JP2016204926A - Fire-resistant ceiling backing material attachment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a fireproof coating layer with proper earth-resisting ability in H-shaped steel that is a ceiling beam material, and form the fireproof coating layer by efficient work.SOLUTION: A spacer metal 2 is interposed between a ceiling hanger bolt 1 and an H-shaped steel F that is a ceiling beam material. The spacer metal 2 is attached to the H-shaped steel F via a spacer bracket 3. A fireproof coating layer 4 is formed on the H-shaped steel F in a state in which a lower part 2a of the spacer metal 2 is exposed. The ceiling hanger bolt 1 is suspended from the exposed part 2a of the spacer metal 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ceiling base material in which a ceiling suspension bolt is suspended on an H-shaped steel or ceiling concrete slab, which is a ceiling beam material of a building, and a fireproof ceiling base for forming a fireproof coating layer on the H-shaped steel or ceiling concrete slab. The present invention relates to an improvement of a material mounting device.

  In general, in steel-framed or reinforced concrete fire-resistant buildings, H-beams and ceiling concrete slabs, which are ceiling beam materials that hold ceiling suspension bolts, which are ceiling foundation materials, prevent a decrease in yield strength that accompanies a rise in temperature during a fire. Therefore, a fireproof coating treatment is applied to the exposed surfaces of the H-shaped steel and the ceiling concrete slab.

  FIG. 12 shows a conventional ceiling base material attaching apparatus before performing a fireproof coating treatment, and the lower surface of a ceiling concrete slab (a concrete plate with concrete mortar laminated) S is a ceiling beam material. It is supported by H-shaped steel F.

  The H-shaped steel F is composed of an upper flange 1F, a lower flange 2F opposite to the upper flange 1F, and a web W connecting the two. Using the lower flange 2F, an upper horizontal piece 20a, a lower horizontal piece 20b, and a vertical piece 20c The U-shaped hanging metal fitting 20 is inserted, the hanging bolt 21 is screwed into the lower horizontal piece 20b, and the tip of the hanging bolt 21 is pressed against the lower surface of the lower flange 2F, whereby the hanging metal fitting 20 is attached to the lower flange 2F. The hanger 22 is fixed to the lower end portion of the suspension bolt 21 with the nut 23, the field edge receiver 24 is engaged with the hanger 22, and the field edge 26 is attached to the field edge receiver 24 via the clip 25. A ceiling material 27 is attached to the edge 26 by nailing or bonding.

  In order to perform the fireproof coating process on the ceiling base material having such a conventional structure, conventionally, the fireproof coating process is performed according to the procedure shown in FIG. That is, as shown in FIG. 13 (a), as described in FIG. 12 above, as the first processing step, the suspension fitting 20 and the suspension bolt 21 suspended by this are attached to the H-shaped steel F. Before, as a pre-process, first, the fireproof coating layer 28 is first formed on the entire exposed surface of the H-shaped steel F, and then, as shown in FIG. Is formed in the refractory coating layer 28, and as a third processing step, as shown in FIG. The bracket 20 and the suspension bolt 21 are fitted and the suspension bolt 21 is fastened to the suspension bracket 20, whereby the suspension bracket 20 is attached to the H-shaped steel F and the suspension bolt 21 is suspended by the suspension bracket 20.

  As described above, in the conventional structure, the notch 29 is formed in the fireproof coating layer 28, and the suspension fitting 20 and the suspension bolt 21 are fitted into the notch 29. Therefore, the notch 29 and the base material 20, A gap 29a is generated between the head 21 and the head 21 due to work errors, etc., and there is a possibility that hot air at the time of a fire enters from the gap 29a and touches the H-shaped steel F or the ceiling concrete slab S to reduce the yield strength. Maybe there was.

  Moreover, since many suspension bolts 21 are suspended on the H-shaped steel F at a pitch of 600 to 900 mm in the longitudinal direction, naturally, a number of corresponding notches 29 are formed in the fireproof coating layer 28 one by one at an accurate pitch. Therefore, the work of forming the notch 29 in the fireproof coating layer 28 is quite troublesome, and the fireproofing coating processing efficiency cannot be increased.

  The present invention proposes a refractory ceiling base material mounting apparatus that can eliminate the above-mentioned problems of the prior art, form a refractory coating layer with good fire resistance, and form the refractory coating layer by efficient work. It is intended.

  Means for solving the above problems will be described with reference numerals of the embodiments described later. The fireproof ceiling base material mounting apparatus according to claim 1 is a fireproof coating on H-shaped steel F which is a ceiling beam material of a building. In a fireproof ceiling base material mounting apparatus in which a layer is formed and a suspension bolt as a ceiling base material is suspended on the H-shaped steel F, a spacer hardware 2 is interposed between the H-shaped steel F and the ceiling suspension bolt 1 Then, the spacer hardware 2 is attached to the H-shaped steel F via the spacer support fitting 3, and a fireproof coating layer 4 is formed on the H-shaped steel F so that the lower portion 2a of the spacer hardware 2 is exposed. The ceiling suspension bolt 1 is suspended from the exposed portion 2a of the hardware 2.

  The refractory ceiling base material mounting apparatus according to claim 2, wherein the refractory coating layer 4 is attached to the H-shaped steel F by being sprayed on the H-shaped steel F by a spraying device or attached to the H-shaped steel F so as to be wound. It consists of the structure of Claim 1 which consists of cotton material 4B.

  In the refractory ceiling base material mounting apparatus according to claim 3, as shown in FIG. 3, the spacer support fitting 3 includes an upper wall portion 3a, a lower wall portion 3b opposite to the upper wall portion 3a, and a vertical wall portion 3c that connects both wall portions. And the opposing space between the upper wall portion 3a and the lower wall portion 3b is a lower flange insertion portion 3d for the lower flange 2F of the H-shaped steel F to be inserted into the upper wall portion 3a. A bolt screwing hole 6 for screwing the pressing bolt 5 is formed, and a screwing hole 7 for screwing the spacer hardware 2 is formed in the lower wall part 3b, and the bolt is screwed into the bolt screwing hole 6 of the upper wall part 3a. The structure according to claim 1 or 2, wherein the spacer support metal fitting 3 is attached to the H-shaped steel F by screwing the bolt 5 into pressure contact with the upper surface of the lower flange 2F inserted into the lower flange insertion portion 3d. Is.

  As shown in FIG. 3, the refractory ceiling base material mounting apparatus according to claim 4 includes an upper wall portion 3a of the spacer support bracket 3, a lower wall portion 3b opposite to the upper wall portion 3b, and a vertical wall portion 3c connecting the both wall portions. The reinforcing rib 8 is formed in the width direction both edge part of each of the upper wall part 3a, the vertical wall part 3c, and the lower wall part 3b so that it may show a cross-sectional U-shape even if it takes any cross section. It consists of a structure.

  In the fireproof ceiling base material mounting apparatus according to claim 5, the spacer hardware 2 includes a shaft-shaped main body 2 b having a predetermined length formed in accordance with the thickness of the fireproof coating layer 4, and a male screw formed on the upper portion thereof. The upper male screw portion 2c of the spacer metal fitting 2 is screwed into the screwing hole 7 of the spacer support fitting 3 attached to the H-shaped steel F. With the lower female thread portion 2d exposed, the sprayed rock wool material 4A is sprayed on the H-shaped steel F, or the felt-shaped rock wool material 4B is wound around the H-shaped steel F so that the fireproof coating layer 4 is wrapped around the H-shaped steel F. The structure according to any one of claims 1 to 4, wherein the ceiling suspension bolt 1 is screwed and connected to the lower female thread portion 2d of the spacer hardware 2 exposed from the lower portion of the fireproof coating layer 4. It become one.

  As shown in FIG. 6, the refractory ceiling base material mounting apparatus according to claim 6 includes a screw hole or the like for mounting a ceiling back installation 9 such as an electric wire or a water pipe to the vertical wall portion 3c of the spacer support fitting 3. The mounting hole 10 is provided, and the structure according to any one of claims 1 to 5 is provided.

  As shown in FIG. 11, the fireproof ceiling base material mounting apparatus according to claim 7 forms a fireproof covering layer on the ceiling concrete slab S of the building, and suspends a suspension bolt as a ceiling base material on the ceiling concrete slab S. In the refractory ceiling base material mounting apparatus configured as described above, a spacer hardware 2 is interposed between the ceiling concrete slab S and the ceiling suspension bolt 1 to attach the spacer hardware 2 to the ceiling concrete slab S, and the ceiling. The fireproof coating layer 4 is formed on the concrete slab S in a state where the lower part 2a of the spacer hardware 2 is exposed, and the ceiling suspension bolt 1 is suspended from the exposed portion 2a of the spacer hardware 2. .

  In the refractory ceiling base material mounting apparatus according to claim 8, the spacer hardware 2 includes a shaft-shaped main body portion 2b having a predetermined length formed according to the thickness of the refractory coating layer 4, and a male screw formed thereon. The upper male screw portion 2c of the spacer metal fitting 2 is screwed into the insert fitting 11 embedded in the ceiling concrete slab S, and the lower female screw portion 2d of the spacer metal fitting 2 is exposed. In such a state, the sprayed rock wool material 4A is sprayed on the H-shaped steel F, or the felt-like rock wool material 4B is wound around the H-shaped steel F to form the fireproof coating layer 4 on the ceiling concrete slab S, The structure according to claim 1, wherein the ceiling suspension bolt 1 is screwed and connected to the lower female thread portion 2 d of the spacer hardware 2 exposed from the lower portion of the fireproof coating layer 4. Is shall.

  According to the first aspect, the spacer metal 2 is interposed between the H-shaped steel F which is a ceiling beam material of the building and the ceiling suspension bolt 1, and the spacer metal 2 is connected to the H-shaped steel F via the spacer support fitting 3. In this state, the fire-resistant coating layer 4 is formed on the H-shaped steel F so that the lower part 2a of the spacer hardware 2 is exposed, and the ceiling suspension bolt 1 is suspended on the exposed portion 2a of the spacer hardware 2. Because of this, the H-shaped steel F and the spacer support fitting 3 are embedded without a gap by the fireproof coating layer 4, and the spacer hardware 2 attached to the spacer support fitting 3 is also connected to the ceiling suspension bolt 1. 2 is mostly embedded in the refractory coating layer 4 so that the H-shaped steel F is completely cut off from the outside air by the refractory coating layer 4 without any gaps. Not that the fire heat is propagated to H-section steel F, it can exhibit good fire capability.

  In general, the ceiling suspension bolts 1 are suspended from the H-shaped steel F at intervals of 600 to 900 mm in the longitudinal direction. However, according to the present invention, the spacer support bracket 3 is provided with a spacer at every predetermined pitch. Spacer hardware 2 for suspending ceiling suspension bolt 1 can be installed on H-shaped steel F by simply placing a unit with hardware 2 and screwing pressure bolt 5 into spacer support bracket 3. In this step, the refractory coating layer 4 can be efficiently formed because the refractory coating layer 4 is simply formed on the H-shaped steel F. Since the lower part 2a of the spacer hardware 2 is exposed from the fireproof coating layer 4, the ceiling suspension bolt 1 can be quickly and easily connected to the spacer hardware 2.

  The refractory ceiling base material mounting apparatus according to claim 2, wherein the refractory coating layer 4 is attached to the H-shaped steel F by being sprayed on the H-shaped steel F by a spraying device or attached to the H-shaped steel F so as to be wound. Since it is made of the cotton material 4B and the former is used, the workability is good because the rock wool material 4A is adhered to the H-shaped steel F by a spraying operation. In the latter case, since the rock wool material formed in a felt shape is wrapped around and attached to the H-shaped steel F, the appearance is good, and it is convenient to attach it to the H-shaped steel F that is conspicuous outside. Good.

  According to the third aspect of the present invention, the spacer support fitting 3 is formed in a lateral U-shape by the upper wall portion 3a, the lower wall portion 3b opposite to the upper wall portion 3a, and the vertical wall portion 3c connecting the both wall portions, and the upper wall portion 3a. The space between the lower wall portion 3b and the lower wall portion 3b is a lower flange insertion portion 3d for the lower flange 2F of the H-shaped steel F to be inserted, and a bolt screw hole 6 for screwing the pressing bolt 5 into the upper wall portion 3a is formed. The lower wall portion 3b is formed with a screw hole 7 for screwing the spacer metal piece 2. The spacer support fitting 3 is inserted into the lower flange 2F of the H-shaped steel F, and the pressing bolt 5 is inserted into the upper wall portion 3a. Since the spacer support fitting 3 can be attached to the H-shaped steel F simply by screwing it into the bolt screw-in hole 6, the work of attaching the spacer support fitting 3 to the H-shaped steel F can be performed quickly and easily.

  According to claim 4, the upper part 3 a of the spacer supporting metal 3, the lower wall part 3 b opposite to the upper wall part 3 b, and the vertical wall part 3 c that connects the two wall parts have a U-shaped cross section. Since the reinforcing ribs 8 are formed on both edges in the width direction of the wall 3a, the vertical wall 3c, and the lower wall 3b, the spacer support metal fitting 3 can be a ceiling suspension bolt, a field receiver, a field edge or a ceiling. Sufficient durability can be exerted against the weight of ceiling materials such as materials and the vibration and impact transmitted from the outside.

  According to claim 5, the spacer hardware 2 includes a shaft-shaped main body portion 2b having a predetermined length formed in accordance with the thickness of the fireproof coating layer 4, a male screw portion 2c formed on the upper portion thereof, and a lower portion thereof. The upper male screw portion 2c of the spacer metal piece 2 is screwed into the screw hole 7 of the spacer support fitting 3 attached to the H-shaped steel F, and the lower female screw portion 2d of the spacer metal piece 2 is exposed. In the state, the sprayed rock wool material 4A is sprayed on the H-shaped steel F, or the felt-like rock wool material 4B is wound around the H-shaped steel F so as to form the fireproof coating layer 4 on the H-shaped steel F. The operation of forming the fireproof coating layer 4 can be easily and quickly performed, and the ceiling suspension bolt 1 is screwed and connected to the lower female thread portion 2d of the spacer hardware 2 exposed from the lower portion of the fireproof coating layer 4. Because the can perform connection work of the spacer support fitting 3 of the ceiling hanger bolts 1 easy quickly.

  In addition, the spacer hardware 2 having the shaft-shaped main body portion 2b having the shaft length matched to the layer thickness of the fireproof coating layer 4 can be used. That is, the thickness of the refractory coating layer 4 is determined in accordance with the refractory time, and as the refractory time increases, the thickness of the refractory coating layer 4 increases in proportion to the increase in the refractory time. The main body portion 2b can sufficiently correspond to the thickness of the fireproof covering layer 4.

  According to the sixth aspect, since the mounting hole 10 such as a screw hole for mounting the ceiling installation object 9 such as an electric wire or a water pipe is provided in the vertical wall portion 3c of the spacer support fitting 3, the ceiling installation object 9 is provided. Is practically used because it is possible to attach the ceiling installation object 9 by using the spacer support fitting 3 and the attachment hole 10 provided in the vertical wall portion 3c. In addition, since there is little protrusion amount from the spacer support metal fitting 3 of the member for attaching the ceiling back installation thing 9, formation of the fireproof coating layer 4 is not hindered.

  According to the seventh aspect, a spacer hardware 2 is interposed between the ceiling concrete slab S and the ceiling suspension bolt 1, and the spacer hardware 2 is attached to the ceiling concrete slab S, and the ceiling concrete slab S is fireproof coated. Since the layer 4 is formed in a state where the lower part 2a of the spacer hardware 2 is exposed, and the ceiling suspension bolt 1 is suspended from the exposed portion 2a of the spacer hardware 2, the spacer hardware 2 attached to the ceiling concrete slab S is provided. Is embedded in the fireproof coating layer 4 leaving the lower part 2a of the spacer hardware 2 to which the ceiling suspension bolt 1 is connected, so that the surface of the ceiling concrete slab S is completely shielded from the outside air by the fireproof coating layer 4 without any gaps. Even if a fire occurs in the outside air, the fire heat is not transmitted to the ceiling concrete slab S, and the fire resistance is good. It can be exhibited.

  Moreover, according to this invention, the spacer metal object 2 is attached to the ceiling concrete slab S every 600-900 mm pitch to the ceiling concrete slab S, and the process of forming only the fireproof coating layer 4 on the surface of the ceiling concrete slab S in this state Therefore, the fireproof coating layer 4 can be formed efficiently. Since the lower part 2a of the spacer hardware 2 is exposed from the fireproof coating layer 4, the ceiling suspension bolt 1 can be quickly and easily connected to the spacer hardware 2.

  According to claim 8, the spacer hardware 2 includes a shaft-shaped main body 2b having a predetermined length formed in accordance with the thickness of the fireproof coating layer 4, a male screw portion 2c formed on the upper portion thereof, and a lower portion thereof. The upper male screw portion 2c of the spacer metal piece 2 is screwed into the insert fitting 11 embedded in the ceiling concrete slab S and the lower female screw portion 2d of the spacer metal piece 2 is exposed. The fireproof coating layer 4 is formed on the ceiling concrete slab S by spraying the cotton material 4A onto the H-shaped steel F or wrapping the felt-like rock wool material 4B around the H-shaped steel F. The ceiling suspension bolt 1 is screwed into the lower female screw portion 2d of the spacer hardware 2 exposed from the lower portion of the fireproof coating layer 4. Since it as sintering can be carried out easily quickly connecting operation of the spacer support fitting 3 of the ceiling hanging bolts 1.

  In addition, the spacer support fitting 3 having the shaft-shaped main body portion 2b having an axial length matching the thickness of the fireproof coating layer 4 can be used. That is, the thickness of the refractory coating layer 4 is determined in accordance with the refractory time, and as the refractory time increases, the thickness of the refractory coating layer 4 increases in proportion to the increase in the refractory time. The main body portion 2b can sufficiently correspond to the thickness of the fireproof covering layer 4.

It is use condition explanatory drawing shown in the partial cross section of 1st Embodiment of the fireproof ceiling base material attachment apparatus which concerns on this invention. It is front sectional drawing of the same use condition. It is the same exploded perspective view. It is the principal part expanded front sectional drawing. It is explanatory drawing which shows the formation procedure of the fireproof coating layer. It is front sectional drawing which shows the use condition of the other modification. It is use condition explanatory drawing shown in the partial cross section of 2nd Embodiment of the fireproof ceiling base material attachment apparatus which concerns on this invention. (A) And (b) is a figure which shows the fireproof coating material used in the 2nd embodiment. It is the same front sectional view. It is explanatory drawing which shows the formation procedure of the fireproof coating layer. It is front sectional drawing which shows the use condition of 3rd Embodiment of the fireproof ceiling base material attachment apparatus which concerns on this invention, and the principal part of 4th Embodiment. It is a use state explanatory drawing which shows a prior art and forms the fireproof coating layer of a fireproof ceiling base material attachment apparatus. It is explanatory drawing which shows the formation procedure of the fireproof coating layer.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a use state of a first embodiment of a fireproof ceiling base material mounting apparatus according to the present invention.

  In general, an H-shaped steel F, which is a ceiling beam material composed of an upper flange 1F and a lower flange 2F, and a web W connecting both of them is attached to the lower surface of a ceiling concrete slab S that is a ceiling frame of a steel frame or reinforced concrete building. .

  The H-shaped steel F is used to suspend a suspension bolt as a ceiling base material. In the present invention, a spacer hardware 2 is provided between the H-shaped steel F and the ceiling suspension bolt 1. Intervene. In order to attach the spacer hardware 2 to the H-shaped steel F, the spacer support fitting 3 is fixed to the H-shaped steel F, and the spacer hardware 2 is attached to the H-shaped steel F via the spacer support fitting 3.

  After that, the fireproof coating layer 4 is formed on the H-shaped steel F in a state where the lower part 2a of the spacer hardware 2 is exposed, and the ceiling suspension bolt 1 is suspended on the exposed portion 2a of the spacer hardware 2.

  Conventionally, as described above, a fireproof coating layer is first formed on the H-shaped steel F, and then the ceiling suspension bolt 21 is attached to the H-shaped steel F. However, in the present invention, the ceiling suspension bolt 1 and Between the H-shaped steel F, the spacer hardware 2 and the spacer supporting metal 3 for fixing the spacer metal 2 to the H-shaped steel F are interposed, and before forming the fireproof coating layer 4, the spacer hardware 2 and the spacer supporting metal 3 is first preceded by the H-shaped steel F, and then the refractory coating layer 4 is retrofitted.

  FIG. 3 shows the structure of the spacer hardware 2 and the spacer support fitting 3 in an easy-to-understand manner. First, the structure of the spacer support fitting 3 will be described. The spacer support fitting 3 is opposed to the upper wall portion 3a. The lower wall portion 3b and the vertical wall portion 3c connecting the two wall portions are formed in a U shape in the horizontal direction, and the opposing space portion between the upper wall portion 3a and the lower wall portion 3b serves as the lower flange 2F (see FIG. 1 and FIG. 2), a lower flange insertion portion 3d for insertion, a bolt screw hole 6 for screwing the pressing bolt 5 into the upper wall portion 3a is formed, and the spacer hardware 2 is screwed to the lower wall portion 3b. For this purpose, a screw hole 7 is formed.

  The spacer support fitting 3 is formed by bending a metal plate. In order to reinforce the strength of the spacer support fitting 3 made of a metal plate, the spacer support fitting 3 has an upper wall portion 3a and a lower surface opposite to the upper wall portion 3a. At both edges in the width direction of the upper wall 3a, the vertical wall 3c, and the lower wall 3b so that any cross section of the wall 3b and the vertical wall 3c connecting the both walls has a U-shaped cross section. The reinforcing rib 8 is integrally formed by bending. Then, as shown in FIG. 1, FIG. 2, or FIG. 4, the lower flange 2F is inserted into the lower flange insertion portion 3d by screwing the pressing bolt 5 into the bolt screw hole 6 of the upper wall portion 3a of the spacer support fitting 3. The spacer support fitting 3 is attached to the H-shaped steel F in pressure contact with the upper surface.

  The spacer hardware 2 includes a shaft-shaped main body portion 2b having a predetermined length formed in accordance with the thickness of the fireproof coating layer 4 to be described in detail later, a male screw portion 2c formed on the upper portion thereof, and a female screw formed on the lower portion thereof. The upper male screw portion 2c of the spacer metal fitting 2 is screwed into the screw hole 7 of the spacer support fitting 3 attached to the H-shaped steel F, and the spacer metal fitting 2 is inserted into the H-shaped steel F via the spacer support fitting 3. It is supposed to be attached to.

  At this time, in consideration of strength, as shown in FIG. 4, the upper wall portion 3a of the spacer support fitting 3 is formed with a smaller protruding amount from the vertical wall portion 3c side than the lower wall portion 3b. The bolt screw hole 6 formed in the upper wall portion 3 a is formed closer to the vertical wall portion 3 c than the screw hole 7 formed in the lower wall portion 3 b, and the pressing bolt 5 is screwed into the bolt screw hole 6. By pressing against the upper surface of the lower flange 2F inserted into the lower flange insertion portion 3d, the upper wall portion 3a is prevented from being lifted by the reaction force, and the screw of the lower wall portion 3b is prevented. Consideration is given so that the spacer hardware 2 to be screwed into the stop hole 7 is located at the center in the width direction of the lower flange 2F of the H-shaped steel F.

  After the spacer support fitting 3 and the spacer metal fitting 2 are attached to the H-shaped steel F as described above, as shown in FIG. 1, FIG. 2, or FIG. 4, the entire surface of the H-shaped steel F, the spacer support fitting 3 and the spacer metal fitting 2 The refractory coating layer 4 is formed so as to cover the refractory layer. When the refractory coating layer 4 is formed, the lower part 2a of the spacer hardware 2 is exposed.

  In the first embodiment of the present invention, as shown in FIG. 1, FIG. 2 or FIG. 4, the fireproof coating layer 4 is sprayed rock wool attached to the H-shaped steel F, the spacer support fitting 3 and the spacer hardware 2. This rock wool is made of the material 4A and is sprayed with high-pressure air by a well-known spraying device such as a spraying air gun in a state where rock wool is defibrated and mixed with cement milk or the like. The material 4A is adhered to the H-shaped steel F, and the rock wool material 4A is laminated on the H-shaped steel F to a predetermined thickness.

  The layer thickness L1 (FIG. 4) of the fireproof coating layer 4 is regulated by the heat resistance time at the time of the fire occurrence, and in order to satisfy the heat resistance capability of 1 hour, the layer thickness is 20 mm: 2 hours heat resistance is 45 mm. It is said that the layer thickness and heat resistance for 3 hours must be formed to a layer thickness of 65 mm.

  And the axial length L2 (FIG. 4, FIG. 3) of the axial main-body part 2b of the spacer metal object 2 must be decided substantially proportional to the layer thickness L1 of this fireproof coating layer 4, and it is heat-resistant for 1 hour. When the layer thickness L1 is 20 mm, the shaft length L2 of the shaft-shaped main body 2b is 50 mm. When the layer thickness L1 that is heat resistant for 2 hours is 45 mm, the shaft length L2 of the shaft-shaped main body 2b is 70 mm, When the layer thickness L1 that is heat resistant for 3 hours is 65 mm, the shaft length L2 of the shaft-shaped main body 2b is 90 mm, so that the lower part 2a of the spacer hardware 2 is not affected by the change in the layer thickness. The axial length of 25 mm to 30 mm is exposed from the fireproof coating layer 4.

  As described above, since the spacer hardware 2 is exposed at the lower portion of the fireproof covering layer 4, the ceiling suspension bolt 1 is screwed and suspended on the female thread portion 2d of the exposed portion 2a, and thereafter, as shown in FIG. In the same manner as in the prior art, a hanger 22 is fixed to the lower end portion of the ceiling suspension bolt 1 with a nut 23, a field edge receiver 24 is engaged with the hanger 22, and a clip 25 is connected to the field edge receiver 24. A field edge 26 is attached, and a ceiling material 27 is attached to the field edge 26 by nailing or bonding.

  FIG. 5 shows a procedure for forming the fireproof coating layer 4 of the first embodiment of the present invention. First, as shown in FIG. 5A, the spacer support fitting 3 is attached to the lower flange 2F of the H-shaped steel F and the pressing bolt 5 is attached. At the same time, the spacer hardware 2 is fixed to the spacer hardware 2 by screwing. In addition, although the attachment hole 10 is formed in the vertical wall part 3c of the spacer support metal fitting 3, this role is mentioned later.

  Next, as shown in (b), the sprayed rock wool material 4A for forming the fireproof coating layer 4 is formed so as to cover the H-shaped steel F, the spacer supporting bracket 3 and the spacer hardware 2, and the lower part 2a of the spacer hardware 2 In the exposed state, the sprayed rock wool material 4A is sprayed and adhered to a layer thickness adapted to the required heat resistant time. Thus, the fire-resistant coating layer 4 that completely shields the H-shaped steel F from the outside air is formed on the H-shaped steel F by screwing the ceiling suspension bolt 1 into the female threaded portion 2d of the lower part 2a of the spacer hardware 2 exposed from the fire-resistant coating layer 4A. Is done.

  FIG. 6 shows a modification of the first embodiment of the present invention. The mounting hole 10 shown in FIG. 5 (a) attaches the ceiling suspension bolt 1 to the H-shaped steel F and uses the back of the ceiling. For example, for installing a ceiling installation object 9 such as a wiring or a water pipe, which is conventionally installed, an attachment 13 such as an L metal fitting is attached to the attachment hole 10 with a fastening bolt 12. A short mounting bolt 14 is attached, and the spraying process of the above-described sprayed rock wool material 4A is performed in this state. Since the mounting bolt 14 extending downward from the mounting hole 10 is short, it does not hinder the spraying operation of the sprayed rock wool material 4A. After the spraying process of the sprayed rock wool material 4A, the ceiling back installation object 9 is attached to the lower part 14a of the mounting bolt 14 exposed below the rock wool material 4A via an appropriate installation fitting 15.

  7 to 10 show a second embodiment of the present invention. The difference from the first embodiment is that in the first embodiment, the refractory coating layer 4 is formed by a sprayed rock wool material 4A. However, in the second embodiment, the fireproof coating layer 4 is different only in that it is formed of the felt-like rock wool material 4B, and the other structure is exactly the same as that of the first embodiment. The components having the same roles as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description of the structure is omitted in principle, and the configuration of the fireproof coating layer 4 is the difference between the two. Only will be described.

  The fireproof coating layer 4 of the second embodiment shown in FIG. 7 or FIG. 9 is made of a felt-like rock wool material 4B, and is formed by forming a rock wool material (rock wool) into a felt shape to form a sheet. As shown in FIG. 8 (a), there is a product made from felt-like rock wool material 4B in a roll sheet shape, or a product made into a rectangular sheet shape as shown in FIG. 8 (b). . As shown in FIG. 7 or FIG. 8, the felt-like rock wool material 4B is wound so as to cover the H-shaped steel F, the spacer support fitting 3 and the spacer metal piece 2 without gaps, and is fixed to the ceiling concrete slab by the fixing pin 16 or an adhesive. By fixing the portion in contact with S, this felt-like rock wool material 4B is laminated to a predetermined thickness. The relationship between the thickness of the fireproof covering layer 4 made of the felt-like rock wool material 4B and the axial length of the shaft-like main body 2b of the spacer hardware 2 is the same as that in the first embodiment described with reference to FIG. .

  FIG. 10 shows the procedure for forming the refractory coating layer 4 of the second embodiment, which corresponds to FIG. 5 of the first embodiment. However, as a precaution, first, as shown in FIG. The spacer support fitting 3 is fixed to the lower flange 2F of the H-shaped steel F by screwing the pressing bolt 5 and at the same time, the spacer metal piece 2 is fixed to the spacer metal piece 2 by screwing.

  Next, as shown in (b), the sprayed rock wool material 4A for forming the fireproof coating layer 4 is formed so as to cover the H-shaped steel F, the spacer supporting bracket 3 and the spacer hardware 2, and the lower part 2a of the spacer hardware 2 In the exposed state, the felt-like rock wool 4B is wound around the layer thickness according to the required heat-resistant time, and the part in contact with the ceiling concrete slab S is fixed with the fixing pin 16 or an adhesive, thereby forming the felt-like rock. Cotton material 4B is adhered. Thus, the fire-resistant coating layer 4 that completely shields the H-shaped steel F from the outside air is formed on the H-shaped steel F by screwing the ceiling suspension bolt 1 into the female threaded portion 2d of the lower part 2a of the spacer hardware 2 exposed from the fire-resistant coating layer 4A. Is done. Unlike the sprayed rock wool material 4A, the felt-like rock wool material 4B has a relatively flat surface, and the appearance is good, and the felt-like rock wool material 4B has a colored rock wool material on the surface. If the layers are stacked, the appearance on the exterior will be improved.

  FIG. 11 shows a third embodiment of the present invention, in which a spacer hardware 2 is interposed between the ceiling concrete slab S and the ceiling suspension bolt 1, and the spacer hardware 2 is attached to the ceiling concrete slab S. The fireproof covering layer 4 is formed on the ceiling concrete slab S in a state where the lower portion 2a of the spacer hardware 2 is exposed, and the ceiling suspension bolt 1 is suspended on the exposed portion 2a of the spacer hardware 2. . Since the spacer hardware 2 attached to the ceiling concrete slab S is embedded in the fireproof coating layer 4 leaving the lower part 2a of the spacer hardware 2 to which the ceiling suspension bolt 1 is connected, the surface of the ceiling concrete slab S is covered with the fireproof coating layer 4. Therefore, even if a fire occurs in the outside air without any gaps, the fire heat is not transmitted to the ceiling concrete slab S, and good fire resistance can be exhibited. The ceiling concrete slab S is formed by overlaying a concrete mortar Sb on a wavy deck plate Sa.

  In addition, according to the third embodiment, the ceiling concrete slab S is attached to the ceiling concrete slab S at intervals of 600 to 900 mm, and the fireproof coating layer 4 is formed on the surface of the ceiling concrete slab S in this state. Since it is only a process to do, the fireproof coating layer 4 can be formed efficiently. Since the lower part 2a of the spacer hardware 2 is exposed from the fireproof coating layer 4, the ceiling suspension bolt 1 can be quickly and easily connected to the spacer hardware 2. Specifically, as in the first or second embodiment, the spacer hardware 2 is formed on the upper portion of the shaft-shaped main body 2b having a predetermined length formed in accordance with the thickness of the fireproof coating layer 4. The upper male screw portion 2c of the spacer hardware 2 is screwed into the insert fitting 11 embedded in the ceiling concrete slab S, and the lower portion 2a of the spacer hardware 2 is exposed. In such a state, the fireproof covering layer 4 is formed on the ceiling concrete slab S by spraying the blown rock material 4A onto the H-shaped steel F or wrapping the felt-like rock wool material 4B around the H-shaped steel F. To do. Therefore, the operation of forming the fireproof coating layer 4 can be performed easily and quickly, and the ceiling suspension bolt 1 is screwed and connected to the lower female thread portion 2d of the spacer hardware 2 exposed from the lower portion of the fireproof coating layer 4. Therefore, the connection work of the spacer support fitting 3 of the ceiling suspension bolt 1 can be performed easily and quickly.

  In addition, the spacer support fitting 3 having the shaft-shaped main body portion 2b having an axial length matching the thickness of the fireproof coating layer 4 can be used. That is, the thickness of the refractory coating layer 4 is determined in accordance with the refractory time. As the refractory time increases, the thickness of the refractory coating layer 4 increases in proportion to the increase in the refractory time. The shaft-shaped main body 2b can sufficiently correspond to the layer thickness of the fireproof coating layer 4.

  In FIG. 11, a partial view taken out in a portion indicated by an arrow a shows a main part of the fourth embodiment of the present invention, and the configuration different from the third embodiment is that the fireproof coating layer 4 is the third embodiment. In the fourth embodiment, it is composed of a felt-like rock wool material 4B, whereas it is composed of the sprayed rock wool material 4A. That is, in the fourth embodiment, the fireproof covering layer 4 is formed on the ceiling concrete slab S by attaching the felt-like rock wool material 4B to the ceiling concrete slab S with an adhesive or the fixing pin 16. Unlike the sprayed rock wool material 4A, the felt-like rock wool material 4B has a relatively flat surface, so that the appearance of the felt-like rock wool material 4B is good. If the materials are laminated, the appearance of the appearance will be further improved.

S Ceiling concrete slab F H-shaped steel 2F Lower flange 1 of H-shaped steel 2 Ceiling suspension bolt 2 Spacer hardware 2a Spacer hardware lower portion 2b Spacer hardware shaft-shaped main body 2c Spacer hardware male thread 2d Spacer hardware female thread 3 Spacer support bracket 3a Spacer support bracket upper wall portion 3b Spacer support bracket lower wall portion 3c Spacer support bracket vertical wall portion 3d Spacer support bracket lower flange insertion portion 4 Fireproof coating layer 4A Sprayed rock wool material 4B Felt-like rock wool material 5 Press bolt 6 Bolt screw-in hole 7 Screw-fastening hole 8 Reinforcement rib of spacer hardware 9 Installation object 10 Mounting hole 11 Insert fitting

Claims (8)

  A fireproof ceiling base material mounting apparatus in which a fireproof covering layer is formed on an H-shaped steel that is a ceiling beam material of a building, and a suspension bolt that is a ceiling base material is suspended on the H-shaped steel. And a spacer metal fitting is attached to the H-shaped steel via a spacer support bracket, and a fireproof coating layer is formed on the H-shaped steel with the lower portion of the spacer metal hardware exposed, A fireproof ceiling base material mounting device that suspends ceiling suspension bolts from exposed parts of spacer hardware.  The refractory ceiling base material mounting apparatus according to claim 1, wherein the fireproof covering layer is made of a sprayed rock wool material that is attached to the H-shaped steel by being sprayed by a spraying device or a felt-like rock wool material that is attached so as to be wound around the H-shaped steel.   The spacer support bracket is formed in a lateral U shape by an upper wall portion, a lower wall portion facing the upper wall portion, and a vertical wall portion connecting both wall portions, and the opposing space portion between the upper wall portion and the lower wall portion is formed as described above. A lower flange insertion part for insertion of the lower flange of the H-shaped steel, a bolt screw hole for screwing a pressing bolt into the upper wall part, and a screw hole for screwing a spacer hardware into the lower wall part The spacer support fitting is attached to the H-shaped steel by screwing a pressing bolt into a bolt screwing hole in the upper wall portion and press-contacting the upper surface of the lower flange inserted into the lower flange insertion portion. Or the fireproof ceiling base-material attachment apparatus of 2 or 2.   The upper wall portion, the vertical wall portion, and the lower wall portion so as to exhibit a U-shaped cross section regardless of the cross section of the upper wall portion of the spacer support bracket, the lower wall portion facing the upper portion, and the vertical wall portion connecting both wall portions. The refractory ceiling base material mounting apparatus according to claim 3, wherein reinforcing ribs are formed on both edges in the width direction of the refractory ceiling.   The spacer hardware consists of a shaft-shaped main body portion having a predetermined length formed in accordance with the thickness of the fireproof coating layer, a male screw portion formed on the upper portion thereof, and a female screw portion formed on the lower portion thereof. Screw the upper male thread part of the spacer hardware into the screw hole of the spacer support fitting attached to the steel mold, and spray the sprayed rock wool material onto the H-shaped steel with the lower part of the spacer hardware exposed, or felt-like rock wool 5. A fireproof coating layer is formed on the H-shaped steel so as to wind the material around the H-shaped steel, and a ceiling suspension bolt is screwed into and connected to the lower female thread portion of the spacer hardware exposed from the fireproof coating layer. The refractory ceiling base material mounting apparatus according to any one of the above.   The refractory ceiling base material mounting device according to any one of claims 1 to 5, wherein a mounting hole such as a screw hole for mounting a ceiling back installation such as an electric wire or a water pipe is provided in a vertical wall portion of the spacer support bracket. .   In a fireproof ceiling base material mounting apparatus in which a fireproof covering layer is formed on a ceiling concrete slab of a building and a suspension bolt as a ceiling base material is suspended on the ceiling concrete slab, the ceiling concrete slab and the ceiling suspension bolt The spacer hardware is attached to the ceiling concrete slab with a spacer metal in between, and a fireproof coating layer is formed on the ceiling concrete slab with the lower portion of the spacer hardware exposed, and the exposed portion of the spacer hardware is formed. A fireproof ceiling base material mounting device designed to hold ceiling suspension bolts.   The spacer hardware consists of a shaft-shaped main body portion having a predetermined length formed in accordance with the thickness of the fireproof coating layer, a male screw portion formed on the upper portion thereof, and a female screw portion formed on the lower portion thereof. Screw the upper male thread part of the spacer hardware into the insert fitting embedded in the concrete slab, and with the lower female thread part of the spacer hardware exposed, either spray the blown rock material onto the ceiling concrete slab, or apply the felt-like rock wool material. A fireproof coating layer is formed on the ceiling concrete slab so as to be wound around the ceiling concrete slab, and a ceiling suspension bolt is screwed and connected to a lower female thread portion of a spacer hardware exposed from the lower portion of the fireproof coating layer. The fireproof ceiling base material attaching apparatus according to 7.

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