To provide a screw member fastening method for simply and uniformly fastening four screws in assembling a fluid control device.
This screw member fastening method includes: a preliminary fastening step of manually fastening four screw members, respectively; a primary final fastening step of fastening two screw members of four screw members at the same time until each screw member reaches a designated torque by a torque limiter type biaxial fastening tool; a secondary final fastening step of fastening two remaining screw members at the same time until each screw member reaches a designated torque by a torque limiter type biaxial fastening tool; and an increasingly fastening the two screw members fastened in the primary final fastening step at the same time until each screw member reaches designated torque by a torque limiter type biaxial fastening tool.
| JPH03221379 | POWER DRIVER |
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| JP3118580 | Attachment for chipping |
HOSHIYAMA SHIYUUEI
YASUMOTO TADASHI
OMI TADAHIRO
Einosuke Kishimoto
Akira Watanabe
Kiyosue Yasuko