JP3238595U

JP3238595U - hand hole

Info

Publication number: JP3238595U
Application number: JP2022001897U
Authority: JP
Inventors: 翔二藏元; フックグエングエン; 享齋藤
Original assignee: ワールド工業株式会社
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-08-04
Anticipated expiration: 2032-06-08

Abstract

【課題】運搬、組み立て、及び設置のいずれにおいても作業者の負担を軽減するハンドホールを提供する。【解決手段】本考案のハンドホールは、上端が開口し、下端が閉塞する有底筒状の本体部と、前記本体部の上端の開口に蓋をする蓋部と、を備えるハンドホールであって、前記本体部が、上下方向に積み重ねられる複数の筒状片を有しており、前記筒状片は、前記上下方向から視た際に四角形となっており、前記筒状片が、鋼板によって構成される。前記筒状片は、前記上下方向から視た場合にコの字状となる第一コの字部材と、前記上下方向から視た場合にコの字状となり、前記第一コの字部材と連結される第二コの字部材と、を有する。前記第一コの字部材の端部と、前記第二コの字部材の端部を連結することにより、前記筒状片の前記四角形が構成される。【選択図】図１An object of the present invention is to provide a handhole that reduces the burden on workers during transportation, assembly, and installation. A handhole according to the present invention is a handhole comprising a bottomed cylindrical main body having an open upper end and a closed lower end, and a lid covering the opening of the upper end of the main body. The main body has a plurality of vertically stacked tubular pieces, the tubular pieces are rectangular when viewed from the vertical direction, and the tubular pieces are made of steel plates. Consists of The tubular piece includes a first U-shaped member that is U-shaped when viewed from the vertical direction, and the first U-shaped member that is U-shaped when viewed from the vertical direction. and a second U-shaped member to be connected. The rectangular shape of the tubular piece is formed by connecting the end of the first U-shaped member and the end of the second U-shaped member. [Selection diagram] Fig. 1

Description

本考案は、ハンドホールに関する。 The present invention relates to handholes.

ハンドホールは、地中において埋設された電線や通信ケーブル等の一部を収容し、それらの点検を行える内部空間を有する蓋付き箱体により構成される。蓋を開けると、内部空間が外部に開放され、作業者が内部空間で点検を行うことができる。従来、ハンドホールとして、蓋体を装着する縁塊と、地中に埋設されて地中ケーブルを収容する本体とがいずれもコンクリート成形品であって、本体上に縁塊が載置されると共にこれらが接続固定金具を介して一体化されたものが提案されている（例えば、特許文献１参照）。特許文献１のハンドホールでは、本体が複数の本体部分で構成されている。そして、複数の本体部分は、接続固定金具により連結されている。 The handhole is composed of a box with a lid that accommodates a portion of electric wires, communication cables, etc., buried underground and has an internal space for inspecting them. When the lid is opened, the internal space is opened to the outside, and an operator can perform inspection in the internal space. Conventionally, as a hand hole, both a rim block to which a lid is attached and a main body that is buried in the ground and accommodates an underground cable are concrete molded products, and the rim block is placed on the main body. A proposal has been made in which these are integrated via connection fixtures (see, for example, Patent Document 1). In the handhole of Patent Document 1, the main body is composed of a plurality of main body parts. The plurality of main body portions are connected by connection fixtures.

実用新案登録番号第３０４２６４２号公報Utility Model Registration No. 3042642

しかしながら、特許文献１のハンドホールでは、蓋体を装着する縁塊と本体がコンクリートで成形されている。このため、重量も重く、ハンドホールを構成する縁塊及び本体の運搬、組み立て、及び設置のいずれにおいても作業者の負担が大きい。 However, in the handhole of Patent Document 1, the rim mass to which the lid is attached and the main body are formed of concrete. For this reason, the weight is heavy, and the burden on the operator is heavy in all of the transportation, assembly, and installation of the rim block and the main body that constitute the handhole.

本考案は、斯かる実情に鑑み、運搬、組み立て、及び設置のいずれにおいても作業者の負担を軽減するハンドホールを提供しようとするものである。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a handhole that reduces the burden on workers during transportation, assembly, and installation.

本考案は上記課題を解決するためになされたものであり、本考案のハンドホールは、上端が開口し、下端が閉塞する有底筒状の本体部と、前記本体部の上端の開口に蓋をする蓋部と、を備えるハンドホールであって、前記本体部が、上下方向に積み重ねられる複数の筒状片を有しており、前記筒状片は、前記上下方向から視た際に四角形となっており、前記筒状片が、鋼板によって構成されることを特徴とする。 The present invention has been made to solve the above-mentioned problems. and a cover portion for carrying out the above-described operation, wherein the main body portion has a plurality of vertically stacked cylindrical pieces, and the cylindrical pieces are rectangular when viewed from the vertical direction. and the tubular piece is made of a steel plate.

本考案のハンドホールにおいて、前記筒状片は、塩ビ鋼板よって構成されることを特徴とする。 The handhole of the present invention is characterized in that the tubular piece is made of a PVC steel plate.

本考案のハンドホールにおいて、前記筒状片は、前記上下方向の周壁を構成する周壁部と、前記周壁部の上端を起点として前記筒状片の内側方向に縮径する支持部と、前記周壁部の下端を起点として前記筒状片の内側方向に縮径する当接部と、を有し、前記筒状片の前記支持部は、上側に積み重ねられる他の前記筒状片の前記当接部を受け止めるように構成され、前記筒状片を前記上下方向から視た場合の前記四角形の角部近傍において、前記支持部及び前記当接部には、内縁から角部の凸端に向かう切り込みとなる欠損部が形成され、前記欠損部の先端は、前記四角形の角部の凸端から内側に離反していることを特徴とする。 In the handhole of the present invention, the tubular piece includes a peripheral wall portion forming the peripheral wall in the vertical direction, a support portion whose diameter decreases inwardly of the tubular piece starting from the upper end of the peripheral wall portion, and the peripheral wall. an abutting portion whose diameter decreases toward the inner side of the tubular piece starting from the lower end of the tubular piece, and the supporting portion of the tubular piece is provided for the abutment of the other tubular piece stacked on the upper side. In the vicinity of the corners of the quadrangle when the cylindrical piece is viewed from the vertical direction, the support part and the contact part have notches extending from the inner edge to the convex end of the corner. is formed, and the tip of the missing portion is separated inward from the convex end of the corner of the square.

本考案のハンドホールにおいて、前記支持部及び前記当接部における前記欠損部の先端近傍は、前記鋼板の基本厚よりも肉厚となる肉厚領域となることを特徴とする。 The handhole of the present invention is characterized in that the vicinity of the tip of the missing portion in the support portion and the contact portion forms a thick region that is thicker than the basic thickness of the steel plate.

本考案のハンドホールにおいて、前記支持部及び前記当接部は、前記欠損部を自身の上下端に有する前記鋼板の上下端近傍領域を前記筒状片の内側方向に折り曲げて構成され、前記鋼板の上下端面は、前記筒状片の全周において前記筒状片の内部側に位置することを特徴とする。 In the handhole of the present invention, the support portion and the contact portion are formed by bending regions near the upper and lower ends of the steel plate having the cutout portions at the upper and lower ends thereof toward the inner side of the cylindrical piece. The upper and lower end surfaces of are located inside the tubular piece over the entire circumference of the tubular piece.

本考案のハンドホールにおいて、前記筒状片は、前記鋼板の左右端面が前記筒状片の内部側に位置するように前記筒状片の内側方向に折り曲げて構成されることを特徴とする。 In the handhole of the present invention, the tubular piece is formed by bending the tubular piece inward such that the left and right end surfaces of the steel plate are positioned inside the tubular piece.

本考案のハンドホールは、前記上下方向において隣接する前記筒状片の連結部分を前記筒状片の外部側から前記筒状片の全周においてシールするシール部を備えることを特徴とする。 The handhole of the present invention is characterized by comprising a seal portion that seals the connecting portion of the vertically adjacent tubular pieces from the outside of the tubular piece along the entire circumference of the tubular piece.

本考案のハンドホールにおいて、前記筒状片は、前記上下方向から視た場合にコの字状となる第一コの字部材と、前記上下方向から視た場合にコの字状となり、前記第一コの字部材と連結される第二コの字部材と、を有することを特徴とする。 In the handhole of the present invention, the tubular piece includes a first U-shaped member that is U-shaped when viewed from above and below, and a U-shaped member that is U-shaped when viewed from above and below. and a second U-shaped member connected to the first U-shaped member.

本考案のハンドホールにおいて、前記第一コの字部材及び前記第二コの字部材は、コの字の中央辺を構成する中央辺部と、前記中央辺部の一端に連続し、前記中央辺部から折り曲がる一方の辺に相当する短辺部と、前記中央辺部の他端に連続し、前記中央辺部から折り曲がる他方の辺に相当し、且つ前記短辺部よりも長さが長い長辺部と、を有することを特徴とする。 In the handhole of the present invention, the first U-shaped member and the second U-shaped member comprise a central side portion forming a central side of the U-shaped member, and one end of the central side portion continuing to the central side. A short side portion corresponding to one side bent from the side portion, and a short side portion continuing to the other end of the central side portion, corresponding to the other side bent from the central side portion, and longer than the short side portion. and a long side.

本考案のハンドホールにおいて、前記第一コの字部材の前記短辺部の端部と、前記第二コの字部材の前記長辺部の端部を連結すると共に、前記第一コの字部材の前記長辺部の端部と、前記第二コの字部材の前記短辺部の端部を連結することにより、前記筒状片の前記四角形が構成されることを特徴とする。 In the handhole of the present invention, the end of the short side of the first U-shaped member and the end of the long side of the second U-shaped member are connected, and The rectangular shape of the tubular piece is formed by connecting the end of the long side of the member and the end of the short side of the second U-shaped member.

本考案のハンドホールにおいて、前記第一コの字部材と前記第二コの字部材の連結部分をシールするシール部を備えることを特徴とする。 The handhole of the present invention is characterized by comprising a sealing portion for sealing a connection portion between the first U-shaped member and the second U-shaped member.

本考案のハンドホールにおいて、前記長辺部は、前記短辺部の２倍以上の長さを有することを特徴とする。 The handhole of the present invention is characterized in that the long side has a length that is at least twice the length of the short side.

本考案のハンドホールにおいて、前記本体部は、前記上下方向において隣接する前記筒状片同士を連結する連結機構を有し、前記筒状片は、前記上下方向の周壁を構成する周壁部を有し、前記連結機構は、下方側の前記筒状片（以下、下方側筒状片と呼ぶ。）における前記周壁部の上端を起点として前記下方側筒状片の内部側に縮径する支持部と、上方側の前記筒状片（以下、上方側筒状片と呼ぶ。）における前記周壁部の下端を起点として前記上方側筒状片の内部側に縮径し、前記下方側筒状片に前記上方側筒状片を載置した際、前記支持部に当接するように構成される当接部と、前記下方側筒状片に前記上方側筒状片を載置した状態で相互に当接する前記支持部と前記当接部を連結させる連結部材と、を有することを特徴とする。 In the handhole of the present invention, the main body has a connecting mechanism that connects the vertically adjacent tubular pieces, and the tubular piece has a peripheral wall portion that constitutes the vertical peripheral wall. The connecting mechanism is a supporting portion that starts from the upper end of the peripheral wall portion of the lower tubular piece (hereinafter referred to as the lower tubular piece) and has a diameter that decreases toward the inside of the lower tubular piece. Then, starting from the lower end of the peripheral wall portion of the upper cylindrical piece (hereinafter referred to as the upper cylindrical piece), the diameter is reduced toward the inside of the upper cylindrical piece, and the lower cylindrical piece a contact portion configured to contact the support portion when the upper cylindrical piece is placed on the upper cylindrical piece; It is characterized by having a connection member that connects the support portion and the contact portion that are in contact with each other.

本考案のハンドホールにおいて、前記本体部は、前記下方側筒状片に前記上方側筒状片を載置した際、前記下方側筒状片の前記周壁部の外周面と前記上方側筒状片の前記周壁部の外周面が同一平面となるように前記下方側筒状片に対する前記上方側筒状片の水平方向の位置決めをする位置決め機構を有することを特徴とする。 In the handhole of the present invention, when the upper tubular piece is placed on the lower tubular piece, the main body portion is arranged so that the outer peripheral surface of the peripheral wall portion of the lower tubular piece and the upper tubular piece are in contact with each other. A positioning mechanism is provided for horizontally positioning the upper tubular piece with respect to the lower tubular piece so that the outer peripheral surfaces of the peripheral wall portions of the pieces are flush with each other.

本考案のハンドホールにおいて、前記位置決め機構は、前記下方側筒状片における前記支持部の内縁を起点として上方向に立設される立設部を有しており、前記上方側筒状片における前記当接部の内縁が、前記下方側筒状片の前記立設部の外周面と前記水平方向に係合されることを特徴とする。 In the handhole of the present invention, the positioning mechanism has an upright portion that is erected upward from the inner edge of the support portion of the lower tubular piece. An inner edge of the contact portion is engaged with an outer peripheral surface of the standing portion of the lower cylindrical piece in the horizontal direction.

本考案のハンドホールにおいて、前記本体部は、最下端において前記本体部の周壁の外周面よりも外側に拡径する拡径部を有し、前記拡径部は、鉛直下方側に向かう土圧を受けて、地中に埋設された前記本体部の地上側への移動を制限することを特徴とする。 In the handhole of the present invention, the main body has an enlarged diameter portion that expands outward from the outer peripheral surface of the peripheral wall of the main body at the lowermost end, and the enlarged diameter portion receives earth pressure directed downward in the vertical direction. It is characterized by restricting the movement of the main body buried in the ground to the ground side.

本考案のハンドホールによれば、運搬、組み立て、及び設置のいずれにおいても作業者の負担を軽減することができる。 According to the handhole of the present invention, it is possible to reduce the burden on workers during transportation, assembly, and installation.

（Ａ）は、本考案の実施形態におけるハンドホールの斜視図である。（Ｂ）は、本考案の実施形態におけるハンドホールの本体部の下端部近傍の様子を示す正面図である。(A) is a perspective view of a handhole in an embodiment of the present invention; (B) is a front view showing the vicinity of the lower end of the main body of the handhole according to the embodiment of the present invention; （Ａ）は、本考案の実施形態における第一コの字部材及び第二コの字部材の平面図である。（Ｂ）は、本考案の実施形態における第一コの字部材及び第二コの字部材の斜視図である。(A) is a plan view of a first U-shaped member and a second U-shaped member in an embodiment of the present invention. (B) is a perspective view of a first U-shaped member and a second U-shaped member in the embodiment of the present invention; （Ａ）は、本考案の実施形態における第一コの字部材又は第二コの字部材を斜め上方側から見た斜視図である。（Ｂ）は、本考案の実施形態におけるハンドホールの筒状片の第一コの字部材又は第二コの字部材を斜め下方側から見た斜視図である。(A) is a perspective view of a first U-shaped member or a second U-shaped member according to an embodiment of the present invention, as viewed obliquely from above. (B) is a perspective view of the first U-shaped member or the second U-shaped member of the tubular piece of the handhole in the embodiment of the present invention, as viewed obliquely from below. 本考案の実施形態における第一コの字部材又は第二コの字部材の折れ曲がり領域及びその近傍の拡大斜視図である。It is an enlarged perspective view of the bending area|region of the 1st U-shaped member or the 2nd U-shaped member in embodiment of this invention, and its vicinity. （Ａ）本考案の実施形態におけるハンドホールの第一コの字部材又は第二コの字部材の材料となる鋼板の平面図である。（Ｂ）は、（Ａ）の鋼板の一部を折り曲げた際の側面図である。（Ｃ）は、（Ｂ）の欠損部近傍の拡大図である。（Ｄ）は、鋼板を欠損部で折り曲げた様子を示す拡大図である。(A) is a plan view of a steel plate as a material for the first U-shaped member or the second U-shaped member of the handhole in the embodiment of the present invention; (B) is a side view when part of the steel plate of (A) is bent. (C) is an enlarged view of the vicinity of the missing portion in (B). (D) is an enlarged view showing a state in which the steel plate is bent at the missing portion. （Ａ）は、本考案の実施形態における第一コの字部材と第二コの字部材を連結してなる筒状片の平面図である。（Ｂ）は、本考案の実施形態における第一コの字部材と第二コの字部材を連結してなる筒状片の斜視図である。(A) is a plan view of a cylindrical piece formed by connecting a first U-shaped member and a second U-shaped member in an embodiment of the present invention. (B) is a perspective view of a cylindrical piece formed by connecting a first U-shaped member and a second U-shaped member in the embodiment of the present invention. （Ａ）は、第一コの字部材と第二コの字部材の連結位置を辺の中央に位置させた筒状片の第一の辺が撓む様子を表す平面図である。（Ｂ）は、本考案の実施形態における第一コの字部材と第二コの字部材を連結してなる筒状片の第一の辺が撓む様子を表す平面図である。(A) is a plan view showing how a first side of a tubular piece with a connecting position of a first U-shaped member and a second U-shaped member positioned at the center of the side bends. (B) is a plan view showing how the first side of the tubular piece formed by connecting the first U-shaped member and the second U-shaped member in the embodiment of the present invention bends. 本考案の実施形態における筒状片側連結機構を説明するための上方側筒状片と下方側筒状片の斜視図である。FIG. 4 is a perspective view of an upper tubular piece and a lower tubular piece for explaining the tubular piece-side coupling mechanism according to the embodiment of the present invention; （Ａ）は、本考案の実施形態における上方側筒状片の底面図である。（Ｂ）は、本考案の実施形態における下方側筒状片の平面図である。(A) is a bottom view of the upper tubular piece in the embodiment of the present invention. (B) is a plan view of the lower tubular piece in the embodiment of the present invention; 本考案の実施形態における上方側筒状片を下方側筒状片に載置する過程を説明するための上方側筒状片及び下方側筒状片の断面図である。FIG. 5 is a cross-sectional view of the upper tubular piece and the lower tubular piece for explaining the process of placing the upper tubular piece on the lower tubular piece in the embodiment of the present invention;

以下、本考案の実施の形態を、添付図面を参照して説明する。図１～図１０は考案を実施する形態の一例であって、図中、図１と同一の符号を付した部分は同一物を表す。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIGS. 1 to 10 show an example of a mode for carrying out the invention, and in the figures, the same reference numerals as in FIG. 1 denote the same parts.

＜全体構成＞
図１を参照して、本考案の実施形態におけるハンドホール１について説明する。本実施形態におけるハンドホール１は、地中に埋められた電線ケーブル、通信ケーブル等のメンテナンスを行うことを目的の一つとして地中に埋められるものであり、図１に示すように、開口２Ｄを有する本体部２と、本体部２の開口２Ｄに蓋をする蓋部３と、を備える。 <Overall composition>
A handhole 1 according to an embodiment of the present invention will be described with reference to FIG. The handhole 1 in this embodiment is buried in the ground for one of the purposes of performing maintenance of electric cables, communication cables, etc. buried in the ground, and as shown in FIG. and a lid portion 3 that covers the opening 2D of the body portion 2.

＜本体部＞
図１を参照して、本体部２について説明する。本体部２は、図１（Ａ）に示すように、筒状に構成され、一端に開口２Ｄを有し、他端が閉塞する。本実施形態における本体部２は、筒状部２０と、上面プレート２１と、底面プレート２３と、を有する。 <Body part>
The body portion 2 will be described with reference to FIG. As shown in FIG. 1A, the body portion 2 is configured in a tubular shape, has an opening 2D at one end, and is closed at the other end. The body portion 2 in this embodiment has a tubular portion 20 , a top plate 21 and a bottom plate 23 .

図１（Ａ）に示すように、筒状部２０は、本体部２の周壁２Ａを構成する。本実施形態において筒状部２０は、軸直交断面が略正方形となるように構成されたものとして説明するが、これに限定されるものではなく、長方形等の四角形、その他の多角形形状、円形状、楕円形状等となるように構成されてもよく、そのようなものも本考案の範囲に含まれる。なお、軸直交断面とは、本体部２（筒状部２０）の中心軸２Ｃに直交する断面を指す。 As shown in FIG. 1A, the tubular portion 20 forms a peripheral wall 2A of the body portion 2. As shown in FIG. In the present embodiment, the cylindrical portion 20 will be described as having a substantially square cross-section orthogonal to the axis, but the present invention is not limited to this, and may include a quadrilateral such as a rectangle, other polygonal shapes, and a circular shape. It may also be configured to have a shape, elliptical shape, etc., and such are within the scope of the present invention. The axis-perpendicular cross-section refers to a cross-section perpendicular to the central axis 2C of the body portion 2 (cylindrical portion 20).

図１（Ａ）に示すように、上面プレート２１は、自身の中央領域に蓋部３と係合するよう構成された筒状の蓋係合部２１Ａを有する。蓋係合部２１Ａの開口は、開口２Ｄに相当する。筒状部２０の内部空間は、蓋係合部２１Ａの開口を通じて外部と連通する。上面プレート２１は、蓋部３と協働して筒状部２０の上方側開口を閉じる。 As shown in FIG. 1A, the top plate 21 has a cylindrical lid engaging portion 21A configured to engage with the lid portion 3 in its central region. The opening of the lid engaging portion 21A corresponds to the opening 2D. The internal space of the cylindrical portion 20 communicates with the outside through the opening of the lid engaging portion 21A. The top plate 21 cooperates with the lid portion 3 to close the upper opening of the cylindrical portion 20 .

図１（Ａ）に示すように、底面プレート２３は、筒状部２０の軸方向Ａの下方側の下方側開口に取り付けられ、下方側開口を閉じる。そして、図１（Ｂ）に示すように、底面プレート２３は、本体部２の周壁２Ａ（筒状部２０の周壁部２３０）の外周面２Ｅよりも外側に拡径する拡径部２３Ｃを有する。拡径部２３Ｃは、軸方向Ａに直交する方向に拡径する部分を有することが好ましい。ハンドホール１が地中Ｇに埋設されると、拡径部２３Ｃは、鉛直下方側（軸方向Ａの上方側から下方側）に向かう土圧Ｐを受ける。このため、拡径部２３Ｃは、地中に埋設されたハンドホール１（本体部２）が地上側へ移動することを制限することができる。 As shown in FIG. 1A, the bottom plate 23 is attached to a lower opening on the lower side in the axial direction A of the tubular portion 20 to close the lower opening. Then, as shown in FIG. 1B, the bottom plate 23 has an enlarged diameter portion 23C whose diameter is enlarged outside the outer peripheral surface 2E of the peripheral wall 2A of the body portion 2 (the peripheral wall portion 230 of the cylindrical portion 20). . It is preferable that the enlarged diameter portion 23C has a portion whose diameter is enlarged in a direction perpendicular to the axial direction A. As shown in FIG. When the handhole 1 is buried in the ground G, the expanded diameter portion 23C receives an earth pressure P directed vertically downward (from the upper side to the lower side in the axial direction A). Therefore, the expanded diameter portion 23C can restrict the movement of the hand hole 1 (main body portion 2) buried in the ground to the ground side.

＜筒状部＞
図１を参照して、筒状部２０について説明する。本実施形態において筒状部２０は、図１（Ａ）に示すように、５つの筒状片２２（２２Ａ～２２Ｅ）を有する。５つの筒状片２２は、軸直交断面が略正方形の四角筒状に構成され、筒状片２２の軸方向Ａの両端が開口する。そして、５つの筒状片２２の中心軸が同軸となるように５つの筒状片２２が積層されて筒状部２０となる。 <Cylindrical part>
The tubular portion 20 will be described with reference to FIG. In this embodiment, the cylindrical portion 20 has five cylindrical pieces 22 (22A to 22E), as shown in FIG. 1(A). The five tubular pieces 22 are configured in a square tubular shape having a substantially square cross section orthogonal to the axis, and both ends of the tubular piece 22 in the axial direction A are open. The cylindrical portion 20 is formed by stacking the five cylindrical pieces 22 such that the central axes of the five cylindrical pieces 22 are coaxial.

５つの筒状片２２のうち、最上段の筒状片２２Ａは、四角筒の各辺に対応する４つの周壁部２３０（本体部２の周壁２Ａに相当、以下同様。）が筒状片２２Ａの軸方向Ａの上方側から下方側に進むに従って軸直角方向の外側に離反するように傾斜して、断面が正方形の角錐台筒状に構成される。また、５つの筒状片２２のうち、筒状片２２Ａに続く残りの４つの筒状片２２Ｂ～２２Ｅは、四角筒の各辺に対応する４つの周壁部２３０がそれぞれ筒状片２２Ｂ～２２Ｅの軸方向Ａに平行に延在し、断面が正方形の角筒状に構成される。なお、筒状片２２Ｂ～２２Ｄは、軸方向Ａにおける軸方向長さが同一であるが、筒状片２２Ｅは、筒状片２２Ｂ～２２Ｄよりも軸方向Ａにおける軸方向長さが短い。なお、筒状片２２Ａ～２２Ｅの軸方向Ａは、本体部２や筒状部２０の軸方向に平行であり、以下において単に軸方向Ａと呼ぶこととする。 Of the five cylindrical pieces 22, the uppermost cylindrical piece 22A has four peripheral wall portions 230 (corresponding to the peripheral wall 2A of the main body portion 2, the same applies hereinafter) corresponding to each side of the rectangular tube. It is configured in a truncated pyramidal tubular shape with a square cross section so as to be inclined away from the outer side in the direction perpendicular to the axis as it progresses from the upper side to the lower side in the axial direction A of . Further, among the five cylindrical pieces 22, the remaining four cylindrical pieces 22B to 22E following the cylindrical piece 22A have four peripheral wall portions 230 corresponding to each side of the rectangular cylinder. It extends in parallel with the axial direction A of and is configured in a rectangular tubular shape with a square cross section. The tubular pieces 22B to 22D have the same axial length in the axial direction A, but the tubular piece 22E has a shorter axial length in the axial direction A than the tubular pieces 22B to 22D. Note that the axial direction A of the tubular pieces 22A to 22E is parallel to the axial directions of the body portion 2 and the tubular portion 20, and is hereinafter simply referred to as the axial direction A.

なお、本実施形態における筒状片２２の数は一例であって、筒状片２２は一つであってもよい。筒状片２２を積層する数を変更することにより筒状部２０の高さを変更することができる。 Note that the number of tubular pieces 22 in the present embodiment is an example, and the number of tubular pieces 22 may be one. By changing the number of laminated tubular pieces 22, the height of the tubular portion 20 can be changed.

＜第一コの字部材及び第二コの字部材＞
図２～図５を参照して、第一コの字部材２４及び第二コの字部材２５について説明する。筒状片２２は、図２（Ａ），（Ｂ）に示すように、コの字状に２箇所で折り曲がる第一コの字部材２４及び第二コの字部材２５を有する。第一コの字部材２４及び第二コの字部材２５のそれぞれは、例えば、金属や樹脂等の材料で構成されることが好ましい。 <First U-shaped member and second U-shaped member>
The first U-shaped member 24 and the second U-shaped member 25 will be described with reference to FIGS. As shown in FIGS. 2A and 2B, the tubular piece 22 has a first U-shaped member 24 and a second U-shaped member 25 that are bent at two points in a U-shape. Each of the first U-shaped member 24 and the second U-shaped member 25 is preferably made of a material such as metal or resin, for example.

第一コの字部材２４及び第二コの字部材２５のそれぞれは、中央辺部２００と、短辺部２１０と、長辺部２２０と、を有する。中央辺部２００は、コの字の中央辺を構成する。短辺部２１０は、中央辺部２００の一端に連続し、中央辺部２００から折り曲がるコの字の一方の辺に相当する。長辺部２２０は、中央辺部２００の他端に連続し、中央辺部２００から折り曲がるコの字の他方の辺に相当し、且つ短辺部２１０よりも長さが長い。 Each of the first U-shaped member 24 and the second U-shaped member 25 has a central side portion 200 , a short side portion 210 and a long side portion 220 . The central side portion 200 constitutes the central side of the U-shape. The short side portion 210 is continuous with one end of the central side portion 200 and corresponds to one side of the U-shape bent from the central side portion 200 . The long side portion 220 is continuous with the other end of the central side portion 200 , corresponds to the other side of the U-shape bent from the central side portion 200 , and is longer than the short side portion 210 .

また、図３（Ａ），（Ｂ）に示すように、第一コの字部材２４及び第二コの字部材２５のそれぞれは、中央辺部２００、短辺部２１０、及び長辺部２２０のそれぞれに、周壁部２３０と、支持部２３１と、当接部２３２と、立設部２３３、を有する。 3A and 3B, each of the first U-shaped member 24 and the second U-shaped member 25 has a central side portion 200, a short side portion 210, and a long side portion 220. has a peripheral wall portion 230 , a support portion 231 , a contact portion 232 and a standing portion 233 .

周壁部２３０は、本体部２の中心軸周りの周壁２Ａの一部（図１参照）を成すものである。本実施形態において周壁部２３０は、長方形状の板状体により構成される。 The peripheral wall portion 230 constitutes a part of the peripheral wall 2A (see FIG. 1) around the central axis of the body portion 2. As shown in FIG. In this embodiment, the peripheral wall portion 230 is configured by a rectangular plate-like body.

支持部２３１は、図３（Ａ）及び図４に示すように、軸方向Ａにおける周壁部２３０の上端部（軸方向上端部）を起点として中央辺部２００、短辺部２１０、及び長辺部２２０で取り囲まれる空間側に延在する。本実施形態において支持部２３１は、周壁部２３０の上端部において周壁部２３０に連続しつつ、周壁部２３０の長さ方向に沿って延びると共に、周壁部２３０に対して直交する帯状の板状体として構成される。 As shown in FIGS. 3A and 4, the support portion 231 has a center side portion 200, a short side portion 210, and a long side portion starting from the upper end portion (axial upper end portion) of the peripheral wall portion 230 in the axial direction A. It extends to the side of the space surrounded by the portion 220 . In the present embodiment, the support portion 231 is a strip-like plate-like body that extends along the length direction of the peripheral wall portion 230 while being continuous with the peripheral wall portion 230 at the upper end portion of the peripheral wall portion 230 and orthogonal to the peripheral wall portion 230. configured as

当接部２３２は、図３（Ｂ）に示すように、軸方向Ａにおける周壁部２３０の下端部（軸方向下端部）を起点として中央辺部２００、短辺部２１０、及び長辺部２２０で取り囲まれる空間側に延在する。本実施形態において当接部２３２は、周壁部２３０の下端部において周壁部２３０に連続しつつ、周壁部２３０の長さ方向に沿って延びると共に、周壁部２３０に対して直交する帯状の板状体として構成される。 As shown in FIG. 3(B), the contact portion 232 has a center side portion 200, a short side portion 210, and a long side portion 220 starting from the lower end portion (axial lower end portion) of the peripheral wall portion 230 in the axial direction A. extends into the space surrounded by In the present embodiment, the contact portion 232 extends along the length direction of the peripheral wall portion 230 while being continuous with the peripheral wall portion 230 at the lower end portion of the peripheral wall portion 230. constructed as a body.

立設部２３３は、図３（Ａ）及び図４に示すように、支持部２３１を起点として軸方向Ａの上方側（周壁部２３０から離れる側）に立設する。本実施形態において立設部２３３は、中央辺部２００、短辺部２１０、及び長辺部２２０で取り囲まれる空間側に延在する方向における支持部２３１の端部を起点として支持部２３１に対して直交する方向（軸方向Ａ）に延在する。本実施形態において立設部２３３は、支持部２３１の幅方向端部において支持部２３１に連続しつつ、支持部２３１の長さ方向に沿って延びると共に、支持部２３１に対して直交する帯状の板状体として構成される。 As shown in FIGS. 3A and 4 , the erected portion 233 is erected upward in the axial direction A (away from the peripheral wall portion 230 ) with the support portion 231 as a starting point. In the present embodiment, the erected portion 233 extends toward the support portion 231 from the end portion of the support portion 231 in the direction extending toward the space surrounded by the central side portion 200 , the short side portion 210 , and the long side portion 220 . extending in a direction (axial direction A) perpendicular to the In the present embodiment, the erected portion 233 extends along the length direction of the support portion 231 while being continuous with the support portion 231 at the end portion in the width direction of the support portion 231. It is configured as a plate-like body.

なお、支持部２３１と、当接部２３２は、軸方向Ａにおいて隣接する筒状片２２同士を連結する筒状片側連結機構の一部を構成するものであり、その点については後述する。また、立設部２３３は、位置決め機構の一部を構成するものであり、その点については後述する。 Note that the support portion 231 and the contact portion 232 constitute a part of a cylindrical one-side connecting mechanism that connects the cylindrical pieces 22 adjacent in the axial direction A, and this point will be described later. Also, the erected portion 233 constitutes a part of the positioning mechanism, and this point will be described later.

また、支持部２３１及び当接部２３２のそれぞれは、図２、図３（Ａ），（Ｂ）及び図４に示すように、欠損部２３４を有する。欠損部２３４は、第一コの字部材２４及び第二コの字部材２５を上下方向から視た場合の角部２３５近傍において、支持部２３１及び当接部２３２の内縁２３６から角部２３５の凸端２３７に向かう切り込みである。本実施形態において欠損部２３４は、くさび状に切り欠いて設けられるが、これに限定されるものではなく、その他の形状であってもよい。 Each of the support portion 231 and the contact portion 232 has a missing portion 234 as shown in FIGS. The missing portion 234 extends from the inner edge 236 of the support portion 231 and the contact portion 232 to the corner portion 235 in the vicinity of the corner portion 235 when the first U-shaped member 24 and the second U-shaped member 25 are viewed from above and below. It is a notch towards the convex edge 237 . In the present embodiment, the cutout portion 234 is cut out in a wedge shape, but the cutout portion 234 is not limited to this and may have other shapes.

なお、第一コの字部材２４及び第二コの字部材２５における角部２３５は、中央辺部２００と短辺部２１０の境界部分と、中央辺部２００と長辺部２２０の境界部分と、後述する第一連結片２６０と短辺部２１０の境界部分と、後述する第一連結片２６０（第二連結片２６１）と短辺部２１０の境界部分と、第一連結片２６０（第二連結片２６１）と長辺部２２０の境界部分が該当する。また、筒状片２２では、角部２３５は、筒状片２２の四角形の角部に相当する。 In addition, the corner portions 235 of the first U-shaped member 24 and the second U-shaped member 25 are the boundary portion between the central side portion 200 and the short side portion 210 and the boundary portion between the central side portion 200 and the long side portion 220. , the boundary portion between the first connecting piece 260 and the short side portion 210, which will be described later, the boundary portion between the first connecting piece 260 (second connecting piece 261) and the short side portion 210, and the first connecting piece 260 (second The boundary portion between the connecting piece 261) and the long side portion 220 corresponds to this. Further, in the tubular piece 22 , the corners 235 correspond to square corners of the tubular piece 22 .

欠損部２３４の先端２３４Ａは、図４に示すように、角部２３５の凸端２３７から内側に離反している。欠損部２３４の先端２３４Ａを含む欠損部２３４の先端近傍領域２３８は、自身に連続する周囲領域２３９（支持部２３１の一部領域）よりも肉厚となるように構成される。つまり、周囲領域２３９における厚みを基本厚と定義した場合、欠損部２３４の先端近傍領域２３８は、基本厚よりも肉厚となる肉厚領域となる。 A tip 234A of the cutout portion 234 is separated inward from the convex end 237 of the corner portion 235, as shown in FIG. A region 238 near the tip of the cutout portion 234 including the tip 234A of the cutout portion 234 is configured to be thicker than a peripheral region 239 (a partial region of the support portion 231) that is continuous with itself. In other words, when the thickness of the peripheral region 239 is defined as the basic thickness, the region 238 near the tip of the missing portion 234 is a thick region that is thicker than the basic thickness.

欠損部２３４の先端近傍領域２３８は、以上のように肉厚に構成されるので、筒状片２２全体の剛性が向上する。また、欠損部２３４の先端近傍領域２３８は、周囲領域２３９よりも盛り上がっているので、欠損部２３４の周囲から欠損部２３４に向かう水の流れを抑制することができる。結果、筒状片２２は、欠損部２３４を通じた内部への水の侵入を抑制することができる。なお、以上の構造は支持部２３１の欠損部２３４のみならず、当接部２３２の欠損部２３４に適用されてもよい。 Since the region 238 near the distal end of the missing portion 234 is configured to be thick as described above, the rigidity of the cylindrical piece 22 as a whole is improved. In addition, since the region 238 near the tip of the cutout portion 234 is raised more than the surrounding region 239, the flow of water from the circumference of the cutout portion 234 toward the cutout portion 234 can be suppressed. As a result, the tubular piece 22 can prevent water from entering the interior through the cutout portion 234 . Note that the above structure may be applied not only to the missing portion 234 of the support portion 231 but also to the missing portion 234 of the contact portion 232 .

＜第一コの字部材、及び第二コの字部材の製造方法＞
第一コの字部材２４及び第二コの字部材２５のそれぞれは、例えば、図５（Ａ）に示すように、欠損部２３４，２４０が予め設けられた一枚の長方形状の鋼板３００を、鋼板３００の幅方向Ｗに延びる仮想折り曲げ線３０１，３０２でコの字状に折り曲げることにより設けられる。このため、鋼板３００は、鋼板３００の幅方向Ｗに延びる仮想折り曲げ線３０１，３０２を境界として中央辺部２００に対応する区間、短辺部２１０に対応する区間、長辺部２２０に対応する区間の３区間に分けられる。なお、図５（Ａ）～（Ｄ）では、支持部２３１のネジ孔２３１Ｃ、及び当接部２３２のネジ孔２３２Ｂは省略して描かれている。 <Method for manufacturing the first U-shaped member and the second U-shaped member>
Each of the first U-shaped member 24 and the second U-shaped member 25, for example, as shown in FIG. , are provided by bending the steel plate 300 in a U-shape along imaginary bending lines 301 and 302 extending in the width direction W of the steel plate 300 . Therefore, the steel plate 300 has a section corresponding to the central side portion 200, a section corresponding to the short side portion 210, and a section corresponding to the long side portion 220 with virtual bending lines 301 and 302 extending in the width direction W of the steel plate 300 as boundaries. is divided into three sections. 5A to 5D, the screw hole 231C of the support portion 231 and the screw hole 232B of the contact portion 232 are omitted.

また、鋼板３００は、鋼板３００の長さ方向Ｌの一端近傍に鋼板３００の幅方向Ｗに延びる仮想折り曲げ線３０３を有し、鋼板３００の長さ方向Ｌの他端近傍に鋼板３００の幅方向Ｗに延びる仮想折り曲げ線３０４を有する。なお、鋼板３００の長さ方向Ｌは、鋼板３００の幅方向Ｗに直交する方向であり、鋼板３００の長手方向である。また、鋼板３００は、鋼板３００の幅方向Ｗの一端近傍に鋼板３００の長さ方向Ｌに延びる仮想折り曲げ線３０５，３０６を有し、鋼板３００の幅方向Ｗの他端近傍に鋼板３００の長さ方向Ｌに延びる仮想折り曲げ線３０７を有する。なお、仮想折り曲げ線３０５，３０７は、欠損部２３４の先端よりも鋼板３００の幅方向Ｗの内側に位置する。 Further, the steel plate 300 has an imaginary bending line 303 extending in the width direction W of the steel plate 300 near one end in the length direction L of the steel plate 300 , and near the other end in the length direction L of the steel plate 300 , the width direction of the steel plate 300 . It has an imaginary fold line 304 extending to W. Note that the length direction L of the steel plate 300 is a direction perpendicular to the width direction W of the steel plate 300 and is the longitudinal direction of the steel plate 300 . Further, the steel plate 300 has imaginary bending lines 305 and 306 extending in the length direction L of the steel plate 300 near one end in the width direction W of the steel plate 300 , and near the other end in the width direction W of the steel plate 300 . It has an imaginary fold line 307 extending in the longitudinal direction L. Note that the imaginary bending lines 305 and 307 are located inside the width direction W of the steel plate 300 from the tip of the missing portion 234 .

欠損部２３４は、仮想折り曲げ線３０１～３０４の両端に一対設けられる。そして、一対の欠損部２３４は、鋼板３００の幅方向Ｗの両端部を起点として幅方向Ｗの内側に向かってくさび状に切り欠いて設けられる。なお、欠損部２３４は、仮想折り曲げ線３０１，３０２で鋼板３００をコの字状に折り曲げると共に、仮想折り曲げ線３０３，３０４で鋼板３００の端部領域を中央辺部２００、短辺部２１０、及び長辺部２２０で取り囲まれる空間側に折り曲げた際、隣接する支持部２３１同士及び当接部２３２同士が干渉することを避けるために設けられるものであり、その目的を達成できるならその他の形状であってもよい。また、欠損部２４０は、鋼板３００の角に４つ設けられる。欠損部２４０は、仮想折り曲げ線３０５，３０７まで延びる。 A pair of missing portions 234 are provided at both ends of the imaginary bending lines 301-304. The pair of cutout portions 234 are cut out in a wedge shape toward the inside in the width direction W starting from both end portions in the width direction W of the steel plate 300 . Note that the cutout portion 234 is formed by bending the steel plate 300 into a U-shape along the imaginary bending lines 301 and 302, and dividing the end regions of the steel plate 300 along the imaginary bending lines 303 and 304 into the central side portion 200, the short side portion 210, and the short side portion 210. It is provided to avoid interference between adjacent support portions 231 and contact portions 232 when folded toward the space surrounded by the long side portion 220. If the purpose can be achieved, other shapes may be used. There may be. Moreover, four missing portions 240 are provided at the corners of the steel plate 300 . Defect 240 extends to imaginary fold lines 305 and 307 .

仮想折り曲げ線３０３，３０４で鋼板３００を、中央辺部２００、短辺部２１０、及び長辺部２２０で取り囲まれる空間側に９０度折り曲げるとその帯状領域が後述する第一連結片２６０又は第二連結片２６１となる。仮想折り曲げ線３０５で鋼板３００を、中央辺部２００、短辺部２１０、及び長辺部２２０で取り囲まれる空間側に９０度折り曲げるとその帯状領域が支持部２３１となる。仮想折り曲げ線３０６で鋼板３００を周壁部２３０から離れる側に９０度折り曲げるとその帯状領域が立設部２３３となる。仮想折り曲げ線３０７で鋼板３００を支持部２３１と同じ側に９０度折り曲げるとその帯状領域が当接部２３２となる。なお、支持部２３１に相当する帯状領域と当接部２３２に相当する帯状領域の領域幅は同じであることが好ましい。 When the steel plate 300 is bent 90 degrees along the imaginary bending lines 303 and 304 toward the space surrounded by the central side 200, the short side 210, and the long side 220, the belt-like region is formed into a first connecting piece 260 or a second connecting piece 260 described later. It becomes the connecting piece 261 . When the steel plate 300 is bent 90 degrees along the imaginary bending line 305 toward the space surrounded by the central side 200 , the short side 210 and the long side 220 , the belt-like region becomes the supporting portion 231 . When the steel plate 300 is bent 90 degrees along the imaginary bending line 306 toward the side away from the peripheral wall portion 230 , the band-like region becomes the standing portion 233 . When the steel plate 300 is bent 90 degrees to the same side as the support portion 231 along the imaginary bending line 307 , the band-like region becomes the contact portion 232 . In addition, it is preferable that the band-shaped region corresponding to the support portion 231 and the band-shaped region corresponding to the contact portion 232 have the same width.

図５（Ｂ）に示すように、仮想折り曲げ線３０５～３０７で鋼板３００を上記のように折り曲げて、支持部２３１、当接部２３２、及び立設部２３３を設けた後に、仮想折り曲げ線３０１～３０４で鋼板３００を上記説明したように折り曲げることにより、第一コの字部材２４及び第二コの字部材２５が設けられる。 As shown in FIG. 5B, the steel plate 300 is bent along the imaginary bending lines 305 to 307 as described above to provide the supporting portion 231, the contact portion 232, and the standing portion 233. The first U-shaped member 24 and the second U-shaped member 25 are provided by bending the steel plate 300 at 304 as described above.

ちなみに、図５（Ｃ），（Ｄ）に示すように、仮想折り曲げ線３０１～３０４で鋼板３００を折り曲げると、鋼板３００の欠損部２３４と反対側の凸端２３７となる予定の領域Ｒは、引き伸ばされ、鋼板３００の欠損部２３４の先端２３４Ａの近傍領域Ｑ（欠損部２３４の先端近傍領域２３８）は、潰される。結果、鋼板３００の欠損部２３４の先端２３４Ａの近傍領域Ｑには、周囲の材料が寄せられて近傍領域Ｑの周囲領域と比べて肉厚となる。つまり、鋼板３００の厚みを基本厚と定義した場合、近傍領域Ｑは、基本厚よりも肉厚となる肉厚領域となる。 Incidentally, as shown in FIGS. 5(C) and 5(D), when the steel plate 300 is bent along the imaginary bending lines 301 to 304, the region R that is expected to become the convex end 237 on the opposite side of the missing portion 234 of the steel plate 300 is By being stretched, the region Q near the tip 234A of the missing portion 234 of the steel plate 300 (region 238 near the tip of the missing portion 234) is crushed. As a result, the region Q near the tip 234A of the cutout portion 234 of the steel plate 300 is thicker than the surrounding region of the region Q because the surrounding material is gathered. That is, when the thickness of the steel plate 300 is defined as the basic thickness, the neighboring area Q is a thick area that is thicker than the basic thickness.

鋼板３００は、塩ビ鋼板であってもよい。ちなみに、塩ビ鋼板とは、可塑剤などを含有するポリ塩化ビニル樹脂を鋼板に積層した物である。また、鋼板３００は、鉄鋼以外の金属で構成されてもよい。 The steel plate 300 may be a PVC steel plate. By the way, a polyvinyl chloride steel plate is a steel plate laminated with a polyvinyl chloride resin containing a plasticizer and the like. Also, the steel plate 300 may be made of a metal other than steel.

なお、以上は鋼板３００に対して折り曲げ加工を行って第一コの字部材２４及び第二コの字部材２５を設ける例を説明したが、これに限定されるものではなく、各部を別部材として連結するような態様であってもよい。 In the above, an example in which the steel plate 300 is subjected to bending to form the first U-shaped member 24 and the second U-shaped member 25 has been described. It may be a mode of connecting as.

＜第一コの字部材、及び第二コの字部材による筒状片の組み立て＞
図６（Ａ），（Ｂ）に示すように、第一コの字部材２４の短辺部２１０の端部と第二コの字部材２５の長辺部２２０の端部を連結すると共に、第一コの字部材２４の長辺部２２０の端部と第二コの字部材２５の短辺部２１０の端部を連結することにより筒状片２２となる。この際、第一コの字部材２４及第二コの字部材２５のそれぞれの中央辺部２００は、略正方形の一方の一組の対辺（以下、一方一組対辺と呼ぶ。）となる。また、連結された第一コの字部材２４の短辺部２１０と第二コの字部材２５の長辺部２２０で筒状片２２における略正方形の第一の辺２７０を成し、連結された第一コの字部材２４の長辺部２２０と第二コの字部材２５の短辺部２１０で略正方形の第二の辺２７１を成す。そして、第一の辺と第二の辺は、略正方形の他方一組の対辺（以下、他方一組対辺と呼ぶ。）となる。 <Assembly of tubular piece by first U-shaped member and second U-shaped member>
As shown in FIGS. 6A and 6B, the ends of the short sides 210 of the first U-shaped member 24 and the ends of the long sides 220 of the second U-shaped member 25 are connected, The cylindrical piece 22 is formed by connecting the end of the long side 220 of the first U-shaped member 24 and the end of the short side 210 of the second U-shaped member 25 . At this time, the central side portions 200 of each of the first U-shaped member 24 and the second U-shaped member 25 form one pair of opposite sides of a substantially square (hereinafter referred to as one pair of opposite sides). In addition, the short side portion 210 of the first U-shaped member 24 and the long side portion 220 of the second U-shaped member 25 that are connected form a substantially square first side 270 in the cylindrical piece 22, and are connected. The long side 220 of the first U-shaped member 24 and the short side 210 of the second U-shaped member 25 form a substantially square second side 271 . The first side and the second side form the other pair of opposite sides of the substantially square (hereinafter referred to as the other pair of opposite sides).

第一コの字部材２４の短辺部２１０の端部と第二コの字部材２５の長辺部２２０の端部の連結部分（以下、第一連結部分と呼ぶ。）２８０は、図６（Ａ），（Ｂ）に示すように、略正方形の第一の辺２７０の中央よりも一方側にずれた位置に位置する。同様に、第一コの字部材２４の長辺部２２０の端部と第二コの字部材２５の短辺部２１０の端部の連結部分（以下、第二連結部分と呼ぶ。）２８１は、図６（Ａ），（Ｂ）に示すように、略正方形の第一の辺２７０の中央よりも一方側にずれた位置に位置する。 A connection portion (hereinafter referred to as a first connection portion) 280 between the end of the short side portion 210 of the first U-shaped member 24 and the end of the long side portion 220 of the second U-shaped member 25 is shown in FIG. As shown in (A) and (B), it is located at a position shifted to one side from the center of the substantially square first side 270 . Similarly, a connection portion (hereinafter referred to as a second connection portion) 281 between the end of the long side portion 220 of the first U-shaped member 24 and the end portion of the short side portion 210 of the second U-shaped member 25 is a connection portion 281 . , as shown in FIGS. 6(A) and 6(B), the first side 270 of the substantially square is located at a position shifted to one side from the center.

一般的に、ハンドホール１を地中に埋設すると、外側から周壁２Ａ（周壁部２３０）の外周面に土圧がかかり、周壁２Ａ（周壁部２３０）がハンドホール１の内部側に押圧される。もし、第一連結部分２８０が第一の辺２７０の中央に位置する場合、図７（Ａ）に示すように、第一連結部分２８０の変位Ｅ１が最大となるように第一の辺２７０が撓む。結果、第一連結部分２８０が変形して隙間が生じる可能性がある。一方、本実施形態における筒状片２２のように、第一連結部分２８０が第一の辺２７０の中央よりもずれた位置にあると、図７（Ｂ）に示すように、第一の辺２７０の中央の変位Ｅ２が最大となり、第一連結部分２８０の変位は変位Ｅ２よりも小さくなる。結果、第一連結部分２８０の変形の度合いは抑えられ、第一連結部分２８０に隙間が生じる可能性が低くなる。第一の辺２７０における第一連結部分２８０の位置を中央からずらせばずらすほど第一連結部分２８０の変位は抑えられ、第一連結部分２８０に隙間が生じる可能性をゼロに近づけることができる。 In general, when the handhole 1 is buried in the ground, earth pressure is applied from the outside to the outer peripheral surface of the peripheral wall 2A (surrounding wall portion 230), and the peripheral wall 2A (surrounding wall portion 230) is pressed toward the inside of the handhole 1. . If the first connecting portion 280 is positioned in the center of the first side 270, as shown in FIG. bend. As a result, the first connecting portion 280 may deform and create a gap. On the other hand, if the first connecting portion 280 is at a position shifted from the center of the first side 270 as in the case of the tubular piece 22 in this embodiment, as shown in FIG. The displacement E2 at the center of 270 is maximum, and the displacement of the first connecting portion 280 is smaller than the displacement E2. As a result, the degree of deformation of the first connecting portion 280 is suppressed, and the possibility of creating a gap in the first connecting portion 280 is reduced. The further the position of the first connecting portion 280 on the first side 270 is shifted from the center, the more the displacement of the first connecting portion 280 is suppressed, and the possibility of creating a gap in the first connecting portion 280 can be brought closer to zero.

以上の理由から、第二コの字部材２５の長辺部２２０の長さは、第一コの字部材２４の短辺部２１０の長さの２倍以上であることが好ましく、３倍以上であることがより好ましい。なるべく、第一の辺２７０における第一連結部分２８０の位置を中央からずらすためである。以上のことは、第二連結部分２８１についても同様に適用することができる。 For the above reasons, the length of the long side portion 220 of the second U-shaped member 25 is preferably at least twice the length of the short side portion 210 of the first U-shaped member 24, and at least three times. is more preferable. This is because the position of the first connecting portion 280 on the first side 270 is shifted from the center as much as possible. The above can be similarly applied to the second connecting portion 281 as well.

また、以上のように構成された筒状片２２は、一方一組対辺及び他方一組対辺のそれぞれの辺に支持部２３１、当接部２３２及び立設部２３３が設けられる。この際、支持部２３１は、筒状片２２の周壁部２３０の軸方向上端部を起点として筒状片２２の内部側に縮径（延在）するように構成される。また、当接部２３２は、筒状片２２の周壁部２３０の軸方向下端部を起点として筒状片２２の内部側に縮径（延在）するように構成される。以上のように構成された支持部２３１は、上側に積み重ねられる別の筒状片２２の当接部２３２を受け止めるように構成される。なお、支持部２３１、当接部２３２及び立設部２３３は、全ての辺に設けられなくてもよく、そのようなものも本考案の範囲に含まれる。 Further, the cylindrical piece 22 configured as described above is provided with a support portion 231, a contact portion 232 and a standing portion 233 on each of one pair of opposite sides and the other pair of opposite sides. At this time, the support portion 231 is configured to decrease in diameter (extend) toward the inner side of the tubular piece 22 from the axial upper end portion of the peripheral wall portion 230 of the tubular piece 22 . Further, the contact portion 232 is configured to decrease in diameter (extend) toward the inner side of the tubular piece 22 from the axial lower end portion of the peripheral wall portion 230 of the tubular piece 22 . The support portion 231 configured as described above is configured to receive the contact portion 232 of another cylindrical piece 22 stacked on the upper side. Note that the supporting portion 231, the contact portion 232, and the standing portion 233 may not be provided on all sides, and such a structure is also included in the scope of the present invention.

また、以上のように構成された筒状片２２では、支持部２３１、当接部２３２、及び立設部２３３がいずれも筒状片２２の内部側に位置する。筒状片２２を構成する第一コの字部材２４及び第二コの字部材２５が鋼板３００で構成される場合、鋼板３００の上下端面（幅方向Ｗの両端面）は、筒状片２２の内部に位置する。また、以下の＜コの字部材側連結機構＞で説明するように、鋼板３００の左右端面（長さ方向Ｌの両端面：第一連結片２６０及び第二連結片２６１の端面）も筒状片２２の内部に位置する。一般的に、鋼板３００は端面が錆びやすくなっているが、本実施形態のように、筒状片２２の内部に端面を位置させることにより、端面が錆びる要因を低減させることができる。 Further, in the tubular piece 22 configured as described above, the supporting portion 231 , the contact portion 232 , and the standing portion 233 are all positioned inside the tubular piece 22 . When the first U-shaped member 24 and the second U-shaped member 25 constituting the tubular piece 22 are made of the steel plate 300, the upper and lower end surfaces (both end surfaces in the width direction W) of the steel plate 300 located inside the Further, as described in <U-shaped member side connection mechanism> below, the left and right end surfaces of the steel plate 300 (both end surfaces in the length direction L: end surfaces of the first connecting piece 260 and the second connecting piece 261) are also cylindrical. Located inside piece 22 . In general, the steel plate 300 is prone to rusting at the end face, but by locating the end face inside the tubular piece 22 as in the present embodiment, it is possible to reduce the factors causing the end face to rust.

＜コの字部材側連結機構＞
図２を参照して、コの字部材側連結機構について説明する。筒状片２２は、第一コの字部材２４の短辺部２１０の端部と第二コの字部材２５の長辺部２２０の端部を連結するコの字部材側連結機構を有する。図２（Ａ），（Ｂ）に示すように、コの字部材側連結機構は、第一コの字部材２４の短辺部２１０の端部（長辺部２２０の端部）に設けられる第一連結片２６０と、第二コの字部材２５の長辺部２２０（短辺部２１０の端部）の端部に設けられる第二連結片２６１と、コの字部材側連結部材（図示省略）と、を有する。 <U-shaped member side connection mechanism>
The U-shaped member side coupling mechanism will be described with reference to FIG. The cylindrical piece 22 has a U-shaped member side connecting mechanism that connects the end of the short side portion 210 of the first U-shaped member 24 and the end of the long side portion 220 of the second U-shaped member 25 . As shown in FIGS. 2A and 2B, the U-shaped member side coupling mechanism is provided at the end of the short side portion 210 (the end of the long side portion 220) of the first U-shaped member 24. A first connecting piece 260, a second connecting piece 261 provided at the end of the long side 220 (end of the short side 210) of the second U-shaped member 25, and a U-shaped member side connecting member (illustrated omitted) and

第一連結片２６０は、第一コの字部材２４の短辺部２１０の端部（長辺部２２０の端部）を起点として中央辺部２００、短辺部２１０、及び長辺部２２０で取り囲まれる空間側に延在する。本実施形態において第一連結片２６０は、第一コの字部材２４の短辺部２１０（長辺部２２０）に対して直交する方向に延在する板状体により構成される。 The first connecting piece 260 extends from the end of the short side 210 (the end of the long side 220) of the first U-shaped member 24 to the central side 200, the short side 210, and the long side 220. Extends into the enclosed space. In the present embodiment, the first connecting piece 260 is configured by a plate-like body extending in a direction orthogonal to the short side portion 210 (long side portion 220) of the first U-shaped member 24. As shown in FIG.

第二連結片２６１は、第二コの字部材２５の長辺部２２０の端部（短辺部２１０の端部）を起点として中央辺部２００、短辺部２１０、及び長辺部２２０で取り囲まれる空間側に延在する。第二連結片２６１は、第二コの字部材２５の長辺部２２０（短辺部２１０）に対して直交する方向に延在する板状体により構成される。 The second connecting piece 261 extends from the end of the long side 220 of the second U-shaped member 25 (the end of the short side 210) to the central side 200, the short side 210, and the long side 220. Extends into the enclosed space. The second connecting piece 261 is formed of a plate-like body extending in a direction orthogonal to the long side portion 220 (short side portion 210) of the second U-shaped member 25. As shown in FIG.

コの字部材側連結部材は、第一連結片２６０と第二連結片２６１を連結するものである。コの字部材側連結部材は、例えば、ネジ、ボルト及びナット等が挙げられるが、これに限定されるものではなく、第一連結片２６０と第二連結片２６１を連結可能なその他の全てのものが含まれる。 The U-shaped member side connecting member connects the first connecting piece 260 and the second connecting piece 261 . Examples of the U-shaped member-side connecting member include, but are not limited to, screws, bolts, nuts, and the like. includes things.

コの字部材側連結部材が、ネジ又はボルトを有する場合、図２（Ｂ）に示すように、第一連結片２６０には、少なくとも１つのネジ孔２６０Ａが設けられ、第二連結片２６１には、少なくとも１つのネジ孔２６１Ａが設けられる。 When the U-shaped member side connecting member has a screw or bolt, as shown in FIG. 2B, the first connecting piece 260 is provided with at least one screw hole 260A, is provided with at least one screw hole 261A.

第一コの字部材２４の短辺部２１０の端部（長辺部２２０の端部）と第二コの字部材２５の長辺部２２０の端部（短辺部２１０の端部）を連結する際、ネジ孔２６０Ａとネジ孔２６１Ａが一致するように、第一連結片２６０としての板状体と第二連結片２６１としての板状体を重ね合わせて当接させる。そして、ネジ孔２６０Ａとネジ孔２６１Ａにネジ又はボルト等を通して第一連結片２６０と第二連結片２６１を連結する。 The end of the short side 210 of the first U-shaped member 24 (the end of the long side 220) and the end of the long side 220 of the second U-shaped member 25 (the end of the short side 210) When connecting, the plate-like body as the first connecting piece 260 and the plate-like body as the second connecting piece 261 are overlapped and brought into contact so that the screw holes 260A and the screw holes 261A are aligned. Then, the first connecting piece 260 and the second connecting piece 261 are connected by passing screws or bolts through the screw holes 260A and 261A.

＜筒状片側連結機構＞
図８及に図９を参照して筒状片側連結機構について説明する。筒状部２０は、軸方向Ａにおいて隣接する筒状片２２同士を連結する筒状片側連結機構を有する。筒状片側連結機構は、図８に示すように、軸方向Ａにおいて隣接する下方側の筒状片（以下、下方側筒状片と呼ぶ。）２２Ｃに設けられる支持部２３１と、軸方向Ａにおいて下方側筒状片２２Ｃに隣接する上方側の筒状片（以下、上方側筒状片と呼ぶ。）２２Ｂに設けられる当接部２３２と、筒状片側連結部材（図示省略）と、を有する。なお、上方側筒状片２２Ｂは、例えば、図１（Ａ）の筒状片２２Ｂに対応し、下方側筒状片２２Ｃは、例えば、図１（Ａ）の筒状片２２Ｃに対応するので、同じ符号を付している。 <Cylindrical one-side connecting mechanism>
The cylindrical one-side connecting mechanism will be described with reference to FIGS. 8 and 9. FIG. The cylindrical portion 20 has a cylindrical one-side connecting mechanism that connects the cylindrical pieces 22 adjacent in the axial direction A. As shown in FIG. As shown in FIG. 8, the tubular one-side coupling mechanism includes a support portion 231 provided on a lower tubular piece (hereinafter referred to as a lower tubular piece) 22C adjacent in the axial direction A, A contact portion 232 provided on an upper tubular piece (hereinafter referred to as an upper tubular piece) 22B adjacent to a lower tubular piece 22C, and a tubular one-side connecting member (not shown). have. The upper tubular piece 22B corresponds to, for example, the tubular piece 22B in FIG. 1A, and the lower tubular piece 22C corresponds to, for example, the tubular piece 22C in FIG. 1A. , are given the same reference numerals.

下方側筒状片２２Ｃの一方一組対辺及び他方一組対辺のいずれかに設けられる支持部２３１を支持片２３１Ａと定義し、各支持片２３１Ａの集まりを支持部２３１と定義した場合、図８及び図９（Ｂ）に示すように、本実施形態では、下方側筒状片２２Ｃの一方一組対辺及び他方一組対辺の全ての辺に帯状の支持片２３１Ａが設けられる。また、上方側筒状片２２Ｂの一方一組対辺及び他方一組対辺のいずれかの辺に設けられる立設部２３３を立設片２３３Ａと定義し、各立設片２３３Ａの集まりを立設部２３３と定義した場合、図９（Ｂ）に示すように、本実施形態では、上方側筒状片２２Ｂの一方一組対辺及び他方一組対辺の全ての辺に立設片２３３Ａが設けられる。また、上方側筒状片２２Ｂの一方一組対辺及び他方一組対辺のいずれかの辺に設けられる当接部２３２を当接片２３２Ａと定義し、各当接片２３２Ａの集まりを当接部２３２と定義した場合、図９（Ａ）に示すように、本実施形態では、上方側筒状片２２Ｂの一方一組対辺及び他方一組対辺の全ての辺に帯状の当接片２３２Ａが設けられる。 When the support portions 231 provided on either one pair of opposite sides or the other pair of opposite sides of the lower cylindrical piece 22C are defined as the support pieces 231A, and the group of the support pieces 231A is defined as the support portion 231, FIG. And as shown in FIG. 9B, in this embodiment, belt-shaped support pieces 231A are provided on all sides of one pair of opposite sides and the other pair of opposite sides of the lower cylindrical piece 22C. In addition, the erected portions 233 provided on either side of one pair of opposite sides of the upper cylindrical piece 22B and the other pair of opposite sides are defined as an erected piece 233A, and a group of the respective erected pieces 233A is defined as an erected portion. When defined as 233, as shown in FIG. 9B, in this embodiment, standing pieces 233A are provided on all sides of one pair of opposite sides and the other pair of opposite sides of the upper cylindrical piece 22B. Further, the abutting portions 232 provided on either side of one pair of opposite sides of the upper cylindrical piece 22B and the other pair of opposite sides are defined as abutting pieces 232A, and a group of the respective abutting pieces 232A are defined as abutting portions. 232, as shown in FIG. 9A, in this embodiment, strip-shaped contact pieces 232A are provided on all sides of one pair of opposite sides and the other pair of opposite sides of the upper cylindrical piece 22B. be done.

筒状片側連結部材は、支持部２３１（支持片２３１Ａ）と当接部２３２（当接片２３２Ａ）を連結するものである。筒状片側連結部材は、例えば、ネジ、ボルト及びナット等が挙げられるが、これに限定されるものではなく、支持部２３１（支持片２３１Ａ）と当接部２３２（当接片２３２Ａ）を連結可能なその他の全てのものが含まれる。 The cylindrical one-side connecting member connects the support portion 231 (support piece 231A) and the contact portion 232 (contact piece 232A). Examples of the cylindrical one-side connecting member include, but are not limited to, screws, bolts, nuts, and the like, and connect the support portion 231 (support piece 231A) and the contact portion 232 (contact piece 232A). All others possible are included.

筒状片側連結部材が、ネジ又はボルトを有する場合、支持部２３１（支持片２３１Ａ）及び当接部２３２（当接片２３２Ａ）には、それぞれ複数のネジ孔２３１Ｃ，２３２Ｂが設けられる。そして、上方側筒状片２２Ｂを下方側筒状片２２Ｃに連結する場合、図８に示すように、上方側筒状片２２Ｂの各当接片２３２Ａ（当接部２３２）の下側面が、下方側筒状片２２Ｃの対応する各支持片２３１Ａ（支持部２３１）の上側面に当接すると共に、互いのネジ孔が一致するように上方側筒状片２２Ｂを下方側筒状片２２Ｃに載置する。この状態で、一致させたネジ孔にネジ又はボルト等を通して各支持片２３１Ａ（支持部２３１）と各当接片２３２Ａ（当接部２３２）を筒状片側連結部材で連結すれば、上方側筒状片２２Ｂを下方側筒状片２２Ｃに連結することができる。 When the cylindrical one-side connecting member has screws or bolts, the support portion 231 (support piece 231A) and the contact portion 232 (contact piece 232A) are provided with a plurality of screw holes 231C and 232B, respectively. When connecting the upper tubular piece 22B to the lower tubular piece 22C, as shown in FIG. The upper tubular piece 22B is placed on the lower tubular piece 22C so that it abuts on the upper surface of each corresponding support piece 231A (support portion 231) of the lower tubular piece 22C, and the screw holes are aligned with each other. place. In this state, if screws or bolts or the like are passed through the aligned screw holes to connect each supporting piece 231A (supporting portion 231) and each contacting piece 232A (contacting portion 232) with a cylindrical one-side connecting member, the upper side cylinder The shaped piece 22B can be connected to the lower tubular piece 22C.

＜位置決め機構＞
図８～図１０を参照して位置決め機構について説明する。上方側筒状片２２Ｂを下方側筒状片２２Ｃに連結する際、図８に示す上方側筒状片２２Ｂの周壁部２３０の外周面２３０Ａと、下方側筒状片２２Ｃの周壁部２３０の外周面２３０Ａが同一平面となるように、上方側筒状片２２Ｂと下方側筒状片２２Ｃの水平方向の位置決めが容易に行えることが好ましい。このため、筒状部２０は、位置決め機構を有する。なお、周壁部２３０の外周面２３０Ａは、本体部２の周壁２Ａの外周面２Ｅに相当する。位置決め機構は、図１０に示すように、下方側筒状片２２Ｃに設けられる支持部２３１（支持片２３１Ａ）と、上方側筒状片２２Ｂに設けられる当接部２３２（当接片２３２Ａ）と、下方側筒状片２２Ｃの支持部２３１に設けられる立設部２３３（立設片２３３Ａ）と、を有する。 <Positioning mechanism>
The positioning mechanism will be described with reference to FIGS. 8 to 10. FIG. When connecting the upper tubular piece 22B to the lower tubular piece 22C, the outer peripheral surface 230A of the peripheral wall portion 230 of the upper tubular piece 22B and the outer periphery of the peripheral wall portion 230 of the lower tubular piece 22C shown in FIG. It is preferable that horizontal positioning of the upper tubular piece 22B and the lower tubular piece 22C can be easily performed so that the surfaces 230A are flush with each other. Therefore, the tubular portion 20 has a positioning mechanism. Note that the outer peripheral surface 230A of the peripheral wall portion 230 corresponds to the outer peripheral surface 2E of the peripheral wall 2A of the main body portion 2 . As shown in FIG. 10, the positioning mechanism includes a support portion 231 (support piece 231A) provided on the lower tubular piece 22C, and a contact portion 232 (contact piece 232A) provided on the upper tubular piece 22B. , and an upright portion 233 (upright piece 233A) provided on the support portion 231 of the lower cylindrical piece 22C.

本実施形態では、上記説明したように、上方側筒状片２２Ｂの全ての辺に当接片２３２Ａが設けられ、下方側筒状片２２Ｃの全ての辺に支持片２３１Ａ及び立設片２３３Ａが設けれる（図９参照）。そして、図１０に示すように、立設片２３３Ａは、支持片２３１Ａの内縁を起点として上方向に立設される。本実施形態において立設片２３３Ａは、帯状の支持片２３１Ａの幅方向の内縁（最内端）を起点として９０度折れ曲がって起立する板状板として構成される。また、図９（Ａ），（Ｂ）及び図１０に示すように、上方側筒状片２２Ｂの帯状の当接片２３２Ａの縮径方向における帯幅をＳ、下方側筒状片２２Ｃの帯状の支持片２３１Ａの縮径方向における帯幅をＴと定義した場合、本実施形態では、Ｓ＝Ｔである。 In this embodiment, as described above, the contact pieces 232A are provided on all sides of the upper tubular piece 22B, and the support pieces 231A and the standing pieces 233A are provided on all sides of the lower tubular piece 22C. provided (see FIG. 9). Then, as shown in FIG. 10, the standing piece 233A is erected upward with the inner edge of the supporting piece 231A as a starting point. In the present embodiment, the standing piece 233A is configured as a plate-like plate that is bent 90 degrees with the widthwise inner edge (innermost end) of the belt-like support piece 231A as a starting point. Further, as shown in FIGS. 9A, 9B and 10, the band width of the band-shaped contact piece 232A of the upper cylindrical piece 22B in the direction of diameter reduction is S, and the band-like shape of the lower cylindrical piece 22C is S. When the width of the supporting piece 231A in the direction of diameter reduction is defined as T, S=T in this embodiment.

以上のように構成される上方側筒状片２２Ｂを下方側筒状片２２Ｃに載置する際、上方側筒状片２２Ｂの４辺の各当接片２３２Ａの内縁（最内面）２３２Ｂを下方側筒状片２２Ｃの４辺の各立設片２３３Ａの外縁（最外面）２３３Ｂに係合（当接）させつつ、下方側筒状片２２Ｃに対して上方側筒状片２２Ｂを接近させると、各立設片２３３Ａにより上方側筒状片２２Ｂの各当接片２３２Ａが下方側筒状片２２Ｃの４辺の各支持片２３１Ａに案内される。立設片２３３Ａの外縁（最外面）２３３Ｂは、水平方向に位置決めしつつ、上方側筒状片２２Ｂの各当接片２３２Ａを下方側筒状片２２Ｃの各支持片２３１Ａに案内する案内面として機能する。 When placing the upper tubular piece 22B configured as described above on the lower tubular piece 22C, the inner edges (innermost surfaces) 232B of the contact pieces 232A on the four sides of the upper tubular piece 22B are placed downward. When the upper tubular piece 22B is brought closer to the lower tubular piece 22C while engaging (abutting) the outer edge (outermost surface) 233B of each standing piece 233A on the four sides of the side tubular piece 22C, , the contact pieces 232A of the upper tubular piece 22B are guided to the support pieces 231A on the four sides of the lower tubular piece 22C by the standing pieces 233A. An outer edge (outermost surface) 233B of the standing piece 233A serves as a guide surface that guides the contact pieces 232A of the upper tubular piece 22B to the support pieces 231A of the lower tubular piece 22C while positioning them in the horizontal direction. Function.

この状態で、上方側筒状片２２Ｂの４辺の各当接片２３２Ａの下端面２３２Ｃが下方側筒状片２２Ｃの４辺の各支持片２３１Ａの上端面２３１Ｂに当接すると、上方側筒状片２２Ｂの各当接片２３２Ａと下方側筒状片２２Ｃの各支持片２３１Ａは一致するように重ね合わさる。結果、上方側筒状片２２Ｂの周壁部２３０の外周面２３０Ａと、下方側筒状片２２Ｃの周壁部２３０の外周面２３０Ａが同一平面となる。以上のようにして、上方側筒状片２２Ｂと下方側筒状片２２Ｃは位置決め機構により水平方向に位置決めされる。 In this state, when the lower end surfaces 232C of the contact pieces 232A on the four sides of the upper tubular piece 22B contact the upper end surfaces 231B of the support pieces 231A on the four sides of the lower tubular piece 22C, Each contact piece 232A of the cylindrical piece 22B and each support piece 231A of the lower cylindrical piece 22C are overlapped so as to match each other. As a result, the outer peripheral surface 230A of the peripheral wall portion 230 of the upper tubular piece 22B and the outer peripheral surface 230A of the peripheral wall portion 230 of the lower tubular piece 22C are flush with each other. As described above, the upper tubular piece 22B and the lower tubular piece 22C are horizontally positioned by the positioning mechanism.

また、以上のようにして、下方側筒状片２２Ｃに上方側筒状片２２Ｂを積み重ねて固定した後に、下方側筒状片２２Ｃと上方側筒状片２２Ｂの連結部分（境界部分）２Ｆ（図１参照）を、シール部（図示省略）により下方側筒状片２２Ｃ及び上方側筒状片２２Ｂの外部側から筒状片２２Ｂ，２２Ｃの全周においてシールしてもよい。更に、第一コの字部材２４と第二コの字部材２５の第一連結部分２８０、第二連結部分２８１をシール部（図示省略）により下方側筒状片２２Ｃ及び上方側筒状片２２Ｂの外部側からシールしてもよい。こうすれば、外部からハンドホール１に水分が侵入することを防止することができる。 Further, after the upper tubular piece 22B is stacked and fixed on the lower tubular piece 22C as described above, the connection portion (boundary portion) 2F (boundary portion) between the lower tubular piece 22C and the upper tubular piece 22B ( 1) may be sealed from the outer sides of the lower tubular piece 22C and the upper tubular piece 22B by sealing portions (not shown) around the entire circumferences of the tubular pieces 22B and 22C. Furthermore, the first connecting portion 280 and the second connecting portion 281 of the first U-shaped member 24 and the second U-shaped member 25 are sealed by sealing portions (not shown) to separate the lower tubular piece 22C and the upper tubular piece 22B. may be sealed from the outside of the By doing so, it is possible to prevent moisture from entering the handhole 1 from the outside.

以上において、筒状片２２が多段に積層された筒状部２０を一例として説明したが、筒状部２０は、単一の筒状片２２で構成されてもよく、そのようなものも本考案の範囲に含まれる。 In the above, the tubular portion 20 in which the tubular pieces 22 are stacked in multiple stages has been described as an example, but the tubular portion 20 may be composed of a single tubular piece 22, and such a structure is also applicable. Included in the scope of the idea.

尚、本考案のハンドホールは、上記した実施の形態に限定されるものではなく、本考案の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。 It should be noted that the handhole of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

１ハンドホール
２本体部
２Ａ周壁
２Ｂ底部
２Ｃ中心軸
３蓋部
２０筒状部
２１上面プレート
２２，２２Ａ～２２Ｅ筒状片
２２Ｂ上方側筒状片
２２Ｃ下方側筒状片
２３底面プレート
２４第一コの字部材
２５第二コの字部材
２００中央辺部
２１０短辺部
２２０長辺部
２３０周壁部
２３１支持部
２３１Ａ支持片
２３２当接部
２３２Ａ当接片
２３３立設部
２３３Ａ立設片
２６０第一連結片
２６１第二連結片
２７０第一の辺
２７１第二の辺
２８０第一連結部分
２８１第二連結部分
３００鋼板
３０１～３０７仮想折り曲げ線線
３０８，３０９欠損部 Reference Signs List 1 hand hole 2 main body 2A peripheral wall 2B bottom 2C center shaft 3 lid 20 tubular portion 21 upper surface plate 22, 22A to 22E tubular piece 22B upper tubular piece 22C lower tubular piece 23 bottom plate 24 first piece U-shaped member 25 Second U-shaped member 200 Central side portion 210 Short side portion 220 Long side portion 230 Peripheral wall portion 231 Supporting portion 231A Supporting piece 232 Contacting portion 232A Contacting piece 233 Standing portion 233A Standing piece 260 First Connecting piece 261 Second connecting piece 270 First side 271 Second side 280 First connecting part 281 Second connecting part 300 Steel plates 301 to 307 Imaginary bending lines 308, 309 Missing part

Claims

A handhole comprising: a bottomed cylindrical main body having an open upper end and a closed lower end; and a lid covering the opening of the upper end of the main body,
The main body has a plurality of vertically stacked cylindrical pieces,
The tubular piece is rectangular when viewed from the vertical direction,
characterized in that the tubular piece is composed of a steel plate,
hand hole.

The cylindrical piece is composed of a PVC steel plate,
A handhole according to claim 1.

The cylindrical piece is
a peripheral wall portion forming the peripheral wall in the vertical direction;
a support portion whose diameter is reduced toward the inner side of the tubular piece starting from the upper end of the peripheral wall portion;
an abutting portion whose diameter decreases inwardly of the cylindrical piece starting from the lower end of the peripheral wall portion;
has
The support portion of the tubular piece is configured to receive the contact portion of the other tubular piece stacked on the upper side,
In the vicinity of the corners of the quadrangle when the cylindrical piece is viewed from the vertical direction, the support part and the contact part are formed with cutouts that are notches extending from the inner edge to the convex ends of the corners,
The tip of the missing part is separated inward from the convex end of the corner of the quadrangle,
A handhole according to claim 1.

The vicinity of the tip of the missing portion in the support portion and the contact portion is a thick region that is thicker than the basic thickness of the steel plate,
A handhole according to claim 3.

The support portion and the contact portion are formed by bending regions near the upper and lower ends of the steel plate having the cutout portions at the upper and lower ends thereof toward the inner side of the cylindrical piece,
The upper and lower end faces of the steel plate are positioned inside the cylindrical piece over the entire circumference of the cylindrical piece,
A handhole according to claim 3.

The cylindrical piece is formed by bending the steel plate inward so that the left and right end surfaces of the steel plate are located on the inner side of the cylindrical piece,
A handhole according to claim 5.

A sealing portion is provided for sealing the connecting portion of the tubular pieces adjacent in the vertical direction from the outside of the tubular piece along the entire circumference of the tubular piece,
A handhole according to claim 1.

The cylindrical piece is
a first U-shaped member that is U-shaped when viewed from the vertical direction;
a second U-shaped member that is U-shaped when viewed from the vertical direction and is connected to the first U-shaped member;
characterized by having
A handhole according to claim 1.

The first U-shaped member and the second U-shaped member are
a central side portion constituting the central side of the U-shape;
a short side portion that is continuous with one end of the central side portion and corresponds to one side that is bent from the central side portion;
a long side portion that is continuous with the other end of the central side portion, corresponds to the other side that is bent from the central side portion, and has a longer length than the short side portion;
characterized by having
A handhole according to claim 8.

While connecting the end of the short side of the first U-shaped member and the end of the long side of the second U-shaped member, the long side of the first U-shaped member The quadrangle of the cylindrical piece is configured by connecting the end and the end of the short side of the second U-shaped member,
A handhole according to claim 9 .

characterized by comprising a sealing portion that seals the connecting portion of the first U-shaped member and the second U-shaped member,
A handhole according to claim 10.

The long side has a length of at least twice the length of the short side,
A handhole according to claim 10.

The main body has a connecting mechanism that connects the tubular pieces that are adjacent in the vertical direction,
The cylindrical piece has a peripheral wall portion forming the peripheral wall in the vertical direction,
The connecting mechanism is
a supporting portion whose diameter is reduced toward the inner side of the lower cylindrical piece starting from the upper end of the peripheral wall portion of the lower cylindrical piece (hereinafter referred to as the lower cylindrical piece);
Starting from the lower end of the peripheral wall portion of the upper tubular piece (hereinafter referred to as the upper tubular piece), the diameter is reduced toward the inner side of the upper tubular piece, and the lower tubular piece a contact portion configured to contact the support portion when the upper cylindrical piece is placed;
a connecting member that connects the support portion and the contact portion that are in contact with each other with the upper cylindrical piece placed on the lower cylindrical piece;
characterized by having
A handhole according to claim 1.

When the upper tubular piece is placed on the lower tubular piece, the main body portion is arranged such that the outer peripheral surface of the peripheral wall portion of the lower tubular piece and the outer periphery of the peripheral wall portion of the upper tubular piece A positioning mechanism for positioning the upper tubular piece in the horizontal direction with respect to the lower tubular piece so that the surfaces are on the same plane,
14. A handhole according to claim 13.

The positioning mechanism is
a standing portion erected upward from the inner edge of the support portion of the lower cylindrical piece,
The inner edge of the contact portion of the upper tubular piece is engaged with the outer peripheral surface of the standing portion of the lower tubular piece in the horizontal direction,
15. A handhole according to claim 14.

The main body portion has an enlarged diameter portion at the lowermost end that expands outward from the outer peripheral surface of the peripheral wall of the main body portion,
The enlarged diameter portion receives earth pressure directed vertically downward, and restricts the movement of the body portion buried in the ground to the ground side,
A handhole according to claim 1.