Covering material, set for constructing load-bearing portion including covering material, and covering method

Abstract

To provide a covering material, a set for constructing a load-bearing portion including the covering material, and a covering method, which enable easy covering of a load-bearing portion at a construction site.SOLUTION: A covering material 20 of the present invention covers a load-bearing portion 10 extending in the vertical direction Z. The covering material 20 is formed by combining a plurality of part covering materials 21, each of which is equipped with a temporary fixing member 30 that can be temporarily fixed to a fixed member 11 provided on the load-bearing portion 10. The part covering materials 21 can be integrated together so as to cover the surface of the load-bearing portion 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a covering material, a set for constructing a load-bearing part comprising said covering material, and a covering method. [Background technology]

[0002] Various types of coated structural materials have been proposed, each of which comprises a load-bearing portion such as a pillar and a coating material that covers the surface of the load-bearing portion. For example, the present applicant previously proposed a structural material comprising a steel member and inner and outer layers made of solid wood covering the steel member, the outer layer of which burns and is destroyed when exposed to flames (Patent Document 1).

[0003] Patent Document 2 discloses a fire-resistant coating structure that includes a steel member and a plurality of wooden coating materials surrounding the steel member, and a backing plate for closing the joint where the end faces of adjacent wooden coating materials butt together is provided on the steel member side. Patent Document 3 discloses a fire-resistant structure comprising a steel member, an air layer surrounding the steel member, and a wood fire-resistant covering material surrounding the air layer, the wood fire-resistant covering material having three or more flame penetration prevention corners and fire-resistant material facing the air layer and connecting adjacent flame penetration prevention corners. Patent Document 4 discloses a fire-resistant covering structure comprising a steel pipe, a plurality of wood fire-resistant covering materials arranged around the steel pipe, and corner base materials supporting adjacent wood fire-resistant covering materials, the corner support materials having a pair of flange portions that are bent and attached along the corners where the ends of the adjacent wood fire-resistant covering materials abut. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-112906 [Patent Document 2] Japanese Patent Publication No. 2022-172488 [Patent Document 3] Patent No. 7287562 [Patent Document 4] Japanese Patent Publication No. 2023-084597 Summary of the Invention [Problem to be solved by the invention]

[0005] When the covering material is composed of multiple part covering materials as in Patent Documents 2 to 4, it is effective in that it can be applied to existing load-bearing parts and that it is not necessary to transport to the construction site a covering structure material in which the steel members that will become the load-bearing parts are previously covered with a covering material. However, when applying a covering to an existing load-bearing part, there are cases in which it is difficult to carry out the covering work due to the physical limitations of the space and scaffolding at the construction site. The techniques of Patent Documents 1 to 4 have room for improvement in terms of ease of coating application.

[0006] An object of the present invention is to provide a covering material, a set for constructing a load-bearing part including the covering material, and a covering method, which allow for easy application of a covering to a load-bearing part at a construction site. [Means for solving the problem]

[0007] The present invention provides a covering material that covers a load support portion that extends in the vertical direction, the covering material being formed by combining a plurality of part covering materials, each of which is equipped with a temporary fixing member that can be temporarily fixed to a fixed member provided on the load support portion, and the part covering materials can be integrated together to cover the surface of the load support portion.

[0008] The present invention also provides a construction set for a covered load support, comprising the above-mentioned covering material and a load support having a support plate on which the lower end of the covering material rests.

[0009] The present invention also provides a coating method for coating an existing load support portion extending in the vertical direction with a coating material, the coating material being formed by combining a plurality of part coating materials, each of which is equipped with a temporary fixing member that can be temporarily fixed to a fixed member provided on the load support portion, and the part coating material is aligned with the load support portion, and the temporary fixing member is temporarily fixed to the fixed member. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a covering material, a set for constructing a load-bearing part including the covering material, and a covering method, which allow for easy covering of a load-bearing part at a construction site. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1(a) is a perspective view of a structural material equipped with an existing load-bearing portion and one embodiment of the covering material of the present invention, and FIG. 1(b) is a perspective view showing the upper end portion of the structural material. [Figure 2] FIG. 2 is a perspective view showing the load support portion shown in FIG. 1 in a state before being covered. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 4 is a cross-sectional view of the part covering material shown in FIG. [Figure 5] FIG. 5 is an enlarged cross-sectional view of the joint shown in FIG. [Figure 6] FIG. 6 is a perspective view of the part covering material shown in FIG. 1 as viewed from the back side. [Figure 7] FIG. 7 is a perspective view showing an embodiment of a coating method for temporarily fixing a part coating material to the load support portion shown in FIG. [Figure 8] 8 is a perspective view showing a state in which the temporary fixing member shown in FIG. 6 is temporarily fixed to the fixed member shown in FIG. [Figure 9] 9(a) and 9(b) are perspective views showing another embodiment of a fixed member and a temporary fixing member according to the present invention. [Figure 10]10(a) and 10(b) are diagrams showing another embodiment of a part covering material according to the present invention, and are perspective views showing the upper end portion of the part covering material. [Figure 11] FIG. 11 is a view showing yet another embodiment of a part covering material according to the present invention, and is a perspective view showing the upper end portion of the part covering material. [Figure 12] FIG. 12 is a top view showing the positional relationship between the load support portion and the lifting jig shown in FIGS. DETAILED DESCRIPTION OF THE INVENTION

[0012] The present invention will be described in detail below based on preferred embodiments thereof. A structural material equipped with a preferred embodiment of the covering material of the present invention is shown in Figure 1. Figure 1 shows a perspective view of the structural material. The structural material 1 of this embodiment includes a load-bearing portion 10 and a covering material 20 that covers the load-bearing portion 10.

[0013] The load-bearing portion 10 is a wooden or steel member, and is a structural member that supports a load in a building. The cross-sectional design of the load-bearing portion 10 is such that it alone is structurally safe against long-term loads (long-term loads), such as fixed loads, live loads, and snow loads. Such cross-sectional designs are well known. The lengths of the load-bearing portion 10 in the axial direction (vertical direction) and the orthogonal direction (horizontal direction) can be appropriately changed depending on the shape or size of the column, wall, etc. For example, if the load-bearing portion 10 is a steel member, square steel pipes, H-shaped steel, square steel, flat steel, channel steel, etc. can be used. The load-bearing portion 10 may also have other shapes, and any material that can be covered with the covering material 20 can be used without any particular restrictions.

[0014] The load-bearing part 10 to be covered by the covering material 20 is a structural component of a building, such as a column or wall, extending in the vertical direction Z, and is erected on a slab. It is preferable that the load-bearing part 10 is one that is already installed in the building. In this embodiment, the load-bearing part 10 is a square steel pipe with a rectangular cross section, and is an existing column A.

[0015] 1(b) and 2, the load support part 10 includes a fixed member 11 to which a temporary fixing member 30 (described later) is temporarily fixed. In the load support part 10 of this embodiment, a plurality of bolts 12, which are fixed members 11, are provided at the column capital parts of each of the four side surfaces along the axial direction. The load support part 10 includes a fixed member 11 on each of the side surfaces or portions that are covered with a part covering material 21 (described later). The fixed member 11 is provided at a position above the portion covered by the part covering material 21 in the axial direction of the load support part 10. The fixed member 11 is fixed to the column capital part of the load support part 10 by welding, adhesive, etc. This fixed member 11 is fixed to the load support part 10 in advance, before being covered by the part covering material 21.

[0016] As shown in Fig. 2, the load support portion 10 of this embodiment is equipped with a support plate 15 that protrudes outward from the surface of the load support portion 10. This load support portion 10 has multiple support plates 15 attached to the base of each of the four axial sides. This configuration improves the workability when covering the load support portion 10 with the part covering material 21, which will be described later. It also makes it possible to suppress moisture absorption from the end grain surface of the part covering material 21. From the viewpoint of further improving the workability, the support plate 15 is preferably provided at a height of 5 mm to 20 mm from the slab in the axial direction of the load support portion 10. A metal plate can be used as the support plate 15. In this case, the support plate 15 is attached by welding or the like to the column base of the load support part 10. The support plate 15 is fixed to the load support part 10 in advance, before being covered with the part covering material 21. The support plate 15 in this embodiment is a plate-like member having a length substantially equal to the overall width of the side surface of the load support portion 10, but the support plate 15 may also be shorter than the overall width of the side surface of the load support portion 10. In this case, a plurality of support plates 15 may be provided on one side surface of the load support portion 10. For example, a pair of support plates 15, 15 may be provided, one on each side in the width direction of one side surface of the load support portion 10.

[0017] The covering material 20 covers the load bearing portion 10. In this embodiment, the covering material 20 covers four side surfaces of the load bearing portion 10, which is a pillar A, along the axial direction. The covering material 20 may cover a part of the side surface of the load support portion 10 along the axial direction, or may cover a part of the surface of the load support portion 10 .

[0018] 3 is a schematic diagram showing a cross section (transverse cross section) perpendicular to the axial direction of the structural material 1. The axial directions of the covering material 20 and the part covering material 21 coincide with the axial direction of the structural material 1 and the vertical direction Z. The covering material 20 is formed by combining a plurality of part covering materials 21. The covering material 20 of this embodiment has four part covering materials 211, 212, 213, and 214, and these part covering materials 211, 212, 213, and 214 cover the outer peripheral surface of the load support portion 10. The number of part covering materials 21 provided in the covering material 20 is not particularly limited, and may be any number that can cover a part or the entire outer circumferential surface of the load support portion 10 as appropriate.

[0019] FIG. 4 shows a schematic cross section of the part covering material 21 in a direction perpendicular to the axial direction of the covering material 20. In the covering material 20, each part covering material 21 has a laminated structure in which an outer layer 25 that forms the surface of the part covering material 21 and an inner layer 26 that is located between the load support portion 10 and the outer layer 25 are laminated. In the part covering material 21, the inner layer 26 faces the outer peripheral surface of the load support portion 10, and the outer layer 25 is located outside the inner layer 26.

[0020] In the part covering material 21 of this embodiment, the inner layer 26 and the outer layer 25 are made of wood materials made of solid wood. In this specification, "pure wood" refers to wood that does not contain flame retardants, non-flammable materials, inorganic materials, etc. Examples of pure wood include laminated lumber, lumber, cross-laminated timber (CLT), laminated veneer lumber (LVL), parallel strand lumber (PSL), and plywood. CLT and laminated lumber may be formed by stacking multiple lamina with rectangular cross sections in the short direction, with the vertices of the rectangles overlapping. Examples of pure wood species that make up the outer layer 25 include cedar, fir, SPF, and balsa. Examples of pure wood species that make up the inner layer 26 include larch, Douglas fir, red pine, spruce, Japanese white birch, cypress, Japanese cypress, zelkova, Scots pine, and Radiata pine.

[0021] From the viewpoint of further improving the fire resistance of the covering material 20, it is preferable that the outer layer 25 is configured to burn and be destroyed when exposed to flames. In this case, for example, it is preferable that the part covering material 21 has the outer layer 25 made of a burnable covering layer and the inner layer 26 made of a fire-resistant covering layer. The configuration disclosed in Patent Document 1 can be applied to the laminated structure having these layers. From the same viewpoint as above, the part covering material 21 may have a burnable layer as the outer layer 25 instead of the laminated structure having the burnable covering layer and the fire-resistant covering layer. The burnable layer may be a burnable layer made of solid wood having a thickness based on a known burnable design.

[0022] The thickness of each of the outer layer 25 and the inner layer 26 is not particularly limited and can be any thickness. The thickness of the outer layer 25 can be, for example, 10 mm or more and less than 25 mm. The thickness of the inner layer 26 can be, for example, 60 mm or more and 90 mm or less.

[0023] Various known adhesives conventionally used in the manufacture of fire-resistant structural materials can be used to bond the inner layer 26 and the outer layer 25, and to bond the laminae that make up the inner layer 26 and the outer layer 25. Examples include resorcinol resin adhesives, resorcinol-phenol resin adhesives, aqueous polymer isocyanate resin adhesives, polyurethane adhesives, and vinyl acetate adhesives.

[0024] The covering material 20 is formed by disposing part covering materials 21 on the surface of the load bearing portion 10, and at least partially covering the surface of the load bearing portion 10. As shown in Fig. 3, the part covering materials 21 of this embodiment can be joined together to form an integrated body so as to cover the surface of the load bearing portion 10. As shown in Figures 3 and 4, the part covering material 21 of this embodiment has a substantially L-shape in a cross section viewed in an orthogonal direction. In this cross section, the part covering material 21 has two sides a and b that intersect at a right angle, as shown in Figure 4. The part covering material 21 shown in Figure 4 has inner joints 23 formed at the ends of one and the other sides a and b that extend in a direction away from the right-angle corner. The inner joints 23 protrude on the back side of the part covering material 21 more than on the front side. The back side of the part covering material 21 faces the load support part 10.

[0025] 4 can be joined to another part covering material 21 having an outer joint portion 22. The outer joint portion 22 has a portion on the front side of the part covering material 21 protruding more than the portion on the back side. More specifically, as shown in FIGS. 3 and 5 , each of the outer and inner joints 22, 23 has a generally L-shaped cross section in which a convex portion and a concave portion are aligned in the thickness direction of the covering material 20. Multiple part coverings 21 can be fitted together with the convex portion of the outer joint 22 butting against the concave portion of the inner joint 23, or the concave portion of the outer joint 22 butting against the convex portion of the inner joint 23. This allows multiple part coverings 21 to be integrated by joining the outer joint 22 of one part covering 21 with the inner joint 23 of another part covering 21. As shown in FIG. 5 , a joint 27 is formed by joining multiple part coverings 21 together. In the covering material 20 of this embodiment, the joint 27 is bent in a crank shape, but the shape of the joint 27 is not limited to this.

[0026] In the covering material 20 of this embodiment, the outer and inner joint portions 22, 23 of adjacent part covering materials 21 are fitted together to form a joint portion 28 where these joint portions 22, 23 face each other. That is, in the joint portion 28, the outer and inner joint portions 22, 23 face each other with a seam portion 27 interposed therebetween. As shown in Fig. 5, the coating material 20 of this embodiment has a front-side facing portion 28a that faces each other on the front side of the coating material 20 and a back-side facing portion 28b that faces each other on the back side of the front-side facing portion 28a. In a cross-sectional view of the coating material 20 in the thickness direction Y, the front-side facing portion 28a is formed by a protruding portion of the outer joint portion 22 and a corresponding recess of the inner joint portion 23, and the back-side facing portion 28b is formed by a protruding portion of the inner joint portion 23 and a corresponding recess of the outer joint portion 22. In this embodiment, the front-side facing portion 28a and the back-side facing portion 28b are offset in the joining direction. The joining direction X is the direction in which the outer joint portion 22 and the inner joint portion 23 of the joint portion 28 are aligned and is perpendicular to the thickness direction Y of the coating material 20.

[0027] As shown in Fig. 5, the multiple part covering materials 21 of this embodiment are joined and fixed to one another by fasteners 24. As a result, the multiple part covering materials 21 are fixed to the load support portion 10 in an integrated state surrounding the periphery of the load support portion 10. The part covering materials 21 of this embodiment are fixed to one another at joints 28 by multiple fasteners 24 arranged intermittently along the vertical direction. There are no particular restrictions on the spacing between the fasteners 24 in the vertical direction. The fastening device 24 may be, for example, a screw, a nail, or a staple. In this embodiment, the part coverings 21 are fastened together with screws. That is, the covering material 20 has fastening devices 24 at the joints 28 of the multiple part coverings 21, which penetrate the laminated structure of the outer layer 25 and the inner layer 26. Using these fastening devices 24 improves the efficiency of the workability during covering application. The fastening devices 24 are driven through dowel holes in the thickness direction Y of the covering material 20, penetrating the outer joints 22 and reaching a portion of the inner joints 23. That is, the fastening devices 24 extend from the outer layer 25 to at least a portion of the inner layer 26 in the thickness direction. In the covering material 20 of this embodiment, the dowel holes into which the fastening devices 24 are driven are blocked by wooden dowels 24a.

[0028] Each part covering material 21 is equipped with a temporary fixing member 30 that can be temporarily fixed to a fixed member 11 provided on the load support portion 10. As shown in FIG. 6 , the temporary fixing member 30 in this embodiment is a rectangular plate 31 that is provided on the back side of the part covering material 21 with the longitudinal direction of the plate 31 aligned with the vertical direction Z. This plate 31 has a bolt hole 33 at its upper end through which a bolt 12, which is the fixed member 11, can be inserted, and a fixing portion 32 at its lower end that is fixed to the back side of the part covering material 21. In this embodiment, the bolt hole 33 of the plate 31 is an opening that does not reach the periphery of the plate 31. This is preferable because it further stabilizes the temporary fixing state described below.

[0029] At the fixing portion 32, the plate 31 is fastened to the part covering material 21 by fasteners (not shown) such as the screws described above. The plate 31 is provided at the upper end of the part covering material 21 so that the bolt holes 33 are positioned above the upper end of the part covering material 21 in the vertical direction Z. Furthermore, in the part covering material 21 of this embodiment, when the positions of the corners of the approximately L-shaped part covering material 21 and the corners of the load supporting portion 10 are aligned in the circumferential direction of the load supporting portion 10, the position of the plate 31 corresponds to the position of the bolts 12 of the load supporting portion 10.

[0030] 7 shows a method of covering a load-bearing portion 10 using the covering material 20 of this embodiment. Note that the temporary fixing member 30 and the member to be fixed 11 are not shown in FIG. As shown in Fig. 7, the part covering material 21 of this embodiment is rotated around its lower end as a fulcrum to be in an upright position. That is, by erecting the part covering material 21, the axial directions of the load support portion 10 and the part covering material 21 are made parallel to each other, and the part covering material 21 is aligned along the load support portion 10. In the embodiment shown in Fig. 7, the erection is performed manually.

[0031] It is preferable to previously fix a support plate 15 that supports the lower end of the part covering material 21 to the load support section 10. In this case, after the lower end of the part covering material 21 is placed on the support plate 15, the part covering material 21 can be rotated around the lower end as a fulcrum, making it easier to erect the part covering material 21.

[0032] 8, bolts 12, which are members to be fixed 11, are inserted into bolt holes 33 of plate 31, which are temporary fixing members 30, and the bolts 12 are tightened with nuts, thereby temporarily fixing the plate 31 to the bolts 12. At this time, the corners of the erected, approximately L-shaped part covering material 21 are aligned with the corners of the load support portion 10, and the inner layer 26 is opposed to the load support portion 10, and the part covering material 21 is temporarily fixed along the surface of the load support portion 10.

[0033] In this embodiment, a generally L-shaped, upright part covering material 21 is placed at each of the four corners of the load support portion 10 and temporarily fixed. When temporarily fixing multiple part covering materials 21, adjacent part covering materials 21 are joined together at joints 28 to form a single unit. Once the temporary fixing of the part covering materials 21 to the desired outer peripheral surface of the load support portion 10 is complete, the position of the part covering materials 21 is finely adjusted, and the part covering materials 21 are then fixed to each other at the joints 28. The fasteners 24 described above are used for such fixing. In this way, the surface of the load support portion 10 is covered with multiple part covering materials 21.

[0034] The covering material 20 of this embodiment has multiple part covering materials 21 that can be combined with each other, which reduces the weight of the covering material as a whole, facilitating transport to the covering construction site and coating the load support portion 10. Furthermore, each part covering material 21 is equipped with a temporary fixing member 30 that can be temporarily fixed to the fixed member 11 fixed to the load support portion 10, which facilitates the work of combining the part covering materials 21 and the work of coating the surface of the load support portion 10. Therefore, the covering material 20 of this embodiment can easily be used to cover the load support portion 10 at the construction site.

[0035] It is preferable that the temporary fixing member 30 can be temporarily fixed by shifting its position in the horizontal or vertical direction relative to the fixed member 11. With such a configuration, a clearance can be provided in the horizontal or vertical direction relative to the fixed member 11, making temporary fixing easier without having to precisely adjust the position of the temporary fixing member 30. In addition, the position of the part covering material 21 relative to the load support portion 10 can be easily adjusted. 6 has an oval shape extending horizontally, and therefore can be shifted horizontally relative to the bolt 12. Furthermore, the length of the bolt hole 33 shown in FIG. 6 in the vertical direction Z is slightly longer than the outer diameter of the bolt 12. This allows the bolt hole 33 to be shifted in the vertical direction Z relative to the bolt 12. An L-shaped insertion jig 35 shown in Fig. 9, which will be described later, has an insertion portion 36 extending in the vertical direction Z, and therefore can be displaced in the vertical direction Z relative to the inserted portion 13. The overall width of the inserted portion 13 shown in Fig. 9 is greater than the overall width of the insertion portion 36. This allows the L-shaped insertion jig 35 to be displaced in the width direction (horizontal direction) relative to the inserted portion 13. In this way, if the position of the temporary fixing member 30 can be adjusted both horizontally and vertically relative to the fixed member 11, temporary fixing can be performed more easily.

[0036] The covering material 20 of this embodiment is formed by joining part covering materials 21 together. The joining structure is not particularly limited, and may be a known joint such as a two-piece joint, a dovetail joint, a tenon joint, or a half-tongue joint. The shape of the part covering material 21 or the shapes of the joints 22, 23 are appropriately set depending on the type of joint.

[0037] As shown in FIG. 3, in the covering material 20 of this embodiment, the approximately L-shaped corners of the part covering material 21 are arranged at the corners of the load support portion 10, which has a square cross-sectional shape, and the seam portions 27 are located outside the corners of the covering material 20, but the seam portions 27 may also be located at the corners of the load support portion 10.

[0038] The covering material 20 may cover the load support portion 10 with a spacer disposed between the covering material 20 and the load support portion 10. For example, if the load support portion 10 is an H-shaped steel, disposing a spacer on the web portion can facilitate the attachment work of the part covering material 21 around the load support portion 10. Wood plywood such as cedar can be used as the spacer. The spacer and the load support portion 10 can be joined together by known joining means such as epoxy resin adhesive or staples.

[0039] Another embodiment of the present invention will be described with reference to Figures 9 to 12. For configurations of this embodiment of the present invention that are not specifically described, the description of the above-described embodiment will be applied as appropriate.

[0040] FIG. 9 shows another embodiment of the temporary fixing member 30 and the fixed member 11. The temporary fixing member 30 shown in Figure 9(a) is an L-shaped insertion jig 35 having a fixing portion 37 fixed to the top surface of the part covering material 21 and an insertion portion 36 hanging down from the fixing portion 37. The L-shaped insertion jig 35 has an L shape formed by bending a single plate at a right angle, and the fixing portion 37 and the insertion portion 36 are connected at a right angle. The fixing portion 37 is fixed to the part covering material 21 along the horizontal direction, and the insertion portion 36 is fixed along the vertical direction. The insertion portion 36 is disposed at a position separated from the back surface of the part covering material 21 and faces the back surface.

[0041] 9(a) is an inserted portion 13 having a U-shaped cross section and an insertion opening penetrating in the vertical direction Z between the load support portion 10 and the member 11. An L-shaped insertion jig 35 has an insertion portion 36 that can be inserted into the inserted portion 13.

[0042] When temporarily fixing part covering material 21 using L-shaped insertion jig 35 of this embodiment, part covering material 21 is lifted so that the lower end of inserting portion 36 is positioned higher than the upper end of inserted portion 13, and inserting portion 36 into the insertion opening of inserted portion 13. Part covering material 21 can be easily lifted by inserting a crowbar or the like into the lower end and using the principle of leverage.

[0043] The L-shaped insertion jig 35 may have a configuration shown in Fig. 9(b). The L-shaped insertion jig 35 shown in Fig. 9(b) has a fixing portion 37 that is fixed to the back surface of the part covering material 21 and an L-shaped insertion portion 36 connected to the fixing portion 37. This L-shaped insertion jig 35 is formed by bending a single plate into a U-shape, and the fixing portion 37 and the L-shaped insertion portion 36 are connected at a right angle. The fixing portion 37 extends vertically, and the insertion portion 36 has an upper end portion that extends horizontally and a portion that extends vertically.

[0044] FIG. 10 shows another embodiment of the part covering material 21. 10(a) and 10(b) includes a lifting jig 40 for lifting the part covering material. The lifting jig 40 is a metal hanger onto which a hanger wire can be attached, and is provided at the upper end of the part covering material 21. The lifting jig 40 shown in Figures 10(a) and (b) has a fixed part 42 that faces the part covering material 21 and is attached to the part covering material 21, and a hanging support part 43 that is connected perpendicularly to the fixed part 42. The lifting jig 40 shown in FIG. 10(a) is composed of an angle bar 41a formed by bending a single plate into an L-shape. A fixing portion 42, which is fixed to the surface side of the upper end of the part covering material 21, and a hanging receiving portion 43 form a right angle. A hanging receiving hole 44 through which a hanging wire is inserted are formed in the hanging receiving portion 43. In the part covering material 21 of this embodiment, the inner layer 26 protrudes above the outer layer 25, and two angle bars 41a are fixed to the protruding portion 26a of the inner layer 26. The two angle bars 41a are fixed with fasteners such as screws, and are arranged so that the hanging receiving portions 43 face each other toward the corners of the part covering material 21. After covering the load support portion 10 with the covering material 20, the fasteners such as screws are removed from the angle bar 41a, and the angle bar 41a is removed from the part covering material 21. An angle bar 41b used as the lifting jig 40 may have a fixed portion 42 and a hanging receiving portion 43 connected in a T-shape, as shown in FIG. 10(b).

[0045] The lifting jig 40 shown in FIG. 11 is composed of flat washer members 45 and is fixed to the top surface of the part covering material 21. In this embodiment, two washer members 45 are arranged on the top surface of the part covering material 21 so that a corner is sandwiched between them. The washer member 45 has a central hole 46 through which a lifting wire is inserted and multiple holes (not shown) formed circumferentially around the central hole, and is fixed to the top surface of the part covering material 21 by fastening screws or the like into the multiple holes. After covering the load support portion 10 with the covering material 20, the washer member 45 may be removed from the part covering material 21 by removing the fasteners such as screws, or it may be buried by disposing a separate panel or the like.

[0046] When covering a load support portion 10 using part covering material 21 equipped with lifting jig 40, part covering material 21 can be suspended along the load support portion 10 and temporarily fixed. As a result, even if the load support portion 10 faces scaffolding 18 and erection from the scaffolding is difficult, as shown in FIG. 12 , the suspended part covering material 21 can be moved from between the scaffolding 18 and the main body and placed on the load support portion 10, and temporary fixing can also be easily performed. For the lifting, a known lifting device such as a crane or winch can be used.

[0047] Furthermore, when the load support portion 10 is a column A, a beam B may be provided at the column capital as shown in Fig. 12. From the viewpoint of further suppressing interference with the beam B and more easily temporarily fixing the part covering material 21 to the load support portion 10, it is preferable that the lifting jig 40 be provided at a location on the part covering material 21 that corresponds to the protruding corner of the load support portion 10.

[0048] Although the preferred embodiment of the present invention has been described above, the present invention is not limited to such an embodiment and can be modified as appropriate. For example, although the temporary fixing member 30 in the above-described embodiment is provided at the upper end of the part covering material 21, it may be provided at a location other than the upper end, corresponding to the position of the fixed member 11 fixed to the load support part 10. For example, it may be provided at the center position of the part covering material 21 in the axial direction. Furthermore, although the part covering material 21 in the above-described embodiment has either the outer joint portion 22 or the inner joint portion 23, it may have both the outer joint portion 22 and the inner joint portion 23. For example, if the part covering material 21 has a substantially L-shape in a cross section viewed in the orthogonal direction, it may have the inner joint portion 23 at the end of one side portion a extending in a direction away from the right-angle corner, and the outer joint portion 22 at the end of the other side portion b extending in a direction away from the right-angle corner. The present invention also includes a construction set for the coated load support 10, which includes the above-mentioned coating material 20 and a load support 10 having a support plate 15 on which the lower end of the coating material 20 rests. [Explanation of symbols]

[0049] 1 Structural materials 10 Load support part 11 Fixed member 12 volts 13 Insertion part 15 Support Plate 18 Scaffolding 20 Covering material 21 Parts coating material 22 Outer joint 23 Inner joint 24 Fasteners 24a Filler Dowel Material 25 Outer layer 26 Inner layer 27 Seam 28 Joint 28a Front side opposing part 28b Back side facing part 30 Temporary fixing member 31 Plate 32 Fixed part 33 Bolt holes 35 L-shaped insertion jig 36 Insertion part 37 Fixed part 40 Lifting jig 41a, 41b angle iron 42 Fixed part 43 Hanging part 44 Hanging hole 45 Washer material 46 Central hole Y: thickness direction of coating material Z vertical direction

Claims

1. A covering material that covers a load support portion extending in the vertical direction, the covering material is formed by combining a plurality of part covering materials, each of the part covering materials including a temporary fixing member that can be temporarily fixed to a fixed member provided on the load support portion; A coating material that can be integrated with the part coating materials to cover the surface of the load-bearing portion.

2. The covering material according to claim 1 , wherein the temporary fixing member can be temporarily fixed to the fixed member while being shifted in position in the horizontal direction or the vertical direction relative to the fixed member.

3. The covering material according to claim 1 or 2, wherein the temporary fixing member is a plate having a bolt hole formed therein through which a bolt, which is the fixed member, can be inserted.

4. The covering material according to claim 1 or 2, wherein the temporary fixing member is an L-shaped insertion jig that can be inserted into the insertion portion that is the fixed member.

5. The part coating material according to claim 1 or 2, further comprising a lifting jig for lifting the part coating material.

6. 3. A construction set for a covered load support, comprising the covering material according to claim 1 or 2 and a load support having a support plate on which a lower end of the covering material is placed.

7. A covering method for covering an existing vertically extending load-bearing portion with a covering material, comprising: the covering material is formed by combining a plurality of part covering materials, each of the part covering materials including a temporary fixing member that can be temporarily fixed to a fixed member provided on the load support portion; the part covering material is placed along the load support portion, and the temporary fixing member is temporarily fixed to the fixed member.

8. The coating method according to claim 7 , wherein the part coating material is placed along the load-bearing portion by erecting or hanging.

9. 9. The coating method according to claim 7, wherein a support plate for supporting a lower end of the part coating material is fixed to the load support portion in advance, and after the lower end of the part coating material is placed on the support plate, the part coating material is aligned along the load support portion.

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