Multiple-optical-axis photoelectric sensor
A photoelectric sensor and multi-optical axis technology, which is applied in the direction of instruments, scientific instruments, photometry, etc., can solve the problem of considering the invalid space of the frame, and achieve the effect of reducing the area where objects cannot be detected
Inactive Publication Date: 2018-01-23
ORMON CORP
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Problems solved by technology
However, when the overall length of the light-transmitting plate is set to be longer than the overall length of the ring-shaped elastic member, correspondingly, an invalid space will be generated in front of the frame.
In this way, in the multi-optical axis photoelectric sensor of Patent Document 1, although the elastic member compressed by the light-transmitting plate can be used to well close the opening in the front of the housing, the invalid space of the frame is not considered. There is still room for improvement
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[0057] Hereinafter, an embodiment of the multi-optical axis photoelectric sensor of the present invention will be described with reference to the drawings. figure 1 Shows the appearance of the multi-optical axis photoelectric sensor 1. The multi-optical axis photoelectric sensor 1 is a structure in which the light projector 10 and the light receiver 20 are arranged to face each other at a predetermined interval. In addition, in the present invention, with respect to each of the light projector 10 and the light receiver 20, the side facing each other is the front (front), and the side opposite to each other is the rear (back).
[0058] The light projector 10 and the light receiver 20 are respectively inside the substantially rectangular parallelepiped frame 2 except for the optical unit (the light emitting element 11 in the light projector 10, the light receiving element 21 in the light receiver 20) and the lens ( In addition to not shown), a control board (not shown) and the like...
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A multiple-optical-axis photoelectric sensor is provided which can fix a light transmission plate in a sealed state to a case body across an elastic member, and can reduce a zone incapable of object detection at the length direction of a frame. A light projector (10) and a light receiver (20) each includes a case body (3), a light transmission plate (4) closing an opening (39) in a front face of the case body (3), and a pair of caps (5) closing openings (38) in end faces of the case body (3). The case body (3) includes first supports supporting side edges (35) of the light transmission plate (4), the caps (5) respectively include second supports (53) supporting ends of the light transmission plate (4), the light transmission plate (4) is supported by the first supports (35) and the secondsupports (53) with an elastic member (8) interposed between the light transmission plate (4) and the first and second supports (35, 53), and first engagement units engaging with each other to restrictinward displacements of the ends of the light transmission plate (4) supported by the second supports (53) in the longitudinal direction are respectively provided in the cap (5) and the light transmission plate (4).
Description
Technical field [0001] The present invention relates to a multi-optical-axis photoelectric sensor that sets a plurality of optical axes between a light projector and a light receiver arranged opposite to each other, and detects the presence or absence of an object by detecting the light-shielding state of each optical axis. Background technique [0002] The light projector and the light receiver of the multi-optical axis photoelectric sensor each have a structure in which a plurality of optical units including optical elements and the like and a control board are housed inside a rectangular parallelepiped frame. The frame body is mainly composed of a shell, a pair of covers and a light-transmitting plate. The shell has openings on the front and both end faces. The pair of covers respectively block the openings on the two end faces of the shell. The front opening. [0003] When the multi-optical axis photoelectric sensor is installed in a place where dust or liquid is scattered, th...
Claims
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IPC IPC(8): G01V8/20
CPCG01V8/20G01D11/245G01D11/30G01J1/0295
Inventor 福本哲也泷口展亲西内智山路卓雅
Owner ORMON CORP