JPH0423948Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Field of Industrial Application" The present invention relates to a device for cutting steel pipe sheet piles used in underwater quay structures, bridge pier erection work, reclamation work, etc. after completion of the construction.

``Prior Art'' Conventionally, as a device for cutting steel pipe sheet piles used for underwater quay structures, bridge pier erection work, reclamation work, etc. after completion of the construction, for example, push-cut disk cutters or grindstone cutters are suitable examples. It is known that rotating cutters are used alone or in combination.

For example, a cutting device capable of cutting both the steel pipe body (hereinafter referred to as the main body pipe part) and the joint (hereinafter referred to as the joint pipe part) of a steel pipe sheet pile using a grindstone cutter equipped with a revolution and rotation drive device was published in Japanese Patent Publication No. 50-32139. It is disclosed in the publication No.

Further, a cutting device incorporating a disk cutter and a grindstone cutter so as to cut a main body pipe portion with a disk cutter and then cut a joint pipe portion with a grindstone cutter is disclosed in, for example, Japanese Patent Publication No. 61-33933.

Further, a cutting device for cutting a main body pipe portion and a joint pipe portion using high pressure fluid using a water jet nozzle is disclosed in, for example, Japanese Patent Laid-Open No. 61-87020.

Furthermore, a cutting device that cuts the main body pipe portion with a disk-shaped cutter and then cuts the joint pipe portion using high-pressure fluid using a water jet nozzle is disclosed in, for example, JP-A-61.
-Disclosed in Publication No. 86122.

"Problems to be solved by the invention" The above-mentioned Japanese Patent Publication No. 50-32139 and Japanese Patent Publication No. 61, which cut the main body pipe or joint pipe with a whetstone cutter
In the technology disclosed in Publication No. 33933, the cutter blade itself is inserted into the main body pipe or joint pipe, and just before the cutting is completed, the cutter blade is stuck due to residual stress or the weight of the pipe. In order to become
There was a problem that the cutter was easily damaged, resulting in poor cutting costs and workability.

Furthermore, in the techniques of JP-A No. 61-87020 and JP-A-61-86122, the joint pipe section is cut from the inner surface of the main body pipe section using high-pressure fluid. As the distance from the nozzle mouth increases, cutting ability decreases and complete cutting becomes difficult.
Furthermore, cutting took a considerable amount of time, which caused problems in terms of cutting costs.

Furthermore, the above-mentioned Japanese Patent Publication No. 61-33933 and the above-mentioned Japanese Patent Application Laid-Open No. 61-1999 have different cutting means in the same device.
The technique disclosed in Japanese Patent No. 86122 has the problem that in addition to the problem of the cutter blade getting caught, it is also difficult to align the cutting lines of the two cutting means.

The present invention aims to solve such conventional problems.

"Means for Solving the Problems" The present invention provides a structure in which the lower end of the swing shaft is capable of raising and lowering in the axial direction of the swing shaft, and is capable of moving forward and backward in the direction orthogonal to the axis of the swing shaft. A horizontal grindstone cutter part and a vertical grindstone cutter part are provided so as to be able to control the rotation in the circumferential direction of the shaft, and the swing shaft is rotatably fitted loosely into a cylindrical casing, and the casing is attached to the outer circumference of the casing using a steel pipe sheet pile. This is a steel pipe sheet pile cutting device equipped with a holding means that can be fixed to the inner wall of the main body pipe section.

"Operation" After changing the height of the horizontal grindstone cutter part so that the height of the cutting line is above or below the cutting line when cutting the joint pipe part of the steel pipe sheet pile cut by the horizontal grindstone cutter part. , After cutting the main body pipe part of the steel pipe sheet pile in the circumferential direction all the way around, or in two places from the part that does not overlap in the vertical direction with the main pipe part cutting line when cutting the joint pipe part to the part that overlaps in the vertical direction at both ends. , it is possible to cut in the vertical direction between the cutting lines of different heights using the vertical grindstone cutter part, and it is possible to easily make a complete cut without using any means or work to match the heights of both cutting lines in the horizontal direction. By connecting the lines, complete cutting of the steel pipe sheet pile can always be achieved.

Further, the main body tube section serves as a support when cutting the joint tube section, and the joint tube section serves as a support when cutting the main body tube section, thereby eliminating the jamming of the cutter.

"Embodiment" An embodiment of the present invention will be described below based on the drawings.

In FIG. 1, the cutting device A of the present invention includes a casing 1, a holding means 2 for holding and fixing the casing 1 to the inner wall of the main body pipe section B of the steel pipe sheet pile, and a pivoting member loosely fitted in the casing 1 so as to be rotatable. A shaft 3, a horizontal shaft held so as to be controllable to move up and down in the axial direction of the swing shaft 3, to be controllable to move forward and backward in a direction perpendicular to the axis of the swing shaft 3, and to be controllable to swing in the circumferential direction of the swing shaft 3. It is composed of a grindstone cutter part 4 and a vertical grindstone cutter part 5.

The casing 1 is formed into a cylindrical shape, and a suitable hanger 6 is provided at the upper part of the casing 1.

The holding means 2 has abutting members 7 that can move forward and backward in a direction perpendicular to the axis of the casing 1 at a plurality of upper and lower positions in the outer circumferential direction of the casing 1 .

In this embodiment, each contact member 7 is driven by a contact hydraulic cylinder 8, and is arranged at three locations each on the upper and lower stages.

The swing shaft 3 is loosely fitted into a lift bearing 9 and a swing bearing 10 which are vertically arranged in the center of the casing 1, and a swing shaft lift hydraulic cylinder 11 which is arranged inside the casing 1. (also provided on the opposite side as shown in FIG. 2), is held so that it can be controlled in elevation and rotation by a guide bar 12, a rotation drive device 13, and each control device (not shown).

Note that the swing drive device 13 includes a motor 14,
It is composed of a pinion 15 and a gear 16.

The horizontal whetstone cutter portion 4 is shown in FIGS. 1 and 3.
As shown in the figure, the horizontal grindstone cutter 19 arranged in the slide box 18 is rotated so that the horizontal grindstone cutter 19 can be controlled to move forward and backward by the operation of the hydraulic cylinder 17 for advancing and retreating the horizontal grindstone cutter and a control device (not shown). The cutter is composed of a driving motor 20, and is connected to the lower end of the turning shaft 3 so that the cutter rotating shaft is perpendicular to the lower end of the turning shaft 3.

The vertical grindstone cutter section 5 is provided with a hydraulic cylinder 21 for advancing and retracting the vertical grindstone cutter, as shown in FIGS. 4 to 6.
and a vertical grindstone cutter 23 disposed on a slide plate 22 so as to be controllable forward and backward by the operation of a control device (not shown), and a motor 24 for rotationally driving the vertical grindstone cutter 23. The cutter is placed on 1a so that the axis of rotation of the cutter is horizontal.

Incidentally, the horizontal whetstone cutter 19 and the vertical whetstone cutter 23 may each have an arbitrary diameter, but it is preferable to use the horizontal whetstone cutter 19 with a large diameter and the vertical grindstone cutter 23 with a small diameter, as will be described later. I am feeling well.

Next, a typical usage example of the steel pipe sheet pile cutting device of the present invention will be explained.

First, the cutting device A, which is suspended by hanging a wire or the like from the hanging handle 6, is gradually inserted from the upper end of the main body tube B.
When the horizontal whetstone cutter 19 descends to the intended cutting position, each contact member 7 constituting the holding means 2 is pushed out by the contact hydraulic cylinder 8 and pressed against the inner wall of the main body tube B, thereby The cutting device A is fixed to the inner wall of the main body tube portion B and is maintained in that state until the cutting operation is completed.

Next, in order to cut one joint pipe part C,
Rotate the swing shaft 3 to swing the horizontal grindstone cutter 19 in a predetermined direction, operate the hydraulic cylinder 11 for lifting and lowering the swing shaft to adjust and fix the swing shaft 3 to a desired height, and rotate the horizontal grindstone cutter 19. Then, by operating the hydraulic cylinder 17 for advancing and retracting the horizontal grindstone cutter, the slide box 18 is pushed toward the inner wall of the main body tube B, the horizontal grindstone cutter 19 is brought close to the inner wall of the main body tube B, and then the main body tube B is cut. , and then cut the joint tube section C.

In addition, in order to perform cutting work accurately, it is preferable to adjust the swing shaft 3 using a swing position detector (not shown).

Once one joint pipe section C has been cut, move the horizontal grindstone cutter 19 backward and then turn the rotating shaft 3.
Rotate 180 degrees and move the horizontal grindstone cutter 19 forward to cut the other joint pipe portion C.

When the cutting of the joint pipe portion C is completed, the slide box 18 is returned and the horizontal grindstone cutter 19 is moved backward, and then the swing shaft 3 is raised and lowered by the operation of the hydraulic cylinder 11 for raising and lowering the swing shaft to raise and lower the height of the horizontal grindstone cutter 19. is fixed so as to be slightly above or below the height of the cutting line a of the joint pipe portion C as shown in FIGS. The slide box 18 is pushed out toward the inner wall of the main body tube section, the horizontal grindstone cutter 19 is advanced toward the inner wall of the main body tube section B, and the main body tube section B is cut in the circumferential direction while the rotating shaft 3 is rotated.

Note that the cutting in the circumferential direction is performed from the entire circumference of the main body tube section B or from a portion that does not overlap in the vertical direction with the cutting line a of the main body tube section B when cutting the joint tube section C to the ends of the cutting line a at both ends. (Figures 7 and 8
There are two locations b between α) in the figure and the vertically overlapping part (β in FIGS. 7 and 8).

When the cutting of the main body tube B in the circumferential direction is completed, the rotation of the turning shaft 3 is stopped and the slide box 18 is
, and stop the rotation of the horizontal grindstone cutter 19.

Next, the end α of the cutting line a by the horizontal grindstone cutter 19 and the cutting line b in the circumferential direction of the main body tube part B
In order to cut vertically between the gaps and communicate all the cutting lines, the hydraulic cylinder 11 for raising and lowering the rotating shaft is operated, and the height of the axis of the vertical grindstone cutter 23 is cut by the horizontal grindstone cutter 19. The height of the turning shaft 3 is adjusted and fixed so that it is approximately at the center of the height of the two-stage cutting lines a and b, and the vertical grindstone cutter 23 is rotated, and the hydraulic cylinder 21 for advancing and retreating the vertical grindstone cutter is rotated. The vertical grindstone cutter 23 is brought close to the inner wall of the main body tube part B by operation, and then the main body tube part B is cut in the vertical direction (d in FIG. 7).

If the same cutting operation is performed on the ends α of the four cutting lines, all the cutting lines will be connected, and the cutting of the steel pipe sheet pile will be completed.

Therefore, after returning the slide plate 22 and stopping the rotation of the vertical grindstone cutter 23 and restoring all operations to their original state, the cutting device A is moved to the main body tube section B.
Remove from.

In addition, although in this usage example, the joint pipe section is cut and then the main body pipe section is cut in the circumferential direction, this order may be reversed.

Next, an example will be described in which only the configuration of the horizontal grindstone cutter part is changed in the steel pipe sheet pile cutting apparatus described above.

It should be noted that the parts other than the horizontal grindstone cutter part are exactly the same as those described above, so the explanation will be omitted.

As shown in FIGS. 9 and 10, a motor 20 for rotationally driving a horizontal whetstone cutter 19 is mounted on the other end of a pedestal 26 whose one end is rotatably attached to a spindle 25 disposed on the inner wall of the casing 1. It is placed,
A horizontal whetstone cutter 19 is installed below the other end of the pedestal 26.
The cutter is vertically disposed via a restraining metal fitting 27 so that the cutter rotation axis is perpendicular.

The horizontal grindstone cutter 19 can be controlled to rotate around the support shaft 25 via the pedestal 26 by the operation of a horizontal grindstone cutter advance/retreat hydraulic cylinder 17 whose one end is fixed to the inner wall of the casing 1 and a control device (not shown). It is becoming.

The operation of the horizontal whetstone cutter section 4 configured as described above is not much different from the usage example in the embodiments already described, so the explanation will be omitted.
9 is characterized by its forward and backward movement not in a straight line but in a circular arc.

In each of the above embodiments, the hydraulic cylinder 11 for lifting and lowering the rotating shaft, the rotating drive device 13, the hydraulic cylinder 17 for advancing and retracting the horizontal grindstone cutter, the hydraulic cylinder 21 for advancing and retreating the vertical grindstone cutter, etc. are all controlled by known control means. It is possible to control each operation.

"Effects of the Invention" As described above, the steel pipe sheet pile cutting device of the present invention can efficiently cut both the main tube part and the joint pipe part, and can eliminate the problem of grindstone cutters getting caught.

In addition, in order to prevent grindstone cutters from getting caught, cutting devices that have a plurality of different cutting means in the same device always require raising and lowering one of the cutting means to perform precise positioning. The device cuts the main tube section and the joint tube section by changing the cutting height without exact alignment.
By cutting in the vertical direction between the two cutting lines and making all the cutting lines communicate with each other, cutting can be performed smoothly with extremely efficient and simple work, and the occurrence of incomplete cutting due to mismatching of the cutting lines can be completely prevented.

Furthermore, the device of the present invention can be equipped with a horizontal whetstone cutter with a large diameter close to the inner diameter of the main body tube, so even if the cutter is worn out due to cutting the joint tube from the inner wall of the main body tube, cutting operations can be carried out easily. It doesn't cause any trouble at all.

Furthermore, since the device of the present invention has a horizontal grindstone cutter and a vertical grindstone cutter provided at the lower end of the revolving shaft, it can be fixed without any trouble even in the main body pipe portion with a small inner diameter, and can efficiently cut steel pipe sheet piles.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a cutting device showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line X-X in Fig. 1, Fig. 3 is a front view of the horizontal grindstone cutter section, and Fig.
The figure is a partially cutaway perspective view of the vertical grindstone cutter part, FIG. 5 is a plan view of the same, FIG. 6 is a front view of the same, and FIG. 8 is an explanatory cross-sectional view taken along the Y-Y line in FIG. 7, FIG. 9 is an explanatory longitudinal cross-sectional view of a horizontal grindstone cutter portion in another embodiment of the present invention, and FIG. 10 is a plan view thereof. DESCRIPTION OF SYMBOLS 1...Casing, 2...Holding means, 3...Swivel shaft, 4...Horizontal grindstone cutter part, 5...Vertical grindstone cutter part, 7...Abutment member, 8...Hydraulic pressure cylinder for contact, DESCRIPTION OF SYMBOLS 11...Hydraulic pressure cylinder for lifting and lowering the swing shaft, 13...Swivel drive device, 17...Hydraulic pressure cylinder for advancing and retreating the horizontal grindstone cutter, 18...Slide box, 19...Horizontal grindstone cutter, 20...
Motor, 21... Hydraulic cylinder for advancing and retracting the vertical grindstone cutter, 22... Slide plate, 23... Vertical grindstone cutter, 24... Motor, 25... Support shaft, 2
6... Pedestal, 27... Holding metal fitting, A... Cutting device, B... Main tube section, C... Joint tube section, a... Cutting line when cutting the joint tube section, b... Main body tube section periphery Cutting line when cutting at two places in the direction, d... Vertical cutting line of the main body tube part, α... End of cutting line a, β
...End of cutting line b.

Claims (1)

[Scope of utility model registration request] A horizontal whetstone cutter part is provided at the lower end of the swing shaft so as to be able to move up and down in the axial direction of the swing shaft, to move forward and backward in a direction perpendicular to the axis of the swing shaft, and to control the swing in the circumferential direction of the swing shaft. and a vertical grindstone cutter portion, and the rotating shaft is rotatably fitted loosely into a cylindrical casing,
A steel pipe sheet pile cutting device, characterized in that a holding means for fixing the casing to the inner wall of the main body pipe portion of the steel pipe sheet pile is provided on the outer circumference of the casing.