JPH0752110A - Laminated lumber having large section - Google Patents

Abstract

PURPOSE:To provide a laminated lumber having a large section, which is capable of utilizing thinned-out timbers, not grown yet, effectively, easy in manufacturing and provided with a desired strength. CONSTITUTION:First laminas 11A1-11A6, provided with a predetermined thickness and a width same as the width W of a laminated lumber, are produced from grown timbers (spruce, for example) while second laminas 12 are produced by not yet grown thinned-out timbers (cedar, for example) having the same thickness as the same of the first lamina and a width w1 narrower than the width W of the laminated lumber, and a plurality of second laminas 12 are arrayed so as to obtain divided lamina layer having the same width as the laminated lumber Then, the first lamina is laminated onto the second lamina so that one or more divided lamina layers are existing between the plurality of first laminas 11A1-11A6 while a multitude of laminas are bonded through adhesive agent layers Ba1, Ba2. The adhesive agent layer Ba2 on jointing surfaces can be omitted if necessary. According to this method, the laminated lumber, having desired tension, compression and bending strengths, can be obtained even when the laminas 12, made by the thinned-out timber and having narrower width than the laminated lumber, are employed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated lumber with a large cross section, and more particularly to a laminated lumber with a large cross section formed by using a lamina made of raw timber (thinned timber) and a lamina made of raw timber. .

[0002]

2. Description of the Related Art In recent years, laminated wood has been actively used in the construction field. (i) Laminated lumber with a large cross section for structure has grown to a predetermined thickness, that is, a torchwood of an adult tree is ground to a width of 20 cm.
~ 22 cm, thickness 2.5 ~ 5 cm about lamina is manufactured, the lamina is aligned parallel to the longitudinal direction (fiber direction) and stacked, and an adhesive layer is provided between the bonding surfaces to integrally form It is made by joining. (ii) Also, many proposals have been made to manufacture plywood or laminated lumber using ungrown log (that is, thinned timber) that has not grown to a predetermined thickness (Actually No. 61-31811).
Japanese Utility Model Publication No. Sho 63-144204).

[0003]

The large-section laminated wood of the above (i) is used for constructing a large-span building structure, and the large-section laminated wood generally needs to have a width of 20 cm or more. , North American torchwood is widely used as timber for this width. However, recently, in Canada and the United States as well, from the standpoint of nature conservation, the supply of vegetation has begun to run short and prices are skyrocketing, so the laminated wood of (i) above has become expensive. There is a drawback that As mentioned in (ii) above, a large number of plywood and laminated lumber that use undeveloped thinned wood have been proposed, but the thinnest timber has a width of at most 1.
Since only lamina of about 0 cm can be produced, the methods proposed so far can produce plywood and structural laminated lumber with a small span, but with lamina produced from undeveloped thinned wood, a large span can be produced. However, there is a drawback in that it is not possible to manufacture a laminated lumber having a large cross section that can be used as the structural material. The problem to be solved by the present invention is to provide a laminated lumber with a large cross-section that does not have the drawbacks of conventional laminated lumber, in other words, it is possible to effectively use ungrown thinned timber,
It is an object to provide a laminated member having a large cross-section that is easy to manufacture and has a desired strength.

[0004]

The present invention adopts the following configuration as a means for solving the above problems. According to the configuration of the present invention, the first lamina having a width substantially the same as the width of the laminated lumber and having a predetermined thickness is made of raw log of the adult tree, and the thickness is substantially the same as the thickness of the first lamina and the width is the same. A second lamina, which is narrower than the width of the laminated timber, is made from raw timber, and by arranging the second lamina to form a divided lamina layer having approximately the same width as the laminated lumber The first lamina and the second lamina are superposed so that there is one or more divided lamina layers between the first lamina of the above, and each lamina is bonded with an adhesive. It is in laminated wood of cross section. Laminated wood with a large cross section needs to be manufactured using a lamina made of a log of a tree species having a high allowable stress and Young's modulus in the fiber direction. Therefore, in a preferred embodiment, as a raw wood of an ungrown tree, a thinned timber which is available at a low price is used, and a spruce as a raw wood of a matured tree in which Young's modulus in the allowable stress and the fiber direction is irritated, A large cross-section laminated lumber is produced using raw logs of Sugi, Bai Too, Ezomatsu, Todomatsu, Benimatsu or fir tree. The first lamina used for laminated lumber with a large cross section has the same width as the laminated lumber, and the length is the length of the laminated lumber
It is manufactured by processing so that the thickness becomes 1 / integer (the number of lamina in the forming direction) of the formation (thickness) of the laminated wood. In the embodiment, an example in which the first lamina is composed of an integrated plate having a width substantially the same as that of the laminated wood formed by grinding the raw wood, the raw wood is ground to form a plate having a width substantially the same as that of the laminated wood. The first lamina may be manufactured by joining two or more plate materials in the fiber direction with a fingaker joint or a scarf joint and making their lengths substantially equal to the length of the laminated wood.

Laminated wood with a large cross section is made by stacking at least three first lamina, and between the first lamina,
At least one split lamina layer including the second lamina is present. Since the second lamina is made by processing ungrown raw wood, a plate whose length is shorter than the length L of the laminated wood is made in advance, and two or more of the plate are made in a fiber direction. Join with a car joint or scarf joint, and make the length approximately equal to the length of the laminated wood. However, if the ungrown logs (thinned timber) are long, they may be made of one piece. If you want to introduce pre-stress into laminated wood with a large cross section, you can arrange two or more second lamina to form a separate lamina layer with approximately the same width as the laminated wood, and use one or more rods made of foamed resin. Two or more second lamina are arranged to form a divided lamina rod body layer having a width substantially the same as that of the laminated wood, and one layer is formed between the first lamina or the divided lamina layers constituting the laminated wood.
The first lamina, the second lamina, and the rod body are stacked so that the above-mentioned divided lamina rod layer exists, and the lamina and the like are bonded with an adhesive. Laminated material consisting of a large number of lamina, etc. is usually joined with adhesive on the surfaces of the lamina, rods, etc. facing each other, but the width of the lamina (width joint surface) is not joined with adhesive. May be good. The divided lamina layer is formed by arranging, for example, two or three second lamina having a width of ½ to ¼ of the width of the laminated wood. The thinned lumber that is 40 to 50 years old (about 25 cm in diameter) is generally
It has few uses, is available at a low price, and is advantageous in terms of cost.
In addition, spruce wood from Northern Europe can be obtained at the same low price as thinned lumber from Sugi, but it has a slightly higher strength and rigidity than lumber, so the first lamina is made of spruce wood, and the second If a lamina with a large cross section is made by using lamina made of sugi thinned wood, it is possible to provide a large cross section with a desired strength at a relatively low cost.
Further, in a preferred embodiment, the end edges (width joint surfaces) of the second lamina facing each other are formed into an uneven surface that is perpendicular to the upper and lower surfaces of the second lamina, and one of the facing surfaces. The uneven surface of the lamina and the uneven surface of the other lamina can be closely joined. Then, the proof stress against lateral bending can be increased.

[0006]

EXAMPLE Example 1 is shown in FIG. 1, and is a laminated lumber 10A in which lamina 11 made of ordinary (adult) spruce wood and lamina 12 made of thinned wood of Akita Sugi are alternately laminated and joined.
Is an example of. Laminas 11A1 to 11A6 are made of European spruce logs, and the width is the width W (for example, 21 cm) of the laminated wood after completion, and the length (length in the fiber direction) is the laminated wood after completion. Becomes a length L (for example, 10 m), and the thickness h is 1 / (the number of lamina in the vertical direction) of the total H of the laminated wood after completion (for example, h = H / 11 = 27.5 /
11 = 2.5 cm) to be processed. The lamina 11 is made of an integral plate obtained by grinding a spruce log. The lamina 11A1 to 11A6 are made by laminating spruce raw wood, and joining two or more plates having a thickness h and a width W with a finger car joint or a scarf joint in the fiber direction to obtain a laminated lumber. The length L may be made substantially equal to the length L. The lamina 12 is made by grinding a log of thinned wood from Akita-sugi and has the same thickness h as the lamina 11 and a width w _1.
Is half the width W of the laminated wood (for example, W / 2 = 10.5 cm when W is 21 cm), and the length (length in the fiber direction) is the length of the laminated wood after completion. A plate material shorter than L is made, and two or more of the plate materials are joined in the fiber direction with a finker joint or scarf joint, and the length thereof is made substantially equal to the length L of the laminated lumber. .

As shown in FIG. 1, two lamina 12 are aligned on the lamina 11A1 in the lengthwise direction (fiber direction) to form a divided lamina layer. Laminas 11A2 are aligned in parallel with each other on the lamina 12 in the longitudinal direction, and two lamina 12 are aligned in the longitudinal direction and laminated on the lamina 11A2. Laminas 11A3 through 11A6 and lamina 12 are stacked in the same manner. Adhesive layers Ba ₁ and Ba ₂ are provided between the lamina surfaces of the respective lamina facing each other. Then, the opposing surfaces of the lamina are pressed into contact with each other and integrally joined to each other to manufacture a laminated member 10A having a rectangular large cross section.
Laminated wood 10A of Example 1 is lamina 11A1-11A6 having the same width W as the laminated wood made of European spruce.
And a lamina 12 of 1/2 width w _{1 that} is the width of a laminated lumber made of thinned lumber made in Japan of Akita Sugi that belongs to the same classification as spruce as a tree species are laminated and crimped on each other. Since the spruce of is a sticky tree species, it is possible to firmly integrate the lamina 12 of 1/2 width w ₁ made of thinned wood in Akita-sugi.

Example 2 is an example of a laminated lumber 10B shown in FIG. 2, in which the above-mentioned lamina 11A1 to 11A6 made of ordinary spruce and the lamina 13 made of thinned timber of Akita Sugi are alternately laminated. The lamina 13 is different from the lamina 12 in that the width w _{2 is set} to 1/3 of the width W of the laminated wood after completion (for example, W / 3 = 7 cm when W is 21 cm), but other Is the same as Lamina 12. Figure 2
As shown in, the three lamina 1 on the lamina 11A1
3 are aligned in the length direction and overlapped to form a divided lamina layer. Lamina 11A2 is laminated on those lamina 13 with the lengthwise directions thereof aligned in parallel, and three lamina 1 is laminated on lamina 11A2.
Align 3 in the length direction and stack. Lamina 1 in the same way
Overlay 1A3 through 11A6 and lamina 13. Adhesive layers Ba ₁ and B are provided between the lamina surfaces of the lamina facing each other.
a ₂ is provided. Then, the opposing surfaces of the lamina are pressed into contact with each other and integrally joined to form the laminated laminated member 10B having a large rectangular cross section. Laminated wood 10B of Example 2 is lamina 11A1 having the same width W as the laminated wood made of European spruce.
1/3 of the width of the laminated timber made from 11A6 and domestic Akita-sugi thinned timber belonging to the same classification as spruce
Lamina 13 of width w ₂ is layered on top of each other and pressure-bonded. Since European spruce is a sticky tree species, 1/3 width w ₂ lamina 13 made of thinned timber from Akita Sugi is firm. Can be integrated.

Example 3 is shown in FIG. 3 and is composed of ordinary spruce lamina 11A1-11A7 (lamina 11A).
7 is the same as lamina 11A1) and laminated lumber 10 in which lamina 13 and 14 made of thinned wood from Akita-sugi are alternately laminated and joined.
It is an example of C. The lamina 14 is made by grinding a log of thinned timber in Akita-sugi, the thickness h is the same as that of the lamina 11, and the width w ₃ is _2/3 of the width W of the laminated lumber (for example, when W is 21 cm, 2W / 3 = 14 cm), and make a plate whose length is shorter than the length L of the laminated wood after completion, and join two or more of the plates in the fiber direction with a scarf joint or a fingaker joint. , Its length is made substantially equal to the length L of the laminated laminated wood after completion. As shown in FIG. 3, the lamina 11A
Lamina 13 and 14 are aligned and laminated on 1 in the longitudinal direction to form a divided lamina layer. On top of these lamina 13, 14,
Align and stack the lamina 11A2. Lamina 13 and 14 are arranged on and parallel to the lamina 11A2 in parallel with the length direction. Laminas 11A3 through 11A7 and lamina 13, 14 are stacked in the same manner. Adhesive layers Ba ₁ and Ba ₂ are provided between the surfaces of the lamina facing each other. Then, the opposing surfaces of the lamina are brought into pressure contact with each other and integrally joined to form a laminated laminated member 10C having a rectangular large cross section.

Example 4 is an example of a laminated lumber 10D shown in FIG. 4, in which lamina 11A1 to 11A5 made of ordinary spruce and lamina 12 and 13 made of thinned timber of Akita Sugi are alternately laminated. As shown in FIG. 4, lamina 1
1A1 is laminated with three lamina 13 aligned in the lengthwise direction to form a divided lamina layer, and two lamina 12 is aligned with these lamina 13 in the lengthwise direction to form a divided lamina layer. . Then, on top of these lamina 12, lamina 1
Align and stack 1A2 in parallel. Lamina 1 in the same way
Stack 2, 3 and lamina 11A3 to 11A5.
The adhesive layers Ba ₁ and B are provided between the surfaces of the lamina facing each other.
a ₂ is provided. Then, the opposing surfaces of the lamina are pressed into contact with each other and integrally joined to each other to form a rectangular laminated laminated member 10D.

Example 5 is an example of a laminated lumber 10E shown in FIG. 5, in which lamina 11A1 to 11A4 made of ordinary spruce and lamina 12 and 13 made of thinned timber of Akita Sugi are alternately laminated. As shown in FIG. 5, lamina 1
The three lamina 13 are aligned in the lengthwise direction on 1A1 to form a divided lamina layer, and the two lamina 12 are aligned on the lamina 13 in the lengthwise direction to form a divided lamina layer. Then, three lamina 13 are aligned and stacked in the length direction on these lamina 12, and lamina 11A2 is aligned and stacked on this lamina 13 in parallel. in the same way,
Lamina 12, 13 and lamina 11A3 through 11A4 are overlaid. Adhesive layers Ba ₁ and Ba ₂ are provided between the lamina surfaces of the respective lamina facing each other. Then, the facing surfaces of the lamina are pressed into contact with each other and integrally joined to form a long laminated member 10E having a rectangular cross section.

Example 6 is shown in FIGS. 6 and 7, in which lamina 21A1 to 21A8 made of ordinary spruce, lamina 22, 23 and 24 made of thinned wood of Akita-sugi, and square bar 25 made of expanded polystyrene are stacked. Bonded laminated wood 2
This is an example of 0F. Laminas 21A1 to 21A8 have the same width as the width W (for example, 23 cm) of the laminated lumber after completion and the length L (for example, 10 m) of the laminated lumber after completion. The same as the above, and the thickness h is set to 1 / (the number of laminas in the H direction) of the formed H of the laminated wood (eg, h = H / 21 = 52.5 / 21 = 2.5 cm). It is processed and manufactured to become. This lamina 21A1-21
A8 is made by grinding a spruce log and forming an integral plate. The lamina 21A1 to 21A8 are two or more plates each having a thickness h and a width W made by grinding a spruce wood log.
They may be joined in the fiber direction with a finger joint or scarf joint, and the length may be made substantially equal to the length L of the laminated wood after completion. Lamina 22 has the same thickness h as lamina 21 obtained by grinding thinned lumber of Akita-sugi, and width w ₄ is _{3 which} is the width W of the laminated wood after completion minus twice the thickness h. 1 / [for example, (W-2h) / 3 = 6 cm when W is 23 cm and thickness h is 2.5 cm] and the length is shorter than the length L of the laminated wood after completion. 2 of this plate material
The above is joined in the fiber direction by a finger joint or a scarf joint, and the length is manufactured to be approximately equal to the length L of the laminated wood after completion.

The lamina 23 is obtained by grinding the raw wood of thinned wood in Akita-sugi and the thickness h is the same as that of the lamina 21A1 to 21A8.
The width w ₅ is a value obtained by subtracting twice the width w ₄ of the lamina 22 from the width W of the laminated lumber after completion [for example, W is 23 cm and w ₄ is 6 cm.
In the case of 11 cm], the length is L of the laminated wood after completion
Make a shorter plate, and make two or more of this plate,
Bonding is performed in the fiber direction with a finger joint or a scarf joint, and the length is manufactured to be approximately equal to the length L of the laminated wood after completion. The lamina 24 is made by grinding a thinned lumber of Akita-sugi, the thickness h is the same as that of the lamina 21A1 to 21A8, and the width w ₆ is half the width W of the laminated lumber after completion [for example, W is 23 cm. In the case of 11.5 cm], a plate whose length is shorter than the length L of the laminated wood after completion is made, and two or more of these plates are joined in the fiber direction with a finger joint or scarf joint. Then, the length is made substantially equal to the length L of the laminated laminated wood after completion to manufacture. The square rod 25 is
Laminated 21A1 to 21A8 by processing Styrofoam,
A regular square rod having a thickness h of 22, 23, and 24 as one side is produced, and the regular square rod is cut or connected to a length L (for example, 10 m) of a laminated laminated body after completion to be manufactured.
As shown in FIG. 6, three lamina 22 and two square rods 25 are aligned in the longitudinal direction on the lamina 21A1 and stacked to form a divided lamina rod layer. These lamina 22 and square rod 25
Lamina 21A2 is aligned in the lengthwise direction and stacked, and three lamina 22 and two square rods 25 are stacked in the lengthwise direction on these lamina 21A2.
And the lamina 21A3 is aligned on the square rod 25 in the longitudinal direction and stacked. On the lamina 21A3, two lamina 22 and one lamina 23 are aligned in the longitudinal direction and stacked to form a divided lamina layer, and two lamina 24 are longitudinally arranged on these lamina 22 and 23. The two lamina 22 and the one lamina 23 are aligned and stacked in the length direction on the lamina 24, and the lamina 2 is placed on the lamina 22 and 23.
Align and stack 1A4 parallel.

Laminas 22, 23, 24 and lamina 21A5, 21A6 are stacked in the same manner. Lamina 21A6
Between Lamina 21A8 and Lamina 21A1 and Lamina 2
Lamina 22, square bar 25 and lamina 21A7 are stacked in the same manner as between 1A3. Adhesive layers Ba ₁ and Ba ₂ are provided between the surfaces of the lamina facing each other. Then, the facing surfaces of the lamina are pressed into contact with each other and integrally bonded to each other to form a rectangular laminated member 10F having a large cross section. In addition, lamina 21A2
Alternatively, the lamina 21A7 may be replaced with a divided lamina layer composed of two lamina 24. In the laminated material 10E, it is possible to form a through hole 26 through which a PC steel rod or a PC steel rope is passed by melting the square rod 25 by screwing it into a portion in which the square rod 25 made of styrofoam is embedded while rotating the heating drill. it can. Prestressing can be easily introduced into the laminated member 10E by passing a PC steel rod or a PC steel rope through these through holes 26 and introducing a tensile force to the PC steel rod or the PC steel rope by an appropriate means. The heating drill has a heating element attached to the tip of a long shaft so that the heating drill can be moved while rotating the shaft.

Example 7 is shown in FIG. 8 and is an example of the shape of the edge (width joint surface) of the lamina 12 to 14 and 22 to 24 made of thinned wood from Akita-sugi. As shown in FIG. 8, the lamina 12 to 14 and 22 to 24 of Examples 1 to 6 described above have the facing edges (width joint surfaces).
-14, 22 to 24 are processed into corrugated corrugated surfaces at right angles to the upper and lower surfaces, and the corrugated corrugated surface of one lamina edge is closely joined to the corrugated corrugated surface of the other lamina edge. It can be so. As the unevenness, for example, a waveform in which a large number of small arcs are connected by a short straight line as shown in FIG. 8 can be used, but other unevenness may be used. The uneven surface is formed by machining. As in Example 7, by joining the corrugated surface of one lamina and the uneven surface of the other lamina,
Stacking a large number of laminas increases the mutual shearing force of laminas made from thinned wood from Akita-sugi. Therefore, even if it is a laminated timber made using a narrow lamina, it has almost the same resistance to lateral bending as the laminated timber made using only lamina made of an integral plate material with the same width as the laminated timber. You can expect durability. In Examples 1 to 6, the specific dimensions of the lamina 12 to 14 and 22 to 24 are described. However, the examples of dimensions are merely for the sake of clarity, and do not limit the structure of the laminated material of the present invention. In Examples 1 to 6, a large number of lamina and the like are provided between the surfaces facing each other with the adhesive layers Ba ₁ and B ₁ .
Although the example in which a ₂ is provided and joined is described, the adhesive layer Ba ₂ provided on the width padding surface (width joint surface) is not essential,
It can be omitted if necessary. The laminated materials 10A to 10E of Examples 1 to 5 can be used, for example, as columns or beams of buildings. Laminated wood 10 of Example 6
F may be used as a beam in a building.

[0016]

The present invention has the following effects (a) to (e) by having the structure described in the claims. (A) In the laminated lumber having a large cross section according to claim 1, a first lamina having a width substantially the same as the width of the laminated lumber and having a predetermined thickness is made from a raw log of an adult tree, and the first lamina has a thickness. The second lamina is made from raw wood of undeveloped wood and has a width that is approximately the same as the thickness of the laminated wood and is narrower than the width of the laminated wood, and by arranging the second lamina, it becomes a divided lamina layer of about the same width as the laminated wood, Since the first lamina and the second lamina are overlapped so that there is one or more divided lamina layers between the plurality of first lamina constituting the laminated wood, and each lamina is bonded with an adhesive. Even if a laminated lumber is made by using the second lamina narrower than the width of the laminated lumber made from raw timber, the tensile strength, compression and bending strength of the laminated lumber in the main axis direction are not impaired. Therefore, it is possible to effectively use the raw tree of the unfinished tree, that is, the thinned wood. (B) According to the second aspect of the present invention, the lumber from thinning can be obtained at a low price, so that a laminated lumber having a desired strength and a large cross section can be provided at a relatively low cost. The tree species constituting the first lamina and the tree species constituting the second lamina depend on the allowable stress level and the Young's modulus in the fiber direction. The laminated material having a large cross section can be firmly integrated and has a desired strength. (C) According to claim 3, the thinned lumber that is too thin can be obtained at a low price, and the spruce wood produced in Northern Europe can also be obtained at a relatively low price. Therefore, the cost of the laminated lumber with a large cross section can be reduced. You can In addition, since the spruce that constitutes the wide first lamina is slightly stronger and more rigid than the sugi and has a stickiness, it has the effect of firmly integrating the narrow second lamina made of the sugi thinning material. There is. (D) According to claim 4, the portion of the laminated material in which the foamed resin rod body is embedded can easily form a through hole through which a PC steel rod or a PC steel rope is passed by a heat drill, and thus the laminated material. It becomes easy to introduce prestress to. (E) According to claim 5, even if the laminated lumber has a large cross section and is made by using the narrow second lamina, only the lamina made of an integrated plate material having the same width as the laminated lumber is used. It is possible to expect the proof stress which is almost the same as the proof stress against lateral bending of the produced laminated wood.

[Brief description of drawings]

FIG. 1 is an end view of a laminated lumber of Example 1.

FIG. 2 is an end view of a laminated lumber of Example 2.

FIG. 3 is an end view of a laminated lumber of Example 3.

FIG. 4 is an end view of a laminated lumber of Example 4.

FIG. 5 is an end view of the laminated wood of Example 5.

FIG. 6 is an end view of a laminated lumber of Example 6.

FIG. 7 is an end view of the laminated wood of Example 6 with through holes formed.

FIG. 8 is a plan view showing the shape of the edge of the narrow lamina of the laminated wood of Example 7.

[Explanation of symbols]

10A to 10F Laminated wood 11A1 to 11A6 Lamina made of spruce 12 to 14 Lamina made of thinned wood of Akita Sugi 21A1 to 21A8 Lamina made of spruce 22 to 24 Lamina made of thinned wood of Akita too 25 Square bar made of Styrofoam 26 Through hole Ba ₁ and Ba ₂ adhesive layer H laminated wood W laminated wood width

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Hideyuki Narita Inventor Hideyuki Narita 21-21 Ginza, Chuo-ku, Tokyo Takenaka Corporation Tokyo Main Store

Claims (5)

[Claims] 1. A first lamina having a width substantially the same as that of the laminated wood and having a predetermined thickness is made from a raw log of an adult tree and has a first thickness.
The second lamina is made from raw timber of undeveloped wood and has a width that is approximately the same as the thickness of the lamina and is narrower than the width of the laminated wood, and by arranging the second lamina, a divided lamina layer of approximately the same width as the laminated wood is formed. The first lamina and the second lamina are superposed such that one or more divided lamina layers are present among the plurality of first lamina constituting the laminated wood, and each lamina is bonded with an adhesive. Laminated wood with a large cross-section characterized by being joined. 2. The first lamina having a width substantially the same as the width of the laminated wood and having a predetermined thickness, is a spruce, sugi, baisei, ezomatsu, dodomamatsu, nienimatsu or fir tree mature tree. A second lamina made of log and having a thickness approximately the same as the thickness of the first lamina and a width narrower than the width of the laminated lumber, made from too thinned timber and lining up two or more second lamina As a result, the laminated lamina layer has a width substantially the same as that of the laminated lumber, and the first lamina layer has one or more divided lamina layers between each of the three or more first lamina constituting the laminated lumber. And a second lamina, and each lamina is joined by an adhesive agent. 3. The first lamina having a width substantially the same as the width of the laminated lumber and having a predetermined thickness, is a spruce, sugi, baisei, ezomatsu, dodomatsu, hennimatsu or fir tree mature tree. A second lamina made from log wood, having a thickness approximately the same as the thickness of the first lamina and a width narrower than the width of the laminated wood, is made from too thinned timber and has a thickness approximately equal to that of the second lamina. A rod body having the same diameter or sides is made of a foamed resin material, and by arranging two or more second lamina, a divided lamina layer having substantially the same width as that of the laminated wood is formed, and two or more second lamina layers are formed. Of the lamina and one or more of the rods are arranged to form a divided lamina rod layer having a width substantially the same as that of the laminated wood, and one layer is provided between each of the three or more first lamina constituting the laminated wood. The above-mentioned divided lamina layer or divided lamina rod body layer exists so that the first lamina, the second lamina and Serial rods are overlapped, glulam large section of each lamina or the like, characterized in that it is joined with an adhesive. 4. A large cross-section according to claim 1, 2 or 3, characterized in that the first lamina is made from mature spruce and the second lamina is made from sliced lumber. Laminated wood. 5. An edge surface of the second lamina facing each other is formed into an uneven surface at right angles to the upper and lower surfaces of the second lamina, and the uneven surface of one lamina and the other lamina facing each other. The laminated material according to claim 1, 2, 3 or 4, wherein the uneven surface of the laminated body can be closely joined.