JPH0629218Y2 - Pile driver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pile driver using a monken.

[Prior Art] The main type of pile driving machine is diesel type, but compared to diesel type, it can be constructed without vibration and noise, excavation and building of piles can be done at the same time, and work is speedy. Since the target ground is sunk without impact, the pile excavation type has become popular in recent years because the pile body is not damaged.

FIG. 3 shows an example of a conventional hollow-digging press-fitting type pile driver.
Leader 2 is installed in front of pile driver main body 1 which is a crawler crane.
And a motor 4, a monken 5, a monken cap 6 and a soil discharge cap 7 are engaged with a guide pipe 3 provided along the leader 2 so as to be vertically movable. In addition, a lower end of a press-fit cylinder 9 whose upper end is connected to a bracket 8 below the motor 4 is detachably connected to the Monken cap 6 arranged on the lower part of the Monken 5,
Thus, the lower end of the screw shaft 10 connected to the drive shaft of the motor 4 is arranged so as to penetrate to the monken 5, the monken cap 6, the earth removing cap 7, and further the pile cap 11 attached to the lower end of the earth removing cap 7. There is. In the figure, 12 is an auger screw connected to the lower end of the screw shaft 10,
13 shows a pile.

Explaining the penetration work of the pile 13 using such a hollow-digging press-fitting pile driving machine, first, as shown in FIG. The pile shaft 13 such as a hollow concrete pile or a steel pipe pile into which the auger screw 12 has been inserted, and the screw shaft 10 is suspended.
The upper end of the auger screw 12 is connected to the lower end of the. Thereafter, as shown in FIG. 4 (B), while the motor 4 is driven and the auger screw 12 is rotated, the press-fitting cylinder 9 is repeatedly expanded and contracted while giving the wire narrowing action to the motor 4. By doing so, the pile 13 is gradually pressed into the ground 14. At this time, the excavated earth and sand is discharged from the earth discharge cap 7. Then, when the tip of the auger screw 12 reaches the support layer 15 as shown in FIG. 4 (C), the press-fit cylinder 9 is inserted here as shown in FIG. 4 (D).
Is extended to press the pile 13 to reach the support layer 15. Next, as shown in FIG. 4 (E), the press-fitting cylinder 9
The lower end of the motor is detached from the monken cap 6 and the motor 4 and the auger screw 12 are appropriately lifted to maintain their positions. From this state, the Monken 5 is lifted up along the guide pipe 3, and is then allowed to fall freely, and the pile 13 is inserted into the support layer 15 by the impact of the Monken 5.

[Problems to be Solved by the Invention] However, in the above-described conventional medium-digging press-fitting pile driving machine, the striking work by the monken 5 is performed by the winch drum 16
Since the pulling is performed by the wire rope 17 fed out from the guide pipe 3, when the Monkey Ken 5 moves up and down along the guide pipe 3, a scraping occurs between the Monkey Ken 5 and the guide pipe 3, and the scraping phenomenon causes the Monkey Ken 5 to make the Monkey Cap 6
On the other hand, there is a problem in that an effective hit cannot be performed due to a slanting contact or severe wear.

In view of the above situation, the present invention is capable of smoothly moving the monken up and down without causing a galling phenomenon to prevent wear between the monken and the guide pipe, and to perform an effective monken striking.

[Means for Solving Problems] The present invention relates to a pile driving machine in which a monkken is vertically moved along a guide provided on a leader to give a penetrating impact force to a pile. A sheave block provided so that the lower guide sheave is positioned above and below is engaged with another guide pipe installed along the leader so as to be able to move up and down, and the monken is provided with a wire rope of a required length. Both ends are connected so as to be symmetrical with respect to the Monken lifting axis, and the middle part of the wire rope is hung around a plurality of top sheaves arranged at the top of the leader to extend from the monken to the top of the leader. The spread angles of the left and right wire ropes with respect to the Monken lifting axis are made uniform, and the suspended middle portion of the wire ropes is guided to the upper guide of the sheave block. Wrap the wire rope around the sheave and feed it from the winch drum.
The wire rope is wound around a guide sheave on the lower side of the sheave block, and then the end portion of the wire rope is fixed to an appropriate position of the pile driver main body.

[Operation] When the wire rope unwound from the winch drum is wound up,
The sheave block equipped with the lower guide sheave around which this wire rope is wound descends, and the descending force of this sheave block is transmitted to the end of the wire rope wrapped around the upper guide sheave, which is the end of the wire rope and the connection with Monken. As a result, the monken is pulled evenly and rises smoothly and horizontally.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a plan view of the top of the leader 2. Here, 18 is a guide sheave that guides the wire rope when winding up and down the motor 4 and the like, and 19 is a guide sheave 1 of the guide sheave.
8 is a bracket that supports 8. Reference numeral 3'denotes a guide pipe provided along the leader 2 with a 90.degree. Alternatively, another working unit may be attached to the guide pipe 3'and therefore the guide sheave 18 'and the bracket 1 may be located above and opposite the guide pipe 3'.
9'is provided.

The present invention, as shown in FIGS. 1 and 2, includes a sheave block 2 provided with a guide pipe 3'so that an upper guide sheave 20 and a lower guide sheave 21 are vertically arranged.
The upper and lower guide sheaves 20 are wound around the central portion of the wire rope 23 whose both ends are connected to symmetrical positions of the upper end of the Monken 5, and the upper guide sheave of the wire rope 23 is engaged. A top sheave arranged between the sheave 20 and the monken 5 so as to avoid the positions of the brackets 19 and 19 'above the leader 2 and to move the monken 5 up and down in accordance with the center of gravity. 24, 25, 26, 27, 28, and these top sheaves 24 to 28 are supported by support brackets 29, 30, 31, and further, the pile driver main body 1
The wire rope 32 fed from the winch drum 16 provided for the sheave block 22 is guided through the guide sheave 33.
After being wound around the lower guide sheave 21, it is fixed to a proper position of the pile driver main body 1.

The top sheaves 24 and 28 are wire ropes 23 that extend from the connecting portion of the monken 5 to the top sheaves 24 and 28.
Are arranged on the support brackets 29 and 31 so as to form an even spread angle θ by striving for the lifting axis of the monken 5, and similarly, the top sheaves 26 and 27 are also arranged from the upper guide sheave 20 to the top sheave 26 ,. The support bracket 3 extends so that the wire rope 23 extending to 27 works toward the lifting axis of the sheave block 22 to form an even spread angle.
It is located at 0 and 31.

With such a configuration, as shown in FIG. 4 (E), when the monken 5 is moved up and down to perform the work of penetrating the pile 13, the wire rope 32 is wound by the winch drum 16 and then the winch drum 16 is wound up. Try to rewind. Wire rope 3
When 2 is wound up on the winch drum 16, the sheave block 22 descends along the guide pipe 3 ′ via the lower guide sheave 21. When the sheave block 22 descends, the upper guide sheave 20 pulls the wire rope 23, so the force is transmitted to both ends of the wire rope 23 via the respective top sheaves 24 to 28, and the Monken 5 is lifted up along the guide pipe 3. . At this time, the wire rope 23 for hoisting the monken 5 forms an even spread angle θ with respect to the elevating axis of the monken 5 to perform both pulling.
Moves smoothly and horizontally and does not cause galling on the guide pipe 3. Winch drum 16 to wire rope 3
When 2 is rewound and the descending force of the sheave block 22 is released,
Contrary to the above, the sheave block 22 rises along the guide pipe 3'and the monken 5 falls. At this time, since the monken 5 also descends while maintaining the horizontal state, it does not cause galling, and by this, it can accurately contact the monken cap 6 and give an effective striking force to the pile 13. Further, since the wire rope 23 in the portion wound around the upper guide sheave 20 of the sheave block 22 has an even spread angle with respect to the elevating axis of the sheave block 22, the sheave block 22 smoothly follows the guide pipe 3 '. As the guide pipe 3'is lowered and raised, no galling occurs on the guide pipe 3 ', so that the sheave block 22 can be smoothly moved and the Monken hitting work can be smoothly performed.

In the above, the wire rope used for hitting Monken,
Since the sheave block 22 is divided into the wire ropes 23 and 32, the wire rope 23 can be disassembled and moved while being passed through. When the wire ropes 23 and 32 are damaged, only the damaged wire rope 23 or 32 can be replaced, which is economical.

Further, as shown in FIGS. 1 and 2, the upper guide sheave 2
By adopting the sheave block 22 provided so that the 0 and the lower guide sheave 21 are located above and below, it can contribute to the prevention of the inclination of the sheave block 22 itself when moving up and down, and the structure of the sheave block 22 is simple. This is convenient in terms of simplifying the mechanism.

In addition, in the above-mentioned embodiment, the medium excavation press-fitting type pile driving machine has been described, but depending on the ground, the pile driving can be performed only by the Monken striking work. Targets pile driving machines that can hit Monken.

[Advantages of the Invention] As described above, according to the pile driving machine of the present invention, since the inclination due to the pulling of the wire rope does not occur during the hammering striking work, the galling phenomenon between the guide pipe and Wear due to this is prevented, therefore it is possible to raise and lower the Monken in a horizontal state and perform effective Monken striking. Moreover, the sheave block can be smoothly moved up and down along the guide pipe, which contributes to smooth striking work of the Monken. The structure of the sheave block itself is simple and convenient in terms of simplification of the mechanism, and the wire rope for raising and lowering the Monken and the wire rope for raising and lowering the sheave block are separated from each other with the sheave block as a boundary. Since it is a wire rope, the wire rope can be easily replaced, and other excellent effects can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an essential part of a pile driver of the present invention, and FIG.
The figure is a partial plan view, Fig. 3 is an overall view showing an example of a hollow excavation type pile driver, and Figs. 4 (A) to (E) are pile penetration work using the pile driver shown in Fig. 3. FIG. 1 is a pile driver main body, 2 is a leader, 3 and 3'are guide pipes, 4 is a motor, 5 is a monken, 9 is a press-fitting cylinder, 1
2 is an auger screw, 13 is a pile, 16 is a winch drum, 20 and 21 are guide sheaves, 22 is a sheave block, 23 is a wire rope, 24-28 are top sheaves,
Reference numeral 32 represents a wire rope, and reference numeral represents a lifting axis line of the monken 5.

Claims (1)

[Scope of utility model registration request] 1. In a pile driving machine in which a Monken is vertically moved along a guide pipe provided in a leader to give a penetrating impact force to a pile, an upper guide sheave and a lower guide sheave move up and down. The sheave block provided so as to be located at the position is engaged with another guide pipe installed along the leader so as to be able to move up and down, and the sheave block of the required length is
Connect both ends of the wire rope so that they are symmetrical with respect to the Monken elevation axis, and hang them around the top sheaves arranged at the top of the leader with the middle part of the wire rope suspended. From the top of the leader to the leader top, the spread angles of the left and right wire ropes with respect to the Monken lifting axis are equalized, and the suspended middle part of the wire rope is wound around the upper guide sheave of the sheave block and further fed out from the winch drum. The wire rope is wound around a guide sheave below the sheave block, and then the end of the wire rope is fixed to a proper position of the pile driver main body.