JP2015166522A

JP2015166522A - Vertical conduit tube

Info

Publication number: JP2015166522A
Application number: JP2014040987A
Authority: JP
Inventors: 正登竹川; Masato Takegawa; 良祐手嶋; Ryosuke Tejima
Original assignee: Haneda Zenith Co Ltd
Current assignee: Haneda Zenith Co Ltd
Priority date: 2014-03-03
Filing date: 2014-03-03
Publication date: 2015-09-24
Anticipated expiration: 2034-03-03
Also published as: JP6062387B2

Abstract

PROBLEM TO BE SOLVED: To provide a vertical conduit tube such that the state of water flowing down inside can be observed.SOLUTION: A spiral flow type vertical conduit tube 1 including an outer cylinder part 2 and a spiral part provided in the outer cylinder part 2 is provided with a manhole cylinder part 11 in the center of the spiral part 3, and the manhole cylinder part 11 is provided with a window part 14 for viewing. Consequently, an operator who enters the manhole cylinder part 11 can observe a water flow in the vertical conduit tube 1 through the window part 14. Steps 13 for upward/downward movement are provided in the manhole cylinder part 11, so the operator can move up and down in the manhole by using the steps 11 for upward/downward movement. A base division part 7 is formed which includes division outer cylinder parts 5 formed by dividing the outer cylinder part 2 in a length direction and division spiral parts 6 formed by dividing the spiral part 3 including the manhole cylinder part 11 in a peripheral direction, and a plurality of basic division parts 7, 7 are coupled together in a length direction.

Description

本発明は、下水道用人孔や雨水流入用の竪管等に用いられる螺旋案内路付きの垂直導水管に関する。 The present invention relates to a vertical water guide pipe with a spiral guide used for a sewer manhole, a rainwater inflow pipe, and the like.

従来、下水道用人孔において流入管と流出管に落差がある場合、その落差高の大小により落下方式を選択しており、螺旋流（旋回流）方式が知られている。 Conventionally, when there is a drop in the inflow pipe and the outflow pipe in the sewer manhole, the drop method is selected depending on the height of the drop, and the spiral flow (swirl flow) method is known.

これは断面円形の頭部で接線方向に水流を与えて旋回流を得る方式である。この方式の流線は重力により旋回流からやがて鉛直流に変化していく。この場合、落下量、直径、初期流速、着地深度の要素をその都度試験に求める必要がある。 This is a system in which a swirl flow is obtained by giving a water flow in a tangential direction with a head having a circular cross section. The streamline of this method changes from a swirl flow to a vertical flow due to gravity. In this case, it is necessary to obtain the factors of the fall amount, the diameter, the initial flow velocity, and the landing depth for each test.

図１０に示すように、中空筒（空気抜き）101の周りに、螺旋流を発生させるヘリコロイド面を有する螺旋状の板102を設けた、空気道を備えた螺旋案内路付き垂直導水管である（例えば、特許文献１〜４参照）。これら垂直導水管は、ＦＲＰやＦＲＰＭなどから形成されており、それ自体は土圧に対する強度を備えていないため、施工においては、コンクリート製からなる壁体によりボックス状などの地下構造物を形成し、この地下構造物の内部空間に前記垂直導水管が配置される。このため垂直導水管の大型化に制約を受け易く、流量を確保するには多量の水を流す必要があるため、上部から内部の空気を外部に排出する中空筒が必要となる。さらに、地下構造物と垂直導水管の二重構造となるため、材料及び施工にコストが掛かる。 As shown in FIG. 10, a vertical water guide pipe with a spiral guide path provided with an air passage is provided with a spiral plate 102 having a helicoid surface for generating a spiral flow around a hollow cylinder (air vent) 101. (For example, see Patent Documents 1 to 4). These vertical water conduits are made of FRP, FRPM, etc., and they themselves do not have strength against earth pressure. Therefore, in the construction, underground structures such as boxes are formed by walls made of concrete. The vertical water conduit is disposed in the internal space of the underground structure. For this reason, it is easy to be restricted by an increase in the size of the vertical water conduit, and in order to secure a flow rate, it is necessary to flow a large amount of water. Therefore, a hollow cylinder that discharges internal air from the top to the outside is required. Furthermore, since it has a double structure of an underground structure and a vertical water conduit, costs are incurred for materials and construction.

近年、高落差の場合、壁面摩擦抵抗を多く取り、到達速度を下げ、かつ、空気道を備えた螺旋案内路付きの螺旋流方式が採用されることが多い。 In recent years, in the case of a high head, a spiral flow method with a spiral guide path having a large wall friction resistance, a low arrival speed, and an air passage is often employed.

また、大型のものでは螺旋部上に階段を設け、階段を用いて内部を移動可能にした垂直導水管（例えば、特許文献５）や、螺旋案内板の軸心に空洞部を設け、この空洞部に点検用の梯子を設けたもの（例えば、特許文献６）がある。 Further, in the case of a large size, a staircase is provided on the spiral portion, and a hollow portion is provided in the vertical water guide pipe (for example, Patent Document 5) that can move inside using the staircase, or the axial center of the spiral guide plate. There is one (for example, Patent Document 6) in which a ladder for inspection is provided in the part.

特開２００２−３２２７２９号公報JP 2002-322729 A 特開２００１−３１１４８３号公報JP 2001-311483 A 特開２００１−２７９７９８号公報JP 2001-279798 A 特開２００１−２７１４１４号公報JP 2001-271414 A 特開２００４−３３９９２２号公報JP 2004-339922 A 特開２０１１−８９３３８号公報JP 2011-89338 A

上記特許文献１〜４のものに対して、特許文献５及び６の垂直導水管では、点検などのために階段や梯子を用いて内部を移動することができるため利便性に優れる。 In contrast to the above-mentioned Patent Documents 1 to 4, the vertical water conduits of Patent Documents 5 and 6 are excellent in convenience because they can be moved inside using stairs and ladders for inspection and the like.

しかし、水が流れる状態では階段や梯子を使用できないから、内部の水流の状態を確認することはできなかった。 However, since the stairs and ladders cannot be used when water is flowing, the state of the internal water flow could not be confirmed.

そこで、本発明は上記した問題点に鑑み、内部を流れて落下する水の状態を観測することができる垂直導水管を提供することを目的とする。 In view of the above-described problems, an object of the present invention is to provide a vertical water conduit capable of observing the state of water flowing inside and falling.

上記目的を達成するために、請求項１に係る発明は、外筒部と、この外筒部の内部に設けた螺旋部とを備えた螺旋流方式の垂直導水管において、前記螺旋部の中央に人孔用筒部を設け、この人孔用筒部の下部を閉塞し、前記人孔用筒部に視認可能な窓部を設け、前記人孔用筒部の内壁に昇降用ステップを設けたことを特徴とする。 In order to achieve the above object, the invention according to claim 1 is directed to a spiral flow type vertical water conduit having an outer tube portion and a spiral portion provided inside the outer tube portion, and the center of the spiral portion. A human hole cylinder is provided, the lower portion of the human hole cylinder is closed, a visible window is provided in the human hole cylinder, and an elevation step is provided on the inner wall of the human hole cylinder. It is characterized by that.

また、請求項２に係る発明は、前記窓部を前記螺旋部の下面の下側に設けたことを特徴とする。 The invention according to claim 2 is characterized in that the window portion is provided below the lower surface of the spiral portion.

また、請求項３に係る発明は、前記外筒部を長さ方向に分割した分割外筒部と、前記人孔用筒部を囲む前記螺旋路を周方向に分割した分割螺旋部とを備えた基本分割部を形成し、複数の基本分割部を長さ方向に連結したことを特徴とする。 The invention according to claim 3 includes: a divided outer cylinder part obtained by dividing the outer cylinder part in the length direction; and a divided spiral part obtained by dividing the spiral path surrounding the human hole cylinder part in the circumferential direction. The basic division part is formed, and a plurality of basic division parts are connected in the length direction.

また、請求項４に係る発明は、同一形状の前記基本分割部を長さ方向に連結下ことを特徴とする。 The invention according to claim 4 is characterized in that the basic divided parts having the same shape are connected in the length direction.

また、請求項５に係る発明は、前記基本分割部は、前記人孔用筒部の外側に沿う支持部を備えることを特徴とする。 In addition, the invention according to claim 5 is characterized in that the basic division portion includes a support portion along an outer side of the cylindrical portion for the human hole.

本発明の請求項１に記載の垂直導水管によれば、人孔用筒部に入った作業者は、昇降用ステップを用いて人孔用筒部内を昇降し、窓部を通して垂直導水管内の水流を観察することができる。 According to the vertical water conduit according to claim 1 of the present invention, the worker who has entered the manhole tube portion moves up and down in the manhole tube portion using the lifting step and passes through the window portion in the vertical water conduit. The water flow can be observed.

また、本発明の請求項２に記載の垂直導水管によれば、水流をその上方から観察することができる。 Moreover, according to the vertical water conduit described in claim 2 of the present invention, the water flow can be observed from above.

また、本発明の請求項３に記載の垂直導水管によれば、基本分割部を積み重ねるように長さ方向に連結して分割螺旋案内部が連続した垂直導水管を形成することができる。 Moreover, according to the vertical water conduit described in claim 3 of the present invention, it is possible to form a vertical water conduit in which the divided spiral guide portions are continuous by connecting the basic divided portions in the longitudinal direction so as to be stacked.

また、本発明の請求項４に記載の垂直導水管によれば、同一形状の基本分割部を積み重ねて垂直導水管を形成することができる。 Moreover, according to the vertical water conduit described in claim 4 of the present invention, the vertical water conduit can be formed by stacking the basic divided portions having the same shape.

また、本発明の請求項５に記載の垂直導水管によれば、分割内筒部により人孔用筒部を支持することができる。 Further, according to the vertical water guide pipe of the fifth aspect of the present invention, the human hole tube portion can be supported by the divided inner tube portion.

本発明の実施例１を示す上蓋板と流入側分割部との分解斜視図である。It is a disassembled perspective view of the upper cover board and inflow side division | segmentation part which shows Example 1 of this invention. 同上、基本分割部の斜視図である。It is a perspective view of a basic division part same as the above. 同上、図２に対して１２０度回転した基本分割部の斜視図である。FIG. 3 is a perspective view of the basic division unit rotated 120 degrees with respect to FIG. 2. 同上、図２の基本分割部の平面図である。FIG. 3 is a plan view of the basic division unit of FIG. 同上、基本分割部の平面説明図であり、図５（Ａ）は流入側基本分割部、図５（Ｂ）は流入側基本分割部の下に連結する上段の基本分割部、図５（Ｃ）は図（Ｂ）に対して１８０度半時計回り方向に回転した中段（中間）の基本分割部、図５（Ｄ）は流出側基本部の上に連結した下段の基本分割部を示す。FIG. 5A is an explanatory plan view of the basic dividing unit, FIG. 5A is an inflow side basic dividing unit, FIG. 5B is an upper basic dividing unit coupled under the inflow side basic dividing unit, and FIG. ) Shows a middle (intermediate) basic divided portion rotated 180 degrees counterclockwise with respect to FIG. (B), and FIG. 5 (D) shows a lower basic divided portion connected on the outflow side basic portion. 同上、人孔用筒部の斜視図である。It is a perspective view of the cylinder part for human holes same as the above. 同上、螺旋導入管の平面図である。It is a top view of a spiral introduction tube same as the above. 同上、図７のＡ−Ａ線断面図である。FIG. 8 is a cross-sectional view taken along line AA in FIG. 本発明の実施例２を示す断面である。It is a cross section which shows Example 2 of this invention. 従来例を示す断面図である。It is sectional drawing which shows a prior art example.

本発明における好適な実施の形態について、添付図面を参照しながら詳細に説明する。なお、以下に説明する実施の形態は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須要件であるとは限らない。各実施例では、従来とは異なる新規な構成を採用することにより、従来にない機能を付加した垂直導水管が得られ、その垂直導水管を夫々記述する。 Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new configuration different from the conventional one, a vertical conduit having an unconventional function can be obtained, and each vertical conduit is described.

以下、図面を参照して、本発明の実施例１について説明する。図１〜図８に示すように、本実施例の垂直導水管１は、土圧を受ける外筒部２と、この外筒部２の内部に設けられ螺旋案内路を構成する螺旋部３と、この螺旋部３の中央に設けた人孔用筒部11とを備え、この人孔用筒部11は、外筒部２の中央に位置すると共に、外筒部２の中心軸と同軸をなす。また、垂直導水管１はコンクリート製のものを用いることができる。尚、人孔用筒部11は、その内部において下から上に空気を逃がす空気抜きの効果は備えていない。 Embodiment 1 of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 8, the vertical water guide pipe 1 of the present embodiment includes an outer cylinder portion 2 that receives earth pressure, and a spiral portion 3 that is provided inside the outer cylinder portion 2 and constitutes a spiral guide path. And a human hole cylinder portion 11 provided in the center of the spiral portion 3. The human hole cylinder portion 11 is located at the center of the outer cylinder portion 2 and coaxial with the central axis of the outer cylinder portion 2. Eggplant. Further, the vertical water conduit 1 can be made of concrete. The manhole cylinder 11 does not have an air venting effect for escaping air from the bottom to the inside.

前記垂直導水管１は、図１〜図３などに示すように、前記外筒部２を長さ方向に分割した分割外筒部５と、前記人孔用筒部４を囲む前記螺旋部３を周方向に分割した分割螺旋部６とを有する基本分割部７を複数備え、前記分割外筒部５は円筒形又は角筒型をなし、この例では円筒形のものを図示している。 As shown in FIGS. 1 to 3, and the like, the vertical water guide pipe 1 includes a split outer cylinder part 5 obtained by dividing the outer cylinder part 2 in the length direction, and the spiral part 3 surrounding the human hole cylinder part 4. A plurality of basic divided portions 7 having a divided spiral portion 6 divided in the circumferential direction are provided, and the divided outer cylinder portion 5 has a cylindrical shape or a rectangular tube shape. In this example, a cylindrical shape is illustrated.

図６に示すように、前記人孔用筒部11は、前記基本分割部７とは別体で形成され、複数の分割筒部12を長さ方向に水密に連結してなり、その人孔用筒部11の内壁に昇降用ステップ13を上下方向に間隔を置いて配置している。また、前記複数の分割筒部12の少なくとも１つには、透視可能な窓部14を設け、この窓部14は透明板などからなり、水密に形成されている。尚、窓部14は、後述する円弧部の無い箇所に配置され、この例では、上から２段目の分割筒部12と下から２段目の分割筒部に窓部14，14を設け、両窓部14，14は平面で９０度回転した位置に配置されているが、１８０度ずれた位置でもよい。また、人孔用筒部11の下部は、板状の下蓋体15により塞がれている。したがって、人孔用筒部11の下部から人孔用筒部11と外筒部２との間の空気や水が入ってくることがなく、人孔用筒部11内は気密且つ水密に形成されている。 As shown in FIG. 6, the manhole tube portion 11 is formed separately from the basic divided portion 7, and is formed by water-tightly connecting a plurality of divided tube portions 12 in the length direction. Elevating steps 13 are arranged on the inner wall of the cylinder part 11 at intervals in the vertical direction. Further, at least one of the plurality of divided tube portions 12 is provided with a see-through window portion 14. The window portion 14 is made of a transparent plate or the like and is formed watertight. The window portion 14 is disposed at a place without an arc portion, which will be described later, and in this example, the window portions 14 and 14 are provided in the divided cylinder portion 12 at the second stage from the top and the divided cylinder portion at the second stage from the bottom. The window portions 14 and 14 are arranged at positions rotated 90 degrees on a plane, but may be positions shifted by 180 degrees. Further, the lower portion of the human hole cylinder 11 is closed by a plate-like lower lid body 15. Therefore, air and water between the human hole cylinder 11 and the outer cylinder 2 do not enter from the lower part of the human hole cylinder 11, and the inside of the human hole cylinder 11 is formed airtight and watertight. Has been.

さらに、人孔用筒部11の中央には、板状の支持部16を設け、支持部16には人が通過可能な通過孔17を穿設し、通過孔17の付近の上下でステップ13の取りつけ位置を１８０度異なる位置に設けている。尚、人孔用筒部11の直径（内径）を６００ｍｍ以上とすることが好ましい。 Further, a plate-like support portion 16 is provided at the center of the manhole tube portion 11, and a passage hole 17 through which a person can pass is formed in the support portion 16. Are provided at positions 180 degrees different from each other. In addition, it is preferable that the diameter (inner diameter) of the cylinder portion 11 for human holes is 600 mm or more.

図２及び図４などに示すように、前記分割螺旋部６は、平板状をなす傾斜板21を水平に対して斜めに配置し、その傾斜板21の外周を前記外筒部２の内周に固定している。また、略扇形の傾斜板21の上側縁面22Ｕと下側縁面22Ｓとは、外筒部２の半径方向に形成され、それら上側縁面22Ｕと下側縁面22Ｓとは平面視で１２０度の角度θをなす。この角度θは、３６０度を自然数で割ったものである。また、傾斜板21の上端角部23Ｕが分割外筒部５の上面側に位置し、傾斜板21の下端角部23Ｓが分割外筒部５の下面側に位置する。尚、分割螺旋部６は、上流側である上側縁面22Ｕに対して平面視で半時計回り方向に位置する下流側である下側縁面22Ｓに向かって低くなり、傾斜板21の水平に対する角度は４５度以下である。 As shown in FIGS. 2 and 4, the split spiral portion 6 has a flat plate-like inclined plate 21 arranged obliquely with respect to the horizontal, and the outer periphery of the inclined plate 21 is the inner periphery of the outer tube portion 2. It is fixed to. Further, the upper edge surface 22U and the lower edge surface 22S of the substantially sector-shaped inclined plate 21 are formed in the radial direction of the outer cylinder portion 2, and the upper edge surface 22U and the lower edge surface 22S are 120 in plan view. An angle θ of degrees is formed. This angle θ is 360 degrees divided by a natural number. Further, the upper end corner 23 </ b> U of the inclined plate 21 is located on the upper surface side of the divided outer cylinder part 5, and the lower end corner part 23 </ b> S of the inclined plate 21 is located on the lower surface side of the divided outer cylinder part 5. The split spiral portion 6 is lowered toward the lower edge surface 22S, which is the downstream side located in the counterclockwise direction in plan view, with respect to the upper edge surface 22U, which is the upstream side, with respect to the horizontal of the inclined plate 21. The angle is 45 degrees or less.

そして、前記上側縁面22Ｕには、上下方向の上垂直板24が上向きに一体に設けられ、この上垂直板24の上面24Ｊは前記分割外筒部５の上面（上縁面）と略面一であり、また、前記下側縁面22Ｓには、上下方向の下垂直板25が下向きに一体に設けられ、この下垂直板25の下面（下縁面）25Ｋは前記分割外筒部５の下面と略面一であり、それら上，下垂直板24，25は側面視で直角三角形をなし、上垂直板24の三角形の９０度の角は上部に位置し、下垂直板25の三角形の９０度の角は下部に位置する。 An upper vertical plate 24 in the vertical direction is integrally provided upward on the upper edge surface 22U, and the upper surface 24J of the upper vertical plate 24 is substantially the same as the upper surface (upper edge surface) of the divided outer cylinder portion 5. In addition, a lower vertical plate 25 in the vertical direction is integrally provided downward on the lower edge surface 22S, and a lower surface (lower edge surface) 25K of the lower vertical plate 25 is a lower surface of the divided outer cylinder portion 5. The upper and lower vertical plates 24 and 25 form a right triangle in a side view, the 90-degree angle of the triangle of the upper vertical plate 24 is located at the top, and the 90-degree angle of the triangle of the lower vertical plate 25 The corner is at the bottom.

また、前記傾斜板21の中央縁は、前記人孔用筒部４に対応して、平面視で円弧状に切り欠かれており、その中央縁の上部に分割内筒部たる円弧部26を突設し、この円弧部26の内面が前記人孔用筒部４の外周に添う。また、この円弧部26の平面視における角度は前記角度θと同一である。 Further, the central edge of the inclined plate 21 is cut out in an arc shape in plan view corresponding to the cylindrical portion 4 for the human hole, and an arc portion 26 as a divided inner cylinder portion is formed on the upper portion of the central edge. It protrudes and the inner surface of this circular arc part 26 follows the outer periphery of the said cylinder part 4 for human holes. Further, the angle of the arc portion 26 in plan view is the same as the angle θ.

図１に示すように、前記垂直導水管１の上部には、分割外筒部５に流入孔31を有する流入側分割部32が設けられる。この流入側分割部32は、内部に平面視の角度θが前記円弧部26と同一の円弧部33を有し、この円弧部33は分割外筒部５と同一長さを有し、前記円弧部26の上流側縁と分割外筒部５の内周とを、半径方向の垂直板34により連結し、この垂直板34は分割外筒部５の全長に設けられている。また、前記流入孔31の左縁31Ｌは、前記垂直板34の上流側で垂直板34の下流側の面に位置する。即ち、流入孔31の上流側に垂直板34が位置する。そして、前記円弧部33が前記人孔用筒部11の外周に沿う。尚、円弧部26，33は円筒の一部分である。 As shown in FIG. 1, an inflow side divided portion 32 having an inflow hole 31 in the divided outer cylinder portion 5 is provided at the upper portion of the vertical water conduit 1. The inflow side dividing portion 32 has an arc portion 33 having an angle θ in plan view that is the same as that of the arc portion 26, and the arc portion 33 has the same length as the divided outer cylinder portion 5. The upstream edge of the portion 26 and the inner periphery of the divided outer cylinder portion 5 are connected by a radial vertical plate 34, and the vertical plate 34 is provided over the entire length of the divided outer cylinder portion 5. The left edge 31L of the inflow hole 31 is located on the upstream side of the vertical plate 34 and on the downstream side of the vertical plate 34. That is, the vertical plate 34 is located on the upstream side of the inflow hole 31. The arc portion 33 extends along the outer periphery of the manhole tube portion 11. The arc portions 26 and 33 are part of a cylinder.

また、流入側分割部32の上部には板状の上蓋体35が設けられ、この上蓋体35の中央には前記人孔用筒部11の上部開口に連通する開口部36が設けられ、この開口部36には開口部蓋（図示せず）が開閉可能に設けられている。 In addition, a plate-like upper lid 35 is provided at the upper part of the inflow side dividing portion 32, and an opening 36 communicating with the upper opening of the manhole cylinder 11 is provided at the center of the upper lid 35. The opening 36 is provided with an opening lid (not shown) that can be opened and closed.

図１及び図５（Ａ）（Ｂ）などに示すように、流入側分割部22の下部に連結する上段の基本分割部７は、その上垂直板24が流入側分割部32の垂直板34の下部に位置するように配置される。 As shown in FIG. 1 and FIGS. 5A and 5B, the upper basic dividing portion 7 connected to the lower portion of the inflow side dividing portion 22 has an upper vertical plate 24 whose vertical plate 34 is the inflow side dividing portion 32. It arrange | positions so that it may be located in the lower part of.

図３に示すように、前記垂直導水管１の下部には、分割外筒部５に流出孔41を有する流出側分割部42を有する。また、流出側分割部42の下部には板状の下蓋体43が設けられている。 As shown in FIG. 3, at the lower part of the vertical water guide pipe 1, there is an outflow side dividing portion 42 having an outflow hole 41 in the divided outer cylinder portion 5. A plate-like lower lid body 43 is provided at the lower part of the outflow side dividing portion 42.

次に、前記垂直導水管１の施工方法について説明する。まず、地中に外筒部２を埋設する掘削孔（図示せず）を形成し、この掘削孔の内部において、二次製品から構成する垂直導水管１を組み立てた後、周囲を埋戻し、外筒部２には土圧が加わり、垂直導水管１は土圧に対抗する強度を有する。具体的には、流出側分割部42の下部に下蓋体43を固定し、流出側分割部42の分割外筒部５と下蓋体43との目地部には防水加工を施して水密性を確保する。この場合、部材同士はボルトなどの連結具により連結固定すると共に、連結箇所を防水加工する。 Next, the construction method of the said vertical water conduit 1 is demonstrated. First, an excavation hole (not shown) for embedding the outer cylinder portion 2 is formed in the ground, and after assembling the vertical water conduit 1 composed of the secondary product inside the excavation hole, the surroundings are backfilled, Earth pressure is applied to the outer cylinder portion 2, and the vertical water conduit 1 has strength against the earth pressure. Specifically, the lower lid body 43 is fixed to the lower part of the outflow side division section 42, and the joint between the divided outer cylinder section 5 and the lower lid body 43 of the outflow side division section 42 is waterproofed to be watertight. Secure. In this case, the members are connected and fixed by a connecting tool such as a bolt, and the connected portion is waterproofed.

流出側分割部42の上に基本分割部７を重ね合わせ、それらの分割外筒部５，５同士を連結する。この場合、図３及び図５（Ｄ）に示すように、上の基本分割部７は、その下垂直板25が流出孔41の縁41Ｆの上流側で上部に位置するように、流出側分割部42の上に基本分割部７を重ね合わせる。即ち、下垂直板25と流出孔41の平面位置は、前記上垂直板24と流入孔31の位置と同一であって、流出孔41の上流側に下垂直板25が位置する。 The basic divided portion 7 is overlaid on the outflow side divided portion 42, and the divided outer cylindrical portions 5 and 5 are connected to each other. In this case, as shown in FIG. 3 and FIG. 5D, the upper basic dividing portion 7 has an outflow side dividing portion so that the lower vertical plate 25 is located on the upper side of the edge 41F of the outflow hole 41. The basic division unit 7 is overlaid on 42. That is, the planar positions of the lower vertical plate 25 and the outflow hole 41 are the same as the positions of the upper vertical plate 24 and the inflow hole 31, and the lower vertical plate 25 is located upstream of the outflow hole 41.

流出側分割部42に連結した基本分割部７の上部に、基本分割部７を連結する。この場合、下段の基本分割部７の上垂直板24の上面24Ｊに、上段の基本分割部７の下垂直板25の下面25Ｋが位置するように配置して基本分割部７，７同士を連結する。これにより垂直板24，25同士は面一となる。 The basic dividing unit 7 is connected to the upper part of the basic dividing unit 7 connected to the outflow side dividing unit 42. In this case, the basic divided portions 7 are connected to each other by placing the lower surface 25K of the lower vertical plate 25 of the upper basic divided portion 7 on the upper surface 24J of the upper vertical plate 24 of the lower basic divided portion 7. . As a result, the vertical plates 24 and 25 are flush with each other.

このように、下の基本分割部７の上垂直板24の上面24Ｊに、上の基本分割部７の下垂直板25の下面25Ｋが位置するように連結することにより、下の基本分割部７と上の基本分割部７は、それらの分割螺旋部６，６が平面視で１２０度ずれると共に、連続して配置される。このように３つの基本分割部７，７を連結することにより、３６０度連続する螺旋部３が形成される。尚、基本分割部７の数は適宜選定することができ、好ましくは角度θが１２０度の３個以上であり、合計で３６０度以上とする。 In this way, the lower basic divided portion 7 is connected to the upper surface 24J of the upper vertical plate 24 of the lower basic divided portion 7 so that the lower surface 25K of the lower vertical plate 25 of the upper basic divided portion 7 is positioned. The upper basic dividing portion 7 is continuously arranged while the divided spiral portions 6 and 6 are shifted by 120 degrees in a plan view. By connecting the three basic divided portions 7 and 7 in this way, a spiral portion 3 continuous 360 degrees is formed. In addition, the number of the basic division parts 7 can be selected as appropriate. Preferably, the angle θ is three or more of 120 degrees, and the total is 360 degrees or more.

また、垂直導水管１の上部においては、図１及び図５（Ａ）（Ｂ）に示すように、最上段の基本分割部７の上垂直板24に、流入側分割部32の垂直板34を合わせて、最上段の基本分割部７に流入側分割部32を重ね合わせて連結する。 Further, in the upper part of the vertical water conduit 1, as shown in FIGS. 1 and 5A and 5B, the upper vertical plate 24 of the uppermost basic divided portion 7 and the vertical plate 34 of the inflow side divided portion 32 are provided. And the inflow side dividing portion 32 is overlapped and connected to the uppermost basic dividing portion 7.

また、分割部７，32，42の施工に合わせて、中央に分割筒部12を積み重ねて連結し、人孔用筒部11を構築する。そして、流入側分割部32の上に上蓋体35を取り付けて人孔用筒部11を塞ぐ。また、流入孔31に図示しない流入管を接続し、流出孔41に図示しない流出管を接続する。 Further, in accordance with the construction of the division parts 7, 32, 42, the division cylinder part 12 is stacked and connected in the center to construct the cylinder part 11 for human holes. Then, the upper lid 35 is attached on the inflow side dividing portion 32 to close the manhole cylinder portion 11. In addition, an inflow pipe (not shown) is connected to the inflow hole 31, and an outflow pipe (not shown) is connected to the outflow hole 41.

次に、前記構成につき、その作用を説明する。流入孔31から流れ込んだ水は、図５（Ａ）（Ｂ）において、垂直板34，24及び円弧部33，26に案内されて、傾斜板21に沿って旋回流となり、図５（Ｂ）（Ｃ）において、重ね合わせた上垂直板24と下垂直板25から図５（Ｃ）の傾斜板21に落下し、傾斜板21に沿って流れ、同様に、図５（Ｃ）（Ｄ）において、重ね合わせた上垂直板24と下垂直板25から傾斜板21に落下し、傾斜板21に沿って流れ、図５（Ｄ）の下垂直板25から旋回流として、流出側分割部42に流れ込み、流出孔41から外部に流出する。この場合、コンクリート製の外筒部２が土圧を受けるため、水が流れる外筒部２の内部の断面積を大きく取ることができ、流量に比べて大きな断面積を備えた垂直導水管１を構成することができるため、従来のような空気抜きが不要となる。また、垂直導水管１を埋め戻すから、コストの削減が可能となる。 Next, the effect | action is demonstrated about the said structure. 5 (A) and 5 (B), the water flowing from the inflow hole 31 is guided by the vertical plates 34 and 24 and the arc portions 33 and 26 to become a swirl flow along the inclined plate 21, and FIG. 5 (B). In (C), the superposed upper vertical plate 24 and lower vertical plate 25 fall onto the inclined plate 21 in FIG. 5C and flow along the inclined plate 21, and similarly in FIGS. 5C and 5D. Then, the upper vertical plate 24 and the lower vertical plate 25 are dropped onto the inclined plate 21 and flow along the inclined plate 21, and flow into the outflow side dividing section 42 as a swirling flow from the lower vertical plate 25 of FIG. It flows out from the outflow hole 41 to the outside. In this case, since the concrete outer cylinder part 2 receives earth pressure, the vertical cross-sectional area of the outer cylinder part 2 through which water flows can be increased, and the vertical water conduit 1 having a larger cross-sectional area than the flow rate. Therefore, conventional air venting is not necessary. Moreover, since the vertical water conduit 1 is backfilled, the cost can be reduced.

また、観察者は、上部開口から人孔用筒部11内に入り、コ字型のステップ13を使って昇降し、窓部14から垂直導水管１内の水の流れを確認することができる。そして、流れを確認できるだけでなく、観察の結果、流れを妨げるものや、長期使用により破損箇所を早期に確認して対応することができる。 Further, the observer can enter the manhole tube portion 11 from the upper opening, move up and down using the U-shaped step 13, and check the flow of water in the vertical conduit 1 from the window portion 14. . And not only can the flow be confirmed, but the result of the observation can be a matter that obstructs the flow, and can confirm the damaged part at an early stage due to long-term use.

このように本実施例では、請求項１に対応して、外筒部２と、この外筒部２の内部に設けた螺旋部３とを備えた螺旋流方式の垂直導水管１において、前記螺旋部３の中央に人孔用筒部11を設け、この人孔用筒部11の下部を閉塞し、人孔用筒部11に視認可能な窓部14を設け、人孔用筒部の内壁に昇降用ステップを設けたから、人孔用筒部11に入った作業者は、昇降用ステップ13を用いて人孔内を昇降し、窓部14を通して垂直導水管１内の水流を観察することができる。 As described above, in this embodiment, corresponding to claim 1, in the vertical flow conduit 1 of the spiral flow system including the outer cylinder portion 2 and the spiral portion 3 provided inside the outer cylinder portion 2, A human hole cylinder 11 is provided at the center of the spiral part 3, the lower part of the human hole cylinder 11 is closed, a visible window 14 is provided in the human hole cylinder 11, Since the elevating step is provided on the inner wall, the worker who has entered the manhole tube portion 11 moves up and down in the manhole using the elevating step 13 and observes the water flow in the vertical conduit 1 through the window portion 14. be able to.

また、このように本実施例では、請求項３に対応して、外筒部２を長さ方向に分割した分割外筒部５と、人孔用筒部11を囲む螺旋部３を周方向に分割した分割螺旋部６とを備えた基本分割部７を形成し、複数の基本分割部７，７を長さ方向に連結してなるから、基本分割部７，７・・・を積み重ねるように長さ方向に連結して分割螺旋部６，６・・・が連続した垂直導水管１を形成することができる。 As described above, in this embodiment, corresponding to claim 3, the divided outer cylinder part 5 obtained by dividing the outer cylinder part 2 in the length direction and the spiral part 3 surrounding the human hole cylinder part 11 are arranged in the circumferential direction. Is formed by connecting the plurality of basic divided portions 7 and 7 in the length direction, so that the basic divided portions 7 are stacked. It is possible to form a vertical water guide pipe 1 which is connected in the longitudinal direction and in which the divided spiral portions 6, 6... Are continuous.

また、このように本実施例では、請求項４に対応して、同一形状の基本分割部７，７，７を長さ方向に連結してなる同一形状の基本分割部７，７，７を積み重ねて垂直導水管１を形成することができるため、部品管理及び施工が容易となる。 In this way, in this embodiment, corresponding to claim 4, the basic divided portions 7, 7, 7 having the same shape formed by connecting the basic divided portions 7, 7, 7 having the same shape in the length direction are provided. Since the vertical water conduit 1 can be formed by stacking, parts management and construction are facilitated.

また、このように本実施例では、請求項５に対応して、基本分割部７は、人孔用筒部11の外側に沿う支持部たる円弧部26を備えるから、円弧部26により人孔用筒部11を支持することができる。また、人孔用筒部11を円弧部26に連結してもよい。 In this way, in this embodiment, corresponding to claim 5, the basic dividing portion 7 is provided with the arc portion 26 that is a support portion along the outside of the manhole tube portion 11, so that the manhole is formed by the arc portion 26. The cylinder portion 11 can be supported. Further, the manhole tube portion 11 may be connected to the arc portion 26.

また、本実施例上の効果として、基本分割部７，32，42と別個に人孔用筒部11を形成するから、人孔用筒部11の水密性を確保することができる。また、分割螺旋部６は、平板状をなす傾斜板21を外筒部２の中心軸に対して斜めに配置したから、螺子状の螺旋に比べて製造が容易になる。さらに、基本分割部７，７は、上，下垂直板24，25を合わせることにより、施工が容易となる。また、外筒部２は大径（2000ｍｍ以上）であるから、満水になることは少なく、空気抜きが不要となる。さらに、円弧部33，26は平面視で人孔用筒部11の全周を支持するから、人孔用筒部11が安定する。また、固定支持体たる下蓋体43の上に人孔用筒部11を立設し、人孔用筒部11の下部は、板状の下蓋体15により塞がれ、下蓋板15を介して人孔用筒部11が下蓋体43に支持されるから、人孔用筒部11を安定して設置することができる。この場合、人孔用筒部11の下部を下蓋体43により塞ぐと共に、下蓋板43により人孔用筒部11を支持してもよい。 Further, as an effect of the present embodiment, since the human hole cylinder portion 11 is formed separately from the basic division portions 7, 32, and 42, the water tightness of the human hole cylinder portion 11 can be ensured. Further, since the inclined plate 21 having a flat plate shape is disposed obliquely with respect to the central axis of the outer cylinder portion 2, the divided spiral portion 6 is easily manufactured as compared with the screw-shaped spiral. Furthermore, the basic division parts 7 and 7 can be easily constructed by combining the upper and lower vertical plates 24 and 25 together. Moreover, since the outer cylinder part 2 is a large diameter (2000 mm or more), it is rare that it becomes full of water and an air vent becomes unnecessary. Furthermore, since the arc portions 33 and 26 support the entire circumference of the human hole cylinder portion 11 in plan view, the human hole cylinder portion 11 is stabilized. Further, a manhole tube portion 11 is erected on the lower lid body 43 serving as a fixed support, and the lower portion of the manhole tube portion 11 is closed by a plate-like lower lid body 15 so that the lower lid plate 15 Since the human hole cylinder portion 11 is supported by the lower lid body 43, the human hole cylinder portion 11 can be stably installed. In this case, the lower portion of the human hole cylinder portion 11 may be closed by the lower lid body 43, and the human hole cylinder portion 11 may be supported by the lower lid plate 43.

図９は、本発明の実施例２を上記実施例１と同一部分に同一符号を付し、その詳細な説明を省略して詳述する。この例では、人孔用筒部11に設ける窓部14は、螺旋部３の下面の下側に設けられており、窓部14が水没し難くなる。尚、螺旋部３の上面より螺旋部３の下面に近い位置に窓部14が設けられている。 In FIG. 9, the second embodiment of the present invention will be described in detail with the same reference numerals assigned to the same parts as the first embodiment and detailed description thereof omitted. In this example, the window portion 14 provided in the manhole tube portion 11 is provided on the lower side of the lower surface of the spiral portion 3, and the window portion 14 is difficult to be submerged. A window portion 14 is provided at a position closer to the lower surface of the spiral portion 3 than the upper surface of the spiral portion 3.

このように本実施例では、請求項２に対応して、窓部14を螺旋部２の下面の下側に設けたから、水流をその上方から観察することができる。 As described above, in this embodiment, since the window portion 14 is provided on the lower side of the lower surface of the spiral portion 2 in correspondence with the second aspect, the water flow can be observed from above.

尚、本発明は、本実施例に限定されるものではなく、本発明の要旨の範囲内で種々の変形実施が可能である。例えば、実施例では、螺旋部に平板状の傾斜板を用いたが、螺旋の一部を構成するものを用いてもよい。また、窓部を昇降ステップ側に設けてもよい。 The present invention is not limited to this embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, in the embodiment, a flat inclined plate is used for the spiral part, but a part constituting a part of the spiral may be used. Moreover, you may provide a window part in the raising / lowering step side.

１垂直導水管
２外筒部
３螺旋部
５分割外筒部
６分割螺旋部
７基本分割部
11 人孔用筒部
13 昇降用ステップ
14 窓部
21 傾斜板
26 円弧部
32 流入側分割部
33 円弧部
42 流出側分割部 DESCRIPTION OF SYMBOLS 1 Vertical water guide pipe 2 Outer cylinder part 3 Spiral part 5 Division | segmentation outer cylinder part 6 Division | segmentation spiral part 7 Basic division part
11 Human hole tube
13 Lifting step
14 Window
21 Inclined plate
26 Arc part
32 Inlet side division
33 Arc part
42 Outflow side division

Claims

In a spiral flow type vertical water conduit provided with an outer tube portion and a spiral portion provided inside the outer tube portion, a manhole tube portion is provided at the center of the spiral portion, and A vertical water guide pipe, wherein a lower part is closed, a visible window part is provided in the human hole cylinder part, and an elevating step is provided on an inner wall of the human hole cylinder part.

The vertical water conduit according to claim 1, wherein the window portion is provided below the lower surface of the spiral portion.

Forming a basic divided part comprising a divided outer cylinder part obtained by dividing the outer cylinder part in the length direction and a divided spiral part obtained by dividing the spiral part surrounding the human hole cylinder part in the circumferential direction; The vertical water conduit according to claim 1 or 2, wherein the basic divided portions are connected in the length direction.

The vertical water conduit according to claim 3, wherein the basic divided portions having the same shape are connected in a length direction.

5. The vertical water conduit according to claim 3, wherein the basic division portion includes a support portion along an outer side of the cylindrical portion for the human hole.