JPS5934883Y2 - Photoelectric switch - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a photoelectric switch.

With a transmission type optical switch, it is necessary to adjust the emitter's optical axis and the receiver's optical axis so that they match, or even if they do not match completely, they must be adjusted so that they are within a practical range. In addition, in the case of a reflective optical switch, it is necessary to adjust the mounting angle to set the operating position and operating area.

The object of this invention is to provide an improved photoelectric switch that allows the above-mentioned adjustment work to be performed easily.

One embodiment of this invention will be described below.

In FIG. 1, an optical lens 111 is attached to a case 110 of a light receiver 11.

The light beam converged by the lens 111 is received by a light receiving element (not shown) inside the case 110.

The operating angle of the light receiver 11 by the lens 111 is shown by a two-dot chain line.

A rear sight 21 and front sights 22 to 28 formed from a protrusion are formed on the side wall surface 112 of the case 110, and a rear sight 31 and front sights 32 to 38 formed from a projection are formed on the other side wall surface 113. has been done.

The straight line connecting the sights 21.22 and the straight line connecting the sights 31.32 are parallel to the optical axis.

The front sight 25.28.35.38 is the sight in the area that can be installed when the distance between the receiver 11 and the emitter 12 (see Figure 2) is 1 m, and the front sight 24.27°34,
37 is a sight in the area that can be installed when the distance is 3m, and forward sight 23, 26, 33, and 36 is a sight that can be installed when the distance is 5m.

For example, in FIG. 2, the light receiver 11 and the light emitter 12
If they are placed 1m apart, the sight 21.2
The position of the projector 12 is confirmed while visually checking the sights 21 and 28, and the position of the projector 12 is further confirmed while visually checking the sights 21 and 28.

In this way, the light receiver 11 is rotated in a vertical plane as shown by the arrow while visually confirming whether the projector 12 is located within the angle formed by the dashed-dotted line (see the dashed-dotted line in FIG. 1).

If the projector 12 is positioned within the above-mentioned angle, the optical axis can be adjusted in the vertical plane.

Adjustment of the optical axis in the horizontal plane can likewise be carried out using the sights 31-38.

As described above for the first embodiment, this invention is equipped with a sight that allows visual confirmation of a predetermined area, so it is extremely simple and easy to use without actually operating a photoelectric switch. Optical axis adjustment can be performed reliably.

Note that this invention is not limited to the above-mentioned one embodiment. For example, in the above embodiment, each sight was formed by a protrusion, but it may also be formed by a recess, or a name plate provided on the case may be formed. It may be printed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of this invention, and FIG. 2 is a schematic side view for explaining FIG. 1. 11...Receiver, 12...Emitter, 2
1.31... Rear sight, 22~28.32~3
8...Forward sight, 110...Case,
111...Lens, 112.113...
- Side wall surface of case 110.

Claims (1)

[Scope of utility model registration request] In a photoelectric switch in which a lens that transmits light is provided on the front surface of the case, at least one surface of the outer wall surface of the case includes one rear sight located at the rear and one rear sight located at the front with respect to the optical axis. 1. A photoelectric switch characterized by being provided with an optical axis adjustment sight consisting of a plurality of front sights arranged in a substantially perpendicular direction.