JPH0433515A - Pin hole repair method - Google Patents

Abstract

PURPOSE:To repair the pin hole of a loading coil tool easily by assembling a mold in such condition that a loading coil tool is surrounded, and injecting foaming resin liquid from an injection port and foaming it, and forming a cove layer so as seal a loading coil tool. CONSTITUTION:Fitting boards 26 and 27 are attached to a front side plate 17 by sliding engaging ribs 24 and 25 into engaging grooves 22 and 23 in the condition that the wirings 2a and 2b extending from a loading coil tool 3 are positioned in the lower parts of the cuts 20 and 22 of a front cover 17, and the wirings 2a and 2b are fixed in close contact condition. And by sliding engaging grooves 34 and 35 into engaging ribs 13 and 14, a ceiling plate 33 is attached to side plates 9 and 10, and hard urethane of four times or below in foaming magnification is injected from holes 36 and 37. As a result, a urethane resin layer is formed outside the loading coil tool 3, whereby leakage of nitrogen gas can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for repairing pinholes that occur in a loading coiler used to connect the ends of two wires.

[Prior Art] Generally, as shown in FIG. 3, the ends of wiring buried underground are connected within man balls 1 provided at regular intervals. A box-shaped loading coil device 3 as shown in FIG. 4 is used to connect such wirings 2a and 2b.
The ends of the wirings 2a and 2b are connected to each other inside the wiring. In the loading coil device 3, wirings 2a, 2
Nitrogen gas is filled in a sealed state to prevent oxidation of the connection part b.

[Problems to be Solved by the Invention] However, pinholes may occur in the loading coiler 3 as described above, and if these are left untreated, the nitrogen gas inside the loading coiler 3 will be drawn out. Then, wires 2a and 2b
The connection part becomes oxidized. As a result, wiring 2a, 2b
A problem has arisen in which functions such as information transmission are disrupted. Furthermore, there is a problem in that replacing the loaded coil device 3 with another loaded coil device and connecting the wirings 2a and 2b thereto requires time-consuming and troublesome work.

This invention was made in view of these circumstances, and by forming a foamed resin coating layer on the outside of the loading coiler using a mold that can be assembled and disassembled, the pins of the loading coiler can be easily removed. The purpose is to provide a pinhole repair method that can repair holes.

[Means for Solving the Problem] In order to achieve the above object, the pinhole repair method of the present invention consists of a box whose inside is hermetically filled with inert gas, and which connects two wires extending from the outside. A method for repairing pinholes that occur in a loaded coil device in which the ends of the coil are connected inside the coil, the method includes forming an insertion hole that can be freely assembled and disassembled, and that allows the wiring to be inserted in a tight state in the assembled state. Assemble the mold with the injection hole A on the outside of the loaded coil device with the wiring passed through the insertion hole, and in that state, inject foaming resin liquid into the mold through the injection hole, foam it, and solidify it. After the loaded coiler is hermetically coated with the foamed resin liquid, the mold is dismantled and removed from the loaded coiler.

[Operation] In other words, the pinhole repair method of the present invention involves assembling a mold that can be assembled and dismantled freely surrounding a loaded coil device, and then injecting a foaming resin liquid into the mold from the injection hole of the mold. By injecting and foaming the foamed resin, a coating layer of foamable resin is formed around the loaded coiler, and the loaded coiler is sealed. After forming the covering layer with the foamable resin, the mold can be disassembled and removed. In the above case, since the wiring extending from the loaded coil device is inserted into the insertion hole of the mold in a tight state, the inside of the formed coating layer is completely sealed except for the injection hole.

Next, the present invention will be explained in detail based on examples.

[Embodiment] FIG. 1 shows a mold 5 that can be assembled and disassembled freely and used in an embodiment of the present invention. That is, in the figure,
Reference numeral 6 denotes a square plate-shaped bottom plate, and engagement grooves 78 are provided on both sides of the top surface along the longitudinal direction. Reference numerals 9 and 10 are side plates made of plate-like bodies of the same shape that are assembled to the bottom plate 6, and each has an engagement groove 7 of the bottom plate 6 at its lower end.
Engagement protrusions 11 and 12 that can be detachably and slidably engaged with 8.
, and engagement protrusions 13 and 14 having the same shape as the engagement protrusions 11 and 12 are protruded from the upper end. Engagement grooves 15. which extend vertically on both sides of the inner surfaces of the side plates 9.10.
16 (the engagement groove of the side plate 10 is hidden and cannot be seen). 17 is an engagement groove 15 of the side plates 9 and 10 on both end surfaces.
It is a front side plate with protruding engaging protrusions 18 and 19 that can be slidably engaged with the front plate, and cutout portions 20 and 21 each having a semicircular shape on the lower side are spaced apart from the upper end toward the lower side. are placed in parallel. 22.23 is the notch 20.2
By engaging the engagement grooves 24 and 25 protruding from both end surfaces with the engagement grooves formed vertically on both sides of the upper side of the front plate 17, the fitting plates 26 and 27 It can be attached to the notch 2021 of. - H Note: semicircular cutouts 28.29 are provided at the lower ends of the fitting plates 26.27, and when the fitting plates 26.27 are attached to the front plate 17, the cutout portions 28.29 and the notch 20 of the front side plate 17
．． A hole is formed at the lower end of 21. Reference numeral 30 designates a rear side plate having engaging protrusions 31 and 32 protruding from both end faces that can be slidably engaged with the engaging grooves 16 of the side plates 9 and 10, and 33 designating the engaging protrusions 13 and 32 of the side plate 9 on both sides of the lower surface. An engagement groove 34 that can be slidably engaged with the engagement protrusion 14 of the side plate 10
．． 35 is a ceiling board formed thereon. 36 and 37 are holes drilled in the ceiling plate 33, one of which serves as an injection hole for injecting foamed resin into the mold 5 in the assembled state, and the other serves as an injection hole for discharging the air inside the mold 5 to the outside. It becomes a discharge hole for

In this configuration, pinhole repair in the loaded coil device 3 is performed as follows. That is, first, the bottom plate 6
A stand (not shown) with thin legs is placed in the center of the
The loaded coil device 3 is placed on this table. Next, by slidingly engaging the engagement groove 7 and the engagement protrusion 11 and the engagement groove 8 and the engagement protrusion 12, the side plate 9 is attached to the bottom plate 6.
, 10, and the engagement groove 15 and the engagement protrusion 1.
By slidingly engaging the engagement protrusions 31, 32 with B, 19 and the engagement groove 16, the front side plate 17 is attached to the side plates 9, 10.
．． Assemble the rear side plate 30. Next, wires 2a and 2b extending from the loading coiler 3 are connected to the notch 20 of the front plate 17.
．． 21, the engagement grooves 22, 2
By slidingly engaging the engagement protrusions 24.25 with 3, the fitting plates 26.27 are attached to the front side plate 17, and the wirings 2a and 2b are fixed in a tight state. Then, by slidingly engaging the engaging grooves 34, 35 with the engaging protrusions 13, 14, the ceiling plate 33 is attached to the side plates 9, 10, and the state shown in FIG. ), and the foaming ratio is 4 from the hole 36 or 37.
Inject less than double the amount of hard urethane. As a result, a urethane resin layer is formed on the outside of the loaded coil device 3, and leakage of nitrogen gas can be prevented (1) and (2).

As described above, according to the present invention, pinholes occurring in the loading coiler 3 can be repaired with simple work. Moreover, the mold 5 can be easily assembled and disassembled, and can be used repeatedly.

In the above embodiment, the mold 5 is formed into a rectangular box shape, but it is not limited to this, and may be a pipe-shaped body with closed parts at both ends, or may be formed by resin molding. Anything that can create space is fine. Moreover, semi-vulcanized butyl rubber can also be used instead of the urethane resin. Since this butyl rubber has extremely low air permeability, leakage of nitrogen gas can be sufficiently prevented. Furthermore, if a gap occurs between the wirings 2a, 2b and the mold 5, a gasket or the like is used to prevent the gap from occurring.

〔Effect of the invention〕

As described above, the pinhole repair method of the present invention involves assembling a mold that can be assembled and dismantled freely surrounding a loaded coil device, and then injecting a foaming resin liquid into the mold from the injection hole of the mold. By injecting and foaming, a foamed resin coating layer is formed around the loading coiler, and the loading coiler is sealed, making it easy to repair pinholes that occur in the loading coiler. be able to.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a mold used in an embodiment of the present invention, Fig. 2 is a perspective view illustrating how to use the mold, and Fig. 3 is a longitudinal section showing the inside of a manhole in which a loading coiler is installed. The top view and FIG. 4 are perspective views of the loaded coiler. 2a, 2b...Wiring 3...Loading coil device 5...
・Mold 36.37... Hole patent applicant Tokai Rubber Industries Co., Ltd.

Claims (1)

[Claims] (1) A method for repairing pinholes that occur in a loaded coil device, which consists of a box whose inside is hermetically filled with inert gas, and in which the ends of two wires extending from the outside are connected inside the box. Then, a mold with an injection hole that can be freely assembled and disassembled and has an insertion hole through which the above-mentioned wiring can be inserted in a tight state in the assembled state is used. Assembled on the outside, in that state, foaming resin liquid is injected into the mold through the injection hole to cause foaming, the solidified foaming resin liquid covers the loading coil device in a sealed state, and then the mold is dismantled. , a pinhole repair method characterized by removing it from a loaded coiler.