JP2003111261A - Conduit mouth sealing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conduit mouth sealing structure which allows maintaining a water sealed condition of a conduit mouth of a piping for a long period and allows an easy fixing work. SOLUTION: An electric wire/cable or the like is inserted through an inner supporting member 2 made of a water-swelling elastic material. After integrating and fitting the inner supporting member 2 inside an outer supporting member 1, the outer supporting member 1 is fitted into a conduit 200. Since the conduit mouth is closed by the outer supporting member 1 and the inner supporting member 2 by closely fitting a collar 12 to the end of the conduit 200, the conduit mouth can be surely sealed with a simple structure by surely press-fitting the outer supporting member 1 to the conduit mouth by transmitting a pressure which is generated by swelling of the inner supporting member 2 which contacts water; and by suppressing intrusion of water by tight-fitting to the electric wire/cable passing through an insertion hole 22 of the inner holding member 2 while holding it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit port sealing structure for stopping leakage of water at a conduit port of a pipe for wiring a communication cable or the like, and particularly excellent in water leakage prevention property and durability, and mounting / removing. The present invention relates to a conduit opening sealing structure that facilitates work.

[0002]

2. Description of the Related Art Hitherto, foamed urethane has been used to prevent water leakage at a conduit opening in underground piping for wiring communication cables and the like. In this case, the communication cable is installed in the pipe, and sponge is press-fitted into the gap between the communication cable and the pipe at both ends of the pipe. A method has been employed in which urethane foam is injected and sufficiently impregnated, and then integrally cooled with water or air together with a sponge to be solidified. In addition, as an example of a conventional conduit opening sealing structure, there is one disclosed in Japanese Patent Laid-Open No. 9-14517, which is shown in FIG. FIG. 10 is a sectional view of a conventional conduit opening sealing structure.

In FIG. 10, the conventional conduit opening sealing structure is formed by a plate-shaped body having an outer shape adapted to the inner surface of the conduit 200 connected to an underground box (not shown). It is formed of a pair of fixing plates 102 having an insertion hole 110 through which the communication cable 100 is inserted in the central portion and a plurality of fixing holes around the insertion hole 110, and a plate-shaped body having an outer shape that fits the inner surface of the conduit 200, The plate-shaped body has an insertion hole 110 through which the communication cable 100 is inserted, and a plurality of fixing holes around the insertion hole 110 in the plate-shaped body. A pair of movable plates 101, a pair of flexible members 105 respectively interposed between the fixed plate 102 and the movable plate 101 facing each other, and the fixed holes of the movable plate 101 and the fixed plate 102. , Fixed plate 102 and movable 101 is configured to include a clamp 103 assembled integrally.

As described above, two sets of the movable plate 101 and the fixed plate 102 are opposed to each other in the conduit 200, and the flexible members 105 are respectively interposed between the movable plate 101 and the fixed plate 102 to tighten them. Fixing plate 1 by tightening with tool 103
Since the movable plate 101 can be moved and adjusted with respect to 02, the flexible material 105 is pressed and bulged to be brought into close contact with the inner surface of the pipeline 200, and water enters the underground box from the pipeline 200. This can be reliably and simply prevented.

[0005]

[Problems to be Solved by the Invention] Since the water stoppage of the pipeline mouth in the conventional underground piping is performed as described above,
After the sponge is evenly attached around the communication cable etc. at the conduit openings at both ends, liquid urethane foam must be injected and impregnated between the sponges at both ends, which makes mounting work difficult. Had. Even after installation, there is a risk that the urethane foam will be decomposed and contracted due to the water entering from the conduit opening.If it contracts, a gap will be created between the communication cable and the inner wall of the conduit, and the underground box will be submerged due to water leakage. However, there was a problem that electric leakage and the like would also occur.

Further, since the urethane foam is hardened integrally with the sponge and fixed to the communication cable and the inner wall of the conduit, a gap is easily generated between the urethane foam and the urethane due to the vibration of the communication cable, which leads to water leakage. In addition to being dangerous, it is difficult to remove it when performing a new waterproofing work, and there is a problem that the work cannot be performed efficiently.
Further, the conduit opening sealing structure shown in FIG. 10 includes two movable plates 101 and two fixed plates 102, and a flexible member 105 is interposed between the movable plate 101 and the fixed plate 102.
3, the flexible member 10 between the movable plate 101 and the fixed plate 102.
Since 5 is fastened and fixed, there is a problem that the number of parts is large and the structure is complicated, and a device for filling the flexible material 105 is additionally required, so that the mounting work cannot be easily performed.

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a conduit port sealing structure which can maintain the water stop state of a conduit port of a pipe for a long period of time and can be easily mounted. To aim.

[0008]

A conduit opening sealing structure according to the present invention is fitted to an outer supporting member formed of a substantially annular body made of a predetermined elastic member and an inner peripheral side of the outer supporting member. An internal support member of a substantially plate-like body made of a water-swellable elastic material to be supported, and the external support member and an internal support at the end of a predetermined conduit in which a wire or cable is routed. In a conduit port sealing structure in which members are fitted in an integrated state to seal the conduit port in a watertight manner, the external support member has a flange portion formed on one axial side end of the substantially annular body and A groove portion that can be fitted to the outer edge portion of the inner supporting member is formed continuously in the inner circumference of the substantially annular body, and the inner supporting member has an insertion hole through which the electric wire / cable can be inserted. One or a plurality of holes are formed, and the electric wire / cable is passed through the insertion hole. Part support member is fitted to the external support member, the integrated external support member and internal support member are fitted into the conduit opening, and the flange of the external support member is closely attached to the peripheral surface of the conduit opening. The road opening is closed by an external support member and an internal support member.

As described above, in the present invention, the electric wire, the cable, etc. are inserted through the inner supporting member made of the water-swelling elastic material,
After the inner support member is fitted inside the outer support member to be integrated with each other, the outer support member is fitted to the pipe line, and the flange portion is closely attached to the end of the pipe line to form the outer support member and the inner support member. By closing the conduit opening with a member, the pressure generated by the swelling of the internal supporting member in contact with water is transmitted to the external supporting member to securely crimp the external supporting member to the conduit opening, and the internal supporting member is passed through the insertion hole of the internal supporting member. The infiltration of water can be suppressed while closely adhering to and holding the electric wire / cable, and the conduit opening can be reliably sealed with a simple structure.

In addition, in the conduit opening sealing structure according to the present invention, the external support member is cut from the outer peripheral side to the inner peripheral side at one or a plurality of predetermined peripheral positions to be discontinuous in the circumferential direction, if necessary. It is what is done. Thus, in the present invention,
By cutting the outer supporting member from the outer peripheral side to the inner peripheral side at a predetermined peripheral position to make it discontinuous in the circumferential direction, and expanding the inner opening portion by expanding the cut portions so as to be separated from each other, it is possible to expand the inner supporting portion into the groove portion of the outer supporting member. There is no need to significantly deform the external support member or the internal support member with a strong force when fitting the internal support member, and the integration work of the external support member and the internal support member can be easily performed with a smaller force, Labor saving can be achieved.

Further, in the conduit opening sealing structure according to the present invention, the internal support member is divided into a plurality of circumferentially divided structures, and each of the divided divided bodies is made of water of different hardness. It is made of a swelling synthetic resin material. As described above, in the present invention, the internal support member has a plurality of divided structures, and the hardness of each divided body is made different so as to have an appropriate hardness according to each position in the circumferential direction, so that the electric wire / cable in the insertion hole is formed. And the like can be held in a more stable manner, and water can be prevented from entering through the insertion hole to reliably stop water at the conduit port.

Further, in the conduit opening sealing structure according to the present invention, if necessary, the inner support member is configured such that a portion positioned below the electric wire / cable is harder than an upper portion,
In addition to having a combined structure made of at least two materials, the bottom surface portion that comes into contact with the external support member is formed in a flat shape with a predetermined width. As described above, in the present invention, the inner support member is made of different materials in the upper and lower parts, and the lower portion is made harder, and the weight of the electric wire / cable is received at this portion, so that the internal weight due to the weight of the electric wire / cable is reduced. Excessive deformation of the support member can be avoided, and while maintaining close contact with the electric wires / cables, the weight of the electric wires / cables can be supported by appropriately distributing the weight to support heavy electric wires / cables. The wire / cable inside the insertion hole can be reliably stabilized and supported by being escaped to the external support member, water can be prevented from entering through the insertion hole, and water can be reliably stopped at the conduit opening.

Further, in the conduit opening sealing structure according to the present invention, if necessary, the void portion remaining in a state where the electric wire / cable is inserted into the insertion hole of the internal support member is substantially the same as the internal support member. A soft water-swellable elastic material filler is provided. Thus, in the present invention,
If a filler made of a water-swellable elastic material is placed in the void portion remaining in the insertion hole through which the electric wire / cable is inserted, and the filler comes into contact with water when fitted to the conduits of the external support member and the internal support member. By increasing the volume by swelling, the swelling of the internal support member causes the filling material to closely adhere to the wires / cables, filling the voids and sealing them. It is possible to prevent the intrusion of water from the pipe to make the water stop at the conduit opening more reliable.

Further, in the conduit opening sealing structure according to the present invention, the outer supporting member is made of a water-swellable elastic material at the outer peripheral portion facing the inner periphery of the conduit, while the other portion is formed, if necessary. Is made of a predetermined elastic material and has a combined structure made of at least two materials. As described above, in the present invention, the outer support member having a substantially annular body has a combined structure of the water-swellable elastic material and the predetermined elastic material, and when the outer support member comes into contact with water in the state of being fitted in the conduit, the outer peripheral portion of the outer support member. Swells to increase the volume, and together with the swelling of the inner support member, the outer support member closely adheres to the inner circumference of the conduit and fills the gap between the inner support member and the water, preventing water from entering. Water can be reliably stopped at the pipe port.

Further, in the conduit opening sealing structure according to the present invention, the outer supporting member is formed of a water-swelling elastic material which is harder than the inner supporting member, if necessary. As described above, in the present invention, the outer support member is made of a water-swelling synthetic resin material that is harder than the inner support member, and when the outer support member comes into contact with water, the outer support member also swells to increase its volume. It strongly adheres to the inner circumference of the channel and fills the gap with the channel, preventing water from entering and reliably stopping water at the channel opening, and an external support member that is harder than the internal support member The shape of the wire / cable can be maintained for a long period of time by maintaining its shape in the road.

Further, in the conduit opening sealing structure according to the present invention, the outer supporting member and / or the inner supporting member may be divided into a water-swellable elastic material portion and another elastic material portion, and a hardness of Different water-swellable elastic material parts are formed with different colors. As described above, in the present invention, the external support member and / or the internal support member are made to have different colors depending on the material and hardness thereof, and the members can be visually distinguished at the time of handling each member. Can be properly discriminated, the insertion of electric wires and cables into the internal support member and the fitting work of the internal support member to the external support member can be performed easily and without error, and the sealed state of the conduit opening can be ensured. You can

Further, in the conduit opening sealing structure according to the present invention, the external supporting member forms a concave portion at one or a plurality of predetermined locations between the flange portion and the inner peripheral surface at one end, if necessary. It is what is done. As described above, in the present invention, the concave portion is provided between the flange portion and the inner peripheral surface of the outer supporting member, and the outer supporting member and the inner supporting member in the used state can be held when they are removed from the conduit. By pulling the external support member in the direction to remove it from the conduit opening by sandwiching the recess and the inner peripheral surface with a predetermined device, the force to remove from the conduit opening can be efficiently transmitted to the external support member and external support. The member and the internal support member can be smoothly removed from the conduit opening, and the workability of removal can be improved.

Further, in the conduit opening sealing structure according to the present invention, the external supporting member is formed with an engaging portion for engaging with an outer edge portion of the conduit opening at an outer peripheral edge portion of the collar portion, if necessary. It is something. Thus, in the present invention, the flange portion of the external support member is provided with an engaging portion that engages with the outer edge of the conduit opening,
By engaging and integrating the flange portion with the conduit opening when the external support member is attached to the conduit opening, the adhesion between the conduit and the external support member is further enhanced, and the sealing performance of the conduit opening is improved. It can be further improved.

Further, in the conduit opening sealing structure according to the present invention, the outer supporting member is formed into a substantially conical surface at the outer peripheral portion facing the inside of the conduit, if necessary. As described above, in the present invention, the outer peripheral portion of the outer supporting member is formed into a substantially conical surface, and when the inner supporting member is swollen, the pressure force of the outer peripheral portion of the outer supporting member to the inner periphery of the conduit is moved from the conduit opening to the inner side. By weakening as much as possible, it is possible to suppress the friction between the outer peripheral portion of the external support member and the inner peripheral surface of the pipeline when the external support member is removed from the pipeline opening, and the external support member and the internal support member can be smoothly removed from the pipeline opening. , The efficiency of removal work is improved.

Further, in the conduit opening sealing structure according to the present invention, the outer peripheral portion of the inner supporting member facing the inner peripheral surface of the outer supporting member is formed into a substantially conical shape, if necessary. . As described above, in the present invention, the outer peripheral portion of the inner supporting member is formed into a substantially conical surface, and when the inner supporting member is swollen, the pressing force from the outer peripheral portion of the inner supporting member to the inner periphery of the conduit via the outer supporting member is applied. By weakening the outer support member from the conduit opening toward the inner side, it is possible to suppress the friction between the outer peripheral portion of the external support member and the inner peripheral surface of the conduit when the external support member is removed from the conduit opening, and the external support member and the internal support member are It can be removed smoothly from the roadway, improving the efficiency of removal work.

Further, in the conduit opening sealing structure according to the present invention, the external support member is provided at two predetermined positions sandwiching a cutting position cut from the outer peripheral side to the inner peripheral side at one axial end. The protrusions are formed so as to protrude in a convex shape. As described above, in the present invention, the protruding portion is disposed on one end side of the external support member with the cutting position interposed therebetween.
When removing the used external support member and internal support member from the conduit, pull out the external support member from the conduit opening by sandwiching the protruding part with a predetermined clampable device and pulling the external support member to the conduit opening. The force to be removed can be efficiently transmitted to the external support member, the external support member and the internal support member can be smoothly removed from the conduit opening, and the removal workability can be improved.

In addition, in the conduit opening sealing structure according to the present invention, the external supporting member and / or the internal supporting member are formed of a conductive material, if necessary, and a predetermined ground wire or grounded It is connected to a conductor and grounded. Thus, in the present invention, the external support member and / or
Alternatively, by making the internal support member a conductor and grounding it to make it electrically stable, it is possible to reduce the electrical influence from the outside when the covering material of the inserted wire / cable is made of metal. It can safely support electric wires and cables.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment of the Invention) A conduit opening sealing structure according to a first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. 1 is a cross-sectional view of the conduit opening sealing structure according to this embodiment, FIG. 2 is a front view of the conduit opening sealing structure according to this embodiment, and FIG. 3 is an external support in the conduit opening sealing structure according to this embodiment. It is a side view of a member. The conduit opening sealing structure according to the present embodiment in each of the drawings includes an external support member 1 formed of a substantially annular body made of an elastic material, and an internal support member 2 fitted and supported by the external support member 1. The external support member 1 in which the internal support member 2 is integrated is fitted into the opening of the conduit 200 attached to the underground box (not shown).

The external support member 1 is formed of a substantially annular body made of a synthetic resin material having elasticity, and the collar portion 1 is provided on one end side thereof.
2 is formed, and a groove portion 13 that is continuous over the entire circumference is formed in the inner peripheral portion. The outer peripheral portion of the external support member 1 facing the inside of the conduit 200 is formed in a substantially conical surface shape. Then, the external support member 1 is provided with a cutting portion 15 that cuts the annular body from the outer peripheral side including the collar portion 12 to the inner peripheral side at a predetermined position on the circumference to discontinue. In addition, an engaging portion 12a that engages with an outer edge portion of the opening of the conduit 200 is formed on an outer peripheral edge portion of the collar portion 12. When the external support member 1 is fitted into the conduit 200, the flange portion 12 comes into a state of being in close contact with the end surface of the conduit 200.

The inner support member 2 is composed of two split bodies 20 made of a water-swellable synthetic resin material having different elasticity and hardness.
It is formed of a substantially disc-shaped body in which a and 20b are combined, and is fitted and supported in the groove portion 13 of the external support member 1.
The internal support member 2 is provided with a communication cable 10 at a substantially central position.
The through hole 22 through which 0 can be inserted is formed in advance or at the time of construction, and the communication cable 100 is formed by the two divided bodies 20a and 20b.
Is sandwiched from above and below.

The bottom surface of the divided body 20a located below the communication cable 100 is formed into a flat surface having a predetermined width.
This is a configuration that ensures a sufficient contact surface with the external support member 1.
The lower divided body 20a is made harder than the upper divided body 20b, and the divided bodies 20a having different hardnesses,
The colors of 20b are different from each other. Since the divided bodies 20a and 20b in the internal support member 2 can be visually distinguished by different colors, the divided bodies 20a and 20b can be distinguished.
It is possible to properly discriminate the use place of, and each work such as fitting can be performed easily and without error.

Next, a process of forming the conduit opening sealing structure according to the present embodiment based on the above structure will be described. First, each of the divided bodies 20a and 20b forming the inner support member 2 is provided with a notch serving as an insertion hole 22 having a size corresponding to the communication cable 100. Each divided body 20 of this internal support member 2
The communication cable 100 is sandwiched between a and 20b, and the communication cable 100 is positioned in the insertion hole 22, that is, the internal support member 2 is attached to the outer periphery of the communication cable 100 so as to be able to move forward and backward. The cutting portion 15 of the outer supporting member 1 is expanded with respect to the inner supporting member 2 attached to the communication cable 100, and the inner supporting member 2 is housed in the groove 13 of the expanded outer supporting member 1. Attach to. After the inner support member 2 is housed in this way, the outer support member 1 is closed and the outer support member 1 and the inner support member 2 are integrated. The integrated external support member 1 and internal support member 2
Is slid along the communication cable 100, press-fitted into the conduit opening until the flange portion 12 and the peripheral edge surface of the opening of the conduit 200 come into contact, and the engaging portion 12a on the outer periphery of the flange portion 12 is connected to the conduit 20.
The attachment work is completed by engaging with the outer edge of the 0 opening.

In this way, the outer support member 1 and the inner support member 2 are connected to the inner peripheral surface of the conduit 200 and the communication cable 10, respectively.
Even when rainwater or the like is in close contact with the inside of the conduit 200 and enters the conduit 200 from the inside of the conduit to the outside of the conduit or from the outside of the conduit to the inside of the conduit 200, the inner support member 2 in contact with moisture has its water swelling property. Expands to reduce the size of the insertion hole 22 to improve the adhesion to the communication cable 100, prevent rainwater and the like from entering through the insertion hole 22, and remove the outer support member 1 from the inner peripheral side of the outer support member 1. The diameters of the outer support member 1 and the inner support member 2 as well as between the outer support member 1 and the inner wall of the conduit 200 are sealed to prevent infiltration of rainwater and the like. Further, the engaging portion 1 of the collar portion 12 of the external support member 1
Since 2a engages with the outer edge of the conduit opening, the adhesion between the external support member 1 and the conduit 200 is high, and the conduit opening can be reliably sealed against moisture.

On the other hand, when the outer support member 1 and the inner support member 2 in use are removed from the conduit 200, the outer peripheral surface of the outer support member 1 contacting the inner peripheral surface of the conduit 200 is formed into a substantially conical surface shape. Therefore, even after the inner support member 2 is in contact with water and expanded, the outer support member 1 in a state in which a tensile force is applied in the pipe extension direction to remove the outer support member 1
It is possible to reduce the friction between the inner peripheral surface of the pipe 200 and
Can be removed smoothly. As described above, the conduit opening sealing structure according to the present embodiment has the inner support member 2 made of the water-swellable elastic material.
After the communication cable 100 is inserted into the outer support member 1 and the inner support member 2 is fitted inside the outer support member 1 to be integrated, the outer support member 1 is fitted into the conduit 200, and the collar portion 12 is connected to the conduit 20.
Since the conduit opening is closed by the outer support member 1 and the inner support member 2 in close contact with the end portion of 0, the pressure generated by the swelling of the inner support member 2 in contact with water is transmitted to the outer support member 1. 1 can be securely pressure-bonded to the conduit opening, and the intrusion of water can be suppressed while closely adhering to and holding the communication cable 100 passing through the insertion hole 22 of the internal support member 2, and the conduit opening can be formed with a simple structure. Can be surely sealed. In addition, the internal support member 2 has an upper and lower two-divided structure, and the lower portion is made more rigid, and the weight of the communication cable 100 is received at this portion.
Since the internal support member 2 is prevented from being excessively deformed due to the weight of the communication cable 100, while maintaining close contact with the communication cable 100, the weight can be appropriately dispersed and supported corresponding to the heavy communication cable 100. The weight of the cable 100 is released to the external support member 1, and the communication cable 10 in the insertion hole 22
0 can be reliably stabilized and supported.

In the conduit opening sealing structure according to the above-mentioned embodiment, the outer peripheral portion of the outer supporting member 1 facing the inside of the conduit 200 is formed into a substantially conical surface so that the outer supporting member 1 can be easily removed. In addition to this, the internal support member 2 can also be configured such that the outer peripheral portion facing the inner peripheral surface of the external support member 1 is formed into a substantially conical surface shape. The support member 2 can be easily removed.

(Second Embodiment of the Present Invention) Second Embodiment of the Present Invention
The conduit opening sealing structure according to the embodiment will be described with reference to FIGS. 4 and 5. FIG. 4 is a sectional view of the conduit opening sealing structure according to the present embodiment, and FIG. 5 is a front view of the conduit opening sealing structure according to the present embodiment. The conduit opening sealing structure according to the present embodiment in each of the drawings is an external support member 1 formed of a substantially annular body made of a water-swellable elastic material, and a substantially plate fitted and supported by the external support member 1. As in the first embodiment, the outer support member 1 having the inner support member 2 integrated therein is fitted into the opening of the conduit 200.

The external support member 1 is formed of a substantially annular body made of a water-swelling synthetic resin material having elasticity, has a flange portion 12 formed at one end side, and has an inner peripheral portion over the entire circumference. A continuous groove portion 13 is formed, and a concave portion 16 is formed at a predetermined position between the flange portion 12 and the inner peripheral surface at one end. The external support member 1 is provided with a cutting portion 15 that cuts the annular body from the outer peripheral side including the flange portion 12 to the inner peripheral side at a predetermined position on the circumference to discontinue.
The inner support member 2 is formed of a substantially disk-shaped body made of a water-swelling synthetic resin material that is softer than the outer support member 1, and is inserted through a through hole 22 through which the communication cable 100 can be inserted into a predetermined position and an outer portion. The cutting portions 23 reaching the holes 22 are formed in advance or at the time of construction. The inner support member 2 is fitted and supported in the groove 13 of the outer support member 1. It should be noted that in the void portion at the center of the twisted wire remaining in a state where the twisted wire communication cable 100 is inserted into the insertion hole 22 of the inner support member 2, the water swelling property is as soft as the inner support member 2. A filling material 24 made of an elastic material is provided.

Next, the construction of the conduit opening sealing structure according to this embodiment based on the above construction will be described. First, an insertion hole 22 having a size corresponding to the thickness of the communication cable 100 is formed in the inner support member 2, and a predetermined portion of the inner support member 2 is cut from the outer peripheral side until the insertion hole 22 is reached and a cutting portion is cut. 23. The cutting portion 23 is formed in advance in the internal support member 2
It can also be formed by making a cut from the outer peripheral side to the substantially central portion. The internal support member 2 is cut into a cutting portion 23.
When the communication cable 100 is inserted into the insertion hole 22 through the cutting portion 23, the internal support member 2 is returned to the closed state, and the internal support member 2 is attached to the outer periphery of the communication cable 100 so as to be movable back and forth. .

The cut portion 15 of the outer supporting member 1 is expanded with respect to the inner supporting member 2 attached to the communication cable 100, and the inner supporting member 2 is placed in the groove 13 of the expanded outer supporting member 1. Attach it so that it will be stored. After the inner support member 2 is stored in this way, the outer support member 1 is returned to the closed state, and the outer support member 1 and the inner support member 2 are integrated. The integrated outer support member 1 and inner support member 2 are slid along the communication cable 100, press-fitted into the conduit opening until the flange portion 12 and the peripheral surface of the conduit opening of the conduit 200 come into contact with each other, and the insertion hole 22 is further inserted. The communication cable 100 at the insertion portion is filled with the filler 24 made of the water-swellable elastic material in the void portion remaining at the center of the twisted wire, and the attachment work is completed.

In this way, the outer support member 1 and the inner support member 2 are connected to the inner peripheral surface of the conduit 200 and the communication cable 10, respectively.
Even when rainwater or the like is in close contact with 0 and enters the pipe 200 from the pipe outside region to the pipe outside region or from the pipe outside region into the pipe 200, the external support member 1 and the internal support member 2 that come into contact with moisture Expands due to its water swelling property, and the soft inner support member 2 flexibly adapts to the complicated outer shape of the stranded communication cable 100 and adheres to the outer peripheral surface of the communication cable 100, so that rainwater or the like can penetrate through the insertion hole 22. In addition, the expansion of the outer support member 1 and the inner support member 2 surely seals between the outer support member 1 and the inner support member 2 and between the outer support member 1 and the inner wall of the conduit 200, respectively. As a condition, prevent intrusion of rainwater.

On the other hand, when the external support member 1 and the internal support member 2 in use are removed from the conduit 200, the recess 16 and the inner peripheral surface of the external support member 1 are clamped by a predetermined tool and pulled to the conduit opening. Then, the force to be removed is efficiently transmitted to the external support member 1, and the external support member 1 and the internal support member 2 can be smoothly removed from the conduit opening. As described above, in the conduit opening sealing structure according to the present embodiment, the outer support member 1 is formed of the water-swelling synthetic resin material that is harder than the inner support member 2, and the communication hole 100 is inserted into the insertion hole 22. A filler 24 made of a water-swellable elastic material is arranged in the remaining void portion,
When the outer support member 1 and the inner support member 2 are fitted in the conduit 200, when the outer support member 1 and the filler 24 come into contact with water, the outer support member 1 and the filler 24 increase in volume due to swelling. In addition to tightly adhering to the circumference to fill the gap between the pipe 200 and the pipe 200, the filling material 24 is added to the communication cable 100.
It will adhere tightly to and will fill the gap and seal it,
Water can be prevented from entering at each part, and water can be reliably stopped at the conduit port. In addition, the outer support member 1 that is harder than the inner support member 2 maintains its shape in the conduit 200 and maintains the communication cable 100.
The supporting state of can be maintained for a long time.

(Third Embodiment of the Present Invention) Third Embodiment of the Present Invention
The conduit opening sealing structure according to the embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a sectional view of the conduit opening sealing structure according to the present embodiment, and FIG. 7 is a front view of the conduit opening sealing structure according to the present embodiment. In each of the drawings, the conduit opening sealing structure according to the present embodiment has a configuration including an external support member 1 and an internal support member 2 as in the first embodiment. The difference is that the external support member 1 However, the outer peripheral portion 1a facing the inner periphery of the conduit 200 is made of a water-swellable elastic material, while the other portion is made of a predetermined elastic material, and has a structure of a combined structure made of two materials. Is.

The construction of the conduit opening sealing structure according to this embodiment is the same as that of the second embodiment, and a description thereof will be omitted. When the outer support member 1 and the inner support member 2 are in close contact with the inner peripheral surface of the pipeline 200 and the communication cable 100, respectively, rainwater from inside the pipeline 200 to outside the pipeline or from outside the pipeline to inside the pipeline 200 Etc. try to penetrate,
The outer peripheral portion 1a of the outer supporting member 1 and the inner supporting member 2 which are in contact with water expand due to the water swelling property, and the inner supporting member 2 is brought into close contact with the outer peripheral surface of the communication cable 100 corresponding to the outer shape of the communication cable 100 and is inserted. While preventing rainwater and the like from entering through the holes 22, the outer peripheral member 1a of the outer supporting member 1 and the inner supporting member 2 are respectively expanded to cause a space between the outer supporting member 1 and the inner supporting member 2 and between the outer supporting member 1 and the outer supporting member 1. Pipeline 200
It is possible to prevent the intrusion of rainwater etc. by ensuring a tightly sealed state with the inner wall.

In the conduit opening sealing structure according to the above-mentioned embodiment, one insertion hole 22 is formed in the internal support member 2 and the communication cable 100 to be inserted is one. Without being limited to this, as shown in FIG. 8, a plurality of insertion holes 22 may be provided in correspondence with the case where a plurality of communication cables 100 are passed through the internal support member 2.
Similarly to the above, the inner support member 2 in contact with water swells to be in close contact with each communication cable 100, thereby preventing rainwater and the like from entering.

Further, in the conduit opening sealing structure according to each of the first to third embodiments, one end side of the external support member 1 is configured to have a substantially planar shape including the flange portion 12. Not limited to this, as shown in FIG.
It is also possible to form a projecting portion 17 projecting in a convex shape at two positions sandwiching the cutting portion 15 on one end side of the pipe, and to connect the external supporting member 1 and the internal supporting member 2 in use to the conduit 20.
When removing from 0, if any of the protrusions 17 of the external support member 1 is clamped by a predetermined device and pulled to the conduit opening, the portion of the external support member 1 on the side closer to the clamped protrusion 17 is cut off. The external support member 1 and the internal support member 2 can efficiently transmit the force to remove the external support member 1 and the internal support member 2 as compared with the opposite side part sandwiching the external support member 1 and the internal support member 2. Can be removed smoothly. Further, the collar portion 12 of the external support member 1 is not limited to the circular shape, and the collar portion 12 shown in FIG.
As shown in, it is also possible to have a shape other than a circle, such as a substantially rectangular shape.

Further, in the conduit opening sealing structure according to each of the first to third embodiments, the outer supporting member 1 and the inner supporting member 2 are made of a predetermined elastic material. The outer supporting member 1 and / or the inner supporting member 2 is formed of a material having conductivity in addition to elasticity and water swelling property, and is connected to a predetermined ground wire or a grounded conductor such as a metal conduit 200. Alternatively, the outer support member 1 and / or the inner support member 2 may be made of a conductor and grounded to be in an electrically stable state. Therefore, the covering material of the inserted communication cable 100 may be made of metal. In some cases, the electrical influence from the outside can be reduced, and the communication cable 100
Can be safely supported.

[0042]

As described above, according to the present invention, an electric wire, a cable and the like are inserted through an inner supporting member made of a water-swelling elastic material, and the inner supporting member is fitted inside the outer supporting member to be integrated. Then, the external support member is fitted into the conduit, the flange portion is brought into close contact with the end of the conduit, and the conduit opening is closed by the external support member and the internal support member, so that the internal support member comes into contact with moisture. The pressure generated by the swelling is transmitted to the external support member so that the external support member is securely crimped to the conduit opening, and it also adheres to the electric wire / cable that has passed through the insertion hole of the internal support member and holds it to prevent the ingress of moisture. As a result, the effect is obtained that the conduit opening can be reliably sealed with a simple structure.

Further, according to the present invention, the outer support member is cut at a predetermined circumferential position from the outer peripheral side to the inner peripheral side to be discontinuous in the circumferential direction, and the cut portions are widened so as to be separated from each other to form the inner opening portion. Being expandable eliminates the need to greatly deform the external support member or the internal support member with a strong force when fitting the internal support member into the groove of the external support member,
The work of integrating the external support member and the internal support member can be easily performed with a smaller force, and the work can be saved.

Further, according to the present invention, the internal support member has a plurality of divided structures, and the hardness of each divided body is made different so as to have an appropriate hardness according to each position in the circumferential direction, whereby the inside of the insertion hole is It can hold electric wires, cables, etc. more stably and closely.
This has the effect of preventing water from entering through the insertion hole and reliably stopping water at the conduit opening.

Further, according to the present invention, the inner support member is made of different materials in the upper and lower portions, and the lower portion is made harder, and the weight of the electric wire / cable is received at this portion, thereby Excessive deformation of the internal support member due to weight can be avoided, and while maintaining close contact with electric wires / cables, the weight can be appropriately dispersed and supported in correspondence with heavy electric wires / cables. There is an effect that the weight of the above can be escaped to the external support member and the electric wire / cable in the insertion hole can be reliably stabilized and supported, the intrusion of water from the insertion hole can be prevented, and the water can be surely stopped at the conduit opening.

Further, according to the present invention, a filler made of a water-swellable elastic material is disposed in the void portion remaining in the insertion hole through which the electric wire / cable is inserted, and the external support member and the internal support member are connected to the conduits. When the filler comes into contact with water in the fitted state, the volume increases due to swelling, so that the filler strongly adheres to the wires / cables together with the swelling of the internal support member, filling the voids and sealing. -It has an effect that water can be prevented from entering through a void portion at the center of the twisted wire forming the cable and the water can be stopped more reliably at the conduit port.

Further, according to the present invention, the external support member of the annular body has a combined structure of a water-swellable elastic material and a predetermined elastic material, and when the external support member comes into contact with water in a fitted state in the conduit, As the outer peripheral part swells to increase the volume, the outer support member closely adheres to the inner circumference of the pipe along with the swelling of the inner support member and fills the gap between the pipe and the water intrusion. Therefore, there is an effect that water can be surely stopped at the conduit opening.

According to the present invention, the outer supporting member is made of a water-swelling synthetic resin material which is harder than the inner supporting member,
Upon contact with water, the external support member also swells and increases its volume, so that the external support member strongly adheres to the inner circumference of the pipe and fills the gap between the pipe and the pipe, blocking the intrusion of water and blocking the pipe. There is an effect that the water can be surely stopped at the passage opening, and the outer supporting member, which is harder than the inner supporting member, maintains the shape in the conduit and can maintain the supporting state of the electric wire / cable for a long time.

Further, according to the present invention, the external support member and / or the internal support member are made to have different colors depending on their materials and hardness, and the members can be visually distinguished when they are handled. You can properly determine where to use,
There is an effect that the electric wire / cable can be inserted into the inner support member and the work of fitting the inner support member to the outer support member can be performed easily and without error, and the sealed state of the conduit opening can be ensured. .

Further, according to the present invention, the concave portion is provided between the flange portion and the inner peripheral surface of the outer supporting member, and when the outer supporting member and the inner supporting member in the used state are removed from the conduit, The external support member can be efficiently transmitted to the external support member by pulling the external support member in the direction to remove it from the conduit opening by sandwiching the concave portion and the inner peripheral surface with a predetermined clampable device. The external support member and the internal support member can be smoothly removed from the conduit opening, and the workability of removal can be improved.

Further, according to the present invention, an engaging portion that engages with the outer edge portion of the conduit opening is provided in the flange portion of the external supporting member, and the flange portion is attached to the external supporting member when the external supporting member is attached to the conduit opening. By engaging with and integrating with, the adhesion between the conduit and the external support member is further enhanced, and there is an effect that the sealing performance of the conduit opening can be further improved.

Further, according to the present invention, the outer peripheral portion of the outer supporting member is formed into a substantially conical surface shape, and when the inner supporting member is swollen, the crimping force of the outer peripheral portion of the outer supporting member to the inner periphery of the conduit is exerted from the conduit opening. By weakening it toward the back, friction between the outer peripheral part of the external support member and the inner peripheral surface of the conduit when removing the external support member from the conduit opening can be suppressed, and the external support member and the internal support member can be smoothly moved from the conduit opening. It has the effect that it can be removed and the efficiency of the removal work is improved.

Further, according to the present invention, the outer peripheral portion of the inner support member is formed into a substantially conical surface shape, and when the inner support member swells, the outer peripheral portion of the inner support member extends to the inner periphery of the conduit through the outer support member. By weakening the pressing force from the conduit opening to the inner side, it is possible to suppress the friction between the outer peripheral part of the external supporting member and the inner peripheral surface of the conduit when the external supporting member is removed from the conduit opening. There is an effect that the member can be smoothly removed from the conduit opening, and the efficiency of the removing work is improved.

Further, according to the present invention, the protruding portion is disposed on one end side of the external supporting member with the cutting position interposed therebetween, and the external supporting member and the internal supporting member in the used state are clamped when they are removed from the conduit. By pulling the external support member in a direction to remove it from the conduit opening with the projecting portion sandwiched by a possible predetermined device, the force to remove from the conduit opening is efficiently transmitted to the external support member, and the external support member Also, the internal support member can be smoothly removed from the conduit opening, and the removal workability can be improved.

Further, according to the present invention, the outer supporting member and / or the inner supporting member is made of a conductor and grounded so as to be in an electrically stable state so that the inserted wire / cable covering material is When it is made of metal, it has an effect that the electric influence from the outside can be reduced and the electric wire / cable can be supported safely.

[Brief description of drawings]

FIG. 1 is a sectional view of a conduit port sealing structure according to a first embodiment of the present invention.

FIG. 2 is a front view of the conduit opening sealing structure according to the first embodiment of the present invention.

FIG. 3 is a side view of an external support member in the conduit opening sealing structure according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a conduit port sealing structure according to a second embodiment of the present invention.

FIG. 5 is a front view of a conduit port sealing structure according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a conduit port sealing structure according to a third embodiment of the present invention.

FIG. 7 is a front view of a conduit port sealing structure according to a third embodiment of the present invention.

FIG. 8 is a front view of a conduit port sealing structure according to another embodiment of the present invention.

FIG. 9 is a front view and a side view of a conduit opening sealing structure according to another embodiment of the present invention.

FIG. 10 is a cross-sectional view of a conventional conduit opening sealing structure.

[Explanation of symbols]

1 External support member 1a outer peripheral part 2 Internal support member 12 collar part 12a engaging part 13 groove 15 cutting part 16 recess 17 Projection 20a, 20b divided body 22 insertion hole 23 cutting part 24 Filling material 100 communication cable 101 movable plate 102 Fixed plate 103 Fastener 105 Flexible material 110 insertion hole 200 pipelines

Continued front page    F-term (reference) 3H025 DA01 DB22 DC01 DD01                 5G369 AA05 BA04 BA06 DC02 DC15                       DC17 DD02 EA01

Claims (14)

[Claims] 1. An outer support member formed of a substantially annular body made of a predetermined elastic member, and a predetermined plate-like body made of a water-swellable elastic material fitted and supported on the inner peripheral side of the outer support member. Of the internal support member, the electric wire / cable is fitted into the conduit opening at the end of a predetermined conduit in which the external support member and the internal support member are integrated, and the conduit opening is In a watertightly sealed duct opening structure, the external support member has a flange portion formed on one end side in the axial direction of the substantially annular body and is continuous in the circumferential direction on the inner circumference of the substantially annular body. A groove that can be fitted to the outer edge of the inner supporting member is formed, and the inner supporting member is provided with one or more insertion holes through which the electric wires and cables can be inserted, and the electric wires and cables are inserted into the insertion holes. The inner support member in the passed state is fitted to the outer support member, It is possible to fit the embodied external support member and internal support member to the conduit opening, and to close the conduit opening with the external supporting member and the internal supporting member in a state where the flange portion of the external supporting member is in close contact with the peripheral surface of the conduit opening. Characteristic pipe line sealing structure. 2. The conduit opening sealing structure according to claim 1, wherein the external support member is cut at one or a plurality of predetermined peripheral positions from the outer peripheral side to the inner peripheral side to be discontinuous in the circumferential direction. A conduit opening sealing structure characterized in that 3. The conduit opening sealing structure according to claim 1 or 2, wherein the internal support member has a plurality of divided structures in the circumferential direction, and each divided body has a different hardness. A conduit opening sealing structure characterized by being made of a water-swellable synthetic resin material. 4. The conduit opening sealing structure according to any one of claims 1 to 3, wherein the inner support member is configured such that a portion positioned below the electric wire / cable is harder than an upper portion thereof. The conduit opening sealing structure is characterized in that it is a combined structure made of at least two or more materials, and that a bottom surface portion that comes into contact with the external support member is formed in a flat shape having a predetermined width. 5. The conduit opening sealing structure according to any one of claims 1 to 4, wherein an internal support is provided in a void portion remaining in a state where the wire / cable is inserted into an insertion hole of the internal support member. A conduit opening sealing structure, characterized in that a filler made of a water-swellable elastic material having substantially the same softness as the member is provided. 6. The conduit opening sealing structure according to claim 1, wherein the outer support member has an outer peripheral portion facing the inner periphery of the conduit made of a water-swellable elastic material. On the other hand, the conduit opening sealing structure, characterized in that the other portion is made of a predetermined elastic material and has a combined structure made of at least two materials. 7. The conduit opening sealing structure according to claim 1, wherein the outer support member is formed of a water-swellable elastic material that is harder than the inner support member. A conduit opening sealing structure. 8. The conduit opening sealing structure according to claim 1, wherein the outer support member and / or the inner support member is between the water-swellable elastic material portion and another elastic material portion, And a conduit opening sealing structure, wherein the water swellable elastic material portions having different hardness are formed so as to have different colors. 9. The conduit opening sealing structure according to any one of claims 1 to 8, wherein the external support member is located at one or a plurality of predetermined locations between the flange portion and the inner peripheral surface at one end. A conduit opening sealing structure, characterized in that a recess is formed in the. 10. The conduit opening sealing structure according to claim 1, wherein the outer support member engages an outer peripheral edge portion of the collar portion with an outer edge portion of the conduit opening. A conduit opening sealing structure characterized in that a portion is formed. 11. The conduit opening sealing structure according to claim 1, wherein the outer support member has an outer peripheral portion facing the inside of the conduit formed into a substantially conical surface shape. Characteristic pipe line sealing structure. 12. The conduit opening sealing structure according to any one of claims 1 to 11, wherein the outer peripheral portion of the inner support member facing the inner peripheral surface of the outer support member is formed into a substantially conical surface shape. A conduit opening sealing structure characterized in that 13. The conduit opening sealing structure according to claim 2, wherein the external support member is located at two predetermined positions sandwiching a cutting position cut from the outer peripheral side to the inner peripheral side at one axial end. A conduit opening sealing structure, characterized in that each of the protruding portions is formed so as to project in a convex shape. 14. The conduit opening sealing structure according to claim 1, wherein the outer support member and / or the inner support member is made of a conductive material and has a predetermined ground. A conduit opening sealing structure, which is connected to a wire or a grounded conductor and grounded.