was used. The gauge 4 is provided with a hole 5. This hole 5 is provided at a position corresponding to the positioning pin 2 of the pallet 1. Then, by lowering the gauge 4 in the direction A indicated by the arrow, the positioning pin 2 moves into the hole 5
The quality of the pallet 1 is inspected depending on whether or not the pallet is fitted. In any case, the inspector 3 was inspecting.

[0004]

However, in such a conventional configuration, since the inspector 3 inspects the position of the positioning pin 2 provided on the pallet 1, much time is required and Since the inspection accuracy is poor and the discovery of defective pallets is delayed, there is a problem in that defective products often occur due to defective pallets.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a pallet inspection device for inspecting pallet inspection work quickly and accurately.

[0006]

In order to achieve this object, a pallet inspection apparatus of the present invention comprises a laser beam from a laser sensor to a positioning pin erected on the pallet, at a plurality of predetermined positions. Is emitted, and the distance from the positioning pin is measured by the reflection of the laser light, and the quality of the pallet is determined by whether the value is within a predetermined range. As a result, the inspection work can be speeded up and the accuracy can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is connected to a mounting table for a pallet to be inspected, a laser sensor provided in front of this mounting table, and an output of this laser sensor. The control means is provided, from the laser sensor toward the positioning pin erected on the pallet,
Laser light is emitted to a plurality of predetermined positions, the distance from the positioning pin is measured by the reflection of the laser light, and whether or not the value is within a predetermined range determines whether the pallet is good or bad. Since it is a pallet inspection device that determines whether or not the distance to the positioning pin is measured by laser light, the inspection speed can be increased and the inspection accuracy can be improved.

In the pallet inspection device according to claim 1, the laser beam of the invention described in claim 2 measures the center of the positioning pin when the reference pallet is placed and three positions at both ends thereof. Therefore, the standing state of the positioning pin can be accurately inspected with the minimum number of laser beams.

According to a third aspect of the present invention, one laser sensor is moved by the output from the driving means connected to the control means to emit laser light to a plurality of predetermined positions. According to the pallet inspection device described in (1), a single laser sensor can measure a plurality of positions. Therefore, the price of equipment can be reduced.

The invention according to claim 4 is the pallet inspection device according to claim 3 in which a number of laser sensors corresponding to the number of positioning pins erected on the pallet are provided, which corresponds to the number of positioning pins. Since it has a laser sensor,
It can be inspected at high speed.

A fifth aspect of the present invention is the pallet inspection device according to the fourth aspect, wherein the laser sensor is movable in the horizontal direction with respect to the pallet, and the position of the positioning pin of the pallet is changed in the horizontal direction. However, we can respond flexibly.

The invention according to claim 6 is the pallet inspection device according to claim 5, wherein the laser sensor is movable in the front-rear direction with respect to the pallet, and the position of the positioning pin of the pallet changes in the front-rear direction. However, it can respond flexibly.

According to a seventh aspect of the present invention, a conveyor for conveying pallets, a pallet raising / lowering means provided in the middle of the conveyor, a laser sensor provided above the conveyor, and a rear side of the laser sensor. The pallet inspection apparatus according to claim 6, further comprising a pallet stock rail provided in the pallet, wherein the pallets to be inspected can be sequentially conveyed by a conveyor and automatically inspected.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 and FIG. 3, 11 is a mounting table on which the pallet 19 is mounted. A laser sensor 12 is provided in front of the mounting table 11. The output of the laser sensor 12 is connected to the control means 13. Further, a driving means 14 is connected to the control means 13, and the laser sensor 12 is output by the driving means 14.
Are moved in the horizontal direction or the front-back direction with respect to the pallet 19. Reference numeral 15 is a belt conveyor that conveys the pallet 19. In the middle of the belt conveyor 15, pallet raising / lowering means 1 for moving the pallet 19 up and down.
7 is provided. Above the belt conveyor 15,
A defective pallet stock rail 18 is provided. At this position, that is, as shown in FIG. 4, the pallet 19 mounted on the mounting table 11 stops in front of the laser sensor 12,
The pallet 19 is inspected. At this time, pallet 1
The locking convex portion 31 is fitted into the V-shaped concave portion 30 provided on the plate 9 to fix the distance between the pallet 19 and the laser sensor 12 to a precisely determined value.

An outline of the operation of the pallet inspection device configured as described above will be described below. The pallet 19 is conveyed on the belt conveyor 15 which conveys the pallet 19. The pallet 19 is mounted on the mounting table 11 and lifted. Therefore, the position of the positioning pin 20 provided on the pallet 19 of the pallet 19 is precisely measured by the light from the laser sensor 12, and the result is determined by the control means 13. If the determination result is non-defective, the pallet raising / lowering means 17 descends again, and the pallet raising / lowering means 17 returns the belt to the belt conveyor 15 and conveys it in the OK direction. When the determination result of the control means 13 is determined to be defective, the pallet 19 remains as it is and the conveyor 1
N of the pallet stock rail 18 provided above
It is conveyed in the G direction.

In FIG. 1, a pallet 19 is placed on the placing table 11. 20 is a positioning pin provided on the pallet 19. This positioning pin 20
It is provided at both ends of the pallet 19. Two laser sensors 12 are provided in front of both ends. Since the laser sensor 12 can be moved in the horizontal direction by the pulse motor 21, even a pallet of a type in which the position of the positioning pin 20 in the horizontal direction is different can be dealt with. Further, since the pulse motor 22 can move the laser sensor 12 in the front-rear direction, even a pallet of a type in which the position of the positioning pin 20 in the front-rear direction is different can be dealt with.

FIG. 2A is a sectional view of the positioning pin 20 seen from the upper surface. First, the degree of verticality of the light from the sensor of the laser sensor 12 is checked at the center 23 of the positioning pin 20 and the positions of both sides 24 and 25 at a distance of 0.4 mm. In this case, in FIG. 2A, 24 and 25 are 24a,
25a has the same value (0.12 mm), and is detected 0.12 mm longer than 23a (0 mm) in the center 23, which is a reference good product. On the other hand, FIG. 2B shows a state in which the positioning pin 20 is displaced in the B direction. At this time, since it is displaced in the B direction, the center 23
The position 23a in the front-back direction is 0.1 mm compared to the reference. That is, the positioning pin 20 is 0.1 mm in the B direction.
It indicates that they are displaced. In addition, FIG.
Shows a state in which the positioning pin 20 is displaced in the C direction.
At this time, since it is displaced in the C direction, the position 23b in the left-right direction of the center 23 is 0.1 mm compared with the reference. That is, it indicates that the positioning pin 20 is displaced by 0.1 mm in the C direction. As a result, in FIGS. 2B and 2C, it can be determined that the present embodiment is defective. In addition, good product is 0.1m in the front-back direction 23a.
Within m, the horizontal direction 23b is within 0.1 mm.

[0018]

As described above, according to the present invention, a mounting table for a pallet to be inspected, a laser sensor provided in front of the mounting table, and control means connected to the output of the laser sensor. Comprises, from the laser sensor toward the positioning pin erected on the pallet, emits a laser beam to a plurality of predetermined positions, by the reflection of the laser beam, to measure the distance to the positioning pin, The quality of the pallet is determined based on whether or not the value is within a predetermined range, and the pallet can be inspected with high accuracy in a short time as compared with the inspection by a human. Therefore, it is possible to prevent the occurrence of defects when performing automatic mounting, automatic insertion, automatic assembly, etc. using a pallet.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a pallet inspection device according to an embodiment of the present invention.

2A is a sectional view of a positioning pin in a pallet inspection device when the positioning pin is non-defective, and FIG. 2C is a sectional view of the positioning pin when tilted in the front-rear direction. Sectional view when tilted horizontally

FIG. 3 is a side view of the pallet inspection device.

FIG. 4 is a plan view of the same.

FIG. 5 is a perspective view of a conventional pallet inspection method.

FIG. 6 is a perspective view of a conventional method of inspecting a pallet using a gauge.

[Explanation of symbols]

11 table 12 Laser sensor 13 Control means 19 pallets 20 Positioning pin

Claims (7)

(57) [Claims] 1. A mounting table for a pallet to be inspected, a laser sensor provided in front of the mounting table, and control means connected to the output of the laser sensor. Laser light is emitted to a plurality of predetermined positions toward the standing positioning pin, the distance from the positioning pin is measured by the reflection of this laser light, and the value is within a predetermined range. A pallet inspection device that determines the quality of the pallet based on whether or not it is present. 2. The pallet inspection device according to claim 1, wherein the laser light measures the center of the positioning pin when a reference pallet is placed and three positions on both sides of the center. 3. A laser beam is emitted to a plurality of predetermined positions by moving one laser sensor with an output from a driving means connected to the control means.
Inspection device for pallets. 4. The pallet inspection device according to claim 3, wherein a number of laser sensors corresponding to the positioning pins provided upright on the pallet are provided. 5. The pallet inspection device according to claim 4, wherein the laser sensor is movable in the horizontal direction with respect to the pallet. 6. The pallet inspection device according to claim 5, wherein the laser sensor is movable in the front-rear direction with respect to the pallet. 7. A conveyor for conveying a pallet, a pallet raising / lowering means provided in the middle of the conveyor, a laser sensor provided above the conveyor, and a pallet stock provided behind the laser sensor. The pallet inspection device according to claim 6, further comprising a rail.