JPS6139025Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides a space for taking in excavated soil on the back of the excavation blade that excavates underground before the buried pipe.
A screw conveyor for conveying the excavated earth and sand from the intake space to the rear of the excavation equipment main body is provided with its reception port located in the intake space, and a conveyor for lifting and supplying the excavated earth and sand to the reception opening is provided. Regarding the underground excavation equipment installed in a state where it is driven and rotated around the screw conveyor, by simple modification, the earth and sand can be supplied from the conveyor to the screw conveyor more efficiently while preventing the entanglement of earth and sand between the conveyor and the conveyor. It is an object of the present invention to enable the conveyor to be carried out frequently, and also to solve the problem of clogging of the conveyor receiving port due to sand and sand with a simple structure.

Next, embodiments of the present invention will be explained based on illustrative drawings.

As shown in FIG. 1, the pipe bodies 2 to be buried, such as humid pipes, steel pipes, and cast iron pipes, are sequentially connected to the rear of the main body of the underground excavation equipment 1, and the rearmost pipe body 2
At the rear of the screw conveyor 4, which is supported on a base 3 and conveys the excavated soil of the underground excavation equipment 1 to the rear of the main body, a screw conveyor forming unit 5 is installed inside each tube body 2. The conveyor forming unit 5 at the rear end is connected to the screw conveyor 7 which can be freely driven by the drive device 6 of the base 3, and these are advanced by the hydraulic jack 8, and the excavation equipment 1 is moved forward by the hydraulic jack 8. The underground excavation is performed in advance of the buried pipes 2..., and the excavated earth and sand is taken out from the discharge port 9 of the screw conveyor 7, and a series of pipes formed by the pipe bodies 2... are buried underground. .

The underground excavation apparatus 1 is constructed as follows.

That is, as shown in Figures 2 to 4,
1 that is rotationally driven around the axis of the drilling equipment main body 10
The excavated earth and sand are excavated by a plurality of center excavation blades 11 and a plurality of side excavation blades 12, and the excavated soil is removed from the gap S between the mounting member 13a of the excavation blades 11, 12 and the attached plate 13b, and the above-mentioned A plurality of circular arc-shaped through holes 14 formed in the plate body 13b lead to a space 1 provided at the back of the excavating blades 11 and 12.
5, is lifted up from the upper part of the intake space 15 by a plurality of transport bodies 16 that are rotationally driven around the screw conveyor 4, and is then dropped and supplied to the receiving port 4a of the screw conveyor 4. It's like this.

In order to drive the excavation blades 11 and 12, the rotary cylindrical body 17, which has the excavation blade attachment member 13a attached to the excavation equipment main body 10, is connected to the rotary cylinder shaft 18 and the rear end of this rotary cylinder shaft 18. Three hydraulic motors 20 with reduction mechanisms are connected via gears 19 attached to the side.
The excavator blade attachment member 13a is driven by three motors 20 in conjunction with the respective pinion gears 21. Further, the conveying body 16 is connected to the cylindrical body 17 and the excavator blade attachment member 13a, and is driven by the motor 20.

In the earth and sand intake space 15, as shown in FIG. Freely installed roller guide 23a
Then, the sheet metal guide 23b extending from the conveyor cylindrical body 4b is inserted into the conveyor 16 with respect to the receiving opening 4a.
As shown in FIG.
is configured to be rotationally driven in a direction opposite to the rotational direction of the conveyor body 16, thereby forming a gap between the rotational inner end of the conveyor body 16 and the conveyor cylinder body 4b to prevent dirt from being entrapped. Both guides 23
a and 23b, the guide 23a rotates so that the supply of earth and sand from the conveyor 16 to the receiving port 4a is carried out without spilling.
It is designed to prevent the bridging phenomenon of earth and sand across both guides 23a and 23b due to the breaking action caused by the forced transfer of the earth and sand.

When the roller guide 23a is driven by the conveyor 4, as shown in FIG.
The mounting bracket 22 is configured to be swingable around the pivot shaft 24 with respect to the conveyor cylinder body 4b, and
If the spring 25 that biases the roller guide 23a against the screw 4c is provided in such a way that the biasing force can be adjusted using the screw 26, the guide 23a can always be brought into contact with the screw 4c in an appropriate pressing state, and the drive can be controlled. This can be done more smoothly and reliably. Moreover, as shown in FIG. 7, the guide 23a
When the rotating support shaft 27 and the screw shaft 4d are interlocked with each other by a gear mechanism built into the transmission case 28, reliable driving can be performed without any trouble caused by dirt adhering to the gears. The roller guide 23a may be made of metal, but its surface may be coated with rubber if necessary.

The main target 29 and the sub-target 30 shown in FIG. 2 are used to monitor the buried pipe bodies 2 from behind with a telescope 31 in order to detect changes in the direction of excavation propulsion of the excavation rig 1. Moreover, the hydraulic jack 32 shown in FIG.
This is for correcting the direction of excavation propulsion by changing the connection angle of the front side portion 10a of No. 0 with respect to the rear side portion 10b. Further, the resistor 33 shown in FIG. 2 is used to adjust the amount of protrusion from the excavation apparatus main body 10 by swinging the hydraulic jack 34 to correct the excavation driving direction of the excavation apparatus 1.

The conveyance body 16 can be changed to various types with different numbers and specific shapes.

Further, the roller guide 23a may be provided on the side where the transport body 16 descends with respect to the receiving port 4a, and the guide 23b may be provided on the side where the transport body 16 rises with respect to the receiving port 4a.

Further, if the guide 23b is provided, the supply of earth and sand from the conveyor 16 to the receiving port 4a is performed in a state where the earth and sand are not spilled, but the guide 23b can be omitted if necessary.

In summary, the present invention provides the above-mentioned underground excavation device with a guide 23a that guides the earth and sand from the conveyor 16 to the receiving port 4a, and the guide 23a is composed of a freely drivable roller. Features.

In other words, by adding a simple modification such as providing the guide 23a, the conveyor 1
The earth and sand from 6 can now be reliably supplied to the receiving port 4a without spilling to the outside. Incidentally, as a means to ensure that the earth and sand are supplied to the receiving port 4a, it is conceivable to bring the rotating inner end of the conveyor 16 close to the cylindrical body 4b of the conveyor 4, but in this case, the conveyor 16 and the conveyor Cylindrical body 4b
It becomes easy for dirt to get caught in between. However, according to the above configuration, a relatively large gap can be formed between the rotational inner end of the conveyor 16 and the conveyor cylinder body 4b,
Prevents dirt and sand from getting entangled. Furthermore, if highly viscous earth and sand is taken into the earth and sand intake space 15, the highly viscous earth and sand will not enter the screw conveyor 4 and will accumulate on the receiving port 4a, blocking the receiving port 4a and causing trouble. Although it may be easy to do so, by forming the guide 23a with a freely drivable roller, it is possible to prevent earth and sand from clogging the receiving port 4a due to the breaking action caused by its forced transfer. If the guide 23a is a roller,
Since it is rotatably driven, it can be driven smoothly even with a relatively simple drive structure such as a friction type or gear type as shown in the embodiment, and it can be made less prone to failure while being advantageous in terms of cost. As a whole, the earth and sand can be efficiently and reliably supplied to the conveyor 4, and the earth and sand can be taken out smoothly and quickly, while being economically advantageous and making it difficult to cause damage to the equipment due to the encroachment of earth and sand. I was able to do it.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the underground excavation equipment according to the present invention, and FIG. 1 is a side view in a working state, FIG. 2 is a longitudinal sectional view, FIG. 3 is a front view, and FIG. FIG. 5 is a cross-sectional view of FIG. FIG. 2... Buried pipe, 4... Screw conveyor, 4a...
Receiving port, 10... Excavation device main body, 11, 12... Excavation blade, 15... Earth and sand intake space, 16... Transport body, 23
a...Guide.

Claims (1)

[Scope of utility model registration request] Excavation blade 1 that excavates underground in advance of buried pipe 2
A screw conveyor 4 is provided with an intake space 15 for excavated earth and sand at the back of the excavated earth and sand from the earth and sand intake space 15 to the rear of the excavation equipment main body 10, and its reception port 4a is connected to the intake space 15. The underground excavation equipment is provided with a conveyor 16 located inside the screw conveyor 4 and driven to rotate around the screw conveyor 4 for lifting and supplying excavated soil to the receiving port 4a, the conveyor 16 An underground excavation device characterized in that a guide 23a is provided for guiding the earth and sand from 16 to the receiving port 4a, and the guide 23a is constituted by a freely drivable roller.