CN2292181Y

CN2292181Y - Upset screw

Info

Publication number: CN2292181Y
Application number: CN 97238243
Authority: CN
Inventors: 李伟旬
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-28
Filing date: 1997-05-28
Publication date: 1998-09-23
Anticipated expiration: 2007-05-28

Abstract

The utility model relates to an expansion screw which is fastened inside the wall and is composed of a screw bolt 1 and an expansion sleeve 2 which are combined together. The utility model is characterized in that an expansion head 3 of the screw bolt 1 is respectively made into a conical shape, a cylindrical shape and a cone shape; the front part of the expansion sleeve 2 whose outer wall is provided with two positioning cones 5 which are arranged at equal interval is provided with four grooves 4 which are arranged at equal interval. The utility model has the advantages of no influence on the usability and the appearance of a fastened device, simple structure, convenient assembly and disassembly and safety.

Description

Swell fixture

The utility model relates to screw, the especially screw that combines with expansion set that is anchored in the wall.

Normally used swell fixture is equipped with the bolt 12 that an end is rotary with nut 13 as shown in Figure 3 in the expansion set 11, its other end is that taper type expands 14, and along with screwing of nut 13, expanding 14 struts expansion set 11, arrives purpose fastening in cinclides.Yet along with screwing of nut 3, bolt 2 outward extending parts are long, influence the shelving of related device, use and attractive in appearance, particularly when the device that is fixed was removed, the screw that is anchored in the wall was difficult to take out, if will take out, must carry out bigger damageability to body of wall removes, these troubles show particularly outstandingly in interior decoration, if do not take out, bolt appears long and brings inconvenience to daily life.

The purpose of this utility model is, overcomes the deficiency of above-mentioned screw, and design, produce a kind ofly install and remove conveniently, beautiful and applicable swell fixture.

Scheme of the present utility model is: it is an integral body that bolts and nuts are manufactured and designed, and bloated 3 of bolt 1 is processed as taper shape, cylindrical, taper type successively; The front portion of expansion set 2 is processed with the fluting 4 of four equivalent arrangements, and its inwall has the internal thread for bolt 1 precession, and its outer wall is processed with two place's locating coness 5 of equivalent arrangements.

Swell fixture with above-mentioned feature adopts the Q235A steel to do, and the surface is through zinc-plated processing, and its diameter is M10, and its pulling force permitted value is 7kW, and the shearing permitted value is 5.1kN.

According to actual needs, can design the production diameter is this device of multiple diameter such as M6, M8, M10, M12, M16.And in same diameter, can design again and produce the swell fixture that length is plurality of specifications.

The utility model swell fixture is not owing to have protruding part after installing, so not only not influencing fastened device uses easily, and the screw in the end of packing into can take out like a cork, as the location when pre-buried, the expansion set 2 of screw can be imbedded in the wall, install this screw powder to be gone in the bisque of body of wall behind the solid device, leave no trace, kept the smooth attractive in appearance of metope.

Be further described in conjunction with the accompanying drawings:

Fig. 1 is a structural drawing of the present utility model

Fig. 2 is that the K of Fig. 1 is to structural drawing

Fig. 3 is existing swell fixture structural representation

Fig. 1 has described the utility model swell fixture and has been combined with expansion set 2 by bolt 1 and form, and it is an integral body that bolts and nuts are manufactured and designed, and it expands and 3 is processed as taper shape, cylindrical, taper type successively; Expansion set 2 front portions are processed with the fluting 4 of four equivalent arrangements, in order to the bolt precession with expansion set 2 distendings; Its inwall has the internal thread for the bolt precession, and its outer wall is processed with two place's locating coness 5 of equal distribution, to stablize expansion set 2 in wall, is beneficial to bolt precession successfully.

Fig. 1 has also embodied the working condition of the utility model swell fixture:

In the time need being installed by solid device, after getting out the specified diameter hole on concrete wall or the brick wall, fluting end on the expansion set 2 is packed in the hole, screw seals in and is inserted in the expansion set 2 behind the mounting hole on the solid device, screw in bolt 1, bloated 3 on the bolt 1 can make expansion set 2 fluting end distendings, be anchored in the wall hole, constantly screw bolt 1 then, directly cause by till device is tightened up admittedly.

When being removed when needing that expansion set 2 takes out within the walls by solid device, withdraw from bolt 1 earlier, taking away by solid device, again bolt 1 is screwed in swing in the expansion set 2, firmly be pulled outwardly, can take out expansion set within the walls, the aperture that stays on the metope is repaired promptly smooth a little.

The utility model: do not affect by the usability of solid device and aesthetic property, have simple in structure, The characteristics that mounting or dismounting are convenient, safe and reliable.

Claims

1. be anchored on swell fixture in the wall and combined with expansion set 2 by bolt 1 and form, it is characterized in that: it is an integral body that bolts and nuts are manufactured and designed, and bloated 3 of bolt 1 is processed as taper shape, cylindrical, taper type successively; The front portion of expansion set 2 is processed with the fluting 4 of four equivalent arrangements, and its inwall has the internal thread for bolt 1 precession, and its outer wall is processed with two place's locating coness 5 of equivalent arrangements.

2. according to wanting profit to require 1 described swell fixture, it is characterized in that adopting the Q235A steel to do, the surface is through zinc-plated processing, and its diameter is M10, and its pulling force permitted value is 7kW, and the shearing permitted value is 5.1kN.