JP4077281B2 - Shaft excavator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a shaft excavation device in a shaft for construction of underground structures such as an underground power plant and an oil storage base, a work shaft as a start base for a horizontal shaft (tunnel) excavation, and the like. Further, the present invention relates to a shaft excavating apparatus that can be adapted to shaft excavation with a large diameter and a large amount of shear discharge.
[0002]
[Prior art]
Recently, various plans for underground use have been actively proposed, and in particular, shafts with ultra-deep depths of 500 m or more and large diameters are required. Since the amount of discharge increases, the efficiency of the projecting work largely controls the construction period and cost of the entire excavation work plan.
[0003]
As a conventional technique for performing a sliding operation using a shearing kibble, there are a first kibble suspension means that moves up and down between the ground and the scaffold or the bottom, and a second that moves up and down between the scaffold and the bottom. Kibble suspension means When A squeezing device using a squibble kibble system that performs a squeezing operation on an empty kibble during a squeezing operation of an actual kibble while performing a quizing operation between the first and second quibbing suspension means. is there.
[0004]
As a shaft excavating apparatus using the alternative kibble method, for example, Patent Document 1 and the applicant of the present invention first. Proposed Japanese Patent Application No. 2001-89200, Japanese Patent Application No. 2001-181713, Japanese Patent Application No. 2001-261133, Japanese Patent Application No. 2001-304872 No. There is.
[Patent Document 1]
Japanese Patent Application Laid-Open No. 11-294063
[0005]
In these replacement kibble-type sliding devices, one shearing kibble suspended by the first suspension means and the other shearing kibble suspended by the second suspension means are connected to the scaffold and / or the shaft. The replacement kibble operation to be replaced at the bottom is performed, and two shearing kibbles are used alternately.
[0006]
For example, in the case of Patent Document 1, a kibble passage hole is provided at a position deviated from the center of the Scaffold shaft, Zuri Kibble is It is connected to a wire for unloading (kibble rope) via an automatic hook and is suspended so that it can be moved up and down by driving a kibble hoist installed on the ground. Scaffolding Between the middle deck portion and the lower deck portion, a replacement kibble is provided so as to be horizontally movable by being suspended by a hoist.
[0007]
According to these replacement kibble systems, compared to a single excavating and extruding device using a large shearing kibble, there is less interruption of the extruding operation and the work efficiency is improved, and the ejecting is carried out at one time. The advantage that the kibble hoisting equipment etc. is small and inexpensive because the amount is small There The
[0008]
[Problems to be solved by the invention]
However, although improved , In the case of the replacement kibble method, it can be placed on a scaffold with limited space and / or on the bottom of the shaft. The In order to ensure safe work as a complicated replacement kibble operation is performed Is To some degree Training Since the efficiency of the projecting operation is reduced only by the time for performing the replacement kibble operation, it is difficult to sufficiently cope with shaft excavation with a large amount of shear discharge.
[0009]
In addition, when the replacement kibble operation is performed, the replacement kibble moves horizontally on the scaffold, so that an unbalanced load is applied to the scaffold. There is a risk that the safety of the vehicle may be impaired and the passage of the kibble to be carried out may be hindered.
[0010]
Furthermore, since the first kibble suspension means (kibble hoisting machine and kibble rope) moves the unloading kibble up and down at a position deviated from the center of the vertical shaft, When carrying in and carrying out materials and equipment necessary for excavation of a mine (tunnel), it is difficult to raise and lower a large or heavy material or equipment in a stable state.
[0011]
Therefore, in the present invention, in a state where a complicated replacement kibble operation is omitted, a plurality of shear kibbles are used to perform the projecting work in the shaft safely and efficiently, and when performing tunnel excavation from the shaft, Provided is a shaft excavation apparatus that can easily carry in and carry out equipment and the like.
[0012]
[Means for Solving the Problems]
The shaft excavation device according to the present invention includes a scaffold suspension means that can suspend a scaffold and move up and down in the shaft, and a plurality of lifts that can move up and down between the ground and the bottom of a shaft by hanging a shear kibble. A kibble suspension means, and each kibble rope of the kibble suspension means is suspended in a symmetrical position with respect to the center of the scaffold, and a kibble passage hole for each shear kibble is formed in the scaffold. Scaffold rope suspension points are provided on both sides of each kibble passage hole, and each kibble passage hole and scaffolding rope suspension point are arranged in series on a horizontal plane perpendicular to the shaft center. Yes.
[0013]
In this shaft excavator, each shear kibble suspended by a plurality of scaffold suspension means is moved up and down alternately between the ground and the bottom of the shaft, and is efficiently ejected without performing a replacement kibble operation. As well as being able to work, there is no need to perform a replacement kibble operation on the scaffold or place an actual kibble on the scaffold, so safe work is ensured even for non-skilled workers. .
[0014]
The kibble suspending means in the shaft excavator is composed of two sets of kibble suspending means for suspending the first shear kibble and kibble suspending means for suspending the second shear kibble. A configuration in which the kibble passage holes for the first and second shear kibbles are drilled at positions symmetrical to the center, and the suspension points of the scaffold ropes are provided at two locations on both sides of each kibble passage hole, respectively. Can be taken.
[0015]
If the diameter of the shaft is increased from the current level, it will be necessary to use three or more sets of kibble suspension means and use three or more shear kibbles. Like the apparatus, the first and second shearing kibbles are suspended by two sets of kibbling suspension means and the projecting operation can be performed sufficiently to achieve the intended purpose. Ford is suspended at four points in a well-balanced manner, and the first and second shear kibbles can safely move up and down through the kibble passage holes between the suspension points.
[0016]
The kibble suspension means in the shaft excavator is provided with a rider that is interlocked with the lifting and lowering movement of a suspension fitting attached to the tip of the kibble rope, and a guide tube for inserting the scaffold rope is attached to each end of the rider. At the same time, the scaffolding rope can be provided with a locking member that locks the rider above the scaffolding.
[0017]
In this shaft excavator, the scaffold rope inserted through the guide tube Rider's Guided with both ends steady, and with the suspension bracket at the tip of the kibble rope locked against the rider, the shear kibble But Move up and down You Therefore, there is no mutual interference in which the kibble rope and the scaffold rope are intertwined, and the shear kibble can be moved up and down safely and quickly.
[0018]
The scaffold suspension means in the shaft excavator includes a hydraulic cylinder between each suspension point on the scaffold and each scaffold rope, and each hydraulic cylinder located on both sides of each kibble passage hole. It is possible to adopt a form in which one chamber and the other chamber are communicated with each other through a communication pipe and provided with tension adjusting means for correcting the offset load.
[0019]
In this shaft excavator, the height difference is set at each scaffolding point of Scaffold. But When the length of the scaffolding rope is adjusted by the hoisting machine, if an unbalanced load is generated and the extension stroke of the piston rod in each hydraulic cylinder fluctuates, it is removed from the high-pressure side cylinder chamber via the communication conduit. Oil flows into the low-pressure side cylinder chamber and operates so that the extension stroke of the piston rod becomes constant, so that the equal load is automatically adjusted, and the scaffold can always be held in a horizontal state.
[0020]
The rider in the shaft excavator can be detachably attached to the kibble rope and the scaffold rope, and the scaffold rope can be detachably attached to the scaffold.
[0021]
With this shaft excavator, when excavating a horizontal hole (tunnel) from the middle of the shaft, the scaffolding is removed and the scaffold is placed on the bottom of the shaft, and materials necessary for the horizontal hole excavation are carried in. In addition, kibble suspension means can be used when carrying out, but by using two sets of kibble suspension means arranged symmetrically with respect to the shaft axis of the shaft, large-sized or heavy materials and equipment can be obtained. It can be moved up and down easily and safely.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a shaft excavation device according to the present invention will be described in detail with reference to the accompanying drawings showing preferred embodiments thereof. In the shaft excavation device according to the illustrated embodiment, the vertical excavation device 2 can be moved up and down individually in an independent state. Using a slide kibble on the table, the slide is carried out by passing through a scaffold that has been suspended at 4 points.
[0023]
As shown in FIGS. 1 and 2, a shaft 1 is installed on the ground as a wellhead, and a scaffold head sheave 2 and a kibble head sheave 3 are installed on the upper level of the shaft 1, and in the middle level. Shear discharge means including a kibble overturning device (not shown) is installed.
[0024]
Scaffold ropes 4 and 5 and kibble ropes 6 and 7 are suspended on the head sheaves 2 and 3, respectively. The base ends of the kibble ropes 6 and 7 are wound around the kibble hoisting machines 10 and 11 each having a single body.
[0025]
That is, one side 4a of the scaffold rope 4 is wound on one drum 8A of the hoisting machine 8, the other side 4b of the scaffold rope 4 is wound on the other drum 8B of the hoisting machine 8, and one side 5a of the scaffold rope 5 is wound. The other side 5b of the scaffold rope 5 is wound on the other drum 9B of the hoisting machine 9, the kibble rope 6 is wound on the hoisting machine 10, and the kibble rope 7 is wound on the hoisting machine 11, respectively. ing.
[0026]
The head sheave 2 for the scaffold includes a head sheave 2A for suspending the scaffold rope 4a, a head sheave 2B for suspending the scaffold rope 4b, a head sheave 2C for suspending the scaffold rope 5a, and the scaffold rope 5b. The head sheaves 2D to be suspended are arranged in this order.
[0027]
Further, in the head sheave 3 for kibble, the head sheave 3A for suspending the kibble rope 6 is arranged in the middle of the head sheave 2A and the head sheave 2B, and the head sheave 3B for suspending the kibble rope 7 is arranged in the middle of the head sheave 2C and the head sheave 2D, respectively. Yes.
[0028]
Next, in the shaft 12, as shown in FIG. 3, the scaffold ropes 4a, 4b, 5a , 5b The scaffold 13 suspended in a multi-point suspended state, the first shearing kibble 15 suspended by the kibble rope 6 via the suspension fitting 14, and the second suspended by the kibble rope 7 via the suspension fitting 14. The shear kibble 16 is arranged so as to be movable up and down.
[0029]
The scaffold 13 is composed of a three-stage deck composed of an upper deck section 13A, a middle deck section 13B, and a lower deck section 13C. A protective fence 18 for safety is stretched around the outside of the deck portion.
[0030]
Further, as shown in FIG. 4, the scaffold 13 includes a first passage hole 19 that allows passage of the first shearing kibble 15 and a second passage hole 20 that allows passage of the second shearing kibble 16. The decks 13A, 13B, and 13C are drilled in communication with respect to the alignment positions.
[0031]
The first and second passage holes 19 and 20 are arranged at symmetrical positions with respect to the shaft center line of the shaft 12 (also the shaft center line of the scaffold 13), and the scaffold rope 4 ( 4a, 4b) point a and b are suspensions of the scaffold ropes 5 (5a and 5b) on both sides of the first passage hole 19; point c and d are respectively set on both sides of the second passage hole 20, and each passage hole and each suspension point are arranged in a line along a horizontal plane perpendicular to the axial line.
[0032]
In addition, if three shearing kibbles are used, the passage hole is provided with one location on the axial center line and one each on both sides thereof, and the passage holes when four shearing kibbles are used are Two places are arranged on both sides of the wire, and in each case, each kibble is arranged in a line along a horizontal plane perpendicular to the axial center line, and the suspension point by the scaffold rope is attached to each passing hole. Set one on each side.
[0033]
In addition to passing the first shearing kibble 15, the first passage hole 19 hangs an electric excavator 21 used as excavation means or the like and a concrete kibble 22 used for lining work by a kibble rope 6 via a suspension fitting 14. Since it is hung and passed, it has a shape that allows the electric shovel 21 having a diameter larger than that of the first shear kibble 15 to pass.
[0034]
In addition to allowing the second shear hole 16 to pass through, the second passage hole 20 allows a shaft jumbo 23 used as a drilling means to be suspended and passed by the kibble rope 7 via the suspension fitting 14. Since the second shear kibble 16 can be folded to a smaller diameter, the second shear kibble 16 can be passed through.
[0035]
In addition, each of the deck portions 13A, 13B, and 13C is provided with a cut-out portion, and the wind pipe 24, the water supply pipe, and other pipes are installed in a vertically connected manner, and the upper deck portion 13A is provided with a human elevator (suspended). (Not shown including the means) is provided, and an emergency stop pedestal 26 for the human elevator is provided immediately below the accommodation hole 25 of the middle deck portion 13.
[0036]
In addition, on the lower deck portion 13C, a mounting table 27 on which the concrete kibble 22 is installed at the time of lining work is mounted so as to be openable and closable via a plurality of jumping metal fittings 28, and on the outer peripheral side. A plurality of grippers 29 formed of jacks extending and contracting in the horizontal direction are provided so that the scaffold 13 can be locked and held on the inner wall surface of the shaft 12.
[0037]
As shown in FIGS. 5 and 6, the scaffold 13 is suspended by attaching the connecting bracket 30 on the upper deck portion 13A and attaching the rope socket 31 to the tip of the scaffold ropes 4a, 4b, 5a, 5b. The metal fitting 30 and the rope socket 31 are connected with tension adjusting means using a hydraulic cylinder 32 interposed.
[0038]
The tension adjusting means automatically adjusts so that an equal load is applied to each of the scaffold ropes 4a, 4b, 5a, 5b, and corrects the eccentric load of the scaffold 13; A hydraulic cylinder 32 is mounted therebetween, and the cylinder chambers of the adjacent hydraulic cylinders 32 are connected to each other through flexible communication pipes 33 and 34 such as hoses.
[0039]
That is, the hydraulic cylinder 32A and the hydraulic cylinder 32B connected to the scaffold rope 4 (4a, 4b) have one chamber and the other chamber communicated with each other via the communication conduit 33 (33a, 33b). In the hydraulic cylinder 32C and the hydraulic cylinder 32D connected to the Ford rope 5 (5a, 5b), one chambers and the other chambers are communicated with each other via a communication conduit 34 (34a, 34b).
[0040]
As shown in FIG. 5 (a), the scaffold 13 is normally maintained at a constant length as shown in FIG. The extension stroke of the piston rod at 32 (32A, 32B, 32C, 32D) Same Therefore, the entire scaffold 13 including the upper deck portion 13A is held in a horizontal state.
[0041]
However, the Scaffold hoisting machines 8 and 8 are different from the Scaffold rope 4 as shown in FIG. 5 becomes longer, the hydraulic cylinders 32A and 32C contract and the hydraulic cylinders 32B and 32D expand, and the scaffold 13 may be inclined.
[0042]
At that time, if the scaffold rope 5 (5a, 5b) is wound up by driving the scaffold hoist 9 and the length is made equal to the scaffold rope 4 (4a, 4b), the hydraulic cylinder 32A Between the hydraulic cylinder 32B and between the hydraulic cylinder 32C and the hydraulic cylinder 32D, the oil flows from the high pressure side cylinder chamber to the low pressure side cylinder chamber via the communication conduit 34 (34a, 34b), and the piston rod extends. Stroke Same The automatic adjustment is performed so that the scaffold 13 is restored to the horizontal state.
[0043]
Also, the scaffold ropes 4 (4a, 4b) or 5 (5a, 5b) wound around the same multi-drum scaffold hoist 8 or 9 are usually equal and constant as shown in FIG. 6 (a). However, if the load is unbalanced and the extension stroke of the hydraulic cylinder 32 is displaced as shown in FIG. 6B, the hoisting machine 8 (or 9) On the other hand, when the drum 8A or 8B (9A or 9B) is wound up, it can be restored to an equilibrium state by the hydraulic cylinder 32 and the communication conduit 33 (or 34) as tension adjusting means.
[0044]
That is, FIG. b ) Occurs in the scaffold rope 4 (4a, 4b), the one drum 8B of the scaffold hoist 8 is wound up, and the length of the scaffold rope 4b is adjusted to the scaffold. When it is made to coincide with the rope 4a and is generated on the scaffold rope 5 (5a, 5b), the one drum 9B of the scaffold lifting machine 9 is wound up, and the length of the scaffold rope 5b is matched with the scaffold rope 5a. Then, it can be automatically restored to the equilibrium state by the tension adjusting means.
[0045]
Further, unlike the conventional technique for performing the replacement kibble operation, the replacement kibble is not placed on the scaffold and does not move horizontally, so there is no fear that an excessive unbalanced load is applied to the scaffold 13. When a slight unbalanced load is applied, the automatic adjustment is immediately made to a uniform load by the hydraulic cylinder 32 and the communication pipes 33 and 34 as tension adjusting means, and the scaffold 13 is always kept in a horizontal state. Can do.
[0046]
The hydraulic cylinder 32 is connected to the coupling metal 30 on the cylinder body side via a detachable fixing means (for example, a bolt and a nut), and the piston rod side is detachable from the rope socket 31. Are connected via a fixing means (for example, a bolt and a nut), and the connection fitting 30 and the rope socket 31 are detachably and pivotably mounted.
[0047]
The first shearing kibble 15 is suspended from the kibble rope 6 wound around the kibble hoisting machine 10 via a hanging metal fitting 14, and the kibble rope 6 is disposed at an intermediate position between the scaffold ropes 4a and 4b. It moves up and down between the bottom portion 35 of the shaft 12 and the ground shaft 1 through the first passage hole 19 between the suspension points a and b provided on the upper deck portion 13A of the scaffold 13.
[0048]
The second shearing kibble 16 is suspended from the kibble rope 7 wound around the kibble hoisting machine 11 via a hanging metal fitting 14, and the kibble rope 7 is disposed at an intermediate position between the scaffold ropes 5a and 5b. It moves up and down between the bottom portion 35 of the shaft 12 and the ground shaft 1 through the second passage hole 20 between the suspension points c and d provided on the upper deck portion 13A of the scaffold 13.
[0049]
Each of the kibble ropes 6 and 7 is provided with a rider 36 (36A, 36B) for steadying, and a rider receiver (not shown) for the rider 36 is provided in the middle stage of the shaft 1 and the rider 36 has a kibble rope 6 in the center. 7 is provided with a support member 38 disposed horizontally with a guide tube 37 for the guide 7, and guide tubes 39 for the scaffold ropes 4, 5 disposed vertically on both ends of the support member 38.
[0050]
The rider 36 moves up and down in conjunction with the winding or unwinding of the kibble ropes 6 and 7 by the kibble hoists 10 and 11. You In that case, the scaffold ropes 4 and 5 inserted through the guide tube 39 are used as guides, and when they are moved up, they are locked to the rider receiver provided on the shaft 1 and when they are moved down, the kibble rope 6 , 7 is locked above the scaffold 13 by a locking member 40.
[0051]
The rider 36 is configured so that at least a part or the whole of the guide cylinders 37 and 39 can be divided into two parts in a vertically divided state as in the case of a known rider. The kibble ropes 6 and 7 and the scaffolding ropes 4 and 5 can be attached and detached.
[0052]
When the shaft excavation apparatus having the above configuration is used, as shown in FIGS. 7 to 9, the shaft 12 can be constructed by drilling and excavation work, projecting work, and lining work. Extends the gripper 29 provided on the lower deck portion 13 </ b> C, and holds the scaffold 13 in a predetermined position above the bottom bottom portion 35.
[0053]
As shown in FIGS. 7 (a), 7 (b) and 8, the sliding operation is a self-propelled type in which the first shearing kibble 15 which is an empty kibble is suspended from the bottom 35 and an excavator is installed at the tip of the boom. The first shearing kibble 15 is piled up by a shearing machine such as the electric excavator 21 of the above, and the second shearing kibble 16 which is an actual kibble in the meantime reciprocates between the ground and discharges the shearing. Wait on Scaffold 13.
[0054]
When the first shearing kibble 15 is completely stacked, the first shearing kibble 15 is lifted and the second shearing kibble 16 is suspended, and the second shearing kibble 16 is stacked and the first shearing kibble 15 is sheared. The discharging operation is performed in parallel, and the same projecting operation is repeated thereafter.
[0055]
Further, as shown in FIG. 9 (a), the drilling and excavation work performed prior to the projecting work is performed by hanging the shaft jumbo 23 from the bottom hole 35 via the second passage hole 20 of the scaffold 13, and A series of excavation operations including a blasting operation are performed. The shear kibbles 15 and 16 and the electric excavator 21 are retracted from the bottom portion 35 in the meantime.
[0056]
Further, as shown in FIG. 9B, the lining work performed after the sliding work is performed by installing a mounting table 27 on the lower deck portion 13C of the scaffold 13 and a feeding hose 43 on the mounting table 27. While the connected hopper 42 is placed, the concrete kibble 22 is suspended using the kibble rope 6, and the concrete is supplied from the concrete kibble 22 to the hopper 42.
[0057]
In the lining work, the movable mold 45 is installed on the lower outer periphery of the already constructed lining concrete 44, and the tip of the feeding hose 43 is engaged with the tip of the boom 41 of the electric excavator 21 installed in the center of the bottom portion 21. The concrete is placed while turning the boom 41 in a state in which the boom 41 is turned in a state where the tip of the feeding hose 43 is directed to the splicing member.
[0058]
Next, FIG. 10 shows materials and equipment necessary for excavating the horizontal hole 46 when the horizontal shaft (tunnel) 46 is constructed in a state orthogonal to the vertical shaft 12 excavated to a predetermined depth, or the constructed horizontal hole 46. The embodiment uses the kibble ropes 6 and 7 when carrying in and out necessary materials and equipment.
[0059]
First, the rider 36 is removed from the kibble ropes 6 and 7 and the scaffold ropes 4 and 5, and the scaffold ropes 4 and 5 and the scaffold 13 are separated between the rope socket 31 and the hydraulic cylinder 32, and the scaffold 13 has already been excavated. It mounts on the bottom 35 of the vertical shaft 12.
[0060]
In addition, a traveling rail 47 is laid between the shaft 12 and the horizontal hole 46, and a transport carriage 48 is movably installed on the traveling rail 47. A suspension rope 49 is attached to the hanging bracket 14 of the kibble ropes 6 and 7. The equipment 50 can be suspended so that it can be lifted and lowered, and the equipment 50 suspended from the ground is carried into the horizontal hole 46 by the transport carriage 48 or from the lateral hole 46 by the transport carriage 48. The material and equipment 50 carried out can be lifted on the ground.
[0061]
In the suspension of the equipment 50, since two sets of suspension means (kibble hoisting machine and kibble rope) arranged symmetrically with respect to the shaft center of the shaft 12 are used, the equipment is large or heavy. The class 50 can be moved up and down easily and safely.
[0062]
In order to move the suspended materials and equipment 50 up and down more safely, a person elevator that is moved up and down between the ground and the scaffold 13 by a separate suspension means is used. While moving up and down at the same speed as the kibble ropes 6 and 7, it is also possible for an operator who is on a human elevator to monitor.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a hoisting facility installed on the ground, which is an embodiment to which a shaft excavation device of the present invention is applied.
FIG. 2 is a schematic plan view of the hoisting equipment installed on the ground.
FIG. 3 is also a schematic plan view of a shear kibble and a scaffold suspended in a shaft.
4 shows a schematic plan view of each deck section of the scaffold in FIG. 3. FIG.
FIG. 5 is an explanatory view of a tension adjusting device equipped on a scaffold rope.
FIG. 6 is an explanatory diagram of a tension adjusting device equipped on a scaffold rope.
FIG. 7 is a front view for explaining a sliding operation.
FIG. 8 is a plan view for explaining a sliding operation.
9A is a front view for explaining excavation work including drilling and blasting, and FIG. 9B is a front view for explaining lining work.
FIG. 10 is a front view for explaining the carrying-in and carrying-out operations of materials and equipment in a horizontal hole (tunnel) excavation work.
[Explanation of symbols]
1 Vertical shaft
2 Scaffold head sheep
3 Kibble head sheep
4,5 Scaffold rope
6,7 Kibble rope
8,9 Scaffold hoist
10,11 Kibble hoisting machine
12 shaft
13 Scaffold
13A Upper deck section
13B Middle deck section
13C Lower deck
14 Hanging Bracket
15 1st Z Riquibble
16 Second shear kibble
17 Connecting pillars
18 Protective fence
19 First passage hole
20 Second passage hole
21 Electric excavator
22 Concrete Kibble
23 Shaft jumbo
24 Wind pipe
25 (Elevator for human use)
26 cradle
27 mounting table
28 Lifting bracket
29 Gripper
30 Connecting bracket
31 Rope socket
32 Hydraulic cylinder
33, 34 communication pipeline
35 Downhole
36 riders
37 Guide tube (of kibble rope)
38 Support members
39 Guide tube (of Scaffold rope)
40 Locking member
41 boom
42 Hopper
43 Feed hose
44 lining concrete
45 Moving formwork
46 Side hole (tunnel)
47 Traveling rail
48 Carriage cart
49 Hanging rope
50 Equipment

Claims (5)

A scaffold of kibble passing hole is bored,
In order to be movable up and down in the vertical shaft by suspending the scaffold, and the scaffold suspension means the hanging point has a plurality of scaffold rope respectively provided on both sides of the kibble passage hole,
A kibble suspension means that suspends the shear kibble with a kibble rope and can move up and down between the ground and the bottom of the pit,
The scaffold suspension means includes a hydraulic cylinder between each suspension point on the scaffold and each scaffold rope, and one chamber and the other of each hydraulic cylinder located on both sides of the kibble passage hole. A shaft excavator characterized in that the chambers are connected with each other through a communication pipe and provided with tension adjusting means for correcting the offset load . And hanging point of the scaffold rope and the kibble passing holes, shaft excavation apparatus as claimed in claim 1, which is arranged in series with the horizontal plane perpendicular to the center of the pit. The kibble suspension means has a first kibble rope suspending the first shear kibble and a second kibble rope suspending the second shear kibble,
The scaffold, together with the kibble passage hole for said first and second shear kibble at the center and symmetrical position are two bored, by setting kicked the scaffold rope on both sides two places of each kibble apertures The shaft excavating device according to claim 1 or 2 , wherein the shaft is suspended at four points. The kibble suspension means is provided with a rider that interlocks with the lifting and lowering movement of a suspension fitting attached to the tip of the kibble rope, and a guide tube for inserting the scaffold rope is attached to both ends of the rider, and the scaffold rope The shaft excavation device according to any one of claims 1 to 3, further comprising a locking member for locking the rider above the scaffold. The shaft excavator according to claim 4 , wherein the rider is detachably attached to the kibble rope and the scaffold rope, and the scaffold rope is detachably attached to the scaffold.

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