JP7219126B2 - switchgear - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening/closing device, such as a shutter device or an overhead door, which 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 the opening and closing body that performs the closing operation so as to partition the space. There is a shutter device for garages designed to prevent water from entering the garage from the outside.
In such a shutter device, objects of different heights, such as people and vehicles, pass through the opening when the opening/closing body is opened. For this reason, it is required to sense an object in a range extending in the vertical direction of the opening.

A shutter device capable of sensing objects having different heights as described above is disclosed in Patent Document 2, for example. This shutter device has a multi-optical axis sensor extending in the vertical direction in the left and right guide rails. This multi-optical axis sensor forms a large number of light paths arranged in the vertical direction by a large number of light projecting parts and light receiving parts arranged in the vertical direction, and when any one of these many light paths is blocked by an object emits a sensing signal to

JP 2016-204843 A JP 2010-77752 A

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

In view of such problems, the present invention comprises the following configurations.
An opening/closing device comprising an opening/closing body that performs a downward closing action so as to partition a space, and a multi-optical axis sensor that forms a large number of optical paths for sensing an object by means of a large number of vertically arranged pairs of light projecting and light receiving sections. In the device, a predetermined height is provided on the lower side of the opening and closing body so that the space on one side partitioned when fully closed is regarded as a flooded area and water accumulated in the flooded area is prevented from flowing into the space on the other side. The multi-optical axis sensor has the pair of light projecting part and light receiving part separated from the water stop plate and arranged in the space on the other side, and the opening and closing body Left and right guide rails for guiding both ends in the width direction in the vertical direction, and a lower frame portion for receiving the opening and closing body when fully closed on the lower side. and a water stop portion that contacts the guide rail and the lower frame portion to ensure watertightness, and the multi-optical axis sensor is positioned away from the water stop portion to the other side in the thickness direction of the opening and closing body. A switchgear characterized by:

Since the present invention is configured as described above, it is possible to reduce sensor failure due to water intrusion.

It is a front view which shows an example of the opening-and-closing apparatus which concerns on this invention. It is a principal part longitudinal cross-sectional view of the opening-and-closing apparatus, (a) shows the state before full closing, (b) shows a fully closed state. It is a principal part cross-sectional view of the same opening-and-closing apparatus. It is a perspective view which shows an example of a light-shielding member. 4 is a flow chart showing an example of an obstacle sensing operation of a sensor control circuit, (a) in a blanking control mode and (b) in a normal sensing mode. FIG. 4 is a structural diagram showing a state in which the object detection sensor is stored in a storage case, with a main part cut away;

The present embodiment discloses the following features.
The first feature is that the opening/closing body moves downward to partition the space, and the multiple pairs of light emitting units and light receiving units arranged in the vertical direction form multiple optical paths for sensing objects. In the switchgear provided with a sensor, a space on one side partitioned when fully closed is regarded as an assumed flooding area, and water accumulated in the assumed flooding area flows into the space on the other side. A water stop plate with a predetermined height is provided to prevent
In the multi-optical axis sensor, the pair of light projecting part and light receiving part are arranged in the space on the other side separated from the water stop plate (see FIGS. 1 to 3).
According to this configuration, it is possible to prevent the multi-optical axis sensor from being submerged even when the assumed submergence area is submerged.

As a second feature, in order to reduce erroneous sensing due to bending of the opening/closing body, the multi-optical axis sensor blocks two or more partial optical paths among the multiple optical paths in order in the closing direction. Each time, the presence or absence of blocking of the optical paths located closer to the opening direction, including these blocked optical paths, is ignored, and a detection signal corresponding to the presence or absence of blocking of the optical paths on the closing direction side of the ignored optical paths is output. The water stop plate is provided with a light shielding part that protrudes to the other side and blocks the part of the optical path (see FIGS. 2 and 5).

A third feature is that the light shielding portion is made of an elastic material in order to absorb the impact caused by contact with an object or the like.

A fourth feature is that, in order to more effectively prevent the multi-optical axis sensor from being submerged in water, a guide rail guides both ends in the width direction of the opening/closing body in the vertical direction, and the opening/closing body is positioned downward when fully closed. Water stop portions are provided on both width direction end sides and a lower end side of the water stop plate to ensure watertightness by coming into contact with the guide rail and the lower frame portion, and the multi-light The axis sensor is located away from the water stop portion on the other side in the thickness direction of the opening/closing body (see FIGS. 2 and 3).

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

FIG. 1 shows an example of an opening/closing device according to the present invention.
The opening/closing device 1 includes an opening/closing body 10 that performs a closing operation so as to partition a space, a storage portion 20 that accommodates and extends the opening/closing body 10 on the opening direction side, and both ends in the width direction of the opening/closing body 10. Two guide rails 30, 30 enclosing each with a concave cross section and guiding them in the vertical direction, a lower frame portion 35 (see FIG. 2) facing the lower end of the opening/closing body 10, and detecting an object in the vicinity of the opening/closing body 10. An object detection sensor 40 (multi-optical axis sensor) and a control circuit 50 are provided.
This switchgear 1 is attached to the opening of the frame of, for example, a garage or a factory. A water stop shutter device is constructed in which the water stop plate 12 prevents the accumulated water from flowing into the space on the other side (the indoor side according to FIG. 3).

The opening/closing body 10 comprises a main body 11 of the opening/closing body by connecting a plurality of slats 11a formed by bending a horizontally elongated substantially rectangular metal plate so as to rotate between vertically adjacent slats 11a, 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 a water stop plate main body 12a, water stop portions 12b and 12c (see FIGS. 2 and 3) that contact the guide rail 30 and the lower frame portion 35 to ensure watertightness, and the other side ( 2) to block a part of a large number of optical paths R by the object detection sensor 40. As shown in FIG.

The water stop plate main body 12a is a member configured in a rectangular flat plate shape without a portion penetrating in the thickness direction, and both end sides in the width direction are fitted to the guide rails 30, 30. As shown in FIG.
The water stop plate main body 12a may be formed by suitably processing one or more metal plates so that there are no gaps or holes in the thickness direction.

The water stop portions 12b and 12c are made of an elongated rubber material.
One of the water stop portions 12b is arranged in an elongated shape continuously in the vertical direction on both end sides in the width direction of the water stop plate body 12a. As shown in FIG. 3, the water stop portion 12b is integrally attached to the water stop plate body 12a via brackets 12e fixed to the width direction end portions of the water stop plate body 12a.
As shown in FIG. 2, the other water stop portion 12c is disposed on the lower end side of the water stop plate 12 in an elongated shape continuous in the width direction of the opening/closing body. The water stop portion 12c is integrally attached to the water stop plate 12 by a bracket (not shown) or the like.

The light shielding part 12d is a member that protrudes from the surface of the waterstop body 12a and blocks the two optical paths R, R that are vertically adjacent to each other. To position.
As shown in FIG. 4, the light shielding portion 12d has a trapezoidal vertical cross-section with inclined surfaces at the top and bottom, and is formed with a predetermined width.
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 or elastomer resin), but as another example, it is made of a hard synthetic resin material. A mode or a mode made of a metal material is also possible.
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 attachment using appropriate fastening tools (eg, screws, bolts, rivets, brackets, etc.).

The storage unit 20 includes a storage case 21 having an opening at the bottom for retracting the opening/closing body 10, and a winding shaft 22 for winding and feeding the opening/closing body 10, and the winding shaft 22. It has an opening/closing machine 23 that is driven to rotate and brakes via a power transmission mechanism such as a chain and a sprocket, and an opening/closing body control circuit 51 that is part of the control circuit 50 (see FIG. 1).

The opening/closing machine 23 is composed of a rotary electric motor, a braking mechanism, and the like.
The opening/closing device 23 is provided with a full-close/full-open sensor 23a that outputs a contact signal at the fully closed position and the fully open position of the switch 10. As shown in FIG. The full-close full-open sensor 23a is a mechanical counter structure switch 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 equipped with a microcomputer or the like. signal, other signals, etc., and controls the opening/closing machine 23 according to the processing result.

Further, the guide rail 30 is configured to surround the width direction end portion of the opening/closing body 10 in a concave shape on one side and the opposite side in the width direction of the opening/closing body so as to guide the opening/closing body 10 in the vertical direction.
At the lower end of the guide rail 30, there is a water stop guide portion 31 that fits in a concave shape with respect to the width direction end of the water stop plate 12 and guides the water stop plate 12 in the vertical direction while maintaining watertightness. be provided. A sensor housing portion 32 housing an object sensor 40 is provided on the indoor side of the guide rail 30 (see FIG. 3).
The guide rail 30 is fixed to the wall surface (not shown) of the frame to which the opening/closing device 1 is mounted via a bracket (not shown) or the like.

The water stop plate guide portion 31 is formed to have a concave cross-sectional shape surrounding the widthwise end portion of the water stop plate 12 (see FIG. 3), and extends vertically. On the lower end side of this water stop plate guide portion 31, the inner surface facing the surface of the water stop plate 12 on the side of the assumed flooding area is slidably contacted with the lower end side of the water stop plate 12 to hold the water stop plate 12 by the inclined surface. A guide portion 31a for guiding downward is provided.

The sensor housing portion 32 is an elongated member that continues along the indoor side surface of the guide rail 30 in the opening/closing direction of the opening/closing member, and is fixed to the guide rail 30 with fasteners such as screws and rivets.
The sensor housing portion 32 is composed of a housing case portion 32a having a concave cross section and an opening facing the indoor side, and a detachably mounted cover portion 32b covering the opening.

The housing case portion 32a has a plurality of through holes 32a1 arranged at intervals in the vertical direction on the side wall on the center direction side of the opening/closing body in the width direction of the opening/closing body. Each through-hole 32a1 is a hole for passing a light beam from an object sensor 40, which will be described later (see FIG. 3).

The cover portion 32b has one end in the width direction of the opening/closing body detachably fitted to the housing case portion 32a, and the other end thereof is fixed to the housing case portion 32a by a detachable fastener such as a screw or bolt. (See Figure 3).

In addition, the lower frame portion 35 is continuous between the left and right guide rails 30, 30 on the lower end side of the opening that is opened and closed by the opening/closing body 10, and faces the lower end surface of the opening/closing body 10 when fully closed. be provided.
The lower frame portion 35 is provided with a protruding piece portion 35 a that protrudes upward on the indoor side of the opening/closing body 10 . The projecting piece 35a is continuous along the opening/closing body 10 in the width direction of the opening/closing body. The protruding piece 35a is in watertight contact with the water stop portion 12c on the lower end side of the opening/closing body 10 when fully closed (see FIG. 2(b)).

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 widthwise end side (see FIG. 3), and the water stop portion 12c is pressed against the lower frame portion 35 on the lower end side. (see FIG. 2), and the gaps on both sides and the lower end side of the water stop plate 12 are substantially closed. Therefore, even if rainwater or the like accumulates on the expected flooding area side (outdoor side according to the illustrated example), this water is prevented from entering the indoor side.

The object detection sensor 40 is provided with a large number of pairs of light projecting portions 40a1 and light receiving portions 40b1 (photoelectric sensors) arranged in the vertical direction close to the water stop plate 12 from the indoor side. are placed apart from each other.
The object detection sensor 40 forms a plurality of optical paths R by the light projecting portion 40a1 and the light receiving portion 40b1, and senses when an object blocks at least part of the plurality of optical paths.

Specifically, the object detection sensor 40 includes a first unit 40a extending vertically within the guide rail 30 on one side and a second unit 40a extending vertically within the guide rail 30 on the opposite side. It is provided with two units 40b, and forms a large number of optical paths R arranged in the opening/closing path of the opening/closing body 10 at intervals in the vertical direction.
A signal output from the object detection sensor 40 is treated as a closing motion limiting signal for limiting the closing motion of the opening/closing body 10 .

The first unit 40a and the second unit 40b are positioned at a predetermined distance H in the opening direction from a seating target portion G (for example, a lower frame, a floor surface, the ground, etc.) of the opening/closing body 10 when fully closed. and fixed in the sensor housing portion 32 .
The predetermined dimension H is set within the range of 150-1500 mm, preferably within the range of 150-500 mm.

The first unit 40a has a cubic shape elongated in the vertical direction, and has a large number of light projection units 40a1 spaced substantially at regular intervals in the longitudinal direction. These light projecting parts 40a1 are supplied with electric power from the electric wiring e1 in the sensor accommodating part 32, and emit light (for example, infrared rays) as an obstacle sensing medium.
A 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 has a cubic shape elongated in the vertical direction, and has a large number of light receiving sections 40b1 spaced substantially at regular intervals in the longitudinal direction, and outputs a signal according to the sensing state of these light receiving sections 40b1. A sensor control circuit 41 is provided, and an output signal of the sensor control circuit 41 is led to a control circuit 50 in the storage section 20 through an electric wire e2.
The connection portion 40b2 between the electrical 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.

Furthermore, the power supply circuit, amplifier, and other electronic circuits (not shown) that supply power to the first unit 40a and/or the second unit 40b are also connected from the upper end of the water stop plate 12 at the fully closed position. are also placed on top.

The control circuit 50 is composed of the opening/closing body control circuit 51 and the sensor control circuit 41 described above, and controls the operation of the opening/closing device 1 through cooperation between these two control circuits 51 and 41 .
Incidentally, if the control circuit 50 is arranged above the water stop plate 12 at the fully closed position, it is possible to configure one or three or more (not shown).
When a plurality of control circuits 50 are provided, it is possible to arbitrarily set functions such as a blanking mode, a normal sensing mode, and other controls, which will be described later.
Also, when the control circuit 50 is singular, this single control circuit (for example, the opening/closing body control circuit 51) performs all controls such as a blanking mode and a normal sensing mode, which will be described later.

Next, 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 one of the blanking control mode and the normal sensing mode according to predetermined conditions.

<Blanking control mode>
The blanking control mode is a mode that is executed when the light blocking portion 12d passes through a number of optical paths R of the object sensor 40 during the closing operation of the opening/closing member 10. FIG.
In this blanking control mode, the sensor control circuit 41 includes the blocked optical paths each time two or more of the multiple optical paths are blocked by the light blocking section 12d in order in the closing direction. The presence or absence of blocking of the optical path positioned closer to the opening direction is ignored, and depending on the presence or absence of blocking of the optical path on the closing direction side of the ignored optical path, the output of the closing operation limit signal, which will be described later, is turned ON or OFF. .
Here, according to the example shown in FIG. 1, the above-mentioned "optical path including the blocked optical path and positioned closer to the opening direction" means the lower side of the two optical paths blocked in order in the closing direction by the light blocking portion 12d, according to the example shown in FIG. are all optical paths equal to or greater than 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, excluding the optical path R1, are included in the "optical path located near the opening direction including the blocked optical path". It is also possible to

The closing operation restriction signal is a signal for restricting the closing operation of the opening/closing member 10, and may be, for example, a contact signal that changes between an OFF state and an ON state, or a voltage signal.

Specifically, the obstacle sensing operation in the blanking control mode will be described. As shown in FIG. of the optical paths R are blocked (step S1), and if it is blocked, the output of the closing operation limit signal is turned ON (step S2); if it is not blocked, the closing operation limit signal is turned off (step S3). After that, the process returns to step S1.
In one example of the present embodiment, the two lowermost optical paths R among the plurality of optical paths R are exclusively used for sensing that the light shielding portion 12d has reached the lower end side of the object sensor 40, As another example, these two optical paths R can also be used for obstacle sensing, although they are not intended to be sensed.

<Regarding normal sensing mode>
A 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, or the like.
In this normal sensing mode, the sensor control circuit 41 turns ON or OFF the output of the closing operation limit signal depending on whether or not at least some of the multiple normal sensing optical paths R are blocked, regardless of the order of the closing directions. to
Here, the "normal sensing optical path R" is a plurality of optical paths R positioned between the two upper and lower optical paths R, R closest to the opening direction and the two upper and lower optical paths R, R closest to the closing direction. be. The two upper and lower optical paths R, R closest to the opening direction and the two upper and lower optical paths R, R closest to the closing direction are used to detect that the light blocking portion 12d has entered the sensing area of the object sensor 40. Used.

As shown in the flowchart of FIG. 5(b), in the normal sensing mode, the sensor control circuit 41 determines whether or not at least a portion of the plurality of normal sensing optical paths R is blocked, and determines whether or not it is blocked. If so, the process proceeds to step S22 to turn on the output of the closing operation restriction signal, and if not, the process proceeds to step S23 to turn off the output of the closing operation restriction signal. After that, the process returns to step S21.

When the sensor control circuit 41 inputs the closing operation restriction signal, the opening/closing member control circuit 51 stops the closing operation of the opening/closing member 10 by controlling the opening/closing device 23 or receives a closing signal from a closing switch or the like. The closing operation of the opening/closing member 10 is restricted, such as by prohibiting the closing operation of the opening/closing member 10 even when the opening/closing member 10 is closed.
It should be noted that the opening/closing body 10 can be stopped by operating a stop switch (not shown) at any point in the steps described above.

Next, the characteristic functions and effects of the opening/closing device 1 configured as described above will be described in detail.
According to the opening/closing device 1 configured as described above, the object detection sensor 40 is placed in the space on the opposite side (the indoor side according to the illustrated example) of the assumed flooding area in the thickness direction of the opening/closing body, away from the water stop portions 12b and 12c. It is positioned above the abutment target site G. Therefore, even if water accumulates in the expected flooding area with the opening/closing body 10 fully closed, it is possible to prevent the object sensor 40 from being flooded, and to prevent deterioration or breakage of the water stop portions 12b and 12c. Even if a small amount of water flows indoors as a result, it is possible to prevent the object sensor 40 from being submerged.

Moreover, since the connection portions 40a2 and 40b2 of the electric wires e1 and e2, the sensor control circuit 41, the opening/closing body control circuit 51, and the like are positioned above the upper end of the water stop plate 12 in the fully closed position, these electric wires It is possible to prevent short circuits, insulation failures, etc., caused by water inundation of connecting parts, electronic parts, and the like.

Further, blanking control is performed by the light shielding portion 12d projecting in the thickness direction on the lower end side of the opening/closing body 10, so that problems due to bending of the opening/closing body 10 can be reduced. That is, if the blanking control is not performed, there is a possibility that the opening/closing body 10 flexing due to wind or vibration may be sensed by the object detection sensor 40 and the closing operation of the opening/closing body 10 may be stopped. According to the opening/closing device 1 described above, blanking control is performed by the light shielding portion 12d, so that 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>
According to the opening/closing device 1 of the above-described embodiment, the first unit 40a and the second unit 40b constituting the object sensor 40 are directly mounted in the sensor housing portion 32, respectively. Alternatively, the first unit 40a and the second unit 40b may be housed in the waterproof case 60 shown in FIG.
The waterproof case 60 is formed in the shape of a hollow box 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. An outer wall portion of the waterproof case 60 is provided with a translucent portion 61 that enables formation of the optical path R. As shown in FIG.

Specifically, as shown in FIG. 6, the illustrated waterproof case 60 is formed in a bottomed cylindrical shape having an opening 60a at the upper end and a bottom 60b at the lower end. A plurality of portions 61 are provided according to the pitch of the light projecting portion 40a1 or the light receiving portion 40b1 of the object detection sensor 40. FIG.
Each light projecting section 61 is made of a translucent material such as an acrylic resin plate or a glass plate, for example. As other examples, there is a mode in which a plurality of light paths R are transmitted by a light projecting part (not shown) elongated in the vertical direction, and a mode in which the entire waterproof case 60 is made of a translucent material. It is also possible to

The waterproof case 60 in the illustrated example is formed longer than the total length in the vertical direction of the first unit 40a or the second unit 40b, and includes the first unit 40a or the second unit 40b, the sensor control circuit 41, the electrical Connection portions of the wirings e1 and e2 are included.
Therefore, if this waterproof case 60 is used, the waterproof performance of the object sensor 40 can be further improved, and assembling and maintenance are also good.

As another example of the waterproof case 60, it is possible to adopt a mode that covers only the lower half side of the first unit 40a or the second unit 40b. It is preferable to cover the part corresponding to the lower side than the upper end of the water plate 12 .

Moreover, the present invention is not limited to the embodiments described above, and can be modified as appropriate without changing the gist of the present invention.

1: Opening and closing device 10: Opening and closing body 12: Water stop plate 12a: Water stop plate main body 12b, 12c: Water stop part 12d: Light shielding part 40: Object sensor (multi-optical axis sensor)
40a: first unit 40b: second unit 40a2, 40b2: connection part 41: sensor control circuit 50: control circuit 51: opening/closing body control circuit 60: waterproof case 61: translucent part e1, e2: electrical wiring R, R1: optical path

Claims (7)

An opening/closing device comprising an opening/closing body that performs a downward closing action so as to partition a space, and a multi-optical axis sensor that forms a large number of optical paths for sensing an object by means of a large number of vertically arranged pairs of light projecting and light receiving sections. in the device,
On the lower side of the opening/closing body, a water stop of a predetermined height is installed so as to treat one side of the space partitioned when fully closed as an expected flooding area and prevent water accumulated in the expected flooding area from flowing into the space on the other side. A plate is provided,
The multi-optical axis sensor has the pair of light projecting part and light receiving part arranged in the space on the other side separated from the water stop plate ,
left and right guide rails for guiding both ends in the width direction of the opening/closing body in the vertical direction;
Water stop portions that contact the guide rail and the lower frame portion to ensure watertightness are provided on both widthwise end sides and the lower end side of the water stop plate,
The opening/closing device , wherein the multi-optical axis sensor is positioned away from the water stop portion to the other side in the thickness direction of the opening/closing body . Each time two or more of the multiple optical paths are blocked in order in the closing direction, the multi-optical axis sensor blocks the optical paths positioned closer to the opening direction, including the blocked optical paths. has a blanking control mode that ignores the presence or absence of the ignored light path and outputs a sensing signal according to the presence or absence of blocking of the optical path on the closing direction side of the ignored light path,
2. The switchgear according to claim 1, wherein the water stop plate is provided with a light shielding portion that protrudes toward the other side and blocks the part of the optical path. 3. The opening/closing device according to claim 2, wherein said light shielding portion is made of an elastic material. The lower frame portion is continuous between the left and right guide rails, and the lower frame portion is provided with a protruding piece portion that protrudes upward on the indoor side of the opening/closing body, and the protruding portion is: 4. The opening/closing device according to claim 1, wherein the opening/closing device is in watertight contact with the water stop portion on the lower end side of the opening/closing body when fully closed. The multi-optical axis sensor includes a first unit that extends vertically within the guide rail on one of the left and right sides, and a second unit that extends vertically within the guide rail on the opposite side of the left and right sides. prepared,
Each of the first unit and the second unit is positioned at a predetermined distance in the opening direction from a seating target portion of the opening/closing body when fully closed, and is located at the lower end side of the opening/closing body when fully closed. The switchgear according to any one of claims 1 to 4, characterized in that it is located on the opening direction side of the water stop portion. said first unit comprises a plurality of said light projecting parts spaced at substantially regular intervals in its longitudinal direction, said light projecting parts being powered by electrical wiring;
The second unit comprises a large number of light receiving sections spaced substantially at regular intervals in the longitudinal direction, and a sensor control circuit for outputting a signal according to the sensing state of these light receiving sections, and the output of the sensor control circuit 6. The switchgear according to claim 5, wherein the signal is led to an opening/closing body control circuit for controlling the operation of said opening/closing body through electric wiring. The first unit and the second unit are each housed in a waterproof case,
a waterproof case housing the first unit internally houses the first unit and a connecting portion between the first unit and the electrical wiring;
A waterproof case for housing the second unit is characterized in that the second unit, the sensor control circuit, and a connecting portion between the second unit and the electrical wiring are contained therein. Item 6. The switchgear according to item 6.

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