JP3786600B2 - How to build a culvert - Google Patents

How to build a culvert Download PDF

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Publication number
JP3786600B2
JP3786600B2 JP2001374278A JP2001374278A JP3786600B2 JP 3786600 B2 JP3786600 B2 JP 3786600B2 JP 2001374278 A JP2001374278 A JP 2001374278A JP 2001374278 A JP2001374278 A JP 2001374278A JP 3786600 B2 JP3786600 B2 JP 3786600B2
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Japan
Prior art keywords
culvert
curve
underdrain
constructed
paved road
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JP2001374278A
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JP2003171974A (en
Inventor
一英 田浦
康博 山本
聖 森
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Nishimatsu Construction Co Ltd
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Nishimatsu Construction Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/60Planning or developing urban green infrastructure

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Description

【0001】
【発明の属する技術分野】
本発明は、暗渠の構築方法に係り、詳細にはプレキャストコンクリートで作製された暗渠の構築方法に関する。
【0002】
【従来の技術】
従来より、カルバート、水路、擁壁等に使用されるプレキャストコンクリートは、幾種類かの規格品を作製しておき、用途に応じて適宜利用されている。例えば、図4に示すように、道路舗装面100aから流れる雨、雪等の流水を効率良く集水するコンクリート製暗渠ブロック150がある。このようなコンクリート製暗渠ブロック150としては、特開平11−280015号公報に記載された技術が知られている。この技術は、雨、雪等の流水を集水するために、道路舗装面100aの横断勾配101と一致するように幅方向の上面150aを傾斜させた暗渠150を水平な底盤110上に敷設したものである。
【0003】
【発明が解決しようとする課題】
しかしながら、前記公報の技術では、道路舗装面100aの横断勾配101が道路の曲率によって約1.5%〜3%と変化する場合、図4に示すように、暗渠150の上面150aを道路舗装面100aの横断勾配101に一致させて設計するとともに、その設計条件に合わせて暗渠150を作製しなければならない。よって、暗渠150の作製には所定の期間を要し、プレキャストコンクリートの利点である工期の短縮を十分に果たすことができなかった。
【0004】
また、図5に示すように、舗装道路260下に埋設され、水路等として使用される暗渠250は、地盤中に水平に敷設されている。この場合、舗装道路260下に、該舗装道路260のカーブに沿って暗渠250を構築すると、この暗渠250の長手方向の内部に設けられた流水孔265では、この流水孔265内の流水が該カーブに沿って流れるようになる。ところが、この流水が該カーブに沿って流れると、この流水をカーブの外側に向かって流そうとする遠心力が発生することにより、この流水がカーブの外側に片寄り、流水孔265内で片流れを起こし、流水孔265の壁面を局部的に侵食する恐れがある。
【0005】
本発明は上記事情に鑑みてなされたものであり、底盤の上面を幅方向に適宜傾斜させることによって、暗渠の流水孔内での片流れを容易に防止することができる暗渠の構築方法を提供することを目的としている。
【0008】
【課題を解決するための手段】
以上の課題を解決するため、請求項1記載の発明は、例えば、図2および図3に示すように、舗装道路10に、該舗装道路10のカーブに沿って暗渠を構築する暗渠30の構築方法であって、前記暗渠30が構築される凹所40の底部40aに、上面60aが水平面に対してカーブの内側に傾斜する底盤60を施工し、この底盤60の上面60aに、暗渠30を設けることを特徴とする。
【0009】
請求項1記載の発明によれば、上面が水平面に対してカーブの内側に傾斜する底盤を施工し、この底盤の上面に、暗渠を設けることによって、この暗渠の長手方向の内部に設けられた流水孔では、流水が該カーブに沿って流れることにより、カーブの外側に向かって流水を流そうとする遠心力が発生するとともに、カーブの内側に向かって流水を流そうとする重力が作用する。したがって、流水孔内の流水は、該遠心力と重力とが釣り合って、カーブの外側方向で片流れを起こさず、流水孔の壁面を局部的に侵食することがない。
【0010】
請求項2記載の発明は、例えば、図4に示すように、請求項1記載の暗渠30の構築方法において、前記暗渠30がプレキャストコンクリート製であり、前記底盤60の上面60aに暗渠30を設置することを特徴とする。
【0011】
請求項2記載の発明によれば、暗渠がプレキャストコンクリート製であり、底盤の上面に暗渠を設置することによって、現場でコンクリートを打設することなく、容易に暗渠を構築することができる。したがって、暗渠を構築するのに要する工期を短縮することができる。
【0012】
【発明の実施の形態】
以下、図1および図2を参照して本発明の実施の形態を詳細に説明する。
(第1の実施の形態)
第1の実施の形態は、図1に示すように、舗装道路1の横断方向端部に暗渠3を構築する暗渠の構築方法である。
暗渠3は、断面視矩形状の長尺なプレキャストコンクリート製であって、その長手方向の内部には断面視円形状の流水孔8が設けられている。
【0013】
まず、舗装道路1と舗道21とを区別する縁石20に沿って地盤15を掘削し、暗渠3が構築される凹所4を構築する。この凹所4の幅は暗渠3の幅より十分に広くする。そして、この凹所4の底部4aに、上面6aが道路舗装面1aの横断勾配5とほぼ等しい底盤6を施工する。この底盤6は、現場で底部4a上に割栗石6b等を敷詰め、ランマー等でこの割栗石6bを締め固めた後、この割栗石6b等上に捨てコンクリート6cを打設することや砂敷きを行うことによって構築される。
次に、底盤6の上面6aに暗渠3の丁張りや墨出しをし、その丁張りや墨出しで測定された線に沿って暗渠3をその上面3aが道路舗装面1aとほぼ面一になるように底盤6の上面6aに設置する。そして、凹所4と暗渠3との隙間に土砂等を埋め戻す。
【0014】
以上により、第1の実施の形態によれば、上面6aの勾配が横断勾配5とほぼ等しい底盤6を現場で施工し、この底盤6の上面6aに、プレキャストコンクリート製の暗渠3をその上面3aが道路舗装面1とほぼ面一になるように設置することによって、現場でコンクリートを打設することなく、容易に暗渠3を構築することができる。また、道路舗装面1の横断勾配5が道路の曲率によって約1.5%〜3%と変化する場合であっても、その横断勾配5と底盤6の上面勾配とがほぼ等しいので、暗渠3の上面3aを道路舗装面1と容易に面一にできる。したがって、道路舗装面1aの横断勾配5が変化するたびに、新たな暗渠3を設計することやその設計条件に合わせて新たな暗渠3を作製することがなくなり、暗渠3を構築するのに要する工期を短縮することができる。
【0015】
(第2の実施の形態)
第2の実施の形態は、図2および図3に示すように、舗装道路10に、該舗装道路10のカーブに沿って暗渠30を構築する暗渠の構築方法である。
暗渠30は、断面視矩形状の長尺なプレキャストコンクリート製であって、その長手方向の内部には断面視ロ形状の流水孔80が設けられている。
【0016】
まず、舗装道路10のカーブに沿って地盤25を掘削し、暗渠30が構築される凹所40を構築する。その際に、図2中の二点鎖線で示すように、この凹所40の幅は暗渠30の幅より十分に広くするとともに、その深さは暗渠30の深さより十分に深くする。そして、この凹所40の底部40aに、上面60aが水平面に対してカーブの内側に傾斜する底盤60を施工する。この底盤60は、第1の実施の形態と同様にして構築される。次に、第1の実施の形態と同様にして、底盤60の上面60aに墨出し等をし、その墨出し等で測定された線に沿って暗渠30を底盤60の上面60aに設置する。そして、凹所40と暗渠30との隙間および暗渠30の上面に土砂等を埋め戻す。
【0017】
以上により、第2の実施の形態によれば、第1の実施の形態と同様の効果の他に、上面60が水平面に対してカーブの内側に傾斜する底盤60を現場で施工し、この底盤60の上面60aに、プレキャストコンクリート製の暗渠30を設置することによって、この暗渠30の流水孔80では、流水50が該カーブに沿って流れることにより、カーブの外側に向かって流水50を流そうとする遠心力が発生するとともに、カーブの内側に向かって流水50を流そうとする重力が作用する。したがって、流水孔80内の流水50は、該遠心力と重力とが釣り合って、カーブの外側方向で片流れを起こさず、流水孔80の壁面を局部的に侵食することがない。
【0019】
【発明の効果】
請求項1記載の発明によれば、上面が水平面に対してカーブの内側に傾斜する底盤を施工し、この底盤の上面に、暗渠を設けることによって、この暗渠の流水孔では、流水が該カーブに沿って流れることにより、カーブの外側に向かって流水を流そうとする遠心力が発生するとともに、カーブの内側に向かって流水を流そうとする重力が作用する。したがって、流水孔内の流水は、カーブの外側方向で片流れを起こさず、流水孔の壁面を局部的に侵食することがない。
【0020】
請求項2記載の発明によれば、請求項1記載の発明と同様の効果を得られることは勿論のこと、暗渠がプレキャストコンクリート製であり、底盤の上面に暗渠を設置することによって、現場でコンクリートを打設することなく、容易に暗渠を構築することができ、工期の短縮を図ることができる。
【図面の簡単な説明】
【図1】本発明の実施の形態の一例を示すもので、舗装道路の横断方向端部に構築された暗渠の断面図である。
【図2】同、舗装道路に、該舗装道路のカーブに沿って構築された暗渠の断面図である。
【図3】同、舗装道路に、該舗装道路のカーブに沿って構築された暗渠の平面図である。
【図4】従来の舗装道路の横断方向端部に構築された暗渠の断面図である。
【図5】従来の舗装道路に、該舗装道路のカーブに沿って構築された暗渠の断面図である。
【符号の説明】
1、10 舗装道路
1a、10a 道路舗装面
2 横断方向端部
3、30 暗渠
4、40 凹所
4a、40a 底部(凹所)
5 横断勾配
6、60 底盤
6a、60a 上面(底盤)
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a culvert, and more particularly to a method for constructing a culvert made of precast concrete.
[0002]
[Prior art]
Conventionally, precast concrete used for culverts, waterways, retaining walls, and the like has been prepared several kinds of standard products and used as appropriate according to the application. For example, as shown in FIG. 4, there is a concrete culvert block 150 that efficiently collects water such as rain and snow flowing from a road pavement surface 100a. As such a concrete culvert block 150, a technique described in JP-A-11-280015 is known. In this technique, in order to collect running water such as rain, snow, etc., a culvert 150 having an inclined upper surface 150a in the width direction so as to coincide with the transverse gradient 101 of the road pavement surface 100a is laid on a horizontal bottom plate 110. Is.
[0003]
[Problems to be solved by the invention]
However, according to the technique of the above publication, when the cross slope 101 of the road pavement surface 100a changes from about 1.5% to 3% depending on the curvature of the road, as shown in FIG. While designing to match the transverse gradient 101 of 100a, the underdrain 150 must be produced according to the design conditions. Therefore, a predetermined period was required for producing the underdrain 150, and the construction period, which is an advantage of the precast concrete, could not be sufficiently shortened.
[0004]
Moreover, as shown in FIG. 5, the underdrain 250 buried under the paved road 260 and used as a waterway or the like is laid horizontally in the ground. In this case, when the underdrain 250 is constructed along the curve of the underpaved road 260 under the paved road 260, in the flowing hole 265 provided in the longitudinal direction of the underdrain 250, the flowing water in the flowing hole 265 is It begins to flow along the curve. However, when the flowing water flows along the curve, a centrifugal force is generated to flow the flowing water toward the outside of the curve, so that the flowing water is shifted to the outside of the curve and flows in the flowing hole 265. And the wall surface of the water flow hole 265 may be locally eroded.
[0005]
The present invention has been made in view of the above circumstances, and provides a method of constructing a culvert that can easily prevent a single flow in a culvert of a culvert by appropriately inclining the upper surface of the bottom board in the width direction. The purpose is that.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the invention described in claim 1 is, for example, as shown in FIGS. 2 and 3, construction of a culvert 30 that constructs a culvert along a curve of the paved road 10 on a paved road 10. In the method, a bottom plate 60 having an upper surface 60a inclined to the inside of a curve with respect to a horizontal plane is applied to the bottom 40a of the recess 40 where the underdrain 30 is constructed, and the underdrain 30 is formed on the upper surface 60a of the bottom plate 60. It is characterized by providing.
[0009]
According to the first aspect of the present invention, the bottom surface is provided in the longitudinal direction of the underdrain by constructing the bottom surface in which the upper surface is inclined to the inside of the curve with respect to the horizontal plane and providing the undersurface on the upper surface of the bottom surface. In the flow hole, the flowing water flows along the curve, thereby generating a centrifugal force that tries to flow the water toward the outside of the curve and the gravity that tries to flow the water toward the inside of the curve. . Therefore, the flowing water in the water flow hole balances the centrifugal force and the gravity, does not cause a single flow in the outer direction of the curve, and does not erode the wall surface of the water flow hole locally.
[0010]
The invention according to claim 2 is, for example, as shown in FIG. 4, in the method for constructing a culvert 30 according to claim 1, the culvert 30 is made of precast concrete, and the culvert 30 is installed on the upper surface 60 a of the bottom plate 60. It is characterized by doing.
[0011]
According to the second aspect of the present invention, the underdrain is made of precast concrete, and by installing the underdrain on the upper surface of the bottom board, the underdrain can be easily constructed without placing concrete on site. Therefore, the construction period required for constructing the underdrain can be shortened.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
(First embodiment)
1st Embodiment is the construction method of the underdrain which constructs the underdrain 3 in the cross direction edge part of the paved road 1, as shown in FIG.
The underdrain 3 is made of long precast concrete having a rectangular shape in cross section, and a water flow hole 8 having a circular shape in cross section is provided inside the longitudinal direction.
[0013]
First, the ground 15 is excavated along the curb 20 that distinguishes the paved road 1 and the paved road 21 to construct the recess 4 in which the underdrain 3 is constructed. The width of the recess 4 is made sufficiently wider than the width of the underdrain 3. Then, on the bottom 4a of the recess 4, a bottom board 6 is constructed in which the upper surface 6a is substantially equal to the transverse gradient 5 of the road pavement surface 1a. This bottom plate 6 is laid with cracked stone 6b and the like on the bottom 4a at the site, and after crushing the broken stone 6b with a rammer or the like, abandoned concrete 6c is placed on the cracked stone 6b or sanded. Built by doing.
Next, the undercarriage 6 is stretched or inked on the upper surface 6a of the bottom board 6, and the upper surface 3a of the undercarriage 3 is substantially flush with the road pavement surface 1a along the line measured by the tensioning or inking. It installs in the upper surface 6a of the base 6 so that it may become. And earth and sand etc. are refilled in the gap between the recess 4 and the underdrain 3.
[0014]
As described above, according to the first embodiment, the bottom plate 6 having the upper surface 6a having the gradient substantially equal to the transverse gradient 5 is constructed on the site, and the undercast 3 made of precast concrete is applied to the upper surface 6a of the bottom plate 6 on the upper surface 3a. Is installed so as to be substantially flush with the road pavement surface 1, it is possible to easily construct the underdrain 3 without placing concrete on the site. Even when the crossing gradient 5 of the road pavement surface 1 changes from about 1.5% to 3% depending on the curvature of the road, the crossing gradient 5 and the top surface gradient of the bottom board 6 are almost equal. Can be easily flush with the road pavement surface 1. Therefore, every time the crossing gradient 5 of the road pavement surface 1a changes, it is not necessary to design a new culvert 3 or to create a new culvert 3 according to the design conditions, and to construct the culvert 3 The construction period can be shortened.
[0015]
(Second Embodiment)
2 and 3, the second embodiment is a method for constructing a culvert that constructs a culvert 30 on a paved road 10 along a curve of the paved road 10. As shown in FIG.
The underdrain 30 is made of long precast concrete having a rectangular shape in cross section, and a water flow hole 80 having a cross-sectional shape in the longitudinal direction is provided inside the longitudinal direction.
[0016]
First, the ground 25 is excavated along the curve of the paved road 10, and the recess 40 where the underdrain 30 is constructed is constructed. At this time, as indicated by a two-dot chain line in FIG. 2, the width of the recess 40 is made sufficiently wider than the width of the underdrain 30 and the depth thereof is made sufficiently deeper than the depth of the underdrain 30. And the bottom board 60 in which the upper surface 60a inclines inside a curve with respect to a horizontal surface in the bottom part 40a of this recess 40 is constructed. The bottom board 60 is constructed in the same manner as in the first embodiment. Next, in the same manner as in the first embodiment, marking is performed on the upper surface 60a of the bottom board 60, and the underdrain 30 is installed on the upper surface 60a of the bottom board 60 along the line measured by the marking. And the earth and sand etc. are refilled in the clearance gap between the recess 40 and the underdrain 30 and the upper surface of the underdrain 30.
[0017]
As described above, according to the second embodiment, in addition to the same effects as those of the first embodiment, the bottom plate 60 in which the upper surface 60 is inclined to the inside of the curve with respect to the horizontal plane is constructed on the site. By installing the culvert 30 made of precast concrete on the upper surface 60a of the culvert 60, the flowing water 50 flows along the curve in the flowing water hole 80 of the culvert 30 so that the flowing water 50 flows toward the outside of the curve. The gravity force which tries to flow the flowing water 50 toward the inner side of the curve acts. Therefore, the flowing water 50 in the flowing water hole 80 balances the centrifugal force and gravity, does not cause a single flow in the outer direction of the curve, and does not erode the wall surface of the flowing water hole 80 locally.
[0019]
【The invention's effect】
According to the first aspect of the present invention, by constructing a bottom plate whose upper surface is inclined to the inside of the curve with respect to the horizontal plane, and providing a culvert on the upper surface of the bottom plate, the flowing water flows in the curve in the flow hole of the culvert. As a result, the centrifugal force that tries to flow the water toward the outside of the curve is generated, and the gravity that tries to flow the water toward the inside of the curve acts. Therefore, the flowing water in the flowing water hole does not cause a single flow in the outer direction of the curve, and the wall surface of the flowing water hole does not erode locally.
[0020]
According to the second aspect of the invention, the same effect as that of the first aspect of the invention can be obtained, and the underdrain is made of precast concrete. A concrete culvert can be easily constructed without placing concrete, and the construction period can be shortened.
[Brief description of the drawings]
FIG. 1 shows an example of an embodiment of the present invention, and is a cross-sectional view of a culvert constructed at a transverse end of a paved road.
FIG. 2 is a cross-sectional view of a culvert constructed on the paved road along the curve of the paved road.
FIG. 3 is a plan view of a culvert built on the paved road along the curve of the paved road.
FIG. 4 is a cross-sectional view of a culvert constructed at a transverse end of a conventional paved road.
FIG. 5 is a cross-sectional view of a culvert constructed on a conventional paved road along a curve of the paved road.
[Explanation of symbols]
1, 10 Paved road 1a, 10a Road pavement surface 2 Transverse direction end 3, 30 Underdrain 4, 40 Recess 4a, 40a Bottom (recess)
5 Cross slope 6, 60 Bottom board 6a, 60a Upper surface (bottom board)

Claims (2)

舗装道路に、該舗装道路のカーブに沿って暗渠を構築する暗渠の構築方法であって、
前記暗渠が構築される凹所の底部に、上面が水平面に対してカーブの内側に傾斜する底盤を施工し、
この底盤の上面に、暗渠を設けることを特徴とする暗渠の構築方法。
A method of constructing a culvert on a paved road that constructs a culvert along the curve of the paved road,
At the bottom of the recess where the underdrain is constructed, construct a bottom plate whose upper surface is inclined inside the curve with respect to the horizontal plane,
A method of constructing a culvert characterized by providing a culvert on the upper surface of the bottom board.
請求項1記載の暗渠の構築方法において、
前記暗渠がプレキャストコンクリート製であり、前記底盤の上面に暗渠を設置することを特徴とする暗渠の構築方法。
The method of constructing a culvert according to claim 1,
A method of constructing a culvert characterized in that the culvert is made of precast concrete and a culvert is installed on the top surface of the bottom board.
JP2001374278A 2001-12-07 2001-12-07 How to build a culvert Expired - Fee Related JP3786600B2 (en)

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