JP7259501B2 - Power cable meandering detection device and power cable meandering detection system - Google Patents

Description

The present disclosure relates to a power cable meandering detection device, a power cable meandering detection system, and a power cable laying method.

Conventionally, when laying a long and heavy power cable in a tunnel or the like, a plurality of motor rollers (eg, Patent Document 1) are arranged at predetermined intervals in the tunnel, and the power cable is conveyed by the motor rollers. is being done.

JP-A-11-341634

When laying a long and heavy power cable, typically 100 m or more in length and weighing several kg/m or more, in an existing tunnel or the like, the power cable meanders greatly. It is desirable to prevent

A power cable may be added to an existing tunnel or the like, or an existing power cable may be replaced. In the above case, power cables and various types of piping are normally housed in tunnels, etc., unlike newly constructed tunnels. Therefore, when laying a new power cable in an existing tunnel or the like, if the new power cable meanders particularly to the left or right, it may come in contact with the above-mentioned stored items or the inner wall of the tunnel or the like.

The meandering described above is considered to occur when the power cable is conveyed by a plurality of motorized rollers, and the conveying speeds of the motorized rollers differ. For example, at least one of the following factors can be considered as the cause of the different conveying speeds of the motor rollers.
(1) The number of rotations of each motor roller is different.
(2) The friction force between each motor roller and the power cable is different.
(3) Slip occurs.

The number of rotations of each motor roller may be varied according to the slope of the sinus road or the like and the bending angle in the horizontal direction. In addition, the above-mentioned frictional force may differ due to the fact that the load from the power cable applied to each motor roller differs depending on the gradient and bending angle. A difference in the frictional force may also occur due to the difference in the rotational speed. Depending on the slope and the bending angle, the frictional force may be insufficient and the power cable may slip.

For this reason, there is room for examination of measures to prevent the power cable from significantly meandering when the power cable is installed using a plurality of motor rollers.

Accordingly, one object of the present disclosure is to provide a power cable meandering detection device capable of detecting meandering power cables during installation. Another object of the present disclosure is to provide a power cable meandering detection system and a power cable installation method that can prevent the power cable from significantly meandering during installation.

The power cable meandering detection device of the present disclosure includes:
a pair of poles spaced apart;
a pedestal for tiltably supporting at least one of the poles;
a switch section that operates in accordance with the tilting of the pole section;
and a transmitting section that transmits a signal indicating the tilting of the pole section to the receiving section in accordance with the operation of the switch section.

The power cable meandering detection system of the present disclosure includes:
a plurality of conveyors arranged at predetermined intervals along a laying route to send out power cables along the laying route;
a control unit that controls the operation of the conveying machine;
a power cable meandering detection device of the present disclosure disposed between the conveying machines;
and the receiving unit,
The control unit
A stop control section is provided for stopping driving of all the conveying machines when the receiving section receives the signal.

The power cable laying method of the present disclosure includes:
A method for laying a power cable in which a plurality of conveyors are arranged on an installation route at predetermined intervals and the power cable is conveyed by the plurality of conveyors,
a first step of performing at least one of mechanically and optically detecting meandering of the power cable between the conveyors;
a second step of stopping driving of all the conveying machines when meandering of the power cable is detected;
and a third step of correcting meandering of the power cable.

The power cable meandering detection device of the present disclosure can detect meandering of the power cable during installation. The power cable meandering detection system of the present disclosure and the power cable installation method of the present disclosure can prevent the power cable from significantly meandering during installation.

FIG. 1 is a schematic front view showing the power cable meandering detection device of the embodiment, showing a state in which the pole portion is upright. FIG. 2 is a partial plan view of a region on one end side of the housing from the axial direction of the pole portion in the power cable meandering detector of the embodiment. FIG. 3 is a schematic front view showing the power cable meandering detection device of the embodiment, showing a state in which the pole portion is tilted. FIG. 4 is a schematic configuration diagram showing the power cable meandering detection system of the embodiment.

[Description of Embodiments of the Present Disclosure]
First, the embodiments of the present disclosure are listed and described.
(1) A power cable meandering detector according to an aspect of the present disclosure includes:
a pair of poles spaced apart;
a pedestal for tiltably supporting at least one of the poles;
a switch section that operates in accordance with the tilting of the pole section;
and a transmitting section that transmits a signal indicating the tilting of the pole section to the receiving section in accordance with the operation of the switch section.

The power cable meandering detection device of the present disclosure can detect meandering of the power cable by being used as follows when laying the power cable using a plurality of conveyors (e.g., motor rollers). .

The meandering detection device is arranged between conveying machines that are spaced apart from each other. If the power cable meanders enough to touch one of the poles as it travels between the two poles, the one of the poles falls down. As the pole portion tilts, the switch portion operates. That is, the tilting motion of the pole portion is detected as meandering of the power cable. A signal associated with the tilting of the pole (hereinafter referred to as a tilting signal) is sent from the transmitter to the controller for controlling the operation of the carrier via the receiver. The control unit typically stops driving all the conveying machines when the tilt signal is received. Stopping all transports prevents the power cable from further tortuous, ie, tortuous.

Such a power cable meandering detection device of the present disclosure is used when laying a long and heavy power cable in an existing tunnel or the like as described above, thereby preventing the power cable from significantly meandering. contribute to the prevention of Further, the power cable meandering detection device of the present disclosure has a simple configuration and is excellent in manufacturability.

(2) As an example of the power cable meandering detection device of the present disclosure,
The pedestal is
a housing having a surface for supporting the lower end surface of the pole portion;
and a pin portion that is tiltably supported,
The housing is
A notch that opens at a position that intersects the tilting trajectory of the pin portion,
The pole portion has a hole opening to the lower end surface,
The hole includes a form in which a portion of the pin portion protruding from the housing through the notch is inserted so as to be able to move back and forth.

In the above embodiment, when the power cable meanders and presses the pole portion in a tilting direction, the pin portion is displaced so as to pass through the notch. As the pin portion is displaced, the pole portion comes out of the pin portion (details will be described later). As a result, the tilting of the pole portion is not hindered by the housing, and a large tilting angle can be ensured. For example, the pole section can be fully tipped. Therefore, in the above-described configuration, when the power cable is not meandering, the pole portion can be stably supported by the housing in an upright state, and when meandering occurs, the meandering of the power cable can be detected satisfactorily.

(3) A power cable meandering detection system according to an aspect of the present disclosure includes:
a plurality of conveyors arranged at predetermined intervals along a laying route to send out power cables along the laying route;
a control unit that controls the operation of the conveying machine;
a power cable meandering detection device according to (1) or (2) arranged between the conveyors;
and the receiving unit,
The control unit
A stop control section is provided for stopping driving of all the conveying machines when the receiving section receives the signal.

The power cable meandering detection system of the present disclosure can prevent the power cable from significantly meandering. The power cable meandering detection system of the present disclosure is used when laying a long and heavy power cable in an existing tunnel or the like, as described above. It is possible to prevent contact with the stored items and the inner wall.

(4) As an example of the power cable meandering detection system of the present disclosure,
comprising a plurality of meandering detection devices arranged at predetermined intervals along the installation route;
The control unit further comprises a corrective control unit,
The correction control unit
After the stop command from the stop control unit, among the plurality of conveying machines, only the conveying machine arranged on the front side in the traveling direction of the power cable from the meandering detection device that issued the signal is driven. morphology.

In the above embodiment, by driving only some of the conveying machines and stopping the rest of the conveying machines, meandering of the power cable can be automatically corrected. Therefore, the above configuration can reduce the burden on the operator and is excellent in workability when correcting meandering.

(5) A power cable laying method according to an aspect of the present disclosure includes:
A method for laying a power cable in which a plurality of conveyors are arranged on an installation route at predetermined intervals and the power cable is conveyed by the plurality of conveyors,
a first step of performing at least one of mechanically and optically detecting meandering of the power cable between the conveyors;
a second step of stopping driving of all the conveying machines when meandering of the power cable is detected;
and a third step of correcting meandering of the power cable.

The power cable laying method of the present disclosure can prevent the power cable from significantly meandering. The power cable laying method of the present disclosure is implemented when laying a long and heavy power cable in an existing tunnel or the like as described above. It is possible to prevent contact between stored items and the inner wall.

[Details of the embodiment of the present disclosure]
Hereinafter, embodiments of the present disclosure will be specifically described with reference to the drawings. The same reference numerals in the drawings indicate the same names.

[Embodiment]
(Laying method of power cable)
First, a power cable laying method according to the embodiment will be described with reference to FIG. 4 as appropriate.
In addition, in FIG. 4, the front side of the advancing direction of the power cable 9 is made into the paper surface right side.
<overview>
The power cable laying method of the embodiment (hereinafter sometimes referred to as the present laying method) is performed when laying a long and heavy power cable 9 along a predetermined route. In particular, when laying a long and heavy power cable 9, as shown in FIG. A power cable 9 is transported by the transporter 3 . The power cables 9 are sent out sequentially forward in the traveling direction due to the frictional force with the conveyors 3, and travel along the laying route.

Depending on the slope of the laying path, the bending angle in the horizontal direction, and the like, the conveying speed of each conveying machine 3 may differ as described above. Due to the difference in conveying speed, the advancing speed of the power cable 9 may not be constant over the entire length, resulting in relatively slow portions and relatively fast portions. When the above-described difference in traveling speed is large, the power cable 9 is more likely to meander at a location located behind the traveling direction of the power cable 9 than at the relatively slow location. Also, in the power cable 9, meandering is likely to occur at a portion (hereinafter referred to as a free portion 90) that is not supported by the conveying machine 3 or the driven roller 4 described later.

This laying method includes the following first step, second step, and third step, so that when laying using a plurality of conveying machines 3, the power cable 9 is largely meandering. to prevent
(First step) At least one of mechanical detection and optical detection of meandering of the power cable 9 is performed between the conveyors 3 .
(Second step) When the meandering of the power cable 9 is detected, the driving of all the conveying machines 3 is stopped.
(Third step) Meandering of the power cable 9 is corrected.

Here, an allowable range is set in advance with respect to the amount of horizontal displacement and the amount of vertical displacement of the power cable 9 traveling during installation. A displacement of the power cable 9 within this range is regarded as a normal displacement range. The "meandering of the power cable 9" to be detected here is displacement of the power cable 9 exceeding the normal range.

First, the power cable 9 to be laid, the carrier 3 used for laying, and the driven roller 4 will be briefly described below. Next, each step will be explained.

(power cable)
The power cable 9 typically includes a conductor, an insulating layer, and a sheath in order from the inside (details are not shown). The power cable 9 may have a semi-conductive layer on at least one of the inside and outside of the insulating layer. Moreover, the power cable 9 may be provided with a shielding layer on the outer periphery of the insulating layer. The constituent material of the conductor is typically copper, a copper-based alloy, or the like.

The length of the power cable 9 is, for example, 100 m or longer, 200 m or longer, 300 m or longer, or 500 m or longer, depending on the length of the installation route. Depending on the installation route, the length of the power cable 9 may be 1000 m or longer. Typically, the power cable 9 is wound on a drum (not shown), transported to the installation site, and unwound from the drum during installation.

The cable weight of the power cable 9, here, the mass (kg/m) per 1 m of length, depends on the cross-sectional area of the conductor and the like, but is, for example, several kg/m to about 50 kg/m.

(Carrier machine)
The carrier 3 is a device that is arranged at predetermined intervals along the laying route and sends out the power cable 9 along the laying route. As the carrier 3, any appropriate device capable of running the power cable 9 can be used. For example, the conveying machine 3 may be a device that includes a drive source and a main body with which the power cable 9 contacts, and that advances the power cable 9 by friction between the main body and the power cable 9 . Such devices include, for example, motorized rollers (this example), ball rollers, caterpillars, and the like.

The motor roller includes a roller portion as the main body portion, and a motor for rotating the roller portion as the drive source (details are not shown). The operation of each conveying machine 3 is typically controlled by the controller 5 . The control unit 5 controls the operation of the motor roller based on preset conditions (eg, rotational speed). Also, the control unit 5 issues an operation command (signal) to each carrier 3 via the transmission/reception unit 6 . Each carrier 3 includes a receiver 30 that receives an operation command from the transmitter/receiver 6, and a control circuit (not shown). The control circuit stops the rotation of the roller portion and adjusts the rotation speed based on the operation command. The transmitting/receiving section 6 and the receiving section 30 may be of a wireless type or of a wired type.

The motorized roller may include a pair of guide poles (not shown). Each guide pole is erected in a direction perpendicular to the axial direction of the rotating shaft at each end of the rotating shaft of the roller portion. Both guide poles are arranged to face each other so as to sandwich the power cable 9 traveling on the roller portion. The interval (horizontal distance) between both guide poles and the height (vertical length) of each guide pole may be adjusted according to the normal displacement range described above. In this case, the horizontal and vertical displacements of the advancing power cable 9 are regulated by both guide poles. Both such guide poles contribute to the prevention of meandering.

The guide pole is, for example, a cylindrical member. In addition, the guide pole may have a cylindrical roller portion that can rotate about an axis extending in the vertical direction. The roller portion rotates due to contact with the advancing power cable 9 , thereby contributing to reducing contact resistance with the power cable 9 .

(driven roller)
The driven rollers 4 are arranged between the conveyors 3 to promote the advance of the power cable 9 . The driven roller 4 does not have a drive source such as a motor, and has a roller portion that rotates by contact with the advancing power cable 9 . The driven roller 4 may also comprise a pair of guide poles (not shown) as described above.

(pre-process)
When carrying out this laying method, the carrier 3 and optionally the driven roller 4 are arranged on the floor surface 80 of the tunnel 8 or the like. Typically, one or more driven rollers 4 are arranged between the conveyors 3 . FIG. 4 exemplifies a case where two driven rollers 4 are arranged between the conveyors 3 . The distance L ₃ between the adjacent conveying machines 3, the distance L ₃₄ between the adjacent conveying machines 3 and the driven rollers 4, and the distance L ₄ between the adjacent driven rollers 4 depend on the length of the installation route, the size of the power cable 9, and the like. can be selected as appropriate. The smaller the intervals L ₃ , L ₃₄ , and L ₄ are, the more conveyers 3 and driven rollers 4 support the power cable 9 . Therefore, the straightness of the power cable 9 is enhanced, and meandering is easily prevented. As the intervals L ₃ , L ₃₄ , and L ₄ are larger, the number of conveying machines 3 and driven rollers 4 may be smaller. Therefore, the installation time and the collection time are likely to be shortened. This reduces the burden on the operator. For example, the intervals L ₃₄ and L ₄ are about 1 m or more and 5 m or less. The interval _L3 may be about 1 to 5 times the interval _L34 or the interval _L4 .

<First step>
In this process, meandering of the power cable 9 may be detected using one or both of a mechanical detection device and an optical detection device. Each detection device is configured to detect as meandering when the above-described normal displacement range is exceeded.

The mechanical detection device includes, for example, a structure that detects meandering by direct contact with the meandering power cable 9 . A mechanical detection device has advantages such as a simple structure, little or no electric power energy required for detection, light weight, and the like. As an example of the mechanical detection device, there is a power cable meandering detection device 1 of an embodiment described later.

Examples of optical detection devices include those equipped with optical sensors such as cameras and infrared rays. A detection device having an optical sensor unit includes, for example, a structure that measures the position of the power cable 9 during travel and detects meandering based on the difference from the normal displacement range described above. The optical sensor section is not in contact with the meandering power cable 9 . Therefore, the optical detection device can prevent damage to the sensor section or the like due to contact with the power cable 9 .

A mechanical detection device or an optical detection device is arranged at least one location selected from the group consisting of between the conveyors 3, between the conveyor 3 and the driven rollers 4, and between the driven rollers 4. is mentioned. Also, one or a plurality of the sensing devices may be arranged at the at least one location. Although the detection devices may be arranged only at predetermined locations in one laying route, it is preferable that the detection devices be arranged at predetermined intervals over the entire length of the laying route. This is because meandering of the power cable 9 can be quickly detected at any point of the power cable 9, and large meandering can be easily prevented. The interval between adjacent detectors may be approximately the same as the interval _L3 or the interval _L4 , for example.

<Second step>
In this process, the operation of each transfer machine 3 may be controlled using the controller 5 . The control unit 5 can use a computer. For example, the control unit 5 includes a processor that constitutes a computer. Further, the control unit 5 may be configured to be able to acquire the detection result from the detection device described above, for example. Further, for example, the control unit 5 may be configured to stop driving all the conveying machines 3 when the detection device detects meandering of the power cable 9 . An example of a configuration including such a control unit 5 is a power cable meandering detection system 2 of an embodiment described later.

<Third step>
In this process, it is preferable to correct the meandering of the power cable 9 by using the conveying machine 3 because the burden on the operator can be reduced. In this case, for example, the control unit 5 may be configured to drive some of the plurality of conveying machines 3 and keep the rest of the conveying machines 3 stopped. As an example of a configuration including the control unit 5 that performs such control, a power cable meandering detection system 2 of an embodiment, which will be described later, is used. After the meandering correction is completed, the control unit 5 drives the remaining conveying machine 3 . As a result, the power cable 9 is advanced again by all the carriers 3 .

<Main effect>
This installation method can quickly detect meandering of the power cable 9 by using mechanical means or optical means. Further, in this laying method, when the above meandering is detected, all the conveying machines 3 are stopped. Therefore, for example, even when the intervals L ₃ , L ₃₄ , and L ₄ described above are large to some extent and the free portion 90 is long to some extent, it is possible to prevent the meandering state from worsening, that is, the power cable 9 from significantly meandering. Furthermore, the present laying method corrects the meandering after all the conveyors 3 have stopped. Therefore, the meandering is reliably corrected. Therefore, the present laying method is carried out when laying the power cable 9 in a laying route such as an existing tunnel 8 or the like in which there are items to be stored or an inner wall in the vicinity of the traveling power cable 9. The power cable 9 can be prevented from coming into contact with the stored items and the inner wall.

(Power cable meandering detection device and power cable meandering detection system)
When implementing the power cable installation method of the above-described embodiment, the power cable meandering detection device according to the embodiment and the power cable meandering detection system according to the embodiment can be preferably used. Hereinafter, a power cable meandering detection device 1 according to an embodiment and a power cable meandering detection system 2 according to an embodiment will be described with reference to FIGS. 1 to 4 as appropriate.

1 and 3, the lower side of the paper is the installation side (floor surface 80 side), and the vertical direction of the paper is the vertical direction.
1 and 3 show a state in which the meandering detector 1 is installed on the floor surface 80 of the installation route such as a tunnel 8 or the like.
1 and 3 show a region on the lower end side of the pole portion 11 and a region of the housing 130 on the side of the pole portion 11 by notching.
FIG. 2 is a partial plan view showing a state in which the area on the side of the pole portion 11 in the housing 130 provided in the meandering detection device 1 is viewed from above in the axial direction of the pole portion 11 .

<Meandering detector>
"overview"
The power cable meandering detection device 1 of the embodiment is a device that is used when laying the power cable 9 along a predetermined installation route such as a tunnel 8 and mechanically detects meandering of the power cable 9 .

Specifically, the meandering detection device 1 includes a pair of pole portions 11 and 12, a base portion 13, a switch portion 14, and a transmission portion 15, as shown in FIG. The pole portions 11 and 12 are spaced apart in a direction that intersects the traveling direction of the power cable 9, here, in a direction that is perpendicular to the traveling direction (in FIG. 1, the left-right direction of the paper surface). The pedestal portion 13 supports at least one of the pole portions 11 and 12 so as to be displaceable from an upright state to a tilted state. The switch portion 14 operates as the pole portion 11 or 12 tilts. The transmitter 15 sends a signal (tilt signal) indicating tilting of the pole portion 11 or 12 to the transmitter/receiver 6 (FIG. 4) in response to the operation of the switch portion 14 .

"overall structure"
The meandering detection device 1 of this example has a portal shape including a pair of pole portions 11 and 12 and a pedestal portion 13 arranged so as to connect the lower ends of the pole portions 11 and 12 . The pedestal portion 13 is installed on the floor surface 80 . The pole portions 11 and 12 are erected at respective ends of the pedestal portion 13 with an interval _L1 therebetween. During laying, the power cable 9 runs between the pole portions 11 and 12 . For example, when the traveling power cable 9 meanders in the horizontal direction to the extent that it contacts the pole portion 11, the pole portion 11 falls to the right side of the paper surface of FIG. 3 centering on the lower end side as shown in FIG. When the meandering power cable 9 contacts the pole portion 12, the pole portion 12 falls to the left side of the paper surface of FIG. In this example, the structure related to the pole portion 11 and the structure related to the pole portion 12 are the same except that the tilting direction is reversed left to right. Therefore, below, the pole portion 11 will be described as a representative example.

《Pole section》
The pole portion 11 is a member that functions as a sensor with which the meandering power cable 9 contacts. The pole portion 11 of this example is a cylindrical member. Therefore, even if the advancing power cable 9 comes into contact with the pole part 11, the pole part 11 is unlikely to damage the power cable 9. - 特許庁From the viewpoint of preventing damage to the power cable 9, the cross-sectional shape of the pole portion 11 preferably has no corners. The cross-sectional shape of the pole portion 11 may be a circular shape or a curved shape such as an ellipse.

The pole portion 11 of this example includes a hollow cylindrical body portion 110 , a base portion 111 and a cap portion 115 . The base portion 111 is provided on the lower end side of the main body portion 110 and closes the opening on the lower side of the main body portion 110 . The cap portion 115 is provided on the upper end side of the body portion 110 and closes the upper opening of the body portion 110 .

Since the body portion 110 is a hollow body, the pole portion 11 is lightweight. As a result, the meandering detection device 1 is lightweight. In this respect, the burden on the operator is reduced when installing or collecting the meandering detector 1 . The base portion 111 and the cap portion 115 cover the edge of the end portion of the body portion 110 to prevent the power cable 9 in contact with the body portion 110 from being damaged. Note that the cap portion 115 may be omitted. Alternatively, for example, the body portion 110 and the base portion 111 may be integrally molded.

The base portion 111 of this example is a thick cylindrical body having a hole 112 opening to the lower end surface 11 d of the pole portion 11 . In this example, the central axis of hole 112 is coaxial with body portion 110 and base portion 111 . A portion of a pin portion 132, which will be described later, is inserted into the hole 112 so as to be able to move forward and backward. The hole 112 in this example penetrates from the lower end surface 11d of the base portion 111 toward the upper end surface, but may be a blind hole. The forward/backward movement of the pin portion 132 will be described later.

The hole 112 of this example is a circular hole having an inner diameter slightly larger than the outer diameter of the round bar-shaped pin portion 132 and longer than the length of the pin portion 132 . The shape of the opening of the hole 112 , the size of the opening, the length, etc. can be appropriately changed according to the pin portion 132 . Since the inner diameter of the hole 112 is larger than the outer diameter of the pin portion 132, the hole 112 of the base portion 111 is easily removed from the pin portion 132 when the pole portion 11 falls down, as will be described later.

A constituent material of the pole portion 11 is, for example, a resin. The resin pole portion 11 has advantages such as excellent corrosion resistance, light weight, and resistance to damage to the power cable 9 even if the power cable 9 comes into contact with the pole portion 11 .

The height of the pole portion 11 (here, the length from the lower end surface 11 d of the base portion 111 to the upper end surface of the cap portion 115 ) is greater than the cable diameter of the power cable 9 . Also, the height may be adjusted according to the normal displacement range described above. The higher the height, the more difficult it is for the advancing power cable 9 to climb over the pole portion 11 . As a result, it may be easier to prevent the power cable 9 from significantly meandering. The lower the height, the lighter the pole portion 11 and the easier the installation and recovery of the meandering detection device 1 . Further, in a narrow tunnel 8 or the like, the space above the installed meandering detection device 1 tends to become large. Therefore, it is easy to secure a passage space for workers. As for the said height, about 10 cm or more and 100 cm or less are mentioned, for example.

The power cable 9 can come into direct contact with the body portion 110 . Therefore, it is preferable that the thickness of the main body part 110 is such that it does not bend even when the power cable 9 comes into contact with it.

The interval _L1 between the pole portions 11 and 12 may be larger than the cable diameter of the power cable 9 . Also, the interval _L1 may be adjusted according to the normal displacement range described above. If the interval _L1 is large to some extent, the meandering detection device 1 can be used for power cables 9 of various cable diameters, and is highly versatile. For example, the interval _L1 may be about 1.5 to 3 times the maximum cable diameter for which the meandering detector 1 is used. The spacing _L1 in FIGS. 1 and 3 is an example. Note that the interval _L1 is the distance between the centers of the pole portions 11 and 12 along the horizontal direction.

《Pedestal》
The pedestal portion 13 of this example includes a housing 130 , a hinge portion 131 and a pin portion 132 . The housing 130 supports the pole sections 11 and 12 in an upright state. The hinge portion 131 allows the pole portions 11 and 12 to tilt. The pin portion 132 of this example is tiltably supported by the hinge portion 131 .

≪Case≫
The housing 130 of this example has a surface (hereinafter referred to as a support surface 13f) that supports the lower end surfaces 11d and 12d of the pole portions 11 and 12, and has the function of supporting the pole portions 11 and 12 in an upright state. have. Further, the housing 130 of this example is a cylinder. The housing 130 accommodates the pin portion 132, the hinge portion 131, the switch portion 14, the transmission portion 15, etc., and functions as a protective case for these items.

The housing 130 of this example is a rectangular parallelepiped cylindrical body. Both ends of the housing 130 are open. The surface of the upper plate that constitutes the housing 130 is the support surface 13f described above. The horizontal length of the upper plate is longer than the distance _L1 mentioned above. Here, the horizontal length L ₁₃ (FIG. 2) of the upper plate is approximately equal to the sum of the distance L ₁ and the radius r of both pole portions 11 and 12 (L1+2×r). In addition, the housing 130 has a height and width that can accommodate the above-described storage items.

A notch 136 is provided in the upper plate of the housing 130 where the pole portions 11 and 12 are arranged, as shown in FIG. The notch 136 opens at the edge of the upper plate and also opens at the support surface 13f and its opposite surfaces (front and back surfaces of the upper plate). The pin portion 132 is inserted through the notch 136 . The notch 136 allows the pin portion 132 to tilt when the pole portion 11 tilts. Therefore, the notch 136 opens at a position that intersects the tilting trajectory of the pin portion 132 in the upper plate.

The notch 136 of this example is T-shaped in a plan view from the top and bottom direction, and includes a notch 13a forming a vertical bar portion of the T shape and a notch 13b forming a horizontal bar portion of the T shape. Therefore, the width of the notch 136 changes at the boundary between the notch 13a and the notch 13b. The notch 13 a is provided at a position away from the edge of the upper plate of the housing 130 . The notch 13a has a relatively elongated rectangular shape with respect to the notch 13b. The notch 13b is provided closer to the edge of the upper plate than the notch 13a and opens to the edge of the upper plate. The notch 13b has a relatively short and wide rectangular shape.

The length L ₁₃₆ of the cutout 136 and the width _Wb of the cutout 13b in this example are sizes substantially along the outer diameter (=2×radius r) of the base 111 . The length L _a and the width W _a of the notch 13 a are smaller than the outer diameter of the base 111 . The width W _a is slightly larger than the outer diameter of the pin portion 132 . The above lengths L _a and L ₁₃₆ are horizontal distances. The length _La is the distance from the closed end of the notch 13a to the open end of the notch 13a. The open end of the notch 13a is provided at an edge portion 137 forming a boundary between the notch 13a and the notch 13b. The edge 137 of this example is provided parallel to the edge of the upper plate of the housing 130 at the notch 136 . The widths W _a and W _b described above are the lengths in the direction perpendicular to the lengths L _a and L _b (vertical direction in FIG. 2 ).

In this example, the position of the pin portion 132 in the notch 136 is about 50% of the length L ₁₃₆ (here, the radius r of the base portion 111 is degree). Further, the edge portion 137 is positioned between the center of the pin portion 132 and the following specific location on the periphery of the lower end surface 11d of the base portion 111 when the pole portion 11 is in an upright state as in this example. is preferably provided in The specific portion is a portion of the peripheral edge of the lower end surface 11d that overlaps the tilt locus of the pin portion 132 when the pole portion 11 is upright. Further, as in this example, the distance L137 from the edge 137 of the notch 13b on the pole portion 11 side to the edge ₁₃₇ of the notch 13b on the pole portion 12 side is preferably shorter than the distance _L13 described above.

By providing the pin portion 132 and the notch 136 at the above-described positions, a region of the lower end surface 11d of the base portion 111 that intersects the tilt locus of the pin portion 132 mainly faces the notch 13a ( facing each other). In addition, of the lower end surface 11d of the base 111, a region arranged closer to the end edge side of the upper plate of the housing 130 than the edge 137 of the notch 136 (an arcuate region described below in FIG. 2) faces the notch 13b. are facing each other. The arcuate area is an area surrounded by the peripheral edge of the base portion 111 and the imaginary straight line extending from the edge portion 137 . Of the lower end face 11d of the base portion 111, the regions facing the cutouts 13a and 13b can be said to be regions not supported by the upper plate. A portion of the lower end surface 11d of the base portion 111 other than the above-described facing region is supported by the upper plate.

A constituent material of the housing 130 includes metal, resin, and the like. When the meandering detection device 1 is installed on the floor surface 80, the housing 130 may receive a load from the power cable 9 or may be stepped on by an operator. If the constituent material is metal, the housing 130 is excellent in strength, which is preferable. Examples of the metal include those having excellent strength and corrosion resistance, such as stainless steel. If the constituent material is resin, the housing 130 is excellent in corrosion resistance and lightweight. Further, the above resin is preferably, for example, a fiber-reinforced resin or the like because of its excellent strength.

≪Hinges≫
The hinge portion 131 has a first hinge piece, a second hinge piece, and a shaft portion that rotatably connects the two hinge pieces. In this example, the pin portion 132 is fixed inside the first hinge piece of the hinge portion 131 (on the right side of the paper surface in FIG. 1). The pin portion 132 may be fixed to the outside of the first hinge piece as long as the switch portion 14 can be pressed.

The hinge portion 131 is a member that allows the body portion 110 and the base portion 111 of the pole portion 11 to rotate within a predetermined angle range around the shaft portion. In this example, the second hinge piece of the hinge portion 131 is fixed to the inner bottom surface of the housing 130 so that the two hinge pieces form a right angle when the pole portion 11 is in an upright state. When the hinge portion 131 is closed so that the second hinge piece approaches the first hinge piece, the pole portion 11 is tilted rightward through the pin portion 132 inserted into the base portion 111 . When the second hinge piece is separated from the first hinge piece and the hinge portion 131 is opened, the pole portion 11 fallen to the right side returns to the upright state.

Note that the rotation mechanism of the pole portion 11 can be changed as appropriate. For example, instead of the hinge portion 131, the following configuration may be adopted (not shown). The pedestal portion 13 has a shaft portion that serves as the center of rotation of the pole portion 11 . The shaft portion is fixed to the housing 130 . An end portion of the pin portion 132 has a through hole through which the shaft portion is inserted. Also in this configuration, the lower end surface 11d of the pole portion 11 is placed on the support surface 13f of the upper plate of the pedestal portion 13, so that the pole portion 11 can be stably maintained in an upright state.

≪Pin section≫
The pin portion 132 is a member inserted into the hole 112 of the base portion 111 of the pole portion 11 . The pin portion 132 is arranged along the axial direction of the pole portion 11 . In this example, the region on the lower end side of the pin portion 132 is a fixed portion to the hinge portion 131 . A region on the upper end side of the pin portion 132 is a portion that protrudes from the support surface 13 f of the housing 130 through the notch 136 of the housing 130 . A region above the pin portion 132 is inserted into the hole 112 so as to be able to move forward and backward.

The pin portion 132 of this example is a rod-shaped member as described above, and can be smoothly advanced and retracted with respect to the hole 112 . Further, in this example, the region on the tip end side of the pin portion 132 is tapered toward the tip face 13e. Therefore, the pin portion 132 can be easily inserted into the hole 112 .

In this example, the length of the pin portion 132 is the length to be supported by the base portion 111 when the pole portion 11 is tilted and the pin portion 132 is removed from the hole 112 . That is, as shown in FIG. 3, even if the pole portion 11 is tilted to the right to some extent, the state in which the pin portion 132 is partially inserted into the hole 112 of the base portion 111 is maintained. In this example, even when the pole portion 11 is completely overturned (overturned sideways), the pin portion 132 remains partially inserted into the hole 112 .

The constituent material of the hinge portion 131 and the pin portion 132 is, for example, metal. For the pin portion 132, for example, a bar made of metal having excellent strength such as stainless steel can be used. For example, the pin portion 132 may be joined to the hinge portion 131 by welding or the like.

<<Press part>>
The meandering detection device 1 of this example includes a pressing portion 134 fixed to the outside of the first hinge piece (the left side of the paper surface in FIG. 1). The pressing portion 134 is a member that directly presses the contact portion 140 of the switch portion 14 . The pressing portion 134 may be made of metal, for example. In addition, the pressing portion 134 may have a size corresponding to the contact portion 140 so that it can be reliably pressed. The pressing portion 134 of this example has a rectangular shape when viewed from the axial direction of the hinge portion 131, and the corners of the surface of the pressing portion 134 that contacts the switch portion 14 and the lower surface are chamfered. Therefore, when the pole portion 11 is returned from the tilted state to the upright state, the chamfered portion is directed downward from above. Therefore, the pressing portion 134 easily comes into contact with the switch portion 14 positioned below, and easily presses the switch portion 14 smoothly.

《Switch part》
Various structures can be used for the switch section 14 . The switch unit 14 of this example is a commercially available pin plunger type limit switch. The switch section 14 is opened and closed by advancing and retracting a pin plunger (not shown). The contact part 140 is connected to the tip of the pin plunger. In this example, when the pole portion 11 is in an upright state, the pressing portion 134 presses the contact portion 140 to push the pin plunger. In this state, the switch section 14 is not operated (open state). When the pole portion 11 tilts to the right and the pressing portion 134 separates from the contact portion 140, the pushing of the pin plunger is released. In this state, the switch section 14 is activated (closed). The position of the switch portion 14 and the position of the pressing portion 134 are adjusted so that the switch portion 14 opens and closes as described above. Here, the actuation of the switch portion 14 means that the pole portion 11 has tilted to the right side, that is, the power cable 9 has meandered. Further, when the switch portion 14 is not operated, it can be said that the power cable 9 is traveling within the normal displacement range described above.

An electric wire is connected to the switch section 14 . The switch section 14 is electrically connected to the transmission section 15 via this wire.

《Transmitter》
The transmitting section 15 is a member that transmits the tilting signal described above to the receiving section (the transmitting/receiving section 6 in this example) when the switch section 14 is actuated.

As the transmission unit 15 , various units capable of transmitting electric signals to the transmission/reception unit 6 can be used wirelessly or by wire.

Note that, in this example, the power source 16 of the transmission unit 15 is also housed in the housing 130 . Power consumption can be reduced by configuring the transmitting unit 15 to transmit a signal to the transmitting/receiving unit 6 only when receiving the tilt signal described above.

《Meandering detection operation》
Next, when the power cable 9 meanders beyond the above-described normal displacement range, the operation of the meandering detector 1 to detect meandering of the power cable 9 will be described.

<Normal>
When the power cable 9 is traveling within the above normal displacement range, both the pole portions 11 and 12 are supported in an upright state with respect to the housing 130 as shown in FIG. In this example, the lower end surfaces 11 d and 12 d of both the pole portions 11 and 12 are stably supported by the upper plate of the housing 130 because there are not too many portions facing the notch 136 . The pin portion 132 is inserted through the notch 136 of the housing 130 and into the hole 112 of the base portion 111 . The upper plate prevents the lower end faces 11d and 12d from falling below the upper plate with the pin portion 132 as a guide.

≪When meandering≫
When the power cable 9 meanders beyond the normal displacement range, for example, as shown in FIG.

Specifically, when the pole portion 11 falls to the right, the portion of the lower end surface 11d of the pole portion 11 that faces the notch 13b contacts the edge portion 137 (FIG. 2) of the notch 136 described above. As the pole portion 11 tilts, the portion of the lower end surface 11 d that contacts the edge portion 137 shifts from the outer peripheral side of the pole portion 11 toward the center side. As a result, the length of the region of the pin portion 132 protruding from the hole 112 is increased. That is, the pole portion 11 is removed from the pin portion 132 .

As the pole portion 11 tilts, the contact portion 140 of the switch portion 14 is released from being pushed by the pressing portion 134 . Therefore, the switch section 14 is closed. By operating the switch section 14 , the transmission section 15 transmits a tilt signal to the transmission/reception section 6 .

The fallen pole portion 11 can be restored to an upright state by rotating it to the left, contrary to the above-described rotation to the right. The contact portion 140 of the switch portion 14 is pushed into the pressing portion 134 by the pole portion 11 being in an upright state. Therefore, the switch part 14 will be in an open state. Transmitting section 15 typically stops transmitting to transmitting/receiving section 6 .

<Meandering detection system>
As an example of use of the power cable meandering detection device 1 of the embodiment, construction of a power cable meandering detection system 2 of the following embodiment can be mentioned. The power cable meandering detection system 2 of the embodiment includes a meandering detector 1, and when the meandering detector 1 detects meandering of the power cable 9, the conveyor 3 is used to correct the meandering of the power cable 9. .

Specifically, as shown in FIG. 4, the meandering detection system 2 includes a plurality of conveying machines 3, a controller 5, at least one meandering detector 1, and a receiver. The conveyors 3 are arranged at predetermined intervals on the laying path. The meandering detection device 1 is arranged between the conveyors 3 . A control unit 5 that controls the operation of the carrier 3 includes a stop control unit 51 . The stop control unit 51 stops driving all the conveying machines 3 when the receiving unit receives a signal (tilting signal) indicating the tilting of the pole unit 11 from the transmitting unit 15 .

《Meandering detector》
The meandering detection system 2 preferably includes a plurality of meandering detectors 1 arranged at predetermined intervals along the installation route. This is because meandering of the power cable 9 can be quickly detected at any point of the power cable 9, and large meandering can be easily prevented. FIG. 4 illustrates a case where the meandering detector 1 is arranged between the adjacent conveying machine 3 and the driven roller 4 and between the adjacent driven rollers 4, respectively. In this case, the interval between adjacent meandering detection devices 1 is, for example, approximately the same as the above-described interval _L34 or interval _L4 . As in the present example, a form having sections in which the conveying machine 3 or the driven roller 4 and the meandering detection device 1 are alternately arranged can more reliably detect meandering.

《Receiving part》
The receiver in this example is the transmitter/receiver 6 described above. In addition, the meandering detection system 2 may include a receiving unit and a transmitting unit independently, and each of them may be connected to the control unit 5 .

《Control part》
The control unit 5 of this example includes a stop control unit 51 in addition to controlling the normal operation of the conveying machine 3 as described above. When the controller 5 receives the tilt signal from the meandering detector 1 via the transmitter/receiver 6 , the stop controller 51 sends a drive stop command to the conveyor 3 via the transmitter/receiver 6 . Upon receiving the stop command (signal), the conveying machine 3 can quickly stop driving.

Furthermore, the control unit 5 of this example includes a correction control unit 52 described below. After receiving a stop command from the stop control unit 51, the correction control unit 52 is arranged on the front side in the traveling direction of the power cable 9 from the meandering detection device 1 that has issued the above-described tilting signal among the plurality of conveying machines 3. Only the conveying machine 3 (hereinafter referred to as the front conveying machine group) is driven. Of the plurality of conveyors 3, the conveyors 3 (hereinafter referred to as a group of conveyors on the rear side) that are arranged on the rear side in the traveling direction of the power cable 9 from the meandering detection device 1 that issued the tilting signal are , is not driven and remains stationary. If only the front group of conveyors is driven while the rear group of conveyors is stopped, only the meandering portion of the power cable 9 is advanced by the front group of conveyors. As a result, meandering of the power cable 9 is automatically corrected.

The control of the group of conveyors on the front side by the corrective control unit 52 is performed according to, for example, the gradient of the location where meandering occurs in the laying route, the bending angle in the horizontal direction, the number of conveyors 3 constituting the group of conveyors on the front side, and the like. , setting the operating conditions of the group of conveying machines on the front side. For example, the operator visually confirms the meandering state and sets the operating conditions. Alternatively, the control unit 5 may be configured to automatically set the operating conditions. Alternatively, for example, the control of the group of conveying machines on the front side may be performed by setting the time for driving the group of conveying machines on the front side according to the meandering length. In this case, the corrective control unit 52 drives the transport machine group on the front side for a set time under predetermined operating conditions.

Further, the correction control unit 52 may be configured to stop driving all the conveying machines 3 when the meandering is corrected. In this case, for example, the operator can secure time for visually confirming correction of meandering. Therefore, the certainty that meandering has been eliminated is enhanced.

Furthermore, the control unit 5 of this example includes a re-drive control unit 53 described below. The re-drive control unit 53 drives the group of conveying machines on the rear side after the meandering by the group of conveying machines on the front side is corrected. In this case, after the correction of the meandering is completed, the transport machine group on the rear side is driven. Therefore, the power cable 9 can be transported in a state in which meandering has been reliably eliminated, and the recurrence of meandering can be easily prevented. When the correction control unit 52 stops driving all the conveying machines 3 as described above, the re-drive control unit 53 restarts driving all the conveying machines 3 .

If the laying route is long, one controller 5 may control a plurality of transporters 3 and meandering detectors 1, or one or more repeaters (not shown) may be provided. In this case, the control unit 5 causes signals to be transmitted and received with each repeater. Each repeater transmits and receives signals to and from a predetermined number of carrier machines 3 and a predetermined number of meandering detectors 1 . The number of conveying machines 3 and the number of meandering detection devices 1 corresponding to each repeater may be appropriately selected in consideration of the wireless distance, the workability of wired connection, and the like.

<Main effect>
The power cable meandering detector 1 of the embodiment detects meandering of the power cable 9 exceeding the normal displacement range as tilting of the pole portions 11 and 12 . The detection result (the tilting signal described above) is transmitted to the control unit 5 via the transmission unit 15 and the transmission/reception unit 6, and the control unit 5 stops driving all the conveying machines 3. FIG. Therefore, by detecting meandering with the meandering detector 1, the power cable 9 is prevented from significantly meandering. Such a meandering detection device 1 is used when laying the power cable 9 in a laying route such as an existing tunnel 8 or the like where there are items to be stored or an inner wall in the vicinity of the traveling power cable 9. , and contributes to avoiding contact between the power cable 9 and the above-mentioned stored items or inner wall.

The meandering detection device 1 of this example utilizes the fact that the meandering power cable 9 presses the pole portion 11 or 12 and falls down, and operates the switch portion 14 to send the tilting signal to the control portion 5 side. This is a simple configuration. Therefore, the meandering detector 1 is also excellent in manufacturability.

Furthermore, the meandering detector 1 of this example also has the following effects.
(1) Both the pole portions 11 and 12 are tiltable. Therefore, meandering of the power cable 9 can be detected more reliably.
(2) The housing 130 keeps the poles 11 and 12 upright.
(3) Pole portions 11 and 12 are moved from an upright state to a tilted state by notch 136 of housing 130, hole 112 of base portion 111 of pole portion 11 and 12, and pin portion 132 inserted into hole 112 so as to be able to advance and retreat. can be easily displaced to

In the power cable meandering detection system 2 of the embodiment, when the meandering detector 1 detects the meandering of the power cable 9, the stop control unit 51 stops driving all the conveying machines 3. Therefore, the power cable 9 is large. Meandering can be prevented. Such a meandering detection system 2 is used when laying the power cable 9 in a laying route, such as an existing tunnel 8 or the like, in which stored items or inner walls exist close to the traveling power cable 9. , contact between the power cable 9 and the above-mentioned stored items or inner wall can be avoided.

The meandering detection system 2 of this example includes a correction control unit 52 and can automatically correct meandering. Such meandering detection system 2 can reduce the burden on the operator and is excellent in workability when correcting meandering.

The present invention is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the meaning and scope of equivalents of the scope of the claims.
For example, at least one of the following modifications can be made to the embodiments described above.

(Modification 1) In the meandering detection device, the pedestal has a configuration that allows the tilted pole portion to automatically return to an upright state.
For example, the pedestal may include a hinge having a torsion spring as the hinge described above. Alternatively, for example, the pedestal may include an elastic member such as a torsion spring and a shaft serving as the rotation center of the pole instead of the hinge. In this case, the end portion of the pin portion may include, for example, a through-hole through which the shaft portion is inserted, and a segment with which one end portion of the torsion spring abuts. The other end of the torsion spring may be fixed to the housing of the pedestal. If a torsion spring is provided, the torsion spring can be adjusted so that the spring arm does not substantially close under the weight of the pole, and the spring arm closes when the load from the tortuous power cable is applied. mentioned. That is, the pole portion is always urged in the upright direction by the torsion spring.

When an elastic member such as a torsion spring is provided, the lower end surface of the pole portion may be placed on the support surface of the upper plate of the pedestal portion as in the above-described embodiments. Alternatively, depending on the biasing force of the elastic member, the lower end surface of the pole portion may not be supported by the upper plate of the pedestal portion.

When the power cable meanders, the pole portion is pressed by the power cable, and is maintained in a tilted state against the biasing force of the elastic member. When the meandering is corrected, the pole portion is released from the above-described pressing force, so that the pole portion can be restored to an upright state by the biasing force of the elastic member. Modification 1 does not require the operator to return the pole portion to the upright state. Therefore, the burden on the worker is reduced.

(Modification 2) A meandering detection system includes both a meandering detector 1 that mechanically detects meandering of a power cable and an optical detector (not shown).

(Modification 3) The meandering detection system further includes an alarm unit (not shown). The control unit includes an alarm control unit (not shown) that drives the alarm unit when receiving a signal indicating tilting of the pole unit.
Examples of the alarm unit include a lamp, a member that visually prompts a warning such as a monitor capable of displaying a warning message, a member that prompts an auditory warning such as a buzzer, and the like. By providing the alarm unit, the operator can easily recognize that the power cable has meandered.

(Modification 4) A meandering detection system or installation method arranges at least one of a mechanical detection device and an optical detection device only in a predetermined section of the installation route instead of the entire length.
Depending on the laying route, there may be places where the above-described differences in transport speed are likely to occur (eg, places with steep slopes, places with sharp bends, etc.). If the above-described detection device is arranged only at such a specific location, the installation time and recovery time of the detection device are likely to be shortened. In addition, by arranging a monitoring worker in a predetermined section such as the position where the detection device is arranged, the burden on the operator can be reduced.

1 meandering detection device 11, 12 pole portion 13 pedestal portion 14 switch portion 15 transmission portion 16 power supply 11d, 12d lower end surface 110 body portion 111 base portion 112 hole 115 cap portion 130 housing 131 hinge portion 132 pin portion 134 pressing portion 136 cutout 137 edge portion 13a, 13b cutout 13e tip surface 13f support surface 140 contact portion 2 meandering detection system 3 conveying machine 30 receiving portion 4 driven roller 5 control portion 51 stop control portion , 52 correction control unit, 53 re-driving control unit 6 transmission/reception unit 8 tunnel, 80 floor, 9 power cable, 90 free location

Claims (4)

a pair of poles spaced apart;
a pedestal for tiltably supporting at least one of the poles;
a switch section that operates in accordance with the tilting of the pole section;
a transmitting unit that transmits a signal indicating the tilting of the pole unit to a receiving unit in accordance with the operation of the switch unit;
Power cable meandering detector. The pedestal is
a housing having a surface for supporting the lower end surface of the pole portion;
and a pin portion that is tiltably supported,
The housing is
A notch that opens at a position that intersects the tilting trajectory of the pin portion,
The pole portion has a hole opening to the lower end surface,
2. The power cable meandering detection device according to claim 1, wherein a portion of said pin portion protruding from said housing through said notch is inserted into said hole so as to be able to move back and forth. a plurality of conveyors arranged at predetermined intervals along a laying route to send out power cables along the laying route;
a control unit that controls the operation of the conveying machine;
A power cable meandering detection device according to claim 1 or claim 2, which is arranged between the conveyors;
and the receiving unit,
The control unit
A stop control unit for stopping driving of all the conveying machines when the receiving unit receives the signal,
Meandering detection system for power cables. comprising a plurality of meandering detection devices arranged at predetermined intervals along the installation route;
The control unit further comprises a corrective control unit,
The correction control unit
After the stop command from the stop control unit, among the plurality of conveying machines, only the conveying machine arranged on the front side in the traveling direction of the power cable from the meandering detection device that issued the signal is driven. The power cable meandering detection system according to claim 3 .

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