JP2019206848A - Box body suspension device - Google Patents

Abstract

To provide a device for suspending a concrete box body, when the concrete box body being suspended, capable of exchanging a load of the box to a ground by a plurality of outriggers.SOLUTION: A device for suspending a concrete box body according to this invention includes: a frame which is erected upwardly from both side walls of the tail portion and is configured with a frame-like body; a suspension mechanism that can lift and suspend the box body and can move in the front-rear direction along the girder of the frame; and a plurality of outriggers projecting laterally of the tail portion connected to the frame, and the device is configured so that at least a part of load of the box body acting on the tail portion via the frame can be exchanged to the plurality of outriggers to be transferred to the ground by extending the plurality of outriggers downward to the ground.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a box hoisting device, and more particularly to a box hoisting device for hanging a box on a ground in a tail portion of an open pit machine in an open cut propulsion method.

The open-cut promotion method is one of the underground burying methods for concrete boxes, and for example, the open pit method (registered trademark) is known.
The open-cut propulsion method is an open pit machine in which a front part for excavation with a plurality of cutting edges provided on the left and right side walls and a tail part for box installation with open top and bottom and rear are connected by a plurality of shield jacks. , While excavating the ground, repeat the penetration of the cutting edge into the ground and the expansion and contraction of the shield jack to advance using the peripheral surface frictional force of the front part. A concrete box is suspended from above in the space created in the tail by the advance of the open pit machine, and the box is laid backward.
In addition to this, there are a plurality of variations in the excavation propulsion method, such as a method of moving forward by taking a reaction force on the box placed behind instead of the peripheral surface frictional force of the front part.
Patent Documents 1 and 2 disclose a configuration in which a portal crane for hanging a box is installed on a tail portion of an open pit machine.
Patent Document 3 discloses a configuration in which a lifter facility including a mast, a cradle, and a hydraulic jack is installed in a tail portion of an open pit machine.

JP-A-10-352434 JP-A-11-272491 Japanese Patent No. 6276440

The prior art has the following drawbacks.
<1> Since the tail part of an open pit machine consists only of a side wall and does not have a bottom surface, the load of the box concentrates on the side wall when the concrete box is suspended. For this reason, there exists a possibility that a side wall may be distorted or the grounding part of a side wall may be buried in the ground.
<2> When there is an obstacle such as a bridge in the sky in the direction of travel of the open pit machine, the crane part interferes with the obstacle, so it cannot move forward unless the crane part is disassembled.
<3> If the box is lifted while the open pit machine is tilted, a load may be applied to the members of the crane section, which may cause damage. Moreover, there is a possibility that the hung box cannot be hung on the ground due to interference with the frame.

  An object of the present invention is to provide a box suspension device that can solve these problems of the prior art.

The box suspension device of the present invention for solving the above-described problems is connected to a frame standing from both side walls of the tail portion, a suspension mechanism movable back and forth along the frame, and the frame. And a plurality of outriggers projecting to the side of the tail portion.
According to this configuration, at least a part of the load of the box can be transferred to the ground by the outrigger, and the load can be prevented from concentrating on the side wall of the open pit machine.

In the box suspension device of the present invention, the suspension mechanism may include a slide rail, a slide base, a slide roller, and a lifting means.
According to this structure, it can have both the conveyance function to the front-back direction of a box, and the position adjustment function of the left-right direction.

The box suspension device of the present invention may be capable of individually adjusting the height of each column by the inclination correcting means.
According to this structure, even if the open pit machine is inclined, the upper suspension mechanism can be kept horizontal. Moreover, even if the ground under the outriggers subsides, the load can be prevented from being transmitted to the tail portion by shortening the inclination correcting means by the amount of subsidence.

The box suspension device of the present invention may support the upper frame by the lower frame so as to be movable up and down.
According to this configuration, the upper frame can be lowered to advance under the obstacle.

Since the box suspension apparatus of the present invention has the above configuration, it has at least one of the following effects.
<1> Since the load can be transferred to the ground by the outrigger when the concrete box is suspended, distortion of the side wall of the tail portion and burial in the ground can be prevented.
<2> Even if there is an obstacle in front of the direction of travel, the upper frame can be lowered to dive under the obstacle and move forward.
<3> Even if the open pit machine is inclined, the suspension mechanism can be kept horizontal by the inclination correcting means, so that it is possible to prevent the box from interfering with the frame and damage to the members.

Explanatory drawing of the box suspension apparatus concerning this invention. Explanatory drawing of the box suspension apparatus concerning this invention. Explanatory drawing of the box suspension apparatus concerning this invention. Explanatory drawing of the usage method of the box suspension apparatus which concerns on this invention. Explanatory drawing of the usage method of the box suspension apparatus which concerns on this invention.

Hereinafter, the box suspension device of the present invention will be described in detail with reference to the drawings.
In this specification and the like, the terms “vertical”, “front / rear”, “left / right”, “width”, etc., indicate the respective directions with the ground excavation direction in the front direction when the box suspension device is installed on the open pit machine. means.
In addition, in this specification and the like, “hanging (hanging)” includes both lifting and hanging.

[Box hanging device]
<1> Overall configuration (FIGS. 1 and 2).
The box suspension device 1 of the present invention is a device for hanging a box B such as a box culvert on the ground in the tail portion A2 of the open pit machine A in the open cut propulsion method.
The box suspension device 1 includes an upper frame 10 and a lower frame 20 that are combined to form a frame-like body, and a suspension mechanism 30 that can be moved forward and backward on the upper frame 10 and can suspend the box B. And a plurality of outriggers 40 projecting laterally from the lower frame 20.
The box suspension device 1 is installed on top of the open pit machine A.

<2> Upper frame (FIGS. 2 and 3).
The upper frame 10 is a component that constitutes a frame body that can be vertically expanded and contracted in combination with the lower frame 20.
In this example, the upper frame 10 includes two beam members 11 extending in the longitudinal direction of the open pit machine A, two beam members 12 connecting the front and rear of the two beam members 11, and the beam member 11. And a total of four upper struts 13 each supporting two.
Shaped steel is used for the beam member 11, the beam member 12, and the upper column 13.
The rear end portions of the two girder members 11 project rearward from the tail portion A2 of the open pit machine A.

<3> Lower frame (FIGS. 2 and 3).
The lower frame 20 is a component that constitutes a frame body that can be vertically expanded and contracted integrally with the upper frame 10.
In this example, the lower frame 20 includes two pedestals 21 arranged substantially parallel to the longitudinal direction of the open pit machine A, and two each of the two erected upright from the front and rear of the two pedestals 21. Lower support column 22, four lift-up devices 23 arranged in the lower support column 22 and capable of moving the upper support column 13 up and down, and four inclination correcting devices 24 interposed between the base 21 and the lower support column 22. .
Shaped steel is used for the pedestal 21 and the two pedestals 21 are attached to the upper portions of the side walls of the tail portion A2 of the open pit machine A.

<3.1> Lower support column.
The lower column 22 is a connection part with the upper frame 10.
In this example, a rectangular column having a diameter larger than that of the upper column 13 is adopted as the lower column 22, and an opening for accommodating the upper column 13 is formed above the lower column 22.
A support column 41 of an outrigger 40 described later is firmly connected to the side surface of the lower column 22.
A lift-up means 23 is built in each lower column 22.
The lower end portion of each lower column 22 is connected to the inclination correcting means 24.

<3.2> Lift-up means.
The lift-up means 23 is a component for supporting the upper frame 10 to be movable up and down with respect to the lower frame 20.
In this example, a hydraulic cylinder built in the opening of the lower support column 22 is employed as the lift-up means 23. In addition, other known lifting devices may be employed.

<3.3> Inclination correcting means.
The inclination correcting means 24 is a component for keeping the suspension mechanism 30 horizontal when the open pit machine A is inclined.
In this example, a screw jack attached to the lower end portion of the lower column 22 is employed as the inclination correcting means 24. In addition, other known adjusting devices may be employed.
By rotating the screw jack and individually adjusting the heights of the four tilt correcting means 24, the upper suspension mechanism 30 can be leveled even if the open pit machine A is tilted in any direction XY. Can be maintained (FIG. 5).

<4> Suspension mechanism (FIGS. 2 and 3).
The hanging mechanism 30 is a component for conveying the box B and hanging it on the ground in the tail portion A2.
In this example, the suspension mechanism 30 has two slide bases 34 that can move in the longitudinal direction of the open pit machine A along the beam 11 of the upper frame 10, and both ends connected on the two slide bases 34. A slide rail 33 laid horizontally between the beams 11, a slide roller 32 movable in the width direction of the open pit machine A along the slide rail 33, and a slide roller 32 are connected to lift and suspend the box B A hoist type overhead crane having a lifting means 31 that can be lowered is employed.
However, the structure of the hanging mechanism 30 is not limited to this, and the main point is that the structure can lift and hang the box B, and can move forward and backward while the box B is lifted.

<5> Outrigger (FIGS. 2 and 3).
The outrigger 40 is a component for receiving the load of the box B on the ground.
The outrigger 40 of this example includes four support columns 41 connected to the side of the lower column 22, four support legs 42 attached to the lower portion of the support column 41, and two front and rear ends. And two support members 43 connected to the lower portion of the leg 42.
A shape steel is adopted for the support leg 42.

<5.1> Support column.
The support column 41 is a column that extends and contracts the support leg 42.
In this example, a rectangular column having a diameter larger than that of the support leg 42 is adopted as the support column 41, and an opening for accommodating the support leg 42 is formed below the support column 41.
In this example, a hydraulic cylinder is built in the opening of the support column 41. In addition, other known lifting devices may be employed.

<5.2> Support material.
The support member 43 is a component that contacts the ground and supports the load.
In this example, two shape steels extending substantially in parallel are employed as the support member 43.
By using the support member 43 as a long structure and supporting the load with a line instead of a point, it is possible to prevent burying in the ground.
However, the configuration of the support member 43 is not limited to this. For example, the two support members 43 may be formed in a square shape with the rear end side opened.
According to this structure, by separating the rear end side of the support member 43 from the tail portion A2, the side earth pressure behind the tail portion A2 that is weak in structure can be reduced.
Further, the support member 43 may not be provided, and it may be directly supported by the four support legs 42.

[how to use]
Then, the usage method of the box suspension apparatus 1 of this invention is demonstrated in detail.
In addition, well-known processes, such as excavation of the ground by a backhoe and advance of an open pit machine, are abbreviate | omitted.

<1> Preliminary arrangement of boxes.
The box B installed behind the open pit machine A is backfilled, and the truck is placed on the backfilling place with the box B of the loading platform facing forward.
A wire for staking is attached to box B.

<2> Grounding of the outrigger (FIG. 4B).
The hydraulic cylinders of the four support columns 41 are operated to extend the support legs 42, and the ground is pressed by the support material 43 to be grounded.
Thereby, the weight of the box suspension device 1 can be transferred from the open pit machine A to the ground.

<3> Lifting up the upper frame (FIG. 4C).
The hydraulic cylinders of the four lift-up means 23 are operated to lift up the upper column 13 in the lower column 22.
The lift-up height is set to be equal to or higher than the height required for the lifting mechanism 30 to lift and suspend the box B.
The lift-up may be performed before the outrigger 40 is grounded.

<4> Hanging box.
The slide table 34 on the girder 11 is moved backward, and the lifting means 31 is positioned above the box B arranged on the truck bed.
The wire of the box B is hung on the hook of the lifting means 31 and lifted upward.
At this time, at least a part of the load of the box B is transmitted from the suspension mechanism 30 to the ground on the side of the open pit machine A through the upper frame 10, the lower frame 20, and the outrigger 40. The side wall of the tail part A2 of the machine A can be prevented from being distorted and buried in the ground.
The box B is transported to the upper position of the front box B installation position by the slide base 34.
The box B is hung on the ground in the tail portion A2 by the lifting means 31. The left and right fine adjustments are made with the slide roller 32 as necessary.

<5> When there is an obstacle in front of the open pit machine.
If there is an obstacle such as a bridge in front of the open pit machine A, the frame interferes with the obstacle and cannot proceed as it is.
Even in such a case, the box suspension device 1 according to the present invention can reduce all four lift-up means and lower the height of the upper frame 10 so as to dive under the obstacle. Passing construction is possible (FIG. 4A).

<6> When the open pit machine is inclined (FIG. 5).
When the open pit machine A is inclined, the entire box suspension device 1 attached to the upper part is inclined, so that the load is applied to the slide roller 32 and the box B lifted by the lifting means 31 interferes with the column. , Etc. occur.
Even in such a case, the box suspension device 1 of the present invention rotates the screw jack and individually adjusts the height of the four tilt correcting means 24 so that the open pit machine A can be adjusted to the X- Even if it is inclined in any direction Y, the upper suspension mechanism 30 can be kept horizontal (FIG. 5).

<7> Load change function of the inclination correcting means.
The inclination correcting means 24 also has a load replacement function in addition to the above-described inclination correction function.
Depending on the state of the ground, there is a possibility that the ground under the support member 43 will be consolidated and subsided by the load of the box B when the box B is suspended.
In this case, if the pedestal 21 and the lower support column 22 are fixed, the load is transmitted to the open pit machine A by the amount of subsidence of the support member 43, and the lower part of the tail part A2 may be buried in the ground.
Therefore, when consolidation settlement under the support material 43 is confirmed, the transmission of the load to the open pit machine A can be prevented by shortening the inclination correcting means 24 by the amount of settlement and receiving the load again on the outrigger 40. .

DESCRIPTION OF SYMBOLS 1 Box suspension apparatus 10 Upper frame 11 Girder material 12 Beam material 13 Upper pillar material 20 Lower frame 21 Base 22 Lower support | pillar 23 Lift up means 24 Inclination correction means 30 Lifting mechanism 31 Lifting means 32 Slide roller 33 Slide rail 34 Slide base 40 Outrigger 41 Support post 42 Support leg 43 Support material A Open pit machine A1 Front part A2 Tail part B Box C Heavy machine

Claims (4)

In the open cut propulsion method, a box hoisting device for hanging the box on the ground in the tail part of the open pit machine,
A frame erected upward from both side walls of the tail portion to form a frame-shaped body;
A suspension mechanism capable of suspending the box and movable in the front-rear direction along the girder of the frame;
A plurality of outriggers connected to the frame and projecting to the side of the tail,
By extending the plurality of outriggers downward and grounding to the ground, it is possible to transfer at least part of the load of the box acting on the tail portion via the frame to the ground by receiving the outriggers. It is characterized by
Box hanging device.   The suspension mechanism includes a slide rail horizontally mounted in the width direction of the frame, a plurality of slide bases connected to both end sides of the slide rail and movable along the beam member, and along the slide rail. The box suspension device according to claim 1, further comprising a movable slide roller and a lifting means connected to the slide roller.   The frame includes a plurality of support columns, each of the plurality of support columns includes an inclination correction unit, and the height of the plurality of columns can be individually adjusted up and down by the inclination correction unit. Item 3. A box hoisting device according to item 1 or 2.   The said frame has the upper frame connected with the said suspension mechanism, and the lower frame connected with the said tail part, The said upper frame was supported by the said lower frame so that raising / lowering was possible, The 1 thru | or characterized by the above-mentioned. The box suspension device according to any one of claims 3 to 4.

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