JP2015107842A - Bobbin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bobbin capable of saving the weight and retaining strength against a torsional stress.SOLUTION: A bobbin 10 has at least its trunk part 2 and flange part 4 made of resin members and its main shaft 1 made of a metal, and a metallic flange 5 is jointed to the end part of this main shaft 1, so that torque at the time of stopping the rotation around the main shaft 1 is received by the flange 5. It is preferred that the flange 5 and the main shaft 1 are jointed by involute serration or welding.

Description

  The present invention relates to a bobbin.

  Conventionally, a bobbin is used to wind up or send out an optical fiber in an optical fiber manufacturing process or inspection process. The communication optical fiber is usually wound around a bobbin and then subjected to various measurements and inspections such as transmission loss measurement and proof test for quality assurance. The proof test confirms that no disconnection occurs even when a strong tension is applied to guarantee the strength of the optical fiber.

  Conventional bobbins are generally made entirely of metal or entirely made of resin. As another bobbin, Non-Patent Document 1 describes a bobbin in which a metal pipe is used as a core material, and a body part and a collar part are assembled with a resin molded product on the outside. The collar part is provided in the both sides of the axial direction. The shape of the flange portion is a so-called reverse taper type in which the interval between the flange portions increases toward the outside in the radial direction. Each flange has slits at two locations. A reinforcing rib is formed on the back side of the collar portion. The collar portion is fixed to both ends of the core pipe by tightening with metal nuts.

"Spools & Reels", [online], [October 3, 2013 search], Internet <URL: http: // www. sonoco-plastics. nl / site / product / spools_reels. html>

  Bobbins used for winding and delivery may require a sudden stop. For example, when a proof test of an optical fiber has a portion with low strength, the portion breaks. If the bobbin that is being wound is not suddenly stopped, the end of the broken optical fiber may hit the optical fiber wound around the bobbin, and the optical fiber may be damaged or broken (so-called scratch).

  When the bobbin is suddenly stopped, the brake provided in the equipment for rotating the bobbin is operated. The brake is attached to one side or both sides in the axial direction of the bobbin. In order to apply the braking force to the bobbin, the shaft that rotates the bobbin has two pins called kelepins (anti-rotation members). There is a stop hole). The force of the brake is transmitted to the bobbin when the side surface of the pin pin hits the side surface of the pin hole.

  When the brake is provided on one side of the bobbin, when the brake is operated, the hook on the side where the brake is located stops immediately when the pin pin hits the hole, but the hook on the other side rotates for a while due to inertia. The bobbin is subjected to torsional stress as it tries to continue. Even when the brakes are provided on both sides of the bobbin, if there is a time difference in the operation of the brake, the bobbin is subjected to torsional stress. If the periphery of the kerf hole is weak, the collar may be damaged due to torsional stress. Even if the hole has withstood the torsional stress, the torsional stress may be transmitted to the buttocks and the trunk, and the buttocks and the trunk may be deformed.

  If the bobbin is entirely made of metal, the strength is high, but the weight and inertia force increase, and in order to rotate and enlarge the bobbin at high speed, the scale of the rotary drive device becomes large and the configuration is complicated. become. If it is made of resin, the strength is insufficient, and there is a risk of destruction due to torsional stress during a sudden stop.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the bobbin which can be reduced in weight and can ensure the intensity | strength with respect to a torsional stress.

In order to solve the above-mentioned problems, the present invention has at least a body part and a flange part made of a resin member, the main shaft is made of metal, and a metal flange is coupled to the end of the main shaft, Provided is a bobbin configured to receive torque at the time of stopping rotation by the flange.
It is preferable that the flange and the main shaft are coupled by involute serration or welding.

  According to the present invention, the strength against torsional stress can be ensured by receiving the torque at the time of stopping rotation with the metal flange, and further, the weight can be reduced by configuring at least the body part and the collar part with the resin member. Is possible.

It is a perspective view which shows an example of the bobbin of this invention. It is sectional drawing which shows an example of the bobbin of this invention.

Hereinafter, based on a preferred embodiment, the present invention will be described with reference to the drawings.
1 and 2 show an example of the bobbin of the present invention. In FIG. 1, in order to illustrate the internal structure of the bobbin 10, a part of the collar portion 4 or the like is cut out on the front side of the sheet. FIG. 2 shows a cross section of the bobbin 10 along a plane including the center of the main shaft and the center of the hole.

  The bobbin 10 includes a body portion 2 around which a linear body (not shown) such as an optical fiber is wound, and a pair of flange portions 4 and 4 that hold the linear body wound around the body portion 2 around the main shaft 1. Have. In FIG. 1, the flange parts 4, 4 are of a so-called reverse taper type in which the distance between the flange parts 4, 4 increases toward the outside in the radial direction. In addition, a collar part may be parallel.

Between the main shaft 1 and the body 2, one or more supports 3 can be provided in order to support the pressure when the linear body is wound around the body 2.
The resin molding part of the bobbin 10 can also be molded by molding one of the flange parts 4 and half of the body part 2 with one resin member and connecting the two resin members in the longitudinal direction. In this case, it is preferable to provide the support 3 at the joining portion of the resin member in the body portion 2 because the joining portion of the resin member can be reinforced by the support 3. In FIG. 1, the body 2 and the support 3 are joined to the outer diameter portion (outer surface) of the main shaft 1 and are concentric with the main shaft 1.

In the present embodiment, the main shaft 1 is made of metal, and at least the body portion 2 and the flange portions 4 and 4 are made of a resin member. The support 3 may be made of metal or resin, but it is preferable that the support 3 is also made of a resin member because the weight is further reduced.
In the bobbin 10, the member having a large distance from the center in the radial direction of the main shaft 1 is made of a resin member having a small specific gravity, thereby reducing the rotational moment of the bobbin as compared with the case where all are made of metal. Can do. As a result, even if the bobbin is rotated at a high speed or increased in size, it is not necessary to increase the size of the rotary drive device, resulting in energy saving.

  A metal flange 5 is coupled to the end of the main shaft 1. Since the flange 5 receives torque at the time of stopping rotation around the main shaft 1, the flange 5 has an opening 5 a. A brake force is transmitted to the bobbin 10 by the side surface of the pin pin being in contact with the side surface of the pin hole 5a. Since the torque is received by the metal flange 5, the strength against torsional stress can be ensured, and the bobbin can be prevented from being broken or the hole being damaged when the brake is stopped suddenly by the brake. There is no particular limitation on the shape of the hole 5a as long as it can receive torque from the pin, and various shapes such as a circle, a rectangle, a fan, and a triangle can be used.

  In FIG. 2, flanges 5 and 5 are provided at both ends of the main shaft 1. When brakes are provided on both axial sides of the bobbin 10, it is preferable to provide flanges 5 and 5 at both ends of the main shaft 1 and receive the torque applied from both brakes by the metal flange 5. Of course, even when the brake is provided only on one side of the bobbin 10, it is possible to use the bobbin 10 provided with the flanges 5 having the cut holes 5a at both ends of the main shaft 1, respectively.

  When the brake is provided only on one side of the bobbin 10, the metal flange may be provided only on one side having the brake. Alternatively, the flange 5 may be provided on both sides of the main shaft 1 and the kerf hole 5a may be provided only in the flange 5 on the brake side. By providing and fixing the flanges 5 on both sides of the main shaft 1, the resin body 2 and the flange 4 can be securely held.

  The main shaft 1 may be a pipe or a rod, but a pipe (pipe) is preferable for weight reduction. If the metal which comprises the main axis | shaft 1 has moderate intensity | strength, a lightweight (low density) metal is preferable and an inexpensive metal is more preferable. Although it does not specifically limit, For example, aluminum and aluminum alloy are mentioned. An end portion of the main shaft 1, for example, an inner diameter portion (inner surface) of the pipe is subjected to processing (not shown) for connection with a driving device.

  The flange 5 is a disk-shaped metal member, for example. If the metal which comprises the flange 5 has moderate intensity | strength, a lightweight (low density) metal is preferable and an inexpensive metal is more preferable. Although it does not specifically limit, For example, aluminum and aluminum alloy are mentioned.

  The flange 5 and the main shaft 1 are coupled to each other with sufficient accuracy. Examples of means for connecting the flange 5 and the main shaft 1 include serration and welding. The involute serration 6 is preferable because it can be easily processed into the main shaft 1 and the shape of the binding site is hardly distorted.

  In the present embodiment, a screw 8 is formed at the tip of the main shaft 1, and the nut 7 can be tightened. Involute serrations are formed in the outer diameter portion of the main shaft 1 and the inner diameter portion of the flange 5 so as to correspond to each other. Involute serration can be designed according to, for example, JIS B 1602 (which is now obsolete).

  For example, the following method can be used for the involute serration meshing procedure. First, the flange 5 and the nut 7 are arranged at the end of the main shaft 1. At this time, the nut 7 is overlapped on the outside of the flange 5. When the nut 7 is rotated in this state, the nut 7 is fed inward in the axial direction of the main shaft 1 along the screw 8. The flange 5 is gradually pushed in (moved inward) by the pressure received from the nut 7, and the serrations are engaged.

  In order to wind up a linear body such as an optical fiber by the bobbin 10, for example, the end of the main shaft 1 is connected to a drive device, and the bobbin 10 is rotated according to the rotation of the drive device. The method of stopping the rotation of the bobbin 10 may be a method of stopping the rotation of the driving device when the filament is not broken, for example, when a sufficient length is wound up. When the rotation of the bobbin 10 is stopped by disconnection of the wire rod, the wire rod is suddenly stopped by a brake in order to prevent damage due to the crack, and the end portion of the broken wire rod is wound around the bobbin 10. Prevent contact with the body.

  When the torque from the brake is received by the slit hole 5a of the flange 5, the torque is transmitted to the main shaft 1 and the entire bobbin 10 can be quickly stopped. The flange 5 and the side surface of the body portion 2 (the surface continuing to the flange portion 4) are in contact with each other, but are not joined. Moreover, in order to avoid that the pin pin arrange | positioned at the crack hole 5a contacts the trunk | drum 2 (or collar part 4), the hole 2a larger than the tear hole 5a is provided in the trunk | drum 2 (or collar part 4). Thereby, the trunk | drum 2 and the collar part 4 do not receive a torque directly from a kele pin. That is, the torque when stopping the rotation of the bobbin 10 is received by the flange 5 from the pin pin and further transmitted to the main shaft 1 and then to the resin member such as the body 2 and the flange 4 so that it stops suddenly. The resin member is not directly subjected to the sudden load of time.

  As mentioned above, although this invention has been demonstrated based on suitable embodiment, this invention is not limited to the above-mentioned embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  The linear body wound around the bobbin is not limited to an optical fiber, but includes various linear bodies such as a thread, a fiber, a cord, a cable, and a wire. When used to wind an optical fiber having one or more resin coatings around a bare glass optical fiber, the winding is suddenly interrupted when the optical fiber is broken in the manufacturing process or inspection process. Since it may stop, it is especially suitable.

  Although the resin member which comprises a bobbin is not specifically limited, For example, engineering plastics, such as ABS (acrylonitrile butadiene styrene copolymer) resin, a fiber reinforced plastic (FRP), etc. are mentioned. The resin member may be a combination of two or more members. Although it does not specifically limit as a joining method of a resin member, An adhesive agent, welding, etc. are mentioned.

DESCRIPTION OF SYMBOLS 1 ... Main axis | shaft, 2 ... Body part, 2a ... Hole, 3 ... Support, 4 ... Gutter part, 5 ... Flange, 5a ... Kellet hole, 6 ... Involute serration, 7 ... Nut, 8 ... Screw, 10 ... Bobbin.

Claims (2)

  At least the body part and the collar part are made of a resin member, the main shaft is made of metal, a metal flange is coupled to the end of the main shaft, and torque when stopping rotation around the main shaft is generated by the flange. A bobbin characterized by being configured to receive.   The bobbin according to claim 1, wherein the flange and the main shaft are coupled by involute serration or welding.

Images