WO2008000161A1 - Structure de montant pour une échelle coulissante - Google Patents

Structure de montant pour une échelle coulissante Download PDF

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Publication number
WO2008000161A1
WO2008000161A1 PCT/CN2007/001944 CN2007001944W WO2008000161A1 WO 2008000161 A1 WO2008000161 A1 WO 2008000161A1 CN 2007001944 W CN2007001944 W CN 2007001944W WO 2008000161 A1 WO2008000161 A1 WO 2008000161A1
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WO
WIPO (PCT)
Prior art keywords
leg
tube
ladder
tube structure
pedal
Prior art date
Application number
PCT/CN2007/001944
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 WO2008000161A1 publication Critical patent/WO2008000161A1/zh

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/086—Connections between rungs or treads and longitudinal members with a connecting piece inserted in a hollow rung
    • 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
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/088—Connections between rungs or treads and longitudinal members with tie rods parallel to the rungs

Definitions

  • the invention belongs to the field of daily necessities, and in particular relates to a leg tube structure of a telescopic ladder. Background technique
  • Ladders are a tool used primarily for picking up and dropping items. They are widely used in a variety of different situations, especially retractable ladders, which are favored by people because of their adjustable twist.
  • a retractable ladder of the prior art includes two retractable leg tubes, a plurality of pedals coupled between the two retractable leg tubes, and a positioning structure for telescopic positioning of the leg tubes, wherein the retractable leg tubes are mutually retractable
  • the sliding inner and outer leg structures are composed of two inner legs and a plurality of pedals connected between the inner legs to form an inner ladder.
  • the outer legs are formed by a plurality of pedals connected between the two outer legs and the outer legs, and the inner and outer legs are made of metal.
  • the material is integrally formed, such as aluminum material
  • the inner leg is a pipe member
  • the outer leg is formed by a transparent opening of the pipe member in the axial direction, and the inner cavity of the outer leg can accommodate the inner leg.
  • the leg tube of the structure actually provides an axial slideway from the lumen in the opening of the outer leg, and the inner leg can slide axially in the lumen in the opening of the outer leg, thereby making the inner leg relatively
  • the telescopic extension of the outer leg achieves the purpose of telescopic stretching of the ladder. When telescopic, the entire inner ladder slides axially in the lumen of the outer leg, and the telescopic inner and outer ladders are positioned by mutual positioning structures.
  • the ladder formed by the structure in which the inner and outer leg tubes are sleeved and slidable can realize the telescopic function of the ladder, but still has the following drawbacks:
  • second due to the structure and size of the inner leg leg tube and the outer leg leg tube Different, so there are two kinds of molds for making the inner leg and the outer leg separately when forming, which adds difficulty to the production of the product; thirdly, because the inner leg has inner legs, the pedal can not be connected to the two tubes.
  • the inner ladder slides in the lumen of the outer leg as a whole. , When mounting the legs a slight deviation, it is easy to influence the inner leg slide freely, thus affecting the telescopic ladder to achieve a telescopic function.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a leg tube structure of a telescopic ladder.
  • Confirmation ⁇ Use the inner and outer leg structures of the original phase set to be changed into the front and rear leg structures, and the hooks and buckles between the front and rear legs, so as to ensure that the front and rear leg pipes can reduce the amount of materials used and reduce the strength requirements.
  • the manufacturing cost can also make the front and rear leg tubes slide freely, and the pedal can be connected to the two walls of the leg tube, thereby greatly improving the connection strength between the pedal and the leg tube, and ensuring the safety of the pedal use.
  • the front and rear leg tubes can achieve the same structural features, which greatly facilitates the processing and processing of the leg tubes.
  • a leg tube structure of a retractable ladder includes a front leg and a rear leg which are juxtaposed, and the front leg and the rear leg are formed by integrally forming a metal material.
  • the leg legs are axially interposed between the rear legs by respective hook pieces to form a leg tube structure which is slidable in the axial direction and is mutually positioned in the radial direction.
  • the front leg and the rear leg are an elongated hollow tubular body integrally formed of an aluminum material.
  • the hook piece is provided with two 90 degree bends.
  • the cross-sectional shape of the front leg and the rear leg is a rectangle.
  • the side walls of the front legs and the rear legs are respectively provided with notches for restricting the pedals from being turned over.
  • the rear leg is formed by rotating the front leg 180 degrees around the axis.
  • the leg tube structure of the retractable ladder of the present invention uses the front leg and the rear leg structure, and the hook pieces which are extended by the front leg and the rear leg are hooked together.
  • the front leg or the rear is seen from the cross section.
  • the leg wall can be made into a closed shape. Therefore, the structural strength of the front and rear leg tubes is greatly improved, and the tube walls of the front and rear leg tubes need not be thickened, so that the amount of materials used is reduced, thereby reducing the manufacturing cost. , to enhance the competitiveness of the product.
  • the juxtaposed front and rear leg structures allow the pedals between the two front legs that make up the ladder and the pedals between the two rear legs that make up the ladder to be connected to the walls of the two tubes instead of a single
  • the wall is connected so that the strength of the connection between the pedal and the leg tube can be improved, and the safety of the pedal is ensured.
  • the buckle hook piece is provided with two 90 degree bending parts, and the front leg and the rear leg are respectively inserted into each other through the respective hook pieces in the axial direction, the front leg Between the rear legs and the rear legs, they can only slide in the axial direction, and the radial front legs and the rear legs cannot be disengaged from each other. Since the hook piece has two 90-degree bent portions, there is substantially no displacement space between the front leg and the rear leg in the front-rear direction, and the leg tube of the structure is along the leg tube itself, between the front leg and the rear leg. There is also a certain displacement space along the lateral direction.
  • a pedal is connected between the two leg tubes, and the pedals define that the front and rear legs of the leg tube cannot be laterally Radial displacement. And the hook pieces are hooked to each other so that between the front leg and the rear leg Sliding freely, easy to realize the telescopic ladder telescopic function.
  • the cross-sectional shape of the front leg and the rear leg is preferably a rectangular shape, so that the mutual sliding between the front leg and the rear leg can be facilitated, thereby realizing the expansion and contraction of the ladder.
  • the leg tube structure of the retractable ladder of the present invention is provided with a notch for restricting the pedal turning on the pipe walls on both sides of the front leg and the rear leg, and the notch is used for engaging the end edge of the pedal, and the end edge of the pedal is
  • the recesses of the front or rear legs form a phase-locking effect, which facilitates the installation of the pedal and prevents the pedal from flipping.
  • the rear leg is formed by rotating the front leg 180 degrees around the axis, so that the front leg and the rear leg can be made by using a mold in the structure, but when used, the front leg
  • the pipe of the same structure of the leg rotates 180 degrees around the axis to form the rear leg.
  • the ladder needs to have two leg pipes, usually the two leg pipes are symmetrical, therefore, the front legs of the first leg tube
  • the hind legs of the first leg tube are rotated 180 degrees around the axis of the front leg of the first leg tube
  • the front leg of the second leg tube is turned over by the front leg of the first leg tube 180
  • the hind legs of the second leg tube are rotated by 180 degrees around the axis of the front leg of the second leg tube.
  • the required pedal is coupled between the front leg of the first leg tube and the front leg of the second leg tube to form a front ladder, and is also coupled between the rear leg of the first leg tube and the rear leg of the second leg tube.
  • the required pedals constitute the rear ladder, and then the front and rear ladders are nested along the corresponding hooks, so that the front leg and the rear leg of the first leg tube and the front leg of the second leg tube A structure is formed between the rear legs and the rear legs that are slidable in the axial direction and are mutually positioned in the radial direction.
  • the utility model has the beneficial effects that the front leg and the rear leg are juxtaposed, and the tube wall of the front leg integrally extends rearwardly with the bent hook piece, and the tube wall of the rear leg extends integrally forwardly.
  • the front leg and the rear leg are axially nested with each other through the respective hook pieces to form a leg tube structure which can slide along the axial direction and are mutually positioned in the radial direction, which can ensure
  • the front and rear leg tubes reduce the amount of material used to reduce the production cost under the premise of meeting the strength requirements, and can also slide the front and rear leg tubes freely, and can also connect the pedals on the two walls of the leg tube, thereby greatly improving
  • the strength of the connection between the pedal and the leg tube ensures the safety of the pedal.
  • FIG. 1 is a schematic cross-sectional view of the present invention
  • Figure 2 is a schematic cross-sectional view of the present invention for a pedal joint
  • Figure 3 is a front view of the telescopic ladder
  • Figure 4 is a side view of the telescopic ladder
  • Figure 5 is a front view of the telescopic ladder (elongated state).
  • Figure 6 is a side view of the telescopic ladder (extended state).
  • Figure 7 is a cross-sectional view taken along line A - A of Figure 6;
  • Figure 8 is an enlarged cross-sectional view of the portion B of Figure 6.
  • a leg tube structure of a retractable ladder of the present invention includes a front leg 1 and a rear leg 2 which are juxtaposed in parallel, and the front leg 1 and the rear leg 2 are long strips integrally formed of aluminum material.
  • a hollow tubular body the tube wall of the front leg integrally extends rearwardly and provided with a bent hook piece 11
  • the tube wall of the rear leg integrally extends forwardly with a correspondingly buckled hook piece 21
  • the front leg 1 and the rear leg 2 are axially nested with each other by the respective hook pieces 11, 21 to form leg tube structures which are slidable in the axial direction and are mutually positioned in the radial direction.
  • the hook piece 11 is provided with two 90-degree bent portions 111, and the hook piece 21 is provided with two 90-degree bent portions 211;
  • the front leg 1 has a rectangular cross-sectional shape, and the rear leg 2 has a sectional shape of Rectangular;
  • the tube walls on both sides of the front leg 1 are respectively provided with notches 12 for restricting the pedal turning, and the tube walls on both sides of the rear leg 1 are also respectively provided with notches 22 for restricting the pedal turning;
  • the hind legs 2 are from the front legs 1 is rotated 180 degrees around the axis.
  • the leg tube structure of the telescopic ladder of the present invention adopts the structure of the front leg 1 and the rear leg 2, and the hook pieces 11 and 21 extending by the front leg 1 and the rear leg 2 are hooked together, on the one hand, from the cross section Regardless of whether the front leg 1 or the rear leg 2, the wall of the tube can be made into a closed shape, so that the structural strength of the front and rear leg tubes 1, 2 is greatly improved, and the wall of the front and rear leg tubes 1, 2 There is no need to thicken, which reduces the amount of material used, thereby reducing the production cost and improving the competitiveness of the product.
  • the juxtaposed front and rear legs 1, 2 structure, such that the pedal 31 between the two front legs constituting the ladder and the pedal 32 between the two rear legs constituting the ladder can be connected to the two pipe walls
  • a screw can be used to pass through the two walls of the front leg 1 or the rear leg 2 with the pedal 31 or the pedal 32 is locked together, as shown in FIG. 4 and FIG.
  • connection hole 13 is provided at the connection between the front leg 1 and the pedal 31 for connecting with the pedal 31, and the rear leg 2 is
  • a connection hole 23 is provided at the junction with the pedal 32 for achieving connection with the pedal 32, and the connection hole 13 of the front leg 1 is provided.
  • the connecting hole 23 of the rear leg 2 can be formed by integrally forming a long strip-shaped hollow tubular body with an aluminum material, and then opening the hole, so that the pedal 31 and the front leg 1 and the pedal 32 and the rear leg can be lifted after the connection.
  • the connection strength between 2 ensures the safety of the use of the pedals 31, 32.
  • the hook piece 11 is provided with two 90-degree bent portions 111.
  • the hook piece 21 is provided with two 90-degree bent portions 211, currently After the leg 1 and the rear leg 2 are axially inserted into each other by the respective hook pieces 11, 21, the front leg 1 and the rear leg 2 can only slide along the axial direction, and the radial front leg 1 It cannot be separated from each other with the hind legs 2. Since the hook pieces 11, 21 have two 90-degree bent portions 111, 211, there is substantially no displacement space between the front leg 1 and the rear leg 2 in the front-rear direction, and the leg tube of the structure is along the leg tube itself.
  • the pedals 31 and 32 are also connected between the two leg tubes, and the pedals 31 and 32 are connected. Then, the radial displacement of the ff1 direction between the front and rear legs 1 and 2 of the leg tube is limited.
  • the hooks 11 and 21 are hooked to each other to slide between the front leg 1 and the rear leg 2, thereby facilitating the realization of the telescopic function of the telescopic ladder.
  • the cross-sectional shape of the front leg 1 and the rear leg 2 is rectangular, so that the mutual sliding between the front leg 1 and the rear leg 2 can be facilitated, thereby realizing the expansion and contraction of the ladder.
  • the tube walls on both sides of the front leg 1 and the rear leg 2 are respectively provided with notches 12 and 22 which can be used for restricting the pedal turning, and the notches 12 and 22 are used for the pedal 31,
  • the end edge of the 32, the end edge of the pedals 31, 32 is engaged with the notch 12 of the front leg or the notch 22 of the rear leg, which facilitates the mounting of the pedals 31, 32 and prevents the pedals 31, 32 from being Flip.
  • the rear leg 2 can be constructed by rotating the front leg 1 by 180 degrees around the axis, so that the front leg 1 and the rear leg 2 can be constructed using a mold, but only In use, the tubular member of the same leg structure of the front leg 1 is rotated 180 degrees around the axis to constitute the rear leg 2.
  • the ladder needs to have two leg tubes 10, 20, usually two leg tubes 10, 20 Is symmetrical, therefore, after the front leg 1 of the first leg tube 10 is made, the rear leg 2 of the first leg tube 10 is rotated 180 degrees around the axis of the front leg 1 of the first leg tube 10, second The front leg 1 of the leg tube 20 is formed by inverting the front leg of the first leg tube 10 by 180 degrees in the longitudinal direction. Similarly, the rear leg of the second leg tube 20 is centered on the axis by the front leg of the second leg tube 20. Rotate 180 degrees to form.
  • the required pedal 31 is coupled between the front leg 1 of the first leg tube 10 and the front leg 1 of the second leg tube 20 to form a front ladder, and the rear leg 2 and the second leg tube of the first leg tube 10 are formed.
  • the rear leg 2 of the 20 is also coupled with the required pedal 32 to form a rear ladder, and then the front ladder and the rear
  • the ladders are nested between the first and second legs of the first leg tube 10, and between the front leg 1 and the rear leg 2, and between the front leg and the rear leg of the second leg tube 20.
  • a positioning mechanism 33 is further disposed between the front ladder and the rear ladder. The positioning mechanism 33 is mounted on the front ladder.
  • the positioning mechanism 33 includes a spring 331 and a card 332.
  • the card 332 can be stuck on the rear ladder by the tension of the spring 331.
  • On the pedal 32 since the bayonet of the card 332 is downward, when the front ladder moves upward, the bayonet of the card 332 does not limit the upward movement, when the bayonet of the card 332 is stuck at a certain height.
  • the pedal 32 of the rear ladder is on the pedal 32, the bayonet of the card 332 is stuck on the pedal 32, which defines the downward movement of the front ladder, and the bayonet of the card 332 cooperates with the pedal 32 of the rear ladder of different heights to make the front ladder Extending at different height positions, thus also achieving different heights of the adjustment ladder.
  • the card 332 When the front ladder is required to be retracted, the card 332 is pulled away from the pedal 32, and the front ladder and the rear ladder can be moved to each other. As long as the pulling of the card 332 is not released, the card 332 cannot be realized. It is engaged with the pedal 32 of the rear ladder. Therefore, the front ladder can be moved downward until it reaches the required position or is retracted to the original position. After the movement is in place, the pulling of the card 332 is released, and the card 332 is in the spring 331. Under the action of the pedal 32, the pedal of the other height or the pedal of the original position is locked, and the front ladder is limited to move downward.
  • the leg tube structure of the retractable ladder comprises a front leg and a rear leg which are juxtaposed in parallel, and the front leg and the rear leg are long strip-shaped hollow tubular bodies integrally formed of a metal material, and the design is reasonable and the production is reasonable. It is easy to process, easy to use, and has good industrial applicability.

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

Description

一种可伸缩梯子的腿管结构 技术领域
本发明属于日常生活用品领域， 特别是涉及一种可伸缩梯子的腿管结构。 背景技术
梯子是一种主要用于登髙取放物品的工具， 被广泛地使用在各种不同的场 合，特别是可伸缩的梯子， 由于其髙度可调节， 更是受到人们的青睐。现有技术 的一种可伸缩的梯子，包括二可伸缩的腿管、联接在二可伸缩腿管之间的若干踏 板以及实现腿管伸缩定位的定位结构，其中可伸缩的腿管为可相互滑动的内、外 腿结构， 由两个内腿以及内腿之间联接的若干踏板构成内梯， 由两个外腿以及外 腿之间联接的若干踏板构成外梯， 内、外腿由金属材料一体成型制作而成， 比如 用铝材料等， 内腿为管件， 外腿则是采用管件沿轴向设一条通透的开口而构成， 外腿的开口内的管腔可容纳内腿，这种结构的腿管，实际上是由外腿的开口内的 管腔提供一条沿轴向的滑道， 内腿则可以在外腿的开口内的管腔中沿轴向滑动， 从而使内腿相对于外腿伸缩而达到实现梯子伸縮的目的，伸缩时，整个内梯沿轴 向在外腿的管腔内滑动， 伸缩后的内、 外梯通过相互之间的定位结构实现定位。 这种内、外腿管相套接而可滑动的结构所构成的梯子，虽然能实现梯子的伸缩功 能，但仍存在着如下的弊端：一是由于外腿需要设有开口，从截面上看外腿腿管 的管壁无法实现封闭， 因此，外腿腿管的强度便大大降低， 而为了保证腿管的强 度，通常是将外腿的腿管管壁加厚， 这样， 就需要用去更多的材料， 金属材料通 常都较为昂贵，就会由于使用较多的材料而引起制作成本的上升，影响产品的竞 争力;二是由于内腿腿管和外腿腿管的结构及其大小不相同，因而成型时就需要 有两种分别制作内腿和外腿的模具，从而给产品的制作增添了难度；三是由于外 腿内套有内腿,其踏板就不能实现联接在两管壁上,而只能与外腿的单壁相联接， 致使踏板与外腿之间的连接强度不高，从而影响了踏板使用的安全性； 四是由于 内梯整体在外腿的管腔内滑动，当内腿安装稍有偏差时，就很容易影响内腿的滑 动自如， 从而影响伸缩梯子伸缩功能的实现。
发明内容
本发明的目的在于克服现有技术之不足， 提供一种可伸缩梯子的腿管结构，
1
确认本 釆用将原来相套的内外腿结构改为并列的前后腿结构， 且前后腿之间钩扣相套， 这样，既可以保证前后腿管在符合强度要求的前提下减少材料的使用量进而降低 制作成本， 又可以使前后腿管之间滑动自如，而且，还可以实现将踏板连接在腿 管的两壁上，从而大大提高踏板与腿管之间的连接强度，保证踏板使用的安全性， 特别是前后腿管可实现相同结构特征， 大大方便了腿管的制作加工。
本发明解决其技术问题所釆用的技术方案是： 一种可伸缩梯子的腿管结构， 包括相并列的前腿和后腿，前腿、后腿均为金属材料一体成型制作而成的长条状 中空管形体，前腿的管壁一体向后延伸设有弯折的扣钩片，后腿的管壁一体向前 延伸设有可对应配合的弯折的扣钩片，前腿与后腿之间通过各自的扣钩片沿轴向 相互套入构成可沿轴向相互滑动而沿径向相互定位的腿管结构。
所述的前腿、 后腿为铝材料一体成型制作而成的长条状中空管形体。
所述的扣钩片设有二个 90度的弯折部。
所述的前腿、 后腿的截面形状为矩形。
所述的前腿、 后腿的两侧管壁分别设有可用于限制踏板翻转的凹口。
所述的后腿由前腿以轴线为中心旋转 180度构成。
本发明的可伸缩梯子的腿管结构， 釆用前腿、后腿结构， 且利用前腿、后腿 延伸的扣钩片钩靠在一起，一方面， 从截面上看无论是前腿还是后腿， 其管壁均 可以做成封闭的形状， 因此， 前、后腿管的结构强度便大大提高， 前、后腿管的 管壁便无须加厚， 使得材料使用量减少，进而降低制作成本， 提髙了产品的竞争 力。另一方面， 这种并列的前、后腿结构， 使得构成梯子的两前腿之间的踏板和 构成梯子的两后腿之间的踏板，均可以实现连接在两管壁上,而不是单壁相联接， 这样， 就可以提髙踏板与腿管之间的连接强度， 保证了踏板使用的安全性。
本发明的可伸缩梯子的腿管结构， 扣钩片设有二个 90度的弯折部即可， 当 前腿与后腿之间通过各自的扣钩片沿轴向相互套入后，前腿与后腿之间就仅能沿 轴向相互滑动，而沿径向前腿与后腿之间是不能相互脱开的。由于扣钩片有二个 90度的弯折部， 使前腿与后腿之间沿前后向基本没有位移空间， 该结构的腿管， 就腿管本身而沿，前腿与后腿之间沿侧向还可有一定的位移空间，但是， 作为梯 子使用的腿管，在两个腿管之间还接有踏板， 由踏板则限定了腿管的前、后腿之 间无法进行侧向的径向位移。而这种扣钩片之间的相互钩靠，使前腿、后腿之间 滑动自如， 便于伸缩梯子伸缩功能的实现。
本发明的可伸缩梯子的腿管结构，前腿、后腿的截面形状采用矩形为最优方 案， 这样， 可便于前腿、 后腿之间的相互滑动， 从而实现梯子的伸缩。
本发明的可伸缩梯子的腿管结构，在前腿、后腿的两侧管壁分别设有可用于 限制踏板翻转的凹口，凹口用于配合踏板的端缘， 由踏板的端缘与前腿或后腿的 凹口形成相卡作用， 这样既便于踏板的安装， 又可以防止踏板的翻转。
本发明的可伸缩梯子的腿管结构， 后腿由前腿以轴线为中心旋转 180度构 成， 这样， 前腿和后腿在结构上就可以使用一个模具制作出来， 只不过使用时， 将前腿同种结构的管件以轴线为中心旋转 180度即构成后腿，更进一步来说，梯 子需要有二个腿管，通常两个腿管都是对称的，因此，第一腿管的前腿制作好后, 第一腿管的后腿就由第一腿管的前腿以轴线为中心旋转 180度构成，第二腿管的 前腿则由第一腿管的前腿沿长度方向翻转 180度构成， 同理，第二腿管的后腿则 由第二腿管的前腿以轴线为中心旋转 180度构成。制作时，在第一腿管的前腿与 第二腿管的前腿之间联接好需要的踏板构成前梯，在第一腿管的后腿与第二腿管 的后腿之间也联接好需要的踏板构成后梯，然后将前梯与后梯之间沿着相对应的 扣钩片相互套入，使第一腿管的前腿与后腿之间以及第二腿管的前腿与后腿之间 构成可沿轴向相互滑动而沿径向相互定位的结构。
本发明的有益效果是， 由于采用了相并列的前腿和后腿，且前腿的管壁一体 向后延伸设有弯折的扣钩片，后腿的管壁一体向前延伸设有可对应配合的弯折的 扣钩片，前腿与后腿之间通过各自的扣钩片沿轴向相互套入构成可沿轴向相互滑 动而沿径向相互定位的腿管结构，既可以保证前后腿管在符合强度要求的前提下 减少材料的使用量进而降低制作成本， 又可以使前后腿管之间滑动自如， 而且， 还可以实现将踏板连接在腿管的两壁上，从而大大提高踏板与腿管之间的连接强 度， 保证踏板使用的安全性 ·， 由于采用了后腿可以由前腿以轴线为中心旋转 180 度构成，大大方便了产品的制作和降低了产品的制作成本，从而提高了产品的竞 争力。
附图说明
以下结合附图及实施例对本发明作进一步详细说明；但本发明的一种可伸缩 梯子的腿管结构不局限于实施例。 图 1是本发明的截面构造示意图；
图 2是本发明用于踏板连接处的截面构造示意图；
图 3是可伸缩梯子的主视图；
图 4是可伸缩梯子的侧视图；
图 5是可伸缩梯子（伸长状态） 的主视图；
图 6是可伸缩梯子（伸长状态） 的侧视图；
图 7是沿图 6中 A— A线的剖视图；
图 8是图 6中 B部的剖视放大图。
具体实施方式
参见附图所示， 本发明的一种可伸缩梯子的腿管结构， 包括相并列的前腿 1 和后腿 2, 前腿 1、 后腿 2均为铝材料一体成型制作而成的长条状中空管形体， 前腿的管壁一体向后延伸设有弯折的扣钩片 11， 后腿的管壁一体向前延伸设有 可对应配合的弯折的扣钩片 21， 前腿 1与后腿 2之间通过各自的扣钩片 11、 21 沿轴向相互套入构成可沿轴向相互滑动而沿径向相互定位的腿管结构。
其中， 扣钩片 11设有二个 90度的弯折部 111， 扣钩片 21设有二个 90度的 弯折部 211; 前腿 1的截面形状为矩形， 后腿 2的截面形状为矩形； 前腿 1两侧 管壁分别设有可用于限制踏板翻转的凹口 12, 后腿 1的两侧管壁也分别设有可 用于限制踏板翻转的凹口 22; 后腿 2由前腿 1以轴线为中心旋转 180度构成。
本发明的可伸缩梯子的腿管结构，采用前腿 1、后腿 2结构， 且利用前腿 1、 后腿 2延伸的扣钩片 11、 21钩靠在一起， 一方面， 从截面上看无论是前腿 1还 是后腿 2， 其管壁均可以做成封闭的形状， 因此， 前、 后腿管 1、 2的结构强度 便大大提髙， 前、 后腿管 1、 2的管壁便无须加厚， 使得材料使用量减少， 进而 降低制作成本， 提高了产品的竞争力。 另一方面， 这种并列的前、 后腿 1、 2结 构， 使得构成梯子的两前腿之间的踏板 31和构成梯子的两后腿之间的踏板 32， 均可以实现连接在两管壁上， 而不是单壁相联接， 前腿 1与踏板 31相连接以及 后腿 2与踏板 32相连接时， 可以采用一螺钉穿过前腿 1或后腿 2的两管壁与踏 板 31或踏板 32锁接在一起， 也可以如本实施例中图 4、 图 7所示， 在前腿 1与 踏板 31的连接处设有连接孔 13, 用于实现与踏板 31的连接， 在后腿 2与踏板 32的连接处设有连接孔 23, 用于实现与踏板 32的连接， 而前腿 1的连接孔 13 和后腿 2的连接孔 23均可以为采用铝材料一体成型制作成长条状中空管形体后 再开孔，这样连接后，可以提髙踏板 31与前腿 1之间以及踏板 32与后腿 2之间 的连接强度， 保证了踏板 31、 32使用的安全性。
本发明的可伸缩梯子的腿管结构， 扣钩片 11设有二个 90度的弯折部 111 即可， 同样， 扣钩片 21设有二个 90度的弯折部 211即可， 当前腿 1与后腿 2 之间通过各自的扣钩片 11、 21沿轴向相互套入后， 前腿 1与后腿 2之间就仅能 沿轴向相互滑动，而沿径向前腿 1与后腿 2之间是不能相互脱开的。由于扣钩片 11、 21有二个 90度的弯折部 111、 211,使前腿 1与后腿 2之间沿前后向基本没 有位移空间， 该结构的腿管，就腿管本身而沿，前腿 1与后腿 2之间沿侧向还可 有一定的位移空间， 但是， 作为梯子使用的腿管， 在两个腿管之间还接有踏板 31、 32, 由踏板 31、 32则限定了腿管的前、 后腿 1、 2之间无法进行 ffl向的径向 位移。而这种扣钩片 11、 21之间的相互钩靠， 使前腿 1、 后腿 2之间滑动自如， 便于伸縮梯子伸缩功能的实现。
本发明的可伸缩梯子的腿管结构， 前腿 1、 后腿 2的截面形状采用矩形， 这 样， 可便于前腿 1、 后腿 2之间的相互滑动， 从而实现梯子的伸缩。
本发明的可伸缩梯子的腿管结构， 在前腿 1、后腿 2的两侧管壁分别设有可 用于限制踏板翻转的凹口 12、 22， 凹口 12、 22用于配合踏板 31、 32的端缘， 由踏板 31、 32的端缘与前腿的凹口 12或后腿的凹口 22形成相卡作用， 这样既 便于踏板 31、 32的安装， 又可以防止踏板 31、 32的翻转。
本发明的可伸缩梯子的腿管结构， 后腿 2可以由前腿 1 以轴线为中心旋转 180度构成， 这样， 前腿 1和后腿 2在结构上就可以使用一个模具制作出来， 只 不过使用时， 将前腿 1同种结构的管件以轴线为中心旋转 180度即构成后腿 2， 更进一步来说，梯子需要有二个腿管 10、 20,通常两个腿管 10、 20都是对称的， 因此， 第一腿管 10的前腿 1制作好后， 第一腿管 10的后腿 2就由第一腿管 10 的前腿 1以轴线为中心旋转 180度构成，第二腿管 20的前腿 1则由第一腿管 10 的前腿沿长度方向翻转 180度构成， 同理，第二腿管 20的后腿则由第二腿管 20 的前腿以轴线为中心旋转 180度构成。 制作时， 在第一腿管 10的前腿 1与第二 腿管 20的前腿 1之间联接好需要的踏板 31构成前梯， 在第一腿管 10的后腿 2 与第二腿管 20的后腿 2之间也联接好需要的踏板 32构成后梯，然后将前梯与后 梯之间沿着相对应的扣钩片 11、 21相互套入， 使第一腿管 10的前腿 1与后腿 2 之间以及第二腿管 20的前腿与后腿之间构成可沿轴向相互滑动而沿径向相互定 位的结构。在前梯与后梯之间还装有定位机构 33,该定位机构 33是装在前梯上， 定位机构 33包括弹簧 331、卡片 332，卡片 332利用弹簧 331的张紧力可以卡在 后梯的踏板 32上， 由于卡片 332的卡口是向下的， 因此， 前梯向上移动时， 卡 片 332的卡口不会起限定上移的作用，当卡片 332的卡口卡在某一高度的后梯的 踏板 32上时，卡片 332的卡口卡在踏板 32上， 限定了前梯的下移的动作，通过 卡片 332的卡口与不同高度的后梯的踏板 32相配合， 使前梯伸出在不同的高度 位置， 因而也实现了调节梯子的不同高度。 当需要向下收回前梯时， 将卡片 332 拉离对踏板 32的卡置， 则前梯与后梯之间又可以相互移动， 只要不松开对卡片 332的拉动， 则卡片 332就无法实现与后梯的踏板 32相卡置， 因而， 前梯可以 一直向下移动，直到到达需要的位置或是收回到原始位置，移动到位后，松开对 卡片 332的拉动， 则卡片 332在弹簧 331的作用下， 又对另一高度的踏板 32或 是原始位置的踏板进行卡置， 前梯又被限定向下移动。
- 上述实施例仅用来进一步说明本发明的可伸缩梯子的腿管结构，但本发明并 不局限于实施例， 凡是依据本发明的技术实质对以上实施例所作的任何简单修 改、 等同变化与修饰， 均落入本发明技术方案的保护范围内。
工业实用性
本发明一种可伸缩梯子的腿管结构，包括相并列的前腿和后腿，前腿、后腿 均为金属材料一体成型制作而成的长条状中空管形体，其设计合理、生产加工简 单、 使用方便， 具有良好的工业实用性。

Claims

权 利 要 求
1. 一种可伸缩梯子的腿管结构， 其特征在于： 包括相并列的前腿和后腿， 前腿、后腿均为金属材料一体成型制作而成的长条状中空管形体，前腿的管壁一 体向后延伸设有弯折的扣钩片，后腿的管壁一体向前延伸设有可对应配合的弯折 的扣钩片，前腿与后腿之间通过各自的扣钩片沿轴向相互套入构成可沿轴向相互 滑动而沿径向相互定位的腿管结构。
2. 根据权利要求 1所述的一种可伸缩梯子的腿管结构， 其特征在于： 所述 的前腿、 后腿为铝合金材料一体成型制作而成的长条状中空管形体。
3. 根据权利要求 1所述的一种可伸缩梯子的腿管结构， 其特征在于： 所述 的扣钩片设有二个 90度的弯折部。
4. 根据权利要求 1所述的一种可伸缩梯子的腿管结构， 其特征在于： 所述 的前腿、 后腿的截面形状为矩形。
5. 根据权利要求 1所述的一种可伸缩梯子的腿管结构， 其特征在于： 所述 的前腿、 后腿的两侧管壁分别设有可用于限制踏板翻转的凹口。
6. 根据权利要求 1所述的一种可伸缩梯子的腿管结构， 其特征在于： 所述 的后腿与前腿可以由相同的模具制成，后腿由前腿以轴线为中心旋转 180度构成 其连接结构。
PCT/CN2007/001944 2006-06-20 2007-06-20 Structure de montant pour une échelle coulissante WO2008000161A1 (fr)

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GB1457149A (en) * 1973-12-19 1976-12-01 Gravity Aluminium Pty Ltd Ladder
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