CN2178298Y

CN2178298Y - Screw base for wood

Info

Publication number: CN2178298Y
Application number: CN 93222467
Authority: CN
Inventors: 曾春荣
Original assignee: Xinye Enterprise Co Ltd
Current assignee: Xinye Enterprise Co Ltd
Priority date: 1993-08-28
Filing date: 1993-08-28
Publication date: 1994-09-28
Anticipated expiration: 2003-08-28

Abstract

The utility model relates to a screw base, in which an against surface with expanded diameter is formed on a base body, a cylindrical positioned column is extended with one end of the against surface, in which a positioned lug without circular section is also formed, screw threads and a backing ring which is capable of embracing a screw shaft body, are arranged on the inner side of a cylindrical body. When the screw base is inserted into the round hole of the wood, the against surface and a riveted construction which is on the other end of the positioned column, can avoid the axial displacement of the base body, and the positioned lug of the cylindrical body is inserted on the inner wall of the circular hole, and strengthens the tabling force between the screw base and the wood.

Description

Screw base for wood

The utility model relates to a kind of screw seat, particularly relates to the screw seat that a kind of timber uses fixedly the time.

General timber is in course of working, the mode that two timber are fixed is a lot, and common mode has the tackiness agent of employing with its cementation, also there is the iron nail of use that two timber nail is firmly fixed, if but timber after manufacturing must and other metal constructions combine the time, the general mode that is adopted then is to bury the screw seat underground in the timber precalculated position, the screw that Gong the matches location that is spirally connected, and in articles for daily use this kind of use means of fixation the most general should belong to chair; Certainly, wood raw material is arranged if adopt on such as article such as sports equipments at other, this timber again must and other when for example the member of metallic material combines, bury the mode that screw seat confession screw is spirally connected underground, also of common occurrence; The utility model promptly uses the screw seat on timber is fixing to be improved at this kind is special.

Be example just with general common office desk and chair, when general office desk and chair desire is fixed on the seat support below with movable footrest, its mode that adopts roughly as shown in Figure 1, at first on a timber 11, be drilled with predetermined circular hole 111, again a screw seat 12 is embedded in it, it is a columned location barrel mast 121 that above-mentioned screw seat 12 penetrates with timber 11 circular holes 111 1 ends, in cylinder center through hole inwall screw thread 122 is set, and the one end then forms the bigger supporting surface of a diameter 123; When manufacturer's desire is fixed on timber 11 belows with the plate on the chair foot rest 13, at first some circular holes 111 are set in timber 11 precalculated positions, location barrel mast 121 with screw seat 12 is implanted in the circular hole 111 again, lay sponge 14 afterwards in timber 11 tops, its outer rim bag is established one deck crust 15, a sheathed pad 17 on a screw 16 again, and it is arranged in location barrel mast 121 belows of screw seat 12, so, can be firm foot rest plate body 13 is fixed on timber 11 belows.

And in fixing, can find, general timber 11 bores more or less freely with drilling tool when the moulding hole, therefore, its circular hole that is drilled with 111 is circle, and screw seat 12 penetrates with the cylindrical body that the location barrel mast 121 of timber 11 also is tight plug, under this state, when progressively inside packing of screw 16, because pedestal penetrates with the location barrel mast 121 of timber 11 and the snap-in force deficiency between circular hole 111 inwalls, therefore, very easily drive 12 rotations of screw seat in the lump, when this two member rotates in the lump, be spirally connected and both can't judge its degree that is spirally connected in the process of being spirally connected, two members are combined closely, so often in use for some time, screw 16 is easy to generate loosening, and this is one of its shortcoming; Secondly, though screw seat 12 tops were provided with the supporting surface 123 that a diameter expands in the past, but above-mentioned supporting surface 123 can only prevent that screw seat 12 is to bottom offset, but can't avoid screw seat 12 be subjected to the pushing tow of screw 16 and axially on move, above-mentioned shortcoming not only can cause the shakiness that is spirally connected, axial displacement that also can coping screw seat 12 and cause the out-of-flatness on surface obviously with the design of the screw seat 11 of prior art, can produce a lot of shortcomings.

In order to improve 12 second shortcomings of screw seat, once the someone designed screw seat 2 as shown in Figure 2, this screw seat 2 and maximum in the past different being: the supporting surface 21 of pedestal is positioned at the root edge groove 113 of timber 11, and with location barrel mast 22 length of pedestal lengthening, make its ora terminalis 221 protrude in timber 11 end faces, utilize riveting technology that ora terminalis 221 rivetings are flat afterwards, and ora terminalis 221 is distributed in the groove 114 on timber 11 tops, the process pedestal of can avoiding being spirally connected produces axial displacement; Though the improvement of above-mentioned structure has improved screw seat 12 part deficiencies in the past, but as in the previous paragraph, timber 11 is the easiest with circle when being drilled with hole, therefore, with the design of the cylindric location barrel mast 22 of existing screw seat 2, can't avoid screw 23 when being spirally connected, to drive the shortcoming of screw seat 2 turns in the lump equally.

From the above, cause the main cause of screw seat 12,2 original place turns to be: screw seat 12,2 and 111 of timber 11 circular holes can't produce due to the preferable snap-in force.

Main purpose of the present utility model is that the screw that has better interlock, locating effect between a kind of and timber seat is being provided.

The Screw base for wood that the utility model provides is formed with a supporting surface that reliably is against on the timber on its pedestal, extend the location barrel mast that an inside is provided with screw thread in supporting surface one end, and above-mentioned location barrel mast is provided with the location bead of a non-circular section.

Screw base for wood of the present utility model is embedded at the default circular hole periphery of timber by above-mentioned location bead, can increase the inlay resultant force between screw seat and timber, avoid screw to drive the screw seat turn that the phase spiral shell is established in the lump by this in the process of being spirally connected, promote its in conjunction with after steadiness.

Below by preferred embodiment and accompanying drawing Screw base for wood of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is that a kind of screw seat of prior art uses the use schematic representation on timber.

Fig. 2 is that the screw seat of another kind of prior art uses the use schematic representation on timber.

Fig. 3 is the stereogram of the utility model Screw base for wood preferred embodiment.

Fig. 4 is the use longitudinal sectional view of the utility model Screw base for wood preferred embodiment.

Fig. 5 is the A-A sectional view of Fig. 4.

Fig. 6 is the use sectional view of another preferred embodiment of the utility model Screw base for wood.

At first, see also Fig. 3, screw seat 3 of the present utility model has the supporting surface 31 that a diameter enlarges, and is extended with a length greater than the fixing cylindric location barrel mast 32 of lumber thickness of desire in these supporting surface 31 1 sides, forms one again and encircle screw thread 33 on barrel mast 32 hollow walls of location; Location barrel mast 32 is near the location bead 34 of outstanding one section four horn shape of supporting surface 31 1 side outer walls, and this locatees diagonal intersection end points of bead 34 and the axis overlaid of location barrel mast 32 and supporting surface 31.

Please cooperate Fig. 4,5, when fixture 4 desires combine with a timber 5, on timber 5, be drilled with circular hole 51 equally, location barrel mast 32 with the utility model screw seat 3 is implanted in the circular hole 51 of timber 5 again, implanting back pedestal supporting surface 31 reliably is located in the default groove 511 of circular hole 51, barrel mast 33 outstanding ends in location then carry out riveted, make in its groove 512 that is diffused in circular hole 51 tops, to avoid 3 axial displacements of screw seat; And fixing in this way can the discovery, the location barrel mast 32 of screw seat 3 not only is with wall with circular hole 51 and closely cooperates, and outstanding four horn shapes location bead 34 equally can be because of the knocking in of pedestal on its cylinder, and embed in the timber 5; When in the screw thread 33 that is arranged in location barrel mast 32 in order to the fixing screw 6 of fixture 4, not only screw seat 3 can stressed axial displacement, this pedestal more can be by the tight interlock between location bead 34 and circular hole 51 inwalls, and prevents pedestal with screw 6 turns, makes it in conjunction with more firm.

And in order further to avoid spiral shell to establish screw in it in that to use day to produce long afterwards loosening, the utility model more can be as shown in Figure 6, assembling one soft gasket ring 72 in the location of screw seat 7 barrel mast 71 by rubber-moulding, above-mentioned gasket ring 72 is positioned at screw thread 711 tops of location barrel mast 71, and its center through hole is slightly less than the internal diameter of location barrel mast 71; In the time of in screw 6 is screwed onto screw seat 7, is subjected to embracing of soft gasket ring 72 and establishes, it is loosening to avoid screw 6 in use to produce, the steadiness after keeping it and fixing.

Certainly, with regard to the utility model purpose, the section of aforementioned location bead can be first embodiment's quadrilateral, or be second embodiment's Hexagon, certainly, it also can adopt other non-circular geometrical shapies, for example: pentagon, triangle or ellipse, obviously, location of the present utility model bead shape is not disclosed with embodiment and is exceeded.

By above explanation as can be known, the utility model forms the location bead of a non-circular section on the barrel mast of the location of screw seat, in this location barrel mast, assemble the gasket ring that a through hole is slightly less than the cylinder internal diameter again, in the time of can making the screw seat be embedded on the timber, avoid screw to drive screw seat rotation in the lump in the process of being spirally connected, therefore it more can prevent screw loosening naturally after being spirally connected.

Claims

1, a kind of Screw base for wood, screw seat have the supporting surface that a diameter enlarges, and are extended with a location barrel mast that can be embedded in the timber circular hole in the supporting surface homonymy, and location barrel mast hollow wall is provided with screw thread; It is characterized in that: the location bead that is extruded with a non-circular section on the cylinder of location barrel mast.

2, Screw base for wood as claimed in claim 1 is characterized in that: be assembled with the gasket ring that a center through hole is slightly less than the cylinder internal diameter in the cylinder of location barrel mast.

3, Screw base for wood as claimed in claim 1 is characterized in that: the location bead section of location barrel mast is quadrilateral.

4, Screw base for wood as claimed in claim 1 is characterized in that: the location bead section of location barrel mast can be triangular in shape, pentagon, Hexagon or ellipse.