CN101918671B - Telescopic ladder assembly - Google Patents
Telescopic ladder assembly Download PDFInfo
- Publication number
- CN101918671B CN101918671B CN2008801238043A CN200880123804A CN101918671B CN 101918671 B CN101918671 B CN 101918671B CN 2008801238043 A CN2008801238043 A CN 2008801238043A CN 200880123804 A CN200880123804 A CN 200880123804A CN 101918671 B CN101918671 B CN 101918671B
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- Prior art keywords
- ladder
- crosspiece
- actuator
- ladder assembly
- section
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
- E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/082—Connections between rungs or treads and longitudinal members
- E06C7/086—Connections between rungs or treads and longitudinal members with a connecting piece inserted in a hollow rung
Abstract
A telescopically extendable and collapsible ladder assembly having at least three ladder sections, each of said ladder sections having two tubular stile members arranged parallel to each other and interconnected at one end by a ladder rung to form a U-shaped ladder section; the stile members of each ladder section being telescopically inserted into the stile members of an adjacent ladder section. The ladder assembly further comprises automatic latch mechanisms for locking the telescopically inserted stile members relative to one another when the ladder sections are extended, the latch mechanisms being associated with actuators for unlocking the stile members in order to allow for collapsing of the ladder assembly.
Description
Technical field
The present invention relates to have the scalability ground elongation of at least three ladder section and the ladder assembly that shrinks; Each of said ladder section has two tubulose side frame spares, and these two side frame spares are arranged as parallel and at one end interconnect to form the U-shaped ladder section through rung; The side frame spare telescopically of each ladder section is inserted in the side frame spare of adjacent ladder section.Ladder assembly further comprises automatic latching device; Be used for when ladder extends, locking the relative to each other side frame spare of retractility ground insertion; The latching device of each ladder section is associated with one or more actuators, is used for release side frame spare so that allow ladder assembly to shrink.
Background technology
These ladder assemblies as handy ladder for example linear telescopic ladder or stepladder become quite popular, the installation material that also is used for fixing for example provides the attic ladder of leading to loft.
The design of the prior art of such ladder assembly is open as far back as the U.S. Pat 1712942 (Smith) of nineteen twenty-nine.More recent design is disclosed among EP 527766, EP 1402143, GB2263932 (Telesteps), WO 2004/013445 (Core Distribution), US 5743355 (McDonnell), the US 5738186 (Foxdale).
Summary of the invention
The design of prior art has the details not as people's will in their structure and/or their actual user's mask.Therefore, the present invention is devoted to propose to realize improved means.These means can be used separately or Combination application.In highly preferred embodiment of the present invention, all means are applied in the ladder assembly to obtain optimum result.
First aspect of the present invention relates to the problem of the retardance of the speed that one or more sections of ladder assembly gravity causes.Like what in US 5743355, explain in more detail, telescopic ladder assembly in contraction process (when the ladder section of vertical ladder or stepladder reduces) and/or in elongation process (for example in attic ladder is settled) can suffer the problem of the one or more sections speed of not expecting at the volley of ladder.
The air aperture in the air damper of must flowing through when this air damper is provided at ladder and shrinks is provided in US 5743355 by " air damper ".This solution has been found to be unpractical.
First aspect of the present invention provides the ladder assembly according to the preamble of claim 1; It is characterized in that; Damping device is the frictional damping device; It is based on providing retardance with the inner skin friction of the side frame spare of adjacent ladder section, and different surface frictional resistance is provided the damping device of each ladder section so that the gross weight of compensation ladder section to be blocked.
Be to be understood that; When ladder shrinks; The last ladder section that relative weight is lighter only needs minimal damping or possibly not need damping, is positioned at more following ladder section thus and preferably is provided with frcition damper, and this frcition damper provides the skin friction resistance of continuous increase.
In a preferred embodiment, the damping device on a ladder section is to be processed so that realize the damper of these groups by the material with the modulus of elasticity that is different from the damping device on another ladder section when being compared to each other, to have different surface frictional resistance.These materials are plastic material preferably, most preferably is injection-molded plastic material, to form damping device.
In actual design, damping device is to be processed by the fiber reinforced plastics material, and the difference of modulus of elasticity obtains through the percentage and/or the component of adaptive fibrous material.For example, use the glass filled composite plastic, the damping device that is positioned at the below has than being positioned at the higher glass percentage of damping device of the ladder section of top.
In highly preferred embodiment; Telescopic ladder assembly according to a first aspect of the invention, for example vertical ladder (for example has automatic latching device; Each end at crosspiece); This mechanism have one or more relevant can manually operated actuator, be used for release side frame spare so that allow the telescopic ladder sub-component, wherein these one or more actuators are placed in central authorities' (preferably forwardly) of rung and can operate simultaneously through user's one hand.Have been found that the damper of suggestion allows to obtain the very controlled motion of ladder section when ladder shrinks.The user can operate one or more actuators through a hand at present simultaneously, guides the ladder section that is just descending and/or in this operating process, stablizes ladder with the another hand simultaneously.Ladder is operated in this permission safely in contraction process, avoid the ladder section rapid movement of the observed decline of meeting in known extension ladder and the impact of not expecting.
Second aspect of the present invention relates to the ladder assembly according to the preamble of claim 7.
In EP 1402143, be disclosed in the anterior of crosspiece and settle actuator so that each actuator can keep his hand and manually and individually be able to operation around the connector that side frame spare particularly is centered around side frame spare upper end through the user near side frame spare place.Therefore the design of this prior art requires the user in the contraction process of ladder, to center on his both hands of ladder side frame maintenance.It declares this design safety that between two crosspieces, improves the user of holding owing to the user when ladder shrinks.Although this can be correct from said angle, such fact is not considered in this arrangement, and promptly the user also need stablize ladder so that ladder can not wave or strike some objects in contraction process under many situations.
Second aspect of the present invention is devoted to provide a kind of improved telescopic ladder assembly; It allows user to use one hand to actuate can manually operated actuator and use his another hand to be used for other purpose, for example grips ladder in the position of more leaning on to keep ladder stabilizer and/or in ladder decline process, to guide ladder section.
Second aspect of the present invention realizes this purpose through providing according to the telescopic ladder assembly of claim 7; Said ladder assembly is characterised in that; Actuator be placed in the central authorities of crosspiece and in the front side of crosspiece can operating simultaneously through one hand, and the antetheca of crosspiece has the elongated sunk part on its whole length, actuator is placed in the said sunk part; Each actuator has the rear portion extension; Thereby extend through the inside of the slot entering crosspiece in the said antetheca, each said rear portion extension is connected to action bars, and this action bars extends to the latching device on the crosspiece exterior extremity in said crosspiece inside.
Preferably, actuator is an actuator slidably, thereby in the sunk part of antetheca, slides.
Settle preferably slidably that actuator has such advantage in the sunk part of elongated, promptly actuator generally can not injure the people's on the ladder foot, but still can have suitable thickness operates especially to point through one hand.
A plurality of slots in the antetheca or single adjoin in the sunk part that slot preferably is positioned at antetheca.
Preferably, actuator be arranged as effectively the phase mutual edge distance less than 10 centimetres to help one-handed performance.
Preferably, actuator projects to many 10 millimeters in the front of crosspiece from crosspiece, and preferably at the most 5 millimeters, more preferably between 1 and 4 millimeter.As stated, the position of these actuators in the elongated sunk part of antetheca provides the protection to actuator.But, have been found that " some projections forward " of the actuator of these centrally-located causes such effect, promptly actuator offers extra the gripping of hand of grabbing around the crosspiece middle body.In practice, thus actuator will drop in the palm of hand extra gripping will be provided.
The third aspect of the invention relates to the ladder assembly of the preamble of claim 13.
In EP1402143; The preamble of claim 13 is based on said EP1402143; Each ladder section is included in each terminal connector of crosspiece, and this connector has the crosspiece part that is connected to the crosspiece end and has front and rear lining portion, and each partly combines at an one of which end and crosspiece; Two lining portions are roughly around side frame spare; Lining portion has isolated terminal relatively, and fastener assembly is configured to the terminal relatively of bridge joint liner section, is used for around the side frame spare lining portion that is coupled rigidly.As can from Figure 11,12 of said EP1402143 document, find out, opposing ends is positioned at along the crosspiece longitudinal axis.The protrusion that said end has a transverse projections to hold towards the screw bolt and nut that hauls said end each other so that lining is fixed on around the side frame spare.This transverse projections protrusion is clumsy, particularly in ladder being stored in for example little cupboard or little van aspect.
In WO 2007/079379, the different designs of connector is shown, it has two.One is connected to crosspiece and comprises lining half.Another piece is through half lining of two bolton on another piece.Interface (place that the end of two and half linings converges) meets at right angles with the crosspiece longitudinal axis.This solution is complicated and also unsatisfactory, because use two bolts that lining is clamped on the side frame spare.
The third aspect of the invention is devoted to provide the telescopic ladder assembly according to the preamble of claim 13, and it has improved design aspect the carrying of ladder manufacturing and ladder.
This purpose passes through to realize according to the ladder assembly of the preamble of claim 13 that it is characterized in that, front lining portion becomes 120 and 150 degree with respect to the crosspiece longitudinal axis, and more preferably the angle between 130 and 140 degree is extended, yet back bush portion is with the angle extension of complementation.
This position that has been found that lining " splitting " has lining effectively is clamped to the effect on the post (style).
Preferably, lining portion its relatively the adjacent part that forms with respect to the exterior face of lining portion of the exterior face on the end be the projection of general triangular.Notice that this design can be advantageously used in extension ladder, wherein actuator position is next-door neighbour's side frame spare.
Fourth aspect of the present invention relates to the design of the crosspiece of telescopic ladder assembly.Usually, rung is formed by the tubular profile of the aluminium of extrusion modling, and this profile comprises roof, diapire and antetheca that between roof and diapire, extends and rear wall.
According to a forth aspect of the invention; Provide like the telescopic ladder assembly in the claim 16 with crosspiece; The antetheca of its middle rail and each of rear wall have the elongated sunk part on its length; This sunk part has the preferably height between 15 and 25 millimeters, and this sunk part has at least 2 millimeters the degree of depth.
Sunk part is set in antetheca and rear wall gives the stability that crosspiece improves; Thereby allow especially in the said recess walls part in the middle section of crosspiece one or more holes or slot to be set, be used to install the one or more actuators relevant with latching device.
In the preferred embodiment of crosspiece, the roof cross section is protruding upward, and the diapire cross section is to being recessed on, preferably protrude and the curvature that is recessed into roughly the same.Preferably, antetheca and rear wall are symmetrical.
Will be appreciated that, various aspects of the present invention can use separately or with various Combination application in ladder assembly.Can predict the result who is applied to provide in the ladder assembly optimum of all aspects.
Description of drawings
To explain the present invention in more detail with reference to accompanying drawing at present.In the accompanying drawings:
Fig. 1 illustrates and is in the lateral view according to linear telescopic ladder of the present invention that shrinks under the situation;
Fig. 2 illustrates the plan view of the ladder of Fig. 1;
Fig. 3 A illustrates according to the side frame spare of ladder assembly of the present invention and the decomposition view of frcition damper;
Fig. 3 B illustrates the frcition damper of different angles;
Fig. 4 illustrates the cross sectional view according to the crosspiece of ladder of the present invention;
Fig. 5 illustrates folded each other two crosspieces that lean on;
Fig. 6 illustrates has the crosspiece as shown in Figure 4 and the phantom drawing of the part of the ladder of actuator slidably;
Fig. 7 illustrates has slidably Fig. 4 of actuator and 6 crosspiece;
Fig. 8 A-8C illustrates slidably actuator;
Fig. 9 illustrates the middle body that held is lived the crosspiece of Fig. 6; And
Figure 10 A-10D illustrates the connector according to ladder assembly of the present invention.
The specific embodiment
Fig. 1 and 2 illustrates the example according to ladder assembly of the present invention, is embodied as linear telescopic ladder 1 at this.Explain that as top ladder assembly can also be the part of another kind of " ladder product ", for example stepladder or make up ladder, have the working platform etc. of the ladder of similar Retractive leg.
Ladder 1 comprises nethermost ladder section 2, and this nethermost ladder section has two tubulose side frame spare 2a, the 2b that settles in parallel with each other.Each side frame spare 2a of nethermost ladder section 2,2b are provided with ground connection heel piece 2c (for example rubber etc.) at this.
Side frame spare 2a, 2b in their upper end through rung 2d interconnection and in this example (as preferred) also through nethermost rung 2e interconnection.
Ladder 1 further comprises at least two other ladder section, is ladder section 3-9 at this.These ladder section 3-9 has two to be settled in parallel with each other and interconnects to form the tubulose side frame spare of U-shaped ladder section through rung in the upper end.Be inserted in the side frame spare of following adjacent ladder section to the side frame spare retractility of each ladder section.
Ladder 1 comprises that further automatic latching device (like what will explain in further detail through example below) is used for when ladder section is extended, locking the relative to each other side frame spare of retractility ground insertion; This latching device is associated with actuator, is used for release side frame spare so that allow to shrink or the ladder assembly that bounces back.
As can be as can be seen from Figure 1, these actuators are manually operated actuators, with reference to 10 expressions of the Reference numeral among Fig. 1, actuator 10 is actuators slidably, and medially is arranged on the front side of crosspiece 2d so that can operate simultaneously by enough one hands.
Crosspiece 2d-9d is connected to relevant side frame spare 2a, 2b via connector 2f, 2g, and the preferred embodiment of connector will be through illustrating with reference to Figure 10 A-10D.
Like what explained, with extension ladder for example ladder 1 relevant problem be the speed of when ladder elongation (perhaps when the time) telescopic section when ladder shrinks as attic ladder etc.In order to block said speed; A plurality of ladder section preferably are provided with damping device; It provides ladder section to shrink and/or the retardance of the speed that the gravity of ladder section causes during elongation, and each damping device is placed on the side frame spare on the inboard with the side frame spare that is bonded on adjacent ladder section.
In Fig. 3, an example of frictional damping device 30 of the present invention is shown, it is as unique real source, and the retardance of expectation is provided based on the skin friction with the inside of the side frame spare of following ladder section.
The effective weight of ladder section to be blocked is also inequality from top to bottom; Its said direction from top to bottom in ladder 1 effectively increases, because for example section 3 motion that causes all ladder section above said section 3 equally towards the release and the subsequent contraction of following ladder section of ladder section.Therefore, the gross weight of compensation ladder makes that compare lower section resistance with higher ladder section bigger thereby the damping device 30 of advising each ladder section provides different surface frictional resistance.
Preferably, the damping device that different surfaces frictional resistance is provided is by the material with different moduli of elasticity, preferred plastic material, and most preferably injection-molded plastic material is processed.This can accomplish through made damping device (preferably as single part) by the fiber reinforced plastics material in the solution of reality, and different moduli of elasticity obtains through the percentage and/or the component of adaptive fibrous material.
For example, the plastic material of damping device 30 is glass filled, for example the nylon of glass filled.
In example shown in Figure 3; As preferably, damping device 30 has circumferential body, this main body have its end be inserted in the side frame spare on fastening part 31; And having a plurality of friction lugs, this lug extends below circumferential body and is spaced apart from each other at circumferencial direction.
Preferred as further, last fastening part 31 comprises the elastic fastener 33 of one, and this securing member is suitable for being snapped in the associated orifices in the side frame spare, is used for being connected to side frame spare with said 30.
Further preferably, the circumferential body of damping device 30 has annular lip, and this flange is put by side frame spare terminal surface.
To explain others and preferred details with reference to Fig. 4-10 according to ladder assembly of the present invention at present.
Fig. 4,5,7 illustrates the decision design that is used for extension ladder, and it preferably is combined in the ladder according to a second aspect of the invention.
At this, crosspiece is considered to any crosspiece of the ladder 1 of Fig. 1, so that use Reference numeral 2d at this.
As preferably, roof 41 cross sections are protruding upward, and diapire 42 cross sections are to being recessed on.As preferably, curvature is identical so that crosspiece contacts with each other under contraction state therein (as preferred) the ladder design in, roof closely contacts (see figure 5) with diapire.This is provided at the stability of ladder under the said contraction situation and is avoided object to get into the space between the crosspiece.
Antetheca has the elongated sunk part 43a that on its whole length, extends.This sunk part is inwardly setovered about marginal portion 43b, the 43c of the top and following location of antetheca 43.Rear wall has similar sunk part 44a.
As same preferred (especially owing to the reason of making), antetheca and rear wall are symmetrical.These sunk parts preferably at least 5 millimeters, more preferably extend between 15 millimeters and 25 millimeters on the substantial portion of the height of each antetheca and rear wall.The degree of depth can change, and preferably between 3 and 6 millimeters.Crosspiece has good stable property, even the one or more holes or the slot that in by the crosspiece middle section, hold the one or more actuators that are used for latching device are when weakening.
The pattern that the upper surface of the roof of crosspiece preferably is provided with axial notch/rib skids to avoid people's cat ladder period of the day from 11 p.m. to 1 a.m foot.
As can in Fig. 1,6,7 and 9, find out, slidably actuator 10 is placed among the said sunk part 43a.
As at Fig. 1,6, shown in 9, this slidably actuator 10 be placed in the central authorities of crosspiece 2d-9d, in the front side of crosspiece 2d-9d, so that can operate simultaneously through one hand.
In this example, each crosspiece 2d is provided with two slots in targeting part 43a, and each actuator 10 has rear wall extension 11, and it extends through the inside (referring to Fig. 7) that slot gets into crosspiece.
As preferably, each of extension, said rear portion 11 is connected to parts (in Figure 10 B, partly illustrating with Reference numeral 60), and these parts extend to the latching device (not shown) at crosspiece exterior extremity place in said crosspiece inside.
As preferably, actuator 10 and not exclusively being hidden in the depression slidably, but the front side from crosspiece projects to many 10 millimeters in the front portion of crosspiece, preferably at the most 5 millimeters, more preferably between 1 and 4 millimeter.This is shown in Fig. 7, and it illustrates outstanding 2 millimeters forward.
Through major part is hidden in the depression, some foot that has avoided that actuator 10 climbed up or climb down damages, and/or in storage and transportation, is damaged.
As same preferred, manually sliding actuator is 10 spaced apart 15 centimetres at the most, more preferably at the most 10 centimetres.This allows easily one-handed performance at two actuators 10 of crosspiece middle body; So that operator or ladder user can use his or her another hand be used for other purpose, for example through catching ladder to keep ladder stabilizer in the position that is higher than actuator to be operated 10 so that discharge ladder section.
With some " to front protrusion " combinations the time, the grip part that the people can have on rung when these actuators joined then around the people medially remains on hand crosspiece, as shown in Figure 9.This is the normal route that the people climbed up and climbed down ladder, and any extra grip part all is useful.
Because ergonomics, slidably actuator 10 preferably has at least 10 millimeters, preferably the height between 15 to 25 millimeters.
Shown in Fig. 7,8A-8D, the extension, rear portion 11 of actuator 10 preferably includes and is suitable for being engaged in bar bite on every side.This helps the packaging technology of ladder assembly.
To explain the third aspect of the invention in further detail with reference to Figure 10 A-10D at present.
Figure 10 A-10D illustrates connector, is connector 2f at this, and it will be connected to the upper end of side frame spare (at this 2a) at its terminal crosspiece (for example crosspiece 2d).Notice that preferably, all connectors of ladder assembly all are essentially identical designs, though yardstick is suitable for the diameter (shown in the occasion of Fig. 1) of side frame spare.
Two lining portions 52,54 are roughly around side frame spare.Lining portion 52,54 has isolated a little terminal relatively, and fastener assembly is configured to the terminal relatively of bridge joint lining portion, is used for lining portion is coupled in around the side frame spare.
As in the third aspect of the invention, anterior lining portion 52 extends with the angle between 120 and 150 degree with respect to the longitudinal axis of crosspiece, and more preferably between 130 and 140 degree, and lining portion 54 in rear portion extends with the angle of complementation.In Figure 10 A-10D, anterior lining portion extends with preferred 135 degree.
It is porose 56 that the end relatively of lining portion is provided with, and screw or bolt are installed (not shown) through this hole, and said hole for example at one end has depression, is used for bolt head and nut and is recessed in relative lining portion end.
As very preferably, the exterior face of lining portion 52,54 is roughly leg-of-mutton projection 57 (as can in Figure 10 A, 10B, find out) at its terminal relatively adjacent part that forms with respect to the exterior face of lining portion.This projection 57 is not being that the mode of horizontal expansion as the ladder in the Telesteps document is for holding securing member for example screw or bolt provider part.Have been found that the orientation of splitting between the lining portion allow around bar lining easily with accurately tensioning, better than 180 known degree designs, and better easier than the 90 degree designs of mentioning of Core Distribution document.
Connector body is preferably processed by plastic material, and the optimum fiber reinforced plastic material preferably is made for single main body through injection-molded.
The main body that those skilled in the art will recognize that connector is used herein to lock pin 60 (it can form the extension of the said bar that is attached to sliding actuator 10 or be connected to said bar) and allows to hold spring 61; Be used for (usually towards the said lock pin of latched position bias voltage; At the elongation state of ladder section, side frame spare has relevant lock pin opening to receive said lock pin).
Will be appreciated that, the third aspect of the invention can with the actuator with next-door neighbour's ladder side frame spare, for example the telescopic ladder assembly Combination application of the manually operated or automatic actuator among the EP527766.
As preferably; And it is well known in the prior art; Each comprises the lock pin of the length of the hollow space with the inside that is enough to extend through the lock hole of location ladder section above that and get into side frame spare the automatic latching device of ladder of the present invention; And side frame spare with the extension below lock hole; So that when last ladder section discharges in the ladder section in the middle of also being inserted into to retractility, it is that with respect to following ladder section locking, top ladder section stops at safe position through the lock hole of ladder section in the middle of the lock pin joint of following ladder section; Distance is inserted in a safe distance in the interlude fully; For example between 3 and 10 centimetres, it is the extension through the lower end of the side frame spare that engages top ladder section, below the lockpin ventilating of ladder section cross lock hole get in the middle of in the hollow space of side frame spare of ladder section.
Claims (14)
1. scalability ground elongation and the ladder assembly that shrinks; This ladder assembly has at least three ladder section; Each said ladder section have two tubulose side frame spares (2a, 2b), these two tubulose side frame spares settle in parallel with each other and at one end through rung (2d) interconnection to form the U-shaped ladder section; Be inserted in the side frame spare of adjacent ladder section to the side frame spare retractility of each ladder section
Said ladder assembly further is included in the automatic latching device (60 on each end of crosspiece; 61); Be used for when said ladder section is extended, locking the relative to each other side frame spare of retractility ground insertion; Each of said latching device is associated with actuator (10) slidably, is used for the said side frame spare of release so that allow to shrink said ladder assembly
Wherein said rung (2d is to be processed by the tubular profile of the aluminium of extrusion modling 9d), and this profile comprises roof, diapire and the antetheca and the rear wall that between said roof and said diapire, extend, and this antetheca is symmetrical with this rear wall,
Said actuator (10) is placed on the front side of said crosspiece; The said antetheca (43) of wherein said crosspiece has the elongated sunk part (43a) that on its whole length, extends; This sunk part (43a) is positioned at following and marginal portion location above said antetheca (43b) inwardly biasing of the marginal portion (43b) of the top location of said antetheca
Said actuator is placed in the said sunk part; The slot that each actuator (10) extends through in the said antetheca enters into said crosspiece inside; Each said actuator is connected to action bars; This action bars extends to the latching device (60,61) at the exterior extremity place of said crosspiece in said crosspiece inside
It is characterized in that said actuator (10) medially is placed on the front side of said crosspiece, can operating simultaneously through one hand,
And being that said antetheca also has the marginal portion (43c) under elongated sunk part (43a), said sunk part (43a) is also with respect to the inwardly biasing of marginal portion (43c) of the following location of said antetheca (43).
2. ladder assembly as claimed in claim 1, wherein, said crosspiece (2d) has roof (41), and the cross section of this roof is protruding upward, and the cross section of said diapire (42) is to being recessed on.
3. ladder assembly as claimed in claim 2, the curvature of wherein said roof (41) and said diapire (42) is identical, and wherein said ladder is designed to so that said crosspiece contacts with each other under contraction state.
4. like a described ladder assembly among the aforementioned claim 1-3, wherein, said actuator (10) projects to many 10 millimeters in the front of said crosspiece (2d) from said crosspiece.
5. like a described ladder assembly among the aforementioned claim 1-3, wherein, said actuator (10) projects to many 5 millimeters in the front of said crosspiece (2d) from said crosspiece.
6. like a described ladder assembly among the aforementioned claim 1-3, wherein, said actuator (10) is outstanding from said crosspiece in the front of said crosspiece (2d), and outstanding amount is between 1 and 4 millimeter.
7. like a described ladder assembly among the aforementioned claim 1-3, wherein, said actuator (10) has at least 10 millimeters height.
8. like the described ladder assembly of aforementioned claim 4, wherein, said actuator (10) has at least 10 millimeters height.
9. like the described ladder assembly of aforementioned claim 5, wherein, said actuator (10) has at least 10 millimeters height.
10. like the described ladder assembly of aforementioned claim 6, wherein, said actuator (10) has at least 10 millimeters height.
11. like a described ladder assembly among the aforementioned claim 1-3, wherein, said actuator (10) has the height between 15 and 25 millimeters.
12. like the described ladder assembly of aforementioned claim 4, wherein, said actuator (10) has the height between 15 and 25 millimeters.
13. like the described ladder assembly of aforementioned claim 5, wherein, said actuator (10) has the height between 15 and 25 millimeters.
14. like the described ladder assembly of aforementioned claim 6, wherein, said actuator (10) has the height between 15 and 25 millimeters.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1034629 | 2007-11-02 | ||
| NL1034629 | 2007-11-02 | ||
| PCT/NL2008/000033 WO2009057995A1 (en) | 2007-11-02 | 2008-01-30 | A telescopic ladder assembly |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100659161A Division CN102168521B (en) | 2007-11-02 | 2008-01-30 | A telescopic ladder assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101918671A CN101918671A (en) | 2010-12-15 |
| CN101918671B true CN101918671B (en) | 2012-11-07 |
Family
ID=39684326
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801238043A Active CN101918671B (en) | 2007-11-02 | 2008-01-30 | Telescopic ladder assembly |
| CN2011100659161A Active CN102168521B (en) | 2007-11-02 | 2008-01-30 | A telescopic ladder assembly |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100659161A Active CN102168521B (en) | 2007-11-02 | 2008-01-30 | A telescopic ladder assembly |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP2215323B1 (en) |
| CN (2) | CN101918671B (en) |
| WO (1) | WO2009057995A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8225906B2 (en) | 2008-08-22 | 2012-07-24 | Core Distribution, Inc. | Extendable/retractable ladder |
| EP2486214B1 (en) | 2009-10-07 | 2013-12-11 | Lampe Holding B.V. | Portable ladder with a stand off device |
| CN102140872A (en) * | 2011-03-05 | 2011-08-03 | 宁波超腾照明电器有限公司 | Safety telescopic ladder capable of being automatically gathered in slow descending mode under action of air resistance |
| CN102733751B (en) * | 2012-06-26 | 2015-02-25 | 宁波兴富工具有限公司 | Anti-hand-pinching safe telescopic ladder |
| FR3006361B1 (en) | 2013-05-29 | 2015-05-15 | Zhuhai Quan Da Industry Commerce Co Ltd | TELESCOPIC LADDER |
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| CN110139969B (en) * | 2016-11-14 | 2021-09-28 | 兰普控股私人有限公司 | Telescopic ladder assembly |
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- 2008-01-30 CN CN2008801238043A patent/CN101918671B/en active Active
- 2008-01-30 CN CN2011100659161A patent/CN102168521B/en active Active
- 2008-01-30 WO PCT/NL2008/000033 patent/WO2009057995A1/en active Application Filing
- 2008-01-30 EP EP15188391.5A patent/EP2998501B8/en active Active
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| US5645140A (en) * | 1995-05-08 | 1997-07-08 | Mouneimneh; Ghassoub A. | Self-supported collapsible ladder |
| US5743355A (en) * | 1996-07-31 | 1998-04-28 | Mcdonnell; Charles A. | Retractable ladder |
| CN1516775A (en) * | 2001-06-13 | 2004-07-28 | ̩��̩�˹�˾ | Callapsible ladder |
| GB2436584A (en) * | 2006-03-30 | 2007-10-03 | Norman William Liefke | Telescopic extension ladder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102168521B (en) | 2013-07-31 |
| EP2998501A1 (en) | 2016-03-23 |
| EP2998501B1 (en) | 2018-10-10 |
| EP2215323A1 (en) | 2010-08-11 |
| EP2998501B8 (en) | 2018-12-26 |
| CN101918671A (en) | 2010-12-15 |
| WO2009057995A1 (en) | 2009-05-07 |
| EP2215323B1 (en) | 2015-10-07 |
| CN102168521A (en) | 2011-08-31 |
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