JP2838673B2 - Rubber band for pipe repair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid leaking point of a fluid such as a liquid or a gas flowing through various pipes such as a plumbing pipe and a gas pipe, for example, a fluid leaking point of a plumbing pipe. The present invention relates to an improvement in a rubber band for repairing a pipe used for stopping leakage of water.

[0002]

2. Description of the Related Art As a technique for repairing water leakage caused by cracks in various pipes, for example, water supply and drainage pipes without replacing the water supply and drainage pipes, the water leaks from the water supply and drainage pipes to react with water. A method of wrapping a repair tape provided with a curing material, for example, a polyurethane prepolymer, and stopping the water leakage by curing the repair tape is used.

However, since this type of repair tape requires a certain period of time to cure, it can be used to stop water from leaking in drain pipes that do not require water pressure. Could not be used as is.

That is, since water leaks from the water leaking point of the water supply pipe to a jet state due to the pressure of the water flowing through the water supply pipe, a gap is formed between the repair tape and the water supply pipe due to the water leaked in such a manner. Since the gap was left even after the repair tape was cured, water leakage could not be stopped.

For this reason, the water stoppage of the water supply pipe using the repair tape is generally performed after closing the valve of the water supply pipe and stopping the water supply. And it is difficult to get that opportunity. In particular, it is very difficult to obtain an opportunity to stop water supply in facilities such as condominiums and hospitals that require constant water supply.

[0006] From such a viewpoint, a temporary fixing means for the pipe is provided at one end of a rubber band wound around a leak point of the fluid in the pipe such as a liquid leak or a gas leak of the pipe such as a water supply / drain pipe, and a pipe is provided at the other end. The present applicant has previously proposed a rubber band for repairing a pipe, which is provided with a fastening means for preventing the wound rubber band from being unraveled. (Japanese Patent Application No. 7-27192)

According to this rubber band for pipe repair, the temporary fixing means is first wound around the pipe, so that the rubber band can be grasped with both hands without separately pressing the winding start side of the rubber band against the pipe. While strongly squeezing,
A rubber band can be wound around the tube in a tightened state, and the rubber band thus wound around the tube around the tightened body is not loosened without providing a knot by the fastening means. The rubber band can be wrapped tightly so as not to cause a thickness at the leaking portion of the fluid in the piping, and the rubber band can be brought into close contact with the leaking portion to stop leakage of the fluid.

As a result, by using the rubber band for repairing pipes, the repair tape having the substance which reacts with the water is wound on the rubber band which is wound tightly as described above. The final repair work can be performed by winding it in a state in which the thickness is not noticeable as much as possible, and the repair work that does not stop the transfer of fluid in the piping and does not replace the water supply pipe etc. It can be performed without impairing the appearance after repairing the leaked part.

[0009]

However, when the pipe is made of metal, the surface of the pipe may be rust or the like generated with the passage of time, or when the pipe is made of plastic. When there is a non-smooth portion due to dust attached to the tube, etc., when the rubber band is wound around the leaking portion generated on the non-smooth tube surface portion to temporarily prevent the leak, In some cases, it was difficult to enhance the adhesion between the rubber band and the leaked portion.

Further, since a step corresponding to the wall thickness of the pipe joint is formed at the pipe connecting portion by the pipe joint, the rubber band is wound around the leaking portion generated in the vicinity of such a connecting portion and the leak is generated. Even in the case of provisional fixing, it is sometimes difficult to enhance the adhesion between the rubber band and the leaked portion.

Therefore, the present invention reliably stops leakage of fluid from a leaking point even when the surface of the pipe around the leaking point is not smooth or when there is a step near the leaking point. It is an object of the present invention to provide a rubber band for repairing a pipe which can be wound around a leak point of the pipe.

[0012]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a method for repairing a pipe wound around a leaking point K of a fluid in the pipe P such as a liquid leak or a gas leak of the pipe P. The rubber band G has a temporary fixing means S-1 at one end of the rubber band G and a fastening means S-2 at the other end for preventing the rubber band G wound around the pipe P from coming loose. In addition to the above, the sealant 50 is provided in a state where the sealant 50 is attached to the surface of the rubber band G on the side in contact with the pipe P on the end side where the temporary fixing means S-1 is provided. .

Further, according to the invention described in claim 2, according to claim 1,
The sealant 50 in the pipe repair rubber band described in
It was a butadiene rubber.

Further, in the invention according to claim 3, the surface of the sealant 50 in the rubber band for repairing pipes according to claim 1 or 2 is covered with a release liner 51.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A typical embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows the rubber band G-1 according to the present embodiment, which is provided with adhesive tapes 20 and 30 at both ends of the band main body 10, so that the entire structure of the rubber band G-1 can be easily understood. G-1 is shown in a perspective view. FIG. 2 and FIG. 3 show both ends of the rubber band G-1 in cross section so that the configuration of the adhesive tapes 20 and 30 provided at both ends of the band main body 10 can be easily understood.

FIG. 4 shows a rubber band in which a part of the configuration of the rubber band G-1 is constructed by providing an adhesive tape 20 at one end of a band main body 10 and a planar fastener 40 at the other end. The rubber band G-2 is shown in a perspective state so that the entire configuration of G-2 can be easily understood. FIG.
Is an adhesive tape 2 provided at one end of the band body 10.
One end of the rubber band G-2 is shown in cross section so that the configuration of the band 0 can be easily understood. FIG. 6 shows the configuration of the planar fastener 40 provided at the other end of the band main body. The other end of the rubber band G-2 is shown in a cross section for easy operation.

FIGS. 7 to 12 show the state of use of the rubber band G-1, that is, the repairing work of the pipe P using the rubber band G-1, in this case, the process of stopping the water supply / drainage pipe Pw. (FIGS. 7 to 12) and the end state of the water stoppage work (FIGS. 13 and 14).

FIG. 15 and FIG. 16 show a state in which water is cut off in the vicinity of a connection portion by the pipe joint P ″ by the rubber band G-1.

FIG. 17 shows the rubber band G-2.
Shows the usage state of the.

The rubber band G according to this embodiment shown in each of the above-mentioned drawings is, for example, as shown in FIG. K, here, it is used to wind tightly around a cracked portion K ′ generated in the water supply / drainage pipe Pw as shown in FIG. 12 so as to stop water leakage from the cracked portion K ′. Even if the pipe surface around the leak point K of P is not smooth or if there is a step near the leak point K, the pipe P It is provided with a structure that can be wound around the leak location K.

That is, the rubber band G according to the present embodiment is a rubber band G that is wound around a leak point K of a fluid in the pipe P such as a liquid leak or a gas leak of the pipe P, and has one end connected to the pipe P. And a fastening means S-2 for preventing the rubber band G wound around the pipe P from loosening at the other end.

Therefore, according to the rubber band G according to this embodiment, the temporary fixing means S-1 is temporarily fixed to the pipe P first, so that the winding start side of the rubber band G is separately fixed to the pipe P. The rubber band G can be easily wound around the pipe P in a tightened state while holding the rubber band G with both hands and strongly pulling and squeezing it without pressing. Can be prevented from loosening the rubber band G wound around the pipe P in such a tight state without providing the rubber band G at the fluid leakage point K in the pipe P. The fluid can be prevented from leaking out by tightly winding the rubber band G to the leaking point K.

The temporary fixing means S-1 only needs to have a structure capable of temporarily fixing the winding start side of the rubber band G to the pipe P to the pipe P. For example, the rubber band G May be configured as the adhesive tape 20 integrally provided by bonding or the like to the end of the winding start side of
Further, the rubber band G may be configured as an adhesive layer provided on the surface in contact with the pipe P on the winding start side. Further, it may be configured as a planar fastener comprising a male portion provided toward one surface side of the rubber band G and a female portion provided toward the other surface side of the rubber band G. When this temporary fixing means S-1 is configured as such a planar fastener, even when the rubber band G gets wet with water, it is possible to reliably perform the temporary fixing at the start of winding on the pipe P.

Further, the fastening means S-2 has a structure capable of maintaining the wound state by preventing the rubber band G wound around the pipe P from being loosened in the tightened state as described above. If it is sufficient, for example, the rubber band G
May be configured as an adhesive tape 30 integrally provided by bonding or the like to the end on the winding end side of the rubber band G. Also, an adhesive layer provided on the surface of the rubber band G that is in contact with the pipe P on the winding end side It may be constituted as. Further, it may be configured as a planar fastener 40 including a male portion 42a provided toward one surface side of the rubber band G and a female portion 41a provided toward the other surface side of the rubber band G. When the fastening means S-2 is configured as such a planar fastener 40, especially when the rubber band is wet with water, the fastening of the winding end to the pipe P can be reliably performed.

As a result, when the rubber band G according to this embodiment is used, the repair tape T provided with a substance which reacts with water and hardens from above the rubber band G wound tightly as described above. The repair tape T thus wound can be wound without making the thickness as noticeable as possible. The hardening of the wound repair tape T does not stop the transfer of the fluid in the pipe P, and also replaces the water supply pipe. Can be performed without impairing the appearance of the repaired portion of the pipe P as much as possible.

As the repair tape T, for example, a tape-shaped woven or knitted fabric made of a glass fiber material is added to a polyurethane prepolymer which is cured by reacting with water.
Is used.

The rubber band G according to this embodiment
Is configured such that a sealant 50 is provided in a state of being attached to a surface of the rubber band G on the side in contact with the pipe P on the end side where the temporary fixing means S-1 is provided.

Therefore, according to the rubber band G according to this embodiment, rust that occurs with time on the surface of the pipe P,
When the pipe surface around the leaking point K is not smooth due to dust attached thereto, or due to a step corresponding to the wall thickness of the pipe joint P ″ formed at the connection portion of the pipe P by the pipe joint P ″, Even when the vicinity of the leak point K is not flat, the rubber band G can be tightly wound around the leak point K in a state where the leak point K is tightly closed by the sealing agent 50. Thus, leakage of the fluid from the leak location K can be reliably stopped.

The sealant 50 may have a width,
The length of the rubber band G may be appropriately changed and attached to the surface of the rubber band G on the side in contact with the pipe P.

Examples of the sealant 50 include rubber having a function of closing seams and gaps in a watertight or airtight state, plastics, and the like, such as various rubbers having a required flexibility by adding a softener. You can use it.

Typically, it is one of the best embodiments of the present invention that the sealant 50 is made of butadiene rubber.

Further, one of the best embodiments of the present invention is that the surface of the sealant 50 in the rubber band G according to the above embodiment is covered with a release liner 51.

According to this configuration, when the rubber band G is wound, the sealing agent 50 does not adhere to the surface of the rubber band G in contact with the sealing agent 50, and the rubber band G is conveniently wound. Configured to be used in times
Can be prepared.

Next, the rubber band G according to this embodiment will be described in more detail with reference to FIGS.

The rubber band G-1 particularly shown in FIGS. 1 to 3 has a rubber band main body 10 in the form of a flat cord and the rubber band G provided at one end of the rubber band G-1.
-1 to prevent loosening of the adhesive tape 20 as a temporary fixing means S-1 to the pipe P and the rubber band G-1 provided at the other end of the rubber band G-1 and wound around the pipe P. And an adhesive tape 30 as a fastening means S-2.

The length and width of the band body 10 are set to appropriate lengths and widths according to the diameter of the pipe P to be wound. In addition, the thickness of the band body 10 is also set to an appropriate thickness as needed, but the thickness of the band body 10 wound around the pipe P is made inconspicuous, so that the appearance of the pipe P at the water stop work location is adjusted. From the viewpoint of making the band main body 10
Is preferably made as thin as possible. Further, the band body 10 may be configured using natural rubber or may be configured using synthetic rubber.

As shown particularly in FIGS. 1 and 2, the adhesive tape 20 provided at one end of the band main body 10 has one end connected to the band main body 10 toward the outside in the longitudinal direction of the band main body 10. Is secured to the end of the band body 10. Further, the adhesive tape 20
Pressure-sensitive adhesive layer 2 provided on one side with protective release liner 22
1 is provided.

The adhesive tape 30 provided at the end of the band body 10 on the side where the adhesive tape 20 is not provided is, as particularly shown in FIG. 1 and FIG. One end is fixed to the end of the band main body 10 so as to be continuous with the band main body 10. The pressure-sensitive adhesive tape 30 has a pressure-sensitive adhesive layer 3 having a protective release liner 32 on the same side as the side on which the pressure-sensitive adhesive layer 21 of the pressure-sensitive adhesive tape 20 is provided.
1 is provided.

The length of the adhesive tapes 20, 30 is as follows:
The width and the like may be appropriately changed as needed. Also,
The adhesion of the adhesive tapes 20 and 30 to the band main body 10 is performed using an appropriate attachment means such as adhesion or welding.

In the rubber band G-1 in this embodiment, the surface of the band body 10 on the side in contact with the pipe P at the end side where the temporary fixing means S-1 is provided. A sealing agent 50 formed in a substantially rectangular shape is provided in the attached state.

The surface of the sealing agent 50 is covered with a strip liner-shaped release liner 51.

Rubber band G-1 constructed as described above
For example, as shown in FIG. 8, the adhesive tape 20 is configured to be used in a wound state such that the side of the adhesive tape 20 is located at the end of winding.

In this embodiment, the pressure-sensitive adhesive layers 21 and 31 of the pressure-sensitive adhesive tapes 20 and 30 are protected by the release liners 22 and 32 as described above.
32 may be omitted, and the adhesive tape 20 as the temporary fixing means S-1 and the adhesive tape 30 as the fastening means S-2 may be formed.

Next, repair work of the pipe P using the rubber band G-1 configured as described above, here, water stop work of the water supply / drain pipe Pw will be described.

First, as shown in FIG.
FIG. 8 shows the water supply / drainage pipe Pw causing water leakage from
As shown in the figure, the adhesive tape 20 of the rubber band G-1
The adhesive tape 20 is wound so that the adhesive surface of the adhesive layer 21 of the adhesive tape 20 is adhered to the pipe P ′ constituting the water supply / drain pipe Pw. This winding may be performed so that the adhesive tape 20 is inclined with respect to the axial center line of the pipe P ′, or may be performed so that the adhesive tape 20 is orthogonal.

As described above, the adhesive tape 20 is connected to the plumbing pipe P
By wrapping around the pipe P 'constituting w, one end of the rubber band G-1 can be temporarily fixed near the cracked portion K' of the pipe P '. As a result, after this temporary fixing,
As shown in FIG. 9, the band body 10 is connected to the pipe P ′.
The band main body 10 of the rubber band G-1 is gripped with both hands so that the rubber band G-1 is tightly wound around the pipe P 'while tightly squeezing the rubber band G-1. be able to.

Further, simultaneously with the temporary fixing of the rubber band G, the release liner 51 is removed from the surface of the sealant 50.
The sealing agent 50 is applied to the cracked portion K ′ so that the sealing agent 50 blocks the cracked portion K ′ of the water supply / drain pipe Pw, and the sealing agent 50 is attached in this state. As shown in FIG. 9 and FIG. 11, the rubber band G-1 is sequentially wound around the pipe P 'constituting the water supply / drain pipe Pw.

Lastly, the release liner 32 was peeled off from the adhesive tape 30 provided at the end of the rubber band G-1 on the winding end side of the band body 10, and the adhesive tape 20 was wound. Side and the crack location K '
The adhesive tape 30 against the pipe P 'on the opposite side
The adhesive tape 30 is wound so that the adhesive surface of the adhesive layer 31 is adhered, and the wound rubber band G-
Make sure that 1 does not come loose.

The rubber band G-1 wound tightly around the pipe P 'constituting the water supply / drain pipe P in this manner applies the sealing agent 50 attached to the cracked point K' to the cracked point K '. The sealing agent 50 pressed strongly in this manner may cause the pipe P 'around the cracked portion K' to have a non-smooth surface or a pipe joint near the cracked portion K 'as shown in FIG. Even when the edge e of P ″ is located and the vicinity of the crack K ′ is not flat, it is in close contact with the entire surface around the crack K ′, and in some cases, one of the The cracked portion K 'is closed in a water-tight or air-tight state by entering the portion.

Thus, according to the rubber band G-1 according to the present embodiment, the leakage of the supply and drainage flowing through the supply / drain pipe Pw from the crack K 'is prevented against the water pressure of the supply and drainage. Can be stopped reliably.

Next, the rubber band G-1 wound tightly around the pipe P 'constituting the water supply / drain pipe Pw as described above.
From above, as shown in FIG. 13, a waterproof tape T provided with a substance which reacts with water and hardens is attached to the rubber band G-1.
Wrap it around to cover it.

The repair tape T is wound around the rubber band G-1 tightly wound around the pipe P '.
As a result, since water leakage from the cracked portion K 'is stopped, it can be performed without any trouble.

Since the rubber band G-1 can be wound around the water supply / drain pipe Pw without knots by the adhesive tape 20 and the adhesive tape 30, the repair tape T is wound around the rubber tape G-1. This can be performed in a state where the repair tape T is in close contact with the peripheral surfaces of the rubber band G-1 and the water supply / drain pipe Pw. Construction can be performed reliably.

That is, according to the water stoppage using the rubber band G-1 according to this embodiment, not only the drainage pipe but also the leakage of the water supply pipe can be achieved without closing the valve of the water supply pipe. The leakage can be reliably stopped without replacing the water supply pipe.

Also, the water leakage was caused by the rubber band G-
1, the number of windings of the repair tape T at the leaking point can be minimized, and the rubber band G-1 is attached to the adhesive tape 20.
And the adhesive tape 30 can be wound around the water supply / drain pipe Pw so as not to cause a thickness.
According to the water stopping work, it is possible to make the thickness by winding the rubber band G-1 and the repair tape T wound around the water stopping work place as inconspicuous as possible, thereby causing water leakage of the water supply / drain pipe Pw. The appearance of the leaked portion K after the water stoppage can be adjusted.

Next, the rubber band G-1 described above is used.
The rubber band G-2 in which a part of the configuration is changed will be described based on FIGS. 4 to 6 and FIG.

As shown particularly in FIG. 4, the rubber band G-2 according to this embodiment is wound around a water supply / drain pipe Pw provided at the other end of the rubber band main body 10 having a flat cord shape. The fastening means S-2 for preventing loosening of the rubber band G-2 is configured as a planar fastener 40.

As shown particularly in FIGS. 4 and 6, the planar fastener 40 has one end connected to the band body 10 so as to extend outward in the longitudinal direction of the band body 10. And a band body 1 of this female fastener 41
0 from the end not connected to the female fastener 41
And a male fastener 42 provided with one end fixed to an end of the female fastener 41 so as to be continuous with the male fastener 42. The female fastener 41 is fixed to the band body 10 so that the female portion 41a engaged with the male fastener 42 is directed to the same side as the side of the adhesive tape 20 on which the adhesive layer 21 is not provided. Wearing and male fastener-4
2 is a male part 42a engaged with the female fastener 41.
Is fixed to the female fastener 41 so as to face the side opposite to the side where the female portion 41a is provided.

Therefore, according to the rubber band G-2 according to this embodiment, the pipe constituting the water supply / drainage pipe Pw is formed so that the rubber band G-2 is covered with the sealing agent 50 at the cracked portion K '. After being wound tightly around P ′, as shown in FIG. 17, the male part 42a of the male fastener 42 of the planar fastener 40 is connected to the female part 41a of the female fastener 41 at the end of the winding of the rubber band G-2. , It is possible to prevent the rubber band G-2 wound around the pipe P 'from loosening.

The length, width and the like of the planar fastener 40 may be changed as necessary. The female fastener 41 constituting the planar fastener 40 with respect to the band main body 10 and the male fastener 42 with respect to the female fastener 41 are fixed using a suitable fixing means such as adhesion or welding.

The rubber band G-2 constructed as described above
Also, for example, the sheet fastener 40 is configured to be used in a wound state such that the side of the planar fastener 40 is located at the end of winding.

In particular, in the rubber band G-2 according to this embodiment, the rubber band G wound as described above is used.
The male part 4 which constitutes the planar fastener 40 with the release of -2
Since this is prevented by the engagement between the 2a and the female portion 41a, even if the planar fastener 40 gets wet during the water stopping operation, the engagement force is hardly lost.

[0064]

The rubber band G according to the present invention has an end portion provided with a temporary fixing means S-1 for temporarily fixing the rubber band G to the pipe P at the winding start side of the rubber band G. Of the sealant 50
Is attached to the pipe P, the surface of the pipe P around the leaking point K is not smooth due to rust generated over time on the surface of the pipe P or dust attached thereto, or the pipe joint P " Due to the step corresponding to the thickness of the pipe joint P ″ formed at the connecting portion of the pipe P due to
Is not flat, the rubber band G can be tightly wound around the leak location K in a state where the leak location K is tightly closed by the sealant 50. Leakage of fluid from location K can be reliably stopped.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rubber band G-1.

FIG. 2 is a sectional view taken along the line II in FIG.

FIG. 3 is a cross-sectional view taken along a roll line in FIG. 1;

FIG. 4 is a perspective view of a rubber band G-2.

FIG. 5 is a sectional view taken along the line C-A in FIG. 4;

FIG. 6 is a cross-sectional view taken along a line II in FIG. 4;

FIG. 7 is a perspective view of a water supply / drain pipe Pw.

FIG. 8 is a perspective view showing a use state of the rubber band G-1.

FIG. 9 is a perspective view showing a usage state of the rubber band G-1.

FIG. 10 is a cross-sectional view taken along a hoe line in FIG. 9;

FIG. 11 is a perspective view showing a usage state of the rubber band G-1.

FIG. 12 is a perspective view showing a usage state of the rubber band G-1.

FIG. 13 is a perspective view of a water supply / drainage pipe Pw in which water blocking has been completed.

FIG. 14 is a sectional view taken along line F-F in FIG. 13;

FIG. 15 is a perspective view showing a usage state of the rubber band G-1.

16 is a sectional view taken along a toe line in FIG.

FIG. 17 is a perspective view showing a usage state of the rubber band G-2.

[Explanation of symbols]

 G Rubber band P Piping S-1 Temporary fixing means S-2 Fastening means 50 Sealant 51 Release liner

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B29C 63/00-63/48 F16L 55/16-55/18 PCI (DIALOG)

Claims (3)

(57) [Claims] 1. A rubber band wrapped around a fluid leak in a pipe such as a liquid leak or a gas leak in the pipe,
At one end of the rubber band is provided a means for temporarily fixing to the pipe, and at the other end there is provided a fastening means for preventing the rubber band wound around the pipe from loosening. A rubber band for repairing a pipe, wherein a sealant is provided in a state of being attached to a surface of the end portion provided with the temporary fixing means, the surface being in contact with the pipe. 2. The rubber band for repairing pipes according to claim 1, wherein the sealant is a butadiene rubber. 3. The rubber band for repairing piping according to claim 1, wherein the surface of the sealant is covered with a release liner.