JP2743315B2 - Manhole ladder - Google Patents
Manhole ladderInfo
- Publication number
- JP2743315B2 JP2743315B2 JP7145132A JP14513295A JP2743315B2 JP 2743315 B2 JP2743315 B2 JP 2743315B2 JP 7145132 A JP7145132 A JP 7145132A JP 14513295 A JP14513295 A JP 14513295A JP 2743315 B2 JP2743315 B2 JP 2743315B2
- Authority
- JP
- Japan
- Prior art keywords
- ladder
- manhole
- horizontal
- worker
- bent
- 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.)
- Expired - Fee Related
Links
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Ladders (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、両側桁とその間を複数
の足掛け用横桟で連結して構成したマンホール用梯子に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole ladder constructed by connecting both side girders and a plurality of horizontal rails between them.
【０００２】[0002]
【従来の技術】従来の梯子においては、単に両側桁とそ
の間を複数の水平に直線状に配置した足掛け用横桟で連
結して梯子を構成していた。2. Description of the Related Art In a conventional ladder, a ladder is constructed by simply connecting both side girders and a plurality of horizontal rails arranged horizontally in a straight line between them.
【０００３】[0003]
【発明が解決しようとする課題】ところで、梯子をマン
ホールに配置して使用する場合に、マンホールの孔径は
限られたものであって、狭い空間が存在するのみである
ことから、該梯子を利用して作業員が昇降する際に、膝
が足掛け用横桟に当たって怪我をしたり、梯子を動揺さ
せたりして危険を感じることがある。When a ladder is used by placing it in a manhole, since the hole diameter of the manhole is limited and only a narrow space exists, the ladder is used. When the worker goes up and down, his knees may hit the cross rail for leg rest, causing injuries and upsetting the ladder, which may be dangerous.
【０００４】本発明は、従来の技術の有するこのような
問題点に鑑みてなされたものであり、その目的とすると
ころは、梯子の各横桟に外方に膨らませることにより、
昇降時に怪我をすることが少なく、安全で昇降し易いマ
ンホール用梯子とし、且つ梯子を折り曲げ可能にしてマ
ンホール開口の保全に使用できるようなマンホール用梯
子を提供しようとするものである。[0004] The present invention has been made in view of such problems of the prior art, and an object of the present invention is to inflate each ladder crosswise outwardly.
A manhole ladder that is safe and easy to ascend and descend with little injuries when ascending and descending .
Manhole ladder that can be used for preservation of hole opening
It is intended to provide a child .
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明におけるマンホール用梯子は、各横桟を中央
部を水平状態で外方へ湾曲させてその両端を両側桁に連
結し、且つ各側桁を２分割体で構成しこれをヒンジによ
り連結して前記湾曲方向と逆方向に折り曲げ可能にした
ことを特徴とするものである。In order to achieve the above-mentioned object, a manhole ladder according to the present invention is characterized in that each cross beam is curved outward at a center portion in a horizontal state, and both ends thereof are connected to both side girders , In addition, each side spar is constituted by a two-piece body, which is hinged.
In a direction opposite to the bending direction .
【０００６】[0006]
【作用】上記のように構成されたマンホール用梯子であ
るので、この梯子をマンホールの壁に沿って立設し、作
業員がこれを利用して昇降するのであるが、この昇降の
際に、横桟はその中央部が昇降者側から見て外方に湾曲
して膨らまされているので、狭いマンホールの中の昇降
動作でありながら、作業員は少しでも梯子に近付くこと
ができると共に、横桟の作業員側への突出がないので、
昇降時に作業員の膝が該横桟に当接することも少なく、
梯子を動揺させたりすることもない。また、梯子をマン
ホールの上端面付近で折り曲げると、該マンホールの上
端面が梯子で覆われる。Since the ladder for a manhole is constructed as described above, the ladder is erected along the wall of the manhole, and the worker moves up and down using the ladder. Since the center of the crosspiece is curved outward and inflated when viewed from the side of the elevator, the worker can approach the ladder as much as possible while moving up and down in a narrow manhole. Since there is no protrusion of the pier to the worker side,
Workers' knees are less likely to abut on the side rails when going up and down,
There is no upsetting of the ladder. Also mans the ladder
When bent near the upper end of the hole,
The end face is covered with a ladder .
【０００７】[0007]
【実施例】図１は本発明の一実施例に係るマンホール用
梯子の斜視図、図２はその要部の平面図、図３は折り曲
げ可能な状態をも示すマンホール用梯子の斜視図であ
る。1 is a perspective view of a manhole ladder according to an embodiment of the present invention, FIG. 2 is a plan view of a main part thereof, and FIG. 3 is a perspective view of a manhole ladder also showing a foldable state. .
【０００８】図において、１は側桁であり、足掛け用横
桟２の両側に位置しており、該両側桁１，１間には複数
の前記横桟２が水平状態に配置されている。そして、該
横桟２は、それぞれその中央部が昇降者側から見て外方
に湾曲して膨らまされており、その両端が前記側桁１に
それぞれ連結されている。そして、この湾曲の程度はマ
ンホール３の壁の曲面になるべく近い曲面となるように
するのがよい。In the figure, reference numeral 1 denotes a side beam, which is located on both sides of a foot rail 2 and a plurality of the horizontal beams 2 are horizontally arranged between the side beams 1, 1. Each of the horizontal rails 2 has a central portion curved outwardly when viewed from the side of the ascending and descending bulges, and both ends thereof are connected to the side girders 1, respectively. It is preferable that the degree of the curvature be a curved surface as close as possible to the curved surface of the wall of the manhole 3.
【０００９】そして、前記側桁１はその長手方向の途中
で２分割され、両分割体がヒンジ４によって前記湾曲方
向と逆方向に折り曲げ可能に連結されている。[0009] Then, the side girder 1 is divided into two in the middle of its longitudinal direction, the curved side two divided members is by a hinge 4
It is connected to be able to bend in the opposite direction .
【００１０】以上のような構成からなるマンホール用梯
子であるので、この梯子をマンホール３の壁に沿って立
設し、作業員がこれを利用して昇降するのであるが、こ
の昇降の際に、横桟２はその中央部が昇降者側から見て
外方に湾曲して膨らまされているので、狭いマンホール
の中の昇降動作でありながら、作業員は少しでも梯子に
近付くことができて昇降動作が容易となると共に、横桟
２の作業員側への突出がないので、昇降時に作業員の膝
が該横桟２に当接することも少なく、梯子を動揺させた
りすることもない。Since the ladder for a manhole having the above-described configuration is used, the ladder is erected along the wall of the manhole 3 and the worker uses the ladder to move up and down. Since the center part of the horizontal rail 2 is curved outward and expanded when viewed from the side of the elevator, the worker can approach the ladder a little while moving up and down in a narrow manhole. Since the lifting and lowering operation is facilitated and the lateral rail 2 does not protrude to the worker side, the worker's knees rarely come into contact with the horizontal rail 2 at the time of lifting and lowering, and the ladder is not shaken.
【００１１】また、上述のように、側桁１をその長手方
向の途中で２分割し、両分割体をヒンジ４によって折り
曲げ可能に連結したので、この梯子を図３に示すよう
に、マンホール３の上端面３１から僅かに突出するよう
に立設し、作業員の昇降を容易にすると共に、梯子の不
使用時には、該梯子を前記ヒンジ４の箇所で前記湾曲方
向と逆方向に折り曲げてマンホール３の上端面３１を覆
わせることにより、マンホール３に対する周囲の人の危
険防止にも役立つのである。Further, as described above , the side spar 1 is divided into two parts in the longitudinal direction thereof, and the two divided bodies are connected by the hinge 4 so as to be able to be bent, so that this ladder is connected to the manhole 3 as shown in FIG. erected so as to slightly protrude from the upper end surface 31 of the, as well as to facilitate lifting of the operator, at the time of non-use of the ladder, the curved side of該梯Ko in place of the hinge 4
By folding the manhole 3 in the opposite direction to cover the upper end surface 31 of the manhole 3, it also helps to prevent danger of surrounding people to the manhole 3.
【００１２】[0012]
【発明の効果】本発明に係る梯子によれば、各横桟を中
央部を水平状態で外方へ湾曲させてその両端を両側桁に
連結したので、作業員がこれを利用して昇降する際に狭
いマンホールの中の昇降動作でありながら、作業員は少
しでも梯子に近付くことができて昇降動作が容易となる
と共に、昇降時に作業員の膝が該横桟に当接することも
少なく、梯子を動揺させたりすることも少ない安全なマ
ンホール用梯子となる。さらに、側桁をその長手方向の
途中で２分割し、両分割体はヒンジによって前記湾曲方
向と逆方向に折り曲げ可能に連結されているので、この
梯子の不使用時には、該梯子を前記ヒンジの箇所で折り
曲げてマンホールの上端面を覆わせることにより、マン
ホールに対する周囲の人の危険防止に役立つてマンホー
ル開口の保全に使用できるものである。 According to the ladder according to the present invention, each cross beam is bent outward with its central portion horizontal, and both ends thereof are connected to both side girders. In the meantime, the worker can approach the ladder even a little while raising and lowering in a narrow manhole, and the lifting and lowering operation is easy, and the worker's knees are less likely to contact the horizontal rail at the time of lifting and lowering, It is a safe manhole ladder that does not shake the ladder. In addition, the side girders are
Divided into two parts on the way.
Since it is connected so that it can be bent in the opposite direction to
When not in use, fold the ladder at the hinge
By bending and covering the top surface of the manhole,
Helping people around the hall avoid danger
It can be used for preserving the opening of the tool.
【図１】図１は本発明の一実施例に係るマンホール用梯
子の斜視図である。FIG. 1 is a perspective view of a ladder for manholes according to one embodiment of the present invention.
【図２】図２はその要部の平面図である。FIG. 2 is a plan view of a main part thereof.
【図３】図３は折り曲げ可能な状態をも示すマンホール
用梯子の斜視図である。FIG. 3 is a perspective view of a manhole ladder also showing a state in which the ladder can be bent.
１ 側桁 ２ 横桟４ ヒンジ 1 side beam 2 horizontal beam 4 hinge
Claims (1)
結して構成したマンホール用梯子において、各横桟を中
央部を水平状態で外方へ湾曲させてその両端を両側桁に
連結し、且つ各側桁を２分割体で構成しこれをヒンジに
より連結して前記湾曲方向と逆方向に折り曲げ可能にし
たことを特徴とするマンホール用梯子。1. A manhole ladder constructed by connecting both side girders and a plurality of horizontal studs between them, each horizontal stirrer is bent outward in a horizontal state at a central portion, and both ends are connected to both side girders. And each side spar is composed of two parts and this is used as a hinge
A ladder for a manhole, wherein the ladder is more connected to be bent in a direction opposite to the bending direction .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7145132A JP2743315B2 (en) | 1995-05-22 | 1995-05-22 | Manhole ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7145132A JP2743315B2 (en) | 1995-05-22 | 1995-05-22 | Manhole ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08311906A JPH08311906A (en) | 1996-11-26 |
| JP2743315B2 true JP2743315B2 (en) | 1998-04-22 |
Family
ID=15378154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7145132A Expired - Fee Related JP2743315B2 (en) | 1995-05-22 | 1995-05-22 | Manhole ladder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2743315B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806153A (en) * | 2015-02-15 | 2015-07-29 | 长兴宏兴实业有限公司 | Ladder used for communication inspection wells |
| CN107956416A (en) * | 2017-10-11 | 2018-04-24 | 张广舜 | A kind of arc is marked time Gui formula multi-purpose portable ladder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03430Y2 (en) * | 1985-07-25 | 1991-01-09 | ||
| JPH0426242U (en) * | 1990-06-21 | 1992-03-02 |
-
1995
- 1995-05-22 JP JP7145132A patent/JP2743315B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08311906A (en) | 1996-11-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |