JP2001032668A - Bottom enlarged bucket device and adaptor for bottom enlarged bucket device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottom enlarged bucket device and an adaptor for the bottom enlarged bucket device constituted to avoid the height of the whole bottom enlarged bucket device becoming high in the case of fitting the bottom enlarged bucket device to a different kelly-bar. SOLUTION: A flange 16 with a plurality of connector fitting holes 20 is provided at the upper end of a bottom enlarged bucket 9. A flange 15 with a plurality of connector fitting holes 25 is provided at the central part lower face of a stabilizer. A connecting adaptor 17 interposed between both flanges 15, 16 is provided, and the adaptor 17 and the upper end flange 16 of the bottom enlarged bucket 9 are connected by a connector comprising a bolt 27 and a nut 29 inserted through the connector fitting holes 20, 21 provided in the flange 16 and adaptor 17. The adaptor 17 and the flange 15 of the stabilizer are connected by a connector comprising a bolt 31 and a nut 32 inserted through connector fitting holes 23, 25 provided in the adaptor 17 and flange 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottomed bucket device in which a stabilizer is coaxially mounted on a bottomed bucket of an earth drill, and an adapter used for connection between the stabilizer and the bottomed bucket.

[0002]

2. Description of the Related Art In an earth drill, a kelly drive device is attached to a leader or a front frame attached to a main body, and a kelly bar is inserted into a through hole of a rotary driving body of the kelly drive device so as to be vertically movable and relatively non-rotatable. It is configured by attaching a drilling bucket to the lower end of the keleba. When installing the bottom-expanding bucket at the lower end of the keriba, the bottom-expanding bucket opens around the bottom-extending wing and excavates, so there is a risk of core runout.Therefore, a circular stabilizer fitted into the hole drilled at the top of the bucket has a bucket. Mounted concentrically with. At the center of the stabilizer, there is provided a coupling portion such as a square boss portion for fitting and pinning the lower end portion of the keriba.

[0003] The type of the stabilizer is prepared according to the type of the widened bucket. In addition, even if the bucket size is the same, if the specification value of the excavation torque is different, a stabilizer is conventionally prepared for each type of the widened bucket.

[0004] Further, in the case where a conventional bottomed bucket device consisting of a stabilizer and a bottomed bucket is mounted on a kerry bar having a size different from that of a normal kelly bar, a Japanese Unexamined Patent Publication No. 7-4247 discloses a method in which a stabilizer is connected between the joint portion of the stabilizer and the kelly bar.
No. 0 discloses a joint as described.
This joint has a coupling portion at a lower portion thereof that fits with a coupling portion such as a square boss portion of the stabilizer, and has a coupling portion at an upper portion for fitting a lower end portion of the keriba. Each is connected to the kelly bar and the connecting portion by a pin.

[0005]

The conventional bottom-expanded bucket device has a problem in that it is necessary to provide a stabilizer for each type of bottom-expanded bucket, so that the number of stabilizers to be prepared increases.

Further, as described above, when the bottom-enlarging bucket is connected to the kelly bars of different sizes via joints, the height dimension of the entire bottom-enhancing bucket device, that is, the distance from the bottom lid of the bottom-enlarging bucket to the connecting part to the kelly bar is increased. The height dimension increases by the joint. For this reason,
Unless the height of the keriba at the time of unloading is changed, the bottom lid may land on the ground when the expanded bottom bucket is opened, and a situation may occur in which the unloading cannot be performed.

SUMMARY OF THE INVENTION In view of the above problems, the present invention eliminates the need for a joint interposed between the kelly bar and the stabilizer when the bottomed bucket device is used in combination with a kelly bar different from the conventional one. A bottom-enlarging bucket device having a configuration capable of avoiding an increase in the height of the entire bottom-enhancing bucket device from the bottom lid of the bucket to a connection portion to the kelly bar, and a bottom-expanding bucket device for connecting between the stabilizer and the bottom-enhancing bucket The purpose is to provide an adapter.

Another object of the present invention is to provide a bottomed bucket device and an adapter for a bottomed bucket device having a configuration in which different types of bottomed buckets can be attached to a common stabilizer.

[0009]

According to a first aspect of the present invention, there is provided a bottomed bucket device comprising a stabilizer connected to a lower end of a kelly bar rotated by a kelly drive device of an earth drill, and a bottomed bucket connected below the stabilizer. An expanded bottom bucket device, comprising: a flange having a plurality of fastener mounting holes at an upper end of the expanded bottom bucket; a flange having a plurality of fastener mounting holes on a lower surface of a central portion of the stabilizer; and a flange between the two flanges. An intervening coupling adapter is provided, the adapter comprising a plurality of coupling holes that match the coupling holes of the flange at the upper end of the bottomed bucket, and a plurality of couplings that match the coupling holes of the flange of the stabilizer. A mounting hole, and the adapter and the flange at the upper end of the expanded bottom bucket, The adapter and the flange of the stabilizer are coupled by a coupling inserted through the coupling attachment hole, and the expanded bucket and the stabilizer are coupled by coupling the adapter and the flange of the stabilizer by a coupling inserted through the coupling attachment hole provided therein. It is characterized by having done.

[0010] As described above, a stabilizer that can be connected to different sized keribas is prepared, and the stabilizer and the bottomed bucket are connected with the plate-shaped adapter and the connecting tool. It does not substantially increase the overall height of the bottomed bucket device to its connection to Keriva. In addition, by preparing a plurality of adapters having different arrangements and sizes of the fitting mounting holes in accordance with the type of the bottomed bucket, 1
A plurality of types of expanded bottom buckets can be rearranged and attached to various kinds of stabilizers.

According to a second aspect of the present invention, there is provided an adapter for a bottomed bucket device for connecting a stabilizer connected to a lower end of a kelly bar rotated by a kelly drive device of an earth drill and a bottomed bucket provided below the stabilizer. A plurality of fitting holes for fitting the fitting holes of the flange provided at the upper end of the bottomed bucket and fitting holes of the flange provided on the lower surface of the stabilizer. The adapter and the flange at the upper end of the expanded bottom bucket are connected by a connector inserted into the connector mounting hole provided therein, and the adapter and the stabilizer are connected to each other. Flange and
The present invention is characterized in that it has a structure in which the expanded bottom bucket and the stabilizer are connected by being connected by a connecting tool inserted into a connecting hole for mounting a tool provided therein.

By preparing such an adapter, it is possible to prevent the overall height of the above-described expanded bottom bucket device from being increased, and to prepare an adapter according to the type of the expanded bottom bucket. Various kinds of bottomed buckets can be attached to the stabilizer.

[0013]

FIG. 1 is a side view of an earth drill showing one embodiment of a bottomed bucket device according to the present invention. In this earth drill, a reader 2 is attached to a main body 1 which is a self-propelled vehicle, and a kelly drive device 4 is attached to the reader 2.
Is mounted so that it can be raised and lowered by the hydraulic cylinder 3 for lifting. A kelly bar 5 is inserted through the kelly drive device 4 so as to be vertically movable. The kelly bar 5 is wound by a winch 6 on the main body 1 and fed by a wire rope 7.
And is supported via a swivel joint 8. At the lower end of the kelly bar 5, a bottomed bucket device 11 including a bottomed bucket 9 and a stabilizer 10 is attached.

Reference numeral 12 denotes a reel table attached to the lower part of the Kelly drive device 4. The reel table 12
The hose reel 13 which winds a hydraulic hose or the like for supplying pressure oil to a hydraulic cylinder for opening and closing the expanding blade provided in the expanding bucket 9 and a potentiometer for detecting the degree of opening of the expanding blade are provided. A cable reel 14 and the like around which a signal transmission cable is wound are mounted.

In this earth drill, the wire rope 7 is fed out by a winch 6, the lowering bucket device 11 is lowered to the bottom of a previously drilled vertical hole (not shown), and the kelly drive device 4 is gradually opened while the expanding blades are gradually opened. When the soil is filled in the bottomed bucket 9, the bottomed wing is closed, the wire rope 7 is wound by the winch 6, the bottomed bucket device 11 is pulled up to the ground, and the bottom lid 9a of the bottomed bucket 9 is opened. The operation of removing the soil is repeated to form an enlarged portion at the bottom of the vertical hole.

FIG. 2 is an enlarged side view of the expanded bottom bucket device 11, FIG. 3 is a plan view showing the mutual arrangement of the adapter and the joint between the stabilizer 10 and the expanded bottom bucket 9, and FIG. FIG. 5 and FIG. 5 are perspective views showing the configuration of members relating to the connection between the bucket and the stabilizer.

In these figures, as shown in FIGS. 2 to 4, the central part of the stabilizer 10 is
There is provided a connecting portion 10a which is fitted with the connecting portion 5a at the lower end of the connector and is connected by the pin 13. A flange 15 is provided at the lower end of the central portion of the stabilizer 10, that is, at the lower end of the connecting portion 10a. Reference numeral 16 denotes a flange provided on the upper end of the bottomed bucket 9, and reference numeral 17 denotes a disk-shaped adapter interposed between the flanges 15 and 16 to connect the two.

A flange 1 provided on the upper end of the bottomed bucket 9
As shown in FIG. 5, a plurality of rotational force transmitting and positioning knock pins 19 and a plurality of coupler mounting holes 20 are provided concentrically on the 6. The adapter 17 has a fitting hole 22 for the knock pin 20 and a fitting mounting hole 2.
0 and the fitting mounting holes 21 corresponding to the reference numeral 0 are arranged concentrically. Further, the adapter 17 is provided with a coupler mounting hole 23 and a knock pin 24 concentrically on the outer peripheral side of the circle in which the coupler mounting hole 21 is provided.

The flange 1 at the lower end of the stabilizer 10
5 is provided with a fitting hole 25 corresponding to the fitting hole 23 and a fitting hole 26 of the knock pin 24 of the adapter 17.

Then, the adapter 17 is fitted on the flange 16 at the upper end of the bottomed bucket 9 and the fitting hole 22 of the adapter 17 is fitted into the knock pin 19 of the flange 16 to position the adapter 17 as shown in FIG. And flange 16
The adapter 17 is coupled to the flange 16 by inserting a bolt 27 as a coupling tool into the coupling component mounting hole 20 and the coupling component mounting hole 21 on the inner peripheral side of the adapter 17 and screwing and tightening the nut 29.

Next, the knock pin 24 of the adapter 17
The fitting hole 26 of the flange 15 at the lower end of the stabilizer 10 is fitted, and the fitting mounting hole 2 on the outer peripheral side of the adapter 17.
The flange 15 is connected to the adapter 17 by inserting the bolt 31 into the mounting hole 26 of the connecting member 3 and the flange 15 and screwing it to the nut 32 to tighten. Thereby, the stabilizer 10 is connected to the expanded bottom bucket 9 via the adapter 17.
Are combined. In addition, the upper end of the bolt 27 that couples the adapter 17 to the flange 16 is housed in a concave portion (may be a hole) 30 provided on the lower surface of the flange 15 of the stabilizer 10.

As described above, the stabilizer 10 and the bottomed bucket 9 are connected to the flanges 15, 16 via the adapter 17.
In this case, the bottomed bucket 9 having a different torque or structure, such as a different excavation torque of 6 t-m, 10 t-m, or the like, is connected to the common stabilizer 10 by changing the adapter 17. Can be mounted.
That is, the adapter 1 interposed between the flanges 15 and 16
7 by changing the arrangement and size of the fitting mounting holes 21 and the fitting holes 22 according to the size and the layout of the knock pins 19 of the flanges 16 and the fitting mounting holes 20 of the bottoming buckets 9 of different types. can do. In other words, by preparing a plurality of adapters having different arrangements and sizes of the fitting mounting holes 21 and the fitting holes 22 corresponding to the types of the bottomed buckets, a plurality of types of bottomed buckets can be provided for one type of stabilizer 10. The bucket 9 can be rearranged and mounted.

From another point of view, when employing the kelly bar 5 having a different size and a different structure of the connecting portion 5a from the conventional one,
A stabilizer 10 that can be connected to the kelly bar 5 is prepared, and a flange 15,
In the case of a structure in which the flange 16 and the adapter 17 are connected to each other, the fitting 16 has a fitting hole 22 and a fitting hole 21 corresponding to the knock pin 19 and the fitting mounting hole 20 of the flange 16 of the conventional bottomed bucket 9. By preparing the adapter 17 having the knocking pin 24 and the fitting mounting hole 23 corresponding to the fitting hole 26 and the fitting mounting hole 25, the conventional expanded bottom bucket 9 can be connected to the stabilizer 10.

With such a flange connection structure in which the plate-shaped adapter 17 is interposed, the height of the entire bottomed bucket device from the bottom lid 9a of the bottomed bucket 9 to the connecting portion 10a of the stabilizer to the keriba is substantially reduced. It does not increase. The knock pin 19 may be provided on the adapter 17 side, and the knock pin 24 may be provided on the flange 15 side.

The present invention can be applied not only to a leader type earth drill but also to a boom type earth drill.
Also, if the stabilizer 10 has a structure in which an adapter for diameter expansion can be mounted around the stabilizer,
The invention of the present application can be applied to a bottomed bucket having a different diameter, and the applicable range can be further expanded.

[0026]

According to the present invention, a stabilizer having a coupling portion adapted to different kelly bars is prepared, and the stabilizer and the widened bucket are flange-coupled via a plate-shaped adapter. If you want to install an existing bottoming bucket on a different new Keriva,
The conventional joint can be eliminated and combined, thereby preventing the height of the entire bottomed bucket device from increasing. Therefore, even when an existing bottom-expanding bucket is attached to a new kelly bar, the earth discharging height can be secured.

Further, since it is possible to attach different types of bottomed buckets to one stabilizer,
It is economical.

[Brief description of the drawings]

FIG. 1 is a side view of an earth drill showing one embodiment of a bottomed bucket device according to the present invention.

FIG. 2 is an enlarged side view of the bottomed bucket device of FIG. 1;

FIG. 3 is a plan view illustrating a mutual arrangement relationship between a coupling portion between a stabilizer and a widened bucket and an adapter according to the present embodiment.

FIG. 4 is a sectional view taken along line EE of FIG. 3;

FIG. 5 is a perspective view showing a configuration of a member related to coupling of the bucket and the stabilizer in the present embodiment.

[Explanation of symbols]

1: body, 2: reader, 3: lifting hydraulic cylinder, 4:
Kelly drive device, 5: Kelly bar, 5a: Joint,
6: Winch, 9: Expanded bucket, 10: Stabilizer, 10a: Joint, 11: Expanded bucket device, 15,
16: flange, 17: adapter, 19, 24: knock pin, 20, 21, 23, 25: coupling fixture mounting hole, 2
2, 26: fitting hole, 27, 31: bolt, 29, 32:
Nut, 30: recess

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Akio Kiyo 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Inside the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. Inside the Tsuchiura Plant of Shikisha Co., Ltd. (72) Inventor Yoshihito Inanobe 650, Kandamachi, Tsuchiura City, Ibaraki Prefecture Hitachi Construction Machinery Co., Ltd. F-term in Tsuchiura Factory (reference) 2D029 PA02 PD01

Claims (2)

[Claims] 1. A bottomed bucket device comprising: a stabilizer connected to a lower end of a kelly bar rotated by a kelly drive device of an earth drill; and a bottomed bucket connected under the stabilizer. A flange having a plurality of fastener mounting holes, a flange having a plurality of fastener mounting holes on a lower surface of a central portion of the stabilizer, and a coupling adapter interposed between the two flanges. A plurality of fastener mounting holes matching the fastener mounting holes of the flange at the upper end of the bottom-enlarging bucket, and a plurality of fastener mounting holes matching the fastener mounting holes of the flange of the stabilizer; The upper end flange of the bucket is connected to the upper end of the bucket by a fastener inserted into the fastener mounting hole provided therein. With, a flange of the said adapter stabilizer, 拡底 bucket and wherein the bond to be coupled with said stabilizer and said 拡底 bucket by coupler for inserting the fastener mounting hole provided thereto. 2. An adapter for a bottomed bucket device for connecting a stabilizer connected to a lower end of a kelly bar rotated by a kelly drive device of an earth drill and a bottomed bucket provided below the stabilizer, wherein the adapter is A plurality of fitting holes for fitting the fitting holes of the flange provided at the upper end of the bottomed bucket, and a plurality of fitting holes for fitting the fitting holes of the flange provided on the lower surface of the stabilizer. A coupling provided between the adapter and a flange at the upper end of the bottomed bucket by a coupling inserted into the coupling mounting hole provided in the adapter, and a coupling provided with the adapter and the flange of the stabilizer; A structure for joining the expanded bottom bucket and the stabilizer by joining with a joining tool inserted into a fixture mounting hole.拡底 bucket device adapter characterized in that it comprises.