JP2899745B2 - Safety device for electric shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for preventing an accident in an electric shutter.

[0002]

2. Description of the Related Art Heretofore, this type is as follows. As shown in FIG. 10, the contact type sensor 9 is attached to the lower surface of the electric shutter 2.
When this contact type sensor hits an object, it is configured to stop power. As shown in FIG. 11, a photoelectric detector 10 such as a photoelectric sensor is mounted on both side walls of the electric shutter 2, and an object passing therethrough is detected to stop power.

[0003]

The above-mentioned prior art has the following problems. 1. The first type does not stop unless the contact-type sensor hits the object, which may damage and damage the object. 2. In the case of the second system, detection is usually performed using two to three sets of photoelectric detectors, but there is a range that cannot be detected depending on the object. 3. In any case, immediately before the door is completely closed, an object such as a toe of a foot, which has entered a slight gap between the electric shutter and the floor, cannot be detected. The present application has been made in view of such problems of the related art, and has as its object to provide the following. 1. While the electric shutter is descending, the electric shutter can be safely stopped without bringing an object into contact with the electric shutter main body by the photoelectric detector mounted on the lower surface of the electric shutter. 2. Until the electric shutter is completely closed, the photoelectric detector moves so that an object that has entered the gap between the lower surface of the electric shutter and the floor can be detected.

[0004]

Means for Solving the Problems In order to achieve the above object, the present invention is as follows. That is,
According to the present invention, the photoelectric detectors 3A and 3A mounted on the lower surface of the electric shutter 2 while the electric shutter 2 is descending.
A is supported by the photoelectric detector lifting and lowering devices 4 and 4, and photoelectric detection is performed.
The container lifting / lowering device 4 is provided with a spring box formed in a vertically long box shape.
4A and attached to the side of this spring case
Bracket 4B for mounting to shutter and spring
Sensor support rod 4C vertically penetrated through the case
And a flange 4C1 provided substantially at the center of the sensor support rod.
Acts downwardly located between the ceiling and the spring case
On the coil spring 4D and the lower end of the sensor support rod
The sensor bracket 4E is fixed to the
Detectors 3A, 3A are protected by sensor bracket
Supported in a state where it projects upward from the spring case.
At the upper end of the sensor support rod, wire 4F to the photoelectric detector
The supporting bracket 4G is attached, and the photoelectric detector is moved up and down.
The device 4 is provided with a bracket 4B for mounting to the shutter.
Shutter panel located at the lower end of the shutter 2B
This is a safety device for the electric shutter mounted on the indoor side of 2B1 . In this case, it can be configured as follows. A. Instead of the mechanism in which the photoelectric detectors 3A and 3A slide,
The parallel link mechanism 5 is used . B. A photoelectric detector supporting the photoelectric detectors 3A, 3A
The lowering devices 4, 4 are located at the lower end of the shutter 2B.
Is built in the monitor panel 2B1 . C. The photoelectric detector lifting devices 6 , 6 supporting the photoelectric detectors 3A, 3A are built in the shutter panel 2B1 located at the lower end of the shutter 2B, and the photoelectric detector lifting and lowering is performed.
The device 6 includes a spring case 6 formed in a vertically long box shape.
A and a vertical
Sensor support rod 6B and the lower end of the sensor support rod
A lift 6C that is mounted to be able to move up and down freely, and the lift
A carp that acts downward between the pulling case ceilings
From the spring 6D to the shutter panel
Sensor drawn out to the indoor side through the opened vertical groove 6E
It consists of a support leg 6F and a lower end of the sensor support leg.
Photoelectric detector 3A, and 3A is attached taken. D. A thin detection wire 7 instead of the photoelectric detectors 3A, 3A
And a limit switch 8 .

[0005]

Embodiments of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a safety device for the electric shutter according to the first invention, which comprises an electric shutter 2 and a safety device main body 3 attached to the electric shutter. A. The electric shutter 2 is a publicly known one, and includes rails 2A, 2A arranged on the left and right, and a shutter 2B that opens and closes by moving up and down between the rails. In the figure, 2B1, 2B1. . . Is a shutter panel that is flexibly connected. In the figure, 2C is a wire drum, 2D is a shutter opening / closing motor, and 2E is a controller. B. The safety device main body 3 is constituted by photoelectric detectors 3A, 3A such as a pair of left and right photoelectric sensors attached at positions near the left and right ends of the shutter panel 2B1 located at the lower end of the shutter 2B. a. In this case, a pair of left and right photoelectric detectors 3A, 3A is a shutter panel 2B located at the lower end of the shutter 2B.
1 is supported so as to be able to ascend and descend so as to protrude below the lower side 2B11, and the photoelectric detectors 3A, 3A are configured to face each other. b. Moreover, these photoelectric detectors 3A, 3A are provided with the lower side 2B1 of the shutter panel 2B1 located at the lower end of the shutter 2B while the lower surface of the photoelectric detector is loaded.
It is configured to rise to 1.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The photoelectric detectors 3A, 3A are supported by the following photoelectric detector lifting and lowering devices 4, 4. The photoelectric detector lifting / lowering device 4 is a spring case 4A formed in a vertically long box shape.
A bracket 4B for attaching to a shutter attached to a side surface of the spring case, a sensor support rod 4C vertically penetrated through the spring case, a flange 4C1 provided substantially in the middle of the sensor support rod, and a spring. It is composed of a coil spring 4D acting between the case ceiling and acting downward, and a sensor bracket 4E fixed to the lower end of the sensor support rod. The photoelectric detectors 3A, 3A are supported in a state protected by a sensor bracket. At the upper end of the sensor support rod protruding above the spring case, a bracket 4G for supporting a wiring 4F to the photoelectric detector is attached. The photoelectric detector lifting / lowering device 4 is mounted on the indoor side of a shutter panel 2B1 located at the lower end of the shutter 2B by a mounting bracket 4B for the shutter. As a result, A. When the pair of left and right photoelectric detectors 3A, 3A detects the presence of an object on the lower surface of the shutter while the shutter 2B is lowering, the lowering of the shutter can be stopped. B. While the electric shutter 2 is descending, a pair of photoelectric detectors 3A, 3A attached at positions near the left and right ends of the shutter panel 2B1 located at the lower end of the electric shutter do not allow an object to come into contact with the lower surface of the electric shutter. It is configured so that it can be stopped. C. While the electric shutter 2 is descending, a pair of photoelectric detectors 3 attached to the shutter panel 2B1 located at the lower end of the electric shutter at positions near the left and right ends via the photoelectric detector elevating devices 4 so as to be able to move up and down.
A and 3A are configured to detect an object that has entered the gap between the lower surface of the electric shutter and the floor surface until the electric shutter is completely closed. In addition to the above, it can be configured as follows. A. Referring to FIG. 5, a parallel link mechanism 5 can be used in a mechanism in which photoelectric detectors 3A and 3A slide. The parallel link mechanism 5 connects the photoelectric detector 3A to the supporting leg 5A.
The supporting leg is attached to the indoor side of the shutter panel 2B1 located at the lower end of the shutter 2B via a link 5B and a return spring 5C. 5D
Is a protective cover. B. Referring to FIG. 6, photoelectric detector lifting devices 4, 4 supporting photoelectric detectors 3A, 3A may be incorporated in shutter panel 2B1 located at the lower end of shutter 2B. C. Referring to FIG. 7, photoelectric detector lifting devices 6, 6 supporting photoelectric detectors 3A, 3A can be incorporated in shutter panel 2B1 located at the lower end of shutter 2B. The photoelectric detector lifting device 6 includes a vertically elongated spring case 6A, a sensor support rod 6B vertically penetrated through the spring case, and a lifting and lowering device mounted on the lower end of the sensor support rod so as to be able to move up and down. 6C, a downwardly acting coil spring 6D disposed between the lifter and the spring case ceiling, and a sensor support leg pulled out from the lifter to the indoor side through a vertical groove 6E formed in a shutter panel. 6F, and photoelectric detectors 3A, 3A are attached to the lower ends of the sensor support legs. D. Referring to FIG. 9, a thin detection wire 7 and a limit switch 8 can be configured instead of the photoelectric detectors 3A, 3A. 8A is a detection wire supporting hardware.

[0007]

Since the present invention is configured as described above, the following effects can be obtained. 1. FIG. 3 shows the lowered state of the electric shutter. In the state of the operation of closing the electric shutter, the operation always operates in a state in which a portion below the lower surface of the electric shutter can be detected.
That is, since the photoelectric detector protrudes from the lower surface of the electric shutter, an object can be detected and stopped before contacting the lower surface of the electric shutter. A. In the state of FIG. 3, if there is any object or the like on the floor under the electric shutter, the electric shutter advances to a position where the photoelectric detector can detect, and stops the electric shutter simultaneously with the detection. That is, since the moving distance of the electric shutter can be detected by the pair of photoelectric detectors, it is not necessary to increase the number of photoelectric detectors in anticipation of the height of the object. B. In the state of FIG. 3, since a fixed distance is maintained between the lower surface of the electric shutter and the photoelectric detector, the object can be stopped without bringing the lower surface of the electric shutter into contact with the object, so that the object may be damaged or the object may be pinched. Absent. 2. FIG. 4 shows a state in which the electric shutter is closed. In the closed state, the electric shutter descends while the photoelectric detector first hits the floor or compresses the spring in the spring case. That is, the photoelectric detector operates until the electric shutter is completely closed and stopped.
The photoelectric detector protruding from the lower surface of the electric shutter hits the floor and moves, while the lower surface of the electric shutter is the same height,
That is, the object can be detected up to the completely closed state. In this way, it is possible to detect objects entering the gap between the shutter lower surface and the floor surface until the electric shutter is securely closed,
It is possible to prevent the toe of the foot from being pinched by the electric shutter.

[Brief description of the drawings]

FIG. 1 is a perspective view.

FIG. 2 is a perspective view in which a part of a photoelectric detector is cut away.

FIG. 3 is a perspective view illustrating an operation.

FIG. 4 is a perspective view illustrating an operation.

FIG. 5 is a perspective view of another embodiment.

FIG. 6 is a perspective view of another embodiment.

FIG. 7 is a perspective view of another embodiment.

FIG. 8 is an enlarged sectional view taken along line AA.

FIG. 9 is a schematic front view of another embodiment.

FIG. 10 is a schematic front view of a conventional one.

FIG. 11 is a schematic front view of a conventional one.

[Explanation of symbols]

 1 Safety device for electric shutter 2 Electric shutter 3 Safety device body

Claims (5)

(57) [Claims] 1. A photoelectric detector (3A, 3A) attached to a lower surface of an electric shutter while the electric shutter (2) is moving down is supported by a photoelectric detector elevating device (4, 4).
The photoelectric detector lifting and lowering device (4) is configured in a vertically long box shape.
The formed spring case (4A) and this spring
Bra for attaching to the shutter attached to the side of the case
Up and down penetrating through the case (4B) and the spring case
Sensor support rod (4C)
(4C1) and spring cable
Coil spring acting between the ceilings
(4D), fixed to the lower end of the sensor support rod
Consisting of a sensor bracket (4E), a photoelectric detector
(3A, 3A) is protected by the sensor bracket
The sensor that is supported by
Wiring to the photoelectric detector at the upper end of the support rod (4F)
Bracket (4G) is installed to support
The lifting device (4) has a bracket for mounting to the shutter.
(4B) located at the lower end of the shutter (2B)
Installed on the indoor side of the shutter panel (2B1)
A safety device for an electric shutter. 2. A photoelectric detector (3A, 3A) slides.
2. A parallel link mechanism (5) is used in place of said mechanism.
Safety device in the described electric shutter. 3. The photodetector (3A, 3A) is supported.
Photoelectric detector lifting device (4, 4) is shutter (2B)
Built-in shutter panel (2B1) located at the bottom of the camera
Safety device in the electric shutter of claim 1 wherein being. 4. A shutter (2B) for moving a photoelectric detector lifting / lowering device (6, 6) supporting the photoelectric detector (3A, 3A ).
Built-in shutter panel (2B1) located at the bottom of the camera
At the same time, the photoelectric detector lifting and lowering device (6) is
And a spring case (6A)
Sensor support rod vertically penetrated into the case
(6B) and the lower end of the sensor support rod
The attached elevator (6C), this elevator and spring
A coil spring that acts downwards and is located between the case ceilings
(6D) and a shutter panel opened from the elevator
Drawn out to the indoor side through the vertical groove (6E)
And a lower end of the sensor support leg.
Photoelectric detector (3A, 3A) safety device in the electric shutter mounted have that claim 1 is in. 5. A thin type instead of the photoelectric detector (3A, 3A)
It consists of a detection wire (7) and a limit switch (8).
The safety device for an electric shutter according to any one of claims 1 to 4, which can be used.