JP2728360B2 - Auger screw joint joint attachment / detachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint removing device for an auger screw connecting portion used for an SMW (Soil Mixing Wall).

[0002]

2. Description of the Related Art In the conventional method, when a plurality of auger screws are connected to each other and the SMW method is advanced, the lower screw is temporarily supported by a steel material or the like, and the rotation angle and the core of the upper screw are forcibly applied manually. After that, two screws are connected to each other, and two joint pins are fixed in the two pin holes for fastening by manually striking. On the other hand, when the screw was to be cut off, the lower screw was temporarily received, and then the joint pin was manually struck and pulled out.

[0003]

The conventional method has the following disadvantages.

(1) When the lower screw is temporarily received with steel or the like and the upper screw is cut off, the binding force of the lower screw is lost and the core is displaced by the stress of the ground. And labor.

(2) The joint pin is pulled out by hitting it with a hammer or the like. However, a considerable impact force is required, and it is difficult to control the direction of the pin when it comes off, causing the pin to drop. .

(3) Since there are two joint pins, the joint pins may fall off due to an impact during drilling or the like.

(4) Each time the auger screw is connected and disconnected, the joint pin is removed from the screw and stored, so that there is a risk of loss.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a joint detaching apparatus for an auger screw connecting portion, which automates detaching and attaching of a joint pin and prevents detachment and loss of the joint pin.

[0009]

According to the present invention, there is provided a temporary support base provided on an earth auger body so as to be able to move forward and backward with respect to an auger screw, a moving jack for moving the temporary support base back and forth, An auger screw gripping device provided with a clamp provided on the cradle for selectively gripping and fixing the lower auger screw, and an auger screw gripping device provided with a chucking jack for operating the clamp; A frame provided with a detachable attacker for supporting the joint pin and moving the joint pin frame attached to the upper auger screw, and a joint pin detachable jack for moving the frame forward and backward.

[0010]

In the joint detaching device for the auger screw connecting portion configured as described above, the lower auger screw 3 is stopped at a predetermined height and a rotation angle, and the moving jack 1 is moved.
2, the temporary receiving stand 11 is advanced to support the lower auger screw, the chucking jack is extended and gripped and fixed by the clamps 15, 15, and the upper auger screw 3A
When the upper auger screw is ready to be cut off after joining
1 is extended, the frame 20 is moved, and the joint pin frame 24 is pushed to insert or pull out the joint pins 23, 23.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, a plurality of (three in the illustrated example) one-touch joints 2 for attaching and detaching an auger screw 3 are provided on an auger 1 of an earth auger generally indicated by a reference character A. Below the one-touch joint 2, a joint attaching / detaching device indicated by reference numeral B is provided. In the drawing, reference numeral 4 denotes a lifting motor, 5 denotes a stay cylinder, 6 denotes a slide cylinder, 7 denotes a tilt cylinder, 8 denotes a traveling hydraulic motor, and 9 denotes a chain conveyor.

The joint detaching device B is provided with an auger screw gripping device C and a joint pin detaching device D to be described later.

3 to 6, an earth auger 1 is shown.
On the horizontal gantry 10, a temporary receiving gantry 11 of the auger screw gripping device B is slidably supported, and the pair of gripper moving jacks 12 advance the auger screw 3 from the position of FIG. 3 to the position of FIG. It is supposed to be. Outrigger jacks 13 are provided on both sides of the temporary support base 11 to support the load of the auger screw 3 temporarily temporarily selected. Further, joint pin attaching / detaching devices D are provided on both sides of the temporary receiving stand 11.

Referring to FIGS. 7 and 8, a pair of clamps 15 are pivotally mounted by fixing pins 14 on both sides of the temporary support base 11 on the center line including the center of the auger screw 3. The rear ends of these clamps 15
It is connected to a screw chucking jack 17 connected to the temporary receiving stand 11 via 6 and 16. The shape of the clamps 15 and 15 is such that when the jack 17 is extended, the front ends approach each other to grip the auger screw 3 and are integrated with the temporary receiving stand 11 and the concave portion 11a.
The auger screw is opened when 7 is contracted.

Referring also to FIGS. 9 and 10, the frame 20 of the joint pin attaching / detaching device D is slidably supported on both sides of the temporary support base 11 in the front-rear direction, and is slid by the joint pin attaching / detaching jack 21. It has become. The frame 20 is formed with the concave portion 11a and a substantially circular concave portion 20a, and detachable attackers 22 are provided on both sides of the concave portion.

On the other hand, a joint pin frame 24 supporting a pair of joint pins 23 is provided. The frame 24 has a U-shaped recess 25 for accommodating the auger screw 3.
5 protrudes. Also, at the base of the frame 24,
An insertion contact surface 26 is provided, and withdrawal contact surfaces 27, 27 are provided at both ends. The joint pin frame 24 has an upper auger screw 3A.
Is slidably mounted in a direction perpendicular to the axis. That is, the frame 24 is
A, the joint pins 23, 23
Insert and withdraw.

Next, the manner in which the auger screws are connected and disconnected will be described.

First, the auger screw 3 being drilled is stopped at a predetermined height and a predetermined rotation angle.

Next, the gripper moving jacks 12, 1
2 is extended, and the recess 11 a of the temporary receiving stand 11 is engaged with the auger screw 3.

Next, the auger screw 3 is lowered,
The temporary receiving ring 3a is deposited on the temporary receiving stand 11. At this time, the outrigger jacks 13 are extended to support the load of the auger screw 3.

Next, the screw chucking jacks 17 to 17 are extended, the clamps 15 and 15 are closed, and the auger screw 3 is securely gripped.

Next, the one-touch joint 2 is removed, the auger 1 is moved upward, the slide cylinder 6 and the chain conveyor 9 are operated, and the auger screw 3A is moved to connect to the one-touch joint 2. Then, the auger 1 is moved downward to join the two auger screws 3 and 3A.

Next, a jack 2 for detaching and attaching the joint pin
The frame 20 is advanced by extending the frames 1 and 21, and the joint pin 23 is inserted by pressing the contact surface 26 of the joint pin frame 24 with the detachable attacker 22 (FIG. 9).

Finally, the detachable jacks 21, 21 are contracted to retract the frame, the screw chucking jack 17 is contracted, and the clamps 15, 15 are released.
The jacks 12 for moving the gripping device are contracted, and the
Return 1 to the original position and end.

On the other hand, when pulling out the joint pins 23, 23, the auger screw 3 is moved to the position shown in FIG.
The frame 20 is moved forward at the position rotated by 180 ° as shown in FIG. 4 and the joint pins 23 are pulled out by pushing the pull-out contact surfaces 27, 27 of the joint pin frame 24 with the detachable attackers 22, 22.

FIG. 12 shows another example of the joint pin attaching / detaching device. The joint pin clamp 28 of this device D1 is contracted in the direction of arrow a to hold the joint pin frame 24A, and the joint pins 23, 23 are inserted or pulled out. This is an example.

FIGS. 13 and 14 show another example of the joint pin attaching / detaching device. The joint pins 31 embedded in the joint pin frame 30 are rotated by the rotary actuator 29 of this device D2. Of the auger screw 3 with the outer peripheral portion 31a
This is an example in which the connection is made by engaging with the arc-shaped groove portion 3c of FIG. 2B, or the connection is released by the cutout portion 31b of the joint pin 31.

[0029]

Since the present invention is constructed as described above, the auger screw is held by the auger screw holding device to prevent the core from being displaced, and the joint pin is easily detached by the joint pin detaching device. Work can be automated and workability and safety can be improved.

Further, the pair of joint pins are supported by the joint pin frame and provided on the auger screw on the connection side, so that the joint pins can be prevented from falling off or lost.

[Brief description of the drawings]

FIG. 1 is a side view showing an earth auger provided with a joint attaching / detaching device embodying the present invention.

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a top view showing one embodiment of the present invention.

FIG. 4 is a front view of FIG. 1;

FIG. 5 is a side view of FIG. 1;

FIG. 6 is a top view showing a state in which a temporary support base is advanced.

FIG. 7 is a top view showing the auger screw gripping device.

FIG. 8 is a side view of FIG. 7;

FIG. 9 is a top view showing the joint pin attaching / detaching device.

FIG. 10 is a side view of FIG. 9;

FIG. 11 is a top view showing a state when the joint pin frame is pulled out.

FIG. 12 is a perspective view showing another embodiment of the joint pin attaching / detaching device.

FIG. 13 is a top view showing another embodiment of the joint pin attaching / detaching device.

FIG. 14 is an exploded perspective view showing around the joint pin of FIG. 13;

[Explanation of symbols]

 A: earth auger B: joint detaching device C: auger screw holding device D: joint pin detaching device 1: auger 2: one-touch joint 3, 3A: auger screw 3c ..Temporary receiving ring 3b ... hexagonal portion 3e ... arc-shaped groove portion 4 ... motor for lifting / lowering 5 ... stay cylinder 6 ... slide cylinder 7 ... inclination cylinder 8 ... travel hydraulic pressure Motor 9 ... Chain conveyor 10 ... Stand 11 ... Temporary receiving stand 11a ... Recess 12 ... Jack for moving gripping device 13 ... Outrigger jack 14 ... Fixing pin 16 ... Link 17: jack for screw chucking 20: frame 20a: recess 21: jack for detaching joint pins 23, 31: joy Toppin 24, 24A, 30 ... Joint pin frame 25 ... Recess 26 ... Inserting contact surface 27 ... Pulling out contact surface 28 ... Joint pin clamp 29 ... Rotary actuator 31a ...・ Outer circumference 31b ・ ・ ・ Notch

Claims (1)

(57) [Claims] 1. A temporary support base provided on an earth auger body so as to be able to move forward and backward with respect to an auger screw, a moving jack for moving the temporary support base back and forth, and a lower auger provided on the temporary support base and being selectively provided. An auger screw gripping device including a clamp for gripping and fixing a screw, and a chucking jack for operating the clamp, and an upper auger screw provided on the temporary support base so as to freely move back and forth and supporting a pair of joint pins. A joint detaching device for an auger screw connecting portion, comprising: a frame provided with a detachable attacker for moving a joint pin frame attached to the frame, and a joint pin detachable jack for moving the frame forward and backward.