JPS627758Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a screw conveyor for conveying the excavated material rearward in the excavation direction inside a cylindrical body equipped with an excavating rotary body at the front part, and a screw conveyor is provided in the center of the excavating rotary body. The present invention relates to an underground excavation device including a deceleration drive device that decelerates and drives the excavation rotary body.

In the above-mentioned excavation equipment, a special high-torque drive device or a deceleration drive device is conventionally installed between the cylindrical body and the screw conveyor to drive the excavation rotating body with high torque. The driving device was expensive, and the large driving device required a large diameter drilling device, making it unsuitable for drilling small-diameter underground holes.

In view of the above-mentioned circumstances, the present invention aims to eliminate the above-mentioned drawbacks through extremely simple modification.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in FIG. 1, an underground excavation device 1 that is separably connected in the front and back direction is pushed into the ground by a hydraulic jack 3 along a support guide 2 as the excavation progresses. Drilling equipment part 1
When A is pushed into the ground, the rear excavator part 1B is separated from the front excavator part 1A, and a ground pipe such as a humid pipe, steel pipe, or cast iron pipe is inserted between the front and rear equipment parts 1A and 1B. The unit cylindrical body 4 to be buried therein is connected, and an internal front conveyor 5 is installed in each of the front and rear device parts 1A and 1B.
A unit conveyor 5c is connected between the rear conveyor 5b and the rear conveyor 5b, and as shown in FIG. 5c are sequentially connected between the push-in unit cylindrical bodies 4 and the rear excavation device portion 1B, thereby burying the piping consisting of the unit cylindrical bodies 4... group underground.

The front excavation device portion 1A includes a cone-shaped excavation rotating body 6 into which excavated material is introduced.
A cylindrical body 7 is connected to the rear part of the rotating body 6 concentrically with the rotational axis P of the rotating body 6, and this cylindrical body 7 is connected to the rotational axis P of the rotary body 6.
The front conveyor 5a is fitted and held in the cylindrical body 8 so as to be relatively rotatable therearound, and the front conveyor 5a is disposed concentrically with the rotation axis P through the cylindrical body 7, and the excavation rotary body 6 is decelerated. A driving deceleration drive device 9 is provided.

The rear excavator section 1B is connected to the front conveyor 5.
a rear conveyor 5b which is separably connected to the rear conveyor 5b and constitutes a series of screw conveyors 5 in the connected state, and a device 10 for driving the rear conveyor 5b;
It is composed of a rear cylindrical body 11 that houses them.

As shown in FIGS. 3 to 5, the excavating rotary body 6 includes a truncated conical excavating body 12.
On the other hand, a rib-shaped and comb-like digging claw 13A is formed on the tip surface portion, and a flat blade portion is formed on one side edge in the rotation direction and a comb-like tooth portion is formed on the other side edge in the conical surface portion. The excavation claws 13B are removably connected to each other by bolts, and an excavation material introduction opening is formed near each claw. Therefore, if the target to be excavated is gravel, the comb blades will
It is possible to selectively excavate each.

As shown in FIG. 3, the reduction drive device 9 includes a gear 14 on the peripheral surface on the rear side in the excavation direction.
A cylindrical body 15 formed with a cylindrical body 15 is fitted onto the screw conveyor 5 so as to be relatively rotatable around the rotational axis P, and around an inclined axis _P1 that intersects the rotational axis P at a small angle. An interlocking rotating body 16 having a cylindrical outer circumferential surface is key-fitted to the cylindrical body 15, and is arranged to be freely rotatable around the rotational axis P with the screw conveyor 5 externally fitted thereon. and,
A rocking gear 19 having gear parts 17 and 18 with the same number of teeth formed on both end faces is provided to be rotatable relative to the cylindrical outer circumferential surface about the inclined axis _P1 , and the cylindrical gear 14 A small-diameter gear 20 that meshes with the rotary drive device 21 is attached to a rotation drive device 21 such as a hydraulic or electric motor.

Then, the fixed gear 22 having the same number of teeth as the gear part 17 on the rear side in the excavation direction of the swing gear 19 is partially engaged with the gear part 17 and fitted onto the screw conveyor 5, and then Cylindrical body 8
As the interlocking rotating body 16 rotates around the rotation axis P, the swing gear 19 moves to a partially engaged position between its gear portion 17 and the gear 22. It is designed to oscillate in a non-rotating state while changing sequentially.

Furthermore, the rotary gear 2 has one more tooth than the gear portion 18 on the front side in the excavation direction of the swing gear 19.
4 is attached to the cylindrical body 7 connected to the rotary body 6 in a state in which it is partially engaged with the gear portion 18 and externally fitted on the screw conveyor 5. Swinging gear 19-1 due to rotation
The gear 24 is configured to rotate by one tooth around the rotation axis P while sequentially changing the partial engagement position of the gear portion 18 and the rotating gear 24 by the oscillations.

That is, the rotation of the rotary drive device 21 is decelerated and transmitted to the interlocking rotary body 16 by the gears 14 and 20, and the rotation of the interlocking rotary body 16 is ultra-decelerated to 1/the number of teeth of the gear 24. The rotational speed is transmitted to the excavating rotary body 6.

Incidentally, the number of teeth of the rotating gear 24 may be slightly more than two teeth or more than the number of teeth of the gear part 18 that partially engages the rotating gear 24, or may be slightly less than one tooth or more, or, In a state in which the numbers of teeth of the fixed gear 22 and the gear portion 17 that partially meshes with the fixed gear 22 are different, the numbers of teeth of the gear portion 18 and the rotary gear 24 may be made to match. In other words, the fixed gear 22 and the swing gear 1 that mesh with the fixed gear 22
Among the combinations of the gear portions 17 of 9 and the rotating gear 24 and the gear portion 18 of the swinging gear 19 meshing therewith, one combination has the same number of teeth and the other combination has a different number of teeth. All you have to do is do it.

In summary, the present invention provides the above-mentioned underground excavation equipment, in which the deceleration drive device 9 is configured such that the rotational axis P 1 of the excavation rotary body 6 intersects with the rotation axis P ₁ at a small angle. An interlocking rotating body 16 having a cylindrical outer circumferential surface is disposed so as to be freely rotatable about the rotation axis P by the rotary drive device 21 while being fitted onto the screw conveyor 5, and is A rocking gear 19 that is relatively rotatable around the tilted axis P ₁ is attached to the screw conveyor 5 and rotates around the rotation axis P that is interlocked with the excavation rotary body 6 while being fitted onto the screw conveyor 5. Gear portions 18 and 17 formed at both ends of the swing gear 19 are individually and partially engaged with the gear 24 and the fixed gear 22 fitted onto the screw conveyor 5, and Fixed gear 22
and the gear portion 17 of the swing gear 19 that engages therewith.
and the combination of the rotating gear 24 and the gear portion 18 of the swinging gear 19 meshing with it,
It is characterized in that one combination has the same number of teeth and the other combination has a different number of teeth.

That is, the deceleration drive device 9 is connected to the screw conveyor 5.
Although the device itself has a large diameter, it can be installed in a narrow annular space between the screw conveyor 5 and the cylindrical body 8, and is particularly suitable for small diameter holes. It has become possible to configure the excavation device 1 to have a small diameter so that it is convenient for excavation.

Moreover, by providing the deceleration drive device 9 with a super-deceleration function, it becomes possible to drive the excavation rotating body 6 with high torque while making it possible to use an easily available and inexpensive rotary drive device 21. Ta.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the underground excavation equipment according to the present invention, and FIGS. 1 and 2 are explanatory diagrams showing the state of the start and the middle of excavation of an underground hole, and FIG. FIG. 4 is a longitudinal sectional side view of the entire device, and FIG. 4 is a front view thereof. FIG. 5 is a sectional view taken along the line -- in FIG. 4. 5... Screw conveyor, 6... Excavation rotating body, 8... Cylindrical body, 9... Deceleration drive device, 17,
18... Gear part, 19... Rocking gear, 21... Rotation drive device, 22... Fixed gear, 24... Rotating gear, P... Rotating axis, P ₁ ... Inclined axis.

Claims (1)

[Scope of utility model registration request] Inside a cylindrical body 8 equipped with an excavating rotary body 6 at the front, a screw conveyor 5 for conveying the excavated material backward in the excavation direction is provided in the center of the excavating rotary body 6, and the excavating rotary body 6 is The underground excavation equipment is equipped with a deceleration drive device 9 that performs deceleration driving, and the deceleration drive device 9 includes an inclined axis P that intersects the rotation axis P of the excavation rotary body 6 at a small angle. ₁
An interlocking rotating body 16 having a surrounding cylindrical outer circumferential surface
is disposed so as to be freely rotatable around the rotational axis P by the rotary drive device 21 while being fitted onto the screw conveyor 5, and rotated relative to the cylindrical outer circumferential surface around the inclined axis _P1 . A gear 24 is attached with a freely swinging gear 19 and rotates around the rotation axis P which is connected to the excavation rotary body 6 while being fitted onto the screw conveyor 5, and The gear parts 18 and 17 formed at both ends of the swing gear 19 are individually and partially engaged with the fixed gear 22 that is fitted onto the outside, and the fixed gear 22 and the swing gear that engage with the fixed gear 22 are further engaged with the fixed gear 22. A combination of 19 gear parts 17, the rotating gear 24, and the swinging gear 1 that meshes with the rotating gear 24.
An underground excavation device characterized in that among nine combinations of gear parts 18, one combination has the same number of teeth and the other combination has a different number of teeth.