CN2211473Y

CN2211473Y - Special fastener for screw bolt and match board for construction

Info

Publication number: CN2211473Y
Application number: CN 94244679
Authority: CN
Inventors: 申宗海
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-15
Filing date: 1994-11-15
Publication date: 1995-11-01
Anticipated expiration: 2004-11-15

Abstract

The utility model which relates to a special fastener for screw bolts and match boards is used in a construction work; the utility model is especially suitable for fastening and fabricating concrete components. The utility model is characterized in that the two ends of a through screw thread threaded rod are screwed with profile nuts, the screw thread of the threaded rod presents coarse pitch, short tooth and big spiral angle, and a dummy club structure is arranged on the extending arm of the side face of each of the profile nuts. The utility model has the advantages of strong reliability and high work efficiency; besides, the assembly and the disassembly of the profile nuts are quick and convenient, and the utility model is especially suitable for the overhead operation of building industry.

Description

Special fastener for screw bolt and match board for construction

The utility model relates to a kind of building lathe turner and goes up bolt special, template fastener, particularly be used for fastening, manufacture concrete component.

As everyone knows, in building construction process, the fastener of making the concrete component of wall adopts stud to pass template parallel to each other usually, and nut is tightened on the bolt two ends respectively, inhales template and tightens up member in the plate, as placing of concrete in toward template.The shortcoming of this device is: 1. bolt often is embedded in the member, is difficult for taking out, so recycling rate of waterused is low, causes the waste of steel.2. operating personnel need carry and remove son in the work progress, so that nutting is made troubles to operation owing to carrying instrument to the people who is engaged in work high above the ground especially.3. stud in working order in, be to bear axial shearing force for each.Because what adopted at the two ends of stud is common microgroove, compare with the utility model, that tooth form seems is meticulous, excessively a little less than, so except screw and unclamp the nut time long, mounting or dismounting template speed is slow, the inefficiency, bear power when big at bolt, when being subjected to shearing force big (be thread) also easily causes the damage of thread.

The purpose of this utility model is to overcome the defective of above-mentioned known technology, carry a kind of in building operations from concrete than being easier to pull down screw rod, reusable, strengthen the strong height of ridge on the screw rod, operate the screw rod template fastener that has special-shaped nut special-purpose among a kind of easily lathe turner of building that saves time.

The purpose of this utility model solves by following scheme:

The utility model includes template, and the screw rod of logical screw thread passes template, and special-shaped nut is equipped with at the screw rod two ends outside template.Screw rod is a coarse pitch, brachydont, and pitch is 8 millimeters, height of thread is 1 millimeter to 1.5 millimeters, and angle of thread is 90 degree, and lead angle is that 9 degree are to 10 degree, an end face of special-shaped nut is attached on the template face, and two boss with the center screw symmetry are arranged on the extension arm of side.This two boss can be quadrangular, six prismatic or other shapes.

The utility model has the advantages that:

1. because screw rod of the present utility model is the screw rod of logical screw thread, as long as revolve the special-shaped nut of template both sides when dismounting, screw rod more easily screws out from special-shaped nut, and is promptly reusable, thereby saves steel.

2. because the extension arm of the special-shaped nut of the utility model is provided with boss, in the construction, operating personnel only need to strike two boss positions with tup, or refute in boss and nut outer rim to the crack with iron rod, just but the turn nut does not need to remove son, thereby brings convenience to operating personnel.

3. screw rod of the present utility model is that coarse pitch, brachydont and angle of thread, lead angle are all bigger, therefore screws nut in the construction and saves time, and also improves the thread shear strength simultaneously.

4. the utility model adopts at " the three rod formula screw rod cold-rolling mills " of the applicant's invention and goes up technique for rolling, and the screw rod of making not only can improve screw rod tensile strength, saves steel simultaneously again.

Description of drawings:

Fig. 1: be the utility model structural representation;

Fig. 2: be special-shaped nut schematic diagram among Fig. 1;

Fig. 3: be screw rod schematic diagram among Fig. 1.

Below in conjunction with accompanying drawing one step of embodiment progress of the present utility model is described in detail:

Screw rod 2 passes two templates parallel to each other 1, screw rod 2 is screw rods of a logical screw thread, special-shaped nut 3 is spun on the screw rod two ends, and an end face of special-shaped nut is that the plane is attached on the lateral surface of template 1, and two boss with the center screw symmetry are arranged on the extension arm of special-shaped nut side.When the screw rod external diameter was 16 millimeters, pitch was 8 millimeters, and height of thread is 1 millimeter, and angle of thread is 90 degree, and lead angle is 9.63 degree.The outer rim of special-shaped nut 3 can be quadrangular or six prismatics, respectively has one to be quadrangular or six prismatic or other shape boss at extension arm two ends center screw symmetry place, and is gapped between two boss and the nut outer rim.

Claims

1, a kind of screw rod for building, template fastener, include template (1), the screw rod (2) that it is characterized in that logical screw thread passes template, at template external screw rod two ends special-shaped nut (3) is housed, the pitch of screw rod tooth is 8 millimeters, height of thread is 1 millimeter to 1.5 millimeters, and angle of thread is 90 degree, and lead angle is that 9 degree are to 10 degree; End face of special-shaped nut is attached on the template face, and two boss with the center screw symmetry are arranged on the extension arm of nut side.

2, according to fastener described in the claim 1, it is characterized in that screw flight tooth height is 1 millimeter, lead angle is 9.63 degree.

3, according to the fastener described in claim 1 or 2, the outer rim that it is characterized in that special-shaped nut center screw can be four company's shape or hexagons, can be quadrangular, six prismatic or other shapes with two boss of center screw symmetry, gapped between two boss and the nut outer rim.