JP4015155B2 - Fireproof filler holder for hollow wall penetrations - Google Patents

Description

  The present invention relates to a fireproof filler holder that is installed for fireproofing in a portion where a flammable long body (cable, resin pipe, heat insulation piping, etc.) penetrates a fireproof hollow wall.

  At the part where the flammable elongate body penetrates the hole formed in the wall of the building, a refractory filler is filled around the flammable elongate body in the hole to prevent the flammable elongate body from spreading. Yes. Conventionally, in order to hold the refractory filler filled in the hole at a predetermined position, a metal fitting as shown in FIG. 12 is used. The metal fitting 10 is formed by bending a single metal wire to form a substantially hexagonal bottom frame portion 12, a pair of rising portions 14, and a pair of hook portions 16 (FIG. 2 of Patent Document 1). reference).

  This metal fitting 10 is used as shown in FIG. That is, the bottom frame portion 12 and the rising portion 14 are located in the hole 20 at a location where the cable 22 penetrates the hole 20 formed in the wall 18 of the building, for example, and the hook portion 16 is hooked on the edge of the hole 20. (In the example shown in the figure, the two metal fittings 10 are installed orthogonally). If, for example, a soft block-shaped fireproof filler 24 is filled around the cable 22 in the hole 20 in this state, a fireproof process can be easily applied to the cable penetration portion. The catch 10 serves to prevent the refractory filler 24 from being pulled out to the back side when or after the hole 20 is filled with the refractory filler 24.

  FIG. 13 shows the case where the wall 18 is solid (concrete wall or the like), but in recent years, a hollow wall constructed by using lightweight steel frames as pillars and attaching fireproof boards such as gypsum boards on both sides as partitions in a building. (Partition walls) are widespread. This hollow wall has fire resistance, has the advantage of being easy to construct and cheap.

  When a hole is formed in such a hollow wall and a cable or the like is passed therethrough, the metal sleeve as shown in FIG. 14 cannot be held by the metal fitting 10 as shown in FIG. 12 alone. 26 is used. In FIG. 14, 28 is a hollow wall composed of two wall plates 28A and 28B (one wall plate is usually made of two gypsum boards), and 30 is a portion through which the cable of the hollow wall 28 penetrates. It is a hole formed in. The sleeve 26 is inserted into the hole 30 so as to straddle the two wall plates 28 </ b> A and 28 </ b> B of the hollow wall 28. Even when a cable or the like is passed through the hole 30 in advance, the sleeve 26 is divided in the axial direction so as to be able to be inserted into the hole 30 so as to surround the cable or the like. After the sleeve 26 is installed as shown in FIG. 14, the receiving metal fitting 10 is set in the sleeve 26 similarly to FIG. 13, and the fireproof filler 24 is filled. Thus, if the sleeve 26 is used, the fireproof filler can be held in the hole of the hollow wall.

JP 2004-68317 A

  In the conventional structure for holding a refractory filler in a hollow wall penetrating portion, a metal sleeve is used and its inner surface is smooth. When moved to the filling port side, the refractory filler may also move with the combustible elongate body. When the refractory filler moves within the sleeve, it leads to a reduction in fire protection performance.

  In addition, the conventional refractory filler fitting has a structure that receives the refractory filler with a substantially hexagonal bottom frame made of metal wire, so the area for receiving the refractory filler is not sufficient, and the refractory filler is on the back side. There is a risk of sticking out.

  An object of the present invention is to provide a refractory filler holder for a hollow wall penetrating portion that can control the movement of the refractory filler filled in the hollow wall penetrating portion and more reliably maintain the fireproof performance.

In order to achieve this object, the present invention provides a refractory fire inserted through a hole in a hollow wall through which a combustible elongated body passes so as to surround the combustible elongated body and filled around the combustible elongated body. In the fireproof filler holder of the hollow wall penetrating portion provided with a sleeve for holding the outer peripheral surface of the filler,
Formed on the inner peripheral surface of the sleeve is a displacement preventing portion that restricts a member in contact with the surface from shifting in the axial direction,
Other prior Symbol sleeve, further comprising a retainer member for pressing the end face of the refractory filler is filled around the combustible long body,
The presser metal fitting is formed by bending a metal wire having spring elasticity into a star shape, and the diameter of the circumscribed circle of each top portion in a released state not subjected to external force is larger than the inner diameter of the sleeve. By twisting the whole in a direction where both ends of the metal wire cross each other against the elastic repulsive force of the wire, the diameter of the circumscribed circle of each top can be reduced to the size that fits into the sleeve,
When the presser fitting is put into the sleeve in a reduced diameter state and released within the sleeve, each apex abuts against the displacement preventing portion of the inner peripheral surface of the sleeve by elastic repulsion, and the movement of the presser fitting in the axial direction is restricted. It is characterized by being adapted.

The fireproof filler holder according to the present invention further includes a receiving metal fitting for receiving the end surface of the fireproof filler material on the side opposite to the filling port, in addition to the sleeve and the holding metal fitting. ,
The presser fitting is installed in the sleeve so as to press the end face on the filling port side of the refractory filler, so that each top part comes into contact with the slip preventing part of the inner peripheral surface of the sleeve so that the movement in the axial direction is restricted. It may be what is.

  Further, in the fireproof filler holder according to the present invention, the slip prevention portion of the inner peripheral surface of the sleeve where the presser fitting is installed is configured by a circumferential groove in which each top of the presser fitting falls. It is preferable.

  The stopper is embossed on the metal plate that forms the sleeve, or the inner peripheral surface of the sleeve is roughened like a file surface, or an adhesive tape is attached to the inner peripheral surface of the sleeve. Although it can be formed, it is particularly preferable to form the groove in the circumferential direction. A plurality of circumferential grooves are preferably formed in a ring shape, but may be formed in a spiral shape.

  In the fireproof filler holder according to the present invention, the sleeve is composed of two semi-cylindrical members, and when the two semi-cylindrical members are combined in a sleeve shape and installed in the hole of the hollow wall, both ends in the circumferential direction are provided. It is preferable that the portions have a perimeter that only overlaps each other.

  The refractory filler holder according to the present invention comprises a sleeve in which a single metal plate is formed in a cylindrical shape, and the metal plate has both ends in the circumferential direction when the sleeve is installed in a hole in a hollow wall. The part may have a perimeter that only overlaps each other.

  According to the present invention, since the slip prevention portion is formed on the inner surface of the sleeve installed in the hollow wall penetrating portion, the refractory filler filled in the sleeve or the pressing metal fitting installed in the sleeve is axially And the fireproof performance of the hollow wall penetrating portion can be reliably maintained.

  In addition, by combining the sleeve formed with the stopper and the star-shaped pressing bracket, the pressing bracket can be easily installed at a predetermined position in the sleeve, and the filling work of the fireproof filler can be performed efficiently. The refractory filler filled in the sleeve can be more securely held in place.

  In addition, the combination of the sleeve having the stopper portion, the star-shaped pressing metal fitting, and the conventional receiving metal fitting can hold the refractory filler in the sleeve more reliably.

  In addition, when combining a sleeve with a stopper and a star-shaped retainer, if the slip stopper formed on the inner peripheral surface of the sleeve is in the form of a circumferential groove, the elastic repulsive force of the retainer Thus, the top of the star shape falls into the groove, and the movement of the pressing metal in the axial direction can be surely prevented, and the fireproof filler can be more securely held at a predetermined position.

  The sleeve can also be composed of one cylindrical body, but if it is composed of two semi-cylindrical members, the flammable elongated body inserted into the hole of the hollow wall from the two semi-cylindrical members from both sides. Since the sleeve can be assembled so as to enclose it, the installation work of the sleeve can be facilitated, and the space for storing and transporting the sleeve can be saved.

Embodiment 1 FIG. 1 shows an embodiment of a sleeve constituting a fireproof filler holder according to the present invention. The sleeve 26 is configured by combining two semi-cylindrical members 32 as shown in FIG.

  The semi-cylindrical member 32 is formed by forming a metal plate into a semi-cylindrical shape and forming a plurality of circumferential grooves 34 (three in the illustrated example) in the vicinity of both axial ends of the inner peripheral surface thereof. is there. The groove 34 is formed by bending the metal plate outward. As will be described later, these grooves 34 serve as stoppers for the star-shaped presser fitting. Also, fixing pieces 36A and 36B with screw holes are integrally formed at both ends of the semi-cylindrical member 32 in the axial direction. One fixed piece 36A is formed on one end side in the circumferential direction and is bent at a right angle on the outer peripheral surface side, and the other fixed piece 36B is formed on the other end side in the circumferential direction and extends in the axial direction.

  In the released state where no external force is applied, the semi-cylindrical member 32 has an outer diameter that is slightly larger than the inner diameter of the hole formed in the two wall plates of the hollow wall. If it installs in, it will come to be pressed against the inner peripheral surface of a hole with an elastic repulsive force. In addition, the semi-cylindrical member 32 has a circumferential length that allows both ends in the circumferential direction to overlap each other when the two are combined in a sleeve shape and installed in the hole of the hollow wall. In FIG. 1, L shows the overlapping part of the both ends of the circumferential direction when two semi-cylindrical members 32 are combined in a sleeve shape and installed in the hole of the hollow wall.

Next, FIG. 3 shows an embodiment of a fireproof filler presser fitting that constitutes a fireproof filler holder together with the sleeve 26 of FIG. The pressing metal 38 is formed by bending a single metal wire 40 having spring elasticity into a star shape. As the metal wire 40, it is preferable to use a stainless steel wire having spring elasticity. Reference numeral 42 denotes five star-shaped top portions, and 44 denotes five star-shaped sides (portions crossing every other top portion 42). The metal wire 40 is bent so that both ends thereof are located at one of the five top portions 42. Both ends of the metal wire 40 are rounded to prevent an operator from being injured and a cable or the like from being damaged. The metal wire 40 is bent so that each star-shaped side 44 is curved outward. The star-shaped retainer member 38 has a diameter D ₁ of the circumscribed circle of the top 42 of five in a released state in which no external force is applied is greater than the inner diameter D ₃ of the installed sleeve in a bore of the hollow wall _(see FIG. 5) It is formed to become.

Since this holding metal fitting 38 is also a helical body in which the metal wire 40 is wound twice around the center axis of the star shape, as shown in FIG. twisting the entire direction) tightening, the diameter of the circumscribed circle of apexes 42, can be reduced in diameter to a size D ₂ entering the installed sleeve in a bore of the hollow wall.

  Note that both ends of the metal wire 40 can be positioned in the middle of one side 44, but are preferably positioned on the top portion 42 as shown. The reason for this is that when installed in the hole, it is possible to exert a tensile force on all sides and to fix it more firmly. In addition, if each side 44 of the star shape is curved outward, the diameter of the circumscribed circle can be reduced more smoothly, and the diameter of the inscribed circle of each side 44 increases, so that a thicker cable or cable You can pass the bundle.

  FIG. 5 shows a method of using a refractory filler holder constituted by a combination of the sleeve 26 and the star-shaped holding metal 38 as described above. 28 is a hollow wall of the building, 30 is a hole formed in the hollow wall 28, and 22 is a cable (flammable long body) penetrating the hole 30.

  First, as shown in FIGS. 5A1 and 5A2, the two semi-cylindrical members 32 of FIG. 2 are inserted into the holes 30 and assembled around the cable 22 as shown in FIG. The fixing piece 36A on one end side of the sleeve 26 is brought into contact with the outer surface of one wall plate 28A and fixed to the wall plate 28A with a set screw 46. The fixing piece 36B on the other end side may be left as it is or may be bent outward. This completes the installation of the sleeve 26.

  Next, in order to pass the cable 22 through the star-shaped holding metal fitting 38, the holding metal fitting 38 is arranged as shown in (A1) (A2) and then rotated in the direction of arrow P. Since the presser fitting 38 is a two-turn spiral body, the cable 22 can pass through the presser fitting 38 by rotating it in the direction of arrow P (this is a double-winding ring type key holder). It is the same as passing through the key hole). If the cable 22 is to be laid from now on, not when the cable 22 is laid in advance, a presser fitting 38 is arranged in front of the sleeve 26 and the cable 22 is passed through the sleeve 26 together. It is also possible to pass the cable 22 through the presser fitting 38.

Then retainer member 38, in the state in which the outer diameter of the circumscribed circle (smaller than the inner diameter _{D 3} of the sleeve 26) to be sized _{D 2} entering the sleeve 26 so the diameter, of (B1) (B2) In this way, the sleeve is inserted into the sleeve 26 and released at a position where there is a groove 34 at the back of the sleeve 26 when viewed from the side where the refractory filler is filled. As a result, each top 42 is strongly pressed against the inner surface of the sleeve 26 by the elastic repulsive force of the metal wire whose diameter has been deformed. In this state, when the presser fitting 38 is slightly moved back and forth in the axial direction, each top portion 42 of the presser fitting 38 falls into one of the grooves 34, and the presser fitting 38 cannot move in the axial direction.

Since the or diameter to what extent the circumscribed circle of the retainer member 38 is adjustable in situ alignment, even if there is some variation in the internal diameter D ₃ of the sleeve 26 can be installed without any trouble. Further, when the presser fitting 38 is installed, the groove 34 is engaged with the overlapping portion L at both ends in the circumferential direction of the semi-cylindrical member 32 by the elastic repulsive force, so that the shape of the sleeve 26 is stabilized.

  Next, as shown in FIG. 6, a soft block-shaped refractory filler 24 is filled in the gap in the sleeve 26. Since the holding metal fitting 38 installed earlier is prevented from moving in the axial direction, and the metal wire 40 intersects at a plurality of locations as shown in FIG. 5 (B2), the area for receiving the refractory filler 24 is large. It is possible to reliably prevent the fireproof filler 24 from protruding to the back side.

  Finally, if another presser fitting 24 is installed in the same manner as described above on the filling port side of the refractory filler, the fireproofing process of the portion through which the cable 22 penetrates the hollow wall 28 is completed. In this fireproofing structure, since the fireproof filler 24 in the sleeve 26 is sandwiched from the front and rear by the two presser fittings 38 whose movement in the axial direction is restricted, the temperature change of the cable 22 (flammable long body) The fireproof filler 24 can be reliably held at a predetermined position in the sleeve 26 against expansion and contraction due to vibration and vibration during an earthquake, and the intended fireproof performance can be maintained over a long period of time.

Embodiment 2 FIG. 7 shows another embodiment of the present invention. In this embodiment, the sleeve 26, the holding metal fitting 38, and the receiving metal fitting 10 constitute a fireproof filler holder. In this case, first, a sleeve 26 formed by combining two semi-cylindrical members 32 is inserted into the hole 30 of the hollow wall 28 through which the cable 22 passes, and a fixing piece 36A (not shown) on one end side is inserted in FIG. 5 (A1). It fixes to one wall board 28A like this. Next, the metal fitting 10 as shown in FIG. 12 is inserted into the sleeve 26 from the fixed end side of the sleeve 26. Two metal fittings 10 may be used as necessary, and installed so that the bottom frame portions intersect as shown in FIG. In this state, the refractory filler 24 is filled around the cable 22 in the sleeve 26. 3 is inserted into the filling port side with a reduced diameter, pressed against the end face of the refractory filler 24, and then released, and each top portion 42 of the holding metal 38 is inserted into the groove 34 on the inner surface of the sleeve 26. Depress. Thus, both ends of the refractory filler 24 are constrained within the sleeve 26 and held in place.

Embodiment 3 FIG. 8 shows still another embodiment of the present invention. This embodiment is a case where a fireproof filler holder is constituted by the sleeve 26 and one presser fitting 38. In this case, circumferential grooves 34 are formed not only on the inner peripheral surface of both ends in the axial direction of the sleeve 26 but also on the inner peripheral surface of the intermediate portion. The method of installing the sleeve 26 in the hole 30 of the hollow wall 28 is the same as in the first embodiment. The presser fitting 38 is installed so that each star-shaped top part falls into the groove 34 at the back of the sleeve 26 when viewed from the side where the refractory filler is filled. When the refractory filler 24 is filled in the sleeve 26 in this state, the outer peripheral surface of the refractory filler 24 enters the groove 34 in the axial direction intermediate portion of the sleeve 26, and the movement of the refractory filler 24 in the axial direction is restricted. .

  When the sleeve 26 having the groove 34 formed on the inner peripheral surface in the axial direction intermediate portion is used, a receiving metal 10 as shown in FIG.

  Further, when mortar or putty is used as the refractory filling material, if the groove 34 is formed on the inner peripheral surface of the intermediate portion in the axial direction of the sleeve 26, the mortar or putty enters the groove 34 and hardens. It is possible to reliably prevent the refractory filler from moving in the interior 26.

[Embodiment 4] FIG. 9 shows another embodiment of a sleeve constituting the refractory filler holder of the present invention. The sleeve 26 has a trumpet-shaped taper portion 48 formed on one end side. The fixing piece 36A protrudes in the radial direction from the outer edge of the tapered portion 48, is bent so as to be in contact with the wall plate 28A at the site, and is fixed with a set screw 46. The other configuration is the same as that of the sleeve 26 described in the first embodiment. When the sleeve 26 having the tapered portion 48 on one end is used as described above, it is possible to flexibly cope with variations in the inner diameter of the hole 30 of the hollow wall 28. The configuration other than the sleeve 26 is the same as that in each of the above embodiments.

[Embodiment 5] Fig. 10 shows another embodiment of a sleeve constituting the refractory filler holder of the present invention. Although only one semi-cylindrical member 32 is shown in FIG. 10, the sleeve is formed by combining two semi-cylindrical members 32. This semi-cylindrical member 32 has a large number of tongue pieces 52 formed by inserting a large number of slits 50 at the end opposite to the formation end of the fixed piece 36A. When the tongue pieces 52 are formed in this way, the sleeve is inserted into the hole of the hollow wall, and then the tongue piece 52 protruding from the hole is bent outward along the outer wall surface of the hollow wall. The protrusion from the hollow wall can be eliminated.

[Embodiment 6] Fig. 11 shows another embodiment of a sleeve constituting the refractory filler holder of the present invention. In the sleeve 26, a single metal plate 54 is formed in a cylindrical shape, and a circumferential groove 34 and a fixing piece 36A are formed as in the first embodiment. The metal plate 54 has a circumferential length such that both ends in the circumferential direction overlap each other when the sleeve 26 is installed in the hole of the hollow wall. L is an overlapping portion at both ends. Other configurations, usage methods, and the like are the same as those of the sleeve 26 described in the first embodiment.

The front view which shows one Embodiment of the sleeve which comprises the fireproof filler holder which concerns on this invention. The semi-cylindrical member which comprises the sleeve of FIG. 1 is shown, (A) is a front view, (B) is an inner side view, (C) is a bottom view. 1A and 1B are a front view and a side view, respectively, showing an embodiment of a holding metal fitting constituting a fireproof filler holder according to the present invention. The front view which shows the state which reduced the diameter of the pressing metal fitting of FIG. 1A and 1B show a procedure for installing the sleeve of FIG. 1 and the pressing metal fitting of FIG. 3 in the hole of the hollow wall, (A1) and (B1) are sectional views, and (A2) and (B2) are front views. Sectional drawing which shows the fireproof filler holding structure of a combustible elongate hollow wall penetration part using the sleeve of FIG. 1, and the pressing metal fitting of FIG. Sectional drawing which shows the fireproof filler holding structure of a combustible elongate hollow wall penetration part using the sleeve of FIG. 1, and the receiving metal fitting of FIG. Sectional drawing which shows the fireproof filler holding | maintenance structure of a combustible elongate body hollow wall penetration part using the sleeve of embodiment different from FIG. 1, and the pressing metal fitting of FIG. Sectional drawing which shows other embodiment of the sleeve which comprises the fireproof filler holder which concerns on this invention. The semi-cylindrical member of other embodiment of the sleeve which comprises the fireproof filler holder which concerns on this invention is shown, (A) is a front view, (B) is an inner side view, (C) is a bottom view. The still another embodiment of the sleeve which comprises the fireproof filler holder which concerns on this invention is shown, (A) is a front view, (B) is a partially cut-away side view by the BB line arrow of (A). The perspective view which shows the conventional fireproof filler receiving metal fitting. FIG. 13A is a partially cut perspective view, and FIG. 13B is a cross-sectional view of a fireproof structure of a flammable long solid solid wall penetration portion using the fireproof filler metal fitting of FIG. 12. Sectional drawing which shows the conventional sleeve used for a combustible elongate hollow wall penetration part.

Explanation of symbols

10: Fireproof filler holder 22: Cable (flammable long body)
24: Fireproof filler 26: Sleeve 28: Hollow wall 28A, 28B: Wall plate 30: Hole 32: Semi-cylindrical member 34: Groove 36A, 36B: Fixing piece 38: Fireproof filler pressing metal fitting 40: Elastic metal wire 42: Star Shape top 44: side 46: set screw 48: taper 50: slit 52: tongue

Claims (3)

A sleeve that is inserted so as to surround the combustible elongated body in a hole of a hollow wall through which the combustible elongated body passes, and holds an outer peripheral surface of a refractory filler filled around the combustible elongated body; In the fireproof filler holder of the hollow wall penetrating portion provided with,
Formed on the inner peripheral surface of the sleeve is a displacement preventing portion that restricts a member in contact with the surface from shifting in the axial direction,
Other prior Symbol sleeve, further comprising a retainer member for pressing the end face of the refractory filler is filled around the combustible long body,
The presser metal fitting is formed by bending a metal wire having spring elasticity into a star shape, and the diameter of the circumscribed circle of each top portion in a released state not subjected to external force is larger than the inner diameter of the sleeve. By twisting the whole in a direction where both ends of the metal wire cross each other against the elastic repulsive force of the wire, the diameter of the circumscribed circle of each top can be reduced to the size that fits into the sleeve,
When the presser fitting is put into the sleeve in a reduced diameter state and released within the sleeve, each apex abuts against the displacement preventing portion of the inner peripheral surface of the sleeve by elastic repulsion, and the movement of the presser fitting in the axial direction is restricted. A fireproof filler holder for a hollow wall penetrating portion, wherein The refractory filler holder according to claim 1 , wherein, in addition to the sleeve and the pressing metal fitting, a receiving metal fitting for receiving an end surface of the refractory filling material around the flammable elongated body on the side opposite to the filling port. In addition,
The presser fitting is installed in the sleeve so as to press the end face on the filling port side of the refractory filler, and each apex abuts against a shift preventing portion on the inner peripheral surface of the sleeve so that movement in the axial direction is restricted. A fireproof filler holder for a hollow wall penetrating portion. The fireproof filler holder according to claim 1 or 2 , wherein the slip preventing portion of the inner peripheral surface of the sleeve where the presser fitting is installed is a circumferential groove in which each top of the presser fitting falls. A fireproof filler holder for a hollow wall penetrating portion, characterized in that it is configured.

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