JP2007223177A - Cutting tool and cutting method - Google Patents
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- JP2007223177A JP2007223177A JP2006047270A JP2006047270A JP2007223177A JP 2007223177 A JP2007223177 A JP 2007223177A JP 2006047270 A JP2006047270 A JP 2006047270A JP 2006047270 A JP2006047270 A JP 2006047270A JP 2007223177 A JP2007223177 A JP 2007223177A
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本発明は、コンクリート製構造物内部に存在する障害物を切削して除去するための切削工具及び切削方法に関する。 The present invention relates to a cutting tool and a cutting method for cutting and removing an obstacle existing inside a concrete structure.
近年、既設の鋼管柱やコンクリート製電柱における地震や台風といった自然災害による影響を回避するために、これら柱状構造物の補強工事が行われるようになっている。このような補強工事としてコンクリート製電柱内部に補強材を充填する工法が知られる（特許文献１）。このコンクリート製電柱の補強工事は、電柱内部の中空部に補強用の鉄筋やアラミドロッドを最適な位置に配置し、さらにモルタル等を充填することにより行われる。 In recent years, in order to avoid the influence of natural disasters such as earthquakes and typhoons on existing steel pipe columns and concrete utility poles, these columnar structures have been reinforced. As such reinforcement work, a method of filling a reinforcing material inside a concrete electric pole is known (Patent Document 1). This concrete electric pole reinforcement work is carried out by placing reinforcing bars and aramid rods at optimal positions in the hollow portions inside the electric poles, and further filling them with mortar and the like.
しかしながら、コンクリート製電柱等の柱状構造物の中空部内壁面は、通常は仕上げがなされていないことから、電柱製造時に形成される「のろ」による突起や、製造後に、例えばアース孔（地気線取出口）等の開口から侵入した塵埃等の付着物が存在する。これらは補強用の鉄筋やアラミドロッドを最適な位置に配置する際の作業の障害になるばかりでは無く、充填されたモルタルと電柱の中空部内壁面との接着性を阻害する要因になりかねない可能性がある。 However, since the inner wall surface of the hollow part of a columnar structure such as a concrete electric pole is not usually finished, there are protrusions due to “slopes” formed during the production of electric poles, There are deposits such as dust that have entered from the opening of the outlet. These not only hinder the work when placing reinforcing bars and aramid rods in the optimal position, but may also impede the adhesion between the filled mortar and the inner wall of the hollow part of the utility pole. There is sex.
一方、汎用的な切削工具は市場には各種出回っているものの（例えば特許文献２）、コンクリートの切削に適した工具、特に柱状構造物内部の中空部の切削に適用できるものは殆ど見当たらない。また、柱状構造物内部の中空部の切削に流用可能と思われるものも（特許文献３）、装置が大がかりであり、既に設置されている柱状構造物に適用することは困難である。
上述したように、従来の切削工具および切削工法は、柱状構造物内部の中空部の切削に適用できるものは殆ど見当たらず、また流用可能と思われる装置は機構が複雑で大がかりであるため重量及び取り扱いの点で既設の電柱等の柱状構造物に適用することは殆ど不可能である。 As described above, there are few conventional cutting tools and cutting methods that can be applied to the cutting of the hollow portion inside the columnar structure, and the devices that are likely to be diverted are complicated and large in scale, so the weight and It is almost impossible to apply to existing columnar structures such as utility poles in terms of handling.
本発明は、既設の柱状構造物の作業環境が悪い場合であっても柱状構造物の内部の切削を容易かつ確実に行い得る切削工具及び切削方法を提供することにある。 It is an object of the present invention to provide a cutting tool and a cutting method capable of easily and reliably cutting the inside of a columnar structure even when the working environment of the existing columnar structure is poor.
上記の課題を解決するために、請求項１の切削工具は、柱状構造物の中空部内部の切削をガイド鋼線に固定して行うときの切削工具であって、前記ガイド鋼線を切削工具本体の中心軸とするときに、該中心軸を中心とする円周に沿って配置される複数の切削刃と、前記切削工具本体をガイド鋼線に着脱自在に固定するための固定部とを備えることを要旨とする。 In order to solve the above-mentioned problem, the cutting tool according to claim 1 is a cutting tool for performing the cutting inside the hollow portion of the columnar structure to a guide steel wire, and the guide steel wire is used as the cutting tool. A plurality of cutting blades arranged along a circumference centered on the central axis when the central axis of the main body is used, and a fixing portion for removably fixing the cutting tool main body to a guide steel wire The gist is to provide.
請求項１の切削工具によれば、ガイド鋼線に固定部にて着脱自在に固定された切削工具を用いて、その切削工具のガイド鋼線を中心とする円周に沿って配置される複数の切削刃により柱状構造物の中空部内部の切削を行うことが可能となる。 According to the cutting tool of claim 1, a plurality of the cutting tools arranged along a circumference centering on the guide steel wire of the cutting tool using the cutting tool detachably fixed to the guide steel wire by the fixing portion. With this cutting blade, it becomes possible to cut the inside of the hollow portion of the columnar structure.
請求項２の切削方法は、請求項１記載の切削工具において、前記切削刃は切削工具本体から突出して設けられ、かつ切削刃の刃先を前記中心軸に平行若しくはほぼ平行に設けたことを要旨とする。 The cutting method according to claim 2 is the cutting tool according to claim 1, wherein the cutting blade is provided so as to protrude from the cutting tool body, and the cutting edge of the cutting blade is provided in parallel or substantially parallel to the central axis. And
請求項２の切削工具では、切削刃が切削工具本体から突出して設けられ、かつ切削刃の刃先を前記中心軸に平行若しくはほぼ平行に設けられることから、柱状構造物の中空部内部を効率良く切削することが可能となる。 In the cutting tool according to claim 2, the cutting blade is provided so as to protrude from the cutting tool body, and the cutting edge of the cutting blade is provided in parallel or substantially parallel to the central axis, so that the hollow portion of the columnar structure can be efficiently formed. It becomes possible to cut.
請求項３の切削方法は、請求項１記載の切削工具において、前記切削工具本体が円柱形であると共に、前記切削刃がピン状であり、かつ該ピン状の切削刃が前記円柱形状の切削工具本体の外周面に多数配設されることを要旨とする。 The cutting method according to claim 3 is the cutting tool according to claim 1, wherein the cutting tool body has a cylindrical shape, the cutting blade has a pin shape, and the pin-shaped cutting blade has the cylindrical shape. The gist is that a large number of them are arranged on the outer peripheral surface of the tool body.
請求項３の切削工具では、切削刃がピン状であり、かつ該ピン状の切削刃が前記円柱形状の切削工具本体の外周面に多数配設されることから、柱状構造物の中空部内部を効率良く切削することが可能となる。 In the cutting tool according to claim 3, since the cutting blade is pin-shaped, and a large number of the pin-shaped cutting blades are disposed on the outer peripheral surface of the cylindrical cutting tool body, the inside of the hollow portion of the columnar structure Can be cut efficiently.
請求項４の切削方法は、請求項２または３記載の切削工具において、前記複数の切削刃がそれぞれ着脱自在に装着されることを要旨とする。 The gist of a cutting method according to claim 4 is that, in the cutting tool according to claim 2 or 3, each of the plurality of cutting blades is detachably mounted.
請求項４の切削工具では、複数の切削刃がそれぞれ着脱自在に装着されることから、摩耗若しくは損傷した切削刃を適宜、取り換えることにより、常に切削能力を新品と同様な状態で維持することが可能となる。 In the cutting tool according to claim 4, since the plurality of cutting blades are detachably mounted, the cutting ability can always be maintained in a state similar to that of a new article by appropriately replacing the worn or damaged cutting blade. It becomes possible.
請求項５の切削方法は、前記請求項１乃至４のいずれかに記載の切削工具を、鋼撚り線もしくは鋼単線からなるガイド鋼線に固定し、当該ガイド鋼線の先端側端からコンクリート製構造物の内部に挿入した後に、ガイド鋼線の他方側の端部を回転駆動し、少なくとも前記切削工具が弧を描くように当該ガイド鋼線を回転駆動することを要旨とする。 According to a fifth aspect of the present invention, there is provided a cutting method comprising: fixing the cutting tool according to any one of the first to fourth aspects to a guide steel wire made of a steel stranded wire or a steel single wire; After the insertion into the structure, the other end of the guide steel wire is rotationally driven, and the guide steel wire is rotationally driven so that at least the cutting tool draws an arc.
請求項５の切削方法では、切削工具が弧を描くように、つまり振り回すように当該ガイド鋼線を回転駆動するだけで、コンクリート製構造物の内部全体が容易かつ効率的に切削される。 In the cutting method according to the fifth aspect, the entire interior of the concrete structure can be easily and efficiently cut only by rotationally driving the guide steel wire so that the cutting tool draws an arc, that is, swings.
請求項６の切削方法は、前記請求項５に記載のガイド鋼線の長さは、当該ガイド鋼線を回転駆動したときに、ガイド鋼線に取り付けられた切削工具が前記コンクリート製構造物内部の切削範囲内の障害物を切削可能である長さであることを要旨とする。 The length of the guide steel wire according to claim 5 is such that when the guide steel wire is rotationally driven, a cutting tool attached to the guide steel wire is provided inside the concrete structure. The gist is that the length is such that an obstacle within the cutting range can be cut.
請求項６の切削方法では、ガイド鋼線を回転駆動することにより、コンクリート製構造物内部の切削範囲内の障害物を切削することが可能である。 In the cutting method of the sixth aspect, it is possible to cut an obstacle in the cutting range inside the concrete structure by rotating the guide steel wire.
請求項７の切削方法は、前記請求項５または６のいずれかに記載のガイド鋼線の一方の端部は、接続手段を介して電動機の回転軸と接続され、この電動機の回転駆動により当該ガイド鋼線をに取り付けられた切削工具を回転駆動することを要旨とする。 In the cutting method of claim 7, one end portion of the guide steel wire according to any of claims 5 and 6 is connected to a rotating shaft of an electric motor through a connecting means, and the electric motor is driven by rotation of the electric motor. The gist is to rotationally drive a cutting tool attached to a guide steel wire.
請求項７の切削方法では、電動機によりガイド鋼線を回転駆動することからコンクリート製構造物内部で高速に切削工具を振り回すように回転駆動することができ、これにより迅速な障害物の切削が可能となる。 In the cutting method of claim 7, since the guide steel wire is driven to rotate by an electric motor, the cutting tool can be driven to rotate at a high speed inside the concrete structure, thereby enabling quick obstacle cutting. It becomes.
本発明によれば、作業環境の悪い既設の柱状構造物の内部の切削を容易かつ確実に行い得る。 ADVANTAGE OF THE INVENTION According to this invention, the inside of the existing columnar structure with a bad working environment can be cut easily and reliably.
以下、本発明の実施の形態を図面を参照して説明する。図１は本実施の形態の切削工法で使用される複数種類の切削工具をガイド鋼線に取り付けた状態を示し、図２は図１に示される斜形替え刃型月形切削工具の構成を示し、図３は図２に示す斜形替え刃型月形切削工具のガイド鋼線への取り付けを示し、図４は図２に示す斜形替え刃型月形切削工具の断面を示し、図５は図１に示されるピン形切削工具の構成を示す。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a state in which a plurality of types of cutting tools used in the cutting method of the present embodiment are attached to a guide steel wire, and FIG. 2 shows the configuration of the slanted replaceable blade type moon cutting tool shown in FIG. FIG. 3 shows the attachment of the slanted-blade type lunar cutting tool shown in FIG. 2 to the guide steel wire, FIG. 4 shows the cross section of the slanting-blade type lunar cutting tool shown in FIG. 5 shows the configuration of the pin-shaped cutting tool shown in FIG.
まず図１乃至図４を参照して斜形替え刃型月形切削工具１の概略の構成について説明する。図２に示すように正面外観はいわゆる二つ巴の中心円状部分を重ねたような外観であり、板厚の本体（月形切削工具本体１１）から外周方向に替え刃取り付け部１５が突き出し、さらに月形切削工具本体１１に切り欠きを設け補助刃（斜形副切削刃１７）が形成された形状である。 First, a schematic configuration of the slanted replaceable blade type moon cutting tool 1 will be described with reference to FIGS. 1 to 4. As shown in FIG. 2, the front appearance is an appearance in which so-called two central circular portions are overlapped, and the replacement blade mounting portion 15 projects from the plate-shaped main body (moon-shaped cutting tool main body 11) in the outer peripheral direction. Further, the lunar cutting tool main body 11 has a notch and an auxiliary blade (an oblique sub-cutting blade 17) is formed.
以下、詳述する。斜形替え刃型月形切削工具１の月形切削工具本体１１は、金属製のほぼ円形の厚板、具体的には５ｍｍ〜２ｃｍ、好ましくは１ｃｍ程度の板厚の回転体を成形してなる。 Details will be described below. The lunar cutting tool body 11 of the slanted-blade type lunar cutting tool 1 is formed by forming a metal substantially circular thick plate, specifically, a rotating body having a plate thickness of about 5 mm to 2 cm, preferably about 1 cm. Become.
また、月形切削工具本体１１から中心軸に対象に２方向に突出して設けられる２つの替え刃取り付け部１５にはそれぞれ替え刃１５ａが替え刃留めねじ１５ｂでねじ留めされる。この替え刃１５ａは正面から見たとき正方形の替え刃１５ａの刃が中心軸に対して斜めになるようにかつ着脱自在に替え刃取り付け部１５に取り付けられる。なお図中ねじ孔１５ｃは、替え刃１５ａを替え刃取り付け部１５に取り付ける六角ねじ（六角穴付き止めボルト）である替え刃留めねじ１５ｂ用に穿孔ドリル等で穿孔し穿設されたねじ孔である。 In addition, a replacement blade 15a is screwed with a replacement blade retaining screw 15b to two replacement blade mounting portions 15 provided to project in two directions from the moon-shaped cutting tool body 11 toward the center axis. The replacement blade 15a is attached to the replacement blade mounting portion 15 so that the blade of the square replacement blade 15a is inclined with respect to the central axis when viewed from the front and is detachable. In the figure, the screw hole 15c is a screw hole that is drilled with a drill or the like for the replacement blade retaining screw 15b that is a hexagonal screw (hexagon socket set bolt) for attaching the replacement blade 15a to the replacement blade mounting portion 15. is there.
さらに月形切削工具本体１１から替え刃取り付け部１５への立ち上がり部分には、中心軸に所定の傾きを持った方向に切り欠きが設けられ、この切り欠き、すなわち斜形副切削刃１７が替え刃１５ａに対する補助刃として機能する。 Furthermore, a notch is provided in the rising portion from the moon-shaped cutting tool body 11 to the replacement blade mounting portion 15 in a direction having a predetermined inclination with respect to the central axis, and this notch, that is, the oblique sub-cutting blade 17 is replaced. It functions as an auxiliary blade for the blade 15a.
このような形状の斜形替え刃型月形切削工具１にあっては、まず主刃としての替え刃取り付け部１５に取り付けられた替え刃１５ａが被切削面を切削する。また、斜形副切削刃１７は斜形替え刃型月形切削工具１としての切削能力を高めるものであるが、替え刃１５ａが使用により刃面が摩耗したときに、替え刃１５ａを換えるまでの間、切削を補助することから、２つの意味で補助刃として機能するものである。 In the oblique replacement blade type moon cutting tool 1 having such a shape, first, the replacement blade 15a attached to the replacement blade attachment portion 15 as the main blade cuts the surface to be cut. The oblique sub-cutting blade 17 enhances the cutting ability of the oblique replaceable blade type moon-shaped cutting tool 1, but when the blade surface is worn by use of the replaceable blade 15a, the replacement blade 15a is changed. Since the cutting is assisted during this period, it functions as an auxiliary blade in two ways.
なお、この斜形替え刃型月形切削工具１の構造を単純にするために、替え刃取り付け部１５に取り付けられる替え刃１５ａと斜形副切削刃１７の刃の少なくとも一方の刃を斜めから中心軸に対して平行な平刃としても良い。 In order to simplify the structure of the oblique cutting blade type lunar cutting tool 1, at least one of the blades of the replacement blade 15a and the inclined sub cutting blade 17 attached to the replacement blade mounting portion 15 is obliquely arranged. A flat blade parallel to the central axis may be used.
また、月形切削工具本体１１の中心軸に対して対向する２つの位置に、後述する本体留めねじ１１ａ用のねじ孔を穿設するための、中心軸に離間しかつ平行な平面を厚板の板厚面（側面）に削り出し、さらに月形切削工具本体１１の中心軸の中心部分にガイド鋼線５を挿通するためのガイド鋼線通し孔１３を穿設する。次に、このガイド鋼線通し孔１３に挿通されるガイド鋼線５を留める六角ねじ（六角穴付き止めボルト）である本体留めねじ１１ａ用のねじ孔を前記削り出された平面に中心軸方向に直交してガイド鋼線通し孔１３まで貫通するように穿設し、このねじ孔に本体留めねじ１１ａを螺合する。 Further, a plane that is spaced apart from and parallel to the central axis for drilling a screw hole for a body retaining screw 11a, which will be described later, at two positions opposed to the central axis of the lunar cutting tool main body 11 is a thick plate. A guide steel wire through-hole 13 for inserting the guide steel wire 5 is drilled in the central portion of the central axis of the lunar cutting tool main body 11. Next, a screw hole for the main body fixing screw 11a, which is a hexagon screw (hexagon socket set bolt) for fastening the guide steel wire 5 inserted through the guide steel wire through hole 13, is formed in the direction of the central axis on the cut-out plane. The main body retaining screw 11a is screwed into this screw hole.
なお、本体留めねじ１１ａを螺合させたときに、ガイド鋼線５が太く本体留めねじ１１ａの頭部がねじ孔から突出するような場合であっても、図４に示されるように該本体留めねじ１１ａ用のねじ孔が前記削り出された平面に設けられていることから、本体留めねじ１１ａの頭部が被切削面に接触して摩耗することが防止される。 In addition, even when the guide steel wire 5 is thick and the head of the main body fixing screw 11a protrudes from the screw hole when the main body fixing screw 11a is screwed together, as shown in FIG. Since the screw hole for the set screw 11a is provided in the cut-out plane, the head of the main set screw 11a is prevented from coming into contact with the surface to be cut and being worn.
次に図５を参照してピン形切削工具３の概略の構成を説明する。 Next, a schematic configuration of the pin-type cutting tool 3 will be described with reference to FIG.
ピン形切削工具３は、直径２ｃｍ〜６ｃｍ、長さ３ｃｍ〜１０ｃｍ程度の金属製円柱体であるピン形切削工具本体３１と、切削部（切削刃）として機能する長さ１ｃｍ〜５ｃｍ程度の鋼製線材からなる多数の切削ピン３５によって構成される。このピン形切削工具本体３１の大きさは取り扱い、切削効率の点から直径２〜３ｃｍ、長さ３〜５ｃｍ程度であると良い。なお、切削ピン３５の長さは切削処理により摩耗し、短くなることから当初は長めにしておくと良い。 The pin-shaped cutting tool 3 includes a pin-shaped cutting tool body 31 that is a metal cylinder having a diameter of 2 cm to 6 cm and a length of about 3 cm to 10 cm, and a steel having a length of about 1 cm to 5 cm that functions as a cutting portion (cutting blade). It consists of a large number of cutting pins 35 made of wire-making material. The size of the pin-shaped cutting tool main body 31 is preferably about 2 to 3 cm in diameter and about 3 to 5 cm in length from the viewpoint of handling and cutting efficiency. In addition, since the length of the cutting pin 35 is worn and shortened by the cutting process, it is preferable to make it long at the beginning.
以下、ピン形切削工具３の構成を詳細に説明する。ピン形切削工具本体３１は中心軸に沿ってガイド鋼線通し孔３３が設けられ、また側面にはピン形切削工具本体３１をガイド鋼線５に固定するための六角ねじ（六角穴付き止めボルト）である本体留めねじ３１ａ用のねじ孔が穿設される。 Hereinafter, the configuration of the pin-shaped cutting tool 3 will be described in detail. The pin-shaped cutting tool body 31 is provided with a guide steel wire through-hole 33 along the central axis, and a hexagonal screw (hexagon socket set bolt for fixing the pin-shaped cutting tool body 31 to the guide steel wire 5 on the side surface. ) Which is the main body fixing screw 31a.
またピン形切削工具本体３１の上面と下面にはそれぞれ切削ピン３５、切削ピン３７を着脱自在に固定する切削ピン留めねじ３５ａ（３７ａ；図示してない）用のねじ孔が穿設される。すなわち切削ピン３５（切削ピン３７）が摩耗した際には、切削ピン留めねじ３５ａ（３７ａ）を緩め、摩耗した切削ピン３５を抜き外し、交換用の切削ピン３５を差込み、その後、切削ピン留めねじ３５ａを締め込み、切削ピン留めねじ３５ａをピン形切削工具本体３１に固定する。従って切削ピン３５（切削ピン３７）の数だけ切削ピン留めねじ３５ａ（３７ａ）が設けられることになる。 Further, screw holes for cutting pin retaining screws 35a (37a; not shown) for detachably fixing the cutting pins 35 and 37 are formed in the upper and lower surfaces of the pin-shaped cutting tool body 31, respectively. That is, when the cutting pin 35 (cutting pin 37) is worn, the cutting pin fastening screw 35a (37a) is loosened, the worn cutting pin 35 is removed, and the replacement cutting pin 35 is inserted, and then the cutting pin fastening is performed. The screw 35 a is tightened, and the cutting pin fastening screw 35 a is fixed to the pin-shaped cutting tool body 31. Accordingly, as many cutting pin fastening screws 35a (37a) as the number of cutting pins 35 (cutting pins 37) are provided.
次に、このようにして作成された斜形替え刃型月形切削工具１およびピン形切削工具３（以下、単に切削工具１、３ともいう）を図１に示す順序にてガイド鋼線５に取り付ける。図１ではガイド鋼線５Ａに斜形替え刃型月形切削工具１Ａ−ピン形切削工具３Ａ−ピン形切削工具３Ｂ−斜形替え刃型月形切削工具１Ｂ−ピン形切削工具３Ｃ−ピン形切削工具３Ｄ−斜形替え刃型月形切削工具１Ｃ〜接続具７〜が順次、嵌装された場合を示しているが、適宜、任意の順番で嵌装しても良いのは言うまでもないことである。 Next, the oblique replaceable blade type moon cutting tool 1 and the pin-shaped cutting tool 3 (hereinafter also simply referred to as cutting tools 1 and 3) thus prepared are guided steel wires 5 in the order shown in FIG. Attach to. In FIG. 1, the guide steel wire 5A has an oblique replacement blade type moon cutting tool 1A-pin type cutting tool 3A-pin type cutting tool 3B-slant replacement blade type moon cutting tool 1B-pin type cutting tool 3C-pin type. Although the cutting tool 3D-slanting blade type lunar cutting tool 1C to connecting tool 7 are shown sequentially fitted, it goes without saying that they may be fitted in any order as appropriate. It is.
例えば、斜形替え刃型月形切削工具１Ａ−斜形替え刃型月形切削工具１Ｂ−ピン形切削工具３Ａ−ピン形切削工具３Ｂ−斜形替え刃型月形切削工具１Ｃ−斜形替え刃型月形切削工具１Ｄ−ピン形切削工具３Ｃ−ピン形切削工具３Ｄ−のように同型の切削工具を同数ずつ繰り返すように配列しても良く、あるいは斜形替え刃型月形切削工具１Ａ−ピン形切削工具３Ａ−ピン形切削工具３Ｂ−〜−ピン形切削工具３−斜形替え刃型月形切削工具１Ｂ−ピン形切削工具３−ピン形切削工具３−〜−ピン形切削工具３−斜形替え刃型月形切削工具１Ｃのように配列しても良く、さらには斜形替え刃型月形切削工具１のみ、もしくはピン形切削工具３のみで構成するようにしても良い。 For example, the slanted-blade type moon cutting tool 1A-the slant-shaped blade-shaped moon cutting tool 1B-the pin-shaped cutting tool 3A-the pin-shaped cutting tool 3B-the slant-shaped blade-shaped lunar cutting tool 1C-the slant-shaped tool. A blade-type lunar cutting tool 1D—a pin-shaped cutting tool 3C—a pin-shaped cutting tool 3D—may be arranged so that the same number of cutting tools are repeated one by one, or a slanted-blade blade-shaped moon cutting tool 1A -Pin-shaped cutting tool 3A-Pin-shaped cutting tool 3B---Pin-shaped cutting tool 3- Slant blade type lunar cutting tool 1B-Pin-shaped cutting tool 3- Pin-shaped cutting tool 3---Pin-shaped cutting tool 3- It may be arranged like a slanted-blade blade-type lunar cutting tool 1C, and it may be composed of only the slant-shaping blade-shaped lunar cutting tool 1 or only the pin-shaped cutting tool 3. .
通常は斜形替え刃型月形切削工具１は、硬いノロＮに適しており、ピン形切削工具３は比較的柔らかいノロＮに適している。 In general, the slanted-blade-type moon-shaped cutting tool 1 is suitable for hard Noro N, and the pin-type cutting tool 3 is suitable for relatively soft Noro N.
ガイド鋼線５は取り扱い易さの点で本実施形態では、長さ２ｍ程度の鋼撚り線（３号）としているが、切削対象に応じて、例えばガイド鋼線５を回転駆動したときに、ガイド鋼線５に取り付けられた切削工具１が電柱内部の障害物を切削可能な長さであれば良く、そのため電柱長（実際には電柱内部中空部分の長さ）とほぼ同じ長さとしても良い。 In this embodiment, the guide steel wire 5 is a steel stranded wire having a length of about 2 m (No. 3) in terms of ease of handling, but when the guide steel wire 5 is rotationally driven, for example, depending on the cutting target, The cutting tool 1 attached to the guide steel wire 5 only needs to be long enough to cut an obstacle inside the utility pole, and therefore even if the length is almost the same as the length of the utility pole (actually the length of the hollow portion inside the utility pole). good.
この場合、図１に示すように所定長のガイド鋼線５に予め切削工具１、３を装着しておき、必要な長さに応じてガイド鋼線５を接続具７で接続する。 In this case, as shown in FIG. 1, cutting tools 1 and 3 are mounted in advance on a guide steel wire 5 having a predetermined length, and the guide steel wire 5 is connected by a connector 7 according to a required length.
また、鋼撚り線としてはは、後述するように通常はボビンに巻回されて流通されている鋼撚り線の巻き癖を切削時に利用することから、巻き癖を利用するための硬性の点で鋼撚り線の４号程度を用いた方が取り扱いが容易でもあり好ましい。 In addition, as a steel stranded wire, a steel stranded wire wound around a bobbin is normally used at the time of cutting, as will be described later. It is preferable to use about No. 4 steel stranded wire because it is easy to handle.
なお、ガイド鋼線５の両端にはガイド鋼線５（撚り線）がほぐれるのを防止するために針金等を巻回してほう縛したほう縛部を設ける。 In addition, in order to prevent the guide steel wire 5 (twisted wire) from being loosened at both ends of the guide steel wire 5, a binding portion is provided by winding and binding a wire or the like.
次に、上述した切削工具１、３を用いた切削工法について図面を参照して説明する。図６は切削用モータＭの鋼管柱Ｐの頂部への取り付けを示し、図７は切削工具１、３を取り付けたガイド鋼線５を切削用モータＭに接続する状態を示し、図８は切削用モータＭを上下方向に移動して、ガイド鋼線５に取り付けた切削工具１、３を電柱内部で上下方向に移動する状態を示し、図９は切削工具１、３を取り付けたガイド鋼線５を電柱内部で回転駆動して電柱内部のノロＮを切削している状態を示す図である。 Next, the cutting method using the cutting tools 1 and 3 described above will be described with reference to the drawings. FIG. 6 shows the attachment of the cutting motor M to the top of the steel pipe column P, FIG. 7 shows the state where the guide steel wire 5 to which the cutting tools 1 and 3 are attached is connected to the cutting motor M, and FIG. FIG. 9 shows a state in which the cutting motors 1 and 3 attached to the guide steel wire 5 are moved up and down inside the utility pole, and FIG. 9 shows the guide steel wire to which the cutting tools 1 and 3 are attached. It is a figure which shows the state which rotationally drives 5 inside a utility pole, and is cutting the Noro N inside a utility pole.
まず、図６を参照するに、鋼管柱Ｐの頂部に台座受け台Ｓを取り付ける。図では鋼管柱頂部に筒状の台座受け台Ｓを被せた後に、該台座受け台Ｓを鋼管柱にボルト等により固定するものを示しているが、切削用モータＭの昇降用台座３０を鋼管柱頂部に取り付けられればいいのであるから、例えば金属製の着脱自在の取り付けバンド等であっても良い。なお、本実施形態においては、立設された既設の鋼管柱を想定して説明するが、同様に立設された電柱でもよく、あるいは地中にほぼ水平に埋設された鋼管またはコンクリート管であっても同様に作業を進めることが出来、同様の効果を得ることが出来るのは言うまでも無い。 First, referring to FIG. 6, a pedestal base S is attached to the top of the steel pipe column P. In the figure, the cylindrical pedestal pedestal S is placed on the top of the steel pipe column, and then the pedestal pedestal S is fixed to the steel pipe column with bolts or the like. Since it only needs to be attached to the top of the column, it may be a metal detachable attachment band, for example. In the present embodiment, the description will be given on the assumption that an existing steel pipe column is erected, but it may be a similarly installed electric pole, or a steel pipe or a concrete pipe buried substantially horizontally in the ground. However, it goes without saying that the same work can be performed and the same effect can be obtained.
次に、この台座受け台Ｓに昇降用台座３０を取り付ける。この昇降用台座３０は、台座受け台Ｓにボルトで取り付けるための台状の台座取り付け部３１と、この台座取り付け部３１に立設される昇降軸部３３と、この昇降軸３３をなめらかに昇降可能に取り付けられるモータ取り付け架台３５と、切削用モータＭを載置したモータ取り付け架台３５を手動にて上下方向に昇降するためのモータ昇降用ハンドル３５ａと、昇降軸３３をなめらかに昇降可能に取り付けられ、かつ後述する接続軸９を例えば転がり軸受ユニット等のベアリング機構により回動自在に支持する支軸部３７により構成される。 Next, the elevating pedestal 30 is attached to the pedestal cradle S. The elevating pedestal 30 includes a pedestal pedestal mounting portion 31 for mounting on the pedestal cradle S with bolts, an elevating shaft portion 33 standing on the pedestal mounting portion 31, and the elevating shaft 33 smoothly moving up and down. A motor mount 35 that can be mounted, a motor lift handle 35a for manually lifting the motor mount 35 on which the cutting motor M is mounted, and a lift shaft 33 are mounted so that the lift shaft 33 can be lifted smoothly. And a support shaft portion 37 that rotatably supports a connection shaft 9 described later by a bearing mechanism such as a rolling bearing unit.
次に、予め前処理として、図１に示すように複数の切削工具１、３が取り付けられたガイド鋼線５と接続軸９とを接続具７Ａを用いて取り付けておく。この接続具７Ａは、６角棒状の接続軸９と撚り線である鋼撚り線５とを接続し得る形状である。続いて前処理の済んだ接続軸９を支軸部３７を通した後、図７，８に示すように支軸部３７の上端部を切削用モータＭの回転軸にチャックを介して接続する。 Next, as a pretreatment, as shown in FIG. 1, a guide steel wire 5 to which a plurality of cutting tools 1 and 3 are attached and a connecting shaft 9 are attached using a connecting tool 7A. 7 A of this connection tool is a shape which can connect the hexagonal rod-shaped connection shaft 9 and the steel strand wire 5 which is a strand wire. Subsequently, after the pre-processed connecting shaft 9 is passed through the support shaft portion 37, the upper end portion of the support shaft portion 37 is connected to the rotating shaft of the cutting motor M via a chuck as shown in FIGS. .
次に、図８に示すように、モータ昇降用ハンドル３５ａを使用して、切削用モータＭの昇降が支障無く、行えることを確認しておく。このとき鋼管柱Ｐの中空部分の中心に接続軸９が位置するように調整しておく。 Next, as shown in FIG. 8, it is confirmed using the motor lifting handle 35a that the cutting motor M can be lifted and lowered without hindrance. At this time, adjustment is made so that the connecting shaft 9 is positioned at the center of the hollow portion of the steel pipe column P.
次に、切削作業を開始する。この切削作業は図８に示すように、モータ昇降用ハンドル３５ａを操作して、切削用モータＭの昇降しながら行う。 Next, the cutting operation is started. As shown in FIG. 8, this cutting operation is performed while operating the motor lifting handle 35a and moving the cutting motor M up and down.
以下、詳細に説明する。まず、モータ昇降用ハンドル３５ａを操作して、切削用モータＭを最下段まで下げた後に、切削用モータＭを回転駆動させて、切削を開始する（図９参照）。切削はモータ昇降用ハンドル３５ａを操作して、下段から上段へ、例えば５ｃｍずつ移動しながら、各５分づつ行う。この移動量と切削時間はのろＮの付着状況により適宜変更する。また、この昇降移動の間、切削用モータＭは停止させない。このようにして、切削用モータＭが最上段まで移動が完了した時点で１次切削を終了する。 Details will be described below. First, the motor lifting handle 35a is operated to lower the cutting motor M to the lowest stage, and then the cutting motor M is rotationally driven to start cutting (see FIG. 9). Cutting is performed every 5 minutes while operating the motor elevating handle 35a and moving from the lower stage to the upper stage by, for example, 5 cm. The amount of movement and the cutting time are appropriately changed depending on the state of adhesion of the sludge N. Moreover, the motor M for cutting is not stopped during this raising / lowering movement. Thus, primary cutting is complete | finished when the motor M for cutting is completed to the uppermost stage.
続いて、２次切削を開始する。この２次切削は１次切削完了後に、一旦、切削用モータＭの回転を止め、再度、切削用モータＭを最下段まで下げた後に、切削用モータＭを回転駆動させて、２次切削を開始する。切削は１次切削と同様にモータ昇降用ハンドル３５ａを操作して、下段から上段へ５ｃｍずつ移動しながら、各３分づつ行う。この移動量と切削時間は１次切削後ののろＮの付着状況により適宜、例えば３ｃｍ毎に４分のごとく変更する。この昇降移動の間、切削用モータＭは停止させない。このようにして、切削用モータＭが最上段まで移動が完了した時点で２次切削を終了する。 Subsequently, secondary cutting is started. In the secondary cutting, after the primary cutting is completed, the cutting motor M is stopped once. After the cutting motor M is lowered to the lowest stage again, the cutting motor M is rotationally driven to perform the secondary cutting. Start. The cutting is performed every 3 minutes while operating the motor lifting handle 35a in the same way as the primary cutting and moving from the lower stage to the upper stage by 5 cm. The amount of movement and the cutting time are appropriately changed, for example, every 3 cm, every 4 minutes, depending on the state of adhesion of the filter N after the primary cutting. During this up-and-down movement, the cutting motor M is not stopped. In this way, the secondary cutting is finished when the cutting motor M is completely moved to the uppermost stage.
なお、切削用モータＭの回転数やガイド鋼線５の長さ、鋼撚り線の巻き癖等により、切削工具１、３が取り付けられたガイド鋼線５全体が大きな弧を描いて周期的にのろＮを削り取るようにもできる。 The entire guide steel wire 5 to which the cutting tools 1 and 3 are attached draws a large arc periodically depending on the number of rotations of the cutting motor M, the length of the guide steel wire 5, the winding wire of the steel stranded wire, and the like. You can also scrape off the N.
なお、本発明の切削対象は鋼管柱に限定されることなく、例えば電柱や煙突等にも適用可能である。 Note that the object to be cut of the present invention is not limited to a steel pipe column, and can be applied to, for example, a utility pole or a chimney.
なお、以上の説明では、刃型月形切削工具１とピン形切削工具３を使用した場合を示したが、適宜、任意の切削工具、例えば図１０に示す斜形複刃切欠付き月形切削工具１０１や、図１１に示す平形複刃月形切削工具２０１、あるいは図１２に示す斜単刃月形切削工具３０１等を使用するようにしても良いのは言うまでもないことである。 In the above description, the case where the blade-type lunar cutting tool 1 and the pin-shaped cutting tool 3 are used is shown. However, an arbitrary cutting tool, for example, the moon-shaped cutting with an oblique double-blade notch shown in FIG. Needless to say, the tool 101, the flat double-edged moon cutting tool 201 shown in FIG. 11, or the oblique single-edged moon cutting tool 301 shown in FIG. 12 may be used.
次に、図１０，１１，１２を参照して、斜形複刃切欠付き月形切削工具１０１、平形複刃月形切削工具２０１、および斜単刃月形切削工具３０１について説明する。 Next, with reference to FIGS. 10, 11, and 12, the moon cutting tool 101 with the oblique double-blade notch, the flat double-blade moon cutting tool 201, and the oblique single-blade moon cutting tool 301 will be described.
まず図１０を参照するに斜形複刃切欠付き月形切削工具１０１の概略の正面外観はいわゆる二つ巴の中心円状部分を重ねたような外観であり、具体的には５ｍｍ〜２ｃｍ、好ましくは１ｃｍ程度の板厚の鋼製回転板（月形切削工具本体１１１）から外周方向に切削刃（斜形切欠付き主切削刃１１５）が突出し、さらに月形切削工具本体１１１に切り欠きを設け補助刃（斜形副切削刃１１７）が形成された形状である。 First, referring to FIG. 10, the rough front appearance of the lunar cutting tool 101 with a slanted double-blade notch is an appearance in which a so-called two-centered circular portion is overlapped, specifically 5 mm to 2 cm, Preferably, a cutting blade (main cutting blade 115 with an oblique notch) protrudes from the steel rotating plate (moon-shaped cutting tool main body 111) having a thickness of about 1 cm in the outer peripheral direction, and further the notch is formed in the moon-shaped cutting tool main body 111. It is the shape in which the provided auxiliary blade (the oblique sub-cutting blade 117) is formed.
さらに詳しくは、斜形複刃切欠付き月形切削工具１０１の月形切削工具本体１１１は、ほぼ円形の厚板からなり、この月形切削工具本体１１１の中心軸に対して対向する位置に後述するねじ孔を穿設するための中心軸に離間しかつ平行な平面を厚板の板厚面（側面）に削り出し、さらに中心軸中心部分にガイド鋼線５を挿通するためのガイド鋼線通し孔１１３を設けた後に、このガイド鋼線通し孔１１３に挿通されるガイド鋼線５を留める六角ねじ（六角穴付き止めボルト）である本体留めねじ１１１ａ用のねじ孔が前記削り出された平面に中心軸方向に直交しガイド鋼線通し孔１１３まで貫通するように穿設される。 More specifically, the lunar cutting tool main body 111 of the lunar cutting tool 101 with the oblique double-blade notch is made of a substantially circular thick plate, and will be described later at a position facing the central axis of the lunar cutting tool main body 111. A guide steel wire for cutting out a plane that is spaced apart and parallel to the central axis for drilling a screw hole to be cut into the plate thickness surface (side surface) of the thick plate and that further passes the guide steel wire 5 through the central axis central portion After providing the through hole 113, the screw hole for the main body fixing screw 111a which is a hexagon screw (hexagon socket set bolt) for fastening the guide steel wire 5 inserted into the guide steel wire through hole 113 was cut out. It is drilled so as to penetrate to the plane perpendicular to the central axis direction to the guide steel wire through hole 113.
また、月形切削工具本体１１１から中心軸に対象に２方向に突出して設けられる２つの斜形切欠付き主切削刃１１５の刃は中心軸に対して斜めになるように形成され、さらに斜形切欠付き主切削刃１１５の斜め刃部分には、中心軸に直交する方向に切り欠かれた切り欠き１１５ａが設けられる。 Further, the blades of the two main cutting blades 115 with the oblique notch provided so as to project from the moon-shaped cutting tool body 111 toward the target in two directions on the central axis are formed so as to be inclined with respect to the central axis. A notch 115a that is notched in a direction perpendicular to the central axis is provided on the oblique blade portion of the notched main cutting blade 115.
また月形切削工具本体１１１から斜形切欠付き主切削刃１１５への立ち上がり部分には、中心軸に所定の傾きを持った方向に切り欠きが設けられ、この切り欠き、すなわち斜形副切削刃１１７が斜形切欠付き主切削刃１１５に対する補助刃として機能する。 In addition, a notch is provided at a rising portion from the moon-shaped cutting tool main body 111 to the main cutting blade 115 with the oblique notch in a direction having a predetermined inclination with respect to the central axis, that is, the oblique sub-cutting blade. Reference numeral 117 functions as an auxiliary blade for the main cutting blade 115 with the oblique notch.
このような形状の斜形複刃切欠付き月形切削工具１０１は、まず主刃としての斜形切欠付き主切削刃１１５が被切削面を切削する際に、切り欠き１１５ａが斜形切欠付き主切削刃１１５に、さらに２カ所の鋭角部分を与えることから切削能力をさらに高めることになる。また、斜形副切削刃１１７も同様に切削能力を高めるが、斜形副切削刃１１７は使用により斜形切欠付き主切削刃１１５の刃面が摩耗したときに替わって切削を行うことから、２つの意味で補助刃として機能するものである。 In the moon-shaped cutting tool 101 with the oblique double-blade notch having such a shape, when the main cutting blade 115 with the oblique notch as the main blade first cuts the surface to be cut, the notch 115a is the main with the oblique notch. Since the cutting blade 115 is further provided with two acute angle portions, the cutting ability is further enhanced. The oblique sub-cutting blade 117 similarly increases the cutting ability, but the oblique sub-cutting blade 117 performs cutting instead of when the blade surface of the main cutting blade 115 with the oblique notch is worn by use. It functions as an auxiliary blade in two ways.
この斜形複刃切欠付き月形切削工具１０１は、上述した斜形替え刃型月形切削工具１に比して構造が単純であることから、斜形替え刃型月形切削工具１に比べると製造が容易であり、そのため廉価である。さらに構造を単純にするために、斜形切欠付き主切削刃１１５と斜形副切削刃１１７の刃の少なくとも一方の刃を斜めから中心軸に対して平行な平刃としても良い。 The slanted double-blade notched lunar cutting tool 101 has a simpler structure than the above-described slanted-replaceable-blade type lunar cutting tool 1, and is therefore compared to the slanted-replaceable-blade monthly cutting tool 1. And easy to manufacture and therefore inexpensive. Further, in order to simplify the structure, at least one of the oblique cutting main cutting blade 115 and the oblique sub cutting blade 117 may be a flat blade that is parallel to the central axis from an oblique direction.
次に、平形複刃月形切削工具２０１について、図１１を参照して説明する。
この平形複刃月形切削工具２０１は、上述した斜形複刃切欠付き月形切削工具１０１の切り欠き１１５ａを設けず、さらに平形主切削刃２１５と平形副切削刃２１７の両方の刃を中心軸に平行な平刃としただけの差異であることから、詳細な説明を省略する。
Next, the flat double-edged moon cutting tool 201 will be described with reference to FIG.
This flat double-blade moon cutting tool 201 is not provided with the notch 115a of the above-described slanted double-blade notched moon cutting tool 101, and is centered on both the flat main cutting blade 215 and the flat secondary cutting blade 217. Since the difference is only a flat blade parallel to the axis, detailed description is omitted.
なお、月形切削工具本体２１１は月形切削工具本体１１１に、本体留めねじ２１１ａは本体留めねじ１１１ａに、ガイド鋼線通し孔２１３はガイド鋼線通し孔１１３に、平形主切削刃２１５は斜形切欠付き主切削刃１１５に、平形副切削刃２１７は斜形副切削刃１１７にそれぞれ対応する。 The moon-shaped cutting tool body 211 is connected to the moon-shaped cutting tool body 111, the body retaining screw 211a is connected to the body retaining screw 111a, the guide steel wire passage hole 213 is connected to the guide steel wire passage hole 113, and the flat main cutting blade 215 is inclined. The flat secondary cutting blade 217 corresponds to the main cutting blade 115 with a shape notch, and the oblique secondary cutting blade 117 corresponds to the oblique secondary cutting blade 117, respectively.
次に、最も単純な斜単刃月形切削工具３０１について、図１２を参照して説明する。正面外観はいわゆる二つ巴の中心円状部分を重ねたような外観であり、具体的には５ｍｍ〜２ｃｍ、好ましくは１ｃｍ程度の板厚の回転板（月形切削工具本体３１１）から外周方向に切削刃（斜形主切削刃３１５）が突出する形状である。 Next, the simplest oblique single-blade moon cutting tool 301 will be described with reference to FIG. The front appearance is an appearance in which the so-called two-centered circular part is overlapped, specifically from the rotating plate (moon-shaped cutting tool body 311) having a thickness of about 5 mm to 2 cm, preferably about 1 cm, in the outer circumferential direction. The cutting blade (oblique main cutting blade 315) protrudes.
すなわち、斜単刃月形切削工具３０１は月形切削工具本体３１１の中心軸中心部分にガイド鋼線５を挿通するためのガイド鋼線通し孔３１３が設けられ、このガイド鋼線通し孔３１３に挿通されるガイド鋼線５を留める六角ねじ（六角穴付き止めボルト）である本体留めねじ３１１ａ用のねじ孔が中心軸方向に直交して設けられる。また、月形切削工具本体３１１から中心軸に対象に突出して設けられる２つの斜形主切削刃３１５の刃は中心軸に対して斜めになるように形成される。 That is, the oblique single-blade moon cutting tool 301 is provided with a guide steel wire through-hole 313 for inserting the guide steel wire 5 in the central portion of the central axis of the moon cutting tool main body 311. A screw hole for a main body fixing screw 311a which is a hexagonal screw (hexagonal socket set bolt) for fastening the inserted guide steel wire 5 is provided perpendicular to the central axis direction. Further, the blades of the two oblique main cutting blades 315 provided to project from the moon-shaped cutting tool body 311 to the center axis are formed so as to be inclined with respect to the center axis.
この斜単刃月形切削工具３０１は、構造が単純であることから、製造が容易であり、そのため廉価である。さらに構造を単純にする場合は、刃を斜めから中心軸に対して平行な平刃とする。 The slanted single-blade moon cutting tool 301 is simple in structure and therefore easy to manufacture and is therefore inexpensive. Furthermore, when the structure is simplified, the blade is a flat blade parallel to the central axis from an oblique direction.
なお、上述した各切削刃は、焼き入れを行う、付け刃処理を行う、耐摩耗性、強度、耐食性に優れた超硬合金を粉末冶金により製造する等の製造・処理を含め、その他のさまざまな条件に応じて適宜、形状や製造・処理方法を変更することが可能である。 In addition, each of the cutting blades described above includes various other processes including manufacturing and processing such as quenching, performing cutting blade processing, and manufacturing cemented carbide excellent in wear resistance, strength, and corrosion resistance by powder metallurgy. It is possible to change the shape and manufacturing / processing method as appropriate according to various conditions.
１…斜形替え刃型月形切削工具
３…ピン形切削工具
５…ガイド鋼線
７…接続具
９…接続用軸
１１…月形切削工具本体
１１ａ…本体留めねじ
１３…ガイド鋼線通し孔
１５…替え刃取り付け部
１５ａ…替え刃
１５ｂ…替え刃留めねじ
１５ｃ…ねじ孔
１７…斜形副切削刃
３１…ピン形切削工具本体
３１ａ…本体留めねじ
３３…ガイド鋼線通し孔
３５…切削ピン
３５ａ…切削ピン留めねじ
３７…切削ピン
１０１…斜形複刃切欠付き月形切削工具
１１１…月形切削工具本体
１１１ａ…本体留めねじ
１１３…ガイド鋼線通し孔
１１５…斜形切欠付き主切削刃
１１５ａ…切り欠き
１１７…斜形副切削刃
２０１…平形複刃月形切削工具
２１１…月形切削工具本体
２１１ａ…本体留めねじ
２１３…ガイド鋼線通し孔
２１５…平形主切削刃
２１７…平形副切削刃
３０１…斜単刃月形切削工具
３１１…月形切削工具本体
３１１ａ…本体留めねじ
３１３…ガイド鋼線通し孔
３１５…斜形主切削刃
Ｍ…モータ
Ｓ…受け台
Ｐ…電柱
DESCRIPTION OF SYMBOLS 1 ... Slant blade type moon cutting tool 3 ... Pin type cutting tool 5 ... Guide steel wire 7 ... Connecting tool 9 ... Connecting shaft 11 ... Moon cutting tool main body 11a ... Body retaining screw 13 ... Guide steel wire through-hole DESCRIPTION OF SYMBOLS 15 ... Replacement blade attaching part 15a ... Replacement blade 15b ... Replacement blade retaining screw 15c ... Screw hole 17 ... Oblique sub cutting blade 31 ... Pin type cutting tool main body 31a ... Main body retaining screw 33 ... Guide steel wire through-hole 35 ... Cutting pin 35a ... Cutting pin retaining screw 37 ... Cutting pin 101 ... Lunar cutting tool body 111 with oblique double-blade notch 111 ... Lunar cutting tool body 111a ... Body retaining screw 113 ... Guide steel wire through hole 115 ... Main cutting blade with oblique notch 115a ... notch 117 ... oblique sub cutting blade 201 ... flat double-blade moon cutting tool 211 ... moon cutting tool body 211a ... main body retaining screw 213 ... guide steel wire through hole 215 ... flat main cutting blade 217 ... flat sub cutting Blade 3 1 ... swash single blade moon shaped cutting tool 311 ... moon cutting tool main body 311a ... body screwed 313 ... guide steel wire through holes 315 ... diagonal main cutting edge M ... motor S ... cradle P ... utility pole
Claims (7)
前記ガイド鋼線を切削工具本体の中心軸とするときに、該中心軸を中心とする円周に沿って配置される複数の切削刃と、
前記切削工具本体をガイド鋼線に着脱自在に固定するための固定部と
を有することを特徴とする切削工具。 A cutting tool for performing the cutting inside the hollow portion of the columnar structure by fixing it to the guide steel wire,
When the guide steel wire is the central axis of the cutting tool body, a plurality of cutting blades arranged along a circumference centered on the central axis;
A cutting tool comprising: a fixing portion for removably fixing the cutting tool body to a guide steel wire.
この電動機の回転駆動により当該ガイド鋼線をに取り付けられた切削工具を回転駆動することを特徴とする請求項５または６のいずれかに記載の切削方法。 One end of the guide steel wire is connected to the rotating shaft of the electric motor via a connecting means,
7. The cutting method according to claim 5, wherein the cutting tool attached to the guide steel wire is rotationally driven by the rotational drive of the electric motor.
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| CN111132785A (en) * | 2017-09-22 | 2020-05-08 | 肯纳金属公司 | Machining tool, machining device and method for machining a workpiece |
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| CN111132785B (en) * | 2017-09-22 | 2023-08-11 | 肯纳金属公司 | Machining tool, machining apparatus and method for machining a workpiece |
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