JPH03250190A - Digging tool - Google Patents
Digging toolInfo
- Publication number
- JPH03250190A JPH03250190A JP2048234A JP4823490A JPH03250190A JP H03250190 A JPH03250190 A JP H03250190A JP 2048234 A JP2048234 A JP 2048234A JP 4823490 A JP4823490 A JP 4823490A JP H03250190 A JPH03250190 A JP H03250190A
- Authority
- JP
- Japan
- Prior art keywords
- block
- blocks
- radius
- excavation
- protruding
- 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.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 238000009412 basement excavation Methods 0.000 claims description 27
- 238000007796 conventional method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は、地盤、土砂等を掘削する掘削工具に係わり
、特に、工具寿命を向上させることができるものに関す
る。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an excavation tool for excavating the ground, earth, etc., and particularly relates to an excavation tool that can improve the life of the tool.
「従来の技術」
従来、地盤、土砂等を掘削する掘削工具の一例として、
特開昭６３−１１７８９号公報に記載のものが知られて
いる。"Conventional technology" Conventionally, as an example of excavation tools for excavating the ground, earth, etc.
The one described in JP-A-63-11789 is known.
この掘削工具は、第３図ないし第５図に示すように、ハ
ンマ（図示せず）の衝撃力およびハンマシリンダ１の回
転力を受けるデバイス２の底面に、該デバイス２の中心
に対して点対称にそれぞれブロック軸３ａ、３ｂを軸回
りに回動自在にかつ抜は止めして嵌入し、それぞれのブ
ロック軸３ａ、３ｂの先端部に、上記デバイス２の径と
ばぼ同径の略半円形状をなしかつ先端面に多数のビット
４・・・が植設されたブロック５ ａ、 ５ ｂを、そ
れぞれの直状端面６ａ、６ｂを適宜な間隔をもって対向
させて設け、上記ブロック軸３ａ、３ｂの位置を、上記
デバイス２が掘削方向に回転した際に、上記両ブロック
５ ａ、 ５ ｂのそれぞれの一方の端部が共にデバイ
ス２の外周面より所定の掘削量分だけ突出し、かつその
際に両ブロック５ａ、５ｂの直状端面６ａ、６ｂが互い
に当接するように、デバイス２の中心から偏心させてな
るものである。As shown in FIGS. 3 to 5, this drilling tool has a point on the bottom surface of the device 2 that receives the impact force of a hammer (not shown) and the rotational force of the hammer cylinder 1, with respect to the center of the device 2. The block shafts 3a and 3b are fitted symmetrically so that they can rotate freely around the shafts and cannot be removed, and a half-shaft approximately the same diameter as the device 2 is attached to the tip of each block shaft 3a and 3b. Blocks 5a, 5b each having a circular shape and having a large number of bits 4 implanted in their tip surfaces are provided with their respective straight end surfaces 6a, 6b facing each other at an appropriate interval, and the block shaft 3a is , 3b such that when the device 2 rotates in the excavation direction, one end of each of the blocks 5a and 5b protrudes from the outer peripheral surface of the device 2 by a predetermined amount of excavation, and At that time, the straight end faces 6a, 6b of both blocks 5a, 5b are made eccentric from the center of the device 2 so that they come into contact with each other.
そして、上記のような掘削工具では、デバイス２をハン
マンリンダ１により掘削方向に回転させると、ブロック
５ ａ、 ５ ｂがブロック軸３ａ、３ｂを軸として回
動し、ブロック５ ａ、 ５ ｂの直状端面６ａ。In the excavation tool as described above, when the device 2 is rotated in the excavation direction by the hammer cylinder 1, the blocks 5a, 5b rotate about the block shafts 3a, 3b, and the blocks 5a, 5b rotate. straight end surface 6a.
６ｂの一端部がデバイス２の外周面より所定量だけ突出
するとともに、直状端面６ａ、６ｂの一部が互いに当接
してブロック５ａ、５ｂの回動が停止し、この状態でブ
ロック５ ａ、 ５ ｂがデバイス２の回転力を受けて
、ビット４ ・により地中を掘削し、さらに、ハンマの
衝撃力により地中を前進する。One end of the block 6b protrudes from the outer peripheral surface of the device 2 by a predetermined amount, and a portion of the straight end surfaces 6a, 6b abuts each other to stop the rotation of the blocks 5a, 5b. In this state, the blocks 5a, 5b receives the rotational force of the device 2, excavates underground with the bit 4, and further advances underground with the impact force of the hammer.
「発明が解決しようとする課題」
ところで、上記掘削工具においては、掘削する際に、ブ
ロック５ ａ、５ ｂのそれぞれ一方の端部が共にデバ
イス２の外周面より所定の掘削量分だけ突出するが、こ
の突出した部分すなわち所定の穿孔径を得る部分の仕事
量が最も多くなる。したがって、この部分に植設された
ビット４・・の摩耗量が大きく、突出しない部分に植設
されたビット４・・・が摩耗する前に、突出する部分に
植設されたビット４・・・が摩耗してしまい、この結果
、掘削工具としての寿命が短いという欠点があった。"Problem to be Solved by the Invention" By the way, in the above excavation tool, when excavating, one end of each of the blocks 5 a and 5 b protrudes from the outer peripheral surface of the device 2 by a predetermined amount of excavation. However, the amount of work is greatest in this protruding portion, that is, in the portion where a predetermined hole diameter is obtained. Therefore, the amount of wear of the bit 4 installed in this part is large, and before the bit 4 installed in the non-protruding part wears out, the bit 4 installed in the protruding part...・It wears out, and as a result, it has the disadvantage of shortening its lifespan as an excavation tool.
「発明の目的」
この発明は、上記事情に鑑みてなされたものであり、工
具寿命を向上させることができる掘削工具を提供するこ
とを目的としている。"Object of the Invention" The present invention has been made in view of the above circumstances, and an object thereof is to provide an excavation tool that can improve the tool life.
［課題を解決するための手段−１
上記目的を達成するために、この発明の掘削工具は、略
半円形状のブロックの外周を異なる半径の円弧で形成す
るとともに、上記デバイスが掘削方向に回転した際に、
このデバイスの外周面より突出する側のブロックの外周
の半径を突出しない側のブロックの外周の半径より大き
く設定したものである。[Means for Solving the Problems-1] In order to achieve the above object, the excavation tool of the present invention has a substantially semicircular block whose outer periphery is formed by arcs with different radii, and the device rotates in the excavation direction. When you do,
The radius of the outer periphery of the block on the side that protrudes from the outer peripheral surface of this device is set larger than the radius of the outer periphery of the block on the side that does not protrude.
「作用 」
この発明の掘削工具にあっては、デバイスが掘削方向に
回転した際に、このデバイスの外周面より突出するブロ
ックの部分の半径が突出しない部分の半径より大きいの
で、この部分に多数のビットを植設することができ、よ
−）で、ブロックの突出する部分、すなわち所定の穿孔
径を得る部分の仕事量が多くても、突出しない部分に植
設されたビットが摩耗する前に、突出している部分に植
設されたビットが摩耗してしまのを防止することができ
、よって掘削工具としての寿命を従来に比べ向上させる
ことができる。"Function" In the excavation tool of the present invention, when the device rotates in the excavation direction, the radius of the portion of the block that protrudes from the outer circumferential surface of the device is larger than the radius of the portion that does not protrude. Even if the amount of work is large in the protruding part of the block, i.e., the part for obtaining a predetermined hole diameter, the bit implanted in the non-protruding part will wear out. In addition, the bit installed in the protruding portion can be prevented from being worn out and striped, and the life of the excavation tool can therefore be extended compared to the conventional one.
「実施例」
第１図および第２図は、この発明の掘削工具の一実施例
を示す。なお、これらの図に示す掘削工具が第３図ない
し第５図に示す掘削工具と異なる点はブロックの形状な
ので、この部分についてのみ説明し、他の構成について
は図示とその説明を省略する。"Embodiment" FIGS. 1 and 2 show an embodiment of the excavation tool of the present invention. Note that the excavating tool shown in these figures differs from the excavating tool shown in FIGS. 3 to 5 in the shape of the block, so only this part will be explained, and illustration and explanation of other structures will be omitted.
これらの図において符号１０ａ、１０ｂは一対のブロッ
クを示す。これらブロックＩＯａ、ＩＯｂはそれぞれ底
面規格半円形状をなすものであり、その外周は異なる半
径の円弧で形成されている。In these figures, numerals 10a and 10b indicate a pair of blocks. Each of these blocks IOa and IOb has a standard semicircular bottom surface, and its outer periphery is formed by circular arcs with different radii.
すなわち、ブロック１０ａ、ＩＯｂのそれぞれの外周は
、２つの円弧ＳいＳ、とこれら円弧ＳＳ、を滑らかに結
ぶ曲線Ｓ３とで構成されている。That is, the outer periphery of each of the blocks 10a and IOb is composed of two circular arcs S and a curve S3 that smoothly connects these circular arcs SS.
円弧Ｓ１、Ｓ、は、点Ｏを中心とする異なる半径Ｒ７、
Ｒ７の円弧であり、Ｒ１＞Ｒ２に設定されている。Circular arcs S1, S, have different radii R7 centered at point O,
It is an arc of R7, and R1>R2 is set.
また、上記円弧ＳＩは、デバイス２が掘削方向に回転し
た際に、このデバイスの外周面より突出する側に位置し
ており、円弧Ｓ、は突出しない側に位置している。Further, the circular arc SI is located on the side that projects from the outer peripheral surface of the device 2 when the device 2 rotates in the excavation direction, and the circular arc S is located on the side that does not project.
上記ブロック１０ａ、ＩＯｂの先端面には多数のビット
４・・・が植設されているが、ブロックＩＯａ。A large number of bits 4... are implanted in the tip surfaces of the blocks 10a and IOb, and the block IOa.
１０ｂの突出する側の部分の外周を構成する半径Ｒ１が
、突出しない側の部分の外周を構成するＲ７より大きい
ので、突出する側の部分に多数のビット４ を植設正ろ
ごとがて恣ろ。Since the radius R1 constituting the outer periphery of the protruding side portion of 10b is larger than the radius R7 constituting the outer periphery of the non-protruding side portion, a large number of bits 4 are implanted in the protruding side portion at random. reactor.
したが−）で、デバイス２かｎｌ；削方向に回転した際
に、ブ〔１ツクＩＯａの突出−４′ろ部分の仕事…か多
くて乙、この部分には多数のピッ］・・１ が植設され
ているので、突出しない＋１＋分に植設されたピッ１−
４ か摩耗−４−ろ前に、突出している部分に植設さ
れたヒツト４ か摩耗してしまうのを防止することか
てさ、よ−・て掘削工具としての寿命を従来に比へ向−
［、さ０ろことがてきろ。However, when the device 2 or nl was rotated in the cutting direction, the work of the protruding part of the block IOa...at most, there were many pins in this part]...1 is planted, so the pin 1- planted at +1+ that does not protrude
4. Abrasion - 4. It is important to prevent the holes planted in the protruding parts from being worn out, thus increasing the lifespan of the excavation tool compared to conventional methods. −
[, Come on, let's go.
］発明の効果 １
以１−説明しまたように、この発明の化１削工具によれ
ば、略Ｍ’−円形状のブロックの外周を５間なる半径の
円弧で彩成するとともに、−１−記デバイスか掘削方向
に回転した際に、このデバイスの外周面より突出４−る
側のブし！・ツクの外周のＦ、径を突出しない側のブロ
ックの外周の半径より大きく設定したので、突出する側
の部分に多数のビットを植設することかてさる。] Effects of the invention 1 As explained below, according to the chemical cutting tool of the present invention, the outer periphery of the approximately M'-circular block is colored with a circular arc with a radius of -1 - When the device is rotated in the excavation direction, the 4- side knob protrudes from the outer peripheral surface of the device! - Since the diameter of the outer periphery of the block is set larger than the radius of the outer periphery of the block on the side that does not protrude, it is possible to plant a large number of bits on the side that protrudes.
したか−、′ζ、デバイスが掘削方向に回転した際に、
ブ〔ｌツクの突出４−ろ部分、才なわも所定の穿孔径を
得る部分の仕事量か多くてし、この部分には多数のヒソ
）・か植設されているので、突出しなし）部分に植設さ
れたヒントが摩耗する前に、突出している部分に植設さ
れたビットが摩耗してしまうのを防止することができ、
よ−）で掘削−１，具と１゜ての寿命を従来に比べ向−
１ニさせることができる。Did you do that?,′ζ, when the device rotates in the digging direction,
The protruding 4-groove part of the block, the amount of work required to obtain a predetermined hole diameter is large, and there is no protrusion as there are many thongs planted in this part. This can prevent the bit planted in the protruding part from being worn out before the tip planted in the tip wears out.
Compared to the conventional method, the service life of the tool and tool has been improved by using
You can make it 1 d.
第１図および第２図はそれぞれこの発明の掘削工具の一
実施例の底面図、第３図ないし第５図は従来の掘削工具
の一例を示すものであり、第３図は断面図、第４図およ
び第５図はそれぞれ底面図である。
１・・・ハンマンリング、２・・ デバイス、３ ａ、
３ ｂ−−ブロック軸、４ ビット、１０ ａ、
Ｉ Ｏｂ−−ブ［１ツク。1 and 2 are bottom views of one embodiment of the excavation tool of the present invention, FIGS. 3 to 5 show examples of conventional excavation tools, and FIG. 3 is a cross-sectional view, and FIG. 4 and 5 are bottom views, respectively. 1... hammer ring, 2... device, 3 a,
3 b--block axis, 4 bits, 10 a,
I Ob--B [1 tsuk.
Claims (1)
デバイスの底面に、該デバイスの中心に対して点対称に
それぞれブロック軸を軸回りに回動自在に嵌入し、それ
ぞれのブロック軸の先端部に、上記デバイスの径をほぼ
同径の略半円形状をなしかつ先端面にビットが植設され
たブロックをそれぞれの直状端面を対向させて設け、上
記ブロック軸の位置を、上記デバイスが掘削方向に回転
した際に、上記両ブロックのそれぞれ一方の端部が共に
デバイスの外周面より所定の掘削量分だけ突出し、かつ
その際に両ブロックの直状端面が互いに当接するようデ
バイスの中心から偏心させてなる掘削工具において、 上記略半円形状のブロックの外周を異なる半径の円弧で
形成するとともに、上記デバイスが掘削方向に回転した
際に、このデバイスの外周面より突出する側のブロック
の外周の半径を突出しない側のブロックの外周の半径よ
り大きく設定したことを特徴とする掘削工具。[Scope of Claims] Each block is fitted into the bottom surface of a device that receives the impact force of the hammer and the rotational force of the hammer cylinder so as to be freely rotatable around a block axis, point symmetrical with respect to the center of the device. At the tip of the shaft, a block having a substantially semicircular shape with a diameter almost the same as that of the device and having a bit implanted in the tip surface is provided with each straight end surface facing each other, and the position of the block shaft is adjusted. , when the device rotates in the excavation direction, one end of each of the blocks protrudes from the outer peripheral surface of the device by a predetermined amount of excavation, and at this time, the straight end surfaces of the blocks abut each other. In an excavation tool that is eccentric from the center of the device, the outer periphery of the approximately semicircular block is formed by circular arcs with different radii, and when the device rotates in the excavation direction, the device protrudes from the outer peripheral surface of the device. An excavation tool characterized in that the radius of the outer periphery of the block on the side that protrudes is set larger than the radius of the outer periphery of the block on the side that does not protrude.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2048234A JPH03250190A (en) | 1990-02-28 | 1990-02-28 | Digging tool |
| CA002036602A CA2036602C (en) | 1990-02-28 | 1991-02-19 | Excavation tool |
| AU71288/91A AU629104B2 (en) | 1990-02-28 | 1991-02-21 | Excavation tool |
| US07/660,546 US5113954A (en) | 1990-02-28 | 1991-02-25 | Excavation tool |
| NO910732A NO300742B1 (en) | 1990-02-28 | 1991-02-25 | cutting tool |
| FI910955A FI91551C (en) | 1990-02-28 | 1991-02-27 | excavation |
| ES91103041T ES2062581T3 (en) | 1990-02-28 | 1991-02-28 | EXCAVATION TOOL. |
| EP91103041A EP0444682B1 (en) | 1990-02-28 | 1991-02-28 | Excavation tool |
| DE69103442T DE69103442T2 (en) | 1990-02-28 | 1991-02-28 | Excavation tool. |
| KR1019910003311A KR950012431B1 (en) | 1990-02-28 | 1991-02-28 | Excavation tool |
| HK48395A HK48395A (en) | 1990-02-28 | 1995-03-30 | Excavation tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2048234A JPH03250190A (en) | 1990-02-28 | 1990-02-28 | Digging tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03250190A true JPH03250190A (en) | 1991-11-07 |
Family
ID=12797754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2048234A Pending JPH03250190A (en) | 1990-02-28 | 1990-02-28 | Digging tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03250190A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5976391A (en) * | 1982-10-25 | 1984-05-01 | 株式会社利根ボ−リング | Hydraulic striking type bore enlarging and drilling apparatus |
-
1990
- 1990-02-28 JP JP2048234A patent/JPH03250190A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5976391A (en) * | 1982-10-25 | 1984-05-01 | 株式会社利根ボ−リング | Hydraulic striking type bore enlarging and drilling apparatus |
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