JPH02104894A - Excavator - Google Patents

Abstract

PURPOSE:To connect a casing with an auger screw without the needs to move a driving mechanism upwards by a method in which the casing is thrust through a base for setting, a vertical vibration is applied to the periphery of the casing by a rocking press-in device, and a rotation face is given to the periphery of blades through a chuck by a driver in the auger screw. CONSTITUTION:A vertically movable cylinder 4, a chuck device 5, and a rocking cylinder 7 are set on the base 1 constituting a rocking press-in device 9 coupling with the periphery of a casing 8. A vertically movable cylinder 10 is erected on both sides of the device 9, and the driver 12 of an auger screw 11 is supported over the device 9 by the cylinder 10. The driver 12 consists of a drive motor 13, a transmitter 14 connected to the motor 13, and a chuck device 15 turning through the transmitter 14. When the cylinder 10 is freed from extended state, the whole of the driver 12 goes down along the leader 6a of a leader mast 6 to presses down even the auger screw 11 through the chuck device 15, and the auger screw 11 turning excavates and discharges soil in the casing 8.

Description

[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD The present invention relates to a drilling device used for excavating pile holes and the like.

[Conventional technology]

A casing organ method is known in which a casing is placed outside the screw when excavating with an auger screw for pile construction.

The excavation equipment used in this construction method is a drive device that runs between the top and bottom along a long league mast, and both a screw drive drive device and a casing drive drive device are connected to form an integrated drive device.

(Problem to be Solved by the Invention) In the drive device used in such a conventional casing organization method, when adding the auger screw and casing, the drive device is raised along the league mast, and the new adding member is vertically moved. There must be enough space for it to fit.

Therefore, work at heights is required, and the heavy drive device is located above, resulting in an unstable situation where the center of gravity is high.

In order to eliminate such drawbacks, it is conceivable to separate the drive device for the screw and the drive device for the casing so that the drive device for the casing can be kept at a relatively low position even when adding screws and casings. In this case, the casing drive device is one that rotationally drives a tick device that grips the outer periphery of the casing.

However, even with this type of drive device, the screw drive device must be raised to a high place when adding an auger screw, and this does not completely eliminate the need for work at high places and unstable conditions. Not done.

An object of the present invention is to eliminate the disadvantages of the conventional example, and to be able to add casings and auger screws without moving the drive mechanism upwards, thereby eliminating the need for work at heights and achieving high league masts. It is an object of the present invention to provide an excavating device which can be omitted and which can be made small and compact as a whole.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a swing pushing device on a pedestal that engages with the outer circumference of a casing that is set so as to pass through the pedestal, and The drive device of the auger screw, which consists of a chuck device for the outer periphery of the screw blade of the screw, a drive motor for rotationally driving the same, and a transmission mechanism thereof, is supported by an elevating cylinder and mounted on a pedestal so as to straddle the swinging pushing device. The gist of this document is that it has been established.

[Effect]

According to the present invention, the casing is set so as to pass through the pedestal, and the outer circumference is given vertical vibration by the swing pushing device, and is inserted into the ground.

Further, the auger screw, which is inserted from above within the casing, is rotated by a driving device applying rotational force to the outer periphery of the blade portion via a chuck device.

At the same time, when the elevating cylinder, which is extended, is released, the drive device supported by this cylinder is lowered, and the entire auger screw is also pushed down by the chuck device. In this way, the auger screw is driven to rotate and excavates and discharges the earth and sand inside the casing. Also, since the upper end of the auger screw protrudes above the drive device, it is possible to add screws without moving the drive device.

〔Example〕

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

FIG. 1 is a partially cutaway front view of an excavation apparatus according to the present invention. In the figure, 1 is a frame equipped with an outrigger 2 on the outer circumferential side, and a through hole 3 is formed in the center.

A vertically movable cylinder 4 is installed on both sides of the through hole 3 on the frame 1, and a chuck device 5 is installed on the outer periphery of the casing 8.
A short league mast 6 is erected on the pedestal 1, and the lower part of the league mast 6 and the chuck device 5 are connected by a swing cylinder 7. These vertically movable cylinder 4, chuck device 5, and swinging cylinder 7 constitute a swinging pushing device 9 that engages with the outer peripheral portion of the casing 8.

Furthermore, lifting cylinders 10 are installed on both sides of the swinging pushing device 9 on the gantry 1, and the driving device 12 of the auger screw 11 is moved by the lifting cylinders 10 to the swinging pushing device 9.
It was supported as if straddling it.

The drive device 12 of the auger screw 11 includes a drive motor 13, a reduction gear as a transmission mechanism 14 connected thereto, and a chuck device 15 that rotates via this gear.

In the chuck device 15, a pressing plate 17, which is formed by vertically dividing a cylinder having a smaller diameter than the cylinder 16, is disposed in a rotary cylinder 16 having the gear on the outer periphery, and an arm 18 is attached to the pressing plate 17. The cylindrical body 16 is provided so as to protrude from the inside to the outside, and the outer end of the arm 18 is tapered, and this tapered surface is brought into sliding contact with the inner tapered surface of the ring body 19. Further, the ring body 19 is supported by an elevating cylinder 10, and is vertically movably supported by a chuck cylinder 22 which is erected on a pedestal 20 having a through hole 21 in the center.

Further, this pedestal 20 is engaged with the leader 6a of the league mast 6 on the pedestal 1 so as to be able to move up and down.

In the figure, reference numeral 23 denotes a swivel connected to the upper end of the auger screw 11 for feeding cement milk or the like into the auger screw 11 and causing it to protrude from the tip.

Next, usage and operation will be explained.

The casing 8 is set to pass through the pedestal 1 through the through hole 3, and its outer periphery is attached to the chuck device 5.
Grip with.

Then, by applying vibration to the casing 8 via the chuck device 5 with the swing cylinder 7 and retracting the vertical cylinder 4, the casing 8 is inserted into the ground.

At the same time, if the auger screw 11 is inserted into the casing 8 and the chuck cylinder 22 is extended, the ring body 19 will rise, and the arms 18 will move closer to each other due to the wedge effect, so that the pressing plate 17 will move the auger screw 11 The auger screw 11 is pressed against the outer periphery of the screw blade 11a, and the auger screw 11 is gripped by the chuck device 15. The rotational torque of the drive motor 13 is transmitted to the rotating cylinder 16 via the transmission mechanism 14, and together with this rotating cylinder 16, the arm 18
By rotating the press plate 17, the auger screw 1
1 also rotates.

Furthermore, when the elevating cylinder 10 is released from the extended state, the entire drive device 12 descends along the leader 6a of the leader streak 6, and the auger screw 11 is also pushed down via the chuck device 15, driving the rotation. The auger screw 11 excavates and discharges the earth and sand inside the casing 8.

In this way, once the auger screw 11 has been pushed in by the stroke of the lifting cylinder 10, the chuck cylinder 22 is retracted and the ring body 19 is lowered to free the chuck device 15 and the drive device 12 is raised again by the cylinder 10. Then, the upper screw blade 11a is grasped again and the same operation is repeated, and as a result, the auger screw 11 is successively fed.

After inserting the required length auger screw 11, add to it, but in that case, the auger screw 11
Since the upper end of the member protrudes above the drive device 12, the additional member can be set by lifting it with a crane or the like in that state.

[Effects of the Invention] In the drilling equipment of the present invention as described above, the rotational drive of the auger screw is performed via the chuck device on the outer periphery of the screw blade. First, it is possible to work in stable conditions.

Furthermore, since there is no need to move the drive device up and down significantly, a long league mast is not required, and since the casing is inserted by a swinging device, this device can be housed under the drive device. As a result, the entire device is compact and can be mounted on a stand, making it highly versatile and usable even in narrow spaces.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing one embodiment of the excavation equipment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a plan view of a casing swinging device, and Fig. 4 is an auger crevice. FIG. 5 is a longitudinal sectional side view of the drive device, FIG. 5 is a view taken along the line A-AwA in FIG. 4, and FIG. 6 is a view taken along the line B-B in FIG. 1... Frame 2... Outrigger 3...
・Through hole 4... Vertical cylinder 5... Chuck device 6... League mast 6a... Leader 7... Rocking cylinder 8... Casing 9...-
Swinging pushing device 10... Lifting cylinder 11... Auger screw 11a... Screw blade 12...
Drive device 13... Drive motor 14... Transmission mechanism 15.
...Chuck device 16...Rotating cylinder body 17...Press plate 18...Arm 19...Ring body
20... Frame 21... Through hole 22
...Chuck cylinder 23...Swivel

Claims (1)

[Claims] A swing pushing device is provided on the pedestal frame to engage with the outer periphery of the casing that is set to pass through the pedestal, and a chucking device for the outer periphery of the screw blade of the auger screw, a drive motor for rotationally driving the chucking device, and its transmission. 1. An excavation device characterized in that an auger screw driving device comprising a mechanism is supported by an elevating cylinder and provided on a pedestal so as to straddle the swinging pushing device.