JPH0746739A - Fireproof structure of part passed through by cable - Google Patents

Abstract

PURPOSE:To provide simple structure and carry out mounting work from one side of a concrete wall when a fireproof closing member for a cable is mounted through a concrete wall. CONSTITUTION:In a fireproof closing member 20, a fireproof plate 21 is mounted on one side of the through hole 6 when a cable rack 2 for supporting a cable 1 is put through a through hole 6 drilled in a concrete wall 5. An upper horizontal plate member 30 and a lower horizontal plate member 31 on upper and lower sides of the cable rack 2 are provided through an opening of the fireproof plate 21. Then, a surrounding part of the cable rack 2 and an inner space of the cable rack 2 are filled with fireproof putty 28 to close the space around the cable. In this way, the mounting work is carried out on one side of the wall, a fireproof closing member 20 is constructed easily even in a space with working restrictions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire protection provided in a penetrating portion of a cable such as a wall or floor of a building such as a building or a factory when an electric wire or cable (hereinafter abbreviated as cable) is provided therethrough. Regarding the structure.

[0002]

[Prior Art] In buildings such as buildings, factories, and hotels,
In the event of a fire, a fireproof structure should be provided at the cable penetration part of the wall, etc. to prevent the fire from spreading to other parts through the opening of the wall etc. through which the cable penetrates. It is being appreciated. As the fireproof structure, an opening such as a concrete wall through which the cable penetrates is filled with a fireproof material so as to cover the periphery of the cable. For example, as shown in FIG. is doing. In the example shown in FIG. 9, when the through hole 6 is provided in the concrete wall 5 of the building to penetrate the cable 1, fireproof plates 11 and 12 are arranged on both sides of the concrete wall 5, respectively, and the anchor bolt 13 ...... is fixed and the cable is passed through the opening provided in the fireproof plate.

Further, the through hole 6 of the concrete wall between the fireproof plates on both sides is filled with rock wool 15 or the like to prevent a gap from being formed around the cable, and the outside of the fireproof plate is provided with fire resistance. Covering portion 16 with putty or the like,
17 is provided so that a gap or the like is not formed between the through hole such as a wall and the cable and the hermeticity can be secured. As the material constituting the fireproof closing member 10, the fireproof plates 11 and 12 are plate members made of calcium silicate, and the fireproof putties 16 and 17 are DF putties (made by Mitsubishi Cable Industries, Ltd. It is possible to use the product name of putty etc. The fireproof closing member 10 configured as described above is capable of exhibiting fireproof performance for 2 hours, for example, and even when the maximum temperature reached during heating in the disaster prevention test is 1010 ° C. or higher, The opening 6 to be formed can be kept in a sealed state.

[0004]

However, as shown in FIG. 9, fireproof plates are fixedly arranged on both sides of the concrete wall, and a fireproof material such as rock wool is provided inside the through hole of the concrete wall. When filling the material, it is necessary to work from both sides of the concrete wall. But,
When passing a cable through a through hole provided in a wall or floor of a building, if there is a double ceiling or a place where it is difficult for people to enter, it is often possible to perform construction only from one side of the wall. There is a problem that the fireproof plate cannot be fixed on both sides of the wall or the like. Further, when rock wool or the like is filled in the through hole of the concrete wall, dust of the rock wool or the like may be scattered around, and the work place becomes dusty, which is troublesome to clean. Furthermore, by providing a layer of fireproof putty on the surface of the wall, etc.,
There are also aesthetic problems such as the surroundings of the fireproof closing member becoming soiled, the putty falling off, and depending on the skill of the construction engineer, the surface of the fireproof putty cannot be finished smoothly. In addition to the above problems, there is a problem in that the work efficiency is not good if the fireproof plates are fixed to both sides of the concrete wall with anchor bolts or the like, and the periphery of the exposed portion of the cable is painted with fireproof putty.

[0005]

It is an object of the present invention to solve the above-mentioned problems of the conventional fire prevention structure for the cable penetration portion, and the construction can be performed from one side of the wall or the like, and the number of constituent members is small and the construction is easy. Moreover, it is an object of the present invention to provide a fireproof structure for a cable penetrating portion that can be quickly performed and can maintain good fire resistance.

[0006]

The present invention relates to a fireproof structure in which a cable is penetrated through a through hole provided in a fireproof wall such as a concrete wall, and the through hole for arranging the cable is closed by a fireproof member. . In the present invention, a refractory plate is arranged on the side surface of the wall corresponding to one side of the through hole provided in the concrete wall, and a putty member having fire resistance is filled between the refractory plate and the concrete wall to secure the fixing means. And through which the cable penetrates through the opening provided in the fireproof plate, arrange plate members having fire resistance on the upper and lower surfaces of the cable, and fill the space between the upper and lower fireproof plate members with a fireproof putty. It is configured by In addition, in the present invention, the fireproof plate arranged along the wall surface is configured by two plate members, and an opening for penetrating the cable is provided at the center of the connecting portion of both plate members, and the fireproof plate is arranged above and below the cable. The plate member is configured as a plate member that is wider than the width of the opening provided in the fireproof plate, and notches are provided at positions on both sides corresponding to the opening of the fireproof plate, and a predetermined length from both front and back surfaces of the fireproof plate. It is possible to form a protection portion for the cable by arranging it so as to project over.

[0007]

As described above, according to the present invention, when fixing the fireproof plate to one side of the wall with respect to the cable through hole provided in the concrete wall or the like, the member below the fireproof plate is attached to the wall or the like. The lower horizontal plate member supporting the lower part of the cable is attached to the through hole, and the cable or the cable rack is arranged through the lower horizontal plate member. Then, a fireproof putty or the like is tightly packed around the cable, an upper horizontal plate member is arranged on the upper side of the cable, and the cable is surrounded by the fireproof putty and sandwiched by plate members from above and below to form a fireproof plate. The upper horizontal plate of the fireproof plate is fixed to a wall or the like so that no gap is created between the two plate members. Also, with a fireproof putty etc. sandwiched between the surface of the concrete wall and the fireproof plate,
Since the fireproof plate is fixed, no gap is formed on the surface of the concrete wall on which the fireproof plate is arranged, and it is possible to ensure hermeticity and fire resistance.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fire prevention structure for a cable penetrating portion according to the present invention will be described with reference to the illustrated example. The embodiment of the present invention shown in FIGS. 1 and 2 shows a case where a cable rack 2 supporting a large number of cables 1 ... Is arranged through a through hole 6 in a concrete wall 5 of a building. The fireproof closing member 20 for the through hole 6 provided in the concrete wall 5
Are arranged to form a fireproof structure in the through hole 6, and the fireproof closing member 20 has a fireproof plate 21 on one side surface of the wall with respect to the through hole portion of the concrete wall 5. The fireproof plate 21 is provided with an opening through which a cable is passed.
The refractory plate 21 is configured by combining two plate members, an upper vertical plate 23 and a lower vertical plate 25, in order to facilitate construction work, and as shown in FIG. An opening 22 for passing a cable rack is provided at the center of the connecting portion of the two plate members 23 and 25. The plate members 23 and 25 constituting the refractory plate 21 can use a calcium silicate plate having a thickness of 40 mm and having a fireproof performance for 2 hours, and by forming an opening using a tool such as a saw. , An opening having a size corresponding to a cable rack or the like can be easily provided. Further, in the cable 1 arranged through the opening provided in the fireproof plate 21, the upper horizontal plate member 30 and the lower horizontal plate member 31 are arranged on the upper and lower surfaces of the cable rack 2, and the fireproof putty 28 is provided between the upper and lower plate members. Is filled without any gap so that the circumference of the cable 1 can be covered.

In the fireproof closing member 20 of the present invention shown in FIGS. 1 and 2, the fireproof plate 21 as a fireproof plate member, the upper horizontal plate member, the lower horizontal plate member, etc. are shown in FIGS. It is configured as follows. Fireproof plate 2 shown in FIG.
1 is the upper vertical plate 23 and the lower vertical plate 2 as described above.
5, the notch portions 24 and 26 are respectively provided at the connecting portions of the respective plate members, and the opening portion 22 having a width W is formed at the central portion of the connecting portions of the both plate members. . In the embodiment shown in FIG. 1 of the present invention, the opening 22 for passing the cable is set according to the width of the cable rack 2, but the height of the opening is a plate member arranged above and below the cable rack. It is configured as the thickness of.

The upper horizontal plate member 30 and the lower horizontal plate member 31 arranged above and below the cable rack 2 are constructed in the same shape as the plate member 35 shown in FIG. 4, and have a thickness of 25 mm. Composed of calcium silicate board. In the plate member 35, the plate member having the width W1 and the length L2 is provided with recesses 36 and 36a cut out on both sides of the substantially central portion thereof.
The width W of 6a is formed to be the same as the width of the opening 22 provided in the fireproof plate 21. The cut length h of the recess provided in the plate member 35 is formed to be the same as the plate thickness of the refractory plate 21, but in the embodiment of the present invention, the cut length h is set to 40 mm. Further, with respect to the concave portion, a wide portion having a length L and L1 is formed in the front and rear portions thereof, and the protruding portion protrudes from the front and rear portions of the fireproof plate 21 to support the cable. , To be able to exert a fire prevention function between rooms partitioned by concrete walls. The front and rear protrusion lengths L and L1 of the plate member are 1
When it is set to be 00 mm or more, the fire resistance of the fire resistant closing member can be maintained good.

As the plate member arranged along the surface of the wall or the like according to the present invention, the plate member 37 having the shape shown in FIG. 5 is used in addition to the member having the structure shown in FIG.
Can also be used. The plate member 37 shown in FIG.
With respect to the base portion having the width W1, the tip portion having the width W is provided at the tip portion of the portion having the length L via the step portions 38 and 38a provided on both sides. Then, when the plate member 37 is attached to the opening of the fireproof plate, the plate member can be attached by inserting the plate member from one side into the notch provided in the plate member of the fireproof plate. .

The opening 2 of the refractory plate 21 shown in FIG.
2, when the cable rack 2 supporting the cable 1 is fixedly held, the space inside the cable rack 2 is filled with the fireproof putty 28 so as to cover the periphery of the cable as shown in FIG. To do. As the fireproof putty, for example, the DF putty as described above can be used, and the plate members 30 and 31 arranged in the upper and lower portions of the cable rack are prevented from forming a gap so that the plate member A refractory putty 28 is placed over the entire length. Further, in the present invention, for example, as shown by the phantom line in FIG. 3, the putty 32, 33 having fire resistance can be held on both sides of the opening 22 without dropping. When the plate members arranged above and below the cable rack are configured as shown in FIG. 4, side plate members having a width corresponding to the height of the cable rack are arranged on the side portions of the cable rack. The fireproof putty can be filled between the plate members having fire resistance, and between the upper and lower vertical plate members and the cable rack.

With respect to the refractory plate 21 shown in FIG. 3,
When the plate members shown in FIG. 4 or 5 are combined to form the fireproof closing member, the assembling work can be performed in the order shown in FIGS. 6 to 8. 6 and 7
As shown in Fig. 1, first, the lower vertical plate 25 of the fireproof plate is fixed to the through hole 6 of the concrete wall 5 by using anchor bolts 27, and the fireproof putty is placed between the lower vertical plate and the concrete wall. Make sure that no space is created by sandwiching 29. And the lower vertical plate 2 fixed to the concrete wall
5, the lower horizontal plate member 31 is assembled so that the concave portion is located in the cutout portion 36, and the lower horizontal plate member 31 is fixed to the bottom portion of the cutout portion 36 of the lower vertical plate.
After that, as shown in FIG. 8, the fireproof putty 28 is filled in the lower gap of the cable rack over the entire length of the lower horizontal plate member, and further, between the cables supported by the cable rack. Fill the upper space with refractory putty,
After positioning the upper horizontal plate member 30 thereon, the upper vertical plate 23 is attached. The upper vertical plate 23
The upper part of the cable rack and the upper horizontal plate member 30 in the notch
When arranging and fixing the upper vertical plate 23 on the side surface of the concrete wall in a state of housing, the refractory putty 29a is interposed between the concrete wall and the upper vertical plate so that no gap is generated.

By combining the respective constituent members using the method as described above, the fireproof closing member 20 as shown in the side view of FIG. 1 and the front view of FIG. 2 can be constructed. Further, when using the method for forming a fireproof closing member of the present invention, even if there is no space to work on both sides of the concrete wall, the fireproof plate is attached corresponding to one surface of the concrete wall, A fireproof closing member can be formed for the cables arranged between the plate members having fire resistance through the plate members. Further, the plate member used in the fireproof closing member of the present invention uses calcium silicate, but other plate members having arbitrary fire resistance can be used, and the concave portion can be formed by using a tool such as a saw. By providing or providing a notch, it is possible to easily provide an opening through which the cable passes.

Further, as the fireproof putty to be placed between the concrete wall and the fireproof plate and the fireproof putty to fill the inside and the periphery of the cable rack, the DF putty can be used as described above. Another refractory putty may be used as long as it has the same characteristics as the putty. In addition, in the embodiment of the present invention, the fireproof member when a cable penetrates a wall of a building or the like has been described, but the fireproof closing member of the present invention is also applied to a cable that penetrates a floor or the like. Is possible. And, for the thing in which the cable penetrates the floor or the like up and down, the fireproof closing member shown in the above-mentioned embodiment can be arranged in the up-down direction, and the fireproof closing can be performed from above or below the floor. It is possible to perform work to attach the members.

[0016]

The fireproof structure of the cable penetrating portion of the present invention is
Since the fireproof closing member having the above-described configuration is provided, the work of constructing the fireproof closing member can be easily performed from one side of the concrete wall to the through hole provided in the concrete wall. The process can be simplified. Further, the fireproof closing member of the present invention can close the through hole of the concrete wall with a plate member having fire resistance, and can close the periphery of the cable or the cable rack with the plate member having fire resistance and the fireproof putty without a gap. , The type and number of materials used can be reduced. Furthermore, since the fire-resistant member protruding to one side of the fire-resistant plate covers the cable and the upper and lower surfaces of the fire-resistant putty with the plate member, it is more beautiful than the conventional fire-resistant putty mounted around the cable. The above problems will not occur. In addition, the fireproof closing member of the present invention can have the property of fireproofing for 2 hours even by providing a relatively simple fireproofing mechanism, and can fulfill the role of fireproofing of a building or the like.

[Brief description of drawings]

1 is a side view of a fire resistant closure member of the present invention. FIG.

2 is a front view of the fireproof closure member of FIG. 1. FIG.

FIG. 3 is an explanatory view of a fireproof plate of the present invention.

FIG. 4 is a plan view of a plate member of the present invention.

FIG. 5 is a plan view of another example of the plate member of the present invention.

FIG. 6 is a side view showing a state in which a cable rack is combined with the lower member of the fireproof plate of the present invention.

FIG. 7 is a plan view of the state of FIG.

FIG. 8 is an explanatory diagram showing a state in which an upper vertical plate is combined with a lower vertical plate.

FIG. 9 is an explanatory view showing a structure of a conventional fireproof closing member.

[Explanation of symbols]

1 cable, 2 cable rack, 5 concrete wall, 6 opening, 10 fireproof closing member, 11, 12 fireproof plate, 15 rockwool,
16 ・ 17 Fireproof putty, 20 Fireproof closing member,
21 fireproof plate, 22 opening, 23/25 plate member, 28 fireproof putty, 30/31 horizontal plate member, 35/37 plate member.

Claims (2)

[Claims] 1. A fireproof structure in which a cable is penetrated through a through hole provided in a fireproof wall such as a concrete wall, and the through hole in which the cable is arranged is closed by a fireproof member, wherein one of the through holes provided in the concrete wall The fireproof plate is arranged on the side surface of the wall corresponding to the side of, and the putty member having fire resistance is filled between the fireproof plate and the concrete wall and fixed by the fixing means, and the cable is attached to the opening provided in the fireproof plate. A fireproof structure for a cable penetrating portion, wherein plate members having fire resistance are arranged on the upper and lower surfaces of the cable while being penetrated, and a space between the upper and lower fire resistant plate members is filled with a fireproof putty. 2. A refractory plate arranged along the wall surface or the like.
A fire-resistant plate member that is made up of two plate members, has an opening through which the cable penetrates in the center of the connection between both plate members, and the fire-resistant plate member that is placed above and below the cable is a plate member that is wider than the width of the opening provided in the fire-resistant plate. With the configuration, notches are provided at positions on both sides corresponding to the opening of the fireproof plate, and the cutouts are arranged so as to project from the front and back surfaces of the fireproof plate over a predetermined length to form a protection portion for the cable. The fireproof structure for a cable penetration portion according to claim 1.