JP2021050572A - Log wall, jig, log material and manufacturing method of log house - Google Patents

Abstract

To provide a log wall allowing compatibility with settling even when dowels are arranged in one row.SOLUTION: In the log wall, a plurality of log materials having a slit of a predefined diameter penetrating in a vertical direction are laminated in predefined stages with the slits aligned each other, and the dowel is fitted in the slit of at least one log material among the plurality of log materials with a predefined gap from one or both of upper and lower sides.SELECTED DRAWING: Figure 1

Description

The present invention relates to a log wall, a jig, a log material, and a method for manufacturing a log house.

The log wall of a building using the log construction method (hereinafter, also referred to as a log house) is assembled by inserting dowels in a staggered pattern in the log material stacked on the top and bottom. Further, Patent Document 1 discloses a log wall in which dowel holes are arranged in a row.

JP-A-49-43409

Since the dowels disclosed in Patent Document 1 are arranged in close contact with each other, there is a problem that the dowels protrude above and below the log wall at the time of settling. Settling is a phenomenon in which the height of the entire log wall decreases due to the drying shrinkage of the log material that constructs the log wall and the weight of the log material itself. Generally, the settling amount (the amount by which the height of the log wall is lowered by settling; the same applies hereinafter) is 3% of the height of the wall body of the log wall. This settling is generally 70-80% complete in the first 2-3 years and then slowly converges over time.

The present invention has been made to solve these conventional problems, and is to provide a log wall capable of settling even when dowels are arranged in a row.

The present invention is a log wall in which a plurality of log materials having dowel holes having a predetermined diameter penetrating vertically are arranged with each other's dowel holes and laminated in a predetermined number of stages, and at least one of the plurality of log materials is used. The dowel hole of the log material of the book is a log wall in which dowels are fitted with a predetermined gap from both the upper and lower sides or one of them.

Further, the present invention is the log material having a dowel hole of length l _1, the dowel length l ₁ than the length d shorter length l _2, a jig for driving the tip of the dowel end in contact with, for causing l _a projecting dowel from the dowel holes, a jig having an insertion portion having a length of l _a + d.

The present invention also provides a dowel hole of the length l _1, a log material containing the dowel length l ₁ than the length d shorter length l _2.

Further, the present invention includes a plurality of log material dowel holes of the length l _1, and insert the dowels length l ₁ than the length d shorter length l _2, aligning the mutual dowel holes multiple logs material It is not laminated, of the plurality of log material, a dowel inserted in the dowel holes in the log material above, push l _a + d from the log material upper surface of the upper, then the length l _a protruding from dowel holes the dowels This is a method for manufacturing a log house in which a dowel protruding from the upper log material is fitted into a dowel hole of the lower log material among a plurality of log materials.

According to the log wall of the present invention, even when the dowels are arranged in a row, settling can be supported.

Partial front view of the log wall. Partial cross section of the log wall. Partial cross-sectional view of the log wall including the top log material. Partial cross-sectional view of the log wall including the log material at the bottom. Partial cross-sectional view of the log wall when three log materials are penetrated by one dowel. Sectional drawing explaining assembly of base, adjustment material and log material. A cross-sectional view showing a log material in a state of being carried into a construction site. The cross-sectional view explaining the technique of driving a dowel into a dowel hole using a jig.

FIG. 1 is a partial front view of the log wall of the embodiment. The log wall 1 is formed by laminating log materials 101 to 115. The number of laminated log materials (number of stages) is not limited to this. The log wall 1 may have an opening 2 in which a window or the like is arranged. An upper member 4 is provided on the uppermost part of the log material 101. A lower member such as an adjusting material 6 and a base 5 is provided below the log material 115 at the lowermost part. The log materials 101 to 115, the adjusting material 6, and the base 5 are fixed by through bolts 3 provided so as to penetrate vertically. The upper and lower members of the log materials 101 to 115, the adjusting material 6, and the base 5 are fixed to each other by the dowel group 200 (dowels 201 to 215). In FIG. 1, the through bolt 3 and the dowel group 200 are shown by solid lines for explanation, but they are actually arranged inside a log material or the like.

FIG. 2 is a partial cross-sectional view of the log wall. Here, the portion where the log material 102 and the log material 103 are laminated will be described as a representative, but the same applies to other log materials. The log material 102 has a dowel hole 102a that penetrates vertically. The log material 103 has a dowel hole 103a that penetrates vertically. The log material 102 and the log material 103 are laminated with the dowel holes 102a and the dowel holes 103a aligned.

A dowel 201 is fitted in the upper part of the dowel hole 102a. A dowel 202 is fitted in the lower portion of the dowel hole 102a. There is a gap 102b (length d) between the lower end of the dowel 201 and the upper end of the dowel 202. A dowel 202 is fitted in the upper part of the dowel hole 103a. A dowel 203 is fitted in the lower portion of the dowel hole 103a. There is a gap 103b (length d) between the lower end of the dowel 202 and the upper end of the dowel 203. For other log materials, there is a gap (length d) between the lower end and the upper end of the upper and lower dowels in the dowel hole.

_{Here, let l 1} be the penetration length of each of the dowel holes 102a to 115a (not shown). The penetration length of the dowel hole 101a of the log material 101 without the fruit (A in FIG. 2) is l ₁ -h (h is the height of the fruit of the log material. The same applies hereinafter). _{Let l 2 be} the length of each of the dowels 202 to 214. Let the length of the dowel 201 be l ₂ -h. The relationship between l ₁ and l _{2 is l 1} -d = l ₂ . Further, the length of the dowel 201 to 214 protrudes from each log material 101-114 and _{l a.}

Assuming that the assumed settling amount of the log wall 1 is S and the number of stages of the log material provided with the gap is n (here, n = 15), the length d of the gap is the number of stages n in which the settling amount S is provided. Here, it is preferable that the number is equal to or greater than the number divided by (15) (that is, d ≧ S / n) and the settling amount is S or less.

The length d of the gap is preferably constant, but it may be changed depending on the log material in relation to other configurations of the log house or from other design viewpoints. ..

As a result, even if the total height of the log wall 1 is shortened due to settling of the log wall 1, the gaps 101b to 115b in each log material absorb the shortened total height, so that the dowels protrude above and below the log wall. Can be prevented.

FIG. 3 is a partial cross-sectional view of a log wall including the uppermost log material.

The log material 101 has a dowel hole 101a penetrating vertically. The log material 101 has no fruit (A in FIG. 3, height h). The log material 102 has a dowel hole 102a that penetrates vertically. The log material 101 and the log material 102 are laminated by aligning the dowel holes 101a and the dowel holes 102a.

A dowel 201 is fitted in the lower portion of the dowel hole 101a. The total length of the dowel 201 is l _2- h. Top from the upper end of the dowel 201 has a gap of the gap 101b (the length _{l a} + d). By setting the total length of the dowel 201 to l _2- h, it is possible to drive the dowel even in the uppermost log material by using the jig 300 described later.

FIG. 4 is a partial cross-sectional view of the log wall including the log material at the bottom.

The log material 114 has a dowel hole 114a penetrating vertically. The log material 115 has a dowel hole 115a that penetrates vertically. The adjusting material 6 has a hole 6a. The base 5 has a hole 5a. The log material 114, the log material 115, the adjusting material 6, and the base 5 are laminated by aligning the dowel hole 114a, the dowel hole 115a, the hole 6a, and the hole 5a.

A dowel 214 is fitted in the upper part of the dowel hole 115a. A dowel 215 fits in the lower part of the dowel hole 115a. The distance between the lower part of the dowel 214 and the upper part of the dowel 215 is d. The total length of the dowel 215 l ₁ - a _{(l a + d) + c} ( where, c is one in which the sum of the length of the hole 5a and the hole 6a). The total length of the dowel 215 l ₁ - With _{(l a + d) + c} , also in the bottom of the log material, it is possible to drive the dowel using a jig 300 to be described later.

Instead of providing gaps 101b to 115b in the dowel holes 101a to 115a of all log materials 101 to 115, gaps may be provided in one or more log materials.

FIG. 5 shows a gap in the dowel holes of seven log materials (for example, log materials 103, 105, 107, 109, 111, 113, 115) when three continuous log materials are penetrated by one dowel. It is a partial cross-sectional view of the log wall when is provided.

Here, a case where three continuous log materials are penetrated by one dowel will be described as an example, but the number of log materials to be provided with a gap and the length of the dowels are not limited to this.

As shown in FIG. 5, the log materials 101, 102, and 103 are penetrated by one dowel 221 to provide a gap in the dowel holes of the log material 103. The log materials 103, 104, and 105 are penetrated by one dowel 222 to provide a gap in the dowel holes of the log material 105 (not shown). The log materials 105, 106, and 107 are passed through by one dowel 223 to provide a gap in the dowel holes of the log material 107 (not shown).

The log materials 107, 108, and 109 are penetrated by one dowel 224 to provide a gap in the dowel holes of the log material 109 (not shown). The log materials 109, 110, and 111 are passed through by one dowel 225 to provide a gap in the dowel holes of the log material 111 (not shown). The log materials 111, 112, and 113 are passed through by one dowel 226 to provide a gap in the dowel holes of the log material 113 (not shown). The log materials 113, 114, and 115 are penetrated by one dowel 227 to provide a gap in the dowel holes of the log material 115 (not shown).

In FIG. 5, a portion in which the log materials 101, 102, and 103 are penetrated by one dowel 221 to provide a gap in the dowel holes of the log material 103 will be described, but the other log materials 105, 107, 109, 111 will be described. , 113, 115 are the same.

The log material 101 has a dowel hole 101a penetrating vertically. The log material 102 has a dowel hole 102a that penetrates vertically. The log material 103 has a dowel hole 103a that penetrates vertically. The log material 101, the log material 102, and the log material 103 are laminated by aligning the dowel hole 101a, the dowel hole 102a, and the dowel hole 103a.

The dowel holes 101a dowels 221 are fitted from the log material upper end to a depth position of _{l a} + d. The dowel 221 penetrates and fits into the entire dowel hole 102a. A dowel 221 is fitted in the upper part of the dowel hole 103a at _{a depth of la.} A dowel 222 is fitted in the lower portion of the dowel hole 103a. The length of the dowels 222 to 227 is the length _{l 3 which} is shorter than the length _{l 1} × 2 of two stages of the log material, and the length of the dowel 221 penetrating the log materials 101, 102, 103 is actually Subtract the length h of to give l ₃ -h. That is, when the number of stages of the log material to be penetrated by one dowel is x, the length of the dowel is l ₁ × (x-1) -d, and for the uppermost stage, the actual height is subtracted. l ₁ × (x-1) -d-h.

There is a gap 103b (length d) between the lower end of the dowel 221 and the upper end of the dowel 222. Regarding the other log materials 105, 107, 109, 111, 113, 115, there are gaps 105b, 107b, 109b, 111b, 113b, 115b (length d) between the lower ends and the upper ends of the upper and lower dowels in the dowel holes. Yes (both not shown).

Here, let S be the assumed settling amount of the log wall 1, and let n be the number of log materials provided with gaps (n is a natural number equal to or less than the number of stages of the log material. Here, n = 7). The gap length d is preferably equal to or greater than the number obtained by dividing the settling amount S by the number n of log materials provided with the gap (that is, d ≧ S / n) and not more than the settling amount S. For example, when gaps are provided in seven log materials, the length d of the gaps is 15/7 times or more as compared with the case where gaps are provided in all 15 log materials.

When n is 1, since the gaps are concentrated in a specific log material, n is preferably 2 or more, n is more preferably 3 or more, and n is 4 or more or 5 or more. It is more preferable to set it to 6 or more. Most preferably, n is the same as the number of stages of the log material. Furthermore, the shear force of the dowel can be evenly distributed to the _{log material by making the length la a} protruding from the lower log material and the length embedded in the upper log material equal (l ₂ = l _a + l _a). preferable.

In this way, when the number of log materials provided with intervals between the dowels is changed, the length d changes according to the number of log materials (n) provided with gaps. Therefore, the length d is equal to or greater than the value obtained by dividing the settling amount of the log wall in which the log materials are laminated by a predetermined number of stages by the number of stages of the log material (when gaps are provided in all the log materials) and equal to or less than the settling amount (one log). (When a gap is provided in the material). Further, the length d is not constant and may be changed depending on the log material.

When the number n of log materials provided with gaps is generally considered to be, for example, 1 (minimum value) to 15 (maximum value) lines, the gap d sets the settling amount S of the log wall as the log material. It is possible to take a value in the range of the value divided by the number of stages 15 (when the maximum value n = 15) and the settling amount S or less (when the minimum value n = 1).

Then, the log wall having the above-described configuration is arranged around the log house to form a log house.

Next, the construction method (manufacturing method) of the log house of the embodiment will be described. Here, a manufacturing method will be described in which a gap (the length d of the gap is equal to or greater than the number obtained by dividing the settling amount S of the log wall by the number of stages 15) is provided in all 15 log materials.

First, the dowel 215 is fitted into the dowel hole of the base 5 (FIG. 6 (a)). Next, the dowel 215 fitted in the base 5 is fitted into the dowel hole of the adjusting material 6, and the adjusting material 6 is placed on the base 5 (FIG. 6B). Next, the dowel 215 fitted in the base 5 is fitted into the dowel hole 115a of the log material 115, and the log material 115 is placed on the adjusting material 6 (FIG. 6 (c)).

Conventionally, since the base 5, the adjusting material 6, and the log material 115 are first overlapped and then the dowel 215 is struck, it is difficult to adjust the dowel hole positions of these three materials. In the embodiment, since the dowel 215 is transferred to the base 5 first, the adjusting material 6 and the log material 115 are easy to assemble because the dowel hole 6a and the dowel hole 115a are simply inserted into the dowel 215.

Next, the log material 114 is placed on the log material 115.

FIG. 7 is a cross-sectional view showing the log material 114 in a state of being carried into the construction site. The log materials 101 to 113 also have the same carry-in form.

As shown in the figure, a dowel 214 (length l ₂ ) is preliminarily housed in the dowel hole 114 a (length l _{1) of the log material 114.} By adopting such a carry-in form, it is possible to reduce the work of driving dowels at the site.

The length d is equal to or greater than the value obtained by dividing the settling amount of the log wall in which the log materials are laminated by a predetermined number of stages by the number of stages of the log material (when a gap is provided in each log material) and equal to or less than the settling amount (gap in one log material). If is provided). That is, the length d changes according to the number (n) of log materials provided with the gap.

Next, the dowel 214 of the log material 114 is driven into the dowel hole 115a of the log material 115. A jig 300 is used for driving the dowel.

FIG. 8 is a cross-sectional view illustrating a method of driving the dowel 214 into the dowel hole 115a using the jig 300. The log materials 101 to 113 also have the same driving method.

As shown in the figure, the jig 300 has a grip portion 301 that is grasped by an operator or is a hammer striking portion, a stopper portion 302 that has a shape larger than the dowel hole, and an insertion portion 303 that is inserted into the dowel hole. .. Length of the insertion portion 303, an amount (a l _a) the length plus the length d of the gap projecting the dowel from the log material (i.e., l _a + d) is.

The length d is equal to or greater than the value obtained by dividing the settling amount of the log wall in which the log materials are laminated by a predetermined number of stages by the number of stages of the log material (when a gap is provided in each log material) and equal to or less than the settling amount (gap in one log material). If is provided). That is, the length d changes according to the number (n) of log materials provided with the gap.

As shown in FIG. 7, the tip of the insertion portion 303 is brought into contact with the upper end of the dowel 214 housed in the dowel hole 114a, and the grip portion 301 is driven with a hammer. The insertion portion 303 is inserted into the dowel hole 114a, the stopper portion 302 abuts on the upper end of the log material 114, and the driving of the log material 115 of the dowel 214 into the dowel hole 115a is completed.

Since the length of the insertion portion 303 of the jig 300 is _{l a} + d, dowel 214 projects by a length _{1 a} from the lower end of the log material 114 can be fitted in a length of la in dowel holes 115a. In this way, by using the jig 300, the length of the gaps 102b to 115b can be set to a constant value d.

The log wall 1 is completed by repeating the subsequent work on the log materials 101 to 113. Then, the log house is completed by arranging this log wall around it.

As described above, according to the method for manufacturing the log wall and the log house of the embodiment, since there is a gap portion where the dowel does not exist, the settling of the log wall can be absorbed by this gap. Furthermore, by arranging the dowels in a row, space can be saved, the degree of freedom in layout is increased, and larger diameter dowels can be used, which improves the resistance of the log wall.

Although the embodiment has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. This novel embodiment can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1: Log wall, 101-115: Log material, 201-215: Dowel, 300: Jig

Claims (13)

A plurality of log materials having dowel holes penetrating vertically are log walls in which dowel holes are aligned with each other and laminated in a predetermined number of stages.
A log wall in which dowels from both the upper and lower sides or one of the dowel holes of at least one of the plurality of log materials are fitted with a predetermined gap in the dowel holes. The log wall according to claim 1, wherein the length of the predetermined gap is equal to or greater than a value obtained by dividing the settling amount of the log wall by the predetermined number of stages. The log wall according to claim 1 or 2, wherein the length of the predetermined gap is equal to or less than the settling amount. The dowel holes of the log materials of the plurality of log materials have the gaps.
The log wall according to claim 1, wherein the length of the gap between the log materials is equal to or greater than a value obtained by dividing the settling amount of the log wall by the predetermined number of stages. A log house having the log wall according to any one of claims 1 to 4. A jig for driving a dowel having a length d shorter than the length _{l 1} into a log material having a dowel hole having a length l _{1 and having a length l 2.}
Tip in contact with one end of the dowel, in order to l _a projecting said dowel from the dowel holes, a jig having an insertion portion, having a length of l _a + d. The jig according to claim 6, wherein the length d is equal to or greater than a value obtained by dividing the settling amount of the log wall in which the log material is laminated by a predetermined number of stages by the predetermined number of stages. The jig according to claim 6 or 7, wherein the length d is equal to or less than the settling amount. The dowel holes of the length l _1, containing the length d of the short length l ₂ dowels than the length l _1, the log material. The log material according to claim 9, wherein the length d is equal to or more than a value obtained by dividing the settling amount of the log wall in which the log material is laminated by a predetermined number of stages by the predetermined number of stages and is equal to or less than the settling amount. Insert dowels of _{length l 2} shorter than length _{l 1} into dowel holes of length l _{1 of multiple log materials.}
The plurality of log materials are laminated by aligning the dowel holes with each other.
Wherein among the plurality of log material, a dowel inserted in the dowel holes in the log material above, push l _a + d from the log material upper surface on the, the dowel is a length l _a protruding from the dowel holes,
A method for manufacturing a log house, in which a dowel protruding from the upper log material is fitted into a dowel hole of the lower log material among the plurality of log materials. The method for manufacturing a log house according to claim 11, wherein the length d is equal to or more than a value obtained by dividing the settling amount of the log wall in which the log materials are laminated by a predetermined number of stages by the predetermined number of stages and is equal to or less than the settling amount. .. Insert the dowel into the dowel hole of the base and
The dowel fitted in the base is fitted into the dowel hole of the adjusting material, and the adjusting material is placed on the base.
The method for manufacturing a log house according to claim 11 or 12, wherein the dowel fitted in the base is fitted into the dowel hole of the log material, and the log material is placed on the adjusting material.

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