JP3489976B2 - Circular shaft excavator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubing device for turning a circular casing for excavating a circular shaft for civil engineering work, and a power supply to the tubing device.
The present invention relates to a circular shaft excavator to which a base machine for operating and moving the same is connected. [0002] A tubing device of a conventional circular shaft excavator is known.
The form of connection between the device and the base machine can be divided into the following three types. In the first case, the tubing device is installed alone, and an example is shown in FIG. No. 2 shows a tubing device connected to a base machine equipped with a caterpillar. FIG. 7 shows Japanese Patent Application No. 60-018992 (Japanese Patent Application Laid- Open No. 61-837).
No. 19) . Part 3 obtained by directly connecting the tubing system to a four-wheel tyred base machine, Japanese Patent Application No. flat 2-108399 in FIG. 8 (JP-A-4-53
No. 14) . A single tubing device is easy to set up and install, but requires additional power and a crane and trailer for movement within the workplace. When the tubing device and the base machine are connected, power can be taken out from the base machine, and small movements in the workplace can be performed while the tubing device is attached to the base machine. Also, the base machine can be used as a reaction force body between the press input and rotation of the tubing device. Therefore, it is best for shaft excavators to use the tubing device in connection with the base machine. When a base machine equipped with a caterpillar is used in connection with a tubing device, it is difficult to equip the caterpillar with an outrigger. In addition to the adjustment, a total of three functions of height adjustment are required. FIG. 9 shows an example of this coupling device in Japanese Patent Application No. 8-1602.
92. This coupling device has one adjustment function.
This is a complicated structure because it is too many, and it is a method that we want to avoid as much as possible. In addition, caterpillar-based machines cannot be run on public roads. [0005] A base machine with four-wheel tires is generally easy to mount an outrigger, and the height and inclination of the base machine can be arbitrarily determined by adjusting the outrigger. Especially when the tubing device and the base machine are directly connected, the connecting device becomes unnecessary.However, with this structure, it is not possible to run on public roads, and when the tubing device and the base machine manufactured independently are rigidly connected. There is a possibility that a large stress is generated in the joint portion and the joint is broken. Further, even if the tubing device and the base machine are installed at the same height and inclination, during the operation, displacement of the connecting portion between the two occurs due to sinking of the outrigger or movement of the relative position of the machine. Since the displacement of the tubing device is related to the construction accuracy, it is frequently corrected, but is not usually performed until the base machine is corrected. Therefore, the connecting portion needs to have a function of adjusting the difference between the necessary and unnecessary elements. [0007] It is an object of the present invention to successfully connect a separately manufactured tubing device and a base machine with a sturdy, relatively simple device. Furthermore, this shaft excavator separates the tubing device and the base machine,
Since the base machine can run on a public road by itself, there is an advantage that transportation becomes easy. [0008] As a form of a shaft excavator, a tubing device having many advantages connected to a base machine with four-wheel tires is used. We will develop a high-strength connecting device that uses horizontal and vertical pins so that it can cope with uneven settlement and changes in the relative positions of the two, and so that part of the weight of the base machine becomes a reaction force between press-fitting and rotation of the casing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
FIG. 2 is a side view of a circular shaft excavator to which a base machine 11 is connected, and FIG. 2 is a plan view thereof. The tubing device 1 has a tightening band 2 of a casing (not shown) in the center, and a tightening cylinder 3, a swing cylinder 4 and a press-fitting cylinder 5 are connected to the tightening band 2, The tightened casing is pressed into the ground while being rocked by the rocking cylinder 4 and the press-fitting cylinder 5. The height and inclination of the tubing device 1 are adjusted by the outriggers 6 of the four tubing devices. On the other hand, a jib 12 is provided on the base machine 11, and a grab bucket 13 is suspended from the end thereof. Base machine 1 when connected
1 is pushed up by the outriggers 14 of the four base machines, and the height of the tubing device 1 is adjusted. The tubing device 1 and the base machine 11 are connected by a connecting device 21 to absorb a horizontal twist and a vertical angle difference between the tubing device 1 and the base machine 11 which fluctuate during the work, and a thrust as a press-fit reaction force and rotation. Only the reaction force of the moment is applied from the base machine 11 to the tubing device. The small movement in the workplace can be performed by raising the tubing device 1 with the jib 12 of the base machine 11 and running the base machine. FIG. 3 is a longitudinal sectional view showing details of the connecting device, and FIG. 4 is a horizontal sectional view thereof. An eyepiece 22 is provided on the base machine 11 side, and a clevis 23 is provided on the corresponding tubing apparatus 1 side. A horizontal pin 25 with a hydraulic cylinder is attached to the clevis 23 so that the eyepiece 22 and the clevis 23 can be pin-connected by hydraulic operation. The clevis 23 is attached to a rotating base 24 connected to the tubing device 1 with vertical pins 26.
Hydraulic cylinder with a transverse pin 25 eyepiece is a hydraulic 22
The pin is fitted to the connector. The torsion between the tubing device 1 and the base machine 11 is absorbed by the rotation of the rotary base 24 around the vertical pin 26. When a relative vertical angle difference between the tubing device 1 and the base machine 11 occurs, a hydraulic cylinder is used. It is absorbed by the swing of the attached horizontal pin 25 and the eyepiece 22. In the method of connecting the tubing device 1 and the base machine 11, the tubing device is installed on the ground, the base machine 11 is brought close to the tubing device, and first the hydraulic hose and the operating electric wire (not shown) are connected. Next, hydraulic pressure is supplied from the base machine 11 and the outrigger 6 of the tubing device 1 is operated to adjust the height of the clevis 23 to the base machine 1.
After adjusting the eyepiece 22 to the first eyepiece 22, when the base machine 11 is advanced and the clevis 23 matches the eyepiece 22 of the base machine 11, the horizontal pin 25 with a hydraulic cylinder is inserted by hydraulic operation to complete the connection. Guides for fitting are provided at the tips of the clevis 23 and the horizontal pin 25 with a hydraulic cylinder so that the fitting can be performed even if the fitting positions are slightly different. When the connection is completed, the grab bucket 13 is removed from the jib 12, and the jib 12 is used as a crane to lift the front end of the tubing device 1 with a wire rope (not shown) and move to a predetermined place in the work place for positioning. In order to separate the tubing device 1 from the base machine 11, it is possible to pull out the horizontal pin 25 with a hydraulic cylinder, retreat the base machine 11 slightly and remove the hydraulic hose and the electric wire. During excavation work, the front outrigger 14 of the base machine 11 is loosened, and about half of the weight of the base machine is applied to the connecting device. In this case, as shown in FIGS. 1 to 5, if the horizontal pin 25 with the hydraulic cylinder is positioned before the outrigger 6 of the tubing device 1, the weight of the base machine can be effectively applied as a press-fit reaction force. become. The tubing device press-fits the casing by taking the above-mentioned reaction force and the reaction force 7 shown in FIGS. The torque caused by the swing is applied from the tubing device 1 to the base machine 11 via the vertical pins 26. However, if the total torque is applied to the vertical pins 26, the vertical pins 26 may be damaged by bending stress. In order to prevent this, the outer periphery of the rotary base 24 is supported by the guide 27 so that the vertical pin 26 receives only the downward thrust of the base machine 11. FIG. 5 shows a horizontal pin 25 with a hydraulic cylinder attached to the base machine 11 side. Hydraulic cylinders, it is necessary more the longest stroke, since the operation of the hydraulic cylinder is incorporated into the base machine side (not shown) structure of a hydraulic circuit and operation circuit is the advantage of simplifying. Since the present invention is configured as described above, it has the following effects. Since the base machine uses one with four-wheel tires,
The outrigger of the base machine can be used, and the inclination and height of the tubing device can be adjusted within the operating range of the outrigger. During the operation, the front outrigger of the base machine is loosened so that a part of the weight of the base machine is applied. The connecting device does not need a height adjusting function, and only needs to have a function of absorbing a vertical angle difference and a twist around the longitudinal axis, thereby simplifying the structure. Since the connecting device is provided with a guide for holding the outer periphery of the rotating base and is configured to receive the reaction force of the excavating torque with a small stress, the strength of the connecting portion is greatly increased. Since the horizontal pins for connection are hydraulically fitted, the work is safe and the time for fitting is reduced. A stopper for retaining the pin is not required. When an automobile crane is used as a base machine with four-wheel tires, there is no need to prepare a separate crane truck for crane work in a work place. Unlike a base machine with caterpillars, many base machines with four-wheel tires can run on public roads in many cases, and a trailer is not required to move.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view of a shaft excavator. FIG. 2 is an overall plan view of the shaft excavator. FIG. 3 is a longitudinal sectional view of Example 1 of a connecting portion between the tubing device and the base machine. FIG. 4 is a partial cross-sectional plan view of Example 1 of a connecting portion between the tubing device and the base machine. FIG. 5 is a partial cross-sectional plan view of Example 2 of a connecting portion between the tubing device and the base machine. FIG. 6 is a diagram of a stand-alone shaft excavator. FIG. 7 is a diagram of a shaft excavator using a caterpillar-based base machine. FIG. 8 is a view of a shaft excavator using a base machine with a directly connected four-wheel tire. FIG. 9 is a view of a shaft excavator connecting portion by a base machine with a caterpillar. [Description of Signs] 1 Tubing device 2 Tightening band 3 Tightening cylinder 4 Swing cylinder 5 Press-fit cylinder 6 Outrigger 7 Reaction weight 11 Base machine 12 Jib 13 Grab bucket 14 Outrigger 15 Tire 21 Connecting device 22 Eyepiece 23 Clevis 24 Rotation Base 25 Horizontal pin with hydraulic cylinder 26 Vertical pin 27 Guide

Claims (1)

(57) [Claims 1] A tubing device for excavating a circular shaft and a base machine with four-wheel tires for supplying power to and moving the tubing device with a coupling device. A circular shaft excavator, wherein the coupling device is provided on a surface of the tubing device and the base machine facing each other, the surface facing the base machine.
Two protruding parts are provided in the same direction as the base machine
And eyepiece, the surface of the tubing apparatus, the base machine one vertical pin and said tubing prior Kitate pin guide the outer periphery rotatably provided around a projecting from the same direction as the traveling direction of the and part circular rotating base which is supported in the traveling direction and the rotation direction of the device, provided on both sides of the longitudinal pin definitive to the rotary base, said base
Two clevi connected to two eyepieces on the machine side
Any of the tubing device and the base machine
And the axial direction is perpendicular to the axial direction of the vertical pin.
Pin the eyepiece and the clevis
A circular shaft excavator comprising two connecting horizontal pins.