JP7036330B1 - How to bury reinforcements in wooden members - Google Patents

How to bury reinforcements in wooden members Download PDF

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JP7036330B1
JP7036330B1 JP2021112582A JP2021112582A JP7036330B1 JP 7036330 B1 JP7036330 B1 JP 7036330B1 JP 2021112582 A JP2021112582 A JP 2021112582A JP 2021112582 A JP2021112582 A JP 2021112582A JP 7036330 B1 JP7036330 B1 JP 7036330B1
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reinforcing bar
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wooden member
hole
burying
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勇治 小坂
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Komatsu Matere Co Ltd
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Abstract

【課題】 誘電加熱方法と熱伝導加熱方法の双方を用いて、木製部材を非接合部材に短時間で確実に且つ強固に接合するための方法、及び、木製部材を短時間で且つ強固に補強するための方法の提供。【解決手段】 本発明に係る木製部材内への補強筋埋設方法は、木製部材内に補強筋を埋設する方法であって、上記木製部材に補強筋埋設用孔を穿設する孔穿設工程と、該補強筋埋設用孔に上記補強筋を挿入する補強筋挿入工程と、上記補強筋埋設用孔内にエポキシ系接着剤を充填する接着剤充填工程と、上記補強筋埋設用孔の長手方向に沿って且つ上記木製部材を挟んで一対の電極を配し高周波電力を印加する印加工程と、該印加によって上記木製部材内の上記接着剤を加熱して当該接着剤を硬化させる接着剤硬化工程を備え、該接着剤硬化工程において、上記木製部材の内部温度が100℃を超えないように上記高周波電力の印加を調整する。【選択図】 図3PROBLEM TO BE SOLVED: To securely and firmly join a wooden member to a non-bonded member in a short time by using both a dielectric heating method and a heat conduction heating method, and to reinforce the wooden member in a short time and firmly. Providing a way to do it. SOLUTION: The method of embedding a reinforcing bar in a wooden member according to the present invention is a method of embedding a reinforcing bar in a wooden member, and is a hole drilling step of drilling a hole for embedding a reinforcing bar in the wooden member. A reinforcing bar insertion step of inserting the reinforcing bar into the reinforcing bar burying hole, an adhesive filling step of filling the reinforcing bar burying hole with an epoxy adhesive, and a length of the reinforcing bar burying hole. An application step in which a pair of electrodes are arranged along the direction and sandwiching the wooden member to apply high-frequency power, and an adhesive curing that heats the adhesive in the wooden member by the application to cure the adhesive. A step is provided, and in the adhesive curing step, the application of the high frequency power is adjusted so that the internal temperature of the wooden member does not exceed 100 ° C. [Selection diagram] Fig. 3

Description

本発明は、例えば木製部材(木製の柱等)を接合部材として木製梁やコンクリート基礎、鋼材等の被接合部材と補強筋を介して接合する場合や、木製部材自体を補強する場合に、木製部材内に充填した接着剤を用いて補強筋を埋設する方法に関する。 The present invention is made of wood, for example, when a wooden member (wooden pillar, etc.) is used as a joining member and is joined to a member to be joined such as a wooden beam, a concrete foundation, or a steel material via a reinforcing bar, or when the wooden member itself is reinforced. The present invention relates to a method of burying reinforcing bars using an adhesive filled in a member.

従来、下記特許文献1,2に示すように、木製部材を接合するにあたり、被接合部材側に固定されている補強筋を当該木製部材内に接着剤を介して埋設することにより、当該木製部材と被接合部材とを強固に接合することが一般的に行われている。 Conventionally, as shown in Patent Documents 1 and 2 below, when joining a wooden member, the wooden member is embedded by embedding a reinforcing bar fixed to the member to be joined in the wooden member via an adhesive. It is common practice to firmly join the member to be joined.

この場合、接着剤の硬化促進のために、充填前の接着剤を予め温めると共に、充填された接着剤が存する箇所の周りを毛布などで覆って加熱する方法等が採られていたが、このような熱伝導加熱方法では温度上昇のスピードが遅いと共に木製部材内部の接着剤を効果的に加熱することは困難であるため、当然に接着剤の硬化促進への貢献は限定的なものであった。 In this case, in order to accelerate the curing of the adhesive, a method has been adopted in which the adhesive before filling is preheated and the area where the filled adhesive is present is covered with a blanket or the like to heat the adhesive. With such a heat conduction heating method, the speed of temperature rise is slow and it is difficult to effectively heat the adhesive inside the wooden member, so naturally the contribution to the promotion of curing of the adhesive is limited. rice field.

他方、集成材をはじめとした木製部材の製造現場において、木製ラミナを集成接着する際に、複数のラミナを所望構成に配列し、これら木製ラミナを上下左右から加圧しつつ、高周波電力を印加してレゾルシノール系接着剤の硬化促進を図ることが知られている。たとえば、下記特許文献3には、木製板と樹脂製板の積層接着において、高周波電力による加熱で接着剤の硬化促進を図ることが開示されている。 On the other hand, at the manufacturing site of wooden members such as laminated lumber, when the wooden lamina is laminated and bonded, a plurality of lamina are arranged in a desired configuration, and high frequency power is applied while pressurizing these wooden lamina from the top, bottom, left and right. It is known to promote the curing of resorcinol-based adhesives. For example, Patent Document 3 below discloses that in laminating and adhering a wooden plate and a resin plate, the curing of the adhesive is promoted by heating with high frequency power.

したがって、下記特許文献3に開示されている木製材料の接着における高周波電力の印加による誘電加熱を、下記特許文献1,2に示すような木製部材内への補強筋埋設に適用する発想は当業者であれば容易になし得る。 Therefore, those skilled in the art have the idea of applying the dielectric heating by applying high frequency power in the bonding of a wooden material disclosed in Patent Document 3 below to the embedding of reinforcing bars in a wooden member as shown in Patent Documents 1 and 2 below. If so, it can be done easily.

実公平7-34962号公報Jitsufuku No. 7-34962 Gazette 特許第4704863号公報Japanese Patent No. 4704863 特開2011-167986号公報Japanese Unexamined Patent Publication No. 2011-167986

誘電加熱においては、誘電体損失係数が高いものから順に加熱される特性を有しており、木製部材同士の接着に用いられるレゾシノール系接着剤のように木製部材よりも誘電体損失係数が高い接着剤であれば、当該接着剤を優先的に加熱し、有効に硬化促進を図ることができるものの、補強筋の埋設に用いられるエポキシ系接着剤のように木製部材よりも誘電体損失係数が低い接着剤の場合、当該接着剤よりも先に木製部材が加熱され内部温度が高温となってしまい、この過加熱により当該木製部材自身が材色変化や強度劣化してしまうことが知られている。 In dielectric heating, it has the property of being heated in order from the one with the highest dielectric loss coefficient, and adhesion with a higher dielectric loss coefficient than wooden members, such as the resosinol adhesive used for bonding wooden members to each other. If it is an agent, the adhesive can be heated preferentially to effectively promote curing, but the dielectric loss coefficient is lower than that of wooden members such as epoxy adhesives used for burying reinforcing bars. In the case of an adhesive, it is known that the wooden member is heated before the adhesive and the internal temperature becomes high, and this overheating causes the wooden member itself to change its color and deteriorate in strength. ..

よって、エポキシ系接着剤を用いた木製部材内への補強筋の埋設においては、熱伝導加熱による問題点を解消するために、誘電加熱による接着剤硬化促進を想起することはあっても、接着剤よりも先に木製部材の内部が高温になってしまう問題点を考慮して実施はされていないのが実情である。 Therefore, in the case of burying reinforcing bars in a wooden member using an epoxy adhesive, in order to solve the problem caused by heat conduction heating, it may be recalled that the adhesive is cured by dielectric heating, but the adhesive is adhered. The fact is that it has not been implemented in consideration of the problem that the inside of the wooden member becomes hot before the agent.

本発明者は、上述した熱伝導加熱方法の問題点と誘電加熱方法の問題点を、これら両加熱方法をハイブリッドに用いることにより解消できることを見出し、本発明を想到するに至ったものである。 The present inventor has found that the above-mentioned problems of the heat conduction heating method and the problems of the dielectric heating method can be solved by using both of these heating methods in a hybrid manner, and came up with the present invention.

本発明に係る補強筋埋設方法は、誘電加熱方法と熱伝導加熱方法の双方を用いて、木製部材を被接合部材に短時間で確実に且つ強固に接合するための方法、及び、木製部材を短時間で且つ強固に補強するための方法を提供するものである。 The reinforcing bar burying method according to the present invention is a method for reliably and firmly joining a wooden member to a member to be joined in a short time by using both a dielectric heating method and a heat conduction heating method, and a wooden member. It provides a method for reinforcing firmly in a short time.

要述すると、本発明に係る木製部材内への補強筋埋設方法(以下、単に「補強筋埋設方法」という。)は、木製部材内に補強筋を埋設する方法であって、次の工程を備えることを特徴とする。 In short, the method of burying reinforcing bars in a wooden member according to the present invention (hereinafter, simply referred to as "method of burying reinforcing bars") is a method of burying reinforcing bars in a wooden member, and the following steps are performed. It is characterized by being prepared.

すなわち、上記木製部材に補強筋埋設用孔を穿設する孔穿設工程と、該補強筋埋設用孔に上記補強筋を挿入する補強筋挿入工程と、上記補強筋埋設用孔内にエポキシ系接着剤を充填する接着剤充填工程と、上記補強筋埋設用孔の長手方向に沿って且つ上記木製部材を挟んで一対の電極を配し当該木製部材に高周波電力を印加する印加工程と、該印加による誘電加熱によって上記木製部材を加熱すると共に、該加熱された木製部材からの熱伝導加熱によって同木製部材内の上記接着剤を加熱して当該接着剤を硬化させる接着剤硬化工程を備え、該接着剤硬化工程において、上記木製部材の内部温度が100℃を超えないように上記高周波電力の印加を調整する。 That is, a hole drilling step of drilling a hole for embedding a reinforcing bar in the wooden member, a reinforcing bar inserting step of inserting the reinforcing bar into the hole for embedding the reinforcing bar, and an epoxy system in the hole for embedding the reinforcing bar. An adhesive filling step of filling the adhesive, an application step of arranging a pair of electrodes along the longitudinal direction of the reinforcing bar burying hole and sandwiching the wooden member, and applying high frequency power to the wooden member , and the same. An adhesive curing step of heating the wooden member by dielectric heating by application and heating the adhesive in the wooden member by heat conduction heating from the heated wooden member to cure the adhesive. In the adhesive curing step, the application of the high frequency power is adjusted so that the internal temperature of the wooden member does not exceed 100 ° C.

これにより誘電加熱によって木製部材を劣化防止しつつ加熱すると共に、該加熱された木製部材からの熱伝導加熱によって接着剤を加熱することができ、短時間で確実且つ強固に木製部材を被接合部材に接合することができる。また、短時間で確実且つ強固に木製部材を補強できる。 As a result, the wooden member can be heated while preventing deterioration by dielectric heating, and the adhesive can be heated by heat conduction heating from the heated wooden member, so that the wooden member can be reliably and firmly bonded to the member in a short time. Can be joined to. In addition, the wooden member can be reinforced reliably and firmly in a short time.

また、本発明にあっては、上記補強筋として、金属製又は繊維強化プラスチック製の棒状体、つまり、従来、補強筋として実績があると共に広く利用されているものを用いることができる。 Further, in the present invention, as the reinforcing bar, a rod-shaped body made of metal or fiber reinforced plastic, that is, a rod-shaped body which has been conventionally used as a reinforcing bar and is widely used can be used.

上記接着剤は、二液硬化型のエポキシ系接着剤とし、硬化開始タイミングを調整できるようにすると共に、高硬度の接着剤層(補強筋埋設層)を形成できるようにする。 The adhesive is a two-component curing type epoxy adhesive so that the curing start timing can be adjusted and a high-hardness adhesive layer (reinforcing bar embedded layer) can be formed.

また、上記印加工程及び上記接着剤硬化工程は、電源側電極とアース側電極を入れ替えて、複数回行うことにより、木製部材の深部にある接着剤をムラなく加熱することができる。 Further, by performing the application step and the adhesive curing step a plurality of times by exchanging the power source side electrode and the ground side electrode, the adhesive deep in the wooden member can be heated evenly.

本発明に係る補強筋埋設方法によれば、シンプルな方法ながらも、木製部材を被接合部材に短時間で確実且つ強固に接合することができると共に、木製部材を短時間で確実且つ強固に補強することができる。 According to the reinforcing bar burying method according to the present invention, the wooden member can be reliably and firmly joined to the member to be joined in a short time, and the wooden member can be reliably and firmly reinforced in a short time, although it is a simple method. can do.

実施例1の補強筋埋設方法における補強筋挿入工程を示す斜視図である。It is a perspective view which shows the reinforcing bar insertion process in the reinforcing bar embedding method of Example 1. FIG. 実施例1の補強筋埋設方法における接着剤充填工程を示す斜視図である。It is a perspective view which shows the adhesive filling process in the reinforcement reinforcement embedding method of Example 1. FIG. 実施例1の補強筋埋設方法における印加工程及び接着剤硬化工程を示す斜視図である。It is a perspective view which shows the application process and the adhesive hardening process in the reinforcing bar embedding method of Example 1. FIG. 実施例2の補強筋埋設方法における補強筋挿入工程を示す斜視図である。It is a perspective view which shows the reinforcing bar insertion process in the reinforcing bar embedding method of Example 2. FIG. 実施例2の補強筋埋設方法における接着剤充填工程を示す斜視図である。It is a perspective view which shows the adhesive filling process in the reinforcement reinforcement embedding method of Example 2. FIG. 実施例2の補強筋埋設方法における印加工程及び接着剤硬化工程を示す斜視図である。It is a perspective view which shows the application process and the adhesive hardening process in the reinforcing bar embedding method of Example 2. FIG. 実施例3の補強筋埋設方法における補強筋挿入工程を示す斜視図である。It is a perspective view which shows the reinforcing bar insertion process in the reinforcing bar embedding method of Example 3. FIG. 実施例3の補強筋埋設方法における接着剤充填工程を示す斜視図である。It is a perspective view which shows the adhesive filling process in the reinforcement reinforcement embedding method of Example 3. FIG. 実施例3の補強筋埋設方法における印加工程及び接着剤硬化工程を示す斜視図である。It is a perspective view which shows the application process and the adhesive hardening process in the reinforcing bar embedding method of Example 3. FIG. 実施例4の補強筋埋設方法における補強筋挿入工程を示す斜視図である。It is a perspective view which shows the reinforcing bar insertion process in the reinforcing bar embedding method of Example 4. FIG. 実施例4の補強筋埋設方法における接着剤充填工程を示す斜視図である。It is a perspective view which shows the adhesive filling process in the reinforcement reinforcement embedding method of Example 4. FIG. 実施例4の補強筋埋設方法における印加工程及び接着剤硬化工程を示す斜視図である。It is a perspective view which shows the application process and the adhesive hardening process in the reinforcement reinforcement embedding method of Example 4. FIG. 実施例5の補強筋埋設方法における補強筋挿入工程を示す斜視図である。It is a perspective view which shows the reinforcing bar insertion process in the reinforcing bar embedding method of Example 5. 実施例5の補強筋埋設方法における接着剤充填工程を示す斜視図である。It is a perspective view which shows the adhesive filling process in the reinforcing bar embedding method of Example 5. 実施例5の補強筋埋設方法における印加工程及び接着剤硬化工程を示す斜視図である。It is a perspective view which shows the application process and the adhesive hardening process in the reinforcing bar embedding method of Example 5.

本発明に係る補強筋埋設方法の最適な実施例について、図1乃至図15に基づき、説明する。 Optimal examples of the reinforcing bar burying method according to the present invention will be described with reference to FIGS. 1 to 15.

なお、図1乃至図3は、木製部材10をコンクリート製の被接合部材20に接合するときの補強筋埋設方法(実施例1)を示しており、図4乃至図6は、木製部材10を鋼製の被接合部材20に接合するときの補強筋埋設方法(実施例2)を示しており、図7乃至図9は、木製部材10を木製の被接合部材20に接合するときの補強筋埋設方法(実施例3)を示しており、図10乃至図12は、木製部材10自体を補強するときの補強筋埋設方法(実施例4)を示しており、図13乃至図15は、木製部材10自体を補強しつつ接合するときの補強筋埋設方法(実施例5)を示している。 1 to 3 show a method of embedding a reinforcing bar (Example 1) when the wooden member 10 is joined to the concrete bonded member 20, and FIGS. 4 to 6 show the wooden member 10. A method of embedding reinforcing bars (Example 2) when joining a steel member to be joined 20 is shown, and FIGS. 7 to 9 show reinforcing bars when the wooden member 10 is joined to the wooden member to be joined 20. The burying method (Example 3) is shown, FIGS. 10 to 12 show a reinforcing bar burying method (Example 4) when the wooden member 10 itself is reinforced, and FIGS. 13 to 15 are made of wood. The method of embedding a reinforcing bar (Example 5) at the time of joining while reinforcing the member 10 itself is shown.

<基本構成>
本発明に係る補強筋埋設方法は、図1乃至図15に示すように、木製の建築材料の如き木製部材10内へ接着剤を介して補強筋1を埋設する方法である。木製部材10としては、無垢の木製部材の他、構造用の集成材やLVL(Laminated Veneer Lumber:単板積層材)、CLT(Cross Laminated Timber)を用いることができる。
<Basic configuration>
As shown in FIGS. 1 to 15, the reinforcing bar burying method according to the present invention is a method of burying the reinforcing bar 1 in a wooden member 10 such as a wooden building material via an adhesive. As the wooden member 10, in addition to a solid wooden member, structural laminated lumber, LVL (Laminated Veneer Lumber: single plate laminated lumber), and CLT (Cross Laminated Timber) can be used.

本発明に係る補強筋埋設方法は、基本構成として、次の各工程を備える。すなわち、木製部材10に補強筋埋設用孔12を穿設する孔穿設工程と、該補強筋埋設用孔12に補強筋1を挿入する補強筋挿入工程と、該補強筋埋設用孔12内に接着剤2を充填し該接着剤2で補強筋1の外表面を覆う接着剤充填工程と、該補強筋埋設用孔12の長手方向に沿って且つ木製部材10を挟んで一対の電極31・32を配し非加圧で高周波電力を印加する印加工程と、該印加によって木製部材10内の接着剤2を所定温度以上になるまで加熱して当該接着剤2を硬化させる接着剤硬化工程を備えるものである。 The reinforcing bar burying method according to the present invention includes the following steps as a basic configuration. That is, a hole drilling step of piercing the reinforcing bar burying hole 12 in the wooden member 10, a reinforcing bar inserting step of inserting the reinforcing bar 1 into the reinforcing bar burying hole 12, and the inside of the reinforcing bar burying hole 12. The adhesive filling step of filling the adhesive 2 with the adhesive 2 to cover the outer surface of the reinforcing bar 1 and the pair of electrodes 31 along the longitudinal direction of the reinforcing bar burying hole 12 and sandwiching the wooden member 10. An application step of arranging 32 and applying high-frequency power without pressurization, and an adhesive curing step of heating the adhesive 2 in the wooden member 10 to a predetermined temperature or higher to cure the adhesive 2. It is equipped with.

補強筋1としては、異形鉄筋、全ネジボルト、丸鋼等の金属製の棒状体の他、炭素繊維強化プラスチック、アラミド繊維強化プラスチック等の繊維強化プラスチック製の棒状体を使用することができる。必要な強度や使用箇所の耐荷重によって適宜使い分けることができる。埋設する補強筋の本数は接合箇所や補強箇所によって適宜調整することができる。このように導電性を有する補強筋1を用いたとしても、本発明に係る補強筋埋設方法にあっては、適切に誘電加熱を行うことができる。 As the reinforcing bar 1, in addition to a metal rod-shaped body such as a deformed reinforcing bar, a full screw bolt, and round steel, a fiber-reinforced plastic rod-shaped body such as carbon fiber reinforced plastic and aramid fiber reinforced plastic can be used. It can be used properly according to the required strength and the load capacity of the place of use. The number of reinforcing bars to be buried can be appropriately adjusted depending on the joints and reinforcing points. Even if the reinforcing bar 1 having conductivity as described above is used, the dielectric heating can be appropriately performed in the reinforcing bar burying method according to the present invention.

また、接着剤2としては、エポキシ系接着剤を用いる。エポキシ系接着剤は硬化後、高強度の接着剤層を形成し補強筋1を確実に埋設する。エポキシ系接着剤は、高周波(短波:3~30MHz,超短波:30~300MHz)に対する誘電体損失係数が、構造材として使用するために乾燥させた木製部材10の誘電体損失係数よりも総じて低いことが知られている。よって、誘電加熱においては、木製部材10の方が接着剤2よりも優先的に加熱され、当該加熱された木製部材10から熱伝導して接着剤2が加熱される。 Further, as the adhesive 2, an epoxy adhesive is used. After curing, the epoxy adhesive forms a high-strength adhesive layer and securely embeds the reinforcing bar 1. Epoxy adhesives have a generally lower dielectric loss coefficient for high frequencies (shortwave: 3-30 MHz, ultra-shortwave: 30-300 MHz) than the dielectric loss coefficient of the dried wooden member 10 for use as a structural material. It has been known. Therefore, in the dielectric heating, the wooden member 10 is heated preferentially over the adhesive 2, and heat is conducted from the heated wooden member 10 to heat the adhesive 2.

好ましくは、接着剤2として、液体の主剤と液体の硬化剤から成る二液硬化型のエポキシ系接着剤を用い、硬化開始タイミングを調整できるようにすると共に、高硬度の接着剤層(補強筋埋設層)を形成できるようにする。接着剤2の粘度は、補強筋1の外表面全体への周りこみと当該外表面での保持性の両立を考慮し、適宜調整できる。 Preferably, as the adhesive 2, a two-component curing type epoxy adhesive composed of a liquid main agent and a liquid curing agent is used so that the curing start timing can be adjusted and a high-hardness adhesive layer (reinforcing bar) is used. (Buried layer) can be formed. The viscosity of the adhesive 2 can be appropriately adjusted in consideration of both the wraparound of the reinforcing bar 1 on the entire outer surface and the retention on the outer surface.

次いで、本発明に係る補強筋埋設方法の各工程について詳述する。 Next, each step of the reinforcing bar burying method according to the present invention will be described in detail.

<孔穿設工程,補強筋挿入工程>
図1,図4,図7,図10,図13に示すように、補強筋1が埋設される木製部材10には、部材製造工場又は工事現場において、補強筋1を挿入する補強筋埋設用孔12を予め穿設する。該補強筋埋設用孔12は接合面11において開口している。そして、該補強筋埋設用孔12内に補強筋1を挿入する。補強筋1の本数は必要な強度等により適宜選択し、該補強筋1の本数に対応する数の補強筋埋設用孔12を穿設する。なお、図中の13は各補強筋埋設用孔12にそれぞれ連通する接着剤充填用孔である。
<Hole drilling process, reinforcing bar insertion process>
As shown in FIGS. 1, 4, 7, 10, and 13, the wooden member 10 in which the reinforcing bar 1 is embedded is used for embedding the reinforcing bar 1 in the member manufacturing factory or the construction site. The hole 12 is pre-drilled. The reinforcing bar burying hole 12 is open at the joint surface 11. Then, the reinforcing bar 1 is inserted into the reinforcing bar burying hole 12. The number of reinforcing bars 1 is appropriately selected depending on the required strength and the like, and the number of reinforcing bar burying holes 12 corresponding to the number of reinforcing bars 1 is bored. Note that 13 in the figure is an adhesive filling hole that communicates with each reinforcing bar burying hole 12.

補強筋埋設用孔12の孔径は、補強筋1の直径(最大直径)の1.2倍~1.5倍の孔径として、補強筋1の位置ズレや傾きを吸収できるようにすると共に、十分な量の接着剤2で補強筋1の外表面、特に外周面を覆うことができるようにする。また、補強筋埋設用孔12の孔長は、補強筋1の埋設長よりも長くし、補強筋1の端部における外表面を適切に接着剤2で覆うことができるようにする。 The hole diameter of the hole 12 for embedding the reinforcing bar is set to 1.2 to 1.5 times the diameter (maximum diameter) of the reinforcing bar 1 so as to be able to absorb the positional deviation and inclination of the reinforcing bar 1 and to be sufficient. A large amount of the adhesive 2 can cover the outer surface of the reinforcing bar 1, particularly the outer peripheral surface. Further, the hole length of the reinforcing bar burying hole 12 is made longer than the burying length of the reinforcing bar 1, so that the outer surface at the end portion of the reinforcing bar 1 can be appropriately covered with the adhesive 2.

実施例1乃至実施例3,実施例5のように、木製部材10を被接合部材20と接合するときの補強筋埋設においては、図1,図4,図7,図13に示すように、補強筋1の一端部1aを被接合部材20側に固定して、当該被接合部材20の接合面21から上記補強筋1の他端部1bを突出して設け、該突出部分を補強筋埋設用孔12内に立て込んで挿入することにより、接合面11と接合面21を突き合せる。 In embedding reinforcing bars when the wooden member 10 is joined to the member to be joined 20 as in Examples 1 to 3 and 5, as shown in FIGS. 1, 4, 7, and 13. One end 1a of the reinforcing bar 1 is fixed to the joined member 20 side, the other end 1b of the reinforcing bar 1 is provided so as to project from the joining surface 21 of the joined member 20, and the protruding portion is used for embedding the reinforcing bar. The joint surface 11 and the joint surface 21 are abutted by inserting the joint surface upright into the hole 12.

つまり、実施例1(図1)においては、コンクリート製の被接合部材20内に補強筋1の一端部1aを含む部分を埋設し、他端部1bを自由端とした残りの部分を接合面21より突出させて配し、突出部分を補強筋埋設用孔12内に挿入する。 That is, in the first embodiment (FIG. 1), a portion including one end portion 1a of the reinforcing bar 1 is embedded in the concrete bonded member 20, and the remaining portion with the other end portion 1b as a free end is a joint surface. It is arranged so as to protrude from 21 and the protruding portion is inserted into the reinforcing bar burying hole 12.

実施例2(図4)においては、鋼製の被接合部材20の接合面21に補強筋1の一端部1aを溶接等により直接固定し、他端部1bを自由端として接合面21から突設し、突出部分を補強筋埋設用孔12内に挿入する。 In the second embodiment (FIG. 4), one end 1a of the reinforcing bar 1 is directly fixed to the joint surface 21 of the steel object to be joined 20 by welding or the like, and the other end 1b is used as a free end to project from the joint surface 21. The protruding portion is inserted into the reinforcing bar embedding hole 12.

実施例3(図7)においては、木製の被接合部材20にも端部12b′を有する補強筋埋設用孔12′を穿設し、該補強筋埋設用孔12′内に補強筋1の一端部1a側を挿入する一方、木製部材10の補強筋埋設用孔12内に同補強筋1の他端部1b側を挿入する。 In the third embodiment (FIG. 7), a reinforcing bar burying hole 12'having an end portion 12b'is also formed in the wooden bonded member 20, and the reinforcing bar 1 is formed in the reinforcing bar burying hole 12'. While the one end portion 1a side is inserted, the other end portion 1b side of the reinforcing bar 1 is inserted into the reinforcing bar burying hole 12 of the wooden member 10.

実施例5(図13,図14)においては、木製の被接合部材20にも補強筋埋設用孔12′を穿設し、該補強筋埋設用孔12′内に補強筋1の一端部1a側を挿入する一方、木製部材10の補強筋埋設用孔12内に同補強筋1の他端部1b側を貫挿し、別の木製の被接合部材20′にも補強筋埋設用孔12′′を穿設し、該補強筋埋設用孔12′′内に同補強筋1の他端部1bを挿入し、接合面11と接合面21′を突き合せる。 In the fifth embodiment (FIGS. 13 and 14), the reinforcing bar burying hole 12'is also formed in the wooden bonded member 20, and one end portion 1a of the reinforcing bar 1 is formed in the reinforcing bar burying hole 12'. While inserting the side, the other end 1b side of the reinforcing bar 1 is inserted into the reinforcing bar burying hole 12 of the wooden member 10, and the reinforcing bar burying hole 12'is also inserted into another wooden bonded member 20'. ′ Is drilled, the other end 1b of the reinforcing bar 1 is inserted into the reinforcing bar burying hole 12 ″, and the joint surface 11 and the joint surface 21 ′ are butted against each other.

また、実施例4のように、木製部材10自体を補強するときの補強筋埋設においては、図10に示すように、予め穿設された補強筋埋設用孔12内に補強筋1を一端部1a側から挿入し、他端部1bも同補強筋埋設用孔12内に入るように全体的に挿入する。 Further, in the case of burying the reinforcing bar when reinforcing the wooden member 10 itself as in the fourth embodiment, as shown in FIG. 10, one end of the reinforcing bar 1 is provided in the hole 12 for burying the reinforcing bar which has been drilled in advance. It is inserted from the 1a side, and the other end 1b is also inserted as a whole so as to be inside the reinforcing bar burying hole 12.

<接着剤充填工程>
上述のように、各補強筋埋設用孔12内に補強筋1を挿入した後、用意した接着剤2を接着剤充填用孔13から注入し、図2,図5,図8,図11,図14に示すように、補強筋1の外周面1cと補強筋埋設用孔12の内周面12a間、及び、補強筋1の他端部1bと補強筋埋設用孔12の端部12b間に万遍なく接着剤2を行きわたらせ、補強筋1の外表面を接着剤2で覆うように充填する。このように、補強筋1の外表面を接着剤2で覆うことにより、確実に補強筋1を埋設する。
<Adhesive filling process>
As described above, after the reinforcing bar 1 is inserted into each reinforcing bar burying hole 12, the prepared adhesive 2 is injected through the adhesive filling hole 13, and FIGS. 2, FIG. 5, FIG. 8, FIG. 11, As shown in FIG. 14, between the outer peripheral surface 1c of the reinforcing bar 1 and the inner peripheral surface 12a of the reinforcing bar burying hole 12, and between the other end 1b of the reinforcing bar 1 and the end portion 12b of the reinforcing bar burying hole 12. The adhesive 2 is evenly distributed and filled so as to cover the outer surface of the reinforcing bar 1 with the adhesive 2. By covering the outer surface of the reinforcing bar 1 with the adhesive 2 in this way, the reinforcing bar 1 is surely embedded.

また、実施例3(図8)、実施例5(図14)のように、木製の被接合部材20と接合するときには、被接合部材20の補強筋埋設用孔12′へも接着剤2を接着剤充填用孔13′から接着剤2を注入し、補強筋1の外周面1cと補強筋埋設用孔12′の内周面12′a間、及び、補強筋1の一端部1aと補強筋埋設用孔12′の端部12′b間に接着剤2を行きわたらせる。実施例5(図14)においてはさらに、被接合部材20′の補強筋埋設用孔12′′へも接着剤2を注入し、補強筋1の外周面1cと補強筋埋設用孔12′′の内周面12′′a間、及び、補強筋1の一端部1bと補強筋埋設用孔12′′の端部12′′b間に接着剤2を行きわたらせる。。 Further, as in Example 3 (FIG. 8) and Example 5 (FIG. 14), when joining to the wooden bonded member 20, the adhesive 2 is also applied to the reinforcing bar embedding hole 12'of the bonded member 20. Adhesive 2 is injected from the adhesive filling hole 13'to reinforce the space between the outer peripheral surface 1c of the reinforcing bar 1 and the inner peripheral surface 12'a of the reinforcing bar burying hole 12', and one end 1a of the reinforcing bar 1. The adhesive 2 is spread between the ends 12'b of the muscle embedding hole 12'. In Example 5 (FIG. 14), the adhesive 2 is further injected into the reinforcing bar burying hole 12 ″ of the member to be joined 20 ′, and the outer peripheral surface 1c of the reinforcing bar 1 and the reinforcing bar burying hole 12 ″ are further injected. The adhesive 2 is spread between the inner peripheral surface 12 ″ a of the above, and between one end 1b of the reinforcing bar 1 and the end 12 ″ b of the reinforcing bar burying hole 12 ″ b. ..

また、実施例4(図11)のように、木製部材10自体を補強するときには、補強筋1の外周面1cと補強筋埋設用孔12の内周面12a間、及び、補強筋1の一端部1aと補強筋埋設用孔12の端部12b間に接着剤2を行きわたらせると共に、補強筋1の他端部1bを接着剤2で覆いつつ補強筋埋設用孔12の開口部を栓14で塞ぐ。栓14は木製部材10と同じ木材で構成するか、木製部材10と同程度の誘電体損失係数の素材で構成する。誘電加熱により木製部材10と同等に加熱されるためである。 Further, as in the fourth embodiment (FIG. 11), when the wooden member 10 itself is reinforced, the space between the outer peripheral surface 1c of the reinforcing bar 1 and the inner peripheral surface 12a of the reinforcing bar burying hole 12 and one end of the reinforcing bar 1. The adhesive 2 is spread between the portion 1a and the end portion 12b of the reinforcing bar burying hole 12, and the opening of the reinforcing bar burying hole 12 is plugged while covering the other end portion 1b of the reinforcing bar 1 with the adhesive 2. Close with 14. The stopper 14 is made of the same wood as the wooden member 10, or is made of a material having a dielectric loss coefficient similar to that of the wooden member 10. This is because it is heated in the same manner as the wooden member 10 by dielectric heating.

なお、本発明においては、湯煎等の既知の熱伝導加熱方法を用いて、接着剤2を充填前に予め温めておくことを排除しない。 In the present invention, it is not excluded that the adhesive 2 is preheated before filling by using a known heat conduction heating method such as a water bath.

<印加工程,接着剤硬化工程>
上述のように、木製部材10内において補強筋1の周りに接着剤2を充填した後、図3,図6,図9,図12,図15に示すように、当該木製部材10を一対の電極31・32で挟んだ状態で交流電源30から電力を供給することにより、当該木製部材10に高周波電力を印加し、該印加によって接着剤2を加熱して当該接着剤2の硬化促進を図る。
<Applying process, adhesive curing process>
As described above, after the adhesive 2 is filled around the reinforcing bar 1 in the wooden member 10, the wooden member 10 is paired as shown in FIGS. 3, 6, 9, 12, and 15. By supplying electric power from the AC power supply 30 while sandwiched between the electrodes 31 and 32, high-frequency electric power is applied to the wooden member 10, and the adhesive 2 is heated by the application to promote curing of the adhesive 2. ..

印加する高周波電力は、加熱範囲によって適宜調整する。加熱範囲が小さい場合には、たとえば小出力(0.1~5kw)とすることもできる。また、高周波発振器は、既知の電子管式、半導体式の装置を用いることができる。特に半導体式の小型発振器を利用すれば、工事現場での使用や高所での使用において、頗る好都合となる。なお、本発明において、高周波は、誘電加熱において従来用いられている既知の周波数(短波:3~30MHz,超短波:30~300MHz)、波長(短波:100~10m,超短波:10~1m)の電磁波である。 The high frequency power to be applied is appropriately adjusted according to the heating range. When the heating range is small, for example, a small output (0.1 to 5 kW) can be set. Further, as the high frequency oscillator, a known electron tube type or semiconductor type device can be used. In particular, the use of a small semiconductor oscillator is extremely convenient for use at construction sites and high places. In the present invention, the high frequency is an electromagnetic wave having a known frequency (short wave: 3 to 30 MHz, ultra short wave: 30 to 300 MHz) and wavelength (short wave: 100 to 10 m, ultra short wave: 10 to 1 m) conventionally used in dielectric heating. Is.

そして、高周波電力とその印加時間を調整し、温度センサー等の既知のセンシング手段を用いて木製部材10の内部温度が100℃を超えないように且つ高温を保つように監視しつつ印加を行う。木製部材10を誘電加熱により加熱し、当該加熱された木製部材10から接着剤2へと熱伝導加熱する過程において、当該木製部材10の劣化防止を図るためである。 Then, the high-frequency power and its application time are adjusted, and application is performed while monitoring the internal temperature of the wooden member 10 so as not to exceed 100 ° C. and maintain a high temperature by using a known sensing means such as a temperature sensor. This is to prevent deterioration of the wooden member 10 in the process of heating the wooden member 10 by dielectric heating and conducting heat conduction heating from the heated wooden member 10 to the adhesive 2.

上述のように、木製部材10の内部温度を100℃を超えない程度に保つことにより、接着剤2を加熱する。好ましくは、接着剤2の硬化促進のためには当該接着剤2が50~90℃となるように加熱する。なお、本発明にあっては、印加工程及び接着剤硬化工程において、木製部材10の内部に存する接着剤2を加熱し硬化を促すだけで良く、ラミナ接着のように加圧接着は不要である。 As described above, the adhesive 2 is heated by keeping the internal temperature of the wooden member 10 at a level not exceeding 100 ° C. Preferably, in order to accelerate the curing of the adhesive 2, the adhesive 2 is heated to 50 to 90 ° C. In the present invention, in the application step and the adhesive curing step, it is only necessary to heat the adhesive 2 existing inside the wooden member 10 to promote curing, and pressure bonding unlike lamina bonding is not required. ..

電極31と電極32は、上述のとおり、木製部材10を挟んで配し、さらには補強筋埋設用孔12の長手方向に沿って配する。補強筋埋設用孔12内で補強筋1を被覆した状態で充填されている接着剤2を全体的に加熱し硬化促進を図るためである。 As described above, the electrodes 31 and 32 are arranged with the wooden member 10 interposed therebetween, and further arranged along the longitudinal direction of the reinforcing bar embedding hole 12. This is to promote curing by heating the adhesive 2 filled in the reinforcing bar burying hole 12 with the reinforcing bar 1 covered as a whole.

補強筋1の埋設位置、すなわち補強筋埋設用孔12の位置によっては、接着剤2の加熱が不十分となることが予測される場合には、電源側電極とアース側電極を入れ替えて、複数回行うことにより、接着剤2をムラなく加熱することができる。たとえば、電極31が電源側電極で、電極32がアース側電極の場合、これら電極の位置を入れ替えるか、木製部材10の向きを変えて、一方の電極と対峙していた箇所を他方の電極と対峙させる。又は、電極31と電極32の極性を切り替えられるようにしても良い。 If it is predicted that the heating of the adhesive 2 will be insufficient depending on the position where the reinforcing bar 1 is buried, that is, the position of the hole 12 for burying the reinforcing bar, the power supply side electrode and the ground side electrode may be exchanged to form a plurality of electrodes. By repeating this process, the adhesive 2 can be heated evenly. For example, when the electrode 31 is the power supply side electrode and the electrode 32 is the ground side electrode, the positions of these electrodes are exchanged or the direction of the wooden member 10 is changed, and the portion facing one electrode is referred to as the other electrode. Let them face each other. Alternatively, the polarities of the electrode 31 and the electrode 32 may be switched.

以上のとおり、本発明に係る補強筋埋設方法によれば、誘電加熱と熱伝導加熱をハイブリッドすることにより、木製部材10を被接合部材20に短時間で確実且つ強固に接合することができると共に、木製部材10を短時間で確実且つ強固に補強することができる。 As described above, according to the reinforcing bar embedding method according to the present invention, the wooden member 10 can be reliably and firmly bonded to the member to be joined 20 in a short time by hybridizing the dielectric heating and the heat conduction heating. , The wooden member 10 can be reinforced reliably and firmly in a short time.

1…補強筋、1a…一端部、1b…他端部、1c…外周面、2…接着剤、10…木製部材(被接合部材)、11…接合面、12…補強筋埋設用孔、12a…内周面、12b…端部、12′…補強筋埋設用孔、12′a…内周面、12′b…端部、12′′…補強筋埋設用孔、12′′a…内周面、12′′b…端部、13…接着剤充填用孔、14…栓、20…被接合部材、21…接合面、20′…被接合部材、21′…接合面、30…交流電源、31…電極(電源側電極)、32…電極(アース側電極)。 1 ... Reinforcing bar, 1a ... One end, 1b ... The other end, 1c ... Outer surface, 2 ... Adhesive, 10 ... Wooden member (joined member), 11 ... Joint surface, 12 ... Reinforcing bar burying hole, 12a ... Inner peripheral surface, 12b ... End, 12'... Reinforcing bar embedding hole, 12'a ... Inner peripheral surface, 12'b ... End, 12 "... Reinforcing bar embedding hole, 12" a ... Peripheral surface, 12''b ... end, 13 ... adhesive filling hole, 14 ... plug, 20 ... bonded member, 21 ... bonded surface, 20'... bonded member, 21'... joint surface, 30 ... alternating current Power supply, 31 ... Electrode (power supply side electrode), 32 ... Electrode (earth side electrode).

Claims (4)

木製部材内に補強筋を埋設する方法であって、該木製部材に補強筋埋設用孔を穿設する孔穿設工程と、該補強筋埋設用孔に上記補強筋を挿入する補強筋挿入工程と、上記補強筋埋設用孔内にエポキシ系接着剤を充填する接着剤充填工程と、上記補強筋埋設用孔の長手方向に沿って且つ上記木製部材を挟んで一対の電極を配し当該木製部材に高周波電力を印加する印加工程と、該印加による誘電加熱によって上記木製部材を加熱すると共に、該加熱された木製部材からの熱伝導加熱によって同木製部材内の上記接着剤を加熱して当該接着剤を硬化させる接着剤硬化工程を備え、該接着剤硬化工程において、上記木製部材の内部温度が100℃を超えないように上記高周波電力の印加を調整することを特徴とする木製部材内への補強筋埋設方法。 A method of burying a reinforcing bar in a wooden member, which is a hole drilling step of piercing a hole for burying a reinforcing bar in the wooden member and a reinforcing bar inserting step of inserting the reinforcing bar into the hole for burying the reinforcing bar. An adhesive filling step of filling the reinforcing bar burying hole with an epoxy adhesive, and a pair of electrodes arranged along the longitudinal direction of the reinforcing bar burying hole and sandwiching the wooden member are arranged. The wooden member is heated by the application step of applying high frequency power to the member and the dielectric heating by the application, and the adhesive in the wooden member is heated by the heat conduction heating from the heated wooden member . A wooden member comprising an adhesive curing step for curing the adhesive, and adjusting the application of the high frequency power so that the internal temperature of the wooden member does not exceed 100 ° C. in the adhesive curing step. How to bury reinforcements inside. 上記補強筋は金属製又は繊維強化プラスチック製の棒状体であることを特徴とする請求項1に記載の木製部材内への補強筋埋設方法。 The method for embedding reinforcing bars in a wooden member according to claim 1, wherein the reinforcing bars are rod-shaped bodies made of metal or fiber reinforced plastic. 上記接着剤は、二液硬化型のエポキシ系接着剤であることを特徴とする請求項1又は請求項2に記載の木製部材内への補強筋埋設方法。 The method for embedding reinforcing bars in a wooden member according to claim 1 or 2, wherein the adhesive is a two-component curable epoxy adhesive. 上記印加工程及び上記接着剤硬化工程は、電源側電極とアース側電極を入れ替えて、複数回行うことを特徴とする請求項1乃至請求項3の何れかに記載の木製部材内への補強筋埋設方法。 The reinforcing bar in the wooden member according to any one of claims 1 to 3, wherein the application step and the adhesive curing step are performed a plurality of times by exchanging the power supply side electrode and the ground side electrode. Burial method.
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