JPH0874492A - Shaft wall breaker in start shaft - Google Patents

Abstract

PURPOSE: To install a start shaft wall breaker in a small gap between a start shaft wall and the head part of a shield excavator so as to be able to mechanically break the shaft wall. CONSTITUTION: Lower support mechanism 27 and upper support mechanism 31 respectively with support plates 26, 30 movable in the horizontal direction are fitted to one side in the thickness direction of a main frame 20, and a turning frame 33 is fitted to the other side in the thickness direction of the main frame 20 in such a way as to be turnable around a horizontal shaft. A breaking working machine 45 constituted of a boom 37, an arm 39 and a breaker 44 is fitted to the turning frame 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher for crushing a pit wall of a starting shaft during tunnel excavation by a shield excavating machine.

[0002]

2. Description of the Related Art When excavating a tunnel with a shield excavating machine, first, a starting shaft is constructed from the ground, and the shield excavating machine is integrally or dividedly transported from a factory or the like and is loaded into the starting shaft to start the shaft. Assemble and install on the starting stand inside.

In this state, as shown in FIG. 1, the shaft wall 4 of the starting shaft 3 facing the front part 2 of the shield excavating machine 1 is crushed, and the shield excavating machine 1 is pushed into the ground from the crushed portion to sequentially I'm excavating.

[0004]

As described above, in order to crush the shaft wall 4 of the starting shaft 3, a general machine such as a power shovel 6 having a breaker 5 as shown in FIG. 1 is used. , The starting shaft 3 is generally set to the minimum size in order to reduce the construction cost, and therefore the gap L between the mine wall 4 and the front part 2 of the cider excavating machine 1 becomes smaller, which is smaller than the gap L. It may not be possible to load a general machine as described above.

Even if a general machine can be used, the upper portion 4a of the mine wall 4 which is separated from the bottom portion can be crushed relatively easily, but it is very difficult to crush the lower portion 4b near the bottom portion. Is.

That is, since the breaker 5 is swung up and down with respect to the vehicle body 7 in a general machine, it is easy to move the breaker 5 upward, but it is not possible to move it downward. Since it is difficult, it is difficult to crush the lower portion 4b.

Due to such circumstances, the above-mentioned gap L is conventionally used.
It is common to assemble a scaffold on the part and the operator crushes the mine wall using a hand-held breaker on the scaffold.In this way, the crushing work efficiency is poor if it is done manually by the operator. The whole tunnel excavation work takes a long period of time, and a large amount of dust is generated, resulting in a very bad working environment, which is a pain for workers.

[0008] Therefore, an object of the present invention is to provide a shaft crusher for a starting shaft, which can solve the above-mentioned problems.

[0009]

A swivel frame 33 is attached to one side surface of a main frame 20 so as to swivel around a horizontal axis, and a swivel work machine 45 equipped with a shredding device is attached to the swivel frame 33. Of the starting shaft equipped with a supporting mechanism movably mounted in a folding attitude approaching to the above and a projecting attitude protruding from the revolving frame 33, and a supporting plate provided with a horizontally movable supporting plate on the other side surface side of the main frame 20. Mine wall crusher.

[0010]

[Operation] By moving the support plate to the main frame 20 side while the crushing machine 45 is in the folded posture, the dimensions of the main frame 20 in one side and the other side are reduced, and the pit wall 11 of the starting shaft 10 is reduced. Even if the gap between the head and the head 16 of the shield excavating machine 14 is small, it can be installed in that gap. The crushing machine 4 with the support plate of the support mechanism protruding and in contact with the head 16
The mine wall 11 can be crushed by turning the turning frame 33 with 5 as the projecting posture, and the crushing reaction force at that time can be supported by the head 16 of the shield excavating machine 14.

[0011]

[Example] As shown in Figs. 2 and 3, the starting shaft 10
Has a rectangular cross section and is vertically long, and its mine wall 11 and bottom wall 12
Is concrete, the lower pit wall 11a near the bottom wall 12 in the tunnel excavation direction portion of the pit wall 11 is thinner than the upper pit wall 11b, and the protruding portion is at the boundary portion between the lower pit wall 11a and the upper pit wall 11b. 13 is integrally provided.

The shield excavating machine 14 is assembled and installed on a starting pedestal (rail) 15 in the starting shaft 10, and its head 16 faces the lower pit wall 11a of the pit wall 11 with a gap between the two. There is L ₂ . This gap L ₂ is actually the head 16
And the protrusion 13.

The crusher of the present invention is provided with a vertically long main frame 20 having a wide width and a thin thickness, and a pair of cross members 21 are directed to both sides in the width direction at positions separated from each other in the thickness direction in the lower portion of the main frame 20. And a fixed member 22a of a leg 22 which is vertically expandable and retractable by a cylinder (not shown) and the like, and a ground plate 23 is attached to a movable side 22b of the leg 22. Are attached to form the lower outrigger 24.

A telescopic mechanism 25 for telescopically extending by a cylinder or the like (not shown) on both sides of the main frame 20 in the width direction toward the lower side.
Fixed sides 25a of the main frame 20 are attached in the horizontal direction, and movable sides 25b of the fixed sides 25a are extendable in the thickness direction of the main frame 20 and directed to one side in the thickness direction. 26 are attached to face the head 16 to form a lower support mechanism 27 for supporting the main frame 20 so as not to fall.

A pair of horizontal members 28 are attached to the upper and lower positions of the main frame 20 vertically above and below each other by a cylinder or the like (not shown) in the width direction, and each horizontal member 28 is not shown. The fixed sides 29a of the expansion and contraction mechanism 29 that expands and contracts with a cylinder or the like are attached in the horizontal direction, and the movable sides 29b thereof are expandable and contractible in the thickness direction of the main frame 20 and are directed to one side in the thickness direction. A support plate 30 is attached to the movable side 29b so as to face the head 16, and constitutes an upper support mechanism 31 for supporting the main frame 20 so as not to fall.

A swivel frame 3 is provided at an upper and lower intermediate portion on the other side in the thickness direction of the main frame 20 through a swivel mechanism 32.
3 is rotatably mounted around a horizontal axis, and the slewing mechanism 32 is such that a movable ring body 35 is rotatably attached to a fixed ring body 34 via a slewing motor 36, a rack (not shown) and a ring gear.

A boom 37 is attached to the revolving frame 33 by a boom cylinder 38 so as to be swingable in a direction of approaching and separating from the revolving frame 33. An arm 39 is attached to the tip of the boom 37 by an arm cylinder 40 and the boom 37. And a bracket 41 is attached to the tip of an arm 39 of the arm 39 so as to be swingable in the same direction as the arm 39 by a cylinder 42 and a link 43. A breaker 44 is attached to form a crushing work machine 45 that can be freely moved between a folded position and a projected position.

Turning center 3 of the turning frame 33
A counterweight 46 is attached to the opposite side of the breaker 44 with the boundary 3a, whereby the turning frame 33 is provided.
Is designed to turn smoothly.

On the projecting portion 13 of the starting shaft 10, a pedestal 4 is mounted.
7 is temporarily installed, and a hydraulic unit 48 is installed on the pedestal 47. The hydraulic unit 48 is located in the upper space above the shield excavating machine 14 in the inner space of the starting shaft 10, and the hydraulic unit 48 and the cylinders and the like are provided. The hydraulic hoses 49 are respectively connected between the hydraulic actuators, and the control valve provided from the radio transmitter 50 is used to switch the operation valve provided in the hydraulic unit 48 to supply the pressure oil to each hydraulic actuator.

Brackets 51 are attached to both sides of the main frame 20 in the upper width direction.
A chain block and one end of a length adjustable wire 52 such as a chain are connected to the other end, and the other end of the length 52 is connected to a bracket 53 attached to the head 16 so as to move the main frame 20 to the head. The portion 16 side can be pulled and supported.

Next, the operation of crushing the pit wall 11 of the starting shaft 10 will be described. The shield excavating machine 14 is assembled / installed on the starting stand 15 in the starting shaft 10 to install the head 16 and the pit wall 1.
A gap L ₂ is formed between the first and _second portions.

Boom 37, arm 39, bracket 41
Is swayed to the side of the revolving frame 33 to bring the crushing work machine 45 into a folded posture, and the ground plate 23 and the support plates 26, 30 are contracted.

In this state, the main frame 20 is hoisted from the ground by a crane or the like and hoisted from the gap L ₂ to make the bottom wall 1
Temporarily place it on 2. At this time, since the main frame 20 has a small thickness and the crushing machine 45 is folded, the size of the entire crusher in the thickness direction of the main frame 20 is small, and even if the above-mentioned gap L ₂ is small, It can be hung and installed between the head 16 and the pit wall 11.

A pedestal 47 is provided, a hydraulic unit 48 is installed on the pedestal 47, a power source is connected, and a hydraulic hose 49 is connected so that the crusher can be operated.

The grounding plate 23 of the lower outrigger 24 is expanded and contracted while the temporarily placed crusher is lifted,
The support plates 30 and 26 of the lower support mechanisms 31 and 27 are expanded and contracted to extend the center 14a of the shield excavating machine 14 and the swing frame 33.
The crusher is installed so that the turning centers 33a of the two are coincident with each other, and the rope 52 is connected to the bracket 51 and the bracket 53 so that the length thereof is shortened and the main frame 20 is pulled toward the head 16 side to support the upper and lower supporting mechanisms. 31 and 27 support plates 3
The main frame 20 is supported by 0 and 26 so as not to fall.

Boom 37, arm 39, bracket 41
While oscillating, the breaker 44 is actuated while projecting, and the lower part 11a of the mine wall 11 is struck and crushed by the breaker 44.

Then, the turning motor 36 is driven to slightly turn the turning frame 33, and the other portion is hit by the breaker 44 to be crushed.

Thereafter, similarly, the lower part 11a of the mine wall 11 is 3
Crush in the range of 60 degrees to allow the shield excavating machine 14 to pass. At this time, since the center 14a of the shield excavating machine 14 and the revolving center 33a of the revolving frame 33 are coincident with each other, the lower part 11a of the pit wall 11 is made the same as the shield excavating machine 14 by revolving and crushing the revolving frame 33. Can be crushed into cores.

Next, another embodiment will be described. As shown in FIG. 4, the arm 39 is attached to the fixed arm 39a and the movable arm 39
The cylinder b can be expanded and contracted.

As shown in FIG. 5, the main frame 20 is connected to the fixed frame 20a and the movable frame 20b is extendably and contractably connected.

According to the above, since the operable range of the breaker 44 is widened, the size of the crushing portion of the mine wall 11 is large, so that the crushing can be performed in accordance with the size of the shield excavating machine. The performance is improved and the whole can be made compact when hanging.

[0032]

EFFECTS OF THE INVENTION By moving the crushing machine 45 to the folding posture and moving the support plate to the main frame 20 side, the dimension of the main frame 20 in one side and the other side direction is reduced, and the standing wall 11 of the starting shaft 10 is reduced. And the head 16 of the shield excavator 14
Even if the gap between and is small, it can be installed in that gap. The mine wall 11 can be crushed by turning the turning frame 33 with the crushing work machine 45 in the projecting posture while the supporting plate of the support mechanism is protruding and in contact with the head 16, and the crushing reaction force at that time can be crushed. It can be supported by the head 16. Therefore, the mine wall 11 can be mechanically crushed by providing a small gap between the head 16 of the shield excavating machine 14 and the mine wall 11.

According to the second aspect, since the installation height of the main frame 20 can be adjusted by moving the ground plate 23 of the lower outrigger 24 up and down, the turning center of the turning frame 33 and the center of the shield excavating machine 14 can be adjusted. Can be matched.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a conventional mine wall crushing work.

FIG. 2 is a side view of the entire crusher showing the first embodiment of the present invention.

FIG. 3 is a front view of the entire crusher showing the first embodiment of the present invention.

FIG. 4 is a side view showing a second embodiment of the crushing work machine.

FIG. 5 is a front view showing a second embodiment of the main frame.

[Explanation of symbols]

 10 ... Start shaft 11 ... Well wall 14 ... Shield excavation machine 16 ... Head 20 ... Main frame 23 ... Ground plate 24 ... Lower outrigger 26 ... Support plate 27 ... Lower support mechanism 30 ... Support plate 31 ... Upper support mechanism 32 ... Revolving Mechanism 33 ... Revolving frame 37 ... Boom 39 ... Arm 41 ... Bracket 44 ... Breaker.

Claims (2)

[Claims] 1. A slewing frame 33 is attached to one side surface of a main frame 20 so as to be rotatable about a horizontal axis, and a crushing work machine 45 equipped with a crushing device is attached to the slewing frame 33 so as to fold it close to the slewing frame 33. Posture and swivel frame 3
3 is movably mounted in a projecting posture projecting from No. 3, and a supporting mechanism having a horizontally movable supporting plate is mounted on the other side surface of the main frame 20 to crush the shaft wall of the starting shaft. Machine. 2. A ground plate 23 is provided under the main frame 20.
The shaft crusher for a starting shaft according to claim 1, further comprising a lower outrigger 24 which is movable up and down.