CN86100405A - Improvement to folded ladder - Google Patents

Abstract

The present invention relates to improvement to the folded ladder of forming by two angle section merogenesis cleat stanchions staggered relatively, wherein vertical with ladder plane surface is loaded with two longitudinal ribs, be drilled with the boring that faces toward mutually on the rib, boring is used for holding the pivot pin that the connection step can fold step.3 important improvement are arranged: keep ladder to be fixed on the wall; Open the electric releasing device of ladder; The releasing device system of ladder is correctly placed on the different upright positions, can handle whole ladder with manual or electronic mode from these positions to make it to open.

Description

Improvement to folded ladder

The present invention relates to improvement to a kind of folding ladder, this ladder is by two staggered relatively forming of metal cleat stanchion with horn shape cross section, the surface of cleat stanchion is vertical with the ladder plane and have two ribs, have the hole that faces toward mutually on the rib, this hole is used for admitting undertakes the pivot pin that connects step, and its connected mode can make the ladder folding by cleat stanchion is put together.

In such ladder, there are four major issues to need to improve, but do not solve fully as yet so far, these 4 are:

1. to keep ladder on the wall;

2. be used for delivery system that ladder is opened;

3. on the different vertical height ladder delivery system is correctly located, opening of ladder can be controlled on these vertical heights;

In addition certain releasing device of utilization starts under the axle of other releasing device or the actionless situation of handle manually or power driven system come ladder and guide rail are disposed automatically.

Therefore, need to consider such fact: when placing the ladder of forming by the terraced box unit of determining length, again when the building facade is higher than the height of single terraced box unit, must one be that two or more a plurality of terraced box unit are placed in a ground, will be assembled the height of the building facade of this folding ladder so that it highly is equal to or higher than.

Terraced box unit like this should be done such inside and connect, so that only form complete integral body or folding ladder, and can do as a whole opening to such ladder from different height, for example facing to each passage that leads to ladder.Therefore importantly: the distance of the dismounting of each retaining element of movable cleat stanchion and movable cleat stanchion fixed distance cleat stanchion should be guaranteed on the upright position that all cleat stanchions are placed on the ladder.One of condition is: preferably the different continuous terraced box unit of forming ladder is harmonized in vertical plane and their adjustment is kept.

Therefore importantly: make the connector of adjustable fixed ladder satisfy such condition: consider following situation, can not look to the facade of building to constitute an intact vertical plane.In addition, cleat stanchion or any pulling force or the thrust that applies along horizontal or vertical direction of step are not allowed ladder is thrown off from the fixed connecting piece of keeping it.

For reaching the maximum assurance of different ladders being opened the safe operation of releasing device, needed another condition can obtain like this: promptly will correctly place on each position that is requiring when installing to ladder on the building.For this purpose, must on-the-spotly arrange all positions of preestablishing on the one hand, on these predeterminated positions on the fixedly cleat stanchion of ladder, place an axle and rare support of putting, and the position that all are preestablished also must be set on the other hand, and will be placed into the profile of tooth guide rail of same releasing device on these positions on the dismounting control press strip of movable cleat stanchion.

The present invention has overcome these inconvenience and has solved the above-mentioned each point that must solve, and it has been considered because the possibility that the ladder sections due to the variations in temperature expands, and does not cause some zone to be subjected to causing in some position the pulling force influence that the ladder distortion causes.The present invention also provides the possibility of opening ladder with electrical system control, and it realizes by means of the button that is contained in in the difference outlet of leading to ladder, and the present invention also further provides and opened the possibility that system combines with manual system electric.In case there is a releasing device to be out of order, then both can also can be with the electronic ladder of opening of the electric installation that provides for this purpose with another releasing device.

Another feature of this releasing device is: when a handle is operated, handle causes corresponding pinion rotation, the profile of tooth guide rail of mobile pinion, the profile of tooth guide rail has been a component part of the flat device of press strip effect, move a flat device, all fix another profile of tooth guide rail on each bottom surface on it; Be positioned over so flat device or each the profile of tooth guide rail on the press strip, its respective pinions is worked and do not cause about axle and handle and place that this means: the action of the arm of operation releasing device and the motion of other releasing device arm have nothing to do.

According to the present invention, in the emergent ladder of the folding that the perpendicular elements continuous by one or several formed, made improvement, wherein each element is made of two cleat stanchion and steps with angle section.Facing to placing, step is connected on the above-mentioned cleat stanchion inner surface of two cleat stanchions mutually.Inner surface has two ribs longitudinally respectively perpendicular to the cleat stanchion on ladder plane, rib is located to the edge of the wing of first cleat stanchion with towards the angle section of second cleat stanchion, each all faces toward a rib of another cleat stanchion such rib, and every certain distance the boring that faces toward mutually is set in a longitudinal direction, to accept to be used for connecting the pivot pin of step.It is characterized in that: on the one hand, fixing angle section cleat stanchion is one that is placed on the facade side, include externally and laterally be placed to the wing parallel in its each side with the building facade plane, and such wing, each side on this wing all has the device that has added flange, have a groove on these devices, the edge engagement of the horizontal wing of this groove and this class.Laterally the wing is shaped in following mode, go so that pierce in the curved larynx of groove on each device, curved larynx is to be fixed on along parallel cannelure on the position of a hope by one or several bolt, all provides such groove to each wing that is fixed on the U type device on the building facade; (above this section obscure-annotation of translation) cleat stanchion that stationary device is caught and is maintained fixed by grooving apparatus by its wing; And on the other hand, between it is perpendicular to the wing of building facade and adjacent rib, a groove with two capitate shapes being arranged in the above-mentioned this fixedly cleat stanchion, can pack in this groove in the press strip edge of the equal in length of a joint of length and ladder.Such press strip in each joint of ladder all attempts to be connected with next press strip, its mode will make when ladder is remained on folding with the use location and guarantee continuity on the whole ladder height in this device and be connected, by continuous boring, make and to fix so that for example on 30 cm distance, placing a releasing device the profile of tooth guide rail on the appointed positions.By continuous boring on the fixing horizontal wing of cleat stanchion same each position of determining for holding boring amount rail with decide into for fixed releasing device spool the needed boring of support.

In addition, can work steadily in order to ensure press strip, pinion and profile of tooth guide rail sequence, so that the installation of two cleat stanchions of ladder, dismounting and separately, the reinforcement support is provided for this reason, this reinforcement support is put on the central rib relative with the vertical flank of fixing cleat stanchion, and by screw or bolt, such reinforcement support can play the effect of trunnion bearing to the axle of releasing device, prevent the fixedly flank distortion of cleat stanchion, and therefore pinion and profile of tooth guide rail are meshed effectively.

Another recommendation form according to the embodiment of the invention, install in order to ensure helping, dismantle and separate the press strip of two cleat stanchions of ladder, pinion and profile of tooth guide rail series work, not to put in the lateral groove of central rib strengthening support, but can provide one to strengthen support, this support is not put in the side channel of central rib, but the curved larynx of only packing into, this curved larynx is similar to the curved larynx in each expander element, these expander elements have a groove, this groove is attached on the inward flange of flank of U type part, such reinforcement support has a hole, bearing is played to the axle of the pinion on the profile of tooth guide rail in this hole, and keeps locating by two grooves respectively establishing one in each side of this part.

In order to understand this invention better, and show its feature, will adopt directly perceived and unrestraint mode the present invention to be narrated with reference to following accompanying drawing:

Fig. 1 is the simplified cross-sectional view of the terraced box unit of folding ladder, and it has expressed expander element;

Fig. 1 a is the view of details included in the circumference that with dashed lines among Fig. 1 is indicated, and this details is designed according to the another kind of recommendation form of embodiment;

Fig. 1 b is the simplification phantom of same terraced box unit on the height level who strengthens part;

Fig. 1 c is the view of details included in the circumference that with dashed lines among Fig. 1 b is indicated, and this details is according to the another kind of recommendation form design of embodiment;

The scaled side view of the terraced box unit part that Fig. 2 is partly cut away;

The scaled lateral view of terraced box unit part that Fig. 3 is partly cut away;

Fig. 3 a is the view of included details in the circumference that with dashed lines among Fig. 3 is indicated according to the another kind of form of embodiment;

Fig. 4 is the lateral view of expander element;

Fig. 5 is the view that is contained in the attachment feature on the fixing cleat stanchion;

Fig. 6 is the view that is contained in the attachment feature on the cleat stanchion that is opened;

Fig. 7 is the simplification profile view of releasing device;

Fig. 8 is the part rear elevation of fastening devices;

Fig. 9 invents the view of two projects that provided for delivering this ladder;

Figure 10 invents total view that the part of each project that is provided is cut away for delivering this ladder;

Please refer to Fig. 1 and 1b now.1 represents the facade of building, 2 is U type parts, it is fixed by an expandable bolt 3, the back side of U type part has a confession to be fixed to the groove of regulating in the past on the wall (Fig. 8) at last, and respectively there are two cannelure 4(can be on each U-shaped wing) referring to Fig. 2-annotation of translation, two bolts 5 keep part 6 by these two grooves, the fixed angles tee section metal cleat stanchion 7 of part 6 supporting ladders, and because of allowing the latter vertically to slide such as reasons such as expansions, the fixed angles tee section metal cleat stanchion 7 of ladder comprises longitudinally and has the pivot pin (not shown) that hole 9 holds step on the rib 8,8.At U type part 2(Fig. 8) in groove be eccentric with respect to axle, this mode can guarantee maximum lateral displacement (X), this displacement energy provides good vertical adjustment to all expander elements 6, even the bolt on being fixed to building also can be harmonized owing to running into when iron staff one class article must laterally be removed.

Fig. 1 also shows the horn shape cross section cleat stanchion of opening 10, and 10 form terraced box unit with fixing cleat stanchion when closure.The cleat stanchion of opening 10 like this comprises the rib 8 relative thirty years of age of longitudinal rib 11,11 and fixing cleat stanchion 7 equally.Porose 12, the 12 pivot pin (not shown) that are used for holding step in such cleat stanchion of opening 10.In known mode, one in the rib 11 of the cleat stanchion of opening 10 has vertical leg 13 and 14, has hole 15 and be used for admitting guide rail pivot pin (not shown) in 13 and 14.The joint 16,16 that show ladder relative thirty years of age with such leg constituted the cleat stanchion on the opposite of this guide rail (not shown); Have hole 17 on 16 and be used for holding the pivot pin of guide rail (not shown).

Fig. 1 a shows the rib of making by another recommendation form of the embodiment of the invention 8.Rib 8 does not have groove 42 and 43.This last groove 43 is by groove 8 ' replacement, support 41 ' head 44 ' install to groove 8 ' in go, 41 ' be by with chisel the groove 8 of its both sides ' on the breach opened keep locating; This support have a hole 9 ', 9 ' axle 29 is played supporting role, axle 29 is by the pinions 31 of profile of tooth guide rail 32.With this support 41 ' by having a thick washer 41C, 41C to work to isolate part.Such isolation part 41C can prevent support 41 ' warpage.

Fig. 9 and Figure 10 show the figure of the system of opening, and are particularly opening handle 18 facing to being contained in of each exit position (for example window) on the differing heights level on the ladder.Hole 48 has been carried out, and they are to open one every 30 centimetres on the U type wing perpendicular to the fixedly cleat stanchion 7 of building facade.Such boring can be implemented in that locational location of the support 30 of axle 29 by be attached to the help of a drill ga(u)ge 49 in such boring 48 with bolt, and therefore realizes the location of other each parts of formation releasing device.

If continuously each joint of assembling ladder is from following arrangement: fixing cleat stanchion 7 being rigidly connected to building facade 1 by intermediate U type part 2, and the indirect connection of motionless (opening) cleat stanchion 10 is by intermediate step (not shown) and fixing cleat stanchion 7, the movable part that then must keep each section of ladder simultaneously and can be done ladder to discharge on the as a whole level at various height on corresponding retaining element equally.For this point, for installation and removal provide direct connection.Therefore, fixedly the inner surface of cleat stanchion 7 comprises a two cannelure 19,19 between the wing and adjacent rib 8 perpendicular to fixing cleat stanchion 7, and the flat part 20 as press strip slides in groove 19, and the height of so flat part equates with the height of a joint of ladder.Flat part 20 is if the words that have are by on the flat part 20 that is connected to upper and lower joint such as small pieces and two bolt (not shown).An attachment feature (Fig. 3 and Fig. 5) is attached to this flat part 20(Fig. 1) on, and this system is controlled by release arm 18 by flat part 20; The back side that attachment feature 21 includes U type part 22,22 turns to flat part 20, places axle 23,23 frame support brackets 24 by 22 it is faced down, and compress into this position by spring 25.That relative with this attachment feature 21 of ingredient in the vertical plane that constitutes fixing cleat stanchion 7 is part 26(Fig. 6), be furnished with a head 27 on 26, and 26 be fixed on the movable cleat stanchion 10, head 27 is filled in below the carriage 24 when the ladder closure.In the central rib 13 of the cleat stanchion 10 that such part 26 generally fixedly advances to open, the aft section 28 of this part vertically falls in following mode, makes head 27 be in about the center longitudinal axis of flat part 20.Therefore be readily appreciated that: when ladder was closed, in order to open it, head 27 should no longer be kept by carriage 24, and must rise ladder and rise flat part 20 thereupon; This point can be finished by reducing releasing device arm 18.In order to reach this point, such arm or handle 18(Fig. 1 b, 3,7.10) be contained on the end of axle 29, on the support 30 that 29 place on the flank that is fixed on cleat stanchion 7, also carry out located lateral with fixing by the groove 42 and 43 on the rib 8 by such cleat stanchion, carry out longitudinal register with fixing by bolt by the axle 29 that a reinforcement support 41 maintains on the other end.Control button 50 is fixed on the axle 29, and 50 pairs cause that the moving pinion pin 51 of little gear works, and it forces profile of tooth guide rail 32 to take the jail with dull and stereotyped 20 by two pins that make progress, and carriage 24 is in is on the attachment feature 21.Open in order to make ladder, one flip-arm or pushing arm 33 also are placed on this axle that is positioned at pinion 31 outsides longitudinally, and controlled by pin 51, when its end 34 of band angle further left flat part 20, it was by on the central rib 13 that is pressed in movable cleat stanchion 10.

Make as a whole all attachment feature 21 on the flat part 20 and can be raised come in order to ensure placing, therefore and can also rise next away from a dismounting part 26 that is fixed on the movable cleat stanchion 10 before the fixing cleat stanchion 7 at movable cleat stanchion 10 itself, on the flat part of flip-arm 33, make the groove 33a of band curvature, pin is put in this groove so that rotated the several years and cause that ladder launches before flip-arm 33 is pulled up on its whole height.Use same quadrat method, when operating the handle of releasing device, the latter causes the pinion rotation, and its traction profile of tooth bar rail 32 also makes its motion.This profile of tooth guide rail is fixed on the flat part 20 and uses as press strip.Place the profile of tooth guide rail 32 on this flat part or the press strip 20 at the bottom of each layer, all can find, however connecting axle 29 or handle rotation that it works and do not cause it corresponding pinion.This means: when a people operated the handle 18 of releasing device, the motion of other arm of its motion and other releasing device was irrelevant.

In addition, when the ladder opening operation is finished, when handle 18 is released, all form the attachment feature 21 of a composite entity and the starting point that flat part 20 is all got back to them, that is to say, move downward by a stiff spring (not shown), this spring is fixed in the fixedly bottom of cleat stanchion 7 on the one hand, is fixed on again on the press strip 20 on the other hand.

Be installed on the flat part 20 again not part 20 from fixedly cleat stanchion 7 rises on the one hand in order to be easy to a profile of tooth guide rail; On the other hand, can easily be positioned at it on the tram of flat part 20 again, so that the pinion of releasing device 31 correctly meshes so that the opening operation of ladder, so be drilled with diplopore on all positions on the whole length of flat part that can place releasing device.In order to accomplish this point, this profile of tooth guide rail 32 usefulness pin 32a pin is on flat part 20 before other part of releasing device is installed.In addition, when other part of releasing device was placed into the position, the profile of tooth guide rail can no longer pull out pin and just remove from flat part.

In order to ensure part 6 and fixing cleat stanchion 7(Fig. 1,3,4) between connection, the breach 35 in the part 6 comprises a circular groove 38 in the one side, will adorn rounded nose 40,40 corresponding with the small-sized horizontal wing 36 of fixing cleat stanchion 7 in shape in groove 38.Because these breach comprise groove 40a certainly, the remainder of side will have the shape of rounded nose 40.Same situation will be applicable to have with circular groove and be complementary on the respective side of the horizontal wing 36 of shape.By between the head 40 of the groove 38 of part 6 and the 40a and the wing 36 and groove 38, on respective dimension, reserving the gap, can be put into part 6 on the wing 36 at an easy rate, part 6 is drawn towards the wing 36 really at an angle, part 6 will be corrected so that fixed by bolt 5 subsequently then, in this way, fixedly the part 6 of cleat stanchion 7 and the wing 36 are not separated.

With reference to figure 1b, can see and strengthen support 41 that it is a wedge on the central rib 8 of fixing cleat stanchion 7.In order to make this point become possibility, such rib 8 comprises two blocking elements in the horizontal, one is 42, it is a straight-line groove, the end of vertical and close rib 8, another is double turn-on, one is parallel to and another is perpendicular to rib 8, this double turn-on has the edge and the breach 43 of disconnection, after inserting at an angle, strengthen support 41 and can wedge above-mentioned edge and breach, and, it is leaned against on the rib 8 then to pressing down it, and in addition, longitudinally be fixed on the rib 8 41 by the bolt (not shown).Such reinforcement support 41 more or less resembles the form of tuning fork, it comprises a flat head 44 and rounded nose 45 is arranged on another face at the one end on the one hand, its mode guarantees to place at an angle, and can in the groove 43 of rib 8, proofread and correct then, and on the other hand, at its back side, on its right side a flange 46 is arranged, it being positioned in the groove 42 itself.In addition, this that extends through rib 8 strengthened support 41 will make that it can be with the axle 29 of following mode facing to releasing device 18, make it to 29 effects of playing a bearing: on this end face porose 47.Meanwhile, this reinforcement support 41 will play the isolation part effect between pushing arm 33 and rib 8.In this way, strengthen support 41 axle 29 of releasing device correctly is engaged in the profile of tooth guide rail 32, and 32 be fixed on the press strip 20 and guarantee that the various parts of opening ladder can work steadily.

One will understand that on the one hand: on the level that is fixed on each part 2 on the wall 1, part 6 is housed all, and on the other hand, it is to assemble that the part as 6 is strengthened support on the level of each releasing device 18.

In addition, because part 6 and 41 are installed obliquely, make between each part 6 and the wing 36 and 41 and central rib 8 between locking separately do not realize, therefore not only must provide circular edge, and must be in one of each assembled part retention gap, utilize free space that an element is packed among another.By making the parallel so simple mode of part 6 can not reach such packing into, but in contrast, pack into obliquely, proofread and correct them with horizontal rotation then and ground interlocking of their covers with 41.This does not hinder part 6 and 41 to play them.

Therefore with reference to figure 4, can see: part 6 is each sections of complete whole segment length, all has vertical slots 35 on every section, and the little horizontal wing 36 parallel with the facade plane of fixing cleat stanchion 7 can slide in such groove.In addition, such part has two screw 51(not shown), they one under another so that inject bolt 5.

According to Fig. 1 a and 1c, in another recommendation form of embodiments of the invention, strengthen support 41 by support 41 ' replacement, and groove 42 has been cancelled, groove 43 is by groove 8 ' replacement, support 41 ' head 44 ' be contained in 8 ' in.Support 41 ' be level place groove 8 ', rotated up subsequently, and lean against groove 8 ' two breach digging out of each side help to keep going into the position.Just as has been described, support 41 ' in the hole 9 ' axle of releasing device 29 is played bearing.The advantage of this form of embodiment is that it can improve the engagement of the pinion 31 in the profile of tooth guide rail 32 significantly, and its way is to make that releasing device has better rigidity when the handle 18 of operating pinion is exerted pressure.

On the other hand, according to this another kind of form of embodiments of the invention, except the manual releasing form, the power driven system that discharges ladder also is designed, and it uses battery powered d.c. motor by continuous charging of contact connector control to open ladder.For this purpose, on cleat stanchion 7, opened groove 52 so that insert electric wire thus.

For fear of the supporting arm generation lateral displacement that places the balancing spring (not shown) in the step, thereby prevent that also spring from damaging, and opened two V-type grooves 53 on cleat stanchion 7.

The present invention is not limited only to the various forms of the above embodiments, improves not mean that the scope of the present invention of leaving in them.

Claims (9)

1, the emergency ladder made improved this ladder folding and become one or several vertical continuous section of ladder, wherein each element is made up of two angle section metal cleat stanchions, the inner surface of two cleat stanchions is mutually facing to placing, on above-mentioned cleat stanchion, be connected with step, two longitudinal ribs of cleat stanchion supporting that its inner surface is vertical with the ladder plane, rib is located towards the edge of the wing of first cleat stanchion with towards the angle of second cleat stanchion, each rib is facing to a rib of another cleat stanchion, and vertically have the hole that faces toward every certain interval along it, these holes are used for accepting to be used to connect the pivot pin of step, it is characterized in that: be placed in this fixed angles tee section metal cleat stanchion on the building facade side, on the one hand in each side, (obscure here-annotation of translation) includes a wing on the outside and each side, and this wing is parallel to the plane of facade, also be included in the wing that each side of cleat stanchion is curved, has a part with the breach of the end face interlock of such horizontal wing, it is characterized in that: the shape of so horizontal wing is chosen for and itself correctly can be placed the groove (38) on each part (6) to go, part (6) is fixed by locational one or several bolt of wishing on the length that is positioned at each parallel longitudinal direction groove (4), and each wing that is fixed on the U type part on the facade all is furnished with this groove; Retaining element comes closed by its part (35) of the wing by gap and is maintained fixed cleat stanchion (7); On the other hand, above-mentioned this cleat stanchion (7) inherent it a double flute (19) arranged between vertical tail, on the facade and adjacent rib, double flute (19) has the hammer shape, the edge of flat part (20) that length equals the length of a joint ladder can slide in groove (19), above-mentioned this flat part (20) in each section of ladder is made into one by one connection continuously, its connected mode can be guaranteed keeping ladder to be in the mode of folding and open position, on the height of whole ladder, have continuity and be connected, can on the position of determining (for example every 30 meters), fix a profile of tooth guide rail (32) and put a releasing device (18) here by continuous punching, also determine such position by continuous boring on the horizontal wing of fixing cleat stanchion (7) equally, by the meaning of continuous boring be: these borings are used for accepting a drill ga(u)ge to realize the boring for the support of the axle usefulness of fixed bearing releasing device.

2, according to the described improvement of claim 1 to emergent folding ladder, it is characterized in that: install in order to ensure supplying, dismounting and the flat part (20) used of two cleat stanchions of ladder separately, pinion (31) and this covering device of profile of tooth guide rail (32) can play a role steadily, provide one to strengthen support (41), it by put into by in the relative central rib of the vertical transverse wing of the fixedly cleat stanchion of screw or bolt, (41) will be as the axle rotation of a bearing matter releasing device, prevent the fixedly distortion of the horizontal wing of cleat stanchion, and therefore can make pinion (31) and profile of tooth guide rail (32) can keep good engagement.

3, according to the described improvement of claim 1 to emergent folding ladder, it is characterized in that: by the fixing U type part (2) of an extendible bolt (3), at its back side, before finally being fixed on the wall, have regulating tank, and such regulating tank arranged all on its each wing, also have two cannelures (4), be used for keeping two bolts (5) of part (6) by groove (4) in each position, the fixed angles tee section metal cleat stanchion (7) of ladder is kept with part (6), and owing to can vertically sliding such as the reason that expands, such cleat stanchion has longitudinal rib (8), in (8), have the hole (9) that holds the step pivot pin, groove on U type part (2) is in eccentric position with respect to axle, so that can carry out maximum displacement, thereby can guarantee even the bolt on being fixed on building also can carry out good vertical adjustment to all expander elements (6) must laterally remove the time.

4, according to any described improvement in claim 1 and 2 to emergent folding ladder, it is characterized in that: fixedly the inner surface of cleat stanchion (7) comprising: perpendicular to the wing on the fixing surface of cleat stanchion (7) and a two cannelure (19) between the adjacent rib (8), the flat part (20) that uses as press strip is contained in (19) and slides; A flat part that highly equals the height of one section ladder, with connected flat part (20), for example adopt if any and resemble tablet and two screws and link on the flat part (20) of each section of ladder up and down, and on above-mentioned so flat part (20), be fixed with an attachment feature (21), and this system is released device arm (18) and controls; Attachment feature (21) is made up of U type part (22), its back is towards flat part (20), the axle (23) that is loaded with carriage (24) by (22) is positioned, (24) be diverted this arm and by spring (25) compress into this position in addition with this vertical plane and fixing cleat stanchion (7) form the attachment device (21) of a complete integral body relative be a part (26), head (27) is housed (26) and is fixed on the movable cleat stanchion (10), head (27) when ladder is closed, be in carriage (24) below, such part (26) is fixed in the central rib (13) of cleat stanchion (10) of expansion, what the aft section of this part was vertical recalls, so that head (27) is in about the longitudinal axis of flat part (20).

5, according to any described improvement to emergent folding ladder among the claim 2-4, it is characterized in that: release arm (18) is contained on the end of axle (29), and (29) place on the support (30), and (30) are fixed on again on the horizontal wing of cleat stanchion (7); Axle (29) maintains on its other end by such cleat stanchion and with strengthening support (41), (41) by breach (42) and (43) be positioned and crosswise fixed on rib (8), with a bolt it is longitudinally located again and fix, and on axle (29), be fixed with control button (50), (50) pin (51) on the pinion (31) is worked, make gear rotate, make profile of tooth guide rail (32) snap on the flat board (20) thus by two pins that make progress (32a), and therefore carriage (24) is fixed on the attachment feature (21), in order to force ladder to launch, a turning device (33) or pushing arm are placed on the axle (29) that is positioned at pinion (31) outside equally, and are controlled by pin (51).Thus when its end (34) with angle from flat part (20) when leaving, this arm is pressed in the external surface of movable cleat stanchion (10), and because all attachment feature (21) that are positioned on the flat part (20) constitute a complete integral body, so the part (26) that is fixed on the movable cleat stanchion (10) can be raised, and make movable cleat stanchion (10) get off from split before fixedly cleat stanchion (7) is removed at flip-arm (33), on the plate part of flip-arm (33), have crooked groove (33a), (33a) allow to be contained in pin (51) in this groove at pulling flip-arm (33) with make and rotate the several years before launching on the whole height of ladder at it.

6, according to the described improvement of claim 1-4 to emergent folding ladder, it is characterized in that: rib (8) has a crooked part that constitutes groove (8 '), the head (44 ') of strengthening support (41 ') is contained in this groove, have hole (9 ') on (44 '), strengthen support (41 ') and keep the location by isolating part (41c) at the breach of each side of the latter and the cylinder that has a bore hole, axle (29) is by this bore hole, and in the hole (9 ') that (29) top loading marks, isolate the effect that part (41c) avoids strengthening support (41 ') warpage in addition.

7, according to the described improvement of claim 1-6 to emergent folding ladder, it is characterized in that: when handle (18) when being operated, it makes corresponding pinion (31) rotation, thereby cause the motion of corresponding profile of tooth guide rail (32), (32) intactly be connected with the flat part (20) that plays the press strip effect, on each bottom surface of flat part (20), be fixed with another profile of tooth guide rail, place so flat part (20) or each the profile of tooth guide rail (32) on the press strip that their pinions (31) are separately worked, but do not cause corresponding axle (29) and handle (18) rotation, so the result is like this, be because the motion of other arm of the operation of the arm of releasing device and releasing device is irrelevant.

8, according to the described improvement of claim 1-7 to emergent folding ladder, it is characterized in that: groove (52) is installed in that cleat stanchion (7) is gone up and inserts so that the different elements that is used for making the electrical system that ladder launches is carried out wire connecting, as two V-type grooves (53) of on this same cleat stanchion (7), opening, (53) effect is that the supporting arm of avoiding being contained in the balancing spring on the inboard step takes place laterally to move, thereby and prevents that spring from damaging.

9, according to the described improvement of claim 1-8 to emergent folding ladder, it is characterized in that: one or several electrically contacts motor of being powered by battery or other suitable power supply of frequent charging of maker control, this motor is operated flat part (20) or press strip on its whole height, therefore and control the dolly of pinion and other hand release, perhaps, hand release can be placed on the ladder cleat stanchion (7), though these the device in axle (29) and lever (18) when not being activated situation also be like this.

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