Step-by-step tightening-type template limiting fastener
A technology of step-by-step tightening and formwork, which is applied to the joints of formwork/formwork/work frame, the preparation of building components on site, and construction, which can solve the problems of easy loss and easy fall of step-by-step tightening devices, so as to prevent Drop and lose, solve the effect of easy falling, and facilitate centralized collection and storage
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[0025] Examples of step-by-step formwork limit fasteners, such as Figure 1-6 As shown, the limit fastener in this embodiment is composed of a support sleeve 101 and an expansion block 102 . The support sleeve 101 includes a locking part 11 and a sliding sleeve part 12, wherein the cross section of the sliding sleeve part 12 is C-shaped, and the cross-section of the locking part 11 is U-shaped, and the locking part 11 and the sliding sleeve part 12 are arranged mouth to mouth. The U-shaped groove surrounded by the locking part 11 is a through groove through up and down, and the through groove forms a lock groove 13. The groove bottom surface of the lock groove 13 is a slope that gradually inclines toward the inner side of the support sleeve from back to front; in addition, the sliding sleeve The front end of the part 12 is provided with a side wing 14 for pressing the corresponding formwork forward, and the side wing 14 protrudes toward the radial periphery of the support slee...
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