JP2010265663A - Method for joining and method for dismantling building lumber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of obtaining a sufficient adhesion effect after an adhesive agent is applied and saving time and labor in fabricating wooden plugs necessary for joining insertion grooves together in connection with the method for joining building lumber. <P>SOLUTION: The method for joining the building lumber is intended to interfacially join one lumber 1 and the other lumber 2, and filling the insertion grooves 15 with a resin mortar 16 made by mixing a synthetic adhesive agent with natural or synthetic aggregate and hardening the mixture after inserting connecting reinforcing bars 5 into the insertion grooves 15 formed from the one lumber to the other lumber in the interfacially joined portion. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for joining architectural wood such as columns and beams of a wooden building, and a method for dismantling architectural wood such as joined columns and beams.

  Conventionally, an invention disclosed in Japanese Patent Application Laid-Open No. 2000-45396 has been known as a method for joining building wood such as columns and beams of a wooden building. This uses a steel rod to join a wooden column and beam, a column and column, and a beam and beam. A steel rod is inserted from one insertion part into the other insertion part, and an epoxy is inserted into the insertion part. The resin-based adhesive is filled and joined.

JP 2000-45396 A

  However, the method of joining building wood such as the above-mentioned pillar and beam is that the steel rod from the pillar is inserted into the insertion hole of the beam, and this insertion hole is filled with an epoxy resin adhesive and joined. This adhesive has high cost, high heat generation, and large shrinkage due to curing, causing stress at the bonding interface and low specific gravity, so that there is a problem of entering voids. . Therefore, there is a problem that a gap is formed without the adhesive being sufficiently filled in the insertion hole, and uniform quality cannot be obtained as a joining member.

In addition, when a steel rod is inserted into the insertion groove such as the insertion hole and is filled with an epoxy resin adhesive, a wooden plug along the groove is processed to reduce the volume of the resin in order to reduce curing heat generation. There was a need to do. The processing of this wooden plug required precise processing according to the groove, and required technology and labor.
Furthermore, the wood using the steel bars in the joints in this way has not been effectively reused after the wooden building has been demolished, and has been treated as waste material, resulting in an increase in industrial waste.

  A method for joining architectural wood according to the present invention, a method for disassembling the same, and proposed in order to solve such a problem, and the purpose thereof is to obtain a sufficient adhesive effect after filling with an adhesive. Another object of the present invention is to provide a method for joining architectural wood that can be reused after dismantling the joined wood, and a method for disassembling the same, which saves the trouble of processing the wood plug.

The gist for solving the above-mentioned problems of the method of joining architectural timbers according to the present invention is to jointly join one piece of wood with the other piece of wood and from one piece of wood to the other at the face-joined portion. After inserting the connecting rebar into the insertion groove formed on the wood of the wood, the insertion groove is filled with a resin-based mortar composed of a synthetic adhesive mixed with natural aggregate or synthetic aggregate and cured. It is.
If the insertion groove has an opening that opens on the side of the wood, an adhesive tape is attached to the opening after inserting a connecting rebar into the insertion groove, and then a resin mortar is inserted into the insertion groove. Filling with the adhesive tape until it is filled and cured;
The connecting rebar is a steel rod;
When the wood to be joined is a pillar and a pillar, or a beam and a beam, the fiber sheet is wound around the outer peripheral surfaces of both woods at the joint, and the fiber sheet is impregnated with resin and cured. ;
Is included.

  The gist for solving the above-mentioned problems of the method for disassembling building wood according to the present invention is to achieve the object by disassembling both pieces of wood joined by the method for joining building wood according to the present invention. After cutting the connecting rebar and the hardened resin mortar by inserting a cutter between the joints of the two pieces, separating both woods, the insertion grooves in these woods are hollowed out by a punching means, the connecting rebar and the resin mortar Is to remove.

  According to the method for joining architectural timbers of the present invention, by using resin mortar containing an inexpensive inorganic aggregate as an adhesive, it is possible to reduce costs and to generate heat, cure shrinkage, and a coefficient of thermal expansion. This reduces the stress at the bonding interface such as connecting reinforcing bars and wood. In addition, since the resin mortar has a high specific gravity, it is easy to fill the voids with resin, reduce the entry of voids, and achieve uniform quality. In addition, since resin mortar generates little heat, the volume of the filling resin can be increased as compared with the epoxy resin. There is no need to process and fit a wooden plug along the insertion groove as in the prior art, and the groove can be filled only with resin mortar as in the present invention.

  In addition, when the joint between the wood pillars and the pillars and the beam and the beam is subjected to a bending load, the portion subjected to the tension splits outward and leads to breakage, but the fiber sheet is wound around the joint, and the fiber sheet The resin is impregnated with resin and cured to restrain the wood and improve the bending strength.

  Furthermore, according to the method for demolishing building wood according to the present invention, most of the waste wood discharged from houses and the like is structural materials such as columns and beams. Can be used. In addition, when the insertion groove in which the connecting rebar is inserted is punched out, it becomes slightly larger than the original size, but this resin mortar generates heat even if the volume of the resin mortar filled in the insertion groove during reuse increases. Because there are few, etc., it can be reused without problems.

(1) is an exploded perspective view of a pillar and beam of a wooden building, and (2) is a perspective view of a beam with a connecting rebar inserted into a groove. The method of joining a column and a beam is shown. (1) is a cross-sectional view in the lateral direction of the joint between the column and the beam, and (2) is a cross-sectional view in the same vertical direction. (1) is sectional drawing of the junction part of a pillar and a beam, (2) is the perspective view. (1) is a perspective view showing a method for joining columns, (2) is a perspective view showing a method for joining beams, and (3) is a perspective view showing a method for forming a truss. It is the side view (1) which shows 2nd Example of this invention, and a front view (2). It is a perspective view which shows the demolition method of a pillar and a beam with the demolition method which concerns on this invention. The dismantling method according to the present invention shows dismantling of columns and beams, (1) is a perspective view, and (2) is a cross-sectional view. FIGS. 2A and 2B show drawing of a reinforcing bar of a beam by a disassembling method according to the present invention, wherein FIG. 1A is a plan view and FIG. It is the beam which pulled out the reinforcing bar by the dismantling method which concerns on this invention, (1) is a top view, (2) is sectional drawing. It is the beam which pulled out the reinforcing bar and resin mortar by the dismantling method concerning the present invention, (1) is a top view and (2) is a sectional view.

  DESCRIPTION OF EMBODIMENTS Embodiments of a method for joining building wood and a method for disassembling the same according to the present invention will be described in detail based on the drawings. First, a method for joining building wood will be described, and then a method for dismantling building wood will be described. Moreover, in each embodiment, the same configuration is described with the same reference numerals, and only different configurations are described with different reference numerals.

  As shown in FIG. 1, in the method for joining architectural timbers according to the present invention, an insertion groove is formed between both timbers, a connecting reinforcing bar is inserted into the insertion groove, and resin mortar is filled to join. And both the timbers joined by the joining method are cut and cut with a cutter, and the connecting rebar and the resin mortar are removed by punching out the insertion groove.

  In the method for joining architectural timbers according to the present invention, the joining of columns and beams of a wooden building will be described with reference to the drawings. In order to join the wooden column 1 and the beam 2, as shown in FIG. 1 (1), the joint end surface 3 to the beam column, that is, a plane U-shape from the end surface 3 to the longitudinal direction (axial direction). The groove 4 is formed.

  As shown in (2) of the figure, the groove 4 has an arbitrary depth 7 at which a connecting rebar 5 which is a steel rod, for example, is positioned along the longitudinal axis 6 of the beam. That is, the depth from the surface 8 of the beam to the axis 6 of the beam is determined, and the axial length 9 of the beam is determined according to the required yield strength. For example, the length is set such that the connecting reinforcing bar 5 having a length 15 times the connecting reinforcing bar diameter is accommodated.

On the other hand, a hole 10 is also formed in the pillar 1 in a direction intersecting perpendicularly to the axial direction (longitudinal direction). The hole 10 is on an extension line of an arbitrary axis 6 in the longitudinal direction of the beam 2, and the length thereof is determined according to the required yield strength. For example, the length is reduced by 10 mm from the thickness of the pillar 1.

  Next, the pillar 1 with the hole 10 formed in this way and the beam 2 with the groove 4 formed are joined. As shown in FIG. When the groove 4 and the hole 10 are joined together with the side surface 14, an insertion groove 15 extending between the column 1 and the beam 2 is formed. Then, the connecting rebar 5 is arranged at a position located at the center of the beam axis 6 of the insertion groove 15 and the hole 10 of the column 1.

  Next, as will be described later, in order to prevent the resin mortar 16 filled in the insertion groove 15 from flowing out from the opening 17 of the groove 4, the opening 17 is closed with an adhesive tape 18. The adhesive tape 18 is made of a strong aluminum tape that is less stretched by heat. Then, a resin mortar 16 formed by mixing natural aggregate or synthetic aggregate into the synthetic adhesive is injected and filled into the insertion groove 15 where the connecting reinforcing bars 5 are arranged from the injection hole 11.

The resin mortar 16 is made of synthetic resin adhesive, natural or synthetic such as silica, quartz, limestone, cryolite, flint, aluminum oxide, garnet, stone, slag, molten alumina, silicon carbide, ceramic, and marble. It is a mixture of system aggregates. Hereinafter, properties of the resin mortar 16 and the epoxy resin will be compared.

  As described above, the resin mortar 16 is characterized by the fact that the filler (inorganic aggregate) is added to the adhesive, whereby the heat generated by curing, the shrinkage due to curing, and the coefficient of thermal expansion are reduced, and the stress at the bonding interface can be reduced. Since the shrinkage and strain are small and the dimensional stability is good, it can be placed on a large section. In addition, since the specific gravity is high, it is easy to fill the voids with resin, it is possible to reduce the entry of voids, and the quality can be made uniform. The curing reaction is uniform. High physical strength such as hardness and compressive strength. Furthermore, heat conductivity, chemical resistance, water resistance and the like are good, and the cost can be reduced because sand (fine aggregate) is contained.

  In order to confirm the completion of the filling operation while filling the resin mortar 16, it is visually confirmed that the resin mortar 16 comes out from the air hole 12. Thereafter, the adhesive tape 18 is peeled off from the opening 17 when the filled resin mortar 16 is cured by curing.

  Thus, after filling the insertion groove 15 with the resin mortar 16 and hardening it, when the tape 18 is peeled from the opening 17, the pillar 1 and the beam 2 are joined as shown in FIG. The In the present embodiment, the connection between the column 1 and the beam 2 has been described. However, this is not limited to the column 1 and the beam 2, and is shown in FIGS. 4-A (1), (2), and (3). Thus, the present invention can also be applied to the joining of the column 1 and the column 1, the beam 2 and the beam 2, or the diagonal member for forming the truss.

  In the second embodiment of the present invention, as shown in FIG. 4B, when the wood to be joined is the pillar 1 and the pillar 1, or the beam 2 and the beam 2, the two woods 1, 1 ( 2 and 2) a resin is applied to the outer peripheral surface, and the fiber sheet 18a is wound, and the resin is impregnated from the fiber sheet 18a to be cured.

  The fiber sheet 18a is a high-strength fiber sheet such as a carbon fiber sheet, an aramid fiber sheet, a vinylon sheet, or a glass fiber sheet. As shown in FIG. 4-B (1), the range in which these fiber sheets 18a are wound around the wood is at least that from the point that the 45 ° diagonal line from the end of the connecting rebar 5 reaches the side of the wood 1 (2). It winds so that a fiber sheet edge part may be located in the above position, makes 1 round of the timber 1 (2), and makes the edge part of the fiber sheet 18a overlap 10 cm or more.

Further, in order to bring the fiber sheet 18a and the wood 1 (2) into close contact with each other, the corners of the wood 1 (2) are chamfered and curved to prevent the fiber sheet 18a from floating. By reinforcing the joint portion between the woods in this way, it is restrained that the portion on the tension side of the wood is cracked and spread, and the bending strength of the wood joint portion is improved. For example, when a carbon fiber sheet having a fiber basis weight of 300 g / m ² and a tensile strength of 3400 N / mm ² was wound in a single layer, the bending strength was improved by 24%.

  Next, a disassembly method for disassembling both pieces of wood joined by the above-described construction wood joining method will be described. Since the pillar 1 and the beam 2 are joined by the resin mortar 16 containing the connecting rebar 5, as shown in FIG. 5, the diamond cutter 20 is inserted between the joints 19 of the pillar 1 and the beam 2. Disconnect. Thereby, as shown in FIGS. 6A and 6B, the pillar 1 and the beam 2 are separated.

  Then, the connecting rebar 5 and the resin mortar 16 in the insertion groove 15 between the separated pillar 1 and beam 2 are removed. As shown in FIG. 7, the core drill 22 having a diameter larger than that of the groove 4 from the cut surface 21 of the beam 2 is cored to the insertion length of the cut reinforcing bar 23 to be cut from the reinforcing bar 23. A part of the resin mortar 24 is threaded. Thus, in order to cut the wood slightly larger than the groove 4, a cut hole 25 larger than the original groove 4 is opened as shown in FIG. However, at this time, since only the cut reinforcing bar 23 is pulled out, the cut resin mortar 24 remains.

  Next, when the remaining resin mortar 24 is cut out of the wood slightly larger than the groove 4 and pulled out in the same manner as described above, a beam in which a groove 26 larger than the original groove 4 is formed as shown in FIG. 27, and this is reused as a new beam 27. Moreover, although the said Example demonstrated the method of pulling out the rebar 23 and the resin mortar 24 of the beam 2, the rebar 23 and the resin mortar 24 of the pillar 1 are pulled out similarly to the above.

  The building wood joining method and disassembling method according to the present invention are not limited to wood joining, but can also be applied to joining and disassembling synthetic resin members.

1 pillar,
2,27 beams,
3 joint end face,
4, 26 Beam groove,
5 connecting reinforcing bars,
6 Longitudinal axis of the beam,
7 Depth of beam groove,
8 One side of the beam
9 The length of the groove in the beam,
10 holes,
11 injection hole,
12 Air vent hole,
13 Length of pillar groove,
14 Side of the pillar,
15 Insertion groove,
16 Resin mortar,
17 opening,
18 adhesive tape, 18a fiber sheet,
19 Between joints,
20 Diamond cutter,
21 Beam cross section,
22 Core drill,
23 Cut rebar,
24 cut resin mortar,
25 Cut-out hole,
28 Diagonal material.

Claims (5)

After joining one timber and the other timber, and inserting the connecting rebar into the insertion groove formed from one timber to the other timber in the surface-joined part,
Filling the insertion groove with a resin mortar formed by mixing a synthetic adhesive with a natural aggregate or a synthetic aggregate;
A method of joining architectural timber characterized by If there is an opening in the side of the wood in the insertion groove, stick the adhesive tape to the opening after inserting the connecting rebar into the insertion groove, and then the resin mortar is filled into the insertion groove Cover with the adhesive tape until cured,
The method for joining architectural timber according to claim 1. The connecting rebar is a steel bar,
The method for joining building wood according to any one of claims 1 to 2. When the wood to be joined is a pillar and a pillar, or a beam and a beam, the fiber sheet is wound around the outer peripheral surface of both woods at the joint, and the fiber sheet is impregnated with resin and cured.
The method for joining architectural timber according to any one of claims 1 to 3. In order to dismantle both timbers joined by the method for joining building timber according to claims 1 to 3, a cutter is inserted between the joints of the two timbers to cut the connecting reinforcing bars and the cured resin mortar. After separating the above, the connecting rebar and the resin mortar are removed by punching out the insertion groove in these woods with a punching means,
A method of dismantling architectural timber characterized by

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