JPH0823256B2 - Automatic earth removal drilling bucket - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic earth-drilling bucket for excavating earth and sand by excavating by an earth drill method or the like.

[0002]

2. Description of the Related Art A ground drilling method is known in which earth is excavated by a drilling bucket to form a shaft hole, earth and sand are taken into the drilling bucket, pulled up to the ground, and discharged during earth foundation work. ing. As a drilling bucket used for this earth drill method,
For example, there is shown in FIGS. 13 to 15 (especially
( See Japanese Patent Publication No. 2-59917). In FIG. 13, reference numeral 101 is a drive shaft member connected to the kelly bar,
The drive shaft member 101 is spline-coupled to the driven portion 103 provided on the support frame portion 102a of the bucket body 102. Further, the drive shaft member 101 is provided with an actuating arm 104, and a hitting arm 105 is disposed opposite to the actuating arm 104 so that the hitting arm 105 can come into contact with the actuating arm 104. The hitting arm 105 is provided on the bucket body 102. Is formed integrally with the. A stopper 107 is provided at the tip of the operating shaft 106, and the stopper 107 is detachably engaged with a receiving portion 109 of a bottom lid 108 that is openably and closably attached to the bucket body 102.

When the drive shaft member 101 is rotated (normally rotated) in the direction of arrow A in the figure by the kelly bar, the bucket body 10 is rotated.
The earth and sand are excavated by 2. Excavated earth and sand is bottom cover 1
In order to pull up the earth and sand excavated inside the bucket body 102 from the opening of No. 08 and remove the earth, the kerry bar is rotated (reversed) in the direction opposite to the arrow A direction, and the drive shaft member 10 is rotated.
As shown in FIG. 15, the play space 110 is provided between the 1 and the driven portion 103, so that the operating arm 104 rotates from the solid line position to the chain line position in FIG. 14 to rotate the hitting arm 105. Become. The operating shaft 106 also rotates at the same time, the stopper plate 107 is disengaged from the catch plate 109, the bottom lid 108 is opened, and the earth and sand therein is discharged. Also, when the drive shaft member 101 is rotated in the direction of the arrow A in the drawing and suddenly stopped by the kelly bar, the earth and sand in the bucket body 101 are discharged by the same operation as described above.

[0004]

However, in such a conventional automatic drilling bucket, the operating arm 104 comes into contact with the hitting arm 105 when the drive shaft member 101 is normally rotated for excavation. Therefore, it does not rotate the operating shaft 106 to open the bottom cover 108, but when it encounters an underground obstacle such as pebbles, driftwood, old piles, and rattles, or becomes unable to rotate, or When the formation is soft and the wall of the excavated shaft hole overhangs and the bucket body 102 is retained in this shaft hole, the drive shaft member 101 must be forced to reverse. Then, the operating arm 10
4 makes contact with the contact arm 105 to rotate the operating shaft 106,
The bottom lid 108 will be opened. If the bottom cover 108 opens in the shaft hole during excavation, the bottom cover 108 acts as an anchor in the shaft hole, making it difficult to pull up the bucket body 102 from the shaft hole. There was a problem that

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic earth-drilling bucket in which the bottom lid does not open even if the drive shaft member is unavoidably rotated in the reverse direction or the bucket is rotated in a suspended state. .

[0006]

In order to achieve such an object, according to the present invention, a drive shaft member which is connected to a kelly bar and receives a rotational drive force, and which is fixed to the drive shaft member and integrally rotates. A wing member, a driven portion slidably supporting the drive shaft member and provided on the bucket body, and an upper portion formed so that the wing member is loosely fitted to the driven portion and engaged with the wing member. A moving section that has an engaging section and a lower engaging section, is located between the upper engaging section and the lower engaging section, and that the wing member is movable from the upper engaging section or the lower engaging section. An operating space that also has a hitting arm, a hitting arm that comes into contact with the wing member and is biased in a fixed direction, and an actuating shaft that opens the bottom lid of the bucket body when the hitting arm is attached and turned. wherein the transfer of said blade member
When the drive shaft member is pushed down or pulled up, the wing member moves in the working space to protrude from the driven portion through the moving section to contact the hitting arm, and the lower engaging section or the upper section. The drive shaft member and the driven portion are engaged with the engaging section so as to be integrally rotatable.

[0007]

When the bucket body encounters an underground obstacle and becomes unrotatable during excavation, the bucket body must be reversed, but the wing member is located in the lower engagement section and engages with the driven portion. By doing so, it is possible to reverse with the bottom lid locked. Next, if the ground is soft while pulling the bucket body from the shaft hole, the hole wall may overhang and the bucket body may be retained inside. At this time,
Since the wing member is located in the upper engagement section, the drive shaft member can be rotated in the forward and reverse directions to escape from the detained state while the bottom lid is locked.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 8 are views showing a first embodiment of an automatic earth unloading drilling bucket according to the present invention.

In FIG. 1, reference numeral 1 is a drive shaft member having a socket 1a into which a Kerry bar (not shown) having a substantially square cross section is fitted and engaged, and the drive shaft member 1 is located at the upper center of the bucket body 2. The wing members 3 and 4 are fixed to the center of the peripheral side wall. Further, at the center of the upper side of the bucket body 2, a driven portion 5 in which the drive shaft member 1 is rotatably and slidably inserted is fixed.

As shown in FIGS. 2 and 3, a pair of working spaces 6 in which a pair of wing members 3 and 4 are respectively located in the main drive section 5.
7 are formed. Here, when the drive shaft member 1 is pushed down, it slides downward with respect to the driven portion 5, but the wing members 3, 4
Also moves downward. As shown in FIG. 3, a lower engagement section 8 is formed on the lower side of the working space 6 so that the wing member 3 engages with the driven portion 5 when the wing member 3 moves downward. The wing members 3 located in the lower engaging section 8 are the first and second
It abuts against the stopper walls 5a and 5b, and at this time, even if the drive shaft member 1 is rotated (normally rotated) in the direction of arrow B in FIG.
Or even if it is rotated in the opposite direction (reverse rotation), the driven portion 5
Immediately rotate in the reverse direction.

When the drive shaft member 1 is pulled up,
An upper engagement section 9 is formed on the upper side of the operation space 6 so that the wing member 3 also moves upward and the wing member 3 engages with the driven portion 5. Even when the wing member 3 is located in the upper engaging section 9, the wing member 3 contacts the first and second stopper walls 5a and 5b, and the driven portion 5 is similarly rotated in the forward and reverse directions by the drive shaft member 1.

Between the lower engaging section 8 and the upper engaging section 9 of the working space 6, the wing member 3 is moved in the working space 6 in the direction of the arrow B as shown in FIGS. 3 and 4. A moving section 10 is formed so as to be movable in the opposite direction, and a storage section 11 is formed on the moving direction side. The lower as well to working space 7
Part engagement sections, upper engagement sections, moving sections and storage sections are formed.

As shown in FIG. 2, on the storage compartment 11 side of the working space 6, a contact arm 13 is disposed so as to face each other, and the tip of the wing member 3 protruding from the outer peripheral wall of the driven portion 5 passes through the moving compartment 10 and is stored. When it moves to the compartment 11, it hits the hitting arm 13. Since the tip end of the hitting arm 13 is formed thick, the hitting arm 13 comes into contact with the wing member 3 in any position of the storage compartment 11.
The hitting arm 13 is fixed to an actuating shaft 14 rotatably supported on the side of the bucket body 2. In addition, hitting arm 1
3 always receives a counterclockwise biasing force. Working shaft 14
As shown in FIG. 5, a stopper plate 15 is attached to the lower end side of the stopper plate 15, and the stopper plate 15 is fitted / engaged with a stopper hole 16 a of a receiving plate portion 16 as shown in FIGS. 6 and 7. The receiving portion 16 has a twisted guide portion 16b and is provided on a bottom lid 17 attached to the lower side of the bucket body 2 so as to be openable and closable (swingable). Actuating shaft 14, stopper plate 1
5 and the receiving part 16 constitute a locking mechanism for locking the bottom lid 17 to the bucket body 2. The stopper 15
When the actuating shaft 14 is rotated, it is disengaged from the receiving portion 16, and the bottom lid 17 can be opened from the bucket body 2.

When the drive shaft member 1 is pushed down by the kelly bar in order to excavate the shaft hole in the ground, the drive shaft member 1 slides in the driven portion 5 and the wing member 3 operates in the working space 6 as shown in FIG. To the lower engaging section 8 (shown by the solid line in FIG. 8), and the wing member 3 engages with the driven portion 5. Here, since the wing member 4 operates in the same manner, only the wing member 3 will be described. When the drive shaft member 1 is normally rotated, the bucket body 2 is normally rotated, and the earth and sand are excavated and taken into the inside. If the bucket body 2 encounters the underground obstacle and becomes unrotatable during this excavation, the bucket body 2 must be reversed, but the wing member 3 is engaged with the driven portion 5 as described above. It can be reversed. At this time, since the wing member 3 is located in the lower engagement section 8, there is no need to move the moving section 10 to the storage section 11 to rotate the hitting arm 13, and the bottom lid 17 remains locked. Up to.

Next, when the bucket body 2 is filled with earth and sand and becomes full, the drive shaft member 1 is pulled up to pull up the bucket body 2 from the shaft hole and discharge the soil. Then, the wing member 3 moves to the upper engagement section 9 (indicated by a one-dot line in FIG. 8) and similarly engages with the driven portion 5. If the ground is soft while pulling the bucket body 2 out of the shaft hole, the hole wall may be pulled out and the bucket body 2 may be retained inside. At this time, the drive shaft member 1 is normally and reversely rotated to escape from the detained state. Also at this time, similarly, the wing member 3 does not rotate the hitting arm 13, and the bottom cover 17 remains locked.

When the bucket body 2 is taken out from the shaft hole, the bucket body 2 is softly landed on the ground or the bed of a dump truck. When the drive shaft member 1 is gently rotated in the reverse direction and pulled up, the wing member 3 moves from the lower engagement section 8 through the movement section 10 to the storage section 11 (FIG. 8).
Shown by the chain double-dashed line). At this time, the wing member 3 hits the arm 13
Abutting against and rotating it clockwise in FIG.
The stopper plate 15 is disengaged from the engagement with the metal part 16 via 4 and the bottom cover 7 is unlocked. When it is subsequently pulled up, the bottom lid 7 is opened and the earth and sand in the bucket body 2 are discharged.

Next, when the bottom cover 7 is closed, the bucket body 2 is soft-landed on the ground or the loading platform of the dump truck, and the wing member 3 moves from the broken line position in FIG. 8 to the alternate long and two short dashes line position. Subsequently, when the drive shaft member 1 is rotated clockwise, the wing member 3 passes through the moving section 10 and the lower and upper engaging sections 8,
After moving in the nine directions, the hitting arm 13 is pulled back by the spring and returned from the position indicated by the chain double-dashed line to the position indicated by the solid line, and the catch 15 is hooked on the catch 16 to lock the bottom lid 17. At this time, when soil or the like is caught between the bottom lid 17 and the bucket body 2, the stopper 15 does not rotate and is not locked even if the wing member 3 moves in the direction, and the bucket body 2 is not locked. The bottom lid 17 is opened when the is lifted. At that time, when the bucket main body 2 is lowered again, the stopper plate 15 rotates along the slope of the guide portion 16b to the position of the stopper hole 16a of the receiving plate portion 16 and is locked. When the lock is incomplete, pulling up the bucket body 2 opens the bottom lid 17, and then the stopper plate 15
Is urged by the spring in the hooked position, so when there is no guide portion 16b, the bottom lid 17 is in this position.
Even if the bucket main body 2 is soft-landed to close the stopper 2, the stopper 15 and the stopper hole 16a of the receiving portion 16 are different in position, so that the stopper 15 cannot be joined. In order to connect them, the wing member 3 must be moved again in the opposite direction to the soft landing, and the operation is complicated. However, the guide portion 16b makes it unnecessary to rotate the wing member 3 to align the position of the stopper plate 15,
Handling is simplified.

Next, a second embodiment of the automatic drilling bucket according to the present invention will be described with reference to FIGS. 9 to 12.
The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the bucket body 2 is large. Since the lock mechanism for locking the bottom cover 17 to the bucket body 12 also needs to be provided on the peripheral side of the bottom cover 17, the hitting arm 13 and the operating shaft 14 are connected by the connecting rod 21 and the auxiliary arm 22. .

[0019]

According to the present invention as described in the foregoing, the working space, engaging the driven portion is blade members move respectively downwards or upwards when raised or tensile When down the drive shaft member A lower engaging section and an upper engaging section which are combined with each other, and between the lower engaging section and the upper engaging section, a moving section in which the wing member moves so as to abut against the contact arm is formed. Since it was formed, if the bucket body encounters an underground obstacle and becomes unrotatable during excavation, the bucket body must be reversed, but the wing member is located in the lower engagement section and engages with the driven part. By doing so, it is possible to reverse with the bottom lid locked. Next, if the ground is soft while pulling the bucket body from the shaft hole, the hole wall may overhang and the bucket body may be retained inside. At this time, the drive shaft member can be rotated in the forward and reverse directions to escape from the detained state while the bottom lid is locked. In this way, during excavation and pulling by the bucket body,
Even if the drive shaft member is unavoidably rotated in the reverse direction, the bottom lid will not open, so it is possible to prevent the bottom lid from acting as an anchor in the shaft hole, and the bucket body can be easily opened from the shaft hole. Can be raised.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of an automatic drilling bucket according to the present invention.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a view taken in the direction of arrow C in FIG.

FIG. 4 is a view on arrow D in FIG.

5 is an enlarged sectional view of a portion E in FIG.

FIG. 6 is a view on arrow F in FIG.

FIG. 7 (a) is a front view of a receiving part, and (b) is a plan view of the same.

FIG. 8 is a development view of a driven portion.

FIG. 9 is a vertical sectional view of the second embodiment.

FIG. 10 is a transverse sectional view of the same.

11 is a view taken along the line HH in FIG.

FIG. 12 is a sectional view taken along line I-I in FIG.

FIG. 13 is a vertical sectional view of a conventional automatic drilling bucket.

FIG. 14 is a plan view of the same.

FIG. 15 is a cross-sectional view showing a connected state of the drive shaft member and the driven portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Drive shaft member, 2 ... Bucket main body, 3, 4 ... Wing member,
5 ... Follower, 6, 7 ... Working space, 8 ... Lower engaging section, 9
... upper engaging section, 10 ... moving section, 13 ... hitting arm, 14
… Operating axis.

Claims (1)

[Claims] 1. A drive shaft member which is connected to a kelly bar and receives a rotational driving force, a wing member which is fixed to the drive shaft member and integrally rotates, and which is provided in a bucket body slidably supporting the drive shaft member. A driven part, an upper engagement section and a lower engagement section which are formed so that the wing member is loosely fitted to the driven section, and which engage with the wing member, and the upper engagement section and the lower engagement section. An operating space that is located between the wing member and the wing member that also has a moving section that is movable from the upper engaging section or the lower engaging section; The hitting arm is energized, and the actuating shaft that opens the bottom cover of the bucket body when the hitting arm is attached and rotated is provided, and the wing member is projected from the driven portion through the moving section to the hitting arm. Abutable and push down the drive shaft member When the blade member is pulled up or pulled up, the wing member moves in the operation space and engages with the lower engagement section or the upper engagement section, so that the drive shaft member and the driven portion can be integrally rotated. And an automatic earth removal drilling bucket.