JPH04366999A - Damping panel - Google Patents

Abstract

PURPOSE:To obtain the damping panel which is lightweight and superior in compressive and bending strength and has high damping performance. CONSTITUTION:A proper number of veneers 1 which have striped unevenness parts on the top and reverse surfaces are laminated and adhered by using a soft adhesive so that the unevenness parts are not fitted in each other, for example, in mutually orthogonal directions. In this cases, a damping material 2 may be sandwiched when the veneers 1 are laminated and adhered.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping panel that can be used on the floors of houses, schools, gymnasiums, etc.

0002

[Prior Art] Conventionally, damping panels used for flooring, etc., are often made by laminating damping material on a wooden substrate. material with a damping material made of a sheet-like material such as rubber on one side and a cushioning material made of a sheet-like material such as foamed synthetic resin on the other side (Japanese Patent Laid-Open No. 63-89775) No.), vibration damping material and wood materials were sequentially laminated on a substrate (Utility Model No. 62-
No. 190055), a cork board, a flexible sheet, a structural plywood, and a soft foamed plastic board were sequentially laminated (Utility Model Application Publication No. 119741/1983), a wood material layer, a high viscoelastic sheet layer, and a hard rubber layer were sequentially laminated. Things (Jitsukai 62-121
No. 360) etc. are known.

[0003] However, in these damping panels, since the flat layers are in contact with each other on the entire surface, the vibration propagation area is large, so even if damping material is sandwiched, sound propagation cannot be sufficiently absorbed. I can't.

[0004] In addition, a damping floor member (Jitsukai Sho. 64-272
No. 35) is also known. However, such a vibration damping panel still does not have a sufficient vibration damping effect.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a vibration damping panel which is lightweight and has excellent strength and damping properties, which solves the above-mentioned problems.

[0006]

[Means for Solving the Problems] According to the present invention, an appropriate number of veneers having striped concave and convex portions alternately on the front and back surfaces are bonded together using a soft adhesive so that the concave and convex portions of the veneers are fitted into each other. A damping panel characterized by being laminated and bonded so as not to overlap, especially,
The damping panel is characterized in that the veneers are laminated and bonded so that the striped concavo-convex portions are orthogonal to each other, and a damping material is further sandwiched between the veneers when the veneers are laminated and bonded. A vibration damping panel is provided.

That is, since the damping panel of the present invention is made by laminating and bonding veneers having alternating striped concave and convex portions, the hollow portions are located in a zigzag shape when viewed from the cross section; A part of the sound propagated from the surface is transmitted in a zigzag pattern through the base material, and the other part is transmitted from the base material to the hollow part, from the hollow part to the base material, and reaches other surfaces. During this time, the sound propagating through the base material is attenuated as it zigzags through the base material and passes through the soft adhesive or damping material, while the sound propagating from the base material to the hollow part, and from the hollow part to the base material, is attenuated. A part of the energy is reflected within the hollow part, and part of it is consumed as energy that vibrates the air within the hollow part, thereby exerting a vibration damping effect.

[0008] This will be explained in detail below. Examples of the material of the veneer having alternating striped concave and convex portions on the front and back surfaces of the damping panel of the present invention include agathis, apitone, capole, fir, spruce, cedar, and cypress.

[0009] The pitch of the uneven parts formed on the front and back sides of the veneer and the height of the convex parts are determined appropriately depending on the place where the damping panel is used, etc., but when laminating and adhering the veneers, it is important to It is necessary to prevent unevenness and inconsistency from occurring. or,
As for the method of producing veneer, it is more economical to cut raw wood etc. with a cutting blade, but it is not limited to this method. A method may also be used in which a long body having the same shape as the convex portion is attached to the substrate. In this case, the substrate and the elongated body may be made of different materials.

[0010] In order to stack and bond the veneers so that the uneven portions of the veneers do not fit into each other, the veneers may be laminated so that the convex portions of the veneers are, for example, parallel or perpendicular to each other.

[0011] In the lamination bonding of the veneers, various types of adhesives are used as the soft adhesive, such as water-soluble adhesives, solvent type adhesives, emulsion type adhesives, and hot melt type adhesives. Examples of raw materials include acrylic rubber, styrene-butadiene rubber, nitrile-butadiene rubber, chloroprene rubber, natural rubber, ethylene-vinyl acetate resin, petroleum resin, or mixtures thereof.

[0012] In the present invention, the damping material sandwiched between the veneers may be a nonwoven fabric, a synthetic resin foam such as polyethylene or polypropylene, a synthetic rubber foam such as butyl rubber or nitrile rubber, or a composite thereof. is used.

[0013]

Embodiments will be explained below based on the drawings. First, logs are cut with a cutting blade that is curved so that the blade shape seen from the cutting edge has alternating peaks and valleys, and the irregularities consisting of striped peaks and valleys shown in Figure 1 are created on the front and back surfaces. A veneer 1 having alternating layers is obtained. The method for producing the veneer is not limited to the method of cutting the raw wood as described above, but it is also possible to cut a plate-shaped body of an appropriate thickness to form alternately uneven parts on the front and back surfaces, or to form a long body with protrusions. There are methods of pasting. Next, as shown in FIGS. 2 to 5,
An appropriate number of the veneers 1 are glued with ethylene as a soft adhesive.
Using vinyl acetate resin, the uneven parts are laminated so that they do not fit into each other. Specifically, as shown in FIG.
Two veneers are bonded using ethylene-vinyl acetate resin as a soft adhesive, and a damping material (butadiene rubber foam) is sandwiched between the veneers 1 as shown in FIGS. 3 and 4, or As shown in FIG. 5, a damping material (butadiene rubber foam) is sandwiched between an appropriate number of the veneers 1, and the veneers are laminated and bonded so that the convex portions are orthogonal to each other, thereby producing the vibration damping panel of the present invention. Obtained.

[0014]

As described above, the vibration damping panel of the present invention is produced by laminating and bonding an appropriate number of veneers having alternating concave and convex portions on the front and back surfaces using a soft adhesive, or Furthermore, since a damping material is sandwiched between them, it is lightweight and has excellent vibration damping properties. Furthermore, since the hollow portions 3 formed by the recesses of the veneer are located in a zigzag shape in the cross section of the laminate, even higher vibration damping can be achieved in addition to the damping effect of the soft adhesive or damping material. It is something that brings. Furthermore, since the convex portions of the veneers constituting the laminate have a bridging effect, they exhibit high compressive strength and bending strength. Furthermore,
The apparent thickness of a veneer having alternating concave and convex portions on its front and back surfaces is thicker than the actual thickness of the veneer by the depth of the concave portions, which increases the yield and contributes to a reduction in unit cost.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of a single plate constituting a damping panel of the present invention.

FIG. 2 is a partially enlarged cross-sectional view of a vibration damping panel of the present invention in which veneers are laminated and bonded.

FIG. 3 is an enlarged cross-sectional view of a damping panel of the present invention in which a damping material is sandwiched between veneers.

FIG. 4 is a partially enlarged cross-sectional view of another damping panel of the present invention in which a damping material is sandwiched between veneers.

FIG. 5 is a perspective view of a vibration damping panel according to the present invention in which veneers are laminated and bonded so that the convex portions of the veneers are orthogonal to each other.

[Explanation of symbols]

1　Veneer 2. Damping material 3 Hollow part

Claims (3)

[Claims] Claim 1: A suitable number of veneers having alternating striped concave and convex portions on the front and back surfaces are laminated and bonded using a soft adhesive so that the concave and convex portions of the veneers do not fit into each other. vibration damping panel. 2. The damping panel according to claim 1, wherein a suitable number of said veneers are laminated and bonded so that the striped concave and convex portions of said veneers are orthogonal to each other. 3. The damping panel according to claim 1 or 2, wherein a damping material is sandwiched when an appropriate number of said veneers are laminated and bonded.