JPS6315425Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mounting device for supporting and tilting a guide column for foundation work in an excavator used for drilling into the ground and driving piles.

As is well known, an excavator is equipped with an auger screw, a casing, and an auger machine for driving the rotation of the auger screw on the guide column, and as the auger screw rotates and descends along the guide column. A guide post is held in an upright position in order to drill an excavation hole perpendicular to the ground. However, when transporting this excavator to and from the required construction site, power lines, bridges, etc. often become obstacles to the guide supports that are held in an upright position, and moving in an upright position is dangerous. Therefore, during transportation, it is necessary to place the guide column on the crane body in a horizontal position. Therefore, conventionally, as described in Japanese Utility Model Application Publication No. 50-29011, for example, one point of the guide column is supported by a boom, and the guide column is tilted and displaced by extending and contracting two hydraulic cylinders. However, since the guide column cannot be placed on the crane body, a separate mounting platform is required, and a separate trailer must be prepared for transportation. Another example is to deflate the backstay supporting the guide column, then remove it and place the guide column on the crane body, but this is difficult and time consuming, and the The operating rate of construction work was significantly reduced.

The present invention was developed in view of this point, and allows the guide column to be easily tilted from an upright position to a horizontal position and placed on the crane body without removing the backstay, or to be placed on the crane body from a horizontal position to an upright position. The aim is to provide a mounting device which can be modified and which can significantly improve the efficiency of the work.

Hereinafter, one embodiment of the present invention will be explained based on the drawings. In Fig. 1 and Figs. 4 to 6, 1 is an excavator according to the present invention, 2 is a crane main body, 3 is a guide column, and 4 is a structure installed along it. The auger machine 5 is suspended via a sheep 7 by a rope 6 for lifting/lowering operation, and is slid on the guide rod 4 by a guide 8 fixed to the auger machine 5 to be raised and lowered. 9 is an auger screw rotated by an auger machine 5, 1
0 is the casing. On the other hand, a guide rail 11 made of two grooved steel sections facing inward at a constant interval is installed above the guide column 3 (see Figure 5), and a guide rail 11 is placed at a constant interval below the guide post 3 (see Figure 5). Another guide rail 12 made of two angle irons with one side facing each other is attached by welding or the like.
A stopper 13 is fixed to the lower end of the guide rail 11, as shown in FIG.
It protrudes in the same direction. During excavation work, this guide pin fits into a guide hole provided at the tip of the backstays 15, 15, which will be described later, to perform horizontal positioning. for fixing the part to the guide post 3,
In the embodiment, three guide pins are provided, but the number can be increased or decreased as appropriate. Further, below the lower end of the guide rail 11, an engaging hook 16 and a hydraulic cylinder 18 for rotating the hook are rotatably pivoted to a support bracket 17 fixed to the guide column 3 by welding or the like by pins 19 and 20, respectively. is,
Further, the hook 16 and the hydraulic cylinder 18 are connected to the pin 2.
1 is rotatably connected. As the hydraulic cylinder 18 is driven to expand and contract, the engagement hook 16 rotates and engages and disengages from engagement pins provided at the tips of the backstays 15, 15.
The backstays 15, 15 are constructed by coaxially connecting the bases of hydraulic cylinders 15a, 15a with relatively long strokes and hydraulic cylinders 15b, 15b with relatively short strokes, respectively, by bolts or the like via intermediate stays 15c, 15c. It is. This is a long stroke hydraulic cylinder 15
a, 15a extend and contract over its entire stroke, and a short stroke hydraulic cylinder 15b,
15b is extended and contracted to an intermediate stroke position as necessary for fine adjustment and to measure work efficiency. The lower ends of the backstays 15, 15 are pivotally connected to both wings of the crane main body, and the tip ends are respectively pivotally connected to a well-known universal joint 22 so that the pair of backstays 15, 15 can swing back and forth and left and right. . Furthermore, as shown in FIGS. 4 and 5, a long guide bracket 23 is fixed to the universal joint 22 in the same direction as the guide rail 11. Rollers 24a, 24b, 24c, 24
d is pivotally supported via the bearing part 25, and the bracket 2
The guide pins 14a, 1 are provided at both longitudinal ends of 3.
Guide holes 26a, 26 that fit into 4b, 14c
b and 26c, and the hook 1 is connected to the lower end of the bracket 23 via an auxiliary bracket 27.
An engaging pin 28 that engages with the guide rail 11 is provided in a protruding manner, and as the support bracket 23 supported by the backstays 15 moves in the direction of the arrow a shown in FIG. It comes into contact with the stopper 13, is connected to the guide column 3 so as to be latched thereto, and to be slidable along the guide rail 11 in the direction of arrow b.

Further, as shown in FIG. 1, especially FIG. 6, near the tip of the crane body 2, the base end of the mast 29 is located at a position spaced downward from the mast 29, and the base end of the mast tilting hydraulic cylinder 30 is located at a position spaced downward from the mast 29. are rotatably connected to each other, and their tips are connected in a substantially mountain shape by a pin 31, and the pin 31
A roller 32 is pivotally attached to the hydraulic cylinder 3.
0, the mast 29 is driven upward and upward from a substantially upright position to a substantially horizontal position toward the rear. However, when tilting the guide column 3 as described later, the roller 32 is attached to the second rail 12 are pre-arranged so that they are slidably abutted.

Furthermore, as shown in FIG. 1, especially FIG. 6, a hydraulic cylinder 33 serving as a support arm is rotatably attached to the tip of the crane body 2, and its piston rod 33a is connected via a support bracket 36. It is pivotally mounted below the guide rail 12 of the guide column 3. The support arm 33 has one end attached to another tilting hydraulic cylinder 3 which is pivotally connected to the crane body 2.
4 via a removable pin 35, and the support arm 33 is driven by the tilting hydraulic cylinder 34 from a substantially upright position forward to a substantially horizontal position. There is.

In the above embodiment, the guide rail 11 is made up of two groove-shaped steels, but it may also be made of one I-beam or H-beam, and the guide rollers can slide between the opposing surfaces. .

The present invention is constructed as described above, and first, during excavation work, the guide column 3 is supported in an upright position as shown in FIG. In this state, one of the hydraulic cylinders 15 of the backstays 15, 15
a, 15a are extended to their maximum stroke positions, and the other hydraulic cylinders 15b, 15b are extended to appropriate stroke positions. Also backstay 15,
Guide bracket 23 pivotally attached to the tip of 15
are in contact with the stopper 13, and the guide holes 26a, 2
6b, 26c are guide pins 14a, 14b, 14
c and is positioned in the horizontal direction, and the stroke of the hydraulic cylinder 18 for rotating the hook is extended to engage the engaging hook 16 and the engaging pin 28, thereby firmly engaging the guide column 3. It has been stopped.
Further, the supporting arm tilting hydraulic cylinder 34 is extended to the maximum stroke position, and the supporting arm hydraulic cylinder 33 is extended to the maximum stroke position.
is in a substantially upright position, and the hydraulic cylinder 33 is extended to an appropriate stroke position to adjust and support the vertical position of the guide column 3. Further, the mast tilting hydraulic cylinder 30 is retracted to the minimum stroke position, and the mast 29 is tilted onto the crane body 2 so as not to interfere with excavation work. Next, when the guide column is placed in a horizontal position on the crane body during transportation, as shown in FIG. Other hydraulic cylinder 1
5b and 15b are retracted to the minimum crane position.
Then, the mast tilting hydraulic cylinder 30 is extended to raise the mast 29, and the roller 32 at the tip of the mast 29 is brought into contact with the guide rail 12, so that the weight of the guide column 3 is supported by the mast 29. Thereafter, as shown by the two-dot chain line in FIG. 4, the hook rotation hydraulic cylinder 18 is contracted to the minimum stroke position to disengage the hook 16 and the engagement pin 28, and the guide column 3 and the backstays 15, 15 are disengaged. Release the lock status. Next, when the stroke of the mast tilting hydraulic cylinder 30 is gradually contracted, the mast 29 moves down and the roller 32 at the tip of the mast 29 comes into contact with the second rail 12, sliding and tilting the guide column 3. Become. At this time, the upper part of the guide column 3 moves upward and rearward of the crane body 2, and the center of gravity of the entire excavator moves backward, so the stroke of the support arm tilting hydraulic cylinder 34 is contracted to move the support arm hydraulic cylinder 33 forward. This moves the guide column 3 forward to maintain overall balance. At this time, it is safer if the lower end of the guide column 3 is always lightly touching the ground. Also backstay 15,
15 is movable up and down, no particular driving force is applied to it, and its tip slides along the guide rail 11, causing the backstays 15, 15 to move up and down backward. Furthermore, mast tilting hydraulic cylinder 3
When the guide column 3 is retracted to the minimum stroke position, the guide column 3 is placed on the crane body 2 in a substantially horizontal position (FIG. 3). Further, in order to bring the guide column 3 into an upright position from this state, the above-mentioned operation may be reversed.

As described above, according to the present invention, the guide column is pivotally supported at the lower part of the guide column via the support arm to the front part of the crane body, and is held in an upright position by the telescopic backstay attached to the crane body. In an excavator that is tilted upward, a guide rail of the required length is provided on the guide column in the longitudinal direction, while the backstay can be tilted upwards and downwards,
Since the guide roller of the vertically elongated guide bracket provided at the tip of the guide bracket is made to roll within the guide rail, the backstay that contracts when the guide column is changed from an upright position to a horizontal position is removed from the tip of the backstay. It becomes possible to tilt backwards by moving the guide column upward, and when converting the guide column from a horizontal position to an upright position, the backstay can be moved upward by moving its tip downwards on the guide rail. Therefore, when carrying the excavator into and out of the construction site, the guide support can be easily, quickly, and safely placed on the crane body in a horizontal position without removing the backstay. In addition, in the present invention, an engaging pin and an engaging hook for locking the backstay to the guide column at the lower rolling end of the guide roller are provided on the guide bracket and the guide column, respectively, so that the backstay can be guided. It is possible to automatically lock the guide column to the support column and, if necessary, release the lock and tilt the guide column to a desired angle. Moreover, in the present invention, the guide hole and the guide pin for pin-coupling the guide bracket to the guide column at the rolling end of the guide roller are provided in the guide bracket and the guide column, respectively, so that the locking by the engagement means can be prevented. Combined with this action, the backstay can be firmly fixed to the guide column in a fixed position.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Figure 1 is a side view of an excavator, Figures 2 and 3 are side views for explaining how the invention is used, and Figure 4 shows the main parts. 5 is a sectional view taken along the line AA in FIG. 4, and FIG. 6 is an enlarged side view of a portion of the excavator. 1... Excavator, 2... Crane body, 3... Guide column, 11... Guide rail, 14a, 14
b, 14c... Guide pin, 15... Back stay, 16... Engaging hook, 23... Guide bracket, 24a, 24b, 24c, 24d... Guide roller, 26a, 26b, 26c... Guide hole, 28... ...Engagement pin, 33...Support arm.

Claims (1)

[Scope of utility model registration request] A guide column for excavator work is pivoted to the front part of the crane body via a support arm at its lower part, and is held in an upright position and tilted backward by a telescoping backstay attached to the crane body. In the machine, a guide rail of a required length is disposed on the guide column in the longitudinal direction, while a back stay is movable rearward and upward, and a long guide bracket is provided vertically at the tip of the back stay, and the guide rail is attached to the guide bracket. An engagement pin and an engagement hook are provided on the guide bracket and the guide column, respectively, to pivotally support the guide roller rolling in the rail, and to lock the backstay to the guide column at the lower rolling end of the guide roller. A mounting device for a guide post for foundation work in an excavator, wherein the guide bracket and the guide post are provided with a guide hole and a guide pin for pin-coupling the guide bracket to the guide post at the terminal end, respectively.