JPS61154835A - 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 to a laminate having a small thickness cut by a veneer cutting machine such as a veneer lace or a veneer slicer. This invention relates to a core in which veneers are laminated with their fiber directions crossing each other and bonded to a bendable thin plywood board to form a continuous rectangular cross section.

"Prior Art" Various laminates have been developed and proposed in which a core is formed by appropriately processing wood boards, 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 portion, but on the other hand, it tends to have poor bending, torsion, and compressive strength. becomes.

For example, if wooden boards divided into long strips are used as crosspieces in the core part, and these crosspieces are arranged in the width direction between the upper and lower members, there is nothing intervening between the rows of crosspieces to support the upper and lower members. Therefore, the torsional and bending strength becomes weak, and the hollow portion also 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 will not only cause problems in the manufacturing stage such as poor adhesion, but also reduce the strength of the core.
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 will be easier to manufacture, but it will be brittle against twisting and bending strength, and there will be difficulties in cutting, sawing, etc. The uses will also inevitably be limited.

"Problems to be Solved by the Invention" In view of the above, the present invention provides air insulation, sound insulation, and
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.

Generally, plywood 3 is made by applying adhesive 2 to a plurality of veneer veneers 1 and laminating and bonding them with their fiber directions crossing each other. It is recognized that it has a certain straightness and rigidity by getting rid of the straightness and obtaining directionality in the vertical and horizontal directions. is manufactured to meet the requirements, and as a result, its minimum thickness is currently determined to be around 2.5 MW.

In the present invention, breaking down the conventional recognition of these plywood 3, although it has mechanical strength in the vertical and horizontal directions,
Ignoring a certain level of rigidity, I first focused on manufacturing a bendable thin plywood 3.

Then, the fiber directions of the veneer veneer 1 are crossed and laminated and bonded to form a thin plywood 3, which is successively bent so that the horizontal surface portion 4 and the vertical surface portion 5 are alternately formed at arbitrary intervals, and the cross section is It is processed to form a continuous rectangular shape 6.

At this time, at each corner portion 7 oriented from the horizontal surface portion 4 to the vertical surface portion 5, and vice versa, from the vertical surface portion 5 to the horizontal surface portion 4,
Among the veneer veneers 1 of each layer, the fibers of the outer layer are elongated, and conversely, the inner layer is subjected to stress that causes the fibers to contract. However, if the adhesive 2 is a thin plywood 3 that 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, this thin plywood 3 having a rectangular shape 6 is interposed with a front surface member 8 and a back surface member 9, and is physically fixed to each horizontal surface portion located alternately above and below with a stapler or the like, or by adhesive bonding as shown in the figure. An integrated hollow laminate 10 is obtained by applying the agent 2 and sandwiching it vertically.

According to this hollow laminate 10, since the surface member 8 and the back member 9 and each horizontal surface portion 4 have joints over a certain range, a firm joint base is obtained.
Each horizontal surface portion 4 and vertical surface portion 5 are continuously processed from thin plywood 3 to have excellent torsion and bending strength in the longitudinal direction as well as compressive strength in a direction perpendicular to this. Therefore, it is durable.

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, among the wood materials mentioned above, formwork plywood 11
Hollow laminate 1 with specified surface member 8 and back member 9
0 is shown, and according to this hollow laminate 10, in addition to the plate strength of the formwork plywood 11, bending, torsion, and compressive strength can be obtained by the rectangular thin plywood 3 of the rectangular shape 6 interposed in the hollow core. . In addition, if instead of this thick formwork plywood 11, a thin general-purpose board of about 2.5 f1 is used for the front member 8 and back member 9, construction materials such as wall materials, partitions, doors, etc. Of course,
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 ceiling materials and wall materials for the purpose of flame retardancy. According to this hollow laminate 1o, the gypsum board 12
Although it has no directionality and is fragile, the rectangular thin plywood 3 interposed in the hollow core provides strength, and operations such as handling, sawing, and construction at a construction site are facilitated.

"Effects of the Invention" As described above, according to the present invention, a plurality of veneer veneers are laminated with their fiber directions crossing each other, and while being bonded to a thin plywood with a bendable thickness, The cross section is processed to have a continuous rectangular shape so that the surface parts are formed alternately at arbitrary intervals, and each horizontal surface part located alternately above and below is bonded between the facing surface member and back surface member. Since it is integrated, the hollow part of the core layer can provide air insulation, sound insulation, and weight reduction, and the continuous rectangular thin plywood can provide mechanical strength in the cross direction.

In addition, since the rectangular vertical planes are continuous with each other via the horizontal plane, a hollow laminate with excellent bending, twisting, and compressive strength can be obtained, and the height of the vertical planes is
By appropriately adjusting the length of the horizontal surface portion and selecting the materials for the front and back members, it is possible to manufacture any hollow laminate depending on the intended use.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the plywood bonding process, FIG. 2 is a perspective view of plywood, FIG. 3 is a perspective view of rectangular thin plywood, and FIG. 4 is a perspective view showing an embodiment of the present invention. FIG. 5 is a front view showing another embodiment of the invention, and FIGS. 6A and 6B are front views showing other embodiments of the invention. 1...Plywood veneer, 2...Adhesive, 3...Thin plywood,
4...Horizontal surface part, 5...Vertical surface part, 6...Rectangular shape,
7... Corner part, 8... Surface member, 9... Back member, 1o... Hollow laminate, 11... Formwork plywood, 12...
・Gypsum board, patent applicant: Taihei Seisakusho Co., Ltd.

Claims (1)

[Claims] Multiple veneer veneers are laminated with the fiber directions crossing each other and bonded to a thin plywood board with a thickness that allows it to be bent.
The cross section is processed to have a continuous rectangular shape so that horizontal and vertical surfaces are formed alternately at arbitrary intervals, and each horizontal surface that is alternately located vertically is placed between the facing surface member and back surface member. A hollow laminate characterized by being integrated by being sandwiched between.