JP4579114B2 - 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).

  When embedding each cable under the road surface, each trunk cable is accommodated one by one in a plurality of pipe members embedded under the road surface at a predetermined interval from each other. They are housed together in a single pipe member buried below so that they can be drawn into the building. Thereby, each cable can be protected from, for example, groundwater.

  However, in such a communication cable duct structure, since a plurality of trunk cables are individually housed in each pipe member and buried under the road surface of the road, all cables are buried under the road surface. In the state, since the space under the road surface is largely occupied in the width direction by the arrangement of each cable, the pipe structure can be applied to a main highway having a relatively large width dimension such as a national road. It is difficult to apply the pipe structure to a road having a relatively small width, such as a road provided in a residential area or a shopping street.

In view of this, there has been proposed a pipe structure in which the lead-in cables are collectively accommodated in a single pipe member, and further, the trunk cable is collectively accommodated in a single pipe member. According to this pipe line structure, the proportion of each cable occupying the space under the road surface when each cable is embedded under the road surface of the road is compared with the case where the main line cables are housed in different pipe members one by one. Can be reduced. Thereby, for example, each cable can be embedded under the road surface of a road having a relatively small width dimension such as a road provided in a residential area, a shopping street, or the like.
JP 2004-120956 (Page 4-6, FIG. 6)

  However, in the future, if the undergrounding of communication cables further progresses, it will be necessary to embed a trunk cable and a lead-in cable below the road surface of a narrow road with a smaller width dimension. Further downsizing of the pipe structure is required.

  Therefore, an object of the present invention is to provide a pipeline structure that can cope with narrow roads.

In order to solve the above problems, the present invention provides a communication cable having a trunk cable, and a communication cable that is branched from the trunk cable and drawn into a building, so that the communication cable is guided under a road surface. A pipe member that is accommodated and buried under the road surface, and is disposed in the pipe member so as to extend along a longitudinal direction of the pipe member, and the trunk cable and the lead-in are provided in the pipe member. A dividing member is provided for dividing the inside of the pipe member into at least two parts so as to separate and accommodate the cables for use.

Further, in the present invention according to the above-mentioned invention, the dividing member is arranged so that the inside of the tube member is divided into two in the vertical direction when the inside of the tube member is viewed in a cross section of the tube member. A plate-like plane portion inserted across the plane, and extending from each side edge of the plane portion toward one side of the plane portion, and pushing the diameter of the tube member from the inside to the tube member It has a pair of elastically deformable leaf springs for applying an elastic force in the spreading direction.

Further, the present invention is the above invention, wherein the tube member has a circular cross section, and the divided member is disposed between the tube member and the divided member within the tube member. An anti-rotation means for preventing rotation around the axis is provided.

The present invention, in the above invention, the rotation preventing means includes a recess formed in said surface opposite to said inner peripheral surface of the pipe member of the plate spring portions of the divided member, the pipe member It is provided on the inner peripheral surface so as to protrude from the inner peripheral surface to the inside of the tube member, and a protrusion that can be engaged with the concave portion of each leaf spring portion.

Further, the present invention is the above invention, wherein the rotation preventing means is provided on the inner peripheral surface of the pipe member near the side edge portions of the flat portion of the divided member or at the tip of each leaf spring portion. It is formed so as to protrude from the inner peripheral surface toward the inside of the tube member in the vicinity, and can be engaged with each side edge portion of the flat portion of the divided member or the tip of each leaf spring portion. A pair of engaging protrusions are provided.

Furthermore, the present invention is the above-described invention, wherein the rotation preventing means is arranged from one side edge portion of the flat surface portion of the divided member toward the other side edge portion , or of one of the leaf spring portions. An arc-shaped member is provided that is fixed to the inner peripheral surface so as to extend along the inner peripheral surface of the pipe member from the front end toward the front end of the other leaf spring portion.

And this invention , in said invention, the said pipe member has a circular cross section, and is connected to the other pipe member via the pipe joint, and the said pipe joint is each said pipe member at both ends. The joint body is provided with an anti-rotation means for preventing the divided member from rotating around the axis of each pipe member. It is characterized by that.

Further, the present invention is the above invention, wherein the rotation preventing means is provided on an inner peripheral surface of the joint main body in the vicinity of the side edge portions of the flat portion of the split member or at the tip of each leaf spring portion. It is formed in the vicinity so as to protrude from the inner peripheral surface of the joint body toward the inside of the joint body, and the side edges of the flat portion of the divided member , or the tips of the leaf springs. And a pair of engaging protrusions that can be engaged with each other.

Furthermore, the present invention is the above-described invention, wherein the rotation preventing means is arranged from one side edge portion of the flat surface portion of the divided member toward the other side edge portion , or of one of the leaf spring portions. An arc-shaped member fixed to the inner peripheral surface is provided so as to extend along the inner peripheral surface of the joint body from the front end toward the front end of the other leaf spring portion.

Further, in the present invention according to the above invention, the rotation preventing means is inserted into the joint main body with an axis line coinciding with the axis of the joint main body, allowing the split member to be inserted, and the joint main body A recess formed on the inner peripheral surface of the cylindrical member, a protrusion formed on the outer peripheral surface of the cylindrical member and engageable with the concave portion, and each of the planar portions of the split member on the inner peripheral surface of the cylindrical member. It is formed so as to protrude from the inner peripheral surface of the cylindrical member toward the inside of the cylindrical member in the vicinity of the side edge portion or in the vicinity of the tip of each leaf spring portion, and wherein each side edge, or characterized by comprising the and said tip engaging projections pair engageable in the of the plate spring portions.

Further, according to the present invention , in the above invention, the divided member is formed with a plurality of cutting portions for cutting the divided member along the width direction at predetermined intervals in the longitudinal direction of the divided member. And connecting means for releasably connecting the adjacent parts to each other is provided between the parts of the divided member separated by the formation of the cutting parts.

Furthermore, the present invention is the above invention, wherein the connecting means is directed from one of the end portions facing each other in the longitudinal direction of the respective portions of the divided member toward the portion adjacent to the end portion. A connecting member that extends, a hole formed in the connecting member, and an engaging portion that protrudes from the end of the other portion of each of the portions and engages with the hole of the connecting member. It is characterized by providing.

And this invention is characterized by the above-mentioned invention. WHEREIN: The said hole is a long hole extended along the expansion | extension direction of the said connection member, It is characterized by the above-mentioned.

According to the present invention , the pipe member embedded under the road surface is disposed so as to extend along the longitudinal direction of the pipe member, and the trunk cable and the lead-in cable are separated into the pipe member, respectively. Since the dividing member for dividing the inside of the pipe member into at least two parts is provided so as to be accommodated, the main cable and the retracting cable are accommodated in a single pipe member. As a result, each cable occupies the space below the road surface when each cable is embedded under the road surface of the road, compared to the case where the main line cable and the lead-in cable are accommodated in different pipe members as in the prior art. The ratio can be further reduced.

  Therefore, since the conduit structure for guiding each main cable and each lead-in cable under the road surface can be made more compact than before, for example, than a road provided in a residential area, a shopping street, etc. Furthermore, even when it is necessary to embed each trunk line cable and each lead-in cable under the road surface of a narrow road with a small width dimension, each trunk line cable and each lead-in cable can be easily buried under the road surface. .

Further , according to the present invention , the split member is inserted into the pipe member so as to cross the cross section of the pipe member so as to divide the pipe member into two in the vertical direction when the cross section of the pipe member is viewed in the cross section. The plate-like flat surface portion and each side edge portion of the flat surface portion extend toward one side of the flat surface portion, and an elastic force is exerted on the tube member in the direction of expanding the diameter of the tube member from the inside. A pair of elastically deformable leaf springs for causing the flat members to react with each other through the leaf springs from the tube members when an elastic force acts on the tube members from the leaf springs. Acts as a compressive force that compresses the flat portion from both sides thereof. Thereby, the shakiness of the division member in each pipe member can be prevented.

Further, according to the present invention , the tube member has a circular cross section, and between the tube member and the divided member, the divided member rotates within the tube member about the axis of the tube member. For example, even when each cable is moved in-course within the pipe member at a curved portion of the pipe member, the movement of the split member around the axis of the pipe member is achieved because the rotation prevention means is provided. Is prevented from rotating. Thus, when the drawing cable is drawn into the building from the inside of the pipe member, for example, when the opening for taking out the drawing cable from the inside of the pipe member is formed in the curved portion of the pipe member, the rotated dividing member is formed of the opening. It is possible to reliably prevent obstruction.

According to the present invention , the rotation preventing means is provided with a recess formed on the surface of the plate spring portion of each split member facing the inner peripheral surface of the tube member, and the inner peripheral surface of the tube member from the inner peripheral surface. It can be configured by projecting inwardly projecting from the pipe member and engaging with the recess of each leaf spring. Thereby, rotation of the division member around the axis line of a pipe member can be prevented with a simple structure.

Further , according to the present invention , the rotation preventing means is disposed on the inner peripheral surface of the pipe member from the inner peripheral surface in the vicinity of each side edge portion of the flat portion of the split member or in the vicinity of the tip of each leaf spring portion. It can be comprised by a pair of engaging protrusion which is formed so that it may protrude toward the direction and can be engaged with each side edge part of the plane part of a division member, or the front-end | tip of each leaf | plate spring part. Thereby, rotation of the division member around the axis line of a pipe member can be prevented with a simple structure.

Further, according to the present invention , the rotation preventing means is provided from one side edge of the flat portion of the split member toward the other side edge or from the tip of one leaf spring to the tip of the other leaf spring. It can comprise by the arc-shaped member fixed to this inner peripheral surface so that it may extend along the inner peripheral surface of a pipe member. In this case, when a rotational force that rotates the divided member around the axis of the tube member is applied to the divided member, the rotational force acts as a compressive force that compresses the arc-shaped member in the extending direction. Thereby, rotation of the division member around the axis of the tube member is prevented.

  In addition, since an arc member formed separately from the pipe member can be retrofitted to the existing pipe member, a pipe provided with anti-rotation means as in the case where the anti-rotation means is provided integrally with the pipe member. There is no need to manufacture a new molding die for molding the member. Thereby, the increase in manufacturing cost can be suppressed reliably. In addition, since an arc member can be retrofitted to an existing pipe member, for example, even when it is necessary to urgently perform piping using a divided member at a construction site, the arc member is attached to the pipe member prepared at the construction site. Thereby, the pipe member which has a rotation prevention function of a division member can be easily formed in a construction site.

  Furthermore, when the rotation preventing means is formed integrally with the pipe member, for example, when it is necessary to bend the pipe member according to the piping direction, the pipe member is inserted into the pipe member in a state of being embedded under the road surface. Although it is necessary to perform bending while confirming the formation position of the anti-rotation means so that the plate thickness direction of the flat portion of the divided member is always held in the vertical direction, it takes time and effort. For example, as described above, since the arc-shaped member is formed separately from the tube member, the arc-shaped member can be provided on the tube member after bending the tube member. The pipe member can be easily bent as compared with the case where it is formed integrally with the member.

According to the present invention , the pipe member has a circular cross section and is connected to another pipe member via a pipe joint, and the pipe joint is inserted with the ends of the pipe members at both ends. Since the joint body is provided with anti-rotation means for preventing the divided member from rotating around the axis of each pipe member, for example, a curved portion of the pipe member. Thus, even when each cable moves in-course within the pipe member, this movement prevents the split member from rotating around the axis of the pipe member. Thus, when the drawing cable is drawn into the building from the inside of the pipe member, for example, when the opening for taking out the drawing cable from the inside of the pipe member is formed in the curved portion of the pipe member, the rotated dividing member is formed of the opening. It is possible to reliably prevent obstruction.

  In general, since the tube member is formed by extrusion molding, when the rotation preventing means is integrally formed on the tube member to prevent rotation of the divided member, the tube member provided with the rotation preventing means is formed. There is a need to newly manufacture a molding die, which may increase the manufacturing cost.

  On the other hand, since the pipe joint is generally formed by injection molding, when the rotation prevention means is provided in the pipe joint, a so-called nesting for forming the rotation prevention means in the pipe joint is an existing molding die. By providing the pipe joint, it is possible to inexpensively form the pipe joint provided with the rotation preventing means without newly manufacturing a molding die. As a result, the manufacturing cost can be reliably reduced as compared with the case where the rotation preventing means is integrally formed on the pipe member.

  Further, when it is necessary to bend the pipe member in accordance with the piping direction, if the pipe member is provided with rotation prevention means, the rotation prevention means may be damaged when the pipe member is bent. Moreover, it is necessary to bend the pipe member so that the plate thickness direction of the flat portion of the divided member inserted into the pipe member is always kept in the vertical direction with the pipe member embedded in the road surface. Therefore, even if the pipe member can be bent without causing damage to the rotation preventing means, for example, as a pipe member for bending a pipe member that has been bent in order to bend the pipe direction to the right, to the left It cannot be used, and the bent pipe member is not versatile.

  On the other hand, according to the present invention, as described above, by providing the joint main body with the rotation preventing means, it is possible to prevent the split member from rotating without performing processing for preventing the split member from rotating on the pipe member. Therefore, even when it is necessary to bend the pipe member in accordance with the piping direction, the pipe member can be bent without causing damage to the rotation prevention means. For example, the pipe direction is bent to the right. The bent pipe member can be used when the pipe direction is bent to the left, and the bent pipe member can have versatility.

Further , according to the present invention , the rotation preventing means is connected from the inner peripheral surface of the joint main body to the inner peripheral surface of the joint main body near each side edge of the flat portion of the split member or near the tip of each leaf spring part. It is formed so as to protrude toward the inside of the main body, and can be constituted by a pair of engaging protrusions that can be engaged with each side edge portion of the flat portion of the dividing member or the tip of each leaf spring portion. Thereby, rotation of the division member around the axis line of a pipe member can be prevented with a simple structure.

Further, according to the present invention , the rotation preventing means is provided from one side edge portion of the flat portion of the dividing member toward the other side edge portion or from the tip of one leaf spring portion to the tip of the other leaf spring portion. Since the arc-shaped member fixed to the inner peripheral surface so as to extend along the inner peripheral surface of the joint body is provided, a rotational force that rotates the divided member around the axis of the pipe member is applied to the divided member. At that time, the rotational force acts as a compressive force that compresses the arcuate member in its extending direction. Thereby, rotation of the division member around the axis of the tube member is prevented.

  In addition, since an arc member formed separately from the joint body can be retrofitted to the joint body of an existing pipe joint, for example, even when it is necessary to urgently perform piping using divided members at the construction site By attaching an arcuate member to a pipe joint prepared at the construction site, a pipe joint having a function of preventing rotation of the split member can be easily formed at the construction site.

And according to the present invention , on the outer peripheral surface of the cylindrical member formed on the inner peripheral surface is a pair of engaging projections that can be engaged with each side edge of the flat portion of the split member or the tip of each leaf spring portion. Since the protrusions that can be engaged with the recesses formed on the inner peripheral surface of the joint body are formed, by engaging the protrusions of the tube member with the recesses of the joint body, the tube member is moved around its axis. It can be easily fixed in the joint body so as not to rotate.

Further , according to the present invention , the dividing member is formed with a plurality of cutting portions for cutting the dividing member along the width direction at predetermined intervals in the longitudinal direction of the dividing member. Between the portions of the divided member separated by the formation of the portion, connecting means for releasably connecting the adjacent portions to each other is provided, which corresponds to the desired length of the divided member. By releasing the connecting means at the position or by connecting the part of the dividing member to the other part via the connecting means, for example, the length dimension of the dividing member according to the length dimension of the tube member Can be adjusted.

Further, according to the present invention , the connecting means includes a connecting member that extends from one end of the split member in the longitudinal direction of each of the portions of the divided member toward the adjacent portion. The connecting member is composed of a hole formed in the connecting member and an engaging part that protrudes from the other end of each of the portions and engages with the hole of the connecting member. By engaging the engaging portion with the holes, the respective portions can be coupled to each other so as to be swingable around the engaging portion. Accordingly, by swinging the portions connected to each other via the connecting member, it is possible to easily deflect the divided member constituted by the portions.

And according to this invention , since the hole formed in the connection member is comprised by the long hole extended along the expansion | extension direction of a connection member, the engaging part engaged with this long hole is a long hole. , The distance between the parts can be easily adjusted in a state where the movement of the parts of the dividing member in the width direction is restricted. Thereby, the length dimension of the division member comprised by connecting each said part mutually via a connection member can be finely adjusted.

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

  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 protects the communication cable 12 from, for example, groundwater when the communication cable 12 such as a telephone line is buried under the road surface. Therefore, it has a function as a protective tube that accommodates the communication cable 12.

  As is well known in the art, the communication cable 12 accommodated in the pipe member 11 is branched from a plurality of trunk cables 13 that connect, for example, telephone offices, the trunk cable, and houses or stores (not shown). And a plurality of lead-in cables 14 drawn into the building.

  The pipe member 11 is divided into at least two parts inside the pipe member 11 so that the main cable 13 and the lead-in cable 14 are separately housed in the pipe member 11. A member 15 is provided.

  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 15 which divides | segments up and down into two in the example of illustration seeing the inside of the pipe member 11 in the cross section of this pipe member. 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 11 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 leaf | plate spring part 18 extended toward the one side of the plane part 16 from each side edge part 17 which faces each other.

  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. The plane portion 16 is disposed in the pipe member 11 with the surface 16a located on the other side thereof facing upward, whereby each main line cable is connected to the one side of the plane portion 16 inside the pipe member 11. A trunk cable housing portion 19 for housing 13 is defined, and a retracting cable housing portion 20 for housing each pulling cable 14 is defined on the other side of the flat surface portion 16. A plurality of sheath tubes 21 into which each main line cable 13 is inserted one by one are accommodated in the main line cable accommodating portion 19.

  Each leaf spring portion 18 is curved with a curvature substantially equal to the curvature of the inner peripheral surface 11a of the pipe member 11 along the extending direction. Thereby, in the insertion state of the division member 15 in the pipe member 11, each leaf | plate spring part 18 closely_contact | adheres to the internal peripheral surface 11a of the pipe member 11. FIG. Each leaf spring portion 18 is not inserted into the tube member 11, and each side edge of the plane portion 16 is arranged such that the interval between the leaf spring portions 18 is larger than the state in which the leaf spring portions 18 are in close contact with the inner peripheral surface 11 a of the tube member 11. It is formed in the part 17. As a result, in a state where the divided member 15 is inserted into the tube member 11, a force for expanding the diameter from the inside acts on the tube member 11 from each leaf spring portion 18.

  Between the tube member 11 and the split member 15, a rotation preventing means 22 for preventing the split member from rotating around the axis of the tube member 11 is provided.

  In the illustrated example, the rotation preventing means 22 includes a pair of recesses 23 formed on a surface 18 a that is in close contact with the inner peripheral surface 11 a of the tube member 11 of each leaf spring portion 18 of the split member 15, and the inner periphery of the tube member 11. A pair of protrusions 24 that protrude from the inner peripheral surface of the surface 11 a toward the inside of the pipe member 11 and can be engaged with the recesses 23 of the leaf spring portions 18 are formed. In the illustrated example, each recess 23 extends in parallel with each other along the longitudinal direction of the dividing member 15 on the surface of each leaf spring portion 18, and each protrusion 24 is a tube member in the illustrated example. 11 extend in parallel with each other along the longitudinal direction.

  When the split member 15 is installed in the pipe member 11, the plate spring portions 18 of the split member 15 are bent in a direction approaching each other, and formed on the inner peripheral surface 11 a of the pipe member 11 in the concave portions 23 of the plate spring portions 18. The divided members 15 are inserted into the tube member 11 by engaging the projecting portions 24 and pushing the divided member 15 into the tube member 11. At this time, since each concave portion 23 and each projection portion 24 are formed so as to be parallel to each other as described above, each projection portion 24 is formed when the dividing 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 23 along the projections 24. Further, for example, by marking the outer peripheral surface of the tube member 11 to indicate the position where each projection 24 is formed, the recesses 23 to the projections 24 are inserted into the projection 24 when the divided member 15 is inserted into the tube member 11. It is possible to easily align the engagement positions without having to search them by hand.

  Further, as shown in FIGS. 2 (a) and 2 (b), the dividing member 15 has side edges extending from the center in the width direction of the plane portion 16 to opposite directions in the width direction of the plane portion. A set of slits 25 extending toward the portion 17 and extending along the extending direction of each leaf spring portion 18 and opening to the distal end 18b of each leaf spring portion 18 along the longitudinal direction of the dividing member 15 etc. It is formed at intervals.

  According to the present embodiment, as described above, it is arranged inside the pipe member 11 embedded under the road surface so as to extend along the longitudinal direction of the pipe member, and each trunk cable is placed inside the pipe member. 13 and each drawing cable 14 are provided with a dividing member 15 for dividing the inside of the pipe member 11 into at least two parts so as to be separated and accommodated. Therefore, the trunk cable 13 and the drawing cable 14 are It is accommodated in a single tube member 11. Thereby, compared with the case where the main line cable 13 and the lead-in cable 14 are accommodated in different pipe members as in the prior art, when the cables are embedded under the road surface of the road, the cables are provided with a space under the road surface. The proportion occupied can be further reduced.

  Accordingly, the conduit structure 10 for guiding the trunk cables 13 and the lead-in cables 14 under the road surface can be made more compact than conventional ones. For example, it is provided in a residential area or a shopping street. Even when it is necessary to embed each main line cable 13 and each lead-in cable 14 below the road surface of a narrow road having a smaller width than the road, each main line cable 13 and each lead-in cable 14 are below the road surface. Can be embedded easily.

  Further, as described above, the elastic deformation for applying the elastic force to the side edge portions 17 of the flat portion 16 of the dividing member 15 in the direction of expanding the diameter of the tube member from the inside to the tube member 11. Since a pair of possible leaf springs 18 are provided, when an elastic force is applied from each leaf spring 18 to the tube member 11, the flat portion 16 is connected to the plate member 11 via the leaf spring 18. The reaction force acts as a compressive force for compressing the flat portion 16 from both sides. Thereby, shakiness of the division member 15 in each pipe member 11 can be prevented. Further, as described above, each leaf spring portion 18 is in close contact with the inner peripheral surface 11 a of the tube member 11 in a state in which the divided member 15 is inserted into the tube member 11, and thus the tube member 11 of each leaf spring portion 18. Since the frictional force generated between the surface facing the inner peripheral surface 11a of the tube member 11 and the inner peripheral surface 11a of the tube member 11 is increased, the force for rotating the divided member around the axis of the tube member 11 is exerted on the divided member 15. When it acts, it can suppress reliably that the division member 15 rotates around the axis line of the pipe member 11. FIG.

  Furthermore, as described above, each side edge portion 17 of the flat surface portion 16 is in contact with the inner peripheral surface 11 a of the tube member 11 in a state where the flat surface portion 16 is inserted into the tube member 11.

  When gaps are formed between the side edge portions 17 of the flat portion 16 and the inner peripheral surface 11a of the pipe member 11, when the drawing cables 14 are drawn into the building, the drawing cables 14 are sandwiched in the gaps. It may be lost. For this reason, the frictional force generated between each side edge portion 17 of the flat portion 16 and the inner peripheral surface 11a of the pipe member 11 and each drawing cable 14 becomes large, and the large pulling force causes damage to each drawing cable 14. Will occur.

  On the other hand, according to the present embodiment, as described above, each side edge portion 17 of the flat surface portion 16 is formed on the inner peripheral surface 11a of the tube member 11 with the flat surface portion 16 being inserted into the tube member 11, respectively. Because of the contact, when each drawing cable 14 accommodated in one of the two spaces formed in the pipe member 11 is drawn into the building by the arrangement of the dividing member 15 in the pipe member 11. Further, in the state where the flat portion 16 is inserted into the tube member 11, each drawing cable 14 is prevented from being caught in the gap between each side edge portion 17 of the flat portion and the inner peripheral surface 11 a of the tube member 11. . Thereby, it is possible to surely prevent the respective pull-in cables from being damaged by the respective pull-in cables 14 being sandwiched in the gaps between the respective side edge portions 17 of the plane portion 16 and the inner peripheral surface 11a of the tube member 11. .

  Further, as described above, each side edge portion 17 of the flat surface portion 16 is moved to the other side of the flat surface portion 16 so that the angle formed with the tangent at the contact point with the inner peripheral surface 11a of the tube member 11 becomes an obtuse angle. When the respective retracting cables 14 are accommodated on the other side of the plane portion 16 in the pipe member 11, the respective retracting cables 14 are drawn from the tubular member 11 into the building. Each drawing cable 14 is prevented from being sandwiched between corners defined by the flat portion 16 and the inner peripheral surface 11a of the pipe member 11. 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.

  Further, as described above, the rotation preventing means 22 is provided between the tube member 11 and the divided member 15 to prevent the divided member 15 from rotating around the axis of the tube member in the tube member 11. It has been.

  For example, when the communication cable 12 is accommodated in the tubular member 11 having a curved portion, each trunk cable 13 and each retracting cable 14 move to the in-course in the tubular member 11 at the curved portion. The member 15 rotates around the axis of the pipe member 11. For this reason, when each drawing cable 14 is drawn into the building from the inside of the pipe member 11, for example, when the opening for taking out each drawing cable 14 from the inside of the pipe member 11 is formed in the curved portion of the pipe member 11, the rotation is performed. The divided member 15 thus obstructs the formation of the opening.

  On the other hand, according to the present embodiment, as described above, the rotation preventing means 22 for preventing the dividing member 15 from rotating around the axis of the tube member 11 in the tube member 11 is provided. Therefore, for example, even when the cables 13 and 14 move to the in-course in the tubular member 11 at the curved portion of the tubular member 11, the dividing member 15 can rotate around the axis of the tubular member 11 by this movement. Is prevented. Thereby, when each drawing cable 14 was drawn into the building from the inside of the pipe member 11, it was rotated when an opening for taking out each drawing cable 14 from the inside of the pipe member 11 was formed in the curved portion of the pipe member 11. It is possible to reliably prevent the dividing member 15 from obstructing the formation of the opening.

  In addition, as described above, the rotation preventing means 22 includes the recess 23 formed on the surface of each leaf spring portion 18 of the dividing member 15 facing the inner peripheral surface 11 a of the tube member 11, and the inner peripheral surface of the tube member 11. 11a is formed of a projecting portion 24 that protrudes inward of the tube member 11 from the inner peripheral surface and engages with the recessed portion 23 of each leaf spring portion 18, so that the divided member around the axis of the tube member 11 is formed. 15 rotations can be prevented with a simple structure.

  Further, as described above, the dividing member 15 extends from the center in the width direction of the plane portion 16 toward each side edge portion 17 in a direction opposite to each other in the width direction of the plane portion. Since a set of slits 25 extending along the extending direction of the leaf spring portion 18 and opening to the tip end 18b of each leaf spring portion are formed at predetermined intervals along the longitudinal direction of the dividing member 15. The dividing member 15 can be bent by changing the width of each slit 25. Thereby, for example, when the split member 15 is inserted into the tube member 11 having a curved portion, the split member 15 can be bent and deformed with a curvature corresponding to the curvature of the curved portion. The split member can be reliably prevented from being damaged by the bending force that the split member receives from the pipe member 11 when the split member 15 is inserted into the tube.

  In the present embodiment, an example in which a set of slits 25 is formed in the dividing member 15 at predetermined intervals along the longitudinal direction of the dividing member 15 is shown, but instead of this, FIG. And as shown to (b), several dividing part 26 which cut | disconnects this division member to the division member 15 along the direction orthogonal to the expansion | extension direction, ie, the width direction, is mutually predetermined in the longitudinal direction of the division member 15. Connecting means 28 for releasably connecting the adjacent portions to each other can be provided between the portions 27 of the divided member 15 formed at intervals and separated by forming the cutting portions 26.

  In the example shown in the drawing, the connecting means 28 is a connecting member 29 that extends from one end 27a to the adjacent portion 27 among the ends facing each other in the longitudinal direction of the portions 27 of the split member 15. A pair of holes 30 formed in the connecting member, and a pair of engagement members provided on the other end 27b of each portion 27 so as to protrude from the end and engageable with each hole 30 of the connecting member 29. It is comprised with the joint part 31. FIG.

  In the illustrated example, the connecting member 29 is a plate member having a rectangular plane, and is integrally formed with the portions 27 of the dividing member 15. Further, in the illustrated example, the connecting member 29 dives from the end surface 16b of the end portion of the flat portion 16 of each portion 27 to one side of the adjacent flat portion 16 of the portion 27, that is, the trunk cable housing portion 19 side. Furthermore, it extends along the flat portion 16 of the adjacent portion 27 in parallel with the flat portion.

  In the example shown in the drawing, each hole 30 formed in the connecting member 29 is formed with a long hole 30 formed at intervals from each other along the width direction of the connecting member 29 and extending along the extending direction of the connecting member 29. Has been.

  In the example shown in the drawing, each engaging portion 31 is configured by a well-known rivet. From the surface 16c on the main cable housing portion 19 side to the flat portion 16 of each portion 27, the main cable is connected. It is provided so as to protrude into the accommodating portion 19.

  According to the example shown in FIG. 3, as described above, the plurality of cutting portions 26 that cut the divided member along the width direction of the dividing member 15 are spaced apart from each other at a predetermined interval in the longitudinal direction of the dividing member 15. And connecting means 28 for releasably connecting the adjacent portions to each other between the portions 27 of the divided member 15 separated by the formation of the respective cutting portions 26. From this, by releasing the connecting means 28 at a position corresponding to the desired length of the dividing member 15, or by connecting the part 27 of the dividing member 15 to the other part 27 via the connecting means 28. For example, the length dimension of the split member 15 can be adjusted according to the length dimension of the pipe member 11 into which the split member 15 is inserted.

  Further, according to the example shown in FIG. 3, as described above, the pair of holes 30 formed in the connecting member 29 are formed at intervals from each other along the width direction of the connecting member 29. Since each of the engaging portions 31 engaged with each of the long holes 30 is guided along each of the long holes 30, The distance between the portions 27 can be easily adjusted in a state where the movement of the portions 27 in the width direction is restricted. Thereby, the length dimension of the division | segmentation member 15 comprised by connecting each said part 27 mutually through the connection member 29 can be finely adjusted. Further, by shifting the engaging position of each engaging part 31 to each long hole 30 so that the engaging position of each engaging part 31 to each long hole 30 becomes a pair position, the connecting member 29 is moved. Since the respective portions 27 connected to each other can be swung, the dividing member 15 constituted by the respective portions can be easily bent.

  Further, according to the example shown in FIG. 3, as described above, the connecting member 29 is formed on the flat portion 16 of the portion 27 adjacent to the end surface 16 b of the end portion of the flat portion 16 of the portion 27 of the dividing member 15. A state in which each portion 27 is connected to each other via a connecting member 29 because it is dived to the trunk cable housing portion 19 side and extends along the flat portion 16 of the adjacent portion 27 in parallel with the flat portion. Then, a step due to the arrangement of the connecting member 29 does not occur in the cable housing portion 20 for drawing in the tube member 11. Thereby, when the drawing cable 14 is drawn into the building, the drawing cable 14 is not caught by the step generated by the arrangement of the connecting member 29. Therefore, the drawing cable 14 by the drawing cable 14 is caught by the step. Can be prevented from being damaged.

  In the example shown in FIG. 3, the example in which the connecting member 29 is a plate member is shown, but instead, the connecting member 29 can be formed of a flexible material such as rubber. In this case, since the connecting member is formed of a material having flexibility, the connecting member can be easily deformed. Therefore, each of the portions 27 is connected to each other via the connecting member. The divided member 15 can be bent and deformed more greatly.

  In the example shown in FIG. 3, the connecting member 29 is formed integrally with each portion 27 on the end surface of the flat portion 16 of each portion 27 of the dividing member 15. Instead, the connecting member 29 can be formed separately from each portion 27 on the end face 16 b of the end portion of the flat portion 16 of each portion 27. Moreover, although the example in which the connecting member 29 is formed on the end surface 16b of the end portion of the flat portion 16 of each portion 27 has been shown, instead of this, the connecting member 29 is replaced with, for example, the flat portion 16 of each portion 27. It can be formed integrally or separately on the surface 16c on the main cable housing 19 side.

  Further, in the example shown in FIG. 3, the example in which each engaging portion 31 is configured by a rivet is shown. Instead, for example, the trunk cable housing portion of the flat portion 16 of each portion 27 of the dividing member 15 is used. Each engaging portion 31 can be constituted by a hook that protrudes from the surface 16 b on the 19 side into the cable housing portion 19 for the main line and engages with an edge portion of each hole 30 of the connecting member 29.

  In the example shown in FIGS. 1 to 3, the example in which the dividing member 15 is formed separately from the tube member 11 is shown. Instead, the dividing member 15 is formed integrally with the tube member 11. Can do.

  Further, in the example shown in FIGS. 1 to 3, the example in which the dividing member 15 is configured by the dividing member 15 including the flat surface portion 16 and the pair of leaf spring portions 18 is shown. 4A, in addition to the flat planar portion 32 formed separately from the planar portion 16 shown in FIGS. 1 to 3 and the pair of leaf spring portions 18 described above, The split member 15 having a pair of extending portions 33 extending along the inner peripheral surface 11a of the pipe member 11 from each side edge portion 32a toward the other side of the flat portion 16, that is, toward the cable housing portion 20 for drawing in the present invention. Can be applied.

  In addition to the example shown in FIG. 4A, as shown in FIG. 4B, the flat portion 16 shown in FIGS. 1 to 3 is formed separately from a flat flat portion 34 and a pair of leaf springs. In addition to the portion 18, a division that rises from the center in the width direction of the flat portion 34 into the cable housing portion 20 for drawing in the tube member 11 toward the inner peripheral surface 11 a of the tube member 11 and extends along the longitudinal direction of the tube member 11. The dividing member 15 provided with the wall 35 can be applied to the present invention. In this case, since the lead-in cable accommodating portion 20 is further divided into two, for example, the lead-in cables 14 (see FIG. 1) can be further separated and accommodated according to the purpose.

  In addition to the example shown in FIGS. 4A and 4B, as shown in FIG. 4C, in addition to the flat portion 16 and the pair of leaf spring portions 18 shown in FIG. In the present invention, the split member 15 is provided with a pair of support portions 36 that extend in parallel to each other from the central portion in the width direction into the trunk cable housing portion 19 and support each sheath tube 21 in the trunk cable housing portion 19. Can be applied. In this case, since each sheath tube 21 is supported by each support portion 36, it is possible to prevent each sheath tube 21 from moving in-course within the tube member 11 at a curved portion of the tube member 11, for example. it can.

  In the example shown in FIGS. 1 to 3, an example is shown in which one recess 23 of the rotation preventing means 22 is formed in each leaf spring portion 18, but each leaf spring portion 18 is replaced with this. A plurality of recesses 23 can be formed at intervals in the extending direction of each leaf spring portion 18, for example. In this case, a plurality of protrusions 24 can be formed on the inner peripheral surface 11 a of the pipe member 11 at positions corresponding to the respective recesses 23. Moreover, although the recessed part 23 was each formed in each leaf | plate spring part 18 of the division member 15, and the protrusion part 24 which can be engaged with each recessed part 23 was formed in the internal peripheral surface 11a of the pipe member 11, although shown. Instead of this, the protrusions 24 can be formed on the plate spring portions 18 of the dividing member 15, and the recesses 23 can be formed on the inner peripheral surface 11 a of the tube member 11.

  Further, in the example shown in FIGS. 1 to 3, the rotation preventing means 22 includes a pair of recesses 23 formed in each leaf spring portion 18 of the dividing member 15 and a pair formed on the inner peripheral surface 11 a of the tube member 11. However, instead of this, as shown in FIG. 5, the rotation preventing means 22 is directed from the inner peripheral surface 11 a of the tube member 11 to the inside of the tube member 11. It can comprise by a pair of engaging protrusion 37 which protrudes.

  In the example shown in FIG. 5, each engagement protrusion 37 is provided on each inner edge 11 a of the pipe member 11 in the vicinity of each side edge 17 of the flat portion 16 of the divided member 15 inserted into the pipe member 11. It is formed so as to cover the portion 17. The tip of each engagement protrusion 37 has a substantially semicircular cross section. Thereby, each pulling cable 14 (refer to FIG. 1) housed in the pulling cable housing portion 20 can be prevented from being damaged by being caught on the tip of each engaging projection 37. .

  According to the example shown in FIG. 5, when the rotational force that rotates the divided member around the axis of the tube member 11 is applied to the divided member 15, the side edge portions 17 of the planar portion 16 of the divided member 15 are respectively Since it engages with the engagement protrusion 37, the rotation of the split member 15 around the axis of the tube member 11 is prevented. Therefore, the rotation of the split member 15 around the axis of the tube member 11 can be prevented with a simple structure.

  In the example shown in FIG. 5, the tip of each engagement protrusion 37 has an approximately semicircular cross section, but instead, the engagement protrusion has a substantially trapezoidal cross section, for example. Can be applied to the present invention.

  Further, in the example shown in FIG. 5, an example is shown in which both engaging protrusions 37 are formed on the inner peripheral surface 11 a of the pipe member 11 in the vicinity of each side edge portion 17 of the flat portion 16 of the dividing member 15. Instead, although not shown, either one of the engaging protrusions 37 or both engaging protrusions 37 are formed on the inner peripheral surface 11a of the tube member 11 in the vicinity of the tip 18b of each leaf spring portion 18 of the split member 15. Can do.

  Further, instead of the example shown in FIG. 5, as shown in FIG. 6, the rotation preventing means 22 is a tube member that is directed from one side edge 17 to the other side edge 17 of the flat portion 16 of the dividing member 15. 11 can be constituted by a plate-like arc-shaped member 38 fixed to the inner peripheral surface so as to extend along the inner peripheral surface 11a.

  The arc member 38 is formed, for example, by partially cutting a tube member (not shown) whose outer diameter is equal to the inner diameter of the tube member 11, and as shown in FIG. It arrange | positions between these each side edge part so that it may contact | abut to the side edge part 17 and a plate | board thickness direction may correspond to the radial direction of the pipe member 11. FIG. Thus, when a rotational force that rotates the divided member around the axis of the tube member 11 is applied to the divided member 15, the rotational force acts on the arc-shaped member 38 as a compressive force that compresses the arc-shaped member in the extending direction. To do. Thereby, rotation of the division member 15 around the axis line of the pipe member 11 is prevented.

  According to the example shown in FIG. 6, the arc member 38 formed separately from the pipe member 11 can be retrofitted to the existing pipe member 11, so that the rotation preventing means 22 is provided integrally with the pipe member 11. There is no need to manufacture a new molding die for molding the tube member 11 provided with the rotation preventing means 22 as described above. Thereby, the increase in manufacturing cost can be suppressed reliably. Moreover, since the arc-shaped member 38 can be retrofitted to the existing pipe member 11, even when it becomes necessary to urgently perform piping using the dividing member 15 at the construction site, the pipe member 11 prepared at the construction site is used. By attaching the arc member 38, the pipe member 11 having the function of preventing the rotation of the split member 15 can be easily formed at the construction site.

  Furthermore, when the rotation preventing means 22 is formed integrally with the pipe member 11, for example, when it is necessary to bend the pipe member 11 according to the piping direction, the pipe member 11 is embedded in the state below the road surface. Since it is necessary to perform bending while confirming the formation position of the rotation preventing means 22 so that the plate thickness direction of the flat portion 16 of the dividing member 15 inserted therein is always kept in the up-down direction, labor is required. However, according to the present invention, since the arc-shaped member 38 is formed separately from the tube member 11 as described above, the arc-shaped member 38 is bent after the tube member 11 is bent. Therefore, the pipe member 11 can be easily bent as compared with the case where the rotation preventing means 22 is formed integrally with the pipe member 11.

  In the example shown in FIG. 6, the arc-shaped member 38 is arranged between the side edge portions 17 of the flat surface portion 16 of the split member 15, but instead of this, although not shown, the arc-shaped member 38 is Both end faces 38a can be arranged between the two leaf springs 18 so that they abut against the tip 18b of each leaf spring 18 of the split member 15, and between the side edges 17 of the flat part 16 and both leaf springs. An arcuate member 38 can be disposed both between the portions 18.

  Further, in place of the example shown in FIGS. 1 to 6, although not shown, the surface 18 a of each leaf spring portion 18 is bonded to the inner peripheral surface 11 a of the tube member 11 with an adhesive, whereby the divided member 15 is connected to the tube. It can be fixed in the member 11.

  The pipe member 11 shown in FIGS. 1 to 3 can be connected to another pipe member 40 via a pipe joint 39 as shown in FIG. In this case, the pipe joint 39 can be provided with a rotation preventing means 22 for preventing the rotation of the split member 15 around the axis of the pipe member 11.

  In the example shown in FIG. 7, the pipe joint 39 includes a tubular joint body 41. The joint body 41 has insertion end portions 41a into which the end portions 11b and 40a of the pipe members 11 and 40 are inserted at both ends thereof. The pipe members 11 and 40 and the joint body 41 are joined to each other by rubber ring joining and adhesive joining, which are well known in the art. A stopper 42 that defines the insertion position of each pipe member 11, 40 into the joint body 41 is formed on the inner peripheral surface 41 b at the center of the joint body 41. As shown in FIG. 8, the stopper 42 is formed so as to protrude from the inner peripheral surface 41 b of the joint body 41 and to turn in the circumferential direction of the joint body 41. The protruding end surface 42a of the stopper 42 is a flat surface parallel to the inner peripheral surface 41b of the joint body 41, and the diameter of the circle defined by the protruding end surface 42a is set to a size that allows the split member 15 to be inserted. .

  As shown in FIGS. 7 and 8, the rotation preventing means 22 is provided on the protruding end surface 42 a of the stopper 42 and can be engaged with each side edge 17 of the flat portion 16 of the split member 15 inserted into the joint body 41. A plate-like arc-shaped member 43 is provided. The arc-shaped member 43 is formed by partially cutting a tube member (not shown) whose outer diameter is equal to the diameter of a circle defined by the protruding end surface 42a of the stopper 42, for example, and as shown in FIG. The portion 16 extends from one side edge portion 17 toward the other side edge portion 17 along the protruding end surface 42 a of the stopper 42, and the plate thickness direction thereof is aligned with the radial direction of the joint body 41. The plate thickness dimension of the arc-shaped member 43 is set to such a size that both end surfaces 43 a abut against the side edge portions 17 of the flat surface portion 16 in a state where the split member 15 is inserted into the joint main body 41. The arc-shaped member 43 is fixed to the stopper 42 with, for example, an adhesive. The arcuate member 43 can be formed integrally with the joint body 41 on the stopper 42.

  According to the example shown in FIGS. 7 and 8, the both end surfaces 43 a of the arcuate member 43 are in contact with the side edges 17 of the flat portion 16 of the split member 15 in a state where the split member 15 is inserted into the joint body 41. Therefore, when the rotational force that rotates the divided member around the axis of the pipe members 11, 40, that is, the axis of the joint body 41 is applied to the divided member 15, the rotational force causes the arc-shaped member 43 to extend in the extending direction. It acts as a compressive force to compress. Thereby, for example, even when the cables 13 and 14 (see FIG. 1) move to the in-course in the pipe members 11 and 40 at the curved portion of the pipe member 11, the movement of the dividing member 15 causes the axis of the pipe member by this movement. Rotation around is prevented. Therefore, when the lead-in cable 14 is drawn into the building from the pipe members 11 and 40, for example, when an opening for taking out the lead-in cable 14 from the pipe members 11 and 40 is formed in the curved portion of the pipe members 11 and 40. Thus, it is possible to reliably prevent the rotated divided member 15 from obstructing the formation of the opening.

  In general, since the pipe members 11 and 40 are formed by extrusion molding, when the rotation prevention means 22 is integrally formed on the pipe members 11 and 40 to prevent the division member 15 from rotating, the rotation prevention means 22 is provided. It is necessary to newly manufacture a molding die for forming the pipe member 11 thus formed, which may increase the manufacturing cost.

  On the other hand, since the pipe joint 39 is generally formed by injection molding, when the rotation prevention means 22 is provided in the pipe joint 39, a so-called nesting for forming the rotation prevention means 22 in the pipe joint 39 is already provided. By providing in this molding die, the pipe joint 39 provided with the rotation preventing means 22 can be formed at low cost without newly manufacturing the molding die. Thereby, compared with the case where the rotation prevention means 22 is integrally formed in the pipe members 11 and 40, the manufacturing cost can be reliably reduced.

  Further, when it is necessary to bend the pipe members 11 and 40 according to the piping direction, if the pipe members 11 and 40 are bent when the pipe members 11 and 40 are bent, the rotation prevention means 22 is damaged. There is a risk of it. Also, the pipe members 11 and 40 are embedded in the road surface so that the plate thickness direction of the flat portion 16 of the divided member 15 inserted into the pipe member is always held in the vertical direction. Since it is necessary to bend the members 11 and 40, even if the pipe members 11 and 40 can be bent without causing damage to the rotation preventing means 22, for example, the pipes 11 and 40 are bent to bend to the right. The bent pipe member cannot be used as a pipe member for bending leftward, and the bent pipe member is not versatile.

  On the other hand, according to the present invention, as described above, by providing the joint body 41 with the rotation preventing means 22, the pipe members 11 and 40 are not subjected to the processing for preventing the rotation of the split member 15, and thus the split member 15. Therefore, even when it is necessary to bend the pipe members 11 and 40 in accordance with the piping direction, the pipe members 11 and 40 are bent without causing damage to the rotation preventing means 22. In addition, for example, the pipe members 11 and 40 bent to bend the pipe direction to the right can be used when the pipe direction is bent to the left, and the bent pipe members 11 and 40 are generally used. Can have sex.

  Furthermore, since the arc-shaped member 43 formed separately from the joint body 41 can be retrofitted to the joint body 41 of the existing pipe joint 39, it is necessary to urgently perform piping using the dividing member 15 at the construction site, for example. Even if it occurs, the pipe joint 39 having the function of preventing rotation of the split member 15 can be easily formed at the construction site by attaching the arc-shaped member 43 to the pipe joint 39 prepared at the construction site.

  In the example shown in FIGS. 7 and 8, an example in which the arc-shaped member 43 is disposed between the side edge portions 17 of the flat surface portion 16 of the dividing member 15 is shown, but instead of this, the arc-shaped member 43 is not shown. Can be disposed between the leaf spring portions 18 such that both end faces 43a abut against the tip end 18b of each leaf spring portion 18 of the dividing member 15, and between the side edge portions 17 of the plane portion 16 and The arc-shaped member 43 can be disposed between both the leaf spring portions 18.

  Further, in the example shown in FIGS. 7 and 8, the example in which the rotation preventing means 22 is configured by the plate-like arc member 43 extending along the protruding end surface 42 a of the stopper 42 of the joint body 41 is shown. Instead, as shown in FIG. 9, the rotation preventing means 22 can be composed of a pair of engaging protrusions 44 that protrude from the protruding end surface 42 a of the stopper 42 toward the inside of the joint body 41.

  In the example shown in FIG. 9, each engagement protrusion 44 is provided on the protruding end surface 42 a of the stopper 42 in the vicinity of each side edge 17 of the flat portion 16 of the split member 15 inserted into the joint body 41. It is formed so as to cover. The tip of each engagement protrusion 44 has a substantially semicircular cross section. Thereby, each pulling cable 14 (refer to FIG. 1) accommodated in the pulling cable accommodating portion 20 can be prevented from being damaged by being caught on the tip of each engaging projection 44. .

  According to the example shown in FIG. 9, when the rotational force that rotates the divided member around the axis of the joint body 41 acts on the divided member 15, the side edge portions 17 of the flat surface portion 16 of the divided member 15 are respectively Since the engagement protrusion 44 is engaged, rotation of the split member 15 around the axis of the joint body 39 can be prevented with a simple structure.

  In the example shown in FIG. 9, the tip of each engagement protrusion 44 has an approximately semicircular cross section, but instead, the engagement protrusion has a substantially trapezoidal cross section, for example. Can be applied to the present invention.

  Further, in the example shown in FIG. 9, an example is shown in which both engaging projections 44 are formed on the protruding end surface 42 a of the stopper 42 in the vicinity of each side edge 17 of the flat portion 16 of the dividing member 15. Although not shown, either one of the engaging protrusions 44 or both engaging protrusions 44 can be formed on the protruding end surface 42 a of the stopper 42 in the vicinity of the tip 18 b of each leaf spring portion 18 of the split member 15.

  Furthermore, in the example shown in FIGS. 7 to 9, each pipe member 11, 40 is mutually connected by a pipe joint 39 including a joint body 41 formed with a stopper 42 for defining the insertion position of each pipe member 11, 40. Although an example of connection is shown, instead of this, as shown in FIG. 10, the pipe members 11 and 40 may be connected to each other by a pipe joint 46 including a joint body 45 in which the stopper 42 is not formed. it can.

  In the example shown in FIG. 10, the rotation preventing means 22 includes a cylindrical member 47 that is inserted into the joint main body 45 so that the axis of the joint main body 45 coincides with the axis of the joint main body, and a plurality of members formed on the inner peripheral surface 45 a of the joint main body 45. And a pair of protrusions 49 formed on the outer peripheral surface 47a of the cylindrical member 47 and engageable with the corresponding one of the recesses 48 (FIG. 10 shows one protrusion 49). Is formed on the inner peripheral surface 47b of the cylindrical member 47 so as to protrude inward of the cylindrical member 47 from the inner peripheral surface, and is engaged with each side edge portion 17 of the flat surface portion 16 of the dividing member 15. And a pair of engaging protrusions 50 that can be combined.

  As shown in FIG. 11, the tubular member 47 has an outer diameter that is approximately the same as the inner diameter of the joint body 45, and an inner diameter that allows the split member 15 to be inserted. In addition, the length dimension along the axis of the tubular member 47 is such that the tubular member 47 is inserted into the joint body 45 and the end portions 11b of the pipe members 11 and 40 into the insertion end 45a of the joint body 45 are as follows. , 40a (see FIG. 10) is set to a size that allows insertion.

  Each recess 48 is formed on the inner peripheral surface 45a at a position corresponding to each projection 49 of the cylindrical member 47 for each predetermined rotation angle around the axis. Thus, when the cylindrical member 47 is inserted into the joint body 45, each projection 49 is placed in a posture in which the plane passing through each projection 49 of the cylinder member 47 is substantially horizontal, regardless of the orientation of the joint body 45. Each of the recesses 48 can be engaged with a corresponding recess 48. By engaging the protrusions 49 with the recesses 48, the cylindrical member 47 can be easily fixed in the joint body 45 so as not to rotate around its axis.

  Each engaging protrusion 50 covers each side edge 17 on the inner peripheral surface 47b of the cylinder member 47 in the vicinity of each side edge 17 of the flat surface portion 16 of the split member 15 inserted into the cylinder member 47. Is formed. The tip of each engaging protrusion 50 has a substantially semicircular cross section. Thereby, each pulling cable 14 (refer FIG. 1) accommodated in the pulling cable accommodating part 20 can prevent damage to each pulling cable 14 by being hooked on the front-end | tip of each engaging protrusion 50. FIG. .

  According to the example shown in FIGS. 10 and 11, when the rotational force that rotates the divided member around the axis of the joint body 45 is applied to the divided member 15, each side edge portion 17 of the planar portion 16 of the divided member 15. Are engaged with the respective engaging protrusions 50, so that the rotation of the split member 15 around the axis of the joint body 39 is prevented.

  In the example shown in FIG.10 and FIG.11, although both the engagement protrusion 50 showed in the vicinity of each side edge part 17 of the plane part 16 of the division member 15 on the internal peripheral surface 47b of the cylindrical member 47, Instead of this, although not shown, either one of the engaging protrusions 50 or both engaging protrusions 50 are formed on the inner peripheral surface 47 b of the cylindrical member 47 in the vicinity of the tip 18 b of each leaf spring portion 18 of the split member 15. be able to.

  Further, in the examples shown in FIGS. 10 and 11, the tip of each engaging projection 50 has an almost semicircular cross section, but instead, the tip has a substantially trapezoidal cross section, for example. The engaging protrusion having the above can be applied to the present invention.

  In the example shown in FIGS. 1 to 3, 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. For example, although not 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.

It is a cross-sectional view schematically showing a pipeline structure according to the present invention. (A) is a top view which shows roughly the division | segmentation member based on this invention, (b) is a side view of (a). (A) is a bottom view which shows roughly the state which connected each part of the division | segmentation member isolate | separated by formation of a cutting part with a connection means, (b) is II line of (a). It is the longitudinal cross-sectional view along. (A), (b) and (c) is a cross-sectional view schematically showing another embodiment of the dividing member. FIG. 4 is a transverse sectional view schematically showing a modification of the rotation preventing means shown in FIGS. 1 to 3. FIG. 6 is a cross-sectional view schematically showing an embodiment different from the example shown in FIG. 5. It is a section perspective view showing roughly the state where the pipe member concerning the present invention was connected to other pipe members via a pipe joint. It is a cross-sectional view which shows roughly the state by which the division member was accommodated in the pipe joint which concerns on this invention. FIG. 9 is a cross sectional view schematically showing an embodiment different from the examples shown in FIGS. 7 and 8. FIG. 10 is a partially broken perspective view schematically showing an embodiment different from the examples shown in FIGS. 7 to 9. It is a cross-sectional view along the II line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pipe structure 11 Pipe member 11a Inner peripheral surface 12 Communication cable 13 Trunk cable 14 Pull-in cable 15 Dividing member 16 Plane part 17 Side edge part 18 Leaf spring part 18b Tip (tip of leaf spring part)
DESCRIPTION OF SYMBOLS 22 Anti-rotation means 23 Recessed part 24 Protrusion part 25 Slit 26 Cutting part 27 Part 27a, 27b End part 28 Connection means 29 Connection member 30 Hole (long hole)
31 engaging portion 37, 44 engaging protrusion 38, 43 arc-shaped member 39, 46 pipe joint 41, 45 joint main body 41b, 45a inner peripheral surface (inner peripheral surface of joint main body)
47 cylindrical member 47a outer peripheral surface (outer peripheral surface of cylindrical member)
47b Inner peripheral surface (inner peripheral surface of cylindrical member)
48 Recess 49 Projection 50 Engagement Projection

Claims (8)

A trunk cable, branched from the stem line cable comprises a tube member which is embedded in a communication cable revenue volume to under road surface having a pull-in cable is pulled into the building, inside the tube member, The pipe member is arranged to extend along the longitudinal direction of the pipe member, and the inside of the pipe member is divided into at least two parts so that the trunk cable and the lead-in cable are separately accommodated in the pipe member. dividing member is provided et been for,
The split member is a pair of plate-like flat portions and a pair of elastic members that extend from each side edge portion of the flat portion toward one side of the flat portion and exert an elastic force in the direction of expanding the diameter of the pipe member. A leaf spring-like leaf spring portion, and
Said tube member, as a rotation preventing means for has a circular cross section, which is pre-Symbol dividing member to prevent rotation about the axis of the tube member at said tube member,
And a recess formed in said surface opposite to said inner peripheral surface of the pipe member of the plate spring portions of the front Symbol dividing member, the inside of the pipe member from the inner peripheral surface of the inner peripheral surface of the pipe member And a projecting portion that is provided so as to project into the concave portion of each of the leaf spring portions. A trunk cable, branched from the stem line cable comprises a tube member which is embedded in a communication cable revenue volume to under road surface having a pull-in cable is pulled into the building, inside the tube member, The pipe member is arranged to extend along the longitudinal direction of the pipe member, and the inside of the pipe member is divided into at least two parts so that the trunk cable and the lead-in cable are separately accommodated in the pipe member. dividing member is provided et been for,
The split member is a pair of plate-like flat portions and a pair of elastic members that extend from each side edge portion of the flat portion toward one side of the flat portion and exert an elastic force in the direction of expanding the diameter of the pipe member. A leaf spring-like leaf spring portion, and
Said tube member, as a rotation preventing means for has a circular cross section, which is pre-Symbol dividing member to prevent rotation about the axis of the tube member at said tube member,
And in the vicinity of the tip of the near or the respective plate spring portions of the respective side edges of the flat portion of the dividing member into the inner circumferential surface of the front Kikan member toward from the inner peripheral surface inwardly of the tube member A pipe structure comprising a pair of engaging protrusions formed so as to protrude and engageable with the respective side edge portions of the flat surface portion of the dividing member or the tip ends of the leaf spring portions. A trunk cable, branched from the stem line cable comprises a tube member which is embedded in a communication cable revenue volume to under road surface having a pull-in cable is pulled into the building, inside the tube member, The pipe member is arranged to extend along the longitudinal direction of the pipe member, and the inside of the pipe member is divided into at least two parts so that the trunk cable and the lead-in cable are separately accommodated in the pipe member. dividing member is provided et been for,
The split member is a pair of plate-like flat portions and a pair of elastic members that extend from each side edge portion of the flat portion toward one side of the flat portion and exert an elastic force in the direction of expanding the diameter of the pipe member. A leaf spring-like leaf spring portion, and
Said tube member, as a rotation preventing means for has a circular cross section, which is pre-Symbol dividing member to prevent rotation about the axis of the tube member at said tube member,
Towards from one of the side edges of the flat portion of the front Symbol dividing members on the other of said side edges, or the tube member toward the leading end of one of the plate spring portion at the distal end of the other of the plate spring portion An arcuate member fixed to the inner peripheral surface so as to extend along the inner peripheral surface of the pipe structure. A trunk cable, branched from the stem line cable comprises a tube member which is embedded in a communication cable revenue volume to under road surface having a pull-in cable is pulled into the building, inside the tube member, The pipe member is arranged to extend along the longitudinal direction of the pipe member, and the inside of the pipe member is divided into at least two parts so that the trunk cable and the lead-in cable are separately accommodated in the pipe member. dividing member is provided et been for,
The split member is a pair of plate-like flat portions and a pair of elastic members that extend from each side edge portion of the flat portion toward one side of the flat portion and exert an elastic force in the direction of expanding the diameter of the pipe member. A leaf spring-like leaf spring portion, and
The pipe member has a circular cross section and is connected to another pipe member via a pipe joint, and the pipe joint is a cylindrical joint into which ends of the pipe members are inserted at both ends. A main body, and the joint main body as a rotation preventing means for preventing the divided member from rotating around the axis of each pipe member ;
Among the vicinity of the respective side edges of the flat portion of the dividing member on the inner peripheral surface of the front Symbol joint body or the from the inner peripheral surface of the fitting body in the vicinity of the tip of the plate spring portions of the joint body It is formed so as to protrude toward towards, and characterized in that it comprises the said respective side edges of the flat portion of the division member, or the pair of engaging projections engageable with the distal end of the plate spring portions Pipe line structure. A trunk cable, branched from the stem line cable comprises a tube member which is embedded in a communication cable revenue volume to under road surface having a pull-in cable is pulled into the building, inside the tube member, The pipe member is arranged to extend along the longitudinal direction of the pipe member, and the inside of the pipe member is divided into at least two parts so that the trunk cable and the lead-in cable are separately accommodated in the pipe member. dividing member is provided et been for,
The split member is a pair of plate-like flat portions and a pair of elastic members that extend from each side edge portion of the flat portion toward one side of the flat portion and exert an elastic force in the direction of expanding the diameter of the pipe member. A leaf spring-like leaf spring portion, and
The pipe member has a circular cross section and is connected to another pipe member via a pipe joint, and the pipe joint is a cylindrical joint into which ends of the pipe members are inserted at both ends. A main body, and the joint main body as a rotation preventing means for preventing the divided member from rotating around the axis of each pipe member ;
The joint body toward the one of the side edges of the planar portion of the front Symbol dividing member toward the other of said side edges, or from the tip of one of the plate spring portion at the distal end of the other of the plate spring portion A pipe structure comprising an arcuate member fixed to the inner peripheral surface so as to extend along the inner peripheral surface. A trunk cable, branched from the stem line cable comprises a tube member which is embedded in a communication cable revenue volume to under road surface having a pull-in cable is pulled into the building, inside the tube member, The pipe member is arranged to extend along the longitudinal direction of the pipe member, and the inside of the pipe member is divided into at least two parts so that the trunk cable and the lead-in cable are separately accommodated in the pipe member. dividing member is provided et been for,
The split member is a pair of plate-like flat portions and a pair of elastic members that extend from each side edge portion of the flat portion toward one side of the flat portion and exert an elastic force in the direction of expanding the diameter of the pipe member. A leaf spring-like leaf spring portion, and
The pipe member has a circular cross section and is connected to another pipe member via a pipe joint, and the pipe joint is a cylindrical joint into which ends of the pipe members are inserted at both ends. A main body, and the joint main body as a rotation preventing means for preventing the divided member from rotating around the axis of each pipe member ;
The outer periphery of the pre-Symbol the axis into the coupling body is aligned with the axis of該継hand body is inserted, the cylindrical member to allow insertion of the dividing member, and a recess formed in said inner peripheral surface of the fitting body, the tubular member Protrusions formed on the surface and engageable with the recesses, in the vicinity of the side edges of the flat portion of the split member on the inner peripheral surface of the cylindrical member , or in the vicinity of the tips of the leaf springs in is formed from the inner peripheral surface of the tubular member so as to protrude toward the inside of the tubular member, wherein each side edge of the flat portion of the dividing member or the to the distal end of the plate spring portions A pipe structure comprising a pair of engaging protrusions that can be engaged. A trunk cable, branched from the stem line cable comprises a tube member which is embedded in a communication cable revenue volume to under road surface having a pull-in cable is pulled into the building, inside the tube member, The pipe member is arranged to extend along the longitudinal direction of the pipe member, and the inside of the pipe member is divided into at least two parts so that the trunk cable and the lead-in cable are separately accommodated in the pipe member. dividing member is provided et been for,
The front Symbol dividing member is formed a plurality of cutting portions for cutting the dividing member at a mutually predetermined intervals in the longitudinal direction of the dividing member along its width direction, by formation of the respective cutting portions between the parts of the separated said dividing member, as a connecting means for concatenating the respective portions adjacent to each other,
A connecting member extending toward said portion adjacent the end portion on the end portion of one of the ends face each other in the longitudinal direction of each portion of the front Symbol dividing member, and the hole formed in the connecting member, A conduit structure comprising: a rivet provided so as to project into a trunk cable housing portion from a hole provided in the other end portion of each of the portions, and engaging with the hole of the connecting member. The pipe structure according to claim 7 , wherein the hole formed in the connecting member is a long hole extending along an extending direction of the connecting member.

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