Coating removal blade, removal blade unit and optical fiber coating removal apparatus

Patent metadata

Field	Value
Publication number	US-10514505-B2
Application number	US-201715543767-A
Country	US
Kind code	B2
Filing date	Mar 6, 2017
Priority date	Feb 20, 2017
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

A coating removal blade used in an optical fiber coating removal apparatus that removes a coating material of an optical fiber includes a blade tip that is pressed against the coating material from a radial direction of an optical fiber bare wire of the optical fiber, and a pressing surface against which the coating material to be pulled out from the optical fiber is pressed in a longitudinal direction of the optical fiber. The pressing surface includes an inclined surface that is inclined at a constant angle to extend in a direction opposite to a pulling-out direction of the optical fiber as a distance from the blade tip in the radial direction of the optical fiber bare wire increases, and an inclination angle of the inclined surface with respect to the pulling-out direction of the optical fiber is larger than 0° and equal to or smaller than 60°.

First claim

The invention claimed is:

1. A coating removal blade used in an optical fiber coating removal apparatus that removes a coating material of an optical fiber, comprising:
a blade tip that is pressed against the coating material from a radial direction of an optical fiber bare wire of the optical fiber; and
a pressing surface against which the coating material to be pulled out from the optical fiber is pressed in a longitudinal direction of the optical fiber, wherein
the pressing surface includes:
an inclined surface that is inclined at a constant angle to extend in a direction opposite to a pulling-out direction of the optical fiber as a distance from the blade tip in the radial direction of the optical fiber bare wire increases; and
a hook surface formed between the inclined surface and the blade tip,

an inclination angle of the inclined surface with respect to the pulling-out direction of the optical fiber is larger than 0° and equal to or smaller than 60°,
the hook surface is orthogonal to the pulling-out direction of the optical fiber or inclined to extend in the direction opposite to the pulling-out direction of the optical fiber as a distance to the blade tip from the inclined surface in the radial direction of the optical fiber bare wire decreases, and
both the hook surface and the inclined surface press against the coating material during removal of the coating material from the optical fiber.

2. The coating removal blade according to claim 1 , further comprising a first blade-divided body that includes the inclined surface, and a second blade-divided body that includes the hook surface and the blade tip, wherein the first blade-divided body and the second blade-divided body are sequentially arranged in the pulling-out direction.

3. The coating removal blade according to claim 1 , wherein a recess portion recessed in the pulling-out direction is formed between the inclined surface and the hook surface of the pressing surface.

4. The coating removal blade according to claim 1 , wherein
the inclined surface is formed on an inner surface of a rotating body having the pulling-out direction as an axis, and
an inner diameter of the inner surface of the rotating body increases toward the direction opposite to the pulling-out direction from the blade tip.

5. A removal blade unit comprising a pair of the coating removal blades according to claim 1 , wherein the inclined surfaces of the pair of coating removal blades face each other in an arrangement direction of the pair of coating removal blades while the optical fiber is sandwiched between the pair of coating removal blades from the radial direction of the optical fiber bare wire and an interval between the inclined surfaces of the pair of coating removal blades gradually decreases toward the pulling-out direction of the optical fiber.

6. The removal blade unit according to claim 5 , wherein the inclination angles of the inclined surfaces of the pair of coating removal blades are equal.

7. An optical fiber coating removal apparatus comprising the removal blade unit according to claim 5 .

8. An optical fiber coating removal apparatus comprising the coating removal blade according to claim 1 .

Assignees

• Fujikura Ltd

Inventors

• SAKANISHI Sanga
• Kawanishi Noriyuki

Classifications

• B26D7/02

  with clamping means {(B26D7/018 takes precedence)} · CPC title

• B26D3/28 Primary

  Splitting layers from work; Mutually separating layers by cutting (B26D3/30 takes precedence; Recovery of plastics or other constituents of waste material containing plastics B29B17/00) · CPC title

• B26D7/10

  by heating (with Laser B23K26/00; severing by heating B26F) · CPC title

• B26D2007/013

  the work being tubes, rods or logs · CPC title

• G02B6/245 Primary

  Removing protective coverings of light guides before coupling · CPC title