JP2024042355A - Reinforcing steel materials for floors and floor structures - Google Patents

Abstract

[Problem] To provide a floor reinforcing steel material and a floor structure capable of increasing the strength of a floor panel having a hollow portion. [Solution] A floor reinforcing steel material 3 comprises a reinforcing steel material body 31 that can be inserted into a hollow portion 21 of a floor panel 2, a biasing member 32 provided on the reinforcing steel material body 31, and a pair of end fixing means 35 that fix both ends of the reinforcing steel material body 31 in the longitudinal direction D2 to the floor panel 2. The biasing member 32 is provided between the pair of end fixing means 35 located at both ends of the reinforcing steel material body 31 in the longitudinal direction D2. The biasing member 32 biases the reinforcing steel material body 31 toward the hollow portion upper surface 211 while in contact with the hollow portion lower surface 212 that faces the hollow portion upper surface 211 within the hollow portion 21. [Selected Figure] Figure 2

Description

The present invention relates to floor reinforcing steel materials and floor structures used for building floors.

A known floor structure for a building is one in which multiple floor panels are provided on supports such as floor beams and joists (see, for example, Patent Document 1). The floor panels have a hollow portion extending in a specific direction, and the floor panels are provided with through holes that communicate with the hollow portion. Such floor panels are fixed to the support by a clip that includes a spring body with a nut portion and a hook body with a hook portion. In this case, the hook portion of the hook body is engaged with the support and the spring body is inserted into the hollow portion, and the bottom surface of the floor panel is sandwiched between the hook body and the spring body. In this state, a bolt is passed through the through hole of the floor panel and screwed into the nut portion of the spring body. In this way, the floor panel is fixed to the support.

Utility Model Publication No. 6-62004

In floor structures, floor panels need to be strong enough to withstand the load applied to them. However, the technology described in Patent Document 1 does not take into account the load resistance required for floor panels in office applications, etc., and there is a risk that the strength of the floor panels will be insufficient.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a floor reinforcing steel material and a floor structure that can increase the strength of a floor panel having a hollow portion.

In order to solve the above problems, a floor reinforcing steel material according to a first invention is a floor reinforcing steel material that is used by being inserted into a hollow part of a floor panel having a hollow part extending in a predetermined longitudinal direction. . This reinforcing steel material for floors includes a reinforcing steel main body having a length that can be arranged between both ends of the longitudinal direction of the hollow part and a cross-sectional shape that can be inserted into the hollow part, A pair of fixing means fixing both ends of the direction to the floor panel, and a biasing means including at least one biasing member provided on the reinforcing steel main body. The biasing member is provided between the pair of fixing means located at both ends of the reinforcing steel main body, and biases the reinforcing steel main body while it is in contact with the inner surface of the hollow portion.

According to the floor reinforcing steel material according to the first invention, when the floor reinforcing steel material is inserted into the hollow part of the floor panel, the reinforcing steel main body is urged by the biasing member and contacts the inner surface of the hollow part. In the abutting state, both longitudinal ends are fixed to the floor panel by a pair of fixing means. At this time, since the reinforcing steel main body is disposed between both longitudinal ends of the hollow part of the floor panel, it is possible to increase the strength of the floor panel having the hollow part.

A second invention is the reinforcing steel material for floors according to the first invention, in which the biasing means includes a plurality of the urging means provided between the pair of fixing means located at both ends of the reinforcing steel main body. It may also include a force member. Each of the plurality of biasing members extends from a predetermined position between the pair of fixing means located at both ends of the reinforcing steel main body toward the opposing surface of the inner surface, and the reinforcement member for the hollow portion. The plate spring may have a curved surface shape that is curved toward the downstream side in the insertion direction of the steel main body.

In this aspect, a plurality of biasing members are provided between the pair of fixing means in the longitudinal direction of the reinforcing steel body. Thereby, the intermediate region between the pair of fixing means in the longitudinal direction of the reinforcing steel body can be more reliably brought into contact with the inner surface of the hollow part by the urging force of the plurality of urging members. Therefore, by fixing the reinforcing steel main body in a state where it is in contact with the inner surface of the hollow part, it becomes possible to more reliably increase the strength of the floor panel having the hollow part.

Furthermore, when plate springs having a curved surface shape are used as the plurality of biasing members provided to the reinforcing steel body, the direction of curvature of the plate springs influences the insertability of the reinforcing steel body into the hollow portion. For example, a plate spring having a curved surface shape curved toward the downstream side in the insertion direction of the reinforcing steel main body into the hollow part and a flat spring having a curved surface shape curved toward the upstream side in the insertion direction are provided to the reinforcing steel main body. Assume a case where In this case, when inserting the reinforcing steel body into the hollow part of the floor panel, the plate spring having a curved surface shape curved upstream in the insertion direction may get caught in the hollow part, so the reinforcing steel body against the hollow part may There is a possibility that insertion may be inhibited.

Therefore, when using curved leaf springs as the plurality of biasing members, the leaf springs extend from a predetermined position between a pair of fixing means in the reinforcing steel body toward the opposing surface of the hollow part, and the reinforcing steel main body against the hollow part extends from a predetermined position between the pair of fixing means in the reinforcing steel body The leaf spring has a curved surface shape that curves toward the downstream side in the insertion direction. This makes it possible to prevent each leaf spring serving as a plurality of biasing members from interfering with insertion of the reinforcing steel main body into the hollow portion.

A third invention is the reinforcing steel material for floors according to the first or second invention, in which the reinforcing steel main body has a length extending between both ends of the hollow part in the longitudinal direction and a predetermined bending in the longitudinal direction. It may also have rigidity.

In this aspect, the reinforcing steel main body, which is fixed in contact with the inner surface of the hollow part of the floor panel, has a length extending between both longitudinal ends of the hollow part and a predetermined bending rigidity. It becomes possible to more reliably increase the strength of the floor panel having the section.

A fourth invention is the reinforcing steel material for floors according to the third invention, in which the reinforcing steel main body is applied to the floor by the urging force of the urging member in a state where the reinforcing steel main body is positioned with respect to the hollow part. The panel may further include an engaging portion that engages with the engaged portion provided on the panel.

In this aspect, with the reinforcing steel main body inserted into the hollow part of the floor panel, the engaging part engages with the engaged part of the floor panel by the biasing force of the biasing member. The reinforcing steel main body can be positioned with respect to the hollow portion by engagement of the engaging portion with the floor panel in a state where the reinforcing steel main body is inserted into the hollow portion.

In a fifth invention, in the floor reinforcing steel material according to the fourth invention, a plurality of the engaging portions may be provided in the reinforcing steel main body. In this case, the plurality of engaging portions may be spaced apart from each other in the longitudinal direction of the reinforcing steel main body, and may be provided at positions shifted from each other in the width direction of the reinforcing steel main body.

In this aspect, the reinforcing steel main body can be positioned at a more appropriate position with respect to the hollow part by the engagement of the plurality of engaging parts with the floor panel while the reinforcing steel main body is inserted into the hollow part.

A sixth invention is the reinforcing steel material for floors according to any one of the first to fifth inventions, wherein the reinforcing steel main body may have a pair of end through holes provided at each of the both ends. good. In this case, the pair of fixing means may include a bolt inserted into the pair of end through holes, and a nut having a threaded portion that can be screwed into the bolt.

In this aspect, when the reinforcing steel main body is inserted into the hollow part of the floor panel, the bolts inserted into the pair of end through holes are screwed into the threaded part of the nut at each end area of both longitudinal ends. By doing so, it is fixed in contact with the inner surface of the hollow part.

The floor structure according to the seventh invention comprises a floor panel having a hollow portion extending in a predetermined longitudinal direction, and a floor reinforcing steel member according to any one of the first to sixth inventions, which is inserted into the hollow portion.

As explained above, according to the present invention, it is possible to provide a floor reinforcing steel material and a floor structure that can increase the strength of a floor panel having a hollow portion.

FIG. 1 is a perspective view of a floor structure including a floor panel to which a floor reinforcing steel material according to an embodiment of the present invention is applied. FIG. 3 is a sectional view showing a state in which a floor reinforcing steel material is inserted into a hollow part of a floor panel. It is a perspective view of the reinforcing steel material for floors. It is a figure explaining the construction method at the time of attaching the reinforcement steel material for floors to a floor panel using the cross-sectional view of a floor panel and the reinforcement steel materials for floors. It is a cross-sectional view showing the floor reinforcing steel material according to the first modified embodiment, and is a diagram showing a state in which the floor reinforcing steel material is inserted into the hollow part of the floor panel. It is a cross-sectional view showing the reinforcing steel material for a floor according to a second modified embodiment, and is a diagram showing a state in which the reinforcing steel material for the floor is inserted into a hollow part of the floor panel.

EMBODIMENT OF THE INVENTION Hereinafter, a floor reinforcing steel material and a floor structure provided with the same according to an embodiment of the present invention will be described based on the drawings. In addition, below, the directional relationship will be explained using XYZ orthogonal coordinate axes. The X-axis direction is a direction parallel to the horizontal plane, the Y-axis direction is a direction perpendicular to the X-axis direction on the horizontal plane, and the Z-axis direction is an up-down direction perpendicular to both the X and Y directions.

FIG. 1 shows a floor structure 1 including a floor panel 2 to which a floor reinforcing steel material 3 according to the present embodiment is applied. Further, FIG. 2 shows a state in which the floor reinforcing steel material 3 is inserted into the hollow portion 21 of the floor panel 2. The floor structure 1 is, for example, a part of a steel-framed building, and constitutes the floor of one level. The floor structure 1 includes a plurality of floor panels 2 having a hollow part 21 extending in a predetermined direction, a floor reinforcing steel material 3 inserted into the hollow part 21, a plurality of floor beams 4 supporting each floor panel 2, and a floor panel 2. A plurality of vibration isolators 5 provided on the beam 4 are provided.

In the example of FIG. 1, the plurality of floor beams 4 extend in the X-axis direction and are arranged parallel to each other at predetermined intervals in the Y-axis direction. The floor beam 4 is made of, for example, an H-shaped steel having an H-shaped cross section. In this case, the floor beam 4 has a pair of flanges 41 and a web 42 that connects the flanges 41 to each other. The floor beam 4 is arranged so that the pair of flanges 41 are aligned in the Z-axis direction and extend in the X-axis direction.

The plurality of floor panels 2 are supported from below by each floor joist 4 while straddling between two adjacent floor joists 4 and disposed adjacent to each other in the X-axis direction. The floor panel 2 is made of, for example, a hollow extruded cement board, and has at least one hollow part 21 extending in a predetermined direction. The floor panel 2 is a plate-shaped member having a rectangular planar shape extending in the longitudinal direction D1 (FIG. 2) of the hollow portion 21. The floor panel 2 is placed so that the longitudinal direction D1 of the hollow portion 21 coincides with the Y-axis direction, and is spanned between two floor beams 4 as shown in FIG. Specifically, each end of the floor panel 2 in the longitudinal direction D1 (Y-axis direction) is supported from below by the flange 41 of each floor beam 4. Note that the shape of the hollow portion 21 when viewed in the longitudinal direction D1 is not particularly limited, but is, for example, rectangular.

Further, as shown in FIG. 2, the floor panel 2 has a pair of end bolt holes 22A at both ends in the longitudinal direction D1 that communicate with the hollow portion 21 and into which the bolts 6 are inserted. Furthermore, the floor panel 2 may have an intermediate opening hole 22B that is provided in the intermediate region between the pair of end bolt holes 22A in the longitudinal direction D1 and opens into the hollow portion 21. As shown in FIG. 2, it is preferable that the intermediate opening hole 22B communicates the hollow portion 21 with the outside of the floor panel 2. In this case, the intermediate opening hole 22B communicates with the hollow portion 21 in the intermediate region in the longitudinal direction D1 of the floor panel 2, and allows the bolt 6 to be inserted therethrough. In this embodiment, each of the pair of end bolt holes 22A is a hole extending from the top surface of the floor panel 2 to the hollow portion 21, and the intermediate opening hole 22B is an opening hole extending from the top surface of the floor panel 2 to the hollow portion 21. be. That is, the upper surface of the floor panel 2 is provided with a pair of end bolt holes 22A and an intermediate opening hole 22B that communicate with the hollow portion 21. In the example of FIG. 2, on the upper surface of the floor panel 2, a pair of end bolt holes 22A are provided in each end area of both ends in the longitudinal direction D1, and in an intermediate area between each end area in the longitudinal direction D1. Two intermediate opening holes 22B are provided. In this case, the interval between the end bolt hole 22A and the intermediate opening hole 22B and the interval between the two intermediate opening holes 22B are set to be equal intervals. Note that when the bolt 6 is inserted into the pair of end bolt holes 22A and the intermediate opening hole 22B, the washer 61 is disposed between the head of the bolt 6 and the floor panel 2. Further, the pair of end bolt holes 22A and the intermediate opening hole 22B may be formed with a counterbore so that the head of the bolt 6 inserted therein can be prevented from protruding upward from the upper surface of the floor panel 2.

In the floor panel 2 in which the upper surface is provided with a pair of end bolt holes 22A and an intermediate opening hole 22B that communicate with the hollow portion 21, a pair of end bolts are provided on the hollow portion upper surface 211 facing downward on the inner surface of the hollow portion 21. The openings of the hole 22A and the intermediate opening hole 22B are formed, and the hollow lower surface 212 facing upward on the inner surface of the hollow portion 21 becomes an opposing surface facing the hollow portion upper surface 211 in the Z-axis direction.

Each of the plurality of vibration isolators 5 is a member that can be elastically deformed in response to relative movement of the floor panel 2 with respect to the floor beam 4. The vibration isolating material 5 is made of, for example, synthetic resin such as polyurethane or rubber. The plurality of vibration isolators 5 each suppress transmission of vibration from the floor panel 2 to the floor beam 4 by elastically deforming between the floor beam 4 and the floor panel 2. The dimensions, hardness, arrangement position, and number of the vibration isolators 5 are determined based on the load that the vibration isolators 5 receive ( That is, it is set based on the weight of the floor panel 2 placed on the vibration isolating material 5 and the load that the floor panel 2 receives. In FIG. 1, an example is shown in which the vibration isolators 5 are arranged on the upper flange 41 of the pair of flanges 41 of the floor beam 4 at positions corresponding to the four corners of each floor panel 2 in plan view. There is.

As shown in FIGS. 1 and 2, the floor reinforcing steel material 3 is a reinforcing steel material that is inserted into the hollow part 21 of the floor panel 2. The floor reinforcing steel material 3 is inserted from one side of the hollow portion 21 in the longitudinal direction D1 toward the other side. That is, the insertion direction D3 of the floor reinforcing steel material 3 into the hollow part 21 is one direction from one side of the longitudinal direction D1 of the hollow part 21 to the other side. When the floor panel 2 has a plurality of hollow parts 21, the floor reinforcing steel material 3 is inserted into at least one hollow part 21. For example, as shown in FIG. 1, when the floor panel 2 has three hollow parts 21 lined up in the X-axis direction, the floor reinforcing steel material 3 may be inserted into all three hollow parts 21, The floor reinforcing steel material 3 may be inserted into the hollow part 21 located at the center of the two hollow parts 21 in the X-axis direction. Further, the floor reinforcing steel material 3 may be inserted into each of the three hollow parts 21 located at both ends in the X-axis direction.

The floor reinforcing steel material 3 will be described in detail with reference to FIGS. 3 and 4 in addition to FIG. 2. The floor reinforcing steel material 3 includes a reinforcing steel main body 31, a biasing means including at least one biasing member 32 provided on the reinforcing steel main body 31, and both ends of the reinforcing steel main body 31 in the longitudinal direction D2. A pair of end fixing means 35 fixed to the panel 2 are provided. The reinforcing steel main body 31 and the biasing member 32 are made of steel. Further, in this embodiment, the biasing means is constituted by a plurality of biasing members 32 including a first biasing member 321 and a second biasing member 322. That is, a plurality of biasing members 32 including a first biasing member 321 and a second biasing member 322 are provided to the reinforcing steel main body 31.

The reinforcing steel main body 31 extends in the longitudinal direction D2 and has a cross-sectional shape that can be inserted into the hollow portion 21 of the floor panel 2. The reinforcing steel main body 31 is inserted into the hollow portion 21 such that its longitudinal direction D2 coincides with the longitudinal direction D1 of the hollow portion 21. The reinforcing steel main body 31 is disposed between both ends of the hollow portion 21 in the longitudinal direction D1 in a state where it is inserted into the hollow portion 21 . It is preferable that the reinforcing steel main body 31 has a length that allows it to be placed between both ends of the hollow portion 21 in the longitudinal direction D1 in the floor panel 2, and has a predetermined bending rigidity in the longitudinal direction D2. In this case, the reinforcing steel main body 31 in the state inserted into the hollow part 21 extends between both ends of the hollow part 21 in the longitudinal direction D1. When the reinforcing steel main body 31 is inserted into the hollow part 21, each end area of both ends of the reinforcing steel main body 31 in the longitudinal direction D2 is inside each end area of both ends of the hollow part 21 in the longitudinal direction D1. positioned. In this case, the positions of the respective edges of the reinforcing steel main body 31 at both ends in the longitudinal direction D2 may match the positions of the respective edges of the hollow part 21 at both ends in the longitudinal direction D1.

The reinforcing steel body 31 has a first plate portion 311 that extends in the longitudinal direction D2 and abuts against the upper surface 211 of the hollow portion 21 when inserted into the hollow portion 21, and a pair of second plate portions 312 that extend in the longitudinal direction D2 and are connected to both side ends of the first plate portion 311. By making the reinforcing steel body 31 have a pair of second plate portions 312 that are connected to both side ends of the first plate portion 311, the bending rigidity of the reinforcing steel body 31 can be increased.

The reinforcing steel body 31 is provided at each end region of the first plate portion 311 at both ends in the longitudinal direction D2, and is spaced apart from each other so as to communicate with the pair of end bolt holes 22A of the floor panel 2. It may have a pair of end through holes 311A. As shown in FIG. 3, the pair of end through holes 311A are long holes having a predetermined length in the longitudinal direction D2 of the reinforcing steel main body 31. As shown in FIG. 2, when the reinforcing steel main body 31 is inserted into the hollow part 21 of the floor panel 2, the pair of end through holes 311A communicate with the pair of end bolt holes 22A. Then, with the first plate part 311 of the reinforcing steel main body 31 inserted into the hollow part 21 in contact with the hollow upper surface 211 in the hollow part 21, each end of the reinforcing steel main body 31 in the longitudinal direction D2 is The area is fixed to the floor panel 2 by a pair of end fixing means 35.

The structure of the pair of end fixing means 35 is not particularly limited as long as it is possible to fix each end area of both ends of the reinforcing steel main body 31 in the longitudinal direction D2 to the floor panel 2. In the example shown in FIG. 2, the pair of end fixing means 35 is integrated with a bolt 6 inserted from above into a pair of end bolt holes 22A and a pair of end through holes 311A, a clip 351, and a nut 352. Includes a clip nut. The nut 352 can communicate with the end through hole 311A and has a threaded portion that can be screwed into the bolt 6 inserted into the end through hole 311A. The clip 351 is an attachment part that can be attached to the end of the reinforcing steel main body 31 in the longitudinal direction D2 with the nut 352 positioned so that the threaded part of the nut 352 and the end through hole 311A communicate with each other. In the pair of end fixing means 35, the clips 351 are attached to the ends of the reinforcing steel body 31 in the longitudinal direction D2 such that the threaded portion of the nut 352 communicates with the end through hole 311A in the reinforcing steel body 31. In this case, in the reinforcing steel main body 31, the bolts 6 inserted into the pair of end bolt holes 22A and the pair of end through holes 311A in each end region of both ends in the longitudinal direction D2 are screwed into the threaded portion of the nut 352. By fitting together, it is fixed to the hollow upper surface 211 within the hollow portion 21.

As described above, in this embodiment, a plurality of biasing members 32 including a first biasing member 321 and a second biasing member 322 are provided for the reinforcing steel body 31. The first biasing member 321 and the second biasing member 322 are provided between a pair of end fixing means 35 located at both ends in the longitudinal direction D2 of the first plate portion 311 of the reinforcing steel body 31. Specifically, in the region between the pair of end fixing means 35 at the position of the pair of end through holes 311A on the surface opposite to the surface abutting the hollow portion upper surface 211 in the hollow portion 21 in the first plate portion 311, the first biasing member 321 is provided in the vicinity of one end fixing means 35, and the second biasing member 322 is provided in the vicinity of the other end fixing means 35. As shown in FIG. 2, the first biasing member 321 and the second biasing member 322 bias the reinforcing steel body 31 in a state of abutting the hollow portion upper surface 211 in the hollow portion 21. Specifically, the first biasing member 321 and the second biasing member 322 bias the reinforcing steel body 31 toward the upper surface 211 of the hollow portion while in contact with the lower surface 212 of the hollow portion 21 so that the reinforcing steel body 31 abuts against the upper surface 211 of the hollow portion 21.

In the floor structure 1, the floor panel 2 needs to have strength so that it can withstand the live load applied to the floor panel 2. For example, the floor structure 1 is required to have fire resistance performance in the event of a fire. In this case, even if cracks occur on the lower surface of the floor panel 2 and the strength of the floor panel 2 decreases when the floor panel 2 is exposed to flame from below with a predetermined live load applied from above. , the floor panel 2 needs to have sufficient strength to withstand the live load.

In the floor structure 1 according to this embodiment, the floor reinforcing steel material 3 is inserted into the hollow part 21 of the floor panel 2. In this floor reinforcing steel material 3, the reinforcing steel main body 31 is biased by the first biasing member 321 and the second biasing member 322 and is in contact with the hollow upper surface 211 in the hollow portion 21 in the longitudinal direction. Both ends of D2 are fixed to the floor panel 2 by a pair of end fixing means 35. Specifically, while the reinforcing steel main body 31 is in contact with the hollow upper surface 211 in the hollow portion 21, the bolts 6 inserted into the pair of end bolt holes 22A and the pair of end through holes 311A are inserted into the nuts. It is fixed to the hollow part upper surface 211 in the hollow part 21 by screwing with the threaded part 352. At this time, since the reinforcing steel body 31 is disposed between both ends of the hollow part 21 of the floor panel 2 in the longitudinal direction D1, it is possible to increase the strength of the floor panel 2 having the hollow part 21. Moreover, the reinforcing steel main body 31 fixed in contact with the hollow upper surface 211 in the hollow part 21 has a length that can be arranged between both ends of the hollow part 21 in the longitudinal direction D1, and Since it is fixed to the floor panel 2 and has a predetermined bending rigidity, the strength of the floor panel 2 having the hollow portion 21 can be increased more reliably.

Further, when inserted into the hollow part 21 of the floor panel 2, the reinforcing steel main body 31 is fixed to the floor panel 2 while being in contact with the hollow part upper surface 211 facing downward on the inner surface of the hollow part 21. As a result, even if the strength of the floor panel 2 decreases due to cracks occurring on the lower surface of the floor panel 2 due to flames coming from below during a fire, etc., the reinforcing steel main body is fixed in contact with the hollow upper surface 211. 31, it is possible to maintain a predetermined floor strength to withstand a predetermined load and prevent the floor panel 2 from falling.

Further, the first biasing member 321 and the second biasing member 322 are provided between a pair of end fixing means 35 located at both ends in the longitudinal direction D2 of the first plate portion 311 of the reinforcing steel main body 31. Thereby, the biasing force of the first biasing member 321 and the second biasing member 322 as the plurality of biasing members 32 is applied to the intermediate region between the pair of end fixing means 35 in the longitudinal direction D2 of the reinforcing steel main body 31. This allows for more reliable contact with the upper surface 211 of the hollow portion 21 . Therefore, by fixing the reinforcing steel main body 31 to the floor panel 2 while in contact with the hollow upper surface 211 in the hollow part 21, the strength of the floor panel 2 having the hollow part 21 can be more reliably increased. It becomes possible.

In this embodiment, a leaf spring having a curved surface is used as the first biasing member 321 and the second biasing member 322 provided for the reinforcing steel body 31. When a leaf spring having a curved surface is used, the curvature direction of the leaf spring affects the insertability of the reinforcing steel body 31 into the hollow portion 21. For example, assume that a leaf spring having a curved surface on the downstream side of the insertion direction D3 of the reinforcing steel body 31 into the hollow portion 21 and a leaf spring having a curved surface on the upstream side of the insertion direction D3 are provided for the reinforcing steel body 31. In this case, when the reinforcing steel body 31 is inserted into the hollow portion 21 of the floor panel 2, the leaf spring having a curved surface on the upstream side of the insertion direction D3 may get caught in the hollow portion 21, which may hinder the insertion of the reinforcing steel body 31 into the hollow portion 21.

Therefore, the first biasing member 321 and the second biasing member 322 are each placed at a predetermined position between the pair of end fixing means 35 located at both ends of the first plate portion 311 of the reinforcing steel main body 31 in the longitudinal direction D2. It is a plate spring having a curved surface shape extending from the center toward the hollow lower surface 212 in the hollow portion 21 and curved toward the downstream side in the insertion direction D3 of the reinforcing steel main body 31 into the hollow portion 21. This makes it possible to prevent the first biasing member 321 and the second biasing member 322 formed by the plate springs from obstructing the insertion of the reinforcing steel main body 31 into the hollow portion 21 . Note that the first biasing member 321 and the second biasing member 322 constituted by plate springs having a curved surface shape are arranged so that the fixing of the reinforcing steel main body 31 to the floor panel 2 by the pair of end fixing means 35 is not hindered. curve.

Further, as shown in FIG. 2, in this embodiment, the reinforcing steel main body 31 has a pair of end portions corresponding to a pair of end fixing means 35 located at both ends of the first plate portion 311 in the longitudinal direction D2. It has at least one intermediate through hole 311B that is provided in an intermediate region between the through holes 311A and can communicate with the intermediate opening hole 22B of the floor panel 2. In the example of FIG. 2, the reinforcing steel main body 31 has two intermediate through holes 311B corresponding to the two intermediate opening holes 22B provided in the floor panel 2. When the reinforcing steel main body 31 is inserted into the hollow portion 21 of the floor panel 2, each intermediate through hole 311B communicates with each intermediate opening hole 22B. Then, with the first plate part 311 of the reinforcing steel main body 31 inserted into the hollow part 21 in contact with the hollow upper surface 211 in the hollow part 21, each end of the reinforcing steel main body 31 in the longitudinal direction D2 is The inner region is fixed to the hollow upper surface 211 by bolts 6 inserted from above into the pair of end bolt holes 22A and the pair of end through holes 311A, and the intermediate region in the longitudinal direction D2 of the reinforcing steel main body 31 is It is fixed to the hollow upper surface 211 by bolts 6 inserted from above into the intermediate opening hole 22B and each intermediate through hole 311B. In this way, the reinforcing steel main body 31 is fixed by the bolts 6 at each end region and the intermediate region in the longitudinal direction D2 while being in contact with the hollow upper surface 211 in the hollow portion 21, thereby fixing the hollow portion 21. It becomes possible to increase the strength of the floor panel 2 with more certainty.

A fixing method for fixing the intermediate region in the longitudinal direction D2 of the reinforcing steel main body 31 to the hollow upper surface 211 in the hollow section 21 is not particularly limited. In the present embodiment, as shown in FIG. 2, the reinforcing steel main body 31 has a nut 34 having a threaded portion that can be screwed into the bolt 6 in each intermediate through hole in the first plate portion 311 of the reinforcing steel main body 31. 311B. In this case, the reinforcing steel main body 31 is constructed such that the bolts 6 inserted into the intermediate opening holes 22B and the intermediate through holes 311B are screwed into the threaded portion of the nut 34 in the intermediate region in the longitudinal direction D2. It is fixed to the hollow part upper surface 211.

Moreover, in this embodiment, as shown in FIGS. 2 and 3, the floor reinforcing steel material 3 includes an engaging portion 33. In the example of FIGS. 2 and 3, the floor reinforcing steel material 3 includes two engaging portions 33 corresponding to the two intermediate through holes 311B provided in the reinforcing steel main body 31. The engaging portion 33 engages with the engaged portion of the floor panel 2 by the urging force of the first urging member 321 and the second urging member 322 while the reinforcing steel body 31 is positioned with respect to the hollow portion 21. do. Specifically, in the engaging portion 33, when the reinforcing steel body 31 is inserted into the hollow portion 21, the pair of end through holes 311A communicate with the pair of end bolt holes 22A, and each intermediate through hole 311A communicates with the pair of end bolt holes 22A. With the reinforcing steel main body 31 positioned with respect to the hollow part 21 so that the holes 311B communicate with the intermediate opening holes 22B, the floor panel 2 is moved by the biasing forces of the first biasing member 321 and the second biasing member 322. engages with the engaged part of. When the reinforcing steel main body 31 is inserted into the hollow portion 21 , the engagement portion 33 engages with the floor panel 2 , so that the pair of end through holes 311A and each intermediate through hole 311B of the reinforcing steel main body 31 are inserted into the floor panel 2 . The reinforcing steel main body 31 can be positioned with respect to the hollow portion 21 so as to communicate with the pair of end bolt holes 22A and each intermediate opening hole 22B.

As described above, in the floor reinforcing steel material 3 according to the present embodiment, the reinforcing steel main body 31 is provided with a plurality of (two) engaging portions 33. The plurality of engaging portions 33 are respectively provided so as to be spaced apart from each other in the longitudinal direction D2 of the reinforcing steel main body 31. At this time, the plurality of engaging portions 33 may be provided at positions shifted from each other in the width direction (X-axis direction) orthogonal to the longitudinal direction D2 of the reinforcing steel main body 31. By engaging the plurality of engaging parts 33 with the floor panel 2 in a state where the reinforcing steel main body 31 is inserted into the hollow part 21, the reinforcing steel main body 31 can be positioned at a more appropriate position with respect to the hollow part 21. .

The engaging portion 33 is a protrusion that protrudes from the upper surface of the first plate portion 311 of the reinforcing steel main body 31 in an intermediate region between the pair of end through holes 311A corresponding to the pair of end fixing means 35, The reinforcing steel main body 31 is positioned with respect to the hollow portion 21 by being inserted into the intermediate opening hole 22B as an engaged portion in the floor panel 2 and engaging with the intermediate opening hole 22B. Specifically, the engaging portion 33 is a cylindrical projection that protrudes from the upper surface of the first plate portion 311 of the reinforcing steel main body 31 so as to surround the intermediate through hole 311B, and engages with the intermediate opening hole 22B. By doing so, the reinforcing steel main body 31 is positioned with respect to the hollow portion 21. In this case, since the engaging portion 33 is a cylindrical projection surrounding the intermediate through hole 311B of the reinforcing steel main body 31, when the engaging portion 33 is engaged with the intermediate opening hole 22B of the floor panel 2, the reinforcing steel main body 31 intermediate through holes 311B communicate with the intermediate opening holes 22B of the floor panel 2 more reliably.

As shown in FIG. 4, when inserting the floor reinforcing steel material 3 into the hollow part 21 of the floor panel 2 in the insertion direction D3 from one side to the other side in the longitudinal direction D1, the reinforcing steel material main body 31 Of the provided first biasing member 321 and second biasing member 322, while pushing down the reinforcing steel main body 31 against the biasing force of the second biasing member 322 on the downstream side in the insertion direction D3, The floor reinforcing steel material 3 is inserted until the first biasing member 321 on the side enters the hollow portion 21. By inserting the reinforcing steel material 3 for the floor while pushing down the reinforcing steel main body 31 into the hollow part 21 of the floor panel 2, the engaging part 33 provided on the first plate part 311 of the reinforcing steel main body 31 is inserted into the floor panel 2. 2 can be avoided from engaging with the end bolt hole 22A provided at one end in the longitudinal direction D1.

If the insertion operation of the floor reinforcing steel material 3 into the hollow part 21 is continued with the first biasing member 321 on the upstream side of the insertion direction D3 entering the hollow part 21, the engaging part 33 will eventually reach the first biasing member 321. It engages with the intermediate opening hole 22B of the floor panel 2 by the biasing force of the member 321 and the second biasing member 322. When the engaging portion 33 is engaged with the intermediate opening hole 22B of the floor panel 2, the reinforcing steel body 31 is positioned with respect to the hollow portion 21, and the first plate portion 311 of the reinforcing steel body 31 is inserted into the hollow portion 21. While contacting the hollow part upper surface 211, the pair of end through holes 311A communicate with the pair of end bolt holes 22A, and each intermediate through hole 311B communicates with each intermediate opening hole 22B.

Then, each end area of both ends in the longitudinal direction D2 of the reinforcing steel main body 31 is fixed to the hollow part upper surface 211 by the bolts 6 inserted through the pair of end bolt holes 22A and the pair of end through holes 311A. An intermediate region of the reinforcing steel main body 31 in the longitudinal direction D2 is fixed to the hollow upper surface 211 by bolts 6 inserted through each intermediate opening hole 22B and each intermediate through hole 311B. In this way, the reinforcing steel main body 31 is fixed by the bolts 6 at each end region and the intermediate region in the longitudinal direction D2 while being in contact with the hollow upper surface 211 in the hollow portion 21, thereby fixing the hollow portion 21. The strength of the floor panel 2 can be increased.

Although the floor reinforcing steel material 3 and the floor structure 1 including the same according to the embodiment of the present invention have been described above, the present invention is not limited thereto, and for example, the following modified embodiments may be adopted. be able to.

In the above embodiment, in correspondence with the two intermediate opening holes 22B provided in the floor panel 2, the reinforcing steel main body 31 of the floor reinforcing steel material 3 has a pair of intermediate opening holes 22B corresponding to the pair of end fixing means 35. Although a configuration has been described in which two intermediate through holes 311B are provided in the intermediate region between the end through holes 311A, the present invention is not limited to this. As shown in FIG. 5, in the floor reinforcing steel material 3 according to the first modified embodiment, one intermediate opening hole 22B is provided at the center position in the longitudinal direction D1 in the floor panel 2. The reinforcing steel main body 31 has one intermediate through hole 311B provided at the center of the intermediate region between the pair of end through holes 311A corresponding to the pair of end fixing means 35 in the first plate portion 311. In this case, the floor reinforcing steel material 3 includes one engaging portion 33 corresponding to the one intermediate through hole 311B provided in the reinforcing steel main body 31.

With the reinforcing steel main body 31 inserted into the hollow part 21, the engaging part 33 is moved to the center position in the longitudinal direction D1 of the floor panel 2 by the biasing forces of the first biasing member 321 and the second biasing member 322. The reinforcing steel main body 31 is positioned with respect to the hollow portion 21 by engaging with the provided intermediate opening hole 22B. When the engaging portion 33 is engaged with the intermediate opening hole 22B of the floor panel 2, the first plate portion 311 of the reinforcing steel main body 31 is pushed into the hollow portion by the urging force of the first urging member 321 and the second urging member 322. 21, the pair of end through holes 311A communicate with the pair of end bolt holes 22A, and the intermediate through hole 311B communicates with the intermediate opening hole 22B. Then, each end area of both ends in the longitudinal direction D2 of the reinforcing steel main body 31 is fixed to the hollow part upper surface 211 by the bolts 6 inserted through the pair of end bolt holes 22A and the pair of end through holes 311A. An intermediate region of the reinforcing steel main body 31 in the longitudinal direction D2 is fixed to the hollow upper surface 211 by a bolt 6 inserted through the intermediate opening hole 22B and the intermediate through hole 311B. In this way, the reinforcing steel main body 31 is in contact with the hollow upper surface 211 in the hollow part 21 due to the urging forces of the first urging member 321 and the second urging member 322, and the reinforcing steel main body 31 is moved in each end region in the longitudinal direction D2. By fixing with the bolts 6 in the intermediate region, it becomes possible to increase the strength of the floor panel 2 having the hollow portion 21.

Furthermore, in the embodiment described above, a configuration has been described in which the floor reinforcing steel material 3 includes two biasing members 32, the first biasing member 321 and the second biasing member 322, but the present invention is not limited to this. As shown in FIG. 6, in the floor reinforcing steel material 3 according to the second modified embodiment, one intermediate opening hole 22B is provided at the center position in the longitudinal direction D1 in the floor panel 2, similarly to the first modified embodiment. One intermediate through hole 311B is provided at the center position of the intermediate region between the pair of end through holes 311A corresponding to the pair of end fixing means 35 in the first plate part 311 of the reinforcing steel main body 31, One engaging portion 33 that can engage with the opening hole 22B is provided. In the floor reinforcing steel material 3 according to the second modified embodiment, one surface of the first plate part 311 of the reinforcing steel main body 31 is opposite to the surface that abuts the hollow upper surface 211 in the hollow part 21. One biasing member 32 is provided near the intermediate through hole 311B.

When the engaging portion 33 is engaged with the intermediate opening hole 22B of the floor panel 2, the urging force of the urging member 32 causes the first plate portion 311 of the reinforcing steel main body 31 to come into contact with the hollow upper surface 211 in the hollow portion 21. The pair of end through holes 311A communicate with the pair of end bolt holes 22A, and the intermediate through hole 311B communicates with the intermediate opening hole 22B. Then, each end area of both ends in the longitudinal direction D2 of the reinforcing steel main body 31 is fixed to the hollow part upper surface 211 by the bolts 6 inserted through the pair of end bolt holes 22A and the pair of end through holes 311A. An intermediate region of the reinforcing steel main body 31 in the longitudinal direction D2 is fixed to the hollow upper surface 211 by a bolt 6 inserted through the intermediate opening hole 22B and the intermediate through hole 311B. In this way, the reinforcing steel main body 31 is fixed by the bolts 6 in each end region and the intermediate region in the longitudinal direction D2 while being in contact with the hollow upper surface 211 in the hollow portion 21 due to the biasing force of the biasing member 32. By doing so, it becomes possible to increase the strength of the floor panel 2 having the hollow portion 21.

Note that the above-described specific embodiments mainly include inventions having the following configurations.

The floor reinforcing steel material according to the first invention is a floor reinforcing steel material that is used by being inserted into the hollow part of a floor panel having a hollow part extending in a predetermined longitudinal direction. This reinforcing steel material for floors includes a reinforcing steel main body having a length that can be arranged between both ends of the longitudinal direction of the hollow part and a cross-sectional shape that can be inserted into the hollow part, A pair of fixing means fixing both ends of the direction to the floor panel, and a biasing means including at least one biasing member provided on the reinforcing steel main body. The biasing member is provided between the pair of fixing means located at both ends of the reinforcing steel main body, and biases the reinforcing steel main body while it is in contact with the inner surface of the hollow portion.

A second invention is the reinforcing steel material for floors according to the first invention, in which the biasing means includes a plurality of the urging means provided between the pair of fixing means located at both ends of the reinforcing steel main body. It may also include a force member. Each of the plurality of biasing members extends from a predetermined position between the pair of fixing means located at both ends of the reinforcing steel main body toward the opposing surface of the inner surface, and the reinforcement member for the hollow portion. The plate spring may have a curved surface shape that is curved toward the downstream side in the insertion direction of the steel main body.

A third invention is the reinforcing steel material for floors according to the first or second invention, in which the reinforcing steel main body has a length extending between both ends of the hollow part in the longitudinal direction and a predetermined bending in the longitudinal direction. It may also have rigidity.

A fourth invention is the reinforcing steel material for floors according to the third invention, in which the reinforcing steel main body is applied to the floor by the urging force of the urging member in a state where the reinforcing steel main body is positioned with respect to the hollow part. The panel may further include an engaging portion that engages with the engaged portion provided on the panel.

In a fifth invention, in the floor reinforcing steel material according to the fourth invention, a plurality of the engaging portions may be provided in the reinforcing steel main body. In this case, the plurality of engaging portions may be spaced apart from each other in the longitudinal direction of the reinforcing steel main body, and may be provided at positions shifted from each other in the width direction of the reinforcing steel main body.

A sixth invention is the reinforcing steel material for floors according to any one of the first to fifth inventions, wherein the reinforcing steel main body may have a pair of end through holes provided at each of the both ends. good. In this case, the pair of fixing means may include a bolt inserted into the pair of end through holes, and a nut having a threaded portion that can be screwed into the bolt.

A floor structure according to a seventh invention includes: a floor panel having a hollow part extending in a predetermined longitudinal direction; and a floor reinforcing steel material according to any one of the first to sixth inventions, which is inserted into the hollow part. , is provided.

1 Floor structure 2 Floor panel 21 Hollow part 3 Reinforcing steel for the floor 31 Reinforcing steel main body 32 Biasing member 33 Engaging portion 35 Pair of end fixing means 6 Bolt (fixing means)

Claims (7)

A floor reinforcing steel material that is used for a floor panel having a hollow portion extending in a predetermined longitudinal direction by being inserted into the hollow portion,
a reinforcing steel main body having a length that can be arranged between both longitudinal ends of the hollow part and a cross-sectional shape that can be inserted into the hollow part;
a pair of fixing means for fixing each of the longitudinal ends of the reinforcing steel main body to the floor panel;
a biasing means including at least one biasing member provided on the reinforcing steel main body,
The biasing member is provided between the pair of fixing means located at both ends of the reinforcing steel main body, and biases the reinforcing steel main body while it is in contact with the inner surface of the hollow part. Reinforced steel. The biasing means includes a plurality of biasing members provided between the pair of fixing means located at both ends of the reinforcing steel main body,
Each of the plurality of biasing members extends from a predetermined position between the pair of fixing means located at both ends of the reinforcing steel main body toward the opposing surface of the inner surface, and also extends toward the inner surface facing the reinforcing steel main body. The floor reinforcing steel material according to claim 1, which is a plate spring having a curved surface shape curved toward the downstream side in the insertion direction. The reinforcing steel material for a floor according to claim 1, wherein the reinforcing steel main body has a length extending between both ends of the hollow portion in the longitudinal direction, and a predetermined bending rigidity in the longitudinal direction. The floor reinforcing steel material according to claim 3, further comprising an engaging portion that engages with an engaged portion provided on the floor panel by the biasing force of the biasing member when the reinforcing steel body is positioned relative to the hollow portion. The engaging portion is provided in plurality on the reinforcing steel body,
5. The floor reinforcing steel material according to claim 4, wherein the engaging portions are spaced apart from one another in the longitudinal direction of the reinforcing steel body and are provided at positions offset from one another in the width direction of the reinforcing steel body. The reinforcing steel main body has a pair of end through holes provided at each of the both ends,
The reinforcing steel material for floors according to claim 1, wherein the pair of fixing means includes a bolt inserted into the pair of end through holes, and a nut having a threaded portion that can be screwed into the bolt. a floor panel having a hollow portion extending in a predetermined longitudinal direction;
A floor structure comprising: the floor reinforcing steel material according to any one of claims 1 to 6, which is inserted into the hollow part.