JPH0312824Y2 - - Google Patents
Info
- Publication number
- JPH0312824Y2 JPH0312824Y2 JP4933785U JP4933785U JPH0312824Y2 JP H0312824 Y2 JPH0312824 Y2 JP H0312824Y2 JP 4933785 U JP4933785 U JP 4933785U JP 4933785 U JP4933785 U JP 4933785U JP H0312824 Y2 JPH0312824 Y2 JP H0312824Y2
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- bolts
- head
- receiving frame
- circumferential wall
- 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
Links
- 238000007689 inspection Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Description
【考案の詳細な説明】
[産業上の利用分野]
本考案は、地下構築物などの点検孔、操作孔な
どに設けられる係止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 locking cover provided in an inspection hole, an operation hole, etc. of an underground structure.
[従来の技術]
従来より、地下構築物である下水道のマンホー
ル、地中配線用のハンドホールなどに点検、掃除
などのために設けられる地上開口部、ガス、水道
配管のバルブなどのためコンクリートなどで作ら
れたバルブ保護枠の地上開口部などに、開閉可能
な蓋板が取付けられており、薬品、燃料、水など
の貯槽などにも、点検のため開口部が設けられ蓋
板が取付けられているが、近時、下水道などに廃
棄物を不法投棄されないように蓋板を受枠にボル
トで締付け、簡単に開閉できぬようにしたり、薬
品、燃料などの貯槽など簡単に開閉できぬばかり
でなく、蓋板と受枠間にパツキングを取付け、蓋
板を受枠にボルト締めをして密閉することなどが
行なわれており、蓋板および受枠は鋳鉄または合
成樹脂により製作され、セツトとして供給されて
いる。[Conventional technology] Conventionally, underground structures such as sewer manholes and hand holes for underground wiring have above-ground openings installed for inspection and cleaning purposes, as well as valves for gas and water piping, etc., using concrete, etc. A cover plate that can be opened and closed is attached to the above-ground opening of the valve protection frame that has been created, and openings are also provided to storage tanks for chemicals, fuel, water, etc. for inspection, and cover plates are attached to the opening. However, recently, in order to prevent waste from being illegally dumped into sewers, the lid plate is tightened to the receiving frame with bolts so that it cannot be opened or closed easily. , packing is installed between the cover plate and the receiving frame, and the cover plate is bolted to the receiving frame to seal it, and the cover plate and receiving frame are made of cast iron or synthetic resin and are supplied as a set. .
[考案が解決しようとする問題点]
以上の如く、地下構築物などの開口部などで、
開けられて困るものの蓋板は、受枠にボルトで固
定するものが広く使用されてきたが、ボルトは日
本工業規格などで決められた六角頭を有するボル
トが一般に使用され、このボルトを操作する六角
ボルト用レンチが広く普及しており、特に自動車
の部品にも同じボルトが使用されているので六角
レンチが工具として広く常備されており、簡単に
ボルトを操作して、蓋板が開けられて了うので、
一般に普及していない、すなわち、六角ボルト用
レンチなどの普及されている工具では操作できな
いボルトを取付けることが要望されるようになつ
てきた。このため、本願出願人は、実願昭57ー
169294(実開昭59ー73450 号公報)として錠付の
ボルトを使用することを考え、提案したが、錠付
ボルトは高価であり、操作に鍵が必要であるなど
面倒であるので、更に安価で操作も容易で、かつ
一般の工具では操作できないボルトを取付けるこ
とが要望されるようになつてきた。[Problems that the invention aims to solve] As mentioned above, in openings of underground structures, etc.
For lid plates that are difficult to open, it has been widely used to fix them to a receiving frame with bolts, but bolts with hexagonal heads specified by Japanese Industrial Standards are generally used, and hexagonal heads are used to operate these bolts. Wrenches for bolts are widely used, and the same bolts are also used in automobile parts, so hexagonal wrenches are widely kept as tools, and it is easy to operate the bolts and open the cover plate. So,
There has been a growing demand for mounting bolts that are not commonly used, that is, bolts that cannot be operated with commonly used tools such as hex bolt wrenches. For this reason, the applicant of this application
169294 (Utility Model Publication No. 16929-73450), we considered and proposed the use of bolts with locks, but bolts with locks are expensive and cumbersome as they require a key to operate, so it is cheaper to use them. There is a growing demand for bolts that are easy to operate and that cannot be operated with ordinary tools.
[問題点を解決するための手段]
本考案は、かゝる要望を解決するため、ボルト
1のボルト頭3を円柱状とすると共に、ボルト頭
3の頭頂面に外周壁が角のない多角形をなし、内
周壁は円形をなす環状の溝4を設けたボルト1を
使用することにより解決したものである。[Means for Solving the Problems] In order to solve these demands, the present invention makes the bolt head 3 of the bolt 1 cylindrical, and the outer circumferential wall of the top surface of the bolt head 3 is made of polygons without corners. This problem was solved by using a bolt 1 having a rectangular shape and an annular groove 4 having a circular inner circumferential wall.
[実施例]
本考案を、図面に示す実施例に従がつて説明す
る。[Example] The present invention will be explained according to an example shown in the drawings.
第1図の斜視図、第4,5図の実施状況を示す
上面図および断面図に示した如く、本考案に使用
されるボルト1は、ボルト頭3が円柱状をなし、
かつ頭頂面に外周壁が角をなくした五角形をな
し、内周壁は円形をなす環状の溝4を設けたもの
で、蓋板7を受枠8に締付けるようにしたもので
ある。 As shown in the perspective view of FIG. 1 and the top view and sectional view showing the implementation status of FIGS. 4 and 5, the bolt 1 used in the present invention has a cylindrical bolt head 3,
Moreover, the outer circumferential wall has a pentagonal shape with no corners on the top surface, and the inner circumferential wall is provided with a circular annular groove 4, so that the cover plate 7 can be fastened to the receiving frame 8.
従つて、本考案に使用されるボルト1を締付け
たり、緩めたりするためには、第2図に示す如
き、ボルト1のボルト頭3頭頂面に設けた環状の
溝4に嵌合するレンチ頭6を有するレンチ2が必
要となる。 Therefore, in order to tighten or loosen the bolt 1 used in the present invention, it is necessary to use a wrench head that fits into the annular groove 4 provided on the top surface of the bolt head 3 of the bolt 1, as shown in FIG. A wrench 2 with 6 is required.
また、ボルトの頭頂面に設ける環状の溝4の形
状は、実施例に限定するものでなく、一般に普及
されている六角頭用レンチ、六角穴用六角柱状レ
ンチ、螺子まわしなどの工具類で操作できない形
状、例えば溝の外周壁が三角形、四角形などでド
ライバーの先端が引掛からないような角をおとし
た各辺の長さの異なる円形に近い形状にするも差
支えなく、ボルトとレンチの組合せで製作すれば
よい。 Furthermore, the shape of the annular groove 4 provided on the top surface of the bolt is not limited to the embodiment, and can be operated with commonly used tools such as a hexagonal head wrench, a hexagonal column wrench for a hexagonal hole, and a screwdriver. For example, if the outer circumferential wall of the groove is triangular or square, there is no problem with creating a shape that is close to a circle with different lengths on each side with corners cut so that the tip of the screwdriver will not get caught. It can be manufactured with.
なお、第3,4,5図には蓋板7の四方向に突
片9を突設し、該突片9にボルト取付孔を設け、
ボルト1のボルト頭3が、締付時にボルト取付穴
内に埋込まれるようにした実施例を示したが、蓋
板7は円盤状をなし、周縁部にボルト取付孔を穿
設したものにも、第6図に示す如く適用され、受
枠にボルト取付孔を設け、第7図に示す如き蓋板
係止金具10を用いて、蓋板を係止する形式のも
のは、蓋板係止金具10を受枠に締付けるボルト
に適用することができ、さらに、ボルト1を締付
けた際に、ボルト頭3がボルト取付孔との間隙を
出来る限り少なくすることが望ましい。 In addition, in FIGS. 3, 4, and 5, protrusions 9 are provided protruding from the four directions of the cover plate 7, bolt mounting holes are provided in the protrusions 9,
Although an embodiment has been shown in which the bolt head 3 of the bolt 1 is embedded in the bolt mounting hole during tightening, the lid plate 7 may also be disc-shaped and have bolt mounting holes drilled in the peripheral edge. , which is applied as shown in FIG. 6, has a bolt mounting hole in the receiving frame, and locks the lid plate using the lid plate locking metal fitting 10 as shown in FIG. 7. 10 can be applied to a bolt fastened to a receiving frame, and furthermore, when the bolt 1 is fastened, it is desirable to minimize the gap between the bolt head 3 and the bolt mounting hole.
[考案の効果]
本考案は、以上の如く構成されているので、ボ
ルト1を専用のレンチ2により締付ければ、他の
一般に使用されている工具類、すなわち六角頭ボ
ルト用のレンチや、六角柱レンチ、モンキーレン
チなどボルト用レンチを使用して緩めることがで
きなく、また螺子まわしなども、その先端が引掛
かる角などがないので緩めることができないもの
である。[Effects of the invention] Since the present invention is constructed as described above, once the bolt 1 is tightened with the dedicated wrench 2, other commonly used tools such as a wrench for hexagon head bolts or a hexagon head bolt can be tightened. Bolt wrenches such as pillar wrenches and adjustable wrenches cannot be used to loosen bolts, and screwdrivers cannot be loosened because they do not have corners for the tips to catch.
従つて、従来、普通の工具で操作できた六角頭
ボルトなどを本考案のボルトに交換することによ
り、開閉しにくい係止蓋とすることができるもの
である。 Therefore, by replacing a hexagonal head bolt or the like that could conventionally be operated with an ordinary tool with the bolt of the present invention, a locking lid that is difficult to open and close can be obtained.
図面は、本考案の実施例を示すもので、第1図
は本考案に使用されるボルトの斜視図、第2図は
第1図のボルト用レンチの斜視図、第3図は係止
蓋の上面図、第4図は第3図のAの部分拡大上面
図、第5図は第4図のAーA線断面図、第6図は
他の実施例の部分断面図、第7図は蓋板係止金具
のみにボルトを嵌合した斜視図である。
1……ボルト、2……レンチ、3……ボルト
頭、4……溝、5……円柱体、6……レンチ頭、
7……蓋板、8……受枠、9……突片、10……
蓋板係止金具。
The drawings show an embodiment of the present invention. Figure 1 is a perspective view of a bolt used in the invention, Figure 2 is a perspective view of the bolt wrench shown in Figure 1, and Figure 3 is a locking lid. 4 is a partially enlarged top view of A in FIG. 3, FIG. 5 is a sectional view taken along line A-A in FIG. 4, FIG. 6 is a partial sectional view of another embodiment, and FIG. FIG. 2 is a perspective view showing a bolt fitted only to the lid plate locking fitting. 1... Bolt, 2... Wrench, 3... Bolt head, 4... Groove, 5... Cylindrical body, 6... Wrench head,
7... Lid plate, 8... Receiving frame, 9... Projection piece, 10...
Lid plate locking metal fittings.
Claims (1)
壁が角をなくした多角形をなし、内周壁が円形を
なす環状の溝4を設けたボルト1により、蓋板7
を受枠8に締付けるようにした係止蓋。 The bolt 1 has a cylindrical bolt head 3, an annular groove 4 on the top surface of which the outer circumferential wall has a polygonal shape with no corners, and whose inner circumferential wall is circular.
A locking lid that is tightened to a receiving frame 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4933785U JPH0312824Y2 (en) | 1985-04-04 | 1985-04-04 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4933785U JPH0312824Y2 (en) | 1985-04-04 | 1985-04-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61169159U JPS61169159U (en) | 1986-10-20 |
JPH0312824Y2 true JPH0312824Y2 (en) | 1991-03-26 |
Family
ID=30566440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4933785U Expired JPH0312824Y2 (en) | 1985-04-04 | 1985-04-04 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0312824Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100000375A1 (en) * | 2008-07-07 | 2010-01-07 | Steinbock Robert C | Tamper resistant jackbolts for a tensioner |
-
1985
- 1985-04-04 JP JP4933785U patent/JPH0312824Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS61169159U (en) | 1986-10-20 |
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