JPH0649592U - Vertical shaft drilling equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the propulsion resistance when press-fitting the liner plate of the shaft excavation equipment. [Composition] The elevating member 3 moves up and down while being regulated by the main frame 1 assembled on the shaft a to be excavated,
The excavation support portion 4 detachably provided below the elevating member 3 supports the excavation portion 7, and the motor 8 provided in the excavation portion 7 rotates the cutter 9 on a plane perpendicular to the excavation direction. And promote in the direction of excavation. In the shaft excavating device in which the liner plate D is press-fitted into the inner surface of the shaft with its propulsion, the liner plate D is divided into a plurality of divided portions 25 to 28, and these are connected to each other to form a tubular body. Thin steel plate 30 on the outer periphery of the parts 25 to 28
Circumscribe ~ 33 and connect them.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for providing a starting shaft and a reaching shaft or a manhole shaft for excavating when performing horizontal piping work in the ground.

[0002]

[Prior art]

 Conventionally, the so-called propulsion method is not used to excavate the entire area where piping should be performed, but a minimum vertical start pit and arrival pit are provided to blind the lead pipe horizontally from the start pit to the arrival pit. And lead the laying pipe along this lead pipe. For that purpose, before starting the piping work, it is necessary to first press-in a plurality of liner plates while perforating the starting pit and the reaching pit vertically downward. In addition, liner plates may be used in the same way as above when forming manholes.

[0003]

[Problems to be solved by the device]

 However, since the liner plate has a cylindrical shape, the components such as the main frame of the shaft excavating device could be obstructed and could not be press-fitted into the soil. Further, since the liner plate has a cylindrical shape and its surface is formed in a corrugated shape, there is a problem that the propulsion resistance due to the sand is large.

It is an object of the present invention to enable a liner plate to be press-fitted into the ground even in a shaft excavating device equipped with a main frame, and to press the liner plate into the ground by the shaft excavating device. The purpose is to reduce propulsion resistance.

[0005]

[Means for Solving the Problems]

 Therefore, in the present invention, the elevating member is moved up and down while being regulated by the main frame assembled on the vertical shaft to be excavated, and the excavating portion is supported by the excavating support part which is detachably provided below the elevating member. For shaft excavation, the cutter is rotated in a plane perpendicular to the excavation direction by the drive unit provided in the excavation section and propelled in the excavation direction, and the liner plate is press-fitted into the inner surface of the shaft with the thrust. A vertical shaft characterized by dividing the liner plate into a plurality of parts and connecting them into a tubular body, and providing a thin plate around the outer periphery of the liner plate and connecting the liner plate to the liner plate. The main point is the equipment for excavation.

[0006]

[Action]

 Since the liner plate is divided into a plurality of divided parts, it is possible to assemble and connect the divided parts after entering the small shaft excavator, and press fit the assembled liner plate. Further, since a thin plate is provided around the outer periphery of the liner plate and connected to the liner plate, the propulsive resistance of the liner plate when excavating a vertical shaft can be reduced, and excavation time and power can be saved.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. The excavation device main body A of FIG. 1 is provided on a vertical shaft a. A hydraulic cylinder 2 is provided in the main frame 1, and the lifting member 3 is lifted and lowered by operating the hydraulic cylinder 2. An upper part of the excavation support part 4 is detachably attached to the elevating member 3, and the excavation support part 4 is also elevated by elevating the elevating member 3. The excavation support portion 4 is attached so as to penetrate the inside of the regulation portion 5 of the main frame 1, and the ascending / descending direction of the climbing member 3 and the excavation support portion 4 is regulated. The excavation support portion 4 supports the excavation portion 7 at its tip portion 6, and the elevation of the excavation support portion 4 also raises and lowers the excavation portion 7. As shown in FIG. 2, the cutter 9 has a cylindrical cutter frame 10, the drive shaft 12 of the motor 8 is connected to the center of the cutter frame 10, and the cutter 9 rotates about the axis b. The cutter 9 is rotated while urging the elevating member 3 and the excavation unit 7 in the descending direction by the hydraulic cylinder 2. Four cutter frame wings 11 are provided around the drive shaft 12. Two fan-shaped flat plate portions 13 are provided inside the cutter frame 10. The inner tip of the flat plate portion 13 is connected to the drive shaft 12, and the outer tip end thereof is connected to the cutter frame 10. In addition, a space is provided between the flat plate portions 13, through which the earth and sand are discharged. A plurality of main cutters 15 extend obliquely downward from the tip portion 14 in the rotation direction of the flat plate portion 13 to excavate the earth and sand in the inner portion of the cutter frame 10. When the cutter 9 rotates, the tip of the main cutter 15 penetrates into the sand and excavates the surface. An outer peripheral cutter 17 is projectingly provided on the outer side surface 16 of the cutter frame 10 to excavate a peripheral portion c of the vertical shaft a. By this excavation, a space in the shaft into which the liner plate D 1 is press-fitted is formed. A leading cutter 23 connected to the drive shaft 12 of the motor 8 is provided on the lower side of the center of the cutter 9 to ensure the downward direction of the excavation part and the rotational stability of the cutter 9. The earth and sand excavated by the outer peripheral cutter 17 is once accumulated outside the cutter frame 10. When the cutter frame 10 descends while excavating the earth and sand, the earth and sand flows over the cutter frame 10 into the inside of the cutter frame 10, and is removed outside by the bucket 18 together with the earth and sand excavated by the main cutter 15.

Next, returning to FIG. 1, the discharge of earth and sand by the bucket 18 and the like will be described. The bucket body 19 of the bucket 18 is loosely fitted into the cutter 9 with the intake port 20 opened to take in the excavated earth and sand. The bucket 18 is moved up and down between the cutter 9 and the upper portion 21 of the main frame 1 by an elevator (not shown). The bucket 18 is provided with a bucket body 19 and a bucket support portion 22 that can be loosely fitted in the cutter 9, and the bucket body 19 is rotatably supported by the bucket support portion 22. In addition to the intake port 20 provided on the side portion of the bucket body 19, an unillustrated earth discharging port is provided on the upper portion thereof to raise the bucket 18 to the upper portion 21 of the main frame 1. Then, the earth and sand taken in is discharged from the earth discharge port to the outside of the shaft a by tilting the bucket body 19.

Next, the liner plate D which is the gist of the present invention will be described in detail. As shown in FIG. 3, the excavation part 7 has three legs, and the legs make an angle of 120 degrees and extend outward in the circumferential direction. The liner plate D is divided into four divided portions 25 to 28, which are connected with screws to form a cylindrical body. The reason why the liner plate D is divided is that otherwise the structural parts such as the main frame in the excavating device main body A will be obstructed and the liner plate D cannot be inserted. Thin steel plates 30 to 33 are circumferentially provided and connected to the outer peripheral portions of the respective divided portions 25 to 28. This reduces propulsion resistance when the liner plate D 1 is press-fitted. The lower end of the first liner plate D is fixed to the end of the excavated portion 7 with a screw 32. At this time, as shown in FIG. 4, the liner plate D is positioned outside the cutter frame 10 and inside the outer peripheral cutter 17. When the depth of the excavated vertical shaft a exceeds the height of the first liner plate D when the cutter 9 is rotated by the motor 8 fixed to the excavation unit 7 and the depth of the excavated shaft a exceeds the height of the first liner plate D, as shown in FIG. The lower end of the second liner plate E is fixed to the upper end of the second liner plate D. Then, the first liner plate D and the second liner plate E are press-fitted into the ground, and the depth of the shaft a excavated is the combined height of the first liner plate D and the second liner plate E. When it goes over, the lower end of the third liner plate is fixed to the upper end of the second liner plate E. Similarly, the excavation and press-fitting of the liner plate are sequentially repeated until the vertical shaft a reaches a desired depth. As a result, a predetermined number of liner plates are press-fitted onto the entire inner surface of the shaft a. The liner plates may be connected to each other by screws, or a so-called latch structure may be formed by connecting the claw-shaped portion and the groove portion.

When the excavation progresses and the elevating member 3 reaches the lowest position where it can be lowered by the hydraulic cylinder 2 as shown in FIG. 6, the following operation is performed for further excavation. First, the raising / lowering member 3 and the excavation support portion 4 are separated, and only the raising / lowering member 3 is raised. As a result, as shown in FIG. 7, an interval having the same length as the range in which the elevating member 3 ascends and descends is generated between the elevating member 3 and the excavation supporting part 4, and the excavating supporting part 40 for this interval causes the elevating member 3 The excavation support 4 is connected to extend the length of the excavation support. As a result, the cutter 9 can be urged in the direction in which it descends from the surface d to be excavated, so that excavation similar to the above can be performed deeper and the liner plate can be press-fitted. By repeating such an operation, the vertical shaft a having a predetermined depth is excavated and a predetermined number of liner plates are press-fitted.

After the excavation is completed in this way, the excavation portion 7, the motor 8 and the cutter 9 are removed from the shaft as follows. Before pulling up the excavation part 7 and the cutter 9, the outer peripheral cutter 17 is removed from the cutter frame 10 so that the outer peripheral cutter 17 does not collide with the liner plate D, thereby eliminating obstacles. Further, the liner plate D and the excavated part 7 are separated by releasing the fixation between the excavated part 7 and the first liner plate D. Therefore, the excavation unit 7, the motor 8 and the cutter 9 can be pulled up and removed from the vertical shaft a.

Needless to say, various embodiments can be taken without departing from the scope of the present invention. For example, in the embodiment, the liner plates D, E, etc. are installed by fixing the first liner plate D to the excavation part 7 and then sequentially fixing the second liner plate E and subsequent parts from above, but the part to be excavated. If the soil is weak like sandy soil, the surrounding liner plates D, E, etc. will collapse and give resistance to the liner plates D, E, etc. In some cases, it cannot be lowered with 7. In such a case, instead of stacking the liner plates in the connecting order from the bottom to the top as in the embodiment, it is possible to connect the liner plates from the top to the bottom. That is, the first liner plate D is fixed to the upper part of the vertical shaft, and the second liner plate E is divided and passed through the inside of the first liner plate D 1 and lowered to below the liner plate E 1. assemble. Next, by fixing the upper end of the second liner plate E to the lower end of the first liner plate D, the liner plate can be provided in the excavated portion. At this time, the first liner plate D may be fixed by connecting it to the main frame 1, and the installed liner plates D and E are the positions of the liner plate D and the liner plate E in FIG. Will be in the opposite state.

[0013]

[Advantage of the Invention] It is possible to press the liner plate into the ground even with a shaft excavating device having a main frame, and to reduce propulsion resistance when the liner plate is pressed into the ground by the shaft excavating device. You can

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing the entire device of the present invention.

FIG. 2 is a perspective view of a cutter.

FIG. 3 is a perspective view showing a relationship between a cutter and a liner plate D.

FIG. 4 is a partial cross-sectional view showing a relationship between a cutter and a liner plate D.

5 is a partial cross-sectional view showing the relationship between a cutter and a liner plate D. FIG.

FIG. 6 is a partial cross-sectional view showing the entire apparatus in which liner plates D and E are press-fitted into the ground.

FIG. 7: After press-fitting liner plates D and E into the ground,
It is a fragmentary sectional view which shows the whole apparatus which added the excavation support part. 1 Main Frame 2 Hydraulic Cylinder 3 Lifting Member 4 Excavation Supporting Part 5 Regulation Part 6 Tip Part 7 Excavation Part 8 Motor 9 Cutter 10 Cutter Frame 11 Cutter Frame Wing 12 Drive Shaft 13 Flat Plate Part 14 Tip Part 15 Main Cutter 17 Peripheral Cutter 20 Take Inlet 21 Upper part 22 Bucket support part 25-28 Divided part 32 Screw A Device body D 1st liner plate E 2nd liner plate a Vertical shaft b Axis c Peripheral part d Excavation surface

Claims (1)

[Scope of utility model registration request] 1. An elevating member ascends and descends while being regulated by a main frame assembled on a vertical shaft to be excavated, and an excavating portion is detachably supported below the elevating member to support the excavating portion. A shaft excavating device for propelling the liner plate into the inner surface of the shaft with the propulsion in the excavating direction while the cutter is rotating on a plane perpendicular to the excavating direction by the drive unit provided in the section. A device for shaft digging, characterized in that the liner plate is divided into a plurality of parts and they are connected to each other to form a tubular body, and a thin plate is provided around an outer peripheral portion of the liner plate and is connected to the liner plate.