JP3482129B2 - Refractory sheet winding shaft - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter winding shaft composed of a fireproof sheet.

[0002]

2. Description of the Related Art Conventionally, it is known that a metal slat is used as a fire and smoke prevention shutter for the purpose of blocking smoke and flame in an emergency such as a fire. Those using sheets have been developed.

The fireproof and smokeproof shutter using the above fireproof sheet is lightweight and can be installed in a large area.
It has features such as high workability and a small volume for installation.

Generally, a fireproof and smokeproof shutter using a fireproof sheet has a structure in which a fireproof sheet is wound around a shaft and installed on a ceiling portion, and is unwound when a fire occurs to function as a shutter.

As described above, the fireproof and smokeproof shutter using the fireproof sheet is suitable for being installed in a place having a large opening area because of its light weight and high workability. However, when the opening area becomes large, the shaft around which the refractory sheet is wound must be elongated.

[0006] Normally, as this type of shaft, one made of long steel is used. The steel shaft is used because it has high strength and high heat resistance, but it has a problem of being heavy. If the shaft becomes heavy, it will be difficult to carry and construct, and the mounting portion of the shaft needs to have a certain level of strength, which causes problems such as limiting the construction site and requiring extra reinforcement work.

Further, as a practical problem, a general elevator for material transportation can only carry a material up to 4 m in length, so that when the shaft becomes long, there is a problem that the elevator for material transportation cannot carry it. .

[0008]

As a method for solving the above problems, the present inventors have studied a material that is lightweight, easy to handle, and has high workability. As a result, aluminum or synthetic resin is a suitable material. It was found that there was such a problem, and we developed a shaft in which a tubular body made of aluminum or synthetic resin was integrated with multiple steel joints.

However, this material cannot pass the fire resistance performance test stipulated by the Ministry of Construction Notification No. 1125 of 1990. Incidentally, this test is a test in which the temperature inside the furnace is raised from room temperature to 925 ° C. over 1 hour, and the state of the test object (fire and smoke prevention shutter) during that time is observed.

That is, in the shaft having a structure in which the tubular body made of aluminum or synthetic resin is integrated by a steel joint, the aluminum or synthetic resin melts or becomes soft when exposed to a high temperature during a fire. I will end up. Therefore, the fire-resistant sheet may come off the shaft, and the sheet may fall from the ceiling position.

In order to solve this problem, the present inventors have made various improvements, and as a result, as a shaft around which a refractory sheet is wound, a plurality of tubular bodies made of aluminum or synthetic resin are joined to each other by a steel joint and a flat bar. By constructing a shaft with a split structure that is integrated by and, even if the above-mentioned aluminum or synthetic resin tube body melts in the event of a fire, a shaft that does not impair the function as a fire and smoke prevention shutter has been developed. An object of the present invention is to provide a take-up shaft for a refractory sheet that does not fall off from the shaft even when a fire occurs.

[0012]

The first invention of the present invention is as follows:
Each of the joints is inserted into both ends in the pipe body, the pipe body and the joint are integrated via a rod-shaped body arranged on the surface of the pipe body, and the end of the fire-resistant sheet is attached to the pipe body by the rod-shaped body, The joint and rod have higher heat resistance than the tube body , so the tube body melted in the event of a fire.
However, even if it becomes soft, the joint structure and rod-shaped body
A refractory sheet is supported . According to a second aspect of the present invention, a plurality of pipe main bodies are connected to each other via joints, and the pipe main bodies and the joints at both ends are integrated and connected via a rod-shaped body arranged on the surface of each pipe main body. The end of the fireproof sheet is attached to the pipe body of the pipe body by a rod, and the joint and the rod have higher heat resistance than the pipe body, so that the pipe body melts or becomes soft in the event of a fire.
Even in this case, the joint-shaped joint and the rod-shaped body are fireproof.
The feature is that the boot is supported .

In a third aspect of the invention, the pipe body is made of a material that cannot withstand a predetermined fire resistance test, and the joint and the rod-shaped body are made of a material that can withstand a predetermined fire resistance test. The fourth invention is characterized in that the fire resistance test can cope with a condition of 925 ° C. for 1 hour. The fifth invention is characterized in that the pipe body is made of aluminum or synthetic resin, and the joint and the rod-shaped body are made of steel.

[0014]

According to the first aspect of the present invention, even if the main body of the shaft melts or becomes soft in the event of a fire, the joint-structured joint and the rod-shaped body can support the fire-resistant sheet. In the second invention, a long shaft that can be composed of a plurality of tube bodies also has the same effect as in the first invention.

According to the third and fourth inventions, since the joint and the rod-like body can withstand the high temperature at the time of fire, there is the same action as the first and second inventions, and the fifth invention. According to the invention, the weight can be reduced, and the same operation as the first to fourth inventions can be achieved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. 1 is a schematic perspective view showing an example of a winding shaft of a fire-resistant sheet according to the present invention, FIG. 2 is a sectional view for explaining the same, and FIG. 3 is a schematic perspective view showing two examples of the shaft, FIG.
FIG. 4 is a schematic perspective view showing a melted state of the tubular body of the shaft shown in FIG. 3.

The shaft 1 shown in FIG. 1 is an example of a single structure, and tubular joints 3a and 3b are inserted into both ends of the pipe body 2 and fixed by screws. The joints 3a and 3b function as a joint that connects the tube body 2 and a shaft described later. Then, the rod-shaped body 4 made of a flat bar is arranged on the surface of the tube body 2, and the rod-shaped body 4 is fixed to the tube body 2 with screws 5, 5 ,. Also, the pipe body 2
At both ends of the pipe, the pipe body 2 and the inserted joints 3a and 3b are integrally fixed with screws 5 or the like,
The joints 3 a and 3 b are strongly connected via the rod-shaped body 4.

Fire-resistant sheet 6 wound around the shaft 1.
As shown in FIG. 2, its end is attached to the rod-shaped body 4 and wound around the shaft 1. More specifically, the end of the fire resistant sheet 6 is sewn in a bag shape,
The rod-shaped body 4 is housed inside the bag. Then, the rod-shaped body 4 is fixed to the tube body 2 with screws 5, so that the refractory sheet 6 is fixed to the shaft 1. The tray 7 supports the refractory sheet 6 wound around the shaft 1 and, when pulling out the refractory sheet 6, slides on the tray 7. Further, as a holding structure for the shaft 1, the shafts 8a, 8
b is inserted and held by a bearing (not shown). In the shaft 1 of FIG. 1, the joint 3a,
Steel shafts 8a and 8b are further inserted inside 3b and are fixed by welding.

The joints 3a, 3b and the rod-shaped body 4 are made of a material having a higher heat resistance than the tube body 2, and the following materials can be mentioned so as to be compatible with the above fireproof performance test. Considering that the pipe body 2 is a material that is lightweight, easy to handle, and has high workability, aluminum or a synthetic resin material can be used, and the joints 3a and 3b are
It is preferred to use a steel tube. Further, it is preferable to select a steel flat bar for the rod-shaped body 4.

The shaft 10 shown in FIG. 3 is an example of a structure in which two tube bodies are integrated, but the tube body used is 2
Not limited to books, any number of tube bodies can be used. In this shaft 10, two pipe bodies 11a and 11b are joints 12b.
Are connected via. That is, the pipe bodies 11a, 11
b is fixed with screws by inserting the joints 12b into the pipe main bodies 11a and 11b facing each other with a space 13 and fixing the same joints 12a and 12c to both ends of the pipe main bodies 11a and 11b. Fixed by. Further, steel shafts 17a and 17b are inserted into the inside thereof and fixed by welding. The space 13 is not always necessary, and the ends of the pipe bodies 11a and 11b may be in close contact with each other.

The pipe bodies 11a and 11b connected through the joint 12b are rod-shaped bodies 14 and 14 each formed of a flat bar for each of the pipe bodies 11a and 11b.
Are fixed to the tube main bodies 11a and 11b with screws 15 or the like. In addition, this rod-shaped body 14 is used for
It is preferable that the lengths of the pipes 11a and 11b are substantially the same as the lengths of the pipes 11a and 11b. It is strongly fixed with screws 15 or the like.

A refractory sheet 16 is attached to the shaft 10 having the above structure by a rod-shaped body 14 and wound around the shaft 10. In addition, the pipe bodies 11a and 11b that form the shaft 10 and the joint 12
As the material of a, 12b, 12c and the rod-shaped body 14, it is preferable to use the same material as that of the shaft 1 described above.

Examples of the fire resistant sheets 6 and 16 include silica cloth, glass cloth, resin cloth coated silica cloth or glass cloth, and cloth knitted with stainless steel thread. Of course, it is a cross that can be handled. The lengths of the rod-shaped bodies 4 and 14 are, as described above,
It is preferable that the dimension length is the same as a and 11b, but there is no reason why the dimensions must be the same. However, it is useful to have the same dimensions in normalizing the dimensions of the material.

The shafts 1 and 10 according to the present invention can reduce the weight of the entire shaft. At the same time, even if the pipe bodies 2, 11a, 11b are exposed to a high temperature and melt during a fire, the joints 3a, 12a, ... And the rod-shaped bodies 4, 14 have heat resistance, and both are connected. It is a composition. Therefore, as shown in FIG. 4, for example, the connected state of the shaft 10 is maintained even if the pipe bodies 11a and 11b are not present.

Further, since the fire-resistant sheets 6 and 16 are supported by the joints 3a, 12a, ... And the rod-shaped bodies 4 and 14, even if the pipe bodies 2, 11a and 11b are melted or become soft, the fire-resistant sheets are fire-resistant. It is possible to prevent the sheets 6 and 16 from falling. It should be noted that the shaft itself is supported by a bearing (not shown) or supported by the tray 7 to prevent the shaft itself from falling.

[0026]

EFFECTS OF THE INVENTION According to the present invention, the pipe body which is lightweight but has low heat resistance, and the heat-resistant joint and rod-shaped body for connecting the pipe body are integrated, so that the weight can be reduced. it can. Furthermore, since the heat-resistant joint and the rod-shaped body are integrated, even if the pipe body is exposed to high temperature and melts or becomes soft during a fire, the fire-resistant sheet does not drop.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an example of a winding shaft of a fire resistant sheet according to the present invention.

FIG. 2 is a sectional view for explaining the same.

FIG. 3 is a schematic perspective view showing two examples of shafts.

FIG. 4 is a schematic perspective view showing a melted state of the tubular body of the shaft shown in FIG.

[Explanation of symbols]

1 shaft 2 tube body 3a, 3b joint 4 Rods 6 Fireproof sheet

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic data Sho 57-8297 (JP, U) Real development Sho 62-113295 (JP, U) Japanese Patent Sho 44-27274 (JP, B1) (58) Field (Int.Cl. ⁷ , DB name) E06B 9/171 E06B 9/174 E06B 9/56 A62C 2/06

Claims (5)

(57) [Claims] 1. A pipe body and a joint are integrated through a rod-shaped body arranged on the surface of the pipe body by inserting joints into both ends of the pipe body, and the pipe body is made of a fire-resistant sheet. Since the joint and the rod-shaped body have higher heat resistance than the pipe body , the pipe body does not melt or become soft during a fire.
Even if the joint-structured joint and rod are used,
A winding shaft of a fire resistant sheet, which is supported . 2. A plurality of pipe main bodies are connected to each other via joints, and each pipe main body and joints at both ends are integrated and connected via a rod-shaped body arranged on the surface of each pipe main body. The end of the fire-resistant sheet is attached to the pipe body by a rod-shaped body, and the joint and the rod-shaped body have higher heat resistance than the pipe body, so that the pipe body does not melt or become soft during a fire.
Even if the joint-structured joint and rod are used,
A winding shaft of a fire resistant sheet, which is supported . 3. The pipe main body is made of a material that cannot withstand a predetermined fire resistance test, and the joint and the rod-shaped body are made of a material that can withstand a predetermined fire resistance test. The winding shaft of the fire-resistant sheet according to claim 1. 4. The take-up shaft for a fire resistant sheet according to claim 3, wherein the fire resistance test can be applied to a condition of 925 ° C. for 1 hour. 5. The winding shaft for a refractory sheet according to claim 1, wherein the pipe body is made of aluminum or synthetic resin, and the joint and the rod-shaped body are made of steel.