JP2001352627A - Hanging wheel with sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hanging wheel with a sensor which can make an overhead wire movable without restraint, while the overhead wire is installed normally and can stop the installation of the overhead wire, only when an abnormality such as the abnormal inclination and abnormal speed, etc., of the overhead wire is detected, so as to improve the safety of the overhead wire installation work. SOLUTION: This hanging wheel has a sensor, which turns a braking rotary cam 8 and makes an elastic rubber unit 6 and the braking rotary cam 8 hold an overhead wire between them to stop the movement of the overhead wire, when it is detected by an encoder that the moving distance, moving speed or moving acceleration of the overhead wire exceeds a predetermined value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal wheel used for laying an overhead line such as a rope, a messenger wire or a cable (hereinafter, these are collectively simply referred to as an overhead line). The present invention relates to a metal wheel with a sensor for detecting an abnormal state of an overhead wire and stopping the movement of the overhead wire.

[0002]

2. Description of the Related Art In a work of laying a cable on a utility pole, in addition to the cable, a drawstring and a messenger wire are extended over a long distance. In order to move these overhead wires imaginarily, a gold wheel is conventionally used. There are various types of gold cars depending on the application. No. 2 gold cars for suspending overhead lines on normal overhead lines, and overhead lines are also suspended, especially at overhead points, tow points, curve points, and inter-column junctions. 4 to lower
There is a gold car.

[0003] In addition to these No. 2 and No. 4 gold wheels, anti-back wheel wheels are known. The anti-back wheel has an anti-back function for preventing movement in the direction opposite to the cable extending direction (anti-back). The anti-back function prevents an abnormal situation in which the overhead line runs backward. The conventional technology of this anti-back car is
For example, Japanese Unexamined Patent Publication No. Hei 4-351406, Heikai 5-2
No. 5913.

The present inventor has studied these prior arts and invented an anti-back metal wheel which solves the problems of the prior art, and has filed Japanese Patent Application No. 11-348379 (the title of the invention "anti-back metal wheel"). ").
Not only anti-back function, but also miniaturization and weight reduction
It is an anti-back gold car that realizes both mechanism simplification,
The work efficiency of the laying work of the overhead wire has also been improved compared to the past.

[0005] However, it has been confirmed that a new abnormal situation cannot be prevented by using only an anti-back car having an anti-back function. Hereinafter, such an abnormal situation will be schematically described. FIG. 37 is an explanatory diagram for explaining an outline of an overhead wire laying operation using an anti-back wheel. In the overhead wire laying work using the anti-back car, Fig. 3
As shown in FIG. 7 (a), the overhead wire can be moved in the overhead wire feed forward direction, and cannot be moved in the overhead wire feed reverse direction, and once the overhead wire is extended, the overhead wire will return. Nothing happens.

However, there is a possibility that an abnormal situation such as hanging of the overhead line may occur in the operation of laying the overhead line using the anti-back metal wheel. For example, if a droop occurs between two anti-back wheels as shown in FIG. 37 (b), one of the anti-back wheels (left side in the figure) does not reverse the overhead wire, but the other anti-back wheel. In the vehicle (right side in the figure), the overhead wire is sent in the forward direction of the overhead wire feed, so the drooping increases. As described above, there is a problem that the messenger wire or the overhead wire may hang down even if the second wheel, the fourth wheel and the anti-back wheel are used.

[0007] Depending on the place where the overhead line hangs down, there is a risk of causing an accident. For example, the overhead wire laying work is often performed on the lower side of a high traffic road or a city road. If the overhead line hangs down on the road, the car will catch on the overhead line, and in the worst case, it will lead to a major accident such as the collapse of the utility pole, the fall of the worker, and the injury of the driver of the vehicle. It was correct. For this reason, the development of a gold wheel with a brake function of stopping an extension line by detecting an abnormality of the overhead line during the extension operation is being studied.

For example, the anti-back wheel disclosed in Japanese Patent Application Laid-Open No. 4-351406 has a structure in which a cable is vertically sandwiched by a plurality of rollers, and the cable is pressed from the up and down directions to load the cable in the cable extending direction and in the opposite direction. A force is applied to prevent the cable from easily moving in the direction opposite to the extending direction of the cable due to the load force, so that the cable has a braking function in addition to the anti-back function, thereby coping with the hanging of the cable.

However, as the number of anti-back wheels increases, the load applied to the cable accumulates and increases.
Since the cable extension extends over a long distance, it is necessary to arrange anti-back wheels at a plurality of locations (particularly locations near roads where it is desired to reliably prevent falling). There is also a risk that the extension of the cable may be hindered by an excessive load force and the cable may not be extended. In addition, the fact that the load force is such that the cable can move usually does not mean that the cable is completely stopped, and that it cannot completely prevent the cable from sagging.

Furthermore, the anti-back wheel of the invention of Japanese Utility Model Laid-Open No. 5-25913 and Japanese Patent Application No. 11-348379 filed by the present applicant have a braking function because the anti-back function is preferentially enhanced. However, it was not possible to prevent the hanging of the overhead wire.

The inventor of the present invention has also invented a wheel to solve these problems, and has filed a patent application as Japanese Patent Application No. 11-353940 (the title of the invention "wheel with sensor"). The brake function is realized, and the safety of the laying work of the overhead line is further improved than before by using it together with the anti-back car.

[0012]

Further, as the inventors proceeded with experiments and studies on the wheel with a sensor filed previously, the inventors of the present invention, with the sensor with respect to the sag occurring on the winch side of the wheel with a sensor with respect to the extending direction, have a sensor. Rather than detecting sagging that occurs on the winch side of the wheel, detecting sagging that occurs on the drum side and detecting abnormal situations in which the overhead wire moves in an abnormal state based on the travel distance, speed, and acceleration of the overhead wire It was found that abnormal situations could be detected more quickly. These detection methods can be used with a currently known detector such as a tacho generator other than the encoder. Utilizing these facts, it was concluded that it was possible to develop a gold wheel that could quickly detect the occurrence of an overhead line abnormality and more quickly prevent sagging, and that development had been made. There has also been a demand for further reducing the mounting work by integrating the anti-back wheel and the sensor wheel.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and makes it possible to move the overhead wire without restraining the overhead wire at the time of normal overhead wire drawing, and to make the overhead wire have an abnormal inclination, an abnormal overhead wire, and the like. An object of the present invention is to provide a wheeled car with a sensor that improves the safety of an overhead wire laying operation by stopping an overhead wire extended in the overhead wire extension direction only when an abnormality is detected.

[0014]

According to a first aspect of the present invention, there is provided a wheel with a sensor, comprising: at least a pair of rollers that rotate following an overhead wire to be extended; A receiving member disposed between the pair of rollers in a state having a gap apart from the overhead wire, a frame member rotatably supported at one end, and the other end moving following the overhead wire, A sensor unit that is attached to the frame member and outputs a detection value according to the movement of the overhead wire, and is rotatably disposed at a position facing the receiving member across the overhead wire, and has a different radius from the rotation axis. A rotary cam for braking formed to have a cam curve, a cam drive unit for rotating the rotary cam for brake, a sensor unit and a cam drive unit. A drive control unit that controls the cam drive unit A wheel with a sensor that moves the sensor together with the frame member in accordance with the wire diameter of the overhead wire so that the sensor is always detected at an optimal position, and the drive control unit is controlled based on the output from the sensor. When it is determined that the extension of the overhead wire has become abnormal, the cam drive unit rotates the brake rotary cam to follow the overhead wire, and rotates the brake rotary cam so as to increase the radius of the overhead wire. The passage is narrowed, and the rotating cam for brake presses the overhead wire down, causing the overhead wire to enter the gap between the receiving members, and sandwiching the overhead wire between the receiving member and the rotating cam for braking to stop the movement of the overhead wire. .

According to a second aspect of the present invention, there is provided a wheel with a sensor according to the first aspect, wherein the rotating cam for brake is rotatably supported by the frame member and is rotatable with respect to the frame member. Urged to rise,
The frame member moves according to the wire diameter of the overhead wire, and the rotating cam for brake attached to the frame member moves to avoid contact with the overhead wire.

According to a third aspect of the present invention, there is provided a wheel with a sensor according to the first or second aspect, wherein the cam drive unit comprises: a moving unit for moving a rotary cam for braking; A restraining portion that restrains the movement of the portion, and a solenoid that releases the restraint of the moving portion by the restraining portion,
When the drive control unit determines that the extension of the overhead line has become abnormal based on the output from the sensor unit, the drive control unit drives the solenoid to release the restraint by the restraining unit, and moves the moving unit, and brakes. By rotating the rotary cam, the brake rotary cam stops the movement of the overhead wire.

According to a fourth aspect of the present invention, there is provided a wheel with a sensor according to any one of the first to third aspects, wherein the wheel is turned to a position facing the receiving member with the overhead wire interposed therebetween. A wheel with a sensor including an anti-back rotary cam that is movably disposed, and has a cam curve having a different radius from the rotation axis. When the overhead wire moves in the extension direction, it rotates to reduce the radius of the rotating cam to widen the path of the overhead wire, and when the overhead wire moves in the opposite direction to the extension direction of the overhead wire, the rotation of the anti-back rotary cam Rotate to increase the radius to narrow the path of the overhead wire, and the anti-back rotating cam presses the overhead wire downward to let the overhead wire enter the gap between the receiving members, and the overhead wire is formed by the receiving member and the anti-back rotating cam. Of the overhead wire And a cam stop moving, and wherein the stopping the overhead line to be determined and has brought about an abnormality regardless of the extension line direction using a rotary cam and rotating cam anti-back brake.

According to a fifth aspect of the present invention, in the wheel with a sensor according to any one of the first to fourth aspects, the rotary cam for brake is provided with a hole and / or a rotary cam.
Alternatively, a groove is provided.

According to a sixth aspect of the present invention, there is provided a wheel with a sensor according to the fourth aspect, wherein the anti-back rotary cam includes a hole and / or a groove.

According to a seventh aspect of the present invention, there is provided a wheel with a sensor according to any one of the first to sixth aspects, wherein the contact member has a contact surface of the overhead wire with a projection. Alternatively, it is characterized by being provided in a rough surface by a groove.

According to the present invention, there is provided a wheelbarrow with a sensor according to any one of the first to seventh aspects, wherein the arithmetic processing of the drive control unit is manually set freely. It is possible to set the speed at which the drive control unit determines that an abnormality has occurred in the extension of the overhead line based on the output from the sensor unit.

According to a ninth aspect of the present invention, there is provided a sensor-equipped wheel including at least a pair of rollers that rotate following an extended wire, and a pair of rollers that are separated from the extended wire and have a gap. And a receiving member disposed between the rollers, and rotatably disposed at a position facing the receiving member across the overhead wire,
And, a rotating cam for brake formed so as to have a cam curve having a different radius from the rotating shaft, a sub-roller rotatably supported by the rotating cam for brake, and rotated following the overhead wire, A sensor unit for moving the rotary cam for braking according to the inclination of the overhead wire,
At the time of normal extension of the overhead wire, the overhead wire is driven by the auxiliary roller of the brake rotary cam so that the brake rotary cam and the overhead wire are in a non-contact state, and when the wire diameter of the overhead wire is large, the sensor unit rotates the brake rotary cam. The brake rotating cam is moved up to avoid contact of the brake rotary cam with the overhead wire, and when the overhead wire is inclined, the brake rotary cam is lowered by the sensor unit to be driven by the overhead wire. To increase the radius of the overhead wire, narrowing the path of the overhead wire, the rotating cam for brake presses the overhead wire downward, and the overhead wire enters the gap between the receiving members, and the overhead wire is formed by the receiving member and the rotating cam for brake. The movement of the overhead wire is stopped by being sandwiched.

According to the tenth aspect of the present invention, at least one pair of rollers that rotate in accordance with an extended overhead wire and a pair of rollers that are separated from the extended overhead wire and have a gap. Receiving member disposed between the rollers, a wedge cam for brake disposed at a position facing the receiving member across the overhead wire, a cam pressing roller for moving the wedge cam for brake downward, and a brake A wagon with a sensor, comprising: a guiding groove for guiding a cam connecting pin protruding from a wedge cam; and a sensor unit for moving a wedge cam for braking in accordance with inclination and / or movement of the overhead wire, During normal wire drawing, the wedge cam for brake and the cam pressing roller are not in contact with each other, and the cam connecting pin is movable vertically along the guide groove, depending on the wire diameter of the overhead wire. The wedge cam for brake is vertically movable, and the wedge cam for brake is moved by the sensor unit to a position in contact with the cam pressing roller when the overhead wire is inclined and / or moved beyond a predetermined reference. The wedge cam for brake is driven by the cam holding roller to move the wedge cam for brake downward,
The wedge cam for a brake presses the overhead wire down, causing the overhead wire to enter the gap between the receiving members, and sandwiches the overhead wire between the receiving member and the brake wedge cam to stop the movement of the overhead wire.

Further, in the wheel with a sensor according to the eleventh aspect, at least a pair of rollers that rotate following an extended wire and a pair of rollers that are separated from the extended wire and have a gap. Receiving member disposed between the rollers, a guide groove provided obliquely so as to face at least downward with respect to the extension direction of the overhead wire, a brake follower guided by the guide groove, and a brake follower A follower restraint for restraining the child,
With a sensor comprising: a sensor unit for detecting a state of a catenary wire; and a drive control unit electrically connected to the sensor unit and the follower restraining unit, for calculating the output of the sensor unit and controlling the follower restraint unit. If the drive control unit determines that the output of the sensor unit has caused an abnormality in the extension of the overhead wire based on the output from the sensor unit, the follower restraining unit is driven to release the restraint of the brake follower and guide the groove. Guides the brake follower downward, causes the brake follower to follow the overhead wire and the guide groove, and moves the brake follower downward, and the brake follower presses the overhead wire downward to receive the receiving member. The overhead wire into the gap between
The movement of the overhead wire is stopped by sandwiching the overhead wire between the receiving member and the brake follower.

In the wheel with a sensor according to the twelfth aspect, in the wheel with a sensor according to the eleventh aspect, the guide groove is substantially V-shaped, substantially U-shaped, substantially human-shaped, or substantially square ( A wheel with a sensor comprising a groove formed in a lambda) shape and having a determining portion for determining that the brake follower is guided only in one direction guiding groove, wherein the guide groove is extended by the guiding groove determined by the determining portion. It is determined whether the overhead wire that moves in the forward direction or the reverse direction is stopped.When stopping the overhead wire that moves in the forward direction, the brake follower is inclined so that it will face downward with respect to the extension direction of the overhead wire. When stopping the overhead wire that is guided in the guide groove provided in the direction and moves in the opposite direction, it is guided by the guide groove that is provided diagonally so that the brake follower faces downward with respect to the direction opposite to the extension direction of the overhead wire. And any guide groove brake Even in the follower, the brake follower narrows the path of the overhead wire, the brake follower presses the overhead wire downward, causing the overhead wire to enter the gap between the receiving members, and sandwiching the overhead wire between the receiving member and the brake follower. It is characterized in that the movement of the overhead wire is stopped.

According to a thirteenth aspect of the present invention, there is provided a wheel with a sensor according to the twelfth aspect, wherein the determining unit is manually operated, and the overhead wire extending abnormally in the forward direction or the reverse in the reverse direction. It is set so that only one of the overhead lines to be sent is stopped.

According to a fourteenth aspect of the present invention, in the wheeled car with the sensor according to any one of the first to thirteenth aspects, the arithmetic processing of the drive control unit is manually set freely. It is possible to set the speed at which the drive control unit determines that an abnormality has occurred in the extension of the overhead line based on the output from the sensor unit.

According to a fifteenth aspect of the present invention, there is provided a wheelbarrow with a sensor according to the twelfth aspect, wherein the sensor for outputting a detection value corresponding to the movement of the overhead wire and the determining part for driving the determining part And a control operation unit that controls the determination unit based on the detection value of the sensor unit, and determines that the drive control unit has caused an abnormality in the extension of the overhead wire based on an output from the sensor unit. In this case, the deciding unit driving unit is driven to operate the deciding unit to detect and stop both the overhead wire that extends abnormally in the forward direction and the overhead wire that runs backward in the reverse direction. The sensor unit that outputs the detection value is configured to detect forward rotation and reverse rotation of the determination unit driving unit, and the control calculation unit operates when the speed becomes higher than a certain speed. As a result, when the forward rotation and the reverse rotation exceed a certain speed, the operation is performed to stop the overhead wire.

According to a sixteenth aspect of the present invention, there is provided a wheel with a sensor according to any one of the first to fifteenth aspects, wherein the wheel with a sensor is mounted on a support and used. It is characterized by having a device that can perform inspection and restoration before.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a wheel with a sensor according to the present invention will be described. First, a wheel with a sensor according to the first embodiment of the present invention will be described. FIG. 1 is a front view of a wheel with a sensor of the present embodiment, FIG.
FIG. 3 is also a plan view, FIG. 4 is an explanatory view for explaining overhead wire attachment, FIGS. 5, 6, and 7 are explanatory views for explaining the inside view along the line AA, and FIG. FIG. 9 is an explanatory diagram for explaining a braking operation, FIG. 10 is an electric block diagram for the same, FIG. 11 is a structural diagram of an improved solenoid, and FIGS. 12 and 13 are sensors of the present invention. It is explanatory drawing explaining the attachment form of a wheel. Hereinafter, the wheel with a sensor according to the present embodiment will be described with reference to FIGS. Some parts such as overlapping parts are omitted for clarity of the drawings.

As is clear from FIGS. 2 to 4, the wheel with a sensor 100 of this embodiment has a configuration in which two wheels with a sensor are mounted in parallel, so that two overhead lines can be extended. Has been made. As shown in FIGS. 1 to 4, this wheel with sensor 100 includes an outer frame 1, a roller frame 2 for a small-diameter overhead wire, and a roller for a large-diameter overhead wire, which are attached to the outer frame 1 so as to be openable and closable. A frame 3, a pair of rollers 4 and 5 rotatably mounted on the roller frames 2 and 3, and an elastic rubber portion which is a specific example of the receiving member of the present invention and is mounted on the roller frames 2 and 3, respectively. 6, 7 are provided.

Further, the wheel with a sensor 100 according to the present embodiment 100
Is a rotary cam for braking 8, which stops a moving overhead wire,
9 and the gold wheel arm mounting portion 1 fixed to the outer frame 1
0, guide rollers 11 and 12 rotatably supported by roller frames 2 and 3, frame members 13 and 14 rotatably attached to outer frame 1, and a sensor unit of the present invention. This is a specific example, and the frame members 13 and 1
Encoders 15 and 16 mounted on the frame member 4 and frame members 13 and 14 which are specific examples of the cam drive unit of the present invention.
, And solenoids 17 and 18 attached to the motor.

As shown in FIGS. 2 to 4, the outer frame 1 is formed by combining a total of four steel plates 1a, a central cylindrical support 1b, and both outer cylindrical supports 1c. Specifically, as shown in FIG. 4, bolts 1d are inserted through holes provided in the four steel plates 1a and the cylindrical supports 1b and 1c, and these four steel plates 1a and the cylindrical supports 1 are inserted.
b and 1c from outside so as to be integrated with the bolt 1d.
It is formed by being fixed with the nuts 1f. The fixing through the outer frame 1 by such bolts and nuts is performed at the upper three places as shown in FIG.

Note that cylindrical supports are not used at locations where the rotary cams 8 and 9 and the frame members 13 and 14 interfere with each other when rotating. For this reason, the rotary cam 8 for the brake,
9 does not interfere with the cylindrical support. When attaching this sensor-equipped wheel to a utility pole, a temporary scaffold attachment method (not shown) is used. The mounting is often used together with the anti-back wheel and the wheel with sensor and the wheel with the sensor are often used with dedicated mounting brackets for mounting on one telephone pole. The outer frame 1 is configured as described above.

The roller frames 2 and 3 are pivotally supported by the shaft supporting portions 2a and 3a as shown in FIGS. 2 and 3, and are mounted to be rotatable with respect to the outer frame 1 as shown in FIG. ing. The roller frames 2, 3 are fixed to the outer steel plate 1a by screwing portions 2b, 3b. As shown in FIGS. 2 and 3, a pair of rollers 4 and 5 are rotatably supported by the roller frames 2 and 3, respectively. The rollers 4 and 5 have a substantially thread-wound shape, and are configured to guide the overhead lines on the rollers 4 and 5 to the center. As shown in FIG. 2 and FIG.
Indicates that the roller width is reduced for small-diameter overhead wires, and that the roller 5 is increased for large-diameter overhead wires. These roller widths are appropriately designed and designed to be rollers of any length according to the application.
Selected.

As shown in FIGS. 2 and 3, guide rollers 11 and 12 are rotatably supported at the ends of the roller frames 2 and 3, respectively. These guide rollers 11 and 12
Has a function of guiding the overhead wire to return to the rollers 4 and 5 when the overhead wire is likely to come off from the rollers 4 and 5. 2 and 3, the guide rollers 11,
The guiding function may be enhanced by increasing the thickness of the wire 12 so as to always contact the overhead wire.

As shown in FIGS. 2, 3, and 5, frame members 13 and 14 are attached to the outer frame 1 so as to be rotatable. The frame members 13 and 14 of the present embodiment have a shape in which half of the bottom surface is removed from a substantially U-shaped member. This frame member 13, 1
The support shaft 4 also serves as the cylindrical support 1c. As is clear from FIG. 5, brake rotating cams 8, 9 are further mounted on the frame members 13, 14 so as to be rotatable. Specifically, the rotary cams 8 and 9 for brakes are also rotatably inserted into the cylindrical pillars 1c which are the support shafts of the frame members 13 and 14, so that they are pivotally supported. The support shafts of the frame members 13 and 14 and the support shafts of the rotary cams 8 and 9 for brake may be provided separately. Such a configuration is appropriately designed and selected (described as a second embodiment).

The brake rotary cams 8, 9 are urged by a torsion coil spring (not shown) so that the brake rotary cams 8, 9 move upward and abut against the frame members 13, 14. As a result, the rotary cam 8 for the brake
9 are usually frame members 13 and 14 as shown in FIG.
It is stationary with the ascent up.

Encoders 15, 16 which are specific examples of the sensor section of the present invention are attached to the frame members 13, 14. As shown in FIGS. 2 and 3, the encoders 15, 1
6, a rotary element 15a that contacts and moves with the moving overhead wire,
16a is attached. Rotator 1 on moving overhead wire
5a and 16a are driven to rotate, and the encoders 15 and 16 are rotated.
Will output a pulse. This pulse output is output to a drive control unit described later. Although the encoders 15 and 16 are provided on the rollers 4 and 5 in the present embodiment, they may be brought into contact with portions other than the rollers 4 and 5. The pulse output and the like are not limited to the encoder, and the output is transmitted to the drive control unit by a currently known detector such as a tacho generator.

As shown in FIGS. 2, 3 and 5, solenoids 17 and 18, which are a specific example of the cam drive unit of the present invention, are attached to the frame members 13 and 14. As shown in FIG. 6, the solenoids 17, 18 move the brake rotary cams 8, 9 downward against the urging force of a not-shown torsion coil spring. The drive of the solenoids 17 and 18 is controlled by a drive control unit described later.

In the wheel with a sensor of this embodiment, even when the wire diameter of the overhead wire to be extended changes, the frame members 13 and 14 rise upward as shown in FIG.
In this case, the brake rotary cams 8, 9 and the rotators 15a, 16a of the encoders 15, 16 both rise, so that even if the wire diameter of the overhead wire becomes large, the overhead wires are formed on the brake rotary cams 8, 9. A situation in which the rollers 4 and 5 and the rotators 15a and 16a come into contact with each other and stop with the overhead wire in between does not occur. Further, since the rotators 15a and 16a always contact the overhead wire at an appropriate position, the detection accuracy can be maintained at a constant quality. Further, overhead wires having different wire diameters, such as a pull cord, a messenger wire, or a communication cable, can be continuously extended at one time.

Subsequently, attachment of the overhead wire will be described.
As shown in FIG. 4, when the roller frames 2 and 3 are opened, the screwing portions 2b and 3b, which are screwed into the screw portions at the tips of the spindles of the rollers 4 and 5, are rotated and moved to the tips. The roller frames 2 and 3, the rollers 4 and 5, the elastic rubber portions 6 and 7, and the guide rollers 11 and 12 move downward integrally, and the overhead wire can be attached to the sensor-equipped wheel & pinion 100.

When the overhead wire is mounted, the overhead wire is arranged on the rollers 4 and 5, as shown in FIG. Further, the elastic rubber portions 6 and 7 which are one specific example of the receiving member of the present invention disposed between the pair of rollers 4 and 5 are slightly lower than the rollers 4 and 5, , 7 and the overhead wire have a gap. This gap will be described later. The brake rotating cams 8 and 9 are also formed of an elastic material such as rubber, and have a large frictional resistance against the overhead wire, and are driven when they come into contact with a moving cable. The rotating cams 8, 9 for the brakes are elastic rubbers 6,
7 is arranged at a position facing the same.

The rotating cams 8 and 9 for braking are
As shown in FIG. 8, the configuration is such that the radii at various points from the rotation axis are different. The cam curves of the brake rotary cams 8 and 9 are curves in which the radius increases as a moves from a to b to c. When the brake rotary cam rotates as indicated by an arrow d in FIG. The traveling path of the overhead wire is widened, and the traveling path of the overhead wire is narrowed by rotating as shown by an arrow e in FIG. 9B. The behavior of the rotating cam for brake will be described later.

As shown in FIG. 1, a wheel arm mounting portion 10 is mounted on the upper side of the outer frame 1. The gold wheel arm attachment portion 10 is provided for suspending the gold wheel with sensor 100 from a utility pole. Fig. 2
And a J-shaped member 10 formed in a J-shape and having a threaded portion at the other end, as shown in FIG.
b and a butterfly nut 10c for fixing the J-shaped member 10b
And an eyebolt 10d for movably attaching these.

A round hole is formed by tightening the butterfly bolt 10c and fixing the J-shaped member 10b to the mounting portion main body 10a. As shown in FIGS. 12 and 13, the metal wheel 100 with the sensor is mounted on a utility pole by inserting the metal wheel arm of the mounting bracket through the round hole of the metal wheel arm mounting portion 10. Wheel with sensor 10
0 has such a configuration.

Next, the behavior of the rotary cams 8 and 9 during the braking operation will be schematically described. The brake cams 8 and 9 are urged in the direction of arrow d in FIG. 9A by a torsion coil spring (not shown), and are kept out of contact with the overhead wire during normal times. When the overhead line changes from a state in which the overhead line has no slack (hereinafter referred to as a tight line state) to a state in which the overhead line hangs in front of the sensor-equipped wheel, the traveling speed of the overhead line increases, and the overhead line is extended.
The rotators 15a and 16a of the encoders 15 and 16 rotate following an overhead line moving at an abnormal speed and rotate.
5 and 16 output pulses.

As shown in the electric system block diagram of FIG. 10, the pulse output is output to the drive control units 20 and 21. The drive control units 20 and 21 calculate the input pulses. For example, when the number of pulses in a predetermined period increases and the number of pulses becomes larger than a predetermined threshold value, it is detected that the moving amount has increased or the extension speed has increased. When the number of pulses sequentially increases each time the predetermined period elapses, it is detected that the extension speed has increased or the acceleration of the extension has increased. In any case, it is determined that an abnormality has occurred in the extension of the overhead line. In such a case, the drive control unit 2
0 and 21 output drive signals to the solenoids 17 and 18. Note that the sensor unit is not limited to the encoder, but may be a drive meter, a speedometer, an accelerometer using light, magnetism, or the like, or a currently known sensor or the like. The drive control units 20 and 21 may be integrally attached to the wheelbarrow 100 with the sensor, or may be arranged below the utility pole or overhead wire using an extension cable. These configurations are designed and
Selected.

The solenoids 17, 18 move the brake rotary cams 8, 9 downward. In this case, the rotating cams 8 and 9 for braking start descending from the state of FIG.
As shown in FIG. 9B, the brake is applied by contacting the overhead wire. Due to the weight of the rotating cams 8, 9 and the frictional resistance between the overhead wires and the rotating cams 8, 9, the rotating cams 8, 9 are provided.
Lowers the overhead wire while continuing to rotate in the direction of arrow e in FIG. 9B, and finally firmly sandwiches and fixes the overhead wire between the elastic rubber members 6, 7 and the rotating cams 8, 9. . In this way, when an abnormality of the extension line is detected based on excessive movement, speed, and acceleration of the overhead line, a brake is applied to the overhead line to prevent the overhead line from hanging down. The braking operation is performed in this manner.

As another example of the cam drive unit of the present invention, an improved solenoid as shown in FIG. 11 can be used. As shown in FIG. 11A, in addition to the solenoids 17 and 18, the improved solenoid includes push rods 17a and 18a and push rod urging portions 17b and 18.
b, constraint parts 17c, 18c, constraint part urging parts 17d, 1
8d and covers 17e and 18e.

Usually, the protruding bars 17a, 18a are housed in the covers 17e, 18e in a state of being urged by the protruding bar urging portions 17b, 18b. Protruding rod 1
7a and 18a are restrained by the restraining portions 17c and 18c so as not to move. These restraining parts 17c, 18c
Is connected to solenoids 17 and 18. Restraint part 17
c and 18c are urged by the urging portions 17d and 18d for the restraint portion, and usually, as shown in FIG.
a, 18a are in a position to restrict the movement.

To move the rotary cams 8 and 9 for braking, the solenoids 17 and 18 are moved in the solenoid operation direction indicated by an arrow f in FIG. The restraint by the restraining portions 17c and 18c is released, and the pushing rod urging portions 17b and 18b are released.
The pushing forces 17a and 18a are pushed out in the pushing rod operating direction indicated by the arrow g in FIG. With the improved solenoids 17 and 18, the required electric energy can be reduced as compared with the case where the brake rotary cams 8 and 9 are pushed directly by the solenoids 17 and 18.

Next, the manner of mounting the wheel with a sensor will be schematically described. Normally, as shown in FIGS.
The wheel with sensor 100 is used in combination with the anti-back wheel 101 described as a related art. A mounting pole 103, which is a substantially U-shaped prism, is mounted on one electric pole 102 using a mounting bracket 104 or a chain (not shown),
A pair of wheels 103a, 103b of the mounting bracket 103
The wheel with sensor 100 and the anti-back wheel 1
01 are attached so that the round holes of the respective gold wheel arm attachment portions 10 pass through.

A rod having the same size as the gold wheels 103a and 103b and the size of the round hole of the gold wheel arm mounting portion 10 is stretched, and the butterfly nut 10c is loosened to loosen the J-shaped member 1.
If the J-shaped member 10b is screwed and attached after opening and mounting the 0b, it is fixed and does not move. In this case, the wheel with a sensor 100 is positioned rearward with respect to the extension direction of the overhead wire.
However, an anti-back wheel wheel 101 is disposed in front. If the overhead wire is moved backward by the wheel with a sensor 100 and the anti-back wheel 101 mounted in this way, the anti-back wheel 101 stops moving backward, and is determined in advance by the wheel with a sensor 100. It can be stopped when the moving amount / moving speed / moving acceleration exceeds. As a result, it is possible to stop all the extension of the abnormal overhead line.

Next, a description will be given of a wheel with a sensor according to a second embodiment of the present invention. FIG. 39 is a sectional view of the configuration of the wheel with a sensor according to the present embodiment. A wheel 200 with a sensor shown in FIG. 39 has frame members 13 and 14 to which encoders 15 and 16 are attached arranged outside, and the solenoid 1
Reference numerals 7 and 18 are fixed outside the outer frame 1. As shown in the side sectional view, the solenoids 17 and 18 directly fix the rotary cams 8 and 9 for braking.

Next, a description will be given of a wheel with a sensor according to a third embodiment of the present invention. FIG. 14 is a sectional view of the configuration of the wheel with a sensor of the present embodiment. The wheel with sensor 150 of the present embodiment is the same as the wheel with sensor 100 of the first embodiment.
In addition, anti-back rotary cams 30 and 31 are added. In FIG. 14, anti-back rotating cams 30 and 31 are newly added in addition to the configuration of the sensor-equipped wheel of the first embodiment.

The anti-back rotary cams 30 and 31 are rotatably provided by a cylindrical support 1b separately provided on the outer frame 1. When the overhead wire moves in the direction opposite to the extension direction, the anti-back rotary cams 30 and 31 follow the overhead wire. The overhead wire is inserted into the gap between the elastic rubber portions 6 and 7 to stop the movement of the overhead wire. With this configuration, if the overhead wire moves backward as described above, the backward movement is stopped by the anti-back rotating cams 30 and 31, and the overhead wire is moved by a predetermined amount. When the moving speed / movement acceleration is exceeded, the brake can be stopped by the rotating cams 8 and 9, and all the abnormal overhead lines can be stopped by one wheel.

Next, a description is given of a wheel with a sensor according to a fourth embodiment of the present invention. FIG. 15 is a sectional view of the configuration of the wheel with a sensor according to the present embodiment. The wheel with a sensor 200 'of the present embodiment is a modification of the wheel with a sensor of the second embodiment. A wheel with a sensor 200 'shown in FIG.
In FIG. 1, frame members 13 and 14 to which encoders 15 and 16 are attached are arranged outside, and solenoids 17 and 18 are fixed outside the outer frame 1. As shown in the side sectional view of FIG. 39, the solenoids 17 and 18 directly fix the rotating cams 8 and 9 for braking. Furthermore, it has anti-back and anti-run capability, and can use straight lines and curves.

As shown in FIG. 15, a plurality of rollers 32, 33 are used so as to be used at a curve point, a payout point and the like.
And guide rollers 34 and 35 formed of a pair of rollers for guiding the wire with the overhead wire interposed therebetween, but may be removed as in the second embodiment. These are appropriately attached according to the installation location. Even with this configuration, if the overhead wire moves rearward, the anti-back rotary cams 30, 31
, The rearward movement can be stopped, and when the overhead line exceeds a predetermined movement amount, movement speed, and movement acceleration, the brake rotation cams 8 and 9 can stop the movement.

Next, a description is given of a wheel with sensor 250 according to a fifth embodiment of the present invention. 16 is a front view of the wheel with a sensor of the present embodiment, FIG. 17 is a left side view thereof, FIG. 18 is a plan view thereof, FIG. 19 is an explanatory view for explaining cable attachment, FIG. 20, FIG. 21 and FIG. Is also BB
It is explanatory drawing explaining the inside view by a line cross section. Hereinafter, FIG.
The wheel with a sensor according to the present embodiment will be described with reference to FIGS. In addition, illustration is partially omitted for clarity of the drawing. Further, the same reference numerals are given to the common components of the first embodiment.

As is apparent from FIGS. 17 and 18, the wheel with a sensor 250 of this embodiment has a configuration in which two wheels with a sensor are mounted in parallel, so that two overhead lines can be extended. Has been made. This wheel with sensor 250
As shown in FIGS. 16 to 19, the outer frame 1
A roller frame 2 for a small-diameter overhead wire and a roller frame 3 for a large-diameter overhead wire that are openably and closably mounted on the outer frame 1, and a pair of rollers 4 and 5 rotatably mounted on the roller frames 2 and 3. An elastic rubber portion 6, 7 attached to each of the roller frames 2, 3, which is a specific example of the receiving member of the present invention, and a brake rotating cam 8, which is rotatably supported by the outer frame 1, is provided. 9, a wheel arm mounting portion 10 fixed to the outer frame 1, guide rollers 11, 12 rotatably supported by the roller frames 2, 3, and fixed to the outer frame 1. Sensor part 4
0, 41.

The outer frame 1 has sensors 40, 41
Has been fixed. As shown in FIGS. 16 to 18, the sensor units 40 and 41 include a pair of support frames 40 a and 41 a fixed to the outer frame 1 by screws, and columns 40 b and 41 b provided between the support frames 40 a and 41 a.
A link member 40c, 41c, which is a substantially A-shaped flat plate rotatably supported by the columns 40b, 41b, a plurality of columns 40d, 41d passed over the pair of link members 40c, 41c, respectively, and a link. A driven roller 40 rotatably attached to the members 40c, 41c via a support shaft
e, 41e.

As shown in FIG. 20, the rotary cams 8 and 9 for the brakes are connected to the link members 40c and 41c with respect to the cam support shaft 4.
It is pivotally supported via 2a and 43a. This cam support shaft 42
a and 43a are guide grooves 42 provided in the outer frame 1.
The moving direction is restricted by b and 43b. As described above, the link members 40c and 41c and the brake rotating cams 8 and 9 are linked, and the driven rollers 40e and 4c are linked.
When 1e moves up and down following the overhead wire, it is transmitted to the rotary cams 8 and 9 for braking via the link members 40c and 41c. These brake rotating cams 8, 9 are urged upward by springs 42c, 43c. The springs 42c and 43c are connected to the link follower 42.
d, 43d. Link driven members 42d, 43
d is rotatably supported by a shaft, and the link members 40c, 4c
1c. The auxiliary rollers 42e and 43e are rotatably supported by the brake rotary cams 8 and 9, respectively. The wheel with sensor 250 has such a configuration.

Next, the behavior of the rotating cams 8, 9 due to the inclination of the overhead wire will be described briefly. When the normal overhead wire is extended, as shown in FIG. 20, the auxiliary rollers 42e and 43e of the brake rotating cams 8 and 9 are moved relative to the overhead wire.
, So that the overhead wire is moved smoothly and the brake rotary cams 8 and 9 are prevented from contacting the overhead wire.

In the case where the wire diameter of the overhead wire is increased as shown in FIG. 21, the arrow h of the link members 40c, 41c is used.
In the direction, the rotation of the link followers 42d, 43d in the direction of arrow i, the pulling of the brake rotary cams 8, 9 in the direction of arrow j by the springs 42c, 43c, and the raising of the rotary cams 8, 9 in the direction of arrow k. In conjunction with this, the rotary cams 8 and 9 for brakes rise and pass through the overhead wire having a large wire diameter. In the case of L <L1 in the figure, the cam operates at the connection point, and the line is stopped.

In the case where the overhead wire is inclined as shown in FIG. 22, the link members 40c, 41c descend in the direction of arrow 1, the link followers 42d, 43d rotate in the direction of arrow m, the brake rotating cam 8, The brake rotary cams 8, 9 stop the overhead wire in conjunction with the descent of the arrow 9 in the direction of the arrow n and the movement of the brake rotary cams 8, 9 following the overhead wire. With this configuration, the rotating cams 8 for brakes,
9 can only be stopped if it exceeds a predetermined slope.

Next, a description will be given of a wheel with a sensor according to a sixth embodiment of the present invention. FIG. 23, FIG. 24, and FIG. 25 are cross-sectional configuration diagrams of the wheel with a sensor according to the present embodiment. The wheel with a sensor 300 of the present embodiment is a modification of the wheel with a sensor 250 of the fifth embodiment.

The link member 40 of the sensor units 40 and 41
The first links 50a, 51a are rotatably attached to one ends of the first and second links c, 41c, and the other ends of the first links 50a, 51a are rotatably supported by link support shafts 50b, 51b.
Links 50c and 51c are rotatably attached. A long hole is provided at the other end of the second link 50c, 51c, and the cam support shaft 50d, 51d is freely supported in the long hole. Further, the cam support shafts 50d and 51d have third links 50e and 5d, respectively.
1e is freely supported, and brake rotating cams 8, 9 are connected to the third links 50e, 51e. The auxiliary rollers 42e and 43e are rotatably supported by the rotary cams 8 and 9 for braking. The wheel with a sensor 300 has such a configuration.

Next, the behavior of the brake rotary cams 8 and 9 due to the inclination of the overhead wire will be schematically described. When the normal overhead wire is extended, as shown in FIG. 23, the auxiliary rollers 42e and 43e of the brake rotating cams 8 and 9 are moved relative to the overhead wire.
, So that the overhead wire is smoothly moved and the brake rotary cams 8 and 9 are prevented from contacting the overhead wire.

In the case where the wire diameter of the overhead wire is increased as shown in FIG. 24, the arrow o of the link members 40c and 41c is used.
, The link support shafts 50b, 51b move in the direction of arrow p, and the third links 50e, 51e rotate the brake cams 8, 9 in the direction of arrow q.
The rotating cams 8 and 9 for the brakes rise and pass through the overhead wire having a large wire diameter. In the case of L <L1 in the figure, the cam operates at the connection point, and the line is stopped.

In the case where the overhead wire is inclined as shown in FIG. 25, the link members 40c and 41c are lowered in the direction of arrow r, the link support shafts 50b and 51b are moved in the direction of arrow s, and the third links 50e and 51e are used. Rotating cam for brake 8,
In conjunction with the rotation of arrow 9 in the direction of arrow t, brake rotary cams 8, 9 lower the overhead wire in the direction of arrow u while following the overhead wire, and brake rotary cams 8, 9 stop the overhead wire. With such a configuration, it is possible to stop when the rotation of the brake cams 8 and 9 exceeds a predetermined inclination.

Next, a description will be given of a wheel with a sensor according to a seventh embodiment of the present invention. FIG. 26, FIG. 27, and FIG. 28 are cross-sectional configuration diagrams of the wheel with sensor of the present embodiment. As shown in FIG. 26, the wheel with sensor 350 of the present embodiment includes:
The wedge cams 60a, 61a for the brakes are used instead of the rotary cams 8, 9 for the brakes of the wheel with sensor 250 of the fifth embodiment.
Is added.

The link member 40 of the sensor units 40 and 41
Springs 60b and 61b are attached to one ends of the cylinders c and 41c, and brake wedge cams 60a and 61a are attached to the other ends of the springs 60b and 61b. The cam connecting pins 60c, 61 are attached to the wedge cams 60a, 61a for brake.
c are provided, and the cam connecting pins 60c and 61c
The movement direction is restricted by guide grooves 60 d and 61 d provided in the outer frame 1, and the wedge cam 60
a and 61a are guided only in a predetermined direction. The brake wedge cams 60a and 61a are cam holding rollers 60e and 6b.
When 1e contacts the tapered portion, the brake wedge cams 60a and 61a are moved downward. The wheel with sensor 350 has such a configuration.

Next, the behavior of the wedge cams 60a and 61a for braking due to the inclination of the overhead wire will be schematically described. When a normal overhead wire is extended, as shown in FIG.
The brake wedge cams 60a and 61a contact the overhead wire, but do not press the overhead wire, but move the overhead wire smoothly. Also, since the cam pressing rollers 60e and 61e do not contact the tapered portion, the wedge cam 60
a, 61a can move up and down and do not press the overhead wire.

In the case where the wire diameter of the overhead wire is increased as shown in FIG. 27, the arrow v of the link members 40c, 41c
In the direction of arrow w, pulling the spring portions 60b, 61b in the direction of the arrow w, abutting the cam connecting pins 60c, 61c at positions vertically movable in the guide grooves 60d, 61d, and a wedge cam for braking when the wire diameter is large. Following the rise in the arrow x direction of 60a and 61a, the wire is passed through the overhead wire having a large wire diameter. Further, since the brake wedge cams 60a and 61a are maintained at positions where the cam pressing rollers 60e and 61e do not abut against the tapered portion, the brake wedge cams 60a and 61a do not press the overhead lines. In the case of L <L1 in the figure, the cam operates at the connection point, and the line is stopped.

In the case where the overhead wire is inclined as shown in FIG. 28, the link members 40c, 41c are lowered in the direction of the arrow y, and the support points of the spring portions 60b, 61b are moved by the arrow z of the brake wedge cams 60a, 61a. The cam pressing rollers 60e, 61e abut against the tapered portions of the brake wedge cams 60a, 61a, and the cam pressing rollers 60e, 61e move the brake wedge cams 60a, 61a.
Is guided in the direction of arrow A, and the overhead wire is lowered in the direction of arrow B to stop the overhead wire. With such a configuration, the brake wedge cams 60a and 61a can be stopped when the inclination exceeds a predetermined inclination.

Next, a description will be given of a wheel with a sensor according to an eighth embodiment of the present invention. FIG. 29 is a cross-sectional configuration diagram of the wheel with a sensor according to the present embodiment. The wheel with a sensor 400 of the present embodiment is a modification of the sensor unit of the seventh embodiment. In FIG. 29, sensor units 70 and 71 are newly added in addition to the configuration of the sensor wheel of the sixth embodiment. These sensor parts 70 and 71 are replaced with the inclination of the overhead wire,
Detects the moving amount, moving speed, and moving acceleration.

The sensor units 70 and 71 include rollers 70a and 71a that follow the overhead wire, first links 70b and 71b on which the rollers are rotatably supported, and first links 70b and 71.
b and the second links 70c and 71c which are rotatably supported by b.
And third links 70d, 71d rotatably supported by the second links 70c, 71c. in this case,
The other ends of the first links 70b and 71b are urged in the direction of arrow C by a torsion coil spring (not shown).
It is made to be in the state of.

Next, the behavior of the brake wedge cams 60a and 61a due to the inclination of the overhead wire will be schematically described. When the rollers 70a and 71a that follow the overhead wire move in the direction of arrow D following the overhead wire due to a frictional resistance greater than the urging force of the torsion coil spring, and when each link moves as shown by the dotted line in FIG. Wedge cams 60a, 61
"a" behaves as described in the seventh embodiment, and stops the overhead line. According to this structure, the extension of the overhead wire can be stopped when an abnormality occurs in the moving amount, the moving speed, and the moving acceleration of the overhead wire.

Next, a description will be given of a wheel with a sensor 450 according to a ninth embodiment of the present invention. FIGS. 30, 31, and 32 are sectional configuration diagrams of the wheel with a sensor of the present embodiment. The wheel with a sensor 450 of the present embodiment is a modification of the sensor unit of the seventh embodiment. In FIG. 30, sensor units 80 and 81 are newly added in addition to the configuration of the sensor wheel of the sixth embodiment. The sensor units 80 and 81 detect both abnormalities in the movement shape and inclination of the overhead wire.

The sensor portions 80 and 81 include driven members 80a and 81a that contact and follow the overhead wire, first links 80b and 81b to which the driven members 80a and 81a are movably attached while being biased by springs, and a first link. First link support shafts 80c and 81c rotatably supporting the first and second links 80b and 81b, second links 80d and 81d rotatably supported by the first links 80b and 81b, and second links 80d and 81d. Link support shafts 80e and 81e rotatably supporting the first and second wires 80f and 81e connected to followers 80a and 81a.
f, the second wires 80g, 81g connected to the second links 80d, 81d, and the third link 8 connecting the first wires 80f, 81f and the second wires 80g, 81g together.
0h and 81h are provided. Wheel 45 with sensor
0 has such a configuration.

Next, the behavior of the wedge cams 60a and 61a for the brake depending on the moving amount and moving speed of the overhead wire will be schematically described. When the normal overhead wire is extended, as shown in FIG.
Although a and 61a are in contact, they do not press the overhead wire, but move the overhead wire smoothly. Further, since the brake wedge cams 60a and 61a are located at positions where the cam pressing rollers 60e and 61e do not abut against the tapered portion, the brake wedge cams 60a and 61a do not press the overhead lines.

As shown in FIG. 31, when the movement of the overhead wire becomes large, the followers 80a, 81a move in the direction of arrow E, the first wires 80f, 81f move in the direction of arrow F, and the third links 80h, The rotation of 81h in the direction of arrow G, the fulcrum of the spring portions 60b, 61b moves in the direction of arrow H, and the cam pressing rollers 60e, 61e abut against the tapered portions of the brake wedge cams 60a, 61a.
0e and 61e guide the brake wedge cams 60a and 61a in the direction of arrow I to press the overhead wire and stop the overhead wire.

In the case where the overhead wire is inclined as shown in FIG. 32, the first links 80b, 81b rotate in the direction of the arrow J as the followers 80a, 81a descend, and the second links 80c, 81c rotate. Rotation in the direction of arrow K, second wire 80
Arrow L of the third link 80f, 81f via g, 81g
In this direction, the fulcrum of the spring portions 60b and 61b moves, and the cam pressing rollers 60e and 61e abut against the tapered portions of the brake wedge cams 60a and 61a, and the cam pressing rollers 60e and 61e are moved by the brake wedge cams 60a. , 61
a is guided in the direction of arrow M, and the overhead wire is pressed to stop the overhead wire. According to this structure, the extension of the overhead wire can be stopped when an abnormal extension of the overhead wire or an abnormal inclination of the overhead wire occurs.

Next, a description will be given of a wheel with a sensor 500 according to a tenth embodiment of the present invention. FIG. 33 is a sectional configuration diagram of the wheel with a sensor according to the present embodiment. As shown in FIG. 33, the wheel with a sensor 500 according to the present embodiment includes a pair of rollers 4,5, elastic rubber portions 6,7 disposed between the rollers 4,5, and an outer frame. 1, the guide grooves 90a and 91a, the brake followers 90b and 91b guided by the guide grooves 90a and 91a, and the follower restraining portion 90 for restraining the movement of the brake followers 90b and 91b.
c and 91c, encoders 90d and 91d which are specific examples of the sensor unit of the present invention and detect the state of the overhead line, drive control units 90e and 91e which calculate by using encoder pulses to determine the state of the overhead line, Solenoids 90f, 91f driven by the control units 90e, 91e are provided. Solenoids 90f, 91f follower restraint 90c,
91c are connected, and the follower restraining portions 90c, 91c
Is driven.

Next, the behavior of the brake followers 90b and 91b depending on the state of the overhead wire will be schematically described. The rotation of the rollers 4 and 5 following the overhead wire is performed by encoders 90d and 91.
d, and when the moving amount, moving speed, and moving acceleration are large, the solenoids 90f, 91f are driven by the follower restraining portion 90 based on the control of the drive controls 90e, 91e.
c, 91c are pulled in. In this case, the guide grooves 90a, 91
a can pass, and the brake followers 90b, 91b fall in the direction of arrow N in FIG. 33, and come into contact with the overhead wire.

The brake follower 90b driven by the overhead wire,
Reference numeral 91b moves downward by the guide grooves 90a and 91a, presses the overhead wire, and stops the overhead wire. According to this structure, the extension of the overhead line can be stopped when an abnormality occurs in the extension of the overhead line. Also, even if the anti-back rotating cams 30 and 31 move in the direction opposite to the extending direction, the overhead wire can be stopped.

Next, a description is given of a wheel with a sensor 550 according to an eleventh embodiment of the present invention. FIG. 34 is a cross-sectional configuration diagram of the wheel with a sensor according to the present embodiment. As shown in FIG. 34, the wheel with a sensor 550 of the present embodiment includes a pair of rollers 4 and 5, elastic rubber portions 6 and 7 disposed between the rollers 4 and 5, and sensor portions 110 and 111. And the sensor unit 11
Spring 110a, 111a attached to 0,111
And brake followers 110b and 111b to which the springs 110a and 111a are attached, substantially V-shaped guide grooves 110c and 111c provided on the outer frame 1 and guiding the brake followers 110b and 111b. Groove 1
The guide grooves 110c, 11c are provided in the middle of 10c, 111c.
Decision unit 110 for limiting the movement inclination direction of 1c
d, 111d.

Next, the behavior of the brake followers 110b and 111b depending on the state of the overhead wire will be schematically described. The guide grooves 110c and 111 are determined by the determination units 110d and 111d.
Limit the direction of c. As shown in FIG.
The guiding grooves 110c and 111c having a character shape are determined by the determining units 110d and 1c.
By 11d, the groove is limited to a substantially / character-shaped groove which faces downward with respect to the extension direction of the overhead wire. When the sensor units 110 and 111 following the overhead line detect the inclination, the sensor unit 11
0,111 are lowered to the lower side to make springs 110a, 111a
The brake followers 110b and 111b are moved in the direction of arrow O by the guide grooves 110c and 111c while pressing, and press the overhead wire to stop the overhead wire. Note that the presence of the determination units 110d and 111d prevents a situation in which the brake followers 110b and 111b move to the other guide groove.

The direction of the determining unit can be changed manually. As shown in FIG. 34 (b), the guide grooves 110c and 111c having a substantially V shape are used as the determining units 110d and 111c.
By d, the groove can be limited to a substantially ＼-shaped groove that faces downward with respect to the direction opposite to the extension direction of the overhead wire, and can be used as an anti-back wheel. Spring parts 110a, 1
11a, the brake followers 110b, 11
1b is connected to the guide groove 11 on the opposite side as shown in FIG.
After being slidably attached to Oc and 111c, brake followers 110b and 111b are arranged so as to contact the overhead wire. If the overhead wire moves in the direction opposite to the extending direction, the overhead wire is moved in the direction of arrow P by the guide grooves 110c and 111c to press the overhead wire and stop the overhead wire. Note that the presence of the determination units 110d and 111d prevents a situation in which the brake followers 110b and 111b move to the other guide groove.

Next, a description will be given of a wheel with a sensor 600 according to a twelfth embodiment of the present invention. FIG. 35 is a cross-sectional configuration diagram of a wheel with a sensor according to the present embodiment. As shown in FIG. 35, the wheel with sensor 600 of the present embodiment includes a pair of rollers 4, 5, elastic rubber portions 6, 7 disposed between the rollers 4, 5, encoders 120a, 121a. , Two drive control units 120b, 121b, 120c, 121c connected to the encoders 120a, 121a, and a solenoid 120 connected to the drive control units 120b, 121b.
d, 121d, solenoids 120e, 121e connected to the drive control units 120c, 121c, and the solenoid 1
Follower restraints 120g, 121g attached to 20d, 121d, 120e, 121e, and follower restraint 1
It has brake followers 120h and 121h whose behavior is determined by 20g and 121g, and guide grooves 120i and 121i for guiding the brake followers.

Next, the behavior of the brake followers 120h and 121h depending on the state of the overhead wire will be schematically described. 1
20g is fixed at the center by left and right springs, operates by operating 120b and 120c, and has an anti-run / anti-back function. Encoders 120a, 121a
Output pulses from the two drive control units 120b and 12
1b and the drive control units 120c and 121c. The drive control units 120b, 1 shown on the left side of FIG.
21b and the drive control units 120c and 121c on the right side
Detects whether the direction of the extension line is forward or reverse. Thus, the encoders 120a and 121a have the function of detecting normal rotation and reverse rotation. When the moving amount, moving speed, and moving acceleration of the overhead wire are larger than predetermined values in the forward direction of the extension direction of the overhead wire, as shown in FIG. 35B, the determination unit is determined by the solenoids 120d and 121d. 120f and 121f move in the direction of arrow Q, and the solenoids 120e and 121e move the follower restraining portions 120g and 121g in the direction of arrow R. In this case, the guide grooves 120i, 121
Passed to i. Brake followers 120h, 121
h falls in the direction of arrow S along the guide grooves 120i and 121i. Then, the movement of the overhead wire in the forward direction is stopped.

On the other hand, when the direction of extension of the overhead wire is reversed, the brake followers 120h and 121h are guided to the other guide grooves 120i and 121i. In this case, it plays a role as an anti-back car. This decision unit 12
The direction can be automatically changed by 0f and 121f.

Next, a description is given of a wheel with a sensor 650 according to a thirteenth embodiment of the present invention. FIG. 36 is a cross-sectional configuration diagram of a wheel with a sensor according to the present embodiment. As shown in FIG. 36, the wheel with a sensor 650 of the present embodiment includes a pair of rollers 4 and 5, elastic rubber portions 6 and 7 disposed between the rollers 4 and 5, encoders 130a and 131a, and , Two drive control units 130b, 131b, 130c, 131c connected to the encoders 130a, 131a, and a solenoid 130 connected to the drive control units 130b, 131b.
d, 131d, solenoids 130e, 131e connected to the drive control units 130c, 131c, and the solenoid 1
Deciding unit 130f, 1 attached to 30d, 131d
31f, follower restraints 130g and 131g attached to the solenoids 130e and 131e,
f, 131f and the followers 130h, 13g whose behavior is determined by the follower restraints 130g, 131g.
1h, a guide groove 130i for guiding the follower for brake,
131i. In the eleventh embodiment, the determining unit 1
20f and 121f are slidably provided in the horizontal direction, whereas in the present embodiment, the determination units 130f and 131f are:
They differ in that they are provided rotatably.

Next, the behavior of the brake followers 130h and 131h depending on the state of the overhead wire will be schematically described. Output pulses from the encoders 130a and 131a are supplied to the two drive control units 130b and 131b and the drive control unit 13
0c and 131c. Drive control units 130b and 131b shown on the left side of FIG.
The drive control units 130c and 131c shown on the right side of FIG.
Detects whether the direction of the extension line is forward or reverse. It is the forward direction of the extension of the overhead line,
When the moving acceleration is larger than a predetermined value, FIG.
6 (b), the solenoids 130d, 131d
As a result, the decision units 130f and 131f are driven in the direction of arrow T, and the solenoid restraints 130g and 131g are driven in the direction of arrow U by the solenoids 130e and 131e. The brake followers 130h, 131h are provided with guide grooves 130i, 1
It falls in the direction of arrow V along 31i, and stops the movement of the overhead wire in the forward direction.

On the other hand, when the direction of extension of the overhead wire is reversed, the brake followers 130h and 131h are guided to the other guide grooves 130i and 131i. In this case, it plays a role as an anti-back car. This decision unit 13
The directions of 0f and 131f can also be automatically changed.

The wheel with a sensor of each embodiment has been described above. The use of the wheel with the sensor prevents the sag from occurring. In all of these embodiments, the description has been given of a sensor-equipped wheel that is a double wheel. However, the present invention is not limited to two wheels, and may be a single wheel with a sensor or three or more wheels with a sensor. Whether to use a single or multiple wheels with sensors is determined arbitrarily by the method of laying the overhead wire.

[0098] Further, the wheel with a sensor is provided so that the large-diameter overhead wire and the small-diameter overhead wire pass through.
It is also possible to use a sensor-equipped wheel for both overhead wires having the same diameter without discriminating the small diameter. These are also arbitrarily determined by the method of laying the overhead wire.

Further, as other examples of the cam driving section, a normal motor for driving the rotating cam for brake or a ventilation fan motor for applying a pulling force to the rotating cam for motor and rotating instantaneously can be used. These are appropriately selected.

As shown in FIG. 38, it is desirable that the brake-like rotating cam be provided with a hole 1000 and a groove 2000 when actually used. The holes and the grooves may be provided on the anti-back rotation cam and the wedge cam without being limited to the brake rotation cam. These configurations are appropriately selected.

[0101]

According to the present invention, the rotary cam for brake and the encoder are moved by the frame member in accordance with the wire diameter of the overhead wire, so that no trouble occurs in the extension of the wire. In general, according to the present invention, at the time of normal overhead wire extension, the overhead wire is made free to move without restraint, and the overhead wire is extended in the overhead wire extension direction only when abnormalities such as abnormal inclination and abnormal speed of the overhead wire are detected. By stopping the operation, it is possible to provide a sensor-equipped wheel that improves the safety of the overhead wire laying operation.

[Brief description of the drawings]

FIG. 1 is a front view of a wheel with a sensor according to a first embodiment of the present invention.

FIG. 2 is a right side view of the wheel with a sensor according to the first embodiment of the present invention.

FIG. 3 is a plan view of the wheel with a sensor according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram for explaining the installation of the overhead wire of the wheel with a sensor according to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating an A-wheel of a wheel with a sensor according to the first embodiment of the present invention.
It is explanatory drawing explaining the inside view by the A line cross section.

FIG. 6 is a perspective view of an A-wheel of the wheel with sensor according to the first embodiment of the present invention.
It is explanatory drawing explaining the inside view by the A line cross section.

FIG. 7 is a perspective view of an A-wheel of the wheel with sensor according to the first embodiment of the present invention.
It is explanatory drawing explaining the inside view by the A line cross section.

FIG. 8 is an explanatory diagram for explaining a cam curve of a brake rotating cam of the wheel with a sensor according to the first embodiment of the present invention.

FIG. 9 is an explanatory diagram illustrating a brake operation of the wheelbarrow with the sensor according to the first embodiment of the present invention.

FIG. 10 is a block diagram of an electric system of the wheelbarrow with the sensor according to the first embodiment of the present invention.

FIG. 11 is a configuration diagram of an improved solenoid of the wheel with a sensor according to the first embodiment of the present invention.

FIG. 12 is an explanatory diagram for explaining a mounting mode of a wheel with a sensor according to the present invention.

FIG. 13 is an explanatory diagram illustrating an attachment form of the wheel with a sensor according to the present invention.

FIG. 14 is a sectional configuration view of a wheel with a sensor according to a third embodiment of the present invention.

FIG. 15 is a sectional configuration diagram of a wheel with a sensor according to a fourth embodiment of the present invention.

FIG. 16 is a front view of a wheel with a sensor according to a fifth embodiment of the present invention.

FIG. 17 is a left side view of a wheel with a sensor according to a fifth embodiment of the present invention.

FIG. 18 is a plan view of a wheel with a sensor according to a fifth embodiment of the present invention.

FIG. 19 is an explanatory diagram for explaining cable attachment of a wheel with a sensor according to a fifth embodiment of the present invention.

FIG. 20 is a diagram illustrating a B of a wheel with a sensor according to a fifth embodiment of the present invention.
It is explanatory drawing explaining the inside view by the -B line cross section.

FIG. 21 is a diagram illustrating a B of a wheel with a sensor according to a fifth embodiment of the present invention;
It is explanatory drawing explaining the inside view by the -B line cross section.

FIG. 22B shows a wheelbarrow with a sensor according to the fifth embodiment of the present invention.
It is explanatory drawing explaining the inside view by the -B line cross section.

FIG. 23 is a sectional configuration view of a wheel with a sensor according to a sixth embodiment of the present invention.

FIG. 24 is a sectional view showing a configuration of a wheel with a sensor according to a sixth embodiment of the present invention.

FIG. 25 is a sectional configuration view of a wheel with a sensor according to a sixth embodiment of the present invention.

FIG. 26 is a sectional configuration view of a wheel with a sensor according to a seventh embodiment of the present invention.

FIG. 27 is a sectional configuration view of a wheel with a sensor according to a seventh embodiment of the present invention.

FIG. 28 is a sectional configuration view of a wheel with a sensor according to a seventh embodiment of the present invention.

FIG. 29 is a sectional configuration view of a wheel with a sensor according to an eighth embodiment of the present invention.

FIG. 30 is a sectional view of a wheel with a sensor according to a ninth embodiment of the present invention.

FIG. 31 is a sectional configuration view of a wheel with a sensor according to a ninth embodiment of the present invention.

FIG. 32 is a sectional view showing a configuration of a wheel with a sensor according to a ninth embodiment of the present invention.

FIG. 33 is a sectional configuration view of a wheel with a sensor according to a tenth embodiment of the present invention.

FIG. 34 is a sectional configuration view of a wheel with a sensor according to an eleventh embodiment of the present invention.

FIG. 35 is a sectional configuration view of a wheel with a sensor according to a twelfth embodiment of the present invention.

FIG. 36 is a sectional view of a wheel with a sensor according to a thirteenth embodiment of the present invention.

FIG. 37 is an explanatory diagram for explaining the hanging of the overhead wire generated by the overhead wire laying method using the anti-back metal wheel.

FIG. 38 is an explanatory diagram for explaining another example of the rotating cam for brake.

FIG. 39 is a sectional configuration view of a wheel with a sensor according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer frame 1a Steel plate 1b, 1c Cylindrical support 1d Bolt 1f Nut 2, 3 Roller frame 2a, 3a Shaft support 2b, 3b Screw fastening 4, 5 Roller 6, 7 Elastic rubber part 8, 9 Brake rotary cam 10 Metal wheel arm mounting part 10a Mounting part main body 10b Rod 10c Screw fastening part 11,12 Guide roller 13,14 Frame member 15,16 Encoder 15a, 16a Rotator 17,18 Solenoid 17a, 18a Protruding rod 17b, 18b For protruding rod Energizing part 17c, 18c Restricting part 17d, 18d Retaining part urging part 17e, 18e Cover 20, 21 Drive control part 30, 31 Anti-back rotating cam 32, 33 Roller 34, 35 Induction roller 40, 41 Sensor part 40a , 41a Support frame 40b, 41b Post 40c, 41c Link members 40d, 41d Supports 40e, 41e Followed rollers 50a, 51a First link 50b, 51b Link support shaft 50c, 51c Second link 50d, 51d Cam support shaft 50e, 51e Third link 60a, 61a Brake wedge cam 60b, 61b Spring 60c, 61c Cam connecting pin 60d, 61d Guide groove 60e, 61e Cam holding roller 70, 71 Sensor unit 70a, 71a Roller 70b, 71b First link 70c, 71c Second link 70d, 71d Third link 80, 81 Sensor Part 80a, 81a Follower 80b, 81b First link 80c, 81c First link support shaft 80d, 81d Second link 80e, 81e Second link support shaft 80f, 81f First wire 80g, 81g Second wire 80h, 81h 3 links 90a, 9 a Guide groove 90b, 91b Follower for brake 90c, 91c Follower restraint section 90d, 91d Encoder 90e, 91e Drive control section 110a, 111a Spring 110b, 111b Follower for brake 110c, 111c Guide groove 110d, 111d Determination section 110e, 111e Drive control unit 120a, 121a Encoder 120b, 121b Drive control unit 120c, 121c Drive control unit 120d, 121d Solenoid 120e, 121e Solenoid 120g, 121g Follower restraint unit 120h, 121h Brake follower 120i, 121i Guide groove 130a, 131a Encoders 130b, 131b Drive control units 130c, 131c Drive control units 130d, 131d Solenoids 130e, 131e Solenoids 130f, 131f Determination Parts 130g, 131g Follower moving parts 130h, 131h Brake followers 130i, 131i Guide grooves 100 Wheels with sensors 101 Anti-back wheels 102 Power poles 103 Mounting brackets 103a, 103b Gold wheels

Claims (16)

[Claims] An at least one pair of rollers that rotate in accordance with an extended overhead wire; and a receiving member disposed between the pair of rollers in a state where there is a gap apart from the extended overhead wire. A frame member rotatably supported at one end and moving at the other end following the overhead wire, a sensor unit attached to the frame member and outputting a detection value according to the movement of the overhead wire, A rotating cam for a brake, which is rotatably disposed at a position facing the receiving member and has a cam curve having a different radius from the rotating shaft; and a cam for rotating the rotating cam for the brake. A driving wheel, electrically connected to the sensor unit and the cam driving unit, and a drive control unit for arithmetically processing the output of the sensor unit to control the cam driving unit; With frame members according to the wire diameter When the drive control unit determines that the extension of the overhead wire has become abnormal based on the output from the sensor unit, the cam drive unit rotates the brake unit for braking. Rotate the cam to follow the overhead wire, rotate it to increase the radius of the brake rotary cam and narrow the overhead wire path, and the brake rotary cam presses the overhead wire downward to form a receiving member. A wire wheel with a sensor, wherein an overhead wire is inserted into a gap, and the overhead wire is stopped by sandwiching the overhead wire between a receiving member and a rotary cam for braking. 2. The wheel with a sensor according to claim 1, wherein the rotary cam for brake is rotatably supported by the frame member and is urged to rise with respect to the frame member. A wheel with a sensor, wherein a frame member moves according to the diameter, and a brake rotation cam attached to the frame member moves to avoid contact with an overhead wire. 3. The wheel with a sensor according to claim 1 or 2, wherein the cam drive unit includes: a moving unit that moves the rotary cam for braking; a restraining unit that restrains the movement of the moving unit; And a solenoid for releasing the restraint of the moving unit by the drive unit. The drive control unit drives the solenoid when the drive control unit determines that the extension of the overhead wire has become abnormal based on the output from the sensor unit. A wheel with a sensor, characterized in that the restraint by the part is released, the moving part is moved, and the rotating cam for brake is rotated to stop the movement of the overhead wire by rotating the rotating cam for brake. 4. A wheel with a sensor according to any one of claims 1 to 3, wherein the wheel is rotatably disposed at a position facing the receiving member with the overhead wire interposed therebetween, and a rotating shaft. And a sensor wheel provided with an anti-back rotary cam formed to have a cam curve having a radius different from the anti-back rotary cam. To increase the radius of the anti-back rotary cam when the overhead wire moves in the opposite direction of the extension of the overhead wire by rotating to reduce the radius of the overhead wire. The anti-back rotary cam presses the overhead wire down, causing the overhead wire to enter the gap between the receiving members, sandwiches the overhead wire between the receiving member and the anti-back rotary cam, and stops the overhead wire from moving. Rotary cam Sensor with gold vehicle, characterized in that to stop the overhead line to be determined and has brought about an abnormality regardless of the extension line direction using the rotation cam for anti back. 5. The wheel with a sensor according to claim 1, wherein the rotary cam for braking has a hole and / or a groove. 6. The wheel with a sensor according to claim 4, wherein the anti-back rotary cam has a hole and / or a groove. 7. The wheel with a sensor according to any one of claims 1 to 6, wherein the receiving member is provided with a contact surface of an overhead wire in a rough surface by a projection or a groove. Car with sensor. 8. The gold wheel with a sensor according to claim 1, wherein the arithmetic processing of the drive control unit can be manually set freely, and the extension of the overhead wire is performed by an output from the sensor unit. A wheel with a sensor, wherein a speed at which the drive control unit determines that an abnormality has occurred can be set. 9. A pair of at least one pair of rollers that rotate following an extended wire, and a receiving member disposed between the pair of rollers in a state where there is a gap between the at least one extended wire and a gap. A rotating cam for a brake, which is rotatably disposed at a position facing the receiving member with the overhead wire interposed therebetween, and which is formed so as to have cam curves having different radii from the rotating shaft; and a rotating cam for the brake. A wheel with a sensor, comprising: a sub-roller rotatably supported and rotated in accordance with an overhead wire; and a sensor section for moving a brake rotary cam in accordance with an inclination of the overhead wire. At the time of extension, the overhead wire is driven by the auxiliary roller of the brake rotary cam so that the brake rotary cam and the overhead wire are not in contact with each other. When the wire diameter of the overhead wire is large, the sensor unit raises the brake rotary cam. Move and brake on this overhead line Avoid the situation where the rotating cams come into contact with each other.When the overhead wire is inclined, the sensor rotates the brake rotating cams down to follow the overhead wires, and rotates the brake rotating cams to increase the radius. The passage of the overhead wire is narrowed, and the rotating cam for the brake presses the overhead wire downward to allow the overhead wire to enter the gap between the receiving members, and sandwiches the overhead wire between the receiving member and the rotating cam for the brake to stop the movement of the overhead wire. A wheel with a sensor. 10. At least a pair of rollers that rotate in accordance with an extended overhead wire, and a receiving member disposed between the pair of rollers in a state of being spaced from the extended overhead wire and having a gap. A wedge cam for brake disposed at a position facing the receiving member with the overhead wire interposed therebetween, a cam pressing roller for moving the wedge cam for brake downward, and a cam connecting pin protruding from the wedge cam for brake. A wagon cam with a sensor, comprising: a guiding groove for guiding; and a sensor unit for moving a brake wedge cam in accordance with the inclination and / or movement of the overhead wire, wherein the wedge cam and the cam for brake are used when the overhead wire is normally extended. The wedge cam for brake can be moved up and down according to the wire diameter of the overhead wire by keeping the holding roller out of contact with the holding roller and the cam connecting pin being movable up and down along the guide groove. When the overhead wire tilts and / or moves beyond a predetermined standard, the sensor moves the brake wedge cam to a position where it comes into contact with the cam holding roller, and the overhead wire and the cam holding roller engage the brake wedge cam. To move the wedge cam for brake downward, the wedge cam for brake presses the overhead wire downward, and the overhead wire enters the gap between the receiving members, and the overhead wire is sandwiched between the receiving member and the wedge cam for brake. A wheel with a sensor, wherein the movement of the overhead wire is stopped by using. 11. At least a pair of rollers that rotate following an extended wire, and a receiving member disposed between the pair of rollers in a state where there is a gap apart from the extended wire. A guide groove provided at least obliquely so as to face downward with respect to the extension direction of the overhead wire, a brake follower guided by the guide groove, a follower restraining portion for restraining the brake follower, A wheel drive wheel with a sensor, comprising: a sensor unit for detecting a state; and a drive control unit electrically connected to the sensor unit and the follower restraining unit, for calculating the output of the sensor unit and controlling the follower restraint unit. When the drive control unit determines that the output of the sensor unit has caused an abnormality in the extension of the overhead wire, the follower restraining unit is driven to release the restraint of the brake follower and the brake is guided by the guide groove. Guide the follower downward, and The brake follower is moved to the lower side by moving the brake follower into the guide groove, and the brake follower presses the overhead wire downward, so that the overhead wire enters the gap between the receiving member and the receiving member and the brake. A wheel with a sensor, characterized in that the overhead wire is sandwiched between the driven follower and the movement of the overhead wire is stopped. 12. The wheel with a sensor according to claim 11, wherein the guide groove is a groove formed in a substantially V shape, a substantially U shape, a substantially human shape, or a substantially Λ (lambda) shape. A wheel with a sensor that determines a guide follower to be guided only in a guide groove in one direction, wherein the guide wheel moves in either the forward direction or the reverse direction in the extension direction by the guide groove determined by the determiner. It is determined whether the overhead wire is stopped, and when the overhead wire that moves in the forward direction is stopped, the brake follower is guided in a guide groove that is provided diagonally so as to face downward with respect to the extension direction of the overhead wire, and in the reverse direction. In order to stop the overhead wire that moves, the brake follower is guided obliquely so as to face downward with respect to the direction opposite to the extension direction of the overhead wire, and the brake follower in any guide groove When the brake follower is A sensor, wherein the brake follower presses the overhead wire down, causing the overhead wire to enter the gap between the receiving members, and sandwiches the overhead wire between the receiving member and the brake follower to stop the movement of the overhead wire. With gold car. 13. The gold wheel with a sensor according to claim 12, wherein the determining unit is manually operated to stop only one of the overhead wire extending abnormally in the forward direction and the overhead wire feeding in the reverse direction. A wheel with a sensor set to: 14. The wheel with a sensor according to claim 11, wherein the arithmetic processing of the drive control unit can be manually set freely, and the extension of the overhead wire is performed by an output from the sensor unit. A wheel with a sensor, wherein a speed at which the drive control unit determines that an abnormality has occurred can be set. 15. The sensor-equipped wheelbarrow according to claim 12, wherein: a sensor for outputting a detection value according to the movement of the overhead wire; a deciding unit driving unit for driving the deciding unit; And a control operation unit that controls the determination unit, and when the drive control unit determines that the extension of the overhead line has become abnormal based on the output from the sensor unit, drives the determination unit drive unit to determine the determination unit Is operated to detect and stop both the overhead wire that extends abnormally in the forward direction and the overhead wire that runs backward in the reverse direction. 16. A wheel with a sensor according to any one of claims 1 to 15, wherein the wheel with a sensor is attached to a support, and a device capable of checking and restoring before use is provided. Characteristic wheel with sensor.