JPH0629221Y2 - Steel pipe pile placing device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a steel pipe pile placing device for press-fitting into a ground while rotating a steel pipe pile for constructing a foundation pile of a structure.

(Prior Art) As a pile driver used to build foundation piles,
For example, as disclosed in Japanese Examined Patent Publication No. 62-34883, there is known one in which an auger machine is hung up and down on a leader vertically supported by a crawler crane. The auger machine in such a conventional pile driving machine clamps the upper end of a steel pipe pile (casing) fitted onto the earth auger and press-fits it in the axial direction while rotating and driving in the opposite direction to the earth auger. The steel pipe pile (casing) press-fitting means is assembled under the auger drive device.

(Problems to be solved by the invention) In the auger machine as described above, the upper end of the hoisting steel pipe pile must be fitted and clamped upward to the steel pipe pile press-fitting means on the lower side of the auger drive device, and therefore the steel pipe pile is required. Setting work is not easy, and moreover, the lower end of the steel pipe pile is built into the ground only after the steel pipe pile is lifted and set on the steel pipe pile press-fitting means, and the lower end of the steel pipe pile is built into the ground. There was a drawback that it took a long time.

(Means for Solving the Problems) In order to solve the above conventional problems, the present invention provides
A steel pipe pile press-fitting device and an auger drive device are supported by a leader rotatable around a vertical axis so that they can be moved up and down separately by shifting their positions in the circumferential direction of the leader, and the press-fitting device can be fixed at any height. A steel pipe pile that is composed of a suspended elevating body and a press-fitting device body suspended by a pushing cylinder unit on the elevating body, and clamps the outer peripheral surface of a steel pipe pile that vertically penetrates the press-fitting device body. A steel pipe pile rotation drive ring provided with a chuck and a drive unit for rotationally driving the ring are provided, and an upper end portion of the reader is provided with an arm rotatable about a vertical axis and extendable and contractible. The present invention proposes a steel pipe pile placing device that axially supports a guide sheave that guides a suspension line that suspends a steel pipe pile or the like at the end of an arm.

(Operation of device) When setting the steel pipe pile, with the steel pipe press-fitting device positioned near the lower end of the leader, the steel pipe pile is hung down from the tip guide sheave of the arm at the upper end of the leader. It is hoisted, but in this case,
Since the upper end of the leader is close to an existing object such as an elevated road and a long steel pipe pile cannot be used, the steel pipe pile to be used is the lower limit position of the body of the press-fitting device and the arm of the leader top end. When the steel pipe pile is shorter than the distance between them, the length of the arm is adjusted so that the tip guide sheave of the arm is located on or near the center axis of the press-fitting device, and the upper end of the steel pipe pile is located on the center line. You can hang it with stability. Further, when using the long steel pipe pile, the arm can be contracted so that the steel pipe pile and the arm do not interfere with each other, and the intermediate trunk portion of the steel pipe pile can be suspended by the suspension rope. Of course, in any case, the direction of the arm is adjusted so that the tip of the arm is located right above the press-fitting device.

The lower end of the steel pipe pile suspended by the suspension rope as described above is hung in the steel pipe pile rotation drive ring, and the lower end of the steel pipe pile is built in the ground by its own weight. In such a state, the steel pipe pile chuck is operated, the ring is rotationally driven to rotate the steel pipe pile around its axis, and the press-fitting device main body is pushed down by the cylinder unit for pushing down against the elevating body fixed to the leader. By forcibly lowering, the steel pipe pile can be pressed into the ground while rotating.
After press-fitting by the stroke of the push-down cylinder unit, the press-fitting cylinder unit is raised to the original level by the push-down cylinder unit with the steel pipe pile chuck released, and then the same press-fitting operation is performed again. Let

If the length of the steel pipe pile that can be used is short because the height of the working space is limited, repeat the above-described press-fitting operation of the steel pipe pile a required number of times to press one steel pipe pile to the required level. The next steel pipe pile is suspended in the same manner, welded to the upper end of the lower steel pipe pile, and the same press-fitting operation is performed again. In this way, the steel pipe pile is press-fitted into the ground.However, when it is difficult to press-fit the steel pipe pile by simply pushing it down while rotating it, the rotary press-fitting work of the steel pipe pile is interrupted and the press-fitting device is raised. After removing the steel pipe pile from the steel pipe pile, the leader is rotated to move the auger drive device to a position directly above the steel pipe pile. And the earth auger mounted on the auger drive device excavates the press-fitting planned location in the steel pipe pile and below the steel pipe pile.However, even when the earth auger is mounted on the auger drive device, the steel pipe pile The hanging rope used for hanging can be used for lifting the earth auger. Also in this case, the arm length and orientation can be adjusted so that the earth auger can be lifted most safely.

(Embodiment) An embodiment of the present invention will be described below with reference to the attached exemplary drawings.

In FIG. 1, reference numeral 1 denotes a pile driving barge, which is moored at a predetermined position and fixed by a fixing spat 2. Reference numeral 3 is a crawler crane that can be self-propelled on the berth 1, and a leader 10 is supported vertically.

The leader 10 is divided into a lower half 11 and an upper half 12 as shown in FIG.
Includes a lower support member 13 directly supported by the crawler crane 3 and an upper support member 15 supported by the crawler crane 3 via a pair of left and right back stays 14 so that both upper and lower ends thereof are rotatable about a vertical axis. The upper half portion 12 of the leader is supported so that the lower half portion 11 of the leader can be laid down on the crawler crane 3 side as shown in phantom in FIG.
A support shaft 16 is pivotally attached to the upper end of the, and a fall and erect operation cylinder unit 17 is interposed between the crawler crane 3 and the crawler crane 3. The lower end of the leader upper half 12 which is switched from the lying posture to the standing posture by the cylinder unit 17 is flange-connected to the upper end of the leader lower half 11 by a bolt nut.

As shown in FIGS. 2, 3 and 5, the leader 10 has a steel pipe pile press-fitting device 18 and an auger drive device 19 attached thereto.
And 90 are phase-shifted by 90 degrees in the circumferential direction of the leader and are respectively supported by guide rails 20 and 21 so as to be vertically movable. An arm having a guide sheave 23 for guiding the hoisting line 22 of the steel pipe pile press-fitting device 18 is provided at the upper end of the leader 10 (upper end of the upper half 12 of the leader), as shown in FIGS. 24, and an arm 27 having a guide sheave 26 for guiding the hoisting rope 25 of the auger drive device 19.
And are fixedly projected.

Further, extendable arms 30 having guide sheaves 29a, 29b for guiding the suspension rope 28 at both ends are attached to the upper sides of the arms 24, 27. This arm 30
As shown in FIGS. 11 to 13, a cylindrical support shaft 61 is rotatably supported on the upper end of the leader 10 about a vertical axis.
An arm base portion 62 fixed horizontally to the upper side, and an extendable arm portion 6 which is fitted in the arm base portion 62 so as to be able to move in and out and is made to extend and retract by a cylinder unit 63.
4 and the guide sheaves 29a and 29b are provided at the rear end of the arm base 62 and the tip of the telescopic arm 64.
Is pivotally supported. Reference numeral 65 denotes a lock means for fixing the orientation of the arm 30, which is supported by a bearing stand 66 on the leader side for supporting the cylindrical support shaft 61 so as to be able to move up and down and is biased by a spring 67 so as to project upward. It is composed of pins 68 and lock holes 70 provided at equal intervals around the substrate 69 on the side of the tubular support shaft 61. By fitting the lock pins 68 into one of the lock holes 70, The arm 30 is locked so that it cannot rotate. Although the lock pin 68 is remotely pulled down from below by an operation cord or the like connected to the lock pin 68, the lock pin 68 may be driven up and down by an actuator such as a cylinder unit or a solenoid.

As described above, the leader 10 is rotatable about the vertical axis with respect to the pair of upper and lower bearing members 13, 15, and as a means for rotating the leader 10, for example, as shown in FIG. , The arm 31 protruding from the leader 10 (lower half 11 of the leader) and the crawler crane 3
Cylinder unit 32 is interposed between and, and by pushing and pulling the cylinder unit 32, the reader 10 can be rotated 90 degrees forward and backward around the vertical axis. When the leader 10 is rotated in this manner, the cylinder unit 17 for vertically tilting and swinging the upper half 12 of the leader is used.
Is uncoupled from the leader upper half portion 12 and removed, and at the lower end of the leader 10, a pair of left and right fixing grounding legs for fixation are provided as shown in FIG. 2, FIG. 3 and FIG. Three
3 and the base 3 provided with the press-fitting device pulling guide sheave 35
6 is attached.

As shown in FIGS. 7 to 9, the steel pipe pile press-fitting device 18 includes an elevating body 38 suspended from the elevating rope 22 via a guide sheave 37, and a pair of left and right pushing cylinders for the elevating body 38. A steel pipe pile rotation drive ring 41 supported by a press-fitting device main body 40 suspended via a unit 39, which is rotatably supported around a vertical axis, and the ring 41. A pair of left and right drive units 42 that rotate and drive the ring 4.
A steel pipe pile chuck 43 is provided below the first pipe pile 1. The drive unit 42 connects the steel pipe pile rotation drive ring 41 to a motor 47 via a large gear 44 concentrically connected to the outer periphery of the ring 41, a small gear 45 meshing with the large gear 44, and a speed reducer 46. The steel pipe pile chuck 43 includes a plurality of wedge-shaped chuck pieces 49 connected to the rings 41 at positions at equal intervals in the circumferential direction via links 48, and a plurality of the wedge-shaped chuck pieces 49.
An elevating ring 51 that rotatably supports a ring-shaped cam 50 that is fitted onto the ring 41 at a concentric position with the ring 41, a plurality of elevating guides 52 in the circumferential direction that guides the elevating ring 51 only ascending and descending, and the elevating ring 51. It is composed of a plurality of circumferential cylinder units 53 for vertically driving. Therefore, when the lifting ring 51 is pulled up by each cylinder unit 53, each chuck piece 4 is moved by the ring-shaped cam 50 that rises integrally with the lifting ring 51.
9 moves closer to the axis of rotation of the steel pipe pile rotation driving ring 41, and the outer peripheral surface of the steel pipe pile penetrating the inside of the ring 41 can be automatically centered and clamped. On the other hand, when the steel pipe pile rotation drive ring 41 rotates, the link 4
8, the chuck piece 49, and the ring-shaped cam 50 rotate integrally, so if the steel pipe pile rotation drive ring 41 is rotationally driven by the drive unit 42, the steel pipe piles clamped by the steel pipe pile chuck 43 are integrated. It can be driven to rotate.

On the upper side of the press-fitting device main body 40, a steel pipe pile suspending guide 54 having a substantially U-shaped cross-section whose front side is opened is provided so as to project along the inner peripheral surface of the steel pipe pile rotation driving ring 41. There is. Of course, an arcuate notch 55 is also formed on the front surface of the elevating body 38 along the inner peripheral surface of the steel pipe pile suspending guide 54.

As shown in FIGS. 9 and 10, the steel pipe pile press-fitting device 1
8, a plurality of guide sheaves 35 pivotally supported by the base 36 and a plurality of guide sheaves 56 pivotally supported by the elevator 38. The press-fitting device pulling wire 57 is wound and stretched from the side of the base 36 by using the and.

When performing the steel pipe pile driving work using the pile driving machine configured as described above, the pile driving barge 1 moored at a predetermined position and fixed by the fixing spat 2 as shown in FIG. Above, the leader upper half 12 of the crawler crane 3 is erected and coupled to the leader lower half 11, and the leader 10 is assembled. In other words, when the pontoon 1 is towed, the upper half 12 of the leader 10 can be laid down to keep the overall height low, so that the height such as a gate-shaped or T-shaped bridge pier supporting an elevated road can be lowered. It is not necessary to remove the entire leader 10 from the crawler crane 3 even when passing through a restricted place.

Next, as shown in FIG. 2, the steel pipe pile press-in device 18 suspends the steel pipe pile in a state where the steel pipe pile press-fitting device 18 is at the lower limit position. However, an existing object such as an elevated road approaches the upper end (arm 30) of the leader 10. However, when the working space cannot be secured above the upper end of the leader 10, the press-fitting device 18 at the lower limit position is used.
When a steel pipe pile 59 that is appropriately shorter than the distance between the main body 40 and the arm 30 is used and a working space can be secured above the upper end of the leader 10, as shown by the phantom line, from the steel pipe pile 59. Also, a long steel pipe pile 59 'is used.
When the steel pipe pile 59 is used, the telescopic arm portion 64 of the arm 30 is advanced by the cylinder unit 63, and the guide sheave 29a at the tip is moved to the center of the steel pipe pile rotation drive ring 41 in the steel pipe pile press-fitting device 18. Suspension cord 2 that is positioned on or near the axis and hangs from the guide sheave 29a.
8 makes it possible to suspend the upper end of the steel pipe pile 59 at the axial center position. When the long steel pipe pile 59 'is used,
As shown by the phantom line, the telescopic arm portion 64 of the arm 30 is contracted to the retracted limit position by the cylinder unit 63 to prevent the guide sheave 29a at the tip and the steel pipe pile 59 'from interfering with each other. The body of the steel pipe pile 59 '(a position closer to the upper end than the central position in the length direction) may be suspended. Of course, when suspending the steel pipe pile 59 or 59 'in this manner, the lock pin 68 of the arm clock means 65 is disengaged from the lock hole 70 to free the arm 30, and the tip guide sheave of the arm 30 is freed. After adjusting the direction of the arm 30 by pulling the suspension rope 28 or the like so that 29a is located right above the press-fitting device 18,
The arm 30 is fixed by fitting the lock pin 68 into the lock hole 70.

The steel pipe pile 59 or 59 '(hereinafter, "or 59'" is omitted) is lifted right above the press-fitting device 18 by winding the hanging rope 28 with a winch on the crawler crane 3 side. It is not necessary to lift the lower end of the steel pipe pile 59 to a position above the upper end of the steel pipe pile suspending guide 54 of the press-fitting device 18, and as shown by phantom lines in FIGS. 2 and 9, respectively, Is slightly higher than the press-fitting device main body 40, the steel pipe pile suspending guide 54 is made to laterally enter from the front release portion, and the lower peripheral surface of the steel pipe pile 59 is brought into contact with the inner peripheral surface of the guide 54. Thus, the steel pipe pile 59 can be positioned directly above the steel pipe pile rotation drive ring 41.

On the other hand, since the steel pipe pile press-fitting device 18 is positioned right above the pile driving position, if the steel pipe pile 59 is lifted as described above, the hanging rope 28 is fed out to lower the steel pipe pile 59, and the steel pipe pile 59 is lowered. It can pass through the inside of the rotation driving ring 41 and the inside of the steel pipe pile chuck 43 and can be vertically built in the ground by its own weight.

Next, the steel pipe pile 59 is press-fitted into the ground using the press-fitting device 18, and the method is performed as follows. That is, the hoisting line 22 suspending the press-fitting device 18 is operated by the winch on the side of the crawler crane 3 to raise the press-fitting device 18 by an appropriate distance, and then the steel pipe pile chuck 43 is operated to operate the steel pipe as shown in FIG. With the pile 59 clamped to the press-fitting device main body 40, the press-fitting device main body 40 is pushed down against the elevating body 38 by the pushing-down cylinder unit 39.
At this time, the press-fitting device pulling line 57 is pulled by the winch on the side of the crawler crane 3 and is in a tension state, and prevents the lifting / lowering body 38 from moving upward. It is pushed down together with the steel pipe pile 59. On the other hand, by operating the motor 47 of the drive unit 42 to rotationally drive the steel pipe pile rotation driving ring 41, the steel pipe pile 59 clamped by each chuck piece 49 of the steel pipe pile chuck 43 is driven to rotate the steel pipe pile. It will rotate integrally with the working ring 41 about the vertical axis.

As described above, the steel pipe pile 59 is rotated by the drive unit 42, the steel pipe pile rotation drive ring 41, and the steel pipe pile chuck 43, and the press-fitting device body 40 is pushed down by the pushing-down cylinder unit 39, whereby the steel pipe pile 59 is grounded. Although it can be vertically press-fitted into the inside, the upward reaction force at this time is transmitted to the front end portion of the crawler crane 3 via the elevating body 38, the press-fitting device pull line 57, the base 36, and the leader 10. And is received by the weight of the crawler crane 3.

When the press-fitting for the stroke of the pushing-down cylinder unit 39 is completed, the steel pipe pile clamp by the steel pipe pile chuck 43 is released (the lifting ring 51 is pushed down by the cylinder unit 53), and then the pushing-down cylinder unit 39 is contracted to press-fit the device. Main body 40 is steel pipe pile 5
After returning to the initial position close to the elevating body 38 by ascending with respect to 9, the rotary press-fitting operation of the steel pipe pile 59 is performed again as described above. Hereinafter, by repeating the rotary press-fitting operation of the steel pipe pile 59, the steel pipe pile 59 can be press-fitted into the ground to a depth where the upper end of the steel pipe pile 59 reaches the welding connection work level with the next steel pipe pile.

As shown in FIG. 1, when the first steel pipe pile 59A has been press-fitted, the next steel pipe pile 59B is suspended just above the lower steel pipe pile 59A in the above-described manner. Then, the butt ends of the two steel pipe piles 59A and 59B are connected and integrated by welding. After that, the steel pipe pile rotary press-fitting operation by the press-fitting device 18 is performed in the same manner as described above, so that both steel pipe piles 59A and 59B can be integrally press-fitted into the ground.

As described above, a plurality of steel pipe piles 59 are sequentially added while being press-fitted, but when the required number of steel pipe piles 59 are added and press-fitted, the lower end steel pipe pile 59A reaches the hard ground and further press-fitting becomes difficult. If so, the steel pipe pile clamp by the steel pipe pile chuck 43 is released, and the entire press-fitting device 18 is lifted by the hoisting rope 22 to be disengaged upward from the upper end of the upper end steel pipe pile 59, as shown in FIG. The cylinder unit 32 allows the reader 10 to move 90 around the vertical axis.
3 degrees, and as shown in Fig. 3, the steel pipe pile press-fitting device 18
Instead of that, the auger drive device 19 is located at the pile driving position. The press-fitting device 18 is not shown in FIG. However, the auger drive device 19 has a reader 10
The earth auger 60, which can be expanded and contracted in a state of being lifted to the upper end position of, is set in a contracted state. Even when the earth auger 60 is attached to the auger drive device 19, the suspension rope 28 used when suspending the steel pipe pile 59 can be used. In this case, the direction of the arm 30 is adjusted and locked in the above-described manner so that the tip guide sheave 29a of the arm 30 is located right above the auger drive device 19, and the arm 30 is moved as shown in FIG. The tip guide sheave 29a of the auger drive device 19
The expansion / contraction arm portion 64 may be advanced by the cylinder unit 63 so as to be located on or near the central axis of the.

As described above, the earth auger 6 is attached to the auger drive device 19.
If 0 is set in the contracted state, the earth auger 60 is extended, and while the earth auger 60 is rotationally driven in the excavating direction, the hoisting rope 25 is extended from the winch on the side of the crawler crane 3 to drive the auger drive device 1.
9 is lowered, and the inside of the steel pipe pile 59 is excavated by the earth auger 60 until the auger drive device 19 reaches the lower limit position. When the auger drive device 19 reaches the lower limit position,
In a state where the auger drive device 19 and the earth auger 60 are separated from each other, the auger 25 is used to raise the auger drive device 19 to the upper limit position, and the auger drive device 19 and the earth auger 60 are connected to each other by the relay rod and then again The earth auger 60 excavates as described above.

Earth auger 60, which is sequentially extended by the intermediate rod
After excavating to the lower level of the foundation pile, disconnect the earth auger 60 from the auger drive device 19,
After the auger drive device 19 is raised by the hoisting rope 25, the leader 10 is reversely rotated by 90 degrees again, and instead of the auger drive device 19, the steel pipe pile press-fitting device 18 is returned to the pile driving position. After that, the next steel pipe pile 59 is suspended again in the above-mentioned manner, and the butt ends of the lower steel pipe pile 59 are connected and integrated by welding.
The entire steel pipe pile 59 connected by is rotationally press-fitted integrally.

When the required number of steel pipe piles 59 have been added and press-fitted, the leader 10 is rotated 90 degrees again to position the auger drive device 19 at the pile driving position, and the earth auger 60 remaining in the steel pipe piles 59 is retained. The upper end of the auger drive device 19 is connected to the auger drive device 19, and the auger drive device 19 rotates the earth auger 60 in the reverse direction.
The earth auger 60 is pulled out from the inside of the steel pipe pile 59 by moving upwards. At this time, the mortar is poured out from the tip through the shaft rod of the earth auger 60 to harden the soil inside the steel pipe pile 59 with the mortar to form the foundation pile. Can be built.

Also, the earth auger 60 or the earth auger 6
In order to construct a foundation pile by discharging earth and sand in the steel pipe pile 59 with a graph for earth removal attached to the auger drive device 19 instead of 0, inserting a reinforcing bar cage into the steel pipe pile 59, and placing concrete. You can also In this case, the steel pipe pile 59 can be used as a casing for concrete formwork, and the steel pipe pile 59 can be pulled out by using the press-fitting device 18 after the concrete is placed.

In addition, in the said Example, the raising / lowering body 38 of the steel pipe pile press-fitting apparatus 18 is carried out.
Ascending / descending rope 22 and pulling rope 5 as means for fixing the rope at an arbitrary height
7 is used, a chuck for fixing the elevating body 38 to the reader 10 at least so as not to be able to rise can be provided instead of the pulling line 57.

(Effect of the Invention) As described above, according to the device of the present invention, the steel pipe pile is hung through the ring for driving the steel pipe pile, and the lower end of the steel pipe pile is directly built in the ground by its own weight. Since the setting of the steel pipe pile is completed by activating the steel pipe pile chuck, the setting of the steel pipe pile is extremely difficult as compared with the case where the upper end of the steel pipe pile must be fitted upward to the steel pipe pile press fitting means. It can be done easily, easily and efficiently. Moreover, when the setting is completed, the lower end of the steel pipe pile is already built in the ground, so it may take some time from the start of the rotary press-fitting operation of the steel pipe pile to the time when the lower end of the steel pipe pile actually starts to be pressed into the ground. Compared with, there is no lost time and the work can be done efficiently.

Moreover, since the leader can be rotated to selectively use the steel pipe pile press-fitting device and the auger drive device, compared with the case where the earth auger must be used by a completely different independent pile driver, The steel pipe pile rotary press-fitting process and the earth auger using process can be switched easily and efficiently.

Further, according to the present invention, when setting a steel pipe pile or an earth auger, it is possible to use a hanging rope hanging from the arm at the upper end of the leader, but freely adjust the length and direction of the arm according to the situation, It is possible to carry out safe lifting work at all times.

[Brief description of drawings]

FIG. 1 is a side view showing a pile driving barge and a pile driving machine, FIG. 2 is a side view illustrating a work for suspending a steel pipe pile, and FIG. 3 is a position where the auger drive device is located at a pile driving position. Side view of the main part in the state, FIG. 4 is a plan view showing the upper end of the reader,
5 is a cross-sectional plan view showing the positional relationship between the leader, the steel pipe pile press-fitting device, and the auger drive device, FIG. 6 is a cross-sectional plan view showing the lower end of the leader, FIG. 7 is a plan view of the steel pipe pile press-fitting device, and FIG. The figure is a front view of the same section, FIG. 9 is a side view of the same section, FIG. 10 is a schematic side view for explaining the usage state of a steel pipe pile press-fitting device, and FIG. 11 is a plan view of a suspension guide arm. FIG. 13 is a side view of the same, and FIG. 13 is a longitudinal side view of the same main part. DESCRIPTION OF SYMBOLS 1 ... Platform, 2 ... Spat for fixing pedestal, 3 ... Crawler crane, 10 ... Leader, 13,15 ... Leader support member, 18 ... Steel pipe pile press-fitting device, 19 ... Auger drive device,
20, 21 ... Guide rails, 22, 25 ... Elevating lines, 28
… Suspension lines, 29a, 29b… Suspension line guide sheaves, 30
... extendable arm, 32 ... leader rotation cylinder unit, 36 ... leader lower end base, 38 ... lifting body, 3
9 ... Cylinder unit for pushing down the press-fitting device body, 40
... Press-fitting device main body, 41 ... Steel pipe pile rotation drive ring, 42
... Drive unit, 43 ... Steel pipe pile chuck, 47 ... Motor, 49 ... Chuck piece, 53 ... Steel pipe pile chuck driving cylinder unit, 52 ... Elevating guide, 54 ... Steel pipe pile suspending guide, 57 ... Press-fitting device pulling cord, 59 … Steel pipe piles,
60 ... Earth auger, 61 ... Cylindrical support shaft, 62 ... Arm base, 63 ... Arm extension cylinder unit, 64 ...
Telescopic arm part, 65 ... Locking means, 67 ... Spring,
68 ... Lock pin, 70 ... Lock hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-63-251520 (JP, A) JP-A-59-15126 (JP, A) Actually open 57-142038 (JP, U) Actual-open Sho 57- 26447 (JP, U) Actually opened 63-165334 (JP, U) Actually opened 58-53326 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A reader rotatable about a vertical axis,
A steel pipe pile press-fitting device and an auger drive device are supported so that they can be moved up and down separately by shifting the positions in the circumferential direction of the leader, and the press-fitting device is an elevating body that can be fixed at an arbitrary height,
A steel pipe pile rotating machine comprising a press-fitting device main body suspended from the lifting body by a pushing-down cylinder unit, and the press-fitting device main body having a steel pipe pile chuck for clamping the outer peripheral surface of the steel pipe pile vertically penetrating the steel pipe pile. A drive ring and a drive unit for rotationally driving the ring are provided, and an upper end of the leader is provided with an arm rotatable about a vertical axis and extendable and contractible, and a steel pipe pile is provided at the end of the arm. A steel pipe pile placing device that axially supports a guide sheave that guides a suspension line for suspending, etc.