JPH0741838Y2 - Seat switch structure of electric shutter for building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a seat switch structure of an electric shutter for a building that detects an obstacle when the shutter curtain descends.

[Problems to be solved by the prior art and device] Today, a seat plate switch is provided at the lowermost end of a shutter curtain so that an obstacle such as a person or an object touches the seat plate during descent so that an emergency stop can be made. The ones that are used are often used. A tape switch may be used as such an obstacle detection switch, but even the tape switch itself is expensive and even if the obstacle slightly contacts the seat plate in the thickness direction. In order to detect even this, it is necessary to lay the tape switch on the bottom surface of the seat plate completely, but such a thing cannot be practically done.

On the other hand, the obstacle detection switch is a micro switch type that is inexpensive and has high versatility, and the detection switch is provided on the seat plate body and activated by the detection operation unit that moves up when the obstacle touches. There are things I tried to let you do.

However, in such a configuration, the detection switch is provided in the front-rear center portion of the seat plate body, and therefore, when the detection operation part is lifted in the front-rear inclination by the obstacle, Only half of the lifted amount works, and as a result, there is a drawback that the detection switch is not activated and / or even if it is activated, there is a time loss and the emergency stop timing is delayed. ing.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was devised with the object of providing a seat plate switch structure of an electric shutter for a building that can eliminate these drawbacks. In a building electric shutter provided with a seat plate provided with an obstacle detection switch at the lowermost end of the shutter curtain, the seat plate is connected to the shutter curtain,
Also, a seat plate body in which the detection switch, which detects the pressing of the switch piece, is integrally fixed at a substantially central position in the thickness direction,
Extend longer in the thickness direction than the seat plate body,
It is formed by using a detection actuating body that is locked to the lower part of the front and rear side surface parts in the thickness direction of the seat plate body while hanging by its own weight and is pushed up by the contact of an obstacle. Is characterized in that an auxiliary member projecting forward and backward in the thickness direction, and both front and rear end portions of the auxiliary member closely facing the upper surface of the detection actuating body are provided.

Further, according to the present invention, even if the detection actuating portion is lifted up in the front-back slanting shape, this structure promptly detects it and improves the safety.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a shutter to be installed in an opening, and a shutter curtain 2 constituting the shutter 1 is wound around a winding drum 3 provided at the upper portion of the opening and guided by left and right guide rails 4. All of them are open and closed as usual.

A seat plate 5 is provided at the lowermost end of the shutter curtain 2, and the seat plate 5 is provided at a seat plate body 6 connected to the shutter curtain 2 and at a lower end portion of the seat plate body 6. And a detection actuating unit 7 that is used. That is, the seat plate body 6 is in the shape of a groove with the lower half lower surface opened, and is composed of a micro switch through the bracket 8 inside, and the pressing of the switch piece 9a is set to act as an obstacle detection operation. The detection switch 9 is attached to a substantially central portion in the front-rear thickness direction.

On the other hand, the detection operating portion 7 is provided with a projecting piece 7a which is loosely fitted in the lower opening of the seat plate body 6, and the seat plate body 6 is provided at the upper end of the projecting piece 7a.
Locking claws 7b for locking locking pieces 6a formed respectively on the lower edges of the openings on the front and rear side surfaces in the thickness direction. Further, the front-back width (width) of the detection operating portion 7 is larger in the front-back direction in the thickness direction than that of the seat plate body 1, and the detection operating portion 7 contacts a magsa (not shown) formed at the curtain swallow of the shutter case. A wide ground contact side 7c is formed to prevent the seat plate 5 from being swallowed in the case. A guide 11 for fixing the rubber cushion 10 is attached to the bottom surface of the ground contact side 7c. A pair of front and rear is provided. The auxiliary rod 9b provided on the upper edge of the guide 11 on the switch piece 9a of the detection switch 9 so as to project in the front-back direction in the thickness direction is arranged in close proximity to each other so that both front and rear ends thereof come into contact with each other. Has been done.

Further, 12 is a drive motor for opening and closing the shutter curtain.

In the embodiment of the present invention constructed as described above, the opening and closing of the opening is performed by winding and unwinding the shutter curtain 2 on the winding drum 3. When the detection operation unit 7 is lifted up due to an obstacle during the lowering operation, the detection switch 9 detects this and stops the lowering of the shutter curtain 2 urgently.

In the case where the present invention is implemented in this way, the descent of the shutter curtain 2 will be stopped urgently by the obstacle detection. In this emergency stop, an obstacle hits one of the front and rear sides of the ground contact side 7c. Therefore, even if the front and rear are inclined, the obstacle can be detected quickly and surely. In other words, the switch piece 9a of the detection switch 9 has a long auxiliary rod in the front-rear direction.
The front and rear end portions of 9b are provided so as to closely oppose each other in the thickness direction of the grounding piece 7c, and when the detection operating portion 7 is pushed up in the front-back tilting manner, the grounding piece on the pushed up side.
7c comes into contact with the auxiliary rod 9b and pushes it up together with the switch piece 9a to perform a detection operation.
Even with one detection switch 9, there is no detection delay or non-detection, and quick and accurate detection is achieved. As a result, the reliability of obstacle detection is significantly improved and the safety can be improved.

Moreover, in the obstacle detection, the detection actuating body 7 itself extending longer in the thickness direction than the seat plate body 3 is lifted up by the obstacle, and the detection switch 9 is small and versatile like a micro switch. Even if it is an obstacle that pushes the seat plate 5 slightly and the detection actuating body 7 pushes up in the front-back direction in a slanting shape, it can be detected quickly and surely. As in the case of using it, it is not necessary to lay it all over the bottom surface, which greatly contributes to simplification of the structure, cost reduction and improvement of detection accuracy.

In addition, since the guide 11 for fixing the buffering agent 10 also serves as the one for pushing up the auxiliary rod 9b, the structure can be simplified. In addition, since the obstacle can be reliably detected by a small upward movement of the detection operating portion 7, there is also an advantage that the operating portion 7 can be formed as a long integral body over the entire length of the seat plate width.

[Effects] In summary, since the present invention is configured as described above, when the shutter curtain descends, an obstacle comes into contact with the detection actuator and pushes it up to activate the detection switch. Although the object detection is performed, when the detection actuating body is pushed up in a front-back slanted shape by contact with an obstacle on one of the front and rear edges, an auxiliary member protruding forward and backward provided on the switch piece is used. The detection actuator is immediately pushed up by the pushed up side to detect an obstacle, and thus the push-up stroke of the switch piece is insufficient as in the conventional case, which may result in non-detection or delay in detection. Obstacles can be detected swiftly and reliably without any problems, and safety can be significantly improved.

Moreover, since the detection of the obstacle is performed by the detection actuating body itself, which extends longer in the thickness direction than the seat plate main body, abuts against the obstacle and is pushed up, the detection switch is
While using a small and highly versatile object such as a micro switch, even if it is an obstacle that pushes the detection actuator forward and backward with a small amount of bite into the seat plate, this can be done quickly and reliably. It is possible to detect, and it is not necessary to lay the entire bottom surface of the seat plate to deal with various obstacles as in the case of using a tape switch, which simplifies the structure and reduces the cost. , It can greatly contribute to the improvement of safety and detection accuracy.

[Brief description of drawings]

1 is a schematic front view of a building shutter according to the present invention, FIG. 1 is a schematic front view of the building shutter, and FIG. FIG. 3 is an operation explanatory view. In the figure, 5 is a seat plate, 6 is a seat plate main body, 7 is a detection operation part, 7c is a ground side, 9 is a detection switch, 9a is a switch piece, and 9b is an auxiliary rod.

Claims (1)

[Scope of utility model registration request] 1. An electric shutter for a building comprising a seat plate provided with an obstacle detection switch at the lowermost end of the shutter curtain, wherein the seat plate is connected to the shutter curtain and the switch piece is pressed. A seat plate main body to which a detection switch for detecting operation is integrally fixed at a substantially central position in the thickness direction, and a seat plate main body that extends longer in the thickness direction front and rear than the seat plate main body in the thickness direction front and rear. It is formed by using the detection actuating body that is locked to the lower part of both side parts in the state of hanging by its own weight and pushed up by the contact of an obstacle. A seat plate switch structure for an electric shutter for a building, characterized in that an auxiliary member is provided so as to project and have its front and rear ends closely opposed to the upper surface of the detection actuator.