CN201412056Y

CN201412056Y - Triple lifting ladder

Info

Publication number: CN201412056Y
Application number: CN2009201056070U
Authority: CN
Inventors: 樊杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-23
Filing date: 2009-01-23
Publication date: 2010-02-24
Anticipated expiration: 2019-01-23

Abstract

The utility model discloses a super-elevation lifting ladder with the use height ranging from 4 to 15 m. The length of the retracted triple section lifting type ladder is one third of the use height thereof. Ladder posts are in riveted joint with transverse bracings via penetration holes. The hanging edge of the inner layer of ladder post sectional materials is occluded with that of a middle layerof ladder posts into slideways, the other hanging edge of the middle layer of ladder posts is occluded with that of an external layer of ladder posts into slideways, the three layers form a parent-subsidiary shape, and two plastic slide blocks are respectively mounted at the upper and the lower parts of each pair of slideways. A rope is used for lifting or lowering via pulleys, and a clamp is used for locking the required height. The clamp comprises a clip and a shifting tongue, wherein the clip comprises a clip rotating shaft, a spacing rivet, a clip convex nail, a clip tension spring, a fan-shaped groove and a clip convex edge, and the shifting tongue comprises a shifting tongue rotating shaft, a spring hanging rivet, a tail part convex nail and a shifting tongue tension spring. When the ladder is lifted, the clip can lock the required height; and when the ladder is lowered, the shifting tongue rotates to touch the clip convex edge to relieve the clip from the lock position, so as to lower the ladder.

Description

Three even rise ladder

Technical field

The utility model relate generally to ladder.More specifically, the utility model relates to a kind of altitude range at superelevation type ladder 4m to 15m, that the outdoor construction operation is used.

Background technology

The common employing two of ladder commonly used more than 4m connects telescopic lift, and its advantage is a liftable, highly can regulate, and shrinks back length and urinates in carrying.Its structure has three kinds usually:

First kind: internal layer cleat stanchion section bar is the U type, and outer cleat stanchion is the mountain type, and the internal layer cleat stanchion slides in groove of outer cleat stanchion.Be characterized in that simple in structure, ectonexine slip does not need to add in addition slideway and is easy to and makes.Shortcoming is that outer cleat stanchion materials are many and bending resistant section is long-pending big, and its intensity is much higher than the internal layer cleat stanchion, causes two joint intensity differences up and down, and the internal layer ladder is a weak link, can only be the load-bearing standard with relatively poor interior cleat stanchion in using.Uneconomical and the ladder strength deficiency of this structure waste material.

Second kind: it is grooved that internal layer cleat stanchion and outer cleat stanchion are the C type, and its two groups of C type cleat stanchion openings are installed relatively, and engaged, the internal layer cleat stanchion can slide in outer cleat stanchion.The inside and outside cleat stanchion of this structure is identical, and intensity is the same, than first kind rationally.But its C type structure is still unreasonable from the mechanics of materials, and its intensity and stability need be joined one group of slideway in addition not as good as O type (square type) cleat stanchion.

The third: internal layer cleat stanchion and outer cleat stanchion are the square type, and this cleat stanchion structure is saved material most, and intensity and stability are all than C type height, and shortcoming is that cleat stanchion itself can not be stung back formation slideway mutually, need mix down two groups of slideways in addition.

More than two the connecting and to rise their defective of ladder and be of three kinds of structures:

1. because their shrink at most half, to the ladder of superelevation particularly, still be not easy to carrying, especially in the city, can't transport with compact car.

2. structure is also unreasonable, can't take into account the two relation of ladder intensity and cleat stanchion slide construction.

The utility model content

According to an aspect of the present utility model, disclose a kind of three and even risen ladder, comprise: internal layer ladder, middle level ladder, outer ladder, slide block, the lifting pulley device, the jig device, wherein the internal layer ladder is made up of two internal layer cleat stanchions and several stull, and the middle level ladder is made up of two middle level cleat stanchions and several stull, outer ladder is made up of two outer cleat stanchions and several stull, the internal layer ladder is the narrowest, and the internal layer ladder is in the ladder of middle level, and the middle level ladder is in outer ladder, outer ladder is the wideest, internal layer cleat stanchion and middle level cleat stanchion interlock, middle level cleat stanchion and outer cleat stanchion interlock, preface forms the primary and secondary shape successively; On the occlusal surface of internal layer cleat stanchion and middle level cleat stanchion, middle level cleat stanchion and outer cleat stanchion, a slide block is housed respectively up and down; Between internal layer ladder and middle level ladder, the middle level is terraced and outer ladder between respectively be provided with one group of pulley gear; A pair of jig respectively is equipped with in the inboard below inboard, middle level cleat stanchion below the internal layer cleat stanchion.

According to another aspect of the present utility model, disclose a kind of two and connected and to rise ladder, described two connect that to rise ladder be to connect by removing above-mentioned three that the middle level that rises ladder is terraced to obtain the terraced and outer terraced interlock of its internal layer.

According to another aspect of the present utility model, disclose a kind of four and connected and to rise ladder, described four connect that to rise ladder be to add a middle level ladder between the middle level ladder that rises ladder and outer ladder again and make up with formation ' internal layer ladder-middle level ladder-middle level ladder-skin is terraced ' and obtain by connecting above-mentioned three.

According to another aspect of the present utility model, disclosing does not a kind ofly have three of slide block and connects and to rise ladder, and three of this no slide block connects that to rise ladder be to hang the limit separately and obtain to each automoment type center translation by above-mentioned three all slide blocks that even rise ladder that slide block arranged are removed the internal layer cleat stanchion, middle level cleat stanchion, the outer cleat stanchion that simultaneously this are had three of slide block even to rise ladder.

The ladder of this programme is three joint ascending/decendings, rises or descends with the operation of rope pulley, and the required height of special jig locking is arranged.

The ladder of this programme is divided into internal layer ladder, middle level ladder and outer ladder.Be made up of two cleat stanchions and several stull for every layer, stull penetrates in the cleat stanchion with the spacing that equates and rivets with cleat stanchion.The internal layer ladder is formed in two internal layer cleat stanchions and several stull, and the middle level ladder is formed in two middle level cleat stanchions and several stull, and outer ladder is formed in two outer cleat stanchions and several stull, and every layer all is a single ladder.The internal layer ladder is the narrowest to be enclosed within the ladder of middle level, and the middle level ladder is enclosed within the outer ladder, and outer ladder is the wideest, and preface forms the primary and secondary shape successively.Outer ladder is the most following during use, and the middle level ladder is placed in the middle, and the internal layer ladder is topmost.Shrink back three layer height basically identicals.Internal layer rises earlier when drawing high ladder, and internal layer is connected with rope with pulley with the middle level, and pulling rope internal layer relies on the middle level to rise, and a jig is equipped with in internal layer ladder lower end, can select and fix with the middle level is terraced after drawing high height; Middle level and skin also are connected with rope with another group pulley, and pulling rope middle level relies on outer the rise, and a jig also is equipped with in ladder lower end, middle level, also can select and fix with outer ladder after drawing high height.

In order to realize that above-mentioned three layer construction, the utility model improve the cleat stanchion section material section, section material section in the past is the square type, as agent structure, makes differentiation with the square type on square type structure.Internal layer is identical with outer cleat stanchion section bar, outwards increases by an outstanding limit on one of them long limit of square type section, and outstanding limit is vertical with the long limit of square type.Middle level cleat stanchion section bar is that the long limits of two in the square type outwards increase an outstanding limit respectively, and outstanding limit is vertical with the long limit of square type, and two outstanding limits lay respectively at square type both sides, the first from left right side and one on the other.The square molded dimension of two kinds of cleat stanchion section material sections is identical, and outstanding edge lengths is identical.This programme cleat stanchion section bar mechanical structure is reasonable, and the intensity high stability is good, and does not need to join in addition slideway.

Method with above-mentioned cleat stanchion assembling ladder is: the outstanding limit of internal layer cleat stanchion outwards, form interlock relatively with one of the middle level cleat stanchion inside outstanding limit, make when internal layer is relative with the middle level to slide can not break away from the other side mutually; The outstanding limit of outer cleat stanchion inwardly, form interlock relatively with one of the middle level cleat stanchion outside outstanding limit, also can not break away from the other side mutually when making the middle level with the relative slip of skin.Two of the middle level cleat stanchion outstanding limits hang the relative interlock in limit with inside and outside cleat stanchion respectively like this, and interior China and foreign countries are linked to be integral body for three layers, and internal layer, middle level, skin can not deviate from integral body during slip along the longitudinal sliding motion of ladder.

The utility model relates to another structure of slide project: the slideway of forming on the outstanding limit of every pair of cleat stanchion, up and down the slide block of a plastic rectangle is installed.The installation site of slide block is: the slide block of internal layer cleat stanchion is contained in cleat stanchion bottom, is positioned at the angle that the long limit of outstanding limit and square type is formed; The slideway of middle level cleat stanchion has two, and one is positioned at the angle that the long limit of inside outstanding limit and square type is formed in cleat stanchion top, middle level, and another is positioned at the angle that the long limit of outside outstanding limit and square type is formed in middle level cleat stanchion bottom; The slideway of outer cleat stanchion is positioned at the angle that the long limit of outstanding limit and square type is formed in the cleat stanchion top.The purpose that slide block is installed is: when sliding, the outstanding limit of every pair of cleat stanchion is direct friction not, but respectively with the slide block friction that is contained on the cleat stanchion of opposite, this structure rubbing surface reduces, thereby ladder is risen or descends laborsaving; Dwindle the glade plane space of each layer solar.

Another kind of structure is: do not use slide block, every pair of outstanding limit directly contacts slip, and just rubbing surface is big, has the structure of slide block to require great effort than above-mentioned during pulling.

The utility model three connects the lifting that rises ladder to be realized by two groups of pulleys.First group of pulley is installed on internal layer ladder and the middle level ladder, in the minimum stull of internal layer ladder, adorn movable pulley, in the highest stull of middle level ladder, set pulley, rope one end is fixed in the highest stull of internal layer ladder and passes movable pulley and fixed pulley then respectively, the other end of pulling rope can make internal layer ladder rise, unclamp rope then ladder descend automatically because of conducting oneself with dignity.Second group of pulley is installed on middle level ladder and the outer ladder, in the minimum stull of middle level ladder, adorn movable pulley, in the highest stull of outer ladder, set pulley, second rope one end is fixed in the highest stull of middle level ladder and passes movable pulley and fixed pulley then respectively, the other end of pulling rope can make the middle level ladder rise, and unclamps the rope ladder and descends automatically because of conducting oneself with dignity.

The utility model three connects when rising the ladder rising by the required institute of special jig locking height.A pair of jig is respectively installed in the position of the inboard equal height in place under in a pair of cleat stanchion of internal layer ladder, locates the position of inboard equal height equally down in a pair of cleat stanchion of middle level ladder a pair of jig also respectively is installed.The pulling rope rises the internal layer ladder, and the jig that is installed in behind the selected height on the internal layer cleat stanchion can be fixing with the internal layer ladder.Spur another root rope the middle level ladder is risen, arriving the jig that is installed on the cleat stanchion of middle level behind the desired height can be fixing with the middle level ladder.

Each jig pulls out tongue by a clamp and one and forms.Clamp is the aluminum casting of an elongated, and the clamp top is provided with a centre bore, and hinged with iron rivet with a corresponding aperture on internal layer cleat stanchion, the middle level cleat stanchion, this rivet claims the clamp rotating shaft, and clamp can this rotating shaft be that rotate at the center; It is the fan type groove in the center of circle with the centre bore that clamp is provided with one, spacing rivet is equipped with in internal layer cleat stanchion, cleat stanchion inboard, middle level, spacing rivet one end is comprised by the type groove of fanning, and clamp is exactly the positions of two ends, fan type groove zone when touching spacing rivet around two extreme positions of clamp rotating shaft rotational angle; One protruding nail is arranged on the clamp in addition, claim clamp protruding nail, protruding nail of clamp and centre bore, fan type groove three are positioned at the distribution triangular in shape of clamp top; Clamp extension spring one end is enclosed within the protruding other end that nails on of clamp is enclosed within on the spacing rivet, clamp is subjected to the external force effect, and rotation passes through around the center, and clamp oppositely goes back to initiating terminal under clamp extension spring effect when external force is removed; Oriented outside bulge, the lower end of clamp is divided and is claimed the clamp convex edge, and the stull of contiguous outer ladder can be withstood in the clamp lower end when locking.Clamp is under the effect of extension spring at ordinary times, and an end of fan type groove withstands spacing rivet, and clamp is in the locked position at ordinary times; Masterpiece time spent clamp rotates and withstands spacing rivet up to the fan type groove other end outside, and this moment, clamp was in the position that unlocks.Locate dress and dial tongue below the clamp lower end, it is hinged with a rivet and internal layer cleat stanchion, middle level cleat stanchion to pull out tongue, and this rivet claims to pull out the tongue rotating shaft, and pulling out tongue can be around pulling out tongue rotating shaft rotation; Establish a protruding nail and claim afterbody protruding nail pulling out the tongue afterbody; One rivet is installed on internal layer cleat stanchion, cleat stanchion inboard, middle level, is claimed to hang the spring rivet; To pull out tongue extension spring one end and be enclosed within that afterbody is protruding to be nailed on, the other end is enclosed within to be hung on the spring rivet; Pull out tongue and be horizontal at ordinary times pulling out under the tongue extension spring effect, pull out the tongue extension spring when tongue turns to other positions and it can be retracted horizontal level when pulling out.Its lip of the tongue can touch the clamp convex edge when pulling out the tongue rotation.Clamp can block the stull of contiguous outer ladder automatically when ladder rises, and makes the ladder locking; Tongue is pulled out in the stull of one deck ladder shake-up earlier outside the vicinity when ladder descends, make and pull out tongue around pulling out upwards rotation of tongue rotating shaft, make the lip of the tongue touch the clamp convex edge, clamp is pulling out inwardly rotation under the tongue promotion, leave latched position and make the ladder joint that descends, then clamp and pull out tongue and get back at ordinary times position under the effect of extension spring is separately waited for and is risen next time or descend.

The scheme that the utility model provides has effectively overcome the defective of prior art, and it is a kind of three to connect and to rise ladder, and the length after the contraction is convenient to the automobile transportation near using 1/3rd of height, is convenient to collect.The cleat stanchion section bar adopts the square type, outwards increases outstanding limit as the slideway that draws high on the long limit of square type, does not need to join in addition slideway.Internal layer cleat stanchion, middle level cleat stanchion, outer cleat stanchion section bar are spared with the square type and are added outstanding limit structure, and ladder intensity height is saved material again.

Description of drawings

Fig. 1 is the utility model overall structure figure;

Fig. 2 A is a vertical view of the present utility model;

Fig. 2 B is a upward view of the present utility model;

Fig. 3 is a jig locking device lateral view;

Fig. 4 A is the continuous uphill process jig action of a utility model schematic diagram;

Fig. 4 B is the utility model rising-locking process jig action schematic diagram;

Fig. 4 C is that the utility model is unblanked-decline process jig action schematic diagram;

The variation diagram of Fig. 5 A Fig. 2 A during for no slide block;

The variation diagram of Fig. 5 B Fig. 2 B during for no slide block;

Fig. 6 A two connects the variation diagram of Fig. 2 A when rising;

Fig. 6 B two connects the variation diagram of Fig. 2 B when rising;

Fig. 7 A four connects the variation diagram of Fig. 2 A when rising; And

Fig. 7 B four connects the variation diagram of Fig. 2 B when rising.

The specific embodiment

In conjunction with the accompanying drawings a scheme of the present utility model is described in detail.

This programme overall structure is referring to Fig. 1: two internal layer cleat stanchions 1 are formed the internal layer ladders with several stulls 4, and two middle level cleat stanchions 2 are formed the middle level ladders with several stulls 4, and two outer cleat stanchions 3 are formed outer ladder with several stulls 4; The internal layer ladder is positioned at the middle level ladder, and the middle level ladder is positioned at outer ladder; Outer ladder is the most following during rising, and the middle level ladder is placed in the middle, and the internal layer ladder is topmost.Referring to Fig. 2 A, Fig. 2 B as seen, outer ladder comprises the middle level ladder, and the middle level ladder comprises the internal layer ladder, is the primary and secondary shape.

This programme cleat stanchion section material section is referring to Fig. 2 A or Fig. 2 B.Internal layer cleat stanchion 1 is identical with outer cleat stanchion 3, is that a square type is provided with an outstanding limit in the outside, a long limit of square type, and it is vertical that outstanding limit and square type are grown the limit.To be square types respectively be provided with an outstanding limit in the outside, two long limits of square type to middle level cleat stanchion 2, and outstanding limit is vertical with the long limit of square type, and two outstanding limits lay respectively under one last one of the square type both sides, and the length of hanging the limit is identical.Two outstanding limits of middle level cleat stanchion respectively with the relative interlock in outstanding limit of inside and outside cleat stanchion, can not break away from integral body when ladder is slided.

This programme three connects liter four pairs of slide blocks is housed, and its installation site is referring to Fig. 1, Fig. 2 A and Fig. 2 B.Middle level top shoe 5a, middle level sliding block 5d lay respectively at the inboard, upper end and the outside, lower end of middle level cleat stanchion; Internal layer slide block 5b is positioned at the outside, internal layer cleat stanchion lower end; It is inboard that outer slide block 5c is positioned at outer cleat stanchion upper end.The outstanding limit on slide block and opposite keeps appropriate glade plane space.The effect of slide block is a frictional force in order to reduce to slide, thereby makes when rising or descending laborsaving.

This programme three connects liter two groups of pulley gears is housed, and referring to Fig. 1, every group of pulley gear comprises: fixed pulley 8a, movable pulley 8b and rope 8c.Pulling cord can make ladder rise, and ladder descends by deadweight.

This programme three connects and rises a special jig, and structure is referring to Fig. 1 and Fig. 3, by clamp 6 with pull out tongue 7 and form.With clamp rotating shaft 6a clamp and internal layer cleat stanchion, middle level cleat stanchion are linked on the centre bore of clamp 6, clamp 6 can rotate around clamp rotating shaft 6a; The protruding nail of clamp 6c is contained on the clamp 6; Opening one on the clamp 6 is the fan type groove 6e in the center of circle with the centre bore; Spacing rivet 6b one end hinge joint other end on internal layer cleat stanchion, middle level cleat stanchion places in the fan type groove 6e; Clamp extension spring 6d two ends are enclosed within respectively on clamp protruding nail 6c and the spacing rivet 6b; Two positions that limit position rivet 6b is touched at the two ends of fan type groove 6e are two extreme positions that clamp 6 rotates; It is clamp convex edge 6f that clamp 6 has a projection bottom.Pull out tongue 7 and dialled tongue rotating shaft 7a and internal layer cleat stanchion, the hinge joint of middle level cleat stanchion, pull out tongue 7 and can rotate around pulling out tongue rotating shaft 7a; Pulling out the protruding nail of tongue 7c is located at and pulls out on the tongue 7; Hang spring rivet 7b and internal layer cleat stanchion, the hinge joint of middle level cleat stanchion; Pulling out tongue extension spring 7d two ends is enclosed within group protruding nail of tongue 7c respectively and hangs on the spring rivet 7b.The lip of the tongue can touch utmost point clamp convex edge 6f when pulling out tongue 7 and upwards rotating, and promotes clamp 6 and rotates, and makes the position of clamp 6 Fig. 3 away from keyboard, and clamp extension spring 6d makes clamp 6 return the position of Fig. 3 automatically after external force is removed.

The using method of ladder jig is described as follows: Fig. 4 A shows the continuous uphill process jig action of ladder schematic diagram, make ladder at this locking position by the operation of method shown in Fig. 4 B when ladder is raised to desired location, ladder needs to press the operation of method shown in Fig. 4 C when latched position descends.

This programme three is even gone up to state in the embodiment and can not used slide block, referring to Fig. 5 A, Fig. 5 B, just cleat stanchion is hanged the limit separately to the appropriate distance of each automoment type center translation, makes every pair of outstanding limit keep suitable glade plane space, and outstanding limit directly contacts with outstanding limit.

This programme three connects to rise and can be reduced to two and connect and rise, and referring to Fig. 6 A, Fig. 6 B, connects the middle level ladders that rise with three and removes, and internal layer ladder and outer ladder directly interlock form two and connect and rise.

This programme three connects and rises described method and analogize and can realize that four connect and rise, and referring to Fig. 7 A and Fig. 7 B, increases by a joint middle level ladder again outside the ladder of middle level, forms the combination of " internal layer ladder-middle level ladder-middle level ladder-skin is terraced ".

This programme three connects to rise can form chevron shaped ladder, three of two equal heights is connected rise the top hinge joint of internal layer ladder, and chevron shaped ladder can independently use.

The above is a various embodiment of the present utility model.

It should be appreciated by those skilled in the art that and depend on that relating to requirement can expect various modifications, combination, sub-portfolio and change with other factors, as long as they fall within the scope of claims and equivalent thereof.

The accompanying drawing identifier declaration

The outer cleat stanchion 4-of 1-internal layer cleat stanchion 2-middle level cleat stanchion 3-stull

The outer slide block 5d-of 5a-middle level top shoe 5b-internal layer slide block 5c-middle level sliding block

The protruding nail of 6-clamp 6a-clamp rotating shaft 6b-limiting rivet 6c-clamp 6d-clamp extension spring 6e-fan groove

6f-clamp flange

7-pulls out tongue 7a-and pulls out tongue rotating shaft 7b-and hang the protruding nail of spring rivet 7c-afterbody 7d-and pull out the tongue extension spring

8a-fixed pulley 8b-movable pulley 8c-rope

Claims

1. one kind three connects and to rise ladder and comprise: internal layer ladder, middle level ladder, outer terraced, and slide block, the lifting pulley device, the jig device,

Wherein said internal layer ladder is made up of two internal layer cleat stanchions (1) and several stull (4), described middle level ladder is made up of two middle level cleat stanchions (2) and several stull (4), described outer ladder is made up of two outer cleat stanchions (3) and several stull (4), described internal layer ladder is the narrowest, described internal layer ladder is in the ladder of described middle level, described middle level ladder is in described outer ladder, described outer ladder is the wideest, described internal layer cleat stanchion (1) and described middle level cleat stanchion (2) interlock, described middle level cleat stanchion (2) and described outer cleat stanchion (3) interlock, preface forms the primary and secondary shape successively;

On the occlusal surface of described internal layer cleat stanchion and described middle level cleat stanchion, described middle level cleat stanchion and described outer cleat stanchion, a slide block is housed respectively up and down;

Between described internal layer ladder and described middle level ladder, described middle level is terraced and described outer ladder between respectively be provided with one group of pulley gear;

A pair of jig respectively is equipped with in the inboard below inboard, described middle level cleat stanchion below the described internal layer cleat stanchion.

2. according to claim 1 three even rise ladder, it is characterized in that: the section material section of described internal layer cleat stanchion (1) and outer cleat stanchion (3) is the square type, outwards be provided with an outstanding limit on a long limit of square type, described outstanding limit is vertical with described long limit, and one on described outstanding limit is connected with described long limit.

3. according to claim 1 three even rise ladder, it is characterized in that: the section material section of described middle level cleat stanchion (2) is the square type, outwards be provided with an outstanding limit respectively on two long limits of square type, described outstanding limit is vertical with straight flange, one on each outstanding limit is grown the limit with vicinity and is connected, described outstanding limit is respectively on one the first from left right side, described hollow square type pipe both sides, and one on the other.

4. according to claim 1 three even rise ladder, it is characterized in that: in the angle that outstanding limit, described internal layer cleat stanchion (1) lower end and straight flange are formed slide block is housed, in the angle of forming with another outstanding limit, lower end and straight flange in the angle that outstanding limit, described middle level cleat stanchion (2) upper end and straight flange are formed a slide block is housed respectively, in the angle that outstanding limit, described outer cleat stanchion (3) upper end and straight flange are formed a slide block is housed.

5. according to claim 1 three connect and to rise ladder, it is characterized in that: described jig device is by clamp (6) and pull out tongue (7) and form,

Wherein said clamp (6) is a long elements, there is a centre bore top, clamp rotating shaft (6a) penetrates described centre bore with described clamp (6) and described internal layer cleat stanchion, the cleat stanchion hinge joint of described middle level, it is that the fan type groove (6e) in the center of circle is positioned at described centre bore below with described centre bore that described clamp (6) is provided with one, the hinge joint of spacing rivet (6b) end is at described internal layer cleat stanchion, on the cleat stanchion of described middle level, the other end places in the described fan type groove (6e), when described clamp (6) is the center rotation with described clamp rotating shaft (6a), described fan type groove (6e) comprises described spacing rivet (6b) all the time, described clamp (6) is provided with the protruding nail of a clamp (6c), clamp extension spring (6d) two ends are enclosed within respectively on protruding nail of described clamp (6c) and the described spacing rivet (6b), and described clamp (6) has a clamp convex edge (6f) of protruding bottom;

The described tongue (7) that pulls out is a long elements, to pull out tongue rotating shaft (7a) and described internal layer cleat stanchion, the hinge joint of described middle level cleat stanchion, the described tongue (7) that pulls out can pull out tongue rotating shaft (7a) and rotates around described, the described afterbody that pulls out tongue (7) has the protruding nail of an afterbody (7c), adorn one and hang spring rivet (7b) on described internal layer cleat stanchion, described middle level cleat stanchion, the two ends of pulling out tongue extension spring (7d) are enclosed within respectively on protruding nail of described afterbody (7c) and the described extension spring rivet (7b).

6. one kind is not had three of slide block and connects and to rise ladder, it is characterized in that: three of described no slide block connects that to rise ladder be to remove the internal layer cleat stanchion (1), middle level cleat stanchion (2), the outer cleat stanchion (3) that simultaneously claim 1 described three are even risen ladder and hang the limit separately and obtain to each automoment type center translation by claim 1 described three being connected all slide blocks that rise ladder.

7. one kind two connects and to rise ladder, it is characterized in that: described two connect that to rise ladder be to connect the middle level ladder that rises ladder and make described three even to rise the terraced and outer terraced interlocks of the internal layer of ladder and obtain by removing claim 1 described three.

8. one kind four connects and to rise ladder, it is characterized in that: described four connect that to rise ladder be to add a middle level ladder between the middle level ladder that rises ladder and outer ladder again and make up with formation ' internal layer ladder-middle level ladder-middle level ladder-skin is terraced ' and obtain by connecting in claim 1 described three.