JPH0220795A - Sealing device for aperture - Google Patents

Abstract

PURPOSE:To aim at the certainty of sealing by providing an elastic deformable sealant with a hole for receiving a hollow body, an expanding body for pressing the part around the hole to the peripheral surface of the hollow body and a fixture for fixing these to the mine wall. CONSTITUTION:A tubular shield main body and a cutter built-up body rotatably disposed around the shaft line of the main body are provided to a drilling machine which is advanced drilling the facing surface. A circular sealant 40 made of a plate such as an elastic rubber plate is provided in a sealing device 30 and is made to be larger than the shield main body in the outer diameter. A hole 42 with the smaller diameter than the outer diameter of the shield main body is further formed at the central part of the sealant 40, and at its outer peripheral part, a ring keep plate 44 is fixed to a ring fixture 50 as well as the position of the sealant 40 is transited with the advance of the drilling machine 32. As a result, the sealant 40 is pressed at the outer surface of a pile wall 36 so as to seal between a mine wall 36.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a sealing device used in tunnel excavation methods, press-in type pipe propulsion methods, etc., and in particular, the present invention relates to sealing devices used in tunnel excavation methods, press-in type pipe propulsion methods, etc. The present invention relates to a sealing device arranged to seal between the tunnel wall and a hollow body such as a shield tunneling machine, a propulsion pipe, or a lining received in a starting or reaching opening formed in the tunnel wall.

(Prior art) In an excavation method for constructing a tunnel or laying a pipeline using a shield type tunneling machine, excavated soil or groundwater is used to connect the excavation machine to a tunnel wall having an opening such as a starting or arriving port. A sealing device is arranged on the shaft wall to prevent leakage into the shaft between the shaft and the lining that follows behind the tunnel wall and the tunnel machine. Further, this type of sealing device is also arranged in a pipe propulsion construction method in which a propulsion tube is press-fitted into the ground from a shaft so as to seal between the propulsion tube and the mine wall.

As one of this type of sealing device, Fig. 21 and 2
There is a sealing device 10 shown in FIG.

This sealing device 10 includes a shield type tunnel boring machine 12.
The sealing material 16 includes an annular sealing material 16 having a circular hole 14 having a diameter smaller than the outer diameter of the ring, and a plurality of metal fittings 18 made of rectangular metal plates.

The sealing material 16 is attached to the anchor bolt 24 and the nut 2 screwed thereto so that the axis of the circular hole 14 coincides with the axis of the starting opening 22 formed in the shaft wall 20 of the shaft.
6 and attached to the pit wall 20. Each metal fitting 18 is
It has an elongated hole 28 and is attached to the mine wall 20 by anchor holes 24 and nuts 26 passing through the elongated hole 28 at equal angular intervals around the opening 22.

When the excavator is propelled, the sealing material 16 is bent forward in the direction of propulsion by the excavating machine 12, as shown by the two-dot chain line in FIG. comes into contact with the outer peripheral surface of the excavator 12 due to the elasticity of the sealing material 16 itself. As a result, the space between the shaft wall 20 and the tunneling machine 12 is sealed, and excavated material, ground water, etc. are prevented from flowing into the shaft from the opening 22.

As the excavator 12 is further propelled, the inner circumferential edge of the sealing material 16 abuts the outer circumferential surface of a lining, such as a lining segment that continues behind the excavator 12 . By the way, sealing material 1
6, large earth water pressure from excavated earth and sand, groundwater, etc. acts. Further, the outer diameter of the lining is smaller than that of the excavator 12, and the contact area between the sealing material 16 and the lining is smaller than that of the excavator 12.
and tunneling machine 12. Therefore, the sealing material 16
When the metal fittings 18 and the lining come into contact with each other, each metal fitting 18 is moved toward the lining until the tip of the entire prefecture 18 comes into contact with the outer peripheral surface of the lining. Thereby, each metal fitting 18 supports the sealing material 16 on its back surface so that the sealing material 16 can maintain a bent state and resist earth water pressure.

(X!!! Problem that the invention tries to solve> However, metal fittings 1
8 is moved by hitting them all at once, which not only requires a large number of people, but if there is a time delay when moving the metal fittings 18, there is a risk that the sealing of the opening 22 will be incomplete.

Therefore, an object of the present invention is to provide a sealing device that can reliably seal between a member defining an opening and a hollow body.

A sealing device of the present invention includes an elastically deformable sealing material having a hole capable of receiving a hollow body, and an expandable body that can be expanded by a fluid when the sealing device is expanded. The invention includes an expansion body that presses at least a portion of the seal material around the hole against the outer peripheral surface of the hollow body, and a fixture that fixes the expansion body and the seal material to the shaft wall.

In one embodiment of the present invention, the sealing material includes an elastically deformable annular plate having the hole. In the case of this sealing device, the expansion body is attached to the mounting (=J tool) so as to be located on one side in the thickness direction of the plate material and to extend along an imaginary annular line around the hole. In addition, the fixture fixes the plate material to the mine wall so that a portion of the plate material around the hole is elastically deformed by the hollow body toward the inside of the expansion body. When the plate material is deformed and the inflatable body is expanded, the body obtains a reaction force on the fixture and presses the portion of the plate material toward the outer peripheral surface of the hollow body.

In another embodiment of the present invention, the sealing material includes an elastically deformable annular plate having the hole. In the case of this sealing device, the expansion body is attached to the plate material so as to be located on one side in the thickness direction of the plate material and extend along an imaginary annular line around the hole. Further, the fixture fixes the plate material to the shaft wall such that a portion of the plate material around the hole is elastically deformed by the hollow body toward the inside of the expansion body. As a result, when the plate material is deformed and the expandable body is expanded, the expandable body obtains a reaction force on the fixture and presses the portion of the plate material toward the outer circumferential surface of the hollow body. .

In yet another embodiment of the present invention, the inflatable body is attached to the fixture so as to extend along an imaginary annular line around the hole, and the seal material is disposed on an inner surface of the inflatable body. ing. In the case of this sealing device, the plurality of elastic members are attached to the fitting so as to be located on the rear side in the direction of propulsion of the hollow body with respect to the expansion body and protrude toward the center of the expansion body, and Preferably, the device further includes a plurality of elastic members disposed along the inflatable body.

In an embodiment of the present invention, the expansion body is an annular tube extending along an imaginary line around the hole, or
Preferably, the tube includes a plurality of tubes extending along an imaginary line around the hole. When the expansion body includes a plurality of tubes, adjacent tubes may or may not be connected to each other.

When using an inflatable body that includes an annular tube or a plurality of tubes arranged annularly, the fitting includes an annular fixing portion that fixes a portion of the sealing material outside of a portion of the inflatable body; It is preferable that the sealing member has an annular recess extending along the fixing portion, the recess opening on the central axis side of the sealing member so as to receive the tube when the member is deformed.

(Operations and Effects of the Invention) During excavation, a working fluid having a predetermined pressure, such as gas or liquid, is supplied to the expansion body, and the expansion body is expanded. As a result, until the excavation machine passes the position of the sealing material, the sealing material is strongly pressed against the outer circumferential surface of the excavation machine by the expansion body, and the sealing material is strongly pressed against the outer circumferential surface of the excavation machine by the expansion body, and there is a gap between the member that defines the opening and the excavation machine received in the opening. is liquid-tightly sealed.

As the excavator is propelled, the excavator passes through the position of the sealing material. Then, the sealing material is strongly pressed against the outer surface of the lining that follows the excavator, and the space between the member defining the opening and the lining is liquid-tightly sealed.

When the hollow body is a propulsion tube, the expansion body is expanded during excavation to strongly press the sealing material against the outer peripheral surface of the propulsion tube. Thereby, a liquid-tight seal is established between the member defining the opening and the tunnel excavator received in the opening.

Therefore, according to the sealing device of the present invention, it is possible to reliably seal between the member defining the opening and the hollow body.

According to the sealing device of claims (2) to (4), since the expanding body exerts a reaction force on the fitting, the space between the member defining the opening and the hollow body is sealed more reliably.

According to the sealing device of claim (5), the elastic member is bent forward in the direction of movement of the elastic member by the movable hollow body, so that the - section of the elastic member is disposed between the sealing material and the hollow body. . This prevents the sealing material from being worn out or damaged due to movement of the hollow body relative to the sealing material.

According to the sealing device of claim (6), the tube is expanded so as to tighten the sealing material, so that the sealing material is pressed against the excavator and the lining over the entire outer circumferential direction of the hollow body.

According to the sealing device of claim (7), the sealing material is pressed against the hollow body by each tube over the entire outer circumferential direction of the hollow body.

Also in the sealing device of claim (8), since each tube is expanded so as to tighten the sealing material, the sealing material is pressed against the hollow body over the entire outer circumferential direction of the hollow body.

According to the sealing device of claim (9), the direction of expansion of the tube is regulated by the recess of the fitting in the direction of the central axis of the opening [1, that is, in the direction of tightening the sealing material.

(Example) Embodiments of the present invention shown in the drawings will be described below.

The sealing device 30 shown in FIGS. 1 to 4 is applied to a reaching opening 38 formed in a shaft wall 36 of a reaching shaft 34 for a shield type tunneling machine 32. In the illustrated example, the opening 38 has a circular cross-sectional shape, but it may have a polygonal,
It may have other cross-sectional shapes such as an eyebrow shape, an oval shape, an ellipse shape, and a spectacle shape.

The excavator 32 includes a cylindrical shield main body and a cutter assembly disposed at the front of the main body so as to be rotatable around the axis of the main body, and is moved forward while excavating a face surface with the cutter assembly. This is a known device. The excavator 32 may be propelled by a plurality of jacks (not shown) that obtain reaction force from a lining (not shown) placed behind it, or by a main pusher placed in the starting shaft. It may be carried out through the lining by means of a device (not shown).

r? i The lining includes a segment ring obtained by assembling a plurality of lining segments on the excavation site by the excavation machine 32, a lining wall constructed from cast-in-place concrete placed on the excavation site, and the original lining. It consists of a pipe or the like that is pushed into the excavation site by a pushing device.

The sealing device 30 includes an annular sealing material 40 made of a plate material such as an elastic rubber plate. The sealing material 40 has an outer diameter larger than the outer diameter of the shield body of the excavator 32. A hole 42 having a diameter smaller than the outer diameter of the shield body is formed in the center of the sealing material 40. As shown in the third tone and FIG.
0 has an annular presser plate 44 at its outer peripheral edge;
It is fixed to an annular fixture 50 by a plurality of bolts 46 and a plurality of nuts 48 . The holding plate 44 is the sealing material 4
It extends along the outer peripheral edge of 0.

The fitting 50 includes a short cylindrical portion 52 having an inner diameter approximately the same as the inner diameter of the opening 38, a first outward flange portion 54 extending outward from one end of the cylindrical portion 52, and a cylindrical portion 52. 5
an inward second flange portion 5 extending inward from the other end of the second flange portion 5;
6 and an inwardly directed third flange portion 58 extending inwardly from the tubular portion 52 between the first and second flange portions 54,56.

The first flange portion 54 has a diameter larger than the diameter of the opening 38 . Second and third flange portions 56
．． 58 has an inner diameter that is larger than the outer diameter of the shield body and has an outer diameter that is approximately the same as the outer diameter of the sealing material 40 .

The sealing material 40 is fixed to the surface of the third flange portion 48 on the side opposite to the second flange portion 46 so that the central axis of the hole 42 coincides with that of the fixture 50. Note that the outer diameter dimension of the sealing material 40 is the same as that of the second and third flange portions 56.
．． It may be smaller than that of 58.

The tubular portion 52 and the second and third flange portions 56,58 of the fitting 50 define an inwardly opening annular recess 60. An annular expansion body 62 is accommodated in the recess 60 . The inflatable body 62 is made of a member such as a rubber tube or a rubber bag that can be inflated by a working fluid such as gas, liquid, or slurry, and is fixed to the fixture 50 with a hook-and-loop fastener adhesive, screws, or the like. has been done.

The expansion body 62 has a working fluid supply/discharge port 64, and in the illustrated example, the supply/discharge port 64 penetrates the cylindrical portion 52 of the fitting 50 to the outside thereof. The supply/discharge port 64 functions as both a supply port and a discharge port when the working fluid needs to be discharged.

However, when a hardening slurry such as mortar is used as the working fluid, it acts only as a feed port.

In the illustrated example, the inflation body 62 is an annular tube, but instead of this, a plurality of tubes or bags sequentially arranged in the recess 60 may be used. In this case, it is preferable to connect adjacent tubes or bags to each other.

Rubber material for the tube and bag as the inflatable body 62;
The rubber material used as the sealing material 40 is preferably a proproprene-based rubber material, and particularly preferably a broloprene-based rubber material reinforced with fibers.

The sealing device 30 includes a first flange portion 54 of the fitting 50.
At a plurality of locations, the axis of the hole 42 of the sealing material 40 is opened and coincides with that of the hole 138, and the expansion body 62 is It is fixed to the pit wall 36 so as to be in front of the sealing material 40 in the direction of propulsion of the excavator 32 .

As shown in FIG. 3, the expander 62 is deflated until the excavator 32 reaches the position of the sealing material 40. As shown in FIG. When the excavator 32 is propelled from the position shown in FIG. 3, as shown in FIG. be pushed and bent.

When the inner peripheral edge of the sealing material 40 is pressed and bent, high-pressure working fluid is supplied to the supply/discharge port 64 of the expansion body 62 . As a result, the inflatable body 62 is inflated, and the inner peripheral edge of the inflatable body 62 protrudes from the recess 60. As a result, the inner circumferential edge of the sealing material 40 is pressed against the outer circumferential surface of the shield body by the expansion body 62, thereby sealing between the shield body and the shaft wall 36.

The expansion body 62 is maintained in an expanded state by the working fluid until the excavation by the excavator 32 is completed. To maintain the expansion body 62 in an expanded state, working fluid may be constantly supplied to the expansion body 62, or working fluid may be supplied to the expansion body 62 until the expansion body is expanded to a predetermined state. Then, the supply/discharge port 64 may be closed. In the latter case, it is preferable to arrange a valve and a pressure gauge at the supply/discharge port 64.

The direction in which the expandable body 62 expands is regulated by members 62, 66, and 68 that define the recess 60. That is, the expansion body 62 mainly expands toward the excavator 32 and also generates a reaction force on the fixture 50 to press the inner circumferential edge of the sealing material 40 toward the shield body. As a result, the inner circumferential edge of the sealing material 40 is reliably pressed against the outer circumferential surface of the shield body, thereby liquid-tightly sealing the space between the shield body and the pit wall 36.

When the excavator 32 is moved forward from the position of the sealing material 40, the inner peripheral edge of the sealing material 40 is pressed by the expansion body 62 against the outer peripheral surface of the lining that continues behind the excavating machine 32, and the lining and the shaft are separated. The gap with the wall 36 is sealed.

The sealing device 30 may be removed from the shaft wall 34 after excavation is completed. However, after the excavation by the excavator 32 is completed, the expansion body 62 is contracted, and a hardening fluid such as mortar is injected into the expansion body 62 to expand the expansion body 62 and the fluid is hardened. If a fluid is used as the working fluid from the beginning and is cured, the expansion body 62 can be maintained in an expanded state. Further, the inflatable body 62 may be inflated in advance.

According to the sealing device 30, since the inflatable body 62 is an annular tube, the inflatable body 62 is inflated to tighten the sealing material 40, so that the sealing material 40 covers the entire outer circumferential direction of the shield body and lining. Pressed against the main body and lining.

5-8, another sealing device 70 is shown for application to an opening 38 formed in a shaft wall 36 of a access shaft 34 for a shielded tunneling machine 32. Seal device 70 basically includes the same components as in seal device 30 , namely sealing material 40 , retainer plate 44 , bolt 46 , nut 48 , fitting 50 , and expansion body 72 .

Holding plate 44, bolt 46, nut 48, and fixture 50
is the same as that in the sealing device 30. The expansion body 72 has a structure similar to the warp in the sealing device 30, but is located at the inner peripheral edge of the sealing material 40 and
It is attached to the front side surface in the direction of travel by a hook-and-loop fastener, adhesive, or the like. The supply/discharge lower 4 for working fluid is arranged inside the expansion body 72 .

The sealing device 70 is attached to the first flange portion 54 of the fitting 5o.
anchor bolts 66 and nuts 68 at multiple locations.
As a result, the axis of the hole 42 of the sealing material 4o is aligned with the opening 38, and the expansion body 72 is moved against the sealing material 40 by the excavator 3.
It is fixed to the pit wall 36 so as to be forward in the direction of propulsion.

As shown in FIG. 7, the expander 72 is deflated until the excavator 32 reaches the position of the seal 40. As shown in FIG. When the excavator 32 is propelled from the position shown in FIG. 7, as shown in FIG. As a result, the expansion body 72 is pushed into the fitting 5.
0 recess 60. In the case of this sealing device 70 as well, the inflatable body 72 may be inflated in advance.

When the expansion body 72 is received in the recess 60, high-pressure working fluid is supplied to the expansion body 72 and the expansion body 72 is expanded. Pressed against the surface. As a result, the space between the shield body and the pit wall 36 is sealed. When the excavator 32 is moved forward from the position of the sealing material 4o, the sealing material 4
The inner circumferential edge of o is pressed against the outer circumferential surface of the lining continuing behind the excavator 32 to seal between the lining and the shaft wall 36.

9 to 12 show a shield type tunnel boring machine 32.
The opening 3 formed in the shaft wall 36 of the reaching shaft 34 for
A further sealing device 76 is shown which is applied to 8. The seal device 76 includes a fitting 50, an expansion body 62,
An endless belt-shaped sealing material 78 made of an elastic material such as rubber
and a plurality of cushioning materials 80 made of an elastic material.

Fitting 50 and expansion body 62 are identical to those in seal device 30. The sealing material 78 is attached to the inner circumferential surface of the expansion body 62 with a hook-and-loop fastener, adhesive, etc. so that the sealing material forms a 682 for receiving the excavator 32. In the illustrated example, each cushioning material 80 is made of a rectangular thin elastic plate, and is attached to the third flange portion 58 of the fixture 5o at equal angular intervals by an annular retaining plate 83, bolts 84, and nuts 85. installed. The presser plate 83 extends along the third flange portion 58.

Note that instead of the plate-shaped cushioning material 80,
As in a sealing device 86 shown in FIG. 4, a linear cushioning material 88 such as a metal wire such as piano wire or a monofilament made of synthetic resin may be used. In addition, the holding plate 83 and the bolt 84
Instead of using the nuts 85, the cushioning material 80.88 may be attached to the third flange portion 58 by welding.

Furthermore, instead of the endless belt-shaped sealing material 78, a plurality of small pieces of sealing material may be adhered to the inner surface of the expansion body 62, and these pieces may be used as the sealing material.

The sealing device 76 is attached to the first flange portion 54 of the fitting 50.
anchor bolts 66 and nuts 68 at multiple locations.
Therefore, the axis of the 682 of the sealing material 78 coincides with that of the opening 38, and the expansion body 62 and the sealing material 78 are aligned with the cushioning material 8.
0, the mine wall 3 is located in front of the tunneling machine 32 in the direction of propulsion.
It is fixed at 6.

As shown in FIG. 11, the expansion body 62 is deflated until the excavator 32 reaches the position of the sealing material 78. When the excavator 32 is moved to the position of the sealing material 78 as shown in FIG. 12, the cushioning material 80 is pushed forward by the excavator 32 in the direction of propulsion of the excavator.

When the cushioning material 80 is pressed and bent, working fluid is supplied to the expansion body 62. As a result, the expansion body 62 is expanded, so that the inner peripheral surface of the sealing material 78 is covered by the cushioning material 8.
0 to the outer peripheral surface of the shield body. As a result, the space between the shield body and the pit wall 36 is sealed. When the excavator 32 is moved forward from the position of the sealing material 78,
The inner circumferential surface of the sealing material 78 is pressed against the outer circumferential surface of the lining continuing behind the excavator 32 via the cushioning material 80, and the lining and the shaft wall 3 are pressed together.
Seal the space between 6 and 6.

According to the sealing device 76, when in use, the sealing material 78 is pressed against the outer circumferential surface of the shield body or lining via the cushioning material 80, so that the sealing material 78 is not worn or damaged due to movement of the shield body relative to the sealing material 78. Also, wear and damage of the sealing material 78 due to movement of the lining relative to the sealing material 78 when the lining is propelled together with the shield body is prevented.

15 to 18, a sealing device 96 is shown that is applied to a starting opening 94 formed in a shaft wall 92 of a starting shaft 90 for the shield type tunneling machine 32. Sealing device 96 includes essentially the same components as in sealing device 30, namely sealant 40.
, a holding plate 44, a bolt 46, a nut 4B, an expansion body 62, and a fitting 98.

The sealing material 40, presser plate 44, bolt 46, nut 48, and expansion body 62 are the same as those in the sealing device 30. Further, the fitting 98 is the same as the fitting 50 of the sealing device 30 except that the first flange portion 54 is provided at the end of the cylindrical portion 52 on the second flange portion 56 side. .

The sealing device 96 is attached to the first flange portion 54 of the fitting 98.
anchor bolts 66 and nuts 68 at multiple locations.
Therefore, the axis of the hole 42 of the sealing material 40 coincides with that of the opening 38, and the expanding body 62 is aligned with the sealing material 40 by the excavator 3.
It is fixed to the pit wall 92 so as to be rearward in the direction of propulsion of No. 2.

As shown in FIG. 17, the expansion body 62 is contracted until the excavator 32 reaches the position of the sealing material 40. When the excavator 32 is propelled from the position shown in FIG.
As shown in FIG. 8, the inner peripheral edge of the sealing material 40 around the hole 42 is pushed forward by the excavator 32 in the direction of propulsion of the excavator.

When the sealing material 40 is bent, high-pressure working fluid is supplied to the expansion body 62 and the expansion body 62 is expanded.
The inner circumferential edge of the sealing material 40 is pressed against the outer circumferential surface of the shield body by the expansion body 62. As a result, the space between the shield body and the pit wall 92 is sealed. The excavator 32 is the sealing material 40
When moved forward from the position, the inner circumferential edge of the sealing material 40 is pressed against the outer circumferential surface of the lining that continues behind the excavator 32, thereby sealing between the lining and the tunnel wall 92. This sealing device 9
In the case of No. 6 as well, the inflatable body 62 may be inflated in advance.

Sealing device 70 shown in Figs. 5 to 8, Figs. 9 to 12
The sealing device 76 right shown in the figure and the sealing device 7f shown in FIGS.
4 on the side of the second flange portion 56, it is possible to provide a sealing device that can be applied to the starting opening 94.

The seal device 30, 70, 76, 86° 96 has a fitting 5 as shown in FIG.
0 and the holding plate 44 may be provided with ribs 100, 102, and 104. Further, as shown in FIG. 20, a modification of the fixture 50 is such that instead of providing the first flange portion 54 of the fixture 50.98, the cylindrical portion 52 is further extended from the third flange portion 58. The extension portion 106 may be fixed to the inner peripheral surface of the shaft wall 36 defining the hole 38 with bolts, nuts, or the like.

Each of the above sealing devices 30, 70, 76, 86°96 is
The present invention can be applied not only to an excavation method for constructing a tunnel or laying a conduit using the shield type tunneling machine 32, but also to laying a conduit using a pipe propulsion method. Further, the sealing material 40°72, holes 42, 82, fitting 50.9B, recess 60, and expansion body 62.72 of each sealing device 30.70.76.86.96 are circular in the illustrated example. However, when the opening or the hollow body has a different shape, the shape may be a polygon, an eyebrow shape, an oval shape, an oval shape, a spectacle shape, etc., depending on the shape.

[Brief explanation of the drawing]

Figures 1 to 4 are views showing an embodiment of the sealing device of the present invention applied to an access opening, in which Figure 1 is a longitudinal sectional view, Figure 2 is a left side view, and Figure 3 is a left side view. 2 is an enlarged sectional view taken along the line 3-3 in FIG. 2, and FIG. 4 is a sectional view similar to FIG. 3 when the inflatable body is inflated. 5 to 8 are views showing other embodiments of the sealing device of the present invention applied to the access opening, in which FIG. 5 is a longitudinal sectional view, FIG. 6 is a left side view,
FIG. 7 is an enlarged sectional view taken along the line 7--7 of FIG. 6, and FIG. 8 is a sectional view similar to FIG. 7 when the inflatable body is expanded. 9 to 12 are views showing still other embodiments of the sealing device of the present invention applied to the access opening, in which FIG. 9 is a longitudinal sectional view, FIG. 10 is a right side view, and FIG. Figure 11 is an enlarged cross-sectional view taken along line 11-11 in Figure 10;
FIG. 2 is a sectional view similar to FIG. 11 when the inflatable body is inflated. 13 and 14 are views showing still another embodiment of the sealing device of the present invention applied to an access opening, with FIG. 13 being a longitudinal sectional view and FIG. 14 being a right side view. be. FIG. 15 and FIG. 18 are diagrams showing an embodiment of the sealing device of the present invention applied to a starting opening,
Fig. 15 is a longitudinal sectional view, Fig. 16 is a right side view, Fig. 17 is an enlarged sectional view taken along line 17-17 in Fig. 16, and Fig. 16 is a right side view.
FIG. 8 is a sectional view similar to FIG. 17 when the inflatable body is expanded. FIG. 19 is a sectional view similar to FIG. 3, showing an embodiment using another fixture; FIG. 20 is a sectional view similar to FIG. 17, showing an embodiment using another fixture. It is. 21 and 22 are views showing an example of a conventional sealing device, with FIG. 21 being a longitudinal sectional view and FIG. 22 being a right side view. 30.70, 76.86, 96: Seal device, 34.9
0: Pit, 36,92: Pit wall, 38.94: Pit wall, 40
, 78: sealing material, 42.82: hole, 50.98: fitting, 60: recess, 62, 72: expanding body, 80.
88:l impact. Figure 1 Agent Patent Attorney Nobuyuki Matsunaga Figure 3] Figure 7 Figure Figure Figure Figure

Claims (9)

[Claims] (1) A sealing device disposed on the shaft wall so as to seal between the hollow body received in an opening formed in the shaft wall of a shaft for constructing a tunnel or laying a conduit and the shaft wall. an elastically deformable sealing member having a hole capable of receiving the hollow body; and an inflatable member capable of being inflated by a fluid, the sealing member having at least a portion around the hole of the sealing member when inflated. An opening sealing device comprising: an inflatable body that presses a portion against the outer circumferential surface of the hollow body; and a fixture that fixes the inflatable body and the sealing material to the shaft wall. (2) The sealing material includes an elastically deformable annular plate having the hole, and the expanding body is located on one side of the plate in the thickness direction and extends along a virtual annular line around the hole. The fitting is attached to the fitting so as to extend along the hole, and the fitting fixes the plate to the shaft wall so that the portion of the plate around the hole is elastically deformed inwardly of the plate by the hollow body. The sealing device according to claim 1, further comprising a fixing portion for fixing the sealing device. (3) The sealing material includes an elastically deformable annular plate having the hole, and the expanding body is located on one side in the thickness direction of the plate and extends along a virtual annular line around the hole. The fixture is attached to the plate so as to extend along the hole, and the fixture fixes the plate to the mine wall such that the hollow body elastically deforms the plate around the hole. The sealing device according to claim 1, comprising a fixing part. (4) Claim (4) wherein the inflatable body is attached to the fixture so as to extend along a virtual annular line around the hole, and the sealing material is disposed on the inner surface of the inflatable body.
1) The sealing device according to item 1). (5) A plurality of elastic members attached to the fitting so as to be located on the rear side in the direction of propulsion of the hollow body with respect to the inflatable body and protrude toward the center of the inflatable body; 5. The sealing device of claim 4, further comprising a plurality of resilient members disposed along. (6) The seal device according to claim (1), wherein the expansion body includes an annular tube extending along an imaginary line around the hole. (7) Claim (1) wherein the expansion body includes a plurality of tubes arranged along a virtual annular line around the hole.
) The sealing device described in ). (8) The adjacent tubes are interconnected.
The sealing device according to claim (7). (9) The fitting includes an annular fixing part that fixes the outer peripheral edge of the sealing material, and a recess that opens on the central axis side of the sealing material so as to receive the tube, and the fixing part includes an annular fixing part that fixes the outer peripheral edge of the sealing material. and an annular recess extending along the
6) or the sealing device according to (7).