JPH01109600U - - Google Patents
Info
- Publication number
- JPH01109600U JPH01109600U JP422088U JP422088U JPH01109600U JP H01109600 U JPH01109600 U JP H01109600U JP 422088 U JP422088 U JP 422088U JP 422088 U JP422088 U JP 422088U JP H01109600 U JPH01109600 U JP H01109600U
- Authority
- JP
- Japan
- Prior art keywords
- bars
- ladder
- section
- utility
- model registration
- 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
- 230000002787 reinforcement Effects 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 2
Landscapes
- Ladders (AREA)
Description
第１図は本考案の一実施例による梯子の要部断
面図、第２図は従来の梯子の斜視図、第３図〜第
５図は本考案の実施例、比較例及び比較例２
に対する原理的な桿断面構造をそれぞれ示す図並
びに第６図は第３図〜第５図による断面構造の試
算に用いる２次モーメント曲線を示す。
２…桿、３，１８…横棒、１３ａ…中間部、１
５…補強部。
Fig. 1 is a sectional view of essential parts of a ladder according to an embodiment of the present invention, Fig. 2 is a perspective view of a conventional ladder, and Figs. 3 to 5 are an embodiment of the present invention, a comparative example, and a comparative example 2.
Figures illustrating the principle cross-sectional structure of a rod, respectively, and FIG. 6 show second-order moment curves used for the trial calculation of the cross-sectional structure according to FIGS. 3 to 5. 2... Rod, 3, 18... Horizontal bar, 13a... Middle part, 1
5...Reinforcement part.
Claims (1)
されて固定されている梯子において、 桿が、対面する細長の板における断面縦方向の
両端内側面に、それぞれ断面ロの字形の補強部を
設けて形成されていることを特徴とする梯子。[Claims for Utility Model Registration] In a ladder in which a plurality of horizontal bars are arranged and fixed between two parallel bars, the bars are located within both ends of the longitudinal cross-section of the facing elongated plates. A ladder characterized in that each side is formed with reinforcement parts each having a rectangular cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP422088U JPH01109600U (en) | 1988-01-19 | 1988-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP422088U JPH01109600U (en) | 1988-01-19 | 1988-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01109600U true JPH01109600U (en) | 1989-07-25 |
Family
ID=31206534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP422088U Pending JPH01109600U (en) | 1988-01-19 | 1988-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01109600U (en) |
-
1988
- 1988-01-19 JP JP422088U patent/JPH01109600U/ja active Pending