JP6755454B2

JP6755454B2 - Scum remover

Info

Publication number: JP6755454B2
Application number: JP2018195697A
Authority: JP
Inventors: 増田　智也; 智也増田; 米山　和彦; 和彦米山; 修史大塚
Original assignee: Aquaintec Corp
Current assignee: Aquaintec Corp
Priority date: 2018-10-17
Filing date: 2018-10-17
Publication date: 2020-09-16
Anticipated expiration: 2032-01-06
Also published as: JP2019005754A

Description

本発明は、沈殿池の水面に浮かぶスカムを除去するスカム除去装置に関する。 The present invention relates to a scum removing device for removing scum floating on the water surface of a sedimentation basin.

下水処理施設に設けられる沈殿池の水面には、浄化処理の妨げになるスカムが浮遊している。このため、このスカムを除去するスカム除去装置が沈殿池に設けられる場合がある。沈殿池の外部まで延在したトラフを備えたスカム除去装置では、スカムが混入したスカム混入水を、そのトラフから沈殿池の外部まで流し出すことで、沈殿池からスカムを除去する。このようなスカム除去装置には、スカム混入水のトラフへの流入を阻止したり許容するための堰部材が設けられたものがある。堰部材は、その上端部分が水面より上になる堰止め位置でスカム混入水を堰止める。そして、所定のタイミングで、堰部材は堰止め位置からその上端部分が水中にもぐった流入許容位置まで移動する。堰部材が流入許容位置まで移動すると、スカム混入水が堰部材の上端部分を乗り越えてトラフに流入する。このトラフに流入したスカム混入水は、トラフを通って沈殿池の外部に流された後、ポンプによって汲み上げられ、スカム混入水中のスカムを取り除く所定の処理が行われる。 Scum that interferes with purification treatment is floating on the water surface of the sedimentation basin installed in the sewage treatment facility. Therefore, a scum removing device for removing the scum may be provided in the settling basin. In the scum removing device equipped with a trough extending to the outside of the settling basin, scum mixed water containing scum is discharged from the trough to the outside of the settling basin to remove the scum from the settling basin. Some of such scum removing devices are provided with a weir member for blocking or allowing the inflow of scum mixed water into the trough. The weir member dams the scum mixed water at a weir position where the upper end thereof is above the water surface. Then, at a predetermined timing, the weir member moves from the weir stop position to the inflow allowable position where the upper end portion thereof goes into the water. When the weir member moves to the allowable inflow position, the scum mixed water gets over the upper end portion of the weir member and flows into the trough. The scum mixed water that has flowed into the trough is flowed to the outside of the settling basin through the trough, and then pumped up to perform a predetermined treatment for removing the scum in the scum mixed water.

ところで、堰部材を流入許容位置に固定した場合には、沈殿池の水位は一定ではなく変動するため、トラフに流入するスカム混入水の量が変動してしまう。トラフに流入するスカム混入水の量があまりに多いと、このスカム混入水を汲み上げるポンプの駆動負担やスカムを取り除く処理等の負担が大きくなってしまう。一方、トラフに流入するスカム混入水の量が少なすぎると、スカムの除去が不十分であることになる。このため、トラフに流入するスカム混入水の量を一定にすることが望まれる。従来では、堰部材を水位に追従させ、沈殿池の水位の変動にかかわらずトラフに流入するスカム混入水の量を一定にしようと試みたスカム除去装置が提案されている。このようなスカム除去装置として、たとえば特許文献１に記載されたものが知られている。 By the way, when the weir member is fixed at the allowable inflow position, the water level of the settling basin is not constant and fluctuates, so that the amount of scum mixed water flowing into the trough fluctuates. If the amount of scum mixed water flowing into the trough is too large, the burden of driving the pump for pumping the scum mixed water and the burden of removing the scum will increase. On the other hand, if the amount of scum mixed water flowing into the trough is too small, scum removal will be insufficient. Therefore, it is desirable to keep the amount of scum mixed water flowing into the trough constant. Conventionally, a scum removing device has been proposed in which a weir member is made to follow the water level and an attempt is made to keep the amount of scum mixed water flowing into the trough constant regardless of fluctuations in the water level of the settling basin. As such a scum removing device, for example, the one described in Patent Document 1 is known.

特許文献１に記載されたスカム除去装置は、下端部分がトラフに回転自在に取り付けられた堰部材と、この堰部材に連結された上下方向に延びたロッド部材と、このロッド部材に係合して、ロッド部材を引き下げる作動アームとを備えている。堰部材は、自身の浮力によって水位に追従し、その上端部が水面から所定距離上方になる堰止め位置に留まるように構成されている。作動アームは、所定のタイミングにおいて所定角度回転して、ロッド部材を所定距離引き下げるものである。この作動アームがロッド部材を引き下げることで、ロッド部材が連結された堰部材は、その上端部が水中にもぐった流入許容位置になる。このスカム除去装置では、作動アームがロッド部材を所定距離引き下げることで、流入許容位置における堰部材の上端部と水面との距離を一定にし、堰部材の上端部を乗り越えてトラフに流入するスカム混入水の量の均一化を実現しようとしている。 The scum removing device described in Patent Document 1 engages a weir member whose lower end portion is rotatably attached to a trough, a rod member connected to the weir member in the vertical direction, and the rod member. It also has an operating arm that pulls down the rod member. The weir member is configured to follow the water level by its own buoyancy and stay at a weir position whose upper end is above the water surface by a predetermined distance. The operating arm rotates a predetermined angle at a predetermined timing and pulls down the rod member by a predetermined distance. When the operating arm pulls down the rod member, the upper end of the weir member to which the rod member is connected becomes an inflow allowable position where the rod member is submerged in water. In this scum removing device, the operating arm pulls down the rod member by a predetermined distance to keep the distance between the upper end of the weir member and the water surface at the allowable inflow position constant, and the scum is mixed in over the upper end of the weir member and flows into the trough. We are trying to achieve a uniform amount of water.

特開平９−２９４９０２号公報Japanese Unexamined Patent Publication No. 9-294902

しかしながら、特許文献１の堰部材は、沈殿池の水位によって、堰止め位置における傾き角度が異なり、所定距離引き下げられたとしても、流入許容位置における傾き角度も異なってしまう。この流入許容位置における堰部材の傾き角度の違いにより、流入許容位置における堰部材の上端部と水面との距離が一定にならず、トラフへ流入するスカム混入水の量も変わってしまうという問題が生じる。また、堰部材を引き下げるために作動アームとロッド部材の係合等の複雑な構造を用いているため、この機構の動作精度などによって、流入許容位置における堰部材の上端部分から水面までの距離がばらつきやすいという問題もある。 However, the weir member of Patent Document 1 has a different inclination angle at the damming position depending on the water level of the settling basin, and even if the weir member is lowered by a predetermined distance, the inclination angle at the inflow allowable position also differs. Due to the difference in the inclination angle of the weir member at the allowable inflow position, the distance between the upper end of the weir member and the water surface at the allowable inflow position is not constant, and the amount of scum mixed water flowing into the trough also changes. Occurs. In addition, since a complicated structure such as engagement between the operating arm and the rod member is used to pull down the weir member, the distance from the upper end portion of the weir member to the water surface at the inflow allowable position depends on the operation accuracy of this mechanism. There is also the problem that it is easy to vary.

本発明は上記事情に鑑み、トラフに流入するスカム混入水の量を一定にすることができるスカム除去装置を提供することを目的とする。 In view of the above circumstances, an object of the present invention is to provide a scum removing device capable of keeping the amount of scum mixed water flowing into a trough constant.

上記目的を解決する本発明のスカム除去装置は、沈殿池の水面に浮かぶスカムが混入したスカム混入水が流入するトラフ、
前記トラフに流入しようとするスカム混入水を上端部分が前記水面よりも上になる堰止め位置で堰止め該トラフにスカム混入水が流入することを阻止する堰部材を有する堰止め機構、
前記堰部材に浮力を付与する浮力付与部材、および
前記堰止め機構に設けられた引当部に当接することで、前記堰部材を、前記上端部分が前記水面から所定長もぐった流入許容位置から前記堰止め位置まで引き上げる引上手段を備え、
前記堰部材は、前記流入許容位置では前記引当部が前記引上手段と離れた状態で前記浮力付与部材による浮力と前記堰止め機構全体の自重とのバランスによって前記水面の位置の変化に応じて回転することで該流入許容位置に留まることが可能なものである一方、該流入許容位置よりも前記堰止め位置にある時間の方が長いものであり、
前記水面の高さ位置が変化しても前記堰部材が前記流入許容位置に留まっている間は前記引当部が前記引上手段と離れた状態を維持することを特徴とする。
また、前記浮力付与部材は、前記堰部材と別体で取り替え可能なものであってもよい。
また、沈殿池の水面に浮かぶスカムが混入したスカム混入水が流入するトラフ、
前記トラフに流入しようとするスカム混入水を上端部分が前記水面よりも上になる堰止め位置で堰止め該トラフにスカム混入水が流入することを阻止する堰部材を有する堰止め機構、
前記堰部材に浮力を付与する浮力付与部材、および
前記堰部材を、前記上端部分が前記水面から所定長もぐった流入許容位置から前記堰止め位置まで引き上げる引上手段を備え、
前記堰部材は、前記流入許容位置がホームポジションであり、該流入許容位置では前記浮力付与部材による浮力と前記堰止め機構全体の自重とのバランスによって前記水面の位置の変化に応じて回転することで該流入許容位置に留まることが可能なものである一方、該流入許容位置よりも前記堰止め位置にある時間の方が長いものであることを特徴とするスカム除去装置であってもよい。 The scum removing device of the present invention that solves the above object is a trough in which scum mixed water containing scum floating on the water surface of a settling basin flows in.
A weir mechanism having a weir member that blocks the scum mixed water that is about to flow into the trough at a weir position where the upper end portion is above the water surface and prevents the scum mixed water from flowing into the trough.
A buoyancy-imparting member that imparts buoyancy to the weir member, and
The weir member is provided with a pulling means for pulling up the weir member from an inflow allowable position where the upper end portion has passed a predetermined length from the water surface to the damming position by contacting with an allocation portion provided in the weiring mechanism.
At the inflow allowable position, the weir member responds to a change in the position of the water surface by balancing the buoyancy of the buoyancy-imparting member and the weight of the entire weir blocking mechanism while the reserve portion is separated from the pulling means. While it is possible to stay in the inflow allowable position by rotating, the time in the damming position is longer than the inflow allowable position.
Even if the height position of the water surface changes, the reserve portion is maintained in a state of being separated from the pulling means while the weir member remains at the inflow allowable position.
Further, the buoyancy imparting member may be a member that can be replaced separately from the weir member.
In addition, a trough in which scum mixed water containing scum floating on the water surface of the sedimentation basin flows in.
A weir mechanism having a weir member that blocks the scum mixed water that is about to flow into the trough at a weir position where the upper end portion is above the water surface and prevents the scum mixed water from flowing into the trough.
A buoyancy imparting member that imparts buoyancy to the weir member, and a pulling means for pulling the weir member from an inflow allowable position where the upper end portion has passed a predetermined length from the water surface to the damming position are provided.
The weir member has a home position at the allowable inflow position, and at the allowable inflow position, the weir member rotates in response to a change in the position of the water surface due to a balance between the buoyancy of the buoyancy imparting member and the weight of the entire weir blocking mechanism. The scum removing device may be characterized in that it is possible to stay at the inflow allowable position, while the time at the damming position is longer than the inflow allowable position.

本発明のスカム除去装置において、前記堰部材は、前記トラフに対して接離する方向に回転するものであってもよい。 In the scum removing device of the present invention, the weir member may rotate in a direction of contacting and separating from the trough.

また、本発明のスカム除去装置において、前記堰部材は、回転することで、前記流入許容位置から前記堰止め位置に変化するとともに該堰止め位置から該流入許容位置にも変化するものであってもよい。 Further, in the scum removing device of the present invention, the weir member changes from the inflow allowable position to the damming position and also changes from the damming position to the inflow allowable position by rotating. May be good.

本発明のスカム除去装置によれば、トラフに流入するスカム混入水の量を一定にすることができる。 According to the scum removing device of the present invention, the amount of scum mixed water flowing into the trough can be kept constant.

本発明の一実施形態であるスカム除去装置が設置された沈殿池の一例を示す断面図である。It is sectional drawing which shows an example of the settling basin which installed the scum removal device which is one Embodiment of this invention. 図１のＡ部に示すスカム除去装置を拡大して示したＡ部拡大図である。FIG. 5 is an enlarged view of part A showing an enlarged view of the scum removing device shown in part A of FIG. 図２に示すスカム除去装置の平面図である。It is a top view of the scum removing device shown in FIG. 図２に示すスカム除去装置の拡大断面図である。It is an enlarged sectional view of the scum removing device shown in FIG. 図２に示すスカム除去装置の堰部材が、堰止め位置に留まっている状態を示す図である。It is a figure which shows the state which the weir member of the scum removal device shown in FIG. 2 stays in the weir stop position.

以下、図面を参照して本発明の実施の形態を説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の一実施形態であるスカム除去装置１が設置された沈殿池９の一例を示す断面図である。 FIG. 1 is a cross-sectional view showing an example of a settling basin 9 in which a scum removing device 1 according to an embodiment of the present invention is installed.

以下、図１における左方向を上流側と称し、図１における右方向を下流側と称することがある。また、図１における紙面と直交する方向を池幅方向と称することがある。 Hereinafter, the left direction in FIG. 1 may be referred to as an upstream side, and the right direction in FIG. 1 may be referred to as a downstream side. Further, the direction orthogonal to the paper surface in FIG. 1 may be referred to as a pond width direction.

図１に示す沈殿池９は、一対の側壁９ａと、上流壁９ｂと、下流壁９ｃによって囲まれている。この沈殿池９は、平面視で略長方形状をした池である。沈殿池９は、図１において上流側から沈殿池９に流入した水に含まれる汚泥やスカムを取り除くためのものである。汚泥とスカムが取り除かれた水は、図１において下流側に配置された排水樋９４を通って図示しない排水路に流れ、沈殿池９の外部に排水される。 The settling basin 9 shown in FIG. 1 is surrounded by a pair of side walls 9a, an upstream wall 9b, and a downstream wall 9c. The sedimentation basin 9 is a pond having a substantially rectangular shape in a plan view. The settling basin 9 is for removing sludge and scum contained in the water flowing into the settling basin 9 from the upstream side in FIG. The water from which sludge and scum have been removed flows through a drainage gutter 94 arranged on the downstream side in FIG. 1 to a drainage channel (not shown) and is drained to the outside of the sedimentation basin 9.

この沈殿池９には、スカム除去装置１と、汚泥掻寄機９３と、排水樋９４と、汚泥ピット９５が設けられている。汚泥掻寄機９３は、沈殿池９の池幅方向両端部に設けられ、沈殿池９内を循環運動する一対のチェーン９３１と、その一対のチェーン９３１の間に掛け渡された複数のフライト板９３２と、各チェーン９３１毎に４つ配置されたスプロケット９３３を備えている。スプロケット９３３のうちの一つは、図示しないモータによって図１において時計回りに回転駆動されている。チェーン９３１は、スプロケット９３３の回転に伴って図１において時計回りに回転している。フライト板９３２も、チェーン９３１とともに図１において時計回りに回転している。沈殿池９の池底部に沈殿した汚泥は、沈殿池９の池底部近傍において沈殿池９の上流方向に移動しているフライト板９３２によって汚泥ピット９５に掻き寄せられる。汚泥ピット９５に掻き寄せられた汚泥は、図示しない汚泥ポンプによって沈殿池９の外部に排出される。また、沈殿池９の水面Ｗの近傍で、沈殿池９の下流側に移動しているフライト板９３２は、上端部が水面から突出し、下端部が水中に没している。沈殿池９の水面Ｗに浮かんだスカムは、沈殿池９の水面Ｗ近傍にあるフライト板９３２によって後述する堰部材３１に向けて移送される。 The settling basin 9 is provided with a scum removing device 1, a sludge scraper 93, a drain gutter 94, and a sludge pit 95. The sludge scraper 93 is provided at both ends of the settling basin 9 in the pond width direction, and is a pair of chains 931 that circulate in the settling basin 9 and a plurality of flight plates that are hung between the pair of chains 931. It includes a 932 and four sprockets 933 arranged for each chain 931. One of the sprockets 933 is rotationally driven clockwise in FIG. 1 by a motor (not shown). The chain 931 rotates clockwise in FIG. 1 as the sprocket 933 rotates. The flight plate 932 also rotates clockwise in FIG. 1 together with the chain 931. The sludge settled at the bottom of the settling basin 9 is attracted to the sludge pit 95 by the flight plate 932 moving in the upstream direction of the settling basin 9 near the bottom of the settling basin 9. The sludge attracted to the sludge pit 95 is discharged to the outside of the settling basin 9 by a sludge pump (not shown). Further, in the flight plate 932 moving to the downstream side of the settling basin 9 near the water surface W of the settling basin 9, the upper end portion protrudes from the water surface and the lower end portion is submerged in water. The scum floating on the water surface W of the settling basin 9 is transferred toward the weir member 31 described later by the flight plate 932 near the water surface W of the settling basin 9.

図２は、図１のＡ部に示すスカム除去装置を拡大して示したＡ部拡大図である。また、図３は、図２に示すスカム除去装置の平面図である。 FIG. 2 is an enlarged view of a part A showing an enlarged view of the scum removing device shown in the part A of FIG. Further, FIG. 3 is a plan view of the scum removing device shown in FIG.

図２に示すように、スカム除去装置１は、堰部材３１を有する堰止め機構３と、トラフ５と、堰部材３１を引き上げる引上手段としての引上機構７を備えている。この図２では、堰止め位置にある堰部材３１を実線で示し、そのときの引上機構７も実線で示している。一方、流入許容位置にある堰部材３１を二点鎖線で示し、そのときの引上機構７も二点鎖線で示している。 As shown in FIG. 2, the scum removing device 1 includes a weir stopping mechanism 3 having a weir member 31, a trough 5, and a pulling mechanism 7 as a pulling means for pulling up the weir member 31. In FIG. 2, the weir member 31 at the weir stop position is shown by a solid line, and the pulling mechanism 7 at that time is also shown by a solid line. On the other hand, the weir member 31 at the inflow allowable position is indicated by the alternate long and short dash line, and the pulling mechanism 7 at that time is also indicated by the alternate long and short dash line.

トラフ５は、上流側側板５ａと、下流側側板５ｂと、上流側側板５ａと下流側側板５ｂを繋ぐ底板５ｃを備えている。また、図３に示すように、トラフ５は、池幅方向の左側端部に池幅方向側側板５ｄを備え、トラフ５の池幅方向の右側端部は開放されてトラフ５に流入したスカム混入水を沈殿池の外部に設けられた図示しないスカムピットに流す流路５２が設けられている。なお、図２に示す上流側側板５ａは、その上端部分が上流側に傾斜している。図３に示すトラフ５は、沈殿池９の池幅方向に延在しており、その池幅方向両端部が一対の取付部材５１によって沈殿池９の側壁９ａにそれぞれ固定されている。トラフ５の底板５ｃは、図示しないスカムピットに向かってほんの少し下方に傾斜している。 The trough 5 includes an upstream side plate 5a, a downstream side plate 5b, and a bottom plate 5c connecting the upstream side plate 5a and the downstream side plate 5b. Further, as shown in FIG. 3, the trough 5 is provided with a side plate 5d in the pond width direction at the left end in the pond width direction, and the scum in which the right end in the pond width direction of the trough 5 is opened and flows into the trough 5. A flow path 52 is provided to allow the mixed water to flow into a scum pit (not shown) provided outside the settling basin. The upper end of the upstream side plate 5a shown in FIG. 2 is inclined to the upstream side. The trough 5 shown in FIG. 3 extends in the pond width direction of the settling basin 9, and both ends in the pond width direction are fixed to the side wall 9a of the settling basin 9 by a pair of mounting members 51. The bottom plate 5c of the trough 5 is tilted slightly downward toward a scum pit (not shown).

図２および図３に示すように、堰止め機構３は、堰部材３１と、堰部材３１とトラフ５を接続する接続部材３２と、フロート３３と、堰部材３１に取り付けられたアーム部材３４と、アーム部材３４に回転自在に連結されたロッド部材３５を備えている。 As shown in FIGS. 2 and 3, the weir blocking mechanism 3 includes a weir member 31, a connecting member 32 connecting the weir member 31 and the trough 5, a float 33, and an arm member 34 attached to the weir member 31. , A rod member 35 rotatably connected to the arm member 34 is provided.

接続部材３２は、シール部材３２１と、側板３２２と、ヒンジ３２３を有する。また、シール部材３２１は、底面部分３２１ａと、その底面部分３２１ａの池幅方向両端部に設けられた一対の側面部分３２１ｂを備えている。なお、図２では紙面と直交する方向が池幅方向になる。シール部材３２１の底面部分３２１ａにおける下流側の端部は、接合部分から水が進入できないようにトラフ５の上流側側板５ａにおける上流側に傾斜した部分に接着されている。また、シール部材３２１の側面部分３２１ｂにおける下流側の端部は、接着部分から水が進入できないようにトラフ５に接着されている。このシール部材３２１は、ゴム製のシート材で構成されている。なお、シール部材３２１を構成する部材は、軟性を有するシート材であればよく、たとえばビニル樹脂製のシート材であってもよい。 The connecting member 32 has a seal member 321, a side plate 322, and a hinge 323. Further, the seal member 321 includes a bottom surface portion 321a and a pair of side surface portions 321b provided at both ends of the bottom surface portion 321a in the pond width direction. In FIG. 2, the direction orthogonal to the paper surface is the pond width direction. The downstream end of the bottom surface portion 321a of the seal member 321 is adhered to an upstreamly inclined portion of the upstream side plate 5a of the trough 5 so that water cannot enter from the joint portion. Further, the downstream end portion of the side surface portion 321b of the seal member 321 is adhered to the trough 5 so that water cannot enter from the adhesive portion. The seal member 321 is made of a rubber sheet material. The member constituting the seal member 321 may be any sheet material having softness, and may be, for example, a sheet material made of vinyl resin.

堰部材３１は、金属製の板材で形成され、図２において、下流側の斜め下方が開放した略コの字形状をしたコ字状部分３１ｂと、そのコ字状部分３１ｂから下流側に突出した平板部分３１ｃを備えている。コ字状部分３１ｂの下流側の角部が堰部材３１の上端部分３１ａになる。また、堰部材３１の池幅方向両端部は、一対の金属製の側板３２２に溶接によって接合されている。なお、堰部材３１と側板３２２を、たとえば一枚の金属板を曲げ加工することで一体に形成してもよい。 The weir member 31 is made of a metal plate, and in FIG. 2, a substantially U-shaped portion 31b having an open diagonally downward side on the downstream side and a U-shaped portion 31b protruding downstream from the U-shaped portion 31b. It is provided with a flat plate portion 31c. The corner on the downstream side of the U-shaped portion 31b becomes the upper end portion 31a of the weir member 31. Further, both ends of the weir member 31 in the pond width direction are joined to a pair of metal side plates 322 by welding. The weir member 31 and the side plate 322 may be integrally formed by, for example, bending a single metal plate.

シール部材３２１の側面部分３２１ｂにおける上流側の端部は、接着部分から水が進入できないように側板３２２に接着されている。また、シール部材３２１の底面部分３２１ａにおける上流側の端部は、接続部分から水が進入できないように堰部材３１の平板部分３１ｃに接着されている。堰部材３１の平板部分３１ｃは、ヒンジ３２３によって回転自在にトラフ５に取り付けられている。このヒンジ３２３は、シール部材３２１の底面部分３２１ａを挟み込むように、堰部材３１の平板部分３１ｃとトラフ５の上流側側板５ａに図示しないボルトで固定されている。なお、ヒンジ３２３は、図３に示すように、池幅方向に所定間隔をあけて複数（図３では４つ）設けられている。また、シール部材３２１の側面部分３２１ｂは、堰部材３１の回転動作を妨げないように外側に円弧状に張り出している。なお、この側面部分３２１ｂをジャバラ状に折りたたむ構成としてもよい。 The upstream end of the side surface portion 321b of the seal member 321 is adhered to the side plate 322 so that water cannot enter from the adhesive portion. Further, the upstream end portion of the bottom surface portion 321a of the seal member 321 is adhered to the flat plate portion 31c of the weir member 31 so that water cannot enter from the connecting portion. The flat plate portion 31c of the weir member 31 is rotatably attached to the trough 5 by a hinge 323. The hinge 323 is fixed to the flat plate portion 31c of the weir member 31 and the upstream side plate 5a of the trough 5 with bolts (not shown) so as to sandwich the bottom surface portion 321a of the seal member 321. As shown in FIG. 3, a plurality of hinges 323 (four in FIG. 3) are provided at predetermined intervals in the pond width direction. Further, the side surface portion 321b of the seal member 321 projects outward in an arc shape so as not to interfere with the rotational operation of the weir member 31. The side surface portion 321b may be folded into a bellows shape.

側板３２２の池幅方向における外側の面には、浮力付与部材としての角柱形状のフロート３３がそれぞれ取り付けられている。このフロート３３は、例えば、発泡スチロールで構成され、堰部材３１に浮力を付与するものである。本実施形態では、堰部材３１は、外部からの力が付与されなければ、このフロート３３による浮力と堰止め機構３全体の自重とのバランスによって、堰部材３１の上端部分３１ａが水面Ｗから所定長もぐった流入許容位置に留まるように設計されている。すなわち、堰部材３１の機能からみると、堰止め位置が堰部材３１のホームポジションになるが、堰部材３１の浮力と堰止め機構３全体の自重とのバランスからみると、流入許容位置が、外部から力が付与されない場合の堰部材３１のホームポジションに相当する。堰部材３１は、外部からの力に抗して流入許容位置に戻ろうとするものである。 A prismatic float 33 as a buoyancy imparting member is attached to the outer surface of the side plate 322 in the pond width direction. The float 33 is made of styrofoam, for example, and imparts buoyancy to the weir member 31. In the present embodiment, if no external force is applied to the weir member 31, the upper end portion 31a of the weir member 31 is determined from the water surface W by the balance between the buoyancy of the float 33 and the own weight of the entire weiring mechanism 3. It is designed to stay in a long and permissible inflow position. That is, from the viewpoint of the function of the weir member 31, the damming position is the home position of the weir member 31, but from the viewpoint of the balance between the buoyancy of the weir member 31 and the own weight of the damming mechanism 3 as a whole, the allowable inflow position is determined. This corresponds to the home position of the weir member 31 when no force is applied from the outside. The weir member 31 tries to return to the inflow allowable position against the force from the outside.

堰部材３１の平板部分３１ｃにおける上流側の面には、金属製のアーム部材３４が取り付けられている。アーム部材３４は、堰部材３１の平板部分３１ｃにおける上流側の面に固定された当板３４１と、この当板３４１の池幅方向（図２では紙面と直交する方向）に併設され上流側に延びた一対のアーム本体３４２を有する。一対のアーム本体３４２の上流側には、それぞれ孔部３４２ａが形成されている。なお、図２では、紙面手前側に位置するアーム本体３４２が示されている。また、堰部材３１のコ字状部分３１ｂにおける一対のアーム本体３４２と干渉する箇所には、アーム本体３４２がはまり込むための図示しない切り欠きが形成されている。 A metal arm member 34 is attached to the upstream surface of the flat plate portion 31c of the weir member 31. The arm member 34 is provided on the upstream side of the plate portion 341 fixed to the upstream surface of the flat plate portion 31c of the weir member 31 in the pond width direction of the plate 341 (in the direction orthogonal to the paper surface in FIG. 2). It has a pair of extended arm bodies 342. Holes 342a are formed on the upstream sides of the pair of arm bodies 342, respectively. In addition, in FIG. 2, the arm main body 342 located on the front side of the paper surface is shown. Further, a notch (not shown) for fitting the arm body 342 is formed in a portion of the weir member 31 that interferes with the pair of arm bodies 342 in the U-shaped portion 31b.

アーム部材３４には、回転自在に金属製のロッド部材３５が連結されている。ロッド部材３５は、一対のアーム本体３４２の孔部３４２ａに回転自在に通された軸部３５１と、この軸部３５１に取り付けられ上下方向に延びたロッド本体３５２を備えている。このロッド本体３５２にはネジ切り加工が施されており、ロッド本体３５２の上側部分には、ボルトからなる引当部３５３が取り付けられ、ロッド本体３５２のやや下側部分にボルトからなる押受部３５４が取り付けられている。なお、引当部３５３と押受部３５４のロッド本体３５２における上下方向の位置は、調整することができる。 A metal rod member 35 is rotatably connected to the arm member 34. The rod member 35 includes a shaft portion 351 rotatably passed through a hole portion 342a of a pair of arm main bodies 342, and a rod main body 352 attached to the shaft portion 351 and extending in the vertical direction. The rod body 352 is threaded, an allocation portion 353 made of bolts is attached to the upper part of the rod body 352, and a pressing part 354 made of bolts is attached to a slightly lower part of the rod body 352. Is installed. The vertical positions of the allocation portion 353 and the pressing portion 354 on the rod body 352 can be adjusted.

図３に示すように、ロッド部材３５は、スカム除去装置１の池幅方向における左側に配置されている。なお、このロッド部材３５には、回転自在にアーム部材３４が連結されているが、図３では省略している。 As shown in FIG. 3, the rod member 35 is arranged on the left side of the scum removing device 1 in the pond width direction. Although the arm member 34 is rotatably connected to the rod member 35, it is omitted in FIG.

引上機構７は、支点部材７１と、天秤部材７２と、引上アーム７３と、ストッパ部材７４を備えている。 The pulling mechanism 7 includes a fulcrum member 71, a balance member 72, a pulling arm 73, and a stopper member 74.

図２に示す支点部材７１は、軸部７１１と、この軸部７１１に一体化された、断面が正方形状のフレーム７１２を備えている。図３に示す支点部材７１は池幅方向に延び、軸部７１１の池幅方向両端部が、トラフ５の池幅方向両側に立設された図示しない一対の支持部材に回転自在に取り付けられている。これにより、支点部材７１が、トラフ５から所定距離上方に回転自在に支持されている。この支点部材７１の軸部７１１の中心が支点になる。 The fulcrum member 71 shown in FIG. 2 includes a shaft portion 711 and a frame 712 having a square cross section integrated with the shaft portion 711. The fulcrum member 71 shown in FIG. 3 extends in the pond width direction, and both ends of the shaft portion 711 in the pond width direction are rotatably attached to a pair of support members (not shown) erected on both sides of the trough 5 in the pond width direction. There is. As a result, the fulcrum member 71 is rotatably supported upward by a predetermined distance from the trough 5. The center of the shaft portion 711 of the fulcrum member 71 serves as a fulcrum.

図３に示す天秤部材７２は、金属製の角パイプで構成された２本の天秤アーム７２１と、２つの重り７２２と、金属製の貯水タンク７２３を備えている。天秤アーム７２１は、上流側から下流側に向かう方向に沿って配置され、下流側部７２１ａと、上流側部７２１ｂを有する。図２に示す上流側部７２１ｂは、下流側部７２１ａに対して、上方に傾斜するように折曲して形成されている。また、図３に示すように、２本の天秤アーム７２１は、スカム除去装置１の池幅方向中央から左右外側に向かって、それぞれ所定距離離れた位置に配置されている。天秤アーム７２１は、その下流側部７２１ａの下面が支点部材７１のフレーム７１２に溶接により固定され、支点部材７１が回転することで天秤アーム７２１も回転する。また、天秤アーム７２１には、下流側部７２１ａにおける下流側よりに重り７２２が取り付けられている。図３に示す貯水タンク７２３は、２本の天秤アーム７２１に掛け渡され、図２に示す貯水タンク７２３は、上流側部７２１ｂの下面に溶接されて固定されている。図３に示す貯水タンク７２３には、その上面における池幅方向中央に、注水口７２３ａが設けられている。この注水口７２３ａは、電動弁を備えた図示しない配管が接続され、この配管から下水処理場で処理を施した水が供給される。貯水タンク７２３は、図示しない小孔が下部に設けられている。この小孔は、貯水タンク７２３内の水を少量づつ排出するためのものである。このため、貯水タンク７２３は配管からの水の供給や小孔からの水の排出によって内部に貯まる水の量が変わり、これによって貯水タンク７２３の重量が変化する。すなわち、貯水タンク７２３は、重量変化部材に相当する。 The balance member 72 shown in FIG. 3 includes two balance arms 721 made of a metal square pipe, two weights 722, and a metal water storage tank 723. The balance arm 721 is arranged along the direction from the upstream side to the downstream side, and has a downstream side portion 721a and an upstream side portion 721b. The upstream side portion 721b shown in FIG. 2 is formed by bending so as to incline upward with respect to the downstream side portion 721a. Further, as shown in FIG. 3, the two balance arms 721 are arranged at positions separated by a predetermined distance from the center of the scum removing device 1 in the pond width direction toward the left and right outside. The lower surface of the downstream side portion 721a of the balance arm 721 is fixed to the frame 712 of the fulcrum member 71 by welding, and the balance arm 721 also rotates when the fulcrum member 71 rotates. Further, a weight 722 is attached to the balance arm 721 from the downstream side of the downstream side portion 721a. The water storage tank 723 shown in FIG. 3 is hung on two balance arms 721, and the water storage tank 723 shown in FIG. 2 is welded and fixed to the lower surface of the upstream side portion 721b. The water storage tank 723 shown in FIG. 3 is provided with a water injection port 723a at the center in the pond width direction on the upper surface thereof. A pipe (not shown) provided with an electric valve is connected to the water injection port 723a, and water treated at the sewage treatment plant is supplied from this pipe. The water storage tank 723 is provided with a small hole (not shown) at the bottom. This small hole is for discharging the water in the water storage tank 723 little by little. Therefore, the amount of water stored in the water storage tank 723 changes depending on the supply of water from the pipe and the discharge of water from the small holes, and the weight of the water storage tank 723 changes accordingly. That is, the water storage tank 723 corresponds to the weight changing member.

図３に示すように、引上アーム７３は、スカム除去装置１の池幅方向における左側に設けられている。引上アーム７３は、金属製の角パイプで構成された基部７３１と、この基部７３１の上流側に形成された金属製の挿通部７３２を備えている。なお、図２では、基部７３１の大部分が天秤アーム７２１の下流側部７２１ａに隠れており、基部７３１の下流側端部７３１ａを点線で示している。図３に示すように、挿通部７３２は、上流側が開放した平面視コ字形状に形成されている。また、図２に示すように、挿通部７３２の内側にロッド部材３５のロッド本体３５２が挿通されている。なお、挿通部７３２を、平面視コ字形状の部材の代わりに、上下方向に貫通する長孔を有する部材で構成し、この長孔にロッド部材３５のロッド本体３５２を挿通させてもよい。また、図２に示す引上アーム７３は、その基部７３１の下面が支点部材７１のフレーム７１２に溶接により固定され、支点部材７１が回転することで天秤アーム７２１とともに引上アーム７３も回転する。図２では、ロッド部材３５の引当部３５３の下面が、挿通部７３２の上面に当接しており、ロッド部材３５が所定高さに支持されている。これにより、ロッド部材３５に連結されたアーム部材３４を介して堰部材３１が引き上げられた状態が維持され、堰部材３１の上端部分３１ａが水面より上になっている。すなわち、堰部材３１は、トラフ５に流入しようとするスカム混入水を堰止める堰止め位置になっている。 As shown in FIG. 3, the pulling arm 73 is provided on the left side of the scum removing device 1 in the pond width direction. The pull-up arm 73 includes a base portion 731 made of a metal square pipe and a metal insertion portion 732 formed on the upstream side of the base portion 731. In FIG. 2, most of the base portion 731 is hidden by the downstream side portion 721a of the balance arm 721, and the downstream end portion 731a of the base portion 731 is shown by a dotted line. As shown in FIG. 3, the insertion portion 732 is formed in a U-shape in a plan view with the upstream side open. Further, as shown in FIG. 2, the rod body 352 of the rod member 35 is inserted inside the insertion portion 732. The insertion portion 732 may be formed of a member having an elongated hole penetrating in the vertical direction instead of the U-shaped member in a plan view, and the rod body 352 of the rod member 35 may be inserted through the elongated hole. Further, in the pulling arm 73 shown in FIG. 2, the lower surface of the base portion 731 is fixed to the frame 712 of the fulcrum member 71 by welding, and the rotation of the fulcrum member 71 causes the pulling arm 73 to rotate together with the balance arm 721. In FIG. 2, the lower surface of the allocation portion 353 of the rod member 35 is in contact with the upper surface of the insertion portion 732, and the rod member 35 is supported at a predetermined height. As a result, the state in which the weir member 31 is pulled up via the arm member 34 connected to the rod member 35 is maintained, and the upper end portion 31a of the weir member 31 is above the water surface. That is, the weir member 31 is in a weir position for blocking the scum mixed water that is about to flow into the trough 5.

ストッパ部材７４は、図２に示す取付部７４１と、上側ストッパ７４２と、下側ストッパ７４３と、図３に示す支持部７４４を備えている。図３に示す支持部７４４は一端がトラフ５に固定され、他端が引上アーム７３近傍まで池幅方向に延びている。この支持部７４４の他端に図２に示す取付部７４１が固定されている。図２に示す取付部７４１の上側には上側取付片７４１ａが形成され、取付部７４１の下側には下側取付片７４１ｂが形成されている。この上側取付片７４１ａと下側取付片７４１ｂは、引上アーム７３側（図２では紙面手前側）に突出し、上側取付片７４１ａに上側ストッパ７４２が取り付けられ、下側取付片７４１ｂに下側ストッパ７４３が取り付けられている。これらの上側ストッパ７４２と下側ストッパ７４３の間に引上アーム７３が位置している。上側ストッパ７４２と下側ストッパ７４３は、ボルトとナットを備え、上下方向の位置が調整自在である。なお、図２では、下側ストッパ７４３は、その上端部７４３ａが、支点部材７１のフレーム７１２の上面と同じ高さになるように設定されている。図２では、引上アーム７３の基部７３１が、下側ストッパ７４３の上端部７４３ａに当接している。このため、引上機構７は支点部材７１を支点にこれ以上時計回りに回転せず、図２に示すように、基部７３１が水平姿勢を保っている。なお、引上アーム７３が支点部材７１を支点に反時計回りに回転すると、引上アーム７３の基部７３１が上側ストッパ７４２の下端部７４２ａに当接し、引上機構７はそれ以上反時計回りに回転しない。（図２に示す二点鎖線の引上機構７参照）
続いて、図２を用いて、堰部材３１が、堰止め位置から堰部材３１の上端部分３１ａが水面Ｗから所定長もぐった流入許容位置へ移動し、再び、堰止め位置に戻る動作について説明する。 The stopper member 74 includes a mounting portion 741 shown in FIG. 2, an upper stopper 742, a lower stopper 743, and a support portion 744 shown in FIG. One end of the support portion 744 shown in FIG. 3 is fixed to the trough 5, and the other end extends in the pond width direction to the vicinity of the pulling arm 73. The mounting portion 741 shown in FIG. 2 is fixed to the other end of the support portion 744. An upper mounting piece 741a is formed on the upper side of the mounting portion 741 shown in FIG. 2, and a lower mounting piece 741b is formed on the lower side of the mounting portion 741. The upper mounting piece 741a and the lower mounting piece 741b project toward the pulling arm 73 side (the front side of the paper in FIG. 2), the upper stopper 742 is attached to the upper mounting piece 741a, and the lower stopper is attached to the lower mounting piece 741b. 743 is attached. The pull-up arm 73 is located between the upper stopper 742 and the lower stopper 743. The upper stopper 742 and the lower stopper 743 are provided with bolts and nuts, and their positions in the vertical direction can be adjusted. In FIG. 2, the lower stopper 743 is set so that its upper end portion 743a is at the same height as the upper surface of the frame 712 of the fulcrum member 71. In FIG. 2, the base portion 731 of the pull-up arm 73 is in contact with the upper end portion 743a of the lower stopper 743. Therefore, the pulling mechanism 7 does not rotate clockwise any more with the fulcrum member 71 as a fulcrum, and as shown in FIG. 2, the base portion 731 maintains a horizontal posture. When the pulling arm 73 rotates counterclockwise with the fulcrum member 71 as a fulcrum, the base portion 731 of the pulling arm 73 comes into contact with the lower end portion 742a of the upper stopper 742, and the pulling mechanism 7 further turns counterclockwise. Does not rotate. (See the two-dot chain line pulling mechanism 7 shown in FIG. 2)
Subsequently, with reference to FIG. 2, the operation of the weir member 31 moving from the weiring position to the inflow allowable position where the upper end portion 31a of the weir member 31 has passed from the water surface W by a predetermined length and returning to the weiring position will be described. To do.

上述のごとく、図２では、堰部材３１が堰止め位置になる状態の、堰止め機構３と引上機構７を実線で示している。この状態では、支点部材７１を基準にして、引上機構７には貯水タンク７２３側の回転モーメントよりも大きな回転モーメントが重り７２２側に生じている。以下、支点部材７１を基準にして、引上機構７の貯水タンク７２３側に生じる回転モーメントを貯水タンク側回転モーメントと称し、引上機構７の重り７２２側に生じる回転モーメントを重り側回転モーメントと称する。本実施形態では、貯水タンク側回転モーメントは、主として、堰部材３１、側板３２２、アーム部材３４、ロッド部材３５、貯水タンク７２３、および天秤アーム７２１と引上アーム７３における支点部材７１よりも上流側の部分の重量によって生じる回転モーメントから、フロート３３によって生じる浮力を除いた力である。一方、重り側回転モーメントは、重り７２２、および天秤アーム７２１と引上アーム７３における支点部材７１よりも下流側の部分の重量によって生じる回転モーメントになる。重り７２２の重量は、貯水タンク７２３内に水がない状態から所定量の水が貯まるまでの間において、貯水タンク側回転モーメントよりも重り側回転モーメントの方が大きくなるように設定されている。堰部材３１が堰止め位置になる状態では、貯水タンク７２３に水が供給されていないか、或いは貯水タンク７２３内の水の量が、重り側回転モーメントよりも貯水タンク側回転モーメントの方が大きくなる上述した所定量未満である。このため、引上機構７に支点部材７１を支点として時計回りの回転モーメントが生じ、引上アーム７３の基部７３１の下面がストッパ部材７４における下側ストッパ７４３の上端部７４３ａに当接した状態で引上機構７の反時計回りの回転は停止する。引上アーム７３は略水平な姿勢になる。また、ロッド部材３５の引当部３５３の下面が引上アーム７３の挿通部７３２の上面に当接している。これにより、ロッド部材３５が引上アーム７３に支持され、ロッド部材３５の下端に連結したアーム部材３４とともに堰部材３１が引き上げられた状態になり、堰部材３１の上端部分３１ａが水面Ｗよりも上になった堰止め位置になる。 As described above, in FIG. 2, the weir mechanism 3 and the pulling mechanism 7 in a state where the weir member 31 is in the weir position are shown by solid lines. In this state, with reference to the fulcrum member 71, a rotational moment larger than the rotational moment on the water storage tank 723 side is generated on the weight 722 side in the pulling mechanism 7. Hereinafter, the rotational moment generated on the water storage tank 723 side of the pulling mechanism 7 is referred to as the water storage tank side rotational moment with reference to the fulcrum member 71, and the rotational moment generated on the weight 722 side of the pulling mechanism 7 is referred to as the weight side rotational moment. Refer to. In the present embodiment, the rotational moment on the water storage tank side is mainly on the upstream side of the weir member 31, the side plate 322, the arm member 34, the rod member 35, the water storage tank 723, and the fulcrum member 71 in the balance arm 721 and the pulling arm 73. It is a force obtained by removing the buoyancy generated by the float 33 from the rotational moment generated by the weight of the portion. On the other hand, the weight-side rotational moment is a rotational moment generated by the weight of the weight 722 and the portion of the balance arm 721 and the pull-up arm 73 on the downstream side of the fulcrum member 71. The weight of the weight 722 is set so that the rotation moment on the weight side is larger than the rotation moment on the water storage tank side from the state where there is no water in the water storage tank 723 until a predetermined amount of water is stored. In the state where the weir member 31 is in the weiring position, water is not supplied to the water storage tank 723, or the amount of water in the water storage tank 723 is larger in the water storage tank side rotation moment than in the weight side rotation moment. It is less than the above-mentioned predetermined amount. Therefore, a clockwise rotational moment is generated in the pulling mechanism 7 with the fulcrum member 71 as a fulcrum, and the lower surface of the base portion 731 of the pulling arm 73 is in contact with the upper end portion 743a of the lower stopper 743 in the stopper member 74. The counterclockwise rotation of the pulling mechanism 7 is stopped. The pull-up arm 73 is in a substantially horizontal position. Further, the lower surface of the allocation portion 353 of the rod member 35 is in contact with the upper surface of the insertion portion 732 of the pulling arm 73. As a result, the rod member 35 is supported by the pulling arm 73, the weir member 31 is pulled up together with the arm member 34 connected to the lower end of the rod member 35, and the upper end portion 31a of the weir member 31 is higher than the water surface W. It will be the upper dam position.

図示しない配管から貯水タンク７２３の注水口７２３ａに水の供給を開始すると、貯水タンク７２３内の水の量が増加し、貯水タンク７２３の重量が増すことで、貯水タンク側回転モーメントも大きくなる。なお、図示しない配管から貯水タンク７２３に供給する単位時間当たりの水の量を、貯水タンク７２３の図示しない小孔から排出される単位時間当たりの水の量よりも多くしている。したがって、貯水タンク７２３内の単位時間当たりに増加する水の量は、貯水タンク７２３に供給する単位時間当たりの水の量から、貯水タンク７２３の図示しない小孔から排出される単位時間当たりの水の量を除いた量になる。貯水タンク７２３に水の供給を続け、貯水タンク側回転モーメントが重り側回転モーメントを上回ると、引上機構７には支点部材７１を支点として反時計回りの回転モーメントが生じ、引上機構７は反時計回りに回転を開始する。この引上機構７の回転に伴いロッド部材３５とアーム部材３４が徐々に下がり、堰部材３１もヒンジ３２３を軸に反時計回りに回転して堰部材３１の上端部分３１ａも徐々に下がる。さらに貯水タンク７２３に水の供給を続けると、引上機構７はさらに反時計回りに回転する。一方、堰部材３１は、フロート３３とともに水中にもぐるに従いフロート３３によって堰部材３１に生じる浮力が徐々に大きくなる。やがてロッド部材３５の引当部３５３と引上アーム７３の挿通部７３２の上面が離れて、堰部材３１は、二点鎖線で示すように、フロート３３によって生じる浮力と堰止め機構３全体の重量とのバランスによって、堰部材３１の上端部分３１ａが水面Ｗから所定長もぐった流入許容位置に達する。なお、ロッド部材３５の引当部３５３と、引上アーム７３の挿通部７３２の上面が離れた状態では、貯水タンク側回転モーメントは、貯水タンク７２３、および天秤アーム７２１と引上アーム７３における支点部材７１よりも上流側の部分の重量によって生じる。また、堰部材３１の上端部分３１ａが水面Ｗからもぐった所定長は、例えば、３０ｍｍに設定されている。堰部材３１が流入許容位置に留まっている状態では、堰部材３１の上端部分３１ａを乗り越えたスカム混入水がトラフ５に流入し、このスカム混入水はトラフ５から図示しないスカムピットに流された後、ポンプによって汲み上げられ、スカムを取り除く所定の処理がなされる。 When water is started to be supplied to the water injection port 723a of the water storage tank 723 from a pipe (not shown), the amount of water in the water storage tank 723 increases, and the weight of the water storage tank 723 increases, so that the rotational moment on the water storage tank side also increases. The amount of water per unit time supplied to the water storage tank 723 from a pipe (not shown) is larger than the amount of water per unit time discharged from a small hole (not shown) of the water storage tank 723. Therefore, the amount of water that increases per unit time in the water storage tank 723 is the amount of water per unit time that is discharged from the small holes (not shown) of the water storage tank 723 from the amount of water that is supplied to the water storage tank 723 per unit time. It is the amount excluding the amount of. When water is continuously supplied to the water storage tank 723 and the rotation moment on the water storage tank side exceeds the rotation moment on the weight side, a counterclockwise rotation moment is generated in the pulling mechanism 7 with the fulcrum member 71 as a fulcrum, and the pulling mechanism 7 Start rotating counterclockwise. As the pulling mechanism 7 rotates, the rod member 35 and the arm member 34 gradually lower, the weir member 31 also rotates counterclockwise around the hinge 323, and the upper end portion 31a of the weir member 31 also gradually lowers. Further, when the water supply to the water storage tank 723 is continued, the pulling mechanism 7 further rotates counterclockwise. On the other hand, the weir member 31 gradually increases the buoyancy generated in the weir member 31 by the float 33 as it goes into the water together with the float 33. Eventually, the allocation portion 353 of the rod member 35 and the upper surface of the insertion portion 732 of the pulling arm 73 are separated from each other, and the weir member 31 has the buoyancy generated by the float 33 and the weight of the entire weir mechanism 3 as shown by the alternate long and short dash line. The balance of the above causes the upper end portion 31a of the weir member 31 to reach an inflow allowable position that has passed a predetermined length from the water surface W. When the allocation portion 353 of the rod member 35 and the upper surface of the insertion portion 732 of the pulling arm 73 are separated from each other, the rotational moment on the water storage tank side is the fulcrum member of the water storage tank 723 and the balance arm 721 and the pulling arm 73. It is caused by the weight of the portion upstream of 71. Further, the predetermined length of the upper end portion 31a of the weir member 31 passing from the water surface W is set to, for example, 30 mm. In the state where the weir member 31 remains in the allowable inflow position, the scum mixed water that has passed over the upper end portion 31a of the weir member 31 flows into the trough 5, and the scum mixed water is flowed from the trough 5 to a scum pit (not shown). , Pumped up and a predetermined process is performed to remove the scum.

さらに貯水タンク７２３への水の供給を続けると、引上機構７はさらに反時計回りに回転し、二点鎖線で示すように、引上アーム７３の基部７３１の上面がストッパ部材７４における上側ストッパ７４２の下端部７４２ａに当接し、引上機構７の反時計回りの回転は停止する。 Further, when the water supply to the water storage tank 723 is continued, the pulling mechanism 7 further rotates counterclockwise, and as shown by the alternate long and short dash line, the upper surface of the base 731 of the pulling arm 73 is the upper stopper in the stopper member 74. It comes into contact with the lower end portion 742a of the 742, and the counterclockwise rotation of the pulling mechanism 7 is stopped.

貯水タンク７２３への水の供給を停止し貯水タンク７２３の図示しない小孔からの水の排出だけが行われると、貯水タンク７２３内の水が減少して徐々に貯水タンク側回転モーメントも減少する。貯水タンク側回転モーメントより重り側回転モーメントの方が大きくなると、引上機構７は時計回りの回転を開始し、引上アーム７３の挿通部７３２の上面がロッド部材３５の引当部３５３に当接する。さらに貯水タンク７２３内の水の量が減少し、重り側回転モーメントが大きくなると、引上機構７は時計回りに回転し、ロッド部材３５とアーム部材３４とともに堰部材３１を引き上げる。なお、引上アーム７３の挿通部７３２の上面がロッド部材３５の引当部３５３に当接した後、引上機構７が時計回りに回転するときには、堰止め機構３全体の重量からフロート３３によって生じる浮力を除いた力が貯水タンク側回転モーメントに加わる。引上機構７は、引上アーム７３の基部７３１の下面がストッパ部材７４における下側ストッパ７４３の上端部７４３ａに当接するまで時計回りに回転する。これにより、堰部材３１はヒンジ３２３を軸に時計回りに回転し、堰部材３１の上端部分３１ａが水面Ｗよりも上に浮上して堰止め位置になり、トラフ５内へのスカム混入水の流入が阻止される。なお、この堰部材３１が、堰止め位置から流入許容位置へ移動し、再び堰止め位置に戻る一連の動作は、貯水タンク７２３に水を供給する図示しない配管の電磁弁を制御することで、例えば、１回５分程度、一日数回実施される。 When the supply of water to the water storage tank 723 is stopped and only water is discharged from a small hole (not shown) of the water storage tank 723, the water in the water storage tank 723 decreases and the rotational moment on the water storage tank side gradually decreases. .. When the rotation moment on the weight side becomes larger than the rotation moment on the water storage tank side, the pulling mechanism 7 starts rotating clockwise, and the upper surface of the insertion portion 732 of the pulling arm 73 comes into contact with the allocation portion 353 of the rod member 35. .. Further, when the amount of water in the water storage tank 723 decreases and the weight side rotation moment increases, the pulling mechanism 7 rotates clockwise and pulls up the weir member 31 together with the rod member 35 and the arm member 34. When the pulling mechanism 7 rotates clockwise after the upper surface of the insertion portion 732 of the pulling arm 73 comes into contact with the reserved portion 353 of the rod member 35, it is generated by the float 33 from the weight of the entire damming mechanism 3. The force excluding buoyancy is applied to the rotational moment on the water storage tank side. The pulling mechanism 7 rotates clockwise until the lower surface of the base portion 731 of the pulling arm 73 abuts on the upper end portion 743a of the lower stopper 743 of the stopper member 74. As a result, the weir member 31 rotates clockwise around the hinge 323, and the upper end portion 31a of the weir member 31 rises above the water surface W to be the weir stop position, and the scum mixed water into the trough 5 is formed. The inflow is blocked. The series of operations in which the weir member 31 moves from the weir position to the inflow allowable position and returns to the weir position again is performed by controlling the solenoid valve of the pipe (not shown) that supplies water to the water storage tank 723. For example, it is carried out several times a day for about 5 minutes each time.

次に、図４を用いて水位が異なる場合における堰部材の流入許容位置を説明する。図４は、図２に示すスカム除去装置の拡大断面図である。なお、図４では引上機構７を省略しているが、ロッド部材３５の引当部３５３と引上アーム７３の挿通部７３２の上面が離れて、堰部材３１が、自身に生じる浮力と堰止め機構３全体の自重とのバランスによって流入許容位置に留まっている状態を示している。図４では、平均的な水位である水面Ｗ１の場合の堰止め機構３を実線で示している。また、水面Ｗ１よりも水位が高くなった水面Ｗ２の場合には、堰部材３１、シール部材３２１の底面部分３２１ａ、ヒンジ３２３のみを一点鎖線で示している。さらに、水面Ｗ１よりも水位が低くなった水面Ｗ３の場合には、堰部材３１、シール部材３２１の底面部分３２１ａ、ヒンジ３２３のみを二点鎖線で示している。 Next, the allowable inflow position of the weir member when the water level is different will be described with reference to FIG. FIG. 4 is an enlarged cross-sectional view of the scum removing device shown in FIG. Although the pulling mechanism 7 is omitted in FIG. 4, the allocation portion 353 of the rod member 35 and the upper surface of the insertion portion 732 of the pulling arm 73 are separated from each other, and the weir member 31 has its own buoyancy and damming. It shows a state in which the mechanism 3 remains in the inflow allowable position due to the balance with the own weight of the entire mechanism 3. In FIG. 4, the weir mechanism 3 in the case of the water surface W1 which is the average water level is shown by a solid line. Further, in the case of the water surface W2 in which the water level is higher than the water surface W1, only the weir member 31, the bottom surface portion 321a of the seal member 321 and the hinge 323 are indicated by a alternate long and short dash line. Further, in the case of the water surface W3 whose water level is lower than that of the water surface W1, only the weir member 31, the bottom surface portion 321a of the seal member 321 and the hinge 323 are indicated by the alternate long and short dash line.

堰部材３１が流入許容位置の場合は、フロート３３によって堰部材３１に浮力が生じると同時に、堰部材３１に堰止め機構３全体の自重、本実施形態では主として、堰部材３１、側板３２２、アーム部材３４、およびロッド部材３５の重量がかかる。この堰部材３１に生じる浮力と堰止め機構３全体の自重とのバランスによって、堰部材３１は、その上端部分３１ａが水面Ｗ１から所定長Ｄ１もぐった流入許容位置に留まる。この所定長Ｄ１は、例えば３０ｍｍになるように、堰部材３１に生じる浮力と堰止め機構３全体の自重が調整される。 When the weir member 31 is in the inflow allowable position, the float 33 generates buoyancy in the weir member 31, and at the same time, the weir member 31 has its own weight of the entire weir mechanism 3, and in the present embodiment, the weir member 31, the side plate 322, and the arm are mainly used. The weight of the member 34 and the rod member 35 is applied. Due to the balance between the buoyancy generated in the weir member 31 and the weight of the entire weir mechanism 3, the upper end portion 31a of the weir member 31 stays at the inflow allowable position where the water surface W1 passes through the predetermined length D1. The buoyancy generated in the weir member 31 and the own weight of the entire weir mechanism 3 are adjusted so that the predetermined length D1 is, for example, 30 mm.

また、沈殿池９の水位が上昇して水面Ｗ２となった場合は、堰部材３１は、ヒンジ３２３を軸に時計回りに回転して、その上端部分３１ａが水面Ｗ２から所定長Ｄ２もぐった流入許容位置に留まる。さらに、沈殿池９の水位が下がって水面Ｗ３となった場合は、堰部材３１は、ヒンジ３２３を軸に反時計回りに回転して、その上端部分３１ａが水面Ｗ３から所定長Ｄ３もぐった流入許容位置に留まる。 Further, when the water level of the settling basin 9 rises to the water surface W2, the weir member 31 rotates clockwise around the hinge 323, and the upper end portion 31a thereof flows in from the water surface W2 through the predetermined length D2. Stay in the acceptable position. Further, when the water level of the settling basin 9 drops to the water surface W3, the weir member 31 rotates counterclockwise around the hinge 323, and the upper end portion 31a thereof flows in from the water surface W3 through the predetermined length D3. Stay in the acceptable position.

水位がＷ１〜Ｗ３のように変動しても、堰部材３１自身に生じる浮力と堰止め機構３全体の自重とのバランスによって所定長Ｄ１〜Ｄ３は同一になる。すなわち、流入許容位置は、堰部材３１の上端部分３１ａが水面Ｗから所定長Ｄ１〜Ｄ３もぐった位置に相当する。したがって、水位が変動してもトラフ５に流入するスカム混入水の量を一定にすることができる。さらに、堰部材３１は、自身に生じる浮力と堰止め機構３全体の自重とのバランスによって流入許容位置に留まることができるため、流入許容位置に留まらせるための複雑な機構等が不要になり、堰部材３１の流入許容位置のばらつきも生じ難い。 Even if the water level fluctuates as in W1 to W3, the predetermined lengths D1 to D3 become the same due to the balance between the buoyancy generated in the weir member 31 itself and the own weight of the entire weir mechanism 3. That is, the allowable inflow position corresponds to the position where the upper end portion 31a of the weir member 31 passes through the predetermined lengths D1 to D3 from the water surface W. Therefore, even if the water level fluctuates, the amount of scum mixed water flowing into the trough 5 can be kept constant. Further, since the weir member 31 can stay at the inflow allowable position by the balance between the buoyancy generated by itself and the own weight of the entire weir mechanism 3, a complicated mechanism or the like for keeping the weir member at the inflow allowable position becomes unnecessary. Variations in the allowable inflow position of the weir member 31 are unlikely to occur.

また、フロート３３を、浮力の異なる他のフロートに取り替えて堰部材３１に生じる浮力を調整することで、所定長Ｄ１〜Ｄ３の距離を変えてトラフ５へ流入するスカム混入水の量を調整することができる。さらに、ロッド部材３５や堰部材３１に重りを取り付けたり、ロッド部材３５やアーム部材３４等を重量の異なる他のロッド部材やアーム部材等に取り替えたりすることで、堰止め機構３全体の自重を変えて、所定長Ｄ１〜Ｄ３の深さを調整することもできる。 Further, by replacing the float 33 with another float having a different buoyancy and adjusting the buoyancy generated in the weir member 31, the amount of scum mixed water flowing into the trough 5 is adjusted by changing the distance of the predetermined lengths D1 to D3. be able to. Further, by attaching a weight to the rod member 35 or the weir member 31 or replacing the rod member 35 or the arm member 34 with another rod member or arm member having a different weight, the weight of the entire weir mechanism 3 can be reduced. It is also possible to change the depth of the predetermined lengths D1 to D3.

図５を用いて、堰部材３１が堰止め位置から流入許容位置へ移動を開始しない場合について説明する。 A case where the weir member 31 does not start moving from the weir stop position to the inflow allowable position will be described with reference to FIG.

図５は、図２に示すスカム除去装置の堰部材が、堰止め位置に留まっている状態を示す図である。上述したように、引上アーム７３が反時計回りの回転を開始すると、通常、堰部材３１は、自身に生じる浮力と堰止め機構３全体の自重とのバランスが均衡する流入許容位置へ移動を開始する。しかしながら、沈殿池９の水面Ｗに厚いスカムが浮いていたりすると、このスカムが邪魔をして、引上アーム７３が反時計回りの回転を開始しても、堰止め機構３全体が動かず、堰部材３１が堰止め位置に留まってしまう場合がある。堰止め機構３全体が移動せず堰部材３１が堰止め位置に留まっていると、反時計回りに回転する引上アーム７３の挿通部７３２における下面の一部が押受部３５４の一部に当接する。貯水タンク７２３内の水の量がさらに増えて貯水タンク側回転モーメントが大きくなると、図５の矢印で示すように、引上アーム７３の挿通部７３２が押受部３５４を下方に押す。これにより、堰部材３１を流入許容位置へ移動しやすくすることができる。 FIG. 5 is a diagram showing a state in which the weir member of the scum removing device shown in FIG. 2 remains at the weir stop position. As described above, when the pulling arm 73 starts to rotate counterclockwise, the weir member 31 normally moves to an inflow allowable position where the balance between the buoyancy generated by itself and the own weight of the entire weir mechanism 3 is balanced. Start. However, if a thick scum floats on the water surface W of the settling basin 9, even if this scum interferes and the pulling arm 73 starts to rotate counterclockwise, the entire weir mechanism 3 does not move. The weir member 31 may stay at the weir stop position. When the entire weir mechanism 3 does not move and the weir member 31 stays at the weir position, a part of the lower surface of the insertion portion 732 of the pulling arm 73 that rotates counterclockwise becomes a part of the pressing portion 354. Abut. When the amount of water in the water storage tank 723 is further increased and the rotational moment on the water storage tank side is increased, the insertion portion 732 of the pulling arm 73 pushes the pressing portion 354 downward as shown by the arrow in FIG. As a result, the weir member 31 can be easily moved to the inflow allowable position.

以上説明したように、本実施形態のスカム除去装置１によれば、水位が変動しても流入許容位置における水面から堰部材３１の上端部分３１ａまでの距離が一定になり、トラフ５に流入するスカム混入水の量を一定にすることができる。また、貯水タンク側回転モーメントよりも重り側回転モーメントが大きくなると堰部材３１を引き上げる構成とすることで、堰部材３１の引き上げにアクチュエータなどの新たな動力源を必要としない（いわゆる無動力）ため、エネルギー消費を抑えることができる。 As described above, according to the scum removing device 1 of the present embodiment, even if the water level fluctuates, the distance from the water surface at the inflow allowable position to the upper end portion 31a of the weir member 31 becomes constant and flows into the trough 5. The amount of scum mixed water can be kept constant. Further, since the weir member 31 is pulled up when the weight side rotational moment becomes larger than the water storage tank side rotational moment, a new power source such as an actuator is not required to pull up the weir member 31 (so-called no power). , Energy consumption can be suppressed.

本発明は上述の実施形態に限られることなく特許請求の範囲に記載した範囲で種々の変形を行うことが出来る。たとえば、本実施形態では、側板３２２に取り付けたフロート３３によって堰部材３１に浮力を付与しているが、このフロート３３を、堰部材３１に直接取り付ける構成としてもよい。また、堰部材３１を浮力が生じる材料で構成してフロート３３を省略することもできる。なお、堰部材３１を浮力が生じる材料で構成した場合には、堰部材３１に生じる浮力は、堰部材３１自身の浮力になる。また、本実施形態では、支点部材７１の下流側に重りを設け、支点部材７１の上流側に重量変化部材としての貯水タンク７２３を設ける構成としたが、この構成を逆にして、支点部材７１の下流側に貯水タンク等の重量変化部材を設け、支点部材７１の上流側に重りを設けてもよい。 The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, in the present embodiment, the weir member 31 is given buoyancy by the float 33 attached to the side plate 322, but the float 33 may be directly attached to the weir member 31. Further, the weir member 31 may be made of a material that generates buoyancy, and the float 33 may be omitted. When the weir member 31 is made of a material that generates buoyancy, the buoyancy generated in the weir member 31 becomes the buoyancy of the weir member 31 itself. Further, in the present embodiment, a weight is provided on the downstream side of the fulcrum member 71, and a water storage tank 723 as a weight changing member is provided on the upstream side of the fulcrum member 71. However, this configuration is reversed and the fulcrum member 71 is provided. A weight changing member such as a water storage tank may be provided on the downstream side of the fulcrum member 71, and a weight may be provided on the upstream side of the fulcrum member 71.

これまでに説明したスカム除去装置は、沈殿池の水面に浮かぶスカムが混入したスカム混入水が流入するトラフ、
前記トラフに流入しようとするスカム混入水を上端部分が前記水面よりも上になる所定の堰止め位置で堰止め該トラフにスカム混入水が流入することを阻止する堰部材を有する堰止め機構、および
前記堰部材を、前記上端部分が前記水面から所定長もぐった流入許容位置から前記堰止め位置まで、前記堰止め機構に当接することで引き上げる引上手段を備え、
前記堰部材は、前記引上手段によって前記堰止め位置まで引き上げられた後、自身に生じる浮力と前記堰止め機構全体の自重とのバランスによって該流入許容位置に復帰しようとするものであり、該堰止め機構が該引上手段と離れた状態で該バランスによって該流入許容位置に留まることが可能なものであり、
前記引上手段は、前記堰部材が前記堰止め位置にある堰止め状態から、該堰部材が前記流入許容位置にある流入許容状態を経て前記堰止め状態に再び戻るまでの間、前記堰止め状態で前記堰止め機構に当接する部分が、前記水面よりも上に位置するものであり、
前記堰止め機構は、前記堰止め状態から、前記流入許容状態を経て前記堰止め状態に再び戻るまでの間、前記堰止め状態で前記引上手段が当接する部分が、前記水面よりも上に位置するものであることを特徴とする。 The scum removal device described so far is a trough in which scum mixed water containing scum floating on the water surface of the settling basin flows in.
A weir mechanism having a weir member that blocks the scum mixed water that is about to flow into the trough at a predetermined weiring position where the upper end portion is above the water surface and prevents the scum mixed water from flowing into the trough. The weir member is provided with a pulling means for pulling up the weir member from an inflow allowable position where the upper end portion has passed a predetermined length from the water surface to the weiring position by contacting the weiring mechanism.
The weir member is pulled up to the damming position by the pulling means, and then tries to return to the inflow allowable position by the balance between the buoyancy generated by itself and the own weight of the entire weiring mechanism. The weir mechanism can stay at the inflow allowable position by the balance in a state separated from the pulling means.
The pulling means is the damming means from the damming state in which the weir member is in the damming position to the time when the weir member returns to the damming state through the inflow permissible state in the inflow permissible position. The portion that comes into contact with the weir mechanism in this state is located above the water surface.
In the weir mechanism, the portion of the weir that the pulling means comes into contact with the weir is above the water surface during the period from the weir state to the return to the weir state through the inflow allowable state. It is characterized by being located.

上記スカム除去装置によれば、堰部材は、引上手段によって堰止め位置まで引き上げられた後、自身に生じる浮力と堰止め機構全体の自重とのバランスによって流入許容位置に復帰しようとするものであり、堰止め機構が引上手段と離れた状態で該バランスによって該流入許容位置に留まることが可能なため、水位が変動しても流入許容位置における水面から堰部材の上端部分までの距離が一定になり、トラフに流入するスカム混入水の量を一定にすることができる。また、堰部材を流入許容位置に留めるために複雑な機構等が不要になり、動作精度の影響による堰部材の流入許容位置のばらつきも生じ難い。 According to the scum removing device, the weir member is pulled up to the damming position by the pulling means, and then tries to return to the inflow allowable position by the balance between the buoyancy generated by itself and the own weight of the entire weir mechanism. Since the weiring mechanism can stay at the inflow allowable position by the balance in a state of being separated from the pulling means, the distance from the water surface at the inflow allowable position to the upper end portion of the weir member is long even if the water level fluctuates. It becomes constant, and the amount of scum mixed water flowing into the trough can be made constant. Further, a complicated mechanism or the like is not required to keep the weir member in the inflow allowable position, and the inflow allowable position of the weir member is unlikely to vary due to the influence of the operation accuracy.

ここにいう自身に生じる浮力とは、堰部材自身の浮力であってもよいし、堰部材に浮力を与える浮力付与部材によって発生した浮力であってもよい。 The buoyancy generated by itself here may be the buoyancy of the weir member itself or the buoyancy generated by the buoyancy imparting member that gives the weir member buoyancy.

上記スカム除去装置において、前記引上手段は、支点と重りを有し、
前記堰部材は、前記支点を基準にして前記重りとは反対側に配置されたものであり、
前記反対側には重量が変化する重量変化部材を備え、
前記引上手段は、前記重量変化部材側の回転モーメントよりも前記重り側の回転モーメントが大きくなると前記堰部材を引き上げるものであることが好ましい。 In the scum removing device, the pulling means has a fulcrum and a weight.
The weir member is arranged on the side opposite to the weight with respect to the fulcrum.
A weight changing member that changes the weight is provided on the opposite side.
It is preferable that the pulling means pulls up the weir member when the rotational moment on the weight side becomes larger than the rotational moment on the weight changing member side.

重量変化部材側の回転モーメントよりも重り側の回転モーメントが大きくなると堰部材を引き上げる構成とすることで、堰部材の引き上げに電動の部材が不要になり、エネルギー消費を抑えることができる。また、専用の電気設備等も不要になる。 When the rotational moment on the weight side becomes larger than the rotational moment on the weight changing member side, the weir member is pulled up, so that an electric member is not required to pull up the weir member, and energy consumption can be suppressed. In addition, dedicated electrical equipment is not required.

また、上記スカム除去装置において、前記堰部材は、前記重り側の回転モーメントよりも前記重量変化部材側の回転モーメントが大きくなると、前記流入許容位置へ向けて復帰を開始することが可能なものであって、
前記堰止め機構は、前記堰部材が前記堰止め位置に留まっていると、前記流入許容位置側へ向けて前記重量変化部材側の回転モーメントによって前記引上手段が当接し前記流入許容位置側へ向けて押される押受部を有するものであってもよい。 Further, in the scum removing device, when the rotational moment on the weight changing member side becomes larger than the rotational moment on the weight side, the weir member can start returning to the inflow allowable position. There,
In the weir mechanism, when the weir member stays at the weir position, the pulling means abuts toward the inflow allowable position side due to the rotational moment on the weight changing member side, and the weir means moves toward the inflow allowable position side. It may have a pressing portion that is pushed toward it.

例えば、水面に浮遊するスカム等が邪魔して堰部材が流入許容位置へ向けて復帰を開始しない場合でも、押受部が重量変化部材側の回転モーメントによって押されることで、堰部材が流入許容位置へ移動しやすくなる。 For example, even if the weir member does not start returning toward the inflow allowable position due to a scum or the like floating on the water surface, the weir member is allowed to flow in by being pushed by the rotational moment on the weight changing member side. It becomes easier to move to the position.

さらに、上記スカム除去装置において、前記堰止め機構は、前記堰部材に生じる浮力およびこの堰止め機構全体の自重の少なくとも一方を調整可能なものであってもよい。 Further, in the scum removing device, the weir mechanism may be capable of adjusting at least one of the buoyancy generated in the weir member and the own weight of the entire weir mechanism.

堰部材に生じる浮力や堰止め機構全体の自重を調整することで、堰部材の流入許容位置を変えてトラフへ流入するスカム混入水の量を調整することができる。 By adjusting the buoyancy generated in the weir member and the weight of the entire weiring mechanism, the allowable inflow position of the weir member can be changed to adjust the amount of scum mixed water flowing into the trough.

以下、これまで説明したことを含めて付記する。 The following will be added, including what has been explained so far.

（付記１）他のスカム除去装置は、沈殿池の水面に浮かぶスカムが混入したスカム混入水が流入するトラフ、
前記トラフに流入しようとするスカム混入水を上端部分が前記水面よりも上になる堰止め位置で堰止め該トラフにスカム混入水が流入することを阻止する堰部材を有する堰止め機構、
前記堰部材に浮力を付与する浮力付与部材、および
前記堰部材を、前記上端部分が前記水面から所定長もぐった流入許容位置から前記堰止め位置まで引き上げる引上手段を備え、
前記堰部材は、前記流入許容位置がホームポジションであり、該流入許容位置では前記浮力付与部材による浮力と前記堰止め機構全体の自重とのバランスによって該流入許容位置に留まることが可能なものであることを特徴とする。 (Appendix 1) Another scum removing device is a trough in which scum mixed water containing scum floating on the water surface of the settling basin flows in.
A weir mechanism having a weir member that blocks the scum mixed water that is about to flow into the trough at a weir position where the upper end portion is above the water surface and prevents the scum mixed water from flowing into the trough.
A buoyancy imparting member that imparts buoyancy to the weir member, and a pulling means for pulling the weir member from an inflow allowable position where the upper end portion has passed a predetermined length from the water surface to the damming position are provided.
The weir member has a home position at the allowable inflow position, and can stay at the allowable inflow position at the allowable inflow position by balancing the buoyancy of the buoyancy imparting member and the own weight of the entire weir blocking mechanism. It is characterized by being.

（付記２）付記１のスカム除去装置において、前記浮力付与部材が、水中にもぐっている部分と水面より上に出ている部分とを有するものであってもよい。 (Appendix 2) In the scum removing device of Appendix 1, the buoyancy imparting member may have a portion that is submerged in water and a portion that is above the water surface.

（付記３）付記１又は付記２記載のスカム除去装置において、前記浮力付与部材が、発泡スチロールで構成されたものであってもよい。 (Appendix 3) In the scum removing device according to Appendix 1 or Appendix 2, the buoyancy imparting member may be made of Styrofoam.

（付記４）
他のスカム除去装置は、沈殿池の水面に浮かぶスカムが混入したスカム混入水が流入するトラフ、
前記トラフに流入しようとするスカム混入水を上端部分が前記水面よりも上になる堰止め位置で堰止め該トラフにスカム混入水が流入することを阻止する堰部材を有する堰止め機構、
前記堰部材に浮力を付与する浮力付与部材、および
前記堰部材を、前記上端部分が前記水面から所定長もぐった流入許容位置から前記堰止め位置まで引き上げる引上手段を備え、
前記堰部材は、前記流入許容位置がホームポジションであり、該流入許容位置では前記浮力付与部材による浮力と前記堰止め機構全体の自重とのバランスによって該流入許容位置に留まることが可能なものであり、
前記堰止め機構が、前記堰部材が前記堰止め位置に留まっていると、前記引上手段が当接し前記流入許容位置側へ向けて押される押受部を有するものであることを特徴とする。 (Appendix 4)
Other scum removal devices are troughs in which scum mixed water floating on the water surface of the sedimentation basin flows in.
A weir mechanism having a weir member that blocks the scum mixed water that is about to flow into the trough at a weir position where the upper end portion is above the water surface and prevents the scum mixed water from flowing into the trough.
A buoyancy imparting member that imparts buoyancy to the weir member, and a pulling means for pulling the weir member from an inflow allowable position where the upper end portion has passed a predetermined length from the water surface to the damming position are provided.
The weir member has a home position at the allowable inflow position, and can stay at the allowable inflow position at the allowable inflow position by balancing the buoyancy of the buoyancy imparting member and the own weight of the entire weir blocking mechanism. Yes,
The weir mechanism is characterized by having a pressing portion that, when the weir member stays at the weir position, the pulling means abuts and is pushed toward the inflow allowable position side. ..

（付記５）
付記４に記載のスカム除去装置において、前記浮力付与部材が、水中にもぐっている部分と水面より上に出ている部分とを有するものであってもよい。 (Appendix 5)
In the scum removing device according to Appendix 4, the buoyancy imparting member may have a portion that is submerged in water and a portion that is above the water surface.

（付記６）
また、付記４または付記５に記載のスカム除去装置において、前記浮力付与部材が、発泡スチロールで構成されたものであってもよい。 (Appendix 6)
Further, in the scum removing device according to Appendix 4 or Appendix 5, the buoyancy imparting member may be made of Styrofoam.

（付記７）
さらに、付記４乃至６に記載のスカム除去装置において、前記浮力付与部材による浮力を調整可能であってもよい。 (Appendix 7)
Further, in the scum removing device described in Appendix 4 to 6, the buoyancy by the buoyancy imparting member may be adjustable.

（付記８）
また、別のスカム除去装置は、沈殿池の水面に浮かぶスカムが混入したスカム混入水が流入するトラフ、
前記トラフに流入しようとするスカム混入水を上端部分が前記水面よりも上になる堰止め位置で堰止め該トラフにスカム混入水が流入することを阻止する堰部材を有する堰止め機構、
前記堰部材に浮力を付与する浮力付与部材、および
前記堰部材を、前記上端部分が前記水面から所定長もぐった流入許容位置から前記堰止め位置まで引き上げる引上手段を備え、
前記堰部材は、前記流入許容位置がホームポジションであり、該流入許容位置では前記堰止め機構が前記引上手段と離れた状態で前記浮力付与部材による浮力と該堰止め機構全体の自重とのバランスによって該流入許容位置に留まることが可能なものであり、
前記堰止め機構が、前記堰部材が前記堰止め位置に留まっていると、前記引上手段が当接し前記流入許容位置側へ向けて押される押受部を有するものであることを特徴とする。 (Appendix 8)
Another scum removal device is a trough in which scum mixed water with scum floating on the water surface of the settling basin flows in.
A weir mechanism having a weir member that blocks the scum mixed water that is about to flow into the trough at a weir position where the upper end portion is above the water surface and prevents the scum mixed water from flowing into the trough.
A buoyancy imparting member that imparts buoyancy to the weir member, and a pulling means for pulling the weir member from an inflow allowable position where the upper end portion has passed a predetermined length from the water surface to the damming position are provided.
In the weir member, the inflow allowable position is the home position, and at the inflow allowable position, the buoyancy by the buoyancy imparting member and the own weight of the entire weir mechanism are combined with the weir mechanism in a state of being separated from the pulling means. It is possible to stay in the inflow allowable position by the balance,
The weir mechanism is characterized by having a pressing portion that, when the weir member stays at the weir position, the pulling means abuts and is pushed toward the inflow allowable position side. ..

（付記９）
また、別のスカム除去装置は、沈殿池の水面に浮かぶスカムが混入し
たスカム混入水が流入するトラフ、
前記トラフに流入しようとするスカム混入水を上端部分が前記水面よりも上になる堰止め位置で堰止め該トラフにスカム混入水が流入することを阻止する堰部材を有する堰止め機構、
前記堰部材に浮力を付与する浮力付与部材、および
前記堰止め機構に設けられた引当部に当接することで、前記堰部材を、前記上端部分が前記水面から所定長もぐった流入許容位置から前記堰止め位置まで引き上げる引上手段を備え、
前記堰部材は、前記流入許容位置がホームポジションであり、該流入許容位置では前記引当部が前記引上手段と離れた状態で前記浮力付与部材による浮力と該堰止め機構全体の自重とのバランスによって該流入許容位置に留まることが可能なものであり、
前記堰止め機構が、前記引上手段による引き上げが解除された後に、前記堰部材が前記流入許容位置に復帰せずに前記堰止め位置に留まっていると、該引上手段が当接し該流入許容位置側へ向けて押される押受部を有するものであることを特徴とする。 (Appendix 9)
Another scum removal device is a trough in which scum mixed water with scum floating on the water surface of the settling basin flows in.
A weir mechanism having a weir member that blocks the scum mixed water that is about to flow into the trough at a weir position where the upper end portion is above the water surface and prevents the scum mixed water from flowing into the trough.
By abutting against the buoyancy-imparting member that imparts buoyancy to the weir member and the allocation portion provided in the weir-stopping mechanism, the weir member is pushed from the inflow allowable position where the upper end portion has passed a predetermined length from the water surface. Equipped with a pulling means to pull up to the weir position,
In the weir member, the inflow allowable position is the home position, and at the inflow allowable position, the balance between the buoyancy of the buoyancy imparting member and the own weight of the entire weir mechanism while the reserve portion is separated from the pulling means. It is possible to stay in the inflow allowable position by
When the weir member stays at the damming position without returning to the inflow allowable position after the pulling by the pulling means is released, the weir means comes into contact with the weir and the inflow. It is characterized by having a pressing portion that is pushed toward the allowable position side.

１スカム除去装置
３堰止め機構
３１堰部材
３３フロート
３５４押受部
５トラフ
７引上機構（引上手段）
７１支点部材（支点）
７２２重り
７２３貯水タンク（重量変化部材）
９沈殿池 1 Scum removal device 3 Weir stop mechanism 31 Weir member 33 Float 354 Pushing part 5 Trough 7 Pulling mechanism (pulling means)
71 fulcrum member (fulcrum)
722 Weight 723 Water storage tank (weight change member)
9 Settling basin

Claims

Trough in which scum mixed water with scum mixed floating on the water surface of the settling basin flows in
A weir mechanism having a weir member that blocks the scum mixed water that is about to flow into the trough at a weir position where the upper end portion is above the water surface and prevents the scum mixed water from flowing into the trough.
A buoyancy-imparting member that imparts buoyancy to the weir member, and
The weir member is provided with a pulling means for pulling up the weir member from an inflow allowable position where the upper end portion has passed a predetermined length from the water surface to the damming position by contacting with an allocation portion provided in the weiring mechanism .
The dam member, the at inflow allowable position in response to a change in position of the water surface by a balance between the provision unit said pulling means and away own weight of the total buoyancy blocking mechanism according to the buoyancy imparting member at state while by rotating those which can remain in the inflow permitting position state, and are it is long time in the dam position than being received allowable position,
A scum removing device, characterized in that the allocation portion is maintained in a state separated from the pulling means while the weir member remains at the inflow allowable position even if the height position of the water surface changes .

The scum removing device according to claim 1 , wherein the buoyancy applying member can be replaced separately from the weir member .

The scum removing device according to claim 1 or 2, wherein the weir member rotates in a direction of contacting and separating from the trough .

Claims 1 to 3, wherein the weir member changes from the inflow allowable position to the damming position and also changes from the damming position to the inflow allowable position by rotating . The scum removing device according to any one of the above.