JP2008184772A - Shock absorber for floor and floor structure using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock absorber for floor and floor structure using it capable of improving defects in quality of conventional shock absorber for floor and floor structure using it and holding the same elastic force by components made of rubber or elastic resin by extrusion molding to reduce its price. <P>SOLUTION: This shock absorber A for floor is constituted by forming tunnel-like hollow parts 2 arranged between a finish material 10 and a floor substrate 20 and forming substantially closed cross section in a base part 1 like a flat plate in a row integrally and forming at least one protruding bar 3 in the hollow part 2 along the hollow part 2 integrally. Usually, the hollow part 2 has a flat surface 2a being parallel with the base part 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a floor cushion disposed between a finishing material and a floor base and a floor structure using the same, and can be suitably used particularly for a directly pasted floor.

  For floor structures in school buildings, condominiums, and the like, for example, a directly attached floor in which a finishing material such as a wood system is applied to a concrete floor base via an adhesive is used. Usually, a cushioning body made of foam or the like is bonded to the bottom of the finishing material so as to follow the unevenness of the concrete floor substrate.

  However, if the buffer body such as the foam is too thin, not only the followability with respect to the unevenness is deteriorated, but also the danger increases because the shock cannot be absorbed and relaxed. In addition, problems such as footsteps transmitted downstairs and poor walking feeling also occur. On the other hand, if the buffer is too thick, there is a problem that warping occurs due to the influence of moisture in the case of a wood-based finishing material. In addition, there are cases in which problems such as the occurrence of cracks may occur even with finishing materials other than wood.

  Patent Document 1 has already disclosed a floor cushion and a floor structure using the floor cushion that can avoid such problems as warping of wood-based materials against moisture while achieving such conflicting requirements and absorbing and mitigating shock. (Patent Document 1).

JP 2004-068380 A

  That is, the invention according to Patent Document 1 has been made as a solution to the above-mentioned problem, and the first gist thereof is a floor cushion disposed between a finishing material and a floor foundation, The floor cushion is composed of an elastic body having a convex portion and a plurality of concave portions, and the projection of the elastic body is formed inside the concave portion. In which one of the finishing material or the floor base is disposed above the convex portion of the floor cushion, and the other of the finishing material or the floor base is located below the concave portion of the floor cushion. Provided floor structure to be arranged.

  The technique described in Patent Document 1 is practically excellent, but it is also true that further improvements have been pointed out in the implementation. That is, Patent Document 1 proposes a floor cushioning body that is composed of an elastic body having a plurality of convex portions and a plurality of concave portions, and in which the protrusions of the elastic body are formed inside the concave portions. Finishing material and floor base are to be arranged. However, if the proposed structure is suitable, there is a problem that the floor cushioning body is small in rigidity and sometimes expands. And since there is little contact area of the up-and-down both directions, it may be hard to stick at the time of bonding to a finishing layer or a board | plate material, and adhesive strength may not be securable. In addition, a structure in which cushion sheets are present on both the upper and lower surfaces, a material that does not originate from the spring performance of the cushioning material, and a large amount of material is used, which makes it difficult to reduce costs.

  The present invention has been made in view of the prior art as described above, improves the above-described quality defects, and maintains the same elastic force in a rubber or elastic resin extrusion molded product. The present invention provides a floor cushion that can be priced and a floor structure using the same.

  A first aspect of the present invention is a floor cushion disposed between a finishing material and a floor base, in which tunnel-shaped hollow portions that substantially form a closed cross section in a flat plate-like base portion are arranged in rows. Is a floor cushion formed by integrally forming at least one ridge in the hollow portion along the hollow portion. In a normal form, the hollow portion is parallel to the base portion. More specifically, the hollow portion has a trapezoidal or oval cross section, and the protrusions are formed on the base portion or flat surface of the hollow portion.

  The second of the present invention is a floor structure using the floor cushion of the first invention, wherein one of the finishing material on one side or the floor base is disposed on the base portion of the floor cushion, This is a floor structure in which the floor underside or finishing material on the other side is arranged in the hollow portion of the floor cushion.

  In the first aspect of the invention, the floor cushion is formed by integrally forming a tunnel-like hollow portion in a row on the flat base portion, and at least one ridge in the hollow portion. Is integrally formed along the hollow portion, so that it has excellent shock absorption and relaxation performance, high safety, and an appropriate walking feeling. Further, in claim 2, the construction property is particularly excellent. Therefore, it can be particularly suitably used as a directly pasted floor.

  The third, fourth, and fifth aspects are characterized by the shape of the so-called leg portion of the hollow portion, and constitute a floor cushion excellent in shock absorption relaxation performance. Furthermore, the part where the ridges are arranged is specified, and thereby an ideal reaction force-strain curve in which the reaction force smoothly increases as the strain increases is obtained.

  In claim 8, which is the second invention, the floor structure using the above-described floor cushion, the finishing material and the floor base can be freely combined, and the adhesiveness, workability, etc. An excellent floor structure could be provided.

  In the following, the first invention will be mainly described, but its basic structure is a structure in which a base part, a tunnel-like hollow part that forms a substantially closed cross-section integrally therewith, and a ridge formed in the inside thereof. When the floor is pressed, the legs of the closed part mainly act to exhibit soft elasticity, and when the floor is pressed with a stronger force, the protrusions exhibit high rigidity elasticity. The present invention provides a floor cushion that is optimal for a floor structure and has good workability.

  The floor cushion is provided at the bottom of the finishing material and is fixed on the floor base. The floor cushion follows the unevenness of the concrete floor base, and the finishing material is firmly supported by the floor base. In order to alleviate impact such as time, a hollow part and a ridge having elasticity corresponding to it are used in combination.

  The thing of patent document 1 is a structure with few contact areas in an up-and-down surface, and at the time of bonding to a finishing material or a floor base, it is hard to stick or it expands depending on the case, and the expected buffer effect is Although it was difficult to obtain, the floor cushioning material of the present invention solves these drawbacks, and in particular, a floor cushioning body that retains the same elastic force by extrusion can be supplied at a low price. It has become.

  The materials constituting the floor cushion are natural rubber, butadiene rubber, styrene butadiene rubber, isoprene rubber, chloroprene rubber, butyl rubber, nitrile rubber and other diene rubbers, ethylene propylene rubber, ethylene / propylene / diene ternary copolymer Examples thereof include thermoplastic elastomers such as coalescence, urethane rubber, polyamide-based elastomer, polyethylene-based elastomer, epoxy-based elastomer, and polyester-based elastomer, and soft resins such as soft vinyl chloride resin. These may be solid or foam. Further, the base part, the hollow part, and the ridges can be made of the same material or different materials, and preferably the three members are formed integrally by extrusion molding. The hardness is 40 to 80 degrees (JIS-A), preferably 50 to 60 degrees. Of course, it is needless to say that the base portion, the hollow portion, and the ridges may be the same or different.

  As for the hollow portion, it is preferable to provide a flat portion parallel to the base portion, and generally the cross section is generally trapezoidal or circular (including oval), but is not limited thereto. Needless to say, a so-called leg portion connecting the base portion and the flat portion can be used in a bent shape (including a tortoiseshell shape), a semicircular shape, or an elliptical shape. And a finishing material and a floor base will be stably fixed by providing a flat part parallel to a base part in a hollow part. Furthermore, the hollow portions formed integrally with the base portion need not all have the same shape, and the shape may be selected according to the purpose of use and the place of use, and the arrangement thereof is also free.

  In particular, the presence of a flat base portion over the entire surface can solve problems during bonding work, such as spreading during bonding or unstable bonding. If necessary, the adjacent flat surfaces of the hollow portion can be made continuous.

  By providing a hollow portion in the base portion, it is preferable that the hollow portion compressively deform and buckle deform when a load is applied to the floor cushion. That is, by making the hollow portion, it is possible to obtain a soft spring characteristic and to obtain a buffering effect by buckling deformation as well as compression deformation with respect to the load.

  A ridge is formed in the hollow portion. Needless to say, these ridges are generally formed in the base portion or flat portion of the hollow portion, and the number thereof can be increased or decreased as necessary. Further, in some cases, it is not necessary to form the ridges on all of the hollow portions. For example, it is possible to provide ridges on every other hollow portion.

  Furthermore, it is preferable that the height of the ridge is lower than the inner diameter of the hollow portion. In this way, when the buffer body is interposed between the finishing material and the floor base, the ridge does not contact in a state where no load is applied. On the other hand, when a load is applied, the plurality of hollow portions are first deformed, and then the load is received in two stages, in which the ridges are deformed. This is because, by appropriately setting and combining the spring characteristics of the hollow portion and the ridges, particularly effective shock absorption and relaxation can be exhibited.

  Specifically, in consideration of shock absorption and relaxation, for example, a hollow portion is formed in the elastic base portion to make it relatively soft, while the ridge is set to be relatively hard. As a result, the reaction force is initially small with respect to the distortion, and the reaction force increases as the distortion increases. For example, this is an effective cushion when the children fall over.

  In particular, it is more effective if the spring characteristics of the ridges are made non-linear and gradually stiffened, and when a load is applied to the hollow part by combining with a hollow part that compresses and buckles. In addition, an ideal reaction force-strain curve can be obtained in which the reaction force smoothly increases as the strain increases. Note that the non-linearity of the spring characteristics of the ridge can be easily realized, for example, by making the cross-sectional shape of the ridge into a mountain shape.

  The maximum height of the floor cushion according to the first aspect of the invention varies depending on the material, required characteristics, and the like, but 4 to 25 mm is appropriate, and 5 to 15 mm is particularly preferable. If the thickness is less than 4 mm, the function based on the spring characteristics of the buffer cannot be sufficiently exhibited, and if the thickness exceeds 25 mm, the improvement of the function cannot be expected, and the economical efficiency and workability deteriorate. In addition, about 0.5-3 mm is selected for the thickness of a base part and a hollow part.

  The height of the ridge is suitably 30 to 85% of the inner diameter of the hollow portion, and 40 to 60% is particularly preferable. If it is lower than 30%, the action of the ridges becomes too slow for the deformation of the hollow part, and the meaning of forming the ridges is lost, and if it is higher than 85%, the ridges deform at an early stage of deformation, and then This is because the hollow portion is deformed and the effect of receiving a load in two stages is reduced.

  The floor structure of the second invention is constructed by interposing the floor cushion of the first invention between the finishing material and the floor base, and the floor structure is a floor cushion base. The finishing material may be disposed on the upper side of the floor portion, and the floor base may be disposed on the lower side of the flat portion of the hollow portion, or vice versa. That is, the floor cushion has almost no front and back, and both have the same effect.

  The floor structure of the second invention is most effective when applied to a straight floor where the finishing material is spread directly on the concrete floor base, but is not limited to a straight floor and is not limited to a support leg. Needless to say, the present invention can be applied to a so-called double floor to which is attached.

  As the finishing material, a flooring material, flooring, carpet, CF sheet, cork, etc. that have been subjected to actual processing on the four circumferences from the viewpoint of usability and safety can be adopted. However, it is not limited to this, and ceramic finishing materials such as tiles and stones can also be used. In addition, thin decorative wood, soft resin on substrates such as plywood, MDF (medium fiber board), HDF (hard fiber board), OSB (oriented strand board), LVL (single board laminate), resin board, etc. It is also possible to use a composite of sheet finishing material, ceramic finishing material, etc. by bonding.

  The thickness of the finishing material varies depending on the material, dimensions, etc., but 6 to 18 mm is appropriate. If it is thinner than 6 mm, there is a problem in strength, and if it exceeds 18 mm, the flexibility is impaired and the feeling of walking deteriorates.

  Hereinafter, specific examples of preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a top view and a side view showing a first embodiment A1 of a floor cushion according to the present invention. Although the width and length are arbitrary, the floor cushion A1 of the first embodiment is 109 mm wide, and is entirely made of SBR having a rubber hardness of 60 degrees, and is integrally extruded in the vertical direction. It has been done.

  A flat base portion 1 is formed on the upper surface, and a hollow portion 2 having a flat portion 2a having a trapezoidal cross section in the vertical direction in the figure and parallel to the base portion 1 is provided at a constant interval on one surface. It is integrally formed. In each hollow portion 2, a substantially equilateral triangular ridge 3 is integrally formed from the center of the base portion 1. The rubber thickness of the base part 1 and the hollow part 2 was about 1 mm, the height of the hollow part 2 was about 5 mm, the distance between the adjacent hollow parts 2 and 2 was about 10 mm, and the height of the protrusion 3 was about 2 mm. .

  FIG. 2 is a side view showing a floor structure B1 of the second invention using the floor cushion A1 of the first embodiment shown in FIG. That is, the wooden finishing material 10 is directly fixed to the base portion 1 side of the floor cushion A1 in FIG. 1, and the flat portion 2a side of the hollow portion 2 is directly fixed to the floor base 20 (concrete floor base). The floor structure is straight. Since the flat base portion 1 is provided for the finishing material 10, the floor cushioning body A <b> 1 does not extend during construction, and the finishing material 10 and the floor substrate 20 are parallel to each other ( Since there is the base portion 1 and the flat portion 2a), the fixing is surely performed. Note that the floor structure B1 shown in FIG. 2 is abutted against another floor structure (not shown) to form a floor.

  The floor structure B1 shown in FIG. 2 follows the unevenness of the concrete floor foundation 20, and the shock absorption and the comfortable walking feeling are ensured, so that the floor structure B1 is particularly suitable as a directly attached floor structure. That is, since only the flat part 2a of the hollow part 2 is fixed to the floor base 20, the floor buffer 20 is partially in contact with the floor base 20 when viewed from the entirety. Therefore, even if the ground floor 20 is uneven, it is absorbed by the deformation of the non-contact portion and the leg 2b of the hollow portion 2.

  Speaking of the shock absorbing performance, when an impact load due to the fall of a child or the like acts on the finishing material 10, only the hollow portion 2 (particularly the leg portion 2b) is first deformed and buckled. In this initial stage, the reaction force against the strain is small, so that the cushion is effective. When the strain further increases, this time, as a second stage shock absorbing action, the protrusion 3 comes into contact with the floor base 20 side and compresses and deforms, and the reaction force increases. Moreover, since the protrusion 3 has a mountain shape in cross section, the spring characteristics are non-linear. Accordingly, an ideal reaction force-distortion curve in which the reaction force smoothly increases with an increase in strain when a load is applied is obtained, and safety and a comfortable walking feeling are ensured.

  FIG. 3 is a diagram showing a reaction force-strain curve in the floor cushion A1 of the first embodiment. The test method is to measure the amount of rubber deformation against the compressive load with an autograph manufactured by Shimadzu Corporation. As the conditions, the load speed was 5 mm / min, the load area (diameter) was 100 mm, and the sample specifications were such that the upper and lower surfaces of the floor buffer A1 in FIG. The measurement results are as shown in FIG. 3, and the reaction force-strain curve has two stages, a curved portion based on the leg 2b of the hollow portion 2 and a curved portion based on the ridge 3, and both curves are It is tied smoothly.

  FIG. 4 is a side view showing a second embodiment A2 of the floor cushion according to the present invention, and is an example in which protrusions 3 are formed every other hollow portion 2 with respect to the first embodiment A1.

  FIG. 5 is a side view showing the third embodiment A3, in which a convex shape 3 is provided between the hollow portions 2 with respect to the first embodiment A1. As described above, by appropriately combining the hollow portion 2 and the protrusion 3, it is possible to cope with a floor having various required characteristics, and although not illustrated, for example, a plurality of protrusions 3 may be provided in the hollow portion 2. Is possible.

  FIG. 6 is a side view showing a fourth embodiment A4 of the floor cushion according to the present invention. This is an example in which the hollow portion 2 having a trapezoidal cross section of the floor cushion A1 of the first embodiment is an oval shape (the leg portion 2b is semicircular) 3.

  FIG. 7 is a side view showing the fifth embodiment A5, in which the leg 2b of the trapezoidal hollow section 2 of the first embodiment A1 is formed in a dogleg shape. These are easy to bend with respect to the first impact, absorb the impact quickly, and have a soft feel.

  The floor cushion according to the present invention and the floor structure using the floor cushion are composed of a base portion on a flat plate, a hollow portion and a protrusion integrally therewith, and integral molding by extrusion molding. Because it is possible, the manufacturing cost is low, and it has excellent shock absorption and relaxation performance, high safety, moderate walking feeling, and excellent workability. It can be particularly preferably used.

FIG. 1 is a top view and a side view showing a first embodiment of a floor cushion according to the present invention. FIG. 2 is a side view showing a floor structure using the floor cushion according to the first embodiment. FIG. 3 is a diagram showing a reaction force-distortion curve in the floor cushion according to the first embodiment. FIG. 4 is a side view showing a second embodiment of the floor cushion according to the present invention. FIG. 5 is a side view showing a third embodiment of the floor cushion according to the present invention. FIG. 6 is a side view showing a fourth embodiment of the floor cushion according to the present invention. FIG. 7 is a side view showing a fifth embodiment of the floor cushion according to the present invention.

Explanation of symbols

1. Base part,
2 hollow part,
2a Flat part,
2b ... leg,
3. Projections,
DESCRIPTION OF SYMBOLS 10 ... Finishing material 20 ... Floor foundation A1-A5 ... Floor cushioning body of 1st invention,
B1. Floor structure of the second invention.

Claims (8)

  A floor cushion disposed between a finishing material and a floor base, in which tunnel-shaped hollow portions that substantially form a closed cross-section are formed in a plate-like base portion in a row and integrally formed. The floor cushion is characterized in that at least one ridge is continuously formed integrally along the hollow portion in the hollow portion.   2. The floor cushion according to claim 1, wherein the hollow portion has a flat surface parallel to the base portion.   The floor cushion according to claim 1 or 2, wherein the hollow portion has a trapezoidal cross section.   The floor cushion according to claim 1 or 2, wherein the hollow section has a circular cross section.   The floor cushion according to claim 1 or 2, wherein the hollow section has a turtle shell shape.   The floor cushion according to any one of claims 1 to 5, wherein the ridge is formed in the base portion.   The floor cushion according to any one of claims 1 to 5, wherein the ridges are formed on a flat surface.   It is a floor structure using the floor cushion according to any one of claims 1 to 7, wherein one of the finishing material on one side or the floor base is disposed on the base portion of the floor cushion. The floor structure is characterized in that a floor base or finishing material on the other side is disposed in a hollow portion of the floor cushion.

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