JP6664950B2 - Floor structure - Google Patents

Description

  The present invention relates to a floor structure.

  BACKGROUND ART Conventionally, a floor structure including a base, a floor member disposed on the base, and a connecting member that connects the floor member to the base has been known (see Patent Document 1). Patent Literature 1 discloses a floor structure in which a steel beam and a deck plate are connected by metal screws (see FIG. 5 and the like of Patent Literature 1).

JP 08-209837 A

  In the floor structure, since the base and the floor material are connected by the connecting member, for example, a displacement of the floor material can be suppressed at the time of an earthquake or the like. However, in a floor structure having a structure in which a base and a floor member are connected by a connecting member, vibration based on an impact on the floor member is easily transmitted to the base via the connecting member. That is, there is still room for improvement from the viewpoint of suppressing vibration transmission based on the connecting member that connects the base and the flooring material.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a floor structure that can suitably suppress vibration transmission based on a connecting member that connects a base and a floor material. .

  A floor structure that solves the above-mentioned problem is a floor structure including a base, a floor member disposed on the base, and a connecting member that connects the base and the floor member, The member has a buried portion buried in the floor material, and includes a buried portion buffer member disposed between the upper surface and side surfaces of the buried portion and the floor material.

According to this configuration, the transmission of vibration from the floor material to the embedded portion of the connecting member is suppressed by the embedded portion buffer member.
It is preferable that the floor structure further includes a floor cushioning member that supports the floor between the base and the floor.

According to this configuration, vibration transmission from the floor material to the base is suppressed by the floor material buffer member.
In the floor structure, the floor material has a concave portion and a convex portion facing the base, and the connecting member is provided so as to connect the base and the convex portion of the floor material, and It is preferable that the material cushioning member includes a projection cushioning member disposed between the base and the projection of the flooring material.

According to this configuration, the transmission of vibration from the protrusion of the flooring material to the base is suppressed by the protrusion buffer member.
In the floor structure, the floor material has a concave portion and a convex portion facing the base, and the connecting member is provided so as to connect the base and the convex portion of the floor material, and Preferably, the material cushioning member includes a recess cushioning member disposed between the base and the recess of the flooring.

According to this configuration, the transmission of vibration from the concave portion of the floor material to the base is suppressed by the concave portion cushioning member.
In the floor structure, the cushioning member for a concave portion is formed of a rubber-based material, and the floor structure further includes a thickness adjustment member formed of a hard material harder than the rubber-based material, It is preferable that the member is laminated on the recess cushioning member between the base and the recess of the floor material.

  In the floor structure, when suppressing the vibration of the floor material and the transmission of the vibration to the base on which the floor material is placed, the performance of the floor material buffer member is improved by setting the thickness of the floor material buffer member to be larger. It will be easier to demonstrate. However, setting the thickness of the cushioning member for flooring to be larger is, for example, setting the height of the building to be larger, or when the height of the building is limited, the floor to the ceiling may be used. Or a smaller height dimension. That is, when a floor cushioning member is provided in the floor structure, it is difficult to adjust the thickness of the floor cushioning member.

  In this regard, since the floor structure has a configuration in which the buffer member for the concave portion is arranged using the space between the base and the concave portion of the floor material, the thickness of the buffer member for the concave portion is set to be larger. Also, it is possible to keep the height position of the floor material constant with respect to the base.

  Here, if the thickness of the buffer member for concave portions is excessively large, the function of supporting the floor material by the buffer member for concave portions may be reduced. In this regard, in the floor structure, since the cushioning member for the concave portion and the thickness adjusting member made of the hard material are laminated, the thickness of the cushioning member for the concave portion and the thickness of the thickness adjusting member are adjusted. By doing so, it is possible to prevent the buffer member for concave portions from becoming excessively thick.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration transmission based on the connection member which connects a base and a flooring material can be suppressed suitably.

It is a partial front view showing the floor structure of an embodiment. It is an exploded perspective view showing a part of floor structure. It is a partial plan view showing a floor structure. It is a half sectional view showing a part of floor structure. It is a half sectional view showing a modification of a floor structure. It is a half sectional view showing a modification of a floor structure.

Hereinafter, an embodiment of a floor structure will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the floor structure 11 includes a base 21, a floor member 31 disposed on the base 21, and a connecting member 41 connecting the base 21 and the floor member 31. ing.

  As shown in FIG. 3, the base 21 of the present embodiment includes a plurality of beam members 22. The beam member 22 is made of metal and has, for example, an I-shaped cross section. The base 21 has a frame structure, and a communication portion 21a that communicates vertically is formed by the frame structure. The base 21 is provided to form a floor of a room of two or more floors in a building.

  As shown in FIG. 1, the floor material 31 has a concave portion 31 a and a convex portion 31 b facing the base 21. As shown in FIG. 2, the floor member 31 includes a concrete floor main body 32 and a metal deck plate 33 laminated on the lower surface of the floor main body 32. In the floor main body 32, a welding wire mesh, deformed reinforcing steel, or the like is embedded as necessary. As the deck plate 33, for example, a plate defined in JIS G3352 is used.

  As shown in FIG. 3, the floor member 31 is arranged so as to cover the opening of the communication portion 21 a in the base 21. A space is formed below the floor material 31 arranged as described above. In the present embodiment, a plurality of floor materials 31 are used, and a floor surface is formed by laying down the plurality of floor materials 31. To describe each floor material 31 in detail, the shape of each floor material 31 is rectangular in plan view, and each floor material 31 has a pair of concave portions 31a extending in the longitudinal direction. Each recess 31a is formed to be parallel to each other. As shown in FIG. 1, when the thickness T2 of the floor material 31 is 100%, the thickness T1 of the inner deep portion of each recess 31 a in each floor material 31 is, for example, in a range of 20% or more and 80% or less. Is set to

  As shown in FIG. 1, the connecting member 41 is provided so as to connect the base 21 (the beam member 22) and the convex portion 31 b of the flooring material 31. As shown in FIG. 4, the connecting member 41 has a buried portion 41 a buried in the floor material 31. More specifically, the connecting member 41 includes a first nut 42 embedded in the floor material 31, a stud bolt 43 screwed to the first nut 42, and a second nut 44 screwed to the stud bolt 43. Have.

  The first nut 42 has an outer peripheral surface including an upper surface 42a and a side surface 42b, and has a closed cylindrical shape having an opening at a lower end. The first nut 42 has a flange portion at a lower end, and the upper surface 42a of the flange portion and the side surface 42b of the flange also constitute the outer peripheral surface of the first nut 42.

  The stud bolt 43 is disposed so as to pass through the through hole 22 a of the beam member 22 and the through hole 33 a of the deck plate 33. The base 21 and the floor member 31 are connected to each other by screwing a second nut 44 into the stud bolt 43 from below the beam member 22. The connecting member 41 is preferably made of metal.

  As shown in FIG. 4, the floor structure 11 includes an embedded portion buffer member 51 disposed between the upper surface 42 a and the side surface 42 b of the embedded portion 41 a of the connection member 41 and the floor material 31. The buried portion buffer member 51 is made of, for example, a soft material that is softer than the connecting member 41 (the buried portion 41a). Examples of a material forming the embedded portion buffer member 51 include a rubber-based material and a soft resin-based material. The buried portion buffer member 51 has a cylindrical shape into which the first nut 42 is inserted.

  As shown in FIGS. 1 and 2, the floor structure 11 further includes a floor cushioning member 61 that supports the floor 31 between the base 21 and the floor 31. The floor cushioning member 61 is disposed between the base 21 and the projection 31 b of the floor 31, and between the base 21 and the recess 31 a of the floor 31. And a buffer member 63 for a concave portion.

  As shown in FIG. 4, the protrusion buffer member 62 has a through hole 62 a through which the stud bolt 43 of the connecting member 41 is inserted. The protrusion buffer member 62 is arranged in contact with the stud bolt 43. In addition, the protrusion buffer member 62 is in contact with the upper surface of the base 21 and the lower surface of the floor material 31.

  As shown in FIG. 1, the buffer member 63 for a concave portion has a lower surface S22 that is disposed so as to overlap a base surface S21 that is the upper surface of the base 21. The lower surface S22 of the buffer member 63 for a concave portion protrudes from the concave portion 31a of the floor material 31, and the upper surface S32 of the buffer member 63 for a concave portion is located inside the concave portion 31a of the floor material 31.

The buffer member 62 for the convex portion and the buffer member 63 for the concave portion are made of, for example, a rubber material softer than the base 21.
The Asker A hardness of the rubber material is preferably in a range of 30 or more and 80 or less at 23 ° C., more preferably 40 or more and 70 or less, and still more preferably 45 or more and 60 or less. . When the Asker A hardness is in the range of 30 or more and 80 or less, the effect of suppressing the transmission of vibration from the floor material 31 to the base 21 can be enhanced. When the Asker A hardness is 40 or more, it is possible to prevent the floor material 31 from sinking when a load is applied from above the floor material 31. On the other hand, when the Asker A hardness is 70 or less, the effect of suppressing the transmission of vibration from the floor material 31 to the base 21 can be further enhanced.

  Examples of the rubber-based material include natural rubber, polyisoprene rubber, styrene-butadiene rubber, polybutadiene rubber, nitrile rubber, butyl rubber, ethylene propylene rubber, urethane rubber, and silicone rubber. One type of rubber-based material may be used, or two or more types may be used. The rubber-based material may contain additives such as a reinforcing material such as a filler and an antioxidant.

  The floor structure 11 further includes a thickness adjusting member 71. The thickness adjusting member 71 is made of a hard material that is harder than the rubber-based material that forms the cushioning member 63 for a concave portion. The thickness adjusting member 71 is stacked on the recess cushioning member 63 between the base 21 and the recess 31 a of the floor material 31. The thickness adjusting member 71 has an upper surface S12 that is disposed so as to overlap the inner deep surface S11 of the concave portion 31a in the flooring material 31.

  When the inner surface S11 of the concave portion 31a in the floor material 31 has the rib R as in the present embodiment, the upper surface S12 of the thickness adjusting member 71 supports the inner surface S11 located on both sides of the rib R. It is preferable that the upper surface S12 and the upper surface S12 are separated from each other.

  The lower surface S31 of the thickness adjusting member 71 is arranged so as to overlap the upper surface S32 of the buffer member 63 for a concave portion. Examples of the material forming the thickness adjusting member 71 include a resin material, wood, and a woody material. Examples of the resin material include polyvinyl chloride, polyethylene, polypropylene, polyester, polystyrene, polyamide, and ABS resin. The resin material may contain a reinforcing material such as a filler and an additive such as an antioxidant.

  The thickness T3 of the buffer member 63 for concave portions is preferably 15% or more, more preferably 30%, when the total thickness T4 of the buffer member 63 for concave portions and the thickness adjusting member 71 is 100%. That is all. The effect of suppressing the transmission of vibration from the flooring material 31 to the base 21 can be enhanced as the thickness T3 of the concave cushioning member 63 increases. When the total thickness T4 is 100%, the thickness T3 of the recess cushioning member 63 is preferably 60% or less, more preferably 50% or less. As the thickness T3 of the recess cushioning member 63 is reduced, the sinking of the floor material 31 when a load is applied from above the floor material 31 can be suppressed. Note that the thickness T3 of the buffer member 63 for concave portions and the total thickness T4 described above refer to a thickness dimension in a state where no load is applied before the floor material 31 is placed.

  In the floor structure 11 described above, for example, the floor material 31 in which the embedded portion 41a (first nut 42) of the connecting member 41 and the buffer member 51 for the embedded portion are embedded is formed in advance, and the floor material 31 is connected to the base 21. It is formed by doing. In the floor structure 11, the floor body 32 may be formed on the deck plate 33 after the base 21 and the deck plate 33 are connected in advance by the connecting member 41.

Next, main operations of the floor structure 11 will be described.
On the floor surface of the floor structure 11 (the upper surface of the floor material 31), a floor finishing material not shown is arranged. Examples of floor finishing materials include flooring, cork boards, tiles, tatami mats, carpets, resin sheet materials, and rubber sheet materials. Below the floor structure 11, a ceiling member of a lower floor not shown is provided. The floor structure 11 is applied to a multi-layer house such as an apartment house or a private house or various multi-layer facilities.

  The floor structure 11 described above includes a buried portion buffer member 51 disposed between the upper surface 42 a and the side surface 42 b of the buried portion 41 a of the connecting member 41 and the floor material 31. According to this configuration, vibration transmission from the floor material 31 to the embedded portion 41a of the connecting member 41 is suppressed by the embedded portion buffer member 51.

The operation and effect exhibited by the above-described embodiment will be described below.
(1) The floor structure 11 includes a base 21, a floor member 31 arranged on the base 21, and a connecting member 41 connecting the base 21 and the floor member 31. The connecting member 41 has a buried portion 41 a buried in the floor material 31. The floor structure 11 includes a buried-portion cushioning member 51 disposed between the upper surface 42a and the side surface 42b of the buried portion 41a and the floor material 31. According to this configuration, since the above-described operation is obtained, vibration transmission based on the connecting member 41 that connects the base 21 and the floor member 31 can be suitably suppressed. Therefore, noise below the floor structure 11 can be suppressed. The connecting member 41 that connects the base 21 and the floor member 31 easily becomes, for example, a transmission path for transmitting the light floor impact sound from the floor member 31 to the base 21. This is advantageous.

  (2) The floor structure 11 further includes a floor cushioning member 61 that supports the floor 31 between the base 21 and the floor 31. In this case, vibration transmission from the floor material 31 to the base 21 is suppressed by the floor material cushioning member 61. Therefore, noise below the floor structure 11 can be suppressed. Between the base 21 and the floor material 31, for example, it is easy to become a transmission path for transmitting the heavy floor impact sound from the floor material 31 to the base 21, so the above configuration is advantageous in suppressing such heavy floor impact sound. Become.

  (3) The floor material 31 has a concave portion 31a and a convex portion 31b facing the base 21. The connecting member 41 is provided so as to connect the base 21 and the convex portion 31b of the flooring material 31. The floor structure 11 includes a protrusion buffer member 62 disposed between the base 21 and the protrusion 31 b of the floor material 31. In this case, the transmission of vibration from the protrusion 31b of the flooring material 31 to the base 21 is suppressed by the protrusion buffer member 62. Therefore, noise below the floor structure 11 can be suppressed.

  (4) The floor structure 11 includes a recess cushioning member 63 disposed between the base 21 and the recess 31 a of the floor material 31. In this case, the transmission of vibration from the concave portion 31a of the floor material 31 to the base 21 is suppressed by the concave buffer member 63. Therefore, noise below the floor structure 11 can be suppressed.

  (5) The buffer member 63 for a concave portion is made of a rubber-based material. The floor structure 11 further includes a thickness adjusting member 71 made of a hard material harder than a rubber-based material. The thickness adjusting member 71 is stacked on the recess cushioning member 63 between the base 21 and the recess 31 a of the floor material 31.

  Since the floor structure 11 has a configuration in which the buffer member 63 for the concave portion is disposed using the space between the base 21 and the concave portion 31a of the floor material 31, the thickness of the buffer member 63 for the concave portion is set to be larger. Even if it does, it becomes possible to keep the height position of the floor material 31 constant with respect to the base 21. Here, if the thickness of the concave buffer member 63 is excessively large, the function of supporting the floor material 31 by the concave buffer member 63 may be reduced. In this regard, in the floor structure 11, since the buffer member 63 for the concave portion and the thickness adjusting member 71 made of the hard material are laminated, the thickness of the buffer member 63 for the concave portion and the thickness adjusting member 71 By adjusting the thickness of the concave portion, it is possible to suppress the concave portion buffer member 63 from becoming excessively thick. That is, even if the thickness of the buffer member 63 for the concave portion is set to be larger, the height position of the floor material 31 with respect to the base 21 can be kept constant, and the buffer member 63 for the concave portion becomes excessively large. Thickness can be suppressed. Therefore, the performance of the buffer member 63 for concave portions can be suitably exhibited.

  (6) Since the buffer member 62 for the convex portion of the floor structure 11 is in contact with the connecting member 41 (stud bolt 43), the vibration of the connecting member 41 can be suppressed by the buffer member 62 for the convex portion. In addition, although the buffer member 62 for protrusions of this embodiment has a through-hole 62a, and this through-hole 62a is in contact with the connecting member 41 (stud bolt 43), for example, a plurality of protrusions from which the through-hole 62a is omitted is provided. The connection member 41 (stud bolt 43) may be configured to be in contact with the connection member 41 by sandwiching the connection member 41 (stud bolt 43).

(Example of change)
The above embodiment may be modified as follows.
The base 21 has a frame structure, but may be changed to a base 21 having a flat plate structure such as a concrete slab, for example. Note that the frame structure of the base 21 may be a lattice structure.

The beam member 22 forming the base 21 is made of metal, but may be changed to a beam member 22 made of a material other than metal.
The floor material 31 has the concave portion 31a and the convex portion 31b facing the base 21. However, the surface of the floor material 31 facing the base 21 (the lower surface of the floor material) may be changed to a planar shape. . In such a floor structure 11 as well, it is preferable to provide a cushioning member for the floor material that supports the floor material 31 between the base 21 and the floor material 31. In this case, the cushioning member for flooring can be arranged at an arbitrary position between the base 21 and the flooring 31, but has the same configuration as the cushioning member 62 for projections in the above embodiment. Is preferred. That is, the cushioning member for a flooring material preferably contacts the connecting member 41, and more preferably has a through hole through which the connecting member 41 is inserted.

  -Although the said floor material 31 is provided with the deck plate 33, you may change to the floor material which omitted the deck plate 33. The floor material 31 is made of concrete or the like, but the material of the floor material 31 is not particularly limited, and may be changed to, for example, a floor material made of cement.

The planar shape of the floor material 31 is not limited to a rectangular shape, and may be, for example, a square shape.
The floor member 31 has the concave portion 31a extending from one end to the other end. For example, the floor material 31 may be changed to a floor material having concave portions only at both ends.

  -Although the said floor material 31 has a pair of recessed part 31a, the number of the recessed part 31a may be singular or plural. Further, the protruding portion 31b of the flooring material 31 can be composed of one or more.

The floor structure 11 has a plurality of divided floor materials 31. However, the floor structure 11 may be changed to an integrated floor material.
The first nut 42 of the connecting member 41 has a flange portion, but this flange portion may be omitted.

  As shown in FIG. 5, the first nut 42 and the stud bolt 43 of the connecting member 41 may be omitted, and a bolt 45 having a head may be used. The buried portion 41 a of the connecting member 41 is composed of the head of the bolt 45, and the buried buffer member 51 is arranged between the upper surface 45 a and the side surface 45 b of the head of the bolt 45 and the floor material 31. Further, the connecting member 41 may be formed of a screw member that is screwed into a screw hole formed in the base 21.

  The buried portion buffer member 51 is configured so that the connecting member 41 (the first nut 42) is inserted. For example, the connecting member 41 (the first nut 42) is immersed in a liquid material. To form a covering layer, and this covering layer may constitute a buffer member for an embedded portion.

-The buffer member 62 for convex parts may be omitted.
The buffer member 62 for a convex portion is in contact with the connecting member 41 (stud bolt 43), but may be separated from the connecting member 41.

  Although the protrusion buffer member 62 has the through hole 62a, a protrusion buffer member in which the through hole 62a is omitted as described above may be employed, or a plurality of protrusion buffer members may be provided around the connection member 41. May be provided. However, when the convex buffer member 62 having the through hole 62a is employed as in the above-described embodiment, the convex buffer member 62 can be positioned, and the horizontal movement of the convex buffer member 62 can be reduced. This is advantageous in that it can be regulated.

  -The buffer member 62 for convex parts may be comprised so that it may have adhesiveness. In this case, it is advantageous in that the protrusion buffer member 62 can be positioned and the movement of the protrusion buffer member 62 in the horizontal direction can be restricted.

The protrusion buffer member 62 may have a configuration in which, for example, a plurality of protrusion buffer members having different hardnesses are stacked.
-The convex buffer member 62 can be changed to a convex buffer member having a protrusion on at least one of the upper surface and the lower surface.

-The buffer member 63 for concave parts may be omitted.
-The buffer member 63 for concave portions may have a configuration in which, for example, a plurality of buffer members for concave portions having different hardnesses are stacked.

The buffer member 63 for a concave portion can be changed to a buffer member for a concave portion having a protrusion on at least one of the upper surface S32 and the lower surface S22.
The lower surface S22 of the buffer member 63 for the concave portion protrudes from the inside of the concave portion 31a of the flooring material 31, but may be changed so that the entire buffer member 63 for the concave portion is disposed inside the concave portion 31a.

The thickness adjusting member 71 may be omitted.
The thickness adjusting member 71 may be arranged between the base 21 and the buffer member 63 for the concave portion.
-The said thickness adjustment member 71 may be the structure which laminated | stacked several thickness adjustment members from which hardness differs, for example.

  The laminated structure of the buffer member 63 for the concave portion and the thickness adjusting member 71 may be a laminated structure in which the buffer member for the concave portion is sandwiched between the thickness adjusting members, or the thickness adjusting member may be a concave portion. It may be a laminated structure arranged so as to be sandwiched by the shock absorbing members.

  As shown in FIG. 6, a seal member 81 may be provided between the deck plate 33 and the lower end surface of the embedded portion 41a of the connecting member 41 (the open end surface of the first nut 42). The seal member 81 is arranged so as to surround the through hole 33 a of the deck plate 33, so that when concrete is poured on the deck plate 33, the concrete flows into the through hole 33 a of the deck plate 33. Can be suppressed. The seal member 81 is made of, for example, a rubber-based material. The seal member 81 can be formed integrally with the embedded portion buffer member 51.

  The base 21 and a part of the floor material 31 may be in contact with each other, but the base 21 and the floor material 31 are separated from each other by providing the floor material buffering member 61 as in the above embodiment. Is preferred.

The technical ideas that can be grasped from the above embodiment and modified examples will be described below.
(A) In the floor structure, the floor structure includes a floor cushioning member having a through hole and the connecting member inserted through the through hole as the floor cushioning member.

  (B) In the floor structure, the floor structure includes a floor material buffer member in contact with the connecting member as the floor material buffer member.

  11 floor structure, 21 base, 21a communicating portion, 22 beam member, 22a, 33a, 62a through hole, 31 floor material, 31a concave portion, 31b convex portion, 32 floor main body, 33 Deck plate, 41 ... Connecting member, 41a ... Buried part, 42 ... First nut, S12, S32, 42a, 45a ... Top surface, 42b, 45b ... Side, 43 ... Stud bolt, 44 ... Second nut, 45 ... Bolt 51: buffer member for buried portion, 61: buffer member for floor material, 62: buffer member for convex portion, 63: buffer member for concave portion, 71: thickness adjusting member, 81: seal member, R: rib, T1 to T4 ... thickness, S11 ... inner back surface, S21 ... base surface, S22, S31 ... lower surface.

Claims (4)

A base,
Floor material disposed on the base,
A floor structure including a connection member that connects the base and the floor material,
The connecting member has an embedded portion embedded in the floor material,
The floor structure, a buffer member for the buried portion disposed between the upper surface and side surfaces of the buried portion and the floor material,
A flooring cushioning member for supporting the flooring between the base and the flooring,
The flooring is
Having a concave portion and a convex portion facing the base,
The connecting member,
Provided to connect the base and the convex portion of the flooring,
The cushioning member for flooring,
Including floor structure arranged convexity cushioning member between the protruding portion of the flooring and the base. A base,
Floor material disposed on the base,
A floor structure including a connection member that connects the base and the floor material,
The connecting member has an embedded portion embedded in the floor material,
The floor structure, a buffer member for the buried portion disposed between the upper surface and side surfaces of the buried portion and the floor material,
A flooring cushioning member for supporting the flooring between the base and the flooring,
The flooring is
Having a concave portion and a convex portion facing the base,
The connection member is provided to connect the base and the protrusion of the floor material,
The cushioning member for flooring,
Including floor structure arranged recess for cushioning material between the recess of the flooring and the base. A base,
Floor material disposed on the base,
A floor structure including a connection member that connects the base and the floor material,
The connecting member has an embedded portion embedded in the floor material,
The floor structure, a buffer member for the buried portion disposed between the upper surface and side surfaces of the buried portion and the floor material,
A flooring cushioning member for supporting the flooring between the base and the flooring,
The flooring is
Having a concave portion and a convex portion facing the base,
The connecting member,
Provided to connect the base and the convex portion of the flooring,
The cushioning member for flooring,
A floor structure comprising: a buffer member for a convex portion disposed between the base and the convex portion of the floor material; and a buffer member for a concave portion disposed between the base and the concave portion of the floor material. . The concave cushioning member is made of a rubber-based material,
The floor structure,
Further comprising a thickness adjusting member made of a hard material harder than the rubber-based material,
4. The floor structure according to claim 2, wherein the thickness adjusting member is stacked on the buffer member for the concave portion between the base and the concave portion of the floor material. 5.

Images