JPS6133933B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cutting steel pipe sheet piles driven into underwater ground or other ground at a predetermined level.

Conventionally, as a cutting device for steel pipe sheet piles, a rotary drive device is attached to a support frame fixed to the upper end of the main sheet pile, and the upper end of the drive shaft rotated by the rotary drive device is supported by a level adjustment device. , the drive shaft is suspended inside the main sheet pile pipe, a steady rest device that rotates with respect to the main sheet pile is installed in the middle of the drive shaft, and a grindstone rotated by a grindstone cutter drive device is attached to the lower end of the drive shaft. A structure has been proposed in which a cutting unit is connected, which includes a cutter, a disk cutter, and a hydraulic cylinder that moves the cutters forward and backward toward the peripheral wall of the main sheet pile.

However, in the case of the above-mentioned conventional cutting device, it is necessary to rotate the disk cutter, which requires a large torque during cutting, by a long drive shaft, so the drive shaft is long, heavy, and expensive, and a steady rest device is required. Since the cutting unit is rotated in contact with the peripheral wall of the sheet pile main pipe, the rotational resistance is large, and in the case of underwater cutting, the rotational resistance becomes even greater.Also, the cutting unit and the cutting unit are moved vertically after cutting the main sheet pile to adjust the level. Since the distance to the device is long, there is a problem in that the dimensional accuracy is poor when moving the grindstone cutter vertically to the sheet pile main cutting position using the level adjustment device.

The object of the present invention is to provide a steel pipe sheet pile cutting device that advantageously solves the above-mentioned problems.

Next, the present invention will be explained in detail using illustrated examples.

The drawing shows an embodiment of the present invention, in which a level adjustment drive device 15 consisting of a geared motor is installed in the center of a support frame 14 placed on the upper end of a main sheet pile 13 in a steel pipe sheet pile 12. The intermediate portion of a vertical level adjustment screw 16 is screwed into a female screw member (not shown) which is fixed and rotated by the drive device 15, and is fixed to the support frame 14 on both left and right sides of the drive device 15. A vertical guide rod 18 is slidably fitted into the vertical guide cylinder 17, and a hanging rope is attached to both left and right sides of the upper part of the support frame 14 for lifting and transporting the cutting device by a crane or the like. A hanging metal fitting 19 for locking etc. is fixed.

The lower ends of the screw rods 16 and the lower ends of each of the guide rods 18 are fixed to a hanging frame 20 disposed below the support frame 14, and the hanging frame 20
Four hydraulic cylinders 21 for clamping are arranged radially at the upper and lower parts of the closed casing 2 of the cutting device main body 1 arranged below the cutting device main body 1.
An upper clamping device 3 and a lower clamping device 4 equipped with the above are fixed, and the outer end of the ram 22 in the hydraulic cylinder 21 is pressed against the inner wall of the main sheet pile pipe 13.

A vertical drive shaft 5 is disposed centrally within the closed casing 2 and passes through the lower clamping device 4, and a driven gear 23 is provided in the middle of the drive shaft 5.
A sleeve 24 having a piston 25 fixed thereto is fitted and fixed, and a cylinder 26 having a piston 25 on its outer periphery is fitted rotatably and immovably in the axial direction via a bearing, and is further fixed inside the casing 2. Disc cutter drive device 10 consisting of a hydraulic motor
A drive gear 27 is fixed to the rotating shaft of the casing 2, and an intermediate transmission shaft (not shown) rotatably supported by the casing 2 has the drive gear 27 fixed to it.
7 and the intermediate driven gear 28 meshing with the driven gear 2
3 is fixed, and the drive shaft 5 is rotated at a reduced speed in the forward or reverse direction by the disc cutter drive device 10 via a gear transmission mechanism.

The cylindrical body 26 is slidably penetrated by a cylinder 30 fixed to the casing 2, and the cylindrical body 26
The piston 25 fixed to the cylinder 30
The cylinder 30 and the cylindrical body 26 with a piston fitted therein allow
A hydraulic cylinder 11 that moves the drive shaft up and down is configured.

A cutting section frame 31 is fixed to the lower end of the drive shaft 5, and two hydraulic cylinders 32 for moving the disk cutter are arranged at the same level in parallel and in a horizontal state at the upper part of the cutting section frame 31. cutter holding members 33 arranged and fixed in opposite directions and further connected to the ends of the piston rods in each of the hydraulic cylinders 32;
is slidably fitted into a horizontal guide member 34 fixed to the cutting section frame 31, and a horizontal disc cutter 6 is rotatably attached to the tip of the cutter holding member 33 by a vertical shaft 35. Furthermore, the cutter holding member 33 is divided into parts at which the bearings 36 are fitted, and assembled and connected with bolts.

Two disc-shaped first hydraulic cylinders 37 for moving cutters are arranged and fixed to the lower part of the cutting section frame 31 so as to be parallel to each other on the same level and in the same direction in a horizontal state. The ends of the piston rod in the first hydraulic cylinder 37 are connected to both ends of a support member 38, and at both ends of the support member 38, a second hydraulic cylinder 39 for moving the disc-shaped cutter is connected to the first liquid. Both ends of the disc-shaped cutter holding member 40, which is arranged and fixed in parallel with the pressure cylinder 37 and in the opposite direction, and further fixes the disc-shaped cutter drive device 7 from the hydraulic motor, are fixed to the cutting part frame 31. The second hydraulic cylinder 3 is slidably fitted into the horizontal guide member 41 .
The ends of the piston rod 9 are connected to both ends of a disc-shaped cutter holding member 40.

The disc-shaped cutter holding member 40 is provided with a disc-shaped cutter 8 made of a horizontal whetstone cutter or a metal circular saw.
A vertical support shaft 42 to which a vertical support shaft 42 is removably fixed is attached rotatably and immovably in the axial direction via a bearing, and a driven bevel gear 4 is fixed to the support shaft 42.
3 is meshed with a drive bevel gear 44 fixed to the rotating shaft of a disc-shaped cutter drive device 7, and a cutting unit 9 is constituted by the cutting section frame 31 and each member attached thereto.

The maximum movement stroke of the hydraulic cylinder 11 for vertically moving the drive shaft is set equal to the vertical distance between the disc cutter 6 and the disk cutter 8,
A slip ring 46 is fixed to the upper end of the drive shaft 5 and comes into contact with a power supply brush 45 fixed in the casing 2, and is also provided with a liquid supply swivel 47 and four electromagnetic on/off valves. Pressure fluid from a hydraulic unit (not shown) installed on the ground to which the solenoid valve device 48 is attached passes through the swivel 47, the solenoid valve device 48, and the liquid feeding path in the drive shaft 5 to each of the above. Sent to hydraulic cylinder and hydraulic motor. In addition, the control panel installed on the ground (not shown) and each electromagnetic on/off valve are brush 4.
5 and a slip ring 46,
Further, the hanging frame 20 and the upper part of the cutting device main body 1 are connected via flexible hanging members 49 such as a plurality of chains or wire ropes.

Next, the order of cutting the steel pipe sheet piles using the cutting device of the above embodiment will be explained.

First, before cutting, level adjustment drive device 15
A level adjustment device consisting of a female threaded member rotated by a threaded member and a threaded rod 16 screwed thereto is set in the middle of the adjustment stroke, and the hanging frame 20 is fixed by a hanging member 49 having a length corresponding to the planned cutting position.
and the cutting device main body 1, further connect a hydraulic hose to the swivel 47, and connect a control cable to the brush 45. The hoses and cables are connected at their connection ends, which are previously led through the casing 2 to the support frame 14 .

Next, after inserting the cutting device into the steel pipe sheet pile 12 to be cut and placing the support frame 14 on the upper end of the main sheet pile 13, the cutting device main body 1 and the cutting unit 9 are raised or lowered by the level adjustment device. The cutting device main body 1 is fixed to the sheet pile main pipe 13 by finely adjusting the level of the disk cutter 6, and then expanding the upper clamp device 3 and the lower clamp device 4 and crimping them against the pipe inner wall of the sheet pile main pipe 13. .

Next, in order to cut the sheet pile main pipe 13, the disk cutter 6 is pressed against the inner wall of the sheet pile main pipe 13, and the disk cutter drive device 10 is operated to cut the cutting unit 9 via the gear transmission mechanism and the drive shaft 5. The sheet pile main pipe 13 is cut by rotating forward and reverse for the required time. After completing the cutting of the main sheet pile 13, the disc cutter 6 is moved backward, and the hydraulic cylinder 11 for vertically moving the drive shaft is operated to cut the disc cutter 6 to a height equal to the vertical distance between the disc cutter 6 and the disk cutter 8. The cutting unit 9 is moved upward and the disc-shaped cutter 8 is placed at the same level as the sheet pile main cutting position.

Next, the rotational position of the drive shaft is detected by the disc-shaped cutter direction display device 52, and the disc-shaped cutter 8 is operated while checking it on the ground control panel.
0, the disc-shaped cutter driving device 7 is operated to rotate the disc-shaped cutter 8, and the disc-shaped cutter 8 is advanced toward one of the joints 50 to connect the joint. Cut 50.

After cutting one joint 50, the disc-shaped cutter 8 is moved backward to the inside of the sheet pile main pipe 13, and then the cutting unit 9 is rotated approximately 180 degrees, and the opposite joint 51 is cut as described above. do.

After completing the cutting of the joint 51 on the opposite side, the disc-shaped cutter 8 is moved backward to the inside of the main sheet pile 13, and then the upper clamp device 3 and the lower clamp device 4 are contracted, and the cutting device is lifted up to cut the steel pipe sheet pile. It will be removed from 12.

When carrying out this invention, as a clamp device for fixing the cutting device main body 1 to the pipe inner wall of the main sheet pile pipe, any structure other than that shown in the drawings may be used. Furthermore, if the hanging frame 20 and the cutting device main body 1 are connected via two or more hanging members 49, the cutting device main body 1 will not rotate freely relative to the support frame 14. By looking at the direction of the cutting device main body 1 relative to the sheet pile
The direction can be easily confirmed and understood above the sheet pile.

According to this invention, the upper clamp device 3 and the lower clamp device 4, which are crimped and fixed to the inner wall of the sheet pile main pipe, are fixed to the casing 2 of the cutting device main body 1 suspended in the sheet pile main pipe 13, and Since the cutting unit 9 is connected to the lower end of the drive shaft 5 penetrating downward from the inside of the casing 2, the length of the drive shaft 5 can be significantly shortened compared to the conventional cutting device. Therefore, it is possible to use a drive shaft 5 that has good workability, is small in weight and is inexpensive, and since it does not include a steady rest device that rotates in contact with the inner wall of the sheet pile main pipe 13, rotational resistance is reduced. Further, the drive shaft 5 can be inserted into the casing 2 with a disc cutter 6.
A hydraulic cylinder 11 for vertically moving the drive shaft is provided to move the drive shaft up and down by a height equal to the vertical interval of the disc cutter 8. After cutting the sheet pile main pipe 13 with the disc cutter 6, the hydraulic cylinder 11 to the cutting unit 9 via the drive shaft 5.
By moving the disc-shaped cutter 8 in the vertical direction, it is possible to quickly and accurately move the disc-shaped cutter 8 to the same level as the sheet pile main cutting section and cut the joint. Furthermore, since the distance between the cutting unit 9 and the lifting drive section consisting of a hydraulic cylinder 11 for vertically moving the cutting unit 9 after cutting the sheet pile main pipe is short, the vertical movement is shorter than that of the conventional cutting device. The dimensional accuracy is good, so accurate cutting can be performed, and the cutting device main body 1 is connected to the main sheet pile 13
Since it can be fixed at any position within the sheet pile main pipe 13, the cutting position can be set freely, and only the cutting device main body 1 supporting the cutting unit 9 needs to be suspended within the sheet pile main pipe 13 and fixed with a clamp device. So,
Effects such as good workability and convenient movement and transportation can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of a steel pipe sheet pile cutting device, and Fig. 2 is a side view of a steel pipe sheet pile cutting device.
The figure is a plan view showing an example of a steel pipe sheet pile, Figure 3 is a vertical side view of the main body of the cutting device, Figure 4 is a vertical side view showing an enlarged part of it, and Figure 5 is a partial vertical side view of the cutting unit. 6 is a front view of the disk cutter moving support device, FIG. 7 is a cross-sectional plan view thereof, FIG. 8 is a vertical cross-sectional side view of the disk cutter mounting portion, and FIG. 9 is a front view of the disc-shaped cutter moving support device. FIG. 10 is a cross-sectional plan view thereof. In the figure, 1 is the main body of the cutting device, 2 is the casing, 3 is the upper clamp device, 4 is the lower clamp device, 5 is the drive shaft, 6 is the disc cutter, 7 is the disk cutter drive device, and 8 is the disk cutter. , 9 is a cutting unit, 10 is a disk cutter drive device, 11
1 is a hydraulic cylinder for moving the drive shaft up and down, 12 is a steel pipe sheet pile, 13 is a main sheet pile, 14 is a support frame, 15
16 is a level adjustment screw, 17 is a guide cylinder, 18 is a guide rod, 20 is a hanging frame, 21 is a hydraulic cylinder for clamping, 31
32 is a cutting section frame, 32 is a hydraulic cylinder for moving a disc cutter, 33 is a cutter holding member, 34 is a guide member, 37 is a first hydraulic cylinder for moving a disc-shaped cutter, 38 is a support member, and 39 is a disc-shaped A second hydraulic cylinder for moving the cutter, 40 a disc-shaped cutter holding member, 41 a guide member, 45 a brush for electrification,
46 is a slip ring, 47 is a swivel for liquid feeding,
49 is a flexible hanging member, and 50 and 51 are joints.

Claims (1)

[Claims] 1. A cutting device main body that is suspended and inserted into the main pipe of the steel pipe sheet pile to be cut and fixed to the inner wall of the pipe at an arbitrary level, and a disc-shaped cutter such as a disk cutter for cutting the main sheet pile and a grindstone cutter for cutting the joint. In a steel pipe sheet pile cutting device equipped with a cutter, an upper clamp device 3 and a lower clamp device 4 that are crimped and fixed to the inner wall of the sheet pile main pipe are attached to a casing 2 of a cutting device main body 1 suspended in the main sheet pile pipe. A disk-shaped cutter 8 rotated by a disk-shaped cutter 6 and a disk-shaped cutter drive device 7 and each cutter are attached to the lower end of a drive shaft 5 that is fixed and penetrates downward from the inside of the casing 2, and each cutter is connected to a sheet pile main. A cutting unit 9 is connected to the casing 2 and includes a hydraulic cylinder that moves the cutting unit 9 forward and backward toward the pipe wall. A steel pipe sheet pile cutting device characterized by being provided with a hydraulic cylinder 11 for vertically moving a drive shaft that moves a disc cutter 6 and a disc cutter 8 by a height equal to the vertical distance.