JPS61163843A - Hollow laminate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a laminate having a hollow portion inside, and particularly relates to a veneer laminate cut to a small thickness using a veneer cutting machine such as a veneer lace or a veneer slicer. It relates to a core in which a plurality of plates are laminated with their fiber directions parallel and bonded to a veneer laminate, then bent in a direction perpendicular to the fibers and formed into a rectangular shape with a continuous cross section.

"Prior Art" Various laminates have been developed and proposed in which a core is formed by appropriately processing wood blocks, veneer veneers, paper, synthetic resins, etc., and the interior is hollow. In general, this type of laminate is lighter in weight than other laminates, and has excellent air insulation and soundproofing properties due to the hollow part, but on the other hand, it has poor bending, torsion, and compressive strength. It tends to be inferior.

For example, in the case where a wooden board divided into long strips is used as a crosspiece for the core part, and the crosspieces are divided and arranged in the width direction between the upper and lower members, there is something intervening between the rows of crosspieces to support the upper and lower members. Because it does not, the twisting and bending strength becomes weak,
Furthermore, the hollow portion lacks compressive strength.

In addition, when using a veneer veneer as a core, the properties of the veneer veneer to be cut differ depending on the grade of the raw wood, cutting conditions, etc., and the veneer itself has a certain degree of directionality due to its fibers. However, since it is extremely fragile, it is processed into a tubular or lattice shape and joined between the upper and lower members. However, if the clamping force becomes excessive during this joining,
It becomes difficult for the fibers to be deformed to form the desired hollow portions, and ultimately the fibers will break.

On the other hand, if the clamping force is too low, it may cause problems in the manufacturing process, such as poor adhesion.
It is poor in bending, twisting, etc., and has the disadvantage that the compressive strength varies even within a single laminate due to differences in the individual veneer veneers.

Furthermore, when paper processed into a honeycomb shape or roll core shape is used as the core, the paper itself is made of defibrated wood fibers, so compared to the veneer veneer described above, the fiber directionality is lost, but , machining becomes easy. However, since the strength of the core portion is significantly reduced, the materials of the upper and lower members, their weight, and the intended use are limited.

Furthermore, if the core is made of non-woody synthetic resin, it is easy to manufacture, but it is brittle in terms of torsion and bending strength, and it is difficult to cut, saw, etc. The intended use will also inevitably be limited.

[Problem to be solved by the invention J In view of the above, the present invention provides air insulation, sound insulation,
Not only is it expected to be lighter, but it also improves bending, torsion, and compressive strength, and facilitates product processability such as cutting and sawing.Furthermore, the material of the upper and lower parts can be made optional, expanding the range of uses. The aim is to

"Example" Below, an example of the present invention will be described based on the accompanying drawings.

In general, a laminated veneer material 3 in which an adhesive 2 is applied between a plurality of veneer veneers 1 and the fibers are bonded in parallel is manufactured by applying an adhesive 2 between multiple veneer veneers 1 and bonding the fibers in parallel. For example, locally existing knots, irregular wood grains, etc. are dispersed evenly to improve moisture resistance and strength in the fiber direction, and it is recognized as having straightness and rigidity in one direction. There is.

Therefore, based on this recognition, the veneer laminated material 3 is currently often used in places where large compressive loads are applied, such as scaffolding boards, floorboards, etc.

In the present invention, while utilizing the strength in the fiber direction, which is a characteristic of the veneer laminate material 3, we have broken down the conventional understanding of the veneer laminate material 3, and first, we have created a veneer that can be bent in the direction perpendicular to the fibers. The focus is on manufacturing the laminated material 3.

Thus, a plurality of veneer veneers 1 are laminated and bonded in parallel to the fiber direction to form a thin veneer laminate material 3, which is then bent in a direction perpendicular to the fibers to form a horizontal surface portion 4 and a vertical surface portion 5.
The cross section is processed to form a continuous rectangular shape 6 such that they are formed alternately at arbitrary intervals.

At this time, from the horizontal surface portion 4 to the vertical surface portion 5, and also from the vertical surface portion 5.
At each corner 7 oriented toward the horizontal surface 4, among the veneer veneers 1 of each layer, the fibers of the outer layer are stretched, and conversely, the inner layer is subjected to stress that causes the fibers to contract. It will be accompanied. However, if the adhesive 2 is a thin veneer laminate 3 in which the adhesive 2 is still in a semi-gelled state, each corner 7
The fibers of the veneer veneer 1 in each layer are not restrained from expanding and contracting by the adhesive 2, and stress is absorbed, so that processing into the rectangular shape 6 is facilitated.

Next, an adhesive 2 is applied to the thin veneer laminate 3 having a rectangular shape 6, or as shown in the figure, and the upper and lower sides are bonded and integrated to form a hollow laminate 10 having bonding strength over a certain range.
This is what you get.

When obtaining this hollow laminate 10, as shown in the illustrated example,
Twisting and bending the fiber direction of the veneer laminate material 3 that will become the core
It is advantageous to make it parallel to the direction in which the compressive load is applied. That is,
The laminated veneer material 3 has excellent strength in the fiber direction, and in addition, since the horizontal surface portion 4 and the slope portion 5 are continuously processed, it has further durability.

Furthermore, even for each load applied in the direction perpendicular to this, that is, the longitudinal direction of the horizontal surface portion 4, a certain strength can be obtained depending on the area of each continuous horizontal surface portion 4 and the height of the vertical surface portion 5. There is.

Note that the interval between the core layers of the hollow laminate 10 can be varied by determining the height of the vertical surface portion 5 depending on the intended use, and can also be adjusted by bending, twisting, and bending as required depending on the intended use. The compressive strength can be adjusted by appropriately adjusting the length of the horizontal surface portion 4.

The materials of the front surface member 8 and the back surface member 9 include general purpose board, formwork plywood, hardboard, particle board, etc., or wood materials overlaid with veneer, decorative paper, etc., plaster, cement, etc. or an inorganic material overlaid with decorative paper, metal foil, etc., as long as it can be processed according to its intended use.

For example, in FIG. 5, formwork plywood 11 is
A hollow laminate 1 in which the front member 8 and the back member 9 are specified as
According to this hollow laminate 10, in addition to the board strength of the formwork plywood 11, the bending, twisting, and compressive strength due to the rectangular 6-shaped veneer laminate 3 interposed in the hollow core part is obtained. In addition, if you replace this thick formwork plywood 11 with a thin general-purpose board of about 2.51E11 for the front member 8 and back member 9, it can be used as a construction material for walls, partitions, doors, etc. It can be widely used for furniture materials such as desks and low tables, and has excellent workability.

Furthermore, in the case shown in FIG. 6, among the above-mentioned inorganic materials, a front member 8 and a back member 9 are made of gypsum board 12, and the material is used for a ceiling plate and a wall material for the purpose of flame retardancy. According to this hollow laminate IO, the gypsum board 12
Although it has no directionality and is fragile, the rectangular 6-shaped laminated veneer material 3 interposed in the hollow core provides strength, making it easy to perform tasks such as winding, sawing, and construction at construction sites. Become.

"Effects of the Invention" As described above, according to the present invention, a plurality of veneer veneers with fiber directions parallel to each other are laminated and bonded to a veneer laminate, and then bent in a direction perpendicular to the fibers. The cross section is processed into a continuous rectangular shape so that the horizontal plane parts and the vertical plane parts are formed alternately at arbitrary intervals. Since it is glued and integrated with the core layer, the hollow part of the core layer can provide air insulation, sound insulation, and weight reduction, and the continuous rectangular veneer laminated material can provide mechanical strength in the fiber direction. It is.

In addition, since each of the rectangular slopes is continuous with each other via the horizontal surface, it is possible to create a hollow laminate with excellent bending, torsion, and compressive strength. By appropriately adjusting the length of the face portion and selecting the materials of the front member and back member, it is possible to arbitrarily mold a hollow laminate according to the intended use.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the adhesion process of laminated veneer material, Fig. 2 is a perspective view of laminated veneer material, Fig. 3 is a perspective view of a rectangular laminated veneer material, and Fig. 4 is an example of the present invention. FIG. 5 is a perspective view showing an embodiment, FIG. 5 is a front view showing another embodiment of the invention, and FIG. 6 is a front view showing another embodiment of the invention. DESCRIPTION OF SYMBOLS 1...Plywood veneer, 2...Glue, 3...Laminated veneer material, 4...Horizontal surface part, 5...Vertical surface part, 6...
Rectangular shape, 7... Corner part, 8... Surface member, 9... Back member, 10... Hollow laminate, 11... Formwork plywood, 1
2... Gypsum board patent applicant Taihei Seisakusho Co., Ltd. 3rd brother"

Claims (1)

[Claims] Multiple veneer veneers with parallel fiber directions are laminated, bonded to a veneer laminate, and then bent in a direction perpendicular to the fibers to form alternating horizontal and vertical surfaces at arbitrary intervals. A hollow laminate characterized in that the cross section is processed to have a continuous rectangular shape, and the horizontal plane parts located alternately above and below are integrated by being clamped between the facing surface member and back surface member. body.