JPS63171997A - Messer shield excavator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application The present invention relates to a Metsucel shield excavator having a Metsucel blade movably provided in the excavation direction.

(b), conventional technology Conventionally, this type of metsu cell shield excavation 4 sale.

It has a front casing equipped with a Metsucel blade and a rear casing for taking the cutting reaction force. I was moving it to.

At this time, in order to prevent the ground from collapsing due to a gap between the rear end of the Metsu cell blade that moved in the direction of the face and the rear casing, an intermediate space is placed between the front casing and the rear casing. A ring called a ring was interposed. This intermediate ring has conventionally been integrally formed into a cylindrical shape and attached to the rear casing.

(C) 0 Problems to be Solved by the Invention However, with this method, whenever the Metsucel blade protrudes and retreats in the direction of the face, gravel gets caught between the Metsucel blade and the intermediate ring. This had the drawback of requiring a large amount of driving force.

In order to eliminate the above-mentioned drawbacks, the present invention provides a Metsu Cell Shield that can remove sand and gravel caught between the Metsu Cell Blade and the intermediate ring, and reduce the driving force required to drive the Metsu Cell Blade. The purpose is to provide excavators.

(d) An additional means for solving the problem, that is, the present invention provides a cover plate L, -1- (9d) at a position where it can face the Metsu cell blade (2a) of the intermediate ring (9). The ring (9) is configured to be freely openable inside the ring (9).

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions in the drawings. r (e) below
The same applies to the column ``, action''.

(e) 0 effect With the above-described configuration, the present invention has a Metsu cell blade (2
If gravel is caught between a) and the intermediate ring (9), open the cover plate (9d) to expose the Metsu cell blade (2a) and remove and clean the gravel in that state. It acts on

(f), Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view showing an embodiment of the Metsu cell shield excavator according to the present invention, and FIG. 2 is a perspective view of the intermediate ring portion of the Metsu cell shield excavator shown in FIG.

As shown in FIG. 1, the Metsu Cell Shield excavator 1 has a front casing 2 and a rear casing 3 that are formed in a cylindrical shape and are connected in the left and right direction in the figure.
is provided with a frame 2b formed in a cylindrical shape. A plurality of Metsu cell blades 2a are arranged in a cylindrical shape around the frame 2b to form the outer shape of the front casing 2, and each Metsu cell blade 2a is movable in the excavation direction, that is, in the directions of arrows A and B. It is set in.

A hydraulic jack 6 is arranged between each Metsu cell blade 2a and the frame 2b, and by selectively driving the hydraulic jack 6, any Metsu cell blade 2a can be selected.
can be driven to move in the directions of arrows A and B as appropriate. A cutter body 7 is installed on the frame 2b, and the cutter body 7 has a rod-shaped cutter 7a that can be freely rotated and oscillated in the directions of arrows C and D and in the direction perpendicular to the plane of the paper. Supported.

On the other hand, an intermediate ring 9 is provided on the left side of the rear casing 3 in FIG. 1, and the intermediate ring 9 is nested inside the cylindrical Metsu cell blade 5. The intermediate ring 9 has a flange portion 9 as shown in FIG.
a, 9b, and rod-shaped frame members 9C are connected and arranged annularly at predetermined intervals between the seven flange portions 9a and 9b to connect the two. Each frame material 9c
, 9c, a cover plate 9d formed in an arc shape and forming a part of the outer shape of the intermediate ring 9 connects the adjacent frame members 9c and 19c, as indicated by diagonal lines in FIG. 2. Each cover plate (9d) is provided so as to be removable toward the inside of the intermediate ring 9. Further, between the flange portion 9a and the frame 2b of the front casing 2, a plurality of shield jacks 10 are provided.
A cylindrical press ring 11 is provided along the inner circumference of the intermediate ring 9, and on the right side of the rear casing 3 in FIG.
It is provided so as to be slidable in the B direction. Press ring 11
A plurality of press ring jacks 12 are arranged between and of the rear casing 3 along the inner circumference of the rear casing 3, and a gauge ring jack is further provided inside the press ring jacks 12. 13 are arranged along the inner circumference of the rear casing 3. At the tip of the gauge ring jack 13, there is a gauge ring 15 formed in an annular shape.
is installed, and on the right side of the gauge ring 15 in the figure,
A formwork 16 assembled and connected in a cylindrical shape is installed.

Since the Metsu cell shield excavator 1 has the above-described configuration, the Metsu cell shield excavator 1 can be used to create a tunnel.
7, the hydraulic jack 6 of the 11'' ring 2 is selectively driven to selectively move the metsu cell blade 2a in the direction of the face 19, that is, in the direction of the arrow. Then, Metsu Cell Blade 2a has Frame 2b1 Shield Shirt: Y 10.11 Ku Ring 3, Game
The reaction force is taken from the formwork 16h via the sillage jack 13 and the gauge ring 15, and the face 1 is maintained at a predetermined excavation pressure.
9 and cuts the face 19 in the entry direction. thus,
By sequentially moving the metsu cell blades 2a around the frame 2b selectively in the inward direction to cut the face 19, a circular cut corresponding to the cross section of the front casing 2 is made in the face 19.

Therefore, by operating the cutter body 7, the cutter 7a is rotated and swung in the directions of arrows C and D and in the direction perpendicular to the plane of the paper, and the periphery is cut into a circular shape by the Metzel blade 2a.
The cut face 19 is excavated.

At this time, the shield jack 10 and the gauge ring jack 13 are also driven simultaneously, and the gauge ring jack 13,
The frame 2ble is pressed in the A direction by taking a reaction force from the formwork 16 via the gauge ring 15, and the front casing 2 is moved in the entry direction by a distance corresponding to the amount excavated by the cutter 7a.
and move the rear casing 3 forward.

Front casing 2 and rear casing 3 in the direction of predetermined pressure glA
When the gauge ring 15 moves forward, the gauge ring 15 is moved in the direction of the arrow by the gauge ring jack 13, the gauge ring 15 is separated from the formwork 16, and a new formwork 16 is inserted between the formwork 16 and the gauge ring 15. Then, it is installed so as to be connected to the existing formwork 16, and a concrete pouring space 20 is formed by the gauge ring 15, press ring 11, formwork 16, etc. Once the concrete placement space 20 has been formed, concrete mortar is supplied into the concrete placement space 20 via the concrete supply hose 21, and the press ring 11 is further moved in the entry direction by the press ring jack 12. Then, concrete is supplied from the tip of the press ring 11 through the concrete supply hose 22 into the space 23 created as a result of the movement of the press ring 11.
Place more mortar. After concrete mortar has been placed in the concrete placement space 20 and the space 23 in this way, the Metsu Cell Shield excavator 1 is routed in the entry direction as described above, but after the rear casing 3 has moved, Tail void 26 between the ground 25 and the space 23
occurs. Therefore, the press ring jack 12 is driven to move the press ring 11 in the direction B to push the concrete/mortar in the space 23 from the space 23 toward the tail void 26.
and construct the lining 27.

By the way, during excavation with Metsu Cell Shield Excavator 1,
When the Metsucel blade 2a is selectively moved and driven in the inward direction to make a cut in the face 19, the Metsucel blade 2a
Since the rear end 2C of the metsu cell blade 2a of the intermediate ring 9 portion where a has moved in the entry direction moves in the entry direction, its outer circumferential surface directly faces the ground 25. Then, the sand and gravel fall or move from the ground 25 side toward the intermediate ring 9.
The Metsu cell blade 2a that has moved in the incoming direction moves back in the direction B (at the point when the Metsu cell blade 2a moves in the incoming direction).
Such sand and gravel will get caught between the intermediate ring 9 and the intermediate ring 9, resulting in loss of the driving force of the hydraulic jack 6 that drives the Metsu cell blade 2a. Therefore, if there is a risk that sand and gravel will become stuck between the Metsu cell blade 2a and the intermediate ring 9 (gap 29 in Fig. 1) and cause an obstacle to excavation, the Metsu cell blade 2a should be moved in the direction B. In the retracted state, remove the cover plate)-9d at the position corresponding to the Metsu cell blade 2a inside the intermediate ring 9,
Clean the sand and gravel caught between the cover plate 9d and the Messel blade 2a. When cover play) 9d is removed, the Metsu cell blade 2a will immediately appear there, so the Metsu cell blade 2a will appear there.

The sand and gravel trapped between the blade 2a and the intermediate ring 9 can be easily removed and cleaned.

In this way, by periodically cleaning and removing the sand and gravel caught between the Metsu cell blade 2a and the intermediate ring 9, papermaking,
The space between the metsu cell blade 2a and the intermediate ring 9 is always maintained in a good condition with no grit and gravel, and the hydraulic jack 6
The moving operation of the Metsu cell blade 2a is performed smoothly.

In addition, although the above-mentioned embodiment described the case where the cover plate 9d was provided removably with respect to the intermediate ring 9, as long as the cover plate 9d is provided releasably inside the intermediate ring 9, the cover plate 9d is attached to the intermediate ring 9. It does not necessarily have to be provided in a removable form, for example, it may be provided on the frame member 9C so as to be openable and closable using a hinge or the like.

(g) 0 Effects of the Invention As explained above, according to the present invention, the intermediate ring 9
Since the cover plate 9d is freely opened inside the intermediate ring 9 at a position where it can face the Metsu cell blade 2a, the Metsu cell blade 9d can be opened freely inside the intermediate ring 9. It is possible to easily remove sand and gravel caught between the intermediate ring 2a and the intermediate ring 90, and the driving force required for driving the Metsu cell blade 5 in the driving means of the Metsu cell blade 5 such as the hydraulic jack 6 can be reduced. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the Metsu cell shield excavator according to the present invention, and FIG. 2 is a perspective view of the intermediate ring portion of the Metsu cell shield excavator shown in FIG. 1...Metsu Cell Shield If I'l114
112...Front case ring 2a...Metsu cell blade 3...Rear casing 9...Intermediate ring 9d...Cover plate applicant Mitsui Construction Co., Ltd. Agent Patent Attorney Phase 1) Shinji (and 2 others)

Claims (1)

[Scope of Claim] A Messel shield excavator having a front casing in which a Messel blade is provided so as to be freely movable and driven in the excavation direction, and a rear casing provided behind the front casing with an intermediate ring interposed therebetween, wherein the intermediate ring comprises: A Messel Shield excavator is constructed by installing a cover plate that can be opened freely inside the intermediate ring at a position where it can face the Messel blade.