JPH0635307B2 - Cable storage method - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a cable storage device, and more particularly to a cable storage device used in a narrow space such as a reactor inspection system.

[Technical background of the invention and its problems] A cable that supplies electric power or signals to mobile equipment such as an inspection vehicle for inspecting the inside of a nuclear reactor needs to be sent or pulled back as the equipment moves, so the cable must be removed. A so-called storage line device is used for storing once.

As such a cable storage device, a drum winding system, a curtain rail system, etc. are known, but the former requires a slip ring, and when the cables are wound, the cables are piled up and heat dissipation becomes worse. Since the latter has the drawbacks such as the sagging portion of the cable being caught and the adjustment of the feeding amount of the cable being impossible, the use of the figure-8 storage cable device is being considered. This figure-eight type storage device utilizes the property that when the cables are piled up by natural fall while reciprocating the cable feeding device on a straight line, the cables are piled up in a figure eight shape. The cable can be smoothly stored in and pulled out from the cable storage portion having a shape similar to the above.

The length and width of this storage line device is determined by the size and flexibility of the cable, and it can be stored without problems when used in a sufficiently wide space, but the space is narrow, such as in the reactor vessel inspection system. When used for a cable with a large number of cores, the size of the cable storage part cannot be secured, so the figure 8 collapses during repeated storage.
There was a problem that the cable jumped out of the cable storage part or was kinked.

In order to solve such a problem, a set of traversers that reciprocate in the length direction and the width direction of the cable storage section are provided above the cable storage section, and these traverses are reciprocated so as to draw a trajectory approximate to a figure eight shape. It has been considered to guide the cable into the cable storage part by moving it, but when the traverser is reversed, a large impact is repeatedly applied to the conduction mechanism by the inertia of the drive device of the traverser, which shortens the life of the device. There was a problem.

[Object of the Invention] The present invention has been made to solve such problems,
(EN) Provided is a cable storage device which can store an 8-shaped cable even in a narrow place or a cable having poor flexibility, and which alleviates the impact when the traverser reverses. With the goal.

[Summary of the Invention] That is, the cable storage device of the present invention includes an outer frame having a shape of a figure 8 in which a communication opening is formed at a connecting portion of circular arcs, and a conical body erected concentrically in each circular arc of the outer frame. Above the cable storage portion, a cable storage portion formed by a frame-shaped inner frame, a first traverser above the cable storage portion and reciprocating in the length direction of the cable storage portion to guide the cable. A second traverser that reciprocates in the width direction to guide the cable, a drive device that reciprocates these traversers, and a cable feeder that can feed the traverser in the forward and reverse directions. In the cable storage device mainly composed of, the reversal period of the first traverser is set to be twice as long as the reversal period of the second traverser, and each traverser has a predetermined stop at each reversing position. It is characterized by comprising a control device for controlling the drive device of each traverser so that the cable is guided along the outline of the outer frame while performing the operation.

Embodiments of the Invention Next, the method of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the outline of an apparatus used in the method of the present invention.

The cable storage device according to this embodiment includes a cable storage portion 2 fixed to the base 1 and having a shape similar to a figure 8, and above the cable storage portion 2 and extending in the length and width directions of the cable storage portion. A first traverser 3 that reciprocates to guide the cable guide G to the cable housing portion 2 in the shape of a figure 8, and a second traverser 4 that reciprocates in the width direction orthogonal to the first traverser 3. , A motor 5 for reciprocating the first traverser 3 in the length direction of the cable storage portion, and a second traverser 4
A motor 6 that reciprocates in the width direction of the cable storage portion,
A cable feeding device 7 capable of feeding the cable in the forward and reverse directions with respect to the cable guide G, and a cable tension measuring device 8 for controlling the amount of cable feeding of the cable feeding device 7,
The main parts of the traverser 3 are composed of optical sensors P _{0 to} P ₆ for measuring the position of the cable housing portion in the length direction and a potentiometer 9 for measuring the position of the traverser 4 in the width direction.

The cable housing portion 2 has an 8-shaped outer frame 2b having a communication opening 2a formed at a position corresponding to the junction of the arcs, and a conical shape concentrically provided in each arc of the outer frame 2b. Inner frame 2
The cables are stacked and housed in an 8-shaped space formed between the two frames 2b, 2c. In this embodiment, both the outer frame 2b and the inner frame 2c are made of iron pipes, and when the cables are stored, these iron pipes, especially the iron pipes constituting the inner frame 2c guide the cables to form a figure-8 shape. It acts to deposit in an orderly manner. Although the outer frame 2b and the inner frame 2c are made of iron pipes in this embodiment, they may be made of iron plate, plastic plate or the like if necessary.

The traverser 4 is slidably mounted on a guide rod 13 provided on the bearing portion 3a and the gear portion 4a and provided in the width direction of the cable storage portion. The bearing portion 3a is provided in the length direction of the cable storage portion. It is engaged with the screw shaft 3b, and the gear portion 4
a is fixed to a column (not shown) standing on the base 1, and is slidably mounted on a guide rod 14 provided in the length direction of the cable storage portion.

The motor 5 that reciprocates the traverser 3 in the length direction of the cable housing portion and the motor 6 that reciprocates in the width direction of the traverser 3 are supported by a support plate (not shown) fixed to the upper part of a column (not shown) that is erected at the end of the base 1. Is mounted on the motor 5
The above-mentioned screw shaft 3b is mounted on the shaft. When the motor 5 operates and the screw shaft 3b rotates, the bearing portion 3a and the gear portion 4
a reciprocates in the length direction of the cable storage portion, and the cable guide G reciprocates in the length direction of the cable storage portion. Motor 6
A screw shaft 4b is mounted in parallel with the guide rod 14, and the above-mentioned gear portion 4a is attached to the screw shaft 4b. A screw shaft 4c is mounted on the gear portion 4a parallel to the guide rod 13 and engaged with a gear in the gear portion 4a. When the motor 6 is actuated to rotate the screw shaft 4b, a screw shaft orthogonal to the screw shaft 4c is rotated. The shaft 4c also rotates, and the cable guide G reciprocates on the guide rod 13.

The cable feeder 7 holds the cable C and holds the motor 7a.
The cable feed direction can be switched between forward and reverse by a switch operation. Further, when stopped, the cable is elastically gripped by a spring or the like so that the cable is securely clamped and stopped. In the cable passage on the cable feeder 7, the base 1
A guide roll 15a supported by an upright column (not shown) is arranged, and a guide roll 15b is arranged behind it.

The cable tension measuring device 8 comprises a dancer roll 8a and a potentiometer 8c installed on the dancer roll via a tension bar 8b.
The tension of the cable can be measured by measuring the position of (1) with the potentiometer 8c.

Further, the optical sensors P _{0 to} P ₆ arranged along the length direction of the base 1 of the cable storage unit are adapted to detect the position of the traverser 4 in the length direction of the cable storage unit. The mounting positions of the optical sensors P _{0 to} P ₆ may be on the outer frame 2b of the cable storage portion.

The potentiometer 9 is a screw shaft 4 mounted on a motor 6.
It is arranged near b and measures the number of rotations of the screw shaft 4b to detect the position of the traverser 4, that is, the position of the cable guide G in the width direction of the cable housing portion.

Next, a method of using the device of the above embodiment as a cable storage device for a cable for mobile equipment will be described.

First, the cable towing vehicle M is retracted, the cable C is set on the cable feeding device 7 through the dancer roll 8a, the guide rolls 15b and 15a, and the cable feeding device 7 is driven to move the cable to the traverser 4 and then to the cable storage portion. Send in 2. The end portion of the cable C fed into the cable housing portion 2 is pulled out from between the pipes of the outer frame 2b of the cable housing portion 2 and used as a connection end to an external power source.

After that, while driving the cable feeding device 7, the motor 5,
When C6 is actuated to drive traversers 4 and 5, cable C begins to be deposited on the bottom of cable housing 2. At this time, the motors 5, 6, 7a, etc. are set in advance in association with a control device (not shown) as shown in the flowchart of FIG.

That is, the position of the dancer roll 8a is detected by the potentiometer 8c, and the motor 5,
6 and 7a are actuated to drive the cable feeding device 7 to adjust the amount of cable feeding and to move the traversers 3 and 4 in the length direction and width direction of the cable storage portion. , Set to be feedback controlled.

On the other hand, the optical sensors P _{0 to} P ₆ detect the position of the traverser 3 in the cable housing length direction, and the potentiometer 9 detects the position of the traverser 4 in the cable housing width direction, and the traversers 3, 4 reach the maximum path. At that time, the motor 5 or 6 is stopped for a predetermined time.

That is, as shown in FIG. 3, when the traverser 3 reaches the position detected by the optical sensor P ₁ or P ₆ , the motor 5
Is stopped and only the motor 6 is operated to move only the traverser ₃ between T _{1 and} T ₃ , whereupon the motor 5 is reversed.

On the other hand, when the potentiometer 9 detects that the position in the width direction of the cable storage portion of the traverser 4 has reached T ₂ or T ₄ , the motor 6 is stopped and only the motor 5 is operated to move the traverser 4 to P ₂ ~. The motor 6 is moved between P ₃ or P _{4 to} P ₅ , and the motor 6 is reversely rotated there.

The above operation is performed by a controller (not shown) based on the position detection signals from the photosensors P _{0 to} P ₆ and the potentiometer 9.

As is clear from the figure, the inversion period of the traversers 3 and 4 is set so that the inversion period of the traverser 3 is twice the inversion period of the traverser 4 with the point X ₀ as the middle point.

By reciprocally moving the traversers 3 and 4 in this way, the cable draws a locus more approximate to a figure 8 than when the traversers 3 and 4 are simply reciprocated. In the case where the cable is smoothly stored in 2 and the cable towing vehicle B moves forward, the cable feeding device 7 and the traversers 3 and 4 move in the opposite directions, and the cable is similarly sent out in the shape of 8. .

Further, the traversers 3 and 4 are reciprocated with a stop period always provided before reversing, so that the impact due to inertia at the time of reversing is reduced.

[Effects of the Invention] As described above, according to the device of the present invention, when the traversers in the length direction and the width direction of the cable storage portion are reversed, the drive device is temporarily stopped, so that the drive device can be installed in a narrow space. Even a hard cable can be stored smoothly,
Further, there is an advantage that the impact applied to the driving device at the time of reverse rotation of the traverser is alleviated and the device life is extended.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing an embodiment of the device of the present invention,
FIG. 2 is a block diagram for explaining the method of controlling the movement of the traverser in the device of the present invention, and FIG. 3 is a diagram showing the operation locus of the traverser. 1 ...... Base 2 ...... Cable storage part 3, 4 ...... Traverser 5, 6, 7a ...... Motor 7 ...... Cable feed device 8 ...... Cable tension measuring device 7 ...... Dancer roll 9 ...... Potentiometer P ₀ ~ P ₆ ... Optical sensor

Front page continuation (72) Inventor Nobuhiro Sasaki 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa, Showa Electric Wire & Cable Co., Ltd. (56) Reference JP-A-59-149712 (JP, A) JP-A-SHO 59-117412 (JP, A)

Claims (2)

[Claims] 1. A cable storage comprising an eight-shaped outer frame having a communication opening formed at a junction of arcs and a conical inner frame concentrically provided in each arc of the outer frame. And a first traverser above the cable housing to reciprocate in the length direction of the cable housing to guide the cable, and above the cable housing to reciprocate in the width direction. A cable storage device mainly composed of a second traverser for guiding a cable, a drive device for reciprocating these traversers, and a cable feeding device capable of feeding cables in the forward and reverse directions toward these traversers. In the above, the inversion period of the first traverser is set to be twice the inversion period of the second traverser, and each traverser performs a predetermined stop operation at each inversion position,
A cable storage device, comprising a control device that controls a drive device of each of the traversers so that a cable is guided along the contour of the outer frame. 2. A cable storage line according to claim 1, further comprising a detection device for detecting the position of each traverser, and the stopping operation of the one traverser at the reverse position is controlled by the position signal of the other traverser. apparatus.