JP2000326125A - Cylindrical cutting tool - Google Patents

Cylindrical cutting tool

Info

Publication number
JP2000326125A
JP2000326125A JP11134407A JP13440799A JP2000326125A JP 2000326125 A JP2000326125 A JP 2000326125A JP 11134407 A JP11134407 A JP 11134407A JP 13440799 A JP13440799 A JP 13440799A JP 2000326125 A JP2000326125 A JP 2000326125A
Authority
JP
Japan
Prior art keywords
body portion
opening
cutting tool
cylindrical
peripheral surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP11134407A
Other languages
Japanese (ja)
Inventor
Yoshihiro Yokoyama
義博 横山
Hirokazu Asano
博和 浅野
Yoshio Hironaka
良雄 弘中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tohoku Electric Power Co Inc
Unika Co Ltd
Original Assignee
Tohoku Electric Power Co Inc
Unika Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tohoku Electric Power Co Inc, Unika Co Ltd filed Critical Tohoku Electric Power Co Inc
Priority to JP11134407A priority Critical patent/JP2000326125A/en
Publication of JP2000326125A publication Critical patent/JP2000326125A/en
Withdrawn legal-status Critical Current

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  • Drilling Tools (AREA)

Abstract

PROBLEM TO BE SOLVED: To allow an efficient and adequate drilling work by providing another body portion having a circular are cross sectional surface whose center is a central axis of a body, which is removably mounted on a body portion so as to close an opening in the body portion. SOLUTION: Radius of the inner peripheral surface inside in the radius direction of a second body portion 30 is substantially equal to a radius of the outer peripheral surface outside in the radius direction of a first body portion 24, has a circular arc length capable of covering an opening 28 in the first body portion 24, and allows the inner peripheral surface to be tightly attached or fixed to the outer peripheral surface of the first body portion 24 so as to close this opening 28. After a cable extending from one side of a wall is inserted into the first body portion 24 through the opening 28, the second body portion 30 is mounted and fixed to close the opening 28. Then, a worker rotates this cylindrical tool about its central axis with a handle 40, and performs a cutting work.

Description

【発明の詳細な説明】本発明は、壁などに穿孔作業を行
うための円筒状切削工具に関する。
The present invention relates to a cylindrical cutting tool for performing a drilling operation on a wall or the like.

【0001】[0001]

【従来の技術】従来のこの種切削工具は、図1に示すよ
うに、先端縁に切削刃10が設けられた円筒状のボディ
12を有し、その後端のシャンク14を電動工具に装着
し、回転駆動することによって、穿孔作業を行うように
なっている。
2. Description of the Related Art As shown in FIG. 1, a conventional cutting tool of this type has a cylindrical body 12 provided with a cutting blade 10 at a leading edge thereof, and a shank 14 at a rear end thereof is mounted on a power tool. The drilling operation is performed by rotationally driving.

【0002】[0002]

【発明が解決しようとする課題】例えば、図2に示すよ
うに、壁Wをその一方の側から他方の側に貫通して延び
るように固定設定されている電力ケーブルCを、同壁か
ら外すために、該ケーブル周囲の壁部分を環状に切削す
る必要が生じる場合がある。このようなケーブルは、一
般的に、コンクリート壁などに設けられた穴を通した
後、穴とケーブルとの間に発泡性のレジン等を充填し
て、その周囲のシールがはかられている。従って、この
ケーブルを壁から外すときには、発砲レジンを切断すれ
ばよいので、比較的切断作業は容易であるが、上記の如
き円筒状工具を使用しようとした場合、通常は当該ケー
ブルを切断することなしには同ケーブルを円筒状工具内
に通すことはできないため、同工具による上記切削は行
えない。このため、そのような場合には、図3に示すよ
うに、ケーブルCの周囲の一箇所にドリルにて穴Hをあ
け、それにのこ刃等を入れてケーブルの周りを環状に切
断するようにしているが、そのような作業は、円筒状工
具を用いた場合に比べて、作業が煩雑であり、しかも、
ケーブル等に損傷を与える可能性が高い。
For example, as shown in FIG. 2, a power cable C fixedly set so as to extend through the wall W from one side to the other side is removed from the wall. Therefore, it may be necessary to cut a wall portion around the cable in an annular shape. Such a cable is generally filled with a foamable resin or the like between the hole and the cable after passing through a hole provided in a concrete wall or the like, and a seal is provided around the hole. . Therefore, when removing this cable from the wall, it is only necessary to cut the firing resin, so the cutting work is relatively easy.However, when using the cylindrical tool as described above, it is usually necessary to cut the cable. Without this, the cable cannot be passed through the cylindrical tool, so that the above cutting cannot be performed by the tool. For this reason, in such a case, as shown in FIG. 3, a hole H is drilled at one location around the cable C, and a saw blade or the like is inserted into the hole H to cut the circumference of the cable into an annular shape. However, such an operation is more complicated than using a cylindrical tool, and moreover,
There is a high possibility of damaging cables and the like.

【0003】本発明は、上記のような状況においても使
用のできる円筒状切削工具を提供することを目的として
いる。
An object of the present invention is to provide a cylindrical cutting tool which can be used even in the above-mentioned situation.

【0004】[0004]

【課題を解決するための手段】すなわち、本発明に係る
円筒状工具は、円筒状のボディと該ボディの先端縁に設
けられた切削刃とを有し、当該円筒状ボディをその中心
軸線を中心に回転して穿孔作業を行うための円筒状切削
工具において、円筒状のボディが、当該ボディの軸線方
向に延び、断面が同ボディの中心軸線を中心とする円弧
状とされた第1のボディ部であって、該ボディ部の断面
視で両端間に形成され上記軸線方向に延びる開口を有し
ている第1のボディ部と、該ボディ部の上記開口を閉じ
るようにして、当該ボディ部に取り外し可能に取り付け
られる、同ボディの中心軸線を中心とする円弧状断面を
有する第2のボディ部とを有していることを特徴とす
る。
That is, a cylindrical tool according to the present invention has a cylindrical body and a cutting blade provided at a leading edge of the body, and the center axis of the cylindrical body is set to the center. In a cylindrical cutting tool for performing a drilling operation by rotating about a center, a cylindrical body extends in an axial direction of the body and has a first section whose cross section is formed in an arc shape centered on a center axis of the body. A first body portion having an opening formed between both ends thereof in a cross-sectional view of the body portion and extending in the axial direction, and the body portion being closed by closing the opening of the body portion; A second body portion detachably attached to the portion and having an arc-shaped cross section centered on the center axis of the body.

【0005】より具体的には、第2のボディ部は、その
半径方向内側の内周面の半径が、第1のボディ部の半径
方向外側の外周面の半径と実質的に同じとされ、且つ、
上記開口を覆うことが出来る円弧長さを有しており、同
開口を閉じるように第1のボディ部の外周面上に密着固
定されるようになされる。
More specifically, the radius of the radially inner inner peripheral surface of the second body portion is substantially equal to the radius of the radially outer peripheral surface of the first body portion. and,
It has an arc length capable of covering the opening, and is tightly fixed on the outer peripheral surface of the first body portion so as to close the opening.

【0006】また、第1のボディ部の開口は、中心軸線
を中心として約100度以内の角度範囲を有するように
するのが、その剛性を保つ上で好ましい。第2のボディ
部の軸線方向長さは、第1のボディ部の軸線方向長さと
必ずしも同じ長さとする必要は無く、それよりも短する
こともできる。
It is preferable that the opening of the first body has an angle range of about 100 degrees or less about the center axis in order to maintain its rigidity. The axial length of the second body part does not necessarily have to be the same as the axial length of the first body part, and may be shorter.

【0007】ボディ部には、例えば直径方向で反対側か
ら半径方向外側に延びるハンドルを設けて、作業者がそ
のハンドルを持って当該円筒状切削工具にその軸線を中
心とする回転力を与えることにより穿孔作業を行うこと
ができるようにすることもできる。
The body portion is provided with, for example, a handle extending radially outward from the opposite side in the diametrical direction, and the operator holds the handle and applies a rotational force about the axis to the cylindrical cutting tool. , The drilling operation can be performed.

【0008】[0008]

【発明の実施形態】図4は、本発明に係る円筒状工具2
0の1つの実施形態が示されている。図示のように、こ
の円筒状工具20は円筒状のボディ22を有しており、
該ボディは、当該ボディの軸線方向に延び、断面が同ボ
ディの中心軸線を中心とする円弧状とされた第1のボデ
ィ部24であって、該ボディ部の横断面視で両端26,
26間に形成され上記軸線方向に延びる開口28を有し
ている第1のボディ部24と、該ボディ部の上記開口2
8を閉じるようにして、当該ボディ部に取り外し可能に
取り付けられる、同ボディの中心軸線を中心とする円弧
状断面を有する第2のボディ部30とを有している。第
2のボディ部30は、その半径方向内側の内周面の半径
が、第1のボディ部24の半径方向外側の外周面の半径
と実質的に同じとされ、且つ、第1ボディ部の開口28
を覆うことが出来る円弧長さを有しており、同開口を閉
じるように第1のボディ部の外周面上に密着固定される
ようになされている。第1及び第2ボディ部24,30
は、穿孔作業中に受ける回転方向での切削抵抗及び穿孔
方向への推力に対して耐える程度の強度を持って結合さ
れればよく、仮溶接等、種々の方法で行うことができ
る。
FIG. 4 shows a cylindrical tool 2 according to the present invention.
One embodiment of zero is shown. As shown, the cylindrical tool 20 has a cylindrical body 22.
The body is a first body portion 24 extending in the axial direction of the body and having a circular cross section centered on the center axis of the body.
26, a first body part 24 having an opening 28 extending in the axial direction and the opening 2 of the body part.
And a second body part 30 having an arc-shaped cross section centered on the center axis of the body, which is detachably attached to the body part so as to close the body 8. The second body portion 30 has a radius of an inner peripheral surface on a radially inner side substantially equal to a radius of an outer peripheral surface on a radially outer side of the first body portion 24, and Opening 28
And has an arc length that can cover the first body portion so as to close the opening. First and second body portions 24, 30
May be joined with a strength enough to withstand the cutting resistance in the rotating direction and the thrust in the drilling direction received during the drilling operation, and may be performed by various methods such as temporary welding.

【0009】図示の例では、第2のボディ部30の軸線
方向長さが第1のボディ部24の軸線方向長さよりも短
くされており、両ボディ部24、30の先端縁が実質的
に同一円周上にあるようにされ、ボディ22の先端縁3
4を構成するように配置されており、該先端縁34には
切削刃32が所定間隔をあけて設けられている。切削刃
は、切削抵抗や切りくずの排出性を考慮して決定され、
図示の例では、切削刃は切削抵抗を最小限に抑えるため
に、第1及び第2ボディ部の肉厚分に、切りくず排出を
考慮した分を加えた幅とされている。切削刃は、第1及
び第2ボディ部にそれぞれ設けられるが、それらボディ
部が結合されたときに、全体として等間隔となるように
配置されており、又、第2ボディ部30の先端縁には、
第1ボディ部と結合した際に、第1ボディ部の円弧状先
端縁の両端側にある切削刃32‘、32’を受け入れる
切欠が設けられている。
In the illustrated example, the length of the second body 30 in the axial direction is shorter than the length of the first body 24 in the axial direction. The tip 3 of the body 22 is made to be on the same circumference.
The cutting edge 32 is provided at a predetermined interval on the tip edge 34. The cutting blade is determined in consideration of cutting resistance and chip evacuation,
In the illustrated example, the cutting blade has a width obtained by adding a thickness considering the chip discharge to the thickness of the first and second body portions in order to minimize the cutting resistance. The cutting blades are provided on the first and second body portions, respectively, and are arranged so as to be equally spaced as a whole when the body portions are joined. In
Notches are provided for receiving the cutting blades 32 ', 32' at both ends of the arc-shaped leading edge of the first body portion when coupled to the first body portion.

【0010】また、第1ボディ部24の後端縁には厚肉
の円弧状フランジ38が固定されており、該フランジの
直径方向で反対側の位置には、それぞれ半径方向外側に
延びるハンドル40(一方のみを示す)が設けられてい
る。
A thick arc-shaped flange 38 is fixed to the rear end edge of the first body portion 24, and a handle 40 extending radially outward is provided at a position on the opposite side in the diameter direction of the flange. (Only one is shown).

【0011】第1のボディ部は、その剛性を保つ意味
で、その中心軸線を中心として約100度以内の角度範
囲Aにわたる円弧状断面を有するものとすることが好ま
しい。切削作業、例えば前述したケーブルを外すための
切削作業に当たっては、壁の一方側から延びるケーブル
を開口28を通して第1ボディ24内に通した後、第2
ボディを図4に示す如く取り付け固定し、開口28を閉
じ、作業者がハンドル40を持って当該円筒状工具をそ
の中心軸線の周りで回転させたりすりこぎ運動させなが
ら切削作業を行う。尚、図示の実施形態においては、ハ
ンドルを有するマニュアル式工具を示したが、電動式と
することができることは明らかであろう。
In order to maintain the rigidity of the first body portion, it is preferable that the first body portion has an arc-shaped cross section over an angle range A within about 100 degrees around the center axis. In the cutting operation, for example, the above-described cutting operation for disconnecting the cable, the cable extending from one side of the wall is passed through the opening 28 into the first body 24, and then the second operation is performed.
The body is mounted and fixed as shown in FIG. 4, the opening 28 is closed, and the operator carries out the cutting operation while holding the handle 40 and rotating or rubbing the cylindrical tool around its central axis. In the illustrated embodiment, a manual tool having a handle is shown, but it is apparent that the tool can be electrically operated.

【0012】壁を貫通した後、工具を引き抜き、第2ボ
ディ部30を第1ボディ部24から外し、開口28をあ
け、同開口を通してケーブル及びその周りに付着する壁
部材を取り出して穿孔作業を終了する。
After penetrating the wall, the tool is pulled out, the second body part 30 is detached from the first body part 24, an opening 28 is opened, and a cable and a wall member adhered therearound are taken out through the opening to perform a drilling operation. finish.

【0013】[0013]

【発明の効果】本発明に係る円筒状切削工具は、上記の
如く構成されるので、前述した従来の穿孔方法に比べて
はるかに効率良く適正な穿孔作業を行うことができる。
Since the cylindrical cutting tool according to the present invention is configured as described above, it is possible to perform an appropriate drilling operation much more efficiently than the conventional drilling method described above.

【図面の簡単な説明】[Brief description of the drawings]

【図1】従来の円筒状切削工具の斜視図FIG. 1 is a perspective view of a conventional cylindrical cutting tool.

【図2】本発明にかかる円筒状切削工具で切削しようと
する構造物の例を示す斜視図
FIG. 2 is a perspective view showing an example of a structure to be cut by the cylindrical cutting tool according to the present invention.

【図3】図2に示す如き構造物に対する穿孔作業の従来
の方法を示す正面図
FIG. 3 is a front view showing a conventional method of perforating a structure as shown in FIG. 2;

【図4】本発明に係る円筒状切削工具の斜視図FIG. 4 is a perspective view of a cylindrical cutting tool according to the present invention.

【図5】図4の円筒状切削工具の先端側から見た端面図5 is an end view of the cylindrical cutting tool of FIG.

【図6】同円筒状切削工具の第1ボディ部の端面図FIG. 6 is an end view of a first body portion of the cylindrical cutting tool.

【符号の説明】[Explanation of symbols]

20……円筒状切削工具 22……ボディ 24……第1ボディ部 28……開口 30……第2ボディ部 32……切削刃 40……ハンドル 20 cylindrical cutting tool 22 body 24 first body portion 28 opening 30 second body portion 32 cutting blade 40 handle

───────────────────────────────────────────────────── フロントページの続き (72)発明者 浅野 博和 宮城県白石市字半沢屋敷前138−1 東北 電力株式会社白石営業所内 (72)発明者 弘中 良雄 宮城県本吉郡志津川町助作56−3 東北電 力株式会社志津川サービスセンター内 Fターム(参考) 3C037 AA00 FF08  ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hirokazu Asano 138-1 Hanzawa-Yashikimae, Shiraishi-shi, Miyagi Tohoku Electric Power Co., Inc.Shiraishi Sales Office (72) Inventor Yoshio Hironaka 56-56 Shizugawacho, Motoyoshi-gun, Miyagi Prefecture 3 Tohoku Electric Power Co., Inc. Shitsugawa Service Center F term (reference) 3C037 AA00 FF08

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】円筒状のボディと該ボディの先端縁に設け
られた切削刃とを有する円筒状切削工具において、上記
円筒状のボディが、 当該ボディの軸線方向に延び、断面が同ボディの中心軸
線を中心とする円弧状とされた第1のボディ部であっ
て、該ボディ部の断面視で両端間に形成され上記軸線方
向に延びる開口を有している第1のボディ部と、 該ボディ部の上記開口を閉じるようにして、当該ボディ
部に取り外し可能に取り付けられる、同ボディの中心軸
線を中心とする円弧状断面を有する第2のボディ部とを
有することを特徴とする円筒状切削工具。
1. A cylindrical cutting tool having a cylindrical body and a cutting blade provided at a tip edge of the body, wherein the cylindrical body extends in an axial direction of the body, and has a cross section of the body. A first body portion having an arc shape centered on a central axis, the first body portion having an opening formed between both ends in a cross-sectional view of the body portion and extending in the axial direction; A second body portion having an arc-shaped cross-section centered on a center axis of the body, the second body portion being removably attached to the body portion so as to close the opening of the body portion. Cutting tool.
【請求項2】上記第2のボディ部の半径方向内側の内周
面の半径が、上記第1のボディ部の半径方向外側の外周
面の半径と実質的に同じとされ、且つ、上記開口を覆う
ことが出来る円弧長さを有しており、同開口を閉じるよ
うに第1のボディ部の外周面上に密着固定されるように
なされていることを特徴とする請求項1に記載の円筒状
切削工具。
2. A radius of an inner peripheral surface on a radially inner side of the second body portion is substantially the same as a radius of an outer peripheral surface on a radially outer side of the first body portion, and the opening is formed. 2. An arc length that can cover the first body portion, and is fixed to an outer peripheral surface of the first body portion so as to close the opening. Cylindrical cutting tool.
【請求項3】上記第1のボディ部の開口が、上記中心軸
線を中心として約100度以内の角度範囲を有している
ことを特徴とする請求項1もしくは2に記載の円筒状切
削工具。
3. The cylindrical cutting tool according to claim 1, wherein the opening of the first body has an angle range within about 100 degrees around the center axis. .
【請求項4】上記第2のボディ部の軸線方向長さが上記
第1のボディ部の軸線方向長さよりも短くされているこ
とを特徴とする請求項1乃至3のいずれかに記載の円筒
状切削工具。
4. The cylinder according to claim 1, wherein an axial length of said second body portion is shorter than an axial length of said first body portion. Cutting tool.
【請求項5】上記ボディ部が、上記先端縁よりも後方の
位置に半径方向外方に突出するハンドルを有することを
特徴とする請求項1乃至4のいずれかに記載の円筒状切
削工具。
5. The cylindrical cutting tool according to claim 1, wherein the body portion has a handle at a position behind the leading edge and protruding radially outward.
JP11134407A 1999-05-14 1999-05-14 Cylindrical cutting tool Withdrawn JP2000326125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11134407A JP2000326125A (en) 1999-05-14 1999-05-14 Cylindrical cutting tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11134407A JP2000326125A (en) 1999-05-14 1999-05-14 Cylindrical cutting tool

Publications (1)

Publication Number Publication Date
JP2000326125A true JP2000326125A (en) 2000-11-28

Family

ID=15127672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11134407A Withdrawn JP2000326125A (en) 1999-05-14 1999-05-14 Cylindrical cutting tool

Country Status (1)

Country Link
JP (1) JP2000326125A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007196636A (en) * 2006-01-30 2007-08-09 Asahi Diamond Industrial Co Ltd Core drill and drilling method using this
US20090304468A1 (en) * 2005-10-24 2009-12-10 Paul Edward Duggan Drill Bit
US20180257153A1 (en) * 2015-09-28 2018-09-13 Hilti Aktiengesellschaft Keyhole saw

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090304468A1 (en) * 2005-10-24 2009-12-10 Paul Edward Duggan Drill Bit
JP2007196636A (en) * 2006-01-30 2007-08-09 Asahi Diamond Industrial Co Ltd Core drill and drilling method using this
US20180257153A1 (en) * 2015-09-28 2018-09-13 Hilti Aktiengesellschaft Keyhole saw
US10493537B2 (en) * 2015-09-28 2019-12-03 Hilti Aktiengesellschaft Keyhole saw

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