JP2015144548A - Coating processing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating processing tool capable of adding a predetermined nature while maintaining a function of coating a cable etc.SOLUTION: A coating processing tool 1 includes: an extractable tubular hollow core member 2 (expanded diameter retention member); an elastic tubular member 3 retained on the outer periphery side of the core member 2 in a state of an expanded diameter; and an intermediate layer 8 retained between the core member 2 and the elastic tubular member 3. By the extraction of the core member 2, the elastic tubular member 3 shrinks, so that a cable 10 and/or a connector 12 is coated by the shrunk elastic tubular member 3. The intermediate layer 8 includes a fluid first layer 5 and a second layer 6 formed on the further outer peripheral side of the first layer 5.

Description

  The present invention relates to a coating processing tool.

  Conventionally, as a covering treatment tool for waterproofing and insulating a cable connecting portion where a cable is connected in a straight line and a cable connecting portion where a terminal is connected at the end of a cable, a dismantling wire formed on a wall surface over the entire length 2. Description of the Related Art A covering processing tool is known that includes a tubular hollow core member having a tube member made of an elastic material such as rubber held in an expanded state on the outer peripheral side of the core member (for example, Patent Document 1). reference).

Japanese Patent Publication No.49-46190

  Here, a specific material may be disposed between the tube member and the core member in order to add or improve a predetermined property to the covering processing tool. In this case, it is difficult to coat the cable and the like, and if the material is forcibly disposed, the function of covering the cable and the like may be deteriorated.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a covering processing tool capable of adding a predetermined property while maintaining a function of covering a cable or the like.

  The covering processing tool which concerns on one form of this invention is the tubular hollow diameter expansion holding member which can be pulled out, the elastic tubular member hold | maintained in the state expanded to the outer peripheral side of the diameter expansion holding member, and a diameter expansion holding member And an intermediate layer held between the elastic tubular member, the elastic tubular member contracts by pulling out the expanded diameter holding member, and the cable and / or the connector is covered by the contracted elastic tubular member In the processing tool, the intermediate layer includes a first layer having fluidity and a second layer formed further on the outer peripheral side of the first layer.

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

In the covering processing tool which concerns on another form, an intermediate | middle layer may have a water-vapor permeability of 20 g / m < ² > * 24h or less.

  In the covering processing tool which concerns on another form, a 2nd layer may be formed with a sheet | seat.

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

  In the coating processing tool according to another aspect, the sheet may include a metal layer.

  In the covering processing tool which concerns on another form, a 2nd layer may be formed of the member which has fluidity | liquidity.

  In the coating processing 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 covering processing tool which concerns on another form, a 1st layer is easy to peel from a diameter expansion holding member rather than a 2nd layer.

  In the coating processing 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.

  ADVANTAGE OF THE INVENTION According to this invention, the coating processing tool which can add a predetermined | prescribed property can be provided, maintaining the function which coat | covers a cable etc.

It is a fragmentary longitudinal cross-section which shows the covering processing tool which concerns on 1st Embodiment. It is a cross-sectional view of the covering processing tool according to the first embodiment. It is a figure which shows the state which coat | covered the connector using the coating processing tool which concerns on 1st Embodiment. It is a cross-sectional view which shows the modification of a coating processing tool. It is a fragmentary longitudinal cross-section which shows the coating 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 processing tool which concerns on 2nd Embodiment. It is a fragmentary longitudinal cross-section which shows the modification of a coating 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 equivalent elements will be 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 processing tool 1 which concerns on this embodiment. FIG. 3 is a diagram illustrating a state in which the connector side of the cable 10 is covered with the covering processing tool 1. 1 and 3 show a view in which a part of the elastic tubular member 3 (left side of the axis L) is peeled off so that the inside of the elastic tubular member 3 in the covering treatment tool 1 can be seen. A cable 10 shown in FIG. 3 is a communication cable in a communication device (not shown) such as a wireless device, for example. A connector 12 is connected to the terminal end side of the insulated 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 an object to be covered by the covering processing tool 1, there is an aspect in which the connection part between the cables 10 is covered other than an aspect in which the connection part between the connector 20 of the communication device and the connector 12 of the cable 10 shown in FIG. 3 is covered. is assumed.

  In the present embodiment, the term “cable” includes not only a communication cable but also a coaxial cable such as a cable for CATV, an optical communication cable, a power cable, and the like. Note that the lower side (terminal 3a side) of the paper surface of FIG. 1 is the terminal side, and the upper side (opposite side of the terminal member 3a) of FIG.

  Although the covering treatment tool 1 is used for both indoor use and outdoor use, in this embodiment, it will be described as an outdoor use. As shown in FIG. 1, a covering processing 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 diameter expanded state 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 includes a first layer 5 having fluidity and a 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 dismantling line formed on the wall surface over the entire length. The dismantling line is provided so as to gradually advance in the direction of the axis L while rotating around the axis L of the core member 2 or rotating and reversing. In the present embodiment, a continuous spiral groove 2a is provided as a dismantling line so as to gradually advance in the direction of the axis L (the axial direction of the expanded diameter holding member) while circling around the axis L of the core member 2. It has been. 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 string-like body along the continuous spiral groove 2a. The portion where the continuous spiral groove 2a is formed has a smaller thickness than the periphery of the continuous spiral groove 2a and is easily broken. Further, the dismantling line is not limited to a spiral shape such as the continuous spiral groove 2a, and may be formed in, for example, an SZ shape, and may have any shape as long as it can be pulled out.

  Therefore, when the core ribbon 2b is pulled, the core member 2 is sequentially broken at the continuous spiral groove 2a, and is continuously pulled out as a new core ribbon 2b. Since the continuous spiral groove 2a is formed at a constant pitch, the width of the core ribbon 2b that is pulled out is also constant. However, it may not 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. The core member 2 having the continuous spiral groove 2a is manufactured by, for example, rotating the core ribbon 2b spirally and fixing the adjacent core ribbons 2b by bonding, welding, engagement, or a combination thereof. Alternatively, it may be performed by directly forming the continuous spiral groove 2a in the cylindrical member. In addition, as a tubular hollow diameter-expanding holding member that can be pulled out, there is an aspect in which the diameter-expanding holding member has a ribbon shape as described above, and the elastic tubular member 3 is gradually reduced in diameter by releasing the ribbon. There is also an aspect in which the diameter holding member is detached by sliding with respect to the elastic tubular member and being pulled out from the elastic tubular member.

  The core member 2 has a first end portion 2c that is a start end side that is pulled out as the core ribbon 2b, and a second end portion 2d that is a terminal end side that is pulled out as the core ribbon 2b. An exposed portion 2e is formed in the vicinity of the first end 2c so that the elastic tubular member 3 is not wound and the outer peripheral surface of the core member 2 is exposed, and the elastic tubular member 3 is also wound in the vicinity of the second end 2d. Instead, an exposed portion 2f where the outer peripheral surface of the core member 2 is exposed is formed.

  The core ribbon 2b disassembled from the first end 2c is passed through the core member 2 and pulled out from the second end 2d side. When 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 this 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 expands and hold | maintains the diameter of the elastic tubular member 3 among the core members 2, For example, it continues in the predetermined range by the 2nd edge part 2d side. There may be a portion where the spiral groove is not formed.

  The elastic tubular member 3 is a member that is held on the outer peripheral side of the core member 2 in an expanded state, and is formed in a tubular shape so as to be a jacket that covers predetermined portions of the cable 10 and the connector 12. The elastic tubular member 3 is held by the core member 2 in an expanded state. However, the core ribbon 2b of the core member 2 is pulled out and the core member 2 is sequentially disassembled, whereby the core at the disassembled portion is obtained. The holding by the member 2 is gradually released. Then, the elastic tubular member 3 contracts and reduces the diameter of the elastic tubular member 3, and thereby the elastic tubular member 3 covers predetermined portions of the cable 10 and the connector 12.

  On the end 3a side of the elastic tubular member 3, a plurality of damper portions 3b having a thickness larger than 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 and prevents the elastic tubular member 3 itself from being damaged when an impact is applied to the elastic tubular member 3 from the outside. In the present embodiment, the cable 10 and the connector 12 are covered inside the region where the damper portion 3b of the elastic tubular member 3 is formed, so that impact from the outside 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 and the like are exposed.

The elastic tubular member 3 is, for example, a room temperature shrinkable tube made of rubber that shrinks at room temperature and has excellent stretch properties. In this embodiment, since the outdoor use is assumed, 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 (moisture permeability) that allows water vapor to easily pass through (for example, the water vapor permeability is about 60 g / m ² · 24 h). A detailed description of the water vapor permeability will be described later. For this reason, there is a risk that rust will occur in the metal parts such as the connector 12 due to long-term use or the like. In order to prevent corrosion of the connector 12 which is a metal part, moisture (water vapor) or oxygen may be blocked. Therefore, in the present embodiment, in order to improve rust prevention (corrosion resistance), an intermediate layer 8 having a low water vapor permeability is provided between the core member 2 and the elastic tubular member 3 of the coating treatment tool 1. Yes. The elastic tubular member 3 is not limited to silicone rubber as long as it is an elastic material that contracts at room temperature and has excellent stretch properties. For example, it may be ethylene propylene rubber or natural rubber.

The first layer 5 constituting the intermediate layer 8 is formed of a putty-like material having fluidity, 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 3b is formed in the elastic tubular member 3, the first layer 5 is formed over the range in which the damper portion 3b is formed. ing. The edge of the first layer 5 is formed so as to coincide with the edge of the terminal 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 according to the positional relationship and size of the cable or connector to be covered. For example, when the waterproof property in the vicinity of the connector 12 and the connector 12 is to be secured 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. Thereby, it is waterproof, can be easily released from the core member, and a fluid layer can be formed. Further, the water vapor permeability of the first layer 5 is, for example, about 10 to 100 g / m ² · 24 h. Moreover, the thickness of the 1st layer 5 should just be the thickness which can absorb the wrinkle of the sheet-like 2nd layer 6 at the time of a coating | cover, for example, is about 0.8 mm-1.6 mm.

  Here, the “material having fluidity” is an elastic material that returns to its original shape when the external force is no longer applied even if the external force is applied and deformed once, such as the material constituting the elastic tubular member 3. In contrast, when an external force is applied, the material is deformed in accordance with it and can maintain the shape after the deformation even when the external force is no longer applied. The material having fluidity has shape followability, and when pressed by a rigid member having a predetermined surface shape, the material follows the surface shape of the rigid member and deforms to adhere to the surface of the rigid member. be able to. Therefore, in the state before coating, the fluid first layer 5 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 against the connector 12 and the cable 10 from the outer peripheral side by the contracted elastic tubular member 3 at the time of coating, it follows the surface shape of the connector 12 and the cable 10. It deform | transforms and can contact | adhere so that the surface of the connector 12 and the cable 10 may be covered. The first layer 5 having fluidity can also flow into, for example, a corner of the connector 12. Further, the second layer 6 is pressed against the fluidized first layer 5 by the contracted elastic tubular member 3, so that the outer surface of the first layer 5 has the shape of the second layer 6. Follow and deform. By adopting 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 5, for example. Sufficient shape followability can be ensured. Moreover, as a value which shows the ease of mold release with respect to the core member 2 of the material which forms the 1st layer 5, the material whose peeling force (force required for peeling) with respect to polyethylene and polypropylene is 1-8 N / cm, for example. By adopting, workability at the time of covering can be secured.

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 in which the second layer 6 is disposed is not particularly limited, and may be appropriately changed according to the positional relationship and size of the cable or connector to be covered, as in the first layer 5. The second layer 6 in the present embodiment is formed by a sheet. A sheet | seat is a thin film-like member which does not have fluidity | liquidity. As a material of the second layer 6, for example, a resin having a low water vapor permeability such as polyvinylidene chloride, polyethylene terephthalate, polyethylene, polypropylene, or nylon can be used. The water vapor permeability 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, so that workability can be ensured.

The intermediate layer 8 is configured by laminating a first layer 5 and a second layer 6. Therefore, the water vapor permeability of the intermediate layer 8 is a smaller value than the smaller one of the water vapor permeability of the first layer 5 or the second layer 6. In the present embodiment, the water vapor permeability 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 as follows.

Here, the water vapor permeability (moisture permeability) was measured using a cup method based on JIS Z0208. Water vapor permeability refers to the amount of water vapor that passes through a membrane material of a unit area in a certain time. At a temperature of 25 ° C. or 40 ° C., the moisture-proof packaging material is the boundary surface, the air on one side is 90% relative humidity, the other Is defined as the value converted to the mass (g) of water vapor passing through this interface surface for 24 hours per 1 m ^{2 of} the material.

  Next, the operation and effect of the covering processing tool 1 according to the present embodiment will be described.

  The covering processing tool 1 having the above-described configuration covers predetermined portions of the cable 10 and the connector 12. With the connector 12 of the cable 10 fixed to the connector 20 of the communication device, the core ribbon 2b of the covering processing tool 1 with the cable 10 inserted inside is pulled out, so that the elastic tubular member 3 allows the cable 10 and the connector 12 to be connected. A 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 released from the core member 2 is positioned inside. It deforms following the shape of the connector 12 or the cable 10. Thereby, the connector 12 and the cable 10 can be satisfactorily covered by the first layer 5 without a 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 contracts, the first layer 6 is deformed by the deformation of the second layer 6. Layer 5 can follow. Therefore, a material having a predetermined property (in this embodiment, a gas barrier property) can be selected as the second layer 6. That is, the material of the second layer 6 has a predetermined property as well as a property that is not suitable for being brought into contact with the object to be coated (for example, a property that is easily wrinkled like a sheet), the elastic tubular member 3 and the core member. Even if it has a property that is not suitable to be disposed between the core layer 2 and the like (for example, a property in which the adhesive force to the core member 2 is too strong), by arranging the first layer 5 on the inner peripheral side, The intermediate layer 8 can be applied as a member that functions as a gas barrier layer. Therefore, it is possible to add a predetermined property to the covering processing tool 1 while maintaining the function of covering the cable 10 and the like.

  In the present embodiment, since the second layer 6 is formed of a sheet, wrinkles are formed in the second layer 6 due to the contraction and diameter reduction of the elastic tubular member 3. Here, when the layer formed between the core member 2 and the elastic tubular member 3 is only the second layer 6, it is formed on the outer peripheral side of the second layer 6 and the second layer 6. Consider the case where there is only a fluid layer. In this case, there is a possibility that a gap is 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 lowered due to water entering 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 to be sufficiently thick with respect to the second layer 6. (In this embodiment, the first layer 5 is 20 times or more of the second layer 6). Therefore, the outer peripheral side of the first layer 5 is deformed in accordance with the wrinkles formed in the second layer 6, and the wrinkles formed in the second layer 6 are absorbed by the first layer 5 (second Layer folds are wrapped in the first layer). Thereby, the wrinkles formed in the second layer 6 do not reach the cable 10 or the like, and the state where the periphery of the cable or the like is covered with the first layer 5 is maintained. Therefore, the gas barrier property of the second layer can be added to the covering treatment tool 1 while maintaining waterproofness.

Further, the water vapor permeability of the intermediate layer 8 is lower than the water vapor permeability of the elastic tubular member 3 and is about 20 g / m ² · 24 h or less. Most of the water vapor that has passed through the elastic tubular member 3 is blocked by the intermediate layer 8. Therefore, it is suppressed that water vapor reaches the cable 10 or the like. Thereby, the rust prevention property of a coating processing tool improves.

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

  For example, although the example in which the 2nd layer 6 was formed with the sheet | seat by one type of resin was shown, it is not limited to this. For example, a sheet formed of a metal foil such as an aluminum foil may be used. Moreover, the sheet | seat containing the some resin layer which laminated | stacked the sheet | seat by two or more types of different resin may be sufficient. Moreover, the sheet | seat containing the metal layer which vapor-deposited the metal etc. on the sheet | seat formed of resin may be sufficient. Further, the sheets may be overlapped by, for example, winding the sheet around the first layer a plurality of times.

  Moreover, although the example in which the 2nd layer 6 was formed with the sheet | seat 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 that has fluidity and is difficult to release from the core member is disposed between the core member and the elastic tubular member, the layer adheres to the core ribbon during the drawing operation of the core member. There is a risk of peeling from the inside of the elastic tubular member. However, even such a layer can be suitably used because it is formed on the outer periphery of the first layer 5 and is not in direct contact with the core member. 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 the 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. Thus, the fluid material used as the second layer is not particularly limited as long as it has fluidity. Moreover, since it is not necessary to consider the ease of mold release with respect to the core member 2, there is no restriction | limiting with respect to adhesiveness. Therefore, even a material that is difficult to be used as the first layer 5 and has a high degree of adhesion and is difficult to release (for example, a peeling force of 10 N / cm or more) can be used as the second layer 6. As a value indicating the fluidity of the material forming the second layer 6, 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. . When the second layer 6 is a fluid member, it is not necessary to absorb wrinkles like a sheet, so the thickness of the first layer 5 is not limited to that described above. 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 an intermediate layer 9 disposed between the core member 2 and the elastic tubular member 3, a third layer 7 having fluidity is provided on the outer peripheral side of the second layer 6. Further, it may be provided. In this case, particularly, when the second layer 6 is formed of a sheet, wrinkles formed on the second layer 6 are 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 more satisfactorily covered. 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. A 1st layer and a 2nd layer are arrange | positioned in the arbitrary positions where the property which these layers need is needed, for example, may be arrange | positioned over the whole longitudinal direction of an elastic tubular member.

[First Test Example]
Using a covering treatment tool provided with an elastic tubular member made of silicone rubber, a steel bar is covered, and left outdoors for 3 days in a state of being immersed in water, and then placed in an oven at a temperature of 85 ° C. and a humidity of 85%. It was left for days and tested for the occurrence of rust. Example 1 to Example 5 were made by changing the combination of the first layer and the second layer. Further, Comparative Examples 1 to 8 were prepared. In the examples and comparative examples, a normal temperature shrinkable tube made of silicone rubber was used as the elastic tubular member.

In Example 1, a butyl sheet having a thickness of 1 mm was used as the first layer, and a polyethylene film was used as the second layer.
In Example 2, a composite synthetic rubber material (putty material) using silicone rubber formed to a thickness of 0.8 mm was used as the first layer, and polyethylene terephthalate was 25 μm thick as the second layer. The one formed into a sheet shape was used.
In Example 3, a composite synthetic rubber material using silicone rubber formed to a thickness of 0.8 mm was used as the first layer, and one turn of polyvinylidene chloride (Saran wrap: Registered trademark).
In Example 4, a composite synthetic rubber material using silicone rubber having a thickness of 0.8 mm was used as the first layer, and a composite synthetic rubber material using butyl rubber was used as the second layer. The one formed to a thickness of 0.8 mm was used.
In Example 5, a composite synthetic rubber material using silicone rubber formed to a thickness of 0.8 mm was used as the first layer, and an aluminum vapor deposited film sheet was used as the second 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 turn 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 was disposed only at both ends as the first layer, and one turn of polyvinylidene chloride (Saran wrap: registered trademark) as the second layer. ) Was used.
In Comparative Example 4, the first layer was not provided, and a two-turn polyvinylidene chloride (Saran Wrap: registered trademark) was used as the second layer.
In Comparative Example 5, as the first layer, a composite synthetic rubber material (putty material) using silicone rubber was disposed only at both ends, and as the second layer, two-turn polyvinylidene chloride (Saran Wrap: registered trademark). ) Was used.
In Comparative Example 6, the first layer was not provided, and one turn of polyvinylidene chloride (Saran Wrap: registered trademark) was used as the second layer. However, both ends are not wound.
In Comparative Example 7, the first layer was not provided, and a 2-turn polyvinylidene chloride (Saran Wrap: registered trademark) was used as the second layer. However, both ends are not wound.
In Comparative Example 8, the first layer was not provided, and one turn of polyvinylidene chloride (Saran Wrap: registered trademark) was used as the second layer. However, in order to simulate the contracted state, it was wound in a state where the polyvinylidene chloride was sufficiently wrinkled.

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

[Second Embodiment]
Next, with reference to FIG. 5 and 6, the covering processing tool which concerns on 2nd Embodiment is demonstrated. The covering processing tool which concerns on this embodiment covers the connection part of cables, for example, the use in the 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, the connecting portion may be rusted. Further, when there is a scratch on the cable sheath, the covering member cannot fill the scratch, and there is a possibility that water may enter the connecting portion from the gap between the covering member and the scratch. In this embodiment, by providing an intermediate layer having fluidity, infiltration of water or the like is suppressed even in an environment where it is always immersed 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 thereof will be omitted.

  FIG. 5 is a partial cross-sectional view showing the covering processing tool 1B according to the present embodiment. FIG. 6 is a cross-sectional view showing a state where the cable 10B is covered with the covering processing tool 1B. As shown in FIG. 5, the covering processing tool 1 </ b> B includes a core member 2, an elastic tubular member 3 </ b> B held in an expanded state on the outer periphery of the core member 2, and the core member 2 and the elastic tubular member 3 </ b> B. And an intermediate layer 8B held therebetween. A cable 10B illustrated in FIG. 6 is, for example, a power cable. The cable 10B includes a conductor 11B, an insulator 14B that covers the conductor 11B, and a sheath 12B that covers the insulator 14B. The insulated cables 10B are electrically connected to each other by the sleeve 13B with the insulator 14B and the sheath 12B at the distal end being peeled off. In the covering treatment tool 1B according to the present embodiment, the volume specific resistance of the elastic tubular member 3B and the intermediate layer 8B is high (for example, 1 TΩ · m so that the power cable 10B can be connected to the power cable 10B. Above).

  As shown in FIG. 5, the elastic tubular member 3 </ b> B is a tubular member that is held on the outer peripheral side of the core member 2 in the expanded state, like the elastic tubular member 3 in the first embodiment. The elastic tubular member 3B is held by the core member 2 in an expanded state, and becomes an outer covering that covers the periphery of the connection portion (sleeve 13B) between the cables 10B by disassembling the core member 2.

The elastic tubular member 3B is, for example, a room temperature shrinkable tube made of rubber that shrinks at room temperature and has excellent stretch properties. In this embodiment, since it is also assumed that it is used in an environment that is always immersed in water, the material of the elastic tubular member 3B is ethylene propylene rubber (EPDM) excellent in waterproofness, moisture permeability, and weather resistance. Used. Here, the water vapor permeability 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 room temperature and has excellent stretch properties, and may be, for example, silicone rubber or natural rubber.

  The intermediate layer 8B includes 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, both the first layer 5B and the second layer 6B are 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 extends 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 first layer 5B and the second layer 6B have substantially the same edge in the axis L direction. 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. Thereby, the intermediate layer 8B is entirely covered with the elastic tubular member 3B without protruding outside the elastic tubular member 3B. Further, the inner peripheral surfaces of both end portions of the elastic tubular member 3 </ b> B are in contact with the outer peripheral surface of the core member 2.

The material of the first layer 5B is, for example, a composite synthetic rubber material using, for example, silicone rubber, acrylic rubber, butyl rubber, ethylene propylene rubber, nitrile rubber, hydrin rubber, and the like, similar to the first layer 5 of the first embodiment. Can be used. Thereby, it is waterproof, can be easily released from the core member 2, and a fluid layer can be formed. Further, the water vapor permeability 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. As a value indicating the fluidity of the material forming the first layer 5B, 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. is adopted. Sufficient shape followability can be ensured. Moreover, as a value which shows the ease of mold release with respect to the core member 2 of the material which forms the 1st layer 5B, the material whose peeling force (force required for peeling) with respect to polyethylene and polypropylene is 1-8 N / cm, for example. By adopting, workability at the time of covering can be secured. 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 is easier to peel from the core member 2 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 fluid material used as the second layer 6B does not need to take into account the ease with which the core member 2 is released, and there is no restriction on the degree of adhesion. Therefore, a material that is difficult to be used as the first layer 5B and has a high degree of adhesion and is difficult to release (for example, a peeling force of 10 N / cm or more) can be used as the second layer 6B. As a value indicating the fluidity of the material forming 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. . 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. Moreover, although the thickness of the 2nd layer 6B is about 0.4 mm-2.0 mm, for example, it is not limited to this.

The intermediate layer 8B is configured by laminating a first layer 5B and a second layer 6B. Therefore, the water vapor permeability of the intermediate layer 8B is a smaller value than the smaller one of the water vapor permeability of the first layer 5B or the second layer 6B. 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 may be 10 g / m ² · 24 h or less, or 5 g / m ² · 24 h or less. It may be.

  Next, functions and effects of the covering processing tool according to the present embodiment will be described.

  The covering processing tool 1B having the above-described configuration covers the connection portion between the cables 10B. In the state where the cables 10B are connected by the sleeve 13B, the core ribbon 2b of the covering processing tool 1B through which the cable 10B is inserted is pulled out, so that the connecting portion of 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 pressing the cable 10B side against the first layer 5B and the second layer 6B is applied, and the first layer 5B released from the core member 2 is applied. The second layer 6B is deformed following the shape of the cable 10B located inside. At this time, even if the cable 10B is scratched, the first layer 5B is deformed so as to fill the scratch. Thereby, the 1st layer 5B and the 2nd layer 6B can coat | cover the periphery of the connection part of cable 10B satisfactorily without gap, and can be provided with waterproofness. 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.

  Conventionally, a resin construction method has been used in an environment where the water is always immersed in water. In this construction method, a plastic mold case is put around the connection portion of the cable 10B, and a two-part room temperature curing resin made of, for example, an epoxy resin and a urethane resin is injected into the mold case to cure the resin. By doing so, the connecting portion of the cable 10B is covered. In such a resin construction method, it was necessary to wait for the resin to harden, and it took a long time to work. Moreover, when not using the resin construction method, after covering the periphery of the connection part of the cable 10B with a waterproof tape in advance, it may be covered with a covering member. In this embodiment, the covering of the cable 10B connecting portion is completed by pulling out the core member 2. Therefore, no member (waterproof tape or the like) other than the covering treatment tool 1B is necessary, and the time required for curing the resin is unnecessary, so that the operation is simple and the operation time is shortened.

  Further, the first layer 5B has a property that it is 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 that it is difficult to peel off from the core member 2, the second layer 6B does not come into direct contact with the core member 2, and therefore can be suitably used.

  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 than the first layer 5B can be used as the second layer 6B. Compared with the composite synthetic rubber material containing silicone rubber, the water vapor permeability of the intermediate layer 8B can be reduced by using a composite synthetic rubber material containing butyl rubber having a low water vapor permeability. Thereby, covering treatment tool 1B can be provided with not only waterproofness but also rust prevention.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, another elastic tubular member 3C may be attached to the outer periphery of the elastic tubular member 3B as in the covering processing tool 1C shown in FIG. 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. By setting it as such a structure, the intensity | strength of the outer-layer part of 1 C of coating processing tools can be raised. The strength may be further increased 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]
The test for confirming waterproofness was done using the coating processing tool formed based on 2nd Embodiment. The power cable connected by the sleeve was covered with a covering treatment tool, a voltage of 1 kV was applied in a water tank having a water temperature of 40 ° C. and a water depth of 1 m, and the insulation resistance was measured after 3000 hours. The test was performed with two types of power cables, a damaged power cable reaching the insulator and a non-scratched power cable.

Ethylene propylene rubber is used as the elastic tubular member, 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. A composite synthetic rubber material used having a thickness of 0.5 mm was used. Prior to the test, when the water vapor permeability (moisture permeability) was measured using a cup method according to JIS Z0208, the water vapor permeability of the ethylene propylene rubber forming the elastic tubular member was 2.0 g / m ² · 24 h. Yes, the water vapor permeability of the composite synthetic rubber material containing the silicone rubber forming the first layer is 50 g / m ² · 24 h, and the water vapor permeation of the composite synthetic rubber material using the 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 lapse of 3000 hours was 2000 MΩ or more in any of the cable with a flaw and the cable without a flaw, and no abnormality was recognized.

  DESCRIPTION OF SYMBOLS 1,1B ... Cover processing tool, 2 ... Core member (diameter expansion holding member), 3, 3B, 3C ... Elastic tubular member, 5, 5B ... 1st layer, 6, 6B ... 2nd layer, 7 ... 1st 3 layers, 8, 8B, 9 ... intermediate layer, 10, 10B ... cable, 12 ... connector.

Claims (9)

A hollow hollow expandable holding member that can be pulled out, an elastic tubular member that is held in an expanded state on the outer peripheral side of the expanded diameter holding member, and held between the expanded diameter holding member and the elastic tubular member. An intermediate layer,
The elastic tubular member contracts by pulling out the expanded diameter holding member, and a covering treatment tool that covers a cable and / or a connector by the contracted elastic tubular member,
The said intermediate | middle layer is a coating processing tool which has the 1st layer which has fluidity | liquidity, and the 2nd layer formed in the further outer peripheral side of the said 1st layer. The said intermediate | middle layer is a coating processing tool of Claim 1 which has a water-vapor permeability of 20 g / m < ² > * 24h or less.   The coating processing tool according to claim 1, wherein the second layer is formed of a sheet.   The coating processing tool according to claim 3, wherein the sheet includes a resin layer.   The coating processing tool according to claim 3 or 4, wherein the sheet includes a metal layer.   The said 2nd layer is a coating processing tool of Claim 1 or 2 formed of the member which has fluidity | liquidity.   The said intermediate | middle layer is a coating processing tool as described in any one of Claims 3-5 further equipped with the 3rd layer which has fluidity | liquidity on the outer peripheral side of the said 2nd layer.   The coating processing tool according to claim 6, wherein the first layer is more easily separated from the expanded diameter holding member than the second layer. The coating processing tool according to claim 6 or 8, 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.

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