JP2994790B2 - Striatal connection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of passing a wire such as an optical fiber through an optical fiber attachment pipe of a power cable or a single pipe.

[0002]

2. Description of the Related Art In recent years, an optical fiber (filament) has to be passed through a pipe for passing a wire, which has an excellent characteristic as compared with the conventional method using a pull cord. Also, there has been proposed a method of passing a striated body using a pushing force of a pinch roller. For example, FIG. 4 shows an example. In this method, a wire 2 and an air supply passage 3 through which the striated body L is passed are provided in the wire head 1, and a wire pipe 4 is connected to the outlet of the wire head 1. A pair of pinch rollers 6 and 6 are provided above and below the air leakage preventing portion 5 and the running line L on the inlet side of the line head 1,
With the driving of the pinch rollers 6, 6, compressed air is supplied from the outside to the air supply path 3, and the optical fiber L is passed from the inlet side of the wire head 1 to the outlet side into the wire pipe 4. Send out.

[0003]

However, in the case of this method, usually, the viscous force (propulsion force) by the air flow and the pushing force by the pinch rollers 6 and 6, for example, as shown in the linear body L in FIG. Although the vehicle travels forward in the pipe 4 for drawing a gentle curve or the like, if the insertion distance of the striated body L becomes a considerable length (several km or the like) due to some reason, for example, As the friction between the pipe 4 and the striated body L increases, the striated body L becomes difficult to advance due to the reduction of the air flow, and as shown in the striated body L '(solid line) in FIG. It starts to meander inside. At this time, a large resistance is generated in the movement of the striated body L ', and this resistance acts as a load (reaction force) for applying a brake to the pinch rollers 6, 6. When the force is the same as in the normal state and the pushing force (ability) is large, the force acts on the striatum L 'side as an unreasonable force, and the striatum L' buckles or finally Could be bent and damaged.

Therefore, in order to prevent such an excessive pushing, it is necessary to (1) reduce the pushing force (ability) of the pinch rollers 6, 6, that is, reduce the torque of a driving source such as a motor. , (2) pinch roller 6,
It is conceivable to reduce the roller side pressure (clamping pressure) in 6, for example. However, the above pinch rollers 6,
The pushing force of No. 6 varies depending on the type of the linear body L to be passed through and the pipe 4 for passing through the wire, the length of the pipe, and the size of the air flow (supply air pressure at the inlet), so that there is a certain margin. Large ability with is required. Therefore, the pinch rollers 6 and 6 having a small pushing ability (capacity) from the beginning may not be able to cope with a wide range of the striated body L and the pipe 4 for a wire, and the adaptability is reduced. On the other hand, when the roller side pressure (pinching pressure) of the pinch rollers 6, 6 is reduced, the slip between the pinch rollers 6, 6 and the striated body L eventually increases. There is a problem that the adaptability to the passage pipe 4 is reduced. At the same time, when trying to obtain the delivery length of the striatum L from the number of rotations of the roller,
There is also a problem that an accurate length cannot be obtained.

[0005] The present invention has been made in view of such conventional problems.

[0006]

Means for solving the above problem is to provide a communication line which has a communication line through which a striated body is passed, and an air supply path is joined to the communication line. A wire pipe is connected to the outlet port of the head, and a pinch roller driven by a driving source is installed on the inlet port side of the wire head, and the pinch roller is externally connected to the air supply path together with the rotation of the pinch roller. The compressed air is supplied from the above, the striated body passed through the passage of the shunt head is sent out to the pipe for the passage, and the load of the pinch roller is detected in the striated body passing method for passing the wire. And based on the detected data,
Magnetic fluid type clutch provided between the drive source and the pinch roller
Wherein the driving force to the pinch roller is controlled by a torque control unit comprising:

[0007]

As described above, according to the present invention, the driving force (pressing force) of the pinch roller is controlled by the load information of the pinch roller , and the torque of the magnetic fluid type clutch is controlled at that time.
Since the lock control unit is appropriately driven , excessive pushing is effectively prevented, and extremely fine and smooth wiring is performed.

[0008]

1 and 2 show a striated wire passing apparatus system for carrying out a striated wire passing method according to the present invention. In the figure, reference numeral 11 designates a communication line 12 in which a striated body L is passed, and a communication line head in which an air supply path 13 is joined to the communication line 12. Reference numeral 14 denotes an outlet side of the communication line head 11. , A reference numeral 15 denotes an air leak prevention portion provided on the introduction port side of the communication head 11, 16 and 16 denote a pair of pinch rollers provided on the introduction port side of the communication head 11, 17. Is a driving source such as a motor that is driven to rotate by energization from a power supply unit 18; 19 is a torque control unit interposed between the driving source 17 and the pinch rollers 16;
Reference numeral 0 denotes load detecting means such as an ammeter for detecting the load on the pinch roller based on the amount of current (load current) supplied to the driving source 17. Reference numeral 21 denotes the driving source 17 and the torque control unit 19 based on detection data from the load detecting means 20. This is a power control unit for controlling the amount of current supplied to the power supply.

As the torque control section 19, for example, a magnetic fluid or magnetic powder type clutch as shown in FIG. 3 is used. The clutch 19 includes, for example, an airtight clutch housing 31 having a connection shaft 31a connected to the shaft 17a of the drive source 17, an electromagnetic coil 32 installed therein, and a powder or liquid encapsulated therein. And a connection shaft 34a connected to, for example, one roller shaft 16a of the pinch rollers 16, 16, and a clutch board 34 embedded in the internal magnetic fluid 33.
Consists of In this clutch, the degree of magnetization of the magnetic fluid 33 changes depending on the amount of current supplied to the electromagnetic coil 32. Therefore, the degree of coupling between the clutch housing 31 and the clutch board 34 can be freely adjusted in accordance with the amount of current supplied. It has become.

Next, a method of passing a striated body of the present invention using the striated body tracing device system will be described. First, the pushing force of the pinch rollers 16, 16 is set in accordance with the type and length (insertion distance) of the striated filament L to be passed, and the driving force of the pinch rollers 16, 16 in accordance with the pipe 14. The pinch roller 1
6 and 16 are driven to rotate, and compressed air is supplied to the air supply path 13 of the wire head 11 from outside. As a result, the striatum L is passed through the passage pipe 14, and if there is no abnormality, it proceeds smoothly.

However, for any reason, for example, when the striated body L approaches a desired insertion distance (several kilometers or the like), the friction between the wire pipe 14 and the striated body L increases, and the striated body L
Becomes difficult to progress. Such a large resistance of the striatum L
Since it acts as a load (reaction force) on the pinch rollers 6, 6, the motor 17 serving as a drive source of the pinch rollers 6, 6
Load current increases. This increase is immediately detected by the load detection means 20 of the ammeter, and the detection data is input to the power control unit 21. In this power control unit 21,
The amount of energization corresponding to the above-described detection data is changed by the electromagnetic coil 3 of the magnetic fluid type clutch 19 forming the motor 17 and the torque control unit.
2, the pinch rollers 6, 6 can obtain an optimal driving force (pushing force).

For example, with respect to subtle fluctuations of the pinch roller load, the amount of current supplied to the electromagnetic coil 32 of the magnetic fluid clutch 19 is changed. Thereby, the degree of magnetization of the magnetic fluid 33 changes, and a delicate degree of coupling of the clutch is obtained. On the other hand, for relatively large fluctuations of the pinch roller load,
It is preferable to control the amount of current supplied to the motor 17 to directly control the rotational force. Of course, it is also possible to incorporate a microcomputer or the like and control the magnetic fluid type clutch 19 and the motor 17 as appropriate in accordance with the pattern of the load fluctuation. In addition, it is only necessary to stop the motor 17 or set the degree of coupling of the clutch 19 to zero to cope with an extremely rapid change in the load of the pinch roller.

In the above embodiment, when detecting the pinch roller load, the load detecting means 2 comprising an ammeter or the like is used.
Although the load current to the drive source 17 is detected by 0, the present invention is not limited to this. The load current may be obtained from the rotation speed of the pinch rollers 6, 6 or may be obtained from the running speed of the striatum L. It is possible.

[0014]

As described above, according to the striatal wire passing method according to the present invention, the load of the pinch roller is detected, and the driving force (push force) of the pinch roller is optimally controlled based on the load information. The forcible pushing is effectively prevented, and a smooth passage is performed. In particular, by providing a torque control unit consisting of a magnetic fluid type clutch between the drive source and the pinch roller
If this magnetic fluid type clutch is controlled based on the load information of the pinch roller, extremely fine and smooth line control can be obtained. Of course, in the present invention, by detecting the load of the pinch roller, it is possible to use a pinch roller having a large pushing force and to set a large roller side pressure (clamping pressure). We can respond with plenty of time. Further, since the sliding of the striated body is almost eliminated by setting the large roller side pressure, the insertion distance according to the number of rotations of the roller can be accurately obtained.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a striated body passing apparatus system for carrying out a striated body passing method according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a striatal wire passing device system of FIG. 1;

FIG. 3 is a longitudinal sectional view showing a torque control unit including a magnetic fluid type clutch.

FIG. 4 is a schematic longitudinal sectional view showing a striated body wire passing apparatus system for implementing a conventional striated body wire passing method.

FIG. 5 is an explanatory diagram showing a state of wire passage of a filament in a wire pipe;

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 communication head 12 communication line 13 air supply path 14 communication pipe 16 pinch roller 17 drive source 19 torque control unit 20 load detection means 21 power control unit L filament

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 6/46 H02G 1/08

Claims (1)

(57) [Claims] 1. A connecting pipe, which is connected to an outlet side of a connecting head in which an air supply path is merged with a connecting line through which a striated body is inserted, and the connecting line A pinch roller that is driven to rotate by a drive source is installed on the introduction port side of the head, and compressed air is supplied from the outside to the air supply path together with the rotation of the pinch roller, and the compressed air is passed through the communication path of the communication head. The striated body is sent out to the pipe for connection, and in the striated body connection method for passing the wire, the load of the pinch roller is detected, and based on the detection data,
Is it a magnetic fluid type clutch provided between the drive source and the pinch roller?
A driving method for the pinch roller is controlled by a torque control unit .