JP3895682B2 - Impermeable tube - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water shielding tube used for a connection portion of a power cable or a communication cable or a connection portion of a pipe.
[0002]
[Prior art]
Conventionally, for example, as a means for water-shielding a cable connection part, a cylindrical metal shape is formed so that both side edges overlap a thin metal foil in which a rubber or plastic film is laminated inside a heat-shrinkable rubber or plastic tube layer. A water shielding layer formed by fusing the overlap portion and having a built-in structure is used, and a water shielding tube provided on the cable connection portion is used (see Patent Document 1).
[0003]
In addition, a ground wire is wound on the insulation reinforcement body of the cable connection part, and a thin metal foil in which rubber or plastic film is laminated on the insulation reinforcement body and the ground wire is cylindrical so that both side edges overlap. Also used is a water shielding tube in which a water-shrink layer is formed by fusing or adhering the overlap part, and a heat-shrinkable tube layer is provided on this water-shield layer so as to straddle the cable sheath (See Patent Document 2).
[0004]
Furthermore, as other water-impervious tubes, a dismantleable cylindrical core, a cold-shrinkable tube layer supported in an elastically expanded state outward from the cylindrical core, and a metal foil in the circumferential direction It is formed by overlapping the opposite side edges of each other, and is attached to the inner and outer peripheral surfaces of the water shielding layer interposed between the cylindrical core and the room temperature shrinkable tube layer, and the water shielding layer. And a pressure-sensitive adhesive layer that adheres the water-impervious layer and the cold-shrinkable tube layer is known (see Patent Document 3).
[0005]
[Patent Document 1]
JP 58-29659 A (claims, page 2, upper left column P7-19, lower left column P4-19, FIG. 1)
[Patent Document 2]
JP 57-156614 A (2nd page, upper left column P5-20, upper right column P1-8, drawing)
[Patent Document 3]
Japanese Patent Laid-Open No. 2001-231150 (Summary Solution and FIG. 1)
[0006]
[Problems to be solved by the invention]
The water shielding tube having the heat-shrinkable tube layer shown in Patent Documents 1 and 2 has a large number of processes because a thin metal foil in which a rubber or plastic film is laminated is embedded in the heat-shrinkable tube layer. There is a problem that the cost is increased and the productivity is lowered.
[0007]
Moreover, when attaching to a cable connection part etc., it is necessary to heat-shrink a heat shrinkable tube layer, and a heating tool is required. For this reason, it is difficult to use it in a place where use of fire or a power source is restricted or a narrow place. In addition, when the outer diameter of the water-blocking protection target object such as a connection part or a pipe is large, it takes time to shrink the heat-shrinkable tube layer, and the workability is lowered. Furthermore, since it is not easy to heat the heat-shrinkable tube layer, the shrinkage start time and shrinkage speed of the tube tend to be uneven at the circumferential position. For this reason, the metal foil is locally stretched and cracked, or conversely, the metal foil is wrinkled, resulting in poor adhesion to the object of water shielding protection, and the water shielding protection function of the water shielding tube is lowered. There is a fear.
[0008]
Since the water shielding tube shown in Patent Document 3 uses a room temperature shrinkable tube layer instead of the heat shrinkable tube layer, the problem due to the use of the heat shrinkable tube layer is roughly solved. On the other hand, if the pressure-sensitive adhesive layer is too strong, the uniform shrinkage of the water shielding layer is inhibited, and the adhesion to the water shielding protection object is deteriorated, so that the water shielding protection function may be lowered as described above.
[0009]
A water shielding tube composed only of a thin metal foil laminated with a rubber or plastic film without using the heat shrinkable tube layer or the room temperature shrinkable tube layer is also conceivable, but it is difficult to handle due to its low mechanical strength. Moreover, when attaching to a water-blocking protection target object, there exists a possibility that metal foil may contact and damage the edge, convex part, uneven surface, etc. of this target object. Further, when the water shielding tube is bent, there is a problem that wrinkles are generated unevenly and the adhesion to the water shielding protection object is lowered, and it is difficult to use it stably for a long time.
[0010]
The present invention solves the above problems and provides a water shielding tube that can be used in places where the use of fire or power supply is restricted or in a narrow place, and has good workability and excellent water shielding protection function. The purpose is to do.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a water shielding tube according to claim 1 of the present invention is formed by forming a metal foil laminated with a rubber or plastic film into a cylindrical shape so that both side edges overlap each other. In a water shielding tube having a water shielding layer formed by fusing or bonding a wrap portion, a non-permeable cushion layer is laminated on the inner surface of the water shielding layer, and on the inner surface of the cushion layer at the end of the water shielding tube. An adhesive seal layer is provided.
[0012]
According to such a configuration, since there is no heat shrinkable tube layer, a heat source is not required, and it can be used in a place where use of fire or a power source is restricted or in a narrow place where there is no space for installing a heat source. Workability is good.
[0013]
Further, since the cushion layer of the water shielding tube is impermeable, airtight and liquid tight, and becomes a reinforcing material that mechanically supports the water shielding layer, the mechanical strength is increased and handling is facilitated. In addition, when attached to a water-blocking protection object, the metal foil of the water-blocking layer comes into direct contact with the edges, protrusions, uneven surfaces, etc. of the object through the cushion layer, so that the metal foil may be damaged. Disappears. Furthermore, even if the water shielding layer of the water shielding tube is bent or contracted, and the metal foil is wrinkled, the portion other than the end of the cushion layer is not fixed with the adhesive seal layer, Dispersed due to stickiness (slidability) and flexibility, resulting in relatively uniform wrinkles, improved adhesion to water-blocking protection objects, improved water-blocking function and stable water-blocking tube for a long time Can be used.
[0014]
Furthermore, since the adhesive seal layer is provided on the inner surface of the cushion layer at the end portion, the same water shielding function as that when the heat shrinkable tube layer is used can be obtained.
[0015]
The water shielding tube described in claim 2 of the present invention is characterized in that in the one described in claim 1, the cushion layer is made of an olefin-based foam material.
[0016]
According to such a configuration, since the melting temperature of the olefin-based foamed material is close to the melting temperature of the rubber or plastic film laminated on the metal foil, it is possible to reliably fuse the both sides of the metal foil by overlapping. This makes it easy to form a water shielding layer.
[0017]
The water-blocking tube according to claim 3 of the present invention is the tube according to claim 1 or 2, wherein the end portion of the water-blocking layer in which the cushion layer is laminated on the inner surface is folded outward, and the adhesive seal layer is It is located outside the water shielding layer.
[0018]
According to such a configuration, when the water shielding tube is attached to the water shielding protection target object, there is no fear that the adhesive seal layer sticks to the outer surface of the water shielding protection target object, and the water shielding tube is fixed to the water shielding protection target object. It can arrange | position smoothly in a position and the attachment property of a water shielding tube improves.
[0019]
According to a fourth aspect of the present invention, there is provided the water shielding tube according to the first or second aspect, wherein a water shielding layer in which a cushion layer is laminated on the inner surface is provided on the outer periphery of the cylindrical diameter expanding core that can be disassembled. A room-temperature-shrinkable rubber that is wrapped and has a shorter length than the water-blocking layer so that it does not cover the adhesive seal layer on the outer periphery of the water-blocking layer and has an inner diameter smaller than the outer diameter of the cylindrical expanded core The elastic tube is supported in an expanded state.
[0020]
According to such a configuration, when the impermeable tube is attached to the impermeable protection object, the impermeable layer is shrunk inward by the room temperature shrinkable rubber elastic tube provided on the outer periphery of the impermeable layer. It becomes easy to make the tube adhere to the outer peripheral surface in accordance with the outer shape of the water-blocking protection object, and the water-blocking function can be further improved.
[0021]
The water-impervious tube according to claim 5 of the present invention is the water-impervious layer according to claim 1 or 2, wherein a cushion layer is laminated on the inner surface of the outer periphery of a cylindrical expanded core that can be disassembled. A room temperature shrinkable rubber elastic tube having an inner diameter smaller than the outer diameter of the cylindrical expanded core is supported in an expanded state on the outer periphery of the water shielding layer, and the water shielding layer is supported by the rubber elastic tube. The adhesive seal layer is located outside the water-impervious layer, extending from the end and folded back outside the rubber elastic tube.
[0022]
According to such a configuration, when attaching a water shielding tube having a room temperature shrinkable rubber elastic tube to a water shielding protection object, there is no fear that the adhesive seal layer sticks to the outer surface of the water shielding protection object. A tube can be smoothly arrange | positioned in the predetermined position of a water-blocking protection target object, and the attachment property of a water-blocking tube improves.
[0023]
According to a sixth aspect of the present invention, there is provided the water shielding tube according to any one of the first to fifth aspects, wherein at least one end of the water shielding layer having a cushion layer laminated on the inner surface has a plurality of ends. It is characterized by being branched into a cylindrical shape.
[0024]
According to such a configuration, a water shielding tube is attached to an object having a water shielding property which is not a straight shape, and has a different shape such as a cable connection portion branched into Y, T type, etc. Thus, the object can be reliably and easily protected against water.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing a first embodiment of a water shielding tube 10 of the present invention, and FIG. 2 is a cross-sectional view taken along line XX in FIG. The water-impervious tube 10 of the present embodiment includes, for example, a cylindrical water-impervious layer 11 and at least one surface thereof, in the illustrated case, a non-permeable cushion layer 13 laminated on the inner surface of the water-impervious layer 11. The adhesive seal layer 15 provided on the inner surface of the cushion layer 13 at both ends of the tube 10 is formed so that the inner diameter thereof is slightly larger than the outer diameter of the water-blocking protection object.
[0026]
More specifically, the water shielding layer 11 is formed of polyethylene, conductive polyethylene, ethylene vinyl acetate copolymer (EVA), polypropylene on both sides of a thin metal foil such as lead or aluminum (including these alloys). , A rubber or plastic film such as chloroprene rubber laminated to a total thickness of 10 to 100 μm is formed in a cylindrical shape so that both side edges overlap, and the overlap portion is fused or bonded It is made. The cushion layer 13 laminated on the inner surface of the water-impervious layer 11 is made of an olefin-based foam material such as cross-linked foamed polyethylene that is rich in impermeability, non-adhesiveness and flexibility. The adhesive seal layer 15 is made of a rubber-based adhesive material such as butyl rubber or acrylic rubber, or a resin-based adhesive material such as polyvinyl acetate.
[0027]
Before forming the metal foil laminated with the rubber or plastic film into a cylindrical shape, the cushion layer 13 is laminated in advance on one surface (inner surface) of the metal foil, and the adhesive seal layer 15 is the water shielding tube of the cushion layer 13. It is provided on the inner surface at the end by coating or pasting. When the cushion layer 13 is made of an olefinic foam material, the melting temperature of the olefinic foam material is close to the melting temperature of the rubber or plastic film laminated on the metal foil. Therefore, it is easy to form the water shielding layer 11.
[0028]
The water shielding tube 10 of the first embodiment is configured as described above. According to this water shielding tube 10, since it does not have a heat-shrinkable tube layer, it does not require a heat source and can be used in places where the use of fire or a power source is restricted or in a narrow place where there is no space for installing a heat source. Therefore, workability is good. In addition, the cushion layer 13 of the water shielding tube 10 is impermeable, airtight and liquid tight, and becomes a reinforcing material that mechanically supports the water shielding layer 11, so that the mechanical strength is increased and handling is easy. Become. Furthermore, since the adhesive seal layer 15 is provided on the inner surface of the cushion layer 13 at the end portion, the same water shielding function as when the heat shrinkable tube layer is used can be obtained.
[0029]
Next, a method for protecting the water shielding by covering the water shielding tube 10 on the cable connection portion 17 which is a water shielding protection object will be described. First, before assembling the cable connecting portion 17, the water shielding tube 10, the insulation reinforcing cylinder, the grounding shield mesh, the protective tube, and the like are temporarily inserted into one of the left and right cables 17 a and 17 b.
[0030]
Next, the conductors of both cables 17a and 17b are connected to each other by a compression sleeve and a male and female terminal insertion type to provide a conductor connection portion, and the insulation reinforcing cylinder temporarily inserted into one cable 17a and 17b is placed on the conductor connection portion. The linear cable connection part 17 is assembled by mounting by a plug-in type (prefabricated type) or a cold shrink type.
[0031]
Next, the ground shield mesh temporarily inserted into one of the cables 17a and 17b is moved and mounted on the cable connecting portion 17, and the ground wire 19 and the shield wire 17c of the cables 17a and 17b are soldered. Connect with the appropriate method.
[0032]
Next, as shown in FIG. 3, a rubber-based adhesive tape is wound around the outer periphery of the sheath where the ends of the water-impervious tube 10 of the cables 17a and 17b are located to provide an adhesive tape winding layer 21. . Thereafter, the water shielding tube 10 temporarily inserted in one of the cables 17a and 17b is moved and positioned on the cable connecting portion 17, and the adhesive sealing layer 15 of the water shielding tube 10 and the adhesive tape winding layer 21 on the cable side are arranged. Adhesive seal. In this way, as shown in FIG. 3, the water shielding tube 10 is attached to the outer periphery of the cable connecting portion 17, and the water shielding treatment of the cable connecting portion 17 is finished.
[0033]
As described above, when the water shielding tube 10 is attached to the cable connecting portion 17, the metal foil of the water shielding layer 11 is in direct contact with the edge, the convex portion, the uneven surface, or the like of the cable connecting portion 17 through the cushion layer 13. Therefore, there is no possibility of damaging the metal foil. Further, even if the water shielding layer 11 of the water shielding tube 10 is bent or contracted, and the metal foil is wrinkled, the portion excluding the end of the cushion layer is not fixed by the adhesive seal layer 15. In addition, it is dispersed by non-adhesiveness and flexibility and becomes a relatively uniform wrinkle, improving the adhesion with the cable connecting portion 17 and improving the water shielding function, so that the water shielding tube 10 can be used stably for a long period of time. can do.
[0034]
The water shielding tube of the present invention can be variously modified in addition to the water shielding tube 10. For example, what is shown in FIG. 4 is the water shielding tube 23 of 2nd Embodiment of this invention. In addition, the same code | symbol is attached | subjected to the thing of the same structure as the water shielding tube 10. FIG.
[0035]
The water shielding tube 23 is configured such that both end portions of the water shielding layer 11 having the cushion layer 13 laminated on the inner surface are folded outward and the adhesive seal layer 15 is located outside the water shielding layer 11. It is. Although the water shielding layer 11 is a thin-walled material, even if the water shielding layer 11 is folded back with a small bending radius, a pinhole or a crack does not occur in the folded portion due to the cushioning (buffering) action of the cushion layer 13. .
[0036]
When attaching the water shielding tube 23 to the water shielding protection object, after positioning the water shielding tube 23 at a predetermined mounting position of the water shielding protection object, the portions folded back outside the both ends of the water shielding layer 11 are arranged in the tube longitudinal direction. Then, the adhesive seal layer 15 is returned to the inside of the cushion layer 13 and adhesively sealed to the outer peripheral surface of the water-blocking protection target object. In order to smoothly move the folded portion of the water shielding layer 11, a grease-like lubricant such as silicon grease is previously interposed between the inner and outer peripheral surfaces of the folded portion of the water shielding layer 11. desirable.
[0037]
When such a water shielding tube 23 is used, there is no fear that the adhesive seal layer 15 sticks to the outer surface of the water shielding protection object when it is attached to the water shielding protection object. It can arrange | position smoothly to the predetermined position of a target object, and the attachment property of the water shielding tube 23 improves.
[0038]
What is shown in FIG. 5 is the water shielding tube 25 of 3rd Embodiment of this invention. The water shielding tube 25 includes a water shielding layer 11 in which a cushion layer 13 is laminated on the inner surface of an outer periphery of a cylindrical diameter expanding core 27 that can be disassembled, and an adhesive seal layer on the outer periphery of the water shielding layer 11. A room-temperature-shrinkable rubber elastic tube 29 having a shorter length than the water-impervious layer 11 and having an inner diameter smaller than the outer diameter of the cylindrical expanded core 27 is supported in an expanded state so as not to cover the outer surface 15. It is what.
[0039]
The cylindrical diameter-expanding core 27 is formed by, for example, forming a cylindrical cross-sectional string made of polypropylene into a spiral shape and joining the side surfaces of adjacent string-shaped bodies by welding or the like. For example, a string-like body that is formed in a cylindrical shape by fitting the side edges of the string-like body so as to be easily fitted is used. Therefore, by pulling the string-like body inward from one end side of the cylindrical enlarged core 27 and pulling it out through the cylindrical enlarged core 27 to the other end side, the cylindrical enlarged core 27 is gradually disassembled from the one end side. The rubber elastic tube 29 can be reduced in diameter together with the water shielding layer 11 and the cushion layer 13.
[0040]
The rubber elastic tube 29 is mainly composed of rubber materials such as styrene butadiene rubber, chloroprene rubber, ethylene propylene rubber, and silicone rubber, and is blended with a vulcanizing agent, a filler, a softening material, an antioxidant and the like as required. It is formed by being formed into a cylindrical shape, and the cylindrical diameter-expanded core 27 is disassembled so that it contracts at a normal temperature and is reduced in diameter. Other configurations are the same as those of the water shielding tube 10. When attaching the water shielding tube 25 to the water shielding protection object, after positioning the water shielding tube 25 at a predetermined mounting position of the water shielding protection object, the cylindrical enlarged core 27 is gradually disassembled from one end side. The rubber elastic tube 29 is gradually contracted from one end side, and the diameter of the rubber elastic tube 29 is reduced together with the water shielding layer 11 and the cushion layer 13 to be attached to the water shielding protection object. The water shielding protection object is protected against water by the adhesive action of 15.
[0041]
When such a water shielding tube 25 is used, when the water shielding tube is attached to a water shielding protection object, the water shielding layer 11 is inwardly formed by a room temperature shrinkable rubber elastic tube 29 provided on the outer periphery of the water shielding layer 11. Therefore, the water shielding tube 25 can be easily brought into close contact with the outer peripheral surface of the water shielding protection object in accordance with the outer shape of the water shielding protection target, and the water shielding function can be further improved.
[0042]
What is shown in FIG. 6 is the water shielding tube 31 of 4th Embodiment of this invention. The water shielding tube 31 includes a water shielding layer 11 in which a cushion layer 13 is laminated on the inner surface of an outer periphery of a cylindrical diameter expanding core 27 that can be disassembled. A cold-shrinkable rubber elastic tube 29 having an inner diameter smaller than the outer diameter of the diameter core 27 is supported in an expanded state, and the water shielding layer 11 extends from both ends of the rubber elastic tube 29. The adhesive seal layer 15 is configured to be folded outward and located outside the water shielding layer 11, and the other configuration is the same as that of the water shielding tube 25.
[0043]
When attaching the water shielding tube 31 to the water shielding protection object, after positioning the water shielding tube 31 at a predetermined mounting position of the water shielding protection object, the cylindrical enlarged core 27 is gradually disassembled from one end side. The rubber elastic tube 29 is gradually contracted from one end side, and the diameter is reduced together with the water shielding layer 11 and the cushion layer 13. At the same time, the portion folded back to the outside of the water shielding layer 11 located on the side where the cylindrical enlarged core 27 is disassembled is gradually slid outward along the longitudinal direction of the water shielding tube 31 and folded back. Then, the adhesive seal layer 15 is returned to the inside of the cushion layer 13 and adhesively sealed to the outer peripheral surface of the water-blocking protection target object. In this manner, the dismantling of the cylindrical enlarged core 27, the diameter reduction of the rubber elastic tube 29, and the return operation of the folded portion of the water shielding layer 11 are continued, and the water shielding tube 31 is attached to the water shielding protection object. The water shielding protection target is protected against water by the shrinking action of the rubber elastic tube 29 and the sticking action of the adhesive seal layer 15.
[0044]
When such a water shielding tube 31 is used, there is no fear that the adhesive seal layer 15 sticks to the outer surface of the water shielding protection object when it is attached to the water shielding protection object. It can arrange | position smoothly to the predetermined position of a target object, and the attachment property of the water shielding tube 31 improves.
[0045]
FIG. 7 shows a water shielding tube 33 according to a fifth embodiment of the present invention. The impermeable tube 33 has at least one end of the impermeable layer 11 having the cushion layer 13 laminated on the inner surface, for example, the right end is U-shaped (tuning fork or ten-handed shape) as illustrated. It branches into two cylinders and is formed into a Y shape as a whole. In addition, one end portion is branched into two cylinders so as to have a V shape, and is formed into a Y shape as a whole, or the branch angle that is branched into two cylinders is set to 90 degrees and the entire T It may be formed into a mold, one end may be branched into three or more cylinders, or not only one end but also both ends may be branched into a plurality of cylinders. Other structures can use the water shielding tubes 10, 23, 25, 31.
[0046]
When such a water shielding tube 33 is used, the water shielding protection object is not linear, Y, T type, etc. Even for an irregular shape such as a cable connecting portion branched into two, a water shielding tube 33 can be attached to the object so that the object can be reliably and easily protected against water.
[0047]
【The invention's effect】
As is apparent from the above description, according to the water shielding tube according to claim 1 of the present invention, the non-permeable cushion layer is laminated on the inner surface of the water shielding layer, and the inner surface of the cushion layer at the end of the water shielding tube. Since an adhesive seal layer is provided, it does not require a heat source, and it can be used in places where the use of fire or power is restricted or in a narrow place where there is no space to install a heat source, so workability is good. is there.
[0048]
Further, since the cushion layer of the water shielding tube is impermeable, airtight and liquid tight, and becomes a reinforcing material that mechanically supports the water shielding layer, the mechanical strength is increased and handling is facilitated. In addition, when attached to a water shielding object, the metal foil of the water shielding layer comes into direct contact with the edges, protrusions, uneven surfaces, etc. of the object through the cushion layer, which may damage the metal foil. Disappears. Furthermore, even if the water shielding layer of the water shielding tube is bent or contracted, and the metal foil is wrinkled, the portion other than the end of the cushion layer is not fixed with the adhesive seal layer, Dispersed due to adhesiveness and flexibility, resulting in relatively uniform wrinkles, improved adhesion to water-blocking protection objects, improved water-blocking function, and stable use of water-blocking tubes for a long period of time it can.
[0049]
Furthermore, since the adhesive seal layer is provided on the inner surface of the cushion layer at the end portion, the same water shielding function as that when the heat shrinkable tube layer is used can be obtained.
[0050]
According to the water shielding tube described in claim 2 of the present invention, since the cushion layer is made of an olefinic foam material, the melting temperature of the olefinic foam material is close to the melting temperature of the rubber or plastic film laminated on the metal foil. Therefore, both side edges of the metal foil can be overlapped and reliably bonded, and the formation of the water shielding layer is facilitated.
[0051]
According to the water shielding tube described in claim 3 of the present invention, the end portion of the water shielding layer having the cushion layer laminated on the inner surface is folded outward, and the adhesive seal layer is positioned outside the water shielding layer. When attaching a water-blocking tube to a water-blocking protection target object, there is no risk that the adhesive seal layer will stick to the outer surface of the water-blocking protection target object, and the water-blocking tube is smoothly placed in place on the water-blocking protection target object It is possible to improve the mountability of the water shielding tube.
[0052]
According to the water-impervious tube described in claim 4 of the present invention, a water-impervious layer in which a cushion layer is laminated on the inner surface is encapsulated on the outer periphery of a cylindrical diameter-expandable core that can be disassembled, and the outer periphery of the water-impervious layer In addition, a room-temperature-shrinkable rubber elastic tube that is shorter than the water-impervious layer and has an inner diameter smaller than the outer diameter of the cylindrical expanded core is supported in an expanded state so as not to cover the adhesive seal layer. Therefore, when attaching the impermeable tube to the impermeable protection object, the impermeable layer is shrunk inward by a room temperature shrinkable rubber elastic tube provided on the outer periphery of the impermeable layer. It becomes easy to make it adhere to the outer peripheral surface according to the outer shape of the water-blocking protection object, and the water-blocking function can be further improved.
[0053]
According to the water-impervious tube described in claim 5 of the present invention, the outer periphery of the cylindrical expanded core that can be disassembled is encapsulated with the water-impervious layer having the cushion layer laminated on the inner surface. Further, a cold-shrinkable rubber elastic tube having an inner diameter smaller than the outer diameter of the cylindrical expanded core is supported in an expanded state, and the water shielding layer is extended from the end of the rubber elastic tube. Since the adhesive seal layer is folded outside and located outside the impermeable layer, when attaching the impermeable tube with a room temperature shrinkable rubber elastic tube to the impermeable protection object, the adhesive seal layer is the impermeable protection target. There is no fear of sticking to the outer surface of the object, and the water shielding tube can be smoothly arranged at a predetermined position of the water shielding protection object, so that the mounting property of the water shielding tube is improved.
[0054]
According to the impermeable tube described in claim 6 of the present invention, at least one end of the impermeable layer having a cushion layer laminated on the inner surface is branched into a plurality of cylindrical shapes. Even if the shape of the cable is not a straight line, but has a different shape such as a cable connection part branched into Y, T, etc., a water shielding tube can be attached to this to ensure that the object is protected against water easily. can do.
[Brief description of the drawings]
FIG. 1 is a side view showing a first embodiment of a water shielding tube of the present invention.
2 is a cross-sectional view taken along line X-X in FIG. 1;
FIG. 3 is a longitudinal sectional view showing a usage state of the water shielding tube of FIGS.
FIG. 4 is a longitudinal sectional view of an upper half portion showing a second embodiment of the water shielding tube of the present invention.
FIG. 5 is an upper half vertical cross-sectional view showing a third embodiment of the water shielding tube of the present invention.
FIG. 6 is an upper half longitudinal sectional view showing a fourth embodiment of the water-impervious tube of the present invention.
FIG. 7 is a left slope view showing a fifth embodiment of the water shielding tube of the present invention.
[Explanation of symbols]
10 Water shielding tube
11 Water shielding layer
13 Cushion layer
15 Adhesive seal layer
17 Cable connection
17a cable
17b cable
17c Shielding wire
19 Grounding wire
21 Rubber adhesive tape
23 Impermeable tube
25 Water shielding tube
27 cylindrical expanded core
29 Rubber elastic tube
31 Water shielding tube
33 Water shielding tube

Claims (6)

A water shielding tube having a water shielding layer formed by forming a metal foil laminated with a rubber or plastic film into a cylindrical shape so that both side edges overlap, and fusing or bonding the overlapped portion. A water shielding tube, wherein an impermeable cushion layer is laminated on an inner surface of a water layer, and an adhesive seal layer is provided on an inner surface of the cushion layer at an end of the water shielding tube. The water shielding tube according to claim 1, wherein the cushion layer is made of an olefin-based foam material. 3. The water shielding tube according to claim 1, wherein an end portion of the water shielding layer having a cushion layer laminated on the inner surface is folded outward, and the adhesive seal layer is positioned outside the water shielding layer. A water shielding layer with a cushion layer laminated on the inner surface is encapsulated on the outer periphery of a cylindrical diameter expanding core that can be dismantled, and the water shielding layer does not cover the outer periphery of the water shielding layer on the adhesive seal layer. The water-impervious structure according to claim 1 or 2, wherein a cold-shrinkable rubber elastic tube having a shorter length than the outer diameter of the cylindrical expanded core is supported in an expanded state. tube. A water shielding layer with a cushion layer laminated on the inner surface is encapsulated on the outer periphery of the cylindrical diameter expanding core that can be disassembled, and the outer diameter of the water shielding layer is a room temperature having an inner diameter smaller than the outer diameter of the cylindrical diameter expanding core A shrinkable rubber elastic tube is supported in an expanded state, the water shielding layer is extended from the end of the rubber elastic tube, folded back to the outside of the rubber elastic tube, and an adhesive seal layer is placed outside the water shielding layer. The water shielding tube according to claim 1, wherein the water shielding tube is located. The water shielding tube according to any one of claims 1 to 5, wherein at least one end of the water shielding layer having a cushion layer laminated on the inner surface is branched into a plurality of cylinders.

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