JP2608133B2 - Switchgear - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to an opening / closing device, for example, an electric weight and lightweight shutter or blind, an electric shutter, an automatic door, an overdoor, and the like. The present invention relates to a safety device when the opening / closing members are closed.

(Prior Art) Conventionally, as an opening / closing device of this type, in the case of an electric shutter, for example, a seat is connected to a lowermost slat via a seat plate so as to be vertically movable, In the vicinity of one end in the length direction, there is provided a reflector that is pivotally displaced by the vertical movement of the seating body, and a projector and a reflector that project detection light to the reflector above the reflector. There is a structure in which a light receiver for receiving the reflected detection light is provided, and a motor for opening and closing the shutter is controlled in accordance with a state of receiving the detection light.

(Problems to be Solved by the Invention) In the above-mentioned conventional structure, when the seating body comes into contact with a seating position or an obstacle when the shutter is lowered, the seating body is prevented from descending, and the reflecting plate is rotated and inclined by the seating body. ,
The detection light is not received by the light receiver, but in this case, when the shutter is wide and an obstacle is located far away from the installation position of the reflector, this seating body However, even if the part in contact with the obstacle is pushed up, the part opposite to the obstacle, that is, the reflecting plate side can be tilted or bent without being pushed up, and the reflecting plate can be sufficiently rotated. Therefore, there is a problem that the shutter may continue to descend even if the seating body contacts an obstacle.

In addition, since the reflecting plate has an uneven portion on the surface to reflect the detecting light in the incident direction even if the detecting light is slightly misaligned, the reflecting plate is always sufficiently rotated by the sitting body. It is necessary to move and tilt, but this has a problem that the structure is complicated and a failure easily occurs.

Therefore, the present invention has been made in view of such a problem, and when the lower end edge of the opening / closing body comes into contact with a regulating portion such as an obstacle when the opening / closing body is lowered, this is reliably detected. Accordingly, it is an object of the present invention to provide an opening / closing device that can reliably stop the lowering operation of the opening / closing body, and therefore has high safety and reliability, has a simple structure, and is less likely to break down. .

(Means for Solving the Problems) An opening / closing device according to the present invention includes an opening / closing body that is raised and lowered by driving an electric motor, a horizontal reflector fixed to a lower end edge of the opening / closing body, and an upper part of the reflector. A light emitter that is provided at a position and emits detection light toward the reflector, and a light receiver that receives the detection light reflected by the reflector. A detecting device for outputting a signal for stopping or reversing the driving of the electric motor; The sensor moves downward while being restricted by the restricting portion when pressed against the sensor, and rotates upward when the sensor is rotated, and is interlocked with the sensor when the sensor rotates upward. Projecting in an inclined state on the reflector, this reflector And a rotatable shield that shields the detection light projected toward it.

(Operation) In the opening / closing device of the present invention, when the opening / closing body is lowered,
The motor is driven and the opening / closing body is lowered. Further, the opening / closing body is lowered, and the light emitter of the detection device is activated, and the detection light is emitted from the light emitter toward the reflector, and the detection light is reflected by the reflector and received by the light receiver. The opening and closing body continues to be lowered.

Further, when the sensor at the lower end of the opening / closing body comes into contact with a regulating section that regulates the lowering of the opening / closing body such as a person or an article located in the lowering area of the opening / closing body when the opening / closing body is lowered, the regulating section is closed. The downward movement of the sensor is regulated and the sensor is pushed to rotate the sensor upward about the support shaft. Then, the shield is interlocked with the upward rotation of the sensor, and the shield is rotated upward of the reflector,
The shield is projected on the reflector in an inclined state, and the detection light that is projected toward the reflector is shielded by the shield.

Further, when the detection light is blocked by the shield and the detection light emitted from the light emitter of the detection device is not received by the light receiver, the driving of the electric motor is stopped by a signal from the detection device, and the lowering of the opening / closing body is stopped. It is stopped or the switch is raised in reverse. Therefore, since the opening / closing body is not further lowered, safety is ensured and damage to the opening / closing body is prevented.

Also, by retreating the regulation part from the lower part of the sensor,
The sensor automatically pivots downward, and in conjunction with the downward rotation of the sensor, the shield is pivoted back from above the reflector onto one side of the reflector, and is reflected. The upper part of the body is opened.

(Example) Hereinafter, an example of the present invention is described based on an accompanying drawing.

1 is a shutter as an opening and closing body for opening and closing the entrance,
The shutter 1 has a plurality of slats 2 formed in a horizontally long shape, and vertically arranged curl portions 3 formed on upper and lower edges in a width direction thereof are connected to each other so as to be rotatable. A curl portion 5 formed at the upper end of the seat 4 is rotatably connected to the curl portion 3 of the lowermost slat 2. Further, a shutter box 6 having a take-up drum rotatably driven by a motor M that is rotated forward and backward is fixed to an upper end portion of the entrance, and the shutter 1 is taken up by the take-up drum in the shutter box 6. And is rewound freely.

Vertical guide rails 7 are vertically erected at lower portions on both left and right sides of the shutter box 6, respectively. 8 are formed, and upper end portions of the left and right rail grooves 8 communicate with the inside of the shutter box 6, respectively. The shutter 1 is guided up and down by the left and right rail grooves 8, and the shutter 1 opens and closes the entrance. A vertical frame 9 for supporting the guide rail 7 is fixed to the inside of the left and right guide rails 7, and the upper ends of the left and right frame 9 are inserted into both sides of the shutter box 6. Have been.

Next, the seat body 4 has a seat plate 10 having a predetermined width and the same length as each of the slats 2, and a pair of front and rear vertical plates 11 is provided at a predetermined interval at an intermediate upper portion in the width direction of the seat plate 10. The curl portion 5 is formed on a top plate 12 which is integrally erected in opposition to each other, and is continuously provided between the upper ends of the front and rear vertical plates 11.
Further, guides 13 which are inserted into the rail grooves 8 of the left and right guide rails 7 so as to be vertically movable are protruded from both longitudinal ends of the pair of front and rear vertical plates 11.

Further, a lock mechanism (not shown) provided near a lower end of the rail groove 8 of the left and right guide rails 7 locks the space 14 between the pair of front and rear vertical plates 11.
Further, left and right lock bars 16 each having a locking portion 15 at the distal end having a locking portion 15 to be unlocked are provided to be able to advance and retreat, and the left and right locking bars 16 always protrude the locking portion 15 by an operation lever (not shown). The locking portion 15 is operated to be retracted in an emergency.

A front side plate 17 is provided at the lower end of the front edge of the seat plate 10 in the width direction.
A horizontal locking piece is provided at the lower end of the front side plate 17.
An inwardly projecting portion 18 is formed, and a bearing concave portion 19 having a substantially C-shaped cross section is formed at a lower portion of a rear edge of the seat plate 10 in a width direction and opened to an inner lower portion. Further, a stopper 20 is integrally protruded from an intermediate lower portion of the seat plate 10 in the width direction.

Reference numeral 21 denotes a sensing lever as a sensing body. The sensing lever 21 has a substrate portion 23 having a length corresponding to the length of the seat plate 10, and is provided at an upper portion of a rear end of the substrate portion 23 in a width direction. Rear plate 24
A support shaft 22 that is rotatably supported in the bearing recess 19 is formed horizontally and integrally at the upper end of the rear plate portion 24. Further, a front plate portion 25 higher than the height of the rear plate portion 24 is integrally formed on an upper portion of a front edge in the width direction of the substrate portion 23, and an upper end portion of the front plate portion 25 is provided with the locking piece 18. An engagement piece 26 that is engaged so as to be freely detachable is formed horizontally. Further, a buffer member 27 made of mohair or the like is fixed to a substantially lower portion in the width direction of the substrate portion 23.

The sensing lever 21 is rotatably supported in the up and down direction around the support shaft 22 fitted in the bearing recess 19, and always has its own weight with respect to the seat plate 10. As a result, the rotation of the sensing lever 21 is restricted by turning the support lever 22 inward and downward about the support shaft 22 and locking the engagement piece 26 to the locking piece 18.
Is rotated upward about the support shaft 22 from the state where the downward movement is restricted.

Reference numeral 29 denotes a substantially U-shaped bracket, and the bracket 29 is a rear plate portion near one end of the seat plate 10 of the seat body 4, that is, a portion near one guide rail 7.
It is fixed on the screw 28 by a screw 30. On the bracket 29, a reflector 31 as a reflector in the left-right direction is fixed horizontally.

Reference numeral 33 denotes a shield that shields an upper portion of the reflection surface of the reflection plate 31. The shield 33 is formed on the left and right rear plate portions of the seat plate 10.
The left and right substrates 36 are provided with substrates 36 which overlap each other, and support plates 37 formed in a substantially triangular shape are respectively erected on the left and right substrates 36, and between the front edge portions of the left and right support plates 37. A shield plate 38 made of a synthetic resin plate such as an acrylic resin or a polyacetal resin for opening and closing the upper part of the reflection plate 31 is integrally formed vertically.

Also, the sensing lever is provided at the rear end of the left and right substrates 36.
A support portion 39 is formed to fit into left and right mounting recesses 32 formed on the left and right portions of the support shaft 22 and the rear plate portion 24 of the support plate 21. A mounting plate 40 that overlaps is formed integrally. Then, the left and right support portions 39 of the shield 33 are fitted into the left and right mounting recesses 32 of the sensing lever 21, and the substrate portion of the sensing lever 21.
The left and right mounting plates 40 of the shield 33 are fixed to the substrate 23 by screws 35 in a state where the left and right mounting plates 40 of the shielding body 33 are superimposed on 23.

A small gap 41 is formed between the inner ends of the left and right legs 34 and the left and right support plates 37 and the outer ends of the left and right portions of the bracket 29 of the reflector 31. The shield 33 is installed rotatably with respect to the reflection plate 31 with a small gap 41, and the sensing lever 21 is attached to the seat plate 10 by the left and right legs 34 and the bracket 29. To prevent lateral displacement in the left-right direction.

When the sensing lever 21 is pivoted down about the support shaft 22 by its own weight and the engaging piece 26 is engaged with the locking piece 18, the shielding plate 38 of the shielding body 33 is one of the reflecting plate 31. Opening the upper side of the reflecting surface of the reflector 31 in a state where the side portion, that is, is located vertically above the front edge of the reflector 31,
When the sensing lever 21 is pushed and turned upward around the support shaft 22, a shield 33 is rotated in conjunction with the sensing lever 21, and the shielding plate 38 is The detection light, which will be described later and is projected toward the reflection surface of the reflection plate 31 and protrudes in a state of being inclined above the reflection surface, is shielded.

Further, reference numeral 43 denotes a detection device attached to the mounting frame 42 in the shutter box 6 corresponding to the position above the reflection plate 31, and the detection device 43 detects the detection light L toward the reflection surface of the reflection plate 31. , And a light receiver 45 arranged in parallel with the light projector 44 and receiving the detection light L reflected by the reflection plate 31. Further, the light projector 44 and the light receiver 45 are connected to a control device 47 for controlling the electric motor M via a cable 46.

By operating a switch for opening and closing the shutter 1, the control device 47 is operated.
The motor M is driven to rotate forward or reverse, and when the optical axis region of the detection light L is shielded by the shield plate 38 of the shield 33, the controller 47 sends the motor M A signal to stop or reverse the driving of the electric motor M is output to M. Reference numeral 48a denotes a lower frame laid between the lower ends of the guide rails 7 on the left and right sides.

 Next, the operation of the above embodiment will be described.

First, in the open state of the shutter 1 and in the normal state before the completion of the closing, as shown in FIGS.
Is rotated downward by its own weight around the support shaft 22 in the bearing recess 19, and the engaging piece 26 of the front side plate portion 25 is engaged with the locking piece 18 of the seat plate 10.
It is in a state of being suspended obliquely inward and inclined in a state of being locked up. When the sensing lever 21 is rotated downward, the right and left substrates 36 of the shield 33 are positioned on the rear plate of the seat plate 10.
The shield plate 38 supported between the support plates 37 on the left and right substrates 36 and the horizontal reflector 31 on the rear plate 28 Is positioned vertically above the front edge of the
The reflecting surface of 31 is open at the upper part so that the detection light L can enter and reflect.

Next, when the shutter 1 is closed, when the shutter closing switch is operated, the control device 47 is operated, the electric motor M is driven, and the winding drum is rotated in the rewinding direction of the shutter 1. The shutter 1 fed from the shutter box 6 by the winding drum is guided by the rail grooves 8 of the left and right guide rails 7 and descends. Further, the control device 47 is operated and the detection device 43 is operated.
Is activated, and the detection light L is emitted from the light projector 44 of the detection device 43 toward the reflection plate 31, and the detection light L is
The light is reflected upward and is received by the light receiver 45, and the controller 47 controls the motor M so that the shutter 1 is continuously lowered by the light receiving signal.

Further, when the shutter 1 is lowered, the substrate portion 23 of the sensing lever 21 at the lower end of the shutter 1 is restricted by a restricting portion located in the descending region of the sensing lever 21, for example, a failure of the shutter 1 such as a person or an article to fall. When the sensing lever 21 is pressed against the obstacle, the sensing lever 21 is pushed by the obstacle, and the sensing lever 21 is rotated clockwise in FIG. Similarly, the shield 33 integrated with the sensing lever 21 is rotated clockwise in FIG. 5, and the shield plate 38 of the shield 33 is rotated toward the upper part of the reflector 31.

Then, the engagement piece 26 of the sensing lever 21 which is disengaged upward from the locking piece 18 of the seat plate 10 is brought into contact with the lower surface of the seat plate 10, and the mounting plate 40 on the left and right legs 34 of the shielding body 33. Is in contact with the stopper 20 of the seat plate 10, and the shielding plate 38 is
The shield plate 38 protrudes in a state of being inclined with respect to the upper part, and the upper part of the reflective surface of the reflective plate 31 is reliably shielded by the shield plate 38.

Further, while the reflecting surface of the reflecting plate 31 is shielded by the shielding plate 38, the detection light L emitted from the light emitting device 44 of the detecting device 43 is not received by the light receiving device 45, but is emitted to the shielding plate 38. The detection light L is reflected by the inclined shielding reflection surface of the shielding plate 38 toward the vertical plate 11 at the rear of the seat 4. Further, when the detection signal from the light receiver 45 of the detection device 43 is stopped, a control signal is output from the control device 47 to the motor M to receive the control signal, and the driving of the motor M is controlled. Is stopped, or the shutter 1 is wound up. Therefore, the lowering of the shutter 1 is stopped by the rotation of the sensing lever 21 by an obstacle when the shutter 1 is lowered, so that safety is secured and the shutter 1 is prevented from being damaged.

Then, by retreating the obstacle from the lower end of the shutter 1, the sensing lever 21 automatically returns downward in the counterclockwise direction in FIGS. In conjunction with the rotation of the lever 21, the shield 33 is similarly rotated counterclockwise in FIGS. 3 and 4, and the engagement piece 26 is again locked by the locking piece 18, and The plate 38 deviates from the optical axis region of the detection light L and is returned to the vertically erected state, and the reflection surface of the reflection plate 31 is opened again.

In addition, the reflection surface of the reflection plate 31 is opened, and the light receiver 45 of the detection device 43 receives the detection light L reflected by the reflection plate 31, and a control signal is sent from the control device 47 to the motor M by the received light signal. Is output, and the shutter 1 is rewinded and lowered again by the electric motor M. As described above, the shutter 1 is controlled by the sensing lever 21, the reflection plate 31, the detection device 43, and the shield 33.
The presence of an obstacle, such as a person or an article, can be reliably detected in the lower part of the shutter 1, and safety when the shutter 1 is closed is ensured.

When the shutter 1 is lowered to the closed position, that is, when the sensing lever 21 at the lower end of the shutter 1 contacts the lower frame 48a, the sensing lever 21 of the shutter 1 contacts the obstacle in the same manner. While being rotated, the shielding body 33 is similarly rotated in conjunction with the sensing lever 21, and the reflecting surface of the reflecting plate 31 is shielded by the shielding plate 38 of the shielding body 33,
The detection light L emitted from the light emitter 44 is blocked and the control device
At 47, the operation of the electric motor M is stopped, and the lowering of the shutter 1 is stopped.

(Effects of the Invention) According to the present invention, in the opening / closing device that stops the lowering of the opening / closing body when the detection light for detecting the lowering of the opening / closing body is blocked when the lowering of the opening / closing body, the lower edge of the opening / closing body A horizontal reflector fixed to the section, a sensor rotatably supported vertically at the lower end of the opening and closing body, and interlocked with the sensor when the sensor rotates upward. And a rotatable shield that protrudes in an inclined state on the reflector and shields the detection light. It is possible to reliably shield the detection light projected toward the reflector by projecting the shield in an inclined state above the reflector with the moved sensor.

At this time, since the shield is projected on the reflector in an inclined state, even when the distance between the shield and the light receiver is short, such as when the sensor is pushed by the restricting portion at a high position, ,
The light reflected by the shield can be shielded without a risk of malfunction due to being received by the light receiver.

In addition, the reflector is fixed to the lower edge of the opening and closing body without rotating, and by shielding the reflector with a shield, the reflector is sufficiently rotated by the sitting body to detect the detection light. There is no danger of malfunction such as the opening / closing body continuing to move down in the event of an emergency when the opening / closing body comes into contact with an obstacle, as in the case where light is not received by the light receiver, and there is no need to rotate the reflector. There is no danger of failure such as damage to the body and the pivot point of the reflector.

In addition, the sensor that interlocks the shield at the lower end of the opening and closing body is rotatably supported in the up and down direction, so that the sensor is lowered by the restricting part at a position far away from the installation position of the reflector. However, the sensor pushed by the restricting portion is tilted without the reflector side being pushed up and turned, and is reliably turned upward around the support shaft without being bent,
The upper part of the reflector can be sufficiently shielded by the shield linked to the sensor.

Therefore, when the sensing body comes into contact with an obstacle such as a person or an article when the opening / closing body is lowered, it is detected and the drive of the electric motor for lowering the opening / closing body is controlled to reliably lower the opening / closing body. A switchgear that can be stopped, has high reliability, and can withstand long-term use can be provided.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view of an opening / closing device, FIG. 2 is a perspective view of the opening and closing part partially omitted, FIG. 3 is a front view of the same, FIG. FIG. 5 is a sectional view taken along the line a-b, FIG. 5 is a sectional view taken along the line b-b of FIG. 3, FIG. 6 is a sectional view of the same operating state, and FIG. 1 Opening / closing body, 21 Detector, 31 Reflector, 33 Shield, 43 Detector, 44 Floodlight, 45 Detector,
L: detection light, M: electric motor.

Claims (1)

(57) [Claims] An opening / closing body which is raised and lowered by driving of an electric motor, a horizontal reflector fixed to a lower edge of the opening / closing body, and is provided above the reflector and detected toward the reflector. A light emitter for projecting light and a light receiver for receiving detection light reflected by the reflector, and outputting a signal for stopping or reversing the drive of the motor to the motor when the detection light is blocked. A detecting device that is rotatably supported in a vertical direction at the lower end of the opening / closing body, and when the opening / closing body descends and comes into contact with a regulating portion located in a descending region of the opening / closing body, A sensor body whose downward movement is regulated and which is pushed upward and rotated upward, and which is interlocked with the sensor body when the sensor body rotates upward and projects in an inclined state on the reflector. A circuit that blocks the detection light projected toward this reflector Switchgear being characterized in that anda shield freely.