JPH0322389Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is a folding type shield machine, that is, the main body of the shield machine is divided into two parts: a front body and a rear body. This invention relates to a support device for a shield jack that propels the front shell by applying a reaction force to the segments during excavation in an excavator that excavates by bending relative to the rear shell.

"Prior art" This type of conventional device is shown in FIGS. 10 to 14.
The diagram will be explained.

Reference numeral 16 is a front shell, 17 is a rear shell, and a shield jack 10 is provided across both. The rear end of the shield jack 10 is spherically pivoted to a shield jack spreader 13.

The shield jack 10 is supported by the jack receiving ring 1. A leaf spring 15 is attached to the jack receiving ring 1 with a pin shaft 15', and this leaf spring 15 is attached to the ring girder 11 of the rear body 17. With some force, the shield jack spreader 13
It serves to press the rear fuselage 17 against the tail skin plate 14 side. S indicates a segment.

In this case, when constructing a curve, when the curvature of the tunnel is small and the angular displacement between the front shell 16 and the rear shell 17 becomes large, the leaf spring 15 is held down by the shield jack 10 due to its structure. Since the stroke of the shield jack 10 is small, the position of the point of application P of the thrust of the shield jack 10 becomes unstable and cannot be kept constant.

This will be explained with reference to FIGS. 11 to 13.

FIG. 14 shows the part indicated by the arrow in FIG. 11. As can be seen from the figure, unless the shield jack 10 is pressed down with a leaf spring 15 or the like, the segment S The point of application of the required thrust of the same jack 10 cannot be located at the point P' whose dimension is C, and that position is the point P.

In this case, if the shield jack 10 on the inside of the curve is used when constructing the curve, the segments S will be pushed radially inward from the outside of the curve, resulting in damage to the segments S.

Keeping the position of the thrust application point with respect to the segment S constant as the dimension C means that the shield jack 10 in the ring girder 11 of the rear fuselage 17
It is clear from FIG. 14 that the center of is moved from point a to point b, and that the point of thrust application P must now be shifted by a dimension d to the point of thrust application P'.

However, the leaf spring 15 has a sufficient pressing stroke, and as a result, the shield jack spreader 13 is pushed toward the tail skin plate 14, and the segment S is used as a reaction force via the shield jack spreader 13. There is no problem if this is pressed along the tail skin plate 14, but if there is no pressing force from the leaf spring 15,
Since the point of action of the shield jack 10 is unstablely located between the points P and P', the above-mentioned disadvantages occur.

Note that FIG. 12 shows the part indicated by the arrow in FIG. 11, and since this is outside the curve, no particular problem will occur.

``Problems that the invention attempts to solve'' This invention is designed to solve the following problems, especially when constructing a curved tunnel with a small curvature. This aims to improve the drawback that the position of the point of action of the thrust of the shield jack becomes unstable and cannot be maintained at a constant desired position, and to prevent breakage of the segment due to this.

``Means for Solving the Problems'' This invention aims to support the rear side of the shield jack with a jack receiving ring, and connect a pin protruding from the side of the jack receiving ring to the inner side supported by the ring girder. The hanger is slidably fitted into the long groove of the bracket, and the hanger is fixed to the outer bracket with a pin, and a coil spring is installed between the hanger and a wing plate extending laterally from the jack receiving ring. is installed, and when constructing a curve, the rear side of the shield jack on the inside of the curve is pressed against the tail skin plate of the rear fuselage using this long-stroke coil spring.

Embodiment The configuration will be explained in detail based on the drawings.

Figures 1 to 3 are schematic explanatory diagrams of a folding type shield machine, in which a yawing jack 18 is attached between the front body 16 and the rear body 17, and it bends to the left when constructing a curve. If so, extend the right yawing jack 18, shorten the left one,
The front shell 16 is bent in the middle with respect to the rear shell 17, and the shield jack 10 is extended and thrusted using the segment S as a reaction force base.

When turning to the right, do the opposite.

Figures 4 to 6 show the main parts of this machine and explain its functions.
A shield jack 10 is fitted into a ring girder 11 provided at 7, and its side is supported by a jack receiving ring 1.

This portion of the jack receiving ring 1 will be explained in detail with reference to FIGS. 4 to 9.

The jack receiving ring 1 supports the rear side of the shield jack 10 as shown in FIGS. 4 to 6.

The jack ring 1 is pushed toward the outer diameter side of the shield by a coil spring 8, as is clearly seen in each row of FIGS. 4 to 6.

3 is a hanger 3 provided on the center side of the shield of the jack receiving ring 1, and a coil spring 8 is installed between the hanger 3 and a wing plate 1' (see Fig. 7) which is provided laterally than the jack receiving ring 1. It will be installed.

The coil spring 8 exerts a reaction force on the hanger 3 and pushes the wing plate 1' of the jack receiving ring 1 toward the outer diameter side of the shield.

The hanger 3 is supported by an outer bracket 6 via a pin 5, which is slidably attached to a bolt 12 on a ring girder side wall 11' provided on a ring girder 11, as shown in FIG.
Supported by The bracket 6 is a stopper 7 welded to the ring girder side wall 11', and its movement in the vertical direction is restricted as shown in FIG.

Shield jack 1 is attached to jack receiving ring 1.
The rear side of the ring 1 is inserted and supported, and the pin 2 protruding from the side of the ring 1 is inserted into the inner bracket 6'.
It is slidably fitted into a long groove 9 cut into the hole.

The inner bracket 6', like the outer bracket 6, is provided on the ring girder side wall 11'.

A cutout hole 15 is provided in the ring girder side wall 11'.
is provided, and the shield jack 10 is fitted into it (see Fig. 8). Shield jack 10 has the same hole 15
The hole 15 is made slightly larger than the outer diameter of the shield jack 10 so that necessary movement can be made within the shield jack.

"Function" When a tunnel is constructed in a straight line or in a neutral state, the front shell 16 and the rear shell 17 are in a straight line, as shown in Figure 4 (see also Figure 13), and this is in a neutral state. state. The point of thrust application of the shield jack 10 is indicated by a point P.

When constructing a curve, on the outside of the curve, the 6th
As shown in the figure (see also Figure 12), the rear body 17
extends toward the front body 16. Therefore, the point of thrust application of the shield jack 10 moves from point P to a point P'' above it. Therefore, the coil springs 8, 8 are compressed, and the tip of the shield jack 10 moves the thrust force of the shield jack 10. Spretsuda 13
There is no difficulty in moving the front body 16 along the tail skin plate 14 of the rear body 17 and using the segment S as a reaction force to propel the front body 16.

In this case, the bracket 6 that fixes the hanger 3 with the pin 5 can move until it hits the stopper 7, as shown in FIG. It occupies a position in the long groove 9 of the bracket 6' in proportion to the compression of the coil spring 8.

When constructing a curve, the rear body 17 contracts with respect to the front body 16 on the inside of the curve, as shown in FIG. 5 (see also FIG. 14). In order for the shield jack spreader 13 to move along the tail skin plate 14 and properly propel the front fuselage 16 using the segment S as a reaction force, the thrust application point of the shield jack 10 must be moved from the point P. We must move to point P' below it.

That is, the coil spring 8 has to expand and still press the rear side of the shield jack 10 downward with its compressive force, but in this invention, the stroke of the coil spring 8 is made large. This allows the shield jack spreader 13 to be moved along the tail skin plate 14.

In this case, the pin 2 of the jack ring 1 reaches the lower end of the long groove 9 of the bracket 6', and therefore,
The other bracket 6 moves downward until it hits the lower stopper 7, and the coil springs 8, 8 are expanded.

``Effect of the invention'' In this invention, by using a coil spring instead of a leaf spring as in the conventional case, even when the angle change between the front body and the rear body becomes large when constructing a curve, the shield jack can be easily fixed. The point of thrust application can be kept stable and constant.

In other words, when the shield is bent in the middle, if the position of the shield jack spreader is kept constant from the outer plate of the shield machine, the position of the shield jack relative to the ring girder will be significantly different on the outside and inside of the bend of the shield machine. Changes to

In other words, if the supporting structure of the shield jack in the ring girder cannot always keep the position of the shield jack spreader constant, the point of application of the shield jack to the segment will shift and damage the segment.
Conventional devices use leaf springs, so the stroke is small and cannot respond to changes in the jacking position.

However, when using a coil spring like the one proposed in this invention, the stroke is sufficient, and the shield jack spreader is always kept in a fixed position with a constant force, so that the point of force always acts on the thrust point of the segment, which can cause damage to the segment when constructing curves. Never.

[Brief explanation of drawings]

Figure 1 is a vertical sectional side view of the main part showing the outline of the folding type shield machine, Figure 2 is a diagram of the operation of the yawing jack during curve construction, Figure 3 is a diagram of the operation of the shield jack, and Figure 4 is a diagram of the operation of the shield jack. Figures 6 to 6 are explanatory diagrams showing the operation of this device, in which each figure A is a side view, each figure B is a cross-sectional view taken along the line -A of each figure A, and Fig. 7 is a view of this device from the rear side. It is a rear view as seen, and the left half is a cross-sectional view thereof. Fig. 8 is a side view of Fig. 7 seen from direction A, Fig. 9 is a side view similarly seen from direction B or C, and Fig. 10 The figure shows a conventional device, with A in the figure being a side view and B in the figure being a
The X-ray cross-sectional views and Figures 11 to 14 are illustrations of misalignment in the installation position of the shield jack. Fig. 12 is a longitudinal side view showing the outside of the curve of each shell during curve construction; Fig. 13 is a longitudinal side view showing the neutral state during straight construction; It is a vertical side view showing the inside. 1... Jacket ring, 1'... Vane plate, 2...
...Pin, 3...Hanger, 5...Pin, 6...Outer bracket, 6'...Inner bracket, 8
... Coil spring, 9 ... Long groove, 10 ... Shield jack, 11 ... Ring girder, 16
...front torso, 17...rear torso.

Claims (1)

[Scope of utility model registration request] The front shell 16 is foldably fitted to the rear shell 17, and the shield jack 10 with the front end pivoted to the front shell 16 is fitted to the ring girder 11 provided on the rear shell 17. The rear side is supported by a jack receiving ring 1, and a pin 2 protruding from the side of the jack receiving ring 1 is slidably fitted into a long groove 9 of an inner bracket 6' supported by a ring girder 11. Similarly, on the outer bracket 6 supported by the ring girder 11, a hanger 3 provided on the center side of the shield of the jack receiving ring 1 is attached to a pin 5.
This device is a shield jack support device for a folding type shield machine, in which a coil spring 8 is installed between a hanger 3 and a wing plate 1' extending laterally from a jack receiving ring 1.