JP4990597B2 - Drilling tool - Google Patents

Drilling tool Download PDF

Info

Publication number
JP4990597B2
JP4990597B2 JP2006300125A JP2006300125A JP4990597B2 JP 4990597 B2 JP4990597 B2 JP 4990597B2 JP 2006300125 A JP2006300125 A JP 2006300125A JP 2006300125 A JP2006300125 A JP 2006300125A JP 4990597 B2 JP4990597 B2 JP 4990597B2
Authority
JP
Japan
Prior art keywords
drilling
rod
drilling tool
core member
hole
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.)
Expired - Fee Related
Application number
JP2006300125A
Other languages
Japanese (ja)
Other versions
JP2008115611A (en
Inventor
良信 下井谷
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.)
ALLOY KOGYO CO.,LTD.
Original Assignee
ALLOY KOGYO 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 ALLOY KOGYO CO.,LTD. filed Critical ALLOY KOGYO CO.,LTD.
Priority to JP2006300125A priority Critical patent/JP4990597B2/en
Publication of JP2008115611A publication Critical patent/JP2008115611A/en
Application granted granted Critical
Publication of JP4990597B2 publication Critical patent/JP4990597B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Earth Drilling (AREA)

Description

この発明は、トンネル工事や基礎工事、補強工事などにおいて用いられる削孔工具に関し、より詳しくは、硬い岩盤に対しても削孔が行えるような強度の高い削孔工具に関する。   The present invention relates to a drilling tool used in tunnel construction, foundation work, reinforcement work, and the like, and more particularly, to a drilling tool having high strength that can drill a hard rock.

削孔工具により削孔した後は、削孔工具の先端に取り付けられたビットなどを孔内に残して、削孔のための動力を伝達するロッドなどの必要な部材のみを回収する方法が採られる。   After drilling with a drilling tool, leave a bit attached to the tip of the drilling tool in the hole and collect only the necessary members such as a rod that transmits power for drilling. It is done.

このため、削孔工具には、削孔後に分離可能な接続部分が必要であり、様々な構造が提案されている(たとえば下記特許文献1参照)。   For this reason, the drilling tool requires a connecting portion that can be separated after drilling, and various structures have been proposed (for example, see Patent Document 1 below).

しかし、上記分離可能な接続部分は、棒状の形態をなすロッドと、該ロッドを挿入する部分とよりなり、その重合部分に螺合のためのねじや、係脱のための溝および突起等を有する構成であるので、接続部分を構成する部材に厚みの薄い部分ができる。にもかかわらず、削孔工具の軸心部分に貫通孔を有する場合や、削孔工具の小型化を図る場合には、接続部分をコンパクトにし、その厚みを薄くせざるを得ない。しかし、接続部分に厚みの薄い部分があると接続部分の強度が低下するので、削孔作業時に接続部分が損傷してしまうおそれがある。このため、硬い岩盤に対する削孔ができないという問題点を有する。   However, the separable connecting portion is composed of a rod having a rod-like shape and a portion into which the rod is inserted, and a screw for screwing, a groove and a protrusion for engaging / disengaging, etc. are attached to the overlapped portion. Since it is the structure which has, a thin part is made in the member which comprises a connection part. Nevertheless, when the through hole is provided in the axial center portion of the drilling tool or when the drilling tool is downsized, the connecting portion must be made compact and the thickness thereof must be reduced. However, if there is a thin portion in the connection portion, the strength of the connection portion is reduced, so that the connection portion may be damaged during the drilling operation. For this reason, there is a problem that drilling cannot be performed on hard rock.

特開2003−172089号公報JP 2003-172089 A

そこでこの発明は、小型化しても充分な強度が得られるような削孔工具の提供を主たる課題とする。   Accordingly, the main object of the present invention is to provide a drilling tool that can obtain sufficient strength even if it is downsized.

そのための手段は、削孔のための動力を伝達するロッドと、該ロッドの先に設けられて削孔を行う削孔ビット部材とを有し、上記ロッドの先端部と削孔ビット部材の後端部との間には、ロッドを削孔ビット部材に対して着脱可能に接続する着脱構造が設けられた削孔工具であって、上記着脱構造が、長さ方向において相互に係合する2個の筒状部を有するとともに、これら筒状部の内側に、筒状部間にまたがるように芯部材を挿入して構成され、該芯部材が、いずれか一方の筒状部に圧入された削孔工具である。 Means therefor include a rod for transmitting power for drilling, and a drill bit member provided at the tip of the rod for drilling, and after the rod tip and the drill bit member. A drilling tool provided with an attaching / detaching structure for detachably connecting the rod to the drilling bit member between the ends, wherein the attaching / detaching structure engages with each other in the length direction 2. It has a cylindrical portion, and a core member is inserted inside the cylindrical portions so as to straddle the cylindrical portions, and the core member is press-fitted into one of the cylindrical portions. Drilling tool.

この構成によれば、ロッドと削孔ビット部材との間の着脱構造は、長さ方向において相互に係合する筒状部と、これら筒状部の内側に挿入された芯部材とを有し、芯部材が2個の筒状部間にまたがるように介在して2個の筒状部の接続状態を保持する。そして芯となって、内外で重合する部分において、その接続状態を補強する。   According to this configuration, the attachment / detachment structure between the rod and the drill bit member has a cylindrical portion that is engaged with each other in the length direction, and a core member that is inserted inside the cylindrical portion. The core member is interposed so as to straddle between the two cylindrical parts, and the connection state of the two cylindrical parts is maintained. And in the part which becomes a core and superposes inside and outside, the connection state is reinforced.

このため、2個の部材が内外に重なり合うように嵌合してこれらの間にねじ等の係脱のための係脱構造を有する場合に比して、部材の厚みを確保し、形態を簡素にすることができる。この結果、強度を得ることができる。しかも、上記芯部材が、いずれか一方の筒状部に圧入されるものであるので、筒状部との一体性が増し、強度の向上が望める。 For this reason, the thickness of the member is ensured and the configuration is simplified compared to the case where the two members are fitted so as to overlap inside and outside and have an engagement / disengagement structure for engagement / disengagement of screws or the like between them. Can be. As a result, strength can be obtained. In addition, since the core member is press-fitted into any one of the cylindrical portions, the integrity with the cylindrical portion is increased, and an improvement in strength can be expected.

ここで、上記構成要素については、次のような態様を採用することができる Here, the following aspects can be adopted for the above components .

記圧入は削孔ビット部材側の筒状部に対して行うとよい。削孔後に削孔ビット部材を孔内に置いてくるときに、芯部材も一緒に置いてくることができる。このようにすると、削孔の度に新しい芯部材を使用するようにすることができる。 Upper Symbol press fitting may be performed with respect to the tubular portion of the drilling bit member. When the drill bit member is placed in the hole after drilling, the core member can also be placed together. If it does in this way, a new core member can be used for every drilling.

態様の他の一つは、上記芯部材と、上記2個の筒状部の長さ方向における相対向する対向面部との間に、ぬすみ部が形成されたものである。
この構成によれば、削孔動作に伴って2個の筒状部の対向面が互いに激しく当たって対向面部が膨れ上がっても、ぬすみ部があるので、力を逃がすことができ、耐久性を高めることができる。
In another aspect, a thin portion is formed between the core member and opposing surface portions facing each other in the length direction of the two cylindrical portions.
According to this configuration, even if the opposing surfaces of the two cylindrical portions hit each other violently with the drilling operation and the opposing surface portions swell up, there is a dull portion, so that the force can be released and durability can be improved. Can be increased.

態様の他の一つは、上記芯部材の長さが、筒状部同士の係合部分の長さよりも長く設定されたものである。
この構成によれば、芯部材は係合部分の長さよりも長く形成されている結果、芯部材が筒状部同士の間により深く挿入されることになり、剛性をより高めることができる。
In another aspect, the length of the core member is set longer than the length of the engaging portion between the cylindrical portions.
According to this configuration, as a result of the core member being formed longer than the length of the engaging portion, the core member is inserted deeper between the cylindrical portions, and the rigidity can be further increased.

態様の他の一つは、上記芯部材の軸心部分に、長さ方向に貫通する貫通孔部が形成されたものである。
上記貫通孔部は、削孔に際して圧縮エアなどの流体を通すのに利用できるとともに、地盤改良剤等の薬液の注入にも利用できる。つまり、削孔のみではなく、薬液注入にも使用できる削孔工具とすることができる。
In another aspect, a through-hole portion penetrating in the length direction is formed in the axial center portion of the core member.
The through-hole portion can be used for passing a fluid such as compressed air when drilling, and can also be used for injecting a chemical solution such as a ground improvement agent. That is, it is possible to provide a drilling tool that can be used not only for drilling holes but also for injecting chemicals.

態様の他の一つは、上記各筒状部の相互間には、ロッドを一方向に回転したときに係合し、他方向に回転したときに上記係合が外れる鉤型の係脱爪部が形成された削孔工具である。
この構成によれば、ロッドを一方向に回転しながら打撃を加えれば相互に係合する係脱爪部を介してロッドの動力が削孔ビット部材に伝達され、削孔を行うことができる。そして、削孔工程の終了後は、ロッドを他方向に回転して引き抜けば、係脱爪部同士の係合が外れて、ロッドを回収することができる。
Another aspect of the present invention is a hook-type engaging / disengaging claw that engages when the rod is rotated in one direction and is disengaged when the rod is rotated in the other direction. This is a drilling tool in which a portion is formed.
According to this configuration, if the impact is applied while rotating the rod in one direction, the power of the rod is transmitted to the drilling bit member via the engaging and disengaging claw portions that engage with each other, so that drilling can be performed. And after completion | finish of a hole-drilling process, if a rod is rotated in another direction and it pulls out, engagement of an engagement / disengagement nail | claw part will disengage and a rod can be collect | recovered.

このため、回収作業が簡単であるとともに、着脱構造の筒状部同士の構造が簡素であるため、削孔時の衝撃で不測に破損したりするおそれを無くし、堅固な着脱構造を構成でき、確実な削孔と必要部材の回収を実現できる。   For this reason, since the collection work is simple and the structure of the cylindrical parts of the detachable structure is simple, there is no risk of accidental damage due to impact during drilling, and a solid detachable structure can be configured. Reliable drilling and recovery of necessary members can be realized.

以上のように、この発明は、ロッドと削孔ビット部材との着脱構造に、これらとは別の部材からなる芯部材を挿入して接続状態を保持し補強する構成であるので、着脱構造を構成する部材の厚みを部分的に薄くしたり、複雑な形状の溝を形成したりする場合に比して、充分な強度を得ることができる。このため、削孔工具の径を小さくした小型化を図ることもできる。   As described above, since the present invention is configured to hold and reinforce the connection state by inserting a core member made of a member different from these into the attachment / detachment structure of the rod and the drill bit member, Sufficient strength can be obtained as compared with the case where the thickness of the constituent members is partially reduced or a groove having a complicated shape is formed. For this reason, it is possible to reduce the size of the drilling tool by reducing the diameter.

この発明を実施するための一形態を、以下図面を用いて説明する。
図1は、削孔工具11の断面図、図2はその分解図である。これらの図に示すように削孔工具11は、削孔のための動力を伝達するロッド21と、該ロッド21の先端に着脱可能に取り付けられて削孔を行う削孔ビット部材31と、該削孔ビット部材31の後端部外周に取り付けられる先端スリーブ41と、該先端スリーブ41の後端に接続され、上記ロッド21の外周側に位置して削孔された孔壁の崩落を防ぐケーシングパイプ51とを有する。
An embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view of the drilling tool 11, and FIG. 2 is an exploded view thereof. As shown in these drawings, the drilling tool 11 includes a rod 21 that transmits power for drilling, a drill bit member 31 that is detachably attached to the tip of the rod 21, and performs drilling. A tip sleeve 41 attached to the outer periphery of the rear end portion of the drill bit member 31, and a casing connected to the rear end of the tip sleeve 41 to prevent collapse of the hole wall drilled at the outer peripheral side of the rod 21 And a pipe 51.

この削孔工具11では、ロッド21を介して削孔ビット部材31に伝達された回転力と打撃力とによって削孔が行われる構造であって、上記先端スリーブ41とケーシングパイプ51はその削孔動作に追従して削孔内に侵入する。しかし、先端スリーブ41とケーシングパイプ51は、削孔ビット部材31と同様に回転しないように構成されている。   The drilling tool 11 has a structure in which drilling is performed by the rotational force and striking force transmitted to the drilling bit member 31 through the rod 21, and the tip sleeve 41 and the casing pipe 51 are drilled. Follow the movement and enter the drilling hole. However, the tip sleeve 41 and the casing pipe 51 are configured not to rotate in the same manner as the drill bit member 31.

上記各部について順に説明する。
上記ロッド21は、パーカッションマシンの本体のハンマ機構部におけるシャンクロッド(図示せず)の先に接続されるもので、上記削孔ビット部材31に対して接続される先端ロッド21aと、この先端ロッド21aの後ろに順次継ぎ足される継ぎ足しロッドとがある。いずれも所定長さに形成された円筒状で、軸心部分には長さ方向に貫通する導通孔部22を有し、端部には接続のための雄ねじ23が形成されている。この雄ねじ23は左ねじである。つまり、左への回転が締まる方向への回転である。なお、図では、例としてテーパねじを示したが、ロープねじやハイリードねじなどであるもよい。そして、先端ロッド21aと継ぎ足しロッド、継ぎ足しロッド同士は、上記雄ねじ23に螺合する雌ねじ24aを両端部に有した円筒状のカップリング部材24によって接続される。
Each part will be described in turn.
The rod 21 is connected to the tip of a shank rod (not shown) in the hammer mechanism of the main body of the percussion machine. The tip rod 21a is connected to the drill bit member 31, and the tip rod. There is an extension rod sequentially added behind 21a. Each of them has a cylindrical shape formed with a predetermined length, and has a conduction hole portion 22 penetrating in the length direction at the axial center portion, and a male screw 23 for connection is formed at the end portion. The male screw 23 is a left-hand screw. That is, the rotation in the direction in which the rotation to the left is tightened. In the drawing, a taper screw is shown as an example, but a rope screw or a high lead screw may be used. The tip rod 21a and the extension rod and the extension rods are connected to each other by a cylindrical coupling member 24 having female screws 24a that are engaged with the male screw 23 at both ends.

先端ロッド21aの場合、上記接続のための雄ねじ23は後端に形成され、先端には、削孔ビット部材31に対する接続のための係合筒状部25が形成される。係合筒状部25の内周側には、上記導通孔部22よりも大径の孔部26を有し、外周部に、図3に示したような係脱爪部27を備えている。   In the case of the distal end rod 21a, the male screw 23 for the connection is formed at the rear end, and an engagement cylindrical portion 25 for connection to the drill bit member 31 is formed at the distal end. On the inner peripheral side of the engagement cylindrical portion 25, there is a hole portion 26 having a diameter larger than that of the conduction hole portion 22, and an engagement / disengagement claw portion 27 as shown in FIG. .

係脱爪部27は、図4に示した如く、先端ロッド21aを左方向に回転した時に削孔ビット部材31と係合し、反対側の右方向に回転した時にその係合が外れるもので、鉤型に形成されている。つまり、長さ方向に延びる延設部27aと、該延設部27aの先端部から左方向に突出する爪部27bとを有する平面視横L字型である。   As shown in FIG. 4, the engagement / disengagement claw portion 27 is engaged with the drill bit member 31 when the distal end rod 21a is rotated leftward, and is disengaged when it is rotated rightward on the opposite side. It is formed in a bowl shape. That is, it is a horizontal L-shape in a plan view having an extending portion 27a extending in the length direction and a claw portion 27b protruding leftward from the distal end portion of the extending portion 27a.

このような形状の係脱爪部27は、等間隔を隔てて2個形成される。好ましくは、これら係脱爪部27は、その幅方向の大きさが係合筒状部25を周方向に4等分した程度の大きさであるとよい。
なお、図4は、先端スリーブ41を除く、図1のA−A線矢視断面図である。
Two engagement / disengagement claw portions 27 having such a shape are formed at equal intervals. Preferably, the engagement / disengagement claw portions 27 have a size in the width direction that is approximately equal to the engagement cylindrical portion 25 divided into four in the circumferential direction.
FIG. 4 is a cross-sectional view taken along line AA in FIG.

上記削孔ビット部材31は、上記ロッド21が接続される略円筒状の本体部材61と、該本体部材61の先に一体固定されるビット部材71とからなる。本体部材61は、後端部に上記先端ロッド21aの係合筒状部25が着脱可能に接続する被係合筒状部62を有し、先端部がビット部材71内に差し込まれて回転不可能な状態に固定される。   The drill bit member 31 includes a substantially cylindrical main body member 61 to which the rod 21 is connected, and a bit member 71 that is integrally fixed to the end of the main body member 61. The main body member 61 has an engaged cylindrical portion 62 to which the engaging cylindrical portion 25 of the distal end rod 21a is detachably connected at the rear end portion, and the distal end portion is inserted into the bit member 71 to prevent rotation. Fixed in a possible state.

上記被係合筒状部62は、先端ロッド21aの係合筒状部25と、その長さ方向において相互に係合するもので、係合筒状部25と同径の筒状に形成され、内周側には、係合筒状部25の孔部26と同径の孔部63を有し、外周部に、図3に示したような係脱爪部64を有している。   The engaged cylindrical portion 62 engages with the engaging cylindrical portion 25 of the distal end rod 21a in the length direction thereof, and is formed in a cylindrical shape having the same diameter as the engaging cylindrical portion 25. The inner peripheral side has a hole 63 having the same diameter as the hole 26 of the engaging cylindrical part 25, and the outer peripheral part has an engagement / disengagement claw part 64 as shown in FIG.

係脱爪部64は、図4に示した如く、先端ロッド21aを左方向に回転した時にその係脱爪部27と係合し、反対側の右方向に回転した時にその係合が外れるもので、鉤型に形成されている。つまり、長さ方向に延びる延設部64aと、該延設部64aの先端部から右方向に突出する爪部64bとを有する平面視横L字型である。このような形状の係脱爪部64は、等間隔を隔てて2個形成される。   As shown in FIG. 4, the engagement / disengagement claw portion 64 is engaged with the engagement / disengagement claw portion 27 when the distal end rod 21a is rotated in the left direction, and disengaged when it is rotated in the right direction on the opposite side. And it is formed in a bowl shape. That is, it is a horizontal L-shape in a plan view having an extending portion 64a extending in the length direction and a claw portion 64b protruding rightward from the distal end portion of the extending portion 64a. Two engagement / disengagement claw portions 64 having such a shape are formed at equal intervals.

そして、上記孔部63の先端側には、内外に貫通する保持孔65が、その周方向に3個または4個と適宜形成されている。この保持孔65には、球体66が転動可能に保持される。球体66の保持は、上記孔部63内の保持孔65の内周側に位置するように収納される短筒状の支持環67の挿入で行う。   And the holding | maintenance hole 65 penetrated inside and outside is suitably formed in the front end side of the said hole part 63 with the circumferential direction with three or four pieces. The spherical body 66 is held in the holding hole 65 so as to be able to roll. The spherical body 66 is held by inserting a short cylindrical support ring 67 that is housed so as to be positioned on the inner peripheral side of the holding hole 65 in the hole 63.

本体部材61における上記保持孔65より先端側の軸心部分には、上記孔部63よりも小径の連通孔部68とそれより大径の先端孔部69とが形成されており、この先端孔部69には、逆止弁32が保持される。逆止弁32は、上記先端ロッド21a内の導通孔部22を通して注入されるエアや水、薬液などの流体の通過は許容するが、削孔カスを通さないようにするためのもので、ボール32aと、該ボール32aを付勢するねじりコイルばね32bで構成されている。   A communication hole 68 having a diameter smaller than that of the hole 63 and a tip hole 69 having a diameter larger than that of the hole 63 are formed at the axial center of the main body member 61 on the tip side of the holding hole 65. The check valve 32 is held in the portion 69. The check valve 32 allows the passage of fluids such as air, water, and chemicals injected through the conduction hole 22 in the tip rod 21a, but prevents the drill hole from passing through. 32a and a torsion coil spring 32b for urging the ball 32a.

このように形成された本体部材61の被係合筒状部62と、上記先端ロッド21aの係合筒状部25は、筒状の芯部材35が挿入されることによって接続される。芯部材35は、本体部材61や先端ロッド21aとは別の部材からなり、軸心部分に長さ方向に貫通する貫通孔部35aを有したパイプ状である。そしてその太さは、係合筒状部25と被係合筒状部62の内周側の孔部26,63に嵌合対応する太さである。芯部材35が存在すればそれでよいが、より好ましくは、芯部材35の外周面が孔部26,63の内周面に面接触するように設定されるのがよい。また、芯部材35の長さは、係脱爪部27,64が周方向で重なり合う(オーバーラップする)長さよりも長く設定されている。   The engaged cylindrical part 62 of the main body member 61 and the engaging cylindrical part 25 of the tip rod 21a are connected by inserting the cylindrical core member 35. The core member 35 is made of a member different from the main body member 61 and the distal end rod 21a, and has a pipe shape having a through-hole portion 35a penetrating in the length direction in the axial center portion. The thickness is a thickness corresponding to fitting into the holes 26 and 63 on the inner peripheral side of the engaging cylindrical portion 25 and the engaged cylindrical portion 62. If the core member 35 is present, it is sufficient, but more preferably, the outer peripheral surface of the core member 35 is set so as to be in surface contact with the inner peripheral surfaces of the holes 26 and 63. The length of the core member 35 is set to be longer than the length in which the engagement / disengagement claw portions 27 and 64 overlap (overlap) in the circumferential direction.

芯部材35の外周面に形成された2本の溝は、削孔動作に伴って互いに衝突し圧力を受ける上記係脱爪部27,64の対向面が変形して径方向に膨れ上がった時にそれを許容するためのぬすみ部35b,35bであり、係脱爪部27,64の軸方向における相対向する対向面部分に対応する部位に形成されている。   The two grooves formed on the outer peripheral surface of the core member 35 are swelled in the radial direction when the opposing surfaces of the engaging and disengaging claw portions 27 and 64 that collide with each other and receive pressure in response to the drilling operation are deformed. It is the thin part 35b and 35b for allowing it, and is formed in the site | part corresponding to the opposing surface part which the engagement / disengagement nail | claw parts 27 and 64 mutually oppose.

このようなぬすみ部35b,35bを形成するほか、又はぬすみ部35b,35bの形成と併せて、係脱爪部27,64の先端の角部に傾斜面を形成して芯部材35との間にぬすみ部が形成されるようにするもよい。   In addition to forming such thin portions 35b, 35b, or in combination with the formation of the thin portions 35b, 35b, an inclined surface is formed at the corners of the tips of the engagement / disengagement claw portions 27, 64 so as to be between the core member 35. A thin portion may be formed.

なお、先端ロッド21aと削孔ビット部材31との間の分離は、上記係合筒状部25と被係合筒状部62との間で行われるので、削孔のたびに芯部材35を取り外して使い捨てにして、疲労により強度の劣化した芯部材35を誤って使用することを回避するには、芯部材35を本体部材61側に圧入して、分離時に芯部材35が削孔ビット部材31とともに削孔内に残るようにするとよい。そのためには、図2に仮想線で示したように、被係合筒状部62の孔部63の所定範囲に若干小径となる部分を形成すればよく、簡単である。   Since the separation between the tip rod 21a and the drill bit member 31 is performed between the engaging cylindrical portion 25 and the engaged cylindrical portion 62, the core member 35 is removed every time a hole is drilled. In order to avoid the accidental use of the core member 35 whose strength has deteriorated due to fatigue by removing it and making it disposable, the core member 35 is press-fitted into the main body member 61 side, and the core member 35 is drilled bit member during separation. It is good to leave it in a drilling hole with 31. For this purpose, as shown by the phantom line in FIG. 2, a portion having a slightly smaller diameter may be formed in a predetermined range of the hole 63 of the engaged cylindrical portion 62, which is simple.

ビット部材71は、本体部材61よりも大径で、先端部は適宜の形状に形成され、超硬合金からなるチップ72が固定されている。そしてこのビット部材71には、本体部材61の上記先端孔部69に連通する中央孔部73が形成され、この中央孔部73から先には複数本の噴孔74が形成されている。   The bit member 71 has a diameter larger than that of the main body member 61, the tip portion is formed in an appropriate shape, and a chip 72 made of cemented carbide is fixed. The bit member 71 is formed with a central hole 73 communicating with the tip hole 69 of the main body member 61, and a plurality of injection holes 74 are formed at the tip of the central hole 73.

上記先端スリーブ41は、上記球体66によって、削孔ビット部材31を構成する本体部材61の外周面に相対移動可能に取り付けられる。相対移動は、先端スリーブ51の長さ方向および周方向に適宜範囲で行われるように設定される。   The tip sleeve 41 is attached to the outer peripheral surface of the body member 61 constituting the drill bit member 31 by the sphere 66 so as to be relatively movable. The relative movement is set so as to be performed in an appropriate range in the length direction and the circumferential direction of the tip sleeve 51.

この先端スリーブ41は、内周面における上記球体66に対応する部位に凹部42を有する。凹部42は、先端スリーブ41を本体部材61上で相対移動可能にする緩衝用の隙間を有した大きさである。   The tip sleeve 41 has a recess 42 at a portion corresponding to the sphere 66 on the inner peripheral surface. The recess 42 has a size having a buffering gap that allows the distal end sleeve 41 to relatively move on the main body member 61.

先端スリーブ41の先端部には、上記削孔ビット部材31におけるビット部材71の後端部に形成された噛合部75と、相対移動可能に噛合する噛合部43が形成されている(図7、図8参照)。   At the distal end portion of the distal sleeve 41, a meshing portion 75 formed at the rear end portion of the bit member 71 in the drilling bit member 31 and a meshing portion 43 meshing so as to be relatively movable are formed (FIG. 7, FIG. 7). (See FIG. 8).

また、先端スリーブ41の内周面における上記凹部42よりも先端側には、本体部材61との間をシールするシール部材44が設けられている。   Further, a seal member 44 that seals between the body member 61 and the body member 61 is provided on the inner peripheral surface of the tip sleeve 41 on the tip side of the recess 42.

一方、先端スリーブ41の後端部には、接続用の接続ねじ部45が形成されており、上記ケーシングパイプ51が接続される。図中46は、先端ロッド21aとの間をシールするシール部材である。   On the other hand, a connection thread portion 45 for connection is formed at the rear end portion of the front end sleeve 41, and the casing pipe 51 is connected thereto. In the figure, reference numeral 46 denotes a seal member that seals between the distal end rod 21a.

先端スリーブ41を本体部材61に嵌合するには、保持孔65に球体66を保持しておき、先端スリーブ41を本体部材61に差し込む。つぎにこの状態で、本体部材61の孔部63内に、適宜の治具を用いて支持環67を挿入する。すると、支持環67が球体66を外周側に押し出し、この押し出しにより、球体66は凹部42内に収まり嵌め殺し状態になる。   In order to fit the tip sleeve 41 to the main body member 61, the spherical body 66 is held in the holding hole 65, and the tip sleeve 41 is inserted into the main body member 61. Next, in this state, the support ring 67 is inserted into the hole 63 of the main body member 61 using an appropriate jig. Then, the support ring 67 pushes the sphere 66 to the outer peripheral side, and by this push, the sphere 66 fits in the recess 42 and is put into a fitted state.

上記ケーシングパイプ51は、塩化ビニルなどの合成樹脂製で、所定長さに形成された円筒状である。そして先端に、上記接続ねじ部45に螺合する第1ねじ部51aが形成され、後端には、この第1ねじ部51aに螺合可能な形状の第2ねじ部(図示せず)が形成された構造で、順次継ぎ足して使用される。   The casing pipe 51 is made of a synthetic resin such as vinyl chloride and has a cylindrical shape with a predetermined length. A first screw portion 51a that is screwed into the connection screw portion 45 is formed at the front end, and a second screw portion (not shown) that can be screwed into the first screw portion 51a is formed at the rear end. In the formed structure, it is used by sequentially adding.

また、ケーシングパイプ51には、薬剤を噴射するため、図7、図8に示したように、逆止弁付きの複数の噴射孔52が適宜間隔おきに形成されている。   Moreover, in order to inject | pour a chemical | medical agent in the casing pipe 51, as shown in FIG.7, FIG.8, the several injection hole 52 with a non-return valve is formed in the space | interval suitably.

このように構成された削孔工具11では、図1に示したようにロッド21を削孔ビット部材31に接続した状態でパーカッションマシンから左回りの回転力と打撃力を削孔ビット部材31に伝達すると、図5に示したように、削孔ビット部材31は、その回転力と打撃力を受けて、地盤や岩盤内に切り込む。このとき、回転力と打撃力を受ける削孔ビット部材31に接触しているのは先端スリーブ41であるが、この先端スリーブ41の接触は、球体66と凹部52とからなる嵌合とシール部材44,46を介してなされている。そして、球体66と凹部52の間には、隙間(余裕、あそび)を有しているため、回転力や打撃力による振動は緩和され、先端スリーブ41の後端部に接続されたケーシングパイプ51に掛かる負荷を軽減できる。   In the drilling tool 11 configured as described above, the counterclockwise rotational force and striking force are applied to the drill bit member 31 with the rod 21 connected to the drill bit member 31 as shown in FIG. When transmitted, as shown in FIG. 5, the drilling bit member 31 receives its rotational force and striking force and cuts into the ground or rock. At this time, it is the tip sleeve 41 that is in contact with the drill bit member 31 that receives the rotational force and the striking force. The tip sleeve 41 is contacted with the fitting formed by the sphere 66 and the recess 52 and the seal member. 44, 46. Since there is a gap (margin, play) between the sphere 66 and the recess 52, vibration due to rotational force or striking force is mitigated, and the casing pipe 51 connected to the rear end portion of the tip sleeve 41. Can reduce the load.

しかも、球体66は転動可能であるため、球体66と凹部52の衝突時の衝撃も緩和できるため、ケーシングパイプ51に掛かる負荷はより一そう軽減される。   In addition, since the sphere 66 can roll, the impact at the time of collision between the sphere 66 and the recess 52 can be reduced, so that the load applied to the casing pipe 51 is further reduced.

さらに、先端スリーブ41は削孔ビット部材31の本体部材61や先端ロッド21aに対してシール部材44,46を介して接続されているので、先端スリーブ41はいたずらにがたつくことはない。そのうえ、本体部材61や先端ロッド21aと先端スリーブ41との間に泥土などが浸入するのを防止し、緩衝を行う嵌合構造を保護できる。   Furthermore, since the tip sleeve 41 is connected to the main body member 61 and the tip rod 21a of the drill bit member 31 via the seal members 44 and 46, the tip sleeve 41 does not rattle. In addition, mud or the like can be prevented from entering between the main body member 61 or the tip rod 21a and the tip sleeve 41, and the fitting structure for buffering can be protected.

また、削孔などの作業終了後には、ロッド21に対して図6に示した如く、削孔の時とは逆、すなわち右回りの回転力を加えれば、ロッドはすべて一体であるので、先端ロッド21aを削孔ビット部材31から簡単に分離することができる。抜き取ったロッド21は、カップリング部材24を外せば各部材ごとに分離できる。   Further, after the completion of the work such as drilling, as shown in FIG. 6, the rods are all united by applying a counterclockwise rotation force, that is, clockwise, as shown in FIG. The rod 21a can be easily separated from the drill bit member 31. The extracted rod 21 can be separated for each member by removing the coupling member 24.

以上のような削孔工具を用いた作業例を以下に説明する。
(作業例1)
削孔しながら薬液注入を行う場合には、図7に示したように、まず、噴孔74からエア又は水を噴射しながら所定深さの削孔(削孔工程)を行い(a)、削孔動作を止めてからエア又は水に代えて所望の薬液を噴孔74から噴射(薬液注入工程)する(b)。または、上記削孔(削孔工程)と薬液噴射(薬液注入工程)を同時に行う。
このような動作を順次繰り返して、所定の深さまで削孔と薬液注入を行う(c)。
最後に、ロッド21を右に回転してロッドのみを回収する(d)。
An example of work using the above drilling tool will be described below.
(Working example 1)
In the case of injecting a chemical solution while drilling, as shown in FIG. 7, first, a hole having a predetermined depth (drilling process) is performed while injecting air or water from the nozzle hole 74 (a), After the drilling operation is stopped, a desired chemical solution is injected from the injection hole 74 instead of air or water (chemical solution injection step) (b). Alternatively, the hole drilling (drilling process) and the chemical liquid injection (chemical liquid injection process) are performed simultaneously.
Such operations are sequentially repeated to perform drilling and chemical injection to a predetermined depth (c).
Finally, the rod 21 is rotated to the right to collect only the rod (d).

(作業例2)
所定深さの削孔(削孔工程)をしてから薬液注入(薬液注入工程)を行う場合には、図8に示したように、まず、噴孔74からエア又は水を噴射しながら所定深さの削孔を行う(a,b)。次に、ロッド21を右に回転してロッドのみを回収する(c)。続いて、薬液注入用の注入管81をロッド21に代えて差し込んで、注入管81を利用して薬液注入を行う(d)。薬液は、ケーシングパイプ51に設けられた逆止弁付きの噴射孔52から噴出する。
(Working example 2)
When a chemical solution injection (chemical solution injection step) is performed after a predetermined depth of holes (drilling step), as shown in FIG. Depth drilling is performed (a, b). Next, the rod 21 is rotated to the right to collect only the rod (c). Subsequently, the injection pipe 81 for injecting the chemical liquid is inserted in place of the rod 21, and the chemical liquid is injected using the injection pipe 81 (d). The chemical liquid is ejected from an injection hole 52 with a check valve provided in the casing pipe 51.

上記例のようにして、削孔作業と薬液注入作業は行われる。
上記ロッド21と削孔ビット部材31との間は、長さ方向において相互に係合する係合筒状部25および被係合筒状部62と、これらの内側に挿入された芯部材35とにより接続される。そして、芯部材が2個の筒状部間にまたがるように介在して2個の筒状部の接続状態を保持するとともに、芯となって、内外で重合する部分において、その接続状態を補強する。
The drilling operation and the chemical solution injection operation are performed as in the above example.
Between the rod 21 and the drill bit member 31, there are an engaging cylindrical portion 25 and an engaged cylindrical portion 62 that are engaged with each other in the length direction, and a core member 35 inserted inside them. Connected by The core member is interposed so as to straddle between the two cylindrical portions to maintain the connection state of the two cylindrical portions, and the connection state is reinforced at the portion that becomes the core and overlaps inside and outside. To do.

このため、係合筒状部25と被係合筒状部62には、厚みを部分的に薄くしてしまうねじ等の係脱構造を有する場合に比して、部材の厚みを均一にして脆弱部分のない形状にすることができるとともに、その厚さを確保することができる。この結果、部材とその接続部分の強度を保つことができる。つまり、上述例のように削孔工具11の軸心部分に貫通孔を有する場合でも、また、削孔工具の小径化(小型化)を図る場合でも、充分な強度を有する削孔工具11となる。   For this reason, compared with the case where the engaging cylindrical part 25 and the engaged cylindrical part 62 have engagement / disengagement structures such as screws that partially reduce the thickness, the thickness of the member is made uniform. While being able to make a shape without a weak part, the thickness can be ensured. As a result, the strength of the member and its connecting portion can be maintained. That is, even when the through hole is provided in the axial center portion of the drilling tool 11 as in the above-described example, or when the diameter of the drilling tool is to be reduced (downsized), the drilling tool 11 having sufficient strength can be obtained. Become.

また、芯部材35の長さは、係合筒状部25と被係合筒状部62の係脱爪部27,64の長さよりも長く設定されているので、芯部材35が接続部分の間により深く挿入されることになり、剛性がさらに高まる。   Moreover, since the length of the core member 35 is set longer than the lengths of the engaging and disengaging claw portions 27 and 64 of the engaging cylindrical portion 25 and the engaged cylindrical portion 62, the core member 35 is connected to the connecting portion. It will be inserted deeper into the gap, further increasing the rigidity.

さらに、芯部材35ぬすみ部35b,35bを有するので、削孔動作によって2個の係脱爪部27,64の先端面が対向面に対して互いに激しく当たって変形し、径方向に膨れ上がっても、力を逃がすことができる。この結果、削孔工具11の耐久性を高めることができる。   Further, since the core member 35 has the thinning portions 35b and 35b, the distal end surfaces of the two engaging / disengaging claw portions 27 and 64 are struck violently against each other by the drilling operation, and are deformed and swollen in the radial direction. Even let the power escape. As a result, the durability of the drilling tool 11 can be increased.

上記係合筒状部25と被係合筒状部62との係脱は、鉤型の係脱爪部27,64で行う構造であるので、回収作業が簡単である。そのうえ、係脱爪部27,64の形状が脆弱部分のない簡素な形状であるので、削孔時の衝撃で不測に破損したりするおそれを無くし、堅固な着脱構造を構成でき、確実な削孔と必要部材の回収を実現できる。   Since the engagement tubular portion 25 and the engaged tubular portion 62 are engaged and disengaged by the hook-shaped engagement / disengagement claw portions 27 and 64, the collection operation is simple. In addition, since the engagement / disengagement claw portions 27 and 64 have a simple shape without a fragile portion, there is no risk of accidental damage due to an impact at the time of drilling. Recovery of holes and necessary members can be realized.

そしてまた、削孔動作に際しては、上述の如くケーシングパイプ51に掛かる負荷を抑えることができるので、ケーシングパイプ51がひび割れたりする不測の損傷を回避できる。   In addition, during the hole drilling operation, the load applied to the casing pipe 51 can be suppressed as described above, so that it is possible to avoid unexpected damage such as cracking of the casing pipe 51.

また、ロッド21に導通孔部22が形成されるとともに、芯部材35には貫通孔部35aが形成されており、削孔ビット部材31には中央孔部73と噴孔74が形成されているので、削孔をしながら、または削孔と交互に薬液注入を行うことも可能で、作業効率を向上することもできる。   The rod 21 is formed with the conduction hole portion 22, the core member 35 is formed with the through hole portion 35 a, and the drilling bit member 31 is formed with the central hole portion 73 and the injection hole 74. Therefore, it is possible to inject the chemical solution while drilling or alternately with the drilling, and the working efficiency can be improved.

さらに、作業後に埋め殺しにされるケーシングパイプ51は合成樹脂製であるので、後の掘削等の作業に影響はなく、作業効率を向上することができる。   Furthermore, since the casing pipe 51 to be buried after the work is made of synthetic resin, there is no influence on the work such as excavation and the work efficiency can be improved.

またケーシングパイプ51が逆止弁付きの噴射孔52を有しているので、削孔を行った後に薬液注入を行う場合に、ケーシングパイプ51を抜き取らずに埋めた状態のまま作業が行える。つまり、作業の簡単化を図ることができる。   Moreover, since the casing pipe 51 has the injection hole 52 with a check valve, when performing chemical | medical solution injection | pouring after drilling, the operation | work can be performed with the casing pipe 51 filled without being extracted. That is, the work can be simplified.

以下、その他の例を説明する。説明に際して、上記構成との同一の部位については同一の符号を付してその詳しい説明を省略する。   Other examples will be described below. In the description, the same portions as those in the above configuration are denoted by the same reference numerals, and detailed description thereof is omitted.

図9は、ロッド21を削孔ビット部材31に対して着脱可能に接続する接続部分に、芯部材35のほかに、補助部材36を挿入した例である。   FIG. 9 shows an example in which an auxiliary member 36 is inserted in addition to the core member 35 to a connecting portion that detachably connects the rod 21 to the drill bit member 31.

すなわち、補助部材36は、芯部材35と同径のパイプ状に形成され、その長さは、芯部材35よりも短く設定される。   That is, the auxiliary member 36 is formed in a pipe shape having the same diameter as the core member 35, and the length thereof is set shorter than that of the core member 35.

この補強部材36は、削孔ビット部材31の本体部材61内に圧入されるもので、球体66と支持環67とによる先端スリーブ41の接続に際して、支持環67の後ろ側に圧入され、支持環67を所定位置に保持するものである。そして、補助部材36の後ろ側に、適宜の隙間を有するようにして、先端ロッド21aに対して芯部材35が挿入されている。つまり、芯部材35を分割したような構造である。なお、上記芯部材35の挿入は圧入で行うもよい。   The reinforcing member 36 is press-fitted into the main body member 61 of the drill bit member 31, and when the tip sleeve 41 is connected by the sphere 66 and the support ring 67, it is press-fitted to the rear side of the support ring 67, 67 is held at a predetermined position. The core member 35 is inserted into the distal end rod 21a so as to have an appropriate gap behind the auxiliary member 36. That is, the core member 35 is divided. The core member 35 may be inserted by press-fitting.

補助部材36が、支持環67を押えて保持する役割をする一方、芯部材35が接続状態の保持と補強をする役割をするので、それぞれの役割負担を分けることができる。この結果、打撃による衝撃で球体66から支持環67を経て芯部材35に伝達される衝撃を補助部材36と、該補助部材36と芯部材35との間の隙間で緩和して、強度をさらに高めることができる。   While the auxiliary member 36 serves to press and hold the support ring 67, the core member 35 serves to hold and reinforce the connection state, so that each role burden can be divided. As a result, the impact transmitted by the impact from the sphere 66 through the support ring 67 to the core member 35 is mitigated by the auxiliary member 36 and the gap between the auxiliary member 36 and the core member 35 to further increase the strength. Can be increased.

図10は、削孔ビット部材31と先端スリーブ41との接続状態の他の例を示している。すなわち、削孔ビット部材31と先端スリーブ41とのそれぞれの対向面に凹溝61a,41aが形成され、この凹溝61a,41a間に、削孔ビット部材31と先端スリーブ41とを相対回転可能に接続し、接続状態を保持するための抜け止め部材としての球体66が収納されている。   FIG. 10 shows another example of the connection state between the drill bit member 31 and the tip sleeve 41. That is, concave grooves 61a and 41a are formed on the opposing surfaces of the drill bit member 31 and the tip sleeve 41, and the drill bit member 31 and the tip sleeve 41 can be rotated relative to each other between the concave grooves 61a and 41a. A spherical body 66 is housed as a retaining member for connecting to and maintaining the connected state.

つまり、削孔ビット部材31の本体部材61における上記孔部63が形成されている範囲内の外周面の全周に、断面略半円形状をなす上記凹溝61aが形成され。一方、先端スリーブ41の内周面における上記凹溝61aに対応する部位の全周に、断面略半円形状をなす上記凹溝41aが形成されている。そして、これら凹溝61a,41a間に、球体66が転動可能に収納されている(図11参照)。なお、各凹溝61a,41aは、先端スリーブ41と本体部材61をその軸方向に相対移動可能にする緩衝用の隙間を有した大きさである。また、上記球体66を収納するため、先端スリーブ41の外周面には、内外に貫通する投入孔41bが形成され、この投入孔41bには、投入孔41bを閉塞する蓋体41cが固定される。   That is, the concave groove 61a having a substantially semicircular cross section is formed on the entire circumference of the outer peripheral surface of the main body member 61 of the drill bit member 31 in the range where the hole 63 is formed. On the other hand, the groove 41a having a substantially semicircular cross section is formed on the entire circumference of the portion corresponding to the groove 61a on the inner peripheral surface of the tip sleeve 41. And the spherical body 66 is accommodated so that rolling is possible between these concave grooves 61a and 41a (refer FIG. 11). Each of the concave grooves 61a and 41a has a size having a buffering gap that allows the distal end sleeve 41 and the main body member 61 to move relative to each other in the axial direction. In addition, in order to store the sphere 66, an insertion hole 41b penetrating inward and outward is formed on the outer peripheral surface of the tip sleeve 41, and a lid body 41c for closing the insertion hole 41b is fixed to the insertion hole 41b. .

上記球体66は、鋼球のほか、たとえばウレタンゴム製のものであるもよい。また、抜け止め部材として、球体66のほか、線状をなす弾性体を用いることもできる。図12がその一例を示したもので、ウレタンゴム製の円形断面の線状体66aである。図示はしないが、線状体66aはコイルばねで構成することもできる。線状体66aの収納は、凹溝61a,41aによってできるリング状の空間に対して接線方向に延びる投入孔41bから線状体66aを差し込んで、所定長さにおいて切断してから押込み、蓋体41cで投入孔41bを閉塞するとよい。線状体66aは、両端が接しておらずとも所期の目的を達成することができる。線状体66aを用いると、球体を用いた場合に比して肉厚の薄い構造部分に適用することができるとともに、接続作業も容易である。   The sphere 66 may be made of, for example, urethane rubber in addition to a steel ball. In addition to the spherical body 66, a linear elastic body may be used as the retaining member. FIG. 12 shows an example thereof, which is a linear body 66a having a circular cross section made of urethane rubber. Although not shown, the linear body 66a can also be constituted by a coil spring. To store the linear body 66a, the linear body 66a is inserted into the ring-shaped space formed by the concave grooves 61a and 41a from the insertion hole 41b extending in the tangential direction, cut at a predetermined length, and then pushed into the lid body. The injection hole 41b may be closed with 41c. The linear body 66a can achieve the intended purpose even if both ends are not in contact with each other. When the linear body 66a is used, it can be applied to a structural part having a small thickness as compared with the case of using a sphere, and the connection work is also easy.

このような構成によると、削孔に際して回転力と打撃力が作用する時に、凹溝61a,41aと抜け止め部材(球体66,線状体66a)の存在と、これらの間に形成された隙間(余裕、あそび)の存在とにより、振動が緩和され、先端スリーブ41の後端部に接続されたケーシングパイプ51にかかる負荷を軽減できるとともに、先端スリーブ41は削孔ビット部材31に対して周方向に自在に回転する。   According to such a configuration, when rotational force and impact force are applied during drilling, the presence of the recessed grooves 61a and 41a and the retaining members (the sphere 66 and the linear body 66a) and the gap formed between them. Due to the presence of (margin, play), the vibration is mitigated and the load applied to the casing pipe 51 connected to the rear end portion of the tip sleeve 41 can be reduced. Rotates freely in any direction.

抜け止め部材が球体66であると球体66は転動可能であるため、また抜け止め部材がウレタンゴムからなる場合にはそれ自身が弾性を有するため、抜け止め部材と凹溝61a,41aの衝突時の衝撃も緩和できる。この結果、先端スリーブ41に連結されたケーシングパイプ51にかかる負荷はさらに軽減される。   If the retaining member is a sphere 66, the sphere 66 can roll, and if the retaining member is made of urethane rubber, it has elasticity, so that the retaining member and the grooves 61a and 41a collide with each other. The impact of time can be reduced. As a result, the load applied to the casing pipe 51 connected to the tip sleeve 41 is further reduced.

この発明の構成と、上記一形態の構成との対応において、
この発明の筒状部は、上記一形態における係合筒状部25および被係合筒状部62に対応するも、
この発明は、上記一形態の構成のみに限定されるものではなく、その他の様々な形態を採用することができる。
In the correspondence between the configuration of the present invention and the configuration of the above-described embodiment,
The cylindrical portion of the present invention corresponds to the engaging cylindrical portion 25 and the engaged cylindrical portion 62 in the above-described embodiment.
The present invention is not limited to the configuration of the above-described one form, and various other forms can be adopted.

削孔工具の断面図。Sectional drawing of a drilling tool. 削孔工具の分解状態の断面図。Sectional drawing of the decomposition | disassembly state of a drilling tool. 要部の分解斜視図。The disassembled perspective view of the principal part. 図1におけるA−A部分の要部断面図。FIG. 2 is a cross-sectional view of a main part of the AA portion in FIG. 1. 作用状態の断面図。Sectional drawing of an action state. 作用状態の断面図。Sectional drawing of an action state. 作業工程を示す説明図。Explanatory drawing which shows a work process. 作業工程を示す説明図。Explanatory drawing which shows a work process. 他の例に係る削孔工具の断面図。Sectional drawing of the drilling tool which concerns on another example. 他の例に係る削孔工具の断面図。Sectional drawing of the drilling tool which concerns on another example. 図10におけるB−B線矢視断面図。FIG. 11 is a cross-sectional view taken along line B-B in FIG. 10. 他の例を示す断面図。Sectional drawing which shows another example.

符号の説明Explanation of symbols

11…削孔工具
21…ロッド
21a…先端ロッド
25…係合筒状部
27…係脱爪部
31…削孔ビット部材
35…芯部材
35a…貫通孔部
35b…ぬすみ部
62…被係合筒状部
64…係脱爪部
DESCRIPTION OF SYMBOLS 11 ... Drilling tool 21 ... Rod 21a ... End rod 25 ... Engagement cylindrical part 27 ... Engaging / disengaging claw part 31 ... Drilling bit member 35 ... Core member 35a ... Through-hole part 35b ... Nuts part 62 ... Engaged cylinder -Like part 64 ... engaging / disengaging nail part

Claims (5)

削孔のための動力を伝達するロッドと、該ロッドの先に設けられて削孔を行う削孔ビット部材とを有し、上記ロッドの先端部と削孔ビット部材の後端部との間には、ロッドを削孔ビット部材に対して着脱可能に接続する着脱構造が設けられた削孔工具であって、
上記着脱構造が、長さ方向において相互に係合する2個の筒状部を有するとともに、
これら筒状部の内側に、筒状部間にまたがるように芯部材を挿入して構成され
該芯部材が、いずれか一方の筒状部に圧入されるものである
削孔工具。
A rod for transmitting power for drilling; and a drill bit member provided at the tip of the rod for drilling; between the tip of the rod and the rear end of the drill bit member Is a drilling tool provided with a detachable structure for detachably connecting the rod to the drilling bit member,
The detachable structure has two cylindrical portions that engage with each other in the length direction,
Inside these tubular parts, a core member is inserted so as to straddle between the tubular parts ,
The drilling tool , wherein the core member is press-fitted into any one of the cylindrical portions .
前記芯部材と、前記2個の筒状部の長さ方向における相対向する対向面部との間に、ぬすみ部が形成された
請求項1に記載の削孔工具。
The drilling tool according to claim 1, wherein a thinning portion is formed between the core member and opposing surface portions facing each other in the length direction of the two cylindrical portions.
前記芯部材の長さが、筒状部同士の係合部分の長さよりも長く設定された
請求項1または請求項2に記載の削孔工具。
The drilling tool according to claim 1 or 2 , wherein a length of the core member is set to be longer than a length of an engagement portion between the cylindrical portions.
前記芯部材の軸心部分に、長さ方向に貫通する貫通孔部が形成された
請求項1から請求項のうちのいずれか一項に記載の削孔工具。
The drilling tool according to any one of claims 1 to 3 , wherein a through-hole portion penetrating in a length direction is formed in an axial center portion of the core member.
前記各筒状部の相互間には、ロッドを一方向に回転したときに係合し、他方向に回転したときに上記係合が外れる鉤型の係脱爪部が形成された
請求項1から請求項のうちのいずれか一項に記載の削孔工具。
2. A hook-shaped engagement / disengagement claw portion is formed between the cylindrical portions that engages when the rod rotates in one direction and disengages when the rod rotates in the other direction. The drilling tool according to any one of claims 1 to 4 .
JP2006300125A 2006-11-06 2006-11-06 Drilling tool Expired - Fee Related JP4990597B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006300125A JP4990597B2 (en) 2006-11-06 2006-11-06 Drilling tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006300125A JP4990597B2 (en) 2006-11-06 2006-11-06 Drilling tool

Publications (2)

Publication Number Publication Date
JP2008115611A JP2008115611A (en) 2008-05-22
JP4990597B2 true JP4990597B2 (en) 2012-08-01

Family

ID=39501780

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006300125A Expired - Fee Related JP4990597B2 (en) 2006-11-06 2006-11-06 Drilling tool

Country Status (1)

Country Link
JP (1) JP4990597B2 (en)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56109485U (en) * 1980-01-24 1981-08-25
JPH0355673Y2 (en) * 1986-11-27 1991-12-11
JPH07158368A (en) * 1993-12-10 1995-06-20 Yoshida Tekkosho:Kk Excavation drill
JP3329268B2 (en) * 1998-05-15 2002-09-30 三菱マテリアル株式会社 Drilling tools
JP3468700B2 (en) * 1998-09-07 2003-11-17 株式会社ササキ技建 Ground drilling material and drainage method using it
JP2000204870A (en) * 1999-01-19 2000-07-25 Kfc Ltd Boring device
JP3726179B2 (en) * 1999-07-23 2005-12-14 東邦金属株式会社 Drilling device
JP3903881B2 (en) * 2001-09-26 2007-04-11 三菱マテリアル株式会社 Drilling tools
JP2004211491A (en) * 2003-01-08 2004-07-29 Mitsubishi Materials Corp Excavating tool
JP2006045766A (en) * 2004-07-30 2006-02-16 Sato Kigyo:Kk Soil replacing method and joint device used therefor
JP2007046301A (en) * 2005-08-09 2007-02-22 Alloy Kogyo Kk Drilling tool and chemical feeding method

Also Published As

Publication number Publication date
JP2008115611A (en) 2008-05-22

Similar Documents

Publication Publication Date Title
JP2007046301A (en) Drilling tool and chemical feeding method
JP4990598B2 (en) Drilling tool
JP4990597B2 (en) Drilling tool
JP2007046300A (en) Rod and coupling sleeve for drilling machine
KR20110007956A (en) Double-pipe drilling tools
JP4765950B2 (en) Drilling tools and drilling methods
JPH09328983A (en) Down-the-hole hammer
KR200352180Y1 (en) Apparatus having a detachable ring bit for drilling a hole in ground
JP6307002B2 (en) Ground drilling method and ground drilling device
JP4744476B2 (en) Drilling device
JP2018062805A (en) Core material embedding method
JP2007291693A (en) Rock bit apparatus with striking mechanism
JP2008115613A (en) Drilling tool
KR100937766B1 (en) Hammer Bit Apparatus
JP2007231733A (en) Double pipe type excavating tool
JP2005155209A (en) Universal excavator and ground improvement method
JP3884428B2 (en) Natural mountain reinforcement pipe
JP4522909B2 (en) Tubular unit for excavation and ground improvement method using the same
JP2020186568A (en) Attaching jig of stop ring, and attaching method of stop ring using the attaching jig
JP3015574U (en) casing
US20230258043A1 (en) A drill assembly for percussive drilling
JP3994726B2 (en) Double pipe drilling tools
JP4059123B2 (en) Engagement structure and lock bolt construction method
RU70540U1 (en) DEVICE FOR CONNECTING A DRILL BIT WITH A SUBMERSIBLE SHOCK DRUM
JP3574608B2 (en) Bowling rod joints

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20091105

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20091116

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110829

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120110

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120312

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120403

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20120502

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150511

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees