Japanese Direct4K & Direct8K fastening tshuab
Txij li thaum xyoo 1960, Nyiv pib kawm tsis yog ballasted khiav. Japanese Direct4 & Direct8 fastening tshuab tau muab tso rau hauv kev siv. Tam sim no, lub ntsiab hom fastening systems yog cov txhim kho Direct4K & Direct8K fastening systems.
Direct8K fastening system yog cov qauv sib cais nrog cov hlua khi. Lub pre-embedded yas dowel yog siv rau ntawm lub sleeper es tsis txhob hlau dowel. Ntawm lub khi phaj muaj cov oval qhov qhib rau kev kho qhov ntsuas qhov deb los ntawm kev txav khi phaj. Kev hloov kho qhov ntsuas yog ± 10mm. Los ntawm rail ncoo, khi phaj thiab kho hauv ob sab phlu, qhov siab hloov ntau yam yog los ntawm 0 mus rau 70mm.
Direct4K fastening system yog cov qauv ntawm ib txheej elastic tsis khi phaj, uas cov hniav ncaj nraim clamps ntawm txoj kev tsheb ciav hlau. Raws li cov bolts tsis nruj txaus, tsuas yog qis-ceg ntawm cov hniav clamps ntawm kev tsheb nqaj hlau; raws li nruj txaus, sab sauv ceg kuj clamps ntawm kev tsheb nqaj hlau. Qhov ntau ntawm kev hloov qhov siab yog los ntawm 0mm-10mm, ntsuas qhov ntsuas qhov siab yog ± 10mm.
Qhov Kev Txhim Kho Direct4K fastening system txais cov tee hexagon bolts thiab spherical washer thiab ob chav lawj hloov kho ncoo. Kev hloov kho ntau yam ntawm qhov system yog los ntawm 0mm-50mm, ntsuas kev hloov kho yog ± 10mm.