JP2007002527A - Heavy cover - Google Patents

Heavy cover Download PDF

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JP2007002527A
JP2007002527A JP2005183890A JP2005183890A JP2007002527A JP 2007002527 A JP2007002527 A JP 2007002527A JP 2005183890 A JP2005183890 A JP 2005183890A JP 2005183890 A JP2005183890 A JP 2005183890A JP 2007002527 A JP2007002527 A JP 2007002527A
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fixing
hole
lid
screw
push
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JP4731217B2 (en
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Koichi Kubota
孝一 久保田
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Chugoku Electric Power Co Inc
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Chugoku Electric Power Co Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a heavy cover reduced in cost and allowing a lid to be positively pushed up. <P>SOLUTION: The heavy cover is provided with a frame having an opening, and the lid for closing the opening of the frame. The lid is formed with a plurality of internally threaded through-holes passing through in a thickness direction, and the frame is formed with a plurality of internally threaded fixing holes communicating with the respective through-holes. A pair of through-hole and fixing hole are used as a fixing part for fixing the lid and the frame with a fixing screw inserted from the through-hole side and fastened into at least the fixing hole, and used as a push-up part for pushing up the lid to the frame by blocking the opening of the fixing hole by a blocking means and allowing the tip of a push-up screw to abut on the blocking means with a push-up screw fastened into the through-hole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、電気用、上下水道用などのマンホール等の重量蓋に関する。   The present invention relates to a weight cover such as a manhole for electricity and water and sewage.

地中に電気ケーブルや水道管などを配設するために、ケーブルや配管の引き抜き、あるいはケーブルや配管を接続するために作業者が出入りすることができる程度の大きさのマンホールなどの重量蓋が設置される。   In order to install electric cables and water pipes in the ground, there is a heavy lid such as a manhole that is large enough to allow workers to go in and out to connect cables and pipes. Installed.

重量蓋は、道路などに設置される開口部を有する枠部と、枠部の開口部を塞ぐ蓋部とで構成されている。そして、蓋部と枠部とは、蓋部に厚さ方向に貫通して設けられた挿通孔を挿通させて枠部の固定孔に固定ねじを締結させることによって互いに固定されている。このような蓋部は固定ねじによって固定されることから枠部に固着されており、枠部から容易に取り外すことができない。このため、蓋部に厚さ方向に貫通して雌ねじが切られた貫通孔を設け、この貫通孔に押上ねじを締結させると共にその先端を枠部に当接させることで、蓋部を枠部に対して押し上げて両者の固着を解除するようになっている。   The weight lid is composed of a frame portion having an opening portion installed on a road or the like and a lid portion that closes the opening portion of the frame portion. The lid portion and the frame portion are fixed to each other by inserting an insertion hole provided through the lid portion in the thickness direction and fastening a fixing screw to the fixing hole of the frame portion. Since such a lid portion is fixed by a fixing screw, it is fixed to the frame portion and cannot be easily removed from the frame portion. For this reason, the cover part is provided with a through-hole that penetrates in the thickness direction and has an internal thread cut, and a push-up screw is fastened to the through-hole and its tip is brought into contact with the frame part. The sticking of both is released.

しかしながら、固定ねじが締結された固定孔に設けられた雌ねじは、重量蓋上に車両などの重量物が載ったり、車両が通過した際の振動などによって固定孔の雌ねじが磨耗したり破損してしまい、蓋部にがたつきが生じてしまうという問題がある。   However, the female screw provided in the fixing hole to which the fixing screw is fastened is worn or damaged by a heavy object such as a vehicle on the weight cover, or by vibration when the vehicle passes. Therefore, there is a problem that rattling occurs in the lid.

また、枠部の内面に設けられた雌ねじが不良となると、枠部を交換しなくてはならず、高コストになると共に、工事費用も必要となってしまうという問題がある。   In addition, if the internal thread provided on the inner surface of the frame portion becomes defective, there is a problem that the frame portion has to be replaced, resulting in high costs and construction costs.

さらに、枠部と固着状態にある蓋部を持ち上げる蓋持上具（例えば、特許文献１参照）や、枠部の内部にボルト部材の回転により作動部材を回動させて、作動部材によって蓋部を押し上げる鉄蓋受枠（例えば、特許文献２参照）などが提案されているが、これら蓋持上具や鉄蓋受枠であっても上述した問題は解決することはできない。   Furthermore, a lid lifting tool for lifting the lid portion fixed to the frame portion (see, for example, Patent Document 1), or an operation member that is rotated by rotation of a bolt member inside the frame portion, An iron lid receiving frame (see, for example, Patent Document 2) that pushes up the plate has been proposed, but the above-described problems cannot be solved even with these lid holding tools and iron lid receiving frames.

実用新案登録第３０９３１１４号公報（第５〜８頁、第１〜２図）Utility Model Registration No. 3093114 (pages 5-8, FIGS. 1-2) 特開２００３−３０１４７４号公報（第３〜５頁、第３〜４図）Japanese Patent Laid-Open No. 2003-301474 (pages 3-5, FIGS. 3-4)

本発明はこのような事情に鑑み、蓋部を確実に押し上げることができると共にコストを低減した重量蓋を提供することを課題とする。   In view of such circumstances, it is an object of the present invention to provide a weight lid that can reliably push up the lid and reduce the cost.

上記課題を解決する本発明の第１の態様は、開口部を有する枠部と、該枠部の前記開口部を塞ぐ蓋部とを具備し、前記蓋部には厚さ方向に貫通すると共に雌ねじが切られた複数の貫通孔が設けられ、且つ前記枠部には前記貫通孔のそれぞれに連通すると共に雌ねじが切られた複数の固定孔が設けられており、一組の前記貫通孔及び前記固定孔は、前記貫通孔側から挿通されて少なくとも前記固定孔に締結される固定ねじによって前記蓋部と前記枠部とを固定する固定部として使用でき、且つ前記固定孔の開口を閉塞手段が塞いで、前記貫通孔に締結される押上ねじによって当該押上ねじの先端部を前記閉塞手段に当接させて前記蓋部を前記枠部に対して押し上げる押上部として使用できることを特徴とする重量蓋にある。   A first aspect of the present invention that solves the above problem includes a frame having an opening and a lid that closes the opening of the frame, and the lid penetrates in the thickness direction. A plurality of through-holes having female threads are provided, and the frame portion is provided with a plurality of fixing holes that are communicated with each of the through-holes and are female-threaded. The fixing hole can be used as a fixing part that fixes the lid part and the frame part by a fixing screw that is inserted from the through hole side and fastened to at least the fixing hole, and closes the opening of the fixing hole. The weight is characterized in that it can be used as a push-up portion that pushes the lid portion up against the frame portion by bringing the tip of the push-up screw into contact with the closing means by a push-up screw fastened to the through hole. On the lid.

かかる第１の態様では、固定部として使用した固定孔の雌ねじが磨耗又は破壊されても、押上部として使用していた固定孔に固定ねじを締結させて蓋部と枠部とを固定することができる。これにより枠部の交換が不要となり、コストを低減することができる。   In the first aspect, even if the female screw of the fixing hole used as the fixing portion is worn or destroyed, the fixing screw is fastened to the fixing hole used as the push-up portion to fix the lid portion and the frame portion. Can do. Thereby, it is not necessary to replace the frame portion, and the cost can be reduced.

本発明の第２の態様は、第１の態様において、前記貫通孔が前記連通孔の内径よりも大きな内径を有すると共に前記押上ねじが前記固定ねじよりも大径の外径を有し、且つ前記閉塞手段が、前記連通孔の開口縁部であることを特徴とする重量蓋にある。   According to a second aspect of the present invention, in the first aspect, the through hole has an inner diameter larger than an inner diameter of the communication hole, and the push-up screw has an outer diameter larger than the fixing screw, and In the weight lid, the closing means is an opening edge portion of the communication hole.

かかる第２の態様では、固定孔の開口縁部を閉塞手段とすることで、押上ねじで蓋部を確実に押し上げることができると共に、部品点数を減らしてコストを低減することができる。   In the second aspect, by using the opening edge portion of the fixing hole as the closing means, the lid portion can be reliably pushed up by the push-up screw, and the number of parts can be reduced to reduce the cost.

本発明の第３の態様は、第１又は２の態様において、前記閉塞手段が、前記連通孔に締結される閉塞ねじであることを特徴とする重量蓋にある。   According to a third aspect of the present invention, there is provided the weight cover according to the first or second aspect, wherein the closing means is a closing screw fastened to the communication hole.

かかる第３の態様では、閉塞ねじに押上ねじの先端を当接させることによって、押上ねじで蓋部を確実に押し上げることができる。   In the third aspect, by bringing the tip of the push-up screw into contact with the closing screw, the lid can be reliably pushed up by the push-up screw.

本発明の第４の態様は、第１〜３の何れかの態様において、前記閉塞手段が、前記連通孔の開口を塞ぐ板状部材であることを特徴とする重量蓋にある。   A fourth aspect of the present invention is the weight lid according to any one of the first to third aspects, wherein the closing means is a plate-like member that closes the opening of the communication hole.

かかる第４の態様では、板状部材に押上ねじの先端を当接させることによって、押上ねじで蓋部を確実に押し上げることができる。   In the fourth aspect, the lid can be reliably pushed up by the push-up screw by bringing the tip of the push-up screw into contact with the plate-like member.

本発明によれば、複数の固定孔及び貫通孔を、蓋部及び枠部の固定に使用する固定部と、蓋部を枠部に対して押し上げる押上部との両方に用いることができるため、固定部として使用していた固定孔の雌ねじが磨耗又は破壊されて蓋部にがたつきが生じたとしても、押上部として使用していた固定孔を用いて蓋部と枠部とを固定することができる。これにより、枠部を交換する必要がなく、コストを低減することができると共に蓋部を枠部に対して確実に押し上げることができる。   According to the present invention, a plurality of fixing holes and through holes can be used for both the fixing portion used for fixing the lid portion and the frame portion and the push-up portion that pushes the lid portion up against the frame portion. Even if the internal thread of the fixing hole used as the fixing part is worn or destroyed and the rattling of the lid occurs, the fixing part used as the push-up part is used to fix the lid part and the frame part. be able to. Thereby, it is not necessary to replace the frame portion, the cost can be reduced, and the lid portion can be reliably pushed up with respect to the frame portion.

以下に本発明を実施形態に基づいて詳細に説明する。   Hereinafter, the present invention will be described in detail based on embodiments.

（実施形態１）
図１は、重量蓋の平面図であり、図２は、図１のＡ−Ａ´断面図及びＢ−Ｂ´断面図である。図１に示すように、重量蓋１０は、道路などに設置される枠部２０と蓋部３０とを具備する。 (Embodiment 1)
FIG. 1 is a plan view of the weight lid, and FIG. 2 is a cross-sectional view taken along the lines AA ′ and BB ′ of FIG. As shown in FIG. 1, the weight lid 10 includes a frame portion 20 and a lid portion 30 that are installed on a road or the like.

枠部２０は、中央部に厚さ方向に貫通する開口部２１が設けられた円盤形状を有し、外周部には周方向に亘って複数、本実施形態では、周方向に亘って等間隔に４つの設置部２２が設けられている。この設置部２２が図示しないアンカーボルトなどによって道路などに固定されるようになっている。   The frame portion 20 has a disk shape in which an opening portion 21 penetrating in the thickness direction is provided in the center portion, and a plurality of outer peripheral portions are provided in the circumferential direction, and in the present embodiment, are equally spaced in the circumferential direction. Four installation portions 22 are provided. The installation portion 22 is fixed to a road or the like by an anchor bolt or the like (not shown).

また、枠部２０の開口部２１の開口縁部には、蓋部３０が載置される凹部２３が設けられている。凹部２３は、開口部２１側の縁部が表面に向かって屈曲して形成されており、この先端に蓋部３０が載置されることで、蓋部３０を支持するようになっている。また、凹部２３は、先端で支持した蓋部３０の表面が枠部２０の表面と面一となる深さで形成されている。   Further, a recessed portion 23 on which the lid portion 30 is placed is provided at the opening edge portion of the opening portion 21 of the frame portion 20. The recessed part 23 is formed by bending the edge part on the opening part 21 side toward the surface, and the lid part 30 is placed on the tip, thereby supporting the lid part 30. Further, the recess 23 is formed with a depth such that the surface of the lid portion 30 supported at the tip is flush with the surface of the frame portion 20.

蓋部３０は、枠部２０の開口部２１の内径よりも大径で、且つ凹部２３の内径よりも大径の外形の円盤形状を有する。また、図２に示すように、蓋部３０の周縁部の凹部２３に相対向する領域には、厚さ方向に貫通した複数の貫通孔３１が設けられている。本実施形態では、貫通孔３１を周方向に４つ設けるようにした。このような貫通孔３１の内面には雌ねじが切られており、詳しくは後述する固定ねじ４０及び押上ねじ５０が締結されるようになっている。なお、貫通孔３１の表面側には、貫通孔３１よりも大きな内径の大径部３２が設けられており、大径部３２によって貫通孔３１に螺合された固定ねじ４０や押上ねじ５０の頭が蓋部３０の表面から突出しないようになっている。   The lid portion 30 has a disk shape having an outer diameter larger than the inner diameter of the opening portion 21 of the frame portion 20 and larger than the inner diameter of the concave portion 23. In addition, as shown in FIG. 2, a plurality of through holes 31 penetrating in the thickness direction are provided in a region facing the concave portion 23 on the peripheral portion of the lid portion 30. In the present embodiment, four through holes 31 are provided in the circumferential direction. A female screw is cut in the inner surface of such a through hole 31, and a fixing screw 40 and a push-up screw 50, which will be described later, are fastened in detail. A large-diameter portion 32 having an inner diameter larger than that of the through-hole 31 is provided on the surface side of the through-hole 31, and the fixing screw 40 and the push-up screw 50 screwed into the through-hole 31 by the large-diameter portion 32 are provided. The head does not protrude from the surface of the lid part 30.

また、枠部２０の凹部２３には、蓋部３０の貫通孔３１に相対向する領域に貫通孔３１に連通する複数の固定孔２４が設けられている。本実施形態では、蓋部３０に貫通孔３１が４つ設けられているため、固定孔２４も貫通孔３１と同じ数、すなわち４つ設けられている。   In addition, the recessed portion 23 of the frame portion 20 is provided with a plurality of fixing holes 24 communicating with the through hole 31 in a region facing the through hole 31 of the lid portion 30. In this embodiment, since four through holes 31 are provided in the lid portion 30, the same number of fixing holes 24 as the through holes 31, that is, four are provided.

また、図２（ａ）に示すように、固定孔２４の内面には雌ねじが切られており、固定孔２４に貫通孔３１側から挿通された固定ねじ４０が締結することで、枠部２０と蓋部３０とが固定されている。すなわち、貫通孔３１側から挿通された固定ねじ４０は、基端部側が貫通孔３１に螺合し、先端部側が固定孔２４と螺合することで、枠部２０と蓋部３０とを締結している。このように複数の固定孔２４及び貫通孔３１の内、固定ねじ４０が締結されて枠部２０と蓋部３０とを固定するものを固定部と言う。本実施形態では、相対向する２つの固定孔２４及び貫通孔３１を一組の固定部として使用した。   Further, as shown in FIG. 2A, a female screw is cut on the inner surface of the fixing hole 24, and the fixing screw 40 inserted from the through hole 31 side is fastened to the fixing hole 24, whereby the frame portion 20. And the lid portion 30 are fixed. That is, the fixing screw 40 inserted from the through-hole 31 side is screwed into the through-hole 31 at the base end side and screwed into the fixing hole 24 at the tip end side, thereby fastening the frame portion 20 and the lid portion 30. is doing. Thus, what fixes the frame part 20 and the cover part 30 by fastening the fixing screw 40 among the some fixing holes 24 and the through-holes 31 is called a fixing part. In the present embodiment, the two fixing holes 24 and the through holes 31 facing each other are used as a set of fixing portions.

さらに、図２（ｂ）に示すように、固定部以外の固定孔２４に、閉塞ねじからなる閉塞手段６０を締結し、貫通孔３１に押上ねじ５０を締結させると、押上ねじ５０は固定孔２４に締結せずにその先端が閉塞手段６０に当接する。この状態からさらに押上ねじ５０を締め付けると、押上ねじ５０の先端が閉塞手段６０に当接しているため、蓋部３０を枠部２０に対して押し上げることができる。これにより枠部２０と蓋部３０との間に隙間が生じ、蓋部３０と枠部２０とが固着した状態であっても蓋部３０を枠部２０から取り外すことができる。   Further, as shown in FIG. 2B, when the closing means 60 including a closing screw is fastened to the fixing hole 24 other than the fixing portion and the push-up screw 50 is fastened to the through hole 31, the push-up screw 50 is fixed to the fixing hole. The front end thereof abuts against the closing means 60 without being fastened to 24. When the push-up screw 50 is further tightened from this state, since the tip of the push-up screw 50 is in contact with the closing means 60, the lid portion 30 can be pushed up with respect to the frame portion 20. Accordingly, a gap is generated between the frame portion 20 and the lid portion 30, and the lid portion 30 can be detached from the frame portion 20 even when the lid portion 30 and the frame portion 20 are fixed.

なお、押上ねじ５０の先端が閉塞手段６０に当接した状態では、押上ねじ５０の頭は、大径部３２内に配置されて蓋部３０の表面から突出しない状態となっている。そして、押上ねじ５０は、その頭が貫通孔３１と大径部３２との内径差によって形成された段差に当接するクリアランスだけ、蓋部３０を枠部２０に対して押し上げることができる。   In the state where the tip of the push-up screw 50 is in contact with the closing means 60, the head of the push-up screw 50 is disposed in the large diameter portion 32 and does not protrude from the surface of the lid portion 30. The push-up screw 50 can push up the lid 30 with respect to the frame 20 only by a clearance where the head abuts on a step formed by the inner diameter difference between the through hole 31 and the large diameter portion 32.

このように、複数の固定孔２４及び貫通孔３１の内、閉塞手段６０及び押上ねじ５０が設けられて、押上ねじ５０により蓋部３０を枠部２０に対して押し上げるものを押上部と言う。本実施形態では、固定部として使用した以外の２つの固定孔２４及び貫通孔３１を押上部として使用した。   As described above, the blocking means 60 and the push-up screw 50 among the plurality of fixing holes 24 and the through-holes 31 are provided, and the push-up screw 50 pushes the lid portion 30 against the frame portion 20 is called a push-up portion. In the present embodiment, the two fixing holes 24 and the through holes 31 other than those used as the fixing portions are used as the push-up portions.

また、押上部として使用した固定孔２４及び貫通孔３１は、押上ねじ５０及び閉塞手段６０を外し、固定ねじ４０を用いることで固定部として使用することができる。同様に、固定部として使用した固定孔２４及び貫通孔３１は、同様に固定ねじ４０を外し、押上ねじ５０及び閉塞手段６０を用いることで押上部として使用することができる。   The fixing hole 24 and the through hole 31 used as the push-up portion can be used as a fixing portion by removing the push-up screw 50 and the closing means 60 and using the fixing screw 40. Similarly, the fixing hole 24 and the through-hole 31 used as the fixing portion can be used as a push-up portion by similarly removing the fixing screw 40 and using the push-up screw 50 and the closing means 60.

このような構成の重量蓋１０とすることにより、重量蓋１０上に車両などの重量物が載ったり、車両が通過するときの振動などにより、固定部として使用した固定孔２４の雌ねじが磨耗又は破壊されて蓋部３０にがたつきが生じるようになっても、押上部として使用していた固定孔２４及び貫通孔３１を固定部として用いることができる。これにより、枠部２０を取り替える必要が無く、コストを低減することができる。   With the weight lid 10 having such a configuration, the internal thread of the fixing hole 24 used as the fixing portion is worn or worn by a heavy object such as a vehicle on the weight lid 10 or vibration when the vehicle passes. Even if the cover 30 is broken and becomes rattled, the fixing hole 24 and the through hole 31 used as the push-up part can be used as the fixing part. Thereby, it is not necessary to replace the frame part 20, and cost can be reduced.

なお、本実施形態では、蓋部３０の貫通孔３１と枠部２４の固定孔２４とを同じ内径とし、固定ねじ４０が貫通孔３１と固定孔２４との両方に螺合されるようにしたが、特にこれに限定されず、例えば、貫通孔３１の内径を固定孔２４よりも大きくして、固定ねじ４０が貫通孔３１に螺合されないようにしてもよい。また、固定部として使用した固定孔２４が磨耗又は破壊されたとしても、固定部として使用した貫通孔３１に押上ねじ５０を締結させることができるため、固定部として使用した固定孔２４及び貫通孔３１を押上部として使用することができ、確実に蓋部３０を枠部２０に対して押し上げることができる。   In the present embodiment, the through hole 31 of the lid portion 30 and the fixing hole 24 of the frame portion 24 have the same inner diameter, and the fixing screw 40 is screwed into both the through hole 31 and the fixing hole 24. However, the present invention is not particularly limited thereto. For example, the inner diameter of the through hole 31 may be larger than that of the fixing hole 24 so that the fixing screw 40 is not screwed into the through hole 31. Further, even if the fixing hole 24 used as the fixing portion is worn or destroyed, the push-up screw 50 can be fastened to the through-hole 31 used as the fixing portion, so that the fixing hole 24 and the through-hole used as the fixing portion can be fastened. 31 can be used as a push-up portion, and the lid portion 30 can be reliably pushed up with respect to the frame portion 20.

（実施形態２）
図３は、本発明の実施形態２に係る重量蓋の要部断面図である。なお、上述した実施形態１と同様の部材には同一の符号を付して重複する説明は省略する。 (Embodiment 2)
FIG. 3 is a cross-sectional view of a main part of the weight lid according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member similar to Embodiment 1 mentioned above, and the overlapping description is abbreviate | omitted.

図３に示すように、本実施形態の重量蓋１０Ａは、閉塞手段６０Ａとして、固定孔２４の開口を塞いで、押上ねじ５０の先端部に当接させる板状部材を用いた。   As shown in FIG. 3, the weight lid 10 </ b> A of the present embodiment uses a plate-like member that closes the opening of the fixing hole 24 and contacts the tip of the push-up screw 50 as the closing means 60 </ b> A.

この閉塞手段６０Ａは、凹部２３内に嵌合する円盤形状を有し、固定ねじ４０が締結される固定孔２４に相対向する領域には、固定ねじ４０を挿通可能な挿通孔６１が設けられている。そして、閉塞手段６０Ａを回転させることによって、挿通孔６１の位置をずらし、固定孔２４の開口を開放するか塞ぐか選択できるようになっている。   The closing means 60 </ b> A has a disk shape that fits into the recess 23, and an insertion hole 61 through which the fixing screw 40 can be inserted is provided in a region opposite to the fixing hole 24 to which the fixing screw 40 is fastened. ing. Then, by rotating the closing means 60A, the position of the insertion hole 61 is shifted so that the opening of the fixing hole 24 can be selected to be opened or closed.

このような閉塞手段６０Ａを用いた重量蓋１０Ａとしても、上述した実施形態１と同様に、重量蓋１０Ａ上に車両などの重量物が載ったり、車両が通過するときの振動などにより、固定部として使用した固定孔２４の雌ねじが磨耗又は破壊されて蓋部３０にがたつきが生じるようになっても、押上部として使用していた固定孔２４及び貫通孔３１を固定部として用いることができる。これにより、枠部２０を取り替える必要が無く、コストを低減することができる。   Even in the weight lid 10A using such a closing means 60A, the fixed portion is caused by a heavy object such as a vehicle placed on the weight lid 10A or vibration when the vehicle passes as in the first embodiment. Even if the internal thread of the fixing hole 24 used as the wearer is worn or broken and the cover part 30 becomes rattled, the fixing hole 24 and the through hole 31 used as the push-up part can be used as the fixing part. it can. Thereby, it is not necessary to replace the frame part 20, and cost can be reduced.

（実施形態３）
図４は、本発明の実施形態３に係る重量蓋の要部断面図である。なお、上述した実施形態１と同様の部材には同一の符号を付して重複する説明は省略する。 (Embodiment 3)
FIG. 4 is a cross-sectional view of a main part of a weight lid according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the member similar to Embodiment 1 mentioned above, and the overlapping description is abbreviate | omitted.

図４に示すように、重量蓋１０Ｂは、枠部２０と蓋部３０Ａとで構成されている。蓋部３０Ａの周縁部には、厚さ方向に貫通する４つの貫通孔３１Ａが設けられており、貫通孔３１Ａは、枠部２０に設けられた固定孔２４の内径よりも大径となっている。   As shown in FIG. 4, the weight lid 10 </ b> B includes a frame portion 20 and a lid portion 30 </ b> A. Four through holes 31A penetrating in the thickness direction are provided in the peripheral portion of the lid portion 30A, and the through holes 31A have a larger diameter than the inner diameter of the fixing hole 24 provided in the frame portion 20. Yes.

このような重量蓋１０Ｂの固定部では、図４（ａ）に示すように、固定ねじ４０Ａが貫通孔３１Ａに締結せずに挿通し、その先端部が固定孔２４に締結することで、枠部２０と蓋部３０Ａとを固定している。すなわち、固定ねじ４０Ａは、その頭が貫通孔３１Ａと大径部３２との内径差により形成された段差に当接し、固定ねじ４０Ａの頭と固定孔２４に締結された先端部との間で枠部２０と蓋部３０Ａとを挟持するようになっている。   In the fixing portion of the weight lid 10B, as shown in FIG. 4A, the fixing screw 40A is inserted into the through hole 31A without being fastened, and the tip end portion is fastened to the fixing hole 24. The portion 20 and the lid portion 30A are fixed. That is, the fixing screw 40 </ b> A comes into contact with the step formed by the inner diameter difference between the through hole 31 </ b> A and the large diameter portion 32, and between the head of the fixing screw 40 </ b> A and the tip portion fastened to the fixing hole 24. The frame portion 20 and the lid portion 30A are sandwiched.

また、図４（ｂ）に示すように、押上ねじ５０Ａは、貫通孔３１Ａに螺合する外径、すなわち、固定孔２４の内径よりも大径の外径を有する。そして、押上部では、貫通孔３１Ａに締結された押上ねじ５０Ａが固定孔２４の開口縁部に当接し、蓋部３０Ａを枠部２０に対して押し上げるようになっている。すなわち、本実施形態では、固定孔２４の開口を塞ぐ閉塞手段が、固定孔２４の開口縁部となるように、貫通孔３１Ａを固定孔２４よりも大きな内径とすると共に、押上ねじ５０Ａを固定孔２４の内径よりも大きな外径とするようにした。   4B, the push-up screw 50A has an outer diameter that is screwed into the through hole 31A, that is, an outer diameter that is larger than the inner diameter of the fixing hole 24. At the push-up portion, the push-up screw 50A fastened to the through hole 31A comes into contact with the opening edge portion of the fixing hole 24 and pushes the lid portion 30A against the frame portion 20. That is, in this embodiment, the through hole 31A has a larger inner diameter than the fixing hole 24 and the push-up screw 50A is fixed so that the closing means for closing the opening of the fixing hole 24 becomes the opening edge of the fixing hole 24. The outer diameter was larger than the inner diameter of the hole 24.

このような重量蓋１０Ｂであっても、重量蓋１０Ｂ上に車両などの重量物が載ったり、車両が通過するときの振動などにより、固定部として使用した固定孔２４の雌ねじが磨耗又は破壊されて蓋部３０にがたつきが生じるようになっても、押上部として使用していた固定孔２４及び貫通孔３１Ａを固定部として用いることができる。これにより、枠部２０を取り替える必要が無く、コストを低減することができる。また、固定部として使用した固定孔２４が磨耗又は破壊されたとしても、固定部として使用した貫通孔３１Ａに押上ねじ５０Ａを締結させることができるため、固定部として使用した固定孔２４及び貫通孔３１Ａを押上部として使用することができ、確実に蓋部３０Ａを枠部２０に対して押し上げることができる。   Even in such a weight lid 10B, the internal thread of the fixing hole 24 used as the fixing portion is worn or destroyed by a heavy object such as a vehicle on the weight lid 10B or vibration when the vehicle passes. Thus, even if the cover portion 30 becomes rattled, the fixing hole 24 and the through hole 31A used as the push-up portion can be used as the fixing portion. Thereby, it is not necessary to replace the frame part 20, and cost can be reduced. Further, even if the fixing hole 24 used as the fixing portion is worn or destroyed, the push-up screw 50A can be fastened to the through hole 31A used as the fixing portion. 31A can be used as a push-up portion, and the lid portion 30A can be reliably pushed up with respect to the frame portion 20.

（他の実施形態）
以上、本発明の各実施形態を説明したが、本発明の基本的構成は上述したものに限定されるものではない。例えば、上述した実施形態１〜３では、重量蓋１０〜１０Ｂに４つの固定孔２４及び貫通孔３１、３１Ａを設けるようにしたが、固定孔２４及び貫通孔３１、３１Ａの数及び位置などは特に限定されるものではない。 (Other embodiments)
As mentioned above, although each embodiment of this invention was described, the basic composition of this invention is not limited to what was mentioned above. For example, in Embodiments 1 to 3 described above, the weight lids 10 to 10B are provided with the four fixing holes 24 and the through holes 31 and 31A, but the number and positions of the fixing holes 24 and the through holes 31 and 31A are as follows. There is no particular limitation.

本発明は、マンホール等の重量蓋の製造業、設置業、保守管理業などの産業に利用することができる。   The present invention can be used for industries such as manholes and other heavy lid manufacturing, installation, and maintenance management industries.

本発明の実施形態１に係る重量蓋の平面図である。It is a top view of the weight cover which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る重量蓋の要部断面図である。It is principal part sectional drawing of the weight cover which concerns on Embodiment 1 of this invention. 本発明の実施形態２に係る重量蓋の要部断面図である。It is principal part sectional drawing of the weight cover which concerns on Embodiment 2 of this invention. 本発明の実施形態３に係る重量蓋の要部断面図である。It is principal part sectional drawing of the weight cover which concerns on Embodiment 3 of this invention.

符号の説明Explanation of symbols

１０、１０Ａ、１０Ｂ 重量蓋
２０ 枠部
２４ 固定孔
３０、３０Ａ 蓋部
３１、３１Ａ 貫通孔
４０、４０Ａ 固定ねじ
５０、５０Ａ 押上ねじ
６０、６０Ａ 閉塞手段
10, 10A, 10B Weight cover 20 Frame part 24 Fixing hole 30, 30A Cover part 31, 31A Through hole 40, 40A Fixing screw 50, 50A Push-up screw 60, 60A Closing means

Claims (4)

開口部を有する枠部と、該枠部の前記開口部を塞ぐ蓋部とを具備し、前記蓋部には厚さ方向に貫通すると共に雌ねじが切られた複数の貫通孔が設けられ、且つ前記枠部には前記貫通孔のそれぞれに連通すると共に雌ねじが切られた複数の固定孔が設けられており、一組の前記貫通孔及び前記固定孔は、前記貫通孔側から挿通されて少なくとも前記固定孔に締結される固定ねじによって前記蓋部と前記枠部とを固定する固定部として使用でき、且つ前記固定孔の開口を閉塞手段が塞いで、前記貫通孔に締結される押上ねじによって当該押上ねじの先端部を前記閉塞手段に当接させて前記蓋部を前記枠部に対して押し上げる押上部として使用できることを特徴とする重量蓋。 A frame having an opening, and a lid that closes the opening of the frame, the lid being provided with a plurality of through-holes that penetrate in the thickness direction and are internally threaded; and The frame portion is provided with a plurality of fixing holes that communicate with each of the through holes and are internally threaded, and the pair of through holes and the fixing holes are inserted from the through hole side and are at least It can be used as a fixing part for fixing the lid part and the frame part by a fixing screw fastened to the fixing hole, and a closing means closes an opening of the fixing hole, and by a push-up screw fastened to the through hole. A weight cover characterized in that it can be used as a push-up portion that pushes the lid portion against the frame portion by bringing the tip of the push-up screw into contact with the closing means. 請求項１において、前記貫通孔が前記連通孔の内径よりも大きな内径を有すると共に前記押上ねじが前記固定ねじよりも大径の外径を有し、且つ前記閉塞手段が、前記連通孔の開口縁部であることを特徴とする重量蓋。 2. The through hole according to claim 1, wherein the through hole has an inner diameter larger than an inner diameter of the communication hole, the push-up screw has an outer diameter larger than the fixing screw, and the closing means is an opening of the communication hole. A weight lid characterized by being an edge. 請求項１又は２において、前記閉塞手段が、前記連通孔に締結される閉塞ねじであることを特徴とする重量蓋。 3. The weight lid according to claim 1, wherein the closing means is a closing screw fastened to the communication hole. 請求項１〜３の何れかにおいて、前記閉塞手段が、前記連通孔の開口を塞ぐ板状部材であることを特徴とする重量蓋。
4. The weight lid according to claim 1, wherein the closing means is a plate-like member that closes the opening of the communication hole.
JP2005183890A 2005-06-23 2005-06-23 Weight lid Expired - Fee Related JP4731217B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102305087B1 (en) * 2020-07-09 2021-09-27 한국생산기술연구원 Pressure tester with improved operating performance of heavy cover, and opening and closing method for heavy cover

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Publication number Priority date Publication date Assignee Title
JPS5276161A (en) * 1975-12-20 1977-06-27 Hatsupoo Kagaku Kougiyou Kk Table board having its ends processed with plastic core
JPS5536203A (en) * 1978-09-05 1980-03-13 Asahi Chem Ind Co Ltd Catalyst for polymerization of olefin
JPS5630261A (en) * 1979-08-17 1981-03-26 Matsushita Electric Ind Co Ltd Battery and its manufacturing method
JPH035749A (en) * 1989-06-01 1991-01-11 Fuji Photo Film Co Ltd Silver halide photographic sensitive material and production thereof
JPH11166245A (en) * 1997-12-04 1999-06-22 Takeda Seisakusho:Kk Manhole frame

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5276161A (en) * 1975-12-20 1977-06-27 Hatsupoo Kagaku Kougiyou Kk Table board having its ends processed with plastic core
JPS5536203A (en) * 1978-09-05 1980-03-13 Asahi Chem Ind Co Ltd Catalyst for polymerization of olefin
JPS5630261A (en) * 1979-08-17 1981-03-26 Matsushita Electric Ind Co Ltd Battery and its manufacturing method
JPH035749A (en) * 1989-06-01 1991-01-11 Fuji Photo Film Co Ltd Silver halide photographic sensitive material and production thereof
JPH11166245A (en) * 1997-12-04 1999-06-22 Takeda Seisakusho:Kk Manhole frame

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102305087B1 (en) * 2020-07-09 2021-09-27 한국생산기술연구원 Pressure tester with improved operating performance of heavy cover, and opening and closing method for heavy cover

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