JP2012041742A - Floor material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor material which has an impact absorption characteristic to reduce an impact from the floor that is received by a falling person and prevents excessive sinking in walking without impairing walking feel and generating unevenness.SOLUTION: A floor material comprises a first base material 2, a cushioning material 3, and a second base material 4 which are laminated in this order from a surface side. The first base material has a thickness of 0.5 to 1.5 mm, and the cushioning material has a thickness of 0.5 to 2.5 mm and an Asker C hardness of 35 to 60 degrees. The floor material has a maximum acceleration (G value) of less than 130 G that is measured by a method according to JIS A 6519, has a practically sufficient impact absorption characteristic as a flooring material for a general house, and indicates that a surface of the first base material is not damaged even when it is subject to an impact.

Description

  The present invention relates to a flooring, and more particularly to a flooring excellent in shock absorbing performance.

  There are frequent accidents in which injuries are caused by the impact of flooring when an elderly person or a disabled person falls in the room where the flooring is laid, and there are many cases of serious injury such as broken bones. For this reason, it is desired to develop a flooring material having a function of reducing the impact from the flooring material when it falls, that is, a shock absorbing performance. According to a report from the Architectural Institute of Japan Floor Work WG, if the value of the maximum acceleration (G value) measured by the measuring method of JIS A6519 is 100G or less, when a human falls and hits his head etc. on the floor Even if there is, it is said that it is hard to suffer injury.

  Patent Document 1 discloses a wooden floor material having a shock absorption performance of 80 G or less by the above measurement by laminating a shock absorber having an Asker C hardness of 70 degrees or less and a thickness of 2 mm or more on the back surface of a surface material. It is described that it is obtained.

JP 2010-47979 A

  In the wooden flooring described in Patent Document 1, plywood or wood fiber board having a thickness of about 2 to 13 mm is used as the surface material (2 mm and 4 mm thick plywood in the embodiment), and the thickness is used as the shock absorbing material. Synthetic resin foams or rubber foams of 2 mm or more are supposed to be used. However, a certain amount of thickness is required for the impact absorbing material to exhibit the desired impact absorbing performance, and the flooring material as a whole. Tended to be thick.

  In addition, it is generally performed that floor materials are formed with male seeds at the end of two adjacent sides and female ends at the other end of the two ends, and the flooring is connected to each other through the fitting between the fruits. However, since a fruit cannot be formed on a shock absorber made of a soft synthetic resin foam or rubber foam, the back surface of the shock absorber as described in claim 2 of the patent document 1 and the examples. Further, it is necessary to provide a back material such as a 4 mm thick plywood on the side to form fruit on the back material, and the overall thickness of the floor material has become large.

  For this reason, there is a step between a room where a thick flooring with shock absorbing performance is constructed and a room where a thin flooring without shock absorbing performance is constructed. Could cause serious problems. Although it is possible to eliminate the step by providing a height adjusting material such as joists or plywood on the back surface of the floor material, it is not preferable because it requires extra work and cost.

  In addition, it is possible to reduce the step by making the surface material thinner for floor materials with shock absorption performance, or thicker surface material for floor materials that do not have shock absorption performance. However, in the former case, the thin surface material is bent and easily broken and the durability is lowered. In the latter case, the use of the thick surface material increases the cost. Furthermore, since the amount of deflection when receiving a load varies depending on the thickness of the surface material, this may cause actual breakage.

  In addition, when the shock absorbing material is thick, the shock absorbing performance is improved, but when the person walks, the shock absorbing material sinks more and the walking feeling becomes worse. In addition, there is a step between the floor material that receives the load of the person walking and the floor material that does not receive the load adjacent to it, which may cause tripping during walking or the adjacent floor material that appears due to the step. There is a risk that an object may collide with the side end and damage the flooring.

  In order to reduce the sinking amount due to the thickness of the shock absorber, methods such as reducing the thickness of the shock absorber or increasing the hardness of the shock absorber can be considered. This is actually a difficult method to adopt.

  By the way, in order to make it hard to be injured even when a human falls and hits his / her head on the floor, the G value measured by the measurement method stipulated in the JIS should be 100G or less. Although it is preferable, it is an evaluation index when used on the floor of a gymnasium as specified in this JIS. Even if a moderate index is assumed, it is considered that it functions as a sufficiently effective flooring in practice. In general, the G value of what is conventionally marketed as a residential flooring is about 140 to 150G. Therefore, in the present invention, an index is set to a flooring material having a G value lower than those conventional flooring materials, that is, a G value of less than 130G.

  Therefore, the problem to be solved by the present invention is that there is a level difference in floor construction height with a room that has sufficient shock absorbing performance to be required as a flooring material for a house and does not require shock absorbing performance. It is intended to provide a novel flooring which prevents the occurrence of a decrease in the feeling of walking and the generation of a step by preventing the occurrence of excessive sinking during walking.

  In order to solve this problem, the present invention according to claim 1 is a flooring in which a first base material, a cushioning material, and a second base material are sequentially laminated from the surface side. The base material has a thickness of 0.5 to 1.5 mm, the buffer material has a thickness of 0.5 to 2.5 mm, and has an Asker C hardness of 35 to 60 degrees.

  In the flooring material having a laminated structure of the first base material / buffer material / second base material as described in claim 1, the present invention buffers the impact received by the floor material surface by the cushioning material, By making the thickness of the first base material and the buffer material relatively thin within a predetermined range, the effect of preventing sinking on the floor material surface is exhibited.

  More specifically, in the flooring of the present invention, the thickness of the first base material is set to 0.5 to 1.5 mm, and the thickness of the buffer material is set to 0.5 to 2.5 mm. Even when the first base material is bent, the maximum sinking amount of the first impact material can be suppressed to 2.5 mm, so that the first base material can be prevented from cracking.

  Furthermore, by setting the Asker C hardness of the cushioning material to 35 to 60 degrees, it is possible to reduce the G value received when a person falls down to less than 130 G in combination with the regulation of the thickness range described above. As a flooring material, the necessary and sufficient shock absorbing performance is exhibited, and even when a person falls and hits his / her head against the floor, the occurrence of injury can be effectively prevented.

It is sectional drawing which shows the structure of the flooring by this invention concerning Claim 1.

  First, the structure of the flooring according to the present invention will be described with reference to FIG. As shown in FIG. 1, the flooring 1 according to the present invention has a laminated structure of first base material 2 / buffer material 3 / second base material 4 from the surface side.

  The first base material 2 is made of, for example, a wood fiber board such as MDF or HDF, a wood board such as a plywood, a solid board, a laminated board or a laminated board. A decorative sheet such as a resin sheet is attached. Moreover, arbitrary coating can be given to the surface of the 1st base material 2, or the surface of the decorative sheet stuck on this surface. The coating is preferably performed using an anti-slip paint having anti-slip performance.

  The thickness of the first substrate 2 is 0.5 to 1.5 mm. If the thickness is less than 0.5 mm, the surface strength is weak, and damage or dents are likely to occur upon impact. When it becomes thicker than 1.5 mm, the shock absorbing performance of the cushioning material 3 laminated on the back surface is impaired.

  The buffer material 3 is, for example, a synthetic resin foam such as ethylene vinyl acetate copolymer (EVA), ethylene-vinyl alcohol copolymer (EVOH), polyethylene (PE), polyurethane (PU), synthetic rubber, natural rubber, etc. And having an Asker C hardness of 35 to 60 degrees is used. If the Asker C hardness is less than 35 degrees, it is too soft and the sinking during walking increases, resulting in discomfort. In addition, when a person falls, the impact received from the first base material 2 cannot be sufficiently buffered, and there is a risk that the head of the person who has fallen or the like will be strongly struck against the lower second base material 4. On the other hand, if the Asker C hardness exceeds 60 degrees, it becomes too hard as a cushioning material, and the impact absorbing function cannot be sufficiently exhibited.

  The thickness of the buffer material 3 is 0.5 to 2.5 mm. If the thickness is less than 0.5 mm, the impact absorbing performance is insufficient, and it becomes difficult to obtain a G value of less than 130 G in the floor hardness test. When it becomes thicker than 2.5 mm, the first base material 2 will bend deeply when the first base material 2 receives an impact, and the possibility that the first base material 2 will break increases.

  The second base material 4 is made of a wood material such as a wood fiber board such as MDF and HDF, a plywood, a solid material, a laminated board, and a laminated material, similarly to the first base material 2.

  The second base material 4 needs to have a large thickness so that the fruit (male, female) that fits with the floor material adjacent to the second base material 4 is formed on the quadruple front end. The thickness is 0 mm. If the thickness is less than 5.0 mm, it is difficult to form fruit in this thickness range. When it becomes thicker than 10.0 mm, the thickness of the entire flooring material becomes too large, and a level difference is likely to occur in the floor construction height with a room that does not require shock absorbing performance.

  Hereinafter, the configuration and operational effects of the present invention will be more specifically demonstrated by describing examples of the present invention in comparison with comparative examples. In addition, this invention is not limited to the following Example, It cannot be overemphasized that various deformation | transformation and change are accept | permitted within the range of the invention defined by description of a claim.

  In the flooring 1 having the laminated structure of the first base material 2 / the buffer material 3 / the second base material 4 shown in FIG. 1, as shown in Tables 1 to 3 for each layer, the material, thickness and buffer material hardness are variously changed. Various flooring samples were obtained by changing, and connected to the floor substrate through fitting between the fruits. Then, for each flooring sample, the maximum acceleration is measured by the measuring method of JIS A6519 to evaluate the impact absorption performance, and whether or not the surface of the first base material 2 is damaged when receiving an impact is visually confirmed. did. These evaluations are also shown in Tables 1 to 3. Floor material samples A-2 to A-4 in Table 1, floor material samples B-2 to B-4 in Table 2, and floor material samples C-3 to C-5 in Table 3 are examples of the present invention. These are all G values of less than 130 G, and it has been confirmed that the impact absorption performance is improved compared to conventional floor materials for general housing. There was no damage. In addition, although different sample numbers are attached | subjected to each table | surface, flooring material samples A-3, B-3, and C-4 are the same Example of this invention.

  More specifically, Table 1 shows that in the flooring material having a laminated structure of the first base material / buffer material / second base material, the thickness of the first base material is set in five ways within a range of 0.3 to 3.0 mm. In other words, flooring samples A-1 to A-5 were prepared under the same conditions for the cushioning material and the second base material, and data and results of tests performed to confirm the influence of the thickness of the first base material Is shown. As can be seen from the results shown here, the samples A-2 to A-4 in which the thickness of the first base material is 0.5 to 1.5 mm are all excellent in impact absorption performance with a G value of less than 130 G, The surface of the first base material was not damaged even when subjected to an impact, and the durability was excellent, whereas the sample A-1 in which the thickness of the first base material was 0.3 mm was excellent in shock absorbing performance. However, the surface of the first base material was damaged by the impact. Further, Sample A-5 in which the thickness of the first base material was 3.0 mm had a G value exceeding 130 G, and the impact absorption performance was insufficient. From this result, in order to prevent damage to the first base material due to impact while exhibiting sufficient shock absorbing performance, the thickness of the first base material should be in the range of 0.5 to 1.5 mm. confirmed.

  Table 2 shows a flooring material having the same laminated configuration. The thickness of the cushioning material is changed in five ways in the range of 0.3 to 3.8 mm, and the first base material and the second base material all have the same conditions. Material samples B-1 to B-5 are prepared, and data and results of tests performed to confirm the influence of the thickness of the buffer material are shown. As can be seen from the results shown here, samples B-2 to B-4 each having a buffer material with a thickness of 0.8 to 2.3 mm all have a G value of less than 130 G, have excellent shock absorbing performance, and receive impact. Even though the surface of the first base material was not damaged, the sample B-1 having a buffer material thickness of 0.3 mm had a G value exceeding 130 G, and the shock absorption performance was insufficient. . Sample B-5 having a buffer material thickness of 3.8 mm was sufficiently excellent in impact absorption performance, but the surface of the first base material was damaged by the impact. From this result, it was confirmed that the thickness of the cushioning material should be within the range of 0.5 to 2.5 mm in order to prevent damage to the first base material due to impact while exhibiting sufficient shock absorbing performance. It was.

  Table 3 shows a flooring material having a similar laminated structure, while fixing the thickness of the cushioning material to 1.2 mm, which is a substantially central value in the range of 0.5 to 2.5 mm confirmed from the results of Table 2. The Asker C hardness was changed in seven ways in the range of 10 to 80 degrees, and flooring samples C-1 to C-7 were prepared under the same conditions for the first base material and the second base material. Data and results of tests conducted to confirm the influence of hardness are shown. As can be seen from the results shown here, the samples C-3 to C-5, each having a cushioning material hardness of 40 to 55 degrees, have a G value of less than 130 G, excellent shock absorption performance, and even when subjected to an impact. The surface of the first substrate was not damaged. On the other hand, the sample C-1 whose hardness is 10 degrees, the sample C-2 which is 25 degrees, the sample C-6 which is 65 degrees and the sample C-7 which is 80 degrees all have G values. It exceeded 130G, and the shock absorption performance was insufficient. In Samples C-1 and C-2, since the buffer material is too soft, the impact received by the first base material is transferred as it is to the second base material on the back side without buffering. Since the G value exceeds 130G, and the samples C-6 and C-7 are too hard as cushioning materials, the impact received by the first base material laminated on the surface is buffered. It was thought that the G value would exceed 130G because it would bounce back. From this result, it was confirmed that a buffer material having an Asker C hardness of 35 to 60 degrees should be used.

  In addition, in the flooring material samples shown in each table, MDF was used for the first base material and the second base material, and EVA was used for the buffer material. However, other materials (for example, the first base material and the first base material) Even when the same test was performed by changing to plywood as one or both of the two substrates and PU as the buffer material, no significant difference was found from the above results. Therefore, it was confirmed that the material used for each layer is not limited in the present invention.

1 Floor material 2 First base material 3 Buffer material 4 Second base material

Claims (1)

From the surface side, the first base material, the buffer material, and the floor material formed by sequentially laminating the second base material, the first base material has a thickness of 0.5 to 1.5 mm, The flooring material is characterized in that the cushioning material has a thickness of 0.5 to 2.5 mm and an Asker C hardness of 35 to 60 degrees.

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