JPS5934506A - Reflection mirror fitting method of photoelectric switch - Google Patents

Abstract

PURPOSE:To eliminate a position shift of a reflection mirror and to improve the detection precision of an article by extending an elastic cord member between both side parts of the reflection mirror in a bundled shape while the reflection mirror is inserted between a detaining members for specifying its fitting position, and clamping and holding the elastic member on the rear surface of a fitting member through a detaining hole formed therein. CONSTITUTION:The reflection mirror 7 is fitted to the surface of the fitting plate 6 and inserted from above and below between lock members fitted in fitting holes 9 for detaining member, and the fitting position of the reflection mirror 7 is specified. Further, a rubber band 11 of fluororubber as the elastic cord member is extended between both side parts of the reflection mirror 7 and said rubber band 11 is tightened up on the rear surface of the fitting plate 6 through a detaining hole 8 in the bundle to press both end parts of the rubber band 11 by a retaining member 12, holding the rubber band 11 fixedly. After the rubber band is fixed, its unnecessary end parts are cut. Further, the edge parts of the detaining hole 8 contacting the rubber band 11 is chambered.

Description

DETAILED DESCRIPTION OF THE INVENTION Misfiring #y4 relates to a method for attaching the reflecting mirror in a photoelectric switch using a reflecting mirror that changes the amount of optical axis force.

A reflective photoelectric switch is a device that detects the presence of an article. This is used, for example, to use a computer system to check the presence or absence of an item and its status when storing the item in an unmanned warehouse or the like. One type of the above-mentioned reflective photoelectric switch is one that projects light onto a reflective plate through the storage position of the item, moves the projected light, and detects the presence or absence of the item and its amount based on the presence or absence of the reflected light. There is.

For example, the structure of the above-mentioned reflective photoelectric switch is shown below. As shown in Figure 7, (1) is the light emitting/receiving section installed inside the reflective photoelectric switch, which is a light emitting diode, etc. A floodlight that emits light using a light-emitting element, and this! It has a structure consisting of a light receiver that receives the reflected light of the light projected from the iA light projector using a light receiving element such as a phototransistor. (
2) is a reflective plate placed behind the article (3). (
Reference numeral 4) is a fixed reflecting mirror comprised of nine reflecting mirrors disposed opposite to each other on the optical axis of the light projecting/receiving section (1), and reflects the light projected by the light projector inside the light projecting/receiving section 10 vertically downward. (Il+ is a movable reflecting mirror that is disposed vertically below the fixed reflecting mirror (4) and opposite to it, and is installed so as to move up and down continuously by a predetermined interval in the vertical direction.

Therefore, with the above configuration, the light emitted from the projector inside the light receiving section 11) is reflected by the fixed reflecting mirror (41) to the vertical lower blade, and is again reflected in the horizontal direction by the movable reflecting mirror (5). The emitted light is projected and scanned by a predetermined vertical interval by the movement of the movable reflector (5).There is an object to be detected (3) on the optical path of the light reflected by the movable reflector (5). If there is, the light that has reached the surface of the article (3) will not be reflected, but if the article (3) is not on the optical path, the light reflected by the moving mirror (6) will be reflected by the reflector ( 2), is reflected again by the moving reflector (5) and the fixed reflector 1k1f41, and is detected by the light receiver inside the light projecting/receiving unit ill.Here, the above-mentioned fixed reflector (
4) And move! The installation state of the 1IIJ reflector (5) is as follows:
This is so important that it affects the degree of detection of item 3), and therefore, a mounting method is required to accurately mount the fixed reflector +41 and the movable reflector (5) inside the photoelectric switch.

Conventionally, the method for mounting a reflector in a reflective type optical switch is to attach the reflector to a predetermined position inside the photoelectric switch using a screw or the like, or to clamp the reflector using a hanging member. There was a way to keep it fixed.

However, in the conventional attachment force method described above, the attachment condition of the reflector is often incomplete, which may cause the reflector to shift in position. Seediness was sometimes significantly reduced.

In addition, the structure was complicated, and installation was often done by rotating the magnet.

The present invention has been made in view of the above-mentioned conventional problems and has solved the problem, by installing a locking member on the mounting member for regulating the mounting position of the reflecting mirror, and holding the reflecting mirror between the resting members. A photoelectric switch is provided in which a string-like elastic member is hung on both sides of the reflecting mirror, and the elastic member is tightened and held on the back side of the mounting member through a locking hole formed in the mounting member. Provides a reflector mounting force method for

Embodiments of the present invention will be explained below based on the drawings.As shown in FIG.
] and the movable reflecting mirror (5) are attached to a mounting plate fat which is a mounting member.
;The mounting plate of the fixed reflector (4) is held in place by the sl (
6) is attached to the optical receiver ill, and the mounting plate 81 of the movable reflecting mirror (6) is attached to a part of the drive section (not shown).

The above mounting plate (the method for mounting the reflector to 61 is shown below)
■ In Figure 3, (8) is the mounting plate which is the mounting member, (7)
is a triangular prism-shaped reflecting mirror, such as a surface reflecting mirror with a metal reflective film deposited on its surface or a right-angle prism. (8) is a rest hole for fixing and holding the reflecting mirror (7) on the mounting plate (6), and the reflecting mirror (7) is located in the vertical direction on both sides of the reflecting mirror (7).
The width and width of the hole are also formed at a slightly narrow position. (9) is a locking member mounting hole, which is formed at a position slightly wider than the width of the reflecting mirror (7) in the vertical direction inside the locking hole (8). As shown in Figure V, the reflector (7) is attached to the surface of the mounting plate fi11 lCV! the resting member fitted into the locking member mounting hole (9).
Hold the reflector (7) from the upper and lower blade directions and reflect it! Regulates the mounting position of +71. In addition, fluorine-based rubber bands (I
Tighten and press the rubber band (II) Th on the back side of the mounting plate (6) through the locking hole (8), then press both ends of the rubber band (11) with the ts material (L) to Hold the rubber band in place. After fixing the rubber band, cut off the unnecessary part of the end. Also, hold the rubber band (
The edge of the resting hole (8) that comes into contact with the rest hole (8) is chamfered.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but a protruding member such as a hook may be formed on the surface of the mounting plate (6) as a locking member for regulating the mounting position of the reflecting mirror (7). Good too. Further, a ring-shaped rubber band may be used as the elastic member. Furthermore, the shape of the reflecting mirror may be a prismatic shape other than the above embodiment.◇ As explained above, according to the present invention, the mounting state of the reflecting mirror is perfect, thereby preventing the misalignment of the reflecting mirror. Therefore, the detection accuracy of the article in the reflective photoelectric switch is dramatically improved. Furthermore, since the mounting force method is simple, the mounting can be easily performed.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram showing the structure of a reflective photoelectric switch, Fig. 2 is a schematic explanatory diagram showing a reflective photoelectric switch according to an actual gun example of the present invention, and Fig. 3 is an embodiment of the present invention. FIG. 7 is a front view showing the mounting member according to the present invention, and FIG. 7 is a side sectional view showing the state in which the reflecting mirror is mounted. (6)...Mounting member, (7)--Reflector, @locking member, (]I)''-Elastic member. Fig. 1. Fig. 2

Claims (1)

[Claims] +11 A suspension member for regulating the mounting position of the reflector is installed on the mounting member, and while the reflector is held between the engaging members, string-like elastic members are attached to both sides of the reflector fs1j4
A method for attaching a reflector to a photoelectric switch, characterized in that the elastic member is tightened and held on the back side of the attaching member through a retaining hole formed in the attaching member.