CN201170058Y

CN201170058Y - Telescopic ladder

Info

Publication number: CN201170058Y
Application number: CNU2008200007284U
Authority: CN
Inventors: 郭晶耀
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-21
Filing date: 2008-01-21
Publication date: 2008-12-24
Anticipated expiration: 2018-01-21

Abstract

The utility model discloses a telescopic ladder, comprising a plurality of ladder column units, transverse ladder plates, and locking mechanisms. Each ladder column unit consists of a plurality of serially connected hollow ladder tubes with different calibers. The upper end of each hollow ladder tube is sleeved with a cover head and a connecting suite. One end of each connecting suite is assembled with a locking mechanism and a transverse ladder plate. After the integral assembly is completed, the ladder is very safe and stable. Not only the control is facilitated, but also the damage due to foreign object infiltration is avoided. When the ladder is stretched for use, a through fixing hole at the lower section of the internal hollow ladder tube is located by a lock bar of the external hollow ladder tube passing through the hole. When the lock bar is retracted, the internal hollow ladder tube automatically lowers to be furled.

Description

Extension ladder

Technical field

The utility model relates to a kind of extension ladder, and it is more firm really particularly to relate to a kind of package assembly, and is easy to assembling and the extension ladder with preferable safety.

Background technology

The use of ladder has become the indispensable instrument of people, the utensil of ascending a height such as ladder or scaffold for example, and all providing people can be easily and obtain apace or construct and be located at the effective tool of eminence article.

General ladder, as shown in Figure 1, this ladder 800 is joined by two cleat stanchions and to form, and the cleat stanchion lower end is provided with foot pad and skids preventing, then is provided with the pedal of the suitable distance of being separated by therebetween, is the A font during use for use.

This traditional type ladder because its overall volume is quite big, carries quite inconvenience, and folding and unfolding also need take of such a size space, lacks to use elasticity.

The utility model content

The purpose of this utility model is, a kind of extension ladder is provided, this extension ladder is multi-section type cleat stanchion unit, laterally gangboard and locked mechanism are formed, and each saves the cleat stanchion unit by hollow ladder pipe, pullover and connect external member and form, and so can conveniently fold the use of carrying, collect or stretch.

Another purpose of the present utility model is, it is pullover with hollow ladder pipe and be connected and stick together fixingly after external member fixes each other again, is difficult for getting loose.

An also purpose of the present utility model is that it connects external member and avoids the corrosion damage because of the coating that horizontal gangboard is arranged.

A kind of extension ladder of the utility model is to adopt following technological means to realize:

A kind of extension ladder, comprise most cleat stanchions unit, horizontal gangboard and locked mechanism, described cleat stanchion unit is composed in series by the terraced pipe of the different hollow of several calibers, and each hollow ladder pipe upper end also is arranged with pullover and connects external member, and connection external member one end is then organized and established locked mechanism and horizontal gangboard.

Described pullover, the terraced pipe of hollow and connect external member for sticking together combination.

Described pullover, be provided with the mucus runner in inside and outside ring wall and make with hollow ladder pipe and be connected external member and cohere for injecting adhesive agent.

Described pullover inside and outside mucus runner is to communicate.

The local paragraph complex of described ladder pipe upper end becomes the annular snap ditch is arranged, with pullover in the mutual embedding of the set internal projecting ring of relative position.

The local paragraph complex of described ladder pipe upper end becomes the hemispherical tenon is arranged, with pullover in the mutual embedding in the set hole of relative position.

The described pullover shrinkage joint that is provided with again.

Described connection external member, having one can be for coating pullover socketed pipe, and to be located at socket caliber direction be the upright fishplate bar that is parallel to each other, and its pipe periphery is provided with clamping hole again between parallel fishplate bar.

Described locked mechanism, comprise stop, locking bar, spring and driving lever, wherein, stop front end both sides are to collude end can supply to block mutually with the fishplate bar that is connected external member, its inner rear end has one can be for the spring groove that is installed with spring, spring is held the contact locking bar in addition, and the locking bar stage casing is that axle pitches for driving lever that it moves forward and backward into control.

Described hollow ladder pipe lower end is provided with Buffer Unit again, and this Buffer Unit slightly is the cover tubular, and the button hole that is fixed in terraced pipe is colluded by trip in its upper end, and its hypomere periphery is provided with the elasticity seal that keeps friction when it is contacted with the ladder pipe is inner.

Described Buffer Unit inside is provided with a glued membrane again, and the glued membrane surface is formed with can be for the hole of air turnover.

The utility model extension ladder compared with prior art has following remarkable advantages and beneficial effect:

Because be provided with Buffer Unit in hollow ladder pipe lower end, the default button hole that is fixed in terraced pipe is colluded by trip in its upper end, its hypomere periphery then is provided with when the elasticity seal supplies to make it to contact with the ladder pipe is inner and keeps friction, folds with minimizing noise and buffering.Its inside is provided with a glued membrane, and when Buffer Unit moved up and down along with terraced pipe, air can be through this hole turnover, to promote buffering effect.After assembling was finished, the terraced pipe of hollow had Buffer Unit because of the bottom, can increase with the buffering that contacts of outer ladder pipe inner tubal wall to rub; Pullover and the ladder pipe that ladder pipe upper end is set and is connected external member and closely coheres is fixingly controlled so very safety and firmness was not only convenient after overall package was finished, and can be avoided the foreign object infiltration to cause damage.When stretch using, the hypomere of inner hollow ladder pipe fastens the hole and is organized to establish to pass to the locking bar of outside hollow ladder pipe it is located, and when locking bar withdraws from, inner hollow ladder pipe promptly can descend automatically and fold.

Description of drawings

Fig. 1 is the stereogram of existing extension ladder;

Fig. 2 is three-dimensional diagrammatic sketch for the utility model folds;

Fig. 3 launches to use three-dimensional diagrammatic sketch for the utility model;

Fig. 4 is the three-dimensional exploded view of cleat stanchion of the present utility model unit and horizontal gangboard;

Fig. 5 is the combination stereogram of cleat stanchion of the present utility model unit and horizontal gangboard;

Fig. 6 is the combination section of cleat stanchion of the present utility model unit and horizontal gangboard;

Fig. 7 is an embodiment section diagrammatic sketch of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing specific embodiment of the utility model is illustrated:

See also Fig. 2, shown in Figure 3, this kind extension ladder of the present utility model, its extension ladder 1 can be and folds shape, or be and open shape, it comprises most cleat stanchions unit 2, horizontal gangboard 3 and locked mechanism 4, is the ladder of joint joint promotion when it launch to use, then respectively save when folding the cleat stanchion unit each other different tube diameters setting and can be stacked mutually.

See also Fig. 4, shown in Figure 5, this cleat stanchion unit 2 is made up of hollow ladder pipe 21, pullover 22 and connection external member 23; Each hollow ladder pipe 21, its position high caliber of healing is littler, and its upper end is formed with annular snap ditch 211, hemispherical tenon 212 and hole 213, and hypomere then is provided with and fastens hole 214, each hollow ladder pipe 21 upper end sheathed pullover 22; This pullover 22 is annular shape, its outside sheathed adapter sleeve spare 23, it is involutory mutually that annular snap ditch 211, hemispherical tenon 212 and hole 213 correspondence positions of itself and hollow ladder pipe 21 are provided with internal projecting ring 221, protruding grain 222 and shrinkage joint 223, its bottom then is provided with the outer annular edge 224 of outside protrusion, and its inner and outer pipes wall surface also is concaved with mucus runner 225,226, inside and outside mucus runner 225,226 communicates with a through hole 227, sees also shown in Figure 6ly, and pullover 22 tops are provided with the interior ring limit 228 that extends internally.

This connects external member 23, and having one can be for coating pullover socketed pipe 231, and is located on the footpath direction of socketed pipe and is two upright fishplate bars 232 that are parallel to each other; The tube wall of socketed pipe 231 is provided with relative hole 233 for injecting adhesive agent, and its pipe periphery also is provided with clamping hole 234 between fishplate bar 232.

Its locked mechanism 4 as shown in Figure 4, comprises a stop 41, a locking bar 42, a spring 43 and a driving lever 44; This stop 41, its front end both sides are for colluding end 411, can be for blocking mutually with the fishplate bar 232 that is connected external member, its inner rear end has one can be for the spring groove that is installed with spring 43, locking bar 42 1 end contact springs 43 are held in addition then over against the clamping hole 234 that connects external member, and locking bar 42 can be stirred by driving lever 44 after going into for driving levers 44 forks with the axle 421 in its stage casing, and described driving lever 44 also is sheathed with stop intended groove 412 with its lower end axis 441, so that it be that the axle center rotates with axis 441.

This horizontal gangboard 3 is sheathed on locked mechanism 4 outsides, and its lower end is formed with through hole 31 and stretches out for driving lever 44.

In addition, hollow ladder pipe 21 lower ends are provided with Buffer Unit 5, and this Buffer Unit 5 slightly is the cover tubular, and its upper end mat trip 51 colludes the default button hole 52 that is fixed in terraced pipe, its hypomere periphery then is provided with elasticity seal 53 and keeps friction when inside contacts for itself and ladder are managed, and folds to reduce noise and buffering.As shown in Figure 6, its inside is provided with a glued membrane 54 again, and glued membrane 54 surfaces form porose, and thus, when Buffer Unit 5 moved up and down along with terraced pipe, air can be through this hole turnover, to promote buffering effect.

After assembling was finished, as shown in the figure, hollow ladder pipe was because of there is the setting of Buffer Unit 5 and elasticity seal 53 bottom, can increase and the contacting to cushion and rub of outer ladder pipe inner tubal wall, and reached the purpose that cushions lifting; Ladder pipe upper end set pullover 22 can by mucus runner 225,226 for inject adhesive agent make itself and ladder manage 21 and be connected external member 23 reach closely cohere fixing, so safety and firmness very after overall package is finished; Set locked mechanism 4 not only makes things convenient for control also because it is coated on horizontal gangboard 3 inside fully, and can avoid the foreign object infiltration to cause damage.

When stretch using, the hypomere of inner hollow ladder pipe fastens 214 groups in hole and establishes to pass to the locking bar 42 of outside hollow ladder pipe it is located, and when locking bar 42 withdraws from, inner hollow ladder pipe promptly can descend automatically and fold.

Below for ease of the explanation, represent with different figure numbers.When folding, as shown in Figure 7, the driving lever 62 of the horizontal gangboard 61 of first floor is clockwise rotated, drive locking bar 63 withdraw from clamping hole and second layer ladder pipe fasten the hole after, second layer ladder pipe 64 is promptly held the horizontal gangboard 65 of the related second layer and is dropped downwards because of losing to keep off, when the horizontal gangboard 65 of the second layer drop to downwards make its lower end driving lever 66 touch the horizontal gangboard 61 of first floor after, driving lever 66 clockwise rotated because of stressed being, drive its inner locking bar 67 and withdraw from clamping hole, 68 and the 3rd layers of horizontal gangboard 69 of the 3rd layer of ladder pipe are fallen smoothly, by that analogy, can finish whole ladder pipes and gangboard fast folds to push-down stack.

It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technical scheme of unrestricted the utility model; Therefore, although this manual has been described in detail the utility model with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of utility model, and it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. extension ladder, comprise most cleat stanchions unit, horizontal gangboard and locked mechanism, it is characterized in that: described cleat stanchion unit is composed in series by the different hollow ladder pipe of several calibers, each hollow ladder pipe upper end also is arranged with pullover and the connection external member, and connection external member one end is then organized and established locked mechanism and horizontal gangboard.

2. extension ladder according to claim 1 is characterized in that: wherein pullover, the terraced pipe of hollow and connect external member for sticking together combination.

3. extension ladder according to claim 1 is characterized in that: described pullover, and be provided with the mucus runner in inside and outside ring wall and make with hollow ladder pipe and be connected external member and cohere for injecting adhesive agent.

4. extension ladder according to claim 1 is characterized in that: described pullover inside and outside mucus runner is to communicate.

5. extension ladder according to claim 1 is characterized in that: the local paragraph complex of described ladder pipe upper end becomes the annular snap ditch is arranged, with pullover in the mutual embedding of the set internal projecting ring of relative position.

6. extension ladder according to claim 1 is characterized in that: the local paragraph complex of described ladder pipe upper end becomes the hemispherical tenon is arranged, with pullover in the mutual embedding in the set hole of relative position.

7. extension ladder according to claim 1 is characterized in that: the described pullover shrinkage joint that is provided with again.

8. extension ladder according to claim 1, it is characterized in that: described connection external member, having one can be for coating pullover socketed pipe, and to be located at socket caliber direction be the upright fishplate bar that is parallel to each other, and its pipe periphery is provided with clamping hole again between parallel fishplate bar.

9. extension ladder according to claim 1, it is characterized in that: described locked mechanism, comprise stop, locking bar, spring and driving lever, wherein, stop front end both sides are to collude end can supply to block mutually with the fishplate bar that is connected external member, its inner rear end has one can be for being installed with the spring groove of spring, and spring is held the contact locking bar in addition, and the locking bar stage casing is that axle pitches for driving lever that it moves forward and backward into control.

10, extension ladder according to claim 1, it is characterized in that: described hollow ladder pipe lower end is provided with Buffer Unit again, this Buffer Unit slightly is the cover tubular, the button hole that is fixed in terraced pipe is colluded by trip in its upper end, and its hypomere periphery is provided with the elasticity seal that keeps friction when it is contacted with the ladder pipe is inner.

11, extension ladder according to claim 10 is characterized in that: described Buffer Unit inside is provided with a glued membrane again, and the glued membrane surface is formed with can be for the hole of air turnover.