JPS59173483A - Method of detecting abrasion of cutter bit - Google Patents
Method of detecting abrasion of cutter bitInfo
- Publication number
- JPS59173483A JPS59173483A JP4860183A JP4860183A JPS59173483A JP S59173483 A JPS59173483 A JP S59173483A JP 4860183 A JP4860183 A JP 4860183A JP 4860183 A JP4860183 A JP 4860183A JP S59173483 A JPS59173483 A JP S59173483A
- Authority
- JP
- Japan
- Prior art keywords
- cutter
- pit
- cutter bit
- wear
- pair
- 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
Links
Landscapes
- Earth Drilling (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は掘削機にお（プるカッタピットの摩耗検出方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting wear of a pull cutter pit in an excavator.
通常、掘削機例えばシールド掘進機においては、カッタ
ピットの摩耗を特別に検知する手段が設けられておらず
、従来、掘削能率が低下することによってその摩耗痕が
判断されていたが、正確ではなく例えば判断が遅れると
カッタピッ１〜先端の超硬合金が脱落してしまい、同一
軌跡上の他のカッタピットを損傷してしまうという欠点
があり、またカッタピットの摩耗がうまく判ったとして
も、直ちにカッタピットを取替える必要があり、例えば
地盤が悪い場合などは、地盤改良を必要とし、従って掘
削作業が長く中断して掘削効率が悪くなるという欠点が
あった。Normally, excavators such as shield excavators are not equipped with a special means to detect the wear of the cutter pit, and conventionally, the wear marks were determined by the decrease in excavation efficiency, but this was not accurate. For example, if the judgment is delayed, the cemented carbide from cutter pit 1 to the tip may fall off, damaging other cutter pits on the same trajectory.Also, even if the wear of the cutter pit is successfully detected, It is necessary to replace the cutter pit, and if the ground is poor, for example, ground improvement is required, which has the disadvantage that excavation work is interrupted for a long time, reducing excavation efficiency.
そ°こで、本発明は上記欠点を解消し１ｑるカッタピッ
トの摩耗検出方法を提供することを目的とする。Therefore, an object of the present invention is to provide a cutter pit wear detection method that eliminates the above-mentioned drawbacks.
即ち、本発明はカッタピット内部に形成された密閉空間
内に一対の電極を配設しておき、カッタピットの摩耗に
よって上記密閉空間が外部と連通ずることにより上記一
対の電極を導通させることを特徴とするカッタピットの
摩耗検出方法で、かかる方法によると、カッタピットの
摩耗を正確に検出でき、従って従来のように先端超硬合
金の脱落を防止できるので、同一軌跡上の他のカッタピ
ットの損傷を防止でき、またあらかじめカッタピットの
摩耗度が判るため、地盤改良等の作業を準備しておくこ
とができるで、カッタピット取替作業時間の短縮化を図
ることができる。That is, the present invention arranges a pair of electrodes in a sealed space formed inside a cutter pit, and when the cutter pit wears out, the sealed space communicates with the outside, thereby making the pair of electrodes conductive. This method is characterized by a cutter pit wear detection method. According to this method, cutter pit wear can be accurately detected, and the cemented carbide tip can be prevented from falling off as in the conventional method, so that other cutter pits on the same trajectory can be prevented from falling off. Since damage to the cutter pit can be prevented, and since the degree of wear of the cutter pit can be known in advance, work such as ground improvement can be prepared in advance, and the time required for replacing the cutter pit can be shortened.
以゛下、本発明の一実施例を第１図及び第２図に基づき
説明する。１は例えばシールド掘進機で、そのシールド
本体２前部には表面にカッタピット３を有するカッタヘ
ッド４が軸受５，６を介して回転自在に支持されている
。なお、上記カッタヘッド４はその支持筒部４ａ後端に
取付しプられだリングギＡ７７及びこのリングギヤ７に
噛合うピニオン８を介して回転駆動装置９に連動連結さ
れている。そして、上記カッタビット３は、第２図に示
すように、その先端部に超硬合金３ａがろう付けされた
もので、またその内部には裏面から所定深さの穴１０が
穿設されると共に、この穴１０に内部に密閉空間１１を
有するカプセル状の密閉容器１２が挿入螺着されている
。そして、更に密閉容器１２の密閉空間１・１内には一
対の電極１３．１３ ＝が挿入されており、またこの一
対の電極１３．１３−はカッタヘッド４内の電気配線１
４を介して制ｍ盤１５に接続されている。なお、第１図
中、１６は回転端子、第２図中、１７はカッタヘッド４
の面板４ｂに形成された土砂取込用スリットである。従
って、掘削中にカッタビット３が第２図仮想線で示すよ
うに摩耗して密閉容器１２の一部が破損すると、密閉空
間１１内に地下水が入り、一対の電極１３．１３ ＝同
志が導通７る。一対の電極１３．１３−同志が導通ずる
と、制御盤１５上のインジケータランプが点灯して、カ
ッタビット３の摩耗が検出される。このように、カッタ
ビット３の摩耗が確実に検出できるので、早目に検出す
るようにしておけば、あらかじめカッタピット取替時に
必要な地盤改良作業の準備をすることができ、作業効率
が良（なる。なお、通常、カッタビット３はカッタヘッ
ド４に多数設けられており、上記密閉容器１２は、その
うち適当な位置例えば最外周位置のカッタビット３に設
けられる。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 1 denotes, for example, a shield excavator, in which a cutter head 4 having a cutter pit 3 on its surface is rotatably supported at the front of a shield body 2 via bearings 5 and 6. The cutter head 4 is attached to the rear end of the support tube 4a and is operatively connected to the rotational drive device 9 via a pulled ring gear A77 and a pinion 8 meshing with the ring gear 7. As shown in FIG. 2, the cutter bit 3 has a cemented carbide 3a brazed to its tip, and a hole 10 of a predetermined depth is drilled inside the cutter bit 3 from the back surface. At the same time, a capsule-shaped sealed container 12 having a sealed space 11 inside is inserted and screwed into this hole 10. Furthermore, a pair of electrodes 13.13 = are inserted into the closed space 1.1 of the closed container 12, and this pair of electrodes 13.13- is connected to the electrical wiring 1 in the cutter head 4.
4 to the control board 15. In addition, in FIG. 1, 16 is a rotary terminal, and in FIG. 2, 17 is a cutter head 4.
This is a slit for taking in earth and sand formed in the face plate 4b. Therefore, if the cutter bit 3 is worn during excavation as shown by the imaginary line in FIG. 2 and a part of the closed container 12 is damaged, groundwater will enter the closed space 11 and the pair of electrodes 13.13 will become conductive. 7ru. When the pair of electrodes 13 and 13 become conductive, an indicator lamp on the control panel 15 lights up, and wear of the cutter bit 3 is detected. In this way, the wear of the cutter bit 3 can be reliably detected, so if you detect it early, you can prepare for the ground improvement work required when replacing the cutter pit in advance, improving work efficiency. (Normally, a large number of cutter bits 3 are provided on the cutter head 4, and the sealed container 12 is provided at an appropriate position, for example, at the outermost position of the cutter bit 3.
ところで、上記実施例においては、カッタビット３に１
個の密閉容器１２を挿入するようにしたが、例えば第３
図に示すように、それぞれ異なる位置に異なる深さでも
って複数個の密閉容器１２を挿入すれば、摩耗状況を段
階的に検出することができ、また第４図及び第５図に示
すように、異なる位置に複数個の密閉容器１２を挿入す
れば、摩耗形態を把握することができる。また、上記実
施例においては、シールド掘進機におけるカッタビット
について説明したが、イ耽の掘削機におけるカッタビッ
ト（カッタティース）にも適用できることは言うまでも
ない。By the way, in the above embodiment, the cutter bit 3 has a
For example, the third airtight container 12 is inserted.
As shown in the figure, if a plurality of closed containers 12 are inserted at different positions and at different depths, the wear state can be detected step by step. By inserting a plurality of closed containers 12 at different positions, it is possible to grasp the wear pattern. Further, in the above embodiment, a cutter bit for a shield excavator has been described, but it goes without saying that the present invention can also be applied to a cutter bit (cutter teeth) for an ordinary excavator.
第１図□は本発明の一実施例の縦断面図、第２図は同要
部拡大断面図、第３図及び第４図は変形例を示す要部概
略側面図、第５図は第４図の正面図である。
１・・・シールド掘゛進機、２・・・シールド本体、３
・・・カッタビット、４・・・カッタヘッド、１０・・
・穴、１１・・・密閉空間、１２・・・密閉容器、１３
；１３′・・・電極、１４・・・電気配線、１５・・・
制御盤
代理人 森 本 義 弘Fig. 1 □ is a longitudinal sectional view of one embodiment of the present invention, Fig. 2 is an enlarged sectional view of the same main part, Figs. 3 and 4 are schematic side views of the main part showing a modification, and Fig. 5 is FIG. 4 is a front view of FIG. 1... Shield excavator, 2... Shield body, 3
...Cutter bit, 4...Cutter head, 10...
- Hole, 11... Sealed space, 12... Sealed container, 13
;13'...electrode, 14...electrical wiring, 15...
Control panel agent Yoshihiro Morimoto
Claims (1)
電極を配設しておき、カッタヒツトの摩耗によって上記
密閉空間が外部と連通ずることにより上記一対の電極を
導通させることを特徴とするカッタピットの摩耗検出方
法。1. A cutter characterized in that a pair of electrodes is arranged in a sealed space formed inside a cutter pit, and when the cutter hit wears, the sealed space communicates with the outside, thereby making the pair of electrodes electrically conductive. Pit wear detection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4860183A JPS59173483A (en) | 1983-03-22 | 1983-03-22 | Method of detecting abrasion of cutter bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4860183A JPS59173483A (en) | 1983-03-22 | 1983-03-22 | Method of detecting abrasion of cutter bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59173483A true JPS59173483A (en) | 1984-10-01 |
| JPS6227229B2 JPS6227229B2 (en) | 1987-06-12 |
Family
ID=12807924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4860183A Granted JPS59173483A (en) | 1983-03-22 | 1983-03-22 | Method of detecting abrasion of cutter bit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59173483A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54141472A (en) * | 1978-04-26 | 1979-11-02 | Fanuc Ltd | System for detecting tool abrasion |
| JPS5516256A (en) * | 1978-07-20 | 1980-02-04 | Matsushita Electric Ind Co Ltd | Body detector |
| JPS5720718U (en) * | 1980-07-10 | 1982-02-03 |
-
1983
- 1983-03-22 JP JP4860183A patent/JPS59173483A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54141472A (en) * | 1978-04-26 | 1979-11-02 | Fanuc Ltd | System for detecting tool abrasion |
| JPS5516256A (en) * | 1978-07-20 | 1980-02-04 | Matsushita Electric Ind Co Ltd | Body detector |
| JPS5720718U (en) * | 1980-07-10 | 1982-02-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6227229B2 (en) | 1987-06-12 |
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