JP3288349B2 - Water stop device of shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stopping device for a shield machine, and more particularly, to a body when a cylindrical body is loosely or internally fitted to an inner surface or an outer surface of a body member of the shield machine. The present invention relates to a water stopping device that can simplify the structure of a water stopping device that seals an annular gap between a member and a cylindrical body, and that can prevent damage and wear from earth and sand.

[0002]

2. Description of the Related Art In recent years, tunnels for water supply and sewerage, common trenches, and the like are often excavated by a shield method, in which case the construction period is limited, and the distance that can be excavated by one shield excavator is limited. In many cases, a plurality of shafts are provided, and the space between the shafts is dug by each shield machine. The tunnel may have the same diameter or the diameter may change along the way.

In the case of a tunnel formed underground in an urban area,
Since the structures are often congested both underground and underground, it is not possible to form a shaft, so two shield excavators of the same diameter or different diameters are excavated from the separation point in the phase approaching direction, and finally two
Various technologies for joining the front ends of the shield excavators underground have been proposed and put to practical use. For example, 5-8
No. 8357 describes an underground joint type shield excavator in which two shield excavators having the same diameter are joined underground via a cylindrical body.

In the underground shield type excavator, a cylindrical body provided near the inside of the front body of the penetrating side shield excavator is sequentially extruded by a plurality of extrusion jacks, and partially extruded into the front end of the receiving side shield excavator. Then, the tip of the cylinder is pressed against a rubber receiving ring to stop water. In some cases, the receiving ring is fixedly provided, but recently, the receiving ring is provided so as to be movable in an annular gap between the outer cylinder and the inner cylinder. It is configured such that the receiving ring is retracted to the rear end and the receiving ring is advanced and pressed against the tip of the cylindrical body during underground joining.

On the other hand, the applicant of the present application has disclosed Japanese Patent Application Laid-Open No. Hei 8-9339.
No. 0 and Japanese Patent Application No. 9-369611 have proposed a water stopping device capable of stopping a slide portion of a shield machine. In the water stopping device of the shield machine described in JP-A-8-93390, the front and rear ends of the annular elastic membrane member are fixed, the annular seal member is provided inside the annular elastic membrane member, and the annular elastic membrane member is pressurized by a water injection mechanism. The annular elastic membrane member is inflated inward by supplying pressurized water to the outside, and the annular seal member is pressed against the inner cylindrical member inside thereof to stop water.

In the water stopping device of the shield machine described in Japanese Patent Application No. 9-369611, an annular recess formed on the inner surface of the front end of a tubular member into which a tubular body penetrates, and an annular recess formed in the annular recess. An annular elastic membrane member provided, an annular seal member inside the annular elastic membrane member, and pressurized water injection for injecting pressurized water to the outer surface side of the annular elastic membrane member to press the annular seal member against the outer peripheral surface of the cylindrical body. A protective cylinder member for opening and closing the inner surface of an annular recess accommodating the annular elastic membrane member and the annular seal member, and a hydraulic cylinder for driving the protective cylinder member to advance and retreat in the axial direction. .

[0007]

[Problems to be Solved by the Invention]
In the water blocking structure of the shield machine described in Japanese Patent Publication No. 7, the receiving ring is disposed inside the vicinity of the front end of the front fuselage. When the amount of wear is large, the water stopping function after underground joining cannot be secured. In addition, the earth and sand are easily bitten between the receiving ring and the distal end portion of the cylindrical body, and the water stopping performance is easily reduced.

In the water stopping device of the shield machine described in Japanese Patent Application No. 9-369611, a protective cylinder member is provided for opening and closing the inner side of an annular recess accommodating an annular elastic membrane member and an annular sealing member. Therefore, while the annular seal member is not damaged or worn during normal shield excavation, the protection cylinder member, a hydraulic cylinder for driving the protection cylinder member backward, the protection cylinder member and the annular recess are provided. In order to increase the water stopping performance, a soil seal or the like is required, so that the number of parts increases and the production cost increases. In addition, since the protection cylinder member is smoothly moved backward, the processing cost of the sliding surface increases. The operation time of underground joining is also increased by the amount by which the protection cylinder member is driven backward.

SUMMARY OF THE INVENTION It is an object of the present invention to simplify the structure of a water stop device and reduce manufacturing costs, prevent damage and abrasion of an annular seal member of the water stop device, improve water stop performance, and join underground. Can be simplified.

[0010]

According to the first aspect of the present invention, there is provided a water blocking device for a shield machine, which is provided on an inner surface of a body member of the shield machine and a tubular body is loosely fitted on the body member. In a water stopping device for sealing an annular gap between a body member and a cylindrical body, an annular recess formed in an inner peripheral surface portion of the body member and a fluid storage chamber formed in the annular recess and formed on an outer peripheral side. An annular elastic membrane member, an annular seal member disposed near the inner peripheral surface of the annular elastic membrane member and having one end in the axial direction fixed to the body member and the other end forming a free end; An elastically deformable cover member that covers the inner peripheral surface of the annular seal member and protects the annular seal member in a state where the pressurized fluid is not contained, and covers most of the inner peripheral surface of the annular seal member.
A plurality of strip-shaped first members arranged side by side in the circumferential direction
A spring plate member, and an inner peripheral surface of the other end portion of the annular elastic membrane member.
Circumferentially so as to cover a part of the inner peripheral surface of the annular seal member.
And a plurality of strip-shaped second spring plate members all disposed.
A pressurized fluid is supplied to the fluid storage chamber to elastically deform the annular elastic membrane member toward the inner peripheral side, and the other end of the annular seal member is pressed against the outer peripheral surface of the cylindrical body to seal. It is characterized by having been constituted so that.

An example in which an underground-bonded shield machine is bonded underground will be described as an example. In this case, the shield excavator corresponds to a receiving-side shield excavator, and the tubular body is mounted, for example, in the vicinity of the inside of the front fuselage of the penetrating-side shield excavator so as to be movable in the axial direction. When the pressurized fluid is not stored in the fluid storage chamber of the water stopping device of the receiving shield excavator, the cover member always covers the inner peripheral surface of the annular seal member and protects the annular seal member from contact with earth and sand. Becomes possible. A state in which pressurized fluid is not stored in the fluid storage chamber of the water stop device
Then, the plurality of first spring plate members of the cover member and the plurality of second
An annular sealing member and an annular elastic membrane in cooperation with a spring plate member;
Almost the entire inner circumference of the member can be covered, and the annular seal
The material can be protected from contact with earth and sand.

When the two shield excavators are excavated in the direction of approaching each other and are joined underground, the excavation is stopped by bringing the cutter disks of both shield excavators closer to the approaching and opposing state. In the above, a passage gap of the cylindrical body is formed. Next, the cylinder of the penetrating-side shield excavator is driven to be extruded and partially penetrated into the front end portion of the receiving-side shield excavator, and then pressurized fluid is supplied to the fluid storage chamber of the water stop device. Then, the annular elastic membrane member is elastically deformed to the inner peripheral side, and the other end of the annular seal member is pressed against the outer peripheral surface of the cylindrical body to seal. At this time, the cover member is elastically deformed by being urged inwardly by the elastic deformation of the annular elastic film member. That is, when the pressurized fluid is supplied to the fluid storage chamber,
Due to the elastic deformation of the annular elastic membrane member,
The free end portion of the first spring plate member is large with the annular seal member.
Tilting to allow the plurality of second spring plate members of the cover member to move freely.
The end portion together with the annular elastic membrane member is larger than each first spring plate member.
By tilting slightly, the inner surface side of the annular concave portion is opened.

[0013]

[0014]

[0015]

[0016]

[0017] The water stopping device of the shield machine according to claim 2 is as follows.
The invention according to claim 1 , wherein the cover member is fixed to an inner peripheral surface at one end of the annular seal member, and is connected to a first annular spring plate member connected to the end of the plurality of first spring plate members on the one end side. A second elastic member fixed to the inner peripheral surface of the other end of the annular elastic film member and connected to the other end of the plurality of second spring members.
An annular spring plate member. Therefore, the attachment of the plurality of first annular spring leaf members to the trunk member is simplified, and the attachment of the plurality of second annular spring leaf members to the trunk member is also simplified. That is, a plurality of first spring plate members,
As compared with the case where a plurality of second spring plate members are respectively attached to the body members with bolts or the like, the attachment is significantly simplified.

[0018] The water stopping device of the shield machine according to claim 3 is as follows.
In the invention of claim 2 , the first of the plurality of first spring plate members
The free end portion opposite to the annular spring plate member is disposed on the inner peripheral side of the free end portion on the opposite side of the plurality of second spring plate members from the second annular spring plate member. It is a feature. Therefore, in a state where the pressurized fluid is not stored in the fluid storage chamber, water and earth and sand hardly enter the inner peripheral surface of the annular seal member, and the water stopping performance can be improved.

[0019] The water blocking device of the shield machine according to claim 4 is as follows.
A body member mounted on the outer surface of the body member of the shield machine
The ring between the trunk member and the cylindrical body when the cylindrical body is loosely fitted
In the water stop device for sealing the gap, the outside of the body member
An annular recess formed in the peripheral surface, and an annular recess provided in the annular recess.
An annular elastic membrane member forming a fluid storage chamber on the inner peripheral side;
Disposed in the vicinity of the outer peripheral surface of the annular elastic membrane member and in the axial direction.
An annular shell having one end fixed to the body member and the other end forming a free end
In which the pressurized fluid is not stored in the fluid storage chamber.
Annular seal covering the outer peripheral surface of the annular seal member
An elastically deformable cover member for protecting the member,
Circumferentially so as to cover most of the outer peripheral surface of the
A plurality of strip-shaped first spring plate members all disposed,
Outer peripheral surface of the other end portion of the elastic membrane member and outside of the annular seal member
Strips arranged in the circumferential direction to cover a part of the peripheral surface
And a cover member having a plurality of second spring plate members.
The pressurized fluid is supplied to the fluid storage chamber to form an annular elastic membrane portion.
The material is elastically deformed to the outer peripheral side, and the other end of the annular seal member is
It is configured to seal by pressing against the inner peripheral surface of the cylinder.
It is characterized by the following. This water stop device is
Equipped on the outer surface, the cylinder is loosely fitted to the body
When pressurized to the outside, the pressurized fluid is supplied to the fluid
The elastic seal member is elastically deformed to the outer peripheral side to form an annular seal member.
Is pressed against the inner peripheral surface of the cylindrical body to seal. this
At this time, the cover member is elastically deformed by the annular elastic membrane member.
It is elastically deformed by being urged toward the outer peripheral side. This cover member
The invention according to claim 1, which covers the outer peripheral surface of the annular seal member.
Therefore, the operation is substantially the same as that of the first aspect.
I do.

[0020] The water blocking device of the shield machine according to claim 5 is as follows.
The invention according to claim 4 , wherein the cover member is fixed to an outer peripheral surface of one end of the annular seal member, and is connected to an end on the one end side of the plurality of first spring plate members; A second annular spring plate member fixed to the outer peripheral surface of the other end portion of the annular elastic film member and connected to the other end portions of the plurality of second spring plate members. . The first annular spring plate member and the second annular spring plate member includes a first annular spring plate member of the invention of claim 2, since it is the second one annular spring plate member and essentially equivalent, and claim 2 It has a similar effect.

According to a sixth aspect of the present invention, there is provided a water stopping device for a shield machine.
In the invention of claim 5 , the first of the plurality of first spring plate members has
The free end portion opposite to the annular spring plate member is disposed so as to wrap around the outer peripheral side of the free end portion of the plurality of second spring plate members opposite to the second annular spring plate member. It is assumed that. Therefore, in a state where the pressurized fluid is not stored in the fluid storage chamber, water and earth and sand hardly enter the inner peripheral surface of the annular seal member, and the water stopping performance can be improved.

[0022] The water stopping device of the shield machine according to claim 7 is as follows.
The invention according to any one of claims 1 to 6 , wherein at least the plurality of second spring plate members are each covered with a rubber film. When the pressurized fluid is supplied to the fluid storage chamber to elastically deform the annular elastic membrane member, the rubber membrane can prevent the annular seal member from being damaged or worn.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2,
The underground junction type shield excavator is one in which two shield excavators are excavated in a phase approaching direction to join them together underground, and the outer diameter of the trunk member is the same as the penetration side shield excavator 1A. , A receiving-side shield machine 1B. First, the penetrating shield excavator 1A will be described, then the receiving shield excavator 1B will be described, and then the water stop device 60 provided on the inner surface of the body member will be described.

First, the penetrating-side shield machine 1A will be described. However, the excavation direction will be referred to as the front, and the front, rear, left and right will be referred to as front, rear, left and right. As shown in FIG. 1, the shield machine 1 </ b> A is connected to a cutter disk 2, a chamber 3, a front body 4, a cutter rotation drive mechanism 5 that rotationally drives the cutter disk 2, and a rear end of the front body 4. After the trunk 6, a plurality of shield jacks 7 for generating excavation thrust, an erector device 8 for assembling the segment S to the tunnel pit wall, a mud discharging facility 9, and a front end of the shield excavator 1B for underground joining And a cylindrical body 10 that is loosely fitted inside the portion.

The cutter disk 2 will be described.
The cutter disk 2 includes a center frame 11, for example, four extendable cutter spokes 12 extending radially from the center frame 11, a ring frame 13,
14, an annular outer peripheral ring 15 having the same diameter as the front body 4, and a number of cutter bits attached to the cutter spokes 12.

Each of the cutter spokes 12 includes a fixed cutter spoke 12 a extending from the ring frame 13 to the vicinity of the outer periphery, a hydraulic cylinder 16, and a cutter spoke 12.
And a movable cutter spoke 12b which is driven by a hydraulic cylinder 16 in a radially-reducing direction to form a passage gap for the cylindrical body 10 at the time of underground joining. Then, the movable cutter spoke 12b is radially reduced in diameter by the hydraulic cylinder 16.

A copy cutter 17 is provided on the cylinder body of any one of the four cutter spokes 12 of the hydraulic cylinder 16. The copy cutter 17 includes a hydraulic cylinder 18 and a cutter 19, and a piston of the hydraulic cylinder 18 is provided. The rod is pin-connected to the cylinder body of the hydraulic cylinder 16. A cutter 19 is fixed to the cylinder body of the hydraulic cylinder 18 in a radial direction.
When the extension 8 is extended, the cutter 19 advances to the outer peripheral side of the outer peripheral ring 15.

As shown in FIG. 1, on the rear side of the cutter disk 2, there is provided a partition wall structure 20 which is integrally fixed to the front body 4 with a chamber 3 interposed therebetween. Body 20a, a central wall portion 20b for closing the front end of the cylindrical body 20a, and a cylinder integrally welded and joined to the inside of the front body 4 radially outward from the peripheral edge of the rear end of the cylindrical body 20a. And an opening wall 20c extending to the member 21. An annular frame 22 having an L-shaped cross section is joined over the front surface of the opening wall 20c and the cylindrical member 21, and an annular concave portion is formed between the annular frame 22 and the cylindrical body 20a.

An annular cutter drum 24 is connected to the cutter disk 2 via a connecting member 23, and the cutter drum 24 is rotatably supported by the annular recess through a plurality of bearings and earth and sand seals. A rotary joint 25 is provided at a central portion of the central wall portion 20b, and a center member 26 extending rearward from the cutter disc 2 is provided.
6 is provided with a plurality of oil passages, passages for a muddy agent, and the like. A plurality of oil passages and passages are sequentially connected to the rotary joint 2.
5, through the center member 26 and the cutter spokes 12 to the hydraulic cylinders 16 and 18 and the humidifier supply hole, respectively. Reference numeral 27 denotes a man lock for adapting the worker's body to the reduced pressure.

Next, the cutter rotation driving mechanism 5 will be described. As shown in FIG. 1, the cutter rotation drive mechanism 5
Includes a ring gear 28 provided between the rear end side of the cutter drum 24 and the opening wall 20c, and a plurality of hydraulic or electric cutter drive motors 29 for driving the ring gear 28 to rotate. It is fixed to the cutter drum 24 and is supported on the opening wall 20c via a swivel bearing. A pinion gear is fixed to the motor shaft of each cutter drive motor 29, and this pinion gear meshes with the teeth of the ring gear 28.

Next, the shield jack 7 will be described. A ring web 30 is welded to the inside of the rear end of the front trunk 4, and a plurality of shield jacks 7 that generate excavation thrust during tunnel excavation are directed to the ring web 30 in a front-rear direction and a rod direction rearward. Fixed.
Reference numeral 31 denotes an eccentric fitting, and reference numeral 32 denotes a spreader. At the time of tunnel excavation, a plurality of spreaders 32 take a reaction force at the front end of the segment S lining the inside of the tunnel to generate excavation thrust.

The erector device 8 will be described. The erector device 8 includes a movable frame 33 rotatably supported by a plurality of idler rollers, an erector body 34 attached to the movable frame 33, and a rotating frame 33. It has an electric or hydraulic drive motor 35 for driving.

Next, the sludge discharging equipment 9 will be described. The drainage equipment 9 includes a water supply pipe 36 that sends muddy water into the chamber 3,
A mud pipe 37 for discharging the excavated earth and sand in the chamber 3 to the outside, an agitator 38 for stirring the earth and sand in the chamber 3 and muddy water are provided. The water pipe 36 and the drain pipe 3
Each of the valves 7 is provided with a valve. Muddy water is supplied into the chamber 3 from a water supply system extending from a rear shaft via a water supply pipe 36, and the earth and sand in the chamber 3 are stirred by an agitator 38 to become more dense muddy water. Then, the waste water is discharged to the outside from the rear shaft by the sludge system extending rearward from the sludge pipe 37.

A rear work deck 39 is provided inside the rear trunk 6, and the rear work deck 39 is provided with a perfect circle holding device 40 for keeping the segment S in a perfect circle. Reference numeral 41 denotes a tail grout seal.

Next, the cylinder 10 and its pushing mechanism will be described. As shown in FIG. 1 and FIGS. 6 to 10, the front body 4, the cylindrical member 21, and the annular sealing plate 42 have a front-end-opened cylindrical housing 43 near the inside of the front half of the front body 4. The cylindrical body 10 is disposed concentrically with the front body 4 in the cylindrical body housing portion 43, and the cylindrical body 10 is provided so as to be able to move axially forward in the cylindrical body housing portion 43. Both the inner and outer surfaces of the cylindrical body 10 are sealed by the sealed ring member 44 on the inner surface of the front end of the cylindrical member 21 and the sealed ring member 45 on the inner surface near the front end of the front body 4. Does not flow in.

At a position near the inner periphery of the rear part of the front body 4,
A plurality of push-out jacks 46 are provided for loosely fitting the front end 52 of the receiving side shield excavator 1B into the front trunk 52 of the receiving side shield excavator 1B. When the cylindrical body 10 is extruded by the pushing jacks 46, push rods 46a are provided at the rear end of the cylindrical body 10 so as to face the respective pushing jacks 46 (see FIGS. 8 to 10).
While pushing up the screws sequentially, several extrusion jacks 4
The cylinder 6 is driven to extrude by 6.

Next, the receiving shield machine 1B will be described. However, the excavation direction will be referred to as the front, and the front, rear, left and right will be referred to as front, rear, left and right. The description of the same members as in the penetrating-side shield machine 1A will be omitted as appropriate. As shown in FIG. 2, the shield machine 1 </ b> B includes a cutter disk 50, a chamber 51, a front trunk 52 (corresponding to a trunk member), a cutter rotation drive mechanism 53, and a middle end at the rear end of the front trunk 52. The rear trunk 56, the plurality of shield jacks 57, the erector device 58, the sludge exhaust system 59, and the soil pressure of the ground at the time of underground joining are connected via the bent portion 54 and the plurality of middle folding jacks 55. A water stop device 60 and the like for sealing so as not to flow in are provided.

As shown in FIGS. 2, 6 to 10, the cutter disk 50 is provided with
The telescopic cutter spokes 62, ring frames 63 and 64, an annular outer ring 65, a large number of cutter bits and the like, each cutter spoke 62 includes a fixed cutter spoke 62 a, a hydraulic cylinder 66, A movable cutter spoke 62b driven by a hydraulic cylinder 66 in a radially reducing direction, and the hydraulic cylinder 66 reduces the diameter of the movable cutter spoke 62b in the radial direction during underground joining.

A copy cutter 67 is provided on the cylinder body of any one of the four cutter spokes 62 of the hydraulic cylinder 66. The copy cutter 67 includes a hydraulic cylinder 68 and a cutter 69. The rod is pin-connected to the cylinder body of the hydraulic cylinder 66. A cutter 69 is fixed to the cylinder body of the hydraulic cylinder 68 in the radial direction.
When the extension 8 is extended, the cutter 69 advances to the outer peripheral side of the outer peripheral ring 65.

On the rear side of the cutter disk 50, there is provided a partition structure 70 fixed to the front body 52 with the chamber 51 therebetween. The partition structure 70 is composed of a horizontal cylinder 70a, a central wall 70b, and an opening wall. And a unit 70c.
An annular frame 71 having an L-shaped cross section is joined over the front surface of the opening wall 70c and the front trunk 52, and an annular recess is formed between the annular frame 71 and the cylindrical body 70a.

The cutter disk 50 includes a connecting member 72.
The cutter drum 73 is rotatably supported by the annular concave portion via a plurality of bearings and earth and sand seals. Reference numeral 74 indicates a rotary joint, and reference numeral 75 indicates a center member.
Reference numeral 76 denotes a man lock for adapting the worker's body to the reduced pressure.

As shown in FIG. 2, the cutter rotation drive mechanism 53 includes a ring gear 77 and a cutter drive motor 78. A pinion gear is fixed to the motor shaft of each cutter drive motor 78, and the pinion gear is connected to the ring gear 77.
Meshed with the teeth. A ring web 79 is welded to the inside of the front end of the rear trunk 56, and a plurality of shield jacks 57 are fixed to the ring web 79. Code 8
0 indicates an eccentric fitting, and 81 indicates a spreader.
The erector device 58 includes a movable frame 82 rotatably supported by a plurality of idler rollers, an erector body 83, a drive motor 84, and the like.

The sludge discharging equipment 59 includes a water pipe 85 and a sludge pipe 86.
, An agitator 87 and the like, and valves are interposed in the water supply pipe 85 and the drainage pipe 86, respectively. A rear work deck 88 is provided inside the rear trunk 56, and the rear work deck 88 is provided with a perfect circle holding device 89. Reference numeral 90 indicates a tail grout seal.

Next, the water stopping device 60 for sealing the annular gap between the front trunk 52 of the receiving shield excavator 1B and the cylindrical body 10 of the penetrating shield excavator 1A at the time of underground joining will be described. As shown in FIGS. 2 to 5, a water stop device 60 is provided on the inner surface of the front end of the front trunk 52.
An annular concave portion 91 recessed in the inner peripheral surface portion of the front trunk 52,
An annular elastic membrane member 92, an annular seal member 93, a pressurized water injection mechanism including a pressurized water injection pipe 95a, and a cover member 94.
And

As shown in FIGS. 2 and 3, a flexible annular elastic film member 92 is provided in the annular concave portion 91, and a fluid accommodating chamber 95 is formed on the outer peripheral side thereof. The front end of the annular elastic membrane member 92 is fixed to the front body 52 by a plurality of bolts and annular stoppers 96 arranged at appropriate intervals in the circumferential direction, and the rear end of the annular elastic membrane member 92 is arranged in the circumferential direction. A plurality of bolts and annular stoppers 9 arranged at appropriate intervals
7 is fixed to the front trunk 52.

An annular seal member 93 is provided in the vicinity of the inner peripheral surface of the annular elastic membrane member 92, and the rear end of the annular seal member 93 is secured by a plurality of bolts and an annular stopper 97 to the front body 5.
It is fixed to 2. The annular seal member 93 is composed of a large number of thin elastically deformable elastic plates having a predetermined small width in the circumferential direction, and a large number of elastic plates arranged while partially wrapping in the circumferential direction while being partially wrapped. It has a structure wrapped in a resin material.

Referring to the cover member 94, FIG.
As shown in FIG. 5, the cover member 94 is
In a state where pressurized water as a pressurized fluid is not contained in the annular seal member 93, the annular seal member 9 covers the inner peripheral surface of the annular seal member 93.
In the state where the pressurized water is supplied to the fluid accommodating chamber 95, the annular elastic membrane member 92 is elastically deformed by being urged inward by the elastic deformation of the annular elastic membrane member 92.

As shown in FIG. 4, the cover member 94 includes a first cover 98 and a second cover 99. The first cover 98 is formed by a first annular spring plate member 98a and a plurality of strip-shaped first springs. Plate member 98b, and the second cover 99
It has an annular spring plate member 99a and a plurality of strip-shaped second spring plate members 99b. That is, a ring-shaped first annular spring plate member 98 a is fixed to the inner peripheral surface of the rear end portion of the annular seal member 93 with a plurality of bolts and an annular stopper 97, and the inner peripheral surface of the annular seal member 93. A plurality of strip-shaped first spring plate members 98b arranged in the circumferential direction so as to cover most of
The end on the rear end side is connected to the end on the front end side of the first annular spring plate member 98a. The first annular spring plate member 9
8a may be divided into a plurality in the circumferential direction for convenience of assembly.

A ring-shaped second annular spring plate member 99a is fixed to the inner peripheral surface at the front end of the annular elastic membrane member 92 with a plurality of bolts and an annular stopper 96. Front end portions of a plurality of strip-shaped second spring plate members 99b arranged side by side in the circumferential direction so as to cover the inner peripheral surface of the side portion and a part of the inner peripheral surface of the annular seal member 93, The second annular spring plate member 99a is connected to the end on the rear end side. The second annular spring plate member 99a may be divided into a plurality in the circumferential direction for convenience of assembly.

Of the free end portions of the plurality of first spring plate members 98b, a portion extending from the front end to about 1/3 of the length is a plurality of second spring plate members 98b.
About half of the free end of the spring plate member 99b from the rear end
It is disposed in a state of being wrapped on the inner peripheral side of the portion up to the length. Each of the first and second spring plate members 98b and 99b is made of, for example, a stainless steel plate having a thickness of about 0.3 mm. As shown in FIG. In order to prevent the front end from being damaged or worn, the structure is such that each is wrapped with a rubber film 100.

Next, the operation of the underground joint type shield excavators 1A and 1B and the water stop device 60 described above will be described. As shown in FIG. 6, both shield excavators 1A and 1B
When the excavators are excavated in the phase approaching direction and the front ends of the two are joined underground, the positional relationship between the shield excavators 1A and 1B is known so that their axes are substantially coincident with each other. While checking using the horizontal boring 101, the shield excavator 1A is stopped and the shield excavator 1B is stopped when reaching the joining position shown in FIG. During tunnel excavation, both shield excavators 1
The movable cutter spokes 12b and 62b of A and 1B are in the diameter expanding position.

Next, as shown in FIG. 7, stone blocks, earth blocks and the like in the chambers 3 and 51 of the shield machines 1A and 1B are washed and removed, and muddy water is stored in each of the chambers 3 and 51.
Next, as shown in FIG. 8, both shield machine 1A, 1B
Movable cutter spoke 1 of cutter disk 2, 50
The passage gap of the cylindrical body 10 is formed by reducing the diameter of 2b and 62b. Thereafter, at the rear of the cylindrical body 10, the cylindrical body 10 is extruded and driven by the plural push-out jacks 46 while successively screwing together the push rods 46 a so as to face the plural push-out jacks 46 respectively.

Next, as shown in FIGS. 3 and 8, when pressurized water is supplied from the pressurized water supply source to the fluid storage chamber 95, the annular elastic membrane member 92 is elastically deformed by the pressure of the pressurized water and expands inward. The annular seal member 93 is pressed inward and tilts in a tapered shape, and is pressed against the outer peripheral surface of the cylindrical body 10 from the outside of the cylindrical body 10 to seal the outer surface side of the cylindrical body 10. At this time, the cover member 94 is pressed inward by the elastic deformation of the annular elastic film member 92, and each first spring plate member 98 b tilts integrally with the annular seal member 93, and each second spring plate member 99 b Tilts integrally with the annular elastic membrane member 92.

Next, as shown in FIG. 9, a backfill agent (for example, mortar) is injected between the cylinder 10 and the ground from a backfill agent injection pipe 102 provided inside the front body 4 of the shield machine 1A. Then, the water stop ring 103 is welded and joined to the front body 52 and the cylinder 10 to completely close the space between the front body 52 and the cylinder 10 in a watertight manner. In addition, the tubular body 10 and the ring member 44 of the shield machine 1B are welded and joined to enhance the water stopping performance of both shield machines 1A and 1B. After the underground joining, as shown in FIG. 10, the front trunk 4, the rear trunk 6, and the cylindrical body 10 of the shield machine 1A, the front trunk 52, the rear trunk 56, and the water stopping device 60 of the shield machine 1B are underground. And other internal structural materials and accessories are removed.

As shown in FIGS. 3 to 5, in a state where the pressurized water is not stored in the fluid storage chamber 95 of the water stopping device 60, that is, during tunnel excavation, the plurality of first spring plate members 98b and the plurality of second spring plates In cooperation with the member 99b, it is possible to cover substantially the entire inner periphery of the annular seal member 93 and the annular elastic membrane member 92, and protects the annular seal member 93 from contact with earth and sand. In particular, the free end portions of the plurality of first spring plate members 98b are disposed so as to wrap around the inner peripheral side of the free end portions of the plurality of second spring plate members 99b. Water and earth and sand are less likely to penetrate the peripheral surface, and the water stopping performance can be further improved. Each second spring plate member 9
9b are each wrapped with the rubber film 100, so that the front end of the annular seal member 93 slides against the rubber film 100 when the water stopping device 60 is operated, so that damage and abrasion can be prevented.

Next, an underground junction type shield excavator according to another embodiment and a water stop device 60A thereof will be described with reference to the drawings. The water stopping device 60A is basically different from the water stopping device 60 of the above-described embodiment only in the direction in which the free end portion of the annular seal member is pressed and contacted, so that the description is appropriately omitted, and the underground joint type shield excavator can be simply described. explain. As shown in FIGS. 11 to 16, the underground joint type shield excavator includes a penetrating shield excavator 110 </ b> A and a receiving shield excavator 1.
10B, the outer diameter of the body member of the shield machine 110B is smaller than the outer diameter of the body member of the shield machine 110A, and the shield machine 110B
A is provided.

Next, at the time of underground joining, the shield machine 11
0B front body 114 and the cylindrical body 1 of the shield machine 110A
A water stop device 60A that seals the annular gap between the two will be described. As shown in FIG. 11, the water stop device 60A is
An annular concave portion 191, an annular elastic membrane member 192, an annular seal member 193, a pressurized water injection mechanism including a pressurized water injection pipe 155, and a cover member 194 are provided. Have.

The annular recess 191 is provided with a flexible annular elastic membrane member 192, and the fluid storage chamber 19
5 are formed. The front end of the annular elastic membrane member 192 is fixed to the front body 153 by a plurality of bolts and annular stoppers 196 arranged at appropriate intervals in the circumferential direction, and the rear end of the annular elastic membrane member 192 is arranged in the circumferential direction. It is fixed to the front body 153 by a plurality of bolts and annular stoppers 197 arranged at appropriate intervals.

An annular seal member 193 is provided near the outer peripheral surface of the annular elastic membrane member 192, and the annular seal member 193 is provided.
Is fixed with a plurality of bolts and an annular stopper 197. The annular seal member 193 is composed of a large number of thin elastically deformable elastic plates having a predetermined small width in the circumferential direction, and a plurality of elastic plates arranged while being partially wrapped in the circumferential direction. It has a structure wrapped in a resin material.

The cover member 194 will be described. As shown in FIG.
95 protects the annular seal member 193 by covering the outer peripheral surface of the annular seal member 193 in a state where pressurized water as a pressurized fluid is not stored. When the pressurized water is supplied to the fluid storage chamber 195, the annular elastic membrane member 192 is provided. Is elastically deformed by being urged toward the outer peripheral side by the elastic deformation of.

The cover member 194 is a first cover 198.
And a second cover 199. The first cover 198 includes a first annular spring plate member and a plurality of strip-shaped first spring plate members. The second cover 199 includes a second annular spring plate member. A plurality of strip-shaped second spring plate members. That is, on the outer peripheral surface of the rear end portion of the annular seal member 193, a ring-shaped first annular spring plate member is fixed with a plurality of bolts and an annular stopper 97, and most of the outer peripheral surface of the annular seal member 193 is provided. A plurality of strip-shaped first members arranged in the circumferential direction so as to cover
An end on the rear end side of the spring leaf member is connected to an end on the front end side of the first annular spring leaf member. Note that the first annular spring plate member may be divided into a plurality in the circumferential direction for convenience of assembly.

A ring-shaped second annular spring plate member is fixed to the outer peripheral surface of the front end portion of the annular elastic membrane member 192 by a plurality of bolts and an annular stopper 196.
The front end side ends of a plurality of strip-shaped second spring plate members arranged side by side in the circumferential direction so as to cover the outer peripheral surface of the front end side portion of Part 2 and a part of the outer peripheral surface of the annular seal member 193 are: The second annular spring plate member is connected to the end on the rear end side. The second
The annular spring plate member may be divided into a plurality in the circumferential direction for convenience of assembly.

The portion of the free end portions of the plurality of first spring plate members extending from the front end to about 1/3 length extends from the rear end of the free end portions of the plurality of second spring plate members to approximately 1/2 length. Is wrapped around the outer periphery of the portion. Each of the first and second spring plate members is made of, for example, a stainless steel plate having a thickness of about 0.3 mm. In particular, each of the second spring plate members prevents damage or wear of the front end of the annular seal member 193. Each has a structure wrapped in a rubber film.

When the shield excavators 110A and 110B are joined underground, as shown in FIG. 12, the shield excavators 110A and 110B are advanced in the phase approaching direction so that their axes are substantially coincident with each other. Double shield machine 110A, 110B
To stop. Next, the rear trunk 1 of the shield machine 110A
11 and the uncovered segment S are fixed by a reaction force receiving member 112, and a center bent portion 113 and a front body 114 are fixed.
Are fixed by a fixing member 115. Shield machine 1
The front end portion in the rear trunk 150 of the rear body 10B and the reinforced segment S are fixed by the reaction force receiving member 151, and the center bent portion 15
2 and the front body 153 are fixed by the fixing member 154.

Next, as shown in FIG. 13, the movable cutter spoke 116a of the cutter spoke 116 of the shield machine 110A is reduced in diameter to form a passage gap for the cylinder 117. Thereafter, as shown in FIG. 14, at the rear of the cylindrical body 117, the cylindrical body 117 is extruded and driven by the plural push-out jacks 118 while the penetration pins 118 a are sequentially screwed together so as to face the plural push-out jacks 118, respectively. Then, it is fitted over the front trunk 153 of the shield machine 110B in a loose fitting manner.

Next, as shown in FIG. 15, when pressurized water is supplied from the pressurized water supply source to the fluid storage chamber 195 via the pressurized water injection pipe 155, the annular elastic membrane member 192 is elastically deformed by the water pressure of the pressurized water. The ring-shaped sealing member 193 expands outward, is pressed outward, and tilts in a tapered shape. The ring-shaped sealing member 193 is pressed against the inner peripheral surface of the cylindrical body 117 from the inside of the cylindrical body 117, and the inner peripheral surface of the cylindrical body 117 is sealed. At this time, the cover member 194 is pressed to the outer peripheral side by the elastic deformation of the annular elastic film member 192, and each first spring plate member is
3, and each second spring plate member tilts integrally with the annular elastic membrane member 193.

Next, as shown in FIG. 16, after the cutter disks of the shield excavators 110A and 110B are disassembled and removed, the water stop ring 156 is attached to the shield excavator 110A.
B is welded to the front end of the front body 153 and the cylinder 117 to completely seal the space between the front body 153 and the cylinder 117 in a watertight manner. Further, the cylindrical body 117 and the ring member 119 of the shield machine 110A are welded to each other, and both shield machines 110A, 110A are connected.
Improves the water stopping performance of 10B. After underground bonding, the front trunk 114, the rear trunk 111, and the cylindrical body 117 of the shield machine 110A, and the front trunk 1 of the shield machine 110B, as in the above embodiment.
The 53, the rear body 150, the water stop device 60A and the like are left underground, and other internal structural materials and attached devices are removed.

In a state where the pressurized water is not stored in the fluid storage chamber 195 of the water stopping device 60A, that is, when the tunnel is excavated,
The plurality of first spring plate members and the plurality of second spring plate members cooperate to cover substantially the entire outer periphery of the annular seal member 193 and the annular elastic membrane member 192, and the annular seal member 19
Protect 3 from touching earth and sand. In particular, multiple first
Since the free end portions of the spring plate members are disposed so as to wrap around the free end portions of the plurality of second spring plate members, it is difficult for water and earth and sand to enter the outer peripheral surface of the annular seal member 193. And the water stopping performance can be further improved. Other operations and effects substantially similar to those of the water stop device 60 are achieved.

According to the water stop device 60 of the shield machine 1B described above, the cover member 94 always covers the inner peripheral surface of the annular seal member 93 when the pressurized water is not stored in the fluid storage chamber 95 of the water stop device 60. It becomes possible to cover and protect the annular seal member 93 from contact with earth and sand. Therefore, the annular sealing member 93 is not damaged or worn by friction with earth and sand during normal shield excavation, and the water stopping function can be reliably ensured.

The cover member 94 is elastically deformed by being urged inward by the elastic deformation of the annular elastic membrane member 92 to open the inner surface side of the annular concave portion 91. , A plurality of hydraulic cylinders for driving the protection cylinder member backward, and earth and sand seals for improving the water stopping performance between the protection cylinder member and the annular concave portion are not required.

When pressurized water is supplied to the fluid accommodating chamber 95, the free end portions of the plurality of first spring plate members 98b are largely tilted together with the annular seal member 93 due to the elastic deformation of the annular elastic membrane member 92, and the plurality of second spring members are formed. The free end portion of the plate member 99b is tilted smaller than each of the first spring plate members 98b together with the annular elastic membrane member 92 to open the inner surface side of the annular concave portion 91, so that an actuator such as a hydraulic cylinder is not provided. The inner surface side of the annular concave portion 91 can be reliably opened. The mounting is significantly simplified as compared with the case where the plurality of first spring plate members and the plurality of second spring plate members are respectively mounted on the body member with bolts or the like.

Next, a modified embodiment in which this embodiment is partially modified will be described. 1) The water stop devices 60 and 60A can be applied to devices other than the water stop device of the underground junction type shield machine. 2) The cylinder 10 and the water blocking ring 102, and the cylinder 10 and the ring member 44 are respectively welded and joined, and the backfilling agent is
And may be injected into the ground. 3) The plurality of first spring plate members 98b may be directly fixed to the inner peripheral surface of the annular seal member 93, respectively. The plurality of second spring plate members 99b may be directly fixed to the inner peripheral surface of the annular elastic film member 92, respectively. 4) The plurality of first spring plate members 98b are
Similarly to the case of 9b, the structure may be wrapped with a rubber film. In addition, without departing from the spirit of the present invention, it is possible to implement the above-described embodiment with various modifications.

[0073]

According to the first aspect of the present invention, when the pressurized fluid is not stored in the fluid storage chamber of the watertight device, the cover member always covers the inner peripheral surface of the annular seal member. In addition, the annular seal member can be protected from contact with earth and sand. Therefore, during normal shield excavation, the annular seal member does not rub against earth and sand and is not damaged or worn, so that the water stopping function can be reliably ensured.

For example, when the receiving-side shield excavator and the penetrating-side shield excavator are excavated in the approaching direction and are joined underground, the cylinder is partially inserted into the front end of the receiving-side shield excavator. Then, pressurized fluid is supplied to the fluid storage chamber of the water stopping device to elastically deform the annular elastic membrane member toward the inner peripheral side, and the other end of the annular seal member is pressed against the outer peripheral surface of the cylindrical body. Can be sealed.

[0075] At this time, by the elastic deformation of the ring-like elastic membrane member, a plurality of free end portions of the first spring plate member of the cover member
A plurality of second spring plates are tilted greatly together with the annular seal member.
The free end portion of the member is provided with each first spring plate together with the annular elastic membrane member.
By tilting smaller than the member, the inner surface of the annular recess
Since it is open, an actuator such as a hydraulic cylinder
Make sure to open the inner surface of the annular recess without providing
Can be. Therefore, as in the conventional publication, a protection cylinder member for protecting the annular seal member, a plurality of hydraulic cylinders for driving the protection cylinder member backward, and a water stopping performance between the protection cylinder member and the annular recess are improved. There is no need for earth and sand seals.
Therefore, the number of parts is reduced, the structure of the water stop device is simplified, and the production cost can be reduced. In addition, since the protective cylinder member can be omitted, the operation process of underground joining can be simplified.

[0076]

[0077]

[0078] According to the water stopping device of the shield machine according to claim 2, attachment to body member of the first annular spring plate member can be simplified and also simplifies mounting of the body member of the second annular spring plate member . That is, as compared with the case where the plurality of first spring plate members and the plurality of second spring plate members are respectively attached to the body member with bolts or the like, the attachment is significantly simplified. The other effects are the same as those of the first aspect .

[0079] According to the water stopping device of the shield machine according to claim 3, in a state where no housing the pressurized fluid in the flow body accommodating chamber becomes the inner peripheral surface of the annular sealing member is water or sediment easily enter,
Water stopping performance can be improved. Other effects are the same as those of the second aspect . 5. A water stop device for a shield machine according to claim 4.
For example, according to the two shielded excavators on the receiving side and the
Excavation in the direction of approach
When combining, pressurized fluid is stored from a pressurized water supply
When supplied to the chamber, the annular elastic membrane member is pressed by the water pressure of the pressurized fluid.
Elastically deforms and expands outward, and the annular seal member moves outward.
It is pressed and tilts in a tapered shape, and the cylinder
The inner peripheral surface is pressed against the inner peripheral surface to seal the inner peripheral surface of the cylindrical body. this
At this time, the plurality of first leaf spring members of the cover member and the plurality of second leaf spring members
The outer periphery of the leaf spring member is caused by the elastic deformation of the annular elastic membrane member.
Side to elastically deform and open the outer surface of the annular recess.
You. This cover member covers the outer peripheral surface of the annular seal member.
In that it differs from the cover member of claim 1 only in that
An effect similar to that of claim 1 is achieved.

[0080] According to the water stopping device of the shield machine according to claim 5, these first annular spring plate member and the second annular spring plate member includes a first annular spring plate member of the invention of claim 2, the second annular Since it is basically equivalent to the spring plate member, the same effect as that of the second aspect is obtained. The other effects are the same as those of the fourth aspect .

According to the water stopping device of the shield machine according to the sixth aspect , the free end portions of the plurality of first spring plate members on the opposite side to the first annular spring plate member are the second ends of the plurality of second spring plate members. (2) Since it is arranged so as to be wrapped around the outer peripheral side of the free end portion on the opposite side to the annular spring plate member, when the pressurized fluid is not stored in the fluid storage chamber, water or Sediment hardly penetrates, and the water stopping performance can be further enhanced. The other effects are the same as those of the fifth aspect .

According to the water stopping device of the shield machine according to claim 7 , since at least the plurality of second spring plate members are each covered with the rubber film, the pressurized fluid is supplied to the fluid storage chamber. When the annular elastic member is elastically deformed, the rubber seal can prevent the annular seal member from being damaged or worn. Other effect similar to those of one of claims 1 to 6.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a penetration-side shield excavator of an underground junction type shield excavator according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional side view of a receiving-side shield machine.

FIG. 3 is an enlarged cross-sectional view of a main part, illustrating a state of the water stopping device during excavation and a water stopping state.

FIG. 4 is an end view taken along the line IV-IV of the water stop device in a state of excavation.

FIG. 5 is an enlarged sectional view of a second spring plate member.

FIG. 6 is an explanatory diagram of an operation at a first stage in an underground joining preparation state.

FIG. 7 is an operation explanatory view of a second stage in a ground bonding preparation state.

FIG. 8 is an operation explanatory view of a movable cutter spoke in a reduced diameter state, a cylindrical body penetrating state, and an operation state of a water stop device.

FIG. 9 is an operation explanatory diagram in a state where underground joining is completed.

FIG. 10 is an operation explanatory view of a state where parts and the like in both shield excavators are removed.

FIG. 11 is an enlarged cross-sectional view of a main part explaining a state of a water stopping device and a water stopping state of a water stopping device of a shield machine according to another embodiment.

FIG. 12 is an operation explanatory view of the receiving-side shield excavator and the penetrating-side shield excavator in an underground joining preparation state.

FIG. 13 is an explanatory diagram of the operation of the movable cutter spoke of the penetrating side shield excavator in a reduced diameter state.

FIG. 14 is an operation explanatory view of a state in which the cylindrical body is externally fitted to the body member.

FIG. 15 is an operation explanatory view of an operation state of the water stop device.

FIG. 16 is an explanatory diagram of an operation in a state where underground joining is completed.

[Explanation of symbols]

 1B, 110B Shield excavator 10, 117 cylindrical body 52, 153 front body 60, 60A water stopping device 91, 191 annular concave portion 92, 192 annular elastic membrane member 93, 193 annular seal member 94, 194 cover member 95, 195 fluid storage Chamber 98a First annular spring plate member 98b First spring plate member 99a Second annular spring plate member 99b Second spring plate member

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Soichiro Ueda 9-1-30, Wakamatsucho, Nagata-ku, Kobe-shi Ryoku Rubber Co., Ltd. (72) Inventor Keiji Suno 9-1-1, Wakamatsucho, Nagata-ku, Kobe-shi No. 30 in Rikkyo Rubber Co., Ltd. (56) References JP-A-8-93390 (JP, A) JP-A-9-32484 (JP, A) JP-A-11-303570 (JP, A) JP-A-4 −83095 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 11/00 E21D 9/06 301

Claims (7)

(57) [Claims] 1. A water stopping device which is provided on an inner surface of a body member of a shield machine and seals an annular gap between the body member and the cylinder when the cylinder is loosely fitted inside the body. An annular concave portion provided in the inner peripheral surface of the body member; an annular elastic film member provided in the annular concave portion and forming a fluid storage chamber on the outer peripheral side; An annular seal member disposed and one end in the axial direction fixed to the body member and the other end forming a free end; and covering an inner peripheral surface of the annular seal member in a state where the fluid storage chamber does not store the pressurized fluid. Te a cover member elastically deformable to protect the annular seal member, circumferentially to cover a large portion of the inner peripheral surface of the annular sealing member
A plurality of strip-shaped first spring plate members arranged side by side;
Of the inner peripheral surface of the other end portion of the
Short wires arranged side by side so as to cover a part of the inner circumferential surface
A cover member having a plurality of book-shaped second spring plate members, and supplying a pressurized fluid to the fluid storage chamber to elastically deform the annular elastic membrane member toward the inner periphery side, and the other end of the annular seal member A water stopping device for a shield machine, wherein a portion is pressed against an outer peripheral surface of a cylindrical body to be sealed. 2. A first annular spring plate member fixed to an inner peripheral surface of one end of an annular seal member and connected to an end of the plurality of first spring plate members on the one end side; A plurality of second elastic members fixed to the inner peripheral surface at the other end of the elastic membrane member;
The water stopping device for a shield machine according to claim 1 , further comprising a second annular spring plate member connected to an end of the spring plate member on the other end side. 3. A free end portion of the plurality of first spring plate members opposite to the first annular spring plate member is a free end portion of the plurality of second spring plate members opposite to the second annular spring plate member. The battery is disposed so as to be wrapped on the inner peripheral side.
3. The water stopping device for a shield machine described in 2 . 4. An outer surface of a body member of a shield machine.
Body member when the tubular body is loosely fitted to the body member
In the water stopping device for sealing an annular gap between the cylinder member and the cylindrical body, an annular concave portion formed in the outer peripheral surface portion of the body member, and a fluid storage chamber provided in the annular concave portion on the inner peripheral side.
An annular elastic membrane member , disposed near the outer peripheral surface of the annular elastic membrane member,
One end is fixed to the body member and the other end is a free end.
A seal member and a ring in a state where the fluid storage chamber does not store the pressurized fluid.
To protect the annular seal member by covering the outer peripheral surface of the annular seal member
Elastically deformable cover member, which is circumferentially covered so as to cover most of the outer peripheral surface of the annular seal member.
A plurality of strip-shaped first spring plate members arranged side by side;
Between the outer peripheral surface of the other end portion of the
Short wires arranged side by side in the circumferential direction to cover part of the outer peripheral surface
A cover member having a plurality of book-shaped second spring plate members;
And supplying a pressurized fluid to the fluid storage chamber to form an annular elastic membrane member.
It is elastically deformed to the outer peripheral side, and the other end of the annular seal member is cylindrical.
That the inner peripheral surface of the
A special feature of a shield excavator. 5. A first annular spring plate member fixed to an outer peripheral surface of one end of an annular seal member and connected to ends of the plurality of first spring plate members on the one end side, an annular elastic member. A plurality of second members fixed to the outer peripheral surface of the other end of the membrane member
The water stopping device for a shield machine according to claim 4 , further comprising a second annular spring plate member connected to an end of the spring plate member on the other end side. 6. A free end portion of the plurality of first spring plate members opposite to the first annular spring plate member is a free end portion of the plurality of second spring plate members opposite to the second annular spring plate member. The battery is provided so as to be wrapped on the outer peripheral side.
6. The water stopping device of the shield machine according to 5 . 7. At least claim 1, wherein the plurality of second spring plate member is covered with a respective rubber layer
7. The water stopping device for a shield machine according to any one of items 6 to 6 .