JP5576576B2 - Through-hole fire prevention structure - Google Patents

Description

The present invention relates to an inner peripheral surface of a through-hole formed in a partition body, such as a through-hole formed in a partition body such as a wall, floor, or ceiling, or a through-hole formed with a metal sleeve that is fixed to the partition body. and about transmural hole fire measures structure for suppressing flame or heat leakage through the gap between the outer surface of the insertion of the pipes and cables to be inserted thereto.

  As this kind of through-hole fire prevention material, a large number of thermally expandable members in which rock wool (an example of non-combustible material) and unfired vermiculite powder (an example of thermally expandable material) are mixed are made of PE material or the like. What was stored by the bag body in the lamination | stacking state is known (refer the following patent document 1).

  In other words, when a fire occurs in a state where the through-hole fire prevention material is loaded in a gap between the inner peripheral surface of the through-hole and the outer surface of the insertion body, all the thermal expansibility contained in the bag body When the material expands with heat at the time of fire, a new space generated by combustion (or melting) of the insertion body (that is, a space in which the thermally expandable member is not loaded) is closed.

JP 2007-32631 A

  However, since the thermally expandable material has the property of becoming very brittle due to the low density at the time of thermal expansion, the conventional through-hole fire protection material basically composed only of the thermally expandable material is used at the time of fire. As the density of the heat-expandable material is reduced, the fireproof performance is remarkably lowered, which causes a problem that the fireproof performance is extremely deteriorated after a fire.

The present invention was made in view of the circumstances described above, a main object thereof is that it provides an effective reduced transmural hole fire measures structures that give a reduction rate of fire performance before and after the fire It is in.

The present invention relates to a through-hole fire prevention structure, the characteristic configuration is
An incombustible material layer having flexibility and incombustibility on the outer surface side of the partition corresponding to the gap between the inner peripheral surface of the through hole formed in the partition and the outer surface of the insertion body inserted through the through hole; The through-hole fire-proof material comprising a fire-resistant and thermally-expandable material layer having flexibility, fire resistance, and thermal expansibility separately, wherein the incombustible material layer and the fire-resistant and thermally expandable material layer are in the radial direction of the through-hole. In a state where the annular holding frame is attached to the outer surface of the partition body and disposed on the outer periphery of the insertion body, and the annular holding frame is provided on the annular holding frame. The screw is inserted into the outer surface of the partition body by a screw inserted through the insertion hole of the locking portion and fixed .

In other words, among the non- combustible material layer and the refractory thermal expansion material layer separately provided in the through-hole fire prevention material held by the annular holding frame, the non- combustible material layer does not have a low density due to thermal expansion even after a fire . Therefore, according to the above-described configuration, only the presence amount of noncombustible layer, Ru can be reduced low density volume of the whole fire measure site with a low density refractory thermal expansion layer of a fire. Thereby, the fall rate of the fireproof performance before and behind a fire can be reduced effectively.

In the present invention, the incombustible material layer is arranged in a state facing the inner peripheral surface of the annular holding frame Rutotomoni, at least a portion of the refractory thermal expansion material layer is, the radial direction than the opening edge of the through hole It is preferable that the outer side of the partition body is disposed on the outer side .

In this invention, it is preferable that the said fireproof thermal expansion material layer is arrange | positioned in the state which faces the outer surface of the said insertion body.

In the present invention, the annular holding frame is formed so as to protrude inwardly from a peripheral wall portion that covers an outer surface side of the through-hole fire prevention material, and from an upper end portion of the peripheral wall portion. And a ceiling wall part covering the part.

In this invention, it is preferable that the said to-be-latched part is protruded and formed in the lower end part of the said surrounding wall part .

In this invention, it is preferable that the said annular holding frame is comprised by the some division | segmentation frame body which was dividedly formed in the circumferential direction of the said insertion body, and which can be engaged / disengaged mutually.
In this invention, it is preferable that the said nonflammable material layer contains an inorganic fiber.
In the present invention, at least the fire resistant thermal expansion material layer is disposed on the outer periphery of the insertion body, the through hole fire prevention material is surrounded by the annular holding frame, and then the annular holding frame is used by using the screw. Is preferably fixed to the outer surface of the partition.

Side surface sectional drawing of the through-hole fire prevention structure in 1st Embodiment Explanatory drawing of the through-hole fire prevention material in 1st Embodiment Explanatory drawing which shows the through-hole fire prevention method construction method in 1st Embodiment Side surface sectional view of the through-hole fire prevention structure in the second embodiment Exploded view of annular holding frame Explanatory drawing which shows the through-hole fire prevention method construction method in 2nd Embodiment Explanatory drawing of the through-hole fire prevention material in other embodiment

[First Embodiment]
FIG. 1 shows a gap S between an inner peripheral surface of a through-hole H formed in a floor slab Y (an example of a partition body) and an outer surface of a bundled pipe P (an example of an insertion body) inserted through the through hole H. The through-hole fire-protection structure loaded with the flexible through-hole fire-protection material T is shown.

  The through-hole fire prevention material T has a two-layer structure in which a non-combustible material layer 1 having flexibility and non-flammability and a fire-resistant and thermally expandable material layer 2 having flexibility, fire resistance, and thermal expansion properties are laminated ( An example of a multilayer structure including the non-combustible material layer 1 and the refractory thermal expansion material layer 2 is configured.

  In this through-hole fire-protection structure, the through-hole fire-protection material T is loaded in the gap S in a state where it is received and supported by the metal receiving member 4 in a posture in which the side of the refractory thermal expansion material layer 2 is inside. .

  As shown in FIG. 2, the through-hole fire prevention material T includes a strip-shaped incombustible material 1 a constituting the incombustible material layer 1 and a strip-shaped fire-resistant thermal expansion material 2 a constituting the fireproof thermal expansion material layer 2 in the thickness direction. It is configured to be accommodated in a long and slender bag body 3 (an example of a restraining means) in a state where it is stacked on. The length dimension of the through-hole fire protection material T is equal to or longer than the length that allows the entire circumference of the pipe P to be wound one layer, and in this example, the length dimension can be wound about two layers.

  The refractory thermal expansion material 2a is obtained by mixing unfired vermiculite powder (an example of a thermally expandable base material) with a base material (an example of a non-incombustible material) having flexibility and fire resistance such as a synthetic resin or rubber. It is configured. The thermally expandable base material may be expanded graphite or alkali metal silicate. On the other hand, the noncombustible material 1a is made of felt-like rock wool (an example of a noncombustible material) having flexibility and noncombustibility.

  The bag 3 is made of a translucent sheet material such as PE. That is, the through-hole fire prevention material T is formed by forming the sheet material constituting the bag body 3 into a long cylindrical shape, and then laminating the non-combustible material 1a and the refractory thermal expansion material 2a on the long cylindrical body. It is comprised by heat-sealing the both ends 3a, 3b of a long cylindrical body after that.

  As shown in FIGS. 1 and 3, the receiving member 4 includes a ring-shaped receiving portion 4 a that is inserted into the through-hole H, and a ring-shaped receiving portion 4 a that is engaged with the peripheral edge of the through-hole H. It comprises a plurality of L-shaped (four in this example) support legs 4b which are supported in the through hole H.

  A hinge part 4d for opening and closing the other side in the circumferential direction is formed at one place in the circumferential direction of the ring-shaped receiving part 4a. Further, each of the refracting end portions of the support leg 4b is formed with an attachment hole 4e for fixing the receiving member 4 to the floor slab Y by a fixing means K (not shown) such as a screw or a screw.

  In order to constitute the above-described through-hole fire prevention structure, as shown in FIGS. 3A to 3B, the ring-shaped receiving portion 4a of the receiving member 4 is brought close to the piping P in an open state, and the piping P is connected. It is located inside the ring-shaped receiving part 4a.

  Next, as shown in FIGS. 3B to 3C, the receiving member 4 is inserted into the through hole H along the pipe P with the ring-shaped receiving portion 4 a closed, and the support legs 4 b After the receiving member 4 is positioned by the engagement between the refracting end portion and the peripheral edge portion of the through hole H, fixing means such as a screw or a screw is inserted in the mounting hole 4e formed in the refracting end portion of each support leg 4b. The receiving member 4 is fixed to the floor slab Y by fixing K to the floor slab Y.

  Thereafter, as shown in FIG. 3 (c), the through-hole fire prevention material T is arranged on the outer peripheral surface of the pipe P in such a posture that the stacking direction of the non-combustible material layer 1 and the refractory thermal expansion material layer 2 is along the radial direction of the through-hole H. Wrap around.

  Then, as shown in FIGS. 3C to 3D, the through-hole fire protection material T wound around the outer peripheral surface of the pipe P is moved along the pipe P to the through-hole H side, The fire prevention material T is loaded into the gap S, and the through-hole fire prevention structure as shown in FIG. 1 is completed.

  If a small gap remains between the through-hole fire prevention material T and the outer surface of the pipe P in the state where the through-hole fire prevention material T is loaded in the gap S, a separately prepared small bag What is necessary is just to load the auxiliary fire protection material t in the shape of a small gap.

That is, in the through-hole fire prevention measure structure, the incombustible material layer 1 and the refractory thermal expansion material layer 2 are laminated in the radial direction of the through-hole H. The density reduction volume in the whole fire prevention part accompanying the density reduction of the thermal expansion material layer 2 can be reduced. Thereby, the fall rate of the fireproof performance before and behind a fire can be reduced effectively.

Moreover, since the refractory thermal expansion material 2a is configured to include a base material made of a non-incombustible material such as a synthetic resin or rubber, the coefficient of thermal expansion is higher than that of a case where the material is composed of a non-combustible material. Can be high. Thereby, the volume ratio of the refractory / thermal expansion material layer 2 occupying the entire through-hole fire prevention material T can be reduced accordingly, and the volume ratio of the non-combustible material layer 1 occupying the whole can be increased. Therefore, it is possible to further reduce the density reduction volume as a whole of the fire-protection measures part due to the reduction in density of the refractory thermal expansion material layer 2 at the time of fire, and more effectively reduce the reduction rate of the fire-proof performance before and after the fire can do.

Further, since the non-combustible material layer 1 and the refractory thermal expansion material layer 2 are laminated in a state where the refractory thermal expansion material layer 2 faces the outer surface of the pipe P, the pipe P is burned (or melted) in the event of a fire. Thus, the new space generated can be directly blocked by the thermal expansion portion of the refractory thermal expansion material layer 2 facing the outer surface of the pipe P. Therefore, for example, the closing accuracy and the closing speed can be effectively increased as compared with the case where it is indirectly closed by the expansion pressure of the refractory thermal expansion material layer 2 through another member facing the outer surface of the pipe P.

Further, since the plurality of refractory thermal expansion material layers 2 are laminated in the radial direction of the through hole H, the low density portion accompanying the reduction in the density of the refractory thermal expansion material layer 2 at the time of a fire is formed in the through hole. It can be dispersed in the radial direction of H. Therefore, it is possible to effectively reduce the probability of occurrence of a defect in which a part of the density-reducing portion falls off.

[Second Embodiment]
FIG. 4 shows another embodiment of the through-hole fire protection device according to the present invention. In this embodiment, the through-hole H formed in the floor slab Y (an example of a partition body) and the inner peripheral surface thereof are inserted. A through-hole fire prevention structure in which a flexible through-hole fire prevention material T is disposed on the outer surface side of the floor slab Y corresponding to a gap S between the outer surface of the bundled pipe P (an example of an insertion body). Show.

  In this through-hole fire prevention structure, the through-hole fire prevention material T is disposed on the outer surface side of the gap S in a state of being restrained and held by the metal annular holding frame 9 in a posture in which the side of the refractory thermal expansion material layer 2 is inside. Has been. In addition, in this example, the length dimension of the through-hole fire prevention material T is comprised by the length dimension which can wind three layers the perimeter of the piping P. As shown in FIG.

  The annular holding frame 9 has a mounting portion 10 for the floor slab Y, and is configured so as to be able to be mounted on a portion protruding from the through hole H on the outer surface side with respect to the floor slab Y.

  As shown in FIGS. 4 and 5, the annular holding frame 9 includes a plurality of (two in this example) same-shaped divided frame bodies 11, 11 divided into a plurality in the circumferential direction of the pipe P. It is configured to be connected to a letter-shaped opening posture and an annular closing posture so that the posture can be freely changed.

  Specifically, the annular holding frame 9 has one end 5 of one divided frame 11 and the other end 6 of the other divided frame 11 locked in the circumferential direction of the pipe P. The other end portion 6 of the divided frame body 11 and the one end portion 5 of the other divided frame body 11 are connected so as to be rotatable around an axis parallel to the axis of the pipe P.

  Each of the divided frame bodies 11 protrudes inwardly from a peripheral wall portion 11A having a substantially semi-ring shape in a front view having a curved side sectional shape whose outer diameter decreases toward the upper end side, and an upper end portion of the peripheral wall portion 11A. And a ceiling wall portion 11B having a substantially ring shape in front view.

  At the lower end of the peripheral wall portion 11A at each one end portion 5 of the divided frame body 11, a locked piece 5A having an insertion hole 5a formed at the center portion protrudes in the connecting direction (that is, the circumferential direction of the pipe P). Yes. On the other hand, at the lower end of the peripheral wall portion 11A at the other end portion 6 of each of the divided frame bodies 11, a cylindrical insertion hole 6a having a downward projecting edge that can be fitted into the insertion hole 5a (an example that can be locked). A locking piece 6A formed at the center is projected in the connecting direction.

  That is, the divided frame body 11 is in the one end portion 5 of the one divided frame body 11 in a posture in which the one end portion 5 of the one divided frame body 11 and the other end portion 6 of the other divided frame body 11 face each other. The cylindrical insertion hole 6a of the locking piece 6A in the other end portion 6 of the other divided frame body 11 is fitted into the insertion hole 5a of the locked piece 5A (an example of engagement), and the other divided frame The cylindrical insertion hole 6a of the locking piece 6A at the other end 6 of the one divided frame 11 is fitted into the insertion hole 5a of the locked piece 5A at the one end 5 of the body 11 (an example of engagement). Thus, the annular holding frame 9 is formed in a state in which the divided frame bodies 11 are joined together.

  Then, as described above, in the state where the divided frame bodies 11 and 11 are combined, it is formed by communication between the cylindrical insertion hole 6a of the locking piece 6A in the fitted state and the insertion hole 5a of the locked piece 5A. A plurality of (two in this example) communication holes 10a are formed, and the mounting portion 10 is configured to attach the annular holding frame 9 to the floor slab Y by a fixing means K such as a concrete screw.

  In addition, an auxiliary locking piece 6B having a locking projection 6b protrudes from the ceiling wall 11B at the other end 6 of the divided frame 11 in the connecting direction, and the ceiling wall 11B at the one end 5 extends. On the lower surface, an auxiliary locking receiving portion 5B having a locked recess 5b for the locking projection 6b is formed.

  That is, when the divided frame bodies 11 and 11 are combined, the auxiliary locking receiving portion 5B and the auxiliary locking piece 6B are also locked, so that the divided frame body 11 by the locked piece 5A and the locking piece 6A. , 11 is configured to suppress the release of the locked state between the two.

  Then, by hitting one communication hole 10a with a grommet 7 that can be rotatably fixed in a communication state with respect to the communication hole 10a of the annular holding frame 9, the divided frame body with the connection hole 10a portion as a movable fulcrum. 11 and 11 are connected and integrated so as to be rotatable. In addition, 8 is a recessed part formed in the both ends 5 and 6 of the surrounding wall part 11A of the division | segmentation frame 11 in order to make the fixing means K face the attachment part 10 easily.

  As shown in FIG. 6, the through-hole fire-proofing material is configured such that the stacking direction of the non-combustible material layer 1 and the refractory thermal expansion material layer 2 is along the radial direction of the through-hole H, as shown in FIG. T is wound around the outer peripheral surface of the pipe P on the outer surface side of the floor slab Y corresponding to the gap S.

  Next, after the annular holding frame 9 is arranged on the outer surface of the floor slab Y in a C-shaped opening posture, the annular holding frame 9 is annularly held so as to surround the wound body of the through-hole fire protection material T located on the outer surface side of the floor slab Y. The posture of the frame 9 is changed from the open shape of the letter C shape to the closed posture. Thereafter, the pair of fixing means K, K are screwed into the outer surface of the floor slab Y in a state of being inserted into the communication holes 10a, 10a of the annular holding frame 9 in the closed posture, and the through-hole fire prevention structure is completed.

  In addition, since the other structure is the same as the content demonstrated in 1st Embodiment, the same number is attached | subjected to the same structure location, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In each of the above-described embodiments, the case where the through-hole fire protection material T is wound around the pipe P in a posture in which the side of the refractory thermal expansion material layer 2 is the side of the pipe P (that is, the inside) is shown as an example. The through-hole fire prevention material T may be wound around the pipe P with the incombustible material layer 1 side facing inward.

(2) In the through-hole fire prevention structure shown in each of the above-described embodiments, the structure in which the through-hole fire prevention material T including the non-combustible material layer 1 and the refractory thermal expansion material layer 2 is provided in the gap S is shown as an example. For example, a structure in which the through-hole fire prevention material including the non-combustible material layer 1 and the through-hole fire protection material including the fireproof thermal expansion material layer 2 are separately provided in the gap S may be employed.

(3) In the first embodiment described above, the through-hole fire prevention material T is loaded in the clearance S, and the through-hole fire protection material T is received and supported by the metal receiving member 4. However, for example, a structure in which the through-hole fire protection material T is loaded in the gap S in a compressed state in which it is difficult to drop off may be used.

(4) In the second embodiment described above, the through-hole fire protection material T is a metal annular holding frame as a structure in which the through-hole fire protection material T is disposed on the outer surface side of the partition corresponding to the gap S. 9 shows an example of a structure that is disposed on the outer surface side of the partition corresponding to the gap S in a state of being restrained and held by 9, but for example, is penetrated and fixed to the partition with both ends protruding from the partition. Alternatively, a structure in which a through-hole fire prevention material T is inserted at the end of the metal sleeve may be used.

(5) In each of the above-described embodiments, the bag 3 containing the non-combustible material 1a and the refractory thermal expansion material 2a is shown as an example of the restraining means. It may be an agent, an adhesive tape, or a string or rubber that restrains and holds the incombustible material 1a and the refractory thermal expansion material 2a.

(6) In each of the above-described embodiments, the case where the length of the through-hole fire protection material T is configured with a length that is larger than the length that can further wind the entire circumference of the insertion body is shown as an example. Further, it may be configured with a length dimension smaller than that, a length dimension larger than that, or a length dimension that can be wound further.

(7) As an improvement of each of the above-described embodiments, the through-hole fire prevention material T is heat-sealed at an appropriate location in the longitudinal direction of the bag body 3 and cut and separated at the heat-sealed location (an example of a location to be cut) It may be configured to be possible. For example, as shown in FIG. 7 (a), cut portions 3d are formed at equal intervals in the longitudinal direction of the bag body 3, or as shown in FIG. 7 (b), the pipe diameter, the number of pipes, etc. The to-be-cut part 3d may be formed in the appropriate place corresponding to. In these cases, the stacking order of the incombustible material layer 1 and the refractory thermal expansion material layer 2 may be sequentially changed in the longitudinal direction.

(8) In each of the above-described embodiments, the case where the through-hole fire prevention material T has a two-layer structure in which the incombustible material layer 1 and the refractory thermal expansion material layer 2 are laminated is shown as an example. A multilayer structure of two or more layers comprising one or more layers of the material layer 1 and one or more layers of the refractory thermal expansion material layer 2, or a composition different from that of the incombustible material layer 1 or the refractory thermal expansion material layer 2 A multilayer structure including layers may be used.

(9) In each of the above-described embodiments, the case where the partition body is the floor slab Y is shown as an example, but a side wall, a ceiling wall, or the like may be used.

(10) In each of the above-described embodiments, the case where the insertion body is a bundle-like pipe P in which a plurality of inserts are bundled has been described as an example, but one pipe, one cable, a bundle-like cable, or It may be a single or bundled pipe.

(11) The incombustible material 1a is not limited to the rock wool shown in each of the above-described embodiments, and may be a putty agent for fire prevention mainly composed of calcium carbonate or the like.

Y compartment (floor slab)
H Through-hole P Insertion body (Piping)
S Gap T Through-hole fire prevention material 1 Incombustible material layer 2 Fireproof thermal expansion material layer 1a Incombustible material 2a Fireproof thermal expansion material

Claims (8)

On the outer surface side of the partition corresponding to the gap between the inner peripheral surface of the through hole formed in the partition and the outer surface of the insertion body inserted through the through hole,
A through-hole fire-proof material comprising separately a non-combustible material layer having flexibility and non-flammability and a fire-resistant and heat-expandable material layer having flexibility, fire resistance and thermal expansion,
In the state where the incombustible material layer and the refractory thermal expansion material layer are laminated in the radial direction of the through hole and are held by an annular holding frame attached to the outer surface of the partition body, Placed on the outer circumference ,
A through-hole fire-protection structure in which the annular holding frame is screwed and fixed to the outer surface of the partition body by a screw inserted through an insertion hole of a locked portion provided in the annular holding frame . The incombustible material layer is arranged in a state facing the inner peripheral surface of the annular holding frame Rutotomoni,
2. The through-hole fire-protection structure according to claim 1 , wherein at least a part of the refractory thermal expansion material layer is disposed in a state of facing an outer surface of the partition body at a radially outer side than an opening edge of the through-hole. .   The through-hole fire-protection structure according to claim 1 or 2, wherein the fire-resistant thermal expansion material layer is disposed in a state of facing the outer surface of the insertion body.   The annular holding frame is formed with a peripheral wall portion that covers the outer surface side of the through-hole fire prevention material, and a ceiling that is formed to protrude inward from the upper end portion of the peripheral wall portion and covers a part of the upper surface side of the through-hole fire prevention material The through-hole fire prevention structure according to any one of claims 1 to 3, further comprising a wall portion. The through-hole fire-protection structure according to claim 4 , wherein the locked portion protrudes from a lower end portion of the peripheral wall portion .   The through-hole fire-protecting measure according to any one of claims 1 to 5, wherein the annular holding frame is configured by a plurality of divided frame bodies that are formed in a circumferential direction of the insertion body and that can be engaged with and disengaged from each other. Construction. The through-hole fire prevention structure according to any one of claims 1 to 6, wherein the non-combustible material layer includes an inorganic fiber. At least the fireproof thermal expansion material layer is disposed on the outer periphery of the insertion body, the through hole fire prevention material is surrounded by the annular holding frame, and then the annular holding frame is separated from the partition using the screws. The through-hole fire prevention structure according to claim 1, wherein the through-hole fire prevention structure is fixed to an outer surface of the through hole.

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