JP6178202B2

JP6178202B2 - Cutting tool for protective tube

Info

Publication number: JP6178202B2
Application number: JP2013210568A
Authority: JP
Inventors: 高橋　淳二; 淳二高橋
Original assignee: Mirai Kogyo KK
Current assignee: Mirai Kogyo KK
Priority date: 2013-10-07
Filing date: 2013-10-07
Publication date: 2017-08-09
Anticipated expiration: 2033-10-07
Also published as: JP2015073642A

Description

この発明は、断面略長円形状の保護管を切断する、保護管用の切断工具に関するものである。 The present invention relates to a cutting tool for a protective tube that cuts a protective tube having a substantially oval cross section.

従来、断面略長円形状のコルゲート管を切断する、切断工具があった（例えば、特許文献１参照）。図１６に示すように、この切断工具２１は、Ｃ字状の拡大頭部２２ａを有するカッタ本体２２を備えていた。このカッタ本体２２の拡大頭部２２ａは、その内側の空間が、コルゲート管２０が受け入れられる受入孔２３となり、対向する両端間が、コルゲート管２０を受入孔２３に挿入するための挿入口２４となっていた。そして、挿入口２４には、第１切刃２５が設けられ、受入孔２３には、直状の第２切刃２６が設けられた。そこで、コルゲート管２０を、挿入口２４に通すことで、コルゲート管２０の両側壁部２０ａ、２０ａが、第１切刃２５によって切断された。そして、受入孔２３に受け入れられたコルゲート管２０に対し、切断工具２１を回動することで、コルゲート管２０の両端湾曲壁部２０ｂ、２０ｂが、第２切刃２６によって切断された。 Conventionally, there has been a cutting tool for cutting a corrugated tube having a substantially oval cross section (see, for example, Patent Document 1). As shown in FIG. 16, the cutting tool 21 was provided with a cutter body 22 having a C-shaped enlarged head 22a. The enlarged head portion 22a of the cutter body 22 has an inner space serving as a receiving hole 23 in which the corrugated tube 20 is received, and between opposite ends, an insertion port 24 for inserting the corrugated tube 20 into the receiving hole 23 is provided. It was. The insertion opening 24 is provided with a first cutting edge 25, and the receiving hole 23 is provided with a straight second cutting edge 26. Therefore, the corrugated tube 20 is passed through the insertion port 24, whereby both side walls 20 a and 20 a of the corrugated tube 20 are cut by the first cutting edge 25. Then, by turning the cutting tool 21 with respect to the corrugated tube 20 received in the receiving hole 23, both end curved walls 20 b and 20 b of the corrugated tube 20 were cut by the second cutting blade 26.

特開平１０−３２８４４０号公報Japanese Patent Laid-Open No. 10-328440

ところで、前記従来の切断工具２１にあっては、第２切刃２６（第２刃部）が、拡大頭部２２ａの内側に大きく露出していた。このため、作業者は、その露出した第２切刃２６に注意を払ってコルゲート管２０（保護管）の切断作業する必要があり、面倒であった。 By the way, in the said conventional cutting tool 21, the 2nd cutting blade 26 (2nd blade part) was exposed largely inside the expansion head 22a. For this reason, the operator needs to pay attention to the exposed second cutting edge 26 to cut the corrugated tube 20 (protective tube), which is troublesome.

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、第２刃部に注意を払う必要がなく、切断作業を円滑に進めることができる、保護管用の切断工具を提供することにある。 The present invention has been made in order to solve the above-described conventional drawbacks, and the object of the present invention is to protect the second cutting portion without paying attention and to facilitate the cutting operation. It is to provide a cutting tool for a pipe.

この発明に係る保護管用の切断工具は、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保護管用の切断工具は、断面略長円形状の保護管を切断する、切断工具である。この切断工具は、工具本体と、その工具本体に固定される第１の刃体および第２の刃体と、カバー体とを備える。ここで、前記工具本体は、前記保護管が貫通可能な貫通部と、その貫通部に対し前記保護管をその断面略長円形状の幅広方向の側から出し入れ可能な開口部とを有する。前記第１の刃体の刃部である第１刃部は、前記開口部に突出して、その開口部を前記保護管が通ることでその保護管の断面略長円形状の幅狭方向の側にある第１の周壁を切断する。前記第２の刃体の刃部である第２刃部は、前記貫通部に突出して、その貫通部を貫通する前記保護管が前記工具本体に対して相対的に回動することでその保護管の断面略長円形状の幅広方向の側にある第２の周壁を切断する。また、前記カバー体は、前記貫通部に設けられ、その貫通部の軸心方向に垂直な面に沿って移動可能であって、その移動により、前記カバー体は、前記第２刃部よりも前記貫通部の中央側に突出する第１移動域と、前記第２刃部よりも前記貫通部の中央側に突出することなく前記第２刃部を前記貫通部の中央側に露出させる第２移動域とに渡って移動する。そして、前記カバー体は、前記第１移動域中に、前記貫通部に対し、前記保護管を、前記開口部を通じて出し入れ可能とする、出し入れ位置を有する。そして、前記カバー体が前記出し入れ位置にあるときに前記開口部から前記貫通部に挿入された前記保護管に対し、前記工具本体を回動させると、その回動に連動して、前記カバー体は、前記工具本体に対して前記第１移動域と前記第２移動域とに渡って移動するとともに、その第２移動域にて前記第２刃部が前記保護管の第２の周壁を切断する。 The cutting tool for a protective tube according to the present invention has the following configuration in order to achieve the object. That is,
A cutting tool for a protective tube according to the first aspect of the present invention is a cutting tool for cutting a protective tube having a substantially oval cross section. The cutting tool includes a tool body, a first blade body and a second blade body fixed to the tool body, and a cover body. Here, the tool main body has a penetrating portion through which the protective tube can penetrate, and an opening through which the protective tube can be taken in and out from the side in the wide direction having a substantially oval cross section. The first blade portion, which is the blade portion of the first blade body, protrudes into the opening, and the protective tube passes through the opening so that the protective tube has a substantially oval cross-sectional side in the narrow direction. The 1st surrounding wall in is cut | disconnected. The second blade portion, which is the blade portion of the second blade body, protrudes into the penetrating portion, and the protection tube passing through the penetrating portion rotates relative to the tool body to protect the second blade portion. A second peripheral wall on the side of the tube having a substantially oval cross section in the wide direction is cut. Further, the cover body is provided in the penetrating portion and is movable along a plane perpendicular to the axial direction of the penetrating portion, and by the movement, the cover body is more than the second blade portion. A first movement region projecting toward the center side of the penetrating portion; and a second region exposing the second blade portion to the center side of the penetrating portion without projecting toward the center side of the penetrating portion than the second blade portion. Move across the moving area. And the said cover body has an in / out position which enables the said protective tube to be withdrawn / inserted with respect to the said penetration part through the said opening part in the said 1st movement area. When the tool body is rotated with respect to the protective tube inserted into the through portion from the opening when the cover body is in the loading / unloading position, the cover body is interlocked with the rotation. Moves with respect to the tool body over the first movement area and the second movement area, and the second blade section cuts the second peripheral wall of the protective tube in the second movement area. To do.

この切断工具によると、工具本体は、保護管が貫通可能な貫通部と、その貫通部に対し保護管を出し入れ可能な開口部とを有している。ここにおいて、開口部には、保護管の断面略長円形状の幅狭方向の側にある第１の周壁を切断する第１刃部が突出し、貫通部には、保護管の断面略長円形状の幅広方向の側にある第２の周壁を切断する第２刃部が突出している。そして、切断工具は、貫通部に、カバー体を備え、そのカバー体は、貫通部の軸心方向に垂直な面に沿って移動することで、第２刃部よりも貫通部の中央側に突出する第１移動域と、第２刃部よりも貫通部の中央側に突出することなく第２刃部を貫通部の中央側に露出させる第２移動域とに渡って移動する。そこで、この切断工具により、保護管を切断するには、カバー体を第１移動域中の出し入れ位置にして、保護管がその断面略長円形状の幅広方向の側から開口部を通って貫通部に入るように、切断工具を進める。このとき、保護管の断面略長円形状の幅狭方向の側にある第１の周壁が、開口部に突出する第１刃部によって切断される。次に、保護管が工具本体に対して相対的に回動するように、切断工具を回動する。これにより、保護管の断面略長円形状の幅広方向の側にある第２の周壁が、貫通部に突出する第２刃部によって切断される。ここで、カバー体は、切断工具の回動に連動して第２移動域に移動する。次いで、保護管の断面略長円形状の幅広方向の側が開口部側を向くように、切断工具の回動位置を定めて、切断工具を保護管から後退させることで、保護管は、貫通部から開口部を通って外に出ることができる。ここで、カバー体は、切断工具の回動に連動して出し入れ位置に移動する。こうして、この切断工具により、保護管の断面略長円形状の幅狭方向の側にある第１の周壁および幅広方向の側にある第２の周壁を切断することができる。そして、保護管を工具本体の貫通部に入れる際とか、保護管を貫通部から出す際には、カバー体は、第１移動域にあり、第２刃部よりも貫通部の中央側に突出しているため、この第２刃部に注意を払う必要がない。 According to this cutting tool, the tool body has a penetrating part through which the protective tube can penetrate and an opening part through which the protective tube can be taken in and out. Here, a first blade portion that cuts the first peripheral wall on the narrow-width side of the protective tube having a substantially oval cross section protrudes from the opening, and the through tube has a substantially oval cross section of the protective tube. The 2nd blade part which cut | disconnects the 2nd surrounding wall in the width direction side of a shape protrudes. The cutting tool includes a cover body in the penetrating portion, and the cover body moves along a plane perpendicular to the axial direction of the penetrating portion so that it is closer to the center of the penetrating portion than the second blade portion. It moves across the first moving area that protrudes and the second moving area that exposes the second blade part to the center side of the penetrating part without protruding to the center side of the penetrating part rather than the second blade part. Therefore, in order to cut the protective tube with this cutting tool, the cover body is placed in the first moving zone in and out, and the protective tube penetrates through the opening from the wide side of the substantially oval cross section. Advance the cutting tool to enter the part. At this time, the first peripheral wall on the narrow-width side of the protective tube having a substantially oval cross section is cut by the first blade portion protruding from the opening. Next, the cutting tool is rotated so that the protective tube rotates relative to the tool body. As a result, the second peripheral wall on the side of the protective tube having a substantially oval cross-section in the wide direction is cut by the second blade portion protruding from the through portion. Here, the cover body, it moves to the second transfer zone in conjunction with the rotation of the disconnect tool. Next, the rotation position of the cutting tool is determined so that the widthwise side of the protective tube having a substantially oval cross section faces the opening side, and the cutting tool is retracted from the protective tube so that the protective tube can be Can go out through the opening. Here, the cover body, it moves to the out position with the rotation of the disconnect tool. Thus, with this cutting tool, the first peripheral wall on the narrow side and the second peripheral wall on the wide direction side of the protective tube having a substantially oval cross section can be cut. When the protective tube is inserted into the penetrating portion of the tool body or when the protective tube is taken out of the penetrating portion, the cover body is in the first movement area and protrudes toward the center of the penetrating portion from the second blade portion. Therefore, it is not necessary to pay attention to the second blade portion.

また、請求項２に記載の発明に係る保護管用の切断工具は、断面略長円形状の保護管を切断する、切断工具である。この切断工具は、工具本体と、その工具本体に固定される第１の刃体および第２の刃体と、カバー体とを備える。ここで、前記工具本体は、前記保護管が貫通可能な貫通部と、その貫通部に対し前記保護管をその断面略長円形状の幅広方向の側から出し入れ可能な開口部とを有する。前記第１の刃体の刃部である第１刃部は、前記開口部に突出して、その開口部を前記保護管が通ることでその保護管の断面略長円形状の幅狭方向の側にある第１の周壁を切断する。前記第２の刃体の刃部である第２刃部は、前記貫通部に突出して、その貫通部を貫通する前記保護管が前記工具本体に対して相対的に回動することでその保護管の断面略長円形状の幅広方向の側にある第２の周壁を切断する。また、前記カバー体は、前記貫通部に設けられ、その貫通部の軸心方向に垂直な面に沿って移動可能であって、その移動により、前記カバー体は、前記第２刃部よりも前記貫通部の中央側に突出する第１移動域と、前記第２刃部よりも前記貫通部の中央側に突出することなく前記第２刃部を前記貫通部の中央側に露出させる第２移動域とに渡って移動する。そして、前記カバー体は、前記第１移動域中に、前記貫通部に対し、前記保護管を、前記開口部を通じて出し入れ可能とする、出し入れ位置を有する。また、前記カバー体は、前記工具本体によって、前記貫通部の軸心回りに回動可能に支持される。そして、前記カバー体は、前記保護管の外周に係合する係合部を有する。そこで、前記カバー体が前記出し入れ位置にあるときに前記開口部から前記貫通部に挿入された前記保護管に対し、前記工具本体を回動させると、前記係合部が前記保護管の外周に係合して前記カバー体がその保護管側に留まることで、そのカバー体は、前記工具本体に対して相対的に回動して前記第１移動域と前記第２移動域とに渡って移動するとともに、その第２移動域にて前記第２刃部が前記保護管の第２の周壁を切断する。すなわち、この切断工具にあっては、工具本体の回動に連動して、カバー体は、第１移動域と第２移動域とに渡って移動し、第２移動域にて、露出する第２刃部により保護管の第２の周壁が切断される。
この切断工具によると、工具本体は、保護管が貫通可能な貫通部と、その貫通部に対し保護管を出し入れ可能な開口部とを有している。ここにおいて、開口部には、保護管の断面略長円形状の幅狭方向の側にある第１の周壁を切断する第１刃部が突出し、貫通部には、保護管の断面略長円形状の幅広方向の側にある第２の周壁を切断する第２刃部が突出している。そして、切断工具は、貫通部に、カバー体を備え、そのカバー体は、貫通部の軸心方向に垂直な面に沿って移動することで、第２刃部よりも貫通部の中央側に突出する第１移動域と、第２刃部よりも貫通部の中央側に突出することなく第２刃部を貫通部の中央側に露出させる第２移動域とに渡って移動する。そこで、この切断工具により、保護管を切断するには、カバー体を第１移動域中の出し入れ位置にして、保護管がその断面略長円形状の幅広方向の側から開口部を通って貫通部に入るように、切断工具を進める。このとき、保護管の断面略長円形状の幅狭方向の側にある第１の周壁が、開口部に突出する第１刃部によって切断される。次に、保護管が工具本体に対して相対的に回動するように、切断工具を回動する。これにより、保護管の断面略長円形状の幅広方向の側にある第２の周壁が、貫通部に突出する第２刃部によって切断される。ここで、カバー体は、切断工具の回動に連動して第２移動域に移動する。次いで、保護管の断面略長円形状の幅広方向の側が開口部側を向くように、切断工具の回動位置を定めて、切断工具を保護管から後退させることで、保護管は、貫通部から開口部を通って外に出ることができる。ここで、カバー体は、切断工具の回動に連動して出し入れ位置に移動する。こうして、この切断工具により、保護管の断面略長円形状の幅狭方向の側にある第１の周壁および幅広方向の側にある第２の周壁を切断することができる。そして、保護管を工具本体の貫通部に入れる際とか、保護管を貫通部から出す際には、カバー体は、第１移動域にあり、第２刃部よりも貫通部の中央側に突出しているため、この第２刃部に注意を払う必要がない。 A cutting tool for a protective tube according to the invention described in claim 2 is a cutting tool for cutting a protective tube having a substantially oval cross section. The cutting tool includes a tool body, a first blade body and a second blade body fixed to the tool body, and a cover body. Here, the tool main body has a penetrating portion through which the protective tube can penetrate, and an opening through which the protective tube can be taken in and out from the side in the wide direction having a substantially oval cross section. The first blade portion, which is the blade portion of the first blade body, protrudes into the opening, and the protective tube passes through the opening so that the protective tube has a substantially oval cross-sectional side in the narrow direction. The 1st surrounding wall in is cut | disconnected. The second blade portion, which is the blade portion of the second blade body, protrudes into the penetrating portion, and the protection tube passing through the penetrating portion rotates relative to the tool body to protect the second blade portion. A second peripheral wall on the side of the tube having a substantially oval cross section in the wide direction is cut. Further, the cover body is provided in the penetrating portion and is movable along a plane perpendicular to the axial direction of the penetrating portion, and by the movement, the cover body is more than the second blade portion. A first movement region projecting toward the center side of the penetrating portion; and a second region exposing the second blade portion to the center side of the penetrating portion without projecting toward the center side of the penetrating portion than the second blade portion. Move across the moving area. And the said cover body has an in / out position which enables the said protective tube to be withdrawn / inserted with respect to the said penetration part through the said opening part in the said 1st movement area. Moreover, the said cover body is supported by the said tool main body so that rotation around the axial center of the said penetration part is possible. And the said cover body has an engaging part engaged with the outer periphery of the said protective tube. Therefore, when the tool body is rotated with respect to the protective tube inserted into the through portion from the opening when the cover body is in the loading / unloading position, the engaging portion is placed on the outer periphery of the protective tube. When the cover body is engaged and stays on the protective tube side, the cover body rotates relative to the tool main body and extends over the first movement area and the second movement area. While moving, the second blade section cuts the second peripheral wall of the protective tube in the second movement region. That is, in this cutting tool, the cover body moves across the first movement area and the second movement area in conjunction with the rotation of the tool body, and is exposed in the second movement area. The second peripheral wall of the protective tube is cut by the two blade portions.
According to this cutting tool, the tool body has a penetrating part through which the protective tube can penetrate and an opening part through which the protective tube can be taken in and out. Here, a first blade portion that cuts the first peripheral wall on the narrow-width side of the protective tube having a substantially oval cross section protrudes from the opening, and the through tube has a substantially oval cross section of the protective tube. The 2nd blade part which cut | disconnects the 2nd surrounding wall in the width direction side of a shape protrudes. The cutting tool includes a cover body in the penetrating portion, and the cover body moves along a plane perpendicular to the axial direction of the penetrating portion so that it is closer to the center of the penetrating portion than the second blade portion. It moves across the first moving area that protrudes and the second moving area that exposes the second blade part to the center side of the penetrating part without protruding to the center side of the penetrating part rather than the second blade part. Therefore, in order to cut the protective tube with this cutting tool, the cover body is placed in the first moving zone in and out, and the protective tube penetrates through the opening from the wide side of the substantially oval cross section. Advance the cutting tool to enter the part. At this time, the first peripheral wall on the narrow-width side of the protective tube having a substantially oval cross section is cut by the first blade portion protruding from the opening. Next, the cutting tool is rotated so that the protective tube rotates relative to the tool body. As a result, the second peripheral wall on the side of the protective tube having a substantially oval cross-section in the wide direction is cut by the second blade portion protruding from the through portion. Here, the cover body moves to the second movement area in conjunction with the rotation of the cutting tool. Next, the rotation position of the cutting tool is determined so that the widthwise side of the protective tube having a substantially oval cross section faces the opening side, and the cutting tool is retracted from the protective tube so that the protective tube can be Can go out through the opening. Here, the cover body moves to the loading / unloading position in conjunction with the rotation of the cutting tool. Thus, with this cutting tool, the first peripheral wall on the narrow side and the second peripheral wall on the wide direction side of the protective tube having a substantially oval cross section can be cut. When the protective tube is inserted into the penetrating portion of the tool body or when the protective tube is taken out of the penetrating portion, the cover body is in the first movement area and protrudes toward the center of the penetrating portion from the second blade portion. Therefore, it is not necessary to pay attention to the second blade portion.

また、請求項３に記載の発明に係る保護管用の切断工具は、請求項２に記載の切断工具において、前記係合部は、前記保護管の第１の周壁の両方の外側に嵌合してその保護管を保持する保持部からなる。この切断工具によると、保持部により、切断工具の、保護管に対するがたつきを抑えることができる。このため、切断工具を、正確に保護管の軸心に対して垂直な方向に回動させることができ、保護管の第２の周壁の切断を安定して行うことができる。 According to a third aspect of the present invention, in the cutting tool for a protective tube according to the second aspect of the present invention, in the cutting tool according to the second aspect, the engaging portion is fitted on both outer sides of the first peripheral wall of the protective tube. And a holding portion for holding the protective tube. According to this cutting tool, rattling of the cutting tool with respect to the protective tube can be suppressed by the holding portion. For this reason, the cutting tool can be accurately rotated in a direction perpendicular to the axis of the protective tube, and the second peripheral wall of the protective tube can be stably cut.

また、請求項４に記載の発明に係る保護管用の切断工具は、請求項３に記載の切断工具において、前記保護管は、その周壁に山谷が形成されたコルゲート管からなる。そこで、前記第１の刃体および前記第２の刃体は、前記コルゲート管の山の部分を切断する。そして、前記開口部の口縁には、前記コルゲート管の谷に入り込んでそのコルゲート管の長手方向の移動を阻止する第１係止部が設けられる。また、前記カバー体には、前記コルゲート管の谷に入り込んでそのコルゲート管の長手方向の移動を阻止する第２係止部が設けられる。この切断工具によると、第１係止部および第２係止部により、コルゲート管の長手方向に対する切断工具の位置が定まり、第１の刃体と第２の刃体とで、コルゲート管の同じ山の部分を正確に切断することができる。 According to a fourth aspect of the present invention, there is provided a cutting tool for a protective tube according to the third aspect of the present invention, wherein the protective tube is a corrugated tube having a valley formed on the peripheral wall thereof. Therefore, the first blade body and the second blade body cut a mountain portion of the corrugated tube. And the 1st latching | locking part which enters the trough of the said corrugated pipe | tube and prevents the movement of the corrugated pipe | tube in the longitudinal direction is provided in the opening edge of the said opening part. Further, the cover body is provided with a second locking portion that enters the trough of the corrugated pipe and prevents the corrugated pipe from moving in the longitudinal direction. According to this cutting tool, the position of the cutting tool relative to the longitudinal direction of the corrugated tube is determined by the first locking portion and the second locking portion, and the same corrugated tube is used in the first blade body and the second blade body. The mountain part can be cut accurately.

この発明に係る保護管用の切断工具によれば、第２刃部よりも貫通部の中央側に突出するカバー体を設けることで、第２刃部に注意を払う必要がなく、切断作業を円滑に進めることができる。 According to the cutting tool for a protective tube according to the present invention, by providing the cover body that protrudes to the center side of the penetrating portion from the second blade portion, it is not necessary to pay attention to the second blade portion, and the cutting operation can be smoothly performed. Can proceed.

この発明の一実施の形態の、切断工具の斜視図である。It is a perspective view of a cutting tool of one embodiment of this invention. 同じく、一部分解斜視図である。Similarly, it is a partially exploded perspective view. 同じく、分解斜視図である。Similarly, it is an exploded perspective view. 同じく、平面図である。Similarly, it is a plan view. 同じく、図４におけるＡ−Ａ線による拡大断面図である。Similarly, it is an expanded sectional view by the AA line in FIG. 同じく、図４におけるＢ−Ｂ線による拡大断面図である。Similarly, it is an expanded sectional view by the BB line in FIG. 同じく、カバー体を工具本体に対して９０°回動した平面図である。Similarly, it is the top view which rotated the cover body 90 degrees with respect to the tool main body. 同じく、図７におけるＣ−Ｃ線による拡大断面図である。Similarly, it is an expanded sectional view by CC line in FIG. 同じく、切断工具からカッターを取り出した要部拡大平面図である。Similarly, it is the principal part enlarged plan view which took out the cutter from the cutting tool. 同じく、切断工具を進めて、コルゲート管が開口部を通るときの平面図である。Similarly, it is a top view when a cutting tool is advanced and a corrugated pipe passes through an opening. 同じく、図１０におけるＤ−Ｄ線による拡大断面図である。Similarly, it is an expanded sectional view by the DD line in FIG. 同じく、切断工具をさらに進めて、コルゲート管が貫通部に挿入されたときの平面図である。Similarly, it is a top view when a cutting tool is advanced further and a corrugated pipe is inserted in a penetration part. 同じく、図１２におけるＥ−Ｅ線による拡大断面図である。Similarly, it is an expanded sectional view by the EE line in FIG. 同じく、切断工具を時計回りに９０°回動したときの平面図である。Similarly, it is a top view when a cutting tool is rotated 90 degrees clockwise. 同じく、図１４におけるＦ−Ｆ線による拡大断面図である。Similarly, it is an expanded sectional view by the FF line in FIG. 従来の切断工具を示す、平面図である。It is a top view which shows the conventional cutting tool.

以下、この発明に係る保護管用の切断工具を実施するための形態を図面に基づいて説明する。 EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the cutting tool for protection tubes which concerns on this invention is demonstrated based on drawing.

図１〜図１５は、本発明の一実施の形態を示す。図中符号１は、配線・配管材（配線材または配管材）を示す。２は、前記配線・配管材１を内部に収容する断面略長円形状の保護管を示す。３は、前記保護管２を、内部の配線・配管材１を切断することなく切断する、切断工具を示す。 1 to 15 show an embodiment of the present invention. Reference numeral 1 in the figure indicates wiring / piping material (wiring material or piping material). Reference numeral 2 denotes a protective tube having a substantially oval cross section for accommodating the wiring / piping material 1 therein. 3 shows a cutting tool for cutting the protective tube 2 without cutting the internal wiring / piping material 1.

この切断工具３は、工具本体４と、その工具本体４に固定される第１の刃体５および第２の刃体６と、カバー体７とを備える。ここで、工具本体４は、保護管２が貫通可能な貫通部４ａと、その貫通部４ａに対し保護管２をその断面略長円形状の幅広方向Ｐ２の側から出し入れ可能な開口部４ｂとを有する。 The cutting tool 3 includes a tool body 4, a first blade body 5 and a second blade body 6 fixed to the tool body 4, and a cover body 7. Here, the tool body 4 includes a through portion 4a through which the protective tube 2 can penetrate, and an opening 4b through which the protective tube 2 can be taken in and out of the through portion 4a from the side of the wide direction P2 having a substantially oval cross section. Have

第１の刃体５の刃部である第１刃部５ａは、工具本体４の開口部４ｂに突出して、その開口部４ｂを保護管２が通ることでその保護管２の断面略長円形状の幅狭方向Ｐ１の側にある第１の周壁２ａを切断する。そして、第２の刃体６の刃部である第２刃部６ａは、工具本体４の貫通部４ａに突出して、その貫通部４ａを貫通する保護管２が工具本体４に対して相対的に回動する（詳しくは、相対的に貫通部４ａの軸心回りに回動する）ことでその保護管２の断面略長円形状の幅広方向Ｐ２の側にある第２の周壁２ｂを切断する。 The first blade portion 5a, which is the blade portion of the first blade body 5, protrudes into the opening 4b of the tool body 4, and the protective tube 2 passes through the opening 4b so that the cross section of the protective tube 2 is approximately oval. The first peripheral wall 2a on the narrow width direction P1 side of the shape is cut. And the 2nd blade part 6a which is a blade part of the 2nd blade body 6 protrudes in the penetration part 4a of the tool main body 4, and the protective tube 2 which penetrates the penetration part 4a is relative to the tool main body 4. The second peripheral wall 2b on the side of the width direction P2 having a substantially oval cross section of the protective tube 2 is cut by rotating in the direction of rotation (specifically, rotating around the axis of the through portion 4a). To do.

カバー体７は、貫通部４ａに設けられ、その貫通部４ａの軸心方向に垂直な面に沿って移動可能であって、その移動により、カバー体７は、第２刃部６ａよりも（図示実施の形態においては、第２刃部６ａの少なくとも一方の側面Ｍ（詳しくは、第２刃部６ａの一方の側面Ｍ）を被ってその第２刃部６ａよりも）貫通部４ａの中央側に突出する第１移動域（図４、図６参照）と、第２刃部６ａよりも貫通部４ａの中央側に突出することなく第２刃部６ａを貫通部４ａの中央側に露出させる第２移動域（図７、図８参照）とに渡って移動する。そして、カバー体７は、前記第１移動域中に、貫通部４ａに対し、保護管２を、開口部４ｂを通じて出し入れ可能とする、出し入れ位置（図４参照）を有する。 The cover body 7 is provided in the penetrating portion 4a, and is movable along a surface perpendicular to the axial direction of the penetrating portion 4a. By the movement, the cover body 7 is more than the second blade portion 6a ( In the illustrated embodiment, the center of the penetrating portion 4a is at least one side surface M of the second blade portion 6a (more specifically, than the second blade portion 6a covering the one side surface M of the second blade portion 6a). The first moving area protruding to the side (see FIGS. 4 and 6) and the second blade portion 6a exposed to the center side of the penetrating portion 4a without protruding to the center side of the penetrating portion 4a than the second blade portion 6a It moves over the 2nd movement area (refer to Drawing 7 and Drawing 8) to be made. And the cover body 7 has an insertion / removal position (refer FIG. 4) which enables the protection tube 2 to be withdrawn / inserted with respect to the penetration part 4a through the opening part 4b in the said 1st movement area.

詳細には、カバー体７は、工具本体４によって、貫通部４ａの軸心回りに回動可能に支持される。そして、カバー体７は、保護管２の外周に係合する係合部７ａを有する。そこで、カバー体７が前記出し入れ位置にあるときに開口部４ｂから貫通部４ａに挿入された保護管２に対し、工具本体４を回動させると、係合部７ａが保護管２の外周に係合してカバー体７がその保護管２側に留まることで、そのカバー体７は、工具本体４に対して相対的に回動して前記第１移動域と第２移動域とに渡って移動するとともに、その第２移動域にて第２刃部６ａが保護管２の第２の周壁２ｂを切断する。より詳細には、この係合部７ａは、保護管２の、第１の周壁２ａ、２ａの両方の外側（図示実施の形態においては、第１の周壁２ａ、２ａの両方および第２の周壁２ｂ、２ｂの一方の外側）に嵌合して、その保護管２を保持する保持部７ｂからなる。なお、嵌合の概念には、ちょうど当接するようにして嵌まる場合の他に、圧入ぎみに嵌まる場合とか、僅かに隙間を有して嵌まる場合を含む。 Specifically, the cover body 7 is supported by the tool body 4 so as to be rotatable about the axis of the penetrating portion 4a. The cover body 7 has an engaging portion 7 a that engages with the outer periphery of the protective tube 2. Therefore, when the tool body 4 is rotated with respect to the protective tube 2 inserted into the through portion 4a from the opening 4b when the cover body 7 is in the loading / unloading position, the engaging portion 7a is placed on the outer periphery of the protective tube 2. When the cover body 7 is engaged and stays on the protective tube 2 side, the cover body 7 rotates relative to the tool body 4 and extends over the first movement area and the second movement area. And the second blade portion 6a cuts the second peripheral wall 2b of the protective tube 2 in the second movement region. More specifically, the engaging portion 7a is formed on the outer side of both of the first peripheral walls 2a and 2a of the protective tube 2 (in the illustrated embodiment, both of the first peripheral walls 2a and 2a and the second peripheral wall). 2b and 2b) and a holding portion 7b for holding the protective tube 2. Note that the concept of fitting includes not only the case of fitting so as to contact but also the case of fitting in a press fit, or the case of fitting with a slight gap.

具体的には、配線・配管材１は、配管材、例えば追焚き用とか床暖房用の配管材であって、２本の管１ａ、１ａが並置され、それら管１ａ、１ａがアルミ積層フィルムとかアルミフィルムとかのフィルム１ｂで巻き付けられて形成される（図４参照）。 Specifically, the wiring / piping material 1 is a piping material, for example, a piping material for reheating or floor heating, in which two pipes 1a and 1a are juxtaposed, and these pipes 1a and 1a are aluminum laminated films. Or a film 1b such as an aluminum film (see FIG. 4).

保護管２は、その周壁に山谷が形成されたコルゲート管２０１からなる。そこで、切断工具３における第１の刃体５および第２の刃体６（詳しくは、第１刃部５ａおよび第２刃部６ａ）は、コルゲート管２０１の山２ｃの部分を切断する。 The protective tube 2 is composed of a corrugated tube 201 having a mountain and valley formed on its peripheral wall. Therefore, the first blade body 5 and the second blade body 6 (specifically, the first blade portion 5a and the second blade portion 6a) in the cutting tool 3 cut the crest 2c portion of the corrugated tube 201.

工具本体４は、例えば金属製であって、前記貫通部４ａおよび開口部４ｂが設けられた本体部４０１と、その本体部４０１から延出した柄部４０２とを備える。ここで、本体部４０１は、略Ｃ字状に形成されて、その内側が前記貫通部４ａとなり、その両端間が前記開口部４ｂとなる。そして、開口部４ｂにおいては、その開口部４ｂの口縁に（つまり、本体部４０１の略Ｃ字状に湾曲してなる開放側の端部分に）、コルゲート管２０１の谷２ｄに入り込んでそのコルゲート管２０１の長手方向の移動を阻止する第１係止部４ｃが設けられる。図示実施の形態においては、第１係止部４ｃは、本体部４０１の略Ｃ字状に湾曲してなる開放側の両端部分に設けられ、各端部分において、第１の刃体５を挟むように二つ設けられる。 The tool main body 4 is made of, for example, metal, and includes a main body portion 401 provided with the penetrating portion 4 a and the opening portion 4 b, and a handle portion 402 extending from the main body portion 401. Here, the main body portion 401 is formed in a substantially C shape, and the inside is the through portion 4a, and the end portion is the opening portion 4b. And in the opening part 4b, it enters into the trough 2d of the corrugated pipe 201 at the lip of the opening part 4b (that is, the end part on the open side that is curved in a substantially C shape of the main body part 401). The 1st latching | locking part 4c which prevents the movement of the corrugated pipe | tube 201 in the longitudinal direction is provided. In the illustrated embodiment, the first locking portion 4c is provided at both open end portions of the main body portion 401 that are curved in a substantially C shape, and the first blade body 5 is sandwiched between the end portions. Two are provided.

柄部４０２は、本体部４０１の略Ｃ字の中間位置から、開口部４ｂとは反対側に延びて形成され、この柄部４０２を掴むことで、工具本体４、つまりは切断工具３を操作することができる。また、この柄部４０２には、カッター８が、取り出し可能に収容される。図示実施の形態においては、このカッター８におけるカッター本体８ａには、軸孔８ｘがあけられており、その軸孔８ｘに、柄部４０２に設けられた軸部４ｄが嵌合することで、カッター８は、柄部４０２に対して軸支され、柄部４０２内に収容された収容位置（図４参照）と、柄部４０２から取り出された取出し位置（図９参照）との間を回動可能となっている。 The handle 402 is formed to extend from the substantially C-shaped intermediate position of the main body 401 to the opposite side of the opening 4b, and the tool main body 4, that is, the cutting tool 3 is operated by grasping the handle 402. can do. Moreover, the cutter 8 is accommodated in the handle portion 402 so as to be removable. In the illustrated embodiment, the cutter body 8a of the cutter 8 is provided with a shaft hole 8x, and the shaft portion 4d provided in the handle 402 is fitted into the shaft hole 8x. 8 is pivotally supported with respect to the handle 402 and rotates between an accommodation position (see FIG. 4) accommodated in the handle 402 and an extraction position (see FIG. 9) taken out from the handle 402. It is possible.

このカッター８は、主に、配線・配管材１（詳しくは、配管材）におけるフィルム１ｂを切断するために用いられるものであって、例えば合成樹脂製の前記カッター本体８ａと、そのカッター本体８ａに固定された例えば金属製の刃体８ｂとを備えている（図９参照）。ここで、カッター本体８ａは、先端部分に、フィルム１ｂ等の被切断物を受け入れるスリット８ｃを有する。そして、刃体８ｂは、その刃部８ｄが、スリット８ｃの口元側を向いてスリット８ｃに対し斜めに交差するように延び、かつ、その刃部８ｄの先端８ｅ側が、スリット８ｃの奥側に位置するように配置されている。そして、刃部８ｄの先端８ｅは、スリット８ｃを形成する対向壁Ｑをのり越えることなく、その対向壁Ｑに当接あるいは若干離れて位置している。これにより、フィルム１ｂが、アルミ積層フィルムであったりアルミフィルムであったりしたとき、刃部８ｄの先端８ｅがスリット８ｃの対向壁Ｑをのり越える場合と異なり、ちぎれ易いアルミが、刃部８ｄの先端８ｅ側で細かくちぎれて刃部８ｄの先端８ｅ側とスリット８ｃの対向壁Ｑとの間の先細りの空間８ｆに挟まったまま詰まるのを低減することができる。 The cutter 8 is mainly used for cutting the film 1b in the wiring / piping material 1 (specifically, the piping material). For example, the cutter body 8a made of synthetic resin and the cutter body 8a are used. For example, a metal blade 8b (see FIG. 9). Here, the cutter body 8a has a slit 8c for receiving an object to be cut such as the film 1b at the tip portion. The blade body 8b extends so that the blade portion 8d faces the mouth side of the slit 8c and obliquely intersects the slit 8c, and the tip 8e side of the blade portion 8d is on the back side of the slit 8c. It is arranged to be located. And the front-end | tip 8e of the blade part 8d is located in contact | abutting or some distance away from the opposing wall Q, without passing over the opposing wall Q which forms the slit 8c. Thereby, when the film 1b is an aluminum laminated film or an aluminum film, unlike the case where the tip 8e of the blade portion 8d passes over the opposing wall Q of the slit 8c, the aluminum that is easily torn is removed from the blade portion 8d. It is possible to reduce clogging while being pinched in the tapered space 8f between the tip 8e side of the blade portion 8d and the opposing wall Q of the slit 8c by being broken finely on the tip 8e side.

また、工具本体４は、本体部４０１および柄部４０２を通じてスライスするように分割された二つの分割体（第１の分割体Ｘ１および第２の分割体Ｘ２）からなる。すなわち、第１の分割体Ｘ１は、本体部４０１を構成する略Ｃ字状の第１本体部４ｅと、柄部４０２を構成する第１柄部４ｆとからなり、同様に、第２の分割体Ｘ２は、本体部４０１を構成する略Ｃ字状の第２本体部４ｇと、柄部４０２を構成する第２柄部４ｈとからなる。そして、これら第１の分割体Ｘ１と第２の分割体Ｘ２とは、自身にあけられた取付孔４ｉを連通するビス等の固着具（図示せず）により、互いに連結される。 The tool body 4 includes two divided bodies (a first divided body X1 and a second divided body X2) divided so as to be sliced through the main body portion 401 and the handle portion 402. That is, the first divided body X1 includes a substantially C-shaped first main body portion 4e constituting the main body portion 401 and a first handle portion 4f constituting the handle portion 402. Similarly, the first divided body X1 is divided into the second divided portions. The body X <b> 2 includes a substantially C-shaped second main body portion 4 g constituting the main body portion 401 and a second handle portion 4 h constituting the handle portion 402. And these 1st division body X1 and 2nd division body X2 are mutually connected by fixing tools (not shown), such as a screw | thread which connects the attachment hole 4i opened in self.

そこで、これら第１の分割体Ｘ１と第２の分割体Ｘ２とが（詳しくは、第１本体部４ｅと第２本体部４ｇとが）、前記第１および第２の刃体５、６とカバー体７とを挟み込むようにして支持する。図示実施の形態においては、第１および第２の刃体５、６には、前記取付孔４ｉ、４ｉと連通する孔５ｂ、６ｂがあけられており、これら取付孔４ｉ、４ｉと孔５ｂ、６ｂとをビス等の固着具（図示せず）が貫通することで、第１および第２の刃体５、６は、本体部４０１、つまりは工具本体４に固定される。そして、本体部４０１には、貫通部４ａに臨むとともにカバー体７の外周側が嵌まる溝４ｊが設けられており、カバー体７は、この溝４ｊに案内されて、工具本体４に対して相対的に回動する。 Therefore, the first divided body X1 and the second divided body X2 (specifically, the first main body portion 4e and the second main body portion 4g) are connected to the first and second blade bodies 5, 6 and The cover body 7 is supported so as to be sandwiched. In the illustrated embodiment, the first and second blade bodies 5 and 6 are provided with holes 5b and 6b communicating with the mounting holes 4i and 4i. The mounting holes 4i and 4i and the holes 5b, The first and second blade bodies 5, 6 are fixed to the main body 401, that is, the tool main body 4 by passing a fixing tool (not shown) such as a screw through 6 b. The main body 401 is provided with a groove 4j that faces the penetrating part 4a and that fits the outer peripheral side of the cover body 7. The cover body 7 is guided by the groove 4j and is relative to the tool main body 4. Rotate.

また、この工具本体４には、カバー体７を前記出し入れ位置に保持する掛止め手段９が設けられている。この掛止め手段９は、例えば、カバー体７を弾性的に保持するものであって、図示実施の形態においては、金属製の板ばね９ａからなる。 The tool body 4 is provided with a latching means 9 for holding the cover body 7 in the loading / unloading position. The latching means 9 is, for example, elastically holding the cover body 7 and is made of a metal leaf spring 9a in the illustrated embodiment.

第１の刃体５は、例えば金属製であって、工具本体４における開口部４ｂを挟む両側に設けられる。この第１の刃体５は、基端側に前述の孔５ｂがあけられ、先端部分が、先細となって開口部４ｂに突出している。そこで、この第１の刃体５の先端部分に、開口部４ｂの口元側を向くように前記第１刃部５ａが設けられる。そして、この第１の刃体５の先端部分における、開口部４ｂの奥側は、刃がなく、かつ、凸状に湾曲して形成された、湾曲部５ｃとなっている（図３参照）。 The first blade body 5 is made of metal, for example, and is provided on both sides of the tool body 4 with the opening 4b interposed therebetween. The first blade body 5 has the above-described hole 5b formed on the base end side, and the tip end portion is tapered to project into the opening 4b. Therefore, the first blade portion 5a is provided at the distal end portion of the first blade body 5 so as to face the mouth side of the opening 4b. The back side of the opening 4b at the tip of the first blade body 5 is a curved portion 5c that has no blade and is curved in a convex shape (see FIG. 3). .

第２の刃体６は、例えば金属製であって、工具本体４における貫通部４ａを挟む両側に設けられる。この第２の刃体６は、基端側に前述の孔６ｂがあけられ、先端部分が、横長となって貫通部４ａに突出している。そこで、この第２の刃体６の先端部分に、貫通部４ａの中央側を向くように前記第２刃部６ａが設けられる。なお、図示実施の形態においては、第１の刃体５と第２の刃体６とは、連設部１０を介して一体に形成される。もっとも、これら第１の刃体５と第２の刃体６とは、別個に形成されても構わない。 The 2nd blade body 6 is metal, for example, Comprising: It provides in the both sides which pinch | interpose the penetration part 4a in the tool main body 4. As shown in FIG. The second blade body 6 has the above-described hole 6b formed on the base end side, and a distal end portion which is horizontally long and protrudes from the through portion 4a. Therefore, the second blade portion 6a is provided at the tip portion of the second blade body 6 so as to face the center side of the penetrating portion 4a. In the illustrated embodiment, the first blade body 5 and the second blade body 6 are integrally formed via the connecting portion 10. However, the first blade body 5 and the second blade body 6 may be formed separately.

カバー体７は、例えば金属製であって、互いに対向する対向部７ｃ、７ｃと、それら対向部７ｃ、７ｃを一方で繋ぐ中間部７ｄとで、略Ｕ字状に形成されている。そして、このカバー体７は、その外周が円弧状に形成され、前述したように、工具本体４に対して相対的に回動可能となる。そして、カバー体７は、その略Ｕ字の口元側から、コルゲート管２０１（保護管２）が内部に受け入れられる（つまり、前記出し入れ位置は、カバー体７の略Ｕ字の口元側が、工具本体４の開口部４ｂを向くこととなる回動位置である）。そこで、このカバー体７の内周が、コルゲート管２０１（保護管２）の外周に係合する係合部７ａとなり、また、コルゲート管２０１（保護管２）を保持する保持部７ｂともなる。 The cover body 7 is made of, for example, metal, and is formed in a substantially U shape by facing portions 7c and 7c facing each other and an intermediate portion 7d that connects the facing portions 7c and 7c on one side. The outer periphery of the cover body 7 is formed in an arc shape and can be rotated relative to the tool body 4 as described above. Then, the cover body 7 receives the corrugated tube 201 (protective tube 2) from the substantially U-shaped mouth side (that is, the insertion / extraction position of the cover body 7 is the tool body of the substantially U-shaped mouth side). 4 is a rotation position that faces the opening 4b of the 4). Therefore, the inner periphery of the cover body 7 serves as an engaging portion 7a that engages with the outer periphery of the corrugated tube 201 (protective tube 2), and also serves as a holding portion 7b that holds the corrugated tube 201 (protective tube 2).

そして、このカバー体７には、コルゲート管２０１の谷２ｄに入り込んでそのコルゲート管２０１の長手方向の移動を阻止する第２係止部７ｅが設けられる。詳細には、この第２係止部７ｅは、カバー体７の内周に、段差が形成されるようにその厚みが小となって突出する。そして、前記係合部７ａとか保持部７ｂは、このカバー体７の内周の、段差を構成する段部７ｆからなる。なお、図示実施の形態においては、第２係止部７ｅは、内周全体に渡って形成される。 The cover body 7 is provided with a second locking portion 7e that enters the valley 2d of the corrugated pipe 201 and prevents the corrugated pipe 201 from moving in the longitudinal direction. Specifically, the second locking portion 7e protrudes with a small thickness on the inner periphery of the cover body 7 so that a step is formed. The engaging portion 7a or the holding portion 7b includes a step portion 7f constituting a step on the inner periphery of the cover body 7. In the illustrated embodiment, the second locking portion 7e is formed over the entire inner periphery.

また、カバー体７には、その対向部７ｃに、前記第１移動域にて第２刃部６ａの前方を塞ぐ閉塞片７ｇが、設けられている。詳細には、この閉塞片７ｇは、カバー体７の板面から、少なくとも第２の刃体６の厚みを越える高さとなるよう、突出して形成されており、貫通部４ａの中央側を向く面は、カバー体７の内周（図示実施の形態においては、内周の段部７ｆ）と、面一となって、前記係合部７ａとか保持部７ｂの一部となっている。 Moreover, the cover body 7 is provided with a closing piece 7g that closes the front of the second blade portion 6a in the first movement region at the facing portion 7c. Specifically, the closing piece 7g is formed so as to protrude from the plate surface of the cover body 7 so as to have a height that exceeds at least the thickness of the second blade body 6, and faces the center side of the penetrating portion 4a. Is flush with the inner periphery of the cover body 7 (in the illustrated embodiment, the inner peripheral step 7f) and is part of the engaging portion 7a or the holding portion 7b.

また、このカバー体７には、その外周に、凹状の被掛合部７ｈが設けられており、この被掛合部７ｈに、前述の掛止め手段９としての板ばね９ａに設けられた凸状の掛合部９ｂが嵌まることで、カバー体７は、その出し入れ位置に、弾性的に保持される。すなわち、板ばね９ａの掛合部９ｂが、前記出し入れ位置にて、カバー体７の被掛合部７ｈに嵌まり、これによって、カバー体７は、その出し入れ位置に保持される。そして、その板ばね９ａの弾性に抗してカバー体７を回動（移動）させるように力を加えれば、板ばね９ａが変形して被掛合部７ｈが掛合部９ｂから外れ、カバー体７は、工具本体４に対して回動（移動）することができる。 Further, the cover body 7 is provided with a concave hooked portion 7h on the outer periphery thereof, and the hooked portion 7h has a convex shape provided on the plate spring 9a as the hooking means 9 described above. The cover body 7 is elastically held at the insertion / removal position by fitting the engaging portion 9b. That is, the engaging portion 9b of the leaf spring 9a is fitted into the engaged portion 7h of the cover body 7 at the loading / unloading position, whereby the cover body 7 is held at the loading / unloading position. When a force is applied to rotate (move) the cover body 7 against the elasticity of the leaf spring 9a, the leaf spring 9a is deformed and the engaged portion 7h is disengaged from the engagement portion 9b. Can be rotated (moved) with respect to the tool body 4.

次に、以上の構成からなる切断工具３の作用効果について説明する。この切断工具３によると、本体部４０１（工具本体４）は、コルゲート管２０１（保護管２）が貫通可能な貫通部４ａと、その貫通部４ａに対しコルゲート管２０１を出し入れ可能な開口部４ｂとを有している。ここにおいて、開口部４ｂには、コルゲート管２０１の断面略長円形状の幅狭方向Ｐ１の側にある第１の周壁２ａを切断する第１刃部５ａが突出し、貫通部４ａには、コルゲート管２０１の断面略長円形状の幅広方向Ｐ２の側にある第２の周壁２ｂを切断する第２刃部６ａが突出している。 Next, the effect of the cutting tool 3 having the above configuration will be described. According to this cutting tool 3, the main body part 401 (tool main body 4) includes a through part 4a through which the corrugated pipe 201 (protective pipe 2) can penetrate, and an opening part 4b through which the corrugated pipe 201 can be taken in and out of the through part 4a. And have. Here, the opening 4b protrudes from the first blade 5a that cuts the first peripheral wall 2a on the side of the narrow direction P1 of the corrugated tube 201 having a substantially oval cross section, and the through-hole 4a has a corrugate. The 2nd blade part 6a which cut | disconnects the 2nd surrounding wall 2b in the width direction P2 side of the cross-sectional substantially ellipse shape of the pipe | tube 201 protrudes.

そして、切断工具３は、貫通部４ａに、カバー体７を備える。このカバー体７は、貫通部４ａの軸心方向に垂直な面に沿って移動することで、第２刃部６ａよりも貫通部４ａの中央側に突出する第１移動域（図４、図６参照）と、第２刃部６ａよりも貫通部４ａの中央側に突出することなく第２刃部６ａを貫通部４ａの中央側に露出させる第２移動域（図７、図８参照）とに渡って移動する。 And the cutting tool 3 is provided with the cover body 7 in the penetration part 4a. The cover body 7 moves along a plane perpendicular to the axial center direction of the penetrating portion 4a, so that the first moving region (FIGS. 4 and 4) protrudes more toward the center of the penetrating portion 4a than the second blade portion 6a. 6), and a second movement area in which the second blade portion 6a is exposed to the center side of the penetrating portion 4a without projecting to the center side of the penetrating portion 4a than the second blade portion 6a (see FIGS. 7 and 8). And move across.

そこで、この切断工具３により、コルゲート管２０１を切断するには、初めに、カバー体７を第１移動域中の出し入れ位置にして（図４参照）、コルゲート管２０１がその断面略長円形状の幅広方向Ｐ２の側から開口部４ｂを通って貫通部４ａに入るように、切断工具３を進める（図１０、図１２参照）。このとき、コルゲート管２０１の断面略長円形状の幅狭方向Ｐ１の側にある第１の周壁２ａが、開口部４ｂに突出する第１刃部５ａによって切断される（図１０、図１１参照）。 Therefore, in order to cut the corrugated pipe 201 with the cutting tool 3, first, the cover body 7 is set in the first movement area (see FIG. 4), and the corrugated pipe 201 has a substantially oval cross section. The cutting tool 3 is advanced so as to enter the through portion 4a from the side in the wide direction P2 through the opening 4b (see FIGS. 10 and 12). At this time, the first peripheral wall 2a on the side of the narrow direction P1 of the corrugated tube 201 having a substantially oval cross section is cut by the first blade portion 5a protruding into the opening 4b (see FIGS. 10 and 11). ).

次に、コルゲート管２０１が工具本体４に対して相対的に回動するように、切断工具３を回動する（図１４参照）。これにより、コルゲート管２０１の断面略長円形状の幅広方向Ｐ２の側にある第２の周壁２ｂが、貫通部４ａに突出する第２刃部６ａによって切断される（図１４、図１５参照）。ここで、カバー体７は、切断工具３の回動に先だって作業者の操作により第２移動域に移動したり、切断工具３の回動に連動して第２移動域に移動したりする（図示実施の形態においては、切断工具３の回動に連動して第２移動域に移動する）。なお、図１４および図１５は、切断工具３を時計回りに９０°回動したときの状態を示すが、コルゲート管２０１の第２の周壁２ｂの全体を切断するためには、必要に応じて、さらに切断工具３を時計回りに回動する。 Next, the cutting tool 3 is rotated so that the corrugated tube 201 is rotated relative to the tool body 4 (see FIG. 14). Thereby, the 2nd peripheral wall 2b in the side of the wide direction P2 of the cross-sectional oval shape of the corrugated pipe 201 is cut | disconnected by the 2nd blade part 6a which protrudes in the penetration part 4a (refer FIG. 14, FIG. 15). . Here, the cover body 7 moves to the second movement area by the operator's operation prior to the rotation of the cutting tool 3 or moves to the second movement area in conjunction with the rotation of the cutting tool 3 ( In the illustrated embodiment, it moves to the second movement area in conjunction with the rotation of the cutting tool 3). 14 and 15 show a state when the cutting tool 3 is rotated 90 ° clockwise. In order to cut the entire second peripheral wall 2b of the corrugated pipe 201, FIGS. Further, the cutting tool 3 is rotated clockwise.

そして、第１および第２の周壁２ａ、２ｂを切断した後（つまり、コルゲート管２０１の全周を切断した後）、コルゲート管２０１の断面略長円形状の幅広方向Ｐ２の側が開口部４ｂ側を向くように、切断工具３の回動位置を定めて（図示実施の形態においては、図１２に示す位置まで、切断工具３を回動して）、切断工具３をコルゲート管２０１から後退させることで、コルゲート管２０１は、貫通部４ａから開口部４ｂを通って外に出ることができる（図１０、図４参照）。ここで、カバー体７は、切断工具３の回動位置を定めた後に作業者の操作により出し入れ位置に移動したり、切断工具３の回動に連動して出し入れ位置に移動したりする（図示実施の形態においては、切断工具３の回動に連動して出し入れ位置に移動する）。 Then, after cutting the first and second peripheral walls 2a, 2b (that is, after cutting the entire circumference of the corrugated pipe 201), the side of the corrugated pipe 201 in the width direction P2 having a substantially oval cross section is the opening 4b side. The turning position of the cutting tool 3 is determined so as to face (in the illustrated embodiment, the cutting tool 3 is turned to the position shown in FIG. 12), and the cutting tool 3 is retracted from the corrugated tube 201. Thereby, the corrugated pipe | tube 201 can go outside through the opening part 4b from the penetration part 4a (refer FIG. 10, FIG. 4). Here, the cover body 7 is moved to the loading / unloading position by the operator's operation after the rotation position of the cutting tool 3 is determined, or moved to the loading / unloading position in conjunction with the rotation of the cutting tool 3 (illustrated). In the embodiment, the cutting tool 3 moves to the loading / unloading position in conjunction with the rotation).

こうして、この切断工具３により、コルゲート管２０１（保護管２）の断面略長円形状の幅狭方向Ｐ１の側にある第１の周壁２ａおよび幅広方向Ｐ２の側にある第２の周壁２ｂを切断することで、コルゲート管２０１内の配線・配管材１を切断することなく、コルゲート管２０１を切断することができる。そして、コルゲート管２０１を工具本体４の貫通部４ａに入れる際とか、コルゲート管２０１を貫通部４ａから出す際には、カバー体７は、第１移動域にあり、第２刃部６ａよりも貫通部４ａの中央側に突出しているため、この第２刃部６ａに注意を払う必要がない。すなわち、コルゲート管２０１を貫通部４ａに対し出し入れする際に、第１移動域にあるカバー体７により、作業者の手などが第２刃部６ａに接触しにくくすることができる。特に、図示実施の形態においては、カバー体７には、その第１移動域において第２刃部６ａの前方を被う閉塞片７ｇが設けられており、この閉塞片７ｇにより、作業者の手などが第２刃部６ａに一層接触しにくくなる。こうして、この切断工具３によれば、第２刃部６ａよりも貫通部４ａの中央側に突出するカバー体７を設けることで、第２刃部６ａに注意を払う必要がなく、コルゲート管２０１の切断作業を円滑に進めることができる。 Thus, by this cutting tool 3, the first peripheral wall 2a on the narrow direction P1 side and the second peripheral wall 2b on the wide direction P2 side of the corrugated tube 201 (protective tube 2) having a substantially oval cross section are formed. By cutting, the corrugated pipe 201 can be cut without cutting the wiring / pipe material 1 in the corrugated pipe 201. And when putting the corrugated pipe 201 into the penetrating part 4a of the tool body 4 or when taking the corrugated pipe 201 out of the penetrating part 4a, the cover body 7 is in the first movement area and is more than the second blade part 6a. Since it protrudes in the center side of the penetration part 4a, it is not necessary to pay attention to this 2nd blade part 6a. That is, when the corrugated tube 201 is taken in and out of the penetrating portion 4a, the operator's hand or the like can be made difficult to contact the second blade portion 6a by the cover body 7 in the first movement area. In particular, in the illustrated embodiment, the cover body 7 is provided with a closing piece 7g that covers the front of the second blade portion 6a in the first movement region, and this closing piece 7g allows the operator's hand to Or the like becomes more difficult to contact the second blade portion 6a. Thus, according to the cutting tool 3, by providing the cover body 7 that protrudes closer to the center of the penetrating portion 4a than the second blade portion 6a, it is not necessary to pay attention to the second blade portion 6a, and the corrugated tube 201 The cutting work can be smoothly carried out.

また、カバー体７は、コルゲート管２０１（保護管２）の外周に係合する係合部７ａを有している。このため、工具本体４（つまり、切断工具３）の回動に連動して、カバー体７は、第１移動域と第２移動域とに渡って移動する。そして、前記第２移動域にて、露出する第２刃部６ａによりコルゲート管２０１の第２の周壁２ｂが切断される。こうして、工具本体４の回動に連動して、カバー体７が工具本体４に対して相対的に移動（詳しくは、回動）するため、第２刃部６ａを露出させたり、再度カバー体７で第２刃部６ａを被ったりするために、工具本体４の回動以外に別途操作する必要がない。 Moreover, the cover body 7 has the engaging part 7a engaged with the outer periphery of the corrugated pipe | tube 201 (protection pipe | tube 2). For this reason, the cover body 7 moves across the first movement area and the second movement area in conjunction with the rotation of the tool body 4 (that is, the cutting tool 3). Then, in the second movement area, the second peripheral wall 2b of the corrugated pipe 201 is cut by the exposed second blade portion 6a. In this way, the cover body 7 moves relative to the tool body 4 (specifically, rotates) in conjunction with the rotation of the tool body 4, so that the second blade portion 6 a is exposed or the cover body again. 7 to cover the second blade portion 6a, it is not necessary to separately operate other than the rotation of the tool body 4.

また、係合部７ａは、コルゲート管２０１（保護管２）の第１の周壁２ａ、２ａの両方の外側（図示実施の形態においては、第１の周壁２ａ、２ａの両方および第２の周壁２ｂ、２ｂの一方の外側）に嵌合してそのコルゲート管２０１を保持する保持部７ｂからなり、この保持部７ｂにより、切断工具３（詳しくは、工具本体４）の、コルゲート管２０１に対するがたつきを抑えることができる。このため、切断工具３を、正確にコルゲート管２０１の軸心に対して垂直な方向に回動させることができ、コルゲート管２０１の第２の周壁２ｂの切断を安定して行うことができる。 Further, the engaging portion 7a is formed on the outer sides of both the first peripheral walls 2a and 2a of the corrugated pipe 201 (protective pipe 2) (in the illustrated embodiment, both the first peripheral walls 2a and 2a and the second peripheral wall). 2b, 2b) and a holding portion 7b that holds the corrugated pipe 201 and holds the corrugated pipe 201 with the cutting tool 3 (specifically, the tool main body 4) against the corrugated pipe 201. It can suppress the rattling. For this reason, the cutting tool 3 can be accurately rotated in a direction perpendicular to the axis of the corrugated tube 201, and the second peripheral wall 2b of the corrugated tube 201 can be stably cut.

また、工具本体４（詳しくは、本体部４０１）の開口部４ｂの口縁には、コルゲート管２０１の谷２ｄに入り込んでそのコルゲート管２０１の長手方向の移動を阻止する第１係止部４ｃが設けられ、同様に、カバー体７には、コルゲート管２０１の谷２ｄに入り込んでそのコルゲート管２０１の長手方向の移動を阻止する第２係止部７ｅが設けられている。したがって、これら第１係止部４ｃおよび第２係止部７ｅにより、コルゲート管２０１の長手方向に対する切断工具３の位置が定まり、第１の刃体５と第２の刃体６とで、コルゲート管２０１の同じ山２ｃの部分を正確に切断することができる。 Further, the first locking portion 4c that enters the trough 2d of the corrugated tube 201 at the mouth edge of the opening 4b of the tool main body 4 (specifically, the main body portion 401) and prevents the corrugated tube 201 from moving in the longitudinal direction. Similarly, the cover body 7 is provided with a second locking portion 7e that enters the valley 2d of the corrugated pipe 201 and prevents the corrugated pipe 201 from moving in the longitudinal direction. Therefore, the position of the cutting tool 3 with respect to the longitudinal direction of the corrugated tube 201 is determined by the first locking portion 4c and the second locking portion 7e, and the first blade body 5 and the second blade body 6 are corrugated. The same crest 2c portion of the tube 201 can be accurately cut.

また、第２係止部７ｅは、貫通部４ａに挿入されたコルゲート管２０１の相対的な回動に対し、常にそのコルゲート管２０１の谷２ｄに入り込んで係止しているため、コルゲート管２０１の全周が切断されたときとか、その後にコルゲート管２０１を開口部４ｂから外に出す向きに向けるまでの間に、切断されたコルゲート管２０１の、第２係止部７ｅで係止された側は、その長手方向に離れることはない。 Further, since the second locking portion 7e always enters and locks the valley 2d of the corrugated tube 201 with respect to the relative rotation of the corrugated tube 201 inserted into the penetrating portion 4a, the corrugated tube 201 When the entire circumference of the corrugated tube 201 is cut, or until the corrugated tube 201 is turned to the direction of exiting from the opening 4b, the cut corrugated tube 201 is locked by the second locking portion 7e. The sides do not leave in the longitudinal direction.

また、切断工具３が、第２係止部７ｅを有しない場合には、切断されて二つになったコルゲート管２０１（保護管２）の両方が、互いに分離するようにして切断工具３から離れる。そこで、露出した配線・配管材１を貫通部４ａから開口部４ｂを通って外に出すにあたって、第２の刃体６の第２刃部６ａを第１移動域（詳しくは、出し入れ位置）にあるカバー体７が被っており、また、第１の刃体５の先端部分における、開口部４ｂの奥側は、刃がなく、湾曲部５ｃ（図３参照）となっていることから、配線・配管材１が、これら第２の刃体６や第１の刃体５で傷付くことがない。もっとも、切断工具３が、第２係止部７ｅを有しない場合には、コルゲート管２０１（保護管２）を切断した後に、露出した配線・配管材１を貫通部４ａから抜き取るように、切断工具３を配線・配管材１の長手方向に移動させてもよい。そして、この場合には、カバー体７を第１移動域に位置させることで、配線・配管材１が第２の刃体６で傷付くことがない。 Further, when the cutting tool 3 does not have the second locking portion 7e, both the corrugated pipe 201 (protective pipe 2) that has been cut into two are separated from each other from the cutting tool 3. Leave. Therefore, when the exposed wiring / piping material 1 is taken out from the through portion 4a through the opening 4b, the second blade portion 6a of the second blade body 6 is moved to the first movement region (specifically, the loading / unloading position). Since a certain cover body 7 is covered, and the back side of the opening 4b at the distal end portion of the first blade body 5 has no blade and is a curved portion 5c (see FIG. 3), the wiring The piping material 1 is not damaged by the second blade body 6 or the first blade body 5. However, when the cutting tool 3 does not have the second locking portion 7e, the cutting tool 3 is cut so as to extract the exposed wiring / pipe material 1 from the through portion 4a after cutting the corrugated tube 201 (protective tube 2). The tool 3 may be moved in the longitudinal direction of the wiring / piping material 1. In this case, the wiring body / pipe material 1 is not damaged by the second blade body 6 by positioning the cover body 7 in the first movement region.

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、配線・配管材１としての配管材は、追焚き用とか床暖房用とかの配管材でなくとも、給水管とか給湯管とか、その他の配管材であってもよい。また、配管材は、管１ａ、１ａにフィルム１ｂが巻き付けられて形成されているが、このフィルム１ｂは、無くともよい。また、配線・配管材１は、配管材の他に、通信用あるいは電力用の配線材であってもよい。 In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the piping material as the wiring / piping material 1 may be a water supply pipe, a hot water supply pipe, or other piping material, instead of a piping material for tracking or floor heating. Moreover, although the piping material is formed by winding the film 1b around the pipes 1a and 1a, the film 1b may be omitted. Further, the wiring / piping material 1 may be a wiring material for communication or power in addition to the piping material.

また、切断工具３を用いて保護管２を切断するにあたって、保護管２内に配線・配管材１が挿入された状態で保護管２を切断する場合のほか、保護管２内に配線・配管１材が挿入されていない状態で保護管２を切断しても構わない。 In addition, when cutting the protective tube 2 using the cutting tool 3, the protective tube 2 is cut in a state where the wiring / pipe material 1 is inserted into the protective tube 2, and the protective tube 2 is also wired / piped. The protective tube 2 may be cut in a state where one material is not inserted.

また、カバー体における、係合部７ａや保持部７ｂは、カバー体７の内周の段部７ｆからなっているが、その他に、第２係止部７ｅの先端が、コルゲート管２０１の谷２ｄの底に当たることで、この第２係止部７ｅの先端が、係合部７ａであったり保持部７ｂであったりしてもよい。 In addition, the engaging portion 7a and the holding portion 7b of the cover body are formed of a step portion 7f on the inner periphery of the cover body 7. In addition, the tip of the second locking portion 7e is a valley of the corrugated tube 201. By hitting the bottom of 2d, the tip of the second locking portion 7e may be the engaging portion 7a or the holding portion 7b.

また、カバー体７における係合部７ａは、コルゲート管２０１（保護管２）に嵌合する保持部７ｂからならなくとも、カバー体７が、コルゲート管２０１（保護管２）に十分ながた付きを持って係合するものであってもよい。さらには、この係合部７ａは、なくともよい。もっとも、この場合には、カバー体７の第１移動域と第２移動域とに渡る移動は、工具本体４（切断工具３）の回動に連動しなくなるため、このカバー体７の移動を、それ自身を直接動かす等により行う必要がある。 Moreover, even if the engaging part 7a in the cover body 7 does not consist of the holding part 7b fitted to the corrugated pipe 201 (protective pipe 2), the cover body 7 is sufficiently long for the corrugated pipe 201 (protective pipe 2). You may engage with a stick. Furthermore, the engaging portion 7a may not be provided. In this case, however, the movement of the cover body 7 across the first movement area and the second movement area is not linked to the rotation of the tool body 4 (cutting tool 3). It must be done by moving itself directly.

また、切断工具３は、第１係止部４ｃと第２係止部７ｅとを備えているが、これら第１および第２係止部４ｃ、７ｅの一方あるいは両方は、無くともよい。 Moreover, although the cutting tool 3 is provided with the 1st latching | locking part 4c and the 2nd latching | locking part 7e, one or both of these 1st and 2nd latching | locking parts 4c and 7e do not need to be.

また、カバー体７は、互いに対向する対向部７ｃ、７ｃと、それら対向部７ｃ、７ｃを一方で繋ぐ中間部７ｄとで、略Ｕ字状に形成されているが、中間部７ｄを無くして、分離した二つの対向部７ｃ、７ｃからなっていてもよい。こうすることで、出し入れ位置となるカバー体７の回動位置を、半回転（１８０°）単位で設けることができる。そして、この場合には、それぞれの対向部７ｃ、７ｃを、工具本体４に対して回動可能に支持する必要があり、また、それぞれの対向部７ｃ、７ｃを、板ばね９ａ等の掛止め手段９によって出し入れ位置に保持するのが望ましい。 Further, the cover body 7 is formed in a substantially U-shape with opposing portions 7c and 7c facing each other and an intermediate portion 7d that connects the opposing portions 7c and 7c on one side, but the intermediate portion 7d is eliminated. , It may consist of two separated opposing portions 7c, 7c. By doing so, the rotation position of the cover body 7 serving as the loading / unloading position can be provided in units of half rotation (180 °). In this case, it is necessary to support each of the facing portions 7c and 7c so as to be rotatable with respect to the tool body 4, and each of the facing portions 7c and 7c is latched by a leaf spring 9a or the like. It is desirable to hold it in and out by means 9.

また、カバー体７は、第１移動域と第２移動域とに渡る移動が、回動によってなされるものでなくとも、並進移動によってなされるものであってもよい。また、この第１移動域と第２移動域とに渡る移動は、切断工具３の回動に連動するものでなくとも、作業者の操作によるものであってもよい。 In addition, the cover body 7 may be moved in a translational manner, instead of being moved by the rotation, over the first movement region and the second movement region. Further, the movement over the first movement area and the second movement area may not be interlocked with the rotation of the cutting tool 3 but may be performed by the operator's operation.

また、カバー体７は、第２刃部６ａの一方の側面Ｍを被うものであるが、第２刃部６ａの両方の側面を被うものであってもよい。また、カバー体７は、第２刃部６ａの前方を被う閉塞片７ｇを有しているが、この閉塞片７ｇは、なくともよい。 Moreover, although the cover body 7 covers one side surface M of the second blade portion 6a, the cover body 7 may cover both side surfaces of the second blade portion 6a. Moreover, the cover body 7 has the closing piece 7g which covers the front of the 2nd blade part 6a, However, This closing piece 7g does not need to be.

また、カバー体７は、第１移動域中に、貫通部４ａに対し、保護管２を、開口部４ｂを通じて出し入れ可能とする、出し入れ位置を有するが、これに加えて、第２移動域中にも、出し入れ可能とする位置が設けられてもよい。 Further, the cover body 7 has a loading / unloading position in which the protective tube 2 can be inserted / removed through the opening 4b with respect to the penetrating part 4a in the first movement area. In addition, a position that allows entry and exit may be provided.

また、第１の刃体５と第２の刃体６とは、それぞれ一対設けられているが、片方だけであってもよい。ここで、第１の刃体５が片方だけである場合には、保護管２を開口部４ｂから貫通部４ａに入れる際に切断されるのは、保護管２の第１の周壁２ａ、２ａの一方のみであるが、保護管２に対する切断工具３の向きを変えて出し入れしたり、切断工具３を上下反転して出し入れしたりすることで、第１の周壁２ａ、２ａの両方を切断することができる。 Moreover, although the 1st blade body 5 and the 2nd blade body 6 are each provided in a pair, only one side may be sufficient. Here, when the first blade body 5 is only one side, the first peripheral wall 2a, 2a of the protective tube 2 is cut when the protective tube 2 is inserted into the through portion 4a from the opening 4b. However, both the first peripheral walls 2a and 2a are cut by changing the direction of the cutting tool 3 with respect to the protective tube 2 and putting it in and out or by turning the cutting tool 3 upside down. be able to.

また、保護管２は、コルゲート管２０１でなくとも、平滑管等その他の管であってもよい。 Further, the protective tube 2 may not be the corrugated tube 201 but may be another tube such as a smooth tube.

１配線・配管材
２保護管
２０１コルゲート管
２ａ第１の周壁
２ｂ第２の周壁
２ｃ山
２ｄ谷
３切断工具
４工具本体
４ａ貫通部
４ｂ開口部
４ｃ第１係止部
５第１の刃体
５ａ第１刃部
６第２の刃体
６ａ第２刃部
７カバー体
７ａ係合部
７ｂ保持部
７ｅ第２係止部
Ｐ１幅狭方向
Ｐ２幅広方向 DESCRIPTION OF SYMBOLS 1 Wiring and piping material 2 Protective pipe 201 Corrugated pipe 2a 1st surrounding wall 2b 2nd surrounding wall 2c Mountain 2d Valley 3 Cutting tool 4 Tool main body 4a Through-hole 4b Opening part 4c 1st locking part 5 1st blade 5a 1st blade part 6 2nd blade body 6a 2nd blade part 7 Cover body 7a Engagement part 7b Holding part 7e 2nd latching | locking part P1 Narrow direction P2 Wide direction

Claims

A cutting tool for cutting a protective tube having a substantially oval cross section,
A tool body, a first blade body and a second blade body fixed to the tool body, and a cover body,
The tool body has a penetrating portion through which the protective tube can penetrate, and an opening through which the protective tube can be taken in and out of the penetrating portion from the side in the wide direction having a substantially oval cross section.
The first blade portion, which is the blade portion of the first blade body, protrudes into the opening, and the protective tube passes through the opening so that the protective tube has a substantially oval cross-sectional side in the narrow direction. Cutting the first peripheral wall at
The second blade portion, which is the blade portion of the second blade body, protrudes into the penetrating portion, and the protection tube passing through the penetrating portion rotates relative to the tool body to protect the second blade portion. Cutting the second peripheral wall on the side of the tube having a substantially oval cross-section in the wide direction;
The cover body is provided in the penetrating portion and is movable along a plane perpendicular to the axial center direction of the penetrating portion, and by the movement, the cover body penetrates the penetrating portion more than the second blade portion. A first movement area projecting toward the center side of the part, and a second movement area exposing the second blade part to the center side of the penetration part without projecting to the center side of the penetration part from the second blade part And move across
The cover body, the first moving range, with respect to the through portion, the protective tube, to allow out through the opening, it has a loading and unloading position, and,
When the tool body is rotated with respect to the protective tube inserted into the penetrating portion from the opening when the cover body is in the loading / unloading position, the cover body is interlocked with the rotation, While moving across the first movement area and the second movement area relative to the tool body, the second blade section cuts the second peripheral wall of the protective tube in the second movement area , Cutting tool for protective tube.

A cutting tool for cutting a protective tube having a substantially oval cross section,
A tool body, a first blade body and a second blade body fixed to the tool body, and a cover body,
The tool body has a penetrating portion through which the protective tube can penetrate, and an opening through which the protective tube can be taken in and out of the penetrating portion from the side in the wide direction having a substantially oval cross section.
The first blade portion, which is the blade portion of the first blade body, protrudes into the opening, and the protective tube passes through the opening so that the protective tube has a substantially oval cross-sectional side in the narrow direction. Cutting the first peripheral wall at
The second blade portion, which is the blade portion of the second blade body, protrudes into the penetrating portion, and the protection tube passing through the penetrating portion rotates relative to the tool body to protect the second blade portion. Cutting the second peripheral wall on the side of the tube having a substantially oval cross-section in the wide direction;
The cover body is provided in the penetrating portion and is movable along a plane perpendicular to the axial center direction of the penetrating portion, and by the movement, the cover body penetrates the penetrating portion more than the second blade portion. A first movement area projecting toward the center side of the part, and a second movement area exposing the second blade part to the center side of the penetration part without projecting to the center side of the penetration part from the second blade part And move across
The cover body has a loading / unloading position that allows the protective tube to be inserted / removed through the opening with respect to the penetrating portion in the first movement area,
The cover body is supported by the tool body so as to be rotatable about the axis of the penetrating portion, and
The cover body has an engaging portion that engages with an outer periphery of the protective tube,
When the tool body is rotated with respect to the protective tube inserted into the penetrating portion from the opening when the cover body is in the loading / unloading position, the engaging portion is engaged with the outer periphery of the protective tube. Then, the cover body stays on the protective tube side, so that the cover body rotates relative to the tool main body and moves across the first movement area and the second movement area. with its said second edge portion at a second transfer zone cuts the second peripheral wall of the protective tube, the cutting tool for protection tube.

The said engaging part is a cutting tool for protective tubes of Claim 2 which consists of a holding part which fits the both outer sides of the 1st surrounding wall of the said protective tube, and hold | maintains the protective tube.

The protective tube is a corrugated tube in which a mountain valley is formed on the peripheral wall,
The first blade body and the second blade body cut a crest portion of the corrugated tube,
At the lip of the opening is provided a first locking portion that enters the trough of the corrugated tube and prevents the corrugated tube from moving in the longitudinal direction,
4. The cutting tool for a protective tube according to claim 3, wherein the cover body is provided with a second locking portion that enters the trough of the corrugated tube and prevents the corrugated tube from moving in the longitudinal direction.