JP7085318B2 - Laminated wood and manufacturing method of laminated wood - Google Patents

Description

The present invention relates to a rod-shaped laminated wood and a method for producing the laminated wood.

Patent Document 1 discloses a handrail for stairs formed by appropriately combining a plurality of laminated blocks (glulam in the shape of a square bar). Each laminated block is formed by laminating a plurality of plate-shaped bodies having a rectangular cross section. Each plate-shaped body is a long material formed by joining the ends of a plurality of short materials each having a rectangular cross section.

The joint portion between the short members in the plate-shaped body has lower strength than the non-joined portion in the plate-shaped body. Therefore, at the time of forming the laminated block, the plurality of plate-like bodies are laminated so that the position of the joint portion in one plate-like body deviates from the position of the joint portion in the other plate-like body in the longitudinal direction. Then, since the joined portion in one plate-shaped body is reinforced by the non-joined portion in the other plate-shaped body, the strength of the laminated block can be improved.

Japanese Patent Application Laid-Open No. 2003-293542

However, when lamina is used as the short material, for example, the length of the short material is not always uniform, so that the distance between the joints in one plate and the distance between the joints in another plate are often different. And different from each other. Therefore, even if the first joint portion in one plate-like body is separated from the first joint portion in another plate-like body by an appropriate length, the second joint portion in one plate-like body is the other plate. There is a risk that it will be adjacent to or close to the second joint in the shape. Then, there arises a problem that the strength of the second joint portion in the laminated block is lowered.

The present invention has been made in view of such circumstances, and a main object thereof is to provide laminated wood and a method for producing laminated wood capable of improving the strength.

The laminated material according to the present embodiment is a rod-shaped laminated material in which the flat surfaces of a plurality of long rods each having a flat surface extending in the longitudinal direction are joined to each other, and each long rod is a rod-shaped aggregate. It is formed by joining the end portions of three or more short bars having non-uniform lengths in the longitudinal direction, and the position of the joint portion between the short bars in one long bar is , The position of the joint portion in the other long bar is deviated from the position of the joint portion in the longitudinal direction, and the position of the joint portion in the one long bar is the position of the joint portion in the other long bar. Among them, the amount of deviation to the position of the joint portion closest to the joint portion in the one long bar is uniform, and the four long bars are provided, and the joint portion in each long bar is provided. Is longitudinally offset from the position of the joint in at least two other long bars, each of the two long bars having two flat surfaces parallel to each other. The flat surfaces of one of the two long bars are joined so that the positions of the joint portions of the two long bars in each of the two long bars coincide with each other in the longitudinal direction. It is characterized in that the flat surface of the remaining two long bars is joined to the flat surface of the other of the long bars of the book .

In the method for manufacturing a rod-shaped laminated material according to the present embodiment, a long square bar is formed by joining the ends of three or more short square bars in the longitudinal direction to each other. Then, by dividing the formed long square bar along the longitudinal direction, a plurality of divided bodies are formed, and the position of the joint portion between the short square bars in one divided body is divided into another. It is characterized in that the short square bar is formed by appropriately shifting the joint portion from the position of the joint portion in the body in the longitudinal direction, joining the side surfaces of the plurality of divided bodies, and joining the side surfaces of the plurality of square members. And.

In the method for producing laminated wood according to the present embodiment, three or more split bodies are formed, and the position of the joint portion in each split body is longitudinally elongated from the position of the joint portion in at least two other split bodies. It is characterized by shifting in the direction.

In the present embodiment, the position of the joint portion between the short rods in one long rod is deviated from the position of the joint portion in the other long rod in the longitudinal direction. Therefore, the joint portion in one of the one long bar and the other long bar is reinforced by the non-joint portion of the one long bar and the other long bar. Therefore, the strength of the laminated wood can be improved.

In the laminated wood according to the present embodiment, from the position of the joint portion in one long rod, the joint portion closest to the joint portion in one long rod among the joint portions in the other long rods. The amount of deviation to the position of is uniform (all are equal).

In order to manufacture such a laminated wood, for example, in the method for manufacturing a laminated wood according to the present embodiment, a length formed by joining the ends of three or more short square bars in the longitudinal direction to each other. A bar is used. By dividing the long square bar along the longitudinal direction, a plurality of divided bodies are formed. Glulam is formed by joining the sides of a plurality of split pieces together. Each split body corresponds to one or more long bars constituting the laminated wood.

The distance between the joints in one partition and the distance between the joints in the other parts are equal to each other. Therefore, if the position of the joint portion between the short square bars in one split body is appropriately lengthened in the longitudinal direction from the position of the joint portion in the other split body, the position of the short square bar constituting the long square bar in the longitudinal direction Even if the length is non-uniform, there is no possibility that the joint portion in one divided body is adjacent to or placed close to the joint portion in the other divided body. Further, the amount of deviation from the position of the joint portion in one divided body to the position of the joint portion closest to the joint portion in one divided body among the joint portions in the other divided bodies becomes uniform.

In the present embodiment, the position of the joint portion in each of the three or more long bars is the other length of at least two of the three or more long bars. It is displaced in the longitudinal direction from the position of the joint in the bar. Therefore, the joined portion in each long bar is reinforced by the non-joined portion in at least two other long bars. Therefore, the strength of the laminated wood can be further improved.

In order to manufacture such laminated wood, for example, in the method for manufacturing laminated wood according to the present embodiment, three or more divided bodies are formed. If the position of the joint portion in each of the three or more divided bodies is shifted in the longitudinal direction from the position of the joint portion in at least two other divided bodies in the three or more divided bodies, each division is performed. There is no risk that the joints in the body will be adjacent to or close to the joints in at least two other splits.

In the present embodiment, the joint portions of the two long rods out of the four long rods are adjacent to each other. However, the position of the joint portion of the two long bars is displaced in the longitudinal direction from the position of the joint portion of each of the remaining two long bars, and the two long bars remain. It is sandwiched between two long bars. Therefore, it is possible to prevent the low strength of the joint portions adjacent to each other from adversely affecting the strength of the laminated wood.

In the present embodiment, since the short square bar is formed by using a plurality of square bars, for example, a lamina having a smaller cross-sectional area than the cross-sectional area of the short square bar is effective as the square bar constituting the short square bar. It can be used.

When the laminated wood and the method for producing the laminated wood of the present embodiment are used, the strength of the laminated wood can be improved.

It is a perspective view which shows the laminated wood which concerns on embodiment. It is an exploded perspective view which shows the laminated wood. It is a top view which shows the laminated wood. It is a perspective view which shows the square lumber and the short square bar for demonstrating the manufacturing method of the laminated lumber which concerns on embodiment. It is a side view for demonstrating the formation of a long square bar using a short square bar. It is a top view for demonstrating the formation of the long square bar using the short square bar. It is a top view for demonstrating division of a long square bar. It is a top view for demonstrating the formation of the rod body using a divided body. It is a top view for demonstrating the formation of laminated wood using a rod body. It is a perspective view for demonstrating the formation of laminated wood using a rod body.

Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments thereof.

FIG. 1 is a perspective view showing laminated wood according to an embodiment.
FIG. 2 is an exploded perspective view showing laminated wood.
FIG. 3 is a plan view showing laminated wood.
In the figure, 1 is a round bar-shaped laminated wood, and the laminated wood 1 includes four long bars 11, 12, 13, and 14. The long bars 11 and 14 have the same shape as each other, and the long bars 12 and 13 have the same shape as each other.

The long bar 11 has a bow-shaped cross section. A part of the peripheral surface of the long bar 11 is a flat surface 11a, and the flat surface 11a has a rectangular shape extending in the longitudinal direction of the long bar 11. The remaining portion of the peripheral surface of the long bar 11 is a curved surface 11b.

The long bar 12 has an isosceles trapezoidal cross section in which two legs form an arc. A part of the peripheral surface of the long bar 12 is a flat surface 12a, 12b, and each of the flat surfaces 12a, 12b has a rectangular shape extending in the longitudinal direction of the long bar 12. The flat surfaces 12a and 12b are parallel to each other. The width of the flat surface 12a (the length in the vertical direction in FIG. 2) is shorter than the width of the flat surface 12b. The flat surface 12a and the flat surface 11a of the long bar 11 are congruent and face each other. The rest of the peripheral surface of the long bar 12 is curved surfaces 12c and 12d.
Similarly, the long bar 13 has an isobaric cross section in which two legs form an arc shape, and a part of the peripheral surface of the long bar 13 is a flat surface 13a, 13b. The flat surface 13b and the flat surface 12b of the long bar 12 are congruent and face each other. The remaining portion of the peripheral surface of the long bar 13 is curved surfaces 13c and 13d.

Like the long bar 11, the long bar 14 has a bow-shaped cross section, and a part of the peripheral surface of the long bar 14 is a flat surface 14a. The flat surface 14a and the flat surface 13a of the long bar 13 are congruent and face each other. The remaining portion of the peripheral surface of the long bar 14 is a curved surface 14b.

In the long bars 11, 12, 13 and 14, the flat surfaces 11a and 12a of the long bars 11 and 12 are joined to each other, and the flat surfaces 12b and 13b of the long bars 12 and 13 are joined to each other. The flat surfaces 13a and 14a of the bar members 13 and 14 are joined to each other. The long bars 11, 12, 13, and 14 are joined by using, for example, an adhesive. A curved surface 11b, a curved surface 12c, a curved surface 13d, a curved surface 14b, a curved surface 13c, and a curved surface 12d are arranged in this order on the peripheral surface of the laminated wood 1.

The long bar 11 is formed by joining the ends of three or more short bars 111, 111, ... In the longitudinal direction. Adjacent short bars 111, 111 are joined to each other by a finger joint. Therefore, the long bar 11 has joint portions 112, 112, ... Between the short bars 111, 111, ....
Short bars 111, 111, ... The lengths of each in the longitudinal direction are non-uniform. Therefore, the distance between the joint portions 112, 112, ... In the long bar 11 is not uniform.
Similarly, the long bar 14 is formed by joining three or more short bars 141, 141, ..., And the joint portions 142, 142, ... Of the short bars 141, 141, ... Has. The spacing between the joint portions 142, 142, ... In the long bar material 14 is non-uniform.

The long bar 12 is formed by joining the ends of three or more short bars 121, 121, ... In the longitudinal direction. Therefore, the long bar 12 has joint portions 122, 122, ... Between the short bars 121, 121, .... Adjacent short bars 121 and 121 are joined to each other by finger joints.
The lengths of the short bars 121, 121, ... Each in the longitudinal direction are non-uniform. Therefore, the distance between the joint portions 122, 122, ... In the long bar 12 is not uniform.
Similarly, the long bar 13 is formed by joining three or more short bars 131, 131, ..., And the joint portions 132, 132, ... Of the short bars 131, 131, ... Has. The spacing between the joint portions 132, 132, ... In the long bar 13 is not uniform.

The positions of the joint portions 122, 122, ... In the long bar 12 in the longitudinal direction and the positions of the joint portions 132, 132, ... In the long bar 13 in the longitudinal direction coincide with each other.

On the other hand, the positions of the joint portions 122, 122, ... In the long bar 12 are deviated from the positions of the joint portions 112, 112, ... In the long bar 11 in the longitudinal direction. Further, the positions of the joint portions 132, 132, ... In the long bar 13 are deviated from the positions of the joint portions 142, 142, ... In the long bar 14 in the longitudinal direction.

From the positions of the joint portions 122, 122, ... In the long bar material 12, the joints closest to the joint portions 122, 122, ... The amount of deviation to the positions of the portions 112, 112, ... Is uniform with the amount of deviation a (a is a real number of a> 0) shown in FIG. Further, from the positions of the joint portions 132, 132, ... In the long bar material 13, among the joint portions 142, 142, ... In the long bar material 14, the joint portions 132, 132, ... In the long bar material 13 are the most. The amount of deviation to the positions of the close joint portions 142, 142, ... Is uniform with the amount of deviation b (b is a real number of b> 0). The deviation amounts a and b may be either a = b or a ≠ b.

The positions of the joint portions 112, 112, ... In the long bar 11 are deviated from the positions of the joint portions 142, 142, ... In the long bar 14 in the longitudinal direction.
From the position of the joint portions 112, 112, ... In the long bar material 11, the joint closest to the joint portions 112, 112, ... In the long bar material 11 among the joint portions 142, 142, ... In the long bar material 14. The amount of deviation to the positions of the portions 142, 142, ... Is uniform with the amount of deviation {a + b}.

That is, the positions of the joint portions 112, 112, ... In the long bar 11 are displaced in the longitudinal direction from the positions of the joints in each of the three other long bars 12, 13, 14 and the long bars. The positions of the joint portions 142, 142, ... In the material 14 are displaced in the longitudinal direction from the positions of the joint portions in each of the three other long rods 11, 12, 13. Further, the positions of the joint portions in the joint portions 122, 122, ... (And the joint portions 132, 132, ... In the long bar 13) are the positions of the two other long bars 11, 14 It is displaced in the longitudinal direction from the position of the joint in each case. Then, from the position of the joint portion in one of the long bars 11,12,14 (or the long bars 11,13,14), the long bars 11,12,14 (or) The amount of deviation to the position of the joint portion closest to the joint portion in one long bar member among the joint portions in the other long bar members 11, 13, 14) is uniform. ..

In the case of the laminated wood 1 as described above, the joint portions 112, 112, ... In the long bar 11 are reinforced by the non-joined portions in the long bars 12, 13, 14 respectively, and the joints in the long bar 14 are joined. The portions 142, 142, ... Are reinforced by the non-joined portions of the long bars 11, 12, 13 respectively. Further, the long rods 12 and 13 are sandwiched between the long rods 11 and 14, and also the joint portions 122, 122, ... And the joint portions 132, 132 in the long rods 12 and 13. ... is reinforced by the non-joint portions of the long bars 11 and 14, respectively.
Therefore, the strength of the laminated wood 1 can be improved.
Glulam 1 is used, for example, as a bar constituting a handrail of a staircase, a pillar of a handrail, a baluster, a fence, a lattice, or the like.

FIG. 4 is a perspective view showing a square lumber and a short square bar for explaining the manufacturing method of the laminated lumber 1 according to the embodiment.
21 and 22 in the figure are square lumbers, and 23 in the figure is a short square bar.
The manufacturer prepares two square timbers 21 and 22. In the present embodiment, the length of each of the square timbers 21 and 22 in the longitudinal direction and the length and width of the cross section are the same as each other.
The square lumbers 21 and 22 are each made of wood. Here, the wood is a solid wood or a wood material. For example, lamina may be used as the square lumbers 21 and 22.

The manufacturer forms the short square bar 23 by joining the side surfaces of the square timbers 21 and 22 to each other. In the present embodiment, the cross-sectional shape of each of the square timbers 21 and 22 is rectangular, and the cross-sectional shape of the short square bar 23 is square.

The cross-sectional shape of each of the square timbers 21 and 22 may be square, and the cross-sectional shape of the short square bar 23 may be rectangular.
Further, when the lengths of the prepared square timbers 21 and 22 in the longitudinal direction or the vertical and horizontal lengths of the cross sections are different from each other, the manufacturer forms one bar by joining the side surfaces of the square timbers 21 and 22 to each other. Then, the short square bar 23 may be formed by appropriately processing the formed bar material (for example, cutting the end portion or cutting the side surface).

The manufacturer forms three or more short square bars 23, 23, .... The lengths of the short square bars 23, 23, ... Each in the longitudinal direction are non-uniform.

FIG. 5 is a side view for explaining the formation of a long square bar using the short square bars 23, 23, ....
FIG. 6 is a plan view for explaining the formation of a long square bar using the short square bars 23, 23, ....
In the figure, 24 is a long square bar. The manufacturer forms the long square bar 24 by joining the ends of the short square bars 23, 23, ... In the longitudinal direction. The formed long square bar 24 has short square bars 23, 23, ... Joined portions 241,241 ,. Adjacent short square bars 23, 23 are joined to each other by finger joints.
In the present embodiment, the short square bars 23, 23, ... Are joined so that the joint surfaces of the square timbers 21 and 22 in each short square bar 23 are flush with each other. As a result, the boundary line between the square lumbers 21, 21, ... And the square lumbers 22, 22, ... Appearing on the side surface of the long square bar 24 becomes a straight line.

FIG. 7 is a plan view for explaining the division of the long square bar 24.
The manufacturer cuts the long square bar 24 along the longitudinal direction of the long square bar 24 and divides it into three parts. In FIG. 7, the cutting position of the long square bar 24 is shown by a thick line.
In the present embodiment, the cut surface of the long square bar 24 is parallel to the joint surface of the square timbers 21 and 22, and the long square bar 24 is divided into three equal parts in the vertical direction in FIG.

The manufacturer forms three divided bodies 251,252,253 having a uniform length in the longitudinal direction by dividing the long square bar 24 into three parts.
The divided bodies 251, 252, and 253 are square bars, respectively. Further, what is the distance between the joint portions 241,241, ... In the split body 251 and the distance between the joint portions 241,241, ... In the split body 252, and the distance between the joint portions 241,241, ... In the split body 253. Equal to each other.
The split body 251 contains a part of each of the square lumbers 21, 21, ..., And the split body 253 contains a part of each of the square lumbers 22, 22, .... On the other hand, the divided body 252 includes the remaining portions of the square lumbers 21 and 21, ... and the remaining portions of the square lumbers 22, 22, ....

FIG. 8 is a plan view for explaining the formation of a rod body using the divided bodies 251, 252, 253.
In the figure, 26 is a rod body, and the rod body 26 has a square bar shape in which both end faces have steps.
After the formation of the divided bodies 251,252,253, the manufacturer shifts the positions of the joint portions 241,241, ... In the divided body 251 in the longitudinal direction from the positions of the joined portions 241,241, ... In the divided body 252 a. The positions of the joint portions 241,241, ... In the split body 253 are shifted by the amount b in the longitudinal direction from the positions of the joint portions 241,241, ... In the split body 252. The direction in which the divided body 251 is displaced and the direction in which the divided body 253 is displaced are opposite to each other. As a result of the above, the rod body 26 is formed.

Here, the deviation amounts a and b are each less than half the length in the longitudinal direction of the short square bar 23 having the shortest length in the longitudinal direction. Therefore, there is no possibility that the joint portions 241,241, ... In the split body 251 are adjacent to or close to the joint portions 241,241, ... In each of the other split bodies 252,253. Similarly, there is no risk that the joint portions 241,241, ... In the split body 252 will be adjacent to or placed close to the joint portions 241,241, ... In the other split bodies 253.

In the present embodiment, the divided bodies 251 and 253 are shifted in opposite directions relative to the divided body 252, but the present invention is not limited to this, and for example, the divided bodies 252 and 253 are relatively relative to the divided body 251. May be shifted in opposite directions.

FIG. 9 is a plan view for explaining the formation of laminated wood 1 using the rod body 26.
FIG. 10 is a perspective view for explaining the formation of laminated wood 1 using the rod body 26.
In the figure, 27 is a laminated wood, and the laminated wood 27 has a square bar shape. Both end faces of the laminated wood 27 are square flat faces.
The operator forms the laminated wood 27 in the shape of a square bar by cutting both ends of the rod body 26 at appropriate positions.

In the laminated lumber 27, the joint portions 241,241 in each of the divided bodies 251,252,253, ... Each of them is not in the two other divided bodies of the divided bodies 251,252,253. Since it is reinforced by the joint portion, the strength of the laminated lumber 27 can be improved.

Here, it is considered that the strength of the laminated wood 27 is improved as the deviation amounts a and b are larger (that is, the joint portion 241 is separated from the other joint portions 241). However, if the deviation amounts a and b are too large, there arises a problem that the scraps generated by cutting both ends of the rod body 26 shown in FIG. 8 become unnecessarily large. Therefore, it is necessary to appropriately determine the deviation amounts a and b, respectively.

After forming the laminated wood 27, the worker forms the laminated wood 1 shown in FIG. 1 by cutting the four sides of the laminated wood 27. In FIG. 10, the outline of the end face of the laminated wood 1 is shown by a two-dot chain line.

The laminated wood 27 may be used as a final product. Further, the laminated wood 1 having a non-circular cross section (for example, an elliptical cross section) may be formed from the laminated wood 27.
When forming the short square bar 23, three or more square timbers may be joined. Alternatively, one square lumber may be used as the short square bar 23. For example, when three square timbers are used, the side surfaces of the three square timbers may be joined so as to sandwich one square timber in which the two square timbers remain. Alternatively, the side surfaces of the three square timbers may be joined so that the two square timbers are joined as shown in FIG. 4 and the remaining one square timber covers the boundary portion of the two square timbers.

When the long square bar 24 is formed by using the short square bar 23 shown in FIG. 4, the joint surface of the square members 21 and 22 in one short square bar 23 and the joint surface of the square members 21 and 22 in the other short square bar 23. The short square bars 23, 23, ... May be joined so as to be orthogonal to each other.
The long square bar 24 is not limited to the configuration in which it is divided into three equal parts. The long square bar 24 may be divided non-uniformly, may be divided into two, or may be divided into four or more.

The embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is not intended to have the above-mentioned meaning, but is intended to include the meaning equivalent to the scope of claims and all modifications within the scope of claims.

1,27 Laminated lumber 11,12,13,14 Long bar 111,121,131,141 Short bar 112,122,132,142,241 Joint part 11a, 12a, 13a, 13b, 14a Flat surface 21, 22 Square lumber 23 Short square bar 24 Long square bar 251,252,253 Divided body

Claims (3)

In rod-shaped laminated wood,
The flat surfaces of a plurality of long rods each having a flat surface extending in the longitudinal direction are joined to each other.
Each long bar is formed by joining the longitudinal ends of three or more short bars of non-uniform length.
The position of the joint portion between the short rods in one long rod is deviated from the position of the joint portion in the other long rod in the longitudinal direction.
The deviation from the position of the joint portion in the one long bar to the position of the joint portion closest to the joint portion in the one long bar among the joint portions in the other long bar. The amount is uniform ,
Equipped with the four long rods mentioned above,
The position of the joint in each long bar is longitudinally offset from the position of the joint in at least two other long bars.
Each of the two long bars has two flat surfaces parallel to each other.
The flat surfaces of one of the two long bars are joined so that the positions of the joint portions of the two long bars in each of the two long bars coincide with each other in the longitudinal direction.
A laminated wood characterized in that the flat surface of the remaining two long bars is joined to the flat surface of the other of the two long bars . In the method of manufacturing bar-shaped laminated wood,
A long square bar is formed by joining the ends of three or more short square bars in the longitudinal direction to each other.
By dividing the formed long square bar along the longitudinal direction, a plurality of divided bodies are formed.
The position of the joint portion between the short square bars in one split body is shifted appropriately in the longitudinal direction from the position of the joint portion in the other split body.
The sides of the plurality of divided bodies are joined to each other,
A method for producing laminated lumber, which comprises forming the short square bar by joining the side surfaces of a plurality of square lumbers to each other . Form three or more divided bodies,
The method for producing laminated wood according to claim 2 , wherein the position of the joint portion in each divided body is displaced in the longitudinal direction from the position of the joint portion in at least two other divided bodies.

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