JPH0325810Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a smoke prevention device in which a sheet body descends from the ceiling and partitions the ceiling into predetermined sections in order to prevent the spread of smoke generated in the event of a fire, etc. This relates to the guide rail structure of the screen.

[Problems to be solved by the prior art and the invention]

Today, building standards require that buildings and other structures with a certain ceiling area must have some kind of smoke prevention measures in place to prevent smoke from spreading through the ceiling in the event of an emergency such as a fire. It is also stipulated by law. Among these smoke prevention measures, a sheet body is automatically lowered from the ceiling under the guidance of a guide rail in response to a command from a sensor such as a smoke detector, and the ceiling is partitioned into smoke prevention sections of a predetermined area. A so-called smoke screen is known. In this case, when dividing by using a plurality of sheets in a connected manner,
The guide rail (middle pillar) provided at the connection part is normally housed in the ceiling, but it is desired that it hang down as the sheet body descends when smoke is detected. We have developed a technology as shown in Publication No. 57709 and have already had a number of implementation results. However, in this case, a central pillar with a notch at the bottom through which the seat board passes is pivoted to the ceiling so that it can be swung horizontally within the ceiling, and the seat body is guided. Since it is configured to be able to change its appearance into a hanging posture, when a plurality of sheet bodies are arranged in a meandering manner, the above-mentioned notch will be exposed, and as a result, the ceiling surface will be exposed. The smoke that had been spreading in a creeping manner leaked out from this notch, so further improvements were needed.

[Means to solve the problem]

In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a guide rail structure for a smoke screen that can eliminate these drawbacks. , a guide rail for a smoke screen that can be transformed into a hanging position for guiding a sheet body, the guide rail being configured to be expandable and retractable using a plurality of rail pieces that are fitted in sequence so as to be slidable in the vertical direction. A guide path for the seat body is formed at the side edge of each rail piece, and a seat plate portion at the lower edge of the seat body is integrally connected to the lowest rail piece, so that the seat plate follows the descent of the seat body. This is characterized in that the guide rail is configured to extend in a hanging position.

With this configuration, the present invention is a guide rail that can be stored in the ceiling at all times and can be hung down in conjunction with the lowering of the seat body, while eliminating the cutout and ensuring smoke leakage. This is something that can be prevented.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a case body formed into a substantially L-shape in plan view and installed in a ceiling 2, and each side of the L-shape of the case body 1 is provided with a winding drum for winding the sheet body 3. A bevel gear (not shown) is fixed to each of the spindles 4a of these winding drums 4, and when these bevel gears mesh with each other, both winding drums 4 rotate synchronously. It's becoming like that. When the brake is released in response to detection by a smoke detector (not shown), both winding drums 4 rotate synchronously, and the two sheet bodies 3
It is designed to cause the two to descend at the same speed.

5 is the central pillar on which the present invention was implemented,
The middle pillar 5 is composed of a plurality of rail pieces 5a. That is, the rail piece 5a is
Its thickness gradually decreases, and it is formed of an L-shaped box in plan view, but its bottom is open and the adjacent rail piece 5a can be slid vertically through the opening 5d. The parts are fitted into each other one after another so as to be movable, so that they are assembled in a so-called telescopic manner, thereby making them expandable and retractable. Here, 5b is a locking piece provided on the inner edge of the opening 5d, and 5c is a locking piece provided on the upper outer edge of the rail piece 5a, which is engaged when the adjacent rail pieces 5a, 5a are extended. This is to prevent protrusion. Further, guide paths 5e for the sheet body 3 are formed on both left and right sides of each rail piece 5a and on the left and right upper portions of the side edges. The sheet body 3 is integrally connected and fixed to the blind bottom portion 5f of the rail piece 5a through the guide path 5e.

Therefore, as described above, when the sheet body 3 is wound up on the winding drum 4, the middle pillar 5 is in the storage position in which the rail piece 5a is completely stored in the case body 1, but in case of a fire. When such occurrences occur, the smoke detector is activated, and in conjunction with the release of the brake, the seat body 3 moves downward, and the rail piece 5a sequentially moves downward, extending and hanging down. There is.

Note that 6 is a sealing material made of an elastic body, and 7 is an end rail embedded in the wall.

In the embodiment of the present invention configured as described above, when the sheet body 3 is wound up on the winding drum 4, the middle pillar 5 is supported within the case body 1 and held in the storage position as described above. However, when smoke is detected in an emergency such as a fire, the brake on the winding drum 4 is released, and as a result, both winding drums 4 are suspended due to the weight of the seat plate 3a and the middle pillar 5. The sheet bodies 3 are automatically fed out by rotating in synchronization. At this time, the middle pillar 5 extends in accordance with the descent of the sheet bodies 3, and simultaneously guides the two sheet bodies 3 together with the end rails 7. I will do it. and,
When the locking pieces 5b and 5c of all the rail pieces 5a are extended until they engage with the locking pieces 5b and 5c of the adjacent rail piece 5a, the middle column 5 is restricted from expanding and is held in a hanging position. Become.

In this way, in the present invention, as the seat body 3 descends, the middle pillar 5 can automatically transform from the storage position to the hanging position. In this case, the middle pillar 5 is different from the conventional one. The structure does not have a cutout or the like that is exposed, creating a gap for smoke to leak, but rather allows the multiple rail pieces 5a to be fitted to slide in the vertical direction, and the locking pieces 5b and 5c to be securely engaged. Since it forms an extended hanging position in an airtight state, it is possible to almost eliminate smoke leakage at the central pillar part of the smoke screen, and moreover, the seat plate 3 of the sheet body 3
Since a and the center pillar 5 are integrated, it is possible to reliably prevent the sheet body 3 from swaying due to hot airflow in the event of a fire.

It goes without saying that the present invention is not limited to the above-mentioned embodiment. For example, by forming an appropriate number of guide paths 5e on the middle pillar 5, the present invention is not limited to the L-shaped one in the above-mentioned embodiment. ,
It can also be adapted to various smoke screen shapes such as T, Y, and X shapes.

[Effect]

In summary, since the present invention is constructed as described above, the guide rail changes from the storage position where it is stored on the ceiling side to the hanging position and guides the seat body. Since the guide rail expands and contracts in an airtight manner by sliding the multiple rail pieces that fit together in the vertical direction, there is no need to provide the guide rail with a notch through which the seat plate passes, as in the past. Therefore, it is possible to reliably prevent the smoke spreading along the ceiling from leaking from the guide rail of the smoke-proof screen, and it is possible to provide extremely excellent smoke-proof performance.

[Brief explanation of drawings]

The drawings show an embodiment of the guide rail structure of the smoke prevention screen according to the present invention, in which FIG. 1 is a schematic plan view of the smoke prevention screen, and FIG. 2 is a vertical cross-section showing the hanging posture of the guide rail. 3 is a vertical sectional view showing the storage position, FIG. 4 is a horizontal sectional view of the rail piece, and FIG. 5 is an exploded perspective view of the guide rail. In the figure, 1 is a case body, 2 is a ceiling, 3 is a seat body, 5 is a center pillar (guide rail), and 5a is a rail piece.

Claims (1)

[Scope of utility model registration request] A guide rail for a smoke screen that can be transformed into a storage position where it is stored on the ceiling side and a hanging position where it guides a sheet body, and the guide rail is provided with a plurality of guide rails that are fitted in sequence so as to be slidable in the vertical direction. It is configured to be expandable and retractable using rail pieces, and a guide path for the sheet body is formed at the side edge of each rail piece.
A smoke-proof screen characterized in that a seat plate at the lower edge of the seat body is integrally connected to the lowest rail piece, and the guide rail extends to a hanging position following the descent of the seat body. Guide rail structure.