JP7169690B2 - wood for log house - Google Patents

Description

Article 30, Paragraph 2 of the Patent Law applies Catalog "Feel-G New standard log house 2018 NEW MODEL", pages 3-4, Phoenix Home Co., Ltd., Phoenix Home First Class Architect Office

The present invention relates to lumber for log houses.

In recent years, laminate materials, in which logs are cut from the center and glued back-to-back, are used as lumber for log houses. Laminated materials have the advantage of being resistant to damage, cracking, and twisting by enclosing the periphery of the wood inside and exposing the core to the outside. is becoming

However, conventional laminate materials are known to undergo shrinkage called settling. Settling is a phenomenon peculiar to log houses, in which the logs on each level shrink due to the weight of the wood and drying shrinkage. When settling occurs, the timber for each level of the log house walls that make up the walls of the log house sinks, and the height of the walls of the log house becomes lower.

FIG. 9 shows the three orthogonal axes of wood. As shown, the direction 51 in which the tree grows is called the fiber (longitudinal) direction, and the direction 53 from the inside to the outside of the annual rings is called the radial (radial) direction, and the fiber direction is also called the radial direction. The direction 52 perpendicular to both is called the tangential direction. It is known that wood shrinks differently in different directions, with a ratio of shrinkage in the tangential direction 51, radial direction 53 and fiber direction 52 of 10:5:0.2-0.3.

FIG. 10 is an end view showing an example of a conventional laminated material. The laminated material shown in the figure has pieces of wood 41, 41, 42, 42 that are joined together so that their fiber directions are aligned. Laminated materials are used horizontally in a log house, and the fiber direction is substantially horizontal in the installed state. They are piled up in the direction 53 and the tangential direction 52 . Therefore, conventional lumber for log houses tends to shrink in the stacking direction, and as a result, settling tends to occur in log houses using conventional lumber for log houses.

Even if the timber for log houses shrinks, doors, windows, stairs, etc. do not change, so it is necessary to leave a space to absorb settling during construction. At the time of maintenance, adjustments are made according to the amount of settling to correct the condition. Residents of log houses must always pay attention to such settling and take appropriate measures, but such maintenance and management is a heavy burden on the residents.

The present invention has been made in view of the above problems, and an object thereof is to provide lumber for log houses that can suppress settling.

A lumber for a log house according to the present invention includes a pair of outer lumbers arranged parallel to each other in one direction, and at least one inner lumber whose fiber direction intersects the fiber direction of the pair of outer lumbers. an inner structure disposed between a pair of outer timbers and joined to the outer timbers, the bottom for stacking the log house timber on top of another log house timber A side fitting portion is provided on one side of the inner lumber in the fiber direction, and an upper fitting portion for stacking another log house lumber on top of the log house lumber is provided on the inner lumber in the fiber direction. provided on the other side.

According to the present invention, since the lumber for log houses is piled up in the fiber direction of the inner lumber, settling is suppressed. In addition, since the inner structure including the inner lumber is arranged between the pair of outer lumbers, and the outer lumber extends horizontally in the installed state, the lumber for the log house does not impair the appearance.

It is a figure which shows the end surface of the lumber for log houses which concerns on 1st Embodiment of this invention. 1 is a front view of a state in which lumber for a log house according to the first embodiment of the present invention is piled up; FIG. 1 is a top view of lumber for a log house according to a first embodiment of the present invention; FIG. FIG. 10 is a diagram showing an end face of lumber for a log house according to a second embodiment of the present invention; FIG. 10 is a top view of lumber for a log house according to a second embodiment of the present invention; FIG. 10 is a diagram showing an end face of lumber for a log house according to a third embodiment of the present invention; FIG. 11 is a perspective view of lumber for a log house according to a fourth embodiment of the present invention; FIG. 11 is a top view of lumber for a log house according to a fifth embodiment of the present invention; The three orthogonal axes of wood are shown. It is a figure which shows the end surface of the lumber for log houses based on a prior art.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In addition, in a plurality of embodiments of the present invention shown below, when the same members and structures are used, the same reference numerals may be given to them and the description thereof may be omitted.

FIG. 1 is a diagram showing an end face of a log house wood (log material) W according to the first embodiment of the present invention. FIG. 2 shows a plurality of log house timbers W (here, for simplification, five layers) stacked vertically. As shown in FIG. 2, a plurality of log house timbers W are piled up to form the inner wall and outer wall of the log house. It should be noted that the notch that is the engaging portion with the orthogonally arranged wall is omitted in the figure. Further, FIG. 3 shows a top view of the log house lumber W. As shown in FIG.

The log house timber W includes a pair of upper outer timbers 1, a pair of lower outer timbers 2, and an inner timber 3. The upper outer timber 1 and the lower outer timber 2 are elongated timbers, which are arranged horizontally in the installed state, and the fiber direction coincides with the extending direction of these timbers. On the other hand, as shown in FIG. 3, a plurality of inner lumbers 3 that are shorter than the upper outer lumber 1 and the lower outer lumber are used as the lumber for the log house. The fiber direction of these inner lumbers 3 intersects with the fiber directions of the upper outer lumber 1 and the lower outer lumber 1, and preferably these directions are perpendicular to each other.

The inner wooden pieces 3 are arranged in the extending direction of the upper outer member 1 and the lower outer member 2, thereby forming the inner structure I according to the embodiment of the present invention. Each inner wooden piece 3 has an upper portion sandwiched between the upper outer members 1 and a lower portion sandwiched between the lower outer members 2 . Here, between the upper outer lumber 1 and the lower outer lumber 2, between the upper outer lumber 1 and the inner lumber 3, between the lower outer lumber 2 and the inner lumber 3, and between the inner lumbers 3 are all bonded, for example. Bonded by a bonding means such as an agent.

As shown in FIG. 2, the upper outer timber 1 and the lower outer timber 2 are cut from a raw material log so as to extend in the fiber direction. In the illustrated log house wood W, two pieces of wood, ie, the upper outside piece of wood 1 and the lower outside piece of wood 2 are arranged side by side in the vertical direction (stacking direction). Or you can place only one plank. The inner lumber 3 is also cut out from a raw material log so as to extend in the fiber direction, but is cut so that its length substantially matches the sum of the heights of the upper outer lumber 1 and the lower outer lumber 2.

A pair of upper outer timbers 1 are arranged symmetrically with respect to the inner timber 3, and likewise a pair of lower outer timbers 2 are arranged symmetrically with respect to the inner timber 3. An upper fitting part Wt for stacking another log house timber W is formed on the upper part of the log house timber W, and a lower part is formed so that the log house timber W is stacked on top of the other log house timber W. A lower fitting portion Wb for stacking is formed. Specifically, the upper fitting portion Wt is formed by providing the upper end of the upper outer wooden piece 1 with a convex portion 1a projecting more than the inner wooden piece 3 . In addition, the lower end of the lower outer wooden piece 2 is provided with a concave portion 2a into which the convex portion 1a of another wooden piece W for a log house is fitted, thereby forming a lower fitting portion Wb. When stacking a plurality of log house timbers W, the lower fitting portion Wb of the upper log house timber W is fitted to the upper fitting portion Wt of the lower log house timber W. As shown in FIG. As a result, the log house timbers W on the upper and lower stages are not displaced in the wall thickness direction. In addition, a sealing member is arranged in the square groove formed in the deep part of the recess 2a, thereby improving airtightness and heat insulation.

When the upper and lower log house timbers W are fitted together, the upper end surface of the inner timber 3 of the lower log house timber W and the lower end surface of the inner timber 3 of the upper log house timber W are in contact with each other. touch. The shrinkage of wood in the fiber direction is significantly less than the shrinkage of wood in the radial and tangential directions. The log house timber W according to this embodiment has an inner timber 3 as an inner structure I, and the fibers of the inner timber 3 are oriented in the stacking direction of the log house timber W. As shown in FIG. As a result, the shrinkage rate of the inner lumber 3 in the stacking direction is remarkably small, so that the settling of the lumber W for the log house is suitably suppressed.

In particular, according to the present embodiment, when the upper and lower log house timbers W are fitted, the upper end surface of the inner timber 3 of the lower log house timber W and the inner timber of the upper log house timber W Since the lower end surface of the timbers 3 abuts against each other, the inner timbers 3 of the timbers Wno for the upper and lower tiers of the log house serve as so-called supports, and settling can be suppressed more effectively. In addition, since the upper outer lumber 1 and the lower outer lumber 2 whose fiber direction is horizontal at the time of installation are arranged on the front side and the back side of the log house lumber W, both the inside and the outside of the wall of the log house are arranged. Also, the wood having fibers in the substantially horizontal direction can be seen, and despite the presence of the inner structure I, the wall member of the log house can have a good appearance.

FIG. 4 shows an end face of the log house lumber W2 according to the second embodiment of the present invention. FIG. 5 is a top view of the log house lumber W2 according to the second embodiment. The log house timber W2 is the same as the log house timber W according to the first embodiment except for the inner structure I2.

The inner structure I2 has three layers of timbers in the wall thickness direction, and horizontally stacked timbers 14, 14 are sandwiched between a pair of inner timbers 3 spaced apart in the wall thickness direction. have a structure. Each piece of wood is joined by a joining means such as an adhesive. The transverse wood 14 is long like the outer wood 1 and extends horizontally in the installed state, and the fibers extend in the drawing direction.

On the other hand, the inner lumber 3 is a short lumber, and the fiber direction is vertical in the installed state. As shown in FIG. 5, the inner wooden pieces 3 are arranged in two rows spaced apart in the wall thickness direction. It is joined by a joining means such as an adhesive.

Also in this embodiment, the log house timbers W2 are stacked vertically, and the upper fitting portion Wt of the lower log house timber W2 and the lower fitting portion Wb of the upper log house timber W2 are fitted. In this state, the upper end surface of the inner wooden piece 3 of each row of the lower log house wooden pieces W2 abuts the lower end surface of the inner wooden piece 3 of the corresponding row of the upper log house wooden pieces W2. The log house wood W2 has a five-layer structure in the wall thickness direction, and can increase strength. In addition, since the inner lumber 3 can be arranged in two rows, settling can be suppressed more effectively. Although the inner structure I2 has three layers in the wall thickness direction here, it may have more layers.

FIG. 6 shows an end face of a state in which the log house lumber W3 according to the third embodiment of the present invention is piled up. As shown in the figure, the log house timber W3 includes a pair of upper outer timbers 21, a pair of lower outer timbers 22, and an inner structure I3.

The upper outer timber 21 and the lower outer timber 22 are elongated timbers, which are arranged horizontally in the installed state, and the fiber direction coincides with the extending direction of these timbers. The inner structure I3 is sandwiched between the upper outer member 1 at its upper portion and sandwiched between the lower outer members 2 at its lower portion. Here, between the upper outer wooden piece 21 and the lower outer wooden piece 22, between the upper outer wooden piece 21 and the inner structure I3, and between the lower outer wooden piece 22 and the inner structure I3 are all bonded, for example, by an adhesive. joined by means.

The inner structure I3 has three layers of lumber in the wall thickness direction, similar to the lumber W2 for the log house. It has a structure sandwiched by the inner wood 23 of the. Each piece of wood is joined by a joining means such as an adhesive. The transverse wood 24 is elongated like the outer wood 21 and extends horizontally in the installed state, and the fibers extend in the drawing direction. On the other hand, the inner lumber 23 is a short lumber, and the fiber direction is vertical in the installed state. As with the wooden pieces W2 for the log house, the inner wooden pieces 23 are arranged in two rows spaced apart in the wall thickness direction, and the inner wooden pieces 23 in each row are arranged along the extending direction of the outer wooden pieces 21 .

The log house timber W3 has a larger ratio of the thickness of the inner timber 23 to the wall thickness than the log house timber W2. Thereby, settling can be suppressed more effectively. In addition, since the thickness of the inner lumber 23 is made relatively large in this way, the upper fitting portion Wt used for fitting with the upper lumber W3 for log house is located at the upper end of the lumber W3 for log house on the outer side. It is formed by providing a convex portion 26 at the boundary portion between the wooden piece 21 and the inner wooden piece 23 . Similarly, the lower fitting portion Wb used for fitting with the lower log house timber W3 is provided with a recess 25 at the boundary between the outer timber 21 and the inner timber 23 at the lower end of the log house timber W3. formed by

In the third embodiment as well, when the upper and lower log house timbers W3 are fitted together, a portion of the upper end surface of the inner timber 23 of the lower log house timber W3 and the inner side of the upper log house timber W3 A portion of the lower end surface of the wood 23 abuts thereon. This effectively suppresses settling.

In the above-described first to third embodiments, an example in which the present invention is applied to a log material having an external shape similar to that of a conventional log material, that is, a rectangular log material has been described. However, the scope of application of the present invention is not limited to lumber for log houses having such an external shape, and the aspect ratio can be changed freely, and for example, it may be formed into a plate shape. FIG. 7 shows a perspective view of a log house lumber W4 according to a fourth embodiment of the present invention. The log house timber W4 has a plate-like outer shape by itself, and has the same height as its width. It has the same configuration as the lumber W for the log house.

Specifically, a plurality of (here, three) intermediate outer wooden pieces 30 are arranged between the upper outer wooden piece 1 and the lower outer wooden piece 2, and the inner wooden piece 3 is elongated accordingly. That is, each inner wooden piece 3 is extended to the length of five steps of the outer wooden piece. As a result, the lumber W4 for a log house having a plate-like outer shape can be realized. By forming the log house timber W4 into a plate shape, the number of log house timbers W4 to be piled up during construction of the log house is reduced, leading to shortening of the construction period.

Here, the inner structure I is composed of the inner wooden pieces 3 arranged in a row in the extending direction of the upper outer wooden piece 1, the lower outer wooden piece 2, and the intermediate outer wooden piece 30. However, similar to the second and third embodiments, Of course, three or more layers may be formed in the wall thickness direction. In addition, such plate-shaped lumber for log houses may be manufactured by processing an existing wooden panel such as CLT (Cross Laminated Timber) in which lumber is laminated so that the fiber directions intersect vertically and horizontally.

FIG. 8 is a top view of a log house lumber W5 according to a fifth embodiment of the present invention. The log house timber W5 shown in the figure differs from the log house timber W according to the first embodiment in that a heat insulating material is arranged in a part of the inner structure I5. Specifically, a heat insulating material is placed at the position of some of the inner wooden pieces 3 . That is, as shown in the figure, the inner wooden pieces 3 are spaced apart, and the heat insulating material 40 is arranged therebetween. As the heat insulating material 40, various materials such as glass wool and flame-retardant resin heat insulating material may be adopted. In this way, the log house timber W5 having excellent heat insulating properties can be obtained. Also in the second to fourth embodiments, a heat insulating material may be arranged in a part of the inner structure.

W, W2, W3, W4, W5 lumber for log house, Wt upper fitting part, Wb lower fitting part, I, I2, I3, I5 inner structure, 1, 21 upper outer lumber, 2, 22 lower outer lumber , 3,23 inner timber, 14,24 lateral timber, 30 intermediate outer timber, 40 insulation.

Claims (5)

a pair of outer timbers arranged parallel to each other in one direction;
an inner structure comprising at least one inner piece of wood whose fiber direction intersects the fiber direction of said pair of outer pieces of wood, and which is positioned between and joined to said pair of outer pieces of wood;
Log house timber having
A lower fitting portion for stacking the log house timber on another log house timber is provided on one side of the inner timber in the fiber direction, and another log house is stacked on the log house timber. An upper fitting portion for stacking on the lumber is provided on the other side of the inner lumber in the fiber direction ,
The pair of outer lumbers includes three or more lumbers arranged in the fiber direction of the inner lumber on one side of the inner structure, and three or more lumbers arranged in the fiber direction of the inner lumber on the other side of the inner structure. and having a single plate-like outer shape,
Wood for log houses. In the lumber for log houses according to claim 1,
said at least one inner piece of wood comprising a plurality of inner pieces of wood;
The lumber for a log house, wherein the plurality of inner lumbers are arranged so as to be aligned in the extending direction of the pair of outer lumbers. In the lumber for log houses according to claim 2,
The lumber for a log house, wherein each of the inner lumbers is spaced apart, and a heat insulating material is arranged between the adjacent inner lumbers. The log house lumber according to any one of claims 1 to 3 ,
The lumber for a log house, wherein the inner structure includes at least one lumber arranged such that its fiber direction intersects with the fiber direction of the at least one inner lumber. The log house lumber according to any one of claims 1 to 4 ,
The lumber for a log house, wherein the inner structure has the inner lumber arranged closer to one of the outer lumbers and the inner lumber arranged closer to the other outer lumber.

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