JP2011058323A - Work safety device in sewerage system - Google Patents

Work safety device in sewerage system Download PDF

Info

Publication number
JP2011058323A
JP2011058323A JP2009211776A JP2009211776A JP2011058323A JP 2011058323 A JP2011058323 A JP 2011058323A JP 2009211776 A JP2009211776 A JP 2009211776A JP 2009211776 A JP2009211776 A JP 2009211776A JP 2011058323 A JP2011058323 A JP 2011058323A
Authority
JP
Japan
Prior art keywords
manhole
sewer
safety device
ladder
work safety
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.)
Granted
Application number
JP2009211776A
Other languages
Japanese (ja)
Other versions
JP5324366B2 (en
Inventor
Eizo Takahashi
英三 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miyama Corp
Original Assignee
Miyama Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Miyama Corp filed Critical Miyama Corp
Priority to JP2009211776A priority Critical patent/JP5324366B2/en
Publication of JP2011058323A publication Critical patent/JP2011058323A/en
Application granted granted Critical
Publication of JP5324366B2 publication Critical patent/JP5324366B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Sewage (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a work safety device in a sewerage system where a simple system can be temporarily and easily installed, and a worker can safely work at ease in a manhole and throughout the sewage line. <P>SOLUTION: The work safety device in the sewerage system is intended for maintenance and inspection in the sewage channel which is connected with the interior and the bottom of the manhole and disposed almost horizontally. In the work safety device, a plastic ladder 3 having a bracket 4 suspended from an anchor bolt in the manhole 1 is disposed so as to reach the bottom surface in the sewerage 2 from the entrance of the manhole. A rescue rope 8 is suspended from a hook 9 along the ladder into the manhole. A water net 10 is stretched at the downstream side of the sewage channel for receiving a human body. A rescue rope 11 is stretched by the hooks on the side wall of the sewage channel at least from the bottom of the manhole to the water net. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、マンホール内及びマンホールの底部に接続され略水平状に配置された下水路内を補修,点検する下水路系内作業安全装置に関するものである。   The present invention relates to a work safety device in a sewer system that repairs and inspects a manhole and a sewer channel connected to the bottom of the manhole and arranged substantially horizontally.

従来,マンホール内及びマンホールの底部に接続され略水平状に配置された下水路内を補修,点検する下水路系内作業安全装置であって、マンホールに取り付けられる固定梯子と、該固定梯子にスライド昇降させる伸縮梯子と、該伸縮梯子に収納可能に設けられた横倒材と、該横倒材に収納可能に設けられた安全柵とからなるものがある(例えば特許文献1参照。)。   2. Description of the Related Art Conventionally, a work safety device in a sewer system for repairing and inspecting a manhole and a sewer channel connected to the bottom of a manhole and arranged in a substantially horizontal manner, a fixed ladder attached to the manhole, and a slide on the fixed ladder There are some which consist of a telescopic ladder to be moved up and down, a laterally-falling material provided so as to be accommodated in the telescopic ladder, and a safety fence provided so as to be accommodated in the laterally-falling material (see, for example, Patent Document 1).

特許第3534541号公報Japanese Patent No. 3534541

ところで、前記先行技術の下水路系内作業安全装置では、梯子及び安全柵の構造が複雑であり安全装置の設置が容易でないと共に下水路内を特定した作業安全装置であるという問題がある。   By the way, the work safety device in the sewage system of the prior art has a problem that the structure of the ladder and the safety fence is complicated, the installation of the safety device is not easy, and the work safety device identifies the inside of the sewage channel.

本発明は、従来の技術の有するこのような問題点に鑑みてなされたものであり、その目的とするところは、最近のマンホール及び下水路内の酸欠の事故やゲリラ豪雨などの予期せぬ事態による事故が多いことを鑑み、簡単なシステムを一時的に容易に施工することができると共にマンホール内及び下水路内全域で作業者が安全で安心し、作業ができる下水路系内作業安全装置を提供しようとするものである。   The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is the unexpected accidents such as recent manholes and deficiencies in sewage channels and guerrilla heavy rain. In view of the fact that there are many accidents due to the situation, it is possible to construct a simple system temporarily and at the same time, it is possible to work safely in the manhole and the entire sewer, and the work safety device in the sewer system that can work safely Is to provide.

上記目的を達成するために、本発明における下水路系内作業安全装置は、マンホール内のアンカーボルトに吊り下げられるブラケットを有する合成樹脂製の梯子をマンホール入口から下水路内の底面に達するように配置し、該梯子に沿ってマンホール内にレスキューロープをフックにより吊り下げ、前記下水路の下流側に人体を受け止めるウォーターネットを張設すると共に下水路の側壁に少なくとも前記マンホール底部からウォーターネットに至るレスキューロープをフックにより張設したものである。   In order to achieve the above object, the work safety device in the sewer system according to the present invention is configured so that a synthetic resin ladder having a bracket suspended from an anchor bolt in a manhole reaches the bottom surface in the sewer from the manhole entrance. The rescue rope is suspended in the manhole along the ladder by hooks, and a water net for receiving a human body is stretched downstream of the sewer, and at least from the bottom of the manhole to the water net on the side wall of the sewer A rescue rope is stretched by a hook.

また、前記梯子の横桟の両端に左右の色が異なる反射体を設置したものである。   Further, reflectors having different left and right colors are installed at both ends of the horizontal rail of the ladder.

また、前記ウォーターネットの下方が開放されているものである。   Moreover, the lower part of the water net is opened.

また、地上に三脚パイプを設置し、該三脚パイプの上方にセイフティブロックを吊り下げたものである。   Also, a tripod pipe is installed on the ground, and a safety block is suspended above the tripod pipe.

請求項1に記載の下水路系内作業安全装置は、簡単なシステムを一時的に容易に施工することができると共にマンホール内及び下水路内全域で作業者が安全で安心し、作業ができる下水路系内作業安全装置となる。   In the sewer system work safety device according to claim 1, a simple system can be temporarily and easily constructed, and the worker can safely and safely work in the manhole and the entire sewer channel. Work safety device in the waterway system.

また、請求項2に記載の下水路系内作業安全装置は、前記請求項1の効果に加え、暗いマンホール内の梯子の昇降でも足・手掛けのホールド巾が反射体により確立されると共に下水路内の水流の上下流が確認でき、より安全で安心な作業及び昇降ができる下水路系内作業安全装置となる。   Further, in the sewer system work safety device according to claim 2, in addition to the effect of claim 1, the hold width of the foot and the handle is established by the reflector even when the ladder in the dark manhole is raised and lowered. It is possible to confirm the upstream and downstream of the inner water flow, and it is a work safety device in the sewage system that can perform safer and more reliable work and lift.

また、請求項3に記載の下水路系内作業安全装置は、前記請求項1の効果に加え、下水路内に流れるゴミ等のウォーターネットへの付着を防止し、下水路内の水流の妨げを無くすことが可能となり作業の安全性に繋がる下水路系内作業安全装置となる。   In addition to the effect of the first aspect, the work safety device in the sewage system according to claim 3 prevents the dust flowing in the sewage channel from adhering to the water net and obstructs the water flow in the sewage channel. Therefore, the work safety device in the sewage system is connected to work safety.

また、請求項4に記載の下水路系内作業安全装置は、前記請求項1の効果に加え、マンホールが深いものであっても作業者の梯子からの墜落をより確実に防止し、作業者は梯子上の作業をより安心して行える下水路系内作業安全装置となる。   In addition to the effect of claim 1, the work safety device in the sewer system according to claim 4 more reliably prevents the worker from falling from the ladder even if the manhole is deep. Will be a work safety device in the sewer system that can work on the ladder more safely.

本発明に係る下水路系内作業安全装置を下水路系の一部に設置した概略説明図である。BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic explanatory drawing which installed the sewer system internal work safety device which concerns on this invention in a part of sewer system. 下水路が円管である断面概略図である。It is a cross-sectional schematic diagram whose sewer is a circular pipe. 梯子固定部の拡大斜視図である。It is an expansion perspective view of a ladder fixing | fixed part. セイフティブロックの設置説明斜視図である。It is an installation explanation perspective view of a safety block.

マンホール内のアンカーボルトに吊り下げられるブラケットを有する合成樹脂製の梯子をマンホール入口から下水路内の底面に達するように配置し、該梯子に沿ってマンホール内にレスキューロープをフックにより吊り下げ、前記下水路の下流側に人体を受け止めるウォーターネットを張設すると共に下水路の側壁に少なくとも前記マンホール底部からウォーターネットに至るレスキューロープをフックにより張設した下水路系内作業安全装置である。   A synthetic resin ladder having a bracket suspended from an anchor bolt in a manhole is arranged so as to reach the bottom surface in the sewer from the manhole entrance, and the rescue rope is suspended in the manhole along the ladder by a hook, A work safety device in the sewer system, in which a water net that catches a human body is stretched on the downstream side of the sewer, and a rescue rope extending from at least the bottom of the manhole to the water net is stretched by a hook on the side wall of the sewer.

図1ないし図4は本発明の実施例に関するものであり、図1は下水路系内作業安全装置を下水路系の一部に設置した概略説明図、図2は下水路が円管である断面概略図、図3は梯子固定部の拡大斜視図、図4はセイフティブロックの設置説明斜視図である。   1 to 4 relate to an embodiment of the present invention, FIG. 1 is a schematic explanatory diagram in which a work safety device in a sewer system is installed in a part of the sewer system, and FIG. 2 is a sewer having a circular pipe. FIG. 3 is a schematic cross-sectional view, FIG. 3 is an enlarged perspective view of a ladder fixing portion, and FIG. 4 is an installation explanatory perspective view of a safety block.

図において、1はマンホールであり、該マンホール1の底部には略水平状に配置された下水路2が接続されている。
前記下水路2は、図1に示すような角管または図2に示すような円管である。
In the figure, reference numeral 1 denotes a manhole, and a sewer channel 2 arranged substantially horizontally is connected to the bottom of the manhole 1.
The sewer 2 is a square tube as shown in FIG. 1 or a circular tube as shown in FIG.

3は合成樹脂製の梯子であり、該梯子3には金属製のブラケット4が梯子3の縦桟5,5間に一定間隔で設置されている。
前記ブラケット4の中央部下方には逆U字状の孔6が穿設され、該孔6にアンカーボルト7をマンホール1の内壁に打ち込むことにより、梯子3はマンホール1の入口から下水路2内の底面に達するように固定配置されている。
3 is a ladder made of synthetic resin, and metal brackets 4 are installed on the ladder 3 at regular intervals between the vertical bars 5 and 5 of the ladder 3.
An inverted U-shaped hole 6 is formed below the center of the bracket 4, and an anchor bolt 7 is driven into the inner wall of the manhole 1 in the hole 6. It is fixedly arranged so as to reach the bottom surface.

8はレスキューロープであり、該レスキューロープ8は前記梯子3に沿ってマンホール1の内壁に打ち込まれたフック9,9によりマンホール内に吊り下げられている。   Reference numeral 8 denotes a rescue rope, and the rescue rope 8 is suspended in the manhole by hooks 9, 9 which are driven into the inner wall of the manhole 1 along the ladder 3.

10は強化繊維(例えばナイロン)製のウォーターネットであり、該ウォーターネット10は前記下水路2の下流側で人体(作業者)を受け止めることができるように、下水路2の内壁に打ち込まれた複数のフック9,9,…で張設されている。
なお、前記ウォーターネット10は、図1に示すような四角形または図2に示すような多角形(例えば六角形)または円形など下水路2の形状に合わせてウォーターネット10の形状で使用することが可能である。
10 is a water net made of reinforcing fiber (for example, nylon), and the water net 10 is driven into the inner wall of the sewer 2 so that a human body (operator) can be received downstream of the sewer 2. It is stretched by a plurality of hooks 9, 9,.
The water net 10 may be used in the shape of the water net 10 in accordance with the shape of the sewer 2 such as a quadrangle as shown in FIG. 1 or a polygon (for example, hexagon) or a circle as shown in FIG. Is possible.

11は下水路2内に張設されるレスキューロープであり、該レスキューロープ11は前記下水路2の側壁に少なくとも前記マンホール1の底部から前記ウォーターネット10に至るまでフック9,9により張設されている。   11 is a rescue rope stretched in the sewer 2, and the rescue rope 11 is stretched on the side wall of the sewer 2 by hooks 9, at least from the bottom of the manhole 1 to the water net 10. ing.

以上のような構成からなる下水路系内作業安全装置は、マンホール1内及びマンホール1の底部に接続され略水平状に配置された下水路2内を補修,点検する際、特に内周を補修する際に、一時的に施工する事により事故を防ぎ、作業を安全にするものである。
上述のように梯子3はブラケット4に穿設された孔6にアンカーボルト7を打ち込むことにより、マンホール1の内壁に簡単に固定されると共にマンホール1内に工事用機器等を搬入する場合には梯子3を容易に外すことができるものである。
The work safety device in the sewer system constructed as described above is repaired especially in the inner circumference when repairing and inspecting the manhole 1 and the inside of the sewer channel 2 connected to the bottom of the manhole 1 and arranged substantially horizontally. When doing so, accidents can be prevented and the work can be made safer by constructing temporarily.
As described above, the ladder 3 is easily fixed to the inner wall of the manhole 1 by driving the anchor bolt 7 into the hole 6 drilled in the bracket 4, and when carrying construction equipment or the like into the manhole 1. The ladder 3 can be easily removed.

また、前記レスキューロープ8にスライドタイプの落下防止機器12の一端側を設置し、他端側を梯子3を昇降する作業者Aが装着する安全帯ハーネスタイプ13に掛けることにより、万が一事故等が起きた場合にはレスキューロープ8に設置したスライドが瞬時にストッパーとなり作業者Aの墜落を防止し、作業者Aは梯子3上の作業を安心して行えるものとなる。   Also, by installing one end side of the slide type fall prevention device 12 on the rescue rope 8 and hanging the other end on the safety belt harness type 13 worn by the worker A who moves up and down the ladder 3, an accident or the like occurs. In this case, the slide installed on the rescue rope 8 becomes a stopper instantly to prevent the worker A from falling, and the worker A can perform the work on the ladder 3 with peace of mind.

そして、前記下水路2内の作業においては、前記レスキューロープ11に作業者Bが装着する安全帯ベルトタイプ14から延びるフックを挿通することにより、作業者Bは下水路2内の作業を安心して行えるものとなる。
万が一事故等が起きた場合には、前記下水路2内に張設されたウォーターネット10により人体を受け止め瞬時に救出することができるものである。
また、ウォーターネット10の設置は複数のフック9,9,…で固定していることにより簡単に脱着が可能である。
In the work in the sewer 2, the worker B can safely work in the sewer 2 by inserting a hook extending from the safety belt type 14 worn by the worker B into the rescue rope 11. It can be done.
In the unlikely event of an accident or the like, the human body can be received and rescued instantly by the water net 10 stretched in the sewer 2.
Further, the water net 10 can be easily attached and detached by being fixed by a plurality of hooks 9, 9,.

このように設置された下水路系内作業安全装置は、マンホール内及び下水路内の全域で作業者が安全で安心し、作業ができるものとなる。   The work safety device in the sewer system installed in this way enables the worker to work safely and with peace of mind throughout the manhole and the entire sewer.

なお、本実施例において、マンホール1の昇降に梯子3を使用したが、複数のステップを使用することにより固定箇所の自由さを可能とするものである。   In this embodiment, the ladder 3 is used for raising and lowering the manhole 1. However, the use of a plurality of steps enables freedom of the fixed portion.

また、図3に示すように、前記梯子3の横桟15,15,…の両端に左右で色が異なる反射体(例えば左が緑色で右が赤色)16,17を設置し、緑色の反射体16は下水路2の下流側の印と、赤色の反射体17は上流側の印とすることができる。   Further, as shown in FIG. 3, reflectors 16 and 17 having different colors on the left and right (for example, green on the left and red on the right) 16 and 17 are installed at both ends of the horizontal rails 15, 15,. The body 16 can be a mark on the downstream side of the sewer 2 and the red reflector 17 can be a mark on the upstream side.

この場合、暗いマンホール1内の梯子3の昇降でも足・手掛けのホールド巾が反射体16,17により確立されると共に下水路2内の水流の上下流が確認でき、より安全で安心な作業及び昇降ができるものとなる。   In this case, even when the ladder 3 in the dark manhole 1 is raised or lowered, the foot / hand hold width is established by the reflectors 16 and 17, and the upstream and downstream of the water flow in the sewer 2 can be confirmed. It can be moved up and down.

また、図1に示すように、前記ウォーターネット10の下方を開放させることにより、下水路2内に流れるゴミ等のウォーターネット10への付着を防止し、下水路2内の水流の妨げを無くすことが可能となり作業の安全性に繋がることとなる。   Also, as shown in FIG. 1, by opening the lower part of the water net 10, it is possible to prevent the dust flowing in the sewer 2 from adhering to the water net 10, and to obstruct the water flow in the sewer 2. It becomes possible to lead to the safety of work.

さらに、図4に示すように、地上に三脚パイプ18を設置し、該三脚パイプ18の上方にセイフティブロック19を吊り下げ、該セイフティブロック19に接続されているフックを作業者Cが装着する安全帯ハーネスタイプ13に掛けるものとする。   Furthermore, as shown in FIG. 4, a tripod pipe 18 is installed on the ground, a safety block 19 is suspended above the tripod pipe 18, and a worker C wears a hook connected to the safety block 19. It shall be hung on the belt harness type 13.

この場合、マンホール1が深いものであっても作業者Cの梯子3からの墜落をより確実に防止し、作業者Cは梯子3上の作業をより安心して行えるものとなる。   In this case, even if the manhole 1 is deep, the worker C can be reliably prevented from falling from the ladder 3, and the worker C can perform the work on the ladder 3 with more peace of mind.

1 マンホール
2 下水路
3 梯子
4 ブラケット
7 アンカーボルト
8,11 レスキューロープ
9 フック
10 ウォーターネット
15 横桟
16,17 反射体
18 三脚パイプ
19 セイフティブロック
DESCRIPTION OF SYMBOLS 1 Manhole 2 Sewer 3 Ladder 4 Bracket 7 Anchor bolt 8, 11 Rescue rope 9 Hook 10 Water net 15 Horizontal beam 16, 17 Reflector 18 Tripod pipe 19 Safety block

Claims (4)

マンホール内及びマンホールの底部に接続され略水平状に配置された下水路内を補修,点検する下水路系内作業安全装置において、マンホール内のアンカーボルトに吊り下げられるブラケットを有する合成樹脂製の梯子をマンホール入口から下水路内の底面に達するように配置し、該梯子に沿ってマンホール内にレスキューロープをフックにより吊り下げ、前記下水路の下流側に人体を受け止めるウォーターネットを張設すると共に下水路の側壁に少なくとも前記マンホール底部からウォーターネットに至るレスキューロープをフックにより張設したことを特徴とする下水路系内作業安全装置。   A synthetic resin ladder having brackets suspended on anchor bolts in a manhole in a work safety device in a sewer system that repairs and inspects the manhole and the inside of a sewer that is connected to the bottom of the manhole and arranged in a substantially horizontal shape. Is placed so as to reach the bottom of the sewer from the entrance of the manhole, and a rescue rope is suspended in the manhole along the ladder by a hook, and a water net for receiving a human body is stretched downstream of the sewer. A work safety device in a sewer system, wherein a rescue rope extending from at least the bottom of the manhole to a water net is stretched by a hook on a side wall of the water channel. 前記梯子の横桟の両端に左右の色が異なる反射体を設置したことを特徴とする請求項1に記載の下水路系内作業安全装置。   The work safety device in a sewage system according to claim 1, wherein reflectors having different left and right colors are installed at both ends of the horizontal rail of the ladder. 前記ウォーターネットの下方が開放されていることを特徴とする請求項1に記載の下水路系内作業安全装置。   The work safety device in the sewage system according to claim 1, wherein a lower portion of the water net is opened. 地上に三脚パイプを設置し、該三脚パイプの上方にセイフティブロックを吊り下げたことを特徴とする請求項1に記載の下水路系内作業安全装置。
The work safety device in the sewer system according to claim 1, wherein a tripod pipe is installed on the ground, and a safety block is suspended above the tripod pipe.
JP2009211776A 2009-09-14 2009-09-14 Work safety device in sewer system Expired - Fee Related JP5324366B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009211776A JP5324366B2 (en) 2009-09-14 2009-09-14 Work safety device in sewer system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009211776A JP5324366B2 (en) 2009-09-14 2009-09-14 Work safety device in sewer system

Publications (2)

Publication Number Publication Date
JP2011058323A true JP2011058323A (en) 2011-03-24
JP5324366B2 JP5324366B2 (en) 2013-10-23

Family

ID=43946253

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009211776A Expired - Fee Related JP5324366B2 (en) 2009-09-14 2009-09-14 Work safety device in sewer system

Country Status (1)

Country Link
JP (1) JP5324366B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102560655B1 (en) * 2023-04-05 2023-07-27 한국유지건설(주) Shoulder-mounted safety device for sewage culvert repair work
KR102579544B1 (en) * 2023-04-05 2023-09-15 장미경 Self-supporting safety device for sewage culvert repair work

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61146586U (en) * 1985-02-28 1986-09-10
JPH0663646U (en) * 1991-01-11 1994-09-09 藤井電工株式会社 Fall prevention device for manhole ladder
JP2000144700A (en) * 1998-11-06 2000-05-26 Nakada Sangyo Kk Marker body/flowing object recovery device for river or irrigation channel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61146586U (en) * 1985-02-28 1986-09-10
JPH0663646U (en) * 1991-01-11 1994-09-09 藤井電工株式会社 Fall prevention device for manhole ladder
JP2000144700A (en) * 1998-11-06 2000-05-26 Nakada Sangyo Kk Marker body/flowing object recovery device for river or irrigation channel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102560655B1 (en) * 2023-04-05 2023-07-27 한국유지건설(주) Shoulder-mounted safety device for sewage culvert repair work
KR102579544B1 (en) * 2023-04-05 2023-09-15 장미경 Self-supporting safety device for sewage culvert repair work

Also Published As

Publication number Publication date
JP5324366B2 (en) 2013-10-23

Similar Documents

Publication Publication Date Title
KR200480751Y1 (en) Apparatus for preventing falling into manhole
JP5324366B2 (en) Work safety device in sewer system
JP6273328B1 (en) Installation method of temporary closing structure used for bridge pier repair and reinforcement work
KR101539412B1 (en) Bridge disassemble method
KR100944458B1 (en) Apparatus preventing separation of cage for construction
JP2019090253A (en) Slide type scattering prevention device
KR102134641B1 (en) Adjust height for raise ring manhole cover
JP5351750B2 (en) Intermediate slab for pump installed manhole
KR200367314Y1 (en) A safety apparatus for an anti-fall of a worker
KR101270731B1 (en) Connecting apparatus of vertical protection net for forconstruction
KR100760182B1 (en) Dvice carring guard camera in the sewer pipe
KR101022463B1 (en) Connecting structure of vertical protection net for construction
JP3107458U (en) Work floor for shaft construction and its mounting device
ES2751757T3 (en) Safety structure to carry out maintenance operations on a wind turbine and procedure for its installation
JP2004232366A (en) Suspended scaffolding
KR200284897Y1 (en) A construction guardrail pole for ship
JP5377361B2 (en) Net extension device for steel pipe support
KR200326582Y1 (en) A locking device of a manhole safety net
KR101781395B1 (en) Device for protecting a falling accident of opening
KR100812130B1 (en) A safety net using lifesaving rope
KR101785682B1 (en) A Safe manhole cover with detachable attachment
KR102050743B1 (en) Mold for construction of bridge drain and construction method using the mold
JP2019085690A (en) Inspection work bench of dust collector
JP3132479U (en) Manhole lifting tool
KR200277868Y1 (en) A net support frame under construction

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20120911

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20121228

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130118

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20130118

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20130619

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20130702

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20130718

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees