JP4791084B2 - Sheet shutter device - Google Patents

Description

The present invention relates to a sheet shutter device.

In a conventional sheet shutter such as a fireproof screen, the curtain weight (sheet weight + seat weight) increases as the opening width increases, and the winding shaft is bent due to the curtain weight and the weight of the winding shaft. . If the opening / closing operation is repeated while the winding shaft is bent, wrinkles are generated on the sheet.

One technique for preventing sheet wrinkling is to use a large diameter take-up shaft. Further, as described in Patent Document 1, a method of supporting the winding shaft from below with a large-diameter support roller has also been proposed. However, if a large-diameter winding shaft or a supporting roller is used, the size is increased accordingly. As the storage size increases, it becomes difficult to respond to the desire to save the ceiling storage space as much as possible.

In the fire protection screen device, an evacuation port is formed in the fireproof sheet that closes the opening, and the evacuation port is covered with a screen door. Here, a seat plate is attached to the lower end of the fireproof sheet. However, since the fireproof sheet is provided with an evacuation port, it is necessary to bear the seat plate load with a fireproof sheet having a smaller area. Therefore, if the evacuation port is provided near the end of the opening, the fireproof sheet may not be able to bear the seat plate load, and the position where the evacuation port is formed is limited. there were.
JP 2000-38885 A

An object of the present invention is to prevent the winding shaft from being bent without increasing the strength of the winding shaft or reinforcing the strength of the winding shaft using another member.

Another object of the present invention is to improve the degree of freedom of the position of an escape port formed in a fireproof sheet when the sheet shutter device is a fireproof screen device.

The sheet shutter device adopted by the present invention in order to achieve such a problem is:
A rotatable winding shaft provided above the opening;
A shutter curtain that can be wound around the take-up shaft by connecting the upper end of the seat to the take-up shaft.
A rotatable auxiliary shaft;
One or more cords that are connected to the auxiliary shaft at the upper end and connected to the seat plate at the lower end, and can be wound around the auxiliary shaft;
A transmission means for transmitting the rotation of the winding shaft to the auxiliary shaft;
Consists of
The shutter curtain closes the opening by falling under its own weight by releasing the rotation restriction of the winding shaft from the state wound on the winding shaft,
While the auxiliary shaft bears the load of the seat plate via the cable body, the winding shaft is rotated and the auxiliary shaft is rotated in conjunction with the rotation of the winding shaft so that the shutter curtain moves. It is comprised so that it may make it.
In the present invention, “the state where the load of the seat plate is borne by the auxiliary shaft via the cable body” includes not only the case where the load of the seat plate is borne by the auxiliary shaft but also the extent that the shutter curtain does not wrinkle. This includes the case where the shutter curtain bears the seat plate load to the extent that the winding shaft is allowed to bend.

To move the shutter curtain while the load on the seat plate is borne by the auxiliary shaft, in one aspect, the winding shaft is moved at the same speed so that the movement of the shutter curtain and the movement of the cable body are synchronized. And the auxiliary shaft may be rotated. The rotation of the winding shaft and the auxiliary shaft causes the rotation of the winding shaft and the rotation of the auxiliary shaft to rotate the winding shaft and the auxiliary shaft by one driving means. Therefore, in a preferred embodiment, the apparatus has a winding shaft driving means and a transmission means for transmitting the rotation of the winding shaft to the auxiliary shaft, and the transmission means transmits the shutter curtain and the cable body at the same speed. It has a speed transmission ratio that can be moved by. The same speed here may be the same speed as the shutter curtain moves with the load of the seat plate being borne by the auxiliary shaft. In addition, the present invention includes a case where the drive means is not provided (for example, manually opened and closed by its own weight drop). In this case, the transmission means rotates the winding shaft and the auxiliary shaft. It becomes only a transmission means between.

In the present invention, in a state where the load of the seat plate is borne by the auxiliary shaft via the cable body, the burden ratio by the auxiliary shaft decreases as the shutter curtain rises (the winding shaft is It may be configured so that all cases are paid). In this case, in one embodiment, the take-up shaft and the auxiliary shaft are rotated so that the shutter curtain rises faster than the cable body. In a specific configuration example, transmission means having a speed transmission ratio that rotates the take-up shaft and the auxiliary shaft is used so that the shutter curtain moves faster than the cable body. As a result, the winding shaft bears the seat plate load immediately before full opening, but the auxiliary shaft also bears the seat plate load during the upward movement before full opening (winding operation). Can be suppressed, and curling can be prevented from occurring.

The transmission means may be direct transmission or indirect transmission, and specifically includes a gear mechanism, a winding transmission mechanism (chain transmission, flat belt transmission, V belt transmission, belt transmission such as a toothed belt, rope transmission, etc. ) Is used as an example.

In the present specification, the “string” includes a belt in addition to a wire and a rope. In the case of a wire or a rope, it can be wound up without being laminated while being displaced on the peripheral surface of the auxiliary shaft. In the case of a belt, it is wound up so as to be laminated on the peripheral surface of the auxiliary shaft.

Preferably, a plurality of strips are provided at intervals in the width direction of the sheet. The striated body is provided by selecting a position so as to evenly bear the load of the seat plate. For example, when there are three or more striated bodies, it is provided so that the spacing between the striated bodies is equal, and when there is one striated body, the load at the central portion of the seat plate is taken up by the winding shaft Since the bending of the winding shaft can be suppressed without affecting the central portion of the sheet, it is provided at the center in the width direction of the sheet. Moreover, in a preferable aspect, the lower end of the cable body is connected to the seat plate via an adjustment screw, and the deflection of the seat plate can be corrected by the adjustment screw.

In the present invention, since the weight of the seat plate, which accounts for a large proportion of the shutter curtain weight, is borne by the auxiliary shaft, the winding shaft only has to bear the weight of the shaft itself and the seat, and the winding shaft is bent. Is prevented. According to the present invention, the diameter of the winding shaft can be reduced, the accommodation in the shutter case becomes compact, and the workability is improved by reducing the shaft diameter. Further, even when a winding shaft having a small diameter or a normal diameter is used in a sheet shutter installed in an opening portion having a large opening width, the winding shaft is prevented from being bent and is caused by the winding shaft being bent. No sheet wrinkling occurs.

In the present invention, since the weight of the seat plate that occupies a large proportion of the shutter curtain weight is borne by the auxiliary shaft, even if the seat plate load does not act on the shutter curtain itself, Compared with the extremely small force. Therefore, the escape port formed in the fireproof sheet of the fireproof screen device can be provided close to the end in the width direction of the fireproof sheet, and the degree of freedom of the installation location of the escape port position is increased.

In the case where the lower end of the cable body is connected to the seat plate via an adjustment screw, and the deflection of the seat plate can be corrected by the adjustment screw, the level of the seat plate is leveled particularly when the opening is fully opened. The aesthetic appearance is not impaired by the bending of the seat plate.

The present invention will be described on the basis of a fireproof screen which is one preferred form of a sheet shutter. 1 and 2 are schematic front views of a fire protection screen device according to the present invention. A shutter case 2 is installed above an opening defined by a fireproof screen (fireproof sheet) 1 of the fire protection screen device. A winding shaft 3 extending in the width direction of the opening is provided in the shutter case 2, and the upper end portion of the fireproof screen 1 is connected to the winding shaft 3. A seat plate 4 is attached to the lower end. An opening groove 20 extending in the width direction of the opening is formed on the lower surface of the shutter case 2, and front and rear lintels 21 and 22 are provided below the opening groove 20. A space formed between the lintels 21 and 22 is a movement path of the fireproof screen 1.

Normally, the fireproof screen 1 is wound around the take-up shaft 3 and stored in the shutter case 2, and the rotation restriction of the take-up shaft 3 is released by fire detection or smoke detection. With the help of the weight of the seat plate 4, the seat is lowered while being guided by guide rails 5 erected at both ends in the width direction of the opening to close the opening. The fireproof screen 1 is formed with an evacuation opening near the end in the width direction, and the evacuation opening is provided with a screen door 6. Can be done. By forming the evacuation port closer to the end, the width W of the fireproof screen 1 on the left side (in the drawing) of the evacuation port is reduced, but by providing the wire 10 at such a site, the wire 10 is loaded on the seat plate 4. The burden on the part is reduced.

An opening / closing machine 7 is provided in the vicinity of the winding shaft 3, and a sprocket 30 attached to the end of the winding shaft 3 and a sprocket 70 attached to the output shaft of the opening / closing machine 7 are connected by transmission with a chain 8. The take-up shaft 3 is rotated by the opening / closing machine 7, and the lowered fireproof screen 1 is taken up on the take-up shaft 3. In a normal electric seat shutter, both the raising and lowering of the seat may be performed electrically.

In the shutter case 2, an auxiliary shaft 9 extending in the width direction of the opening is provided in parallel with the winding shaft 3. The auxiliary shaft 9 has a smaller diameter than the winding shaft 3. The auxiliary shaft 9 is connected to the upper end of a wire 10 having a lower end connected to the seat plate 4. By rotating the auxiliary shaft 9, the wire 10 is wound around the auxiliary shaft 9, or the auxiliary shaft 9 is rotated. It comes out from 9.

In the present invention, the take-up shaft 3 and the auxiliary shaft 9 are rotated so as to raise the fireproof screen 1 while the auxiliary shaft 9 bears the load of the seat plate 4. To raise the shutter curtain while the auxiliary shaft 9 bears the load of the seat plate 4, the winding shaft 3 and the auxiliary shaft 9 are rotated so that the fireproof screen 1 and the wire 10 are raised at the same speed in synchronization. You can do it. By making the weight of the seat plate 4 bear with the wire 10, the load of the seat plate 4 does not act on the take-up shaft 3, and the take-up shaft 3 can be prevented from bending.

In a preferred embodiment, a plurality of wires 10 may be provided at equal intervals in the opening width direction, that is, in the width direction of the fireproof screen 1. In FIG. 1, the load of the seat plate 4 is borne by a total of three wires 10, one at the center in the width direction of the fireproof screen 1 and one at each of the portions close to both ends in the width direction. When only one wire 10 is provided, it is preferable to provide one wire at the central portion in the width direction of the fireproof screen 1 as shown in FIG. In the illustrated example, since the width W of the fireproof screen 1 on the left side (in the drawing) of the escape door provided with the screen door 6 is small, it is desirable not to bear the load of the seat plate 4. It is desirable to provide

An adjustment screw 11 is connected to the lower end side of the wire 10, and the lower end side of the wire 10 is connected to the surface portion 40 of the seat plate 4 using the adjustment screw 11. By finely adjusting the position of the seat plate 4 with the adjusting screw 11, the deflection of the seat plate 4 can be corrected.

In order to simplify the configuration of the apparatus and achieve good synchronization, transmission means for transmitting the rotation of the winding shaft 3 to the auxiliary shaft 9 is provided. The transmission means has a speed transmission ratio that moves the fireproof screen 1 and the wire 10 at the same speed. Moreover, in one aspect, a guide roller may be disposed that is positioned below the auxiliary shaft 9 or the take-up shaft 3 to change the moving direction of the rope (wire 10) or the sheet (fireproof screen 1). . Hereinafter, some embodiments of the transmission means will be described in detail.

Example 1 will be described with reference to FIGS. In the first embodiment, a gear mechanism is used as the transmission means, and the transmission means is fixed to the take-up shaft 3 and fixed to the auxiliary shaft 9 and the first gear 13 that rotates integrally with the take-up shaft 3. And the second gear 14 that rotates integrally with the auxiliary shaft 9. The first gear 13 and the second gear 14 move the shutter curtain (fireproof screen 1) and the cable body (wire 10) at the same speed. The first gear 13 and the second gear 14 are engaged with each other, and the winding shaft 3 and the auxiliary shaft 9 are rotated in synchronization with each other.

The longitudinal ends of the winding shaft 3 and the auxiliary shaft 9 are rotatably supported by the bracket 12, and the ends of the winding shaft 3 and the auxiliary shaft 9 further protrude from the bracket 12 and extend in parallel. Outward shaft portions 3 ′ and 9 ′ are formed. A first gear 13 is fixed to the shaft portion 3 ′ of the winding shaft 3, and a second gear 14 is fixed to the shaft portion 9 ′ of the auxiliary shaft 9, and the first gear 13 and the second gear 14 mesh with each other. The auxiliary shaft 9 is rotated in conjunction with the rotation of the take-up shaft 3.

That is, the winding shaft 3 is rotated by a chain drive by the opening / closing machine 7, and this rotation is applied to the auxiliary shaft 9 via the first gear 13 fixed to the winding shaft 3 and the second gear 14 fixed to the auxiliary shaft 9. Communicated. By adjusting the gear ratio (reduction ratio) to the ratio of the diameters of the winding shaft 3 and the auxiliary shaft 9, the fireproof screen 1 and the wire 10 can be wound up at the same speed. 3, the meshing position of the first gear 13 and the second gear 14 is substantially above the opening groove 20 of the shutter case 2, and the winding surfaces of the winding shaft 3 and the auxiliary shaft 9 are also The fireproof screen 1 and the wire 10 are both directly hung downward from the opening groove 20.

A second embodiment will be described with reference to FIG. In Example 2, a winding transmission mechanism is used as the transmission means. The transmission means includes a first sprocket 15 fixed to the winding shaft 3 and rotating integrally with the winding shaft 3, a second sprocket 16 fixed to the auxiliary shaft 9 and rotating integrally with the auxiliary shaft 9, and a first sprocket 16. A transmission member (chain 17) wound between the sprocket 15 and the second sprocket 16 is provided. The first sprocket 15 and the second sprocket 16 include a shutter curtain (fireproof screen 1), a cable body (wire 10), and The first sprocket 15 and the second sprocket 16 are interlocked and connected by a chain 17 to rotate the winding shaft 3 and the auxiliary shaft 9 synchronously. It is. In the embodiment of FIG. 5, the winding surfaces of the winding shaft 3 and the auxiliary shaft 9 are located substantially above the opening groove portion 20, and both the fireproof screen 1 and the wire 10 hang down directly from the opening groove portion 20. It is supposed to be.

A third embodiment will be described with reference to FIG. In the third embodiment, a winding transmission mechanism including a sprocket and a chain is used as the transmission means. The basic configuration is similar to that of the second embodiment, and the same reference numerals are used for the same members. It is attached. A first sprocket 15 is fixed to the end of the winding shaft 3, and a second sprocket 16 is fixed to the end of the auxiliary shaft 9. A chain 17 is interposed between the first sprocket 15 and the second sprocket 16. And the auxiliary shaft 9 is rotated in conjunction with the rotation of the winding shaft 3. In the aspect of FIG. 6, the winding surface of the winding shaft 3 is located substantially above the opening groove portion 20, but the winding surface of the auxiliary shaft 9 is located in a deep part spaced apart from the opening groove portion 20. ing. The guide roller 18 is disposed in the vicinity of the opening groove 20 so that the guide surface is positioned substantially above the opening groove 20, and the wire 10 that is wound around or fed out from the auxiliary shaft 9 is placed on the guide roller 18. It moves while being guided.

Example 4 will be described with reference to FIG. In the fourth embodiment, a winding transmission mechanism including a sprocket and a chain is used as a transmission means. The basic configuration is similar to that of the third embodiment, and the same members are denoted by the same reference numerals. It is attached. A first sprocket 15 is fixed to the end of the winding shaft 3, and a second sprocket 16 is fixed to the end of the auxiliary shaft 9. A chain 17 is interposed between the first sprocket 15 and the second sprocket 16. And the auxiliary shaft 9 is rotated in conjunction with the rotation of the winding shaft 3. In the embodiment of FIG. 7, the winding surface of the winding shaft 3 is located substantially above the opening groove portion 20, but the winding surface of the auxiliary shaft 9 is located in a deep part spaced apart from the opening groove portion 20. ing. The guide roller 18 is disposed in the vicinity of the opening groove 20 so that the guide surface is positioned substantially above the opening groove 20, and the wire 10 that is wound around or fed out from the auxiliary shaft 9 is placed on the guide roller 18. It moves while being guided.

The difference from the third embodiment is that, in the case of the third embodiment, the auxiliary shaft 9 is disposed in the back portion of the shutter case 2 on the lintel portion 21 side, and the guide roller 18 is a lintel portion of the opening groove portion 20. In the case of the fourth embodiment, the auxiliary shaft 9 is disposed in the recessed portion on the lintel portion 22 side in the shutter case 2, and the guide roller 18 is provided with the opening groove portion 20. It is that it is arrange | positioned at the lintel part 22 side.

The present invention can be used for sheet shutter devices in general, and is preferably used as a fire-proof screen winding mechanism of a fire-proof screen device.

It is the whole front view of the Example of the screen apparatus for fire prevention which concerns on this invention. It is the whole front view of the screen device for fire prevention which concerns on another Example. It is a longitudinal cross-sectional view of the screen device for fire prevention which concerns on this invention, Comprising: 1st Example of a interlocking means is shown. It is a partial top view which shows 1st Example of an interlocking means. It is a longitudinal cross-sectional view of the screen device for fire prevention which concerns on this invention, Comprising: 2nd Example of a interlocking means is shown. It is a longitudinal cross-sectional view of the screen apparatus for fire prevention which concerns on this invention, Comprising: 3rd Example of a interlocking means is shown. It is a longitudinal cross-sectional view of the screen device for fire prevention which concerns on this invention, Comprising: 4th Example of a interlocking means is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fireproof screen 3 Winding shaft 4 Seat plate 9 Auxiliary shaft 10 Wire 13 First gear 14 Second gear 15 First sprocket 16 Second sprocket 17 Transmission chain

Claims (5)

A rotatable winding shaft provided above the opening;
A shutter curtain that can be wound around the take-up shaft by connecting the upper end of the seat to the take-up shaft.
A rotatable auxiliary shaft;
One or more cords that are connected to the auxiliary shaft at the upper end and connected to the seat plate at the lower end, and can be wound around the auxiliary shaft;
A transmission means for transmitting the rotation of the winding shaft to the auxiliary shaft;
Consists of
The shutter curtain closes the opening by falling under its own weight by releasing the rotation restriction of the winding shaft from the state wound on the winding shaft,
While the auxiliary shaft bears the load of the seat plate via the cable body, the winding shaft is rotated and the auxiliary shaft is rotated in conjunction with the rotation of the winding shaft so that the shutter curtain moves. A sheet shutter device configured to be made. The sheet shutter device according to claim 1, wherein the shutter curtain and the cable body are configured to move at the same speed. 2. The load according to claim 1, wherein the load sharing ratio of the seat plate by the auxiliary shaft is reduced as the shutter curtain rises in a state in which the auxiliary shaft bears the load of the seat plate via the cable body. Sheet shutter device. The sheet shutter device according to claim 3, wherein the winding shaft and the auxiliary shaft are rotated so that the shutter curtain rises faster than the cable body. The sheet shutter device according to any one of claims 1 to 4, wherein a lower end of the cable body is connected to a seat plate via an adjustment screw, and the deflection of the seat plate can be corrected by the adjustment screw.

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