JP2017150826A - Object detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an object detection device with which it is easy to manipulate settings for shading of light and which dispenses with a large opening provided for a change in the direction or position of a rotary operation member.SOLUTION: An object detection device comprises: an optical area rejection member 11, rotatably provided and located between a detection element 31 and a lens 32 or on the side of the lens 32 opposite the detection element 31, for shading a portion of an optical path passing through a plurality of lens segments 32a and optically excluding detection areas A1-1, A1-2, etc., facing the shaded optical path; a rotary operation member 14 for rotating the optical area rejection member; a first engagement body 12 that rotates integrally with the optical area rejection member 11; and a second engagement body 13 for engaging with the first engagement body 12 and conveying the rotary force of the rotary operation member 14 to the first engagement body 12, and at the time of swing movement of the lens 32, maintaining the engaged state with the first engagement body 12 while relatively moving with the first engagement body 12.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an object detection device that detects an object such as a human body.

  As an object detection device that detects an object in a plurality of detection areas, an active object detection device that has been conventionally known projects a detection wave for object detection toward the plurality of detection areas, and reflects the reflected object. A light reception signal is generated in response to the detection wave, and an object is detected when the light reception signal exceeds a set level.

  Among such object detection devices, there is one in which a light shielding device is used to exclude a part of a plurality of detection areas (Patent Document 1). For example, in the light receiver 120 of the automatic door object detection device 101 shown in FIG. 10, a pair of light shielding plates 111 are provided between the light receiving element 131 and the light receiving lens 132 attached to the wiring board 124. It has been. After the object detection device 101 is attached to the eyeless 50 of the automatic door 51 shown in FIG. 11A, the light shielding plate 111 is set so as to exclude a part of the plurality of detection areas as necessary at the time of adjustment and setting. The

  The shading plate 111 is inserted into the cross groove 114a (FIG. 10) provided in the head of the screw body 114 connected to the shading plate 111 and turned by the operator, and the shaft center C1 is turned. Is turned around. Thereby, a part of the optical path α (FIG. 10) is blocked and a predetermined detection area is excluded.

  By the way, the lens 132 of the light receiver 120 can be swung to shift the detection area of the object detection apparatus 101. The shading plate 111 is also interlocked with the swing of the lens 132. Therefore, when the lens 132 is swung, as shown in FIG. 11B, the lens 132 and the light shielding plate 111 are inclined while the object detection device 101 is fixed to the eyeless 50. In the automatic door object detection apparatus 101, first, in order to shift the plurality of detection areas, first, the lens 132 and the light shielding plate are tilted, and then the light shielding plate 111 is rotated as necessary, so that the plurality of light shielding plates 111 are rotated. A part of the detection area is excluded. Therefore, the installer must turn the inclined screw body 114 with the driver 161. Therefore, the inner cover 105 of the object detection device 101 is provided with an opening 108 having a size that is extremely larger than that of the screw body 114 so as to be compatible with the driver 161 inserted obliquely.

Japanese Patent No. 5267039

  However, if the opening 108 is large in the inner cover 105, it is inevitable that dust, water, and the like enter the object detection apparatus 101. Further, when the screw body 114 is inclined, a large gap S1 is formed between the screw body 114 and the cover 105, so that dust, water, and the like are more easily entered. Further, if the screw body 114 is inclined, the installer must insert the driver 161 into the opening 108 from an oblique direction and operate the screw body 114 retracted inward of the object detection device 101. Is difficult.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an object detection device that can be easily set for light shielding and that does not require a large opening for changing the direction and position of a rotating operation member. .

  In order to achieve the above object, an object detection device according to one configuration of the present invention includes a detection element including a light projecting element that generates a detection wave or a light reception element that receives the detection wave, and a lens corresponding to a plurality of detection areas. A part of an optical path passing through the plurality of lens segments, the lens having a segment, and rotatably provided between the detection element and the lens or on the opposite side of the lens from the detection element An optical area exclusion member that optically excludes a detection area corresponding to the shielded optical path, a rotation operation member that rotates the optical area exclusion member, and the optical area exclusion member, A first engaging body that rotates integrally; and a rotational force of the rotating operation member that is engaged with the first engaging body and transmitted to the first engaging body; 1st engagement body While the relative movement and a second engagement body to maintain the engagement state between the first engagement body.

  According to this configuration, the first engagement body that rotates integrally with the optical area exclusion member and the first engagement body are engaged with each other, and the rotational force of the rotation operation member is transmitted to the first engagement body. And a second engagement body that maintains a state of engagement with the first engagement body while moving relative to the first engagement body when the lens is swung. Relative movement of the second engagement body can prevent the rotation operation member from changing its orientation and position following the rotation of the optical area exclusion member. Therefore, it is easy for the installer to operate the rotation operation member. In addition, the cover does not require a large opening for changing the direction and position of the rotation operation member.

  In a preferred embodiment, the lens is housed in a lens holder, and the optical area exclusion member is rotatably supported by the lens holder. According to this, since the optical area exclusion member is rotatable with respect to the lens holder in which the lens is accommodated, the optical path passing through the predetermined lens segment of the lens can be appropriately excluded by the optical area exclusion member. it can.

  In another preferred embodiment, the optical area exclusion member further includes a positioning projection, and the lens holder has a plurality of positioning portions that lock the positioning projection at a plurality of rotational positions of the optical area exclusion member. Has holes. According to this, the part to exclude among a plurality of detection areas can be changed in a stable and stepwise manner.

In a preferred embodiment, the apparatus further comprises an apparatus main body that holds the detection element, the lens, and the optical area exclusion member, and a support that covers the apparatus main body and allows the detection wave to pass therethrough. The second engagement body is rotatably supported. According to this, since the second engagement body is rotatably supported by the support body that covers the apparatus main body, the second engagement body does not move relative to the apparatus main body, and the rotational force of the rotation operation member is increased. It can be transmitted to the first engagement body.
The support is preferably an inner cover of the object detection device.

  Preferably, the rotation operation member is rotatably supported by the support body together with the second engagement body.

  In a preferred embodiment, one of the first engagement body and the second engagement body has an engagement protrusion, and the other has an engagement groove in which the engagement protrusion is engaged with each other so as to be relatively movable. According to this, since the engagement protrusion and the engagement groove are engaged, the rotational force applied to either one of the first engagement body and the second engagement body provided with these can be transmitted to the other. In addition, since the engagement protrusion and the engagement groove are relatively movable, the light projection lens and the light reception lens are swung and tilted, so that the relative position between the optical area exclusion member and the rotation operation member is increased. Even if the engagement is shifted, the engagement protrusion and the engagement groove can be relatively moved so as to maintain the engagement, so that the rotation operation member does not tilt.

  Preferably, the detection element is the light receiving element, and the plurality of lens segments are a plurality of light receiving lens segments that cause the detection waves reflected by objects in the plurality of detection areas to enter the light receiving element. The optical path shielded by the optical area exclusion member is an optical path passing through the lens segment of the light receiving lens.

  Preferably, the object detection device is for an automatic door. In that case, the object detection device is attached to the periphery of an automatic door such as an invisible, an invisible lower part or a ceiling.

  According to the object detection device of the present invention, it is not necessary to provide a large opening in the cover in preparation for the change in the direction and position of the rotation operation member.

It is a side view of the several detection area row | line seen from the sliding direction of the automatic door using the object detection apparatus which concerns on the 1st Embodiment of this invention. It is a top view which shows the some detection area of the detection area row | line | column of FIG. 1A. It is a perspective view which shows the state which removed the outer cover and window material of the object detection apparatus which concerns on the 1st Embodiment of this invention. It is a perspective view of the object detection apparatus which abbreviate | omitted illustration of the lens holder with respect to the object detection apparatus which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the state which removed the inner cover further of the object detection apparatus of FIG. 2A. It is a perspective view which shows the state by which the lens holder of the object detection apparatus of FIG. 2A was swung, Comprising: Illustration of an outer cover and a window material is abbreviate | omitted. It is a perspective view which shows the state by which the lens holder of the object detection apparatus of FIG. 2B was swung. It is a perspective view which shows the state by which the lens holder of the object detection apparatus of FIG. 2C was swung. It is a disassembled perspective view which shows the light-shielding apparatus of the object detection apparatus of FIG. 2A-FIG. 2C. It is a figure of the light receiver of the object detection apparatus of FIG. 2A, Comprising: It is a cross-sectional view along the VV line of FIG. 2A. It is a figure of the light-shielding device of the object detection apparatus of FIG. 1A, Comprising: The lens holder is not swung, The state before the light-shielding member is rotated is shown, (a) is a VIa-VIa line | wire of FIG. 2A. A side view along (however, the rotational position of the light shielding plate is different from that in FIG. 2A), and (b) is a top view taken along the line VIb-VIb of (a). It is a figure of the light-shielding device of the object detection apparatus of FIG. 1A, Comprising: The lens holder is swung, the state before a light-shielding member is rotated is shown, (a) follows the VIIa-VIIa line | wire of FIG. 3A. The side view (however, the rotating position of the light shielding plate is different from that in FIG. 3A), (b) is a top view taken along line VIIb-VIIb in (a). It is a figure of the light-shielding device of the object detection apparatus of FIG. 1A, Comprising: It is a figure which shows the state after the lens holder is swung and the light-shielding member is rotated, (a) is VIIa- of FIG. The side view along the VIIa line (however, the rotation position of the light shielding plate is different from FIG. 3A), (b) is a top view along the VIIIb-VIIIb line of (a). It is a perspective view of the light-shielding apparatus of the object detection apparatus which concerns on the 2nd Embodiment of this invention. It is a cross-sectional view of a light receiver of a conventional object detection device. It is a longitudinal cross-sectional view of the light-shielding device of the conventional object detection apparatus, Comprising: It is a figure which shows the state where the lens holder is not swung. It is a longitudinal cross-sectional view of the light-shielding device of the conventional object detection apparatus, Comprising: It is a figure which shows the state by which the lens holder was swung.

Hereinafter, an object detection device according to a first embodiment of the present invention will be described with reference to the drawings.
First, the detection area will be described prior to the description of the object detection device. The object detection device according to the first embodiment of the present invention is an object detection device for an automatic door.

  FIG. 1A shows a side view of the detection area of the safety sensor in the object detection device as seen from the sliding direction of the automatic door 51, and FIG. 1B shows a plan view of the detection area. The object detection device 1 is attached to the outer surface or inner surface of the eyeless 50, and detects and recognizes an object for opening / closing control of the automatic door 51. The object detection device 1 is connected to a controller (not shown) of a door engine (not shown) housed in the eyeless 50.

  As shown in FIG. 1A, the safety sensor 2 of the object detection apparatus 1 detects objects in the five detection area rows A1 to A5. As shown in FIG. 1B, each of these detection area rows A1 to A5 includes a plurality of detection areas (for example, 20 detection areas A1-1, A1-2,... For the first detection area row A1). , A1-20). The object detection device 1 also has a start sensor, and the detection area of the start sensor is formed at a position farther from the detection area rows A1 to A5 of the safety sensor 2, that is, a position away from the automatic door 51. Illustration of the detection area is omitted.

  FIG. 2A shows a state where the outer cover 35 and the window member 36 are removed from the object detection device 1. In this state, the installer performs various adjustments and settings of the object detection device 1. The object detection device 1 includes a safety sensor 2 and a startup sensor 3. The activation sensor 3 detects that a human body is approaching the automatic door 51 (FIG. 1A) and opens the automatic door. The safety sensor 2 detects the presence of a human body near the automatic door 51 (FIG. 1A) and prevents pinching.

  The object detection device 1 includes a device main body 4 and a resin inner cover 5. The apparatus main body 4 has a mounting surface 4a. The mounting surface 4a is brought into contact with the outer surface 50a of the eyeless 50 in FIG. The object detection device 1 may be installed other than the eyeless 50. For example, it may be installed below the eyeless 50 or on the ceiling. 2A is attached and fixed to the apparatus main body 4 so as to cover the front of the apparatus main body 4 (upward in the drawing). The inner cover 5 is provided with a safety sensor operation window 6 and an activation sensor operation window 7 by through holes. The inner cover 5 is further provided with a light shielding plate operating window 8 by a notch. The safety sensor operation window 6 enables access from the outside for adjusting the safety sensor 2. The activation sensor operation window 7 enables external access for adjusting the activation sensor 3. The light shielding plate operation window 8 is composed of two light shielding plate operation windows 8a and 8a. These windows 8a and 8a allow access from the outside for operating an optical area exclusion member to be described later.

  The safety sensor 2 is an AIR (active infrared type) sensor, for example, and has one lens holder 9. The lens holder 9 accommodates two projectors 20 and 20 arranged along the lateral direction X and two light receivers 30 and 30 arranged further in the lateral direction X with respect to these projectors 20 and 20. A first wiring board (safety sensor wiring board) 24 is attached to the back of the lens holder 9. The two projectors 20, 20 are for object detection toward each of five detection area rows A1 to A5 (FIG. 1A) from positions close to them, that is, from positions close to the automatic door 51 (FIG. 1A) to positions far from them. It emits near infrared light, which is a kind of detection wave. The two projectors 20 and 20 project light to the detection area, one on the left side and the other on the right side when viewed from the object detection device 1. Each of the two light receivers 30 and 30 receives a detection wave reflected by an object and generates a light reception signal. The two light receivers 30, 30 receive reflected light from the detection area on the left side and the other on the right side as viewed from the object detection device 1.

  FIG. 2B is a view in which the lens holder 9 in the object detection apparatus 1 of FIG. 2A is omitted. The illustrated configuration is shown so that the inside of the projector 20 and the light receiver 30 can be easily seen. Actually, the lens holder 9 (FIG. 2A) houses the light projector 20 and the light receiver 30. It is attached to the apparatus body 4 later.

  Each projector 20 includes a plurality of light projecting elements (a type of sensing element) 21 that generates near infrared rays as detection waves, and a light projecting lens 22 that projects the detection waves generated by the plurality of light projecting elements 21. Have. The plurality of light projecting elements 21 are mounted on the first wiring board 24. In FIG. 2B, only a part of the light projecting elements 21 of one projector 20 is shown, but each projector 20 is used for the first to third detection area rows A1 to A3 (FIG. 1A). Alternatively, three pairs of light projecting elements 21 and 21 arranged in two in the lateral direction X may be provided in the front-rear direction Y (vertical direction on the paper surface). Each light projector 20 also includes two light projecting elements 21 in the front-rear direction Y (vertical direction on the paper surface) for the fourth and fifth detection area rows A4 and A5 (FIG. 1B). Good. Each light projecting element 21 is made of, for example, an infrared light emitting diode.

  The light projecting lens 22 is divided into a plurality of, for example, five along the lateral direction X, and includes five light projecting lens segments 22-1 to 22-5. These light projecting lens segments 22-1 to 22-5 project the near infrared rays generated by the light projecting element 21 toward different detection areas. That is, a plurality of detection areas are configured in each of the detection area rows A1, A2,..., A5 (FIG. 1B) by the five light projecting lens segments 22-1 to 22-5.

  Each of the light receivers 30 includes a plurality of light receiving elements (a kind of detecting element) 31 that receives a detection wave that is a near infrared ray, and a light receiving lens 32 that receives the detection wave. A plurality of light receiving elements 31 are also mounted on the first wiring board 24. In FIG. 2B, only a part of the light receiving elements 31 of one light receiver 30 is shown, but each of the light projectors 30 includes, for example, first to third detection area rows A1 to A3 (FIG. 1B). As an example, three pairs of light receiving elements 31, 31 arranged in two in the lateral direction X may be provided in the front-rear direction Y (vertical direction on the paper surface). Each light receiver 30 may also include two light receiving elements 31 in the front-rear direction (vertical direction on the paper surface) for the fourth and fifth detection area rows A4 and A5 (FIG. 1B). . Each light receiving element 31 is made of a photodiode, for example.

  The light receiving lens 32 is divided into a plurality of, for example, five along the horizontal direction X, and has five light receiving lens segments 32-1 to 32-5. These light receiving lens segments 32-1 to 32-5 make the detection waves reflected by the different detection areas enter the light receiving element 31. That is, by the five light receiving lens segments 32-2 to 32-5, the detection wave reflected by the object in the plurality of detection areas in each detection area row A 1, A 2,..., A 5 (FIG. 1B). To enter.

  For each of the plurality of light receiving elements 31 of the two light receivers 30, 30, it is determined whether or not the light reception signal generated by receiving the detection wave exceeds the set level. If it is determined that the set level is exceeded, an object detection signal is output to the controller (not shown) of the automatic door 51 (FIG. 1A). The automatic door 51 (FIG. 1A) is opened based on this object detection signal.

  FIG. 2C shows a state where the inner cover is removed from the object detection device 1 of FIG. 2A. The light receiving devices 30 and 30 are provided with light shielding devices 10 and 10 which will be described in detail later.

  The lens holder 9 is swingable about a rotation axis C0 extending in the longitudinal direction X of the object detection device 1. Specifically, when the object detection device 1 is installed, the projector 20 and the light receiver 30 face downward (frontward on the paper surface) along the vertical direction Z (front and rear direction on the paper surface) of the object detection device 1. As shown in FIG. 3, the object detection apparatus 1 can swing freely in the front-rear direction Y (vertical direction on the paper surface). This swing mechanism is publicly known, and is provided with a safety sensor operation unit 41 provided with a cross groove for adjusting a swing angle. The angle of the swing is adjusted by inserting the tip of a driver (not shown) or the like into the safety sensor operation unit 41 through the safety sensor operation window 6 and turning the operation unit 41. The The detection area rows A1 to A5 in FIGS. 1A and 1B are both shifted in the front-rear direction Y by swinging. 3B and 3C correspond to FIGS. 2B and 2C, respectively, and the lens holder 9 is swung around the rotation axis C0 extending in the longitudinal direction X of the object detection device 1. FIG. Show.

  Returning to FIG. 2C, each light shielding device 10 is used to optically exclude a part of the plurality of detection areas A1-1, A1-2,... A5-20 in FIG. When the safety sensor 2 is used without optical exclusion, the plurality of detection areas include, for example, an area where a person does not pass, such as a wall next to a door, or an area in which erroneous detection of an object is likely to occur, such as wind. It may include areas where there are swaying trees or objects that reflect sunlight. The light shielding device 10 provided in the light receiver 30 of the object detection device 1 excludes such an area from the detection area and prevents erroneous detection.

  Details of the shading device 10 are shown in FIG. The light shielding device 10 includes a light shielding plate (optical area exclusion member) 11, a first engagement body 12, a second engagement body 13, and a light shielding operation member 14.

  As shown in FIG. 5, the light shielding plate 11 is rotatably provided between the light receiving element 31 and the plurality of light receiving lens segments 32-1 to 32-5. The light shielding plate 11 may be provided on the side opposite to the light receiving element 31 of the light receiving lens segments 32-1 to 32-5, that is, outside the light receiving lens segments 32-1 to 32-5. That is, the light shielding plate 11 is provided around the lens segments 32-1 to 32-5 so as to shield a part of the optical path passing through the plurality of light receiving lens segments 32-1 to 32-5.

  The light shielding plate 11 has a rectangular flat plate shape as shown in FIG. The light shielding plate 11 is made of a resin that absorbs near infrared rays. The light shielding plate 11 is rotatable about a rotation axis C <b> 1 extending in the front-rear direction Y along one end side portion thereof. As shown in FIG. 5, the rotation axis C <b> 1 is located slightly in front of the light receiving element 31. Therefore, the light shielding plate 11 is a part of an optical path between the light receiving element 31 and the plurality of light receiving lens segments 32-1 to 32-5, and includes a plurality of light receiving lens segments 32-1 to 32-5. An optical path passing through the predetermined lens segment can be shielded. That is, the light shielding plate 11 positioned at the rotation position P0 substantially parallel to the safety sensor wiring board 24 of the projector 20 does not block the optical path, but is at the rotation position P3 substantially perpendicular to the safety sensor wiring board 24. The light shielding plate 11 positioned shields the optical path portion outside the light shielding plate 11. For example, if the light shielding plate 11 is positioned at the rotation position P1 between the optical path passing through the outermost light receiving lens segment 32-1 and the optical path passing through the adjacent light receiving lens segment 32-2, the light shielding plate 11 shields the optical path passing through the light receiving lens segment 32-1 located on the outermost side. Thereby, some detection area areas A1-1, A1-2, A2-1, A2-2, A3-1, A3-2, A4-1, and A5-1 in FIG. 1A can be excluded from the detection areas.

  Returning to FIG. 4, the first engagement body 12 is coupled to the light shielding plate 11. The first engaging body 12 and the light shielding plate 11 are integrally formed with the shaft portion 16, and the shaft portion 16 is fitted into a shaft hole (not shown) formed in the lens holder 9, so that the lens holder 9 can be rotated. It is supported freely. While the light shielding plate 11 is located in the lens holder 9, the first engaging body 11 is located in contact with the outer surface 9 a of the lens holder 9. The light shielding plate 11 and the first engagement body 12 rotate around the rotation axis C <b> 1 that matches the center of the shaft portion 16. On the other hand, the light shielding plate 11 and the first engagement body 12 follow the swinging motion of the lens holder 9 because they do not perform relative movement other than rotation with respect to the lens holder 9.

  In the present embodiment, the first engagement body 12 has an extension portion 12a extending from the shaft portion 16, and an engagement protrusion 12b provided at the tip portion of the extension portion 12a. The extension part 12a has a flat fan shape, for example. The extending portion 12a is slightly shorter than the opposing sides of the light shielding plate 11. The engaging protrusion 12b protrudes from the extending portion 12a in a direction away from the light shielding plate 11. The engagement protrusion 12b is preferably spherical.

  The light shielding plate 11 has an end surface 11a facing the extending portion 12a of the first engaging body 12, and has a positioning projection 11b at a tip portion 11a away from the rotation axis C1. The lens holder 9 is formed with a plurality of positioning holes 9b for locking the positioning protrusions 11b. Therefore, the light shielding plate 11 is locked at any one of a plurality of rotation positions P1 to P3 (FIG. 5) corresponding to the positions of the positioning holes 9b. Therefore, the installer can accurately turn to a predetermined position.

  The second engagement body 13 that engages with the first engagement body 12 in FIG. 4 has an elongated straight shape with a U-shaped cross section, and the engagement groove 13b is formed between the two side walls 13a and 13a of the structure. Is formed. The width of the engagement groove 13b has such a dimension that the engagement protrusion 12b of the first engagement body 12 can be accommodated and movement in the width direction within the engagement groove 13 can be restricted.

  The rotation operation member 14 is connected to the second engagement body 13 through an opening of the inner cover 5 (support body). The rotation operation member 14 and the second engagement body 13 are connected to each other by a shaft portion 17 formed integrally therewith, and are rotatably supported by the inner cover 5. That is, the rotation operation member 14 and the second engagement body 13 rotate around the operation axis C <b> 2 that matches the center of the shaft portion 17. The second engagement member 13 is a main wiring board (not shown) on which electronic components of the object detection device 1 are mounted, and is connected to a controller (not shown) of a door engine (not shown). The main wiring board (not shown) is passed through.

  The rotation operation member 14 of FIG. 4 is disk-shaped, and has a cross groove for adjusting the rotation angle on the top surface 14a. The rotation position of the two rotation operation members 14 of FIG. 2A is adjusted by inserting and turning the tip of a driver (not shown) or the like through one light shielding plate operation window 8a. . The installer adjusts the two rotation operation members 14 in order.

  Although not described in detail, the activation sensor 3 in FIGS. 2A to 3C has an activation sensor operation unit 42 provided with a cross groove for adjusting the swing angle, as in the safety sensor 2. The activation sensor operation unit 42 is adjusted in the swing angle by the operator inserting and turning a tip portion such as a driver (not shown) through the activation sensor operation window 7. The start sensor 3 is, for example, an AIR (active infrared type) sensor.

Next, a setting method of the object detection device 1 according to the first embodiment will be described.
As shown in FIG. 1A, the installer attaches the object detection device 1 to the eyeless 50, and operates the safety sensor operation unit 41 (FIG. 2A) as necessary to adjust the swing angle, thereby detecting the detection area. The columns A1 to A5 are shifted in the front-rear direction Y as necessary.

  For example, the detection area rows A1 to A5 at the initial position facing the downward direction Z1 in FIG. 1A are shifted in the forward direction Y1 so that the detection area rows A1 to A5 are separated from the automatic door 51. In this case, the installer operates the safety sensor operation unit 41 with respect to the object detection device 1 in FIG. 2A to adjust the swing angle of the lens holder 9 shown in FIG. 3A, and faces the lens holder 9 in the front direction Y1. Rotate as follows.

  Thereby, the lens holder 9 located at the rotation position P0 (FIG. 5) shown in FIGS. 6A and 6B is inclined as shown in FIG. And the engagement protrusion 12b of the first engagement body 12 relatively moves along the longitudinal direction of the engagement groove 13a while maintaining the engagement state with the engagement groove 13a of the second engagement body 13. Thereby, the rotation operation member 14 is not tilted, but the lens holder 9, the light shielding plate 11, and the first engagement body 12 are allowed to tilt (swing).

  Next, the installer operates the rotation operation member 14 to move the light shielding plate 11 positioned at the rotation position P0 to another rotation position, for example, the rotation position P3 (FIG. 8A and FIG. 8B). 5). Here, since the position of the rotation operation member 14 has not changed since the installation of the object detection device 1, the installer can easily operate by inserting a driver from the front of the object detection device 1. Therefore, the light shielding plate 11 can be rotated by the same operation as in the case where the lens holder 9 is not swung and is in the initial position shown in FIGS.

  An object detection apparatus according to the second embodiment will be described with reference to FIG. Note that in this embodiment, components that are the same as those described in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

  In the second embodiment, the first engaging body 12A and the second engaging body 13A of the light shielding device 10A have a structure opposite to that in the first embodiment. That is, the first engagement body 12A includes the engagement groove 12Ab, and the second engagement body 13A includes the engagement protrusion 13Ab. The connection between the first engagement body 12A and the light shielding plate 11 and the connection between the second engagement body 13A and the rotation operation member 14 are the same as those shown in FIG.

  According to the present embodiment, the arrangement of the engagement grooves 12Ab and the engagement protrusions 12Ab in the light shielding device 10A is reversed, but their relative relationship is the same as that of the light shielding device of the object detection device according to the first embodiment. Since they are identical, the functions described with respect to the first embodiment are achieved similarly.

  The present invention is not limited to the above-described embodiment, and various additions, modifications, or deletions can be made without departing from the gist of the present invention.

  For example, in each of the embodiments described above, the rotation operation member 14 and the second engagement body 13 are connected via the shaft portion 17, but the rotation operation member 14 and the second engagement body 13 are connected to each other. One or more additional members that transmit the rotational force of the rotation operation member 14 to the second engagement body 13 may be interposed therebetween.

  Moreover, although the AIR (active infrared ray) type sensor has been described as the safety detection sensor 2, it is not limited to this. In addition to this, the safety detection sensor 2 is a TOF (time-of-flight measurement) type sensor, a laser sensor, or a PIR (passive infrared) type sensor having only a light receiving element that receives a detection wave that is a far infrared ray. It may be. The sensor is not limited to these, and any type of sensor may be used as long as it can detect an object and the light shielding device 10 (10A) can shield part of the optical path.

  Further, although the light shielding device is provided in the safety detection sensor 2, it may be provided in the activation detection sensor 3 in the same manner. Instead, the safety detection sensor 2 may not be provided with the light shielding device, but may be provided only on the activation detection sensor 3.

  Furthermore, the object detection device may include only the safety detection sensor 2 without including the activation detection sensor 3.

  Although the projector and the light receiver of the object detection device have been described as being capable of swinging forward, in addition to this, it may be possible to swing in the lateral direction.

  The light shielding device may be provided in the projector instead of the light receiver.

  Although the object detection device according to each embodiment has been described as an object detection device for an automatic door, it may be an object detection device for other purposes.

DESCRIPTION OF SYMBOLS 9 Lens holder 11 Optical detection area exclusion member 12 1st engagement body 13 2nd engagement body 14 Rotation operation member 21 Light projection element 24 1st wiring board 31 Element for detection 32 Lens 32-1 to 32-5 Lens segment A1-1, A1-2, ..., A5-10 Detection area

Claims (8)

A detection element comprising a light emitting element for generating a detection wave or a light receiving element for receiving the detection wave;
A lens having a lens segment corresponding to a plurality of detection areas;
It is located between the detection element and the lens or on the opposite side of the lens from the detection element, and is rotatably provided to block a part of an optical path passing through the plurality of lens segments. An optical area excluding member that optically excludes a detection area corresponding to the optical path formed,
A rotation operation member for rotating the optical area exclusion member;
A first engagement body that rotates integrally with the optical area exclusion member;
The first engaging body is engaged to transmit the rotational force of the rotational operation member to the first engaging body, and the first engaging body is moved relative to the first engaging body when the lens is swung. An object detection device comprising: a second engagement body that maintains an engagement state with the engagement body. The object detection apparatus according to claim 1,
The object detection apparatus, wherein the lens is housed in a lens holder, and the optical area exclusion member is rotatably supported by the lens holder. The object detection device according to claim 2,
The optical area exclusion member further has a positioning projection, and the lens holder has a plurality of positioning holes for locking the positioning projection at a plurality of rotational positions of the optical area exclusion member. . The object detection device according to claim 1, further comprising:
An apparatus main body for holding the detection element, the lens, and the optical area exclusion member;
A cover that covers the device body and allows the detection wave to pass through;
The object detection apparatus, wherein the second engagement body is rotatably supported by the support body.   The object detection apparatus according to claim 4, wherein the rotation operation member is rotatably supported by the support body together with the second engagement body. In the object detection device according to any one of claims 1 to 5,
One of the first engagement body and the second engagement body has an engagement protrusion, and the other has an engagement groove with which the engagement protrusion is engaged with each other so as to be relatively movable. In the object detection device according to any one of claims 1 to 6,
The detection element is the light receiving element;
The plurality of lens segments are a plurality of light receiving lens segments that cause the detection waves reflected by objects in the plurality of detection areas to enter the light receiving element,
The object detection device, wherein the optical path shielded by the optical area exclusion member is an optical path passing through a lens segment of the light receiving lens.   The object detection apparatus according to claim 1, wherein the object detection apparatus is for an automatic door.

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