JPH07706U - Core material for laminated wood - Google Patents

Abstract

(57) [Abstract] [Purpose] Deformation of the glue and the core material of the laminated wood manufactured through the heating / drying process and cutting process may cause the laminated wood manufactured to the specified standard to become unsuitable for its use. There is a solution to the inconvenience. [Structure] A core material 1 made of natural wood is formed with cut portions 6 that divide the fibers 2 into a predetermined length in the longitudinal direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a laminated core material, and more particularly to a structure for preventing deformation of the core material.

[0002]

[Prior art]

 In general, wood or timber, which is used as a furniture material or a building material as a building material, is made up of timber. It was devised to solve the easiness. For example, the plate material is formed in a sandwich shape with a core material sandwiched between two plywood plates.

In the core material, however, conventionally, wood chips were added with an adhesive and heated and compressed to form a so-called board having a required thickness and a required area, and a decorative plate or the like was attached to the surface thereof. However, in recent years, this core material is made by stacking plate materials of a predetermined thickness so that the fibers are all in the same direction and bonding them with an adhesive, and after bonding, in the direction orthogonal to the fibers, that is, the fibers are shortened. Instead of using it after cutting it to a specified width.

Therefore, the conventional core material requires time and effort to bond a plurality of plate materials with an adhesive, heat, dry and cut into a required size.

[0005]

[Problems to be solved by the device]

 However, when the plywood is stuck with the core material sandwiched between them, it is usual to perform heating and drying processing together with the adhesive, so the core material may be deformed. Therefore, the bar or plate warps, and it may be necessary to cut it with a planer or the like to correct it when using.

[0006] However, if such a modification by cutting is performed, the plate material and the bar material made of the laminated wood are made in a predetermined standard size, so that the size becomes smaller than the predetermined size, so that they cannot be used, and as a result, It is uneconomical that there is nothing but to dispose of it as scrap material.

Therefore, the present invention has an object to provide a core material of a laminated material which is difficult to be deformed in order to eliminate such an uneconomical effect of the laminated material.

[0008]

[Means for Solving the Problems]

 The core material for laminated wood according to the present invention is characterized in that a core material made of natural wood is formed with a cut portion for dividing the fiber into a predetermined length in the longitudinal direction.

The notches are formed at regular intervals in the longitudinal direction of the core material and are alternately formed in the width direction, and the depth thereof is not more than half the thickness dimension of the core material. It is characterized in that natural wood is formed by forming notches having a predetermined length at predetermined intervals in a direction orthogonal to the fibers in the width direction alternately in the width direction.

[0010]

[Action]

 Since the fibers of the natural wood are divided in the longitudinal direction, even if the fibers try to shrink by heating and drying, they stay within the divided range, and the total length of the fibers does not shrink. Is less likely to occur.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the core material 1 is a plate material made of a natural material and having a predetermined width and length. The fibers 2 extend in the longitudinal direction, and the annual rings 3 formed by the fibers 2 are formed in the plate thickness portion 4. Has been done. On the surface 5 on one side or both sides of the core material 1, linear cut portions 6 each having a constant length are formed at predetermined intervals in the width direction and the length direction.

That is, for example, the notch 6 in the row A and the notch 6 in the row B are formed at regular intervals in the longitudinal direction of the fiber 2, but are displaced from each other by a half pitch, Further, the notch 6 in the row C is at the same position in the width direction as the notch 6 in the row A. Moreover, the intervals of the rows A, B, and C are arranged shorter than the length of the cut portion 6. Thus, the cut portions 6 of each row A, B, C ... Are formed so as not to be aligned in the width direction of the core material 1 and impair the strength of the core material 1.

It is a matter of course that the notch 6 may be manually formed with a tool such as a chisel, but for mass production, as shown in FIG. Blades 8 each having a predetermined length and a predetermined height are provided on the peripheral surface of the drum 7 so that the distance between the pair of drums 7 and 9 is equal to the wall thickness of the core 1 as shown in FIG. The core material 1 is rotatably supported while being held, and the core material 1 is inserted between the drums 7 and 9 in the longitudinal direction of the fiber 2 and extruded to form the core material 1. The height of the blade portion 8 is preferably less than half the thickness of the core material 1.

Therefore, when the notch 6 is formed in the core material 1, the front and back notches 6 and 6 are not aligned with each other to form a long hole in the core material 1. It is important to shift the positions of the notches 6 and 6. That is, it is necessary to shift the phases of the blade portions 8 and 8 of the drums 7 and 9. Thus, the fibers 2 of the core material 1 are cut at predetermined lengths in the longitudinal direction.

As shown in FIG. 2, plywoods 10 1, 10 are attached to both surfaces of the core material 1 thus processed, respectively. This pasting method may be a method of heating using an adhesive as in the conventional method. Therefore, even if the fiber 2 of the core material 1 contracts due to heating, the range is divided for each cut portion 6, so that the contraction of the fiber 2 over the entire length does not occur, and therefore the core material 1 is deformed. Practically hardly occurs. Therefore, even if a predetermined bar or plate is manufactured, there is no warp, there is no need to cut with a planer, and it can be used as it is as furniture or a building material.

Even when the plywood 10 is attached to only one surface of the core material 1, it is preferable to form the cut portions 6 on both front and back surfaces in order to prevent the core material 1 from being deformed.

[0017]

EFFECTS OF THE INVENTION According to the present invention described above, the fibers of natural wood are divided so that the contraction of the fibers in the longitudinal direction does not extend over the entire length, so that the wood is naturally easily deformed. The core material does not deform even after the heating and drying steps. Therefore, a so-called peeling material can be used as the core material without being manufactured as a laminated material as in the prior art, so that there is no need to manufacture the core material and it is economical. Further, since the peeling material can be used as the core material, it is possible to easily cope with the change in the wall thickness by adopting various thicknesses of the core material.

[Brief description of drawings]

FIG. 1 is a perspective view of a core material according to the present invention.

FIG. 2 is an exploded perspective view of a laminated material using a core material according to the present invention.

FIG. 3 is an explanatory view showing a method of manufacturing a core material according to the present invention.

FIG. 4 is a partial perspective view of FIG.

[Explanation of symbols]

 1 ... Core material, 2 ... Fiber, 6 ... Notch

Claims (3)

[Scope of utility model registration request] 1. A core material for laminated wood, characterized in that a core material made of natural wood is formed with cut portions for dividing the fibers into predetermined lengths in the longitudinal direction. 2. The core material for laminated wood according to claim 1, wherein the notches are formed at regular intervals in the longitudinal direction of the core material and are alternately formed in the width direction. 3. The core material for laminated wood according to claim 1, wherein the depth of the cut portion is not more than half of the thickness dimension of the core material.