JPH0735011Y2 - Soundproof flooring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a wood-based soundproofing floor material with improved soundproofing performance, particularly against light-weight floor impact sound.

(Prior Art) As a wood-based soundproof floor material that reduces floor impact sound, conventionally, it is known that the lower surface of a wooden floorboard is lined with a cushioning material that reduces floor impact force. The heat 15
The floor impact sound level based on JIS-A1419 was evaluated by laying it on a 0 mm concrete floor slab, and L-60 ~
It is about L-55.

Further, there is also known a soundproof flooring material in which a cushioning material and a vibration damping sheet are lined on the lower surface of the wooden flooring material, and the soundproofing floor material tries to obtain a soundproofing effect by absorbing vibration by the vibration damping sheet. However, when the light-weight floor impact sound level was evaluated in the same manner as described above, only the soundproof performance of L-50 was obtained, and the weight of the soundproof floor material was large due to the heavy vibration damping sheet. There will be a new problem.

Therefore, recently, the Japanese Utility Model Publication No. 63-179350 or the Japanese Utility Model Publication No.
A soundproof flooring material as disclosed in Japanese Patent No. 43134 has been proposed. As shown in FIG. 6, the former soundproofing floor material is such that a sound insulating sheet having irregularities, a vibration damping sheet or a cushioning sheet b, a perforated wooden board c, and a cushioning material d are sequentially attached to the lower surface of the wooden floor material a. The sound-insulating flooring of the latter was worn on the lower surface of the wooden floorboard,
Perforated cushioning material or damping material, wooden board or perforated wood board, and cushioning material are laminated in this order. In each case, the cushioning material is laminated on the lower surface of the wooden floor board and on the upper and lower surfaces of the perforated board. It is a soundproof flooring material that is integrally provided with the backing material.

(Problems to be solved by the invention) The above soundproof floor material absorbs a floor impact person inside a through hole provided in a perforated plate when a floor impact force is applied to the upper surface of the essential floor plate, Alternatively, the sound absorbing property is improved by guiding the vibration energy transmitted to the upper cushioning material to the lower cushioning material through the through hole and absorbing it.
At that time, the air inside the through-hole vibrates inside the through-hole and has an escape path only to the cushioning material on the lower side.

Therefore, as shown in FIG. 7, in the former soundproof floor material,
The light-weight floor impact sound level evaluation based on JIS-A1419 shows that only L-55 soundproof effect can be obtained.

In view of the above, the present invention is a soundproof flooring material in which the backing material is integrally provided on the lower surface of the floorboard, which is JIS-A1419.
The purpose is to obtain L-45 by light weight floor impact sound level evaluation by.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention disperses the floor impact force when the floor impact force is applied to the upper surface of the wooden floor board, and at the same time, in the through hole of the perforated plate. The existing air is caused to flow to another through hole to suppress air vibration due to an increase in air pressure inside the through hole.

Specifically, the solution means taken by the present invention is to provide a soundproof flooring material with a wooden floorboard, a hollow plate provided on the lower surface of the wooden floorboard, and a perforated plate having a large number of through holes provided on the lower surface of the hollow plate. And a backing material formed by laminating a porous cushioning material on both upper and lower surfaces of the above, and at least one of the upper and lower surfaces of the perforated plate is provided with a concave groove for interlocking the through holes with each other. It is what

(Operation) With the above configuration, when a floor impact force is applied to the wooden floorboard, the floor impact force is dispersed by the hollow plate.

Further, when a floor impact force is applied to the wooden floor board, the air inside the through hole formed in the perforated plate flows through the concave groove and flows into other through holes communicating with each other by the concave groove. be able to.

For this reason, the impact sound generated by the floor impact force reaches the through hole as air vibrations dispersed by the hollow portion, and the air in the through hole flows to other through holes. Since the rise is extremely small, it is extremely difficult for air vibrations to be transmitted to the lower cushioning material.

Further, since the perforated plate is provided with the through holes and the recessed groove that connects the through holes to each other, the rigidity of the perforated plate is reduced and the flexibility is increased. ing.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cross-sectional structure of a soundproof flooring A according to the present invention. The soundproofing flooring A is integrated with a wooden floorboard 1 and a backing 3 with a hollow plastic 9 as a hollow plate interposed therebetween. It becomes.

The wooden floorboard 1 includes a surface material 4 made of dried veneer and a base plate 5 made of plywood integrally laminated on the lower surface of the surface material 4.
Consists of. As the wooden floor board 1, a plywood such as a floor material may be appropriately used.

The hollow plastic plate 9 is obtained by extruding plastic, and a large number of flat hollow portions 9a penetrate through the inside thereof, and absorbs the floor impact sound generated in the wooden floorboard 1 by the hollow portions 9a. At the same time, the floor impact force applied to the wooden floorboard 1 by the partition wall 9b that partitions the hollow portions 9a from each other is lined with the backing material 3
Distributes and transmits to. In this way, by interposing the hollow plastic 9 between the wooden floorboard 1 and the backing material 3, it is possible to improve the sound absorption inside the flooring material and reduce the weight thereof. In addition, the hollow plastic plate 2 is preferable because it is easy to handle because the hollow portion 2a reduces the weight.

The backing material 3 is laminated on the perforated plate 6 having a large number of through holes 6a penetrating in the vertical direction, the upper cushioning material 7 laminated on the upper surface of the perforated plate 6, and the lower side of the perforated plate 6. It consists of the lower cushioning material 8.

As the perforated plate 6, one that can stably support the wooden floor plate 1 can be appropriately used, and specifically, plywood, particle board, wood cement plate, plastic plate, or the like can be used.

As for the size of the through hole 6a provided in the perforated plate 6, the floor impact sound reaching the inside of the through hole 6a through the hollow plastic plate 9 and the upper cushioning material 7 in addition to the wooden floor plate 1 is the through hole 6a.
The sound can be absorbed inside, and the vibration that is added to the wooden floor board 1 and transmitted to the upper cushioning material 7 through the plastic plate 9 is penetrated through the through hole.
It is necessary to have a material that can be guided to the lower cushioning material 8 through the air inside 6a. Specifically, a circular cross section with a diameter of 10 mm or more is preferable, and a circular cross section with a diameter of about 20 mm is particularly preferable. It is preferable because it has excellent sound absorption and air flowability. The pitch of the through holes 6a can be appropriately changed depending on the material of the upper and lower cushioning materials 7, 8 and the like, but it is preferable that the pitch of the through holes 6a is about 50 mm in both the vertical and horizontal directions so that the entire floor board has flexibility.

As the upper cushioning member 7 and the lower cushioning member 8, a flexible porous body can be appropriately used in order to absorb the floor impact force applied to the wooden floorboard 1, and specifically, such as glass wool or rock wool. An inorganic fiber mat, a plastic fiber mat such as polyester or polypropylene, or a foamed plastic mat can be used. It is preferable that the mat has a thickness of 2 to 10 mm because it is possible to obtain appropriate impact absorption without increasing the thickness of the entire flooring material.

Although not limited, the material of the lower cushioning material 8 is made more flexible than the material of the upper cushioning material 7 in order to improve the shock absorbing property and the conformability to the floor base made of concrete floor slab or the like. It is preferable.

Further, when the upper and lower cushioning materials 7, 8 are made of fiber cushioning material respectively, air flow occurs inside the cushioning material, and the fluidity of air inside these upper and lower cushioning materials 7, 8 is increased. Therefore, when the floor impact force is applied to the wooden floorboard 1, the through hole
The air inside 6a can flow into the upper and lower cushioning members 7 and 8. Therefore, the air pressure inside the through hole 6a is unlikely to rise, so that the sound absorbing function of the through hole 6a is effectively exerted.

In the soundproof flooring material A having the above-described structure, as a feature of the present invention, as shown in FIG. 2, a vertical groove extending in the vertical direction as a concave groove for communicating the through holes 6a with each other on the lower surface of the perforated plate 6. 6b and a lateral groove 6c extending in the lateral direction are provided.

In this case, for the soundproof flooring material A having a thickness of 16 mm, a vertical length of 950 mm, and a horizontal length of 1840 mm, as shown in FIGS. 2 and 3, the vertical groove 6b has a deep groove. It has a cross section of about 1 mm in width and about 3 mm in width, and two rows are provided between each through hole 6a.
As shown in FIGS. 2 and 4, the horizontal grooves 6c have the same cross section as the vertical grooves 6b, and are provided at a total of 5 rows at equal intervals.

By doing so, when a floor impact force is applied to the wooden floorboard 1, the air inside the through hole 6a flows through the vertical groove 6b and into the other through holes 6a that communicate with each other in the vertical direction. be able to. Then, the air flowing in the vertical direction is passed through the horizontal groove 6c.
It can also flow inside the other through holes 6a communicating with each other via the. Therefore, the floor impact force is applied to the wooden floor board 1, and the air inside the upper cushioning material 7 is passed through the through holes of the perforated board 6.
Even if it flows into the inside of the 6a, the air in the through hole 6a flows to the other through hole 6a through the vertical groove 6b or the horizontal groove 6c, so that the through hole 6a
The internal air pressure does not rise. Therefore, the impact sound generated by the floor impact force is prevented from being largely transmitted to the floor base due to the repulsion of the air inside the through hole 6a, so that the sound absorbing function of the through hole 6a is improved and the soundproofing performance of the soundproof floor material A is improved. Is improved.

Further, by providing the through hole 6a, the vertical groove 6b, and the horizontal groove 6c in the perforated plate 6, since the rigidity of the perforated plate 6 is reduced and the flexibility is increased, the perforated plate 6, the upper and lower cushioning materials 7 are provided. , 8 are integrated with each other, and the backing material 3 has flexibility and flexibility.
Therefore, even if a floor impact force is applied to the wooden floor material 1, the floor impact material can be absorbed while the backing material 3 is made flexible, and the impact force absorption of the soundproof floor material A is improved.

It should be noted that it is preferable to provide both the vertical groove 6b and the horizontal groove 6c as in the above embodiment from the viewpoint of the fluidity of the air in the through hole 6a, but it is not always necessary to provide both, and the inside of the through hole 6a is not necessarily provided. The vertical groove 6b or the horizontal groove 6c may be provided so that the air can flow in the vertical direction or the horizontal direction.

Further, in the above embodiment, the vertical groove 6b and the horizontal groove 6c are provided only on the lower surface of the perforated plate 6, but they may be provided only on the upper surface of the perforated plate 6 or on both upper and lower surfaces of the perforated plate 6. When the vertical groove 6b and the horizontal groove 6c are provided on the upper and lower surfaces of the perforated plate 6, the air flow becomes smoother, and the soundproofing property and the shock absorbing property can be further improved.

Next, the evaluation test of JIS-A1419 for the soundproof floor material A described above will be described.

As a specific example to be subjected to the evaluation test, a wooden flooring material 1 having a thickness of 2.8 mm made of a veneer-clad plywood and a plywood having a through hole 6a, a vertical groove 6b and a horizontal groove 6c as in the above-mentioned example: A backing material 3 in which an upper cushioning material 7 made of a foamed plastic mat having a thickness of 1.5 mm and a lower cushioning material 8 made of a plastic fiber mat having a thickness of 6.0 mm are laminated on the upper and lower surfaces of the perforated plate 6 Thickness interposed between the wooden floorboard 1 and the backing material 3:
A soundproof floor board A including a 1.5 mm hollow plastic plate 9 was prepared.

On the other hand, as a comparative example, a wooden flooring material 1 similar to the above specific example
And a soundproof floor material constituted by a perforated plate 6 having only through holes 6a and not having both vertical grooves 6b and horizontal grooves 6c, and upper and lower cushioning members 7, 8 similar to the above-mentioned specific example. Prepared.

The results of the evaluation test are as shown in FIG. 5, and the sound insulation performance of the comparative example of the soundproof floor material is L-50 level, whereas the sound insulation floor material A of the specific example is L-50 level. We were able to achieve the −45 level.

(Effect of the Invention) As described above, according to the soundproof flooring material of the present invention,
Since a hollow board is provided on the lower surface of the wooden floor board, the floor impact force applied to the wooden floor board is dispersed by the hollow board and is transmitted to the backing material.In addition, the perforated board of the backing material has a groove for communicating the through holes with each other. Because the floor impact force is applied to the wooden floorboard, the air inside the through hole flows to the other through holes through the concave groove, so that even if the impact noise reaches the through hole due to air vibration. Since the internal air pressure does not rise, the air vibration inside the through hole is not transmitted to the lower cushioning material. In this way, with a hollow plate,
Due to the synergistic effect with the backing material having the through-holes communicated with each other by the groove, the soundproofing performance is greatly improved, and the evaluation of L-45 can be achieved in the JIS-A1419 lightweight floor impact sound level evaluation.

In addition, since at least one of the upper and lower surfaces of the perforated plate is provided with a concave groove for communicating the through hole, the rigidity of the perforated plate is reduced and the flexibility is increased, so even if a floor impact force is applied to the wooden floor material,
The backing material can absorb the floor impact force while being flexible.

[Brief description of drawings]

1 to 4 show a soundproof flooring material which is an embodiment of the present invention. FIG. 1 is an enlarged sectional view of a part, FIG. 2 is a plan view of the lower surface, and FIG. 3 is a part of a perforated plate. Fig. 4 is a longitudinal sectional view of a part of a perforated plate, Fig. 5 is a diagram showing the results of an evaluation test based on JIS-A1419, Fig. 6 is a sectional view of a conventional soundproof flooring, FIG. 7 is a diagram showing the results of an evaluation test based on JIS-A1419 of the soundproof floor material of FIG. A: Soundproof floor material 1 ... Wooden floor material 3 ... Lining material 4 ... Surface material 5 ... Base plate 6 ... Perforated plate 6a ... Through hole 6b ... Vertical groove (concave groove) 6c. Horizontal groove (concave groove) 7 ... Upper cushioning material 8 ... Lower cushioning material 9 ... Hollow plastic plate

Claims (1)

[Scope of utility model registration request] 1. A wooden floorboard, a hollow plate provided on the lower surface of the wooden floorboard, and a porous cushioning material laminated on the upper and lower surfaces of a perforated plate provided on the lower surface of the hollow plate and having a large number of through holes. A soundproof flooring material, characterized in that it is integrally formed with a backing material, and a groove is provided on at least one of the upper and lower surfaces of the perforated plate so that the through holes communicate with each other.