Bed structure

Abstract

To provide a floor structure capable of suppressing vibration by improving floor vibration interlocking effect while facilitating construction.SOLUTION: A floor structure 100 is provided with a beam 11, a plurality of floor panels 12 supported by the beam 11 and having chamfered end surfaces 123 at corners between upper surfaces 121 and side surfaces 122, the side surfaces 122 being positioned to face each other, joint members 13 supported by the end surfaces 123 of the adjacent floor panels 12, floor base materials 14 supported by the upper surfaces 121 of the plurality of floor panels 12 and the joint members 13, and screws 15 fixing the floor base materials 14 to the floor panels 12.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a floor structure having floor panels constructed by a floor panel dry construction method. [Background technology]

[0002] Conventionally, there has been known a floor structure in which a floor underlayment is fixed to the upper surfaces of floor panels, which are, for example, ALC panels arranged horizontally. As a method for joining floor panels, a method has been proposed in which reinforcing bars are laid in the grooves of the joints between adjacent floor panels, and then mortar is filled in to fix the floor panels (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 59-96347 Summary of the Invention [Problem to be solved by the invention]

[0004] The joining method described in Patent Document 1 connects floor panels together, which has the advantage of improving the interlocking effect against vertical floor vibrations of the floor panels caused by walking, etc. The improved floor vibration interlocking effect suppresses vibrations of the entire floor panel. On the other hand, there is a construction method in which floor panels are fixed to beams using mounting brackets without using mortar. The method using mounting brackets has the advantage of being easier to install than the method using mortar. It would be preferable if the method using mounting brackets could improve the floor vibration interlocking effect.

[0005] The present invention has been made in consideration of the above problems, and its purpose is to provide a floor structure that is easy to install and can suppress vibration by improving the floor vibration linkage effect. [Means for solving the problem]

[0006] (1) The floor structure of the present invention comprises a beam, a plurality of floor panels supported by the beam, each having a chamfered end face at the corner between the top surface and the side surface, with the sides facing each other, joint members supported by the end faces of adjacent floor panels, a floor underlayment material supported by the top surfaces of the plurality of floor panels and the joint members, and screws for fixing the floor underlayment material to the floor panels.

[0007] When floor panels are subjected to vibrations caused by the load, they are displaced so that they sink downward relative to adjacent floor panels in the horizontal direction. The downwardly displaced floor panels apply a downward force to the subfloor material via the screws. The joint members apply an upward force to the subfloor material, which is deformed by the force of the screws. A shear force due to the force is generated between the screws and the joint members in the subfloor material. The position where the upward force is applied is closer to the screws than the position where the upward force would be applied by an adjacent floor panel if there were no joint members. The closer the positions of the two forces are, the greater the rigidity of the subfloor material, and therefore the smaller the deflection of the subfloor material. By reducing the deflection, vibration can be suppressed.

[0008] (2) The rigidity of the joint member is preferably greater than the rigidity of the underfloor material.

[0009] (3) The joint members are preferably angle members that abut against the end faces of the adjacent floor panels.

[0010] (4) The joint members are preferably rods having a triangular cross section and having outer surfaces that abut against the end faces of the adjacent floor panels.

[0011] By using a rod-shaped joint member, the strength of the joint member against deformation can be improved compared to angle iron made of the same material.

[0012] (5) The joint member is preferably a band material wound spirally.

[0013] Even if there are dimensional errors such as angles on the end faces of adjacent floor panels, the errors can be absorbed by the joint members, making it easy to position the joint members.

[0014] (6) It is preferable that the floor panel has a rectangular outer shape in a plan view, the end face extends along the long side of the rectangle, and the joint member is located near the center of the end face in the direction along the long side.

[0015] According to the above configuration, the joint members can be positioned at positions on the floor panel that experience relatively large displacement. Since vibrations at positions that experience large displacement can be suppressed, the floor vibration linkage effect can be improved and vibrations can be suppressed.

[0016] (7) It is preferable that the floor underlayment has a rectangular outer shape in a plan view and is larger than the floor panel, and that the floor underlayment is arranged so that the long side of the rectangle of the floor panel and the long side of the rectangle of the floor underlayment are perpendicular to each other.

[0017] (8) The floor structure of the present invention comprises a beam, a plurality of floor panels supported by the beam, each having a chamfered end face at the corner between the top surface and the side surface, and each having its side surface facing each other, a joint member extending along the side surface of adjacent floor panels and supported on the end face, a floor underlayment material supported on the top surfaces of the plurality of floor panels and the joint member, and screws for fixing the floor underlayment material to the floor panels, wherein the screws comprise first screws arranged in a matrix in the horizontal direction, and second screws arranged in a direction intersecting the extension direction of the joint member and closer to the joint member on one side as viewed from the joint member than the distance between the joint member and the first screw.

[0018] According to the above configuration, when a floor panel is subjected to vibration due to a load, it displaces so that it sinks downward relative to horizontally adjacent floor panels. The downwardly displacing floor panel applies a downward force to the subfloor material via the screws. The joint member applies an upward force to the subfloor material, which is deformed by the force of the screws. A shear force due to the force is generated between the screws in the subfloor material and the joint member. By positioning the second screw in addition to the first screw, the distance between the joint member and the screw is shorter than when only the first screw is present. The shorter distance reduces the deflection of the subfloor material, improving the floor vibration linkage effect and suppressing vibration.

[0019] (9) It is preferable that the joint member is sandwiched between a pair of the screws in a direction intersecting the extension direction of the joint member, and that one of the pair of screws is positioned at a distance from the joint member that matches the distance between the joint member and the other of the screws.

[0020] According to the above configuration, the joint member is fixed to the underfloor panel by a pair of screws sandwiching the joint member, so that even if one of the adjacent floor panels is displaced so as to sink, the floor vibration linkage effect is improved and vibration can be suppressed. [Effects of the Invention]

[0021] According to the floor structure of the present invention, construction is easy and vibration can be suppressed by improving the floor vibration interlocking effect. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is an exploded perspective view of the floor structure. [Figure 2] FIG. 2 is a plan view showing the positional relationship between the floor panel and the joint member. [Figure 3] FIG. 3 is a plan view of the floor structure. [Figure 4] FIG. 4 is a perspective view of a floor panel. [Figure 5] FIG. 5 is a plan view showing the positional relationship between the floor panel and the joint member in the first embodiment. [Figure 6] FIG. 6 is a cross-sectional view taken along line AA in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line AA showing the relationship between the underfloor material and the joint member in response to the movement of the floor panel in the first embodiment. [Figure 8] FIG. 8 is a plan view showing the positional relationship between the floor panel and the joint member in the second embodiment. [Figure 9] FIG. 9 is a cross-sectional view taken along line BB in FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along line BB showing the relationship between the underfloor material and the joint member in response to the movement of the floor panel in the second embodiment. [Figure 11] FIG. 11 is a plan view showing the positional relationship between the floor panel and the joint member in the third embodiment. [Figure 12] FIG. 12 is a cross-sectional view taken along line CC in FIG. [Figure 13] FIG. 13 is a cross-sectional view taken along line CC showing the relationship between the underfloor material and the joint member in response to the movement of the floor panel in the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Note that the embodiment described below is merely an example of how the present invention is realized, and it goes without saying that the embodiment can be modified as appropriate without departing from the spirit and scope of the present invention.

[0024] In the following description, the direction from the start point of an arrow to the end point is expressed as a direction, and the movement on the line connecting the start point and end point of an arrow is expressed as a direction. The directions related to the floor structure 100 are given as a vertical direction 23, a first direction 24, and a second direction 25. The first direction 24 and the second direction 25 are both horizontal directions perpendicular to the vertical direction 23 and perpendicular to each other. The first direction 24 is the direction of the long side of the rectangular outer shape of the floor panel 12, which will be described in detail later. The second direction 25 is the direction of the short side of the rectangular outer shape of the floor panel 12, which will be described in detail later.

[0025] [First embodiment] A floor structure 100 according to a first embodiment of the present invention will be described. The floor structure 100 is a structure used on the upper floors of, for example, a steel-framed building (not shown). As shown in FIGS. 1 to 3, the floor structure 100 includes beams 11, floor panels 12, joint members 13, underfloor materials 14, and screws 15.

[0026] The beams 11 are, for example, steel beams assembled in a lattice pattern. The beams 11 include a plurality of first steel beams 111 extending along the second direction 25 and a plurality of second steel beams (not shown) extending along the first direction 24. The first steel beams 111 and the second steel beams are both H-shaped steel. The first steel beams 111 and the second steel beams are connected to each other or to steel columns by a well-known connecting structure.

[0027] The floor panel 12 is, for example, an ALC (Autoclaved Lightweight Aerated Concrete) panel. As shown in FIG. 4, the floor panel 12 has a rectangular outline in a plan view and a rectangular parallelepiped shape. The floor panel 12 has chamfered end faces 123 at the corners between the top surface 121 and the side surfaces 122. Specifically, the floor panel 12 has chamfered end faces 123 at the corners between the top surface 121 and the side surfaces 122 extending along the long side direction (long sides 127). As shown in FIGS. 1 to 3, the floor panels 12 are positioned adjacent to each other with their long sides facing the first direction 24. Specifically, the floor panels 12 are positioned with their side surfaces 122 adjacent to each other. A plurality of floor panels 12 are positioned along each of the first direction 24 and the second direction 25. The undersides 124 of the floor panels 12 (see FIGS. 1 and 4) are supported by the beams 11. The floor panels 12 located at both ends of the floor panels 12 adjacent in the second direction 25 are supported by, for example, second steel beams.

[0028] As shown in Figures 5 and 6, the joint member 13 is, for example, an angle bar with an L-shaped cross section. The joint member 13 is made of, for example, steel or stainless steel. The joint member 13 has a shape obtained by bending, for example, a plate material with a rectangular outline in a plan view at the center of its short side along the long side. The rigidity of the joint member 13 is greater than the rigidity of the underfloor material 14, which will be described later. Specifically, the amount of out-of-plane deflection that occurs when the underfloor material 14 is subjected to an upward force (shear force) is smaller than the amount of downward compression that occurs when the joint member 13 is subjected to a downward load.

[0029] As shown in Figures 1 to 3, the joint member 13 is located between adjacent floor panels 12. Specifically, the joint member 13 is located between adjacent floor panels 12 in the second direction 25 (hereinafter, one floor panel will be referred to as 12a and the other floor panel as 12b). The length of the joint member 13 in the first direction 24 is shorter than the long sides 127 of the floor panels 12. The joint member 13 is located, for example, near the center of the floor panel 12 in the direction along the long sides 127 of the rectangular outer shape.

[0030] As shown in Figures 6 and 7, the bent corner 131 of the joint member 13 is located on the opposing side surfaces 122a, 122b of the floor panels 12a, 12b, with a downward convexity. The two downward-facing surfaces (first surface 132, second surface 133) are positioned on either side of the corner 131 of the joint member 13, and each abut against the end surfaces 123a, 123b of the floor panel 12, respectively. The joint member 13 is supported by the end surfaces 123 of the adjacent floor panels 12a, 12b. In the second direction 25, the width W1 from the corner 131 to the upper end 134 of the joint member 13 is equal to or smaller than the width W2 of the end surface 123 of the floor panel 12 (W1 <= W2). The bending angle at the corner 131 of the joint member 13 is a right angle or an obtuse angle. As shown in FIG. 3, the joint member 13 is sandwiched between a pair of screws 15, which will be described later, in a direction (second direction 25) intersecting the extension direction (first direction 24) of the joint member 13.

[0031] The underfloor material 14 is a plate having a rectangular outer shape in a plan view. The underfloor material 14 is, for example, particle board. As shown in FIGS. 1 and 3, the outer shape of the underfloor material 14 is larger than that of the floor panels 12. The underfloor material 14 is stacked above the multiple floor panels 12 and joint members 13, and its underside 141 is supported by the multiple floor panels 12 and joint members 13. The underfloor material 14 is arranged so that the long side 127 of the rectangular outer shape of the floor panels 12 and the long side 143 of the rectangular outer shape of the underfloor material 14 are perpendicular to each other. Specifically, the long side 143 of the underfloor material 14 is located, for example, along the second direction 25. The short side 144 of the underfloor material 14 is located, for example, along the first direction 24.

[0032] As shown in Figures 1, 3, and 6, the screws 15 are driven downward from the upper surface 142 of the underfloor material 14. The screws 15 secure the underfloor material 14 to the floor panel 12. The screws 15 are positioned in pairs, sandwiching the joint member 13 in a direction (e.g., second direction 25) intersecting the extension direction (first direction 24) of the joint member 13. One of the pair of screws 15 sandwiching the joint member 13 is positioned away from the joint member 13 to match the distance between the joint member 13 and the other screw 15. Specifically, as shown in Figure 3, the distance R3 from one of the pair of screws 15 sandwiching the joint member 13 to the joint member 13 is equal to the distance R3 from the other of the pair of screws 15 sandwiching the joint member 13 to the joint member 13. The screws 15 include a first screw 151 and a second screw 152.

[0033] The first screws 151 are positioned in a matrix pattern in the horizontal direction. For example, as shown in FIG. 3, multiple first screws 151 are driven in a direction along each side of the rectangular outer shape of the underfloor material 14. For example, the first screws 151 are driven into predetermined positions on the top surface 142 of the underfloor material 14. Specifically, multiple first screws 151 are positioned at regular intervals along the first direction 24 and the second direction 25 in a plan view. For example, the first screws 151 are positioned in six rows along the long side 143 and four columns along the short side 144 in a plan view of the underfloor material 14.

[0034] The second screw 152 is a screw that is driven in addition to the first screw 151. The second screw 152 is driven in accordance with the position of the joint member 13. The second screw 152 is positioned, for example, in a direction intersecting the extension direction (first direction 24) of the joint member 13, closer to the joint member 13 on one side as viewed from the joint member 13 than the distance between the joint member 13 and the first screw 151. That is, the second screw 152 is positioned closer to the joint member 13 on one side as viewed from the joint member 13 in the second direction 25 than the first screw 151. Specifically, as shown in FIG. 3, when viewed from the joint member 13, the distance R1 from the joint member 13 to the first screw 151 on one side in the second direction 25 is greater than the distance R2 from the joint member 13 to the second screw 152 (R1>R2).

[0035] In Fig. 3, the second screw 152 is at least one of two screws 15 positioned on either side of the joint member 13 in the second direction 25. The second screws 152 are positioned in a direction (second direction 25) intersecting the extension direction of the joint member 13 so as to sandwich the joint member 13 as a pair, or to sandwich the joint member 13 between the second screws 152 and the first screws 151. Specifically, as shown in Fig. 3, the joint member 13 is positioned either in a manner where the two second screws 152 sandwich the joint member 13, as shown by the pair of screws 15c, or in a manner where the joint member 13 is sandwiched between one first screw 151 and one second screw 152, as shown by the pair of screws 15d.

[0036] (Movement of the underfloor material 14 and the joint material 13 in response to the sinking of the floor panel 12) Next, we will explain the movement of the underfloor material 14 and the joint member 13 in response to the sinking of the floor panel 12. In Figures 5 to 7, the screws driven into the two adjacent floor panels 12a and 12b are shown as screws 15a and 15b, respectively. As shown in Figure 7, when one floor panel 12a of adjacent floor panels 12a, 12b is displaced so as to sink due to the load, the screw 15a driven into the other floor panel 12a is also displaced downward in accordance with the displacement of the other floor panel 12a. The downward displacement of the screw 15a also displaces the underfloor material 14 in accordance with the displacement of the floor panel 12a. At this time, a force F1 is applied to the underfloor material 14 in a downward direction from the screw 15a.

[0037] The joint member 13 receives a downward load (force f0) from the undersurface 141 of the underfloor material 14, which is attempting to move together with one of the floor panels 12a. Specifically, the joint member 13 receives a downward load (force f0) from the undersurface 141 of the underfloor material 14 at the upper end 134 that protrudes toward the one of the floor panels 12a in the second direction 25. Because the corner 131 of the joint member 13 is an angled bar having a right angle or an obtuse angle, the load (force f0) acting on the upper end 134 of the joint member 13 is divided into a component force f1 in a direction along the first surface 132 and a component force f2 in a direction perpendicular to the panel surface, as shown in FIG. 7 . The component force f1 is equal to or greater than the component force f2 (f1 >= f2). The component force f1 creates a frictional force between the end surface 123b and the joint member 13. Furthermore, the upper end 134 of the joint member 13 comes into contact with the lower surface 141 of the underfloor material 14, so that the joint member 13 does not move while in contact with the end surface 123b.

[0038] Meanwhile, the first surface 132 of the joint member 13 is released from contact with one end surface 123a of the adjacent floor panel 12a. The underfloor material 14 bends downward, starting from an upper end 134 of the joint member 13 that is in contact with the underfloor material 14 and that protrudes toward one floor panel 12a in the second direction 25. At this time, an upward force F2 is applied from the joint member 13 to the underfloor material 14 at the position of the upper end 134 that is the starting point of the bending.

[0039] Because the rigidity of the joint member 13 is greater than the rigidity of the underfloor material 14, the deformation of the joint member 13 is small relative to the deformation of the underfloor material 14. Specifically, the amount of out-of-plane deflection caused by the underfloor material 14 deflecting when subjected to an upward force F2 (shear force) is smaller than the amount of downward compression caused by the joint member 13 when subjected to a downward load (force f0). Therefore, the second surface 133 of the joint member 13 does not deform and remains in contact with the end surface 123b of the other floor panel 12b.

[0040] Because the joint member 13 is located between the adjacent floor panels 12a and 12b, the length L1 of the bending section of the underfloor material 14 is the difference between the distance A from the screw 15a to the side surface 122a and the length C from the position of the side surface 122 in the second direction 25 to the upper end 134 of the joint member 13 protruding to one side of the floor panel 12. In contrast, if the joint member 13 were not present, the upper end 126 of the end surface 123b of the other floor panel 12b would be closest to the one floor panel 12a and would be in contact with the lower surface 141 of the underfloor material 14. The underfloor material 14 bends downward from the upper end 126 of the end surface 123 of the other floor panel 12b. Therefore, the length L2 of the bending section of the underfloor material 14 is the sum of the distance A from the screw 15a to the side surface 122a and the length C from the position of the side surface 122a in the second direction 25 to the upper end 126 of the floor panel 12b.

[0041] The rigidity of the underfloor material 14 against out-of-plane deflection is inversely proportional to the cube of the length of the deflected section of the underfloor material 14. Therefore, the shorter the deflected section, the higher the rigidity of the underfloor material 14 against out-of-plane deflection. The positioning of the joint member 13 increases the rigidity of the underfloor material 14 against out-of-plane deflection, thereby improving the compliance of the floor panels 12a, 12b with each other. The improved compliance of the floor panels 12a, 12b with each other improves the floor vibration linkage effect. Here, the floor vibration linkage effect refers to the suppression of floor vibration by adjacent floor panels 12 vibrating in phase and with reduced acceleration compared to when a single floor panel 12 vibrates in response to a load.

[0042] (Construction method of floor structure 100) 2, the multiple floor panels 12 are arranged in a first direction 24 and a second direction 25 with the long sides 127 of the rectangular outer shape facing the first direction 24. The multiple floor panels 12 are arranged overlapping a first steel beam 111 extending along the second direction 25 and a second steel beam extending along the first direction 24.

[0043] The joint member 13 is arranged between adjacent floor panels 12 with its longitudinal direction facing the first direction 24. The joint member 13 is arranged along a long side 127 of the rectangular outer shape of the floor panel 12 in a plan view that extends in the first direction 24. The joint member 13 is arranged near the center of the long side 127 of the rectangle of the floor panel 12 in a plan view.

[0044] As shown in FIG. 3 , the underfloor material 14 is placed from above the floor panel 12 and the joint member 13. The underfloor material 14 is placed with the long side 127 of its rectangular outline in a plan view aligned along the second direction 25. The underfloor material 14 is placed, for example, with the short sides 144 of adjacent underfloor materials 14 in the first direction 24 shifted alternately in the second direction 25. The short sides 144 of the rectangular outline of the underfloor material 14 in a plan view are placed in a position that does not overlap the joint member 13 in the up-down direction 23. In other words, the undersurface 141 of the underfloor material 14 is placed so as to abut against the upper end 134 of the joint member 13.

[0045] As shown in FIG. 6, the first screws 151 are driven from the top surface 142 of the underfloor material 14. The first screws 151 are driven in a matrix at predetermined positions to match the rectangular outline of the underfloor material 14 in a plan view (see FIG. 3). The second screws 152 are driven in addition to the first screws 151 to match the positions of the joint members 13. The second screws 152 are driven closer to the joint members 13 in the second direction 25 than the first screws 151. The second screws 152 may be driven in pairs with the joint member 13 between them, or one screw may be driven between the second screws 152 and the first screws 151 to sandwich the joint member 13. When driven in pairs, the second screws 152 are driven in pairs at equal distances with the joint member 13 between them, for example, along the second direction 25. When one second screw 152 is driven, the second screw 152 is driven, for example, along the second direction 25, at a distance equal to the distance from the nearest joint member 13 to the first screw 151 as viewed from the joint member 13. By driving the first screw 151 and the second screw 152, the floor structure 100 is formed.

[0046] (Operation and effect of the first embodiment) When subjected to vibration due to the load, the floor panel 12a is displaced downward relative to the horizontally adjacent floor panel 12b. The downwardly displaced floor panel 12a applies a downward force f0 to the subfloor material 14 via the screw 15a. The joint member 13 applies an upward force F2 to the subfloor material 14, which is deformed by the force of the screw 15a. A shear force due to forces f0 and F2 is generated between the screw 15a and the joint member 13 in the subfloor material 14. The position at which the upward force F2 is applied is closer to the screw 15a driven into the floor panel 12a than the position at which the upward force F2 is applied by the adjacent floor panel 12b if the joint member 13 is not present. The closer the positions of the two forces f0 and F2 are, the greater the rigidity of the subfloor material 14 against out-of-plane deflection, and the smaller the deflection of the subfloor material 14. This improves the vibration linkage effect between the adjacent floor panels 12a and 12b. By improving the vibration linkage effect, vibration of the entire floor structure 100 can be suppressed.

[0047] By abutting the joint members 13 against the end faces 123 of the adjacent floor panels 12a, 12b, the effect of linked vibration can be improved regardless of whether a load is applied to either of the adjacent floor panels 12a, 12b. The improved effect of linked vibration can suppress vibration.

[0048] The joint member 13 can be positioned at a position where displacement is relatively large on the floor panel 12. Since vibrations at positions where displacement is large can be suppressed, the vibration linkage effect can be improved and vibrations can be suppressed.

[0049] When subjected to vibrations caused by the load, floor panel 12a is displaced so that it sinks downward relative to horizontally adjacent floor panel 12b. The downwardly displacing floor panel 12 applies a downward force F1 to the underfloor material 14 via the screw 15a. The joint member 13 applies an upward force F2 to the underfloor material 14, which is deformed by the force of the screw 15a. Shear forces due to forces f0 and F2 occur between the screw 15a in the underfloor material 14 and the joint member 13. By positioning the second screw 152 in addition to the first screw 151, the distance between the joint member 13 and the screw 15 is shorter than when only the first screw 151 is present. The shorter distance reduces the out-of-plane deflection of the underfloor material 14, improving the floor vibration linkage effect and suppressing vibration.

[0050] Since the joint member 13 is fixed to the floor panel 12 by a pair of screws 15 sandwiching the joint member 13, even if one of the adjacent floor panels 12a, 12b is displaced so as to sink, the floor vibration interlocking effect is improved and vibration can be suppressed.

[0051] (Modification of the first embodiment) In the above embodiment, the joint member 13 is located near the center of the floor panel 12 in the direction along the long side 127 of the rectangular outer shape, but this is not limited to this. The joint member 13 may be located closer to the edge than the center. Multiple joint members 13 may be located along the long side 127 of the rectangular outer shape of the floor panel 12. The joint members 13 may have a length that matches the length of the long side 127 of the rectangular outer shape of the floor panel 12. The end surface 123 of the floor panel 12 may also be located at the position of the short side 128 of the rectangular outer shape of the floor panel 12 (see Figure 1). The joint member 13 may also be located at the position of the short side of the rectangular outer shape of the floor panel 12. In this case, the short side 128 of the rectangular outer shape of the floor panel 12 in a plan view is chamfered to form an end surface similar to the end surface 123 (see Figures 1 to 4).

[0052] In the above embodiment, the joint member 13 is made of steel or stainless steel, but is not limited thereto. The joint member 13 may be made of other metals or an elastic material such as rubber. In the above embodiment, the joint member 13 is greater in rigidity than the underfloor material 14, but is not limited thereto. The joint member 13 only needs to have the strength (toughness) to withstand the force f0 applied from the underfloor material 14. Even if the joint member 13 is compressed by the force f0 to a degree greater than the deflection of the underfloor material 14, the position of the upper end 134 of the joint member 13 is closer to the screw 15a than the position of the upper end 126 of the end face 123b of the other floor panel 12b. The length L1 of the deflected section of the underfloor material 14 is shorter than the length L2 from the screw 15a to the upper end of the end face 123b of the floor panel 12. Therefore, the rigidity of the underfloor material 14 against out-of-plane deflection is increased, improving the compliance of the floor panels 12 with each other.

[0053] In the above embodiment, the long side 127 of the rectangular outer shape of the floor panel 12 and the long side 143 of the rectangular outer shape of the underfloor material 14 are perpendicular to each other, but this is not limited to this. The long side 127 of the rectangular outer shape of the floor panel 12 and the long side 143 of the rectangular outer shape of the underfloor material 14 may also be parallel to each other.

[0054] [Second embodiment] In the second embodiment, as shown in Figs. 8 and 9, a joint member 13 that is a rod will be described instead of the joint member 13 that is an angle material. The joint member 13 is made of, for example, steel or stainless steel. The joint member 13 is a rod with a triangular cross-section. Each corner of the triangular cross-section of the joint member 13 is chamfered. The outer surface of the joint member 13 in a direction intersecting the longitudinal direction is composed of a first surface 135, a second surface 136, and a third surface 137 that extend in the longitudinal direction and have a rectangular outer shape in a plan view. The rigidity of the joint member 13 is greater than the rigidity of the underfloor material 14. Specifically, the amount of out-of-plane deflection that occurs when the underfloor material 14 is subjected to an upward force (shear force) is smaller than the amount of downward compression that occurs when the joint member 13 is subjected to a downward load.

[0055] As shown in FIG. 8, the joint member 13 is positioned with its longitudinal direction aligned along the long side 127 of the rectangular outer shape of the floor panel 12. As shown in FIG. 9, the first surface 135 of the joint member 13 abuts against the end surface 123a of one floor panel 12a. The second surface 136 of the joint member 13 is adjacent to the first surface 135 in the circumferential direction of the joint member 13. The second surface 136 of the joint member 13 abuts against the end surface 123b of the other floor panel 12b. The angle between the first surface 135 and the second surface 136 is the same as the angle between the end surfaces 123a, 123b of the adjacent floor panels 12a, 12b. The angle between the first surface 135 and the second surface 136 is, for example, an obtuse angle. The width W3 of the first surface 135 is equal to or smaller than the width W4 of the end surface 123a of one floor panel 12a (W3<=W4). The width W5 of the second surface 136 is equal to or smaller than the width W6 of the end surface 123b of the other floor panel 12b (W5<=W6).

[0056] The third surface 137 of the joint member 13 is adjacent to the first surface 135 and the second surface 136 on the outer periphery of the joint member 13. The third surface 137 of the joint member 13 faces upward and faces the undersurface 141 of the underfloor material 14. The third surface 137 of the joint member 13 abuts against the undersurface 141 of the underfloor material 14.

[0057] (Movement of the underfloor material 14 and the joint material 13 in response to the sinking of the floor panel 12) Next, the movement of the underfloor material 14 and the joint member 13 in response to the sinking of the floor panel 12 will be described. As shown in Figure 10, when one of the adjacent floor panels 12a, 12b is displaced so as to sink due to the load, the screw 15a driven into one of the floor panels 12a is also displaced downward in accordance with the displacement of the other floor panel 12a. The downward displacement of the screw 15a also displaces the underfloor material 14 in accordance with the displacement of the floor panel 12a. At this time, a force F1 is applied to the underfloor material 14 in a downward direction from the screw 15a.

[0058] The joint member 13 receives a downward load from the undersurface 141 of the underfloor material 14, which is attempting to move together with one of the floor panels 12a. Specifically, the joint member 13 receives a downward load from the undersurface 141 of the underfloor material 14 at the upper end 134 that protrudes toward the one of the floor panels 12a in the second direction 25. Because the angle between the first surface 135 and the second surface 136 of the joint member 13 is a right angle or an obtuse angle, the load (force f0) acting on the joint member 13 is divided into a component force f1 in a direction along the first surface 135 and a component force f2 in a direction perpendicular to the plate surface of the first surface 135, as shown in FIG. 10 . The component force f1 is equal to or greater than the component force f2 (f1 >= f2). The component force f1 generates a frictional force between the end surface 123b and the joint member 13 (second surface 136). Furthermore, the upper end 134 of the joint member 13 comes into contact with the lower surface 141 of the underfloor material 14, so that the joint member 13 does not move while in contact with the end surface 123b.

[0059] Meanwhile, the first surface 135 of the joint member 13 is released from contact with one end surface 123a of the adjacent floor panel 12a. The underfloor material 14 bends downward, starting from an upper end 134 of the joint member 13 that is in contact with the underfloor material 14 and that protrudes toward one of the floor panels 12 in the second direction 25. At this time, an upward force F2 is applied from the joint member 13 to the underfloor material 14 at the position of the upper end 134 that is the starting point of the bending.

[0060] Because the rigidity of the joint member 13 is greater than the rigidity of the underfloor material 14, the deformation of the joint member 13 is small relative to the deformation of the underfloor material 14. Specifically, the amount of out-of-plane deflection caused by the underfloor material 14 deflecting when subjected to an upward force F2 (shear force) is smaller than the amount of downward compression caused by the joint member 13 when subjected to a downward load (force f0). Therefore, the second surface 136 of the joint member 13 is maintained in contact with the end surface 123b of the other floor panel 12b without being deformed.

[0061] Because the joint member 13 is located between the adjacent floor panels 12a and 12b, the length L1 of the deflected section of the underfloor material 14 is the difference between the distance A from the screw 15a to the side surface 122 and the length C from the position of the side surface 122 in the second direction 25 to the edge of the third surface 137 of the joint member 13 on the side of one floor panel 12a. On the other hand, if the joint member 13 were not present, the upper end 126 of the end surface 123b of the other floor panel 12b would be closest to the one floor panel 12a and would be in contact with the lower surface 141 of the joint member 13. Therefore, the underfloor material 14 deflects downward from the upper end of the end surface 123b of the other floor panel 12b. Therefore, the length L2 of the deflected section of the underfloor material 14 is the sum of the distance A from the screw 15a to the side surface 122 in the second direction 25 and the length C from the position of the side surface 122 to the upper end of the end surface 123b of the floor panel 12.

[0062] The rigidity of the underfloor material 14 against out-of-plane deflection is inversely proportional to the cube of the length of the deflected section of the underfloor material 14. Therefore, the shorter the deflected section, the higher the rigidity of the underfloor material 14 against out-of-plane deflection. The location of the joint member 13 increases the rigidity of the underfloor material 14 against out-of-plane deflection, improving the ability of the floor panels 12 to follow each other.

[0063] (Operation and effect of the second embodiment) By forming the joint member 13 into a rod body, the strength of the joint member 13 against deformation can be improved compared to angle iron made of the same material.

[0064] (Modification of the second embodiment) In the above-described embodiment, the joint member 13 is made of steel or stainless steel, but is not limited thereto. The joint member 13 may be made of other metals or an elastic body such as rubber. In the above-described embodiment, the joint member 13 is made to be larger than the rigidity of the floor underlayment 14, but is not limited thereto. The joint member 13 only needs to have a strength (toughness) that is not broken with respect to the force f0 received from the floor underlayment 14.

[0065] [Third Embodiment] In the third embodiment, as shown in FIGS. 11 and 12, instead of the joint member 13 which is an angle member, a joint member 13 wound in a spiral shape is described. As shown in FIG. 11, the joint member 13 has a structure in which a strip made of steel or stainless steel is wound in a spiral shape. As shown in FIG. 12, the joint member 13 is, for example, elliptical in cross-section. The rigidity of the joint member 13 is larger than the rigidity of the floor underlayment 14. Specifically, with respect to the amount of deflection of out-of-plane deflection in which the floor underlayment 14 is deflected by receiving an upward force (shearing force), it is smaller than the amount of compression in which the joint member 13 is compressed downward by receiving a downward load.

[0066] The joint member 13 is positioned along the longitudinal direction along the long side 127 of the rectangular outer shape in the floor panel 12. In the joint member 13, the direction perpendicular to the rotation surface of the strip is the longitudinal direction of the joint member 13. In a side view of the joint member 13, the major diameter r1 of the elliptical cross-section shape, for example, extends along the horizontal direction of the pair of floor panels 12. The length of the major diameter r1 is smaller than the separation distance between the upper surfaces 121 of the adjacent floor panels 12 (r1 < d1). The minor diameter r2 of the elliptical cross-section shape extends along the vertical direction 23. The length of the minor diameter r2 is smaller than the length d2 of the vertical direction 23 of the end surface 123 (r2 < d2). The outer surface of the joint member 13 abuts against the respective end surfaces 123a, 123b of the two floor panels 12a, 12b and also abuts against the lower surface 141 of the floor underlayment 14.

[0067] (Movements of the floor underlayment 14 and the joint member 13 with respect to the sinking of the floor panel 12) As shown in Figure 13, when one of the adjacent floor panels 12a, 12b is displaced so as to sink due to the load, the screw 15a driven into one of the floor panels 12a is also displaced downward in accordance with the displacement of the other floor panel 12a. The downward displacement of the screw 15a also displaces the underfloor material 14 in accordance with the displacement of the floor panel 12a. At this time, a force F1 is applied to the underfloor material 14 in a downward direction from the screw 15a.

[0068] The joint member 13 receives a downward load from the undersurface 141 of the underfloor material 14, which is attempting to move together with one of the floor panels 12a. Specifically, the joint member 13 receives a downward load from the upper end 134, which abuts against the undersurface 141 of the underfloor material 14. The joint member 13 receives a downward external force from the upper end 134. That is, the upper end 134 of the joint member 13 applies an upward force F2 to the undersurface 141 of the underfloor material 14. Because the rigidity of the joint member 13 is greater than the rigidity of the underfloor material 14, the joint member 13 does not deform in response to deformation of the underfloor material 14. Furthermore, because the upper end 134 of the joint member 13 comes into contact with the undersurface 141 of the underfloor material 14, the joint member 13 does not move while in contact with the end face 123b. The joint member 13 remains in contact with the end surface 123b of the other floor panel 12b without changing its shape. Meanwhile, the joint member 13 is released from contact with one end surface 123a of the adjacent floor panel 12a.

[0069] The length L1 of the bending section of the underfloor material 14 is equal to the length A from the screw 15 to the side surface 122 (the length from the screw 15 to the top end of the joint member 13). On the other hand, if the joint member 13 is not positioned, the upper end 126 of the end surface 123b of the other floor panel 12b is closest to the one floor panel 12a and is in contact with the lower surface 141 of the joint member 13. Therefore, the underfloor material 14 bends downward from the upper end 126 of the end surface 123 of the other floor panel 12 as a starting point. Therefore, the length L2 of the bending section of the underfloor material 14 is the sum of the distance A from the screw 15a to the side surface 122 in the second direction 25 and the distance C from the position of the side surface 122 to the top end of the end surface 123b of the floor panel 12b.

[0070] The rigidity of the underfloor material 14 against out-of-plane deflection is inversely proportional to the cube of the length of the deflected section of the underfloor material 14. Therefore, the shorter the deflected section, the higher the rigidity of the underfloor material 14 against out-of-plane deflection. The location of the joint member 13 increases the rigidity of the underfloor material 14 against out-of-plane deflection, improving the ability of the floor panels 12 to follow each other.

[0071] (Operation and effect of the third embodiment) Even if there is a dimensional error in the angle or the like between the end faces 123a, 123b of the adjacent floor panels 12a, 12b, the error can be absorbed by the joint member 13, making it easy to position the joint member 13. This makes it easier to construct the floor structure 100.

[0072] (Modification of the third embodiment) The joint member 13 may be configured to have a circular cross section. During installation, the joint member 13 may be deformed into an elliptical cross section by being pressed against the end surface 123 of the floor panel 12 by the underfloor material 14. This reduces the precision required for the joint member 13, making it easier to manufacture.

[0073] The joint member 13 is made of steel or stainless steel, but is not limited to this. The joint member 13 may be made of other metals or an elastic material such as rubber. In the above embodiment, the joint member 13 is greater in rigidity than the underfloor material 14, but is not limited to this. The joint member 13 only needs to have strength (toughness) that will not break when subjected to a force from the underfloor material 14. [Explanation of symbols]

[0074] 11 Beam 12 Floor Panels 13 Joint materials 14 Underfloor materials 15 bis 100 floor structure 121 Top surface 122 Side 123 End face 151 First Vis 152 2nd Vis

Claims

1. Beams and A plurality of floor panels supported by the beams, each having a chamfered end face at a corner between its top surface and side surface, the side surfaces of which are positioned opposite each other; a joint member supported on the end surface of the adjacent floor panel; a floor underlayment supported on the upper surfaces of the plurality of floor panels and the joint members; and screws for fixing the underfloor material to the floor panel, The joint members are angle members that abut against the end faces, A floor structure in which the two upper ends of the angle members each abut against the underside of the floor base material.

2. A beam, A plurality of floor panels supported by the beams, each having a chamfered end face at a corner between its top surface and side surface, the side surfaces of which are positioned opposite each other; a joint member supported on the end surface of the adjacent floor panel; a floor underlayment supported on the upper surfaces of the plurality of floor panels and the joint members; and screws for fixing the underfloor material to the floor panel, The joint member is a rod having a triangular cross section and an outer surface that abuts against the end surface and the underfloor material, The rod body is made of metal or an elastic body having a rigidity greater than that of the underfloor material, and is not joined to the floor panel or the underfloor material.

3. A beam, A plurality of floor panels supported by the beams, each having a chamfered end face at a corner between its top surface and side surface, the side surfaces of which are positioned opposite each other; a joint member supported on the end surface of the adjacent floor panel; a floor underlayment supported on the upper surfaces of the plurality of floor panels and the joint members; and screws for fixing the underfloor material to the floor panel, The floor structure in which the joint member is a band material wound spirally.

4. The floor panel has a rectangular outer shape in a plan view, The end surface extends along a long side of the rectangle, 4. The floor structure according to claim 1, wherein the joint member is located near the center of the end surface in the direction along the long side.

5. The floor underlayment has a rectangular outer shape in a plan view and is larger than the floor panel, 5. The floor structure according to claim 4, wherein the underfloor material is arranged so that the long sides of the rectangle of the floor panel and the long sides of the rectangle of the underfloor material are perpendicular to each other.

6. Beams and A plurality of floor panels supported by the beams, each having a chamfered end face at a corner between its top surface and side surface, the side surfaces of which are positioned opposite each other; a joint member extending along the side surface of the adjacent floor panel and supported on the end surface; a floor underlayment supported on the upper surfaces of the plurality of floor panels and the joint members; and screws for fixing the underfloor material to the floor panel, The above screws are First screws arranged in a matrix in the horizontal direction; A floor structure comprising a second screw that is in a direction intersecting the extension direction of the joint member and that is closer to the joint member on one side as viewed from the joint member than the distance between the joint member and the first screw.

7. The joint member is sandwiched between the pair of screws in a direction intersecting the extension direction of the joint member, 7. The floor structure according to claim 6, wherein one of the pair of screws is positioned at a distance from the joint member that matches the distance between the joint member and the other of the screws.

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