JPH04166596A - Cutter bit for shield excavator - Google Patents

Cutter bit for shield excavator

Info

Publication number
JPH04166596A
JPH04166596A JP28996490A JP28996490A JPH04166596A JP H04166596 A JPH04166596 A JP H04166596A JP 28996490 A JP28996490 A JP 28996490A JP 28996490 A JP28996490 A JP 28996490A JP H04166596 A JPH04166596 A JP H04166596A
Authority
JP
Japan
Prior art keywords
base metal
tip
carbide
tips
cutter bit
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.)
Granted
Application number
JP28996490A
Other languages
Japanese (ja)
Other versions
JPH07119554B2 (en
Inventor
Hiroyuki Hamaguchi
浜口 広幸
Hirozo Sakamoto
坂本 博三
Yoshinobu Shimoitani
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.)
SUTAAROI SANGYO KK
Okumura Machinery Corp
Original Assignee
SUTAAROI SANGYO KK
Okumura Machinery Corp
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 SUTAAROI SANGYO KK, Okumura Machinery Corp filed Critical SUTAAROI SANGYO KK
Priority to JP2289964A priority Critical patent/JPH07119554B2/en
Publication of JPH04166596A publication Critical patent/JPH04166596A/en
Publication of JPH07119554B2 publication Critical patent/JPH07119554B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Excavating Of Shafts Or Tunnels (AREA)
  • Earth Drilling (AREA)

Abstract

PURPOSE:To prevent the decline of excavation ability with lack of chips on the upper stage by arranging a plurality of super-hard chips in a multi-stage to the front end of the cutting direction at least of the base metal from the front end of the base metal to the base end side to bury. CONSTITUTION:A fixing section provided with a fixed pin insertion hole 2a is formed to the base end section of the base metal of a cutter bit 1 and, at the same time, a rake face is formed on the front end of the base metal, and an angle of relief theta1 is an approximate 15 deg.. The front end oft he cutting direction (a) of the base metal 2 is inclined forward, and an a rake angle theta2 is an approximate 15 deg.. A plurality of super-hard chips 3 are buried into the front end of the cutting direction (a) of the base metal 2 and, at the same time, the chips 3 are arrange in a multi-stage from the front end of the base metal 2 to the base end side. In addition, super-hard chips 3A are arranged against the chips 3 in a multi-stage in the shape of a tooth insertion to bury, and an angle of tooth insertion theta3 is approximate 45 deg..

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、シールド掘進機用のカッタービットの改良に
関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a cutter bit for a shield tunneling machine.

〔従来の技術〕[Conventional technology]

シールド掘進機は、1つの工事区間をカッタービットの
交換なしで掘削を完了することが前提とされている。
It is assumed that a shield excavator can complete excavation of one construction section without replacing the cutter bit.

しかし、従来のシールド掘進機用のカッタービットは、
第8図に示すように超硬チップ81を台金82の切削が
わ端面の先端部にのみ埋め込んで構成しているので、掘
進中に台金82が摩耗したり超硬チップ81が礫層等に
当たって台金82から欠落すると、掘削能力が低下し、
場合によっては掘進が不可能になるという問題があった
However, the cutter bit for conventional shield tunneling machines is
As shown in FIG. 8, since the carbide tip 81 is embedded only in the tip of the cutting side end face of the base metal 82, the base metal 82 may wear out during excavation, and the carbide tip 81 may be buried in the gravel layer. If it falls off from the base metal 82 due to a collision, etc., the excavation capacity will decrease,
There was a problem that in some cases, excavation became impossible.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

本発明は上記の点に鑑みてなされたものであって、その
目的とするところは超硬チップが欠落しても予備の超硬
チップが台金の切削がわ端面の先端に位置することによ
り、掘削能力が低下することなく掘進を継続することが
できるシールド掘進機用のカッタービットを提供するこ
とを目的とする。
The present invention has been made in view of the above points, and its purpose is to ensure that even if a carbide tip is missing, a spare carbide tip is located at the tip of the cutting edge of the base metal. An object of the present invention is to provide a cutter bit for a shield excavator that can continue digging without reducing excavation capacity.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的を達成するために本発明は、次のように構成さ
れる。すなわち、 請求項(1)のシールド掘進機用のカッタービットは、
台金に超硬チップを埋め込んだシールド掘進機用のカッ
タービットにおいて、複数の超硬チップを台金の少なく
とも切削方向の前端面に台金の先端部から基端部がわに
かけて多段式に並べて埋め込み、切削に伴う上段の超硬
チップの欠落により下段の予備の超硬チップか台金の先
端部に位置するように構成したことを特徴とするとする
ものである。
In order to achieve the above object, the present invention is configured as follows. That is, the cutter bit for a shield excavator according to claim (1) is
In a cutter bit for a shield excavator in which a carbide tip is embedded in the base metal, a plurality of carbide tips are arranged in a multi-stage manner at least on the front end surface of the base metal in the cutting direction from the tip to the base end of the base metal. The present invention is characterized in that when the upper carbide tip is missing due to embedding and cutting, the lower spare carbide tip is located at the tip of the base metal.

請求項(2)のシールド掘進機用のカッタービットは、
台金に超硬チップを埋め込んだシールド掘進機用のカッ
タービットにおいて、複数の超硬チップを台金の切削方
向の前端面に台金の先端部から基端部がわにかけて多段
式に並べて埋め込み、これら各超硬チップにそれぞれ対
応する複数の超硬チップを台金の切削方向の後端面に多
段式に並べて埋め込むとともに、前端がわの超硬チップ
とこれに対応する後端がわの超硬チップの先端同士を結
ぶ線が台金の先端面と平行となるように構成し、切削に
伴う上段の前端がわの超硬チップとこれに対応する上段
の後端がわの超硬チップの欠落により下段の予備の前端
がわの超硬チップとこれに対応する下段の後端がわの超
硬チップが台金の先端部にそれぞれ位置するように構成
したことを特徴とするものである。
The cutter bit for a shield excavator according to claim (2) includes:
In a cutter bit for a shield excavator that has carbide tips embedded in the base metal, multiple carbide tips are embedded in a multi-stage manner on the front end surface of the base metal in the cutting direction from the tip to the base end of the base metal. A plurality of carbide tips corresponding to each of these carbide tips are embedded in a multi-stage manner on the rear end surface of the base metal in the cutting direction, and a carbide tip on the front end and a corresponding carbide tip on the rear end are embedded in a multi-stage manner. The line connecting the tips of the hard tips is parallel to the tip surface of the base metal, and the carbide tip on the front end of the upper tier and the corresponding carbide tip on the rear end of the upper tier as cutting occurs. Due to the omission of the carbide tip at the front end of the lower tier spare and the corresponding carbide tip at the rear end of the lower tier, the carbide tip is located at the tip of the base metal. be.

〔作用〕[Effect]

請求項(1)のシールド掘進機用のカッタービットによ
れば、複数の超硬チップを台金の少なくとも切削方向の
前端面に台金の先端部から基端部がわにかけて多段式に
並べて埋め込み、切削に伴う上段の超硬チップの欠落に
より下段の予備の超硬チップが台金の先端部に位置する
ように構成したので、超硬チップが欠落しても予備の超
硬チップによって切削を継続することができ、しかも、
上段の超硬チップが欠落し台金の先端部が摩耗すれば、
直ぐ下の予備の超硬チップが台金の切削面の先端に位置
することとなり、超硬チップの欠落前とは変わらない掘
削能力を発揮することができる。
According to the cutter bit for a shield excavator according to claim (1), a plurality of carbide tips are embedded in at least the front end surface of the base metal in the cutting direction in a multistage manner from the tip end to the base end of the base metal. In case the upper carbide tip is missing during cutting, the spare carbide tip in the lower tier is located at the tip of the base metal, so even if the carbide tip is missing, cutting can be continued with the spare carbide tip. can be continued, and
If the upper carbide tip is missing and the tip of the base metal is worn out,
The spare carbide tip immediately below is positioned at the tip of the cutting surface of the base metal, and the same digging ability as before the carbide tip was lost can be achieved.

請求項(2)のシールド掘進機用のカッタービットによ
れば、超硬チップを台金の切削方向の前端面のみならず
後端面にも埋め込んだので、台金の後端がわの摩耗を抑
えつつ切削することかできる。
According to the cutter bit for a shield excavator according to claim (2), since the carbide tip is embedded not only in the front end surface of the base metal in the cutting direction but also on the rear end surface, wear on the rear end of the base metal is prevented. It is possible to cut while holding down.

また、前端がわの超硬チップとこれに対応する後端がわ
の超硬チップの先端同士を結ぶ線を台金の先端面と平行
となるように構成し、切削に伴う上段の前端がわの超硬
チップとこれに対応する上段の後端がわの超硬チップの
欠落により下段の予備の前端がわの超硬チップとこれに
対応する下段の後端がわの超硬チップか台金の先端部に
それぞれ位置するように構成したので、上段の前後両端
の超硬チップの欠落しても、下段の予備の後端がわ超硬
チップによって台金の後端がわの摩耗を抑えつつ、下段
の予備の前端がわ超硬チップによって切削を継続するこ
とができる。
In addition, the line connecting the tips of the carbide tip on the front end and the corresponding tip of the carbide tip on the rear end is configured to be parallel to the tip surface of the base metal, so that the front end of the upper stage during cutting Due to the missing carbide tip at the rear end of the upper row and the corresponding carbide tip at the rear end of the lower row, the carbide tip at the spare front end of the lower row and the corresponding carbide chip at the rear end of the lower row are missing. Since the configuration is such that they are located at the tips of the base metal, even if the carbide tips on both the front and rear ends of the upper stage are missing, the spare rear end carbide chips on the lower stage will prevent wear on the rear end of the base metal. It is possible to continue cutting with the carbide tip along the lower front end while suppressing the amount of damage.

〔実施例〕〔Example〕

以下、本発明を図示の実施例に基づいて説明する。 Hereinafter, the present invention will be explained based on illustrated embodiments.

第1図〜第3図に示すようにシールド掘進機Aの先部に
装着される切削体Bは、モータ等の駆動手段Cにて回動
する駆動軸りの先端部にスリット孔E1を有するカッタ
ー板Eを固着し、このカッター板Eに複数のカッタービ
ット1を取着して構成され、掘削土砂はスクリュウ式の
排土装置Fにて排出するようになっている。
As shown in Figures 1 to 3, the cutting body B attached to the tip of the shield tunneling machine A has a slit hole E1 at the tip of a drive shaft rotated by a drive means C such as a motor. It is constructed by fixing a cutter plate E and attaching a plurality of cutter bits 1 to the cutter plate E, and excavated earth and sand is discharged by a screw-type earth discharge device F.

カッタービットlは、第1図に示すように超硬材料から
なる超硬チップ3を台金2の切削方向イ(同図(b)に
示す)の前端面に複数個埋め込むとともにこれら超硬チ
ップ3を台金2の先端部から基端部がわにかけて多段式
に並べて構成されている。さらに、台金2の基端部には
固定ピン挿通孔2aを有する固定部が形成され、台金2
の先端面にはすくい面が形成されており、この逃げ角θ
1は15°程度としている。また、台金2の切削方向イ
の前端面は前向きに傾斜して形成されており、すくい角
θ2は例えば15°程度としている。
As shown in FIG. 1, the cutter bit l has a plurality of carbide tips 3 made of a carbide material embedded in the front end surface of the base metal 2 in the cutting direction A (shown in FIG. 1(b)), and these carbide tips 3. 3 are arranged in multiple stages from the distal end to the base end of the base metal 2. Furthermore, a fixing part having a fixing pin insertion hole 2a is formed at the base end of the base metal 2, and the base metal 2
A rake face is formed on the tip surface of the , and this relief angle θ
1 is approximately 15°. Further, the front end surface of the base metal 2 in the cutting direction A is formed to be inclined forward, and the rake angle θ2 is, for example, about 15°.

また、台金2の切削方向イの後端面にも、前端面と同様
に超硬チップ3Aを台金2の先端部から基端部がわにか
けて多段式に並べて埋め込まれている。前端がわの超硬
チップ3とこれに対応する後端がわの超硬チップ3Aの
各先端部を結ぶ線(第1図(b)において−点鎖線で示
す)を台金2の先端面と平行となるように構成し、各超
硬チップ3.3Aは差歯式に埋め込まれており、差歯角
度θ3は45°程度としている。
Also, on the rear end face of the base metal 2 in the cutting direction, similar to the front end face, carbide tips 3A are embedded in a multi-stage arrangement from the tip to the base end of the base metal 2. A line connecting the tips of the carbide tip 3 on the front end and the corresponding tip of the carbide tip 3A on the rear end (indicated by a dashed line in FIG. 1(b)) is connected to the tip surface of the base metal 2. Each carbide tip 3.3A is embedded in a toothed manner, and the toothed tooth angle θ3 is approximately 45°.

以上のようにして構成されるカッタービットlを有する
シールド掘進機は、駆動軸りの回動により地山を掘削し
、切削土砂を排土装置Fにより排出しながら推進ジヤツ
キGで掘進するものである。
The shield excavator having the cutter bit L configured as described above excavates the ground by rotating the drive shaft, and excavates the excavation with the propulsion jack G while discharging the cut earth and sand with the earth removal device F. be.

そして、掘削中に、超硬チップ3が礫層に当たって超硬
チップ3,3Aが欠落し、台金2の先端面が第1図(b
)中の一点鎖線で示す位置まで摩耗すると、下段の超硬
チップ3,3Aが台金2の先端部に表れ、しかも下段の
超硬チップ3,3Aが表れたときのカッタービットの先
端部の形状は、上段超硬チップ3,3Aの欠落前と全く
同じ形状となって逃げ角e1を所定角度に保持すること
ができる。したがって、台金2の後端がわの摩耗を抑え
つつ、上段の超硬チップ3,3Aの欠落前とは変わらな
い掘削能力で掘進を継続することができるものである。
Then, during excavation, the carbide tips 3 hit the gravel layer, causing the carbide tips 3 and 3A to break off, and the tip surface of the base metal 2 to be damaged as shown in Fig. 1 (b).
), the lower carbide tips 3, 3A appear at the tip of the base metal 2, and the tip of the cutter bit when the lower carbide tips 3, 3A appear. The shape is exactly the same as before the upper carbide tips 3, 3A were removed, and the relief angle e1 can be maintained at a predetermined angle. Therefore, while suppressing wear on the rear end of the base metal 2, it is possible to continue digging with the same excavation ability as before the upper cemented carbide tips 3, 3A were missing.

第4図乃至第8図は本発明の他の実施例を示している。4 to 8 show other embodiments of the invention.

第4図は、超硬チップ3を台金2の切削がわ端面の他に
、台金2の先端面にも超硬チップ3Bを多段式に埋め込
み、前端がわの超硬チップ3とこれに対応する超硬チッ
プ3Bの各先端部を結ぶ線(第4図(b)において−点
鎖線で示す)を台金2の先端面と平行とし、逃げ角θ1
、すくい角θ2および差歯角度θ3は第1実施例のもの
と同じとなるように構成されている。
Fig. 4 shows that in addition to the end surface of the cutting side of the base metal 2, the carbide tip 3B is embedded in the tip surface of the base metal 2 in a multi-stage manner, and the carbide tip 3B on the front end side and this A line connecting the respective tips of the carbide tip 3B corresponding to
, the rake angle θ2 and the differential tooth angle θ3 are configured to be the same as those of the first embodiment.

したがって、超硬チップ3,3Bが欠落し、台金2の先
端面が第4図(b)中の一点鎖線で示す位置まで摩耗す
ると、下段の超硬チップ3,3Aか台金2の先端部に表
れ、しかも、下段の超硬チップ3,3Bが表れたときの
カッタービットの先端部の形状は、上段超硬チップ3,
3Aの欠落前と全く同じ形状となって逃げ角θlを所定
角度に保持することができ、よって台金2の先端面の摩
耗を抑えつつ、上段の超硬チップ3,3Bの欠落前とは
変わらない掘削能力で掘進を継続することができるもの
である。
Therefore, if the carbide tips 3, 3B are missing and the tip end surface of the base metal 2 is worn to the position shown by the dashed line in FIG. Moreover, the shape of the tip of the cutter bit when the lower carbide tips 3 and 3B are exposed is the upper carbide tips 3 and 3B.
The shape becomes exactly the same as before the chipping of the upper carbide tips 3 and 3B, and the relief angle θl can be maintained at a predetermined angle, thereby suppressing wear on the tip end surface of the base metal 2 and making it different from the shape before the chipping of the upper carbide tips 3 and 3B. It is possible to continue digging with the same digging capacity.

第5図は、超硬チップ3を台金2の切削端面に張刃式に
埋め込んで配設し、台金2の先端面にもボタン状(円柱
状)の超硬チップ3Cを多段式に埋め込んで構成される
カッタービット1を示しており、また、前端がわの超硬
チップ3とこれに対応する超硬チップ3Cの各先端部を
結ぶ線(第5図(b)において−点鎖線で示す)を台金
2の先端面と平行となるように構成されている。
Fig. 5 shows a carbide tip 3 embedded in the cutting end surface of the base metal 2 in a tension-like manner, and a button-shaped (cylindrical) carbide tip 3C also placed on the tip surface of the base metal 2 in a multistage manner. The cutter bit 1 is shown embedded, and the line connecting the tip of the carbide tip 3 near the front end and the corresponding tip of the carbide tip 3C (in Fig. 5(b) - dotted line) ) is configured to be parallel to the tip surface of the base metal 2.

かかる構成において、張刃式に埋め込まれる超硬チップ
3は、差歯式に埋め込まれる超硬チップ3よりも台金2
−\の付着強度が強く、台金2から欠落しにくくなって
いる。また、台金2の先端面の摩耗は超硬チップ3Cの
存在により防止される。
In such a configuration, the carbide tip 3 embedded in the tension type is closer to the base metal 2 than the carbide tip 3 embedded in the tooth type.
-\ has strong adhesion strength and is difficult to fall off from the base metal 2. Furthermore, wear of the tip end surface of the base metal 2 is prevented by the presence of the carbide tip 3C.

また、上段の超硬チップ3,3Bか欠落し、台金2の先
端面が第5図(b)中の一点鎖線で示す位置まで摩耗す
ると、下段の超硬チップ3,3Aか台金2の先端部に表
れ、しかも、下段の超硬チップ3,3Cが表れたときの
カッタービットの先端部の形状は、上段超硬チップ3,
3Aの欠落前と全く同じ形状となって逃げ角θ1を所定
角度に保持することができ、よって台金2の先端面の摩
耗を抑えつつ、上段の超硬チップ3,3Bの欠落前とは
変わらない掘削能力で掘進を継続することができるもの
である。
In addition, if the upper carbide tips 3, 3B are missing and the tip surface of the base metal 2 is worn to the position shown by the dashed line in FIG. 5(b), the lower carbide tips 3, 3A or the base metal 2 The shape of the tip of the cutter bit when the lower carbide tips 3 and 3C are exposed is the upper carbide tips 3 and 3C.
The shape becomes exactly the same as before the chipping of the upper carbide tips 3 and 3B, and the relief angle θ1 can be maintained at a predetermined angle, thereby suppressing wear on the tip end surface of the base metal 2 and making it completely different from the shape before the chipping of the upper carbide tips 3 and 3B. It is possible to continue digging with the same digging capacity.

第6図は、超硬チップ3を張力式に埋め込むととともに
、超硬チップ3Dをくし刃のようにして多数列設して超
硬チップ3の背部に直に埋め込み、さらに台金2の先端
面の中間部にボタン状の超硬チップ3Cを多段式に埋め
込んで構成されるカッタービット1を示している。
FIG. 6 shows that the carbide tip 3 is embedded in a tension manner, and a large number of carbide tips 3D are arranged in rows like comb blades to be directly embedded in the back of the carbide tip 3, and then the tip of the base metal 2 is inserted. A cutter bit 1 is shown in which button-shaped carbide tips 3C are embedded in multiple stages in the middle of the surface.

このようにして構成されるカッタービット1は、第5図
に示す実施例のカッタービット1よりも超硬チップ3の
背面部の台金2の摩耗に対する防御機能が一層向上する
ものである。
The cutter bit 1 constructed in this manner has a further improved function of protecting the base metal 2 on the back surface of the carbide tip 3 from wear than the cutter bit 1 of the embodiment shown in FIG.

第7図は、台金2の4つの各角部に超硬チップ3.3A
を差力式に埋め込むとともに、台金2の前面の中間部及
び後面の中間部にも角柱状の超硬チップ31.31Aを
多段式に埋め込み、さらに台金2の先端面にボタン状の
超硬チップ3Cを多段式に埋め込んで構成されるカッタ
ービット1を示している。
Figure 7 shows carbide tips 3.3A at each of the four corners of the base metal 2.
At the same time, a prismatic carbide tip 31.31A is embedded in the middle part of the front surface and the middle part of the rear surface of the base metal 2 in a multi-stage manner, and a button-shaped carbide tip is embedded in the tip surface of the base metal 2. A cutter bit 1 is shown in which hard tips 3C are embedded in multiple stages.

このようにして構成されるカッタービット1によれば、
台金2の摩耗に対する台金2の全周面の防御が可能とな
り、また超硬チップ3の耐摩耗性と台金2への付着強度
を上述の実施例よりも向上させることができるものであ
る。
According to the cutter bit 1 configured in this way,
It is possible to protect the entire circumferential surface of the base metal 2 from wear, and the wear resistance of the carbide tip 3 and the adhesion strength to the base metal 2 can be improved compared to the above-mentioned embodiments. be.

第8図は、超硬チップ3をくし刃のようにして多数列設
して台金2の前端面に埋め込み、さらに台金2の前後面
の中間部にボタン状の超硬チップ3Cを多段式に埋め込
んで構成されるカッタービット1を示している。
In FIG. 8, a large number of carbide tips 3 are arranged in rows like comb blades and embedded in the front end surface of the base metal 2, and button-shaped carbide tips 3C are arranged in multiple stages in the middle part of the front and rear surfaces of the base metal 2. The cutter bit 1 is shown embedded in the formula.

このようにして構成されるカッタービット1は、台金2
の先端面の摩耗を抑えることができる。
The cutter bit 1 constructed in this way has a base metal 2.
Wear on the tip surface can be suppressed.

なお、第5図乃至第8図に示す他の実施例の逃げ角θ1
及びすくい角θ2の大きさは第1実施例のものと同じと
なるように構成されている。
Note that the relief angle θ1 of other embodiments shown in FIGS. 5 to 8
The size of the rake angle θ2 is the same as that of the first embodiment.

〔発明の効果〕〔Effect of the invention〕

上記説明からも明らかなように請求項(1)のシールド
掘進機用のカッタービットによれば、上段の超硬チップ
が摩耗若しくは欠落し台金の先端部が摩耗すれば、直ぐ
下の予備の超硬チップが台金の切削面の先端に位置する
ので、超硬チップの欠落前とは変わらない掘削能力を発
揮することかできて円滑で安定した掘削作業かでき、1
つの工事区間をカッタービットの交換なしに掘削できる
という効果を奏する。
As is clear from the above description, according to the cutter bit for a shield excavator according to claim (1), if the upper carbide tip is worn out or missing, and the tip of the base metal is worn out, the spare part immediately below is removed. Since the carbide tip is located at the tip of the cutting surface of the base metal, it is possible to demonstrate the same digging ability as before the carbide tip was missing, allowing smooth and stable drilling work.
This has the effect that two construction sections can be excavated without changing the cutter bit.

請求項(2)のシールド掘進機用のカッタービットによ
れば、上段の前後両端の超硬チップの欠落しても下段の
予備の後端がわ超硬チップによって台金の後端がわの摩
耗を抑えつつ、下段の予備の前端かわ超硬チップによっ
て切削を継続することができるので、掘削距離を伸ばす
ことができ、1つの工事区間か比較的長くてもをカッタ
ービットの交換なしに掘削できるという効果を奏する。
According to the cutter bit for a shield excavator according to claim (2), even if the carbide chips at both the front and rear ends of the upper stage are missing, the rear end of the base metal can be removed by the spare rear end carbide chips of the lower stage. Cutting can be continued with the lower front edge carbide tip while reducing wear, allowing for longer excavation distances and excavating even one construction section or relatively long sections without changing the cutter bit. It has the effect of being able to do it.

しかも、多段式に埋め込まれる前端がわの超硬チップと
これに対応する後端かわの超硬チップの各先端同士を結
ぶ線が台金の先端面と平行となるように構成されている
ので、上段の超硬チップか欠落して下段の超硬チップが
表れたときのカッタービットの先端部の形状は、上段の
超硬チップの欠落前と全く同じ形状となって逃げ角を所
定角度に保持することができ、したがって、欠落前と同
じ切削能力を保持しつつ、シールド掘進機を掘進させる
ことができるという効果を奏する。
Moreover, the line connecting the tips of the carbide tips at the front end and the corresponding carbide tips at the rear end, which are embedded in multiple stages, is parallel to the tip surface of the base metal. , when the upper carbide tip is missing and the lower carbide tip is exposed, the shape of the tip of the cutter bit is exactly the same as before the upper carbide tip was missing, and the clearance angle is adjusted to a predetermined angle. Therefore, it is possible to make the shield tunneling machine dig while maintaining the same cutting ability as before the chipping.

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

第1図(a)(b)(c)は本発明のカッタービットの
一実施例を示す正面図、側面図及び平面図、第2図(a
)(b)はシールド掘進機の側断面図及び正面図、第3
図はカッター板の拡大断面図、第4図〜第8図の(a)
は本発明のカッタービットの他の実施例を示す正面図、
第4図〜第8図の(b)は本発明のカッタービットの他
の実施例を示す側面図、第4図〜第8図の(c)は本発
明のカッタービットの他の実施例を示す平面図、第9図
(a)(b)(c)は従来例のカッタービットの一実施
例を示す正面図、側面図及び平面図である。 (符号の説明) ■・・・カッタービット 2・・・台金 3・・・超硬チップ
FIGS. 1(a), (b), and (c) are a front view, a side view, and a plan view showing one embodiment of the cutter bit of the present invention, and FIG.
)(b) is a side sectional view and front view of the shield tunneling machine, 3rd
The figure is an enlarged cross-sectional view of the cutter plate, (a) of Figures 4 to 8.
is a front view showing another embodiment of the cutter bit of the present invention,
FIGS. 4 to 8 (b) are side views showing other embodiments of the cutter bit of the present invention, and FIGS. 4 to 8 (c) are side views showing other embodiments of the cutter bit of the present invention. FIGS. 9A, 9B, and 9C are a front view, a side view, and a plan view of an embodiment of a conventional cutter bit. (Explanation of symbols) ■...Cutter bit 2...Base metal 3...Carbide tip

Claims (2)

【特許請求の範囲】[Claims] (1)台金に超硬チップを埋め込んだシールド掘進機用
のカッタービットにおいて、複数の超硬チップを台金の
少なくとも切削方向の前端面に台金の先端部から基端部
がわにかけて多段式に並べて埋め込み、切削に伴う上段
の超硬チップの欠落により下段の予備の超硬チップが台
金の先端部に位置するように構成したことを特徴とする
シールド掘進機用のカッタービット。
(1) In a cutter bit for a shield excavator in which a carbide tip is embedded in the base metal, a plurality of carbide tips are placed in multiple stages at least on the front end face of the base metal in the cutting direction from the tip to the base end of the base metal. A cutter bit for a shield excavator, characterized in that the cutter bit is arranged in a manner that the carbide tips in the upper tier are missing due to cutting, and the spare carbide tips in the lower tier are positioned at the tip of the base metal.
(2)台金に超硬チップを埋め込んだシールド掘進機用
のカッタービットにおいて、複数の超硬チップを台金の
切削方向の前端面に台金の先端部から基端部がわにかけ
て多段式に並べて埋め込み、これら各超硬チップにそれ
ぞれ対応する複数の超硬チップを台金の切削方向の後端
面に多段式に並べて埋め込むとともに、前端がわの超硬
チップとこれに対応する後端がわの超硬チップの先端同
士を結ぶ線が台金の先端面と平行となるように構成し、
切削に伴う上段の前端がわの超硬チップとこれに対応す
る上段の後端がわの超硬チップの欠落により下段の予備
の前端がわの超硬チップとこれに対応する下段の後端が
わの超硬チップが台金の先端部にそれぞれ位置するよう
に構成したことを特徴とするシールド掘進機用のカッタ
ービット。
(2) In a cutter bit for a shield excavator with carbide tips embedded in the base metal, multiple carbide tips are placed on the front end face of the base metal in the cutting direction in a multi-stage manner from the tip to the base end of the base metal. A plurality of carbide tips corresponding to each of these carbide tips are lined up and embedded in a multi-stage manner on the rear end surface of the base metal in the cutting direction, and the carbide tips along the front end and the corresponding rear end are embedded. The line connecting the tips of the carbide tips is parallel to the tip surface of the base metal,
Due to cutting, the carbide tip on the front end of the upper stage and the corresponding carbide tip on the rear end of the upper stage were missing, so the spare carbide tip on the front end of the lower stage and the corresponding rear end of the lower stage were lost. A cutter bit for a shield excavator, characterized in that the carbide tips are located at the tips of the base metal.
JP2289964A 1990-10-26 1990-10-26 Cutter bit for shield machine Expired - Lifetime JPH07119554B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2289964A JPH07119554B2 (en) 1990-10-26 1990-10-26 Cutter bit for shield machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2289964A JPH07119554B2 (en) 1990-10-26 1990-10-26 Cutter bit for shield machine

Publications (2)

Publication Number Publication Date
JPH04166596A true JPH04166596A (en) 1992-06-12
JPH07119554B2 JPH07119554B2 (en) 1995-12-20

Family

ID=17750011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2289964A Expired - Lifetime JPH07119554B2 (en) 1990-10-26 1990-10-26 Cutter bit for shield machine

Country Status (1)

Country Link
JP (1) JPH07119554B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002242592A (en) * 2001-02-20 2002-08-28 Toshiba Tungaloy Co Ltd Bit for shield machine
JP2014141846A (en) * 2013-01-25 2014-08-07 Taisei Corp Cutter bit and method of manufacturing the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62143797U (en) * 1986-03-04 1987-09-10

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62143797U (en) * 1986-03-04 1987-09-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002242592A (en) * 2001-02-20 2002-08-28 Toshiba Tungaloy Co Ltd Bit for shield machine
JP2014141846A (en) * 2013-01-25 2014-08-07 Taisei Corp Cutter bit and method of manufacturing the same

Also Published As

Publication number Publication date
JPH07119554B2 (en) 1995-12-20

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