JPH0128117Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an earth removal device for a pile driver that drives piles while drilling with a cutter.

Conventionally, in this type of pile driving machine, as shown in Fig. 1, earth and sand excavated by a cutter a is placed in a pile b as a plug c, and compressed air is used to raise the earth and sand inside the pile b.
It is dropped to the ground from an earth removal device d installed above the pile b. However, depending on the soil quality, a long plug c may form inside the pile b, and if this plug c falls to the ground from the earth discharge port e, the splash of earth and sand becomes large, causing problems such as staining the surrounding area with earth and sand. It was hot.

This invention was made with the aim of improving this problem.The earth removal device of a pile driver is equipped with a hopper that temporarily stores earth and sand in the earth removal port of the earth removal device body and releases it from a low position. This is intended to prevent soiling of the surrounding area due to the splashing of soil that falls to the ground in the form of clods.

This invention will be described in detail below with reference to embodiments shown in FIG. 2 and subsequent figures. In the figure, 1 is the soil removal device main body,
It is provided so as to be movable up and down along a leader guide A of a pile driver (not shown). An earth and sand inlet 2 is opened in the lower part of the main body 1, and the upper end of the Yatsutoko 3 is connected to this inlet 2, and a guide plate 4 is attached to the lower part of the Yatsutoko 3. The upper end of the pile 5 to be driven into the lower surface of the pile 4 is held. Further, 6 is a drilling rod that penetrates through the main body 1, the rod 3, and the pile 5.
It is designed to be rotated by an auger machine (not shown) installed above, and a cutter (not shown) is attached to the tip of the drilling rod 6, and the soil excavated by this cutter is plugged inside the pile 5. It is raised inside the pile 5 to the inside of the main body 1 by compressed air.

On the other hand, the entrance 2 of the main body 1 is provided with a nozzle 9 that protrudes into the main body 1, and the earth and sand that has passed through the nozzle 9 is guided to an inclined guide plate 10 provided at the top of the main body 1, and is guided to the earth discharge port. 11 direction, and one end of a hopper 12 having a sealed structure is connected to the soil discharge port 11 by a pin 13. The other end side of the hopper 12 hangs downward, and
A cover 15, which can be opened and closed by a cylinder 14, is screwed to the lower end opening 12a via a hinge 16.

Additionally, an air duct 18 with a labyrinth structure that can be opened and closed by a cylinder 17 is located above the hopper 12.
is screwed by a hinge 19, and by opening this air duct 18, the compressed air flowing into the hopper 12 from the main body 1 can be released to the atmosphere. An earth and sand outlet 19 is opened at an intermediate position. This earth and sand outlet 1
9 is a cover 2 that is opened and closed by a cylinder 20 during normal times.
1, so that part of the earth and sand accumulated in the hopper 12 can be discharged.

A plurality of hoppers 12 may be provided as shown in FIG. 7, and the capacity of the hopper 12 may be arbitrarily provided depending on the diameter and length of the pile 6 to be driven, the soil quality, etc.

Since this device has been described in detail above, the earth and sand discharged from the earth discharge port 11 of the main body 1 into the hopper 12 is temporarily stored in the hopper 12, and only compressed air is separated from the earth and sand and is passed through the air duct 18. Since it is released more into the atmosphere and does not fall to the ground in the form of clods, it is possible to prevent soiling of the surrounding area due to splashing. Furthermore, when a certain amount of earth and sand accumulates in the hopper 12, if a container 22 is prepared and discharged into it as shown in FIG.
In addition to being able to quickly dispose of the earth and sand in the tank, since it is discharged at a low position, there is little chance of the earth and sand splashing back during discharge. Furthermore, the earth and sand containing a large amount of water discharged when excavating the aqueous layer can be discharged by opening the cover 21 of the earth and sand outlet 19 provided in the middle of the hopper 12 as shown in FIG. The storage and discharge of earth and sand can be easily selected depending on the soil quality, and if the air duct 18 has a labyrinth structure, the rebound of the earth and sand that has fallen into the hopper 12 can be prevented from being released from the air duct 18 to the outside. You can also do that.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of a conventional pile driver, Figure 2 is a partially cutaway side view of an earth removal device that is an embodiment of this invention, Figure 3 is a plan view of the same, and Figure 4 is a vertical sectional view. , 5th
6 and 6 are action explanatory diagrams, and FIG. 7 is an explanatory diagram showing another embodiment. 1 is the soil removal device body, 5 is the pile, 6 is the drilling rod,
11 is a soil discharge port, 12 is a hopper, 12a is an opening,
15 is a cover, 18 is an air duct, 19 is an earth and sand outlet, and 21 is a cover.

Claims (1)

[Scope of utility model registration request] In an apparatus in which a pile 5 is driven while drilling underground with a drilling rod 6, an earth removal device main body is provided above the pile 5 to accommodate excavated soil rising inside the pile 5 by an earth removal means such as compressed air. 1 is provided, and the lower end side opening 12a is connected to the upper end side of the hopper 12, which is closed by a cover 15 that can be opened and closed, to the soil discharge port 11 of the main body 1, and an air duct 18 is connected to the upper part of the hopper 12. The earth removal device for a pile driver is also provided with an earth and sand outlet 19 that is closed by a cover 21 that can be opened and closed at an intermediate position.