JPH0941860A - Drilling bucket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hardly reduce the work efficiency than before even when there are large stones at the time of drilling. SOLUTION: This drilling bucket is provided with a rotatively driven cylindrical casing 1 and a drilling face section 3 openably/closably fitted to the lower end port of the casing 1, the drilling face section 3 is provided with drilling blades 5, and a sediment intake port 6 into the casing 1 is formed at the position corresponding to the drilling blades 5 of the drilling face section 3. The sediment intake port 6 is extended upward from the outer peripheral wall of the casing 1. When the casing 1 is rotatively driven for drilling, the sediment drilled by the drilling blades 5 is guided from the sediment intake port 6 into the casing 1 and stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling bucket used when excavating a shaft.

[0002]

2. Description of the Related Art Conventionally, a drilling bucket has been used when excavating a vertical shaft for foundation work of buildings or pile driving.

As shown in FIGS. 6 and 7, this drilling
The bucket is a cylindrical casing 31 that is driven to rotate,
The casing (31) has an excavation surface portion (33) attached to the lower end opening thereof by a hinge (32) so as to be openable and closable. Rows of the digging blades 34 are fixed to the digging surface portion 33 at positions symmetrical with respect to the center, respectively. Sediment intake 35
Are formed. An opening / closing door 36 made of metal is provided at each of the earth and sand intakes 35 so that it can be opened and closed upward by a hinge 37.

When drilling a vertical shaft, drilling
When the bucket is rotationally driven, the earth and sand excavated by the row of the excavation blades 34 pushes up the metal opening / closing door 36 of the excavation surface portion 33 upward, and is guided and accumulated from the earth and sand intake port 35 into the housing 31. When the housing 31 is filled with earth and sand, the drilling bucket is once pulled out, the excavation surface portion 33 is opened, the earth and sand are discarded, and the excavation is restarted again.

However, when a stone larger than the sediment intake port 35 of the excavation surface 33 appears, it cannot be guided into the drilling bucket and cannot be processed. Therefore, the drilling bucket is taken out from the vertical shaft each time. Instead of a hammer
It was necessary to install a shovel and remove the large stone. That is, there is a problem that work efficiency decreases when there is a large stone when excavating.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide a drilling bucket in which work efficiency is less likely to be lowered than in the conventional case even when a large stone is present during excavation.

[0007]

In order to solve the above-mentioned problems, the present invention employs the following technical means.

The drilling bucket according to the present invention has a cylindrical casing which is rotationally driven, and an excavation surface portion which is openably and closably attached to a lower end opening of the casing, and the excavation blade portion is provided on the excavation surface portion. Is, with the earth and sand intake into the housing at a position corresponding to the digging blade in the excavation surface portion, the earth and sand intake is made to extend the outer peripheral wall of the housing upward. When the housing is driven to rotate during excavation, the earth and sand excavated by the excavating blade is guided and accumulated from the earth and sand intake into the housing.

That is, in the drilling bucket according to the present invention, the earth and sand intake is formed in the excavation surface at a position corresponding to the excavating blade, and the earth and sand intake is directed upward with the outer peripheral wall of the enclosure. Have been extended.
That is, the sediment intake port extends from the excavation surface portion to the outer peripheral wall of the housing. Therefore, the earth and sand intake can be set larger than before, and even if a large stone appears during excavation, it can be smoothly guided into the housing.

Further, the earth and sand inlet may be provided with an opening / closing door made of an elastic body so that it can be opened and closed by being deformed toward the inside of the housing.

[0011] By the way, in the case where the opening / closing door made of metal is provided at the earth / soil intake as in the conventional case, if a large amount of earth / sand is accumulated in the housing, there is still a margin in the storage capacity of the housing. Even in such a case, the weight of the earth and sand effectively closed the door, making it impossible to take in the earth and sand. on the other hand,
If an opening / closing door made of an elastic body instead of a conventional metal is provided at the earth and sand intake port so that it can be opened and closed by being deformed toward the inside of the housing, a large amount of earth and sand is accumulated in the housing. Even when coming in, new sediment can be guided from inside the enclosure by bending the inward and outward door made of elastic material from the sediment inlet and bending it inward so that it can be captured in one excavation. The amount of waste can be increased and the work efficiency can be improved.

It is also possible to implement it by providing a leading projecting body at the center of the excavation surface portion so as to prevent the excavation direction from shifting. With this configuration, even if the earth and sand intakes are not formed symmetrically with respect to the excavation surface and the outer peripheral wall of the housing, and the component force acts in either horizontal direction during excavation, the center of the excavation surface It is possible to prevent the excavation direction from shifting due to the preceding protrusion.

It is also possible that the preceding protrusion is formed in the shape of a screw. With this configuration, it is possible to suppress the deviation in the excavation direction in a more stable state.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 5, the drilling bucket of this embodiment has a cylindrical casing 1 which is rotationally driven, and a hinge 2 which is attached to the lower end opening of the casing 1 so as to be openable and closable. And a substantially conical excavation surface portion 3. Then, the rotary driving force is transmitted to the socket 4 from a known rotary driving machine (not shown) above. The socket portion 4 is formed on the inner side of the casing 1 rather than the conventional upper portion, so that the overall height of the drilling bucket is kept low. Therefore, it can be suitably used even in a place having a certain height limitation such as under a highway or under a bridge.

On the excavation surface portion 3, a row of five excavation blades 5 is provided so as to project radially obliquely from the vicinity of the center. A sediment inlet 6 into the casing 1 is formed at a position corresponding to the excavating blade 5 on the excavation surface portion 3, and the sediment inlet 6 extends with the outer peripheral wall of the casing 1 facing upward. It has been confused. That is, the earth and sand intake port 6 continuously and largely opens from the excavation surface portion 3 to the outer peripheral wall of the housing 1. When the casing 1 is rotationally driven during excavation, the earth and sand excavated by the excavating blade 5 is guided and accumulated from the earth and sand inlet 6 into the casing 1.

At the earth and sand intake 6 of the excavation surface 3 and the earth and sand intake 6 of the outer peripheral wall of the housing 1, an opening / closing door 7 made of an elastic body is deformed toward the inside of the housing 1 so that it can be opened and closed. It is provided in. In this embodiment, a rubber-based material is used as the material of the opening / closing door 7 made of an elastic body, but a resin-based material may be used as well. It is fixed.

At the lower end of the outer wall of the cylindrical casing 1, a side cutter 9 is projected outward at a position corresponding to the row of the excavating blades 5, so that the outer periphery of the casing 1 is excavated during the excavation of a vertical shaft. By excavating a pit having a diameter slightly larger than the diameter, excessive friction between the casing 1 and the pit wall during excavation is avoided.

At the center of the excavation surface portion 3, a screw-shaped leading projection 10 is provided so as to prevent the excavation direction from shifting. This prevents center deviation in the direction of excavation during excavation. .

Next, the usage state of the drilling bucket of this embodiment will be described. Drilling of this embodiment
The bucket drives the socket portion 4 to rotate from an upper rotary drive machine and excavates the soil downward. On the other hand, when the housing 1 is filled with cuttings, the drilling bucket is pulled out from the shaft, and the well-known open / close lever 12 (see FIG. 4) is operated to release the lock 13 (see FIGS. 1 and 2), and the hinge is released. 2, the excavation surface portion 3 is opened (see FIG. 5), and the cutting waste is discharged.

By the way, the earth and sand intake 6 of this one extends continuously and largely from the excavation surface 3 to the outer peripheral wall of the housing 1, and the earth and sand intake 6 can be set larger than the conventional one. Therefore, even if a large stone appears during excavation, the stone can be smoothly guided into the housing 1. Therefore, even if there is a large stone when excavating, there is an advantage that the work efficiency is less likely to be lowered than in the past.

Further, since the opening / closing door 7 is made of an elastic material, even when a large amount of earth and sand is accumulated in the housing 1, new earth and sand is made of a rubber elastic material from the earth and sand intake 6. The opening and closing door 7 is deformed and bent inward to make the housing 1
Since it can be guided inside, it is possible to increase the amount of cutting waste that can be taken in by one excavation compared with the case of using the conventional metal opening / closing door 7, and improve work efficiency. There is an advantage that it can be done.

Further, since the preceding projecting body 10 is provided at the center of the excavation surface portion 3, the earth and sand intake 6 is located at the excavation surface portion 3 and the casing 1.
Even if the component is not formed at a symmetrical position with respect to the outer peripheral wall and the component force acts in any direction in the horizontal direction at the time of excavation, the preceding protrusion 10 at the center of the excavation surface portion 3 prevents the center deviation and prevents the excavation direction. It is possible to suppress the deviation of the lead protrusion 10 and to form a more stable state because the leading protrusion 10 has a screw shape, and it is possible to prevent the deviation in the excavation direction.

[0024]

The present invention is configured as described above and has the following effects.

Even if a large stone appears during excavation, it can be smoothly guided into the housing, so that even if there is a large stone during excavation, it can be set larger than before. It is possible to provide a drilling bucket that is less likely to reduce work efficiency than before.

[Brief description of drawings]

FIG. 1 is a partially transparent front view illustrating an embodiment of a drilling bucket of the present invention.

2 is a bottom view of the drilling bucket of FIG. 1. FIG.

FIG. 3 is an AA arrow view of the drilling bucket of FIG.

4 is a plan view of the drilling bucket of FIG. 1. FIG.

5 is a partially transparent front view illustrating an open state of the drilling bucket in FIG. 1. FIG.

FIG. 6 is a partially transparent front view of a conventional drilling bucket.

FIG. 7 is a bottom view of the drilling bucket of FIG.

[Explanation of Codes] 1 Case 3 Excavation surface 5 Excavation blade 6 Sediment intake 7 Open / close door 10 Leading protrusion

Claims (4)

[Claims] 1. A cylindrical housing which is rotationally driven,
It has an excavation surface portion that is openably and closably attached to the lower end opening of this housing, an excavation blade is provided on the excavation surface portion, and a sediment inlet into the housing is provided at a position corresponding to the excavation blade on the excavation surface portion. Along with being formed, the earth and sand inlet is made to extend with the outer peripheral wall of the housing facing upward, and when the housing is driven to rotate during excavation, the earth and sand excavated by the excavating blade causes the earth and sand intake to move. The drilling bucket is characterized in that it is guided and accumulated from inside to the housing. 2. The drilling bucket according to claim 1, wherein an opening / closing door made of an elastic body is provided at the earth and sand intake so that the opening / closing door can be deformed and opened / closed inward of the housing. 3. The drilling bucket according to claim 1, wherein a leading protrusion is provided in the center of the excavation surface portion so as to prevent the excavation direction from shifting. 4. The drilling bucket according to claim 3, wherein the leading projection is formed in the shape of a screw.