JPS61106888A - Apparutus for mounting guide pillar for foundation construction in drilling machine - 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 mounting device for supporting and tilting a guide post 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. Ihl cut in Iike (
C5 1 & d nll + t is drilled vertically into the ground, so the guide support is held in an upright position. However, when transporting this hot cutting machine to and from the required construction site, power lines, I! Beams, etc. often become obstacles to guide columns held in an upright position, and moving them in an upright position is dangerous, so during transportation, guide columns should be tilted horizontally onto the crane body. It is necessary to place Furthermore, depending on the type of construction work, it is necessary to tilt the guide column from an upright position to a desired angle in order to cut diagonal holes into the ground at a required angle of inclination for driving anchors for retaining earth or diagonal piles.

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, in this case, the guide column cannot be placed on the crane body, so a separate mounting platform is required, and a separate trailer must be prepared for transportation. Shrink the backstay that supports the guide column z7:I
The conventional method for removing cranes is to place the guide column on the crane body, but this is difficult and takes a lot of time.

On the other hand, in a structure in which the guide column is supported at two points by the lower support arm and the middle upper back stay to stabilize the guide support during excavation work, even if both the support arm and the support stay can be moved up and down, the guide support Due to the relationship between the length of the column and the position of the fulcrum, it was not possible to safely and reliably tilt the column and place it in a well-balanced horizontal position on the crane body during transportation.

The present invention has been made in view of these conventional problems, and in a structure in which a guide column is supported at two points by a lower support arm and a middle upper backstay, there is no need to remove the backstay, earth auger, etc. You can easily move the center of gravity of the guide column from an upright position to a horizontal position while safely and securely tilting it to place it on the crane body in a well-balanced manner, or change from a horizontal position to an upright position, and during excavation work. It is an object of the present invention to provide a device of this type that can displace and hold the guide column at any desired angle, thereby significantly improving the efficiency of the operation.

That is, the gist of the present invention is that the first guide rail is located halfway above the guide column that holds the auger machine so that it can be raised and lowered.
In addition, second guide rails are attached to the lower middle of each of the pillars, and a backstay that is telescopically driven and movable up and down is pivoted approximately at the center of the crane body, and the tip of the backstay is controlled by a remote control. lockable by a locking means and slidably coupled along the first guide rail when the locking means is released, and at the front of the crane body;
A mast is pivotally attached to the front end of the crane body, and a support arm is pivotally attached to the front end of the crane body so as to be able to move upwardly and downwardly. is pivotally connected to the guide column below the second guide rail, and the other end of the tilting hydraulic cylinder for telescopic driving, whose one end is pivotally connected to the crane body, is detached from the base end of the support arm. The present invention relates to a mounting device for a guide post for foundation work in an excavator which is pivotally connected via a possible pin.

Hereinafter, one embodiment of the present invention will be explained based on the drawings. In Fig. 1 and Figs. 6 to 8, l is an excavator according to the present invention, 2 is a crane main body, and 3 is a guide column. , 4 are guide rods provided along the auger machine 5. The auger machine 5 is suspended via a knob 7 by a rope 6 for lifting/lowering operation, and is slid on the guide rod 4 by a guide element 8 fixed to the auger machine 5 to be raised and lowered. 9 is an auger screw rotated by the auger machine 5, and lO is a casing. On the other hand, a first rail 11 made of two groove shaped steels facing inward at a constant interval is placed above the guide column 3 (see Fig. 7), and a first rail 11 is placed at a constant interval below the guide post 3 (see Fig. 7). A second rail 12 made of two angle irons with one side facing each other is attached by welding or the like. As shown in FIG. 6, a stopper 13 is fixed to the lower end of the first rail 11, and a guide pin 14a with a tapered tip is provided at the lower end and on both wings slightly above it.

14b and 14G are provided to protrude in the same direction as the first rail 11. During excavation work, this guide pin fits into a guide hole provided at the tip of a hack stay 15. 15.15 This is for fixing the tip to the guide column 3, and in the embodiment Jll! guide pins are provided, but the number can be increased or decreased as appropriate.

Further, below the lower end of the first rail 11, a remotely controllable locking means 17 is provided (see FIG. 6). A hook 16 and a hook rotation hydraulic cylinder 19 are rotatably connected to the fixed placket 1B by pins 20 and 21, respectively, and the hook 16 and the hydraulic cylinder 19 are rotatably connected by a pin 19a. There is.

As a result, as the hydraulic cylinder 19 is driven by III, the flap 16
is configured to rotate and engage and disengage from an engagement via 28 provided at the tip of the backstay 15°15.

The backstay 15.15 has relatively long stroke hydraulic cylinders 15a, 15a, relatively long stroke iN
,5,m,E'i'j 7#'15b,
tsbo+i+hxas+intermediate stays 15c and 15c are connected coaxially by bolts or the like. The dirt is from the long stroke hydraulic cylinders 5a and 1.
The hydraulic cylinder 5a is extended and contracted over its entire stroke, and the hydraulic cylinders 5b and 15b, which have short strokes, are extended and contracted to an intermediate stroke position as necessary for fine adjustment and are used to improve production efficiency. The backstay 15゜1
The lower end of the crane body 2 is pivotally connected to both wings of the crane body 2, and the tip thereof is pivotally connected to a well-known universal joint 22 so that a pair of backstays 15, 15 can swing back and forth and left and right. Furthermore, a long support bracket 23 is fixed to the universal joint 22 in the same direction as the first rail 11, as shown in FIGS. rollers 24a, 24b, 2 that slide on
4c and 24d are pivotally supported via a bearing portion 25, and the guide pins 14a,
Guide holes 26a that fit into 14b' and 14c
. Each time the supported support bracket 23 moves in the direction of +;

The lower end of the first rail 11 abuts against the stopper 13 and is latched to the guide column 3, and the first rail 1
1 in a slidable manner in the direction of the arrow.

Further, as shown in FIG. 1, especially FIG. 8, near the tip of the crane body 2, the base end of the mast 29 is also located near the tip of the mast 2.
7-stroke tilting hydraulic cylinder 3 at a distance 1 below 9
The proximal ends of the cough pins 30 are rotatably pivoted, and the distal ends of the cough pins 31 are connected in a substantially mountain shape, and a roller 32 is pivotally attached to the cough pin 31. The mast 29 is driven upward and upward (+'J! movement) from a substantially upright position toward the rear to a substantially horizontal position. However, when tilting the guide column 3 as described later, a roller is attached to the second rail 12. 32 are pre-positioned in slidable abutment.

Furthermore, as shown in FIG. 1, especially FIG. 8, a hydraulic cylinder 33 serving as a support arm is rotatably attached to the tip of the crane body 2, and its piston rod 33;
1 is pivotally mounted below the second rail 12 of the C guide column 3 via the support bracket 3.

One end of the support arm 33 is connected to the other end of another tilting hydraulic cylinder 34 pivotally connected to the crane body 2, that is, the piston rod 34a, via a removable pin 35. By the tilting hydraulic cylinder 34, the support fi+33 is tilted (rotated) from a substantially upright position toward the front to a substantially horizontal position. In addition,
Reference numeral 37 denotes a roller that is supported by the support arm 3 in a protruding manner on the guide column 3.
3, and prevents the lower part of the guide column 3 from moving excessively to the right, and also serves as a guide when the guide column moves up and down due to the expansion and contraction movement of the support arm 33. .

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 condition, the backstay 15.15
One of the hydraulic cylinders 15a, 15a is extended to the maximum stroke position, and the other hydraulic cylinder 15b, 15b is extended to an appropriate stroke position. Thus, the tip of the backstay 15.15 is in the first position of the first gail 11, that is, the lower end of the bearing portion 25 comes into contact with the stopper 13, and the guide hole 26a.

Guide pin 14 a + 14 b + on 26b, 2ec
14c is inserted, the flange 16 of the locking means 17 engages with the engagement pin 28, thereby being locked to the guide column 3. In addition, the support arm tilting hydraulic cylinder 34 extends to the maximum stroke position to bring the support arm hydraulic cylinder 33 into an approximately upright position, and the hydraulic cylinder 33 extends to an appropriate stroke position to adjust the vertical position of the guide column 3 and support it. are doing. In addition, the mast 191 and the hydraulic nolinder 30 are retracted to the minimum stroke position, and the mast 29 is tilted over the crane body 2 so as not to become an obstacle to the excavation work. Therefore, as mentioned above, when excavating into the ground at the required angle of inclination, the hydraulic cylinder 1 of the backstay 15.
By expanding and contracting the strokes of 5b and 15b to tilt the guide column 3, and by slightly contracting the stroke of the support arm tilting hydraulic cylinder 34, the support arm 33 is moved forward.
IJ1 upset, plan” ni+, 30) T!91
H#7"!@(b Lt"i'1il(.yo.

Can be moved. In addition, the support arm 33 is
By adjusting it to the desired position, the first end of the guide column 3 can be moved up and down to an appropriate position, and by combining these operations, the guide column 3 can be displaced and held in any desired state. be able to.

Next, when the guide column is placed in a horizontal position on the crane body during transportation, the pin 35 pivotally connects the base end of the support arm 33 and the piston rod 34a of the tilting hydraulic cylinder 34. By removing the support l'1i
After making the i33 vertically movable, as shown in Figure 2,
one hydraulic cylinder 15a of the backstay 15.15;
15a is retracted to the minimum stroke position, and then the other hydraulic cylinders 15b and 15b are similarly retracted to the minimum stroke position, and at the same time, the support arm 33 itself is also retracted to the minimum stroke position. By this operation, the guide column 3 is tilted to a predetermined angle with the roller 37 in contact with the side surface of the support arm 33.

In addition, if the transportation distance is short and there is no need to keep the guide post 3 in a horizontal state, or if the guide post 3 is temporarily tilted for work reasons, it should be prepared for the next excavation work and the guide post 3 should be placed in a horizontal position.
'35 without pulling out and grinding (hydraulic fringe 15 on the side)
The stroke position can be maintained in an adjusted state without contracting b and 15b.

Next, as shown in FIG. 3, the 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 second rail 12 until the cylinder 3o leaks. The weight of the guide column 3, which was supported by the .15, is instead supported by this mast 29. Thereafter, as shown by the two-dot chain line in FIG. 6, the hook rotation hydraulic cylinder 19 is contracted to the minimum stroke position to release the engagement between the hook 16 of the locking means 17 and the engagement pin 28. By the operation, the locking (locked state) between the guide column 3 and the backstays 15, 15 is released, and the tip of the backstay 15.15 is in the first position.
Since it can slide along the guide rail 11, it can freely move up and down depending on the degree of inclination of the guide column 3.

Next, by gradually contracting the stroke of the mast closing cylinder 30 and tilting the mast 29 backward, the guide column 3 is slowly tilted, and in parallel with this tilting, the auger machine 5 is gradually lowered, and the third The state shown in the figure is changed to the state shown in FIG. 4, and finally the guide column 3 is brought into a horizontal state as shown in FIG. Thereafter, the guide column 3 is moved back and forth by the expansion and contraction of the support arm 33, and the balance is adjusted so that the center of gravity of the entire guide column 3 and auger machine 5 is located on the crane body 2, and the transportation position is set. During this adjustment, the guide post 3 moves over the rollers 32 of the mast 29.

In addition, when pulling out the pin 35 in the above-mentioned operation, in order to better maintain the stability of the guide column 3, it is desirable that the lower end of the guide column 3 is in contact with the ground. An auxiliary holding means such as suspending the guide column 3 by another crane (not shown) may be employed until the guide column 3 is slightly tilted.

On the other hand, in order to change the guide column 3 from the above-mentioned horizontal state to an upright position, the above-described operation may be reversed.

The guide column mounting device according to the present invention as described above is particularly suitable for relatively short guide columns with a total length of about 72 m or less.
I'+I! i Second! 1, but it can also be applied to longer guide columns if there is no problem during transportation. In addition, in the present invention, the detailed structure of each component can be modified in various ways other than the above-described embodiments. For example, as a driving means for the backstay, mast, hook of the locking means, etc., in addition to the hydraulic cylinder, a hydraulic cylinder, a pneumatic cylinder, etc. can be used. It is also possible to use a hydraulic motor, pneumatic motor, electric motor, etc. by using an appropriate transmission mechanism.

As described above, according to the present invention, the backstay, support arm, mast, and locking means can be controlled remotely from the operator's seat of the crane body without removing the backstay or any working equipment such as the earth auger. By driving, the guide column can be easily and safely converted from an upright position to a horizontal position and vice versa in a short period of time, and the switching between the transportation state and the working state can be performed smoothly, significantly increasing work efficiency;・1′! ″”′″″ability-c″′a゛u°z<-y7X
(7), A° transport state 2 can be realized.

In addition, as in the above-mentioned embodiment, the backstay 15.15 includes the 7-liner of the book. I, 2, L4 291, it becomes easier to change the posture of the guide column, and
It has the advantage of being able to perform IIJ oblique angle Kaita Kiyoshi. Furthermore, by constructing the support arm that supports the guide column with a hydraulic fringo that is driven to expand and contract, it becomes easier to displace and maintain the guide column in a desired state during excavation work.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of an excavator, Figs. 2 to 5 are side views for explaining the usage state of the invention, and Fig. 6 is a backstay tip. cross-sectional view of the section,
FIG. 7 is a sectional view taken along the line AA in FIG. 6, and FIG. 8 is an enlarged side view of the main parts of the excavator. l... Excavator, 2... Crane body, 3... Guide support, 11... First rail, 12... Second rail, 15... Punk stay, 17... Locking means, 2
9...Mast, 30...Hydraulic cylinder for mast tilting, 33...Support arm, 35...Removable pin. Figure 1 Figure 2 Figure 6 Figure 7

Claims (1)

[Claims] 1. A first guide rail is attached to the upper part of the guide column that holds the auger machine so that it can be raised and lowered, and a second guide rail is attached to the lower part of the guide column, and the crane body A backstay that is telescopically driven and movable up and down is pivoted approximately at the center of the backstay. A mast is pivotally connected to the front part of the crane body and is slidably connected along the guide rail, and whose tip part can be slidably abutted to the second guide rail and is driven to move upward and downward. A support arm is pivotally attached to the part so as to be able to move up and down, the distal end of the support arm is pivoted to the guide column below the second guide rail, and one end is pivoted to the crane body for telescopic driving. A mounting device for a guide column for foundation work in an excavator, in which the other end of a tilting hydraulic cylinder is pivotally attached to the base end of a support arm via a removable pin. 2. The mounting device for a guide column for foundation work in an excavator according to claim 1, wherein the backstay includes two hydraulic cylinders with different strokes connected coaxially. 3. The mounting device for a guide column for foundation work in an excavator according to claim 1 or 2, wherein the support arm is a hydraulic cylinder that is driven to expand and contract.