JPH0325808Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] 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] Nowadays, structures such as buildings that have a predetermined ceiling area are equipped with the following methods to prevent smoke from spreading along the ceiling during an emergency such as a fire. The Building Standards Act also stipulates that some kind of smoke prevention measures must be taken. Among these smoke prevention measures, the sheet body is automatically lowered from the ceiling in response to a command from a sensor such as a smoke detector.
A device is known in which the ceiling is partitioned into smoke-proof compartments of a predetermined area. However, in such a device, the guide rail that guides the sheet body is always housed in the ceiling, and it is desired that it be made to hang down as the sheet body descends when smoke is detected. Therefore, the present invention was proposed. The applicant is Jikoko 57-
We have developed a technology as shown in Publication No. 57709 and have already had a number of implementation results. However, this product has a structure in which the guide rail is provided with a through hole through which the guide rail passes through the bottom of the groove of a substantially U-shaped groove member that is open on the inside. A gap opens between the sheet body and the guide rail in the area where the hole is provided, and as a result, even the initially generated smoke that spreads along the ceiling surface leaks through this gap. Therefore, there was a need for further improvement.

[Means for solving 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. The guide rail is pivotably supported on the ceiling side, and the roller attached to the guide rail rolls while being supported by the seat plate at the lower end of the sheet body that is being fed out and lowered. The guide rail is capable of transforming into a horizontal storage position in which the seat plate is fitted from below and is stored in the ceiling, and a hanging position in which the seat is guided. A seat piece is provided on the pivot portion side of the rail relative to the roller mounting position, and protrudes toward the seat body side in a state that allows the seat plate to be fitted from the lower side in the storage position. It is.

With this configuration, the present invention allows the guide rail to move downward in conjunction with the lowering of the seat body, but it is possible to eliminate the gap between the seat body and the guide rail as much as possible. As a result, smoke leakage can be reliably reduced and extremely excellent smoke prevention performance can be achieved.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a case body housed in a ceiling 2, and a winding shaft 3 is supported on the case body 1. A sheet body 4 is wound around this winding shaft 3. When the brake is released in response to detection by a smoke detector (not shown), the winding shaft 3 is automatically rotated by the weight of the seat plate 5 provided at the lower edge of the sheet body 4. , sheet body 4
It is designed to lower the

On the other hand, reference numeral 6 denotes a guide rail, and the guide rail 6 is swingably supported at both left and right ends of the case body 4 via a pivot 7, and is installed horizontally in the ceiling 2, as will be described later. It is designed to be able to swing between a storage position in which it is stored in the ceiling 2 and a hanging position in which it hangs down substantially vertically from the ceiling 2. Guide rail 6
When viewed from above in the hanging position, the inner side (the upper side in the stored position) is integrally bent to the sheet body 4 side so that the sheet body 4 can be inserted through the sheet body 4 side, and the opposite edge is the sheet body 4 side. The sheet piece 6b forms a narrow guide 6a, and the outer side is the seat plate 5.
It is formed in an opening shape so that it can be inserted. As will be described later, when the seat body 4 is housed in the case body 1, the seat plate 5 can be fitted into the guide rail 6 from below without being hindered by the seal piece 6b. It's becoming acceptable. Furthermore, the opening edge of the guide rail 6 has a flange 6c.
are integrally formed. Furthermore, a wide notch 6d through which the seat plate 5 can pass is formed at the lower end of the seal piece 6b. Here, 8 is a sheet material made of a spongy elastic body provided on the guide 6a,
The gap between the sheet body 4 and the guide 6a is
The sheet is to be seated in a state that allows sliding.

Reference numeral 9 denotes an upper roller provided inside the upper position of the notch 6d in the guide rail 6, and the seal piece 6b is provided on the pivot shaft 7 side (upper side) than the mounting position of the upper roller 9. The upper roller 9 is arranged to face the upper surface of the seat plate 5. On the other hand, at the lower end of the guide rail 6, the base end of an operating arm 10 is pivoted via a support shaft 10a so as to be able to swing up and down. Lower rollers 11 that roll in guide grooves 5a formed on the surface are each supported by a shaft. When the seat body 4 is stored in the case body 1, the guide rail 6 is supported by the seat plate 5 because the upper roller 9 is in contact with the upper surface of the seat plate 5 from above. The seat plate 5 is housed in the ceiling 2 with the seat plate 5 fitted into the guide rail 6 in the above-mentioned storage position. When the seat body 4 descends from this state, the upper roller 9
The upper surface of the guide rail 6 rolls toward the end, and as a result, the guide rail 6 sequentially moves downward while being supported by the lowering seat plate 5. At this time, as the lower roller 11 rolls in the guide groove 5a, the operating arm 10 rotates around the support shaft 10a. Then, when the actuating arm 10 rotates until it becomes approximately perpendicular to the guide rail 6 and further rotation is restricted by the stopper 12, the guide rail 6 then moves the lower roller 11. When the seat body 4 descends to the lowest end, the guide rail 6 is configured to be in a hanging position in which it hangs down substantially vertically.
In this state, the flange 6c is in close contact with the wall of the building or the flange 6c of the guide rail 6 in the adjacent sheet body 4 (in the case of this embodiment).
It's becoming like that.

In the embodiment of the present invention configured as described above, when the sheet body 4 is wound around the winding shaft 3, the guide rail 6 is moved so that the upper roller 9 is in contact with the upper surface of the seat plate 5 as described above. The winding shaft 3 is held in the stored position by being supported, but when smoke is detected in an emergency such as a fire, the brake of the winding shaft 3 is released, and the winding shaft 3 is moved to the seat plate 5. The seat body 4 is rotated by the weight of the seat plate 5, and the seat body 4 is automatically fed out. At this time, the guide rail 6 automatically moves downward while guiding the seat body 4 in conjunction with the lowering of the seat plate 5. , it will transform into a drooping posture. That is, by lowering the seat plate 5, the guide rail 6
first descends while being supported by the seat plate 5 by the rolling motion of the upper roller 9 on the upper surface of the seat plate 5. Then, when the actuating arm 10 descends until its rotation is restricted by the stopper 12, the guide rail 6 moves as follows.
The lower roller 11 is supported by the seat plate 5 by rolling in the guide groove 5a on the side surface of the seat plate 5, and descends to the hanging position.

In this way, in the present invention, the guide rail 6 can automatically change from the storage position to the hanging position as the seat body 4 descends, but in this case, the guide rail 6 is different from the conventional one. Rather than having a structure in which a gap is created between the guide rail 6 and the sheet body 4 over the entire vertical width of the guide rail 6, the position is closer to the pivot shaft 7 than the mounting position of the roller (in this embodiment, the upper roller 9) that supports the guide rail 6 in a rolling manner. Since the sealing piece 6b is provided at the top and the narrow guide 6a of the sheet body 4 is formed, leakage of smoke from the upper side, which is particularly important, can be almost eliminated at the guide rail portion of the smoke screen. As a result, smoke-proofing performance can be significantly improved. Furthermore, the seal piece 6b for preventing leakage of smoke is formed to allow fitting from the bottom side of the seat plate 5 when the guide rail 6 is stored. This does not impede storage in any way. In particular, we focused on the fact that the seat plate 5 never penetrates the inner surface of the guide rail 6 above the roller mounting position as in this embodiment, and used the inner surface as it is as the seal piece 6b. This is advantageous in that it can simplify the structure as well as the manufacturing process. Here, if the lower end position of the seal piece 6b is set in the required effective lowering area of the smoke prevention sheet,
This provides even more reliable smoke prevention.

In addition, when the emergency situation is lifted, if the winding shaft 3 is reversely rotated using a winding handle (not shown) and the sheet body 4 is wound up, the guiding mechanism is reversed to that of the lowering operation. The rail 6 will be housed in the ceiling 2.

Further, in order to move the guide rail 6 downward in conjunction with the descent of the sheet body 4, the action of the upper roller 9 alone is sufficient, but as in this embodiment, the lower roller 11 is Since the guide rail 6 is provided so as to be located on the inside, even if the guide rail 6 becomes free from the upper roller 9, a supporting action by the lower roller can be obtained, and as a result, the guide rail 6 moves downward vigorously, and the wall In addition, when the sheet body 4 is rolled up, the inner lower roller 11 acts as a lever against the pivot shaft 7. As a result, the upward movement of the guide rail 6 is ensured, which is advantageous and convenient.
Furthermore, the close contact of the flange 6c (see FIG. 6) advantageously prevents leakage of smoke between both guide rails 6.

[Operation and Effect] In summary, the present invention is constructed as described above, and the guide rail changes from the storage position to the hanging position by the rolling bearing of the rollers on the seat plate as the seat body descends. Although it is designed to automatically transform and swing to guide the seat body, the space between the seat body and the guide rail is almost completely blocked by the sheet piece provided on the guide rail. As a result, it is possible to prevent the smoke spreading along the ceiling from leaking from the guide rail of the smoke screen, thereby providing extremely excellent smoke prevention performance. Moreover, this seal piece is provided on the pivot side of the roller mounting position and is designed to allow the seat plate to be inserted into the guide rail from below, so the seat plate of the guide rail can be inserted into the guide rail. The presence of the seal piece does not impede the transformation and rocking of the guide rail in this state, and the shape-changing and rocking of the guide rail is extremely smooth and reliable when the seat plate is fitted. It is something that can be done.

[Brief explanation of the drawing]

The drawings show one embodiment of the guide rail structure of the smoke prevention screen according to the present invention, in which FIG. 1 is an explanatory diagram showing the changing state of the smoke prevention screen, and FIG. 2 is an explanatory diagram showing the descending state. FIG. 3 is a bottom view of the main parts of the same, FIG. 4 is a perspective view of the main parts showing the hanging posture, FIG. 5 is a perspective view of the main parts showing the main parts in the middle of downward movement,
FIG. 6 is a horizontal sectional view of the guide rail in a hanging position. In the figure, 1 is the case body, 2 is the ceiling, 3 is the winding shaft,
4 is a seat body, 5 is a seat plate, 6 is a guide rail, 6
a is a guide, 6b is a seal piece, 7 is a pivot, 8 is a sealing material, 9 is an upper roller, 10 is an operating arm, 11 is a lower roller, and 12 is a stopper.

Claims (1)

[Scope of utility model registration request] One end of the guide rail is swingably supported toward the ceiling, and the roller attached to the guide rail rolls while being supported by the seat plate at the lower end of the sheet body that is being fed out and lowered. The guide rail is capable of transforming into a horizontal storage position in which the seat plate is fitted into the rail from below and is stored in the ceiling, and a hanging position in which the seat plate is guided. A seal piece is provided on the pivot portion side of the guide rail relative to the roller mounting position, and projects toward the seat body side in a state that allows the seat plate to be fitted from the lower side in the storage position. Smoke screen guide rail structure.