JP6270970B2 - Reel for winding optical fiber - Google Patents

Description

  The present invention relates to a reel for winding an optical fiber.

  The optical fiber is usually prepared for use while being wound around a reel. When the optical fiber is manufactured, the entire length thereof is wound around a bobbin, and a length suitable for use is drawn from the bobbin and wound on a reel. The reel is rotated by a winder to wind the optical fiber. Therefore, the optical fiber receives tension due to the rotation of the reel during winding, but it is not preferable for the characteristics of the optical fiber to be held on the reel with the tension. The optical fiber characteristics cannot be measured and inspected correctly under conditions. Therefore, Patent Document 1 discloses a reel that can be wound and held on the reel in a loose state by removing the tension of the optical fiber after being wound on the reel.

  The reel disclosed in Patent Document 1 has a short cylindrical body portion on which an outer peripheral surface around which an optical fiber is wound is formed, and radially outward from the body portion at both axial ends of the body portion. It has a pair of flanges that project and form an annular plate shape. A pin-like member insertion hole is formed as a small hole in the flange at a radial position close to the outer peripheral surface at one place in the circumferential direction.

  In order to wind the optical fiber around the reel disclosed in Patent Document 1, prior to winding, the pin-shaped member is fitted into the pin-shaped member insertion hole of the reel. By inserting the pin-like member, the pin-like member is positioned so as to extend in the axial direction in the vicinity of the outer peripheral surface of the reel body, and a protrusion is formed on the outer peripheral surface at one place in the circumferential direction. It will be in the state.

  When the optical fiber is wound around a reel in which such a pin-shaped member is inserted, the optical fiber is in close contact with the cylindrical outer peripheral surface except the position of the pin-shaped member in the circumferential direction to form a wound layer. At the position of the pin-shaped member, the pin-shaped member is wound up by the diameter of the pin-shaped member. Although the tension at the time of winding remains in the optical fiber at the end of winding, it is raised at the position of the pin-like member, so the length of one round of fiber is longer than one round of the outer peripheral surface. Yes.

  After the winding is completed, the pin-shaped member is extracted. As a result, the optical fiber has an extra length that is longer than one round of the outer circumferential surface, and the winding on the outer circumferential surface becomes loose and released from the tension.

JP2013-112454A

  Such a reel for winding an optical fiber has a relatively small diameter because it is sufficient to wind an optical fiber having a length suitable for use. On the other hand, many reels are produced. Therefore, it is required that the reel can be manufactured at low cost. In general, synthetic resin is integrally molded for this purpose.

  When a cylindrical product is made by integral molding of synthetic resin, especially when a hole for a shaft is formed in the reel, the molding die is divided in the axial direction.

  However, in the reel of Patent Document 1, annular plate-like flanges are provided on both side ends of the cylindrical body, and such a reel is made only by the mold divided in the axial direction. I can't. In Patent Document 1, there is a description that the reel is composed of an injection-molded product formed of a thermoplastic resin. For this purpose, the reel is positioned on the outer surface side of the flange in the axial direction and is contacted and separated in the axial direction. In addition to the mold divided in such a manner, a mold having a semi-cylindrical surface divided so as to be in contact with and away from the inner surface side of the flange, that is, the body portion located between both flanges in the diametrical direction is also included. This necessitates complicated molds and molding processes, and the reel is expensive. In addition, when a mold that is divided in the diameter direction is used, there is a possibility that a molding burr may appear on the outer peripheral surface of the cylindrical portion of the reel at the contact portion between the molds, and the roundness may not be ensured.

  Further, in Patent Document 1, a pin-shaped member is fitted into the reel before winding the optical fiber to form a protruding portion at one location on the outer peripheral surface of the reel, and the pin-shaped member is extracted after winding. Thus, an extra length is given to the wound optical fiber, and as a result, an optical fiber winding body free from tension is obtained. However, the characteristics of optical fibers are likely to change or deteriorate due to deformation as well as stress. Therefore, even if the optical fiber wound on the reel according to Patent Document 1 is released from the tension, the contact portion with the pin-like member is locally deformed with a large degree of deformation by the small-diameter pin-like member. Thus, the influence tends to remain even after the pin-shaped member is extracted. Such local deformation remains unfavorably affecting the characteristics of the optical fiber.

  In view of such circumstances, it is an object of the present invention to provide a reel that can be easily manufactured as a result only with a metal mold divided in the axial direction and as a result, at low cost.

  A reel for winding an optical fiber according to the present invention includes a cylindrical portion formed with a cylindrical outer peripheral surface for winding and holding an optical fiber, and flanges provided at both side end positions in the axial direction of the cylindrical portion. Part.

  In such a reel, in the present invention, the flange portion is formed by a flange piece extending radially outward from the outer circumferential surface of the cylinder at a plurality of positions in the circumferential direction and a notch portion between adjacent flange pieces in the circumferential direction. The flange piece at one side end position is located within the circumferential range of the notch portion at the other side end position, and the reel is an annular disk extending radially inward from the inner diameter of the cylindrical portion. And a cylindrical inner shaft portion extending in the axial direction from the inner diameter of the annular disc portion toward the other side end, the cylindrical portion is a circumferential range in which a notch portion is formed. The groove portion that opens in the axial direction at the other side end position is formed through the cylindrical portion in the radial direction, and the groove inner wall surface that forms the groove portion and faces in the circumferential direction forms a convex curved surface. The inner shaft portion is spaced from the annular disk portion in the axial direction. One in position, the restricting projection which projects from the outer peripheral surface of the inner shaft portion radially outward is characterized in that it is provided.

  In the present invention, the flange piece at one side end position is located within the circumferential range of the notch at the other side end position. Accordingly, after the mold is arranged in the axial direction toward the other side end position at the position that becomes the other side end position and the flange piece at the one side end position is molded, the mold is Then, it can be extracted in the direction of the one side end position in the axial direction through the cutout portion of the other side end position positioned corresponding to the flange piece. That is, the flange piece at the other side end position does not become an obstacle to the extraction of the mold. Therefore, in the present invention, the reel can be formed only by a mold that contacts and separates in the axial direction, and a conventional mold that contacts and separates in the diametrical direction is not necessary when forming the flange portion. With only a small number of dies, the reel can be easily formed without complicating the arrangement of the dies. In addition, in the present invention, as described above, a mold that contacts and separates in the diametrical direction is not necessary, so that molding burr cannot be formed on the cylindrical outer peripheral surface of the cylindrical portion that forms the winding surface, and the roundness is also accurate. It becomes.

  In the present invention, the cylindrical portion of the reel is formed such that a groove portion that opens in the axial direction at the other side end position penetrates the cylindrical portion in the radial direction within the circumferential range where the notch portion is formed. ing. By forming such a groove portion, the end portion of the optical fiber can be introduced from the outer peripheral surface of the cylinder toward the inner shaft portion through the groove portion, and the end portion of the optical fiber can be accommodated in the cylindrical portion. Further, in the present invention, by providing the inner shaft portion, when winding the optical fiber around the reel, one end portion which is the winding start end side of the optical fiber is wound around and supported on the inner shaft portion. It becomes possible to keep. Further, by providing the restriction projection on the inner shaft portion, it is possible to prevent the optical fiber wound around the inner shaft portion from coming off in the axial direction by the restriction by the restriction projection.

  In the present invention, as described above, the flange portion is formed by the flange pieces provided at a plurality of positions in the circumferential direction on both side ends in the axial direction, and the notch portions between the flange pieces. The flange piece is positioned in the circumferential range of the notch at the other side end position. Therefore, when molding a reel using a mold, the mold can be pulled out from the notch in the axial direction after molding, so that it is possible to use a small number of molds and complex mold placement. This makes it possible to easily form a reel without having to.

It is a perspective view which shows the reel which concerns on 1st embodiment of this invention. (A) is a side view of the reel of FIG. 1, (B) is a front view of the reel of FIG. 1, and (C) is a IIC-IIC sectional view of (A). (A) is a perspective view showing a state immediately before attaching the reel of FIG. 1 to a jig for winding an optical fiber, (B) is a perspective view showing a state of attaching the reel of FIG. 1 to the jig, (C) is a IIIC-IIIC sectional view of (B). It is a side view which shows the state which wound the optical fiber around the reel of FIG. It is a perspective view which shows the reel which concerns on 2nd embodiment, (A) is the state which separated two half reel bodies, (B) is the state which the half reel bodies of (A) were combined, and the reel was completed. Is shown. The reel which concerns on 3rd embodiment is shown, (A) is a perspective view of the state which isolate | separated two half reel bodies, (B) is the half reel body of (A) couple | bonded, and the reel was completed. The perspective view of a state, (C) is IV-IV sectional drawing of (B).

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

<First embodiment>
The reel 1 according to this embodiment is configured to wind and hold an optical fiber F (see FIG. 4). In this embodiment, the optical fiber F is a cable in which a coated optical fiber core wire is covered with an electrical insulating material, and after being wound around the reel 1, photoelectric conversion connectors (FIG. 4) are provided at both ends thereof. Connectors C1, C2) are attached. The form of the optical fiber F is not limited to this, and coating or coating is not essential, and the connector may not be attached. Further, the connectors C1 and C2 may be optical connectors instead of the photoelectric conversion connectors.

  The reel 1 is formed by molding by forming an electrical insulating material such as synthetic resin so that the entire reel forms one member. As shown in FIG. 1, the reel 1 includes a cylindrical portion 11 formed with a cylindrical outer peripheral surface for winding and holding an optical fiber F (not shown), and one side in the axial direction of the cylindrical portion 11. The first flange portion 12 provided at the end position, the second flange portion 13 provided at the other side end position (see also FIG. 2B), and the cylinder at one side end position of the cylindrical portion 11 An annular disc portion 14 extending radially inward from the inner diameter of the portion 11, and extending in the axial direction from the inner diameter of the annular disc portion 14 toward the other side end side at the center position of the annular disc portion 14. And a cylindrical inner shaft portion 15. Further, an antistatic material layer is formed on the entire surface of the reel 1 by applying an antistatic material to prevent charging of a semiconductor incorporated in a connector C1 described later, thereby protecting the semiconductor. Further, instead of forming the antistatic material layer on the reel 1, the reel 1 itself may be constituted by integral molding of an antistatic material (for example, an antistatic resin).

  The first flange portion 12 is provided at one side end position of the cylindrical portion 11, that is, at the same position as the annular disk portion 14 in the axial direction, and a plurality of positions having equal intervals in the circumferential direction of the cylindrical portion 11. (In this embodiment, four locations) are formed by a first flange piece 12A extending radially outward from the outer circumferential surface of the cylinder and a first notch 12B between the flange pieces 12A adjacent in the circumferential direction. ing. In addition, the second flange portion 13 is provided at the other side end position of the cylindrical portion 11, and the cylindrical outer peripheral surface at a plurality of positions (four locations in the present embodiment) that are equally spaced in the circumferential direction of the cylindrical portion 11. The second flange piece 13A extending outward in the radial direction from the first and second notch portions 13B between the second flange pieces 13A adjacent in the circumferential direction. The optical fiber F wound around the cylindrical outer peripheral surface of the cylindrical portion 11 is restricted from moving in the axial direction by the first flange piece 12A and the second flange piece 13A, whereby the optical fiber F from the cylindrical portion 11 is restricted. Inadvertent disconnection is prevented.

  The 1st flange part 12 and the 2nd flange part 13 are mutually formed in the same shape, and the outer edge (edge part located in a radial direction front-end | tip) has comprised circular arc shape. Further, the first flange portion 12 and the second flange portion 13 have the same shape, but the first flange piece 12A is within the circumferential range of the second notch portion 13B, as shown in FIG. And the second flange piece 13A is shifted in the circumferential direction so that the second flange piece 13A is positioned within the circumferential range of the first notch 12B.

  The cylindrical portion 11 is in the axial direction within the circumferential range in which the second notch portion 13B is formed at the other side end position (position where the second flange portion 13 is formed) in the axial direction. A groove portion 11A is formed so as to penetrate the cylindrical portion 11 in the radial direction. 11 A of this groove part is formed as an inlet for introducing into the inner shaft part 15 the one end part used as the winding start end side of the optical fiber F wound around a cylindrical outer peripheral surface (refer FIG. 4).

  The annular disc portion 14 has locking holes 14A penetrating in the axial direction at positions corresponding to the first flange pieces 12A in the circumferential direction. As will be described later, the locking hole 14A receives the drive pin 24 of the jig 2 in the axial direction for winding an optical fiber, thereby locking the drive pin 24 in the circumferential direction to reel. 1 can be rotated (see FIGS. 3B and 3C). In addition, as shown in FIG. 1 and FIGS. 2A and 2C, the annular disc portion 14 is located at a position opposed to the later-described regulating protrusion 15 </ b> A provided on the inner shaft portion 15 in the axial direction, in other words, Then, an extraction hole portion 14B penetrating in the axial direction is formed at the same position as the restricting protrusion 15A in the circumferential direction. As will be described later, when the reel 1 is molded, the extraction hole portion 14B allows extraction of a mold (not shown) arranged to form the restriction projection 15A in the axial direction. To do. Accordingly, the extraction hole portion 14B has a similar shape to the restriction projection 15A, but has an inner edge that is slightly larger than the outer shape of the restriction projection 15A.

  The inner shaft portion 15 is wound around the outer peripheral surface of the inner shaft portion 15 after one end portion that is the starting end side of the optical fiber F is drawn through the groove portion 11A (see FIG. 4). The inner shaft portion 15 is formed with a restricting projection 15A that protrudes radially outward from the outer peripheral surface of the inner shaft portion 15 at a position corresponding to the second flange piece 13A in the circumferential direction. The restricting protrusion 15A is provided at a position having a space between the restricting protrusion 15A and the annular disk portion 14 in the axial direction, and extends to a position close to the inner peripheral surface of the cylindrical portion 11 in the radial direction.

  The restriction protrusion 15A restricts movement of the optical fiber F wound around the inner shaft portion 15 between the annular disk portion 14 and the restriction protrusion 15A in a direction away from the annular disk portion 14 in the axial direction. Thus, inadvertent detachment of the optical fiber F from the inner shaft portion 15 is prevented.

  The inner shaft portion 15 is formed with an attachment hole portion 15 </ b> B penetrating in the axial direction on the inner peripheral surface of the inner shaft portion 15. The mounting hole portion 15B is configured to receive a mounting shaft portion 23 provided in the jig 2 for winding the optical fiber F described later in the axial direction (FIGS. 3B and 3C). reference).

  The reel 1 having such a configuration is manufactured by integrally molding with an electrical insulating material using two molds (not shown) divided so as to be in contact with and separated from each other in the axial direction of the reel 1. Specifically, the two molds are placed in contact with each other in the axial direction, and after the molten electrical insulating material is injected and solidified between the molds, the two molds are moved in the axial direction. By pulling out so as to be separated from each other, the entire reel 1 is integrally formed as one member.

  In the present embodiment, as described above, the first flange piece 12A is located in the circumferential range of the second notch, and the second flange piece 13A is located in the circumferential range of the first notch 12B. doing. Accordingly, one mold for molding the first flange piece 12A is arranged in the axial direction from the second notch 13B side, and the other mold for molding the second flange piece 13A is arranged in the axial direction. It can arrange | position from the notch part 12B side at all. In addition, after the molding of the first flange piece 12A and the second flange piece 13A, the respective molds can be extracted in the axial direction through the second notch portion 13B and the first notch portion 12B. That is, the flange pieces 12A and 13B do not become an obstacle to the extraction of the mold.

  Therefore, in the present embodiment, the reel 1 can be formed only by a mold that contacts and separates in the axial direction, and a mold that contacts and separates in the diametrical direction as in the related art becomes unnecessary. With this mold, the reel can be easily formed without complicating the mold arrangement. Further, in the present embodiment, a die that contacts and separates in the radial direction of the reel is not required, so that a molding burr cannot be formed on the cylindrical outer peripheral surface of the cylindrical portion that forms the winding surface, and the roundness is accurate. Become.

  Next, a jig 2 for winding the optical fiber F around the reel 1 will be described with reference to FIGS. A jig 2 shown in FIG. 3A is a rotation driving member provided in the winder, and the reel 1 is driven to rotate with the reel 1 attached to the jig 2. Yes. By rotating the reel 1, the reel 1 pulls out the optical fiber F from a bobbin (not shown) around which the entire length of the optical fiber is wound and winds the reel 1.

  The jig 2 is made of an electrical insulating material or a metal material, and includes a substrate portion 21 that forms a disk having substantially the same diameter as the reel 1, and a plurality of positions in the circumferential direction of the substrate portion 21. A plurality of claw portions 22 extending in the axial direction from the outer peripheral edge, and the two side surfaces (circular surfaces perpendicular to the axial direction) of the substrate portion 21 are formed to project at the center position of the mounting surface to which the reel 1 is mounted. A cylindrical mounting shaft portion 23 and a plurality of drive pins 24 protruding from the mounting surface around the mounting shaft portion 23 are provided. A space formed between the claw portions 22 adjacent to each other in the circumferential direction is formed as a receiving portion 25 that receives the first flange piece 12A when the reel 1 is attached to the jig 2.

  The plurality of claw portions 22 are formed at equal intervals in the circumferential direction at positions corresponding to the first notches 12B of the reel 1. As shown in FIG. 3A, each claw portion 22 has a thin plate shape having an arc-shaped cross section on a plane perpendicular to the axial direction. Further, as is often seen in FIG. 3C, the claw portion 22 has a slightly smaller dimension in the circumferential direction than the dimension in the circumferential direction of the first notch 12B.

  The diameter of the mounting shaft portion 23 is substantially equal to the diameter of the mounting hole portion 15B of the inner shaft portion 15 of the reel 1, and when the reel 1 is attached to the jig 2, it can be seen in FIG. Next, the inner shaft portion of the reel 1 is fitted into the mounting hole portion 15B of the inner shaft portion 15 from the back surface (side surface on the side where the first flange portion 12 is positioned in the axial direction) side of the annular disk portion 14. 15 is rotatably supported.

  The plurality of drive pins 24 are positioned corresponding to the locking holes 14 </ b> A of the reel 1, and when the reel 1 is attached to the jig 2, as shown in FIG. Is inserted into the locking hole 14A from the back side. Therefore, when the jig 2 rotates, the drive pin 24 and the locking hole 14A are locked in the circumferential direction, so that the reel 1 is driven to rotate.

  Next, an operation for winding and holding the optical fiber F around the reel 1 will be described. First, the operator inserts the mounting shaft portion 23 and the drive pin 24 of the jig 2 provided in the winder into the mounting hole portion 15B and the locking hole 14A of the reel 1, respectively, and the reel 1 is attached to the jig. Attach to 2. As a result, as shown in FIG. 3 (B), the first flange piece 12A of the reel 1 is accommodated in the receiving portion 25 of the jig 2, and the claw portion 22 of the jig 2 has no first notch portion 12B. After passing through, the outer peripheral surface of the cylindrical portion 11 is externally fitted in the axial direction, and has a shape of a protruding portion intermittently positioned on the cylindrical portion 11 in the circumferential direction. That is, the outer peripheral surface of the cylindrical portion 11 of the reel 1 is at a position where it is sunk in the radial direction between the claw portions 22 of the jig 2 in the circumferential direction.

  Next, an operator pulls out one end portion of the optical fiber F wound around the bobbin as a start end side, and inserts it into one of the plurality of groove portions 11A provided in the reel 1 to connect the cylindrical portion 11 and the inner portion. It introduce | transduces in the annular space formed between the axial parts 15. FIG. Then, as shown in FIG. 4, the optical fiber F is disposed between the restricting projection 15A and the annular disk portion 14 in the axial direction so that at least one is provided on the outer peripheral surface of the inner shaft portion 15. Turn it around. Thus, by winding the optical fiber at least once, one end of the optical fiber F can be kept in the cylindrical portion 11. Further, since the movement of the optical fiber wound around the inner shaft portion 15 in the axial direction in the direction away from the annular disk portion 14 is restricted by the restricting protrusion 15A, the optical fiber F is moved in the axial direction to the inner shaft portion 15. Can be prevented from being inadvertently removed.

  Next, the reel 1 attached to the jig 2 is rotated by rotationally driving the jig 2 provided in the winder. As a result, the optical fiber F wound around the bobbin is drawn out, and the optical fiber F is wound around the outer peripheral surface of the cylindrical portion 11 of the reel 1. At this time, the optical fiber F is wound on the outer peripheral surface of the cylindrical portion 11 except for the position of the claw portion 22 of the jig 2 in the circumferential direction. It rises and is wound. Therefore, the optical fiber F is wound with a diameter larger than the diameter of the outer peripheral surface of the cylindrical portion 11 of the reel 1. Further, when the interval between the claw portions adjacent in the circumferential direction is narrow, the optical fiber F does not touch the outer peripheral surface of the cylindrical portion at the position between the claw portions, and the claw portion at the position of the claw portion. It will be rolled up by the thickness of.

  When the length of the optical fiber F wound around the cylindrical portion 11 reaches a predetermined length, the rotation drive of the jig 2 is stopped and the winding ends. The tension at the time of winding remains in the optical fiber F at the end of winding. However, since the claw portions 22 have a thin plate shape extending in the circumferential direction and are arranged at equal intervals in the circumferential direction, almost no local deformation occurs in the wound optical fiber F.

  Next, after cutting the optical fiber F, the reel 1 around which the optical fiber F is wound is removed from the jig 2 in the axial direction. As a result, the claw portion of the jig 2 is pulled out from the reel 1 in the axial direction, and the wound optical fiber F remains on the cylindrical outer peripheral surface of the cylindrical portion 11. When the reel 1 is removed from the jig 2 in this way, the wound optical fiber is uniformly loosened in the circumferential direction by the amount of the extracted claw, the tension is released, and local deformation of the optical fiber is not caused. It has not occurred. Therefore, since no undesirable influence is exerted on the characteristics of the optical fiber, it is possible to correctly measure and inspect the characteristics of the optical fiber under the winding condition.

  After removing the reel 1 from the jig 2, the optical fiber F is subjected to connector connection processing at each of the start end and the end end thereof, and then the connectors C1 and C2 incorporating semiconductors such as photoelectric elements are connected. In the present embodiment, a portion for holding the connector C1 connected to the starting end of the optical fiber F in the cylindrical portion 11 of the reel 1 is not particularly provided, but for example, on the side surface of the annular disc portion 14 By forming a holding portion for holding the connector C1, the connector C1 can be securely held in the cylindrical portion 11.

<Second embodiment>
The entire reel 1 according to the first embodiment is formed as a single member, but the reel according to the second embodiment is formed by combining two members divided in the axial direction. Different from form. The form of winding the optical fiber around the reel according to this embodiment is the same as in the first embodiment, and the optical fiber is wound by rotating the reel with the jig attached to the jig having the claw portion. The

  5A and 5B are perspective views showing the reel 3 according to the second embodiment, and FIG. 5A is a state where the two half-reel bodies 3A and 3B are separated from each other, FIG. ) Shows a state where the half reels 3A and 3B of FIG. As shown in FIG. 5B, the reel 3 according to the second embodiment is divided into two half-reel bodies divided by a plane perpendicular to the axial direction, that is, the first half-reel body 3A and the second half-reel body. It is made by combining the half reel body 3B. Each half-reel body 3A, 3B is obtained by integrally molding an electric insulating material. As with the reel 1 of the first embodiment, the reel 3 is configured such that an optical fiber is wound around the cylindrical outer peripheral surface of the cylindrical portion 31. The cylindrical portion 31 can be divided into a first cylindrical half portion 31-1 provided in the first half reel body 3A and a second cylindrical half portion 31-2 provided in the second half reel body 3B. Yes. Further, like the reel 1 of the first embodiment, an antistatic material layer is formed on the entire surface of the half reel bodies 3A and 3B by applying an antistatic material. Moreover, the half reel bodies 3A and 3B themselves may be configured by integral molding of an antistatic material (for example, an antistatic resin).

  The first half reel body 3 </ b> A includes the first cylindrical half portion 31-1, the first flange portion 32, the annular disc portion 34, and the inner shaft portion 35. In the first cylindrical half 31-1, the first screw hole half 36A for coupling with the second cylindrical half 31-2 penetrates in the axial direction at a plurality of positions at equal intervals in the circumferential direction. Is formed. The first flange portion 32 is formed of a first flange piece 32A and a first notch portion 32B as in the first flange portion 12 of the first embodiment. Moreover, although the locking hole like 1st embodiment is not shown by the annular disc part 14 of FIG. 5 (A), (B), the locking hole is actually formed. An attachment hole 35B for attachment to a jig is formed in the inner shaft part 35 so as to penetrate in the axial direction. In addition, the outer peripheral surface of the inner shaft portion 35 shown in FIGS. 5A and 5B is not provided with the restriction protrusion as in the first embodiment, but the light wound around the inner shaft portion 35. In order to prevent the fiber from coming off more reliably, the inner shaft portion 35 is preferably provided with a regulation protrusion.

  The second half reel body 3 </ b> B has the second cylindrical half portion 31-2 and the second flange portion 33 described above. In the second cylindrical half 31-2, a plurality of second screw hole halves 36B for coupling the second cylindrical half 31-1 to the first screw hole halves 36A of the first half reel body 3A. It is formed so as to penetrate in the axial direction at a corresponding position. When the half reel bodies 3A and 3B are coupled to each other, the first screw hole half 36A and the second screw hole half 36B communicate with each other to form one screw hole 36, and a screw (see FIG. (Not shown) can be screwed in.

  In the second cylindrical half portion 31-2, a groove portion 31A for introducing one end portion, which is the starting end side of the optical fiber, into the cylindrical portion 31 is formed as in the cylindrical portion 11 of the first embodiment. Moreover, the 2nd flange part 33 is formed with 32 A of 2nd flange pieces and the 2nd notch part 32B similarly to the 2nd flange part 13 of 1st embodiment.

  The reel 3 according to this embodiment is produced in the following manner. First, the first half reel body 3A and the second half reel body 3B are formed by integral molding of an electrical insulating material such as synthetic resin. Next, the side surfaces (surfaces perpendicular to the axial direction) of the first cylindrical half part 31-1 and the second cylindrical half part 31-2 are connected to the position of the first screw hole half part 36A and the second screw hole half part. The part 36B is brought into contact with the surface so that the position of the part 36B coincides in the circumferential direction. Next, a screw (not shown) as a coupling member to the screw hole 36 formed by the first screw hole half part 36A and the second screw hole half part 36B while maintaining the state where the side surfaces are in contact with each other. And the first cylindrical half part 31-1 and the second cylindrical half part 31-2 are joined together to complete the reel 3.

  Thus, in this embodiment, since two half reel bodies were joined together and one reel was completed, the freedom degree of the shape of a reel can be increased.

  In this embodiment, the half-reel bodies 3A and 3B are coupled to each other by screws. However, the coupling means is not limited to this. For example, the half-reel bodies 3A and 3B may be coupled to each other by welding or an adhesive. Good. Also, a hole and a protrusion that can be press-fitted into the hole are formed on the coupling surface (surfaces that contact each other) of the half reel bodies 3A and 3B, and the protrusion of one half reel body is a hole of the other half reel body. The half reel bodies 3A and 3B may be joined together by being press-fitted into the portion.

<Third embodiment>
In the second embodiment, the half-reel bodies 3A, 4A constituting the reel 3 are formed of members having different shapes. However, in this embodiment, the half-reel bodies constituting the reel are formed of members having the same shape. This is different from the second embodiment. The form of winding the optical fiber around the reel according to this embodiment is the same as in the first embodiment, and the optical fiber is wound by rotating the reel with the jig attached to the jig having the claw portion. The

  6 (A) and 6 (B) show the reel 4 according to the third embodiment, and FIG. 6 (A) is a perspective view showing a state where the two half-reel bodies 40 are separated, and FIG. 6 (B). FIG. 6A is a perspective view of a state in which the reels 4 are completed by joining the half-reel bodies 40 of FIG. 6A, and FIG. 6C is a cross-sectional view taken along the line IV-IV of FIG. The reel 4 according to the present embodiment is made by joining two half-reel bodies 40 having the same shape, which are symmetrical with respect to a plane perpendicular to the axial direction, in the axial direction. The half-reel body 40 omits the first flange piece 12A of the reel 1 of the first embodiment and can be seen in the axial direction of the cylindrical portion 11 as can be seen by comparing FIG. 6A with FIG. It is shaped like a smaller size.

  The half reel body 40 includes a cylindrical portion 41 formed with a cylindrical outer peripheral surface for winding and holding an optical fiber (not shown), and a radial direction from the inner diameter of the cylindrical portion 41 at one side end position of the cylindrical portion 41. An inwardly extending annular disc portion 44, a flange portion 42 provided at the other side end position in the axial direction, and the axial direction from the inner diameter of the annular disc portion 44 toward the other side end side. It has a cylindrical inner shaft portion 45 that extends. Further, like the reel 1 of the first embodiment, an antistatic material layer is formed on the entire surface of the reel 4 by applying an antistatic material. Further, the reel 4 itself may be constituted by integral molding of an antistatic material (for example, an antistatic resin).

  The flange portion 42 has a plurality of flange pieces 42A and a cutout portion 42B, like the second flange portion 13 of the first embodiment. At the other side end position of the cylindrical portion 41, the groove portion 41A that opens in the axial direction is provided in the cylindrical portion 41 within the circumferential range in which the cutout portion 42B is formed, like the groove portion 11A of the first embodiment. Is formed so as to penetrate through in the radial direction. The inner shaft portion 45 is formed with a restricting projection 45A that protrudes radially outward from the outer peripheral surface of the inner shaft portion 45 at a position corresponding to the notch portion 42B in the circumferential direction. The restricting projection 45A is provided at the other side end position of the inner shaft portion 45 in the axial direction, and restricts the movement of the optical fiber wound around the inner shaft portion 15 in the axial direction. The optical fiber is prevented from coming off from the inner shaft portion 45.

  An annular hole 44B is formed in the annular disc 44 so as to penetrate in the axial direction at the same position as the restricting projection 45A in the circumferential direction. Has been. Further, the annular disk portion 44 is formed with a screw hole half portion 46 for coupling the half reel body 40 penetrating in the axial direction at a plurality of positions having equal intervals in the circumferential direction. An attachment hole 45B for attachment to the jig is formed in the inner shaft part 45 so as to penetrate in the axial direction.

  The reel 4 according to the present embodiment is produced in the following manner. First, the half reel body 40 is formed by integral molding of an electrical insulating material such as synthetic resin. Next, the back surfaces (side surfaces on one side end) of the annular disk portions 44 of the two half-reel bodies 40 are brought into contact with each other. At this time, the flange piece 42A of one half-reel body 40 is positioned within the circumferential range of the notch 42B of the other half-reel body 40, and the positions of the screw hole halves 46 are matched. Next, while maintaining the state where the back surfaces are in contact with each other, a screw (not shown) as a coupling member is screwed into a screw hole formed by communicating the screw hole halves 46 with each other. The reels 4 are completed by joining the half-reel bodies 40 together.

  In this embodiment, since the two half reel bodies 40 are formed in the same shape, the number of molds for forming the half reel body 40 is different from the case where the half reel bodies have different shapes. And the mold can be miniaturized.

  In the present embodiment, the half-reel bodies 40 are coupled to each other by screws, but the coupling means is not limited to this. For example, the half-reel bodies 40 may be coupled to each other by welding or an adhesive. Further, for example, a hole portion and a protrusion having substantially the same diameter are formed on the back surface of the half reel body 40, and the protrusion of one half reel body 40 is press-fitted into the hole portion of the other half reel body. 40 may be combined. Further, for example, a projection that can be press-fitted into the extraction hole 44B is formed on the back surface of the half reel 40 at positions between the extraction holes 44B adjacent in the circumferential direction. The semi-reel bodies 40 may be coupled to each other by press-fitting the protrusions into the extraction hole 44 </ b> B of the other half-reel body 40.

1, 3, 4 Reel 13B, 33B Second notch 2 Jig 14, 34, 44 Annular disk 3A First half reel 14A, 44B Extraction hole (hole)
3B Second half reel body 14B Locking hole 11 Cylindrical portion 15, 35, 45 Inner shaft portion 11A, 31A, 41A Groove portion 15A, 45A Restriction protrusion 12, 32, 42 First flange portion 22 Claw portion 12A, 32A First flange Piece 24 Drive pin 12B, 32B Second cutout portion 40 Half reel body 13,33 Second flange portion 42A Flange piece 13A, 33A Second flange piece 42B Cutout portion

Claims (1)

In a reel having a cylindrical portion formed with a cylindrical outer peripheral surface for winding and holding an optical fiber, and flange portions provided at both side end positions in the axial direction of the cylindrical portion,
The flange portion is formed by a flange piece extending radially outward from the outer circumferential surface of the cylinder at a plurality of positions in the circumferential direction, and a notch portion between adjacent flange pieces in the circumferential direction. The flange piece at the position is located within the circumferential range of the notch at the other side end position,
The reel includes an annular disc portion extending radially inward from the inner diameter of the cylindrical portion, and a cylindrical inner shaft portion extending in the axial direction from the inner diameter of the annular disc portion toward the other side end. Have
The cylindrical portion has a groove portion that opens in the axial direction at the other side end position in a circumferential range in which the cutout portion is formed, and is formed to penetrate the cylindrical portion in the radial direction, thereby forming the groove portion. The inner wall surface of the groove facing in the circumferential direction has a convex curved surface,
The inner shaft portion is provided with a restricting projection protruding radially outward from the outer peripheral surface of the inner shaft portion at a position spaced apart from the annular disk portion in the axial direction. Reel for winding optical fiber.

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