JPH07102886A - Large cross section rectangular shield excavator - Google Patents
Large cross section rectangular shield excavatorInfo
- Publication number
- JPH07102886A JPH07102886A JP25289793A JP25289793A JPH07102886A JP H07102886 A JPH07102886 A JP H07102886A JP 25289793 A JP25289793 A JP 25289793A JP 25289793 A JP25289793 A JP 25289793A JP H07102886 A JPH07102886 A JP H07102886A
- Authority
- JP
- Japan
- Prior art keywords
- square
- section
- cross
- fixed
- shield excavator
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、断面積の大きい略矩
形の孔を掘進する大断面矩形シールド掘削機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-section rectangular shield excavator that excavates a substantially rectangular hole having a large cross-sectional area.
【０００２】[0002]
【従来の技術】従来、大断面の横孔を掘削するシールド
掘削機としては、円筒形状のスキンプレートの内周前方
に回転可能に取付けられた単一のカッタヘッドを回転さ
せて、断面積の大きい円形の横孔を掘削するものがあ
る。2. Description of the Related Art Conventionally, as a shield excavator for excavating a large cross-section lateral hole, a single cutter head rotatably mounted in front of the inner circumference of a cylindrical skin plate is rotated to reduce the cross-sectional area. Some excavate large circular holes.
【０００３】しかしながら、上記シールド掘削機では、
カッタヘッドの回転により掘削するため、断面が円形の
横孔しか掘削できず、断面が矩形の横孔を掘削すること
ができない。そこで、最近、断面積が大きく、かつ断面
が略矩形の横孔を掘削できる大断面矩形シールド掘削機
が本出願人により考えられた。（この大断面矩形シール
ド掘削機は公知ではないが、便宜上説明される。）この
大断面矩形シールド掘削機は、断面積が大きく、かつ断
面が略矩形状のスキンプレートの内周に沿って、断面が
略正方形の横孔を掘削する正方形掘削部を複数配置し、
複数の断面略正方形状の横孔を掘削することにより、断
面積の大きい矩形の横孔を掘削するものである。However, in the above shield excavator,
Since the excavation is performed by the rotation of the cutter head, only a horizontal hole having a circular cross section can be drilled, and a horizontal hole having a rectangular cross section cannot be drilled. Therefore, the present applicant has recently considered a large-section rectangular shield excavator capable of excavating a lateral hole having a large cross-sectional area and a substantially rectangular cross-section. (This large-section rectangular shield excavator is not known, but will be described for convenience.) This large-section rectangular shield excavator has a large cross-sectional area, and along the inner circumference of a skin plate having a substantially rectangular cross section, Arrange a plurality of square excavation parts for excavating a horizontal hole with a substantially square cross section,
By excavating a plurality of lateral holes having a substantially square cross section, a rectangular lateral hole having a large cross-sectional area is excavated.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記大
断面矩形シールド掘削機では、上記スキンプレートの内
周に上記正方形掘削部を例えば縦にＭ列、横にＮ列配置
すると、各正方形掘削部は略正方形の横孔を掘削するの
で、掘削する横孔の断面は縦横の比がＭ対Ｎの略長方形
となる。このため、上記大断面矩形シールド掘削機が掘
削できる横孔の断面形状は、縦横の比が常に整数比の矩
形の断面しか掘削することができない。したがって、縦
横の比が任意の矩形の孔を掘削することができないとい
う問題がある。However, in the large-section rectangular shield excavator, if the square excavation portions are arranged on the inner periphery of the skin plate, for example, M rows vertically and N rows horizontally, each square excavation portion is Since a substantially square lateral hole is excavated, the cross section of the lateral hole to be excavated is a substantially rectangular shape having an aspect ratio of M: N. For this reason, as for the cross-sectional shape of the horizontal hole that can be excavated by the large-section rectangular shield excavator, only a rectangular cross-section whose aspect ratio is always an integer ratio can be excavated. Therefore, there is a problem that it is not possible to excavate a rectangular hole having an arbitrary aspect ratio.
【０００５】そこで、この発明の目的は、複数の正方形
掘削部が掘削する孔の断面を隣接する正方形掘削部どう
しで互いに重ね合わせることによって、断面積が大き
く、かつ縦横の比が任意の略矩形状の横孔を掘削できる
大断面矩形シールド掘削機を提供することにある。Therefore, an object of the present invention is to superimpose the cross-sections of the holes excavated by a plurality of square excavation portions on each other so that the adjoining square excavation portions have a large cross-sectional area and an aspect ratio of approximately rectangular. An object is to provide a large-section rectangular shield excavator capable of excavating a lateral hole having a shape.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、この発明の大断面矩形シールド掘削機は、断面略矩
形状のスキンプレートの内周に沿って配置され、断面略
正方形状の孔を掘削する複数の正方形掘削部を備えた大
断面矩形シールド掘削機であって、上記正方形掘削部
は、上記スキンプレートに固定された内歯ギヤと、ピッ
チ円の直径が上記内歯ギヤのピッチ円の直径の略３／４
倍であり、かつ上記内歯ギヤと噛合する外歯ギヤと、上
記外歯ギヤに固定された回転軸と、上記回転軸に固定さ
れたカッタヘッドとを有し、上記カッタヘッドは、上記
回転軸に固定された固定部と、上記固定部に一端が固定
され、互いになす角が略１２０度に放射状に延び、先端
を互いに結ぶと略正三角形を形成する３本のカッタアー
ムとを有し、隣接する少なくとも二つの上記正方形掘削
部は、上記カッタヘッドが互いに逆回転すると共に、上
記隣接する正方形掘削部の上記内歯ギヤのピッチ円の中
心間の距離が上記略正方形の一辺よりも短いことを特徴
としている。In order to achieve the above object, a large-section rectangular shield excavator according to the present invention is arranged along the inner circumference of a skin plate having a substantially rectangular cross section, and has a hole having a substantially square cross section. A large-section rectangular shield excavator having a plurality of square excavating portions to be excavated, wherein the square excavating portion has an internal gear fixed to the skin plate, and a diameter of a pitch circle is a pitch circle of the internal gear. About 3/4 of the diameter of
And an external gear that doubles and meshes with the internal gear, a rotary shaft fixed to the external gear, and a cutter head fixed to the rotary shaft. It has a fixed portion fixed to the shaft, and three cutter arms, one end of which is fixed to the fixed portion, radially extends at an angle of about 120 degrees, and forms a substantially equilateral triangle when the tips are connected to each other. In the at least two adjacent square excavated portions, the cutter heads rotate in opposite directions, and the distance between the centers of the pitch circles of the internal gears of the adjacent square excavated portions is shorter than one side of the substantially square. It is characterized by that.
【０００７】[0007]
【作用】上記大断面矩形シールド掘削機によれば、断面
略矩形状のスキンプレートの内周に沿って配置された複
数の正方形掘削部は、上記回転軸を上記内歯ギヤの中心
に対して公転させると、この回転軸に固定された上記外
歯ギヤは内歯ギヤに噛合して、公転しながら自転する。
したがって、上記回転軸は内歯ギヤの中心の回りを公転
しながら自転して、遊星運動を行うのである。そして、
上記外歯ギヤのピッチ円の直径と内歯ギヤのピッチ円の
直径との比が３対４であるから、上記回転軸の遊星運動
に伴って、この回転軸に固定されたカッタヘッドのカッ
タアームの先端を互いに結んで形成された略正三角形
は、軌跡の包絡線が略正方形となる。したがって、上記
正方形掘削部は、断面が略正方形状の孔を掘削する。こ
のとき、隣接する少なくとも二つの正方形掘削部の内歯
ギヤのピッチ円の中心間の距離を略正方形状の孔の断面
の一辺よりも短くしているので、上記隣接する正方形掘
削部が掘削する略正方形状の断面は互いに重なり合う。
このとき、上記隣接する正方形掘削部の回転軸は互いに
逆回転することによって、カッタヘッドが互いに当たる
ことはない。According to the large-section rectangular shield excavator, the plurality of square excavation portions arranged along the inner periphery of the skin plate having a substantially rectangular cross-section have the rotary shaft with respect to the center of the internal gear. When revolved, the external gear fixed to the rotating shaft meshes with the internal gear and rotates while revolving.
Therefore, the rotary shaft revolves around the center of the internal gear while rotating about its axis to perform a planetary motion. And
Since the ratio between the diameter of the pitch circle of the external gear and the diameter of the pitch circle of the internal gear is 3: 4, the cutter of the cutter head fixed to this rotary shaft is accompanied by the planetary motion of the rotary shaft. The substantially regular triangle formed by connecting the ends of the arms to each other has a substantially square envelope. Therefore, the square excavator excavates a hole having a substantially square cross section. At this time, since the distance between the centers of the pitch circles of the internal gears of at least two adjacent square excavating parts is shorter than one side of the cross section of the substantially square hole, the adjoining square excavating parts excavate. The substantially square cross sections overlap each other.
At this time, the rotating shafts of the adjacent square excavating portions rotate in opposite directions, so that the cutter heads do not hit each other.
【０００８】したがって、隣接する少なくとも二つの正
方形掘削部が掘削する略正方形状の孔の断面を重ね合わ
せることができるから、正方形掘削部の縦横の配列数を
選択することと、上記隣接する正方形掘削部の内歯ギヤ
のピッチ円の中心間の距離を掘削する断面の略正方形の
一辺より短く調整することにより、縦横の比が整数比だ
けでなく、任意の縦横の比の略矩形状の断面の孔を掘削
する大断面矩形シールド掘削機を実現できる。Therefore, since the cross-sections of the substantially square holes excavated by at least two adjacent square excavation portions can be overlapped with each other, it is possible to select the number of vertical and horizontal arrangements of the square excavation portions, and By adjusting the distance between the centers of the pitch circles of the internal gears to be shorter than one side of the square of the cross section to be excavated, the aspect ratio is not only an integer ratio, but also a substantially rectangular cross section with an arbitrary aspect ratio. It is possible to realize a large-section rectangular shield excavator that excavates a hole.
【０００９】[0009]
【実施例】以下、この発明の大断面矩形シールド掘削機
を一実施例により詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A large-section rectangular shield excavator of the present invention will be described in detail below with reference to an embodiment.
【００１０】図１はこの発明の一実施例の大断面矩形シ
ールド掘削機の断面図を示しており、１は断面積が大き
くかつ断面が略長方形状のスキンプレート、２は上記ス
キンプレート１の内周前方に配置され、複数の円穴２ａ
を穿った固定隔壁、３は上記固定隔壁２の各円穴２ａに
嵌合され、ベアリング１５を介して回転自在に支持され
た複数の回転隔壁、４は上記スキンプレート１の内周に
固定隔壁２の後方に所定の間隔をあけて配置され、上記
固定隔壁２の各円穴２ａの中心と対向する位置を中心と
した円穴４ａを穿った支持壁、５は上記支持壁４の各円
穴４ａに嵌合され、ブッシュ６を介して回転自在に支持
された複数のクランク輪である。上記各ブッシュ６の内
周にクランク輪５を回転駆動する電動機１１を夫々配置
している。そして、上記回転隔壁３の中心に対して一定
量偏心した位置と、クランク輪５の中心に対して上記一
定量偏心した位置に回転軸１０を夫々回転自在に支持し
ている。上記各回転軸１０の前方の一端には、カッタヘ
ッド２０を夫々固定する一方、上記各回転軸１０の回転
隔壁３とクランク輪５との間に位置する部分には、外歯
ギヤ３１を夫々固定している。上記各外歯ギヤ３１は、
上記スキンプレート１の内側にスペーサ板３３を介して
中心が回転隔壁３の中心と一致するように配置された内
歯ギヤ３２と夫々噛合している。上記外歯ギヤ３１と内
歯ギヤ３２で偏心リングギヤ装置３０を構成しており、
上記外歯ギヤ３１のピッチ円の直径と内歯ギヤ３２のピ
ッチ円の直径との比を３対４としている。上記回転隔壁
３,クランク輪５,回転軸１０,偏心リングギヤ装置３０
および電動機１１で正方形掘削部５０を構成している。
また、上記スキンプレート１の内周の後方に支持壁４か
ら所定の間隔をあけて略長方形状の穴４０ａを有する取
付部材４０を配置し、この取付部材４０に複数の推進ジ
ャッキ３７を取り付けている。上記複数の推進ジャッキ
３７は、後方に覆工されたセグメント３８を押して、こ
の大断面矩形シールド掘削機を前方に推進するようにし
ている。FIG. 1 is a sectional view of a large-section rectangular shield excavator according to an embodiment of the present invention, in which 1 is a skin plate having a large cross-sectional area and a substantially rectangular cross-section, and 2 is the skin plate 1. A plurality of circular holes 2a arranged in front of the inner circumference
A plurality of rotary partition walls fitted with the circular holes 2a of the fixed partition wall 2 and rotatably supported by bearings 15 are fixed partition walls on the inner circumference of the skin plate 1. 2 is a rear wall of the fixed partition wall 2 and a supporting wall 5 having a circular hole 4a centered at a position facing the center of the circular hole 2a of the fixed partition wall 2 is a circle of the supporting wall 4. It is a plurality of crank wheels fitted in the holes 4a and rotatably supported via bushes 6. Electric motors 11 that rotate and drive the crank wheels 5 are arranged on the inner circumferences of the bushes 6, respectively. The rotary shaft 10 is rotatably supported at a position eccentric to the center of the rotary partition wall 3 and a position eccentric to the center of the crank ring 5, respectively. The cutter heads 20 are fixed to the front ends of the rotary shafts 10, respectively, while external gears 31 are respectively provided at the portions of the rotary shafts 10 located between the rotary partition walls 3 and the crank wheels 5. It is fixed. The external gears 31 are
The inner tooth gears 32 are arranged inside the skin plate 1 via a spacer plate 33 so that their centers coincide with the centers of the rotary partition walls 3, respectively. The external gear 31 and the internal gear 32 constitute an eccentric ring gear device 30,
The ratio of the diameter of the pitch circle of the external gear 31 and the diameter of the pitch circle of the internal gear 32 is 3: 4. The rotary partition wall 3, the crank ring 5, the rotary shaft 10, the eccentric ring gear device 30.
Further, the electric motor 11 constitutes the square excavation unit 50.
Further, a mounting member 40 having a substantially rectangular hole 40a is arranged behind the inner periphery of the skin plate 1 at a predetermined distance from the support wall 4, and a plurality of propulsion jacks 37 are mounted on the mounting member 40. There is. The plurality of propulsion jacks 37 push the segment 38 lined rearward to propel the large-section rectangular shield excavator forward.
【００１１】上記カッタヘッド２０は、上記回転軸１０
の先端に固定された固定部２１と、この固定部２１に一
端が固定され、互いになす角が略１２０度に放射状に延
びる３本のカッタアーム２２（図１では２本のみを示
す）とから構成されている。そして、上記固定部２１と
カッタアーム２２の前面には、地盤を掘削するカッタ
歯、ビット等を夫々配置している。また、上記カッタア
ーム２２の後面には、攪拌羽根２６を夫々固定してい
る。なお、上記各カッタアーム２２の先端を互いに結ぶ
と正三角形が形成されるようにしている。The cutter head 20 includes the rotary shaft 10
From a fixed part 21 fixed to the tip of the cutter, and three cutter arms 22 (only two of which are shown in FIG. 1) having one end fixed to the fixed part 21 and extending radially at an angle of about 120 degrees. It is configured. On the front surfaces of the fixed portion 21 and the cutter arm 22, cutter teeth for excavating the ground, bits and the like are arranged, respectively. Further, stirring blades 26 are fixed to the rear surface of the cutter arm 22, respectively. An equilateral triangle is formed by connecting the tips of the cutter arms 22 to each other.
【００１２】図２は上記正方形掘削部５０を正面から見
た概略図であり、掘削する孔の断面の略正方形Ｈの一辺
の長さをＳとし、上記カッタアーム２２の先端を互いに
結んで形成した正三角形の一辺の長さをＳとしている。
また、図１に示す内歯ギヤ３２のピッチ円の中心Ｏが断
面の略正方形Ｈの中心と一致している。このとき、上記
外歯ギヤ３１の偏心量ｅと内歯ギヤ３２のピッチ円の直
径ｒは、 ｅ＝（１／３1/2−１／２）×Ｓ ・・・（１） ｒ＝８×ｅ ・・・・・（２） としている。例えば、上記内歯ギヤ３２の半径Ｒ１＝
４、外歯ギヤ３１の半径Ｒ２＝３とすると、外歯ギヤ３
１は、内歯ギヤ３２のピッチ円の中心Ｏに対して偏心量
ｅ＝１だけ偏心していることになる。上記式（１）,
（２）において、偏心量ｅ＝１とすると、断面略正方形
Ｈの一辺の長さＳ＝略１４、内歯ギヤ３２のピッチ円の
直径ｒ＝８となる。そして、上記内歯ギヤ３２のピッチ
円の外側には、機械製作上の駆動機構の外縁があり、そ
の直径Ｄは断面略正方形Ｈの一辺の長さＳの０．８倍と
している。つまり、上記内歯ギヤ３２のピッチ円の中心
Ｏを中心とする直径Ｄ＝０．８・Ｓの円Ｃとなり、この
円Ｃの外側の領域を互いに重ね合わせることが可能であ
る。FIG. 2 is a schematic view of the square excavation section 50 as seen from the front, in which the length of one side of the substantially square H of the cross section of the excavation hole is S and the tips of the cutter arms 22 are connected to each other. The length of one side of the regular triangle is S.
Further, the center O of the pitch circle of the internal gear 32 shown in FIG. 1 coincides with the center of the substantially square H of the cross section. At this time, the eccentricity e of the external gear 31 and the diameter r of the pitch circle of the internal gear 32 are e = (1/31 / 2-1 / 2) * S ... (1) r = 8 Xe ... (2) For example, the radius R1 of the internal gear 32 is R1 =
4 and the radius R2 of the external gear 31 = 3, the external gear 3
1 means that the center O of the pitch circle of the internal gear 32 is eccentric by the eccentric amount e = 1. The above formula (1),
In (2), when the eccentricity e = 1, the length S of one side of the substantially square section H = about 14, and the diameter r of the pitch circle of the internal gear 32 is r = 8. The outer edge of the mechanical drive mechanism is located outside the pitch circle of the internal gear 32, and its diameter D is 0.8 times the length S of one side of the substantially square section H. That is, a circle C having a diameter D = 0.8 · S with the center O of the pitch circle of the internal gear 32 as the center is formed, and the regions outside the circle C can be overlapped with each other.
【００１３】図３は上記スキンプレート１の内周に正方
形掘削部５０を縦に２列、横に３列配置し、隣接する正
方形掘削部５０の内歯ギヤ３２のピッチ円の中心間の距
離を円Ｃの直径Ｄに近くして、隣接する正方形掘削部５
０が掘削する略正方形状の孔の断面が重なるようにして
いる。上記各正方形掘削部５０のカッタヘッド２０は、
縦の列を同一位相とし、隣接する縦の列どうしは略６０
度位相が異なるようにしている。つまり、上記カッタヘ
ッド２０を略６０度回転させるには、そのカッタヘッド
２０が固定された回転軸１０（図１に示す）を内歯ギヤ
３１と共に略１８０度公転させるのである。このように
して、隣接するカッタヘッド２０を同じ回転速度で、図
３の矢印に示すように互いに逆回転すると、カッタヘッ
ド２０どうしが当たることはない。なお、上記各正方形
掘削部５０のカッタヘッド２０は、横の列を同一位相と
し、隣接する横の列どうしが略６０度位相が異なるよう
にしてもよい。FIG. 3 shows that the square excavation portions 50 are arranged vertically in two rows and three rows in the inner periphery of the skin plate 1, and the distance between the centers of the pitch circles of the internal gears 32 of the adjacent square excavation portions 50 is large. Adjacent to the diameter D of the circle C and adjacent square excavation parts 5
The cross-sections of the substantially square holes to be drilled by 0 overlap. The cutter head 20 of each of the square excavating units 50 is
Vertical columns have the same phase, and adjacent vertical columns have approximately 60
The phase is different. That is, in order to rotate the cutter head 20 by approximately 60 degrees, the rotary shaft 10 (shown in FIG. 1) to which the cutter head 20 is fixed is revolved together with the internal gear 31 by approximately 180 degrees. In this way, when the adjacent cutter heads 20 are rotated at the same rotation speed and opposite to each other as shown by the arrow in FIG. 3, the cutter heads 20 do not hit each other. In the cutter head 20 of each of the square excavating units 50, the horizontal rows may have the same phase, and the adjacent horizontal rows may have a phase difference of approximately 60 degrees.
【００１４】上記構成の大断面矩形シールド掘削機は、
図１において、後方に覆工されたセグメント３８の前方
端を推進ジャッキ３７で押して推進しながら、電動機１
１によってクランク輪５を回転させる。このとき、隣接
する正方形掘削部５０のクランク輪５は、互いに逆方向
に同じ回転速度で回転するようにしている。そして、上
記クランク輪５が回転すると、回転軸１０はクランク輪
５の中心の回りを回ると共に、上記回転軸１０に固定さ
れた外歯ギヤ３１が内歯ギヤ３２に噛合して自転するこ
とによって、回転軸１０はクランク輪５が３回転する間
に逆方向に１回転自転する。すなわち、上記偏心リング
ギヤ装置３０の外歯ギヤ３１のピッチ円の直径と内歯ギ
ヤ３２のピッチ円の直径との比を３対４にしているの
で、内歯ギヤ３１が外歯ギヤ３２の内周を３回公転する
とき、内歯ギヤ３１は１回転するのである。このとき、
上記回転隔壁３もクランク軸５と同一方向に３回転す
る。そして、上記回転軸１０の公転によって、カッタヘ
ッド２０もクランク輪５が３回転する間に逆方向に１回
転して遊星運動を行う。The large-section rectangular shield excavator having the above structure is
In FIG. 1, while pushing the front end of the segment 38 lined rearward with the propulsion jack 37 for propulsion, the electric motor 1
The crank wheel 5 is rotated by 1. At this time, the crank wheels 5 of the adjacent square excavation parts 50 are rotated in opposite directions at the same rotational speed. When the crank wheel 5 rotates, the rotary shaft 10 rotates around the center of the crank wheel 5, and the external gear 31 fixed to the rotary shaft 10 meshes with the internal gear 32 to rotate on its own axis. The rotating shaft 10 rotates one revolution in the opposite direction while the crank wheel 5 makes three revolutions. That is, since the ratio of the diameter of the pitch circle of the external gear 31 and the diameter of the pitch circle of the internal gear 32 of the eccentric ring gear device 30 is set to 3: 4, the internal gear 31 is less than the internal gear 32. When revolving around the circumference three times, the internal gear 31 makes one rotation. At this time,
The rotary partition wall 3 also rotates three times in the same direction as the crankshaft 5. Then, due to the revolution of the rotary shaft 10, the cutter head 20 also makes one planetary rotation in the opposite direction while the crank ring 5 makes three revolutions.
【００１５】したがって、上記カッタヘッド２０の各カ
ッタアーム２２の先端を互いに結んで形成された正三角
形は、軌跡の包絡線が略正方形となり、各カッタヘッド
２０は、断面が略正方形状で、かつ隣接する部分が重な
り合う横孔を夫々掘削して、スキンプレート１の断面と
同形の断面積の大きな略長方形の横孔を形成する。な
お、隣接するカッタヘッド２０は互いに逆方向に回転す
るので、掘削する略正方形状の孔が重なり合っても、当
たることがない。Therefore, the equilateral triangle formed by connecting the tips of the cutter arms 22 of the cutter head 20 with each other has a substantially square envelope, and each cutter head 20 has a substantially square cross section. The horizontal holes in which the adjacent portions overlap each other are excavated to form substantially rectangular horizontal holes having the same cross-sectional area as the cross section of the skin plate 1. Since the adjacent cutter heads 20 rotate in the opposite directions, even if the substantially square holes to be excavated overlap each other, they do not hit each other.
【００１６】そして、掘削された土砂や礫は、カッタヘ
ッド２０と固定隔壁２との間の土圧室１６内に溜り、カ
ッタヘッド２０とカッタアーム２２の攪拌羽根２６によ
って攪拌される。その後、上記土圧室１６内の溜った土
砂や礫は、図示しない拝土口を通ってスクリューコンベ
ア３５によって外部に排出される。Then, the excavated earth and sand and gravel are accumulated in the earth pressure chamber 16 between the cutter head 20 and the fixed partition wall 2, and are agitated by the agitating blades 26 of the cutter head 20 and the cutter arm 22. After that, the earth and sand and gravel accumulated in the earth pressure chamber 16 are discharged to the outside by the screw conveyor 35 through an unillustrated earth mouth.
【００１７】このように、上記スキンプレート１の内周
に沿って同一外形の正方形掘削部５０を配置し、隣接す
る正方形掘削部５０の内歯ギヤ３２のピッチ円の中心間
の距離を正方形掘削部５０が掘削する横孔の略正方形の
一辺の長さよりも短くすることによって、各正方形掘削
部５０は断面略正方形状の横孔が互いに隣接する部分で
重なるように夫々掘削する。したがって、断面積が大き
く、縦横の比が２：３でない断面略矩形状の横孔を掘削
する。In this way, the square excavation portions 50 having the same outer shape are arranged along the inner periphery of the skin plate 1, and the distance between the centers of the pitch circles of the internal gears 32 of the adjacent square excavation portions 50 is square excavated. By making the length of each of the lateral holes to be excavated by the portion 50 shorter than one side of the substantially square shape, each of the square excavating portions 50 excavates such that the lateral holes having a substantially square cross-section are overlapped at the portions adjacent to each other. Therefore, a horizontal hole having a large cross-sectional area and a substantially rectangular cross-section whose aspect ratio is not 2: 3 is excavated.
【００１８】例えば、二つの正方形掘削部５０を横一列
に配置した構成の大断面矩形シールド掘削機では、各正
方形掘削部５０が掘削する略正方形状の断面を重ね合わ
せない場合、縦横の比は１対２となる。一方、隣接する
各正方形掘削部５０が掘削する略正方形状の断面を重ね
合わせた場合、上述の機械製作上の駆動機構の外縁の円
Ｃ（直径Ｄ＝０．８・Ｓ）の外側領域を重ねることがで
きる。したがって、上記円Ｃが互いに接するところまで
重ね合わせることができるから、 縦横の比＝１．０：１．８ から、 縦横の比＝１．０：２．０ まで変えることができる。For example, in a large-section rectangular shield excavator having a configuration in which two square excavating parts 50 are arranged in a horizontal row, when the substantially square cross-sections excavated by each square excavating part 50 are not overlapped, the aspect ratio is It becomes 1 to 2. On the other hand, when the substantially square cross-sections to be excavated by the adjacent square excavation units 50 are overlapped with each other, the outer region of the circle C (diameter D = 0.8 · S) of the outer edge of the drive mechanism in the above mechanical manufacturing is overlapped. Can be stacked. Therefore, since the circles C can be overlapped to the point where they are in contact with each other, the aspect ratio can be changed from the aspect ratio = 1.0: 1.8 to the aspect ratio = 1.0: 2.0.
【００１９】また、四つの正方形掘削部５０を縦に２
列、横に２列に配置した構成の大断面矩形シールド掘削
機では、各正方形掘削部５０が掘削する略正方形状の断
面を重ね合わせない場合、縦横の比は１対１となる。一
方、隣接する正方形掘削部５０が掘削する略正方形状の
断面を重ね合わせた場合、隣接する円Ｃが互いに接する
まで重ね合わせることができるから、 縦横の比＝１．０：０．９ から、 縦横の比＝１．０：１．１１ まで変えることができる。Further, four square excavation parts 50 are vertically arranged in two.
In the large-section rectangular shield excavator configured to be arranged in rows and in two rows horizontally, the aspect ratio becomes 1: 1 if the substantially square cross sections excavated by the square excavating units 50 are not overlapped. On the other hand, when the substantially square cross sections that are excavated by the adjacent square excavating units 50 are overlapped, they can be overlapped until the adjacent circles C are in contact with each other. Therefore, from the aspect ratio = 1.0: 0.9, The aspect ratio can be changed up to 1.0: 1.11.
【００２０】このように、上記正方形掘削部５０の縦横
の配列数を選択し、隣接する正方形掘削部５０が掘削す
る略正方形状の横孔の断面の重ね合わせる領域を調整す
ることによって、縦横の比が整数比だけでなく、所望の
縦横の比の断面略矩形状で、かつ断面積が大きい横孔を
掘削することができる。In this way, by selecting the number of vertical and horizontal arrangements of the square excavation portions 50 and adjusting the overlapping region of the cross sections of the substantially square lateral holes excavated by the adjacent square excavation portions 50, the vertical and horizontal arrangements can be performed. Not only the ratio is an integer ratio, but also a horizontal hole having a desired vertical-horizontal ratio and a substantially rectangular cross-section and a large cross-sectional area can be excavated.
【００２１】また、上記実施例では、掘進方向が水平方
向の横孔を掘削したが、縦穴を掘削するのにこの発明の
大断面矩形シールド掘削機を用いてもよい。Further, in the above-mentioned embodiment, the horizontal hole whose excavation direction is the horizontal direction was excavated, but the large-section rectangular shield excavator of the present invention may be used for excavating the vertical hole.
【００２２】また、上記スキンプレート１の内周の領域
全てに正方形掘削部５０を配置したが、正方形掘削部を
スキンプレートの内周に沿って配置して、スキンプレー
トの内周の中央付近に正方形掘削部を配置しなくてもよ
い。Further, although the square excavated portion 50 is arranged in the entire area of the inner periphery of the skin plate 1, the square excavated portion is arranged along the inner periphery of the skin plate so as to be located near the center of the inner periphery of the skin plate. It is not necessary to arrange the square excavation part.
【００２３】また、上記正方形掘削部５０が掘削する全
ての断面を互いに重ね合わせたが、縦横の一方を短くす
るようにしてもよい。また、例えば複数の正方形掘削部
を横一列に並べた場合、隣接する少なくとも二つの正方
形掘削部の断面を重ね合わせてもよい。Further, although all the cross sections to be excavated by the square excavating section 50 are overlapped with each other, one of the vertical and horizontal sides may be shortened. Further, for example, when a plurality of square excavated portions are arranged in a row, the cross sections of at least two adjacent square excavated portions may be overlapped.
【００２４】また、上記支持壁４に回転自在に支持され
たクランク輪５を回転駆動することによって、回転軸１
０を遊星運動させたが、回転軸を遊星運動させる駆動機
構はこれに限らず、支持壁やクランク輪を用いる代わり
に回転隔壁を回転駆動するようにしてもよい。By rotating the crank wheel 5 rotatably supported on the support wall 4, the rotary shaft 1
However, the drive mechanism for performing the planetary motion of the rotary shaft is not limited to this, and the rotary partition may be rotationally driven instead of using the support wall or the crank wheel.
【００２５】さらに、上記正方形掘削部５０のカッタヘ
ッド２０は、縦の列を同一位相とし、隣接する縦の列ど
うしが略６０度位相が異なるように配置したが、位相は
これに限らず、隣接するカッタヘッドが逆回転しなが
ら、互いに当たらない角度であればよい。Further, the cutter head 20 of the square excavator 50 is arranged such that the vertical rows have the same phase and the adjacent vertical rows have a phase difference of approximately 60 degrees, but the phase is not limited to this. It is only necessary that the adjacent cutter heads rotate in opposite directions but do not hit each other.
【００２６】[0026]
【発明の効果】以上より明らかなように、この発明の大
断面矩形シールド掘削機は、断面略矩形状のスキンプレ
ートの内周に沿って配置され、断面略正方形状の孔を掘
削する複数の正方形掘削部を備え、上記正方形掘削部
は、上記スキンプレートに固定された内歯ギヤと、ピッ
チ円の直径が上記内歯ギヤのピッチ円の直径の略３／４
倍であり、かつ上記内歯ギヤと噛合する外歯ギヤと、上
記外歯ギヤに固定された回転軸と、上記回転軸に固定さ
れたカッタヘッドとを有し、上記カッタヘッドは、上記
回転軸に固定された固定部と、上記固定部に一端が固定
され、互いになす角が略１２０度に放射状に延び、先端
を互いに結ぶと略正三角形を形成する３本のカッタアー
ムとを有し、隣接する少なくとも二つの正方形掘削部
は、カッタヘッドが互いに逆回転すると共に、上記隣接
する正方形掘削部の内歯ギヤのピッチ円の中心間の距離
を上記略正方形の一辺よりも短くしたものである。As is apparent from the above, the large-section rectangular shield excavator of the present invention is arranged along the inner periphery of the skin plate having a substantially rectangular cross section, and is provided with a plurality of holes for drilling a substantially square cross section. A square excavation part is provided, and the square excavation part has an internal gear fixed to the skin plate, and a diameter of the pitch circle is approximately 3/4 of a diameter of the pitch circle of the internal gear.
And an external gear that doubles and meshes with the internal gear, a rotary shaft fixed to the external gear, and a cutter head fixed to the rotary shaft. It has a fixed portion fixed to the shaft, and three cutter arms, one end of which is fixed to the fixed portion, radially extends at an angle of about 120 degrees, and forms a substantially equilateral triangle when the tips are connected to each other. , The adjoining at least two square excavating parts are such that the cutter heads rotate in opposite directions and the distance between the centers of the pitch circles of the internal gears of the adjoining square excavating parts is shorter than one side of the substantially square. is there.
【００２７】したがって、この発明の大断面矩形シール
ド掘削機によれば、上記外歯ギヤが内歯ギヤに噛合しな
がら回転軸は遊星運動し、この回転軸に固定されたカッ
タヘッドのカッタアームの先端を互いに結んで形成され
た略正三角形は、軌跡の包絡線が略正方形となり、上記
正方形掘削部のカッタヘッドは、断面が略正方形状の孔
を掘削する。このとき、隣接する少なくとも二つの正方
形掘削部の内歯ギヤのピッチ円の中心間の距離を掘削す
る孔の断面形状の略正方形の一辺よりも短くして、上記
隣接する正方形掘削部のカッタヘッドを互いに逆回転さ
せるから、上記隣接するカッタヘッドが互いに当たらな
いようにして、上記隣接する正方形掘削部が掘削する略
正方形状の孔の断面を重ね合わせることができる。した
がって、上記正方形掘削部の縦横の配列数を選択するこ
とと、隣接する少なくとも二つの正方形掘削部が掘削す
る略正方形状の孔の断面を重ね合わせる領域を調整する
ことによって、縦横の比が整数比だけでなく、任意の縦
横の比の略矩形状で、かつ断面積の大きな孔を掘削する
ことができる。Therefore, according to the large-section rectangular shield excavator of the present invention, the rotary shaft makes a planetary motion while the external gear meshes with the internal gear, and the cutter arm of the cutter head fixed to the rotary shaft is fixed. The substantially equilateral triangle formed by connecting the tips to each other has a substantially square envelope, and the cutter head of the square excavating portion excavates a hole having a substantially square cross section. At this time, the distance between the centers of the pitch circles of the internal gears of at least two adjacent square excavating parts is made shorter than one side of the substantially square shape of the cross-sectional shape of the excavating hole, so that the cutter heads of the adjoining square excavating parts are Since the adjacent cutter heads do not hit each other, the cross sections of the substantially square holes excavated by the adjoining square excavating portions can be overlapped with each other. Therefore, by selecting the number of vertical and horizontal arrangement of the square excavation portion, and by adjusting the area where the cross sections of the substantially square holes excavated by at least two adjacent square excavation portions are overlapped, the aspect ratio is an integer. It is possible to excavate not only the ratio but also a substantially rectangular hole having an arbitrary aspect ratio and a large cross-sectional area.
【図１】 この発明の一実施例の大断面矩形シールド
掘削機の断面図である。FIG. 1 is a sectional view of a large-section rectangular shield excavator according to an embodiment of the present invention.
【図２】 上記大断面矩形シールド掘削機の正方形掘削
部を正面から見た概略図である。FIG. 2 is a schematic view of a square excavation part of the large-section rectangular shield excavator seen from the front.
【図３】 上記大断面矩形シールド掘削機を正面から見
た概略図である。FIG. 3 is a schematic view of the large-section rectangular shield excavator seen from the front.
１…スキンプレート、２…固定隔壁、３…回転隔壁、４
…支持壁、５…クランク輪、６…ブッシュ、１０…回転
軸、１１…電動機、１５…ベアリング、１６…土圧室、
２０…カッタヘッド、２１…円筒部、２２…カッタアー
ム、２６…攪拌羽根、３０…偏心リングギヤ、３１…外
歯ギヤ、３２…内歯ギヤ、３３…スペーサ板、３５…ス
クリューコンベア、３７…推進ジャッキ、３８…セグメ
ント、４０…取付部材、５０…正方形掘削部。1 ... Skin plate, 2 ... Fixed partition, 3 ... Rotating partition, 4
... Support wall, 5 ... Crank ring, 6 ... Bushing, 10 ... Rotating shaft, 11 ... Electric motor, 15 ... Bearing, 16 ... Earth pressure chamber,
20 ... Cutter head, 21 ... Cylindrical part, 22 ... Cutter arm, 26 ... Stirring blade, 30 ... Eccentric ring gear, 31 ... External gear, 32 ... Internal gear, 33 ... Spacer plate, 35 ... Screw conveyor, 37 ... Propulsion Jack, 38 ... Segment, 40 ... Mounting member, 50 ... Square excavation part.
Claims (1)
沿って配置され、断面略正方形状の孔を掘削する複数の
正方形掘削部を備えた大断面矩形シールド掘削機であっ
て、 上記正方形掘削部は、上記スキンプレートに固定された
内歯ギヤと、ピッチ円の直径が上記内歯ギヤのピッチ円
の直径の略３／４倍であり、かつ上記内歯ギヤと噛合す
る外歯ギヤと、上記外歯ギヤに固定された回転軸と、上
記回転軸に固定されたカッタヘッドとを有し、 上記カッタヘッドは、上記回転軸に固定された固定部
と、上記固定部に一端が固定され、互いになす角が略１
２０度に放射状に延び、先端を互いに結ぶと略正三角形
を形成する３本のカッタアームとを有し、 隣接する少なくとも二つの上記正方形掘削部は、上記カ
ッタヘッドが互いに逆回転すると共に、上記隣接する正
方形掘削部の上記内歯ギヤのピッチ円の中心間の距離が
上記略正方形の一辺よりも短いことを特徴とする大断面
矩形シールド掘削機。1. A large-section rectangular shield excavator having a plurality of square excavation portions which are arranged along the inner circumference of a skin plate having a substantially rectangular cross section and excavate holes having a substantially square cross section. The excavation portion has an internal gear fixed to the skin plate, an external gear having a diameter of a pitch circle that is approximately 3/4 times the diameter of the pitch circle of the internal gear, and an external gear that meshes with the internal gear. And a rotary shaft fixed to the external gear, and a cutter head fixed to the rotary shaft, wherein the cutter head has a fixed portion fixed to the rotary shaft and one end to the fixed portion. It is fixed and the angle between them is about 1
It has three cutter arms that extend radially at 20 degrees and form a substantially equilateral triangle when the tips are connected to each other. A large-section rectangular shield excavator, characterized in that a distance between centers of pitch circles of the internal gears of adjacent square excavation parts is shorter than one side of the substantially square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25289793A JP2991903B2 (en) | 1993-10-08 | 1993-10-08 | Large section rectangular shield excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25289793A JP2991903B2 (en) | 1993-10-08 | 1993-10-08 | Large section rectangular shield excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07102886A true JPH07102886A (en) | 1995-04-18 |
| JP2991903B2 JP2991903B2 (en) | 1999-12-20 |
Family
ID=17243695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25289793A Expired - Fee Related JP2991903B2 (en) | 1993-10-08 | 1993-10-08 | Large section rectangular shield excavator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2991903B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02109538A (en) * | 1988-10-14 | 1990-04-23 | Rizh Medicinsk Inst | Method and apparatus for detecting position of movable boundary between biological tissues |
| JP2002283115A (en) * | 2001-03-26 | 2002-10-03 | Chem Grouting Co Ltd | Machining method and device |
| JP2002285774A (en) * | 2001-03-26 | 2002-10-03 | Chem Grouting Co Ltd | Excavating method and device |
| CN109538206A (en) * | 2018-12-19 | 2019-03-29 | 中国矿业大学 | A kind of more drill bit combination type drilling machines |
-
1993
- 1993-10-08 JP JP25289793A patent/JP2991903B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02109538A (en) * | 1988-10-14 | 1990-04-23 | Rizh Medicinsk Inst | Method and apparatus for detecting position of movable boundary between biological tissues |
| JP2002283115A (en) * | 2001-03-26 | 2002-10-03 | Chem Grouting Co Ltd | Machining method and device |
| JP2002285774A (en) * | 2001-03-26 | 2002-10-03 | Chem Grouting Co Ltd | Excavating method and device |
| JP4553284B2 (en) * | 2001-03-26 | 2010-09-29 | ケミカルグラウト株式会社 | Excavation method and apparatus |
| CN109538206A (en) * | 2018-12-19 | 2019-03-29 | 中国矿业大学 | A kind of more drill bit combination type drilling machines |
| CN109538206B (en) * | 2018-12-19 | 2024-04-09 | 中国矿业大学 | Multi-bit combined drilling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2991903B2 (en) | 1999-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |