Patent ID: 8662437

Claim:
A wire bobbin holder of a bobbin cassette in a wiring apparatus, which is mounted on the bobbin cassette in the wiring apparatus and holds a wire bobbin round which a current collecting wire is wound when the current collecting wire is laid in parallel on a solar cell on which a photosensitive film is formed, comprising: a bobbin holder shaft pivotally held on a holder fixed to a frame of the bobbin cassette, the wire bobbin being detachably attached to the bobbin holder shaft; and a wire tension adjusting mechanism for adjusting tension of the current collecting wire to be drawn out from the wire bobbin, the wire tension adjusting mechanism including: a non-contact winding diameter sensor for detecting a winding diameter of the current collecting wire wound round the wire bobbin, a detecting face of the winding diameter sensor being arranged so as to catch an outer circumferential face of the current collecting wire wound round the wire bobbin; a brake shoe capable of coming into contact with an end face of the bobbin holder shaft through a friction contacting member; an air cylinder for pushing the brake shoe toward the end face of the bobbin holder shaft, the air cylinder fixed to a supporting frame surrounding the holder; and an electropneumatic regulator for regulating a pushing force of the air cylinder according to a detection signal sent from the non-contact winding diameter sensor, wherein a braking force with respect to the bobbin holder shaft is adjusted with the electropneumatic regulator operating to regulate the pushing force according to the winding diameter of the current collecting wire wound round the wire bobbin.