Band-like wood material wrapped body

Abstract

To suppress damage to a finishing material covering a band-like wood material wrapped around a core material.SOLUTION: A band-like wood material wrapped body 10 comprises a core material 20, a band-like wood material 30 wrapped around the core material 20, a base material 40 wrapped around the core material 20 over the band-like wood material 30, and a finishing material 50 covering the base material 40.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a band-shaped wood material wound body. [Background technology]

[0002] BACKGROUND ART A fire-resistant covering structure for a concrete member is known in which a strip-shaped wood covering material is spirally wrapped around the concrete member (see, for example, Patent Document 1).

[0003] Furthermore, a reinforcement structure for a concrete member is known in which steel reinforcing members are wrapped around a concrete member at multiple locations spaced apart in the longitudinal direction (see, for example, Patent Document 2).

[0004] Furthermore, a fire-resistant coating method for steel frames is known in which a sheet-like fire-resistant coating material is spirally wrapped around the steel frame (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-016044 [Patent Document 2] Japanese Patent Application Publication No. 2017-031774 [Patent Document 3] Japanese Patent Application Publication No. 62-211437 Summary of the Invention [Problem to be solved by the invention]

[0006] From the viewpoint of design and the like, it is conceivable to cover the strip-shaped wood material wrapped around a core material such as a pillar with a finishing material.

[0007] However, the thickness and length of the wood strips vary due to drying shrinkage, etc. Therefore, when the wood strips are covered with a finishing material, cracks and the like may occur in the finishing material.

[0008] SUMMARY OF THE INVENTION In consideration of the above, the present invention aims to prevent damage to a finishing material that covers a strip of wood material wrapped around a core material. [Means for solving the problem]

[0009] The strip-shaped wood material wound body described in claim 1 comprises a core material, a strip-shaped wood material wound around the core material, a base material wound around the core material from above the strip-shaped wood material, and a finishing material covering the base material.

[0010] According to the belt-shaped wood wound body of claim 1, the belt-shaped wood is wound around a core material. The core material is then wrapped around the belt-shaped wood with a base material. The base material is then covered with a finishing material.

[0011] By placing a base material between the wood strip and the finishing material in this way, the finishing material is prevented from adapting to changes in thickness and length of the wood strip due to drying shrinkage, etc., and therefore damage to the finishing material is prevented.

[0012] The strip-shaped wood material wound body according to claim 2 is the strip-shaped wood material wound body according to claim 1, in which the base material is formed in a strip shape and is spirally wound around the core material from above the strip-shaped wood material.

[0013] According to the belt-shaped wood material wound body of claim 2, the base material is formed in a belt shape and is spirally wound around the core material from above the belt-shaped wood material.

[0014] This makes it easier to wrap the base material around the core material from above the strip of wood. Furthermore, by spirally wrapping the base material around the core material from above the strip of wood, the base material can be attached to the strip of wood by partially fixing both ends of the base material to the strip of wood with a tacker or adhesive, without having to fully adhere the base material to the strip of wood. This improves the ease of application of the base material.

[0015] A band-shaped wood material wound body according to a third aspect of the present invention is the band-shaped wood material wound body according to the first or second aspect of the present invention, wherein the base material is made of paper, nonwoven fabric, or cloth.

[0016] According to the third aspect of the present invention, the base material is made of paper, nonwoven fabric, or cloth, which makes it easier to apply the base material and finishing material to an existing wood strip-wound body, for example, in which the wood strip is wound around a core material. [Effects of the Invention]

[0017] As described above, according to the present invention, damage to the finishing material covering the strip-shaped wood material wrapped around the core material can be suppressed. [Brief explanation of the drawings]

[0018] [Figure 1] 1A is a cross-sectional view taken along line 1A-1A in FIG. 1B, and FIG. 1B is a side view (elevation) showing a band-shaped wood material wound body according to one embodiment. [Figure 2] 2(B) is a side view (elevation) showing the construction process of the band-shaped wood material wound body shown in FIG. 1(B). [Figure 3] 3A is a cross-sectional view taken along line 3A-3A in FIG. 3B, and FIG. 3B is a side view (elevation) showing the construction process of the wood strip-wrapped body shown in FIG. 1B. [Figure 4] FIG. 2 is a cross-sectional view corresponding to FIG. 1(A) showing a modified example of a band-shaped wood material wound body according to one embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment will be described with reference to the drawings.

[0020] 1(A) and 1(B) show a band-shaped wood material wound body 10 according to this embodiment. As an example, the band-shaped wood material wound body 10 is used as a pillar of a structure. This band-shaped wood material wound body 10 comprises a core material 20, a band-shaped wood material 30, a base material 40, and a finishing material 50. Note that a beam or the like may be joined to the band-shaped wood material wound body 10.

[0021] (Core material) The core material 20 extends in the axial direction of the belt-shaped wood material wound body 10 and has a circular cross-sectional shape. As an example, the core material 20 is made of cylindrical concrete and is arranged with its longitudinal direction (axial direction) as the up-down direction.

[0022] The core material 20 is, for example, a structural member that supports the load of a structure. In other words, the core material 20 is formed to be able to support the load (long-term load and short-term load) borne by the belt-shaped wood material wound body 10.

[0023] The core material 20 may be made of, for example, ordinary concrete or high-strength concrete. Furthermore, the core material 20 is not limited to a structural member that supports the load of a structure, but may also be a secondary member or a non-structural member.

[0024] (Wood strips) The wood strip 30 is made of a strip of wood veneer and is wrapped around the outer periphery of the core material 20 to form a cylindrical shape. When wrapped around the concrete core material 20, the wood strip 30 functions as a fire-resistant covering material that suppresses temperature rise and spalling of the core material 20 in the event of a fire.

[0025] The wood strips 30 are made of, for example, laminated veneer lumber (LVL), with the grain direction being the width direction. The wood strips 30 are sewn together with threads that run substantially perpendicular to the grain direction, i.e., along the longitudinal direction. For example, the wood strips 30 are spirally wrapped around the outer periphery of the core material 20, and both ends are fixed to the core material 20 with adhesive or a tacker (not shown).

[0026] The wood strip 30 is wound in multiple layers (three layers in this embodiment) around the outer periphery of the core material 20. The wood strip 30 is stacked on the outer periphery of the core material 20 so that the winding directions of the multiple layers are staggered. As a result, when viewed in the thickness direction of the wood strip 30, the fiber directions of the wood strips 30 constituting adjacent layers cross, increasing the strength of the wood strip 30.

[0027] The wood strip 30 may be laminated in multiple layers around the outer periphery of the core material 20 so that the winding direction is the same. The wood strip 30 is not limited to multiple layers, and may be wound in a single layer around the outer periphery of the core material 20. Furthermore, the wood strip 30 is not limited to being wound in a spiral shape, and may be wound around the outer periphery of the core material 20 in the circumferential direction of the core material 20.

[0028] Furthermore, the wood strip 30 is not limited to LVL, but may be made of other wood materials such as laminated lumber or plywood. The wood strip 30 may be fixed to the entire outer surface of the core material 20 with an adhesive or the like.

[0029] (Base material) The base material (strip-shaped base material) 40 is, for example, formed as a strip-shaped sheet material, and is formed into a cylindrical shape by being wrapped around the outer periphery of the core material 20 from above the strip-shaped wood material 30. This base material 40 functions as a base for the finishing material 50, which will be described later. Furthermore, the base material 40 is, for example, interposed between the strip-shaped wood material 30 and the finishing material 50, which will be described later, and functions as a buffer material that suppresses the finishing material 50 from responding to drying shrinkage, etc., of the strip-shaped wood material 30.

[0030] The base material 40 is made of, for example, paper, nonwoven fabric, or cloth. For example, the base material 40 is spirally wrapped around the outer periphery of the wood strip 30, and both ends are fixed to the wood strip 30 and the core material 20 with an adhesive or a tacker (not shown). The base material 40 is wrapped around the outer periphery of the wood strip 30 while fastening it.

[0031] The base material 40 is wrapped in a single layer around the outer periphery of the strip-shaped wood material 30. The base material 40 is wrapped around the outer periphery of the strip-shaped wood material 30 so that the wrapping direction is opposite to that of the surface layer strip-shaped wood material 30. The base material 40 may also be wrapped around the outer periphery of the strip-shaped wood material 30 so that the wrapping direction is the same as that of the surface layer strip-shaped wood material 30.

[0032] Furthermore, the base material 40 is not limited to being wrapped in a single layer, but may be wrapped in multiple layers around the outer circumferential surface of the wood strip 30. In this case, the base material 40 may be layered in multiple layers on the outer circumferential surface of the wood strip 30 so that the wrapping directions are staggered, or may be layered on the outer circumferential surface of the wood strip 30 so that the wrapping directions are the same. Furthermore, the base material 40 is not limited to being wrapped in a spiral shape, but may be wrapped around the outer circumferential surface of the wood strip 30 along the circumferential direction of the wood strip 30.

[0033] The base material 40 is not limited to a strip shape and may be formed in a large size, for example. The base material 40 may be fixed (bonded) to the entire outer surface of the strip-shaped wood material 30 with an adhesive or the like.

[0034] (Finishing materials) As an example, the finishing material 50 is formed as a strip-shaped sheet material, and is formed into a cylindrical shape by being wrapped around the outer periphery of the core material 20 from above the base material 40 and the strip-shaped wood material 30. This finishing material 50 covers the base material 40, and forms, for example, the design surface of the strip-shaped wood material wound body 10.

[0035] The finishing material 50 is formed from, for example, wood, paper, nonwoven fabric, cloth, resin sheet, etc. The finishing material 50 is wrapped around the outer peripheral surface of the base material 40 in the circumferential direction, and is fixed (bonded) to the outer peripheral surface of the base material 40 with an adhesive or the like. The finishing material 50 is not limited to being strip-shaped, and may be formed into, for example, a large size.

[0036] (action) Next, the operation of this embodiment will be described.

[0037] According to this embodiment, the strip-shaped wood material 30 is wrapped around the outer peripheral surface of the core material 20. In addition, the base material 40 is wrapped around the outer peripheral surface of the core material 20 from above the strip-shaped wood material 30. The outer peripheral surface of this base material 40 is covered with the finishing material 50.

[0038] By interposing the base material 40 between the wood strip 30 and the finishing material 50 in this way, the finishing material 50 is prevented from adapting to variations in thickness and length of the wood strip 30 due to drying shrinkage, etc. Therefore, damage to the finishing material 50 is prevented.

[0039] The base material 40 is formed in a strip shape and is spirally wound around the core material 20 from above the strip-shaped wood material 30. This makes it easier to wind the base material 40 around the core material 20 from above the strip-shaped wood material 30.

[0040] Furthermore, by spirally winding the base material 40 onto the core material 20 from above the wood strip 30, it is possible to attach the base material 40 to the wood strip 30 by partially fixing both ends of the base material 40 to the wood strip 30 with a tacker, adhesive, etc., without having to fully adhere the base material 40 to the wood strip 30. This improves the workability of the base material 40.

[0041] The base material 40 is made of paper, nonwoven fabric, or cloth, which makes it easier to apply the base material 40 and the finishing material 50 to an existing wood strip-wound body 10 in which an existing wood strip 30 is wrapped around a core material 20, while preventing damage to the finishing material 50.

[0042] (Variation) Next, a modification of the above embodiment will be described.

[0043] In the above embodiment, the core material 20 is made of concrete. However, the core material 20 is not limited to concrete and may be made of, for example, wood.

[0044] For example, in the wood strip-wound body 60 shown in Fig. 4, the core material 70 is formed of a cylindrical wood material. Also, as an example, a fire-resistant structure is applied to the wood strip-wound body 60. Specifically, the wood strip-wound body 60 has the core material 70, a fire-retardant layer 72, the wood strip 30, a base material 40, and a finishing material 50.

[0045] (Core material) The core material 70 extends in the axial direction of the belt-shaped wood material wound body 60 and has a circular cross-sectional shape. The core material 70 is formed from a cylindrical wood material and is arranged with its longitudinal direction (axial direction) as the up-down direction. The core material 70 is formed from, for example, CLT (Cross Laminated Timber), LVL, or laminated timber.

[0046] The core material 70 is, for example, a structural member (load-bearing portion) that supports the load of the structure. In other words, the core material 70 is formed to be able to support the load (long-term load and short-term load) borne by the belt-shaped wood material wound body 60.

[0047] (fire-stop layer) A fire-retardant layer 72 is provided on the outside of the core material 70, covering the outer peripheral surface of the core material 70. The fire-retardant layer 72 is a layer that stops the combustion of the wood strip 30 in the event of a fire (spontaneous extinguishing) and suppresses the combustion of the core material 70. The fire-retardant layer 72 is arranged along the outer periphery of the core material 70, covering the entire outer peripheral surface of the core material 70.

[0048] The fire-retardant layer 72 is a high-heat-capacity layer (heat capacity type) that has a larger heat capacity than the core material 70. The fire-retardant layer 72 is formed, for example, by hardening mortar, grout, or concrete, and has a larger heat capacity than the core material 70 and the band-shaped wood material 30.

[0049] (Wood strips) Outside the fire-retardant layer 72, a wooden strip-shaped wood material 30 is provided to cover the outer peripheral surface of the fire-retardant layer 72. The strip-shaped wood material 30 burns in the event of a fire and forms a charred layer (thermal insulating layer), thereby functioning as a substitute burn layer that suppresses the penetration of fire heat into the core material 70.

[0050] The wood strip 30 is formed from a strip of wood veneer, and is cylindrically shaped by being wrapped around the outer periphery of the core material 70 from above the fire-retardant layer 72. The wood strip 30 covers the entire outer periphery of the fire-retardant layer 72. In addition, as one example, the wood strip 30 is spirally wrapped around the outer periphery of the core material 20, and both ends are fixed to the core material 20 with adhesive or a tacker (not shown).

[0051] The thickness (layer thickness) of the strip-shaped wood material 30 is set appropriately depending on the required fire resistance performance (fire resistance time) of the strip-shaped wood material wound body 60, the burning rate of the strip-shaped wood material 30, and the heat-shielding performance.

[0052] (Base material) As an example, the base material (strip-shaped base material) 40 is formed as a strip-shaped sheet material, and is formed into a cylindrical shape by being wrapped around the outer surface of the core material 20 from above the strip-shaped wood material 30 and the fire-retardant layer 72.

[0053] (Finishing materials) As an example, the finishing material 50 is formed as a strip-shaped sheet material, and is formed into a cylindrical shape by being wrapped around the outer periphery of the core material 20 from above the base material 40, the strip-shaped wood material 30, and the fire-retardant layer 72. This finishing material 50 covers the base material 40, and forms, for example, the design surface of the strip-shaped wood material wound body 60.

[0054] In this way, the core material 70 may be made of wood. In order to ensure the fire resistance of the core material 70 made of wood, the core material 70 may be covered with a fire-retardant layer 72, or the strip-shaped wood material 30 may function as a substitute fire layer.

[0055] The core member in the above embodiment is not limited to a cylindrical shape, and may be formed into, for example, a cylindrical shape, a rectangular column shape, a square tube shape, etc. The core member may be formed of, for example, a steel pipe such as a round steel pipe or a square steel pipe, or a plastic pipe such as a PVC pipe.

[0056] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modified examples may be used in appropriate combination, and it goes without saying that the present invention can be implemented in various forms as long as it does not deviate from the gist of the present invention. [Explanation of symbols]

[0057] 10. Strip-shaped wooden material wrapping body 20 Core material 30 Strip wood material 40 Undercoat 50 Finishing Materials 60 Strip-shaped wooden material wrapping body 70 Core material

Claims

1. A core material and A strip-shaped wood material wrapped around the core material; a base material that is wrapped around the core material from above the strip-shaped wood material; a finishing material that covers the base material; A strip-shaped wood material wound body comprising:

2. The base material is formed in a strip shape and is spirally wound around the core material from above the strip-shaped wood material. The belt-shaped wood material wound body according to claim 1.

3. The base material is formed of paper, nonwoven fabric, or cloth.

3. The belt-shaped wood material wound body according to claim 1 or 2.

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