| 摘要 |
PURPOSE:To facilitate the fixing of a porous bridge to an upper support frame by making it possible to easily and certainly fusing the porous bridge onto the upper support frame, by forming a projection onto the upper support frame of an ion activity measuring instrument and fixing the porous bridge by said projection. CONSTITUTION:A fusion head 100 comprises a body 1 having two leading end parts 2 contacted with a thermoplastic material and depression parts 3 for forming projections to the thermoplastic material are provided to the leading end parts 2 and fusion energy is supplied to the leading end parts 2 from a screw 4. A porous bridge 50 is arranged so as to interpose a spot fusion bonding hole 41 for the spot fusion bonding of a reference solution of which the ion activity is known and the spot fusion bonding hole 42 for the spot fusion bonding of a specimen of which the ion activity is unknown. The leading end parts 2 of the fusion head 100 connected to a fusion energy source are contacted with both end parts of the porous bridge 50 and a support frame 40 and projections are formed to the support frame 40 and, at the same time, both end parts of the porous bridge 50 are fused and fixed to said projections. |
