JPS6059371B2 - steel pile press-in machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press-in machine for press-fitting steel piles into the ground by using a hammer in conjunction with the action of a tensile force on the steel piles and an auger.

Known steel pile press-in machines include a driving machine that uses a hammer;
There is a press-fitting machine that uses an auger and static pressure without using a hammer. Both types have a boom of a certain length attached to a self-propelled vehicle, a leader device suspended from the tip of the boom,
A fixed triangle is formed by a connecting fitting that connects the reader device and the vehicle. Therefore, in order to accurately guide the steel pile held by the leader device to a predetermined point, for example, a position where it will fit into a previously driven steel sheet pile, precise position control of the vehicle is required. If it is difficult to move the vehicle to the required location due to this, driving steel piles is almost impossible. The purpose of the present invention is to solve this problem and provide a steel pile press-in machine that makes the relative distance between the lower end of the leader device and the vehicle variable and significantly facilitates the work. In a press-in machine that holds a pile with a leader supported by a self-propelled vehicle and press-fits it into a predetermined point, the self-propelled vehicle is equipped with a boom that can be rotated, raised and retracted, and a horizontal axis is connected to a mounting bracket fixed to the tip of the boom. A swing gate bracket is rotatably supported as a center, a sheave case is attached to the swing bracket via a thrust bearing device so as to be rotatable around a vertical axis, and a leader device is suspended from the bottom of the sheave case. , an earth auger, an auger drive device, and a steel pile pushing head connected to the auger drive device are arranged on one side of the leader device, and a sheave for pushing steel piles is arranged on the other side, and the leader device A pulley is arranged at the lowest end, an auxiliary winding wire connected to a means for lifting the steel pile, an auger suspension wire connected to the auger drive device for suspending the auger drive device, and for press-fitting the steel pile, three wires, including a pull wire that is connected to the pushing sheave connected to the wire stretched across the pushing head via the pulley, and pulls the pushing sheave upward, thereby pulling the pushing head downward; of,
The thrust bearing device is passed through a cylindrical member of the thrust bearing device and is operated by each winding device attached to the self-propelled vehicle.

The present invention will be explained in more detail based on illustrated embodiments.

FIG. 1 is a side view of a steel pile press-in machine according to the present invention, in which a three-stage telescopic boom 4 is supported by a swivel platform 3 on a vehicle body 2 of a truck crane 1. The truck crane 1 itself has a known structure, and extends and contracts the boom 4, raises and lowers it, and rotates it. A press-fitting device 5 with an earth auger is pivotally supported at the tip of the boom 4 so as to be relatively rotatable. The illustrated press-fitting device 5 includes a boom mounting bracket 6 fixed to the boom 4, a swing bracket 7 that is pivotally supported by the bracket 6 and is rotatable about a horizontal axis, and a predetermined angular range about a vertical axis with respect to the swing bracket 7. For example, the upper sheave case 8 is rotatable by plus or minus 45 degrees, and the upper sheave case 8 is rotatable by plus or minus 45 degrees. A leader device 9 fixed to the base 8, an auger drive device 10 guided and supported by the leader device 9, and a spiral earth auger 11 attached to the auger drive device 10 to rotate and move up and down in the vertical direction.
, which is guided and supported by the sorter device 9 and grips the upper end of the steel sheet pile. The steel sheet pile pushing head 12 is attached to the lower end of the leader device 9, and includes an auger 11 and a lower sheave case 13 that guides the lower end of the steel sheet pile. In the present invention, a leader device 9 is supported on a multi-stage telescopic boom 4 using a truck crane 1 so as to be rotatable about a horizontal axis and a vertical axis, and all operations can be performed within a crane operating gear pin. A wire is connected between the boom 4 and the leader device 9.

Therefore, the parts that are significantly different compared to known devices are:
These are a boom mounting bracket 6, a swing bracket 7, and an upper sheave case 8, which will be described in detail below. Second
3 and 3 show an enlarged sectional view between the tip of the boom 4 of the truck crane 1 and the sorter device 9. As shown in FIG.

The boom mounting bracket 6 has two approximately triangular side plates 21.
The boom 4 is rigidly connected to each other by pins 22 and 23.
The two side plates 25A of the swing bracket 7 are rotatably supported by pins 24 about the horizontal axis. Three pulleys 26, 27, 28 in parallel on pin 23
As will be described later, wires 30, 31, and 32 are guided between the boom 4 and the swing bracket 7, respectively. The two upper side plates 25 of the swing bracket 7 are integrally fixed to the lower cylinder 33, and the cylindrical member 35 of the upper sheave case 8 can be rotated about a vertical axis via a thrust bearing device 34 in the cylinder 33. support. Three pulleys 37, 38, 39 are supported by a pin 36 attached to the side plate 25, and guide the wires 30, 31, 32, respectively,
Connect these wires from the boom 4 vertically downward to the cylindrical member 3.
5 allows relative rotation between the pivot bracket 7 and the upper sheave case 8 about a vertical axis. The upper sheave case 8 has a substantially box-shaped rigid structure, and is supported by the swing bracket 7 by a cylindrical member 35 attached to the top plate 41, and the reader device 9 is fixed to the bottom plate 42.
A large number of pulleys are supported within the upper sheave case 8 by a large number of horizontal and vertical pins. Each of the pulleys in the sheave case 8 will be described below together with the outline of the operation and the lobe path diagrams shown in FIGS. 4 to 6. The first step in the work is to suspend the steel sheet piles.

The wire 31 is extended by the auxiliary winch operating lever in the crane operating gear pin. The wire 31 enters the upper sheave case 8 through the pulley 27 of the boom 4 and the pulley 38 of the swing bracket 7, and passes through pulleys 52 and 53 supported on horizontal pins 50 and 51. The pin 51 is supported by a bracket 54 that projects laterally of the sheave case 8. Therefore, the pulley 53 projects laterally of the sheave case 8 and supports the auxiliary winding hook 55. A steel sheet pile (not shown) is lifted by the auxiliary hoisting hook 55 and attached to the lower part of the steel sheet pile pushing head 12. Next, the swivel base 3 and boom 4 are operated to fit into a desired position, for example, the steel sheet pile that has already been press-fitted. Further, the auger 11 is used to dig soil by the auger drive device 10, and at the same time the steel sheet pile pushing head 12 is pulled to press the steel sheet pile into the ground. FIG. 5 is an auger suspension wire route diagram.

The wire 30 passes through the pulley 26 in parallel with the auxiliary winding wire 31, passes through the pulley 37 of the swing bracket 7, and enters the upper sheave case 8. It passes through a pulley 61 and a restraining pulley 62 supported on a pin 60 inside the sheave case 8, and further passes through a pulley 64 supported on a pin 63 on a vertical axis, and enters a set of pulleys 65 outside the sheave case 8. A pulley set 65 is supported on pins 68 attached to brackets 66 and 67 projecting outward from the upper sheave case 8. Pulley set 6
A set of pulleys 69 opposite 5 supports the earth auger drive 10. This exerts a large force when withdrawing the auger. Figure 6 shows the main wire system for press-fitting steel sheet piles.

In this press-fitting machine, a pushing head 12 that supports the upper end of a steel plate is used.
A wire 70 attached to the steel sheet pile is routed through the lower sheave cases 1 and 3 to a sheave 71, and this sheave 71 is pulled by the wire 32 to push the steel sheet pile into the ground. Wire 32 connected to the main winch attached to truck crane 1
passes through the pulley 28 at the top of the hoom 4 in parallel with the wires 30 and 31, and then enters the upper sheave case 8 through the pulley 39 of the swing bracket 7, and is connected to the horizontal pin 72 below the aforementioned pin 60. Pulley 73 supported by
pass through. Furthermore, the wire 32 passes through a restraining pulley 74 and a pulley 75 which is located below and coaxially with the pin 63 and is supported on a pin 76 . Next, the wire 3 passes through a pulley 78 supported by a pin 77 on the horizontal axis and exits the upper sheave case 8.
2 enters pulley group 79. A pin 82 attached to the bracket or side walls 80, 81 protruding outward from the sheave case 8
The pulley set 79 is supported by the pulley set 79.
is combined with the pulley set 83 of the lower sheave 71. A pulley 85 is attached to a hanging bracket 84 attached below the sheave 71.
support. The wire 70 is passed through the pulley 85, and as shown in FIG. 1 and FIG. is attached to the steel sheet pile pushing head 12. By operating the main winch, the wire 32 enters the swing bracket 7 and the upper sheave case 8 from the top end of the boom 4, and the wire 32 exiting the upper sheave case 8 moves the sheave 11 upward. Further, the wire 70 connected to the sheave 71 passes through the lower sheave case 13 and pulls the upper pushing head 12 downward with a large force, and the steel sheet pile attached to the pushing head 12 is press-fitted into the ground. The earth auger 11 simultaneously digs into the soil and facilitates press-fitting of the steel sheet pile. When the steel sheet pile is press-fitted to a predetermined position, the pushing head 12
, and then operate the auger lifting winch while backfilling the soil by rotating the auger 11 in the opposite direction, and the wire 30
enters the upper sheave case 8 from the top end of the boom 4 via the swing bracket 7, and pulls up the auger drive 10 and sheet pile pushing head 12 by pulley sets 65 and 69 through the path shown in FIG.

This operation can also be used for pulling out used steel sheet piles, and in this case, the auger 11 is not attached. The steel pile press-in machine according to the present invention has the above-described structure and function, and has the following advantages.

(1) As a self-propelled vehicle, a truck crane vehicle can be used instead of a dedicated vehicle. However, since a truck crane usually has two winches, three winches are required for the press-fitting work of the present invention.
Winches are required and minor modifications are required. (2
) Since the leader is supported at the top of the multi-stage telescopic boom of the crane so that it can rotate around horizontal and vertical axes, there is no need to accurately move the truck itself, and only the lower sheave case 13 can be rotated to accurately position it. However, it is easy to follow the top edge.

Therefore, the time required for positioning is significantly reduced,
The stopping position of the truck crane can be selected from a wide range, and when adjacent steel sheet piles are press-fitted, there is no need to change the stopping point of the vehicle each time, and work efficiency is significantly improved. (3) Furthermore, by guiding all the wire equipment into the truck crane, the operation is significantly simpler.

By passing the wire through the thrust bearing device of the pivot bracket, the reader device can be pivoted over a wide range of angles. (4) Since it is press-fitted using the tensile force of a winch, it does not generate the noise of known hammer machines.

[Brief explanation of drawings]

The drawings show an embodiment of the steel pile press-in machine according to the present invention, and FIG. 1 is a side view thereof, FIG. 2 is an enlarged vertical sectional view of the upper end portion of FIG. 1, and FIG. 3 is an upper end portion of the same. The enlarged cross-sectional view of FIG. 4, FIG. 5, and FIG. 6 are route diagrams of each wire. Code 1 is a truck crane, 3 is a swivel platform, 4 is a boom,
5 is a press-fitting device, 6 is a boom mounting bracket, 7 is a swing bracket, 8 is an upper sheave case, 9 is a leader device,
10 is an auger drive device, 11 is an earth auger, 12
is the steel sheet pile pushing head, 13 is the lower sheave case, 30,
31 and 32 are wires, and 34 is a thrust bearing device.

Claims (1)

[Claims] 1 In a press-in machine that holds a steel pile with a leader supported by a self-propelled vehicle and press-fits it into a predetermined point, the self-propelled vehicle is equipped with a boom 4 that can be rotated, raised and retracted, and a mounting bracket fixed to the tip of the boom 4. A pivot bracket 7 is pivotably supported on the pivot bracket 6 so as to be rotatable about a horizontal axis.
A sheave case 8 is attached rotatably around a vertical axis via a thrust bearing device 34, and a leader device 9 is installed at the bottom of the sheave case 8. An auger drive device 10 and a steel pile pushing head 12 connected to the auger drive device 10 are arranged, a sheave 71 for pushing steel piles is arranged on the opposite side, and a pulley 86 is arranged at the lower end of the leader device 9. -89 are arranged and the auxiliary winding wire 31 is connected to a means for hoisting the steel pile.
and an auger suspension wire 3 connected to the auger drive device 10 for suspending the auger drive device 10.
0, and for press-fitting a steel pile, connect the wire 70 that is stretched over the push-in head 12 via the pulleys 86 to 89 to the connected push-in sheep 71, and pull the push-in sheep 71 upward. three wires 31, 30, with a pull wire 32 pulling the pusher head 12 downward;
32 is passed through the cylindrical member 35 of the thrust bearing device 34 and is operated by respective winding devices attached to the self-propelled vehicle.