JPS63185794A - Step for passenger conveyor - Google Patents
Step for passenger conveyorInfo
- Publication number
- JPS63185794A JPS63185794A JP1363287A JP1363287A JPS63185794A JP S63185794 A JPS63185794 A JP S63185794A JP 1363287 A JP1363287 A JP 1363287A JP 1363287 A JP1363287 A JP 1363287A JP S63185794 A JPS63185794 A JP S63185794A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- step shaft
- passenger conveyor
- steps
- clamping plate
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
Landscapes
- Escalators And Moving Walkways (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明はエスカレータ、移動歩道等の乗客コンベアに
用いられる踏段に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to steps used on passenger conveyors such as escalators and moving walkways.
口従来の技術］
第５図及び第６図は従来の乗客コンベアの踏段を示す図
で、第５図は縦断側面図、第６図はエスカレータの全体
側面図である。[Background Art] Figs. 5 and 6 are views showing the steps of a conventional passenger conveyor, with Fig. 5 being a vertical side view and Fig. 6 being an overall side view of the escalator.
図中、（１）は踏段、（２）は踏段（１）の骨格を形成
する枠体、（３）は枠体（２）の上面に装着された踏板
、（４）は枠体（２）の一端に枢持された車輪、（５）
は枠体（２）を横切る方向に配置された踏段軸で、この
踏段軸（５）は枠体（２）の両側に無端状に配置された
踏段鎖（後述）に結合されている。（６）は枠体（２）
に踏段軸（５）を枢持締結する支持具で、一端が枠体（
２）に枢着され踏段軸（５）を支持する受具（７）と受
具（７）を枠体（２）に締結するボルト（８）からなっ
ている。（９）は踏段軸（５）の両端に装着された車輪
である。In the figure, (1) is a step, (2) is a frame forming the skeleton of the step (1), (3) is a tread attached to the top surface of the frame (2), and (4) is a frame (2). ) a wheel pivoted at one end, (5)
is a step shaft arranged in a direction across the frame (2), and this step shaft (5) is connected to step chains (described later) arranged endlessly on both sides of the frame (2). (6) is the frame (2)
A support for pivoting and fastening the step shaft (5) to the frame body (
It consists of a bracket (7) which is pivotally connected to the step shaft (2) and supports the step shaft (5), and a bolt (8) which fastens the bracket (7) to the frame (2). (9) are wheels attached to both ends of the step shaft (5).
従来の乗客コンベヤの踏段は上記のように構成され、電
動機（図示しない）により踏段鎖が駆動されると、これ
に結合されている踏段軸（５）は移動し、車軸（４）（
９）はそれぞれ踏段レール（後述）に案内さ゛れて移動
する。このようにして、隣接する多数の踏段（１）は無
端状に配置され、第６図に示すように往路側は欄干（１
０）の間の傾斜部（１１）を移動し、帰路側はトラス（
１２）の上部（１２Ａ）及び下部（１２Ｂ）で反転して
トラス（１２）内を通過し、再び欄干（１０）の間に戻
って来る。The steps of a conventional passenger conveyor are constructed as described above, and when the step chain is driven by an electric motor (not shown), the step shaft (5) connected thereto moves and the axle (4) (
9) respectively move while being guided by step rails (described later). In this way, a large number of adjacent steps (1) are arranged in an endless manner, and as shown in FIG.
0) on the slope (11), and the return side is a truss (
The upper part (12A) and lower part (12B) of 12) are reversed, pass through the truss (12), and return again between the parapets (10).
踏段（１）を踏段軸（５）から取り外す場合は、第６図
に示すように、該当する踏段（１）をトラス（１２）の
上部（１２Ａ）又は下部（１２Ｂ）で停止させる。この
踏段（１）列の反転部では、隣接する踏段（１）の相互
間が開離して、踏段（１）間に隙間Ａが生じる。この隙
間Ａを利用してボルト（８）を外す。その後１手巻き又
は電動で踏段（１）列を移動させ、該当する踏段（１）
を傾斜部（１１）に持って来る。このとき、受具（７）
は自重で下方へ回動し、枠体（２）は踏段軸（５）に載
置された状態になっているので、踏段（１）を上方へ持
ち上げれば、踏段（１）は踏段軸（５）から取り外すこ
とができる。踏段（１）を踏段軸（５）に装着する場合
は上記と逆の操作となる。When removing the step (1) from the step shaft (5), as shown in FIG. 6, the relevant step (1) is stopped at the upper part (12A) or lower part (12B) of the truss (12). At the inverted portion of the row of steps (1), adjacent steps (1) are separated from each other, creating a gap A between the steps (1). Using this gap A, remove the bolt (8). Then, move the row of steps (1) manually or electrically, and move the row of steps (1) to the corresponding step (1).
and bring it to the inclined part (11). At this time, the receiver (7)
rotates downward under its own weight, and the frame (2) is placed on the step shaft (5), so if you lift the step (1) upward, the step (1) will move onto the step shaft. It can be removed from (5). When attaching the step (1) to the step shaft (5), the operation is the reverse of the above.
しかし、踏段（１）を取り外すには、いったん上部（１
２Ａ）又は下部（１２Ｂ）でボルトを外した後、傾斜部
（１１）まで移動させる手間を要する。そこで、これを
改良して、上部（１２Ａ）又は下部（１２Ｂ）で作業す
ることなく、直ちに傾斜部（１１）で踏段（１）が取り
外せるようにしたものもある。However, in order to remove the step (1), first
2A) or the lower part (12B), it takes time and effort to move it to the inclined part (11). Therefore, there is an improved version that allows the step (1) to be immediately removed from the slope (11) without having to work on the upper part (12A) or the lower part (12B).
第７図及び第８図は、例えば特公昭５４−２５３１５号
公報に示された乗客コンベヤの踏段を示す図で、第７図
は縦断側面図、第８図は要部側面図である。7 and 8 are views showing steps of a passenger conveyor disclosed in, for example, Japanese Patent Publication No. 54-25315, with FIG. 7 being a longitudinal side view and FIG. 8 being a side view of the main part.
この例では、枠体（２）の他端にほぼＵ字状の受具（１
５）が枢着されており、受具（１５）は半円状の中央部
（１５ａ）と、中央部（１５ａ）から延長した延長端部
（１５ｂ）と、中央部（１５ａ）から外方へ屈曲した締
結端部（１５ｃ）からなっている。（１６）は受具（１
５）の締結端部（１５ｃ）を枠体（２）の他端に締結す
るねじ、（１７）は踏板（３）を貫通する穴（３ａ）を
通じてねじ（１６）を回転させる工具である。In this example, a substantially U-shaped receiver (1) is attached to the other end of the frame (2).
5) are pivotally connected, and the receiver (15) has a semicircular center part (15a), an extended end part (15b) extending from the center part (15a), and an outer part extending from the center part (15a). It consists of a fastening end (15c) that is bent to. (16) is the receiver (1
5) is a screw that fastens the fastening end (15c) to the other end of the frame (2), and (17) is a tool that rotates the screw (16) through the hole (3a) passing through the footboard (3).
踏段（１）を踏段軸（５）から取り外す場合は、踏段（
１）を傾斜部（１１）に置いた状態で、踏段（３）の上
面から作業ができる。すなわち第７図に示すような状態
で、工具（１７）を踏板（３）の穴（３ａ）から挿入し
、ねじ（１６）の頭部に係合させ、これを回転してねじ
（１６）を緩める。これで、受具（１５）と枠体（２）
との結合は解除さ些るので、踏段（１）を車輪（４）の
軸を中心にして曲線（１８）に沿って上方へ回動させる
と、第８図に示すように受具（１５）は回動して踏段軸
（５）から外れる。また、踏段（１）を踏段軸（５）に
結合させる場合は上述と逆の動作となり、第８図の状態
から踏段（１）を下方へ回動させることになる。このと
き、受具（１５）の延長端部（１５ｂ）は踏段軸（５）
に当接して回動し、踏段（１）の回動に伴って第７図の
ようになる。これで、工具（１７）によりねじ（１６）
を締結端部（１５ｃ）に締結すれば、踏段（１）は踏段
軸（５）に結合される。When removing the step (1) from the step shaft (5), remove the step (
1) is placed on the slope (11), work can be done from the top of the step (3). That is, in the state shown in Fig. 7, insert the tool (17) through the hole (3a) of the treadle (3), engage it with the head of the screw (16), and rotate it to remove the screw (16). loosen. Now the receiver (15) and frame (2)
Since the connection with the holder (15) is released, when the step (1) is rotated upward along the curve (18) around the axis of the wheel (4), the connection with the support (15) is released as shown in Figure 8. ) rotates and comes off the step shaft (5). Further, when the step (1) is coupled to the step shaft (5), the operation is reverse to that described above, and the step (1) is rotated downward from the state shown in FIG. 8. At this time, the extended end (15b) of the support (15) is connected to the step shaft (5).
The step (1) rotates as shown in Fig. 7 as the step (1) rotates. Now, use the tool (17) to tighten the screw (16).
When the step (1) is fastened to the fastening end (15c), the step (1) is connected to the step shaft (5).
［発明が解決しようとする問題点］
第７図及び第８図のような従来の乗客コンベヤの踏段で
は、踏板（３）に穿設された穴（３ａ）を通してねじ（
１６）を操作しているため、踏板（３）に穴（３ａ）を
加工する必要があり費用が増大すると共に、外観を損い
、特に踏段（１）の下方に照明装置を設置して照明する
場合に穴（３ａ）の存在が目立つという問題点がある。[Problems to be Solved by the Invention] In conventional passenger conveyor steps as shown in FIGS. 7 and 8, screws (
16), it is necessary to make holes (3a) in the treads (3), which increases costs and spoils the appearance. In this case, there is a problem that the presence of the hole (3a) becomes conspicuous.
この発明は上記問題点を解決するためになされたもので
、踏段列の反転部でボルトを緩めたり、踏板に穴を設け
たりすることなく、踏段の往路側で、容易に踏段を踏段
軸に着脱できるようにした乗客コンベヤの踏段を提供す
ることを目的とする。This invention was made to solve the above problem, and it is possible to easily attach the step to the step axis on the outgoing side of the step without loosening bolts at the inverted part of the step row or making holes in the tread. It is an object of the present invention to provide steps for a passenger conveyor that can be attached and detached.
また、この発明の別の発明は、上記目的に加えて更に信
頼性の高い保持機能を持たせることができるようにした
乗客コンベヤの踏段を提供することを目的とする。Another object of the present invention is to provide a step for a passenger conveyor that can have a more reliable holding function in addition to the above object.
［問題点を解決するための手段］
この発明に係る乗客コンベヤの踏段は、板ばねで形成さ
れその後端部が踏段の下面に固定され先端部が踏段軸の
方へ突出してこれを挟持する挟持板を設けたものである
。[Means for Solving the Problems] The step of the passenger conveyor according to the present invention is formed of a leaf spring, the rear end of which is fixed to the lower surface of the step, and the tip of which protrudes toward the step shaft. It is equipped with a board.
また、この発明の別の発明は、上記のものにおいて踏段
に踏段軸を枢持締結する支持具を設けたものである。Another aspect of the present invention is that the step is provided with a support for pivoting and fastening the step shaft to the step.
［作 用］
この発明においては、踏段下面の挟持板を踏段軸に押圧
し、又は踏段軸から引き抜くことにより、踏段と踏段軸
とは結集又は分離される。[Function] In this invention, the step and the step shaft are brought together or separated by pressing the clamping plate on the lower surface of the step against the step shaft or pulling it out from the step shaft.
また、この発明の別の発明においては、踏段と踏段軸と
は挟持板と支持具とで二重に結合され、支持具の締結不
十分に対しては挟持板が支持する。Further, in another aspect of the present invention, the step and the step shaft are doubly connected by a clamping plate and a support, and the clamping plate provides support when the support is insufficiently fastened.
［実施例］
第１図〜第４図はこの発明の一実施例を示す図で、第１
図は縦断側面図、第２図は第１図を右方から見た図、第
３図は踏段の取付側面図、第４図は挟持板の動作説明図
で、従来装置と同−又は相当部分は同一符号で示す。[Example] Figures 1 to 4 are diagrams showing an example of the present invention.
The figure is a longitudinal side view, Figure 2 is a view of Figure 1 seen from the right, Figure 3 is a side view of the step installation, and Figure 4 is an explanatory diagram of the operation of the clamping plate, which is the same as or equivalent to the conventional device. Parts are indicated by the same reference numerals.
図中、 （２１）は板ばねで形成され後端部（２１ａ）
。In the figure, (21) is formed by a leaf spring, and the rear end (21a)
.
中間部（２１ｂ）及び先端部（２１ｃ）からなる挟持板
で、中間部（２１ｂ）は踏段軸（５）の外周に沿って湾
曲されている。（２２）は同じく後端部（２２ａ）、中
間部（２２ｂ）及び先端部（２２ｃ）からなる挟持板で
、これらの後端部（２１ａ） （２２ａ）は重合されて
ボルド（２３）で枠体（２）に締結され、中間部（２１
ｂ） （２２ｂ）で踏段軸（５）を挟持し、先端部（２
１ｃ） （２２ｃ）は互いに外方へ湾曲拡張されている
。（２４）は無端状に形成され各踏段（１）の踏段軸（
５）を結合する踏段鎖、（２５） （２６）はそれぞれ
車輪（９）（４）を案内する踏段レールである。The holding plate is composed of an intermediate part (21b) and a tip part (21c), and the intermediate part (21b) is curved along the outer periphery of the step shaft (5). (22) is a clamping plate which also consists of a rear end part (22a), a middle part (22b) and a tip part (22c), and these rear end parts (21a) and (22a) are overlapped and framed by a bolt (23). It is fastened to the body (2) and the middle part (21
b) Hold the step shaft (5) with (22b) and
1c) (22c) are curved and expanded outward from each other. (24) is formed in an endless shape, and the step shaft (24) of each step (1) is
5), and (25) and (26) are step rails that guide the wheels (9) and (4), respectively.
上記のように構成された乗客コンベヤの踏段においては
踏段（１）が正規位置にあるときは、その中間部（２１
ｂ） （２２ｂ）は強固に踏段軸（５）を挟持している
。また、先端部（２１ｃ） （２２ｃ）はそれらの間を
踏段軸（５）が通過するに要する力が踏段（１）単体の
自重よりも大きく設定されている。したがって、踏段（
１）が上部（１２Ａ）及び下部（１２Ｂ）で反転すると
き、又は踏段（ｉ）が帰路側を通過するとき（踏板（３
）は枠体（２）の下側に来る）、挟持板（２１） （２
２）と踏段軸（５）の係合が外れることはない。また、
踏段（１）を踏段軸（５）から取り外す場合は、往路側
で挟持板（２１） （２２）の力に打ち勝つ力で踏段（
１）を引き上げれば、容易に取り外しができる。踏段（
１）を踏段軸（５）に装着する場合は上記の逆に操作す
ればよい。なお、挟持板（２１） （２２）の先端部（
２１ｃ） （２２ｃ）は踏段軸、（５）への挿入を容易
にすることは明らかである。これら着脱時の挟持板（２
１）（２２）の動作を第４図に示す。In the steps of the passenger conveyor configured as described above, when the steps (1) are in the normal position, the intermediate part (21
b) (22b) firmly holds the step shaft (5). Further, the force required for the step shaft (5) to pass between the tip portions (21c) and (22c) is set to be larger than the weight of the step (1) alone. Therefore, the steps (
1) is reversed at the upper part (12A) and lower part (12B), or when the step (i) passes on the return side (the step (3)
) is on the underside of the frame (2)), the clamping plate (21) (2
2) and the step shaft (5) never come out of engagement. Also,
When removing the step (1) from the step shaft (5), use the force that overcomes the force of the clamping plates (21) (22) on the outward side to remove the step (
It can be easily removed by pulling up 1). Steps (
When attaching 1) to the step axle (5), operate in the reverse order as described above. In addition, the tips of the clamping plates (21) (22) (
21c) It is clear that (22c) facilitates insertion into the step axle, (5). Holding plate (2) for attaching and detaching these
1) The operation of (22) is shown in FIG.
このように、踏段（１）の踏段軸（５）への着脱は往路
側で操作でき、かつ踏板（３）には従来装置と異なり穴
（３ａ）は加工されていないため、外観が損われること
はない。In this way, the step (1) can be attached to and removed from the step shaft (5) on the outbound side, and unlike conventional devices, the step (3) does not have a hole (3a) drilled in it, so the appearance is not affected. Never.
また、第１図の構成と第５図に示す支持具（６）を併用
することも可能であり、いっそう信頼性の高い保持機構
とすることができる。すなわち、ボルト（８）により締
結される支持具（６）に挟持板（２１）（２２）が協同
するため、万一ボルト（８）の締結を忘れても、踏段（
１）の脱落書が生じない安全な構成となる。また、保守
時上部（１うＡ）又は下部（１２Ｂ）で踏段（１）を外
し、誤って電動で逆転させ、該当する踏段（１）を帰路
側に移動させても、踏段（１）が脱落することはない。Furthermore, it is also possible to use the configuration shown in FIG. 1 and the support tool (6) shown in FIG. 5 in combination, resulting in an even more reliable holding mechanism. That is, since the clamping plates (21) and (22) cooperate with the support (6) that is fastened with the bolt (8), even if you forget to fasten the bolt (8), the step (
1) It is a safe configuration that does not cause omissions. In addition, even if you remove the step (1) at the upper part (1A) or the lower part (12B) during maintenance, accidentally reverse the step using the electric motor, and move the relevant step (1) to the return side, the step (1) will not work. It will not fall off.
［発明の効果］
以上説明したとおりこの発明では、板ばねで形成されそ
の後端部が踏段の下面に固定された挟持板で踏段軸を挟
持させたので、踏段の外観を損うことをなくすことがで
き、かつ踏段列の反転部でボルトを緩めたりすることな
く、往路側で容易に踏段を踏段軸に着脱することができ
る効果がある。[Effects of the Invention] As explained above, in this invention, the step shaft is held between the holding plates formed of leaf springs and whose rear ends are fixed to the bottom surface of the step, so that the appearance of the step is not impaired. This has the effect that the steps can be easily attached to and detached from the step shaft on the outbound side without loosening the bolts at the inverted part of the step row.
また、この発明の別の発゛明では、挟持板の外に踏段軸
を枢持締結支持具を設けたので、更に信頼性の高い保持
機能を持たせることができ、保守時踏段列の反転部で踏
段を外し、誤って逆転させても踏段の脱落が生じないよ
うにすることができる効果がある。In addition, in another invention of the present invention, since a fastening support for pivoting the step shaft is provided outside the clamping plate, a more reliable holding function can be provided, and the step row can be reversed during maintenance. This has the effect of preventing the step from falling off even if the step is removed at the end and reversed by mistake.
第１図〜第４図はこの発明による乗客コンベヤの踏段の
一実施例を示す図で、第１図は踏段の縦断側面図、第２
図は第１図を右方から見た図、第３図は踏段の取付側面
図、第４図は挟持板の動作説明図、第５図〜第８図は従
来の乗客コンベアの踏段を示す図で、第５図は踏段の縦
断側面図、第６図はエスカレータの全体側面図、第７図
は踏段の縦断側面図、第８図は第７図の要部側面図であ
る。
図中、（１）は踏段、（５）は踏段軸、（６）は支持具
、（２１）は挟持板、（２１ａ）は後端部、（２１ｃ）
は先端部、（２２）は挟持板、 （２２ａ）は後端部、
（２２ｃ）は先端部、（２３）はボルト、（２４）は
踏段鎖である。
なお、図中同一符号は同−或は相当部分を示す。1 to 4 are views showing an embodiment of steps for a passenger conveyor according to the present invention, FIG. 1 is a vertical side view of the steps, and FIG.
The figure is a view of Fig. 1 viewed from the right, Fig. 3 is a side view of the step installation, Fig. 4 is an explanatory diagram of the operation of the clamping plate, and Figs. 5 to 8 show the steps of a conventional passenger conveyor. 5 is a longitudinal side view of the steps, FIG. 6 is a side view of the entire escalator, FIG. 7 is a longitudinal side view of the steps, and FIG. 8 is a side view of the main part of FIG. 7. In the figure, (1) is the step, (5) is the step shaft, (6) is the support, (21) is the clamping plate, (21a) is the rear end, (21c)
is the tip, (22) is the clamping plate, (22a) is the rear end,
(22c) is the tip, (23) is the bolt, and (24) is the step chain. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (3)
踏段軸を有し、この踏段軸に踏段を配置したものにおい
て、板ばねで形成されその後端部が上記踏段の下面に固
定され先端部が上記踏段軸の方へ突出してこれを挾持す
る挟持板を備えたことを特徴とする乗客コンベアの踏段
。(1) A step shaft that is connected orthogonally to a step chain formed in an endless shape, and a step is arranged on this step shaft, which is formed of a leaf spring and whose rear end is fixed to the bottom surface of the step. A step for a passenger conveyor, characterized in that the step is provided with a clamping plate whose tip end protrudes toward the step shaft and clamps the step shaft.
範囲第１項記載の乗客コンベアの踏段。(2) A step for a passenger conveyor according to claim 1, wherein the tip of the clamping plate is curved and expanded outward.
踏段軸を有し、この踏段軸に踏段を配置したものにおい
て、板ばねで形成されその後端部が上記踏段の下面に固
定され先端部が上記踏段軸の方へ突出してこれを挟持す
る挟持板と、上記踏段軸を支持締結する支持具とを備え
たことを特徴とする乗客コンベアの踏段。(3) A step shaft that is orthogonally connected to an endless step chain, and a step is arranged on this step shaft, which is formed of a leaf spring and whose rear end is fixed to the bottom surface of the step. 1. A step for a passenger conveyor, comprising: a clamping plate whose distal end protrudes toward the step shaft and clamps the same; and a support for supporting and fastening the step shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1363287A JPS63185794A (en) | 1987-01-23 | 1987-01-23 | Step for passenger conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1363287A JPS63185794A (en) | 1987-01-23 | 1987-01-23 | Step for passenger conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63185794A true JPS63185794A (en) | 1988-08-01 |
Family
ID=11838610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1363287A Pending JPS63185794A (en) | 1987-01-23 | 1987-01-23 | Step for passenger conveyor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63185794A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002167154A (en) * | 2000-11-27 | 2002-06-11 | Otis Elevator Co | Shaft bearing structure for escalator step |
| JP2011190043A (en) * | 2010-03-15 | 2011-09-29 | Hitachi Ltd | Passenger conveyor |
| CN104016215A (en) * | 2014-06-24 | 2014-09-03 | 南通江中光电有限公司 | Sidewalk elevator footboard capable of adjusting planeness |
-
1987
- 1987-01-23 JP JP1363287A patent/JPS63185794A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002167154A (en) * | 2000-11-27 | 2002-06-11 | Otis Elevator Co | Shaft bearing structure for escalator step |
| JP2011190043A (en) * | 2010-03-15 | 2011-09-29 | Hitachi Ltd | Passenger conveyor |
| CN104016215A (en) * | 2014-06-24 | 2014-09-03 | 南通江中光电有限公司 | Sidewalk elevator footboard capable of adjusting planeness |
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