CN2275158Y

CN2275158Y - Lateral rod and straight rod combined structure of ladder

Info

Publication number: CN2275158Y
Application number: CN 96244853
Authority: CN
Inventors: 苏奇男
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-28
Filing date: 1996-11-28
Publication date: 1998-02-25
Anticipated expiration: 2006-11-28

Abstract

The utility model relates to a transversal and straight rod combined structure of a ladder. A plurality of parallel transversal rods are connected between two parallel straight rods; through holes are arranged on the straight rods, the through holes are positioned on the outer side part of the straight rods, and the hole diameter of each through hole is smaller; a clamping part which convexly extends is formed on the outer side part of each through hole corresponding to the inner side part. A clamping edge is arranged on the near end part of each transversal rod, and an extension part is extended outwards from one side of the clamping edge; a reinforcing liner ring is sheathed on the extension part of each transversal rod to cause the extension part and the reinforcing liner ring of each transversal rod to be penetrated in each through hole of each straight rod; one end of the reinforcing liner ring is contacted with the clamping part, and the other end of the reinforcing liner ring is contacted with the clamping edge of each transversal rod. The utility model has the advantages of high structural strength, high durability, safety, etc.

Description

The structure of a kind of ladder cross bar, straight-bar combination

The utility model relates to the structure of a kind of ladder cross bar, straight-bar combination.

The structure of ladder commonly used, as shown in Figure 4 a kind of, be to include two straight-bars 40 and number cross bar 41, wherein, two straight-bars, 40 1 sides are respectively established the positioning strip 42 that a strip and section are the Contraband font, and on this positioning strip 42, equidistantly establish several screws 43, and a screw 410 that matches with the screw 43 of positioning strip 42 is respectively established at the two ends of each cross bar 41; During the combination of this kind common structure, earlier with this two straight-bar 40 and put, again cross bar 41 two ends are penetrated each straight-bar 40 respectively and put, again cross bar 41 two ends are penetrated positioning strip 42 inboards of each straight-bar 40 respectively, make the screw 43 of positioning strip 42 involutory with the screw 410 of cross bar 41, again in both screw 43,410 locking bolts, and then make cross bar 41 and straight-bar 40 connect to one; The structure design of this kind product commonly used is not good, can produce the following points defective during enforcement:

1, integrated structure intensity is not good, damages easily; The structure that its straight-bar 40 combines with cross bar 41, be to establish Contraband shape positioning strip 42 at straight-bar 40 sidepieces, again cross bar 41 ends being penetrated positioning strip 42 locking bolts fixes, and positioning strip 42 is to be formed by the aluminium flake bending, intensity a little less than, use through a period of time, can produce the phenomenon of losing, and screw can cause the situation of destroying and causing cross bar to get loose in the junction.

2, add positioning strip, not only waste material, increase cost, and grip inconvenience, safety is low; It adds positioning strip 42 in straight-bar 40 sides, this positioning strip 42 and straight-bar 40 parallel extensions, and suitable waste material, and also the increase width causes the inconvenience in the gripping, and is careless slightly, just not exclusively drops ground, poor stability because of gripping easily.

In addition, a kind of ladder structure commonly used is arranged as shown in Figure 5 again, it is to establish perforation 501 on the straight-bar 50 and form protuberance 510 on cross bar 51, cross bar 51 penetrates the perforation 501 of straight-bar 50, make its protuberance 510 brute forces by straight-bar 50 perforation 501 peritreme and form the blocking state, establish fixture block 52 in cross bar 51 end plugs again, be equipped in the outer rim of straight-bar 50, and then cross bar 51 and straight-bar 50 are combined into one with fixture block 52 1 end invaginations; It penetrates cross bar 51 brute forces the perforation 501 of straight-bar 50, its

protuberance

510 or 501 peritremes of boring a hole can cause destruction, so that blocking poor effect, and fixture block 52 plugs are located on the cross bar 51, its blocking effect is also not good, is easy to generate the phenomenon that gets loose, so the fastness of this kind common structure is not good, take off damage easily, safety is not good.

For overcoming above-mentioned defective, the utility model provides a kind of ladder that has strengthening action and saving material concurrently, reduces cost, improves effects such as safety.

The utility model is described in further detail below in conjunction with accompanying drawing

Fig. 1 is the utility model partial exploded view

Fig. 2 is the utility model exploded enlarged diagram

Fig. 3 is the local combination dissected figure of the utility model

Fig. 4 is a kind of schematic diagram commonly used

Fig. 5 is another kind of schematic diagram commonly used

As shown in Figure 1, 2, roughly as commonly used, it includes two straight-bars 10 to the utility model basic structure With several cross bars 20, make parallel be connected between this two straight-bar 10 of these cross bars 20 and consist of ladder shape Attitude, principal character of the present utility model is to establish perforation 11 at straight-bar 10, and the shape of its perforation 11 Attitude is the outside portion 110 tool smaller aperture due that are positioned at straight-bar 10, makes the outside portion 110 of this perforation 11 With respect to the fastening part 112 of inside portion 111 formation projections, cross bar 20 then establishes one in its close end Edge clipping 21, and stretch an extension 22 in edge clipping 21 1 epitaxial lateral overgrowths, and cooperate establish one can be sheathed on straight The reinforcement grommet 30 of the extension 22 of bar 10.

Such as Fig. 1, shown in Figure 3, during the utility model combination, be to serve as a contrast earlier the strong ring 30 of mending to be sheathed on cross bar 20 extension 22 makes reinforcement grommet 30 1 ends 31 be against the edge clipping 21 of cross bar 20, will again The extension 22 of cross bar 20 penetrates the perforation 11 of straight-bar 10 together with reinforcement grommet 30, makes cross bar 2 0 tip end projects is outside the perforation 11 of straight-bar 10, and reinforcement grommet 30 other ends 32 are butted on perforation 1 1 outside portion, 110 formed fastening part 112 inner edges are not so that reinforcement grommet 30 just can outwards take off Go out; Urge cross bar 20 ends with the riveting apparatus application of force again, make cross bar 20 ends be bent into the edge clipping that extends out 210, and then to be equipped in the straight-bar 10 interior outsides inside and outside 20 liang of edge clippings 21 of cross bar, 210, make Cross bar 20 is combined into one with straight-bar 10, and is assembled state of the present utility model.

The utlity model has following advantage:

1, the preferable reinforcing function of tool, integrated structure intensity is good, and is not fragile; The perforation of its straight-bar 10 forms relative fastening part 112, and in the extension 22 sheathed reinforcement grommets 30 of cross bar 20, again by 30 reinforcement of reinforcement grommet, when the riveting utensil urges, its reinforcement grommet 30 is filled in straight-bar 10 inside, its reinforcement grommet 30 still is and radially bears urgent pressure status, and the reinforcement grommet 30 bigger strain intensity of tool radially, so can not produce the phenomenon that the straight-bar depression is destroyed.

2, need not add positioning strip, can save material, reduce cost, and gripping is convenient, safe; Its cross bar 20 sheathed reinforcement grommets 30 directly fasten in straight-bar 10 cross bar 20, need not add positioning strip as technology commonly used, thus save material, and can not increase width, so grip conveniently, the difficult generation grips the danger of not exclusively dropping ground, and be safe.

Claims

1, a kind of ladder cross bar, the structure of straight-bar combination, it is to be connected with cross bar parallel more than between two parallel straight-bars, it is characterized in that: establish perforation on the straight-bar, this perforation is positioned at the outside portion tool smaller aperture due of straight-bar, this perforation outside portion relative inner portion forms the fastening part of projection, the cross bar close end is then established an edge clipping, and stretch an extension in edge clipping one epitaxial lateral overgrowth, and at the sheathed reinforcement grommet of the extension of cross bar, make the extension of cross bar be arranged in the perforation of straight-bar together with the reinforcement grommet, this reinforcement grommet one end supports above-mentioned fastening part, and the other end then is butted on the edge clipping of cross bar.