JP6811034B2 - Closure repair structure and closure repair method - Google Patents

Description

The present invention relates to a closure repair structure and a closure repair method.

Conventionally, closures that cover and protect the connection portion of a communication cable have been known. Gas such as air and nitrogen gas is pressurized and supplied to the inside of the closure through a cable, and the pressurized gas prevents water from entering the inside of the closure.

Patent Document 1 describes a gas leak repair method for a cable connection portion protective case including a tubular sleeve accommodating a connection portion of a communication cable and end face plates attached to both ends of the sleeve. In this gas leak repair method, a cable located on the outside of the end face plate is sandwiched between two semi-circular molds. Then, after pressing the two molds against the end face plate, the inside of the mold is filled with liquid urethane foam from the injection port formed in the upper mold, and the urethane foam is cured to cause gas leakage. To repair. After curing the urethane foam, the formwork is removed to complete the repair.

Japanese Unexamined Patent Publication No. 5-146026

In the repair method described in Patent Document 1, a liquid urethane foam is filled inside the mold, and the gas leak portion is closed by the foam curing of the urethane foam. In this repair method, if repair is performed in a state where the gas is leaking, a path for the leaked gas is formed when the liquid urethane foam is filled, and there may be a problem that the gas leak is not eliminated in the end. In this case, it is necessary to identify the location of the gas leak and make further repairs. In this way, the gas leak repair work may be inadequate.

Therefore, it is desired that the gas leak repair work can be easily and surely performed.

The closure repair structure according to one embodiment of the present invention has a tubular sleeve for accommodating a connection portion to which at least two cables are connected, and a hole for passing the cable, and the cable is passed through the hole. A closure repair structure provided with an end face plate that seals the sleeve with, a filling member arranged to face the closure end face having a leak portion, and pressurization that pressurizes the filling member from the outside of the end face plate. It includes a member and a spring member that presses the pressurizing member toward the filling member.

According to such a form, the filling member is arranged on the end face of the closure having the leakage portion, and the filling member is pressurized from the outside by the pressurizing member. Therefore, the leakage of gas from the leaking portion can be stopped by filling the leaking portion with the filling member and pressurizing the filling member with the pressurizing member. By pressurizing the filling member on the pressurizing member in this way, it is possible to easily and surely repair the gas leak leaking from the leaking portion. Further, when the above-mentioned filling member is used for a long period of time, it may expand or contract due to a temperature change or a creep phenomenon, so that a stable pressing force can be maintained even if the filling member is pressurized by the pressing member. There is a concern that it will disappear. However, according to this embodiment, since the spring member for pressing the pressurizing member toward the filling member is provided, even if the filling member expands or contracts, the spring member expands and contracts to expand or contract the filling member. By absorbing, a stable pressing force can be maintained for a long period of time. Therefore, since the pressing force can be stabilized for a long period of time, the life of the repair structure can be extended and gas leakage that may occur in the future can be prevented.

In the repair structure according to another form, a plurality of spring members may be arranged point-symmetrically or line-symmetrically with respect to the cable.

In the repair structure according to another form, the filling member may be a mixed material of silicone putty and silicone rubber.

In the repair structure according to another form, the rubber hardness of the silicone rubber may be lower than the rubber hardness of the silicone putty.

In the repair structure according to another form, the weight ratio of the silicone rubber to the entire mixed material may be 30% or more and less than 50%.

In the repair structure according to another form, the pressurizing member includes a pushing member that pushes the filling member while being attached to the outer periphery of the cable, and a sliding member that slides along the cable to pressurize the pushing member. The push-in member may have a plurality of cutting lines extending in the extending direction of the cable.

In another form of repair structure, the indentation member may include a plurality of covering members that are detachably stacked on top of each other in the radial direction of the cable.

In the repair structure according to another form, each covering member may be provided with at least one of a latch portion for hooking another covering member in an overlapping manner and an engaging hole for hooking the latch portion.

In the repair structure according to another form, the latch portions of the covering members may be arranged at positions offset from each other.

In the repair structure according to another form, each latch portion may project radially outward.

In the repair structure according to another form, a protrusion that abuts on the pushing member may be formed on the inner peripheral surface of the sliding member.

In the repair structure according to another form, the protrusions may have a corrugated shape in which irregularities are arranged in the radial direction.

In the repair structure according to another form, the protrusion may have a plurality of cutting lines extending in the extending direction of the cable.

In the repair structure according to another form, the portion of the protrusion that the pushing member abuts may be formed to be deeply recessed toward the outer side in the radial direction.

The method for repairing a closure according to an embodiment of the present invention has a tubular sleeve for accommodating a connection portion to which at least two cables are connected, and a hole for passing the cable, and the cable is passed through the hole. A method of repairing a closure equipped with an end face plate for sealing a sleeve, in which a filling member is arranged in a hole, a pressurizing member is arranged, and a spring member is arranged and pressed by the spring member. It includes a step of pressing the member toward the filling member.

According to such a form, the filling member is arranged in the hole of the end face plate, the filling member is pressed from the outside by the pressing member, and the spring member further presses the pressing member toward the filling member. There is. Therefore, as with the repair structure described above, even if the filling member expands or contracts due to long-term use, the spring member expands and contracts to absorb the expansion or contraction of the filling member, so that the pressing force is stabilized for a long period of time. At the same time, the gas leak repair work can be easily and surely performed.

In the repair method according to another form, a step of cutting the convex portion protruding inside the hole portion with a cutting jig may be further provided before the step of arranging the filling member.

In a repair method according to another embodiment, the cutting jig includes a fixing portion fixed to at least one of an end face plate and a sleeve, and a cutting portion attached to the fixing portion, and is fixed in the cutting process. The convex portion may be cut by attaching the cutting portion to the portion and screwing it.

In the repair method according to another form, the inner peripheral surface of the cutting portion is formed with a concave portion recessed outward in the radial direction, and in the cutting step, the shavings of the convex portion may be passed through the concave portion.

In the repair method according to another form, a step of mixing powdered silicone rubber with the silicone putty to generate a filling member may be further provided before the step of arranging the filling member.

According to the present invention, the gas leak repair work can be easily and surely performed.

It is a perspective view which shows the repair structure of the closure which concerns on 1st Embodiment. It is a perspective view which shows disassembled the repair structure of FIG. It is sectional drawing which shows the repair structure of FIG. (A) is a perspective view which shows the initial state of a closure before attaching a repair structure. (B) is a front view of FIG. 4 (a) as viewed from the end face plate side. FIG. 4A is a perspective view showing a state in which the closure of FIG. 4A is filled with a filling member. (B) is a front view of FIG. 4 (a) as viewed from the end face plate side. It is a perspective view which shows the state which attached the ring and the hook plate to the closure of FIG. 5A. It is a perspective view which shows the state which the washer and the slider are attached to the closure of FIG. It is a perspective view which shows the state which attached the spring member to the closure of FIG. It is a perspective view which shows the experimental apparatus which verifies the repair structure of FIG. (A) is a perspective view which shows the pressing member of the experimental apparatus of FIG. (B) is a perspective view showing a housing member of the experimental device of FIG. (C) is a perspective view showing the internal structure of the accommodating member. (A) is a perspective view which shows the arrangement of the sensor in the accommodating member. (B) is a perspective view which shows the pressing of the pressing member against the filling member accommodated in the accommodating member. (A) is a perspective view showing a state in which a screw is tightened on a pressing member. (B) is a perspective view showing a state in which a spring member is further attached to the pressing member. It is a graph which shows the relationship between the displacement of the filling member and the repulsive force which concerns on 2nd Embodiment for each addition rate of silicone rubber. It is a graph which shows the relationship between the addition rate of silicone rubber and the height ratio of a filling member. It is a perspective view which shows the washer and the slider which concerns on 3rd Embodiment. (A) is a perspective view showing a washer and a slider. (B) is a perspective view showing a state in which a washer and a slider are attached. It is a side view which saw the slider from the outside in the axial direction. It is a perspective view which shows the state which disassembled a washer. It is sectional drawing which shows the latch part and the engagement hole of a washer. It is a vertical cross-sectional view of a slider and a washer which shows the part where a washer comes into contact with a slider. (A) is a perspective view showing a slider and a washer. (B) is a side view of the slider and washer as viewed from the outside of the end face plate. (A) is a perspective view showing a protrusion cut in the radial direction and a washer cut in the circumferential direction and the radial direction. (B) is a side view of the protrusion and the washer of FIG. 22 (a) as viewed from the outside in the axial direction. It is sectional drawing which shows the closure before attaching the repair structure which concerns on 4th Embodiment. It is a perspective view which shows the cutting part of a cutting jig. It is a perspective view which shows the fixing part of a cutting jig. (A) is a perspective view showing a state in which the fixing portion is fixed to the closure of FIG. 23. (B) is a perspective view showing a state in which a cutting portion is attached to the closure of FIG. 26 (a). FIG. 26A is a perspective view showing a state in which the cutting portion of FIG. 26B is attached. (B) is a perspective view showing a state before cutting a convex portion by a cutting portion. It is a perspective view which shows the state which cuts a convex part by turning a cutting part. It is sectional drawing which shows the closure which the convex part was cut. It is a perspective view which shows the spring member and a slider which concerns on a modification. It is a perspective view which shows the repair structure which concerns on 5th Embodiment. It is sectional drawing which shows the repair structure of FIG. It is a vertical sectional view of the repair structure of FIG. It is a perspective view which shows the state which the repair structure of FIG. 31 is attached. (A) is a perspective view showing a state in which the repair structure of FIG. 31 is attached. (B) is a front view showing the positional relationship between the end face plate and the push-in bolt.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and duplicate description will be omitted.

(First Embodiment)
The repair structure according to the first embodiment will be described. The term "repair" as used herein includes eliminating gas leaks from closures, reducing leaks to the extent that there are no problems in use, and preventing gas leaks from closures in advance, ie, closures. Includes gas leak countermeasures from. Various types of closures can be mentioned. Specifically, as shown in FIGS. 1 to 3, a closure 1 that protects the connection portion of the cable C for communication can be mentioned, and the closure 1 protects the connection portion of the cable C extending underground. Provided for.

First, the structure of closure 1 will be described. The closure 1 is formed by fixing two semi-cylindrical sleeves 2 to each other by screws 3 of a band member 5, and has an overall cylindrical shape. The sleeve 2 accommodates at least two or more cable C connections. The material of the sleeve 2 is, for example, polypropylene. The sleeve 2 constitutes the side surface of the cylindrical closure 1.

The sleeve 2 includes a plurality of ribs 2a arranged side by side along the longitudinal direction of the closure 1 (the axial direction of the closure 1 and the extending direction of the cable C), and each rib 2a extends in the circumferential direction of the closure 1. Exists. Further, the screws 3 of the band member 5 are arranged side by side along the longitudinal direction of the closure 1. In the following description, the axial direction of the closure 1, the radial direction of the closure 1, and the circumferential direction of the closure 1 may be simply the axial direction, the radial direction, and the circumferential direction, respectively.

Disk-shaped end face plates 4 are provided at both ends of the closure 1 in the longitudinal direction, and the sleeve 2 is sealed by the two end face plates 4. The end face plate 4 includes a circular hole 4a through which the cable C is passed. The diameter of the hole 4a is larger than the outer diameter of the cable C. Further, the end face plate 4 is formed by bolting two semicircular side wall members 4b.

A sealing tape is interposed between the two side wall members 4b, and the airtightness between the two side wall members 4b is ensured by the sealing tape. This sealing tape is in the form of putty, and examples of the material of the sealing tape include butyl rubber. Further, an airtight tape T1 that closes a gap between the hole 4a of the end face plate 4 and the cable C is wound around the cable C. The airtight tape T1 is made of rubber, for example.

The end face plate 4 of FIG. 3 is provided with only one hole 4a, but the shape and number of the end face plate and its holes are appropriately adjusted according to the number of cables C extending from the closure 1 or the type of the cable C. It can be changed. There are various types of end face plates. Specifically, for example, the cable may extend from the connecting portion of the cable in a bifurcated or trifurcated manner, and in such a case, the number of holes provided in the end face plate is two or three.

Pressurized nitrogen gas or gas such as air is supplied to the inside of the sleeve 2 through the cable C, and the inside of the sleeve 2 is made to have a high atmospheric pressure by this gas, so that water to the inside of the sleeve 2 is made. Invasion is blocked. Further, a gasket for maintaining airtightness is provided between the sleeve 2 and the end face plate 4.

A band member 5 is wound around the outer circumference of the sleeve 2, and a plurality of band members 5 are arranged side by side in the longitudinal direction of the closure 1. These band members 5 are provided for tightening the sleeve 2 having a high atmospheric pressure inside with a screw 3 from the outside, and are made of, for example, stainless steel.

In the closure 1 configured as described above, due to deterioration over time or the like, between the cable C and the hole 4a of the end face plate 4 (where the airtight tape T1 is provided), between the end face plate 4 and the sleeve 2, or Gas may leak from a leaking portion located between the two side wall members 4b constituting the end face plate 4. Here, the leaking portion is a portion where the gas sealed in the sleeve 2 can leak, such as between the cable C and the hole portion 4a, between the end face plate 4 and the sleeve 2, or between the two side wall members 4b. Is shown.

When a gas leak from the leaked portion of the closure 1 is detected, it is necessary to perform repair work to close the leaked portion and eliminate the gas leak. Examples of the method of identifying the leaked portion include a method of adhering a liquid such as soapy water to the surface of the closure 1 and confirming whether or not foaming occurs.

Next, the repair structure 10 used in the above-mentioned repair work of the leaked portion will be described. Note that FIGS. 1 to 3 show a repair structure 10 for repairing the leaked portion L1 located in the gap between the cable C and the hole 4a. The repair structure 10 is between the fixing member 11 fixed to the end face plate 4, the slider 12 (sliding member) movably supported by the fixing member 11 in the extending direction of the cable C, and the slider 12 and the cable C. A washer 13 (pushing member) interposed therein, a filling member 14 covering the gap between the hole 4a of the end face plate 4 and the cable C, and a plurality of springs for pressing the slider 12 along the extending direction of the cable C. It includes a member 15.

The fixing member 11 includes a hook plate 11a fixed to the end face plate 4 and a ring member 11b to which the hook plate 11a is fixed. The ring member 11b includes a semicircular annular ring member 11c, and the annular ring member 11b is formed by joining the two side wall members 11c from the side of the cable C. Further, the ring member 11b includes screw holes 11d for screwing the screw rod 15a of the spring member 15, and four screw holes 11d are arranged at equal intervals in the circumferential direction. These screw holes 11d are exposed to the outside in the axial direction, and the screw rod 15a is screwed in from the outside in the axial direction.

The slider 12 includes a semicircular annular side wall member 12a, and is formed in an annular shape by joining two side wall members 12a from the side of the cable C. Each side wall member 12a is provided with a flange portion, and the flange portion is provided with a hole portion 12c through which the screw rod 15a is inserted. When the two side wall members 12a are joined, four holes 12c are arranged at equal intervals in the circumferential direction.

The washer 13 is formed in an annular shape. The washer 13 is a member that enters between the cable C and the slider 12, and is provided to completely transmit the pressing force of the slider 12 to the exposed surface of the filling member 14. As the slider 12 moves, the end surface of the slider 12 abuts on the surface of the washer 13 in the axial direction, and the washer 13 evenly presses the filling member 14 from the outside in the axial direction by this abutting.

The filling member 14 may be made of a material that is clay-like at the time of filling and hardens like rubber after filling. As the filling member 14, a curable elastic resin that becomes rubber-like by reacting the two liquids can be used, and for example, a silicone-based material can be used. The filling member 14 is embedded in the gap between the hole 4a of the end face plate 4 and the cable C and is pressed from the outside in the axial direction to seal the gap. When the filling member 14 is a clay-like material at the time of filling and is a material that flows when pressurized, the cable C is formed in the hole 4a by pushing the filling member 14 between the hole 4a and the cable C. The filling member 14 can be filled by bringing the filling member 14 into close contact with the surface of the airtight tape T1. For example, the filling member 14 according to the present embodiment is preferably clay-like, soft enough to be easily changed in shape by hand, and clay to the extent that leaked gas cannot penetrate.

The spring member 15 is, for example, a compression coil spring. The spring member 15 is provided on the side opposite to the end face plate 4 of the slider 12 in the extending direction of the cable C. A plurality of spring members 15 are arranged so as to be arranged at equal intervals in the circumferential direction of the slider 12, and in the present embodiment, for example, four spring members 15 are arranged. Each spring member 15 includes a screw rod 15a extending in the extending direction of the cable C, a spring 15b through which the screw rod 15a is inserted, and a washer 15c inserted into the screw rod 15a on the opposite side of the spring 15b from the slider 12. A nut 15d provided on the opposite side of the washer 15c from the spring 15b and screwed into the screw rod 15a is provided.

The screw rod 15a is provided with a male screw on its surface, and is inserted into the hole portion 12c of the slider 12 and the screw hole 11d of the fixing member 11. One end of the spring 15b in the axial direction is in contact with the washer 15c, and the other end of the spring 15b in the axial direction is in contact with the annular outer peripheral surface 12d of the slider 12. The outer peripheral surface 12d is an end surface provided on the opposite side of the slider 12 from the closure 1. The washer 15c is pushed in the extending direction of the cable C to adjust the screwing position of the nut 15d with respect to the screw rod 15a. Thereby, the length of the spring 15b extending in the axial direction can be adjusted, and the pressing force of the spring 15b can be adjusted.

Next, a repair method for forming the repair structure 10 and repairing the leaked portion L1 of the closure 1 will be described. In the initial state, as shown in FIGS. 4A and 4B, the airtight tape T1 is interposed between the hole 4a of the end face plate 4 and the cable C. First, as shown in FIGS. 5A and 5B, the leakage portion L1 formed in the portion between the hole 4a and the cable C is filled with the clay-like filling member 14. At this time, the filling member 14 is evenly filled on the outside of the airtight tape T1 to close the leakage portion L1 from the outside in the axial direction (step of arranging the filling member).

Next, as shown in FIG. 6, the fixing member 11 is fixed to the outside in the axial direction of the filling member 14. That is, the hook plate 11a is attached to the side wall member 11c and the two side wall members 11c are joined to form the ring member 11b, and the ring member 11b is fixed to the end face plate 4. Subsequently, the washer 13 is attached to the cable C and the washer 13 is inserted inside the fixing member 11, so that the washer 13 is arranged outside the filling member 14 in the axial direction. After the washer 13 was arranged, as shown in FIG. 7, two side wall members 12a were joined from the side of the cable C to form an annular slider 12, which was further engaged with the washer 13. It is later abutted against the filling member 14 (step of arranging the pressurizing member).

Then, as shown in FIG. 8, the screw rod 15a is inserted into the spring 15b and the washer 15c, the nut 15d is screwed into the screw rod 15a, and the spring 15b is pushed toward the closure 1 by the washer 15c. Then, the spring member 15 is attached to the slider 12 by inserting the screw rod 15a into the hole 12c of the slider 12 and the screw hole 11d of the fixing member 11 and screwing them together. By attaching the four spring members 15 to the slider 12 and pressing the slider 12 with the spring member 15 in this way (step of pressing the pressurizing member), the repair structure 10 is completed.

As described above, according to the repair structure 10 of the present embodiment, the filling member 14 is arranged on the end face of the closure 1 having the leakage portion L1, and the filling member 14 is pressed from the outside by the slider 12 and the washer 13. .. Therefore, the leakage of gas from the leakage portion L1 can be stopped by filling the leakage portion L1 with the filling member 14 and pressurizing the filling member 14 by the slider 12 and the washer 13. Therefore, the repair work of the gas leak leaking from the leak portion L1 can be easily and surely performed.

Further, the above-mentioned filling member 14 may expand or contract due to a temperature change or a creep phenomenon when used for a long period of time, whereby a stable pressing force is maintained even if the filling member 14 is pressurized by the slider 12. There is a concern that it will not be possible. However, according to the repair structure 10, the spring member 15 that presses the slider 12 toward the filling member 14 is provided. As a result, even if the filling member 14 expands or contracts, the spring member 15 expands and contracts to absorb the expansion or contraction of the filling member 14, so that a stable pressing force can be maintained for a long period of time. In this way, since the pressing force can be stabilized for a long period of time, the life of the repair structure 10 can be extended, and gas leakage that may occur in the future can be prevented.

Further, in the repair structure 10, a plurality of spring members 15 are arranged at positions that are point-symmetrical and line-symmetrical with respect to the cable C. By arranging the plurality of spring members 15 in this way, the slider 12 and the washer 13 can be pressed in a well-balanced manner by the plurality of spring members 15. Therefore, since the filling member 14 can be pressed in a well-balanced manner, the occurrence of gas leakage can be prevented more reliably. In order to exert such an effect, the plurality of spring members 15 may be arranged point-symmetrically or line-symmetrically with respect to the cable C.

Next, an experiment for verifying the effect of the spring member 15 described above will be described. In this experiment, a comparative verification is performed between a structure having a spring member and a structure having no spring member. In this experiment, the structure 20 shown in FIG. 9 is used. The structure 20 includes a housing member 21 that houses the filling member 14, and a pressing member 22 that pressurizes the filling member 14 housed in the storage member 21. In the repair structure 10 described above, the accommodating member 21 corresponds to the end face plate 4, and the pressing member 22 corresponds to the washer 13 and the slider 12 (pressurizing member) that pressurize the filling member 14.

As shown in FIGS. 9 and 10 (b), the accommodating member 21 is formed in a rectangular parallelepiped shape and has a square main surface 21 a. An annular groove 21b is formed on the main surface 21a, and the filling member 14 is filled in the groove 21b. FIG. 10C shows the shape of the internal space of the accommodating member 21 including the groove 21b, that is, the shape of the filling member 14 filled in the groove 21b, and the filling member 14 filled in the groove 21b is a stepped circle. It is said to be a ring. Further, the accommodating member 21 has four screw holes 21d into which a screw rod 23 described later is screwed into the main surface 21a, and each screw hole 21d is arranged near the four corners of the main surface 21a.

As shown in FIGS. 9 and 10 (a), the pressing member 22 includes a rectangular parallelepiped main body portion 22a and a protruding portion 22c projecting from the square main surface 22b of the main body portion 22a in an annular shape. There is. The shape of the top of the protruding portion 22c is similar to the shape of the groove 21b of the accommodating member 21, and the shape and size are such that the filling member 14 filled in the groove 21b can be pressed. Further, four insertion holes 22d through which the screw rod 23 is inserted are formed on the main surface 22b of the pressing member 22, and each insertion hole 22d is arranged near the four corners of the main surface 22b.

As shown in FIG. 11A, in the structure 20, a sensor 24 for detecting pressure is arranged on the bottom surface of the groove 21b of the accommodating member 21, and the groove 21b is filled with the filling member 14. At this time, the filling member 14 is mixed for 60 seconds and then filled in the groove 21b, and then the filling member 14 is cured over 60 minutes. Then, as shown in FIG. 11B, the protruding portion 22c is brought into contact with the groove 21b, and the pressing member 22 is pressed against the accommodating member 21.

Subsequently, as shown in FIG. 12A, the screw rod 23 is passed through each insertion hole 22d of the pressing member 22 with the screw rod 23 passed through the washer 25, and the screw rod 23 is passed through the screw of the accommodating member 21. Tighten into hole 21d. At this time, the screw rod 23 is tightened until the pressure detected by the sensor 24 reaches 3000 kPa to complete the structure 20B of the comparative example.

On the other hand, in the structure 20A of the embodiment, the spring 26 is attached as shown in FIG. 12B. Specifically, in the state where the screw rod 23 is passed through the washer 25, the spring 26, and the washer 27, the screw rod 23 is passed through each insertion hole 22d, and each screw rod 23 is tightened into the screw hole 21d of the accommodating member 21 in the embodiment. Structure 20A is completed.

After the structure 20A of the example and the structure 20B of the comparative example were completed as described above, a heat cycle test was performed and the internal pressure of the filling member 14 was detected by the sensor 24. Specifically, the structures 20A and 20B are placed in a constant temperature bath, and 20 ° C. (0.5 hours), 20 ° C.⇒60 ° C. (1.0 hours), 60 ° C. (1.0 hours), 60 ° C.⇒20. ℃ (1.0 hours), 20 ℃ (1.0 hours), 20 ℃ ⇒ -20 ℃ (1.5 hours), -20 ℃ (1.0 hours), -20 ℃ ⇒ 20 ℃ (1.0 hours) A plurality of cycles having 8 steps of time) were carried out. At this time, the filling member 14 expanded when the temperature was high to increase the internal pressure, and contracted when the temperature was low to reduce the internal pressure. When the internal pressure of the filling member 14 is reduced, there is a concern that gas leaks from the closure 1.

As a result of carrying out the above-mentioned cycle for 15 cycles in the structure 20B of the comparative example, the difference between the maximum value and the minimum value of the internal pressure of the filling member 14 was 1835 kPa on average, and the minimum value of the internal pressure of the filling member 14 was 182 kPa. .. On the other hand, as a result of carrying out the above-mentioned cycle three times in the structure 20A of the embodiment, the difference between the maximum value and the minimum value of the internal pressure of the filling member 14 is 705 kPa on average, and the minimum value of the internal pressure of the filling member 14 is It became 687 kPa.

As described above, in the structure 20A of the example having the spring 26, the above-mentioned difference in internal pressure was 705 kPa, which was reduced by nearly 60% with respect to the difference in internal pressure in the structure 20B of the comparative example. Further, in the structure 20A, the minimum value of the internal pressure could be increased to 687 kPa. Therefore, in the structure 20A having the spring 26, it was possible to suppress the fluctuation of the internal pressure of the filling member 14 due to the temperature change and to increase the minimum value of the internal pressure of the filling member 14. Therefore, even if the filling member 14 contracts, the pressing force by the spring 26 acts, so that the pressing force can be maintained even if the temperature changes, and the occurrence of gas leakage from the closure 1 can be avoided.

(Second Embodiment)
Next, the second embodiment will be described. The second embodiment is different from the first embodiment in that the filling member 14 to which silicone rubber is added is used. In the following, the description overlapping with the above-mentioned contents will be omitted as appropriate. The filling member 14 is required to have low hardness and high creep resistance in order to enhance the function of suppressing gas leakage. Here, the high creep resistance shows the property of being hard to be plastically deformed, that is, the property of returning to the shape before the compressive deformation even when the compressive force is lost for a long period of time. In the second embodiment, the filling member 14 is a two-component room temperature-cured silicone putty, which is produced by mixing powdered silicone rubber with the silicone putty.

The rubber hardness of silicone rubber is lower than the rubber hardness of silicone putty. Also, silicone rubber cures at a higher temperature than silicone putty. Therefore, when the silicone rubber is mixed with the silicone putty, a filling member 14 having a lower hardness and a higher creep resistance is produced. Further, the weight ratio of the silicone rubber to the entire filling member 14 which is a mixed material is, for example, 30% or more and less than 50%.

Next, a specific example of the method for producing the filling member 14 will be described. First, liquid silicone rubber is mixed and cured at 120 ° C. for 10 minutes to prepare a silicone rubber sheet having a thickness of 3 mm. Then, this silicone rubber sheet is secondarily crosslinked at 150 ° C. for 3 hours. For example, the shore A hardness of the silicone rubber is 5 degrees. Then, the above-mentioned silicone rubber sheet was freeze-crushed, and silica powder was added to the crushed silicone rubber in order to avoid agglomeration of the powder. Then, the silicone rubber powder was sieved with a 1 mm square mesh to produce the above-mentioned powdered silicone rubber.

Regarding the mixing of the powdered silicone rubber and the silicone putty, for example, a predetermined amount of silicone putty was put into a glass bottle, and then a predetermined amount of silicone rubber was put into the glass bottle. Then, inside the glass bottle, the main agent of the silicone putty and the silicone rubber, and the curing agent of the silicone putty and the silicone rubber are stirred and mixed by a mixer, and then these are further mixed and the mixture is packed in a stainless steel mold. A lid was placed on the mold and the silicone putty was cured over 24 hours to prepare a cylindrical filling member 14 having a diameter of 30 mm and a height of 13 mm. In the method for repairing the closure 1 according to the second embodiment, as described above, the silicone putty is mixed with powdered silicone rubber to form the filling member 14 (step of forming the filling member), and then the same as described above. , The leaking portion L1 is filled with the filling member 14 (step of arranging the filling member). After that, the same steps as in the first embodiment are executed.

Next, an experiment in which the elastic modulus of the filling member 14 is measured will be described. In this experiment, in order to measure the repulsive force of the filling member 14 produced as described above, the produced filling member 14 was compressed with a push-pull gauge. Specifically, the filling member 14 was compressed by sandwiching the filling member 14 between two discs having a diameter of 100 mm and moving one plate toward the other plate at a speed of 10 mm / min. The repulsive force of the filling member 14 was measured and recorded with this push-pull gauge. The result is shown in the graph of FIG.

As shown in FIG. 13, it was found that the higher the addition rate of the silicone rubber, the lower the repulsive force of the filling member 14 as a whole with respect to the displacement of the plate. Further, the two discs are arranged so as to be spaced by 10 mm, the filling member 14 is sandwiched between the two discs, compressed, and left at 90 ° C. for 72 hours, and then the two discs are placed. It was verified at what rate the filling member 14 did not return to its original state by removing it and cooling it at room temperature for 2 hours. The result is shown in the graph of FIG.

As shown in FIG. 14, when the addition rate of the silicone rubber is higher than that when the addition rate of the silicone rubber is 0%, especially when the addition rate of the silicone rubber is 30% or more, it cannot be restored. It was possible to reduce the height ratio of the filling member 14. That is, it was found that the higher the addition rate of the silicone rubber, the higher the creep resistance of the filling member 14.

As described above, in the closure repair structure and repair method according to the second embodiment, the filling member 14 is a mixed material of silicone putty and silicone rubber, and the rubber hardness of the silicone rubber is higher than the rubber hardness of the silicone putty. Is also low. By using the mixed material as the filling member 14 in this way, the filling member 14 having low hardness and higher creep resistance can be produced, so that the function of suppressing gas leakage by the filling member 14 can be enhanced. Further, since the filling member 14 can be produced only by mixing, the filling member 14 having low hardness and high creep resistance can be easily produced without changing the chemical composition.

Further, the weight ratio of the silicone rubber to the entire mixed material is, for example, 30% or more and less than 50%. By setting the weight ratio to 30% or more, the hardness of the filling member 14 can be lowered and the creep resistance can be further improved. Further, by setting the weight ratio to less than 50%, stickiness at the time of mixing can be reduced, mixing can be easily performed, and workability of mixing can be improved.

In the second embodiment, an example in which the mixed material of the silicone putty and the silicone rubber is the filling member 14 used for repairing the closure 1 has been described, but this mixed material is used for applications other than the repair of the closure 1. It can also be used. Specifically, it can be used for the following purposes.

It is a packing for sealing, and the packing is made of a mixed material of silicone putty and silicone rubber. The packing is a packing for sealing a container or a packing for piping. Further, it is a filling material to be filled in a predetermined place, and the filling material is composed of a mixed material of silicone putty and silicone rubber. The filling material is filled to prevent the gap between the cable and the insertion port of the cable, or the inflow of small animals or outside air. Further, it is a material used for vibration isolation or impact resistance of a member, and the material is composed of a mixed material of silicone putty and silicone rubber. As described above, the same effect as described above can be obtained even when the mixed material is used for the above purposes.

(Third Embodiment)
Next, the repair structure of the closure 1 according to the third embodiment will be described. The repair structure according to the third embodiment is different from the first embodiment in that it is provided with a cuttable slider 52 and a washer 53 instead of the slider 12 and the washer 13. As shown in FIGS. 15, 16 (a), 16 (b) and 17, the slider 52 includes a pair of semi-cylindrical side wall members 52a, and the two side wall members 52a are joined to each other. As a result, it is formed into a cylindrical shape. On the other hand, the washer 53 is also composed of two semi-cylindrical side wall members 53a.

A plurality of protrusions 54 protruding inward in the radial direction are formed on the arcuate inner peripheral surface 52b of the slider 52, and each protrusion 54 is in the axial direction of the slider 52 (extending direction of the cable C). ) Extends linearly. For example, the plurality of protrusions 54 are arranged at equal intervals in the circumferential direction of the slider 52, and in the present embodiment, the five protrusions 54 are arranged at equal intervals in the circumferential direction. Each protrusion 54 is provided with a corrugated portion in which irregularities are arranged in the radial direction, and one end of each protrusion 54 in the axial direction has a stepped portion 54c having a stepped height different in the radial direction at the position of the corrugated portion. Correspondingly provided.

As described above, each protrusion 54 is provided with a step portion 54c corresponding to the corrugated portion at one end in the axial direction thereof, and the protrusion 54 is axially aligned from the step portion 54c along the concave portion of the corrugated portion. It is said that it can be cut in the direction. The concave portion of the corrugated portion corresponds to a fragile portion for cutting, that is, a cut portion of the protrusion 54, and this cut portion extends in the extending direction of the cable C. By cutting the corrugated portion in the axial direction, the height of the protruding portion 54 with respect to the inner peripheral surface 52b can be changed in a plurality of steps. For example, in the present embodiment, since each protrusion 54 has four recesses, the height of the protrusion 54 can be changed in five steps.

Further, the stepped portion 54c of each protruding portion 54 is a contact portion where the washer 53 abuts in the axial direction. The step portion 54c is arranged so as to be recessed in the axial direction toward the outer side in the radial direction. That is, the step portion 54c of the protrusion 54 with which the washer 53 abuts is formed to be deeply recessed toward the outer side in the radial direction, and the step portion 54c located on the outer side in the radial direction is a step portion located on the inner side in the radial direction. It is deeper in the axial direction than 54c.

As shown in FIG. 18, the washer 53 includes a plurality of covering members 55 that are detachably stacked on top of each other in the radial direction. Each covering member 55 is formed in a semi-cylindrical shape of a thin plate in an initial state. Each covering member 55 has a plurality of cutting lines 55a extending in the axial direction, and can be cut in the circumferential direction along the cutting lines 55a.

Further, each covering member 55 includes at least one of a latch portion 55b protruding outward in the radial direction and an engagement hole 55c into which the latch portion 55b is hooked. Specifically, the covering member 55 located on the innermost side in the radial direction has only the latch portion 55b, the covering member 55 located on the outermost side in the radial direction has only the engaging hole 55c, and the other covering member 55 has a latch. Both the portion 55b and the engagement hole 55c are provided. The latch portion 55b and the engagement hole 55c are provided in the central portion of each covering member 55 in the circumferential direction.

In the plurality of covering members 55, the positions of the latch portion 55b and the engagement hole 55c are arranged so as to be offset from each other. Specifically, the covering member 55 located on the innermost side in the radial direction is provided with a latch portion 55b in the center in the axial direction, and the covering member 55 located on the innermost side in the radial direction is latched on one side in the axial direction. The portion 55b is provided, and the engagement hole 55c is provided at the center in the axial direction. The third covering member 55 located inward in the radial direction is provided with a latch portion 55b on the other side in the axial direction, and is provided with an engagement hole 55c on one side in the axial direction and in the center in the axial direction. The covering member 55 located on the inner side in the radial direction is provided with a latch portion 55b at the center in the axial direction, and is provided with an engagement hole 55c on one side in the axial direction and the other side in the axial direction. The covering member 55 located on the outermost side in the radial direction is provided with an engaging hole 55c at the center in the axial direction and on the other side in the axial direction.

As shown in FIG. 19, the latch portion 55b includes two projecting portions 55d protruding outward in the radial direction, and the two projecting portions 55d are arranged side by side in the circumferential direction. A convex portion 55e projecting outward in the circumferential direction is provided at the tip of each protruding portion 55d. On the other hand, in the engaging hole 55c, a pair of tapered portions 55f having tapered surfaces protruding inward in the circumferential direction toward the outer side in the radial direction are formed in the circumferential direction, and each tapered portion 55f is formed by each convex portion 55e. A plurality of covering members 55 are overlapped and connected in the radial direction by getting over the outer side in the radial direction and reaching the outer side in the radial direction of each tapered portion 55f.

As shown in FIG. 20, the washer 53 is pressed against the slider 52 by contacting each covering member 55 with the stepped portion 54c of each protrusion 54 of the slider 52. At this time, since each covering member 55 has a thin plate shape, each covering member 55 is in a state of being bent so as to be inclined outward in the radial direction at the step portion 54c. As a result, each covering member 55 can be more reliably inserted into the step portion 54c.

Next, a method of repairing the closure according to the third embodiment will be described. For example, as shown in FIGS. 21A and 21B, when the washer 53 and the slider 52 are used for the cable C having a substantially circular cross section, the washer 53 is connected to the cable as in the first embodiment. It is arranged around C to surround the cable C, and two side wall members 52a are joined from the side of the cable C to form an annular slider 52. At this time, the slider 52 is arranged at an adjacent position in the axial direction of the washer 53, and as described above, each covering member 55 of the washer 53 is brought into contact with each step portion 54c of the slider 52 in the axial direction.

On the other hand, for example, when the washer 53 and the washer 52 are used for the elliptical cable C, as shown in FIGS. 22 (a) and 22 (b), the washer 52 and the washer 53 are covered before being arranged. The number of members 55 is adjusted, and the washer 53 and the slider 52 are cut. In cutting the washer 53 and the slider 52, the protrusion 54 (corrugated portion) of the slider 52 is cut, and the covering member 55 of the washer 53 is cut along the cutting line 55a. These cuttings are performed using a tool such as nippers as necessary.

Specifically, for a portion having a long radial length of the cable C, such as a portion corresponding to the long axis of the ellipse of the cable C, the number of covering members 55 is reduced and the protrusion portion is formed. Cut 54 more. On the other hand, for a portion having a short radial length of the cable C, such as a portion corresponding to the elliptical short axis of the cable C, the number of covering members 55 is increased and the protrusion 54 is reduced. Cut (or do not cut). After adjusting the number of the covering members 55 of the washer 53 and cutting the washer 53 and the slider 52 in this way, the washer 53 and the slider 52 are arranged in the same manner as described above.

As described above, the repair structure according to the third embodiment includes a washer 53 that pushes the filling member 14 in a state of being attached to the outer periphery of the cable C, and a slider 52 that slides along the cable C to pressurize the washer 53. It is provided as a pressurizing member. The washer 53 has a plurality of cutting lines 55a extending in the extending direction of the cable C. As described above, since the washer 53 has a plurality of cutting lines 55a, it can be appropriately cut and used. Therefore, since the shape and size of the washer 53 can be changed according to the type of the cable C passed through the inside of the washer 53, various cables C can be reliably repaired.

Further, the washer 53 includes a plurality of covering members 55 that are detachably overlapped with each other in the radial direction of the cable C. Therefore, the thickness of the washer 53 in the radial direction can be changed by changing the number of covering members 55 stacked in the radial direction according to the size, shape and eccentricity of the diameter of the cable C. It is possible to carry out more reliable repairs.

Further, each covering member 55 includes at least one of a latch portion 55b on which the other covering member 55 is overlapped and an engaging hole 55c in which the latch portion 55b is hooked, and the latch portion 55b of each covering member 55 is provided. Are located at positions offset from each other. Therefore, even if a plurality of covering members 55 are stacked, the latch portions 55b do not interfere with each other, so that the covering members 55 can be smoothly superposed.

Further, each latch portion 55b projects outward in the radial direction. Therefore, since the latch portion 55b does not interfere with the cable C located inside the covering member 55 in the radial direction, the washer 53 can be smoothly and surely attached to the cable C.

Further, in the slider 52, the protrusion 54 has a corrugated shape in which irregularities are arranged in the radial direction, and the protrusion 54 has a plurality of cutting lines (concave portions having a corrugated shape) extending in the extending direction of the cable C. Has. Therefore, the protrusion 54 can be easily cut at the concave portion of this corrugated shape. That is, since the degree of protrusion of the protrusion 54 can be reliably changed according to the type of cable C (shape, size and degree of eccentricity of cable C), more reliable repair of various cables C becomes possible. ..

Further, the stepped portion 54c, which is the abutting portion with which the washer 53 in the protruding portion 54 abuts, is formed to be deeply recessed toward the outer side in the radial direction. Therefore, since each covering member 55 of the washer 53 can be deeply inserted toward the outer side in the radial direction, the washer 53 can be more reliably engaged with the slider 52.

(Fourth Embodiment)
Next, a method of repairing the closure 1 according to the fourth embodiment will be described. In the present embodiment, as shown in FIG. 23, in the hole portion 4a of the end face plate 4, the convex portion 4c protruding inward of the hole portion 4a is cut to repair the closure 1. The convex portion 4c is a portion protruding inward in the radial direction at one end in the axial direction of the end face plate 4, and by cutting the convex portion 4c, the leaking portion L1 is more smoothly and reliably filled with the filling member 14. It becomes possible.

First, the cutting jig 60 used for cutting the convex portion 4c will be described with reference to FIGS. 24 and 25. The cutting jig 60 includes a fixing portion 61 fixed to the end face plate 4 and a cutting portion 62 attached to the fixing portion 61. The cutting portion 62 is formed in an annular shape by joining a pair of semicircular annular half-split members 62a with bolts B1 and nuts. Each half member 62a has a male screw portion 62b protruding in the axial direction, a cutting blade 62c detachably arranged on the inner peripheral surface of the male screw portion 62b, and a radial direction on the inner peripheral surface of the male screw portion 62b. It is provided with a recess 62d that is recessed to the outside and a hole 62e provided on the outer peripheral surface of the cutting portion 62.

The male screw portion 62b is a portion for screwing the cutting portion 62 into the fixing portion 61, and extends spirally in the circumferential direction of the cutting portion 62. The cutting blade 62c is a portion for cutting the convex portion 4c, and two cutting blades 62c are provided on each half member 62a. The cutting blade 62c enters the recess 62g formed on the inner peripheral surface of the male screw portion 62b, and the screw is inserted into the insertion hole 62h of the cutting blade 62c and the screw hole formed in the recess 62g to screw the screw. By doing so, it is attached to the inner peripheral surface of the male screw portion 62b. The concave portion 62d is provided for passing shavings generated by cutting the convex portion 4c by the cutting blade 62c, and extends from one end to the other end in the axial direction of the cutting portion 62.

The fixing portion 61 is formed in an annular shape by joining a pair of semicircular annular half-split members 61a with bolts B2 and nuts. Each half member 61a includes a female threaded portion 61b formed on its inner peripheral surface, a pair of protruding pieces 61c protruding in the axial direction, and protruding portions 61f protruding radially outward from both ends in the circumferential direction. There is. The female screw portion 61b is provided for screwing the male screw portion 62b of the cutting portion 62. Further, a substantially rectangular notch 61g is provided on the outer peripheral portion of the half-split member 61a, and the handle H (see FIG. 28) used when screwing the cutting portion 62 can be hooked on the notch 61g. it can. The handle H is, for example, a hook spanner.

Two projecting pieces 61c are provided in each half member 61a, and the two projecting pieces 61c are arranged side by side in the circumferential direction of the fixing portion 61. Each protruding piece 61c has a plurality of convex portions 61d protruding inward in the radial direction. The convex portion 61d is inserted into each of the plurality of hole portions 4f formed on the outer peripheral surface 4e of the columnar portion forming the hole portion 4a of the end face plate 4. By inserting the plurality of convex portions 61d into each hole portion 4f in this way, the fixing portion 61 is fixed to the end face plate 4.

Next, a method of repairing the closure 1 according to the fourth embodiment will be described. First, the cutting jig 60 is installed on the end face plate 4. Specifically, as shown in FIG. 26A, the convex portion 61d of each half-split member 61a of the fixing portion 61 is inserted into the hole portion 4f to join the two half-split members 61a to the end. The fixing portion 61 is fixed to the face plate 4. Then, as shown in FIGS. 26 (b) and 27 (a), the cable C is joined by joining the two half-split members 62a with the cutting blade 62c of the cutting portion 62 facing the fixed portion 61 side. The cutting portion 62 is fixed to.

As shown in FIGS. 27B and 28, after the cutting portion 62 is fixed to the cable C, the male screw portion 62b of the cutting portion 62 is screwed into the female screw portion 61b of the fixing portion 61. Specifically, the protruding portion H1 of the handle H is hooked on the protruding portion 61f or the notch 61g of the fixed portion 61 to hold the grip portion H2 of the handle H with one hand, and the rod-shaped member X is inserted into the hole portion 62e of the cutting portion 62. Is inserted and the rod-shaped member X is rotated by the other hand, so that the cutting portion 62 is screwed into the fixing portion 61.

When the cutting portion 62 is screwed in this way, each cutting blade 62c of the cutting portion 62 is inserted into the convex portion 4c of the end face plate 4 from the outside in the axial direction, and in this state, the cutting blade 62c spirals with respect to the end face plate 4. By rotating to, as shown in FIG. 29, the convex portion 4c is in a cut state (step of cutting the convex portion). After that, as in each of the above-described embodiments, the filling member 14 is filled in the leak portion L1, the filling member 14 is pressurized by installing a washer and a slider (pressurizing member), and the pressing member is charged by the spring member. A series of steps are completed through pressing.

As described above, in the method of repairing the closure 1 according to the fourth embodiment, the convex portion 4c protruding inward of the hole portion 4a is cut by the cutting jig 60, and then the filling member 14 is arranged in the hole portion 4a. By arranging the filling member 14 after cutting the convex portion 4c with the cutting jig 60 in this way, the convex portion 4c that may hinder the arrangement of the filling member 14 can be removed, so that the filling member 14 can be easily arranged. It can be carried out. Further, since the filling member 14 can be reliably arranged in the portion where the convex portion 4c is originally provided, the gas leak can be repaired more reliably.

Further, in the step of cutting the convex portion 4c, the convex portion 4c is cut by attaching the cutting portion 62 to the fixed portion 61 and screwing the cutting portion 62 into the fixed portion 61. Since the convex portion 4c is cut by screwing the cutting portion 62 in this way, the convex portion 4c can be smoothly cut by rotating the cutting portion 62.

Further, a concave portion 62d recessed outward in the radial direction is formed on the inner peripheral surface of the cutting portion 62, and when cutting the convex portion 4c, the shavings of the convex portion 4c are passed through the concave portion 62d. Therefore, it is possible to avoid the situation where shavings are accumulated inside the hole 4a and the like, and the shavings can be discharged smoothly, so that the convex portion 4c can be cut more efficiently.

Further, in the present embodiment, the handle H is attached to the fixed portion 61 and the rod-shaped member X is attached to the cutting portion 62, and the convex portion 4c is cut by the rotation of the rod-shaped member X with respect to the handle H. Therefore, since the cutting portion 62 can be easily screwed in by hand, the convex portion 4c can be cut more efficiently.

(Fifth Embodiment)
Next, the repair structure of the closure according to the fifth embodiment will be described. As shown in FIGS. 31, 32 and 33, the repair structure 80 according to the fifth embodiment has a fixing member 81 fixed to the end face plate 4 and a positioning arm attached to the outside of the fixing member 81 in the axial direction. 82, a push-in bolt 83 inserted into the positioning arm 82 in the axial direction, a filling member 84, a holding member 85 for holding the filling member 84, and a spring member 86 for pressing the holding member 85 toward the filling member 84. It has.

The fixing member 81 includes a hook plate 81a fixed to the end face plate 4 and a ring member 81b to which the hook plate 81a is fixed. The hook plate 81a has a convex portion to be inserted into the hole portion 4f (see FIG. 23) of the end face plate 4, and the hook plate 81a is fixed to the end face plate 4 by inserting the convex portion into the hole portion 4f. To.

The ring member 81b includes a semicircular ring member 81c, and the ring member 81b is formed by joining two semicircular members 81c from the side of the cable C. The ring member 81b includes a screw hole 81d for screwing a screw 87 for fixing the positioning arm 82, and a plurality of screw holes 81d are arranged side by side in the circumferential direction of the ring member 81b. These screw holes 81d are exposed to the outside in the axial direction, and screws 87 are screwed into each screw hole 81d from the outside in the axial direction.

The positioning arm 82 has a shape extending in a straight line. One end and the other end of the positioning arm 82 in the longitudinal direction are fixed to the ring member 81b, and the positioning arm 82 is fixed to the outside of the ring member 81b in the axial direction while straddling the annular ring member 81b. The positioning arm 82 has a first insertion hole 82a provided in the center in the longitudinal direction and a pair of second insertion holes 82b provided at both ends in the longitudinal direction.

The first insertion hole 82a is provided for positioning the push-in bolt 83, and the push-in bolt 83 is inserted into the first insertion hole 82a in the axial direction. The first insertion hole 82a has an elongated hole shape extending in the width direction of the positioning arm 82 (vertical direction in FIG. 31). Since the first insertion hole 82a has an elongated hole shape in this way, it is possible to insert the push-in bolt 83 while adjusting the position of the positioning arm 82 in the width direction.

The second insertion hole 82b is inserted with a screw 87 for fixing the positioning arm 82 to the fixing member 81. The second insertion hole 82b has an elongated hole shape that penetrates in the axial direction and extends in the longitudinal direction of the positioning arm 82. Since the second insertion hole 82b has an elongated hole shape extending in the longitudinal direction of the positioning arm 82 in this way, the positioning arm 82 can be flexibly fixed even to the ring members 81b having different diameters in the radial direction. It is possible.

The push-in bolt 83 is provided to push the spring member 86 from the outside in the axial direction. The push-in bolt 83 is screwed into a nut 88 arranged between the spring member 86 and the positioning arm 82. Then, by pushing the end portion 83a of the pushing bolt 83 protruding from the nut 88 toward the spring member 86 into the spring member 86, the pushing bolt 83 pressurizes the spring member 86.

As the filling member 84, for example, the same one as the filling member 14 of the first embodiment can be used, but it may be different from the filling member 14. The holding member 85 holds the filling member 84 on the opposite side of the spring member 86. The holding member 85 also functions as a pressurizing member that pressurizes the filling member 84. The holding member 85 has a recess 85a that is curved and recessed. By holding the filling member 84 in the recess 85a, the holding member 85 can stably hold the filling member 84.

The spring member 86 extends in the axial direction between the holding member 85 and the pushing bolt 83. The spring member 86 is, for example, a coil spring. The spring member 86 has a spiral shape between the first pedestal 86a provided at one end in the axial direction, the second pedestal 86b provided at the other end in the axial direction, and the first pedestal 86a and the second pedestal 86b. It includes the spring portion 86c and the spring portion 86c. The first pedestal 86a is a portion that presses the holding member 85, and the second pedestal 86b is a portion that is pushed into the push bolt 83. The first pedestal 86a of the spring member 86 presses the holding member 85 toward the filling member 84.

Next, a repair method for forming the repair structure 80 and repairing the leaked portion of the closure will be described. In the initial state, as shown in FIG. 34, the airtight tape T1 is wound between the hole 4a of the end face plate 4 and the cable C, and the leaking portion L1 is formed between the wound airtight tape T1. Suppose there is.

First, the fixing member 81 is fixed to the outside of the end face plate 4 in the axial direction. Specifically, the hook plate 81a is attached to the half-split member 81c and the two half-split members 81c are joined to form the ring member 81b, and the ring member 81b is fixed to the end face plate 4. Further, as shown in FIG. 35 (a), the holding member 85 is attached to the spring member 86 to hold the filling member 84 by the holding member 85, and the pushing bolt is inserted into the first insertion hole 82a and the nut 88 of the positioning arm 82. Insert 83. The filling member 84 may be attached (held) to the holding member 85 at the time of assembly at the repair site, or may be performed in advance at a factory or the like.

As shown in FIGS. 35 (a) and 35 (b), the filling member 84 is opposed to the leaking portion L1 in the axial direction, and the filling member 84 is pressed against the leaking portion L1. Then, a screw 87 is inserted into each of the second insertion holes 82b of the positioning arm 82, and each screw 87 is screwed into the screw hole 81d to fix the positioning arm 82 to the fixing member 81. At this time, since a plurality of screw holes 81d are arranged side by side in the circumferential direction and the second insertion hole 82b of the positioning arm 82 has an elongated hole shape, any screw can be used depending on the location of the leakage portion L1. It is possible to select the hole 81d and freely arrange the positioning arm 82 with respect to the fixing member 81.

Further, the position of the push-in bolt 83 passed through the first insertion hole 82a is adjusted, and the push-in bolt 83 is aligned so that the leakage portion L1 and the push-in bolt 83 are aligned along the axial direction. Then, the pushing bolt 83 is rotated and tightened to the nut 88, and the end portion 83a of the pushing bolt 83 is pushed into the spring member 86. As a result, the pushing force is transmitted to the filling member 84 via the spring member 86 and the holding member 85, and the filling member 84 is pressed against the leakage portion L1. After adjusting the pressing force as described above, the repair of the leaked portion L1 is completed.

As described above, according to the repair structure 80 of the fifth embodiment, the same effect as that of the first embodiment can be obtained, and the leaked portion L1 can be locally (partially) repaired. Therefore, the repair work of the gas leak from the leak portion L1 can be easily and surely performed. Further, the repair structure 80 includes a spring member 86 that presses the holding member 85 toward the filling member 84. Therefore, even if the filling member 84 expands or contracts, the spring member 86 expands and contracts to absorb the expansion or contraction of the filling member 84, so that a stable pressing force can be maintained for a long period of time. Therefore, since the pressing force can be stabilized for a long period of time, the life of the repair structure 80 can be extended, and gas leakage that may occur in the future can be prevented.

In the fifth embodiment, an example in which one end and the other end of the positioning arm 82 in the longitudinal direction are fixed to the ring member 81b has been described. However, the present invention is not limited to this example, and only one end (one side) of the positioning arm 82 may be fixed to the ring member 81b. As described above, the number and arrangement modes of the fixing portions of the positioning arm 82 with respect to the ring member 81b can be appropriately changed.

The present invention has been described in detail above based on the embodiment. However, the present invention is not limited to the above embodiment. The present invention can be modified in various ways without departing from the gist thereof. For example, in the above-described embodiment, the example in which the cutting jig 60 includes a fixing portion 61 fixed to the end face plate 4 has been described, but instead of the fixing portion 61, a fixing portion fixed to the sleeve 2 is provided. You may.

Further, in the above-described third embodiment, an example in which the concave portion of the corrugated portion in the protrusion 54 of the slider 52 corresponds to the cut portion of the protrusion 54 has been described, but the shape of the cut portion is limited to the above example. Not done. Further, the shape of the protrusion 54 is not limited to the above-described embodiment and can be changed as appropriate, and the protrusion 54 may be a protrusion having no corrugated portion. Further, the washer 53 is not limited to the mode in which the covering member 55 is provided, and can be appropriately changed.

Further, in the above-described embodiment, an example in which the repair structure 10 includes a spring member 15 which is a compression coil spring has been described, but the type of the spring member is not limited to the compression coil spring. For example, as shown in FIG. 30, the repair structure 70 may include a spring member 75 which is a tension coil spring. In the repair structure 70, the spring member 75 extends in the extending direction of the cable C between the convex portion 71d provided on the outer peripheral surface 71c of the ring member 71b and the convex portion 72b provided on the outer peripheral surface 72a of the slider 72. The spring member 75 urges the slider 72 toward the closure 1, and the slider 72 pressurizes the filling member 14 via the washer, thereby exhibiting the same effect as the repair structure 10. ..

Further, in the above-described embodiment, an example in which the leak portion L1 is located between the cable C and the hole portion 4a of the end face plate 4 has been described, but the position of the leak portion is not limited to this example. As described above, the leak portion may be between the end face plate and the sleeve, or between each component constituting the end face plate. That is, for example, in the above-described embodiment, the repair structure 10 is configured to cover only the hole 4a of the end face plate 4, but is configured to cover the entire end face plate 4 by attaching a fixing member to the sleeve 2. It may be.

1 ... Closure, 2 ... Sleeve, 2a ... Rib, 3 ... Screw, 4 ... End face plate, 4a ... Hole, 4b ... Side wall member, 4c ... Convex, 4e ... Outer surface, 4f ... Hole, 5 ... Band member 10,80 ... Repair structure, 11,81 ... Fixing member, 11a, 81a ... Hook plate, 11b, 81b ... Ring member, 11c ... Side wall member, 11d, 81d ... Screw hole, 12,52 ... Slider (pressurization) Member, slide member), 12a ... side wall member, 12c ... hole, 12d ... outer peripheral surface, 13,53 ... washer (pressurizing member, pushing member), 14,84 ... filling member, 15,86 ... spring member, 15a ... screw rod, 15b ... spring, 15c ... washer, 15d ... nut, 20, 20A, 20B ... structure, 21 ... accommodating member, 21a ... main surface, 21b ... groove, 21d ... screw hole, 22 ... pressing member, 22a ... Main body, 22b ... Main surface, 22c ... Protruding part, 22d ... Insertion hole, 23 ... Screw rod, 24 ... Sensor, 25 ... Washer (pushing member), 26 ... Spring, 27 ... Washer, 52a ... Side wall member, 52b ... Inner peripheral surface, 53a ... Side wall member, 54 ... Projection, 54c ... Step, 55 ... Covering member, 55a ... Cutting line, 55b ... Latch, 55c ... Engagement hole, 55d ... Projection, 55e ... Convex , 55f ... Tapered part, 60 ... Cutting jig, 61 ... Fixed part, 61a ... Half member, 61b ... Female threaded part, 61c ... Protruding piece, 61d ... Convex part, 61f ... Protruding part, 62 ... Cutting part, 62a ... Half-split member, 62b ... Male screw part, 62c ... Cutting blade, 62d ... Recessed, 62e ... Hole, 62g ... Recessed, 62h ... Insertion hole, 81c ... Half-split member, 82 ... Positioning arm, 82a ... First insertion Hole, 82b ... 2nd insertion hole, 83 ... Push-in bolt, 83a ... End, 85 ... Holding member, 86a ... 1st pedestal, 86b ... 2nd pedestal, 87 ... Screw, 88 ... Nut, B1, B2 ... Bolt, C ... cable, H ... handle, H1 ... protruding part, H2 ... gripping part, L1 ... leaking part, T1 ... airtight tape, X ... rod-shaped member.

Claims (17)

A tubular sleeve accommodating a connection portion to which at least two cables are connected, and an end face plate having a hole for passing the cable and sealing the sleeve with the cable passed through the hole. It is a repair structure of the closure provided
A filling member arranged to face the closure end face having a leak portion, and
A pressurizing member that pressurizes the filling member from the outside of the end face plate,
A spring member that presses the pressurizing member toward the filling member, and
Equipped with a,
The filling member is a mixed material of silicone putty and silicone rubber.
Closure repair structure. A plurality of the spring members are arranged point-symmetrically or line-symmetrically with respect to the cable.
The closure repair structure according to claim 1. The rubber hardness of the silicone rubber is lower than the rubber hardness of the silicone putty.
The closure repair structure according to claim 2 . The weight ratio of the silicone rubber to the entire mixed material is 30% or more and less than 50%.
The closure repair structure according to any one of claims 1 to 3 . The pressurizing member includes a pushing member that pushes the filling member in a state of being attached to the outer periphery of the cable, and a slide member that slides along the cable to pressurize the pushing member.
The pushing member has a plurality of cutting lines extending in the extending direction of the cable.
The closure repair structure according to any one of claims 1 to 4 . The indentation member comprises a plurality of covering members that are detachably stacked on top of each other in the radial direction of the cable.
The closure repair structure according to claim 5 . Each of the covering members includes at least one of a latch portion for overlapping and hooking the other covering members, and an engaging hole for hooking the latch portion.
The closure repair structure according to claim 6 . The latch portions of the covering members are arranged at positions offset from each other.
The closure repair structure according to claim 7 . Each of the latch portions protrudes outward in the radial direction.
The closure repair structure according to claim 7 or 8 . A protrusion that comes into contact with the pushing member is formed on the inner peripheral surface of the sliding member.
The closure repair structure according to any one of claims 6 to 9 . The protrusion has a corrugated shape in which irregularities are arranged in the radial direction.
The closure repair structure according to claim 10 . The protrusion has a plurality of cutting lines extending in the extending direction of the cable.
The closure repair structure according to claim 10 or 11 . The portion of the protrusion that the pushing member abuts is shaped to be deeply recessed toward the outer side in the radial direction.
The closure repair structure according to any one of claims 10 to 12 . A tubular sleeve accommodating a connection portion to which at least two cables are connected, and an end face plate having a hole for passing the cable and sealing the sleeve with the cable passed through the hole. It ’s a method of repairing the closure
The process of arranging the filling member in the hole and
The process of arranging the pressurizing member and
A step of arranging a spring member and pressing the pressurizing member toward the filling member by the spring member.
Equipped with a,
Prior to the step of arranging the filling member, a step of cutting the convex portion protruding inside the hole portion with a cutting jig is further provided.
Closure repair method. The cutting jig includes a fixing portion fixed to at least one of the end face plate and the sleeve, and a cutting portion attached to the fixing portion.
In the cutting step, the convex portion is cut by attaching the cutting portion to the fixed portion and screwing the cutting portion.
The method for repairing a closure according to claim 14 . The inner peripheral surface of the cutting portion is formed with a recess that is recessed outward in the radial direction.
In the cutting step, the shavings of the convex portion are passed through the concave portion.
The closure repair method according to claim 15 . Prior to the step of arranging the filling member, a step of mixing powdered silicone rubber with the silicone putty to produce the filling member is further provided.
The method for repairing a closure according to any one of claims 14 to 16 .