JP7653224B2 - Synthetic flooring - Google Patents

Description

The present invention relates to synthetic floors.

The following Patent Document 1 describes a method of constructing a slab that integrates concrete with a casting formwork used when pouring the concrete. Adjacent casting formworks are placed with their end faces in close contact with each other. The casting formwork is formed by alternating layers of reinforcing fibers such as glass fiber and carbon fiber and cement mortar so that it does not deform due to the pressure of pouring the concrete.

JP 2008-285961 A

When high-strength materials are used as the casting formwork, such as the material described in Patent Document 1, deformation due to the pouring pressure of concrete can be suppressed. On the other hand, when materials with lower strength per unit volume compared to these materials, such as wood materials, are used as the casting formwork, adjacent casting formwork may bend separately and their ends may shift vertically, damaging the aesthetic appearance.

Taking the above facts into consideration, the present invention aims to make the misalignment between the ends of adjacent boards less noticeable in a composite floor formed by integrating boards made of wood materials with a concrete slab.

The synthetic floor of claim 1 comprises a plurality of boards formed using wood material, concrete slabs placed on adjacent boards and integrated with the boards, rails arranged along the end faces between the longitudinal end faces of the adjacent boards without their upper surfaces protruding from the concrete slab , and connecting members fixed to the rails and the boards and embedded in the concrete slab, connecting the adjacent boards to each other.

In the composite floor of claim 1, rod-shaped members are placed between the ends of the planks formed using wood materials. These rod-shaped members are placed along the ends of the planks. In addition, connecting members that connect adjacent planks to each other are fixed to the tops of the rod-shaped members.

In other words, adjacent plate materials are connected by connecting members with the rod-shaped member sandwiched between them. As a result, even if the plate materials are bent due to the weight of the concrete slab, the misalignment of the ends is less noticeable compared to when adjacent plate materials are directly connected to each other.
The synthetic floor of claim 2 comprises a plurality of boards formed using wood material, a concrete slab provided on adjacent boards and integrated with the boards, a rail arranged along the end faces of the adjacent boards and between the end faces, and a connecting member fixed to the rail and the boards and embedded in the concrete slab, connecting the adjacent boards, the central portion of the connecting member being fixed to the upper surface of the rail using a bolt and both ends being fixed to the adjacent boards to connect the boards.

A synthetic floor according to a third aspect of the present invention is the synthetic floor according to the first or second aspect, in which a hanging device is attached to the rail .

In the composite floor of claim 3 , a suspender is attached to the rod-shaped member. This allows equipment, piping, ceiling materials, etc. to be suspended from the composite floor. This simplifies the structure below the composite floor compared to a structure in which a separate member is provided for attaching the suspender. This makes it easy to install and less likely to impair the aesthetic appearance.

A synthetic floor according to a fourth aspect of the present invention is the synthetic floor according to the third aspect, wherein the rail is formed in a rail shape along which the hanging tool can slide.

In the synthetic floor according to claim 4 , the hanging tool can be slid while attached to the rod-shaped member, which increases the degree of freedom in the layout of the items hung by the hanging tool.
The composite floor of claim 5 is a composite floor described in any one of claims 1 to 4, wherein the rail comprises a main body and a flange formed at the lower end of the main body, protruding horizontally away from the main body, and having an end folded upward, and a gap is formed between the folded-back portion of the flange and the main body.

According to the present invention, in a composite floor formed by integrating boards made of wood materials with a concrete slab, the misalignment between the ends of adjacent boards can be made less noticeable.

FIG. 1 is a cross-sectional view showing a synthetic floor according to an embodiment of the present invention. FIG. 2 is a partially enlarged cross-sectional view showing a detailed configuration of a synthetic floor according to an embodiment of the present invention. FIG. 11 is a cross-sectional view showing a modified example of the rail in the synthetic floor according to the embodiment of the present invention. FIG. 1 is a cross-sectional view showing a modified example in which the boards in a synthetic floor according to an embodiment of the present invention are formed using wood material and precast concrete. FIG. 11 is a cross-sectional view showing another modified example of a synthetic floor according to an embodiment of the present invention, in which the boards are formed using wood material and precast concrete.

The synthetic floor according to the embodiment of the present invention will be described below with reference to the drawings. Components indicated with the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and may be present in multiples. Also, explanations of configurations and reference numerals that are duplicated in each drawing may be omitted. Note that the present invention is not limited to the following embodiment, and may be implemented with appropriate modifications, such as omitting configurations or replacing them with different configurations, within the scope of the purpose of the present invention.

<Synthetic floor>
As shown in Fig. 1, a composite floor 20 according to an embodiment of the present invention is a slab in which a concrete slab 30 and a wooden floor board 40 are integrally formed. The composite floor 20 is placed inside a building and spanned across beams (e.g., beams 12 and 14) supported by columns (not shown).

The beams across which the composite floor 20 is spanned can be H-shaped steel beams 12 shown on the left side of FIG. 1, wooden beams 14 shown on the right side of FIG. 1, or reinforced concrete beams (not shown), and the type of structure is not particularly limited. In this embodiment, a case where the composite floor 20 is spanned across beams 12 and 14 will be described.

In this specification, the left-right direction on the paper in FIG. 1 is referred to as the X direction, and the front-back direction on the paper is referred to as the Y direction. The X direction and the Y direction are directions that are approximately perpendicular to each other. In FIG. 2 described later, the left-right direction on the paper coincides with the Y direction, and the front-back direction on the paper coincides with the X direction.

(Concrete slab)
The concrete slab 30 forming the composite floor 20 is formed by embedding slab reinforcement 32 in concrete 34. The slab reinforcement 32 is formed with top reinforcement 32A, bottom reinforcement 32B, and lattice reinforcement 32C. The lattice reinforcement 32C is formed in a wave shape with amplitude in the vertical direction, and connects the top reinforcement 32A and the bottom reinforcement 32B.

The slab reinforcement 32 is manufactured, for example, in a factory by welding the lattice reinforcement 32C to the top reinforcement 32A and bottom reinforcement 32B, and is then transported to the building construction site. In this embodiment, the slab reinforcement 32 is placed on the beams 12, 14 via separators S1, S2.

The multiple bottom reinforcements 32B can be connected together using connecting reinforcements 32D. This allows the slab reinforcement 32 to be placed across the surface of the concrete slab 30.

The concrete 34 is poured using the wooden floorboards 40 described below as a form (a throwaway form). By pouring the concrete 34 while the wooden floorboards 40 are supported by shoring (not shown), a composite floor is formed in which the concrete slab 30 and the wooden floorboards 40 are integrated.

If the wooden floorboards 40 are fixed to the slab reinforcement 32, the concrete 34 can be poured without the need for shoring. Also, the wooden floorboards 40 can be spanned across the beams 12 and 14, eliminating the need for shoring. These construction methods can be selected as appropriate.

(Wood flooring)
As shown in FIG. 2 , the wooden floor board 40 is formed to include a board material 42 , a rail 44 , and a connecting member 46 .

The boards 42 are made of CLT (Cross Laminated Timber). In addition to CLT, boards 42 may be made of LVL (Laminated Veneer Lumber), laminated timber, plywood, solid wood, etc. A plurality of boards 42 are arranged in the Y direction, and rails 44 are arranged between each board 42.

The rail 44 is an example of a rod-shaped member in the present invention, and is disposed along the ends of the plate materials 42 between the ends of the plate materials 42 that are adjacent to each other in the Y direction. The rail 44 is disposed along the end faces of the plate materials 42 that are adjacent to each other in the X direction, while contacting the end faces.

In this embodiment, the end face of the plate material 42 along the X direction is an end face along the longitudinal direction of the plate material 42, but the end face of the plate material 42 along the X direction may be an end face along the short direction of the plate material 42.

The rail 44 is formed by combining steel channel members 44A and 44B whose upper flanges (when assembled to the wooden floor board 40) are longer than the lower flanges. The upper flanges of the channels 44A and 44B are welded together to form the rail 44, which has an engagement groove 44C between the lower flanges.

The width of the engagement groove 44C can be adjusted by adjusting the overlap width of the upper flanges of the channel members 44A and 44B. In other words, a variety of shapes can be obtained using the same parts.

It is preferable that the channel members 44A and 44B are formed so that the bending stiffness of the rail 44 in the longitudinal direction is greater than the bending stiffness of the plate member 42 in the longitudinal direction. This makes it possible to suppress deflection of the plate member 42.

A through hole is formed in the upper portion of the rail 44, i.e., in each of the upper flanges of the channel members 44A and 44B. The shank of the bolt B1 passes through this through hole, and the threaded portion of the shank protrudes above the rail 44. The bolt head of the bolt B1 is welded to the channel member 44B.

The thickness of the rail 44 is approximately the same as the thickness of the plate material 42. The longitudinal dimension of the rail 44 can be set as appropriate. When multiple rails 44 are arranged in the longitudinal direction (X direction), the end faces of the rails 44 may be butted against each other, or may be spaced apart.

The rail 44 does not necessarily have to be a combination of two channel members 44A and 44B. For example, the rail material may be a lip channel steel with an engagement groove formed therein, or an aluminum extrusion. By using such prefabricated members, the amount of work required to process the rail can be reduced.

A connecting member 46 is fixed to the top of the rail 44. The connecting member 46 is made of a steel angle bar, and a through hole is formed in the center of the piece of the connecting member 46 that faces the rail 44. The connecting member 46 is fixed to the rail 44 by inserting the above-mentioned bolt B1 into this through hole and screwing a nut onto the bolt B1.

In addition, through holes are formed at both ends of the piece of the connecting member 46 that faces the rail 44. These through holes are for inserting the shafts of the screws T1. With the plate material 42 placed on both sides of the rail 44, the connecting member 46 and the plate material 42 are fixed by driving the screws T1. This connects the rail 44 and the plate material 42 via the connecting member 46.

The other piece of the connecting member 46 is positioned to protrude upward. The bottom reinforcement 32B of the slab reinforcement 32 is placed on this piece. When fixing the wooden floorboard 40 to the slab reinforcement 32 as described above, the connecting member 46 and the bottom reinforcement 32B are fixed to each other. The connecting member 46 and the bottom reinforcement 32B can be fixed to each other by welding them to each other or by fastening them to each other using fastening bars (not shown).

<Suspension structure>
A bolt B2 serving as a suspender is attached to the rail 44. The bolt B2 has a bolt head diameter larger than the groove width of the engagement groove 44C in the rail 44. This makes it difficult for the bolt B2 to fall off the rail 44.

It is preferable to attach the bolt B2 to the rail 44 before the wooden floor board 40 is integrated with the concrete slab 30. Because the diameter of the bolt head is larger than the groove width of the engagement groove 44C, it may be difficult to attach the bolt B2 to the rail 44 after the wooden floor board 40 is integrated with the concrete slab 30.

However, if the longitudinal dimension of the rail 44 is made shorter than the longitudinal dimension of the plate material 42, the bolt B2 can be attached to the rail 44 at any time. In this case, the bolt B2 is inserted from below into the portion where the rail 44 is not located (the gap between the plate materials 42), and then slid laterally (in the X direction) to position the bolt head inside the rail 44. This allows the bolt B2 to engage with the engagement groove 44C.

Alternatively, when multiple rails 44 are arranged in the longitudinal direction, the end faces of the rails 44 can be spaced apart from each other to allow the bolt B2 to engage with the engagement groove 44C in a similar manner.

Bolt B2 can slide along the longitudinal direction (X direction) of rail 44 while engaged with engagement groove 44C. In addition, bolt B2 can be fixed to rail 44 by screwing a nut onto bolt B2. In other words, bolt B2 can be fixed at any position in the X direction.

In FIG. 2, bolt B2 is shown to be long enough to screw in a nut, but the length of bolt B2 is arbitrary. If bolt B2 is made long, it can be used to easily suspend ducts, ceiling materials, lighting fixtures, etc.

As shown in FIG. 2, rail 50 can be fixed to rail 44 via bolt B2 and a nut. The shape of rail 50 is arbitrary, but for example, rail 44 has a shape in which bolt B1 is omitted. Bolt B3 can also be slidably attached to rail 50.

It is preferable that the rail 50 is fixed to multiple rails 44. This allows the rail 50 to be supported at two or more points.

<Action and Effects>
In the composite floor 20 according to the embodiment of the present invention, as shown in Fig. 2, rails 44 serving as rod-shaped members are disposed between the ends of planks 42 made of a wooden material (CLT). The rails 44 are disposed along the ends of the planks 42. Also, connecting members 46 are fixed to the upper portions of the rails 44, connecting adjacent planks 42 to each other.

In other words, adjacent plate materials 42 are connected to each other by connecting members 46 with rails 44 sandwiched between them. As a result, even if the plate materials 42 are bent due to the weight of the concrete slab 30, the misalignment of the ends is less noticeable compared to when adjacent plate materials 42 are directly connected to each other.

In addition, by making the bending stiffness of the rail 44 in the longitudinal direction greater than the bending stiffness of the plate material 42 in the longitudinal direction, it is possible to reduce the deflection of the plate material 42 due to the weight of the concrete slab 30.

This makes it possible to make the misalignment between the ends of adjacent plate materials 42 even less noticeable. In addition, because the deflection of the plate materials 42 is reduced, it is possible to suppress the leakage of sludge from between the plate materials 42.

In addition, in the synthetic floor 20 according to the embodiment of the present invention, a bolt B2 is attached to the rail 44 as a hanging device. This allows equipment, piping, ceiling materials, etc. to be suspended from the synthetic floor 20. This simplifies the structure below the synthetic floor 20 compared to a structure in which separate members are provided for attaching the hanging device. This makes it easy to install and less likely to impair the aesthetic appearance.

In addition, since equipment and the like can be suspended from the rails 44, there is no need to perform processes such as drilling holes in the plate material 42 in order to suspend equipment and the like from the plate material 42. This makes it possible to suppress cross-sectional loss of the composite floor 20. This makes it possible to suppress a decrease in the structural performance of the composite floor 20. It also makes it possible to suppress the leakage of slag from the perforated parts.

In addition, the bolt B2 can be slid laterally while attached to the rail 44. This allows for greater freedom in the layout of the items suspended by the bolt B2.

Furthermore, in the synthetic floor 20 according to the embodiment of the present invention, the rail 50 is fixed to the rail 44 by the bolt B2. This rail 50 extends in a direction that intersects with the rail 44. The "intersecting direction" includes any direction, including a direction that is approximately perpendicular to the rail 44.

As a result, the sliding direction of bolt B2 is limited to the X direction, but bolt B3 can be fixed at any position on a plane. In other words, by using bolt B2, rail 50, and bolt B3 together, the degree of freedom in the layout of items can be further increased.

In addition, in the composite floor 20 according to the embodiment of the present invention, the connecting member 46 is formed using an angle bar. One side of the connecting member is fixed to the board material 42, and the other side protrudes upward. This allows shear forces to be transmitted between the concrete slab 30 and the wooden floor board 40. In other words, the connecting member 46 acts as a shear key, increasing the shear resistance of the composite floor 20.

In addition, cables and other wiring can be passed inside the rails 44, 50. This allows cables to be wired without being exposed, even if no ceiling material is installed below the synthetic floor 20.

In addition, it is not necessary to attach the bolts B2, B3 or alternative hanging devices to the rails 44, 50. For example, by using duct rails or the like for the rails 44, 50, lighting fixtures and the like can be hung directly. Furthermore, it is not necessary to use the rails 50, and they may be omitted.

<Other embodiments>
As shown in Fig. 3, a rail with flanges 52A protruding on both sides may be used as the rod-shaped member in the present invention. The flanges 52A are formed at the lower end of the rail 52 by protruding in a direction away from the rail 52 (X direction) and then folding back upward. An end of the plate material 42 is placed on the flanges 52A. This allows the plate material 42 to be sandwiched and fixed between the flanges 52A and the connecting member 46.

Furthermore, by forming the flange 52A, a gap V1 can be secured between the end face of the plate material 42 and the rail 52. By adjusting the width of this gap, construction errors in the plate material 42 can be absorbed.

Furthermore, a gap V2 is formed where the flange 52A is folded upward. This gap V2 serves as a pool for the sludge of fresh concrete, preventing the sludge from leaking out from between the plates 42.

Both ends of the plate material 42 do not necessarily need to be fixed to the rails (rails 44, 52). For example, one end of the plate material 42 may be placed on the beam 16. In this case, the end of the rail 50 can be supported using a support material 54 or the like to prevent the rail 50 from vibrating.

In addition, in this embodiment, the board 42 is formed using only wood material, but the embodiment of the present invention is not limited to this. For example, a board 62 made of wood material and a concrete plate 64 may be integrated together, as in the board 60 shown in FIG. 4.

As with plate 42, various wood materials can be used for plate 62. Concrete plate 64 is a precast concrete plate and is formed integrally with plate 42 in a factory.

From the viewpoint of weight reduction, it is preferable to provide a hollow portion 64A (void) in the longitudinal direction of the concrete plate 64. Also, from the viewpoint of ensuring a long span, it is preferable to apply prestress to the concrete plate 64 using PC steel bars (not shown).

By using a board 60 that integrates a wooden board 62 and a concrete board 64 in this way, the volume of the concrete 34 poured on site can be reduced, reducing on-site work.

In addition, a concrete plate 66 shown in FIG. 5 may be used instead of the concrete plate 64. The concrete plate 66 has ribs 66A along the longitudinal direction (X direction) formed at a predetermined interval in the Y direction. By placing foam material 66B or the like between adjacent ribs 66A, the amount of concrete 34 poured can be reduced.

As described above, the board material in the present invention may be made of only wood material (e.g., board 42) or a combination of wood material and concrete (e.g., board 62). In addition, the concrete to be combined with the wood material may be various types of precast concrete (e.g., concrete boards 64, 66).

Furthermore, in this embodiment, rails such as rails 44 and 52 are used as the rod-shaped members, but the embodiment of the present invention is not limited to this. For example, the rod-shaped member may be a member having a female thread for screwing in a bolt. In this case, it is preferable that the female thread is formed at a predetermined interval in the longitudinal direction of the rod-shaped member. In this way, the present invention can be embodied in various forms.

20 synthetic floor 30 concrete slab 42 plate material 44 rail (rod-shaped member)
46 Connecting member 52 Rail (rod-shaped member)
60 Plate B2 Bolt (hanging device)

Claims (5)

A plurality of boards formed using a wood material;
a concrete slab provided on each of the adjacent plate members and integrated with the plate members;
A rail is disposed between end faces of the adjacent plate members along the longitudinal direction thereof, the end faces being such that the upper surfaces of the rails do not protrude from the concrete slab ;
a connecting member that is fixed to the rail and the plate material, embedded in the concrete slab, and connects adjacent plate materials;
Composite flooring with. A plurality of boards formed using a wood material;
a concrete slab provided on each of the adjacent plate members and integrated with the plate members;
a rail disposed between and along end faces of the adjacent plate members;
a connecting member that is fixed to the rail and the plate material, embedded in the concrete slab, and connects adjacent plate materials;
Equipped with
The connecting member has a center portion fixed to the upper surface of the rail using a bolt, and both ends fixed to the adjacent plate materials, respectively, to connect the plate materials.
Synthetic floor. A hanger is attached to the rail.
3. The synthetic floor according to claim 1 or 2. The rail is formed in a shape that allows the hanging tool to slide.
The synthetic floor of claim 3. The rail is
A main body portion,
a flange formed at a lower end of the main body, protruding in a direction away from the main body in a horizontal direction, and having an end folded back upward;
A gap is formed between the folded portion of the flange and the main body.
The synthetic floor according to any one of claims 1 to 4.