KR102729945B1 - sleeve assembly with heat shielding function - Google Patents

Abstract

A sleeve assembly having a heat-insulating function is disclosed. The sleeve assembly having a heat-insulating function of the present invention is installed in a through-hole provided in a floor or wall of a building and has a structure capable of connecting first and second cable trays, to which cables are fixed at the upper and lower sides, respectively, and is characterized by including: a sleeve embedded in a concrete structure and having a through-hole formed so that a plurality of cables fixed to the first and second cable trays can penetrate the inside; and a tray coupling part detachably coupled to the sleeve and capable of coupling the first and second cable trays, respectively, wherein the tray coupling part includes first and second tray coupling part bodies detachably coupled to opposite sides of the sleeve; and a plurality of heat-insulating plates provided at one of the longitudinal ends of the first and second tray coupling part bodies so as to cover the cables exposed to the outside of the sleeve in a circumferential direction. According to the present invention, since the heat-insulating plates are provided to cover the cables in a circumferential direction, heat conducted through the cables in the event of a fire can be stably blocked from spreading to a surrounding indoor space.

Description

Sleeve assembly with heat shielding function

The present invention relates to a sleeve assembly having a heat-insulating function that improves fire resistance by completely shielding a penetration hole when performing work of shielding the inside of a penetration hole provided in a floor or wall of a building.

With the development of industry, modern architecture is increasingly constructing large, high-rise buildings for the purpose of efficient space utilization and high added value creation. In the construction of these buildings, the limitations of public firefighting power are clear, and the independence of the self-sufficient fire prevention system is an important performance requirement.

In extinguishing fires, mechanical solutions such as sprinklers are called active systems, while methods using architectural solutions such as fireproofing, fire compartments, and fire-resistant structures are called passive systems. Compared to active systems, passive systems are a more fundamental approach to the occurrence and extinguishment of fires, and can prevent casualties by suppressing ignition, spread, and propagation of fire through building materials, and securing a certain amount of time required for evacuation from toxic gases, smoke, and heat.

All buildings have electrical and plumbing facilities, and there are penetrations to connect these facilities. The structure that seals the penetrations of the fire compartment that can become a path for flames to spread is called a fire-resistant filling structure. The fire-resistant filling structure is designed to prevent flames or toxic gases from rapidly spreading to adjacent rooms or floors when a fire breaks out in a building, and prevents the spread of fire through horizontal and vertical equipment penetrations, joints, and gaps between curtain walls and floors in the fire compartment.

To elaborate, when constructing high-rise apartments or other buildings, sleeves are installed on each floor to create penetration holes for installing cable trays.

These sleeves are applied as OPEN-type sleeves in which cable trays are installed through the top and bottom, and as integral sleeves in which cable trays are connected to the cable trays through separate brackets at the top and bottom without through the top and bottom.

Among these, when installing a cable tray (20) by applying an OPEN-type sleeve (10) as shown in Fig. 1, the cable tray (20) is installed penetratingly in almost close contact with the back surface (rear inner surface) of the sleeve (10).

Afterwards, after the worker fixes the cable to the rung (21) of the cable tray (20) and performs the cable installation work, a fireproof filling structure is installed using a fireproof foam pad (40) in the inner space of the sleeve. However, as illustrated in FIG. 1, due to the close contact between a pair of support bars of the cable tray and the rear inner surface of the sleeve, no work space (work space for installing the fireproof foam pad) for the fireproof filling structure on the rear side of the cable is provided. For reference, the fireproof foam pad (40) can be filled at least once into the inner side of the sleeve depending on the change in the height of the sleeve (10), and FIG. 1 illustrates a case where it has been filled twice.

To elaborate, the worker installs a fire-retardant foam pad to shield the inner penetration hole of the sleeve at the front side of the cable, but due to the close contact between the cable tray (20) and the inner rear side of the sleeve, i.e., due to the narrowness of the working space or the lack of a working space, it is difficult to install a fire-retardant foam pad at the rear side of the working cable (50).

Meanwhile, the test standard for fire-resistant filling structures with fire-retardant foam pads installed in this way is disclosed in the Ministry of Land, Infrastructure and Transport's Notice KSF ISO 10295-1, and specifically, only fire-resistant filling structures that have passed the heat and flame resistance tests in a 1,000-degree heating furnace for 2 hours can be installed. In addition, this test pass standard is that the temperature of the non-heated side in the heat insulation test should not exceed 180 degrees compared to the initial temperature. In other words, if a fire breaks out on one side (heated side) of the wall, the temperature on the other side (non-heated side) should not exceed 180 degrees compared to the initial temperature.

Currently, to meet these test standards, a method of wrapping the exposed work cable (50) on the upper side of the sleeve (10) with an insulating material (e.g., cerak wool) is widely applied.

However, when wrapping with insulating material (ceramic wool) in this way, it is expected that it will be difficult for the insulating material to maintain its initial form or function, considering that the building's lifespan is approximately 30 years or more.

Republic of Korea Patent Publication No. 10-1984860 (announced on May 31, 2019)

The present invention has been made to solve the above-mentioned conventional problems, and aims to provide a sleeve assembly having a heat-insulating function that can not only improve workability without requiring a separate heat-insulating material (cera wool) work, but also permanently and firmly maintain the heat-insulating function.

Another purpose of the present invention is to provide a sleeve assembly having a structure and material capable of shielding a penetration hole provided in a floor or wall of a building by foaming and expanding due to heat, thereby allowing a worker to more easily and perfectly perform a shielding operation for fireproof filling of the penetration hole (inner area of the sleeve assembly), thereby ultimately providing a sleeve assembly having a heat-insulating function that can perfectly secure fireproof filling structure performance.

According to one aspect of the present invention, a sleeve assembly having a heat-insulating function is provided, the sleeve being installed in a through-hole provided in a floor or wall of a building and having a structure capable of connecting first and second cable trays, to which cables are fixed at the upper and lower sides, respectively, and being embedded in a concrete structure and having a through-hole formed therein so that a plurality of cables fixed to the first and second cable trays can penetrate the inside thereof; and a tray coupling part detachably coupled to the sleeve and to which the first and second cable trays can be respectively coupled, wherein the tray coupling part comprises first and second tray coupling part bodies detachably coupled to opposite sides of the sleeve, respectively; and a plurality of heat-insulating plates each provided at one of the longitudinal ends of the first and second tray coupling part bodies so as to circumferentially cover the cables exposed to the outside of the sleeve.

The plurality of heat-blocking plates may include first and second rear heat-blocking plates, which are respectively provided at rear-side corners of longitudinal ends of the first and second tray coupling bodies to cover rear sides of the cables exposed to the outside of the sleeve; and first and second front heat-blocking plates, which are respectively provided at front-side corners of longitudinal ends of the first and second tray coupling bodies to cover front sides of the cables exposed to the outside of the sleeve.

The first and second rear heat-blocking plates are fixed so as not to rotate relative to the first and second tray coupling bodies, and the first and second front heat-blocking plates can be hinge-rotatably coupled relative to the first and second tray coupling bodies.

The first and second rear heat-blocking plates are fixed so as not to rotate relative to the first and second tray coupling bodies, and the first and second front heat-blocking plates can be detachably coupled to the first and second tray coupling bodies via coupling members.

The plurality of heat-blocking plates may include first and second rear heat-blocking plates, which are respectively provided at rear edge portions of longitudinal ends of the first and second tray coupling bodies to cover rear sides of the cables exposed to the outside of the sleeve; and one front heat-blocking plate, which is detachably coupled to front edge portions of longitudinal ends of the first and second tray coupling bodies through coupling members to cover front sides of the cables exposed to the outside of the sleeve.

The above one front heat-insulating plate may be made of a flame-retardant or non-flammable plastic material, or may include a metal plate made of a metal material, and a flame-retardant insulating material provided on the inner surface of the metal plate made of the metal material facing the cable.

Based on the state in which the first and second rear heat-blocking plates and the first and second front heat-blocking plates are respectively installed facing each other with respect to the first and second tray coupling bodies, the protruding end of the first rear heat-blocking plate protruding from the first tray coupling body and the protruding end of the second rear heat-blocking plate protruding from the second tray coupling body may be in contact with each other, and the protruding end of the first front heat-blocking plate protruding from the first tray coupling body and the protruding end of the second front heat-blocking plate protruding from the second tray coupling body may be in contact with each other.

Based on a state in which the first and second rear heat-blocking plates and the first and second front heat-blocking plates are respectively installed facing each other with respect to the first and second tray coupling bodies, a protruding end of the first rear heat-blocking plate protruding from the first tray coupling body and a protruding end of the second rear heat-blocking plate protruding from the second tray coupling body may be separated from each other by a distance less than a set distance, and a protruding end of the first front heat-blocking plate protruding from the first tray coupling body and a protruding end of the second front heat-blocking plate protruding from the second tray coupling body may be separated from each other by a distance less than a set distance.

The above setting distance can be 1 to 10 mm.

The first and second tray coupling bodies may each include: a central coupling body fixed to the sleeve; an upper coupling body hinge-rotatably coupled to an upper side of the central coupling body so as to close an upper opening of the sleeve, and having the plurality of heat-blocking plates provided at both ends in the width direction thereof; and a lower coupling body hinge-rotatably coupled to a lower side of the central coupling body so as to close a lower opening of the sleeve.

The above sleeve may be a refractory foam sleeve including a foamable material that can expand and foam by heat to shield the inside of the penetration hole.

The above-mentioned refractory foam sleeve may include a sleeve body formed of a foam material and formed by injection molding in a through-hole shape with upper and lower openings; and a plurality of sleeve protrusions protruding from an outer surface of the sleeve body, each of which has a plurality of communication holes formed on both sides of the sleeve body to communicate with each other, and a nut insertion groove formed on the outer side thereof, and which are embedded in a concrete structure when concrete is poured and can be fixed by the concrete structure.

The sleeve may be integrally provided with at least one additional cable insertion portion made of a foamable material that expands and foams with the same heat as the sleeve body and having a preliminary through hole provided to allow an additional cable to pass through in the vertical direction.

According to the sleeve assembly having the heat-insulating function of the present invention described above, since the heat-insulating plate is provided to cover the cable in the circumferential direction, heat conducted through the cable in the event of a fire can be reliably blocked from spreading to the surrounding indoor space.

In addition, since the first and second front heat-blocking plates are provided so that they can be hingedly rotated relative to the first and second tray joint bodies or separated and joined through joint members, workers can more easily perform fire-retardant foam pad construction and cable laying work.

In addition, by providing a heat-expandable refractory foam sleeve inside the penetration hole, it is possible to facilitate the construction of a refractory filling to shield the penetration hole.

To elaborate, since the cable can be installed so that it is in close contact with the fire-resistant foam sleeve by the fire-resistant foam pad, even if the worker installs the fire-resistant foam pad in the forward area of the cable within the penetration hole of the fire-resistant foam sleeve, the fire-resistant foam pad and the fire-resistant foam sleeve wrap the cable in the circumferential direction, thereby enabling perfect fire-resistant shielding.

In addition, since an additional cable insertion section is provided, when additional cable installation is required after the cable laying work and fire-fighting foam pad installation work are completed, additional cables can be easily installed without dismantling the fire-fighting foam pad.

Figure 1 is a cross-sectional view showing the refractory filling construction structure inside a sleeve according to the prior art.
Figure 2 is a cross-sectional view showing a state in which a fireproof filling construction is performed using a sleeve assembly having a heat-insulating function according to an embodiment of the present invention.
Figure 3 is a front view showing a state in which a fireproof filling construction is performed using a sleeve assembly having a heat-insulating function according to an embodiment of the present invention.
FIG. 4 is a perspective view showing a state in which a cable tray is connected to a sleeve assembly having a heat-insulating function according to an embodiment of the present invention.
FIG. 5 is a perspective view showing a front plate in a sleeve assembly having a heat-insulating function according to an embodiment of the present invention;
FIG. 6 is an exploded perspective view showing a sleeve assembly having a heat-insulating function according to an embodiment of the present invention.
Fig. 7 is a perspective view of the combination of Fig. 6;
Figure 8 is a drawing showing a state in which the first and second front heat-blocking plates in Figure 7 are rotated outward;
FIG. 9 is a perspective view showing a first modified example of a tray joint of a sleeve assembly having a heat-insulating function according to an embodiment of the present invention;
Fig. 10 is a drawing showing a modified example of Fig. 4;
FIG. 11 is a perspective view showing a second modified example of a tray joint of a sleeve assembly having a heat-insulating function according to an embodiment of the present invention;
Figure 12 is a drawing showing a state in which rotation occurs around the hinge axis in Figure 11.
Figure 13 is a side view showing a state in which the tray coupling part of Figure 11 is installed in the sleeve and the upper and lower openings of the sleeve are closed.
FIG. 14 is a perspective view showing a third modified example of a tray joint of a sleeve assembly having a heat-insulating function according to an embodiment of the present invention.
Figures 15 to 20 are drawings sequentially showing a method for constructing a fireproof filling structure using a sleeve assembly having a heat-insulating function according to an embodiment of the present invention.
Figure 21 is a plan view after the construction method of a refractory filling structure using a sleeve assembly according to an embodiment of the present invention is completed.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and these embodiments are provided only to make the disclosure of the present invention complete and to fully inform a person having ordinary skill in the art of the scope of the invention. In the drawings, the same reference numerals refer to the same elements.

A sleeve assembly having a heat-insulating function according to a preferred embodiment of the present invention enables a worker to more easily and perfectly perform a shielding operation for fire-resistant filling of a penetration hole after installing a cable tray to be connected to a sleeve installed in a penetration hole provided in a floor or wall of a building. In particular, not only does it adopt a structure capable of blocking the heat generated by a fire from being transmitted to a surrounding indoor space, but also this heat-transmission blocking structure is permanently and sturdily maintained, thereby maximizing maintenance efficiency.

Hereinafter, the present invention will be described in detail with reference to examples.

As illustrated in FIGS. 2 to 4, a sleeve assembly (200, hereinafter, sleeve assembly) having a heat-insulating function according to an embodiment of the present invention is installed in a through hole (100) provided in a floor or wall of a building, and has a structure capable of connecting first and second cable trays (140, 150) to which cables (120) are fixed on the upper and lower sides, respectively.

In general, the sleeve is an open type sleeve that is opened in the upper and lower directions so that the cable tray can pass through it, and an integral sleeve that is connected through rails at the upper and lower ends without the cable tray passing through it. In the embodiment of the present invention, the sleeve body (212) of the sleeve assembly (200) described below corresponds to the latter, that is, an integral sleeve.

As illustrated in FIGS. 2 to 4, a sleeve assembly (200) according to an embodiment of the present invention includes a sleeve (210) embedded in a concrete structure, and a tray coupling portion (260) detachably coupled to the sleeve (210) and capable of coupling first and second cable trays (140, 150).

Here, the sleeve (210) may be formed as a rectangular frame shape with upper and lower penetrations using a metal plate, for example. In addition, the sleeve (210) may be applied as a fire-resistant foam sleeve having a fire-resistant foam function on its own, as another example.

In the following, the sleeve (210) is described based on the case where it is applied as a fire-resistant foam sleeve, for example, and the sleeve (210) is referred to as a fire-resistant foam sleeve (210).

First, the refractory foam sleeve (210) is embedded and fixed in a concrete structure, and a through hole (211) is formed so that a plurality of cables (120) fixed to the rungs of the first and second cable trays (140, 150) can penetrate the inside thereof.

The fire-resistant foam sleeve (210) includes a foam material that can expand by itself due to heat to shield the inside of the through hole (100), and can be manufactured through an injection molding process. Specifically, the fire-resistant foam sleeve (210) expands in a direction to close the through hole (100) due to the heat of a fire.

In an embodiment of the present invention, the fire-resistant foam sleeve (210) contains a thermal foam material itself, unlike a conventional metallic sleeve, so that, compared to the fire-resistant filling construction structure of a conventional sleeve, it can more effectively block flames or smoke from moving from one space to the other space through the penetration hole (100) in the event of a fire, which will be described in more detail later.

Specifically, as illustrated in FIGS. 3 and 4, the refractory foam sleeve (210) includes a sleeve body (212) and a plurality of sleeve protrusions (242).

First, the sleeve body (212) is formed with a through hole (211) and is formed in a through shape that is open at the top and bottom, is made of a foam material, is molded through injection, and is provided with a plurality of bolt through holes (213) on each side. In the embodiment of the present invention, since the sleeve body (212) is made of a thermal foam material that expands and foams by heat as described above, it expands by heat in the event of a fire, and can completely shield the through hole (100) of the floor or wall of a building, thereby blocking the spread of flames and smoke.

In an embodiment of the present invention, as illustrated in FIGS. 3 to 6, the sleeve body (212) may be integrally provided with at least one additional cable insertion portion (215) made of a foam material that expands and foams due to heat and has a preliminary through-hole (216) provided to allow an additional cable (121) to pass through in the vertical direction. That is, the additional cable insertion portion (215) is made of a foam material that expands and foams due to heat in the same manner as the sleeve body (212).

In the construction method described below, when the fire-retardant foam pad (400) is installed to close the penetration hole (100), i.e., the inner penetration hole (211) of the sleeve body (212), to block the propagation of flame and smoke, if it becomes necessary to additionally install an additional cable (121) in addition to the cables (120) fixed to the first and second cable trays (140, 150), this is provided so that this can be done without the process of separating and reinstalling the fire-retardant foam pad (400).

The additional cable insertion portion (215) is formed in a hollow tube shape with a preliminary through-hole (216) formed on the inside, and additional cables such as electric wires and communication wires can be inserted through the preliminary through-hole (216). Here, it is preferable that the upper portion of the additional cable insertion portion (215) protrudes upwards to a certain degree with respect to the upper surface of the fire-retardant foam pad (400) when the fire-retardant foam pad (400) is installed. Accordingly, the worker can more easily insert the additional cable (121) into the additional cable insertion portion when necessary. A related supplementary explanation will be provided later.

In an embodiment of the present invention, the additional cable insertion portion (215) is made of the same material as the sleeve body (212) and can be formed integrally during an injection molding process for manufacturing the sleeve body (212). That is, the sleeve body (212) and the additional cable insertion portion (215) are formed integrally through a single injection.

The additional cable insertion portion (215) has a spare penetration hole (216) formed on its inner side. If the spare penetration hole is not closed, there is a problem that it functions as a path for flame and smoke to spread in the event of a fire. However, since the additional cable insertion portion (215) is made of a material that can expand due to heat, just like the sleeve body (212), it can expand due to the heat of the fire, thereby closing the spare penetration hole (216), thereby blocking the spread of flame and smoke.

Additionally, when not inserting an additional cable into the spare through hole (216), the spare through hole (216) may be closed by applying a fireproof sealant or the like to the inside of the spare through hole (216), or the opening of the spare through hole (216) may be blocked by mounting a rubber cap (not shown) or the like on the top of the additional cable insertion portion (215).

In one embodiment of the present invention, the sleeve body (212) is formed in an overall square frame shape that penetrates upward and downward.

Specifically, as an example, as illustrated in FIG. 6, the sleeve body (212) includes a front plate (220), a rear plate (221), a left plate (222), and a right plate (223), and some of the plurality of plates are provided with separate flanges (240) for fixing and installing the sleeve body (212) to a formwork (not shown) for forming a floor or wall of a building in a construction method described below, and a bolt fastening hole is provided in the flange (240) so that a bolt may penetrate and be fastened for fixing to the formwork.

In contrast, in the embodiment of the present invention, the sleeve may be applied as a vertically penetrating structure by configuring front, rear, left, and right plates as described above, using metal plates instead of a refractory foam sleeve.

Below, the case where the sleeve body (212) is formed through injection molding using a refractory foam material is described again.

In an embodiment of the present invention, for example, the sleeve body (212) may be formed at once through a single injection process in the form in which the four plates described above are integrally connected, that is, a square frame-shaped structure having a through hole, and upon completion of the single injection, an additional cable insertion portion (215) is also integrally provided in the sleeve body (212). That is, the sleeve body (212) and the additional cable insertion portion (215) are integrally formed through a single injection.

As a modified example, the sleeve body may be fixed to the formwork in a state where the four plates described above are each manufactured through individual injection processes and then joined together as one piece through plate joining parts (not shown, groove/protrusion structure, bolt, etc.).

In the latter case, since four thin plates are individually injection-molded, the space occupied can be reduced compared to the former case, so there is an advantage in storage and transportation. The following is a supplementary explanation based on the former case, which is integrally injection-molded.

The front plate (220) is provided integrally with at least one additional cable insertion portion (215), and the rear plate (221) is spaced apart from the front plate (220) by a certain distance.

The left plate (222) is connected to one end of each of the front plate (220) and the rear plate (221), and the right plate (223) is connected to the other end of each of the front plate (220) and the rear plate (221).

In an embodiment of the present invention, a plurality of bolt through holes (213) are provided in each of the left plate (222) and the right plate (223), and these bolt through holes (213) are formed simultaneously when the sleeve body is injection molded.

Next, as shown in FIGS. 3 and 4, a plurality of sleeve protrusions (242) protrude from the outer surface of the sleeve body (212), specifically, the left plate (222) and the right plate (223), and are formed at positions corresponding to the bolt penetration holes (213), respectively.

A plurality of sleeve protrusions (242) are provided with a communication hole (243) to communicate with a plurality of bolt penetration holes (213), respectively, and a nut insertion groove (245) is provided on the outside, respectively. These sleeve protrusions (242) can be embedded in the concrete structure when pouring concrete and fixed by the concrete structure. As the sleeve protrusions (242) are fixed to the inside of the concrete in this way, the sleeve body (212) can be fixed to the concrete more stably.

Here, the cross-sectional shape of the nut insertion groove (245) is formed to correspond to the external shape of the nut (267) described later. Specifically, when the nut (267) is a hexagonal nut, the nut insertion groove (245) is also formed to have a hexagonal cross-sectional shape, and therefore, during the process of joining the bolt (250) and the nut (267) described later, the nut (267) can be prevented from rotating while inserted into the nut insertion groove (245), so that the worker can perform the bolt fastening work more easily. In addition, when the nut (267) is a square nut, the nut insertion groove (245) can be formed to have a square cross-sectional shape.

In an embodiment of the present invention, the sleeve body (212) and the plurality of sleeve protrusions (242) are made of the same foamable material and are integrally injection-molded through a single injection.

Below, the tray joint (260) is described in detail.

As shown in FIGS. 3, 4, 6 to 8, the tray joint (260) is made of a metal material and is detachably joined to the refractory foam sleeve (210), and the first and second cable trays (140, 150) are provided so that they can be joined, respectively.

In an embodiment of the present invention, the tray coupling part (260) includes a nut (267), a bolt (250), first and second tray coupling parts bodies (268, 269), and a plurality of heat-blocking plates (280).

The nut (267) is inserted into the nut insertion groove (245), and before pouring concrete, the worker inserts the nut (267) into the nut insertion groove (245).

The bolt (250) is connected to the sleeve body (212) by having its body portion pass through the bolt penetration hole (213) of the sleeve body (212) and being connected at one end to a nut (267) inserted into the nut insertion groove (245). The head portion of the bolt (250) is located in the inner region of the sleeve body (212).

That is, during the construction process, the sleeve body (212) is first fixed to the formwork, then the nut (267) is inserted into the nut insertion groove (245), and the bolt (250) is connected to the nut (267). The body part of the bolt has a length greater than a certain length so that it can sequentially penetrate the bolt penetration hole (213) and the connecting hole (243) and be connected to the nut (267).

Thereafter, concrete is poured into the formwork and the sleeve body (212) is embedded in the concrete structure formed by pouring and fixed. In this process, since the concrete is poured while the bolt (250) and the nut (267) are in a pre-bonded state as described above, the concrete does not fill the inside of the inner fastening hole of the nut (267). When the concrete curing is complete, the worker can loosen the bolt (250) to place the first and second tray coupling body (268, 269) at the corresponding positions of the sleeve body and then fasten the bolt (250) to the nut (267) again to fasten and fix the first and second tray coupling body (268, 269) to the sleeve body (212).

In an embodiment of the present invention, the first and second tray coupling bodies (268, 269) are respectively coupled to the left plate (222) and the right plate (223) of the sleeve body, are made of a metal material, and are arranged on both sides of the inner side of the sleeve body (212).

Specifically, the first and second tray joint bodies (268, 269) are positioned in a state of surface contact with the inner surfaces of the left plate (222) and the right plate (223), and a plurality of bolt insertion holes (262) are provided so that a plurality of bolts (250) can be inserted through them, and a plurality of screw fastening holes (265) in the shape of a long hole are provided so that they can be screw-connected to the first and second cable trays (140, 150), respectively.

First and second cable trays (140, 150) are connected to the upper and lower sides of the first and second tray joint bodies (268, 269), respectively, and are connected through separate bolts and nuts while positioned so that the screw fastening hole (265) and the fastening holes formed in the first and second cable trays pass through each other.

When explaining the process of joining the first and second tray joint bodies (268, 269) to the sleeve body (212), when concrete pouring and curing are completed, the worker releases and separates the bolt (250) that was pre-joined to the nut (267) before concrete pouring, and then positions the first and second tray joint bodies (268, 269) so that the bolt penetration hole (213) of the sleeve body (212) and the bolt insertion hole (262) of the first and second tray joint bodies (268, 269) are in communication with each other. Next, the body part of the bolt (250) on the inside of the sleeve main body (212) sequentially passes through the bolt insertion hole (262) of the first and second tray coupling body (268, 269), the bolt penetration hole (213) of the sleeve main body (212), and the communication hole (243) of the sleeve protrusion (242) so as to be fastened to the nut (267). Thereafter, the first and second cable trays are coupled to the upper and lower sides of the first and second tray coupling body (268, 269).

Next, as shown in FIGS. 6 to 8, a heat-blocking plate (280) is provided in multiple numbers at one of the longitudinal ends of the first and second tray joint bodies (268, 269) so as to cover the cable (120) exposed to the outside of the sleeve (210) in the circumferential direction.

In the related drawings, the heat blocking plate (280) is installed to cover the cable (120) exposed on the upper side of the sleeve (210) in the circumferential direction. However, if the sleeve (210) is installed on a horizontal wall of a building, the heat blocking plate may cover the cable exposed on one side based on the sleeve.

In a case where the cable (120) is installed in a vertically long manner as shown in the drawing, the heat blocking plate (280) can block, for example, heat generated in the lower layer (1st layer) and transferred to the upper layer (2nd layer) through the cable (e.g., copper wire) from being transmitted (heat radiation) around the upper layer (2nd layer).

To elaborate, in the case of a copper wire, since it has a certain level of thermal conductivity or higher, the high temperature fire heat generated in the lower layer can be transferred to the other side (upper layer) through the wire, but according to the present invention, since the heat blocking plate (280) is provided to cover the cable (120) in the circumferential direction, the heat conducted through the cable can be stably blocked from spreading to the indoor space around the upper layer (second floor).

As shown in FIGS. 6 to 8, the plurality of heat-blocking plates (280) include first and second rear heat-blocking plates (281, 282) and first and second front heat-blocking plates (283, 284).

Here, the first and second rear heat-blocking plates (281, 282) are respectively provided at the rear edge portions (upper portions) of the longitudinal ends (upper portions) of the first and second tray coupling bodies (268, 269) to cover the rear side of the cable (120) exposed to the outside (upper portion in the drawing) of the sleeve (210), i.e., the sleeve body (212).

In addition, the first and second front heat-blocking plates (283, 284) are respectively provided at the front edge portions (upper portions) of the longitudinal ends (upper portions) of the first and second tray coupling bodies (268, 269) to cover the front side of the cable (120) exposed to the outside (upper portion in the drawing) of the sleeve body (212).

Here, the first and second rear heat-blocking plates (281, 282) and the first and second front heat-blocking plates (283, 284) are formed in a plate shape having a width and length greater than a certain value, so as to effectively block heat conducted to the cable (120) from being transferred to the surroundings as described above.

Meanwhile, in the construction method described below, the fireproof foam pad (400) is constructed to fill the inner empty space of the sleeve body (212) in front of the cable (120), so that the first and second rear heat-insulating plates (281, 282) do not provide any particular inconvenience or hindrance to the worker in the process of constructing the fireproof foam pad (400). To elaborate, this is because the present invention can provide a sufficient fireproof filling effect even if the fireproof foam pad (400) is not filled in the rear of the cable (120), but is filled only in the front side of the cable, as described below.

Accordingly, the first and second rear heat-blocking plates (281, 282) may be fixed so as not to rotate relative to the rear edge portion of the upper portion of the first and second tray coupling body (268, 269).

However, in the construction method described below, the fire-retardant foam pad (400) is constructed to fill the inner empty space of the front sleeve body (212) of the cable (120), so the first and second front heat-insulating plates (283, 284) may cause inconvenience or hindrance to the worker during the process of installing the fire-retardant foam pad (400) and laying the cable.

The present invention provides a structure that can prevent inconvenience and difficulty in installing a fire-retardant foam pad due to the first and second front heat-blocking plates (283, 284) during the process of installing the fire-retardant foam pad by a worker.

For example, as illustrated in FIGS. 6 to 8, the first and second front heat-blocking plates (283, 284) may be hinge-rotatably coupled to the first and second tray coupling bodies (268, 269). Here, the first and second front heat-blocking plates (283, 284) are rotatably coupled via a hinge axis (285), and the rotational allowance angle may be freely rotated within a range of 270 degrees.

In this case, when the hinge rotation joint structure is applied, when the worker wants to install the fire-fighting foam pad (400), he/she can easily proceed with the fire-fighting foam pad installation work by opening the front side of the cable (120) by folding the first and second front heat-blocking plates (283, 284) outward (one side) with respect to the sleeve body (212) (see FIG. 17).

Next, when the installation of the fire-retardant foam pad (400) is completed, the worker folds the first and second front heat-blocking plates (283, 284) inward (the other side) with respect to the sleeve body (212) to cover the front side of the cable (120), thereby preventing heat conducted to the cable in the event of a fire from being transferred to the front indoor space by the first and second front heat-blocking plates (283, 284) as described above.

As another example, as illustrated in FIG. 9, the first and second front heat-blocking plates (283, 284) can be detachably coupled to the first and second tray coupling bodies (268, 269) via a coupling member (286).

Specifically, a flange (287b) having a first fastening hole (287a) formed therein is provided at the front end of the first and second tray coupling body bodies (268, 269), and a second fastening hole (287c) is formed at a position corresponding to the first fastening hole (287a) at the first and second front heat-blocking plates (283, 284). After the first and second fastening holes are arranged in approximately a single row, a fastening member (286) is fastened so as to penetrate all of them, so that the first and second front heat-blocking plates (283, 284) can be integrally fastened to the end of the first and second tray coupling body bodies (268, 269). Here, the fastening member (286) can be applied as a bolt, a pin, or the like.

In this case, when a detachable structure by means of a connecting member (286) is applied, when a worker wants to install a fire-retardant foam pad (400), he/she can easily proceed with the fire-retardant foam pad installation work by separating the first and second front heat-insulating plates (283, 284) from the sleeve body (212) and opening the front side of the cable (120).

Meanwhile, the related drawings illustrate a case in which the first and second front heat-blocking plates (283, 284) are provided separately, but are not necessarily limited to this.

That is, in order to cover the front side of the cable (120) exposed to the outside (upper side in the drawing) of the sleeve body (212), the front heat-blocking plate may be formed as one piece rather than being separated into two pieces, and one front heat-blocking plate (not shown) may be joined to the front edge portion of one longitudinal end (upper end) of the first and second tray coupling body (268, 269) via a joining member (286) so that both ends can be separated.

At this time, one front heat-blocking plate (not shown) may include a flame-retardant or non-combustible material other than a metal material, and specifically may include a flame-retardant or non-combustible plastic material.

Alternatively, a single front heat-insulating plate (not shown) may be formed to include a metal plate (not shown) made of a metal material and a flame-retardant insulating material provided (attached, etc.) on the inner surface of the metal plate (not shown) made of a metal material facing the cable. Here, the flame-retardant insulating material can be applied in various forms, such as a ceramic or a foam-type flame-retardant insulating material.

Next, when the installation of the fire-retardant foam pad (400) is completed, the worker covers the front side of the cable (120) by connecting the first and second front heat-blocking plates (283, 284) to the first and second tray joint bodies (268, 269) using the connecting member (286), so that, as described above, when a fire occurs, the heat conducted to the cable is blocked by the first and second front heat-blocking plates (283, 284) and prevented from being transferred to the front indoor space.

Below, various structures that can more efficiently block heat conducted by the cable as described above from being transferred to the front indoor space due to the first and second front heat-blocking plates (283, 284) are additionally described.

In an embodiment of the present invention, as an example, as illustrated in FIG. 7, when the first and second rear heat-blocking plates (281, 282) and the first and second front heat-blocking plates (283, 284) are installed facing each other with respect to the first and second tray coupling body (268, 269), respectively, the protruding end of the first rear heat-blocking plate (281) protruding from the first tray coupling body (268) and the protruding end of the second rear heat-blocking plate (282) protruding from the second tray coupling body (269) are configured to be in contact with each other.

In addition, the protruding end of the first front heat-blocking plate (283) protruding from the first tray coupling body (268) and the protruding end of the second front heat-blocking plate (284) protruding from the second tray coupling body (269) are formed to be in contact with each other.

That is, the first and second rear heat-blocking plates (281, 282) and the first and second front heat-blocking plates (283, 284) are arranged to surround the cable (120) exposed to the upper side of the sleeve body (212) without any gaps in the circumferential direction. Accordingly, the first and second rear heat-blocking plates (281, 282) and the first and second front heat-blocking plates (283, 284) can block the heat conducted to the cable from propagating to the front, rear, and side of the cable as efficiently as possible.

In an embodiment of the present invention, as another example, as illustrated in FIG. 10, when the first and second rear heat-blocking plates (281, 282) and the first and second front heat-blocking plates (283, 284) are installed facing each other with respect to the first and second tray coupling body (268, 269), respectively, the protruding end of the first rear heat-blocking plate (281) protruding from the first tray coupling body (268) and the protruding end of the second rear heat-blocking plate (282) protruding from the second tray coupling body (269) are formed such that a distance (d) less than a set distance is formed between them.

In addition, the protruding end of the first front heat-blocking plate (283) protruding from the first tray coupling body (268) and the protruding end of the second front heat-blocking plate (284) protruding from the second tray coupling body (269) are formed so that a distance (d) less than the set distance is formed between them.

That is, the first and second rear heat-blocking plates (281, 282) and the first and second front heat-blocking plates (283, 284) are arranged to surround the cable (120) exposed to the upper side of the sleeve body (212) with a minimum gap formed in the circumferential direction. Accordingly, the first and second rear heat-blocking plates (281, 282) and the first and second front heat-blocking plates (283, 284) can block the heat conducted to the cable from propagating to the front, rear, and side of the cable as efficiently as possible.

This separation distance (d) is applied to a distance that can sufficiently block peripheral propagation of heat conducted by the cable without restricting the up-and-down rotation of the upper coupling body (312) of each of the first and second tray coupling body (268, 269) described below.

In an embodiment of the present invention, the set distance may be applied as 1 to 10 mm. If the set distance is less than 1 mm, the upper joint body (312) of each of the first and second tray joint body (268, 269) described later may be caught or come into contact with each other, making it difficult to freely rotate up and down with respect to the central joint body (310).

In addition, if the set distance exceeds 10 mm, there is a disadvantage in that heat conducted through the cable may be transferred to the outside through the gap between the protruding end of the first front heat blocking plate (283) and the protruding end of the second front heat blocking plate (284), thereby reducing the heat blocking efficiency.

Of course, when the upper coupling body (312) of each of the first and second tray coupling body (268, 269) is rotated downward toward the sleeve body (212), the first and second rear heat-blocking plates (281, 282) and the first and second front heat-blocking plates (283, 284) may be arranged to overlap each other with their ends misaligned by a certain amount or more so as not to restrict the up-and-down rotation of the upper coupling body (312). Here, the 'misaligned state' means that the distance between the first rear heat-blocking plate (281) and the second rear heat-blocking plate (282) with respect to the side surface of the sleeve body (212) is different, and the same applies to the first and second front heat-blocking plates.

In a modified example of the present invention, as shown in FIGS. 11 to 14, the first and second tray coupling body bodies (268a, 269a) may each include a central coupling body body (310), an upper coupling body body (312), and a lower coupling body body (314).

The central joint body (310) is detachably fixedly connected to the sleeve (210) through a bolt (250) and a nut (267).

The upper joint body (312) is hinge-rotatably coupled to the upper side of the central joint body (310) so as to be able to close the upper opening of the sleeve body (212), and a plurality of heat-blocking plates are provided at both ends in the width direction thereof. That is, a first rear heat-blocking plate (281) and a first front heat-blocking plate (283) are provided on the upper joint body (312) of the first tray joint body (268). In addition, a second rear heat-blocking plate (282) and a second front heat-blocking plate (284) are provided on the upper joint body (312) of the second tray joint body (269).

Here, the first front heat-blocking plate (283) and the second front heat-blocking plate (284) may be hinge-rotatably connected to one edge end of the upper joint body (312) as described above, or may be detachably connected through a separate connecting member (286).

The lower joint body (314) is hinge-rotatably connected to the lower side of the central joint body (310) so as to be able to close the lower opening of the sleeve body (212).

In an embodiment of the present invention, when it is necessary to seal (close) the inside of the sleeve body (212) from the outside, for example, when it is necessary to prevent concrete mortar or other foreign substances from flowing into the inside of the sleeve body during construction, the upper and lower openings of the sleeve body (212) are covered and sealed.

Hereinafter, a method for constructing a sleeve assembly having a heat-insulating function according to an embodiment of the present invention (hereinafter referred to as the “construction method”) will be described, and the tray joint will be illustrated and described based on the structure illustrated in Fig. 6. However, the invention is not limited thereto, and the tray joint structures illustrated in Figs. 9, 11, and 14 can also be applied in the same manner.

As illustrated in FIGS. 15 to 20, a construction method according to an embodiment of the present invention is a method for installing a sleeve assembly (200) in a through-hole (100) provided in a floor or wall of a building, then installing first and second cable trays (140, 150), completing cable laying work, and then shielding the through-hole (100), i.e., the inner through-hole of the sleeve body, to block flames and smoke caused by a fire from spreading from one area to another area based on the sleeve assembly (200).

In addition, this is a method for blocking heat conducted from one area to the other area through a cable based on the sleeve assembly (200) from being transferred to the surrounding indoor space of the other area. (By a heat blocking structure using a heat blocking plate)

A construction method according to an embodiment of the present invention includes a fire-resistant foam sleeve fixing step (S100), a concrete pouring step (S200), a tray joint first installation step (S300), a first and second cable tray and cable installation and fixing step (S400), a fire-retardant foam pad installation step (S500), and a tray joint second installation step (S600).

First, as illustrated in FIG. 15, the refractory foam sleeve (210) of the sleeve assembly (200) for connecting the first and second cable trays (140, 150) is fixed to the formwork for forming the floor or wall of the building (S100). In step S100, the refractory foam sleeve (210) is fixedly connected to the formwork using bolts or the like. At this time, the sleeve body (212) has a bolt (250) and a nut (267) connected to each other. Therefore, it is possible to prevent concrete from flowing into the inner fastening hole of the nut (267) during the concrete pouring step described later.

Meanwhile, although not specifically shown in the drawing, at step S100, a tray joint (260a) may be additionally installed on the refractory foam sleeve (210).

In this way, when the tray coupling part (260a) is installed at step S100, the tray coupling part (260a) has a structure having a central coupling part main body (310), an upper coupling part main body (312), and a lower coupling part main body (314), as illustrated in FIGS. 11 and 14. At step S100, although not specifically illustrated in the drawing, the tray coupling part (260a) is installed in a state where the upper coupling part main body (312) and the lower coupling part main body (314) are rotated to close the upper and lower openings of the refractory foam sleeve (210), thereby preventing the concrete poured at step S200, which will be described later, from flowing into the refractory foam sleeve (210).

However, if the tray joint has the structure illustrated in FIG. 6 and FIG. 9 that does not have the central joint body (310), the upper joint body (312), and the lower joint body (314), the tray joint is not installed at step S100. In the following description and related drawings, for convenience of explanation and illustration, the description and illustration are based on the case where the tray joint does not have the central joint body (310), the upper joint body (312), and the lower joint body (314) and has a structure having a heat-blocking plate.

Next, as shown in Fig. 16, by pouring concrete and curing it, the front (one side) portion of the sleeve protrusion (242) and the nut (267) facing outward are embedded in the concrete structure and fixed by the concrete structure, and a through hole (100) that functions as a passage for a cable to pass through in the vertical direction is formed (S200).

Next, as shown in Fig. 17, the tray joint (260) is joined to the refractory foam sleeve (210). Specifically, after the bolt (250) is disengaged from the nut (267), the first and second tray joint bodies (268, 269) are again joined and fixed to the refractory foam sleeve (210) using the bolt (250) and nut (267) (S300).

As described above, the nut (267) is inserted into the nut insertion groove (245) and one side is fixed by concrete to prevent rotation, so that the worker can perform the bolt (250) fastening work more quickly and easily.

In addition, at step S300, the first and second front heat-blocking plates (283, 284) are in a state in which they are tilted outward with respect to the first and second tray coupling bodies (268, 269) (if a hinge-rotation coupling structure is applied) or in a state in which they are coupled and separated from the first and second tray coupling bodies (268, 269) (if a detachable coupling structure is applied via a coupling member).

In contrast, the first and second rear heat-blocking plates (281, 282) are installed integrally connected to the first and second tray joint bodies (268, 269).

Next, as illustrated in FIG. 18, first and second cable trays (140, 150) are connected by connecting them to the upper and lower sides of the tray joint (260) using bolts, nuts, etc., respectively, and a plurality of cables (120) are fixed to the first and second cable trays (140, 150) so as to penetrate the inside of the fire-resistant foam sleeve (210) (S400). Here, cables (120), such as electric wires and communication wires, can be fixed to the rungs of the cable tray using cable ties, etc. In addition, the cables are fixed to the cable tray using cable ties, etc. after the cable tray is installed first.

Next, as illustrated in Fig. 19, a fireproof foam pad (400) is installed at least once inside the fireproof foam sleeve (210) to block the through hole (100), i.e., the inner through hole (211) area of the fireproof foam sleeve (210) (S500).

Specifically, the fireproof foam pad (400) can be installed in the through hole (211) of the fireproof foam sleeve (210) so that the cable (120) and additional cable insertion portion (215) placed in the through hole (100) do not interfere with the installation work of the fireproof foam pad (400), and the through hole can be covered (sealed) with the fireproof foam pad (400).

The fire-retardant foam pad (400) is intended to substantially shield the penetration hole (211) of the fire-resistant foam sleeve (210), and must be designed so that the penetration hole (211) is not completely shielded due to interference from the cable (120) and additional cable insertion portion (215).

To this end, in the embodiment of the present invention, the fire-retardant foam pad (400) may be formed in a form having a certain degree of flexibility or higher, and may have, for example, a form of sponge, and is inserted in a compressed state inside the through hole (211) to reliably shield the through hole. This fire-retardant foam pad (400) has a characteristic of expanding in the same manner as the sleeve body (212) when the temperature rises in the event of a fire as a fire-resistant filling structure.

To elaborate, when a fire occurs in a space on one side based on the floor or wall, the fire-retardant foam pad (400) receives heat and expands to maintain a state of more firmly closing the penetration hole (100), i.e., the penetration hole (211), thereby preventing flames and smoke from spreading to the other space. This fire-retardant foam pad (400) has the characteristics of a shape and structure that elastically contracts when a worker applies a certain amount of compressive force.

After the fireproof foam pad (400) is installed to cover the penetration hole (211), a fireproof sealant (not shown) or the like may be provided for sealing between the fireproof foam pad (400) and the inner surface of the fireproof foam sleeve (210) that come into contact with each other.

In this way, the fire-retardant foam pad (400) has elastic compression and restorable properties above a certain level, so that it can be stably closed as a whole without being partially closed by interference from the cable (120) or additional cable insertion portion (215), i.e., the through hole (100), i.e., the through hole (211).

In an embodiment of the present invention, at step S500, as illustrated in FIG. 19, a worker compresses a fire-retardant foam pad (400) and inserts it into a fire-resistant foam sleeve (210), and the fire-retardant foam pad (400) presses a plurality of cables (120) backwards so that the rear side of the cables (120) is in close contact with a fire-retardant foam sleeve (210) made of a thermal foam material, specifically, a sleeve body (212).

In addition, as illustrated in FIG. 21, as the cable (120) is pressed against the sleeve body (212) by the fire-retardant foam pad (400), the fire-retardant foam pad (400) and the sleeve body (212), specifically the rear plate (221), are formed in a form in which the cables (120) are wrapped in the circumferential direction while pressed against the plurality of cables (120).

By this installation, the fire-retardant foam pad (400) and the sleeve body (212) can completely shield the penetration hole (100) of the floor or wall without interference from cables, etc., thereby reliably blocking the spread of flame and smoke.

In addition, at step S500, at least one additional cable insertion portion (215) is formed in a form that protrudes upward by a certain amount based on the fire-retardant foam pad (400). Accordingly, if additional installation of an additional cable (121) is required, a worker can easily insert the additional cable (121) from the upper side to the lower side or from the lower side to the upper side without dismantling the already installed fire-retardant foam pad (400). Meanwhile, if additional installation of an additional cable (121) is not required, the insertion hole of the auxiliary cable insertion portion can be blocked with a fire-retardant sealant or the like by applying a fire-retardant sealant to the opening portion of the additional cable insertion portion (215) or by combining a rubber cap or the like.

Next, as illustrated in FIG. 20, the first and second front heat-blocking plates (283, 284) are rotated inwardly relative to the first and second tray coupling bodies (268, 269) (if a hinge-rotation coupling structure is applied) or coupled to the first and second tray coupling bodies (268, 269) via a coupling member (286) (if a detachable coupling structure is applied via a coupling member) (S600).

Accordingly, the cable (120) exposed to the upper side of the sleeve has its circumferential direction covered by the first and second tray joint bodies (268, 269), the first and second front heat-blocking plates (283, 284), and the first and second rear heat-blocking plates (281, 282). Accordingly, as described above, heat transferred to the cable (120) by fire can be blocked from being transferred to the surrounding space by the first and second tray joint bodies (268, 269), the first and second front heat-blocking plates (283, 284), and the first and second rear heat-blocking plates (281, 282).

While the present invention has been illustrated and described with reference to preferred embodiments for illustrating the principles of the present invention, the present invention is not limited to the exact construction and operation as illustrated and described. Rather, it will be readily apparent to those skilled in the art that numerous changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims.

10: Sleeve 20: Cable Tray
40: Fire Foam Pad
50: Cable 100: Through hole
120: Cable 121: Additional Cable
140: 1st cable tray 150: 2nd cable tray
200: Sleeve assembly 210: Fire-resistant foam sleeve
211: Through hole 212: Sleeve body
213: Bolt through hole 215: Additional cable insertion hole
220: Front plate 221: Back plate
222: Left plate 223: Right plate
242: Sleeve protrusion 243: Flue hole
245: Nut insertion hole 250: Bolt
260, 260a: Tray joint 267: Nut
268,268a: First tray joint body
269,269a: Second tray joint body
280: Heat-insulating plate 281: First rear heat-insulating plate
282: 2nd rear heat shield plate
283: First front heat shield plate
284: 2nd front heat shield plate
286: Joint member 310: Central joint body
312: Upper joint body 314: Lower joint body
400: Fire Foam Pad

Claims (13)

It is installed in a penetration hole provided in the floor or wall of a building and has a structure capable of connecting first and second cable trays to which cables are fixed on the upper and lower sides, respectively.
A sleeve embedded in a concrete structure and having a through hole formed therein so that a plurality of cables fixed to the first and second cable trays pass through the inside; and
A tray joint portion is included, which is detachably coupled to the sleeve and to which the first and second cable trays are respectively coupled.
The above tray joint is,
First and second tray joint bodies, each detachably joined to opposite sides of the sleeve; and
Including a plurality of heat-blocking plates provided at one of the longitudinal ends of the first and second tray joint bodies so as to cover the cable exposed to the outside of the sleeve in the circumferential direction,
A sleeve assembly having a heat-insulating function, characterized in that the sleeve is a fire-resistant foam sleeve including a foam material that can expand and foam by heat to shield the inside of the penetration hole. In the first paragraph,
The above multiple heat-blocking plates are,
First and second rear heat-blocking plates respectively provided at the rear edge portions of the longitudinal ends of the first and second tray joint bodies to cover the rear side of the cable exposed to the outside of the sleeve; and
A sleeve assembly having a heat-insulating function, characterized in that it includes first and second front heat-insulating plates respectively provided at front edge portions of one longitudinal end of the first and second tray coupling bodies to cover the front side of the cable exposed to the outside of the sleeve. In the second paragraph,
A sleeve assembly having a heat-insulating function, characterized in that the first and second rear heat-insulating plates are fixed so as not to rotate relative to the first and second tray coupling bodies, and the first and second front heat-insulating plates are hinge-rotatably coupled relative to the first and second tray coupling bodies. In the second paragraph,
A sleeve assembly having a heat-insulating function, characterized in that the first and second rear heat-insulating plates are fixed non-rotatably to the first and second tray coupling bodies, and the first and second front heat-insulating plates are detachably coupled to the first and second tray coupling bodies via a coupling member. In the first paragraph,
The above multiple heat-blocking plates are,
First and second rear heat-blocking plates respectively provided at the rear edge portions of the longitudinal ends of the first and second tray joint bodies to cover the rear side of the cable exposed to the outside of the sleeve; and
A sleeve assembly having a heat-insulating function, characterized in that it includes one front heat-insulating plate that is detachably connected to the front edge portion of each of the longitudinal ends of the first and second tray coupling bodies through a connecting member so as to cover the front side of the cable exposed to the outside of the sleeve. In paragraph 5,
The above one front heat-blocking plate,
Made of flame retardant or non-flammable plastic material, or
A sleeve assembly having a heat-insulating function, characterized by including a metal plate made of a metal material and a flame-retardant insulating material provided on an inner surface of the metal plate made of the metal material facing the cable. In any one of the second to fourth paragraphs,
Based on the state in which the first and second rear heat-blocking plates and the first and second front heat-blocking plates are installed facing each other based on the first and second tray joint bodies,
The protruding end of the first rear heat-blocking plate protruding from the first tray coupling body and the protruding end of the second rear heat-blocking plate protruding from the second tray coupling body are in contact with each other,
A sleeve assembly having a heat-insulating function, characterized in that the protruding end of the first front heat-insulating plate protruding from the first tray coupling body and the protruding end of the second front heat-insulating plate protruding from the second tray coupling body are in contact with each other. In any one of the second to fourth paragraphs,
Based on the state in which the first and second rear heat-blocking plates and the first and second front heat-blocking plates are installed facing each other based on the first and second tray joint bodies,
The protruding end of the first rear heat-blocking plate protruding from the first tray coupling body and the protruding end of the second rear heat-blocking plate protruding from the second tray coupling body are separated from each other by a distance less than the set distance.
A sleeve assembly having a heat-insulating function, characterized in that a protruding end of the first front heat-insulating plate protruding from the first tray coupling body and a protruding end of the second front heat-insulating plate protruding from the second tray coupling body are formed with a distance less than a set distance between them. In Article 8,
A sleeve assembly having a heat-insulating function, characterized in that the above-mentioned setting distance is 1 to 10 mm. In any one of claims 1 to 6,
The first and second tray joint bodies are respectively,
A central joint body fixed to the above sleeve;
An upper joint body that is hinge-rotatably connected to the upper side of the central joint body so that the upper opening of the sleeve can be closed, and has a plurality of heat-blocking plates provided at both ends in the width direction thereof; and
A sleeve assembly having a heat-insulating function, characterized by including a lower coupling body that is hinge-rotatably coupled to the lower side of the central coupling body so as to be able to close the lower opening of the sleeve. delete In the first paragraph,
The above refractory foam sleeve,
A sleeve body formed in a through-hole shape with upper and lower openings and formed by injection molding using the foam material; and
A sleeve assembly having a heat-insulating function, characterized in that it includes a plurality of sleeve protrusions that protrude from the outer surface of the sleeve body in multiple ways, each of which has a communication hole provided to communicate with a plurality of bolt penetration holes formed on each side of the sleeve body, and a nut insertion groove provided on the outer side, and which can be embedded in the concrete structure and fixed by the concrete structure when concrete is poured. In Article 12,
A sleeve assembly having a heat-insulating function, characterized in that the sleeve is integrally provided with at least one additional cable insertion portion made of a foamable material that is expanded and foamed by the same heat as the sleeve body and has a preliminary through-hole provided to allow an additional cable to pass through in the vertical direction.

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