JP2019173450A - Opening/closing device - Google Patents

Abstract

To perform obstacle detection control in a precise manner.SOLUTION: An opening/closing device includes: an opening/closing body 10 for performing a closing operation so as to partition a space; a fully closed state detecting section A1 for sensing that the opening/closing body 10 under the closing operation has reached a fully closed position B1; a fully opened state detecting section A2 for detecting that the opening/closing body 10 under an opening operation from the fully closed position has reached a fully opened position B2 closer to the opening direction side than the fully closed position B1; and a control circuit 50. The control circuit 50 is configured to inhibit the closing operation of the opening/closing body 10 after the opening/closing body 10 under the closing operation is sensed by the fully closed state detecting section A1, and to release a closing operation prohibition state when the opening/closing body 10 under the opening operation is sensed by the fully opened state detecting section A2.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an opening / closing device that closes an opening / closing body so as to partition a space, such as a shutter device, an overhead door, a roll blind device, a sliding door device, and a sliding gate.

Conventionally, in this type of invention, as described in, for example, Patent Document 1, a multi-optical axis sensor in which a large number of photoelectric sensors are arranged in the vertical direction to form a large number of light beam paths, There is a shutter device that is mounted on a rail and senses an obstacle in a wide range in the vertical direction.
In such a control of the shutter device, each time the opening / closing body that is closed closes the light path of the two photoelectric sensors so that the opening / closing body does not block many light paths and is not regarded as an obstacle detection, The photoelectric sensors higher than the most recent photoelectric sensor under these two photoelectric sensors are made incapable of detecting obstacles. Therefore, the obstacle is sensed only by the photoelectric sensor below the latest photoelectric sensor.
After that, when the opening / closing body is opened, each time the opening / closing body that opens opens the light path, the obstacle insensitive state is canceled in order from bottom to top.

JP 2010-77752 A

However, according to the above-described prior art, if foreign matter such as dust adheres to the photoelectric sensor in an obstacle undetectable state during the closing operation of the opening / closing body, the foreign matter adheres when the opening / closing body is opened. A photoelectric sensor higher than the detected photoelectric sensor does not return to the obstacle sensing state.
For this reason, for example, when an obstacle enters the space above the foreign object when the opening / closing body opens upward from the foreign object, the obstacle cannot be detected and the open / close body is closed. There is a possibility of contact with obstacles. Further, there is a possibility that the closing operation is performed below the foreign matter, but it is assumed that an obstacle comes into contact with the opening / closing body that has started the closing operation to a relatively low position.
Therefore, it is required to perform better obstacle detection control.

In view of such problems, the present invention has the following configuration.
An opening / closing body that performs a closing operation so as to partition a space, a fully-closed sensing unit that senses that the opening / closing body being closed has reached a fully-closed position, and the opening / closing body that is opening from the fully-closed position Is provided with a fully open sensing unit that senses that the fully closed position on the opening direction side of the fully closed position is reached, and a control circuit. After the sensing by the slip sensing unit, the closing operation of the opening / closing body is prohibited, and the closing operation prohibition state is canceled when the opening / closing body being opened is sensed by the full opening sensing unit. Opening and closing device.

  Since the present invention is configured as described above, good obstacle detection control can be performed.

It is a front view which shows an example of the switchgear concerning this invention. It is a cross-sectional view which follows the (II)-(II) line | wire of FIG. FIG. 3 is a cross-sectional view of main parts taken along line (III)-(III) in FIG. 2. The lower end part in the width direction edge part side of an opening-closing body is shown, (a) is a front view, (b) is a right view. Specific examples of the light shielding member are shown. (I) is the uppermost light shielding member, (II) is the light shielding member at the center in the vertical direction, and (III) is the lowermost light shielding member. It is a flowchart explaining operation | movement of the sensor control circuit in closing operation. It is a flowchart explaining operation | movement of the sensor control circuit in open operation. It is a flowchart which shows operation | movement of an opening-closing body control circuit. It is a time chart which shows the relationship between the opening / closing operation | movement of an opening-closing body, and a closing operation prohibition signal. It is a top view which shows the other example of a light passage hole to (a) and (b), respectively.

In the present embodiment, the following features are disclosed.
The first feature is that the opening / closing body that closes to divide the space, the fully-closed sensing unit that senses that the opening / closing body during the closing operation has reached the fully-closed position, and the open / closed body that opens from the fully-closed position. A fully open sensing unit that senses that the open / closed body in operation has reached a fully open position closer to the open direction than the fully closed position; and a control circuit, wherein the control circuit is configured to perform the closing operation. When the opening / closing body is detected by the fully-closed sensing unit, the closing operation of the opening / closing body is prohibited, and the opening / closing body being opened is detected by the fully-opening sensing unit. (See FIG. 9).

  As a second feature, when the opening / closing body in a closing operation is detected by the full closing detection unit, the control circuit disables the closing operation after a predetermined time has elapsed from the detection (FIG. 6). And FIG. 9).

  As a third feature, the predetermined time is set to be longer than the time from when the opening / closing body in the closing operation is sensed by the full-close detection unit until it is substantially fully closed.

  As a fourth feature, a multi-optical axis sensor is provided that forms a large number of light paths by a large number of photoelectric sensors arranged in the opening / closing direction of the opening / closing body, and senses a blocking state of the light paths. Among these photoelectric sensors, a photoelectric sensor located on the closing direction side functions as the full closing detection unit, and another photoelectric sensor located on the opening direction side relative to the full closing detection unit is used for the full opening detection. Function as a unit (see FIG. 9).

A fifth feature is that multiple light paths are formed by a large number of photoelectric sensors arranged in the opening / closing direction of the opening / closing body, and the output of the closing operation prohibition signal is turned on or off according to the blocking state of the light paths. An opening / closing device comprising an axis sensor, prohibiting the closing operation of the opening / closing body when the closing operation prohibiting signal is ON, and releasing the closing operation prohibiting state when the closing operation prohibiting signal is OFF, The multi-optical axis sensor causes two photoelectric sensors located on the closing direction side of the multiple photoelectric sensors to function as the fully closed sensing unit, and is located closer to the opening direction than the fully closed sensing unit. The other two photoelectric sensors function as the full-opening sensing unit, and the multi-optical axis sensor detects the two optical paths when the two light beam paths are blocked in order from the opening direction side to the closing direction side. One ray path closed Regardless of whether or not the light path is interrupted for all photoelectric sensors located closer to the direction side and all photoelectric sensors located closer to the opening direction than the photoelectric sensor, the close operation detection unit is turned off. When the light beam path is blocked, the closing operation prohibition signal is changed from OFF to ON after the blocking time,
Further, in the multi-optical axis sensor, when the light paths of the multiple photoelectric sensors return from the shut-off state in order from the closed direction side to the open direction side, and only the light path of the full-opening sensing unit is turned off First, after the shut-off time, the closing operation prohibition signal is turned from ON to OFF (see FIG. 9).

  As a sixth feature, the closing operation prohibition state is released after the detection by the full opening detection unit and when there is no detection by the photoelectric sensors other than the full opening detection unit.

  As a seventh feature, the multi-optical axis sensor is provided at a position that is a predetermined distance away from the contact target portion of the opening / closing body when fully closed (see FIG. 1).

  As an eighth feature, the multiple light beam paths coincide or substantially coincide with the center of the opening / closing body in the opening / closing body thickness direction (see FIG. 2).

  As a ninth feature, a guide rail that surrounds the widthwise end of the opening / closing body and guides it in the opening / closing direction is provided, and the guide rail is provided with a light passage hole through which the plurality of light beam paths pass. The dimension of the passage hole in the opening / closing body thickness direction is set smaller than the thickness dimension of the opening / closing body (see FIGS. 2 and 3).

  As a tenth feature, a guide rail is provided that surrounds the widthwise end of the opening / closing body and guides in the opening / closing direction, and the guide rail is provided on one side opposite to the width direction of the opening / closing body, and the multi-optical axis sensor Comprises a first unit extending in the opening / closing body opening / closing direction in the one side guide rail, and a second unit extending in the opening / closing body opening / closing direction in the opposite side guide rail, The plurality of light beam paths are formed between two units, and the control circuit includes an opening / closing body control circuit for controlling an opening / closing operation of the opening / closing body. A storage portion for storing the opening / closing body is provided, and in the storage portion, the opening / closing body control circuit is provided closer to one side in the opening / closing body width direction, and the first unit and the second unit, One unit is an obstacle A signal at the time of non-contact sensing is configured to be transmitted to the opening / closing body control circuit through an electric wiring, and at least a part of the electric wiring is disposed in the guide rail located closer to the one side ( (See FIG. 1).

<Specific Embodiment>
Next, specific embodiments 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. The “opening / closing body width direction” means a direction that is substantially orthogonal to the opening / closing direction of the opening / closing body and is not the thickness direction of the opening / closing body. The “opening / closing body opening / closing direction” means a direction in which the opening / closing body slides to partition or open the space.

  The opening / closing device 1 includes an opening / closing body 10 that closes and closes a space, a storage portion 20 that stores and feeds the opening / closing body 10 on the opening direction side, and both lateral ends of the opening / closing body 10. Two guide rails 30 and 30 that are surrounded by a concave cross section and guide in the opening and closing direction, a multi-optical axis sensor 40 that non-contact senses an obstacle below the opening and closing body 10, and a control circuit 50, for example, It is mounted on a housing having a relatively wide opening such as a garage or a factory.

At the end of the opening / closing body 10 in the lateral width direction, a slip-out preventing member 14 that prevents pull-out from the guide rail 30 is provided (see FIGS. 2 and 4).
The slip-off prevention member 14 integrally protrudes from the end of the opening / closing body 10 in the lateral width direction and has a portion extending in the opening / closing body width direction on the protruding end side.

The lowermost slat 11a, the movable seat plate 13, and the fixed seat plate 12 are provided with closing members 15, 16, and 17, respectively (see FIGS. 4 and 5).
These blocking members 15, 16, and 17 are respectively attached to the end portions of the slat 11 a, the movable seat plate 13, and the fixed seat plate 12 so as to block the space that communicates in the lateral width direction inside the lower end of the opening / closing body. ing.

  Specifically, as shown in FIG. 5I, the closing member 15 is fixed to the back surface of the slat 11a and is bent with respect to the fixing piece portion 15a. This is an integral member having a closing piece 15b that closes the opening at the widthwise end of the slat 11a. The closing member 15 is fixedly fastened to the slat 11a closest to the upper side of the fixed seat plate 12.

  The closing member 16 is formed in a substantially block shape having a closing piece portion 16a for closing the opening at the end in the width direction of the fixed seat plate 12 and a fastening portion 16b fastened to the fixed seat plate 12. According to this, a plurality of members are combined.

  The closing member 17 is inserted into the movable seat plate 13 to block the light beam path R that attempts to pass through the movable seat plate 13, and a fastening piece portion that is fastened to the movable seat plate 13. 17b is an integral member.

During the normal closing operation of the opening / closing body 10, these blocking members 15, 16, 17 sequentially block the multiple light beam paths R of the multi-optical axis sensor 40 two by two so that the opening / closing body 10 is not detected as an obstacle. (This may be referred to as blanking control.)
Therefore, if these blocking members 15, 16, and 17 function in the same manner, it is possible to adopt modes other than the illustrated example, such as single, two, four or more.

  When the opening / closing body 10 shown in the figure is replaced with a solid opening / closing body, the closing members 15, 16, and 17 can be omitted.

In a preferred example of the present embodiment, the centers of the many light beam paths R and the center of the opening / closing body 10 are made to coincide or substantially coincide with each other in the opening / closing body thickness direction.
According to this configuration, the light projecting surface 40a1 (or the light receiving surface) of the multi-optical axis sensor 40 can be covered and protected by the end surface in the width direction of the opening / closing body 10, and consequently the light projecting surface 40a1 (or the light receiving surface). ) Can be prevented from adhering to or from being damaged.

  Further, as shown in FIG. 1, the storage unit 20 includes a winding shaft 22 that winds and unwinds the opening / closing body 10 in a storage case 21 in which an opening for allowing the opening / closing body 10 to protrude is formed in the lower part. , An opening / closing machine 23 for driving and rotating and braking the winding shaft 22 via a power transmission mechanism such as a chain and a sprocket, and an opening / closing body control circuit 51 which is a part of the control circuit 50.

  The storage case 21 is formed into a hollow rectangular parallelepiped shape by the side covers 21a at both ends, the case main body 21b connected to the side covers 21a and extending in the opening / closing body width direction, and the like.

The opening / closing machine 23 includes a rotary electric motor and a braking mechanism.
The opening / closing machine 23 is provided with a fully-closed fully-opening sensing unit 23 a that outputs contact signals at the fully-closed position and the fully-opened position of the opening / closing body 10. The full-closed full-open sensing unit 23a is a mechanical counter structure switch that outputs a contact signal when the rotation amount of the rotary part 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 functions as a program stored in advance to process an input signal from the multi-optical axis sensor 40 as described later. The switch 23 is controlled accordingly.
The opening / closing body control circuit 51 and the opening / closing machine 23 are disposed in the storage case 21 on one side in the opening / closing body width direction (leftward in the illustrated example).

Moreover, the guide rail 30 is comprised so that the width direction edge part of the opening / closing body 10 may be enclosed in a concave shape on the opposite side to the one side of the opening / closing body width direction.
As shown in FIG. 2, the guide rail 30 includes a hollow fixed column 31 fixed to a stationary part on the housing side in the opening / closing direction of the opening / closing member, and a guide detachably connected to the fixed column 31. A rail body 32 and an inner guide rail 33 that engages the slip prevention member 14 so as not to be pulled out in the guide rail body 32 are provided, and a multi-optical axis sensor is mounted by a bracket 48 in a fixed column 31 on the back side of the guide rail body 32. 40 is fastened.

  The inner guide rail 33 and the fixed column 31 are provided with a light passage hole 33 b 1 at a position facing the end of the removal preventing member 14 so as to penetrate from the bottom of the inner guide rail 33 into the fixed column 31.

  The light passage hole 33b1 is a through hole for passing through the light path R of the multi-optical axis sensor 40, and faces the light projecting surface 40a1 (or the light receiving surface) of each photoelectric sensor constituting the multi-optical axis sensor 40. .

The multi-optical axis sensor 40 includes a first unit 40a that extends in the vertical direction in the guide rail 30 on one side and a second unit 40b that extends in the vertical direction in the guide rail 30 on the opposite side. Prepare.
The first unit 40a and the second unit 40b are separated from the contact 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 in the opening direction. And fixed to the back side of the inner guide rail 33 and the guide rail body 32 (in the fixed support 31).
The predetermined dimension H is set within a range of 150 to 1500 mm, and more preferably within a range of 150 to 500 mm.
As another example other than the illustrated example, the first unit 40 a and the second unit 40 b can be provided over the entire height of the opening that is opened and closed by the opening / closing body 10.
These two units 40a and 40b form a number of light beam paths R that are substantially spaced apart in the vertical direction (see FIG. 1).

  The first unit 40a has a large number of projectors (not shown) at a substantially constant interval in the longitudinal direction in a cubic case elongated in the opening / closing body opening / closing direction. These projectors constitute a photoelectric sensor, and receive light supplied from the electric wiring 49 in the fixed column 31 to emit light (for example, infrared rays) as an obstacle sensing medium.

The second unit 40b includes a large number of light receivers (not shown) spaced substantially constant in the longitudinal direction in a cubic case elongated in the opening / closing body opening / closing direction, and sensing signals of these light receivers. The sensor control circuit 41 which processes this is provided.
Each light receiver of the second unit 40b and each light projector of the opposing first unit 40a constitute a photoelectric sensor that forms a light path R therebetween.
The sensor control circuit 41 processes the sensing signal from the light receiver, and turns on the output of the closing operation inhibition signal as a result of the processing, or turns off the output of the closing operation inhibition signal.

Here, the closing operation prohibition signal is a signal for prohibiting the closing operation of the opening / closing body 10. The closing operation prohibition signal may be, for example, a contact signal that changes between the OFF state and the ON state, or a voltage signal.
When this closing operation prohibition signal is ON, the opening / closing body control circuit 51 does not close the opening / closing body 10 even when there is a closing command from a closing switch or the like. When the closing operation prohibition signal is turned ON during the closing operation of the opening / closing body 10, the opening / closing body control circuit 51 stops the closing operation of the opening / closing body 10.

The electrical wiring 49 on the first unit 40 a side and the electrical wiring 49 on the second unit 40 b side are respectively guided upward through the space in the guide rail 30, and the opening / closing body control circuit in the storage case 21. 51 is electrically connected.
In particular, the second unit 40 b (one unit) having a light receiver transmits a signal when an obstacle is detected in a non-contact manner by blocking the light path R to the opening / closing body control circuit 51 through the electric wiring 49. Configured. And this 2nd unit 40b is arrange | positioned in the guide rail 30 located in the said one side (illustrated left side).
According to this configuration, the signal output from the second unit 40b can be satisfactorily transmitted to the opening / closing body control circuit 51.
In other words, contrary to the illustration, the first unit 40a is set as the light receiver side, and the signal output from the first unit 40a is passed through the other (right side in the figure) guide rail 30 to the opening / closing body control circuit 51. In the case of transmission, the electrical wiring 49 becomes relatively long, so that the sensing accuracy may be reduced due to an increase in electrical resistance or the like, but this embodiment causes such a problem. hard.

If the relationship between the many light beam paths R and the guide rail 30 is described in detail, a plurality of light passage holes 33b1 on the bottom side of the guide rail 30 are provided at intervals in the vertical direction as shown in FIG.
Each light passage hole 33b1 is formed in a long hole shape extending in the vertical direction so as to pass a plurality of (four in the illustrated example) light ray paths R which are a part of the many light ray paths R.
According to the elongated light passage hole 33b1, clogging of foreign matters such as dust can be reduced as compared with the case where the light passage hole is a circular hole.
In addition, since a plurality of light beam paths R are associated with one long hole-shaped light passage hole 33b1, it is easy to align the optical axis in the vertical direction and is excellent in productivity.
That is, if one light path R is associated with one light passage hole 33b1, it is necessary to align the optical axis with the light passage hole 33b1 for a large number of photoelectric sensors. Although this may occur, according to the present embodiment, such problems can be reduced and productivity can be improved.

The light passage hole 33b1 on the first unit 40a side has a width W slightly larger than the diameter of the light projecting surface 40a1 of the light projector of the multi-optical axis sensor 40.
That is, the projector emits light in a radial shape that spreads at a predetermined angle. The light passage hole 33b1 is set to have a width W so as to appropriately maintain the radial spread.
A light passage hole (not shown) on the second unit 40b side is also formed in substantially the same manner as the light passage hole 33b1.
Therefore, the light receiver facing the light projector receives the light emitted from the light projector even when the position is slightly shifted in the opening / closing body thickness direction (width W direction in the drawing) due to a manufacturing error or the like. It will be.

The width W of the light passage hole 33b1 is set to be smaller than the thickness dimension X (see FIG. 2) at the end surface in the width direction of the opening / closing body 10. In addition, according to an example of the present embodiment, the dimension X is a dimension in the thickness direction of the closing members 15, 16, and 17.
According to this configuration, the two light beam paths R can be satisfactorily blocked by the widthwise end portions of the opening / closing body 10 during blanking control.
Moreover, since the hole width is relatively small, it is possible to effectively prevent foreign matters such as dust from adhering to the light passage hole 33b1.
Further, the end side of the opening / closing body 10 is prevented from interfering with the inner edge of the light passage hole 33b1, and the sliding / contacting of the opening / closing body 10 and the light projecting surface 40a1 (light receiving surface) of the multi-optical axis sensor 40 are prevented. Damage and the like can be prevented.

  According to the above embodiment, the light passage hole 33b1 is provided so as to penetrate the inner guide rail 33 and the bottom wall of the guide rail body 32. In a configuration in which the guide rail 33 is omitted, an aspect in which a light passage hole is provided only in the bottom wall of the guide rail body 32, an aspect in which a separate plate having a light passage hole is provided on the bottom side of the guide rail body 32, and the like It is also possible to do.

Of the many photoelectric sensors constituting the multi-optical axis sensor 40, the two photoelectric sensors adjacent to the top and bottom closest to the closing direction indicate that the opening / closing body 10 during the closing operation has reached a predetermined fully closed position B1. It functions as a fully-closed sensing unit A1 for sensing.
In the fully closed position B1, the closing members 15, 16, and 17 of the opening / closing body 10 during the closing operation cover the fully closed detection unit A1.

Of the many photoelectric sensors constituting the multi-optical axis sensor 40, the two photoelectric sensors closest to the top and bottom in the opening direction are such that the opening / closing body 10 during the opening operation is closer to the opening direction than the fully closed position B1. It functions as a fully open sensing unit A2 that senses that it has reached the fully open position B2.
In the fully open position B2, the closing members 15, 16, and 17 of the opening / closing body 10 during the opening operation cover the fully open detection part A2.

Note that the first unit 40a and the second unit 40b may have a reverse relationship between the projector and the light receiver. That is, a large number of light receivers may be provided in the first unit 40a, and a large number of light projectors may be provided to face the second unit 40b.
As another example, a light projector and a light receiver may be provided in one unit, and a reflector may be provided in the other unit so that light emitted from the light projector is reflected and captured by the light receiver.

According to an example of the present embodiment, the control circuit 50 is configured by 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 the cooperation of the two control circuits 51.
As another example, the control circuit 50 can be composed of one or more control circuits.

  Next, basic operations of the sensor control circuit 41 and the opening / closing body control circuit 51 will be described.

<Obstacle detection operation>
As a basic operation of the sensor control circuit 41, during the closing operation of the opening and closing body 10, at least a part (in other words, a part or all) of the light ray paths R are cut off substantially simultaneously. In this case, the closing operation prohibition signal is turned ON, and when all the light beam paths R are not blocked, the closing operation prohibition signal is turned OFF.

<Open / closed body detection invalid operation>
When a large number of light beam paths R are blocked in turn from the top to the bottom, the sensor control circuit 41 determines that the two light beam paths R and R are separated every two blocks. Regardless of whether or not the light beam path R is blocked for the photoelectric sensor closest to the lower side and all the photoelectric sensors positioned on the upper side of the photoelectric sensor, the closing operation prohibition signal is turned OFF.
However, the sensor control circuit 41, when the light path R, R of the two photoelectric sensors, which are the fully closed sensing unit A1, is blocked in order from the open direction side to the close direction side, it is predetermined from the time of the block. After the elapse of time (for example, about 3 seconds), the close operation prohibition signal is turned ON.
As another example, the condition “after a predetermined time (for example, about 3 seconds) has passed” may be set after a predetermined distance has passed. In this case, the predetermined distance may be detected by, for example, the fully closed / open detection unit 23a or may be detected by a separately provided sensor.

<Release cancellation of opening / closing body detection>
In the sensor control circuit 41, the light path R of a large number of photoelectric sensors returns from the cutoff state in order from the bottom to the top, and the light paths R, R of the two photoelectric sensors that are the fully open sensing unit A2. When only the blocking member 15, 16, 17 is blocked, the closing operation prohibition signal is turned from ON to OFF at the time of blocking.
As another example, during the opening operation of the opening / closing body 10, the closing operation prohibition signal may be turned from ON to OFF at the time when all the light paths R, R return from the blocking state.

  On the other hand, as shown in the flowchart of FIG. 8, the opening / closing body control circuit 51 determines whether or not the closing operation prohibition signal is ON (step 21). It prohibits (step 22), and when that is not right, the closing operation prohibition state of the opening-closing body 10 is cancelled | released (step 23).

<Example of control during actual operation>
Next, a control example in which the opening / closing body 10 is closed and opened between the fully open position and the fully closed position will be described in detail with reference to the flowcharts and time charts shown in FIGS.

First, in the state where the opening / closing body 10 is closed from the fully opened position and the blocking members 15, 16, 17 have entered the multiple light beam paths R, for example, the light beam path closest to the lower side of the blocking members 15, 16, 17. When the ray path R below R is obstructed by an obstacle (for example, a car, luggage, animal, person, etc.) or a foreign object (for example, garbage, dead leaves, snow, mud, etc.), the sensor control circuit 41 The closing operation prohibition signal is turned ON, and in response to this, the opening / closing body control circuit 51 stops the closing operation of the opening / closing body 10 (at time P1 in FIG. 9).
Then, after the obstacle or foreign matter is removed, for example, when there is a closing command by a closing operation switch or the like, the closing operation of the opening / closing body 10 is resumed (see FIG. 9, time point P2). When an opening command is given by an opening operation switch or the like, the opening / closing body 10 opens (not shown).

  Next, during the closing operation of the opening / closing body 10, the sensor control circuit 41 waits for a detection by the fully closed sensor A <b> 1 (specifically, blocking of the light path R, R of the fully closed sensor A <b> 1) ( If there is a sense (FIG. 6, step S1) (FIG. 9, time point P3), it waits for a predetermined time (about 3 seconds) from that time (step S2).

On the other hand, when the opening / closing body control circuit 51 recognizes the fully closed state of the opening / closing body 10 based on the signal of the fully closed / opening detection unit 23a, the opening / closing body 10 stops the closing operation (at time P4 in FIG. 9).
Thereafter, the sensor control circuit 41 turns on the closing operation prohibition signal on condition that the predetermined time has elapsed (see step S3: FIG. 9, time point P5).

For this reason, the opening / closing body control circuit 51 prohibits the closing operation of the opening / closing body 10 (refer to steps S21 to S22 in FIG. 8), and maintains this closing operation prohibition state.
The predetermined time is preferably set in advance to be equal to or longer than the time from when the opening / closing body 10 passes through the fully closed sensing unit A1 until it is fully closed. After the setting, it is preferable that the predetermined time can be changed. However, as another example, the predetermined time may be disabled.

  Next, when an opening command is issued by an opening switch or the like, the opening / closing body control circuit 51 starts the opening operation of the opening / closing body 10 while maintaining the ON state of the closing operation prohibition signal (see P6 in FIG. 9).

During this opening operation, the sensor control circuit 41 waits for a detection by the full opening detection unit A2 (specifically, only the light path R, R of the full opening detection unit A2 is blocked) (FIG. 7, step S11). If so, the process proceeds to the next step S12.
Next, the sensor control circuit 41 determines whether or not the light beam path R has returned for photoelectric sensors other than the photoelectric sensor that constitutes the fully open sensing unit A2 (step S12). The signal is turned off (step S13: FIG. 9, time point P7).
For this reason, after that, the opening / closing body control circuit 51 causes the opening / closing body 10 to be closed when there is a closing command by a closing switch or the like.

Therefore, for example, during the opening operation, before the opening / closing body 10 is detected by the full opening detection unit A2, the closing operation prohibition signal is maintained in the ON state regardless of the presence or absence of foreign matter or obstacles in the light path R. Therefore, the opening / closing body 10 cannot be closed by operating the closing switch.
In addition, after the opening / closing body 10 is detected by the full-opening detection unit A2 (FIG. 9, time point P7 and thereafter), the closing operation prohibition signal is turned off, so that foreign matter, obstacles, and the like are present in many light beam paths R. If not, the opening / closing body 10 can be closed by operating a closing switch or the like.

  Even after the opening / closing body 10 is sensed by the full-opening sensing unit A2 (FIG. 9, after P7), if there are foreign objects, obstacles, etc. in many light beam paths R, the closing operation prohibition signal is generated. Since it is maintained ON (see FIG. 9), the opening / closing body 10 cannot be closed by operating a closing switch or the like.

That is, according to the opening / closing device 1 having the above-described configuration, the foreign matter adheres to the photoelectric sensor or the obstacle enters the light path R until the opening / closing body 10 during the opening operation reaches the fully open position B2. Regardless, the opening / closing body 10 does not close even if there is a closing operation.
Further, the opening / closing body 10 opened from the fully closed position does not close from a relatively low position (below the fully opened position B2).
Therefore, it is possible to reduce the possibility that the opening / closing body 10 contacts the obstacle by performing good obstacle detection control.

  The opening / closing body 10 can be stopped by operating a stop switch (not shown) at any time during the above operation.

  Further, according to the above embodiment, as a particularly preferable aspect, the fully closed sensor A1 and the fully opened sensor A2 are configured by some photoelectric sensors of the multi-optical axis sensor 40, but the fully closed sensor A1 and As another example of the full opening detection unit A2, a configuration other than the multi-optical axis sensor 40 may be used.

  Further, according to the guide rail 30 shown in FIG. 2, the guide rail body 32 is fixed to the fixed support 31 by fixing tools (screws, bolts, etc.) on both sides in the opening / closing body thickness direction. The guide rail body 32 is hooked to the fixed support 31 on the outdoor side (lower side in FIG. 2) without using the fastening tool, and is fastened only by the fastening tool on the indoor side (upper side in FIG. 2). A structure is also possible. According to this structure, crime prevention and maintenance can be improved.

Further, according to the above embodiment, as a preferable example, the light passage hole 33b1 is a long hole through which a part of the light path R passes, but as other examples of the light passage hole 33b1, It is also possible to form a long line in the vertical direction so as to include the light ray path R.
Furthermore, as another example of the light passage hole 33b1, it can be formed in a notch shape or a slit shape. For example, the guide rail 30 is composed of two members divided in the opening / closing body thickness direction, and a cutout portion is provided in one and the other member, and the two cutout portions are combined to form the light passage hole 33b1. May be configured.

Moreover, according to the said embodiment, as a preferable example, the light passage hole 33b1 is formed in a long shape extending in the opening / closing body opening / closing direction so as to pass a plurality of light ray paths R which are a part of the many light ray paths R. As another example, as shown in FIG. 10A, the opening / closing body opening / closing direction is such that the light passage hole 33b1 passes through a plurality of light ray paths R among all the light ray paths R. It is also possible to form an elongated shape.
In this case, more preferably, as shown in FIG. 10B, reinforcing members 33b2 are provided at appropriate intervals in the longitudinal direction of the light passage hole 33b1. The reinforcing member 33b2 is fixed to the guide rail 30 so as to straddle both long edges of the light passage hole 33b1 between the light projecting surfaces 40a1 (or light receiving surfaces) adjacent vertically. According to this configuration, the strength of the guide rail 30 (specifically, the inner guide rail 33 and the guide rail main body 32) can be reduced by the reinforcing member 33b2 due to the long light passage hole 33b1.

  Moreover, according to the said embodiment, although the light projection surface 40a1 (or light-receiving surface) was set as the structure exposed to external air by the opening-closing body 10 side in an opening-closing body width direction, as another example, each light passage hole 33b1. May be covered with a transparent member (for example, a plate) or a transparent member. According to this configuration, it is possible to prevent the light projecting surface 40a1 (or the light receiving surface) from becoming dirty or damaged due to object contact or the like.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1: Opening / closing apparatus 10: Opening / closing body 15, 16, 17: Closing member 20: Storage part 30: Guide rail 40: Multi-optical axis sensor 40a: 1st unit 40b: 2nd unit 41: Sensor control circuit 50: Control Circuit 51: Opening / closing body control circuit R: Ray path A1: Fully closed sensing unit A2: Fully opened sensing unit B1: Fully closed position B2: Fully opened position

Claims (10)

An opening / closing body that performs a closing operation so as to partition a space, a fully-closed sensing unit that senses that the opening / closing body being closed has reached a fully-closed position, and the opening / closing body that is opening from the fully-closed position Comprises a fully open sensing unit that senses that the fully closed position on the opening direction side of the fully closed position has been reached, and a control circuit,
The control circuit prohibits the closing operation of the opening / closing body after the opening / closing body in the closing operation is detected by the full closing detection unit, and the opening / closing body in the opening operation is in a closed state. An opening / closing device, wherein the opening / closing device is released when detected by the full opening detection unit.   2. The control circuit according to claim 1, wherein when the opening / closing body in a closing operation is detected by the full closing detection unit, the control circuit sets the closing operation prohibited state after a predetermined time has elapsed since the detection. Switchgear.   3. The switchgear according to claim 2, wherein the predetermined time is set to be equal to or longer than a time from when the open / closed body in the closing operation is sensed by the fully-closed sensing unit until it is substantially fully closed. A multi-optical axis sensor that forms a number of light beam paths by a large number of photoelectric sensors arranged in the opening / closing direction of the opening / closing body and senses a blocking state of these light beam paths,
In this multi-optical axis sensor, among the many photoelectric sensors, a photoelectric sensor located on the closing direction side functions as the full closing detection unit, and the other is located on the opening direction side than the full closing detection unit. 4. The switchgear according to claim 1, wherein the photoelectric sensor is made to function as the full opening detection unit. 5. A multi-optical axis sensor that forms a large number of light paths by a large number of photoelectric sensors arranged in the opening / closing direction of the opening / closing body and turns on or off the output of the closing operation prohibition signal according to the blocking state of these light paths, An opening / closing device that prohibits the closing operation of the opening / closing body when the operation prohibiting signal is ON, and releases the closing operation prohibiting state when the closing operation prohibiting signal is OFF,
The multi-optical axis sensor causes two photoelectric sensors located on the closing direction side of the multiple photoelectric sensors to function as the fully closed sensing unit, and is located closer to the opening direction than the fully closed sensing unit. The other two photoelectric sensors to function as the fully open sensor,
In the multi-optical axis sensor, when two light paths are blocked in order from the open direction side to the close direction side, a photoelectric sensor closest to the close direction side of the two light path paths and the photoelectric sensor. For all photoelectric sensors located on the open direction side, regardless of whether the light path is blocked or not, the closing operation prohibition signal is turned OFF, and the light path of the fully-closed sensing unit is blocked. After the time point, the closing operation prohibition signal is turned from OFF to ON,
Further, in the multi-optical axis sensor, when the light paths of the multiple photoelectric sensors return from the shut-off state in order from the closed direction side to the open direction side, and only the light path of the full-opening sensing unit is turned off 2. The switchgear according to claim 1, wherein the closing operation prohibition signal is switched from ON to OFF after the cutoff time.   6. The closed operation prohibition state is released after the detection by the full opening detection unit and when there is no detection by the photoelectric sensor other than the full opening detection unit. Switchgear.   The said multi-optical axis sensor is provided in the position away from the contact | abutting object site | part of the said opening-closing body at the time of full closure in the open direction side by the predetermined dimension, The one of Claims 4-6 Switchgear. The switchgear according to any one of claims 4 to 7, wherein the plurality of light beam paths are coincident or substantially coincident with a central part of the open / close body in a thickness direction of the open / close body.
A guide rail that surrounds the widthwise end of the opening / closing body and guides in the opening / closing direction is provided, and the guide rail is provided with a light passage hole that allows the plurality of light beam paths to pass through.
The switchgear according to any one of claims 4 to 8, wherein a dimension of the light passage hole in a thickness direction of the switchgear is set smaller than a thickness dimension of the switchgear. A guide rail is provided that surrounds the widthwise end of the opening / closing body and guides in the opening / closing direction, and the guide rail is provided on one side opposite to the opening / closing body width direction,
The multi-optical axis sensor includes a first unit extending in the opening / closing body opening / closing direction in the one side guide rail, and a second unit extending in the opening / closing body opening / closing direction in the opposite guide rail. And is configured to form the multiple light beam paths between these two units,
The control circuit includes an opening / closing body control circuit for controlling an opening / closing operation of the opening / closing body,
A storage section for storing the opening / closing body is provided on the opening direction side of the opening / closing body, and in the storage section, the opening / closing body control circuit is provided closer to one side in the opening / closing body width direction,
One of the first unit and the second unit is configured to transmit a signal when an obstacle is detected in a non-contact manner to the opening / closing body control circuit through an electric wiring, and the electric wiring 9. The switchgear according to claim 4, wherein at least a part of the switch is disposed in the guide rail located closer to the one side.

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