JP4067257B2

JP4067257B2 - Pipe connection structure

Info

Publication number: JP4067257B2
Application number: JP36341299A
Authority: JP
Inventors: 宏俊田原
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 1999-12-21
Filing date: 1999-12-21
Publication date: 2008-03-26
Anticipated expiration: 2019-12-21
Also published as: JP2001173618A

Description

【０００１】
【産業上の利用分野】
本発明は、一対の円筒状パイプを軸方向に連結一体化するためのパイプの連結構造及び該連結構造に用いるスリーブ部材、及び掃除具に関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
例えば図５に示す掃除具５０の柄や、杖の柄等の長尺のロッド状部材５１は、所定の長さの複数の円筒状パイプ５２を軸方向に連結一体化して形成される場合がある。円筒状パイプ５２を連結一体化するための連結部５３の構造としては、例えば連結すべき一対の円筒状パイプ５２，５２の各端部の開口に、内周面に雌ねじを有する雌ねじ体を各々取り付け、これらの一対の雌ねじ体を対向配置し、外周面に雄ねじを備えた雄ねじ体を対向配置した双方の雌ねじ体に螺合することによって、一対の円筒状パイプ５２，５２を接合一体化する構造が知られている。
【０００３】
上記従来の連結部５３の構造によれば、雌ねじ体と雄ネジ体の螺合に加えて、対向して当接する雌ねじ体の端面同士の摩擦力によって雌ねじ体のゆるみを抑えるように構成されたものである。したがって、連結部５３に曲げ応力が加わると当接する端面間に隙間が生じて摩擦力が得られなくなり、雌ねじ体と雄ネジ体の螺合が緩みやすくなると共に、連結部５３が折れ曲がって破損しやすくなる。また、上記従来の連結部５３の構造によれば、その構造が複雑である。
【０００４】
本発明は、連結部に曲げ応力が加わっても当該連結部に緩みや破損が生じるのを効果的に防止できると共に、簡易な構造によって一対の円筒状パイプを軸方向に容易に連結一体化することのできるパイプの連結構造及び該連結構造に用いるスリーブ部材、及び掃除具の提供を目的とする。
【０００５】
【課題を解決するための手段】
本発明は、一方の円筒状パイプの縮径した端部を他方の円筒状パイプの端部の開口に挿入して連結部とし、該連結部を覆って配置されるスリーブ部材を用いて一対の前記円筒状パイプを軸方向に連結一体化する連結構造であって、前記連結部を構成する一対の円筒状パイプの各端部には突起挿入穴を各々形成し、前記スリーブ部材は、径方向外方に変形して径方向内方に付勢力を生じる弾性部を備えると共に、内側に突出形成された係合突起を備えており、前記一方の円筒状パイプの縮径した端部には、これの端縁部から前記突起挿入穴に至る突起スライド案内溝が、該円筒状パイプの軸方向に形成されており、前記係合突起には、前記他方の円筒状パイプの端縁部側に斜面が形成されており、前記係合突起を前記突起挿入穴に挿入して前記他方の円筒状パイプの内側面から突出させた状態とした後、前記一方の円筒状パイプの縮径した端部を、前記他方の円筒状パイプの端部の開口に挿入してゆく際に、前記係合突起は、前記斜面から前記スライド案内溝に乗り上げ、前記スライド案内溝を介して前記突起挿入穴に向けて移動して行き、前記連結部の外側から合致した突起挿入穴に挿入係止され、前記弾性部により押え付けて前記係合突起の係止状態を保持するパイプの連結構造を提供することにより、上記目的を達成したものである。
【０００６】
また、本発明は、前記パイプの連結構造に用いるスリーブ部材であって、前記連結部の周囲を密接状態で覆い得る内径を有する円柱形状のスリーブ本体の周面に所定の切り込みを設けることにより、径方向外方に変形して径方向内方に付勢力を生じる前記弾性部を形成し、且つ該弾性部の内側面から突出して前記係合突起が一体として設けられているスリーブ部材を提供することにより、上記目的を達成したものである。
【０００７】
上記記載におけるスリーブ本体の周面に設けた所定の切り込みとは、スリーブ本体の全部又は一部が径方向外方に弾性変形可能となるような形状又は位置に形成される切り込みを意味し、例えばスリーブ本体の軸方向全長に亘って切り込まれ、当該切り込みの間隔を周方向に拡げることによりスリーブ本体を拡径可能としてスリーブ本体の全体を弾性部とするものや、一方の短辺部分を残して長方形状に切り込まれ、当該一方の短辺部を基端部として他方の短辺部側を径方向外方に変形可能な弾性部とするもの等を挙げることができる。
【０００８】
さらに、本発明は、上記パイプの連結構造によって円筒状パイプを軸方向に連結一体化してなる柄を有する掃除具を提供することにより、上記目的を達成したものである。
【０００９】
【発明の実施の形態】
本発明の好ましい実施形態に係るパイプの連結構造は、例えば床面等の拭き掃除を行うための掃除用シート部材が取り付けられた掃除板と、この掃除板から立設して設けられた柄とからなる掃除具の、当該柄を複数の円筒状パイプを軸方向に連結一体化して設ける際に採用されたものである（図５参照）。すなわち、掃除具は、運搬や販売の便宜から掃除板や円筒状パイプ等の部品に各々に分解され、これらの部品を一まとめとした状態で製品化されており、使用時にはこれらを組み立てて使用する。
【００１０】
そして、本実施形態のパイプの連結構造１０は、複数の円筒状パイプからなる柄を構成する各一対の円筒状パイプの連結箇所において採用されるもので、図１及び図２に示すように、一方の円筒状パイプ１１の縮径した端部１３を他方の円筒状パイプ１２の端部１４の開口１５に挿入して連結部１６とし、この連結部１６を覆って配置されるスリーブ部材１７を用いて一対の円筒状パイプ１１，１２を軸方向に連結一体化するものである。
【００１１】
ここで、連結部１６を構成する円筒状パイプ１１，１２の各端部１３，１４には突起挿入穴１８，１９が各々形成されており、またスリーブ部材１７は、径方向外方に変形して径方向内方に付勢力を生じる弾性部２０を備えている。各端部１３，１４の突起挿入穴１８，１９を互いに合致させ、スリーブ部材１７に一体として設けられた係合突起２１を、連結部１６の外側から当該合致した突起挿入穴１８，１９に挿入係止し、弾性部２０により押え付けて、係合突起２１の係止状態を強固に保持する。また係合突起２１には、他方の円筒状パイプ１２の端縁部側に斜面が形成されている。
【００１２】
円筒状パイプ１１，１２は、各々、円筒状中空断面を有する金属製（アルミニウム製）のパイプ部材である。一方の円筒状パイプ１１の端部１３は縮径されており、この縮径された端部１３が、他方の円筒状パイプ１２の端部１４の開口１５に挿入されて、一方の円筒状パイプ１１の端部１３と他方の円筒状パイプ１２の端部１４とが密接状態で重なり合った二重構造の連結部１６が構成される。
【００１３】
また、一方の円筒状パイプ１１の端部１３は、その外周面が一旦急勾配で縮径した後、先端に向かって緩い勾配で徐々に縮径している。他方の円筒状パイプ１２の端部１４は、その内周面が、上記縮径された端部の勾配と合致する緩い勾配で先端に向かって拡径している。したがって、一方の円筒状パイプ１１の縮径部分を、その基端部分まで他方の円筒状パイプ１２の開口１５に挿入することにより、端部１３，２４を容易に密接状態とすることができる。
【００１４】
なお、一方の円筒状パイプ１１の縮径部分を、その基端部分まで他方の円筒状パイプ１２の開口１５に挿入した状態で、二重構造の連結部１６を適宜周方向にスライドすることによって、一方の円筒状パイプ１１の突起挿入穴１８を他方の円筒状パイプ１２の突起挿入穴１９に容易に合致させることができるような位置に、各突起挿入穴１８，１９が形成されている。
【００１５】
連結部１６を覆って配置されるスリーブ部材１７は、図３にも示すように、例えば合成樹脂（プラスチック）製の円筒状部材であるスリーブ本体２２の内側面に、円形の係合突起２１を一体として突出形成したものである。スリーブ部材１７には、スリーブ本体２２の軸方向全長に亘って第１切り込み２３が形成されていることにより、当該第１切り込み２３の間隔を周方向に拡げて、スリーブ本体２２を径方向外方に弾性変形させつつ拡径することができ、したがってスリーブ本体２２の全体が、径方向外方に変形して径方向内方に付勢力を生じる補助弾性部を構成する。
【００１６】
また、本実施形態によれば、スリーブ本体２２の周面における第１切り込み２３と略対向する位置に、縦長Ｕ字形状の第２切り込み２４が、スリーブ部材１７の軸方向に沿って形成されている。この第２切り込み２４によれば、一方の円筒状パイプ１１側に位置する切り込みの形成されていない部分を基端部２５として、縦長Ｕ字形状の先端部に位置する他方の円筒状パイプ１２側を持ち上げることにより、第２切り込み２４によって囲まれる部分を弾性部２０として、径方向外方に飛び込み板状に弾性変形させることができる。そして、スリーブ部材１７に一体として設けられた係合突起２１は、この弾性部２０の内側に突出形成されており、弾性部２０が外方に押し上げられると、径方向内方に付勢力が働いて係合突起２１を押し下げることができるようになっている。
【００１７】
なお、スリーブ本体２２の内側略中央部分には、これの内周面から突出してリング状の当接片２６が設けられており、連結部１６を覆ってスリーブ部材１７を装着する際に、他方の円筒状パイプ１２の端縁部をこの当接片２６に当接させて容易に位置決めできるようになっている。
【００１８】
さらに、本実施形態によれば、一方の円筒状パイプ１１の縮径した端部１３には、これの端縁部から突起挿入穴１８に至る突起スライド案内溝２７（図１参照）が、係合突起２１の直径に相当する幅を有する浅い凹状断面で、円筒状パイプの軸方向に形成されている。さらにまた、本実施形態によれば、他方の円筒状パイプ１２の端部１４に形成された突起挿入穴１９は、係合突起２１の円形形状と略合致する円形形状を備える一方で、一方の円筒状パイプ１１の端部に形成された突起挿入穴１８は、軸方向に対して斜めに延設された、係合突起２１の直径と略合致する幅の長円形状を備えている。
【００１９】
そして、本実施形態の連結構造１０は、スリーブ部材１７を用いた簡易な構造によって、一対の円筒状パイプ１１，１２を軸方向に容易に連結一体化することができる。すなわち、第１切り込み２３の間隔を拡げてスリーブ部材１７を必要に応じて適宜拡径させて、他方の円筒状パイプ１２の端部の外周面に密接状態で装着すると共に、係合突起２１を突起挿入穴１９に挿入して他方の円筒状パイプ１２の内側面から突出させた状態とした後、一方の円筒状パイプ１１の縮径した端部１３を、他方の円筒状パイプ１２の端部１４の開口１５に挿入してゆく。係合突起２１は、一方の円筒状パイプ１１の端部１３外周面と当接することにより一旦径方向外方に押し上げられるが、一方の円筒状パイプ１１の突起挿入穴１８が他方の円筒状パイプ１２の突起挿入穴１９に合致すると、弾性部２０及びスリーブ本体２２全体による補助弾性部の付勢力によって、係合突起２１は押し下げられ、連結部１６の外側から双方の突起挿入穴１８，１９に容易かつスムースに挿入係止される。また、係合突起２１は、弾性部２０によって覆われることにより押え付けられて、突起挿入穴１８，１９から脱落することなく、その係止状態を容易かつ確実に保持する。
【００２０】
また、本実施形態によれば、一方の円筒状パイプ１１の縮径した端部１３には、スライド案内溝２７が設けられているので、かかる装着作業中に、一方の円筒状パイプ１１の端縁部において係合突起２１をスライド案内溝２７に配置すれば、縮径した端部１３の開口１５への挿入に伴って、係合突起２１は斜面からスライド案内溝に乗り上げて、スライド案内溝２７に沿って突起挿入穴１８に向かって自動的かつスムースに移動して行くことになり、一方の円筒状パイプ１１を周方向にスライドすることなく一対の突起挿入穴１８，１９を容易に合致させることができる。
【００２１】
さらに、本実施形態によれば、一方の円筒状パイプ１１の端部１３に形成された突起挿入穴１８は、軸方向に対して斜めに延設された長円形状を備えているので、係合突起２１を突起挿入穴１８の他方の円筒状パイプ１２側に係止した後、一方の円筒状パイプ１１を他方の円筒状パイプ１２に対して図１のＸ方向に回転させれば、係合突起２１が突起挿入穴１８の斜めに形成された内壁面に当接し、これに沿って移動することにより、一方の円筒状パイプ１１は他方の円筒状パイプ１２に対して図１の軸方向Ｙにスライドし、連結部１６における一対の端部１３，１４を締め付けて、強固な連結構造１０とすることができる。
【００２２】
そして、本実施形態の連結構造１０によれば、連結部１６は、一方の円筒状パイプ１１の端部１３と他方の円筒状パイプ１２の端部１４とが相当の長さで（本実施形態では２５ｍｍ）密接配置された二重構造を備えているので、清掃具の使用時等において、連結部１６に大きな曲げ応力が加わっても、かかる二重構造のラップ部分で当該曲げ応力を十分に支持することができ、連結部１６に緩みや破損が生じるのを効果的に回避することができる。また、特に、円筒状パイプ１１，１２は、金属製のパイプ部材であるので、曲げ応力に対するさらに強固な支持力を発揮することができる。
【００２３】
すなわち、本実施形態によれば、連結部１６に曲げ応力が加わっても当該連結部１６に緩みや破損が生じるのを効果的に防止できると共に、簡易な構造によって一対の円筒状パイプ１１，１２を軸方向に容易に連結一体化することができる。
【００２４】
なお、本発明は上記実施形態に限定されることなく種々の変更が可能である。例えば、一方の円筒状パイプの突起挿入穴は、長円形状とすることなく他方の円筒状パイプの突起挿入穴と同じ形状としても良い。また、スリーブ本体の軸方向全長に亘って形成した切り込みと縦長Ｕ字形状に形成した切り込みとを併設する必要は必ずしも無く、いずれか一方の切り込みによって弾性部を形成することもできる。
【００２６】
さらに、本発明は、掃除具の柄に限定されることなく、複数の円筒状パイプを軸方向に連結一体化して形成される種々の長尺のロッド状部材における円筒状パイプの連結構造として採用することができる。
【００２７】
【発明の効果】
本発明のパイプの連結構造及び該連結構造に用いるスリーブ部材、及び清掃具によれば、連結部に曲げ応力が加わっても当該連結部に緩みや破損が生じるのを効果的に防止できると共に、簡易な構造によって一対の円筒状パイプを軸方向に容易に連結一体化することのできるパイプの連結構造を容易に構成することができる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係るパイプの連結構造を説明する分解斜視図である。
【図２】本発明の一実施形態に係るパイプの連結構造を示す、（ａ）は（ｂ）のＡ−Ａに沿った断面図、（ｂ）は（ａ）のＢ−Ｂに沿った断面図である。
【図３】本発明の一実施形態に係るスリーブ部材を説明する図２（ｂ）のＣ−Ｃに沿ったスリーブ部材のみの横断面図である。
【図４】従来のパイプの連結構造を備えた清掃具を示す斜視図である。
【符号の説明】
１０パイプの連結構造
１１，１２円筒状パイプ
１３端部（一方の円筒状パイプの縮径した端部）
１４端部（他方の円筒状パイプの端部）
１５開口
１６連結部
１７スリーブ部材
１８突起挿入穴
１９突起挿入穴
２０弾性部
２１係合突起
２２スリーブ本体
２３第１切り込み
２４第２切り込み
２７突起スライド案内溝[0001]
[Industrial application fields]
The present invention relates to a pipe connection structure for connecting and integrating a pair of cylindrical pipes in the axial direction, a sleeve member used in the connection structure, and a cleaning tool.
[0002]
[Prior art and problems to be solved by the invention]
For example, the long rod-shaped member 51 such as the handle of the cleaning tool 50 and the handle of the cane shown in FIG. 5 may be formed by connecting and integrating a plurality of cylindrical pipes 52 having a predetermined length in the axial direction. is there. As the structure of the connecting portion 53 for connecting and integrating the cylindrical pipe 52, for example, a female screw body having a female screw on the inner peripheral surface is provided at each end opening of a pair of cylindrical pipes 52, 52 to be connected. The pair of cylindrical pipes 52 and 52 are joined and integrated by mounting the pair of female screw bodies facing each other and screwing the male screw body provided with a male screw on the outer peripheral surface to both the female screw bodies arranged opposite to each other. The structure is known.
[0003]
According to the structure of the conventional connecting portion 53, in addition to the screwing of the female screw body and the male screw body, the looseness of the female screw body is suppressed by the frictional force between the end faces of the female screw bodies that face each other. Is. Therefore, when a bending stress is applied to the connecting portion 53, a gap is generated between the contacting end faces, and a frictional force cannot be obtained. It becomes easy. Further, according to the structure of the conventional connecting portion 53, the structure is complicated.
[0004]
The present invention can effectively prevent loosening and breakage of the connecting portion even when bending stress is applied to the connecting portion, and easily couple and integrate a pair of cylindrical pipes in the axial direction with a simple structure. An object of the present invention is to provide a pipe connection structure that can be used, a sleeve member used in the connection structure, and a cleaning tool.
[0005]
[Means for Solving the Problems]
In the present invention, a reduced diameter end portion of one cylindrical pipe is inserted into an opening of an end portion of the other cylindrical pipe to form a connecting portion, and a pair of sleeve members are used to cover the connecting portion. A connecting structure for connecting and integrating the cylindrical pipes in the axial direction, each of the ends of the pair of cylindrical pipes constituting the connecting part is formed with a protrusion insertion hole, and the sleeve member has a radial direction. It has an elastic part that deforms outward and generates an urging force radially inward, and has an engagement protrusion that protrudes inward. A protrusion slide guide groove extending from the end edge portion to the protrusion insertion hole is formed in the axial direction of the cylindrical pipe, and the engaging protrusion is formed on the end edge side of the other cylindrical pipe. A slope is formed, and the engagement protrusion is inserted into the protrusion insertion hole to After projecting from the inner surface of the other cylindrical pipe, when inserting the reduced diameter end of the one cylindrical pipe into the opening of the end of the other cylindrical pipe, The engaging protrusion rides on the slide guide groove from the inclined surface, moves toward the protrusion insertion hole through the slide guide groove, and is inserted and locked into the matched protrusion insertion hole from the outside of the connecting portion. The above object is achieved by providing a pipe connection structure that is pressed by the elastic portion and holds the engagement state of the engagement protrusion.
[0006]
Further, the present invention is a sleeve member used in the pipe connection structure, by providing a predetermined cut on the peripheral surface of a cylindrical sleeve body having an inner diameter capable of covering the periphery of the connection portion in a close state, Provided is a sleeve member in which the elastic portion that deforms radially outward to generate a biasing force radially inward is formed, and the engaging protrusion is integrally provided protruding from the inner surface of the elastic portion. This achieves the above object.
[0007]
The predetermined cut provided on the peripheral surface of the sleeve main body in the above description means a cut formed in a shape or a position such that all or a part of the sleeve main body can be elastically deformed radially outward. The sleeve body is cut over the entire length in the axial direction, and the sleeve body can be expanded in diameter by widening the interval between the cuts in the circumferential direction, and the entire sleeve body is made an elastic part, or one short side part is left. And the like, in which one short side portion is a base end portion and the other short side portion is an elastic portion that can be deformed radially outward.
[0008]
Furthermore, this invention achieves the said objective by providing the cleaning tool which has a handle | steering_piece which connects and integrates a cylindrical pipe to an axial direction by the connection structure of the said pipe.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The pipe connection structure according to a preferred embodiment of the present invention includes, for example, a cleaning plate to which a cleaning sheet member for cleaning a floor surface or the like is attached, and a handle provided upright from the cleaning plate. In this cleaning tool, the handle is employed when a plurality of cylindrical pipes are connected and integrated in the axial direction (see FIG. 5). In other words, the cleaning tools are disassembled into parts such as cleaning plates and cylindrical pipes for convenience of transportation and sales, and these parts are put together to produce a product. To do.
[0010]
And the connection structure 10 of the pipe of this embodiment is adopted in the connection part of each pair of cylindrical pipes which constitute the handle which consists of a plurality of cylindrical pipes, as shown in FIG. 1 and FIG. One cylindrical pipe 11 has a reduced diameter end 13 inserted into an opening 15 in the other cylindrical pipe 12 at an end 15 to form a connecting portion 16, and a sleeve member 17 disposed so as to cover the connecting portion 16. The pair of cylindrical pipes 11 and 12 are connected and integrated in the axial direction.
[0011]
Here, protrusion insertion holes 18 and 19 are formed in the end portions 13 and 14 of the cylindrical pipes 11 and 12 constituting the connecting portion 16, respectively, and the sleeve member 17 is deformed radially outward. And an elastic portion 20 that generates an urging force radially inward. The protrusion insertion holes 18 and 19 of the end portions 13 and 14 are aligned with each other, and the engaging protrusion 21 provided integrally with the sleeve member 17 is inserted into the corresponding protrusion insertion holes 18 and 19 from the outside of the connecting portion 16. The engaging portion 21 is locked and pressed by the elastic portion 20 to firmly hold the engaging protrusion 21 in a locked state. Further, the engaging protrusion 21 is formed with a slope on the end edge side of the other cylindrical pipe 12.
[0012]
The cylindrical pipes 11 and 12 are metal (aluminum) pipe members each having a cylindrical hollow cross section. The end 13 of one cylindrical pipe 11 is reduced in diameter, and the reduced end 13 is inserted into the opening 15 of the end 14 of the other cylindrical pipe 12 so that one cylindrical pipe is inserted. Thus, a double-structured connecting portion 16 is formed in which the end portion 13 of 11 and the end portion 14 of the other cylindrical pipe 12 overlap each other in close contact.
[0013]
The end 13 of one cylindrical pipe 11 has its outer peripheral surface once reduced in diameter with a steep slope and then gradually reduced in diameter with a gentle slope toward the tip. The end portion 14 of the other cylindrical pipe 12 has an inner peripheral surface that increases in diameter toward the tip with a gentle gradient that matches the gradient of the reduced diameter end portion. Therefore, by inserting the reduced diameter portion of one cylindrical pipe 11 into the opening 15 of the other cylindrical pipe 12 up to the base end portion, the end portions 13 and 24 can be easily brought into close contact with each other.
[0014]
By sliding the double-structured connecting portion 16 in the circumferential direction as appropriate, with the reduced diameter portion of one cylindrical pipe 11 inserted into the opening 15 of the other cylindrical pipe 12 up to its proximal end portion. The projection insertion holes 18 and 19 are formed at positions where the projection insertion holes 18 of one cylindrical pipe 11 can be easily matched with the projection insertion holes 19 of the other cylindrical pipe 12.
[0015]
As shown in FIG. 3, the sleeve member 17 disposed so as to cover the connecting portion 16 has a circular engagement protrusion 21 on the inner surface of a sleeve body 22 which is a cylindrical member made of, for example, a synthetic resin (plastic). It is formed as a single piece. Since the sleeve member 17 is formed with the first cuts 23 over the entire axial length of the sleeve body 22, the interval between the first cuts 23 is increased in the circumferential direction, and the sleeve body 22 is moved radially outward. Therefore, the entire sleeve body 22 forms an auxiliary elastic portion that deforms radially outward and generates a biasing force radially inward.
[0016]
Further, according to the present embodiment, the vertically long U-shaped second cut 24 is formed along the axial direction of the sleeve member 17 at a position substantially opposite to the first cut 23 on the peripheral surface of the sleeve body 22. Yes. According to the second cut 24, the portion not formed with the cut located on the one cylindrical pipe 11 side is used as the base end portion 25, and the other cylindrical pipe 12 side located on the longitudinal U-shaped distal end portion. By lifting up, the portion surrounded by the second cuts 24 can be used as the elastic portion 20 and can be elastically deformed into a diverging plate shape radially outward. The engagement protrusion 21 provided integrally with the sleeve member 17 is formed so as to protrude inside the elastic portion 20, and when the elastic portion 20 is pushed outward, a biasing force is exerted radially inward. Thus, the engaging protrusion 21 can be pushed down.
[0017]
In addition, a ring-shaped contact piece 26 is provided at a substantially central portion on the inner side of the sleeve main body 22 so as to protrude from the inner peripheral surface of the sleeve main body 22. The end portion of the cylindrical pipe 12 is brought into contact with the contact piece 26 for easy positioning.
[0018]
Further, according to the present embodiment, the projecting slide guide groove 27 (see FIG. 1) extending from the end edge portion of the one cylindrical pipe 11 to the projecting insertion hole 18 is connected to the end portion 13 of one cylindrical pipe 11 having a reduced diameter. A shallow concave cross section having a width corresponding to the diameter of the mating protrusion 21 is formed in the axial direction of the cylindrical pipe. Furthermore, according to the present embodiment, the protrusion insertion hole 19 formed in the end portion 14 of the other cylindrical pipe 12 has a circular shape that substantially matches the circular shape of the engaging protrusion 21, The protrusion insertion hole 18 formed at the end of the cylindrical pipe 11 has an oval shape extending obliquely with respect to the axial direction and having a width that substantially matches the diameter of the engagement protrusion 21.
[0019]
And the connection structure 10 of this embodiment can connect and integrate a pair of cylindrical pipes 11 and 12 easily by the simple structure using the sleeve member 17 to an axial direction. In other words, the sleeve member 17 is appropriately expanded in diameter by increasing the interval between the first cuts 23 as necessary, and is closely attached to the outer peripheral surface of the end portion of the other cylindrical pipe 12, and the engagement protrusion 21 is provided. After being inserted into the protrusion insertion hole 19 and projecting from the inner surface of the other cylindrical pipe 12, the reduced diameter end portion 13 of one cylindrical pipe 11 is replaced with the end portion of the other cylindrical pipe 12. It is inserted into 14 openings 15. The engagement protrusion 21 is once pushed up radially outward by contacting the outer peripheral surface of the end portion 13 of one cylindrical pipe 11, but the protrusion insertion hole 18 of one cylindrical pipe 11 is the other cylindrical pipe. 12, the engagement protrusion 21 is pushed down by the urging force of the auxiliary elastic part by the elastic part 20 and the sleeve body 22 as a whole, and the two protrusion insertion holes 18, 19 are moved from the outside of the connecting part 16. Inserted and locked easily and smoothly. Further, the engagement protrusion 21 is pressed by being covered with the elastic portion 20, and easily and reliably holds the engagement state without falling off the protrusion insertion holes 18 and 19.
[0020]
In addition, according to the present embodiment, since the slide guide groove 27 is provided in the reduced diameter end portion 13 of the one cylindrical pipe 11, the end of the one cylindrical pipe 11 is disposed during the mounting operation. If the engagement protrusion 21 is disposed in the slide guide groove 27 at the edge portion, the engagement protrusion 21 rides on the slide guide groove from the inclined surface as the diameter-reduced end portion 13 is inserted into the opening 15. Accordingly, the pair of protrusion insertion holes 18 and 19 can be easily matched without sliding one cylindrical pipe 11 in the circumferential direction. Can be made.
[0021]
Furthermore, according to the present embodiment, the protrusion insertion hole 18 formed in the end portion 13 of one cylindrical pipe 11 has an oval shape extending obliquely with respect to the axial direction. After the mating projection 21 is locked to the other cylindrical pipe 12 side of the projection insertion hole 18, if one cylindrical pipe 11 is rotated with respect to the other cylindrical pipe 12 in the X direction of FIG. The cylindrical projection 11 abuts against the inner wall surface formed obliquely of the projection insertion hole 18 and moves along this, so that one cylindrical pipe 11 is axially shown in FIG. 1 with respect to the other cylindrical pipe 12. The pair of end portions 13 and 14 in the connecting portion 16 can be tightened by sliding to Y, and the strong connecting structure 10 can be obtained.
[0022]
And according to the connection structure 10 of this embodiment, the connection part 16 has the end part 13 of one cylindrical pipe 11 and the end part 14 of the other cylindrical pipe 12 with a considerable length (this embodiment). In this case, even when a large bending stress is applied to the connecting portion 16 when using a cleaning tool, the bending stress is sufficiently applied to the lap portion of the double structure. Therefore, it is possible to effectively avoid loosening and breakage of the connecting portion 16. In particular, since the cylindrical pipes 11 and 12 are metal pipe members, they can exhibit a stronger support force against bending stress.
[0023]
That is, according to the present embodiment, even if a bending stress is applied to the connecting portion 16, it is possible to effectively prevent the connecting portion 16 from being loosened or damaged, and the pair of cylindrical pipes 11 and 12 with a simple structure. Can be easily connected and integrated in the axial direction.
[0024]
The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the protrusion insertion hole of one of the cylindrical pipe may be the same shape as the protrusion insertion hole of the other cylindrical pipe without the oval. Further, it is not always necessary to provide a cut formed over the entire axial length of the sleeve main body and a cut formed in a vertically long U shape, and the elastic portion can be formed by either one of the cuts.
[0026]
Furthermore, the present invention is not limited to the handle of the cleaning tool, but is adopted as a connecting structure for cylindrical pipes in various long rod-shaped members formed by connecting and integrating a plurality of cylindrical pipes in the axial direction. can do.
[0027]
【The invention's effect】
According to the pipe connection structure of the present invention, the sleeve member used in the connection structure, and the cleaning tool, it is possible to effectively prevent loosening and breakage of the connection part even when bending stress is applied to the connection part. With a simple structure, it is possible to easily configure a pipe connection structure in which a pair of cylindrical pipes can be easily connected and integrated in the axial direction.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view illustrating a pipe connection structure according to an embodiment of the present invention.
2A and 2B show a pipe connection structure according to an embodiment of the present invention, wherein FIG. 2A is a cross-sectional view taken along line AA in FIG. 2B, and FIG. 2B is taken along line BB in FIG. It is sectional drawing.
FIG. 3 is a cross-sectional view of only the sleeve member taken along the line CC in FIG. 2B for explaining the sleeve member according to the embodiment of the present invention.
FIG. 4 is a perspective view showing a cleaning tool having a conventional pipe connection structure.
[Explanation of symbols]
10 Pipe connection structure 11, 12 Cylindrical pipe 13 End (reduced diameter end of one cylindrical pipe)
14 End (the end of the other cylindrical pipe)
DESCRIPTION OF SYMBOLS 15 Opening 16 Connection part 17 Sleeve member 18 Projection insertion hole 19 Projection insertion hole 20 Elastic part 21 Engagement projection 22 Sleeve main body 23 1st notch 24 2nd notch 27 Projection slide guide groove

Claims

A pair of cylindrical pipes using a sleeve member disposed so as to cover the connecting portion by inserting the reduced diameter end portion of one cylindrical pipe into the opening of the end portion of the other cylindrical pipe. Is a connecting structure that connects and integrates in the axial direction,
A projection insertion hole is formed at each end of the pair of cylindrical pipes constituting the connecting portion, and the sleeve member has an elastic portion that deforms radially outward and generates a biasing force radially inward. And provided with an engaging protrusion formed to protrude inside,
The elastic portion is formed by providing a longitudinal U-shaped cut along the axial direction of the sleeve member on the circumferential surface of a cylindrical sleeve body having an inner diameter capable of covering the periphery of the connecting portion in a close state. Formed outwardly deforming to generate a biasing force radially inward, and projecting from the inner surface of the elastic portion, the engaging projection is provided integrally.
A projecting slide guide groove extending from the end edge of the one cylindrical pipe to the projecting insertion hole is formed in the axial direction of the cylindrical pipe,
The engaging protrusion has a slope on the end edge side of the other cylindrical pipe,
After the engagement protrusion is inserted into the protrusion insertion hole and protruded from the inner surface of the other cylindrical pipe, the reduced diameter end of the one cylindrical pipe is moved to the other cylindrical shape. When inserting into the opening of the end of the pipe, the engaging protrusion rides on the slide guide groove from the inclined surface, moves toward the protrusion insertion hole through the slide guide groove, A pipe connection structure that is inserted and locked in a protrusion insertion hole that is matched from the outside of the connection portion, and is held down by the elastic portion to hold the engagement protrusion.

The protrusion insertion hole formed at the end of the other cylindrical pipe has a circular shape substantially matching the shape of the engagement protrusion, and the protrusion insertion hole formed at the end of the one cylindrical pipe. Has an elliptical shape extending obliquely with respect to the axial direction, locks the engaging protrusion in the matched protrusion insertion hole, and connects the one cylindrical pipe to the other cylindrical pipe. The pipe connection structure according to claim 1 , wherein said pipe connection structure is slidable in an axial direction by being rotated.

A cleaning tool having a handle formed by connecting and integrating cylindrical pipes in the axial direction by the pipe connection structure according to claim 1.