JP3911041B2 - Shield machine - Google Patents

Shield machine Download PDF

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Publication number
JP3911041B2
JP3911041B2 JP33826095A JP33826095A JP3911041B2 JP 3911041 B2 JP3911041 B2 JP 3911041B2 JP 33826095 A JP33826095 A JP 33826095A JP 33826095 A JP33826095 A JP 33826095A JP 3911041 B2 JP3911041 B2 JP 3911041B2
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Japan
Prior art keywords
cutter
outer cutter
rotary
shield machine
master unit
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JP33826095A
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JPH09158678A (en
Inventor
研一 金子
正憲 平地
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Taisei Corp
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Taisei Corp
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Description

【０００１】
【発明の属する分野】
本発明は立坑と横坑を連続して掘進できるシールド掘進機に関する。
【０００２】
【従来の技術】
この種のシールド掘進機としては、図１に示すように親機１０の内部に旋回可能に子機２０を収容し、子機２０の回転カッタ２１と環状を呈する外周カッタ１１の両カッタで親機１０の全断面を掘削しつつ立坑３０を構築する。親機１０が所定の深度に達したら、外周カッタ１１を回転カッタ２１から分離した後、回転カッタ２１と共に子機２０を９０度旋回させて、子機２０の回転カッタ２１を親機１０に設けた開口部１２から外部に向けて掘進して立坑３０と連通した横坑（図示せず）を構築するマシンが提案されている。また親機１０と子機２０は共に、シールドジャッキ、セグメントの組立てを行うエレクタ装置、削土をスラリー化して搬送する送泥手段を具備している。
【０００３】
前記のシールド掘進機において、礫地盤等の硬質地盤を掘削する場合、子機２０の回転カッタ２１にローラビットを設置することは容易である。これに対して、
外周カッタ１１はその掘削範囲が比較的広いため、カッタ前面より強い力を受けると外周カッタ１１の強度が不足する。このため外周カッタ１１にローラビットを設置して硬質地場を掘削することが困難である。
また単に外周カッタ１１に強度だけを付与するのであれば、外周カッタ１１の厚さを厚く設計すればよいが、これに伴い回転カッタ２１も厚く設計する必要があり、さらに回転軸２３の強度を上げる必要があり不経済である。このようなことから、外周カッタ１１や回転カッタ２１の厚さを増さずに、硬質地盤を推進できる改善案の提案が望まれている。
【０００４】
【発明が解決しようとする課題】
本発明は以上の点に鑑みて成されたもので、その目的とするところは、礫地盤等の硬質地盤に対して大きな推進力を与えて掘削できる、シールド掘進機を提供することにある。
【０００５】
【課題を解決するための手段】
本発明は、親機の内部に旋回可能に子機を収容し、子機の回転カッタの回転軸の回転で、回転カッタの周縁の外周カッタを回転し、回転カッタと外周カッタの両カッタで、親機の全断面を掘削して立坑を構築し、親機が所定の深度に達したら、回転カッタを外周カッタから分離した後、回転カッタとともに子機を９０度旋回させて、子機の回転カッタを、親機の側面に設けた開口部から外部に向けて掘進して立坑と連通した横坑を構築するシールド掘進機において、外周カッタの背面と親機の隔壁との間に支持部材を配設し、前記支持部材を介して外周カッタに作用する推進力を親機の隔壁で支持できるように構成したことを特徴とする、シールド掘進機である。
【０００６】
【発明の実施の形態１】
以下図面を参照しながら本発明の実施の形態について説明する。
＜イ＞シールド掘進機の概要
図２にシールド掘進機の一例を示す。基本的な構成は従来技術の項で説明した通りである。
親機１０と子機２０には夫々隔壁１３，２２が形成されていて、切羽とマシンとが画成されている。子機２０には隔壁２２を貫通して中空の回転軸２３が貫通し、回転軸２３の先端に回転掘削手段である回転カッタ２１が固着されている。子機２０内には回転軸２３を駆動するモータ２４が配設されている。回転カッタ２１は子機２０の前断面を掘削可能な径に設定され、その前面にはローラビット２５や公知の各種ビット２６が設けられている（図３参照）。また子機２０の隔壁２２の一部には、採取口が設けられ、回転軸２３を通じて切羽に送泥した泥水と共に削土を回収できるようになっている。
尚、子機２０のシールドジャッキを収縮操作することで、子機２０全体が親機１０の球体内部に引き込まれる構造になっている。
【０００７】
＜ロ＞外周カッタ
子機２０の回転カッタ２１の周縁には、回転掘削手段である環状の外周カッタ１１が一体に取り付けられている。外周カッタ１１の前面には、子機２０と同様に硬質地盤掘削用のローラビット１４が設けられている。
外周カッタ１１は子機２０の回転カッタ２１側に進退自在に設けた係止体と嵌合することにより、又は両カッタ１１，２１の対向面に軸方向に形成した凹凸の嵌合構造により、回転カッタ２１と共に回転する構造になっている。前者の嵌合構造の場合は、子機２０側の係止体の後退操作の後に回転カッタ２１を子機２０と共に後退させることで外周カッタ１１から分離でき、また後者の嵌合構造の場合は、子機２０を後退させることで外周カッタ１１から分離できる。
【０００８】
＜ハ＞外周カッタの支持手段
図４に外周カッタ１１の部分断面図を示す。
親機１０の隔壁１３に外周カッタ１１へ向けて複数の支持部材１５を取り付け、これらの支持部材１５によって外周カッタ１１の背面を支持できる構造になっている。本例では外周カッタ１１の背面に連続した環状の当板１６を設けると共に、この当板１６と対向する隔壁１３に設けた支持部材１５の端部に車輪１７を設けた構造について説明する。要は、外周カッタ１１の回転を阻害せずに、外周カッタ１に作用する推進力を複数の支持部材１５を介して親機１０の隔壁１３に伝達できる構造であれば良い。
【０００９】
＜ニ＞作用
回転カッタ２１と外周カッタ１１を回転させながらシールド機を掘進すると、外周カッタ１１は支持部材１５の単に設けた車輪１７に支持されながら回転する。 外周カッタ１１が受ける推進力は、外周カッタ１１の背面に当接する車輪１７及び車輪１７を支持する複数の支持部材１５で支持されることとなり、外周カッタ１１が強度不足になることがない。尚、外周カッタ１１が受ける推進力は最終的に隔壁１３で支持される。
また外周カッタ１１を支持する支持部材１５の設置数は、掘削径により適宜選択するものとするが、支持力が隔壁１３に均等に分散される本数であれば良い。
また本発明は外周カッタ１１の支持構造を特徴のひとつとするもので、これ以外の親機１０及び子機２０の構造については公知の各種の構造を適用できることは勿論である。
【００１０】
【発明の実施の形態２】
図５は外周カッタ１１側に車輪１７を設けた他の実施の形態を示す。本形態は、外周カッタ１１の背面に所定の間隔を隔てて複数組のブラケット１８が取り付けられ、これらの各ブラケット１８に車輪１７が取り付けられている。他方、親機１０の隔壁１３側に設けた支持部材１５の端部に環状のレール１９が配設されている。
【００１１】
【発明の実施の形態３】
図６は外周カッタ１１の背面側に環状のレール１９ａが設けられ、隔壁１３側の支持部材１５に車輪１７を設けた他の形態を示す。
【００１２】
【発明の実施の形態４】
図７は外周カッタ１１側に支持部材１５を設けた他の形態を示す。
本形態にあっては、外周カッタ１１の背面の複数箇所に車輪１７付きの支持部材１５が設けられ、これらの車輪１７が介して対向する隔壁１３上を直接或いは、隔壁１３に設けた環状の当板１６ａ上を走向できる構造になっている。
【００１３】
【発明の実施の形態５】
外周カッタ１１は１環体に限定されるものではなく、複数環体で構成しても良い。この場合、外周カッタ１１を構成する複数環体は、子機２０の回転カッタ２１の回転中心に対して同一円上に位置させる必要がある。
【００１４】
【発明の効果】
本発明は以上説明したようになるから次のような効果を得ることができる。
＜イ＞外周カッタと親機の隔壁との間に支持部材を設けるだけの簡単な構造で、外周カッタが受ける推進力を支持部材で効果的に支持できる。そのため、外周カッタに大きな推進力を与えて礫層等の硬質地盤を掘削することができる。
＜ロ＞ 外周カッタを強固に設計せずに補強でき、礫対策として有効なローラビットの採用が可能となる。
＜ハ＞ 支持部材と支持部材の摺動部に車輪を設けることで、外周カッタの回転抵抗を極めて小さくできる。
＜ニ＞ 子機を旋回するため回転カッタを外周カッタと離脱する際、外周カッタが支持部材を介して親機に保持されるので、カッタ間のがたつきをなくして円滑に分離作業を行える。
【図面の簡単な説明】
【図１】 本発明が前提とするシールド掘進機の全体図
【図２】 本発明の実施の形態１に係る一部を省略したシールド掘進機の全体図
【図３】 切羽側から見たシールド掘進機のカッタフェースの説明図
【図４】 外周カッタの部分拡大断面図
【図５】 外周カッタ側に車輪を設けた他の実施の形態を示す外周カッタの部分拡大断面図
【図６】 外周カッタ側にレールを設けた他の実施の形態を示す外周カッタの部分拡大断面図
【図７】 外周カッタ側に支持部材を設けた他の実施の形態を示す外周カッタの部分拡大断面図
【符号の説明】
１０ 親機
１１ 外周カッタ
１３ 隔壁
１５ 支持部材
１７ 車輪
１８ ブラケット
１９ レール
２０ 子機
２１ 回転カッタ
２３ 回転軸
２５ ローラビット
２６ ビット[0001]
[Field of the Invention]
The present invention relates to a shield machine capable of continuously excavating a vertical shaft and a horizontal shaft.
[0002]
[Prior art]
As this type of shield machine, as shown in FIG. 1, a slave unit 20 is accommodated inside the master unit 10 so as to be able to turn, and both a rotary cutter 21 of the slave unit 20 and an outer peripheral cutter 11 having an annular shape are used as master units. The shaft 30 is constructed while excavating the entire cross section of the machine 10. When the master unit 10 reaches a predetermined depth, the outer cutter 11 is separated from the rotary cutter 21, and then the slave unit 20 is turned 90 degrees together with the rotary cutter 21, so that the rotary cutter 21 of the slave unit 20 is provided in the master unit 10. A machine has been proposed for constructing a horizontal shaft (not shown) communicating with the vertical shaft 30 by excavating from the opening 12 to the outside. Each of the master unit 10 and the slave unit 20 includes a shield jack, an erector apparatus for assembling the segments, and a mud feeding means for slurrying and transporting the soil.
[0003]
In the shield machine, when a hard ground such as a gravel ground is excavated, it is easy to install a roller bit on the rotary cutter 21 of the slave unit 20. On the contrary,
Since the outer cutter 11 has a relatively wide excavation range, if the outer cutter 11 receives a stronger force than the front surface of the cutter, the outer cutter 11 has insufficient strength. For this reason, it is difficult to excavate a hard ground by installing a roller bit on the outer cutter 11.
Further, if only the strength is given to the outer cutter 11, the thickness of the outer cutter 11 may be designed to be thicker. However, the rotary cutter 21 needs to be designed to be thicker, and the strength of the rotating shaft 23 is further increased. It is uneconomical because it must be raised. For this reason, it is desired to propose an improvement plan that can promote hard ground without increasing the thickness of the outer cutter 11 and the rotary cutter 21.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and an object of the present invention is to provide a shield machine capable of excavating by applying a large driving force to hard ground such as gravel ground.
[0005]
[Means for Solving the Problems]
The present invention accommodates a slave unit in a rotatable manner inside the master unit, rotates the outer cutter around the periphery of the rotary cutter by rotating the rotary shaft of the rotary cutter of the slave unit, and uses both the rotary cutter and the outer cutter. After excavating the entire cross section of the master unit and building a shaft, when the master unit reaches a predetermined depth, the rotary cutter is separated from the outer cutter, and then the slave unit is turned 90 degrees together with the rotary cutter. Support member between the back of the outer cutter and the bulkhead of the master cutter in the shield excavator that constructs a horizontal shaft that communicates with the vertical shaft by digging the rotary cutter outward from the opening provided on the side of the master The shield machine is configured so that the propulsive force acting on the outer cutter can be supported by the partition wall of the master unit via the support member.
[0006]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings.
<A> Outline of shield machine FIG. 2 shows an example of a shield machine. The basic configuration is as described in the section of the prior art.
Bulkheads 13 and 22 are formed in the master unit 10 and the slave unit 20, respectively, and a face and a machine are defined. A hollow rotary shaft 23 penetrates the slave unit 20 through the partition wall 22, and a rotary cutter 21 as a rotary excavating means is fixed to the tip of the rotary shaft 23. A motor 24 that drives the rotary shaft 23 is disposed in the slave unit 20. Rotating cutter 21 is set in front cross section of the slave unit 20 to the excavation diameters, on its front surface and roller bits 25 and various known bit 26 is provided (see FIG. 3). In addition, a sampling port is provided in a part of the partition wall 22 of the slave unit 20 so that the soil can be collected together with the muddy water sent to the face through the rotating shaft 23.
In addition, it has the structure where the whole subunit | mobile_unit 20 is drawn in the inside of the spherical body of the main | base station 10 by shrink-operating the shield jack of the subunit | mobile_unit 20. FIG.
[0007]
<B> Peripheral Cutter An annular outer cutter 11 that is a rotary excavating means is integrally attached to the peripheral edge of the rotary cutter 21 of the slave unit 20. A roller bit 14 for excavating hard ground is provided on the front surface of the outer cutter 11 in the same manner as the slave unit 20.
The outer cutter 11 is fitted to a locking body provided on the rotary cutter 21 side of the handset 20 so as to be movable back and forth, or by an uneven fitting structure formed in the axial direction on the opposing surfaces of both cutters 11, 21. The structure is configured to rotate together with the rotary cutter 21. In the case of the former fitting structure, the rotary cutter 21 can be separated from the outer cutter 11 by retreating together with the slave unit 20 after the retracting operation of the locking body on the slave unit 20 side. The slave unit 20 can be separated from the outer cutter 11 by retreating.
[0008]
<C> Peripheral Cutter Support Means FIG. 4 is a partial sectional view of the outer cutter 11.
A plurality of support members 15 are attached to the partition wall 13 of the base unit 10 toward the outer cutter 11, and the back surface of the outer cutter 11 can be supported by these support members 15. In this example, a structure in which a continuous annular contact plate 16 is provided on the back surface of the outer cutter 11 and a wheel 17 is provided at an end of a support member 15 provided in a partition wall 13 facing the contact plate 16 will be described. In short, any structure may be used as long as the propulsive force acting on the outer cutter 1 can be transmitted to the partition wall 13 of the base unit 10 via the plurality of support members 15 without inhibiting the rotation of the outer cutter 11.
[0009]
<D> Operation When the shield machine is dug while rotating the rotary cutter 21 and the outer cutter 11, the outer cutter 11 rotates while being supported by the wheel 17 simply provided on the support member 15. The propulsive force received by the outer cutter 11 is supported by the wheel 17 that contacts the back surface of the outer cutter 11 and a plurality of support members 15 that support the wheel 17, and the outer cutter 11 does not have insufficient strength. The propulsive force received by the outer cutter 11 is finally supported by the partition wall 13.
The number of installed support members 15 for supporting the outer circumferential cutter 11 is assumed to be appropriately selected by drilling diameter, the supporting force may be a number that will be evenly distributed on the partition wall 13.
Further, the present invention is characterized in that the support structure of the outer cutter 11 is one of the features, and it goes without saying that various known structures can be applied to the structures of the parent device 10 and the child device 20 other than this.
[0010]
Second Embodiment of the Invention
FIG. 5 shows another embodiment in which wheels 17 are provided on the outer cutter 11 side. In this embodiment, a plurality of sets of brackets 18 are attached to the back surface of the outer cutter 11 at a predetermined interval, and wheels 17 are attached to these brackets 18. On the other hand, an annular rail 19 is disposed at the end of the support member 15 provided on the partition wall 13 side of the base unit 10.
[0011]
Embodiment 3 of the Invention
FIG. 6 shows another embodiment in which an annular rail 19a is provided on the back side of the outer cutter 11, and a wheel 17 is provided on the support member 15 on the partition wall 13 side.
[0012]
Embodiment 4 of the Invention
FIG. 7 shows another embodiment in which a support member 15 is provided on the outer cutter 11 side.
In this embodiment, support members 15 with wheels 17 are provided at a plurality of locations on the back surface of the outer cutter 11, and the annular members provided on the partition walls 13 directly or on the partition walls 13 through which these wheels 17 are opposed. The structure is such that it can run on the plate 16a.
[0013]
Embodiment 5 of the Invention
The outer cutter 11 is not limited to a single ring, and may be composed of a plurality of rings. In this case, a plurality ring body constituting the outer peripheral cutter 11, it is necessary to position on the same circle with respect to the rotation center of the rotary cutter 21 of the handset 20.
[0014]
【The invention's effect】
Since the present invention is as described above, the following effects can be obtained.
<A> The propulsive force received by the outer cutter can be effectively supported by the support member with a simple structure in which the support member is simply provided between the outer cutter and the bulkhead of the master unit. Therefore, it is possible to excavate hard ground such as a gravel layer by applying a large driving force to the outer cutter.
<B> It is possible to reinforce the outer cutter without designing it firmly, and it is possible to adopt a roller bit effective as a measure against gravel.
<C> The rotational resistance of the outer cutter can be extremely reduced by providing the support member and the wheel on the sliding portion of the support member.
<D> When the rotary cutter is detached from the outer cutter to turn the slave unit, the outer cutter is held by the master unit via the support member, so that it is possible to smoothly separate the cutters without rattling between the cutters. .
[Brief description of the drawings]
1 is an overall view of a shield machine according to the present invention. FIG. 2 is an overall view of a shield machine that is partially omitted according to Embodiment 1 of the present invention. FIG. 3 is a shield view from the face side. Explanatory drawing of the cutter face of the excavator [FIG. 4] Partial enlarged sectional view of the outer cutter [FIG. 5] Partial enlarged sectional view of the outer cutter showing another embodiment in which wheels are provided on the outer cutter [FIG. 6] Partial enlarged sectional view of an outer cutter showing another embodiment provided with a rail on the cutter side. FIG. 7 is a partially enlarged sectional view of an outer cutter showing another embodiment provided with a support member on the outer cutter. Explanation of]
DESCRIPTION OF SYMBOLS 10 Base machine 11 Peripheral cutter 13 Bulkhead 15 Support member 17 Wheel 18 Bracket 19 Rail 20 Slave unit 21 Rotating cutter 23 Rotating shaft 25 Roller bit 26 Bit

Claims (4)

親機の内部に旋回可能に子機を収容し、
子機の回転カッタの回転軸の回転で、回転カッタの周縁の外周カッタを回転し、
回転カッタと外周カッタの両カッタで、親機の全断面を掘削して立坑を構築し、
親機が所定の深度に達したら、回転カッタを外周カッタから分離した後、
回転カッタとともに子機を９０度旋回させて、
子機の回転カッタを、親機の側面に設けた開口部から外部に向けて掘進して立坑と連通した横坑を構築するシールド掘進機において、
外周カッタの背面と親機の隔壁との間に支持部材を配設し、
前記支持部材を介して外周カッタに作用する推進力を親機の隔壁で支持できるように構成したことを特徴とする、
シールド掘進機。The child machine is housed inside the parent machine so that it can turn,
The outer cutter around the periphery of the rotary cutter is rotated by the rotation of the rotary shaft of the rotary cutter of the slave unit.
A shaft is constructed by excavating the entire cross section of the main unit with both the rotary cutter and the outer cutter.
When the master unit reaches a predetermined depth, after separating the rotary cutter from the outer cutter,
Turn the handset 90 degrees with the rotating cutter,
In the shield machine that builds a horizontal shaft that communicates with the vertical shaft by digging the rotary cutter of the slave unit to the outside from the opening provided on the side surface of the master unit,
A support member is disposed between the back surface of the outer cutter and the bulkhead of the master unit,
The propulsive force acting on the outer cutter via the support member is configured to be supported by the bulkhead of the master unit,
Shield machine. 請求項１記載に記載の発明において、
支持部材の端部に車輪を設けたことを特徴とする、
シールド掘進機。In the invention described in claim 1,
The wheel is provided at the end of the support member,
Shield machine. 請求項１に記載の発明おいて、
支持部材と対向する外周カッタの背面又は親機の隔壁に車輪を設けたことを特徴とする、
シールド掘進機。In the invention of claim 1,
The wheel is provided on the back of the outer cutter facing the support member or on the bulkhead of the master unit,
Shield machine. 請求項２または３に記載の発明において、
車輪と対向する外周カッタの背面又は親機の隔壁に環状のレールを設けたことを特徴とする、
シールド掘進機。In the invention according to claim 2 or 3,
An annular rail is provided on the back of the outer cutter facing the wheel or on the bulkhead of the master unit.
Shield machine.
JP33826095A 1995-12-01 1995-12-01 Shield machine Expired - Fee Related JP3911041B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33826095A JP3911041B2 (en) 1995-12-01 1995-12-01 Shield machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33826095A JP3911041B2 (en) 1995-12-01 1995-12-01 Shield machine

Publications (2)

Publication Number Publication Date
JPH09158678A JPH09158678A (en) 1997-06-17
JP3911041B2 true JP3911041B2 (en) 2007-05-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP33826095A Expired - Fee Related JP3911041B2 (en) 1995-12-01 1995-12-01 Shield machine

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JP (1) JP3911041B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010024734A (en) * 2008-07-22 2010-02-04 Iseki Poly-Tech Inc Excavator
CN102889086B (en) * 2012-09-26 2015-06-24 华北电力大学 Full-section tunneling machine for changing connecting radius between cutter head and rotary support
JP6137617B2 (en) * 2013-08-16 2017-05-31 株式会社宏大 Excavation ring for sheath tube, sheath tube, and method of constructing sheath tube

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