JP2016135052A - Threading device for cable multiple laying - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a threading device for cable multiple laying, capable of enabling a threading rod to easily draw a linear body while preventing the linear body from being entangled in an existing cable, even in a state in which the threading rod is entangled in the existing cable.SOLUTION: A threading device for cable multiple laying 1 to be used in constructing cables C in a multiple manner in a pipe line P comprises: a cylindrical head part 10 comprising a cable insertion hole 30 into which a cable C already constructed in the pipe line P is to be inserted; a main body part 20 that is formed in a cylindrical shape coaxially with the head part 10 and is connected to the head part 10 so as to be relatively rotatable around an axial center of the cable insertion hole 30; a threading rod connection part 15 which is provided in the head part 10 and to which a threading rod S1 passed in the pipe line P is to be connected; and a linear body connection part 23 which is provided in the main body part 20 and to which a linear body S2 to be passed in the pipe line P is to be connected.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable multi-laying through device used for laying cables in a multi-line in a pipeline.

  The work of laying a cable such as an optical fiber cable in a conduit such as a cable accommodating pipe buried in the ground or a cable accommodating pipe provided in a wall of a building such as a building has been conventionally performed in a flexible linear shape. It has been carried out using a wiring device provided with a wiring string or a blower type wiring device.

  For example, in Patent Document 1, a linear wire string (rod) having flexibility is inserted from one opening end of a pipe line toward the other opening end, and the wiring reaching the other opening end is inserted. A technique is described in which a cable is connected to the leading end of a string and then the wire string is pulled out from the pipe line so that the cable is pulled by the line string and passed through the pipe line.

  Further, for example, in Patent Document 2, a pulling member formed in a parachute shape is attached to the leading end of a wire string, and the pulling member is directed from one opening end to the other opening end of the duct by air blowing using a blower. By connecting the cable to the tip of the wire string that reaches the other end of the pipeline along with the pulling member, by pulling the cable from the pipeline, the cable is pulled by the wire string and inside the pipeline The technology is designed to be connected to the line.

JP 2012-147668 A JP 2003-244814 A

  In recent years, there has been an increase in multi-laying in which cables are laid in multiple lines in one pipe line. When laying a plurality of cables in a pipe line, an operation of further passing the cable through a pipe line in which the cable is already laid is performed.

  However, in the technique shown in Patent Document 1, since the wire string is wound and accommodated on a reel, when the wire string rewound from the reel is inserted into the duct, the wire string is caused by the winding rod. While drawing an arc, it may go through the pipeline and become entangled with the existing cable. Moreover, in the technique shown in Patent Document 2, the traction member advances through the gap portion in the pipeline, so if there is a portion floating on the existing cable from the inner surface of the pipeline, the traction member goes underneath. There is a case where the wire string is entangled with the existing cable by proceeding. Then, when the cable is connected to the line cord in a state of being entangled with the existing cable and the tow work is performed, the cable pulled by the line string proceeds along the same route as the line string and the existing cable As a result, the friction between the cables increases, which increases the tension to be applied to the wire string and makes it difficult to pull the cable.

  An object of the present invention is to solve such a problem, and the object of the present invention is to provide a linear body with the wiring string even when the wiring string is entangled with an existing cable. It is an object of the present invention to provide a cable multi-laying wiring device that can be easily pulled without being entangled with the cable.

  The cable multi-laying laying device of the present invention is a cable multi-laying laying device used when laying a cable in multiple lines in a pipeline, and has already been laid in the pipeline. A cylindrical head portion having a cable insertion hole through which a cable is inserted, and a cylindrical shape coaxial with the head portion, are connected to the head portion so as to be relatively rotatable about the axis of the cable insertion hole. A main body part, a wire string connecting part provided in the head part and connected to a wire string passing through the pipe line, and provided in the main body part and passing through the pipe line. A linear body connecting portion to which the linear body to be connected is connected.

  The cable multi-laying wiring device according to the present invention is characterized in that, in the above-described configuration, the head portion and the main body portion are configured in a cylindrical shape by combining a pair of half-cylinders in a severable manner. To do.

  In the cable multi-laying laying device according to the present invention, in the above configuration, at least one of a rotational sliding portion of the head portion with the main body portion and a rotational sliding portion of the main body portion with the head portion is provided. It is formed of a self-lubricating material.

  The cable multi-laying wiring device according to the present invention is characterized in that, in the above configuration, the head portion and the main body portion are connected to each other so as to be relatively rotatable using a rolling bearing.

  In the above-described configuration, the cable multi-laying wiring device according to the present invention has a posture detection unit that detects a posture in the rotation direction of the main body, an electric motor that rotationally drives the main body with respect to the head, and And a control unit that controls the operation of the electric motor so that the main body unit always has a predetermined attitude in the rotation direction based on a detection result of the attitude detection unit.

  In the cable multi-strip laying device of the present invention, in the above configuration, the control unit includes a first microswitch for rotating the electric motor in a normal direction and a second microswitch for rotating the electric motor in a reverse direction. Consists of a forward / reverse rotation circuit, and the posture detection unit is swingably supported by the main body by a support shaft, and the main body rotates about a predetermined angle to one side in the rotation direction with respect to a predetermined posture. To the one side to operate the first micro switch, and when the main body rotates by a predetermined angle to the other side in the rotation direction with respect to the reference posture, the first micro switch rotates toward the other side. It is composed of a weight that moves to actuate the second microswitch.

  In the cable multi-strip laying device according to the present invention, in the above configuration, the posture detection unit is a tilt sensor, and the control unit includes a switching element that operates in response to an input from the tilt sensor. It is a rotating circuit.

  In the above-described configuration, the cable multi-laying wiring device of the present invention is characterized in that a protrusion protruding from the outer peripheral surface is provided on the outer peripheral surface of the main body.

  According to the present invention, even when the wire string is entangled with the existing cable, the head portion pulled by the wire string freely rotates around the cable, so It is possible to maintain the posture in the rotational direction at a constant value and allow the wire connected to the main body portion to pass through the cable in parallel without being entangled with the existing cable. Therefore, even when the wire string is entangled with the existing cable, the wire body can be easily pulled without being entangled with the existing cable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a cable multi-laying wiring device that is an embodiment of the present invention. It is a front view of the cable multi-laying wiring device shown in FIG. It is sectional drawing which follows the AA line | wire of the cable multi-laying wiring apparatus shown in FIG. It is sectional drawing in alignment with the BB line of the cable multiple line | wire installation apparatus shown in FIG. (A) which shows the modification of the head part shown in FIG. 1 is a side view, (b) is a rear view. FIG. 9 is a modified example of the cable multi-laying wiring device shown in FIG. 1, and is an explanatory diagram showing a case where the posture of the main body is controlled using an electric motor. (A) is a circuit diagram which shows an example at the time of making the control part shown in FIG. 6 into a mechanical type, (b) is explanatory drawing which shows the structure of the attitude | position control part in the figure (a). It is a circuit diagram which shows an example at the time of making the control part shown in FIG. 6 into an electronic type. (A), (b) is explanatory drawing which shows the state of the wiring string previously each wired by the pipe line. It is explanatory drawing which shows the procedure which arrange | positions the existing cable in a pipe line in the cable penetration hole of the cable multi-laying | laying-through wiring apparatus. It is explanatory drawing which shows the state which connected the existing line string and the new line string in the pipe line to the cable multi-laying wiring apparatus in which the existing cable was arrange | positioned in the pipe line at the cable insertion hole. It is explanatory drawing which shows the state which pulled the cable multiple line | wire installation apparatus by the existing wiring string in the pipe line from the state shown in FIG. 11, and made the new wiring string in the pipe line. It is a modification of the cable multi-laying wiring device shown in FIG. 1 and shows a case where a protrusion is provided on the main body, (a) is a side view, (b) is a plan view, and (c) is a front view. It is. It is explanatory drawing which shows the mode of the wiring operation | work using the cable multi-laying wiring apparatus shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 is a cable housing provided in a wall of a building such as a cable housing pipe or a building buried in the ground. It is used when laying cables such as optical fiber cables in multiple lines (2 or more) in pipes such as pipes. More specifically, the wiring device 1 allows a new wiring string for passing a new cable in the pipeline where the cable is already laid, to be parallel to the existing cable. it can. Or the wiring apparatus 1 can make a new cable pass in parallel with the existing cable in the pipe line where the cable is already laid.

  In addition, the wiring apparatus 1 can be used not only when laying optical fiber cables in multiple lines in a pipeline but also when laying other cables such as energizing cables in multiple lines in a pipeline.

  As shown in FIG. 1 to FIG. 4, the wiring device 1 includes a head unit 10 and a main body unit 20.

  The head portion 10 is formed in a cylindrical shape having an outer diameter that can be inserted into the pipe line by, for example, a resin material or a metal material. In the present embodiment, the head portion 10 is formed in a cylindrical shape from polyacetal resin (POM). The head portion 10 has a curved shape in which the diameter of the tip portion is reduced toward the tip side, thereby suppressing the tip portion of the head portion 10 from being caught by another member in the pipe line.

  The head unit 10 has a configuration in which a pair of upper and lower half cylinders 11 and 12 are combined so as to be split. In the present embodiment, the half cylinders 11 and 12 constituting the head portion 10 are each formed in a semicylindrical shape, and the pair of half cylinders 11 and 12 have the same shape.

  As shown in FIG. 3, the pair of half cylinders 11 and 12 are detachably assembled to each other using bolts 13 and nuts 14 at a pair of flange portions 11 a and 12 a provided on both ends in the circumferential direction. Yes. Thus, the head unit 10 is configured by detachably combining the pair of half cylinders 11 and 12, and by releasing the fastening by the bolt 13 and the nut 14, It can be easily disassembled.

  The head portion 10 is provided with a pair of wire string connecting portions 15. In the case shown in the figure, one wire string connecting portion 15 is provided in one half cylinder 11 and the other wire string connecting portion 15 is provided in the other half cylinder 12. Each of these wire string connecting portions 15 is configured as a connection hole, and can be connected to a wire string that is routed in the pipeline. By connecting a wire string that has been previously passed through the pipe line to a wire string connecting part 15 provided in the head part, the wire line device 1 can be pulled in the pipe line by the line string. .

  The main body portion 20 is formed in a cylindrical shape coaxial with the head portion 10 by using, for example, a resin material or a metal material. In the present embodiment, the main body portion 20 is formed in a cylindrical shape having the same outer diameter as that of the head portion 10 from polyacetal resin. The rear end portion of the main body portion 20 has a curved shape that decreases in diameter toward the rear end side, like the front end portion of the head portion 10.

  The main body portion 20 is also configured to divide and combine a pair of upper and lower half cylinders 21 and 22. In the present embodiment, the half cylinders 21 and 22 constituting the main body 20 are each formed in a semicylindrical shape, and the pair of half cylinders 21 and 22 have the same shape.

  As in the case of the head portion 10 shown in FIG. 3, the pair of half-cylinder bodies 21 and 22 are mutually connected by using bolts 13 and nuts 14 at the four flange portions 21 a and 22 a provided at both ends in the circumferential direction. Removably assembled. Thus, the main body 20 is configured by detachably combining the pair of half cylinders 21 and 22, and by releasing the fastening by the bolt 13 and the nut 14, It can be easily disassembled.

  In the present embodiment, the semi-cylindrical bodies 11 and 12 constituting the head portion 10 and the semi-cylindrical bodies 21 and 22 constituting the main body portion 20 have the same shape in the vertical direction, but are not limited thereto. One half-cylinder 11, 21 may have a shape having an arc-shaped cross section with an angle of 180 degrees or more, and the other half-cylinder 12, 22 may have a shape having an arc-shaped cross section with an angle of 180 degrees or less. . Further, the half cylinders 11 and 12 constituting the head portion 10 and the half cylinders 21 and 22 constituting the main body portion 20 are replaced with bolts 13 and nuts 14 respectively, and other fixing members such as clips and buckles, for example, are used. It can also be set as the structure assembled | attached so that attachment or detachment is possible.

  The main body portion 20 is provided with a pair of linear body connection portions 23. In the illustrated case, one linear body connecting portion 23 is provided in one half-cylinder 21, and the other linear body connecting portion 23 is provided in the other half-cylinder 22. Each of these linear body connecting portions 23 is configured as a connection hole, and from now on, it becomes possible to connect a linear body such as a new wire string or a new cable that passes through the pipeline. Yes. A linear body to be connected to the inside of the pipe line is connected to the linear body connection portion 23 provided in the main body portion 20, and in this state, the wiring cord connected to the wiring cord connection portion 15 of the head portion 10 is used. By pulling the wiring device 1 from one opening end of the pipeline toward the other opening end, the linear body can be passed through the pipeline.

  The inside of the head part 10 and the main body part 20 each formed in a cylindrical shape is a cable insertion hole 30 extending along these axial centers. That is, the cable insertion hole 30 penetrating through the axial center of the wiring device 1 in the axial direction is provided. The cable insertion hole 30 is formed to have an inner diameter larger than the outer diameter of the cable laid in the pipe line, and when the line device 1 is pulled through the pipe line by the line cord, An already laid cable can be inserted into the cable insertion hole 30. That is, the wiring device 1 can arrange | position the cable already laid in the pipe line in the axial center, and is the structure pulled in the pipe line along the said cable in this state.

  Although the diameter of the cable insertion hole 30 can be arbitrarily set, in this embodiment, the diameter of the cable insertion hole 30 is set to 36 mm so as to be compatible with a 31 mm optical fiber cable. In addition, although the outer diameter of the wiring apparatus 1 in this Embodiment is 66 mm and a full length is 230 mm, when considering the bending of a pipe line etc., it is preferable that a full length shall be 230 mm or less.

  The main body 20 is connected to the head 10 so as to be relatively rotatable about the axis of the cable insertion hole 30. That is, in the wiring device 1 of the present invention, the head unit 10 to which the towed wiring string is connected can freely rotate with respect to the main body unit 20 to which the linear body to be newly connected is connected. It can be configured. As a result, even if the head unit 10 pulled by the wire string rotates around its axis in the pipe line, the main body unit 20 to which the linear body to be newly connected is connected in a predetermined posture, that is, towed. It is possible to maintain the initial posture (the posture when towing is started).

  In order to connect the head portion 10 and the main body portion 20 so as to be relatively rotatable, a connecting boss 24 that protrudes toward the head portion 10 is provided on one side in the axial direction of the main body portion 20. The connecting boss portion 24 includes an annular connecting convex portion 25 protruding outward in the radial direction on the outer peripheral surface thereof. In the case shown in the figure, the connecting convex portion 25 is formed in a trapezoidal cross section having a pair of side surfaces 25a and 25b inclined with respect to the radial direction and a top surface 25c parallel to the axial direction.

  On the other hand, an annular engagement groove 16 that is recessed toward the radially outer side is provided on the inner peripheral surface of the head portion 10. The engagement groove 16 has a cross-sectional shape corresponding to the connection convex portion 25 of the main body portion 20, and one end of the head portion 10 is fitted from the axial direction to the outside of the connection boss portion 24. The connection convex part 25 is connected to the main body part 20 by engaging. The engaging groove 16 and the connecting convex portion 25 are slidable in the rotation direction, so that the head portion 10 and the main body portion 20 are rotatable relative to each other about the axis of the cable insertion hole 30. Has been.

  In addition, the connection structure of the head part 10 and the main-body part 20 is not restricted to the said structure, The structure which can connect the head part 10 and the main-body part 20 so that relative rotation is possible centering | focusing on the axial center of the cable penetration hole 30. If so, various structures can be employed.

  In order to prevent the main body portion 20 from rotating together with the head portion 10 during towing, it is preferable to employ a configuration that reduces the rotational resistance between the head portion 10 and the main body portion 20 at the connecting portion.

  For example, by forming at least one of the rotational sliding part with the main body part 20 of the head part 10 and the rotational sliding part with the head part 10 of the main body part 20 by using a self-lubricating material, A configuration that reduces rotational resistance between the main body 20 and the main body 20 can be employed. For example, in the present embodiment, the engagement groove 16 that is a rotational sliding portion with the main body portion 20 of the head portion 10 and the connecting convex portion 25 that is a rotational sliding portion with the head portion 10 of the main body portion 20 are either In addition, since it is made of polyacetal resin, which is a self-lubricating material, together with the head portion 10 and the main body portion 20, the rotational resistance between the head portion 10 and the main body portion 20 can be reduced.

  In the present embodiment, both the engaging groove 16 and the connecting convex portion 25 are made of polyacetal resin, which is a self-lubricating material. Only one of them may be formed of a self-lubricating material, and either one of the engaging groove 16 and the connecting convex portion 25 may be formed of a metal such as steel or other resin.

  The self-lubricating material is not limited to polyacetal resin (POM), but other resin materials such as polyamide and polytetrafluoroethylene, and oil-impregnated porous materials such as growth cast iron and synthetic resin impregnated with oil, etc. Can also be used.

  Here, as will be described later, since the line device 1 is pulled by the line string with the head portion 10 as the front side, the rear side (the right side in FIG. 4) of the connecting convex portion 25 is to be pulled. One side surface 25b facing is strongly slidably in contact with the inner surface of the engagement groove 16. Accordingly, only one of the side surface 25b facing the rear side of the connecting convex portion 25 and the inner surface of the engagement groove 16 facing the side surface 25b may be formed of a self-lubricating material. By adopting such a configuration, it is possible to obtain the same effect as the case where the entire connecting convex portion 25 and the engaging groove 16 are formed of the self-lubricating material while reducing the amount of the self-lubricating material used.

  Moreover, in order to reduce the rotational resistance between the head part 10 and the main-body part 20, the structure which connected the head part 10 and the main-body part 20 so that relative rotation was possible using a rolling bearing is also employable. FIG. 5 shows a case where a rolling bearing (ball bearing) 33 having a plurality of (six) balls (rolling elements) 32 rotatably held by a holder 31 is provided in the engaging groove 16 of the head unit 10. Show. In this case, the rolling bearing 33 is provided on the inner surface of the rear end side (right side in FIG. 5) of the engagement groove 16 that is a side that transmits the traction force to the connection convex portion 25 during traction. They are arranged at equal intervals in the circumferential direction, protrude from the holder 31 toward the inside of the engagement groove 16, and come into contact with the side surface 25 b on the rear end side of the connecting convex portion 25. Thereby, the connection convex part 25 can be rotatably supported by the some ball | bowl 32, and the rotational resistance between the head part 10 and the main-body part 20 at the time of towing can be reduced.

  The rolling bearing 33 is not limited to one using a plurality of balls 32 as a rolling element, and for example, one using a plurality of needles as a rolling element (needle bearing) can also be used. The holder 31 and the ball 32 are preferably made of metal such as steel, but can be made of resin.

  In the modification shown in FIG. 5, the flange portion 11 a is provided only in the half cylinder 11, and the bolt 13 inserted through the flange portion 11 a is directly screwed to the other half cylinder 12 to be paired with the pair of half cylinders 11. , 12 are detachably assembled. Further, in the modification shown in FIG. 5, in order to pull the wire connection device 1 straight by one wire string, a ring portion 34 for connecting the wire string is intermediately connected to the pair of wire string connection portions 15. The wire 35 provided for the position is connected.

  As described above, the self-lubricating material or the rolling bearing 33 is used for the connecting portion between the head portion 10 and the main body portion 20 to reduce the rotational resistance between the head portion 10 and the main body portion 20. Even if it rotates around the axis of the cable insertion hole 30 in the pipeline, the main body 20 is prevented from co-rotating with the head 10 and the main body 20 is more reliably in a predetermined posture, that is, the initial stage of traction. Can be maintained.

  In order to maintain the main body 20 in a predetermined posture more reliably at the time of towing, one half cylinder 22 constituting the lower half of the pair of half cylinders 21 and 22 constituting the main body 20 is a steel material. The other half-cylindrical body 21 constituting the upper half may be made of a lightweight resin having a density lower than that of the steel material. Thereby, the main body 20 autonomously holds the posture in the rotational direction so that the half cylinder 22 made of steel is on the lower side, and the lighter resin half cylinder 21 is always on the upper side. Therefore, even when the head portion 10 rotates around the axis of the cable insertion hole 30 in the conduit during towing, the main body portion 20 can be more reliably maintained in the initial towing posture.

  In addition, if the lower half cylinder 22 which comprises the main-body part 20 can be made heavier than the upper half cylinder 21, the pair of half cylinders 21 and 22 each formed with the same resin material, for example Of these, the same effect as described above can be obtained by attaching a weight formed of steel or the like only to the lower half-cylinder 22.

  As shown as a modified example in FIG. 6, the wiring device 1 of the present invention may be configured to positively control the posture of the main body 20 using the electric motor 40. In this case, a control unit 41 is connected to the electric motor 40, and an attitude detection unit 42 is connected to the control unit 41.

  The electric motor 40 can be disposed in the head unit 10 or the main body unit 20, but either the head unit 10 or the main body unit 20 is provided with a rotor (rotor) that constitutes the electric motor 40, and the head unit 10 and the main body unit 20. It can also be set as the structure which provided the stator (stator) which comprises the electric motor 40 in any one of the parts 20. FIG. In the illustrated case, a case where the electric motor 40 is arranged in the main body 20 is shown. The electric motor 40 may be configured to be integrally provided with a speed reduction mechanism such as a planetary gear mechanism. Although not shown in detail, the electric motor 40 is connected to the head unit 10 through a gear mechanism or the like, and rotationally drives the main body unit 20 around the axis of the cable insertion hole 30 with respect to the head unit 10. Can do.

  The attitude detection unit 42 can detect the attitude of the rotation direction around the axis of the cable insertion hole 30 of the main body 20.

  On the other hand, based on the detection result of the posture detection unit 42, that is, the posture of the main body unit 20 detected by the posture detection unit 42, the control unit 41 always causes the main body unit 20 to assume a predetermined posture in the rotation direction, that is, an initial traction posture. The operation of the electric motor 40 is controlled.

  With such a configuration, even when the main body unit 20 rotates together with the head unit 10 and rotates in the pipeline during towing, the posture detection unit 42 detects a change in the posture of the main body unit 20 due to the rotation. By operating the electric motor 40 so as to correct the posture change, the main body portion 20 can always be maintained in the initial pulling posture.

  For example, the control unit 41 may have a mechanical configuration as shown in FIG. In this case, the control unit 41 is configured as a forward / reverse rotation circuit including a first micro switch 44 and a second micro switch 45 between the electric motor 40 and the power source 43.

  The first micro switch 44 includes a pair of open / close switches 44a and 44b that are opened / closed simultaneously. When the first micro switch 44, that is, the pair of open / close switches 44a and 44b, is turned on, the electric motor 40 rotates in the normal direction. It has become. The second micro switch 45 includes a pair of open / close switches 45a and 45b that are opened / closed simultaneously. When the second micro switch 45, that is, the pair of open / close switches 45a and 45b is turned on, the electric motor 40 reverses. It is like that.

  On the other hand, as shown in FIG. 7B, the posture detection unit 42 includes a weight 47 formed in a triangular shape by a steel plate or the like. The weight 47 is swingably supported by the main body 20 by the support shaft 46 in the vicinity of the upper corner thereof, and when the main body 20 rotates about the cable insertion hole 30, the weight 47 swings about the support shaft 46. It has become.

  When the main body 20 rotates by a predetermined angle to one side in the rotation direction with respect to a predetermined posture, the weight 47 rotates toward the one side, and the first micro switch 44 is operated on one side thereof. That is, when the main body 20 rotates to one side, the first micro switch 44 is turned on by the weight 47. As a result, the electric motor 40 operates in the forward rotation direction, and the main body portion 20 is rotationally driven by the electric motor 40 in a direction to correct the posture change, and is maintained in a predetermined posture.

  On the contrary, when the main body portion 20 is rotated by a predetermined angle to the other side in the rotation direction with respect to a predetermined posture, the weight 47 is rotated toward the other side, and the second micro switch 45 is turned on the other side. Operate. That is, when the main body 20 rotates to the other side, the second micro switch 45 is turned on by the weight 47. As a result, the electric motor 40 operates in the reverse direction, and the main body 20 is rotationally driven in a direction to correct the posture change by the electric motor 40 and is maintained in a predetermined posture.

  In the illustrated case, the weight 47 has a triangular shape. However, the weight 47 may have various shapes as long as it is supported by the support shaft 46 so as to be swingable and can turn on the micro switches 44 and 45. be able to.

  For example, the control unit 41 may have an electronic configuration as shown in FIG. In this case, the control unit 41 is configured as a forward / reverse rotation circuit including four switching elements 48 a to 48 d between the electric motor 40 and the power source 43. As these switching elements 48a-48d, semiconductor elements, such as photocoupler MOS FET, can be used, for example.

  In the electronic control unit 41, tilt sensors (tilt sensors) 49 a to 49 c are used as the posture detection unit 42. As the tilt sensors 49a to 49c, for example, mercury type sensors can be used. The tilt sensors 49a to 49c can detect a change in posture in the rotational direction around the cable insertion hole 30 of the main body 20, and can output the detection result as an electrical signal.

  In the electronic control unit 41, when the main body unit 20 is rotated by a predetermined angle to one side in the rotation direction with respect to a predetermined posture, the rotation is detected by the tilt sensors 49a to 49c, and switching is performed based on the detection result. The on / off of the elements 48a to 48d is controlled to operate the electric motor 40 in the forward rotation direction, and the main body 20 is rotationally driven by the electric motor 40 in a direction to correct the posture change and is maintained in a predetermined posture.

  On the other hand, when the main body 20 rotates by a predetermined angle to the other side in the rotation direction with respect to a predetermined posture, the rotation is detected by the tilt sensors 49a to 49c, and the switching elements 48a to 48d are turned on based on the detection result. The electric motor 40 is operated in the reverse direction by being controlled to be turned off, and the main body 20 is rotationally driven by the electric motor 40 in a direction to correct the posture change and is maintained in a predetermined posture.

  Note that the tilt sensors 49a to 49c are not limited to mercury type sensors, and sensors having other configurations may be used as long as the detection results can be output as electrical signals.

  Moreover, as the attitude | position detection part 42 used for the electronic control part 41, not only the tilt sensors 49a-49c but a gyroscope can also be used.

  Next, a method of using the line connecting device 1 in the work of laying cables in the pipe in multiple lines will be described.

  First, the wire string S1 is routed in advance in the pipe P where the cable C is already laid. For example, the wiring line S1 can be routed through the pipe P while the flexible line S1 is unwound from the reel without using the line device 1 of the present invention. It is possible to carry out in various directions, for example, by feeding the wire string S1 with the traction member attached to the tip using a blower type wire device.

  As shown in FIG. 9 (a), the wire string S1 passed through in this way becomes entangled so as to be wound around the cable C already laid in the pipe P, or FIG. As shown in b), the cable C may be entangled so as to pass through the lower side of the cable C. By using the wiring device 1 of the present invention, a pipe line in which the cable C is laid in advance is used. A new wire string S2 can be passed through P in parallel with the cable C.

  As shown in FIG. 10, the head portion 10 is disassembled into half cylinders 11 and 12, and the main body portion 20 is disassembled into half cylinders 21 and 22. After the cable C already laid in the pipe P is arranged between the half cylinders 11 and 12 and the half cylinders 21 and 22 again, the cable C is inserted into the cable passing device 1. The hole 30 is inserted.

  In this way, by passing the cable C laid in the pipe P through the cable insertion hole 30, the wiring device 1 can be moved along the cable C in the pipe P. Further, since the head unit 10 and the main body unit 20 are configured to be disassembled, the operation of the cable C of the cable insertion hole 30 can be easily performed.

  Next, the wire string S1 previously connected in the pipe line P is connected to the wire string connecting part 15 provided in the head unit 10, and the wire string S2 newly connected to the pipe line P is connected. Is connected to the linear body connecting portion 23 of the main body portion 20. These operations are performed at the opening end on the side opposite to the one opening end of the pipe line P serving as the insertion port of the wire string S1 on the pulling side.

  Next, the wire string S1 wired in the pipe line P is pulled out from the line P, and as shown in FIG. 11, the line device 1 is pulled by the wire string S1 along the existing cable C. The pipe P is moved. When the line device 1 is pulled in the pipe line P by the line string S1, the new line string S2 connected to the main body 20 is also pulled together with the line device 1 and is passed through the line P. To go.

  At this time, since the head unit 10 can be freely rotated with respect to the main body unit 20, the head unit 10 reaches a portion entangled with the cable C of the wire string S <b> 1 and is installed together with the wire string S <b> 1. Even if it rotates about the cable C, the main body portion 20 does not rotate with the head portion 10 and is maintained in a predetermined posture, that is, an initial traction posture. Therefore, even if the head unit 10 is pulled while rotating around the existing cable C together with the wire string S1, the main body unit 20 is always pulled while maintaining the initial pulling posture, and the new wire string S2 is As shown in FIG. 12, the cable is passed straight in parallel with the existing cable C.

  When the wiring device 1 reaches the other end of the pipe P and a new wiring string S2 is passed through the entire pipe P, a cable newly laid in the pipe P at the tip of the wiring string S2 Are connected and pulled through the cable P by pulling the cable through the wire string S2. At this time, since the wire string S2 on the pulling side is routed in parallel to the cable C laid in the pipe P, a new cable is connected to the existing cable C by the wire string S2. It can be easily connected with a small tension (traction force) without entanglement.

  In the above embodiment, a new wire string S2 is connected to the linear body connecting part 23 of the main body 20 of the wire line device 1, and the new wire string S2 is passed in parallel with the existing cable C. Then, a new cable is pulled by the wire string S2 and the cable is laid in the pipe P in parallel with the existing cable C. It is also possible to connect a new cable to the line 23 and connect the new cable directly into the pipeline P. Also in this case, the new cable is parallel to the existing cable C without causing the new cable to be entangled with the existing cable C in the pipeline P by the wiring device 1 pulled by the wiring string S1. Therefore, the new cable can be easily passed with a small tension.

  As shown in FIG. 13 as a modified example, the wire passing device 1 of the present invention may be configured such that a protrusion 50 protruding from the outer peripheral surface is provided on the outer peripheral surface of the main body portion 20. FIG. 13 shows a case where a pair of protrusions 50 projecting radially outward from the outer peripheral surface of the half cylinder 21 are provided on the outer peripheral surface of one half cylinder 21 constituting the main body 20. In this case, the wiring device 1 is inserted into the pipe line P with the pair of protrusions 50 facing upward.

  In the illustrated case, the pair of protrusions 50 extend along the axial direction of the cable insertion hole 30 and have a shape in which the protruding height gradually increases from the head 10 side toward the rear side of the main body 20. They are formed and arranged side by side with a predetermined interval in the circumferential direction. In addition, the pair of protrusions 50 have a rounded shape as a whole, such as a vertex portion formed on a curved surface. By forming the pair of protrusions 50 in such a shape, even when the main body portion 20 is provided with the protrusions 50, the protrusions 50 are stepped in the pipe line P when the wiring device 1 is moved in the pipe line P. It is possible to prevent it from being caught by the like.

  By providing such a protrusion 50 on the main body 20, for example, even when the cable C laid in the pipe P has a curved portion, the curved portion of the cable C The head unit 10 can be reliably rotated with respect to the main body unit 20 when the wiring device 1 moves along the pipe line P along the line P 1.

  That is, when the projection 50 is not provided on the main body portion 20, when the cable C installed in the pipe line P is bent up and down, the wiring device 1 causes the end portion of the bending of the cable C to face downward. At this time, the outer peripheral surface of the head portion 10 strongly contacts the lower inner peripheral surface of the pipe P, and a large bending force is applied between the head portion 10 and the main body portion 20. It will be. Therefore, the frictional resistance in the rotational direction of the head portion 10 with respect to the main body portion 20 increases, the main body portion 20 rotates together with the head portion 10 that rotates to eliminate the entanglement, and the wire string S2 may be entangled with the cable C. .

  On the other hand, when the projection 50 is provided on the main body 20, the projection 50 is formed on the pipe P when the wire passing device 1 passes through the terminal end of the cable C as shown in FIG. 14. Abutting on the inner peripheral surface on the upper side, the wiring device 1 is maintained in a substantially horizontal posture without being in a downward posture. Therefore, the head portion 10 can reliably rotate with respect to the main body portion 20 without strongly contacting the inner peripheral surface of the pipe line P. As described above, by providing the main body 20 with the protrusion 50, even when the cable C is curved, the head 10 is reliably rotated with respect to the main body 20, and the wire string S2 Can be passed straight in parallel with the existing cable C.

  In addition, it is preferable that the protrusion 50 is set to a height at which the contact with the inner peripheral surface on the upper side of the pipe P is maintained even when the wiring device 1 reaches the end portion of the curve of the cable C.

  Further, the protrusion 50 is not limited to the shape shown in FIG. 13, and can have various shapes, and further, for example, can be configured to include a rolling element such as a roller.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the above-described embodiment, a new wire string S2 or a new cable is illustrated as a linear body that is connected to the linear body connecting portion 23 provided in the main body portion 20 and is connected to the pipeline P. However, the present invention is not limited to this, and any other linear body such as a flexible tube may be used as long as it is connected to the pipe P.

  Further, in order to further reduce the tension required for pulling the wiring device 1, a rolling element such as a roller is provided on the inner peripheral surface of the cable insertion hole 30, or the inner peripheral surface of the cable insertion hole 30 is lowered. A structure formed of a friction material can also be used.

  Further, in order to further reduce the tension required for pulling the wire-liner device 1, the outer peripheral surfaces of the head portion 10 and the main body portion 20 are provided with rolling elements such as rollers, or the head portion 10 and the main body portion 20 It can also be set as the structure which formed the outer peripheral surface with the low friction material.

  Further, when the posture of the main body 20 is controlled by the electric motor 40, the control unit 41 is not limited to the circuits having the configurations shown in FIGS. 7 and 8, but may employ various configurations or circuits. it can.

DESCRIPTION OF SYMBOLS 1 Cable multiple line | wire installation apparatus 10 Head part 11 Half cylinder 11a Flange part 12 Half cylinder 12a Flange part 13 Bolt 14 Nut 15 Connection string connection part 16 Engagement groove 20 Main part 21 Half cylinder 21a Flange part 22 Half cylinder 22a Flange part 23 Linear body connection part 24 Connection boss 25 Connection convex part 25a, 25b Side surface 25c Top surface 30 Cable insertion hole 31 Holder 32 Ball 33 Rolling bearing 34 Ring part 35 Wire 40 Electric motor 41 Control part 42 Attitude detection unit 43 Power supply 44 First micro switch 44a, 44b Open / close switch 45 Second micro switch 45a, 45b Open / close switch 46 Support shaft 47 Weight 48a-48d Switching element 49a-49c Tilt sensor 50 Projection C Cable P Pipe line S1 , S2 line cord

Claims (8)

A cable multi-laying passage device used when laying a cable in multiple lines in a pipeline,
A cylindrical head portion having a cable insertion hole through which a cable already laid in the conduit is inserted;
A body portion that is formed in a cylindrical shape coaxial with the head portion, and is connected to the head portion so as to be relatively rotatable around the axis of the cable insertion hole;
A wire string connecting portion that is provided in the head portion and connected to a wire string that is passed through the pipe line;
A wire multi-laying wiring device, comprising: a linear body connecting portion that is provided in the main body portion and connected to a linear body that passes through the conduit.   2. The cable multi-laying wiring device according to claim 1, wherein the head portion and the main body portion are each configured in a cylindrical shape by combining a pair of half cylinders so as to be split.   The at least any one of the rotation sliding part with the said main-body part of the said head part and the rotation sliding part with the said head part of the said main-body part is formed with the self-lubricating material. The cable multi-laying wiring device according to 2.   The cable multi-laying wiring device according to any one of claims 1 to 3, wherein the head portion and the main body portion are connected to each other so as to be relatively rotatable using a rolling bearing. An electric motor that rotationally drives the main body with respect to the head; and
A posture detection unit that detects a posture in a rotational direction around the axis of the cable insertion hole of the main body unit;
5. The control unit according to claim 1, further comprising: a control unit configured to control the operation of the electric motor so that the main body unit always has a predetermined posture in a rotation direction based on a detection result of the posture detection unit. The cable multi-laying wiring device according to any one of the preceding claims. The control unit is configured by a forward / reverse rotation circuit including a first micro switch for rotating the electric motor in a forward direction and a second micro switch for rotating the electric motor in a reverse direction,
The posture detection unit is swingably supported by the main body by a support shaft, and rotates toward the one side when the main body rotates by a predetermined angle in one direction of rotation with respect to a predetermined posture. The first micro switch is actuated to operate, and when the main body rotates by a predetermined angle to the other side of the rotation direction with respect to the reference posture, the second micro switch rotates to the other side. 6. The cable multi-laying wiring device according to claim 5, wherein the cable multi-laying wiring device is constituted by a weight for operating a switch. The posture detection unit is a tilt sensor;
The cable multi-laying wiring device according to claim 5, wherein the control unit is a forward / reverse rotation circuit including a switching element that operates in response to an input from the tilt sensor.   The cable multi-laying wiring device according to any one of claims 1 to 7, wherein a protrusion protruding from the outer peripheral surface is provided on the outer peripheral surface of the main body.

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