JP2006255868A

JP2006255868A - Resin pipe boring tool

Info

Publication number: JP2006255868A
Application number: JP2005080573A
Authority: JP
Inventors: Junichi Yuasa; 淳一湯浅
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2005-03-18
Filing date: 2005-03-18
Publication date: 2006-09-28

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin pipe boring tool capable of efficiently cutting a main pipe and preventing a cut piece from dropping on the main pipe in boring a hole for connecting a branch pipe extending in the oblique direction to the extending direction of the resin-made main pipe. <P>SOLUTION: This resin pipe boring tool 10 bores a hole for connecting the branch pipe 12 extending in the oblique direction to the extending direction of the resin-made main pipe 11. The tool is provided with a cylindrical blade 14a formed at the tip, which is inserted into the branch pipe 12 from the opening end of the branch pipe 12 to face on the pipe wall 13 of the main pipe 11 and cut a cutting object 13a of the pipe wall 13. The tool is composed of a rotating cylinder 14 where a driving shaft 15 is connected to the rear end, a bearing body 16 provided in the branch pipe 12 through the opening end to rotatably support the driving shaft 15, and a fixed plate part 17 where the driving shaft 15 is inserted which is fixed to the opening end of the branch pipe 2 to hold the branch pipe 12 wherein the outside diameter of the rotating cylinder 14 is increased at the part of the cylindrical blade 14a more than at the remaining part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、樹脂製の本管に穴を開けるための樹脂管穿孔具の改良に関する。 The present invention relates to an improvement of a resin tube punch for making a hole in a resin main tube.

従来から、樹脂製の本管の延びる方向に対して斜め方向に延びる支管を接続するための穴を穿孔する樹脂管穿孔具が知られている（例えば、特許文献１参照。）。 2. Description of the Related Art Conventionally, there has been known a resin tube punch for punching a hole for connecting a branch tube extending in an oblique direction with respect to a direction in which a resin main tube extends (see, for example, Patent Document 1).

図１はその樹脂管穿孔具による穴開け作業の一例を示し、この図１において、１は樹脂製の本管、２はこの本管に接続されるべき支管、３は樹脂管穿孔具（いわゆるホルソー）である。 FIG. 1 shows an example of a drilling operation using the resin pipe punching tool. In FIG. 1, 1 is a resin main pipe, 2 is a branch pipe to be connected to the main pipe, 3 is a resin pipe punching tool (so-called Horso).

その樹脂管穿孔具３は、支管２の内部に挿入される回転筒４と駆動軸（シャフト）５とを有する。その回転筒４の先端には円筒刃部６が形成され、回転筒の中央にはキリ７が設けられている。 The resin tube punch 3 includes a rotating cylinder 4 and a drive shaft (shaft) 5 inserted into the branch tube 2. A cylindrical blade portion 6 is formed at the tip of the rotating cylinder 4, and a drill 7 is provided at the center of the rotating cylinder.

本管１の延びる方向に対して支管２の延びる方向を例えば約４５度の角度で接続する場合、支管２の内部に樹脂管穿孔具３を挿入し、回転筒４を回転させて本管１の切断対象箇所１ａを切断する際、キリ７が切断対象箇所１ａの管壁に刺さらず、キリ穴が形成されない。 When the extending direction of the branch pipe 2 is connected to the extending direction of the main pipe 1 at an angle of about 45 degrees, for example, the resin pipe punching tool 3 is inserted into the branch pipe 2 and the rotating cylinder 4 is rotated to rotate the main pipe 1. When cutting the cutting target location 1a, the drill 7 does not pierce the tube wall of the cutting target location 1a, and no drill hole is formed.

そこで、キリ７の先端の角度を図２に示すように３０度以下の角度にすることが考えられ、このようにキリ７の先端の角度を鋭くすると、キリ７が切断対象箇所１ａの管壁に刺さり、キリ穴を切断対象箇所１ａの管壁に開けることは可能であり、また、図３に示すように、キリ７の回転筒４からの突き出し量Ｌを、回転筒の外径Ｄに対して、Ｄ／（２sin
θ）に設定すると、キリ７による穴開けと同時に回転筒４による切断が開始されるので、キリ７による穴開けと切断対象箇所１ａとの時間差がなく、切断片１ａ’が本管１内に落下するのを防止できる。 Therefore, it is conceivable to set the angle of the tip of the drill 7 to an angle of 30 degrees or less as shown in FIG. 2, and when the angle of the tip of the drill 7 is sharpened in this way, the drill 7 becomes a tube wall of the portion 1a to be cut. It is possible to open a drill hole in the tube wall of the portion 1a to be cut, and, as shown in FIG. 3, the protrusion amount L of the drill 7 from the rotating cylinder 4 is set to the outer diameter D of the rotating cylinder. In contrast, D / (2sin
When θ is set, since the cutting by the rotating cylinder 4 is started simultaneously with the drilling by the drill 7, there is no time difference between the drilling by the drill 7 and the portion 1 a to be cut, and the cut piece 1 a ′ is in the main pipe 1. Can prevent falling.

というのは、これよりもキリ７の突き出し量を長くすると、キリ７が本管１の切断対象箇所１ａに当たってから円筒刃部６による切断が開始されるまで、時間差があるため穿孔作業効率が低下し、キリ７を回転筒４よりも奥に設定すると、円筒刃部６による切断が始まってからキリ７による穴開けが始まるので、切断片１ａ’が本管１の内部に落下するおそれがあるからである。 This is because if the protrusion amount of the drill 7 is made longer than this, the drilling work efficiency is lowered because there is a time difference from when the drill 7 hits the cutting target portion 1a of the main pipe 1 until the cutting by the cylindrical blade portion 6 is started. However, if the drill 7 is set deeper than the rotating cylinder 4, since the drilling by the drill 7 starts after the cutting by the cylindrical blade portion 6 starts, the cut piece 1 a ′ may fall into the main pipe 1. Because.

このように、従来の樹脂穿孔具３では、樹脂製の本管の延びる方向に対して斜め方向に延びる支管２を接続するための穴を穿孔するのに不都合である。
特開平９−２２５７２０号公報 Thus, the conventional resin punch 3 is inconvenient for drilling a hole for connecting the branch pipe 2 extending in an oblique direction with respect to the extending direction of the resin main pipe.
JP-A-9-225720

そこで、図４に示すように、キリ７の代わりに回転筒４内に先端が鋭利なピン８を設け、ピン８により切断対象箇所を串刺しにする構成とすることが考えられる。 Therefore, as shown in FIG. 4, it can be considered that a pin 8 having a sharp tip is provided in the rotary cylinder 4 instead of the drill 7 and the portion to be cut is skewered by the pin 8.

しかしながら、回転筒４と支管２の内径とが同径であるため、支管２の内壁と回転筒４との間で摩擦が生じ、切断作業効率が芳しくないという問題がある。また、駆動軸５が穿孔作業中に撓んで、回転筒４が支管２の管壁に接触して摩擦が増大するという問題もある。 However, since the rotary cylinder 4 and the inner diameter of the branch pipe 2 are the same diameter, there is a problem that friction occurs between the inner wall of the branch pipe 2 and the rotary cylinder 4 and the cutting work efficiency is not good. There is also a problem that the drive shaft 5 is bent during the drilling operation, and the rotating cylinder 4 comes into contact with the tube wall of the branch tube 2 to increase the friction.

本発明は、上記の事情に鑑みて為されたもので、樹脂製の本管の延びる方向に対して斜め方向に延びる支管を接続するための穴を穿孔するに際して、効率良く本管を切断できると共に切断片の本管への落下を防止できる樹脂管穿孔具を提供することを目的とする。 The present invention has been made in view of the above circumstances, and can efficiently cut a main pipe when drilling a hole for connecting a branch pipe extending in an oblique direction with respect to a direction in which a resin main pipe extends. Another object of the present invention is to provide a resin tube punch that can prevent a cut piece from dropping into the main pipe.

請求項１に記載の発明は、樹脂製の本管の延びる方向に対して斜め方向に延びる支管を接続するための穴を穿孔する樹脂管穿孔具であって、前記支管の開口端部から支管内に挿入されかつ前記本管の管壁に臨まされて該管壁の切断対象箇所を切断する円筒刃部が先端に形成されしかも後端に駆動軸が連結された回転筒と、前記開口端部を通じて支管内に設けられて前記駆動軸を回転可能に支持するベアリング体と、前記駆動軸が挿通されかつ前記支管の開口端部に固定されて該支管を把持する固定盤部とからなり、前記回転筒の外径は前記円筒刃部の部分が残余の部分に対して拡径されていることを特徴とする。 The invention according to claim 1 is a resin pipe punching tool for drilling a hole for connecting a branch pipe extending in an oblique direction with respect to a direction in which a resin main pipe extends, and is supported from an opening end of the branch pipe. A rotating cylinder having a cylindrical blade portion formed at a tip thereof, which is inserted into a pipe and faces the pipe wall of the main pipe and cuts a cutting target portion of the pipe wall, and a driving shaft is connected to a rear end; and the opening end A bearing body that is provided in the branch pipe through the section and rotatably supports the drive shaft, and a fixed platen portion through which the drive shaft is inserted and fixed to the opening end of the branch pipe to grip the branch pipe, The outer diameter of the rotating cylinder is characterized in that the cylindrical blade portion is expanded in diameter relative to the remaining portion.

請求項２に記載の発明は、前記回転筒の内周壁面には前記円筒刃部によって切断された切断片を支承する支承部が形成されていることを特徴とする請求項１に記載の樹脂管穿孔具である。 According to a second aspect of the present invention, there is provided the resin according to the first aspect, wherein a support portion for supporting a cut piece cut by the cylindrical blade portion is formed on an inner peripheral wall surface of the rotary cylinder. It is a tube punch.

請求項３に記載の発明は、前記支承部が螺旋状の係止突起であることを特徴とする請求項２に記載の樹脂管穿孔具である。 According to a third aspect of the present invention, in the resin pipe punching device according to the second aspect, the support portion is a helical locking projection.

本発明によれば、樹脂製の本管の延びる方向に対して斜め方向に延びる支管を接続するための穴を穿孔するに際して、効率良く本管を切断できると共に切断片の本管への落下を防止できる。 According to the present invention, when drilling a hole for connecting a branch pipe extending in an oblique direction with respect to the direction in which the resin main pipe extends, the main pipe can be cut efficiently and the cut piece can be dropped onto the main pipe. Can be prevented.

とくに、請求項１に記載の発明によれば、円筒刃部の部分を拡径して本管の切断対象箇所を切断するので、回転筒と支管の内壁との摩擦を小さくできる。更に、樹脂管穿孔具の回転筒に対して支管の位置決めを行っているので、駆動軸の撓みを防止でき、安定して穿孔作業を行うことができる。 In particular, according to the first aspect of the present invention, the diameter of the cylindrical blade portion is expanded to cut the portion to be cut of the main pipe, so that the friction between the rotating cylinder and the inner wall of the branch pipe can be reduced. Further, since the branch pipe is positioned with respect to the rotating cylinder of the resin pipe punch, the drive shaft can be prevented from being bent, and the drilling operation can be performed stably.

また、請求項２、請求項３に記載の発明によれば、キリやピンを設けなくとも本管の切断片の落下を防止できるという効果を奏する。 Moreover, according to the invention of Claim 2 and Claim 3, even if it does not provide a drill and a pin, there exists an effect that the fall of the cut piece of a main pipe | tube can be prevented.

以下に、本発明に係わる樹脂管穿孔具の発明の実施の形態を図面を参照しつつ説明する。 Embodiments of a resin tube punch according to the present invention will be described below with reference to the drawings.

図５は本発明に係わる樹脂管穿孔具１０の一例を示す図であって、この図５において、符号１１は本管、符号１２は支管である。支管１２はその本管１１への接続端にフランジ部１２ａを有する。 FIG. 5 is a view showing an example of the resin tube punch 10 according to the present invention. In FIG. 5, reference numeral 11 denotes a main pipe, and reference numeral 12 denotes a branch pipe. The branch pipe 12 has a flange portion 12 a at the connection end to the main pipe 11.

本管１１、支管１２は樹脂製であり、支管１２は本管１１の延びる方向に対して斜め方向に延びるようにして本管１１の管壁１３に接続されるものであり、この図５では、管壁１３の符号１３ａで示す箇所が切断対象箇所であり、この切断対象箇所１３ａが樹脂管穿孔具１０によって切断されて穴を開けられるものである。 The main pipe 11 and the branch pipe 12 are made of resin, and the branch pipe 12 is connected to the pipe wall 13 of the main pipe 11 so as to extend obliquely with respect to the direction in which the main pipe 11 extends. The portion indicated by reference numeral 13a on the tube wall 13 is a portion to be cut, and this portion to be cut 13a is cut by the resin tube punch 10 to make a hole.

その樹脂管穿孔具１０は回転筒１４と駆動軸１５とベアリング体１６と固定盤部１７とから大略構成される。 The resin tube punch 10 is generally composed of a rotating cylinder 14, a drive shaft 15, a bearing body 16, and a fixed platen portion 17.

回転筒１４は支管１２の開口端部１８から支管１２内に挿入されかつ本管１１の管壁１３に臨まされて管壁１３の切断対象箇所１３ａを切断する円筒刃部１４ａが先端に形成されている。その回転筒１４の後端にはボルト等の締結部材１８’により駆動軸１５が連結されている。 The rotary cylinder 14 is inserted into the branch pipe 12 from the open end 18 of the branch pipe 12 and faces the pipe wall 13 of the main pipe 11, and a cylindrical blade part 14 a that cuts the cutting target portion 13 a of the pipe wall 13 is formed at the tip. ing. A drive shaft 15 is connected to a rear end of the rotating cylinder 14 by a fastening member 18 ′ such as a bolt.

ベアリング体１６は内輪部１９と外輪部２０とボール２１とからなり、内輪部１９は駆動軸１５を回転可能に支承し、外輪部２０は支管１２の内周壁面にその軸方向に摺動可能に当接されている。そのベアリング体１６は支管１２の開口端部１８を通じて支管１２内に設けられる。 The bearing body 16 includes an inner ring portion 19, an outer ring portion 20, and a ball 21. The inner ring portion 19 rotatably supports the drive shaft 15, and the outer ring portion 20 is slidable in the axial direction on the inner peripheral wall surface of the branch pipe 12. It is in contact with. The bearing body 16 is provided in the branch pipe 12 through the open end 18 of the branch pipe 12.

固定盤部１７には駆動軸１５が挿通されて支管１２の開口端部１８に固定され、固定盤部１７はこの支管１２を把持する役割を果たす。 A drive shaft 15 is inserted into the fixed platen portion 17 and fixed to the open end 18 of the branch pipe 12, and the fixed platen portion 17 plays a role of holding the branch pipe 12.

回転筒１４の外径は円筒刃部１４ａの部分が残余の部分に対して拡径されて、支管１２の内径と略同径とされ、残余の部分は支管１２の内径に対して若干縮径されている。その回転筒１４には円筒刃部１４ａの形成箇所から内部に向かって、螺旋状の係止突起１４ｂと係止溝１４ｃとが形成され、図６に示すように、切断片１３ａ’はこの螺旋状の係止突起１４ｂと係止溝１４ｃとにより、回転筒１４の内部に支承され、螺旋状の係止突起１４ｂと係止溝１４ｃとは、切断片を支承する支承部としての役割を果たす。 The outer diameter of the rotating cylinder 14 is such that the portion of the cylindrical blade portion 14 a is enlarged with respect to the remaining portion, and is approximately the same diameter as the inner diameter of the branch tube 12, and the remaining portion is slightly reduced in diameter relative to the inner diameter of the branch tube 12. Has been. A spiral locking projection 14b and a locking groove 14c are formed on the rotating cylinder 14 from the location where the cylindrical blade portion 14a is formed to the inside, and as shown in FIG. Is supported inside the rotary cylinder 14 by a cylindrical locking projection 14b and a locking groove 14c, and the helical locking projection 14b and the locking groove 14c serve as a support portion for supporting the cut piece. .

この発明の実施例によれば、支管１２を把持してかつ支管の内周壁面との摩擦を小さくして穿孔作業を行うことができるので、穿孔時間の短縮を図ることができ、また、キリやピンを回転筒１４に設けることなく切断片の落下を防止できる。 According to the embodiment of the present invention, since the drilling operation can be performed by holding the branch pipe 12 and reducing the friction with the inner peripheral wall surface of the branch pipe, the drilling time can be shortened. It is possible to prevent the cut piece from falling without providing a pin or a pin on the rotating cylinder 14.

また、回転筒１４の内部に引っかかった切断片は、回転筒１４と駆動軸との連結を解除して、切断片を取り除くことができるので、その除去も容易である。 Moreover, since the cut piece caught inside the rotary cylinder 14 can be removed by releasing the connection between the rotary cylinder 14 and the drive shaft, the cut piece can be easily removed.

従来の樹脂管穿孔具の一例を示す断面図である。It is sectional drawing which shows an example of the conventional resin pipe punch. 図１に示すキリの先端角度を３０度以下の鋭角にした状態を示す部分図である。FIG. 2 is a partial view showing a state where the tip angle of the drill shown in FIG. 1 is an acute angle of 30 degrees or less. 図１に示すキリの突き出し量の説明図である。It is explanatory drawing of the protrusion amount of the drill shown in FIG. 図１に示すキリの代わりにピンを用いた例を示す部分断面図である。It is a fragmentary sectional view which shows the example which used the pin instead of the drill shown in FIG. 本発明に係わる樹脂管穿孔具の一例を示す断面図である。It is sectional drawing which shows an example of the resin pipe punching tool concerning this invention. 図５に示す樹脂管穿孔具の作用を説明するための断面図である。It is sectional drawing for demonstrating the effect | action of the resin pipe | tube punch shown in FIG.

符号の説明Explanation of symbols

１０…樹脂管穿孔具
１１…本管
１２…支管
１３…管壁
１４…回転筒
１５…駆動軸
１６…ベアリング体
１７…固定盤部
１４ａ…円筒刃部 DESCRIPTION OF SYMBOLS 10 ... Resin pipe punch 11 ... Main pipe 12 ... Branch pipe 13 ... Pipe wall 14 ... Rotating cylinder 15 ... Drive shaft 16 ... Bearing body 17 ... Fixed disk part 14a ... Cylindrical blade part

Claims

樹脂製の本管の延びる方向に対して斜め方向に延びる支管を接続するための穴を穿孔する樹脂管穿孔具であって、
前記支管の開口端部から支管内に挿入されかつ前記本管の管壁に臨まされて該管壁の切断対象箇所を切断する円筒刃部が先端に形成されしかも後端に駆動軸が連結された回転筒と、前記開口端部を通じて支管内に設けられて前記駆動軸を回転可能に支持するベアリング体と、前記駆動軸が挿通されかつ前記支管の開口端部に固定されて該支管を把持する固定盤部とからなり、前記回転筒の外径は前記円筒刃部の部分が残余の部分に対して拡径されていることを特徴とする樹脂管穿孔具。 A resin tube punch for drilling a hole for connecting a branch tube extending in an oblique direction with respect to the extending direction of a resin main tube,
A cylindrical blade that is inserted into the branch pipe from the opening end of the branch pipe and faces the pipe wall of the main pipe and cuts the cutting target portion of the pipe wall is formed at the tip, and a drive shaft is connected to the rear end. A rotating cylinder, a bearing body provided in the branch pipe through the opening end and rotatably supporting the drive shaft, and the drive shaft is inserted and fixed to the opening end of the branch pipe to hold the branch pipe A resin tube punch, wherein the outer diameter of the rotating cylinder is larger than the remaining portion of the cylindrical blade portion.

前記回転筒の内周壁面には前記円筒刃部によって切断された切断片を支承する支承部が形成されていることを特徴とする請求項１に記載の樹脂管穿孔具。 The resin tube punch according to claim 1, wherein a support portion for supporting a cut piece cut by the cylindrical blade portion is formed on an inner peripheral wall surface of the rotating cylinder.

前記支承部が螺旋状の係止突起であることを特徴とする請求項２に記載の樹脂管穿孔具。 The resin pipe punching device according to claim 2, wherein the support portion is a helical locking projection.