Anti-fall-off fixing pin structure for expansion joint support pipe of formwork

Abstract

This invention relates to an anti-detachment fixing pin structure for a formwork support telescopic steel pipe. It comprises a support telescopic steel pipe assembly and an anti-detachment fixing pin. The support telescopic steel pipe assembly includes an outer sleeve, an inner sleeve, and an adjusting support ring. The outer sleeve has through holes on both sides, while the inner sleeve has positioning holes spaced apart on both sides. The outer sleeve and inner sleeve are fitted together, with the through holes of the outer sleeve corresponding to the positioning holes of the inner sleeve. The adjusting support ring is adjustable. The anti-detachment fixing pin is mounted on the outer tube body. One side of the anti-detachment fixing pin is supported by the adjusting support ring and is fitted onto the outer tube body in a way that allows for up and down movement and slight angular adjustment without falling off. The other side of the anti-detachment fixing pin is inserted and fixed into the through hole and positioning hole, so that the anti-detachment fixing pin is fixed on the supporting telescopic steel pipe assembly without falling off, preventing it from falling off and being lost and unable to be reused. It can also be quickly inserted and fixed after the height of the supporting telescopic steel pipe assembly is adjusted, so as to achieve the functions of structural functionality and reusability.

Claims

1. A fixing pin structure for preventing the slippage of a telescopic steel pipe supporting a formwork, comprising: A telescopic steel pipe assembly is provided, comprising an outer sleeve and an inner sleeve. The outer sleeve has a through hole on each side, while the inner sleeve has several positioning holes spaced apart on each side. The outer sleeve and the inner sleeve are fitted together, with the through holes of the outer sleeve corresponding to the positioning holes of the inner sleeve. The assembly is characterized by further comprising an anti-detachment fixing pin, which integrally comprises a pin section, a connecting section, and a hook section. An opening section is provided between the pin section and the hook section, and the opening distance between the pin section and the hook section is less than the diameter of the inner sleeve of the telescopic steel pipe assembly. The telescopic steel pipe assembly further includes an adjusting support ring, and the outer surface of the outer sleeve is provided with a threaded locking adjustment section around the through hole. The adjusting support ring is adjustable and screwed into the threaded locking adjustment section of the outer sleeve. The hook section of the anti-detachment fixing pin is movable up and down and can be slightly adjusted in angle, fitting into the threaded locking adjustment section of the outer sleeve without falling off. The hook section is limited and supported relative to the adjusting support ring. When the through hole of the outer sleeve is adjusted relative to the positioning hole of the inner sleeve, the pin section of the anti-detachment fixing pin is inserted and fixed in the through hole and the positioning hole.

2. The anti-detachment fixing pin structure for the formwork support telescopic steel pipe as described in claim 1, wherein, The through-holes of the outer sleeve are elongated, corresponding to the positioning holes of the inner sleeve.

3. The anti-detachment fixing pin structure for the formwork support telescopic steel pipe as described in claim 1 or 2, wherein, The pin section and the hook section of the anti-detachment fixing pin are connected by an upward bend at an inward angle of 100° to 150°.

4. The anti-detachment fixing pin structure for the formwork support telescopic steel pipe as described in claim 3, wherein, The inner diameter of the ring hook section is equal to the diameter of the outer sleeve of the supporting telescopic steel pipe assembly, so that the ring hook section fits onto the outer sleeve of the supporting telescopic steel pipe assembly.

5. The anti-detachment fixing pin structure for the formwork support telescopic steel pipe as described in claim 3, wherein, The inner diameter of the hook section is larger than the diameter of the outer sleeve of the supporting telescopic steel pipe assembly, so that the hook section fits onto the outer sleeve of the supporting telescopic steel pipe assembly.

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