JP2007154526A - Excavation tip and excavation tool - Google Patents

Excavation tip and excavation tool Download PDF

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JP2007154526A
JP2007154526A JP2005351992A JP2005351992A JP2007154526A JP 2007154526 A JP2007154526 A JP 2007154526A JP 2005351992 A JP2005351992 A JP 2005351992A JP 2005351992 A JP2005351992 A JP 2005351992A JP 2007154526 A JP2007154526 A JP 2007154526A
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excavation
tip
claw
ground
blade
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Morio Kitamura
北村　　精男
Teruo Nagayama
輝夫 長山
Yoshio Tsuzuki
良夫 都築
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Giken Seisakusho Co Ltd
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Giken Seisakusho Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a excavation tip which is proof against formation of a built-up edge, and carries out excellent excavation, and to provide an excavation tool. <P>SOLUTION: The excavation tip 10 for excavating the ground is formed such that an excavating blade 122a of an excavation tip 122 held by a tip holding section 121 of the excavation tip 10, has an outflow hole 5 formed therein, and then the excavation tool 1 on which the excavation tip 10 is mounted has formed therein a feeding channel 41 for feeding a predetermined fluid flowing out of the outflow hole 5. When the ground is dug by using the excavation tool 1 on which the excavation tip 10 is held, the predetermined fluid is made to flow from the outflow hole 5 formed in the excavation tip 10 to eliminate excavating muck of the ground including rock powder, or the excavating blades (121a, 122a) of the excavation tip 10 or the ground surface excavated by the excavation tip 10 is cooled. In this manner the excavation tip 10 hardly forms the built-up edge. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、地盤を掘削する掘削爪及び掘削工具に関する。   The present invention relates to excavation claws and excavation tools for excavating the ground.

従来、地盤を掘削して縦穴を形成する掘削装置として、例えば、アースオーガが知られている。
このアースオーガに設けられているオーガスクリューの先端部には、地盤を掘削するオーガヘッドが接続されており、オーガヘッドには掘削爪を備えた掘削工具が接続されている（例えば、特許文献１参照。）。
特開２００４−２７８２５３号公報 Conventionally, for example, an earth auger is known as an excavator that excavates the ground to form a vertical hole.
An auger head for excavating the ground is connected to the tip of the auger screw provided in the earth auger, and an excavation tool having excavation claws is connected to the auger head (for example, Patent Document 1). reference.).
JP 2004-278253 A

しかしながら、上述のような掘削工具を用いて地盤を掘削する場合に、掘削スピード（オーガスクリューの回転速度）が所定速度以上になると、図６（ａ）、（ｂ）に示すように、掘削爪１００の底部である逃げ面に掘削した岩石粉が強固に付着してなる構成刃先Ｋが形成されてしまうことがある。
掘削爪１００に構成刃先Ｋが形成されてしまうと、掘削爪１００が地盤Ｇに直接当たらなくなることや、掘削爪１００と地盤Ｇの間の逃げ角が小さくなり掘削爪１００の地盤Ｇへの喰い込みが悪くなることに伴って、掘削効率が悪化してしまうという問題があった。
また、掘削爪１００の地盤Ｇへの喰い込みが悪くなると益々構成刃先Ｋが大きくなりやすく、肥大化してしまった構成刃先Ｋによって掘削不可能になってしまうことがあるという問題があった。
また、掘削スピードを遅くすると、構成刃先Ｋは形成され難いが、掘削時間がかかってしまうため、掘削効率が悪化してしまうという問題があった。 However, when excavating the ground using the excavation tool as described above, if the excavation speed (the rotation speed of the auger screw) is equal to or higher than a predetermined speed, as shown in FIGS. The component cutting edge K which the rock powder excavated to the flank which is the bottom part of 100 adheres firmly may be formed.
When the cutting edge K is formed on the excavation claw 100, the excavation claw 100 does not directly contact the ground G, or the clearance angle between the excavation claw 100 and the ground G becomes small, and the excavation claw 100 bites into the ground G. There was a problem that excavation efficiency deteriorated as the drilling became worse.
Further, when the excavation nail 100 bites into the ground G worsens, there is a problem that the constituent cutting edge K is likely to become larger and the excavation becomes impossible due to the enlarged constituent cutting edge K.
Further, when the excavation speed is slowed, the component cutting edge K is difficult to be formed, but it takes a long time to excavate, and there is a problem that the excavation efficiency is deteriorated.

本発明の目的は、構成刃先が形成され難く、良好な掘削を可能とする掘削爪及び掘削工具を提供することである。   An object of the present invention is to provide an excavation claw and an excavation tool that enable good excavation without forming a cutting edge.

以上の課題を解決するため、請求項１に記載の発明は、掘削爪であって、例えば、図１〜図５に示すように、掘削刃（１２２ａ）を有する掘削チップ（１２２）と、
前記掘削チップを保持するチップ保持部（１２１）と、を備え、地盤を掘削する掘削爪（１０）であって、
前記掘削チップと前記チップ保持部の少なくとも一方に、前記地盤に向けて所定の流体を流出するための流出孔（５，６，７）が設けられていることを特徴とする。 In order to solve the above problems, the invention described in claim 1 is a excavation claw, for example, as shown in FIGS. 1 to 5, an excavation tip (122) having an excavation blade (122a),
A tip holding part (121) for holding the excavation tip, and a excavation claw (10) for excavating the ground,
At least one of the excavation tip and the tip holding part is provided with outflow holes (5, 6, 7) for allowing a predetermined fluid to flow out toward the ground.

請求項１に記載の発明によれば、地盤を掘削する掘削爪における掘削チップとチップ保持部の少なくとも一方に流出孔が設けられており、その流出孔から地盤に向けて所定の流体を流出することができる。
つまり、掘削爪が地盤や岩盤を掘削する際に、所定の流体を掘削爪の流出孔から流出させて、岩石粉などの地盤の削り粉を除去するように移動させてしまえば、掘削爪に岩石粉などは付着し難くなるので、掘削爪に構成刃先が形成され難くなる。また、掘削爪の流出孔から流出された流体によって、掘削爪の掘削刃や、掘削爪によって削られる地盤面を冷却することによっても、構成刃先の形成を抑制することができる。
よって、地盤に向けて所定の流体を流出する流出孔を有する掘削爪であれば、その掘削爪に構成刃先は形成され難く、良好な掘削を行うことが可能となる。 According to the first aspect of the present invention, the outflow hole is provided in at least one of the excavation tip and the tip holding portion in the excavation claw for excavating the ground, and a predetermined fluid flows out from the outflow hole toward the ground. be able to.
In other words, when the excavation claw excavates the ground or rock, if a predetermined fluid flows out from the outflow hole of the excavation claw and moves so as to remove ground dust such as rock powder, Since rock powder or the like is less likely to adhere, it is difficult to form the cutting edge on the excavation claw. Further, the formation of the constituent cutting edge can also be suppressed by cooling the excavation blade of the excavation claw and the ground surface cut by the excavation claw with the fluid flowing out from the outflow hole of the excavation claw.
Therefore, if the excavation claw has an outflow hole through which a predetermined fluid flows out toward the ground, the constituent cutting edge is hardly formed on the excavation claw, and good excavation can be performed.

請求項２に記載の発明は、例えば、図１〜図５に示すように、請求項１に記載の掘削爪を着脱可能に保持する掘削工具（１）であって、
前記掘削爪に設けられた前記流出孔から流出させる所定の流体を供給するための供給路（４１）が設けられていることを特徴とする。 Invention of Claim 2 is an excavation tool (1) which hold | maintains the excavation nail of Claim 1 so that attachment or detachment is possible, for example, as shown in FIGS.
A supply path (41) for supplying a predetermined fluid that flows out from the outflow hole provided in the excavation claw is provided.

請求項２に記載の発明によれば、掘削爪を保持する掘削工具には、その掘削爪の流出孔から流出させる所定の流体を掘削爪に供給するための供給路が設けられているので、その供給路を通じて掘削爪に所定の流体を供給することによって、掘削爪の流出孔からその流体を流出させることができる。   According to the invention of claim 2, since the excavation tool for holding the excavation claw is provided with a supply path for supplying the excavation claw with a predetermined fluid that flows out from the outflow hole of the excavation claw, By supplying a predetermined fluid to the excavation claw through the supply path, the fluid can be discharged from the outflow hole of the excavation claw.

本発明によれば、掘削爪が保持された掘削工具により地盤を掘削する際に、掘削爪に設けられた流出孔から所定の流体を流出させることによって、岩石粉などの地盤の削り粉を除去したり、掘削爪の掘削刃や、掘削爪によって削られる地盤面を冷却したりすることができるので、掘削爪に構成刃先が形成され難くすることができる。
従って、本発明に係る掘削爪を保持する掘削工具であれば、地盤を掘削する際に、掘削爪に構成刃先は形成され難いので、構成刃先に掘削を妨げられることなく、良好な掘削を行うことが可能になる。 According to the present invention, when excavating the ground with an excavation tool that holds excavation claws, ground fluid such as rock powder is removed by allowing a predetermined fluid to flow out from an outflow hole provided in the excavation claws. And the ground surface cut by the excavation claw can be cooled, so that the constituent cutting edge can be hardly formed on the excavation claw.
Therefore, in the case of the excavation tool that holds the excavation claw according to the present invention, when the ground is excavated, it is difficult to form the cutting edge on the excavation claw, so that the excavation is not hindered by the constituent cutting edge and good excavation is performed. It becomes possible.

以下、本発明に係る掘削爪及び掘削工具の実施形態について、図面を参照して詳細に説明する。
図１は掘削爪を備えた掘削工具の側面図、図２は掘削爪の斜視図、図３は掘削爪が掘削工具に装着された状態の要部を示す拡大図である。 Hereinafter, embodiments of the excavation claw and the excavation tool according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of an excavation tool having an excavation claw, FIG. 2 is a perspective view of the excavation claw, and FIG. 3 is an enlarged view showing a main part in a state where the excavation claw is attached to the excavation tool.

図１に示すように、掘削工具１は、図示しないオーガの先端部（下端部）に接続されてオーガの回転に伴い回転する接続部２と、接続部２の外周に対して左右対称に設けられた二枚のプロペラ状の羽根部４、４と、を備え、各羽根部４に複数（本実施形態においては、３つ）の掘削爪１０が着脱可能に装着されて構成されている。   As shown in FIG. 1, the excavation tool 1 is provided symmetrically with respect to a connection portion 2 that is connected to a distal end portion (lower end portion) of an auger (not shown) and rotates as the auger rotates, and an outer periphery of the connection portion 2. The two propeller-shaped blade portions 4 and 4 are provided, and a plurality of (three in the present embodiment) excavation claws 10 are detachably mounted on each blade portion 4.

接続部２は、オーガ（図示省略）の先端部に接続される際に接続軸となる軸部２１と、軸部２１の下部に固定された先端爪２２と、軸部２１と先端爪２２とを連結する連結部２３とを備えている。   The connecting portion 2 includes a shaft portion 21 that serves as a connecting shaft when connected to a tip portion of an auger (not shown), a tip claw 22 fixed to the lower portion of the shaft portion 21, a shaft portion 21 and a tip claw 22. And a connecting portion 23 for connecting the two.

軸部２１は、多角形状を呈する柱状の軸部であり、オーガの下端部に設けられた凹状の嵌合孔に挿入可能な形状に形成されている。なお、接続部２は、オーガの嵌合孔に軸部２１を挿入した状態で軸部２１の二つの溝部２１ａ、２１ａにピン等の連結部材を通すことにより、オーガの下端部に固定されるようになっている。
先端爪２２は、地盤を削る刃先を有している。
連結部２３は、正面視して下方に向かうにつれて細くなるテーパ状に形成されており、この連結部２３における接続部２の軸心を挟んで対向する位置に羽根部４、４が設けられている。 The shaft portion 21 is a columnar shaft portion having a polygonal shape, and is formed in a shape that can be inserted into a concave fitting hole provided in the lower end portion of the auger. The connecting portion 2 is fixed to the lower end portion of the auger by passing a connecting member such as a pin through the two groove portions 21a and 21a of the shaft portion 21 with the shaft portion 21 inserted into the fitting hole of the auger. It is like that.
The tip claw 22 has a cutting edge for cutting the ground.
The connecting portion 23 is formed in a tapered shape that becomes thinner as it goes downward when viewed from the front, and the blade portions 4 and 4 are provided at positions facing each other across the axis of the connecting portion 2 in the connecting portion 23. Yes.

羽根部４は、所定の厚みを有する略四角形状の部材であって、連結部２３から外側に延出するように左右対称に設けられている。
また、羽根部４は、図３に示すように、その内部に掘削爪１０の後述する接続軸１１が挿入される嵌合孔４ａを備えている。この嵌合孔４ａは、接続軸１１（すなわち、後述する密閉軸部１３、抜け止め軸部１５、回り止め部１４）よりも若干大きめの略同形状に形成された窪みであり、接続軸１１が嵌合するようになっている。
具体的には、嵌合孔４ａには後述する密閉軸部１３の一端側が配置される基端孔部４ｃと、嵌合孔４ａにおいて密閉軸部１３に対応する位置にシール材３を配設するための密閉溝部４ｄと、嵌合孔４ａの中央部分において抜け止め軸部１５のリテーナ１５ａが係合する抜け止め溝部４ｂと、が形成されている。
その密閉溝部４ｄには、Ｏリングなどのシール材３が配設されており、そのシール材３が後述する密閉軸部１３と密着するようになっている。
また、嵌合孔４ａにおける回り止め部１４に対応する位置は、後述する回り止め部１４の周面の形状に応じた開口形状（例えば、六角形状）を有している。 The blade part 4 is a substantially quadrilateral member having a predetermined thickness, and is provided symmetrically so as to extend outward from the connecting part 23.
Moreover, the blade | wing part 4 is provided with the fitting hole 4a in which the connection shaft 11 mentioned later of the excavation nail | claw 10 is inserted, as shown in FIG. The fitting hole 4 a is a recess formed in substantially the same shape that is slightly larger than the connecting shaft 11 (that is, a sealing shaft portion 13, a retaining shaft portion 15, and a rotation preventing portion 14 described later). Is designed to fit.
Specifically, the fitting hole 4a is provided with a base end hole part 4c in which one end side of the sealing shaft part 13 to be described later is disposed, and the sealing material 3 at a position corresponding to the sealing shaft part 13 in the fitting hole 4a. A sealing groove portion 4d is formed, and a retaining groove portion 4b with which the retainer 15a of the retaining shaft portion 15 engages is formed at the center portion of the fitting hole 4a.
A sealing material 3 such as an O-ring is disposed in the sealing groove portion 4d, and the sealing material 3 comes into close contact with a sealing shaft portion 13 to be described later.
Moreover, the position corresponding to the rotation prevention part 14 in the fitting hole 4a has the opening shape (for example, hexagonal shape) according to the shape of the surrounding surface of the rotation prevention part 14 mentioned later.

そして、羽根部４の下面側に設けられた嵌合孔４ａに掘削爪１０が装着されて、羽根部４の長さ方向（延出方向）に沿って３つの掘削爪１０が羽根部４に着脱可能に保持されている。   And the excavation nail | claw 10 is mounted | worn with the fitting hole 4a provided in the lower surface side of the blade | wing part 4, and the three excavation claws 10 are attached to the blade | wing part 4 along the length direction (extension direction) of the blade | wing part 4. Removably held.

図２に示すように、掘削爪１０は、羽根部４の嵌合孔４ａに挿入される接続軸１１と、接続軸１１の先端に設けられて地盤に対して接触する掘削部１２と、を備えている。
そして、掘削爪１０は、掘削工具１の羽根部４に対して着脱自在に備えられて地盤や岩盤を掘削するものである。 As shown in FIG. 2, the excavation claw 10 includes a connection shaft 11 inserted into the fitting hole 4 a of the blade portion 4, and an excavation unit 12 provided at the tip of the connection shaft 11 and in contact with the ground. I have.
And the excavation nail | claw 10 is detachably provided with respect to the blade | wing part 4 of the excavation tool 1, and excavates a ground and a rock.

接続軸１１は、羽根部４の嵌合孔４ａに嵌合した状態で、嵌合孔４ａに対する接続軸１１の回転を規制するとともに掘削部１２を支持する回り止め部１４と、回り止め部１４の後方に位置して嵌合孔４ａに挿入された接続軸１１が羽根部４から抜けるのを防止する抜け止め軸部１５と、抜け止め軸部１５の後方に位置して嵌合孔４ａと密着するように隙間を塞ぐ密閉軸部１３と、を備えている。   The connection shaft 11 is fitted in the fitting hole 4 a of the blade portion 4, and restricts the rotation of the connection shaft 11 with respect to the fitting hole 4 a and supports the excavation part 12, and the rotation prevention part 14. A retaining shaft 15 that prevents the connecting shaft 11 inserted in the fitting hole 4a from being removed from the blade portion 4 and a fitting hole 4a that is located behind the retaining shaft 15. And a sealed shaft portion 13 that closes the gap so as to be in close contact with each other.

回り止め部１４は、その周面が断面視六角形状を呈する軸部であり、嵌合孔４ａにおける開口部において軸支されて、掘削爪１０が接続軸１１を軸心として回転することを防止するようになっている。   The anti-rotation portion 14 is a shaft portion whose peripheral surface has a hexagonal shape in cross section, and is pivotally supported at the opening portion in the fitting hole 4a to prevent the excavation claw 10 from rotating about the connection shaft 11 as an axis. It is supposed to be.

密閉軸部１３は、嵌合孔４ａにおける密閉溝部４ｄに配設されたシール材３と密着するようになっている。具体的には、密閉軸部１３の大径部１３ａがシール材３や嵌合孔４ａの内面と密着し、接続軸１１と嵌合孔４ａの間の隙間を塞いでいる。すなわち、掘削工具１の羽根部４に装着された掘削爪１０の接続軸１１と、その羽根部４の嵌合孔４ａとの間には隙間がなく、羽根部４側から供給される後述する流体が密閉軸部１３と嵌合孔４ａの間から漏れないようになっている。   The sealing shaft portion 13 is in close contact with the sealing material 3 disposed in the sealing groove portion 4d in the fitting hole 4a. Specifically, the large-diameter portion 13a of the sealed shaft portion 13 is in close contact with the sealing material 3 and the inner surface of the fitting hole 4a, and closes the gap between the connecting shaft 11 and the fitting hole 4a. That is, there is no gap between the connecting shaft 11 of the excavation claw 10 attached to the blade part 4 of the excavation tool 1 and the fitting hole 4a of the blade part 4, and the description will be given later supplied from the blade part 4 side. The fluid is prevented from leaking between the sealed shaft portion 13 and the fitting hole 4a.

掘削部１２は、側断面視略コ字形状を呈する凹部を有するチップ保持部１２１と、チップ保持部１２１の凹部内に埋め込まれる掘削チップ１２２とから構成されている。なお、掘削チップ１２２はチップ保持部１２１に強固に固定されている。   The excavation part 12 includes a chip holding part 121 having a concave portion that is substantially U-shaped in a side sectional view, and a excavation tip 122 embedded in the concave part of the chip holding part 121. The excavation tip 122 is firmly fixed to the tip holding part 121.

掘削チップ１２２は、掘削刃１２２ａを有しており、また、チップ保持部１２１は、掘削刃１２１ａを有している。
この掘削チップ１２２の掘削刃１２２ａと、チップ保持部１２１の掘削刃１２１ａは、その刃筋（エッヂ）が揃っており、掘削刃１２２ａと掘削刃１２１ａとで一体的な刃先を形成し、地盤を削るようになっている。 The excavation tip 122 has an excavation blade 122a, and the tip holding part 121 has an excavation blade 121a.
The excavation blade 122a of the excavation tip 122 and the excavation blade 121a of the tip holding part 121 have the same blade line (edge), and the excavation blade 122a and the excavation blade 121a form an integral cutting edge, and the ground It is designed to cut.

また、図３（ａ）、（ｂ）に示すように、掘削爪１０の掘削部１２であって、掘削チップ１２２の掘削刃１２２ａ部分には、所定の流体を流出するための流出孔５が形成されている。なお、流出孔５は、掘削チップ１２２における地盤側に向く掘削刃１２２ａに設けられている。
この流出孔５は、掘削チップ１２２とチップ保持部１２１とを貫通するように連なって形成されている流路５１の一方の開口部であり、流路５１の他方の開口部５１ａは、密閉軸部１３の一端に形成されている。
そして、接続軸１１の密閉軸部１３の一端が位置する嵌合孔４ａの基端孔部４ｃに、掘削工具１に形成されている供給路４１が繋がっている。
この供給路４１は、図１に示すように、掘削工具１の軸部２１、連結部２３、羽根部４に亘って連なっており、オーガ（図示省略）側から送給される所定の流体を掘削爪１０に供給するための流路として形成されている。すなわち、供給路４１は、掘削爪１０に設けられた流路孔５から流出させる所定の流体を供給するための流路として設けられている。
また、先端爪２２にも供給路４１は繋がっており、所定の流体を流出させるための流出孔６が形成されている。 Further, as shown in FIGS. 3A and 3B, the excavation part 12 of the excavation claw 10 and the excavation blade 122a portion of the excavation tip 122 have an outflow hole 5 through which a predetermined fluid flows out. Is formed. The outflow hole 5 is provided in the excavation blade 122a facing the ground side in the excavation tip 122.
The outflow hole 5 is one opening portion of the flow channel 51 formed so as to penetrate the excavation tip 122 and the tip holding portion 121, and the other opening portion 51a of the flow channel 51 has a sealed shaft. It is formed at one end of the portion 13.
And the supply path 41 currently formed in the excavation tool 1 is connected to the base end hole part 4c of the fitting hole 4a in which the end of the sealing shaft part 13 of the connection shaft 11 is located.
As shown in FIG. 1, the supply path 41 is continuous over the shaft portion 21, the connecting portion 23, and the blade portion 4 of the excavating tool 1, and receives a predetermined fluid fed from the auger (not shown) side. It is formed as a flow path for supplying to the excavation claw 10. That is, the supply path 41 is provided as a flow path for supplying a predetermined fluid that flows out from the flow path hole 5 provided in the excavation claw 10.
The supply passage 41 is also connected to the tip claw 22, and an outflow hole 6 for allowing a predetermined fluid to flow out is formed.

このような掘削爪１０が装着された掘削工具１を図示しないオーガの先端部であるオーガヘッド（図示省略）に取り付けて、そのオーガヘッドの回転駆動に伴い掘削工具１を回転させて、掘削爪１０（掘削工具１）によって地盤を削って掘削する際に、オーガ側から所定の流体を掘削工具１に送給する。
そして、オーガ側から送給された所定の流体を掘削工具１に設けられている供給路４１を通じて、掘削爪１０の流路５１に供給し、掘削爪１０に設けられた流出孔５から所定の流体を地盤に向けて流出させることができる。その流体を掘削爪１０の流出孔５から噴出させて、岩石粉などの地盤の削り粉を吹き飛ばして除去してしまえば、掘削爪１０に岩石粉などは付着し難くなるので、掘削爪１０に構成刃先が形成され難くなる。
また、掘削爪１０の流出孔５から噴出された所定の流体によって、掘削爪１０の掘削刃（１２２ｂ、１２１ａ）や、掘削爪１０によって削られる地盤面を冷却することによっても、構成刃先の形成を抑制することができる。
なお、所定の流体としては、空気などの気体や水などの液体を使用することができる。 The excavation tool 1 to which the excavation claw 10 is attached is attached to an auger head (not shown) which is a tip portion of an auger (not shown), and the excavation tool 1 is rotated in accordance with the rotational drive of the auger head. When excavating the ground with 10 (excavation tool 1), a predetermined fluid is supplied to the excavation tool 1 from the auger side.
Then, a predetermined fluid fed from the auger side is supplied to the flow path 51 of the excavation claw 10 through the supply path 41 provided in the excavation tool 1, and the predetermined fluid is supplied from the outflow hole 5 provided in the excavation claw 10. The fluid can be discharged toward the ground. If the fluid is ejected from the outflow hole 5 of the excavation claw 10 and the ground shaving powder such as rock powder is blown away, the rock powder or the like is less likely to adhere to the excavation claw 10. It becomes difficult to form the component cutting edge.
The formation of the constituent cutting edge is also achieved by cooling the excavation blades (122b, 121a) of the excavation claw 10 or the ground surface cut by the excavation claw 10 with a predetermined fluid ejected from the outflow hole 5 of the excavation claw 10. Can be suppressed.
As the predetermined fluid, a gas such as air or a liquid such as water can be used.

また、掘削工具１における先端爪２２の流出孔６からも、その流体を噴出させることができるので、掘削工具１の先端爪２２にも構成刃先は形成され難くなっている。   Moreover, since the fluid can be ejected also from the outflow hole 6 of the tip claw 22 in the excavation tool 1, it is difficult to form a constituent edge on the tip claw 22 of the excavation tool 1.

このように、本発明に係る掘削爪１０を保持する掘削工具１であれば、地盤を掘削する際に、掘削爪１０の掘削刃（１２２ｂ、１２１ａ）に構成刃先は形成され難いので、構成刃先に掘削を妨げられることなく、良好な掘削を行うことができる。   Thus, in the case of the excavating tool 1 that holds the excavating claw 10 according to the present invention, the constituent cutting edge is difficult to be formed on the excavating blades (122b, 121a) of the excavating claw 10 when excavating the ground. Therefore, good excavation can be performed without being interrupted.

なお、本発明は上記実施形態に限られるものではない。   The present invention is not limited to the above embodiment.

例えば、図４（ａ）、（ｂ）に示すように、掘削爪１０ａの掘削部１２であって、チップ保持部１２１の掘削刃１２１ａ部分に、所定の流体を流出するための流出孔７を形成してもよい。この流出孔７は、チップ保持部１２１を貫通するように形成されている流路７１の一方の開口部であり、その流路７１の他方の開口部７１ａは、密閉軸部１３の一端に形成されている。なお、流出孔７は、チップ保持部１２１における地盤側に向く掘削刃１２１ａに設けられている。
このような掘削爪１０ａを保持する掘削工具１であっても、掘削爪１０ａの掘削刃（１２２ｂ、１２１ａ）に構成刃先は形成され難いので、良好な掘削を行うことができる。 For example, as shown in FIGS. 4A and 4B, the excavation part 12 of the excavation claw 10 a and the outflow hole 7 for allowing a predetermined fluid to flow out is provided in the excavation blade 121 a part of the tip holding part 121. It may be formed. The outflow hole 7 is one opening portion of the flow channel 71 formed so as to penetrate the chip holding portion 121, and the other opening portion 71 a of the flow channel 71 is formed at one end of the sealed shaft portion 13. Has been. The outflow hole 7 is provided in the excavation blade 121a facing the ground side in the tip holding part 121.
Even with the excavating tool 1 that holds the excavating claw 10a, it is difficult to form the cutting edge on the excavating blades (122b, 121a) of the excavating claw 10a, so that an excellent excavation can be performed.

また、図５（ａ）、（ｂ）に示すように、掘削爪１０ｂの掘削部１２であって、掘削チップ１２２の掘削刃１２２ａ部分に所定の流体を流出するための流出孔５を形成し、チップ保持部１２１の掘削刃１２１ａ部分に所定の流体を流出するための流出孔７を形成してもよい。
流出孔５は、掘削チップ１２２とチップ保持部１２１とを貫通するように連なって形成されている流路８１の第１開口部であり、流出孔７は、チップ保持部１２１を貫通するように形成されている流路８１の第２開口部であって、その流路８１の他方の開口部８１ａは、密閉軸部１３の一端に形成されている。なお、流出孔５は、掘削チップ１２２における地盤側に向く掘削刃１２２ａに設けられ、流出孔７は、チップ保持部１２１における地盤側に向く掘削刃１２１ａに設けられている。
このような掘削爪１０ｂを保持する掘削工具１であっても、掘削爪１０ｂの掘削刃（１２２ｂ、１２１ａ）に構成刃先は形成され難いので、良好な掘削を行うことができる。 Further, as shown in FIGS. 5A and 5B, an outflow hole 5 is formed in the excavation part 12 of the excavation claw 10 b and outflows a predetermined fluid in the excavation blade 122 a portion of the excavation tip 122. The outflow hole 7 for allowing a predetermined fluid to flow out may be formed in the excavation blade 121a portion of the tip holding unit 121.
The outflow hole 5 is a first opening of the flow channel 81 formed so as to penetrate the excavation tip 122 and the tip holding portion 121, and the outflow hole 7 passes through the tip holding portion 121. The other opening 81 a of the channel 81 that is formed and the other opening 81 a of the channel 81 is formed at one end of the sealed shaft portion 13. The outflow hole 5 is provided in the excavation blade 122 a facing the ground side in the excavation tip 122, and the outflow hole 7 is provided in the excavation blade 121 a facing the ground side in the tip holding part 121.
Even in the excavation tool 1 that holds the excavation claw 10b, it is difficult to form the cutting edge on the excavation blades (122b, 121a) of the excavation claw 10b, so that good excavation can be performed.

なお、本発明の適用は上述した実施形態に限定されることなく、本発明の趣旨を逸脱しない範囲で適宜変更可能である。   The application of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.

本発明に係る掘削爪を備えた掘削工具を示す側面図である。It is a side view which shows the excavation tool provided with the excavation nail | claw which concerns on this invention. 本発明に係る掘削爪を示す斜視図である。It is a perspective view which shows the excavation nail | claw which concerns on this invention. 掘削爪が羽根部に装着された状態の要部を示す一部断面拡大図（ａ）と、羽根部に装着された掘削爪を示す下面図（ｂ）である。It is the partial cross-section enlarged view (a) which shows the principal part in the state where the excavation claw was attached to the blade part, and the bottom view (b) which shows the excavation claw attached to the blade part. 本発明の変形例であって、掘削爪が羽根部に装着された状態の要部を示す一部断面拡大図（ａ）と、羽根部に装着された掘削爪を示す下面図（ｂ）である。It is a modification of this invention, Comprising: The partial cross-section enlarged view (a) which shows the principal part in the state where the excavation nail was attached to the blade part, and the bottom view (b) which shows the excavation nail attached to the blade part is there. 本発明の変形例であって、掘削爪が羽根部に装着された状態の要部を示す一部断面拡大図（ａ）と、羽根部に装着された掘削爪を示す下面図（ｂ）である。It is a modification of this invention, Comprising: The partial cross-section enlarged view (a) which shows the principal part in the state where the excavation nail was attached to the blade part, and the bottom view (b) which shows the excavation nail attached to the blade part is there. 従来の掘削爪に構成刃先が形成された状態を示す一部断面拡大図（ａ）と、その掘削爪を示す下面図（ｂ）である。It is the partial cross-section enlarged view (a) which shows the state in which the constituent cutting edge was formed in the conventional excavation claw, and the bottom view (b) which shows the excavation claw.

符号の説明Explanation of symbols

１ 掘削工具
２ 接続部
３ シール材
４ 羽根部
４ａ 嵌合孔
４ｄ 密閉溝部
４１ 供給路
５、６、７ 流出孔
５１、７１、８１ 流路
１０ 掘削爪
１１ 接続軸
１２ 掘削部
１２１ チップ保持部
１２１ａ 掘削刃
１２２ 掘削チップ
１２２ａ 掘削刃
１３ 密閉軸部
１４ 回り止め部
１５ 抜け止め軸部 DESCRIPTION OF SYMBOLS 1 Excavation tool 2 Connection part 3 Sealing material 4 Blade | blade part 4a Fitting hole 4d Sealing groove part 41 Supply path 5, 6, 7 Outflow hole 51, 71, 81 Channel 10 Excavation claw 11 Connection shaft 12 Excavation part 121 Tip holding part 121a Excavation blade 122 Excavation tip 122a Excavation blade 13 Sealed shaft portion 14 Non-rotating portion 15 Retaining shaft portion

Claims (2)

掘削刃を有する掘削チップと、
前記掘削チップを保持するチップ保持部と、を備え、地盤を掘削する掘削爪であって、
前記掘削チップと前記チップ保持部の少なくとも一方に、前記地盤に向けて所定の流体を流出するための流出孔が設けられていることを特徴とする掘削爪。 A drilling tip having a drilling blade;
A tip holding part for holding the drilling tip, and a drilling claw for drilling the ground,
An excavation claw characterized in that an outflow hole for allowing a predetermined fluid to flow out toward the ground is provided in at least one of the excavation tip and the tip holding part. 請求項１に記載の掘削爪を着脱可能に保持する掘削工具であって、
前記掘削爪に設けられた前記流出孔から流出させる所定の流体を供給するための供給路が設けられていることを特徴とする掘削工具。 An excavation tool for detachably holding the excavation claw according to claim 1,
An excavation tool, characterized in that a supply path for supplying a predetermined fluid that flows out from the outflow hole provided in the excavation claw is provided.
JP2005351992A 2005-12-06 2005-12-06 Excavation tip and excavation tool Pending JP2007154526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005351992A JP2007154526A (en) 2005-12-06 2005-12-06 Excavation tip and excavation tool

Publications (1)

Publication Number Publication Date
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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104763347A (en) * 2015-01-23 2015-07-08 中国石油天然气集团公司 Sweat cooling PDC drill bit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07324580A (en) * 1994-05-30 1995-12-12 Toshiba Tungaloy Co Ltd Rock bit
JPH09119280A (en) * 1995-10-24 1997-05-06 Susumu Nasu Excavator and pipe press-in structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07324580A (en) * 1994-05-30 1995-12-12 Toshiba Tungaloy Co Ltd Rock bit
JPH09119280A (en) * 1995-10-24 1997-05-06 Susumu Nasu Excavator and pipe press-in structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104763347A (en) * 2015-01-23 2015-07-08 中国石油天然气集团公司 Sweat cooling PDC drill bit

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