JP4579092B2 - Pipe structure - Google Patents

Description

  The present invention relates to a conduit structure for guiding a communication cable such as a telephone line in the ground.

  Conventionally, a communication cable such as a telephone line is composed of, for example, a plurality of trunk cables connecting telephone offices, and a plurality of lead-in cables branched from the trunk cable and drawn into a building such as a house or a store. In order to maintain the scenery of the road, it is known to embed each main line cable and each lead-in cable under the road surface of the road (see, for example, Patent Document 1).

  In this pipeline structure, the trunk cable and the lead-in cable are accommodated in different pipe members. This reduces the proportion of each cable that occupies the space under the road surface when each cable is embedded under the road surface of the road, compared to the case where each cable is housed in a different pipe member, for example. Therefore, both cables can be embedded under the road surface of a road having a relatively small width, such as a road provided in a residential area or a shopping street.

  However, in the future, if the underground cable has further progressed and it becomes necessary to embed the main cable and the lead-in cable under the road surface of the narrow road with a smaller width dimension, the above-mentioned pipe structure is used for the narrow road. It becomes difficult to provide under the road surface, and this pipe structure cannot sufficiently cope with a narrow road.

  Therefore, the inventor of the present application has proposed a pipeline structure that can solve the above problem in Japanese Patent Application No. 2005-231436. In this pipe line structure, the pipe member for accommodating the main cable is provided along the longitudinal direction of the pipe member and is rotatable around the axis of the pipe member. A dividing member is provided to divide the inside of the pipe member into two vertically when the inside of the pipe member is seen in the cross section of the pipe member so as to define an accommodating portion for accommodating the drawing cable separately from the main line cable. . By accommodating the retracting cable in the accommodating portion, the trunk cable and the retracting cable are accommodated in a single tube member, so that the trunk cable and the retracting cable are different from each other as in the prior art. Compared with the case where the cables are housed inside, when the cables are buried under the road surface of the road, the ratio of the cables to the space under the road surface can be further reduced.

Accordingly, since the pipe structure can be made more compact than before, for example, under the road surface of a narrow road having a smaller width than a road provided in a residential area or a shopping street, each main cable and Each lead-in cable can be embedded easily.
JP 2004-120956 (Page 4-6, FIG. 6)

  By the way, when the drawing cable is taken out from the pipe member in order to draw the drawing cable accommodated in the accommodating portion defined in the pipe member into the building, an opening is formed in the pipe member in accordance with the drawing direction from the pipe member to the building. It is necessary to form in position. However, since the pipe structure described in the specification of Japanese Patent Application No. 2005-231436 is not provided with means for holding the dividing member at a desired rotational position within the pipe member, the cable for drawing into the pipe member is not provided. Even if the opening is formed according to the pulling direction of the cable, the dividing member may not be arranged at a rotational position that allows the pulling cable to be taken out from the tube member through the opening. Can not be taken out properly.

  Then, the objective of this invention is providing the pipe line structure which can take out a draw-in cable from a pipe member appropriately according to the drawing-in direction of the draw-in cable from the inside of a pipe member to a building.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a trunk pipe cable is accommodated to guide the trunk cable under the road surface of the road, and a cylindrical pipe member embedded under the road surface is provided. A pull-in cable which is provided in the pipe member so as to extend along the longitudinal direction of the pipe member and to be rotatable around an axis of the pipe member, and is branched from the main cable and drawn into a building. A dividing member that divides the inside of the pipe member into at least two parts to define an accommodating portion for accommodating in the pipe member, and the dividing member is interposed between the dividing member and the pipe member. A holding means for holding at the desired rotational position is provided.

Further, the present invention is the above invention , wherein the dividing member has a cross section of the pipe member inside the pipe member so that the inside of the pipe member is divided into two in the vertical direction when the cross section of the pipe member is viewed in cross section. And a pair of extending portions extending along the inner peripheral surface of the tubular member from each side edge of the planar portion toward one side of the planar portion. The holding means is provided on the inner peripheral surface of the tube member at a plurality of protrusions formed at equal intervals along the circumferential direction on the inner peripheral surface of the tube member. A plurality of recesses formed on opposing surfaces at intervals equal to the interval between the projections along the extension direction of the extensions, and engageable with the projections. To do.

  According to the first aspect of the present invention, the pipe member for accommodating the trunk cable and the accommodating portion provided in the pipe member for accommodating the lead-in cable are defined in the pipe member. Since the holding member for holding the divided member at its desired rotational position is provided between the divided member that divides the inside of the tube member into at least two, the drawing direction of the drawing cable to the pipe member Accordingly, the split member can be held in the pipe member at a rotation position at which the drawing cable can be taken out from the pipe member through the opening formed according to the above. Thereby, at the time of drawing in the cable for drawing in to a building, the cable for drawing in can be appropriately taken out from the inside of the pipe member through the opening.

Further , according to the present invention , the holding means includes a plurality of protrusions formed at equal intervals along the circumferential direction on the inner peripheral surface of the tube member, and the tube member of each extending portion of the split member. The surface facing the inner peripheral surface is formed with a plurality of recesses that are formed at intervals equal to the interval between the protrusions along the extension direction of each extension, and can be engaged with each protrusion. Therefore, the rotation position of the dividing member can be adjusted for each interval between the protrusions. Thereby, the rotation position of a division member can be easily and correctly aligned with the rotation position corresponding to the opening formed according to the drawing-in direction of the drawing-in cable in the pipe member.

  The present invention will be described with reference to the illustrated embodiments.

  FIG. 1 shows an example in which the present invention is applied to a conduit structure 10 for guiding a communication cable 12 such as a telephone line in the ground.

  As shown in FIG. 1, a pipe structure 10 according to the present invention includes a pipe member 11 having a circular cross section. The pipe member 11 is formed of a high-strength synthetic resin material such as hard vinyl chloride, for example, and when the plurality of trunk cables 13 of the communication cable 12 such as a telephone line are embedded below the road surface, In order to protect each main line cable from, for example, groundwater, it has a function as a protective tube for accommodating each main line cable.

  The trunk cable 13 accommodated in the pipe member 11 is, for example, a cable connecting between telephone offices, as is well known. In the pipe member 11, a plurality of sheath pipes 21 into which the main line cables 13 are inserted one by one are accommodated.

  The pipe member 11 is branched from the main line cable 13 and accommodates a plurality of lead-in cables 14 drawn into a building such as a house or a store (not shown) separately from the main line cables 13. A dividing member 15 is provided for dividing the inside of 11 into at least two.

  In the illustrated example, the dividing member 15 is formed of the same synthetic resin material as that of the tube member 11, and is formed separately from the tube member 11. Moreover, the division member 15 is comprised by the division member which divides | segments into two up and down seeing the inside of the pipe member 11 in the cross section of this pipe member in the example of illustration. The dividing member 15 extends along the longitudinal direction of the tube member 11, and a plate-like plane portion 16 inserted into the tube member so as to cross the cross section of the tube member 11 and the width direction of the plane portion. It has a pair of plate-like extending portions 18 extending from the side edge portions 17 facing each other toward one side of the flat surface portion 16.

  In the illustrated example, each side edge portion 17 of the flat surface portion 16 is in contact with the inner peripheral surface 11a of the tube member 11, and the angle formed with the tangent at the contact point with the inner peripheral surface is an obtuse angle. Inclined toward the other side of the flat portion 16. Due to the arrangement of the plane portion 16 in the pipe member 11, a trunk cable housing portion 19 for accommodating each trunk cable 13 is defined inside the tube member 11 on the one side of the plane portion 16. A retractable cable accommodating portion 20 for accommodating each retractable cable 14 is defined on the other side. Each sheath tube 21 described above is accommodated in the trunk cable accommodating portion 19.

  In the example shown in the drawing, each extending portion 18 is composed of a leaf spring member. Each extending portion 18 is curved with a curvature substantially equal to the curvature of the inner peripheral surface 11a of the tube member 11 along the extending direction, and the tube member 11 is inserted in the tube member 11 with the divided member 15 inserted therein. A contact surface 18a that contacts the inner peripheral surface 11a. Since each extending portion 18 is curved with a curvature substantially equal to the curvature of the inner peripheral surface 11 a of the tube member 11, the contact surface 18 a of each extending portion 18 is set in the same direction along the circumferential direction of the tube member 11. By sliding toward the inner peripheral surface 11 a of the pipe member 11, the dividing member 15 can rotate around the axis of the pipe member 11. Further, in the example shown in the drawing, the elongated portions 18 are spaced apart from each other in a state where the contact surfaces 18 a are in contact with the inner peripheral surface 11 a of the tube member 11 when not inserted into the tube member 11. It is formed on each side edge portion 17 of the flat portion 16 so as to be large. Thereby, in the insertion state of the division member 15 in the pipe member 11, the force which pushes a diameter from the inner side acts on the pipe member 11 from each expansion part 18.

  Between the tube member 11 and the dividing member 15, holding means 22 is provided for holding the dividing member at a desired rotational position. In the illustrated example, the holding means 22 includes a plurality of protrusions 23 formed at equal intervals along the circumferential direction on the inner peripheral surface 11 a of the tube member 11, and the extending portions 18 of the dividing member 15. The contact surface 18 a is formed with a plurality of recesses 24 that can be engaged with the protrusions 23.

  Each protrusion 23 protrudes from the inner peripheral surface 11 a of the tube member 11 toward the inside of the tube member 11, and extends parallel to each other along the longitudinal direction of the tube member 11. Each recess 24 is formed on the contact surface 18a of each extension 18 along the extension direction of each extension 18 with an interval equal to the interval between the projections 23. The members 15 extend parallel to each other along the longitudinal direction of the member 15. Since the interval between the projections 23 and the interval between the recesses 24 are equal, the rotational position of the dividing member 15 can be adjusted for each interval between the projections 23.

  When the dividing member 15 is installed in the pipe member 11, the extending portions 18 of the dividing member 15 are bent in a direction approaching each other, and are formed on the inner peripheral surface 11 a of the tube member 11 in the concave portions 24 of the extending portions 18. By engaging each protrusion 23 and pushing the dividing member 15 into the tube member 11, the dividing member 15 is inserted into the tube member 11. At this time, since each recess 24 and each projection 23 are formed so as to be parallel to each other as described above, each projection 23 is inserted when the split member 15 is inserted into the tube member 11. The divided member 15 can be easily inserted into the pipe member 11 by guiding the engaged recesses 24 along the protrusions 23. When a rotational force that rotates the divided member around the axis of the tube member 11 is applied to the divided member 15 in a state where each projection 23 is engaged with each recessed portion 24, the rotational force is engaged with each recessed portion 24. Since it is received by each protrusion 23, the rotation of the split member 15 around the axis of the tube member 11 is prevented. As a result, the split member 15 is held at the rotational position where the engaging portions 23 are engaged with the concave portions 24 thereof.

  When each drawing cable 14 accommodated in the drawing cable accommodating portion 20 in the pipe member 11 is drawn into the building, as shown in FIG. 2, a surface 16 a located on the other side of the flat portion 16 of the dividing member 15. The rotation position of the dividing member 15 is adjusted in advance so that the direction of the pull-in cable 14 from the pipe member 11 to the building is directed.

  Next, the opening 25 for taking out each drawing cable 14 from the inside of the pipe member 11 is formed in the pipe member 11 at a position corresponding to the drawing direction of the drawing cable 14. At this time, as described above, since the rotation position of the dividing member 15 is adjusted in advance according to the pulling direction, the pulling cable housing portion 20 in the pipe member 11 is formed by the opening 25 by the formation of the opening 25. The member 11 is opened outward. Thereby, it becomes possible to take out each drawing cable 14 from the inside of the drawing cable housing portion 20 through the opening 25.

  Thereafter, in the illustrated example, a branch pipe 26 that branches from the pipe member 11 and extends from the pipe member to the building is attached to the pipe member so as to open into the pipe member 11 through the opening 25, and each drawing cable 14 is drawn. It draws into the building through the inside of the branch pipe 26 from the cable housing portion 20 for use. Thereby, drawing of each cable 14 for drawing in to a building is completed.

  According to the present embodiment, as described above, the pipe member 11 for accommodating the main line cable 13 and the lead-in cable accommodating portion 20 provided in the pipe member for accommodating the lead-in cable 14 are provided. A holding means 22 for holding the divided member at a desired rotational position is provided between the divided member 15 that divides the inside of the pipe member into at least two parts to be defined in the pipe member 11. Therefore, the pipe member 11 is divided into the pipe member 11 at a rotation position at which the pull-out cable 14 can be taken out from the pipe member 11 through the opening 25 formed in accordance with the drawing direction of the drawing cable 14. The member 15 can be held. As a result, when the drawing cable 14 is drawn into the building, the drawing cable can be properly taken out from the inside of the pipe member 11 through the opening 25.

  Further, as described above, the holding means 22 includes a plurality of protrusions 23 formed at equal intervals along the circumferential direction on the inner peripheral surface 11 a of the tube member 11, and each extending portion of the dividing member 15. The contact surfaces 18a of the 18 are formed with a plurality of recesses 24 that are formed along the extension direction of the extending portions 18 at intervals equal to the intervals between the protruding portions 23 and engageable with the protruding portions 23. Therefore, the rotation position of the dividing member 15 can be adjusted for each interval between the protrusions 23. Thereby, the rotation position of the dividing member 15 can be easily and accurately aligned with the rotation position corresponding to the opening 25 formed in the tube member 11 according to the drawing direction of the drawing cable 14.

  Furthermore, as described above, the holding means 22 includes the protrusions 23 formed on the inner peripheral surface 11 a of the tube member 11 and the recesses 24 formed on the contact surfaces 18 a of the extending portions 18 of the dividing member 15. Therefore, the rotation position of the dividing member 15 can be held with a simple structure.

  Further, as described above, each of the extending portions 18 of the dividing member 15 is an elastically deformable leaf spring for applying an elastic force to the tube member 11 in the direction of expanding the diameter of the tube member from the inside thereof. Since it consists of members, when an elastic force acts on the pipe member 11 from each extension part 18, a reaction force is applied to the flat part 16 of the split member 15 from the pipe member 11 via each extension part 18. It acts as a compressive force compressing from both sides. Thereby, shakiness of the division member 15 in each pipe member 11 can be prevented.

  Further, as described above, each side edge portion 17 of the flat surface portion 16 has an obtuse angle with respect to the other side of the flat surface portion 16 so that the angle formed with the tangent line at the contact point with the inner peripheral surface 11a of the tube member 11 is obtuse. When the respective retracting cables 14 accommodated in the retractable cable accommodating portion 20 defined on the other side of the planar portion 16 in the pipe member 11 are drawn into the building, the planar portion 16 is inclined toward the building. And it is prevented that each cable 14 for drawing-in is pinched | interposed into the corner part prescribed | regulated by the internal peripheral surface 11a of the pipe member 11. As shown in FIG. Thereby, when each drawing cable 14 is drawn into the building from the inside of the pipe member 11, damage to each drawing cable due to the drawing cable 14 being sandwiched between the corners can be surely prevented.

  In the present embodiment, the example in which the dividing member 15 is formed separately from the tube member 11 is shown, but instead, the dividing member 15 can be formed integrally with the tube member 11.

  Further, in the present embodiment, the example in which the dividing member 15 is configured by the dividing member that divides the pipe member 11 into two in the vertical direction when the inside of the pipe member 11 is seen in the cross section of the pipe member is shown. For example, a dividing member that divides the pipe member 11 into the upper and lower sides and the left and right sides when the inside of the pipe member 11 is viewed in a cross section of the pipe member can be applied to the present invention.

  Furthermore, in the present embodiment, the recesses 24 are formed in the extended portions 18 of the split member 15, and the protrusions 23 that can be engaged with the recesses 24 are formed on the inner peripheral surface 11 a of the tube member 11. However, instead of this, it is possible to form the protrusions 23 on the elongated portions 18 of the dividing member 15 and to form the recesses 24 on the inner peripheral surface 11 a of the tube member 11.

  Further, in the present embodiment, the example in which the present invention is applied to the pipe structure 10 that guides the communication cable 12 that is simply buried under the road surface in the ground is shown. The present invention can be applied to a pipe structure using a well-known common wire groove. In this case, the dividing member 15 according to the present invention can be provided on the pipe member that guides the trunk cable 13 and the lead-in cable 14 that extend in the ground from the electric wire joint groove embedded under the road surface.

  Furthermore, in the present embodiment, the example in which the present invention is applied to the conduit structure 10 for guiding the communication cable 12 in the ground has been shown, but instead, for example, for guiding the power cable in the ground. The present invention can be applied to a pipe line structure.

It is a cross-sectional view schematically showing a pipeline structure according to the present invention. It is a cross-sectional view which shows roughly the state which adjusted the rotation position of the division member based on this invention according to the drawing-in direction of the cable for drawing-in.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pipe structure 11 Pipe member 11a Inner peripheral surface 13 Trunk cable 14 Pull-in cable 15 Dividing member 16 Plane part 17 Side edge part 18 Extension part 20 Storage part (retraction cable storage part)
22 Holding means 23 Projection 24 Recess

Claims (1)

To accommodate the trunk cable under the road surface of the road, the trunk cable is accommodated, and a cylindrical pipe member embedded under the road surface;
The pipe member is provided so as to extend along the longitudinal direction of the pipe member and to be rotatable around the axis of the pipe member, and accommodates a lead-in cable branched from the trunk cable and drawn into a building A dividing member that divides the inside of the pipe member into at least two in order to define an accommodating portion for carrying out in the pipe member ,
Before Symbol dividing member is a plate-like which is inserted across the cross-section of the tube member to the inside of the pipe member so as to divide into two the interior of the pipe member vertically as viewed in cross-section of the tube member And a pair of extending portions extending along the inner peripheral surface of the pipe member from one side edge of the flat portion toward one side of the flat portion,
As a holding means for retaining said dividing member at its desired rotational position, a plurality of protrusions formed at regular intervals from each other before along the circumferential direction on the inner peripheral surface of Kikan member, wherein Each of the extending portions is formed on the surface of the tube member facing the inner peripheral surface with an interval equal to the interval between the protruding portions along the extending direction of the extending portions. A conduit structure comprising a plurality of recesses that can be joined together .

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