WO2024038498A1 - Escabeau - Google Patents

Escabeau Download PDF

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Publication number
WO2024038498A1
WO2024038498A1 PCT/JP2022/030916 JP2022030916W WO2024038498A1 WO 2024038498 A1 WO2024038498 A1 WO 2024038498A1 JP 2022030916 W JP2022030916 W JP 2022030916W WO 2024038498 A1 WO2024038498 A1 WO 2024038498A1
Authority
WO
WIPO (PCT)
Prior art keywords
support leg
top plate
pin
stepladder
ladder
Prior art date
Application number
PCT/JP2022/030916
Other languages
English (en)
Japanese (ja)
Inventor
正志 樽見
Original Assignee
有限会社とまと不動産
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 有限会社とまと不動産 filed Critical 有限会社とまと不動産
Priority to PCT/JP2022/030916 priority Critical patent/WO2024038498A1/fr
Priority to JP2022554274A priority patent/JP7198466B1/ja
Publication of WO2024038498A1 publication Critical patent/WO2024038498A1/fr

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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
    • E06C1/14—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
    • 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 present invention relates to a folding stepladder.
  • a stepladder whose stepping leg can be folded inside the supporting leg is known (see, for example, Patent Document 1).
  • the foldable stepladder described in Patent Document 1 can be folded so that the stepladder is stored inside the support leg. This allows it to be made more compact than in use.
  • the folding stepladder described in Patent Document 1 the supporting legs are vertically shifted even when the folding stepladder is folded. As a result, the length of the stepladder is longer than before it was folded.
  • An object of the present invention is to provide a folding stepladder that can be folded into a shape that is easy to carry, and the length of the stepladder when folded is not longer than before folded.
  • the two ladders are each A hollow first support leg extending in a first direction, the first support leg having a first pin, a second pin, and a third pin spaced apart from one side to the other side in the first direction.
  • 1 support leg A hollow second support leg extending in a second direction, the second support leg having a fourth pin and a fifth pin spaced apart from the one side toward the other side in the second direction.
  • the first support leg and the second support extend and the first top plate and the first step are aligned in a third direction orthogonal to the first direction and the second direction. housed in the hollow part of the leg, A folding stepladder is provided, wherein a length of the folding stepladder in the first direction when the folding stepladder is folded is the same as a length of the first support leg in the first direction. Ru.
  • the first support leg, the second support leg, the first top plate of the top plate, the first step stool, and the second step ladder are all parallel. Furthermore, the first top plate and the first step are housed in the hollow portions of the first support leg and the second support leg while being lined up in a direction perpendicular to the extending direction of the first and second support legs. . This makes the folding stepladder easier to carry. Further, since the length of the folding stepladder in the first direction when the folding stepladder is folded is the same as the length of the first support leg in the first direction, the folding stepladder can be folded compactly. Can be done.
  • FIG. 1 is a schematic diagram of a folding stepladder 1 in use, viewed from the left.
  • FIG. 2 is a schematic diagram of the folding stepladder 1 in use when viewed from the front.
  • FIG. 3 is a schematic diagram for explaining the second shape of the folding stepladder 1.
  • FIG. 4 is a schematic diagram for explaining an intermediate state between the second shape and the third shape of the folding stepladder 1.
  • FIG. 5 is a schematic diagram for explaining the third shape of the folding stepladder 1.
  • FIG. 6 is a schematic diagram for explaining the fourth shape of the folding stepladder 1.
  • FIG. 7 is a schematic diagram for explaining a folding stepladder 1 according to a modified embodiment.
  • a foldable stepladder 1 according to an embodiment of the present invention will be described with reference to the drawings.
  • each direction is defined based on the front-back direction and the up-down direction shown by the arrow in FIG. 1, and the left-right direction and the up-down direction shown by the arrow in FIG.
  • FIG. 1 is a view of the folding stepladder 1 in use, viewed from the left.
  • FIG. 2 is a schematic diagram of the folding stepladder 1 in use when viewed from the front. Note that the view of the folding stepladder 1 from the left is the same as the view from the right, and the view of the folding stepladder 1 from the front is the same as the view from the rear.
  • the folding stepladder 1 includes a first ladder 11 and a second ladder 12 (see FIG. 2).
  • the first ladder 11 and the second ladder 12 correspond to two ladders of the present invention.
  • the first ladder 11 is placed in front of the second ladder 12.
  • the upper end portion of the first ladder 11 and the upper end portion of the second ladder 12 are connected by a hinge 13.
  • the foldable stepladder 1 can be folded so that the first ladder 11 and the second ladder 12 are in contact with each other. That is, the foldable stepladder 1 can be folded so that the rear end of the first ladder 11 and the front end of the second ladder 12 are in contact with each other.
  • the second ladder 12 can be rotated above the first ladder 11 so that the upper end of the first ladder 11 and the upper end of the second ladder 12 are in contact with each other. Thereby, the first ladder 11 and the second ladder 12 can be connected and used as one long ladder.
  • a stopper is installed between the first ladder 11 and the second ladder 12.
  • a locking mechanism 14 is provided.
  • the locking mechanism 14 includes a long plate-shaped hook plate 14a having a U-shaped groove at one end, and a pin 14b that rotatably fixes the other end of the hook plate 14a to the first ladder 11.
  • a lock pin 14c is provided on the second ladder 12 and fits into a U-shaped groove of a hook plate 14a. By fitting the lock pin 14c into the U-shaped groove of the hook plate 14a, the opening angle of the first ladder 11 and the second ladder 12 can be fixed.
  • the structure of the first ladder 11 will be explained.
  • the structure of the second ladder 12 is the same as the structure of the first ladder 11, so a description thereof will be omitted.
  • the first ladder 11 includes a top plate 20, an upper step 30 (an example of the first step of the present invention), and a lower step 40 (an example of the second step of the present invention). ) and a pair of support legs 50.
  • the first ladder 11 has a first shape shown in FIG. 2, a second shape shown in FIG. 3, a third shape shown in FIG. 5, and a fourth shape shown in FIG. The shape can be changed to Note that FIG. 4 shows an intermediate state between the second shape (see FIG. 3) and the third shape (see FIG. 5). Note that the fourth shape corresponds to the shape when the folding stepladder according to the present invention is folded.
  • the top plate 20 is a substantially rectangular parallelepiped-shaped member that spans the upper end portions of the pair of support legs 50 .
  • the top plate 20 includes a first top plate 120 connected to the left support leg (hereinafter referred to as the first support leg 50L) of the pair of support legs 50, and a right support leg of the pair of support legs 50. It includes a second top plate 220 connected to legs (hereinafter referred to as second support legs 50R).
  • the first top plate 120 is a hollow square columnar member, and a part of the second top plate 220 is slidably inserted into the hollow portion.
  • a first rail 121 extending in the left-right direction is provided on the outer wall portion of the first top plate 120.
  • the first rail 121 is fitted with a slide pin 151 (an example of the first pin of the present invention) fixed to the first support leg 50L. Thereby, the first top plate 120 is slidably connected to the first support leg 50L.
  • the second top plate 220 includes a first portion 222 fixed to the second support leg 50R by a plurality of fixing screws 152, and a second portion 223 slidably accommodated inside the first top plate 120.
  • a connecting portion 224 (see FIG. 3) that rotatably connects the second portion 223 to the first portion 222 is provided.
  • the second top plate 220 is slidable inside the first top plate 120 from the first position shown in FIG. 2 to the second position shown in FIG. 3.
  • the length of the top plate 220 in the left-right direction when the second top plate 220 is in the first position is shorter than the length in the left-right direction of the top plate 220 when the top plate 220 is in the second position. (See Figures 2 and 3). In detail, as shown in FIG.
  • the first support leg 50L and the second support leg 50R of the pair of support legs 50 face each other in a V-shape.
  • the folding stepladder 1 is now in a used state. As shown in FIG. 3, when the second top plate 220 is in the second position, the first support leg 50L and the second support leg 50R of the pair of support legs 50 are parallel to each other.
  • the upper treadle 30 is a hollow member in the shape of a substantially rectangular parallelepiped that spans the substantially central portion of the pair of support legs 50.
  • the left end of the upper treadle 30 is rotatably connected to the first support leg 50L by a rotation shaft pin 153 (an example of the second pin of the present invention) fixed to the first support leg 50L.
  • a second rail 131 is provided on the outer wall portion of the upper treadle 30 and extends in the longitudinal direction of the upper treadle 30 (left-right direction in FIG. 2).
  • the second rail 131 is fitted into a slide pin 154 (corresponding to the fourth pin of the present invention) fixed to the second support leg 50R.
  • the upper treadle 30 is slidably connected to the second support leg 50R.
  • the lower treadle 40 is a hollow member in the shape of a substantially rectangular parallelepiped, which spans the lower part of the upper treadle 30 of a pair of support legs 50.
  • a slit 141 extending in the left-right direction is provided at the left end of the lower step 40.
  • the slit 141 is rotatably and slidably connected to the first support leg 50L by a rotation shaft pin 155 (an example of the third pin of the present invention) fixed to the first support leg 50L.
  • a third rail 142 is provided on the outer wall portion of the lower treadle 40 and extends in the longitudinal direction of the lower treadle 40 (left-right direction in FIG. 2).
  • the third rail 142 fits into a slide pin 156 (an example of the fifth pin of the present invention) fixed to the second support leg 50R.
  • the lower treadle 40 is slidably connected to the second support leg 50R.
  • the length of the lower step 40 in the left-right direction is longer than the length of the upper step 30 in the left-right direction. Therefore, as shown in FIG. 3, when the first support leg 50L and the second support leg 50R are made parallel, the length of the lower step 40 in the left and right direction is 50R is longer than the length in the left-right direction. Therefore, openings 158 are provided in the first support leg 50L and the second support leg 50R at positions that overlap with the lower step 40 when viewed from the left and right directions (see FIG. 1). As a result, when the first support leg 50L and the second support leg 50R are made parallel, as shown in FIG. be exposed.
  • the subsequent process of folding the folding stepladder 1 involves deforming both the first ladder 11 and the second ladder 12 in the same way at the same time, with the first ladder 11 and the second ladder 12 overlapping in the front-back direction. It will be done. Therefore, the following explanation will focus on folding the first ladder 11 with reference to FIGS. 2 to 6.
  • the second portion 223 of the second top plate 220 and the connecting portion 224 are housed inside the first top plate 120. Therefore, the second top plate 220 is slid to the right so that the second top plate 220 is pulled out from the first top plate 120. This increases the distance in the left-right direction between the upper end of the first support leg 50L and the upper end of the second support leg 50R.
  • the rotating shaft pin 155 is slid to the right along the slit 141, and the slide pin 156 is slid to the left along the third rail 142.
  • the top plate 20, the upper treadle 30, and the lower treadle 40 are rotated counterclockwise about the slide pin 151 and rotation shaft pins 153, 155. 2.
  • the second support leg 50R is located above the first support leg 50L, and the distance in the left-right direction between the first support leg 50L and the second support leg 50R is shorter than in the second shape.
  • the first top plate 120 and the second top plate 220 are bent at the connecting portion 224.
  • the second support leg 50R is moved upward so as to rotate the top plate 20, upper treadle 30, and lower treadle 40 counterclockwise about the slide pin 151 and rotation axis pins 153, 155. .
  • the first ladder 11 and the second ladder 12 can be changed into the third shape (see FIG. 5).
  • the first support leg 50L, the second support leg 50R, the upper treadle 30, and the lower treadle 40 are parallel to the vertical direction.
  • the second rail 131 of the upper treadle 30 and the third rail 142 of the lower treadle 50 are also parallel to the vertical direction.
  • the slide pin 154 of the second support leg 50R is located on the upper end side of the second rail 131 of the upper treadle 30, and the slide pin 156 is located on the third rail of the lower treadle 40. 142 is located on the upper end side. Further, the slide pin 151 of the first support leg 50L is located on the lower end side of the first rail 121 of the first top plate 120. Therefore, the upper end of the second support leg 50R is located above the upper end of the first support leg 50L. That is, the vertical length of the folding stepladder 1 in the third shape is longer than the length in the vertical direction of the folding stepladder 1 in the first shape and the second shape.
  • the second support leg 50R is moved downward so that the slide pins 154 and 156 of the second support leg 50R slide downward along the second rail 131 of the upper step 30 and the third rail 142 of the lower step 40. Slide it.
  • the first ladder 11 and the second ladder 12 can be changed into the fourth shape (see FIG. 6).
  • the upper end of the first support leg 50L and the upper end of the second support leg 50R are in the same position in the vertical direction, and the lower end of the first support leg 50L and the second support leg 50R are in the same position.
  • the positions of the lower ends of the legs 50R in the vertical direction are the same.
  • the vertical length of the folding stepladder 1 in the fourth shape is the same as the length in the vertical direction of the folding stepladder 1 in the first shape and the second shape.
  • the slide pin 154 of the second support leg 50R is located on the lower end side of the second rail 131 of the upper step 30, and the slide pin 156 is located on the lower end side of the second rail 131 of the lower step 40.
  • the slide pin 151 of the first support leg 50L is located at the upper end of the first rail 121 of the first top plate 120.
  • the first top plate 120 of the top plate 20 is arranged to be aligned with the upper step 30 in the left-right direction in the cavity of the hollow portion of the first support leg 50L.
  • the vertical positions of the upper end and lower end of the second support leg 50R are the same as the upper and lower ends of the first support leg 50L, respectively. That is, the vertical length of the folding stepladder 1 in the fourth shape is the same as the length in the vertical direction of the folding stepladder 1 in the first shape and the second shape. Note that the expression that the lengths (or positions) are the same does not mean that they are exactly the same.
  • the folding stepladder 1 when the folding stepladder 1 is folded, the first support leg 50L and the second support leg 50R are in a state where the positions of both ends are aligned. That is, the length of the folding stepladder 1 in the vertical direction is the same as the length of the first support leg 50L in the vertical direction. Therefore, the foldable stepladder can be folded compactly.
  • the configuration of the folding stepladder 1 according to the present invention is not limited to the configuration in the above embodiment, and various changes can be made.
  • the first ladder 11 and the second ladder 12 of the folding stepladder 1 were each provided with two treads (upper tread 30 and lower tread 40).
  • the arrangement and number of treadles are not limited to this configuration.
  • each of the first ladder 11 and the second ladder 12 of the folding stepladder 1 may be provided with one step, or each may be provided with three or more steps. Further, the number of steps provided on the first ladder 11 and the second ladder 12 may not be the same.
  • extension legs 250 for extending the lengths of the first support leg 50L and the second support leg 50R are provided at the lower ends of the first support leg 50L and the second support leg 50R.
  • the extension leg 250 includes two substantially parallelogram-shaped plates 251 arranged to sandwich the lower part of the first support leg 50L (second support leg 50R) in the front-back direction, and It includes a connecting plate 252 that connects in the direction, and a rotation axis pin 253 that rotatably connects the two plate members 251 to the first support leg 50L (second support leg 50R).
  • FIG. 7 only the front plate 251 of the two plates 251 is illustrated.
  • the extension leg 250 provided on the first support leg 50L is rotated counterclockwise around the rotation axis pin 253, and the extension leg 250 provided on the second support leg 50R is rotated clockwise around the rotation axis pin 253.
  • the height (vertical length) of the folding stepladder 1 can be easily extended.
  • the shape, material, etc. of the folding stepladder 1 according to the present invention are not limited to specific ones, and can be changed as appropriate.
  • the folding stepladder 1 may be made of iron or aluminum. It does not necessarily have to be made of a metal material, and can also be made of a non-metallic material such as wood or plastic. Further, metal materials and non-metal materials can be combined as appropriate.

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  • Ladders (AREA)

Abstract

L'invention concerne un escabeau pliable en une forme portable. Cet escabeau comprend un premier montant (50L), un second montant (50R), un premier couvercle supérieur (120) d'un couvercle supérieur (20), une marche supérieure (30), et une marche inférieure (40) toutes étant parallèles l'une à l'autre lorsque l'escabeau est plié. En outre, le premier couvercle supérieur (120) et la marche supérieure (30) sont logés dans des parties creuses du premier montant (50L) et du second montant (50R) dans un état dans lequel le premier couvercle supérieur (120) et la marche supérieure (30) sont alignés dans une direction (direction gauche-droite) orthogonale à une direction d'extension (direction haut-bas) du premier montant (50L) et du second montant (50R).
PCT/JP2022/030916 2022-08-15 2022-08-15 Escabeau WO2024038498A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2022/030916 WO2024038498A1 (fr) 2022-08-15 2022-08-15 Escabeau
JP2022554274A JP7198466B1 (ja) 2022-08-15 2022-08-15 折りたたみ式脚立

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/030916 WO2024038498A1 (fr) 2022-08-15 2022-08-15 Escabeau

Publications (1)

Publication Number Publication Date
WO2024038498A1 true WO2024038498A1 (fr) 2024-02-22

Family

ID=84777490

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/030916 WO2024038498A1 (fr) 2022-08-15 2022-08-15 Escabeau

Country Status (2)

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JP (1) JP7198466B1 (fr)
WO (1) WO2024038498A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4954636U (fr) * 1972-08-21 1974-05-14
EP0136904A2 (fr) * 1983-09-30 1985-04-10 Reitzer, Joseph Echelle repliable
US5158151A (en) * 1992-01-21 1992-10-27 Chang Wan Li Bidirectionally foldable step ladder
WO2020035959A1 (fr) * 2018-08-16 2020-02-20 有限会社とまと不動産 Marchepied pliable

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4954636U (fr) * 1972-08-21 1974-05-14
EP0136904A2 (fr) * 1983-09-30 1985-04-10 Reitzer, Joseph Echelle repliable
US5158151A (en) * 1992-01-21 1992-10-27 Chang Wan Li Bidirectionally foldable step ladder
WO2020035959A1 (fr) * 2018-08-16 2020-02-20 有限会社とまと不動産 Marchepied pliable

Also Published As

Publication number Publication date
JP7198466B1 (ja) 2023-01-04
JPWO2024038498A1 (fr) 2024-02-22

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