JPH03194405A - Detecting method for size and position of hole - Google Patents

Abstract

PURPOSE:To reduce the size of a insertion hole and to miniaturize a position detecting device by judging whether or not a bolt, etc., are inserted and whether or not the relative positions of the holes, bolt, etc., need to be corrected by plural sensors. CONSTITUTION:When the centers of insertion holes 16 and 17 bored in plate type members 14 and 15 are aligned with each other, and the fitting centers of transmission type photoelectric sensors 1 and 2 are aligned with the centers of the holes 16 and 17, the optical axes 3 of the sensors 1 and 2 penetrate the holes 16 and 17 and the sensors 1 and 2 detect whether or not the bolt, etc., is inserted and whether the relative positions of the holes 16 and 17 and the bolt, etc., need to be corrected. Further, when the fitting centers of the sensors 1 and 2 are not aligned with the centers of the holes 16 and 17, the sensors detect whether or not the bolt is inserted and whether or not the relative positions of the holes and bolt, etc., need to be corrected if the optical axes 3 of the left-side sensors penetrate the holes 16 and 17 and the optical axes 3 of the right-side sensors do not penetrate the holes 16 and 17. Further, when the centers of the holes 16 and 17 are not aligned with each other, the sensors detect whether the bolt is inserted or not and whether the relative positions need to be corrected or not.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for detecting the size and position of an insertion hole for a bolt or the like formed in a plate-like member.

(Prior Art) When inserting a bolt or pin into an insertion hole drilled in a plate-shaped member, the size and position of the insertion hole are visually confirmed. Also, if the area around the insertion hole is narrow.

The insertion hole was checked by feeling. Furthermore, if the environment around the insertion hole is poor and the size and position of the insertion hole cannot be confirmed visually or by groping, a television camera is used.

(Problem to be Solved by the Invention) When detecting the size and position of the insertion hole for bolts etc. using a television camera as described above, the detection device for detecting the size and position of the insertion hole is a television camera drive mechanism. and a control device to control it, making the entire detection device complicated.

When the size is large and the insertion hole is in a narrow place.

I can not use it. Also, since the entire detection device becomes larger,
There is a problem in that it is difficult to incorporate the bolt/nut fastening device into a bolt/nut fastening device that automatically fastens bolts/nuts.

The present invention has been proposed in view of the above-mentioned problems, and its purpose is to provide a method for detecting the size and position of holes for inserting bolts, etc., which can miniaturize the size and position detection device. It is in the point of doing.

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a method for detecting the size and position of a hole drilled in a plate-like member for inserting a bolt, etc. Multiple transmission-type photoelectric sensors placed on a virtual circle with a diameter slightly larger than the outside diameter determine whether a bolt, etc. can be inserted into the insertion hole, and whether or not the relative position between the insertion hole and the bolt, etc. needs to be corrected. Characterized by judgment.

(Function) The hole size and position detection method of the present invention is configured as described above, and uses a plurality of transmission type photoelectric sensors arranged on a virtual circle with a diameter slightly larger than the outer diameter of the bolt, etc. ,
Determine whether or not a bolt, etc. can be inserted into the insertion hole, and whether or not the hole position needs to be corrected, and if the bolt, etc. can be inserted, and the relative position between the insertion hole and the bolt, etc. cannot be corrected, the bolt, etc. is inserted into the insertion hole. insert.

(Example) Next, a detection device used to carry out the hole size and position detection method of the present invention is shown in FIGS. 1 to 4. In Figure 1 (
1) is a transmission type photoelectric sensor on the light emitting side.

(2) is the transmission type photoelectric sensor on the light receiving side, and as shown in Figure 2.3, the optical axis (3) of the transmission type photoelectric sensor (1) (2) is
) are arranged on an imaginary circle that is slightly larger than the diameter (D) of the bolt, etc. The number of transmission type photoelectric sensors (1) and (2) is eight in the case of five embodiments.

There is no problem with increasing or decreasing the amount. Further, (4) and (5) are sensor mounting tools that support the transmission type photoelectric sensors (1) and (2). Note that in this example, a transmission type photoelectric sensor (1
) A screw is carved on the outer periphery of (2), which is screwed into the threaded hole of the sensor mount (4) (5) and tightened with a nut. On the other hand, a bolt/nut fastening device usually consists of a bolt holder (7) that holds the bolt, and a nut holder (8) that holds and tightens the nut.

The nut holder body (9) is rotatably supported by a bearing (10), and a power transmission means such as a gear (11) is provided on the outer periphery of the nut holder to obtain rotational force for tightening the nut. . Each of the sensor fixtures (4) (5) supporting the transmission type photoelectric sensors (1) (2) is fixed so as to be aligned with the center of the bolt holder (7) and the nut holder (8). ing. Note that (12) and (13) are sensor cables, and the sensor cables (12) and (13) are connected to a signal processing device (not shown). Also (1
4) (15) is a plate-like member, (16) and (17) are insertion holes for bolts, bottles, etc., drilled in the same plate-like members (14) and (15).

Next, the operation of the detection device shown in FIGS. 1.2.3 will be explained in detail with reference to FIG. 4.

Figure 4 (1) shows that the centers of the insertion holes (16) and (17) bored in the plate members (14) and (15) coincide, and that the mounting centers of each transmission type photoelectric sensor (1) and (2) are aligned. is aligned with the center of the insertion holes (16) and (17), and at this time, all transmission type photoelectric sensors (1)
The optical axis (3) of (2) passes through the insertion holes (16) and (17) (see black circles), allowing the insertion of bolts, etc.
) (17) and whether or not the relative position of the bolt etc. has been corrected is detected by the transmission type photoelectric sensors (1) and (2).

In Fig. 4(n), the centers of the insertion holes (16) and (17) drilled in the plate members (14) and (15) coincide, but
The mounting center of each transmission type photoelectric sensor C1) (2) is not aligned with the center of the insertion hole (16) (17). The optical axis (3) of 2) (see black circle) is the insertion hole (
16) (17), and the optical axes (3) of the remaining right side multiple transmission-type photoelectric sensors (1) (2) are inserted into the insertion hole <16
) (17) (see white circle), the transmission type photoelectric sensor (1) (2) detects the need to correct the relative position of the bolt insertion base, insertion hole (16) (17), and bolt, etc. Ru.

FIG. 4 (III) shows a state in which the centers of the insertion holes (16) (17) bored in the plate members (14) (15) do not coincide, and in this case, the upper and lower transmission type photoelectric The optical axes (3) (see black circles) of the sensors (1) (2) pass through the insertion holes (16) (17), and the optical axes of the remaining left and right transmissive photoelectric sensors (1) (2) pass through the insertion holes (16) and (17). (3) is the insertion hole (
16) The transmission type photoelectric sensor (1) (2) detects the need to correct the relative position of the bolt insertion stand, insertion hole (16), (17), and bolt, etc. without passing through (17) (see white circle). be done.

(Effects of the Invention) As described above, the hole size and position detection method of the present invention uses a plurality of transmissive photoelectric sensors arranged on a virtual circle with a diameter slightly larger than the outer diameter of the bolt, etc. Determine whether or not a bolt etc. can be inserted into the insertion hole, and whether or not the hole position needs to be corrected.
Bolts etc. can be inserted.

In the case of a relative position correction table between the insertion hole and the bolt, etc., the bolt, etc. is inserted into the insertion hole, so compared to the case where the size and position of the insertion hole, such as the bolt, is detected by a TV camera.
This has the effect of making the detection device smaller.

[Brief explanation of drawings]

FIG. 1 is a vertical side view showing an example of the configuration of a detection device used to implement the hole size and position detection method according to the present invention, and FIG. 2 is a vertical front view taken along the arrow ■-■ line in FIG. Figures 3 and 3 are longitudinal sectional front views taken along the arrow l-ll1 line in Figure 1, and Figures 4 (1) to (I[I) are explanatory views of the operation thereof. (1)... Transmissive photoelectric sensor on the light emitting side, (2)...
Transmissive photoelectric sensor on the light receiving side, (3)...Optical axis of the transmissive photoelectric sensor (1) (2), (14) (15)
...Plate member. (16)...Insertion hole for plate member (14), (17)
...Insertion hole of plate-shaped member (15), (D) ...Diameter of virtual circle.

Claims (1)

[Claims] To detect the size and position of a hole drilled in a plate-shaped member for inserting a bolt, etc., multiple transmission-type photoelectric sensors are arranged on a virtual circle with a diameter slightly larger than the outer diameter of the bolt, etc. A method for detecting the size and position of a hole, characterized by determining whether or not a bolt or the like can be inserted into the insertion hole, and whether or not it is necessary to correct the relative position between the insertion hole and the bolt or the like.