CN2089993U

CN2089993U - Cone expansion screw

Info

Publication number: CN2089993U
Application number: CN 91202275
Authority: CN
Inventors: 周文仁
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-02-12
Filing date: 1991-02-12
Publication date: 1991-12-04

Abstract

The utility model discloses a cone expansion screw, comprising frustum-shaped nuts, an expansion tube with seams, a gasket and corresponding bolts; the body of each nut is in the shape of the frustum. Thread holes are arranged in the center of the utility model, convex prisms are evenly distributed at intervals on the outer wall of the frustum, and the seam pieces of the expansion tube with seams are provided with extensible claws; besides, the claws can prevent the inserted cone from falling. The non-drying adhesive labeling structure used for fixing the cone and the expansion tube can be adopted, and the convex prisms on the cones are inosculated with the seams on the seam pieces of the expansion tube. The cone is fixed in the expansion tube; bolts which penetrate through the gasket are connected with the cones through a fastener and the expansion tube, and the fastening function is realized by the cones which expand the seams of the expansion tube. The utility model solves the problem of the screw of the original expansion tube, and the problem is that the screw is exposed outside and has the unaesthetic appearance.

Description

Cone expansion screw

The utility model belongs to a kind of expanding tube screw, and particularly a kind of back of using is at the building surface setscrew of Rose's head not.

At present, the setscrew of selling on the market is the bolt that is had the tapering crown by head, expand tube with seam, standardized washer is formed with spring ring and standard nut, and its using method is according to the weight of installation material or stressed size, selects different screw specifications for use, and the hole of on building, getting the respective diameters and the degree of depth, after putting into the bolt and expand tube of setscrew afterwards, put fastener again well, need only fastening nut then fastener can be securely fixed on the building.The application of above-mentioned setscrew is very widely, but owing to consideration from the commodity practical standpoint, the bolt of its band tapering crown generally is long partially, use building outer meeting more or less in back to produce the silk head of staying the outside, this unnecessary silk head is not promptly attractive in appearance also to be tended to hang the people and hangs thing and be prone to accidents.

The purpose of this utility model is to provide a kind of conical nut type setscrew, be that original bolts and nuts are inverted use, make the tapering crown that plays expansion on original bolt become band tapering nut, so both solved the problem that the silk head exposes, also reached practical and effect attractive in appearance.

The technical solution of the utility model, a kind of setscrew, it is nut by the band tapering, expand tube with seam, packing ring and bolt are formed, the nut body of said band tapering is a frustum shape, there is tapped hole the center, evenly fin spaced apart is arranged on the frustum outer wall, the pawl that prolongation is arranged on its seam sheet of said expand tube with seam, after the nut of band tapering inserts expand tube, available pawl is fixed anti-its of this nut and is come off, and bolt is joined by packing ring and nut, screws to reach to make the expand tube distending and bring into play it and fix by the effect of firmware on building, fin when screwing on the awl mother can coincide with the expand tube seam, reaches to prevent to bore female effect of rotating.Above-mentioned expand tube with seam also can not established the prolongation pawl, and with methods such as adhesive labels the expand tube and the nut of band tapering is fixed.

Using method of the present utility model, common setscrew is the same with using, and punches on building in advance, puts into the expand tube of having put tapered cup nut, and the aligning material installed is then tightened with corresponding bolt sleeve upper gasket and is got final product.(because of the fin effect, awl is female can not to be rotated by the seam of expand tube chucking) awl mother prolongs axial displacement when bolt rotates, owing to tapering must make expand tube directly return distending, till firmly.After installing, outer wall only exposes nuts, and is smooth and attractive in appearance.

Superiority of the present utility model: 1, solved outer Rose of original setscrew wall and the not beautiful problem of outward appearance; 2, can select the bolt kind as required arbitrarily, as all can with six sides, first cap or sunk screw; 3, cost is not high, is convenient to produce and can save a small amount of steel.

Further specify present technique below in conjunction with drawings and Examples.

Accompanying drawing 1 is a structural representation of the present utility model.

Wherein: 1 is the taper type nut; 2 expand tubes for band prolongation pawl; 3 is packing ring; 4 is bolt; 5 is the fin that stitches anastomotic position on the taper type nut with expand tube, and 6 is the prolongation pawl on the expand tube.

Accompanying drawing 2 is an elevation cross-sectional view of the present utility model.

Embodiment: a kind of setscrew is by cone table shape, middle nut 1 with threaded hole, expand tube 2 with seam, packing ring 3, bolt 4 are formed, after nut 1 is inserted expand tube 2, with expand tube seam anastomotic position fin 5 is arranged on its frustum outer wall, and have on the expand tube 2 prolong pawl 6 can make nut 1 insert rear defence it comes off, bolt 4 is joined with nut 1 by fastener and packing ring 3, screw and can reach expand tube 2 distendings and bring into play its fixedly effect of fastener.

Claims

1, a kind of conical nut type setscrew, comprise expand tube with seam and packing ring, it is characterized in that it is made up of nut that places the band tapering in the expand tube and the bolt that is used for finishing fastening effect that penetrates expand tube, the nut body of said band tapering is a frustum shape, there is tapped hole the center, evenly fin spaced apart is arranged on the frustum outer wall, the pawl that comes off after boring mother inserts of preventing of prolongation can be arranged on its seam sheet of said expand tube with seam, also can adopt the female adhesive label with expand tube of fixed cone; Seam on fin on the above-mentioned awl mother and the expand tube seam sheet coincide.