JPH0521804Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the mounting structure of a photoelectric sensor, and in particular, the wiring and its wiring when the photoelectric sensor is placed horizontally in line with recent space-saving efforts in factories, etc. Regarding the mounting structure.

[Conventional technology]

As shown in Fig. 7, the conventional photoelectric sensor has a structure in which light is emitted and received in the longitudinal direction of the main body, and accordingly, the light emitting surface and light receiving surface A and B are also located on the short side of the device. The wiring cable was pulled out from the other side. Further, in order to fix the photoelectric sensor in a predetermined location, for example, an L-shaped angle bracket is attached to the long side, and this is placed next to the belt of the conveyor belt, as shown in FIG.

[The problem that the idea aims to solve]

However, since the conventional photoelectric sensor described above has a light emitting and receiving surface in the long side direction, in order to install it on a conveyor belt, the conveyor width needs to have an allowance for that length. Efforts are being made to improve production efficiency per unit area, and as a result, various devices are required to be commensurate with the space savings. Furthermore, since each conventional photoelectric sensor has its own wiring cable drawn out from the control unit or terminal box, the wiring becomes complicated when many photoelectric sensors are required, and the processing thereof is extremely time-consuming.

The present invention aims to solve the above-mentioned conventional problems, and provides a mounting structure for photoelectric sensors that contributes to space saving in factories and does not require complicated wiring even when a large number of photoelectric sensors are used. With the goal.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a wiring cable hole with a protruding flange around the photoelectric sensor body, and a mounting bracket having a through hole corresponding to the flange is fitted to the flange through the through hole. At the same time, a hollow bolt with a head larger in diameter than the through hole is screwed into the cable hole, and a long hole for setting the elevation angle or depression angle is provided in the mounting bracket, and the bolt can be adjusted at any angle through this long hole. A method of tightening and fixing the above-mentioned mounting bracket to the photoelectric sensor body with screws was used.

In addition, instead of the through hole in the mounting bracket, a notch having a flange receiving portion was provided at a position corresponding to a wiring cable hole provided in the photoelectric sensor body.

[Effect]

The photoelectric sensor of the present invention is connected to a control unit, etc. using a multi-drop method by inserting a cable through a hollow bolt screwed into a cable hole for wiring. In addition, the mounting bracket fits the flange protruding from the cable hole into the through hole,
The photoelectric sensor body is rotatably supported, and the detection range is adjusted by rotating the photoelectric sensor body back and forth using the through hole or flange receiver as a fulcrum. The rotation angle is regulated by the length of the elongated hole, and the detection range is determined by tightening and fixing the mounting bracket to the photoelectric sensor body at an appropriate angle with screws.

〔Example〕

Hereinafter, one embodiment of the mounting structure of the photoelectric sensor of the present invention will be described in more detail with reference to the drawings. 1 is a photoelectric sensor main body, a light emitting surface 2 and a light receiving surface 3 are provided on its long side, and the device is mounted on the ceiling surface. It has an indicator light 4 such as a light emitting diode that indicates the operating state of the machine. Further, as shown in the main part sectional view of FIG. 4, a cable hole 5 for wiring is provided in the lower part of the main body, and a flange 6 is formed around the cable hole 5. Next, reference numeral 7 denotes a mounting bracket for fixing the photoelectric sensor main body 1 in a predetermined position, which has a through hole 8 corresponding to the flange 6, and an inner arc-shaped elongated hole 9 bored above the hole 8. It has mounting holes 10 and 11 for mounting on the device, etc.

To combine the photoelectric sensor main body 1 and the mounting bracket 7 described above, first, the through hole 8 is fitted into the flange 6 protruding from the cable hole 5, and the hollow bolt 12 is inserted.
is screwed into the cable hole 5, and the mounting bracket 7 is positioned between the photoelectric sensor body 1 and the hollow bolt 12. Next, the photoelectric sensor main body 1 is set at a suitable elevation angle or depression angle, and the screw 13 is passed through the elongated hole 9 and tightened and fixed. 14 is a wiring cable inserted inside the hollow bolt, 15 is a rubber bushing,
It is deformed by the screwing of the hollow bolt and functions to hold the distribution cable 14.

Note that the positional relationship between the through hole 8 and the elongated hole 9 is not limited to that shown in the drawings, and the through hole 8 is used as the fulcrum of rotation,
As long as the rotation angle is regulated by the elongated hole 9, the elongated hole 9 may be provided below or to the side of the through hole 8. Furthermore, it is also possible to clamp the mounting bracket 7 by shortening the protruding length of the flange 6 and tightening the hollow bolt 12. Furthermore, considering that other wiring methods may be required depending on the fixed position of the photoelectric sensor, a configuration is adopted in which another wiring hole is easily punched out on the bottom of the photoelectric sensor body 1 during use. Sometimes.

In addition, as another configuration of the mounting bracket, a notch 17 having a receiving portion 16 for the hollow bolt 12 may be provided in place of the through hole 8 shown in FIG. 3 (see FIG. 5). In this case, it is more convenient to attach the mounting bracket 7 first, insert the photoelectric sensor body 1 along the notch 17, and then simply tighten the hollow bolt 12 to assemble the two.

FIG. 6 shows a plurality of photoelectric sensors of the present invention installed along the frame of a conveyor belt. According to this embodiment, a plurality of photoelectric sensors are connected in parallel using a multi-drop method and connected to the control unit 18, so that only one wiring cable is required in appearance, making the wiring extremely simple. Therefore, it can be sufficiently used in factories and the like where the purpose is to save space.

[Effect of idea]

In the mounting structure of the photoelectric sensor of the present invention, first, the mounting bracket is pivotally supported by the flange, and then the wiring cable is inserted through the inside of the hollow bolt, so that the wiring space can be omitted. Also,
Since multiple photoelectric sensors can be connected using a single wire in a multi-drop method, there is no need to worry about wiring, making it possible to perform simple processing.

Furthermore, the through-hole or notch receiver can be used as a fulcrum for rotation, and the elongated hole can regulate the angle of elevation or depression of the photoelectric sensor body, so it can immediately respond to the size of the sensing object and the height of the sensing surface. As a result, daily maintenance and inspections have become easier and can be omitted.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing one embodiment of the mounting structure of the photoelectric sensor of the present invention, Figure 2 is a perspective view of the sensor body, Figure 3 is a perspective view of the mounting bracket, and Figure 4 is the photoelectric sensor body and installation. 5 is a perspective view showing another embodiment of the mounting bracket, FIG. 6 is a schematic diagram of a case where a photoelectric sensor is used in a conveyor, and FIGS. 7 and 8 are The figure is a perspective view showing a conventional example. In the figure, 1... photoelectric sensor body, 5... cable hole, 6... flange, 7... mounting bracket, 8...
...Through hole, 9...Long hole, 12...Hollow bolt, 16
... Receiving part, 17 ... Notch.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A light emitting/receiving surface is provided on the long side of the photoelectric sensor body, and a cable hole 5 for wiring with a flange 6 protruding around the short side is provided on the short side, while passing through the cable hole 5 for wiring; Mounting bracket 7 having a through hole 8 corresponding to the flange
A hollow bolt 12 that fits into the flange through the through hole and has a head having a larger diameter than the through hole.
is screwed into the cable hole, and the mounting bracket is provided with a long hole 9 for setting the angle of elevation or depression, and the mounting bracket and the photoelectric sensor body are tightened and fixed at an arbitrary angle through this long hole. A photoelectric sensor mounting structure characterized by the following. 2. The photoelectric sensor mounting structure according to claim 1, wherein instead of the through hole of the mounting bracket 7, a notch 17 having a flange receiving portion 16 is provided at a position corresponding to a cable hole provided in the photoelectric sensor body 1.