JP5955657B2 - Fireproof coating unit and fireproof coating method - Google Patents

Description

  The present invention relates to a fireproof coating unit provided on a steel column and a fireproof coating method using the fireproof coating unit.

  In order to prevent deformation or the like that hinders structural strength, parts such as pillars and walls of a building may be required to have a fireproof structure or a fireproof structure having a predetermined fire resistance. For example, in the case of providing fire resistance performance to a building having a steel structure as a main structure, a predetermined fireproof covering structure is formed by covering a steel column or a steel beam of the steel structure with a fireproof covering material. Yes.

  In addition, regarding the fireproof coating of steel frames, while the application of the fireproof performance verification method is spreading as a specification rule, relaxation of the fireproof time is recognized, but reliable quality assurance is required. It is known that a fireproof coating structure using a fireproof board, a calcium silicate plate, or the like is used as a fireproof coating for a steel aggregate in a dry method.

  For example, Patent Document 1 discloses a fireproof covering structure in which a steel column is covered with a fireproof board. In this fireproof covering structure, a fireproof board made of a reinforced gypsum board having a thickness of about 20 mm is positioned by a steel runner, and is arranged with a space of about 5 mm between the steel pillar and the fireproof board and the surface of the steel pillar. The gap is filled with an adhesive. As a result, two or three surfaces of the steel column are covered with the fireproof board.

  However, in this type of fireproof coating structure, the thickness of the fireproof board increases with the thickness of the fireproof board and the thickness of the adhesive, increasing the thickness of the wall that houses the steel column, or extending the steel column to the indoor side. There was a problem of having to pay.

  On the other hand, as shown in Patent Document 2, the present applicants, as a fireproof covering unit for covering the periphery of an H-shaped steel column, have a calcium silicate plate on two surfaces in contact with the flange of the steel column. The proposal concerning the structure which arrange | positions and arrange | positions a galvanized steel plate to the remaining two surfaces is performed. In this fireproof coating unit, both ends of a galvanized steel plate are bent into a shape that covers a steel column web along the calcium silicate plate, and a heat insulating expansion sheet is disposed inside the galvanized steel plate. . A rock wool plate is disposed inside the zinc steel plate and in the hollow portion of the steel column. Moreover, it is set as the structure which wraps the steel strip as a reinforcement member around the joint of two galvanized steel plates, nails and fixes, and hold | maintains a calcium-silicate board. With such a fireproof coating unit, workability on site can be ensured, and fireproof performance can be imparted without significantly increasing the thickness of the steel column in the flange direction.

Japanese Patent Laid-Open No. 9-100587 Japanese Patent No. 4137301

  In the conventional fireproof covering unit, since the thickness of the steel column is not increased, the degree of freedom in design is increased, but there are problems as described below, and there is still room for improvement.

  For example, the outer wall material and the steel column arranged on the indoor side may be close to each other, such as a corner of a building or a side of an opening. In such a case, only a gap of about several tens of mm is provided between the side portion of the steel column and the indoor side surface of the outer wall material. Then, it is difficult to put the operator's hand into the narrow space between the outer wall material and the steel column, and the steel strip is wound around the zinc steel plate of the fireproof coating unit, or the steel strip is fixed by nailing. I couldn't do work.

  Therefore, in such a case, instead of disposing the fireproof covering unit over the entire circumference of the steel column, the side of the steel column not facing the outer wall material is covered with the fireproof covering unit, and the fire resistance performance of the remaining surface is It was supposed to be secured by the fire resistance of the outer wall material. As a result, since the types of applicable outer wall materials are limited, a fireproof coating unit excellent in workability capable of realizing a predetermined fireproof coating structure without depending on the fireproof performance of the outer wall materials has been demanded.

  The present invention has been made in view of such points, and the object of the present invention is excellent in fire resistance, and even when the outer wall material and the steel column are close to each other, the steel column is not increased in thickness. An object of the present invention is to provide a steel column fireproof covering unit that can be provided with good workability and has improved workability on site, and a fireproof covering method thereof.

In order to achieve the above object, the solution of the present invention includes a first covering plate that covers at least two surfaces around the steel column and a second covering plate that covers the remaining surface around the steel column. And a fireproof coating unit comprising a plurality of coupling plates for coupling these coating plates to each other, the first coating plate and the second coating plate, a metal plate on the outer surface side having fire resistance performance, and a steel column It is formed into a groove shape having a front plate portion and a side plate portion extending to the front plate portion . Further, the coupling plate is formed of a foldable strip plate material, and one end portion of the coupling plate is rotatably attached to the outer surface of the side plate portion of the first cover plate. Then, the coupling plate is rotated along the outer surface of the first cover plate, spanned between the first cover plate and the second cover plate, and is directly moved from the side plate portion of the second cover plate. Bending is performed along the face plate portion, and the other end portion of the coupling plate is fixed to the outer surface of the front plate portion of the second cover plate.

By this specific matter, the first covering plate is inserted between the steel column and the outer wall material to cover the side surface close to the outer wall material, and the second covering plate is disposed on the inner side surface of the steel column. Thus, these cover plates can be fixed together by the coupling plate. Since the coupling plate is rotatable with respect to the first covering plate, the other end portion of the coupling plate is pulled out from the first covering plate to the indoor side, and is fastened to the second covering plate by a fastener. Installation work can be easily performed. In addition, since the connecting plate is made of a foldable strip plate material, it can be bridged from the first covering plate to the second covering plate and bent along the second covering plate. Enhanced. When the coupling plate is bridged from the first covering plate to the second covering plate and coupled to each other, the other end of the coupling plate can be wound around the front plate portion of the second covering plate. It becomes possible to perform the fastening operation from the indoor side of the steel column. When fire-proofing an H-shaped steel column, the front plate portion can be disposed across the left and right flanges, and the side plate portion can be disposed on the outer surface side of the flange. Therefore, it is possible to provide a fireproof coating structure having a predetermined fireproof performance by working from the indoor side where there is room in the work space with respect to the steel column provided close to the outer wall material, which is excellent in workability. Can be. Moreover, since a steel column can be made into a fireproof covering structure by this, the kind of outer wall material which adjoins is not limited, and it becomes possible to raise the freedom degree of design.

  The following is mentioned as a more concrete structure of the said fireproof covering unit.

  That is, in the fireproof covering unit, it is preferable that the coupling plate is configured to be evenly arranged in the height direction on the left and right side edges of the first covering plate.

  Thereby, it can be set as the structure which couple | bonds a 1st coating plate and a 2nd coating plate stably, and can hold | maintain the fireproof heat insulating material etc. with which the outer surface of a steel column is equipped, without dropping off.

  In the fireproof coating unit, it is preferable that the coupling plate is made of a galvanized steel plate, an iron plate, or a stainless steel plate and has a thickness of 0.2 to 1.0 mm.

  Thereby, it is possible to easily fold the coupling plate while giving fire resistance to the coupling plate, and the operator can easily fold the coupling plate by hand. In addition, since it is possible to drive a simple fastener such as an iron nail into the coupling plate, the other end of the coupling plate can be secured to the second cover plate with a simple operation. It can be made excellent in properties.

  Moreover, the fireproof coating method using the fireproof coating unit according to each of the above-described solutions is also within the scope of the technical idea of the present invention. That is, a fireproof coating method for covering the periphery of an H-shaped steel column arranged along the wall surface is assumed. In addition, as the fireproof covering unit, there are provided first and second cover plates formed in a groove shape and provided with a heat-expandable fireproof material on the inner surface side, and a strip-shaped connecting plate for connecting these cover plates together. A unit having a configuration in which one end of the coupling plate is rotatably attached to the outer surface of the first cover plate is used. And as a fireproof coating method, while arrange | positioning a calcium-silicate board along the flange outer surface of the said steel column, the pre-process which arrange | positions a rock wool material along a web, and the 2nd of the said fireproof coating unit A step of covering the steel plate with the edge surface of the flange facing the indoor side of the steel column and the rock wool material so as to straddle the left and right calcium silicate plates; and the first cover plate of the fireproof coating unit Is inserted between the steel column and the wall surface, and is placed so as to straddle the left and right calcium silicate plates, covering the edge surface of the flange facing the room opposite to the interior of the steel column and the rock wool material. And rotating the coupling plate to pull out the other end portion of the coupling plate to the indoor side of the first covering plate; and connecting the other end portion of the pulled out coupling plate to the second covering plate. Bend along the outer surface Arrangement and has a configuration obtained by and a step of fixing the fastening device in the second cover plate and calcium silicate board.

  By such a fire-resistant coating method, a fire-resistant coating structure having a predetermined fire-resistant performance can be easily obtained by working from the indoor side where there is room in the work space for an H-shaped steel column provided close to the outer wall material. It can be formed and can be extremely excellent in workability.

  In the present invention, as the fireproof covering unit, the first cover plate and the second cover plate are formed from a metal plate having fireproof performance, and a thermally expandable fireproof material is provided on the inner surface side arranged toward the steel column. It is set as the arrangement | positioning. Further, the coupling plate is formed from a foldable strip plate material, one end of the coupling plate is rotatably attached to the outer surface of the first covering plate, and the coupling plate is disposed along the outer surface of the first covering plate. It is made to rotate, it is spanned over the said 1st coating plate and the 2nd coating plate, and it has the structure which fastens the other end part to the said 2nd coating plate. For this reason, it is possible to form a fireproof covering structure over the entire circumference of the steel column by work from the indoor side of the steel column, providing sufficient fire resistance, and even when the outer wall material and the steel column are close to each other, It is possible to construct a steel column with good workability without increasing the wall thickness. As a result, a predetermined fireproof covering structure can be realized without depending on the fireproof performance of the outer wall material, and the degree of freedom in design can be increased.

FIG. 1 is a cross-sectional view showing an example of a fireproof covering unit according to an embodiment of the present invention. 2 (a) to 2 (c) show a first cover plate in the fireproof covering unit, FIG. 2 (a) is a top view, FIG. 2 (b) is a front view, and FIG. 2 (c) is a right side view. FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 4 is a partially enlarged cross-sectional view of the first cover plate shown in FIG. Drawing 5 is an explanatory view showing one process of a fireproof covering construction method concerning an embodiment. FIG. 6 is an explanatory view showing the next step of FIG. FIG. 7 is an explanatory view showing the next step of FIG. FIG. 8 is an explanatory view showing the next step of FIG. 7 and showing a state in which a fireproof covering unit is constructed on a steel column. FIG. 9 is a cross-sectional view showing another example of the housing of the fireproof covering unit according to the embodiment.

  Hereinafter, a fireproof coating unit and a fireproof coating method according to embodiments of the present invention will be described with reference to the drawings.

  1 to 4 show a fireproof covering unit according to an embodiment of the present invention, and FIG. 1 is a cross-sectional view showing an example of a housing in which the fireproof covering unit 1 is constructed on a steel column 6 adjacent to the outer wall material 7. It is. 2 (a) to 2 (c) show the first covering plate 11 in the fireproof covering unit 1, FIG. 2 (a) is a top view, FIG. 2 (b) is a front view, and FIG. It is a right view. 3 is a cross-sectional view taken along line AA in FIG. 2B, and FIG. 4 is a partially enlarged cross-sectional view of FIG.

  In FIG. 1, in order to make the drawing easy to see, constituent members other than the steel column 6 are not shown by hatching showing a cross section. The first cover plate 11 has a bottom view that is symmetrical with a top view of FIG. 2A and a left side view that is symmetrical with the right side view of FIG. 2C.

  The fireproof covering unit 1 includes a first covering plate 11 that covers at least two surfaces around the steel column 6, a second covering plate 12 that covers the remaining surface around the steel column 6, and these first covering plates. 11 and the second covering plate 12 are provided with a plurality of connecting plates 13.

  In the form shown in FIG. 1, the steel column 6 is made of an H-shaped steel material having a web 61 and a flange 62. On the other hand, in the fireproof coating unit 1, the first cover plate 11 and the second cover plate 12 are formed in a common groove shape having a substantially U-shaped cross section. The first cover plate 11 and the second cover plate 12 form a pair as a set of units arranged around the steel column 6.

  As shown in FIGS. 1 and 2, the groove shapes of the first cover plate 11 and the second cover plate 12 are arranged in parallel with the front plate portion 31 arranged in parallel with the web 61 of the steel column 6 and the flange 62. It is comprised by the side plate part 32 made. The side plate portion 32 extends at right angles to the left and right side edge portions of the front plate portion 31. The front plate portion 31 is formed with a width larger than the width of the web 61 of the steel column 6, and the side plate portion 32 is formed with a width narrower than the width of the flange 62.

  In addition, in the steel column 6 shown in FIG. 1, between the first covering plate 11 and the steel column 6 and between the second covering plate 12 and the steel column 6, before the fireproof covering unit 1 is disposed. Further, a fireproof heat insulating material such as a calcium silicate plate 81 or a rock wool material 82 is interposed. The procedure of the fireproof coating method for the steel column 6 using the fireproof coating unit 1 will be described later.

  As shown in FIGS. 2 to 4, the first cover plate 11 is a composite of a metal plate 21 that constitutes the outer surface side and has fire resistance performance, and a thermally expandable refractory material 22 that constitutes the inner surface side. . The first cover plate 11 is disposed so that the thermally expandable refractory material 22 on the inner surface side faces the steel column 6.

  Examples of the metal plate 21 constituting the outer surface side of the first cover plate 11 include a galvanized steel plate, an iron plate, or a stainless steel plate. Among these, a galvanized steel sheet having a high yield point strength at a high temperature is particularly preferable as the metal plate 21.

  Moreover, it is preferable that the thickness of the metal plate 21 in the 1st coating plate 11 shall be 0.2-0.6 mm. If the thickness is less than 0.2 mm, the fire resistance effect cannot be sufficiently increased. If the thickness exceeds 0.6 mm, the fire resistance effect does not change so much, which is economically disadvantageous.

  These configurations related to the first cover plate 11 are common to the second cover plate 12 paired with the first cover plate 11.

  The heat-expandable refractory material 22 on the inner surface side of the metal plate 21 forms a heat insulating layer by being heated and expanded in the event of a fire, and prevents heat from being transmitted to the steel column 6 by the heat insulating layer. For this reason, the heat insulation layer by the heat-expandable refractory material 22 needs to be formed so as to contact at least the edge surface of the flange 62 of the steel column 6. In the form shown in FIG. 3, the thermally expandable refractory material 22 is disposed on the entire inner surface of the metal plate 21, but the volume expansion ratio of the thermally expandable refractory material 22 (ratio of the thickness after expansion to the initial thickness). Depending on the case, the metal plate 21 may not necessarily be disposed over the entire inner surface.

  The heat-expandable refractory material 22 provided on the first cover plate 11 and the second cover plate 12 is required if the volume expansion ratio is 2 to 20 times when this is heated for about 30 minutes to saturate the expansion. It is said to satisfy the performance. That is, as the thermally expandable refractory material, it is preferable to use a sheet-like molded body that satisfies the performance standard for 2-hour fire resistance specified in JIS A1304 and has a volume expansion ratio of 2 to 20 times during heating. Moreover, it is preferable that the heat-expandable refractory material 22 includes a thermoplastic resin such as butyl rubber, a heat-expandable inorganic compound such as heat-expandable graphite, and an inorganic filler.

  Examples of the sheet-like molded body include fibro (manufactured by Sekisui Chemical Co., Ltd., trade name; polyolefin resin or synthetic rubber resin component, and thermally expandable resin mixed with thermally expandable graphite, inorganic filler, etc. And a sheet-like molded product made of the composition).

  The thickness of the heat-expandable refractory material 22 is set according to the resin material to be used and the volume expansion ratio, but is preferably 0.3 to 5.0 mm in the present embodiment. Thereby, at the time of a fire, the heat insulation layer of sufficient thickness can be formed in the inner surface side of the metal plate 21. FIG.

  As shown in FIGS. 1 and 2, a plurality of coupling plates 13 are provided on the outer surfaces of the left and right side plate portions 32 of the first cover plate 11. On the other hand, the side plate portion 32 of the second cover plate 12 is not provided with the coupling plate 13.

  Specifically, as shown in FIGS. 2B and 2C, the coupling plate 13 is provided on the left and right side plate portions 32 of the first cover plate 11, and is arranged substantially equally in the height direction. ing. In the illustrated embodiment, the first cover plate 11 having a height of 1250 mm is arranged at substantially equal intervals at three locations, the upper stage, the middle stage, and the lower stage of the side plate part 32.

  As shown in FIGS. 2C and 4, one end of each coupling plate 13 is joined to the outer surface of the side plate portion 32 of the first covering plate 11 by a joining tool 41 such as a driving rivet. . Thus, each coupling plate 13 is rotatable along the outer surface of the side plate portion 32. Among the plurality of coupling plates 13, the coupling plates 13 disposed on the upper and middle sides of the side plate portion 32 are attached in a state where they hang down with the other end portion down. The coupling plate 13 disposed in the lower stage is attached in a state where the other end is flipped up.

  Moreover, it is preferable that the coupling plate 13 consists of a galvanized steel plate, an iron plate, or a stainless steel plate, and thickness is 0.2-1.0 mm. Thereby, the coupling plate 13 can be formed easily by an operator by hand, and a foldable strip plate material having fire resistance can be obtained.

  The coupling plate 13 is arranged so that the second covering plate 12 holds both the left and right calcium silicate plates 81 with respect to the steel column 6 shown in FIG. The second cover plate 12 covers the indoor rock wool material 82, the edge surfaces of the flange 62, and the corners of the left and right calcium silicate plates 81.

  Moreover, the 1st coating board 11 is arrange | positioned so that the opposite side (outer wall side) of the right-and-left calcium silicate board 81 may be hold | maintained. Further, the first cover plate 11 covers the rock wool material 82 on the outer wall side, the edge surfaces of the flange 62, and the corners of the left and right calcium silicate plates 81.

  Each coupling plate 13 provided on the side plate portion 32 of the first cover plate 11 is rotated along the side plate portion 32 of the first cover plate 11, and the first cover plate 11 to the second cover plate 12. It is stretched over. The other end of the coupling plate 13 is bent and deformed along the outer surface of the second cover plate 12. The other end of the coupling plate 13 is fixed to the second covering plate 12 and the calcium silicate plate 81 by a fastening tool 42.

  Thereby, even in the portion where the outer wall material 7 and the steel column 6 are arranged close to each other as shown in FIG. 1, the fireproof covering structure can be satisfactorily formed on the entire four circumferences of the steel column 6.

  In addition, the fireproof covering unit 1 which concerns on this invention can be implemented with other various forms besides the said embodiment. For example, the steel column 6 is not limited to an H-type steel material, but may be an I-type steel material or a square steel pipe. The fireproof covering unit 1 includes a first covering plate 11 that covers two adjacent surfaces around the steel column 6 and a second covering plate 12 that covers the remaining surface around the steel column 6. It is comprised so that it may form a character shape and may be arrange | positioned so that the four circumferences of the steel column 6 may be entangled.

  The length of one coupling plate 13 is set according to the size of the steel column 6 and the thickness of the calcium silicate plate 81, but the distal end portion of the coupling plate 13 drawn out indoors is the second covering plate 12. It is preferable to project about 20 mm from the outer surface. Moreover, the width | variety of the coupling plate 13 can be formed in arbitrary magnitude | sizes if it is a width | variety which can be accommodated in the width | variety of the side plate part 32 of the 1st coating | coated board 11. In addition, the height, width, and the like of the first covering material 11 and the second covering material 12 are not limited to the above-described embodiment, and one set or a plurality of sets of fireproof covering units 1 are arranged in the height direction of the steel column 6. May be arranged in any manner.

  Furthermore, the other end portion of the coupling plate 13 may be formed with a notch portion that is small enough to hook a finger. Thereby, the coupling plate 13 can be configured to be easily pulled out from the first cover plate 11 to the indoor side.

(Fireproof coating method for steel columns)
Next, a fireproof coating method for the steel column 6 using the fireproof coating unit 1 will be described with reference to the drawings.

  5-8 is explanatory drawing which shows the process of coat | covering the said fireproof covering unit 1 to the steel pillar 6 in steps, FIG. 9 is a fireproof covering unit 1 with respect to the steel pillar 6 adjacent to the outer wall material 7. FIG. It is sectional drawing which shows the other example of accommodation which constructed | assembled.

  5-8, the steel column 6 is partially represented and demonstrated, and the front side in the figure is shown as the indoor side. Further, in FIG. 9, in order to make the drawing easy to see, constituent members other than the steel column 6 are not shown by hatching showing a cross section.

  The fireproof coating of the steel column 6 is performed by working from the indoor side after starting up the main structural parts such as column beams of the building and forming the outer wall and the roof.

  As shown in FIG. 5, a calcium silicate plate 81 is disposed on each of the steel columns 6 along the outer surface of the flange 62. The calcium silicate plate 81 has a thickness of about 25 mm and covers the entire outer surface of the flange 62. Thereby, the heating from the outside of the flange 62 is interrupted. Since the calcium silicate plate 81 is held on the steel column 6 by the fireproof coating unit 1 in a later step, it is sufficient to press and arrange the flange 62, but the structure is fixed or temporarily fixed with an adhesive. Also good.

  Next, rock wool materials 82 having a certain strength and having a predetermined fire resistance are disposed on both the indoor side and the outer wall side along the web 61 of the steel column 6. As the rock wool material 82, a rock wool molding plate or a rock wool blanket can be used. When a rock wool molding plate is provided as the rock wool material 82, the rock wool molding plate itself has a self-supporting strength, so that it is only necessary to fill the space between the left and right flanges 62. The rock wool material 82 reinforces the heat insulation performance for the steel column 6.

  Next, as shown in FIG. 6, the second covering plate 12 of the fireproof covering unit 1 is arranged on the indoor side of the steel column 6. The second cover plate 12 is disposed so as to straddle the left and right calcium silicate plates 81. The second cover plate 12 covers the rock wool material 82, the edge surfaces of the flange 62, and the corners of the left and right calcium silicate plates 81. The side plate portion 32 of the second cover plate 12 is arranged to partially cover the outer surface side of the left and right calcium silicate plates 81.

  Next, the fastening device 42 is driven into the front plate portion 31 of the second cover plate 12, and the second cover plate 12 is fixed near the calcium silicate plate 81. An iron round nail can be used for the fastening tool 42, and it can be easily driven from the indoor side of the steel column 6. The fasteners 42 are preferably arranged evenly with respect to the front plate portion 31. For example, in the case of the second cover plate 12 having a height of 1250 mm, it is desirable that the nailing pitch be about 200 mm.

  Next, the first cover plate 11 is disposed on the opposite side of the steel column 6. In this case, the 1st coating board 11 is inserted between the steel pillar 6 and a wall surface, and it arrange | positions so that the left and right calcium silicate board 81 may be straddled. As shown in FIG. 7, the first cover plate 11 covers the rock wool material 82 on the wall surface side, the edge surface of the flange 62, and the side of the left and right calcium silicate plates 81. When the gap between the steel column 6 and the wall surface is narrow and it is difficult to insert a hand, the first cover plate 11 may be inserted while being bent somewhat.

  Next, the coupling plate 13 of the first covering plate 11 is rotated along the side plate portion 32 (see FIG. 2C), and the other end of the coupling plate 13 is pulled out to the indoor side of the first covering plate 11. At this time, by simply inserting a hand between the steel column 6 and the wall surface and hooking and moving a finger on the other end of the coupling plate 13, the coupling plate 13 can be easily rotated and pulled out indoors. it can. All the coupling plates 13 provided on the first cover plate 11 are pulled out to the indoor side. As a result, the other end of the coupling plate 13 protrudes along the side plate 32 of the second cover plate 12. In addition, the coupling plate 13 can be displaced and disposed in a form that extends between the first cover plate 11 and the second cover plate 12 in a substantially horizontal direction.

  Next, the other end portion of the drawn coupling plate 13 is bent along the corner portion of the second cover plate 12 as shown in FIG. Thereby, the other end portion of the coupling plate 13 can be bent and arranged along the outer surface of the front plate portion 31 of the second cover plate 12. Depending on the size and arrangement form of the steel column 8, the coupling plate 13 may be arranged on the second covering plate 12 without being bent.

  Next, a fastening tool 42 is driven into the other end portion of the coupling plate 13, and the coupling plate 13 is fixed to the second cover plate 12 and the calcium silicate plate 81. Also in this case, iron round nails can be used for the fastening device 42. In this way, the fastening operation of the second cover plate 12 can also be easily performed from the indoor side of the steel column 6.

  Thus, the first cover plate 11 and the second cover plate 12 hold the calcium silicate plate 81 and the rock wool material 82 provided along the steel column 6 and cover the web 61 of the steel column 6. It is fixed by tying in a form. Therefore, there is no possibility that the calcium silicate plate 81 falls off from the steel column 6, and the fireproof covering structure can be stably maintained.

  Further, since the thermally expandable refractory material 22 on the inner surface side of the first cover plate 11 and the second cover plate 12 expands when heated, the first cover plate 11 and the second cover plate 12 are connected by the coupling plate 13. There is no need for a strong bond. In other words, it is preferable that the desired fire resistance performance that blocks heat from the flame is exhibited by sufficiently expanding the thermally expandable refractory material 22 to form a foam. Therefore, the fireproof covering unit 1 is fixed by rotating the connecting plate 13 along the outer surface of the first covering plate 11, spanning the first covering plate 11 and the second covering plate 12, and the other end of the connecting plate 13. A fireproof coating structure that can sufficiently exhibit the fireproof performance can be formed by an extremely simple operation of fixing the portion to the second cover plate 12.

  Each said process is performed in multiple times over the whole height direction of the steel column 6, and the fireproof covering structure is provided in the whole surface of the steel column 6. FIG. The joints between the first cover plates 11 and the second cover plates 12 are abutted and arranged so as not to cause a gap.

  According to the fireproof coating method for the steel column 6 as described above, for example, even if the outer wall material 7 is disposed close to the two surfaces of the steel column 6 in the corner of the building shown in FIG. A sufficient fireproof covering structure can be formed on the entire circumference of the pillar 6. Therefore, the type of the outer wall material 7 is not limited, and the degree of freedom in design can be increased. Around the steel column 6 with such a fireproof coating, a fireproof coating operation of other structural material such as a beam is performed, and a heat insulating material 51, an inner wall material 52, and the like are disposed to form a wall surface.

  Moreover, as shown in FIG. 9, even when the steel column 6 is disposed close to the outer wall material 7 provided on the side portion of the opening 9, the fireproof coating method can be suitably implemented. That is, even if the steel column 6 and the outer wall material 7 are close to each other and the space between the sash provided in the opening 9 and the steel column 6 is narrow, the fireproof covering unit 1 is disposed on the entire four circumferences of the steel column 6. In addition, sufficient fire resistance can be provided. Thereby, a fireproof covering structure can be formed satisfactorily without increasing the thickness of the wall that houses the steel column 6 at the side of the opening 9.

  In the present invention, the fireproof covering unit 1 is not limited to the portion where the outer wall material 7 is disposed close to the steel column 6 as described above, but is a partition as long as the fireproof performance of the building is required. The present invention can be applied to a steel column 6 adjacent to any wall body such as a wall, and a desired fireproof covering structure can be formed with good workability without increasing the wall thickness.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for making a steel column provided along a wall surface into a fireproof covering structure.

DESCRIPTION OF SYMBOLS 1 Fireproof coating unit 11 1st coating plate 12 2nd coating plate 13 Coupling plate 21 Metal plate 22 Thermally expansible fireproof material 31 Front plate part 32 Side plate part 41 Joint tool 42 Fastening tool 6 Steel pillar 61 Web 62 Flange 7 Outer wall Material 81 Calcium silicate plate 82 Rock wool 9 Opening

Claims (4)

A first cover plate that covers at least two surfaces around the steel column; a second cover plate that covers the remaining surface around the steel column; and a plurality of connecting plates that connect these cover plates to each other A fireproof covering unit comprising:
It said first cover plate and the second cover plate includes a metal plate having a fire resistance constitute an outer side, in complex with thermally expandable refractory material constituting the inner surface is disposed toward the steel columns There, it is formed into a groove shape having a front plate portion, respectively, and a side plate portion that extends in the front plate portion,
The coupling plate is made possible strip plate material bent, one end of said binding plate is rotatably attached to the outer surface of the side plate portions of said first cover plate,
The coupling plate is rotated along the outer surface of the first cover plate, spanned between the first cover plate and the second cover plate, and is connected to the side plate portion of the second cover plate. A fireproof covering unit, wherein the fireproof covering unit is bent along the face plate portion and the other end portion is fixed to the outer surface of the front plate portion of the second covering plate. In the fireproof covering unit according to claim 1,
The fire-resistant coating unit, wherein the coupling plates are equally arranged in the height direction on both left and right edges of the first coating plate. The fireproof covering unit according to claim 1 or 2 ,
The fire-resistant covering unit, wherein the coupling plate is made of a galvanized steel plate, an iron plate, or a stainless steel plate, and has a thickness of 0.2 to 1.0 mm. A fireproof coating method for covering an H-shaped steel column arranged along a wall surface with a fireproof coating unit,
The fireproof coating unit includes a first and second cover plates formed in a groove shape and provided with a heat-expandable fireproof material on the inner surface side, and a bendable strip-shaped connecting plate that connects these cover plates to each other. And one end of the coupling plate is rotatably attached to the outer surface of the first cover plate,
A pre-process of disposing a calcium silicate plate along the flange outer surface of the steel column and disposing a rock wool material along the web;
The second covering plate of the fireproof covering unit is placed on the edge surface of the flange facing the room side of the steel column and the rock wool material, and disposed so as to straddle the left and right calcium silicate plates;
The first covering plate of the fireproof covering unit is inserted between the steel column and the wall surface, and is covered with the flange edge surface and the rock wool material facing the opposite side to the interior of the steel column, and left and right silicic acid. A step of arranging so as to straddle the calcium plate;
Rotating the coupling plate to pull out the other end of the coupling plate to the indoor side of the first covering plate;
A step of bending the other end portion of the pulled-out coupling plate along the outer surface of the second covering plate and fixing the second covering plate and the calcium silicate plate to each other with a fastener. A fireproof coating method characterized by that.

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