JP2000337071A - Full-rotation type vertical shaft construction machine and method for constructing manhole using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manhole construction method capable of reducing the number of machines to be used and enhancing operational efficiency, and provide a full-rotation type vertical shaft construction machine for use therein. SOLUTION: This full-rotation type vertical shaft construction machine 50 comprises a full-rotation type jack mechanism 51 for gripping and placing a large-bore steel pipe 57 into the ground and a bucket mechanism 70 for crushing obstacles in the large-bore steel pipe and scooping up them along with earth and sand or the like, both of the mechanisms 51, 70 being mounted on a base 60 having a travel mechanism 94 on its lower surface. The bucket mechanism 70 can include a hanging support member 76 disposed on the base 60 in such a way as to be capable of rising and falling, an expandable bucket support member 10 oscillatably hung on the hanging support member 76, and a closable bucket 55 disposed at the lower end of the bucket support member 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a manhole.

[0002]

2. Description of the Related Art A manhole is constructed by removing a soil inside a steel pipe while driving a large-diameter steel pipe (57) into the ground. For driving the large-diameter steel pipe (57), a full-rotation vertical shaft construction machine (120) as shown in FIG. 11 is used. Full-rotation vertical shaft construction machine (120) is a device that is driven into the ground while rotating a large diameter steel pipe (57), and a rotary ring mechanism that grips and rotates the large diameter steel pipe (57) ( 52) and a full-rotation type jack mechanism (51) including a hydraulic jack (53) for pushing the ring mechanism (52) downward.

[0003] Many of the all-rotating shaft construction machines (120) are of a stationary type, and must be moved to a construction site by hanging them with a crane or by attaching them to a self-propelled base machine or the like. Also, when fine-tuning the steel pipe pile core,
Crane and base machine needed. Furthermore, since the all-rotation shaft construction machine (120) is not equipped with a bucket for digging a pit, a backhoe lamb shell (not shown) equipped with a separate bucket crushes or scoops up the soil inside the steel pipe. Needed.

[0004] In order to build a manhole, a full-rotation vertical shaft construction machine (120) shown in FIG.
Rough terrain crane (or base machine) that moves the inside of the work site, a backhoe that crushes obstacles inside the large-diameter steel pipe, scoops up with soil and digs a pit, a hydraulic backhoe that takes the top soil on the ground, a large-diameter steel pipe Terra crane for mounting the all-rotation type shaft construction machine (120), a diesel engine driven hydraulic unit for driving the all-rotation type jack mechanism (51), and a transportation method such as a dump truck that carries out the excavated earth and sand, etc. , A lot of equipment is required.

[0005]

The construction site is mainly a general road having a road width of about 3 meters. In such a construction site, it is difficult to move or arrange a large number of equipments, which causes a decrease in work efficiency and hinders traffic. Therefore, reduction of the number of equipment required for building manholes is required.

[0006] In order to reduce the number of equipment, it is also possible to use a single rough terrain crane to move the full-rotation shaft construction machine and attach the large-diameter steel pipe. However, the full-rotation shaft construction machine is designed to have a heavy weight in order to receive the reaction force when driving a large-diameter steel pipe on the ground, so a large rough terrain crane is required. However, there is a problem of height restrictions and the like, and if the construction site is narrow, it is very difficult to move and work.

An object of the present invention is to provide a method of constructing a manhole capable of reducing the number of equipment used and improving the working efficiency, and to provide a full-rotation vertical shaft construction machine used for the method.

[0008]

Means for Solving the Problems To solve the above problems, a full-rotation shaft construction machine (50) of the present invention comprises a base (60) having a traveling mechanism (94) on its lower surface, and a large-diameter shaft. Equipped with a full-rotation type jack mechanism (51) for holding a steel pipe (57) and placing it in the ground, and a bucket mechanism (70) for crushing obstacles inside a large-diameter steel pipe and scooping it together with earth and sand etc. It is.

The bucket mechanism (70) includes a suspending support member (76) provided on the base (60) so as to be able to undulate, and the suspending support member (76).
(76) swingably suspended and extendable and retractable bucket support member (10), and a bucket (55) disposed at the lower end of the bucket support member (10) and capable of opening and closing, can do.

[0010] The method for constructing a manhole of the present invention is as follows.
A step of moving the full-rotation shaft construction machine (50) to a desired construction site by a traveling mechanism (94) by self-propelling, and a step of attaching a large-diameter steel pipe (57) to the full-rotation jack mechanism (51); While driving the steel pipe (57) into the ground, the bucket mechanism
The step (70) includes a step of crushing an obstacle inside the large-diameter steel pipe and scooping the obstacle together with earth and sand or the like until a desired depth is reached.

[0011]

[Operation and effect] Since the all-rotation shaft construction machine (50) is a self-propelled type and is equipped with the all-rotation jack mechanism (51) and the bucket mechanism (70), the all-rotation shaft construction machine (50) Rough terrain cranes and base machines for moving 50) are no longer required, and backhaul lamb shells for mining are not required. Therefore, the number of equipments can be reduced, and the equipments can be moved and arranged at the construction site with a margin, the work efficiency can be improved, and traffic is hardly hindered.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the structure of a full-rotation shaft construction machine (50) according to the present invention will be described, and thereafter, a method of constructing a manhole using the full-rotation shaft construction machine (50) will be described. explain.

The all-rotation shaft construction machine (50) is shown in FIGS.
As shown in the figure, the traveling mechanism (94) is positioned before and after the substantially rectangular base (60).
With a fully-rotating jack mechanism (5
1) and a bucket mechanism (70).

At the center of the base (60), a through-hole (61) having a diameter larger than that of the large-diameter steel pipe (57) to be cast is formed in a direction perpendicular to the ground, and is provided with a fully rotating type. The jack mechanism (51) is provided at an upper peripheral portion of the through hole (61). The full-rotation jack mechanism (51) is composed of a rotary ring mechanism (52) that grips and rotates the large-diameter steel pipe (57) and a jack mechanism (53) that moves the rotary ring mechanism (52) up and down. The large-diameter steel pipe (57) is pressed down by the jack mechanism (53) while holding and rotating the large-diameter steel pipe (57) by the rotary ring mechanism (52). 57) is buried underground.

Slightly behind the center of the full-rotation type jack mechanism (51), a pair of short auxiliary struts (72) (72) is protruded on the left and right. At the upper end of each auxiliary column (72), a column (71) is pivotally supported (71a) so as to be rotatable from a state in which the column has fallen rearward to an upright state. The contact surface (72a) between the support (71) and the auxiliary support (72) is
It is inclined forward and downward from the pivot part (71a), and the strut (7
When 1) is erected vertically with respect to the base (60), the contact surfaces of the column (71) and the auxiliary column (72) come into contact with each other to prevent the column (71) from leaning forward. Behind each auxiliary column (72), an undulating cylinder (73) for raising and lowering the column (71) is provided, and one end of the undulating cylinder (73) is provided on the base (60) and the other end is provided. It is pivotally supported at the approximate center of the back of the column (71). Raising cylinder (73)
When the is extended, the column (71) stands and stands on the auxiliary column (72). Also, when the undulating cylinder (73) is retracted,
(71) leans backward.

The upper ends of the columns (71) and (71) are connected by a support rod (74). In addition, at the front center of the support rod (74),
It is possible to provide a fixing groove (not shown) for preventing the bucket mechanism (70) from being shaken and for fixing the bucket mechanism (70) at the time of storage.

The bucket mechanism (70) includes a suspension support member (76) that can be raised and lowered on the base (60), and the suspension support member (7).
6) A bucket support member (10) suspended swingably and expandable and contractable, and a bucket (55) provided at the lower end of the bucket support member (10) and capable of opening and closing.

The suspension support members (76), (76) are each composed of a long hydraulic cylinder device, and are provided one by one in front of each auxiliary column (72). The lower end of each suspension support member (76) is pivotally supported by the base (60) so as to be rotatable in the front-rear direction, and the upper ends of both suspension support members (76) (76) are , Connecting rod
(77).

In front of the suspension support member (76), a rotation cylinder (78) for rotating the suspension support member (76) from the vertically erected state to the forwardly inclined state is provided. I have. One end of the rotation cylinder (78) is pivotally supported by the base (60), and the other end is detachably supported by the suspension support member (76). Rotating cylinder (78) with the suspension support member (76) tilted forward
Is extended, the suspension support member (76) rises and falls. When the support rod (74) is raised and lowered to a substantially vertical state, it hits the receiving groove (75) of the support rod (74). Conversely, when the rotating cylinder (78) is contracted, the suspension support member (76) tilts forward.

The suspension support member (76) can be retracted and stored when moving or storing. To retract, the pivot between the rotating cylinder (78) and the suspension support member (76) is released, and the suspension support member (76) is connected to the support rod (74) of the column (71) with a wire or the like. To engage. In this state, raise and lower the cylinder (7
3) may be contracted, and the column (71) may be tilted rearward together with the suspension support member (76) (hereinafter referred to as a "retracted state"). In order to erect the suspension support member (76) vertically from the retracted state, the undulating cylinder (73) is extended and undulated with the support (71). With the suspension support member (76) raised and lowered, the rotating cylinder (78) is pivotally supported on the suspension support member (76), and the engaging means such as a wire is removed. (76) becomes possible to lean forward.

As shown in FIG. 3, a bucket supporting member (10) is suspended at the center of a connecting rod (77) connecting the hanging supporting members (76) (76) so as to be swingable in the front-rear direction. Lowered favored. The connecting rod (77) includes a rotating mechanism (80) for rotating the bucket support member (10) in a horizontal plane. The rotation mechanism (80)
A hydraulic motor (81) attached to the connecting rod (77) is provided, and the hydraulic motor (81) and the bucket support member (10) are connected via a speed reduction mechanism (82). When the hydraulic motor (81) is driven,
The bucket support member (10) rotates in a horizontal plane.

As shown in FIG. 3, the bucket support member (10) can be constituted by a double-acting hydraulic cylinder device, and has a base end rotatably suspended and supported by the connecting rod (77). At the end, a bucket (55) is provided so as to be openable and closable.
The opening and closing of the bucket (55) is performed over a pair of hydraulic cylinder devices (42) (42) provided at the tip of the bucket support member (10).

As shown in FIGS. 4 and 5, the bucket support member (10) has a piston (1) that slides inside the cylinder (16).
4), the piston is divided into a first working chamber (20) and a second working chamber (22), and the piston rod (12) is connected to the cylinder (16) on the second working chamber side.
Through the end of the A first oil feed hole (24) for supplying and discharging hydraulic oil to and from the first working chamber (20) is provided at an end of the first working chamber (hereinafter referred to as a "cylinder base end"). Side end
A second oil feed hole (26) for supplying and discharging hydraulic oil to and from the second working chamber (22) is opened at the (hereinafter referred to as "cylinder tip"). Cylinder
A cylindrical body (36) protrudes through the axis of the base inner surface piston rod (12) of (16), and slightly protrudes from the distal end of the cylinder (16). The first and second oil feed holes (2
4) A third oil supply hole (28) for supplying and discharging hydraulic oil to and from the cylinder (36) is provided independently of (26). Inside the piston rod (12), three independent cylindrical flow paths (34), (30), (32) are formed concentrically, and the inner flow path (34) is provided with a third oil feed hole (28). From the cylinder
It passes through the inside of (36) and has an opening (100) at the tip of the piston rod. The intermediate first flow path (30) communicates with the first working chamber (20) and the opening (101) at the tip of the piston rod. The outer second flow path (32) extends from the piston (14) to the opening (102) at the tip of the piston rod, and the second working chamber is provided on the piston side.
(22) and the hole (103). The first flow path (30) and the second flow path (32) are provided with a hydraulic cylinder device (42) for opening and closing the bucket (55) via the switching valve (44) (in FIGS. 4 and 5, the hydraulic cylinder device ( 42) shows only one group.). The third flow path (34) is connected to the switching valve (44), and switches the switching valve (44).

As the switching valve (44), a hydraulic pilot type switching valve can be exemplified. Desirably, an all-port block type switching valve in which all ports are closed at the neutral position is used. Since the third channel (34) is supplied and discharged with hydraulic oil independently of the first channel (30) and the second channel (32), the switching of the switching valve (44) is performed by the bucket support. This can be performed regardless of the operation of the double-acting hydraulic cylinder device of the member (10).
The switching valve (44) is connected to the first flow path (3, 3) as shown in FIGS.
(0) and the second flow path (32) are connected to the first and second ports (45) (4).
6) and a first opening / closing port (47) and a second opening / closing port (48) connected to the hydraulic cylinder devices (42) (42). The first opening / closing port (47) and the second opening / closing port (48) communicate with a hydraulic cylinder device (42) for opening and closing the bucket, and supplies and discharges hydraulic oil from the ports (47) and (48). Thereby, the hydraulic cylinder device (42) for opening and closing the bucket expands and contracts.

By switching the switching valve (44), the first flow path (30) communicates with the first opening / closing port (47), and the second flow path (32) communicates with the second opening / closing port (48). When the hydraulic pressure in the first flow path (30) is raised and the hydraulic pressure in the second flow path (32) is lowered (FIG.
), The working chamber (41a) on each head side of the hydraulic cylinder devices (42) (42) becomes high pressure, the hydraulic cylinder devices (42) (42) extend, and the bucket opens. On the other hand, when the pressure in the second flow path (32) is increased, the pressure in the rod-side working chamber (41b) is increased, the hydraulic cylinder device (42) contracts, and the bucket closes. Conversely, the first
The flow path (30) communicates with the second opening / closing port (48), and the second flow path (3
2) and the first opening / closing port (47) are communicated with each other to form the first flow path (30).
When the pressure is increased, the hydraulic cylinder devices (42) (42) shrink,
When the bucket (55) is closed and the second flow path (32) is set to a high pressure, the hydraulic cylinder device (42) is extended and the bucket (55) is opened.

As described above, by switching the switching valve (44) according to the operating oil pressure of the operating chambers (20) and (22) of the bucket support member (10), the expansion and contraction of the hydraulic cylinder devices (42) and (42) are performed. Can be performed, and the bucket (55) can be opened and closed. The hydraulic oil supplied to and discharged from the double-acting hydraulic cylinder device of the bucket support member (10) is used for the expansion and contraction of the hydraulic cylinder devices (42) and (42) for opening and closing the bucket, as described above.
There is no need to connect the hydraulic cylinder devices (42) (42) directly to the hydraulic unit with external piping. Hydraulic cylinder device (42) (42)
If the external piping is directly connected to the hydraulic unit, the external piping may be damaged or loose external piping may be entangled with the opening and closing of the bucket (55) and the expansion and contraction of the bucket support member (10). However, the above configuration does not cause these problems.

Next, the traveling mechanism (94) will be described.
Upper ends of the front and rear of the base (60) project forward and rearward, respectively, and as shown in FIG. 6, arms (84) are provided on the left and right of the lower surface of each overhang (62), respectively. It is pivoted in a plane substantially parallel to. A pivot hole (63) is formed on the lower surface of the overhang portion (62), and a pivot (84a) projecting upward from the base end of the arm (84) is pivotally supported in the pivot hole (63). Is done. The other end of the arm (84) includes a steering means (88) described later. Each arm (8
4) is provided with a travel width conversion means (83) that enables the arm (84) to swing in a horizontal plane. As the traveling width conversion means (83), for example, a worm gear (8) is attached to the pivot (84a) of the arm (84).
5), and a mechanism in which the gear (85) is rotated by a worm (87) connected to a hydraulic motor (86). When the hydraulic motor (86) is driven, the arm (84) swings in a horizontal plane about the pivot (84a) together with the gear (85). When the hydraulic motor (86) stops, the rotation of the worm (87) stops, and the arm (84) is positioned. The travel width conversion means (83) connects the arm (84) and the base (60) with a hydraulic cylinder device (not shown), and
2) The arm (84) may be swung by the expansion and contraction of (42).

The steering means (88) rotates each traveling mechanism (94) in a horizontal plane. As the steering means (88), the casing (8
Inside 9), rotating plate (90) at the upper end, bracket (93) at the lower end
Supports a rotating shaft (91) integrally fixed thereto, and pivotally supports the other end of a hydraulic cylinder device (92) whose one end is pivotally supported on an upper inner surface of the casing (89) at an eccentric position of the rotating plate (90). , Bracket (93)
And a mechanism in which a traveling mechanism (94) is connected.
When the hydraulic cylinder device (92) is expanded and contracted, the rotating plate (90) rotates, and the direction of the traveling mechanism (94) connected to the bracket (93) rotates in a horizontal plane. When the expansion and contraction of the hydraulic cylinder device (92) is stopped, the swing of the traveling mechanism (94) stops, and the traveling mechanism is stopped.
The steering angle of (94) is determined. In addition, steering means (88)
May be steered by a hydraulic motor or the like.

The crawler-type traveling mechanism (94) connected to the steering means (88) includes a sprocket (9) before and after a pair of frames (95) fixed to a bracket (93) of the steering means (88).
6) (97) is supported and one sprocket (96) is
5) A mechanism in which the sprockets (96) and (97) are rotatable by being connected to a hydraulic motor (98) disposed between them, and an endless track (99) is wound around the outer circumference of the sprockets (96) and (97) can be exemplified. When the hydraulic motor (98) is driven, the sprockets (96) and (97) rotate, and the endless track (99) orbits.

As described above, by disposing the traveling mechanism (94) on the all-rotational shaft construction machine (50), the all-rotational shaft construction machine (50) can move independently. No crane or base machine is required. In particular, if the arm (84) is swingable independently of the base (60) as in the above configuration, when the work site is narrow, the left and right traveling mechanisms (94 By rotating the arm (84) in the direction in which the) approaches, the amount of protrusion from the base (60) can be reduced, and the travel width can be reduced. In addition, the arm (84) is
If it protrudes to the outside of 0), the stability of the all-rotation type shaft construction machine (50) during running and working can be enhanced. Travel mechanism
(94) are swingably mounted on the arm (84) in a plane substantially parallel to the base (60), so that when each traveling mechanism (94) is driven in a desired direction, the The vertical shaft construction machine (50) can be moved in a predetermined direction. By appropriately adjusting the direction of the traveling mechanism (94), the full-rotation shaft construction machine (50) can be moved not only in the front-back direction but also in the left-right and diagonal directions, so that the fine adjustment of the pile core position is easily and accurately performed. I can do it.

A traveling mechanism is provided on the all-rotation shaft construction machine (50).
By deploying (94), all-rotation shaft construction machine (50)
Therefore, the reaction force generated when driving a large-diameter steel pipe can be received without placing a counterweight or the like.

For the construction of the manhole, a full-rotation vertical shaft construction machine (50) of the present invention, a hydraulic unit for operating the full-rotation vertical shaft construction machine (50), a hydraulic backhoe for removing the top soil on the ground, and a large-diameter steel pipe A transportation means (110) such as a rough terrain crane for attaching the (57) to the all-rotation shaft construction machine (50) and a dump truck for carrying out the excavated earth and sand is required.

Since the all-rotation shaft erection machine (50) is a self-propelled type, a large rough terrain crane for moving the all-rotation shaft erection machine is unnecessary as in the related art. Since the machine (50) is equipped with a bucket (55), a backhoe lamb shell is not required, so the number of equipment required for building manholes can be reduced.

A manhole is constructed by the following procedures using the above-mentioned respective equipments. The hydraulic backhoe scoops out the topsoil of the ground at the construction site. Next, the pillar
The traveling mechanism (94) is driven for the all-rotation shaft construction machine (50) (see FIG. 7) in which the (71) and the suspension support member (76) are in the retracted state, and is moved to a desired construction site. After that, the hydraulic unit is connected to the all-rotation shaft construction machine (50). Supply and discharge hydraulic oil from the hydraulic unit to the all-rotation shaft construction machine (50), extend the undulating cylinder (73), and support the strut (71) and the suspension support member (76).
The suspension support member (76) and the rotating cylinder (7
8) (see FIG. 8). At this time, with the bucket (55) opened, the switching valve (44) is kept at the neutral position.

In this state, the suspension support member (76) is extended.
(See Fig. 9), a large diameter steel pipe (5
7) is attached to the all-rotation type jack mechanism (51). Next,
The full-rotation jack mechanism (51) pushes the large-diameter steel pipe (57) into the ground while rotating it,
(10) is extended, and the underground obstacle is crushed by the bucket (55) (see FIG. 10). When the obstacle is not crushed well, the bucket (55) is rotated by the rotating mechanism (80), and the direction of the bucket (55) is slightly changed to perform crushing. By changing the direction of the bucket (55) and performing crushing again, crushing of obstacles can be performed reliably. In a state where the bucket (55) is pressed against the ground (the first flow path (30) is at a high pressure), hydraulic oil is supplied and discharged to the third flow path (34),
The switching valve (44) is switched to communicate the first flow path (30) with the first opening / closing port (47), and the second flow path (32) and the second opening / closing port (4).
8) communicate. As a result, the hydraulic cylinder devices (42) (42) for opening and closing the buckets extend, the bucket (55) closes, and scoops up dirt and crushed obstacles (see FIG. 10). Next,
The switching valve (44) is returned to the neutral position, the bucket support member (10) is reduced, and the bucket (55) is pulled upward.

Next, as shown by the two-dot chain line in FIG.
The rotary cylinder (78) is reduced (the second flow path (32) is at a high pressure), and the suspension support member (76) is tilted forward to
(55) is moved forward. When the bucket (55) is moved forward, a transportation means (110) such as a dump truck is moved below the bucket (55), and in this state, the switching valve (4
Switch 4) to 1st flow path (30) and 2nd opening / closing port (48)
And the second flow path (32) and the first opening / closing port (47). As a result, the hydraulic cylinder device for opening and closing the bucket
(42) (42) is reduced, the bucket (55) is opened, and the earth and sand in the bucket is loaded on the transportation means (110).

After discharging the earth and the like from the bucket, the switching valve (44) is switched to the neutral position, the rotating cylinder (78) is extended, and the suspension support members (76) (76) are again set upright. Set up
By repeating the above excavation work, large diameter steel pipe (57)
Is buried to a predetermined depth, and a manhole is constructed.

The description of the above embodiments is for the purpose of illustrating the present invention and should not be construed as limiting the invention described in the appended claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a side view of a full-rotation shaft construction machine according to the present invention.

FIG. 2 is a front view of the all-rotation shaft construction machine of the present invention.

FIG. 3 is an enlarged view of a bucket mechanism of the all-rotation shaft construction machine of the present invention.

FIG. 4 is a sectional view of a bucket support member.

FIG. 5 is a sectional view of a bucket support member.

FIG. 6 is a partial cross-sectional view of the traveling mechanism.

FIG. 7 is an explanatory view showing working steps of the all-rotation shaft construction machine.

FIG. 8 is an explanatory view showing operation steps of the all-rotation shaft construction machine.

FIG. 9 is an explanatory view showing working steps of the all-rotation shaft construction machine.

FIG. 10 is an explanatory view showing working steps of the all-rotation shaft construction machine.

FIG. 11 is a front view of a conventional all-rotation shaft construction machine.

[Explanation of symbols]

 (10) Bucket support member (42) Hydraulic cylinder device for opening and closing bucket (55) Bucket (50) Full-rotation vertical shaft construction machine (70) Bucket mechanism (94) Travel mechanism

Claims (6)

[Claims] An all-rotation vertical shaft construction machine for constructing a manhole by removing earth and sand inside a steel pipe while driving a large-diameter steel pipe (57) into the ground. ), A large diameter steel pipe (5
7) Full-rotation jack mechanism (51) for gripping and driving into the ground
And a bucket mechanism (70) for crushing obstacles inside the large-diameter steel pipe and scooping it together with earth and sand and the like. The bucket mechanism (70) includes a suspension support member (76) disposed on the base (60) so as to be able to undulate.
A bucket support member (10) that is swingably suspended from the suspension support member (76) and is extendable, and a bucket (55) that is provided at the lower end of the bucket support member (10) and that can be opened and closed. 2. The all-rotation shaft construction machine according to claim 1, further comprising: The bucket (55) is provided with a hydraulic cylinder device (42).
The bucket support member (10) is composed of a double-acting hydraulic cylinder device, and the base end of the cylinder (16) is connected to the suspension support member (76).
And a hydraulic cylinder device (42) (4) that opens and closes a bucket (55) at the tip of the piston rod (12).
A first working chamber (20) on the head side of a piston (14) that slides inside the cylinder (16), and a second working chamber (22) on the rod side. ), A first oil supply hole (24) communicating with the first working chamber (20) is opened at the head end.
A second oil feed hole communicating with the second working chamber (22) at the rod end
(26) was opened and the working chambers (20) (2)
Hydraulic oil is supplied / discharged to 2), and one end of the piston rod (12) communicates with the first working chamber (20), and the other end extends to near the tip of the piston rod (12). 1 flow path (30)
And a second flow path (32) having one end communicating with the second working chamber (22) and the other end extending to near the tip of the piston rod (12), and the first and second flow paths (30) ( 32) is connected to a bucket opening / closing hydraulic cylinder device (42) (42), and supplies hydraulic fluid to the first flow path (30) and the second flow path (32) to open / close the bucket. 3. The all-rotation vertical shaft construction machine according to claim 2, wherein the hydraulic cylinder devices (42) expand and contract to open and close the bucket (55). 4. A third flow path (34) penetrating through the axial center is opened in the piston rod (12), and the third flow path is formed inside the cylinder (16) from the base end on the head side. A cylindrical body (36) penetrating through the cylindrical body (34) protrudes, and the cylindrical body (36) is provided with a first and second flow paths from a third flow path (34) opened at the base end on the head side. (30)
Hydraulic oil is supplied and discharged independently of (32). Near the tip of the piston rod (12), a hydraulic pressure switchable by hydraulic oil supplied and discharged to the third flow path (34) is provided. A pilot type switching valve (44) is provided, and a first flow path (30) and a second flow path (32)
The all-rotation shaft construction machine according to claim 3, wherein the shaft is connected to a hydraulic cylinder device (42) for opening and closing the bucket via a switching valve (44). 5. A method for constructing a manhole using the all-rotation vertical shaft laying machine (50) according to any one of claims 1 to 4, wherein the traveling mechanism (94) drives the all-rotation vertical shaft builder. Moving the (50) by self-propelled to the desired construction location, attaching the large-diameter steel pipe (57) to the full-rotation jack mechanism (51), placing the large-diameter steel pipe (57) into the ground, Mechanism (70)
A step of crushing an obstacle inside the large-diameter steel pipe and scooping it together with earth and sand until a desired depth is reached. 6. A manhole by digging the inside of a steel pipe while casting a large-diameter steel pipe (57) into the ground, and carrying out earth and sand excavated by the digging from a construction site by a transportation means (110). And a rough terrain crane for attaching a large-diameter steel pipe (57) to the full-rotation vertical shaft construction machine according to any one of claims 1 to 4. A transportation means (110) for carrying out the excavated earth and sand is used, and after moving the all-rotation type shaft construction machine (50) by a traveling mechanism (94) to a desired construction site by self-propelled, a rough terrain crane is used. The large-diameter steel pipe (57) is attached to the full-rotation jack mechanism (51) of the full-rotation vertical shaft construction machine (50), and the large-diameter steel pipe (57) is driven into the ground by the full-rotation vertical shaft construction machine (50). While crushing obstacles inside the large-diameter steel pipe by the bucket mechanism (70) and scooping it together with earth and sand. Up, construction method manhole, characterized in that it includes a step of unloading mounted on conveying means (110).