JPS58181996A - Excavator for deep excavation - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deep excavation device suitable for excavating a deep shaft.

As a conventional deep digging excavator, there is a "hard shaft excavator" disclosed in Japanese Patent Application No. 56-83012 filed by the present inventor. Boom 2 on main body 1
A telescopic pipe assembly, that is, a suspension tube 4, is suspended from the tip of the tube via an arm 6, thereby making it possible to vertically raise and lower the suspension tube even in a small-diameter hard shaft. By supporting the hanging tube 4 at the middle part of the outer tube 5 and suspending it vertically, it is possible to extend it upward, making each of the pipes that make up the hanging tube longer and lighter. Since the hanging tube 4 is suspended vertically from the tip of the arm 6 and cannot be swung back and forth, when the tip of the arm is raised high and the hanging tube is fully shortened, the lower end of the earth tool B will be at least on the ground. The length of the hanging tube 4 below the tip of arm 6 must be limited so that it protrudes above the surface, and the length of the hanging tube 4 above the tip of arm B must be limited downward. If it is made longer than a certain length, there is a problem in terms of the stability of the suspension tube to maintain its vertical posture when the suspension tube is in a shortened state, so the overall length of the suspension tube cannot be increased. There was a problem in that there was a limit to the depth that earth tools could reach. However, there was a problem in that the height of the dumper could hardly be accommodated, and the excavated soil had to be loaded using another machine.

SUMMARY OF THE INVENTION An object of the present invention is to provide a boom actuator having a base end and a distal end, the boom actuator being pivoted to a hydraulic excavator body at the base end, in order to obtain a large dump height and increase the excavation depth. It has a boom that can be raised and lowered in a vertical plane by a boom, an arm that is pivotally supported at the tip of the boom and can be swung in a vertical plane by an arm actuator, and one or more The cylinder has a suspension tube inserted in a telescopic manner, and is pivoted to the MiI arm so as to be swingable in the front and back directions on both left and right sides, and the outer tube is pivoted on both the front and rear full sides so as to be swingable in the left and right directions. or a frame body rotatably supported by the arm and pivotally supporting the outer cylinder on both the left and right sides so as to be swingable in the front and rear directions, and fixed to the lower end of the arm and undulating the front n-piboom. and/or a contact member metal that can be brought into contact with the outer cylinder Mi at a position considerably below the center of swing of the frame body or the outer cylinder in the front-rear direction by the swinging of the arm; The purpose of this project is to provide a complete deep-digging excavation device in which an earth tool is attached to the lower end of the innermost cylinder, so that the suspension tube can be shortened to the maximum in a nearly vertical state and then suspended. The tube can be swung together with the arm, so when the hanging tube is shortened, the lower end of the earth tool does not need to protrude to the ground surface, and by integrating the hanging tube with the arm, the earth tool can be Since the boom and arm can be linked together, the excavation depth can be increased by increasing the total length of the suspension tube below the tip of the arm (3) This makes it possible to obtain a large dump height at the same time.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the deep digging excavation device according to the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 11 denotes a hydraulic excavator main body, in which a boom 12 having a base end and a distal end is pivotally supported at the base end of the boom to the excavator main body 11 so as to be able to rise and fall within a vertical plane. A boom actuator 16 is provided between the boom 11 and the boom 120 to raise and lower the boom.

Reference numeral 14 denotes an arm, which is composed of a base 15 and a fork 16 as shown in FIGS. 2 and 6, and the base 15 is pivoted at its intermediate portion to the tip of the boom 12 in a vertical plane. An arm actuator 17 is provided between the boom 12 and the arm 14 to swing the arm.

Reference numeral 20 denotes a suspension cylinder, which is constructed by fitting two cylinders 26 and 27 into an outer cylinder 25 having an upper end, a middle part, and a lower end in order to be telescopically telescopic. In FIG. 2, 60 is a sheave attached to the outer cylinder 25 (4) at the proximal end of the adjacent cylinder 260, 31 is an intermediate support rope hung on the sheave 60, and -I71 of this intermediate support rope 61 is fixed to the base end of the innermost cylinder 270, and the other end is fixed to the tip of the outer cylinder 25.

32 is a sheave attached to the base end of the outer cylinder 25; 66 is a lifting rope hung on the no-pro 2; one end of this lifting rope 52 is attached to the base end of the cylinder 260 adjacent to the outer cylinder 25;
The other end is wrapped around a lifting device 64 mounted on the outer surface of the outer cylinder 25.

As shown in FIG.
A sheave mechanism 68 consisting of a pair of opposing fixed sheaves 66 and a movable sheave 67 that move toward or away from each other by the operation of a hydraulic cylinder 65 is provided on the outer surface of the The sheave mechanism 6
8 and an inner tube 26 adjacent to the outer tube 25, the rope connection length can be expanded or contracted. In addition to the above-mentioned method, there are various methods for expanding and contracting the suspension tube 20 to increase or decrease the suspension length of the innermost cylinder 27. For example, as shown in FIG. It is also possible to use the device 7.

At the lower end of the innermost cylinder +1l11 is a working earth tool.
That is, in this embodiment, a hydraulically actuated clamshell packet 40 is housed. The hydraulic hose 41 of the hydraulically operated clam/el packet 40 is wound up and unwound by a hose winding device 42 that follows the rise and fall of the packet 40.
is involved in.

In the embodiment shown in FIGS. 2 to 6, the cylinder 26.27
Although the example is shown in which two cylinders are provided, it is also possible to insert the cylinder directly into the entire outer cylinder of - cylinders, and it is also possible to have a plurality of three or more cylinders.

Reference numeral 18 denotes a short rectangular cylindrical frame, which is pivotally supported on the forked part of the arm 14 via pins 21 at both the left and right sides 9111, as shown in FIGS. The frame body 18 swings in the left-right direction via pins 19 (7) on both sides after =+T at the longitudinal intermediate portion of the outer cylinder 25 of the suspension cylinder 20, which is arranged to vertically penetrate inside the frame body 18. It supports freely. FIG. 4 shows a modification of the frame 18 described above, in which the frame 188 has a bifurcated shape and is rotatably supported by the arm 14a via a bearing 26. The longitudinally intermediate portion of the outer cylinder 25 of the suspension cylinder 20, which is disposed so as to pass vertically inside the forked part, is pivotally supported in the left and right sides via pins 21 so as to be swingable in the front and rear directions. be.

Note that the lower end of the arm 14.148 has a structure in which the frame body 1 is
A contact member 28 that can be brought into contact with the outer cylinder 25 is fixed at a position considerably lower than 8-E or the pivot center of the outer cylinder 25 in the front-rear direction.

Here, the considerably lower length means a length of 8 hairs to obtain the moment to swing the outer cylinder 25 around the swing center when the contact member 28 presses the outer cylinder 25. A limit switch 45 having an A contact point is provided between the abutting part 28 and the rear surface of the outer cylinder 25, and the lower end inner surface of the outer cylinder 25 and the outside of the T end of the inner cylinder 26 that contacts the outer cylinder 14. (8) A limit switch 46 having a B contact is provided between the surfaces, and an alarm circuit activated by these glue switches is provided. (b) When the lower end of the arm comes into contact with the rear surface of the outer cylinder due to the up and down movement of the boom 12 or the swinging of the arms 14, 148, the limit switch 45 is activated and the A contact is turned ON, causing an alarm. However, when the suspension tube 20 is shortened and the distance between the lower end of the outer tube 25 and the lower end of the adjacent inner tube 26 becomes within a certain value, the limit switch 46 is activated and the B Contact is OFF
F, and in that state, even if the lower end of the arm comes into contact with the rear surface of the outer cylinder, the alarm will not operate.

Next, the operation of the deep digging excavation device according to the present invention will be explained. When starting excavation, first
The working earth tool 40' attached to the tip of the inner cylinder 27 of the innermost part 9111 is raised high and floated above the ground surface, and is positioned above the mine entrance. Then boom 12 and arm 1
4 to directly lower the suspension tube 20 and stop it at an appropriate position, and then increase the suspension length of the lifting rope 66 of the lifting device 64 to extend the suspension tube 20 and move the earth tool 4 for work.
0 to reach the bottom of the hole.

When this hanging cylinder 20 is extended from the most shortened state, the innermost cylinder 27 is pulled downward by the weight of the earth tool, and the extended position of the cylinder 26 adjacent to the outer cylinder 25 is suspended by the sheave 60. Since the intermediate support lobes 61 are uniquely determined in accordance with the positions of the innermost inner tube 27 and outer tube 25, the suspension tube 20 is smoothly extended downward.

After completing the work using the working earth tool 40, the lifting device 5
4, the suspension tube 20 is shortened, and then the boom 12 and the arm 14.148 are interlocked to move the suspension tube to the upper row. When the state shown by the solid line in FIG. 5 is reached, the arm actuator 17 is activated. The arm 14, 148 is swung to bring the foil contact member 28 fixed to the lower end of the arm 14 into contact with the rear surface of the outer tube 25, and the arm is further tilted to connect the suspension tube 20 with the arm. The lower ends of the suspension tubes are swung together to raise them, and the working earth tools 40 are brought out onto the ground and raised to a state where rough dang work can be performed, that is, a state shown by the chain line in FIG. 5. Then, the excavator main body 1 is rotated to discharge the excavated earth and sand.

In addition, if the abutting part 28 of the arm comes into contact with the outer cylinder 25 during work while the hanging cylinder 20 is not shortened sufficiently, this prevents the bag from breaking due to the bending moment of the hanging cylinder. Therefore, the limit switch 46 provided between the lower end of the outer cylinder 25 and the lower end of the inner cylinder 26 adjacent thereto, and the limit switch 45 provided between the contact member 28 and the outer surface of the outer cylinder 25 The alarm is activated by the action, and the operator operates to separate the contact member 28 from the outer cylinder 25. However, when the suspension tube 20 is in the shortened state, the B contact of the limit switch 46 located between the lower end of the outer tube 25 and the lower end of the adjacent inner tube 26 is activated, so the contact member 28 comes into contact with the outer cylinder 25 and presses it, and the A contact of the limit switch 45 is activated, but the alarm is not activated and the suspended cylinder 2
0 is integrated with the arms 14 and 14a and oscillates to form the earthen tool 4.
0 can be lifted upwards and the dumping operation can be started.

The deep-digging excavation device according to the present invention has a suspension tube that extends and contracts in a telescopic manner and is vertically suspended from the middle part of the outer tube so as to be able to swing back and forth and left and right, so that the suspension tube can be extended. Since no strong bending moment is applied to the pipe and it can be extended upwards, the hanging tube can be made long, and when the hanging tube is at its shortest length, the hanging tube can swing together with the arm! Since it is possible to raise the earth tool by 1 fII, the earth tool can be raised by interlocking the boom and arm without having to raise the entire upper tool above the ground surface in advance, and the total length of the suspension tube can be increased by that much. There is the advantage that the excavation depth can be increased and, furthermore, the earth tool can be raised to the required dumping height.

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing an example of a conventional deep digging excavator, FIG. 2 is a partially sectional side view showing an embodiment of a deep digging excavator according to the present invention, and FIG. 6 is an arm of FIG. 2. FIG. 4 is a partially sectional side view showing an example of a modification of the arm and frame portion of FIG. 2; FIG. FIG. 11...Hydraulic excavator main body 12...Boom 16...Boom actuator 14.148
... Arm 17 ... Arm actuator 18.18a
... Frame 20 ... Suspension cylinder 25-°゛ Outer cylinder 26.27 ... Cylinder 28 Pa contact member 64 °°° Lifting device 68 ... Loop mechanism 40 ... Earth tool for work 45 ... Limit switch 46 ... Limit switch patent applicant Ryutabe Yoritomi

Claims (1)

[Claims] The boom has a base end and a front end, the base end is pivotally supported on the hydraulic excavator main body, and the boom is raised and lowered in a vertical plane by a boom actuator, and the arm actuator is pivotally supported on the front end of the boom. It has an arm that can be swung in a vertical plane by the arm, and has a suspension RTI in which one or more cylinders are telescopically inserted into the outer cylinder, and can be swung back and forth on both left and right sides. The arm is pivotally supported and the outer cylinder is pivotally supported on both front and rear sides so as to be swingable in the left and right directions, or the arm is rotatably supported and the outer cylinder is pivotably supported on both left and right sides so as to be swingable in the front and rear directions. It has a frame body, and is fixed to the lower end of the arm, and when the boom rises and falls and/or the Ail arm swings, the frame body or the outer cylinder is swung in the front-rear direction.
It has a contact member that can be brought into contact with the outer cylinder at a considerably lower position, and an earth tool is mounted on the lower end of the innermost cylinder of the hanging cylinder. Drilling equipment for deep digging.