JP6534852B2 - Fireproof ceiling base material mounting device - Google Patents

Description

  The present invention relates to a fireproof ceiling foundation for forming a fireproof covering layer on a H-shaped steel or ceiling concrete slab in a ceiling foundation material formed by suspending a ceiling suspension bolt on an H-shaped steel or ceiling concrete slab which is a ceiling beam of a building. The present invention relates to the improvement of a material mounting device.

  Generally, in a fireproof building made of steel frame or reinforced concrete, H-shaped steel and ceiling concrete slab which are ceiling beams hanging ceiling suspension bolt which is a ceiling base material prevent decrease in yield strength caused by temperature rise at the time of fire In order to prevent this, fireproof coating is applied to the exposed surface of H-shaped steel and ceiling concrete slabs.

  FIG. 12 shows a conventional ceiling base material attaching apparatus before fireproof coating processing, and the lower surface of a ceiling concrete slab (a concrete mortar laminated on a deck plate) S which is a ceiling body is a ceiling beam Supported by H-shaped steel F.

  The H-shaped steel F comprises an upper flange 1F, a lower flange 2F opposed thereto, and a web W connecting the two, and utilizing the lower flange 2F, upper and lower horizontal pieces 20a and 20b and vertical pieces 20c The U-shaped suspension fitting 20 is inserted, the suspension bolt 21 is screwed into the lower horizontal piece 20b, and the distal end of the suspension bolt 21 is pressed against the lower surface of the lower flange 2F, thereby attaching the suspension bracket 20 to the lower flange 2F. Attach the hanger 22 to the lower end of the suspension bolt 21 with the nut 23, engage the field edge receiver 24 with the hanger 22, attach the field edge 26 to the field edge receiver 24 via the clip 25, and The ceiling material 27 is attached to the edge 26 by nailing or bonding.

  In order to apply the fireproof coating process to the ceiling base material having such a conventional structure, the fireproof coating process is conventionally performed according to the procedure shown in FIG. That is, as shown in (a) of FIG. 13, in the first treatment process, as described above with reference to FIG. 12, the suspension fitting 20 and the suspension bolt 21 suspended therefrom are attached to the H-shaped steel F Before that, as a pre-process, first, the fireproof covering layer 28 is formed on the entire exposed surface of the H-shaped steel F, and then, as shown in FIG. The notch 29 is formed in the fireproof covering layer 28 to the extent that can be inserted, and as the third process step, as shown in (c) of FIG. The fitting 20 and the suspension bolt 21 are fitted, and the suspension bolt 20 is tightened to the suspension bracket 20 to attach the suspension bracket 20 to the H-shaped steel F and suspend the suspension bolt 21 to the suspension bracket 20.

  As described above, in the conventional structure, the notch 29 is formed in the fireproof covering layer 28 and the suspension fitting 20 and the suspension bolt 21 are fitted into the notch 29. Therefore, the notch 29 and these base materials 20, A gap 29a will be generated due to a work error etc. between this and the space, and hot air at the time of a fire may enter from this gap 29a and touch the H-shaped steel F or the ceiling concrete slab S to lower the yield strength. Maybe there was.

  Moreover, since a large number of suspension bolts 21 are suspended from the H-shaped steel F in the longitudinal direction at a pitch of 600 to 900 mm, naturally, many notches 29 corresponding thereto are cut out in the fire protection coating layer 28 one by one at an accurate pitch. There is a drawback that the operation of forming the notch 29 in the fireproof coating layer 28 is rather complicated, and the fireproof coating processing efficiency can not be increased.

  The present invention solves the problems of the prior art and proposes a fireproof ceiling foundation mounting device capable of forming a fireproof covering layer having a good fireproofing ability and forming a fireproof covering layer by an efficient operation. Purpose.

The means for solving the above problems will be described with reference to the later-described embodiment, and the fire-resistant ceiling base material mounting device according to claim 1 has a fireproof coating on H-shaped steel F which is a ceiling beam of a building. In the fire-resistant ceiling base material attaching apparatus which forms a layer and suspends a suspension bolt which is a ceiling base material on the above-mentioned H-shaped steel F, a spacer supporting bracket 3 is provided between the above-mentioned H-shaped steel F and the ceiling hanging bolt 1 Spacer hardware 2 is interposed , and as shown in FIG. 3, the spacer support fitting 3 is U-shaped in the horizontal direction by the upper wall portion 3a, the lower wall portion 3b opposed thereto, and the vertical wall portion 3c connecting both wall portions. The space between the upper wall portion 3a and the lower wall portion 3b is a lower flange insertion portion 3d for insertion of the lower flange 2F of the H-shaped steel F, and the pressing bolt 5 is screwed into the upper wall portion 3a. Bolt screw holes 6 are formed for A screwing hole 7 for screwing the spacer metal 2 is formed in the wall portion 3b, and the pressing bolt 5 is screwed into the bolt screw hole 6 of the upper wall portion 3a to insert the lower portion into the lower flange insertion portion 3d. The shaft-like main body of a predetermined length formed in pressure contact with the upper surface of the flange 2F to attach the spacer support fitting 3 to the H-shaped steel F, and the spacer fitting 2 formed according to the layer thickness of the fireproof coating layer 4 The upper external thread of the spacer metal 2 in the screwing hole 7 of the spacer support 3 made of the section 2b, the external thread 2c formed in the upper part, and the internal thread 2d formed in the lower part In the state where the lower internal thread portion 2d of the spacer metal 2 is exposed by screwing the portion 2c, the sprayed rock wool material 4A is sprayed onto the H-type steel F or the felt-like rock wool material 4B A fireproof covering layer 4 is formed on the above H type steel F so as to be wound around the above H type steel F, and a ceiling suspension bolt 1 is screwed and connected to a lower internal thread portion 2d of the spacer metal 2 exposed from the lower part of the fireproof covering layer 4 The ceiling suspension bolt 1 is suspended from the exposed portion 2 a of the spacer metal object 2.

The fireproof ceiling base material mounting apparatus according to claim 2 is, as shown in FIG. 3, an upper wall 3a of the spacer support 3 and a vertical wall 3c connecting the lower wall 3b opposite thereto and the both walls. any cross-section of the take U-shaped cross-section to exhibit as the upper wall 3a, according to claim 1, the vertical wall portion 3c and the lower wall portion both widthwise edges reinforcing ribs 8 of each of 3b is formed It consists of a structure.

The fireproof ceiling foundation material attachment device according to claim 3 is, as shown in FIG. 6, a screw hole or the like for attaching 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 also claim 1 comprising a mounting hole 10 provided is made of a structure according to 2.

The fireproof ceiling foundation material attachment device according to claim 4 forms a fireproof covering layer on a ceiling concrete slab S of a building as shown in FIG. 11, and suspends a suspension bolt which is a ceiling foundation material on the ceiling concrete slab S. In the fireproof ceiling base material mounting device, the spacer hardware 2 is interposed between the ceiling concrete slab S and the ceiling suspension bolt 1 , and the spacer hardware 2 is adjusted to the layer thickness of the fireproof covering layer 4. The insert fitting 11 embedded in the ceiling concrete slab S comprises a shaft-shaped main body 2b of a predetermined length, an externally threaded portion 2c formed at the upper portion thereof, and an internally threaded portion 2d formed at the lower portion thereof. In the state where the upper external thread portion 2c of 2 is screwed in and the lower internal thread portion 2d of the spacer fitting 2 is exposed, the blown concrete material 4A is used as the above-mentioned ceiling concrete A fireproof covering layer 4 is formed on the ceiling concrete slab S by spraying on a rub S or winding a felt-like rock wool material 4B on the ceiling concrete slab S, and a spacer metal exposed from the lower part of the fireproof covering layer 4 The ceiling suspension bolt 1 is screwed into and connected to the lower female screw portion 2d of 2, and the ceiling suspension bolt 1 is suspended from the exposed portion 2a of the spacer fitting 2.

According to the fireproof ceiling base material mounting device according to claim 1 , the spacer metal object 2 is interposed between the H-shaped steel F which is the ceiling beam material of the building and the ceiling suspension bolt 1, and the spacer metal object 2 is used as a spacer support bracket. Attached to the H-shaped steel F through 3 and in this state, the fireproof covering layer 4 is formed on the H-shaped steel F so as to expose the lower portion 2a of the spacer metal 2, and the exposed portion 2a of the spacer metal 2 is formed. Since the ceiling suspension bolt 1 is to be suspended, the H-shaped steel F and the spacer support 3 are embedded without gaps by the fireproof covering layer 4 and the spacer 2 attached to the spacer support 3 is also suspended from the ceiling Since the majority is embedded in the fireproof covering layer 4 except for the lower portion 2a of the spacer metal 2 to which the bolt 1 is connected, the H-type steel F is completely shielded from the outside air without gaps by the fireproof covering layer 4 It is, even if a fire occurs in the outside air, not that the fire heat is propagated to H-section steel F, can exhibit good fire capability.

Moreover, according to the fireproof ceiling foundation material attachment device according to the present invention, in general, the ceiling suspension bolt 1 is suspended from the H-shaped steel F at every 600 to 900 mm pitch in the longitudinal direction. According to the above, a spacer metal for suspending the ceiling suspension bolt 1 only by arranging a unit having the spacer metal fitting 2 attached to the spacer support metal fitting 3 at predetermined pitches and screwing the pressing bolt 5 into the spacer support metal fitting 3 2 can be installed in the H-type steel F, and in this state, it is a step of only forming the fire-resistant covering layer 4 on the H-type steel F, so the fire-resistant covering layer 4 can be formed efficiently. And since the lower part 2a of the spacer metal object 2 is exposed from the fireproof coating layer 4, the ceiling suspension bolt 1 can be connected with the spacer metal object 2 quickly and easily.
Furthermore, according to the present invention, the spacer support fitting 3 is formed in a U-shape in the horizontal direction by the upper wall portion 3a, the lower wall portion 3b opposed thereto, and the vertical wall portion 3c connecting the both wall portions. The space between 3a and the lower wall 3b is the lower flange insertion part 3d for inserting the lower flange 2F of the H-shaped steel F, and the upper wall 3a is formed with the bolt screw hole 6 for screwing the pressure bolt 5 therein. And the lower wall portion 3b is formed with a screwing hole 7 for screwing the spacer metal 2, and the spacer support fitting 3 is inserted into the lower flange 2F of the H-shaped steel F and the pressing bolt 5 is mounted on the upper wall Since the spacer support bracket 3 can be attached to the H-shaped steel F simply by screwing it into the bolt screw hole 6 of 3a, the mounting work of the unit having the spacer bracket 2 attached to the spacer support bracket 3 to the H-shaped steel F can be quickly performed. It can be carried out in.
Furthermore, according to the present invention, the spacer metal member 2 comprises a shaft-shaped main body 2b of a predetermined length formed in accordance with the layer thickness of the fireproof covering layer 4, an external thread 2c formed on the top, The upper external thread 2c of the spacer fitting 2 is screwed into the screwing hole 7 of the spacer support fitting 3 formed of the internal thread 2d formed in the lower part and attached to the H-shaped steel F, and the lower internal thread 2d of the spacer fitting 2 is In a state where it is exposed, the refractory rocking material 4A is sprayed onto the H-type steel F, or the felt-like rock wool material 4B is wound around the H-type steel F to form the fireproof covering layer 4 on the H-type steel F. Therefore, the work of forming the fireproof coating layer 4 can be performed easily and quickly, and the ceiling suspension bolt 1 is screwed into and connected to the lower internal thread portion 2d of the spacer hardware 2 exposed from the lower part of the fireproof coating layer 4. Because the way, it is possible to perform linking operations of the spacer support fitting 3 of the ceiling hanger bolts 1 easy quickly.
Furthermore, according to the present invention, the fireproof covering layer 4 is attached to the H-shaped steel F by spraying it with a blowing device by means of a blowing device, or from the felt-like rocking material 4B attached as wound around the H-shaped steel F. In the case of the former, since the rock wool material 4A is attached to the H-shaped steel F by the spraying operation, the workability is good. In the case of the latter, since the rocking material is formed in a felt-like shape in advance and wound around the H-shaped steel F, the appearance is good, and it is convenient to attach to the H-shaped steel F which is easily visible to the outside. Good.
Moreover, according to the present invention, the spacer metal object 2 having the axial main portion 2b of the axial length adjusted to the layer thickness of the fireproof coating layer 4 can be used. That is, the layer thickness of the fireproof coating layer 4 is determined in accordance with the fireproof time, and the thickness of the fireproof coating layer 4 becomes thick substantially in proportion to the increase of the fireproof time. The main body portion 2 b can sufficiently correspond to the layer thickness of the fireproof covering layer 4.

According to claim 2 , the upper wall portion 3a of the spacer support 3 and the lower wall portion 3b opposite thereto and the vertical wall portion 3c connecting the both wall portions have a U-shaped cross section. Since the reinforcing ribs 8 are formed on both widthwise edges of each of the wall 3a, the vertical wall 3c and the lower wall 3b, the spacer support fitting 3 can be a ceiling suspension bolt, an edge support, an edge or a ceiling It is possible to exhibit sufficient durability against the load of the ceiling base material such as wood and the vibration and impact transmitted from the outside.

According to claim 3 , the vertical wall portion 3c of the spacer support 3 is provided with the mounting hole 10 such as a screw hole for mounting the ceiling back installation 9 such as a wire or a water pipe. When it is desired to place the ceiling under the ceiling, it is practical because the installation under the ceiling can be attached by the mounting holes 10 provided in the vertical wall portion 3c using the spacer support fitting 3. In addition, since the protrusion amount from the spacer support metal fitting 3 of the member for attaching the ceiling back installation thing 9 is small, it does not interfere in formation of the fireproof coating layer 4. As shown in FIG.

According to the fourth aspect , the spacer metal fitting 2 is attached to the ceiling concrete slab S with the spacer metal fitting 2 interposed between the ceiling concrete slab S and the ceiling suspension bolt 1, and the ceiling concrete slab S is fireproofed Since the layer 4 is formed with the lower portion 2a of the spacer metal 2 exposed, and the ceiling suspension bolt 1 is suspended from the exposed portion 2a of the spacer metal 2, the spacer metal 2 attached to the ceiling concrete slab S Is embedded in the fireproof covering layer 4 except for 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 completely shielded from the outside air without gaps by the fireproof covering layer 4 Even if a fire occurs in the outside air, the heat of the fire is not transmitted to the ceiling concrete slab S and good fire resistance It can be exhibited.

Furthermore , according to the present invention, the spacer metal fitting 2 is attached to the ceiling concrete slab S every 600 to 900 mm pitch to the ceiling concrete slab S, and in this state, only the step of forming the fireproof covering layer 4 on the surface of the ceiling concrete slab S Therefore, the fireproof covering layer 4 can be formed efficiently. And since the lower part 2a of the spacer metal object 2 is exposed from the fireproof coating layer 4, the ceiling suspension bolt 1 can be connected with the spacer metal object 2 quickly and easily.

Furthermore , according to the present invention , the spacer metal member 2 comprises a shaft-shaped main body 2b of a predetermined length formed in accordance with the layer thickness of the fireproof covering layer 4, an external thread 2c formed on the upper portion, and The upper external thread 2c of the spacer fitting 2 is screwed into the insert fitting 11 embedded in the ceiling concrete slab S, and the lower internal thread 2d of the spacer fitting 2 is exposed. As the fireproof covering layer 4 is formed on the ceiling concrete slab S by spraying the sprayed rock wool material 4A on the ceiling concrete slab S or winding the felt-like rock wool material 4B on the ceiling concrete slab S, The work of forming the fireproof covering layer 4 can be carried out easily and quickly, and the lower female of the spacer metal 2 exposed from the lower part of the fireproof covering layer 4 Since you to connect by screwing Ceiling bolt 1 to the Flip portion 2d, it is possible to perform linking operations of the spacer support fitting 3 of the ceiling hanger bolts 1 easy quickly.

Moreover, according to the present invention, the spacer support fitting 3 having the axial main portion 2b of the axial length adjusted to the layer thickness of the fireproof coating layer 4 can be used. That is, the layer thickness of the fireproof coating layer 4 is determined in accordance with the fireproof time, and the thickness of the fireproof coating layer 4 becomes thick substantially in proportion to the increase of the fireproof time. The main body portion 2 b can sufficiently correspond to the layer thickness of the fireproof covering layer 4.

It is use condition explanatory drawing shown with the partial cross section of 1st Embodiment of the fireproof ceiling foundation material attachment apparatus which concerns on this invention. It is a front sectional view of the use condition. It is the same disassembled perspective view. It is the principal part expansion 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 the other modification. It is use condition explanatory drawing shown with 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 by the same 2nd Embodiment. It is the 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 foundation material attachment apparatus which concerns on this invention, and the principal part of 4th Embodiment. It is a prior art showing, and is a use condition explanatory view before forming a fireproof coating layer of a fireproof ceiling foundation material attachment device. It is explanatory drawing which shows the formation procedure of the fireproof coating layer.

  BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a usage state of a first embodiment of a fireproof ceiling base mounting device according to the present invention.

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

  Although the above H-shaped steel F is used to suspend a suspension bolt which is a ceiling base material thereto, in the present invention, the spacer metal 2 is interposed between the H-shaped steel F and the ceiling suspension bolt 1. It intervenes. Then, in order to attach the spacer 2 to the H-shaped steel F, the spacer support 3 is fixed to the H-shaped steel F, and the spacer 2 is attached to the H-shaped steel F via the spacer support 3.

  Thereafter, the fireproof covering layer 4 is formed on the H-shaped steel F in a state where the lower portion 2a of the spacer metal 2 is exposed, and the ceiling suspension bolt 1 is suspended on the exposed portion 2a of the spacer metal 2.

  Conventionally, as described above, the fireproof covering 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 The spacer metal 2 and the spacer support 3 for fixing the spacer 2 to the H type steel F are interposed between the H type steel F, and before the fireproof covering layer 4 is formed, the spacer metal 2 and the spacer support metal First, H-type steel F is pre-applied to 3 and then the fireproof coating layer 4 is post-applied.

  FIG. 3 illustrates the structures of the spacer metal 2 and the spacer support 3 in an easy-to-understand manner. First, the structure of the spacer support 3 will be described. The spacer support 3 faces the upper wall 3a. Lower wall portion 3b and the vertical wall portion 3c connecting the both wall portions to form a horizontal U-shape, and the opposing space portion between the upper wall portion 3a and the lower wall portion 3b is the lower flange 2F of the H-shaped steel F (see FIG. 1, see FIG. 2) as the lower flange insertion part 3d for insertion, the bolt screw hole 6 for screwing in the pressing bolt 5 is formed in the upper wall 3a, and the spacer metal 2 is screwed in the lower wall 3b. Screwing holes 7 for the are formed.

  The spacer support fitting 3 is formed by bending a metal plate, and in order to reinforce the strength of the spacer support fitting 3 made of a metal plate, the spacer support fitting 3 is opposed to the upper wall 3a of the spacer support fitting 3 and the lower portion. The cross-sections of the upper wall 3a, the vertical wall 3c and the lower wall 3b are respectively provided in the width direction so that any cross section of the wall 3b and the vertical wall 3c connecting both walls is U-shaped in 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 3a of the spacer support bracket 3. The spacer support fitting 3 is attached to the above-mentioned H-shaped steel F by pressing on the upper surface.

  The spacer hardware 2 has a shaft-like main body 2b of a predetermined length formed in accordance with the layer thickness of the fireproof covering layer 4 described in detail later, an external thread 2c formed on the top, and an internal thread formed on the bottom The upper male screw portion 2c of the spacer fitting 2 is screwed into the screwing hole 7 of the spacer support fitting 3 consisting of the part 2d and attached to the H-shaped steel F, and the spacer fitting 2 via the spacer support fitting 3 It is 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 to have a smaller amount of protrusion from the vertical wall portion 3c side than the lower wall portion 3b. The bolt screw hole 6 formed in the upper wall portion 3a is formed closer to the vertical wall portion 3c than the screwing hole 7 formed in the lower wall portion 3b, and the pressure 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 floating by the reaction force, and the screw of the lower wall portion 3b The spacer metal 2 screwed into the locking hole 7 is considered to be located at the widthwise center of the lower flange 2F of the H-shaped steel F.

  After attaching the spacer support 3 and the spacer 2 to the H-shaped steel F as described above, the entire surface of the H-shaped steel F, the spacer support 3 and the spacer 2 are provided as shown in FIG. In forming the refractory covering layer 4, the lower covering 2 a of the spacer metal object 2 is formed so as to be exposed.

  In the first embodiment of the present invention, as shown in FIG. 1, FIG. 2 or FIG. 4, the fireproof coated layer 4 is attached to the H-type steel F, the spacer support fitting 3 and the spacer fitting 2. The rock wool made of wood 4A and in a disintegrated state is mixed with cement milk etc. and sprayed with high pressure air by a known spray device such as an air gun for spray, The material 4A is attached to the H-type steel F, and the rock wool material 4A is laminated on the H-type steel F to a predetermined thickness.

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

  Then, the axial length L2 (FIG. 4, FIG. 3) of the axial main portion 2b of the spacer 3 should be determined substantially in proportion to the layer thickness L1 of the fireproof covering layer 4; When the layer thickness L1 is 20 mm, the axial length L2 of the axial main body portion 2b is 50 mm, and when the layer thickness L1 of heat resistance for 2 hours is 45 mm, the axial length L2 of the axial main body portion 2b is 70 mm, When the layer thickness L1 of heat resistance for 3 hours is 65 mm, the axial length L2 of the shaft-like main body 2b is 90 mm, whereby the lower portion 2a of the spacer metal 2 is in spite of 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 metal member 2 is exposed at the lower part of the fireproof covering layer 4, the ceiling suspension bolt 1 is screwed and suspended on the female screw portion 2d of the exposed portion 2a. Thereafter, as shown in FIG. In the same manner as in the prior art, a hanger 22 is fixed to the lower end of the ceiling suspension bolt 1 with a nut 23, and the flange 22 is engaged with the hanger 22 and a clip 25 is attached to the flange 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 the procedure for forming the fireproof covering layer 4 according to the first embodiment of the present invention. First, as shown in (a), the spacer support fitting 3 is pressed against the lower flange 2F of H-shaped steel F. At the same time, the spacer fitting 2 is screwed to the spacer fitting 2 and attached. In addition, although the attachment hole 10 is formed in the vertical wall part 3c of the spacer support bracket 3, this role is mentioned later.

  Next, as shown in (b), the sprayed rock wool material 4A for forming the fireproof covering layer 4 is made to cover the H-type steel F, the spacer support bracket 3 and the spacer bracket 2, and the lower portion 2a of the spacer bracket 2. In the exposed state, the rock wool material 4A is sprayed to adhere to the layer thickness adjusted to the required heat resistance time. Thus, the ceiling covering bolt 1 is screwed into the female screw portion 2d of the lower portion 2a of the spacer hardware 2 exposed from the refractory covering layer 4A to form the refractory covering layer 4 in which the H type steel F is completely shielded from the outside air. Be done.

  FIG. 6 shows a modification of the first embodiment of the present invention, and the mounting hole 10 shown in FIG. 5 (a) uses the ceiling back while attaching the ceiling suspension bolt 1 to the H-shaped steel F. Mounting fixtures such as wiring fittings and water pipes installed on the back of the ceiling, and mounting fixtures 13 such as L fittings in the mounting holes 10 by the fastening bolts 12 A short mounting bolt 14 is attached, and in this state, the above-described spraying step of the blowing rock wool material 4A is performed. Since the mounting bolts 14 extending downward from the mounting holes 10 are short in length, they do not interfere with the spraying operation of the blowing rock wool material 4A. After the blowing step of the rocking material 4A, the under-the-ceiling installation 9 is attached to the lower portion 14a of the mounting bolt 14 exposed below the rocking material 4A through a suitable mounting bracket 15.

  FIGS. 7 to 10 show a second embodiment of the present invention, and the difference in configuration from the first embodiment is that, in the first embodiment, the fireproof covering layer 4 is formed of the sprayed rock wool material 4A. However, in the second embodiment, the fireproof covering layer 4 is different only in that it is formed of the felt-like rock wool material 4B, and the other structure is completely the same as 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 difference between the two is the configuration of the fireproof covering layer 4 I will explain only about.

  The fireproof covering layer 4 of the second embodiment shown in FIG. 7 or FIG. 9 is made of felt-like rock wool material 4B, and is formed into a sheet shape by rocking rock wool material (rock wool). As shown in FIG. 8 (a), there is a product of the felt-like rock wool material 4B made into a roll sheet, or a product made into a rectangular sheet as shown in FIG. 8 (b). . As shown in FIG. 7 or 8, the felt-like rock wool material 4B is wound so as to cover the H-type steel F, the spacer support fitting 3 and the spacer fitting 2 without gaps, and the ceiling concrete slab is fixed by the fixing pin 16 or 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 layer thickness of the fireproof covering layer 4 made of the felt-like rock wool material 4B and the axial length of the axial main portion 2b of the spacer fitting 2 is the same as that of the first embodiment described above with reference to FIG. .

  FIG. 10 shows the procedure for forming the fireproof covering layer 4 of the second embodiment, which corresponds to FIG. 5 of the first embodiment, but to make sure of it, first, as shown in (a) The spacer support 3 is fixed to the lower flange 2F of the H-shaped steel F by screwing in the pressing bolt 5, and at the same time, the spacer 2 is screwed to the spacer 2 and attached.

  Next, as shown in (b), the sprayed rock wool material 4A for forming the fireproof covering layer 4 is made to cover the H-type steel F, the spacer support bracket 3 and the spacer bracket 2, and the lower portion 2a of the spacer bracket 2. A felt-like rock is formed by winding the felt-like rock wool material 4B in a layer thickness adjusted to the required heat resistance time and fixing the portion in contact with the ceiling concrete slab S with the fixing pin 16 or an adhesive. Make the cotton material 4B adhere. Thus, the ceiling covering bolt 1 is screwed into the female screw portion 2d of the lower portion 2a of the spacer hardware 2 exposed from the refractory covering layer 4A to form the refractory covering layer 4 in which the H type steel F is completely shielded from the outside air. Be done. The felt-like rock wool material 4B has a relatively flat surface, unlike the sprayed rock wool material 4A, so the appearance is good, and the colored rock wool material on the surface of the felt-like rock wool material 4B By overlaying the layers, the appearance will be better.

  FIG. 11 shows a third embodiment of the present invention, in which a spacer fitting 2 is interposed between a ceiling concrete slab S and a ceiling suspension bolt 1, and the spacer fitting 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 . The spacer hardware 2 attached to the ceiling concrete slab S is embedded in the fireproof covering layer 4 except for the lower portion 2a of the spacer hardware 2 to which the ceiling suspension bolt 1 is connected. Thus, even if a fire occurs outside the room, the heat of the fire is not transmitted to the ceiling concrete slab S, and a good fire resistance can be exhibited. The ceiling concrete slab S is formed by overlaying concrete mortar Sb on the waved deck plate Sa.

Further, according to the third embodiment, the spacer concrete 2 is attached to the ceiling concrete slab S at every 600 to 900 mm pitch, and the fireproof covering layer 4 is formed on the surface of the ceiling concrete slab S in this state. Since the process is simply performed, the fireproof covering layer 4 can be formed efficiently. And since the lower part 2a of the spacer metal object 2 is exposed from the fireproof coating layer 4, the ceiling suspension bolt 1 can be connected with the spacer metal object 2 quickly and easily. Specifically, as in the first or second embodiment, the spacer metal member 2 is formed on the shaft-shaped main body portion 2b of a predetermined length formed according to the layer thickness of the fireproof covering layer 4 and the upper portion thereof. The upper external thread 2c of the spacer fitting 2 is screwed into the insert fitting 11 composed of an external thread 2c and an internal thread 2d formed in the lower part and embedded in the ceiling concrete slab S, exposing the lower part 2a of the spacer fitting 2 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 on the H-shaped steel F so as to form the fireproof covering layer 4 on the ceiling concrete slab S. Do. As a result, the work of forming the fireproof coating layer 4 can be carried out easily and quickly, and the ceiling suspension bolt 1 is screwed into and connected to the lower internal thread portion 2d of the spacer hardware 2 exposed from the lower part of the fireproof coating layer 4. As a result, the connection work of the insert fitting 11 of the ceiling suspension bolt 1 can be performed easily and quickly.

And the spacer metal object 2 which has the axial main-body part 2b of the axial length according to the layer thickness of the fireproof coating layer 4 can be used. That is, the layer thickness of the refractory coating layer 4 is determined in accordance with the refractory time, but substantially in proportion thereto when the refractory time increases the layer thickness of the refractory coating layer 4 is increased, the spacer hardware biaxial The main body portion 2 b can sufficiently correspond to the layer thickness of the fireproof covering layer 4.

  In FIG. 11, a partial view taken out at a portion indicated by an arrow a shows the main part of the fourth embodiment of the present invention, and the structure different from the third embodiment is that the fireproof covering layer 4 is the third embodiment. The point is made of the blown rock wool material 4A, while the fourth embodiment is the point made of the felt-like rock wool material 4B. 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 the adhesive or the fixing pin 16. In the felt-like rock wool material 4B, unlike the sprayed rock wool material 4A, the surface is formed relatively flat because the appearance is good, and colored rock wool on the surface of the felt-like rock wool material 4B By laminating the materials, the appearance appearance can be further improved.

S ceiling concrete slab F H-type steel 2F H-type steel lower flange 1 ceiling suspension bolt 2 spacer hardware 2a lower part of spacer metal object 2b axial main body 2c of spacer metal object external thread part 2d of spacer metal object internal thread part 3 of spacer metal object 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 covering layer 4A spray rock wool material 4B felt-like rock wool material 5 pressing bolt 6 Bolt screw hole 7 Screw hole 8 Reinforcement rib of spacer hardware 9 Ceiling back installation thing 10 Mounting hole 11 Insert bracket

Claims (4)

A fire-resistant ceiling base material mounting device in which a fireproof covering layer is formed on an H-type steel which is a ceiling beam of a building and a suspension bolt which is a ceiling base material is suspended on the H-type steel. Interpose the spacer support bracket and the spacer hardware between the
The spacer support fitting is formed in a U-shape in the horizontal direction by the upper wall, the lower wall opposite to this, and the vertical wall connecting the both walls, and the space between the upper wall and the lower wall is the above The lower flange of H-shaped steel is used as a lower flange insert for insertion, a bolt screw hole for screwing in a pressure bolt is formed in the upper wall, and a screw hole for screwing a spacer metal is formed in the lower wall Screwing a pressure bolt into the bolt screw hole in the upper wall, pressing against the upper surface of the lower flange inserted in the lower flange insertion part, and attaching the spacer support bracket to the H-shaped steel,
The spacer metal comprises a shaft-shaped main body having a predetermined length formed in accordance with the layer thickness of the fireproof covering layer, an external thread formed at the upper portion thereof, and an internal thread formed at the lower portion thereof Screw the upper external threads of the spacer hardware into the screw holes of the spacer support bracket attached to the template steel, and spray the sprayed rock wool material onto the H-shaped steel with the lower part of the spacer hardware exposed, or felted rock wool Forming a refractory covering layer on the H-type steel so as to wind the material around the H-type steel, and screwing and connecting a ceiling suspension bolt to a lower internal thread portion of the spacer metal exposed from the refractory covering layer;
The fireproof ceiling base material attachment device which hung a ceiling suspension bolt on the exposed part of said spacer hardware. The upper wall portion, the vertical wall portion and the lower wall portion so that the cross section of the upper wall portion of the spacer support fitting, the lower wall portion opposite thereto and the vertical wall portion connecting the both wall portions is U-shaped in cross section refractory ceiling base member mounting device according to claim 1, the reinforcing rib is formed in both widthwise edges of the. 3. The fireproof ceiling base material mounting device according to claim 1, wherein mounting holes, such as screw holes, for mounting a ceiling back installation such as an electric wire or a water pipe are provided on a vertical wall portion of the spacer support fitting. In a fireproof ceiling base material mounting device in which a fireproof covering layer is formed on a ceiling concrete slab of a building and a suspension bolt as a ceiling foundation material is suspended on the ceiling concrete slab, the ceiling concrete slab and the ceiling suspension bolt Interposing spacer hardware between them,
The spacer hardware comprises a shaft-shaped main body portion of a predetermined length formed in accordance with the layer thickness of the fireproof covering layer, an external thread portion formed on the upper portion thereof, and an internal thread portion formed on the lower portion thereof The upper external thread of the spacer hardware is screwed into the insert fitting embedded in the concrete slab, and the sprayed rock wool material is sprayed onto the above-mentioned ceiling concrete slab or the felt-like rock wool material with the lower internal thread of the spacer hardware exposed. A fireproof covering layer is formed on the ceiling concrete slab in such a manner as to be wound around the ceiling concrete slab, and a ceiling suspension bolt is screwed and connected to a lower internal thread portion of a spacer metal exposed from the lower part of the fireproof covering layer;
The ceiling base material attaching device which hung the ceiling suspension bolt on the exposed part of said spacer hardware.

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