JP6522479B2 - Rubber ring type wave prevention device - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a rubber ring wave anti-corrugation apparatus for preventing the progress of a cable wave riding phenomenon in which a cable laid in a underground electric wire underground pipeline moves in one direction.

  DESCRIPTION OF RELATED ART Conventionally, the cable movement prevention apparatus which prevents advancing of the cable wave riding phenomenon which the cable installed in the underground pipeline moves to one direction is known.

As a cable movement preventing device of this kind, in order to prevent the cable laid in the pipeline from moving in the laying direction, the fluid expansion and expansion is performed between the pipeline 111 and the cable 112 by the fluid press-in. A variable presser 120 is provided, and the variable presser 120 includes a first plate member 121 and a second plate member 122 formed of hard rubber which is a semi-rigid elastic material, and a flexible stretchable material. The side member 123 is made of soft rubber (see FIG. 10). The side member 123 is hermetically sealed by laterally surrounding the flat rectangular space 125 between the first plate member 121 and the second plate member 122, and the flat rectangular space 125 is a fluid. An air valve is provided to press in the air. Then, by feeding the pressurized air 126 into the flat rectangular space 125 surrounded by the side members 123, the flat rectangular space 125 expands while pressing the first and second plate members 121 and 122. The first plate member 121 is pressed against the inner wall surface of the conduit 111, and the second plate member 122 presses the outer peripheral surface of the cable 112. As a result, it is possible to obtain the restraint effect necessary to reliably prevent the movement of the cable 112 (for example, technical document 1). Here, FIG. 10 is a cross-sectional view of the conventional cable movement prevention device.

JP, 2005-253241, A

  However, in the conventional cable movement prevention device, if the load of the cable laid in the pipeline increases (the amount of current increases) and heat is held and the rubber expands, the surface pressure of the cable increases and deformation of the cable There was a problem that an adverse effect would occur. In addition, since the rubber shrinks when the load on the cable decreases (the amount of current decreases), there is also a concern that the contact pressure due to the shrinkage of the rubber may decrease.

  The present invention has been made in view of the above problems, and provides a rubber ring type anti-corrugation apparatus capable of holding the surface pressure of the contact surface to the cable laid in a pipe line at an allowable surface pressure. The purpose is

In order to solve the above problems and achieve the above object, according to the first aspect of the present invention, the cable laid in the underground wire conduit prevents the progression of the cable wave riding phenomenon in which the cable moves in one direction. Rubber ring type wave preventing device, the rubber member provided in contact with each between the inner wall of the underground wire conduit and the outer peripheral portion of the cable, and one side of the rubber member, It is provided on the outer peripheral part of the cable outside the middle electric wire conduit, and contacts the inlet side pressing plate whose outer diameter is larger than the diameter of the underground electric wire conduit inlet, and the other side of the rubber member. And at least four insertion openings formed through the inlet side holding plate through the rubber member from the inner holding plate and the inner side holding plate, and the respective insertion openings Rod inserted into the underground and the underground electric conduit A spring member that fits with the insertion rod portion of the first part and applies a compressive force to the rubber member between the inlet side pressure plate and the inner pipe pressure plate; the spring member includes the inlet side pressure plate and the inner pipe side pressure plate The pressure of the contact surface between the rubber member and the cable is held at a pressure within a predetermined range by the compressive force applied to the rubber member between the plates, and the rubber member is formed as five layers in the underground wire conduit cross-sectional direction The layers at both ends and the center are rubber rings having a hardness of approximately 30, and the layers between the rubber layers at both ends and the center are made from polyvinyl chloride, respectively .

Although the rubber member contracts and the pressure on the contact surface between the cable and the rubber member decreases at low temperatures when no current flows in the cable in the conduit, according to the present invention, the conduit of the inlet side pressing plate of the insertion rod The rubber member between the inlet pressure plate and the inner pressure plate is compressed by the spring member provided in the outward direction, and the pressure of the pressure on the contact surface between the rubber member and the cable is made within the predetermined range by the compression force. Can be held. In addition, when current flows in the cable in the conduit, the cable and the rubber member expand with heat, and the pressure on the contact surface between the cable and the rubber member increases, but also in this case, the spring force of the spring member On the contrary, since the inlet side pressing plate is pressed and moved in the pipe outward direction, the pressure on the contact surface of the cable and the rubber member is weakened by that amount, and the pressure on the contact surface of the cable and the rubber member is within a predetermined range. It can be pressure. Further, the rubber member has five layers in the cross-sectional direction of the conduit, the layers at both ends and the center are rubber rings having a hardness of about 30 and vinyl chloride between the rubber rings having a hardness of about 30 at both ends and the center Since the ring is made of a material, the coefficient of thermal expansion of the entire rubber member becomes lower and the amount of expansion and contraction of the entire rubber member can be reduced as compared to the case where the entire rubber member is made of rubber. As a result, the amount of expansion and contraction of the entire rubber member can be reduced, so that the pressure on the contact surface between the cable and the rubber member can be easily held within a certain range (allowable pressure range). Thus, deformation of the cable due to high pressure on the contact surface of the cable and the rubber member can be prevented, and surface pressure on the cable (gripping due to a decrease in pressure on the contact surface of the cable and the rubber member) Power) can also be prevented.

  According to a second aspect of the present invention, there is provided a rubber ring type wave preventing device according to the first aspect, wherein the rubber member is characterized in that the portion in contact with the cable is tapered. It is.

  According to the present invention, since the portion of the rubber member in contact with the cable has a tapered shape, the movement resistance of the contact surface between the rubber member and the cable is increased, and the cable is less likely to move in the conduit. Thereby, it is possible to prevent the progress of the cable wave riding phenomenon in which the cable laid in the conduit moves in one direction.

According to a third aspect of the present invention, there is provided a rubber ring type wave preventing device according to the first aspect or the second aspect , wherein the inlet side pressing plate and the vinyl chloride ring of the rubber member are formed. The bore of the insertion port is characterized in that it is approximately 2 mm larger than the cross-sectional diameter of the insertion bar.

  According to the present invention, since the diameter of the insertion opening formed in the entrance side pressure plate and the vinyl chloride ring of the rubber member is larger than the cross sectional diameter of the insertion rod by about 2 mm, the rubber ring and the cable have a hardness of about 30 Even when thermally expanded, the rubber ring of approximately 30 expanded hardness enters between the insertion bar formed on the inlet side pressure plate and the vinyl chloride ring of the rubber member and the insertion rod, whereby the cable and the rubber member The pressure on the contact surface can be reduced. Thereby, the pressure on the contact surface of the cable and the rubber member can be easily held by the allowable pressure.

  According to the rubber ring type anti-corrugated device of the present invention, the surface pressure of the contact surface with the cable installed in the pipeline can be maintained at an allowable surface pressure.

It is a figure which attached the rubber ring type wave-number prevention device in one embodiment of the present invention to a underground electric wire pipeline. (A) It is a top perspective view of the rubber ring type | mold wave prevention apparatus in 1st Embodiment of this invention. (B) It is a lower perspective view of the same rubber ring type | mold wave prevention apparatus. (A) It is a front view of the same rubber ring type wave-power prevention device. (B) It is a side view of the same rubber ring type wave-power prevention device. (C) It is a rear view of the same rubber ring type wave-power prevention device. (D) It is a figure which shows an AA cross section. It is a figure which shows the procedure which attaches the same rubber ring type | mold wave prevention apparatus to a cable. It is sectional drawing which shows the state which attached the same rubber ring type | mold wave prevention apparatus to the underground wire channel. (A) It is an upper perspective view of the rubber ring type | mold wave prevention apparatus in 2nd Embodiment of this invention. (B) It is a lower perspective view of the same rubber ring type | mold wave prevention apparatus. (A) It is a front view of the same rubber ring type wave-power prevention device. (B) It is a side view of the same rubber ring type wave-power prevention device. (C) It is a rear view of the same rubber ring type wave-power prevention device. It is a figure which shows the component of the rubber ring type | mold wave prevention apparatus. It is a figure which shows the procedure which attaches the same rubber ring type | mold wave prevention apparatus to a cable. It is sectional drawing of the conventional cable movement prevention apparatus.

  Hereinafter, the rubber ring type wave prevention device in one embodiment concerning the present invention is explained. Here, FIG. 1 is a figure which attached the rubber ring type | mold wave multiplication prevention apparatus in one Embodiment of this invention to the underground wire channel.

  As shown in FIG. 1, in the rubber ring type anti-corrugated device 1, a cable (electric wire) 3 is laid in the underground wire conduit 2, and the water passage opening 4 of the underground wire conduit 2 is stopped. It is. Specifically, a manhole 5 (a manhole) is provided at an appropriate length of the cable 3 laid in the underground wire channel 2 buried in the ground. Water is prevented from entering the manhole 5 from the conduit port 4 which is the opening of the above. Here, the cable connection portion 6 is a member for connecting the left and right cables 3 in the manhole 5.

First Embodiment
Next, the rubber ring wave anti-wave device 1 attached to the underground wire conduit 2 will be specifically described. Here, FIG. 2 (a) is a top perspective view of the rubber ring type wave prevention device according to the first embodiment of the present invention, and FIG. 2 (b) is a lower perspective view of the rubber ring type wave prevention device. 3 (a) is a front view of the rubber ring wave anti-corrosion device, FIG. 3 (b) is a side view of the rubber ring wave anti-rubbing device, and FIG. 3 (c) is the same rubber ring It is a rear view of a formula wave prevention device, and Drawing 3 (d) is a figure showing an AA section. In the first embodiment, a single-ring rubber ring wave preventing device is used.

  As shown in FIG. 2, the rubber ring wave anti-waviness apparatus 1 includes a rubber member 7, a pipe inner side pressure plate 8, an inlet side pressure plate 9, an insertion rod 10, a spring member 11 and the like.

  The rubber member 7 is hollow and has an inner diameter substantially the same as the outer diameter of the cable 3 and an outer diameter substantially the same as the inner diameter of the underground wire conduit 2 (see FIG. 5). Since it is such a shape, when the rubber ring type wave prevention device 1 is installed in the underground wire conduit 2, the rubber member 7 contacts the inner wall of the underground wire conduit 2 and the outer peripheral portion of the cable 3 respectively. Arranged as. In the present embodiment, although the outer diameter of the rubber member 7 is substantially the same as the inner diameter of the underground wire conduit 2, the outer diameter of the rubber member 7 is the same as that of the underground wire conduit 2 The shape slightly smaller than the inner diameter is also included. The inner peripheral surface (portion in contact with the cable) of the rubber member 7 is formed in a tapered shape (see FIG. 3D). The rubber member 7 has a rubber ring (dot pattern) having a hardness of approximately 30 at both ends and in the center, and a rubber ring having a hardness of approximately 30 at the center and a rubber ring having a hardness of approximately 30 at both ends. A vinyl chloride ring is arranged. Thus, the rubber member 7 of the present embodiment is formed of five layers. In the present embodiment, the rubber member 7 is formed of a rubber ring having a hardness of about 30 and a ring made of vinyl chloride, but the present invention is not limited to this, a rubber ring having a hardness of about 30 is disposed at both ends and in the center A rubber ring having a hardness of about 70 may be disposed between a rubber ring having a central hardness of about 30 and a rubber ring having a hardness of about 30 on both ends. Further, the rubber member 7 has a shape obtained by roughly dividing the upper and lower cuts (see FIG. 3A) into substantially equal halves, and an insertion port 13 into which an insertion rod 10 described later is inserted is provided.

  The conduit inner pressure plate 8 is formed in substantially the same shape as the cross section of the rubber member 7. That is, the inner side pressure plate 8 is hollow and the inner diameter is approximately the same as the outer diameter of the cable 3 and the outer diameter is approximately the same diameter as the inner diameter of the underground electric wire channel 2 (FIG. 5) reference). In the present embodiment, the outer diameter of the inner pressure plate 8 is substantially the same as the inner diameter of the underground electric wire channel 2. However, as in the case of the rubber member 7, the substantially same diameter A shape in which the outer shape of the inner pressure plate 8 is slightly smaller than the inner diameter of the underground wire conduit 2 is also included. When the rubber ring wave anti-corrosion device 1 is installed in the underground electric conduit 2, the underground inner side pressure plate 8 of such a shape is an underground electric wire on the side surface side (deep side of the conduit) of the rubber member 7. It is disposed on the outer peripheral portion of the cable 3 in the conduit 2. Here, the inner pipe pressure plate 8 is made of plastic or stainless steel and has a shape obtained by dividing the upper and lower cuts into substantially equal halves, and an insertion port 13 into which an insertion rod 10 described later is inserted is formed. (See FIG. 3 (c)). In the present embodiment, the material of the pressure plate inner side pressure plate 8 is plastic or stainless steel, but the material is not limited to this, and another material may be used as the material.

  The inlet-side pressure plate 9 is hollow and has an inner diameter substantially the same as the outer diameter of the cable 3 and an outer diameter slightly larger than the diameter of the pipeline port 4 of the underground wire channel 2 (see FIG. 5) ). As described above, since the outer diameter of the inlet side pressure plate 9 is formed slightly larger than the diameter of the channel port 4 of the underground electric wire channel 2, the inlet side pressure plate 9 is the channel port 4 of the underground electric cable channel 2. And the rubber ring wave anti-wave device 1 does not enter the underground wire channel 2. Here, the entrance side pressing plate 9 is made of plastic or stainless steel and has a shape obtained by dividing the upper and lower cuts into substantially equal halves, and an insertion port 13 into which an insertion rod 10 described later is inserted is formed. . In the present embodiment, the material of the inlet side pressing plate 9 is plastic or stainless steel, but the material is not limited to this, and another material may be used as the material. As described above, the rubber member 7, the inner pipe pressure plate 8 and the inlet pressure plate 9 are respectively provided with the insertion openings 13. In the present embodiment, for convenience of explanation, the reference numerals of the respective insertion openings are used. Description will be made using the same reference numeral (13).

  The insertion rod 10 is inserted into the insertion opening 13 formed in each of the inner pipe pressure plate 8, the rubber member 7, and the inlet pressure plate 9. The end of the insertion rod 10 in the direction of the inner pressure plate 8 has a convex shape with a slightly larger outer diameter. Thus, the insertion rod 10 is inserted from the insertion opening 13 of the inner pipe holding plate 8 through the insertion opening 13 of the rubber member 7 so as to penetrate the insertion opening 13 of the inlet side holding plate 9. When the insertion rod 10 coming out of the insertion port 13 is pulled, the inner pipe pressure plate 8 is pulled toward the inlet pressure board 9 and disposed between the inlet pressure board 9 and the inner pipe pressure plate 8. The rubber member 7 is compressed. In this embodiment, the insertion hole 13 is provided in the inner pipe holding plate 8 and the insertion rod 10 is inserted from the insertion hole 13 of the inner pipe holding plate 8. However, the present invention is not limited to this. The end of the insertion rod 10 may be welded to the surface on the inlet side holding plate 9 side of the inner holding plate 8 without providing the insertion opening 13 in the inner side holding plate 8. In this case, the inner pipe pressure plate 8 and the insertion rod 10 are integrated. Further, in the present embodiment, nine insertion openings 13 are provided in each of the inner holding plate 8, the rubber member 7 and the inlet side holding plate 9, but the number is not limited to nine, and four or more insertion openings 13 are provided. The insertion rod 10 may be inserted into the

  The spring member 11 has a spiral shape, and is disposed on the outer peripheral portion of the insertion rod 10 on the side (outward direction of the underground electric wire channel) which is exposed to the outside from the insertion port 13 of the inlet side pressing plate 9. The spring member 11 is regulated by a washer 12 and a nut 14 fitted to the insertion rod 10. Specifically, the washer 12 and the spring member 11 are fitted in the outer peripheral portion of the insertion rod 10 in this order, and the screw portion of the insertion rod 10 and the threaded portion of the inner peripheral portion of the nut 14 (spring fastener) are screwed together. The spring member 11 is fitted to the insertion rod 10. Thus, the spring member 11 is disposed between the washer 12 and the nut 14. In the present embodiment, the screw portion of the insertion rod 10 and the screw portion of the inner peripheral portion of the nut 14 are screwed together to restrict the spring member 11. However, the present invention is not limited thereto. Other structures may be used as long as the spring member 14 is restricted.

  Next, the procedure for attaching the rubber ring type wave prevention device 1 to a cable will be described with reference to FIG. Here, FIG. 4 is a figure which shows the procedure which attaches the rubber ring type | mold wave prevention apparatus in 1st Embodiment of this invention to a cable.

  First, the insertion rod 10 is inserted into the insertion opening 13 of the pressure plate inner side pressure plate 8 having a substantially bisected shape (see FIG. 4A). In addition, as shown to Fig.4 (a), the insertion rod 10 is not inserted in the insertion port 13 of the right side upper end of the pipe line inner side holding plate 8 which divided into 2 substantially equal parts. This is because when installing the cable 3 in the rubber ring wave anti-wave device 1, a path for passing the cable 3 is required.

  Next, a rubber ring having a hardness of approximately 30 having a substantially bisected shape is shifted by rotating the insertion port 13 clockwise by one with respect to the pressure plate 8 on the inner side of the conduit, and the rubber ring having a hardness of approximately 30 The insertion rod 10 is inserted into the insertion opening 13 of the above, and the side surface of the rubber ring having a hardness of approximately 30 is brought into contact with the side surface of the inner pipe pressure plate 8 (see FIG. 4B). Here, the insertion rod 10 is not inserted into the insertion opening 13 at the upper left end of the rubber ring having a hardness of approximately 30 divided into approximately two equal parts. This is because the insertion opening 13 corresponds to the insertion opening 13 at the upper end on the right side of the above-mentioned approximately equally divided pipe inner side pressing plate 8.

  Next, the same arrangement as the insertion opening 13 of the vinyl chloride ring having a substantially bisected shape and the insertion opening 13 of the inner pipe holding plate 8 (one insertion opening 13 of the rubber ring having a hardness of about 30 is counter clockwise The insertion rod 10 is inserted into the insertion opening 13 of the vinyl chloride ring at the position rotated in the direction. Then, insert the rubber member 7 consisting of 5 layers into the same member in the order of a rubber ring with a hardness of approximately 30 → a ring made of vinyl chloride → a rubber ring with a hardness of approximately 30 → a ring made of vinyl chloride → a rubber ring with a hardness of approximately 30 The arrangement of the ports 13 is the same, and the insertion rods 10 are inserted into the respective insertion ports 13 (see FIG. 4C).

  Next, the inlet side pressing plate 9 having a substantially bisected shape is arranged in the same arrangement as the insertion opening 13 of the inner pipe holding plate 8 (position aligned with the insertion opening 13 of the ring made of vinyl chloride). The insertion rod 10 is inserted from the insertion port 13 of 9, and the side surface of the rubber ring having a hardness of about 30 of the inlet side holding plate 9 and the rubber member 7 is brought into contact. In the present embodiment, the rubber ring having a hardness of approximately 30 having a substantially bisected shape is mounted by rotating the insertion hole 13 in the clockwise direction in the insertion hole 13 with respect to the pressure plate 8 inside the duct. The present invention is not limited to this, and a rubber ring having a hardness of approximately 30 having a substantially halved shape is mounted by rotating the insertion opening 13 in the counterclockwise direction with respect to the holding plate 8 on the inner side of the conduit. It is also good.

  Next, after attaching the washer 12 and the spring member 11 to the outer peripheral portion of the insertion rod 10 coming out of the insertion opening 13 of the inlet side holding plate 9, screw the nut 14 onto the insertion rod 10 (see FIG. 4 (d)) ).

  Next, the cable 3 is inserted into the rubber ring type wave prevention device 1. Then, the insertion rod 10 is inserted into the insertion opening 13 of the rubber ring wave anti-corrosion device 1 in which the insertion rod 10 is not inserted, and the washer 12, the spring member 11 and the nut 14 are attached (see FIG. 4 (e)). Here, the insertion port 13 into which the insertion rod 10 is not inserted is the insertion port 13 corresponding to the insertion port 13 at the upper end on the right side of the pressure plate inner side pressing plate 8.

  Next, the rubber ring type wave anti-corrosion device 1 attached to the cable 3 is inserted into the underground electric conduit 2 along the cable 3 (see FIG. 4 (f)). When inserting the rubber ring type wave prevention device 1 into the underground wire channel 2, the spring member 11 of the rubber ring type wave prevention device 1 is compressed, and the rubber member 7 is expanded in the lateral direction to make the underground Insertion into the conduit 2 facilitates insertion. As a result, the rubber ring wave anti-wave device 1 is mounted in the underground wire conduit 2.

  Next, the movement of the rubber ring wave anti-wave device 1 according to this embodiment will be described with reference to FIG. FIG. 5: is sectional drawing which shows the state which attached the rubber ring type | mold wave multiplication prevention apparatus in 1st Embodiment of this invention to the underground wire channel.

  The rubber ring wave anti-wave device 1 is attached to the underground wire channel 2, but the rubber member 7 is in a state where no current flows in the cable 3 in the underground wire channel 2 (at the time of low temperature) It shrinks and the pressure on the contact surface between the rubber member 7 and the cable 3 decreases. However, in the present embodiment, the spring member 11 provided in the outside direction of the underground wire conduit 2 of the entrance side pressing plate 9 of the insertion rod 10 The rubber member 7 between the inlet side holding plate 9 and the inner pipe holding plate 8 is compressed by the pressure, and the pressure of the contact surface between the rubber member 7 and the cable 3 is made within the surface pressure allowable value range (predetermined Pressure within the range).

  In this state, when current flows through the cable 3, the cable 3 and the rubber member 7 expand with heat, and the pressure at the contact surface between the cable 3 and the rubber member 7 increases. Since the inlet side pressing plate 9 is pressed and moved against the spring force in the direction away from the underground wire conduit 2, the pressure on the contact surface between the cable 3 and the rubber member 7 is weakened by that amount, and the cable 3 and the rubber member 7 are The pressure of the contact surface can be a pressure within the surface pressure tolerance range (predetermined range). Here, the surface pressure allowable value is an allowable value of the pressure of the contact surface to the cable 3, and if the surface pressure becomes high, the cable manufacturer may specify an adverse effect such as deformation of the cable 3 or the like.

  Further, the rubber member 7 has five layers in the direction of the underground wire conduit 2 and the layers at both ends and the center are rubber rings having a hardness of about 30 and the layers at both ends and the center are a rubber ring having a hardness of about 30 Since the respective rings are made of vinyl chloride, the coefficient of thermal expansion of the entire rubber member 7 is reduced as compared with the case where the entire rubber member 7 is made of a rubber material, and the amount of expansion and contraction of the entire rubber member 7 can be reduced. As a result, the amount of expansion and contraction of the entire rubber member 7 can be reduced, so that the pressure on the contact surface between the cable 3 and the rubber member 7 can be easily held by the surface pressure allowable range (predetermined range). Thus, the deformation of the cable 3 due to the increase in pressure on the contact surface between the cable 3 and the rubber member 7 can be prevented, and the cable due to the decrease in pressure on the contact surface between the cable 3 and the rubber member 7 It is also possible to prevent the surface pressure (gripping force) against 3 from decreasing.

  Furthermore, since the diameter of the insertion opening 13 formed in the vinyl chloride ring of the inlet side holding plate 9 and the rubber member 7 is larger than the cross sectional diameter of the insertion rod 10, the rubber ring and the cable having a hardness of about 30 Even when 3 expands due to heat, a rubber ring having an expanded hardness of approximately 30 gets in between the insertion port 13 formed in the vinyl chloride ring of the inlet side holding plate 9 and the rubber member 7 and the insertion rod 10 The pressure on the contact surface between the cable 3 and the rubber member 7 can be reduced. As a result, the pressure at the contact surface between the cable 3 and the rubber member 7 can be easily held by the surface pressure allowable range (the allowable pressure).

  Further, since the contact surface between the cable 3 and the rubber member 7 is tapered, the movement resistance of the contact surface between the rubber member 7 and the cable 3 becomes large, and the cable 3 becomes difficult to move in the underground wire channel 2. Thereby, it is possible to prevent the progress of the cable wave riding phenomenon in which the cable 3 laid in the underground wire channel 2 moves in one direction.

Second Embodiment
Hereinafter, a rubber ring type wave prevention device according to a second embodiment of the present invention will be described. Here, in the first embodiment and the second embodiment, although the rubber ring wave anti-corrosion device used for the single core cable has been described in the first embodiment, in the second embodiment, a three-strand cable is used. It differs in that it is a rubber ring type wave-power prevention device used. In the second embodiment, only differences from the first embodiment will be described, and the description of the same parts as the first embodiment will be omitted. Here, FIG. 6 (a) is a top perspective view of a rubber ring type wave preventing device according to a second embodiment of the present invention, and FIG. 6 (b) is a lower perspective view of the rubber ring type wave preventing device. 7 (a) is a front view of the rubber ring wave anti-corrosion device, FIG. 7 (b) is a side view of the rubber ring wave anti-rubbing device, and FIG. 7 (c) is the rubber ring FIG. 8 is a rear view of the wave anti-waveform device, and FIG. 8 is a view showing components of the same rubber ring wave-prevention device.

  As shown in FIG. 6, the rubber ring wave anti-waviness apparatus 21 has a rubber member 22, a pipe inner side pressure plate 23, an inlet side pressure plate 24, an insertion rod 25, and a spring member 26.

  The rubber member 72, the inner pipe side pressure plate 23, and the inlet side pressure plate 24 are formed to have substantially the same diameter as the outer shape of the cable 27 having a three-strand inside (see FIG. 6). The cable 27 fitted in the rubber ring wave anti-corrugation device 21 is slightly twisted as it proceeds from the channel inner side pressure plate 23 of the rubber ring wave anti-wave wave device 21 to the inlet side pressure plate 24. Specifically, the inner side pressure plate 23, the inlet side pressure plate 24, and the shape of the hole into which the rubber ring 72 having a hardness of about 30 and the vinyl chloride ring cable 27 is inserted are as follows. They do not match at all, and have a slightly rotated shape (see FIG. 8). Here, FIG. 8 (a) is an inlet side holding plate 24, FIG. 8 (b) is a pipe inner side holding plate 23, and rubber comprising five layers in order from FIG. 8 (c) to FIG. 8 (g). The members 72 are stacked. As a result, the cable 27 has a slightly twisted shape as it proceeds from the duct inner side pressing plate 23 of the rubber ring wave anti-wave device 21 to the inlet side pressing plate 24. The other aspects are the same as in the first embodiment, and thus the description will be omitted.

  Next, the procedure for attaching the rubber ring type wave prevention device 1 to a cable will be described with reference to FIG. Here, FIG. 9 is a figure which shows the procedure which attaches the rubber ring type | mold wave multiplication prevention apparatus in 2nd Embodiment of this invention to a cable.

  As in the first embodiment, the insertion rod 25 is first inserted into the insertion port 30 of the inner pipe holding plate 23 of the rubber ring type anti-friction apparatus 21 of the second embodiment (see FIG. 9A).

  Next, the rubber ring having a hardness of approximately 30 is shifted by rotating the insertion port 30 in the counterclockwise direction by one piece with respect to the pressure plate 23 on the inner side of the duct. The insertion rod 25 is inserted (see FIG. 9B). In the present embodiment, the rubber ring having a hardness of approximately 30 having a substantially bisected shape is mounted by rotating the insertion opening 30 in the counterclockwise direction with respect to the pressure plate 23 on the inner side of the pipe. However, the present invention is not limited to this, and a rubber ring having a hardness of approximately 30 having a substantially halved shape is mounted by rotating the insertion port 30 clockwise by one rotation slot with respect to the pressure plate 23 inside the duct. It is also good.

  Next, the insertion slot 30 of the vinyl chloride ring is arranged in the same arrangement as the insertion slot 30 of the inner pressure plate 23, and the insertion rod 25 is inserted into the insertion slot 30 of the vinyl chloride ring. The rubber member 72 is composed of a rubber ring having a hardness of approximately 30 → a ring made of vinyl chloride → a rubber ring having a hardness of approximately 30 → a ring made of vinyl chloride → a rubber ring having a hardness of approximately 30 In the same manner, the insertion rods 25 are inserted into the respective insertion ports 30 (see FIG. 9C).

  Next, the inlet side holding plate 24 is arranged in the same arrangement as the insertion opening 30 of the inner pipe side holding plate 23, and the insertion rod 25 is inserted from the insertion opening 30 of the inlet side holding plate 24. Insertion of the inlet side holding plate 24 After the washer 29 and the spring member 26 are attached to the outer peripheral portion of the insertion rod 25 coming out of the opening 30, a nut 31 (spring fastener) is screwed on the insertion rod 25 (see FIG. 9D).

  Next, the cable 27 is inserted into the rubber ring type wave preventing device 21. Then, the insertion rod 25 is inserted into the insertion port 30 of the rubber ring wave anti-corrugation apparatus 31 in which the insertion rod 25 is not inserted, and the washer 29, the spring member 26 and the nut 31 are attached (see FIG. 9E).

  Next, the rubber ring wave anti-corrugation device 21 attached to the cable 27 is inserted along the cable 27 into the underground wire conduit 28 (see FIG. 9F).

  The movement of the rubber ring wave anti-corrugation apparatus 21 in the present embodiment is the same as that of the first embodiment, so the description will be omitted.

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. Further, the scope of the present invention is shown not by the above description but by the description of the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

DESCRIPTION OF SYMBOLS 1 Rubber ring type wave prevention device 2 underground electric wire pipeline 3 cable 4 pipeline port 5 manhole 6 cable connection part 7 rubber member 8 pipeline inner side pressing plate 9 inlet side pressing plate 10 insertion rod 11 spring member 12 washer 13 insertion port 14 Nut 21 Rubber ring wave anti-wave device 22 Rubber ring 23 Pipe inner side pressure plate 24 Entrance side pressure plate 25 Insertion rod 26 Spring member 27 Cable 28 Ground electric wire pipeline 29 Washer 30 Insertion port 31 Nut

Claims (3)

It is a rubber ring type wave rover prevention device which prevents the progress of a cable rippling phenomenon in which a cable laid in a underground electric wire pipeline moves in one direction,
A rubber member provided in contact with each other between the inner wall of the underground wire conduit and the outer peripheral portion of the cable;
An inlet-side pressure plate that contacts one side of the rubber member and is provided on an outer peripheral portion of the cable outside the underground wire conduit, and whose outer diameter is larger than the diameter of the underground wire conduit inlet;
A conduit inner side pressing plate provided on an outer peripheral portion of the cable in the underground wire conduit, in contact with the other side surface of the rubber member;
At least four insertion ports formed by penetrating the inlet side holding plate from the inner pipe holding plate via the rubber member are provided, and the insertion rods are inserted into the respective insertion openings,
A spring member fitted with a portion of the insertion rod in the outer direction of the underground wire conduit of the inlet side pressing plate to apply a compressive force to the rubber member between the inlet side pressing plate and the inner pipe pressing plate; And have
The spring member is configured such that the pressure of the contact surface between the rubber member and the cable is within a predetermined range by the compression force applied to the rubber member between the inlet side pressing plate and the inner pipe pressing plate. Let it hold ,
The rubber member is formed as five layers in the underground wire channel cross-sectional direction, and the layers at both ends and the center are rubber rings having a hardness of about 30 and the hardness of the layers at both ends and the center is about 30 A rubber ring type wave prevention device characterized in that each is made of a vinyl chloride ring . The rubber ring type anti-corrugated device according to claim 1, wherein a portion of the rubber member in contact with the cable is tapered. Diameter of the insertion port formed in a polyvinyl ring chloride of the inlet-side pressing plate and the rubber member, as claimed in claim 1 or claim 2, wherein the substantially 2mm larger than the cross-sectional diameter of the insertion rod Rubber ring wave prevention device.

Images