Patent ID: 8767197

Claim:
An automatic angle adjustment unit for use in an object detection device, the object detection device causing a receiving detection unit of a receiver to receive detection beams, for object detection, transmitted from a transmitting detection unit of a transmitter and to output a detection signal, in which the object detection device includes an angle adjustment mechanism that has a horizontal adjustment-engagement member and a vertical adjustment-engagement member, disposed adjacent to each other, which adjust a horizontal angle of at least one of the receiving detection unit and the transmitting detection unit rotatable about a vertical axis and a vertical angle of at least one of the detection units rotatable about a horizontal axis, and in which the automatic angle adjustment unit is engageable with the horizontal adjustment-engagement member and the vertical adjustment-engagement member of the object detection device, to drive both adjustment-engagement members from the exterior and to adjust the horizontal angle and the vertical angle of at least one of the detection units, thereby to perform automatic angle adjustment, the automatic angle adjustment unit comprising: an engagement-drive transmission section that removably engages with the horizontal adjustment-engagement member and the vertical adjustment-engagement member from the exterior, and drives both adjustment-engagement members; a driving section for driving the engagement-drive transmission section; a clamping section for removably securing the automatic angle adjustment unit to the object detection device; a level input section for receiving the detection signal level inputted from the object detection device; and an adjustment unit control section for performing a control for causing the driving section to drive the engagement-drive transmission section based on the detection signal level, to adjust the horizontal angle and the vertical angle of at least one of the detection units.