JP2001214678A - Obstacle detector for opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an obstacle detector for an opening and closing device capable of preventing dust from collecting on a reflection member and ensuring normal operation. SOLUTION: A controller for controlling a driving device of a shutter curtain 5 as an opening and closing body controls closing operation of the curtain when a ray emitted from a light emitter is reflected on the reflection member 13 and is received by a light receiving device. In a normal time, the reflection member 13 takes up an approximately vertical posture in a covering state with a covering section 17 of a cover member 16, a detection lever 14 mounted to the curtain 5 is brought into contact with the obstacle by the closing operation of the curtain 5, the lever 14 makes rotational displacement with the rotational center section 14A as the center to make the reflection member 13 get out of the covering section 17 by rotation with a shaft 15A as the center with interlocking operation of an interlocking member 20 to keep it in a state of horizontal exposure, and the reflection member 13 reflects the ray to receive it by the light receiving device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an obstacle detecting device for an opening / closing device for detecting the presence of an obstacle in front of a closing opening / closing member and controlling the movement of the opening / closing member. For example, the present invention can be used for an automatic or manual opening / closing device such as a building shutter including an over-sliding door and a door device.

[0002]

2. Description of the Related Art Some types of shutters for buildings, which are opening and closing devices, are electrically operated to automatically open and close a shutter curtain, which is an opening and closing body. The automatic shutters for buildings are guided by guide rails to close. When an obstacle is present in front of the operating shutter curtain, an obstacle detection device for detecting the obstacle and stopping the shutter curtain is provided.

In the case where the obstacle detecting device is of an optical type, an optoelectronic device having a light emitting means and a light receiving means is arranged on a stationary member such as a shutter case of a building shutter, and a shutter curtain is provided with a photoelectric device. A reflecting member for reflecting a light beam emitted from the light emitting means and receiving the reflected light by the light receiving means is provided. In addition, a displacement member that makes a displacement such as rotation when it comes into contact with an obstacle is disposed at an end on the closed side of the shutter curtain, and the displacement member and the reflection member are turned to the reflection member by the displacement of the displacement member. They are connected by obstacle detection interlocking means for causing displacement such as movement.

Accordingly, there is an obstacle in front of the shutter curtain that is closing, and the reflecting member is displaced by the obstacle detection interlocking means when the displacing member comes into contact with the obstacle, and the light is emitted from the light emitting means. The relationship between the light beam reflected by the reflecting member and the light receiving device receiving the light beam changes, and a driving signal for inputting a signal to the control device to open and close the shutter curtain is controlled,
The shutter curtain performs operations such as performing an opening operation after stopping.

A conventional obstacle detecting device is disclosed in Japanese Utility Model Publication No. 56-9 / 1981.
As described in Japanese Patent Application Laid-Open No. 835-835 and Japanese Patent Application Laid-Open No. 2-256785, when the shutter curtain performs a normal closing operation, the light emitted from the light emitting means and reflected by the reflecting member is received by the light receiving means. On the other hand, when the displacement member provided on the shutter curtain comes into contact with an obstacle, the reflection member rises and performs a displacement such as rotation so that the light beam cannot be received by the light receiving means. Has become.

[0006]

As described above, in the conventional obstacle detecting device, the state of the reflecting member is set such that the light beam emitted from the light emitting means and reflected by the reflecting member is normally received by the light receiving means. At this time, the state of the reflection member is a state in which the reflection member faces the light emitting unit and the light receiving unit, so that the reflection member is exposed to the outside.
When the state of the reflecting member in a normal state is set as described above, the reflecting member is exposed even when the shutter curtain has reached the fully opened position, and thus the time during which the reflecting member is exposed becomes longer.

For this reason, dust easily accumulates on the surface of the reflection member, and when the dust accumulates, the reflection member does not reflect the light beam from the light emitting means, and as a result, the obstacle detection device may malfunction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an obstacle detecting device for an opening / closing device which prevents dust from accumulating on a reflecting member and can ensure normal operation.

[0009]

According to the present invention, there is provided an obstacle detecting apparatus for an opening / closing device according to the present invention, which includes a driving unit for opening and closing the opening / closing body, a control unit for controlling the driving unit, and a light emitting unit for emitting a light beam. A reflecting member for reflecting a light beam from the light emitting unit, a light receiving unit for receiving the light beam reflected by the reflecting member, and the light receiving when the light receiving unit does not receive the light beam Control means for controlling the driving means of the driving means based on a signal from the means; and an obstacle provided in the opening / closing body, the obstacle being located in front of the opening / closing body being closed. When the obstacle is detected by the detecting means, the reflecting member is changed to a state different from when the obstacle is not detected by the light receiving means and the light receiving means. Can receive The obstacle detection device of which switchgear and an obstacle detecting interlocking means for causing a change in the relationship between the serial light, the obstacle detection interlocking means,
When the obstacle is not detected by the detection unit, the reflection member is hidden, and when the obstacle is detected, the reflection member is exposed, and the light beam reflected by the reflection member is received by the light reception unit. It is characterized by having.

According to this obstacle detecting device, when the detecting means does not detect an obstacle, the reflecting member is hidden by the obstacle detecting interlocking means. When the obstacle is detected, the reflecting member is in the obstacle detecting state. Since the opening / closing body reaches the fully open position due to the exposure state by the interlocking means, the reflection member is hidden in a normal state where most of the time is spent such as when the opening / closing body has reached the fully open position. For this reason, dust hardly accumulates on the reflection member, and malfunction of the obstacle detection device can be prevented.

In the above, the hidden state and the exposed state of the reflection member may be realized by causing the reflection member to perform displacement such as rotation by the obstacle detection interlocking means.
Alternatively, the reflecting member is fixedly arranged at a fixed position, and a covering member for covering the reflecting member by performing a displacement such as rotation by the obstacle detection interlocking means is prepared, and the covering member is displaced. Is also good.

The detecting means provided on the opening and closing body for detecting an obstacle may be a mechanical type, for example, an electric type or a magnetic type. Alternatively, an optical type may be used.

The obstacle detection interlocking means for changing the reflection member from the hidden state to the exposure state when the detection means detects an obstacle is of any type corresponding to the type of such detection means. The obstacle detection interlocking means may be a mechanical type, an electric type, a magnetic type, or an optical type.

When the detecting means is of a mechanical type, the detecting means is disposed at the closed end of the opening / closing body, and is displaced by a contact force when it comes into contact with an obstacle. As a member, the movement of this displacement may be rotation, linear movement, or any other movement.

Further, the light emitting means and the light receiving means may be integrated or may be separated.

Further, the light emitting means, the light receiving means and the reflecting member may be arranged on the opening / closing body or may be arranged on a stationary member of the opening / closing device. Then, the light emitting means, the light receiving means, and the reflecting member may be arranged separately for the opening / closing body and the immovable member.

The driving means for opening and closing the opening and closing body may be of an electric type, a hydraulic type by hydraulic or gas pressure, or a type using energy other than these.

The control means for controlling the driving of the driving means can be of any type according to the type of the driving means.

Further, the detecting means detects an obstacle,
Thus, when the light beam emitted from the light emitting unit and reflected by the reflecting member is received by the light receiving unit, the control unit may control the driving unit to stop the opening / closing body at that position. Alternatively, the opening operation may be performed after the stop, or the closing operation force may be reduced. In short, the operation or the operation force of the opening / closing body with respect to the obstacle may be changed and controlled.

Further, when the obstacle detection interlocking means is configured to displace the reflecting member from a position where the obstacle is not detected when the detection means detects the obstacle, The opening / closing body is provided with a cover for covering and hiding the reflection member when an obstacle is not detected by the detection means. This makes it possible to keep the reflecting member in a hidden state in a normal state where the obstacle is not detected by the detecting means, and it is possible to prevent dust from accumulating on the reflecting member.

In the case where such a cover is provided on the opening / closing body, the cover may be made of any material as long as it can keep the reflection member in a concealed state and prevent dust from adhering to the reflection member. Any shape or structure, such as covering only the surface or only a predetermined light reflecting portion of the surface, may be used,
It is preferable to cover the entire circumference and the surface of the reflection member.

When the cover is formed as described above, when the reflection member is hidden by the cover, the whole of the reflection member can be substantially isolated from the outside, which is important for the light reflection function of the reflection member. The accumulation of dust on the surface can be prevented for a long period of time.

The movement for displacing the reflecting member when the detecting means detects an obstacle may be a movement for linearly moving the reflecting member. However, the reflecting member is rotatable about an axis. It is preferable that the reflection member be displaced from the hidden state to the exposed state by the rotation.

[0024] In this case, since the rotating motion can be realized by a simple structure, the simplification of the structure and stable operation can be ensured.

Further, the fully closed position when the opening / closing body reaches the fully closed position is a position where the edge of the opening to be opened / closed by the opening / closing body on the opening / closing body closing side is not detected by the detection means. Is preferred.

According to this, even when the opening / closing body reaches the fully closed position, the detecting means does not detect the edge of the opening on the closing side of the opening / closing body, and when the opening / closing body reaches the fully closed position. It is possible to prevent the detecting means from erroneously detecting the edge as an obstacle.

In the case where the fully closed position of the opening / closing body is set as described above, when the detecting means is a displacement member provided at the closed end of the opening / closing body and displaced by contact with an obstacle, The position where the displacement member abuts on the edge of the opening on the closing side of the opening / closing body and is not displaced is defined as the fully closed position of the opening / closing body.

One specific structural example for realizing this is at least one of a guide member for guiding the opening / closing operation of the opening / closing body, and a closed end of the opening / closing body guided by the guide member. Further, a fully closed position adjusting member is provided for setting a position where the displacement member abuts on an edge of the opening on the closing side of the opening and closing position so as not to be displaced as a fully closed position of the opening and closing body.

Another example is to dispose a sensor such as a limit switch on the guide member and stop the driving means by a signal from this sensor when the opening / closing member reaches the fully closed position. A means for counting the amount of movement of the opening / closing body, the driving amount of the driving means for the opening / closing body, the moving time of the opening / closing body, or the driving time of the driving means for the opening / closing body, wherein The driving means is stopped when it is detected that the closed position has been reached.

These examples can be applied to the case where the fully closed position of the opening / closing body is set by the fully closed position adjusting member.

The obstacle detecting device according to the present invention can be applied to any opening / closing device. One example is an automatic building shutter including an oversliding door, and another example is an automatic shutter device including an automatic shutter device and a door device. A hinged door device, an automatic partitioning device, an automatic roll screen device, an automatic blind device, and the like.

The opening and closing operation of the opening and closing body may be a rotation.
The movement may be linear, curved, or bent. The linear, curved, or bent movement direction may be a vertical direction, a horizontal direction, or a direction inclined with respect to these directions.

When the opening / closing device to which the obstacle detection device according to the present invention is applied is a shutter for an automatic building, the shutter curtain as the opening / closing member may be made of a slat or a sheet. , A panel, a pipe, a net, or a combination of at least two of them.

Further, the present invention is also applicable to an opening / closing device in which one of the opening and closing operations of the opening / closing body is performed by the weight of the opening / closing body itself and the other is performed by automatic means such as a motor or a manual operation. In this case, the driving means for the opening / closing body is a driving means including a brake for stopping the closing operation of the opening / closing body, including a manual operation for the other side.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The embodiment to be described below is a case where the opening / closing device is an automatic building shutter, and FIG.
FIG. 1 is a partially broken front view of an automatic building shutter 2 applied to an opening 1 such as a window of a building, as viewed from the outdoor side.

The building shutter 2 includes a shutter case 3 mounted on a wall above the opening 1 and a winding shaft 4 rotatably mounted inside the shutter case 3.
The upper end is connected to the horizontal take-up shaft 4, and the take-up shaft 4
The shutter curtain 5 which can be unwound and wound up from the winding shaft 4 by the rotation of the shutter 1 and the shutter curtain 5 which is attached to the left and right walls of the opening 1 and which is openable and closable, can slide at both right and left ends. And a guide rail 6 that guides the opening and closing operation of the shutter curtain 5 by being inserted into the shutter case 5, and is disposed inside the shutter case 3 and connected to the winding shaft 4 via a transmission mechanism 7 such as a sprocket or a chain. And a control device 9 for controlling the driving of the switch 8.

The switch 8 is connected to the winding shaft 4 via the transmission mechanism 7.
The opening / closing device 8 is a driving means for opening and closing the shutter curtain 5. Control device 9
Is a control means for controlling the driving of the driving means.

When the close switch (not shown) is operated while the shutter curtain 5 is fully opened, the take-up shaft 4 is rotated forward by the forward drive of the motor of the switchgear 8, and the shutter curtain 5 And the shutter curtain 5 performs a closing operation. When the shutter curtain 5 reaches the fully closed position, a signal from a sensor by a limit switch or the like provided on the guide rail 6 is input to the control device 9 or the rotation speed of the motor provided in the control device 9 It is detected by the counting means that counts that the shutter curtain 5 has reached the fully closed position, whereby the motor of the switch 8 is stopped by the signal from the control device 9 and the brake of the switch 8 is actuated. Then, the shutter curtain 5 is stopped at that position. On the other hand, when an open switch (not shown) is operated, the brake of the switch 8 is released, and the winding shaft 4 is rotated in reverse by the reverse drive of the motor of the switch 8, and the shutter curtain 5 is wound on the winding shaft 4. And perform the opening operation. When the shutter curtain 5 reaches the fully opened position, a signal from a sensor provided on the guide rail 6 is input to the control device 9, or the counting means detects that the shutter curtain 5 has reached the fully opened position, As a result, the motor of the switch 8 is stopped by the signal from the control device 9, the brake of the switch 8 is operated, and the shutter curtain 5 stops at that position.

The stop of the shutter curtain 5 at the fully open position is performed by rotating the motor of the switch 8 even after the lowermost portion of the shutter curtain 5 comes into contact with the lintel of the shutter case 3. The detection may be performed by stopping the motor by detecting the load and activating the brake.

The photoelectric device 1 is provided inside the shutter case 3.
The photoelectric device 10 includes a light emitting unit 10A and a light receiving unit 10B that are arranged downward. The shutter curtain 5 is formed by connecting a large number of slats 11 vertically and connecting a seat plate 12 to the lowermost portion. A reflection member 13 is disposed on the indoor side surface of the seat plate 12 at a position directly below the light emitting unit 10A and the light receiving unit 10B of the photoelectric device 10. This reflection member 13
Is exposed as described later, the light emitting means 10
Light rays emitted downward from A are reflected upward by the reflection member 13 and received by the light receiving means 10B. When the light beam is received by the light receiving means 10B as described above, the photoelectric device 10 outputs an electric signal to the control device 9, and based on this, the control device 9 outputs a predetermined control signal to the switchgear 8. I have.

FIG. 2 is an enlarged view of the indoor side showing the location of the seat plate 12 where the reflection member 13 is disposed, and FIG. 3 is a sectional view taken along line S3-S3 of FIG. As shown in FIG. 3, a seat plate 12, which is an end member on the closing side of the shutter 5, is a displacement member that is rotated and displaced when it comes into contact with an obstacle, and serves as a detecting means for detecting the obstacle. Detection lever 1
4, the detection lever 14 is attached to the opening 1
, And is rotatable in a vertical plane with respect to the seat plate 12 about a rotation center portion 14A which is an upper end portion on the indoor side. In addition, the detection lever 14 includes
Due to its own weight, a turning force in the counterclockwise direction in FIG. 3 always acts around the turning center portion 14A.

A protrusion 14B protruding forward is formed at the upper end on the outdoor side of the detection lever 14, and a downward opening 12A for accommodating the protrusion 14B therein is provided below the seat plate 12. The projection 14B is locked to a receiving portion 12B protruding from the lower end of the downward opening 12A to the indoor side, so that the detection lever 14 is prevented from rotating by its own weight about the rotation center portion 14A. Have been. This state is a normal state, and the shutter curtain 5 performs the opening and closing operation while the detection lever 14 maintains this state.

As shown in FIGS. 2 and 3, the reflection member 13 is attached to the outdoor surface of the holder member 15,
The holder member 15 is rotatable up and down around shafts 15A at both left and right ends. Since these shafts 15A are inserted into holes of bearing portions 16A formed on both right and left ends of a cover member 16 attached to the seat plate 12, the holder member 15 is supported by the cover member 16. Also,
The holder member 15 is provided with an arm portion 15B extending forward from the left and right shafts 15A (when the reflecting member 13 is in a substantially vertical posture as shown in FIG. 4, toward the outdoor side).

FIG. 4 is a longitudinal sectional view of the reflection member 13 attached to the holder member 15 and shows the covering member 1.
6 shows a state where the holder member 15 is in the hidden state. FIG. 5 is a view when the reflection member 13 is rotated from the position of FIG. 4 around the shaft 15A of the holder member 15 to be in an exposed state. The covering member 16 has an upper ceiling 16B, a lower floor 16C, and extends between the left and right ends of the ceiling 16B and the floor 16C in the vertical direction between the left and right bearings 16A. Left and right side walls 1
6D are formed. As shown in FIG. 4, when the reflecting member 13 is in a substantially vertical posture facing the seat plate 12, the reflecting member 13 moves the ceiling 16 </ b> B, the floor 16 </ b> C, and the side wall 16 </ b> D as shown in FIG. 3. Has penetrated into the space surrounded by. Therefore, the ceiling 16B and the floor 1
6C, the side wall portion 16D, and the surface of the seat plate 12 on the indoor side to cover the reflecting member 13 in a hidden state.
7, and such a cover portion 17 is provided on the seat plate 12 of the shutter curtain 5 in the present embodiment. In the present embodiment, as shown in FIG. 4, the cover member 16 is also provided with a front surface 16 </ b> E that covers a part in front of the reflection member 13.

Since the cover 17 is formed as described above, when the reflection member 13 is hidden by the cover 17,
The entire periphery and the surface of the reflecting member 13 are covered with the covering portion 17.

The covering member 16 has a stopper portion 1 that extends below the floor portion 16C and extends indoors from the floor portion 16C.
6F is formed, and when the reflecting member 13 rotates toward the indoor side around the shaft 15A of the holder member 15 as shown in FIG. 5, the back surface of the holder member 15 comes into contact with the stopper portion 16F so that that of the reflecting member 13 is formed. The above rotation is prevented. As a result, the reflection member 13 is in a horizontal upwardly exposed state when the cover portion 17 escapes.

As shown in FIG. 2, a base 20A of the interlocking member 20 is applied to the indoor side surface of the detection lever 14, and the interlocking member 20 is provided at both left and right ends of the base 20A in FIG. As shown, an arm portion 20B is formed which is inserted into a penetrating portion 14C formed by partially cutting out the detection lever 14. Since these arm portions 20B are coupled to the detection lever 14, the interlocking member 20 rotates around the rotation center portion 14A integrally with the detection lever 14.

As shown in FIG. 2, extending portions 20C extending upward are formed at both left and right ends of the base portion 20A of the interlocking member 20, and the holder member 15 and the holder member 15 are provided at the tips of these extending portions 20C. Claw portion 20D that has entered between the seat plate 12
Is provided. When the detection lever 14 is in the normal state shown in FIG. 3 due to the own weight of the detection lever 14 and the own weight of the interlocking member 20, these claws 20D
It is almost vertically downward as shown by.

6 to 8 show the relationship between the detection lever 14 and the interlocking member 20 and the reflection member 13 without the covering member 16. FIG. 6 shows a state in which the detection lever 14 and the interlocking member 20 are in a normal state, and FIG.
From the detection lever 14 and the interlocking member 20
FIG. 8 shows a state in which the detection lever 14 and the interlocking member 20 further rotate in the clockwise direction to reach the rotation limit.

When the detection lever 14 and the interlocking member 20 are in the state shown in FIG. 6, the claw portion 20D of the interlocking member 20 is in contact with the upper surface of the arm portion 15B of the holder member 15. The position of the center of gravity of the holder member 15 including the weight of the reflection member 13 attached to the holder member 15 is
Since the upper part of the shaft 15A of the holder member 15 is located closer to the indoor side than the shaft 15A, the holder member 15 is always inclined to the indoor side around the shaft 15A. This claw portion 20 contacts the upper surface.
Since the interlocking member 20 and the detecting lever 14 having the D are in the state shown in FIGS. 3 and 6 due to their own weight in normal times, the holder member 15 and the reflecting member 13 are normally used.
Is in the position of FIG. That is, the reflection member 13 is hidden by the cover portion 17 of the cover member 16.

On the other hand, the detection lever 14 comes into contact with the obstacle 21 shown in FIG. 1 during the closing operation of the shutter curtain 5 and the shutter curtain 5 subsequently closes. When the pivot 14 rotates clockwise in FIG. 6 about the pivot center portion 14A, the holder member 15 and the reflecting member 13 go into the state of FIG. 8 through the state of FIG. The protrusion 14 </ b> B of the detection lever 14 is the downward opening 1 of the seat plate 12.
In the rotation limit of FIG. 8 in contact with the inner lower surface of 2A, the back surface of the holder member 15 contacts the stopper 16F of the cover member 16 shown in FIG. Escape to a horizontal upward exposure state.

On the other hand, the detection lever 14 is turned to the rotation center 14A.
When it is turned counterclockwise in FIG.
The state of FIG. 8 returns to the state of FIG. 6 via the state of FIG.

As described above, the detection lever 1 is
4 rotates about the rotation center portion 14A, the interlocking member 2
By the interlocking action of 0, the reflection member 13 also becomes the holder member 15.
In this embodiment, the interlocking member 20 constitutes an obstacle detection interlocking means for displacing the reflecting member 13 in conjunction with the displacement movement of the detection lever 14. Has become.

As shown in FIG. 1, a stopper member 22 is disposed at the lowermost portion inside the left and right guide rails 6. The height dimension of these stopper members 22 is
When the ends of the seat plate 12 of the shutter curtain 5 inserted into the left and right guide rails 6 abut against these stopper members 22 by the closing operation of the shutter curtain 5, the left and right ends of the guide rail 6 The detection lever 1 that is not inserted into the inside abuts on the closed side end of the shutter curtain 5 in the opening 1, that is, the lower edge 1A of the opening 1, and rotates around the rotation center portion 14A. The dimensions are set so as not to be displaced. Seat plate 12 at this time
Is the position A shown in FIG. 1, and this position A is
Although the detection lever 14 contacts the lower edge 1A, the detection lever 14 is at a position where the detection lever 14 does not rotate around the rotation center portion 14A, and is at a position where the lower edge 1A is not detected by the detection lever 14.

Next, the operation will be described. When the shutter curtain 5 is in the fully open state, the close switch is operated, whereby the shutter curtain 5 performs a closing operation, and is moved forward in the moving direction of the shutter curtain 5 guided by the guide rail 6 shown in FIG. When the detection lever 14 comes into contact with the obstacle 21, the detection lever 14 shifts from the state of FIG. 6 to the state of FIG. 7 and FIG. The member 13 and the holder member 15 are also changed from the state of FIG. 6 to the state of FIGS. When the detection lever 14 reaches the rotation limit in FIG. 8, the back surface of the holder member 15 contacts the stopper 16F of the cover member 16 as shown in FIG. It escapes from the part 17 and becomes a horizontal exposure state.

On the other hand, at the same time when the shutter curtain 5 starts the closing operation by operating the closing switch, the photoelectric device 10
Since the light beam starts to be emitted downward from the light emitting means 10A, the reflecting member 13 is in a substantially vertical posture hidden by the cover portion 17 until the reflecting member 13 reaches the state shown in FIG. Light rays from the means 10A are not reflected by the reflecting member 13. Detection lever 14 is obstacle 21
When the reflecting member 13 is brought into the state shown in FIG. 5 by contacting the light, the light beam is reflected upward by the reflecting member 13, whereby the light beam is received by the light receiving means 10B. As a result, the photoelectric device 10 outputs a signal to the control device 9, and the control device 9 outputs a reverse drive signal after outputting a stop signal to the motor of the switchgear 8. Therefore, the shutter curtain 5 temporarily stops. And perform the opening operation.

When the shutter curtain 5 reaches the fully opened position, a signal from a sensor provided on the guide rail 6 is input to the control device 9 or the shutter curtain 5 reaches the fully opened position by the counting means. As a result, the motor of the switch 8 is stopped by the signal from the control device 9, the brake of the switch 8 is operated, and the shutter curtain 5 stops at the fully open position.

Further, as described above, the shutter curtain 5
When the opening operation is performed, the detection lever 14 returns to the state of FIG. 6 from the state of FIG. 8 through the state of FIG. 7 because the obstacle 21 separates, and accordingly, the reflection member 13 and the holder member 8 also returns from the state of FIG. 8 to the state of FIG. 6 via the state of FIG. 7, and the reflecting member 13 returns to the state hidden by the cover 17 of the cover member 16 as shown in FIG. .

When the shutter curtain 5 is closed when the obstacle 21 is not present, the left and right ends of the seat plate 12 inserted into the guide rail 6 come into contact with the stopper member 22. Thereby, the shutter curtain 5 reaches the fully closed position of the closing operation limit. When the shutter curtain 5 reaches the fully closed position set by the stopper member 22 serving as the fully closed position adjusting member, a signal from a sensor by a limit switch or the like provided on the guide rail 6 is transmitted to the control device. 9 or the counting means detects that the shutter curtain 5 has reached the fully closed position, whereby the signal from the controller 9 stops the motor of the switchgear 8 and the brake of the switchgear 8 Operates, and the shutter curtain 5 stops at its fully closed position.

As described above, according to the obstacle detecting device for the building shutter 2 according to the present embodiment, when the obstacle 21 is detected by the detecting lever 14, the reflecting member 1
Reference numeral 3 denotes an exposed state, and the reflection member 13 is normally hidden by a cover portion 17 of a cover member 16 provided on the shutter curtain 5 in a normal state. Since this normal time occupies most of the time during which the building shutter 2 is used, it is possible to prevent dust from accumulating on the reflection member 13, and as a result, malfunction of the obstacle detection device is prevented. Can be prevented. In addition, when the humidity is high such as during the rainy season, the reflection member 13 is normally covered with the cover portion 17 to prevent dew condensation on the surface of the reflection member 13,
It is also possible to prevent the obstacle detection device from malfunctioning due to the occurrence of the condensation.

Since the covering portion 17 of the covering member 16 covers the entire periphery and the surface of the reflecting member 13,
It is possible to prevent accumulation of dust and dew condensation on the surface of the reflecting member 13 for a long period of time.

The reflecting member 13 is freely rotatable around the shaft 15A of the holder member 15, and is changed into a hidden state and an exposed state by the cover portion 17 by this rotating displacement, so that the reflecting member 13 is rotatable. This can be achieved with a simple structure, so that the structure can be simplified and stable operation can be expected.

Further, according to the present embodiment, the detection lever 14 does not pivotally move on the guide rail 6 due to the contact with the lower edge 1A of the opening 1, in other words, the lower edge 1A of the opening 1. Is provided so that the fully closed position of the shutter curtain 5 can be set without being detected by the detection lever 14, so that when the shutter curtain 5 reaches the fully closed position without the obstacle 21, the detection is performed. The lever 14 does not pivotally move at the lower edge 1A of the opening 1 and the reflecting member 13 does not change from the hidden state to the exposed state.

Therefore, even when the shutter curtain 5 is lowered to the fully closed position, the state in which the reflecting member 13 is hidden by the cover portion 17 can be maintained. At this time, even in the fully closed position, dust is reflected on the reflecting member 13. It can prevent accumulation.

The stopper member 22 may be a position where a slight gap is opened between the detection lever 14 and the lower edge 1A of the opening 1 as a fully closed position of the shutter curtain 5. Is in contact with the lower edge 1A of the opening 1 and the detection lever 14 is slightly rotated about the rotation center portion 14A, but the position where the detection member 14 does not escape from the portion 17 covered by the reflection member 13 is fully closed of the shutter curtain 5. It may be a position.

[0066]

According to the present invention, it is possible to prevent dust from accumulating on the reflecting member and to obtain an effect that normal operation can be ensured.

[Brief description of the drawings]

FIG. 1 is a partially broken front view of an automatic building shutter as an opening / closing device according to an embodiment of the present invention, as viewed from the outdoor side.

FIG. 2 is an enlarged view of the inside of a room showing a location of a seat plate of a shutter curtain where a reflection member is arranged.

FIG. 3 is a sectional view taken along line S3-S3 of FIG. 2;

FIG. 4 is a vertical cross-sectional view of the reflection member attached to the holder member, and is a diagram when the reflection member is hidden by a cover portion of the cover member.

FIG. 5 is a longitudinal sectional view when the reflection member is rotated from the position of FIG. 4 about the axis of the holder member to be in an exposed state.

FIG. 6 is a longitudinal sectional view showing a relationship between a reflection member and an interlocking member that constitutes a detection lever and an obstacle detection interlocking unit that are detection means, omitting a cover member. FIG. 6 is a diagram showing a state in the state of FIG.

FIG. 7 is a longitudinal sectional view showing a state where the detection lever and the interlocking member have been rotated clockwise around the rotation center from FIG.

8 is a longitudinal sectional view showing a state in which the detection lever and the interlocking member further rotate clockwise from FIG. 7 to reach a rotation limit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Opening of windows etc. of a building 2 Automatic building shutter which is an opening / closing device 5 Shutter curtain which is an opening / closing body 6 Guide rail which is a guide member 8 Switchgear which is a driving means 9 Control device which is a control means 10 Optical device 10A Light emitting means 10B Light receiving means 12 Shutter curtain seat 13 Reflecting member 14 Detecting lever serving as detecting means and being a displacement member 20 Interlocking member constituting obstacle detecting interlocking means 21 Obstacle 22 Fully closed position adjusting member Stopper member

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshinobu Hanai 3-26-4 Shimura, Itabashi-ku, Tokyo Bunka Shutter Co., Ltd. F-term (reference) 2E042 AA01 BA01 CA01 CB02 CB07 CC03 DA01

Claims (7)

[Claims] 1. A driving unit for opening and closing an opening and closing body, a control unit for controlling the driving unit, a light emitting unit for emitting a light beam, a reflecting member for reflecting a light beam from the light emitting unit, Light receiving means for receiving the light beam reflected by the reflecting member, and controlling the driving means of the driving means based on a signal from the light receiving means when the light receiving means does not receive the light beam Control means, and detection means provided in the opening / closing body and detecting the obstacle when there is an obstacle in front of the opening / closing body that is closing, and the obstacle is detected by the detection means. Obstacle detection for changing the reflection member to a state different from when the obstacle is not detected to cause a change in the relationship between the light receiving means and the light beam received by the light receiving means. Interlocking hands And an obstacle detection device for a switchgear having a step, wherein the obstacle detection interlocking means hides the reflection member when the obstacle is not detected by the detection means, and when the obstacle is detected, the reflection member is hidden. An obstacle detecting device for an opening / closing device, wherein a reflecting member is exposed, and the light beam reflected by the reflecting member is received by the light receiving means. 2. The obstacle detecting device for an opening and closing device according to claim 1, wherein the obstacle detecting and interlocking means detects when the obstacle is not detected when the detecting means detects the obstacle. The reflecting member is displaced from a position, and the opening / closing body is provided with a cover portion for covering and hiding the reflecting member when the obstacle is not detected by the detecting means. Characteristic obstacle detection device for switchgear. 3. The obstacle detecting device for a switchgear according to claim 2, wherein the cover covers the entire periphery and the surface of the reflection member. Object detection device. 4. The obstacle detecting device for an opening / closing device according to claim 2, wherein the reflecting member is rotatable about an axis, and the turning causes the reflecting member to be in the hidden state and the exposed state. An obstacle detection device for a switchgear, wherein the obstacle detection device is displaced to a state. 5. The obstacle detecting device for an opening / closing device according to claim 1, wherein the fully closed position of the opening / closing member is an edge of the opening that is opened / closed by the opening / closing member on a closing side of the opening / closing member. An obstruction detection device for an opening and closing device, wherein a portion is located at a position not detected by the detection means. 6. The obstacle detecting device for an opening / closing device according to claim 5, wherein the detecting means is provided at a closed side end of the opening / closing body, and is displaced by contacting the obstacle. An obstacle detection of the opening and closing device, wherein a position where the displacement member is in contact with an edge of the opening on the closing side of the opening and not displaced is a fully closed position of the opening and closing body. apparatus. 7. The obstacle detecting device for an opening / closing device according to claim 6, wherein a guide member for guiding the opening / closing operation of the opening / closing member, and a closing-side end of the opening / closing member guided by the guide member. A fully-closed position adjustment member for setting a position where the displacement member abuts on the edge of the opening on the closing side of the opening and closing and is not displaced as a fully-closed position of the opening and closing part in at least one of the opening and closing part. An obstacle detection device for a switchgear, wherein