JP6537240B2 - Coating tool - Google Patents

Description

  The present invention relates to a coating treatment tool.

  Conventionally, as a covering treatment tool for waterproofing and insulating a cable connection portion at a portion where cables are linearly connected and a cable connection portion at a terminal end connection of a cable end, a disassembly line formed on a wall over the entire length There is known a coating treatment tool having a tubular hollow core member and a tube member made of an elastic material such as rubber held in a state of being expanded in diameter on the outer peripheral side of the core member (for example, Patent Document 1) reference).

Japanese Patent Publication No.49-46190

  Here, in order to add a predetermined | prescribed property with respect to a coating | coated processing tool, improvement, etc., a specific material may be arrange | positioned between a tube member and a core member. In this case, it becomes difficult to satisfactorily cover the cable or the like, and if the material is forcibly disposed, the function of covering the cable or the like may be deteriorated.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a coating treatment tool capable of adding predetermined properties while maintaining the function of coating a cable or the like.

  A coating treatment tool according to an aspect of the present invention includes a pull-out tubular hollow expanding member, an elastic tubular member held in an expanded state on the outer peripheral side of the expanding holder, and the expanded holding member. And an intermediate layer held between the elastic tubular members, wherein the elastic tubular members contract due to withdrawal of the enlarged diameter holding member and the cable and / or connector is covered by the contracted elastic tubular members In the processing tool, the intermediate layer has a first layer having fluidity and a second layer formed on the further outer peripheral side of the first layer.

  According to such a configuration, since the first layer formed on the inner circumferential side has fluidity, the first layer conforms to the shape of the cable or the like when the elastic tubular member contracts. By following the cable, the cable and the like can be well covered by the first layer. In addition, since the second layer is disposed on the outer peripheral side of the first layer having fluidity, when the elastic tubular member contracts, the first layer follows the deformation of the shape of the second layer. be able to. Therefore, a material having predetermined properties can be selected as the second layer. Therefore, predetermined properties can be added while maintaining the function of covering a cable or the like.

In another form of the coating treatment tool, the intermediate layer may have a water vapor transmission rate of 20 g / m ² · 24 h or less.

  In another form of the coating treatment tool, the second layer may be formed by a sheet.

  In the coating treatment tool according to another aspect, the sheet may include a resin layer.

  In another form of the coating treatment tool, the sheet may include a metal layer.

  In the coating treatment tool according to another aspect, the second layer may be formed by a flowable member.

  In the coating treatment tool according to another aspect, the intermediate layer may further include a third layer having fluidity on the outer peripheral side of the second layer.

  In the coating treatment tool according to another aspect, the first layer peels off from the diameter expansion holding member more easily than the second layer.

  In the coating treatment tool according to another aspect, the first layer may be formed of a composite synthetic rubber material containing silicone rubber, and the second layer may be formed of a composite synthetic rubber material containing butyl rubber.

  According to the present invention, it is possible to provide a coating treatment tool capable of adding a predetermined property while maintaining the function of coating a cable or the like.

It is a fragmentary longitudinal cross-sectional view which shows the coating | coated processing tool which concerns on 1st Embodiment. It is a cross-sectional view of the coating | coated processing tool which concerns on 1st Embodiment. It is a figure showing the state where the connector was covered using the covering treatment tool concerning a 1st embodiment. It is a cross-sectional view which shows the modification of a coating | coated processing tool. It is a fragmentary longitudinal cross-sectional view which shows the coating | coated processing tool which concerns on 2nd Embodiment. It is a figure which shows the state which coat | covered the connection part of cables using the coating | coated processing tool which concerns on 2nd Embodiment. It is a fragmentary longitudinal cross-sectional view which shows the modification of a coating | coated processing tool.

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

First Embodiment
FIG.1 and FIG.2 is a figure which shows the coating | coated processing tool 1 which concerns on this embodiment. FIG. 3 is a view showing a state in which the connector side of the cable 10 is covered using the covering treatment tool 1. In FIG. 1 and FIG. 3, the figure which peeled off a part (left side of the axis line L) of the elastic tubular member 3 is shown so that the inside of the elastic tubular member 3 in the coating | coated processing tool 1 can be seen. The cable 10 shown in FIG. 3 is, for example, a communication cable in a communication device (not shown) such as a wireless device. A connector 12 is connected to the end of the insulation coated cable 10, and a connection nut 13 is provided at the end of the connector 12. In this embodiment, the connector 12 of the cable 10 and the connector 20 of the communication device are fixed by the connection nut 13. As a target to be covered by the covering tool 1, other than covering the connecting portion between the connector 20 of the communication apparatus and the connector 12 of the cable 10 shown in FIG. is assumed.

  The term "cable" in the present embodiment includes not only communication cables but also coaxial cables such as CATV cables, optical communication cables, power cables and the like. The lower side (end 3a side) in the sheet of FIG. 1 is the end side, and the upper side (opposite to the end 3a) in the sheet of FIG. 1 is the proximal side.

  Although the coating treatment tool 1 is used for both indoor use and outdoor use, this embodiment will be described as outdoor use. As shown in FIG. 1, the coating treatment tool 1 includes a core member (expanded diameter holding member) 2 formed in a tubular shape, and an elastic tubular member 3 held in a state of being expanded in diameter on the outer periphery of the core member 2. And an intermediate layer 8 held between the core member 2 and the elastic tubular member 3. The intermediate layer 8 is configured to include the first layer 5 having fluidity and the second layer 6 provided on the outer periphery of the first layer 5.

  The core member 2 is a cylindrical tubular hollow member having a breaking line formed on the wall surface along the entire length. The disassembly line is provided so as to gradually advance in the direction of the axis L while orbiting or circling and reversing around the axis L of the core member 2. In the present embodiment, as the disassembly line, the continuous spiral groove 2a provided so as to gradually advance in the direction of the axis L (the axial direction of the diameter-enhancing member) is provided while circling around the axis L It is done. Hereinafter, the “disassembly line” will be described as the continuous spiral groove 2a. As a material of the core member 2, for example, a resin such as polyethylene or polypropylene is used. The core member 2 can be pulled out as a core ribbon 2b which is a cord-like body along the continuous spiral groove 2a. The portion where the continuous spiral groove 2a is formed has a thickness smaller than the periphery of the continuous spiral groove 2a and is a portion which is easily broken. In addition, the breaking line is not limited to a spirally-formed form such as the continuous spiral groove 2a, and may be formed, for example, in an SZ-like shape, and can be any shape as long as it can be drawn out.

  Therefore, when the core ribbon 2b is pulled, the core member 2 is sequentially broken at the portion of the continuous spiral groove 2a and is continuously drawn out as a new core ribbon 2b. Since the continuous spiral grooves 2a are formed at a constant pitch, the width of the core ribbon 2b to be drawn out is also constant. However, it does not have to be constant. The continuous spiral groove 2a may be formed only on the inner peripheral surface of the core member 2, may be formed only on the outer peripheral surface, or may be formed on both the inner peripheral surface and the outer peripheral surface. In addition, the core member 2 having the continuous spiral groove 2a is produced, for example, by spirally swirling the core ribbon 2b and fixing the adjacent core ribbons 2b by bonding, welding, engagement, a combination thereof, or the like. It may be carried out by directly forming the continuous spiral groove 2a in the cylindrical member. In addition, as an expandable tubular hollow expanding member as described above, the expanding tubular member is in the form of a ribbon as described above, and the elastic tubular member 3 is sequentially contracted by unwinding the ribbon. There is also a mode in which the diameter holding member slides with respect to the elastic tubular member and is released by being pulled out of the elastic tubular member.

  The core member 2 has a first end 2c on the beginning side which is pulled out as the core ribbon 2b and a second end 2d on the end side which is pulled out as the core ribbon 2b. In the vicinity of the first end 2c, an exposed portion 2e in which the elastic tubular member 3 is not wound and the outer peripheral surface of the core member 2 is exposed is formed, and the elastic tubular member 3 is also wound near the second end 2d. Thus, an exposed portion 2f is formed where the outer peripheral surface of the core member 2 is exposed.

  The core ribbon 2b disassembled from the first end 2c is passed through the inside of the core member 2 and pulled out from the second end 2d side. As the core ribbon 2b is pulled out on the second end 2d side, the core member 2 is sequentially disassembled from the first end 2c toward the second end 2d. In the present embodiment, since the continuous spiral groove 2a is formed over the entire length of the core member 2, the core member 2 is completely disassembled from the first end 2c to the second end 2d. It is possible. However, the continuous spiral groove should just be formed in the part which diameter-retains the elastic tubular member 3 at least among the core members 2, for example, continuous in the predetermined range by the side of the 2nd end 2d There may be a portion where the spiral groove is not formed.

  The elastic tubular member 3 is a member held on the outer peripheral side of the core member 2 in a diameter-expanded state, and is formed in a tubular shape so as to cover a predetermined portion of the cable 10 and the connector 12. The elastic tubular member 3 is held by the core member 2 in a state in which the diameter is expanded. However, the core ribbon 2b of the core member 2 is pulled out and the core member 2 is dismantled in order, thereby disassembling the core Holding by the member 2 is gradually released. Then, the elastic tubular member 3 covers predetermined portions of the cable 10 and the connector 12 by contraction and diameter reduction of the elastic tubular member 3 in the portion.

  On the end 3 a side of the elastic tubular member 3, a plurality of dampers 3 b whose thickness is larger than that of the surroundings are formed at equal intervals in the axis L direction. The damper portion 3b reduces the impact transmitted to the inside of the elastic tubular member 3 when an impact is applied to the elastic tubular member 3 from the outside, and suppresses the breakage of the elastic tubular member 3 itself. In the present embodiment, the cable 10 and the connector 12 are covered inside the region where the damper portion 3 b of the elastic tubular member 3 is formed, so that the external impact on the cable 10 and the connector 12 is reduced. It is suppressed that the elastic tubular member 3 is damaged and the connector 12 etc. are exposed.

The elastic tubular member 3 is, for example, a cold-shrinkable tube made of a rubber that contracts at normal temperature and is excellent in stretchability. Since outdoor use is assumed in this embodiment, silicone rubber excellent in waterproofness and weather resistance is used as the material of the elastic tubular member 3. Here, the silicone rubber forming the elastic tubular member 3 has a property (vapor permeability) to easily permeate water vapor (for example, the water vapor permeability is about 60 g / m ² · 24 h). The detailed description of the water vapor permeability will be described later. Therefore, there is a possibility that rust may occur on the metal portion of the connector 12 or the like due to long-term use or the like. In order to prevent corrosion of the connector 12 which is a metal part, water (water vapor) or oxygen may be shut off. Therefore, in the present embodiment, in order to improve the corrosion resistance (corrosion resistance), an intermediate layer 8 having a low water vapor permeability is provided between the core member 2 of the coating treatment tool 1 and the elastic tubular member 3. There is. The elastic tubular member 3 is not limited to silicone rubber as long as it is an elastic material that shrinks at normal temperature and has excellent stretchability. For example, ethylene propylene rubber or natural rubber may be used.

The first layer 5 constituting the intermediate layer 8 is formed of a flowable putty-like material, and extends in the circumferential direction on the outer peripheral surface of the core member 2. In the present embodiment, since the metal connector 12 is covered by the range in which the damper portion 3 b is formed in the elastic tubular member 3, the first layer 5 is formed over the range in which the damper portion 3 b is formed. ing. Also, the edge of the first layer 5 is formed to coincide with the edge of the end 3 a of the elastic tubular member 3. However, the range in which the first layer 5 is disposed is not particularly limited, and may be appropriately changed in accordance with the positional relationship and the size of the cable and the connector to be covered. For example, in order to ensure waterproofness in the vicinity of the connector 12 and the connector 12 as the covering object, the size of the first layer 5 along the axis L direction is at least the entire connector 12 and the cable 10 in the vicinity of the connector 12 It is set to a size that can cover a part of As a material of the first layer 5, for example, a composite synthetic rubber material using silicone rubber, acrylic rubber, butyl rubber, ethylene propylene rubber, nitrile rubber, hydrin rubber or the like can be used. As a result, it is possible to form a layer that is waterproof, easily released from the core member, and has fluidity. The water vapor transmission rate of the first layer 5 is, for example, about 10 to 100 g / m ² · 24 h. The thickness of the first layer 5 may be, for example, about 0.8 mm to 1.6 mm as long as it can absorb the wrinkles of the sheet-like second layer 6 at the time of coating.

  Here, "a material having flowability" means, like the material constituting the elastic tubular member 3, an elastic material which returns to its original shape when the external force is applied and the external force does not act once. Unlike the material, it is a material that can be deformed according to an external force and maintain the shape after deformation even if the external force does not work. The material having flowability has shape following ability, and when pressed by a rigid member having a predetermined surface shape, follows the surface shape of the rigid member and deforms and adheres to the surface of the rigid member be able to. Therefore, in the state before covering, the first layer 5 having fluidity is sandwiched between the core member 2 and the elastic tubular member 3 to form a cylindrical shape along the outer peripheral surface of the core member 2. On the other hand, since the first layer 5 having fluidity is pressed from the outer peripheral side to the connector 12 and the cable 10 by the contracted elastic tubular member 3 at the time of coating, it follows the surface shapes of the connector 12 and the cable 10 It deforms and can be closely attached so that the surface of the connector 12 and the cable 10 may be covered. The fluid first layer 5 can also flow into, for example, the inward corner of the connector 12 or the like. Further, the second layer 6 is pressed against the first layer 5 having fluidity by the contracted elastic tubular member 3, so that the outer peripheral surface of the first layer 5 becomes the shape of the second layer 6. Follow and deform. For example, by adopting a material having a Mooney viscosity (JIS K 6300) of 10 to 40 ML (1 + 4) 100 ° C. or 20 to 25 ML (1 + 4) 100 ° C. as a value indicating the fluidity of the material forming the first layer 5 Sufficient shape followability can be secured. Further, as a value indicating the ease of releasing the material forming the first layer 5 with respect to the core member 2, for example, a material having a peeling force (force required for peeling) against polyethylene and polypropylene of 1 to 8 N / cm By adopting this, it is possible to secure the workability at the time of coating.

The second layer 6 is held between the core member 2 and the elastic tubular member 3 by extending in the circumferential direction on the entire outer peripheral surface of the first layer 5. In addition, the range which arrange | positions the 2nd layer 6 is not specifically limited, You may change suitably according to the positional relationship and magnitude | size of the cable and connector which become covering object similarly to the 1st layer 5. As shown in FIG. The second layer 6 in the present embodiment is formed of a sheet. The sheet is a thin film-like member having no flowability. As a material of the second layer 6, for example, a resin with a low water vapor transmission rate such as polyvinylidene chloride, polyethylene terephthalate, polyethylene, polypropylene, nylon can be used. The water vapor transmission rate of the second layer 6 may be, for example, 30 g / m ² · 24 h or less, and may be 20 g / m ² · 24 h or less. The thickness of the second layer 6 is, for example, about 10 to 50 μm, whereby processing workability can be ensured.

The intermediate layer 8 is configured by laminating the first layer 5 and the second layer 6. Therefore, the water vapor transmission rate of the intermediate layer 8 is smaller than the water vapor transmission rate of the first layer 5 or the second layer 6 whichever is smaller. In the present embodiment, the water vapor transmission rate of the intermediate layer 8 may be, for example, 20 g / m ² · 24 h or less, or 10 g / m ² · 24 h or less, or 5 g / m ² · 24 h It may be less.

Here, the water vapor transmission rate (water vapor transmission rate) was measured using a cup method in accordance with JIS Z0208. The water vapor transmission rate refers to the amount of water vapor passing through a film-like substance of a unit area in a fixed time, and at a temperature of 25 ° C. or 40 ° C., a moisture-proof packaging material is used as an interface surface. The amount of water vapor passing through this interface in 24 hours (g) is defined as the value converted to 1 m ^{2 of} the material when the air on the side of is kept dry by the hygroscopic agent.

  Next, the operation and effects of the coating treatment tool 1 according to the present embodiment will be described.

  The coating treatment tool 1 having the above-described configuration performs coating of the cable 10 and predetermined portions of the connector 12. With the connector 12 of the cable 10 fixed to the connector 20 of the communication device, the core ribbon 2 b of the coating treatment tool 1 having the cable 10 inserted therein is pulled out, whereby the elastic tubular member 3 The predetermined part is covered. At this time, due to the contraction and diameter reduction of the elastic tubular member 3, a force pressing the first layer 5 toward the cable 10 is applied, and the first layer 5 separated from the core member 2 is positioned inside It conforms to the shape of the connector 12 and the cable 10 and deforms. Thereby, the connector 12 and the cable 10 can be favorably covered by the first layer 5 without any gap.

  In addition, since the second layer 6 is disposed on the outer peripheral side of the first layer 5 having fluidity, when the elastic tubular member 3 is contracted, the deformation of the shape of the second layer 6 is not performed. Layer 5 can follow. Therefore, a material having predetermined properties (in the present embodiment, gas barrier properties) can be selected as the second layer 6. That is, the material of the second layer 6 has a predetermined property and at the same time it is not suitable for coming into contact with the object to be coated (for example, a property that can be wrinkled like a sheet), the elastic tubular member 3 and the core member Even if it has a property (for example, a property that the adhesion to the core member 2 is too strong) or the like which is not suitable for being disposed between the two, by disposing the first layer 5 on the inner circumferential side, The intermediate layer 8 can be applied as a member that functions as a gas barrier layer. Therefore, predetermined properties can be added to the coating treatment tool 1 while maintaining the function of coating the cable 10 and the like.

  In the present embodiment, since the second layer 6 is formed of a sheet, the shrinkage and diameter reduction of the elastic tubular member 3 form a crease in the second layer 6. Here, the layer formed between the core member 2 and the elastic tubular member 3 is formed only on the second layer 6 or on the outer peripheral side of the second layer 6 and the second layer 6 Consider the case where there is only a liquidity layer. In this case, there is a possibility that a gap may be formed between the second layer 6 and the cable 10 or the like due to the wrinkles formed in the second layer 6. In this case, there is a possibility that the waterproofness may be reduced by the infiltration of water from the gap.

  However, in the present embodiment, the second layer 6 is disposed on the outer periphery of the first layer 5 having fluidity, and the first layer 5 is formed sufficiently thick relative to the second layer 6. (In the present embodiment, the first layer 5 is 20 times or more the second layer 6). Therefore, the outer peripheral side of the first layer 5 is deformed in accordance with the weir formed in the second layer 6, and the weir formed in the second layer 6 is absorbed by the first layer 5 (second The folds of the layer are wrapped in the first layer). As a result, the ridge formed in the second layer 6 does not reach the cable 10 and the like, and the periphery of the cable or the like is maintained in the state of being covered by the first layer 5. Therefore, the gas barrier properties possessed by the second layer can be added to the coating treatment tool 1 while maintaining waterproofness.

Further, the water vapor transmission rate of the intermediate layer 8 is lower than the water vapor transmission rate of the elastic tubular member 3 and is about 20 g / m ² · 24 h or less. The water vapor that has permeated through the elastic tubular member 3 is mostly blocked by the intermediate layer 8. Therefore, it is suppressed that water vapor | steam reaches | attains cable 10 grade | etc.,. This improves the corrosion resistance of the coating treatment tool.

  The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the present invention.

  For example, although the example which the 2nd layer 6 is formed of the sheet | seat by 1 type of resin was shown, it is not limited to this. For example, it may be a sheet formed of metal foil such as aluminum foil. Moreover, the sheet | seat containing the several resin layer which laminated | stacked the sheet | seat by 2 or more types of different resin may be sufficient. Moreover, the sheet | seat containing the metal layer which vapor-deposited metal etc. to the sheet | seat formed with resin may be sufficient. Alternatively, the sheets may be stacked by winding the sheets around the first layer multiple times.

  Moreover, although the example which the 2nd layer 6 is formed of the sheet was shown, it is not limited to this. For example, a fluid member may be employed as the second layer. For example, when a layer made of a material having fluidity and being difficult to release is disposed between the core member and the elastic tubular member, the layer adheres to the core ribbon during the core member extraction operation. And there is a risk of peeling off from the inside of the elastic tubular member. However, even if it is such a layer, by forming in the outer periphery of the 1st layer 5, since it does not contact with a core member directly, it can utilize suitably. In addition, when the member which has fluidity | liquidity is employ | adopted as a 2nd layer in this way, the thickness of a 1st layer and a 2nd layer is not specifically limited. As a material of the second layer having such fluidity, for example, a composite synthetic rubber material using butyl rubber, acrylic rubber, ethylene propylene rubber, nitrile rubber, hydrin rubber or the like can be used. As described above, the fluid material used as the second layer is not particularly limited as long as it has fluidity. In addition, since it is not necessary to consider the ease of releasing the core member 2, there is no limitation on the degree of adhesion. Therefore, it is possible to adopt as the second layer 6 even a material (for example, peeling force of 10 N / cm or more) which has high adhesion and which is difficult to use as the first layer 5 and which is difficult to release. For example, a material having a Mooney viscosity (JIS K6300) of 10 to 40 ML (1 + 4) 100 ° C. or 16 to 22 ML (1 + 4) 100 ° C. may be adopted as a value indicating the fluidity of the material forming the second layer 6 . In the case where the second layer 6 is a member having fluidity, the thickness of the first layer 5 is not limited to that described above because it is not necessary to absorb wrinkles as in the case of a sheet. It is about 4 mm to 1.2 mm.

  Moreover, although the intermediate | middle layer 8 formed between the core member 2 and the elastic tubular member 3 showed the example which is the 1st layer 5 and the 2nd layer 6, it is not limited to this. For example, as shown in FIG. 4, as the intermediate layer 9 disposed between the core member 2 and the elastic tubular member 3, the third layer 7 having fluidity is provided on the outer peripheral side of the second layer 6. You may provide further. In this case, particularly when the second layer 6 is formed by a sheet, the wrinkles formed in the second layer 6 will be absorbed not only by the first layer 5 but also by the third layer 7 . As a result, no gap is formed between the second layer 6 and the elastic tubular member 3, and the cable 10 can be covered better. Thus, when the third layer 7 is further provided, the material used for the first layer 5 and the material used for the third layer 7 may be the same or different.

  Moreover, although the 1st layer 5 and the 2nd layer 6 showed the example arrange | positioned at the terminal end 3a side of the elastic tubular member 3, it is not limited to this. The first layer and the second layer are disposed at any position where the properties of these layers are required, and may be disposed, for example, over the entire longitudinal direction of the elastic tubular member.

[First test example]
The iron rod is coated with a coating treatment tool equipped with an elastic tubular member formed of silicone rubber and left outdoors immersed in water for 3 days, after which it is placed in an oven at a temperature of 85 ° C. and a humidity of 85%. It was left for a day to test the occurrence of rust. The combination of the first layer and the second layer is changed to provide examples 1 to 5. Further, Comparative Examples 1 to 8 were prepared. In Examples and Comparative Examples, a silicone rubber cold-shrinkable tube was used as the elastic tubular member.

In Example 1, a butyl sheet with a thickness of 1 mm was used as the first layer, and a polyethylene film was used as the second layer.
In Example 2, as the first layer, a composite synthetic rubber material (putty material) using silicone rubber is formed to a thickness of 0.8 mm, and polyethylene terephthalate is used as the second layer in a thickness of 25 μm. What was formed in sheet shape of was used.
In Example 3, as the first layer, a composite synthetic rubber material using silicone rubber was formed to a thickness of 0.8 mm, and as the second layer, polyvinylidene chloride (Saran wrap: one turn) was used as the second layer. A registered trademark was used.
In Example 4, a composite synthetic rubber material using silicone rubber was formed to a thickness of 0.8 mm as the first layer, and a composite synthetic rubber material using butyl rubber was used as the second layer. What was formed in 0.8 mm was used.
In Example 5, an aluminum-deposited film sheet was used as the second layer, using a 0.8 mm composite synthetic rubber material using silicone rubber as the first layer.
In Comparative Example 1, the first layer and the second layer were not provided.
In Comparative Example 2, the first layer was not provided, and one round of polyvinylidene chloride (Saran wrap: registered trademark) was used as the second layer.
In Comparative Example 3, a composite synthetic rubber material (putty material) using silicone rubber only at both ends as the first layer is disposed, and as the second layer, one-round polyvinylidene chloride (Saran wrap: registered trademark) Was used.
In Comparative Example 4, two-turn polyvinylidene chloride (Saran wrap: registered trademark) was used as the second layer without providing the first layer.
In Comparative Example 5, as the first layer, a composite synthetic rubber material (putty material) using silicone rubber only at both ends is disposed, and as the second layer, two-round polyvinylidene chloride (Saran wrap: registered trademark) Was used.
In Comparative Example 6, the first layer was not provided, and one round of polyvinylidene chloride (Saran wrap: registered trademark) was used as the second layer. However, both ends are not wound.
In Comparative Example 7, a two-turn polyvinylidene chloride (Saran wrap: registered trademark) was used as the second layer without providing the first layer. However, both ends are not wound.
In Comparative Example 8, the first layer was not provided, and one round of polyvinylidene chloride (Saran wrap: registered trademark) was used as the second layer. However, in order to simulate the contracted state, the polyvinylidene chloride was wound in a sufficiently crimped state.

  In each of Comparative Examples 1 to 8, rusting occurred but in Examples 1 to 5, no rusting was observed.

Second Embodiment
Next, with reference to FIGS. 5 and 6, the coating treatment tool according to the second embodiment will be described. The coating treatment tool according to the present embodiment covers the connection portion between the cables, and for example, use in an environment where it is always immersed in water is also assumed. In such an environment, when the connecting portion between the cables is covered with the covering member described in Patent Document 1, if the covering member has moisture permeability, rust may occur in the connecting portion. In addition, when there is a flaw on the cable sheath, the flaw can not be filled with the covering member, and there is a possibility that water may infiltrate into the connection portion from the gap between the covering member and the flaw. In the present embodiment, by providing the fluid middle layer, it is possible to suppress the entry of water and the like even under an environment always submerged in water. Hereinafter, points different from the first embodiment will be mainly described, and the same elements and members will be denoted by the same reference numerals and detailed description will be omitted.

  FIG. 5 is a partial cross-sectional view showing the coating treatment tool 1B according to the present embodiment. FIG. 6 is a cross-sectional view showing a state in which the cable 10B is covered using the covering treatment tool 1B. As shown in FIG. 5, the coating treatment tool 1B includes a core member 2, an elastic tubular member 3B held in a state of being expanded in diameter on the outer periphery of the core member 2, a core member 2 and an elastic tubular member 3B. And an intermediate layer 8B held therebetween. The cable 10B shown in FIG. 6 is, for example, a power cable. The cable 10B includes a conductor 11B, an insulator 14B covering the conductor 11B, and a sheath 12B covering the insulator 14B. The conductors 10B are electrically connected to each other by the sleeve 13B in a state in which the insulators 14B and the sheaths 12B at the tips are peeled off. In the coating treatment tool 1B according to the present embodiment, the volume resistivity of the elastic tubular member 3B and the intermediate layer 8B is high (for example, 1 TΩ · m) so as to correspond to the connection between the power cables 10B. Or more).

  As shown in FIG. 5, the elastic tubular member 3 </ b> B is a tubular member held on the outer peripheral side of the core member 2 in the diameter-expanded state, similarly to the elastic tubular member 3 in the first embodiment. The elastic tubular member 3B is held by the core member 2 in a state of being expanded in diameter, and disassembling the core member 2 forms an outer jacket covering the periphery of the connection portion (sleeve 13B) of the cables 10B.

The elastic tubular member 3 </ b> B is, for example, a cold-shrinkable tube composed of a rubber that contracts at normal temperature and is excellent in stretchability. In the present embodiment, since use in an environment where it is always immersed in water is also assumed, as a material of the elastic tubular member 3B, ethylene propylene rubber (EPDM) excellent in waterproofness, moisture impermeability and weatherability is used. Used. Here, the water vapor transmission rate of the ethylene-propylene rubber forming the elastic tubular member 3B is, for example, about 2.0 g / m ² · 24 h. The elastic tubular member 3B is not limited to ethylene propylene rubber as long as it is an elastic material that shrinks at normal temperature and has excellent stretchability. For example, silicone rubber or natural rubber may be used.

  The intermediate layer 8B is configured to include a first layer 5B and a second layer 6B provided on the outer periphery of the first layer 5B. In the intermediate layer 8B in the present embodiment, the first layer 5B and the second layer 6B are both formed of a putty-like material having fluidity. The first layer 5 </ b> B extends in the circumferential direction on the outer peripheral surface of the core member 2. The second layer 6B is held between the core member 2 and the elastic tubular member 3B by extending in the circumferential direction so as to overlap the entire outer peripheral surface of the first layer 5B. In the present embodiment, the edges in the direction of the axis L are substantially the same between the first layer 5B and the second layer 6B. For example, the edge of the first layer 5B is the edge of the second layer 6B It may protrude beyond the end, or the edge of the second layer 6B may protrude beyond the edge of the first layer 5B. Further, the width of the intermediate layer 8B in the direction of the axis L is formed narrower than the width of the elastic tubular member 3B. Thus, the intermediate layer 8B is entirely covered by the elastic tubular member 3B without protruding to the outside of the elastic tubular member 3B. Further, the inner circumferential surfaces of both ends of the elastic tubular member 3B are in contact with the outer circumferential surface of the core member 2.

The material of the first layer 5B is, similarly to the first layer 5 of the first embodiment, a composite synthetic rubber material using, for example, silicone rubber, acrylic rubber, butyl rubber, ethylene propylene rubber, nitrile rubber, hydrin rubber, etc. Can be used. As a result, it is possible to form a layer that is waterproof, easily released from the core member 2, and has fluidity. The water vapor transmission rate of the first layer 5B is, for example, about 10 to 100 g / m ² · 24 h, but is not limited thereto. Moreover, although the thickness of the 1st layer 5B is about 0.4 mm-1.2 mm, for example, it is not limited to this. By adopting, for example, a material having a Mooney viscosity (JIS K6300) of 10 to 40 ML (1 + 4) 100 ° C. or 20 to 25 ML (1 + 4) 100 ° C. as a value indicating the fluidity of the material forming the first layer 5B. Sufficient shape followability can be secured. Further, as a value indicating the ease of releasing the material forming the first layer 5B to the core member 2, for example, a material having a peeling force (force required for peeling) to polyethylene and polypropylene of 1 to 8 N / cm By adopting this, it is possible to secure the workability at the time of coating. The peeling force of the first layer 5B is smaller than the peeling force of the second layer 6B. That is, the first layer 5B peels off the core member 2 more easily than the second layer 6B.

For the second layer 6B, for example, a composite synthetic rubber material using butyl rubber, acrylic rubber, ethylene propylene rubber, nitrile rubber, hydrin rubber or the like can be used. The flowable material used as the second layer 6B does not have to consider ease of releasing the core member 2, and there is no restriction on the degree of adhesion. Therefore, a material which is difficult to use as the first layer 5B and which has a high degree of adhesion and which is difficult to be released (for example, a peeling force of 10 N / cm or more) can be adopted as the second layer 6B. For example, a material having a Mooney viscosity (JIS K6300) of 10 to 40 ML (1 + 4) 100 ° C. or 16 to 22 ML (1 + 4) 100 ° C. may be adopted as a value indicating the fluidity of the material forming the second layer 6B. . The water vapor permeability of the second layer 6B may be, for example, 30 g / m ² · 24 h or less, and may be 20 g / m ² · 24 h or less. The thickness of the second layer 6B is, for example, about 0.4 mm to 2.0 mm, but is not limited to this.

The intermediate layer 8B is configured by laminating the first layer 5B and the second layer 6B. Therefore, the water vapor transmission rate of the intermediate layer 8B is smaller than the water vapor transmission rate of the first layer 5B or the second layer 6B, whichever is smaller. In the present embodiment, the water vapor permeability of the intermediate layer 8B may be, for example, 20 g / m ² · 24 h or less, or 10 g / m ² · 24 h or less, or 5 g / m ² · 24 h or less May be

  Next, the operation and effects of the coating treatment tool according to the present embodiment will be described.

  The coating processing tool 1B having the configuration as described above performs coating of the connection portion between the cables 10B. In a state where the cables 10B are connected by the sleeve 13B, the core ribbon 2b of the coating treatment tool 1B in which the cable 10B is inserted is pulled out, so that the connection portion between the cables 10B is covered by the elastic tubular member 3B. At this time, due to the contraction and diameter reduction of the elastic tubular member 3B, a force for pressing the first layer 5B and the second layer 6B toward the cable 10B is applied, and the first layer 5B released from the core member 2 And the second layer 6B deforms to follow the shape of the cable 10B located inside. At this time, even if the cable 10B is scratched, the first layer 5B is deformed to fill the scratch. Accordingly, the periphery of the connection portion between the cables 10B can be favorably covered by the first layer 5B and the second layer 6B without any gap, and waterproofness can be provided. In particular, since both the first layer 5B and the second layer 6B have fluidity, both the cable 10B side and the elastic tubular member 3B side are in close contact with the intermediate layer 8B.

  Also, in the past, in an environment in which water is always submerged, a resin construction method has been used in some cases. In this construction method, a plastic mold case is covered around the connection portion of the cable 10B, and a two-part, room-temperature curing resin consisting of, for example, an epoxy resin and a urethane resin is injected into the mold case to harden the resin. By covering the cable 10B, the cable 10B connection portion is covered. In such a resin construction method, it is necessary to wait for hardening of the resin, and it takes time for the work. When the resin construction method is not used, a waterproof tape may be previously wound around the connection portion of the cable 10B and then covered with a covering member. In the present embodiment, the coating of the cable 10B connection portion is completed by pulling out the core member 2. Therefore, no member (such as a waterproof tape) other than the coating processing tool 1B is necessary, and no time is required for curing the resin, so the operation is simple and the operation time is shortened.

  Further, the first layer 5B has a property of being more easily peeled off from the core member 2 than the second layer 6B. In this case, even if the second layer 6B has the property of being difficult to peel off the core member 2, the second layer 6B can be suitably used because it does not directly contact the core member 2.

  Further, in the present embodiment, as an example, the first layer 5B is formed of a composite synthetic rubber material containing silicone rubber. In this case, a composite synthetic rubber material containing butyl rubber that is less likely to peel from the core member 2 compared to the first layer 5B can be used as the second layer 6B. The water vapor transmission rate of the intermediate layer 8B can be reduced by using a composite synthetic rubber material containing butyl rubber having a low water vapor transmission rate as compared to a composite synthetic rubber material containing a silicone rubber. Thereby, the coating treatment tool 1B can be provided not only with waterproofness but also with rustproofness.

  The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the present invention. For example, as in the coating treatment tool 1C shown in FIG. 7, another elastic tubular member 3C may be attached to the outer periphery of the elastic tubular member 3B. In this case, the elastic tubular member 3B and the elastic tubular member 3C may be formed of the same material, or may be formed of different materials. With such a configuration, the strength of the outer layer portion of the coating treatment tool 1C can be increased. The strength may be further enhanced by providing a film layer made of, for example, polyethylene terephthalate between the elastic tubular member 3B and the elastic tubular member 3C.

[Second test example]
A test for confirming waterproofness was conducted using a coating treatment tool formed based on the second embodiment. The power cable connected by the sleeve was covered with a coating treatment tool, and a voltage of 1 kV was applied in a water tank with a water temperature of 40 ° C. and a water depth of 1 m, and the insulation resistance was measured after 3000 hours. The tests were carried out with two types of cables: wounded power cables reaching the insulator to the sheath and undamaged power cables.

An ethylene-propylene rubber is used as the elastic tubular member, and a composite synthetic rubber material using silicone rubber is formed to a thickness of 0.5 mm as the first layer, and butyl rubber is used as the second layer. The composite synthetic rubber material used was formed to a thickness of 0.5 mm. Prior to the test, when the water vapor transmission rate (water vapor transmission rate) was measured using a cup method according to JIS Z0208, the water vapor transmission rate of the ethylene-propylene rubber forming the elastic tubular member was 2.0 g / m ² · 24 h The water vapor transmission rate of the composite synthetic rubber material containing silicone rubber forming the first layer is 50 g / m ² · 24 h, and the water vapor transmission of the composite synthetic rubber material using butyl rubber forming the second layer The degree was 0.1 g / m ² · 24 h.

  As a result of the test, the insulation resistance after 3000 hours was 2000 MΩ or more, and no abnormality was found in any of the damaged cable and the non-damaged cable.

  1, 1 B: Coating treatment tool, 2: Core member (diameter-expanding holding member) 3, 3B, 3C: Elastic tubular member, 5, 5B: first layer, 6, 6B: second layer, 7: seventh 3 layers, 8, 8B, 9 ... middle layer, 10, 10B ... cables, 12 ... connectors.

Claims (4)

It is held between a retractable tubular hollow expanding member, an elastic tubular member held in a state of being expanded in the outer peripheral side of the expanding member, an expanded holding member, and the elastic tubular member. And an intermediate layer,
It is a covering treatment tool which covers a cable and / or a connector with said elastic tubular member which said elastic tubular member contracts by retracting said diameter expansion holding member, and which is contracted,
The intermediate layer possess a first layer having a fluidity, a second layer is further formed on the outer peripheral side of the first layer, and
The second layer, Ru is formed by a member having fluidity, coating treatment device.   The coating treatment tool according to claim 1, wherein the intermediate layer has a water vapor transmission rate of 20 g / m 2 · 24 h or less. The first layer is easily peeled off from said radially enlarged retaining member than the second layer, coating treatment device according to claim 1 or 2. The coating process according to any one of claims 1 to 3, wherein the first layer is formed of a composite synthetic rubber containing silicone rubber, and the second layer is formed of a composite synthetic rubber material containing butyl rubber. Equipment.

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