JP5172558B2 - Communication pipe branch joint and communication pipe - Google Patents

Description

  The present invention relates to a communication pipe branch joint for branching a cable accommodated in a communication pipe and a communication pipe.

  2. Description of the Related Art Conventionally, a communication pipe that accommodates a communication cable and protects it from underground water or the like when a communication cable is buried underground in consideration of the landscape is known.

  When the communication cable is drawn into the building from the communication pipe, it is common to use a communication pipe branch joint that branches the cable from the communication pipe.

  As such a communication pipe branch joint, for example, Patent Document 1 includes a saddle portion and a branch portion, and the saddle portion is depressed along the periphery of a through hole provided in the communication pipe and is continuously connected to the branch portion. A branch joint is disclosed. According to such a configuration, the branch portion can be accurately positioned with respect to the through hole.

  Further, Patent Document 2 discloses a branch joint in which the branch portion is provided substantially horizontally, so that the branch portion does not become higher than the apex of the communication tube, and the embedding depth of the communication tube can be reduced. .

  By the way, in the above-mentioned communication pipe, when the cable is drawn from the communication pipe to the building, the wiring tool is sent from the communication pipe branch joint to the cable connection mass through the communication pipe, and the branch cable to be drawn into the building is passed to the tip of the wiring tool. After installation, pull back the wiring tool.

  If it does so, a branch cable will be pulled by a wiring tool, and a branch cable can be drawn in in a building through a communication pipe and a communication pipe branch joint from a cable connection mass.

  When the communication pipe is embedded under a road surface where buildings are built on both sides like a road provided in a residential area, it is necessary to draw a branch cable on both sides of the communication pipe.

  Therefore, it has been proposed to attach a communication pipe branch joint in which a pair of branch parts is provided in the saddle part to the communication pipe main body.

  In this communication pipe branch joint, one of the pair of branch portions extends from the saddle portion toward one side of the road, and the other branch portion extends from the saddle portion toward the other side of the road. Is formed.

Therefore, the branch cable can be drawn into the buildings on both sides of the communication pipe by passing the branch cable in the communication pipe from the communication pipe into the respective branch portions.
Japanese Patent No. 2530941 JP 2001-159494 A

  However, since the above-mentioned communication pipe branch joint is provided in the upper half of the communication pipe, in the state where the branch cable is drawn from the communication pipe to each branch part, the branch cable is partially from each branch part in the communication pipe. Will hang down.

  For this reason, when a branching cable is drawn into a building through one branching part, if you attempt to insert a wire fitting from the other branching part into the communication pipe, the lower part of the branching cable hanging from one branching part There is a risk that the line tool will get into the cable.

  And if the line tool goes under the hanging part of the branch cable in this way, the movement of the line tool toward the cable connection mass is hindered, and the line work for newly drawing the branch cable is not performed. There was a problem that became difficult.

  Accordingly, an object of the present invention is to provide a communication pipe branch joint in which branch cables are not easily entangled and a communication pipe to which the communication pipe branch joint is attached.

  In order to achieve the above object, a communication pipe branch joint according to the present invention includes a saddle part joined to a communication pipe that accommodates a cable and a branch part that accommodates a branch cable branched from the cable. The communication pipe branch joint is provided such that the branch portion is provided so as to face in a substantially horizontal direction in a state of being joined to the communication pipe, and is disposed on both sides of the communication pipe in the axial direction of the communication pipe. It is characterized by being shifted from each other.

  Further, the branch portion is provided with a bulging portion that is smoothly connected to the inner surface of the communication tube while being joined to the communication tube, on the inner surface on the side connected to the communication tube at an obtuse angle. Is preferred.

  Further, it is preferable that the saddle portion is provided with a notch groove continuously in the axial direction of the communication tube between the branch portions arranged on both sides of the communication tube.

  The communication pipe of the present invention is provided with an opening corresponding to the branch portion of any of the above-described communication pipe branch joints, and the communication pipe branch joint is attached so that the branch portion is aligned with the opening. It is characterized by that.

  Moreover, it is preferable that the said opening part is mutually shifted and shifted in the axial direction of the said communication pipe corresponding to each of the said branch part arrange | positioned at both sides.

  As described above, the communication pipe branch joint of the present invention is a communication pipe branch joint in which the saddle portion and the branch portion are integrally provided, and the branch portion is directed in a substantially horizontal direction while being joined to the communication pipe. And arranged separately on both sides of the communication tube and separately from each other in the axial direction of the communication tube.

  Accordingly, the position where the branch cables inserted into the respective branch portions are bent is also shifted, so that the branch cables are hardly entangled in the communication pipe.

  Further, since the bulging portion that smoothly connects to the inner surface of the communication tube is provided on the inner surface of the branch portion, it is possible to prevent the wire tool from being caught and the cable from being damaged.

  Further, the saddle portion is provided with a notch groove continuously between the branch portions on both sides in the axial direction of the communication tube, so that it can be easily cut at the construction site when branching to only one side.

  And the communication pipe of the present invention is provided with an opening corresponding to the branch portion of any of the above-described communication pipe branch joints, and the communication pipe branch joint is attached so as to match the branch portion with the opening, The branch cables are less likely to get entangled, and the communication pipe has good line workability.

  In addition, the openings are provided separately from each other in the axial direction of the communication tube corresponding to each of the branch portions arranged on both sides, thereby maintaining the strength necessary for the communication tube that accommodates the cable. Can do.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  First, the whole structure of the communication system S provided with the communication pipe branch joint 1 of this invention is demonstrated using FIG.

  As shown in FIG. 2, the communication system S according to the present embodiment includes box-shaped hand holes 81 and 82 that can be operated by a worker on the ground, and from one hand hole 81 to the other hand hole 82. A plurality of communication pipes 5,... Connected to accommodate communication cables (not shown), and attached to branch the cables housed in the communication pipes 5,. The communication pipe branch joint 1 is provided.

  The communication tube 5 is formed in a cylindrical shape by a resin such as vinyl chloride, and integrally includes a cylindrical main body portion 50 and a short cylindrical receiving portion 51 that is slightly larger than the main body portion 50. As shown in FIG. 3, a pair of openings 53 and 54, which will be described later, are provided in the upper part (see FIG. 7).

  And as shown in FIG. 3, inside this communication pipe | tube 5, a pair of protruding item | line 52,52 is provided in the position which opposes to a diametrical direction continuously in the pipe-axis direction, This protruding item | line 52, 52 is fitted with a separator 63 that divides the cross section of the communication tube 5 into upper and lower portions.

  The separator 63 is used to divide the internal space of the communication pipe 5 into upper and lower portions, and includes a central plate 63a bent into a gentle V shape, and leg portions 63b formed so as to bend both ends of the central plate 63a. 63b, etc.

  And the groove 63c, 63c is formed in the vicinity of the root of each leg part 63b, 63b by bending in S shape, and this groove 63c, 63c is formed into the convex strips 52, 52 of the communication pipe 5. The load placed on the central plate 63a is supported by the fitting.

  A plurality of sheath pipes 64,... Are arranged in the lower space divided by the separator 63, and a large-diameter communication cable 61 is inserted into each sheath pipe 64,. Yes.

  Further, in the upper space partitioned by the separator 63, a small-diameter branch cable 62 formed by branching the large-diameter cable 61 in the hand hole 81 (82) is a central plate 63a of the separator 63. It is accommodated so that it may be mounted.

  As shown in FIG. 1, the communication pipe branch joint 1 according to the present embodiment includes a saddle portion 2 joined to the outer surface of a cylindrical communication pipe 5 by an adhesive, and a branch cable 62 into which a cable 61 is subdivided. And a pair of branch portions 3 and 4 through which is inserted.

  The saddle portion 2 is formed of a resin or the like as a semicircular arc plate along the outer surface of the communication tube 5, and each of the branch portions 3 and 4 has a sufficient adhesive strength to the communication tube 5 (see FIG. 3). 1 has a predetermined bonding length on both the upstream side of one branch part 3 (left side in FIG. 1) and the downstream side of the other branch part 4 (right side in FIG. 1).

  The pair of branch portions 3 and 4 are formed of resin, respectively, and the cylindrical portions 30 and 40 branched from the saddle portion 2 and triangular reinforcing portions 32 and 42 that reinforce the roots of the cylindrical portions 30 and 40. And provided on both sides of the saddle portion 2.

  Further, the branch portions 3 and 4 are provided substantially horizontally in a direction parallel to the tangent so as not to protrude from the tangent at the vertex of the arc of the saddle portion 2 in the cross section perpendicular to the tube axis shown in FIG. .

  Therefore, in a state where the saddle portion 2 is joined to the communication tube 5, the pair of branch portions 3 and 4 protrude above the communication tube 5 only by the thickness of the saddle portion 2.

  The branch portions 3 and 4 are provided substantially in the horizontal direction, but are not strictly limited to the horizontal direction, and the whole is slightly inclined so that the end faces slightly upward. Alternatively, it may be bent so that only the ends are directed slightly upward.

  As shown in FIGS. 4 and 5, the branch portions 3 and 4 according to the present embodiment are shifted from each other in the attachment position with respect to the saddle portion 2 in the tube axis direction.

  Therefore, since the insertion ports 23 and 24 to the branch portions 3 and 4 provided in the saddle portion 2 are also provided by being displaced in the tube axis direction of the communication tube 5, the drawn branch cables 62 and 62 ( (See FIG. 3) are not buffered in the vicinity of the center of the communication pipe 5.

  Further, as shown in FIGS. 3, 5, and 6, the branch pipes 3 and 4 are connected to the communication pipe 5 on the upstream inner surface connected to the communication pipe 5 at an obtuse angle. The bulging parts 31 and 41 which form the substantially same circumferential surface as the inner surface of are provided.

  The bulging portions 31 and 41 are formed by gradually increasing the thickness of the upstream member in the vicinity of the roots of the cylindrical portions 30 and 40 of the branching portions 3 and 4 toward the root, and in the direction perpendicular to the tube axis. When cut in cross section, it has a substantially trapezoidal shape.

  Furthermore, since the side surfaces of the bulging portions 31 and 41 are inclined and the width is narrower near the top surface than the base, they fit into the openings 53 and 54 (see FIG. 7) of the communication tube 5. It has become easier.

  The communication tube 5 of the present embodiment is provided with openings 53 and 54 at positions corresponding to the respective branch portions 3 and 4.

  In other words, the openings 53 and 54 are provided so as to be shifted from each other in the tube axis direction so as to correspond to the insertion openings 23 and 24 provided to be shifted from each other in the tube axis direction in the saddle portion 2.

  Therefore, when the communication pipe branch joint 1 is attached to the communication pipe 5, the openings 53 and 54, the insertion openings 23 and 24, the branch parts 3 and 4, the branch communication pipe (flexible pipe) 5a (see FIG. 2). In this order, a branch path that connects the branch cable 62 is formed.

  Next, the operation of the communication pipe branch joint 1 of the present embodiment will be described.

  Thus, the communication pipe branch joint 1 of the present embodiment is a communication pipe branch joint 1 in which the saddle portion 2 and the branch portions 3 and 4 are integrally provided.

  The branch portions 3 and 4 are provided so as to face in a substantially horizontal direction while being joined to the communication tube 5 and are arranged on both sides of the communication tube 5 so as to be shifted from each other in the axial direction of the communication tube 5 separately. Provided.

  Therefore, the positions where the branch cables 62 and 62 inserted into the respective branch portions 3 and 4 are bent are shifted, so that the branch cables 62 and 62 are not easily entangled in the communication pipe 5.

  That is, conventionally, in a residential area or the like, the branch cables 62 and 62 may be drawn to both sides from a single communication pipe 5, but when the branch portions are aligned, the branch cables 62 and 62 are bent. However, they were almost in the same position and entangled with each other.

  Thus, by displacing the position where the branch cables 62 and 62 are bent in the tube axis direction, it is possible to suppress entanglement.

  Conventionally, as shown in FIG. 3, when the branch cable 62 is inserted into one branch section 4 and the branch cable 62 is to be pulled in through the other branch section 3, the positions of the branch sections 3 and 4. If they are aligned, there is a possibility that the wiring tool will sink under one of the branch cables 62 and not reach the hand hole.

  Therefore, by shifting the lead-in position of the branch cable 62 arranged in advance, it becomes difficult for the wire-line tool to get in, and even when it gets in, the wire-wire tool reaches the hand hole by gently bending it. To be able to.

  And while shifting the position of the branch parts 3 and 4, when these are integrated, the length of the main-body part 50 of the communication pipe 5 is restricted short in the curved part of the communication system S, etc. In addition, the communication pipe branch joint 1 branched in both the left and right directions can be attached.

  Furthermore, since the branch parts 3 and 4 are bifurcated in both directions, the saddle part 2 is used in common as compared with the case where the branch parts are branched only on one side, so that the other is reinforced and the adhesive strength is increased. growing.

  In addition, the branch portions 3 and 4 of the communication pipe branch joint 1 are provided so as to face substantially horizontally in a state of being joined to the communication pipe 5, and thus do not protrude upward from the communication pipe 5. The burial depth can be reduced.

  Further, the inner surfaces of the branch portions 3 and 4 are provided with swelled portions 31 and 41 having trapezoidal cross sections that are smoothly connected to the circumferential surface of the inner surface of the communication tube 5, so that the wire passing tool is used for wiring in construction. Can be prevented and the branch cables 62 and 62 can be prevented from being damaged.

  In addition, the bulging portions 31 and 41 are formed so as to gradually increase the thickness of the member from the building 71 side toward the communication pipe 5 side. When this is inserted into 4, the connecting tool is not bent suddenly, so that the insertion becomes easy.

  Furthermore, by providing the bulging portions 31 and 41 in this way, it is easy to fit the bulging portions 31 and 41 of the communication pipe branch joint 1 into the openings 53 and 54 of the communication pipe 5 at the time of construction. Can be positioned.

  In addition, earth pressure acts on the communication pipe branch joint 1 from above and from the side, but the bulging parts 31 and 41 are engaged with the openings 53 and 54 so that the communication pipe 5 is loaded. Can be transmitted.

  And the communication pipe 5 of this Embodiment is provided with the opening parts 53 and 54 corresponding to the branch parts 3 and 4 of any one of the above-mentioned communication pipe branch joints 1, and the branch part 3 is provided in the opening parts 53 and 54. , 4 are attached so that the branch pipes 62 and 62 are not easily entangled with each other, so that the communication pipe 5 with good line workability can be obtained.

  Further, the openings 53 and 54 are provided separately from each other in the axial direction of the communication tube 5 so as to correspond to the branch portions 3 and 4 disposed on both sides, so that the cable 61 and the branch cable 62 are connected. The strength required for the communication pipe 5 to be accommodated can be maintained.

  That is, since the main body portion 50 of the communication pipe 5 remains between the openings 53 and 54, the adhesive strength is obtained by bonding the saddle portion 2 of the communication pipe branch joint 1 to the remaining main body portion 50. In addition, since the thickness of the member in this portion is larger than usual, the cross-sectional performance against bending and the like is reinforced.

  If the necessary strength can be maintained in this way, it is possible to prevent the branching point of the communication system S from being damaged even when the earth covering is small and the load on the ground surface acts directly.

  Hereinafter, a communication pipe branch joint 1 </ b> A of a form different from the above embodiment will be described with reference to FIG. 8.

  The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  First, the configuration will be described. As shown in FIG. 8, the communication pipe branch joint 1A of the present embodiment integrally includes a saddle portion 2 and a pair of branch portions 3 and 4.

  The saddle portion 2 is formed as a semicircular arc plate with resin or the like, and one of the branch portions 3 and 4 has sufficient adhesive strength with respect to the communication tube 5 (see FIG. 3). Both the upstream side of the branch part 3 and the downstream side of the other branch part 4 have a predetermined bonding length.

  The saddle portion 2 of this embodiment has a V-shape continuously between the branch portions 3 and 4 provided on both sides and on the inner surface near the top of the arc in the tube axis direction of the communication tube 5. The notch groove 21 is provided.

  The position where the notch groove 21 is provided does not necessarily have to be on the inner surface side in the vicinity of the apex, and may be any position as long as the necessary adhesion strength to the communication tube 5 can be obtained in a divided state. A plurality of them may be provided.

  For example, when it is determined that only one branch part 3 is used, in order to increase the adhesive strength on the one branch part 3 side, notch grooves ( (Not shown) may be provided and cut.

  Next, the operation will be described.

  As described above, the saddle portion 2 of this embodiment is provided with the notch groove 21 continuously between the branch portions 3 and 4 on both sides in the axial direction of the communication tube 5, so that the saddle portion 2 branches only to one side. It can be cut easily and bisected at the construction site.

  That is, by providing the cutting notch groove 21 at an accurate position in advance, it is not necessary to determine the cutting position at the construction site, and the time required for positioning (marking out) becomes unnecessary.

  In addition, in the portion of the notch groove 21, the thickness of the saddle portion 2 is thin, and since this thin portion is cut, the cutting operation itself becomes easy.

  And if it becomes easy to cut at the construction site in this way, the communication pipe branch joint 1 can be used as a two-way branch or a one-way branch depending on the situation of other buried objects at the construction site. Can do.

  Other configurations and operational effects are substantially the same as those in the above-described embodiment, and thus the description thereof is omitted.

  The preferred embodiments and examples of the present invention have been described in detail with reference to the drawings, but the specific configuration is not limited to the embodiments or examples, and does not depart from the gist of the present invention. A degree of design change is included in the present invention.

  For example, in the above-described embodiments and examples, the case where the openings 53 and 54 are provided corresponding to the branch portions 3 and 4 has been described, but the present invention is not limited to this, and the openings are reinforced. In addition, a single opening that covers both the insertion openings 23 and 24 of the saddle portion 2 may be provided.

It is a perspective view explaining the structure of the communication pipe branch joint of the best embodiment of this invention. It is explanatory drawing explaining the whole structure of a communication system. It is sectional drawing explaining the state which attached the communication pipe branch joint of the best embodiment of this invention to the communication pipe. It is a top view of the communication pipe branch joint of the best embodiment of the present invention. It is a bottom view of the communication pipe branch joint of the best embodiment of the present invention. It is a front view of the communication pipe branch joint of the best embodiment of the present invention. It is a top view of the communication pipe of the best embodiment of the present invention. It is explanatory drawing explaining the structure of the communication pipe branch joint of an Example. (A) is a front view, (b) is an enlarged view for enlarging and explaining the A part of (a).

Explanation of symbols

1, 1A Communication pipe branch joint 2 Saddle part 21 Notch groove 3, 4 Branch part 31, 41 Swelling part 5 Communication pipe 53, 54 Opening 61 Cable 62 Branch cable

Claims (5)

A communication pipe branch joint in which a saddle part joined to a communication pipe containing a cable and a branch part containing a branch cable branched from the cable are provided integrally,
The branching portion is provided so as to face in a substantially horizontal direction in a state of being joined to the communication pipe, and is arranged on both sides of the communication pipe so as to be shifted from each other in the axial direction of the communication pipe. Communication pipe branch joint.   The branching portion is provided with a bulging portion that is smoothly connected to the inner surface of the communication tube in a state of being joined to the communication tube, on the inner surface of the side that is connected to the communication tube at an obtuse angle. The communication pipe branch joint according to claim 1.   3. The notch groove is provided in the saddle portion between the branch portions arranged on both sides of the communication pipe, and is continuously provided in the axial direction of the communication pipe. The communication pipe branch joint described.   An opening is provided corresponding to the branch portion of the communication pipe branch joint according to any one of claims 1 to 3, and the communication pipe branch joint is attached so that the branch portion is aligned with the opening. A communication tube characterized in that The communication tube according to claim 4, wherein the openings are provided separately from each other in the axial direction of the communication tube corresponding to each of the branch portions arranged on both sides.

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