Detection Device

Abstract

To prevent a vehicle or the like from colliding with an opening / closing body, especially closed one, by using a sensor that sets a planar detection area.SOLUTION: A detection device comprises a sensor 4 for setting a planar detection area. The sensor 4 is provided in a portion above an opening that is opened and closed by an opening / closing body. The sensor 4 is attached so that a planar detection region forms an inclined surface that is inclined in a direction away from the opening from an upper side to a lower side of the opening. The range near the opening is set by the distance between the inclined surface and the opening. A target that has entered the area near the opening is detected by the inclined surface.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a detection device, and more particularly to a detection device provided on an opening / closing body such as a shutter. [Background technology]

[0002] Shutters that are opened and closed frequently, such as grill shutters installed at the entrances and exits of parking lots at apartment complexes, etc., require greater safety due to the high frequency of vehicles entering and exiting them, and for example, there is a need to prevent vehicles from colliding with the shutter when it is lowered.

[0003] Some of these shutters are equipped with a vehicle collision prevention measure that uses a microwave sensor. However, because a microwave sensor is a motion detection sensor, it can detect moving vehicles but cannot detect stationary vehicles, which is an issue.

[0004] Another method is to install a pole in front of both widthwise ends of the opening and provide a photoelectric sensor that forms an optical axis in the width direction of the opening to detect objects such as vehicles approaching the opening. However, due to the need for underground wiring for the photoelectric sensor and issues such as parking space, installation conditions are limited and in reality installation is often difficult.

[0005] A system (Patent Document 1) has been proposed that uses a sensor (e.g., a laser scanner sensor) that sets a planar detection area to control the opening and closing body, but since the laser scan sensor is provided below the guide rail, it narrows the opening width near the ground, raising concerns about contact with vehicles and people. In addition, since the laser scan sensor is provided on the guide rail, it is difficult to install the laser scan sensor when the guide rail is embedded, etc. [Patent Document 1] Patent Publication No. 2013-227827 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a detection device that uses a sensor that sets a planar detection area and yet is able to solve the above problems. [Means for solving the problem]

[0007] The technical means adopted in the present invention are: A detection device including a sensor that sets a planar detection area, The sensor is provided above an opening that is opened and closed by an opening / closing body, The sensor is attached so that the planar detection area forms an inclined surface that inclines downward from above the opening in a direction away from the opening, The detection device is configured such that a range near the opening is set by the distance between the inclined surface and the opening, and an object that enters the range near the opening is detected by the inclined surface. In one embodiment, when the sensor detects an object, a detection signal is sent from the detection device to a control unit, and the control unit regulates the closing operation of the opening / closing body according to the state of the opening / closing body. For example, when a detection signal is sent to the control unit while the opening / closing body is closed, the opening / closing body stops being closed, or reverses and opens after stopping. In one embodiment, the range near the opening is set by the distance between a lower portion of the inclined surface and the opening.

[0008] In one embodiment, the inclination of the inclined surface is variable. In a detection device installed on an opening / closing body that opens and closes different opening heights, a certain range near the opening can be set by changing the inclination of the inclined surface (planar detection area). When the inclination of the inclined surface is the same, the distance between the lower part of the inclined surface and the opening increases as the opening height increases, but by changing the inclination of the inclined surface when the opening height differs, the distance between the lower part of the inclined surface and the opening can be kept constant. By changing the inclination of the inclined surface (planar detection area), it is possible to set any range near the opening depending on the inclination.

[0009] In one embodiment, the sensor is attached to a mounting base fixed to the upper portion of the opening so that the angle can be adjusted, and the inclination of the inclined surface can be changed by adjusting the angle of the sensor relative to the mounting base.

[0010] In one embodiment, the lower end of the inclined surface does not reach the ground, and a non-detection area is provided near the ground. By providing the non-detection area near the ground, false detection such as false detection of floating objects blown up from the ground by wind is prevented.

[0011] In one embodiment, the sensor is a laser scanner sensor. In one embodiment, the object is a vehicle. In one embodiment, the opening and closing body is installed at the entrance and exit of a parking lot. In one embodiment, the opening / closing body is a grill shutter (pipe shutter). Effect of the Invention

[0012] The detection device according to the present invention uses a sensor that sets a planar detection area to prevent a vehicle or the like from colliding with an opening / closing body, particularly when the opening / closing body is closed. Furthermore, by using a sensor that sets a planar detection area, an object that enters the area near the opening can be detected whether it is moving or stationary, as long as it is at least partially located on an inclined surface (planar detection area). The inclined surface (planar detection area) can, for example, properly detect a protruding portion on the upper side of a vehicle body that protrudes forward beyond the vehicle body when the vehicle approaches the area near the opening. The sensor is provided above the opening that is opened and closed by the opening / closing body, so that the sensor does not get in the way when an object (an object or a person) passes through the opening.

[0013] In the case where the inclination of the inclined surface (planar detection area) is variable, even if a detection device is set on an opening / closing body that opens and closes different opening heights, by changing the inclination of the inclined surface (planar detection area), a constant range near the opening can be set regardless of the opening height. By changing the inclination of the inclined surface (planar detection area), it is possible to set any range near the opening depending on the inclination. [Brief description of the drawings]

[0014] [Figure 1] 1A and 1B are a side view and a front view of a shutter device equipped with a detection device according to the present embodiment, in which a detection area having an inclined surface shape is set by a sensor. [Diagram 2] 2A and 2B are a side view and a front view of a shutter device equipped with a detection device according to the present embodiment, showing a state in which a vehicle is detected in the mode shown in FIG. 1. [Diagram 3] 1. This is a side view and a front view of a shutter device equipped with a detection device according to the present embodiment, in which the opening height is larger than that in FIG. 1, and the inclination of the inclined detection area is set to be smaller. [Figure 4] 1A and 1B are a side view and a front view of a shutter device equipped with a detection device according to the present embodiment, in which a detection area having a substantially vertical plane is set by a sensor. [Diagram 5] These are side and front views of a shutter device equipped with a detection device of this embodiment. In the embodiment of Figures 1 to 4, the sensor is fixed to the underside of the lintel, whereas in the embodiment of Figure 5, the sensor is attached to the underside of the shutter case. [Figure 6] FIG. 4 is a partial enlarged view of a sensor mounting location in the side view of FIG. 3. [Figure 7] 2 is a partially enlarged view showing the attitude of the sensor in the embodiment shown in FIG. 1. [Figure 8] 4 is a partial enlarged view showing the attitude of the sensor in the embodiment shown in FIG. 3. [Figure 9] 5 is a partial enlarged view showing the attitude of the sensor in the embodiment shown in FIG. 4. [Figure 10] This is a partially enlarged side view showing the sensor mounting structure (fixing to the underside of the lintel). [Figure 11] FIG. 13 is a partially enlarged front view showing the sensor mounting structure (fixing to the underside of the lintel). [Figure 12] 1 is a partially enlarged side view showing the sensor mounting structure (fixing to the underside of the shutter case). FIG. [Figure 13] FIG. 4 is a cross-sectional view showing the positional relationship between the sensor and the embedded guide rail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] 1 to 4 are side and front views of a shutter device equipped with a detection device according to this embodiment, in which a shutter storage section is formed above the opening, and a winding shaft 1 is rotatably supported within the shutter storage section, and a shutter curtain 2 is wound up around the winding shaft 1. An opening / closing machine M is provided on one side of the opening width direction of the shutter storage section, and the winding shaft 1 is rotationally driven by the opening / closing machine M to wind up / unwind the shutter curtain 2.

[0016] Left and right guide rails 3 are erected at both widthwise ends of the opening, and the left and right guide rails 3 are adapted to receive and guide both widthwise ends of the shutter curtain 2 when the shutter curtain is raised or lowered. The guide rail 3 has a visible surface 30 located inside and outside the guide groove that receives the widthwise ends of the shutter curtain 2, a visible surface 31 facing the inside and outside of the opening, and a bottom surface 32 located at the bottom of the guide groove. When the guide rail 3 is installed in an embedded manner, the visible surface 31 and bottom surface 32 may be embedded in the wall or body W and not exposed to the outside (see FIG. 13).

[0017] For example, when a shutter equipped with the detection device according to the present embodiment is installed at the entrance and exit of a parking lot of an apartment building, the shutter may be a grill shutter (pipe shutter). However, the opening and closing body equipped with the detection device according to the present invention is not limited, and the opening and closing body may include slat shutters, sheet shutters, panel shutters, overhead doors, general shutters including pipe shutters, electric gates (sliding gates), and other opening and closing bodies.

[0018] In the shutter according to this embodiment, the shutter curtain 2 is opened by pressing a button on a single-point remote control operation unit. When the button on the operation unit is pressed with the opening fully closed, the opening / closing machine M is driven to rotate the winding shaft 1, raising the shutter curtain 2 and opening the opening. The opening is then kept fully open for a predetermined period of time, and after the predetermined period of time has elapsed, the shutter curtain 2 automatically descends to close the opening. Note that in addition to the remote control operation unit, an operation unit (not shown) may be provided on the frame, and in this case, the operation unit may be an operation unit equipped with an open button, a close button, and a stop button.

[0019] The shutter device according to this embodiment is equipped with a pinch prevention sensor S1 and a foreign object entrapment prevention sensor S2. The pinch prevention sensor S1 is a multi-axis photoelectric sensor consisting of multiple light projectors provided over a predetermined height below the projected surface 30 of one guide rail 3 and multiple light receivers provided over a predetermined height below the projected surface 30 of the other guide rail 3. When an object or person is located within the opening, the optical axis is blocked to detect the object or person, and a detection signal is sent to the control unit to regulate the descent of the shutter curtain 2.

[0020] The foreign object entanglement prevention sensor S2 is a photoelectric sensor consisting of a light spotter provided above the projected surface 30 of one guide rail 3 and a light receiver provided at a predetermined height above the projected surface 30 of the other guide rail 3.When the shutter curtain 2 is raised with a foreign object present, the foreign object is detected as the optical axis is blocked by the foreign object, and a detection signal is sent to the control unit, thereby regulating the rise of the shutter curtain 2.

[0021] The shutter device according to this embodiment includes a laser scanner sensor 4 that sets a planar detection area. The laser scanner sensor 4 is provided in an upper portion of the opening, and is attached so that the planar detection area forms an inclined surface (inclined surface P1 in FIG. 1 and inclined surface P2 in FIG. 3) that inclines from the upper portion of the opening downward in a direction away from the opening. In this embodiment, the laser scanner sensor 4 is provided at one end in the opening width direction above the opening, and forms a rectangular detection area from the corner of the upper end of the opening, and the rectangular detection area spreads over the entire width of the opening. The lower end of the inclined surface (inclined surfaces P1 and P2) does not reach the ground G, and a non-detection area Q is provided near the ground G. The non-detection area Q is set to prevent erroneous detection on the ground G, and the height of the non-detection area is, for example, about 300 mm.

[0022] In a detection device using a laser scanner sensor 4, the opening vicinity range is set by the horizontal distance between the inclined surface (inclined surface P1, P2) and the opening, and an object that enters the opening vicinity range is detected by the inclined surface. The opening vicinity range is set corresponding to an object (e.g., a vehicle) that enters and leaves the opening. The opening vicinity range is determined, for example, by the horizontal distance A (see Figures 1 and 3) from the opening (the center of the guide groove of the guide rail 3) to the lower end of the inclined surface. Since the inclined surface is an inclined straight line in a side view, the opening vicinity range can be uniquely set by determining the horizontal distance from the opening (the center of the guide groove of the guide rail 3) at any height of the inclined straight line.

[0023] If the detection target is a vehicle, the horizontal distance from the opening (the center of the guide groove of the guide rail 3) to the lower end of the inclined surface is set to, for example, about 1400 mm. Therefore, as shown in FIG. 2, when a vehicle enters the area near the opening, the vehicle is detected by the laser scanner sensor 4 and a detection signal is transmitted to the control unit. Also, when a vehicle having a protruding portion on the upper side of the vehicle body that protrudes forward from the vehicle body approaches the area near the opening, the inclined surface (planar detection area) detects the protruding portion above the forward portion of the vehicle body, so that the vehicle can be detected at an appropriate position.

[0024] The following describes the shutter control when the control unit receives a detection signal from the laser scanner sensor 4. The laser scanner sensor 4 is always in a detection-enabled state regardless of whether a signal is input from the operation unit, and when the laser scanner sensor 4 detects an object, it transmits a detection signal to the control unit. However, the shutter control based on the detection signal from the laser scanner sensor 4 differs depending on the state of the shutter when the control unit receives the detection signal, as described below.

[0025] If the laser scanner sensor 4 detects an object (for example, a vehicle approaching the opening) during the shutter closing operation, the control unit receives the detection signal and controls the shutter curtain 2 to stop descending, then reverse and rise, and then stop when the opening is fully open. Therefore, when the shutter curtain 2 is descending and a vehicle approaches the opening and enters the area near the opening, the laser scanner sensor 4 detects the vehicle and sends a detection signal to the control unit, which stops the shutter curtain 2 descending, then reverses and rises, and then rises to the area fully open, so that the vehicle that has entered the area near the opening can pass through the open opening without colliding with the shutter curtain 2 descending.

[0026] When the opening is fully open, if the laser scanner sensor 4 detects an object (for example, a vehicle approaching the opening or a vehicle parked near the opening), the shutter curtain 2 does not descend.

[0027] Furthermore, when the opening is fully open, for example, if a vehicle stops straddling the opening and is not detected by the laser scanner sensors 4 inside and outside the opening, the vehicle is detected by the entrapment prevention sensor S1 and the shutter curtain 2 does not descend. If an object is detected by the laser scanner sensor 4 and at the same time the object blocks the optical axis of the entrapment prevention sensor S1, the object can be detected by both the laser scanner sensor 4 and the entrapment prevention sensor S1. Regardless of which sensor detects the object, the descent of the shutter curtain 2 is restricted, but which sensor's detection signal is to be given priority can be appropriately set by a person skilled in the art.

[0028] The laser scanner sensor 4 according to this embodiment is mainly for preventing a vehicle from colliding with the shutter curtain during lowering, and the laser scanner sensor 4 does not operate as a start switch. When the opening is fully closed, for example, even if a vehicle is detected by the laser scanner sensor 4, the shutter curtain 2 does not rise, and the shutter curtain 2 starts to rise in response to an opening signal from the operation unit, and a vehicle that has entered the range near the opening can pass through the opened opening. Even if the laser scanner sensor 4 detects an object (for example, a vehicle approaching the opening) during the shutter opening operation, the shutter curtain 2 continues to rise, and a vehicle that has entered the range near the opening can pass through the opened opening.

[0029] In this embodiment, the planar detection area set by the laser scanner sensor 4, that is, the inclination of the inclined surface (inclined surface P1 in FIG. 1, inclined surface P2 in FIG. 3) is variable. By making the inclination of the inclined surfaces P1 and P2 variable, it is possible to set a constant detection range (range near the opening) even when the opening height opened and closed by the shutter is different. When the inclination of the inclined surface formed by the laser scanner sensor 4 is the same, the horizontal distance between the lower part of the inclined surface and the opening increases as the opening height increases, but by making the inclination of the inclined surface different when the opening height is different, it is possible to keep the horizontal distance between the lower part of the inclined surface (assumed detection part) and the opening constant regardless of the opening height. As is clear from a comparison between FIG. 1 and FIG. 3, in the embodiment of FIG. 3, the height dimension of the opening is larger than the height dimension of the opening in the embodiment of FIG. 1. In the embodiment of Figure 3, by making the inclination (angle with respect to the horizontal plane) of inclined surface P2 larger (in the direction closer to the vertical plane) than the inclination (angle with respect to the horizontal plane) of inclined surface P1 in the embodiment of Figure 1, a constant detection range (horizontal distance A that determines the range near the opening) can be set in the embodiments of Figures 1 and 3 regardless of the opening height.

[0030] Also, by changing the inclination of the inclined plane-like detection area, it is possible to set any range near the opening depending on the inclination. For example, if the entrance / exit of a parking lot is close to a road, it is possible to prevent false detection due to people or objects located on the road by increasing the inclination (angle with respect to the horizontal plane) of the detection area (in a direction approaching a vertical plane). Furthermore, as shown in FIG. 4, by making the planar detection area a substantially vertical plane P3, the laser scanner sensor 4 can also be used as a pinch prevention sensor.

[0031] A specific configuration (angle adjustment mechanism) for the inclination of the planar detection area (inclined surface) set by the laser scanner sensor 4 according to this embodiment will be described. The laser scanner sensor 4 according to this embodiment comprises a sensor body 5 and a mounting bracket 6, and is attached to a mounting base 7 fixed to an upper portion of the opening via the mounting bracket 6 so that the angle can be adjusted. By adjusting the mounting angle of the laser scanner sensor 4 (sensor body 5 + mounting bracket 6) relative to the mounting base 7, the inclination of the planar detection area (inclined surfaces P1, P2, vertical surface P3) irradiated from the sensor body 5 can be changed.

[0032] The mounting base 7 comprises a vertical base edge 70, vertical side edges 71 extending in opposing directions from both ends of the base edge 70 in the width direction, and a horizontal upper edge 72 formed at the upper end of the base edge 70, and is attached in a hanging manner to the upper end of the opening by fixing the upper edge 72 to the upper part of the opening. Examples of the upper part of the opening to which the upper edge 72 of the mounting base 7 is fixed include the lower surfaces 80 and 90 of the lintel and the lower surface 100 of the shutter case, as described later.

[0033] The laser scanner sensor 4 is fixed in a predetermined position to the mounting base 7 by the upper pivot shaft 60 and the lower angle adjustment fixed shaft 61, with the mounting bracket 6 positioned between the sides 71 of the mounting base 7. More specifically, the laser scanner sensor 4 is supported rotatably relative to the mounting base 7 via the upper pivot shaft 60, an arc-shaped guide groove 73 is formed on the opposing sides 71 with the pivot shaft 60 as the center, and the lower angle adjustment fixed shaft 61 is movable within the guide groove 73 and can be fixed in position.

[0034] At least one side 71 has a plurality of marks 74 along the guide groove 73 to indicate the angle. The laser scanner sensor 4 is rotated so that the angle adjustment fixed shaft 61 coincides with a predetermined mark 74, and the angle adjustment fixed shaft 61 is fixed at a desired position. In the embodiment shown in FIG. 7, the angle adjustment fixed shaft 61 coincides with the second mark 74 from the right, the laser scanner sensor 4 is fixed at a predetermined angle with respect to the vertical plane, and the laser emitted from the laser scanner sensor 4 forms an inclined plane P1. In the embodiment shown in FIG. 8, the angle adjustment fixed shaft 61 coincides with the fourth mark 74 from the left, the laser scanner sensor 4 is fixed at a predetermined angle with respect to the vertical plane, and the laser emitted from the laser scanner sensor 4 forms an inclined plane P2. In the embodiment shown in FIG. 9, the angle adjustment fixed shaft 61 coincides with the first mark 74 from the left, the laser scanner sensor 4 is fixed in a substantially vertical position, and the laser emitted from the laser scanner sensor 4 forms a vertical plane P3. In the illustrated embodiment, eight marks 74 are provided, but there is no limitation on the number of marks 74. Furthermore, the shape of the marks 74 is not limited to that shown in the drawing.

[0035] Angle adjustment fixed shaft 61 is composed of, for example, a screw 61', and the position of the shaft portion (angle adjustment fixed shaft 61) is fixed by tightening the screw 61' and pressing the head of the screw 61' against the side edge 71 (a washer may be used), and by loosening the screw 61', the shaft portion (angle adjustment fixed shaft 61) becomes movable along the guide groove 73. Also, the rotating support shaft 60 may be composed of the shaft portion of a screw 60'.

[0036] In this embodiment, two laser scanner sensors 4 are provided on one side in the opening width direction at the upper portion of the opening, positioned inside and outside the guide groove of the guide rail 3. In this embodiment, the laser scanner sensors 4 are provided on the side where the opening / closing device M is provided, so that electrical wiring 40 between the laser scanner sensors 4 and a control unit (not shown) provided near the opening / closing device M can be smoothly performed. Note that one (outer) laser scanner sensor 4 is omitted in Fig. 10.

[0037] In the embodiment shown in Figs. 1 to 4, the shutter storage section is formed in the ceiling CL, and as shown in Fig. 6, an inner lintel (case lintel) 8 and an outer lintel 9 are provided in the upper part of the opening, and an elevator path for the shutter curtain 2 is formed between them. The inner lintel 8 has a horizontal lower surface 80, which is exposed in the upper part of the opening. The outer lintel 9 has a horizontal lower surface 90, which is exposed in the upper part of the opening. The mounting base 7 of the outer laser scanner sensor 4 is attached so as to hang down from the lower surface 90 close to the upper end of one of the guide rails 3 by fixing the upper side 72 to the lower surface 90 of the outer lintel 9 at one end in the opening width direction. One side side 71 of the mounting base 7 of the outer laser scanner sensor 4 is close to or in contact with the outer projected surface 30 of the guide rail 3. The mounting base 7 of the inner laser scanner sensor 4 is attached so as to hang down from the lower surface 80 close to the upper end of one of the guide rails 3 by fixing an upper edge 72 to the lower surface 80 of the inner lintel 8 at one end in the opening width direction. One side edge 71 of the mounting base 7 of the inner laser scanner sensor 4 is close to or in contact with the inner projected surface 30 of the guide rail 3.

[0038] The laser scanner sensor 4 comprises a scanner body 5 and a mounting bracket 6, and is provided above the opening and at one end in the opening width direction by fixing the mounting bracket 6 to a mounting base 7. The laser scanner sensor 4 is provided at a corner at one end in the opening width direction at the upper end of the opening, and is prevented as much as possible from coming into contact with objects or people passing through the opening. The laser scanner sensor 4 according to this embodiment forms a rectangular detection area, so that the detection area irradiated by the laser scanner sensor 4 provided at the corner is formed in a planar spread so as to cover the entire width of the opening.

[0039] A groove or opening is formed on the upper edge 72 of the mounting base 7, through which the wiring 40 of the laser scanner sensor 4 is inserted, and insertion portions 81, 91 (see Figure 6) for the wiring 40 are formed on the undersides 80, 90 of the lintels.The wiring 40 of the laser scanner sensor 4 passes through the groove and insertion portions 81, 91 and extends into the shutter storage portion (see Figure 10) and is electrically connected to a control portion (not shown) near the opening and closing mechanism M.

[0040] In the embodiment shown in Fig. 5, the shutter case 10 is attached to the frame W, and the internal space of the shutter case 10 serves as a shutter storage section. In the embodiments shown in Figs. 1 to 4, the laser scanner sensor 4 is fixed to the lintel undersides 80, 90, whereas in the embodiment shown in Fig. 5, the laser scanner sensor 4 is attached to the underside 100 of the shutter case 10. More specifically, the upper side 72 of the mounting base 7 is fixed to one end portion in the opening width direction of the shutter case underside 100. An insertion portion for the wiring 40 is formed in the shutter case underside 100, and the wiring 40 of the laser scanner sensor 4 extends into the shutter case 10 through the groove and the insertion portion (see Fig. 12).

[0041] The laser scanner sensor 4 according to this embodiment is attached to the upper part of the opening in a state where it is located inside the upper end part of the projected surface 30 of one guide rail 3 (the side where the opening / closing machine M is provided), and in the illustrated embodiment, one side edge 71 of the mounting base 7 is close to or in contact with the upper end part of the projected surface 30 of the guide rail 3, and the laser scanner sensor 4 is close to the upper end part of the projected surface 30 of the guide rail 3. In this way, by providing the laser scanner sensor 4 at the upper part of the opening (lintel lower surfaces 80, 90 or shutter case lower surface 100) and located inside the projected surface 30 of the guide rail 3, the laser scanner sensor 4 can be installed without being restricted by the on-site finishing of the shutter device (embedding of the guide rail, exterior wall tile finishing, etc.).

[0042] For example, as shown in FIG. 13, when the guide rail 3 is installed in an embedded manner, the visible surface 31 and the bottom surface 32 of the guide rail 3 may be embedded in a wall or a building frame W and not exposed to the outside. Even in such an embedded guide rail 3, by providing the laser scanner sensor 4 in the upper part of the opening (lintel lower surface 80, 90 or shutter case lower surface 100), the shutter device is not limited by the on-site finishing (embedding of the guide rail). Also, in the embedded guide rail 3, the visible surface 30 is exposed to the outside, so the laser scanner sensor 4 can be placed close to the upper end of the visible surface 30. The laser scanner sensor 4 provided at the upper corner of the opening does not spoil the appearance of the shutter device, and does not come into contact with objects or people passing through the opening to impede their passage. [Explanation of symbols]

[0043] 3 Guide rail 30 Prospect 4 Laser Scanner Sensor 5 Sensor body 6 Mounting bracket 7 Mounting stand 8 Inner Lintel 80 Bottom 9. Outer Lintel 90 Bottom surface 10 Shutter Case 100 Bottom A Distance between the inclined surface and the opening P1, P2 sloped surface Q Non-detection area

Claims

1. A detection device including a sensor that sets a planar detection area, The sensor is provided above an opening that is opened and closed by an opening / closing body, the sensor is attached so that the planar detection area has a rectangular shape in a front view so as to cover an entire width of the opening, and forms an inclined surface that inclines downward from above the opening in a direction away from the opening, a range near the opening is set by a distance between the inclined surface and the opening, and an object that has entered the range near the opening is detected by a planar detection area formed by the inclined surface, If an object is detected during the closing operation of the opening and closing body, the opening and closing body will stop descending and reverse and rise. Detection device.

2. The sensing device of claim 1 , wherein the inclination of the inclined surface is variable.

3. A detection device including a sensor that sets a planar detection area, The sensor is provided above an opening that is opened and closed by an opening / closing body, the sensor is attached so that the planar detection area forms an inclined surface that inclines downward from above the opening in a direction away from the opening, a range near the opening is set by a distance between the inclined surface and the opening, and an object that has entered the range near the opening is detected by a planar detection area formed by the inclined surface, If an object is detected during the closing operation of the opening and closing body, the opening and closing body will stop descending, reverse and rise, The inclination of the planar detection area formed by the inclined surface is variable, and the distance between the lower end of the inclined surface and the opening can be set to a constant value regardless of the opening height of the opening. Detection device.

4. The sensor is attached to a mounting base fixed to an upper portion of the opening in an angle-adjustable manner, and the inclination of the inclined surface is variable by adjusting the angle of the sensor with respect to the mounting base.

4. The detection device according to claim 2 or 3.

5. The lower end of the inclined surface does not reach the ground, and a non-detection area is provided near the ground. A detection device according to any one of claims 1 to 4.

6. A detection device including a sensor that sets a planar detection area, The sensor includes an outer sensor and an inner sensor provided above the opening that is opened and closed by the opening / closing body, The outer sensor is attached so that the planar detection area forms an outer inclined surface that inclines outwardly from above the opening downward in a direction away from the opening, A range near the opening is set by a distance between the outer inclined surface and the opening, and an object that enters the range near the opening is detected by a planar detection area formed by the outer inclined surface; the inner sensor is attached so that the planar detection area forms an inner inclined surface that inclines inwardly from above the opening downward in a direction away from the opening, A range near the opening is set by a distance between the inner inclined surface and the opening, and an object that has entered the range near the opening is detected by a planar detection area formed by the inner inclined surface, If an object is detected during the closing operation of the opening and closing body, the opening and closing body will stop descending and reverse and rise. Detection device.

7. An opening / closing mechanism is provided at an upper portion of the opening, the opening being positioned on one side in the opening width direction, The outer sensor and the inner sensor are both provided at one side in the opening width direction where the opening / closing device is provided.

7. The detection device of claim 6.

8. A detection device as described in any one of claims 1 to 7, wherein when an object is detected during the closing operation of the opening / closing body, the opening / closing body stops descending, reverses and rises, and the opening is fully open.

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