JP2010262001A - Optical fiber winding bobbin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical fiber winding bobbin allowing an optical fiber to cross a partition flange from an auxiliary winding shank part to a main winding shank part while preventing breakage of the optical fiber without stopping rotation of the bobbin. <P>SOLUTION: The optical fiber winding bobbin 10 has the cylindrical main winding shank part 12a and the auxiliary winding shank part 12b formed on at least one end side of the main winding shank part. The main winding shank part and the auxiliary winding shank part is separated from each other by the partition flange 11c having a radial direction slit 13 reaching the winding shank part. A corner part 13b on the circumference side of the radial direction slit is formed into a round shape with a radius of 10-30 mm. In the vicinity of the radial direction slit 13, thickness is gradually reduced toward the edge 13a of the slit on the auxiliary winding shank part side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optical fiber winding bobbin for winding and storing an optical fiber.

  The optical fiber core (or the optical fiber) is subjected to various inspections after production in order to guarantee its quality. The main inspection items include, for example, measurement of transmission loss. This measurement is based on the light intensity incident from one end of the optical fiber while being wound around a predetermined bobbin, and the other end. This is done by measuring the light intensity emitted from the part. For this reason, the both ends of the winding start end and winding end of the optical fiber core wound around the bobbin are taken out.

  In order to make it easy to take out (open out) the winding start end after winding the optical fiber core onto the bobbin, for example, Patent Document 1 discloses a book with an intermediate rod having a slit reaching the bobbin winding body. A structure having a lead winding portion in addition to the winding portion is disclosed. In this bobbin, after winding several tens to several tens of meters of the winding start portion of the optical fiber core wire around the lead portion, a predetermined amount of the optical fiber core wire is taken up by the main winding portion through the slit of the intermediate rod. .

  Further, in Patent Document 2, a bobbin having an auxiliary winding cylinder on the outer side of at least one of the flanges provided on both sides of the main winding cylinder is provided with a slit whose width increases from the outer periphery toward the inner periphery. It is disclosed. The slit is formed by a chamfered portion that opens from the main winding drum side toward the auxiliary winding drum side, and the corners of the slit are rounded (the degree of rounding is unknown). Then, after winding an optical fiber of about 10 m on the auxiliary winding drum for extraction, a predetermined amount of optical fiber is wound up by the main winding drum through the slit.

Utility Model Registration No. 2550934 JP 2005-17584 A

An empty bobbin that starts a new winding from a bobbin that has finished winding a predetermined amount when winding a continuous optical fiber core or an optical fiber (hereinafter referred to as an optical fiber) with a bobbin. In addition, switching is performed without interrupting the traveling of the optical fiber.
FIG. 4 is a diagram showing an outline of the switching operation of the optical fiber winding. The optical fiber 1 is guided by the traverse roller 2 and wound around the bobbins 3 and 3 ′. The figure shows a state in which the winding of the right bobbin 3 ′ reaches a predetermined amount and the winding is switched to the left empty bobbin 3. A claw wheel 4 that locks the winding start end is disposed on the winding start end side of the bobbins 3 and 3 ′.

  When the winding of the optical fiber 1 is shifted from the bobbin 3 ′ to the bobbin 3, the bobbin 3 starts to rotate, and the traverse roller 2 moves leftward so that the optical fiber contacts the body of the bobbin 3. invite. Next, the optical fiber 1 is pulled toward the claw wheel 4 by the fiber moving arm 5, the winding start end is locked, and the optical fiber 1 is cut by the cutter 6 by the subsequent rotation of the bobbin 3. At this stage, the fully wound right bobbin 3 ′ is removed from the winding device and replaced with an empty bobbin to be ready for the next winding.

FIG. 5 shows the winding state of the optical fiber after the switching operation is completed. The bobbin 3 includes, for example, a partition rod 7c having a slit 8 that reaches the winding drum portion between the flanges 7a and 7b, and includes a main winding drum portion 9a and an auxiliary winding drum portion 9b that feeds the winding start end. It is shown with a thing.
As shown in FIG. 5 (A), before winding the bobbin 3 around the main winding body 9a, the optical fiber 1 is first wound several m to several tens of meters around the auxiliary winding body 9b.

  Next, as shown in FIG. 5B, the bobbin 3 is traversed with respect to the optical fiber 1 in the direction of the auxiliary winding body 9b. With this traverse, the optical fiber 1 is transferred to the main winding body 9a through the slit 8 of the partition rod 7c. The transition of the optical fiber across the partition 7c is referred to as “over the shelf”. After the optical fiber 1 has crossed the shelf, as shown in FIG. 5C, the bobbin 3 is traversed so that the optical fiber 1 is wound around the main winding body 9a between the flange 7a and the partition rod 7c.

  The optical fiber crossing from the auxiliary winding drum portion 9b to the main winding drum portion 9a shown in FIG. 5B may fail because the optical fiber is broken by the corner of the slit. In particular, in the case of an optical fiber having a thin coating layer (clad portion in the case of HPCF) such as HPCF (Hard Plastic Clad Fiber), the probability of disconnection increases. When the optical fiber is disconnected, it is necessary to perform wiring again from the beginning, so that the equipment operation rate deteriorates and the product yield also decreases. In the case of rewinding instead of drawing the optical fiber, it is possible to detect the slit 8 of the partition rod 7c with a sensor or the like and temporarily stop or decelerate the rotation of the bobbin 3. When the rotation of 3 is temporarily stopped, winding control including deceleration before and after that is required. In addition, when switching the winding of FIG. 4, the effect of continuously winding the optical fiber 1 without interrupting the traveling of the optical fiber 1 is also halved.

  The present invention has been made in view of the above-described circumstances, and it is possible to cross the shelf from the auxiliary winding drum portion to the main winding drum portion without disconnecting the optical fiber without stopping the rotation of the bobbin. An object is to provide a bobbin for winding an optical fiber.

An optical fiber winding bobbin according to the present invention has a cylindrical main winding drum and an auxiliary winding drum on at least one end side of the main winding drum, the main winding drum and the auxiliary winding drum. Is a take-up bobbin for an optical fiber that is partitioned by a partition rod provided with a radial slit that reaches the winding body, and has a radius of 10 mm or more and 30 mm or less at the corner on the outer peripheral side of the radial slit. It is characterized by being attached.
Moreover, it is preferable that the vicinity of the radial slit is gradually thinned toward the edge of the slit on the auxiliary winding body side.

  According to the present invention, the optical fiber is not caught by the slits of the bobbin partition, and the frequency of occurrence of disconnection when the optical fiber is over the shelf from the auxiliary winding body to the main winding body can be reduced. As a result, there is no need to perform redrawing due to failure to cross the shelf, so that the optical fiber can be continuously wound without deteriorating the equipment operation rate and the product yield.

It is a figure explaining embodiment of the bobbin for optical fiber winding by this invention. It is a figure explaining other embodiment of this invention. It is a figure explaining the test result of the bobbin for optical fiber winding by this invention. It is a figure explaining the form of switching of an optical fiber. It is a figure explaining the form of the optical fiber over the shelf.

  An embodiment of the present invention will be described with reference to FIGS. In the figure, 10, 10a and 10b are optical fiber winding bobbins, 11a and 11b are saddles, 11c is a partition rod, 12a is a main winding drum portion, 12b is an auxiliary winding drum portion, and 13 is a radial direction of the divider rod. , 13a is an edge of the slit, 13b is a corner portion of the slit, and 13c is an inclined portion.

  As shown in FIG. 1A, an optical fiber winding bobbin 10 according to the present invention has a cylindrical main winding body 12a and an auxiliary winding body 12b at at least one end of the main winding body 12a. It is comprised so that it may have. On the end side of the main winding drum portion 12a and the auxiliary winding drum portion 12b, a collar 11a and a collar 11b are provided to store the optical fiber wound on the winding drum section so as not to collapse. Then, a partition rod 11c is provided between the rods 11a and 11b, the main winding body portion 12a is formed between the one rod 11a having a large rod interval, and the other rod 11b having a small rod interval is supported. It is set as the winding drum part 12b.

The flanges 11a and 11b and the partition rod 11c can be detachably assembled to the main winding drum portion 12a and the auxiliary winding drum portion 12b. In addition, as shown in the figure, the partition rod 11c can be formed as an auxiliary rod for the ribs 11a and 11b on both sides, with a smaller diameter than the ribs 11a and 11b, and with a reduced thickness.
In addition, it is good also as a structure which provides a partition rod also in the other edge part side of the main winding trunk | drum 12a, and has the auxiliary winding trunk | drum 12b on both sides of the main winding trunk | drum 12a.

  The partition rod 11c has a radial slit 13 that reaches the winding drum portion from the outer periphery of the rod, and the main winding drum portion 12a and the auxiliary winding drum portion 12b communicate with each other. As shown in FIG. 1B, the slit 13 has a rounded edge 13a so as not to damage the optical fiber that crosses the slit 13 and crosses the shelf. In addition, the vicinity of the slit 13 has an inclined winding portion 13c on the auxiliary winding drum portion 12b side so that the thickness gradually becomes thinner toward the edge direction, and the optical fiber is from the auxiliary winding drum portion 12b side to the main winding drum portion 12a side. Make it easy to move to.

  Moreover, when the slit 13 is formed, a corner as shown by a chain line is generated on the outer peripheral side of the partition wall 11c. In the present invention, in particular, the corners are rounded with a radius R to form arcuate corners 13b. By rounding the corners, when the optical fiber crosses the shelf from the auxiliary winding drum portion 12b to the main winding drum portion 12a, the optical fiber can be prevented from being caught or damaged due to breakage. It becomes possible. However, depending on the radius R of the roundness, it is difficult to obtain a predetermined shelf-span success rate as will be described later.

  FIG. 2 is a view showing another embodiment of the optical fiber winding bobbin according to the present invention. The bobbin 10a shown in FIG. 2 (A) has a partition rod 11c having the same diameter and thickness as the flanges 11a and 11b on both sides. It is an example formed by. Since the main part that winds and stores the optical fiber is the main winding body 12a, the partition rod 11c that forms the main winding body 12a also has the same diameter and mechanical strength as the flanges 11a and 11b on both sides. Can be provided. Also in this case, the slit 13 described in FIGS. 1B and 1C is formed in the same form.

  The bobbin 10b shown in FIG. 2 (B) is an example in which the diameter and thickness of the flange 11b of the auxiliary winding body 12b are reduced. Since the auxiliary winding body portion 12b is intended to lead out the winding start end of the optical fiber and is intended to have a small winding amount of about a few tens of meters, the flange 11b side of the end portion forming the auxiliary winding body portion 12b The winding drum width and the main winding drum portion 12a can be reduced. In this case, the partition rod 11c needs to have a function as a main rod for winding the optical fiber, and as described with reference to FIG. 2A, the rod 11a provided at the end on the main winding body 12a side. It is formed with the same diameter and mechanical strength. In addition, also in this case, the slit 13 demonstrated in FIG.1 (B), (C) is formed with the same form also in the partition rod 11c. 1 and 2 show an example in which there is one slit in the ridge, but there may be a plurality of slits. When there are a plurality of slits, when the optical fiber crosses the shelf, the time for rubbing at the edge of the heel is shortened, so that the optical fiber is less likely to be damaged.

  The above-described bobbins 10 to 10b for winding the optical fiber are set in the switching device described above with reference to FIG. 4 and are wound by sequentially switching the bobbins without interrupting the traveling of the optical fiber 1. The bobbin 10 according to the present invention corresponds to the bobbins 3 and 3 ′ in FIG. 4, and the optical fiber 1 is guided by the traverse roller 2 and wound around the bobbins (10 and 10 ′). When the winding of the right bobbin (10 ') reaches a predetermined amount, the winding can be switched to the left empty bobbin (10).

  When the winding of the optical fiber 1 is shifted from the bobbin (10 ′) to the bobbin (10), the bobbin (10) starts rotating, and the traverse roller 2 moves to the left to move the optical fiber to the bobbin (10 ) Guide the body to touch the body. Subsequently, the optical fiber 1 is pulled toward the claw wheel 4 by the fiber moving arm 5 to lock the winding start end, and the optical fiber 1 is cut by the cutter 6 by the subsequent rotation of the bobbin (10). At this stage, the fully wound right bobbin (10 ') is removed from the winding device and replaced with an empty bobbin to be ready for the next winding.

  After the above-described bobbin switching operation is completed, the bobbin (10) is, as shown in FIG. 5 (A), prior to winding of the bobbin (10) of the optical fiber 1 at the main winding body portion 9a, As an example, several m to several tens of meters are wound around the auxiliary winding body 9b. Next, without stopping the rotation of the bobbin (10) and the traveling of the optical fiber 1, as shown in FIG. 5 (B), the bobbin (10) is oriented with respect to the optical fiber 1 on the auxiliary winding body 9b side. To traverse. With this traverse, the optical fiber 1 is passed over the shelf to the main winding body portion 9a side through the slit 8 of the partition rod 7c. After the optical fiber 1 has crossed the shelf, as shown in FIG. 5C, the bobbin (10) is traversed so that the optical fiber 1 is wound between the flange 7a and the partition rod 7c.

  FIG. 3 is a diagram showing the results of testing the relationship between the rounding radius R of the corner 13b of the slit 13 shown in FIG. The bobbin used in this test had a bobbin body diameter of 280 mm, a partition rod diameter of 395 mm, a partition rod thickness of 6 mm, a winding drum width of 218 mm, an optical fiber diameter of 0.25 mm, and a winding pitch of 0.25 mm. I wound up with. The partition wall slit width S is set to 10 mm, the inclined portion width h is set to 15 mm, the slit edge thickness d is set to about 2 mm, and the rounding radius R of the corner portion is changed in the range of 0 mm to 40 mm, and the success rate over the shelf is changed. I investigated. The linear velocity of the optical fiber was 80 m / min.

  As a result of the test, as shown in FIG. 3A, in the state where the rounding radius R is “0 mm to 5 mm”, the success rate over the shelf is around 20%. For this reason, in most cases, disconnection and redrawing are necessary. However, the rounding radius R was 10 mm and the success rate over the shelf was 80%, the rounding radius R was 20 mm and the success rate over the shelf was 98%, and the rounding radius R was 30 mm and the success rate over the shelf was 99%.

  As a result, by rounding the corners of the slits provided in the partition with a radius of 10 mm or more, it is possible to succeed over the shelf with a probability of 80% or more without interrupting the traveling of the optical fiber and the bobbin. it can. If the rounding radius R of the corner of the slit is increased, the exposed area at the winding side of the optical fiber is increased, and the retracted state of the winding is lost, and it is easily damaged. It is not possible. FIG. 3B shows the result of simulating the relationship between the maximum winding amount (km) of the optical fiber and the round radius R (mm) of the slit corner that can be safely wound. Since the normal winding amount of this optical fiber is 80 km or more, the upper limit roundness radius R30 mm or less.

DESCRIPTION OF SYMBOLS 1 ... Optical fiber, 2 ... Traverse roller, 3, 10, 10a, 10b ... Bobbin, 4 ... Claw wheel, 5 ... Fiber moving arm, 6 ... Cutter, 7a, 7b, 11a, 11b ... Scissors, 7c, 11c ... Partition 9a, 12a ... main winding drum, 9b, 12b ... auxiliary winding drum, 8, 13 ... radial slit, 13a ... edge of slit, 13b ... corner of slit, 13c ... slope.

Claims (2)

A cylindrical main winding drum and an auxiliary winding drum on at least one end side of the main winding drum, the main winding drum and the auxiliary winding drum being a radial slit that reaches the winding drum. An optical fiber winding bobbin partitioned by a partition rod provided with
A bobbin for winding an optical fiber, wherein a corner having a radius of 10 mm or more and 30 mm or less is rounded at a corner on the outer peripheral side of the radial slit.   2. The optical fiber winding bobbin according to claim 1, wherein the vicinity of the radial slit is gradually thinned toward the edge of the slit on the auxiliary winding body side.

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