CN201273132Y

CN201273132Y - Novel extension ladder

Info

Publication number: CN201273132Y
Application number: CNU2008202004863U
Authority: CN
Inventors: 胡正江
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-12
Filing date: 2008-09-12
Publication date: 2009-07-15
Anticipated expiration: 2018-09-12

Abstract

The utility model discloses a novel telescopic ladder, comprising a plurality of ladder post and transverse rods, and a plurality of connecting locking mechanisms, wherein the ladder posts are sheathed with each other; the transverse rods are connected with the ladder posts at two sides via the connecting locking mechanism; the connecting locking mechanism comprises a connecting sleeve, a locking rod, a torsion spring and dial keys; the connecting sleeve is composed of a connecting ring sheathing a ladder post and a connector connected with a transverse rod; the dial key is axially connected with the connector; the torsion spring is axially connected with the dial key; one end of the torsion spring is abut against the connector and the other end is abut against the dial key; one end of the locking rod is clamped with the dial key and the other end can telescopically penetrate through the connecting ring via the torsion spring to lock or contact the ladder post. Therefore, the ladder posts of the telescopic ladder can be folded or unfolded, to save storage space and bring easy carriage, and the telescopic ladder has firm structure.

Description

The novel telescopic ladder

Technical field

The utility model relates to a kind of ladder, relates in particular to the flexible novel telescopic ladder of a kind of socket joint type.

Background technology

In daily life, we often can use ladder and take and be placed on the thing of eminence, the common especially thing of ladder in finishing and building trade, the general now ladder that uses has two kinds, a kind of is H type ladder, this ladder is made of mutual approximately parallel montant and the equally spaced cross bar that is fixed on the montant, when this H type ladder uses ladder is relied on the supporter obliquely, the people then can step on cross bar and on; Another kind is an A shape ladder, and this ladder is similar to be articulated on the top by two H type ladders and forms, and sees from side during expansion to be the A type, and during use, can rely on the supporter obliquely and use, also deployable standing on the ground used.It is long that above-mentioned H type ladder is generally done, more in outdoor or architectural use, because terraced height, be unfavorable for carrying and depositing, and the montant of both sides is all as a whole, and when higher, the montant of terraced middle and upper part can be because of stressed excessive on ladder for the people, cause distortion or fracture, cause the generation of accident easily; Above-mentioned A type ladder is then generally shorter, and that uses on indoor or finishing is more, but because it is highly short, volume is big, and can not fold, be unfavorable for equally carrying and depositing, and complex structure.

It is for can be at the higher local operation or the article of taking that people use ladder, length to ladder has certain requirement, therefore, when depositing and carry, will bring problem, because above-mentioned two class ladders all can not fold, can take a large amount of parking spaces when depositing, thereby also tend to when moving because ladder long can not before and after take into account and mix down other article and cause damage, and these ladders are generally solid material formations such as timber, quality is big, too heavy, equally also cause the difficulty of carrying.

Therefore, be badly in need of a kind ofly can save parking space, being easy to carrying and well-set socket joint type extension ladder.

The utility model content

The purpose of this utility model is to provide a kind of can save parking space, be easy to carrying, and the flexible novel telescopic ladder of well-set socket joint type.

For achieving the above object, the utility model provides a kind of novel telescopic ladder, comprise some cleat stanchions, cross bar and connection locking mechanism, socket mutually between the described cleat stanchion, described cross bar is connected with the both sides cleat stanchion by connecting locking mechanism, fold or launch by described connection locking mechanism between the described cleat stanchion, described connection locking mechanism comprises adapter sleeve, securing rod, torsionspring and group key, described adapter sleeve is made up of the connector that is placed in the clamping ring on the described cleat stanchion and be connected with described cross bar, described group of key is articulated on the described connector, described torsionspring is articulated on the described group of key, and described torsionspring one end and described connector are conflicted, the other end and described group of key are conflicted, described securing rod one end engages with described group of key, the other end is telescopic under the effect of described torsionspring to be passed described clamping ring and the locking of described cleat stanchion or conflicts realization folding or launching cleat stanchion.

Preferably, described torsionspring has mutual first and second leg of a pair of leg at an angle, described first leg is all conflicted with described connector, described second leg and described group of key are conflicted, make that like this pull out key is in torsionspring all the time by under first leg and the formed elasticity tension effect of second leg, and then cause pulling out the securing rod that key engages and being subjected to the thrust that past both sides cleat stanchion moves with described.

Preferably, the end that described securing rod passes described clamping ring has flange, described flange prevent described securing rod too much pass described clamping ring.

Preferably, the utility model novel telescopic ladder also comprises locked mechanism, described locked mechanism is embedded in the described clamping ring, described locked mechanism comprises contact chip and chock, and described contact chip one end passes described clamping ring, and the other end and described chock are conflicted, described chock is embedded in the described clamping ring, the described contact chip cleat stanchion of effectively conflicting can play stable effect to the slip of cleat stanchion in clamping ring, and the securing rod that passes in the clamping ring is cooperated with cleat stanchion.

Preferably, the utility model novel telescopic ladder also comprises the plastic cement cushion collar, described plastic cement cushion collar lower end is evenly distributed with the buffering pin of outside protrusion, described plastic cement cushion collar is positioned at, down between the adjacent cleat stanchion, the described cleat stanchion lower end of going up is placed in the described plastic cement cushion collar, described buffering pin contacts with described descending stair column wall, described plastic cement cushion collar reduces on the one hand by last, the sound that following cleat stanchion direct friction is sent, play the slide-and-guide effect, go up cleat stanchion when cushioning cleat stanchion on the other hand and folding to the impact of cleat stanchion down, described plastic cement cushion collar lower end is provided with intilted inclined-plane, described inclined-plane can require to reach the particular state of ladder when folding according to the different users, when cleat stanchion goes downwards to certain depth, described inclined-plane and described securing rod are near an end in contact of flange, along with further moving down of described inclined-plane, force described securing rod to move, thereby play boosting to the direction of leaving described cleat stanchion.

Preferably, described extension ladder also comprises manual control mechanism, described manual control mechanism is located in the described cross bar middle part, described manual control mechanism comprises pair of links and a pair of handle, described connecting rod one end is connected with described securing rod, the other end and described handle clamping, and described handle stretches out described cross bar, firmly above-mentioned a pair of handle is pushed, handle will drive connected connecting rod pulling securing rod and move toward the direction of leaving cleat stanchion, thereby realize that by pushing handle one hand can fold the utility model novel telescopic ladder to the folding of cleat stanchion, easy to operate simple, and laborsaving.

Preferably, described clamping ring inboard is provided with some to co-axial grooves, described cleat stanchion top is provided with the boss that mates mutually with described clamping ring inner groovy, can make the latched position of the accurate corresponding cleat stanchion of securing rod on the one hand, can also strengthen connection stability between the cleat stanchion on the other hand.

Preferably, described cleat stanchion upper inside wall is coaxial evenly to be provided with some outstanding blocks, described block is to being placed in up restriction of adjacent cleat stanchion in the described cleat stanchion, prevent that the user from up stretching firmly excessive to the last cleat stanchion that is placed in down in the cleat stanchion on the one hand, cause the excessive compression of cleat stanchion, make upper and lower cleat stanchion damaged because of excessive extrusion to following cleat stanchion; On the other hand, the concrete latched position that further limits upper and lower cleat stanchion is convenient to connect locking mechanism upper and lower cleat stanchion is locked accurately.

Preferably, described novel telescopic ladder also comprises the reinforcement cross bar, described reinforcement cross bar is connected between bottom the both sides cleat stanchion, described cleat stanchion and described cross bar are metal material or composite material, described plastic cement cushion collar is a polymeric material, make that the utility model novel telescopic ladder is more firm, safe and reliable.

The utility model is compared with prior art, because the utility model novel telescopic ladder is made up of adapter sleeve, securing rod, torsionspring and group key launching or fold the connection locking mechanism of controlling, described securing rod is telescopic under the effect of torsionspring to pass described clamping ring and with the locking of described cleat stanchion or conflict, thereby realization folding or launching cleat stanchion, and is simple in structure firm; In addition, when folding, push group key of the connection locking mechanism that is positioned on the cross bar with hand, under the self-gravity action of ladder, the cross bar that connects by described connection locking mechanism downwards under the effect of gravity with descending, can apply certain pressing force in case of necessity, thereby will fold by the two joint cleat stanchions that above-mentioned locking mechanism connects, when the cross tube of two adjacent cross bars goes downwards to when pressing close to mutually with following cross bar, following cross bar compresses the key of dialling of top cross bar, thereby the connection locking mechanism on the cross bar above making is to the state that unlocked by the cleat stanchion of its locking, can fold the joint of one on the cleat stanchion that has just been folded cleat stanchion again, so analogize, just can all cleat stanchions from down and on folded one by one, and whole process only needs nethermost group of key of cleat stanchion that needs are folded to push, cooperate again and constantly press down cross bar and can the cleat stanchion that needs fold have been folded, the cleat stanchion that need fold folds automatically under the effect of pressing force and finishes, effectively saved manpower, and fold rear transverse rod and suffer cross bar and make volume little, be convenient to deposit and carry.

Description of drawings

Stereogram when Fig. 1 folds for the utility model novel telescopic ladder.

Fig. 2 is the utility model novel telescopic ladder three-dimensional exploded view of two cleat stanchions of connection continuously

Fig. 3 is the utility model novel telescopic ladder cleat stanchion, connects the connection diagram between locking mechanism and the cross bar.

Fig. 4 is the three-dimensional exploded view that connects locking mechanism in the utility model novel telescopic ladder.

Fig. 5 is the stereogram that connects the torsionspring of locking mechanism in the utility model novel telescopic ladder.

Fig. 6 is the stereogram that the utility model novel telescopic ladder connects plastic cement cushion collar in the locking mechanism.

Structural representation when Fig. 7 folds for two cleat stanchions that connect continuously among Fig. 2 connect.

Fig. 7 a is the sectional view of Fig. 7 along the A-A direction.

Fig. 8 is the enlarged drawing of C part among Fig. 7 a.

Fig. 9 is the enlarged drawing of D part among Fig. 7 a.

Figure 10 is the manual control mechanism and cross bar and the three-dimensional exploded view that is connected the locking mechanism connection of the utility model novel telescopic ladder.

Figure 11 is the structural representation of the cleat stanchion of the utility model novel telescopic ladder.

Figure 11 a is the sectional view of Figure 11 along the B-B direction.

Figure 12 is the enlarged drawing of E part among Figure 11 a.

Figure 13 is that boss stopped that the plastic cement cushion collar continues up view when the cleat stanchion of socket stretched fully mutually in the utility model novel telescopic ladder.

View when Figure 14 folds for the utility model novel telescopic ladder.

The specific embodiment

As shown in Figures 1 and 2, the utility model novel telescopic ladder comprises some cleat stanchions 110, cross bar 150 and connection locking mechanism 130, socket mutually between the described cleat stanchion 110, described cross bar 150 is connected with the both sides cleat stanchion by described connection locking mechanism 130, fold or launch by described connection locking mechanism 130 between the described cleat stanchion 110, particularly, described cleat stanchion 110 and described cross bar 150 are hollow structure, described cleat stanchion 110 has different tube diameters, from down and on successively caliber reduce successively, thereby socket and fit stretching mutually, the annexation between the adjacent cleat stanchion is all identical; Connect by connecting locking mechanism 130 between adjacent cleat stanchion 110``, the 110`, definition two adjacent cleat stanchions are that last cleat stanchion 110`` reaches cleat stanchion 110` down in the present embodiment, the described cleat stanchion 110`` that goes up is placed in down in the cleat stanchion 110`, below all like this definition of upper and lower cleat stanchion 110``, 110` is done explanation to the specific embodiment; Particularly, as Fig. 3, Fig. 4 and shown in Figure 5:

Fold or the connection locking mechanism 130 of expansion effect comprises adapter sleeve 131 plaing between the cleat stanchion, securing rod 135, torsionspring 134 and group key 133, particularly, the described cleat stanchion 110`` of going up connects by the described locking mechanism 130 that is connected with following cleat stanchion 110`, described adapter sleeve 131 is formed by being placed in clamping ring 131` on the described cleat stanchion 110` upper end down and the connector 131`` that is connected with described cross bar 150, described group of key 133 is articulated on the described connector 131``, described torsionspring 134 is articulated on the described group of key 133, and described torsionspring 134 1 ends and described connector 131`` conflict, the other end and described group of key 133 are conflicted, described securing rod 135 1 ends engage with described group of key 133, the other end under the effect of described torsionspring 134 telescopic pass described clamping ring 131` with on, following cleat stanchion 110``, 110` locking or conflict, realization is to last, following cleat stanchion 110``, 110` folding or launching, more specifically, the described cleat stanchion 110`` lower end of going up has following lock hole 114``, described cleat stanchion 110` down upper end has last lock hole 111`, described lock hole 111` and the described lock hole 114`` down of going up mutually can mutual lateral direction penetrating during certain-length in last cleat stanchion 110`` is socketed in down cleat stanchion 110`, the position of described down lock hole 114`` and last lock hole 111` lateral direction penetrating is the height that cleat stanchion 110`` and following cleat stanchion 110` launch mutually, described clamping ring 131 ' " junction has the lock hole 131b that runs through described clamping ring 131`; the mutual lateral direction penetrating of last lock hole 111` of described lock hole 131b and following cleat stanchion 110`; when the last lock hole 111` lateral direction penetrating of the following lock hole 114`` of last cleat stanchion 110`` and following cleat stanchion 110`; following lock hole 114``; last lock hole 111` and lock hole 131b three hole lateral direction penetratings; described lock hole 131b and described securing rod 135 cooperations that are connected locking mechanism 130 with described connector 131, when described securing rod 135 inserts described lock hole 131b successively, last lock hole 111` reaches when lock hole 114`` is interior down, on adjacent, following cleat stanchion 110``, 110` is locked, promptly launches; When securing rod 135 does not insert in the lock hole, be that securing rod 135 is inconsistent with the last cleat stanchion 110`` that is socketed on down in the cleat stanchion 110`, the end that described securing rod 135 is used to pass the lock hole 131b of described clamping ring 131` has flange 135b, the other end has caulking groove 135a, described flange 135b prevents the lock hole 131b that passes described clamping ring 131` that described securing rod 135 is too much, described caulking groove 135a is used for engaging with described group of key 133, this engaging mode is simple and convenient, does not need other part can realize dialling key 133 drive securing rods 135 and does horizontal moving back and forth.Described clamping ring 131` inboard is provided with some to co-axial grooves 131a, described cleat stanchion 110` down upper end is provided with the boss 112` that mates mutually with described clamping ring 131` inner groovy 131a, described groove 131a and described boss 112` cooperatively interact, thereby described clamping ring 131` is fixed on the described cleat stanchion 110` down, lock hole 114`` under one side can make securing rod 135 accurate aligning lock hole 131b, upward lock hole 111` reaches can also strengthen connection stability between upper and lower cleat stanchion 110``, the 110` on the other hand; Described torsionspring 134 has the mutual a pair of first leg 134a and the second leg 134b at an angle, the described first leg 134a all conflicts with described connector 131``, the described second leg 134b and described group of key 133 are conflicted, comprise that also one is articulated in torsionspring 134 to dial on the key 133 and will dial key 133 and is articulated in pin 132 on the connector 131``, more specifically, described pin 132 passes described torsionspring 134 described torsionspring 134 is articulated on group key 133, and pass described group of key 133 simultaneously described group of key 133 is articulated on the described connector 131``, make that like this pulling out key 133 is in torsionspring 134 all the time by under the first leg 134a and the formed elasticity tension effect of the second leg 134b, and then cause pulling out securing rod 135 that key 133 engages and being subjected to the thrust that moves toward the both sides cleat stanchion with described, when the external world gives described power of pulling out key 133 and dials the power of key 133 greater than described torsionspring 134, along with continuing of extraneous power, described group of key 133 will be along rotating near the cleat stanchion direction, the rotation of described group of key 133 at this moment will drive securing rod 135 and withdraw from down lock hole 114`` successively, last lock hole 111` and lock hole 131b, this moment can be to last, following cleat stanchion 110``, 110` folds.

The preferably, the utility model novel telescopic ladder also comprises locked mechanism 140, described locked mechanism 140 is embedded in the described clamping ring 131`, described locked mechanism 140 comprises contact chip 142 and chock 143, described contact chip 142 1 ends pass described clamping ring 131`, and in one U groove part crack 145 of the inboard formation of described clamping ring 131`, the other end and described chock 143 are conflicted, particularly, described contact chip 142 is the inclined-plane (not marking among the figure) that cooperatively interacts with the face that described chock 143 is conflicted, described chock 143 forces described contact chip 142 outward-dipping giving prominence to, thereby compress described down cleat stanchion 110 ', described chock 143 is by in the embedded chock groove 144 that is fixed in described clamping ring 131` of screw 141, described contact chip 142 cleat stanchion 110 of effectively conflicting, can play stable effect to the slip of cleat stanchion 110 in clamping ring 131`, the securing rod 135 that passes in the clamping ring is cooperated with cleat stanchion.

The preferably, in conjunction with Fig. 6, Fig. 7, Fig. 7 a, Fig. 8 and shown in Figure 9, the utility model novel telescopic ladder also comprises and being positioned at, following adjacent cleat stanchion 110``, plastic cement cushion collar 120 between the 110`, the described cleat stanchion 110`` lower end of going up is placed in the described plastic cement cushion collar 120, particularly, the described cleat stanchion 110`` lower end of going up is provided with some coaxial circular hole 115``, described plastic cement cushion collar 120 inboards are respectively equipped with the round boss 121 that matches with described circular hole 115``, described plastic cement cushion collar 120 is connected in the lower end of cleat stanchion 110`` by round boss 121 and cooperating of circular hole 115``, described plastic cement cushion collar 120 lower ends are evenly distributed with the buffering pin 122 of outside protrusion, described buffering pin 122 contacts with described cleat stanchion 110` inwall down, thereby produce outside tension force, when cleat stanchion 110 is flexible up and down, play buffering, and described buffering pin 122 is with on the two mutual fits, following cleat stanchion 110``, 110` separates, avoid, following cleat stanchion 110``, the noise that the direct contact friction of 110` produces, described plastic cement cushion collar 120 lower ends are provided with intilted inclined-plane 123, described inclined-plane 123 can require to reach the particular state of ladder when folding according to the different users, when cleat stanchion goes downwards to certain depth, described inclined-plane 123 and the end in contact of described securing rod 135 near described flange 135b, along with further moving down of described inclined-plane 123, force described securing rod 135 to move, thereby play boosting to the direction of leaving cleat stanchion.

The preferably, in conjunction with shown in Figure 10, the utility model novel telescopic ladder also comprises manual control mechanism 160, described manual control mechanism 160 is located in described cross bar 150 middle parts, described manual control mechanism comprises pair of links 161 and a pair of handle 162, described connecting rod 161 1 ends axially are connected with described securing rod 135, the other end is by connecting

rod caulking groove

161a and 162 clampings of described handle on it, and described handle 162 stretches out described cross bar 150, firmly above-mentioned a pair of handle 162 is pushed, described handle 162 will drive the connected connecting rod 161 pulling securing rods 135 past directions of leaving cleat stanchion and move, thereby realize folding to cleat stanchion by pushing handle 162, one hand can fold the utility model novel telescopic ladder, easy to operate simple, and it is laborsaving, particularly, described manual control mechanism 160 also comprises and is placed on the described manual control mechanism 160 and the cover plate 163 that is connected with described cross bar 150, described handle 162 passes described cover plate 163, described cover plate 163 can prevent effectively that impurity from entering in the manual control mechanism 160 of being located at cross bar 150 middle parts, avoids the influence to the operate as normal of manual control mechanism 160.Be located in bottom the cross bar described manual control mechanism 160 best.

The preferably, as Figure 11,11a, Figure 12 and shown in Figure 13, described down cleat stanchion 110` upper inside wall is coaxial evenly to be provided with some outstanding block 113`, up restriction when described block 113` goes up cleat stanchion 110`` expansion stretching to being placed in the described cleat stanchion 110` down, prevent that the user from up stretching firmly excessive to the last cleat stanchion 110`` that is placed in down in the cleat stanchion 110` on the one hand, cause the excessive compression of cleat stanchion 110``, make upper and lower cleat stanchion 110``, 110` damaged because of excessive extrusion to following cleat stanchion 110`; On the other hand, the concrete latched position that further limits upper and lower cleat stanchion 110``, 110` is convenient to connect locking mechanism 130 couples of upper and lower cleat stanchion 110``, 110` and locks accurately.

The preferably, as shown in figure 14, described cross bar 150 upper surfaces are provided with anti-skidding line (not marking among the figure), slip when preventing to ascend a height.Be provided with between the maximum caliber cleat stanchion and strengthen cross bar 170, described cleat stanchion 110 and described cross bar 150 are metal material or composite material, and described plastic cement cushion collar 120 is a polymeric material, makes that the utility model novel telescopic ladder is more firm, safe and reliable.

In conjunction with institute's drawings attached, the operating principle of the utility model novel telescopic ladder is done a detailed description, the ladder collapse state as shown in Figure 1, when using ladder, each joint ladder can directly stretch, when being stretched to certain distance, the described boss 113` of ladder inwall just in time is blocked in the uppermost position of described plastic cement cushion collar 120, make the described cleat stanchion 110`` of going up to continue up, limited the position of cleat stanchion, at this moment, the described following lock hole 114 of going up cleat stanchion 110`` lower end "; the last lock hole 111 of following cleat stanchion 110` upper end ' and clamping ring on lock hole 131b lateral direction penetrating; under the elastic force effect of described torsionspring 134; described securing rod 135; described connecting rod 161 and described handle 162 are along near cleat stanchion 110` direction translation down; the described group of key 133 is along away from cleat stanchion 110` direction rotation down, described securing rod 135 passes described lock hole 131b successively, following lock hole 111 ' and go up lock hole 114``, flange 135b on the described securing rod 135 and described lock hole 131b conflict and stop described securing rod 135 to continue along close cleat stanchion 110` direction translation down, thereby realize last, following cleat stanchion 110``, the locking of 110`; When folding ladder, push a pair of handle 162 of the manual control mechanism 160 in the cross bar of being located at bottom with hand, described handle 162 drives described securing rod 135 to the direction translation away from terraced 110` post by described connecting rod 161, described group of key 133 rotates along the direction near cleat stanchion 110`, and push the cross bar 150 that does not fold again downwards, by connect cross bar 150 that locking mechanism 130 connects pressing force downwards and under the effect of gravity with descending, thereby will be by in described connection locking mechanism 130 connections, following cleat stanchion 110``, 110` folds, when the cross tube of two adjacent cross bars 150 goes downwards to when pressing close to mutually with following cross bar, following cross bar compresses group key 133 of top cross bar, the state thereby the 130 pairs of cleat stanchions 110 by its locking of connection locking mechanism on the cross bar above making unlock, can fold the joint of one on the cleat stanchion 110 that has just been folded cleat stanchion again, so analogize, just can all cleat stanchions 110 from down and on folded one by one, and whole process only needs nethermost group of key 133 of cleat stanchion 110 that needs are folded to push, cooperate again and constantly press down cross bar 150 and can the cleat stanchion 110 that needs fold have been folded, the cleat stanchion 110 that need fold folds automatically under the effect of pressing force and finishes, effectively saved manpower, and fold rear transverse rod and suffer cross bar and make volume little, be convenient to deposit and carry.

The expansion of the cleat stanchion 110 that the utility model novel telescopic ladder is related and the power thrusts that folds and position are well known to those of ordinary skill in the art, no longer are described in detail at this.

Above disclosed only is preferred embodiments of the present utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.

Claims

1. novel telescopic ladder, comprise some cleat stanchions, cross bar and connection locking mechanism, socket mutually between the described cleat stanchion, described cross bar is connected with the both sides cleat stanchion by connecting locking mechanism, fold or launch by described connection locking mechanism between the described cleat stanchion, it is characterized in that: described connection locking mechanism comprises adapter sleeve, securing rod, torsionspring and group key, described adapter sleeve is made up of the connector that is placed in the clamping ring on the described cleat stanchion and be connected with described cross bar, described group of key is articulated on the described connector, described torsionspring is articulated on the described group of key, and described torsionspring one end and described connector are conflicted, the other end and described group of key are conflicted, described securing rod one end engages with described group of key, and the other end is telescopic under the effect of described torsionspring to be passed the locking of described clamping ring and described cleat stanchion or conflict.

2. novel telescopic ladder as claimed in claim 1 is characterized in that: described torsionspring has mutual a pair of first leg and second leg at an angle, and described first leg is all conflicted with described connector, and described second leg and described group of key are conflicted.

3. novel telescopic ladder as claimed in claim 1 is characterized in that: the end that described securing rod passes described clamping ring has flange, described flange prevent described securing rod too much pass described clamping ring.

4. novel telescopic ladder as claimed in claim 1, it is characterized in that: also comprise locked mechanism, described locked mechanism is embedded in the described clamping ring, described locked mechanism comprises contact chip and chock, described contact chip one end passes described clamping ring, the other end and described chock are conflicted, and described chock is embedded in the described clamping ring.

5. novel telescopic ladder as claimed in claim 1, it is characterized in that: also comprise the plastic cement cushion collar, described plastic cement cushion collar lower end is evenly distributed with the buffering pin of outside protrusion, described plastic cement cushion collar is between upper and lower adjacent cleat stanchion, the described cleat stanchion lower end of going up is placed in the described plastic cement cushion collar, described buffering pin contacts with described descending stair column wall, and described plastic cement cushion collar lower end is provided with intilted inclined-plane.

6. novel telescopic ladder as claimed in claim 1, it is characterized in that: also comprise manual control mechanism, described manual control mechanism is located in the described cross bar middle part, described manual control mechanism comprises pair of links and a pair of handle, described connecting rod one end is connected with described securing rod, the other end and described handle clamping, and described handle stretches out described cross bar.

7. novel telescopic ladder as claimed in claim 1 is characterized in that: described clamping ring inboard is provided with some to co-axial grooves, and described cleat stanchion top is provided with the boss that mates mutually with described clamping ring inner groovy.

8. novel telescopic ladder as claimed in claim 1 is characterized in that: described cleat stanchion upper inside wall is coaxial evenly to be provided with some outstanding blocks, and described block is to being placed in up restriction of adjacent cleat stanchion in the described cleat stanchion.

9. novel telescopic ladder as claimed in claim 1 is characterized in that: also comprise the reinforcement cross bar, described reinforcement cross bar is connected between bottom the both sides cleat stanchion.

10. as claim 1 or 5 described novel telescopic ladders, it is characterized in that: described cleat stanchion and described cross bar are metal material or composite material, and described plastic cement cushion collar is a polymeric material.