JPS6363887A - Revolution drive for auger - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] (13. Field of Application in the Mainland) The present invention is applicable to fluid pipes such as gas pipes and water pipes buried underground, power lines, optical and electric signal lines, power lines, etc. This invention relates to a rotary chuck device that is attached to a rotary drive device that rotates an auger and grips the auger in a horizontal hole excavation device that excavates a relatively small-diameter horizontal hole, such as a horizontal hole for constructing a pipe or a horizontal hole for discharging water.

(Prior Art) The present inventors have developed a horizontal hole excavation system that allows the above-mentioned horizontal hole for underground pipes to be excavated without excavating a trench in a road or the like. An example thereof will be explained with reference to FIGS. 7 and 58.

Reference numeral 1 denotes a casing whose lower part is inserted into a vertical hole B, and an elevating frame 2 is mounted along left and right guide rails 5 provided in the casing 1 via rollers 6 so as to be freely movable up and down. The elevating frame 2 consists of a portal frame 3 and a guide frame 4 attached to the left and right pillars of the portal frame 3 by connecting the opposite sides to the bins 18a and 18b, respectively. 4, the inclination angle can be adjusted using a turnbuckle (not shown) for adjusting the inclination angle.

A pair of guide rails to and to are fixed to the guide frame 4 in its longitudinal direction, and an auger rotation drive device 7
By fitting the grooves provided on the outer layer of the guide rollers 11 attached to the four corners of the lower surface of the auger into the guide rail 10, the auger rotation drive device z7 can be positioned and moved by the guide rail lO. ing.

A traversing hydraulic motor 12 for traversing the auger rotation drive device 7 is installed on the guide frame 4, and a tin locator 13 rotated by the hydraulic motor 12 and near both ends of the guide frame 4 are installed. By connecting the chain 17 that is hung on the sprockets 15 and 16 attached to the guide rail to the connection part 19 provided on the side of the auger rotation drive device 7 and operating the hydraulic motor 12, the auger rotation drive device 7 is connected to the guide rail. 10.

The auger rotation drive device 7 includes an auger rotation hydraulic motor 7a.
and a rotary chuck device 7b, and a built-in mechanism for operating the rotary chuck device 7b.

A fixed charging device i14 for replenishing the auger is attached to the front end of the guide frame 4.

The fixed chuck device 14 includes a pair of left and right hydraulic cylinders 30.3 pinned to the guide frame 4 in the front and back direction.
1, claws 26 and 27 that are movably attached to the direction perpendicular to the axial direction of the auger 25 so as to be able to grip and release the grip portion 25a of the auger 25, and the hydraulic cylinder 30. 31 piston loft movement with claw 26.
27, and by extending and contracting hydraulic cylinders 30 and 31, the grip portion 25a can be gripped and released.

As for the elevating device for the elevating frame 2, an elevating motor mounted on the elevating frame 2 or a hydraulic cylinder may also be used, but in this example, as shown in FIG. 7, a winch 34 is used.
That is, 33 is a ring-shaped stand installed on the casing l, and on the stand 33 there are installed a winch 34 for raising and lowering the elevating frame 2 via the wire lobe 20, an operation panel 23, and the traversing hydraulic motor 12. It is equipped with an operating lever 24, a hydraulic bag 228 such as a valve, and a GG control panel 29. Also,
The frame 33 has a guide rail 5A continuous to the guide rail 5.

For example, when excavating a side hole for arranging a branch pipe to an existing buried pipe A, this coring can be used in the following manner. With the elevating frame 2 raised to the top and the rotary drive device 7 in the retracted position, the most advanced auger 25 (having a sharp tip at the tip and removably screwed together) is attached to the rotary chuck device. 7b, the winch 34 is operated in the lowering direction, and the locking piece (not shown) attached to the portal frame 3 comes into contact with the stopper (not shown) attached to the lower part of the guide rail 5 and is locked. The elevator frame 2 is lowered until it is lowered.

Next, the hydraulic motor 12 is operated so that the rotary drive device 7 moves forward, and the hydraulic motor 7a of the rotary drive device 7 is operated.
is operated in the excavation direction (clockwise rotation) to excavate a horizontal hole. In this case, the excavated earth and sand is discharged into the vertical hole B. After advancing the rotary drive device 7 to the frontmost position, the auger 25 is removed from the rotary char 2 removing device 7b, the hydraulic motor 12 is reversed, the rotary drive device 7 is moved backward, and the lifting frame 2 is moved to the winch 3.
4. And the second auger 25 on the ground
is attached to the rotary chuck device 7b, the lifting frame 2 is lowered, and the grip portion 25a of the leading auger 25 is attached to the fixed chuck device 1.
4, move the rotary drive device 7 forward,
By operating in the digging direction (clockwise rotation), the male threaded portion at the tip of the trailing auger 25 is screwed into the female threaded portion at the tail end of the auger 25. Then, excavation is performed in the same manner as above.

In this case, if the elevating frame 2 is provided with a storage device and a supplementing device for the auger 25, the auger can be added to the elevating frame 2 and excavation can be performed while the elevating frame 2 is installed underground.

This kind of action is reversed and a horizontal hole is excavated.

Moreover, when pulling out the auger 25, by connecting the newly installed pipe to the auger 25 at the tip and pulling it out, the newly installed pipe connected to the existing pipe A can be inserted into the side hole. In addition, 32 is
This is a large inlet auger guide for preventing collapse, which is attached to the opening 9 of the casing l.

A conventional rotary drive device 7 installed in this horizontal hole drilling system was constructed as shown in FIG. 9. Reference numeral 35 denotes a truck to which the guide roller 11 is attached, and a case 36 of a rotary chuck device m7b is bolted to the truck 35. The hydraulic motor 7a is mounted on the case 36 by bolting a frame 37, and the auger rotation hydraulic motor 7 is mounted on the frame 37.
a is fixed with port 38. A cylindrical body 39 whose rear end flange 39a is removably fixed to the case 37 with bolts (not shown) is concentrically inserted into the case 37, and the flange 39a of the cylindrical body 39 is Attach a cylindrical end member 41 with bolts 40, and fit a cylinder 43 into the end member 41 rotatably via an oil supply passage forming cylinder 42 and via an appropriate seal 44, A piston rod 4 is attached to the inserted chuck claw opening/closing cylinder 43 and the piston 45 slidably housed in the cylinder 43.
A cylindrical body 48 is connected to the front end of the cylinder 43, and is rotatably fitted into the cylindrical body 39 via a bearing 47, and has a piston rod 46 slidably fitted therein. Screwing (49) L, a set screw 50 is attached to the screwing part 49, a disc part 51 and a large diameter cylindrical part 52 are integrally provided at the 1111 end of the cylindrical body 48, and the large diameter The cylindrical part 52 is fitted into the front part of the case 36 via a ring-shaped bearing member 64,
A receiving gear 54 that meshes with the output gear 53 of the motor 7a is fixed to the disc part 51 by a port 55, and a circular block in which three enlarged bottom grooves 56 are radially formed on the front surface of the large diameter cylindrical part 52. 57 is fixed by a port 62, a sliding blow 2 63 is slidably fitted into each enlarged bottom groove 56, a chuck claw 58 is attached to each sliding block 63 by a port 59, and a chuck claw 58 is attached to each sliding block 63 by a port 59. connects the truncated conical block 60, slidably fits the block 60 into the large-diameter cylindrical portion 52, and inserts the sliding block 63 into the slanted wide-bottomed groove 61 formed around the block 60. The inner diameter side retaining portion 63a is slidably fitted. Therefore,
When hydraulic oil is supplied into the cylinder 43 so that the piston 45 moves to the right, the sliding block 63 moves toward the center of rotation and the chuck claw 58 closes the grip portion 25 of the auger 25.
It has a structure that allows it to hold a.

However, in this conventional rotary drive device, the cylinder 43 and the cylindrical body 48 into which the piston rod 46 is slidably fitted are connected by a threaded portion 49 and are prevented from rotating by a set screw 50. , in a certain direction (for example, the forward rotation direction during excavation), the two are twisted relative to each other in the direction that strengthens the connection, but when the connection is reversed, such as when untying an auger connection, the force that breaks the connection increases. There was a problem in that the joint part 49 loosened as the screw moved by 1 degree, and as the period of use progressed, pressure loss occurred at the tip of the locking screw 50, causing play. Furthermore, there is a problem in that the seal 44 is damaged due to play, causing oil leakage.

Further, due to the occurrence of this backlash, the axis of the rotary chunk equipment b is not constant, causing the problem that the claw 58 or the auger 25 rotates while moving forward. Furthermore, there is a problem in that it is difficult to assemble, disassemble, and inspect the detent.

(Problems to be Solved by the Invention) In view of the above-mentioned problems, the present invention seeks to provide an auger rotation drive device that does not cause rattling or rocking of the rotary chuck device and is advantageous in terms of maintenance and inspection. (Means for Solving the Problems) In order to achieve this object, the present invention provides a mechanism that is movably mounted on a guide frame of a horizontal hole drilling device installed in a vertical hole, and that grips a screw auger. In an auger rotation drive device having a rotary chuck device, the rotary chuck device is
a case, a cylindrical body that is inserted concentrically into the case and has a flange at its rear end removably fixed to the case with a bolt; the cylindrical body and the rear end of the cylindrical body; A chuck claw opening/closing cylinder which is rotatably inserted into a cylindrical end member bolted to the cylindrical end member, and has a portion into which a piston rod is slidably fitted, and a chuck claw opening/closing cylinder, and the cylindrical body of the cylinder. A receiving gear is fitted to a portion protruding further forward through a detent piece, and a cylindrical metal bearing made of a wear-resistant metal is provided integrally in front of the receiving gear, and is connected to the case via a cylindrical metal bearing made of wear-resistant metal. a rotary cylindrical part that is rotatably fitted and in which a block attached to the front end of the piston rod of the cylinder is slidably fitted; A plurality of chuck claws slidably engaged with an inclined guide portion provided on the block are screwed into a male thread groove formed on the outer periphery of the front end of the cylindrical body to prevent the receiving gear from falling out. and a nut which is bent and fitted into a groove provided on the outer periphery of a locking piece that is integral with the rotation prevention piece of the receiving gear, and an auger rotation motor is removably attached to the upper part of the case, The output gear driven by the motor faces into the case from the upper opening of the case and meshes with the receiving gear, and when the motor is removed from the case, the case of the rotary charring device The internal parts are characterized in that they can be pulled out rearward as a whole by removing the bolts that fixed the flange to the case.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. In Figures 1 to 6, Figures 7 to 9
The same reference numerals as those in the drawings indicate members having equivalent machine parts.Inside the case 36A of the zero-rotation chuck device 7b, a cylindrical body 39 is inserted concentrically as in the conventional example, and the cylindrical body 39 Attach the rear end flange 39a to the case 36A with bolts 65.
(See Figures 2 and 5)
A cylindrical end member 41A and an end plate 41B are fixed to the rear end of the cylindrical body 39A with bolts 40. The chuck claw opening/closing cylinder 66 is rotatably fitted into the cylindrical end member 4LA via the sealing material 44, and the end plate 67 of the cylinder 66 is fitted into the end plate 41B with a metal bearing 69.
It is rotatably supported via the Further, in the present invention, the portion a in which the piston 45 is slidably fitted
and a portion into which the piston rod 46 is slidably fitted are integrally constructed.

Further, a receiving gear 7 formed of a bevel gear is attached to a portion of the printer 66 that protrudes forward from the cylindrical body 39 through a rotation prevention piece 70.
1 is fitted. In addition, in order to fix the receiving gear 71, as shown in FIGS. 1 and 6, a ring-shaped locking piece 72 fixed to the detent piece 70 is fitted near the front end of the b portion of the cylinder 66, A nut 73 is screwed into the male thread at the front end of the cylinder 66 to fix the receiving gear 71, and the protrusion 72a provided around the detent piece 72 is folded into the y473a provided on the outer periphery of the nut 73. By bending and fitting, the nut 73 is prevented from rotating and the receiving gear 71 is prevented from coming off, thereby preventing rattling.

Further, a rotary cylindrical portion 71 is integrally provided on the front surface of the receiving gear 71.
a, and a cylindrical metal 74 made of a wear-resistant metal is fitted around the rotary cylindrical part 71a, and the case 36A extends forward so as to be fitted with the entire surface of the metal 74. A metal bearing structure is realized in which the case 36A supports the rotating part over a longer range. The rotating cylindrical portion 71a includes
A block 60 attached to the front end of the piston rod 46
is fitted inside so that it can slide freely. In addition, rotation A, i-shaped part 71
In front of a, as shown in Fig. 4, there are radially movable,
and a plurality of sliding blow 2s 63 whose inner ends 63a are slidably engaged with inclined guide portions such as grooves 61 provided in the block 60, and chuck claws fixed to each block 63 by ports 59. 58.

At the top of the case 36A, there is a hydraulic motor 7a.
The frame 37 is removably fixed to the frame 37 using a port 75 (see FIGS. 2 and 3), and the auger rotation hydraulic motor 7a is removably fixed to the frame 37 using a port 38. Further, an output gear 53 driven by the motor 7a
from the upper surface opening 76 of the case 36A.
The motor 7
a is removed from the case 36A together with the output gear 53, the parts inside the case of the rotary chuck device (cylindrical body 39, end member 41A, cylinder 66 and its internal parts, gear 71, sliding block 57) and the claws 58 attached thereto) connect the flange 39a to the case 3.
By removing the port 65 fixed to 6A, it can be pulled out rearward as a unit.

Although the present invention has been described above with reference to embodiments, the present invention can also be applied to installation in a vertical hole such as an existing manhole in a stationary or lifting type, or to automatic excavation. , combinations, etc., various changes and additions can be made without departing from the gist of the present invention.

(Effects of the Invention) As described above, in the present invention, the piston accommodating portion of the cylinder that opens and closes the chuck claw is configured integrally with the piston rod accommodating portion, and the receiving gear is fitted into the cylinder via a rotation prevention piece. Since it is fixed by fitting the locking piece integrated with the rotation prevention piece into the groove provided on the outer periphery of the nut screwed onto the front end of the cylinder, the entire one-rotation part is prevented from wobbling. Accordingly, damage to the sealing material is prevented, and oil leakage due to leakage can be prevented.

Moreover, the receiving gear is firmly connected to the cylinder by the receiving gear rotation prevention mechanism using the above-mentioned rotation prevention piece, locking piece, and nut, and the rotating part is supported by the case via the cylindrical metal bearing. The rotating part is stably supported,
Swinging of chuck claws, etc. is prevented, and the auger is gripped by the rotating chuck device with good positional accuracy.

Furthermore, since the rotating part inside the case can be pulled out as a whole, assembly, disassembly, and maintenance/inspection work can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a rotary drive device according to the present invention, FIG. 2 is a side view of the embodiment, FIG. 3 is a plan view of the embodiment, and FIG. 4 is a diagram of the embodiment. A front view of the chuck claw portion, FIG. 5 is a rear view of the embodiment, FIG. 6 is a perspective view illustrating the receiving gear rotation prevention mechanism of the embodiment, and FIG. 7 is a horizontal hole drilling device to which the present invention is applied. FIG. 8 is a longitudinal cross-sectional view showing an example of the rotary drive device, FIG. 8 is a cross-sectional view thereof, and FIG. 9 is a vertical cross-sectional view showing a conventional rotary drive device.

Claims (1)

[Claims] In an auger rotation drive device that is movably mounted on a guide frame of a horizontal hole drilling device installed in a vertical hole and has a rotary chuck device that grips a screw auger, the rotary chuck device is installed in a case and the rotary chuck device is installed in the case. A cylindrical body that is inserted in a core shape and has a flange at its rear end removably fixed to the case with bolts, and a cylindrical end that is bolted to the rear end of the cylindrical body. A chuck claw opening/closing cylinder which is rotatably inserted into a part member and has a part in which a piston rod is slidably fitted is integrally provided, and a part of the cylinder which protrudes forward from the cylindrical body. a receiving gear fitted through a stopper; and a receiving gear provided integrally in front of the receiving gear and rotatably fitted to the case via a cylindrical metal bearing made of a wear-resistant metal; A rotating cylindrical part in which a block attached to the front end of the piston rod of the cylinder is slidably fitted; A plurality of movably engaged chuck claws are screwed into a male thread groove formed on the outer periphery of the front end of the cylindrical body, thereby preventing the receiving gear from slipping out and preventing the receiving gear from rotating. It consists of a locking piece that is integral with the case and a nut that is bent and fitted into a groove provided on the outer periphery, and an auger rotation motor is removably attached to the upper part of the case,
an output gear driven by the motor faces into the case from an upper opening of the case and meshes with the receiving gear;
When the motor is removed from the case,
The internal parts of the case of the rotary chuck device can be removed by removing the bolts that fixed the flange to the case.
A rotary chuck device for a horizontal hole drilling device, characterized in that it can be integrally pulled out backwards.