JP2530613Y2 - Safety device for electric shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a safety device for an electric shutter to be built at an opening of a building or the like.

[Problems to be Solved by the Related Art and the Invention] Conventionally, in this type of electric shutter, if an obstruction is present in the opening when the shutter curtain descends, the shutter may be pinched. For example, an obstacle detection switch such as a tape switch is provided on the seat plate at the lowermost end of the shutter curtain, and a safety device is provided to stop the driving of the motor when an obstacle comes into contact with the seat plate. Some are being done.

However, in this case, the obstacle detection switch cannot discriminate that the seat plate has touched the obstacle and that the seat plate has touched the floor (or the ground), and therefore the seat plate has Shortly before grounding, the limit switch is activated to turn off the safety device, so that the motor does not stop immediately when the seat plate is grounded.

However, in this case, in the range where the safety device is switched to the OFF state, obstacle detection cannot be performed, and as a result, the seat plate is distorted by sandwiching small stones or the like with the floor surface. In addition to inconveniences such as stoppage in the state, the obstacle detection switch is switched on and off every time the shutter curtain is opened and closed, causing a problem in durability of the switch.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned circumstances, and has been created with the object of providing a safety device for an electric shutter capable of eliminating these disadvantages. A seat plate movably connected to the lowermost end of a shutter curtain to be constituted, and an obstacle detection switch for detecting that the seat plate moves upward relative to the shutter curtain as abutting on an obstacle; And a regulating member whose upper end is supported by a slide immediately above the seat plate, and whose lower end is grounded to the floor together with the naturally suspended seat plate, and the vertical movement range of the seat plate is set within the height of the regulating member. It is characterized by having been done.

According to the present invention, an obstacle can be detected until the seat plate comes into contact with the floor surface.

Next, an embodiment of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a shutter curtain of an electric shutter provided for opening and closing an opening of a building, and the shutter curtain 1 has a motor (switch) 3 based on a drive command from a control unit 2. The shutter curtain 1 moves up and down while being guided by the guide rails 4 by the forward and reverse driving. In the shutter curtain 1, each of the slats 1a and the seat plate 5 at the lowermost end of the curtain are vertically moved at a predetermined interval. When the seat plate 5 is just in contact with the floor surface, the slats 1a are in a half-open state with a gap between them, and the shutter curtain 1 is pulled out. The configuration in which the gaps are gradually closed from the lower side due to the contact between the slats 1a and the like is a conventional configuration.

At both ends of the seat plate 5, brackets 6 are integrally provided. On the bracket 6, a regulating member 8 urged upward by an ammunition 7 is provided to be vertically movable. Have been. The restriction member 8 is immovable with respect to the shutter curtain 1 by being supported by the lower end edge of the lowermost end slat 1a connected so that the seat plate 5 moves relatively up and down. It is configured as follows. When the shutter curtain 1 descends, the regulating member 8
The lower end of the shutter curtain together with the substantially seat plate 5 contacts the floor surface, and is sandwiched between the floor surface and the slat 1a immediately above the seat plate.
In this state, the grounded seat plate 5 restricts the upward movement relative to the shutter curtain 1.

Reference numeral 9 denotes an obstacle switch provided on the seat plate 5, and the obstacle detection switch 9 is provided so as to face a protruding piece 8 a provided on the regulating member 8. The obstacle detection switch 9 is separated from the protruding piece 8a in a state where the seat plate 5 is suspended by its own weight against the shutter curtain 1 (the urging force of the elastic machine 7 also acts in the embodiment). When the seat plate 5 comes into contact with an obstacle and is lifted relatively to the shutter curtain 1, the seat plate 5 comes into contact with the stationary piece 8a and switches, thereby detecting the obstacle. Have been.

In the embodiment of the present invention configured as described above, when the seat plate 5 comes into contact with an obstacle in the process of lowering the shutter curtain 1 and moves relatively upward with respect to the shutter curtain 1, the above-described case is assumed. As described above, the obstacle detection switch 9 is moved up and comes into contact with the stationary member 8 to detect the obstacle, and a safety device such as an emergency stop of the motor 2 is provided.

In the embodiment of the present invention, the obstacle detection switch 9 can surely detect an obstacle. However, when the seat plate 5 is safely grounded without touching the obstacle. At about the same time, the regulating member 8 comes into contact with the ground and is sandwiched between the floor surface and the slat 1a immediately above the seat plate. As a result, the grounded seat plate 5 does not move up relative to the shutter curtain 1 due to the further extension operation of the shutter curtain 1, and the seat plate 5 does not move.
The distance between the upper slat 1a and the upper slat 1a
That is, the obstacle detection switch 9 and the protruding piece 8a are maintained in a separated state. Therefore, there is no need to switch the safety device to the OFF state just before the seat plate touches the ground, as in the prior art, and the safety device is used during all the descending strokes until the seat plate 5 touches the ground. It is possible to detect an obstacle by operating it effectively, and there is no problem such as pinching a pebble. In addition, the number of times of switching ON / OFF of the obstacle detection switch 9 is reduced and durability is improved.

And in this case, the self-weight of the shutter curtain 1 is
When the regulating member 8 interposed between the slant 1a immediately above the seat plate and the floor functions as a beam and can be received on the floor,
Shutter curtain 1 for obstacle detection members including seat plate 5
As a result, it is not necessary to make the obstacle detecting member excellent in strength so as to withstand the own weight of the shutter curtain 1, so that the structure can be made simple and compact and accurate. Can be excellent.

In addition, since the obstacle detection switch 9 and the restricting body 8 are disposed on both left and right ends of the seat plate 5 and are assembled so as to be hidden in the guide rail 4, there is little malfunction and mischief. Therefore, the reliability can be improved.

[Effects] In summary, the present invention is configured as described above. Therefore, when the shutter curtain is lowered,
When the seat plate comes into contact with the obstacle and is lifted, the obstacle detection switch detects the obstacle, but when the seat plate is grounded on the floor, the seat plate is substantially simultaneously As a result, the upward movement relative to the shutter curtain is restricted, the natural state is maintained, and the obstacle detection switch remains in the non-detection state. As a result, the obstacle detection is performed until the seat plate comes into contact with the ground, and it is not necessary to invalidate the obstacle detection at a position slightly before the fully closed state as in the related art.

Moreover, in this case, the weight of the shutter curtain is limited by the fact that the regulating member interposed between the slat immediately above the seat plate and the floor surface functions as a beam and is received on the floor surface. The self-weight of the shutter curtain does not act on the obstacle detecting member including the shutter, and as a result, it is not necessary to make the obstacle detecting member excellent in strength so as to withstand the self-weight of the shutter curtain, It can be made simple and compact, and it can be excellent in accuracy.

[Brief description of the drawings]

The drawings show an embodiment of the safety device of the electric shutter according to the present invention. FIG. 1 is a partially schematic perspective view of the electric shutter, and FIGS. is there. In the figure, 1 is a shutter curtain, 2 is a control unit, 5 is a seat plate, 8 is a regulating member, and 9 is an obstacle detection switch.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsushi Mori 2-1-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Sanwa Shutter Industry Co., Ltd.

Claims (1)

(57) [Scope of request for utility model registration] 1. A seat plate, which is connected to the lowermost end of a shutter curtain constituting an electric shutter so as to be movable up and down, and contacts an obstacle to move the seat plate relatively upward with respect to the shutter curtain. An obstacle detection switch for detecting
An upper end is supported by a slat immediately above the seat plate, and a lower end is provided with a naturally hanging state of the seat plate and a height-regulating member that is in contact with the floor surface, and the vertical movement range of the seat plate is within the height of the regulating member. An electric shutter safety device characterized by being set.