JP6771974B2 - Closure repair member, heating member, sealing member, and closure repair method. - Google Patents

Description

The present invention relates to a closure repair member, a heating member, a sealing member, 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 the 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 after all. In this case, it is necessary to identify the location of the gas leak and make further repairs. In this way, the repair work for gas leaks may be inadequate.

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

The closure repair member 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 member for repairing a closure having an end face plate that seals the sleeve with a seal, and a sealing member that is applied to a leak portion formed between the cable and the end face plate to seal the leak portion. The sealing member includes a heating member for heating the stop member, and the sealing member is a member that is deformed and hardened by being heated by the heating member and pressed by the heating member.

According to such a form, the sealing member seals the leaked portion, the heating member heats the sealing member, and the sealing member is pressed from the outside of the end face plate. Therefore, by sealing the leaked portion with the sealing member and pressing the sealing member while heating it with the heating member, the sealing member is deformed to surely close the leaked portion and harden. By deforming and hardening the sealing member by heating in this way, it is possible to easily and surely repair the gas leak leaking from the leaking portion.

In the repair member according to another form, a recess may be formed in a portion of the heating member that comes into contact with the sealing member.

In the repair member according to another form, a mold release means for suppressing the adhesion of the heating member to the sealing member may be provided.

In the repair member according to another form, the mold release means may be a sheet member bonded to the sealing member.

In the repair member according to another form, the sealing member may be uncrosslinked EPDM rubber before being heated by the heating member.

The heating member 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 sleeve having a hole for passing the cable and passing the cable through the hole. A heating member used for repairing closures provided with an end face plate to be sealed, and a sealing member for sealing a leak portion formed between a cable and an end face plate is pressed from the outside of the end face plate and sealed. Heat the stop member.

In such a form of the heating member, the sealing member is formed by heating the sealing member that seals the leaked portion formed between the cable and the end face plate and pressing the sealing member from the outside of the end face plate. While deforming, it surely closes the leaked part and hardens. Therefore, by pressing the sealing member while heating it with the heating member, the leaked portion can be easily and surely closed.

The sealing member 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 sleeve having a hole for passing the cable and passing the cable through the hole. It is a sealing member used for repairing a closure provided with an end face plate for sealing, and is arranged in a leakage portion formed between a cable and an end face plate, and is pressed from the outside of the end face plate by a heating member. By being heated together, it deforms and hardens.

The sealing member of such a form is deformed to close the leaked portion and harden by being pressed by the heating member in a state where the leaked portion formed between the cable and the end face plate is sealed. In this way, since the sealing member is deformed and hardened in a state where the leaked portion is sealed, the leaked portion can be reliably closed. Therefore, reliable and easy repair of the leaked portion can be realized.

In the sealing member according to another form, a mold release means for suppressing adhesion of the heating member may be provided.

In the repair method according to one embodiment of the present invention, a tubular sleeve accommodating a connection portion to which at least two cables are connected and a sleeve having a hole for passing the cable and passing the cable through the hole. It is a method of repairing a closure provided with an end face plate to be sealed, in which a step of arranging a sealing member in a leak portion formed between a cable and an end face plate and while heating the sealing member by a heating member. A step of deforming and hardening the sealing member by pressing the sealing member toward the leaking portion is provided.

According to such a form, a sealing member is arranged in the leaking portion formed between the cable and the end face plate to seal the leaking portion, and the sealing member is pressed toward the leaking portion by the heating member. Then, by sealing the leaked portion with the sealing member and heating the sealing member with the heating member to press the sealing member, the sealing member surely closes and cures the leaking portion while being deformed. Therefore, the repair work of the gas leak leaking from the leaked portion can be easily and surely performed.

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

It is a perspective view which shows an example of the closure which is the object of repair of the repair member which concerns on embodiment. It is a front view which shows the state after repair of the closure of FIG. (A) is a perspective view which shows the sealing member. (B) is a perspective view showing a seat member which is a mold release means. (A) is a side view showing a heating member. (B) is a cross-sectional view taken along the line AA of FIG. 4 (a). (A) is a front view which shows an example of the leakage part of a closure. (B) is a front view showing a state in which the leaked portion of FIG. 5 (a) is sealed with a sealing member. It is a perspective view which shows the state which put the sheet member on the sealing member of FIG. 5B. It is a perspective view which shows the state which pressed the heating member against the sheet member of FIG. It is sectional drawing which shows the state which pressed the heating member against the sheet member of FIG. It is sectional drawing which shows the sealing member which concerns on the modification.

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 is omitted.

Hereinafter, the repair member, the heating member, and the sealing member according to the present embodiment will be described. The term "repair" in the present specification includes eliminating gas leakage from the closure, reducing the leakage to the extent that there is no problem in use, and preventing gas leakage from the closure in advance. It also includes measures against gas leaks from closures. Various types of closures can be mentioned. Specifically, as shown in FIGS. 1 and 2, 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, for example. To do.

First, the structure of closure 1 will be described. The closure 1 includes two semi-cylindrical sleeves 2, and the two sleeves 2 are fixed to each other with screws 3. The closure 1 has a cylindrical shape as a whole, and the sleeve 2 constitutes a side surface of the closure 1. 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 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 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 has, for example, a putty shape, and examples of the material of the sealing tape include butyl rubber.

An airtight tape T that closes the gap between the hole 4a of the end face plate 4 and the cable C is wound around the cable C. The airtight tape T is made of rubber. For example, the material of the airtight tape T is EPDM (ethylene propylene diene rubber). The airtight tape T may be composed of peroxide crosslinked EPDM. A plurality of layers of the airtight tape T are wound around the outer circumference of the cable C. Then, the outer peripheral surface of the airtight tape T located on the outermost side in the radial direction is brought into close contact with the inner peripheral surface of the hole 4a, so that the space between the cable C and the end face plate 4 is sealed.

The end face plate 4 of FIG. 2 is provided with only one hole 4a, but the shape and number of the end face plate and the holes are appropriately changed according to the number of cables C extending from the closure 1 or the type of the cable C. It is possible. There are various types of end face plates. Specifically, for example, the cable C may be bifurcated or trifurcated from the cable connection portion, 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. The plurality of band members 5 are provided for tightening the sleeve 2 having a high atmospheric pressure inside with screws 3 from the outside, and are made of, for example, stainless steel.

In the closure 1 configured as described above, gas leaks from the leak portion L (see FIG. 5) located between the cable C and the hole portion 4a (the place where the airtight tape T is provided) due to aged deterioration or the like. There is. The leak portion L indicates a portion where the gas sealed in the sleeve 2 can leak, such as between the cable C and the hole portion 4a.

For example, the leak portion L is formed between a part of the airtight tape T and another portion (interface) adjacent to the portion in the radial direction. When a gas leak from the leaked portion L is detected, it is necessary to perform repair work to close the leaked portion L and eliminate the gas leak. Examples of the method for identifying the leaked portion L include a method of adhering a liquid such as soapy water to the airtight tape T and confirming whether or not it foams.

Next, the repair member 10 used in the repair work of the leaked portion L will be described. The repair member 10 includes a sealing member 11 that seals the leaked portion L. In FIG. 2, the leaked portion L is sealed by the sealing member 11, and the leaked portion L is repaired by the repair member 10. It shows the state of being done. Further, as shown in FIGS. 2, 3 and 4, the repair member 10 seals the sealing member 11 and the heating member 12 that heats the sealing member 11 and presses the sealing member 11 together. A sheet member 13 (release means) interposed between the stop member 11 and the heating member 12 is provided.

The sealing member 11 is made of a soft rubber material before heating. Before heating, the sealing member 11 is in a soft state so as to be torn by hand. The sealing member 11 is provided to seal the leaked portion L, and the shape and size of the sealing member 11 are appropriately changed according to the shape and size of the leaked portion L. For example, the sealing member 11 has a substantially rectangular parallelepiped shape, and the length, width, and thickness of the sealing member 11 are 15 mm, 15 mm, and 2.8 mm, respectively. The sealing member 11 is cured while being deformed with heating.

The material of the sealing member 11 is preferably a material that adheres to and adheres to the airtight tape T when it is cured. The sealing member 11 is integrated with the airtight tape T in a state where the leaked portion L is closed, thereby eliminating the leakage of gas from the leaked portion L. Further, the cured sealing member 11 closes the plurality of layers of airtight tape T from the outside in the axial direction. For example, the cured sealing member 11 has a circular shape.

The material of the sealing member 11 before heating is, for example, uncrosslinked EPDM rubber. The sealing member 11 before heating has, for example, adhesiveness temporarily fixed to the leaking portion L and fluidity that plastically deforms when subjected to an external force at room temperature. The sealing member 11 before heating is deformed by pressurization when it receives an external force. Then, when the sealing member 11 is heated, it is crosslinked and adhered, and in a cured state, it is integrated with the airtight tape T, so that the leaking portion L can be sealed more reliably. Further, the sealing member 11 is cured while maintaining close contact with the leaked portion L, and the fluidity and adhesiveness are lowered by the curing. The material of the sealing member 11 is not limited to EPDM and can be changed as appropriate.

The sheet member 13 has, for example, a square paper shape, but the shape and size of the sheet member 13 are appropriately changed according to the shape and size of the sealing member 11. The sheet member 13 is changed to, for example, a shape and size capable of covering the sealing member 11. The sheet member 13 is attached to the sealing member 11 by being pressed against the sealing member 11 having adhesiveness. Further, the sheet member 13 may be attached to the sealing member 11 in advance.

The sheet member 13 suppresses the adhesion of the heating member 12 to the sealing member 11. The sheet member 13 is interposed between the sealing member 11 and the heating member 12 to maintain the releasability of the heating member 12 with respect to the sealing member 11. The sheet member 13 suppresses the adhesion between the sealing member 11 and the heating member 12, and makes it possible to easily separate the heating member 12 from the sealing member 11. The sheet member 13 is, for example, a sheet made of PTFE (Poly Tetra Fluoro Ethylene). Further, the material of the sheet member 13 may be a fluorine-based material such as PTFE, a silicone-based material, or the like, and can be appropriately changed.

The heating member 12 heats while pressing the sealing member 11 via the sheet member 13. The heating temperature of the sealing member 11 by the heating member 12 is, for example, 170 ° C. or higher and 200 ° C. or lower. As shown in FIGS. 4 (a) and 4 (b), in the present embodiment, the heating member 12 has a rod shape. The heating member 12 includes a main body portion 12a extending in a rod shape and a diameter-expanded portion 12b whose diameter is increased at one end of the main body portion 12a in the longitudinal direction. The heating member 12 is made of a material capable of transferring heat to the sealing member 11, and is made of a metal such as iron, for example.

The main body 12a has, for example, a round bar shape. The heating member 12 can be connected to a general-purpose heating source H (see FIG. 8) such as an electric iron or a soldering iron, and the main body portion 12a is inserted into the tubular heating portion H1 of the heating source H. By doing so, the heating member 12 is connected to the heating source H. The heating member 12 may be connected to the heating source H by means other than inserting the main body portion 12a into the heating portion H1.

The enlarged diameter portion 12b has an outer peripheral surface 12c extending in the circumferential direction, a tapered surface 12f inclined inward in the radial direction from the axial end of the outer peripheral surface 12c, and an annular shape located at the axial end of the tapered surface 12f. It has an end face 12d and a recess 12e recessed in the axial direction inside the end face 12d in the radial direction. The diameter-expanded portion 12b is, for example, expanded at a right angle to the main body portion 12a.

The end face 12d is a portion that presses the sealing member 11 via the sheet member 13. The diameter of the tapered surface 12f is gradually reduced toward the end surface 12d. The end face 12d is located outside the leakage portion L in the axial direction via the sheet member 13 and the sealing member 11. The area of the annular portion of the end face 12d is smaller than the area of the square portion of the sealing member 11 and the area of the square portion of the sheet member 13. Further, the diameter of the end face 12d is smaller than either the length of one side of the sealing member 11 or the length of one side of the sheet member 13. The sizes of the heating member 12, the sealing member 11, and the sheet member 13 can be changed according to the size of the leaked portion L.

The recess 12e secures the thickness of the sealing member 11 that seals the leaked portion L in the axial direction. Specifically, the sealing member 11 pressed and pressed by the end face 12d is deformed by the pressure and enters the recess 12e. Since the sealing member 11 enters the recess 12e in this way, the sealing member 11 located in the recess 12e becomes thicker. The recess 12e is curved and recessed, for example, but the shape of the recess 12e can be changed as appropriate.

Next, a repair method for repairing the leaked portion L of the closure 1 using the repair member 10 will be described. In the initial state, as shown in FIG. 5A, the airtight tape T is interposed between the hole 4a of the end face plate 4 and the cable C, and the airtight tape T is between the plurality of layers of the airtight tape T. A leak portion L is formed.

First, as shown in FIG. 5B, the sealing member 11 is attached to the outside of the leaking portion L in the axial direction by utilizing the adhesiveness of the sealing member 11. Specifically, the uncrosslinked sealing member 11 is cut to a size capable of sealing the leaking portion L, and the leaking portion L is closed by the cut sealing member 11. In the example of FIG. 5B, the sealing member 11 is arranged by applying the square-shaped sealing member 11 to the outside in the axial direction of the airtight tape T (step of arranging the sealing member in the leakage portion). ). Next, as shown in FIG. 6, the sheet member 13 is placed on the sealing member 11, and the sealing member 11 is subjected to the mold release means. At this time, for example, by utilizing the adhesiveness of the sealing member 11, the square sheet member 13 is attached so as to cover the sealing member 11 from the outside in the axial direction (the sealing member 11 is provided with a mold release means). Process).

Subsequently, as shown in FIGS. 7 and 8, the heating member 12 is connected to the heating source H by inserting the main body portion 12a of the heating member 12 into the heating portion H1 of the heating source H (the heating member 12 is connected to the heating source H). Step of connecting to the heating source H). Then, the end surface 12d of the heating member 12 is pressed against the sheet member 13 by hand holding the heating source H, and heat is transferred from the heating source H to the sealing member 11 via the heating member 12 and the sheet member 13. At this time, the heating member 12 is arranged so that the leakage portion L, the sealing member 11, and the recess 12e of the heating member 12 are aligned in the axial direction (step of arranging the heating member 12).

In this way, the sealing member 11 is pressed against the leakage portion L by the heating member 12 to deform the sealing member 11, and the sealing member 11 is crosslinked by heating. The time for heating and pressing the sealing member 11 by the heating member 12 is, for example, 5 minutes. The heated and pressed sealing member 11 deforms and enters the recess 12e, cures while ensuring the thickness in the recess 12e, and adheres to the airtight tape T (the sealing member 11 is heated while heating the sealing member 11). Step of pressing toward the leaked portion L). Through the above steps, the repair of the leaked portion L of the closure 1 is completed.

Next, the operation and effect of the repair member 10, the sealing member 11, the heating member 12, and the repair method according to the present embodiment will be described.

According to the repair member 10, the sealing member 11, the heating member 12, and the repair method of the present embodiment, the sealing member 11 seals the leaked portion L, and the heating member 12 heats the sealing member 11. At the same time, the sealing member 11 is pressed from the outside of the end face plate 4. Therefore, by sealing the leaked portion L with the sealing member 11 and pressing the sealing member 11 while heating the sealing member 11 with the heating member 12 to pressurize the sealing member 11, the sealing member 11 is deformed and the leaking portion L is deformed. Firmly closes and cures and adheres. By deforming, curing and adhering the sealing member 11 by pressurization and heating in this way, it is possible to easily and surely repair the gas leak leaking from the leaked portion L. Further, since the sealing member 11 having a size suitable for the size of the leaked portion L can be applied, the leaked portion L can be locally repaired.

Further, a recess 12e is formed in a portion (end face 12d) of the heating member 12 that comes into contact with the sealing member 11 via the sheet member 13. Therefore, when the sealing member 11 is pushed by the heating member 12, the thickness of the sealing member 11 located in the recess 12e can be maintained by inserting the pushed sealing member 11 into the recess 12e. .. Therefore, by arranging the heating member 12 so that the leaking portion L, the sealing member 11 and the recess 12e are lined up in the axial direction and pushing the sealing member 11 with the end face 12d, the sealing member 11 adheres to the leaking portion L. Since the degree can be increased and the thickness of the sealing member 11 located at the sealing portion of the leaking portion L can be maintained, more reliable sealing of the leaking portion L can be realized.

Further, the repair member 10 includes a mold release means (sheet member 13) for suppressing adhesion of the heating member 12 to the sealing member 11. As described above, by providing the mold release means, the repair member 10 can easily separate the heating member 12 from the sealing member 11 after the heating member 12 is pressed against the sealing member 11 to be heated. Therefore, the repair work of the leaked portion L by the sealing member 11 and the heating member 12 can be efficiently performed.

Further, the above-mentioned mold release means is a sheet member 13 that is attached to the sealing member 11 due to the adhesiveness of the sealing member 11. By using the sheet member 13 as the mold release means in this way, the mold release means can be easily arranged by sandwiching the sheet member 13 between the sealing member 11 and the heating member 12. Therefore, the repair work can be performed more efficiently. Further, when the sheet member 13 is attached to the sealing member 11 in advance, it is possible to eliminate the need to arrange the mold release means at the time of repair work.

Further, the sealing member 11 is uncrosslinked EPDM rubber before being heated by the heating member 12. Therefore, when the sealing member 11 is arranged in the leakage portion L and the sealing member 11 is heated while being pressurized by the heating member 12, the sealing member 11 is deformed by the pressure and adheres to the airtight tape T. Then, the sealing member 11 surely closes the leaked portion L and crosslinks in that state to cure and adhere. By cross-linking, curing and adhering the sealing member 11 in this way, the gas leak repair work can be easily and surely performed.

Further, the heating member 12 can be connected to a general-purpose heating source H. Therefore, by heating and pressing the sealing member 11 using the general-purpose heating source H and the heating member 12, the general-purpose heating source H can be effectively used for repairing the leaked portion L.

Next, a test for verifying the effects of the repair member 10 (sealing member 11 and heating member 12) will be described. First, a liquid containing a surfactant was sprayed onto the repaired sealing member 11 and the airtight tape T as shown in FIG. If the leaked portion L is insufficiently repaired, spraying the above liquid will generate bubbles from the insufficiently repaired portion. However, no bubbles were observed even after the above liquid was sprayed on the repaired sealing member 11 and the airtight tape T for about 5 minutes. Therefore, in the sealing member 11 and the airtight tape T after the repair, it can be seen that the sealing member 11 is integrated with the airtight tape T and the leakage portion L is completely closed.

In addition, a heat cycle test was performed on the repaired sealing member 11 and the airtight tape T to verify whether or not the sealing member 11 can be reliably sealed even when the temperature changes. In this heat cycle test, air is sealed inside the closure 1 having the repaired sealing member 11 and the airtight tape T with a compressor to plug the closure 1, and the initial temperature and internal pressure of the closure 1 are set to 23 ° C., respectively. , 100 kPa.

Then, the closure 1 is installed in a heat cycle oven, and 20 ° C. (0.5 hours), 20 ° C.⇒60 ° C. (1.0 hours), 60 ° C. (1.0 hours), 60 ° C.⇒20 ° C. (1. 0 hours), 20 ° C (1.0 hours), 20 ° C ⇒ -20 ° C (1.5 hours), -20 ° C (1.0 hours), -20 ° C ⇒ 20 ° C (1.0 hours) 8 Multiple heat cycles with steps were performed. At this time, the internal pressure of the closure 1 rises at a high temperature and decreases at a low temperature with the expansion and contraction of air. If the maximum and minimum values of the internal pressure shown in each cycle decrease between cycles, or if the internal pressure of closure 1 decreases at the same temperature (20 ° C) after the end of the heat cycle, air will be released. It can be determined that the leaked portion L is leaking and the repair of the leaked portion L is insufficient.

As a result of carrying out the above-mentioned heat cycle test for 5 cycles, the maximum value of the internal pressure of the closure 1 in the first cycle was 126 kPa, and the minimum value was 73 kPa. The maximum and minimum values of the internal pressure of the closure 1 in the second cycle are 125 kPa and 72 kPa, respectively, and the maximum and minimum values of the internal pressure of the closure 1 in the third cycle are 125 kPa and 72 kPa, respectively, in the fourth cycle. The maximum and minimum values of the internal pressure of closure 1 were 124 kPa and 71 kPa, respectively. The maximum value of the internal pressure of the closure 1 in the fifth cycle was 124 kPa, and the minimum value was 71 kPa.

Further, in the closure 1 having the sealing member 11 and the airtight tape T after repair, the internal pressure of the closure 1 hardly changes even if the above-mentioned heat cycle is repeated a plurality of times. Therefore, it can be seen that the closure member 1 having the sealing member 11 and the airtight tape T after the repair is not affected by the change in the internal pressure due to the temperature change, and the leakage portion L is surely sealed. As a result of conducting the same test on the closure 1 having no sealing member 11, it can be determined that air was leaking from the leaked portion L because the internal pressure of the closure 1 was reduced to 0 kPa.

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, an example has been described in which the sheet member 13 is the mold release means for ensuring the releasability of the sealing member 11 and the heating member 12. However, it is also possible to use a mold release means different from the sheet member 13. For example, instead of the sheet member 13, a mold release agent may be applied to a portion of the heating member 12 that comes into contact with the sealing member 11. When this mold release agent is used as the mold release means, for example, since the mold release agent is sprayed onto the heating member 12, the mold release means can be easily applied during the repair work. Examples of the release agent include a fluorine-based release agent and a silicone-based release agent.

Further, instead of the sheet member 13, the mold release means is provided by roughening the contact portion of at least one of the sealing member 11 and the heating member 12 where the sealing member 11 and the heating member 12 come into contact with each other. May be formed. In this case, since fine irregularities are formed on the contact portion, the contact area between the sealing member 11 and the heating member 12 can be reduced to improve the releasability.

Further, instead of the sheet member 13, as shown in FIG. 9, a crosslinked layer 14 formed in advance at a portion of the sealing member 11 in contact with the heating member 12 may be used as the mold release means. The crosslinked layer 14 is formed, for example, by preliminarily crosslinking one surface of the sealing member 11. When the crosslinked layer 14 is used as the mold release means, there is an advantage that the mold release means does not have to be prepared as a separate member.

Further, in the above-described embodiment, an example in which the end surface 12d of the heating member 12 is pressed against the sheet member 13 by holding the heating source H by hand has been described. However, the means for pressing the heating member 12 against the sealing member 11 is not limited to the above example. For example, the heating member 12 is attached to the sealing member 11 by a pressurizing means fixed to the end face plate 4 by bolt-nut joining, or by a urging means for urging the heating member 12 toward the sealing member 11 by a spring force. You may hold it down. In this case, since it is not necessary to manually press the heating member 12 against the sealing member 11, the work of pressing the heating member 12 can be easily performed.

Further, in the above-described embodiment, the heating member 12 including the main body portion 12a extending in a rod shape and the diameter-expanded portion 12b has been described, but the shape, size, and material of the heating member can be appropriately changed. Further, in the above-described embodiment, the heating member 12 connected to the general-purpose heating source H has been described, but the mode of the heating member is not limited to that connected to the general-purpose heating source H. That is, a heating member that is not connected to the general-purpose heating source H may heat the sealing member 11. For example, the heating source H may be omitted and a dedicated heating member may be used.

1 ... Closure, 2 ... Sleeve, 2a ... Rib, 3 ... Screw, 4 ... End face plate, 4a ... Hole, 4b ... Side wall member, 5 ... Band member, 10 ... Repair member, 11 ... Sealing member, 12 ... Heating member, 12a ... main body, 12b ... enlarged diameter, 12c ... outer peripheral surface, 12d ... end face, 12e ... concave, 12f ... tapered surface, 13 ... sheet member (release means), 14 ... crosslinked layer (release means) ), C ... Cable, H ... Heating source, H1 ... Heating part, L ... Leakage part, T ... Airtight tape.

Claims (9)

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 member for the closure provided.
A sealing member that is applied to a leaked portion formed between the cable and the end face plate to seal the leaked portion.
A heating member for heating the sealing member is provided.
The sealing member is a member that is deformed and hardened by being heated by the heating member and pressed by the heating member.
Closure repair material. A recess is formed in a portion of the heating member that comes into contact with the sealing member.
The closure repair member according to claim 1. A mold release means for suppressing adhesion of the heating member to the sealing member is provided.
The closure repair member according to claim 1 or 2. The mold release means is a sheet member bonded to the sealing member.
The closure repair member according to claim 3. Before being heated by the heating member, the sealing member is uncrosslinked EPDM rubber.
The closure repair member according to any one of claims 1 to 4. 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 heating member used for repairing the provided closure.
A sealing member that seals the leaked portion formed between the cable and the end face plate is pressed from the outside of the end face plate, and the sealing member is heated.
Heating member. 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 sealing member used for repairing the provided closure.
It is arranged in a leakage portion formed between the cable and the end face plate, and is deformed and hardened by being pressed and heated from the outside of the end face plate by a heating member.
Sealing member. A mold release means for suppressing adhesion of the heating member is provided.
The sealing member according to claim 7. 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
A step of arranging a sealing member in a leak portion formed between the cable and the end face plate, and
A step of deforming and hardening the sealing member by pressing the sealing member toward the leaked portion while heating the sealing member with a heating member.
How to repair closures with.

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