JP2000178991A - Manhole and pipe joint for manhole - Google Patents
Manhole and pipe joint for manholeInfo
- Publication number
- JP2000178991A JP2000178991A JP10358930A JP35893098A JP2000178991A JP 2000178991 A JP2000178991 A JP 2000178991A JP 10358930 A JP10358930 A JP 10358930A JP 35893098 A JP35893098 A JP 35893098A JP 2000178991 A JP2000178991 A JP 2000178991A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- manhole
- joint
- downflow
- main 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.)
- Withdrawn
Links
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明はマンホールおよびマン
ホール用管継手に関し、特にたとえばマンホール本体内
で下水本管に流下管を接続したマンホールおよびそのよ
うなマンホールにおける流下管の一部を構成するマンホ
ール用管継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole and a pipe joint for a manhole, and more particularly to a manhole in which a downflow pipe is connected to a sewage main pipe in a manhole body, and a manhole constituting a part of the downflow pipe in such a manhole. Related to pipe fittings.
【0002】[0002]
【従来の技術】図9および図10に示すこの種の従来の
マンホール1は、傾斜地等に敷設される上流側の下水本
管2aと下流側の下水本管2bとを所定の段差を有して
接続するためのものである。マンホール1は、人が出入
りするための開口3aを有する本体3を含み、本体3の
上部側壁には、可撓ゴム部4aを有する伸縮可撓継手4
を介して上流側の下水本管2aが接続され、下部側壁に
も、上部側壁と同様に、可撓ゴム部5aを有する伸縮可
撓継手5を介して下流側の下水本管2bが接続される。
また、下水本管2aには、本体3の内部において流下管
6が接続される。流下管6は、下水本管2aの端部に接
続されるマンホール継手6a、マンホール継手6aの分
岐口にカラー6bを介して接続される直管6cおよび直
管6cの下端に接続される90°曲管6dを含み、支持
金具7を用いて本体3の側壁に固定される。2. Description of the Related Art A conventional manhole 1 of this kind shown in FIGS. 9 and 10 has a predetermined step between an upstream sewage main pipe 2a and a downstream sewage main pipe 2b laid on a slope or the like. It is for connecting. The manhole 1 includes a main body 3 having an opening 3a for a person to enter and exit, and an upper side wall of the main body 3 has a telescopic flexible joint 4 having a flexible rubber portion 4a.
The lower sewage main pipe 2a is connected to the lower sewage main pipe 2a via a telescopic flexible joint 5 having a flexible rubber portion 5a, similarly to the upper side wall. You.
A downflow pipe 6 is connected to the sewage main pipe 2a inside the main body 3. The downflow pipe 6 is a manhole joint 6a connected to the end of the sewage main pipe 2a, a straight pipe 6c connected to a branch port of the manhole joint 6a via a collar 6b, and a 90 ° connected to the lower end of the straight pipe 6c. It includes the curved tube 6d and is fixed to the side wall of the main body 3 using the support fitting 7.
【0003】マンホール1の施工後、地震などに伴う地
盤変位によって下水本管2aに管路を伸縮または屈曲す
る方向の力が作用すると、伸縮可撓継手4が変形され、
図10中の二点鎖線で示すように、下水本管2aおよび
流下管6が変位されて下水本管2aとマンホール1との
接合部Aに作用する応力が吸収される。After the manhole 1 is constructed, when a force in the direction of expanding or contracting or bending the pipeline is applied to the sewage main pipe 2a due to ground displacement caused by an earthquake or the like, the elastic joint 4 is deformed,
As shown by the two-dot chain line in FIG. 10, the sewage main pipe 2a and the downflow pipe 6 are displaced, and the stress acting on the joint A between the sewage main pipe 2a and the manhole 1 is absorbed.
【0004】[0004]
【発明が解決しようとする課題】従来技術では、伸縮可
撓継手4によって接合部Aの破損を防止できるものの、
支持金具7で固定された流下管6には伸縮性および可撓
性がないため、流下管6のうち変位する部分と固定され
た部分との境界部Bに過大な応力が作用して、流下管6
が破損する恐れがあった。また、本体3の内部での流下
管6の配管作業性が悪いという問題点もあった。In the prior art, although the joint A can be prevented from being damaged by the elastic joint 4,
Since the downflow pipe 6 fixed by the support fitting 7 does not have elasticity and flexibility, an excessive stress acts on a boundary portion B between the displaceable part and the fixed part of the downflow pipe 6, and the downflow pipe 6 flows down. Tube 6
Could be damaged. There is also a problem that the workability of the piping of the downflow pipe 6 inside the main body 3 is poor.
【0005】それゆえに、この発明の主たる目的は、管
路の破損を防止できるとともに流下管の配管作業性を向
上できる、マンホールおよびマンホール用管継手を提供
することである。[0005] Therefore, a main object of the present invention is to provide a manhole and a pipe joint for a manhole which can prevent breakage of a pipe line and improve workability of piping of a downflow pipe.
【0006】[0006]
【課題を解決するための手段】第1の発明は、本体と、
本体に下水本管を取り付けるための第1の伸縮可撓継手
と、本体内で下水本管に接続される流下管とを備えるマ
ンホールにおいて、流下管の一部に第2の伸縮可撓継手
を用いたことを特徴とする、マンホールである。According to a first aspect of the present invention, a main body,
In a manhole including a first telescopic flexible joint for attaching a sewage main pipe to a main body, and a downflow pipe connected to the sewage main pipe in the main body, a second telescopic flexible joint is provided at a part of the downflow pipe. A manhole, characterized by being used.
【0007】第2の発明は、一端が下水本管に接続され
る第1接続口であり、かつ、他端が点検口である第1短
管、第1短管に形成される分岐口、分岐口に取り付けら
れる伸縮可撓継手、および一端が伸縮可撓継手に接続さ
れ、かつ、他端が第2接続口となる第2短管を備える、
マンホール用管継手である。The second invention is a first short pipe having one end connected to a sewer main pipe and the other end serving as an inspection port, a branch port formed in the first short pipe, A telescopic flexible joint attached to the branch port, and a second short pipe having one end connected to the telescopic flexible joint and the other end serving as a second connection port;
Manhole fitting.
【0008】[0008]
【作用】地震などに伴う地盤変位によって下水本管に管
路を伸縮または屈曲する方向の力が作用すると、第1お
よび第2の伸縮可撓継手が変形されることによって下水
本管および流下管が無理なく変位され、下水本管とマン
ホールとの接合部や流下管に作用する応力が吸収され
る。また、流下管の配管作業時には、第2の伸縮可撓継
手において流下管を容易に変位させることができるの
で、マンホール内の限られたスペースでも容易に配管で
きる。When a force in the direction of expanding and contracting or bending a pipeline acts on a sewage main pipe due to ground displacement caused by an earthquake or the like, the first and second telescopic flexible joints are deformed, so that the sewage main pipe and the downflow pipe are deformed. Is easily displaced, and the stress acting on the junction between the sewer main pipe and the manhole and the downflow pipe is absorbed. Further, at the time of piping work of the downcomer pipe, the downcomer pipe can be easily displaced in the second telescopic flexible joint, so that piping can be easily performed even in a limited space in the manhole.
【0009】[0009]
【発明の効果】この発明によれば、管路の破損を防止で
きるとともに、流下管の配管作業性を向上できる。この
発明の上述の目的,その他の目的,特徴および利点は、
図面を参照して行う以下の実施例の詳細な説明から一層
明らかとなろう。According to the present invention, it is possible to prevent the pipeline from being damaged and to improve the workability of piping the downflow pipe. The above and other objects, features and advantages of the present invention are:
It will be more apparent from the following detailed description of embodiments, which proceeds with reference to the accompanying drawings.
【0010】[0010]
【実施例】図1および図2に示すこの実施例のマンホー
ル10は、傾斜地等に敷設される上流側の下水本管12
aと下流側の下水本管12bとを所定の段差を有して接
続するためのものであり、コンクリートからなる本体1
4と、本体14に下水本管12aを接続するための伸縮
可撓継手16と、本体14の底部に汚水を導くための流
下管18とを含む。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A manhole 10 of this embodiment shown in FIGS. 1 and 2 has an upstream sewage main pipe 12 laid on a slope or the like.
a and a downstream main sewage main pipe 12b are connected to each other with a predetermined step.
4, a telescopic flexible joint 16 for connecting the sewage main pipe 12a to the main body 14, and a downflow pipe 18 for guiding sewage to the bottom of the main body 14.
【0011】本体14は、人が出入りするための開口2
0を有し、開口20には蓋22が取り付けられる。ま
た、本体14の上部側壁および下部側壁には第1孔24
および第2孔26が形成され、本体14の底部には第2
孔26へ向けて汚水を導くためのインバート28が形成
される。そして、第1孔24には、伸縮可撓継手16を
介して下水本管12aが接続され、第2孔26には、伸
縮可撓継手16と同じ構造の伸縮可撓継手30を介して
下水本管12bが接続される。The main body 14 has an opening 2 for a person to enter and exit.
0, and a lid 22 is attached to the opening 20. Further, first holes 24 are formed in the upper side wall and the lower side wall of the main body 14.
And a second hole 26 is formed at the bottom of the main body 14.
An invert 28 for guiding sewage toward the hole 26 is formed. The sewage main pipe 12 a is connected to the first hole 24 via the elastic joint 16, and the sewage is connected to the second hole 26 via the elastic joint 30 having the same structure as the elastic joint 16. The main pipe 12b is connected.
【0012】伸縮可撓継手16は図3に示すように、塩
化ビニル等のような合成樹脂からなるサドル部32とゴ
ム等のような可撓材料からなる可撓部34とを含む。サ
ドル部32は本体14の外面に沿って湾曲された取付部
36を含み、取付部36には複数の孔38が形成され
る。また、取付部36の略中央には孔40が形成され、
孔40の周縁から立ち上がって立上げ部42が形成され
る。一方、可撓部34は筒状部44を含み、筒状部44
の一端から径方向外側へ延びて鍔状のシール部46が形
成され、シール部46には複数の突起48が形成され
る。そして、突起48と孔38とが嵌合されることによ
って、サドル部32と可撓部34とが接合される。As shown in FIG. 3, the expansion joint 16 includes a saddle portion 32 made of a synthetic resin such as vinyl chloride and a flexible portion 34 made of a flexible material such as rubber. The saddle portion 32 includes a mounting portion 36 curved along the outer surface of the main body 14, and a plurality of holes 38 are formed in the mounting portion 36. A hole 40 is formed substantially at the center of the mounting portion 36,
A rising portion 42 is formed by rising from the periphery of the hole 40. On the other hand, the flexible portion 34 includes a tubular portion 44, and the tubular portion 44
A flange-like seal portion 46 is formed to extend radially outward from one end of the seal portion 46, and a plurality of protrusions 48 are formed on the seal portion 46. When the projection 48 and the hole 38 are fitted, the saddle portion 32 and the flexible portion 34 are joined.
【0013】流下管18は、図1に示すように、マンホ
ール用管継手50,直管52および90°曲管54を含
む。マンホール用管継手50は、図3に示すように、十
字状の短管56を含み、短管56の一方側端,他方側
端,上端および下端には、それぞれ接続口58,第1点
検口60,第2点検口62および分岐口64が形成さ
れ、第1点検口60および第2点検口62には、これら
を封鎖するための蓋66がシール材66aを介して装着
され、蝶ボルト68を用いて固定される。すなわち、図
4に示すように、蓋66にねじ孔70が形成され、第1
点検口60および第2点検口62にねじ孔70に対応す
る孔72が形成され、蝶ボルト68が第1点検口60お
よび第2点検口62の外側から孔72を貫通してねじ孔
70に螺合される。As shown in FIG. 1, the downcomer pipe 18 includes a manhole fitting 50, a straight pipe 52, and a 90 ° bent pipe 54. As shown in FIG. 3, the manhole pipe joint 50 includes a cross-shaped short pipe 56, and a connection port 58 and a first inspection port are provided at one end, the other end, the upper end, and the lower end of the short pipe 56, respectively. 60, a second inspection port 62 and a branch port 64 are formed, and a lid 66 for closing the first inspection port 60 and the second inspection port 62 is attached via a sealing material 66a. It is fixed using. That is, as shown in FIG. 4, a screw hole 70 is formed in
A hole 72 corresponding to the screw hole 70 is formed in the inspection port 60 and the second inspection port 62, and the wing bolt 68 passes through the hole 72 from the outside of the first inspection port 60 and the second inspection port 62 to the screw hole 70. It is screwed.
【0014】また、分岐口64には、図3に示すよう
に、接続部材74が接着され、分岐口64および接続部
材74の外面には、ゴム等のような可撓材料からなる蛇
腹状の伸縮可撓継手76が締め付けバンド78aを用い
て接続され、伸縮可撓継手76の下端には、短管80が
締め付けバンド78bを用いて接続される。そして、短
管80の接続口(下端部)にカラー82を介して直管5
2が接続され、直管52の下端部に90°曲管54が接
続される。As shown in FIG. 3, a connecting member 74 is adhered to the branch port 64, and an outer surface of the branch port 64 and the connecting member 74 is formed in a bellows shape made of a flexible material such as rubber. The expansion joint 76 is connected using a fastening band 78a, and a short pipe 80 is connected to the lower end of the expansion joint 76 using a fastening band 78b. The straight pipe 5 is connected to the connection port (lower end) of the short pipe 80 via the collar 82.
2 is connected, and a 90 ° bent pipe 54 is connected to the lower end of the straight pipe 52.
【0015】マンホール10を組み立てる際には、地中
に設置した本体14の内部において流下管18を配管
し、マンホール用管継手50の接続口58を本体14の
孔24内に配置した状態で、伸縮可撓継手76の下方に
おいて流下管18を本体14に支持金具84を用いて固
定する。一方、本体14の外側面の孔24に対応する位
置に、伸縮可撓継手16を図示しない番線を用いて固定
する。そして、本体14の孔26に継手30を介して下
流側の下水本管12bを接続するとともに、マンホール
用管継手50の接続口58に上流側の下水本管12aを
接続し、接続口58の外面と孔24の内面との隙間にモ
ルタル86を充填する。ただし、この施工手順は、現場
状況に応じて適宜変更されてもよい。When assembling the manhole 10, the downflow pipe 18 is piped inside the main body 14 installed underground, and the connection port 58 of the manhole fitting 50 is arranged in the hole 24 of the main body 14. The downflow pipe 18 is fixed to the main body 14 below the telescopic flexible joint 76 by using a support fitting 84. On the other hand, the expandable flexible joint 16 is fixed to a position corresponding to the hole 24 on the outer surface of the main body 14 using a number line (not shown). The downstream sewage main pipe 12 b is connected to the hole 26 of the main body 14 via the joint 30, and the upstream sewage main pipe 12 a is connected to the connection port 58 of the manhole fitting 50. The mortar 86 is filled in the gap between the outer surface and the inner surface of the hole 24. However, this construction procedure may be appropriately changed according to the site situation.
【0016】施工後、地震などに伴う地盤変位によって
下水本管12aに管路を伸縮または屈曲する方向の力が
作用すると、伸縮可撓継手16および76が変形される
ことによって、下水本管12aおよび流下管18(マン
ホール用管継手50)が図3中の二点鎖線で示すように
無理なく変位され、下水本管12aとマンホール10と
の接合部や流下管18に作用する応力が吸収される。After the construction, when a force in the direction of expanding or contracting the pipeline acts on the sewer main pipe 12a due to ground displacement due to an earthquake or the like, the elastic joints 16 and 76 are deformed, and the sewer main pipe 12a is deformed. In addition, the downflow pipe 18 (manhole pipe joint 50) is easily displaced as shown by a two-dot chain line in FIG. 3, and the stress acting on the junction between the sewage main pipe 12a and the manhole 10 and the downflow pipe 18 is absorbed. You.
【0017】この実施例によれば、伸縮可撓継手76に
よって流下管18に作用する応力を吸収できるので、流
下管18における管路の破損を防止できる。また、伸縮
可撓継手76において流下管18の長さや向きを適宜調
整できるので、本体14内の限られたスペースでも流下
管18を容易に配管できる。なお、上述の実施例では、
マンホール用管継手50に2つの点検口60および62
を形成した場合を示したが、たとえば図5に示すよう
に、マンホール用管継手50の側端のみに点検口60を
形成してもよい。According to this embodiment, the stress acting on the downcomer pipe 18 can be absorbed by the expansion and contraction flexible joint 76, so that damage to the pipeline in the downcomer pipe 18 can be prevented. In addition, since the length and direction of the downflow pipe 18 can be appropriately adjusted in the expansion and contraction joint 76, the downflow pipe 18 can be easily piped even in a limited space in the main body 14. In the above embodiment,
The manhole fitting 50 has two access ports 60 and 62.
Although the case of forming is shown, for example, as shown in FIG. 5, the inspection port 60 may be formed only on the side end of the pipe joint 50 for manholes.
【0018】また、上述の実施例では、マンホール用管
継手50の伸縮可撓継手76をゴム等のような可撓材料
で蛇腹状に形成しているが、伸縮可撓継手76の形状は
適宜変更可能であり、たとえば図6に示すように、プレ
ーン状に形成してもよい。また、上述の実施例では、伸
縮可撓継手76を流下管18の上部に配置しているが、
伸縮可撓継手76は流下管18のどの位置に配置しても
よく、たとえば図7に示すように、流下管18の中央部
に配置してもよい。この場合には、マンホール用管継手
88を構成する短管90の分岐口92にカラー94を介
して直管96が接続され、直管96の下端部に接続部材
74(図3)を介して伸縮可撓継手76が接続される。
そして、伸縮可撓継手76の下方において、流下管18
が本体14に固定される。In the above-described embodiment, the elastic joint 76 of the pipe joint 50 for manhole is formed in a bellows shape with a flexible material such as rubber. It can be changed, and may be formed in a plane shape as shown in FIG. 6, for example. Further, in the above-described embodiment, the expansion / contraction flexible joint 76 is disposed above the downflow pipe 18.
The telescopic flexible joint 76 may be arranged at any position of the downflow pipe 18, for example, as shown in FIG. 7, may be arranged at the center of the downflow pipe 18. In this case, a straight pipe 96 is connected via a collar 94 to a branch port 92 of a short pipe 90 constituting a manhole pipe joint 88, and a lower end of the straight pipe 96 is connected via a connecting member 74 (FIG. 3). The expansion joint 76 is connected.
Then, below the expansion / contraction joint 76, the falling pipe 18
Is fixed to the main body 14.
【0019】さらに、上述の実施例では、分岐口64に
接続部材74を介して伸縮可撓継手76を接続するよう
にしているが、たとえば図8に示すように、接続部材7
4を用いることなく、分岐口64に伸縮可撓継手76を
直接接続するようにしてもよい。Further, in the above-described embodiment, the flexible joint 76 is connected to the branch port 64 via the connecting member 74. For example, as shown in FIG.
The expansion / contraction flexible joint 76 may be directly connected to the branch port 64 without using the branch port 4.
【図1】この発明の一実施例を示す図解図である。FIG. 1 is an illustrative view showing one embodiment of the present invention;
【図2】図1におけるII−II線断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.
【図3】下水本管と流下管との接続構造を示す図解図で
ある。FIG. 3 is an illustrative view showing a connection structure between a sewage main pipe and a downflow pipe;
【図4】点検口を封鎖する蓋の取付構造示す図解図であ
る。FIG. 4 is an illustrative view showing a mounting structure of a lid for closing an inspection port;
【図5】マンホール用管継手の変形例を示す図解図であ
る。FIG. 5 is an illustrative view showing a modified example of the pipe joint for manholes;
【図6】マンホール用管継手の変形例を示す図解図であ
る。FIG. 6 is an illustrative view showing a modified example of the manhole pipe joint;
【図7】この発明の他の実施例を示す図解図である。FIG. 7 is an illustrative view showing another embodiment of the present invention;
【図8】この発明の他の実施例を示す図解図である。FIG. 8 is an illustrative view showing another embodiment of the present invention;
【図9】従来技術を示す図解図である。FIG. 9 is an illustrative view showing a conventional technique;
【図10】従来技術における下水本管と流下管との接続
構造を示す図解図である。FIG. 10 is an illustrative view showing a connection structure between a sewage main pipe and a downflow pipe in a conventional technique.
10 …マンホール 12a,12b …下水本管 14 …本体 16,76 …伸縮可撓継手 18 …流下管 50 …マンホール用管継手 56 …短管 58 …接続口 60,62 …点検口 64 …分岐口 84 …支持金具 DESCRIPTION OF SYMBOLS 10 ... Manhole 12a, 12b ... Sewage main pipe 14 ... Main body 16, 76 ... Elastic expansion joint 18 ... Downflow pipe 50 ... Manhole pipe joint 56 ... Short pipe 58 ... Connection port 60, 62 ... Inspection port 64 ... Branch port 84 … Support bracket
───────────────────────────────────────────────────── フロントページの続き (72)発明者 堀 智明 大阪府堺市石津北町64番地 株式会社クボ タビニルパイプ工場内 Fターム(参考) 2D047 BA28 3H019 AA01 AA04 BA04 BB02 DA03 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tomoaki Hori 64 Ishizu-Kitacho, Sakai-shi, Osaka Kubota Vinyl Pipe Factory F-term (reference) 2D047 BA28 3H019 AA01 AA04 BA04 BB02 DA03
Claims (2)
ための第1の伸縮可撓継手と、前記本体内で前記下水本
管に接続される流下管とを備えるマンホールにおいて、 前記流下管の一部に第2の伸縮可撓継手を用いたことを
特徴とする、マンホール。1. A manhole comprising a main body, a first telescopic flexible joint for attaching a sewage main pipe to the main body, and a down flow pipe connected to the sewage main pipe in the main body, A manhole, wherein a second telescopic flexible joint is used for a part of the manhole.
あり、かつ、他端が点検口である第1短管、 前記第1短管に形成される分岐口、 前記分岐口に取り付けられる伸縮可撓継手、および一端
が前記伸縮可撓継手に接続され、かつ、他端が第2接続
口となる第2短管を備える、マンホール用管継手。2. A first short pipe, one end of which is a first connection port connected to a sewer main pipe, and the other end of which is an inspection port; a branch port formed in the first short pipe; And a second joint connected at one end to the flexible joint and the other end serving as a second connection port.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10358930A JP2000178991A (en) | 1998-12-17 | 1998-12-17 | Manhole and pipe joint for manhole |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10358930A JP2000178991A (en) | 1998-12-17 | 1998-12-17 | Manhole and pipe joint for manhole |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2000178991A true JP2000178991A (en) | 2000-06-27 |
Family
ID=18461857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10358930A Withdrawn JP2000178991A (en) | 1998-12-17 | 1998-12-17 | Manhole and pipe joint for manhole |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2000178991A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021059862A (en) * | 2019-10-04 | 2021-04-15 | 長野油機株式会社 | Seismic structure for manhole, construction method thereof, and cutting device used to implement construction method |
JP7121955B1 (en) * | 2021-04-30 | 2022-08-19 | 長野油機株式会社 | Seismic structure of manhole, construction method thereof, and cutting device used for implementation of construction method |
-
1998
- 1998-12-17 JP JP10358930A patent/JP2000178991A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021059862A (en) * | 2019-10-04 | 2021-04-15 | 長野油機株式会社 | Seismic structure for manhole, construction method thereof, and cutting device used to implement construction method |
JP7121955B1 (en) * | 2021-04-30 | 2022-08-19 | 長野油機株式会社 | Seismic structure of manhole, construction method thereof, and cutting device used for implementation of construction method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20060307 |