JP2021161802A - Composite floor - Google Patents

Abstract

To make the displacement between the ends of plates adjacent to each other inconspicuous in a synthetic floor formed by integrating the plates made of wood-based material and a concrete slab.SOLUTION: A synthetic floor 20 comprises a plurality of plates 42 formed using wood-based materials, a concrete slab 30 provided on the plates 42 adjacent to each other and integrated with the plates 42, a rod-shaped member (rail 44) arranged between end portions of the plates 42 adjacent to each other along the end portions, and a connecting member 46 that is fixed to the upper portion of the rod-shaped member, embedded in the concrete slab 30, and connects the plates 42 adjacent to each other.SELECTED DRAWING: Figure 2

Description

The present invention relates to a synthetic floor.

Patent Document 1 below describes a method for constructing a slab that integrates concrete and a driving form used when placing concrete. The driving molds that are adjacent to each other are arranged so that their end faces are in close contact with each other. Further, the driving form is formed by alternately laminating reinforcing fibers such as glass fiber and carbon fiber and cement mortar so as not to be deformed by the placing pressure of concrete.

Japanese Unexamined Patent Publication No. 2008-285961

If a material having high strength such as the material described in Patent Document 1 is used as the driving formwork, deformation due to the placing pressure of concrete can be suppressed. On the other hand, when a material having a smaller strength per unit volume than these materials, for example, a wood material, is used as the driving formwork, the driving formwork adjacent to each other bends separately and the ends are bent in the vertical direction. It may be misaligned and spoil the aesthetics.

In consideration of the above facts, an object of the present invention is to make the deviation between the ends of adjacent plate materials inconspicuous in a synthetic floor formed by integrating a plate material made of wood-based material and a concrete slab. do.

The synthetic floor of claim 1 is provided on a plurality of plate materials formed of a wood material, a concrete slab provided on the plate materials adjacent to each other and integrated with the plate materials, and an end portion of the plate materials adjacent to each other. It includes a rod-shaped member arranged along the end portion between the rod-shaped members, and a connecting member fixed to the upper portion of the rod-shaped member, embedded in the concrete slab, and connecting the plate members adjacent to each other.

In the synthetic floor of claim 1, rod-shaped members are arranged between the ends of the plate material formed of wood-based material. This rod-shaped member is arranged along the end portion of the plate material. Further, a connecting member for connecting adjacent plate members is fixed to the upper portion of the rod-shaped member.

That is, the plate members adjacent to each other are connected by the connecting member with the rod-shaped member sandwiched between them. As a result, even when the plate materials are bent due to the weight of the concrete slab, the deviation between the end portions is less noticeable as compared with the case where the plate materials adjacent to each other are directly connected to each other.

The synthetic floor of claim 2 is the synthetic floor of claim 1, and a hanging tool is attached to the rod-shaped member.

In the synthetic floor of claim 2, a hanging tool is attached to the rod-shaped member. As a result, equipment, pipes, ceiling materials, etc. can be hung from the synthetic floor. Therefore, the configuration below the synthetic floor can be simplified as compared with the configuration in which a member for attaching the hanging tool is separately provided. Therefore, the workability is high and the aesthetic appearance is not easily spoiled.

The synthetic floor of claim 3 is the synthetic floor of claim 2, and the rod-shaped member is formed in the shape of a rail on which the hanger can slide.

In the synthetic floor of claim 3, the hanging tool can be slid in a state of being attached to the rod-shaped member. As a result, the degree of freedom in the layout of the article suspended by the hanging tool can be increased.

According to the present invention, in a synthetic floor formed by integrating a plate material made of wood-based material and a concrete slab, the deviation between the ends of the plate materials adjacent to each other can be made inconspicuous.

It is sectional drawing which shows the synthetic floor which concerns on embodiment of this invention. It is a partially enlarged sectional view which shows the detailed structure of the synthetic floor which concerns on embodiment of this invention. It is sectional drawing which shows the modification of the rail in the synthetic floor which concerns on embodiment of this invention. It is sectional drawing which shows the modification which formed the plate material in the synthetic floor which concerns on embodiment of this invention by using the wood material and precast concrete. It is sectional drawing which shows another modification which formed the plate material in the synthetic floor which concerns on embodiment of this invention by using a wood material and precast concrete.

Hereinafter, the synthetic floor according to the embodiment of the present invention will be described with reference to the drawings. The components shown by using the same reference numerals in each drawing mean that they are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and a plurality of each component may exist. In addition, description of overlapping configurations and symbols in the drawings may be omitted. The present invention is not limited to the following embodiments, and can be carried out with appropriate modifications such as omitting the configuration or replacing it with a different configuration within the scope of the object of the present invention.

<Synthetic floor>
As shown in FIG. 1, the synthetic floor 20 according to the 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 bridged inside a building by beams (for example, beams 12 and 14) supported by columns (not shown).

As the beam for bridging the composite floor 20, an H-shaped steel beam 12 shown on the left side of the paper surface, a wooden beam 14 shown on the right side of the paper surface, a reinforced concrete beam (not shown), or the like can be used, and the structural type is particularly selected. Not limited. In the present embodiment, a case where the composite floor 20 is bridged between the beam 12 and the beam 14 will be described.

In this specification, the left-right direction of the paper surface of FIG. 1 is referred to as the X direction, and the front-back direction of the paper surface is referred to as the Y direction. The X direction and the Y direction are directions that are substantially orthogonal to each other. In FIG. 2, which will be described later, the left-right direction of the paper surface coincides with the Y direction, and the front-back direction of the paper surface coincides with the X direction.

(Concrete slab)
The concrete slab 30 forming the synthetic floor 20 is formed by burying a slab bar 32 in the concrete 34. The slab muscle 32 is formed to include a top muscle 32A, a bottom muscle 32B, and a lattice muscle 32C. The lattice muscle 32C has a wavy shape having an amplitude in the vertical direction, and connects the top muscle 32A and the bottom muscle 32B.

The slab bar 32 is manufactured by welding the lattice bar 32C to the top bar 32A and the bottom bar 32B, for example, in a factory or the like, and is carried into a construction site of a building. In the present embodiment, the slab bar 32 is placed on the beams 12 and 14 via the separators S1 and S2.

The plurality of bottom muscles 32B can be connected to each other by using the connecting muscle 32D. Thereby, the slab bar 32 can be arranged in the plane of the concrete slab 30.

In the concrete 34, a wooden floor board 40, which will be described later, is cast as a formwork (discarded formwork). By placing the concrete 34 in a state where the wooden floor board 40 is supported by a support (not shown), a synthetic floor in which the concrete slab 30 and the wooden floor board 40 are integrated is formed.

If the wooden floor board 40 is fixed to the slab bar 32, the concrete 34 can be cast in a state where the support work is omitted. Further, the support work can be omitted by connecting the wooden floor plate 40 to the beam 12 and the beam 14. These construction methods can be appropriately selected.

(Wooden floorboard)
As shown in FIG. 2, the wooden floor board 40 is formed by including a board member 42, a rail 44, and a connecting member 46.

The plate material 42 is formed by using CLT (Cross Laminated Timber). As the plate material 42, in addition to CLT, LVL (Laminated Veneer Lumber), laminated lumber, plywood, solid plate and the like may be used. A plurality of plate members 42 are arranged in the Y direction, and rails 44 are arranged between the plate members 42.

The rail 44 is an example of a rod-shaped member in the present invention, and is arranged along the end portion of the plate member 42 between the ends of the plate members 42 adjacent to each other in the Y direction. The rails 44 are arranged along the end faces of the plate members 42 adjacent to each other in a state of being in contact with the end faces along the X direction.

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

The rail 44 is formed by combining steel channel members 44A and 44B whose upper flange (upper side when assembled to the wooden floor plate 40) is longer than the lower flange. By welding the upper flanges of the channel members 44A and 44B to each other, a rail 44 having an engaging groove 44C formed between the lower flanges is formed.

The groove width of the engaging groove 44C can be adjusted by adjusting the overlapping width of the upper flanges of the channel materials 44A and 44B. That is, the same parts can be used to obtain variations in shape.

The channel members 44A and 44B are preferably formed so that the bending rigidity of the rail 44 in the longitudinal direction is larger than the bending rigidity of the plate member 42 in the longitudinal direction. Thereby, the bending of the plate material 42 can be suppressed.

Through holes are formed in the upper portion of the rail 44, that is, in each of the upper flanges of the channel members 44A and 44B. The shaft portion of the bolt B1 penetrates through this through hole, and the screw portion in the shaft portion projects above the rail 44. Further, the bolt head of the bolt B1 is welded to the channel material 44B.

The thickness of the rail 44 is substantially the same as the thickness of the plate member 42. The dimensions of the rail 44 in the longitudinal direction can be set as appropriate. When a plurality of rails 44 are arranged side by side in the longitudinal direction (X direction), the end faces of the rails 44 may be arranged so as to face each other, or the end faces may be arranged so as to be separated from each other.

As the rail 44, it is not always necessary to use a combination of the two channel materials 44A and 44B. For example, as the rail material, a lip channel steel having an engaging groove may be used, or an extruded aluminum product may be used. By using such a ready-made member, it is possible to reduce the labor required for processing the rail.

A connecting member 46 is fixed to the upper part of the rail 44. The connecting member 46 is formed by using a steel angle member, and a through hole is formed in the central portion of the piece of the connecting member 46 facing the rail 44. The connecting member 46 is fixed to the rail 44 by inserting the bolt B1 described above into the through hole and screwing the nut into the bolt B1.

Further, through holes are also formed at both ends of the piece of the connecting member 46 facing the rail 44. This through hole is a through hole for inserting the shaft portion of the screw T1. With the plate members 42 arranged on both sides of the rail 44, the connecting member 46 and the plate member 42 are fixed by striking the screw T1. As a result, the rail 44 and the plate member 42 are connected via the connecting member 46.

The other piece of the connecting member 46 is arranged so as to project upward. The bottom muscle 32B in the slab muscle 32 is placed on this piece. When the wooden floor board 40 is fixed to the slab bar 32 as described above, the connecting member 46 and the bottom bar 32B are fixed to each other. The connecting member 46 and the bottom bar 32B can be fixed by welding each other or by binding each other using a fastening bar (not shown).

<Suspended structure>
A bolt B2 as a hanging tool is attached to the rail 44. The bolt B2 is formed so that the diameter of the bolt head is larger than the groove width of the engaging groove 44C in the rail 44. As a result, the bolt B2 is unlikely to fall from the rail 44.

The bolt B2 is preferably attached to the rail 44 before the wooden floor plate 40 is integrated with the concrete slab 30. Since the diameter of the bolt head is larger than the groove width of the engaging groove 44C, it may be difficult to attach the bolt B2 to the rail 44 after the wooden floor plate 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 member 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 arranged (the gap between the plate members 42), and then slid in the lateral direction (X direction) to arrange the bolt head inside the rail 44. As a result, the bolt B2 can be engaged with the engaging groove 44C.

Alternatively, when a plurality of rails 44 are arranged in the longitudinal direction, the bolts B2 can be engaged with the engaging grooves 44C in the same manner by arranging the end faces of the rails 44 apart from each other.

The bolt B2 can be slid along the longitudinal direction (X direction) of the rail 44 in a state of being engaged with the engaging groove 44C. Further, the bolt B2 can be fixed to the rail 44 by screwing the nut into the bolt B2. That is, the bolt B2 can be fixed at an arbitrary position in the X direction.

In FIG. 2, the bolt B2 is described as having a length to which a nut can be screwed in, but the length of the bolt B2 is arbitrary. If the bolt B2 is formed to be long, it is easy to hang a duct, a ceiling material, a lighting fixture, or the like by using the bolt B2.

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

The rail 50 is preferably fixed to a plurality of rails 44. As a result, the rail 50 is supported at two or more points.

<Action and effect>
In the synthetic floor 20 according to the embodiment of the present invention, as shown in FIG. 2, rails 44 as rod-shaped members are arranged between the ends of the plate members 42 made of wood-based material (CLT). The rail 44 is arranged along the end portion of the plate member 42. Further, a connecting member 46 for connecting the plate members 42 adjacent to each other is fixed to the upper portion of the rail 44.

That is, the plate members 42 adjacent to each other are connected by the connecting member 46 with the rail 44 sandwiched between them. As a result, even when the plate members 42 are bent due to the weight of the concrete slab 30, the displacement between the end portions is less noticeable as compared with the case where the plate members 42 adjacent to each other are directly connected to each other.

By forming the flexural rigidity of the rail 44 in the longitudinal direction larger than the flexural rigidity of the plate 42 in the longitudinal direction, the bending of the plate 42 due to the weight of the concrete slab 30 can be reduced.

As a result, the deviation between the ends of the plate members 42 adjacent to each other can be made less noticeable. Further, since the bending of the plate material 42 is reduced, it is possible to suppress leakage of fresh concrete from between the plate material 42 and the plate material 42.

Further, in the synthetic floor 20 according to the embodiment of the present invention, a bolt B2 as a hanging tool is attached to the rail 44. As a result, equipment, piping, ceiling materials, etc. can be hung from the synthetic floor 20. Therefore, the configuration below the synthetic floor 20 can be simplified as compared with the configuration in which a member for attaching the hanging tool is separately provided. Therefore, the workability is high and the aesthetic appearance is not easily spoiled.

Further, since the equipment and the like can be hung from the rail 44, it is not necessary to perform a drilling process or the like for suspending the equipment or the like from the plate material 42. Therefore, it is possible to suppress the cross-sectional defect of the synthetic floor 20. As a result, deterioration of the structural performance of the synthetic floor 20 can be suppressed. In addition, it is possible to suppress the leakage of slag from the perforated portion.

Further, the bolt B2 can be slid laterally while being attached to the rail 44. As a result, the degree of freedom in the layout of the article suspended by the bolt B2 can be increased.

Further, 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. The rail 50 extends along a direction intersecting the rail 44. The "intersection direction" includes a direction substantially orthogonal to the rail 44 and an arbitrary direction.

As a result, the slidable direction of the bolt B2 is limited to the X direction, but the bolt B3 can be fixed at an arbitrary position on the plane. That is, by using the bolt B2, the rail 50, and the bolt B3 together, the degree of freedom in the layout of the article can be further increased.

Further, in the synthetic floor 20 according to the embodiment of the present invention, the connecting member 46 is formed by using an angle member. One piece of the connecting member is fixed to the plate member 42, and the other piece projects upward. Therefore, the shearing force can be transmitted between the concrete slab 30 and the wooden floor board 40. That is, the shear resistance of the synthetic floor 20 is enhanced by the connecting member 46 acting as a shear key.

Wiring such as a cable can be passed through the inside of the rails 44 and 50. As a result, even when the ceiling material is not laid below the synthetic floor 20, the cables can be wired without being exposed.

Further, the rails 44 and 50 do not necessarily have to be attached with bolts B2 and B3 and hanging tools in place of them. For example, by using the rails 44 and 50 as duct rails and the like, lighting fixtures and the like can be directly hung. Further, the rail 50 does not necessarily have to be used and may be omitted.

<Other Embodiments>
As the rod-shaped member in the present invention, as in the rail 52 shown in FIG. 3, a rail provided with flanges 52A protruding to both sides may be used. The flange 52A is formed at the lower end of the rail 52 so as to project in a direction away from the rail 52 (X direction) and further folded upward. The end portion of the plate member 42 is placed on the flange 52A. As a result, the plate member 42 can be sandwiched and fixed between the flange 52A and the connecting member 46.

Further, by forming the flange 52A, a gap V1 can be secured between the end surface of the plate member 42 and the rail 52. By adjusting the width of this gap, it is possible to absorb the construction error of the plate material 42.

Further, a gap V2 is formed in a portion where the flange 52A is folded upward. This gap V2 becomes a slag pool of fresh concrete, and can suppress slag leakage from between the plate material 42 and the plate material 42.

It should be noted that the plate material 42 does not necessarily have to be fixed to the rails (rails 44, 52) at both ends. For example, one end of the plate member 42 may be placed on the beam 16. In this case, the rail 50 can be restrained by supporting the end of the rail 50 with a support member 54 or the like.

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

As the plate material 62, various wood-based materials can be used as in the plate material 42. The concrete plate 64 is a precast concrete plate, and is integrally formed with the plate material 42 in the factory.

From the viewpoint of weight reduction, it is preferable that the concrete plate 64 is provided with a hollow portion 64A (void) in the longitudinal direction. Further, from the viewpoint of ensuring a long span, it is preferable to apply prestress to the concrete plate 64 by a PC steel rod (not shown).

By using the plate material 60 in which the plate material 62 made of wood-based material and the concrete plate 64 are integrated in this way, the volume of the concrete 34 cast in the field can be reduced and the work in the field can be reduced.

Instead of the concrete plate 64, the concrete plate 66 shown in FIG. 5 may be used. In the concrete plate 66, ribs 66A along the longitudinal direction (X direction) are formed at predetermined intervals in the Y direction. By arranging the foaming material 66B or the like between the ribs 66A adjacent to each other, the amount of the concrete 34 cast can be reduced.

As described above, as the plate material in the present invention, a material using only a wood material (for example, a plate material 42) or a combination of a wood material and concrete (for example, a plate material 62) can be used. Further, as the concrete to be combined with the wood material, various precast concretes (for example, concrete plates 64 and 66) can be used.

Further, in the present embodiment, rails such as rails 44 and 52 are used as the rod-shaped member, but the embodiment of the present invention is not limited to this. For example, as the rod-shaped member, a member having a female screw into which a bolt can be screwed may be used. In this case, the female threads are preferably formed at predetermined intervals in the longitudinal direction of the rod-shaped member. As described above, the present invention can be implemented in various aspects.

20 Synthetic floor 30 Concrete slab 42 Plate material 44 Rail (rod-shaped member)
46 Connecting member 52 Rail (rod-shaped member)
60 Plate material B2 bolt (hanging tool)

Claims (3)

Multiple boards formed using wood-based materials and
A concrete slab provided on the plate material adjacent to each other and integrated with the plate material,
A rod-shaped member arranged along the end between the ends of the plate materials adjacent to each other,
A connecting member fixed to the upper part of the rod-shaped member, embedded in the concrete slab, and connecting the plate members adjacent to each other.
Synthetic floor with. A hanger is attached to the rod-shaped member.
The synthetic floor according to claim 1. The rod-shaped member is formed in the shape of a rail on which the hanger can slide.
The synthetic floor according to claim 2.

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