JP2000209725A - Cable feeding device and cable laying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To monitor tension accurately and easily without being affected by connecting fittings, a cable and the size of a drawing cable by subtracting friction drag force of external contact part reduced by a reducing part from reaction force to obtain the force which is regarded as tension, and by transmitting it to an external tension monitoring device via a transmitting part. SOLUTION: A messenger wire locking part 32 on which pulleys 32a, 32b, 32c of rotating bodies are mounted is provided so that a cable locking device can be locked with a messenger wire. The pulley 32c is structured in such a way as to move in upward and downward directions, enabling the wire to be easily installed. As a result, the locking part 32 functions as a reducing part which reduces friction drag force to be generated when the device itself moves by reaction force. In addition, a hole part 32d is provided in the locking part 32 and a rope for monitoring tension is tied so that reaction force generated in accordance with the tractive force of the cable is transmitted to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cable feeder for laying a cable and a cable laying method for laying a cable using the cable feeder.

[0002]

2. Description of the Related Art Cable feeders and cable laying methods for laying cables have been actively developed. The cable used for laying the cable has a predetermined maximum tension. If the cable is pulled beyond the maximum tension, the cable may be broken. Therefore, when the cable is fed, the cable is laid while measuring the tension of the cable so as not to exceed the maximum tension.

FIG. 27 is an explanatory diagram for explaining an example of a conventional cable laying method involving measurement of cable tension. FIG.
As shown in FIG. 7A, the messenger wire 500 is
It is stretched by a plurality of columns 510. The cable hanger 520 is fixed to the messenger wire 500 and
The number wheel 530 is suspended from the messenger wire 500. The cable 540 is connected to a tow rope 560 via a connection fitting 550. This tow rope 5
60 and cable 540 are connected to cable hangers 520 and 4
The vehicle is towed in the direction of arrow A by the towing device 570 while passing through the number wheel 530. Thus, the cable 540
Is laid.

Further, instead of the winding type traction device 570, as shown in FIG.
0 is placed, the traction device 580
60 is pulled in the direction of arrow B to pass through the towing device 580, and after passing through the towing rope 560, the cable 5
Send 40. Thus, the cable 540 is laid.

In the cable laying method shown in FIGS. 27A and 27B, the tension of the cable 540 is monitored.
A tension monitor 590 is used. This tension monitoring device 590
Is connected to the monitor device 610 via a communication cable 600, and the measured tension data is used as data for displaying a magnitude of the tension or performing a predetermined control process.

[0006]

However, the tension monitoring device 590 used in the conventional cable laying method pulls the tow rope 560 into the tension monitoring device 590, and a measuring unit (not shown) comes into contact with the outer periphery of the tow rope 560 to tension the cable. And the cable 540 and the connection fitting 550 exceeding the diameter of the tow rope 560 cannot be passed.

Before the cable 540 and the connection fitting 550 pass through the tension monitoring device 590, the worker stops the cable feed to avoid the cable 540 and the connection fitting 550 from passing through the tension monitoring device 590, It is necessary to set the tow rope 560 on the monitoring device 590 again and restart the cable feeding. However, such a wire drawing work has problems that workability is poor, work time is long, and work cost is high.

Further, when it is determined that the maximum tension is exceeded during the extension of the cable 540 of a long object (for example, 3000 m), all the cables 540 are defective and need to be replaced. Then, it is necessary to lay a new cable 540 again, and similarly, there is a problem that extra time and cost are required for the wire drawing work. For this reason, tension monitoring was indispensable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a cable feeder capable of accurately and easily monitoring a tension without being affected by the size of a connection fitting, a cable, and a tow rope. And a cable laying method.

[0010]

According to a first aspect of the present invention, there is provided a cable feeder, comprising: a gantry; a moving unit moving on the gantry; and a feeding unit moving the moving unit. A plurality of spindles at least one of which is rotatably supported on the gantry and the moving part, a plurality of wheels pivotally fixed to the plurality of fulcrums, and the gantry or the moving part, A first driving unit that supplies a driving force for rotationally driving at least one spindle, a first drive device that outputs a drive signal to the first drive unit, and a control that outputs the first drive device to the first drive device An input unit to which a signal is input, a control operation unit that reads out a control signal input to the input unit and outputs a control signal to the first drive device, and a friction at a position that is externally contacted to determine a posture. Reduction unit that reduces resistance , Characterized in that it and a transmission unit for transmitting to the outside as the tension force obtained by subtracting the frictional resistance force which is reduced by the reduction unit from the reaction force generated when pulling the cable. The tension obtained by subtracting the frictional resistance reduced by the reduction unit from the reaction force is used as the tension, and the tension is transmitted to an external tension monitoring device via the transmission unit, whereby accurate tension can be measured.

In this cable feeder, one support shaft may be supported by both the gantry and the moving part, and the cable may be fed by two wheels. In addition, one of the gantry and the moving part is pivotally supported by two spindles, and the other of the gantry and the moving part is pivotally supported by one spindle, and the cable is fed by three wheels. It may be performed. Two support shafts may be supported by the gantry or the moving unit, and the cable may be fed by four wheels. As described above, the number of wheels rotatably supported by the gantry or the transfer unit can be variously set, and can be appropriately selected when designing the cable feeder.

Further, the input unit transmits a control signal output from an external transmission device or another cable feed device operated by a worker at a remote location through a wired or wireless transmission path.
The receiving device may be a receiving device. Also, to enable direct input from workers near the cable feeder,
A key input device in which necessary keys are arranged may be used.

According to a second aspect of the present invention, there is provided the cable feeding device according to the first aspect, wherein the reduction unit is configured to hang the cable feeding device from the overhead line and move the same on the overhead line. A rotating body is provided.

According to a third aspect of the present invention, in the cable feeder according to the first aspect, the reduction unit includes a rotating body for moving the cable feeder on a plane or a rail. It is characterized by.

When the cable feeder is locked to the messenger wire, a frictional resistance is generated at the messenger wire locking portion that comes into contact with the messenger wire, which hinders accurate measurement of the tension. Therefore, a rotator is provided in the messenger wire locking portion, and the rotator is movably rotated on the messenger wire to reduce the frictional resistance. Similarly, when the cable feeder is mounted on a flat surface or a rail, a reduction unit that reduces the frictional resistance by enabling the rotating body to move smoothly on the flat surface is adopted. The frictional force can be reduced by the rotating body, and the tension can be accurately measured.

According to a fourth aspect of the present invention, there is provided the cable feeder according to any one of the first to third aspects, wherein the moving cable exceeds a predetermined cable feed speed. Alternatively, a ratchet mechanism is provided which cuts off transmission of rotational driving force between the wheel and the support shaft when the speed is lower than a predetermined cable feed speed. By interrupting the transmission of the rotational driving force under the predetermined condition by the ratchet mechanism, it is possible to avoid a cable feed exceeding a predetermined tension value.

According to a fifth aspect of the present invention, there is provided the cable feeder according to any one of the first to fourth aspects, wherein one of the gantry and the moving part is pivotally supported. In addition, a rotational driving force such that the rotational driving force supplied from the first driving unit is rotated in a reverse direction to at least one support shaft is rotatably supported on the other of the gantry and the moving unit. And a conversion drive unit for supplying the support shaft to the support shaft. The cable is sandwiched between at least two wheels, and at the position where the cable is sandwiched, the linear velocities on the outer periphery of the wheels are both rotating in the same direction. And the cable feeder which at least two wheels reliably transfer this pinched cable with constant tension can be provided.

According to a sixth aspect of the present invention, there is provided the cable feeder according to any one of the first to fifth aspects, wherein the supplied cable is located at a position sandwiched by the plurality of wheels. It is characterized by including a guiding portion for guiding. One guiding part is arranged only at the front of the wheel (cable sending side) or only at the rear (cable receiving side), or two guiding parts are arranged one by one before and after the wheel, or Alternatively, a total of four guide portions may be arranged in front of and behind the wheel, two each.

Further, the guiding portion may have a shape in which four rollers are combined in a substantially # -shape so that the cable passes through the central opening and is guided to a position where the two wheels sandwich the cable. The distance between the two rollers passed in the horizontal direction is substantially the same as or larger than the cable diameter, and the distance between the two rollers passed in the vertical direction is a large guiding portion exceeding the cable diameter. Is also good.

[0020] Further, the guide section may be configured so that the opening of the entrance and the exit of the cable are different. About the guiding part,
As a configuration in which the openings of the inlet and the outlet are different, for example, a guide portion configured in a trumpet shape, a guide portion having a plurality of rings having different diameters, a guide portion formed by the rollers, and a plurality of guide portions arranged so that the openings are different. The guide part which was set is considered. With such a guiding portion, a plurality of wheels can sandwich the cable at an optimal position for feeding the cable with a constant tension, and the cable feeding can be made smooth.

According to a seventh aspect of the present invention, in the cable feeder according to any one of the first to sixth aspects, the first drive unit is connected to the first drive unit.
A detection signal that detects a state of the load based on the drive signal output to the drive unit is output to the control calculation unit. For example, when an excessive current is flowing as a drive signal, the control calculation unit can determine that the cable is not being fed but is being driven even though the cable cannot be fed. Failure can be prevented.

According to a eighth aspect of the present invention, there is provided the cable feeder according to any one of the first to seventh aspects, wherein the feeder is configured to detect a change in a cable diameter. It is provided with a sensor part, and a control operation part which outputs a control signal which stops feeding of a cable to a 1st drive part based on a detection signal outputted from the sensor part.

Since the feeding of the cable is stopped by detecting that the diameter of the cable has changed, for example, the feeding of the cable is stopped when the diameter of the cable changes, and the feeding section is moved to move the feeding of the cable. By moving a plurality of wheels to positions suitable for the diameter, it is possible to perform optimal cable feeding. Also, lengthen the tow rope (for example, 3000m)
Therefore, when there is a knot or a connection fitting on the tow rope, the cable can be fed around the knot,
An excessive force is prevented from being applied to the moving unit, the gantry, the conversion driving unit, or the like when the knot passes through the wheel.

According to a ninth aspect of the present invention, there is provided the cable feeding device according to any one of the first to eighth aspects, wherein the feeding portion is configured to detect a change in a cable diameter. A sensor unit, a control operation unit that obtains a position of the moving unit based on a detection signal output from the sensor unit and outputs a control signal for moving the moving unit, and a control signal output from the control operation unit A second drive unit that outputs a drive signal for moving the moving unit based on the second drive unit, and a second drive unit that drives the moving unit based on a drive signal from the second drive device. .

[0025] With this configuration, it is possible to cope with cables of various diameters, and the wheels are automatically moved so as to sandwich the cable at an optimum position to feed the cable, so that the cable is not damaged and the cable is not damaged. Can be prevented from being caught on the wheels.

According to a tenth aspect of the present invention, in the cable feeder according to any one of the seventh to ninth aspects, the control operation unit is configured to perform a control based on an input detection signal. An output unit for outputting a state signal about the determined state to the outside is provided.

[0027] The output unit may be a transmission device for transmitting the state signal output by the control operation unit to the outside via a wired or wireless transmission path. The received status signal is received by a receiving device provided inside the controller operated by the worker, and the status signal is displayed in a form that the worker can grasp on a display unit or the like provided in the controller. The state may be confirmed. Also, workers near the cable feeder can check the output directly.
The output unit may be a display unit such as a character display. Further, the status signal may be transmitted to another cable feeder. In addition, in order to give priority to the worker's judgment when there is a worker, for example, when an operation by the worker is input from the controller, the control from the controller is given priority over the processing of the control operation unit. Alternatively, the status signal changed by the operation of the worker may be externally displayed.

The state signal includes an operation state of the first drive unit read from the first drive unit, a state signal relating to a diameter state of the cable read from the sensor unit of the feed unit, and the like. With the configuration for detecting the state signal in this manner, the operator can easily grasp the abnormal situation, and can easily recover from a failure that has occurred during cable feeding.

Further, if the controller operated by the worker receives the status signal transmitted from the cable feeder and transmits a control signal for dealing with the abnormal situation to another cable feeder, the abnormal situation can be prevented. It can be a cable feeder that handles it automatically. Further, the configuration may be such that the state signal transmitted from the cable feeder is received by another cable feeder, and the control operation unit automatically stops the operation.

The cable feeder according to claim 11 is the cable feeder according to any one of claims 1 to 9, wherein the tension for measuring the tension transmitted by the transmission unit is used. A monitoring device, and a movement prevention unit that prevents the tension monitoring device from moving due to the tension transmitted to the tension monitoring device, wherein the tension monitoring device prevents movement by the movement prevention unit. It is characterized by monitoring whether or not the measured tension value is within a predetermined range, and controlling to perform a preventive process for lowering the tension when the measured tension value exceeds a predetermined tension. . Using a tension monitoring device incorporated in the cable feeder, the accurate tension with the frictional resistance reduced as much as possible by the reduction unit can be measured, and preventive processing can be performed using the tension. As the preventive processing, for example, processing such as outputting a warning signal that warns the worker through hearing or vision, reducing the cable feeding speed, stopping the cable feeding, or reducing the cable tension can be considered. Is accurate, it is possible to perform highly accurate preventive processing.

According to a twelfth aspect of the present invention, there is provided the cable feeding apparatus according to the eleventh aspect,
The tension monitoring device transmits and receives information related to tension to and from a tension monitoring device of another cable feeder. In cooperation with the other cable feeders, each cable feeder performs the cable feed with the tension set to a value within a predetermined range, so that a desired cable feed can be realized. As described above, in the cable feeder according to the first to twelfth aspects, various measures for monitoring the tension are made, and accurate monitoring of the tension becomes possible.

A cable laying method according to a thirteenth aspect is characterized in that the cable is laid while monitoring the tension of the cable by the cable feeder according to any one of the first to twelfth aspects. And The cable can be fed so that the tension of the cable is within a predetermined range while monitoring the tension accurately.

In the cable laying method according to the fourteenth aspect, the cable feeder according to the eleventh or twelfth aspect transmits and receives information regarding tension with another cable feeder while mutually transmitting and receiving the information. The feeding device is characterized in that the cable is laid while controlling to feed the cable with a tension within a predetermined range. While monitoring the tension accurately, the cable can be fed while being kept within a predetermined range of the tension of the cable in cooperation with another cable feeding device.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cable feeder according to a first embodiment of the present invention will be described below. FIG. 1 is a front view of the cable feeder of the present embodiment, FIG.
3 is a right side view, FIG. 4 is a bottom view, and FIG.
Is a sectional view taken along the line AA, FIG. 6 is a bottom view when two wheels are also removed, FIG. 7 is an explanatory view for explaining a ratchet mechanism provided on the wheels, and FIG. FIGS. 9 and 9 are explanatory views for explaining a contact state between a wheel and a cable, FIGS. 10 and 11 are also diagrams showing a configuration of another embodiment of a guide unit, and FIG. 12 is a cable without a conversion drive unit. FIGS. 13 and 14 are explanatory views illustrating a feeder, and are explanatory views illustrating a cable feeder having different numbers of wheels. Hereinafter, the cable feeder of the present embodiment will be described with reference to FIGS. 1, 3 and 4 show a state in which a cable is mounted on the cable feeder. In FIG. 5, the messenger wire locking portion is not shown for convenience of illustration.

First, the configuration of the cable feeder will be described. A support shaft 3 to which wheels 2 are fixed is rotatably supported by a mount 1 via a bearing 4. A bevel gear 5 is attached to an end of the support shaft 3. In the present embodiment, the bevel gear 5 can be any one of a straight bevel gear, a helical bevel gear, and a spiral bevel gear.

The bevel gear 6 meshing with the bevel gear 5 is
It is fixed to the rotation shaft of the first drive unit 7 shown in FIGS. The first drive unit 7 is an AC (Alternative Current) servo motor, an induction motor, or the like. Further, the first drive unit 7 in which the motor and the speed reducer are integrated may be used. The first drive unit 7 is fixed to a mounting jig 8 mounted on the gantry 1. At the start of the work, the operator selects the first drive unit 7 that is most suitable for the work, such as torque and speed, and attaches and fixes the first drive unit 7 to the attachment jig 8.
The drive unit 7 is configured to be easily attached and detached.
The first drive unit 7 is connected to the control unit 9. The control unit 9 will be described later.

Another bevel gear 10 meshing with the bevel gear 5 is fixed to a shaft 11. Shaft 11
Is supported by the bearings 12 and 13 so as to be rotatable. A bevel gear 14 is loosely inserted along the shaft 11 so as to move. The bevel gear 14 meshes with the bevel gear 15. The bevel gear 15 is fixed to one end of a support shaft 16 as shown in FIG.

As shown in FIGS. 5 and 6, the support shaft 16 is rotatably supported by a moving portion 18 via a bearing 17.
The moving unit 18 is configured to be movable with respect to the gantry 1 in a direction (horizontal direction) indicated by an arrow a in FIG.
Specifically, the moving part 18 is provided with the grooves 19a, 19
Slide along b. Then, as shown in FIG.
Is driven by a feed screw 21 screwed into a nut portion 20 fixed to the nut portion 20. Such a nut part 20 and a feed screw 2
Let 1 be a feeder. In order to drive this feed unit, in the present embodiment, the handle 22 is fixed to the tip of the feed screw 21. The worker turns the handle 22 and
The feed unit is driven manually.

Each of the shaft 11 and the bevel gear 14 is provided with a key groove (not shown), and the key 23 fitted in the key groove transmits the rotating power from the shaft 11 to the bevel gear 14. A bevel gear transfer unit 24 is provided to move the bevel gear 14 along the shaft 11 and to maintain the mesh between the bevel gear 14 and the bevel gear 15 when the feed unit moves in the horizontal direction. . The bevel gear transfer unit 24 moves the bevel gear 1 according to the movement of the moving unit 18.
4 is slid horizontally along the shaft 11. The bevel gear 10, shaft 11, bearings 12, 1 described above
3. In this embodiment, the bevel gear 14 is a conversion drive unit.

In this embodiment, the two wheels 2 and 25 are driven by using one first drive unit 7 and one conversion drive unit. The reason is that the first drive unit 7 and the conversion drive unit are used. This is because the conversion drive unit immediately responds to the change in the number of rotations of the wheel 7 and makes the rotation speeds and torques of the two wheels 2 and 25 the same without requiring complicated synchronization control or the like.

A wheel 25 is mounted on the support shaft 16. The wheels 2 and 25 may be, for example, a perforated elastic roller having a cylindrical hole penetrating substantially parallel to the central axis, a normal elastic roller without holes, or the like. Alternatively, a plurality of types of wheels having different hardness may be prepared, and may be changed as needed. By making the wheels elastic, it is possible to avoid damaging the cable 26. Wheels 2 and 25 are supported by shafts 3 and 1
6, it is attached by a split pin (not shown) or a fastener 2j shown in FIG.

The ratchet mechanism 2 is provided inside the wheels 2 and 25 so as to cope with a case where excessive tension is generated.
c and 25c are provided. The ratchet mechanism 2c of the wheel 2 will be described using the wheel 2 and the ratchet mechanism 2c shown in FIG. 7, and the description of the ratchet mechanism 25c will be omitted since it has the same configuration. The pawl 2d attached to the support shaft 3 is in contact with the pawl 2f urged by a spring 2e. The pawl 2f is rotatably supported by a shaft 2g, and the shaft 2g is fixed to the contact transmitting portion 2h to transmit a rotational force. The contact transmitting portion 2h contacts the inner periphery of the wheel 2 rotatably supported on the support shaft 3 and transmits the rotational driving force. As for the rotational direction of the rotational driving force, a desired rotational direction can be set by switching the direction conversion unit 2i.

When the rotation speed of the wheel 2 due to the pulling of the cable is higher than the rotation speed transmitted from the support shaft 3, the driving force wheel 2 and the contact transmission unit 2h rotate integrally in the ratchet mechanism 2c. However, the rotation speed becomes faster than the rotation speed of the support shaft 3, the pawl wheel 2d and the pawl 2f separate, and the wheels 2 idle. In this case, the torque transmitted by the cable feeder is zero.

On the other hand, when the rotation speed of the wheel 2 due to the pulling of the cable is lower than the rotation speed transmitted from the support shaft 3, the ratchet wheel 2d and the pawl 2f come into contact with each other in the ratchet mechanism 2c, and the wheel 2 makes contact transmission. The portion 2h and the support shaft 3 rotate integrally, and a cable traction force is supplied by the wheels 2 and 25. In this case, the torque transmitted by the cable feeder takes a predetermined value according to the speed.

However, when the rotation speed of the wheel 2 due to the pulling of the cable is significantly lower or 0 than the rotation speed transmitted from the support shaft 3, the ratchet mechanism 2c reduces the rotation driving force transmitted from the ratchet 2d. The claw 2f moves outward, and the wheel 2 idles. In this case, the torque transmitted by the cable feeder is zero. As described above, the torque value within the predetermined range can be transmitted by the ratchet mechanism 2c, and it is possible to avoid applying an excessive tension to the cable by feeding the cable with the excessive torque.

When the ratchet mechanism 2c is used to feed a cable using a plurality of cable feeders, when one of the plurality of cables sends a cable at a high speed due to a failure or the like, another cable feeder is used. Although the cable feeder continues at a constant speed, this cable feeder avoids that the wheel is driven while the pawl is idle and exceeds the maximum tension of the cable for the above-mentioned reason. In addition, when one of the plurality of units stops the cable feeding due to a failure or sends at a low speed, the other cable feeding device continues to send the cable at a constant speed, but the wheels of the cable feeding device rotate at a normal speed. As the cable rotates idle following the movement of the cable, it is possible to avoid exceeding the maximum tension of the cable.

That is, even if one cable feeder has a different speed, this cable feeder does not apply a load to the cable. Also, the wheels 2, 25 in contact with the cables have different dynamic friction coefficients between the wheels 2, 25 of the respective cable feeders and the cables 26 due to usage frequency, aging and the like. In such a case, at the beginning of the cable feeding, a state in which the wheel of a certain cable feeding device is rotating but the wheel of another cable feeding device is not rotating may occur, Can be prevented from exceeding a predetermined tension.

As described above, the ratchet mechanism 2c is
When torque is applied only in one direction and a high torque equal to or more than a predetermined value is applied, the pawl wheel 2d and the pawl 2f
And the wheels 2 have a function of avoiding transmission of torque. The value of this torque can be set.
Such a setting mechanism is a well-known technique, for example, with a general torque wrench, and a description thereof will be omitted. Thus, the ratchet mechanism 2c functions to avoid a situation where the tension exceeds a predetermined value. In addition, the ratchet mechanism 2c can be installed, for example, in the vicinity of the bearing, in addition to the inside of the wheel.

The wheels 2, 25 are chamfered at their outer peripheral ends or have a curvature (R). If two elastic wheels sandwich the cable without being chamfered, the two wheels will deform and become almost drum-shaped, and the most protruding points on the sides of the two drum-shaped wheels may interfere. is there. In the wheels 2 and 25 of the present embodiment, the ends are chamfered to avoid the above-described interference, and the cable is smoothly fed.

A guide 27 for guiding a cable 26 is attached to the gantry 1. The guiding portion 27 includes two rollers 27a and 27b arranged in parallel in the horizontal direction and two rollers 27c and 27d arranged in parallel in the vertical direction.
And These rollers are rod-shaped rollers, and move from the cable end side (cable receiving side) to the cable start side (cable sending side), that is, in the direction of arrow b, as shown in FIGS. It is configured to rotate along the cable 26 when the corresponding cable 26 contacts.

Further, in the present embodiment, the guiding portion 27 is disposed before and after the wheels 2 and 25, and guides the cable 26 to move stably. In addition, in addition to the configuration arranged in front and rear as shown in the drawing, the guide portion 27 exerts a predetermined effect even if arranged only in front or only behind. The guiding unit 27 of another embodiment will be described later.

The first drive unit 7 of the cable feeder is connected to the control unit 9, but more specifically, to the first drive unit 28 as shown in FIG. First
A control operation unit 29 is connected to the drive device 28, and a transmission / reception device 30 is connected to the control operation unit 29. The transmission / reception device 30 is provided for transmitting / receiving data to / from the controller 31 via wireless, wired, or messenger wires.

An example of transmission among such transmission and reception will be described. The first drive device 28 detects an excessive current flowing in the first drive unit 7 due to an abnormal load in the cable feeding and an excessive load, and outputs a detection signal to the control calculation unit 29. The control operation unit 29 determines the state from the detection signal and outputs a state signal to the transmission / reception device 30. The transmission / reception device 30 outputs this status signal to an external device such as an external controller 31 or another cable feed device. In addition, a status signal indicating whether the rotation state is forward rotation or reverse rotation is output as another state signal.

A control operation unit (not shown) in the controller 31 analyzes the state signal transmitted to the controller 31, and
Since the status is displayed on a display unit (not shown) provided in the controller 31, the operator can check the status of the cable feed. This cable feeder can confirm the contents of the error when an error occurs.
The operator can easily determine the removal of a fault on the cable such as the removal of a foreign substance when the foreign substance is caught on the cable, the repair of the failure, the replacement, and the like. In addition, other cable feeders except the cable feeder that issued the status signal analyze the received status signal to determine whether to continue the cable feed. Since this cable feeder determines its own operation, it is possible to quickly avoid a failure.

As an example of reception in transmission / reception, the transmission / reception device 30 receives a control signal output from the controller 31 based on an operation of a worker,
9 is output. The control operation unit 29 outputs the control signal to the first
Output to the drive device 28, and the first drive device 28
The first drive unit 7 is driven based on this control signal. When there are a plurality of cable feeders, all the cable feeders can be operated collectively by one controller 31, and each cable feeder can be operated independently by one controller 31. You can also. The tension of the cable can be set by the controller 31, and the cable can be fed while maintaining this tension.

In the cable feeder of the present embodiment, the messenger wire locking portion 32 is provided so that the cable feeder can be locked to the messenger wire passed between the electric poles.
Is provided. In FIG. 3, messenger wire locking portions 32 have pulleys 32a, 32b, 3
2c is attached. The pulley 32c is configured to move in the vertical direction, and the messenger wire can be easily attached. Such a messenger wire engaging portion 32 facilitates movement along the messenger wire. In the present embodiment, the messenger wire locking portion 32 has a function as a reducing portion that reduces the frictional resistance generated when the device main body moves due to the reaction force. This will be described later.

Further, a hole 32d is provided in the messenger wire locking portion 32, and a tension monitoring rope can be tied. In the present embodiment, the hole 32d has a function as a transmission unit for transmitting a reaction force generated according to the pulling force of the cable to the outside. This will be described later.

Further, since the messenger wire engaging portions 32 are provided at two places, the messenger wire is stably engaged with the messenger wire. When transmission / reception of a control signal or the like is performed using the messenger wire as a transmission path, the messenger wire locking portion 32 made of a conductor is used for transmission / reception of the control signal.

Next, a description will be given of a cable feed using this embodiment. When the cable is fed, as shown in FIG. 4, the wheels 2 and 25 rotate in the directions of arrows c and d, and move from the end of the cable to the start of the cable, that is, the arrow b.
Is moved in the direction of. Here, the beginning of the cable is the end of the cable, and the end of the cable is
This is the end of the cable on the side that is stored in a drum or the like opposite to the end of the cable. Each roller of the guiding portion 27 rotates when it comes into contact with the slack or bent cable 26, thereby smoothing the movement of the cable 26.

In this specification, the movement in the vertical direction due to the weight of the cable or the like is referred to as slack, and the movement in the left / right direction due to the wind or the like is described as bending. In such a cable feeder, as the cable 26 sags,
As shown in FIG. 9A, even if the cable moves in the vertical direction, it is guided by two rollers 27a and 27b of the guiding unit 27 to move at two fixed positions, and the cable 26 is moved to the cable end side, that is, FIG. Since the cable 26a is pulled in the direction of the arrow e in (a), the cable 26a moves back and forth between the cable 26a shown by a solid line and the cable 26b shown by a dotted line.
Stable as in c.

Since the wheels 2 and 25 are provided sufficiently long in the vertical direction, the wheels 2 and 25 come into contact with one of the planar positions indicated by oblique lines in FIG. The cable contacts the wheel and continues feeding the cable. Movement of the cable 26 in the vertical direction due to slack or the like is absorbed, so that the cable feeding can be continued, and the speed of the cable feeding can be increased.

The cable feeder is provided with a cable 26
When the cable is bent and moved in the left-right direction as shown in FIG. 9B, the cable is sandwiched only at a predetermined position by the wheels 2 and 25, and can be moved at a constant interval by the guide unit 27. Be guided. That is, a bend is allowed within a predetermined range, and a bend is induced when the predetermined range is exceeded. Within the predetermined range, only the surfaces of the wheels 2 and 25 that are in contact with the diagonal lines are in contact and the others are not, so that bending is allowed, and the cable 26 is pulled in the terminal side, that is, in the direction of the arrow f in FIG. Cable 2 shown by a solid line
It moves back and forth between 6a and the cable 26b indicated by the dotted line, and is stabilized like the cable 26c.

Since the wheels 2 and 25 are circular, FIG.
(B) It comes into contact only with the surface indicated by the diagonal lines, and no improper force is applied to the cable 26 even if the cable moves in the left-right direction. The movement of the cable 26 in the left-right direction due to bending or the like is absorbed, and the cable feed can be continued.
The speed of cable feed can be increased.

Various modifications are possible in the cable feeder of the present invention. Hereinafter, this modification will be described using the first embodiment. For example, although the guide unit 27 is not shown, the rollers 27a and 27
b may apply an urging force to pinch the cable by a spring (not shown). As shown in FIG. 10A, a plurality of (two in FIG. 10A) guide portions 27 formed by rollers are arranged along a cable 26 as a guide portion 27. They may be arranged before and after. By arranging a plurality of the cables, the bending and slack of the cable 26 before and after the wheels 2 and 25 are further reduced, and the cable can be fed more smoothly to supply the cables to the wheels.

Further, the guiding portion 27 may be configured so that the opening of the cable is different from the opening of the cable so as to reduce the bending and slack of the cable 26. As a specific example in which the openings at the entrance and the exit of the cable are different, for example, FIG.
As shown in (b), the guiding portion 27 may be formed in a trumpet shape. Note that the opening can be selected from a substantially circular shape, a substantially elliptical shape, and the like. Further, the guiding portion 27 may be provided with a plurality of rings having different diameters along the cable. Although not shown, the opening can be selected from a substantially circular shape and a substantially elliptical shape.

As shown in FIG. 10 (c), a guide portion having the same structure as the guide portion 27 by the rollers and having a plurality of ring-shaped guide portions arranged so as to have different openings is arranged. It may be 27. Thus, the guiding unit 27
Can be appropriately selected. Even if the cable is bent or slackened, the cable supplied to the plurality of wheels is guided to a predetermined position by the guiding portion, so that the cable can be stably transferred. It should be noted that a knot between the tow rope and the cable or a connection fitting is appropriately designed so as to pass therethrough so as to avoid stopping the cable feeding.

Further, in order to avoid the occurrence of a groove due to the wheels 2 and 25 and the cable being continuously pinched at substantially the same location, the above-described guide portion may be moved in the vertical direction. For example, as shown in FIG.
It is also possible to provide a slider crank device 27e for raising and lowering the rollers 27a, 27b so as to contact the wheels 2, 25 evenly as a whole, thereby avoiding the generation of grooves.

In addition to the conversion drive unit, other than the conversion drive unit described in the first embodiment, a rotation drive element using a gear train such as a worm and a worm wheel, a rotation drive element using a chain or a belt, etc. Is also conceivable. Even such a conversion drive unit can be used as a conversion drive unit as long as it has a function of converting and driving a rotational driving force as described in the present embodiment.

The cable feeder shown in FIG.
This is an embodiment in which the conversion drive unit is removed from the first embodiment. The bevel gear 10, the shaft 11, the bearings 12 and 13, the fixing part holding and fixing the bearing, the bevel gear 14, the bevel gear 15, the key 23, and the bevel gear transfer part 24 are removed. In this embodiment, the wheels 25 are configured to rotate freely, and follow a cable 26 sent by the rotation of the wheels 2. However, this does not impair the function of cable feeding, and the present invention can be implemented even with a cable feeding device without a conversion drive unit.

In addition to the two wheels shown in the first embodiment, the number of wheels can be three as shown in FIG. 13 or four as shown in FIG. The number of wheels rotatably supported by the gantry 1 or the moving unit can be variously set, and it is also possible to appropriately select which wheel is driven by the first driving unit 7. FIG.
The conversion drive unit can be further removed from the embodiment shown in FIG. 3 or FIG.

Next, a description will be given of a cable feeder according to a second embodiment of the present invention. 15 is a front view of the cable feeder of the present embodiment, FIG. 16 is a right side view thereof, and FIG. 17 is a control system block diagram thereof, FIGS. 18 and 19.
FIG. 4 is an explanatory diagram illustrating detection of a cable diameter. Less than,
The cable feeder according to the present embodiment will be described with reference to FIGS. In the present embodiment, only differences from the first embodiment will be described, and the other portions will be the same as the first embodiment, and description thereof will be omitted.

In the cable feeder according to the first embodiment, the handle 22 is provided to rotate the feed screw. In the cable feeder according to the second embodiment, however, FIG.
As shown in FIG. 16, instead of the handle 22, the first gear 3
3, second gear 34, second drive unit 35, two sensor units 3
6a and 36b are provided. As shown in FIG. 17, the control unit 9 is provided with a second drive device 37 for driving the second drive unit 35 in addition to the control configuration described in the first embodiment. Is connected to the second drive device 37 and the two sensor units 36a and 36b.

Further, the feed portion includes a feed screw having a movable portion rotatably attached to one end thereof, and a nut portion fixed to a gantry and having the feed screw screwed therein. The moving unit may be configured to move the moving unit. Further, a rotation handle may be attached to the other end of the feed screw so that the moving unit can be moved by an operator.

The sensor sections 36a and 36b are connected to the cable 26
Is provided to measure the diameter of In particular,
As shown in FIG. 18A, the distance A and the distance B between the sensor units 36a and 36b and the cable 26 are detected, and the distance A is detected.
The diameter of the cable 26 is calculated by the control calculation unit 29 using the distance and the distance B. Specifically, the memory unit (not shown) of the control calculation unit 29 previously stores A1, B1 which are the distances of the towing rope 26a for sending out and the diameter D1 of the towing rope 26a as initial values, and stores the values of the towing rope 26a. Diameter and various cables 26 tied to this tow rope 26a
Is calculated by the following equation.

D = (A1-A) + (B1-B)

The sum of the diameter D1 of the tow rope 26a and the increase / decrease d can be used as the diameter of the cable 26. Further, the increase / decrease d is set as the moving distance of the moving unit 18, and a control signal is output to the second drive device 37 so as to move the moving unit 18 by the moving distance. Note that, as shown in FIG. 18B, the two sensor units 36a and 36b are used because the increase and decrease are the same at the distance A 'and the distance B' detected when the cable 26 is bent. Thus, the cable diameter can be reliably detected without being affected by the bending of the cable 26.

The two sensor sections 36a and 36b are
Although a non-contact type sensor using a laser beam, a sound wave or the like is used, various other sensors can be used. For example,
As shown in FIG. 19A, a contact type sensor using driven wheels 36c and 36d in contact with the tow rope 26a and the cable 26 can be used. These driven wheels 36c, 3
6d is configured to pinch and press the cable 26 from left and right or up and down (in the direction of arrows g and h from left and right in FIG. 19A) by a spring (not shown), and change the positions of the driven wheels 36c and 36d. To the two sensor units 36
a, 36b are configured to detect.

For example, when changing from a certain tow rope 26a to a cable 26b having a different diameter connected via a connection fitting, these driven wheels 36c and 36d are pushed apart to change their positions, and the two sensor portions 36a and 36b are changed. Calculates the distance to the cable 26 and can measure the diameter of the tow rope or cable. Note that the calculation method is the same as in the case of using the non-contact sensor, and the description is omitted. Note that one driven wheel 36c may be fixed so as not to move from a predetermined position, and only the other one driven wheel 36d may be moved. In this case, only one sensor on the side where the driven wheel moves is required, and the configuration is simplified.

Since the sensor unit using the driven wheel plays a role as the guiding unit 27, the sensor unit can be integrated with the guiding unit 27. When a plurality of guiding units are provided, one sensor unit is used.
Can also be used as the guiding section. Further, although not shown, a configuration may be employed in which the position of the driven wheel is controlled to be at a predetermined position by a driving unit such as a motor, and the position of the cable is controlled.

Even when the two sensor portions 36a and 36b do not have a function of measuring the diameter of the cable 26, the structure for discriminating between the cable 26 having a plurality of diameters and the traction rope 26a for sending out is provided. You can also.
This is not to measure the diameter of the cable, but to determine the types of the tow ropes and cables 36a, 36b
And In this case, the diameter of the tow rope or cable is
The diameter is registered in a memory unit (not shown) incorporated in the control calculation unit 29, and the diameter of the tow rope or the cable is read from the memory unit in accordance with the determination result. As a specific configuration of such a sensor unit, an identification unit 36e for identifying the cable 26 and the tow rope 26a is provided, and the sensor units 36a and 36b detect the identification unit 36e, so that the tow rope 26a or the cable 26a is detected. And the diameter information is read from the memory unit of the control operation unit.

The sensor sections 36a and 36b and the discriminating section 36e include a case where the sensor section is a magnetic sensor and the discriminating section is a magnetic body such as a magnet, or a case where the sensor section emits light and is reflected. It is conceivable that the identification unit may be a reflector in an optical sensor that detects the presence or absence of light. Then, the diameter information is read out from the memory unit of the control calculation unit by associating the number of the identification units 36e with the diameters of the tow rope 26a and the cable 26. For example, as shown in FIG. 19B, when there is one identification unit, the diameter information of the tow rope 26a is read, and when there are two identification units, the diameter information of the cable 26 is read. Thus, the tow rope 26a and the cable 26
The distance between the wheels 2 and 25 can be changed in accordance with the above.

The second drive device 37 outputs a drive signal to the second drive unit 35 based on the diameter information obtained in this way. The second drive unit 35 is, for example, a DC (Dire
ct Current) servo motor. A first gear 33 is fixed to a pivot shaft of the second drive unit 35. The second gear 34 meshing with the first gear 33 is fixed to the tip of the feed screw 21 by a support shaft. The second driving unit 35 moves the moving unit 18 to a predetermined position via the first gear 33, the second gear 34, and the feed screw 21, and moves the moving unit 18 to an optimal position for the two wheels 2, 25 to sandwich the cable. Outputs a drive signal until it moves.

Note that, as in the present embodiment, the sensor unit 36
When a and 36b are arranged in front, that is, at the starting end side of the cable 26, the sensor units 36a and 36b detect after the large-diameter cable is interposed and passed through the wheel at a separation distance for the tow rope. The feeding unit operates. For this reason,
The tip of the cable may be deformed. In this case, the deformed cable 26 may be cut.

Although not shown, the sensor sections 36a, 36a,
When the cable 36b is arranged rearward, that is, at the terminal side of the cable 26, the feed portion operates before the cable 26 passes through the wheel, so that the tip of the cable 26 is not deformed, or even if it is deformed, it is deformed. Can be reduced. In the embodiment of the feed unit, the rotation handle 22 has been described as being excluded. However, the rotation handle 22 is fixed to the tip of the feed screw 21 of the feed unit of the present embodiment, and the wheel 2 is automatically and manually operated. , 25 may be adjusted.

The diameter information of the tow ropes, cables and the like detected by the sensor units 36a and 36b is output as a state signal to the controller 31 and other cable feeders. In addition to this, the operator can display and confirm information such as presence / absence of overcurrent, forward / reverse operation, and which cable feeding device the tow rope is being fed to by a display unit (not shown) provided in the controller 31. These cable feeders can confirm the contents of the abnormality when an abnormality occurs. It is possible to determine the removal of a fault on a cable, the removal of a fault in a cable feeder, the repair of a fault, the replacement, and the like.

In some cases, the tow rope 26a or the cable 26 may bend extremely to the left or right to apply abnormal pressure to the wheel 2 or the wheel 25. Even in such a case, it may be determined to be normal as long as the diameter of the tow rope 26a or the cable 26 is detected as described above. Therefore, in order to further increase the reliability, a cable feeder that constantly measures the lateral pressure and deals with abnormalities may be used. For example, although not shown, the wheels 2 and 25 are pressed inward by a spring or the like on a line connecting the centers of the wheels 2 and 25 at the side portions of the wheels 2 and 25, and rotated by following the wheels 2 and 25. Two driven wheels and wheels 2,
It is also possible to provide two pressure sensors for detecting an increase in the lateral pressure of the wheels 25 through a change in the spring force of the driven wheel to detect the lateral pressure of the wheels 2 and 25. When the lateral pressure of the wheels 2 and 25 rises abnormally, preventive processing such as stopping the cable feed is performed.

Although not shown, the moving part 18 is further divided into two parts, the first moving part being movably mounted on the gantry 1 and having the feed screw 21 mounted thereon, and the first moving part. It is also possible to adopt a configuration in which a second moving unit which is further movably mounted on the top, and a pressure sensor (for example, a strain gauge type) is inserted so as to be sandwiched between the first moving unit and the second moving unit. . In this case, the first moving unit does not move in the lateral direction because the feed screw 21 is constrained to be at the predetermined position, but the second moving unit operates when an abnormal force is applied to the wheels 25. An abnormal force is transmitted through the support shaft 16 and the bearing 17 to move in the lateral direction.
Therefore, the pressure sensor sandwiched between the first moving unit and the second moving unit can detect the pressure. Wheels 2,25
If the lateral pressure of the cable rises abnormally, preventive measures such as stopping the cable feed are performed. It should be noted that such a configuration for measuring the lateral pressure can be variously considered in addition to the above, and is appropriately selected. Further, such measurement of the lateral pressure is not limited to the second embodiment, and may be performed by the cable feeder of the first embodiment.

As described above, in the cable feeder according to the second embodiment, the cable feed is automatically performed with a tension within a predetermined range in order to adjust the separation distance between the wheels according to the diameter of the tow rope or the cable. It is possible to do.

As described above, the cable feeder of the first and second embodiments avoids pulling the cable beyond a predetermined tension and feeds the cable with a tension within a predetermined range. A cable laying method using the cable feeders of the first and second embodiments will be described. FIGS. 20, 21, and 22 are explanatory views showing examples of a cable laying method using a cable feeder. Note that components already described in the cable feeder are denoted by the same reference numerals.

FIG. 20A shows the cable feeder 160.
FIG. 4 is an explanatory view for explaining a cable laying method of laying a cable by locking the cable to one messenger wire 100. FIG.
As shown in (a), the messenger wire 100 is stretched by a plurality of columns 110. The cable hanger 120 is fixed to the messenger wire 100. The cable 130 is connected to the tow rope 150 via the connection fitting 140. Cable feeder 160
Sends the cable 130 in the direction of arrow i while passing through the cable hanger 120. Further, the tow rope 150 is also towed by another cable feeder (not shown).

At this time, the reaction force of the pulling force of the cable is indicated by an arrow j.
To move the cable feeder 160. However, the movement of the cable feeder is prevented by the fixed rope 170 which is an example of the movement prevention unit.
A tension monitoring device 180 is provided between the cable feeder 160 and the fixed rope 170 to monitor the tension. Since the tension monitoring device 180 does not need to pass and move the fixed rope 170 inside, a simple configuration can be achieved. Specifically, a simple device such as a spring may be used in addition to the tension monitoring device generally used conventionally. Even with such a simple structure, information on tension can be obtained.

The movement preventing portion may be a mechanism for fixing the messenger wire 100 to the messenger wire 100 via the tension monitoring device 180 in addition to the fixing rope 170 for fixing to the column. Various configurations are conceivable for the movement prevention unit, but it is only necessary to have a function of preventing movement. Further, a rope connecting the tension monitoring device 180 and the hole 32d may be omitted, and the tension monitoring device 180 may be integrated with the cable feeding device. Such a configuration will be described later. Further, when it is necessary to feed the cable in the reverse direction for some reason, one end of another fixed rope (not shown) is connected to the other hole 32d through another tension monitoring device (not shown), and the messenger is not shown. The other end of the fixed rope is connected to the wire 100, and the tension may be monitored using a tension monitoring device, so that the tension can be measured regardless of the direction of the cable feed speed.

The information on the tension monitored by the tension monitoring device 180 is transmitted to the monitoring device 200 via the communication cable 190. The monitor device 200 includes, for example, a display device that displays information, and a transmission device that transmits information to another cable feed device. Also, the monitor device 20
A value of 0 monitors whether or not the tension is within a predetermined range. If the tension exceeds the predetermined range, a preventive process is performed. The preventive process is a process for preventing the tension from exceeding a predetermined tension when feeding the cable. The preventive processing by the monitor device 200 includes, for example, outputting a warning signal that warns the worker through hearing or vision. An operator can operate the controller 31 to take measures such as stopping the cable feeding.

Further, a signal relating to the tension value may be output from the monitor device 200 to perform the preventive processing by the cable feeder. For example, an analog signal
An analog-to-digital converter (hereinafter, analog to digital converter) (not shown) converts the voltage signal that increases in proportion to the
And is called A / D converter. ) To convert the digital signal to a digital signal. The digital signal is input to the control calculation unit 29. When the control calculation unit 29 determines that the voltage is high, that is, the tension value is large, the cable feed speed is reduced. Preventive processing, such as stopping the cable feed or controlling the cable feeder to reduce the cable tension. In this case, highly accurate preventive processing can be performed based on an accurate tension value. Note that since such a configuration forms a feedback loop, it is possible to perform feedback control other than the preventive processing to perform control for maintaining a constant tension value. Whether or not to control the tension value by feedback control is appropriately selected.

When the cable sags and descends in the direction of arrow k in FIG. 20 (b), the direction in which the cable is sent changes, and the force is decomposed in the horizontal direction and the vertical direction. It becomes tension, and the tension decreases as compared with the actual tension. Therefore, if the tension is corrected and output, more accurate tension can be measured. FIG. 20 shows that frictional force is applied to the messenger wire locking portion of the cable feeder.
(B) works in the direction of arrow l, but the pulley reduces the frictional resistance. Accordingly, the tension measured by the tension monitoring device 180 can be measured more accurately because the frictional resistance is reduced.

In many cases, a plurality of (two in FIG. 21) cable feeders are used as the cable laying method. In this case, the measured tension is transmitted and received between the plurality of cable feeders, the tension monitoring device or the monitor device, and control is performed so as to maintain a preset tension between the plurality of cable feeders. As a specific example, when a cable with a maximum tension of 250 kgf is towed, one cable feeder may have a cable tension of 120 kgf.
kgf, and another cable feeder performs torque control so that the cable tension becomes 80 kgf (hereinafter, such control is referred to as torque-
It is called torque control. ), The cable is fed with a total tension of 200 kgf. Further, speed-speed control or torque-speed control may be performed for the same purpose. In any case, the plurality of cable feeders cooperate and control so that the sum of the tensions of the plurality of cable feeders falls within a predetermined range of tension.

In this way, the cable is sent without exceeding a predetermined tension, and the cable is smoothly fed. If you have a ratchet mechanism,
If one of the cable feed speeds is high due to failure,
The occurrence of a situation exceeding the predetermined tension is prevented by the operation of the ratchet mechanism. Further, even when there is no ratchet mechanism, an abnormal state is detected and the cable feeding is stopped. In this way, a situation in which the tension exceeds a predetermined value can be avoided.

Although the cable feeder and the cable laying method for engaging with the messenger wires stretched by the columns have been described, the present invention can also be used for laying underground cables such as manholes, common grooves, and tunnels. FIG.
As shown in FIG. 2, the cable feeder 160 is inserted into the upright hole 310 from the manhole 300 and is locked by the messenger wire 100 stretched in the upright hole 310.
The cable 130 is sent to the introduction hole 320 using the cable feeder 160. At this time, a cable feeder,
Transmission / reception of tension is performed between the tension monitoring device or the monitoring device, and control is performed so that a predetermined tension is maintained and the maximum tension is not exceeded.

Such a cable laying method differs depending on the number of cable feeders. As shown in FIG.
In the cable laying method using two cable feeders,
The cable feeder 160 controls so as to feed the cable at a constant tension within a predetermined range. In this case, one controller 31 is operated by a worker. An operator visually checks the tension on a display unit (not shown) of the monitor device 200 and operates the controller 31 so as to maintain a constant tension. If there is a mode for maintaining a constant tension by automatic control, the mode may be selected and operated to reduce the burden on the operator.

The case where a failure has occurred in the cable feed will be described. An obstacle to such a cable laying method is that when the cable 130 is caught by a bracket or the like and cannot be sent, if there is no ratchet mechanism, excessive torque is applied and an excessive current is applied to the first drive unit 7 of the cable feeder. A flowing obstacle is conceivable. In this case, when a current exceeding a preset current value flows to the first drive unit 7, the control calculation unit 29 is programmed to forcibly stop the operation automatically. Further, the tension monitoring device may also mechanically measure and monitor the tension. Further, when the operator checks the cable of the operator and the status signal displayed on the display unit (not shown) of the controller 31, the operator turns off the power supply (not shown) provided on the controller 31 to lay the cable. Can also be stopped. Of course, if there is a ratchet mechanism, it will run idle if it exceeds a certain torque, so it will not be a load on other cable feeders, and cable feed will be possible if the other cable feeder is within the predetermined tension value range It is.

The worker performs adjustment, repair, replacement, etc. of the cable feeder, removes an obstacle such as removing a cable hooked on the cable hanger, and resumes operation. In order to avoid stopping the cable feeding due to an erroneous operation by an operator, the operation from the controller 31 has a protection function that operates when two predetermined operation buttons are pressed one by one in two steps, and the reliability is improved. Have improved. Such a function is called an interlock function.

A cable laying method using more than two cable feeders will be described. Even when the number of cables exceeds two, it is the same as the cable laying method using two cable feeders. Referring to FIG. 21, the three or more cable feeders 160 control the tension of the cable to be constant within a predetermined range. In three or more cable feeders, the cable feeder 16
0, the tension monitoring device 180, the monitoring device 200, and the controller 31 each transmit and receive the tension, monitor the tension of the other cable feeding devices, and perform the cable feeding in conjunction with each other. The predetermined tension input and set using the controller 31 is maintained.

When a tension difference occurs in a certain cable feeder, it is possible to avoid exceeding the maximum tension if there is a ratchet mechanism, but if there is no ratchet mechanism, the tension immediately increases. However, since an increase in the tension can be detected by the tension monitoring device 180, control for immediately decreasing the tension is performed. This control may be performed by a program so as to be performed automatically, or an operator may directly operate the controller 31. Further, when the lateral pressure increases, the separation distance between the wheels may be automatically controlled to obtain the optimum tension. The cable laying performed by locking the cable feeder to the messenger wire has been described above.

The cable feeder to be locked to the messenger wire and the cable laying method have been described so far. However, it is assumed that the cable feeder is movably mounted on a carriage having a flat surface or rails. Can also. A description will be given of such a cable feeder according to the third embodiment of the present invention. FIG. 23 is a front view of the cable feeder of the present embodiment, and FIG. 24 is a right side view of the same. Hereinafter, the cable feeder of the present embodiment will be described with reference to FIGS. In the present embodiment, only differences from the first embodiment will be described, and the other portions will be the same as the first embodiment, and description thereof will be omitted.

The cable feeder of the third embodiment is the same as the first embodiment except that the cable feeder has a reduction section having a rotating body 38 instead of the messenger wire locking section 32. The cable laying method using such a cable feeder is performed by placing the cable feeder 160 so as to be movable on the flat surface or the rail of the table 330 as shown in FIG. Even if the reaction force due to the pulling of the cable 130 is applied in the direction of the arrow l, the frictional resistance force applied in the direction of the arrow j is reduced by the rotating body 38. Can be.

The cable feeder provided with the reduction unit having the pulley for moving on the messenger wire has been described so far, but a special reduction unit using a column other than engaging on the messenger wire. You can also. A description will be given of such a cable feeder according to the fourth embodiment of the present invention. FIG. 26 is an explanatory diagram illustrating the cable feeder of the present embodiment. Hereinafter, the cable feeder of the present embodiment will be described with reference to FIG. In the present embodiment, only differences from the first embodiment will be described, and the other portions will be the same as the first embodiment, and description thereof will be omitted.

In the cable feeder of the fourth embodiment, as shown in FIGS. 26 (a) and 26 (b), the cable feeder is attached to the support post instead of being locked to the messenger wire lock portion 32. A fixing portion 39 fixed to the
A rotating shaft 40 erected on the fixed portion 39, a rotating arm 41 rotatably supported by the rotating shaft 40, a pin 42 erected on the rotating arm 41, A cable feeder 160 fixed to the rotating arm 41. The rotation arm 41 is provided so as to smoothly rotate about the rotation shaft 40 as an axis, and functions as a reduction unit. Further, the pin 42 functions as a transmission unit that transmits the tension generated by the cable feed to the tension monitoring device. Further, instead of the messenger wire locking portion 32, the cable feeding device is fixed to the rotating arm 41 by a member. The other parts are the same as the first embodiment.

A cable laying method using such a cable feeder will be described. When the cable is sent in the direction of arrow m in FIG. 26B, the cable feeder transmits a reaction force in the direction of arrow n in FIG. Then, the rotating arm 41 transmits the reaction force in the direction of the arrow O in FIG. The tension is transmitted to the tension monitoring device 180 via the fixed rope 170. As shown in FIG. 20 (b), the correct tension is not transmitted because the length and angle are different, as is clear from the relationship of the rotational moment. For this reason, it is necessary to make a correction, but a correction value can be obtained using the ratio of the lengths L1 and L2 and the angle θ. In this manner, the tension monitoring device 180 can perform accurate measurement by regarding the reaction force as tension. In this embodiment, even if the cable is fed in the direction opposite to the arrow m in FIG. 26B, the tension can be monitored by another tension monitoring device 180.

In the fourth embodiment, it has been described that the messenger wire locking portion 32 is removed and fixed to the rotating arm 41 by the member for fixing the cable feeder. Alternatively, a short-distance messenger wire may be stretched on the rotating arm 41 to install the cable feeder of the first embodiment. Thus, various forms can be taken.

In the first to third embodiments, the transmitting portion is a hole, and the hole and the tension monitoring device are connected via a rope, and the tension monitoring device and the support are connected to a fixed rope. The tension was monitored by tying through. However, it is possible to implement the present invention by mechanically creating a member connecting the hole and the tension monitoring device instead of the rope and integrally configuring the transmission unit and the tension monitoring device. Installation can be facilitated. At this time, the tension monitoring device and the control calculation unit are connected to monitor whether the tension is within a predetermined range. If the tension exceeds a predetermined range, the control calculation unit performs a preventive process. You may do so. Precautionary measures include outputting a warning signal to alert the operator through hearing or vision, controlling the cable feed speed to be slow, stopping the cable feed, or controlling the cable to reduce the tension. As for the processing, since the tension is accurate, a highly accurate preventive processing can be performed.

The cable feeder according to the present invention is provided with a slack detecting section for detecting a slack of a cable.
The slack of the cable may be removed, and the cable can be fed as more accurate tension. Further, the reduction unit is not limited to the rotating body, and a special mechanism such as a slide bearing may be used. Any device that reduces the frictional resistance can be used as a reduction unit.

[0112]

According to the cable feeder and the cable laying method of the present invention described above, the tension can be accurately and easily monitored without being affected by the sizes of the connection fittings, cables, and tow ropes. it can.

[Brief description of the drawings]

FIG. 1 is a front view of a cable feeder according to a first embodiment of the present invention.

FIG. 2 is a plan view of the cable feeder according to the first embodiment of the present invention.

FIG. 3 is a right side view of the cable feeder according to the first embodiment of the present invention.

FIG. 4 is a bottom view of the cable feeder according to the first embodiment of the present invention.

FIG. 5 is a view illustrating a cable feeder according to a first embodiment of the present invention;
It is -A sectional drawing.

FIG. 6 shows a second embodiment of the cable feeder according to the first embodiment of the present invention.
It is a bottom view at the time of removing two wheels.

FIG. 7 is an explanatory diagram illustrating a ratchet mechanism provided on wheels of the cable feeder according to the first embodiment of the present invention.

FIG. 8 is a control system block diagram of the cable feeder according to the first embodiment of the present invention.

FIG. 9 is an explanatory diagram illustrating a contact state between a wheel and a cable of the cable feeder according to the first embodiment of the present invention.

FIG. 10 is a configuration diagram of another example of the guide section of the cable feeder according to the first embodiment of the present invention.

FIG. 11 is a configuration diagram of another example of the guide section of the cable feeder according to the first embodiment of the present invention.

FIG. 12 is an explanatory diagram illustrating a cable feeder according to an embodiment in which a conversion drive unit is removed from the cable feeder according to the first embodiment of the present invention.

FIG. 13 is an explanatory diagram illustrating a cable feeder according to the first embodiment of the present invention, which has different numbers of wheels.

FIG. 14 is an explanatory diagram illustrating a cable feeder according to the first embodiment of the present invention, the cable feeder having different numbers of wheels.

FIG. 15 is a front view of a cable feeder according to a second embodiment of the present invention.

FIG. 16 is a right side view of the cable feeder according to the second embodiment of the present invention.

FIG. 17 is a control system block diagram of a cable feeder according to a second embodiment of the present invention.

FIG. 18 is an explanatory diagram illustrating detection of a cable diameter.

FIG. 19 is an explanatory diagram illustrating detection of a cable diameter.

FIG. 20 is an explanatory diagram illustrating an example of a cable laying method using the cable feeders according to the first and second embodiments of the present invention.

FIG. 21 is an explanatory diagram illustrating an example of a cable laying method using the cable feeder according to the first and second embodiments of the present invention.

FIG. 22 is an explanatory diagram showing an example of a cable laying method using the cable feeder according to the first and second embodiments of the present invention.

FIG. 23 is a front view of a cable feeder according to a third embodiment of the present invention.

FIG. 24 is a right side view of the cable feeder according to the third embodiment of the present invention.

FIG. 25 is an explanatory diagram showing an example of a cable laying method using the cable feeder according to the third embodiment of the present invention.

FIG. 26 is an explanatory diagram illustrating a cable feeder according to a fourth embodiment of the present invention.

FIG. 27 is an explanatory diagram illustrating a cable laying method according to the related art.

[Explanation of symbols]

Reference Signs List 1 base 2, 25 wheels 2a, 2b, 25a, 25b wheels 2c ratchet mechanism 2d ratchet 2e spring 2f pawl 2g shaft 2h contact transmission unit 2i direction conversion unit 2j clasp 3,16 support shaft 4,12,13,17 Bearings 5, 6, 10, 14, 15 Bevel gear 7 First drive unit 8 Mounting jig 9 Control unit 11 Shaft 18 Moving unit 19a, 19b Groove unit 20 Nut unit 21 Feed screw 22 Handle 23 Key 24 Bevel gear transfer unit 26 Cable 26a Tow rope 27 Guiding part 27a, 27b, 27c, 27d Roller 27e Slider crank device 28 First drive device 29 Control calculation unit 30 Transmitting and receiving device 31 Controller 32 Messenger wire locking unit 32a, 32b, 32c Pulley 32d Hole 33 1 gear 34 2nd gear 35 2nd drive part 36a, 36b Sensor unit 36c, 36d Follower wheel 36e Identification unit 37 Second drive device 38 Rotating body 39 Fixed unit 40 Rotating shaft 41 Rotating arm 42 Pin 100 Messenger wire 110 Support 120 Cable hanger 130 Cable 140 Connection fitting 150 Tow rope 160 Cable feeder 170 Fixed rope 180 Tension monitoring device 190 Communication cable 200 Monitoring device 300 Manhole 310 Vertical hole 320 Inlet hole 330

Continuation of the front page (72) Inventor Taketoshi Hatanaka 1-2-2, Oshima, Koto-ku, Tokyo Inside the Shoden Co., Ltd. (72) Inventor Shunichi Yanagawa 1-2-23, Oshima, Koto-ku, Tokyo Shodenai, Inc.

Claims (14)

[Claims] 1. A gantry, a moving unit that moves on the gantry, a feed unit that moves the moving unit, and a plurality of at least one of which is rotatably supported by the gantry and the moving unit. A support shaft, a plurality of wheels supported by the plurality of support shafts, and a first drive unit that supplies a driving force for rotationally driving at least one support shaft of the gantry or the moving unit. A first drive device that outputs a drive signal to the first drive unit; an input unit to which a control signal to be output to the first drive device is input; and a control signal that is input to the input unit and reads out the control signal. 1
A control operation unit that outputs a control signal to the drive device, a reduction unit that reduces a frictional resistance force at a location that contacts the outside to determine a posture, and a reduction unit that generates a reaction force generated when the cable is pulled. A transmission unit for transmitting a force obtained by subtracting the reduced frictional resistance force to the outside as tension. 2. The cable feeder according to claim 1, wherein the reduction unit suspends the cable feeder from an overhead wire,
A cable feeder comprising a rotating body for moving on an overhead wire. 3. The cable feeding device according to claim 1, wherein the reduction unit includes a rotating body for moving the cable feeding device on a plane or a rail. 4. The cable feeder according to claim 1, wherein a moving cable exceeds a predetermined cable feed speed or is lower than a predetermined cable feed speed. A cable feeder comprising a ratchet mechanism for interrupting transmission of rotational driving force between the wheel and the support shaft. 5. The cable feeder according to claim 1, wherein at least one support shaft pivotally supported by one of the gantry and the moving unit. A rotational driving force that rotates in the reverse direction to the rotational direction of the rotational driving force supplied by the driving unit,
A cable feeder, comprising: a conversion drive unit for supplying a support shaft rotatably supported on the other side of the gantry or the moving unit. 6. The cable feeder according to claim 1, further comprising a guiding portion for guiding a supplied cable to a position sandwiched by the plurality of wheels. Cable feeder. 7. The cable feeder according to claim 1, wherein the first drive unit changes a state of a load based on a drive signal output to the first drive unit. A cable feeder for outputting a detected detection signal to the control operation unit. 8. The cable feeder according to claim 1, wherein the feeder is a sensor for detecting a change in cable diameter, and is output from the sensor. And a control operation unit that outputs a control signal to stop feeding of the cable based on the detection signal to the first drive unit. 9. The cable feeder according to claim 1, wherein the feeder is a sensor for detecting a change in cable diameter, and is output from the sensor. A control operation unit for obtaining a position of the moving unit based on a detection signal and outputting a control signal for moving the moving unit, and a drive signal for moving the moving unit based on a control signal output from the control operation unit And a second drive unit that drives the moving unit based on a drive signal from the second drive device. 10. The cable feeder according to any one of claims 7 to 9, wherein the control operation unit outputs a state signal about a state determined based on an input detection signal to the outside. A cable feeder, comprising: 11. The cable feeder according to claim 1, wherein a tension monitor for measuring a tension transmitted by the transmission unit, and a tension monitor transmitted to the tension monitor. A movement prevention unit that prevents the tension monitoring device from moving due to the tension that is applied, and a control calculation unit that performs a control calculation based on the tension value output by the tension monitoring device. In the prevented state, it is monitored whether the tension value measured by the tension monitoring device is within a predetermined range, and when the tension value exceeds a predetermined tension, a preventive process for reducing the tension is performed. A cable feeder, characterized in that it is controlled to perform. 12. The cable feeding device according to claim 11, wherein the tension monitoring device transmits and receives information on tension to and from a tension monitoring device of another cable feeding device. 13. A cable laying method, wherein the cable is laid while monitoring the tension of the cable by the cable feeder according to any one of claims 1 to 12. 14. A cable feeder according to claim 11, wherein each cable feeder transmits and receives information on tension with another cable feeder, and each cable feeder has a tension within a predetermined range. A cable laying method characterized by laying a cable while controlling the cable to be sent by a cable.