Pipe repair device and arrangement method of the same

Abstract

To provide a pipe repair device which can protect a defective part stably for a long time and which enables attachment of a drain pipe of an express highway, in which a flat metal fitting is often provided on a side surface of the pipe, while avoiding hindrance caused by the flat metal fitting.SOLUTION: A pipe repair device 1 disposed in a repaired portion of a pipe 42, includes: a casing part 11 in which an inner surface having a substantially concave shaped cross section is formed; an elastic member 13 formed on the inner surface of the casing part 11; flange parts 12 formed at both ends of the casing part 11; and contact plates 16 each of which is spaced apart from the flange part 12 and disposed through two or more fastening members 14.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a pipe repair device disposed at a repair location of a pipe, and a method for disposing the same.

Background Art

[0002] Conventionally, water accumulated on a highway is discharged by a drain pipe.

[0003] FIG. 13 shows an example of a general drain pipe 71 disposed on this highway 7.

[0004] The drain pipe 71 has a pipe 711 extending in the vertical direction connected to the bottom of the highway 7, and a pipe 712 that bends at a substantially right angle from this pipe 711 and extends in a substantially horizontal direction. A circular flange 713 that is flat and has an enlarged diameter is provided at the downstream end of the pipe 712, and this circular flange 713 and the circular flange 715 of another pipe 714 are fixed by being fastened to each other via bolts 716 or the like. A flat metal fitting 720 is attached to the side surface of the pipe 712, and a threaded rod 722 extending downward from the bottom of the highway 7 with respect to this metal fitting 720 is fixed via a nut 723, thereby preventing the pipe 712 itself from falling.

[0005] The water accumulated on the highway 7 flows through the pipes 711 and 712 and is guided from the upstream side to the downstream side to the pipe 714.

[0006] By the way, the water accumulated on this highway 7 often contains a lot of salt, such as rainwater and snow melting agents. For this reason, when water flows from the highway 7 to the drain pipe 71, the drain pipe 71 is corroded by the salt contained therein.

[0007] Particularly, in the portion that bends at a substantially right angle from pipe 711 to pipe 712, water often accumulates in a pool-like manner, and the step between pipe 712 and circular flange 713 also promotes this. As a result, a defective portion due to corrosion occurs on the bottom surface of pipe 712 where water contacts for a long time. When such a defective portion occurs, the water accumulated on highway 7 leaks from there, so repair becomes necessary.

[0008] Conventionally, as a method for repairing a drain pipe installed on this highway, a method of attaching a repair tape to the defective portion of the drain pipe has been common (see, for example, Patent Document 1). However, the method using the repair tape disclosed in such Patent Document 1 has problems in that the repair quality varies depending on the skill of the worker actually performing the repair, and in addition, the workload of the working hours is large. In addition to the fact that the repair tape itself is not very durable, it is difficult to stably protect the defective portion with the repair tape for a long time under circumstances where external factors such as load due to jet cleaning or sediment deposition may occur.

[0009] In recent years, a pipe repair tool shown in Patent Document 2 has been proposed. According to the disclosed technology of this Patent Document 2, an arc-shaped band member is tightened from above and below to fasten to each other with respect to the defective portion of the pipe, and the defective portion of the pipe is repaired by crimping a rubber packing on the outer peripheral surface. According to the disclosed technology of Patent Document 2, a uniform surface pressure can be applied to the pipe to be repaired only by tightening the metal band member from above and below, and variations in quality can be suppressed without being affected by the skill of the worker.

[0010] However, according to the disclosed technology of this Patent Document 2, when tightening the arc-shaped band member from above and below, for example, when a flat metal fitting 720 is provided on the side surface of the pipe 712 as shown in FIG. 13, this becomes an obstacle and a support surface for tightening cannot be secured. For this reason, with the disclosed technology of Patent Document 2, it is impossible to attach to a pipe 712 having a metal fitting 720 provided on its side surface, and the places of use are limited. In addition to this, according to the disclosed technology of Patent Document 2, since the configuration is such that two band members that are disassembled separately from each other are assembled on-site as a set each time they are installed, there is also a problem that it requires a large amount of man-hours for that part.

Prior Art Documents

Patent Documents

[0011]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0012] Therefore, the present invention has been devised in view of the above-described problems, and its object is to stably protect a damaged part over a long period of time in a pipe repair device disposed at a repair location such as a damaged part of a pipe, and to be able to achieve attachment without using as an obstacle even in a drain pipe of an expressway where a flat metal fitting is often provided on the side surface of the pipe. Furthermore, the present invention relates to a pipe repair device capable of reducing the work load of assembling parts on-site by being configured as a set in which the constituent parts are not disassembled from each other and inseparable, and a method of disposing the same.

Means for Solving the Problems

[0013] The pipe repair device according to the first invention is a pipe repair device disposed at a repair location of a pipe, and includes a casing portion having an inner surface formed in a substantially concave curved surface shape, an elastic member formed on the inner surface of the casing portion, flange portions formed at both side ends of the casing portion, and a contact plate disposed via two or more fastening members spaced apart from the respective flange portions.

[0014] The pipe repair device according to the second invention is characterized in that, in the first invention, the contact plate has a long hole into which at least one of the fastening members is inserted and a groove portion into which the other fastening member is inserted.

[0015] The pipe repair device according to the third invention is characterized in that, in the first invention, the flange portion has a long hole into which at least one of the fastening members is inserted and a groove portion into which the other fastening member is inserted.

[0016] The pipe repair device according to the fourth invention is characterized in that, in the first invention, the contact plate is formed by laminating two or more metal plates.

[0017] The pipe repair device according to the fifth invention is characterized in that, in the first invention, it further includes a cylindrical body through which a bolt as the fastening member is inserted.

[0018] The pipe repair device according to the sixth invention is characterized in that, in the first invention or the third invention, it further includes an elastic body through which a bolt as the fastening member is inserted.

[0019] The pipe repair device according to the seventh invention is characterized in that, in the first invention, the flange portion is inclined toward the downstream side of the pipe to be disposed.

[0020] The pipe repair device according to the eighth invention is characterized in that, in the seventh invention, a backup material having higher viscosity than the elastic member is formed on the inner surface of the casing portion on the downstream side of the elastic member.

[0021] The pipe repair device according to the ninth invention is, in the seventh invention, characterized in that the elastic member protrudes from the casing portion toward the upstream side in the direction opposite to the downstream side.

[0022] The pipe repair device according to the tenth invention is, in the first invention, further characterized by comprising a wire fitting attached to a hole formed in the flange portion, and a wire that is fastened to the wire fitting and is at least formed in a ring shape.

[0023] A method for installing a pipe repair device according to the eleventh invention is a method for installing a pipe repair device by installing the pipe repair device at a repair location of a pipe. In this method, the casing portion in the pipe repair device according to the first invention is brought into contact with the repair location of the pipe, and while positioning a flat metal fitting provided on the side surface of the pipe between the fastening members, the contact plate is brought into contact, and further, by fastening the fastening members, the flange portion and the contact plate in contact with the metal fitting are clamped via the fastening members in a state of being separated from each other to be fixed.

Effect of the Invention

[0024] According to the present invention having the above-described configuration, the defective portion at the repair location is covered in a state of being pressed by the elastic member of the casing portion, so that it is possible to firmly prevent water flowing from upstream to downstream from leaking. In addition to this, according to the present invention, even when a flat metal fitting is provided on the side surface of the pipe, the installation can be realized without this becoming an obstacle. Therefore, since the metal fitting does not become an obstacle, the pipe repair device to which the present invention is applied can be particularly applied to many drain pipes of expressways. Furthermore, according to the present invention, since the contact plate and the casing portion are configured not to separate from each other, the parts of each component can be configured as a single set without spreading. Therefore, the work burden of the operator assembling the parts at the site can be reduced, and since each component does not become discrete, it is also advantageous in terms of transportation and management.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0026] Hereinafter, a pipe repair device to which the present invention is applied and a method of disposing the same will be described in detail with reference to the drawings.

[0027] FIG. 1 is a perspective view showing a state where a pipe repair device 1 to which the present invention is applied is disposed in a drain pipe 4 to be repaired.

[0028] The drain pipe 4 is provided, for example, to discharge rainwater, snow melting agents, and other water accumulated on a highway, and has a pipe 41 extending in the vertical direction and a pipe 42 that bends at a substantially right angle from the pipe 41 and extends in a substantially horizontal direction. A circular flange 46 that is flat and has an enlarged diameter is provided at the downstream end of the pipe 42, and can be fastened to the circular flange of another pipe (not shown) via a fastening member such as a bolt through a bolt hole 47 formed in the circular flange 46. Metal fittings 43 with flat surfaces substantially in the horizontal direction are attached to both side surfaces of the pipe 42, and a threaded rod 44 extending downward from the bottom of the highway is inserted into a hole 43a formed in the metal fitting 43. The flat metal fitting 43 in a state where the threaded rod 44 is inserted through the hole 43a is clamped and fixed from above and below via nuts 45, thereby preventing the pipe 42 itself from falling.

[0029] According to the drain pipe 4 having such a configuration, the water accumulated on the highway can flow from the pipe 41 to the pipe 42 from the upstream side to the downstream side.

[0030] The pipe repair device 1 to which the present invention is applied is disposed from the bottom surface side of the pipe 42 in such a drain pipe 4. When a defective part occurs in the pipe 42 due to, for example, corrosion, the pipe repair device 1 is applied and covered from the bottom surface side of the pipe 42 so as to cover the defective part, thereby preventing water leakage from the defective part.

[0031] FIG. 2 is a perspective view of the pipe repair device 1, FIG. 3 is a plan view of the pipe repair device 1, FIG. 4 is a side view of the pipe repair device 1, and FIG. 5 is a front view of the pipe repair device 1.

[0032] The pipe repair device 1 includes a casing part 11, an elastic member 13 and a backup material 17 formed on the inner surface of the casing part, a flange part 12 formed at both side ends of the casing part 11, and a contact plate 16 disposed via two or more bolts 14 spaced apart from the flange part 12.

[0033] The casing part 11 has an inner surface with a substantially concave curved cross-section when viewed from the front. The casing part 11 is configured to extend as it is while maintaining the cross-section of the substantially concave curved surface in the A direction from the upstream side to the downstream side in the figure during installation. That is, the casing part 11 is configured to be semi-circular tubular. It is desirable that the outer edge on the upstream side of the casing part 11 is formed in an arc shape when viewed from the vertical direction as shown in the plan view of FIG. 3. Further, it is desirable that the outer edge of the casing part 11 has a shape in which the diameter increases vertically from the upstream side to the downstream side when viewed from the side direction as shown in the side view of FIG. 4. Note that the material of the casing part 11 may be any metal.

[0034] The flange part 12 is composed of flat plates continuously extending outward substantially horizontally from both side ends of the casing part 11. A plurality of through holes 24 for inserting bolts 14a are formed on the upstream side, and one or more through holes 25 for inserting bolts 14b are formed on the downstream side. The shape of the flange part 12 in plan view is not limited to a specific one, but for example, a concave part 12a processed in a concave shape may be formed. In such a case, the through holes 24 and 25 are formed in a state of sandwiching the concave part 12a. Note that the flange part 12 is made of metal integrated with the casing part 11.

[0035] The elastic member 13 is adhered to the inner surface of the casing part 11 in a state of being elastically deformed along the inner surface having a substantially concave curved cross section. The elastic member 13 may be made of, for example, rubber. In particular, by using a rubber sheet with a low hardness, it is easy to conform to the surface of the casing part 11, and regardless of the state of the defective part of the pipe 42 to be contacted, the same construction quality can be maintained without being affected by it.

[0036] The backup material 17 is adhered to the downstream side of the elastic member 13 in the casing part 11. The backup material 17 is adhered to the inner surface of the casing part 11 in a state of being elastically deformed along the inner surface having a substantially concave curved cross section. The backup material 17 is preferably made of a material with higher viscosity than the elastic member 13, and for example, a butyl tape may be used. Also, the thickness of the backup material 17 is preferably made thicker than that of the elastic member 13. Note that the configuration of the backup material 17 is not essential and may be omitted. In such a case, the elastic member 13 will be extended to the downstream side where the backup material 17 should be formed.

[0037] The contact plate 16 is made of a metal plate material, and is preferably processed so that the plate thickness is thicker than that of the flange part 12. By configuring the plate thickness of the contact plate 16 to be, for example, 16 mm or more, the rigidity can be increased, and as will be described later, stable and firm attachment can be realized when arranging it on the pipe 42. Since it is not easy to perform cutting on the contact plate 16 with a thick plate thickness, as shown in FIG. 4(b), two contact plates 16-1 and 16-2 with a thin plate thickness may be overlapped with each other. At this time, the contact plates 16-1 and 16-2 may be fixed to each other via an adhesive, a double-sided tape, or the like.

[0038] Further, the contact plate 16 is configured such that its longitudinal direction extends in the A direction in the drawing. Also in this contact plate 16, for example, a recessed portion 16a processed in a concave shape may be formed. The contact plate 16 has a long hole 21 and a groove portion 22. These long holes 21 are sized such that the legs of the bolt 14a can be inserted therethrough, and the groove portion 22 is sized such that the legs of the bolt 14b can be inserted therethrough. These long holes 21 and groove portion 22 extend such that their longitudinal directions are in the A direction as shown in FIGS. 2 and 3. The groove portion 22 is in a form that extends in the longitudinal direction and is open on the downstream side.

[0039] The leg of the bolt 14a is inserted through the long hole 21 and the through hole 24, and its head is locked to the surface of the contact plate 16. The nut 15a is screwed onto the lower end of the leg protruding from the flange portion 12 of the bolt 14a. By turning the nut 15a in the screwed state, it becomes possible to bring the contact plate 16 and the flange portion 12 closer to each other via the bolt 14a and the nut 15a.

[0040] The leg of the bolt 14b is inserted through the groove portion 22 and the through hole 25, and its head is locked to the surface of the contact plate 16. The nut 15b is screwed onto the lower end of the leg protruding from the flange portion 12 of the bolt 14b. By turning the nut 15b in the screwed state, it becomes possible to bring the contact plate 16 and the flange portion 12 closer to each other via the bolt 14b and the nut 15b.

[0041] At this time, by inserting the bolts 14a and 14b through the long hole 21 and the groove portion 22 that extend such that their longitudinal directions are in the A direction as described above, it becomes possible to shift the relative position of the contact plate 16 with respect to the bolts 14a and 14b in the A direction or the exact opposite direction.

[0042] Also, while screwing the bolt 14a onto the nut 15a, by inserting the long hole 21 of the contact plate 16 through the leg thereof, it is possible to prevent the contact plate 16 from separating from the casing portion 11 via the bolt 14a. In other words, the long hole 21 and the bolt 14a can be configured as a set in which the contact plate 16 and the casing portion 11 do not separate from each other.

[0043] Further, by moving the contact plate 16 with the bolt 14a inserted through the long hole 21 in the direction exactly opposite to the A direction, the bolt 14b can be configured to be freely detachable from the groove portion 22. Even if the bolt 14b has deviated from the groove portion 22, it is possible to prevent the contact plate 16 and the casing portion 11 from separating from each other and falling apart via the long hole 21 and the bolt 14a. Also, during installation, by moving the contact plate 16 with the bolt 14a inserted through the long hole 21 in the A direction, it becomes possible to fit the bolt 14b into the groove portion 22.

[0044] Next, the operation of disposing the pipe repair device 1 having the above-described configuration from the bottom surface side of the pipe 42 in the drain pipe 4 will be described.

[0045] First, as shown in Fig. 6(a), the pipe repair device 1 is applied from below to the defect formed on the bottom surface side of the pipe 42. At this time, the operation is performed so that the elastic member 13 in the pipe repair device 1 exactly contacts the repair location that contacts the defect. At this stage, although the nut 15a is pre-screwed onto the leg of the bolt 14a and the nut 15b is pre-screwed onto the leg of the bolt 14b, they are in a loose state before tightening. Also, the bolt 14a is inserted into one of the through holes 24 formed in the flange portion 12, which is more suitable in terms of workability. Also, not only one bolt 14a and bolt 14b but also two or more bolts may be inserted.

[0046] Further, the flange portion 12 is located below the fitting 43, and the contact plate 16 is located above the fitting 43. In other words, the fitting 43 is arranged so as to be sandwiched from above and below by these flange portion 12 and contact plate 16. At this time, the bolt 14a is arranged upstream of the fitting 43, and the bolt 14b is arranged downstream of the fitting 43. As a result, the fitting 43 will be located between the bolts 14a and 14b.

[0047] In order to realize such an arrangement, as shown in Fig. 6(a), by moving the contact plate 16 in the direction exactly opposite to the A direction, the bolt 14b is made to abut on the repair location of the elastic member 13 in the pipe repair device 1 in a state of deviating outside the groove portion 22. Then, as shown in Fig. 6(b), by moving the contact plate 16 in the A direction, the bolt 14b may be fitted into the groove portion 22. Thereby, while preventing the contact plate 16 and the casing portion 11 from separating from each other and becoming loose via the long hole 21 and the bolt 14a, the bolt 14b can be fitted into the groove portion 22.

[0048] Note that by providing the concave portions 16a and 12a described above in the contact plate 16 and the flange portion 12, contact with the bolt 45 can be avoided, and it is possible to prevent the bolt from becoming an obstacle in the process of installation.

[0049] Next, the bolt 14a and the nut 15a, and the bolt 14b and the nut 15b are wound around each other and tightened. As a result, the flange portion 12 and the contact plate 16 will gradually approach each other. And in the process of this approach, as shown in Fig. 1, the bottom surface of the contact plate 16 is in surface contact with the upper surface of the flat fitting 43.

[0050] In a state where the contact plate 16 and the fitting 43 are in surface contact, the bolt 14a and the nut 15a, and the bolt 14b and the nut 15b are further tightened. As a result, stress due to surface contact is generated between the contact plate 16 and the fitting 43, and they can exert reaction forces on each other.

[0051] By applying this reaction force, the contact plate 16 can be fixed to be parallel to the metal fitting 43. In this state, by further tightening the bolt 14 and the nut 15, the flange portion 12 will approach in parallel following the contact plate 16. As the flange portion 12 approaches, the elastic member 13 in the casing portion 11 continuous with this flange portion 12 will come into surface contact with the repair location, and further, this elastic member 13 will press against the repair location.

[0052] In the state where the final tightening of the bolt 14 and the nut 15 is completed, the flange portion 12 is fixed in a state of approaching in parallel following the contact plate 16 to which the reaction force from the metal fitting 43 is applied, and the elastic member 13 of the casing portion 11 continuous with this flange portion 12 firmly comes into surface contact with the repair location and is fixed in a state of pressing it. In order to realize such surface contact of the elastic member 13, it is a prerequisite to design the curvature of the casing portion 11 to correspond to the curvature of the pipe 42.

[0053] As a result, the damaged portion at the repair location is covered in a state of being pressed by the elastic member 13 of the casing portion 11, so that it is possible to firmly prevent water flowing from upstream to downstream from leaking out. In particular, based on the tightening force by the bolt 14 and the nut 15 described above, since the flange portion 12 and the casing portion 11 continuous with this flange portion 12 are firmly fixed so as to follow the contact plate 16 to which the reaction force from the metal fitting 43 is applied, it is possible to prevent it from easily coming off, and the damaged portion can be stably protected over a long period of time.

[0054] In addition, even when the piping repair device 1 to which the present invention is applied has a flat metal fitting 43 provided on the side surface of the pipe 42, it can be attached so as to be clamped by the contact plate 16 and the flange portion 12. As a result, the piping repair device 1 can be installed without the metal fitting 43 becoming an obstacle. Therefore, such a metal fitting 43 is often provided in the pipe 42 of the drain pipe of the highway in particular, but the piping repair device 1 to which the present invention is applied can be applied to many of the drain pipes of the highway in particular because the metal fitting 43 does not become an obstacle. In particular, according to the present invention, there is also an advantage in that a strong attachment to the pipe 42 can be realized by utilizing the reaction force obtained by bringing the metal fitting 43 into contact with the contact plate 16 and tightening and fixing it.

[0055] Furthermore, according to the present invention, since the contact plate 16 and the casing portion 11 are configured not to separate from each other via the long hole 21 and the bolt 14a, the parts of each component can be configured as a single set without spreading. Therefore, the work burden of the operator assembling the parts at the site can be reduced, and since each component does not become discrete, it is also superior in terms of transportation and management.

[0056] In addition, according to the present invention, a backup material 17 is provided on the downstream side of the elastic member 13 in the casing portion 11. At the time of installation, the backup material 17 comes into contact with a circular flange 46 provided at the downstream end portion of the pipe 42. The backup material 17 is made of a material having higher viscosity than the elastic member 13, so that it can elastically deform following the shape when contacting the circular flange 46, and the adhesion can be enhanced. As a result, water leakage from the gap between the circular flange 46 and the backup material 17 can be more effectively suppressed.

[0057] As shown in FIG. 7, the elastic member 13 may be configured to protrude from the casing portion 11 toward the upstream side in the direction opposite to the downstream side. As a result, the protruding elastic member 13 covers up to the vicinity of the joint between the pipe 41 and the pipe 42, and water leakage can be more firmly prevented.

[0058] Note that the present invention is not limited to the above-described embodiments. The groove portion 22 is not limited to a form that extends in the longitudinal direction and is open on the downstream side. For example, as shown in FIG. 8, the position where it is open may be different. In the form of FIG. 8, the groove portion 22' extends in the A direction in the figure, but the outer side portion may be open with respect to the A direction. According to such a groove portion 22', with the bolt 14a as the rotation axis, the contact plate 16 can be rotated in the B direction in the figure so that the bolt 14b can be fitted into the groove portion 22'. In such a form of the groove portion 22', it can be said that it is particularly useful when it is necessary to fit the bolt 14b by rotating the contact plate 16 in the B direction in the figure due to the positional relationship of the fitting 43 or the like during installation.

[0059] FIG. 9(a) shows a form in which the bolt 14 is inserted through the cylindrical body 31, and FIG. 9(b) shows a form in which the bolt 14 is inserted through the compression coil spring 32.

[0060] By inserting and fastening the bolt 14 through the cylindrical body 31, the looseness of the bolt can be prevented by effectively expressing the axial force accompanying the fastening. Similarly, by providing the compression coil spring 32, a reaction force against the pressing force on the compression coil spring 32 is applied between the bolt 14 and the nut 15, so that looseness can be effectively prevented and the axial force can be maintained for a long time. As shown in FIG. 10, both the cylindrical body 31 and the compression coil spring 32 may be inserted through the bolt 14. Of course, as an alternative to the compression coil spring 32, it may be replaced with any elastic body that can generate a reaction force against the pressing force between the bolt 14 and the nut 15.

[0061] Further, according to the present invention, as shown in FIG. 11(a), a fitting 35 for a wire may be attached to the through-hole 24 formed in the flange portion 12. A wire 36 is fastened to this fitting 35 for a wire. The wire 36 is configured to be annular. By locking such an annular wire 36 to a threaded rod 44 as shown in FIG. 11(b), it is possible to prevent the pipe repair device 1 from falling in an emergency.

[0062] FIG. 12 shows an example in which the elongated holes 21' and the groove portion 22' are provided in the flange portion 12 instead of the contact plate 16. Through-holes 24' and 25' are provided in the contact plate 16.

[0063] Similarly in such a case, the bolt 14a is inserted into the elongated hole 21', and the bolt 14b is inserted into the groove portion 22'. Then, by tightening the nut 15 screwed onto these bolts 14, it is similarly possible to bring the contact plate 16 and the flange portion 12 close to each other. Further, during actual installation, by moving the flange portion 12 (casing portion 11) in the direction exactly opposite to the A direction, the bolt 14b is made to deviate outside the groove portion 22' and brought into contact with the repair portion of the elastic member 13 in the pipe repair device 1, and then by moving the flange portion 12 (casing portion 11) in the A direction, it is possible to fit the bolt 14b into the groove portion 22'.

[0064] In the above-described embodiment, the case where the pipe repair device 1 is disposed at a defective portion or the like of the pipes 41 and 42 constituting the drain pipe 4 of the expressway 7 has been described as an example, but the present invention is not limited thereto, and it goes without saying that the pipe repair device 1 may be disposed at a defective portion of any pipe other than the expressway 7.

Explanation of Reference Numerals

[0065] 1 Pipe repair device 4 Drain pipe 7 Expressway 11 Casing portion 12 Flange portion 13 Elastic member 14 Bolt 15 Nut 16 Contact plate 17 Backup material 21 Long hole 22 Groove part 24, 25 Through hole 31 Cylinder 32 Compression coil spring 35 Fitting for wire 36 Wire 41, 42 Pipe 43 Fitting 44 Threaded rod 45 Nut 45 Bolt 46 Circular flange 47 Bolt hole

Claims

1. In a pipe repair device disposed at a repair location of a pipe, a casing portion having an inner surface formed in a substantially concave curved surface shape, an elastic member formed on the inner surface of the casing portion, flange portions formed at both side ends of the casing portion, and a contact plate disposed via two or more fastening members while being spaced apart from each of the flange portions. A pipe repair device characterized by the above.

2. The contact plate has a long hole into which at least one of the fastening members is inserted and a groove portion into which the other fastening member is inserted. The pipe repair device according to claim 1, characterized by the above.

3. The flange portion has a long hole into which at least one of the fastening members is inserted and a groove portion into which the other fastening member is inserted. The pipe repair device according to claim 1, characterized by the above.

4. The contact plate is formed by laminating two or more metal plates. The pipe repair device according to claim 1, characterized by the above.

5. The pipe repair device according to claim 1 further includes a cylindrical body through which a bolt as the fastening member is inserted. The pipe repair device according to claim 1, characterized by the above.

6. The pipe repair device according to claim 1 or 3 further includes an elastic body through which a bolt as the fastening member is inserted. The pipe repair device according to claim 1 or 3, characterized by the above.

7. The flange portion is inclined toward the downstream side of the pipe to be disposed. The pipe repair device according to claim 1, characterized by the above.

8. On the downstream side of the elastic member on the inner surface of the casing portion, a backup material having higher viscosity than the elastic member is formed. The pipe repair device according to claim 7, characterized by the above.

9. The elastic member protrudes more than the casing portion toward the upstream side in the direction opposite to the downstream side. The pipe repair device according to claim 7, characterized by the above.

10. A wire fitting attached to a hole formed in the flange portion, and a wire tightly coupled to the wire fitting and configured at least in a ring shape. The pipe repair device according to claim 1 further includes the above.

11. In a method of disposing a pipe repair device at a repair location of a pipe, while bringing the casing portion in the pipe repair device according to claim 1 into contact with the repair location of the pipe, bringing the contact plate into contact while positioning a flat metal fitting provided on the side surface of the pipe between the fastening members. By further fastening the fastening member, the flange portion and the contact plate abutted against the metal fitting are clamped via the fastening member in a state where they are separated from each other to be fixed. A method of disposing a pipe repair device, characterized by the above.

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