JPH01142099U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 explains the configuration of the light receiver in the first embodiment of the present invention, where Figure A is a side view and Figure B is a side view.
is a view taken along the Q arrow in FIG. Figure 2 explains the configuration of the light emitter in the first embodiment of the present invention, Figure 2A is a side view, Figure 2B is Figure 2A.
FIG. Figure 3 is the first example of this invention.
FIG. 4 is a side view illustrating the configuration of the embodiment, and is an external view of an automatic pass ticket issuing device employing a conventional photoelectric detection device. FIG. 5 illustrates the structure of the vehicle height detection device light emitting tower in the automatic ticket issuing device shown in FIG. 4, with FIG. 5A being a side view and FIG. 5B being a front view. FIG. 6 illustrates the configuration of a light emitter in a conventional photoelectric detection device, with FIG. 6A being a side view and FIG. 6B being a view taken along arrow P in FIG. 6A. 7, 36... Light emitter, 8... Beam light, 8a...
...Optical axis, 14...Housing, 14a...Gable roof-like side wall portion, 14a1...Eave-like projection, 14b...Bottom of case, 14c...Ridge line, 15, 27...Light transmission window, 16, 28...Through hole, 19...Light emitting element, 2
4, 37... Outdoor photoelectric detection device, 26... Light receiver, 29... Glass plate with heat wire, 31... Thin plate heater, 33... Light receiving element, 34... Hood, X
-X...axis center, W...plane.

Claims (1)

[Scope of utility model registration request] The device is composed of a light emitter and a light receiver, and the light beam emitted by the light emitter is arranged so that the light receiver receives the light beam, and an object that blocks the light beam is detected. In each case, a part of the side wall is formed in the shape of a gable roof over the entire length of the casing, and one end of the side wall in the form of a gable roof projects like an eave, and a closed cylindrical casing with bottoms at both ends and a light transmitting window is provided at the bottom of the casing, and a thin plate-shaped sub-heater attached to the gable roof-shaped side wall from the inside of the casing, and The light emitter includes a light emitting element fixed within the cylindrical body so as to emit the beam light parallel to the axis of the housing through the light transmission window, and the light receiver is provided with a light beam parallel to the axis of the housing. a light-receiving element fixed within the housing so as to receive the parallel beam light through the light transmission window; and a cylindrical hood fixed within the housing so that the beam light passes through; The ridgeline of the roof-like side wall portion is arranged parallel to the axis of the housing, and the light transmission window connects to a hexagonal through hole provided at the bottom of the housing so as to close the through hole from the inside of the housing. and a transparent plate-shaped main heater fixed to the bottom of the housing, and a pair of opposing apexes of the hexagonal through hole are both aligned with the axis of the housing and the ridgeline of the gable roof side wall. and the first plane is set such that the optical axis of the beam light is not included in the first plane, and the main heater and the sub-heater are arranged on a first plane parallel to a plane containing They are configured to operate as belonging to independent negative feedback temperature control systems, and further, the ridgeline of the gable roof-like side wall portion is located above the axis of the housing and is approximately horizontal. An outdoor photoelectric detection device characterized by using the light emitter and the light receiver.