| 主权项 |
1. An optical-fiber-spliced portion reinforcing heating device comprising:
a pair of clamps that respectively grasp one portion and the other portion of a coated portion of an optical fiber, the optical fiber including a fusion-spliced portion, the fusion-spliced portion being coated with a sleeve, the coated portion being exposed from the sleeve; at least two or more heaters that are arranged to face each other so as to sandwich the sleeve; a first force-applying member that presses at least one of the paired clamps so as to apply a tension to the optical fiber; and a second force-applying member that applies a pressing force to at least one or more of the heaters via the sleeve by use of one of an elastic member and a magnetic member in accordance with control of a drive source, the heaters being arranged to face each other with the sleeve interposed therebetween, wherein a pressing force that is to be applied to the sleeve by the second force-applying member is set to be greater than a tension that is to be applied to the optical fiber by the first force-applying member, before the optical fiber is grasped, in a state in which one of the clamps is separated from heaters by the first force-applying member and in a state in which the paired clamps grasp the optical fiber and a tension is not applied to the optical fiber, the heaters press the sleeve by a pressing force by the second force-applying member, as a result of moving the optical fiber in a pressing direction which is due to movement of the sleeve or deformation of the sleeve after starting of the press, one of the clamps is drawn to a forward movement direction by a tension due to movement of the optical fiber, one of the clamps is configured so as to be stopped at a position away from an end of a movable range, therefore, in a state in which a tension is applied to the optical fiber, in one of the clamps, a backward movable range in a direction away from the heaters in the longitudinal direction of the optical fiber is ensured and a forward movable range that allows movement to the heater side is ensured, and one of the clamps is thereby configured to move in a direction in which a tension that is applied to the optical fiber as a result of pressing the sleeve by the heaters and by the second force-applying member is diminished. |
