JP2568790Y2 - Automatic coupling device of excavating rod in excavator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an automatic excavating rod connecting device for excavating a screw auger, a casing auger, and other excavators (hereinafter collectively referred to as excavating rods). About.

[0002]

2. Description of the Related Art Heretofore, as an excavator for performing excavation work by adding this kind of excavation rod, for example, Japanese Patent Publication No. Sho 63-56
There is one described in Japanese Patent Publication No. 398. The excavator disclosed in this publication automatically connects an upper end of a drilling rod to an output shaft of a driving unit supported on a tower so as to be able to move up and down.

As means for automatic connection, a lock member is protruded and retracted from a direction (horizontal direction) perpendicular to the excavation rod, and the output shaft of the drive unit and the excavation rod are connected by the lock member so as to rotate integrally. is there.

[0004]

However, in the above-mentioned conventional structure, the locking member is caused to protrude and retract from the side in the horizontal direction, so that the lateral outer shape of the device becomes large, and as a result, it is supported for excavation work in a narrow work site. In addition, in a so-called multi-axis auger in which a plurality of excavating rods are juxtaposed, there is a problem that the interval between the rods is too wide and it is difficult to implement.

[0005] In view of the above, the present invention has been made to provide an automatic connecting apparatus for excavating rods in an excavator, which can make the lateral outer shape of the apparatus as small as possible.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention has an object to connect a drilling rod to a drive unit which can move up and down along a tower, and rotate the drilling rod. In an excavator that drills a vertical hole in the ground by driving, an inner rod connected to the output shaft of the drive unit and hanging therefrom, and the outer rod is non-rotatably and axially slidably fitted to the inner rod. An outer rod suspended and supported by a cylinder on the drive unit, and a female joint for excavation rod connection at a lower end of the inner rod,
A rotating cylinder having an engaging portion that is detachable from the engaging portion of the male joint portion of the excavating rod is rotatably and vertically immovably mounted on the female joint portion. It is characterized in that it is linked to rotate by a required angle by movement.

[0007]

When the drive unit is lowered, the lower female joint is fitted to the male joint at the upper end of the excavating rod to be added, and when the drive unit is further lowered, the engaging portion and the locking portion of both joints are engaged. Are inserted by passing each other. Then, when the cylinder is extended and the outer rod is lowered, the rotating cylinder of the female joint rotates in conjunction with this, whereby the locking portion of the rotating cylinder engages with the engaging portion of the male joint to pull out. It is connected to the stop state.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. The excavator has a drive unit 3 that can move up and down along a tower 2 erected on a work machine 1 as shown in FIG. 1 as a side view of an example thereof. The wire rope 5 is hung by a winch 6 on the working machine 1 and suspended by a wire rope 5 passing through a sheave 4.

An inner rod 8 is connected to the output shaft 7 of the drive unit 3 as shown in section in FIG. 2, and is suspended therefrom. An outer rod 9 having a required length is attached to the inner rod 8 by a key 10 and a key groove. 11, the inner rod 8 is fitted to the inner rod 8 so as to be non-rotatable and slidable in the axial direction.

The outer rod 9 is connected to the drive unit 3 by the cylinder 1.
2 and 12, the cylinders 12 and 12
, The outer rod 9 can be moved up and down over a predetermined distance.

A hexagon socket female joint 13 is provided at the lower end of the inner rod 8, and a rotating cylinder 14 is rotatable around the outer periphery of the female joint 13 via bearings 15 and 16 (bush). It is fitted and mounted in the axial direction immovably.

The upper part of the rotary cylinder 14 is inserted between the inner rod 8 and the outer rod 9, and the rotary cylinder 14 is rotated by a required angle by the vertical movement of the outer rod 9. As an example of the rotating means, an inclined groove 17 inclined with respect to the axis as shown in FIG.
17 are provided at symmetric positions on the diameter line.
17, a projection 18 projecting from the lower inner surface of the outer rod 9;
18 is inserted and the rotary cylinder 1 is moved in accordance with the vertical movement of the outer rod 9.
4 is given a rotation. The installation relationship between the inclined grooves 17, 17 and the projections 18, 18 may be reversed.

As shown in FIG. 7, a plurality of (six in the figure) locking portions 19, 19,... Project toward the axis at intervals 20, 20,. Has been established,
A plurality of (six in the figure) engaging portions 23 projecting from the outer periphery of the base of the male joint portion 22 at the upper end of the excavating rod 21 at intervals 20, 20,. (FIG. 8) is arranged to pass through.

When the outer rod 9 is raised, the intervals 20, 20,... Of the locking portions 19, 19, and the engaging portions 23, 23,. , 12..., 12, the projections 18, 18 and the inclined grooves 17, 17 rotate the rotary cylinder 1.
When the rotary member 4 is rotated by a required angle, the engaging portions 23 are overlapped on the upper surfaces of the locking portions 19, 19, and are prevented from being removed.

In FIG. 1, 24 is a stay, 25 is a vibration damper, 26 is a guide rail disposed along the tower 2,
27, 27 are engaged with the guide rail 26 to
It is a guide that supports.

Next, the operation of the above embodiment will be described with reference to FIGS. In order to connect the excavating rod 21 to the output shaft 7 of the driving unit 3, the positions of the hexagonal holes of the female joint 13 and the male joint 22 are adjusted as shown in FIG. Then, the drive unit 3 is lowered to insert the male joint 22 into the female joint 13 (FIG. 9B).

Further, the drive unit 3 is lowered, and the female joint 13
And the engaging portions 23, 2 of the male joint portion 22
3 ... (Fig. 10 (A)), and then extend the cylinders 12, 12 to lower the outer rod 9 (Fig. 10 (B)). 14 descends in the inclined grooves 17, 17, so that the rotary cylinder 14
Of the female joint 13 as a result,
The engaging portions 23 of the male joint portion 22, 23,.
Are positioned so as to overlap, and are connected in a retaining state. When the output shaft 7 is rotated by the drive unit 3 in this way, the excavation rod 21 is integrally rotated by the non-rotational fitting of the female joint 13 and the male joint 22, and the ground can be excavated.

When the outer rod 9 is pulled up by the cylinders 12 and 12 to release the connection of the excavating rod 21, the rotary cylinder 14 rotates in the opposite direction to the above, and the locking portions 19 and 19 of the female joint portion 13 are rotated. .. May be aligned with the engagement portions 23 of the male joint portion 22 so as to raise the drive unit 3.

In the illustrated embodiment, the case where the fitting portion between the female joint portion 13 and the male joint portion 22 is hexagonal and non-rotationally fitted is described. However, this may be an appropriate polygonal shape. Other components are not limited to the illustrated embodiment.

[0020]

As described above, according to the present invention, since the connecting portion does not protrude in the lateral direction, the width of the peripheral surface of the connecting portion does not increase, and the connecting portion can be made compact. In particular, when the present invention is applied to a multiaxial auger, the arrangement interval of the augers can be reduced. Further, since the connection of the excavating rod can be performed only by the vertical movement of the outer rod without requiring any other power, there is an effect that the structure is simple and the cost is low.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an excavator to which the present invention is applied.

FIG. 2 is a sectional view of an output shaft side of a driving unit.

FIG. 3 is a front view of an upper end of a drill rod.

FIG. 4 is a side view of a rotating cylinder portion.

FIG. 5 is a sectional view corresponding to a portion A in FIG. 2;

FIG. 6 is a sectional view corresponding to a portion B in FIG. 2;

FIG. 7 is a bottom view corresponding to a portion C in FIG. 2;

FIG. 8 is a sectional view corresponding to a portion D in FIG. 3;

FIGS. 9A and 9B are explanatory diagrams of an operation.

FIGS. 10A and 10B are operation explanatory diagrams.

[Explanation of symbols]

 Reference Signs List 3 Drive unit 7 Output shaft 8 Inner rod 9 Outer rod 12 Cylinder 13 Female joint 14 Rotating cylinder 17 Inclined groove 18 Projection 19 Locking unit 20 Spacing 21 Drilling rod 22 Male joint 23 Engagement

Claims (1)

(57) [Scope of request for utility model registration] An excavator in which an excavating rod is connected to a drive unit which can move up and down along a tower, and which drills a vertical hole in the ground by rotating the excavation rod. The excavator is connected to an output shaft of the drive unit. An inner rod that is suspended and is non-rotatably and axially slidably fitted to the inner rod,
An outer rod suspended and supported by a cylinder in the drive unit, a lower end of the inner rod is provided with a female joint for connecting a drill rod, and the female joint includes a male joint of the drill rod; A rotatable cylinder having a detachable engaging portion at the joint is rotatably and immovably mounted vertically, and the rotatable cylinder is linked so as to rotate by a required angle by up and down movement of the outer rod. Automatic connecting device of excavating rod in excavator.