WO2007132272A1 - Combinaison échelle/mont-charge pour grenier - Google Patents

Combinaison échelle/mont-charge pour grenier Download PDF

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Publication number
WO2007132272A1
WO2007132272A1 PCT/GB2007/050265 GB2007050265W WO2007132272A1 WO 2007132272 A1 WO2007132272 A1 WO 2007132272A1 GB 2007050265 W GB2007050265 W GB 2007050265W WO 2007132272 A1 WO2007132272 A1 WO 2007132272A1
Authority
WO
WIPO (PCT)
Prior art keywords
ladder
lift carriage
movable portion
frame
lift
Prior art date
Application number
PCT/GB2007/050265
Other languages
English (en)
Inventor
Daniel Harry Corby Quare
Original Assignee
Bu Innovations Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB0609771.1A external-priority patent/GB0609771D0/en
Application filed by Bu Innovations Limited filed Critical Bu Innovations Limited
Publication of WO2007132272A1 publication Critical patent/WO2007132272A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/16—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure
    • B66B9/193—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure with inclined liftways
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/12—Lifts or other hoisting devices on ladders

Definitions

  • the present invention relates to a apparatus and a method of mechanically loading or unloading large or heavy items into an elevated space.
  • the invention has particular application in connection with the mechanical loading of large or heavy items into a loft through an existing loft hatch, whilst still allowing access to the loft through the same hatch by the user.
  • a separate trolley carries a lift platform that may be selectively raised or lowered in order to transport objects to/from the attic space.
  • the trolley is moveable horizontally along a track that may be provided on a floor of the attic space.
  • the trolley At a first end of travel of the trolley along the track, the trolley is disposed laterally alongside and vertically offset from the mounting frame so that the space above the mounting frame is unimpeded to permit a user to access the attic space using the deployed ladder.
  • the trolley At a second end of travel of the trolley along the track, the trolley is aligned vertically with the mounting frame to permit use of the lift platform.
  • the trolley further includes a drive system that controls the movement of four lift tethers that are coupled to corners of the platform, which can be raised by withdrawing the lift tethers, and can be lowered by paying out the lift tethers.
  • the ladder has a track that provides a guide for movement of a lift platform, and the lift platform includes wheels at one end that run on the track.
  • US-A-5911287 discloses apparatus for lifting a load onto a roof of a building based on a sled that slideably contacts ⁇ a ladder, and a lift cable by which the sled may be hoisted and lowered.
  • the invention provides apparatus for lifting a load, comprising : a hatch for a floor or ceiling; a ladder fitted to one side of said hatch and extendable through and below the hatch; a lift carriage for fitting onto the ladder for movement upwards or downwards along the ladder; a hoist attachable to the lift carriage for raising or lowering thereof; and a frame for fitting to the floor or ceiling behind the hatch having a movable portion provided with a support or otherwise configured for receiving the lift carriage on hoisting said lift carriage from said ladder through the hatch, said movable portion being arranged on further hoisting of the lift carriage to pivot to from a lowered position where the support is in register with the top of the ladder to a raised position in which the lift carriage becomes located above and behind the hatch.
  • the apparatus for use with the apparatus as aforesaid, it also provides a frame for fitting to a floor or ceiling behind a hatch, said frame comprising: - a fixed portion for attachment behind the hatch; a movable portion pivoted to the fixed portion and provided with a support or otherwise configured for receiving the lift carriage from the ladder, said pivoting connection between the fixed and movable portions providing for movement between a lowered position where the support can register with the top of the ladder and a raised position in which the lift carriage becomes located above and behind the hatch.
  • apparatus for lifting a load comprising: a hatch for a floor or ceiling; a ladder fitted to one side of said hatch and extendable through and below the hatch; a lift carriage for fitting onto the ladder for movement upwards or downwards along the ladder; a hoist attachable to the lift carriage for raising or lowering thereof; a frame for fitting to the floor or ceiling behind the hatch having a movable portion provided with a support or otherwise configured for receiving the lift carriage on hoisting said lift carriage from said ladder through the hatch, said movable portion being arranged on further hoisting of the lift carriage to pivot to from a lowered position where the support is in register with the top of the ladder to a raised position in which the lift carriage becomes located above and behind the hatch; and at least one lock having an actuator member that becomes displaced from a working position when the movable portion is in its lowered position for control of the state of said lock, said lock being configured (a) to lock the lift carriage to the movable portion when the movable portion is raised and (
  • a frame for fitting to a floor or ceiling behind a hatch comprising: a fixed portion for attachment behind the hatch / a movable portion pivoted to the fixed portion and provided with a support or otherwise configured for receiving the lift carriage from the ladder/ said pivoting connection between the fixed and movable portions providing for movement between a lowered position where the support can register with the top of the ladder to a raised position in which the lift carriage becomes located above and behind the hatch/ and the movable portion carrying a lock configured for locking a lift carriage thereto, said lock being configured so that it is operative when the movable portion is raised and is moved to a release position when the movable portion is in its lowered position.
  • a lift carriage a movable frame portion configured to receive the lift carriage and at least one lock configured when the frame portion is lowered to lock the lift carriage onto the frame portion and configured to release the lift carriage when said frame portion is raised.
  • Fig 1 is a diagrammatic perspective view of portions of a ceiling with a hatch formed therein, and lifting apparatus according to the invention fitted to the hatch/
  • Fig. 2 is a perspective view of a lift carriage and frame structure forming part of "the apparatus of Fig. 1, the lift carriage being shown as it enters a support forming part of the frame;
  • Fig. 3 is a view similar to Fig. 2, but with the lift carriage having completed its movement into the support;
  • Figs. 4 and 5 are views similar to Figs 2 and 3, but with a movable part of the frame structure partly raised and fully raised respectively;
  • Fig. 6 is a section of a ladder forming part of the apparatus of Fig. 1;
  • Fig. 7 is a perspective view of the lift carriage;
  • Fig. 8 is a diagrammatic perspective view of portions of a loft floor with a hatch formed therein and a second embodiment of the lifting apparatus fitted to the hatch, the lifting apparatus and a second embodiment of the lift carriage being shown in a partially raised position;
  • Fig. 9 is a view of the lift carriage and portions of the lifting apparatus of Fig. 8 in a lowered position
  • Fig 10 is a sectional view of the lift carriage and part of the lifting apparatus of Figs 8 and 9, again in the lowered position.;
  • Fig. 11 is a perspective view of a third embodiment of the lifting apparatus and lift carriage, the lifting apparatus being in a fully raised position;
  • Fig 12 is a view of the lifting apparatus and lift carriage of Fig. 11 in a partially lowered position of a' parallelogram linkage forming part of said apparatus;
  • Fig. 13 is a partial view of the apparatus of Figs. 11 and 12 in a fully lowered position of the parallelogram linkage forming part of said apparatus;
  • Fig 14 is an end view of a guide member forming part of the ladder or lifting apparatus with a partial end view of the lift carriage;
  • Fig 15 shows a remote control device
  • Fig 16 is a schematic side view of an automatic switching device
  • Fig 17 is a schematic isometric view of the automatic switch device of Fig 16.
  • the present invention overcomes the problems of the prior art lift devices by providing a means of fitting both a powered lift and a ladder that can operate in the same space.
  • the user first places the load to be lifted onto a platform.
  • the platform is preferably then pulled parallel to the ladder, through the loft hatch via the use of a cable.
  • the cable passes over 1 pulleys and is attached to a winch located in the loft space.
  • the platform is then lifted clear, of the hatch, enabling the operator to climb the ladder, pass through the hatch into the loft space and unload the platform.
  • the operation can then be repeated as necessary or carried out in reverse to take loads safely from the loft down to a lower floor level.
  • the lift may be operated from either the lower floor level or from the upper floor/loft level or any other convenient position.
  • the apparatus therefore has two main functions. Firstly it provides an easy method for accessing the loft via a set of folding steps which when stowed away fold neatly in to the loft. Secondly it allows for single-handed loading and unloading of boxes and other articles into and out of the loft using a remotely controlled hoisting mechanism. The mechanism keeps the load placed on the platform completely stable and level throughout the entire lifting process and can raise the load to a height within the loft that is easy to unload from without bending down thus preventing awkward bending to pick up an often heavy load.
  • the loft loader is configured so that an electromechanical winch hoists a trolley with a horizontal platform mounted to it up inside channels on the front side of the ladder.
  • an electromechanical winch hoists a trolley with a horizontal platform mounted to it up inside channels on the front side of the ladder.
  • the trolley reaches the top of the ladder it rolls into another section of channel mounted on a pivoting frame that moves the platform level further away from the hatch keeping the load level so that there is still space for the user to climb the ladder into the loft and unload the platform.
  • the way in which the trolley rolls into another section of track is by using four wheels in line, on both sides of the trolley.
  • the remaining two wheels keep the trolley level in the channel and moving in the same direction so that it rolls across the gap and into small length of channel (with end stops) mounted on the mechanism in the loft.
  • the mechanism in the loft uses a pivoting four sided frame acting as a flexible parallelogram to ensure the load remains level during the lifting process.
  • the electromechanical winch then hoists the trolley with attached platform using the pivoting parallelogram frame up and across into the loft keeping it level. The user can then climb up the ladder and unload the platform which due to the design of the parallelogram frame is at an ideal height for unloading without bending down.
  • the use of a cut-out mechanism in the winch motor ensures that the lift will not lift more than the design load. It may be arranged to cut out should anything get trapped in the mechanism thus minimising the risk of injury and damage to the motor.
  • the hoisting mechanism may be arranged to automatically shut off at both the bottom of the descent and the top of the ascent using proximity sensors. The person operating the lift can be made aware of this by the hand held control which will show an illuminated arrow in the direction of the platform' s movement which will cut out when the platform reaches then end of its ascent or descent.
  • the invention has also other applications apart from lifting loads into a loft. It can be used for moving loads up and down floors in workshops, factories and storerooms as well as in outside applications.
  • a hatch 10 in a ceiling has fitted thereto a folding ladder 12 formed of segments 14, 16 and 18 hinged together to form a straight continuous ladder as shown.
  • the ladder segments may be folded up to overlie a trapdoor 24 hingedly connected to the hatch, the upper ladder segment 14 being attached to the trapdoor by brackets 20, 22.
  • brackets 20, 22 When folded away for storage the ladder rests neatly on top of the loft hatch and when unfolded ready for use the position of the hinges means that the roller tracks all align so that the trolley can run up and down freely.
  • a wheeled lift platform 32 that can carries a load 30 runs in tracks formed in the sides of the ladder and can be hoisted or lowered by pulling in or paying out a (lift rope or cable 34.
  • a frame structure having a fixed portion 26 and a movable portion 28.
  • the fixed portion comprises a horizontal frame 42 that fits to the ceiling behind the hatch, extending away from the ladder as shown, and a portal structure 40 at the back of the frame 42 and braced to the frame 42 by struts 41 (Fig. 2) .
  • a motor 38 located on or immediately above the frame 42 pays out or pulls in the rope or cable 34 via a pulley 36 on a cross-member forming part of the portal structure.
  • the movable part of the frame structure forms a pair of transversely spaced 4-bar parallelogram linkages comprising fixed rear members 44, 44a, front members 46, 46a, lower members 48, 48a and upper members 50, 50a, pivoted together as shown.
  • the rear members 44, 44a are securely bolted to posts of the portal structure 40, and the two parallelogram linkages are held at the correct spacing by a spacer bar 52.
  • a support 54 is fixed e.g. by bolts to the front members 46, 46a at a predetermined angle thereto corresponding to the angle which will be adopted by the ladder. It comprises a pair of side members whose shapes and spacing correspond to side members 12a, 12b of the ladder (Fig.
  • the lift carriage (Fig. 7) comprises a platform 32a, sides 32b, 32c, a top spacer 32d and four rollers 58 spaced along and projecting outwardly from sides 32b, 32c.
  • the eight wheel system means that all times there are at least two wheels on each side of the trolley engaged in a track thus keeping it in the correct orientation ready for moving from one section of track to another.
  • the four wheels or rollers 58 to each side of the lift carriage or trolley mechanism ensures that the lift carriage or trolley rolls freely from the ladder section of track into the support structure located in the parallelogram frame section 54. This happens when the trolley moves from the top of the ladder track into the parallelogram frame track ready to move up and away from the hatch. This also works in reverse.
  • the eight wheel system means that all times there are at least two wheels on each side of the trolley engaged in a track thus keeping it in the correct orientation ready for moving from one section of track to another.
  • Fig 3 shows the state where the carriage 32 has moved fully up into the support 54 where it contacts end stops, and continued pull on the rope or wire 34 has started to pull the movable part of the frame upwards, the wire being taken up by motor 38, pulley 36 and a further pulley 52 at the front of the movable part of the frame.
  • the parallel linkages start to pivot upwards and fold as shown in Fig 4, the front links 46, 46a and the support 54 maintaining the same attitude during pivoting motion because of the properties of the parallelogram linkage until the fully upright position of Fig. 5 is reached, where the links 48, 48a are upright and abut the posts of the portal structure 40.
  • this invention provides an efficient, safe and cost effective means of raising and lowering large or heavy goods through the same loft hatch as the access ladder.
  • the present embodiment may use the following sequence of operations:
  • the operator can use the loft loader' s steps independently of the loft loading mechanism if he just wants to access the loft space.
  • the loft loader has an integrated set of deep tread aluminium steps which can fold out of the loft as do conventional loft ladders.
  • the parallelogram mechanism Upon operating a down button on a remote control (not shown) the parallelogram mechanism lowers the platform keeping it level until it reaches the top of the steps where the lift carriage can run down inside the extrusions that form the sides of the ladder.
  • the loft loader may be provided with a key operated power switch. This safety feature prevents accidents by ensuring the loft loader cannot be operated by children who do not have a key. • The loft loader may be provided with an emergency stop button which means in the event of an accident the loft loader can easily be powered off.
  • An ⁇ electronic control box for the drive motor may be provided with a current overload detector built in which means that if the winch stalls or an electrical fault occurs the loft loader powers off automatically.
  • a lock that acts between the lift carriage and the movable portion of the frame, and that becomes operable by raising the movable portion of the frame so that when the lift carriage is in position on the movable portion of the frame and the movable portion of the frame is at least partly raised the lift carriage is held in position on the frame, and that is released by lowering the movable portion of the frame so that the lift carriage can be lowered from the frame.
  • the lock may be changed between its locking and released states depending on whether an actuator member is in a working position or is displaced from the working position by contact with means defining a fixed surface when the movable portion of the frame is fully lowered.
  • the fixed surface may, for example, be a region of floor or the like surrounding the hatch.
  • a pair of locks is provided one for each side of the lift carriage.
  • the lock may engage with a roller of the lift carriage or it may engage with a catch member provided on the lift carriage. Operation of the lock may be by gravity, by a spring or by a combination of the two.
  • a' second embodiment of the lifting apparatus in which the support 54 to opposite sides of the frame has hinged thereto a pair of latch members 60 having actuator members or plates 62 that contact the floor around the hatch 10 as the movable part of the frame is in its fully lowered position. Locking, tongues 64 are thereby lifted from slots 66 in the top flanges of support 54, as is apparent in Fig. 9. As the movable part of the frame is lifted, the latch members 60 are returned to their former position by gravity, returning the locking tongues 46 into engagement with rollers 58 of the lift carriage, thereby preventing the lift carriage from rolling off the frame.
  • Figs. 11-14 disclose a further embodiment of the invention which in addition to incorporating a further embodiment of the lock meets a number of additional needs. Problems have been encountered with the durability of aluminium ladders and both from the standpoint of durability and aesthetics it was desired to provide an embodiment based on or usable for a wooden ladder. From the manufacturing standpoint, it is preferable to minimize the component count, and in particular it was considered desirable to find a way of (a) using the fixed part of the frame structure to provide the rear parts of the parallelogram linkages and/or (b) at the front parts of the parallelogram linkages to provide single components that provide the functions of both the front links 46, 46a and the support 54. It was also desirable to reduce materials usage as regards other components.
  • a metallic fixed frame structure is defined by a pair of feet 100, 100a from which a pair of rigidly attached posts 102, 102a arises, the feet and posts being connected by upper and lower transverse spacer bars 103, 105.
  • the rigid attachment is such that the angled support struts 41 shewn in Fig 2 can be dispensed with.
  • This embodiment is designed, so far as possible, to be supplied in a disassembled flat-pack state and to be assembled on site.
  • the spacer bars 103, 105 may be attached between respective posts or feet by means of screws or bolts as shown.
  • An advantage of this arrangement is that the spacer bars 103, 105 may be supplied in a range of lengths to accommodate different widths of hatch and ladder.
  • the upper spacer bar carries a self-lubricating plastics roller 107 over which webbing 109 passes to lift carriage 111 for controlling rise and fall of the movable parts of the frame structure and of the lift carriage.
  • Webbing is good for several reasons. Firstly it looks less industrial. Secondly in the unlikely event of an emergency it can be cut by a knife or by scissors. Thirdly it does not have the "cheese wire look" which may put some people off - especially from a finger trap point of view. Finally if there is any vibration in the webbing and it momentarily touches the wooden ladder then it should not damage the ladder, whereas a steel cable would eventually groove wood with which it can come into contact.
  • Lower parallelogram links 106, 106a are pivotally attached to the feet 100, 100a by means of fixings 108, 108a located at a spacing in front of the posts 102, 102a as shown, and are held at the desired transverse spacing by means of lower parallelogram spacer bar 112, the fixings 108, 108a and those for the spacer bar again being based on screws, bolts or the like to permit supply as a flat pack and local assembly.
  • the spacer bar 112 may be supplied in a range of lengths corresponding to the lengths for the spacer bars 103, 105.
  • Upper parallelogram links 104, 104a are pivotally attached to the posts 102, 102a by means of fixings 110, 110a located at a spacing above the feet 102, 102a as shown, and are held at the desired transverse spacing by means of upper parallelogram spacer bar 114, the fixings 110, 110a and those for the spacer bar 114 again being based on screws, bolts or the like.
  • the spacer bar 114 is also supplied in a range of lengths corresponding to the lengths for the spacer bars 103, 105, 112.
  • front links 116, 116a pivoted to respective upper and lower parallelogram links at pivots 118, 120 which are again based on screws, bolts or other site-assemblable attachments.
  • Each link 116, 116a is of channel section with a relatively deep web 122 (typical depth 10mm) and a shorter out-turned flange 124 (typical width 25 mm) .
  • the web 122 is of full depth only where it interconnects the upper and lower parallelogram links, and forwardly and below the lower links 106, 106a the web has a cut-out 126 defining a less deep region 128 configured to pass through the hatch when the. movable part of the frame defined by the parallelogram linkage is fully lowered.
  • the out-turned flanges 124 which are typically of thickness about 3mm provide rails for guiding movement of the lift carriage 111 onto and off the front of the movable part of the frame and for supporting the lift carriage in position. Their dimensions correspond to those of similar out-turned flanges on the ladder.
  • each parallel linkage is defined by portions of foot 100, 100a and post 102, 102a between the pivot 108, 108a for the lower parallelogram link 106, 106a and the pivot 110, 110a for the upper parallelogram link 104, 104a.
  • a line between each pair of pivots 108,- 108a and 110, 110a in use faces away from the hatch at a ladder slope-like inclination to the vertical e.g. at an angle to the vertical of about 66°. Because of the properties of parallelogram linkages, the front links 116, 116a will be maintained at the same ladder-like angle, and there is no need to provide a separate' support, which provides useful economy in parts inventory.
  • a bell crank member 130 is attached to each of the front links 116, 116a, being pivoted to webs 122 thereof.
  • the upper end of each bell crank member has an in-turned latch bar 132 which locates beneath a projecting catch member 134 of the lift carriage 111 to hold the lift carriage in position on the movable part of the frame.
  • a lower rearwardly facing portion of each bell crank member 130 has attached thereto a depending actuator member 136 which terminates in a roller 138.
  • the movable part of the frame has moved most of the way towards its fully lowered position.
  • the movable frame is controlled by a gas strut 141 connected by pivotal attachments e.g. between post 102 and lower parallelogram link 104 and assists descent of the parallelogram linkage as well as dampening its movement.
  • the gas strut is optional and the apparatus will work effectively without it.
  • a front link spacer bar 140 similar to those previously described carries roller or spool 142 for guiding webbing 109, especially during lowering of the lift carriage 111 from the movable part of the frame and down the ladder, the webbing being attached to cross-bar 144 of the lift carriage.
  • the lower parallelogram links 106, 106a carry floor-contacting feet 145, 145a which define the lowermost position of the parallelogram linkage and which are screw-adjustable in height to cater for unevenness in the floor.
  • Fig 13 shows the movable part of the frame fully lowered into registration with the hatch and with feet 145 in contact with the floor to arrest downward movement of the linkage.
  • Contact of the rollers 138 with the floor causes the bell crank members to rotate clockwise as viewed in Fig 13 to withdraw the latch bars 132, 132a from engagement with the catch members 134, 134a and thereby permit the lift carriage to be lowered off the movable part of the frame under the control of the webbing 109.
  • Fig. 14 there is shown a detail of how the lift carriage runs on a wooden ladder (such ladders being popular) .
  • a wooden ladder such ladders being popular
  • guide rails 152 of angle section e.g. in aluminium, the flanges 154 being outwardly directed.
  • Similar flanges 124 are provided at the front of the movable frame where the lift carriage is to be received.
  • the lift carriage has side members 160 of angle section e.g. in mild steel that carry upper and lower pairs of rollers that run on opposed sides of flanges 154.
  • One of the pairs of rollers identified by reference numerals 156, 158 appears in Fig. 14.
  • the rollers are at a spacing e.g.
  • a platform 162 is supported towards the upper end of side members 160 and in the disclosed embodiment is pivoted at either side to the side members 160 of the lift carriage for rotation from its load-carrying positing shown in an anti-clockwise direction as viewed in Fig. 13 to a raised stowed position where it no longer obstructs the hatch 10 and is folded away when not in use.
  • the hoist 38 in this second embodiment is controlled primarily by a remote control device 200 as shewn in Fig 15, which has up and down switches 201 and 202 respectively. Overrun of the hoist when the carriage 111 has reached its lowermost and its uppermost positions is prevented by the means shewn in Figs 16 and 17.
  • Attached to the rear of the frame 102 is a plate 210. Mounted on this plate 210 is a gate mount 211 in which freely slides a carrier 212 holding a gate 213 and a reed switch 214.
  • the webbing 109 is arranged to pass through the gate except that the webbing carries a magnet 215 sewn thereto and which cannot pass through the gate.
  • the magnet 215 when the lift carriage 111 is approaching the lower floor, the magnet 215 reaches the gate 213 and, while lifting it in the carrier 212 activates the reed switch 214 which turns off the hoist 38.
  • a similar magnet (not shewn) attached to the webbing 109 operates the reed switch 214 when approaching the gate 213 in the opposite direction, when the lift carriage 111 is reaching its topmost position.
  • kits of parts for fitting or retro-fitting to a ladder and hatch include the frame which has fixed and movable portions as discussed, and a lift carriage for movement onto and from the frame, the frame and lift carriage optionally being provided with locking means for holding the lift carriage onto the frame when the movable part of the frame is other than in a lowered position.
  • a locking device to lock the movable member to , the frame in the raised configuration, such locking device perhaps controllable electrically by operation of the switch or perhaps by judicious location of the gas strut 141.
  • the mechanism including items 130, 132, 134 and 136 may be adapted to provide this locking device.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

La présente invention concerne un appareil permettant de lever une charge (30) à travers une trappe (10) à travers dans un plancher ou un plafond. Une échelle (12) installée sur un côté de ladite trappe et peut se déployer au-travers et au-dessous de la trappe. Un chariot de levage (32) se fixe sur l'échelle le long de laquelle il se déplace vers le haut ou vers le bas. Un appareil de levage (38) peut être fixé au chariot de levage par l'intermédiaire d'un câble (34) qui en assure le levage ou l'abaissement. Un cadre (40, 42) se montant sur le sol ou le plafond derrière la trappe (10) possède une partie mobile (28) pourvue d'un support qui reçoit le chariot de levage et le soulève à partir de ladite échelle à travers la trappe. La partie mobile (28) est agencée lors du levage supplémentaire du chariot de levage pour pivoter à partir d'une position baissée où le support coïncide avec la partie supérieure de l'échelle jusqu'à une position soulevée dans laquelle le chariot de levage est positionné au-dessus de et derrière la trappe. Dans divers des modes de réalisation de l'invention, on trouve au moins un verrou dont l'élément actionneur est déplacé à partir d'une position de travail lorsque la partie mobile est dans sa position baissée, ce qui commande l'état dudit verrou, et qui est conçu pour verrouiller le chariot de levage sur la partie mobile lors du levage et libérer le chariot de levage de la partie mobile lorsque cette dernière est en position abaissée.
PCT/GB2007/050265 2006-05-17 2007-05-15 Combinaison échelle/mont-charge pour grenier WO2007132272A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB0609771.1A GB0609771D0 (en) 2006-05-17 2006-05-17 Combination loft ladder & lift
GB0609771.1 2006-05-17
US11/564,534 2006-11-29
US11/564,534 US20070269303A1 (en) 2006-05-17 2006-11-29 Combination loft ladder and lift

Publications (1)

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WO2007132272A1 true WO2007132272A1 (fr) 2007-11-22

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PCT/GB2007/050265 WO2007132272A1 (fr) 2006-05-17 2007-05-15 Combinaison échelle/mont-charge pour grenier

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Cited By (5)

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NO337145B1 (no) * 2014-02-05 2016-02-01 Storepal Systems As Lagringssystem
CN105858273A (zh) * 2016-04-22 2016-08-17 永城煤电控股集团有限公司 选煤厂车厢清理系统及其安全装置
CN111824704A (zh) * 2020-06-15 2020-10-27 安徽长江钢铁股份有限公司 一种紧料车钢丝绳的方法
CN113353763A (zh) * 2021-06-11 2021-09-07 廊坊市维璟节能科技有限公司 一种以梯子为轨道的物料提升设备
US11199049B2 (en) * 2019-02-14 2021-12-14 Tie Down, Inc. Winch utility

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US5738185A (en) * 1995-02-16 1998-04-14 Sears; Michael R. Portable swiveling lift device
US6244381B1 (en) * 2000-02-18 2001-06-12 Timothy E. Ruble Ladder hoist device
GB2414505A (en) * 2004-05-28 2005-11-30 Bu Innovations Ltd Combination loft ladder and lift

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NO337145B1 (no) * 2014-02-05 2016-02-01 Storepal Systems As Lagringssystem
CN105858273A (zh) * 2016-04-22 2016-08-17 永城煤电控股集团有限公司 选煤厂车厢清理系统及其安全装置
CN105858273B (zh) * 2016-04-22 2018-11-30 永城煤电控股集团有限公司 选煤厂车厢清理系统及其安全装置
US11199049B2 (en) * 2019-02-14 2021-12-14 Tie Down, Inc. Winch utility
CN111824704A (zh) * 2020-06-15 2020-10-27 安徽长江钢铁股份有限公司 一种紧料车钢丝绳的方法
CN111824704B (zh) * 2020-06-15 2021-10-22 安徽长江钢铁股份有限公司 一种紧料车钢丝绳的方法
CN113353763A (zh) * 2021-06-11 2021-09-07 廊坊市维璟节能科技有限公司 一种以梯子为轨道的物料提升设备

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