JPH0728201Y2 - Manhole cover - Google Patents
Manhole coverInfo
- Publication number
- JPH0728201Y2 JPH0728201Y2 JP1989131308U JP13130889U JPH0728201Y2 JP H0728201 Y2 JPH0728201 Y2 JP H0728201Y2 JP 1989131308 U JP1989131308 U JP 1989131308U JP 13130889 U JP13130889 U JP 13130889U JP H0728201 Y2 JPH0728201 Y2 JP H0728201Y2
- Authority
- JP
- Japan
- Prior art keywords
- receiving frame
- lid
- peripheral surface
- inner peripheral
- lid body
- 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
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、マンホールの蓋に関し、特に、蓋本体が位置
ずれしたり、がたついたりすることなく、しかも、蓋本
体が受枠に食い込むことを防止できるようにしたマンホ
ールの蓋に関するものである。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a manhole lid, and more particularly, to prevent the lid body from slipping into the receiving frame without being displaced or rattling. The present invention relates to a manhole cover capable of preventing the above.
従来、マンホールの蓋は、地面に埋設される環状の受枠
と、この受枠の上部に内嵌される円板状の蓋本体とを備
えており、受枠が蓋本体を受け止める方法としては、次
の２つの方法がある。Conventionally, a manhole cover is provided with an annular receiving frame buried in the ground and a disc-shaped lid main body fitted inside the upper part of the receiving frame. There are two ways.
第１の方法は、例えば第３図に示すように、受枠101の
内周面103、その上部104が大径で下部105が小径の段付
円筒面に形成し、この内周面103の段付面106に蓋本体２
の外周部の裏面で受け止める方法である。In the first method, as shown in FIG. 3, for example, an inner peripheral surface 103 of a receiving frame 101, an upper portion 104 thereof is formed into a stepped cylindrical surface having a large diameter and a lower portion 105 thereof is formed into a stepped cylindrical surface, and the step of the inner peripheral surface 103 is formed. The lid body 2 on the attachment surface 106
It is a method of receiving on the back surface of the outer peripheral part.
また、第２の方法は、例えば第４図に示すように、受枠
201の内周面203を上部204が大径で下部205が小径の段付
円筒面に形成し、内周面203の上部204及び蓋本体202の
外周面207を勾配が同じ下細りのテーパ面に形成して、
受枠201の内周面203の上部204に蓋本体202の外周面207
を受け止めさせる方法である。The second method is, for example, as shown in FIG.
The inner peripheral surface 203 of 201 is formed as a stepped cylindrical surface having an upper portion 204 having a large diameter and a lower portion 205 having a small diameter, and the upper portion 204 of the inner peripheral surface 203 and the outer peripheral surface 207 of the lid main body 202 are tapered surfaces having the same slope. To form
The outer surface 207 of the lid body 202 is attached to the upper part 204 of the inner surface 203 of the receiving frame 201.
It is a method to make them accept.
上記第１の方法によれば、蓋本体102の開閉を容易にす
るため、蓋本体102の外周面107と受枠101の内周面103の
上部104との間に隙間を形成する必要があり、蓋本体102
の上を自動車等が通過する時に蓋本体101の位置がずれ
たり、蓋本体102ががたついたりすることがある。According to the first method, in order to facilitate the opening and closing of the lid body 102, it is necessary to form a gap between the outer peripheral surface 107 of the lid body 102 and the upper portion 104 of the inner peripheral surface 103 of the receiving frame 101, Lid body 102
When a car or the like passes over the top, the position of the lid main body 101 may shift or the lid main body 102 may rattle.
上記第２の方法においては、受枠201の内周面203の上部
204と蓋本体202の外周面207とが互いに密着するので、
蓋本体202の位置がずれたり、蓋本体202ががたついたり
することを防止できる。しかしながら、蓋本体202の上
を通過する自動車等の重量によって蓋本体202が受枠201
に押し込まれて食い込み、蓋本体202を開けることが非
常に困難になることがある。In the above second method, the upper part of the inner peripheral surface 203 of the receiving frame 201
Since 204 and the outer peripheral surface 207 of the lid body 202 are in close contact with each other,
It is possible to prevent the position of the lid body 202 from shifting and the lid body 202 from rattling. However, due to the weight of a vehicle or the like passing over the lid body 202, the lid body 202 may not receive the receiving frame 201.
It may be very difficult to open the lid main body 202 by being pushed into and biting into.
本考案は、上記の事情を考慮してなされたものであり、
蓋本体が位置ずれしたり、がたついたりすることなく、
しかも、蓋本体が受枠に食い込むことを防止できるよう
にしたマンホールの蓋を提供することを目的とするもの
である。The present invention has been made in consideration of the above circumstances,
Without the lid body being displaced or rattling,
Moreover, it is an object of the present invention to provide a manhole cover capable of preventing the cover body from biting into the receiving frame.
上記課題を解決するための手段として、地面に埋設され
る環状の受枠と、該受枠の上部に密嵌される円板状の蓋
本体とを備え、該受枠の内周面を上部が大経で下部が小
経の段付円筒面に形成し、該受枠の内周面の上部を下細
りのテーパ面に形成するとともに、上記蓋本体の外周面
を上記受枠の内周面の上部テーパ面と勾配が同じ下細り
のテーパ面に形成し、上記受枠の段付面と上記蓋本体の
外周部の裏面とのいずれか一方に、周方向にほぼ等間隔
を置いて３つの突起部を形成し、上記受枠に上記蓋本体
を密嵌した状態で、これら突起部が上記受枠内周面の段
付面と上記蓋本体の外周部の裏面との他方に当接される
ように構成したマンホールの蓋が採用される。As a means for solving the above problems, an annular receiving frame buried in the ground and a disc-shaped lid body that is tightly fitted to the upper part of the receiving frame are provided, and the upper part of the inner peripheral surface of the receiving frame is the sutra-long diameter. The lower part is formed into a stepped cylindrical surface with a small warp, the upper part of the inner peripheral surface of the receiving frame is formed into a tapered surface, and the outer peripheral surface of the lid main body is formed into an upper tapered surface of the inner peripheral surface of the receiving frame. Is formed on the tapered surface having the same slope as that of the above, and three protrusions are formed on the stepped surface of the receiving frame or the back surface of the outer peripheral portion of the lid body at substantially equal intervals in the circumferential direction. The manhole is configured so that the protrusions are in contact with the other of the stepped surface of the inner peripheral surface of the receiving frame and the back surface of the outer peripheral portion of the lid main body in a state where the lid main body is tightly fitted to the receiving frame. The lid of is adopted.
本考案においては、蓋本体と受枠とが互いにテーパ面で
嵌合されるので、蓋本体が安定良く受枠に受け止められ
る。また、蓋本体の裏面に形成された３つの突起部が受
枠の段付面に当接され、あるいは、蓋本体の裏面が受枠
の段付面に形成された３つの突起部に当接されるので、
蓋本体が受枠に食い込むことが防止される。しかも、３
つの突起部は受枠の段付面あるいは蓋本体の外周部の裏
面に周方向に等間隔を置いて設けられるので、蓋本体が
安定良く受枠の段付面に受け止められ、これらの突起部
がつっかえになって蓋本体ががたつく恐れはない。In the present invention, since the lid body and the receiving frame are fitted to each other by the tapered surfaces, the lid body can be stably received by the receiving frame. Further, the three projections formed on the back surface of the lid body are brought into contact with the stepped surface of the receiving frame, or the back surface of the lid body is brought into contact with the three projections formed on the stepped surface of the receiving frame. So
The lid body is prevented from cutting into the receiving frame. Moreover, 3
Since the two protrusions are provided on the stepped surface of the receiving frame or the back surface of the outer peripheral portion of the lid body at equal intervals in the circumferential direction, the lid body is stably received by the stepped surface of the receiving frame, and these protrusions are replaced. There is no risk of the lid body rattling.
以下、本考案の実施例を図面に基づき説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図は本考案の一実施例に係るマンホールの蓋の平面
図であり、第２図は第１図のＡ−Ａ線縦断面図である。FIG. 1 is a plan view of a manhole cover according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view taken along the line AA of FIG.
このマンホールの蓋は、地面に埋設される環状の受枠１
と、この受枠１の上部に内嵌される円板状の蓋本体２と
で構成される。The manhole cover is an annular receiving frame 1 that is buried in the ground.
And a disc-shaped lid body 2 that is fitted inside the receiving frame 1.
受枠１は例えば鋳鉄で作られ、その内周面３は上部４が
大径で下部５が小径の段付円筒面に形成される。この内
周面３の上部４は機械加工により下細りテーパ面に形成
される。The receiving frame 1 is made of, for example, cast iron, and an inner peripheral surface 3 of the receiving frame 1 is formed as a stepped cylindrical surface having an upper portion 4 having a large diameter and a lower portion 5 having a small diameter. The upper portion 4 of the inner peripheral surface 3 is formed into a lower tapered surface by machining.
上記受枠１の内周面３の段付面７には、周方向に等間隔
を置いて３つの突起部８が形成される。段付面７は一般
的には鋳放し仕上げとされるが、これら３つの突起部８
の上面９は受枠１の上面から一定の深さに位置するよう
に機械加工によって平面状に成形される。また、各突起
部８の周方向の長さは、特に限定されないが、ここでは
全周の約９分の１（1/9）としてある。また、各突起部
８の高さは、特に限定されないが、ここでは約2mmとし
てある。On the stepped surface 7 of the inner peripheral surface 3 of the receiving frame 1, three projecting portions 8 are formed at equal intervals in the circumferential direction. The stepped surface 7 is generally an as-cast finish, but these three protrusions 8
The upper surface 9 of is formed by machining into a flat shape so as to be located at a constant depth from the upper surface of the receiving frame 1. The circumferential length of each protrusion 8 is not particularly limited, but here it is about 1/9 (1/9) of the entire circumference. The height of each protrusion 8 is not particularly limited, but is about 2 mm here.
蓋本体２は、鋳鉄で作られ、互いに一体に鋳造された上
板10と、リブ11と、周囲枠12とで構成される。周囲枠12
の外周面７は機械加工により受枠１の内周面３の上部４
と同じ勾配の下細りテーパ面に形成され、その下面13は
機械加工によって正確は平面に形成されている。The lid body 2 is made of cast iron, and is composed of an upper plate 10, a rib 11, and a peripheral frame 12 which are cast integrally with each other. Surrounding frame 12
The outer peripheral surface 7 of the upper part 4 of the inner peripheral surface 3 of the receiving frame 1 is machined.
It is formed as a downward taper surface having the same slope as that of which the lower surface 13 is precisely formed into a flat surface by machining.
また、蓋本体２の上面には滑り止めの凹凸模様が付さ
れ、外周部には開蓋操作レバーを差し込む１対の切欠部
14が形成され、上板９には開蓋操作用鉤を差し込む１対
の鉤挿入孔15が形成されている。The top surface of the lid body 2 is provided with a non-slip concavo-convex pattern, and a pair of notches into which the lid opening lever is inserted to the outer peripheral portion.
14 is formed, and the upper plate 9 is formed with a pair of hook insertion holes 15 into which hooks for opening the lid are inserted.
このマンホールの蓋においては、蓋本体２を受枠１の内
周面３の上部４に嵌合させることにより蓋される。ここ
で、蓋本体２は受枠１の内周面３の上部４にテーパ嵌合
されるので、受枠１の上部内で蓋本体２が正確に位置決
めされ、蓋本体２の位置ずれやがたつきが防止される。
また、蓋本体２の外周部の裏面が受枠１の段付面７に設
けた３つの突起部８に受け止められるので、蓋本体２が
一定以上受枠１に押し込められなくなり、蓋本体２が受
枠１に食い込むことが防止される。The lid of the manhole is fitted by fitting the lid main body 2 to the upper portion 4 of the inner peripheral surface 3 of the receiving frame 1. Here, since the lid main body 2 is taper-fitted to the upper portion 4 of the inner peripheral surface 3 of the receiving frame 1, the lid main body 2 is accurately positioned in the upper portion of the receiving frame 1, and the positional deviation or rattling of the lid main body 2 is caused. Is prevented.
Further, since the back surface of the outer peripheral portion of the lid main body 2 is received by the three protrusions 8 provided on the stepped surface 7 of the receiving frame 1, the lid main body 2 cannot be pushed into the receiving frame 1 more than a certain amount, and the lid main body 2 receives the receiving frame 1 It is prevented from cutting into.
上記の実施例では、受枠１の段付面７に突起部８を形成
してあるが、これに代えて蓋本体２の外周囲部の裏面に
突起部８を形成し、段付面７を平面に形成してもよい。In the above embodiment, the projecting portion 8 is formed on the stepped surface 7 of the receiving frame 1, but instead of this, the projecting portion 8 is formed on the back surface of the outer peripheral portion of the lid main body 2 to form the stepped surface 7. You may form in a plane.
なお、各突起部８の上面（あるいは下面）は平面に限定
されず、上細りのテーパ面に形成することも可能であ
る。Note that the upper surface (or lower surface) of each protrusion 8 is not limited to a flat surface, and can be formed as an upper tapered surface.
また、上記突起部８を４つ以上設けることも試みたが、
この場合には、地表への埋設時に受枠１のが変形するの
で、機械加工された各突起部８の機械加工面の高さが異
なり、蓋本体２ががたつくことが多く、実用性に乏し
い。また、上記突起部８を２つ設ける場合には、これら
突起部８を結ぶ直線を中心にして蓋本体２が揺動し、蓋
本体１のがたつきを防止することができない。Further, although it has been attempted to provide four or more protrusions 8,
In this case, since the receiving frame 1 is deformed when it is buried in the surface of the earth, the height of the machined surface of each machined protrusion 8 is different, and the lid body 2 often rattles, which is not practical. Further, when the two protrusions 8 are provided, the lid body 2 swings around the straight line connecting the protrusions 8 and the rattling of the lid body 1 cannot be prevented.
以上のように、本考案は受枠の内周面の上部及び蓋本体
の外周面を勾配が同じ下細りのテーパ面に形成して、蓋
本体の外周全体を受枠内周面の上部テーパ面に密嵌保持
されるから、蓋本体が安定よく受枠に止められ、例えば
自動車の通過に際して蓋本体が位置ずれしたり、がたつ
いたりすることを防止できる。さらに、蓋本体の外周部
裏面と受枠の段付面との間に介在する３つの突起部によ
って蓋本体外周部が受枠の段付面に受け止められるの
で、蓋本体が受枠に食い込むことが防止される。しか
も、３つの突起部は受枠の内周面の段付面あるいは蓋本
体の外周部の裏面に周方向にほぼ等間隔を置いて設けら
れるので、これらの突起部がつっかえになって蓋本体が
がたつく恐れもない。As described above, according to the present invention, the upper part of the inner peripheral surface of the receiving frame and the outer peripheral surface of the lid body are formed into tapered surfaces having the same slope, and the entire outer periphery of the lid body is formed into the upper tapered surface of the inner peripheral surface of the receiving frame. Since the lid main body is tightly fitted and held, the lid main body can be stably held on the receiving frame, and for example, the lid main body can be prevented from being displaced or rattling when an automobile passes. Further, since the outer peripheral portion of the lid main body is received by the stepped surface of the receiving frame by the three protrusions interposed between the rear surface of the outer peripheral portion of the lid main body and the stepped surface of the receiving frame, the lid main body is prevented from biting into the receiving frame. It Moreover, since the three projections are provided on the stepped surface of the inner peripheral surface of the receiving frame or the back surface of the outer peripheral portion of the lid body at substantially equal intervals in the circumferential direction, these projections are replaced and the lid body is replaced. There is no fear of rattling.
第１図は本考案の一実施例に係るマンホールの蓋の平面
図、第２図は第１図のＡ−Ａ線縦断面図、第３図は従来
のマンホールの蓋の縦断面図、第４図は他の従来のマン
ホールの蓋の縦断面図である。 １……受枠、２……蓋本体、３……内周面、４……上
部、５……下部、６……段付面、７……外周面、８……
突起部。1 is a plan view of a manhole cover according to an embodiment of the present invention, FIG. 2 is a vertical sectional view taken along the line AA of FIG. 1, and FIG. 3 is a vertical sectional view of a conventional manhole cover. FIG. 4 is a longitudinal sectional view of another conventional manhole cover. 1 ... Receiving frame, 2 ... Lid body, 3 ... Inner peripheral surface, 4 ... Top, 5 ... Lower part, 6 ... Stepped surface, 7 ... Outer peripheral surface, 8 ...
protrusion.
Claims (1)
上部に密嵌される円板状の蓋本体とを備え、該受枠の内
周面を上部が大経で下部が小経の段付円筒面に形成し、
該受枠の内周面の上部を下細りのテーパ面に形成すると
ともに、上記蓋本体の外周面を上記受枠の内周面の上部
テーパ面と勾配が同じ下細りのテーパ面に形成し、上記
受枠の段付面と上記蓋本体の外周部の裏面とのいずれか
一方に、周方向にほぼ等間隔を置いて３つの突起部を形
成し、上記受枠に上記蓋本体を密嵌した状態で、これら
突起部が上記受枠内周面の段付面と上記蓋本体の外周部
の裏面との他方に当接されるように構成したことを特徴
とするマンホールの蓋。1. An annular receiving frame embedded in the ground, and a disc-shaped lid main body tightly fitted to the upper part of the receiving frame, wherein the upper part of the inner peripheral surface of the receiving frame is large and the lower part is small. Formed on the stepped cylindrical surface of
The upper part of the inner peripheral surface of the receiving frame is formed into a tapered taper surface, and the outer peripheral surface of the lid body is formed into a tapered surface having the same slope as the upper tapered surface of the inner peripheral surface of the receiving frame. In the state where the three protrusions are formed at substantially equal intervals in the circumferential direction on one of the stepped surface of the receiving frame and the back surface of the outer peripheral portion of the lid body, and the lid body is tightly fitted to the receiving frame. A lid for a manhole, wherein the projections are configured to come into contact with the other of the stepped surface of the inner peripheral surface of the receiving frame and the back surface of the outer peripheral portion of the lid main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989131308U JPH0728201Y2 (en) | 1989-11-11 | 1989-11-11 | Manhole cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989131308U JPH0728201Y2 (en) | 1989-11-11 | 1989-11-11 | Manhole cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0369048U JPH0369048U (en) | 1991-07-09 |
| JPH0728201Y2 true JPH0728201Y2 (en) | 1995-06-28 |
Family
ID=31678824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989131308U Expired - Lifetime JPH0728201Y2 (en) | 1989-11-11 | 1989-11-11 | Manhole cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0728201Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4980765B2 (en) * | 2007-03-26 | 2012-07-18 | 株式会社仲田コーティング | Fine bubble generator, cleaning device using the same, showering device, ginger |
| JP2008237996A (en) * | 2007-03-26 | 2008-10-09 | Nakata Coating Co Ltd | Fine air bubble producer, and washing device, showering device, and fish preserve using the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53146262U (en) * | 1977-04-25 | 1978-11-17 | ||
| JPS5948432B2 (en) * | 1977-06-15 | 1984-11-26 | 松下電器産業株式会社 | code reader |
-
1989
- 1989-11-11 JP JP1989131308U patent/JPH0728201Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0369048U (en) | 1991-07-09 |
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