JPS5835757Y2 - shield tunneling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shield tunneling machine, and more particularly to a shield tunneling machine equipped with a hanging fitting suitable for placing the shield tunneling machine in a starting shaft and taking it out of the arrival shaft using a crane.

The shield tunneling machine is placed in a starting shaft that is excavated in advance prior to tunnel excavation, and is removed outside the reaching shaft after tunnel excavation.

The placement and removal work of this shield tunneling machine in the shaft is performed by hooking a hanging wire extending from a crane to a hanging fitting attached to the shield skin.

Traditionally, this hanger consists of a plate with an opening that is welded to the shield skin.

Therefore, when the shield tunneling machine is moved up and down in the shaft using the hanging fitting, a shackle attached to a hanging wire is attached to the opening, thereby suspending the shield tunneling machine.

However, starting a shield excavator with the hanging fittings welded will increase digging resistance because the hanging fittings have a convex shape on the shield skin. This causes air leakage in pneumatic shield excavators.

Therefore, in order to obtain stable excavation work by the shield tunneling machine, the plate must be cut by melting after the shield tunneling machine is placed in the starting shaft and before starting. In order to lift the shield tunneling machine out of the shaft and remove it from the shaft, the plate must be welded to the shield skin again, which has the disadvantage that it takes a considerable amount of time to place and remove the shield tunneling machine in the shaft.

Therefore, an object of the present invention is to enable a shield tunneling machine to be placed and removed in a shaft without welding or fusing operations.

The present invention consists of a cylindrical shield skin having a pair of recesses each open to the outside and a threaded hole at the bottom of each recess, and a hanging metal fitting placed inside each recess. hand,
a hanging fitting having a surface that coincides with the outer peripheral surface of the shield skin and having an opening that can be aligned with the threaded hole; and pivoting the hanging fitting within the recess at a position separated from the threaded part. and a stopper which has a screw portion that is screwed into the threaded portion through the opening and removably fixes the hanging fitting.

The features of the present invention will become clearer from the following description of the illustrated embodiment.
As shown in the figure, the shield excavator is a mud pressurized type or a pneumatic type shield excavator, and includes a cylindrical shield skin 14 having a pair of recesses 12, each of which is open to the outside.

A protrusion 18 is provided at the bottom 16 of the recess 12 of the shield skin.

The convex portion has a screw hole 20 opened in the same direction as the direction in which the recess 12 opens.

Inside the recess 12, a hanger 24 is disposed along the axis of the shield skin 14 and has a planar surface 22 that coincides with the outer peripheral surface 14a of the shield skin 14, as shown in FIG. ing.

Also, the surface 22 is within the recess 12 and the shield skin 1
You may use the hanging metal fitting of the shape located below the outer peripheral surface 14a of 4.

The hanging fitting 24 has a pin hole 26 provided at one end 24a thereof substantially perpendicular to the axis of the shield skin 14,
A blank hole 2 that can be aligned with the tapped hole 20 at the other end 24b
8 is provided.

The hole has a larger diameter than the punch hole 20, and is opened wide at the top.

As shown in FIG.
A pin 30 is inserted into the pin 6 and pivoted in the recess 12 at a position separated from the tapped hole 20 of the projection 18.

The hanging fitting 24 is inserted into the spring hole 28 as shown in FIG.
The shield skin 14 is attached to the shield skin 14 within the recess 12 by a fastener 38 consisting of a ring-shaped member 32 disposed at Removably fixed.

Alternatively, the hanging fitting 24 may be fixed to the shield skin 14 using a stopper 38 formed by integrally molding the ring-shaped member 32 and the bolt 36.

When the shield excavator 10 according to the present invention is placed in the starting shaft by a crane, the hanging fitting 24 is rotated outward of the shield skin 14, as shown in FIG.

Thereafter, as shown in FIG. 4, a shackle 42 attached to the tip of a hanging wire 40 extending from the crane is connected to the hanging fitting 24.

This connection is achieved by inserting the shackle pin 48 into a pair of openings 44 and 46 provided at the tip of the shackle 42 and into the flap hole 28 of the hanging fitting 24.

After the shield tunneling machine 10 is placed in the starting shaft and prior to starting, the hanging wire 40 and the hanging fitting 24 are uncoupled, the hanging fitting 24 is rotated inward of the shield skin 14, and the process is shown in FIG. 2 again. As shown, it is housed in a recess 12.

As a result, the surface 22 of the hanging fitting 24 is aligned with the outer circumferential surface 14 a of the shield skin 14 .

After that, launch the shield excavator.

In the starting area of the starting shaft, a shield backing member (not shown) is attached to the tunnel wall surrounding the shield tunneling machine to prevent water and air leakage.
Since the seal backing member 4 does not protrude from the outer circumferential surface 14a of the shield skin 14, the seal backing member can maintain the sealing effect against pressure water and air.

Further, when the shield excavator 10 is to be lifted up by a crane to be removed from the arriving pile after the tunnel excavation is completed, the stopper 38 is removed and the hanging wire 40 is connected to the hanging fitting 24 in the same manner as described above.

In addition, in the example described above, the convex portion 18 is provided on the bottom 16 of the recess 12.
The other end 24b of the hanging fitting 24 provided with the hole 28 is inserted into the recess 1.
The bottom part 16 of the recess 12 is provided with a threaded hole that can be aligned with the spring hole 28, and the stopper 38 is screwed into the threaded hole through the hole 28. The hanging fitting 24 can also be secured to the shield skin 14 within the recess 12 by mating and soiling.

According to the shield excavator according to the present invention, the shield excavator can be placed inside the pile making machine and removed outside the pile making work without welding or fusing the hanging fittings attached to the shield skin. .

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of the shield tunneling machine according to the present invention, Fig. 2 is a partial sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a partial sectional view of the shield tunneling machine according to the invention. FIG. 4 is a partial cross-sectional view similar to FIG. 1 showing a removed state, and FIG. 4 is a partially cutaway side view showing the shield tunneling machine of the present invention suspended by a hanging wire. 10: Shield excavator, 12: Recess, 14: Shield skin, 18: Convex part, 20: Screw hole, 22: Surface of hanging metal fitting, 24: Hanging metal fitting, 26: Pin hole, 28: Stupid hole, 3
0: pin, 34: upper part, 38: stopper.

Claims (1)

[Scope of utility model registration request] a cylindrical shield skin having a pair of recesses each open outward and having a threaded hole at the bottom of each recess; and a hanging fitting disposed within each recess, the shield a hanging fitting having a surface that coincides with the outer peripheral surface of the skin and having an opening that can be aligned with the threaded hole; and a pin that pivots the hanging fitting in the recess at a position spaced from the threaded part. A shield excavator, comprising: a screw portion that is screwed into the threaded portion through the opening, and a stopper that removably fixes the hanging fitting.