JPS62228592A - Front frame device for earth drill - 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 (Field of Industrial Application) The present invention relates to a front frame device for supporting a Kelly drive device in an earth drill.

(Prior Art) In a conventional earth drill, a Kelly drive device δ is attached to the tip of the front frame. The Kelly drive device performs excavation by rotating the Kelly bar while being supported by wire lobes hanging from the boom, thereby rotating the packet attached to the lower end of the Kelly bar. The Kelly drive device is pushed through the Kelly bar and the weight of the packet, Kelly bar and Kelly driver device is 1-
It is not possible to excavate in one go with the reaction force of There were some problems. Further, there was a problem in that the 1L sand that landed on the hoisting rope for suspending the Kerryba was scattered around and deposited on workers, passersby, and even the earth drill 2. In addition, there was a problem that the upper end of the kelly bar was easily bent during excavation, and the excavation accuracy was poor.

In addition, as shown in FIG. 12, when the earth drill 2 is installed on sloping ground and the earth drill 2 is to be used for work, it is suspended from the top of the boom 3 and attached to the tip of the front frame 4. Since the Kelly 7 inserted into the Kelly drive device 5 is also inclined, when excavating by rotating the packet 7 attached to the lower end of the Kelly bar 6 by the Kelly drive device 5 via the Kelly bar 6, the inclined 68 will be drilled, so in order to drill a vertical hole, first move the ground it where the earth drill 2 is located to the two-dot chain line 9.
As shown in the figure, excavation must be carried out horizontally, iron plates must be laid down, and work must be carried out only after confirming that the main body of the earth drill 2 (lower traveling body 10 and 11 part revolving body 11) is water 11. There was a problem in that it took a long time to set up the system until it started.

(Problem to be solved by the invention) The invention was made in view of the above-mentioned problems.In addition to the weight of the bucket lift, Kelly bar, and Kelly lift device, the invention was made in view of the above problems. It is an object of the present invention to provide a front frame device for an earth drill that can support heavy loads, prevent sand flying, and further improve excavation accuracy. The object of the present invention is to provide a claw t (flow) frame device configured to allow digging regardless of the slope of the ground.

(Means for Solving the Problems) The front frame device of the present invention is based on Earthtrill's L8
1 (/U Attach the front frame to the rotating body so that it can rise and fall freely,
A Kelly drive device is attached to the tip of the front frame, and between the Kelly drive device and the upper part of the boom, there is provided a girder pipe having a length A that supports the Kelly drive device and the front frame.1. The feature is that the Kelly bar is slidably inserted into the core guide pipe, and the excavation reaction force applied to the Kelly drive device via the Kelly bar is transmitted to the boom via the guide pipe, causing the bucket to float. 2 is defense I] 2. Also,
The wire rope that lowers the Kerryba to the IR vibrates, causing
Even if dirt or sand falls off the ground, the guide vibe will prevent it from scattering.

Further, the present invention further provides a front frame having a Kelly drive device attached to the tip thereof, and a Kelly drive device tilting to the tip of the front frame having a Kelly drive device attached to the tip thereof. 4 yen for having a mechanism.
Regardless of the inclination of the drill body, the Kelly drive device can be held on the jaw surface, and the Kelly bar can also be held in a perpendicular position.
Jl in advance! ! DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Direct drilling is possible without the need for underwater excavation of the board. (Embodiments) The details of the present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment of the present invention, and 10 is a dome running body;
Reference numeral 11 indicates an upper revolving structure, and 12 and 13 indicate booms 3. A boom hoisting winch 14 is installed on the upper revolving body 11 and raises and lowers the boom 3 via a hoisting rope 15 and a pendant rope 16, and 17 is a bin capable of raising and lowering the front frame 4;
The winding installed in i+'i is taken up by the second winch, 18 is the chain winding, and is unwound by the second winch 17.
A hoisting rope connected to the Kelly halo via the sheaves 20 and 21 of the top bracket 19 of the page section, 22 is a length that connects between the rear bracket 24 of the boom 3 and the A frame 23 to support the boom 3 rearward. It is a support rod with adjustment I''1.

25 is a guide pipe provided according to the present invention, and as shown in FIGS. 1 and 2, the guide pipe 25 is
Consisting of a long inner pipe 25A and a short outer pipe 25B movably fitted to the lower part of the inner pipe 25A, the inner pipe 2
5A has a metal fitting 26 fixed to the top thereof, and is connected to a bracket 27 hanging from the top bracket 19 by means of a pin 28, so that it can be attached to the boom 3 from side to side as shown by arrow a. f. Connect freely.

The outer vibrator 25B is attached by fixing the two flange 29 provided at its lower end to the top of the frame 5a of the Kelly 1 live device 5 with bolts 30 (=J only).

Reference numeral 31 denotes a hydraulic telescopic cylinder that extends and retracts the guide vibe 25. As shown in FIG. Attachment is achieved by connecting the piston rond to a bracket 32 provided on the inner vibrator 25A with a pin 33, and connecting the piston rond with a bracket 35 provided on the side surface of the inner vibe 25A with a pin 36. 37 is inner vibe 2
This is a deflection meter attached to 5A.

+ij Kikaite pipe 252 the winding robe 18
The Kerry bar 6 suspended by is slidably inserted. 4 and 5 are views of the structure of the top of the kelly/haul 6, in which the hoisting lobe 18 is connected to the kelly halo via a swivel joint 37, and the swivel
On the rotated side ring 38 of the bell joint 37, there are several kite rollers 39 for smoothing the downward movement of the Kelly bar 6 with respect to the guide pipe 25. When the kelly bar 6 is a multi-stage kelly bar, the inner kelly bar is connected to the hoisting lobe 18 via a swivel joint, and the upper end of the outer kelly bar is provided with a swivel joy 71-- similar to that shown in the figure.
37 and guide roller 39 will be attached.

The frame 5a of the Kelly drive device 5 is attached to the fork portion at the tip of the front frame 4 by connecting it with a pin 40. The frame 5 a is fixed to the front frame 4 by inserting a pin 42 into one of the plurality of bottle holes 41 so that the relative inclination angle of the device 5 can be adjusted.
It has 6 structures.

Reference numeral 43 denotes a hydraulic cylinder for raising and lowering the front frame 4. The hydraulic cylinder 43 has its front end connected to the boom 3 with a pin 44, and a sheave block 45 is attached to the tip of the piston rod.

An undulating rope 47 is wound around a sheave block 46 attached to the boom 3, and its terminal end is connected to the tip of the front frame 4.

In this way, the guide vibe 25 is lowered from the top of the boom 3, one end of the guide vibe 25 is connected to the frame 5a of the Kelly drive device jη5, and the guide pipe 25
If the Kelly/Head 6 is slidably inserted therein, the excavation reaction force exerted on the Kelly drive device 54 will be transmitted to the boom 3 via the Guide Vibe 25 via the Kelly/Head 6. Therefore.

The lifting of the bucket lift 7 during excavation as in the conventional case is prevented, and excavation can be carried out efficiently and efficiently. In addition, even if the winding lobe 18 that lowers the Kelly bar 6 vibrates and the attached earth and sand comes off, the kite pipe 25 prevents it from scattering and prevents it from getting on the earth drill 2 or the worker. is prevented. In addition, since the Kerry bar 6 is housed in the guide vibe 25 and rotates, the upper end of the Kerry bar 6 is prevented from being cut (IL), and hole preparation can be performed directly! Highly accurate hole drilling is possible. I can do it.

In addition, the guide vibe 25 is configured to be extendable and retractable by the hydraulic cylinder 31, so when changing the excavation position from the position of the bucket lift 7 shown by the solid line to the position shown by 7', the kelly/toe 6 is held vertically. To do this, it is necessary to extend the hydraulic cylinder 43 to move the front frame A4 in the direction of incline, and also to operate the hoisting winch 14 in the direction of feeding out the lobe 15 to move the boom 3 slightly in the direction of incline. At this time, the top of the boom 3 is lowered by Hl, but the Kelly drive device 5 cannot maintain the vertical position of the Kelly bar 60 unless it is lowered significantly as shown in (G). The excavation position jn can be changed by confirming the verticality.

FIG. 6 shows another embodiment of the present invention in which, in addition to the guide pipe 25, a mechanism 48 for moving the Kelly drive device 5 to the tip and a mechanism 49 for tilting the Kelly drive device 5 to the tip are provided. In this configuration, the front frame 4 has a root portion 4A attached by a pin 13.
, an intermediate portion 4B provided to the base portion 4A via a tilting mechanism 49, and a tip portion 4C provided to the intermediate portion via a left-right moving mechanism 48, to which the Kelly drive device 5 is attached by pins 42, 40. It consists of

As shown in FIG. 7, the left-right movement a-lateral 48 is carried out along a guide rail 50 having a U-shaped cross section with a sunken i so as to face the -L portion of the intermediate portion 4B of the front frame 1.4. The collar portion 51 provided at the front and rear of the lower end of the portion 4C is slidably fitted, and the head side end of the tip moving hydraulic cylinder 52 is connected to the bracket 53 provided at the end of the tip portion 4C by a pin 54. Place the piston rod on the guide rail 5
0 by a pin 55, and is configured such that the tip portion 4C1, that is, the Kelly drive device 5, moves to the left I-1 with respect to the intermediate portion 4B by expansion and contraction of the hydraulic cylinder 52.

Further, the tilting mechanism 49 is as shown in FIG.

Pinch the center of the disk 56 fixed to one end surface of the root portion 4A and the disk 57 fixed to the lower end surface of the intermediate portion 4B.
58, the intermediate portion is connected so that it can tilt left and right about the pin 58. This tilting mechanism 49 does not use a pin 58, but rather allows one disk to slide freely into a U-shaped groove provided around the other disk, thereby making it possible to rotate both disks relative to each other. good.

If such mechanisms 48 and 49 are provided, even if the earth drill 2 is installed on the sloping ground 1 as shown in FIG. Front frame 4
Tip part 4 Cwo, tilt A4 II! ! i 1 in the downward direction, and as a result, as shown in FIG. The guide vibe 25 moves around the connecting bin 28 at the top of the boom 3, and at the same time the Kelly bar 6 inserted into the guide vibe 25 also makes the same movement, so that the Kelly drive device 5 and Kelly bar 6 are vertically moved. In the tilting mechanism 49, the intermediate portion 4B is forcibly tilted about the pin 58 with respect to the root portion 4A,
As shown in FIG.
can be placed in a vertical position, thus allowing a vertical sixty-eight to be excavated, as shown in FIG.

Also,? Even if the ground 1 is inclined in the front-back direction as shown in Figure 4''IJ11, Kelly Haro can be held in an easterly position by front flatting.In this case, the guide vibe 25 is.

By raising and lowering the front plate 4 and the boot 3 while extending or short-circuiting the hydraulic cylinder 31, the length of the guide pa/r-b 25 can be adjusted, and the guide pa/r-b 25 fulfills the role of receiving reaction force [1]. I can do it.

(Effect of 1991) As described above, in the present invention, a length-adjustable guide vibe is hung from the upper part of the boom which is attached to the upper revolving body of the earth drill so as to be able to rise and fall freely, and the kite Since the lower end of the vibrator is connected to the Kelly drive device and the Kelly bar is slidably inserted into the guide pipe, the excavation reaction force applied to the Kelly drive device is transmitted to the boom via the guide vibe. This prevents the packet from floating or falling apart during excavation as in the conventional case, and enables efficient excavation. In addition, even if the hoisting rope downstream of Kerryba vibrates and soil (-1./7) falls off, the kite vibrator prevents it from scattering, preventing it from hitting the earth drill or workers. In addition, the force-guided vibrator protects the north end of the kelly bar from soil flaring, allowing for highly accurate vertical drilling.Furthermore, the guide vibrator is configured to extend and retract. , changes in the working radius can be dealt with by expanding and contracting the guide vibe, and the above-mentioned effect can be achieved at any working radius.

In addition, in the present invention, the front frame is provided with a mechanism for moving the Kelly Drive awn m to the tip and a mechanism for tilting the Kelly Drive awn to the tip. Even if the earth drill main body is tilted, the Kelly drive device and Kelly bar can be held vertically, making it easy to dig straight down. Therefore, when drilling a hole,
! The labor and time for excavating i4, T7J into water qz can be omitted.

Figure 1 nj cylinder? Figure 1 is a side view of an earth drill showing an embodiment of the front frame device according to the present invention, and Figure 2 is a rear view of the kite pipes shown in Figure 1. , Figure 3 is a front view showing the guide pipe expansion and contraction device in Figure 1, and broom 4.
5 is a cross-sectional view showing the connection between the kelly bar and the winding rope, FIG. 5 is a cross-sectional view taken along line 17 in FIG. 4, and FIG. Figure 7 (A) is a rear view showing an example of the right and left movement mechanism of the Kelly drive device in unfired 1st 1, Figure 7 (B) is a side sectional view of (A),
FIG. 8(A) is a side sectional view showing an example of the tilting mechanism of the uninvented Kelly drive device, FIG. 8(B) is a rear view thereof, and FIG.
10 is a front view showing the excavation posture of the tip in sloping ground according to the embodiment; FIG.
12 is a side view showing the excavation posture of the embodiment on sloped ground in the longitudinal direction, and FIG. 12 is a front view showing problems with the conventional earth drill.

Patent applicant: EI Q Construction Machinery Co., Ltd. and one other attorney Patent attorney: Masami Akimoto and one other person Figure 9

Claims (1)

[Claims] 1. A front frame is attached to the upper revolving body of the earth drill so as to be able to rise and fall freely, a Kelly drive device is attached to the tip of the front frame, and the Kelly drive device is installed between the Kelly drive device and the upper part of the boom. A front frame device for an earth drill, characterized in that a length-adjustable guide pipe supporting a drive device and a front frame is provided, and a Kerry bar is slidably inserted into the guide pipe. 2. Attach a front frame to the upper revolving body of the earth drill so that it can rise and fall freely, attach a Kelly drive device to the tip of the front frame, and install the Kelly drive device and front frame between the Kelly drive device and the top of the boom. A supporting guide pipe whose length can be adjusted is provided, a Kelly bar is slidably inserted into the guide pipe, and a front frame with a Kelly drive device attached to the tip thereof has a mechanism for moving the Kelly drive device in the left and right direction. , a front frame device for an earth drill, characterized by being provided with a mechanism for tilting the Kelly drive device in the left and right directions.