CN107250479A

CN107250479A - Folding ladder

Info

Publication number: CN107250479A
Application number: CN201580065774.5A
Authority: CN
Inventors: M·I·基弗; A·A·考德威尔; N·L·施吕特
Original assignee: Core Distribution Inc
Current assignee: Core Distribution Inc
Priority date: 2014-12-02
Filing date: 2015-12-02
Publication date: 2017-10-13
Anticipated expiration: 2035-12-02
Also published as: EP4273362A2; CN107250479B; EP3227517A1; MX2017007137A; EP3227517B1; CN112459698B; WO2016090041A1; CA2968554C; EP4273362A3; CN112459698A; ES2963810T3; CA3130716A1; CA3130716C; CA2968554A1; MX2022009716A; EP3227517C0

Abstract

This disclosure relates to a kind of folding ladder, it has the first ladder portion and the second ladder portion, and second ladder portion is attached to first ladder portion in hinged way by a pair of linkages.Each linkage is adapted to locking first and second ladder portion with so that first ladder portion and second ladder portion form angle therebetween.The linkage has shift mechanism and the coupled ladder angle selector manually selected to allow the angle between first and second described ladder portion, and first and second ladder portion to be locked in the stop pin of Angle Position.

Description

Folding ladder

Background technology

Ladder generally comprises the step between the terraced frame for being supported in and being formed by multiple posts.In some cases, ladder can be Telescopic ladder, and it is expansible so that the post separates the extension for ladder, or contraction together for ladder each other The retraction of son.The mechanism of these ladders often comprising ladder collapses can be allowed for storing and deploying during use.

The content of the invention

Certain embodiments of the present invention includes a kind of folding ladder, and it includes the first ladder portion and the second ladder portion Point, second ladder portion is attached to the first ladder portion around hinge axes in hinged way by a pair of linkages Point.First and second ladder portions described in each linkage lockable with cause first ladder portion and it is described second ladder Subdivision forms angle therebetween.Each linkage has shift mechanism, and it includes the shift mode defined by multiple slits, Each slit corresponds to Angle Position of first ladder portion relative to the second ladder portion.Shift mechanism includes selector pin, its It can be shifted in the shift mode, and receive second ladder portion being locked in relative to the described first ladder by slit The Angle Position of subdivision.

In certain embodiments, linkage include stop pin, the stop pin can along its center axis radially away from Moved with towards hinge axes.Stop pin can be radially orientated hinge axes and be biased by the spring and can be rotated around its center axis. Linkage includes multiple recesses, and each recess is radially-inwardly guided from the end of hinge member towards hinge axes.It is described many Individual recess can be angularly spaced around hinge axes, wherein around the hinge axes of each recess Angle Position correspond to it is described Predetermined angular between first and second ladder portion.In these embodiments, each recess has correspondence ladder angle opening, The opening has opening shape.The opening shape can permit when stop pin that around its center axis to rotate to stop pin transversal Stop pin is inserted through the opening shape when orientation in face is generally matched with the rotation of the opening shape.The opening shape Shape can work as stop pin and not be matched with the opening shape generally around the orientation that its center axis rotates to stop pin cross section Rotation when stop stop pin be inserted through the opening shape.

Some embodiments include a kind of method of folded ladder.Methods described may include following steps：Folding ladder is provided Son；Selector pin is set to move away from the first slit to discharge the first and second ladder portions from the first Angle Position；Make selector Pin is shifted in shift mode and close to the second slit；In hinged way enclose one of first and second ladder portions Around hinge axis rotates to the second Angle Position；And selector is locked be fixed in the second slit and accordingly fasten stop pin So that the first and second ladder portions are locked in into the second Angle Position in recess.

Certain embodiments of the present invention includes a kind of Telescopic ladder, and it includes the first terraced frame, the second terraced frame, each has Multiple posts, the multiple post be placed in nested arrangement for flexible axis of the pattern along the multiple post in extension bit Put moving to axial between retracted position.The first post close to floor surface has a flange, the flange with it is described The axis coaxle of multiple posts is positioned in the hollow body of first post.The ladder is included in the first terraced frame and the second terraced frame Between multiple steps for extending.Each step is connected to the post of the first terraced frame and the post of the second terraced frame.Close to described telescopic First stabilizer bag of the floor surface that ladder is positioned at is connected to the first and second posts.

In certain embodiments, the Telescopic ladder includes the first stabilizer for being connected to the first stabilizer bag.The One stabilizer can be moved between extended position and retracted position, wherein, in extended position, the first stabilizer is in the extension The hollow body portion of the first stabilizer bag is extended upward in position in the side generally normal with the axis of the multiple post Lease making crosses the first terraced frame.First stabilizer is retracted in retracted position in the hollow body part of the first stabilizer bag.The One stabilizer includes the hollow body being slidably engaged with the inner surface of the first stabilizer bag, and is adapted to protrude past boundary Due to the aperture on the first stabilizer bag so that the first stabilizer to be locked in the locking press button in its extended position.

In certain embodiments, the locking press button and aperture in the extended position of the first stabilizer with the multiple post Axis coaxle.In these embodiments, because the first post is towards the Telescopic moving of the first stabilizer bag, the flange can Abut against the locking press button in the aperture for protruding past the first stabilizer bag.Locking is pressed in the adjoining of flange against locking press button Button is forced away from the aperture, and so that the first stabilizer unlocks from its extended position and enters retracted position.

In certain embodiments, the ladder is folding telescopic ladder, including the first ladder portion, the second ladder portion Point, second ladder portion is hingedly connected to the first ladder portion with so that the first and second ladder portions can be surrounded Hinge axes rotate.At least one of first and second ladder portions can have step, and the step includes a pair of stabilizers, It is adapted to extend upwardly past first ladder portion in the side generally normal with the axis of the multiple post Each of the described first and second terraced frames and be retracted in the hollow body part of first stabilizer bag.

Brief description of the drawings

The following drawings illustrates the particular embodiment of the present invention and therefore not limited the scope of the invention.Accompanying drawing is not necessarily pressed Ratio is drawn (except being far from it statement), and it is set with it is described in detail below in explaination be used in combination.Retouched below in conjunction with accompanying drawing Embodiments of the invention are stated, wherein similar label represents similar components.

Figure 1A is the perspective view of the folding ladder for being locked in the first Angle Position according to embodiment；

Figure 1B is locked out in the perspective view of Figure 1A of the second Angle Position folding ladder；

The perspective view of Fig. 2A is that what is shown in contraction state be locked in Figure 1A of the third angle position folding ladder；

Fig. 2 B are the perspective views of the Fig. 2A shown in extension state folding ladder；

Fig. 2 C are the close-up perspective views of Fig. 2 B part " 2C "；

Fig. 2 D are the left side views of the folding ladder of Figure 1A part " 2D ", and which show only the first and second ladder portions The step divided；

Fig. 2 E are the cross-sectional plan views of a part for the ladder according to embodiment, and it illustrates the thin of connector assembly Section；

Fig. 3 is the perspective view of the linkage according to embodiment；

Fig. 4 A are the side views of Fig. 3 linkage, wherein the selection collar removes to show linkage from view Some details；

Fig. 4 B are the side perspective views of the Fig. 3 shown in released state linkage, wherein the selection collar is moved from view Except for showing some details of linkage；

Fig. 4 C are the side views of the linkage shown in Fig. 4 B, and wherein second hinge part and the selection collar is moved from view Except for showing some details of linkage；

Fig. 5 is the cross-sectional view of the linkage along the line 5-5 interceptions shown in Fig. 3；

Fig. 6 is the detailed view of Fig. 5 linkage, and wherein some components of first axle part remove to show from view Go out some details of linkage；

Fig. 7 is the detailed perspective view according to the stop pin of embodiment, lockplate, selector pin and bias spring；

Fig. 8 A are the cross-sectional side views of Fig. 5 linkage, and some of which feature removes to show hinge from view Some details of chain mechanism；

Fig. 8 B are Fig. 8 A part 8B close-up illustrations；

Fig. 9 A are the perspective views of the folding ladder for being locked in the first Angle Position according to embodiment；

Fig. 9 B are the perspective views of the folding ladder of Fig. 9 A for being locked in the second Angle Position in contraction state；

Fig. 9 C are the perspective views of Fig. 9 B shown in extension state folding ladder；

Fig. 9 D are locked out in the perspective view of Fig. 9 A of the third angle position folding ladder；

Figure 10 A are the part 10A of the ladder shown in Fig. 9 A close-up perspective views；

Figure 10 B are the perspective views of the ladder for the 10A for showing the stabilizer in extended position；

Figure 10 C are the saturating of the ladder for the 10A for showing the stabilizer in extended position and the stabilizer in retracted position View；

Figure 10 D are the perspective views of the part 10D shown in Figure 10 A；

Figure 11 A are the decomposition diagrams of the ladder portion illustrated in Figure 10 A, wherein the first and second posts from view hide with Some interior details are shown；

Figure 11 B are the cross sectional front elevations of the ladder portion shown in Figure 10 B, and wherein cross section is along plane 3B-3B Interception；

Figure 12 is the perspective view for showing the first stabilizer bag and the first and second air dampers according to embodiment, Wherein stabilizer is shown in contraction state；

Figure 13 is the perspective view of Figure 12 stabilizer for showing to show in extension state；

Figure 14 is the perspective view of the stabilizer according to embodiment；

Figure 15 A are the right side views of Figure 14 stabilizer, and its middle cover is removed to illustrate interior details；

Figure 15 B are the cross section right side views of the part along the plane 15B-15B Figure 10 B intercepted；

Figure 16 is the decomposition diagram of the stabilizer together with Figure 14 shown in connector；

Figure 17 is the feature decomposition view of the part 17 shown in Figure 10 B；

Figure 18 is the front view of the air damper according to embodiment；And

Figure 19 is the perspective view of Figure 18 air damper.

Embodiment

It is described in detail below to be exemplary in nature, and be not intended in any way limit the scope of the present invention, be applicable Property or configuration.But, description below provides some the practice explanations for the exemplary embodiment for being used for implementing the present invention.Construction, material The example of material, size and manufacturing process is provided for selected element, and all other element is using the general of the field of the invention Example known to logical technical staff.Those skilled in the art will recognize that, many described examples, which have, a variety of suitably to be replaced For scheme.

Figure 1A is the front perspective view of the ladder 10 according to some embodiments.Figure 1B, 2A and 2B are according to some embodiments Deploy and be locked in the front perspective view of various angles in its folding position that ladder 10 is illustrated from Fig. 1.In fig. ib, ladder 10 has been Through the angle 60 for deploying and being locked in about 30 degree from its folding position in Figure 1A.In Figures 2 A and 2 B, ladder 10 has been locked In the angle 60 of about 180 degree.In fig. 2, the upper part 12 of ladder 10 is in contraction/retracted mode, and in fig. 2b, The upper part 12 of ladder 10 is in extension state.The ladder 10 illustrated in these views can have the He of the first ladder portion 14 Second ladder portion 16, its each self-contained two relative terraced frame：The terraced frame 20 of left side ladder frame 18 and right side, each terraced frame is by multiple Post 22 is formed.In accordance with the embodiments illustrated, each relative post of each terraced frame includes the step 24 extended therebetween, wherein often One step 24 is coupled to relative post on either end by connector assembly 28.In certain embodiments, post 22 is by aluminium Formed.Other materials are expected and within the scope of the invention.Post 22 is illustrated as with circular cross section (when along post 22 When the longitudinal axis 40 is watched), post 22 can have rectangular cross section, for example, transfer the 2012/0267197A1 of present assignee Those rectangular cross sections illustrated in number U.S. Publication case, the side that the disclosure of the U.S. Publication case is quoted in full hereby Formula is incorporated to.Other cross sections (for example, square, oval or polygonal shapes shape) are also expected.As will be described herein, at some In embodiment, post 22 can be substantially a hollow, to allow connector assembly 28 that step 24 is fastened in the terraced frame in right side Post on each of 20 and the terraced frame 18 in left side.

Fig. 2 C illustrate the close-up perspective view of the step 24 of the first ladder portion 14.Fig. 2 D, which are illustrated, to be shown to work as ladder 10 such as The side view of the step 24 of the ladder portion 16 of step 24 and second of first ladder portion 14 when being folded shown in Figure 14.At some In embodiment, each step 24 includes planar first surface 30 and the planar second surface 32 relative with planar first surface 30. The first surface 30 of each step 24 of first ladder portion 14 defines flat container support surface 34.Second ladder portion 16 it is flat Define flat container support surface 34 at least one of first and second surfaces.Referring back to Fig. 2A to 2B, when ladder 10 deploys to supply In use, the first surface 30 of each step 24 of the second ladder portion 16 has the feature of flat container support surface 34, such as Fig. 2 C Shown in view.However, when ladder 10 is folded for storing or being deployed into the angle in addition to about 180 degree (for example, institute in such as Figure 1B Show) when, therefore the first surface 30 of each step 24 of the second ladder portion 16 upwardly, and may not be used when ladder 10 is folded Flat container support surface 34 can be defined on the downside of step 24 when storing or being deployed into the angle in addition to 180 degree.First ladder The flat container support surface 34 of each step 24 of the ladder portion 16 of subdivision 14 and second, which can have, is defined in pedal therein 36, to provide friction between contact surface (for example, sole of the footwear of user) of the flat container support surface 34 with user.As herein It will describe, step can be substantially a hollow, to allow connector assembly 28 that step 24 is fastened in the terraced frame 20 in right side With the post on each of the terraced frame 18 in left side.Step can be formed by aluminium extrusion, but other materials and manufacturer can also be used Formula.

Although Fig. 2 C and 2D illustrate the step 24 with general rectangular cross section, other cross section shapes of step 24 Shape is also expected.For example, step 24 can have parallelogram shaped cross section, for example, transfer present assignee Those parallelogram shaped cross sections illustrated in 2012/0267197A1 U.S. Publication cases, the disclosure of the U.S. Publication case Content is incorporated in entirety by reference hereby.Although Fig. 2 C and 2D of diagram show general rectangular step 24, first At least a portion of the first surface 30 of the ladder portion 16 of ladder portion 14 and second is relative to the formation angle 60 of horizontal plane 42. In the illustrated embodiment, when the angled portion of first surface 30 is relative to the formation angle, θ of horizontal plane 42.Angle, θ can Between about 5 degree and 45 degree (for example, between 5 degree and 20 degree).These embodiments allow to work as ladder 10 towards vertical wall rotation (example Such as, with an angle abutment walls) when ladder 10 first surface 30 at least angled portion 38 to be horizontal so that normally make With period, at least a portion of vertical wall can be level of approximation.However, depending on ladder 10 against vertical wall angle, into Angle part 38 can exceed that or not up to level.

Referring back to Fig. 2 C, each step 24 is connected to the post in multiple posts 22 by connector assembly 28.At some In the case of, multiple posts 22 are placed in nested arrangement for moving to axial with pattern of stretching so that ladder 10 can edge The longitudinal axis 40 for post 22 extends or shunk.Such Telescopic ladder and various types of connector assemblies the 8,387th, It is described in detail in 753B2 United States Patent (USP)s and US6,883,645B2 United States Patent (USP)s, two above United States Patent (USP) transfers this The assignee of application, and the disclosure of each of which is incorporated in entirety by reference hereby.In these Telescopic ladders In, connector assembly 28 includes release button 43, and it can be slided along the preceding surface 44 of step 24 with unblock or selectivity lock Moving to axial between two neighbouring posts 22 in fixed multiple posts 22, the preceding surface 44 of step 24 is essentially perpendicular to and many The orthogonal plane 46 of the longitudinal axis 40 of individual post 22.

Fig. 2 E illustrate the one of the ladder intercepted according to some embodiments along the plane of the top surface parallel to step Partial top cross-sectional view, it is illustrated that the details of connector assembly 28.Fig. 2 E sectional view is represented with connector assembly All steps of 28 ladder.Connector assembly includes the collar portion for surrounding post 22 and being contacted with the periphery surface of outside column 28a, and the stepped portion 28b being inserted into step 24.In embodiment shown in Fig. 2 E, connector assembly 28 is included The bolt lock mechanism in stepped portion 28b is contained in, it includes two release button 43a and 43b and pin 45.Release button 43a It can be slided along the preceding surface 44 of step, and release button 43b can be slided along the rear surface 47 of step 24.In Fig. 2 E implementation In example, pin 45 is placed in extended position, and wherein pin 45 is extended in the aperture 29 being defined on connector assembly 28 and prolonged Reach in the opening 41 on post 22.In some embodiments of the invention, pin 45 is biased (for example, by spring 49) and prolonged with taking Stretch position.When that is the case, button 43a or button 43b can be made to slide and selectively push away on direction 51 by application Enter pin 45 to take retracted position.In accordance with the embodiments illustrated, pin 45 include one or more through holes 53, each button 43a, 43b handle 55 can be inserted into (for example, by frictional fit) through the through hole for the pattern that cooperates by button 43a, 43b coupling Close pin 45.Such as from Fig. 2 E it is clear that can be by as shown on direction 51 along the sliding button of respective surfaces 44 or 47 43a or button 43b and retract or stretching pin 45.The slip movement of either button will also be such that another button is slided on direction 51, Because there is cooperation via pin 45 therebetween to connect.In some cases, the first ladder portion 14 and the second ladder portion 16 is every One step 24 can have the button that can be slided on preceding surface 44 and the button that can be slided on rear surface 47, as shown. Alternatively, any one ladder portion (the first ladder portion 14 or the second ladder portion 16) can be on preceding surface 44 and rear surface 47 All there is button.

Referring back to Figure 1A, folding ladder 10 includes a pair of linkages, and it is by the first ladder portion 14 with the side of being hinged Formula is connected to the second ladder portion 16.Fig. 3 illustrates the perspective view of linkage 48, and Fig. 4 A to 4B are illustrated according to the present invention Some embodiments linkage 48 various detailed views.Such as Figure 1A to 2B and seen in fig. 3, linkage 48 can be surrounded Hinge axes 50 fold the first ladder portion 14 and the second ladder portion 16.The He of 48 the first ladder portion of lockable of linkage 14 Second ladder portion 16 is to cause the first ladder portion 14 and the second ladder portion 16 to form angle 60 therebetween.In such as Figure 1B most Good finding, angle 60 can be defined as the longitudinal axis of the post 22 of the ladder portion 16 of the longitudinal axis 40 and second of the post 22 of the first ladder portion 14 Angle between 40.In figure ia, the first ladder portion 14 and the second ladder portion 16 form about 0 degree of angle 60.In Figure 1B In, the first ladder portion 14 and the second ladder portion 16 form about 30 degree of angle 60.In Fig. 2A to 2B, the first ladder portion 14 and second ladder portion 16 form the angle 60 of about 180 degree.

Referring now to Fig. 4 A to 4C, each linkage 48 includes may be connected to the first axle portion of the first ladder portion 14 Part 52 and the second hinge part 54 that may be connected to the second ladder portion 16.As seen in this fig. 1b, first axle part 52 can The longitudinal axis 40 with the post 22 of the first ladder portion 14 is coaxially connected, and the post that second hinge part 54 can be with the second ladder portion 16 22 longitudinal axis 40 is coaxially connected.For example, as seen in figure 1, the first axle part 52 of left side and right side hinge mechanism is all It is connected to the most upper prop 56 (left side and right side post 56) of the first ladder portion 14, and the second hinge of left side and right side hinge mechanism Part 54 is all connected to the most upper prop 58 (left side and right side post 58) of the second ladder portion 16.Left side and right side shown in Figure 1A On linkage can be substantially similar.Alternatively, the linkage 48 on right side can be the mirror of the linkage 48 on left side Picture.First axle part 52 and second hinge part 54 can rotate around hinge axes 50 relative to each other.Due to first axle Part 52 and second hinge part 54 are rigidly coupled to the first ladder portion 14 and the second ladder portion 16, therefore first axle portion The rotation of part 52 and second hinge part 54 makes the first ladder portion 14 and the second ladder portion 16 rotate relative to each other, and instead It is as the same.The rotation of first ladder portion 14 and the second ladder portion 16 is to surround hinge axes 50 so that the first ladder portion 14 and second ladder portion 16 and first axle part 52 and second hinge part 54 form angle 60 therebetween when rotated. At least a portion at the edge 62 of second hinge part 54 can be semicircular.In addition, the edge 64 of first axle part 52 At least a portion can be semicircular.The other shapes of the part at edge 62,64 are also it is contemplated that such as half elliptic or other Bowed shape.

With continued reference to Fig. 3 and Fig. 4 A to 4C, linkage 48 includes shift mechanism 70.Shift mechanism 70 may act as selector And allow user to select the angle 60 between the first ladder portion 14 and the second ladder portion 16.Shift mechanism 70 include by The shift mode 72 that multiple slits 74,76,78 that periphery is positioned on first axle part 52 are defined.Each slit 74,76, 78 correspond to Angle Position of first ladder portion 14 relative to the second ladder portion 16, and adjacent slots 74,76,78 are with along the The distance 80 of the periphery definition of one hinge member 52 is separated.Such as optimal finding in Fig. 4 A, selector pin 82 can be in shift mode 72 Middle displacement, and receive to lock the second ladder portion 16 by slit 74,76,78 at the first end 84 of slit 74,76,78 In the Angle Position relative to the first ladder portion 14.In figures 4 a and 4b in shown diagram embodiment, shift mechanism includes three Individual slit 74,76,78, it corresponds to three Angle Positions that the first ladder portion 14 and the second ladder portion 16 can be positioned at.Such as Shown in Fig. 4 C, selector pin 82 can discharge from first end 84 and move closer to second end 86 so that the first ladder portion 14 Discharged with the second ladder portion 16 from its latched position.Once release, the first ladder portion 14 and the second ladder portion 16 just may be used Rotate to change angle 60 therebetween relative to each other.

As seen in Fig. 4 A to 4C, linkage 48 includes one or more safety indicators.Safety indicator can be regarding Indicator is felt, for example mark or the band with color coding, to indicate whether the first ladder portion 14 and the second ladder portion 16 are locked Due in Angle Position.Safety indicator can be " clicker " or tactile indicators heard, to provide a user the sense of hearing or tactile Feed back to indicate that the first ladder portion 14 and the second ladder portion 16 are securely locked in Angle Position.The reality illustrated in Figure 4 A Apply in example, when the first ladder portion 14 and the second ladder portion 16 are locked in Angle Position, safety indicator provides First look Indicate 90 (for example, other marks in the band of green or area, or the first area 96).The embodiment illustrated in figs. 4 b and 4 c In, when the first ladder portion 14 and the second ladder portion 16 are unlocked, safety indicator provide and second visually indicate 92 (for example, Red band or area, or the other marks being placed in the second area 98).In addition, ladder 10 can be comprising other marks (for example, word Female numerical character, image, symbol etc.) to indicate predetermined angle that the first ladder portion 14 and the second ladder portion 16 can be positioned at Degree.For example, in the embodiment illustrated in figure 4b, three marks 94 are that the symbol of the Angle Position of ladder 10 represents that it refers to Show that the first ladder portion 14 and the second ladder portion 16 can be locked in about 0 degree, about 30 degree and about 180 degree.These marks 94 also may be used Close to the positioning of each slit 74,76,78, to provide a user on when selector pin 82 is close to each slit 74,76,78 What kind of the first ladder portion 14 and the second ladder portion 16 will rotate when (for example, at or near its second end 86) is positioned The information of the anglec of rotation 60.

Referring now to Fig. 5, in certain embodiments, linkage 48 includes lockplate 100, and it is positioned at second hinge portion It is concentric with the center 110 and hinge axes 50 that cause lockplate 100 in part 54.Such as from Fig. 5 cross-sectional view finding, lockplate 100 can be bolted to second hinge part 54 so that hinge axes 50 are overlapped with the center 110 of lockplate 100.Alternatively, lock Plate 100 may be connected to second hinge part 54 so that inner surface (for example, flank) formation of itself and second hinge part 54 rubs Coordinate so that the center 110 of lockplate 100 and hinge axes 50 are concentric.When coupling in this way, lockplate 100 is regularly It is positioned in second hinge part 54, and does not move or do not rotate relative to second hinge part 54.

With continued reference to Fig. 5, lockplate 100 includes multiple recesses 112,114,116.Each recess is outside lockplate 100 Edge 118 extends radially-inwardly and towards the center 110 of lockplate 100.Due to the center 110 of lockplate 100 and hinge axes 50 concentric locating, therefore recess 112,114,116 is therefore each since one end of second hinge part 54 is radially inwardly toward hinge Chain axis 50 is guided.Recess 112,114,116 is angularly spaced around hinge axes 50 so that each recess surrounds hinge axis The predetermined angular 60 that the Angle Position of line 50 corresponds between the first ladder portion 14 and the second ladder portion 16.In this position, choosing Device pin 84 is selected to be received in slit 74,76,78.For example, in the exemplary embodiment, each recess can be with another recess point From an angle 119, its angle 60 corresponded between the first ladder portion 14 and the second ladder portion 16.In such cases, The number of recess 112,114,116 corresponds to the number for the position that the first ladder portion 14 and the second ladder portion 16 can be locked in Mesh.In the illustrated embodiment, lockplate 100 includes three recesses 112,114,116：First recess 112, the second recess 114 With the 3rd recess 116.Therefore first ladder portion 14 and the second ladder portion 16 can be locked in three Angle Positions, corresponding to recess 112nd, the angle 119 between 114, each of 116.In operation, the first ladder portion 14 and the second ladder portion 16 can Rotation correspond to two recesses (for example, 112 and 114, or 112 and 116) between angle 119 angle 60, and be locked in it In.As described above, the angle 60 between the first ladder portion 14 and the second ladder portion 16 can about 0 degree with about 180 degree it Between.For example, it is illustrated that the lockplate 100 in embodiment includes three recesses 112,114,116, and the He of the first ladder portion 14 Second ladder portion 16 can be locked in the first Angle Position, second jiao of position at about 0 degree, about 30 degree and about respectively at the angle of 180 degree Put and the third angle position.Therefore, in Figure 5 in shown diagram embodiment, between the first recess 112 and the second recess 114 Angle 119 is that angle 119 between about 30 degree, and the first recess 112 and the 3rd recess 116 is about 180 degree.Corresponding to the first ladder The extra lockable of the ladder portion 16 of subdivision 14 and second is configured (for example, in about 45 degree, about 60 degree, about 120 degree or other volumes Outer angle) extra recess be also expected.

Referring now to Fig. 6, in certain embodiments, folding ladder 10 includes the stop pin for being connected to selector pin 82 120.Stop pin 120 has the elongate body that the central axis 122 around stop pin 120 is disposed.As shown in Fig. 6, stop pin 120 moved up in the side along its center axis 122 turnover recess (112,114,116) and can by lockplate 100 recess (112,114,116) receive.For example, stop pin 120 is received to lock the first and second angle parts by the first recess 112 In first angle 60 (for example, 0 degree), it is received in the second recess 114 and sentences the first and second angle parts are locked in second angle 60 (for example, 30 degree), and be received in the 3rd recess 116 sentence by the first and second angle parts be locked in third angle 60 (for example, 180 degree).As described above, lockplate 100 can have any number of recess 112,114,116, and therefore the first ladder portion 14 and second ladder portion 16 can be locked in the Angle Position of corresponding number.Referring back to Fig. 5, stop pin 120 is received in second In recess 114.Accordingly, selector pin 82 is received in the second slit 76.In the embodiment illustrated in Figure 5, the first ladder Angle between part and the second ladder portion is about 30 degree.Other Angle Positions are expected.For example, when the first ladder portion Point and the second ladder portion when being locked in the about angle 60 of zero degree, stop pin 120 is fully received in the first recess 112, and choosing Device pin 82 is selected to be fully received in slit 74.When the first ladder portion and the second ladder portion are locked in the angle 60 of about 180 degree When, stop pin 120 is fully received in the 3rd recess 116, and selector pin 82 is fully received in slit 78.

As shown in figs 6 and 7, stop pin 120 has rectangular cross section, and it has along the edge 121 of length and along width Edge 123, but any non-circular cross sections are also expected.Stop pin 120 may be mounted to first axle part 52, for edge Its center axis 122 to move radially away and towards hinge axes 50.As it will be described below, stop pin 120 is by biasing bullet Spring 124 is towards the radially spring biasing of hinge axes 50.Stop pin 120 can rotate around its center axis 122 so that stop pin The shape alignment of 120 shape of cross section and the recess (112,114,116) on lockplate 100.

With continued reference to the embodiment illustrated in Fig. 6 and 7, stop pin 120 has the aperture for wherein receiving selector pin 82 126.Therefore stop pin 120 and selector pin 82 couple that they are moved with cooperation mode as will be described below.In figure In the embodiment shown, stop pin 120 and selector pin 82 couple central axis 122 to cause stop pin 120 relative to selection The axis 128 of device pin 82 is laterally positioned in angle 60 (for example, 90 degree).Its between the axis of stop pin 120 and selector pin 82 Its angle is also expected.Referring back to Fig. 5 and with continued reference to Fig. 6, selector pin 82 and stop pin 120 can be coupled to each other, make Stop pin 120 is moved to the recessed of stop pin 120 when proper selector pin 82 is moved in the slit 74,76,78 of shift mode 72 In portion (112,114,116).In addition, the coupling between selector pin 82 and stop pin 120 may be such that when selector pin 82 is moved Stop pin 120 moves away from the recess (112,114,116) of lockplate 100 during slit 74,76,78 of remote shift mode 72. Although Fig. 5 and 6 illustrates stop pin 120 and is in the position that it is received by the recess (112,114,116) of lockplate 100, Fig. 7 illustrates stop pin 120 and is in the position of its recess for retracting away from lockplate 100.As seen in Figure 7, stop pin 120 Can be by bias spring 124 towards the radially spring biasing of hinge axes 50.When it is fully retracted the recess away from lockplate 100 When, stop pin 120 can retract away from abutting against holder during recess (112,114,116) of lockplate 100 in stop pin 120 130.As described previously, the first ladder portion 14 and the second ladder portion 16 can rotate around hinge axes 50 relative to each other. The rotation of first ladder portion 14 and the second ladder portion 16 relative to each other can make stop pin 120 position (example close to recess Such as, at ladder angle opening 132).Once the angle 60 between the first ladder portion 14 and the second ladder portion 16 is adjusted For the angle 119 appointed between the two in the recess (112,114,116) corresponding to lockplate 100, stop pin 120 is just brought to Close to recess (112,114,116) place, and extended to recessed due to the spring action from the spring being contained in holder 130 In portion.

As described previously, the engagement between stop pin 120 and selector pin 82 allows stop pin 120 to be fully received into recess In (for example, second recess 114 shown in Fig. 5), the first ladder portion 14 and the second ladder portion 16 are locked in angle position In putting, and it is fully retracted to discharge the first ladder portion 14 and the second ladder portion from Angle Position from recess (112,114,116) 16.When stop pin 120 is fully received in recess, the integration length of recess is accounted for by least first end 134 of stop pin 120 According to as best seen from figures 5 and 6.In this position, selector pin 82 is received in slit 74,76,78 (for example, as shown in Figure 5 Second slit 76) in so that selector pin 82 is held in the first end 84 of slit 74,76,78.In complete receiving positions In, the first ladder portion 14 and the second ladder portion 16 is locked relative to each other and angle 60 therebetween is fixed.Work as locking Pin 120 from recess (for example, second recess 114 as shown in Figure 7) discharge completely when, the second end 136 of stop pin 120 is supported Laid by holder 130.In fully released position, the first end 134 of stop pin 120 is almost fully retracted from recess.Correspondence Ground, selector pin 82 is moved to the second end 86 of slit 74,76,78 (for example, optimal seen second slit 76 in Fig. 5). In fully released position, the first ladder portion 14 and the angle 60 rotatable and therebetween of the second ladder portion 16 can change. Change before the angle 60 between the first ladder portion 14 and the second ladder portion 16, selector pin 82 is approached in another slit 74th, 76,78 (for example, first slits 74 or the 3rd slit 78 shown in Fig. 5) are positioned.When the first ladder portion 14 and the second ladder When subdivision 16 rotates to required Angle Position, stop pin 120 is by another recess (for example, the first recess 112 or the 3rd recess 116) receive, and selector pin 82 is by the first end of another slit 74,76,78 (for example, the first slit or the 3rd slit 78) 84 receive.

Referring now to Fig. 8 A and 8B, stop pin 120 can be formed and be oriented so that when the first ladder portion 14 and second Stop pin 120 abuts against second hinge part when ladder portion 16 is at an angle of with any angle 60 in addition to multiple predetermined angulars 54 edge 62.Such as from Fig. 8 B close-up illustration finding, each recess, which has, to be defined in the edge 62 of second hinge part 54 Corresponding ladder angle opening 132.Each ladder angle opening 132 has opening shape.The opening shape can be permitted when lock Rationed marketing 120 is generally matched with the opening shape around the orientation that its center axis 122 rotates to the cross section of stop pin 120 Stop pin 120 is inserted through the opening shape during rotation (for example, as shown in Figures 5 and 6).As seen in Fig. 8 A and 8B, ladder The opening shape of subangle opening 132 can work as stop pin 120 and rotate to the cross section of stop pin 120 around its center axis 122 Stop that stop pin 120 is inserted through the opening shape when orientation is not matched with the rotation of opening shape generally.Such as Fig. 8 A and Shown in 8B, the ladder angle opening 132 for not matching along the edge 121 of length and along the edge 123 of width recess 112 is opened Mouth-shaped, so as to prevent stop pin 120 from entering recess 112.In the illustrated embodiment, each recess along RADIAL 138 to Hinge axes 50 are inside radially orientated to dispose.When lockplate 100 and during 50 concentric locating of hinge axes, the center 110 of lockplate with The joining of RADIAL 138 is overlapped.Recess 112,114,116 is rectangle, and ladder angle opening shape allows to be oriented to So that the central axis 122 of stop pin 120 stop pin with rectangular cross section into a line with the RADIAL 138 of recess 120 pass through, and stop pin 120 rotates so that the cross section of stop pin 120 around its center axis 122 and ladder angle is opened The opening shape alignment of mouth 132.

Referring back to Fig. 5 and 6, stop pin 120 can be by selecting the collar 142 to be rotated around its center axis 122.As above Described, each recess has ladder angle opening 132, and it allows to lock when stop pin 120 rotates around its center axis 122 Pin 120 is by the opening to match opening shape.In these cases, ladder angle selector permits the first ladder portion 14 and the second required angle 60 between ladder portion 16 manually select.In certain embodiments, ladder angle selector is The selection collar 142 being slidably engaged with first axle part 52.Select the collar 142 and the positive engagement of selector pin 82.Selector Pin 82 again with the positive engagement of stop pin 120 so that allow select the collar 142 manipulate stop pin 120 movement and rotation.Citing comes Say as shown in Figure 5, the selection collar 142 can be along set ring axis 144 along the direction illustrated by arrow " d " against first axle Part 52 is slided, and the direction is substantially parallel to the central axis 122 of set ring axis 144 and stop pin 120 and defined.In choosing Select the collar 142 along direction " d " slide when, selector pin 82 together with selection the collar 142 move and the direction on direction " d " The second end 86 of second slit 76 removes the second slit 76 (illustrated best in Fig. 4 C).Also, referring back to Fig. 5, stop pin 120 It is mobile along the direction " d " parallel to its center axis 122, and moved radially outward from the second recess 114.When selector pin 82 When being shelved against the second end 86 of the second slit 76, the second end 136 of stop pin 120 abuts against holder 130 (in Fig. 7 Optimal finding).

Referring back to Fig. 4 A to 4C and 5, when the selection collar 142 moves so that selector pin 82 is moved on direction " d " To the second slit 76 second end 86 when, the first ladder portion 14 and the second ladder portion 16 is unlocked schedules in Angle Position.Cause This, as described above, the lower section of the selection collar 142 is previously hidden in when the first ladder portion 14 and the locking of the second ladder portion 16 The second area 98 be changed into visible to user, to indicate that the first ladder portion 14 and the second ladder portion 16 are not securely locked.One Angle 60 between denier the first ladder portion 14 and the second ladder portion 16 is adjusted to required angle, stop pin 120 just due to It is by mobile towards the spring biasing of hinge axes 50 along direction " f ".Direction " d " can be opposite with direction " f ".Selector pin 82 Moved along direction " f " and close to the first end 84 of the second slit 76.During moving herein, due to the selection collar 142, lock Rigidity between rationed marketing 120 and selector pin 82 is coupled, and the selection collar 142 is mobile also along direction " f ".Stop pin 120 is received In recess (112,114 or 116) and selector pin 82 is received in slit 74,76,78, so as to prevent first axle part 52 Hinge axes are surrounded between second hinge part 54 and the ladder portion 16 of connected first ladder portion 14 and second 50 any relative rotary motion.When selecting the collar 142 mobile along direction " f ", when the first ladder portion 14 and the second ladder The first area 96 that the lower section of the selection collar 142 had previously been hidden in when subdivision 16 is unlocked is changed into visible to user, to indicate the first ladder The ladder portion 16 of subdivision 14 and second is securely locked.

With continued reference to Fig. 4 A to 4C and Fig. 5, the selection collar 142 can be relative to first axle part 52 around set ring axis 144 rotations.When selecting the collar 142 to rotate (for example, the set ring axis 144 illustrated in Fig. 5 along direction " e "), selection Device pin 82 is moved along the shift mode 72 being defined on first axle part 52.For example, the selection collar 142 is removable straight Untill selection pin movement is adjacent to the 3rd slit 78.In the selection collar 142 relative to first axle part 52 around set annulate shaft When line 144 rotates, the rigid coupled transfer between selector pin 82 and stop pin 120 selects the rotary motion of the collar 142, and makes Stop pin 120 rotates around its center axis 122.When selection the collar 142 be fully rotatable with by selector pin 82 take to close to At 3rd slit 78 when (for example, at second end 86 of the 3rd slit 78), stop pin 120 revolves around its center axis 122 Turn to cause its cross section to be matched with the opening shape of the 3rd recess 116.This manually handle can allow user from the first ladder portion Points 14 and second multiple predetermined angulars between ladder portion 16 in manually select required angle 60.

In use, user can make ladder 10 from its Angle Position during storing (for example, the first ladder portion 14 and Two ladder portions 16 form about 0 degree of angle 60, as shown in Figure 1A) expansion.Referring to Fig. 4 A to 4C, user can be along direction " d " displacement selection the collar 142, and on direction " e " rotation selection the collar 142 until selection pin joint be bordering on another slit 74,76, Untill 78 second end 86.The rotary motion of the selection collar 142 makes stop pin 120 be rotated around its center axis 122 so that The cross section of stop pin 120 is matched with the ladder angle opening 132 of recess (112,114,116).User can then make the first ladder The ladder portion 16 of subdivision 14 and second rotates to required angle 60 (selected from the first ladder portion 14 and the second ladder relative to each other The predetermined angular that subdivision 16 can be locked in).Once reach needed for angle 60, stop pin 120 be just automatically pushed to recess (112, 114 or 116) in because stop pin 120 along direction " f " by towards the spring biasing of hinge axes 50.Selector pin 82 and selection The collar 142 is mobile also along direction " f ".In Angle Position needed for first ladder portion 14 and the second ladder portion 16 are locked in, and Selector pin 82 is held in the first end 84 corresponding to the slit 74,76,78 of required Angle Position.The He of first ladder portion 14 Second ladder portion 16 can not be further rotated until by selecting collar 142 and the above-mentioned step of repetition along direction " d " is mobile It is rapid and make stop pin 120 untill recess (112, the 114 or 116) release.

The embodiment of folding ladder described herein can allow user's folded ladder be used for store to minimize the face of occupying Product, and spread out and securely locked in multiple angles.The embodiment of folding ladder described herein is used Come safe and easy.

Fig. 9 A are the front perspective views of the ladder 210 according to some embodiments.Fig. 9 B to 9D are the ladders according to some embodiments Deploy and be locked in the front perspective view of various angles in its folding position that son 210 is illustrated from Fig. 9 A.In Fig. 9 B and 9C, ladder 210 deploy and are locked in the angle of about 180 degree from its folding position in Fig. 9 A.In Fig. 9 D, ladder 210 has been locked In about 30 degree of angle.In figures 9 b and 9, the upper part 222 of ladder 210 is in contraction state, and in Fig. 9 C, ladder 210 Upper part 222 be in extension state in.

Referring now to Fig. 9 A, Telescopic ladder 210 includes the first terraced terraced frame 216 of frame 214 and second (for example, scheming in Fig. 9 A The left terraced frame and right terraced frame shown).First and second terraced frames each have multiple posts 218, its be placed in nested arrangement for With axis 220 of the pattern along multiple posts 218 moving to axial between extended position and retracted position of stretching.Citing comes Say, in figure 9 a, the upper part 222 of ladder 210 is illustrated at retracted position, its axis of center pillar 218 along post 218 220 are nested in interior each other with flexible pattern, and in Fig. 9 D, the upper part 222 of ladder 210 is illustrated at extended position.

As seen in Fig. 9 A, ladder 210 is included in the multiple steps extended between the first terraced terraced frame 216 of frame 214 and second 224.Each step 224 may be connected to the post 218 of the terraced frame 216 of post 218 and second of the first terraced frame 214.As illustrated in figure 9 a, often One step 224 can be connected to post 218 by connector assembly 226.With continued reference to Fig. 9 A, in some cases, each step 224 include planar first surface 228 and the planar second surface 230 relative with planar first surface 228.First ladder portion The first surface 228 of 250 each step 224 defines flat container support surface 232.Flat first table of second ladder portion 254 Flat container support surface 232 is defined at least one of face 228 and planar second surface 230.Referring to Fig. 9 B and 9C, when ladder 210 Expansion is supplied in use, the first surface 228 of each step 224 of the second ladder portion 254 has flat container support surface.However, (for example, as shown in Fig. 9 A or 9D), second when ladder 210 is folded for storing or being deployed into the angle in addition to about 180 degree Therefore the first surface 228 of each step 224 of ladder portion 254 upwardly, and may not be used to store when step 224 is folded Or flat container support surface 232 can be defined on the downside of step 224 when being deployed into the angle in addition to 180 degree.First ladder portion Points 250 and second the flat container support surface 232 of each step 224 of ladder portion 254 can have and be defined in pedal therein 234, to provide friction between contact surface (for example, sole of the footwear of user) of the flat board container support surface with user.As herein It will describe, step 224 can be substantially a hollow, to allow connector assembly 226 that step 224 is fastened in right side ladder Post 218 on each of terraced frame of frame and left side.Step 224 can be formed by aluminium extrusion, but can also be used other materials and Manufacture.

Although Fig. 9 A to 9D illustrate the step 224 with general rectangular cross section, other cross sections of step 224 Shape is also expected.For example, step 224 can have parallelogram shaped cross section, for example, transfer assigning for the application Those parallelogram shaped cross sections illustrated in the 2012/0267197A1 U.S. Publication cases of people, the U.S. Publication case Disclosure is incorporated in entirety by reference hereby.Although Fig. 9 A to 9D of diagram show general rectangular step 224, Such as optimal finding in Figure 10 D, at least a portion of the first surface 228 of the first ladder portion 250 and the second ladder portion 254 238 can form angle, θ relative to horizontal plane 242.In the illustrated embodiment, when the angled portion 238 of first surface 228 During formation angle (not shown) relative to horizontal plane.Angled portion 238 can be formed relative to horizontal plane 242 about 5 degree with The angle of (for example, between 5 degree and 20 degree) between 45 degree.These embodiments allow to work as ladder 210 towards vertical wall rotation (example Such as, with an angle abutment walls) when step 224 first surface 228 at least angled portion 238 to be horizontal so that just During use often, at least a portion 238 of step 224 can be level of approximation.However, depending on ladder 210 against vertical wall Angle, angled portion 238 can exceed that or not up to level.

In certain embodiments, post 218 is made of aluminum.Other materials are expected and within the scope of the invention.Post 218 It is illustrated as with circular cross section (when the viewing of axis 220 along post 218).However, post 218 can have rectangular cross section, Those rectangular cross sections for example in the 2012/0267197A1 U.S. Publication cases for transferring present assignee illustrated, The disclosure of the U.S. Publication case is incorporated in entirety by reference hereby.Other cross sections are (for example, square, avette Or polygonal shape) it is also expected.Post 218 can be to be substantially a hollow with from another post 218 of received thereover.In addition, step 224 can be substantially a hollow so that a pair of breech lock sub-assemblies (not shown) can be contained in hollow step 224.

As described above, step 224 is connected to post 218 by multiple connector assemblies 226.Connector assembly 226 Can have be contained in the breech lock sub-assembly in the hollow space of each step 224 with unlock or selective lock adjacent to post 218 it Between move to axial.Such connector assembly 226 is in 8,387,753B2 United States Patent (USP)s and US 6,883,645 Described in number United States Patent (USP), two above United States Patent (USP) transfers present assignee, and the disclosure of each of which It is incorporated in entirety by reference hereby.Each breech lock sub-assembly has release button 246, and it manually can activate to unlock two Selective lock between individual neighbouring post 218 is moved to axial.In figure 9 a in shown embodiment, the release button Can along step 224 the slid inward of preceding surface 248 (for example, the thumb for passing through user), to unlock its corresponding breech lock group Component.Therefore, when the release button on the right side and left side of step 224 is all activated, permit neighbouring post 218 and move axially. Gravity can cause these posts 218 and its retracted downward of step 224 to take the contraction flow region similar to the ladder 210 shown in Fig. 9 A The position of step 224 shown in point.

In some cases, ladder 210 may include to be coupled to mutual first ladder portion 250 and second to be hinged pattern Ladder portion 254.For example, ladder 210 is folding so that the first ladder portion 250 and the second ladder portion 254 exist First angle 258 is formed therebetween.First angle 258 can be equal to about zero degree and about between 180 degree.In figure 9 a, first angle 258 It is about zero degree.In Fig. 9 B and 9C, first angle 258 is about 180 degree.In Fig. 9 D, first angle 258 is about 30 degree.First Each of ladder portion 254 of ladder portion 250 and second can have the first terraced terraced frame 216 of frame 214 and second, and it has many Individual post 218 and the multiple steps 224 extended between post 218.First ladder portion 250 and the second ladder portion 254 can lead to Cross linkage as known in the art and be locked in various Angle Positions.Exemplary hinge mechanism 260 is entitled《Folding ladder (Foldable ladder)》The 14/557th, No. 944 Co-pending US application described in and illustrate, the U. S. application turn Present assignee is given, is submitted on December 2nd, 2014, the disclosure of which is incorporated in entirety by reference hereby.

Referring now to Figure 10 A and 10B, the first terraced frame 214 includes the first post 264, and the second terraced frame 216 includes the second post 268.First and second posts 218 each have hollow body.First and second posts 218 may be connected to the first stabilizer bag 270. First stabilizer bag 270 and the first and second posts 218 approach the floor surface being positioned at during use in ladder 210 272.First stabilizer bag 270 and the first and second posts 218 can be as noted above by a pair of connectors sub-assemblies 226 Coupling.Alternatively, the first and second posts 218 can be fixedly connected to the first stabilizer bag 270 by connector 274.Connector 274 can have the connector opening 276 for being used for receiving the first stabilizer bag 270 (for example, illustrated best in Figure 16).Connector 274 receive the first and second posts 218 in its inner surface 278 in addition.The inner surface of first and second posts 218 and connector 274 278 form frictional fit.

Referring back to Figure 10 A and 10B, ladder 210 can include the first stabilizer for being connected to the first stabilizer bag 270 280 and second stabilizer 282.First stabilizer 280 and the second stabilizer 282 can be between each comfortable extended position and retracted positions It is mobile.First stabilizer 280 and the second stabilizer 282 can be substantially similar, but dextral stabilizer 282 can be left stabilizer The mirror image (axis 220 for surrounding post 218) of device 280.First stabilizer 280 and the second stabilizer 282 can be relative to the first stabilizations Device shell 270 is slidably moved into.In some cases, the first stabilizer 280 and the second stabilizer 282 can independently extend.Lift For example, the first stabilizer 280 may extend away while the second stabilizer 282 shrinks, and vice versa, as shown in Figure 10 C. As seen in Figure 10 B and 10C, the first stabilizer 280 and the second stabilizer 282 can be retracted to the first stabilizer in retracted position In the hollow body part 286 of shell 270.In extended position, the first stabilizer 280 and the second stabilizer 282 with it is multiple The hollow body part 286 that the generally normal side of the axis 220 of post 218 extends upward the first stabilizer bag 270 passes through One of first and second terraced frames.

Referring now to Figure 11 A to 11B and 12, the first stabilizer bag 270 is with coaxial with the axis 220 of multiple posts 218 The aperture 290 defined.As shown in Figure 13, each of the first stabilizer 280 and the second stabilizer 282 have locking press button 294, it can be protruded past in extended position is defined in the aperture 290 on the first stabilizer bag 270 to lock stabilizer 280、282.Locking press button 294 can work as the first stabilizer 280 and the second stabilizer 282 shrinks and abutted against outside the first stabilizer The position being depressed is generally in during the inner surface 296 of shell 270, and when the first stabilizer 280 and the second stabilizer 282 are in The center line 310 for the first stabilizer bag 270 that can be protruded past close to locking press button when in retracted position.When the first stabilization When the stabilizer 282 of device 280 and second pulled into extended position, locking press button keeps being depressed and abutting against the first stabilizer The inner surface 296 of shell 270.After aperture 290 is run into, locking press button protrudes past aperture and so as to lock the first stabilizer 280 and second stabilizer 282, and prevent them to be slidably moved into relative to the first stabilizer bag 270.When locking press button is protruded During by aperture 290, stabilizer 280,282 is locked in extended position by locking press button.These configurations can be used to by making ladder 210 center of gravity falls in the footprint area of ladder 210 and improved the stability of ladder 210.

Referring back to Figure 11 A to 11B, the first and second posts 218 each have flange 320, its axis with multiple posts 218 220 are coaxially located in the hollow body of the first and second posts 218.Figure 12 illustrates the first and second posts 218 (in Figure 12 not Diagram) flange close-up perspective view.As seen in Figure 11 A to 11B and 12, the flange 320 of the first and second posts 218 will can be locked Determine button 294 to depress away from aperture 290, so that the first stabilizer 280 and the second stabilizer 282 are discharged from its latched position, Therefore the first stabilizer 280 and the second stabilizer 282 are generally moved into the hollow body portion of the first stabilizer bag 270 Divide in 286.Flange can be positioned and is oriented in the first and second posts 218 so that every in the post 268 of proper first post 264 and second When post (for example, post 370 or post 380 shown in Figure 10 A) above one is nested in wherein, flange is in the first stabilizer of direction Promoted on the direction of shell 270 (for example, the distance " a " shown in Figure 19 B is to apart from " b ").Referring to Figure 11 A to 11B, by In the first post 264 towards the Telescopic moving of the first stabilizer bag 270, flange 320, which is abutted against, protrudes past the first stabilization The locking press button 294 in the aperture 290 of device shell 270, locking press button 294 is urged away from aperture 290, so that the first stabilizer 280 from the unblock of its extended position and being moved into retracted position.

Figure 14 is the perspective view of stabilizer 280,282 according to an embodiment of the invention.Figure 15 A are Figure 14 stabilizers 280th, 282 side view for removing end cap 330.As seen in Figure 14 and 15A, stabilizer 280,282 has substantially a hollow Main part, it has the length of about half " L1 " of the length " L2 " equal to the first stabilizer bag 270.Implement more than for example The first stabilizer 280 and the second stabilizer 282 shown in example can all have length L1, and the first stabilizer bag 270 can have There is length L2, so as to allow the first stabilizer 280 and the second stabilizer 282 to be abutted against each other in contraction.Stabilizer 280, 282 length can be measured from the first end 332 of stabilizer 280,282 to second end 334, and can not include any other volume The end cap 330 of the stabilizer 280,282 of enclosing cover.Equally, the length of the first stabilizer bag 270 can be the first stabilizer bag The end-to-end length of 270 main part.There is stabilizer 280,282 parallelogram shaped cross section to promote and the first stabilizer The sliding engagement of shell 270 (also with parallelogram shaped cross section, as shown in Figure 15 B).Referring back to Figure 14 and 15A, surely It is flat to determine the first surface 340 of device 280,282, and stabilizer 280,282 second surface 342 have one or Multiple recessed tracks 344.First surface 340 and second surface 342 are substantially parallel and relative to each other, and relative to horizontal plane 242 form angle " A ".When being positioned in the first stabilizer bag 270, the formation top surface of first surface 340, second surface 342 form lower surface 212.Stabilizer 280,282 also has the 3rd of the parallelogram shape for forming stabilizer 280,282 The surface 348 of surface 346 and the 4th.As described above, the other shapes of stabilizer 280,282 are also it is contemplated that it corresponds to the The shape (for example, rectangle) of one stabilizer bag 270.Referring to Figure 15 A and 15B, connection member 350 connects stabilizer 280,282 It is connected to the hollow body part 286 of the first stabilizer bag 270.For example, connection member 350 is square head bolt or screw, It is held in the recessed portion of the track of stabilizer 280,282 and formed frictional fit.One of connection member 350 or Multiple ends can be shelved against the inner surface 296 of the first stabilizer bag 270, and promote stabilizer 280,282 relative to first The slip movement of stabilizer bag 270.It is as previously mentioned, locking press button 294 extends past the first surface of stabilizer 280,282 340 (for example, extending illustrated best in aperture 290, Figure 16).Locking press button 294 can be biased by the spring by fixture 360 with Outside the aperture 352 for being projected into stabilizer 280,282, and therefore it is projected into outside the aperture 290 of the first stabilizer bag 270.Fixture 360 end 364 is received (for example, via slit, not shown) by the second surface 342 of stabilizer 280,282, and fixture 360 Slit 366 of the opposing end portions 362 on the first surface 340 of stabilizer 280,282 receive.Stabilizer 280,282 can also have There is end cap 330, it has the big cross section of the cross-sectional area of the hollow body part 286 than the first stabilizer bag 270.End cap Therefore 330 be not retracted in the first stabilizer bag 270 when stabilizer 280,282 shrinks.These embodiments promote manually Stabilizer 280,282 is accessed so that it extends from its retracted position.In addition to end cap 330, stabilizer 280,282 can also have Extra lid 368, it positions close to the center line 310 of the first stabilizer bag 270 and is positioned at the first stabilizer bag 270 Hollow body part 286 in.

It is as previously mentioned, and referring now to Figure 17, because the nesting in multiple posts of post 218 to the first and second 218 is stretched Formula moves (not shown in Figure 17), and the locking press button of stabilizer 280,282 can be by the flange that is positioned in the first and second posts 218 Actuating.Figure 17 illustrates the 3rd post 370 for being positioned at the top of the first post 264.Equally, the 4th post 380 can be positioned at the second post 268 Top (optimal finding in Figure 10 A).Referring back to Figure 17, the 3rd post 370 can be nested in the first post 264 and along multiple posts 218 axis 220 extends from first post.In some cases, each post can include air damper 200, its with it is described The axis 220 of post coaxially positions to limit moving to axial for multiple posts 218.In the illustrated embodiment, air damper The bottom peripheral edge 210 of 200 the 3rd posts 370 of capping passes through the air stream of the 3rd post 370 to limit.Exemplary air damper 200 are transferring described in the 2012/0267197A1 U.S. Publication cases of present assignee, the U.S. Publication case Disclosure be incorporated in entirety by reference hereby.As shown, flange 320 can be from being positioned at the first of the first terraced frame 214 The lower surface 412 of the first air damper 400 in post 264 extends.As seen in Figure 17, when locking press button 294 is in extension When the aperture 290 of the first stabilizer bag 270 is protruded past in position, the first air damper 400 and the first stabilizer 280 Locking press button 294 is coaxial.

Referring now to Figure 18 and 19, air damper 400 can each have the tab 414 being defined on its periphery surface, To promote to be inserted into the 3rd post 370 and prevent air damper 400 from the removal of the 3rd post 370.Tab 414 have promote with The taper preceding limb 416 of the engagement of the corresponding opening 418 of 3rd post 370, and prevent taper tab 414 from the 3rd post 370 Removal upright tail edge 420.Air damper 400 is coupled to the 3rd post 370 so as to obtain the tab of air damper 400 Protrude past the corresponding opening (optimal finding in Figure 19 A) of the 3rd post 370.Air damper 400 can be oriented so that opening Close to the bottom peripheral edge of the 3rd post 370.Air damper 400 is coupled to the 3rd post 370 so that the direction of the 3rd post 370 The nesting movement of first post 264 moves the aperture 290 of flange 320 towards the first stabilizer bag 270 of air damper 400 It is dynamic.When extra post 218 declines from above towards the first post 264, air damper 400 moves steady even closer to first Device shell 270 is determined, untill flange 320 abuts against and protrudes past the locking press button 294 in aperture 290.When the 3rd post 370 is complete When being nested in entirely in the first post 264, locking press button 294 then can be forced away from hole by the flange 320 of the first air damper 200 Mouthfuls 290 and shrink the first stabilizer 280.Air damper 400 can also have the recessed portion being located on its periphery surface 410 422.Recessed portion 422 can receive stop pin 430 (as shown in Figure 17), its lock first and the 3rd post 218 to prevent therebetween Move to axial.

Although the half (for example, first ladder portion 250) relative to folding ladder 210 describes implementation above Example, but the stabilizer 280,282 of the second ladder portion 254 is substantially similar to those stabilizers of the first ladder portion 250.Lift For example, the second ladder portion 254 may include the second stabilizer bag 440 with a pair of stabilizers 280,282, the stabilization Device extended upwardly past in the side generally normal with the axis 220 of multiple posts 218 second ladder portion 254 the first terraced frame and Each of second terraced frame, and be retracted in the hollow space of the second stabilizer bag 440.When the He of the first ladder portion 250 The angle that second ladder portion 254 is formed between e.g., from about zero degree and about 60 degree is (for example, 0 degree as shown in Fig. 9 A and such as figure 30 degree illustrated in 9D) when, the second stabilizer bag 440 is approached in floor surface 272, and when the He of the first ladder portion 250 When the formation of second ladder portion 254 is more than 90 degree angle (for example, 180 degree as shown in Fig. 9 B and 9C), the second stabilizer Shell 440 is away from floor surface 72.When multiple posts 218 are nested in interior each other with flexible pattern, the second ladder portion 254 it is steady Determine device 280,282 to be collapsible in the hollow space of the second stabilizer bag 440, so that ladder 210 is retracted in retracted position (for example, as seen in Fig. 9 A and 9B), and wherein when multiple posts 218 are with flexible pattern extension, the part of the second ladder 210 it is steady Determine device 280,282 and can be extended out the second stabilizer bag 440 (for example, as seen in Fig. 9 C and 9D).

In use, when the post 218 of the first ladder portion 250 and the second ladder portion 254 extends, flange 320 is moved Second stabilizer bag 440 of the first stabilizer bag 270 and the second ladder portion 254 away from the first ladder portion 250 Aperture 290.The stabilizer 280,282 of first ladder portion 250 and the second ladder portion 254 is each extended over out outside the first stabilizer The stabilizer bag 440 of shell 270 and second, be until the axis 220 of locking press button and post 218 protrudes past aperture in a line Only.First ladder portion 250 and the second ladder portion 254 can be locked in required Angle Position.During storing, ladder 210 can Fold and stabilizer 280,282 is collapsible.In order that stabilizer 280,282 shrinks, the first ladder portion 250 and the second ladder portion Divide 254 can be unlocked first from required Angle Position.The post of each of first ladder portion 250 and the second ladder portion 254 218 until the 3rd post 370 can be nested in the inside of the first post 264 completely and the 4th post 380 is nested in the second post completely with after-contraction Untill 268 inside.When the third and fourth post 218 is nested in the first and second posts 218 completely, the third and fourth post 218 The flange 320 of air damper 400 abuts against aperture 290 and protrudes past its locking press button 294.Flange 320 will be locked Button 294 is forced inwardly to respective stabilizers shell (for example, the first stabilizer bag 270 and second stabilizer bag 440) In hollow space, and and then stabilizer 280,282 is set to shrink for storage.

Some embodiments of the Telescopic ladder 210 illustrated herein can be changed by making ladder 210 stable during use Kind security.For example, some embodiments with the stabilizer 280,282 from its extension of Telescopic ladder 210 ensure The center of gravity of ladder 210 always falls in the horizontal extent (for example, footprint area) of ladder 210 during use, so that minimum Change or eliminate any torque that ladder 210 may during operation overturned.In addition, stabilizer 280,282 can be during storing Shrink, so as to promote the compact footprint area of ladder 210 when not in use.In addition, making the post 218 of ladder 210 shrink meeting automatically Stabilizer 280,282 is shunk, so as to provide the simplicity used.

Therefore, the embodiment of ladder is disclosed.Although being had been described in considerable detail by reference to some disclosed embodiments The embodiment of the present invention, but disclosed embodiment is to present for the purpose of illustration and not limitation, and other embodiments are possible 's.Those skilled in the art will be appreciated that can make without departing from the spirit of the invention various changes, adaptation and Modification.

Claims

1. a kind of folding ladder, it includes：

First ladder portion；

Second ladder portion, it is attached in first ladder portion, first and second ladder portion in hinged way Each include

First terraced frame,

Second terraced frame, the described first and second terraced frames each have multiple posts, axis of the multiple post along the multiple post Placement, and

Multiple steps, it extends between the described first terraced frame and the second terraced frame, and each step is connected to first ladder The post of the post of frame and the second terraced frame；And

A pair of linkages, first ladder portion is connected to second ladder by it around hinge axes in hinged way Part, each linkage is adapted to locking first and second ladder portion to cause first ladder portion and institute State the second ladder portion and form angle therebetween, each linkage includes,

First axle part, it is operably connected to first ladder portion,

Second hinge part, it is operably connected to second ladder portion, and first and second hinge member can enclose Rotated relative to each other around the hinge axes,

Shift mechanism, it includes

Shift mode, it is defined by the multiple slits being positioned in periphery on the first axle part, and each slit corresponds to First ladder portion is relative to the Angle Position of second ladder portion, and adjacent slots are with along the first axle portion The distance separation of the periphery definition of part, and

Selector pin, it is adapted to shift in the shift mode, and is received by slit with by second ladder portion It is locked in the Angle Position relative to first ladder portion.

2. folding ladder according to claim 1, it further comprises the lockplate in the second hinge part, institute State lockplate including multiple recesses to cause the center of the lockplate to be overlapped with the hinge axes, each recess with corresponding to The angle of the angle between first and second described ladder portion is separated with another recess.

3. folding ladder according to claim 2, wherein the angle between first and second described ladder portion At about 0 degree and about between 180 degree.

4. folding ladder according to claim 3, wherein first and second ladder portion can be locked in about 0 degree, About 30 degree and the about angle of 180 degree.

5. folding ladder according to claim 4, wherein the first recess in the multiple recess with it is the multiple recessed About 30 degree, and first recess and the 3rd recess in the multiple recess are the angle ranging between the second recess in portion Between the angle ranging from about 180 degree.

6. folding ladder according to claim 2, it further comprises the stop pin for being connected to the selector pin, institute Stop pin is stated to be adapted to be configured in the axle along the stop pin by the recess receiving of the lockplate, the stop pin The side of line is moved up,

Wherein when the selector pin is moved in the slit of the shift mode, the stop pin is moved to the lockplate Recess in, and

When the selector pin moves away from the slit of the shift mode, the stop pin moves away from the lockplate Recess.

7. folding ladder according to claim 6, wherein the stop pin is configured to

Received first ladder portion and second ladder portion being locked in Angle Position by recess completely；

Retract to discharge first and second ladder portion from Angle Position from recess completely；And

Abutted against when first and second ladder portion is angled with any angle in addition to multiple predetermined angulars described The edge of second hinge part.

8. folding ladder according to claim 1, it further comprises what is be slidably engaged with the first axle part Select the collar, the selection collar and the selector pin joint are closed and be adapted to along set ring axis against the first axle Part is slided.

9. folding ladder according to claim 8, wherein the selection collar is adapted to surround the set ring axis Rotate to move the selector pin along the groove being defined on the first axle part.

10. folding ladder according to claim 1, it further comprises one or more safety indicators, the peace Full indicator is adapted to provide first when first and second ladder portion is locked in Angle Position and indicated and when described the One and second ladder portion unblock when provide second indicate.

11. folding ladder according to claim 1, each of which step include flat upper surface and with it is described flat The relative second surface of upper face, wherein when the first and second ladder portion formation about angle of 180 degree, described the One and second the first surface of ladder portion define flat container support surface.

12. folding ladder according to claim 11, wherein first table of first and second ladder portion At least a portion in face is relative to horizontal plane formation angle.

13. folding ladder according to claim 1, wherein the multiple post is placed in nested arrangement for stretch Miniature formula is moved to axial so that the ladder can extend or shrink along the axis of the multiple post.

14. folding ladder according to claim 13, each of which step is connected to described by connector assembly Post in multiple posts, the connector assembly has the breech lock sub-assembly comprising release button, and the release button can be along The preceding surface of the step slide with unlock or the multiple post of selective lock in two neighbouring posts between it is described relative Axial movement, the preceding surface of the step is essentially perpendicular to the plane with the axis vertical take-off of the multiple post.

15. a kind of folding ladder, it includes：

First ladder portion；

First terraced frame,

First axle part, it is operably connected to first ladder portion,

Second hinge part, it is operably connected to second ladder portion, and first and second hinge member can enclose Rotated relative to each other around the hinge axes, the second hinge part has end, wherein a part for the end is enclosed Be around the hinge axes it is semicircular,

Stop pin, it is elongated, defines the central axis through it, and with non-circular cross sections, the stop pin is installed To the first axle part for being moved along its center axis radially away from towards the hinge axes, the locking Pin is biased towards the hinge axes by radial spring, and the stop pin can surround central shaft by ladder angle selector Line rotates, and the ladder angle selector permits manually selecting for the required angle between first and second described ladder portion,

Multiple recesses, it is respectively radially-inwardly guided since the end of the second hinge part towards the hinge axes, The multiple recess is angularly spaced around the hinge axes, around the Angle Position pair of the hinge axes of each recess Predetermined angular between first and second ladder portion described in Ying Yu,

Each recess has the corresponding ladder angle opening being defined on the end of the second hinge part, each ladder Angle opening has opening shape, and the opening shape is permitted when stop pin rotates to wherein described locking around its center axis The stop pin is inserted through wherein when the orientation of pin cross section is generally matched with the rotation of the opening shape, the opening Shape is not matched with generally when stop pin around the orientation that its center axis rotates to wherein described stop pin cross section Stop that the stop pin is inserted through wherein during the rotation of the opening shape.

16. folding ladder according to claim 15, wherein first ladder portion and second ladder portion Can relative to each other it be rotated around the hinge axes, the institute of first ladder portion and the second ladder portion relative to each other Rotation is stated to be adapted to make the stop pin position close to ladder angle opening.

17. a kind of method of folding telescopic ladder, it includes：

Folding ladder is provided, it includes

First ladder portion,

First terraced frame,

Second terraced frame, the described first and second terraced frames each have multiple posts, and

Multiple steps, it extends between the described first terraced frame and the second terraced frame, and each step is connected to first ladder The post of the post of frame and the second terraced frame, and

A pair of linkages, first ladder portion is connected to second ladder by it around hinge axes in hinged way Part,

First axle part, it is operably connected to first ladder portion,

Second hinge part, it is operably connected to second ladder portion,

Shift mechanism, it includes

Selector pin, it is used to manually select to be in one relative to first ladder portion by second ladder portion Or multiple Angle Positions；

The selector pin is set to move away from the first slit to discharge first and second ladder portion from the first Angle Position；

The selector pin is set to be shifted in the shift mode and close to the second slit；

One of described first and second ladder portion is set to rotate to second jiao of position around the hinge axes in hinged way Put；And

The selector is locked and is fixed in second slit first and second ladder portion being locked in described Two Angle Positions.

18. a kind of folding ladder, it includes：

First ladder portion；

First terraced frame,

A pair of linkages, first ladder portion is connected to second ladder by it around hinge axes in hinged way Part, each linkage is adapted to locking first and second ladder portion to cause first ladder portion and institute State the second ladder portion and form angle therebetween；

The multiple post is placed in nested arrangement for moving to axial with pattern of stretching so that the ladder can edge The axis extension of the multiple post or shrink；

Each step is connected to by connector assembly in the post in the multiple post, first and second ladder portion The connector assembly of the one or more steps of at least one has the first and second release buttons, first release Button can be slided along the preceding surface of the step, and second release button can be slided along the second surface of the step, The first surface and the second surface are reversely orientated, first release button and/or the second release button edge The respective surfaces of the step the slip permit two neighbouring posts in unblock or the multiple post of selective lock it Between described move to axial.

19. folding ladder according to claim 18, wherein first and second release button is coupled to stop pin And spring, the spring apply bias force against the stop pin so that the first post in the stop pin and the multiple post and Second post is engaged with moving to axial between the first post described in selective lock and second post, described first and second The sliding motion of any one of the release button along the corresponding preceding surface or rear surface the stop pin is retracted with Unlock first and second post and so as to permit moving to axial therebetween.

20. folding ladder according to claim 12, wherein when first ladder portion and the second ladder portion / the angle be less than about 90 degree when, the first surface of the step of first ladder portion it is described into Angle part defines flat upper surface, and the angulation of the first surface of the step of second ladder portion Define flat lower surface in degree part so that the flat lower surface of second ladder portion is faced and the described first ladder The opposite direction of the flat upper surface of the step of subdivision.

21. folding ladder according to claim 20, wherein described between first and second described ladder portion Angle be about 180 degree when, the angled portion of the first surface of the step of second ladder portion is faced With the first surface identical direction of the step of first ladder portion so that the first and second ladders portion The angled portion of the first surface divided defines flat container support surface.

22. folding ladder according to claim 21, wherein when first ladder portion and the second ladder portion / the angle be less than about 90 degree when, the angled portion is not defined in the step of second ladder portion The second surface on, so as to prevent user from stepping on thereon.

23. a kind of Telescopic ladder, it includes：

First terraced frame,

Second terraced frame, the described first and second terraced frames each have

Multiple posts, its be placed in nested arrangement for flexible axis of the pattern along the multiple post extended position with Moving to axial between retracted position, wherein,

Second post of the first post of the described first terraced frame and the second terraced frame each has hollow body, described first and second The floor surface that post is positioned at close to the ladder, first post have with the axis coaxle of the multiple post it is fixed Flange in the hollow body of first post,

Multiple steps, it extends between the described first terraced frame and the second terraced frame, and each step is connected to first ladder The post of the post of frame and the second terraced frame；

First stabilizer bag, it is connected to first and second post, and first stabilizer bag stretches close to described The floor surface that formula ladder is positioned at, first stabilizer bag has hollow body part；And

First stabilizer, it is slidably attached to first stabilizer bag, and first stabilizer is adapted in extension Moved between position and retracted position, wherein, in the extended position, first stabilizer extends first stabilization The hollow body part of device shell, first stabilizer is in the extended position in the axle with the multiple post The generally normal side of line extends upwardly past the described first terraced frame, and first stabilizer is adapted in the punctured bit Put and be retracted in the hollow body part of first stabilizer bag, first stabilizer includes locking press button, The locking press button is adapted to protrude past the aperture that is defined on first stabilizer bag with by first stabilization Device is locked in its extended position, wherein, the extension bit of the locking press button and the aperture in first stabilizer With the axis coaxle of the multiple post in putting, and

The Telescopic moving wherein due to the multiple post on the direction towards first stabilizer bag, it is described convex Edge abuts against the locking press button in the aperture for protruding past first stabilizer bag, and the flange is against described The locking press button is forced away from the aperture by the adjoining of locking press button, and so that first stabilizer prolongs from it Position is stretched to unlock and enter the retracted position.

24. Telescopic ladder according to claim 23, its further comprise with the multiple post coaxially position it is multiple Air damper, the air damper is adapted to limit the described of the multiple post and moved to axial.

25. Telescopic ladder according to claim 24, wherein lower surface of the flange from the first air damper Extension, the locking press button described in the extended position in first stabilizer protrudes past first stabilizer bag The aperture when described in the first air damper and first stabilizer the locking press button it is coaxial.

26. Telescopic ladder according to claim 25, it further comprises being connected to first stabilizer bag Second stabilizer, second stabilizer can be activated by the flange being positioned in the lower surface of the second air damper, described Second stabilizer can be activated between the extended position and the retracted position, and the extended position is used to perpendicular to described The side of the axis of multiple posts extends upwardly past the multiple post, and the retracted position is to be slidably retracted to described the In the hollow body part of one stabilizer bag.

27. Telescopic ladder according to claim 26, wherein first air damper is coupled to the 3rd post so that The nesting of 3rd post towards first post is mobile to make the flange of first air damper towards described first The aperture movement of stabilizer bag.

28. Telescopic ladder according to claim 27, wherein first air damper, which has, is defined in its periphery Tab on surface, the tab has the taper preceding limb promoted with the engagement of the corresponding opening of the 3rd post, and Prevent the tab from the upright tail edge of the removal of the 3rd post.

29. Telescopic ladder according to claim 28, wherein the flange of first air damper is adapted Into the locking press button is forced away from into the aperture when the 3rd post is nested in first post completely and made described First stabilizer shrinks.

30. Telescopic ladder according to claim 29, wherein first air damper is coupled to the 3rd post To cause the tab of first air damper to protrude past the corresponding opening of the 3rd post, the institute of the 3rd post Opening is stated close to the bottom peripheral edge of the 3rd post.

31. Telescopic ladder according to claim 26, wherein first and second stabilizer, which has, is equal to described the The length of about half of the length of one stabilizer bag.

32. a kind of folding telescopic ladder, it includes：

First ladder portion,

Second ladder portion, it is hingedly connected to first ladder portion to cause the first and second ladders portion Dividing can rotate around hinge axes, and each of described first and second ladder portion includes

First terraced frame,

Second terraced frame, the described first and second terraced frames each have multiple posts, axis of the multiple post along the multiple post It is placed in for moving to axial with pattern of stretching in nested arrangement, and

Multiple steps, it extends between the described first terraced frame and the second terraced frame, and each step is connected to first ladder The post of the post of frame and the second terraced frame,

First stabilizer bag, it has the hollow body part of first ladder portion, including

A pair of stabilizers, it is adapted to extend upwardly past institute in the side generally normal with the axis of the multiple post State each of described first and second terraced frames of the first ladder portion and be retracted to the institute of first stabilizer bag State in hollow body part.

33. folding telescopic ladder according to claim 32, wherein first and second ladder portion is foldable To cause first and second ladder portion to form first angle therebetween, the first angle is equal to about zero degree and about 180 Between degree.

34. folding telescopic ladder according to claim 33, it further comprises the of second ladder portion Two stabilizer bags, second stabilizer bag includes a pair of stabilizers, the stabilizer be adapted to it is the multiple The side that the axis of post is generally normal is extended upwardly past in the described first and second terraced frames of second ladder portion Each and be retracted in the hollow space of second stabilizer bag.

35. folding telescopic ladder according to claim 34, wherein when first and second ladder portion is at it Between when forming the about angle of zero degree, the floor surface that first and second stabilizer bag is installed on close to the ladder.

36. folding telescopic ladder according to claim 34, wherein first and second ladder portion is described Stabilizer is adapted to be retracted to respectively outside first stabilizer when the multiple post is nested in interior each other with flexible pattern So that the ladder is retracted in retracted position in the hollow body part of shell and second stabilizer bag, and wherein The stabilizer of first and second ladder portion is adapted to when the multiple post is adapted to extend with flexible pattern When extend first and second stabilizer bag respectively.

37. folding telescopic ladder according to claim 32, each of which stabilizer can be independently and separately from separately One stabilizer and extend.