I/We Claim:
1. An optical fiber fusion-splicer which fusion-splices at least a pair of optical
fibers, comprising:
a pair of electrode rod units of which pointed end portions are disposed to face each other with abutting portions of the optical fibers interposed therebetween; and
a pair of mounting bases which respectively support the electrode rod units, wherein
each of the electrode rod units includes:
an electrode rod which fusion-splices the optical fibers by discharge heating: and
a main heat dissipation member provided to protrude from an outer circumferential surface of the electrode rod,
each of the mounting bases supports a position closer to a base end side than a pointed end portion of the electrode rod, and
the main heat dissipation member is provided in contact with the outer circumferential surface of the electrode rod over a circumferential direction between the pointed end portion of the electrode rod and a support position of the electrode rod supported by the mounting base.
2. The optical fiber fusion-splicer according to claim 1, wherein the main heat dissipation member is formed of a metal.
3. The optical fiber fusion-splicer according to claim 1 or 2, wherein irregularities are formed on a surface of the main heat dissipation member.

4. The optical fiber fusion-splicer according to any one of claims 1 to 3, wherein
an auxiliary heat dissipation member is provided on the outer circumferential
surface of the electrode rod, and
the auxiliary heat dissipation member is provided in contact with the outer circumferential surface of the electrode rod over the circumferential direction on a side closer to a base end than the support position of the electrode rod supported by the mounting base.
5. The optical fiber fusion-splicer according to claim 4, wherein
the main heat dissipation member and the auxiliary heat dissipation member are formed to be integrally connected with a connecting portion interposed therebetween.
6. An electrode rod unit used for an optical fiber fusion-splicer according to claim
4, the electrode rod unit comprising:
a main heat dissipation member and an auxiliary heat dissipation member formed to be integrally connected with a connecting portion interposed therebetween.