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WO2018130166A1 - Escabeau pliant - Google Patents

Escabeau pliant Download PDF

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Publication number
WO2018130166A1
WO2018130166A1 PCT/CN2018/072180 CN2018072180W WO2018130166A1 WO 2018130166 A1 WO2018130166 A1 WO 2018130166A1 CN 2018072180 W CN2018072180 W CN 2018072180W WO 2018130166 A1 WO2018130166 A1 WO 2018130166A1
Authority
WO
WIPO (PCT)
Prior art keywords
ladder
locking
link
lateral support
outer casing
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/072180
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English (en)
Chinese (zh)
Inventor
黄崇华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 CN201710026893.0A external-priority patent/CN106677695B/zh
Priority claimed from CN201710059018.2A external-priority patent/CN106593285B/zh
Application filed by Individual filed Critical Individual
Publication of WO2018130166A1 publication Critical patent/WO2018130166A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding

Definitions

  • the invention relates to a folding ladder.
  • the two ladders can rotate relative to each other to form a certain angle.
  • the joints between the two ladders of the existing folding ladder are only positioned by simple snap positioning, and only a few buckles are set, generally three, so the adjustment angle between the two ladders There are only a limited number, generally three, which is inconvenient to adjust and affect the use of ladders.
  • the invention provides a folding ladder to solve the problem that the existing ladder angle adjustment is inconvenient.
  • the present invention provides a folding ladder, the folding ladder comprising: two hinged ladders, respectively a first ladder and a second ladder, and for articulating the first ladder and the second ladder a ladder joint, the ladder joint includes:
  • the first ladder and the second ladder are rotatably connected by the first hinge shaft;
  • the first locking teeth and the second locking teeth mesh with each other, and the first locking teeth and the second locking teeth are one-way locking.
  • the invention adopts the gear locking, and the two locking teeth are respectively connected with the two ladders, so that the variation of the adjustment angle and the continuity of the adjustment can be realized, and thus the change of the opening angle of the folding ladder can be adapted.
  • the present invention adopts a column spring to realize automatic locking, thereby avoiding the need for the traditional locking to align the snaps of the two ladders, thereby reducing the risk of the ladder opening. Furthermore, the present invention uses the column spring and the torsion spring to jointly return the second locking teeth. First, the double insurance is formed, and the wear of the column spring and the torsion spring is reduced, thereby increasing the service life of the entire joint.
  • the present invention uses a wire to control the position of the second locking teeth, thereby controlling the locking between the two locking teeth, so that it is not necessary to climb to the joint of the ladder like the conventional snap locking, that is, the ladder is the highest.
  • the connection of the points to lock or unlock the buckle the present invention can operate the pull wire at the lower part of the ladder to lock or unlock the two ladders, avoiding the need to climb to the apex of the ladder each time the ladder is folded or folded. It reduces the chance of accidents, increases safety, and facilitates quick collection.
  • first lateral support rod and the ladder body that is, the two hinged ladders are respectively connected by the first link and the second link, thereby increasing the stability of the first lateral support rod and increasing the number
  • the stability and strength of the internal connection between the lateral support bar and the two hinged ladders, and in turn, the first lateral support bar and the ladder body, ie the two hinged ladders, are locked by the first locking device Tight, thereby avoiding the first lateral support rod opening at will in use, reducing safety hazards.
  • first end of the first link is fixedly connected to the first ladder, and the second end of the first link is slidably coupled to the first lateral support rod; the first lock
  • the tensioning device is disposed on the first lateral support rod, so that only the first sliding support device can be disposed on the first lateral support rod, so that the first ladder and the second ladder can be avoided.
  • the chute or track for sliding the link reduces the manufacturing and installation steps, and can control the first link and the second link respectively by operating the first locking device on the first lateral support bar. Do two things at a time, to achieve fast control and lock.
  • the first locking device having the cam, the bolt and the spring returning structure, the quick adjustment, the quick switching, the firm locking, the automatic locking effect, and the safety can be realized.
  • first locking device is located below the first link and the second link, so that after the worker comes down from the ladder, the lock or unlock can be realized on the ground without having to climb to the ladder.
  • lock or unlock to ensure the stability and safety of the ladder before the ladder, to ensure the convenience of the ladder after the ladder.
  • the folding ladder of the present invention is particularly suitable for use in the field and in uneven terrain.
  • FIG. 1 is a perspective structural view showing a first angle of a first folding ladder according to an embodiment of the present invention
  • FIG. 2 is a schematic perspective structural view of a second angle of a first folding ladder according to an embodiment of the present invention; wherein, in order to show the structure of the ladder joint, a part of the structure of the first ladder and the second ladder is hidden;
  • FIG. 3 is a schematic perspective structural view of a second folding ladder according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a first locking device according to an embodiment of the present invention.
  • Figure 5 is a schematic view showing the external structure of a ladder joint according to an embodiment of the present invention.
  • Fig. 6 is a schematic view showing the internal structure of a ladder joint according to an embodiment of the present invention.
  • the first locking device 270, the first locking sleeve; 21, the adjusting bolt; 22, the hinge shaft; 23, the eccentric cam; 24, the handle; 25, the locking return spring; 201, the opening.
  • the folding ladder of the embodiment of the present invention comprises: two hinged ladders, and a ladder joint 10 for hingedly connecting the two hinged ladders.
  • the two hinged ladders are a first ladder 11 and a second ladder 12, respectively, and the ladder joint 10 includes:
  • the second locking tooth 2 is rotatably coupled to the second blade 12, that is, the second locking tooth 2 is rotatable relative to the second blade 12;
  • the first ladder 11 and the second ladder 12 are rotatably connected by the first hinge shaft 5;
  • the first locking tooth 1 and the second locking tooth 2 mesh with each other, and the first locking tooth 1 and the second locking tooth 2 are one-way locking, for example, the first ladder 11 and the second piece of the ladder 12 are close together, the first locking tooth 1 and the second locking tooth 2 may form a gear transmission, but if the first piece of the ladder 11 and the second piece of the ladder 12 are away from each other, the angle becomes larger When the first locking teeth 1 and the second locking teeth 2 are locked, the ladder is prevented from sliding outward during use, and after the unlocking, the first ladder 11 and the second ladder 12 can be separated from each other.
  • the first locking tooth 1 is a semi-ring gear, and since the maximum opening angle of the ladder is 180 degrees, the use of the semi-ring gear is sufficient to satisfy the maximum opening of the ladder. Angle, thereby reducing cost, reducing weight, and making the space more compact; the axis of the semi-ring gear is concentric with the first hinge shaft 5, and the second locking tooth 2 has two ends, respectively a second lock a first end of the tightening tooth and a second end of the second locking tooth, the second locking tooth further has an inner side surface and an outer side surface, the first end of the second locking tooth and the second piece of the ladder pass the first
  • the two hinge shafts 7 are hingedly connected, the semi-ring gears are located between the first hinge shaft 5 and the second hinge shaft 7; the second end of the second locking teeth is pressed against the returning action
  • the inner side of the second locking tooth 2 is a circular arc shape, and the circular arc shape is coaxial with the gear of the first locking tooth or with the first hinge shaft, so
  • the column spring (column spring) 9 causes the second locking tooth 2 to be automatically pressed against the first locking tooth 1 when the second locking tooth 2 is opposite to the first locking tooth
  • the second locking tooth 2 receives an inward force, that is, the second locking tooth 2 receives a force from the second end of the second locking tooth to the first end of the second locking tooth.
  • the first end of the second locking tooth is a fixed end, the first end of the second locking tooth cannot move, thereby preventing the second locking tooth 2 from rotating inward relative to the first locking tooth 1 Preventing the two ladders from opening; but for the second locking teeth 2 to rotate outward relative to the first locking teeth 1, at this time, the second locking teeth 2 are subjected to the outward thrust of the first locking teeth 1, the second locking
  • the second end of the tightening tooth is a non-fixed end.
  • the second locking tooth 2 receives the outward force of the first locking tooth 1 by more than the restoring force of the column spring 9, although the restoring force of the column spring 9 is not, Affecting the second locking tooth 2 to rotate or move outward relative to the first locking tooth 1 , so that the pressure of the second locking tooth 2 pressed against the first locking tooth 1 is relatively rotated with the second locking tooth 2 and Not contradictory Thus relative rotation of the second locking tooth 2 is not affected, i.e., when the two ladder collapsed, does not affect the joint collapsed or stowed ladder.
  • the ladder joint 10 further includes: a first outer casing 3 wrapped around the first locking teeth 1, and a second locking covering a second outer casing 4 other than the teeth 2, the first outer casing 3 and the second outer casing 4 are hinged by the first hinge shaft 5; the first outer casing 3 and the second outer casing 4 may Relative rotation, forming different angles to form different opening angles of the ladder;
  • the first outer casing 3 is fixedly connected to the first ladder 11 and the second outer casing 4 is fixedly connected by the second ladder 12;
  • the first locking tooth 1 is fixedly connected to the first outer box 3, and the second locking tooth 2 is hingedly connected to the second outer box 4 by the second hinge shaft 7;
  • the first locking tooth 1 is fixedly connected to the first piece of ladder 11 through the first outer box 3;
  • the second locking tooth 2 is rotatably connected to the second outer box by a second hinge shaft 7 and
  • the second ladder 12 is connected, and the second outer casing 4 is further provided with a spring seat 8 for supporting the column spring 9.
  • the first outer casing 3 and the second outer casing 4 mainly serve to close and protect the respective locking teeth, respectively, and provide fixing and support for the respective locking teeth; and can also provide support for the column spring 9.
  • the second hinge shaft 7 is sleeved with a torsion spring (not shown) for returning the second locking teeth 2.
  • the torsion spring also acts as a resilience, enabling the two locking teeth to be automatically locked without interference from external forces.
  • the second hinge shaft 7 is disposed on the second outer casing 4, the bottom of the second hinge shaft 7 protrudes from the second locking tooth 2 and exposes the second outer casing 4, and the top of the second hinge shaft 7 protrudes from the second
  • the locking teeth 2 are respectively sleeved on the bottom of the second hinge shaft 7 and the top of the second hinge shaft 7, respectively, which are respectively sleeved on both ends of the second hinge shaft 7, which can restore the function on the one hand, and On the one hand, it can also play the role of axial positioning and buffering of the second hinge shaft 7, and has a good balance effect.
  • first outer box 3 has a first end of the first outer box and a second end 32 of the first outer box
  • second outer box 4 has a first end and a second outer side of the second outer box a second end 42 of the cartridge, the first end of the first outer casing being hinged to the first end of the second outer casing; the second end 32 of the first outer casing being coupled to the first ladder 11
  • the second end 42 of the second outer casing is fixedly connected to the second ladder 12;
  • the ladder joint 10 further includes: a pull wire 6 connecting the second end of the second locking tooth 2, the pull wire 6 being located in the second outer box 4 and extending out of the second outer box
  • the end 42 is connected to the outer surface of the second ladder (the second ladder or its vertical side is hollow, the wire is routed from the inside of the vertical side, and the side wall of the second ladder or the vertical side is pierced
  • the outer surface of the second ladder is provided with a wrench connecting the wire; after the second end of the second locking tooth 2 is locked with the first locking tooth 1, the wire can overcome the pressure of the torsion spring.
  • the position of the second locking tooth is controlled by the wire to control the locking between the two locking teeth, so that it is not necessary to climb to the joint of the ladder like the traditional snap locking, that is, the connection point of the highest point of the ladder
  • the present invention can operate the cable at the lower part of the ladder to lock or unlock the two ladders, avoiding the need to climb to the apex of the ladder each time the ladder is folded or folded, thereby reducing the accident.
  • the chance of occurrence increases safety and is quick and easy to close.
  • the wire 6 is connected to the second end of the second locking tooth 2 through the column spring 9, so that the setting is ingenious, and the problem that the wire is wound around other components does not occur.
  • the second end of the second locking tooth 2 may be provided with a threading groove 20 for fixing the wire to the second end of the second locking tooth 2.
  • the second outer casing 4 is further provided with a guiding device 45 for guiding the pulling wire 6, and the direction of the pulling wire 6 can be adjusted.
  • the guiding device 45 is, for example, a guide post.
  • the semi-ring gear (180 degrees) is provided with 6 to 90 teeth, for example, 10, 20, 30, 40, 50, 60, 70, 80, 90 uniformly distributed teeth, or 20- 30 teeth, 30-40 teeth, 40-50 teeth, 50-60 teeth, 70-80 teeth, 80-90 teeth, which can achieve continuous multi-angle fine adjustment in the range of 180 degrees. Can meet the various needs of the ladder open.
  • the second locking tooth 2 is a rack having a circular inner side surface, and the number of teeth of the rack is 3 to 6. Since the first locking tooth 1 has a plurality of teeth, it can be rotated by 180 degrees. Therefore, the second locking tooth 2 only needs a few teeth, and the length of the second locking tooth 2 can be made smaller, and the number of teeth can be It is less done, easy to manufacture, process and install, and to reduce the quality of the ladder.
  • the semi-ring gear is fixed on the first outer box 3 by two or more rivets 30, for example, by three rivets, so that the first locking teeth 1 are fixed and stable, and are not relatively first.
  • the outer box 3 is rotated.
  • first outer box 3 and the second outer box 4 are both upper and lower split structures, and mainly protect and close the upper and lower ends of the first locking teeth 1 and the second locking teeth 2,
  • An outer box 3 and the second outer box 4 are provided with openings at the mutual engagement of the first locking teeth 1 and the second locking teeth 2 so as not to affect the engagement and rotation of the two locking teeth, first The outer box 3 and the second outer box 4 are equally divided into upper and lower halves so as to form the first locking teeth 1 and the second locking teeth 2 to form a closure.
  • the ladder joint of the invention can realize stable locking and multi-angle precise adjustment of the folding ladder.
  • the invention adopts the cable to control the locking, so that it is not necessary to climb to the joint of the ladder, that is, the joint of the highest point of the ladder, to lock or unlock the buckle, as in the conventional snap locking, the present invention can operate the cable at the lower part of the ladder.
  • locking or unlocking the two ladders avoids the need to climb to the apex of the ladder each time the ladder is folded or folded, which reduces the chance of accidents, increases safety, and facilitates quick retraction.
  • the folding ladder of the invention has firm locking and is suitable for various terrains, including uneven mountain areas.
  • the folding ladder of the present invention further comprises: lateral support bars respectively disposed on two sides of the two ladders, wherein the lateral support bars are respectively disposed on the two ladders a first lateral support bar 13 on the side, and a second lateral support bar 14 disposed on the second side of the two ladders;
  • the first lateral support bar 13 is located in the rectangular parallelepiped formed by the first ladder 11 and the second ladder 12
  • the second lateral support bar 14 is also located outside the cuboid space or the ladder-shaped space formed by the first and second ladders 11 and 12, and the folding ladder further includes:
  • first link 151 movably coupled between the first blade 11 and the first lateral support bar 13; for example, the first link 151 is slidably coupled by a universal joint or a hinge (without adjusting bolts) Between the first piece of ladder 11 and the first lateral support rod 13;
  • a second link 152 movably coupled between the second blade 12 and the first lateral support bar 13; for example, the second link 152 is slidably coupled by a universal joint or a hinge (without adjusting bolts) Between the second piece of ladder 12 and the first lateral support rod 13;
  • Locking the first locking device 27 of the first connecting rod and/or the second connecting rod, connecting the first connecting rod and/or the second connecting rod; the first connecting rod or the second connecting rod may be respectively used A locking device is locked, and a locking device can be shared;
  • the first locking device 27 is disposed on the first piece of ladder, or on the second piece of ladder, or on the first lateral support rod.
  • the first lateral support rod and the ladder main body, that is, the two hinged ladders are respectively connected by the first connecting rod and the second connecting rod, thereby increasing the stability of the first lateral supporting rod and increasing the first side
  • the stability and strength of the internal connection between the support rod and the two hinged ladders, and in turn, the first lateral support rod and the ladder body, ie the two hinged ladders, are locked by the first locking device, Thereby, the first lateral support rod is prevented from being opened at will in use, which reduces safety hazards.
  • folding ladder further includes:
  • a third link 153 movably connected between the first blade 11 and the second lateral support bar 14 , for example by a universal joint or a hinge (without adjusting bolts);
  • the fourth link 154 is movably coupled between the second blade 12 and the second lateral support bar 14 by, for example, a universal joint or a hinge (without adjusting bolts);
  • the second locking device is disposed at the On a ladder, or on the second ladder, or on the second lateral support rod.
  • the sides of the ladder are symmetrical, and the structure of the lateral support rods and the locking devices on both sides is the same to achieve symmetry of the force.
  • the first link 151 has two ends, which are respectively a first end (upper end) of the first link and a second end (lower end) of the first link, the first a first end of the connecting rod is fixedly coupled to the first ladder 11 , a second end of the first connecting rod is slidably coupled to the first lateral supporting rod; and the second connecting rod 152 has two a first end (upper end) of the second link and a second end (lower end) of the first link, the first end of the second link is fixedly connected to the second ladder, a second end of the two links is slidably coupled to the first lateral support bar; the first locking device 27 is slidably disposed on the first lateral support bar 13, the first locking The device 27 simultaneously connects the first link 151 and the second link 152.
  • the first locking device 27 includes:
  • the first locking sleeve 270 can be elastically sleeved on the first lateral support rod 13.
  • the first locking sleeve 270 can be respectively provided with a rotating shaft connected to the first connecting rod and connected with the second connecting rod.
  • the first shaft and the second link are independently rotatable relative to the first locking sleeve 270;
  • the first locking sleeve is annular with an opening 201, such as a rectangular ring having an opening 201, the first lock
  • the sleeve 270 may be provided on the outer wall of the opposite side of the opening 201 with a lug for respectively providing a rotating shaft connected to the first connecting rod and a rotating shaft connected to the second connecting rod;
  • the first locking sleeve has a first locking sleeve first end and a first locking sleeve second end; the opening 201 is disposed in the Between the first end of the first locking sleeve and the second end of the first locking sleeve; when the opening 201 of the first locking sleeve 270 is relaxed, the inner wall of the first locking sleeve 270 and the first lateral support rod 13 There is a gap between the outer walls, the first locking sleeve 270 can slide on the first lateral support rod 13; when the opening of the first locking sleeve 270 is tightened, the inner wall of the first locking sleeve 270 and the first The gap between the outer walls of the lateral support rods 13 is eliminated or reduced, and the inner wall of the first locking sleeve 270 is in contact with or abuts against the outer wall of the first lateral support rods 13, which form a static friction,
  • An adjusting bolt 21 for controlling the size of the opening 201 penetrates the opening 201, and is connected between the first end of the first locking sleeve 270 and the second end of the first locking sleeve; the length of the adjusting bolt 21 The direction is perpendicular to the longitudinal direction of the first lateral support rod 13; the first end of the adjusting bolt is a nut, and the end end of the adjusting bolt is a screw end;
  • a hinge shaft 22 of the locking device is disposed at a tail end of the adjusting bolt 21, and a longitudinal direction of the hinge shaft 22 is perpendicular to a longitudinal direction of the adjusting bolt and parallel to a longitudinal direction of the first lateral supporting rod 13;
  • An eccentric cam 23 is hinged on the hinge shaft 22 of the locking device and an outer edge of the eccentric cam 23 is pressed against an outer side surface of the second end of the first locking sleeve;
  • the locking return spring 25 is sleeved on the adjusting bolt 21 and located between the first end of the first locking sleeve and the second end of the first locking sleeve.
  • the eccentric cam 23 When the handle 24 is pulled, the eccentric cam 23 is rotated about the hinge shaft 22. During the rotation of the eccentric cam 23, the advancement and retreat of the adjusting bolt 21 is driven to adjust the size of the opening 201. Therefore, when the opening of the first locking sleeve 270 is opened, When tightened, the gap between the inner wall of the first locking sleeve 270 and the outer wall of the first lateral support rod 13 is eliminated or reduced, and the inner wall of the first locking sleeve 270 is opposite to the outer wall of the first lateral support rod 13. Fitted or abutted, the two form a static friction such that the first locking sleeve 270 is fixed to the first lateral support rod 13 to form a locking of each link.
  • the locking return spring 25 for example a compression spring, acts as an automatic return to facilitate automatic locking.
  • the inner wall of the first locking sleeve 270 is a rectangle having an opening
  • the outer side surface of the first lateral support rod 13 is rectangular, that is, the first locking sleeve 270 has an opening.
  • the annular shape of the rectangle, the first lateral support rod 13 is a solid rod or a hollow rod or tube.
  • the solid rod is selected in the present invention
  • the adjusting bolt 21 is disposed in the two protruding side walls at the opening of the first locking sleeve 270.
  • the two side walls of the opening protrude upward), and the two protruding side walls are vertically adjusted to the axial direction of the bolt 21, therefore, the adjusting bolt 21, for example, the nut of the adjusting bolt, and the two sections
  • the protruding side wall is a contact between the plane and the plane.
  • the locking is stronger than the locking of the bolt and the circular tube, the contact area is increased, the locking area is increased, and the first lateral support rod 13 is a rectangular rod or
  • the rectangular tube can withstand a larger locking force than the circular tube, and even if there is a gap, it is not easily deformed and is not easily broken. The bolt and the circular tube are locked.
  • the contact between the bolt and the circular tube is not a plane contact. Therefore, on the one hand, the circular tube has The notch is easily bent under the tightening action of the bolt; on the other hand, the contact surface is not flat, and the bolt and the circular tube are easily worn, and it is easy to be damaged after a long time.
  • first locking device 27 is located below the first end of the first link 151 and below the first end of the second link 152. In this way, after the worker comes down from the ladder, it can be locked or unlocked on the ground. It is not necessary to climb to the ladder to lock or unlock, which ensures the stability and safety of the ladder before the ladder, ensuring the ladder. The convenience of the ladder is put away.
  • first ladder 11 and the second ladder 12 are hingedly connected by a first hinge
  • the first ladder includes: a first vertical side 111, a second vertical side 112, and a connection a plurality of lateral sides between a vertical side and a second vertical side
  • the first end of the first link is fixedly coupled to the first vertical side of the first ladder
  • the first link 151 The distance between the first end (upper end) and the first hinge shaft is 1/8 to 1/2 of the distance between the first end of the first link and the bottom end (ground end) of the first ladder .
  • the position of the first connecting rod is set reasonably, and the angle adjustment and the length adjustment can be performed, so that the first connecting rod can bear the force reasonably, share the overall force of the ladder, and reduce the stress on other parts.
  • the distance between the first end (upper end) of the first link 151 and the first hinge shaft is the first end of the first link and the bottom end (ground end) of the first ladder From 1/6 to 1/4 of the distance, this ratio is suitable for reasonable load.
  • first vertical side 111 of the first ladder, the first link 151 and the first lateral support rod 13 form a triangle, and the first vertical of the first ladder
  • the angle between the edge 111 and the first link 151 is at most 120 degrees, which can satisfy a large adjustment range and a reasonable force angle.
  • the angle between the first vertical side of the first ladder and the first link is at most 120 degrees, the angle between the first link and the first lateral support bar is At 60 degrees, the angle between the first vertical side of the first ladder and the first lateral support rod is 60 degrees, so that the force distribution is reasonable.
  • the maximum angle between the first ladder 11 and the second ladder 12 is 60 degrees. Therefore, the angle between the first ladder and the second ladder is 60 degrees, the angle between the first link and the first lateral support bar is 60 degrees, and the first vertical side of the first ladder And the angle of the first lateral support bar is 60 degrees, that is, the tetrahedron formed by the first link, the first lateral support bar, the first ladder and the second ladder has multiple At an angle of 60 degrees, a plurality of equilateral and equiangular tetrahedrons are formed, so that the entire ladder has the most stable structure in mechanical properties.
  • the rotation range of the first lateral support rod 13 is hemispherical, and the first lateral support rod 13 is located outside the rectangular space or the ladder-shaped space formed by the first ladder 11 and the second ladder 12,
  • the two lateral support bars 14 are also located outside the rectangular space or the ladder-shaped space formed by the first and second ladders 11 and 11, and the first lateral support bars 13 and the second lateral support bars 14 may be located in the first piece.
  • the intermediate position of the ladder 11 and the second ladder 12 may also be located at a non-intermediate position of the first ladder 11 and the second ladder 12, and may be adjusted according to actual application conditions.
  • the invention increases the stability of the two lateral support bars, increases the stability and strength of the internal connection between the two lateral support bars and the two hinged ladders, and in turn, the two sides through the two locking devices
  • the support rod and the ladder main body, that is, the two hinged ladders are locked, thereby avoiding the two lateral support rods from being loosely opened during use, thereby reducing safety hazards.
  • first lateral support rod and/or the second lateral support rod is a telescopic rod
  • the telescopic rod includes at least: a first joint rod 131 and a second joint rod 132 connected to each other, the first The first rod and the second rod are respectively provided with a plurality of different height connecting holes, and the connecting holes are provided with positioning pins or positioning screws, the first Positioning rod and second rod positioning pin or positioning screw positioning connection;
  • the first node bar 131 and the second node bar are rectangular rods; or as shown in FIG. 2, the first node bar and the second node bar have a rectangular cross section, and the first node of the telescopic rod
  • the second section rod can be integrally formed of aluminum alloy or formed of other metal materials.

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Abstract

La présente invention concerne un escabeau pliant qui comprend deux échelles qui sont reliées de manière articulée, ainsi que des articulations d'échelle (10). Les deux échelles qui sont reliées de manière articulée, sont respectivement une première échelle (11) et une seconde échelle (12). Les articulations d'échelle (10) sont utilisées pour relier de manière articulée la première échelle (11) et la seconde échelle (12). Les articulations d'échelle (10) comprennent chacune une première partie de dent de verrouillage (1) et une seconde partie de dent de verrouillage (2). Les premières parties de dent de verrouillage (1) sont reliées de manière fixe à la première échelle (11); les secondes parties de dent de verrouillage (2) sont reliées en rotation à la seconde échelle (12). La première échelle (11) et la seconde échelle (12) sont reliées en rotation au moyen de premiers arbres de charnière (5). Les premières parties de dent de verrouillage (1) et les secondes parties de dent de verrouillage (2) sont en prise les unes avec les autres; et les premières parties de dent de verrouillage (1) et les secondes parties de dent de verrouillage (2) mettent en œuvre un verrouillage unidirectionnel. Au moyen d'un verrouillage à base d'engrenage, l'escabeau peut mettre en œuvre un réglage d'angle continu, ce qui permet de s'adapter au changement d'un angle d'ouverture d'un escabeau.
PCT/CN2018/072180 2017-01-15 2018-01-11 Escabeau pliant Ceased WO2018130166A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201710026893.0A CN106677695B (zh) 2017-01-15 2017-01-15 梯关节
CN201710026893.0 2017-01-15
CN201710059018.2 2017-01-23
CN201710059018.2A CN106593285B (zh) 2017-01-23 2017-01-23 具有锁紧装置的折叠梯

Publications (1)

Publication Number Publication Date
WO2018130166A1 true WO2018130166A1 (fr) 2018-07-19

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Application Number Title Priority Date Filing Date
PCT/CN2018/072180 Ceased WO2018130166A1 (fr) 2017-01-15 2018-01-11 Escabeau pliant

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WO (1) WO2018130166A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109138826A (zh) * 2018-11-13 2019-01-04 李月辉 一种防晃装置及梯子
CN112523674A (zh) * 2021-01-05 2021-03-19 孔超超 一种户外用底高度电力检修梯
CN112647833A (zh) * 2020-12-21 2021-04-13 唐冬冬 一种铝合金型材
USD966556S1 (en) 2019-12-13 2022-10-11 Murphy Ladder Llc Ladder

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CN106593285A (zh) * 2017-01-23 2017-04-26 黄崇华 具有锁紧装置的折叠梯
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DE1654888B2 (de) * 1967-07-06 1976-07-29 Bahmüller, Wilhelm, 7067 Plüderhausen Zusammenklappbare mehrzweckleiter
CN2161713Y (zh) * 1993-02-15 1994-04-13 庄清宝 折合梯之结构
US20020074187A1 (en) * 2000-02-15 2002-06-20 Bendle Fred Albert Stabilizers for a step ladder and a step ladder equipped with stabilizers
KR100518095B1 (ko) * 2005-08-18 2005-09-29 주식회사무영아멕스건축사사무소 건설현장용 슬라이딩 및 절첩식 이동 사다리
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109138826A (zh) * 2018-11-13 2019-01-04 李月辉 一种防晃装置及梯子
USD966556S1 (en) 2019-12-13 2022-10-11 Murphy Ladder Llc Ladder
CN112647833A (zh) * 2020-12-21 2021-04-13 唐冬冬 一种铝合金型材
CN112523674A (zh) * 2021-01-05 2021-03-19 孔超超 一种户外用底高度电力检修梯
CN112523674B (zh) * 2021-01-05 2023-08-08 国网江苏省电力有限公司宿迁供电分公司 一种户外用底高度电力检修梯

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