JPH0547280Y2 - - Google Patents
Info
- Publication number
- JPH0547280Y2 JPH0547280Y2 JP1985141748U JP14174885U JPH0547280Y2 JP H0547280 Y2 JPH0547280 Y2 JP H0547280Y2 JP 1985141748 U JP1985141748 U JP 1985141748U JP 14174885 U JP14174885 U JP 14174885U JP H0547280 Y2 JPH0547280 Y2 JP H0547280Y2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- concrete wall
- footrest
- leg
- coating layer
- 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 - Lifetime
Links
- 239000011347 resin Substances 0.000 claims description 22
- 229920005989 resin Polymers 0.000 claims description 22
- 239000011247 coating layer Substances 0.000 claims description 21
- 238000012856 packing Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000002184 metal Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Ladders (AREA)
- Sealing Material Composition (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案はコンクリート壁に取付けて壁面の昇降
に使用される足掛具におけるシール装置に関する
ものである。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a sealing device for a footrest that is attached to a concrete wall and used for raising and lowering the wall surface.
（従来の技術）
コンクリート壁例えばマンホール側壁には人が
容易に昇降できるように、足掛具が設けられる。
足掛具のコンクリート壁への取付方法としては、
種々の方法が使われているが、その中の１つに第
２図のようなねじ締結式の方法がある。これは足
掛具１の脚部２に棒状の芯金３があり、この先端
部にねじ４が螺刻されている。この芯金３をコン
クリート壁１０の孔１１を貫通せしめ、ナツト５
で締めつけるものである。(Prior Art) A footrest is provided on a concrete wall, such as a side wall of a manhole, so that a person can easily go up and down.
How to attach the footrest to a concrete wall:
Various methods are used, one of which is a screw fastening method as shown in FIG. This has a rod-shaped core metal 3 on the leg part 2 of the footrest 1, and a screw 4 is threaded into the tip of this metal core 3. This core metal 3 is passed through the hole 11 of the concrete wall 10, and the nut 5
It is tightened with.
（考案が解決しようとする問題点）
このような足掛具の取付方法を行つた場合に
は、外側から芯金３のねじ部４と、コンクリート
壁１０の孔１１のすき間を通つて、内部こゝでは
マンホール内に水が侵入することがある。これを
防ぐために第２図に示すように、ねじ部４にはゴ
ムパツキン６とワツシヤ７が嵌めこまれており、
またコンクリート壁１０のナツト５が締め付けら
れる部分に凹所８をつくり、モルタル９を充填し
て水の侵入を防いでいる。また脚部２の芯金３は
ポリプロピレン等の樹脂被覆層１２で覆われてお
り、コンクリート壁１０の孔１１は、この樹脂被
覆層１２の端部１２ａが嵌入しうるように、段部
端面１１ａが設けられ、さらにコンクリート壁１
０の孔１１と、樹脂被覆層１２の接する部分は、
それぞれテーパ面１１ｂ，１２ｂを形成してお
り、密着しやすい構造になつている。しかしなが
ら、大雨時や水圧が高い場合には、足掛具１のテ
ーパ面１２ｂと孔１１のテーパ面１１ｂとの隙間
を通りゴムパツキン６の内径側の隙間から水漏れ
が起き、多量の水が浸入するという問題がある。
本考案はこのような水もれを防止して、水密構造
の足掛具を得るために成されたものである。(Problem to be solved by the invention) When such a method of installing a footrest is used, the inside is inserted from the outside through the gap between the threaded part 4 of the core bar 3 and the hole 11 of the concrete wall 10. In this case, water may enter the manhole. To prevent this, as shown in FIG. 2, a rubber packing 6 and a washer 7 are fitted into the threaded portion 4.
Further, a recess 8 is formed in the part of the concrete wall 10 where the nut 5 is tightened, and is filled with mortar 9 to prevent water from entering. Further, the core bar 3 of the leg portion 2 is covered with a resin coating layer 12 made of polypropylene or the like, and the hole 11 of the concrete wall 10 is formed so that the end portion 12a of the resin coating layer 12 can fit into the step end surface 11a. is installed, and a concrete wall 1
The contact area between the hole 11 of 0 and the resin coating layer 12 is as follows:
Tapered surfaces 11b and 12b are formed, respectively, and the structure allows for easy close contact. However, during heavy rain or when water pressure is high, water leaks through the gap between the tapered surface 12b of the footrest 1 and the tapered surface 11b of the hole 11 and from the gap on the inner diameter side of the rubber gasket 6, allowing a large amount of water to infiltrate. There is a problem with doing so.
The present invention has been made in order to prevent such water leakage and to obtain a footrest having a watertight structure.
（問題点を解決するための手段）
本考案は上記の問題点を解決するための手段と
して、足掛具の棒状の脚部の先端にねじ部を形成
し、コンクリート壁に前記ねじ部を貫通する孔を
穿設すると共に、該孔内部に環状段部を形成し、
前記コンクリート壁の孔に前記足掛具の脚部をね
じ部により締結し水密にする足掛具のシール装置
において、前記コンクリート壁の孔にテーパ面を
形成して、該足掛具の脚部に、これを被覆した樹
脂被覆層によつてコンクリート壁の孔のテーパ面
に適合するテーパ面を形成すると共に段部端面を
設け、前記コンクリート壁の孔の環状段部に、前
記樹脂被覆層の段部端面と対向する段部端面を形
成し、前記樹脂被覆層の段部端面と前記孔の段部
端面との間に環状パツキンを介装し、しかも脚部
のテーパ面に複数の環状ひれを形成したことを特
徴とする。(Means for solving the problem) The present invention, as a means to solve the above problem, forms a threaded part at the tip of the rod-shaped leg of the footrest, and penetrates the threaded part into the concrete wall. drilling a hole and forming an annular step inside the hole;
In the sealing device for a footrest that is made watertight by fastening the leg of the footrest to a hole in the concrete wall using a threaded portion, the leg of the footrest is formed with a tapered surface in the hole in the concrete wall. A tapered surface that matches the tapered surface of the hole in the concrete wall is formed by the resin coating layer coated with the resin coating layer, and a step end surface is provided, and the resin coating layer is applied to the annular step of the hole in the concrete wall. A step end face facing the step end face is formed, an annular packing is interposed between the step end face of the resin coating layer and the step end face of the hole, and a plurality of annular fins are provided on the tapered surface of the leg. It is characterized by the formation of
（作用）
本考案は上記のように構成したので、コンクリ
ート壁の孔に足掛具の脚部が進入したとき、環状
パツキンの変形によつて、当接する両部材のテー
パ面にかかる押圧力が調整され、さらに、複数の
環状ひれが孔のテーパ面に圧着されるので、脚部
の樹脂被覆層は確実にコンクリート壁のテーパ面
に圧接されることになる。(Function) Since the present invention is configured as described above, when the leg of the footrest enters the hole in the concrete wall, the deformation of the annular packing causes a pressing force to be applied to the tapered surfaces of the two members in contact with each other. Since the plurality of annular fins are adjusted and pressed against the tapered surface of the hole, the resin coating layer of the leg portion is surely pressed against the tapered surface of the concrete wall.
（実施例）
以下本考案の実施例を図について説明する。第
１図は本考案をマンホールに広用した場合の実施
例を示す断面図で、足掛具は１つの脚部のみを示
し、脚部の中心をとおる断面で示してある。また
第２図と同一部材は同一符号を以て示す。第１図
において足掛具１の脚部２は、その尖端部がステ
ンレス製の芯金３で出来ており、それをコンクリ
ート壁１０の孔１１に嵌入させて、芯金３に設け
たねじ４と、ナツト５によつて、コンクリート壁
１０に、脚部２を固定するようになつている。足
掛具１の脚部２の芯金３には、樹脂を被覆して樹
脂被覆層１２が形成されるがそれによつて段部が
つくられ、段部端面１２ａが形成される。尚こゝ
までは第２図の場合と同様である。一方、樹脂被
覆層１２によつて形成された段部端面１２ａに相
対するように、コンクリート壁１０の孔１１には
段部がつくられ段部端面１１ａを形成する。そし
てコンクリート壁１０の孔１１の段部端面１１ａ
と、樹脂被覆層１２の段部端面１２ａとの間に、
環状パツキンとしてＯリング１３を介装する。ま
たコンクリート壁１０の孔１１と脚部２の樹脂被
覆層１２とが接する部分は、コンクリート壁１０
の孔１１にテーパ面１１ｂを形成し、脚部２の樹
脂被覆層１２の先部には、孔１１のテーパ面１１
ｂと同じテーパ角を有するテーパ面１２ｂを形成
すると共に複数の環状ひれ１２ｃを形成させる。(Example) An example of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment in which the present invention is widely applied to manholes. Only one leg of the footrest is shown, and the cross-section passing through the center of the leg is shown. Further, the same members as in FIG. 2 are indicated by the same reference numerals. In FIG. 1, the leg part 2 of the footrest 1 has a pointed end made of a stainless steel core metal 3, which is inserted into a hole 11 in a concrete wall 10, and a screw 4 is attached to the core metal 3. The leg portion 2 is fixed to the concrete wall 10 by the nut 5. The core metal 3 of the leg portion 2 of the footrest 1 is coated with resin to form a resin coating layer 12, thereby creating a stepped portion and forming a stepped portion end face 12a. The process up to this point is the same as the case shown in FIG. On the other hand, a step is formed in the hole 11 of the concrete wall 10 so as to face the step end surface 12a formed by the resin coating layer 12, forming a step end surface 11a. And the step end face 11a of the hole 11 in the concrete wall 10
and the step end surface 12a of the resin coating layer 12,
An O-ring 13 is interposed as an annular packing. Further, the portion where the hole 11 of the concrete wall 10 and the resin coating layer 12 of the leg portion 2 are in contact with each other is
A tapered surface 11b is formed in the hole 11, and the tapered surface 11b of the hole 11 is formed at the tip of the resin coating layer 12 of the leg portion 2.
A tapered surface 12b having the same taper angle as b is formed, and a plurality of annular fins 12c are formed.
次に作用を説明する。コンクリート製１０の孔
１１の段部端面１１ａと足掛具１の脚部２の樹脂
被覆層１２の端面１２ａとの間に介装されたＯリ
ング１３は、ナツト５をまわして脚部２の芯金３
を締め付けると、端面１１ａ，１２ａの間に挟ま
れて圧縮をうける。これによつて、端面１１ａ，
１２ａとＯリング１３との間は密着する。また、
孔１１のテーパ面１１ｂと脚部２の樹脂被覆層１
２の先部のテーパ面１２ｂとが密着され、しか
も、複数の環状ひれ１２ｃが孔１１のテーパ面１
１ｂを押圧することになり、弾性力によつて密着
し、ナツト５による締結と相俟つて、足掛具１の
脚部２がコンクリート壁１０に固定される。なお
本考案の環状パツキンとしては、上記Ｏリングに
限定されず、環状のパツキンであれば断面形状
は、角形等非円形のものでもよい。 Next, the effect will be explained. The O-ring 13 interposed between the step end face 11a of the hole 11 of the concrete 10 and the end face 12a of the resin coating layer 12 of the leg part 2 of the footrest 1 is inserted into the leg part 2 by turning the nut 5. Core metal 3
When it is tightened, it is sandwiched between the end surfaces 11a and 12a and is compressed. With this, the end face 11a,
12a and O-ring 13 are in close contact. Also,
Tapered surface 11b of hole 11 and resin coating layer 1 of leg portion 2
2 are in close contact with the tapered surface 12b at the tip of the hole 11, and the plurality of annular fins 12c are in close contact with the tapered surface 12b of the hole 11.
1b, the elastic force brings them into close contact, and together with the fastening with the nuts 5, the leg portion 2 of the footrest 1 is fixed to the concrete wall 10. Note that the annular packing of the present invention is not limited to the above-mentioned O-ring, and as long as it is an annular packing, the cross-sectional shape may be non-circular, such as a rectangular shape.
（考案の効果）
本考案は上記のような構成と作用を有するもの
であるから、環状パツキンの変形によつてコンク
リート壁のテーパ面と足掛具の脚部の樹脂被覆層
とが複数の環状ひれにより強く密閉され、ねじ部
の隙間に影響なく外部と遮断され、水密状態を確
実に保持することができる。すなわち、水漏れの
箇所となる構造的な隙間を有しないので、大雨時
や水圧が高い場合にも水漏れの発生を防ぐことが
できるものである。水の侵入は、ほとんど完全に
防止できる。(Effects of the invention) Since the present invention has the above-described structure and function, the tapered surface of the concrete wall and the resin coating layer of the leg of the footrest are formed into a plurality of annular shapes by deforming the annular packing. It is tightly sealed by the fins and is isolated from the outside without affecting the gap between the threaded parts, ensuring a watertight state. That is, since there is no structural gap that can cause water leakage, water leakage can be prevented even during heavy rain or when water pressure is high. Water ingress can be almost completely prevented.
第１図は本考案の実施例の脚部の断面図、第２
図は従来技術の足掛具脚部を、ねじによつて締結
した場合の断面図である。
１……足掛具、２……足掛具脚部、３……足掛
具脚部芯金、１２……足掛具脚部樹脂被覆層、１
２ａ……足掛具脚部樹脂被覆層端面、１０……コ
ンクリート壁、１１……コンクリート壁孔、１１
ａ……コンクリート壁孔段部端面、１３……Ｏリ
ング。
Fig. 1 is a cross-sectional view of the leg of the embodiment of the present invention;
The figure is a cross-sectional view of a leg of a conventional footrest fastened with a screw. DESCRIPTION OF SYMBOLS 1... Footrest, 2... Footrest leg, 3... Footrest leg core metal, 12... Footrest leg resin coating layer, 1
2a...End face of resin coating layer of footrest leg, 10...Concrete wall, 11...Concrete wall hole, 11
a... Concrete wall hole step end surface, 13... O-ring.
Claims (1)
コンクリート壁に前記ねじ部を貫通する孔を穿設
すると共に、該孔内部に環状段部を形成し、前記
コンクリート壁の孔に前記足掛具の脚部をねじ部
により締結し水密にする足掛具のシール装置にお
いて、前記コンクリート壁の孔にテーパ面を形成
し、該足掛具の脚部に、これを被覆した樹脂被覆
層によつてコンクリート壁の孔のテーパ面に適合
するテーパ面を形成すると共に段部端面を設け、
前記コンクリート壁の孔の環状段部に、前記樹脂
被覆層の段部端面と対向する段部端面を形成し、
前記樹脂被覆層の段部端面と前記孔の段部端面と
の間に環状パツキンを介装し、しかも脚部のテー
パ面に複数の環状ひれを形成したことを特徴とす
る足掛具のシール装置。 A threaded portion is formed at the tip of the rod-shaped leg of the footrest,
A foot that is made watertight by drilling a hole through the threaded part in a concrete wall, forming an annular step inside the hole, and fastening the leg part of the footrest to the hole in the concrete wall using the threaded part. In the hanging equipment sealing device, a tapered surface is formed in the hole in the concrete wall, and the leg part of the foot hanging equipment is coated with a resin coating layer to form a tapered surface that conforms to the tapered surface of the hole in the concrete wall. and provide a step end surface,
forming a step end face opposite to a step end face of the resin coating layer in the annular step of the hole in the concrete wall;
A seal for a footrest, characterized in that an annular packing is interposed between the step end surface of the resin coating layer and the step end surface of the hole, and a plurality of annular fins are formed on the tapered surface of the leg. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985141748U JPH0547280Y2 (en) | 1985-09-17 | 1985-09-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985141748U JPH0547280Y2 (en) | 1985-09-17 | 1985-09-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6249600U JPS6249600U (en) | 1987-03-27 |
| JPH0547280Y2 true JPH0547280Y2 (en) | 1993-12-13 |
Family
ID=31049825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985141748U Expired - Lifetime JPH0547280Y2 (en) | 1985-09-17 | 1985-09-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0547280Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020077523A (en) | 2018-11-07 | 2020-05-21 | デクセリアルズ株式会社 | Protection element |
| JP7173902B2 (en) | 2019-03-05 | 2022-11-16 | デクセリアルズ株式会社 | protective element |
| JP7256667B2 (en) | 2019-03-28 | 2023-04-12 | デクセリアルズ株式会社 | protective element |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS589500B2 (en) * | 1975-02-17 | 1983-02-21 | 三菱電機株式会社 | It's hard to do anything. |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60369Y2 (en) * | 1981-07-13 | 1985-01-08 | 羽田ヒユ−ム管株式会社 | Foothold device for manhole |
| JPS58165198U (en) * | 1982-04-27 | 1983-11-02 | 三山工業株式会社 | Footrests for manholes, etc. |
-
1985
- 1985-09-17 JP JP1985141748U patent/JPH0547280Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS589500B2 (en) * | 1975-02-17 | 1983-02-21 | 三菱電機株式会社 | It's hard to do anything. |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6249600U (en) | 1987-03-27 |
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