JP2020148034A - Opening and closing device - Google Patents

Abstract

To reduce sensor failures due to flooding.SOLUTION: An opening and closing device has an opening and closing body 10 that closes downward so as to separate a space, and an object detecting sensor 40 that detects an object in the vicinity of the opening and closing body 10. A water stop 12 of a predetermined height is disposed on a lower side of the opening and closing body 10 with one side of a space that is separated in a fully-closed state regarded as a flooding expected area so as to prevent water accumulated in the flooding expected area from flowing into the other side of the space. In the object detecting sensor 40, connection portions 40a2 and 40b2 of electrical wires e1 and e2 are disposed above a top edge of the water stop 12 located at a fully-closed position.SELECTED DRAWING: Figure 1

Description

The present invention relates to an opening / closing device such as a shutter device or an overhead door that closes an opening / closing body so as to partition a space.

Conventionally, in this type of invention, for example, as described in Patent Document 1, a water stop plate is provided on the lower end side of an opening / closing body that closes by partitioning a space, and the water stop plate provides an external surface when fully closed. There is a shutter device for the garage that prevents water from entering the garage.
In such a shutter device, an object having a different height, such as a person or a car, passes through the opening when the opening / closing body is opened. Therefore, it is required to detect an object in a range extending in the vertical direction of the opening.

As described above, as a shutter device capable of detecting objects having different heights, for example, there is one described in Patent Document 2. This shutter device is provided with a multi-optical axis sensor extending in the vertical direction in the left and right guide rails. In this multi-optical axis sensor, a large number of optical paths arranged in the vertical direction are formed by a large number of light emitting units and light receiving units arranged in the vertical direction, and one of these many optical paths is blocked by an object. Sends a sensing signal to.

Japanese Unexamined Patent Publication No. 2016-204843 JP-A-2010-77752

By the way, when the multi-optical axis sensor is provided in the former shutter device, water having a high water level outside the garage flows into the gap between the guide rail and the opening / closing body and adheres to the multi-optical axis sensor, resulting in a short circuit or insulation. It may contribute to defects.

In view of such problems, the present invention has the following configurations.
In a switchgear provided with an opening / closing body that closes downward so as to partition a space and an object sensing sensor that detects an object in the vicinity of the opening / closing body, the lower side of the opening / closing body is partitioned when fully closed. A water stop plate of a predetermined height is provided so that the space on one side is regarded as an assumed inundation area and the water accumulated in the assumed inundation area does not flow into the space on the other side, and the object detection sensor is in a fully closed position. A switchgear characterized in that a connection portion of electrical wiring is arranged above the upper end of the water stop plate in the above.

Since the present invention is configured as described above, it is possible to reduce sensor defects due to flooding.

It is a front view which shows an example of the switchgear which concerns on this invention. It is a vertical cross-sectional view of a main part of the switchgear, (a) shows a state before fully closed, and (b) shows a fully closed state. It is a cross-sectional view of a main part of the switchgear. It is a perspective view which shows an example of a light-shielding member. It is a flowchart which shows an example of the obstacle detection operation of a sensor control circuit, (a) shows the case of a blanking control mode, and (b) shows the case of a normal detection mode. It is a structural drawing which shows the mode in which the object detection sensor is housed in a storage case by notching a main part. It is a side view which shows another example of the switchgear which concerns on this invention.

In this embodiment, the following features are disclosed.
The first feature is in an opening / closing device including an opening / closing body that closes downward so as to partition a space and an object sensing sensor that detects an object in the vicinity of the opening / closing body. , The space on one side partitioned when fully closed is regarded as an assumed inundation area, and a water stop plate having a predetermined height is provided so as to prevent the water accumulated in the assumed inundation area from flowing into the space on the other side. The sensor has an electrical wiring connection portion located above the upper end of the water stop plate in a fully closed position (see FIG. 1).
According to this configuration, even if water collects in the assumed inundation area when the opening / closing body is fully closed, it is possible to prevent the connection portion of the electrical wiring of the multi-optical axis sensor from being inundated and causing a short circuit or poor insulation. it can.

As a second feature, the object sensing sensor is provided in the space on the other side in order to prevent the multi-optical axis sensor from being flooded more effectively (see FIGS. 2 and 3).

As a third feature, in order to obtain a more remarkable action effect, the object sensing sensor forms a large number of optical paths by a pair of light emitting parts and a light receiving part arranged in a large number in the vertical direction, and at least one of these paths. It is a multi-optical axis sensor that detects that an object blocks the part (see FIGS. 1 and 2).

As a fourth feature, in order to further improve the waterproof effect, the object sensing sensor includes a control circuit that outputs a signal according to the sensing state, and this control circuit is attached to the upper end of the water stop plate in a fully closed position. It is located above (see FIGS. 1 and 2).

As a fifth feature, in order to further improve the waterproof property, the object detection sensor is provided in a hollow waterproof case, and the waterproof case is at least more than the upper end of the water stop plate in the fully closed position. It is formed in a hollow box shape that watertightly covers the object detection sensor on the lower side, and has a light-transmitting portion that enables the formation of the optical path on the outer wall portion thereof (see FIG. 6).

<Specific embodiment>
Next, a specific embodiment having the above characteristics will be described in detail with reference to the drawings. In the following description, the "opening / closing body thickness direction" means the thickness direction of the opening / closing body in the closed state. Further, the "opening / closing body width direction" means a direction substantially orthogonal to the opening / closing direction of the opening / closing body, not a direction in which the opening / closing body is thick. Further, the "opening / closing direction" means a direction in which the opening / closing body slides to partition or open the space.

FIG. 1 shows an example of a switchgear according to the present invention.
The opening / closing device 1 has an opening / closing body 10 that closes by partitioning a space, a storage portion 20 that stores / extends the opening / closing body 10 on the opening direction side, and both ends of the opening / closing body 10 in the lateral width direction. Detects two guide rails 30, 30 that are surrounded by concave cross sections and guide them in the vertical direction, a lower frame portion 35 (see FIG. 2) that faces the lower end portion of the opening / closing body 10, and an object in the vicinity of the opening / closing body 10. It includes an object sensing sensor 40 (multi-optical axis sensor) and a control circuit 50.
The switchgear 1 is attached to an opening of a skeleton such as a garage or a factory, and considers a space on one side (outdoor side according to FIG. 3) that is partitioned when fully closed as an inundation assumption area, and uses the inundation assumption area. A water-stop shutter device is configured in which the water-stop plate 12 prevents the accumulated water from flowing into the space on the other side (indoor side according to FIG. 3).

The opening / closing body 10 constitutes the opening / closing body 11 by connecting a plurality of slats 11a formed by bending a horizontally long substantially rectangular metal plate so as to rotate between vertically adjacent slats 11a and 11a. A water stop plate 12 having a predetermined height is connected to the lower end of the opening / closing body 11.

The water stop plate 12 includes the water stop plate main body 12a, the water stop portions 12b and 12c (see FIGS. 2 and 3) that come into contact with the guide rail 30 and the lower frame portion 35 to ensure watertightness, and the other side (see FIGS. 2 and 3). According to FIG. 2, it is provided with a light-shielding portion 12d that projects to the right side) and blocks a part of a large number of optical paths R by the object detection sensor 40.

The water stop plate main body 12a is a member formed in a rectangular flat plate shape having no portion penetrating in the thickness direction, and both end sides in the width direction are fitted to the guide rails 30 and 30.
The water stop plate main body 12a may be a single or a plurality of metal plates appropriately processed so as not to have gaps or holes in the thickness direction.

The water blocking portions 12b and 12c are made of a long rubber material.
One of the water blocking portions 12b is arranged on both end sides of the water blocking plate main body 12a in the lateral width direction in a long shape continuous in the vertical direction. As shown in FIG. 3, the water stop portion 12b is integrally fixed to the water stop plate main body 12a via a bracket 12e fixed to the widthwise end portion of the water stop plate main body 12a.
The other water stop portion 12c is arranged on the lower end side of the water stop plate 12 in a long shape continuous in the width direction of the opening / closing body. The water stop portion 12c is integrally fixed to the water stop plate 12 by a bracket or the like (not shown).

The light-shielding portion 12d is a member that protrudes from the surface of the water-stop plate main body 12a and closes two optical paths R and R that are vertically adjacent to each other, and is slightly above the lower end of the water-stop plate main body 12a on one end side in the width direction of the opening / closing body. To position.
As illustrated in FIG. 4, the light-shielding portion 12d has a vertical cross-sectional trapezoidal shape having inclined surfaces at the top and bottom, and is formed to have a predetermined horizontal width dimension.
According to a preferred example of the present embodiment, the light-shielding portion 12d is made of an elastic material such as an elastic synthetic resin material (including, for example, synthetic rubber and an elastomer resin), but as another example, it is made of a hard synthetic resin material. It is also possible to use an embodiment or an embodiment made of a metal material.
The means for fixing the light-shielding portion 12d to the surface of the water stop plate main body 12a may be, for example, adhesion, fitting, or fastening with an appropriate fastener (for example, screws, bolts, rivets, brackets, etc.).

Further, the storage portion 20 has a winding shaft 22 for winding and feeding the opening / closing body 10 and a winding shaft 22 in a storage case 21 having an opening for retracting the opening / closing body 10 at the lower part. It includes an opening / closing device 23 that drives, rotates, and brakes via a power transmission mechanism such as a chain and a sprocket, and an opening / closing body control circuit 51 that is a part of the control circuit 50 (see FIG. 1).

The switch 23 is composed of a rotary electric motor, a braking mechanism, and the like.
The switch 23 is provided with a fully closed fully open sensing unit 23a that outputs contact signals at the fully closed and fully open positions of the switch 10. The fully closed and fully open sensing unit 23a is a switch having a mechanical counter structure that outputs a contact signal when the amount of rotation of the rotating portion of the switch 23 reaches a predetermined value.

The opening / closing body control circuit 51 is, for example, an electronic circuit provided with a microcomputer or the like, and by functioning with a program stored in advance, a closing operation limiting signal from the object detection sensor 40, an opening switch, a stop switch, and a closing switch (not shown) are used. Signal, other signals, etc. are processed, and the switch 23 is controlled according to the processing result.

Further, the guide rail 30 is configured to guide the opening / closing body 10 in the vertical direction by concavely surrounding the end portion in the width direction of the opening / closing body 10 on one side opposite to the one side in the opening / closing body width direction.
On the lower end side of the guide rail 30, there is a water stop plate guide portion 31 that fits in a concave shape with respect to the width direction end portion of the water stop plate 12 and guides the water stop plate 12 in the vertical direction while maintaining watertightness. Provided. Further, on the indoor side surface of the guide rail 30, a sensor accommodating portion 32 accommodating the object sensing sensor 40 is provided (see FIG. 3).
Then, the guide rail 30 is fixed to the wall surface (not shown) of the skeleton to which the switchgear 1 is mounted via a bracket (not shown) or the like.

The water stop plate guide portion 31 is formed in a concave cross section surrounding the widthwise end portion of the water stop plate 12 (see FIG. 3), and extends in the vertical direction. On the lower end side of the water stop plate guide portion 31, the inner surface of the water stop plate 12 facing the surface of the water stop plate 12 facing the inundation assumption region side is slidably contacted with the lower end side of the water stop plate 12 and the water stop plate 12 is provided by an inclined surface. A guide portion 31a for guiding downward is provided.

The sensor accommodating portion 32 is a long member that is continuous in the opening / closing direction of the opening / closing body along the indoor side surface of the guide rail 30, and is fixed to the guide rail 30 by fasteners such as screws and rivets.
The sensor accommodating portion 32 is composed of an accommodating case portion 32a having a concave cross section having an opening facing the indoor side, and a cover portion 32b that is detachably attached so as to close the opening.

The storage case portion 32a has a plurality of through holes 32a1 arranged at intervals in the vertical direction on the side wall on the opening / closing body center direction side in the opening / closing body width direction. Each through hole 32a1 is a hole for passing a light ray of the object detection sensor 40 described later (see FIG. 3).

One end side of the cover portion 32b in the width direction of the opening / closing body is detachably fitted to the accommodating case portion 32a, and the other end side is fastened to the accommodating case portion 32a by a detachable fastener such as a screw or a bolt. (See Fig. 3).

Further, the lower frame portion 35 is continuous between the left and right guide rails 30 and 30 on the lower end side of the opening opened and closed by the opening / closing body 10, and faces the lower end surface of the opening / closing body 10 when fully closed. Provided.
The lower frame portion 35 is provided with a projecting piece portion 35a that projects upward on the indoor side of the opening / closing body 10. The projecting piece portion 35a is continuous along the opening / closing body 10 in the opening / closing body width direction. The projecting piece portion 35a comes into watertight contact with the water blocking portion 12c on the lower end side of the opening / closing body 10 when fully closed (see FIG. 2B).

Therefore, when the opening / closing body 10 is fully closed, the water stop portion 12b is pressed against the inner surface of the water stop plate guide portion 31 on the end side in the lateral width direction (see FIG. 3), and the water stop portion 12c is on the lower frame portion 35 on the lower end side. (See FIG. 2), the gaps on both sides and the lower end of the water stop plate 12 are substantially closed. Therefore, even if rainwater or the like collects on the inundation assumption area side (outdoor side according to the illustrated example), this water is prevented from entering the indoor side.

The object detection sensor 40 includes a pair of light emitting units 40a1 and light receiving units 40b1 (photoelectric sensors) that are lined up in a large number in the vertical direction close to the water blocking plate 12 from the indoor side, and the indoor side shown from the water blocking units 12b and 12c. Displaced apart from.
The object sensing sensor 40 forms a large number of optical paths R by the light emitting unit 40a1 and the light receiving unit 40b1, and senses that an object blocks at least a part of these many optical paths.

More specifically, the object sensing sensor 40 includes a first unit 40a extending in the vertical direction in the guide rail 30 on one side and a first unit 40a extending in the vertical direction in the guide rail 30 on the opposite side. The second unit 40b is provided, and a large number of optical paths R arranged at intervals in the vertical direction are formed in the opening / closing path of the opening / closing body 10.
The signal output from the object detection sensor 40 is treated as a closing operation limiting signal for limiting the closing operation of the opening / closing body 10.

The first unit 40a and the second unit 40b are located at positions separated from the seating target portion G (for example, the lower frame, the floor surface, the ground, etc.) of the opening / closing body 10 when fully closed by a predetermined dimension H on the opening direction side, respectively. Then, it is fixed in the sensor accommodating portion 32.
The predetermined dimension H is set in the range of 150 to 1500 mm, more preferably in the range of 150 to 500 mm.

The first unit 40a is formed in a rectangular shape elongated in the vertical direction, and has a large number of light projecting portions 40a1 at substantially constant intervals in the longitudinal direction thereof. The light projecting unit 40a1 is supplied with electric power from the electric wiring e1 in the sensor accommodating unit 32 to emit light (for example, infrared rays) as an obstacle detection medium.
The connection portion 40a2 between the electric wiring e1 and the first unit 40a is located above the upper end of the water stop plate 12 in the fully closed position.

The second unit 40b is configured in a rectangular shape that is long in the vertical direction, and outputs signals according to a large number of light receiving units 40b1 that are spaced at substantially a certain interval in the longitudinal direction thereof and the sensing state of these light receiving units 40b1. The sensor control circuit 41 is provided, and the output signal of the sensor control circuit 41 is guided to the control circuit 50 in the housing 20 by the electric wiring e2.
The connection portion 40b2 of the electric wiring e2 and the second unit 40b, and the sensor control circuit 41 are located above the upper end of the water stop plate 12 in the fully closed position.

Further, a power supply circuit, an amplifier, other electronic circuits, etc. (not shown) that supply power to the first unit 40a and / or the second unit 40b are also provided from the upper end of the water stop plate 12 in the fully closed position. Is also placed on the upper side.

Further, the control circuit 50 is composed of the switchgear control circuit 51 and the sensor control circuit 41 described above, and controls the operation of the switchgear 1 by the cooperation of these two control circuits 51 and 41.
If the control circuit 50 is arranged above the water stop plate 12 in the fully closed position, the control circuit 50 may have a single or three or more configurations (not shown).
When a plurality of control circuits 50 are used, the division of functions such as the blanking mode, the normal sensing mode, and other controls, which will be described later, can be arbitrarily set.
When the control circuit 50 is singular, the singular control circuit (for example, the opening / closing body control circuit 51) controls all of the blanking mode, the normal sensing mode, and the like, which will be described later.

Next, the basic operations of the sensor control circuit 41 and the opening / closing body control circuit 51 will be described.
The sensor control circuit 41 executes either one of the blanking control mode and the normal sensing mode according to a predetermined condition.

<About blanking control mode>
The blanking control mode is a mode executed when the light-shielding portion 12d passes through a large number of optical paths R of the object detection sensor 40 during the closing operation of the opening / closing body 10.
In this blanking control mode, the sensor control circuit 41 includes each of two or more or some of the optical paths blocked by the light-shielding unit 12d in the order of the closing direction, and includes these blocked optical paths. The presence or absence of blocking is ignored for the optical path located closer to the opening direction, and the output of the closing operation restriction signal described later is turned ON or OFF depending on the presence or absence of blocking for the optical path on the closing direction side of the ignored optical path. ..
Here, the "optical path including the blocked optical path and located closer to the opening direction" is the lower side of the two optical paths blocked in the order of the closing direction by the light-shielding portion 12d according to an example shown in FIG. All optical paths above the optical path R1 adjacent to.

In addition, as another example other than the illustrated example, all the optical paths located above the optical path R1 without including the optical path R1 include the "optical path including the blocked optical path and located closer to the opening direction". It is also possible to.

The closing operation limiting signal is a signal for limiting the closing operation of the opening / closing body 10, and may be, for example, a contact signal that changes between an OFF state and an ON state, a voltageed signal, or the like.

To specifically explain the obstacle detection operation in the blanking control mode, as shown in FIG. 5A as an example, the sensor control circuit 41 includes a predetermined number of sensor control circuits 41 below the optical path R1 directly below the light-shielding portion 12d. It is determined whether or not at least one of the optical paths R of the above is blocked (step S1), and if it is blocked, the output of the closing operation limiting signal is turned ON (step S2), and if it is not blocked, the closing operation limiting signal is turned on. Output is turned off (step S3). After that, the process returns to step S1.
In an example of the present embodiment, of the plurality of optical paths R, the lowermost two optical paths R are dedicated to detecting that the light-shielding portion 12d has reached the lower end side of the object detection sensor 40, and are obstacles. Although it is not detected, as another example, these two optical paths R can also be used for obstacle detection.

<About normal detection mode>
The normal sensing mode is a mode that is executed when a reset operation is performed under a predetermined condition. The predetermined condition may be, for example, a signal when the power is turned on, a signal when the uppermost two optical paths R are sequentially blocked in the closing direction, and the like.
In this normal sensing mode, the sensor control circuit 41 turns on or off the output of the closing operation limiting signal for a large number of normal sensing optical paths R regardless of the order of the closing directions, depending on the presence or absence of at least a part of interruption. To.
Here, the "normal sensing optical path R" is a plurality of optical paths R located between the upper and lower two optical paths R and R closest to the opening direction and the upper and lower two optical paths R and R closest to the closing direction. is there. The two upper and lower optical paths R and R closest to the opening direction and the two upper and lower optical paths R and R closest to the closing direction detect the light-shielding portion 12d entering and exiting the sensing area of the object detection sensor 40. Used.

As shown in the flowchart of FIG. 5B, in the normal sensing mode, the sensor control circuit 41 determines whether or not at least a part of the plurality of normal sensing optical paths R is blocked, and is blocked. If so, the process proceeds to step S22 to turn on the output of the closed operation limit signal, and if not, the process proceeds to step S23 to turn off the output of the closed operation limit signal. Then, after this, the process is returned to step S21.

Then, when the closing operation limiting signal is input from the sensor control circuit 41, the opening / closing body control circuit 51 stops the closing operation of the opening / closing body 10 under the control of the switch 23, or receives a closing signal by a closing switch or the like. Even in such a case, the closing operation of the opening / closing body 10 is restricted, such as prohibiting the closing operation of the opening / closing body 10.
It should be noted that the opening / closing body 10 can be stopped by operating a stop switch (not shown) at any of the above-mentioned steps.

Next, the characteristic action and effect of the switchgear 1 having the above configuration will be described in detail.
According to the switchgear 1 having the above configuration, the object detection sensor 40 is separated from the water blocking portions 12b and 12c in the space opposite to the inundation assumption region (indoor side according to the illustrated example) in the opening / closing body thickness direction. It is located above the contact target portion G. Therefore, even if water collects in the inundation assumption area in the fully closed state of the opening / closing body 10, it is possible to prevent the object detection sensor 40 from inundating, and the water blocking portions 12b and 12c are deteriorated or damaged. As a result, even if some water flows indoors, the object detection sensor 40 can be prevented from being flooded.

Moreover, since the connection portions 40a2, 40b2 of the electrical wirings e1 and e2, the sensor control circuit 41, the opening / closing body control circuit 51, and the like are located above the upper end of the water stop plate 12 in the fully closed position, these electrical wirings are connected. It is possible to prevent the connection portion, the electronic component, etc. from being flooded and causing a short circuit or poor insulation.

Further, since the blanking control is performed by the light-shielding portion 12d protruding in the thickness direction on the lower end side of the opening / closing body 10, it is possible to reduce the trouble caused by the bending of the opening / closing body 10. That is, if the configuration is such that blanking control is not performed, the switchgear 10 that bends due to wind or vibration may be detected by the object detection sensor 40 and the closing operation of the switchgear 10 may stop. According to the opening / closing device 1, since the blanking control is performed by the light-shielding portion 12d, such a problem can be prevented.
Moreover, since the light-shielding portion 12d is made of an elastic material, it is possible to prevent the light-shielding portion 12d from coming into contact with an object and giving a strong impact.

<Modification example>
According to the opening / closing device 1 of the above embodiment, the first unit 40a and the second unit 40b constituting the object detection sensor 40 are mounted directly in the sensor accommodating portion 32, respectively. The first unit 40a and the second unit 40b may be stored in the waterproof case 60 shown in FIG. 6, respectively, and may be mounted in the sensor housing unit 32 in this stored state.
The waterproof case 60 is formed in a hollow box shape that watertightly covers the first unit 40a and the second unit 40b, at least below the upper end of the water stop plate 12 in the fully closed position. A translucent portion 61 that enables the formation of an optical path R is provided on the outer wall portion of the waterproof case 60.

More specifically, as shown in FIG. 6, the waterproof case 60 of the illustrated example is formed in a bottomed tubular shape having an opening 60a at the upper end and a bottom 60b at the lower end, and light is projected onto the peripheral wall portion thereof. A plurality of units 61 are provided according to the pitch of the light emitting unit 40a1 or the light receiving unit 40b1 of the object sensing sensor 40.
Each light projecting unit 61 is formed of a translucent material such as an acrylic resin plate or a glass plate. Other examples include a mode in which a plurality of optical paths R are transmitted by a light projecting portion (not shown) elongated in the vertical direction, and a mode in which the entire waterproof case 60 is formed of a translucent material. It is also possible to do.

The waterproof case 60 of the illustrated example is formed to be longer than the total length of the first unit 40a or the second unit 40b in the vertical direction, and the first unit 40a or the second unit 40b, the sensor control circuit 41, and electricity. The connection portion of the wirings e1 and e2 is inherent.
Therefore, if the waterproof case 60 is used, the waterproof performance of the object detection sensor 40 can be further improved, and the assembleability and maintainability are also good.

As another example of the waterproof case 60, it is also possible to cover only the lower half side of the first unit 40a or the second unit 40b. In this case, at least the stop in the fully closed position. It is preferable to cover the portion corresponding to the lower side of the water plate 12 below the upper end.

Further, according to the switchgear 1 having the above configuration, the multi-optical axis sensor is used for the object detection sensor 40, but the object detection sensor 40 is replaced with the object detection sensor 40'as shown in the opening / closing device 2 shown in FIG. It is also possible to use the above-mentioned mode.
The object detection sensor 40'is a sensor that emits an obstacle detection medium such as a laser beam or infrared rays to non-contactly detect that an obstacle has entered the radiated obstacle detection medium.
The object sensing sensor 40'is electrically wired to the opening / closing body control circuit 51 so as to input a sensing signal to the opening / closing body control circuit 51, and the electrical wiring, the control circuit, and the like are arranged above the water stop plate 12. are doing.
Therefore, according to the switchgear 1, it is possible to prevent the connection portion of the electric wiring, the electronic component, and the like from being flooded and causing a short circuit, poor insulation, and the like. Moreover, it is also possible to detect that water actually collects in the inundation assumption area by the object detection sensor 40'.

Further, the present invention is not limited to the above-described embodiment, and can be appropriately changed without changing the gist of the present invention.

1: Switchgear 10: Switchgear 12: Water stop plate 12a: Water stop plate body 12b, 12c: Water stop part 12d: Shading part 40: Object detection sensor (multi-optical axis sensor)
40a: First unit 40b: Second unit 40a2, 40b2: Connection part 41: Sensor control circuit 50: Control circuit 51: Open / close body control circuit 60: Waterproof case 61: Translucent part e1, e2: Electrical wiring R, R1: Optical path

Claims (5)

In an opening / closing device including an opening / closing body that closes downward so as to partition a space and an object sensing sensor that detects an object in the vicinity of the opening / closing body.
On the lower side of the opening / closing body, the space on one side partitioned when fully closed is regarded as an assumed inundation area, and water is stopped at a predetermined height so as to prevent the water accumulated in the assumed inundation area from flowing into the space on the other side. A board is provided,
The object detection sensor is a switchgear, characterized in that a connection portion of electrical wiring is arranged above the upper end of the water stop plate in a fully closed position. The switchgear according to claim 1, wherein the object sensing sensor is provided in the space on the other side. The object sensing sensor is a multi-optical axis sensor in which a large number of optical paths are formed by a pair of light emitting sections and light receiving sections arranged in the vertical direction, and at least a part of these paths is detected by an object. The opening / closing device according to claim 1 or 2, wherein the opening / closing device is characterized by the above. The object sensing sensor includes a control circuit that outputs a signal according to a sensing state, and the control circuit is arranged above the upper end of the water stop plate in a fully closed position. 3. The opening / closing device according to 3. The object detection sensor is provided in a hollow waterproof case.
The waterproof case is formed in a hollow box shape that watertightly covers the object detection sensor at least below the upper end of the water stop plate in a fully closed position, and enables the formation of the optical path on the outer wall portion thereof. The switchgear according to claim 3 or 4, wherein the switchgear has a translucent portion.

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