Extension structure of sheet material, extension structure body, membrane ceiling structure, and construction method of extension structure

Abstract

To provide an extension structure of a sheet material capable of mounting the sheet material to a frame surface of a frame in a more uniformly extended state.SOLUTION: In an extension structure of a sheet material 3 where a margin part 3a of the sheet material 3 bent along a frame 2 is attached to the frame 2 in a state in which the sheet material 3 is extended to a frame surface of the frame-like frame 2, a plate-shaped reinforcement material 4 stuck to the margin part 3a is provided, the frame 2 has an outside wall 24 forming its outside surface, and the reinforcement material 4 is stuck to the outside wall 24 in a state of being positioned between the margin part 3a and the outside wall 24.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a sheet material extension structure, an extension structural body, a membrane ceiling structure, and a construction method for an extension structure. [Background technology]

[0002] In response to numerous reports of damage caused by ceiling panels of suspended ceilings falling due to major earthquakes, a membrane ceiling structure using a lightweight and flexible sheet material has been proposed as a measure to prevent ceiling panels from falling (for example, see Patent Document 1 below).

[0003] Such a membrane ceiling structure includes a stretched structure in which a sheet material is stretched over the frame surface of a rectangular frame, for example, and attached to the frame. The membrane ceiling structure is constructed by arranging the stretched structures suspended from the ceiling of a building via hanging fixtures on the ceiling surface. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6468809 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional tensioned structures described above, the sheet material is attached to the frame using fasteners such as screws, which can cause wrinkles in the screwed-in parts of the sheet material, resulting in distortions such as wavy or twisted sheets being stretched over the frame surface.

[0006] In addition, since the sheet material is more flexible than the ceiling board, it is difficult to stretch it evenly when attaching it to the frame surface, which is one of the factors that reduces the workability during construction. In particular, when a mirror-like sheet is used as the sheet material, distortion of the sheet material is easily noticeable, so it is even more important to stretch the sheet material evenly during construction.

[0007] The present invention has been proposed in consideration of the above-mentioned conventional circumstances, and aims to provide an extension structure for sheet material that enables the sheet material to be attached to the frame surface of a frame in a more uniformly extended state, as well as an extension structure having such an extension structure, as well as a membrane ceiling structure in which such an extension structure is laid on the ceiling surface, and a construction method for such an extension structure that is suitable for constructing such an extension structure. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides the following means. [1] A sheet material stretching structure in which a sheet material is stretched over a frame surface of a frame-shaped frame, and a marginal portion of the sheet material folded along the frame is attached to the frame, A plate-shaped reinforcing material is attached to the marginal portion, The frame has an outer wall that defines an outer surface thereof; A tensioned structure of sheet material, characterized in that the reinforcing material is attached to the outer wall in a state where it is positioned between the margin and the outer wall. [2] The sheet material extension structure described in [1], wherein the outer wall is inclined toward the inside of the frame surface. [3] The frame has a front wall forming a front surface thereof and a rib wall protruding from the outer wall toward the front of the front wall, The sheet material stretched structure described in [1] is characterized in that the marginal portion is folded at the tip of the rib wall while the sheet material is not in contact with the front wall. [4] The frame has a rear wall forming a rear surface thereof, The sheet material extension structure described in [1] above, characterized in that the marginal portion is attached to the rear side wall. [5] A cover material is provided that is attached to the rear side of the frame, the cover material has a first wall portion located on a side facing the outer wall, a second wall portion located on a side facing the rear wall, a first abutment portion protruding from a surface of the first wall portion facing the outer wall, a second abutment portion protruding from a surface of the second wall portion facing the rear wall, and a fixing portion that fixes the second wall portion to the rear wall, The stretched structure of the sheet material described in [4] is characterized in that when the cover material is attached to the frame, the first abutment portion and the second abutment portion each abut against the margin portion. [6] The sheet material extension structure described in [1], characterized in that the sheet material is made of a mirror-like sheet. [7] An extension structure having an extension structure of the sheet material described in any one of [1] to [6]. [8] A membrane ceiling structure in which the expansion structure described in [7] is laid on the ceiling surface. [9] A construction method for a stretched structure, in which a sheet material is stretched over a frame surface of a frame, and a marginal portion of the sheet material folded along the frame is attached to the frame, A step of attaching a plate-shaped reinforcing material to the marginal portion; a step of folding the marginal portion together with the reinforcing material along an outer wall that forms an outer surface of the frame while the sheet material is stretched against a frame surface of the frame; A construction method for a tension structure, comprising the steps of: attaching the reinforcing material to the outer wall with the reinforcing material positioned between the margin and the outer wall. Effect of the Invention

[0009] As described above, according to the present invention, there is provided a sheet material extension structure that enables the sheet material to be attached to the frame surface of a frame in a more uniformly extended state, as well as an extension structure having such an extension structure, as well as a membrane ceiling structure in which such an extension structure is laid on the ceiling surface, and as well as a construction method for an extension structure that is suitable for constructing such an extension structure. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a plan view showing a membrane ceiling structure using an extension structure according to one embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view showing the membrane ceiling structure taken along line AA shown in FIG. 1. [Diagram 3] 2 is a cross-sectional view showing a stretched structure of the sheet material taken along line BB shown in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. As one embodiment of the present invention, a membrane ceiling structure 100 using an extension structure 1 shown in, for example, Figs. 1 to 3 will be described.

[0012] Fig. 1 is a plan view showing a membrane ceiling structure 100 using the extension structure 1. Fig. 2 is a cross-sectional view showing the membrane ceiling structure 100 along the line segment AA shown in Fig. 1. Fig. 3 is a cross-sectional view showing the extension structure of the sheet material 3 along the line segment BB shown in Fig. 1.

[0013] (Membrane ceiling structure) As shown in Figures 1 and 2, the membrane ceiling structure 100 of this embodiment comprises multiple extension structures 1 suspended from the ceiling of a building via hanging brackets 200, and is constructed by laying these multiple extension structures 1 in a line on the ceiling surface.

[0014] (expanded structure) The tensioned structure 1 comprises a rectangular frame 2, a sheet material 3 attached in a stretched state to the frame surface (front) of the frame 2, a reinforcing material 4 attached to a margin 3a of the sheet material 3 which is folded along the frame 2, and a cover material 5 attached to the rear side of the frame 2.

[0015] The frame 2 is surrounded on all four sides by a pair of vertical frames 2a on the left and right and a pair of horizontal frames 2b on the top and bottom to form a frame surface, and is configured such that the vertical frames 2a are connected in the middle by a middle frame 2c and assembled together.

[0016] The tension structure 1 is supported in a suspended state via four hanging brackets 200 bolted to the vertical frames 2a located at the four corners of the frame 2.

[0017] The frame materials of the vertical frame 2a, horizontal frame 2b, and middle frame 2c that make up the frame 2 are each made of a hollow extrusion material. That is, these frame materials are formed into a long, hollow shape by extruding a metal material such as aluminum or an aluminum alloy into a long shape and then cutting it to a predetermined length.

[0018] As shown in Figure 3, the vertical frame 2a and the horizontal frame 2b have a front wall 21 that forms the front side of the frame 2, a rear wall 22 that forms the back side of the frame 2, an inner wall 23 that forms the inner surface of the frame 2, an outer wall 24 that forms the outer surface of the frame 2, and a rib wall 25 that protrudes from the outer wall 24 forward further than the front wall 21.

[0019] Although FIG. 3 illustrates the configuration on the vertical frame 2a side, the horizontal frame 2b side has the same configuration as the vertical frame 2a, and therefore is not illustrated.

[0020] The front wall 21 forms a plane (front surface) parallel to the frame surface of the frame 2.

[0021] The rear wall 22 has a wall portion 22a that forms a plane (back surface) parallel to the front wall 21 from the outer wall 24 side, a first groove portion 22b into which a cap material (not shown) for fixing the cover material 5 is fitted, and a second groove portion 22c that engages the bolt 201 of the hanging bracket 200.

[0022] The first groove portion 22b is formed by recessing the central portion of the rear side wall 22 to match the shape of the cap material, and is provided extending in the longitudinal direction of the vertical frame 2a and the horizontal frame 2b.

[0023] The cap materials are fitted inside the first groove portions 22b of the vertical frames 2a and horizontal frames 2b, and are arranged in a line at predetermined intervals in the longitudinal direction of the vertical frames 2a and horizontal frames 2b.

[0024] The second groove portion 22c is located on the inner wall 23 side of the rear side wall 22 and is provided extending in the longitudinal direction of the vertical frame 2a and the horizontal frame 2b. The second groove portion 22c has a recess 22d recessed to correspond to the head of the bolt 201 and a slit 22e opened to correspond to the shaft portion of the bolt 201, and the width of the slit 22e is narrower than the width of the recess 22d.

[0025] The inner wall 23 forms a plane (inner surface) perpendicular to the front wall 21 .

[0026] The outer wall 24 constitutes an inclined surface (outer surface) that is inclined toward the inside of the frame surface of the frame 2.

[0027] The rib wall 25 forms an inclined surface that is continuous with the outer wall 24 and is provided so as to protrude obliquely forward beyond the front wall 21 .

[0028] The middle frame 2c is for reinforcing the frame 2, and is made of a square pipe having a generally rectangular cross section.

[0029] The sheet material 3 is made of a non-flammable mirror-like sheet having a mirror-like film attached to one side (front side) of a glass cloth, for example. The sheet material 3 has a rectangular shape larger than the frame surface of the frame 2, and a margin 3a protruding from the frame surface of the frame 2 is provided so as to surround the periphery of the frame 2.

[0030] The reinforcing material 4 is made of a metal plate such as steel or aluminum, or a synthetic resin (plastic) plate such as polyvinyl chloride resin, ABS resin, polyamide resin, polyester resin, polyethylene resin, or polypropylene resin, or a fiber-reinforced plastic (FRP) plate such as GFRP or CFRP that combines these synthetic resin materials with reinforcing fiber materials such as glass fiber or carbon fiber, and is formed in a long, flat plate shape corresponding to the margin 3a of the sheet material 3.

[0031] The reinforcing material 4 is attached to the marginal portion 3a to ensure (reinforce) the rigidity of the marginal portion 3a, and has a thickness greater than that of the sheet material 3.

[0032] The cover material 5 is formed by extruding a synthetic resin (plastic) material such as polyvinyl chloride resin, ABS resin, polyamide resin, polyester resin, polyethylene resin, or polypropylene resin into a long length and then cutting it to a predetermined length. The cover material 5 is attached to the rear side of the vertical frame 2a and the horizontal frame 2b. The material may be metal or FRP, like the reinforcing material 4.

[0033] The cover material 5 has a first wall portion 51 located on the side opposite the outer wall 24, a second wall portion 52 located on the side opposite the rear wall 22, a first abutment portion 53 protruding from the surface of the first wall portion 51 opposite the outer wall 24, a second abutment portion 54 protruding from the surface of the second wall portion 52 opposite the rear wall 22, and a fixing portion 55 that fixes the second wall portion 52 to the rear wall 22.

[0034] The first wall portion 51 is formed in a long flat plate shape so as to be perpendicular to the front wall 21 .

[0035] The second wall portion 52 is formed in a long flat plate shape so as to be perpendicular to the first wall portion 51 and parallel to the wall portion 22 a of the rear wall 22 .

[0036] The first contact portion 53 protrudes in a long flat plate shape from the middle of the surface of the first wall portion 51 facing the outer wall 24 , and its tip is bent in a direction along the inclined surface of the outer wall 24 .

[0037] The second contact portion 54 is provided in the shape of a long flat plate protruding from the middle of the surface of the second wall portion 52 facing the wall portion 22a.

[0038] The fixing portion 55 protrudes in a long flat plate shape from the surface of the second wall portion 52 facing the first groove portion 22b, and has a pair of locking claws 55a protruding from both sides of the tip thereof.

[0039] The cover material 5 is attached to the rear side of the vertical frame 2a and the horizontal frame 2b by fixing the fixing part 55 to the cap material fitted in the first groove part 22b. Specifically, the pair of locking claws 55a are locked to the cap material while the fixing part 55 is inserted inside the cap material.

[0040] This allows the fixing portion 55 to be fixed to the cap material fitted into the first groove portion 22b, and makes it possible to attach the cover material 5 to the rear side of the vertical frame 2a and the horizontal frame 2b.

[0041] The structure for attaching the cover material 5 to the frame 2 is not necessarily limited to the structure using the cap material described above, and can be changed as appropriate.

[0042] (Stretched sheet structure) The extension structure 1 of this embodiment has an extension structure of the sheet material 3 in which the sheet material 3 is extended over the frame surface of the frame 2 and the margin portion 3a of the sheet material 3 folded along the frame 2 is attached to the frame 2 (vertical frame 2a and horizontal frame 2b).

[0043] Specifically, the extension structure of this embodiment has a structure in which the reinforcing material 4 is positioned between the margin 3a of the sheet material 3 and the outer wall 24 of the frame 2 (vertical frame 2a and horizontal frame 2b), as shown in Figure 3, and the reinforcing material 4 is affixed to the outer wall 24.

[0044] Additionally, the marginal portion 3a is bent at the tip of the rib wall 25 without being in contact with the front wall 21 of the frame 2 (the vertical frame 2a and the horizontal frame 2b).

[0045] In this case, the sheet material 3 stretched over the frame surface of the frame 2 is in contact only with the tips of the rib walls 25. This makes it possible to prevent the shape of the front wall 21 from being transferred to the sheet material 3 on the frame surface (front face) of the frame 2, thereby improving the appearance of the stretched structure 1.

[0046] In the extension structure of this embodiment, the margin 3a is folded along the inclined surfaces of the outer wall 24 and the rib wall 25 together with the reinforcing material 4 so that the tip of the rib wall 25 and the end of the reinforcing material 4 coincide with each other. The reinforcing material 4 is also affixed to the inclined surfaces of the outer wall 24 and the rib wall 25. Furthermore, the margin 3a is affixed to the wall portion 22a of the rear side wall 22.

[0047] In addition, in the extended structure of this embodiment, when the cover material 5 is attached to the frame 2, the first abutment portion 53 abuts against the margin portion 3a facing the outer wall 24, and the second abutment portion 54 abuts against the margin portion 3a facing the wall portion 22a (rear wall 22).

[0048] (Construction method of expansion structure) The construction method of the extended structure of this embodiment includes the steps of attaching a reinforcing material 4 to the margin 3a of the above-mentioned sheet material 3, folding the margin 3a together with the reinforcing material 4 along the outer wall 24 of the frame 2 (vertical frame 2a and horizontal frame 2b) while the sheet material 3 is extended against the frame surface of the frame 2, and attaching the reinforcing material 4 to the outer wall 24 while the reinforcing material 4 is positioned between the margin 3a and the outer wall 24.

[0049] The method of attaching the reinforcing material 4 to the marginal portion 3a is not particularly limited, but may be, for example, a pressure sensitive adhesive sheet such as double-sided tape, adhesive, etc. In this embodiment, double-sided tape is used.

[0050] The method of attaching the reinforcing material 4 to the inclined surfaces of the outer wall 24 and the rib wall 25 is not particularly limited, but for example, a pressure sensitive adhesive sheet such as double-sided tape or an adhesive can be used. In this embodiment, double-sided tape is used.

[0051] The method of attaching the margin 3a to the wall 22a (rear wall 22) is not particularly limited, but may be, for example, a pressure sensitive adhesive sheet such as double-sided tape, adhesive, etc. In this embodiment, adhesive is used.

[0052] In addition, the blank portions 3a located at the corners of the frame 2 do not need to be cut, but can be folded and overlapped with the blank portions 3a on the vertical frame 2a or horizontal frame 2b side and attached.

[0053] In the construction method of the extended structure of this embodiment, after the sheet material 3 is extended over the frame surface of the frame 2 described above, it is possible to easily fold the marginal portion 3a, whose rigidity is ensured (reinforced) by the reinforcing material 4, uniformly along the outer wall 24 of the frame 2 (vertical frame 2a and horizontal frame 2b).

[0054] Furthermore, in the construction method of the tension structure of this embodiment, the reinforcing material 4 attached to the marginal portion 3 a can be attached evenly to the inclined surfaces of the outer wall 24 and the rib wall 25 .

[0055] As a result, in the extension structure of this embodiment, it is possible to prevent distortion such as waviness or creases in the sheet material 3 extended over the frame surface of the frame 2, compared to conventional cases in which the sheet material is attached to the frame using fasteners such as screws.

[0056] Furthermore, by folding the reinforcing material 4 attached to the margin portion 3a along the inclined surfaces of the outer wall 24 and the rib wall 25, the tension applied to the sheet material 3 makes it possible to attach the sheet material 3 in a more uniformly stretched state against the frame surface of the frame 2.

[0057] In particular, when the above-mentioned non-flammable mirror-like sheet is used as the sheet material 3, distortion of the sheet material 3 is easily noticeable, and since the sheet material 3 has no stretchability, it becomes even more important to uniformly stretch the sheet material 3 during installation.

[0058] In contrast, in the extension structure of this embodiment, the sheet material 3 is uniformly extended, making it possible to achieve a beautiful mirror finish.

[0059] In addition, in the extended structure of this embodiment, when the cover material 5 is attached to the above-mentioned frame 2, the first abutment portion 53 abuts against the margin portion 3a facing the outer wall 24, and the second abutment portion 54 abuts against the margin portion 3a facing the wall portion 22a (rear wall 22).

[0060] As a result, the first contact portion 53 and the second contact portion 54 press the marginal portion 3a, so that it is possible to prevent the marginal portion 3a and the reinforcing material 4 from peeling off.

[0061] As described above, in the extension structure 1 having the extension structure of this embodiment, it is possible to attach the sheet material 3 to the frame surface of the frame 2 in a more uniformly extended state.

[0062] Therefore, in a membrane ceiling structure 100 in which such an extension structure 1 is laid on the ceiling surface, it is possible to improve the appearance of the extension structure 1 and enhance its design.

[0063] The present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0064] For example, in the above embodiment, a non-flammable mirror-like sheet is exemplified as the sheet material 3, but the material of the sheet material 3 is not particularly limited, and the present invention can be widely applied to the stretched structure of a sheet material that is attached in a stretched state to the frame surface of a frame-shaped frame.

[0065] In addition, the above embodiment illustrates an example in which the extension structure 1 is applied to a membrane ceiling structure 100, but the use of the extension structure 1 is not particularly limited, and for example, the extension structure 1 can be laid on the wall surface of a building, etc. [Explanation of symbols]

[0066] Reference Signs List 1... Extension structure 2... Frame 3... Sheet material 3a... Margin 4... Reinforcement material 5... Cover material 100... Membrane ceiling structure

Claims

1. A sheet material stretching structure in which a sheet material is stretched over a frame surface of a frame, and a marginal portion of the sheet material folded along the frame is attached to the frame, A plate-shaped reinforcing material is attached to the marginal portion, The frame has an outer wall that defines an outer surface thereof; A tensioned structure of sheet material, characterized in that the reinforcing material is attached to the outer wall in a state where it is positioned between the margin and the outer wall.

2. 2. The sheet material extension structure according to claim 1, wherein the outer wall is inclined toward the inside of the frame surface.

3. The frame has a front wall that forms a front surface of the frame, and a rib wall that protrudes from the outer wall forward beyond the front wall, 2. The sheet material extension structure according to claim 1, wherein the marginal portion is folded at the tip of the rib wall while the sheet material is not in contact with the front side wall.

4. The frame has a rear wall that forms a rear surface thereof, 2. The sheet material extension structure according to claim 1, wherein the margin is attached to the rear side wall.

5. A cover material is attached to a rear side of the frame, the cover material has a first wall portion located on a side facing the outer wall, a second wall portion located on a side facing the rear wall, a first abutment portion protruding from a surface of the first wall portion facing the outer wall, a second abutment portion protruding from a surface of the second wall portion facing the rear wall, and a fixing portion that fixes the second wall portion to the rear wall, 5. The sheet material extension structure according to claim 4, wherein the first contact portion and the second contact portion each contact the marginal portion when the cover material is attached to the frame.

6. 2. The sheet material extension structure according to claim 1, wherein the sheet material is a mirror-like sheet.

7. A tensioned structure comprising the tensioned structure of the sheet material according to any one of claims 1 to 6.

8. A membrane ceiling structure in which the expansion structure according to claim 7 is laid on a ceiling surface.

9. A construction method for a stretched structure, in which a sheet material is stretched over a frame surface of a frame, and a marginal portion of the sheet material folded along the frame is attached to the frame, A step of attaching a plate-shaped reinforcing material to the marginal portion; a step of folding the marginal portion together with the reinforcing material along an outer wall that forms an outer surface of the frame while the sheet material is stretched against a frame surface of the frame; A construction method for a tension structure, comprising the steps of: attaching the reinforcing material to the outer wall with the reinforcing material positioned between the margin and the outer wall.

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