JP5105906B2 - Groove cover - Google Patents

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JP5105906B2
JP5105906B2 JP2007054452A JP2007054452A JP5105906B2 JP 5105906 B2 JP5105906 B2 JP 5105906B2 JP 2007054452 A JP2007054452 A JP 2007054452A JP 2007054452 A JP2007054452 A JP 2007054452A JP 5105906 B2 JP5105906 B2 JP 5105906B2
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groove
end surface
lid
longitudinal direction
groove lid
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JP2008214974A (en
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頼雄 大場
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Chugoku Electric Power Co Inc
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Chugoku Electric Power Co Inc
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    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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    • Y02A30/60—Planning or developing urban green infrastructure

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Description

本発明は、歩道や道路、建物等の傍に敷設される側溝を着脱自在に覆うための溝蓋に関する。   The present invention relates to a groove lid for detachably covering a side groove laid near a sidewalk, road, building or the like.

側溝は、土砂や塵埃等の異物の侵入を阻止するために、通常、コンクリート製の溝蓋によって覆われており、清掃時等には、その溝蓋が開放状態に立て置かれるか撤去されるかして側溝が開放される。このような側溝では、例えば図４（ａ）に示すように、側溝１の上部両側に形成されたＬ型の蓋受け用の段部２，２に、厚みのある四角形状に形成された溝蓋３が連続して嵌め込まれた状態に配列され、各溝蓋３の長手方向の一端（又は両端）側には、開放時に手を掛けるための凹状の手掛け部４が形成されている。なお、上述のように、厚みのある四角形状の溝蓋３では、段部２，２と溝蓋３の間に土砂が溜まりやすくガタつきが発生しやすいため、溝蓋３の長さ方向の左右下角部に部分的に斜面部、凹面部または凸面部を設けた溝蓋が提案されている（例えば特許文献１参照）。
特開２００３−３２８４２５号公報 The side groove is usually covered with a concrete groove cover to prevent foreign materials such as earth and sand and dust from entering, and the groove cover is left open or removed when cleaning, etc. Thus, the side groove is opened. In such a side groove, for example, as shown in FIG. 4A, the L-shaped lid receiving step portions 2 and 2 formed on both sides of the upper side of the side groove 1 are formed in a thick square shape. The lids 3 are arranged in a continuously fitted state, and a concave handle portion 4 is formed on one end (or both ends) in the longitudinal direction of each groove lid 3 to hold a hand when opened. As described above, in the thick rectangular groove cover 3, earth and sand are likely to accumulate between the stepped portions 2, 2 and the groove cover 3, and rattling is likely to occur. There has been proposed a groove lid in which slope portions, concave portions, or convex portions are partially provided in the left and right lower corners (see, for example, Patent Document 1).
JP 2003-328425 A

図４（ａ）に示すような端面が垂直に形成されている従来の溝蓋３では、開放時に、手掛け部４に手を掛けて一端側を持ち上げると、例えば図４（ｂ）に示すように、他端側３ａが隣接する溝蓋３の一端壁面に摺接しつつ矢印Ａ方向に強制的に摺動させられるが、この時に溝蓋３の他端３ａと段部２，２の間に、溝蓋３の開放を妨げる大きな摩擦抵抗が発生する。特に、溝蓋３と段部２，２の間に土砂が詰まっていると、摩擦抵抗がより一層大きくなって開放作業に大変な労力を要することになる。また、溝蓋３，３同士が土砂によって互いに固着状態になり、専用の工具を用いても容易に持ち上げられないこともあった。あるいは、鉄棒等で無理にこじ上げようとすると、溝蓋３が割れてしまうこともあった。   In the conventional groove lid 3 in which the end face is vertically formed as shown in FIG. 4 (a), when the handle 4 is lifted by putting the hand on the handle portion 4 when opened, for example, as shown in FIG. 4 (b). The other end side 3a is forcibly slid in the direction of the arrow A while being in sliding contact with one end wall surface of the adjacent groove lid 3, and at this time, the other end 3a is interposed between the other end 3a of the groove lid 3 and the step portions 2 and 2. A large frictional resistance that prevents the opening of the groove lid 3 is generated. In particular, if earth and sand are clogged between the groove lid 3 and the stepped portions 2 and 2, the frictional resistance is further increased, and a great effort is required for the opening operation. Further, the groove lids 3 and 3 are fixed to each other by earth and sand, and may not be easily lifted even if a dedicated tool is used. Alternatively, the groove lid 3 may be broken when it is forced to lift it with a horizontal bar or the like.

本発明は、このような実情に鑑みてなされ、たとえ周囲に土砂が詰まっていても容易に持ち上げ側溝を開放することができる溝蓋を提供することを目的とする。   This invention is made | formed in view of such a situation, and it aims at providing the groove cover which can open a raising side groove | channel easily even if earth and sand are clogged up.

（Ａ）第１の本発明は、側溝の上部両側に形成された蓋受け用の段部に着脱自在に嵌め込まれる溝蓋であって、厚みのある四角板状体からなり、前記側溝に沿う長手方向の一端面が、前記段部の水平面に対して鋭角状に傾斜した傾斜面に形成される一方、前記長手方向の他端面が半円弧状に形成されることを特徴とする。
(A) The first aspect of the present invention is a groove lid that is detachably fitted into a lid receiving step formed on both sides of the upper portion of the side groove, and is formed of a thick rectangular plate-like body along the side groove. One end surface in the longitudinal direction is formed as an inclined surface inclined at an acute angle with respect to the horizontal surface of the step portion, and the other end surface in the longitudinal direction is formed in a semicircular arc shape.

このような構成によれば、溝蓋の長手方向の他端面が半円弧状に形成されているので、例えば図２に示すように、一端側を持ち上げた際に、半円弧状の他端面（３２）が、隣接する溝蓋（３）の一端面（３１）に摺接しつつその他端（３ａ）が側溝（１）の段部（２）上をほとんど移動しないため、溝蓋（３）の開放を妨げる摩擦抵抗は少なく、溝蓋（３）の開放が容易になる。   According to such a configuration, since the other end surface in the longitudinal direction of the groove lid is formed in a semicircular arc shape, for example, as shown in FIG. 32) is in sliding contact with one end face (31) of the adjacent groove lid (3), but the other end (3a) hardly moves on the step (2) of the side groove (1), so that the groove lid (3) The frictional resistance that prevents the opening is small, and the opening of the groove lid (3) is facilitated.

これに対して、長手方向の端面が垂直に形成されている従来の溝蓋（３）を持ち上げると、図４（ｂ）で説明したように、溝蓋（３）の他端（３ａ）が矢印Ａ方向にかなり移動するため、溝蓋（３）の開放を妨げる大きな摩擦抵抗が発生するが、本発明の溝蓋では、上述のように、このような溝蓋（３）の他端（３ａ）移動はほとんどないため摩擦抵抗は少ない。   On the other hand, when the conventional groove lid (3) having a longitudinal end face formed vertically is lifted, the other end (3a) of the groove lid (3) is lifted as described with reference to FIG. Since it moves considerably in the direction of arrow A, a large frictional resistance that prevents the opening of the groove lid (3) is generated. However, in the groove lid of the present invention, as described above, the other end of such a groove lid (3) ( 3a) Friction resistance is small because there is almost no movement.

また、例えば図１（ｂ）に示すように、鋭角状の傾斜面に形成される溝蓋（３）の一端面（３１）の上部が、隣接する溝蓋（３）の半円弧状の他端面（３２）の上部に被さるため、両溝蓋（３）（３）間に土砂が堆積しにくくなり、溝蓋（３）（３）同士が固まるのを防ぐことができ、溝蓋（３）を開放する際に、溝蓋（３）を持ち上げやすくなる。   For example, as shown in FIG. 1 (b), the upper portion of one end surface (31) of the groove lid (3) formed on the acute inclined surface is a semicircular arc shape of the adjacent groove lid (3). Since it covers the upper part of the end face (32), it is difficult for sediment to accumulate between the groove lids (3) and (3), and it is possible to prevent the groove lids (3) and (3) from being hardened. ) Is easy to lift the groove lid (3).

（Ｂ）第２の本発明は、側溝の上部両側に形成された蓋受け用の段部に着脱自在に嵌め込まれる溝蓋であって、厚みのある四角板状体からなり、前記側溝に沿う長手方向の一端面の少なくとも上半部分が、前記段部の水平面に対して鋭角状に傾斜した傾斜面に形成される一方、前記長手方向の他端面が半円弧状に形成されることを特徴とする。
(B) The second aspect of the present invention is a groove lid that is detachably fitted into a lid receiving step formed on both sides of the upper portion of the side groove, and is formed of a thick rectangular plate-like body, along the side groove. At least the upper half portion of one end surface in the longitudinal direction is formed as an inclined surface inclined at an acute angle with respect to the horizontal surface of the stepped portion, while the other end surface in the longitudinal direction is formed in a semicircular arc shape. Features.

このような構成によれば、例えば図３（ａ）に示すように、鋭角状の傾斜面に形成される溝蓋（３）の一端面（３１）の上部（３１ａ）が、隣接する溝蓋（３）の半円弧状の他端面（３２）の上部に被さるため、両溝蓋（３）（３）間に土砂が堆積しにくくなり、溝蓋（３）（３）同士が固まるのを防ぐことができ、溝蓋（３）を開放する際に、溝蓋（３）を持ち上げやすくなる。また、溝蓋（３）の長手方向の他端面（３２）が半円弧状に形成されているので、一端側を持ち上げた際に、半円弧状の他端面（３２）の側溝（１）の段部（２）に対する擦抵抗が少なくなるため、溝蓋（３）の開放が容易になる。   According to such a configuration, for example, as shown in FIG. 3A, the upper portion (31a) of the end surface (31) of the groove lid (3) formed on the acute inclined surface is adjacent to the groove lid. Since it covers the upper part of the other end surface (32) of the semicircular arc shape of (3), it is difficult for sediment to accumulate between the groove lids (3) and (3), and the groove lids (3) and (3) are hardened together. It is possible to prevent the groove lid (3) from being lifted when the groove lid (3) is opened. Moreover, since the other end surface (32) in the longitudinal direction of the groove lid (3) is formed in a semicircular arc shape, when the one end side is lifted, the side groove (1) of the other end surface (32) in the semicircular arc shape is formed. Since the frictional resistance against the stepped portion (2) is reduced, the groove lid (3) can be easily opened.

（Ｃ）第３の本発明は、側溝の上部両側に形成された蓋受け用の段部に着脱自在に嵌め込まれる溝蓋であって、厚みのある四角板状体からなり、前記側溝に沿う長手方向の一端面の少なくとも上半部分が、前記段部の水平面に対して鋭角状に傾斜した傾斜面に形成される一方、前記長手方向の他端面の上半部分が、前記長手方向の一端面の傾斜角度と同程度に傾斜した傾斜面に形成され、前記他端面の下半部分が円弧状に形成されることを特徴とする。   (C) The third aspect of the present invention is a groove lid that is detachably fitted into a lid receiving step formed on both sides of the upper portion of the side groove, and is formed of a thick square plate body along the side groove. At least an upper half portion of one end surface in the longitudinal direction is formed as an inclined surface inclined at an acute angle with respect to a horizontal plane of the stepped portion, while an upper half portion of the other end surface in the longitudinal direction is one portion in the longitudinal direction. It is formed in the inclined surface inclined as much as the inclination angle of an end surface, The lower half part of the said other end surface is formed in circular arc shape, It is characterized by the above-mentioned.

このような構成によれば、例えば図３（ｂ）に示すように、溝蓋（３）の長手方向の他端面の下半部分（３２ｂ）が半円弧状に形成されているので、一端側を持ち上げた際の溝蓋（３）の回動動作が円滑になり、側溝（１）の段部（２）に対する抵抗が少なくなるため、溝蓋（３）の開放が容易になる。また、溝蓋（３）の長手方向の他端面の上半部分（３２ａ）が長手方向の一端面（３１）の傾斜角度と同程度に傾斜した傾斜面に形成されるので、溝蓋間の隙間が傾斜方向に形成されるため、両溝蓋（３）（３）間に土砂が堆積しにくくなり、溝蓋（３）（３）同士が固まるのを防ぐことができ、溝蓋（３）を持ち上げやすくなる。   According to such a configuration, for example, as shown in FIG. 3 (b), the lower half portion (32b) of the other end surface in the longitudinal direction of the groove lid (3) is formed in a semicircular arc shape. The groove lid (3) can be smoothly rotated when lifted and the resistance to the step (2) of the side groove (1) is reduced, so that the groove lid (3) can be easily opened. Moreover, since the upper half part (32a) of the other end surface in the longitudinal direction of the groove lid (3) is formed on an inclined surface inclined to the same degree as the inclination angle of the one end surface (31) in the longitudinal direction, Since the gap is formed in the inclined direction, it is difficult for sediment to accumulate between the groove lids (3) and (3), and it is possible to prevent the groove lids (3) and (3) from being hardened. ) Is easier to lift.

（Ｄ）前記各発明にあって、前記側溝に沿う長手方向の両側面が、前記段部の水平面に対して鋭角状に傾斜した傾斜面に形成され、前記両側面と前記段部との間の隙間が上窄まり状に形成されるようにしてもよい。例えば図１（ｃ）に示すように、溝蓋（３）の両側面（３３）と段部（２）との間の隙間が上窄まり状に形成されると、隙間に土砂が詰まりにくくなり、溝蓋（３）を開放する際に、溝蓋（３）を持ち上げやすくなる。
( D ) In each of the inventions, both side surfaces in the longitudinal direction along the side grooves are formed as inclined surfaces inclined at an acute angle with respect to the horizontal surface of the step portion, and between the both side surfaces and the step portion. The gap may be formed in a constricted shape. For example, as shown in FIG. 1 (c), when the gap between the both side surfaces (33) of the groove lid (3) and the stepped portion (2) is formed in a constricted shape, it is difficult for clogging with earth and sand in the gap. Thus, when opening the groove lid (3), the groove lid (3) can be easily lifted.

（Ａ）第１の本発明では、厚みのある四角板状体からなる溝蓋の前記側溝に沿う長手方向の一端面が、溝蓋の上部両側に形成された段部の水平面に対して鋭角状に傾斜した傾斜面に形成される一方、前記長手方向の他端面が半円弧状に形成されるので、一端側を持ち上げた際に、半円弧状の他端面が、隣接する溝蓋の一端面に摺接しつつその他端が側溝の段部上をほとんど移動しないため、溝蓋の開放を妨げる摩擦抵抗は少なく、溝蓋の開放が容易になる。また、鋭角状の傾斜面に形成される溝蓋の一端面の上部が、隣接する溝蓋の半円弧状の他端面の上部に被さるため、両溝蓋間に土砂が堆積しにくくなり、溝蓋同士が固まるのを防ぐことができ、溝蓋を開放する際に、溝蓋を持ち上げやすくなる。
(A) In the first aspect of the present invention, one end surface in the longitudinal direction along the side groove of the groove lid made of a thick square plate-like body is acute with respect to the horizontal surface of the step portion formed on both upper sides of the groove lid. The other end surface in the longitudinal direction is formed in a semicircular arc shape, so that when the one end side is lifted, the other end surface in the semicircular arc shape is formed on the adjacent groove lid. Since the other end hardly slides on the step portion of the side groove while being in sliding contact with the one end surface, there is little frictional resistance that prevents the groove lid from being opened, and the groove lid can be easily opened. In addition, since the upper part of one end surface of the groove cover formed on the acute angled inclined surface covers the upper part of the other semicircular arc-shaped end surface of the adjacent groove cover, it is difficult for sediment to accumulate between the two groove cover, and the groove The lids can be prevented from solidifying, and the groove lid can be easily lifted when the groove lid is opened.

（Ｂ）第２の本発明では、側溝に沿う長手方向の一端面の少なくとも上半部分が、溝蓋の上部両側に形成された段部の水平面に対して鋭角状に傾斜した傾斜面状に形成される一方、前記長手方向の他端面が半円弧状に形成されるので、鋭角状の傾斜面に形成される溝蓋の一端面の上部が、隣接する溝蓋の半円弧状の他端面の上部に被さるため、両溝蓋間に土砂が堆積しにくくなり、溝蓋同士が固まるのを防ぐことができ、溝蓋を開放する際に、溝蓋を持ち上げやすくなる。また、溝蓋の長手方向の他端面が半円弧状に形成されているので、一端側を持ち上げた際に、半円弧状の他端面の側溝の段部に対する摩擦抵抗が少なくなるため、溝蓋の開放が容易になる。
(B) In the second aspect of the present invention, at least the upper half portion of one end surface in the longitudinal direction along the side groove has an inclined surface inclined at an acute angle with respect to the horizontal surface of the step portion formed on both upper sides of the groove lid. On the other hand, since the other end surface in the longitudinal direction is formed in a semicircular arc shape, the upper portion of the one end surface of the groove lid formed on the acute angled inclined surface is in addition to the semicircular arc shape of the adjacent groove lid. Since it covers the upper part of the end surface, it is difficult for sediment to accumulate between the two groove lids, and it is possible to prevent the groove lids from solidifying each other, and it is easy to lift the groove lid when opening the groove lids. In addition, since the other end surface in the longitudinal direction of the groove lid is formed in a semicircular arc shape, when the one end side is lifted, the frictional resistance to the step portion of the side groove on the other semicircular arc end surface is reduced. Is easy to open.

（Ｃ）第３の本発明では、側溝に沿う長手方向の他端面の上半部分が、前記長手方向の一端面の傾斜角度と同程度に傾斜した傾斜面に形成され、前記他端面の下半部分が円弧状に形成されるので、一端側を持ち上げた際の溝蓋の回動動作が円滑になり、側溝の段部に対する抵抗が少なくなるため、溝蓋の開放が容易になる。また、溝蓋の長手方向の他端面の上半部分が長手方向の一端面の傾斜角度と同程度に傾斜した傾斜面に形成されるので、溝蓋間の隙間が傾斜方向に形成されるため、両溝蓋間に土砂が堆積しにくくなり、溝蓋同士が固まるのを防ぐことができ、溝蓋を持ち上げやすくなる。   (C) In the third aspect of the present invention, the upper half portion of the other end surface in the longitudinal direction along the side groove is formed on an inclined surface that is inclined to the same degree as the inclination angle of the one end surface in the longitudinal direction. Since the half portion is formed in an arc shape, the rotation of the groove lid when the one end side is lifted is smooth, and resistance to the step portion of the side groove is reduced, so that the groove lid can be easily opened. In addition, since the upper half of the other end surface in the longitudinal direction of the groove lid is formed on an inclined surface that is inclined to the same degree as the inclination angle of the one end surface in the longitudinal direction, the gap between the groove lids is formed in the inclined direction. The earth and sand are less likely to accumulate between the two groove lids, the groove lids can be prevented from solidifying, and the groove lids can be easily lifted.

以下に、本発明の実施の形態に係る溝蓋について図面を参照しつつ詳細に説明する。
図１（ａ）は溝蓋の斜視図、（ｂ）は溝蓋の配列状態の説明図、（ｃ）は溝蓋の横断面図である。これらの図に示すように、この溝蓋３は、厚みのある四角板状体からなり、側溝１の上部両側に形成された蓋受け用のＬ型の段部２，２に着脱自在に嵌め込まれる。その側溝１に沿う長手方向の一端面３１が、段部２，２の水平面に対して鋭角状に傾斜した傾斜面に形成される一方、前記長手方向の他端面３２における前記長手方向に垂直な面で切った断面の形状が半円弧状に形成される。また、側溝１に沿う長手方向の両側面３３，３３が、前記段部２，２の水平面に対して鋭角状に傾斜した傾斜面に形成され、前記両側面３３，３３と前記段部２，２との間の隙間が上窄まり状に形成される。そして、例えばその一端側に凹状の手掛け部４が形成されている。尚、側溝１は、左右の側壁部１１，１１と、底壁部１２からなり上開放状に形成され、上記段部２，２は側壁部１１，１１の上部に形成されるが、本発明は側溝１の形状を特定するものではなく、上部両側に蓋受け用のＬ型の段部２，２が形成されていればよく、その構成や形状の如何を問わない。 Hereinafter, a groove lid according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1A is a perspective view of the groove lid, FIG. 1B is an explanatory view of the arrangement state of the groove lid, and FIG. 1C is a transverse sectional view of the groove lid. As shown in these drawings, the groove lid 3 is formed of a thick rectangular plate, and is detachably fitted into L-shaped stepped portions 2 and 2 for lid receiving formed on both upper sides of the side groove 1. It is. One end surface 31 in the longitudinal direction along the side groove 1 is formed as an inclined surface inclined at an acute angle with respect to the horizontal surface of the stepped portions 2, 2, while being perpendicular to the longitudinal direction at the other end surface 32 in the longitudinal direction. The cross-sectional shape cut by the surface is formed in a semicircular arc shape. Further, both side surfaces 33, 33 in the longitudinal direction along the side groove 1 are formed as inclined surfaces inclined at an acute angle with respect to the horizontal surface of the step portions 2, 2, and the both side surfaces 33, 33 and the step portions 2, 2 are formed. 2 is formed in a constricted shape. For example, a concave handle portion 4 is formed on one end side thereof. The side groove 1 is composed of left and right side wall portions 11 and 11 and a bottom wall portion 12 and is formed in an open top shape, and the stepped portions 2 and 2 are formed on the upper portions of the side wall portions 11 and 11. Does not specify the shape of the side groove 1, and it is sufficient that L-shaped stepped portions 2, 2 for receiving the lid are formed on both sides of the upper portion, regardless of the configuration or shape.

以上のように構成される溝蓋３では、溝蓋の長手方向の他端面が半円弧状に形成されているので、例えば図２に示すように、一端側を持ち上げた際に、半円弧状の他端面３２が、隣接する溝蓋３の一端面３１に摺接しつつその他端３ａが側溝１の段部２上をほとんど移動しないため、溝蓋３の開放を妨げる摩擦抵抗は少なく、溝蓋３の開放が容易になる。また、例えば図１（ｂ）に示すように、鋭角状の傾斜面に形成される溝蓋３の一端面３１の上部が、隣接する溝蓋３の半円弧状の他端面３２の上部に被さるため、両溝蓋３，３間に土砂が堆積しにくくなり、溝蓋３，３同士が固まるのを防ぐことができ、溝蓋３を開放する際に、溝蓋３を持ち上げやすくなる。そして、溝蓋３の両側面３３，３３と段部２，２との間の隙間が上窄まり状に形成されるので、隙間に土砂が詰まりにくくなり、溝蓋３を開放する際に、溝蓋３を持ち上げやすくなる。   In the groove lid 3 configured as described above, since the other end surface in the longitudinal direction of the groove lid is formed in a semicircular arc shape, for example, as shown in FIG. The other end surface 32 of the adjacent groove lid 3 is in sliding contact with the one end surface 31 of the adjacent groove lid 3, and the other end 3 a hardly moves on the stepped portion 2 of the side groove 1. 3 can be opened easily. For example, as shown in FIG. 1B, the upper portion of one end surface 31 of the groove lid 3 formed on the acutely inclined surface covers the upper portion of the other arc-shaped other end surface 32 of the adjacent groove lid 3. Therefore, it is difficult for sediment to accumulate between the two groove lids 3 and 3, and it is possible to prevent the groove lids 3 and 3 from solidifying, and the groove lid 3 can be easily lifted when the groove lid 3 is opened. And since the clearance gap between the both-sides 33 and 33 of the groove cover 3 and the step parts 2 and 2 is formed in the shape of a constriction, it becomes difficult to clog earth and sand in a clearance gap, and when opening the groove cover 3, It becomes easy to lift the groove lid 3.

図３（ａ）に示す例では、側溝１に沿う長手方向の一端面３１の上半部分３１ａが、段部２，２の水平面に対して鋭角状に傾斜した傾斜面状に形成される一方、前記長手方向の他端面３２における前記長手方向に垂直な面で切った断面の形状が半円弧状に形成される。このような構成によれば、鋭角状の傾斜面に形成される溝蓋３の一端面３１の上部３１ａが、隣接する溝蓋３の半円弧状の他端面３２の上部に被さるため、両溝蓋３，３間に土砂が堆積しにくくなり、溝蓋３，３同士が固まるのを防ぐことができ、溝蓋３を開放する際に、溝蓋３を持ち上げやすくなる。また、溝蓋３の長手方向の他端面３２が半円弧状に形成されているので、一端側を持ち上げた際に、半円弧状の他端面３２の側溝１の段部２に対する摩擦抵抗が少なくなるため、溝蓋３の開放が容易になる。   In the example shown in FIG. 3 (a), the upper half portion 31a of the one end surface 31 in the longitudinal direction along the side groove 1 is formed in an inclined surface shape inclined at an acute angle with respect to the horizontal surface of the step portions 2 and 2. The cross-sectional shape of the other end surface 32 in the longitudinal direction cut by a plane perpendicular to the longitudinal direction is formed in a semicircular arc shape. According to such a configuration, since the upper portion 31a of the one end surface 31 of the groove lid 3 formed on the acute inclined surface covers the upper portion of the other arc-shaped other end surface 32 of the adjacent groove lid 3, both grooves It becomes difficult to deposit earth and sand between the lids 3 and 3, and it is possible to prevent the groove lids 3 and 3 from solidifying, and the groove lid 3 can be easily lifted when the groove lid 3 is opened. Further, since the other end surface 32 in the longitudinal direction of the groove lid 3 is formed in a semicircular arc shape, when the one end side is lifted, the frictional resistance against the step portion 2 of the side groove 1 of the semicircular arc shaped other end surface 32 is small. Therefore, opening of the groove lid 3 is facilitated.

図３（ｂ）に示す例では、側溝１に沿う長手方向の他端面３２の上半部分３２ａが、前記長手方向の一端面３１の傾斜角度と同程度に傾斜した傾斜面に形成され、かつ、他端面３２の下半部分３２ｂが円弧状に形成されている。このような構成によれば、溝蓋３の長手方向の他端面３２の下半部分３２ｂが半円弧状に形成されているので、一端側を持ち上げた際の溝蓋３の回動動作が円滑になり、側溝１の段部２，２に対する抵抗が少なくなるため、溝蓋３の開放が容易になる。また、溝蓋３の長手方向の他端面３２の上半部分３２ａが長手方向の一端面３１の傾斜角度と同程度に傾斜した傾斜面に形成されるので、溝蓋３，３間の隙間が傾斜方向に形成されるため、両溝蓋３，３間に土砂が堆積しにくくなり、溝蓋３，３同士が固まるのを防ぐことができ、溝蓋３を持ち上げやすくなる。   In the example shown in FIG. 3B, the upper half portion 32a of the other end surface 32 in the longitudinal direction along the side groove 1 is formed on an inclined surface inclined to the same degree as the inclination angle of the one end surface 31 in the longitudinal direction, and The lower half portion 32b of the other end surface 32 is formed in an arc shape. According to such a configuration, since the lower half portion 32b of the other end surface 32 in the longitudinal direction of the groove lid 3 is formed in a semicircular arc shape, the rotation operation of the groove lid 3 when the one end side is lifted is smooth. Since the resistance to the stepped portions 2 and 2 of the side groove 1 is reduced, the opening of the groove lid 3 is facilitated. Further, since the upper half portion 32a of the other end surface 32 in the longitudinal direction of the groove lid 3 is formed on an inclined surface that is inclined to the same degree as the inclination angle of the one end surface 31 in the longitudinal direction, a gap between the groove lids 3 and 3 is formed. Since it is formed in an inclined direction, it is difficult for sediment to accumulate between the two groove lids 3, 3, so that the groove lids 3, 3 can be prevented from solidifying and the groove lid 3 can be easily lifted.

図３（ｃ）に示す例では、側溝１に沿う長手方向の他端面３２における前記長手方向に垂直な面で切った断面の形状が１／４円弧状に形成されるので、一端側を持ち上げた際の溝蓋３の回動動作が円滑になり、側溝１の段部２，２に対する抵抗が少なくなるため、溝蓋３の開放が容易になる。   In the example shown in FIG. 3C, the other end surface 32 in the longitudinal direction along the side groove 1 has a cross-sectional shape cut by a plane perpendicular to the longitudinal direction, so that one end side is lifted. The turning operation of the groove lid 3 at the time becomes smooth and the resistance to the step portions 2 and 2 of the side groove 1 is reduced, so that the opening of the groove lid 3 is facilitated.

図３（ｄ）に示す例では、側溝１に沿う長手方向の一端面３１と他端面３２における前記長手方向に垂直な面で切った断面の形状が１／４円弧状に形成されるので、一端側（又は他端側）を持ち上げた際の溝蓋３の回動動作が円滑になり、側溝１の段部２，２に対する抵抗が少なくなるため、溝蓋３の開放が容易になる。また、凹状の手掛け部４を一端側と他端側の両方に形成すれば、一端側又は他端側のどちらを持ち上げてもよく利便性が向上し、かつ、溝蓋３の製作も容易となる。   In the example shown in FIG. 3 (d), the shape of the cross section cut by the surface perpendicular to the longitudinal direction at the one end surface 31 and the other end surface 32 in the longitudinal direction along the side groove 1 is formed in a 1/4 arc shape. When the one end side (or the other end side) is lifted, the groove lid 3 can be smoothly rotated, and the resistance to the stepped portions 2 and 2 of the side groove 1 is reduced. Therefore, the groove lid 3 can be easily opened. Further, if the concave handle portion 4 is formed on both the one end side and the other end side, it is possible to lift either one end side or the other end side, and the convenience is improved, and the groove lid 3 can be easily manufactured. Become.

（ａ）は本発明の実施の形態に係る溝蓋の斜視図、（ｂ）は溝蓋の配列状態の説明図、（ｃ）は溝蓋の横断面図である。(A) is a perspective view of the groove cover according to the embodiment of the present invention, (b) is an explanatory view of the arrangement state of the groove cover, (c) is a cross-sectional view of the groove cover. 同溝蓋の開放動作の説明図である。It is explanatory drawing of the opening operation | movement of the groove cover. （ａ）〜（ｄ）は同その他の溝蓋の例を示す説明図である。(A)-(d) is explanatory drawing which shows the example of the other groove cover. （ａ）は従来の溝蓋の説明図、（ｂ）は溝蓋の開放動作の説明図である。(A) is explanatory drawing of the conventional groove cover, (b) is explanatory drawing of opening operation | movement of a groove cover.

符号の説明Explanation of symbols

１…側溝、２…段部、３…溝蓋、３１…一端面、３１ａ…上半部分、３１ｂ…下半部分、３２…他端面、３２ａ…上半部分、３２ｂ…下半部分、３ａ…他端、３３…側部   DESCRIPTION OF SYMBOLS 1 ... Side groove, 2 ... Step part, 3 ... Groove cover, 31 ... One end surface, 31a ... Upper half part, 31b ... Lower half part, 32 ... Other end surface, 32a ... Upper half part, 32b ... Lower half part, 3a ... The other end, 33 ... side

Claims (4)

側溝の上部両側に形成された蓋受け用の段部に着脱自在に嵌め込まれる溝蓋であって、
厚みのある四角板状体からなり、前記側溝に沿う長手方向の一端面が、前記段部の水平面に対して鋭角状に傾斜した傾斜面に形成される一方、前記長手方向の他端面が半円弧状に形成されることを特徴とする溝蓋。 A groove lid that is detachably fitted into a lid receiving step formed on both sides of the upper side of the side groove,
The one end surface in the longitudinal direction along the side groove is formed as an inclined surface inclined at an acute angle with respect to the horizontal surface of the step portion, and the other end surface in the longitudinal direction is formed of a thick square plate-like body. A groove lid characterized by being formed in a semicircular arc shape. 側溝の上部両側に形成された蓋受け用の段部に着脱自在に嵌め込まれる溝蓋であって、
厚みのある四角板状体からなり、前記側溝に沿う長手方向の一端面の少なくとも上半部分が、前記段部の水平面に対して鋭角状に傾斜した傾斜面に形成される一方、前記長手方向の他端面が半円弧状に形成されることを特徴とする溝蓋。 A groove lid that is detachably fitted into a lid receiving step formed on both sides of the upper side of the side groove,
It consists of a thick square plate-like body, and at least the upper half portion of one end surface in the longitudinal direction along the side groove is formed on an inclined surface inclined at an acute angle with respect to the horizontal surface of the step portion, while the longitudinal direction A groove lid, wherein the other end surface of the groove is formed in a semicircular arc shape. 側溝の上部両側に形成された蓋受け用の段部に着脱自在に嵌め込まれる溝蓋であって、
厚みのある四角板状体からなり、前記側溝に沿う長手方向の一端面の少なくとも上半部分が、前記段部の水平面に対して鋭角状に傾斜した傾斜面に形成される一方、前記長手方向の他端面の上半部分が、前記長手方向の一端面の傾斜角度と同程度に傾斜した傾斜面に形成され、前記他端面の下半部分が円弧状に形成されることを特徴とする溝蓋。 A groove lid that is detachably fitted into a lid receiving step formed on both sides of the upper side of the side groove,
It consists of a thick square plate-like body, and at least the upper half portion of one end surface in the longitudinal direction along the side groove is formed on an inclined surface inclined at an acute angle with respect to the horizontal surface of the step portion, while the longitudinal direction The groove is characterized in that an upper half portion of the other end surface is formed into an inclined surface inclined to the same degree as an inclination angle of the one end surface in the longitudinal direction, and a lower half portion of the other end surface is formed in an arc shape. lid. 前記側溝に沿う長手方向の両側面が、前記段部の水平面に対して鋭角状に傾斜した傾斜面に形成され、前記両側面と前記段部との間の隙間が上窄まり状に形成されることを特徴とする請求項１乃至３の何れか一項に記載の溝蓋。 Both side surfaces in the longitudinal direction along the side grooves are formed as inclined surfaces inclined at an acute angle with respect to the horizontal surface of the step portion, and a gap between the both side surfaces and the step portion is formed in a narrowed shape. The groove lid according to any one of claims 1 to 3 , wherein
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