JPH0220724A - Soil lifting-up device for longitudinal underground hole - Google Patents

Abstract

PURPOSE:To efficiently lift up soil by installing a pair of endless belts a part of which is closely attached, between the belt wheels which are installed in the upper and lower parts of the expandable multistage frames and nipping and upwardly shifting an excavate substance by the closely attached parts. CONSTITUTION:Multistage type frames 15 and 20 which can be extended and contracted vertically downward are installed in the intermediate part of a girder 11 which is arranged over a longitudinal hole excavating part 12. Then, a pair of endless belts 30 and 31 a part of which is attached closely each other are laid between the belt wheels 10B, 11B, 23A and 23B which are vertically arranged for the frames 15 and 20, and a tension is always applied by a tension adjusting means. An excavated article is nipped in the closely attached parts of the both belts 30 and 31, and the belts 30 and 31 are driven so that the closely attached parts are shifted upwardly by a belt driving means. Further, the multistage frames 15 and 20 are extended and contracted according to the depth of the excavation part 12, and a new frame is added between the upper and lower frames 15 and 20.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an underground vertical hole lifting device, and is particularly used for excavating deep, large-scale holes when constructing bridge piers or underground parts of high-rise buildings. This article relates to an underground vertical pit lifting device.

[Conventional technology]

When excavating a deep, large-scale hole to construct the underground part of a large building, if the depth of the hole is several tens of meters or more, it becomes a large-scale work to carry out the excavated earth and sand.

Generally, as shown in FIG. 9, excavated materials 3 such as earth and sand excavated by a backhoe 2 are carried to the ground surface 4 using a universal door/ray lifter 1, and then transported to the ground surface 4 by a tractor excavator 5.
The soil is loaded one after another into a dump truck (not shown) and transported to a place where it can be dumped (for example, a landfill, etc.) (for example, Japanese Patent Publication No. 57-55853). In this case 5
The depth of the hole gradually increases, so at first, the depth of the hole is 2.
A book guide post is installed, and the vertical part of the universal tray lifter 1 is guided by the book guide post to extend downward. However, since there is usually a limit to the length of the endless tray IA of the universal tray lifter 1, there is a limit to the stroke L, and when drilling a hole more than 10 meters deep, the universal tray lifter 1 must be replaced several times. Then, the universal tray lifter 1 must be gradually made larger.

It is also common practice to use a Terha instead of a universal tray lifter to lift excavated material to the surface.

[Problem to be solved by the invention]

However, the universal tray lifter is guided by two guide columns and slides up and down, so when the depth is large, the guide columns become long and it becomes difficult to ensure accuracy. In addition, the guide posts must be removed after the excavation is completed, and this removal work is difficult. Furthermore, since the stroke of the endless tray is limited due to the relationship with other equipment, the number of refills increases.

In addition, because Terha uses packets for lifting work, the work is not continuous and is inefficient.

An object of the present invention is to provide an underground vertical hole drilling device that can accurately and efficiently dig large-scale deep holes.

[Means to solve the problem]

In order to achieve the above object, the underground vertical hole lifting device of the present invention includes: a girder disposed straddling the vertical hole excavation section; a multi-stage frame provided in the middle of the girder and expandable vertically downward; A pair of belt pulleys are placed below the frame, and a portion of the belt pulleys is hung between the upper and lower belt pulleys, and a portion of the belt pulleys are in close contact with each other. a pair of endless belts, a belt driving means for driving the belts, a tension adjusting means for adjusting the tension of the belt according to the expansion and contraction of the frame, and a belt on both sides in the width direction of the belt at the close contact part of the belt. a plurality of belt clamping means for clamping the belts 1 and moving in the vertical direction according to the expansion and contraction of the frame, and a guide member for guiding the movement of the belt clamping means in the vertical direction;
It is equipped with the following.

Further, the frame can be divided into upper and lower parts, and a new frame can be inserted between the upper and lower divided frames.

[Effect]

According to the above configuration, when the depth of the excavated part is still relatively shallow at the start of excavation, the multi-stage frame is retracted, and the belt driving means is used to drive the belt so that the close contact part of the belt moves upward. drive

At this time, a constant tension is applied to the belt by the tension adjustment means, and the belt will not loosen.

Therefore, as the belt moves, the excavated material held between the belts is conveyed upward and discharged to the outside.

Further, as the excavation progresses and the depth of the excavated portion becomes deeper, the frame is extended according to the depth, and the excavated material held between the belts is conveyed upward in the same manner as described above. At this time as well, a constant tension is applied to the belt by the tension adjustment means.

Furthermore, as the excavation progresses and the excavated area becomes deeper, it will not be long enough to fully extend the frame, so the frame will be divided into upper and lower parts and a new frame will be added between the divided frames. By doing so, it becomes possible to drill even deeper holes.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall configuration of an underground vertical earth lifting device according to the present invention. As shown in the figure, a girder 1 having a frame 10 at the upper center is installed across an excavation part 12. On one side of the girder 11 is a hopper 1 that temporarily stores earth and sand.
3 are arranged.

Reference numeral 14 indicates a truck to which earth and sand etc. are supplied from the hopper 13.

Further, the pedestal 1o is provided with an upper frame 15, and the upper frame 15 is guided by four guide rails 16 to move in the vertical direction.

17 is provided on the upper frame 15, and a guide rail 16
It is a guide wheel that comes into contact with the A stopper 18 is fixed to the lower end of the guide rail 16.
8 restricts the downward movement distance of the upper vertical conveyance body 15.

A lower frame 20 is arranged below the upper frame 15, and both frames 15, 20 are connected by a removable pin 21. A projecting frame 22 extending upward is provided on the side surface of the lower frame 20. Further, a table feeder 23 is attached to the lower part of the lower frame 20 to receive objects transported by a backhoe or the like. 2
Reference numeral 4 denotes a steady rest device that prevents the earth lifting device from swinging by pushing the metal fitting 25 into the ground using a hydraulic jack or the like.

Reference numeral 19 denotes a bar screen for preventing large pieces of conveyed material from being mixed into the table feeder 23.

Furthermore, two sheaves 26 are attached to the upper part of the frame 10, and three sheaves 27 are attached to the upper part of the lower frame 20, and wire ropes 28 are hung alternately between the sheaves 26 and 27. One end of the wire rope 28 is connected to the frame 10
It is connected to the upper winch 29, and the other end is fixed to the upper part of the frame 10.

In addition, belt pulleys 15A, 15 are provided on the upper part of the upper frame 15.
B has belt pulleys 23A and 2 at the bottom of the table feeder.
3B, and a driving side belt 30 is placed between the belt pulleys 15A and 23A, and a driven side belt 31 is placed between the belt pulleys 15B and 23B. Both belts 30, 31 are configured to be in close contact with each other from the lower frame 2o to the upper frame 15 (this location will be described in detail later). The drive side belt 3o is connected to a conveyor drive section 33 near the hopper 13 via a horizontal belt section 32. The horizontal belt portion 32 is swingable about fulcrums 34 and 35. 36 is a twin take-up device that applies tension to the drive side belt 3o. On the other hand, the driven side belt 31 includes a belt pulley 10B attached to the frame 10 and a belt pulley 11 attached to the gutter 11.
It is connected to the twin take-up device 37 via B. The twin take-up device 37 is for applying tension to the driven side belt. Reference numerals 38 and 39 denote slide shoes that serve as guides when the lower frame 20 moves up and down inside the upper frame 15. Incidentally, the twin take-up devices 36 and 37 constitute tension adjustment means.

Next, the structure of the close contact portion between the drive side belt 30 and the driven side belt 31 will be explained in detail.

As shown in FIGS. 5 to 7, a belt clamping device 40 is disposed between the upper frame 15 and the lower frame 20. This belt clamping device 40 is a drive side belt 3
0 and the driven side belt 31, both belts 30.3
1 are sandwiched by rollers 41 on both sides in the width direction, and a large number of brackets 42 to which the rollers 41 are fixed are disposed, and three locations of these brackets 42 are connected to each other by chains 43. The bracket 42 is guided by a guide pipe 44 as a guide member of the overhang frame 22. The upper end of the chain 43 is connected to the slide shoe 39 by a fixing pin 45, and the lower end is fixed to a part of the lower frame 2o by a bolt 46. In addition. In the figure, 47 is a guide frame guided by the slide shoe 39, and 48 is a connecting member that connects the left and right guide frames 47 at several locations.

Next, the operation of this embodiment will be explained.

As shown in Figure 1, the depth of the excavated part at the start of excavation is Ll.
In the first stage, the winch 29 pulls the wire rope 2
8 is completely rolled up and the upper frame 15 is held at the highest position. In this case, the twin take-up device 36
．． 37, sufficient tension is applied to the drive side belt 30 and the driven side belt 31. When the conveyor drive unit 33 is driven, the driving belt 30 moves, and the driven belt 31 that is partially in close contact with the driving belt 30 also moves under the force of the driving bell I-30. Further, the close contact portions of both belts 30, 31 move upward. Here, if earth and sand etc. are fed into the table feeder 23, the earth and sand is held between both belts 30 and 31 and conveyed upward, and is carried into the hopper 13 via the horizontal conveyor section 32 of the drive side belt 30. .

In the second stage, in which the excavation section is dug until the depth reaches L2, as shown in FIG. , the upper frame 15 is brought into contact with the stopper 18 eventually. In this case, the drive side belt 3
Since the horizontal conveyor section 32 of 0 rotates counterclockwise around the fulcrum 35, the hopper 1
Earth and sand up to 3 can be transported without any problem.

As a result of further digging, in the third stage until the depth of the excavated part reaches L3 as shown in FIG. Of the provided sheaves 27, the middle sheave 27 is separated and fixed to the upper part of the frame 1o, and the connecting pin 21 connecting the upper frame 15 and lower frame 20 is removed to separate both frames 15 and 20. . and,
The wire rope 28 is further wound back by the winch 29, and lifting work is performed while lowering the lower frame 2o.

Then, in the fourth stage, when the depth of the excavated portion reaches L3, a supplementary frame 51 with rollers 5o is inserted between the upper frame 15 and the lower frame 20, as shown in FIGS. 4 and 8. After setting the twin take-up devices 36 and 37 to the lowest position, the drive side belt 30
and the driven side belt 31 is additionally replenished. Then, the upper part of the bell mill clamping device 40 is fixed at a predetermined position under the additional frame 51. Note that slide shoes 52 and 53 are provided at the bottom of the refill frame 51.

Thereafter, the same operation as in the third stage is performed, and after the belt clamping device 40 has been lowered to the extent that it can be expanded and contracted, a new additional frame 51 is added and inserted between the additional frame 51 and the lower frame 20. Then, the operations in the fourth and third stages are repeated to lift soil to the desired depth. As the depth increases, the upper and lower frames 1115.20 and the additional frame 51
The lateral vibration becomes large, but the steady rest device 24 is used to suppress this lateral vibration.

In this embodiment, it is also possible to reduce the number of replenishments by increasing the number of belt pulleys in the twin take-up device and the expansion/contraction margin of the belt clamping device.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to lower the lower frame according to the depth of the excavation part and quickly lift up earth and sand, so that large-scale deep holes can be drilled with high precision. And it becomes possible to dig with high efficiency.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an underground vertical earth lifting device according to the present invention;
Figures 2 and 3 show how the soil lifting device is lowered depending on the depth of the hole, Figure 4 shows how the refilling frame has been added, and Figure 5 shows details of the belt clamping device. figure,
6 is a view taken along the line ■-VI in FIG. 5, FIG. 7 is a sectional view taken along the line ■--■ in FIG. 3, and FIG. 8 is a sectional view taken along the line ■--VI in FIG.
FIG. 9, a sectional view taken along the line -■, is a diagram showing the state of excavation according to the prior art. DESCRIPTION OF SYMBOLS 10... Frame, 11... Girder, 12... Excavation part, 13... Hopper, 15... Upper frame, 16
...Guide rail, 18...Stopper, 20...
Lower frame, 21... Connection pin, 22... Overhanging frame, 23... Table feeder, 26.27.
... Sheave, 28... Wire rope, 29... Winch, 30... Drive side belt, 31... Driven side belt, 33... Belt late moving part, 36, 37 Take-up device, 4o... ...Belt clamping device, 41, 50...Roller, 42...Bracket, 43...Chain, 5
1...Additional frame.

Claims (1)

[Scope of Claims] 1. A girder disposed across the vertical hole excavation section, a multi-stage frame provided in the middle of the girder and extendable vertically downward, and a pair of frames disposed above and below the frame. a pair of endless belts that are hung between the upper and lower belt pulleys, parts of which are in close contact with each other, and which are pulled out and pulled back in accordance with the expansion and contraction of the frame; and a belt driving means for driving the belt, a tension adjusting means for adjusting the tension of the belt according to the expansion and contraction of the frame, and a tension adjustment means for clamping both sides of the belt in the width direction at a close contact part of the belt, and a belt driving means for adjusting the tension of the belt according to the expansion and contraction of the frame; An underground vertical pit earth lifting device comprising a plurality of belt clamping means that move in the vertical direction, and a guide member that guides the vertical movement of the belt clamping means. 2. The apparatus according to claim 1, wherein the frame can be divided into upper and lower parts, and a new frame can be inserted between the upper and lower divided frames.