JP4442895B2 - 転落防止用梯子および転落防止用梯子を備えた地下構造物用蓋 - Google Patents
転落防止用梯子および転落防止用梯子を備えた地下構造物用蓋 Download PDFInfo
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- JP4442895B2 JP4442895B2 JP2005053165A JP2005053165A JP4442895B2 JP 4442895 B2 JP4442895 B2 JP 4442895B2 JP 2005053165 A JP2005053165 A JP 2005053165A JP 2005053165 A JP2005053165 A JP 2005053165A JP 4442895 B2 JP4442895 B2 JP 4442895B2
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- 230000002265 prevention Effects 0.000 title claims description 35
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 235000014676 Phragmites communis Nutrition 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 5
- 244000273256 Phragmites communis Species 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Description
また、カシメ結合とすることによって部品点数が削減されるとともに、転落防止用梯子の生産効率が高まり、製造コストを低減することができる。
更に、横杆には倒伏状態において、横杆の下面に開口部および横杆の上面に貫通孔を形成させるようにしたので、これにより地下構造物内に揚圧が発生した場合においても、横杆自体に加わる揚圧力を低減させることができる。
2 フレーム
3 支軸
4 締結用ボルト
5 横杆
6 取付座
6a 突起部
7 梯子
8 取付部
8a 固定部
8b 傾斜面
9 上ブロック
9a 開口
9b 突起
10 下ブロック
11 ボルト
11a ナット
12 取付片
13 枢軸
14 把持部
15 ロックプレート
16 長孔
17 係止片
18 ロック部材
19 絞り部
20 突起片
21 挿入口
22 係留用ピン
23 スライド用長穴
24 開口部
24a 貫通孔
25 スプリング
26 調整部
26a 調整ネジ
27 スライド部
28 錘部
29 係合部
30 立ち上り片部
31 縁鍔
Claims (2)
- 地下構造物用蓋の受枠内に起伏可能に装着される転落防止用梯子において、
間隔をおいて配置される一対のフレームと、
前記一対のフレームの両端側に平行に配置され、前記一対のフレームを連結する2本の支軸と、
前記一対のフレーム間に配置される複数の横杆とを備え、
前記一対のフレームは、プレス成形によりその長手方向の両端に沿って全長にわたり立ち上がり片部を設け、
前記一対のフレームと前記2本の支軸とは強固に結合したラーメン構造とし、
前記複数の横杆は、プレス成形により突合せ状の円筒断面に形成するとともに、
前記2本の支軸の間に配置され、前記複数の横杆の両端外周上の少なくとも2箇所以上において、前記一対のフレームに対しカシメ結合され、
前記横杆には、倒伏状態において、
前記横杆の下面の長手方向に沿って開口部が複数個開口され、
前記開口部に対向する上面の長手方向に沿って貫通孔が複数個開口されており、
前記貫通孔の周縁部には横杆の内方に向かって延在する縁鍔が設けられている
ことを特徴とする転落防止用梯子。 - 受枠内周面に取付部を介して、請求項1に記載の転落防止用梯子を装着するとともに、倒伏させた転落防止用梯子の先端側を受枠内周面に形成した支持部で支持した
転落防止用梯子を備えた地下構造物用蓋。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005053165A JP4442895B2 (ja) | 2005-02-28 | 2005-02-28 | 転落防止用梯子および転落防止用梯子を備えた地下構造物用蓋 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005053165A JP4442895B2 (ja) | 2005-02-28 | 2005-02-28 | 転落防止用梯子および転落防止用梯子を備えた地下構造物用蓋 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006233691A JP2006233691A (ja) | 2006-09-07 |
JP2006233691A5 JP2006233691A5 (ja) | 2007-03-01 |
JP4442895B2 true JP4442895B2 (ja) | 2010-03-31 |
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Application Number | Title | Priority Date | Filing Date |
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JP2005053165A Active JP4442895B2 (ja) | 2005-02-28 | 2005-02-28 | 転落防止用梯子および転落防止用梯子を備えた地下構造物用蓋 |
Country Status (1)
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JP (1) | JP4442895B2 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4876081B2 (ja) * | 2007-01-26 | 2012-02-15 | 虹技株式会社 | 地下構造物の受枠部材用転落防止装置 |
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- 2005-02-28 JP JP2005053165A patent/JP4442895B2/ja active Active
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JP2006233691A (ja) | 2006-09-07 |
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