JP2021017743A - Joint structure of component, joint method, temporary structure, and assembly/demolition method of temporary structure - Google Patents
Joint structure of component, joint method, temporary structure, and assembly/demolition method of temporary structure Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000000853 adhesive Substances 0.000 claims abstract description 45
- 230000001070 adhesive effect Effects 0.000 claims abstract description 45
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 18
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 18
- 229920005992 thermoplastic resin Polymers 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 description 13
- 238000005452 bending Methods 0.000 description 12
- 230000002093 peripheral effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000013001 point bending Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Mutual Connection Of Rods And Tubes (AREA)
- Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)
Abstract
Description
本発明は、例えば仮設構造物などを構成する部材の接合構造、接合方法、仮設構造物および仮設構造物の組立解体方法に関するものである。 The present invention relates to, for example, a joining structure of members constituting a temporary structure, a joining method, a temporary structure, and a method of assembling and disassembling the temporary structure.
従来、建築工事現場において使用される仮設構造物として、鋼製単管パイプなどの部材を金具等で組み立てた枠組足場などが知られている（例えば、特許文献１、２を参照）。部材の接合には、組立・解体の効率を優先して乾式のボルトやピンによる接合が利用されている。この接合は、せん断力についてはボルトやピンの支圧力に期待する接合となるため、素材の加工や組み立ての精度に起因するガタや遊びが生じるおそれがある。仮設構造物全体としては、それらが積み重なって想定外の撓みや変形を生じさせ、しばしば施工スケジュールに遅延させる原因にもなっている。 Conventionally, as a temporary structure used at a construction site, a frame scaffold in which a member such as a steel single pipe is assembled with metal fittings or the like is known (see, for example, Patent Documents 1 and 2). For joining members, dry bolts and pins are used to give priority to the efficiency of assembly and disassembly. Since this joint is a joint that is expected to support the bearing pressure of bolts and pins in terms of shearing force, there is a risk of play or play due to the accuracy of material processing and assembly. As a whole, the temporary structures are piled up to cause unexpected bending and deformation, which often delays the construction schedule.
このため、単管パイプなどの部材の接合部分において、ガタをなくすことが求められていた。 Therefore, it has been required to eliminate backlash at the joint portion of a member such as a single pipe.
本発明は、上記に鑑みてなされたものであって、ガタのない部材の接合構造、接合方法、仮設構造物および仮設構造物の組立解体方法を提供することを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide a joining structure of members without play, a joining method, a temporary structure, and a method of assembling and disassembling the temporary structure.
上記した課題を解決し、目的を達成するために、本発明に係る部材の接合構造は、部材どうしを接合する構造であって、双方の部材の端部に係合配置され、双方の部材を繋ぐジョイント部品と、ジョイント部品と部材の端部との間の隙間に設けられ、ジョイント部品と部材を接着する熱可塑性の接着材とを備えることを特徴とする。 In order to solve the above-mentioned problems and achieve the object, the joining structure of the members according to the present invention is a structure for joining the members, and both members are engaged and arranged at the ends of both members. It is characterized by being provided in a gap between the joint component to be connected and the end portion of the joint component and the member, and provided with a thermoplastic adhesive material for adhering the joint component and the member.
また、本発明に係る他の部材の接合構造は、上述した発明において、接着材は、シート状の熱可塑性樹脂であることを特徴とする。 Further, the bonding structure of other members according to the present invention is characterized in that, in the above-mentioned invention, the adhesive material is a sheet-shaped thermoplastic resin.
また、本発明に係る部材の接合方法は、部材どうしを接合する方法であって、双方の部材の端部にジョイント部品を係合配置して、双方の部材を繋ぐステップと、ジョイント部品と部材の端部との間の隙間に熱可塑性の接着材を設けるステップと、隙間に設けた熱可塑性の接着材を加熱して、ジョイント部品と部材を接着するステップとを備えることを特徴とする。 Further, the method of joining members according to the present invention is a method of joining members to each other, in which a step of engaging and arranging joint parts at the ends of both members and connecting both members, and joint parts and members. It is characterized by including a step of providing a thermoplastic adhesive in a gap between the ends and a step of heating the thermoplastic adhesive provided in the gap to bond the joint parts to the members.
また、本発明に係る他の部材の接合方法は、上述した発明において、接着材は、シート状の熱可塑性樹脂であることを特徴とする。 Further, the method for joining other members according to the present invention is characterized in that, in the above-mentioned invention, the adhesive is a sheet-shaped thermoplastic resin.
また、本発明に係る仮設構造物は、上述した部材の接合構造を備えることを特徴とする。 Further, the temporary structure according to the present invention is characterized by having the above-mentioned joint structure of members.
また、本発明に係る仮設構造物の組立解体方法は、上述した仮設構造物を組立または解体する方法であって、組立時に、上述した部材の接合方法で部材どうしを接合するステップと、解体時に、隙間に設けた熱可塑性の接着材を加熱することによってジョイント部品と部材とを分離するステップの少なくとも一方を備えることを特徴とする。 Further, the method of assembling and disassembling the temporary structure according to the present invention is a method of assembling or disassembling the above-mentioned temporary structure, and at the time of assembly, a step of joining members by the above-mentioned joining method of members and at the time of disassembly. It is characterized by comprising at least one step of separating the joint component and the member by heating the thermoplastic adhesive provided in the gap.
本発明に係る部材の接合構造によれば、部材どうしを接合する構造であって、双方の部材の端部に係合配置され、双方の部材を繋ぐジョイント部品と、ジョイント部品と部材の端部との間の隙間に設けられ、ジョイント部品と部材を接着する熱可塑性の接着材とを備えるので、ガタのない部材の接合構造を提供することができるという効果を奏する。 According to the joining structure of the members according to the present invention, the members are joined to each other, and the joint parts are engaged and arranged at the ends of both members to connect the two members, and the joint parts and the ends of the members. Since it is provided in the gap between the joint parts and the thermoplastic adhesive material for adhering the joint parts and the members, it is possible to provide a joint structure of the members without backlash.
また、本発明に係る他の部材の接合構造によれば、接着材は、シート状の熱可塑性樹脂であるので、接着材をジョイント部品と部材の間の隙間に容易に設けることができるという効果を奏する。 Further, according to the joining structure of other members according to the present invention, since the adhesive is a sheet-shaped thermoplastic resin, the effect is that the adhesive can be easily provided in the gap between the joint parts and the members. Play.
また、本発明に係る部材の接合方法によれば、部材どうしを接合する方法であって、双方の部材の端部にジョイント部品を係合配置して、双方の部材を繋ぐステップと、ジョイント部品と部材の端部との間の隙間に熱可塑性の接着材を設けるステップと、隙間に設けた熱可塑性の接着材を加熱して、ジョイント部品と部材を接着するステップとを備えるので、ガタのない部材の接合方法を提供することができるという効果を奏する。 Further, according to the method of joining members according to the present invention, there is a method of joining members to each other, in which a step of engaging and arranging joint parts at the ends of both members to connect both members and a joint part. A step of providing a thermoplastic adhesive in the gap between the member and the end of the member and a step of heating the thermoplastic adhesive provided in the gap to bond the joint part and the member are provided. It has the effect of being able to provide a method of joining non-members.
また、本発明に係る他の部材の接合方法によれば、接着材は、シート状の熱可塑性樹脂であるので、接着材をジョイント部品と部材の間の隙間に容易に設けることができるという効果を奏する。 Further, according to the method of joining other members according to the present invention, since the adhesive is a sheet-shaped thermoplastic resin, the effect is that the adhesive can be easily provided in the gap between the joint parts and the members. Play.
また、本発明に係る仮設構造物によれば、上述した部材の接合構造を備えるので、ガタによる想定外の撓みや変形を抑制した仮設構造物を提供することができるという効果を奏する。 Further, according to the temporary structure according to the present invention, since the temporary structure having the above-mentioned member is provided, it is possible to provide a temporary structure in which unexpected bending and deformation due to backlash are suppressed.
また、本発明に係る仮設構造物の組立解体方法によれば、上述した仮設構造物を組立または解体する方法であって、組立時に、上述した部材の接合方法で部材どうしを接合するステップと、解体時に、隙間に設けた熱可塑性の接着材を加熱することによってジョイント部品と部材とを分離するステップの少なくとも一方を備えるので、仮設構造物の組立や解体を容易かつ迅速に行うことができるという効果を奏する。 Further, according to the method of assembling and disassembling a temporary structure according to the present invention, there is a method of assembling or disassembling the temporary structure described above, and at the time of assembly, a step of joining the members by the method of joining the members described above and At the time of dismantling, at least one of the steps of separating the joint parts and the members by heating the thermoplastic adhesive provided in the gap is provided, so that the temporary structure can be assembled and disassembled easily and quickly. It works.
以下に、本発明に係る部材の接合構造、接合方法、仮設構造物および仮設構造物の組立解体方法の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, embodiments of a joining structure, a joining method, a temporary structure, and a method for assembling and disassembling the temporary structure according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.
図１（４）に示すように、本発明の実施の形態に係る部材の接合構造は、鋼製の単管パイプ１２、１２（部材）どうしを直列に接合する構造であって、双方の単管パイプ１２、１２の端部に内挿配置され、双方を繋ぐ鋼製の直線ジョイント１４（ジョイント部品）と、直線ジョイント１４の外周と単管パイプ１２の端部の内周との間の隙間に設けられ、直線ジョイント１４と単管パイプ１２を接着する熱可塑性の接着材１６とを備える。 As shown in FIG. 1 (4), the joining structure of the members according to the embodiment of the present invention is a structure in which the steel single pipes 12 and 12 (members) are joined in series, and both are single. A gap between the steel straight joint 14 (joint part) that is inserted and placed at the ends of the pipes 12 and 12 and connects the two, and the outer circumference of the straight joint 14 and the inner circumference of the end of the single pipe 12. A thermoplastic adhesive 16 for adhering a straight joint 14 and a single pipe 12 is provided in the above.
図１（１）に示すように、直線ジョイント１４は、中央の環状の大径部１８と両側の小径部２０とを同心状に一体的に連結した円筒状部材からなる。小径部２０は、大径部１８の両側に延びており、その開口端には一対のＬ形溝２２が形成される。図１（２）に示すように、小径部２０は、単管パイプ１２の開口端に挿入可能である。 As shown in FIG. 1 (1), the linear joint 14 is composed of a cylindrical member in which a central annular large diameter portion 18 and both side small diameter portions 20 are concentrically and integrally connected. The small diameter portion 20 extends on both sides of the large diameter portion 18, and a pair of L-shaped grooves 22 are formed at the open ends thereof. As shown in FIG. 1 (2), the small diameter portion 20 can be inserted into the open end of the single pipe pipe 12.
接着材１６は、熱可塑性樹脂をシート状に成形したものであり、あらかじめ直線ジョイント１４の小径部２０の外周面に巻き付け配置される。接着材１６をシート状にしてあらかじめ直線ジョイント１４に装着しておくことで、接着材１６を直線ジョイント１４と単管パイプ１２の間の隙間に容易に挟み込ませることができる。本実施の形態の接着材１６は、Ｌ形溝２２の部分を含む開口端側には配置されないが、Ｌ形溝２２の部分を除いた開口端側に配置してもよい。接着材１６には、例えば、常温では固体で加熱溶融することにより液状化して被着体に塗布し、冷却固化によって接合を形成するホットメルト接着材を用いてもよい。また、自動車内装材や家電部材の接着などに利用されるポリオレフィン系の熱可塑性樹脂などを用いてもよい。接着材１６は、シート状に限るものではなく、直線ジョイント１４と単管パイプ１２の間の隙間に充填できる態様のものであればいかなるものでもよいが、作業性を向上する観点でシート状のものが好ましい。 The adhesive 16 is formed by molding a thermoplastic resin into a sheet, and is previously wound around the outer peripheral surface of the small diameter portion 20 of the linear joint 14 and arranged. By forming the adhesive 16 into a sheet and attaching it to the straight joint 14 in advance, the adhesive 16 can be easily sandwiched in the gap between the straight joint 14 and the single pipe 12. The adhesive 16 of the present embodiment is not arranged on the opening end side including the portion of the L-shaped groove 22, but may be arranged on the opening end side excluding the portion of the L-shaped groove 22. As the adhesive material 16, for example, a hot melt adhesive material which is solid at room temperature to be liquefied by heating and melting to be applied to an adherend and to form a bond by cooling solidification may be used. Further, a polyolefin-based thermoplastic resin used for adhering automobile interior materials and home appliance members may be used. The adhesive material 16 is not limited to the sheet shape, and may be any shape as long as it can be filled in the gap between the straight joint 14 and the single pipe pipe 12, but the adhesive material 16 is in the sheet shape from the viewpoint of improving workability. Those are preferable.
図１（２）に示すように、単管パイプ１２には、単管パイプ１２を直径方向に貫通する係止ピン２４が固定されている。このピン２４は廻り止め用であり、直線ジョイント１４のＬ形溝２２に係止可能である。 As shown in FIG. 1 (2), a locking pin 24 that penetrates the single pipe 12 in the radial direction is fixed to the single pipe 12. The pin 24 is for preventing rotation and can be locked in the L-shaped groove 22 of the straight joint 14.
次に、本実施の形態に係る部材の接合方法について説明する。
まず、直線ジョイント１４の両側の小径部２０にシート状の接着材１６を巻き付けておく。次に、直線ジョイント１４の一方の小径部２０を単管パイプ１２の開口端に挿入する。続いて、ピン２４をＬ形溝２２に挿入した状態で直線ジョイント１４を矢印方向に回転させると、ピン２４はＬ形溝２２に係止し、図１（３）に示すように、直線ジョイント１４は単管パイプ１２に接続されロックされる。これにより、シート状の接着材１６が、小径部２０の外周面と単管パイプ１２の内周面の間の隙間に配置される。次に、図１（４）に示すように、反対側の小径部２０を単管パイプ１２の開口端に挿入してピン２４をＬ形溝２２に挿入し、単管パイプ１２を矢印方向に回転させると、ピン２４とＬ形溝２２を介して直線ジョイント１４が単管パイプ１２に接続されロックされる。これにより、シート状の接着材１６が、小径部２０の外周面と単管パイプ１２の内周面の間の隙間に配置される。
Next, a method of joining the members according to the present embodiment will be described.
First, the sheet-shaped adhesive 16 is wound around the small diameter portions 20 on both sides of the straight joint 14. Next, one small diameter portion 20 of the straight joint 14 is inserted into the open end of the single pipe pipe 12. Subsequently, when the straight joint 14 is rotated in the direction of the arrow with the pin 24 inserted in the L-shaped groove 22, the pin 24 is locked in the L-shaped groove 22, and as shown in FIG. 1 (3), the straight joint 14 is engaged. 14 is connected to and locked to the single pipe 12. As a result, the sheet-shaped adhesive 16 is arranged in the gap between the outer peripheral surface of the small diameter portion 20 and the inner peripheral surface of the single pipe 12. Next, as shown in FIG. 1 (4), the small diameter portion 20 on the opposite side is inserted into the opening end of the single pipe pipe 12, the pin 24 is inserted into the L-shaped groove 22, and the single pipe pipe 12 is inserted in the direction of the arrow. When rotated, the straight joint 14 is connected to and locked to the single pipe 12 via the pin 24 and the L-shaped groove 22. As a result, the sheet-shaped adhesive 16 is arranged in the gap between the outer peripheral surface of the small diameter portion 20 and the inner peripheral surface of the single pipe 12.
続いて、直線ジョイント１４の部分を接着材１６の熱可塑性樹脂の軟化点以上に加熱することで、樹脂をなじませる。樹脂が隙間の形状に応じてなじむことで、単管パイプ１２の内周面と直線ジョイント１４の外周面が接着され、かつ両者の隙間が樹脂で埋まり、ガタのない単管パイプ１２の接合構造が得られる。このようにして、単管パイプ１２および直線ジョイント１４を順次連結することにより、多数の単管パイプ１２を直列に連結することができる。これにより、足場の全長に亘って延びる水平な手摺等を有する単管足場などの仮設構造物を組み立てることができる。 Subsequently, the portion of the straight joint 14 is heated above the softening point of the thermoplastic resin of the adhesive 16 to allow the resin to blend in. As the resin fits according to the shape of the gap, the inner peripheral surface of the single pipe 12 and the outer peripheral surface of the straight joint 14 are adhered, and the gap between the two is filled with the resin, so that the single pipe 12 has a joint structure without play. Is obtained. In this way, by sequentially connecting the single pipes 12 and the straight joints 14, a large number of single pipes 12 can be connected in series. This makes it possible to assemble a temporary structure such as a single-tube scaffold having a horizontal handrail or the like extending over the entire length of the scaffold.
本実施の形態の接合構造はガタがないので、この接合構造を用いて組み立てた単管足場などの仮設構造物の想定外の撓みや変形を低減することができる。また、仮設構造物の解体時に、直線ジョイント１４の部分を加熱することで、接着材１６の熱可塑性によって単管パイプ１２の内周面と直線ジョイント１４の外周面の接着力が弱まる。これにより、接着した直線ジョイント１４と単管パイプ１２とを容易かつ迅速に分離することができる。したがって、本実施の形態の接合構造を用いた仮設構造物は、組立や解体を容易かつ迅速に行うことができる。分離した直線ジョイント１４や単管パイプ１２は再利用可能である。 Since the joint structure of the present embodiment has no backlash, it is possible to reduce unexpected bending and deformation of a temporary structure such as a single-tube scaffold assembled using this joint structure. Further, by heating the portion of the straight joint 14 at the time of disassembling the temporary structure, the adhesive force between the inner peripheral surface of the single pipe 12 and the outer peripheral surface of the straight joint 14 is weakened by the thermoplasticity of the adhesive material 16. As a result, the bonded straight joint 14 and the single pipe 12 can be easily and quickly separated. Therefore, the temporary structure using the joint structure of the present embodiment can be easily and quickly assembled and disassembled. The separated straight joint 14 and single pipe 12 can be reused.
（本発明の効果の検証）
本発明の効果を検証するために、単管パイプ（直径φ４８．３ｍｍ、厚さ２．４ｍｍ、長さ３００ｍｍ）２本を市販の直線ジョイントで接合し、４点曲げ試験を行った。図２（１）に直線ジョイントの寸法を、（２）、（３）に試験体の形成手順を、（４）に試験装置を示す。
(Verification of the effect of the present invention)
In order to verify the effect of the present invention, two single pipes (diameter φ48.3 mm, thickness 2.4 mm, length 300 mm) were joined with a commercially available straight joint, and a four-point bending test was performed. FIG. 2 (1) shows the dimensions of the linear joint, (2) and (3) show the procedure for forming the test piece, and (4) shows the test device.
本発明の実施例の直線ジョイントでは、直線ジョイントの内挿される部分（φ４１．９ｍｍ）に対してシート状に成形した熱可塑性樹脂（ポリオレフィン系ホットメルト接着剤「エバーグリップ（登録商標）ＡＳ８５２」、東亞合成株式会社製）を６０ｍｍ幅で巻き付け、やや力をかけて押し込むような状況で単管パイプに内挿した。直線ジョイントが内挿されている部分を１８００Ｗの工業用ドライヤーで満遍なく加熱したところ、約５分後に直線ジョイントと単管パイプ端部の隙間より軟化した熱可塑性樹脂の滲み出しが確認できたので、さらに３分全体を加熱した後、室温で冷却した。温度が下がり樹脂が硬化した後の直線ジョイントには遊びやガタは確認できなかった。 In the linear joint of the embodiment of the present invention, a thermoplastic resin (polyolefin-based hot melt adhesive "Evergrip (registered trademark) AS852") formed into a sheet with respect to the portion (φ41.9 mm) inserted in the linear joint, It was wound with a width of 60 mm (manufactured by Toagosei Co., Ltd.) and inserted into a single pipe in a situation where it was pushed in with a slight force. When the part where the straight joint was inserted was heated evenly with a 1800 W industrial dryer, it was confirmed that the thermoplastic resin softened from the gap between the straight joint and the end of the single pipe pipe exuded after about 5 minutes. The whole was heated for another 3 minutes and then cooled at room temperature. No play or play was observed in the straight joint after the temperature dropped and the resin was cured.
４点曲げ試験は、図２（４）、図３に示すように、支持点間距離が５００ｍｍ、加力点間距離が３００ｍｍの条件下で実施した。試験体数は、熱可塑性樹脂を用いたものが２体（実施例１、２）と、比較用として熱可塑性樹脂を用いないもの（比較例１）と、直線ジョイントのない単管パイプ（比較例２）がそれぞれ１体である。なお、ジョイント部分は純曲げ区間に配置した。 As shown in FIGS. 2 (4) and 3, the 4-point bending test was carried out under the conditions that the distance between the supporting points was 500 mm and the distance between the applying points was 300 mm. The number of test pieces was two using thermoplastic resin (Examples 1 and 2), one without thermoplastic resin for comparison (Comparative Example 1), and a single pipe without a straight joint (comparison). Example 2) is one body each. The joint portion was arranged in the pure bending section.
曲げ載荷荷重と加力点の変位の平均値の関係を図４に示す。単管パイプが曲げ降伏する荷重（３５．９ｋＮ）時の変位は、単管パイプ（比較例２）が９．６ｍｍ、熱可塑性樹脂で接着した直線ジョイント（実施例１、２）が１１．４ｍｍと１１．２ｍｍ、乾式の直線ジョイント（比較例１）が１４．０ｍｍであった。実施例１、２の熱可塑性樹脂を用いた直線ジョイントは、単管パイプが曲げ降伏する程度までの応力範囲では直線ジョイントの撓みを抑制する効果があることが確認された。 FIG. 4 shows the relationship between the bending load and the average value of the displacement of the force point. The displacement of the single pipe under a load (35.9 kN) that bends and yields is 9.6 mm for the single pipe (Comparative Example 2) and 11.4 mm for the straight joint (Examples 1 and 2) bonded with a thermoplastic resin. And 11.2 mm, and the dry straight joint (Comparative Example 1) was 14.0 mm. It was confirmed that the linear joints using the thermoplastic resins of Examples 1 and 2 have an effect of suppressing the bending of the linear joint in the stress range up to the extent that the single pipe bends and yields.
４点曲げ試験後の試験体（実施例１、２）の片方を万力でつかみ、ジョイント部を工業用ドライヤーで加熱しながら力を加えた。加熱開始後約３分で単管パイプが周方向に動くようになり、５分後には直線ジョイントから外すことができた。外した後の状況を図５に示す。 One of the test pieces (Examples 1 and 2) after the 4-point bending test was grasped with a vise, and the force was applied while heating the joint portion with an industrial dryer. About 3 minutes after the start of heating, the single pipe started to move in the circumferential direction, and 5 minutes later, it could be removed from the straight joint. The situation after the removal is shown in FIG.
なお、上記の試験に用いた熱可塑性樹脂（ＡＳ８５２）は、軟化点が１５０℃、ホットメルトとしての使用温度が２００℃〜２２０℃という耐熱型の樹脂であり、自動車内装材や家電部材の接着に広く利用されている。様々な素材に対して良好な接着性を示すのはポリオレフィン系の樹脂であり、一般的な仕様ではＡＳ８５２よりも軟化点が低め（１００℃超程度、使用温度１５０℃〜１８０℃）のものもある。耐熱性を要求されないような部位ではさらに良好な接着接合性、分離性が期待できることから、単管足場などの仮設構造物に含まれる単管パイプ接合用の接着材としては、こうした樹脂を用いてもよい。 The thermoplastic resin (AS852) used in the above test is a heat-resistant resin having a softening point of 150 ° C. and a hot melt operating temperature of 200 ° C. to 220 ° C., and is used for adhesion of automobile interior materials and home appliance members. Widely used in. Polyolefin-based resins show good adhesiveness to various materials, and in general specifications, some have a lower softening point than AS852 (over 100 ° C, operating temperature 150 ° C to 180 ° C). is there. Since better adhesive bonding and separability can be expected in parts where heat resistance is not required, such a resin is used as an adhesive for joining single pipes contained in temporary structures such as single pipe scaffolds. May be good.
また、シート状の熱可塑性樹脂の幅を６０ｍｍ以上とすることで、母材（単管パイプ）の曲げ降伏強度以上の直線ジョイントの曲げ強度を発揮することができる。試験を行った単管パイプの直線ジョイントでは、母材（単管パイプ）が曲げ降伏する程度の応力範囲においても、ガタが生じず、応力伝達がスムーズに行え、継手の剛性が向上した。接着されたジョイントを再加熱すれば分離させることができ、仮設部材の「解体性の良さ」を大きく損なわない。また、分離された部材の再利用が可能である。 Further, by setting the width of the sheet-shaped thermoplastic resin to 60 mm or more, it is possible to exhibit the bending strength of the straight joint which is equal to or higher than the bending yield strength of the base material (single pipe). In the straight joint of the single pipe that was tested, no backlash occurred, stress transmission was performed smoothly, and the rigidity of the joint was improved even in the stress range where the base metal (single pipe) bent and yielded. The bonded joint can be separated by reheating, and the "good dismantability" of the temporary member is not significantly impaired. In addition, the separated members can be reused.
以上説明したように、本発明に係る部材の接合構造によれば、部材どうしを接合する構造であって、双方の部材の端部に係合配置され、双方の部材を繋ぐジョイント部品と、ジョイント部品と部材の端部との間の隙間に設けられ、ジョイント部品と部材を接着する熱可塑性の接着材とを備えるので、ガタのない部材の接合構造を提供することができる。 As described above, according to the joining structure of the members according to the present invention, there is a structure in which the members are joined to each other, and a joint component that is engaged and arranged at the ends of both members and connects both members and a joint. Since it is provided in the gap between the part and the end portion of the member and includes a thermoplastic adhesive for adhering the joint part and the member, it is possible to provide a joint structure of the member without play.
また、本発明に係る他の部材の接合構造によれば、接着材は、シート状の熱可塑性樹脂であるので、接着材をジョイント部品と部材の間の隙間に容易に設けることができる。 Further, according to the joining structure of other members according to the present invention, since the adhesive is a sheet-shaped thermoplastic resin, the adhesive can be easily provided in the gap between the joint component and the member.
また、本発明に係る部材の接合方法によれば、部材どうしを接合する方法であって、双方の部材の端部にジョイント部品を係合配置して、双方の部材を繋ぐステップと、ジョイント部品と部材の端部との間の隙間に熱可塑性の接着材を設けるステップと、隙間に設けた熱可塑性の接着材を加熱して、ジョイント部品と部材を接着するステップとを備えるので、ガタのない部材の接合方法を提供することができる。 Further, according to the method of joining members according to the present invention, there is a method of joining members to each other, in which a step of engaging and arranging joint parts at the ends of both members to connect both members and a joint part. A step of providing a thermoplastic adhesive in the gap between the member and the end of the member and a step of heating the thermoplastic adhesive provided in the gap to bond the joint part and the member are provided. A method of joining non-members can be provided.
また、本発明に係る他の部材の接合方法によれば、接着材は、シート状の熱可塑性樹脂であるので、接着材をジョイント部品と部材の間の隙間に容易に設けることができる。 Further, according to the method of joining other members according to the present invention, since the adhesive is a sheet-shaped thermoplastic resin, the adhesive can be easily provided in the gap between the joint component and the member.
また、本発明に係る仮設構造物によれば、上述した部材の接合構造を備えるので、ガタによる想定外の撓みや変形を抑制した仮設構造物を提供することができる。 Further, according to the temporary structure according to the present invention, since the joint structure of the above-mentioned members is provided, it is possible to provide a temporary structure in which unexpected bending and deformation due to backlash are suppressed.
また、本発明に係る仮設構造物の組立解体方法によれば、上述した仮設構造物を組立または解体する方法であって、組立時に、上述した部材の接合方法で部材どうしを接合するステップと、解体時に、隙間に設けた熱可塑性の接着材を加熱することによってジョイント部品と部材とを分離するステップの少なくとも一方を備えるので、仮設構造物の組立や解体を容易かつ迅速に行うことができる。 Further, according to the method of assembling and disassembling a temporary structure according to the present invention, there is a method of assembling or disassembling the temporary structure described above, and at the time of assembly, a step of joining the members by the method of joining the members described above and At the time of dismantling, at least one of the steps of separating the joint parts and the members by heating the thermoplastic adhesive provided in the gap is provided, so that the temporary structure can be easily and quickly assembled and disassembled.
以上のように、本発明に係る部材の接合構造、接合方法、仮設構造物および仮設構造物の組立解体方法は、建築工事現場などで用いられる単管パイプによる枠組足場などの仮設構造物に有用であり、特に、仮設構造物に生じる想定外のガタや変形を減らすのに適している。 As described above, the joining structure and joining method of the members, and the method of assembling and disassembling the temporary structure and the temporary structure according to the present invention are useful for temporary structures such as frame scaffolds using single pipes used at construction sites and the like. In particular, it is suitable for reducing unexpected backlash and deformation that occur in temporary structures.
１２ 単管パイプ（部材）
１４ 直線ジョイント（ジョイント部品）
１６ 接着材
１８ 大径部
２０ 小径部
２２ Ｌ形溝
２４ ピン
12 Single pipe (member)
14 Straight joint (joint parts)
16 Adhesive 18 Large diameter part 20 Small diameter part 22 L-shaped groove 24 pins
Claims (6)
双方の部材の端部に係合配置され、双方の部材を繋ぐジョイント部品と、ジョイント部品と部材の端部との間の隙間に設けられ、ジョイント部品と部材を接着する熱可塑性の接着材とを備えることを特徴とする部材の接合構造。 It is a structure that joins members together,
A thermoplastic adhesive that is engaged and arranged at the ends of both members and is provided in the gap between the joint component and the end of the member to bond the joint component and the member. A joint structure of members, characterized in that.
双方の部材の端部にジョイント部品を係合配置して、双方の部材を繋ぐステップと、ジョイント部品と部材の端部との間の隙間に熱可塑性の接着材を設けるステップと、隙間に設けた熱可塑性の接着材を加熱して、ジョイント部品と部材を接着するステップとを備えることを特徴とする部材の接合方法。 It is a method of joining members together.
A step of engaging and arranging joint parts at the ends of both members to connect both members, a step of providing a thermoplastic adhesive in the gap between the joint part and the end of the member, and a step of providing the gap. A method for joining members, which comprises a step of heating a thermoplastic adhesive to bond the joint parts to the members.
組立時に、請求項３または４に記載の部材の接合方法で部材どうしを接合するステップと、解体時に、隙間に設けた熱可塑性の接着材を加熱することによってジョイント部品と部材とを分離するステップの少なくとも一方を備えることを特徴とする仮設構造物の組立解体方法。 A method of assembling or disassembling the temporary structure according to claim 5.
A step of joining members by the method of joining members according to claim 3 or 4 at the time of assembly, and a step of separating the joint parts and members by heating a thermoplastic adhesive provided in a gap at the time of disassembly. A method for assembling and disassembling a temporary structure, which comprises at least one of the above.
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|---|---|---|---|---|
| JPS4818135Y1 (en) * | 1971-05-06 | 1973-05-24 | ||
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| JP2002098114A (en) * | 2000-09-21 | 2002-04-05 | Matsushita Electric Ind Co Ltd | Cylindrical combined body and connecting device |
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