JP2571725Y2 - Shutter safety device - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a shutter that automatically moves up and down by a structure in which slats are vertically connected in a daisy chain, allowing relative vertical movement and bending rotation. It concerns safety devices.

[Conventional technology]

Such shutters have also been used as residential shutters recently because they also have ventilation and lighting functions in addition to the original shutter functions of disaster prevention and crime prevention, but if they are opened and closed by remote control as home automation, It is dangerous to pull out the slat when there is an obstacle below the bottom slat.
It is usual to provide some kind of obstacle detection mechanism (safety device) such as detecting such a situation and stopping the extension of the slat.

[Problems to be solved by the invention]

Regarding this safety device, the inventor of the present invention has previously proposed an inexpensive and reliable device consisting of a striker and a tape switch.
−83308, but in this proposal,
The striker operates as long as the upper and lower slats reduce the relative distance, so when the shutter is released,
He did not discuss in detail what happens when the bottom slat descends normally (again, the bottom slat contacts the drain plate at the lower end and the distance between the slats is reduced). It is conceivable that the tape switch is accurately mounted at a position where it does not operate even if the striker protrudes. However, this requires skill and requires a malfunction, resulting in malfunction due to improper installation. . In addition, even if mounting can be performed with high accuracy, the position is restricted by caulking the groove holding the tape switch, and in addition, the material of the tape switch cannot be firmly fixed because it is made of rubber or the like. In some cases, the tape switch was misaligned depending on the number of contacts between the striker and the tape switch (the frequency of operation of the safety device).

The present invention is intended to solve such a problem and, in essence, aims to implement a safety device that functions reliably with a simple structure.

[Means for solving the problem]

Under the above-mentioned problems, this invention is provided between the upper and lower slats when the lower slats of the slats that can be moved up and down by being linked in a rosary are restricted from lowering and reduce the distance from the upper slats. A safety device for a shutter that protrudes from an up-and-down path and presses a tape switch provided in a strip along this up-and-down path to detect an obstacle under the bottom slat. In order to place the tape switch in a position that will be activated until the lower end of the bottom slat touches the drainer, and will not be activated by the striker protruding due to the subsequent lowering of the upper slat.
A safety device for a shutter, comprising a tape switch positioning / fixing mechanism provided with a spacer or the like between a tape switch and a drainer.

In addition, when the lower slats of the slats connected in a daisy chain and capable of elevating are restricted in descending to reduce the distance from the upper slats, the striker provided between the upper and lower slats raises and lowers. When the bottom slat is lowered normally in the safety device of the shutter that protrudes from the path and detects an obstacle existing below the bottom slat by pressing the tape switch provided in a belt shape along this elevating path, There is also provided a shutter safety device provided with a tape switch contact prevention mechanism for preventing the tape switch from responding to the protrusion.

[Action]

When the bottom slat descends normally, the bottom slat comes into contact with the draining board and the descent is regulated, and the interval between the slats is reduced. As a result, the striker protrudes, but a tape switch positioning / fixing mechanism and a contact prevention mechanism that does not make the tape switch insensitive are provided at that location. I will not take it. Further, the position of the tape switch does not shift.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 9 is a cross-sectional view of the shutter. The shutter is composed of a slat 4 having a substantially a hook-shaped body 2 at an upper portion and a substantially rectangular receiver 3 at a lower portion with a middle body 1 interposed therebetween. The hook body 2 and the receiving body 3 of each of the slats 4 are fitted to each other so as to be able to move up and down, bend and rotate, and are connected in a rosary. The connection of the slats 4 is wound around a drum or the like installed on the outside upper portion of the sash or the like where the slat 4 is attached, and the drum is rotated in the normal or reverse direction by a motor or the like to raise and lower the shutter. At the lower end of the bottom slat 4a at the bottom, an airtight material 6, such as mohair, is provided in airtight contact with the draining plate 5 or the like.

By the way, in this configuration, if each hook body 2 is hung from the receiver 3, such as when the shutter is descending, the slit 7 formed in the neck of the hook body 2 is exposed, and the light or the wind is passed therethrough. Becomes On the other hand, if the hook body 2 enters the receiver 3 when the bottom slat 4a hits the draining plate 5 or the like, the slit 7 is hidden in the receiver 3 and does not allow light or wind to pass through. At the same time, each of the slats 4 has a structure like a very rigid single piece in which the trunks 1 are attached to each other.

FIGS. 1 and 2 are sectional side views when a safety device capable of detecting an obstacle is attached to the shutter, FIG. 3 is a front view, and FIG. 4 is a cross-sectional plan view. Is the direction in which the slat 4 is moved up and down around the pin 8 on one of the two slats 4 in a vertical relationship (in this example, this is set as the bottom slat 4a so that an obstacle can be detected over the entire vertical range of the slat 4). A striker 9 that can rotate in a direction perpendicular to this (in this example, forward) and a link 11 that can also rotate forward around a pin 10 on the other side (the slat 4 immediately above the bottom slat 4a). The striker 9 and the link 11 are attached via a striker holder 12 and a link holder 13, respectively, and the striker 9 and the link 11 are pivotally connected by pins 14. In addition, two sets of this safety device consisting of striker 9 and link 11 are prepared, and each holder 12, 13 is inserted into the hollow part formed at both ends of bottom slat 4a and fixed with rivets or screws 15. Normally, one set may be provided on one side. On the other hand, slat 4
Is extended from the sash through a vertical frame 16 by a certain length, and its end is surrounded by a guide rail 17 extending vertically in parallel with the entire vertical range. In order to prevent dust from entering the opening of the guide rail 17 into which the slat 4 enters, and to prevent rattling of the slat 4 in the front-rear direction,
An airtight material 18 is provided on the front and back of the slat 4 for light contact.

With the above configuration, when the shutter is lowered (in this case, the hook 2 of each slat 4 is suspended from the receiver 3 by its own weight), the bottom slat 4a and the slat 4 thereon are separated. Therefore, the striker 9 and the link 11 are hardly rotated. However, if there is any obstacle under the bottom slat 4a and the lowering of the bottom slat 4a is hindered, the upper slat 4 descends and the two approach, and the interval between the pins 10 and 8 is reduced. As a result, the link 11 and the striker 9 lose their length, and the pin 14 bends to a fulcrum (eccentric fulcrum), whereby the striker 9 and the link 11 also rotate, and the striker 9 bends forward. Will protrude greatly.
At this time, if a tape switch 19 is provided vertically on the inner surface of the guide rail 17 on the projecting side, the striker 9 presses the tape switch 19 to operate it. The tape switch 19 may be formed by forming a fitting groove 20 on the inner surface of the guide rail 17 and fitting the groove into the groove from above. Here, the tape switch 19 has a working portion 19a consisting of a strip-shaped bulging portion on the working surface, and has a two-pole thin metal plate 19b, 19c in the longitudinal direction of the inside, which is made of an insulating material such as vinyl or resin. This is a band-shaped switch body enclosed in an insulated floating state so that they do not come into contact with each other unless an external force is applied inside 19d. A switch that turns on and off an electrical signal when a predetermined pressure is applied at any position in the longitudinal direction. That is. FIG. 6 is a cross-sectional view showing the pressed state of the tape switch 19 by the striker 9. A groove forming portion is also provided on the striker 9 side of the fitting groove 20 for mounting the tape switch 19, and this is used as a stopper portion 20a. Then, the action portion 19a of the tape switch 19 is viewed from the gap of the stopper portion 20a. Thus, when the striker 9 protrudes, the protrusion is further restricted by hitting the stopper portion 20a, so that the tape switch 19 is not pressed more than necessary, which is preferable for protection of the tape switch 19. In addition,
When the tape switch 19 is actuated, the shutter is stopped on the spot or an appropriate avoidance operation such as re-elevation for a certain time is performed by the ON / OFF signal.

By the way, according to the above configuration, even when the bottom slat 4a descends normally, when the bottom slat 4a hits the draining plate 5, the lowering is regulated, so that the striker 9 is projected and the tape switch 19 is pressed. Therefore, if this is not properly selected, an avoidance operation is performed in this case as well, and the original function of the shutter cannot be performed. In this selection, the position of the striker 9 and the like are detected, and depending on the position, there are electric means that does not accept the ON / OFF signal of the tape switch 19 and mechanical means that makes the striker 10 inoperative. The following measures are taken. That is, when the bottom slat 4a descends normally, the tape switch 19 in which the striker 9 exists is provided.
Is provided with a dead structure which is insensitive to the operation of the striker 9.

As a first specific example of the blind structure, the tape switch 19 must not be activated (it may be partial,
Here, a fixed length above the draining plate 5 is set.) A spacer 21 is inserted into the fitting groove 20 and a positioning and fixing mechanism of the tape switch 19 for preventing the tape switch 19 from being lowered therefrom is provided. Possible (Fig. 2, 5
Figure). The spacer 21 may be joined to the tape switch 19 in advance. According to this, there is an advantage that it is not necessary to modify the guide groove 20 or the like only by manufacturing the spacer 21, and the length of the tape switch 19 may be short.
In addition, in the positioning and fixing mechanism, the width of the groove of the fitting groove 20 is narrowed by caulking or the like so that the tape switch 19 must not be operated.
There is also a method to prevent the fall (Fig. 7). According to this, there is an advantage that the spacer 21 and the like are not required.
As a second specific example of the insensitive structure, it is conceivable to provide a rigid cover 22 covering the surface of the tape switch 19 over a length in which the tape switch 19 must not be operated, and to provide a contact preventing mechanism for the tape switch 19. (FIG. 8). According to these, it is not necessary to modify the length of the tape switch 19 and the like.

In the above description, the tape switch 19 is provided on the front (rear) surface of the slat 4 and the striker 9 is projected forward (rear). And the striker 9 may be made to protrude in this direction.

[Effect of the invention]

As described above, the present invention is directed to a positioning and fixing mechanism and a tape for preventing the tape switch 19 from being present in this portion with respect to the protrusion of the striker 9 when the bottom slat 4a is normally lowered, in which the tape switch 19 must not operate. Since the switch 19 is provided with a contact prevention mechanism that does not activate the switch even when it is present, a specific position is detected, and the tape switch 19 does not receive a signal or the striker 9 does not operate. Does not require complicated means.
That is, a safety device for a shutter that can function reliably by simple and inexpensive means has been realized.

[Brief description of the drawings]

1 and 2 are sectional side views of the safety device according to the present invention, FIG. 3 is a front view, FIG. 4 is a sectional plan view, FIG. 5 is a front view of a main part, and FIG. FIG. 7 is a front view of an essential part of another embodiment, FIG. 8 is a sectional plan view of an essential part of another embodiment, and FIG. 9 is a sectional side view of a shutter. (Sign) 4 Slat 4a Bottom slat 5 Drain plate 9 Striker 19 Tape switch 21 Spacer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shigemitsu Fujiwara 2-7-1, Ima, Okayama-shi, Okayama Om Equipment Co., Ltd. Okayama Headquarters (56) References Hikaru 2-129599 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] When the lower slats (4) of the slats (4) connected in a rosary connection and capable of moving up and down are restricted from lowering to reduce the distance from the upper slats (4), the upper and lower slats (4) are moved downward. 4) A striker (9) provided between the protrusions protrudes from the elevating path, and presses a tape switch (19) provided in a belt shape along the elevating path to detect an obstacle present below the bottom slat (4a). A safety device for a shutter that operates until the lower end of the bottom slat (4a) contacts the drain plate (5) in the continuous movement of closing the shutter, and then the striker by lowering the upper slat (4). In order to install the tape switch (19) in a place where it does not operate due to the protrusion of (9), a spacer (21) is arranged between the tape switch (19) and the drain plate (5). Tape switch that (1
9) A safety device for a shutter, comprising the positioning and fixing mechanism of (9). 2. When the lower slats (4) of the slats (4) connected in a daisy chain and capable of moving up and down are restricted from lowering to reduce the distance from the upper slats (4), the upper and lower slats (4) are moved downward. 4) A striker (9) provided between the protrusions protrudes from the elevating path, and presses a tape switch (19) provided in a belt shape along the elevating path to detect an obstacle present below the bottom slat (4a). When the bottom slat (4a) is lowered to the normal position, the tape switch (19) does not respond to the striker (9) when the bottom slat (4a) is normally lowered. A safety device for a shutter, which is provided.