JP2013135492A - Water stop device for cable conduit port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, in a conventional water stop device for a cable conduit port, since the thickness of a seal block body having high rubber hardness is narrower than the thickness of a neighboring seal block body having a low rubber hardness, water may be leaked from the periphery of the seal block bodies.SOLUTION: A water stop device comprises rubber seal block bodies 6 which are disposed within a conduit 2 while being divided into at least three or more with a predetermined thickness width in an insertion direction and a perpendicular direction, and fastening panels 7 which are provided before and behind the seal block bodies 6. The seal block bodies 6 are arrayed in such a manner that each of the seal block bodies 6 alternately has higher and lower rubber hardness than that of the neighboring seal block body 6, and thickness of the hard seal block body having a higher rubber hardness than that of the neighboring seal block body 6 is made wider than that of the neighboring soft seal block body having lower rubber hardness.

Description

  The present invention relates to a water stop device for a cable pipe opening, in which a cable is laid in the pipe and the pipe opening of the pipe is stopped.

  2. Description of the Related Art Conventionally, a water stop device for a cable pipe opening that uses a cable laid in the pipe and stops the pipe opening of the pipe has been used.

  As a water shutoff device for this type of cable pipe opening, a rubber seal block body that is inserted and supported in an insertion hole in a state where the cables are sealed with water and inserted into the cable conduit is used as this seal block. A cable conduit waterproofing device that is clamped with clamping bolts and nuts via a clamping board placed before and after the body, and the seal block body is divided into at least two at right angles to the insertion direction. There has been one in which the rubber hardness of one seal block body is different from the rubber hardness of the other seal block body (for example, Patent Document 1). This seal block body has an insertion hole from the outside, and an open cut portion and a connection cut portion for connecting the respective through holes. The positions of these open cut portions and the connection cut portions are set to the front and rear. It was made to differ from each position of the open cut part of another seal block body, and a connection cut part.

JP 2006-158057 A

  In the conventional cable conduit waterproofing device, the thickness width of the seal block body having a high rubber hardness divided perpendicular to the insertion direction is narrower than the thickness width of the seal block body having a soft rubber hardness adjacent thereto. This is to increase the inner surface of the pipe and the contact surface with the cable, and does not correspond to the thermal expansion and contraction specific to the cable. As a result, when the cable expands and contracts by heat and moves in the longitudinal direction in the insertion hole, the portion of the soft seal block body that contacts the cable conduit collides with the soft seal block body adjacent to the adjacent hard seal block body. As a result, the peripheral surface (circumferential portion) of the soft seal block body is damaged, and water leaks from the periphery of the seal block body (see FIG. 11). Here, FIG. 11 is a figure which shows the deformation | transformation state of the conventional soft seal block body when a cable expands and contracts thermally.

  The present invention has been made in view of the above problems, and even if the cable is thermally expanded and contracted and moves in the longitudinal direction in the insertion hole, water leakage from the periphery of the seal block body is eliminated, and the pipeline in which the cable is laid An object of the present invention is to provide a water stopping device for a cable pipe opening that can stop the pipe opening.

  In order to solve the above problems and achieve the above object, the first aspect of the present invention is provided with a block body cable insertion hole through which a cable is inserted and a block body bolt insertion hole through which a tightening bolt is inserted. A rubber seal block body arranged in the pipe line in a state of being divided into at least three or more in the direction perpendicular to the insertion direction with a predetermined thickness width, and provided before and after the seal block body, through which the cable is inserted A fastening board cable insertion hole and a fastening board provided with a fastening board bolt insertion hole through which the fastening bolt is inserted, and the seal block body has the rubber hardness of the adjacent seal block body in the adjacent seal. It is harder than the rubber hardness of the block body and is alternately arranged softly. The thickness width of the hard seal block body whose rubber hardness is harder than the adjacent seal block body is the adjacent rubber hardness. It is characterized in that it has larger than the thickness width of the soft soft seal block.

  When the rubber hardness of the seal block body is hard and soft and is tightened using a tightening board in an alternately arranged state, the soft seal block body expands and expands in the radial direction from the hard seal block body. In this state, when the cable is thermally expanded and contracted and moves in the longitudinal direction in the insertion hole, the soft seal block body also moves with the movement of the cable, and the portion of the soft seal block body that is in contact with the cable is adjacent. The peripheral surface (circumferential portion) of the soft seal block body is damaged by colliding with the soft seal block body adjacent to the hard seal block body. According to the present invention, since the thickness width of the hard seal block body is larger than the thickness width of the adjacent soft seal block, even if the cable is thermally expanded and contracted and moves in the longitudinal direction in the insertion hole, the soft seal The part in contact with the cable of the block body is less likely to collide with the soft seal block body next to the adjacent hard seal block body, and the peripheral surface of the soft seal block body is not damaged, and water leaks from the periphery of the seal block body. Can be eliminated. Thereby, the water stop effect of a seal block body can be improved.

  According to a second aspect of the present invention, there is provided a water shutoff device for a cable conduit opening according to the first aspect, wherein the seal block body and the clamping board are each divided into two or more in the insertion direction. The hard seal block body and the soft seal block body are arranged in the pipeline with different division positions in the insertion direction, and the division position in the insertion direction of the clamping disk and the division position in the insertion direction of the hard seal block body are approximately It is the same and arrange | positions in a pipe line.

  According to the present invention, since the dividing position in the insertion direction of the clamping board and the dividing position in the insertion direction of the hard seal block body are substantially the same, the clamping force of the clamping board is directly transmitted to the hard seal block body, The tightening force of the tightening board can be efficiently transmitted to the hard seal block body. In addition, since the hard seal block body is divided at a different position from the soft seal block body, the tightening force of the hard seal block body is transmitted to the adjacent soft seal block body, I can tell evenly. Thereby, the stress distribution difference of the clamping force in the soft seal block body is reduced, and the water stop effect of the seal block body can be improved.

  According to a third aspect of the present invention, there is provided a water shut-off device for a cable conduit port according to the second aspect, wherein the clamping disk is divided into two divided clamping disks divided in the insertion direction. Two or more clamping board bolt insertion holes are provided, two or more clamping board bolt insertion holes are provided in the divided clamping board, and block body bolt insertion holes provided corresponding to these clamping board bolt insertion holes The seal block body is press-contacted through the tightening disc by inserting a tightening bolt into the base plate.

  According to the present invention, two or more clamping board bolt insertion holes provided in the divided clamping board and the block bolt insertion holes provided corresponding to the clamping board bolt insertion holes are inserted into the clamping bolts. As a result, the tightening force of the tightening bolt can be transmitted evenly to the entire split tightening machine, and the stress distribution difference of the tightening force in the soft seal block body is further reduced, and the water blocking effect of the seal block body is improved. be able to.

  According to a fourth aspect of the present invention, there is provided a water shut-off device for a cable conduit opening according to any one of the first to third aspects, wherein the hard seal block body has a rubber hardness of approximately 70 degrees. It is a block body, and the soft seal block body is a seal block body having a rubber hardness of about 30 degrees.

  According to the present invention, since the soft seal block body having a rubber hardness of about 30 degrees is arranged next to the hard seal block body having a hardness of about 70 degrees and being hard and less deformed, the soft seal block body is a hard seal. When tightened to the block body, the tightening force of the tightening board spreads over the entire soft seal block body, expands and expands in the radial direction in the pipe, and is inserted into the pipe inner peripheral surface and the block body cable insertion hole. Each cable can be strongly pressed against the outer peripheral surface of the cable. Thereby, the water stop effect of a seal block body can be improved.

  As described above, according to the water shutoff device for a cable pipe opening of the present invention, even if the cable is thermally expanded and contracted and moves in the longitudinal direction in the insertion hole, water leakage from the periphery of the seal block body can be eliminated. It is possible to stop the water at the pipe opening of the pipe where the cable is laid.

It is the schematic which shows the installation condition of the water stop apparatus of the duct opening for cables in one Embodiment of this invention. It is a disassembled perspective view of the water stop apparatus of the conduit opening for cables in the 1st Embodiment of this invention. (A) It is a side view of the water stop apparatus of the pipe line opening for cables. (B) It is a front view of the water stop apparatus of the pipe line opening for the cables. It is a front view of the seal block body of the water stop apparatus of the pipe line opening for the cables. It is a partial cross section figure which shows the state which attached the water stop apparatus of the pipe line opening for the cables to the pipe line. (A) It is a figure which shows the state where the cable is not thermally expanded and contracted. (B) It is a figure which shows the deformation | transformation state of a soft seal block body when a cable cools and shrinks. (C) It is a figure which shows the deformation | transformation state of a soft seal block body when a cable is extended with heat. It is a disassembled perspective view of the water stop apparatus of the pipe-line opening for cables in the 2nd Embodiment of this invention. (A) It is a side view of the water stop apparatus of the pipe line opening for cables. (B) It is a front view of the water stop apparatus of the pipe line opening for the cables. It is a front view of the seal block body of the water stop apparatus of the pipe line opening for the cables. It is a partial cross section figure which shows the state which attached the water stop apparatus of the pipe line opening for the cables to the pipe line. It is a figure which shows the deformation | transformation state of the conventional soft seal block body when a cable expands and contracts thermally.

  Hereinafter, an embodiment of a water stop device for a cable pipe port of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing a state of installation of a water stop device for a cable conduit port in one embodiment of the present invention.

  As shown in FIG. 1, a water stop device 1 for a cable pipe opening is configured such that a cable (electric wire) 3 is laid in a pipe 2 and the pipe opening 4 of the pipe 2 is stopped. Specifically, a manhole 5 (manhole) is provided at an appropriate length portion of the cable 3 laid in the conduit 2 buried in the ground. The opening of the conduit 2 to the manhole 5 is provided. This prevents water from entering the manhole 5 from the pipe opening 4 that is a part. Here, the cable connecting portion 34 is a member for connecting the left and right cables 3 in the manhole 5, and the thermal expansion / contraction absorbing portion 33 is a structure that absorbs thermal expansion / contraction of the cable 3 when the cable 3 is thermally expanded / contracted. It is.

  Next, the structure of the water stop device 1 for the cable conduit opening in the first embodiment of the present invention will be described. Here, FIG. 2 is an exploded perspective view of the water shut-off device for the cable conduit opening in the first embodiment of the present invention, and FIG. 3 (a) is a side view of the water shut-off device for the cable conduit opening. Fig. 3 (b) is a front view of the water stop device for the cable pipe opening, Fig. 4 is a front view of the seal block body of the water stop device for the cable pipe opening, and Fig. 5 is for the cable. It is a partial cross section figure which shows the state which attached the water stop apparatus of the pipe opening to the pipe line. Here, this embodiment demonstrates the water stop apparatus 1 of the cable pipe opening used for the single core power transmission cable (CV cable) which transmits electricity.

  As shown in FIG. 2, the water shutoff device 1 for the cable pipe opening includes a seal block body 6 (6 a, 6 b, 6 c, 6 d, 6 e), a tightening board 7 (7 a, 7 b), and a tightening bolt 8. And.

  The seal block body 6 is made of ethylene propylene rubber and is formed in a cylindrical shape. The block body cable insertion hole 9 through which the cable 3 such as a power transmission cable is inserted and the block body bolt insertion hole 10 through which the tightening bolt 8 is inserted. Each is provided (see FIG. 4). And it arrange | positions in the pipe line 2 in the state divided | segmented into five in the orthogonal direction with the insertion direction (direction along a pipe line direction) to the pipe line 2. FIG. In addition, in this embodiment, although arrange | positioned in the pipe line 2 in the state divided | segmented into five, not only this but a pipe | tube in the state divided | segmented into three or more (for example, three, seven, etc.) It may be arranged in the road 2. Here, the block body bolt insertion holes 10 provided in the seal block body 6 are formed at equal intervals in the circumferential direction of the seal block body 6.

  The seal block body 6 has a rubber hardness of the seal block body 6a of about 30 degrees, a rubber hardness of the seal block body 6b of about 70 degrees, a rubber hardness of the seal block body 6c of about 30 degrees, and a rubber hardness of the seal block body 6d. Are approximately 70 degrees, and the rubber hardness of the seal block body 6e is approximately 30 degrees, which are alternately arranged so as to be harder and softer than the rubber hardness of the adjacent seal block bodies 6 (see FIG. 3A). In the present embodiment, the hard seal block bodies 6b and 6d having a rubber hardness higher than that of the adjacent seal block body 6 are set to have a rubber hardness of about 70 degrees, and the soft seal block 6a having a rubber hardness softer than that of the adjacent seal block body 6; The rubber hardness of 6c and 6e is approximately 30 degrees. However, the rubber hardness of the soft seal block bodies 6a, 6c and 6e may be other rubber hardness as long as the rubber hardness of the soft seal block bodies 6a, 6c and 6e is relatively soft. As long as the rubber hardness of the block bodies 6b and 6d is relatively hard, other rubber hardness may be used. Further, the rubber hardnesses of the hard seal block bodies 6b and 6d and the soft seal blocks 6a, 6c and 6e may be different from each other.

  The soft seal block bodies 6a, 6c, 6e and the hard seal block bodies 6b, 6d are each divided into two in the insertion direction, and the soft seal block bodies 6a are combined by combining the divided seal block bodies. 6c, 6e, and hard seal block bodies 6b, 6d (see FIG. 4). In this embodiment, the seal block body 6 is divided into two in the insertion direction. However, the present invention is not limited to this, and the seal block body 6 is divided into two or more (for example, three) in the insertion direction. If there is, the number of divisions does not matter. In the seal block body 6, the thickness width of the hard seal block bodies 6b and 6d is larger than the thickness width of the soft seal blocks 6a, 6c and 6e (see FIG. 3A).

  The clamping board 7 (front clamping board 7a, rear clamping board 7b) is made of MC nylon (registered trademark) obtained by polymerizing and molding nylon monomer under atmospheric pressure, and is formed into a cylindrical shape. Are respectively provided with a fastening board cable insertion hole 11 and four fastening board bolt insertion holes 12 through which the fastening bolts 8 are inserted (see FIG. 2). And the clamping board 7 is divided | segmented into two each in the insertion direction, and the clamping board 7 is comprised combining the divided | segmented clamping machine (refer FIG.3 (b)). Here, the fastening board bolt insertion holes 12 provided in the fastening board 7 are formed at equal intervals in the circumferential direction of the fastening board 7. Further, the pipe insertion preventing member 35 makes the outer periphery of the water stop device 1 for the cable pipe opening larger than the pipe 2 so that the water stop apparatus 1 for the cable pipe opening does not enter the back of the pipe 2. Is to do. In this embodiment, the clamping board 7 is divided into two in the insertion direction. However, the present invention is not limited to this, and the clamping board 7 is divided into two or more (for example, three) in the insertion direction. If there is, the number of divisions does not matter. In the present embodiment, each of the divided tightening machines is provided with four tightening machine bolt insertion holes 12, but this is not limiting, and each of the divided fastening machines has two or more fastening machine bolt insertion holes 12. The number of the fastening board bolt insertion holes 12 is not limited as long as it is provided.

  The water shutoff device 1 for the cable conduit opening includes a tightening board cable insertion hole 11 of the rear rear fastening board 7b, a block body cable insertion hole 9 of the seal block body 6, and a fastening board of the front front fastening board 7a. The cables 3 are respectively inserted into the cable insertion holes 11, and then the tightening bolts 8 are respectively inserted into the block body bolt insertion holes 10 of the seal block body 6 and the tightening board bolt insertion holes 12 of the tightening board 7. The seal block body 6 is tightened by the attached board 7 (see FIG. 2). Thereby, the soft seal block bodies 6a, 6c, and 6e are expanded and expanded in the radial direction by the tightening disc 7, and are strongly pressed against the inner peripheral surface of the pipe line 2 (see FIG. 5). In this embodiment, a screw hole is formed on the inner peripheral surface of the tightening board bolt insertion hole 12 of the tightening board 7 and tightened with the tightening bolt 8. However, the present invention is not limited to this. A screw hole may not be engraved on the inner peripheral surface of the hole 12 but may be tightened by a tightening bolt 8 and a nut (not shown).

  As shown in FIG. 3 (a), the hard seal block bodies 6b and 6d and the soft seal block bodies 6a, 6c and 6e, which are divided into two parts, have different division positions in the insertion direction. Are arranged in the pipeline 2. Specifically, the block body bolt insertion hole 10 of the hard seal block bodies 6b and 6d and the block body bolt insertion hole 10 of the soft seal block bodies 6a, 6c and 6e are shifted one by one and arranged in the pipe line 2. ing. The dividing position in the insertion direction of the tightening disc 7 and the dividing position of the hard seal block bodies 6b and 6d are substantially the same and are arranged in the pipe line 2. As described above, since the dividing position in the insertion direction of the tightening disk 7 and the dividing position in the insertion direction of the hard seal block bodies 6b and 6d are substantially the same, the tightening force of the tightening disk 7 is directly applied to the hard seal block body. It is transmitted to 6b and 6d, and the tightening force of the tightening board 7 can be efficiently transmitted to the hard seal block bodies 6b and 6d. Further, since the divided positions of the hard seal block bodies 6b and 6d are different from the divided positions of the soft seal block bodies 6a, 6c and 6e, the tightening force of the hard seal block bodies 6b and 6d is adjacent to the adjacent soft seal block body. 6a, 6c, 6e, and partial stress distribution can be prevented from occurring in the soft seal block bodies 6a, 6c, 6e. Thereby, the stress distribution difference of the clamping force in soft seal block body 6a, 6c, 6e decreases, and the water stop effect of the seal block body 6 can be improved. Further, the fastening bolts 8 are inserted into the four fastening plate bolt insertion holes 12 and the block body bolt insertion holes 10 corresponding to the fastening plate bolt insertion holes 12 in the two divided fastening plates. By inserting, it is possible to uniformly transmit the tightening force of the tightening bolt 8 to the entire divided tightening panel 7 without causing partial stress distribution, and tightening in the soft seal block bodies 6a, 6c, 6e. The difference in stress stress distribution can be further reduced.

  Next, referring to FIG. 6, the cable 3 is thermally expanded and contracted and moved in the longitudinal direction in the block body cable insertion hole 9 in a state where the seal block body 6 is tightened in the front-rear direction by the tightening bolts 8. explain. Here, FIG. 6A is a diagram showing a state where the cable is not thermally expanded and contracted, and FIG. 6B is a diagram showing a deformed state of the soft seal block body when the cable is cooled and contracted, FIG.6 (c) is a figure which shows the deformation | transformation state of a soft seal block body when a cable is extended with heat.

  When the cable 3 is thermally expanded and contracted and moved in the longitudinal direction in the block cable insertion hole 9 in a state where the seal block body 6 is tightened in the front-rear direction by the tightening bolt 8, the soft seal block bodies 6a, 6c and 6e are also moved. It moves as the cable 3 moves. In this case, the portion of the circumferential surface of the soft seal block bodies 6a, 6c, 6e that is in contact with the cable 3 is dragged by the cable 3, and between the outer circumferential surface of the cable 3 and the circumferential surface of the hard seal block bodies 6b, 6d. Get in. In the present embodiment, the cable 3 is thermally expanded and contracted to move in the block body cable insertion hole 9 in the longitudinal direction, and the circumferential surfaces of the soft seal block bodies 6a, 6c, 6e are the outer peripheral surface of the cable 3 and the hard seal block body. Even if it enters between the circumferential surfaces of 6b and 6d, the thickness width of the hard seal block bodies 6b and 6d is larger than the thickness width of the adjacent soft seal block bodies 6a, 6c and 6e. It becomes difficult to collide with the soft seal block bodies 6a, 6c, 6e further adjacent to the block bodies 6b, 6d, and the soft seal block bodies collide with each other so that the peripheral surfaces of the soft seal block bodies 6a, 6c, 6e are hardly damaged. Become. Thereby, water leakage from the periphery of the seal block body 6 can be prevented.

  Next, 2nd Embodiment of the water stop apparatus of the pipe-line opening for cables of this invention is described. FIG. 7 is an exploded perspective view of a water stop device for a cable pipe opening according to the second embodiment of the present invention, and FIG. 8 (a) is a side view of the water stop device for the cable pipe opening. (B) is a front view of the water stop device for the cable conduit opening, FIG. 9 is a front view of the seal block body of the water stop device for the cable conduit opening, and FIG. It is a partial cross section figure which shows the state which attached the water stop apparatus to the pipe line. Here, in the first embodiment, the water shut-off device 1 for a cable conduit opening used for, for example, a single-core power transmission cable (CV cable) that transmits electricity has been described, but in the second embodiment, electricity is transmitted. A water stop device 21 for a cable pipe opening used for a three-core power transmission cable (CVT cable) will be described. In the second embodiment, only parts different from the first embodiment will be described.

  The cable 23 is a three-core power transmission cable (CVT cable) in which three cables are twisted and integrated. The seal block body 26 is provided with a block body cable insertion hole 29 in which a hole is formed in the inner peripheral surface in accordance with the twist of the three-core cable 23 (see FIGS. 7 and 9), and tightening The board 27 (front fastening board 27a, rear fastening board 27b) is provided with a fastening board cable insertion hole 31 through which the three-core cable 23 is inserted (see FIGS. 7 and 8B). .

  Then, the cables 23 are respectively inserted into the fastening board cable insertion holes 31 of the rear rear fastening board 27b, the block body cable insertion holes 29 of the seal block body 26, and the fastening board cable insertion holes 31 of the front front fastening board 27a. Then, the tightening bolt 8 is inserted into the block body bolt insertion hole 30 of the seal block body 26 and the tightening board bolt insertion hole 32 of the tightening board 27, respectively. It is tightened (see FIG. 7). A core material (not shown) is sandwiched in the gap at the center of the three-core cable 23 to prevent water leakage from the gap between the three-core cable 23 (see FIG. 8B). Accordingly, the soft seal block bodies 26a, 26c, and 26e are expanded and expanded in the radial direction by the tightening disc 27, and are strongly pressed against the inner peripheral surface of the pipe line 2 (see FIG. 10). Also in the water stop device 21 of the cable pipe opening configured as described above, the same operational effects as those of the first embodiment are exhibited.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Water stop device of cable pipe opening 2 Pipe 3 Cable 4 Pipe opening 5 Manhole 6 Seal block body 7 Tightening board 8 Tightening bolt 9 Block body cable insertion hole 10 Block body bolt insertion hole 11 Tightening board cable insertion hole 12 Clamping board bolt insertion hole 21 Water shutoff device 23 for cable conduit port Cable 26 Seal block body 27 Clamping board 29 Block body cable insertion hole 30 Block body bolt insertion hole 31 Clamping board cable insertion hole 32 Clamping board bolt Insertion hole 33 Thermal expansion / contraction absorption part 34 Cable connection part 35 Pipe insertion prevention member

Claims (4)

A water shut-off device for a cable pipe opening, in which a cable is laid in the pipe and stops the pipe opening of the pipe,
A block body cable insertion hole for inserting a cable and a block body bolt insertion hole for inserting a fastening bolt are provided, and the block body bolt insertion hole is divided into at least three in a direction perpendicular to the insertion direction with a predetermined thickness width in the pipeline. A rubber seal block body to be disposed;
A clamping board provided before and after the seal block body and provided with a clamping board cable insertion hole for inserting a cable and a clamping board bolt insertion hole for inserting the clamping bolt;
The seal block body has a rubber hardness of the adjacent seal block bodies harder than the rubber hardness of the adjacent seal block bodies, and is arranged alternately and softly,
A water stop device for a cable conduit opening, characterized in that the thickness width of a hard seal block body whose rubber hardness is higher than that of the adjacent seal block body is larger than the thickness width of a soft seal block whose adjacent rubber hardness is soft. The seal block body and the clamping board are each divided into two or more in the insertion direction,
The hard seal block body and the soft seal block body are arranged in the pipeline with different division positions in the insertion direction,
2. The water stop of the cable pipe opening according to claim 1, wherein the dividing position in the insertion direction of the clamping board and the dividing position in the insertion direction of the hard seal block body are substantially the same and arranged in the pipe. apparatus. The clamping board is provided with two or more clamping board bolt insertion holes in each divided clamping board divided in the insertion direction,
By inserting the clamping bolts into the clamping bolt bolt insertion holes provided in two or more of the divided clamping boards and the block body bolt insertion holes provided corresponding to the clamping board bolt insertion holes. 3. The water stop device for a cable pipe opening according to claim 2, wherein the seal block body is pressed into contact with the clamping board. The hard seal block body is a seal block body having a rubber hardness of approximately 70 degrees,
The water shutoff device for a cable conduit opening according to any one of claims 1 to 3, wherein the soft seal block body is a seal block body having a rubber hardness of approximately 30 degrees.

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