Fireproof measure tool, and fireproof structure

Abstract

To improve workability at a site.SOLUTION: A fireproof measure tool 1 comprises: a cover member 2 fixed to an outside of a partition body W dividing a space and having a through hole formed therein and arranged around a central axis of the through hole; a thermal expansion member 3 arranged at the central axis side of the cover member 2 and having thermal expandability; and an energizing member 4 arranged at the opposite side of the central axis to the cover member 2 and energizing the cover member 2 toward the central axis side.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a fireproofing material that is applied to a partition that divides a space and has a long body passing through a through hole formed in the partition, and to a fireproof structure that includes the fireproofing material. [Background technology]

[0002] An example of a fireproofing device applied to the partition body is described in Patent Document 1, entitled "Fireproofing Compartment Wall Penetration Structure." In Patent Document 1, a first end of a fireproofing member is inserted as an insertion part into a penetration hole formed in the fireproofing wall, and an exposed part surrounds the heat insulating material while being exposed to the outside of the fireproofing wall. Then, the space between the inner surface of the penetration hole and the outer surface of the fireproofing member is filled with mortar. The exposed part is fastened by a metal fastening member at a position away from the fireproofing wall, and a state in which the mating surfaces located at both ends in the longitudinal direction are butted against each other is maintained.

[0003] However, in the configuration described in Patent Document 1, it was necessary to fasten the exposed portion with a fastening member that was separate from the fire-resistant member, and therefore there was room for improvement in terms of workability on site. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6898190 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, an object of the present invention is to provide a fireproofing material that has good workability on site, and a fireproof structure equipped with the same. [Means for solving the problem]

[0006] The present invention is a fireproofing device that is a partition that divides a space, and includes a cover member that is fixed to the outside of the partition having a through hole formed therein and arranged around the central axis of the through hole, a thermal expansion member that is arranged on the central axis side of the cover member and has thermal expandability, and a biasing member that is arranged on the opposite side of the central axis of the cover member and biases the cover member toward the central axis side.

[0007] The present invention also relates to a fire-resistant structure comprising a partition body that divides a space, the partition body having a through hole formed therein, an elongated body that penetrates the through hole, and a fire-resistant treatment device provided on the partition body, the fire-resistant treatment device comprising a cover member provided around the elongated body that penetrates the through hole, a thermal expansion member that is arranged on the elongated body side of the cover member and has thermal expansion properties, and a biasing member that is arranged on the opposite side of the cover member from the elongated body and biases the cover member toward the elongated body side.

[0008] According to these configurations, the biasing member biases the cover member toward the central axis, so that the position of the cover member relative to the elongated body can be stably maintained.

[0009] The thermal expansion member may be a holding member that holds the cover member around the central axis of the through hole.

[0010] According to this configuration, since the thermal expansion member having thermal expandability is used as the holding member, the cover member can be held around the central axis of the through hole.

[0011] Moreover, the holding member can be formed of a material including a thermally expandable material.

[0012] According to this configuration, the holding member can be easily formed from a material containing a thermally expandable material, which is a common material.

[0013] The cover member may also be provided with a retaining member that holds the cover member around the central axis of the through hole, the retaining member having a retaining main body portion that is provided around the central axis of the through hole, and the biasing member, and the biasing member may be formed integrally with the retaining main body portion.

[0014] According to this configuration, since the holding body and the biasing member are integrally formed, the holding member is easy to handle.

[0015] The cover member may also be held around the central axis of the through hole by a retaining member, the retaining member having a retaining main body portion provided around the central axis of the through hole and the biasing member, and the biasing member may be formed as a separate body so as to be detachable from the retaining main body portion.

[0016] According to this configuration, the urging member can be formed using a material and a processing method according to the function.

[0017] The biasing member may be integrated with the holding body by fitting.

[0018] According to this configuration, even if the biasing member is formed separately from the holding main body, they can be easily integrated.

[0019] The biasing member may have a portion formed from a non-combustible material.

[0020] According to this configuration, the portion of the urging member made of a non-combustible material does not burn to the end, so that the function of the urging member can be maintained for a long time even when exposed to the heat of a fire.

[0021] The holding main body portion can include an annular frame portion provided around the central axis of the through hole, and a plurality of protruding pieces protruding from the frame portion toward the central axis.

[0022] According to this configuration, since the frame portion and the plurality of protruding pieces are integrally formed, the holding body portion of the holding member can be easily handled. Effect of the Invention

[0023] According to the present invention, the biasing member can stably maintain the position of the cover member relative to the elongated body, thereby improving workability on site. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is a front view of the fireproofing device according to the first embodiment of the present invention, showing a state in which a thermal expansion member (a pair of half pieces) is opened. [Diagram 2] FIG. 4 is a rear view of the fireproofing device with a thermal expansion member in an open state. [Diagram 3] FIG. 4 is a front view showing the fireproof device with the thermal expansion member closed and the cover member removed. [Figure 4] FIG. 4 is a bottom view showing the fireproof device with the thermal expansion member closed and the cover member removed. [Diagram 5] FIG. 4 is a rear view of the fireproof device with the thermal expansion member closed and the cover member removed. [Figure 6] FIG. 1A is a plan view of a cover member used in the fire-resistant device in an expanded state, and FIG. 1B is a plan view of a cover member according to a modified example in an expanded state. [Figure 7] FIG. 13 is a perspective view showing the state in the middle of attaching the fireproofing device to the partition body, and showing the state where it has been attached around the elongated body. [Figure 8] FIG. 2 is a perspective view showing a state in which the fireproofing device is attached to a partition (attachment completed state), and showing a state in which the thermal expansion portion is closed and the shape of the cover member is adjusted. [Figure 9] FIG. 11 is a perspective view of the top side of a fireproofing device according to a second embodiment of the present invention, showing the fireproofing device with the thermal expansion member closed and the cover member removed. [Figure 10]FIG. 2 is a perspective view of the bottom side of the fireproofing device, showing the thermal expansion member in a closed state with the cover member removed. [Figure 11] FIG. 2 is a perspective view showing a half piece (single piece) used in the fireproofing device. [Figure 12] FIG. 4 is a perspective view showing a biasing member used in the fireproof device. [Figure 13] FIG. 4 is a plan view of a cover member used in the fireproof device in an expanded state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] -overview- Next, the present invention will be described by taking up two embodiments (first embodiment and second embodiment). Note that each embodiment is merely an example, and the present invention can be modified and implemented in various forms. The directions and positional relationships in the following description are the directions and positional relationships during the installation of the fireproofing device 1 to the partition body W (see FIG. 7) or after installation (see FIG. 8). However, the directions of each component may be described. Note that the thermal expansion member and the retaining member in each embodiment are given different names for the sake of explanation, but are the same component. For this reason, the same reference numeral ("3") is used in the figures. In the following description, the thermal expansion member 3 and the retaining member 3 are used differently depending on their functions.

[0026] First, the partition body W on which the fireproofing device 1 of each embodiment is arranged to construct the fireproof structure C will be described. As shown in Figs. 7 and 8, the partition body W is a plate-like object with a surface dimension larger than a thickness dimension, which is provided to partition the space inside a building into a plurality of spaces, and corresponds to, for example, a wall or a floor. In the case of a wall, the space inside the building is partitioned into two spaces, the front side and the back side of the wall. The above-mentioned "front side" and "back side" indicate the direction when facing the surface W1 of the partition body W, and are also used in the following description of the direction of the fireproofing device 1. In Fig. 7 and the like, the partition body W is drawn as a solid object, but it may be a hollow object composed of, for example, two parallel plate-like bodies. In the partition body W, the surface facing the partitioned space is defined as the surface W1. This surface W1 is a flat surface. It may be a surface other than a flat surface (a curved surface or a surface having irregularities). This partition body W has a through hole (not shown directly) penetrating in the thickness direction. The through hole in each embodiment is assumed to be a round hole with a circular cross-sectional shape. A long body L penetrates through this through hole from one space (e.g., the front side) to the other space (e.g., the back side) separated by the partition W. The long body L overlaps with the central axis of the through hole along the thickness direction of the partition W and is often arranged along the central axis. The central axis is an imaginary line passing through the radial center of the through hole. In some cases, the long body L may be arranged off the central axis. The long body L is an object that can pass fluid, power, and electric signals between the one space and the other space and has a longitudinal dimension larger than a radial dimension, such as a pipe or an electric wire. A plurality of long bodies L can be passed through one through hole (three are shown in FIG. 7, etc.). In this case, the plurality of long bodies L can be bundled together in a group by a binder or the like. In the following description, the number of long bodies is not limited and the long body L is simply referred to as "long body L". The fireproof structure C is composed of three elements: a partition W, a long body L, and a fireproofing device 1 arranged on a surface W1 of the partition W so that the long body L penetrates therethrough.

[0027] -First embodiment- Next, the fire-resistant device 1 of the first embodiment will be described. Figs. 1 and 2 show the whole device, and Figs. 3 to 5 show the state in which the cover member 2 has been removed in order to explain the configuration of the thermal expansion member 3. The fire-resistant device 1 can be implemented in various forms other than those shown in the drawings. The main components of the fire-resistant device 1 are the cover member 2, the thermal expansion member 3, and the biasing member 4. The cover member 2 is made of a soft material, and the thermal expansion member 3 and the biasing member 4 are made of a hard material. The thermal expansion member 3 can also be made of a soft material such as rubber.

[0028] The cover member 2 is fixed to the outside of the partition W and is provided around the central axis along the thickness direction of the partition W at the through hole in the partition W. A fire-resistant and flexible sheet-like body 2a (see FIG. 6(A)) is used for the cover member 2. The flexibility is preferably such that it can be easily attached and shaped around the elongated body L shown in FIG. 7 and FIG. 8, for example.

[0029] The sheet-like body 2a is a sheet formed from a non-combustible material, and the base layer can be made of, for example, a glass cloth sheet or a rock wool sheet. Therefore, it is possible to reduce the weight, for example, compared to a configuration using a metal plate. The base layer can be a single layer or multiple layers. The sheet-like body 2a may be made of only a base layer, or a layer made of other material (for example, a metal layer such as aluminum) can be added to the base layer as appropriate to add performance and aesthetics. For example, by adding a metal layer, the deformed state shown in Figures 7 and 8 can be maintained without using a holder (pin, wire, etc.) or adhesive. However, the deformed form may be maintained using a holder (pin, wire, etc.) or adhesive. In this embodiment, the sheet-like body 2a in the deformed state is supported from the outside by the biasing member 4, and is maintained in a state arranged around the long body L. Layers can be added by various means such as vapor deposition and bonding metal foil.

[0030] The sheet-like body 2a before being attached to the thermal expansion member 3 as the cover member 2 is composed of a flat sheet having a rectangular shape (or a band shape), for example, as shown in FIG. 6(A). As shown in FIG. 6(A), a plurality of (four in this embodiment) mounting slits 21 are provided at regular intervals along one of the long sides. At one end (lower end in the figure) in the state shown in FIG. 6(A), a portion without the mounting slits 21 is set as a protruding portion 22 that is longer than the other end (upper end in the figure). This protruding portion 22 is drooping in the initial state attached to the partition body W as shown in FIG. 7 (however, depending on the vertical setting when attached to the partition body W, it may not appear to be drooping), and in the state where the attachment is completed as shown in FIG. 8, this drooping protruding portion 22 is sandwiched and hidden by other portions including the other end, and the overall shape of the cover member 2 is adjusted so that it is approximately uniform in the circumferential direction.

[0031] When the sheet-like body 2a is integrated with the thermal expansion member 3 to form the cover member 2, as shown in FIG. 2, each of the mounting slits 21 is passed through the biasing member 4 in the holding member 3 (thermal expansion member 3), and the mounting slits 21 are positioned at the base 41 of the biasing member 4. Therefore, the longitudinal dimension of each mounting slit 21 is slightly larger than the width dimension of the biasing member 4. In this embodiment, the sheet-like body 2a is not bonded to the holding member 3, but may be bonded. Also, an adhesive tape may be interposed between the sheet-like body 2a and the holding member 3. When the fireproofing device 1 is placed on the partition body W, the part of the cover member 2 that is radially inward of the mounting slits 21 is located closer to the partition body W than the biasing member 4. Due to this positional relationship, the cover member 2 is supported by the biasing member 4. In this embodiment, since four biasing members 4 are provided, the sheet-like body 2a is folded so as to be substantially quadrangular (more specifically, substantially square) in front view and is aligned with the holding member 3. In addition, when the pair (two) of half pieces 3a, 3a of the holding member 3 are in an open state, the approximately rectangular shape is unequal (see Figs. 1 and 2). When the sheet-like body 2a is fitted along the holding member 3 in this way, the end of the sheet-like body 2a is on the front side of the holding member 3 (see Figs. 1 and 2), but the end of the sheet-like body 2a may be folded back and rolled up to the back side of the holding member 3. In this case, the sheet-like body 2a can be made circular in front view by fitting along the radial outer edge of the holding member 3. In the case of a circular shape, it is possible to eliminate a portion protruding in the circumferential direction compared to a polygonal shape, so that the aesthetic appearance of the fireproofing device 1 can be improved. In this case, the portion of the sheet-like body 2a that is rolled up on the back side of the holding member 3 is sandwiched between the surface W1 of the partition body W and the holding member 3. When the sheet-like body 2a is thus rolled up and arranged, at least a part of the thermal expansion member 3 that expands in the event of a fire is received by the folded-back portion, and as a result, the entire thermal expansion member 3 can be contained within the fireproofing device 1. As the rectangular sheet-like body 2a is fitted along the circular retaining member 3, the portion corresponding to the radially inner side of the retaining member 3 has excess sheet-like body 2a in the longitudinal direction due to the difference in circumferential dimensions between the inner and outer diameters.7, the excess portion of the sheet-like body 2a is folded in a substantially V-shape between the circumferentially adjacent biasing members 4 to form a folded portion 23, thereby adjusting the shape of the entire cover member 2. As a result of the folding, the cover member 2 is brought closer to the elongated body L, and the gap between the elongated body L and the cover member 2 can be reduced.

[0032] As shown in Figs. 1 and 2, the thermal expansion member 3 is a member disposed on the central axis side (i.e., radially inward) of the cover member 2. As shown in Fig. 7, in order to position the long body L at the radially inner position, the thermal expansion member 3 is divided into two half pieces 3a, 3a of the same shape, and one end (upper end in Fig. 1, etc.) of both half pieces 3a, 3a is hinged so as to be rotatable. On the other hand, at the other end (lower end in Fig. 1, etc.), a pair of half pieces 3a, 3a can be joined by fitting. After being joined, the thermal expansion member 3 (including the holding body part 33) becomes a plate-like body with approximately rotational symmetry. In this embodiment, the structure of the hinge connection at the one end and the structure of the fitting connection at the other end are the same structure. More specifically, as shown in Fig. 3, the structure is a combination of a through hole 31 formed along the central axis and a protrusion 32 that can be fitted into the through hole and can rotate relative to the through hole in the fitted state. This structure is just one example and can be modified in various ways.

[0033] The thermal expansion member 3 is formed from a material containing a thermal expansion material. Various materials that expand when exposed to heat, such as expandable graphite, can be used as the thermal expansion material. The thermal expansion member 3 is formed by molding a material in which a thermal expansion material is mixed with resin. Therefore, the thermal expansion member 3 has thermal expansion properties. The holding member 3 can be easily formed from a material containing a thermal expansion material, which is a common material.

[0034] The thermal expansion member 3, which is a member focusing on the function in the event of a fire, is also a holding member 3 that holds the cover member 2 around the central axis of the through hole. In other words, the thermal expansion member 3 having thermal expansion properties holds the cover member 2 around the central axis of the through hole. This holding member 3 (thermal expansion member 3) includes a holding body portion 33 provided around the central axis of the through hole in the partition body W, and a biasing member 4 (details will be described later). The holding body portion 33 and the biasing member 4 are integrally formed. Since the holding body portion 33 and the biasing member 4 are integrally formed, the holding member 3 is easy to handle. As shown in FIG. 5, the holding body portion 33 includes an annular frame portion 331 provided around the central axis of the through hole in the partition body W, and a plurality of protruding pieces 332-332 protruding from the frame portion 331 toward the central axis (in the radial inward direction). The term "annular" refers to the state of the fire-resistant device 1 after the fire-resistant structure C has been constructed. The frame portion 331 and the multiple protruding pieces 332-332 are integrally formed.

[0035] When one set of half pieces 3a, 3a is joined together, the frame 331 has a circular shape as shown in FIG. 5. Six protruding pieces 332 are provided on each half piece 3a, and a total of 12 protruding pieces 332 are provided on the frame 331. The number of half pieces 3a is not particularly limited. The multiple protruding pieces 332 are provided at regular intervals in the circumferential direction. As shown in FIG. 3 and FIG. 5, when one set of half pieces 3a, 3a is joined together to form a circular shape, the multiple protruding pieces 332 do not reach the radial center of the holding body 33, and a space is secured through which the long body L can pass.

[0036] As shown in Figs. 7 and 8, the frame portion 331 is a portion that is brought into contact with the surface W1 of the partition body W when the fire-resistant structure C is constructed.

[0037] Each protruding piece 332 is flat in the initial state and extends straight in the radial direction. On the other hand, as shown in Fig. 8, when a pair of half pieces 3a, 3a are joined together and the long body L penetrates, the protruding piece 332 comes into contact with the long body L and curves toward the front side (illustrated) or the back side in the central axis direction. However, when the long body L is thin or the number of the long bodies L is small, the protruding piece 332 may not curve. Each protruding piece 332 is a flat part having a substantially isosceles triangle shape in a front view, smaller in thickness than the frame part 331, and is provided so as to be flush with the side farther from the surface W1 of the partition body W.

[0038] The biasing member 4 is disposed on the opposite side of the central axis (i.e., radially outward) with respect to the cover member 2, and biases the cover member 2 toward the central axis. The biasing member 4 biases the cover member 2 toward the central axis, thereby pushing the cover member 2 and stably maintaining the position of the cover member 2 relative to the long body L. The biasing member 4 is composed of a base 41 and an inclined portion 42. The base 41 and the inclined portion 42 are integrally formed. In the holding member 3 of this embodiment, four biasing members 4 are provided at equal intervals (every 90 degrees) in the circumferential direction. Note that the biasing members 4 are provided at the same positions in each half piece 3a constituting the holding member 3. The number of biasing members 4 is not limited to four, and may be various numbers.

[0039] The base 41 is substantially U-shaped when viewed in the circumferential direction (see FIG. 4), and protrudes radially outward from the outer periphery of the frame 331 of the holding body 33, with the space enclosed by the substantially U-shaped shape facing inward radially. The base 41 has a through hole 411 that penetrates in the direction along the central axis (thickness direction). This through hole 411 is used when fastening the fireproof device 1 to the partition body W with a screw.

[0040] The oblique portion 42 is a flat portion extending diagonally inward from the upper portion of the base portion 41, which is the generally U-shaped portion. More specifically, the oblique portion 42 extends inwardly and in a direction away from the holding body portion 33 in the central axis direction toward the tip of the oblique portion 42. The oblique portion 42 has a constant width in the extension direction. The base portion 41 and the oblique portion 42 have the same width. The tip edge of the oblique portion 42 is curved so as not to damage the cover member 2.

[0041] The urging member 4 of this embodiment has a portion made of a non-combustible material. As a result, the portion of the urging member 4 made of the non-combustible material is not burned to the end, so that the function of the urging member 4 can be maintained for a long time even when exposed to the heat of a fire (until the urging member 4 expands due to heat and the position of the portion made of the non-combustible material is no longer maintained). The portion made of the non-combustible material is not essential, and may not be included. If there is no portion made of a non-combustible material (for example, metal), there is an advantage that the elongated body L is less likely to be damaged by the urging member 4. Another advantage is that production costs can be reduced and the number of steps in the manufacturing process can be reduced. Since this portion is made of a different material from the main body of the urging member 4, the portion made of the non-combustible material is separate from the main body of the urging member 4. In this embodiment, the portion made of the non-combustible material is a reinforcing portion 5 made of steel plate, which reinforces the main body of the urging member 4, which is made of resin. In addition, the main body of the urging member 4 functions as an external urging portion, and the reinforcing portion 5 functions as an internal urging portion. The reinforcing portion 5 is disposed along the inner side of the inclined portion 42 of the urging member 4, and in the portion of the urging member 4 corresponding to the base portion 41, as shown in Figs. 4 and 7, is located so as to sandwich the cover member 2 at the side of the base portion 41 closer to the partition body W (the lower side of the approximately U-shaped portion). Therefore, in relation to the cover member 2, the outer urging portion (main body of the urging member 4) is a portion that performs a free state attachment by penetrating the installation slit 21, and the inner urging portion (reinforcing portion 5) is a portion that performs a fixed attachment by sandwiching the cover member 2 at the radially outer extension position of the frame portion 331. The reinforcing portion 5 has a plurality of claw portions 51-51 each having a different shape, and each claw portion 51 is hooked to the holding body portion 33, thereby forming an integral part with the main body of the urging member 4. The urging member 4 is integrated with the main body only by the hooking of each claw portion 51 (without using a fastener or adhesive).

[0042] The configuration of the fireproofing device 1 is as described above. Next, a method of constructing the fireproofing structure C for the partition body W will be described. First, the fireproofing device 1 with the pair of half pieces 3a, 3a constituting the holding member 3 in an open state is placed on the front side of the partition body W as shown in FIG. 7. The opening degree of the pair of half pieces 3a, 3a may be such that the long body L can be passed between the pair of half pieces 3a, 3a. In this state, the protruding portion 22 appears in the cover member 2. Next, the pair of half pieces 3a, 3a is closed to make the thermal expansion member 3 (holding member 3) circular. Then, the protruding portion 22 of the cover member 2 is inserted into another portion of the cover member 2 to shape the cover member 2. Also, if necessary, the cover member 2 is squeezed so as to be in close contact with the long body L. This completes the arrangement as shown in FIG. 8. After that, the urging member 4 is screwed to the partition body W, thereby fixing the fireproofing device 1 to the partition body W. In this embodiment, the conventional tightening process using fastening members can be eliminated, improving workability on site.

[0043] If a fire breaks out in the space in front of the partition W, the heat of the fire will cause the entire thermal expansion member 3 (particularly the frame portion 331) to expand, blocking the space in the through hole in the partition W on the front side and preventing heat from being transmitted to the space in the back of the partition W. The space left after the flammable parts of the long body L (such as the sheath of an electric wire) are burned will also be blocked by the expanded thermal expansion member 3 (particularly the protruding piece portion 332). This prevents the fire from spreading across partitions via the through hole.

[0044] -Second embodiment- Next, a second embodiment will be described. The configuration of the fireproofing device 1 of the second embodiment is basically the same as that of the first embodiment, so the following mainly describes the parts that differ from the first embodiment. Also, the same reference numerals are used in the drawings, except for parts that need to be distinguished from the first embodiment.

[0045] 9 to 11, each protruding piece 332 in this embodiment is curved from the beginning (before being placed in the partition W). The curved direction of the protruding piece 332 is such that the tip side is the near side in the central axis direction with respect to the partition W. By making it into such a shape, the protruding piece 332 as a part of the thermal expansion member 3 can be easily brought into contact with the long body L along the central axis direction.

[0046] The frame portion 331 of this embodiment is integrally formed with the fitting protrusions 34. The fitting protrusions 34 are provided to mount the urging member 4 by fitting and to support the cover member 2 (not shown in the second embodiment). The fitting protrusions 34 are provided at four locations (two locations on the half piece 3a) on the holding member (thermal expansion member) 3 at regular intervals in the circumferential direction. The fitting protrusions 34 are composed of a first protrusion 341 and a second protrusion 342. Note that the fitting protrusions 34 are not limited to this configuration. The first protrusion 341 is a protrusion that extends radially outward from the radial outer circumferential surface of the frame portion 331. The tip portion is bent toward the back side in the central axis direction, and this portion is a claw portion 3411. The second protrusion 342 is a protrusion that extends in the central axis direction from the side surface of the frame portion 331 (the side surface on the front side in the central axis direction). The tip portion is bent radially inward, and this portion is a claw portion 3421. It should be noted that the radial distance between the first projection 341 and the second projection 342 can be determined arbitrarily, and it is also possible to make the distance smaller than that shown in the figure.

[0047] The biasing member 4 in this embodiment is formed as a separate body so as to be detachable from the holding body portion 33. This is advantageous because the biasing member 4 can be formed, for example, by a material and processing method most suited to the function. The biasing member 4 in this embodiment is formed by bending a steel plate (the material is not limited to this). Also, compared to a case where the biasing member 4 is integrally formed with the holding body portion 33 (for example, the first embodiment), the shape of each unit can be simplified, making it easier to mold each one. Note that in this embodiment, the reinforcing portion 5 used in the first embodiment is not used.

[0048] The biasing member 4 of this embodiment can be integrated with the holding body 33 by fitting. Therefore, the biasing member 4 can be easily integrated with the holding body 33. Specifically, as shown in FIG. 12, the biasing member 4 has a first base 43, a second base 44, and an inclined portion 46, each of which is flat, formed in the order from the radially outer side to the radially inner side in the state of being attached to the frame 331. A step portion 45 is interposed between the first base 43 and the second base 44. The step portion 45 is formed with a dimension corresponding to the thickness of the frame 331. Therefore, in a state in which the second base 44 is in contact with the side surface of the frame 331, the first base 43 can be in contact with the surface of the partition W or can be opposed with a small gap therebetween. In addition, a portion of the sheet-like body 2a folded back in the cover member 2 is sandwiched between the step portion 45 and the radially outer peripheral surface of the frame 331. This allows the cover member 2 to be kept supported by the holding member 3. In this embodiment, a rectangular through hole is provided in the step portion 45, but the formation of this through hole is optional.

[0049] The first base 43 and the second base 44 correspond functionally to the base 41 of the first embodiment. A through hole 431 is formed in the first base 43. The through hole 431 corresponds functionally to the through hole 411 of the first embodiment. A rectangular first fitting hole 432 penetrates the first base 43 in the thickness direction. As shown in FIG. 9, the first projection 341 (including the claw portion 3411) of the holding member 3 is fitted into the first fitting hole 432 in a state where it passes through the first fitting hole 432. A rectangular second fitting hole 441 penetrates the second base 44 in the thickness direction. As shown in FIG. 9, the second projection 342 of the holding member 3 is fitted into the second fitting hole 441 in a state where it passes through the second fitting hole 441. In this fitted state, the claw portion 3421 of the second projection 342 functions as a stopper. The cover member 2 is sandwiched in the gap S between the second base 44 and the side surface of the frame portion 331. This allows the cover member 2 to be kept supported by the holding member 3.

[0050] The inclined portion 46 corresponds functionally to the inclined portion 42 of the first embodiment. The inclined portion 46 is bent at an obtuse angle at a bent portion 47 with respect to the second base portion 44. In this embodiment, two rigidity adjustment holes 48 are formed in the bent portion 47. These rigidity adjustment holes 48 allow the elastic force of the inclined portion 46 when pressing the cover member 2 to be appropriately adjusted. The number of rigidity adjustment holes 48 is arbitrary. Also, the rigidity adjustment holes 48 do not have to be provided.

[0051] FIG. 13 shows the sheet-like body 2a of this embodiment. The fitting projection 34 is composed of a first projection 341 and a second projection 342, and the assembly slit 25 is composed of a first slit 251 and a second slit 252 arranged in parallel in the width direction. The base of the first projection 341 of the holding member 3 passes through the first slit 251. The base of the second projection 342 of the holding member 3 passes through the second slit 252. In this embodiment, a hooking through hole 26 is formed in the protruding portion 22. This hooking through hole 26 is formed larger than each of the slits 251 and 252. By hooking this hooking through hole 26 onto one urging member 4, the cover member 2 can be shaped.

[0052] When the radial distance between the first protrusion 341 and the second protrusion 342 is made smaller than that in this embodiment, the first slit 251 and the second slit 252 can be integrated into one slit (through hole). Although not shown, in this embodiment, recesses similar to the multiple recesses 24 shown in Fig. 6(B) can be provided in the sheet-like body 2a.

[0053] -Example of change- Although two embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

[0054] For example, the through-hole of the partition W in the fire-resistant structure C in each of the above-described embodiments is assumed to be a round hole, but is not limited to this and may be a square hole having a polygonal cross-sectional shape.

[0055] The frame portion 331 of the holding body portion 33, which corresponds to the shape of the through hole, is a circular ring in each of the above-mentioned embodiments. However, it is not limited to this, and may be a polygonal ring. That is, the frame portion 331 may have any shape as long as it can be arranged at a radially outer position of the through hole so as to surround the through hole. Also, in the above-mentioned embodiments, a set (two) of half pieces 3a, 3a each having a substantially semicircular shape are combined by hinge connection, but a combination of three or more members may be used. Also, the holding member (thermal expansion member) 3 may be composed of one member as long as it has a structure such as a slit that allows the long body L to pass through in the radial direction. In this case, in each of the above-mentioned embodiments, the hinge connection structure and the fitting connection structure at the other end are the same structure and are provided at two places, but the fitting connection structure can be provided at only one place. Also, various methods can be adopted for connecting a set of half pieces 3a, 3a. For example, the hinge connection structure may be a fitting structure with a recess and a protrusion.

[0056] In addition, the sheet-like body 2a in each of the above embodiments is a sheet formed from a non-combustible material. However, it is not limited to this, and may be a sheet formed from a flame-retardant material. In addition, although an example of the shape of the sheet-like body 2a is shown in FIG. 6(A), it is also possible to provide a plurality of recesses 24 on one of the long sides as shown in FIG. 6(B). In the example shown in FIG. 6(B), the recesses 24 have curved edges, but the recesses 24 can have various shapes. By providing the recesses 24 in this way, the width dimension of the sheet-like body 2a can be reduced at the recesses 24, so that the shape of the entire cover member 2 can be adjusted even if the folded portion 23 as in the above embodiment is not formed.

[0057] Furthermore, the thermal expansion member 3 may not have (or may not also have) the function of a holding member. In this case, the holding member may be provided separately from the thermal expansion member 3. Also, after the holding member is formed separately, it may be attached to the thermal expansion member 3 to be integrated.

[0058] In each of the above-described embodiments, the thermal expansion member 3 is attached by passing the biasing member 4, which is integrally formed with the thermal expansion member 3, through the installation slits 21, 25 of the sheet-like body 2a. Alternatively, for example, the thermal expansion member 3 may be attached by being attached to the surface of the cover member 2 facing the partition body W.

[0059] In addition, the biasing member 4 in each of the above-mentioned embodiments has the inclined portions 42, 46, but instead of the inclined portions 42, 46, for example, it may have a portion that extends in the central axis direction and then bends to extend in the radial direction. Even when the inclined portions 42, 46 are included, the angle at which the inclined portions 42, 46 extend with respect to the base portion 41 (first embodiment), or the first base portion 43 and the second base portion 44 (second embodiment) can be set to various angles. In addition, in the first embodiment, the width dimensions of the base portion 41 and the inclined portions 42 are the same. However, this is not limited thereto, and the width dimension of the inclined portions 42 may be smaller than that of the base portion 41. Also, as in the second embodiment, only the inclined portions 42, or both the base portion 41 and the inclined portions 42 may be tapered. The tapered portion may have a shape in which the width dimension is gradually reduced (see FIG. 12 of the second embodiment), but may have other shapes. Also, in the second embodiment, the entire portion (first base portion 43, second base portion 44, and oblique portion 46) may be tapered. [Explanation of symbols]

[0060] 1 Fireproofing equipment 2 Cover material 2a Sheet-like body 3 Thermal expansion material, retaining material 3a half piece 33 Holding body part 331 Frame 332 Projection piece 34 Fitting protrusion 4. Pressing member 41 Base 42 Oblique section 43 1st base 44 Second base 46 Diagonal section 5 Reinforcement C Fireproof structure W partition body W1 Partition surface L Long body

Claims

1. A partition that partitions a space, the partition having a through hole formed therein, and a cover member that is fixed to the outside of the partition and provided around a central axis of the through hole; a thermal expansion member that is disposed on the central axis side of the cover member and has thermal expandability; a biasing member disposed on an opposite side of the cover member from the central axis and biasing the cover member toward the central axis; Fire-resistant equipment equipped with

2. The fireproofing device according to claim 1 , wherein the thermal expansion member is a holding member that holds the cover member around the central axis of the through hole.

3. The fireproofing device according to claim 2 , wherein the holding member is formed of a material including a thermally expandable material.

4. a holding member that holds the cover member around the central axis of the through hole, The holding member includes a holding body portion provided around the central axis of the through hole and the biasing member, The fireproofing device according to claim 1 , wherein the biasing member is integrally formed with the holding body portion.

5. a holding member that holds the cover member around the central axis of the through hole, The holding member includes a holding body portion provided around the central axis of the through hole and the biasing member, The fireproof measure according to claim 1 , wherein the biasing member is formed as a separate body so as to be detachable from the holding body.

6. The fireproof measure according to claim 5 , wherein the biasing member is integrated with the holding body portion by fitting.

7. 6. The fireproofing device according to claim 4, wherein the biasing member has a portion made of a non-combustible material.

8. 6. The fireproofing device according to claim 4 or 5, wherein the retaining body portion comprises an annular frame portion provided around the central axis of the through hole, and a plurality of protruding pieces protruding from the frame portion toward the central axis.

9. A partition that partitions a space, the partition having a through hole formed therein; An elongated body that passes through the through hole; A fireproofing device is provided on the partition body, The fireproofing device is a cover member provided around the elongated body passing through the through hole; a thermal expansion member that is disposed on the elongated body side with respect to the cover member and has thermal expandability; a biasing member disposed on an opposite side of the cover member from the elongated body and biasing the cover member toward the elongated body; Fire-resistant construction with

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