JPS6235750Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is suitable for a bucket excavator that excavates and takes in soil by pushing the bucket while taking a reaction force on the hole wall surface, and is particularly suitable for excavating and taking in earth and sand in a casing that has been press-fitted into the ground in advance. Regarding bucket excavators.

The present invention provides a bucket excavator equipped with a screw so that digging and soil can be effectively carried out by pushing the bucket.The details of the present invention will be explained below with reference to the drawings.

In FIG. 1, a hydraulic cylinder 3 for pushing the bucket is fixed vertically to the lower end wall of a hollow cylindrical holder 1, and the upper end wall of the cylindrical bucket 2 is fixed to the tip of the ram 4 of the cylinder 3. Bucket 2
are connected on the same axis.

The holder 1 has brackets 6, 6 protruding from the upper end wall within the cylindrical body 5, and one end of the locking pieces 7, 7 for taking up reaction force is connected to the brackets by pins 8, 8.
are supported so that they can swing freely in the radial direction,
The locking surfaces 9, 9 of both locking pieces 7, 7 can be moved outwardly through windows 10, 10 on the peripheral wall of the body 5, and a hydraulic cylinder 11 for driving the locking pieces is provided on the lower end wall of the body 5. The tip of the ram 12 is fixed and the cylinder 1 is
1 is positioned between the locking pieces 7, 7, and an inclined cam 14, which contacts the inner side of the locking pieces 7, is attached to the outer peripheral surface of the cover 13 fitted on the cylinder 11.
14 is provided protrudingly, and when the cylinder 11 is driven forward and backward, the locking pieces 7, 7 are fixed to the body 5 by the action of the cams 14, 14.
It is designed so that it can move forward and backward from the outer peripheral surface of the.

The bucket 2 is a cylindrical body with a slightly larger diameter than the holder 1, and a hydraulic motor 16 is installed in a housing 15 with an opening at the lower end formed on the upper end wall, and the opening of the housing 15 is closed with a lid 17. 16 drive shafts protrude into the bucket 2, and the shaft of a screw 18 located concentrically within the bucket 2 is connected to the protruding end thereof. The screw 18 extends to a position slightly protruding from the lower end of the opening of the bucket 2, and has digging blades 19 protruding from the lower ends of its blades.

At the open lower end of the bucket bag 2, caps 20, 20, each having a roughly split conical shape, are attached to the caps 20, 20 so as to be openable and closable by means of hinges 21, 21, and hydraulic cylinders 22, 22 are installed on the upper surface of the upper end wall of the bag bag 2 as a driving means for opening and closing the caps. The ram 2 is fixed against the peripheral wall, and the ram 2
The lower ends of the connecting rods 24, 24 connected to the caps 3, 23 are connected to positions near the hinges 21, 21 of the caps 20, 20, and when the caps 20, 20 are opened by the advance drive of the cylinders 22, 22, the caps is positioned substantially on an extended surface of the outer peripheral surface of the bucket bag 2, as shown by the chain line in FIG.

The function of this machine will be explained along with usage examples. As shown by the chain line in FIG. 2, a large-diameter casing C made of a steel pipe is press-fitted into the ground F, and a small-diameter hole H is drilled at the axial center position within the casing C. The proposed bucket excavator is suspended by a wire W using a crane, etc., and the caps 20, 20 are first opened by driving the cap opening/closing cylinders 22, 22 forward, and in this state, the machine is moved into the casing C to a position where it contacts the earth and sand. The locking pieces 7 are inserted and lowered, and the locking pieces 7, 7 are advanced outward by the advancement drive of the locking piece driving cylinder 11, and the locking surfaces 9, 9 are locked with the inner wall surface of the casing C. Next, the screw 18 is rotated by starting the hydraulic motor 16, and then the bucket 2 is driven by advancing the bucket pushing cylinder 3.
gradually descend. Due to this descent, the bucket 2 uses the open caps 20, 20 as cutting tips to press into the earth and sand along the inner wall surface of the casing C, guide the earth and sand to the bucket opening, and at the same time remove the earth and sand sent to the bucket opening. The excavating blades 19 of the rotary screw 18 are used to excavate the material, and the screw 18 is used to transport the material upward in the bucket 2.

When the bucket is pushed in once, the cylinders 22, 22 are driven backward to move the caps 20, 20.
is closed, and then the locking pieces 7, 7 are released from the casing C by the backward drive of the cylinder 11, and then the machine is pulled up from the inside of the casing C and transported to the soil unloading position, where the cap 20, Open 20,
When the screw 18 is rotated in the reverse direction, the earth and sand in the bucket 2 is discharged. After removing the earth, the machine is again inserted into the casing C and lowered, and the same operation as described above is repeated.

According to the bucket excavator with a screw of this invention, when the bucket is pushed into the ground and the earth and sand are guided into the bucket mouth, the earth and sand is conveyed upward in the bucket by the rotating screw, thereby ensuring that the earth and sand can be easily and easily excavated into the bucket. It can be internalized and is extremely effective in practical terms.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a longitudinal sectional view of the bucket in the retracted state, and FIG. 2 is a longitudinal sectional view of the bucket in the extended state. DESCRIPTION OF SYMBOLS 1... Holder, 2... Bucket, 3... Hydraulic cylinder for pushing the bucket, 7... Locking piece for taking reaction force, 16... Hydraulic motor, 18... Screw,
20...cap.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylindrical bucket is attached to the lower end of a holder equipped with a plurality of reaction force-absorbing locking pieces that are movable outwardly from the outer circumferential surface of the holder, and a cylindrical bucket is inserted into the holder through an advancing/retracting drive means for pushing the bucket. A bucket excavator with a screw, which is connected on the same axis as the screw, a screw is installed concentrically within the bucket, and is equipped with a motor that transmits rotation to the screw.