CN103775454A

CN103775454A - Middle expansion metal screw

Info

Publication number: CN103775454A
Application number: CN201310297055.9A
Authority: CN
Inventors: 查焕民
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-11
Filing date: 2013-10-11
Publication date: 2014-05-07

Abstract

The invention particularly relates to a middle expansion metal screw which can be fixed to perforated bricks, dry hanging marble, air-added bricks and dry paving marble. Expansion screw pipes are provided with concave points, and the expansion screw is provided with convex points. In the fastening process, the expansion screw pipes and the expansion screw do not move along, and an expansion head is arranged between the expansion screw pipes. When the screw is turned tightly, the expansion head ejects the expansion pipes open. When the expansion pipes are connected, the expansion pipes are provided with grooves, the grooves have the guide function, and therefore the expansion pipes can be strutted like umbrellas. The head of the expansion screw is provided with a hexagon head, and therefore in the striking process, threads are not damaged; when the screw moves along, a spanner is used for fastening the hexagon head, so that the screw does not move along, and the purpose of fastening is achieved.

Description

Metal intermediate expansion screw

Affiliated technical field

The present invention relates to a kind of intermediate expansion screw, especially can be on perforated brick and cladding marble, aerated bricks, fixing intermediate expansion screw on dry paving marble.

Background technique

At present, known setscrew can only just be understood effectively in hard object, and soft has not just had any effects.Chemical bolt also can only just be understood effectively in hard object.But in engineering, often run on perforated brick and cladding marble aerated bricks, dry paving marble etc.And the difficulty that cannot fix.

Summary of the invention

In order to overcome existing setscrew, the retaining screws such as chemical bolt, can not be on perforated brick and cladding marble, aerated bricks, dry paving marble etc., upper fixing deficiency.The invention provides a kind of metal intermediate expansion screw, this screw can not only be fixed tight object in not hard object, can also be on perforated brick and cladding marble, and aerated bricks, the fixing tight objects such as dry paving marble.

The technical solution adopted for the present invention to solve the technical problems is: on expansion tube, have concave point, on setscrew, there is salient point, in the time that it is fastening, keep expansion tube and not transfer of setscrew, in the middle of expansion tube and expansion tube, there is expansion-head, in the time that screw turns tight, expansion-head is backed down expansion tube, in the time that expansion tube is connected with expansion tube, due to fluted on expansion tube, groove has played leading role, expansion tube is strutted as umbrella, on setscrew head, there is hexagon head, damaged screw not in the time beaing, again can be in the time of screw transfer, fasten hexagonal with spanner, make its not transfer, reach fastening object.

The invention has the beneficial effects as follows, can be in not hard object or having in empty object and fix tight object, facilitated in not hard object or fixed tight object having in empty object, simple in structure, easy to use.

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 split figure

Before Fig. 2 expands,

Design sketch after Fig. 3 expands.

1 setscrew in Fig. 1,2 expansion tubes, 3 expansion-head, 4 flat gaskets, 5 compression springs, 6 screw caps, the salient point on 7 setscrews, the hexagon head on 8 setscrews, the concave point on 9 expansion tubes, the groove on 10 expansion tubes.

Claims

1. a metal intermediate expansion screw, can be on perforated brick and cladding marble, aerated bricks, fixing intermediate metal setscrew on dry paving marble.

2. intermediate metal setscrew according to claim 1, is characterized in that, when expansion tube expansion time image umbrella struts to surrounding.

3. intermediate metal setscrew according to claim 2, is characterized in that, in the middle of expansion tube and expansion tube, have expansion-head, in the time that screw turns tight, expansion-head is backed down expansion tube, in the time that expansion tube is connected with expansion tube, due to fluted on expansion tube, groove has played leading role, expansion tube is strutted as umbrella, on setscrew head, have hexagon head, damaged screw not in the time beaing, again can be in the time of screw transfer, fasten hexagonal with spanner, make its not transfer, reach fastening object.