JP6695591B2 - Wrench tool - Google Patents

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JP6695591B2
JP6695591B2 JP2016160886A JP2016160886A JP6695591B2 JP 6695591 B2 JP6695591 B2 JP 6695591B2 JP 2016160886 A JP2016160886 A JP 2016160886A JP 2016160886 A JP2016160886 A JP 2016160886A JP 6695591 B2 JP6695591 B2 JP 6695591B2
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wrench
square
engaging
bolt
grating lid
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JP2018027602A (en
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健治 近藤
健治 近藤
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カネソウ株式会社
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本発明は、溝路に設けられた蓋受枠とグレーチング蓋とからなる溝路用通水被覆装置の施工作業または保全作業に用いられるレンチ工具に関する。   BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrench tool used for construction work or maintenance work of a water passage covering device for a groove, which includes a lid receiving frame provided in the groove and a grating lid.

排水溝等の溝路の上部開口を覆う溝蓋として、所定間隔で並列した複数のメインバーと該メインバーに直交状に差し渡された適数のクロスバーとを備えてなるグレーチング蓋が知られている。グレーチング蓋は、近年、隣合うメインバーの間隔が5〜12mm程度の細目タイプのものが使用される場合が増加している。この細目タイプのものは、メインバーの間隔が狭くなることで、各メインバー間の隙間に車椅子のタイヤや杖の先端が嵌り込んでしまうことを、防止できるという利点がある。   As a groove cover for covering the upper opening of a ditch such as a drainage ditch, there is known a grating cover including a plurality of main bars arranged in parallel at a predetermined interval and an appropriate number of crossbars orthogonally arranged on the main bars. Has been. In recent years, as the grating lid, a fine type in which an interval between adjacent main bars is approximately 5 to 12 mm is increasingly used. This fine type has an advantage that it is possible to prevent the wheelchair tire or the tip of a cane from being fitted into the gap between the main bars due to the narrowed interval between the main bars.

上記のグレーチング蓋は、溝路の上部に配設された蓋受枠に乗載されて、該蓋受枠に着脱可能に固定される。この固定には、一般的に、四角穴付きボルトや六角穴付きボルトが使用され、所望の締付強度を発揮できるように、該ボルトの径サイズ(ねじの呼び径)が定められる。ところが、上記した細目タイプのグレーチング蓋を使用する場合には、前記締付強度を有するボルトを使用すると、該ボルトの頭部外径よりも、メインバーの間隔が短くなることから、該ボルトをメインバーの隙間内に設けることができない。そのため、例えば、グレーチング蓋が、メインバーの下方に配設された板状の連結部を備えると共に、蓋受枠が、該グレーチング蓋の連結部と対応する位置に、前記ボルトと螺合される連結部を備えてなり、これら連結部を該ボルトを介して螺合することで、該グレーチング蓋を蓋受枠に固定する構成がある。ここで、グレーチング蓋と蓋受枠とを固定する作業や該固定の解除作業には、通常、前記四角穴付きボルトや六角穴付きボルトを螺回操作できるL形やT形のレンチ工具が使用される(例えば、特許文献1参照)。   The grating lid is mounted on a lid receiving frame arranged above the groove and is detachably fixed to the lid receiving frame. Generally, a bolt with a square hole or a bolt with a hexagonal hole is used for this fixing, and the diameter size (nominal diameter of the screw) of the bolt is determined so that desired tightening strength can be exhibited. However, when using the above-mentioned fine type grating lid, if a bolt having the above-mentioned tightening strength is used, the interval between the main bars becomes shorter than the outer diameter of the head of the bolt. It cannot be installed in the gap of the main bar. Therefore, for example, the grating lid is provided with a plate-like connecting portion disposed below the main bar, and the lid receiving frame is screwed to the bolt at a position corresponding to the connecting portion of the grating lid. There is a configuration in which the grating lid is fixed to the lid receiving frame by screwing these connecting portions together via the bolts. Here, an L-shaped or T-shaped wrench tool capable of screwing the square socket bolt or the hexagon socket bolt is usually used for the operation of fixing the grating lid and the lid receiving frame and the operation of releasing the fixation. (See, for example, Patent Document 1).

レンチ工具は、一般的に、四角柱状または六角柱状のレンチ軸部と、該レンチ軸部の基端部に略直交状に設けられたハンドル部とを備えてなる。こうしたレンチ工具を、上述したグレーチング蓋と蓋受枠とを固定するボルトの螺合作業や解除作業に用いる場合には、グレーチング蓋を蓋受枠に乗載した状態で、該グレーチング蓋のメインバー間に上方から前記レンチ工具のレンチ軸部を挿通させて、該レンチ軸部の先端部を前記ボルトの四角穴または六角穴に嵌入させる。そして、メインバーの上方で、レンチ工具のハンドル部を回転させることにより、レンチ軸部を回動させて、前記ボルトを螺合または螺合解除できる。   The wrench tool generally includes a wrench shaft portion having a quadrangular prism shape or a hexagonal prism shape, and a handle portion provided at a base end portion of the wrench shaft portion in a substantially orthogonal shape. When such a wrench tool is used for the screwing operation or the releasing operation of the bolt for fixing the above-mentioned grating lid and the lid receiving frame, the grating lid is mounted on the lid receiving frame, and between the main bars of the grating lid. The wrench shaft portion of the wrench tool is inserted from above, and the tip end portion of the wrench shaft portion is fitted into the square hole or the hexagonal hole of the bolt. Then, by rotating the handle portion of the wrench tool above the main bar, the wrench shaft portion can be rotated to screw or unscrew the bolt.

実開昭60−100157号公報Japanese Utility Model Publication No. 60-100157

上述した一般的なレンチ工具は、四角柱状または六角柱状のレンチ軸部を備えたものでることから、該レンチ軸部を、グレーチング蓋の隣合うメインバー間の隙間に挿通した状態で回動させるためには、該レンチ軸部の対角間の間隔が該メインバー間の間隔よりも短くなければならない。しかし、上記細目タイプのグレーチング蓋では、所望の締付強度を有する四角穴付きボルトや六角穴付きボルトを使用すると、該ボルトの対角間の間隔がメインバーの間隔よりも長い場合があり、この場合には、レンチ工具のレンチ軸部を該メインバーの隙間から挿通して、該メインバーの下方に配した四角穴付きボルトや六角穴付きボルトを螺回操作することができない。そのため、例えば、前記締付強度の四角穴付きボルトや六角穴付きボルトに使用するレンチ工具に応じて、グレーチング蓋の隣合うメインバーの間隔が設定されていた。ところが、こうしてメインバーの間隔が定められると、該メインバーの間隔がレンチ軸部の対角間の間隔よりも狭いグレーチング蓋を使用できないことから、使用できるグレーチング蓋に制限が生じていた。特に、隣合うメインバーの間隔が6mm以下という極細目タイプのグレーチング蓋は、前記締付強度の四角穴付きボルトや六角穴付きボルトに適したレンチ工具を使用できないことから、該極細目タイプのグレーチング蓋が求められる場合であっても、これよりもメインバーの間隔の広いグレーチング蓋を使用しなければならないという問題があった。   Since the general wrench tool described above is provided with a quadrangular prism shape or a hexagonal prism wrench shaft portion, the wrench shaft portion is rotated while being inserted into the gap between the adjacent main bars of the grating lid. In order to achieve this, the distance between the diagonals of the wrench shaft portion must be shorter than the distance between the main bars. However, in the above-mentioned fine type grating lid, when a square hole bolt or a hexagon hole bolt having a desired tightening strength is used, the interval between the diagonals of the bolt may be longer than the interval of the main bar. In this case, the wrench shaft portion of the wrench tool cannot be inserted through the gap of the main bar, and the square hole bolt and the hexagon hole bolt arranged below the main bar cannot be screwed. Therefore, for example, the interval between the main bars adjacent to the grating lid is set depending on the wrench tool used for the bolt with a square hole or the bolt with a hexagonal hole having the tightening strength. However, when the spacing between the main bars is determined in this manner, it is not possible to use a grating lid having a spacing between the main bars that is narrower than the spacing between the diagonal corners of the wrench shafts, which limits the grating lid that can be used. In particular, an extremely fine type grating lid in which the interval between adjacent main bars is 6 mm or less cannot be used with a wrench tool suitable for the square hole bolts and the hexagon hole bolts having the tightening strength. Even when a grating lid is required, there is a problem in that a grating lid having a wider main bar interval than this must be used.

一方、上述したようにレンチ軸部の対角間の間隔よりもメインバーの間隔が狭い構成のグレーチング蓋では、四角穴付きボルトや六角穴付きボルトの直上に位置するメインバーの一部を切り取った構成とすることで、該レンチ軸部を備えたレンチ工具を使用可能である。しかし、この構成では、メインバーの一部を切り取った部位の強度低下や剛性低下が懸念されると共に、当該部位に車椅子のタイヤや杖の先端が嵌り込んでしまう虞もある。   On the other hand, as described above, in the grating lid having a structure in which the interval between the main bars is narrower than the interval between the diagonal corners of the wrench shaft portion, a part of the main bar located directly above the square hole bolts and the hexagon hole bolts is cut off. With the configuration, a wrench tool including the wrench shaft portion can be used. However, with this configuration, there is a concern that the strength and rigidity of the portion where the main bar is cut off may be reduced, and the tire of the wheelchair and the tip of the cane may be fitted into the portion.

こうしたことから、隣合うメインバーの間隔がレンチ軸部の対角の間隔よりも狭いグレーチング蓋にあっても、該メインバーの一部を切り取る構造とすること無く、該メインバーの下方に配した四角穴付きボルトまたは六角穴付きボルトを螺回操作できるレンチ工具が求められていた。本発明は、かかるレンチ工具を提案するものである。   For this reason, even in a grating lid in which the distance between adjacent main bars is narrower than the diagonal distance between the wrench shafts, the main bars are arranged below the main bar without the structure of cutting out a part of the main bars. There has been a demand for a wrench tool capable of screwing a square holed bolt or a hexagonal holed bolt. The present invention proposes such a wrench tool.

本発明は、溝路の上部に配設された蓋受枠に、所定間隔で並列した複数のメインバーを備えたグレーチング蓋が固定されてなる溝路用通水被覆装置の、施工作業または保全作業に用いられるものであって、該メインバーの下方で上下に並ぶ一対の連結部を連結させる、四角形状または六角形状の多角形穴を有する多角形穴付きボルトを、螺回操作するためのレンチ工具において、長尺杆状のレンチ軸部と、該レンチ軸部の基端部に連結された操作部とから構成されてなるものであって、前記レンチ軸部は、前記多角形穴付きボルトの多角形穴に係脱可能に嵌入される、該多角形穴と同じ多角形の角柱状の係合角形部と、該係合角形部の後端に連成され、該係合角形部の対面間の間隔以下の外径からなり且つ前記メインバーの上下方向幅よりも長い円柱状の挿通杆部とを備え、前記挿通杆部の外径と係合角形部の対面間の間隔とが、前記グレーチング蓋の隣合うメインバーの間隔よりも短く、かつ、該係合角形部の対角間の間隔が、隣合うメインバーの間隔よりも長いことを特徴とするレンチ工具である。   The present invention is a construction work or a maintenance work of a water passage coating device for a ditch, in which a grating lid provided with a plurality of main bars arranged in parallel at a predetermined interval is fixed to a lid receiving frame arranged in the upper part of the ditch. A wrench for screwing a polygonal holed bolt having a square or hexagonal polygonal hole that connects a pair of vertically arranged connecting parts below the main bar. The tool comprises a long rod-shaped wrench shaft portion and an operating portion connected to a base end portion of the wrench shaft portion, wherein the wrench shaft portion is the bolt with the polygonal hole. Of the polygonal prism, which is removably fitted in the polygonal hole of the polygonal hole, and an engagement square portion of the same polygonal prism shape as the polygonal hole, and a rear end of the engagement square portion. A cylindrical insertion rod portion having an outer diameter equal to or less than the distance between the facing surfaces and longer than the vertical width of the main bar, and an outer diameter of the insertion rod portion and a distance between the facing surfaces of the engaging square portions. The wrench tool is characterized in that the interval between the main bars adjacent to each other of the grating lid is shorter, and the interval between the diagonals of the engaging rectangular portions is longer than the interval between the adjacent main bars.

ここで、レンチ工具は、四角穴付きボルトを螺回操作するためのものである場合、レンチ軸部の係合角形部が四角柱状であり、一方、六角穴付きボルトを螺回操作するためのものである場合、該係合角形部が六角柱状である。また、係合角形部は、全ての対面間の間隔が、隣合うメインバーの間隔よりも短く、かつ全ての対角間の間隔が、隣合うメインバーの間隔よりも長い。そして、挿通杆部の外径は、係合角形部の全ての対面間の間隔以下である。   Here, when the wrench tool is for screwing a square hole bolt, the engaging square portion of the wrench shaft portion is a square column shape, while the wrench tool is for screwing a hexagon socket bolt. In the case of one, the engaging square portion is a hexagonal column shape. Further, in the engaging prismatic portion, the intervals between all the facing surfaces are shorter than the intervals between the adjacent main bars, and the intervals between all the diagonal corners are longer than the interval between the adjacent main bars. The outer diameter of the insertion rod is equal to or less than the distance between all the facing surfaces of the engaging rectangular portion.

かかる構成によれば、グレーチング蓋のメインバー間で回動不能な係合角形部が係合される多角形穴付きボルトであっても、該メインバー間に挿通杆部を挿通した状態とすることで、螺回操作することができる。すなわち、本発明のレンチ工具は、レンチ軸部の係合角形部を、そのいずれか一対の対面とメインバーの長手方向とを略平行な状態とすることで、グレーチング蓋の上方から該メインバー間の隙間に挿通できる。そして、係合角形部の全体をメインバーの下方に突出させて、レンチ軸部の挿通杆部を該メインバー間に挿通した状態で、該係合角形部を、該メインバーの下方に配した多角形穴付きボルトの多角形穴に嵌入する。この状態で、レンチ軸部は、挿通杆部がメインバー間に挿通され、且つ係合角形部が多角形穴付きボルトに係合されていることから、操作部を介して回動されることにより、該多角形穴付きボルトを螺回させることができる。このように本発明のレンチ工具によれば、対角の間隔がメインバーの間隔よりも長く且つ対面の間隔が該メインバーの間隔よりも短い係合角形部に係合される多角形穴付きボルトを、該メインバーの下方に配して、その螺合と螺合解除とを行い得る。換言すると、上述したメインバーの間隔が係合角形部の対角の間隔よりも短いグレーチング蓋を用いた場合であっても、本発明のレンチ工具を使用することで、所望の締付強度を有する多角形穴付きボルトを螺回操作することができる。さらに、上述したメインバーの間隔が6mm以下の極細目タイプのグレーチング蓋であっても、所望の締付強度の多角形穴付きボルトを本発明のレンチ工具により螺回操作することで、蓋受枠に適正かつ容易に固定でき且つ該固定解除できる。これにより、クライアントから求められている極細目タイプのグレーチング蓋を備えた溝路用通水被覆装置を、提供することもできる。   According to this structure, even with the polygonal holed bolt in which the non-rotatable engagement square portion is engaged between the main bars of the grating lid, the insertion rod is inserted between the main bars. By doing so, the screw can be operated. That is, the wrench tool of the present invention is configured such that any one of a pair of facing surfaces of the wrench shaft portion is substantially parallel to the longitudinal direction of the main bar, so that the main bar is pressed from above the grating lid. Can be inserted in the gap between them. Then, the entire engaging square portion is projected below the main bar, and the engaging square portion is arranged below the main bar in a state where the insertion rod portion of the wrench shaft portion is inserted between the main bars. Insert into the polygonal hole of the bolt with the polygonal hole. In this state, the wrench shaft portion is rotated through the operation portion because the insertion rod portion is inserted between the main bars and the engagement square portion is engaged with the polygonal holed bolt. Thus, the polygonal holed bolt can be screwed. As described above, according to the wrench tool of the present invention, with the polygonal hole that is engaged with the engagement square portion whose diagonal distance is longer than that of the main bar and whose facing distance is shorter than that of the main bar. A bolt may be placed below the main bar to engage and disengage the bolt. In other words, even when using the grating lid in which the interval between the main bars is shorter than the diagonal interval between the engaging rectangular portions, the desired tightening strength can be obtained by using the wrench tool of the present invention. It is possible to screw the bolt having the polygonal hole. Further, even in the case of the extra fine type grating lid with the interval between the main bars being 6 mm or less, the lid receiving frame can be obtained by screwing the polygonal holed bolt having a desired tightening strength with the wrench tool of the present invention. Can be properly and easily fixed to and released from. Accordingly, it is possible to provide a water passage covering device for a groove provided with an extremely fine type grating lid required by a client.

また、本発明のレンチ工具によれば、上述したように、グレーチング蓋のメインバー間を挿通させて多角形穴付きボルトの螺回操作を行えることから、従来のようにメインバーの一部分を切り取った構造のグレーチング蓋を使用する必要が無い。そのため、メインバーの一部分を切り取る構造により生ずる、該グレーチング蓋の強度低下や剛性低下という問題と、切り取った部分で杖の先端や車椅子のタイヤが嵌まり込むという問題とを、解決できる。   Further, according to the wrench tool of the present invention, as described above, since the main bar of the grating lid can be inserted to perform the screwing operation of the bolt with a polygonal hole, a part of the main bar is cut off as in the conventional case. It is not necessary to use a grating lid with a different structure. Therefore, it is possible to solve the problem of the strength and rigidity of the grating lid being reduced due to the structure of cutting out a part of the main bar, and the problem that the tip of the cane and the tire of the wheelchair are fitted in the cut out part.

上述した本発明のレンチ工具にあって、レンチ軸部は、挿通杆部の後端に連成された、係合角形部と同じ角柱形状の角形残存部を備えている構成が提案される。ここで、同じ角柱形状とは、断面形状が同じ多角形であることを示す。すなわち、角形残存部は、係合角形部と同じ断面多角形の角柱状である。   In the above-described wrench tool of the present invention, a configuration is proposed in which the wrench shaft portion is provided with a prismatic rectangular remaining portion that is connected to the rear end of the insertion rod portion and has the same prismatic shape as the engaging rectangular portion. Here, the same prismatic shape means that the cross-sectional shapes are polygonal shapes. That is, the remaining polygonal portion is a prism having the same polygonal cross section as the engaging prismatic portion.

かかる構成にあっては、挿通杆部の前後に同じ角柱形状の係合角形部と角形残存部とを備えたものであるから、角柱材を切削加工して挿通杆部を成形することにより、係合角形部と挿通杆部と角形残存部とを有するレンチ軸部を容易に成形できる。また、このように一本の角柱材から形成されるレンチ軸部は、係合角形部と挿通杆部と角形残存部とを同心状に正確に成形し易いことから、比較的長尺であっても、部分的に偏心して回動することが無く、螺回操作を容易かつ安定して行うことができる。   In such a configuration, since it is provided with the same prismatic engaging square portion and square residual portion before and after the insertion rod portion, by cutting the prismatic material to form the insertion rod portion, The wrench shaft portion having the engaging square portion, the insertion rod portion, and the square remaining portion can be easily molded. In addition, the wrench shaft portion thus formed from a single prismatic material is relatively long because it is easy to accurately and accurately form the engaging square portion, the insertion rod portion, and the square remaining portion in a concentric manner. However, it is possible to perform the screwing operation easily and stably without rotating partially eccentrically.

上述した本発明のレンチ工具にあって、レンチ軸部の係合角形部は、特定の一対の対面間の間隔が他の対面間の間隔よりも短いものである構成が提案される。ここで、特定の一対の対面間の間隔は、挿通杆部の外径以上であることから、該挿通杆部の外径は、当該特定の一対の対面間の間隔以下で且つ他の対面間の間隔よりも短くなっている。   In the above-described wrench tool of the present invention, it is proposed that the engagement square portion of the wrench shaft portion has a specific gap between the facing surfaces that is shorter than the spacing between the other facing surfaces. Here, since the spacing between the specific pair of facing surfaces is equal to or larger than the outer diameter of the insertion rod, the outer diameter of the insertion rod is equal to or less than the spacing between the specific pair of facing surfaces and between the other facing surfaces. It is shorter than the interval.

かかる構成にあっては、他の対面間の間隔よりも短い間隔の特定の一対の対面を、メインバーの長手方向と略平行な状態として、当該係合角形部を該メインバー間の隙間に挿通させることにより、該係合角形部を一層スムーズに該メインバーの隙間に抜き差しできる。そのため、本構成によれば、メインバーの下方に配した多角形穴付きボルトを螺回操作する作業を、一層容易に実施できる。   In such a configuration, a specific pair of facing surfaces having a spacing shorter than the spacing between the other facing surfaces is set in a state of being substantially parallel to the longitudinal direction of the main bar, and the engaging square portion is provided in the gap between the main bars. By inserting it, the engaging square portion can be more smoothly inserted into and removed from the gap of the main bar. Therefore, according to this configuration, the operation of screwing the bolt with the polygonal hole arranged below the main bar can be more easily performed.

本発明のレンチ工具によれば、上述したように、メインバーの間隔が係合角形部の対角の間隔よりも短いグレーチング蓋であっても、メインバーの下方に配した、所望の締付強度を有する多角形穴付きボルトを、容易に螺回操作することができる。これにより、従来よりもメインバーの間隔が狭いグレーチング蓋を使用可能となることから、クライアントから要求される極細目タイプのグレーチング蓋を備えた溝路用通水被覆装置を提供することができる。   According to the wrench tool of the present invention, as described above, even if the grating lid has a main bar interval shorter than a diagonal interval of the engaging square portions, a desired tightening force is provided below the main bar. A bolt having a strong polygonal hole can be easily screwed. As a result, since it becomes possible to use a grating lid having a main bar that is narrower than the conventional one, it is possible to provide a water passage covering device for a groove provided with an extremely fine type grating lid required by a client.

溝路用通水被覆装置11の施工状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the construction state of the water flow coating device for ditches 11. 溝路用通水被覆装置11の平面図である。FIG. 3 is a plan view of the channel water-permeable coating device 11. 六角穴付きボルト41によるグレーチング蓋13の固定状態を示す部分拡大断面図である。It is a partial expanded sectional view which shows the fixing state of the grating lid 13 by the hexagon socket bolt 41. 本実施例1のレンチ工具51を示す正面図である。It is a front view which shows the wrench tool 51 of this Example 1. レンチ工具51の、(A)底面図と、(B)図4中のX−X線断面図である。It is the bottom view of (A) of the wrench tool 51, and (B) XX sectional view taken on the line in FIG. レンチ工具51の使用態様を示す説明図である。It is explanatory drawing which shows the usage mode of the wrench tool 51. 図6から続く、レンチ工具51の使用態様を示す説明図である。It is explanatory drawing which shows the usage mode of the wrench tool 51 following FIG. 図7から続く、レンチ工具51の使用態様を示す説明図である。It is explanatory drawing which shows the usage mode of the wrench tool 51 following FIG. レンチ工具51の係合角形部55をグレーチング蓋13のメインバー31間に挿通する状態を示す斜視図である。FIG. 6 is a perspective view showing a state in which the engagement square portion 55 of the wrench tool 51 is inserted between the main bars 31 of the grating lid 13. レンチ工具51による六角穴付きボルト41の螺回操作を示す斜視図である。FIG. 8 is a perspective view showing a screwing operation of the hexagon socket head cap screw 41 by the wrench tool 51. 本実施例2のレンチ工具71のレンチ軸部72の、(A)部分拡大正面図と、(B)部分拡大側面図である。It is a (A) partial expanded front view and a (B) partial expanded side view of the wrench shaft part 72 of the wrench tool 71 of this Example 2. 図11中のY−Y線断面図である。It is the YY sectional view taken on the line in FIG. レンチ工具71の使用態様を示す説明図である。It is explanatory drawing which shows the usage condition of the wrench tool 71.

本発明にかかる実施例を添付図面に従って説明する。先ず、本発明にかかるレンチ工具51,71を用いる対象である溝路用通水被覆装置11について、説明する。   Embodiments according to the present invention will be described with reference to the accompanying drawings. First, the channel water-passage coating device 11 to which the wrench tools 51, 71 according to the present invention are applied will be described.

溝路1は、断面略U字形に形成されたU字溝からなる複数の溝路部材2を、地盤の所定深さ位置に一列状に埋設して構築される。そして、図1,2に示すように、溝路1には、その上部開口を通水可能に覆う溝路用通水被覆装置11が配設される。   The ditch 1 is constructed by embedding a plurality of ditch members 2 each having a U-shaped groove formed in a substantially U-shaped cross section in a row at a predetermined depth position of the ground. Then, as shown in FIGS. 1 and 2, a water passage covering device 11 for a groove is provided in the groove 1 so as to cover the upper opening thereof so that water can pass therethrough.

上記の溝路用通水被覆装置11は、溝路1を構成する左右の側壁4a,4bに固定された蓋受枠12と、該蓋受枠12に乗載されたグレーチング蓋13とを備えてなる。蓋受枠12は、左右の支持枠15a,15bと、両支持枠15a,15bを連結する複数の連結梁16とを備え、一方の支持枠15aが、側壁4aに乗載される水平片部21aと、該水平片部21aの外側端から垂直状に起立する垂直片部22aとから構成されており、該水平片部21aは、側壁4aの上面幅と略同じ幅となっている。また、他方の支持枠15bは、外側端部が側壁4bに乗載される幅広の水平片部21bと、該水平片部21bの内側端から垂直状に起立する垂直片部22bとから構成されており、該垂直片部22bが溝路1の上部に配置される。この他方の支持枠15bは、その垂直片部22bが、前記一方の支持枠15aの垂直片部22aと所定間隔をおいて対向配置され、溝路1の一方の側壁4a寄りに位置する。こうして配置された両垂直片部22a,22bの間に通水部9が形成され、該通水部9を除く溝路1の上部開口が、他方の支持枠15bの水平片部21bにより遮蔽されている。   The above water passage covering device 11 for a ditch includes a lid receiving frame 12 fixed to the left and right side walls 4a and 4b forming the ditch 1, and a grating lid 13 mounted on the lid receiving frame 12. .. The lid receiving frame 12 includes left and right supporting frames 15a and 15b and a plurality of connecting beams 16 that connect the supporting frames 15a and 15b, and one supporting frame 15a is mounted on the side wall 4a. And a vertical piece 22a that stands vertically from the outer end of the horizontal piece 21a. The horizontal piece 21a has a width substantially the same as the upper surface width of the side wall 4a. The other support frame 15b is composed of a wide horizontal piece 21b whose outer end is mounted on the side wall 4b, and a vertical piece 22b which stands vertically from the inner end of the horizontal piece 21b. The vertical piece 22b is arranged above the groove 1. The vertical piece 22b of the other support frame 15b is arranged to face the vertical piece 22a of the one support frame 15a at a predetermined interval, and is located near one side wall 4a of the groove 1. The water passage portion 9 is formed between the two vertical piece portions 22a and 22b thus arranged, and the upper opening of the groove 1 except for the water passage portion 9 is shielded by the horizontal piece portion 21b of the other support frame 15b. ing.

こうした両支持枠15a,15bは、鉄鋼又はステンレス鋼からなる板状の金属材を素材として形成されており、その長さは、一列状をなす複数の溝路部材2の長手方向に相当する所定の長さとなっている。尚、支持枠15a,15bは、水平片部21a,21bと垂直片部22a,22bとを、一枚の金属板を断面L形に折り曲げ加工させて形成されたものでもよいし、二枚の金属板を溶接によって断面L形となるように接合されたものであってもよい。   Both of the support frames 15a and 15b are formed by using a plate-shaped metal material made of steel or stainless steel as a raw material, and the length thereof is a predetermined length corresponding to the longitudinal direction of the plurality of groove member 2 forming one row. Has become the length of. The support frames 15a and 15b may be formed by bending the horizontal piece portions 21a and 21b and the vertical piece portions 22a and 22b into a single metal plate having an L-shaped cross section, or two pieces. A metal plate may be joined by welding so as to have an L-shaped cross section.

左右の支持枠15a,15bは、該支持枠15a,15bの長手方向に所定間隔で配設された複数の連結梁16によって連結される。各連結梁16は、強度に優れた金属製の角パイプからなり、溝路1を構成する左右の側壁4a,4bの外側面5,5間の幅よりも若干長い所定長で形成されている。各連結梁16は、支持枠15a,15bの水平片部21a,21bの上面に当接して配設され、両支持枠15a,15bの垂直片部22a,22bに夫々開口形成された貫通孔(図示せず)を貫通した状態で、該水平片部21a,21bの上面または水平片部21a,21bと該貫通孔の孔縁とに溶接によって接合されている。尚、こうして左右の支持枠15a,15bを移動不能に連結した各連結梁16は、その左右両端部が、溝路1の側壁4a,4b上に、各支持枠15a,15bの水平片部21a,21bを介して乗載されている。   The left and right support frames 15a and 15b are connected by a plurality of connecting beams 16 arranged at predetermined intervals in the longitudinal direction of the support frames 15a and 15b. Each connecting beam 16 is made of a metal square pipe having excellent strength, and is formed with a predetermined length slightly longer than the width between the outer side surfaces 5 and 5 of the left and right side walls 4 a and 4 b forming the groove 1. .. Each connecting beam 16 is disposed in contact with the upper surfaces of the horizontal piece portions 21a and 21b of the support frames 15a and 15b, and through holes formed in the vertical piece portions 22a and 22b of both the support frames 15a and 15b, respectively. In a state of penetrating (not shown), the upper surface of the horizontal piece 21a, 21b or the horizontal piece 21a, 21b and the hole edge of the through hole are joined by welding. The left and right ends of each connecting beam 16 in which the left and right support frames 15a and 15b are immovably connected to each other are located on the side walls 4a and 4b of the groove 1 on the horizontal piece 21a of each of the support frames 15a and 15b. , 21b.

各連結梁16の両端部には、溶接により接合された固定杆17,17が、溝路1の側壁4a,4bの外側面5,5よりも若干外方で、該外側面5,5に沿って夫々下方に垂設されている。各固定杆17,17には、先端が溝路1の側壁4a,4bの外側面5,5に圧接可能な固定螺子18,18が夫々外側方から螺合されている。そして、これら固定螺子18,18を締付方向に螺回操作して、各固定螺子18,18の先端部を側壁4a,4bの外側面5,5に圧接させることにより、その緊締作用を介して、左右の支持枠15a,15bおよび連結梁16を溝路1の側壁4a,4bに固定する。   At both ends of each connecting beam 16, fixed rods 17, 17 joined by welding are provided on the outer side surfaces 5, 5 slightly outside the outer side surfaces 5, 5 of the side walls 4a, 4b of the groove passage 1. Along each of them is hung downward. Fixing screws 18, 18 whose tips are press-contacted to the outer side surfaces 5, 5 of the side walls 4a, 4b of the groove 1 are respectively screwed into the respective fixing rods 17, 17 from the outside. Then, these fixing screws 18, 18 are screwed in the tightening direction to bring the tip end portions of the fixing screws 18, 18 into pressure contact with the outer side surfaces 5, 5 of the side walls 4a, 4b. Then, the left and right support frames 15a and 15b and the connecting beam 16 are fixed to the side walls 4a and 4b of the groove 1.

また、左右の支持枠15a,15bには、夫々の垂直片部22a,22b間に、長手方向に所定間隔をおいて複数の乗載梁26が配設されている。各乗載梁26は、金属製の角パイプからなり、両端部が、各垂直片部22a,22bに夫々開口形成された取付孔(図示せず)に嵌入された状態で、該取付孔の孔縁に溶接を介して接合されている。乗載梁26は、上記したグレーチング蓋13が乗載されるものであり、該グレーチング蓋13を乗載した状態で、該グレーチング蓋13の上面が支持枠15a,15bの垂直片部22a,22bの上端と略同じ高さ位置となるように、上下方向配設位置を定めて該垂直片部22a,22bに配設されている。さらに、こうした乗載梁26は、複数個で一個のグレーチング蓋13を支えるように、該グレーチング蓋13の長さよりも短い所定間隔で長手方向に配設されている。そして、乗載されたグレーチング蓋13の両端寄りに位置する二個の乗載梁26には、略水平方向に沿った連結板片27が溶接を介して、該乗載梁26の下面に接合されている。ここで、本実施例にあっては、二個の乗載梁26に配設された連結板片27が、夫々にグレーチング蓋の両端方へ向けて各乗載梁26から突出するように設けられている。そして、連結板片27には、乗載梁26から突出した部位に、螺子孔28(図3,6参照)が形成されている。   Further, on the left and right support frames 15a and 15b, a plurality of mounting beams 26 are arranged between the respective vertical piece portions 22a and 22b at predetermined intervals in the longitudinal direction. Each of the mounting beams 26 is made of a metal square pipe, and both end portions of the mounting beams 26 are fitted into mounting holes (not shown) formed in the vertical piece portions 22a and 22b, respectively. It is joined to the hole edge via welding. The mounting beam 26 is one on which the above-mentioned grating lid 13 is mounted. When the grating lid 13 is mounted, the upper surface of the grating lid 13 is a vertical piece 22a, 22b of the support frame 15a, 15b. The vertical position is determined so that the vertical position is set to be substantially the same as the upper end of the vertical piece 22a, 22b. Further, such mounting beams 26 are arranged in the longitudinal direction at a predetermined interval shorter than the length of the grating lid 13 so as to support a plurality of grating lids 13. Then, connecting plate pieces 27 along the substantially horizontal direction are joined to the lower surface of the mounting beam 26 by welding on the two mounting beams 26 located near both ends of the mounted grating lid 13. Has been done. Here, in the present embodiment, the connecting plate pieces 27 arranged on the two mounting beams 26 are provided so as to project from the respective mounting beams 26 toward both ends of the grating lid. Has been. A screw hole 28 (see FIGS. 3 and 6) is formed in the connecting plate piece 27 at a portion protruding from the mounting beam 26.

一方、上述したグレーチング蓋13は、図1〜3に示すように、上述した乗載梁26に乗載されて、対向する両垂直片部22a,22b間に形成された通水部9を被覆する。グレーチング蓋13は、鉄鋼又はステンレス鋼からなる金属材によりに形成されており、溝路1の長手方向に沿う複数のメインバー31と、該メインバー31に直交する適数本のクロスバー32と、該クロスバー32に沿って各メインバー31の両端部に配設されたサイドバー33とから構成され、複数のメインバー31が所定間隔wをおいて並列状に配設されている。ここで、本実施例のグレーチング蓋13は、極細目タイプのものであり、隣合うメインバー31の間隔wが6mmに設定されたものである。さらに、グレーチング蓋13には、乗載梁26に乗載された状態で、両端寄りの二個の乗載梁26に夫々接合された連結板片27の直上に位置するように、断面略U形状の連結枠片35が下方に突出するように設けられている。連結枠片35は、略水平方向に沿った板状の底面部35aと、該底面部35aの両端から夫々起立する側部35bとを備え、各側部35bの上端がメインバー31の下端に溶接を介して接合されている。そして、連結枠片35の底面部35aには、隣合うメインバー31の直下となる部位に、該メインバー31の長手方向に沿って長孔状の透孔36が開口形成されている(図6,9参照)。こうした連結枠片35は、その上下方向高さが、上記した乗載梁26と略同じ高さに設定されており、グレーチング蓋13を乗載梁26に乗載した状態で、該連結枠片35の底面部35aが連結板片27の直上に位置する。そして、この状態で、連結枠片35の透孔36が、連結板片27の螺子孔28に重なる。この透孔36と螺子孔28とが重なった状態で、六角穴付きボルト41を、上方から該透孔36を挿通させて螺子孔28に螺合させる。そして、六角穴付きボルト41を締付方向に螺回操作して螺子孔28と締結させることにより、連結枠片35と連結板片27とを連結させ、該連結を介して、グレーチング蓋13を蓋受枠12に連結して固定できる。ここで、連結枠片35の底面部35aとメインバー31との間には、六角穴付きボルト41を連結板片27に螺合させる際に上下移動可能な間隙が形成されており、該間隙内に六角穴付きボルト41の頭部42が収容される。   On the other hand, as shown in FIGS. 1 to 3, the above-mentioned grating lid 13 is mounted on the above-mentioned mounting beam 26 and covers the water passage portion 9 formed between the opposing vertical piece portions 22a and 22b. To do. The grating lid 13 is formed of a metal material made of steel or stainless steel, and has a plurality of main bars 31 along the longitudinal direction of the groove 1, and an appropriate number of cross bars 32 orthogonal to the main bars 31. , Side bars 33 arranged at both ends of each main bar 31 along the cross bar 32, and a plurality of main bars 31 are arranged in parallel at predetermined intervals w. Here, the grating lid 13 of the present embodiment is of an extremely fine type, and the interval w between the adjacent main bars 31 is set to 6 mm. Further, the cross section of the grating lid 13 is substantially U so as to be positioned directly above the connecting plate pieces 27 respectively joined to the two mounting beams 26 near both ends while being mounted on the mounting beam 26. The shaped connecting frame piece 35 is provided so as to project downward. The connection frame piece 35 includes a plate-shaped bottom surface portion 35a extending substantially in the horizontal direction and side portions 35b standing up from both ends of the bottom surface portion 35a, and the upper ends of the respective side portions 35b are the lower ends of the main bars 31. It is joined via welding. In addition, in the bottom surface portion 35a of the connecting frame piece 35, a long hole-shaped through hole 36 is formed along the longitudinal direction of the main bar 31 at a position immediately below the adjacent main bar 31 (FIG. 6 and 9). The vertical height of the connecting frame piece 35 is set to be substantially the same as that of the mounting beam 26 described above, and the connecting frame piece 35 is mounted on the mounting beam 26 with the grating lid 13 mounted thereon. The bottom surface portion 35 a of 35 is located directly above the connecting plate piece 27. Then, in this state, the through hole 36 of the connecting frame piece 35 overlaps with the screw hole 28 of the connecting plate piece 27. With the through hole 36 and the screw hole 28 overlapping, the hexagon socket head cap screw 41 is inserted into the through hole 36 from above and screwed into the screw hole 28. Then, the hexagon socket head cap screw 41 is screwed in the tightening direction to be fastened to the screw hole 28, so that the connecting frame piece 35 and the connecting plate piece 27 are connected, and the grating lid 13 is connected through the connection. It can be connected and fixed to the lid receiving frame 12. Here, between the bottom surface portion 35a of the connecting frame piece 35 and the main bar 31, there is formed a gap that can be moved vertically when the hexagon socket head bolt 41 is screwed into the connecting plate piece 27. The head 42 of the hexagon socket head cap screw 41 is housed therein.

このようにグレーチング蓋13を、蓋受枠12の乗載梁26に乗載して、上下に並んだ該グレーチング蓋13の連結枠片35の底面部35aと該蓋受枠12の連結板片27とを、六角穴付きボルト41で締結することで、蓋受枠12にグレーチング蓋13を固定できる。また、この固定状態で、六角穴付きボルト41を締結解除することにより、グレーチング蓋13を、蓋受枠12から取り外すことも可能である。尚、本実施例にあって、蓋受枠12の連結板片27とグレーチング蓋13の連結枠片35とが、本発明にかかる一対の連結部に相当する。   In this way, the grating lid 13 is mounted on the mounting beam 26 of the lid receiving frame 12, and the bottom surface portion 35a of the connecting frame piece 35 of the grating lid 13 and the connecting plate piece 27 of the lid receiving frame 12 are arranged vertically. The grating lid 13 can be fixed to the lid receiving frame 12 by fastening with a hexagon socket head cap screw 41. Further, in this fixed state, the grating lid 13 can be removed from the lid receiving frame 12 by unfastening the hexagon socket head cap screw 41. In this embodiment, the connecting plate piece 27 of the lid receiving frame 12 and the connecting frame piece 35 of the grating lid 13 correspond to a pair of connecting portions according to the present invention.

以下に、本発明にかかる実施例1,2のレンチ工具51,71について,夫々説明する。   The wrench tools 51, 71 of the first and second embodiments of the present invention will be described below.

実施例1のレンチ工具51は、上記した六角穴付きボルト41を螺回操作するものであり、グレーチング蓋13を蓋受枠12に固定する作業や固定解除する作業に用いられる。ここで、操作対象の六角穴付きボルト41には、「JIS B 1176」に適合するものを用いており、上記した本実施例のグレーチング蓋13を蓋受枠12に固定するに必要な締付強度を発揮できるM8(ねじの呼び径)のものを使用している。この六角穴付きボルト41は、その頭部42の外径が約13mmであり、該頭部42に略正六角形状の六角穴45が上方開口されている。そして、この六角穴45は、その対角間の距離が約6.9mmで且つ対面間の距離が約6mmである。尚、上記した連結板片27の螺子孔28は、この六角穴付きボルト41の螺子部43と螺合する雌螺子が形成されたものであり、連結枠片35の透孔36は、該六角穴付きボルト41の螺子部43を挿通可能とし且つ頭部42を挿通不能とする孔径により形成されている。本実施例にあって、六角穴付きボルト41が、本発明にかかる多角形穴付きボルトに相当し、頭部42の六角穴45が、本発明にかかる多角形穴に相当する。   The wrench tool 51 of the first embodiment is for screwing the hexagon socket head cap screw 41 described above, and is used for fixing the grating lid 13 to the lid receiving frame 12 and for releasing the fixing. Here, as the hexagon socket head cap screw 41 to be operated, a bolt conforming to "JIS B 1176" is used, and the tightening strength required to fix the above-mentioned grating lid 13 to the lid receiving frame 12 is used. Uses M8 (nominal screw diameter) that can demonstrate The hexagon socket head cap screw 41 has a head portion 42 having an outer diameter of about 13 mm, and a substantially regular hexagonal hexagon socket 45 is opened in the head portion 42. The hexagonal hole 45 has a diagonal distance of about 6.9 mm and a facing distance of about 6 mm. The screw hole 28 of the connecting plate piece 27 is formed with a female screw which is screwed with the screw portion 43 of the hexagon socket head bolt 41, and the through hole 36 of the connecting frame piece 35 is It is formed with a hole diameter that allows the threaded portion 43 of the bolt 41 with a hole to be inserted therethrough, but does not allow the head portion 42 to be inserted. In the present embodiment, the hexagon socket head bolt 41 corresponds to the polygon socket head bolt according to the present invention, and the hexagon socket 45 of the head portion 42 corresponds to the polygon socket according to the present invention.

こうした本実施例の六角穴付きボルト41は、その頭部42の外径(約13mm)が、図3に示すように、グレーチング蓋13のメインバー31の間隔w(約6mm)よりも大きいことから、該メインバー31の隙間を通過させることができない。そのため、グレーチング蓋13を蓋受枠12の乗載梁26に乗載させる前に、六角穴付きボルト41は、その螺子部43が透孔36に挿通されて、その頭部42がメインバー31と連結枠片35の底面部35aとの間隙に収容される(図6参照)。そして、このグレーチング蓋13を蓋受枠12の乗載梁26に乗載した状態で、本実施例1のレンチ工具51を用いて、六角穴付きボルト41を螺回操作する(図6〜8参照)。   In the hexagon socket head cap screw 41 of this embodiment, the outer diameter (about 13 mm) of the head 42 is larger than the interval w (about 6 mm) between the main bars 31 of the grating lid 13 as shown in FIG. Therefore, it cannot pass through the gap of the main bar 31. Therefore, before mounting the grating lid 13 on the mounting beam 26 of the lid receiving frame 12, the screw portion 43 of the hexagon socket head bolt 41 is inserted into the through hole 36, and the head portion 42 of the hexagon socket head bolt 41 becomes the main bar 31. The connection frame piece 35 is housed in the gap between the bottom surface portion 35a (see FIG. 6). Then, with the grating lid 13 mounted on the mounting beam 26 of the lid receiving frame 12, the hexagon socket head cap screw 41 is screwed by using the wrench tool 51 of the first embodiment (see FIGS. 6 to 8). ).

実施例1のレンチ工具51は、図4,5に示すように、長尺杆状のレンチ軸部52と、該レンチ軸部52の基端部に連結された操作部53とを備えた略T形状のものである。そして、レンチ軸部52は、先端部分の係合角形部55と、該係合角形部55の後端に連成された挿通杆部56と、該挿通杆部56の後端に連成された角形残存部57とから構成されている。角形残存部57の後端部がレンチ軸部52の基端部であり、該後端部に、比較的長尺な円柱状の操作部53の長手方向中央部が溶接を介して接合されている。尚、操作部53は、円柱状に限らず、レンチ軸部52と同様の六角柱状、または四角柱状などの多角柱状のものを適用することもできる。   As shown in FIGS. 4 and 5, the wrench tool 51 of the first embodiment includes a long rod-shaped wrench shaft portion 52 and an operating portion 53 connected to the base end portion of the wrench shaft portion 52. It has a T shape. The wrench shaft portion 52 is connected to the engagement square portion 55 at the front end portion, the insertion rod portion 56 connected to the rear end of the engagement square portion 55, and the rear end of the insertion rod portion 56. And a square-shaped remaining portion 57. The rear end portion of the square remaining portion 57 is the base end portion of the wrench shaft portion 52, and the central portion in the longitudinal direction of the relatively long cylindrical operation portion 53 is joined to the rear end portion by welding. There is. The operation unit 53 is not limited to the columnar shape, and a polygonal columnar shape such as a hexagonal columnar shape similar to the wrench shaft portion 52 or a quadrangular prismatic shape may be applied.

係合角形部55は、六角柱状を成し、上記した六角穴付きボルト41の六角穴45に嵌入可能に設けられている。ここで、係合角形部55は、レンチ軸部52の軸線と直交する横断面が、六角穴付きボルト41の六角穴45と同じ六角形状であり、前記六角穴45にスムーズに抜き差しできるように、該六角穴45よりも僅かに小さい寸法(下限許容寸法)で形成されている。本実施例1では、係合角形部55の横断面が正六角形状であり、該横断面における対角間の間隔tが全て同じで且つ対面62,62間の間隔sも全て同じである。そして、本実施例1にあって、係合角形部55は、前記対角間の間隔tが6.9mmよりも僅かに短く(t=6.85mm)、且つ対面62,62間の間隔sが6mmよりも僅かに短い(s=5.95mm)。こうした形状寸法の係合角形部55は、対角間の間隔tが、グレーチング蓋13のメインバー31の間隔wよりも長く、且つ対面62,62間の間隔sが、該メインバー31の間隔wよりも短い。これにより、係合角形部55は、いずれか一対の対面62,62をメインバー31の長手方向と略平行にした状態で、隣合うメインバー31の隙間を挿通可能であると共に、該隙間内で回転不能である(図7,9参照)。また、係合角形部55は、メインバー31の下方で六角穴付きボルト41の六角穴45に嵌入された状態で、該メインバー31と連結枠片35の底面部35aとの間隙内に収まるように、該メインバー31と連結枠片35の底面部35aとの間隔よりも短い所定長さ寸法に設定されている。これにより、係合角形部55は、グレーチング蓋13の上方からメインバー31間に挿入させて下方に突出させることで、該メインバー31と連結枠片35の底面部35aとの間隙内に進入させ得る。   The engaging square portion 55 has a hexagonal columnar shape and is provided so that it can be fitted into the hexagonal hole 45 of the hexagon socket head bolt 41 described above. Here, the engagement square portion 55 has a cross section orthogonal to the axis of the wrench shaft portion 52, which is the same hexagonal shape as the hexagonal hole 45 of the hexagon socket head cap screw 41, so that the engaging square piece 55 can be smoothly inserted into and removed from the hexagonal hole 45. , Which is slightly smaller than the hexagonal hole 45 (lower limit allowable dimension). In the first embodiment, the cross section of the engaging rectangular portion 55 has a regular hexagonal shape, the intervals t between the diagonals in the cross section are all the same, and the intervals s between the facing surfaces 62, 62 are also the same. In the first embodiment, in the engagement square portion 55, the distance t between the diagonals is slightly shorter than 6.9 mm (t = 6.85 mm), and the distance s between the facing surfaces 62, 62 is small. Slightly shorter than 6 mm (s = 5.95 mm). In the engagement square portion 55 having such a shape and dimension, the distance t between the diagonals is longer than the distance w between the main bars 31 of the grating lid 13, and the distance s between the facing surfaces 62, 62 is the distance w between the main bars 31. Shorter than. As a result, the engagement square portion 55 can be inserted into the gap between the adjacent main bars 31 in a state where any one of the pair of facing surfaces 62, 62 is substantially parallel to the longitudinal direction of the main bar 31, and within the gap. Therefore, it cannot rotate (see FIGS. 7 and 9). Further, the engaging square portion 55 is fitted into the hexagonal hole 45 of the hexagon socket head cap bolt 41 below the main bar 31, and is fitted in the gap between the main bar 31 and the bottom surface portion 35 a of the connecting frame piece 35. As described above, the length is set to a predetermined length shorter than the distance between the main bar 31 and the bottom surface portion 35a of the connecting frame piece 35. As a result, the engagement square portion 55 is inserted into the space between the main bars 31 from above the grating lid 13 and protrudes downward to enter the gap between the main bars 31 and the bottom surface portion 35 a of the coupling frame piece 35. Can be done.

また、挿通杆部56は、円柱状をなし、その外径rが、上記係合角形部55の対面62,62間の間隔s以下の所定径寸法に設定されている。具体的には、挿通杆部56の外径rは、対面62,62間の間隔sよりも僅かに短い寸法(r=5.9mm)としている。さらに、挿通杆部56の長さ寸法が、メインバー31の上下方向幅よりも長い所定長さ寸法に設定されている(図8参照)。そのため、レンチ軸部52は、図8,10ように、係合角形部55をメインバー31の下方に位置させ且つ角形残存部57を該メインバー31の上方に位置させた、挿通杆部56を隣合うメインバー31の隙間に挿通させた状態で、回転可能となっている。   Further, the insertion rod portion 56 has a cylindrical shape, and the outer diameter r thereof is set to a predetermined diameter dimension which is equal to or less than the interval s between the facing surfaces 62, 62 of the engagement square portion 55. Specifically, the outer diameter r of the insertion rod portion 56 has a dimension (r = 5.9 mm) slightly shorter than the interval s between the facing surfaces 62, 62. Further, the length dimension of the insertion rod portion 56 is set to a predetermined length dimension longer than the vertical width of the main bar 31 (see FIG. 8). Therefore, as shown in FIGS. 8 and 10, the wrench shaft portion 52 has the insertion rod portion 56 in which the engaging square portion 55 is located below the main bar 31 and the square remaining portion 57 is located above the main bar 31. Can be rotated while being inserted into the gap between the adjacent main bars 31.

また、角形残存部57は、図4,5に示すように、上記した係合角形部55と同じ断面六角形(横断面の寸法形状が同じ六角形)からなる六角柱をなすものである。そのため、角形残存部57にあっても、係合角形部55と同様に、一対の対面(図示せず)をメインバー31の長手方向と略平行な状態とすることで、隣合うメインバー31の隙間を挿通可能であり、該隙間内で回転不能である。そして、角形残存部57は、一対の対面をメインバー31の長手方向と非平行な状態で、隣合うメインバー31の隙間に挿通不能である。   Further, as shown in FIGS. 4 and 5, the remaining polygonal portion 57 is a hexagonal column having the same hexagonal cross section (hexagonal having the same cross-sectional dimension and shape) as the engaging squared portion 55 described above. Therefore, even in the square remaining portion 57, as in the engaging square portion 55, the pair of facing surfaces (not shown) are set substantially parallel to the longitudinal direction of the main bars 31, so that the adjacent main bars 31 are not in contact with each other. Can be inserted through the gap and cannot rotate in the gap. The rectangular remaining portion 57 cannot be inserted into the gap between the adjacent main bars 31 in a state where the pair of facing surfaces are not parallel to the longitudinal direction of the main bars 31.

上記の係合角形部55、挿通杆部56、および角形残存部57は、レンチ軸部52の軸中心線を中心とする同心状に形成されている。これにより、レンチ軸部52では、軸中心線を中心として、係合角形部55と挿通杆部56と角形残存部57とが周方向に回転でき、回転中に各部が偏心しない。   The engagement square portion 55, the insertion rod portion 56, and the square remaining portion 57 are formed concentrically around the axis center line of the wrench shaft portion 52. As a result, in the wrench shaft portion 52, the engagement square portion 55, the insertion rod portion 56, and the square remaining portion 57 can rotate in the circumferential direction about the shaft center line, and the respective portions are not eccentric during rotation.

こうしたレンチ軸部52は、鉄鋼又はステンレス鋼からなる六角柱状の金属製棒材を加工することで成形できる。すなわち、係合角形部55(および角形残存部57)の六角柱と同じ寸法形状に成形した金属製棒材を、所定の長さ寸法に切断する。そして、その一端から該係合角形部55の長さ寸法をおいて、他端側へ切削加工することにより、円柱状の挿通杆部56を形成する。ここで、切削加工する長さ寸法により、所定長さの挿通杆部56が形成されると共に、該挿通杆部56の他端側部分が、切削加工されずに残り、角形残存部57となる。このように、レンチ軸部52は、一本の金属製棒材の一部分を切削加工して成形できることから、比較的容易に成形することができると共に、係合角形部55と挿通杆部56と角形残存部57とを同心状に正確に成形できる。この切削加工による製造方法では、例えば、各部位(係合角形部55、挿通杆部56、角形残存部57)を夫々別々に成形した後に溶接する製造方法に比して、該溶接工程を必要とせず、さらに、各部位の中心を合わせる工程も必要としない。そのため、切削加工による製造方法は、溶接による製造方法に比して、成形工程が少なく、成形に要するコストと時間を削減できる。   The wrench shaft 52 can be formed by processing a hexagonal columnar metal rod made of steel or stainless steel. That is, a metal rod formed into the same size and shape as the hexagonal column of the engaging square portion 55 (and the square remaining portion 57) is cut into a predetermined length dimension. Then, a length dimension of the engaging rectangular portion 55 is provided from one end thereof, and the other end side is cut to form a cylindrical insertion rod portion 56. Here, the insertion rod portion 56 having a predetermined length is formed according to the length dimension to be cut, and the other end side portion of the insertion rod portion 56 remains without being cut and becomes the square remaining portion 57. .. As described above, since the wrench shaft portion 52 can be formed by cutting a part of one metal rod, the wrench shaft portion 52 can be formed relatively easily, and the engaging square portion 55 and the insertion rod portion 56 can be formed. The square remaining portion 57 can be accurately formed concentrically. In the manufacturing method by this cutting process, for example, the welding step is required as compared with the manufacturing method in which the respective parts (engaging square portion 55, insertion rod portion 56, square remaining portion 57) are separately formed and then welded. In addition, the step of aligning the centers of the respective parts is not required. Therefore, the manufacturing method by cutting has fewer molding steps than the manufacturing method by welding, and the cost and time required for molding can be reduced.

次に、上述した本実施例1のレンチ工具51の使用態様について説明する。
例えば、上述した溝路用通水被覆装置11を溝路1に配設する施工作業では、溝路1の側壁4a,4bに左右の支持枠15a,15bを夫々配設した後に、該支持枠15a,15bで形成される通水部9を覆うにようにグレーチング蓋13を配設する。グレーチング蓋13の配設作業にあって、該グレーチング蓋13は、図6,9に示すように、各連結枠片35の透孔36に六角穴付きボルト41を挿通させた状態で、支持枠15a,15bの乗載梁26に乗載される。この際に、連結枠片35を、乗載梁26に接合された連結板片27の直上に位置させることで、該連結枠片35の透孔36と連結板片27の螺子孔28とを上下方向に重ねる。
Next, a usage mode of the wrench tool 51 of the first embodiment described above will be described.
For example, in the construction work for arranging the above-mentioned water passage covering device 11 for a groove in the groove 1, after arranging the left and right support frames 15a, 15b on the side walls 4a, 4b of the groove 1, respectively, The grating lid 13 is arranged so as to cover the water passage portion 9 formed by 15a and 15b. In the operation of disposing the grating lid 13, as shown in FIGS. It is mounted on the mounting beams 26 of 15a and 15b. At this time, by arranging the connecting frame piece 35 directly above the connecting plate piece 27 joined to the mounting beam 26, the through hole 36 of the connecting frame piece 35 and the screw hole 28 of the connecting plate piece 27 are formed. Stack vertically.

このようにグレーチング蓋13を乗載した状態で、レンチ工具51を用いて、六角穴付きボルト41を連結板片27の螺子孔28に螺合させる。すなわち、レンチ軸部52の係合角形部55を、図6,9に示すように、いずれか一対の対面62,62(図5参照)がグレーチング蓋13のメインバー31の長手方向と略平行となる状態として、該グレーチング蓋13の上方から隣合うメインバー31の隙間に挿通させる。そして、係合角形部55を、図7に示すように、メインバー31の下方に突出させて、六角穴付きボルト41の六角穴45に嵌入して係合させると共に、当該レンチ工具51の挿通杆部56を隣合うメインバー31間に挿通した状態で保つ。この状態で、作業者がレンチ工具51を回動操作することにより、六角穴付きボルト41を、乗載梁26の連結板片27に形成された螺子孔28に螺合させる。そして、六角穴付きボルト41と連結板片27とを締め付けることで、図8,10に示すように、該連結板片27と連結枠片35とを連結させ、当該連結を介して、グレーチング蓋13を蓋受枠12に固定できる。尚、六角穴付きボルト41を締め付けた後には、挿入時と同様に、係合角形部55の一対の対面62,62をメインバー31の長手方向と略平行とした状態として、レンチ軸部52をメインバー31の隙間から取り出す。   With the grating lid 13 thus mounted, the hexagon socket head cap screw 41 is screwed into the screw hole 28 of the connecting plate piece 27 using the wrench tool 51. That is, as shown in FIGS. 6 and 9, one of the pair of facing surfaces 62, 62 (see FIG. 5) of the engaging rectangular portion 55 of the wrench shaft portion 52 is substantially parallel to the longitudinal direction of the main bar 31 of the grating lid 13. In this state, the grating lid 13 is inserted into the gap between the adjacent main bars 31 from above. Then, as shown in FIG. 7, the engaging square portion 55 is projected below the main bar 31, is fitted into the hexagonal hole 45 of the hexagon socket head cap screw 41 to be engaged, and the wrench tool 51 is inserted. The rod 56 is kept inserted between the adjacent main bars 31. In this state, the operator rotates the wrench tool 51 to screw the hexagon socket head cap screw 41 into the screw hole 28 formed in the connecting plate piece 27 of the mounting beam 26. Then, by tightening the hexagon socket head cap screw 41 and the connection plate piece 27, as shown in FIGS. 8 and 10, the connection plate piece 27 and the connection frame piece 35 are connected, and the grating lid is connected through the connection. 13 can be fixed to the lid receiving frame 12. After tightening the hexagon socket head cap screw 41, the pair of facing surfaces 62, 62 of the engaging rectangular portion 55 are set to be substantially parallel to the longitudinal direction of the main bar 31 and then the wrench shaft portion 52, as in the insertion. Is taken out from the gap of the main bar 31.

また、溝路用通水被覆装置11の施工後にメンテナンスや改修などの保全作業をする際にあって、グレーチング蓋13を蓋受枠12から取り外すときにも、上述と同様に、レンチ工具51のレンチ軸部52をメインバー31間に挿通させて六角穴付きボルト41を螺回操作することで、該六角穴付きボルト41と乗載梁26の連結板片27とを螺合解除できる。さらに、その後に再びグレーチング蓋13を取り付ける際には、上述した施工時と同様に、レンチ工具51により作業できる。   In addition, when performing maintenance work such as maintenance or repair after construction of the water passage covering device 11 for the ditch, when the grating lid 13 is removed from the lid receiving frame 12, the wrench of the wrench tool 51 is similar to the above. By inserting the shaft portion 52 between the main bars 31 and screwing the hexagon socket head bolt 41, the hexagon socket head bolt 41 and the connecting plate piece 27 of the mounting beam 26 can be unscrewed. Further, when the grating lid 13 is attached again after that, the wrench tool 51 can be used as in the above-described construction.

このように本実施例1のレンチ工具51によれば、所望の締付強度を有する六角穴付きボルト41を、極細目タイプのグレーチング蓋13の固定に用いた溝路用通水被覆装置11にあっても、メインバー31間の隙間を介して該六角穴付きボルト41を螺回操作して、該グレーチング蓋13を蓋受枠12に固定および固定解除することができる。すなわち、レンチ工具51は、メインバー31の間隔wが係合角形部55の対角の間隔tよりも短いグレーチング蓋13であっても、該メインバー31の下方に配した六角穴付きボルト41を螺回操作することができる。これにより、メインバー31の間隔wが6mm以下の極細目タイプのグレーチング蓋13であっても、該グレーチング蓋13に適した締付強度の六角穴付きボルト41を用いて固定することが可能である。したがって、本実施例1のレンチ工具51を用いる場合には、クライアントから要求される極細目タイプのグレーチング蓋を備えた溝路用通水被覆装置を、提供することができる。尚ここで、レンチ工具51は、メインバー31間の隙間に挿通されて螺回操作できるものであるから、上述した従来構成のようにメインバーの一部分を切り取った構造のグレーチング蓋を要せず、該従来のグレーチング蓋で発生する問題(強度や剛性の低下、および杖の先端などが挟まること等)も無い。   As described above, according to the wrench tool 51 of the first embodiment, the hexagon socket head cap screw 41 having a desired tightening strength is applied to the water passage covering device 11 for a groove used for fixing the extra fine type grating lid 13. Even if there is, the hexagon socket head cap screw 41 can be screwed through the gap between the main bars 31 to fix and release the grating lid 13 to the lid receiving frame 12. That is, in the wrench tool 51, the hexagon socket head cap bolts 41 arranged below the main bar 31 even if the spacing w between the main bars 31 is shorter than the diagonal distance t between the engaging rectangular portions 55. Can be operated by screwing. As a result, even if the spacing w between the main bars 31 is 6 mm or less, it is possible to fix it by using the hexagon socket head cap bolt 41 having a tightening strength suitable for the grating lid 13. is there. Therefore, in the case of using the wrench tool 51 of the first embodiment, it is possible to provide a water passage covering device for a groove provided with an extra fine type grating lid required by a client. Here, since the wrench tool 51 can be screwed by being inserted into the gap between the main bars 31, a grating lid having a structure in which a part of the main bar is cut off as in the above-described conventional configuration is not required. Also, there is no problem that occurs in the conventional grating lid (reduction in strength and rigidity, pinching of the tip of a cane, etc.).

また、レンチ工具51は、六角穴付きボルト41の六角穴45に係合される係合角形部55が、該メインバー31の隙間内で回転不能であり、挿通杆部56を該メインバー31の隙間に挿通させた状態でのみ、該六角穴付きボルト41を螺回操作できるものである。そのため、本実施例1のレンチ工具51によりグレーチング蓋13を固定した状態の六角穴付きボルト41は、一般的に市販されている六角柱状の六角レンチ(挿通杆部56を備えないもの)では螺回操作することができない。これにより、グレーチング蓋13の盗難を防止する効果やいたずらを防止する効果を向上できるという優れた利点もある。   Further, in the wrench tool 51, the engagement square portion 55 that is engaged with the hexagonal hole 45 of the hexagon socket head bolt 41 cannot rotate within the gap of the main bar 31, and the insertion rod portion 56 is attached to the main bar 31. The hexagon socket head cap screw 41 can be screwed only when it is inserted into the gap. Therefore, the hexagon socket head cap screw 41 in the state where the grating lid 13 is fixed by the wrench tool 51 of the first embodiment is screwed with a generally commercially available hexagonal column-shaped hexagon wrench (one having no insertion rod 56). Can not be operated twice. This has an excellent advantage that the effect of preventing the grating lid 13 from being stolen and the effect of preventing mischief can be improved.

また、本実施例1のレンチ工具51は、上述したように、鉄鋼又はステンレス鋼からなる六角柱状の金属製棒材を切削加工することにより、レンチ軸部52を成形できる。こうした切削加工による製造方法によれば、レンチ軸部52を容易に成形することができると共に、係合角形部55と挿通杆部56と角形残存部57とを同心状に正確に成形し易いことから、比較的長尺であっても、部分的に偏心して回動することが無く、螺回操作を容易かつ安定して行い得るレンチ軸部52を成形できる。   In addition, as described above, the wrench tool 51 of the first embodiment can form the wrench shaft portion 52 by cutting a hexagonal columnar metal rod made of steel or stainless steel. According to such a manufacturing method by cutting, the wrench shaft portion 52 can be easily formed, and the engaging square portion 55, the insertion rod portion 56, and the square remaining portion 57 can be easily formed concentrically and accurately. Therefore, even if it is relatively long, it is possible to mold the wrench shaft portion 52 that is not eccentrically partly rotated and can be easily and stably screwed.

実施例2のレンチ工具71は、上述した実施例1と同様、略T形状をなすものであり、グレーチング蓋13を蓋受枠12に固定する六角穴付きボルト41を螺回操作するものである。このレンチ工具71にあって、レンチ軸部72の係合角形部75は、図11,12に示すように、一対の対面82a,82a間の間隔s1が、他の対面82b,82b間の間隔s2に比して僅かに短く、かつ挿通杆部56の外径rと同じ寸法となっている。ここで、一対の対面82a,82aが、本発明にかかる特定の一対の対面に相当する。尚、本実施例2は、係合角形部75の一対の対面82a,82aが異なる以外は上述した実施例1と同じであり、同じ構成要素には同じ符号を記し、その説明を適宜省略した。   The wrench tool 71 of the second embodiment has a substantially T-shape similar to that of the first embodiment described above, and is one in which the hexagon socket head cap bolt 41 for fixing the grating lid 13 to the lid receiving frame 12 is screwed. In this wrench tool 71, in the engagement square portion 75 of the wrench shaft portion 72, as shown in FIGS. 11 and 12, the spacing s1 between the pair of facing surfaces 82a and 82a is the spacing between the other facing surfaces 82b and 82b. It is slightly shorter than s2 and has the same size as the outer diameter r of the insertion rod 56. Here, the pair of facing surfaces 82a, 82a correspond to a specific pair of facing surfaces according to the present invention. The second embodiment is the same as the above-described first embodiment except that the pair of facing surfaces 82a, 82a of the engagement square portion 75 are different, the same components are denoted by the same reference numerals, and the description thereof will be appropriately omitted. ..

本実施例2の係合角形部75は、横断面が正六角形の六角柱の一対の対面を、切削加工することにより成形することが可能である。こうして成形された係合角形部75は、一対の対面82a,82a間の間隔s1が、挿通杆部56の外径rと同じ5.9mmであり、他の対面82b,82b間の間隔s2が5.95mmである。尚、本実施例2の係合角形部75は、厳密に言えば、横断面が正六角形でないが、前記間隔s1と間隔s2との差が極僅かであることから、略正六角形と言える。   The engaging prismatic portion 75 of the second embodiment can be formed by cutting a pair of facing faces of a hexagonal column having a regular hexagonal cross section. In the engagement square portion 75 thus formed, the distance s1 between the pair of facing surfaces 82a and 82a is 5.9 mm, which is the same as the outer diameter r of the insertion rod 56, and the distance s2 between the other facing surfaces 82b and 82b is equal to the distance s2. It is 5.95 mm. Strictly speaking, the engaging square portion 75 of the second embodiment is not a regular hexagon in cross section, but can be said to be a substantially regular hexagon because the difference between the spacing s1 and the spacing s2 is extremely small.

こうした本実施例2のレンチ工具71は、図13に示すように、一対の対面82a,82a間をメインバー31の長手方向と略平行にした状態で、隣合うメインバー31の隙間に一層容易に挿通され得る。これは、当該一対の対面82a,82a間の間隔s1をメインバー31の長手方向と略平行にした状態では、隣合うメインバー31の隙間とのクリアランスが、他の対面82b,82bを該長手方向と略平行とした場合に比して広くなるためである。   With such a wrench tool 71 of the second embodiment, as shown in FIG. 13, in a state where the pair of facing surfaces 82a, 82a are substantially parallel to the longitudinal direction of the main bar 31, the gap between the adjacent main bars 31 is easier. Can be inserted through. This is because when the space s1 between the pair of facing surfaces 82a, 82a is substantially parallel to the longitudinal direction of the main bar 31, the clearance between the adjacent main bars 31 is longer than the other facing surfaces 82b, 82b. This is because it is wider than in the case where the direction is substantially parallel.

本実施例2のレンチ工具71にあっても、上述した実施例1の構成と同様の作用効果を奏し得る。さらに、一対の対面82a,82a間をメインバー31の長手方向と略平行にした状態で隣合うメインバー31の隙間に挿通させることにより、レンチ軸部72の係合角形部75を該隙間に一層容易に挿通させ得ることから、該係合角形部75を該隙間に抜き挿し易くなり、六角穴付きボルト41を螺回操作する作業性が一層向上する。   The wrench tool 71 according to the second embodiment can also achieve the same operational effects as the configuration of the first embodiment described above. Further, by inserting the pair of facing surfaces 82a, 82a into the gap between the adjacent main bars 31 in a state substantially parallel to the longitudinal direction of the main bar 31, the engaging square portion 75 of the wrench shaft portion 72 is inserted into the gap. Since it can be inserted more easily, the engaging rectangular portion 75 can be easily inserted into and removed from the gap, and the workability of screwing the hexagon socket head cap screw 41 is further improved.

本発明にあっては、上述した実施例1,2に限定されるものではなく、これら実施例以外の構成についても本発明の趣旨の範囲内で適宜変更して実施可能である。
例えば、上述した実施例1,2のレンチ工具51,71は、六角穴付きボルト41を螺回操作するものであるが、四角穴付きボルトを螺回操作するレンチ工具であっても良い。かかるレンチ工具は、四角穴付きボルトの四角穴と同じ四角形の四角柱状の係合角形部と、該係合角形部の対面間の間隔以下の外径からなる挿通杆部と、該係合角形部を同じ四角柱状の角形残存部とからなるレンチ軸部を備えたものである。係合角形部の対面間の間隔および対角間の間隔と、隣合うメインバーの間隔との関係は、上述した実施例1,2と同様に設定できる。こうしたレンチ工具によれば、上述した実施例の六角穴付きボルト41に代えて四角穴付きボルトを使用した溝路用通水被覆装置にあって、該実施例1,2と同様に該四角穴付きボルトを螺回操作できることから、該実施例1,2と同様の作用効果を奏し得る。
The present invention is not limited to the first and second embodiments described above, and configurations other than these embodiments can be appropriately modified and implemented within the scope of the gist of the present invention.
For example, the wrench tools 51 and 71 of the above-described first and second embodiments are those that screw-operate the hexagon socket head bolt 41, but may be wrench tools that screw-operate the square socket head bolt. Such a wrench tool includes a square prismatic engagement square portion that is the same as the square hole of a square hole bolt, an insertion rod portion having an outer diameter equal to or less than the distance between the facing surfaces of the engagement square portion, and the engagement square shape. The part is provided with a wrench shaft part having the same rectangular column-shaped remaining part. The relationship between the distance between the facing surfaces and the distance between the diagonal corners of the engaging rectangular portion and the distance between the adjacent main bars can be set in the same manner as in the above-described first and second embodiments. According to such a wrench tool, in the water passage covering device for the groove using the bolt with a square hole instead of the bolt with a hexagonal hole 41 of the above-mentioned embodiment, the square hole is provided in the same manner as in the first and second embodiments. Since the attached bolt can be screwed, the same effects as those of the first and second embodiments can be obtained.

また、上述した実施例1,2のレンチ工具51,71は、レンチ軸部52の基端部に円柱状の操作部53の長手方向中央部が溶接されてなる略T形状のものであるが、これに限らず、様々な形態のものを適用できる。例えば、レンチ軸部52の基端部に円柱状の操作部53の一端部が溶接されてなる略L形状のものであっても良い。または、操作部が、杆状でなく、他の形状(例えば、略円環状等のハンドル形状)のものであっても良い。   The wrench tools 51, 71 of the first and second embodiments described above are substantially T-shaped by welding the central portion in the longitudinal direction of the cylindrical operation portion 53 to the base end portion of the wrench shaft portion 52. However, not limited to this, various forms can be applied. For example, it may be a substantially L-shaped one in which one end of a cylindrical operating portion 53 is welded to the base end of the wrench shaft portion 52. Alternatively, the operation portion may have a shape other than the rod shape (for example, a handle shape such as a substantially annular shape).

また、上述した実施例1,2では、レンチ軸部52が角形残存部57を備えた構成であるが、その他の構成として、レンチ軸部が係合角形部と挿通杆部とからなる構成としても良い。   Further, in the above-described Embodiments 1 and 2, the wrench shaft portion 52 is configured to include the square remaining portion 57, but as another configuration, the wrench shaft portion is configured to include the engaging square portion and the insertion rod portion. Is also good.

1 溝路
11 溝路用通水被覆装置
12 蓋受枠
13 グレーチング蓋
27 連結板片(連結部)
31 メインバー
35 連結枠片(連結部)
41 六角穴付きボルト(多角形穴付きボルト)
45 六角穴(多角形穴)
51,71 レンチ工具
52,72 レンチ軸部
53 操作部
55,75 係合角形部
56 挿通杆部
57 角形残存部
62,82a,82b 対面
DESCRIPTION OF SYMBOLS 1 Groove 11 Water passage covering device for groove 12 12 Lid receiving frame 13 Grating lid 27 Connecting plate piece (connecting part)
31 main bar 35 connecting frame piece (connecting part)
41 Hexagon socket head cap screw (polygon socket head cap screw)
45 Hexagon socket (Polygon socket)
51,71 Wrench tool 52,72 Wrench shaft part 53 Operating part 55,75 Engaging square part 56 Inserting rod part 57 Square remaining part 62,82a, 82b Opposing face

Claims (3)

溝路の上部に配設された蓋受枠に、所定間隔で並列した複数のメインバーを備えたグレーチング蓋が固定されてなる溝路用通水被覆装置の、施工作業または保全作業に用いられるものであって、該メインバーの下方で上下に並ぶ一対の連結部を連結させる、四角形状または六角形状の多角形穴を有する多角形穴付きボルトを、螺回操作するためのレンチ工具において、
長尺杆状のレンチ軸部と、該レンチ軸部の基端部に連結された操作部とから構成されてなるものであって、
前記レンチ軸部は、
前記多角形穴付きボルトの多角形穴に係脱可能に嵌入される、該多角形穴と同じ多角形の角柱状の係合角形部と、
該係合角形部の後端に連成され、該係合角形部の対面間の間隔以下の外径からなり且つ前記メインバーの上下方向幅よりも長い円柱状の挿通杆部と
を備え、
前記挿通杆部の外径と係合角形部の対面間の間隔とが、前記グレーチング蓋の隣合うメインバーの間隔よりも短く、かつ、該係合角形部の対角間の間隔が、隣合うメインバーの間隔よりも長いことを特徴とするレンチ工具。
Used for construction work or maintenance work of a water passage covering device for a ditch, in which a grating lid provided with a plurality of main bars arranged in parallel at a predetermined interval is fixed to a lid receiving frame arranged at the upper part of the ditch In a wrench tool for screwing a polygonal holed bolt having a square or hexagonal polygonal hole, which connects a pair of connecting parts arranged vertically below the main bar,
Comprising a long rod-shaped wrench shaft portion and an operation portion connected to the base end portion of the wrench shaft portion,
The wrench shaft is
A polygonal prismatic prismatic engagement prism portion that is removably fitted in the polygonal hole of the bolt having the polygonal hole;
A cylindrical insertion rod formed continuously with the rear end of the engaging square portion, having an outer diameter equal to or less than the distance between the facing surfaces of the engaging square portion, and having a length longer than the vertical width of the main bar;
The outer diameter of the insertion rod portion and the distance between the facing surfaces of the engaging rectangular portions are shorter than the distance between the adjacent main bars of the grating lid, and the distance between the diagonal portions of the engaging rectangular portions is adjacent to each other. A wrench tool characterized by being longer than the interval between main bars.
レンチ軸部は、挿通杆部の後端に連成された、係合角形部と同じ角柱形状の角形残存部を備えていることを特徴とする請求項1に記載のレンチ工具。   2. The wrench tool according to claim 1, wherein the wrench shaft portion is provided with a prism-shaped remaining portion that is connected to a rear end of the insertion rod portion and has the same prismatic shape as the engaging prism portion. レンチ軸部の係合角形部は、特定の一対の対面間の間隔が他の対面間の間隔よりも短いものであることを特徴とする請求項1又は請求項2に記載のレンチ工具。   The wrench tool according to claim 1 or 2, wherein the engagement square portion of the wrench shaft portion has a specific gap between the pair of facing surfaces shorter than a gap between the other facing surfaces.
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