JP2757677B2 - Optical fiber screening equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screening apparatus for performing a tensile test by applying a load to an optical fiber.

[0002]

2. Description of the Related Art In an optical fiber manufacturing line, a proof test (screening test) for applying a certain tension to a part of a line and removing a weak part by breaking is usually performed in order to guarantee the break life of the optical fiber. I have to. This screening test is performed by a screening device.

A conventional screening apparatus will be described with reference to FIG. FIG. 7 shows a schematic configuration of a conventional screening apparatus.

[0004] In the drawing, reference numeral 1 denotes a feeding roll for feeding out a drawn optical fiber 2, 3 denotes a capstan wheel on which the optical fiber 2 is wound and drawn, and the capstan wheel 3 supports the optical fiber 2 by a capstan belt 4. It has become. 5 is a screening roll, 6 is a tension roll, 7 is a take-up roll, and the capstan wheel 3 and the screening roll 5
The tension is applied to the optical fiber 2 by the axial torque between
The optical fiber 2 is wound by the winding roll 7.
Reference numeral 8 denotes an arm-type feeding dancer provided between the feeding roll 1 and the capstan wheel 3, and reference numeral 9 denotes an arm-type winding dancer provided between the tension roll 6 and the winding roll 7. Between the feed roll 1 and the capstan wheel 3 and the take-up roll 7
The fluctuations in the speed and the tension during the period are absorbed by the feeding dancer 8 and the winding dancer 9.

In the above-described screening apparatus, the optical fiber 2 is fed from the feeding roll 1, tension is applied between the capstan wheel 3 and the screening roll 5 by an axial torque, and the winding is performed by the winding roll 7. The line speed is determined by driving the capstan wheel 3. Fluctuations in speed and tension between the feeding roll 1 and the capstan wheel 3 and between the capstan wheel 3 and the winding roll 7 are absorbed by the feeding dancer 8 and the winding dancer 9. Optical fiber 2 between capstan wheel 3 and screening roll 5
And the optical fiber 2 is disconnected at the low strength portion. Thus, the low-strength portion of the optical fiber 2 is not taken up by the take-up roll 7.

[0006]

In the conventional screening apparatus, when the optical fiber 2 in the low-strength portion is disconnected (screening disconnection), a change in the tension of the system is detected by the winding dancer 9, and the arm 9a swings. Disconnection has been detected at the end. When the disconnection is detected, the machine is stopped to perform the wire return. However, if the optical fiber 2 is disconnected at any time other than the screening test due to an abnormality of the machine (abnormal disconnection) such as a sudden increase in the speed of the take-up roll 7, the arm 9a becomes a swing end and the machine stops as described above. I do. For this reason, abnormal disconnection and screening disconnection cannot be distinguished,
At present, when the machine stops, even if the screening is broken, the machine must be inspected before returning to the hooking state.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a configuration of the present invention is to provide a capstan wheel on which an optical fiber is wound and pulled by being driven, and an optical fiber drawn out from the capstan wheel. A winding wheel, a screening roll that applies tension to the optical fiber between the capstan wheel and the winding wheel to break and remove a weak portion, and an arm that is provided between the screening roll and the winding wheel swings. In a screening apparatus for an optical fiber provided with a dancer roll that absorbs fluctuations in the feeding speed and the tension, the optical fiber is wound between the capstan wheel and the screening roll when a disconnection of the optical fiber during the screening test is detected. Detection of disconnection disconnection that stops wheel drive When, characterized by comprising an arm fixing unit for fixing the swing arm of the dancer roll in broken lines off is driven by a signal disconnection line out detector has occurred.

[0008]

When the disconnection detector detects a disconnection in the low-strength portion of the optical fiber, the drive of the winding wheel is stopped immediately after the disconnection, and the swing of the dancer roll arm is fixed by the arm fixing means. Then, the disconnection signal is not output from the dancer roll side to distinguish it from the abnormal disconnection.

[0009]

1 shows a schematic configuration of an optical fiber screening apparatus according to an embodiment of the present invention, FIG. 2 shows a perspective view of a disconnection disconnection detector, and FIG. 3 shows a schematic configuration of an arm fixing means. is there. Since the entire configuration of the screening apparatus is the same as that shown in FIG. 7, the same reference numerals are given and duplicate explanations are omitted.

As shown in FIG. 1, a disconnection disconnection detector (disconnection detector) 11 is provided between the capstan wheel 3 and the screening roll 5. Disconnection detector 11
As shown in FIG. 2, a detection roller 11a around which the optical fiber 2 is wound and a tension of the rotation axis of the detection roller 11a are detected (the tension of the optical fiber 2 is detected).
And a detector 12 for detecting disconnection and deviation of the line. When the detector 12 detects disconnection or disconnection of the optical fiber 2, a detection signal is output to a control device (not shown), and a drive stop signal is output to the winding roll 7.

The winding dancer 9 has an arm fixing means 13
The arm fixing means 13 is driven by a detection signal of the disconnection detector 11, and the arm 9a is fixed by the arm fixing means when disconnection or disconnection of the optical fiber 2 is detected.

As shown in FIG. 3, the arm fixing means 13 has a pair of pushing cylinders 14 as pressing members, and pushes the pushing cylinder 1 in the swinging plane of the arm 9a (from above and below in the figure).
4, the arm 9a is pressed and fixed. In the figure, reference numeral 15 denotes a proximity switch for detecting the upper limit and the lower limit of the arm 9a. When the optical fiber 2 is disconnected other than in the screening test (abnormal disconnection), the arm fixing means 13 does not operate,
When the arm 9a swings to the upper limit or the lower limit, the proximity switch 15 is operated, and the machine is abnormally stopped.

The operation of the screening apparatus having the above-configured disconnection detector 11 and arm fixing means 13 will be described with reference to FIG. FIG. 4 is a control block diagram showing the operation status.

The low-strength portion of the optical fiber 2 is broken between the capstan wheel 3 and the screening roll 5. When the optical fiber 2 is disconnected, the detector 12 of the disconnection detector 11
The disconnection immediately after the disconnection is detected. A signal from the disconnection detector 11 is sent to a take-up brake 16 and a take-up motor 17 of the take-up roll 7 via the control unit 15 to operate the take-up brake 16 and stop the take-up motor 17. As a result, immediately after the optical fiber 2 is disconnected, the driving of the winding roll 7 is stopped. This prevents the end of the optical fiber 2 from being wound around the winding roll 7 after the disconnection.

When the disconnection of the optical fiber 2 is detected by the disconnection detector 11, the drive of the winding roll 7 is stopped, and at the same time, the arm fixing means 13 is driven.

That is, as shown in FIG.
Is sent to the arm fixing means 13 through the control section 15 to drive the pushing cylinder 14 of the arm fixing means 13 to clamp and fix the arm 9a. Therefore, if the optical fiber 2 is disconnected during the screening test, the proximity switch 15 is not operated by the arm 9a, and the machine does not stop abnormally.
The optical fiber 2 can be restarted immediately after the return to the hooked state.

Another embodiment of the disconnection detector will be described with reference to FIG. FIG. 5 shows a schematic configuration of another embodiment of the disconnection detector.

A disconnection disconnection detector (disconnection detector) 21 shown in FIG. 5 includes a light source 22 and a light receiver 23, and the optical fiber 2 exists between the light source 22 and the light receiver 23. . When the optical fiber 2 is present (when disconnection and disconnection do not occur), light from the light source 22 is blocked by the optical fiber 2 and does not reach the light receiver 23. When the low-strength portion of the optical fiber 2 is disconnected, the optical fiber 2 is not present, and the light from the light source 22 is detected by the light receiver 23, and the disconnection is detected in a non-contact manner.

Another embodiment of the arm fixing means will be described with reference to FIG. FIG. 6 shows a schematic configuration showing another embodiment of the arm fixing means.

The arm fixing means 35 shown in FIG. 6 is an extruding cylinder 31 driven in a direction perpendicular to the swing surface of the arm 9a, and a fixing member provided on a driving rod of the extruding cylinder 31 and fitted to the arm 9a. And a moving cylinder 33 for moving the arm 9a in a horizontal state. When a disconnection is detected by the disconnection disconnection detector, the arm 9a is moved horizontally by driving the moving cylinder 33, and the hand 32 is fitted to the arm 9a by driving the pushing cylinder 31, and the arm 9a is moved.
a is fixed at the horizontal position.

In the above-described screening apparatus, since the disconnection detector 11 for detecting the disconnection of the disconnection of the optical fiber 2 and stopping the driving of the winding roll 7 is provided between the capstan wheel 3 and the screening roll 5, screening is performed. If the low-strength portion of the optical fiber 2 breaks during the test, the drive of the winding roll 7 can be stopped immediately after the break. This prevents the end of the optical fiber 2 from being wound around the take-up roll 7 after the disconnection, so that the position of the end cannot be determined or the optical fiber 2 already wound on the take-up roll 7 is not damaged.

In the above-described screening apparatus,
An arm fixing means 13 for fixing the swing of the arm 9a of the winding dancer 9 when the low-strength portion of the optical fiber 2 is broken by being driven by a signal from the disconnection detector 11 is provided. When the wire 2 is disconnected, the operation of the winding dancer 9 can be stopped without the machine being in an abnormal stop state. For this reason,
Immediately after disconnection, the optical fiber 2 can be hooked and returned to restart the machine.

[0023]

According to the screening apparatus of the present invention, a disconnection detector for detecting disconnection of the optical fiber during the screening test and stopping the drive of the winding wheel is provided, and a signal from the disconnection detector is provided based on the signal of the disconnection detector. When the optical fiber is disconnected during the screening test, the arm is fixed by the arm fixing means. The machine is not stopped from the dancer roll side. As a result, the disconnection of the optical fiber at the time of the screening test can be distinguished from the disconnection of the optical fiber at the time of a mechanical abnormality, and the machine can be restarted immediately upon disconnection of the screening.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an optical fiber screening apparatus according to one embodiment of the present invention.

FIG. 2 is a perspective view of a disconnection disconnection detector.

FIG. 3 is a schematic configuration diagram of arm fixing means.

FIG. 4 is a control block diagram showing an operation state of the screening device.

FIG. 5 is a schematic configuration diagram showing another embodiment of a disconnection disconnection detector.

FIG. 6 is a schematic configuration diagram showing another embodiment of the arm fixing means.

FIG. 7 is a schematic configuration diagram of a conventional optical fiber screening apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 feeding roll 2 optical fiber 3 capstan wheel 5 screening roll 7 take-up roll 9 take-up dancer 9a arm 11, 21 disconnection disconnection detector (disconnection detector) 11a detection roller 12 detector 13, 35 arm fixing means 14 push-out Cylinder 22 Light source 23 Light receiver 31 Extrusion cylinder 32 Hand 33 Moving cylinder

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-164228 (JP, A) JP-A-63-170238 (JP, A) JP-A-60-179625 (JP, A) 128935 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) C03B 37/12

Claims (3)

(57) [Claims] 1. A capstan wheel on which an optical fiber is wound and drawn by being driven, a winding wheel for winding an optical fiber unreeled from the capstan wheel, and an optical fiber between the capstan wheel and the winding wheel. And a dancer roll provided between the screening roll and the take-up wheel to absorb fluctuations in the feeding speed and the tension by swinging the arm. In a fiber screening apparatus, a disconnection disconnection detector provided between a capstan wheel and a screening roll to detect disconnection of an optical fiber during a screening test and stop driving of a winding wheel, and disconnection disconnection detection Driven by the signal of the container, disconnection disconnection occurs An optical fiber screening device, comprising: an arm fixing means for fixing the swing of the arm of the dancer roll when the dancer rolls. 2. The optical fiber screening apparatus according to claim 1, wherein the arm fixing means includes a pair of pressing members for holding the arm within the swinging surface of the arm. 3. The optical fiber screening apparatus according to claim 1, wherein the arm fixing means includes a fixing member for fixing the arm from a direction orthogonal to the swing surface of the arm.