JP4430916B2

JP4430916B2 - Cutting tool

Info

Publication number: JP4430916B2
Application number: JP2003355929A
Authority: JP
Inventors: 和行早川
Original assignee: Mirai Kogyo KK
Current assignee: Mirai Kogyo KK
Priority date: 2003-10-16
Filing date: 2003-10-16
Publication date: 2010-03-10
Anticipated expiration: 2023-10-16
Also published as: JP2005118253A

Description

この発明は、パイプ類とかモール・ダクト類を切断する切断工具に関するものである。 The present invention relates to a cutting tool for cutting pipes or molding ducts.

従来より、電気工事業者とか設備工事業者は、ケーブルや湯水の配線・配管作業をする際に、配線・配管材を保護するために、電線管とか鞘管等の、パイプ材やモール・ダクト等を、施工現場の状況に応じて、適宜選択して使用していた。 Traditionally, electrical contractors and equipment contractors have been working on pipes, moldings, ducts, etc. to protect wiring and piping materials when wiring and piping work for cables and hot water. Was appropriately selected and used according to the situation of the construction site.

そこで、かかるパイプ材やモール・ダクト等を配線・配管長に応じて切断するための工具として、切断刃と受部とを備えた、パイプカッター（例えば、特許文献１参照）と、ダクトカッター（例えば、特許文献２参照）があり、それぞれを使い分けて作業をしていた。 Therefore, as a tool for cutting such pipe material, molding or duct according to wiring or piping length, a pipe cutter (see, for example, Patent Document 1) including a cutting blade and a receiving portion, and a duct cutter ( For example, there is Patent Document 2), and each of them is used properly.

すなわち、通常、パイプカッターは、パイプ材を受ける受部が、パイプ材の断面形状に対応して、円弧状に形成されていた。そして、ダクトカッターは、モールやダクトを受ける受部が、モールやダクトの底面に対応するフラットな載置面と、その載置面から起立してモールやダクトの側面と係合する係合面とを備えた構成となっていた。 That is, normally, in the pipe cutter, the receiving portion for receiving the pipe material is formed in an arc shape corresponding to the cross-sectional shape of the pipe material. The duct cutter has a flat receiving surface corresponding to the bottom surface of the molding or the duct, and an engaging surface where the receiving part that stands up from the mounting surface engages the side surface of the molding or the duct. It became the composition with.

また、パイプカッターとして、その受部が、円弧状ではなく、略直交する二面で構成されたものもあった（例えば、特許文献３参照）。 In addition, as a pipe cutter, there is a pipe cutter in which the receiving portion is not formed in an arc shape but is formed by two substantially orthogonal surfaces (see, for example, Patent Document 3).

特開平１０−５７６３９号公報Japanese Patent Laid-Open No. 10-57639

特開２００３−９６５号公報JP 2003-965 A

特開２００３−８０４１６号公報JP 2003-80416 A

ところで、前記従来のパイプカッターやダクトカッターにあっては、その受部が、パイプ材あるいはモール・ダクト等の断面形状に即した形状となっており、いずれか一方の工具で、パイプ類とモール・ダクト類との切断を兼用することは困難であった。 By the way, in the said conventional pipe cutter and duct cutter, the receiving part has a shape conforming to the cross-sectional shape of the pipe material or molding duct, etc., and with either tool, pipes and molding -It was difficult to combine with cutting with ducts.

そして、受部が略直交する二面で構成されたパイプカッターにおいては、切断刃による押圧力により、前記二面の入隅部にパイプ材が逃げるように変形し、切断開始時に大きな力を要して、切断が困難となり、また、前記変形により、そのパイプ材の強度を損なう虞もあった。 And, in a pipe cutter composed of two surfaces where the receiving part is substantially perpendicular, the pipe material is deformed so that it escapes to the corners of the two surfaces by the pressing force of the cutting blade, and a large force is required at the start of cutting. Thus, cutting becomes difficult, and the strength of the pipe material may be impaired by the deformation.

この発明は、上記した従来の欠点を解決するためになされたものであり、その目的とするところは、パイプ類とモール・ダクト類とを確実に切断することができる切断工具を提供することにある。 The present invention has been made to solve the above-described conventional drawbacks, and an object of the present invention is to provide a cutting tool capable of reliably cutting pipes and molding ducts. is there.

この発明に係る切断工具は、前記目的を達成するために、次の構成からなる。すなわち、
請求項１に記載の発明に係る切断工具は、被切断材を支持する支持部と、前記被切断材を切断するための切断刃と、前記切断刃を前記支持部側に移動させる操作部とを備える切断工具である。そして、この切断工具における前記支持部には、前記被切断材となる、円筒形状のパイプ類と角部を有するモール・ダクト類とを選択的に支持すべく、前記パイプ類の外周の一部を受ける、凹状かつ円弧状の受面を有するパイプ受部と、前記モール・ダクト類の前記角部と係合する係合段部を有して前記モール・ダクト類を受けるモール・ダクト受部とが設けられている。また、前記操作部の操作により、前記切断刃は、前記支持部に対して回動軸心回りに回動する。そこで、前記パイプ受部は、前記回動軸心から離れた側となる先端側に、第１パイプ受部を備える。そして、前記モール・ダクト受部は、前記第１パイプ受部よりも前記回動軸心側となる基端側に、前記第１パイプ受部と隣接して設けられ、前記係合段部は、前記モール・ダクト受部における、前記第１パイプ受部側であって、前記切断刃が、前記第１パイプ受部の受面にちょうど嵌る前記パイプ類を、切断開始時に押圧する押圧方向に対して、外れた位置に設けられる。 In order to achieve the object, the cutting tool according to the present invention has the following configuration. That is,
A cutting tool according to the first aspect of the present invention includes a support portion that supports a material to be cut, a cutting blade for cutting the material to be cut, and an operation portion that moves the cutting blade toward the support portion. Is a cutting tool. The support portion of the cutting tool has a part of the outer periphery of the pipes so as to selectively support the cylindrical pipes and the molding ducts having corners as the material to be cut. Receiving a molding duct receiving portion having a concave and arc-shaped receiving surface and an engaging step engaging with the corner portion of the molding duct. And are provided. In addition, the cutting blade rotates about the rotation axis with respect to the support portion by the operation of the operation portion. Therefore, the pipe receiving part includes a first pipe receiving part on a tip side that is a side away from the rotation axis. The molding duct receiving part is provided adjacent to the first pipe receiving part on a proximal end side that is closer to the rotational axis than the first pipe receiving part, and the engagement step part is In the pressing direction in which the cutting blade presses the pipes that are just fitted to the receiving surface of the first pipe receiving portion at the start of cutting, on the first pipe receiving portion side in the molding duct receiving portion. On the other hand, it is provided at an off position.

こうして、切断工具の支持部には、パイプ受部とモール・ダクト受部とが設けられており、これらパイプ受部とかモール・ダクト受部により、被切断材となるパイプ類とモール・ダクト類とが選択的に支持される。そして、操作部を操作することで、切断刃が、支持部側に移動し、被切断材が切断される。このとき、パイプ受部の受面は、凹状かつ円弧状に形成されており、パイプ類は、切断刃の押圧による変形が抑えられて、安定して支持される。そして、モール・ダクト受部は、モール・ダクト類の角部と係合する係合段部を有しており、モール・ダクト類は、ずれることなく、安定して支持される。しかも、係合段部が、切断刃の押圧方向に対して、外れた位置に設けられることで、第１パイプ受部の受面にちょうど嵌るパイプ類が、係合段部に逃げるように変形するのを防ぐことができる。 Thus, the cutting tool support section is provided with a pipe receiving section and a molding duct receiving section. By these pipe receiving section or molding duct receiving section, pipes and molding ducts that are materials to be cut are provided. Are selectively supported. And by operating an operation part, a cutting blade moves to the support part side, and a to-be-cut material is cut | disconnected. At this time, the receiving surface of the pipe receiving portion is formed in a concave shape and an arc shape, and the pipes are stably supported while being prevented from being deformed by the pressing of the cutting blade. The molding duct receiving portion has an engaging step portion that engages with a corner of the molding duct, and the molding duct is stably supported without being displaced. In addition, since the engaging step portion is provided at a position deviated from the pressing direction of the cutting blade, the pipes that just fit the receiving surface of the first pipe receiving portion are deformed so as to escape to the engaging step portion. Can be prevented.

また、請求項２に記載の発明に係る切断工具は、被切断材を支持する支持部と、前記被切断材を切断するための切断刃と、前記切断刃を前記支持部側に移動させる操作部とを備える切断工具である。そして、この切断工具における前記支持部には、前記被切断材となる、円筒形状のパイプ類と角部を有するモール・ダクト類とを選択的に支持すべく、前記パイプ類の外周の一部を受ける、凹状かつ円弧状の受面を有するパイプ受部と、前記モール・ダクト類の前記角部と係合する係合段部を有して前記モール・ダクト類を受けるモール・ダクト受部とが設けられている。また、前記操作部の操作により、前記切断刃は、前記支持部に対して回動軸心回りに回動する。そこで、前記パイプ受部は、前記回動軸心から離れた側となる先端側に、第１パイプ受部を備えるとともに、前記モール・ダクト受部の中間に、円弧状の受面を有する第２パイプ受部を備える。この第２パイプ受部の前記受面の円弧は、前記第１パイプ受部の受面の円弧の延長線上に位置する。そして、前記モール・ダクト受部は、前記第１パイプ受部よりも前記回動軸心側となる基端側に、前記第１パイプ受部と隣接して設けられ、前記係合段部は、前記モール・ダクト受部における、前記第１パイプ受部側に形成されている。
こうして、切断工具の支持部には、パイプ受部とモール・ダクト受部とが設けられており、これらパイプ受部とかモール・ダクト受部により、被切断材となるパイプ類とモール・ダクト類とが選択的に支持される。そして、操作部を操作することで、切断刃が、支持部側に移動し、被切断材が切断される。このとき、パイプ受部の受面は、凹状かつ円弧状に形成されており、パイプ類は、切断刃の押圧による変形が抑えられて、安定して支持される。そして、モール・ダクト受部は、モール・ダクト類の角部と係合する係合段部を有しており、モール・ダクト類は、ずれることなく、安定して支持される。しかも、パイプ受部が、第１パイプ受部の他に第２パイプ受部を備えることで、パイプ類は、より安定して支持される。そして、第２パイプ受部が、モール・ダクト受部の中間に設けられることで、位置的に、パイプ受部とモール・ダクト受部との一部が重なることとなり、パイプ受部とモール・ダクト受部とが重なることなく並ぶ場合と比較して、支持部の長さを短くするこができる。 The cutting tool according to the invention described in claim 2 is a support part for supporting a material to be cut, a cutting blade for cutting the material to be cut, and an operation for moving the cutting blade to the support part side. And a cutting tool. The support portion of the cutting tool has a part of the outer periphery of the pipes for selectively supporting cylindrical pipes and moldings and ducts having corners as the material to be cut. Receiving a molding duct receiving portion having a concave and arc-shaped receiving surface and an engaging step engaging with the corner portion of the molding duct. And are provided. In addition, the cutting blade rotates about the rotation axis with respect to the support portion by the operation of the operation portion. Therefore, the pipe receiving portion includes a first pipe receiving portion on a distal end side which is a side away from the rotation axis , and an arc-shaped receiving surface in the middle of the molding duct receiving portion. A two-pipe receiving part is provided . The arc of the receiving surface of the second pipe receiving portion is located on an extension line of the arc of the receiving surface of the first pipe receiving portion. The molding duct receiving portion is provided adjacent to the first pipe receiving portion on a proximal end side that is closer to the rotational axis than the first pipe receiving portion, and the engaging step portion is In the molding duct receiving part, it is formed on the first pipe receiving part side.
Thus, the cutting tool support part is provided with a pipe receiving part and a molding duct receiving part. By these pipe receiving part or molding duct receiving part, the pipes and moldings and ducts which are materials to be cut are obtained. Are selectively supported. And by operating an operation part, a cutting blade moves to the support part side, and a to-be-cut material is cut | disconnected. At this time, the receiving surface of the pipe receiving portion is formed in a concave shape and an arc shape, and the pipes are stably supported while being prevented from being deformed by the pressing of the cutting blade. The molding duct receiving portion has an engaging step portion that engages with a corner of the molding duct, and the molding duct is stably supported without being displaced. Moreover, since the pipe receiving portion includes the second pipe receiving portion in addition to the first pipe receiving portion, the pipes are supported more stably. And since the second pipe receiving part is provided in the middle of the molding duct receiving part, the pipe receiving part and the molding duct receiving part partially overlap each other. Compared with the case where the duct receiving portions are arranged without overlapping, the length of the support portion can be shortened.

また、請求項３に記載の発明に係る切断工具は、被切断材を支持する支持部と、前記被切断材を切断するための切断刃と、前記切断刃を前記支持部側に移動させる操作部とを備える切断工具である。そして、この切断工具における前記支持部には、前記被切断材となる、円筒形状のパイプ類と角部を有するモール・ダクト類とを選択的に支持すべく、前記パイプ類の外周の一部を受ける、凹状かつ円弧状の受面を有するパイプ受部と、前記モール・ダクト類の前記角部と係合する係合段部を有して前記モール・ダクト類を受けるモール・ダクト受部とが設けられている。また、前記操作部の操作により、前記切断刃は、前記支持部に対して回動軸心回りに回動する。そこで、前記パイプ受部は、前記回動軸心から離れた側となる先端側に、第１パイプ受部を備えるとともに、前記モール・ダクト受部よりも前記回動軸心側となる基端側に、前記モール・ダクト受部と隣接して、円弧状の受面を有する第３パイプ受部を備える。この第３パイプ受部の前記受面の円弧は、前記第１パイプ受部の受面の円弧の延長線上に位置する。そして、前記モール・ダクト受部は、前記第１パイプ受部よりも前記回動軸心側となる基端側に、前記第１パイプ受部と隣接して設けられ、前記係合段部は、前記モール・ダクト受部における、前記第１パイプ受部側に形成されている。
こうして、切断工具の支持部には、パイプ受部とモール・ダクト受部とが設けられており、これらパイプ受部とかモール・ダクト受部により、被切断材となるパイプ類とモール・ダクト類とが選択的に支持される。そして、操作部を操作することで、切断刃が、支持部側に移動し、被切断材が切断される。このとき、パイプ受部の受面は、凹状かつ円弧状に形成されており、パイプ類は、切断刃の押圧による変形が抑えられて、安定して支持される。そして、モール・ダクト受部は、モール・ダクト類の角部と係合する係合段部を有しており、モール・ダクト類は、ずれることなく、安定して支持される。しかも、パイプ受部が、先端側に設けられた第１パイプ受部の他に第３パイプ受部を備えることで、パイプ類は、より安定して支持される。そして、第３パイプ受部が、モール・ダクト受部よりも基端側に設けられることで、位置的に、パイプ受部とモール・ダクト受部とが重なることとなり、パイプ受部とモール・ダクト受部とが重なることなく並ぶ場合と比較して、支持部の長さを短くするこができる。 According to a third aspect of the present invention, there is provided a cutting tool comprising: a support portion for supporting a material to be cut; a cutting blade for cutting the material to be cut; and an operation for moving the cutting blade toward the support portion. And a cutting tool. The support portion of the cutting tool has a part of the outer periphery of the pipes so as to selectively support the cylindrical pipes and the molding ducts having corners as the material to be cut. Receiving a molding duct receiving portion having a concave and arc-shaped receiving surface and an engaging step engaging with the corner portion of the molding duct. And are provided. In addition, the cutting blade rotates about the rotation axis with respect to the support portion by the operation of the operation portion. Therefore, the pipe receiving portion includes a first pipe receiving portion on a distal end side which is a side away from the rotation axis, and a proximal end which is closer to the rotation axis than the molding duct receiving portion. A third pipe receiving portion having an arc-shaped receiving surface is provided adjacent to the molding duct receiving portion. The arc of the receiving surface of the third pipe receiving portion is located on an extension line of the arc of the receiving surface of the first pipe receiving portion. The molding duct receiving part is provided adjacent to the first pipe receiving part on a proximal end side that is closer to the rotational axis than the first pipe receiving part, and the engagement step part is The molding duct receiving portion is formed on the first pipe receiving portion side.
Thus, the cutting tool support section is provided with a pipe receiving section and a molding duct receiving section. By these pipe receiving section or molding duct receiving section, pipes and molding ducts that are materials to be cut are provided. Are selectively supported. And by operating an operation part, a cutting blade moves to the support part side, and a to-be-cut material is cut | disconnected. At this time, the receiving surface of the pipe receiving portion is formed in a concave shape and an arc shape, and the pipes are stably supported while being prevented from being deformed by the pressing of the cutting blade. The molding duct receiving portion has an engaging step portion that engages with a corner of the molding duct, and the molding duct is stably supported without being displaced. In addition, since the pipe receiving portion includes the third pipe receiving portion in addition to the first pipe receiving portion provided on the distal end side, the pipes are supported more stably. Since the third pipe receiving part is provided on the base end side with respect to the molding duct receiving part, the pipe receiving part and the molding duct receiving part overlap with each other. Compared with the case where the duct receiving portions are arranged without overlapping, the length of the support portion can be shortened.

また、請求項４に記載の発明に係る切断工具は、請求項１記載の切断工具において、前記パイプ受部は、前記モール・ダクト受部の中間に、円弧状の受面を有する第２パイプ受部を備える。そして、この第２パイプ受部の前記受面の円弧は、前記第１パイプ受部の受面の円弧の延長線上に位置する。こうして、パイプ受部が、第１パイプ受部の他に第２パイプ受部を備えることで、パイプ類は、より安定して支持される。そして、第２パイプ受部が、モール・ダクト受部の中間に設けられることで、位置的に、パイプ受部とモール・ダクト受部との一部が重なることとなり、パイプ受部とモール・ダクト受部とが重なることなく並ぶ場合と比較して、支持部の長さを短くするこができる。 The cutting tool according to a fourth aspect of the present invention is the cutting tool according to the first aspect , wherein the pipe receiving portion has an arc-shaped receiving surface in the middle of the molding duct receiving portion. A receiving part is provided. And the circular arc of the said receiving surface of this 2nd pipe receiving part is located on the extension line of the circular arc of the receiving surface of the said 1st pipe receiving part. Thus, the pipes are supported more stably by providing the pipe receiver with the second pipe receiver in addition to the first pipe receiver. And since the second pipe receiving part is provided in the middle of the molding duct receiving part, the pipe receiving part and the molding duct receiving part partially overlap each other. Compared with the case where the duct receiving portions are arranged without overlapping, the length of the support portion can be shortened.

また、請求項５に記載の発明に係る切断工具は、請求項１、２または４に記載の切断工具において、前記パイプ受部は、前記モール・ダクト受部よりも前記回動軸心側となる基端側に、前記モール・ダクト受部と隣接して、円弧状の受面を有する第３パイプ受部を備える。そして、この第３パイプ受部の前記受面の円弧は、前記第１パイプ受部の受面の円弧の延長線上に位置する。こうして、パイプ受部が、先端側に設けられた第１パイプ受部の他に第３パイプ受部を備えることで、パイプ類は、より安定して支持される。そして、第３パイプ受部が、モール・ダクト受部よりも基端側に設けられることで、位置的に、パイプ受部とモール・ダクト受部とが重なることとなり、パイプ受部とモール・ダクト受部とが重なることなく並ぶ場合と比較して、支持部の長さを短くするこができる。 A cutting tool according to a fifth aspect of the present invention is the cutting tool according to the first, second, or fourth aspect , wherein the pipe receiving portion is located closer to the rotational axis than the molding duct receiving portion. And a third pipe receiving portion having an arc-shaped receiving surface adjacent to the molding duct receiving portion. And the circular arc of the said receiving surface of this 3rd pipe receiving part is located on the extension line of the circular arc of the receiving surface of the said 1st pipe receiving part. Thus, the pipes are supported more stably by providing the third pipe receiving part in addition to the first pipe receiving part provided on the distal end side. Since the third pipe receiving part is provided on the base end side with respect to the molding duct receiving part, the pipe receiving part and the molding duct receiving part overlap with each other. Compared with the case where the duct receiving portions are arranged without overlapping, the length of the support portion can be shortened.

以上、詳述したところから明らかなように、この発明に係る切断工具によれば、パイプ類は、凹状かつ円弧状の受面を有するパイプ受部により、切断刃の押圧による変形が抑えられて、安定して支持され、そして、モール・ダクト類は、モール・ダクト受部の係合段部により、ずれることなく、安定して支持されるので、これらパイプ類とモール・ダクト類とを確実に切断することができる。 As described above in detail, according to the cutting tool according to the present invention, the pipes are suppressed from being deformed by the pressing of the cutting blade by the pipe receiving portion having the concave and arc-shaped receiving surface. The molding and ducts are stably supported without being displaced by the engaging step of the molding and duct receiving part, so that these pipes and moldings and ducts can be secured. Can be cut into pieces.

以下、この発明に係る切断工具を実施するための最良の形態を図面に基づいて説明する。 The best mode for carrying out the cutting tool according to the present invention will be described below with reference to the drawings.

図１ないし図５は、本発明に係る切断工具の一実施の形態を示す。図中符号１は、被切断材である。２は、前記被切断材１となる、円筒形状のパイプ類である。３は、同じく前記被切断材１となる、角部３ａを有するモール・ダクト類、すなわち、ケーブルを収容するモールやダクト、あるいは、エアコン配管用の冷媒管を収容するダクト等である。４は、切断工具である。 1 to 5 show an embodiment of a cutting tool according to the present invention. Reference numeral 1 in the figure denotes a material to be cut. Reference numeral 2 denotes cylindrical pipes that become the material 1 to be cut. 3 is a molding or duct having corner portions 3a, which is also the material 1 to be cut, that is, a molding or duct for storing a cable, a duct for storing a refrigerant pipe for air conditioning piping, or the like. 4 is a cutting tool.

切断工具４は、被切断材１を支持する支持部５と、被切断材１を切断するための切断刃６と、その切断刃６を支持部５側に移動させる操作部７とを備える。ここで、支持部５には、被切断材１としての、前記パイプ類２と前記モール・ダクト類３とを選択的に支持すべく、パイプ類２の外周の一部を受ける、凹状かつ円弧状の受面を有するパイプ受部８と、モール・ダクト類３の角部３ａと係合する係合段部９ａを有してモール・ダクト類３を受けるモール・ダクト受部９とが設けられている。 The cutting tool 4 includes a support portion 5 that supports the workpiece 1, a cutting blade 6 for cutting the workpiece 1, and an operation portion 7 that moves the cutting blade 6 toward the support portion 5. Here, the support 5 receives a part of the outer periphery of the pipes 2 to selectively support the pipes 2 and the molding ducts 3 as the material 1 to be cut. A pipe receiving portion 8 having an arc-shaped receiving surface and a molding duct receiving portion 9 having an engaging step portion 9a that engages with a corner portion 3a of the molding duct 3 and receiving the molding duct 3 are provided. It has been.

詳細には、切断工具４は、操作部７の操作により、切断刃６が、支持部５に対して回動軸心１０回りに回動する。そして、パイプ受部８は、回動軸心１０から離れた側となる先端側に、第１パイプ受部８ａを備えている。一方、モール・ダクト受部９は、前記第１パイプ受部８ａよりも回動軸心１０側となる基端側に、第１パイプ受部８ａと隣接して設けられている。そして、係合段部９ａは、モール・ダクト受部９における、第１パイプ受部８ａ側に形成されている。 Specifically, in the cutting tool 4, the cutting blade 6 rotates about the rotation axis 10 with respect to the support unit 5 by the operation of the operation unit 7. And the pipe receiving part 8 is equipped with the 1st pipe receiving part 8a in the front end side used as the side away from the rotating shaft center 10. FIG. On the other hand, the molding duct receiving part 9 is provided adjacent to the first pipe receiving part 8a on the proximal end side which is closer to the rotational axis 10 than the first pipe receiving part 8a. The engaging step portion 9a is formed on the first pipe receiving portion 8a side in the molding duct receiving portion 9.

より詳細には、パイプ受部８は、第１パイプ受部８ａの他に、モール・ダクト受部９の中間に、円弧状の受面を有する第２パイプ受部８ｂを備えている。そして、この第２パイプ受部８ｂの受面の円弧は、第１パイプ受部８ａの受面の円弧の延長線上に位置している。さらに、パイプ受部８は、モール・ダクト受部９よりも回動軸心１０側となる基端側に、モール・ダクト受部９と隣接して、円弧状の受面を有する第３パイプ受部８ｃを備えている。そして、この第３パイプ受部８ｃの受面の円弧は、第１パイプ受部８ａの受面の円弧の延長線上に位置している。 More specifically, in addition to the first pipe receiving portion 8a, the pipe receiving portion 8 includes a second pipe receiving portion 8b having an arc-shaped receiving surface in the middle of the molding duct receiving portion 9. And the circular arc of the receiving surface of this 2nd pipe receiving part 8b is located on the extension line of the circular arc of the receiving surface of the 1st pipe receiving part 8a. Further, the pipe receiving portion 8 is a third pipe having an arc-shaped receiving surface adjacent to the molding duct receiving portion 9 on the proximal end side that is closer to the rotational axis 10 than the molding duct receiving portion 9. A receiving portion 8c is provided. And the circular arc of the receiving surface of this 3rd pipe receiving part 8c is located on the extension line of the circular arc of the receiving surface of the 1st pipe receiving part 8a.

具体的には、切断工具４は、第１本体１１と、第２本体１２とを備えている。第１本体１１は、横長に形成されて、その一方側が、第１の柄部１１ａとなり、他方側が、第１の柄部１１ａから順に延設された、軸受部１１ｂおよび前記支持部５となっている。軸受部１１ｂには、上下に貫通する溝１１ｃと、その溝１１ｃに直交して、前記回動軸心１０を形成する軸孔１１ｄとが明けられている。また、支持部５には、前述のように、パイプ受部８とモール・ダクト受部９とが設けられている。そして、これらパイプ受部８およびモール・ダクト受部９には、溝１１ｃに連通するようにして、スリット５ａが形成されている。また、モール・ダクト受部９は、モール・ダクト類３が、その底面が当接するようにして載置される、例えば平面状の、載置面９ｂを有している。そして、その載置面９ｂの、前記第１パイプ受部８ａ側に、前記係合段部９ａが設けられている。この係合段部９ａは、前記第１パイプ受部８ａにつながるように、前記載置面９ｂの一端部から立ち上る、立上り面を備える。そして、この係合段部９ａの位置は、切断刃６が、第１パイプ受部８ａの受面にちょうど嵌る（図示実施の形態においては、第１ないし第３パイプ受部８ａ、８ｂ、８ｃの受面にちょうど嵌る）パイプ類２を、切断開始時に押圧する押圧方向に対して、外れた位置となっている。また、載置面９ｂの、前記第３パイプ受部８ｃ側に、段部９ｃが設けられている。この段部９ｃは、前記第３パイプ受部８ｃにつながるように、前記載置面９ｂの他端部から立ち上る、立上り面を備える。そして、前記第２パイプ受部８ｂの受面は、モール・ダクト受部９の中間に位置するように、前記載置面９ｂの中間部分に形成されている。 Specifically, the cutting tool 4 includes a first main body 11 and a second main body 12. The 1st main body 11 is formed horizontally long, the one side becomes the 1st handle | pattern part 11a, and the other side becomes the bearing part 11b and the said support part 5 extended in order from the 1st handle | pattern part 11a. ing. In the bearing portion 11b, a groove 11c penetrating in the vertical direction and a shaft hole 11d that forms the rotation axis 10 perpendicular to the groove 11c are opened. Further, the support portion 5 is provided with the pipe receiving portion 8 and the molding duct receiving portion 9 as described above. A slit 5a is formed in the pipe receiving portion 8 and the molding duct receiving portion 9 so as to communicate with the groove 11c. Further, the molding duct receiving portion 9 has a mounting surface 9b, for example, planar, on which the molding duct 3 is mounted such that the bottom surface thereof abuts. And the engagement step part 9a is provided in the said 1st pipe receiving part 8a side of the mounting surface 9b. The engaging step portion 9a includes a rising surface that rises from one end portion of the mounting surface 9b so as to be connected to the first pipe receiving portion 8a. And the position of this engagement step part 9a is such that the cutting blade 6 just fits the receiving surface of the first pipe receiving part 8a (in the illustrated embodiment, the first to third pipe receiving parts 8a, 8b, 8c). The pipes 2 that just fit in the receiving surface are in a position away from the pressing direction in which the pipes 2 are pressed at the start of cutting. Further, a step portion 9c is provided on the placement surface 9b on the third pipe receiving portion 8c side. The step portion 9c includes a rising surface that rises from the other end portion of the placement surface 9b so as to be connected to the third pipe receiving portion 8c. And the receiving surface of the said 2nd pipe receiving part 8b is formed in the intermediate part of the mounting surface 9b mentioned above so that it may be located in the middle of the mall duct receiving part 9. FIG.

一方、第２本体１２は、本体部１３と、前記切断刃６を備えた刃体１４とからなる。本体部１３は、横長に形成されて、その一方側が、第２の柄部１３ａとなり、他方側が、第２の柄部１３ａから延設された延設部１３ｂとなっている。そして、延設部１３ｂには、スリット１３ｃと、そのスリット１３ｃに直交する軸孔１３ｄとが形成されている。
刃体１４は、その後方側が前記延設部１３ｂのスリット１３ｃに挿入され、その延設部１３ｂに、固着具としての取付ネジ１５、１５によって着脱可能に固定される。図示実施の形態においては、取付ネジ１５は、延設部１３ｂにおけるスリット１３ｃを挟む一方の片１３ｅに明けられた孔１３ｆを通り、刃体１４に明けられた通孔１４ａに挿入され、そして、延設部１３ｂにおけるスリット１３ｃを挟む他方の片１３ｇにねじ込まれる。こうして、刃体１４は、取付部となる延設部１３ｂに固定され、この刃体１４における、延設部１３ｂから突出する前方側が、前記切断刃６となる。ここで、刃体１４は、前後が対称となるように形成されており、その前後を反転して、延設部１３ｂに取付固定できるようになっている。 On the other hand, the second main body 12 includes a main body portion 13 and a blade body 14 provided with the cutting blade 6. The main body portion 13 is formed in a horizontally long shape, and one side thereof becomes a second handle portion 13a, and the other side thereof becomes an extended portion 13b extended from the second handle portion 13a. The extending portion 13b is formed with a slit 13c and a shaft hole 13d orthogonal to the slit 13c.
The rear side of the blade body 14 is inserted into the slit 13c of the extension portion 13b, and is fixed to the extension portion 13b in a detachable manner by attachment screws 15 and 15 as fixing tools. In the illustrated embodiment, the mounting screw 15 passes through a hole 13f opened in one piece 13e sandwiching the slit 13c in the extending portion 13b, is inserted into a through hole 14a opened in the blade body 14, and The extension portion 13b is screwed into the other piece 13g sandwiching the slit 13c. Thus, the blade body 14 is fixed to the extended portion 13b serving as the attachment portion, and the front side of the blade body 14 protruding from the extended portion 13b is the cutting blade 6. Here, the blade body 14 is formed so as to be symmetrical in the front-rear direction, and can be attached and fixed to the extending portion 13b by reversing the front-rear direction.

第１本体１１と第２本体１２との組付けにおいては、それら第１本体１１と第２本体１２とが交差するように、第１本体１１の軸受部１１ｂにおける溝１１ｃに、第２本体１２における延設部１３ｂが挿入される。そこで、軸部材１６が、軸受部１１ｂの一面側から、第１および第２本体１１、１２における軸孔１１ｄ、１３ｄ、そして、刃体１４に明けられた逃し孔１４ｂに挿入される。そして、軸受部１１ｂの他面側から、ネジ１７が軸部材１６にねじ込まれて、その軸部材１６は、留められる。こうして、前記操作部７となる、第１の柄部１１ａと第２の柄部１３ａとを、互いに接近あるいは離間するように操作することで、第１本体１１に対して、第２本体１２が、相対的に、前記回動軸心１０となる、軸部材１６の軸中心回りに回動する。そして、第１の柄部１１ａと第２の柄部１３ａとを、互いに接近するように操作すると、切断刃６は、支持部５側に移動し、その切断刃６の刃先は、支持部５のスリット５ａに挿入される（図１参照）。 In the assembly of the first main body 11 and the second main body 12, the second main body 12 is inserted into the groove 11c in the bearing portion 11b of the first main body 11 so that the first main body 11 and the second main body 12 intersect each other. The extending portion 13b is inserted. Therefore, the shaft member 16 is inserted into the shaft holes 11d and 13d in the first and second main bodies 11 and 12 and the escape hole 14b opened in the blade body 14 from one surface side of the bearing portion 11b. Then, the screw 17 is screwed into the shaft member 16 from the other surface side of the bearing portion 11b, and the shaft member 16 is fastened. Thus, by operating the first handle portion 11a and the second handle portion 13a, which are the operation portion 7, so as to approach or separate from each other, the second main body 12 can be moved relative to the first main body 11. Rotate relatively around the axis center of the shaft member 16 that becomes the rotation axis 10. And if the 1st handle | pattern part 11a and the 2nd handle | pattern part 13a are operated so that it may mutually approach, the cutting blade 6 will move to the support part 5 side, and the cutting edge of the cutting blade 6 will be the support part 5 Is inserted into the slit 5a (see FIG. 1).

また、この切断工具４は、第１の柄部１１ａと第２の柄部１３ａとを離間する方向に弾性付勢する、弾性材としてのトーションスプリング１８を備えている。図示実施の形態においては、トーションスプリング１８は、支持ピン１９、１９により、第２の柄部１３ａに支持されて、第１の柄部１１ａを第２の柄部１３ａから離れる方向に付勢している。また、切断工具４は、第１の柄部１１ａと第２の柄部１３ａとを接近した位置に保持する保持手段２０を備えている。この保持手段２０は、一方の柄部（図示実施の形態においては、第２の柄部１３ａ）に回動可能に取り付けられた係合部材２０ａと、他方の柄部（図示実施の形態においては、第１の柄部１１ａ）に設けられて、前記係合部材２０ａが係合する被係合部としての被係合ピン２０ｂとからなる。こうして、第１の柄部１１ａと第２の柄部１３ａとが接近した状態で、係合部材２０ａを被係合ピン２０ｂに係合するよう回動することで、第１の柄部１１ａと第２の柄部１３ａとの接近した状態が保持される。そして、係合部材２０ａを被係合ピン２０ｂから外すよう回動すると、第１の柄部１１ａと第２の柄部１３ａとは、トーションスプリング１８に弾性付勢されて、離間し、支持部５と切断刃６との間が開く。なお、図３は、パイプ受部８（第１ないし第３パイプ受部８ａ、８ｂ、８ｃ）の受面の半径と一致する半径を有してそのパイプ受部８にちょうど嵌まるようにして、パイプ受部８に支持された径大のパイプ類２を切断する状態を示している。そして、図４は、第１パイプ受部８に支持された径小のパイプ類２を切断する状態を示している。また、図５は、モール・ダクト受部９に支持されたモール・ダクト類３を切断する状態を示している。 Further, the cutting tool 4 includes a torsion spring 18 as an elastic material that elastically biases the first handle portion 11a and the second handle portion 13a in the direction of separating them. In the illustrated embodiment, the torsion spring 18 is supported by the second handle portion 13a by the support pins 19 and 19, and biases the first handle portion 11a away from the second handle portion 13a. ing. Moreover, the cutting tool 4 is provided with the holding means 20 which hold | maintains the 1st handle | pattern part 11a and the 2nd handle | pattern part 13a in the position which approached. The holding means 20 includes an engaging member 20a rotatably attached to one handle (second handle 13a in the illustrated embodiment) and the other handle (in the illustrated embodiment). , The first handle portion 11a) and an engaged pin 20b as an engaged portion with which the engaging member 20a engages. Thus, in a state where the first handle portion 11a and the second handle portion 13a are close to each other, the engaging member 20a is rotated so as to engage with the engaged pin 20b. The approached state with the second handle 13a is maintained. When the engaging member 20a is rotated so as to be disengaged from the engaged pin 20b, the first handle portion 11a and the second handle portion 13a are elastically biased by the torsion spring 18 to be separated from each other, and the support portion. The space between 5 and the cutting blade 6 opens. 3 has a radius that coincides with the radius of the receiving surface of the pipe receiving portion 8 (first to third pipe receiving portions 8a, 8b, 8c) so that the pipe receiving portion 8 just fits. The state which cut | disconnects the large diameter pipes 2 supported by the pipe receiving part 8 is shown. FIG. 4 shows a state where the small diameter pipes 2 supported by the first pipe receiving portion 8 are cut. FIG. 5 shows a state where the molding duct 3 supported by the molding duct receiving section 9 is cut.

次に、以上の構成からなる切断工具４の作用効果について説明する。この切断工具４によると、支持部５には、パイプ受部８とモール・ダクト受部９とが設けられており、これらパイプ受部８とかモール・ダクト受部９により、被切断材１となるパイプ類２とモール・ダクト類３とが選択的に支持される。そして、操作部７となる第１および第２の柄部１１ａ、１３ａを握るように操作することで、切断刃６が、支持部５側に移動し、被切断材１が切断される。このとき、パイプ受部８の受面は、凹状かつ円弧状に形成されており、パイプ類２は、切断刃６の押圧による変形が抑えられて、安定して支持される（図３、図４参照）。そして、モール・ダクト受部９は、モール・ダクト類３の角部３ａと係合する係合段部９ａを有しており、モール・ダクト類３は、ずれることなく、安定して支持される（図５参照）。このように、パイプ類２とモール・ダクト類３とが安定して支持されることで、これらパイプ類２とモール・ダクト類３とを確実に切断することができる。 Next, the effect of the cutting tool 4 having the above configuration will be described. According to this cutting tool 4, the support portion 5 is provided with a pipe receiving portion 8 and a molding duct receiving portion 9, and the pipe receiving portion 8 or the molding duct receiving portion 9 allows the material to be cut 1 The pipes 2 and the molding ducts 3 are selectively supported. And by operating so that the 1st and 2nd handle | pattern parts 11a and 13a used as the operation part 7 may be grasped, the cutting blade 6 moves to the support part 5 side, and the to-be-cut material 1 is cut | disconnected. At this time, the receiving surface of the pipe receiving portion 8 is formed in a concave shape and an arc shape, and the pipes 2 are stably supported while being prevented from being deformed by the pressing of the cutting blade 6 (FIGS. 3 and 3). 4). The molding duct receiving portion 9 has an engaging step 9a that engages with the corner 3a of the molding duct 3 so that the molding duct 3 is stably supported without being displaced. (See FIG. 5). Thus, the pipes 2 and the molding ducts 3 are stably supported, so that the pipes 2 and the molding ducts 3 can be reliably cut.

さらに、パイプ受部８が、第１パイプ受部８ａの他に第２パイプ受部８ｂとか第３パイプ受部８ｃを備えることで、パイプ類２は、より安定して支持される。そして、第２パイプ受部８ｂが、第１パイプ受部８ａより基端側に位置するモール・ダクト受部９の中間に設けられることで、位置的に、パイプ受部８とモール・ダクト受部９との一部が重なることとなり、パイプ受部８とモール・ダクト受部９とが重なることなく並ぶ場合と比較して、支持部５の長さを短くするこができる。また、第３パイプ受部８ｃにおいても、その第３パイプ受部８ｃが、第１パイプ受部８ａより基端側に位置するモール・ダクト受部９よりも、基端側に設けられることで、位置的に、パイプ受部８とモール・ダクト受部９とが重なることとなり、パイプ受部８とモール・ダクト受部９とが重なることなく並ぶ場合と比較して、支持部５の長さを短くするこができる。 Furthermore, since the pipe receiving part 8 includes the second pipe receiving part 8b or the third pipe receiving part 8c in addition to the first pipe receiving part 8a, the pipes 2 are supported more stably. The second pipe receiving portion 8b is provided in the middle of the molding duct receiving portion 9 located on the base end side from the first pipe receiving portion 8a, so that the pipe receiving portion 8 and the molding duct receiving portion are positioned. A portion of the support portion 5 overlaps, and the length of the support portion 5 can be shortened as compared with the case where the pipe receiving portion 8 and the molding duct receiving portion 9 are arranged without overlapping. Also, in the third pipe receiving portion 8c, the third pipe receiving portion 8c is provided on the base end side with respect to the molding duct receiving portion 9 located on the base end side from the first pipe receiving portion 8a. As a result, the pipe receiving portion 8 and the mall duct receiving portion 9 overlap each other, and the length of the support portion 5 is longer than the case where the pipe receiving portion 8 and the mall duct receiving portion 9 are arranged without overlapping. Can be shortened.

また、係合段部９ａは、切断刃６が、第１パイプ受部８ａの受面にちょうど嵌る（図示実施の形態においては、第１ないし第３パイプ受部８ａ、８ｂ、８ｃの受面にちょうど嵌る）パイプ類２を、切断開始時に押圧する押圧方向に対して、外れた位置に設けられている。したがって、このパイプ類２が、係合段部９ａに逃げるように変形するのを防ぐことができる。 Further, in the engaging step portion 9a, the cutting blade 6 fits just on the receiving surface of the first pipe receiving portion 8a (in the illustrated embodiment, the receiving surfaces of the first to third pipe receiving portions 8a, 8b, 8c). The pipes 2 that are just fitted to (2) are provided at positions away from the pressing direction of pressing at the start of cutting. Therefore, the pipes 2 can be prevented from being deformed so as to escape to the engagement step portion 9a.

また、切断刃６を備える刃体１４は、前後を反転して、取付部となる延設部１３ｂに取付固定可能となっている。したがって、刃体１４の前後の各側を、切断刃６として使用することができ、この刃体１４をむだなく使用することができる。 Moreover, the blade body 14 provided with the cutting blade 6 can be attached and fixed to the extended portion 13b serving as an attachment portion by reversing the front and rear. Therefore, the front and rear sides of the blade body 14 can be used as the cutting blade 6, and the blade body 14 can be used without difficulty.

なお、本発明は、上述した実施の形態に限定されるわけではなく、その他種々の変更が可能である。例えば、参考例ではあるが、切断刃６は、支持部５に対して、回動軸心１０回りに回動しなくとも、切断刃６を支持部５側に移動させることができるのであれば、並進運動等、その他の運動によって移動するものであってもよい。また、ここにいう、回動軸心１０回りに回動とは、第２本体１２が、第１本体１１に対して、回動する場合の他に、リンク機構等により切断刃６部分が回動する場合も含むものである。 In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, although it is a reference example, the cutting blade 6 can move the cutting blade 6 toward the support portion 5 without rotating around the rotation axis 10 with respect to the support portion 5. It may be moved by other motion such as translational motion. In addition, the rotation about the rotation axis 10 here means that the cutting blade 6 is rotated by a link mechanism or the like in addition to the case where the second main body 12 rotates relative to the first main body 11. It also includes the case of moving.

また、支持部５における、パイプ受部８とモール・ダクト受部９との、配置とか構成は、図示実施の形態に限定されるものではなく、参考例ではあるが、パイプ類２とモール・ダクト類３とが選択的に支持されるのであれば、どのような配置あるいは構成であってもよい。そして、このように、切断工具４の構成は、パイプ類２とモール・ダクト類３とが選択的に支持されることが要件となっているが、勿論、パイプ類２とモール・ダクト類３とを同時に支持することが可能となっていてもよい。また、パイプ受部８は、凹状かつ円弧状の受面を有しているが、この受面は、単一の円弧で形成される必要はく、例えば、中心の異なるあるいは曲率の異なる、複数の円弧で形成されてもよい。 Further, the arrangement or configuration of the pipe receiving portion 8 and the molding duct receiving portion 9 in the support portion 5 is not limited to the illustrated embodiment, but is a reference example. Any arrangement or configuration may be adopted as long as the ducts 3 are selectively supported. As described above, the configuration of the cutting tool 4 is required to selectively support the pipes 2 and the molding ducts 3. Of course, the pipes 2 and the molding ducts 3 are required. It may be possible to support these simultaneously. Further, the pipe receiving portion 8 has a concave and arc-shaped receiving surface, but this receiving surface does not need to be formed by a single arc, for example, a plurality of different centers or different curvatures. It may be formed of a circular arc.

この発明に係る切断工具の一実施の形態の、斜視図である。It is a perspective view of one embodiment of a cutting tool concerning this invention. 同じく、分解斜視図である。Similarly, it is an exploded perspective view. 同じく、径大のパイプ類を切断する状態を示す正面図である。Similarly, it is a front view showing a state where large diameter pipes are cut. 同じく、径小のパイプ類を切断する状態を示す正面図である。Similarly, it is a front view which shows the state which cut | disconnects small diameter pipes. 同じく、モール・ダクト類を切断する状態を示す正面図である。Similarly, it is a front view which shows the state which cut | disconnects a mall duct.

１被切断材
２パイプ類
３モール・ダクト類
３ａ角部
４切断工具
５支持部
６切断刃
７操作部
８パイプ受部
８ａ第１パイプ受部
８ｂ第２パイプ受部
８ｃ第３パイプ受部
９モール・ダクト受部
９ａ係合段部
１０回動軸心 DESCRIPTION OF SYMBOLS 1 Material to be cut 2 Pipes 3 Mall | ducts 3a Corner | angular part 4 Cutting tool 5 Support part 6 Cutting blade 7 Operation part 8 Pipe receiving part 8a 1st pipe receiving part 8b 2nd pipe receiving part 8c 3rd pipe receiving part 9 Mall duct receiving part 9a Engagement step part 10 Rotation axis

Claims

A cutting tool comprising: a support part for supporting a material to be cut; a cutting blade for cutting the material to be cut; and an operation part for moving the cutting blade to the support part side,
The support portion is a concave and circular shape that receives a part of the outer periphery of the pipes so as to selectively support cylindrical pipes and moldings and ducts having corners, which are the material to be cut. A pipe receiving portion having an arc-shaped receiving surface, a molding duct receiving portion having an engaging step portion that engages with the corner portion of the molding ducts and receiving the molding ducts , and ,
By the operation of the operation unit, the cutting blade rotates about a rotation axis with respect to the support unit,
The pipe receiving portion includes a first pipe receiving portion on a distal end side which is a side away from the rotation axis,
The molding duct receiving part is provided adjacent to the first pipe receiving part on a proximal end side that is closer to the rotational axis than the first pipe receiving part, and the engaging step part is In the molding duct receiving section, on the first pipe receiving section side, the pressing blade presses the pipes that just fit into the receiving surface of the first pipe receiving section at the start of cutting. , provided on the edge position cutting tool according to claim Rukoto.

A cutting tool comprising: a support part for supporting a material to be cut; a cutting blade for cutting the material to be cut; and an operation part for moving the cutting blade to the support part side,
The support portion is a concave and circular shape that receives a part of the outer periphery of the pipes so as to selectively support cylindrical pipes and moldings and ducts having corners, which are the material to be cut. A pipe receiving portion having an arc-shaped receiving surface, a molding duct receiving portion having an engaging step portion that engages with the corner portion of the molding ducts and receiving the molding ducts, and ,
By the operation of the operation unit, the cutting blade rotates about a rotation axis with respect to the support unit,
The pipe receiving portion, the distal end side serving as the rotating shaft heart far side, Rutotomoni comprises a first pipe receiving portion, in the middle of the mall duct receiving portion, the second having an arcuate receiving surface A pipe receiving portion, the arc of the receiving surface of the second pipe receiving portion is located on an extension line of the arc of the receiving surface of the first pipe receiving portion ;
The molding duct receiving part is provided adjacent to the first pipe receiving part on a proximal end side that is closer to the rotational axis than the first pipe receiving part, and the engaging step part is disconnect tool it, characterized in that in the molding duct receiving portion is formed in the first pipe receiving portion side.

A cutting tool comprising: a support part for supporting a material to be cut; a cutting blade for cutting the material to be cut; and an operation part for moving the cutting blade to the support part side,
The support portion is a concave and circular shape that receives a part of the outer periphery of the pipes so as to selectively support cylindrical pipes and moldings and ducts having corners, which are the material to be cut. A pipe receiving portion having an arc-shaped receiving surface, a molding duct receiving portion having an engaging step portion that engages with the corner portion of the molding ducts and receiving the molding ducts, and ,
By the operation of the operation unit, the cutting blade rotates about a rotation axis with respect to the support unit,
The pipe receiving portion includes a first pipe receiving portion on a distal end side which is a side away from the rotation axis, and further on a proximal end side which is closer to the rotation axis side than the molding duct receiving portion. A third pipe receiving portion having an arc-shaped receiving surface is provided adjacent to the molding duct receiving portion, and the arc of the receiving surface of the third pipe receiving portion is the receiving surface of the first pipe receiving portion. Located on the extension of the arc of
The molding duct receiving part is provided adjacent to the first pipe receiving part on a proximal end side that is closer to the rotational axis than the first pipe receiving part, and the engaging step part is in Mall duct receiving portion, said first disconnect the tool you characterized that you have been formed in the pipe receiving portion side.

The pipe receiving portion includes a second pipe receiving portion having an arc-shaped receiving surface in the middle of the molding duct receiving portion, and the arc of the receiving surface of the second pipe receiving portion is the first pipe receiving portion. The cutting tool according to claim 1 , wherein the cutting tool is located on an extension line of the arc of the receiving surface of the portion.

The pipe receiving portion is a third pipe receiving portion having an arc-shaped receiving surface adjacent to the molding duct receiving portion on a proximal end side that is closer to the rotational axis than the molding duct receiving portion. the provided, arc of the receiving surface of the third pipe receiving portion, cut according to claim 1, 2 or 4, characterized in that located on the extension of the arc of the receiving surface of the first pipe receiving portion tool.