JP4646138B2 - Existing concrete pipe crushing machine - Google Patents

Existing concrete pipe crushing machine Download PDF

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JP4646138B2
JP4646138B2 JP2006074266A JP2006074266A JP4646138B2 JP 4646138 B2 JP4646138 B2 JP 4646138B2 JP 2006074266 A JP2006074266 A JP 2006074266A JP 2006074266 A JP2006074266 A JP 2006074266A JP 4646138 B2 JP4646138 B2 JP 4646138B2
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ring
existing concrete
concrete pipe
cutter head
cylindrical portion
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JP2007247320A (en
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本間良治
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株式会社推研
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本発明は、地中に埋設された雨水の排水管又は下水道等に用いられる既設コンクリート管を破砕し、新設管を敷設するためのリング状カッターヘッドを備えた既設コンクリート管破砕用掘進機に関する。   The present invention relates to an existing concrete pipe crushing excavator equipped with a ring-shaped cutter head for crushing an existing concrete pipe used for drainage or sewer of rainwater buried in the ground and laying a new pipe.

地中に埋設された既設コンクリート管を開削工法によることなく破砕し、新設管を敷設する装置として、特開平７−９８０７７号公報（従来例１）には、全断面掘進機のように掘削断面全体に回転掘削歯を配置した掘進機により既設コンクリート管を破砕し、その後に新設管を敷設していく既設コンクリート管更新用掘進機が開示されている。
特開平７−９８０７７号公報 Japanese Patent Laid-Open No. 7-98077 (conventional example 1) discloses an excavating section as an apparatus for crushing an existing concrete pipe buried in the ground without using an open-cut method and laying a new pipe. An existing concrete pipe renewal excavator is disclosed in which an existing concrete pipe is crushed by an excavator that has rotary excavating teeth disposed throughout, and then a new pipe is laid.
JP 7-98077 A

しかしながら、従来例１の全断面掘削機では、軟鋼（ＳＳ４００）の鉄筋は切断できるが、既設コンクリート管の継輪は切断できず、既設コンクリート管の破砕作業の前に既設コンクリート管内に作業機械や作業員を入れ、継輪を数等分に切断しておく必要があった。また、カッターにより切断される鉄筋の長さが長いと、切断された鉄筋がカッターに巻き付き、それを取り除くため作業が中断することになり、効率良く既設コンクリート管を破砕できないという問題を有していた。さらに、全断面掘進機の場合、全面に掘削歯を配置しているため、重量が大きく回転トルクが大きくなり、高出力の駆動手段を備えなければならず、カッターに鉄筋が巻き付いたような場合、既設コンクリート管の反対側から作業員を入れ除去しなければならないという問題を有していた。   However, the full-section excavator of Conventional Example 1 can cut the rebars of mild steel (SS400), but cannot cut the existing concrete pipe joints. It was necessary to put a worker and cut the joint ring into several equal parts. Moreover, when the length of the reinforcing bar cut by the cutter is long, the cut reinforcing bar is wound around the cutter, and the work is interrupted to remove it, which has the problem that the existing concrete pipe cannot be efficiently crushed. It was. Furthermore, in the case of a full-section excavator, the excavating teeth are arranged on the entire surface, so the weight is large and the rotational torque is large, and it is necessary to provide a high-output drive means, such as when a reinforcing bar is wound around the cutter. There was a problem that workers had to be removed from the opposite side of the existing concrete pipe.

本発明は、前記従来例の持つ課題を解決するものである。カッターヘッドによる破砕が困難な継輪の切削も可能で、既設コンクリート管内への補助的作業の作業機械又は作業員の出入を可能とし、効率良く既設コンクリート管を破砕する既設コンクリート管破砕用掘進機を提供することを目的とする。   The present invention solves the problems of the conventional example. The existing concrete pipe crushing machine that can cut the joint ring, which is difficult to crush by the cutter head, enables auxiliary work machines or workers to enter and exit the existing concrete pipe, and crushes the existing concrete pipe efficiently. The purpose is to provide.

本発明の既設コンクリート管破砕用掘進機は、前記課題を解決するために、既設コンクリート管破砕用掘進機において、径方向に伸びる取り付け軸に回転自在に取り付けられるローラビットを中央部に開口部が形成されるように複数リング状に配置し駆動手段により回転駆動するリング状カッターヘッドとし、前記リング状カッターヘッドを先端にスリットカッターを備えた山止め円筒部内に配置し、前記複数のローラビットの取り付け軸を内径側の端部が回転方向側に位置し周方向に傾斜させて取り付けることを特徴とする。 In order to solve the above problems, the existing concrete pipe crushing excavator of the present invention has an opening at the center of a roller bit that is rotatably attached to a mounting shaft extending in the radial direction. A ring-shaped cutter head that is arranged in a plurality of rings so as to be formed and is rotationally driven by a driving means, the ring-shaped cutter head is disposed in a mountain-cylinder cylindrical portion provided with a slit cutter at the tip, and the plurality of roller bits The mounting shaft is mounted such that the end on the inner diameter side is positioned on the rotational direction side and is inclined in the circumferential direction .

また、本発明の既設コンクリート管破砕用掘進機は、既設コンクリート管破砕用掘進機において、径方向に伸びる取り付け軸に回転自在に取り付けられるローラビットを中央部に開口部が形成されるように複数リング状に配置し駆動手段により回転駆動するリング状カッターヘッドとし、前記複数のローラビットの取り付け軸を内径側の端部が軸方向の後側に位置し軸方向に傾斜させ、且つ、前記複数のローラビットの取り付け軸を内径側の端部が回転方向側に位置し周方向に傾斜させて取り付けることを特徴とする。 Further, the existing concrete pipe crushing excavator of the present invention is a plurality of existing concrete pipe crushing excavators, in which a plurality of roller bits, which are rotatably attached to a mounting shaft extending in the radial direction, are formed at the center. A ring-shaped cutter head that is arranged in a ring shape and is rotationally driven by a driving means, and the plurality of roller bit mounting shafts are inclined in the axial direction, with the end on the inner diameter side positioned on the rear side in the axial direction, and the plurality The roller bit mounting shaft is mounted such that the end on the inner diameter side is located on the rotational direction side and is inclined in the circumferential direction.

また、本発明の既設コンクリート管破砕用掘進機は、前記リング状カッターヘッドを駆動手段により正逆回転可能とし、前記ローラビットの取り付け軸の内径側の端部をピン構造とし、外周側の端部を周方向に所定角度スライド可能な周方向軸受けに取り付け、リング状カッターヘッドの回転方向の変更に応じてローラビットの取り付け軸の周方向の傾斜角度を変更可能とすることを特徴とする。 Further, the existing concrete pipe crushing excavator of the present invention is configured such that the ring-shaped cutter head can be rotated forward and reverse by a driving means, and the end portion on the inner diameter side of the mounting shaft of the roller bit has a pin structure, and the end on the outer peripheral side. The portion is attached to a circumferential bearing that is slidable by a predetermined angle in the circumferential direction, and the inclination angle in the circumferential direction of the roller bit attachment shaft can be changed in accordance with the change in the rotation direction of the ring-shaped cutter head.

また、本発明の既設コンクリート管破砕用掘進機は、前記リング状カッターヘッドの駆動手段と前記山止め円筒部とを連結又は切り離し可能として、前記山止め円筒部を回転又は非回転とすることを特徴とする。 In addition, the existing concrete pipe crushing excavator of the present invention is capable of connecting or disconnecting the driving means of the ring-shaped cutter head and the mountain stopper cylindrical portion, and rotating or non-rotating the mountain retaining cylindrical portion. Features.

また、本発明の既設コンクリート管破砕用掘進機は、前記山止め円筒部を前記リング状カッターヘッドに対して、掘進方向に伸縮可能とすることを特徴とする。 Moreover, the existing concrete pipe crushing excavator of the present invention is characterized in that the mountain stopper cylindrical portion can be expanded and contracted in the excavation direction with respect to the ring-shaped cutter head.

複数のローラビットの取り付け軸を内径側の端部が回転方向側に位置し周方向に傾斜させて取り付ける構成により、リング状カッターヘッドのローラビットにより破砕・切断された鉄筋、継輪を内径方向に取り込む作用が大きくなり、破砕・切断物の撤去・搬送作業が容易になる。
複数のローラビットの取り付け軸を内径側の端部が軸方向の後側に位置し軸方向に傾斜させ、且つ、前記複数のローラビットの取り付け軸を内径側の端部が回転方向側に位置し周方向に傾斜させて取り付ける構成により、リング状カッターヘッドのローラビットにより破砕・切断された鉄筋、継輪を内径方向に取り込む作用が大きくなり、破砕、切断物の撤去・搬送作業がより容易になる。
リング状カッターヘッドを駆動手段により正逆回転可能とし、前記ローラビットの取り付け軸の内径側の端部をピン構造とし、外周側の端部を周方向に所定角度スライド可能な軸受けに取り付け、リング状カッターヘッドの回転方向の変更に応じてローラビットの取り付け軸の周方向の傾斜角度を変更可能とする構成により、リング状カッターヘッドの回転方向が一定であると、掘進機がローリングする恐れがあるため所定距離前進する毎にリング状カッターヘッドの回転方向を変更して掘進機のローリングを防止できる。その際、ローラビットの周方向の傾斜角度をリング状カッター方向の回転に伴う抵抗力により変更することにより、回転方向が変更しても破砕・切断された鉄筋、継輪を内径方向に取り込む作用を持続できる。
リング状カッターヘッドの駆動手段と前記山止め円筒部とを連結又は切り離し可能として、前記山止め円筒部を回転又は非回転とする構成により、掘進する地盤のＮ値が低い場合、山止め円筒部を非回転とし、地山を安定させて掘進でき、掘進する地盤のＮ値が通常又は大きい場合には、山止め円筒部を回転させて、効率良く地山を掘進できる。
山止め円筒部を前記リング状カッターヘッドに対して、掘進方向に伸縮可能とする構成により、周囲地盤の状況に応じて山止め円筒部の地盤への突出長さを調節でき、周囲地盤を安定させてリング状カッターヘッドによる既設コンクリート管破砕作業ができる。
以上 By attaching multiple roller bit mounting shafts so that the inner diameter end is positioned in the rotational direction and inclined in the circumferential direction, the rebars and joints crushed and cut by the roller bit of the ring-shaped cutter head The action to be taken in is increased, and crushing / removal of cut objects / transport work becomes easier.
The plurality of roller bit mounting shafts have an inner diameter end positioned on the rear side in the axial direction and inclined in the axial direction, and the plurality of roller bits mounting shafts are positioned on the inner diameter side end on the rotation direction side. The structure that is inclined and mounted in the circumferential direction increases the action of taking in the inner diameter direction of rebars and joints that have been crushed and cut by the roller bit of the ring-shaped cutter head, making it easier to crush and remove and transport the cut material. become.
The ring-shaped cutter head can be rotated forward and backward by driving means, the inner end of the roller bit mounting shaft has a pin structure, and the outer end is attached to a bearing that can slide a predetermined angle in the circumferential direction. If the rotation direction of the ring-shaped cutter head is constant, the excavator may roll if the rotation angle of the circumferential direction of the roller bit mounting shaft can be changed according to the change of the rotation direction of the cylindrical cutter head. Therefore, every time the vehicle advances a predetermined distance, the rotation direction of the ring-shaped cutter head can be changed to prevent the excavator from rolling. At that time, by changing the inclination angle of the roller bit in the circumferential direction by the resistance force accompanying the rotation in the ring cutter direction, the action of taking in the crushed and cut reinforcing bars and joints in the inner diameter direction even if the rotation direction changes Can be sustained.
When the driving means of the ring-shaped cutter head and the mountain retaining cylindrical portion can be connected or disconnected and the mountain retaining cylindrical portion is rotated or non-rotated, when the N value of the ground to be dug is low, the mountain retaining cylindrical portion When the N value of the ground to be excavated is normal or large, the ground stop can be rotated to efficiently excavate the natural ground.
With the configuration that allows the mountain retaining cylindrical part to be expanded and contracted with respect to the ring-shaped cutter head, the protruding length of the mountain retaining cylindrical part to the ground can be adjusted according to the surrounding ground conditions, and the surrounding ground is stable The existing concrete pipe can be crushed by the ring cutter head.
more than

本発明の実施の形態を図により説明する。図１、図２は、本発明の既設コンクリート管破砕用掘進機の第１実施形態を示す図である。   Embodiments of the present invention will be described with reference to the drawings. 1 and 2 are views showing a first embodiment of an existing concrete pipe crushing excavator according to the present invention.

既設コンクリート管破砕用掘進機は、地中に埋設された既設コンクリート管２の外径より大きな内径を有し、掘進機本体の前部には、既設コンクリート管２の破砕に必要な部分だけにカッターを設け、中央部に開口部５を形成したリング状カッターヘッド４を備える。リング状カッターヘッド４は、中央に作業員、資材、作業機及び破砕物の出入が可能な大きな開口部５を形成した面盤６を備え、面盤６に所定間隔毎にストレートタイプのローラビット７を、半径方向に伸びる取り付け軸１３に回転自在に取り付ける。   The existing concrete pipe crushing machine has an inner diameter larger than the outer diameter of the existing concrete pipe 2 buried in the ground, and only the part necessary for crushing the existing concrete pipe 2 is provided at the front of the excavator body. A cutter is provided, and a ring-shaped cutter head 4 having an opening 5 at the center is provided. The ring-shaped cutter head 4 includes a face plate 6 having a large opening 5 in the center where a worker, material, work machine, and crushed material can be taken in and out. A straight type roller bit 7 is provided in the face plate 6 at predetermined intervals. Are attached to a mounting shaft 13 extending in the radial direction in a freely rotatable manner.

リング状カッターヘッド４の後部に中央に開口を備えたバルクヘッド（図示せず）を配置する。バルクヘッドに、リング状カッターヘッド４を回転駆動する減速機構を備えた駆動手段１１を配置する。リング状カッターヘッド４は、先端には、超硬合金製のスリットカッター９を備えた山止め円筒部８内に配置される。山止め円筒部８は、地山からの土砂が掘進機本体内に浸入しないようにリング状カッターヘッド４の配置位置より前方に突出させる。   A bulkhead (not shown) having an opening at the center is disposed at the rear of the ring-shaped cutter head 4. The drive means 11 provided with the deceleration mechanism which rotationally drives the ring-shaped cutter head 4 is arrange | positioned at a bulk head. The ring-shaped cutter head 4 is disposed at the tip in a mountain stop cylindrical portion 8 provided with a slit cutter 9 made of cemented carbide. The mountain-clamping cylindrical portion 8 is protruded forward from the arrangement position of the ring-shaped cutter head 4 so that earth and sand from the natural ground does not enter the excavator main body.

本発明の第１実施形態においては、リング状カッターヘッド４を駆動する駆動手段１１と山止め円筒部８は連結され、リング状カッターヘッド４と山止め円筒部８は同時に同方向に回転する。   In the first embodiment of the present invention, the driving means 11 for driving the ring-shaped cutter head 4 and the mountain retaining cylindrical portion 8 are connected, and the ring-shaped cutter head 4 and the mountain retaining cylindrical portion 8 are simultaneously rotated in the same direction.

図２に示されるように、本発明の第１実施形態の既設コンクリート管破砕用掘進機のリング状カッターヘッド４は、ローラビット７の取り付け軸１３の内径側の端部を軸方向の後側に位置させ、径方向の垂直線に対して所定角度β°傾斜させて配置し、複数のローラビット７を円錐台状に配列する。軸方向の傾斜角度β°は、３〜４５°とする。ローラビット７の取り付け軸１３の軸方向の傾斜角度β°が３°以下、つまり半径方向の垂直線に近い角度になると、ローラビット７により破砕・切断された鉄筋、継輪が地山側に押し込まれ、回収撤去できなくなる。ローラビット７の軸方向の取り付け軸１３の傾斜角度β°が４５°以上であると、ローラビット７の破砕・切断力が低下する。上記構成によりローラビット７の破砕・切断能力を低下させることなく、切断・破砕物を内径側に取り込み撤去・搬送作業を容易とする。継輪を短く切断できない場合でも、内径側に取り込まれるので、前記開口部５から作業員、作業機械を搬入して、搬送・撤去可能な長さに切断する作業が容易にできる。   As shown in FIG. 2, the ring-shaped cutter head 4 of the existing concrete pipe crushing excavator according to the first embodiment of the present invention is configured such that the end on the inner diameter side of the mounting shaft 13 of the roller bit 7 is the rear side in the axial direction. The plurality of roller bits 7 are arranged in a truncated cone shape by being inclined at a predetermined angle β ° with respect to the radial vertical line. The axial inclination angle β ° is 3 to 45 °. When the axial inclination angle β ° of the mounting shaft 13 of the roller bit 7 is 3 ° or less, that is, an angle close to the vertical line in the radial direction, the reinforcing bars and the joints crushed and cut by the roller bit 7 are pushed into the ground. And cannot be recovered and removed. When the inclination angle β ° of the mounting shaft 13 in the axial direction of the roller bit 7 is 45 ° or more, the crushing / cutting force of the roller bit 7 is reduced. With the above-described configuration, the cut and crushed material is taken into the inner diameter side without reducing the crushing / cutting ability of the roller bit 7, thereby facilitating the removal / transport operation. Even when the joint ring cannot be cut short, it is taken into the inner diameter side, so that it is possible to easily carry in an operator and a work machine from the opening 5 and cut it to a length that can be transported and removed.

図３は、本発明の第２実施形態を示す図である。第２実施形態の既設コンクリート管破砕用掘進機のリング状カッターヘッド４は、ローラビット７の取り付け軸１３の内径側の端部の周方向の位置が回転方向側にずれるように配置し、半径方向に対してα°傾斜させて配置する。半径方向の傾斜角度α°は、３〜４５°である。半径方向の傾斜角度α°が３°以下であると、つまり、半径方向の傾斜角度が半径に近い角度になると、ローラビット７により破砕・切断された鉄筋、継輪が地山側に押し込まれ、回収撤去できなくなる。ローラビット７の半径方向の取り付け軸１３の傾斜角度α°が４５°以上であると、ローラビット７の破砕・切断力が低下する。上記構成によりローラビット７の破砕・切断能力を低下させることなく、切断・破砕物を内径側に取り込み撤去・搬送作業を容易とする。継輪が短く切断できない場合でも、内径側に取り込まれるので、前記開口部５から作業員、作業機械を搬入して、搬送・撤去可能な長さに切断する作業が容易にできる。   FIG. 3 is a diagram showing a second embodiment of the present invention. The ring-shaped cutter head 4 of the existing concrete pipe crushing excavator of the second embodiment is arranged so that the circumferential position of the inner diameter side end of the mounting shaft 13 of the roller bit 7 is shifted to the rotational direction side, and the radius Arranged at an angle of α ° with respect to the direction. The inclination angle α ° in the radial direction is 3 to 45 °. When the inclination angle α ° in the radial direction is 3 ° or less, that is, when the inclination angle in the radial direction becomes an angle close to the radius, the rebars and joints crushed and cut by the roller bit 7 are pushed into the ground, It cannot be recovered and removed. When the inclination angle α ° of the mounting shaft 13 in the radial direction of the roller bit 7 is 45 ° or more, the crushing / cutting force of the roller bit 7 is reduced. With the above-described configuration, the cut and crushed material is taken into the inner diameter side without reducing the crushing / cutting ability of the roller bit 7, thereby facilitating the removal / transport operation. Even when the joint ring is short and cannot be cut, it is taken into the inner diameter side, so that it is possible to easily carry in an operator and a work machine from the opening 5 and cut it to a length that can be conveyed and removed.

本発明の第３実施形態は、本発明の第１及び第２実施形態を組み合わせたものである。
つまり、本発明の第３実施形態の既設コンクリート管破砕用掘進機のリング状カッターヘッド４は、ローラビット７の取り付け軸１３の内径側の端部を軸方向の後側に位置させ、軸方向に所定角度β°傾斜させて配置し、且つ、ローラビット７の取り付け軸１３の内径側の端部の周方向の位置が回転方向側にずれるように配置し、半径方向に対してα°傾斜させて配置する。本発明の第３実施形態の構成により、ローラビット７の破砕・切断能力を低下させることなく、切断・破砕物を内径側に取り込み撤去。搬送作業を容易とする。 The third embodiment of the present invention is a combination of the first and second embodiments of the present invention.
That is, the ring-shaped cutter head 4 of the existing concrete pipe crushing excavator according to the third embodiment of the present invention positions the end portion on the inner diameter side of the mounting shaft 13 of the roller bit 7 on the rear side in the axial direction. Is inclined at a predetermined angle β °, and the circumferential position of the inner diameter side end of the mounting shaft 13 of the roller bit 7 is shifted to the rotational direction side, and is inclined by α ° with respect to the radial direction. Let them be arranged. With the configuration of the third embodiment of the present invention, the cut and crushed material is taken into the inner diameter side and removed without reducing the crushing and cutting ability of the roller bit 7. Makes the transportation work easier.

図４は、本発明の第４実施形態を示すものである。第４実施形態の既設コンクリート管破砕用掘進機は、第２、第３実施形態のローラビット７の取り付け軸１３を周方向に傾斜したものに適用するものである。これは、リング状カッターヘッド４を同一方向にのみ回転させて掘進を継続すると、掘進機自体がローリングし、掘進方向がずれてしまうことがあるため、リング状カッターヘッド４の回転方向を所定距離掘進毎に変更する必要がある。しかし、リング状カッターヘッド４の回転方向が変わると、ローラビット７の半径方向の傾斜角度α°の方向がそのままであると、切断・破砕物を地山側に押し込む作用が大きくなり
、切断・破砕物の撤去・搬送作業が困難となる問題が発生する。そのため、本発明の第４実施形態では、ローラビット７の内径側の端部をピン構造とし、外周側の端部を周方向に所定角度スライド可能な周方向軸受けに取り付け、リング状カッターヘッド４の回転方向の変更に伴う抵抗力により、取り付け軸１３の外周側の端部を周方向軸受けに沿って周方向にスライドさせ、ローラビット７の周方向の傾斜角度を変更する。周方向軸受けのそれぞれの端部には、取り付け軸１３の外周側の端部を係止する溝等を設ける。上記、構成により、掘進機のローリングを防止し、リング状カッターヘッド４の回転方向を変更しても、切断・破砕物の内径方向の取り込み作用を持続できる。 FIG. 4 shows a fourth embodiment of the present invention. The existing concrete tube crushing excavator of the fourth embodiment is applied to a roller bit 7 attachment shaft 13 of the second and third embodiments inclined in the circumferential direction. This is because when the ring cutter head 4 is rotated only in the same direction and the excavation is continued, the excavator itself rolls and the excavation direction may be shifted. Therefore, the rotation direction of the ring cutter head 4 is set to a predetermined distance. It is necessary to change every digging. However, if the direction of rotation of the ring-shaped cutter head 4 changes, if the direction of the inclination angle α ° in the radial direction of the roller bit 7 remains the same, the action of pushing the cut and crushed material toward the ground will increase, and the cutting and crushing will occur. There arises a problem that it becomes difficult to remove and transport objects. Therefore, in the fourth embodiment of the present invention, the end portion on the inner diameter side of the roller bit 7 has a pin structure, and the end portion on the outer periphery side is attached to a circumferential bearing that can slide by a predetermined angle in the circumferential direction. The end of the mounting shaft 13 on the outer peripheral side is slid in the circumferential direction along the circumferential bearing, and the circumferential inclination angle of the roller bit 7 is changed by the resistance force accompanying the change in the rotation direction. At each end of the circumferential bearing, a groove or the like for locking the outer end of the mounting shaft 13 is provided. With the configuration described above, rolling of the excavator can be prevented, and the action of taking the cut / crushed material in the inner diameter direction can be maintained even if the rotation direction of the ring-shaped cutter head 4 is changed.

既設コンクリート管破砕用掘進機で、地下埋設の既設コンクリート管２を破砕し、新設管を敷設していく際、硬質地盤や軟弱地盤が混在する場合が多い。自立姓のないＮ値の低い軟弱地盤では、山止め円筒部８に取り込んだ地盤は、山止め円筒部８が回転すると崩れて地山が安息角で安定できず、地山を乱してしまう。このような軟弱地盤では、山止め円筒部８を非回転とし、地山に貫入させた方が地山を安定させる。一方、地盤のＮ値の高い硬質地盤や玉石地盤では、先端に超硬合金製のスリットカッター９を備えた山止め円筒部８を回転させて掘進する必要がある。そのため、本発明の第５実施形態は、図５に示されるような構成を採用している。   When an existing concrete pipe crushing machine is used to crush an existing concrete pipe 2 buried underground and lay a new pipe, hard ground and soft ground are often mixed. In soft ground with a low N value and no self-supporting surname, the ground taken in the mountain retaining cylinder 8 will collapse when the mountain retaining cylinder 8 rotates, and the ground will not be stable at the angle of repose and will disturb the ground. . In such soft ground, it is more stable if the mountain retaining cylindrical portion 8 is non-rotated and penetrates into the natural ground. On the other hand, in a hard ground or a cobblestone ground having a high N value of the ground, it is necessary to dig by rotating the mountain stop cylindrical portion 8 provided with a slit cutter 9 made of cemented carbide at the tip. Therefore, the fifth embodiment of the present invention employs a configuration as shown in FIG.

図５に示されるように、リング状カッターヘッド４を駆動する駆動手段１１の外周先端に山止め円筒部８を支持するサポートリング５６を取り付ける。山止め円筒部８とサポートリング５６との間にはボールベアリング５４を配置し回転自在とし、ボールベアリング５４への土砂侵入防止のためのシール５３を両端に取り付ける。リング状カッターヘッド４を取り付けた面盤６の後部が駆動手段１１に取り付けボルト５８により固定され、リング状カッターヘッド４が回転駆動される。山止め円筒部８のリング状カッター４の配置位置に内径方向に伸びるブラケット５９が形成され、ブラケット５９に回転伝達ピン５５挿入用の孔を形成する。一方、リング状カッターヘッド４の面盤６にも、回転伝達ピン５５挿入用の孔を形成する。山止め円筒部８を回転する場合には、回転伝達ピン５５を、面盤６及びブラケット５９にそれぞれ形成した孔に手動又は油圧ジャッキ等の手段で遠隔操作により挿入し、リング状カッターヘッド４を介して駆動力を山止め円筒部８に伝達する。山止め円筒部８を非回転とする場合は、回転伝達ピン５５を、面盤６及びブラケット５９にそれぞれ形成した孔から手動又は油圧ジャッキ等の手段で遠隔操作により引き抜く。上記構成により、掘進する地盤状態に応じて山止め円筒部８を回転状態又は非回転状態にすることができ、掘進地盤の状態が変動しても掘進地盤を安定させて掘進できる。   As shown in FIG. 5, a support ring 56 that supports the mountain-clamping cylindrical portion 8 is attached to the outer peripheral tip of the driving means 11 that drives the ring-shaped cutter head 4. A ball bearing 54 is disposed between the mountain stop cylindrical portion 8 and the support ring 56 so as to be rotatable, and seals 53 for preventing soil and sand from entering the ball bearing 54 are attached to both ends. The rear portion of the face plate 6 to which the ring-shaped cutter head 4 is attached is fixed to the driving means 11 by the mounting bolt 58, and the ring-shaped cutter head 4 is rotationally driven. A bracket 59 extending in the inner diameter direction is formed at an arrangement position of the ring-shaped cutter 4 of the mountain stop cylindrical portion 8, and a hole for inserting the rotation transmission pin 55 is formed in the bracket 59. On the other hand, a hole for inserting the rotation transmission pin 55 is also formed in the face plate 6 of the ring-shaped cutter head 4. When rotating the mountain retaining cylindrical portion 8, the rotation transmitting pin 55 is inserted into holes formed in the face plate 6 and the bracket 59 by remote control by means of manual or hydraulic jacks, etc. The driving force is transmitted to the mountain-clamping cylindrical portion 8. When the mountain-clamping cylindrical portion 8 is not rotated, the rotation transmitting pin 55 is pulled out by a manual operation or a remote operation by means such as a hydraulic jack from holes formed in the face plate 6 and the bracket 59, respectively. According to the above configuration, the mountain retaining cylindrical portion 8 can be rotated or non-rotated according to the ground state to be excavated, and the excavated ground can be stably excavated even if the state of the excavated ground fluctuates.

図６は、本発明の第６実施形態を示すものである。本発明の第６実施形態は、第５実施形態の山止め円筒部８の回転・非回転機構を存続させ、周囲地盤５７の状態に応じて、自立性のないＮ値の低い軟弱地盤では、山止め円筒部８を非回転とし、かつ、山止め円筒部８のリング状カッターヘッド４に対する掘進方向への突出長さを長くし、地山への貫入長さを長くして地山を安定させる。地盤のＮ値の高い硬質地盤や玉石地盤では、山止め円筒部８のリング状カッターヘッド４に対する掘進方向への突出長さを短くして、先端に超硬合金製のスリットカッター９を備えた山止め円筒部８を回転させ掘進地盤を安定させて掘進する。   FIG. 6 shows a sixth embodiment of the present invention. In the sixth embodiment of the present invention, the rotation / non-rotation mechanism of the mountain stop cylindrical portion 8 of the fifth embodiment is continued, and depending on the state of the surrounding ground 57, in the soft ground having a low N value without self-supporting, Stabilize the natural ground by making the mountain stop cylindrical portion 8 non-rotating and increasing the protrusion length of the mountain stop cylindrical portion 8 in the digging direction with respect to the ring-shaped cutter head 4 and increasing the penetration length into the natural ground. Let In the hard ground or cobblestone ground with a high N value of the ground, the projecting length in the digging direction with respect to the ring-shaped cutter head 4 of the mountain stop cylindrical portion 8 is shortened, and a slit cutter 9 made of cemented carbide is provided at the tip. The mountain stop cylinder portion 8 is rotated to stabilize the excavation ground and excavate.

図６に示されるように、リング状カッターヘッド４を駆動する駆動手段１１の外周先端に山止め円筒部支持リング６５を支持するサポートリング５６を取り付ける。山止め円筒部支持リング６５とサポートリング５６との間にはボールベアリング５４を配置し回転自在とし、ボールベアリング５４への土砂侵入防止のためのシール５３を両端に取り付ける。山止め円筒部支持リング６５の先端部外周に山止め円筒部８を摺動可能に配置する。山止め円筒部支持リング６５の先端部には、軸方向に伸びる長孔６２が複数形成され、前記複数の長孔６２に山止め円筒部８の内周に固定された複数のスクリュウナット６３を摺動可能に位置させる。山止め円筒部支持リング６５に一端を固定されたスクリュジャッキ６４が、スクリュウナット６３と螺着され、面盤６に形成した作業孔に配置したキャップ６０を外し、工具等を介して六角ヘッド６１を介してスクリュウジャッキ６４を回転させることにより、スクリュウナット６３を前後進させ、山止め円筒部８をリング状カッターヘッド４に対して掘進方向に伸縮させる。山止め円筒部８の掘進方向への前後進は油圧ジャッキ等の駆動手段を用いても良い。山止め円筒部８を回転する場合には、回転伝達ピン５５を、面盤６及び山止め円筒部支持リング６５にそれぞれ形成した孔に手動又は油圧ジャッキ等の手段で遠隔操作により挿入し、駆動力を山止め円筒部８に伝達する。山止め円筒部８を非回転とする場合は、回転伝達ピン５５を、面盤６及び山止め円筒部支持リング６５にそれぞれ形成した孔から手動又は油圧ジャッキ等の手段で遠隔操作により引き抜く。上記構成により、掘進する地盤状態に応じて山止め円筒部８を回転状態又は非回転状態にすることができ、掘進地盤の状態が変動しても掘進地盤を安定させて掘進できる。   As shown in FIG. 6, a support ring 56 that supports a mountain-clamping cylindrical portion support ring 65 is attached to the outer peripheral tip of the driving means 11 that drives the ring-shaped cutter head 4. A ball bearing 54 is disposed between the mountain retaining cylindrical portion support ring 65 and the support ring 56 so as to be rotatable, and seals 53 for preventing intrusion of earth and sand into the ball bearing 54 are attached to both ends. The mountain retaining cylindrical portion 8 is slidably disposed on the outer periphery of the distal end portion of the mountain retaining cylindrical portion supporting ring 65. A plurality of elongated holes 62 extending in the axial direction are formed at the tip of the mountain retaining cylindrical portion support ring 65, and a plurality of screw nuts 63 fixed to the inner periphery of the mountain retaining cylindrical portion 8 in the plurality of elongated holes 62 are provided. Position it slidably. A screw jack 64, one end of which is fixed to the mountain retaining cylindrical portion support ring 65, is screwed to the screw nut 63, and the cap 60 disposed in the work hole formed in the face plate 6 is removed, and the hexagon head 61 is inserted through a tool or the like. , The screw nut 63 is moved forward and backward, and the mountain retaining cylindrical portion 8 is expanded and contracted with respect to the ring-shaped cutter head 4 in the digging direction. Driving means such as a hydraulic jack may be used to move the mountain stop cylindrical portion 8 back and forth in the digging direction. When rotating the mountain retaining cylindrical portion 8, the rotation transmitting pin 55 is inserted into the holes formed in the face plate 6 and the mountain retaining cylindrical portion supporting ring 65 by manual or remote operation by means such as a hydraulic jack and driven. The force is transmitted to the mountain stop cylindrical portion 8. When the mountain retaining cylindrical portion 8 is not rotated, the rotation transmitting pin 55 is pulled out manually or remotely by means such as a hydraulic jack from holes formed in the face plate 6 and the mountain retaining cylindrical portion supporting ring 65, respectively. According to the above configuration, the mountain retaining cylindrical portion 8 can be rotated or non-rotated according to the ground state to be excavated, and the excavated ground can be stably excavated even if the state of the excavated ground fluctuates.

本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention. 本発明の実施形態を示す図である。It is a figure which shows embodiment of this invention.

符号の説明Explanation of symbols

２：既設コンクリート管、４：リング状カッターヘッド、５：中央開口部、６：面盤、７：ローラビット、８：山止め円筒部、９：スリットカッター、１１：駆動手段、１３：取り付け軸、５３：シール、５４：ボールベアリング、５５：回転伝達ピン、５６：サポートリング、５７：地盤、５８：取り付けボルト、５９：ブラケット、６０：キャップ、
６１：六角ヘッド、６２：長孔、６３：スクリュウナット、６４：スクリュウジャッキ、６５：山止め円筒部支持リング 2: Existing concrete pipe, 4: Ring-shaped cutter head, 5: Center opening, 6: Face plate, 7: Roller bit, 8: Cylindrical cylindrical portion, 9: Slit cutter, 11: Driving means, 13: Mounting shaft 53: seal, 54: ball bearing, 55: rotation transmission pin, 56: support ring, 57: ground, 58: mounting bolt, 59: bracket, 60: cap,
61: Hexagon head, 62: Long hole, 63: Screw nut, 64: Screw jack, 65: Cylindrical cylindrical support ring

Claims (5)

既設コンクリート管破砕用掘進機において、径方向に伸びる取り付け軸に回転自在に取り付けられるローラビットを中央部に開口部が形成されるように複数リング状に配置し駆動手段により回転駆動するリング状カッターヘッドとし、前記リング状カッターヘッドを先端にスリットカッターを備えた山止め円筒部内に配置し、前記複数のローラビットの取り付け軸を内径側の端部が回転方向側に位置し周方向に傾斜させて取り付けることを特徴とする既設コンクリート管破砕用掘進機。   In an existing concrete pipe crushing excavator, a ring-shaped cutter in which a plurality of roller bits rotatably mounted on a radially extending mounting shaft are arranged in a ring shape so that an opening is formed in the center and is rotated by a driving means. The ring-shaped cutter head is disposed in a mountain-cylinder cylindrical portion provided with a slit cutter at the tip, and the attachment shafts of the plurality of roller bits are positioned on the rotational direction side and inclined in the circumferential direction. An excavator for crushing existing concrete pipes, characterized in that 既設コンクリート管破砕用掘進機において、径方向に伸びる取り付け軸に回転自在に取り付けられるローラビットを中央部に開口部が形成されるように複数リング状に配置し駆動手段により回転駆動するリング状カッターヘッドとし、前記複数のローラビットの取り付け軸を内径側の端部が軸方向の後側に位置し軸方向に傾斜させ、且つ、前記複数のローラビットの取り付け軸を内径側の端部が回転方向側に位置し周方向に傾斜させて取り付けることを特徴とする既設コンクリート管破砕用掘進機。   In an existing concrete pipe crushing excavator, a ring-shaped cutter in which a plurality of roller bits rotatably mounted on a radially extending mounting shaft are arranged in a ring shape so that an opening is formed in the center and is rotated by a driving means. The head has a plurality of roller bit mounting shafts with an inner diameter end positioned on the rear side in the axial direction and inclined in the axial direction, and the plurality of roller bit mounting shafts rotated on the inner diameter side end. An existing concrete pipe crushing excavator characterized by being attached to the direction side and inclined in the circumferential direction. 前記リング状カッターヘッドを駆動手段により正逆回転可能とし、前記ローラビットの取り付け軸の内径側の端部をピン構造とし、外周側の端部を周方向に所定角度スライド可能な周方向軸受けに取り付け、リング状カッターヘッドの回転方向の変更に応じてローラビットの取り付け軸の周方向の傾斜角度を変更可能とすることを特徴とする請求項１又は２に記載の既設コンクリート管破砕用掘進機。 The ring-shaped cutter head can be rotated forward and backward by driving means, the inner end of the roller bit mounting shaft has a pin structure, and the outer end is a circumferential bearing that can slide a predetermined angle in the circumferential direction. The existing concrete pipe crushing excavator according to claim 1 or 2 , characterized in that the inclination angle of the mounting shaft of the roller bit in the circumferential direction can be changed in accordance with the change in the rotation direction of the attachment and ring cutter head. . 前記リング状カッターヘッドの駆動手段と前記山止め円筒部とを連結又は切り離し可能として、前記山止め円筒部を回転又は非回転とすることを特徴とする請求項１〜３のいずれかに記載の既設コンクリート管破砕用掘進機。   The driving means of the ring-shaped cutter head and the mountain retaining cylindrical portion can be connected or disconnected, and the mountain retaining cylindrical portion is rotated or non-rotated. Existing concrete pipe crushing machine. 前記山止め円筒部を前記リング状カッターヘッドに対して、掘進方向に伸縮可能とすることを特徴とする請求項１〜４のいずれかに記載の既設コンクリート管破砕用掘進機。 The existing concrete pipe crushing excavator according to any one of claims 1 to 4 , wherein the mountain stopper cylindrical portion is extendable and contractible in the excavation direction with respect to the ring-shaped cutter head.
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