JPS59163501A - Detection of hole position - Google Patents

Abstract

PURPOSE:To enable easy detection of a hole position by using an inexpensive detecting mechanism having a simple construction by moving a pin having the diameter at which the pin fits into the hole without clattering on a reference line of an object to be detected and detecting the fall of the pin into the hole when the pin moves to the position facing the hole. CONSTITUTION:A pin 2 has the diameter at which the pin fits into a hole 4 without clattering. Said pin is fitted into a guide hole 5 which is provided to a pin holder 3 and has approximately the same diameter as the diameter of the hole 4. The pin 2 held in the holder 3 is set on a part 1 to be assembled so as to be positioned on a reference line having the center past the center of the hole 4 and extending in a lateral direction. The holder 3 is moved toward the right from said position. When the holder 3 moves by a distance (a), the pin 2 faces the hole 4 and falls into the hole 4. The head part 6 of the pin 2 contacts with a pressure sensor 7, then the sensor 7 trasmits a detection signal. The position of the hole 4 is known by reading the extent of the movement of the holder 3 from the reference position.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a hole position detection method capable of accurately detecting the position of a hole formed in an object such that the center is located on a reference line extending in a certain direction. It is something.

Conventional technology and problems Conventionally, to detect the position of a hole in this type of object, a method has been adopted that uses a camera etc. to recognize the absolute position of the hole. The disadvantage was that it was large and complicated and expensive.

OBJECTS OF THE INVENTION The present invention is intended to solve the above-mentioned drawbacks, and it is an object of the present invention to provide a hole position detection method that can easily detect hole positions using a detection mechanism that is simple in structure and inexpensive. .

Structure of the Invention In order to achieve this object, the present invention uses a bottle having a diameter that fits without looseness into a hole K formed in the object so that the center is located on a reference line extending in a certain direction. The position of the hole is detected by moving the object on the reference line and detecting the fall of the bottle into the hole when the bottle moves to a position facing the hole.

Examples of the invention The invention will now be described in detail in conjunction with the drawings.

As described above, even if the position of the hole formed in the part to be assembled (object) is uncertain, the center of the hole is located on the reference line extending in a certain direction. The hole position is detected using a certain fact. Next, the principle of hole position detection will be explained with reference to FIG.

In FIG. 1, 1 is a part to be assembled, 2 is a bottle, and 3 is a pin holder. The part to be assembled 1 is provided with a hole 4.

The bottle 2 has a diameter that allows it to fit into the hole 4 without rattling, and fits into a guide hole 5 that has approximately the same diameter as the hole 4 provided in the bottle holder 3. At the periphery of the guide hole 5 of the bottle holder 3,
A pressure sensor 7 is attached to detect contact of the head 6 of the bottle 2.

When detecting the position of the hole 4, first, as shown in FIG. The bottle holder 3 is set on the assembly target part 1 so as to be located at , and the bottle holder 3 is moved to the right from this position. When the bottle holder 3 moves by a distance a, the bottle 2 faces the hole 4 and falls into the hole 4 as shown in FIG. 1(b), and the head 6 of the bottle 2 becomes the pressure sensor. 7, the pressure sensor 7 sends out a detection signal. That is, it can be known that the center of the bottle 2 coincides with the center of the hole 4. The position of this hole 4 is
This can be determined by reading the amount of movement of the pin holder 30 from the reference position.

FIG. 2 shows an example of application of the present invention.

In this example, a plurality of disks are installed in a motor in a magnetic disk device, and 11 is a motor attached to a base 12, 13 is a disk, 14 is a spacer, and 15 is a clamp. A disk 13 incorporated into the motor 11. The spacer 14 connects the motor 11 with a screw 17 inserted into a screw insertion hole 16 formed in the clamp 15.
It is fixed by screwing it into the screw hole 18 on the side and tightening it. The screw insertion holes 16 and the screw holes 18 are formed at equal intervals on the circumference of the circle-radius, but when the above-mentioned fixing with the screws 17 is automatically performed, these holes 16
, 18 must be precisely opposed. This can be easily achieved by applying the above principles. That is, by applying the above principle, the motor 11
Detect the position of the screw hole 18 on the side and attach the clamp 1 to this position.
It is sufficient if the screw insertion holes 16 of No. 5 are aligned.

To detect the position of the screw hole 18, set the bottle held in the bottle holder so that its center is located at a point on the circumferential reference line passing through the center of the screw hole 18, and then remove the bottle holder from this position. This can be done by rotating the bottle so that it moves on the reference line. In this case, the diameter of the bottle may be such that it fits into the thread root diameter of the screw hole 18 without play.
By detecting that the bottle falls into the screw hole 18, the hole position can be known.

A detection mechanism such as a bottle or a bottle holder has a simple and inexpensive structure, and the hole position can be easily detected using this detection mechanism. Since this detection mechanism can be easily attached to the parts gripping part of the automatic machine that assembles the device, automation that would otherwise be divided into several processes (requiring several automatic machines) can be integrated into one process. (The automatic machine is 1
It can be done on a stand.

Effects of the Invention As described above, according to the present invention, the following various excellent effects can be achieved.

(1) It is possible to easily and accurately detect the position of a hole in an object whose center is located on a reference line extending in a certain direction.

(2) The detection mechanism required for detecting the hole position has a simple structure and is inexpensive.

(3) If the present invention is applied to an automatic machine for assembling equipment, automation that conventionally had to be divided into several processes can be integrated into one process.

[Brief explanation of drawings]

The drawings show an embodiment of the hole position detection method according to the present invention, and FIGS. 1(a) and (b) are diagrams explaining the principle of hole position detection, and FIG. 2 is an exploded perspective view showing an example of application. . In the figure, 1.1 is the part to be assembled (object), 2 is the bottle, and 3
is a bottle holder, 4 is a hole, 7 is a pressure sensor, 1 is a motor, 1 is a base, 13 is a disk, 14 is a spacer, 15
1 is a clamp, 16 is a screw insertion hole, 17 is a screw, and 18 is a screw hole.

Claims (1)

[Claims] In a method for detecting the position of a hole formed in a target object so that the center is located on a reference line extending in a certain direction, a bottle having a diameter that fits into the hole without rattling is moved on the reference line of the target object. A method for detecting a hole position, characterized in that the hole position is detected by detecting the drop of the bottle into the hole when the bottle moves to a position facing the hole.