Method for fixing object and expansion bolt and special borer for method

A technology for expansion bolts and objects, which is applied in drilling equipment and methods, connecting components, earth-moving drilling, etc., can solve problems such as safety accidents, objects falling off, and expansion bolts are not recommended, so as to avoid accidents, prevent objects from falling, The effect of improving the anti-shedding performance

Inactive Publication Date: 2012-10-24
赵群燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the load is large or it is used in a place with vibration, a small amount of sliding friction will occur between the expansion sleeve and the hole wall of the concrete 9. As time accumulates, the s

Method used

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  • Method for fixing object and expansion bolt and special borer for method
  • Method for fixing object and expansion bolt and special borer for method
  • Method for fixing object and expansion bolt and special borer for method

Examples

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Example Embodiment

[0036] The expansion bolt of the present invention is composed of a nut 1, a spring washer 2, a flat washer 3, an expansion sleeve 4, and a screw 5. The diameter of the screw tail 51 is larger than the diameter of the screw shaft and is substantially equal to the outer diameter of the expansion sleeve 4. Expansion sleeve 4 is made of round steel pipe. The thickness of the pipe wall is greater than that of the traditional iron expansion sleeve. Its tail is cut into 10 petals 41 by a sawing machine. The junction of the screw tail 51 and the screw shaft is at a right angle. The side facing the expansion sleeve is made into a curved chamfer 52, such as image 3 Shown. When the nut 1 is tightened, the arcuate chamfer 52 at the end of the screw first expands the petals, and then applies axial squeezing force to the petals to force the petals to bend toward a right angle. When the screw retreats a sufficient distance, each petal Bend outwards to form a flange, such as Figure 4 Shown....

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Abstract

The invention relates to a method for reserving a hole on a wall to fix an object and an expansion bolt and a special borer for the method. The method mainly includes: drilling a blind hole according to a traditional method; boring a expansion hole which has larger diameter than the blind hole at the bottom of the blind hole with the special borer so as to form a stepped face; inserting the expansion bolt into the blind hole; mounting the object to be fixed; and sleeving a washer and tightening a nut with a wrench. During the tightening process, a lamina at the tail of an expansion sleeve is pressed by the bolt tail to curve outwardly so as to form a turnup clamping to the stepped face. Due to the fact that slide static friction force generated by radial extrusion force between the lamina at the tail of the expansion sleeve and concrete is changed into axial clamping force of the lamina to the concrete, anti-off performance and safety performance of the expansion bolt is improved. The method is suitable for fixing heavy and vibrative objects such as a high-power air-conditioning outdoor unit, a ceiling fan, and supports of large billboards.

Description

technical field [0001] The invention relates to a method for making wall holes and fixing objects on materials such as concrete and bricks of a building, and expansion bolts and special boring tools used in conjunction with the method, which are suitable for use on the ground, top wall or side wall of a building Used for fixed objects. Background technique [0002] The existing methods for fixing objects on the ground, ceiling or side walls of buildings usually adopt such as figure 1 The traditional expansion bolt shown is composed of a nut 1, a spring washer 2, a flat washer 3, an expansion sleeve 4 and a screw rod 5. The tail of the expansion sleeve 4 is open, and the screw shaft and the screw tail 51 are transitionally connected by a cone. During use, the afterbody of expansion bolt is stretched forward in the pre-drilled wall hole, after installing the object that needs to be fixed, then put on spring washer 2, flat washer 3 and fasten with nut 1. When the nut 1 is tig...

Claims

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Application Information

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IPC IPC(8): E21B7/28F16B13/06
Inventor 赵群燕
Owner 赵群燕
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