JPH02183045A - Sound insulated woody flooring and manufacturing thereof - Google Patents

Abstract

PURPOSE:To promote sound insulation performance by binding a middle heartwood punching plywood and a face plywood through a buffer material and, at the same time, burying a foam into a punch section of the middle heartwood punching plywood. CONSTITUTION:A face material 3 is bonded to the surface of a plywood 2 to form a face plywood, and a foam burried plywood 5 constituted of the middle heartwood punching plywood 6 punching more than 40% of the whole area is formed. After that, a buffer material is laid between the upper surface of the middle heartwood punching plywood 6 excluding the punch section and the face plywood 1. As the foam 7, polyolefin and polyurethane are desirable by relation to no occurrence of a squeak and the like from a contact section, and in case a cost is also considered as well as other facts, the polyolefin is particularly desirable.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wooden flooring material and a method for manufacturing the same, and more particularly to a wooden flooring material with excellent sound insulation properties and a method for manufacturing the same.

(Prior Art) Conventionally, carpets a have been applied directly to concrete slabs on the floors of mid-to-high-rise residences. However, when carpets are used, there are disadvantages in that it takes time and effort to replace the carpets and that dust mites are generated.

On the other hand, in recent years, as the suitability of wood materials for Japan's climate and the familiarity with the texture of wood have been reconsidered,
There is a growing trend towards using wood flooring.

However, since wood flooring has significantly poorer sound insulation properties than carpets, livability is significantly impaired especially when it is installed directly on a concrete slab, and it is also difficult to install it closely on an uneven concrete slab. It had the disadvantage that it was not possible.

Therefore, in order to solve the above-mentioned drawbacks, various proposals have been made to use a buffer material in any of the layers constituting the wooden flooring material or between the wooden flooring material and the concrete slab (for example, Publication No. 56-3945, No. 61-2210
No. 9, Utility Model No. 60-63628, No. 60-12105
No. 2 and No. 61-47339) put too much emphasis on the sound insulation performance of wooden flooring materials, and when the thickness of the cushioning material was increased,
When heavy items such as furniture are placed on the floor, the floor sinks locally, and each time the user walks, the floor rises and falls, resulting in a poor feeling of walking. Therefore, in order to solve this problem, the present inventors developed a flooring material for direct attachment in which a foam was embedded in the punched part of the core punched plywood, which was punched out over 40% of the total area on the underside of the decorative plywood. (Patent application No. 62-2247)
No. 6).

The present invention further improves the above-mentioned previous proposal from the viewpoint of sound insulation performance and productivity. That is, in the previous invention, the foam was embedded in the punched part of the core punched plywood so that the floor material was constructed so that the load from the floor was not directly applied to the foam itself. What is core punched plywood? Since the core punched plywood is directly bonded to the surface other than the punched part, noise is likely to be generated from the bonded surface, and the impact from the floor surface is transmitted to the concrete slab, causing damage even to concrete surfaces. There was room for improvement in the sound insulation performance since noise was easily generated. In addition, there is also a manufacturing disadvantage in that there is no method for embedding the foam in the punched portion of the core punched plywood at the same time as punching, which requires time and effort.

(Problems to be Solved by the Invention) As a result of further studies in order to solve the above-mentioned drawbacks, the present inventors have developed a method for making decorative plywood by laminating a cushioning material between decorative plywood and core punched plywood. It is possible to prevent the generation of impact noise from the bonding surface between the core punched plywood and the core punched plywood, and the impact noise from the floor surface does not reach the concrete slab, so the sound insulation performance can be greatly improved. By adhering the body to the back side of the decorative plywood and then pressing the decorative plywood and the core punched plywood, the foam is embedded in the punched part of the core punched plywood and at the same time, the core punched plywood is The present invention was achieved by discovering that it is possible to laminate a compressed foam between a decorative plywood and a decorative plywood as a cushioning material in one step.

Therefore, a first object of the present invention is to provide a wooden flooring material with excellent sound insulation performance.

A second object of the present invention is to provide a sound-insulating wooden flooring material for direct application that does not cause local settling or ups and downs when walking.

A third object of the present invention is to provide a method for manufacturing a sound-insulating wooden flooring material that is easy to manufacture.

(Means for Solving the Problems) The above aspects of the present invention consist of a core punched plywood in which 40% or more of the total area is punched out, and a decorative plywood laminated on the upper surface of the core punched plywood. A wooden flooring material, wherein the core punched plywood and the decorative plywood are bonded together via a cushioning material, and a foam is embedded in the punched part of the core punched plywood. This was achieved by a sound-insulating wooden flooring material and a method for producing the same.

Hereinafter, the structure of the present invention will be explained in detail along with its operation according to the drawings.

FIG. 1 is a cross-sectional view showing an example of the sound-insulating wooden flooring material of the present invention, and FIG. 2 is a sectional view showing the adhesion of decorative plywood and core punched plywood in the manufacturing process of the sound-insulating wooden flooring material of the present invention. It is sectional drawing which shows the state before (a figure) and after adhesion (b figure). In the figure, reference numeral (1) is a decorative plywood in which a decorative material (3) is adhered to the surface of a plywood (2).

Reference numeral (5) is a foam-embedded plywood consisting of a core punched plywood (6) punched out of 40% or more of the total area and a foam (7) buried in the punched portion.

Reference numeral (10) denotes a cushioning material interposed between the upper surface of the core punched plywood (6) excluding the punched portion and the decorative plywood (1).

The foam (7) can be appropriately selected from known materials such as polyolefin, polystyrene, polyurethane, etc., but polyolefin and polyurethane are preferable because they do not generate squeaking noises from the contact area, and are cost effective. Taking this into account, polyolefins are particularly preferred. Further, the foam (7) may be either closed cells or open cells, but open cells are preferable in order to allow the adhesive, which will be described later, to permeate through the foam. Further, the expansion ratio is preferably 10 times or more, particularly 40 times or more.

(Function) The foam-embedded plywood (5) has the function of blocking impact noise on the floor surface, and the core punched plywood (6) constituting the foam-embedded plywood (5) is This serves to support the load from the floor so that the foam (7) inserted into the cutout does not compress and deform due to the load from the floor and lose its performance as a sound insulating material. Therefore, the core punched plywood (6) is
The number and shape of the punched holes, the punched area, etc. can be selected as appropriate, taking into consideration the strength during use and the strength during manufacture, to the extent that the foam-embedded plywood (5) does not lose its role as a sound insulating material. The thickness can also be selected as appropriate. From the above point of view, the punched area of the core punched plywood (5) is within the range of 20 to 80% of the total area, and the thickness is set to 2.
．． It is preferable to set it within the range of 5-5 mm.

The cushioning material (10) is used to prevent sound generation from the adhesion surface between the decorative plywood (1) and the core punched plywood (6) excluding the punched portion, and to prevent floor impacts from being transmitted to the concrete slab. belongs to.

The material for such a cushioning material can be appropriately selected from rubber-like elastic bodies, nonwoven fabrics, felts, glass fibers, metal fibers and other fibrous materials, foams, or combinations thereof. In addition to or in place of these cushioning materials, a compressed body of the foam (7) can also be used as the cushioning material (10), as described later. That is, as will be described later, as the core punched plywood (6), it is also possible to use a punched plywood obtained by punching out a plywood to which a cushioning material has been bonded in advance together with the cushioning material, but it is also possible to use plywood without the cushioning material. Even in cases where the decorative plywood (1) is
By adhering the foam (40) to the back side of the core with adhesive and placing it on the core punched plywood (6) and pressing it, the foam (40) is inserted into the punched part. Made of foam (7)
At the same time, the pressed foam (40) is interposed between the core punched plywood (6) and the decorative plywood (1),
This acts as a buffer.

In this case, it is preferable that the adhesive reaches the core punching table vi (6) through the pressed foam (40), so it is preferable to use open-celled foam (40). preferable. Furthermore, since the adhesive preferably has elasticity even after curing, it is preferable to use a rubber-based, urethane-based, or ester-based adhesive.

FIG. 3 is a sectional view of another example of the sound-insulating wooden flooring material of the present invention.

Reference numeral (20) in the figure is a planar foam having plywood fins (2I) in the length direction.

Symbols (30) and (31) are protrusions and recesses for engaging the flooring materials.

When the sound-insulating wooden flooring material of the present invention is used as a so-called flooring type flooring material, it may be of the type shown in Figure 1, but when it is directly attached to a concrete slab, it is of the type shown in Figure 3. It is necessary. That is, sheet foam (
20) is a foam that functions as a buffer to adapt to the unevenness of the concrete slab surface and adhere to it when the sound-insulating wooden flooring material of the present invention is laid directly on the concrete slab, and is Thickness 2~ considering ups and downs etc.
It is preferable to set it as 3 mm and a foaming ratio of 5 to 30 times. The material for the planar foam (20) can be appropriately selected from known materials, but it is preferable to use polyolefin from the viewpoints of sound insulation performance, cost, durability, etc. In this case, in order to improve adhesion to the concrete slab surface, it is preferable to add an inorganic filler such as Lucium carbonate. The plywood fin (21) is made of planar foam (
20) is prevented from being completely compressed, and also constitutes a part of the connecting part when connecting the flooring units of the present invention.

Therefore, as long as it can substantially fulfill its role, it may be provided piecemeal along the sides.

The decorative material (3) may be a wood material such as veneer, a polymer material such as a so-called cushion floor, or a carpenter type material, but it may be suitable for adaptability to Japan's climate, aesthetic point of view, or Wooden materials are preferred from the viewpoint of ease of maintenance. In addition, from the viewpoint of the overall strength and life of the decorative board, the thickness of the plywood to which the decorative material (3) is bonded is preferably 2 to 5 mm, particularly preferably 2.5 to 3 mm.

In addition, there are convex portions (30) and concave portions (3) that engage the flooring materials.
The cross-sectional shape of 1) is arbitrary, but from the viewpoint of preventing liquid substances such as water from entering and ease of construction work, the joint of the vanity fffl (1) and the sheet foam (20) It is preferable to stagger the seams.

In addition, synthetic resin waterproof sheets (
22) may also be provided.

Although the shape of the sound-insulating wooden flooring material of the present invention can be appropriately designed and two or more shapes can be combined, a rectangular shape is particularly preferred. A rectangle is the basic shape when constructing a floor, but especially when the decorative material is wood, it is preferably 1 shaku (approximately 300 mm) wide and 6 shaku (approximately 1,800 mm) long.

Of course, dimensions that are multiples of this can also be adopted.

The sound-insulating wooden flooring material of the present invention can be appropriately manufactured by any known method, but the following method is particularly preferred because it can be manufactured easily and inexpensively.

That is, first, a decorative plywood (1) is prepared by adhering a decorative material (3) to a plywood (2), and an adhesive is applied to the back side of this decorative plywood (1) to form a plate-shaped foam (40). Glue.

Next, the aforementioned plate-shaped foam (4
Figure 2 (
See a)) Tighten. As a result, the foam (40) is buried in the punched part of the core punched board Fi (6), and at the same time, the back surface of the core punched plywood (6) and the vanity table Fi (1) excluding the punched part. The adhesive previously applied to the back side of the decorative plywood (1) penetrates into the pressed foam (40) and bonds the core punched plywood (6) and the decorative plywood (1). do.

According to the above manufacturing method, in the - step, the core punching joint Fi, (
At the same time, embedding the foam (7) in the punched part of 6),
A pressed foam (40) can be interposed as a cushioning material between the decorative plywood (1) and the core punched plywood (6) excluding the punched portion.

Another method for laminating the cushioning material (10) is to superpose the cushioning material on the plywood in advance in the process of producing the core punched plywood (6), and then punch it out with a punching machine to form the core punched plywood (6). 6), prepare the vanity table Fi(1) using the above method.
) can also be glued. In this case, the cushioning material (10)
consists of two layers: a cushioning material pre-glued to the core stamped plywood (6) and a foam bonded to the pressed decorative plywood (1), which essentially functions as a cushioning material.

(Effects of the Invention) As detailed above, the sound-insulating wooden flooring material of the present invention has a foam in the punched part of the core punched plywood, and the surface of the core punched plywood excluding the punched part and the decorative Since there is a cushioning material between the plywood and the plywood, not only will no sound be generated from the adhesive surface between the decorative plywood and the core punched plywood, but the impact sound from the floor will not be transmitted to the concrete slab, resulting in higher sound insulation performance. can demonstrate.

In addition, the foam embedded in the punched part of the core punched plywood does not receive any load from the floor, so it can maintain its effect as a sound insulation material over a long period of time and prevent local subsidence of the floor. No ups and downs when walking.

Furthermore, since the cushioning material between the decorative plywood and the core punched plywood can be provided at the same time as embedding the foam, manufacturing is easy.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

(Example) Thickness 0 on both sides of lauan 3-ply plywood with a thickness of 2.5 mm
．． 300mm x 1800mm glued with 3mm oak wood
We made decorative plywood.

On the other hand, 40% of the total area of plywood with the same dimensions and thickness of 2.5 mm
was punched out using a punching machine to produce core punched plywood.

Next, a vinyl acetate adhesive (product name: Konishi CEL-10 manufactured by Konishi Co., Ltd.) was applied to the back side of the decorative plywood, and an open-cell polyethylene foam (three-phase chemical ■ After gluing Niobium cell (product name: manufactured by Niobium Cell), it was superposed on the top surface of the core punched plywood, and after being pressed using a press, it was further attached to the back of the core punched plywood with the same dimensions and a thickness of 3°. A 5 mm sheet foam was adhered.

The sound insulating wooden flooring material of the present invention thus produced and the conventional sound insulating wooden flooring material were directly attached to the surface of a concrete slab by a known method, and the sound insulating performance of both was measured.
As shown in the figure, it has been demonstrated that the sound-insulating wooden flooring of the present invention exhibits higher sound-insulating performance than conventional sound-insulating wooden flooring. Furthermore, it was found that the center frequency of the octave band at this time was improved in a grade as shown in the following table.

of / / \ / / / / /

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of the sound-insulating wooden flooring material of the present invention, and FIG. 2 is a cross-sectional view showing the bonding of decorative plywood and core punched plywood in the manufacturing process of the sound-insulating wooden flooring material of the present invention. It is a sectional view showing the state before and after. FIG. 3 is a sectional view of another example of the sound-insulating wooden flooring material of the present invention. FIG. 4 is a diagram showing the floor impact sound blocking performance of the sound-insulating wooden flooring material of the present invention and the conventional sound-insulating wooden flooring material. l... Decorative plywood 2... Plywood 3... Decorative material 5... Foam embedded plywood 6... Core punched plywood 7... Foam 10... Cushioning material 20... Planar foam 21... Plywood fin 22... Synthetic resin waterproof sheet, convex portion 31... Concave portion, plate-shaped foam

Claims (1)

[Claims] 1) Core punched plywood (6
) and a decorative plywood (1) laminated on the upper surface of the core punched plywood (6), wherein the core punched plywood (6) and the decorative plywood (1) are laminated on the upper surface of the core punched plywood (6). A sound-insulating wooden flooring material, characterized in that the foam material (7) is bonded via a cushioning material (10), and a foam material (7) is embedded in the punched portion of the core punched plywood (6). 2) The wooden flooring material according to claim 1, wherein a planar foam (20) having plywood fins (21) is laminated on the lower surface of the core punched plywood (6) along at least one lengthwise side. The upper surface of the core punched plywood (6) is formed such that the core punched plywood (6) forms an engaging protrusion (30) and a recess (31) at both longitudinal ends thereof, respectively. Decorative plywood (1)
A sound-insulating wooden flooring material for direct attachment, characterized in that the sound-insulating wooden flooring material is fixed to a sheet foam (20) on the lower surface. 3) Apply adhesive to the back of the decorative plywood (1) and attach the foam (
40), the decorative plywood (1) with the foam (40) adhered to the top surface of the core punched plywood (6) is polymerized and compressed to form the core punched plywood (6). At the same time, the core punched plywood (6) excluding the punched portion and the decorative plywood (1) are buried through the pressed foam (40). A method for producing a sound insulating wooden flooring material characterized by adhesive bonding.