JP2003003785A - Sealing bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing bag capable of closely covering a groove of a column body having the groove without displacement. SOLUTION: The sealing bag 1 is constituted of an outside cylinder 2 and an inside cylinder 3 inserted inside of the outside cylinder 2 having the approximately same diameter as that of the outside cylinder 2, both ends of the outside cylinder 2 and the inside cylinder 3 are consecutively connected, and it is an invertible double cylinder forming a space between the outside cylinder 2 and the inside cylinder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing bag for pressing a packing, which is arranged on the outer periphery of a cylindrical body having a groove in the longitudinal direction, into the groove.

[0002]

2. Description of the Related Art The shield method is used when constructing subway tunnels, sewers, etc. in urban areas when there are houses or buildings on the ground and construction (excavation method, etc.) cannot be performed from the ground. Due to the construction method, the number of construction examples has increased in recent years. The construction method is to dig a vertical shaft on the side where the machine is started and a side where the machine is to reach, and to start a machine from inside the vertical shaft on the starting side to dig a tunnel to the arrival shaft.

In such a shield construction method, an entrance provided with packing is arranged on the side where the excavator is started and the side where it reaches. FIG. 8 shows a sectional view of the shield construction method in a direction parallel to the propelling direction in this case, and FIG. 9 shows a sectional view taken along the line aa ′ of FIG. This packing prevents groundwater and the like from leaking into the shaft by sealing the outer circumference of the machine when the machine starts and arrives. For example, as shown in Fig. 9, the center of a square rubber plate is used. The one with a circular hole is used.

In the hole, as shown in FIG.
Is inserted toward the natural ground G, internal pressure from the natural ground G is generated in the entrance 33, and the packing 31 is moved to the excavator 32.
It is pressed against and sticks. As a result, the outer periphery of the machine 32 can be reliably sealed and water can be prevented from entering the shaft due to groundwater pressure.

[0005]

However, in the shield method, the excavator having a small diameter (250 φ to 800 φ) is used.
If about φ) is used, the excavated soil cannot be discharged from the inside of the excavator, and therefore a groove for discharging the excavated soil is provided on the side surface of the excavator. In this case, the above method
The packing cannot sufficiently press the groove part of the machine.

Therefore, a rubber-made spherical bag is arranged in advance in a portion of the packing which is in contact with the groove of the excavator and is inflated to press the packing against the excavator. However, there is a problem that when the excavator rotates, the bag shifts from the position where it is placed in advance and does not fit in the groove. Further, there is also a problem that the seal cannot be sufficiently sealed because the seal cannot adhere to the groove of the excavator and close and close the gap.

The present invention has been made in view of the above-mentioned problems, and can seal a groove of a columnar body having a groove in the longitudinal direction without slipping the position and tightly closing and closing the gap. The purpose is to provide.

[0008]

A sealing bag according to claim 1 of the present invention for solving the above-mentioned problems is inserted into an outer cylinder and the outer cylinder having substantially the same diameter as that of the outer cylinder. It is composed of an inner cylinder, the outer cylinder and the inner cylinder are connected so as to be continuous at both ends, and an inflatable space is formed between the outer cylinder and the inner cylinder. It is a double cylinder.

According to the above construction, the sealing bag is a reversible double cylinder and therefore can be deformed. When the sealing bag is displaced from the predetermined position, the sealing bag is pressurized and naturally moves to the side with the gap. For this reason, it is possible to press without deviating from the predetermined position. Moreover, since the cross-sectional shape is flat and deformable, it can be closely attached to the groove or the like to close and press the gap.

According to a second aspect of the present invention, in the sealing bag according to the first aspect, the packing disposed on the outer periphery of the cylindrical body having the axial groove is pressed in the groove direction.

According to the above structure, since the sealing bag is a double cylinder that can be inverted, it can be deformed in the groove cross section direction. When the sealing bag is displaced from the position of the groove of the cylindrical body due to the rotation of the cylindrical body, the sealing bag is pressurized and moves toward the groove that naturally has a gap. For this reason,
Even if the columnar body rotates, the groove of the columnar body can be pressed without displacement. Further, since the cross-sectional shape is flat and deformable, it can be closely attached to the groove of the columnar body to close and press the gap, and the packing arranged on the outer periphery of the columnar body exhibits sufficient sealing property. be able to.

A sealing bag according to a third aspect of the present invention is the sealing bag according to the first or second aspect, wherein the outer cylinder is provided with a fixing means for restricting a reversing range and for attaching the bag.

According to the above structure, the fixing means prevents the sealing bag from reversing endlessly and moving to an unexpected location, and is reversibly mounted in the intended groove of the cylindrical body. You can

A sealing bag according to a fourth aspect is the sealing bag according to any one of the first to third aspects, wherein one ends of the outer cylinder and the inner cylinder are connected so as to be continuous by being folded back. The open sides of the other ends of the outer cylinder and the inner cylinder are connected so as to be closed and integrated.

According to the above structure, the manufacturing method is simple. Moreover, since it is a double cylinder that can be inverted within the length of the outer cylinder and the inner cylinder, it can be deformed in the groove cross section direction in the groove of the cylindrical body, and even if the cylindrical body rotates, the position from the groove can be changed. It can be pressed down sufficiently without shifting. Moreover, since the cross-sectional shape is flat and deformable, it can be closely attached to the groove of the cylindrical body to close and press the gap.

A sealing bag according to a fifth aspect of the present invention is the sealing bag according to any one of the first to fourth aspects, wherein an annular expander is housed in a space between the outer cylinder and the inner cylinder, and the expander is supplied to the expander. A discharge nozzle is provided so as to project from the hole of the outer cylinder.

According to the above construction, since the expander is housed, fluid is supplied to the expander from the supply / discharge nozzle,
The sealing bag can be inflated. As a result, when the sealing bag comes out of the groove, the fluid inside is pressed and moves to the side with a gap, so that it can move naturally to fit in the groove, and the reversing operation of the sealing bag is smooth. Will be done.

According to a sixth aspect of the present invention, in the sealing bag according to any one of the first to fifth aspects, the columnar body has a plurality of body portions including a tip excavation portion, and these body portions are connected to each other. It is an excavator, and the groove is for discharging excavated soil.

According to the above construction, the sealing bag allows the packing provided around the grooved excavator to be closely attached to the groove of the excavator without coming off the groove even when the excavator rotates. , You can close the gap and hold it down.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 5, one embodiment of the present invention will be described.

FIG. 1A shows a perspective view of the sealing bag 1 in this embodiment, and FIG. 1B shows an axial sectional view of the sealing bag 1. The sealing bag 1 includes an outer cylinder 2 facing outside, an inner cylinder 3 folded inward, and a tube 9 (expandable body) inserted in a space between the outer cylinder 2 and the inner cylinder 3.
And a hose 5 connected to the nozzle 4, and a nozzle 4 protruding from a hole of the outer cylinder 2 provided in the tube 9. There is a sewing part 10 somewhere in the inner cylinder 3.

The outer cylinder 2 and the inner cylinder 3 have the same diameter and are made of the same material. Moreover, the outer cylinder 2 and the inner cylinder 3 are continuously connected at both ends thereof, and have an endless structure as a whole. The outer cylinder 2 and the inner cylinder 3 are made of a flexible and airtight material such as rubber or soft synthetic resin. Further, if the turboline in which one side or both sides of the thin fiber cloth is coated with rubber or the like is used, the durability is enhanced.

The outer cylinder 2 and the inner cylinder 3 are not fixed, but can be interchanged with each other. In this sealing bag 1, the outer cylinder 2 and the inner cylinder 3 have the same material and the same diameter, and are in a uniform state throughout. for that reason,
Under a specific condition, half of the entire length of the double cylinder of the sealing bag 1 constitutes the outer cylinder 2, and the other half constitutes the inner cylinder 3.
Are configured. Therefore, when an external force is applied to the sealing bag 1, the outer cylinder 2 and the inner cylinder 3 are reversed and replaced,
The part that was the outer cylinder 2 until then becomes the inner cylinder 3 and conversely the inner cylinder 3
The part that was the above becomes the outer cylinder 2.

The supply / discharge nozzle 4 may have a known structure. From the supply / discharge nozzle 4 into the tube 9,
A fluid can be supplied.

The hose 5 is connected to the supply / discharge nozzle 4, and the fluid can be supplied from the hose 5 into the tube 9 via the supply / discharge nozzle 4.

The supply / discharge nozzle 4 and the hose 5 also function as fixing means. In FIG. 1B, the sealing bag 1 is axially reversible within a range from the state where the supply / discharge nozzle 4 and the hose 5 are located at the right end to the left end of the sealing bag 1.

The tube 9 is an inflatable body and is made of a flexible and airtight material such as rubber or soft synthetic resin. When the fluid is supplied from the supply / discharge nozzle 4, the tube 9
Expands, the space between the outer cylinder 2 and the inner cylinder 3 is pressurized by the pressure of the tube 9, and as a result, the outer cylinder 2 is inflated and at the same time the inner cylinder 3 is crushed. Since the tube 9 has a pillow shape, the sealing bag 1 also expands into a pillow shape.

Air is suitable as the fluid to be supplied into the tube 9. In addition, as the other fluid, a liquid having lubricity such as glycerin and soap water can be used.
And, depending on the diameter and length of the inner cylinder 3, the material, etc.,
10 to 90% of the volume in the tube 9 is preferable.

FIG. 2 is a sectional view in a direction parallel to the propelling direction of the shield construction method of this embodiment. An excavator 7 having a groove 7a for propelling in the natural ground G in the direction of the arrow is inserted into an entrance 8 provided with a packing 6. Sealing bag 1 connected to a hose 5 via a supply / discharge nozzle 4
Are arranged in such a manner that they can be reversed in the circumferential direction of the machine 7 and are interposed between the machine 8 and the entrance 8 to press the packing 6 toward the groove 7a.

FIG. 3 is a sectional view taken along the line AA 'of FIG. An excavator 7 having a groove 7a is inserted in the packing 6. A gap will be formed in the groove 7a unless the packing 6 is pressed.

FIG. 4 is a sectional view taken along the line BB 'of FIG. The sealing bag 1 presses the packing 6 provided on the entrance 8 in the direction of the groove 7 a of the machine 7. The sealing bag 1 can be inverted within the BB 'cross section. Since the reversible sealing bag 1 has less rounded corners than a circular bag, it fits on the slope of the groove 7a and the sealing property is improved.

FIGS. 5 (a) to 5 (c) are plan views showing the operation of the sealing bag 1 when the excavator advances while being displaced in the rotational direction. In FIGS. 5A to 5C, the sealing bag 1 is arranged in the groove 7 a of the excavator 7,
It is connected to the hose 5 via the supply / discharge nozzle 4. The sealing bag 1 is reversible in its axial direction, and when it is disengaged from the groove 7a and tries to move onto the groove 7, the sealing bag 1 is pressed and pressure is applied, and the sealing bag 1 is reversed and moved to the side having the gap.

In FIG. 5 (a), the supply / discharge nozzle 4 protruding from the outer cylinder 2 is located substantially in the center of the sealing bag 1, and the sewn portion 10 of the inner cylinder 3 is also located substantially in the center. . Figure 5
In (a), when the sealing bag 1 moves to the right and tries to come out of the groove 7a, the sealing bag 1 is pressed and flips in the direction of the arrow to be in the state shown in FIG. 5 (b). .

In FIG. 5B, the supply / discharge nozzle 4 projecting from the outer cylinder 2 is located at the right end of the sealing bag 1,
The sewing portion 10 of the inner cylinder 3 is located at the left end. Figure 5 (b)
The sealing bag 1 is moved to the left to move into the groove 7a.
When it is about to come off, the sealing bag 1 is pressed and flips in the direction of the arrow to the state shown in FIG. 5 (c).

In FIG. 5 (c), the supply / discharge nozzle 4 protruding from the outer cylinder 2 is located at the left end of the sealing bag 1, and the sewn portion 10 of the inner cylinder 3 is located at the right end.

The sealing bag 1 is shown in FIGS.
Within the range between (c) and (c), it is possible to reverse, deform, and move in the axial direction. The movable range in the axial direction limited by the provision of the supply / discharge nozzle 4, and the sewing portion 1
The axially movable range defined by 0 coincides.

Further, in the shield construction method, since the range in which the groove 7a moves in the cross-sectional direction is limited, the sealing bag 1 is limited in its axial movement range by the supply / discharge nozzle 4 and the hose 5 (fixing means). To stabilize the position.
Further, the hose 5 can supply the fluid into the sealing bag 1, and further, the position of the sealing bag 1 can be fixed.

In this embodiment, the packing 6 is pressed by the sealing bag 1, but the sealing bag 1 may be directly fitted into the groove 7a of the excavator 7 and used as a packing.

Next, FIGS. 6 (a) to 6 (g) are sectional views showing the manufacturing process of the sealing bag 1. As shown in FIG.

The tubular woven fabric 1a shown in FIG.
It is folded flat as shown in (b). One end of the tubular woven fabric 1a is turned over and the ends are aligned as shown in FIG. 6 (c).
As a result, the outer cylinder 2 and the inner cylinder 3 whose one ends are continuously connected
And are formed.

Then, in the space between the outer cylinder 2 and the inner cylinder 3,
As shown in FIG. 6D, a doughnut-shaped tube 9 (expansion body) having the supply / discharge nozzle 4 is inserted. As shown in FIG. 6E, the supply / discharge nozzle 4 of the tube 9 is taken out from the hole of the outer cylinder 2, and the open sides of the outer cylinder 2 and the inner cylinder 3 are integrally sewn to form a sewn portion 10.

Next, as shown in FIG. 6 (f), fluid is supplied from the supply / discharge nozzle 4 to expand the inserted tube 9. Further, as shown in FIG. 6 (g), the sewing portion 10 is pushed into the inner cylinder 3 at the back. As a result, the sealing bag 1 is formed. This sealing bag 1 can be reversed within the range from the position where the sewn portion 10 is at the right end to the left end of the sealing bag 1 in FIG. 6 (g).

As another embodiment of the sealing bag, FIGS. 7 (a) to 7 (g) are sectional views of the manufacturing process of the sealing bag 11 in which both ends of the outer cylinder and the inner cylinder are continuously connected. The figure is shown.

The tubular fabric 11a of FIG. 7 (a) is shown in FIG.
It is folded flat as shown in (b). One end of the tubular fabric 11a is turned over and the ends are aligned as shown in FIG. 7 (c). As a result, the outer cylinder 12 and the inner cylinder 13 whose one ends are continuously connected are formed.

Then, as shown in FIG. 7D, a donut-shaped tube 19 (expansion body) having a supply / discharge nozzle 14 is inserted into the space between the outer cylinder 12 and the inner cylinder 13. Figure 7
As shown in (e), the supply / discharge nozzle 14 of the tube 19 is taken out from the hole of the outer cylinder 12, and the open sides of the outer cylinder 12 and the inner cylinder 13 are sewn in a sleeve shape to form a sewn portion 20.

Next, as shown in FIG. 7F, a fluid is supplied from the supply / discharge nozzle 14 to expand the inserted tube 19. Further, as shown in FIG.
Is pushed into the inner cylinder 13. As a result, the sealing bag 11 is formed. The sealing bag 11 can be inverted endlessly unless the supply / discharge nozzle 14 is provided with a fixing means.

In the sealing bag 1, since the open sides of the outer cylinder 2 and the inner cylinder 3 are integrally sewn, the sewing process is simple. Although the range of reversal is limited, a range of reversal that sufficiently serves the purpose can be obtained depending on the application. Supply and discharge nozzle 4
Since the axially movable range limited by the provision of and the axially movable range limited by the sewing portion 10 match, when the supply / discharge nozzle is provided, it can be manufactured by a simple method. The sealing bag 1 may be used.

Further, since the outer bag 12 and the inner tube 13 are sewn in a sleeve shape, the sealing bag 11 is endlessly reversible, so that the sealing bag 11 is arranged in a groove of a columnar body that is violently rotated or moved. However, it is possible to reverse and move along the movement.

Further, the sealing bag 1 is reversible in the cross-sectional direction of the longitudinal direction of the cylindrical body, but it may be arranged and used so as to be reversed in a direction parallel to the propelling direction of the cylindrical body. is there.

Further, the sealing bag 1 may be one which can directly inject a fluid into the space between the outer cylinder 2 and the inner cylinder 3 without using the inflatable body 9.

The sealing bag 1 of the present invention is preferably used as a packing presser for the outer periphery of an excavator, but it can also be generally used as a packing presser for the outer periphery of a cylindrical body for civil engineering work.

[0052]

According to the first aspect of the present invention, since the sealing bag is a double cylinder that can be inverted, it can be deformed. When the sealing bag is displaced from the predetermined position, the sealing bag is pressurized and naturally moves to the side with the gap. For this reason, it is possible to press without deviating from the predetermined position. Moreover, since the cross-sectional shape is flat and deformable, it can be closely attached to the groove or the like to close and press the gap.

According to the second aspect, since the sealing bag is a double cylinder that can be inverted, it can be deformed in the groove sectional direction. When the sealing bag is displaced from the position of the groove of the cylindrical body due to the rotation of the cylindrical body, the sealing bag is pressurized and moves toward the groove that naturally has a gap. For this reason,
Even if the columnar body rotates, the groove of the columnar body can be pressed without displacement. Further, since the cross-sectional shape is flat and deformable, it can be closely attached to the groove of the columnar body to close and press the gap, and the packing arranged on the outer periphery of the columnar body exhibits sufficient sealing property. be able to.

According to the third aspect, the fixing means can fix the sealing bag in the intended groove of the columnar body without causing the sealing bag to endlessly reverse and move to an unexpected location. .

According to claim 4, the manufacturing method is simple. Moreover, since it is a double cylinder that can be inverted within the length of the outer cylinder and the inner cylinder, it can be deformed in the groove cross section direction in the groove of the cylindrical body, and even if the cylindrical body rotates, the position from the groove can be changed. It can be pressed down sufficiently without shifting. Moreover, since the cross-sectional shape is flat and deformable, it can be closely attached to the groove of the cylindrical body to close and press the gap.

According to the fifth aspect, since the expander is housed, the seal bag can be expanded by supplying the expander with fluid from the supply / discharge nozzle. This allows
When the sealing bag comes out of the groove, the fluid inside is pressed and moves to the side with a gap, so that it can move naturally to fit in the groove, and the reversing operation of the sealing bag is smoothly performed. It will be.

According to the sixth aspect of the present invention, the sealing bag allows the packing provided around the grooved excavator to be closely attached to the groove of the excavator without coming out of the groove even when the excavator rotates. , You can close the gap and hold it down.

[Brief description of drawings]

FIG. 1A is a perspective view and FIG. 1B is a sectional view of a sealing bag used in an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a shield construction method according to an embodiment of the present invention.

FIG. 3 is a sectional view taken along the line AA ′ in FIG.

FIG. 4 is a sectional view taken along line BB ′ in FIG.

FIG. 5 is a plan view showing the operation of the sealing bag in the embodiment of the present invention.

FIG. 6 is a cross-sectional view of the manufacturing process of the sealing bag used in the embodiment of the present invention.

FIG. 7 is a cross-sectional view of a manufacturing process of a sealing bag according to another embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view of a conventional shield construction method.

9 is a sectional view taken along the line aa ′ in FIG.

[Explanation of symbols]

1 Seal bag 2 outer cylinder 3 inner cylinder 4 supply / discharge nozzle 5 hoses 9 tube (expansion body) 10 Sewing part

Claims (6)

[Claims] 1. An outer cylinder and an inner cylinder that is inserted into the outer cylinder and has a diameter substantially the same as that of the outer cylinder. The outer cylinder and the inner cylinder are connected so that both ends are continuous. The bag for sealing is characterized in that it is a reversible double cylinder in which an inflatable space is formed between the outer cylinder and the inner cylinder. 2. The sealing bag according to claim 1, wherein the packing arranged on the outer periphery of the cylindrical body having the axial groove is pressed in the groove direction. 3. The sealing bag according to claim 1, wherein the outer cylinder is provided with fixing means for restricting the range of reversal and for mounting the bag. 4. The outer cylinder and one end of the inner cylinder are connected so as to be continuous by being folded back, and the open ends of the other ends of the outer cylinder and the inner cylinder are closed and integrated. The sealing bag according to any one of claims 1 to 3, wherein the sealing bag is connected as follows. 5. An annular expander is housed in a space between the outer cylinder and the inner cylinder, and a supply / discharge nozzle for the expander is provided so as to project from a hole of the outer cylinder. The sealing bag according to any one of claims 1 to 4, which is characterized in that. 6. The excavator, wherein the columnar body has a plurality of body parts including a tip excavation part, and these body parts are connected to each other,
The sealing bag according to claim 1, wherein the groove is for discharging excavated soil.