WO2008052438A1 - Escabeau capable de s'élever - Google Patents

Escabeau capable de s'élever Download PDF

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Publication number
WO2008052438A1
WO2008052438A1 PCT/CN2007/003095 CN2007003095W WO2008052438A1 WO 2008052438 A1 WO2008052438 A1 WO 2008052438A1 CN 2007003095 W CN2007003095 W CN 2007003095W WO 2008052438 A1 WO2008052438 A1 WO 2008052438A1
Authority
WO
WIPO (PCT)
Prior art keywords
ladder
transition
fixed
lifting
liftable
Prior art date
Application number
PCT/CN2007/003095
Other languages
English (en)
French (fr)
Inventor
Luhao Leng
Original Assignee
Luhao Leng
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
Application filed by Luhao Leng filed Critical Luhao Leng
Publication of WO2008052438A1 publication Critical patent/WO2008052438A1/zh

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Classifications

    • 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
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
    • 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
    • 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
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
    • E06C1/22—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles with extensible, e.g. telescopic, ladder parts or struts
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/06—Securing devices or hooks for parts of extensible ladders

Definitions

  • the invention relates to a freestanding ladder, in particular to a liftable ladder.
  • the early ladder has two fixed ladders and a positioning device disposed between the two fixed ladders.
  • the top ends of the two fixed ladders form a rotatable connection, and the two fixed ladders can be opened and positioned to form a ladder or fold. Position to form a ladder.
  • the herringbone ladder is widely used as a stand-alone ladder, but since the two fixed ladders cannot be adjusted in the longitudinal direction, the herringbone ladder has the following disadvantages: it can only be applied to the ground level, at the step or at the uneven level. The use of the ladder is greatly limited.
  • the ladder includes two fixed ladders and a positioning device disposed between the two fixed ladders, and the top ends of the two fixed ladders form a rotatable connection, and the two fixed ladders can be opened Positioning to form a ladder or folding position to form a ladder; wherein at least one fixed ladder can be adjusted to allow the ladder to be applied to a step or other uneven situation.
  • the ladder or the ladder ladder can be adjusted in a small range, but since the increase ladder of the solutions can only be lifted downwards to apply to the ladder At or at the ground level, but not up and down and protruding from the top of the fixed ladder, the lift is small, the adjustment range of the whole ladder or the ladder is small, and the ladder application site is limited in the twist. .
  • the invention provides a liftable ladder which not only overcomes the shortcomings of the prior art herringbone ladder which can only be applied to the ground level, but also overcomes the shortcomings of the prior art ladder twist adjustment range.
  • a liftable ladder including a fixed ladder, a transition ladder and an elevator, a fixed connection between the upper end of the fixed ladder and the upper end of the transition ladder, and the upper and lower steps of the lift and the transition ladder can be configured a sliding connection; wherein the fixed ladder and the transition ladder are openably positioned to form a ladder or folded to form a ladder, and the elevator slides relative to the transition ladder such that the top end protrudes from the top of the transition ladder or/and
  • a positioning device is disposed between the fixed ladder and the transition ladder, and includes a first connecting member and a second connecting member, one end of the first connecting member is hinged to the fixed ladder, and the second connecting member is One end is hinged to the transition ladder, and the other end of the first connecting member is hingedly connected to the other end of the second connecting member.
  • the herringbone ladder of the present invention includes a locking device that selectively locks the relative position between the elevator and the transition ladder, or locks the relative position between the fixed ladder, the elevator and the transition ladder.
  • the locking device includes a plurality of lifting holes which are arranged above and below and are evenly spaced apart from the lifting platform, a first fixing hole which is opened in the transition ladder and a handle, and the handle is locked to a certain one. Lifting hole and first fixing hole.
  • the locking device comprises a locking piece and a paddle, and the upper side of the locking piece is provided with a card slot matched with the fixed stepping pedal, and the lower portion of the card slot extends outwardly to form an abutting portion;
  • the lower part of the locking piece is rotatably connected to the fixed ladder, the card slot of the locking piece is engaged with the fixed stepping pedal and the abutting portion protrudes from the fixed ladder, and when folded into a ladder, the lower bottom surface of the lifting step is positioned against the abutting portion.
  • the locking device further includes a plurality of lifting holes arranged at an upper and lower intervals and spaced apart from each other, a first fixing hole opened in the transition ladder, and a first opening fixed in the ladder. And two fixing holes and a handle; wherein the handle can selectively lock a lifting hole and the first fixing hole or lock the first fixing hole and the second fixing hole.
  • the opening position of the second fixing hole corresponds to the pedal position of the fixed ladder; the opening positions of the lifting holes respectively correspond to the corresponding pedal positions of the elevator.
  • the length of the transition ladder is 1/4-1/2 of the length of the fixed ladder
  • the length of the elevator is 1/2-1 of the length of the fixed ladder
  • the transition ladder is provided with a sliding slot, and the lifting ladder is slidably connected to the sliding slot.
  • the side of the transition ladder adjacent to the fixed ladder is provided with a receiving groove matched to the side of the fixed ladder.
  • the technical solution has the following advantages: the elevator slides relative to the transition ladder so that the top end portion protrudes from the top end of the transition ladder or/and the bottom end portion protrudes from the bottom end of the transition ladder, which can be improved.
  • the width of the whole ladder or ladder can make the ladder work suitable for various places.
  • the locking device Optional: lock the relative position between the lift and the transition ladder when the ladder is in the adult ladder state, or, on the ladder When the ladder is in the state of the ladder, the relative position between the fixed ladder, the elevator and the transition ladder is locked; when the folding and positioning is arranged as a ladder, the card slot of the locking piece is engaged with the fixed ladder pedal and the abutting portion protrudes from the fixed ladder The lower bottom surface of the elevator pedal is positioned against the top surface of the abutting portion, so that the lifting platform can be prevented from sliding downward relative to the transition ladder, and the locking is firm; the opening positions of the lifting holes respectively correspond to the corresponding pedal positions of the lifting platform, and the second fixing The opening position of the hole corresponds to the pedal position of the fixed ladder, so that the handle and the pedal can be adjacent to each other, which can facilitate the user to step up and down the ladder; the sliding ladder is provided with a sliding slot
  • FIG. 1 is a perspective view showing the structure of a ladder of a ladder in the first embodiment of the present invention, wherein the bottom end of the step is extended from the bottom end of the transition ladder.
  • Fig. 2 is a perspective view showing the three-dimensional structure of the ladder of the ladder of the first embodiment of the present invention, wherein the top of the step ladder extends from the top of the transition ladder, and the bottom end of the elevator protrudes from the bottom end of the transition ladder.
  • Fig. 3 is a perspective view showing the three-dimensional structure of the ladder in a state in which the ladder of the first embodiment of the present invention is extended, wherein the top of the step ladder extends from the top of the transition ladder.
  • Fig. 4 is a perspective view showing the three-dimensional structure of the ladder in a state of a ladder in the first embodiment of the present invention, wherein the bottom end of the step is extended from the bottom end of the transition ladder.
  • Fig. 5 is a front elevational view showing the state of the ladder of the ladder of the first embodiment of the present invention, wherein the bottom end of the elevator extends from the bottom end of the transition ladder.
  • Fig. 6 is a front elevational view showing the state in which the ladder of the first embodiment of the present invention is in a ladder state, wherein the top end of the elevator extends from the top of the transition ladder.
  • Fig. 7 is a front elevational view showing the state in which the ladder of the first embodiment of the present invention is in a ladder state, wherein the bottom end of the elevator extends from the bottom end of the transition ladder.
  • Fig. 8 is a perspective view showing the structure of a fixed leg tube of a fixed ladder according to a first embodiment of the present invention.
  • Fig. 9 is a perspective view showing the structure of a lifting leg tube of an elevator according to a first embodiment of the present invention.
  • Figure 10 is a perspective view showing the structure of a transition leg tube of a transition ladder according to a first embodiment of the present invention.
  • Figure 11 is a horizontal cross-sectional view showing the state in which the ladder of the first embodiment of the present invention is in a ladder.
  • Figure 12 is a perspective view showing the structure of a support piece according to a first embodiment of the present invention.
  • Figure 13 is a perspective view showing the structure of a lock piece according to a first embodiment of the present invention.
  • Figure 14 is a perspective view showing the structure of the paddle of the first embodiment of the present invention.
  • Figure 15 is a perspective view showing the structure of a fixing piece according to a first embodiment of the present invention.
  • Figure 16 is a perspective view showing the structure of a handle according to a first embodiment of the present invention.
  • Fig. 17 is a cross-sectional view showing the state in which the ladder of the first embodiment of the present invention is in a ladder state, wherein the elevator pedal abuts against the abutting portion of the locking piece.
  • Fig. 18 is a cross-sectional view showing the state in which the ladder of the first embodiment of the present invention is in a ladder state, wherein the elevator pedal is opened with a paddle and the lock blade is slightly rotated outward to slide the elevator.
  • Fig. 19 is a cross-sectional view showing the state in which the ladder of the first embodiment of the present invention is in a ladder state, in which the elevator pedal is opened to unlock the locking piece and the locking piece is slightly rotated outward to slide the elevator.
  • Figure 20 is a horizontal cross-sectional view showing the state in which the ladder of the second embodiment of the present invention is in a ladder.
  • Figure 21 is a horizontal cross-sectional view showing the state in which the ladder of the third embodiment of the present invention is in a ladder.
  • Figure 22 is a horizontal cross-sectional view showing the state in which the ladder of the fourth embodiment of the present invention is in a ladder.
  • Figure 23 is a horizontal cross-sectional view showing the state in which the ladder of the fifth embodiment of the present invention is in a ladder.
  • Figure 24 is a horizontal cross-sectional view showing the state in which the ladder of the sixth embodiment of the present invention is in a ladder.
  • Figure 25 is a horizontal cross-sectional view showing the state in which the ladder of the seventh embodiment of the present invention is in a ladder.
  • Figure 26 is a perspective view showing the three-dimensional structure of the ladder of the ladder of the eighth embodiment of the present invention, wherein the bottom end of the elevator extends from the bottom end of the transition ladder.
  • Figure 27 is a perspective view showing the three-dimensional structure of the ladder in a state in which the ladder of the eighth embodiment of the present invention is extended, wherein the bottom end of the elevator extends from the bottom end of the transition ladder.
  • Figure 28 is a perspective view showing the three-dimensional structure of the ladder in a state in which the ladder of the eighth embodiment of the present invention is extended, wherein the top of the elevator extends from the top of the transition ladder.
  • Fig. 29 is a perspective view showing the three-dimensional structure of the ladder of the ladder of the eighth embodiment of the present invention, wherein the top of the elevator protrudes from the top of the transition ladder.
  • a liftable ladder as shown in Figures 1, 2, 3, 4, 5, 6, and 7, including a fixed ladder 1, a transition ladder 2, and a lift 3, between the upper end of the fixed ladder 1 and the upper end of the transition ladder 2
  • the rotatably connected structure is formed, and the lift 2 and the transition ladder 3 form a vertically slidable connection.
  • the length of the transition ladder 2 is approximately the length of the fixed ladder 1 1/3 of the length of the lift 3 is approximately equal to the length of the fixed ladder 1.
  • the fixed ladder 1 includes two fixed leg tubes 11 arranged in parallel and a plurality of pedals 12 fixed between the two fixed leg tubes 11, and the plurality of pedals 12 are horizontally disposed;
  • the fixed leg tube 11 has a horizontal cross section of an R-shape.
  • a plurality of second fixing holes 13 are defined in the fixed ladder 1 , and the second fixing holes 13 are spaced apart from each other and the axis is horizontal. Each of the second fixing holes 13 extends through the two fixed leg tubes 11 and a pedal 12 . center.
  • a support piece 14 is disposed on the inner side of the fixed leg tube 11.
  • the support piece 14 has a zigzag shape and includes an intermediate piece 141 and two side pieces 142, wherein the one side piece 142
  • the fixed side is attached to the inner side of the fixed leg tube 11, and the other side piece 142 is connected to the fixed leg tube 11 by a pivot.
  • a locking piece 15 is also pivotally mounted on the pivot, and a lower portion of the locking piece 15 is sandwiched between the other side piece 142 and the fixed leg tube 11. As shown in FIG. 1 and FIG.
  • a locking groove 151 is defined in a side surface of the locking piece 15 , and a portion inside the locking groove 151 is matched with the pedal 12 .
  • the upper portion of the locking groove 151 is formed into a hook shape 152 , and a lower portion of the locking groove 151 extends outwardly to abut the abutting portion 153 .
  • the top surface of the abutting portion 153 abuts against the plane 155 and the bottom surface is a slope 154.
  • the lower portion of the locking piece 15 is rotatably connected to the fixed leg tube of the fixed ladder.
  • the locking groove 151 of the locking piece 15 is engaged with the pedal 12 of the fixed ladder 1 and the abutting portion 153 protrudes from the fixed ladder 1.
  • a paddle 16 is pivotally connected to the end portion of the hook 152.
  • the paddle 16 can be used to close the card slot 151, and the paddle 16 and the hook 152 are provided with a limiting structure so as to have a maximum angle of rotation therebetween.
  • a handle portion 17 is recessed outside the fixed leg tube 11.
  • the transition ladder 2 includes two parallel transition leg tubes 21 and a fixing rod fixed between the two transition leg tubes, and no pedal is disposed therein; as shown in FIG.
  • the transition leg tube 21 has a receiving groove 22 that is matched to the opening of the R-shaped fixed leg tube 11 on the left side, and a chute 23 with a large abdomen on the right side.
  • a first fixing hole 211 is defined in the transition leg tube 21, and the first fixing hole 211 penetrates the sliding slot 23 and the first fixing hole 211 is horizontally lined.
  • the outer side of the transition leg tube 21 is fixed with a fixing piece 24, which partially protrudes from the right side surface of the transition leg tube 21.
  • the fixing piece 24 is provided with a first through hole 241 and a second through hole 242.
  • the first through hole 241 and the first fixing hole 211 are coaxial and have the same diameter, and the second through hole 242 is located at the protruding portion of the fixing piece 24.
  • the top ends of the two transition leg tubes 21 are respectively pivotally connected to the top ends of the two fixed leg tubes 11, so that the upper end of the fixed ladder 1 and the upper end of the transition ladder 2 are connected.
  • a positioning device is further connected between the transition leg tube 21 and the fixed leg tube 11, and includes a first connecting member 41 and a Two connecting members 42, one end of the first connecting member 41 is hinged to the fixed leg tube 11, one end of the second connecting member 42 is hinged to the transition leg tube 21, the other end of the first connecting member 41 and the other end of the second connecting member 42 An articulated connection; such that the transition leg tube 21, the fixed leg tube 11, the first connector 41 and the second connector 42 form a foldable four-bar assembly.
  • the relative deployment position between the fixed ladder 1 and the transition ladder 2 can be located by the positioning device; when the fixed ladder 1 and the transition ladder 2 are folded into a ladder, the R-shaped fixed The opening portion of the leg tube 11 is located in the accommodating groove 22 on the left side of the transition leg tube 21 to reduce the occupied space after folding.
  • the elevator 3 includes two parallel lift leg tubes 31 and a plurality of pedals 32 fixed between the two lift leg tubes 31.
  • the plurality of pedals 32 7j are disposed flat.
  • the elevating leg tube 31 is of a square shape, and the left and right front sides are recessed so that the left side of the elevating leg tube 31 forms a slide rail 33 matching the chute 23.
  • a plurality of lifting holes 34 are defined in the lifting platform 3, and the lifting holes 34 are spaced apart from each other and the axis is horizontal.
  • Each lifting hole 34 extends through the center of the two lifting leg tubes 31 and a pedal 32, and the lifting hole The position of 34 corresponds to the second through hole 242 of the fixing piece 24 and is equal in diameter.
  • the sliding rail 33 of the lifting leg tube 31 is slidably disposed in the sliding slot 23 of the transition leg tube 21, so that the lifting leg tube 31 can be relatively transitioned.
  • the leg tube 21 slides, and the elevator 3 slides relative to the transition ladder 2 such that its top end protrudes from the top end of the transition ladder 2 or its bottom end protrudes from the bottom end of the transition ladder 2.
  • the locking device has the following functions: First, the fixed ladder 1 and the transition ladder 2 adult ladder are deployed, and the locking device can lock the relative position between the lifting leg tube 31 and the transition leg tube 21 to prevent the lifting leg
  • the relative sliding between the tube 31 and the transition leg tube 21 is also the relative position of the lock transition ladder 2 and the lift 3, and the lift leg tube 31 can be slid by loosening the lock; second, the fixed ladder 1 and the transition ladder are folded
  • the locking device can lock the relative position between the fixed leg tube 11, the lifting leg tube 31 and the transition leg tube 21, or lock the relative position between the fixed leg tube 11 and the transition leg tube 21, In order to prevent the fixed ladder 1 and the transition ladder 2 from being unfolded, to prevent relative sliding between the lifting leg tube 31 and the transition leg tube 21 or to prevent the lifting leg tube 31 from sliding downward relative to the transition leg tube 21, releasing the locking to slide and lift The leg tube 31 or the adult word ladder.
  • the locking device includes two handles 5 in addition to the lifting hole, the first fixing hole, the second fixing hole, the locking piece and the paddle, and the handle 5 includes a handle 51.
  • Fixed column 52 Fixed column 52.
  • a latch 53, the tail portion and the middle portion of the working side of the handle 51 respectively protrude outwardly into a first connecting portion and a second connecting portion, and the latch 53 and the fixing post 52 are respectively fixed to the two first connecting portions and the second connecting portion
  • the structure allows the user to lock or release the lock.
  • the length of the fixing post 52 is equal to one-half of the length of the pedal 12, the fixing post 52 is matched with the first fixing hole 211, and the latch 53 is matched with the second fixing hole 13 and the lifting hole 34.
  • the fixing post 52 and the latch 53 have different lengths, and when the locking is released, it is not necessary to pull out the handle completely to completely disengage the ladder, thereby preventing the handle from being lost and also facilitating the locking and releasing.
  • the fixed ladder 1 and the transition ladder 2 adult ladder are deployed, and the deployment angle of the ladder is positioned by the positioning device; the elevator 3 is slid to match the step or the unevenness, and is adjusted.
  • the relative positions of the elevator 3 and the transition ladder 2 are respectively moved; the two handles 5 are moved toward each other, and the fixing post 52 of the handle 5 passes through the first through hole 241 of the fixing piece 24 and the first fixing hole 211 of the transition ladder 2, and the pin 53 is worn.
  • the second through hole 242 of the fixing piece 24 and one of the lifting holes 34 of the lift 3 are engaged to lock the lift 3 and the transition ladder 2.
  • the fixed ladder 1 and the transition ladder 2 are formed into a ladder, and the two handles 5 are respectively moved toward each other.
  • the fixing post 52 of the handle 5 passes through the first through hole 241 of the fixing piece 24 and transitions.
  • the first fixing hole 211 of the ladder 2 passes through the second fixing hole 13 of the fixed leg tube 11 to lock the fixed ladder 1 and the transition ladder 2.
  • the locking groove 151 of the locking piece 15 is engaged and abuts against the fixed ladder 1
  • the pedal 12 is simultaneously extended from the fixed ladder 1 by the abutting portion 153; the lower bottom surface of the pedal 3 of the lift 3 is positioned against the abutment plane 155 of the abutting portion 153 to prevent the lift 3 from sliding downward. Then the paddle 16 naturally falls and closes the card slot 151.
  • the fixed leg tube 11 has a horizontal cross section of an R-shape; the transition leg tube 21 has the same structure and a fixed leg tube 11 as the horizontal structure.
  • the cross section is also R-shaped, and the open end of the R-shaped transition leg tube 21 is formed as a chute 23; 31 is a type of mouth shape, and the lifting leg tube 31 is a slide rail.
  • the lift leg tube 31 is slidably coupled to the chute 23.
  • the first embodiment differs from the first embodiment in that: as shown in FIG. 21, the fixed leg tube 11 has a horizontal cross section in a mouth shape; the transition leg tube 21 7J flat cross section includes a mouth portion and a U word. a portion, wherein the side of the mouth portion and the side of the U-shaped portion coincide, the opening of the U-shaped portion is inwardly constricted so that the U-shaped portion is formed into a chute 23; the lifting leg tube 31 is in the form of a mouth-shaped shape.
  • the lifting leg tube 31 is a slide rail.
  • the lift leg tube 31 is slidably coupled to the chute 23.
  • the fixed leg tube 11 has a horizontal cross section in a square shape;
  • the horizontal cross section of the transition leg tube 21 includes a mouth portion and a U-shaped portion. Wherein the side of the mouth portion and the side of the U-shaped portion coincide, the opening of the U-shaped portion is inwardly retracted so that the U-shaped portion is formed into a chute 23;
  • the horizontal cross-section of the lifting leg tube 31 includes a mouth word The portion and the inverted U-shaped portion, wherein the side of the mouth portion and the side of the inverted U-shaped portion coincide, and the opening of the inverted U-shaped portion is shrunk so that the inverted U-shaped portion is formed into the guide rail 33.
  • the guide rail 33 is slidably coupled to the chute 23.
  • the fixed leg tube 11 has a horizontal cross section in a side U-shape.
  • the horizontal cross section of the transition leg tube 21 includes a mouth portion and an inverted U-shaped portion, wherein a side of the mouth portion and a side of the inverted U-shaped portion coincide, and the inverted U-shaped portion is inwardly constricted so that the The inverted U-shaped portion is formed into a chute 23; the side U-shape of the fixed leg tube 11 is matched with the mouth portion of the transition leg tube 21, and the mouth portion of the transition leg tube 21 is located on the side of the fixed leg tube 11 when folded into a ladder Inside the U shape.
  • the lifting leg tube 31 has a horizontal cross section in a side L-shape, and the short portion of the L-shaped lifting leg tube 31 is a guide rail 33.
  • the guide rail 33 is slidably coupled to the chute 23.
  • the fixed leg tube 11 has a horizontal cross section in a square shape.
  • the horizontal cross section of the transition leg tube 21 includes a side U portion, a mouth portion and a U-shaped portion, wherein the right side of the side U portion and the left side of the mouth portion overlap, and the right side of the mouth portion and the U-shaped portion The left side overlaps, the U-shaped opening is inwardly contracted so that the U-shaped portion is formed into the chute 23; the right portion of the fixed leg tube 11 is matched to the side U portion of the transition leg tube 21.
  • the horizontal cross section of the lifting leg tube 31 includes a mouth portion and an inverted U-shaped portion, wherein the side of the mouth portion and the side of the inverted U-shaped portion coincide, and the opening of the inverted U-shaped portion is shrunk so as to be inverted
  • the U-shaped portion is formed as a guide rail 33.
  • the guide rail 33 is slidably coupled to the chute 23.
  • the fixed leg tube 11 has a horizontal cross section of a side L-shape.
  • the horizontal cross section of the transition leg tube 21 is also formed into a side L-shape, and the L-shaped short side of the transition leg tube 21 forms an inward groove into the chute 23.
  • the flat leg cross-section of the lifting leg tube 31 7 is also formed in a side L shape, and the L-shaped side of the lifting leg tube 31 and the L-shaped side of the transition leg tube 21 face each other, and the L-shaped short side of the lifting leg tube 31 is a guide rail 33.
  • the guide rail 33 is slidably coupled to the chute 23.
  • the utility model relates to a liftable ladder which comprises a fixed ladder, a transition ladder and a lift.
  • the upper end of the fixed ladder and the upper end of the transition ladder form a rotatable connection, and the lift and the transition ladder form a vertical sliding connection; wherein, the fixed The ladder and the transition ladder can be positioned to form a ladder or folded to form a ladder, and the elevator slides relative to the transition ladder so that the top end protrudes from the top of the transition ladder or/and the bottom end thereof extends Out of the bottom of the transition ladder.
  • the height of the whole ladder or the ladder can be raised, so that the ladder can be applied to various places. Even if the ground is uneven or stepped, the ladder has various adjustment functions and a large range of ladder adjustment. Wide range of applications, with good industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Description

一种可升降人字梯 技术领域
本发明涉及一种独立式梯子， 特别是涉及一种可升降人字梯。
背景技术
早期的人字梯包括两固定梯及一设于两固定梯之间的定位装置，该两固定 梯顶端之间构成可转动连接，两固定梯之间可张开定位以形成人字梯或折合定位 以形成一字梯。该人字梯为独立式梯子应用广泛，但由于两固定梯在长度方向均 不能调整则使得该人字梯子存在有如下的缺点：只能应用于地面齐平场所，在阶 梯处或髙低不平处该人字梯的使用就受到极大的限制。
针对上述的缺点有人提出了解决方法：人字梯包括两固定梯及一设于两固 定梯之间的定位装置，该两固定梯顶端之间构成可转动连接，两固定梯之间可张 开定位以形成人字梯或折合定位以形成一字梯；其中，至少有一固定梯髙度可调 整以使得该人字梯可应用于阶梯处或其他不平场合。如中国专利数据库所介绍的
03274778,其中一固定梯下端部还折合联接有增髙梯，张该增髙梯可增高固定梯 髙度； 如中国专利数据库多介绍的 96237633, 其中一固定梯下端内设有可向下 伸缩的增高梯； 如中国专利数据库所介绍的 200320122477, 其中两固定梯下端 内均设有可向下伸缩的增高梯。该几个解决方案虽然都解决了使用场所受地面限 制的缺点，可以小范围内调整人字梯或一字梯髙度，但是由于该些解决方案的增 高梯只能向下升降以应用于阶梯处或地面不平处，而不能向上升降并伸出于固定 梯顶端，则使得升降髙度小，整个人字梯或一字梯的髙度调整范围小， 梯子应用 场所在髙度上受到一定限制。
发明内容
本发明提供一种可升降人字梯,其不但克服了现有技术的人字梯子只能应 用于地面齐平场所的缺点也克服了现有技术的梯子髙度调整范围小的缺点。
本发明的目的这样实现的： 一种可升降人字梯，包括固定梯、过渡梯和升 降梯， 固定梯上端和过渡梯上端之间构成可转动连接，升降梯和过渡梯之间构成 可上下滑动连接；其中，固定梯和过渡梯之间可张开定位以形成人字梯或折合定 位以形成一字梯， 升降梯相对过渡梯滑动以使其顶端部伸出于过渡梯顶端或 /和
1
确认本 ' 使其底端部伸出于过渡梯底端。
本发明的人字梯，所述的固定梯和过渡梯之间设置有定位装置，其包括第 一连接件和第二连接件，第一连接件的一端铰接于固定梯，第二连接件的一端铰 接于过渡梯， 第一连接件的另一端和第二连接件的另一端铰接连接。
本发明的人字梯，包括有锁接装置，其可选择锁接升降梯和过渡梯之间的 相对位置， 或， 锁接固定梯、 升降梯和过渡梯之间的相对位置。
本发明的人字梯，所述的锁接装置包括若干个上下排列并均匀间隔地开设 于升降梯的升降孔、一开设于过渡梯的第一固定孔及一拉手，该拉手锁接某一升 降孔及第一固定孔。
本发明的人字梯，所述的锁接装置包括一锁片和一拨片，锁片上部侧面开 设有匹配于固定梯踏板的卡槽， 该卡槽下部向外延伸成抵靠部； 其中，锁片下部 可转动连接于固定梯，锁片的卡槽卡接于固定梯踏板且抵靠部伸出于固定梯，折 合成一字梯时， 升降梯踏板下底面定位抵靠抵靠部。
本发明的人字梯，所述的锁接装置还包括若干个上下排列并均勾间隔地开 设于升降梯的升降孔、一开设于过渡梯的第一固定孔、一开设于固定梯的第二固 定孔及一拉手；其中，该拉手可选择锁接某一升降孔和第一固定孔或锁接第一固 定孔和第二固定孔。
本发明的人字梯，第二固定孔的开设位置对应于固定梯的踏板位置；各升 降孔的开设位置分别对应于升降梯的对应踏板位置。
本发明的人字梯， 所述的过渡梯长度为固定梯长度的 1/4-1/2， 升降梯长 度为固定梯长度的 1/2-1。
本发明的人字梯， 所述的过渡梯上开设有滑槽， 升降梯滑动连接于滑槽。 本发明的人字梯，所述的过渡梯的靠近于固定梯的侧面上开设有匹配于固 定梯侧部的容置槽。
本技术方案和背景技术相比，具有如下的优点：升降梯相对过渡梯滑动以 使其顶端部伸出于过渡梯顶端或 /和使其底端部伸出于过渡梯底端， 可提髙整个 人字梯或一字梯的髙度,可使得人字梯适用于各种场所即使该场所地面不平或为 阶梯，本梯子的升降梯调整功能多样化而且梯子高度调整范围大；锁接装置可选 择：在梯子成人字梯状态时锁接升降梯和过渡梯之间的相对位置，或，在梯子 一字梯状态时锁接固定梯、升降梯和过渡梯之间的相对位置；折合并定位成一字 梯时， 由于锁片的卡槽卡接于固定梯踏板且抵靠部伸出于固定梯，升降梯踏板下 底面定位抵靠抵靠部顶面， 则可防止升降梯相对过渡梯向下滑动，锁接牢固； 各 升降孔的开设位置分别对应于升降梯的对应踏板位置，第二固定孔的开设位置对 应于固定梯的踏板位置，使得拉手和踏板可相邻靠，可便于用户上下梯子； 过渡 梯上开设有滑槽， 升降梯滑动连接于滑槽， 滑动方便， 调整方便， 锁接后牢固； 固定梯的靠近于过渡梯的侧面上开设有匹配于过渡梯侧部的容置槽，折合成一字 梯后， 占用空间小， 搬运收藏方便。
附图说明
下面结合附图和实施例对本发明进一步说明。
图 1是本发明实施例一的梯子成人字梯状态的立体结构示意图，其中，升 降梯底端伸出于过渡梯底端。
图 2是本发明实施例一的梯子成人字梯状态的立体结构示意图，其中，升 降梯顶端伸出于过渡梯顶端， 而且升降梯底端伸出于过渡梯底端。
图 3是本发明实施例一的梯子成一字梯状态的立体结构示意图，其中，升 降梯顶端伸出于过渡梯顶端。
图 4是本发明实施例一的梯子成一字梯状态的立体结构示意图，其中，升 降梯底端伸出于过渡梯底端。
图 5是本发明实施例一的梯子成人字梯状态的主视示意图，其中，升降梯 底端伸出于过渡梯底端。
图 6是本发明实施例一的梯子成一字梯状态的主视示意图，其中，升降梯 顶端伸出于过渡梯顶端。
图 7是本发明实施例一的梯子成一字梯状态的主视示意图，其中，升降梯 底端伸出于过渡梯底端。
图 8是本发明实施例一的固定梯的固定腿管的立体结构示意图。
图 9是本发明实施例一的升降梯的升降腿管的立体结构示意图。
图 10是本发明实施例一的过渡梯的过渡腿管的立体结构示意图。
图 11是本发明实施例一的梯子成一字梯状态的水平剖面示意图。
图 12是本发明实施例一的支撑片的立体结构示意图。 图 13是本发明实施例一的锁片的立体结构示意图。
图 14是本发明实施例一的拨片的立体结构示意图。
图 15是本发明实施例一的固定片的立体结构示意图。
图 16是本发明实施例一的拉手的立体结构示意图。
图 17是本发明实施例一的梯子成一字梯状态的剖面示意图， 其中， 升降 梯踏板靠接于锁接片的抵靠部。
图 18是本发明实施例一的梯子成一字梯状态的剖面示意图， 其中， 升降 梯踏板顶开拨片并带动锁片稍微向外转动以滑动升降梯。
图 19是本发明实施例一的梯子成一字梯状态的剖面示意图， 其中， 升降 梯踏板顶开锁片并带动锁片稍微向外转动以滑动升降梯。
图 20是本发明实施例二的梯子成一字梯状态的水平剖面示意图。
图 21是本发明实施例三的梯子成一字梯状态的水平剖面示意图。
图 22是本发明实施例四的梯子成一字梯状态的水平剖面示意图。
图 23是本发明实施例五的梯子成一字梯状态的水平剖面示意图。
图 24是本发明实施例六的梯子成一字梯状态的水平剖面示意图。
图 25是本发明实施例七的梯子成一字梯状态的水平剖面示意图。
图 26是本发明实施例八的梯子成人字梯状态的立体结构示意图， 其中， 升降梯底端伸出于过渡梯底端。
图 27是本发明实施例八的梯子成一字梯状态的立体结构示意图， 其中， 升降梯底端伸出于过渡梯底端。
图 28是本发明实施例八的梯子成一字梯状态的立体结构示意图， 其中， 升降梯顶端伸出于过渡梯顶端。
图 29是本发明实施例八的梯子成人字梯状态的立体结构示意图， 其中， 升降梯顶端伸出于过渡梯顶端。
具体实施方式
实施例一
一种可升降人字梯， 如图 1、 2、 3、 4、 5、 6、 7所示， 包括固定梯 1、 过 渡梯 2和升降梯 3， 固定梯 1上端和过渡梯 2上端之间构成可转动连接， 升降梯 2和过渡梯 3之间构成可上下滑动连接。其中， 过渡梯 2长度约为固定梯 1长度 的 1/3, 升降梯 3长度约等于固定梯 1长度。
如图 1、 8所示，固定梯 1包括两平行设置的固定腿管 11及若干个固定于 两固定腿管 11之间的踏板 12， 该些若干个踏板 12水平设置； 如图 11所示， 所 述的固定腿管 11水平横截面成类 R字形。 固定梯 1上开设有若干个第二固定孔 13， 该些第二固定孔 13上下均勾间隔而且轴线成水平线， 其中， 每个第二固定 孔 13均贯穿两固定腿管 11及一踏板 12中心。
如图 1所示， 固定腿管 11内侧设有支撑片 14， 如图 1、 12所示， 该支撑 片 14成 Z字形并包括一中间片 141及两侧片 142， 其中， 一侧片 142固定贴接 于固定腿管 11内侧， 另一侧片 142通过一枢轴连接在固定腿管 11。枢轴上还枢 接有锁片 15, 锁片 15下部夹于另一侧片 142和固定腿管 11之间。 如图 1、 13 所示， 锁片 15侧面开设有卡槽 151, 卡槽 151内部的部分吻合于踏板 12; 卡槽 151上部成钩形 152， 卡槽 151下部向外延伸成抵靠部 153, 抵靠部 153顶面成 抵靠平面 155且底面成斜面 154。 锁片 15下部可转动连接于固定梯的固定腿管 11,锁片 15的卡槽 151卡接于固定梯 1的踏板 12且抵靠部 153伸出于固定梯 1。 该钩形 152末端部处枢接有拨片 16, 拨片 16可用于封闭该卡槽 151, 而且拨片 16和钩形 152之间配有限位结构以使得其之间具有最大转动角度。 为了便于用 户携带、 搬运本梯子， 在一个固定腿管 11外侧凹设有提手部 17。
如图 1、 10所示， 过渡梯 2包括两平行设置的过渡腿管 21及固接于两过 渡腿管之间的固定杆， 其内并未设置有踏板； 如图 11所示， 所述的过渡腿管 21 左侧设有匹配于 R字形固定腿管 11的开口部的容置槽 22，右侧设有口小腹大的 滑槽 23。 过渡腿管 21上开设有一第一固定孔 211， 该第一固定孔 211贯穿滑槽 23而且第一固定孔 211轴线成水平线。
如图 1、 15所示， 过渡腿管 21外侧面固定有固定片 24, 其部分伸出过渡 腿管 21右侧面； 固定片 24上开设有第一通孔 241和第二通孔 242， 其中， 第一 通孔 241和第一固定孔 211同轴而且同径， 第二通孔 242位于固定片 24的伸出 部分。
如图 1、 2、 3、 4、 5、 6、 7所示， 上述的两个过渡腿管 21顶端分别枢接 于两固定腿管 11顶端，使得固定梯 1上端和过渡梯 2上端之间构成可转动连接。 过渡腿管 21和固定腿管 11之间还连接有定位装置， 其包括第一连接件 41和第 二连接件 42, 第一连接件 41的一端铰接于固定腿管 11， 第二连接件 42的一端 铰接于过渡腿管 21， 第一连接件 41的另一端和第二连接件 42的另一端铰接连 接； 使得过渡腿管 21、 固定腿管 11、 第一连接件 41和第二连接件 42之间构成 可折叠的四杆件组件。当展开固定梯 1和过渡梯 2成人字梯时，通过本定位装置 可定位固定梯 1和过渡梯 2之间的相对展开位置；折合固定梯 1和过渡梯 2成一 字梯时， R字形固定腿管 11的开口部位于过渡腿管 21左侧容置槽 22内以减少 折合后占用空间。
如图 1、 9所示，升降梯 3包括两平行设置的升降腿管 31及若干个固定于 两升降腿管 31之间的踏板 32， 该些若干个踏板 32 7j平设置。 如图 11所示， 所 述的升降腿管 31成类口字形，而且左部前后侧面内凹以使得升降腿管 31左部形 成匹配于滑槽 23的滑轨 33。 升降梯 3上开设有若干个升降孔 34， 该些升降孔 34上下均勾间隔而且轴线成水平线，其中，每个升降孔 34均贯穿两升降腿管 31 及一踏板 32中心， 而且该升降孔 34所处位置和固定片 24的第二通孔 242相对 应， 且直径相等。
如图 1、 2、 3、 4、 5、 6、 7所示， 上述的升降腿管 31的滑轨 33可滑动设 置于过渡腿管 21的滑槽 23内，使得升降腿管 31可相对过渡腿管 21滑动，也既 是升降梯 3相对过渡梯 2滑动以使其顶端部伸出于过渡梯 2顶端或使其底端部伸 出于过渡梯 2底端。 当然了也需要设置限位装置以防止升降腿管 31脱离于过渡 腿管 21。
另配有锁接装置具有以下功能:其一,展开固定梯 1和过渡梯 2成人字梯， 锁接装置可锁接升降腿管 31和过渡腿管 21之间的相对位置， 以防止升降腿管 31和过渡腿管 21之间相对滑动， 也既是锁接过渡梯 2和升降梯 3的相对位置， 松释该锁接即可滑动升降腿管 31; 其二， 折合固定梯 1和过渡梯 2成一字梯， 锁接装置可锁接固定腿管 11、升降腿管 31和过渡腿管 21之间的相对位置， 或， 锁接固定腿管 11和过渡腿管 21之间的相对位置， 以防止固定梯 1和过渡梯 2 展开， 以防止升降腿管 31和过渡腿管 21之间相对滑动或防止升降腿管 31相对 过渡腿管 21向下滑动， 松释该锁接即可滑动升降腿管 31或展开成人字梯。
本实施例中， 如图 16所示， 锁接装置除了上述的升降孔、 第一固定孔、 第二固定孔、锁片、拨片外还包括两个拉手 5， 拉手 5包括一手柄 51、一固定柱 52、一插销 53， 手柄 51工作侧面的尾部和中部分别向外凸出成第一连接部和第 二连接部，该插销 53和固定柱 52分别固接于两第一连接部和第二连接部，该种 结构可便于用户锁接或松释该锁接。固定柱 52长度等于踏板 12长度的二分之一， 固定柱 52匹配于第一固定孔 211, 插销 53匹配于第二固定孔 13、 升降孔 34。 其中，固定柱 52和插销 53长度不等，松释该锁接时无需全部拔出拉手使其完全 脱离人字梯， 则可防止该拉手丢失而且还便于锁接和松释。
下面结合使用例子具体说明本梯子的使用方法：
如图 1、 2、 5所示， 展开固定梯 1和过渡梯 2成人字梯， 该人字梯的展开 角度通过定位装置定位；滑动升降梯 3以使其匹配于阶梯处或不平处，调整好升 降梯 3和过渡梯 2的相对位置； 两拉手 5分别相向移动， 拉手 5的固定柱 52穿 过固定片 24的第一通孔 241和过渡梯 2的第一固定孔 211，插销 53穿过固定片 24的第二通孔 242和升降梯 3的某一个升降孔 34, 以锁接升降梯 3和过渡梯 2。
如图 3、 4、 6、 7所示， 折合固定梯 1和过渡梯 2成一字梯， 两拉手 5分 别相向移动，拉手 5的固定柱 52穿过固定片 24的第一通孔 241和过渡梯 2的第 一固定孔 211，插销 53穿过固定腿管 11的第二固定孔 13， 以锁接固定梯 1和过 渡梯 2。 滑动升降梯 3以调整一字梯髙度： 如图 18所示， 当升降梯 3向上滑动 时，踏板 32顶开拨片 16， 拨片 16转动到最大角度后，踏板 32就会通过拨片 16 带动锁片 15向外稍微转动使得抵靠部 153向固定梯 1内活动， 以供用户升起升 降梯 3; 或， 如图 19所示， 当当升降梯 3向上滑动时， 踏板 32顶在锁片 15的 斜面 154,踏板 32就会带动锁片 15向外稍微转动使得抵靠部 153向固定梯 1内 活动， 以供用户升起升降梯 3； 向下滑动时候， 需要用户手动向外转动锁片 15 以供用户升起升降梯 3; 调整好升降梯 3和过渡梯 2的相对位置后， 如图 17所 示， 锁片 15的卡槽 151卡接并抵靠于固定梯 1的踏板 12， 同时抵靠部 153伸出 于固定梯 1;升降梯 3踏板 32下底面定位抵靠抵靠部 153的抵靠平面 155, 以防 止升降梯 3向下滑动。 然后拨片 16自然落下并封闭该卡槽 151。
实施例二
本实施例和实施例一不同之处在于：如图 20所示，所述的固定腿管 11水 平横截面成类 R字形；所述的过渡腿管 21结构和固定腿管 11结构相同，水平横 截面也为类 R字形， 该 R字形过渡腿管 21的开口端成滑槽 23; 所述的升降腿管 31成类口字形， 该升降腿管 31成滑轨。 升降腿管 31滑动连接于滑槽 23内。 实施例三
本实施例和实施例一不同之处在于：如图 21所示，所述的固定腿管 11水 平横截面成口字形； 所述的过渡腿管 21 7J平横截面包括口字部和 U字部， 其中 口字部侧边和 U字部的侧边重合，该 U字部开口向内缩口， 以使该 U字部内成滑 槽 23; 所述的升降腿管 31成类口字形， 该升降腿管 31成滑轨。 升降腿管 31滑 动连接于滑槽 23内。
实施例四
本实施例和实施例一不同之处在于：如图 22所示，所述的固定腿管 11水 平横截面成口字形； 所述的过渡腿管 21水平横截面包括口字部和 U字部， 其中 口字部侧边和 U字部的侧边重合，该 U字部开口向内缩口， 以使该 U字部内成滑 槽 23; 所述的升降腿管 31水平横截面包括口字部和倒 U字部， 其中口字部侧边 和倒 U字部的侧边重合， 倒 U字部开口处缩口， 以使得倒 U字部成导轨 33。 导 轨 33滑动连接于滑槽 23内。
实施例五
本实施例和实施例一不同之处在于：如图 23所示，所述的固定腿管 11水 平横截面成侧 U字形。 所述的过渡腿管 21水平横截面包括口字部和倒 U字部， 其中口字部侧边和倒 U字部的侧边重合， 该倒 U字部开口向内缩口， 以使该倒 U 字部内成滑槽 23; 固定腿管 11的侧 U字形和过渡腿管 21的口字部相匹配， 折 合成一字梯时过渡腿管 21的口字部位于固定腿管 11的侧 U字形内。所述的升降 腿管 31水平横截面成侧 L字形， L字形升降腿管 31的短部成导轨 33。 导轨 33 滑动连接于滑槽 23内。
实施例六
本实施例和实施例一不同之处在于：如图 24所示，所述的固定腿管 11水 平横截面成口字形。 所述的过渡腿管 21水平横截面包括侧 U部、 口字部和 U字 部，其中侧 U部右侧边和口字部的左侧边重合， 口字部右侧边和 U字部左侧边重 合， 该 U字部开口向内缩口， 以使该 U字部内成滑槽 23; 固定腿管 11的右部匹 配于过渡腿管 21的侧 U部。 所述的升降腿管 31水平横截面包括口字部和倒 U 字部，其中口字部侧边和倒 U字部的侧边重合，倒 U字部开口处缩口， 以使得倒 U字部成导轨 33。 导轨 33滑动连接于滑槽 23内。
实施例七
本实施例和实施例一不同之处在于：如图 25所示，所述的固定腿管 11水 平横截面成侧 L字形。 所述的过渡腿管 21水平横截面也成侧 L字形， 过渡腿管 21侧 L字形短边向内缩口形成滑槽 23。所述的升降腿管 31 7平横截面也成侧 L 字形， 升降腿管 31侧 L字形和过渡腿管 21侧 L字形相向， 该升降腿管 31侧 L 字形短边成导轨 33。 导轨 33滑动连接于滑槽 23内。
实施例八
本实施例和实施例一不同之处在于： 如图 26、 27、 28、 29所示， 所述的 两固定腿管 11并未平行设置，该两固定腿管 11之间的间距上小下大， 以增加稳 定性。
以上所述,仅为本发明较佳实施例而已，故不能以此限定本发明实施的范围， 即依本发明申请专利范围及说明书内容所作的等效变化与修饰，皆应仍属本发明 专利涵盖的范围内。
工业实用性
本发明一种可升降人字梯：包括固定梯、过渡梯和升降梯， 固定梯上端和过 渡梯上端之间构成可转动连接，升降梯和过渡梯之间构成可上下滑动连接;其中， 固定梯和过渡梯之间可张开定位以形成人字梯或折合定位以形成一字梯，升降梯 相对过渡梯滑动以使其顶端部伸出于过渡梯顶端或 /和使其底端部伸出于过渡梯 底端。可提髙整个人字梯或一字梯的高度，可使得人字梯适用于各种场所即使该 场所地面不平或为阶梯，本梯子的升降梯调整功能多样化而且梯子髙度调整范围 大。 适用范围广， 具有良好的工业实用性。

Claims

1. 一种可升降人字梯， 其特征是： 包括固定梯、 过渡梯和升降梯， 固定 梯上端和过渡梯上端之间构成可转动连接，升降梯和过渡梯之间构成可上下滑 动连接；其中， 固定梯和过渡梯之间可张开定位以形成人字梯或折合定位以形 成一字梯， 升降梯相对过渡梯滑动以使其顶端部伸出于过渡梯顶端或 /和使其 底端部伸出于过渡梯底端。
2. 根据权利要求 1所述的一种可升降人字梯， 其特征是： 所述的固定梯 和过渡梯之间设置有定位装置，其包括第一连接件和第二连接件，第一连接件 的一端铰接于固定梯，第二连接件的一端铰接于过渡梯，第一连接件的另一端 和第二连接件的另一端铰接连接。
.
3. 根据权利要求 1或 2所述的一种可升降人字梯， 其特征是： 还包括有 锁接装置， 其可选择锁接升降梯和过渡梯之间的相对位置， 或， 锁接固定梯、 升降梯和过渡梯之间的相对位置。
4. 根据权利要求 3所述的一种可升降人字梯， 其特征是： 所述的锁接装 置包括若干个上下排列并均匀间隔地开设于升降梯的升降孔、一开设于过渡梯 的第一固定孔及一拉手， 该拉手锁接某一升降孔及第一固定孔。
5. 根据权利要求 3所述的一种可升降人字梯， 其特征是： 所述的锁接装 置包括一锁片和一拨片， 锁片上部侧面开设有匹配于固定梯踏板的卡槽， 该卡 槽下部向外延伸成抵靠部； 其中， 锁片下部可转动连接于固定梯， 锁片的卡槽 卡接于固定梯踏板且抵靠部伸出于固定梯，折合成一字梯时，升降梯踏板下底 面定位抵靠抵靠部。
6. 根据权利要求 5所述的一种可升降人字梯， 其特征是： 所述的锁接装 置还包括若干个上下排列并均匀间隔地开设于升降梯的升降孔、一开设于过渡 梯的第一固定孔、一开设于固定梯的第二固定孔及一拉手； 其中， 该拉手可选 择锁接某一升降孔和第一固定孔或锁接第一固定孔和第二固定孔。
7. 根据权利要求 6所述的一种可升降人字梯， 其特征是： 所述的第二固 定孔的开设位置对应于固定梯的踏板位置；各升降孔的开设位置分别对应于升 降梯的对应踏板位置。
8. 根据权利要求 1所述的一种可升降人字梯， 其特征是： 所述的过渡梯 长度为固定梯长度的 1/4-1/2, 升降梯长度为固定梯长度的 1/2 - 1。
9. 根据权利要求 1所述的一种可升降人字梯， 其特征是： 所述的过渡梯- 上开设有滑槽， 升降梯滑动连接于滑槽。
10.根据权利要求 1所述的一种可升降人字梯，其特征是：所述的过渡梯 的靠近于固定梯的侧面上开设有匹配于固定梯侧部的容置槽。
PCT/CN2007/003095 2006-11-01 2007-10-31 Escabeau capable de s'élever WO2008052438A1 (fr)

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