JP6817052B2 - Fireproof coating construction method - Google Patents

Description

The present invention relates to a fireproof coating construction method used for fireproof coating of columns, outer walls, etc., which are main structural parts in a fireproof building such as a mechanical parking device.

As one type of building used for mechanical parking devices, a structure that forms a framework is formed by a plurality of pillars and girders hung on each pillar, and an outer wall surrounds the structure. There is a steel-framed building with the structure provided.

In this type of steel-framed building, a corrugated panel made of thin steel plate may be used as the outer wall material for constructing the outer wall.

When such a panel is used as an outer wall material, a furring strip extending in the lateral direction is attached to the outside of an adjacent pillar so as to span a plurality of stages at intervals set in the vertical direction. Further, the panels having a predetermined vertical dimension and width dimension are arranged side by side along the side surface of the furring strip, and each panel is fixed to the furring strip via an attachment means. (See, for example, Patent Document 1).

By the way, fireproof buildings under the Building Standards Act include not only schools, gymnasiums, hospitals, etc., but also automobile garages such as mechanical parking devices. For this reason, mechanical parking devices have a fireproof structure by providing fireproof coatings on columns and outer walls as the main structural parts specified in the Building Standards Act in order to meet the standards of fireproof buildings under the Building Standards Act. Need to be.

As a method of fire-resistant coating of columns and outer walls in a steel-framed building such as the mechanical parking device, a spray-type fire-resistant coating method is generally adopted.

When implementing a spray-type fireproof coating construction method for a mechanical parking device, a spray containing rock wool pumped by a pump and a hardening material such as cement with the outer wall of the mechanical parking device completed. The fireproof coating material for attachment is sprayed from the nozzle to the periphery of the pillar and the inner surface of the outer wall so that the fireproof coating material is adhered at the thickness and density required for the desired fire resistance performance.

By the way, in the corner portion of the mechanical parking device, panels serving as outer wall materials are attached to the side portions of the pillars in two directions via furring strips. Therefore, in the corner portion, a space portion having an L-shaped plane shape is formed between the outer wall and the pillars arranged inside the outer wall portion.

However, since the width of this space along the inside and outside of the building is only the size corresponding to the thickness of the furring strip, it is placed on the inside of the outer wall and the side of the pillar, which is arranged to face this space. It is difficult to arrange the nozzles for spraying the fireproof coating material so as to face each other.

Therefore, when applying a fireproof coating to the inner surface of the outer wall facing the space of the corner and the side surface of the pillar, the fireproof coating is blown into the space of the corner and the entire space is filled with the fireproof coating. The method is adopted.

Japanese Patent No. 2878006

However, the space portion of the corner portion of the mechanical parking device is provided with openings on both end sides of an L-shaped planar shape. Therefore, when the refractory coating material is blown from one opening into the space of the corner portion, a part of the blown refractory covering material may blow through to the other opening side and be lost. Therefore, in consideration of the amount of the blow-through, it is necessary to blow an excess amount of the refractory coating material into the space portion of the corner portion at a set ratio with respect to the volume of the space portion.

Further, the refractory coating material immediately after being sprayed has fluidity until the cured material is cured. Therefore, even if the refractory coating material is blown into the entire space of the corner portion and the refractory coating material is filled up to the openings on both ends, the refractory coating material tends to flow downward due to its own weight. Therefore, in the space portion of the corner portion, the fireproof coating material located on the lower side of the space portion is pushed out from the opening by receiving the weight of the fireproof coating material filled in the entire space portion, and as a result, the space On the upper side of the portion, a phenomenon may occur in which the refractory coating material is insufficiently filled.

If the refractory coating material is insufficiently filled on the upper side of such a space, it is necessary to re-blow and fill the refractory coating material. Therefore, even with this, in order to fill the space portion of the corner portion with the fireproof coating material, a process of blowing an excessive amount of the fireproof coating material at a ratio set with respect to the volume of the space portion of the corner portion. Is required.

Therefore, according to the present invention, it is possible to apply a fireproof coating by filling the corner portion of the building with a fireproof coating material, and the amount of the fireproof coating material used for the construction of the fireproof coating material is determined by the space portion of the corner portion. It is intended to provide a fireproof coating construction method capable of making the amount closer to the volume of.

In order to solve the problem, the present invention has a pillar having a rectangular outer shape extending in the vertical direction, and two pillars arranged on the outside of two side portions sandwiching one corner of the pillar with a gap. A plane formed between an outer wall having a side wall, a furring strip attached to the outside of the pillar, extending laterally and arranged in a plurality of steps in the vertical direction, and the furring strip adjacent to the pillar and the outer wall vertically. A fireproof coating construction method in which a fireproof coating is applied to a corner portion of a building having a space portion having a bent shape, wherein the space portion is a region along one side of the bent shape and a corner region. The first compartment has a first compartment according to the space and a second compartment according to a region along the other side, and the first compartment has a first opening communicating with the outside of the space. The second compartment has a second opening that communicates with the outside of the space, the closure has a rectangular end face, and the long side dimensions of the end face are arranged vertically. The distance between the two is set, the dimension of the end face in the short side direction is set to the distance between the pillar and the outer wall, and the stopper is inserted into the second section through the second opening. a closure installing step of installing in a posture separating the said second compartment and said first section by said end surface, from said first opening communicating with the first compartment, the first compartment by blowing inside a refractory coating material, wherein the first filling step of filling the refractory coating material in the first compartment, from the second opening communicating with the second compartment, said second compartment by blowing it said inside fireproof coating materials, and fireproofing construction method of performing a second filling step of filling the refractory coating material in said second compartment.

The first filling step, a process of spraying the refractory coating material to the inside of the first compartment from the first opening, the refractory coating material is sprayed on the inside of the first compartment, pressing and a step of performing a process of pressing the depth direction of the first compartment from the first opening by ingredients, alternately, the second filling step, the second compartment from the second openings and processing the inwardly spraying the refractory coating material, the second the refractory coating material is sprayed on the inside of the compartment of, for pressing from the second opening by the pressing member to the rear direction of the second compartment The process is a process in which processing and processing are performed alternately.

After the first filling step, a closing tool removing step of removing the closing tool from the space portion is performed, and then the second filling step is performed.

The column is made of either H-section steel, I-section steel, or channel steel, and is a recess formed inside a pair of flanges and a web in the section steel. A method of attaching a lath that closes the recess to the recess that faces the section or the second section.

According to the present invention, a fireproof coating can be applied to a space portion of a corner portion of a building by filling with a fireproof coating material, and the amount of the fireproof coating material used for the construction of the fireproof coating material is the space portion of the corner portion. The amount can be closer to the volume of.

It shows one embodiment of the fireproof coating construction method, and is the schematic plan view which shows the building to be constructed. It is a figure which shows the corner part in FIG. 1 enlarged. It is a figure which shows the corner part of FIG. 2 from another direction. It is a schematic diagram which shows the appliance used in the fireproof coating construction method. It is the schematic which shows the procedure of the fireproof coating construction method. It is the schematic which shows the procedure following FIG. 5 of the fireproof coating construction method.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 6 (a), (b), (c), and (d) are cases where, as an embodiment of the fireproof coating construction method, the fireproof coating is applied to the corner portion of the building of the mechanical parking device as a building. It shows an example.

FIG. 1 shows a building of a mechanical parking device, and is a schematic plan view in which the description of the roof portion is omitted. FIG. 2A is an enlarged plan view of the corner portion of the building of FIG. 1, and FIG. 2B is a model diagram in which the structure of the corner portion of FIG. 2A is simplified. FIG. 3 is a view taken along the line AA of FIG. 2A.

FIG. 4 shows an instrument used for carrying out the fireproof coating construction method, FIG. 4A is a schematic perspective view of a closing tool, and FIG. 4B is a schematic perspective view of a trowel.

FIG. 5 shows the procedure of the fireproof coating construction method, and FIG. 5A is a diagram showing a state in which the fireproof coating material is first blown into the first section of the space portion of the corner portion. FIG. 5B is a diagram showing the first pressing process in the first section, and FIG. 5C is a diagram showing a state in which the first section is filled with the refractory coating material.

FIG. 6 shows a procedure following FIG. 5 of the fireproof coating construction method, and FIG. 6A shows a state in which the fireproof coating material is first blown into the second section of the space portion of the corner portion. 6 (b) is a diagram showing the first pressing process in the second compartment, and FIG. 6 (c) is a diagram showing a state in which the second compartment is filled with the refractory coating material. FIG. 6 (d) is a diagram showing a state in which a fireproof coating is applied to the inner surfaces of the pillar and the outer wall at the corner portion.

First, with reference to FIGS. 1, 2 (a), (b), and 3, the building of the mechanical parking device to be applied with the fireproof coating will be outlined.

As shown in FIG. 1, the building of the mechanical parking device includes a frame structure 3 composed of pillars 1 erected at four corners of the building and beams 2 connecting the pillars 1. .. On the adjacent pillars 1, a plurality of furring strips 4 extending in the lateral direction are arranged in a plurality of stages in the vertical direction at set intervals on a side portion that faces the outside of the building, and each furring strip 4 is arranged on each pillar 1. It is attached so that it can be bridged. The furring strip 4 is attached to the pillar 1 via, for example, a mounting member 5 such as a bracket, as shown in FIGS. 2A and 3.

Further, as the outer wall material, corrugated sheet-shaped panels 6 made of thin steel plates having predetermined vertical and width dimensions are arranged side by side along the side surface of the furring strip 4, and each panel 6 is arranged along the furring strip. It is fixed to 4 via a mounting means (not shown). As a result, the outer wall 7 of the building is constructed as an aggregate of panels 6 arranged so as to surround the skeleton structure 3.

Therefore, as shown in FIGS. 2A and 3), the corners of the building are vertically adjacent to each other between the pillars 1 arranged at the corners and the outer walls 7 arranged outside the pillars 1. A space portion 8 is formed at a location between the furring strips 4.

FIG. 2B is a model diagram in which the configurations of the pillar 1 and the outer wall 7 are simplified for the same corner portion as in FIG. 2A in order to show the space portion 8 more clearly. In FIG. 2B, the description of the furring strip 4 and the mounting member 5 is omitted.

As shown by the alternate long and short dash line in FIG. 2B, the space portion 8 has an L-shaped bend along the side portions 9a and 9b of the pillar 1 in two directions.

In this embodiment, since it is necessary to explain the procedure of the fireproof coating construction method described later, each configuration of the corner portion shall be referred to as follows.

As shown in FIG. 2B, in the outer wall 7 of the corner portion, the wall surface arranged on the outside of the first side portion 9a of the pillar 1 in a posture along the first side portion 9a is the first. It is called the side wall 10a of. The wall surface arranged on the outside of the second side portion 9b of the pillar 1 in a posture along the second side portion 9b is referred to as a second side wall 10b.

As shown by the alternate long and short dash line in FIG. 2B, the space portion 8 is a region in which a region along one side and a corner region in an L-shaped bent planar shape are combined, that is, FIG. In (b), a first side portion 9a of the pillar 1, a virtual surface extending the first side portion 9a until it reaches the second side wall 10b, an inner surface of the first side wall 10a, and a second. The area surrounded by the inner surface of the side wall 10b of the first section 8a is referred to as a first section 8a. Further, as shown by a broken line in FIG. 2 (b), in the space portion 8, a region along the other side in the planar shape bent in an L shape, that is, in FIG. 2 (b), the second column 1. The area surrounded by the side portion 9b, the inner surface of the second side wall 10b, and the virtual surface extending the first side portion 9a of the pillar 1 until reaching the second side wall 10b is the second section 8b. That is.

Therefore, the space portion 8 is divided into a first compartment 8a and a second compartment 8b at a position of a virtual surface extending the first side portion 9a of the pillar 1 until it reaches the second side wall 10b. ..

Further, it is formed inside the end side of the first side portion 9a of the pillar 1 on the side far from the apex of the corner portion, the first side wall 10a, and the upper and lower furring strips 4 (see FIG. 3). The opening communicating with the section 8a of 1 is referred to as a first opening 11a. Therefore, the first compartment 8a is a substantially rectangular parallelepiped extending linearly from the first opening 11a through between the first side portion 9a and the first side wall 10a to a position where it abuts on the second side wall 10b. It becomes a space of shape.

Further, the second side portion 9b of the pillar 1 is formed inside the end side far from the apex of the corner portion, the second side wall portion 10b, and the upper and lower furring strips 4 (see FIG. 3). The opening communicating with the second section 8b is referred to as a second opening 11b. Therefore, the second compartment 8b is a substantially rectangular parallelepiped extending linearly from the second opening 11b through between the second side portion 9b and the second side wall 10b to the position where it abuts the first compartment 8a. It becomes a space of shape.

In the present embodiment, the pillar 1 of the building is made of H-shaped steel as shown in FIG. 2 (a). Therefore, in the column 1, one of the two recesses 14a and 14b formed inside the pair of flanges 12 and the web 13 in the H-section steel has the recess 14a in the first section 8a or the second section 8b. It is said that it faces the. FIG. 2A shows a configuration in which the recess 14a faces the second compartment 8b.

By the way, in the fireproof coating construction method of the present embodiment, as will be described later, the fireproof coating material 15 blown into the respective compartments 8a and 8b in both the first compartment 8a and the second compartment 8b (FIG. 5 (a). ) Is individually pressed. Therefore, when the refractory coating material 15 blown into the second section 8b can enter the recess 14a of the H-shaped steel, it becomes difficult to press the refractory covering material 15 in the second section 8b. Become.

Therefore, the pillar 1 has a configuration in which the recess 14a, which is arranged to face the second section 8b, is closed by a lath 16. In a configuration in which the recess 14a is closed with a lath 16, for example, a plurality of force bones 17 arranged at intervals set in the longitudinal direction of the column 1 are attached between the flanges 12 on both sides of the recess 14a, and the force bones 17 are attached. , It may be realized by attaching a lath 16 arranged at a position along the outer shape of the second side portion 9b.

Although the lath 16 is shown as having a flat shape in FIG. 2A, it is not limited to the flat lath, and a lath other than the flat lath such as a hump lath or a corrugated lath may be used. Of course. Further, as long as the lath 16 can be attached so as to close the recess 14a of the pillar 1, it goes without saying that any configuration other than that shown in the drawing may be adopted as the attachment method and attachment structure of the lath 16.

The lath 16 may be attached to the recess 14a of the pillar 1 at a factory or the like before the pillar 1 is carried into the construction site of the building of the mechanical parking device, or at the construction site. Further, when the lath 16 is attached at the construction site, it may be attached before or after the pillar 1 is erected as long as the attachment work to the recess 14a can be performed.

Although the case where the column 1 is made of H-shaped steel has been described, even when the column 1 is made of I-shaped steel or channel steel, the recesses of the shaped steel are the first section 8a and the second section 8b. In the case of the arrangement facing the above, the recess may be closed with a lath 16.

Next, the equipment used when carrying out the fireproof coating construction method of the present embodiment will be described. In the fireproof coating construction method of the present embodiment, a closing tool 18 as shown in FIG. 4A and a trowel 19 as a holding tool as shown in FIG. 4B are used.

As shown by the alternate long and short dash line in FIG. 2 (a), the fastener 18 is arranged at a position (see FIG. 2 (b)) at the boundary between the first compartment 8a and the second compartment 8b. It is an instrument provided with an end face 18a to be exposed on the side of the compartment 8a. As shown in FIG. 4A, for example, the closing tool 18 has a rectangular plate-shaped member 20 having one surface serving as an end surface 18a of the closing tool 18, and a holding member 20 provided on the other surface of the plate-shaped member 20. It is configured to include a hand 21.

The plate-shaped member 20 is inserted into the second compartment 8b through the second opening 11b, and as shown by the alternate long and short dash line in FIG. 2A, the boundary between the first compartment 8a and the second compartment 8b. The purpose is to install the first section 8a and the second section 8b in a posture of partitioning the first section 8a and the second section 8b at a location (see FIG. 2B). Therefore, the plate-shaped member 20 has dimensions in the long side direction above and below the installation location within a range in which the plate-shaped member 20 can pass through the second section 8b from the second opening 11b to the predetermined installation location. The dimensions are set as close as possible to the distance between the arranged furring strips 4, and the dimensions in the short side direction are set to the dimensions as close as possible to the distance between the pillars 1 arranged on both sides of the installation location and the outer wall 7. ing.

Although it depends on the shape of the handle 21, the plate-shaped member 20 may of course be tilted from the posture when it is arranged at the installation location when passing through the second section 8b. Therefore, the dimension in the long side direction of the plate-shaped member 20 may correspond to the dimension of the portion where the vertical dimension of the second section 8b is minimized, but is not limited thereto. Similarly, the dimension of the plate-shaped member 20 in the short side direction may correspond to the dimension of the portion where the dimension of the second section 8b in the indoor / outdoor direction is the minimum, but is not limited thereto.

In the present embodiment, the handle 21 is a rod-shaped member extending in one direction, and one end side in the longitudinal direction is attached to the plate-shaped member 20. The length of the handle 21 is set to be longer than the distance from the second opening 11b to the predetermined installation location of the plate-shaped member 20.

In the closing tool 18 having the above configuration, a worker (not shown) inserts the plate-shaped member 20 from the second opening 11b into the second section 8b while holding the handle 21, and the predetermined one. It is possible to perform the operation of arranging it at the installation location. The closing tool 18 arranged at the predetermined installation location can partition the portion of the first compartment 8a that serves as a boundary with the second compartment 8b (see FIG. 2B) by the end surface 18a.

If the operator can insert the plate-shaped member 20 from the second opening 11b into the second section 8b while holding the handle 21, and arrange the plate-shaped member 20 at the predetermined installation location. Of course, the handle 21 may have any shape other than those shown in the figure.

As shown in FIG. 4B, the iron 19 is configured to include a rectangular plate-shaped member 22 and a handle 23 provided on one side of the plate-shaped member 22.

The plate-shaped member 22 is set so that the dimension in the long side direction is smaller than the dimension of the portion where the vertical dimension of each of the compartments 8a and 8b is the minimum, and the dimension in the short side direction is set inside and outside the building of each of the compartments 8a and 8b. The dimension in the direction is set smaller than the dimension of the minimum part.

In the present embodiment, the handle 23 is a U-shaped rod-shaped member having both ends attached to the plate-shaped member 22.

The trowel 19 having the above configuration can be inserted from the openings 11a and 11b into the corresponding compartments 8a and 8b by an operator (not shown) while holding the handle 23. Further, in the trowel 19, the plate-shaped member 22 can be arranged in a posture along the vertical plane extending in and out of the building in each of the compartments 8a and 8b, and the plate-shaped member 22 is opened in this posture. It is possible to perform an operation of moving the 11a and 11b in a direction away from each other.

If the operator can perform the operation of moving the plate-shaped member 22 in the predetermined direction in each of the compartments 8a and 8b while holding the handle 23, the handle 23 is arbitrary other than those shown in the drawing. Of course, it may be in the shape of.

When implementing the fireproof coating construction method of the present embodiment, the number of times the fireproof coating material 15 is blown into the first compartment 8a in a plurality of times and the number of times the fireproof coating material 15 is blown into the second compartment 8b. The number of times to perform is divided into a plurality of times is set. The number of times the fireproof coating material 15 is blown into the respective compartments 8a and 8b may be set at any time before the fireproof coating material 15 is blown into the respective compartments 8a and 8b. The number of times the fireproof coating material 15 is blown into the respective compartments 8a and 8b may be appropriately adjusted according to the situation at the site during the construction of the fireproof coating material 15 in the respective compartments 8a and 8b.

In the fireproof coating construction method of the present embodiment, first, a closing tool installation step is performed.

In the closing tool installation step, the closing tool 18 is used to insert the plate-shaped member 20 from the second opening 11b into the second compartment 8b as shown by the alternate long and short dash line in FIG. 2A. It is installed at a place that is a boundary between the first section 8a and the second section 8b. In this state, the closing tool 18 detachably fixes the handle 21 to the pillar 1 or other fixing portion via a fixing means (not shown) such as a clamp. As a result, the closing tool 18 is temporarily installed. Further, the space portion 8 is divided into a first section 8a and a second section 8b by the end face 18a.

When the installation of the plate-shaped member 20 of the closing tool 18 is completed, the first filling step of filling the first section 8a with the fireproof coating material 15 is started.

In the first filling step, first, as shown in FIG. 5A, the first spraying process of the refractory coating material 15 for spraying is performed from the first opening 11a to the first section 8a. The refractory coating material 15 may be blown by injecting the refractory coating material 15 pumped by a pump (not shown) from a nozzle (not shown), as in the conventional case.

Further, the amount of the fireproof coating material 15 blown into the first compartment 8a in the first blowing treatment is the volume of the first compartment 8a determined in advance from the design information and the like, and the fireproof coating set for the first compartment 8a. The amount may be set to correspond to the value obtained by dividing by the number of times the material 15 is blown.

When a predetermined amount of the refractory coating material 15 is blown into the first compartment 8a in this way, most of the refractory coating material 15 is opened in the first opening in the first compartment 8a due to the momentum injected from the nozzle. It adheres to the end side that separates from the portion 11a.

At this time, the plate-shaped member 20 forming the end face 18a of the closing tool 18 is arranged at the boundary between the first section 8a and the second section 8b, and the first section 8a and the second section 8a and the second section 8a are arranged. The boundary with the section 8b is almost closed by the plate-shaped member 20. Even if there is a gap communicating from the first compartment 8a to the second compartment 8b, the gap is limited to the outer peripheral side of the plate-shaped member 20.

Therefore, the phenomenon that the refractory coating material 15 blown into the first section 8a blows through to the second section 8b is significantly suppressed as compared with the case where the plate-shaped member 20 is not arranged at the boundary as in the conventional case. Will be done.

Therefore, in the first blowing treatment, almost the entire amount of the refractory coating material 15 blown into the first compartment 8a can be attached to the inside of the first compartment 8a.

When the first blowing treatment is completed, in the first section 8a, as shown in FIG. 5B, the refractory covering material 15 adhering to the inside of the first section 8a is first removed by using the trowel 19. The first pressing process of pressing in the direction away from the opening 11a is performed. This pressing process may be performed before the refractory coating material 15 blown into the first section 8a is cured.

As a result, the refractory coating material 15 is filled on the end side of the first compartment 8a that is separated from the first opening 11a.

At this time, the refractory coating material 15 pressed by the trowel 19 is molded and compacted, so that free flow downward due to its own weight is prevented. Moreover, since the weight of the fireproof coating material 15 blown into the first compartment 8a in the first blowing treatment is smaller than the weight of the fireproof coating material 15 filled in the entire first compartment 8a, the fireproof coating is used. The downward flow itself due to the weight of the material 15 is suppressed as compared with the conventional case. Therefore, in the first pressing process, the refractory coating material 15 can be filled up to the upper part of the first section 8a.

After the first pressing process is completed, the refractory coating material 15 blowing process similar to the first blowing process and the pressing process similar to the first pressing process are set for the first section 8a. Repeat alternately for the number of times.

At this time, when the second and subsequent blowing processes are performed, the first section 8a is compacted to the end side away from the first opening 11a by the blowing process and the pressing process performed before that. A layer of the fireproof coating material 15 is formed. Therefore, the phenomenon that the refractory covering material 15 blows through from the first section 8a to the second section 8b is more reliably prevented.

Therefore, in the second and subsequent blowing treatments, the refractory coating material 15 blown into the first compartment 8a can be attached to the inside of the first compartment 8a without causing a stairwell. The refractory coating material 15 adhering to the inside of the first compartment 8a is separated from the first opening 11a in the first compartment 8a by the subsequent pressing treatment, similarly to the first pressing treatment. It can be packed to the side while being compacted.

When the final blowing process is performed, the refractory coating material 15 is already filled in the region on the side separated from the first opening 11a in the first section 8a. Therefore, in the final blowing process, the distance from which the refractory coating material 15 should be blown from the first opening 11a is shortened. Therefore, in the last blowing treatment, it is easier to manage the filling state of the refractory coating material 15 than in the previous blowing treatments. Therefore, after the last blowing treatment, the trowel 19 is used. The same pressing process as the first pressing process used may or may not be performed.

As a result, as shown in FIG. 5C, the first compartment 8a is filled with the refractory coating material 15. When the fireproof coating material 15 is filled to the extent that it protrudes from the first opening 11a, the fireproof coating construction method of the present embodiment ends the first filling step.

After the first filling step is completed, a closing tool removing step of removing and removing the temporarily provided closing tool 18 is performed. As a result, in the space portion 8, the plate-shaped member 20 arranged at the boundary between the first compartment 8a and the second compartment 8b is removed.

In the fireproof coating construction method of the present embodiment, when the closing tool removing step is completed, the second filling step of filling the second section 8b with the fireproof coating material 15 is started.

In the second filling step, first, as shown in FIG. 6A, the refractory coating material 15 is first blown into the second section 8b from the second opening 11b. This blowing process may be performed in the same manner as the first blowing process for the first section.

Further, the amount of the fireproof coating material 15 blown into the second compartment 8b in the first blowing treatment is the volume of the second compartment 8b determined in advance from the design information and the like, and the fireproof coating set for the second compartment 8b. The amount may be set to correspond to the value obtained by dividing by the number of times the material 15 is blown.

When a predetermined amount of the refractory coating material 15 is blown into the second compartment 8b in this way, most of the refractory coating material 15 is opened in the second compartment 8b due to the momentum injected from the nozzle. It adheres to the end side that separates from the portion 11b.

At this time, since the first compartment 8a is already filled with the refractory coating material 15, the refractory coating material 15 blown into the second compartment 8b does not cause a stairwell in the second compartment 8b. Can be attached to the inside.

When the first blowing treatment is completed, in the second section 8b, as shown in FIG. 6B, the refractory covering material 15 adhering to the inside of the second section 8b is removed by using the trowel 19. The first pressing process of pressing in the direction away from the opening 11b of the above is performed. This pressing process may be performed in the same manner as the pressing process in the first section 8a.

At this time, since the lath 16 for closing the recess 14a is attached to the pillar 1, when the fireproof coating material 15 is pressed, the fireproof coating material 15 does not enter the recess 14a of the pillar 1, and thus the fireproof coating material A force due to pressing can be reliably applied to 15.

As a result, the refractory coating material 15 is filled on the end side of the second compartment 8b that is separated from the second opening 11b. Similar to the pressing process in the first section 8a, the pressing process in the second section 8b also prevents the fireproof coating material 15 from flowing downward due to its own weight, and the fireproof coating reaches the upper part of the second section 8b. The material 15 can be filled.

After the first pressing process is completed, the second section 8b is provided with the same refractory coating material 15 blowing process as the first blowing process and the same pressing process as the first pressing process. Repeat alternately for the number of times. Each process may be performed in the same manner as the process for the first section.

As a result, as shown in FIG. 6C, the second compartment 8b is filled with the refractory coating material 15. Therefore, in the fireproof coating construction method of the present embodiment, the second filling step is completed.

After that, as shown in FIG. 6D, each flange 12 of the pillar 1 and the web 13 are exposed toward the inside of the building, and the inner surface of the outer wall 7 is exposed toward the inside of the building. A treatment is performed in which the fireproof coating material 15 is attached to the pillar 1 and the outer wall 7 at a thickness and density required for the desired fireproof performance.

As described above, a fireproof coating is formed around the pillar 1 in the building of the mechanical parking device and on the entire inner surface of the outer wall 7.

As described above, according to the fireproof coating construction method of the present embodiment, in the building of the mechanical parking device, the fireproof coating material 15 is provided for the corner portion where the space portion 8 exists between the pillar 1 and the outer wall 7. A fireproof coating can be applied by filling the space 8 of the above.

Further, when the space portion 8 of the corner portion is filled with the fireproof coating material 15, it is possible to prevent the fireproof coating material 15 from blowing through, so that the amount of the fireproof coating material 15 used for the construction of the fireproof coating is larger than that of the conventional one. , The amount can be close to the volume of the space portion 8 of the corner portion.

Further, in the fireproof coating construction method of the present embodiment, when the first compartment 8a and the second compartment 8b are filled with the fireproof coating material 15, the fireproof coating material 15 is blown into a plurality of times. Since the refractory coating material 15 is pressed once the blowing treatment is performed, it is possible to prevent the refractory coating material 15 from flowing downward due to its own weight. Therefore, it is possible to prevent an insufficiently filled portion from being generated on the upper end side of the space due to the flow of the filled refractory coating material 15, and this also makes it possible to reduce the amount of the refractory coating material 15 used for the construction of the fireproof coating. The amount can be closer to the volume of the space portion 8 of the corner portion.

Moreover, the phenomena such as the blow-by of the refractory covering material 15 and the insufficient filling due to the flow, which have occurred in the past, have different influences depending on the construction site such as the size of the space 8 and the conditions when the refractory covering material 15 is blown. receive. Therefore, conventionally, it has been difficult to accurately control the amount of the fireproof coating material 15 used according to the construction site. On the other hand, in the fireproof coating construction method of the present embodiment, it is not necessary to consider the phenomenon of insufficient filling due to the stairwell and flow, so that the amount of the fireproof coating material 15 used can be more accurately determined according to the construction site. Can be managed. Therefore, the fireproof coating construction method of the present embodiment can also obtain the effect of improving the workability as compared with the conventional method.

In the present embodiment, after the first filling step of filling the first compartment 8a with the fireproof coating material 15, the closing tool 18 is removed from the space 8, and then the second compartment 8b is fireproof. Since the second filling step of filling the covering material 15 is started, the closing tool 18 does not remain in the space. Therefore, the closing tool 18 can enhance the selectivity of the material of the plate-shaped member 20, and can facilitate the production of the closing tool 18.

The present invention is not limited to the above embodiment.

For example, the number of times the fireproof coating material 15 is blown into the first section 8a and the number of times the fireproof coating material 15 is blown into the second section 8b may be the same number or different. ..

Further, the number of times the fireproof coating material 15 is blown into the first section 8a and the second section 8b may be once, respectively. In this case, the effect of preventing the atrium by the closing tool 18 installed at the boundary between the first section 8a and the second section 8b and the amount of the refractory covering material 15 used accordingly are reduced in the corner portion as compared with the conventional case. It is possible to obtain the effect that the volume can be set to be close to the volume of the space portion 8.

The closing tool 18 does not have to remove the plate-shaped member 20 arranged at the boundary between the first section 8a and the second section 8b before performing the second filling step. In this case, since the closing tool 18 is embedded in the refractory coating, only the plate-shaped member 20 may be configured. The closing tool 18 that is not removed in this way may be attached to the pillar 1 or the furring strip 4 when constructing the building of the mechanical parking device.

If the closing tool 18 has an end face 18a that can be arranged at a position (see FIG. 2B) that is a boundary between the first section 8a and the second section 8b, for example, a rectangular parallelepiped shape, a triangular prism shape, or the like. It may have a shape or configuration other than those shown in the figure, such as a semi-cylindrical shape. The material of these fasteners 18 is not particularly limited, such as metal, resin, wood, and paper such as corrugated cardboard. Further, the closing tool 18 may have a hollow structure, or may have a solid structure made of foamed resin, corrugated cardboard, or the like.

Further, the closing tool 18 has a rectangular parallelepiped shape formed of a material having elasticity, and is arranged by being pushed between the second side portion 9b of the pillar 1 and the inner surface of the second side wall 10b. An end face exposed on the side of the first compartment 8a may be formed at a position serving as a boundary between the first compartment 8a and the second compartment 8b.

Further, the end surface 18a of the closing tool 18 does not have to be a flat surface.

In the above embodiment, the iron 19 is exemplified as the presser foot. On the other hand, in the presser foot, the fireproof coating material 15 adhering to the inside of the first section 8a and the second section is separated from the corresponding openings 11a and 11b by the blowing treatment of the fireproof covering material 15. Any shape or structure other than the trowel 19 may be adopted as long as it has a shape, rigidity, and strength capable of performing the pressing process. For example, as the presser foot, a square pipe, a square pillar, or the like may be used. Further, as the material of the presser foot, various materials such as metal, resin, wood, and paper such as corrugated cardboard may be adopted.

The pillar 1 may have a square shape or a rectangular shape. Further, although the example in which the pillar 1 is made of shaped steel is shown, it may be a hollow square tubular pillar 1 or a solid square rod-shaped pillar 1. The planar shape of the pillar 1 may have rounded corners.

A first section 8a to be filled with the refractory coating material 15 may be formed first on the side of the pillar 1 to which the lath 16 is attached.

Similar to the method shown in FIG. 2A, the fireproof coating construction method of the present invention provides mechanical parking if the building has a corner portion having a space portion 8 between the pillar 1 and the outer wall 7. It may be applied to any building other than the building of the device.

Of course, various other changes can be made without departing from the gist of the present invention.

1 Pillar 7 Outer wall 8 Space 8a First compartment 8b Second compartment 9a, 9b Sides 10a, 10b Side wall 11a First opening 11b Second opening 12 Flange 13 Web 14a, 14b Recess 15 Fireproof coating material 16 Lath 18 Closure 19 Iron (holding tool)

Claims (4)

A pillar outer planar shape extending in the vertical direction in the square, and an outer wall having two side walls which are disposed with a gap to the outside of the two sides across one corner of the column, on the outside of said post It is provided with a furring strip that is attached and extends in the lateral direction and arranged in a plurality of stages in the vertical direction, and a space portion in which the planar shape formed between the pillar, the outer wall, and the furring strip adjacent to the top and bottom is a bent shape. It is a fireproof coating construction method that applies a fireproof coating to the corners of a building.
The space portion has a first compartment formed by a region along one side and a corner portion of the bent shape, and a second compartment formed by a region along the other side .
The first compartment has a first opening that communicates with the outside of the space.
The second compartment has a second opening that communicates with the outside of the space.
The closure has a rectangular end face, the dimensions in the long side direction of the end face are set to the distance between the furring strips arranged vertically, and the dimensions in the short side direction of the end face are the pillar and the outer wall. It is set to the interval with
A closing tool installation step of inserting the closing tool into the second section through the second opening and installing the closing tool in a posture of partitioning the first section and the second section by the end face .
From the first opening communicating with the first compartment is blown with refractory coating material to the inside of the first compartment, a first filling step of filling the refractory coating material in the first compartment ,
From the second opening communicating with the second compartment is blown with the fireproofing material on the inside of the second compartment, a second filling step of filling the refractory coating material in said second compartment A fireproof coating construction method characterized by performing. The first filling step is
A process of spraying the refractory coating material to the inside of the first compartment from the first opening,
Said refractory coating material is sprayed on the inside of the first compartment, the step of performing a process of pressing the depth direction of the first compartment from the first opening by the pressing member, the alternate,
The second filling step is
A process of spraying the refractory coating material to the inside of the second compartment from said second opening,
Claim to the step of performing said refractory coating material is sprayed on the inside of the second compartment, and the process for pressing the inner direction of said second compartment from said second opening by the pressing member, the alternate The fireproof coating construction method according to 1. The fireproof coating construction method according to claim 1 or 2, wherein after the first filling step, a closing tool removing step of removing the closing tool from the space portion is performed, and then the second filling step is performed. The column shall be made of either H-section steel, I-section steel or channel steel.
Furthermore, a recess formed on the inner side of the pair of flanges and the web in the section steel, said the first compartment or recess that is positioned facing the second compartment, Las closing the recess The fireproof coating construction method according to any one of claims 1 to 3, wherein the attachment process is performed.

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