CN2911281Y

CN2911281Y - Plastic expansion anchoring bolt assembly

Info

Publication number: CN2911281Y
Application number: CN 200620096804
Authority: CN
Inventors: 张恩琪; 张家斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-22
Filing date: 2006-05-22
Publication date: 2007-06-13
Anticipated expiration: 2016-05-22

Abstract

The utility model relates to plastic expansion anchor bolt components in particular to fastening product, belonging to the hardware production field. The model includes inner nails and outer expansion anchor bolts. The inner nails 1 is provided in the right middle position with multi-section conical steps 2 which match the multi-section lug boss 5 in the corresponding inner wall of the central hole 4 of the outer plastic expansion anchor bolts. The model is remarkably efficient, and the design of the multi-section conical steps and the multi-section lug boss realizes convenience for using the hammering method to enter the anchoring targets. And the mutual occlusion of the lug boss and the conical steps makes it impossible to reversely unscrew or pull out the nails. The model is labor-saving, time-efficient, safe and reliable.

Description

Plastic expansion crab-bolt assembly

Technical field

The utility model plastic expansion crab-bolt assembly belongs to the hardware field, is specifically related to Fastener products.

Background technique

The plastic expansion crab-bolt is widely used in all trades and professions as a kind of fastening piece.The plastic expansion crab-bolt of known extensive use is in the center hole of plastic expansion crab-bolt, inserts the threaded screw of corresponding specification, during use, with screw-driver or electric tool, the screw of screwing in the plastic expansion crab-bolt center hole makes the plastic expansion crab-bolt, expands and is anchored in the target.But existing this plastic expansion crab-bolt is deposited following two problems: one, because employing is screw, enter by screwing, and therefore just can withdraw from by oppositely screwing, there is loosening possibility; Its two, by screwing the mode of screw target approach, with regard to operation, time-consuming, effort, during field conduct, the operator is in order to increase work efficiency, accelerate job schedule, abandon screwing the mode of operation of screw often, but adopt the mode of entrance of direct hammering.So operation, though accelerated job schedule, and there is loosening possibility problem in unresolved screw.Therefore, the innovation of plastic expansion crab-bolt has very big development space.

The model utility content

The purpose of this utility model provides a kind of plastic expansion crab-bolt assembly, by the external structure of this assembly center iron nail and the respective inner structural design of the plastic expansion crab-bolt center hole that is mated, can make this expansion anchor adopt the mode of quick hammering iron nail to expand and be anchored in the target, and irreversible to withdrawing from.

The purpose of this utility model is achieved through the following technical solutions: this plastic expansion crab-bolt assembly is made up of inner iron nail and outer plastic expansion anchor, there is the conical stage 2 of more piece appropriate location, inner iron nail 1 middle part, and externally the corresponding site inwall of the center hole 4 of plastic expansion crab-bolt 3 has the more piece boss 5 that cooperates with the conical stage 2 corresponding suitable shapes of iron nail more piece.

Because the suitable shape more piece boss 5 on the center hole 4 corresponding site inwalls of conical stage 2 of the more piece of the appropriate location, inside iron nail 1 middle part of this plastic expansion crab-bolt assembly and outer plastic expansion anchor 3, corresponding suitable shape cooperates, therefore, when inner iron nail is subjected to hammer force target approach place, the outer plastic expansion anchor is expanded thereupon and be anchored at the target place, simultaneously, owing to the conical stage of the more piece of iron nail and because the mutual interlock of more piece boss of plastic expansion bolt center bore inner wall, constituted reverse withdraw from heavy of iron nail and stopped, thereby guaranteed that iron nail 1 can't directly extract or rotate and back-out from the target of anchoring.

The utility model obvious technical effects, this appropriate location, assembly iron nail nail pin middle part is the conical stage design of more piece, the plastic expansion bolt center bore inner wall of this assembly has the more piece boss structure that cooperates with the corresponding suitable shape of the conical stage of the more piece of iron nail, the not only convenient hammering mode rapid expanding that adopts, the anchoring target, and the more piece boss of plastic expansion bolt center bore inner wall, with the mutual interlock of more piece taper stage of iron nail, make nail irreversible to screwing out or extracting.Adopt this structure crab-bolt, not only the saving of labor, save time, laborsaving, and safe and reliable, irreversible to withdrawing from.

Description of drawings

Fig. 1 the utility model modular construction schematic representation.

The iron nail structural representation of Fig. 2 the utility model assembly.

The plastic expansion crab-bolt structural representation of Fig. 3 the utility model assembly.

Embodiment

How now further specify the utility model in conjunction with the accompanying drawings implements.

The utility model plastic expansion crab-bolt assembly alignment is desired anchoring target place, the ailhead of hammering iron nail 1, its outer plastic expansion anchor 3 expands immediately and is anchored in the anchoring target, fit between the more piece boss 5 of shape cooperation because center hole 4 inwalls of the conical stage 2 of the more piece of iron nail and the outer plastic expansion anchor 3 that is cooperated are corresponding, interlock mutually, therefore constituted iron nail 1 and stopped, thereby guaranteed that iron nail 1 can't directly extract or rotate and back-out from the target of anchoring from reverse withdraw from heavy of anchoring target.

The utility model plastic expansion crab-bolt assembly, but the plastic expansion crab-bolt component series product of processing and fabricating different size.To satisfy the demand of different operating modes.

Claims

1, plastic expansion crab-bolt assembly, form by inner iron nail and outer plastic expansion anchor, it is characterized in that inner iron nail 1 has the conical stage 2 of more piece, externally the corresponding site inwall of the center hole 4 of plastic expansion crab-bolt 3 has the more piece boss 5 that cooperates with the conical stage 2 corresponding suitable shapes of iron nail more piece.