JPS624623Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention fixes a lower bulkhead and an upper bulkhead to the front of the cut-and-cover shield body of the hull structure, and attaches a face to the lower bulkhead and upper bulkhead, respectively. This invention relates to an excavation shield device in which an upper cutter foil and a lower cutter foil for excavating the front surface are rotatably supported.

Next, an example of this type of cut-and-cut shield device will be explained with reference to FIGS. 1 and 2.

A lower bulkhead 2 is fixed to the front lower side of the cut-and-cover shield body 1 of the hull structure for preventing the collapse of earth and sand, and an upper bulkhead 3 is fixed to the upper side. Support members 4 and 5 are fixed to the intermediate portion, and an extrusion hole 1a is provided in the rear wall portion. A turning ring 6 is attached to the lower bulkhead 2 and has a gear 7 on its rotating part on the outer periphery.
A support frame 9 for the lower cutter foil 8 is fixed to the rotating portion. The support frame 9 includes
A hole 10 is provided in its outer part for passing excavated earth and sand.

A pinion 12 is attached to the output shaft of a hydraulic motor 11 attached to the lower bulkhead 2 and meshed with a gear 7 provided on a rotating portion of the swing ring 6.
An inner cover 13 is provided between the inner circumference of the turning ring 6 and the intermediate portion of the support frame 9 and the lower bulkhead 2.
is attached, and an outer cover 14 is attached between the lower part of the inner cover 13 and the lower front part of the cut-and-cut shield body 1.

Between the middle part of the lower bulkhead 2 and the supporting member on the central inner circumferential side of the inner cover 13, excavated earth and sand is transported into the cut-and-cover shield main body 1 on the rear side of the lower bulkhead 2. A screw conveyor 15 is installed for moving the vehicle, and a plurality of propulsion jacks 16 are installed between the lower bulkhead 2 and the support member 4.

The outer cover 14 and the inner cover 13 are used to prevent excavated soil from entering drive parts such as the turning wheel 6 and pinion 12, and a seal ( (not shown) is installed.

A housing 17 is fixed to the back side of the upper bulkhead 3, and the central shaft 19 of the upper cutter foil 18 is rotatably supported by bearings attached to the upper bulkhead 3 and the housing 17, respectively. . A gear 20 fixed to the central shaft 19 is housed within the housing 17, and this gear 20 meshes with a pinion 22 attached to the output shaft of a hydraulic motor 21. Hydraulic motor 22 is in housing 1
It is fixed to the outer wall of 7.

The upper cutter foil 18 and the lower cutter foil 8 are arranged to be out of phase with each other vertically and front and back, and the outer peripheral portion of the upper cutter foil 18 projects from the other surface.

This cut-and-cut shield device is for burying a fume pipe 23, and the propulsion of the cut-and-cover shield main body 1 relative to the burying is performed in the following manner. That is, the hume pipe 23 to be buried in the cut-and-cut shield main body 1 is suspended, and this is inserted into the existing hume pipe 2.
3, the propulsion jack 16 is extended, and the excavation shield main body 1 is advanced while the reaction force is taken by the Himum tube 23. The extrusion hole 1a of the cut-and-cut shield main body 1 slides on the outer circumferential surface of the hume tube 23. As it moves forward, the front face of the excavation shield body 1 is excavated by the lower cutter foil 8 and the upper cutter foil 18, and the excavated soil is discharged by the screw conveyor 15. Since excavation is carried out with the lower cutter foil 8 and the upper cutter foil 18 while the excavation shield main body 1 is propelled by the propulsion jack 16, both cutter foils 8 and 18 are in close contact with the face. As the excavated shield main body 1 moves forward, the space 24 created at the rear is filled with excavated earth and sand or earth and sand prepared in advance, and the humid pipe 23 is buried therein.

The front face of the cut-and-cut shield body 1 is U-shaped as shown in FIG. 2, and the diameters of the upper cutter foil 18 and the lower cutter foil 8 for cutting the face are matched to the width of the cut-and-cut shield body 1. A portion of the upper cutter foil 18 will protrude above the ground. For this reason, the excavated earth and sand on the upper side of the cut-and-cut shield body 1 is removed from the upper bulkhead 3.
Overflowing to the rear, the upper and lower Katsuta foils 1
8, 8 may become clogged with earth and sand, making it impossible to operate, posing a danger to the operator and other workers inside the cut-and-cover shield body 1, and requiring a great deal of effort to dispose of the overflowing earth and sand. This requires a lot of effort and also obstructs the progress of the cut-and-cover shield body 1. In addition, the excavated earth and sand is collected in the front chamber of the lower bulkhead 2 and upper bulkhead 3, and the earth pressure holds the face.
This invention is intended to eliminate the above-mentioned drawbacks, and is characterized by the provision of a cover at the top of the upper bulkhead to cover the upper outer periphery of the upper bulkhead foil.

An embodiment of this invention will be described below with reference to FIGS. 3 and 4. In both figures, the same reference numerals as in FIGS. 1 and 2 represent the same things.

A vertical plate part 25a of a cover 25 that covers the part of the upper cutter foil 18 that protrudes above the ground is joined to the upper part of the upper bulkhead 3, and the cover 25 is fixed to the upper part of the cut-and-cover shield body 1. . Others are the same as those shown in FIGS. 1 and 2.

The earth and sand excavated by the upper katsuta foil 18 and the lower katsuta foil 8 fills the chamber formed at the front of the upper bulkhead 3 and cover 25, and the lower bulkhead 2, and the earth pressure causes the face to Supported,
The excavated earth and sand are discharged by a screw conveyor 15. Then, as the propulsion jack 16 extends, the excavated shield main body 1 is advanced. The top of the upper cutter foil 18 is the cover 25
, the excavated earth and sand will not climb over the upper bulkhead 3 and overflow into the excavated shield main body 1.

The fume tube 23 is safely connected inside the cut-and-cut shield body 1, and the cut-and-cut shield body 1 is sequentially propelled by the propulsion jack 16.

In addition, as an embodiment of this invention, one cutter foil was installed in each of the upper and lower sections. However, for example, six cutter foils can be used, including three upper, middle, and lower foils, and two sets of these. etc., there may be more than two.

As explained above, according to this invention, the excavated earth and sand does not overflow over the upper partition wall 3 and overflow into the excavation shield main body 1, so that the driving parts of the upper cutter foil and the lower cutter foil are used for excavating. Can prevent filling with earth and sand, cut-and-cover shield body 1
The safety of workers inside can also be ensured. Further, a chamber is formed in the front part of the cutting shield main body 1 by the lower partition wall 2, the upper partition wall 3, and the cover 25, and the excavated earth and sand filling the chamber can hold the face well.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view showing a trenchless shield device according to this invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a cross-sectional side view showing an embodiment of this invention.
FIG. 4 is a front view of FIG. 3. 1... Cut-and-cut shield body, 1a... Hole for extrusion, 2... Lower bulkhead, 3... Upper bulkhead, 4...
...Supporting member, 5...Supporting member, 6...Swivel ring, 7
... Gear, 8 ... Bottom cutter wheel, 9 ... Support frame, 11 ... Hydraulic motor, 12 ... Pinion, 13 ... Inner cover, 14 ... Outer cover, 15 ... Screw Conveyor, 16... Propulsion jack, 17... Housing, 18... Upper cutter wheel, 19... Center shaft, 20... Gear, 21... Hydraulic motor, 22... Pinion, 2
3... Huyum tube, 25... Cover.

Claims (1)

[Scope of utility model registration request] A lower bulkhead and an upper bulkhead are fixed to the front part of the cut-and-cut shield body of the hull structure, and an arbitrary number of upper cutter foils are used to excavate the front face of each of the lower and upper bulkheads. In the cut-and-cut shield device in which the lower cutter foil is rotatably supported,
A cut-and-cut shield device characterized by being provided with a cover that is connected to the upper bulkhead and covers the upper outer periphery of the upper cutter foil.