JP5248140B2 - Mixing paint supply device - Google Patents

Mixing paint supply device Download PDF

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JP5248140B2
JP5248140B2 JP2008045514A JP2008045514A JP5248140B2 JP 5248140 B2 JP5248140 B2 JP 5248140B2 JP 2008045514 A JP2008045514 A JP 2008045514A JP 2008045514 A JP2008045514 A JP 2008045514A JP 5248140 B2 JP5248140 B2 JP 5248140B2
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supply path
main agent
curing agent
agent
path
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JP2009202070A (en
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信之 林
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Asahi Sunac Corp
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Asahi Sunac Corp
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Description

本発明は、混合塗料の供給装置に関するものである。   The present invention relates to a mixed paint supply apparatus.

特許文献１には、主剤と硬化剤とを混合して得られる塗料を供給する装置が開示されている。この装置は、主剤供給路と硬化剤供給路を共用供給路の上流端に接続するとともに、共用供給路の下流端にスタティックミキサを接続した構造になり、共用供給路に主剤と硬化剤とが交互に投入されるようになっている。交互投入された主剤硬化剤は、共用供給路を通過する過程で共用供給路の内壁に近い領域と内壁から遠い領域との間における流速の相違によりブロック状から層膜状に変化し、その後、スタティックミキサを通過する過程で撹拌されて混合され、塗料となる。
特開２００７−１４４２８６公報 Patent Document 1 discloses an apparatus for supplying a paint obtained by mixing a main agent and a curing agent. This apparatus has a structure in which a main agent supply path and a curing agent supply path are connected to the upstream end of the common supply path, and a static mixer is connected to the downstream end of the common supply path, and the main agent and the curing agent are connected to the common supply path. It is designed to be inserted alternately. The alternating main agent curing agent is changed from a block shape to a layer film shape due to a difference in flow rate between a region near the inner wall of the shared supply path and a region far from the inner wall in the process of passing through the shared supply path, In the process of passing through the static mixer, it is agitated and mixed to become a paint.
JP 2007-144286 A

共用供給路内の主剤と硬化剤は、十分に混合されていないので、比較的分離し易い。そのため、塗料の供給が中断されると、共用供給路内では、流れの止まった主剤と硬化剤がその比重の相違により上下に分離し、主剤の大きなブロックと硬化剤の大きなブロックとに二分されることが懸念される。
このようになると、塗料の供給が再開されたときに、スタティックミキサには主剤と硬化剤のうちいずれか一方の液剤だけが大量に流入し、その後、他方の液剤が大量に流入することになるため、スタティックミキサ内での撹拌が十分に進まず、スタティックミキサから吐出された塗料は、主剤の多い部分と硬化剤の多い部分とが偏在したものになってしまう。
本発明は上記のような事情に基づいて完成されたものであって、塗料の供給が中断された後においても、混合斑のない塗料を供給できるようにすることを目的とする。 Since the main agent and the curing agent in the common supply path are not sufficiently mixed, they are relatively easily separated. Therefore, when the supply of paint is interrupted, the main agent that has stopped flowing and the hardener are separated into upper and lower parts due to the difference in specific gravity in the common supply path, and are divided into a large block of the main agent and a large block of the hardener. There is a concern.
In this case, when the supply of the paint is resumed, only one of the main agent and the curing agent flows into the static mixer in a large amount, and then the other liquid agent flows in a large amount. Therefore, stirring in the static mixer does not proceed sufficiently, and the paint discharged from the static mixer is unevenly distributed in a portion with a large amount of the main agent and a portion with a large amount of the curing agent.
The present invention has been completed based on the above-described circumstances, and an object thereof is to be able to supply a paint having no mixed spots even after the supply of the paint is interrupted.

上記の目的を達成するための手段として、請求項１の発明は、主剤を圧送するための専用の主剤用供給路と、主剤とは比重が異なる硬化剤を圧送するための専用の硬化剤用供給路と、内径が全長に亘って一定であって、上流端に前記主剤用供給路の下流端と前記硬化剤用供給路の下流端とが接続された共用供給路と、前記共用供給路の下流端に接続されたスタティックミキサとを備え、前記共用供給路の上流端に交互投入された主剤と硬化剤が、その界面を先細りの筍状に変形させながら同心円状の多数層に積層するように前記共用供給路内で分配された後、前記スタティックミキサを通過する過程で混合されることによって混合塗料が得られ、その混合塗料を塗装ガンに供給するようになっている混合塗料の供給装置であって、前記共用供給路は、複数の低所流路と前記複数の低所流路よりも高い位置に配された複数の高所流路とが交互に並んだ形態となっていて、前記塗装ガンへの混合塗料の供給が中断されると、主剤と硬化剤のうち比重の大きい側の液剤が前記低所流路内に沈み、比重の小さい側の液剤が前記高所流路内で浮いた状態となるところに特徴を有する。 As means for achieving the above object, the invention of claim 1 is for a dedicated main agent supply path for pumping the main agent and a dedicated hardener for pumping a hardener having a specific gravity different from that of the main agent. A common supply path having a constant inner diameter over its entire length and having an upstream end connected to a downstream end of the main agent supply path and a downstream end of the curing agent supply path; and the common supply path A main mixer and a curing agent alternately supplied to the upstream end of the common supply path are laminated in a plurality of concentric layers while deforming the interface into a tapered bowl shape. after the distributed by the shared supply path to the to be mixed in the process of passing through the static mixer thus coating mix is obtained, of which mixing paint so as to supply the mixed paint to the spray gun A supply device, the shared service Road includes a plurality of low-income flow path and the plurality of low-income flow path a plurality of heights passage disposed at a position higher than is it the form alternating, coating mix to the spray gun When the supply of the liquid is interrupted, the liquid agent having a larger specific gravity of the main agent and the curing agent sinks in the low passage and the liquid agent having a lower specific gravity floats in the high passage. It has the characteristics.

請求項２の発明は、請求項１に記載のものにおいて、前記共用供給路が、コイル状流路を備えており、前記コイル状流路におけるコイル一巻き分の流路の容積が、主剤と硬化剤の１サイクルの投入量と同じ量に設定されているところに特徴を有する。 Invention of Claim 2 is the thing of Claim 1, The said common supply path is provided with the coil-shaped flow path, The volume of the flow path for one coil of turns in the said coil-shaped flow path is the main ingredient. It is characterized in that it is set to the same amount as that of one cycle of the curing agent .

＜請求項１の発明＞
混合塗料の供給が中断され、主剤と硬化剤が交互投入された共用供給路内において主剤と硬化剤の流動が停止すると、主剤と硬化剤がその比重の相違により上下に分離し、主剤と硬化剤のうち比重の大きい側の液剤が低所流路内に沈み、比重の小さい側の液剤が高所流路内に浮いた状態となる。ここで、低所流路と高所流路は、夫々、複数ずつ交互に配置された形態となっているので、共用供給路内においては、その上流端から下流端に亘って主剤と硬化剤とが交互に並んだ状態となる。したがって、混合塗料の供給が再開されたときには、大量の主剤だけ又は大量の硬化剤だけがスタティックミキサ内に流入する、という虞がなく、スタティックミキサ内における主剤と硬化剤の撹拌と混合が良好に行われる。 <Invention of Claim 1>
When the supply of the mixed paint is interrupted and the flow of the main agent and the curing agent stops in the common supply path in which the main agent and the curing agent are alternately charged, the main agent and the curing agent are separated from each other due to the difference in specific gravity, and the main agent and the curing agent are separated. The liquid agent on the side with a higher specific gravity of the agent sinks into the low channel and the liquid agent on the side with a lower specific gravity floats in the high channel. Here, since the low flow path and the high flow path are alternately arranged in plural, the main agent and the curing agent are formed from the upstream end to the downstream end in the common supply path. And are arranged alternately. Therefore, when the supply of the mixed paint is resumed, there is no risk that only a large amount of the main agent or only a large amount of the curing agent will flow into the static mixer, and the mixing and mixing of the main agent and the curing agent in the static mixer will be good. Done.

＜請求項２の発明＞
共用供給路がコイル状流路を備えているので、コイル状流路のコイル軸が水平又は水平に近い向きになっている限り、共用供給路がどのような姿勢に変動しても、複数の低所流路と複数の高所流路が交互に配置された形態が保たれる。 <Invention of Claim 2>
Since the shared supply path has a coiled flow path, as long as the coil axis of the coiled flow path is horizontal or nearly horizontal, no matter what posture the shared supply path fluctuates, The form where the low place flow path and the plurality of high place flow paths are alternately arranged is maintained.

＜実施形態１＞
以下、本発明を具体化した実施形態１を図１及び図２を参照して説明する。本実施形態の混合塗料の供給装置は、図１に示すように、主剤用供給路１０と硬化剤用供給路１１と共用供給路１２とスタティックミキサ１３とを備えて構成されており、共用供給路１２の上流端に交互投入された主剤と硬化剤が共用供給路１２とスタティックミキサ１３とを順に通過する過程で混合されることにより混合塗料（例えば、水性二液ウレタン塗料）が得られて、この混合塗料が塗装ガン１４に供給されるようになっている
主剤用供給路１０の上流端には、主剤を圧送するための周知構造の主剤用圧送装置１５が接続され、主剤用供給路１０の途中には流量計１６が設けられている。硬化剤用供給路１１の上流端には、硬化剤を圧送するための周知構造の硬化剤用圧送装置１７が接続され、硬化剤用供給路１１の途中には流量計１８が設けられている。 <Embodiment 1>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the mixed paint supply apparatus of the present embodiment is configured to include a main agent supply path 10, a curing agent supply path 11, a common supply path 12, and a static mixer 13. A mixed paint (for example, an aqueous two-component urethane paint) is obtained by mixing the main agent and the curing agent alternately supplied to the upstream end of the passage 12 in the course of passing through the common supply passage 12 and the static mixer 13 in order. The mixed paint is supplied to the coating gun 14. An upstream end of the main agent supply passage 10 is connected to a known main agent pumping device 15 for pumping the main agent, and the main agent supply passage. 10 is provided with a flow meter 16. A hardener pumping device 17 having a known structure for pumping the hardener is connected to the upstream end of the hardener supply passage 11, and a flow meter 18 is provided in the middle of the hardener supply passage 11. .

共用供給路１２の上流端には、合流器１９が接続されている。合流器１９は、主剤用流入口（図示せず）と硬化剤用流入口（図示せず）と流出口（図示せず）とを備えている。主剤用流入口には、主剤用供給路１０の下流端が接続されているとともに、主剤用供給路１０側への逆流を規制するための逆止弁２０が設けられている。硬化剤用流入口には、硬化剤用供給路１１の下流端が接続されているともに、硬化剤用供給路１１側への逆流を規制するための逆止弁２１が設けられている。流出口には共用供給路１２の上流端が接続されている。この合流器１９には、主剤用供給路１０と硬化剤用供給路１１を通して所定量の主剤と硬化剤が交互に投入され、投入された主剤と硬化剤が共用供給路１２内に送り込まれるようになっている。   A merger 19 is connected to the upstream end of the common supply path 12. The merger 19 includes a main agent inlet (not shown), a hardener inlet (not shown), and an outlet (not shown). A downstream end of the main agent supply path 10 is connected to the main agent inflow port, and a check valve 20 for restricting the back flow toward the main agent supply path 10 is provided. The hardener inlet is connected to the downstream end of the hardener supply path 11 and is provided with a check valve 21 for restricting the backflow toward the hardener supply path 11. The upstream end of the common supply path 12 is connected to the outlet. A predetermined amount of the main agent and the curing agent are alternately charged into the merger 19 through the main agent supply path 10 and the curing agent supply path 11 so that the charged main agent and the curing agent are fed into the common supply path 12. It has become.

共用供給路１２は、図２に示すように、内径が全長に亘って一定であって横断面形状が円形をなすパイプ２２からなる。パイプ２２は、例えば金属製等のように形状が容易に変化しない材料からなり、その両端部を除いた大部分の領域がコイル状に曲げ加工（即ち、円形に螺旋巻き）されることでコイル状流路２３を構成している。   As shown in FIG. 2, the common supply path 12 includes a pipe 22 having an inner diameter that is constant over the entire length and a circular cross-sectional shape. The pipe 22 is made of a material whose shape does not change easily, such as a metal, and the majority of the area excluding both ends thereof is bent into a coil shape (that is, spirally wound in a circular shape) to form a coil. The flow path 23 is comprised.

コイル状流路２３のコイル軸は直線状に保たれ、コイル状流路２３のコイル径は、コイル状流路２３の上流端から下流端に至るまで一定に保たれている。また、コイル状流路２３においては、コイル状流路２３を構成しているパイプ２２がコイル軸方向において互いに離間するように螺旋ピッチが設定されており、この螺旋ピッチは、コイル状流路２３の上流端から下流端に至るまで一定である。このコイル状流路２３におけるコイル一巻き分の流路の容積は、主剤と硬化剤の１サイクルの投入量（即ち、共用供給路１２に対する主剤の一回当たりの投入量と共用供給路１２に対する硬化剤の一回当たりの投入量とを併せた体積）と同じに設定されている。   The coil axis of the coiled channel 23 is kept linear, and the coil diameter of the coiled channel 23 is kept constant from the upstream end to the downstream end of the coiled channel 23. Further, in the coiled flow path 23, the helical pitch is set so that the pipes 22 constituting the coiled flow path 23 are separated from each other in the coil axis direction. It is constant from the upstream end to the downstream end. The volume of the coil for one turn of the coil-shaped flow path 23 is determined based on the input amount of the main agent and the curing agent in one cycle (that is, the input amount per main agent for the common supply path 12 and the common supply path 12). It is set to be the same as the volume combined with the input amount of the curing agent.

共用供給路１２を構成しているパイプ２２の直線状をなす短い両端部のうち一方の端部は、コイル状流路２３の上流端に対してコイル軸と略平行な流入路２４として接続された形態となっており、この流入路２４の上流端が合流器１９の流出口に接続されている。パイプ２２の他方の端部は、コイル状流路２３の下流端に対してコイル軸と略平行な流出路２５として接続された形態となっており、この流出路２５の下流端がスタティックミキサ１３の上流端に接続されている。   One end of the straight short ends of the pipe 22 constituting the common supply path 12 is connected to the upstream end of the coiled flow path 23 as an inflow path 24 substantially parallel to the coil axis. The upstream end of the inflow path 24 is connected to the outlet of the merger 19. The other end of the pipe 22 is connected to the downstream end of the coiled flow path 23 as an outflow path 25 substantially parallel to the coil axis, and the downstream end of the outflow path 25 is connected to the static mixer 13. It is connected to the upstream end.

かかる共用供給路１２は、そのコイル状流路２３のコイル軸を水平に向けた姿勢に保たれるように固定して設置されている。このようにコイル軸を水平に向けて設置された状態では、図２に示すように、コイル状流路２３の上流端とここに連なる流入路２４が最も高い位置に配置され、コイル状流路２３の下流端とここに連なる流出路２５が最も低い位置に配置されている。   The shared supply path 12 is fixedly installed so that the coil axis of the coiled flow path 23 is maintained in a horizontal orientation. In such a state where the coil axis is horizontally oriented, as shown in FIG. 2, the upstream end of the coiled flow path 23 and the inflow path 24 connected thereto are arranged at the highest position, and the coiled flow path The downstream end of 23 and the outflow path 25 connected to the downstream end are arranged at the lowest position.

また、コイル状流路２３は、コイル軸と平行な水平な仮想境界面Ｓを境としてそれよりも下方の円弧形をなす複数の低所流路２６と、仮想境界面よりも上方の円弧形をなす複数の高所流路２７とによって構成される。この複数の低所流路２６と複数の高所流路２７は、コイル軸の軸線方向において交互に並ぶように位置しており、１つの低所流路２６と１つの高所流路２７によってコイル一巻き分の流路が構成される。上述したようにコイル一巻き分の流路の容積は主剤と硬化剤の１サイクルの投入量と同じに設定されており、また、１つの低所流路２６の容積は１サイクルの主剤の投入量と同じであり、１つの高所流路２７の容積は硬化剤の１サイクルの投入量と同じである。   The coil-shaped flow path 23 includes a plurality of low flow paths 26 having a circular arc shape below a horizontal virtual boundary surface S parallel to the coil axis, and a circle above the virtual boundary surface. It is comprised by the several high place flow path 27 which makes an arc shape. The plurality of low passages 26 and the plurality of high passages 27 are positioned so as to be alternately arranged in the axial direction of the coil axis, and are constituted by one low passage 26 and one high passage 27. A flow path for one coil is formed. As described above, the volume of the flow path for one turn of the coil is set to be the same as the input amount of the main agent and the curing agent for one cycle, and the volume of one low passage 26 is the input of the main agent for one cycle. The volume of one high passage 27 is the same as the input amount of the curing agent in one cycle.

共用供給路１２の下流端にはスタティックミキサ１３の上流端が接続されている。スタティックミキサ１３は、円形断面の管状部材（図示せず）の内部に、板片を１８０°反転するように螺旋状に捻った形態であって捻れ方向が逆向きとなった２種類のエレメント（図示せず）を、流れ方向（スタティックミキサ１３の長さ方向）に沿って並べた周知構造のものであって、捻れ方向が逆向きとなるエレメントが交互に配置され、隣り合うエレメントの端縁同士が互いに直角の向きとなるように連なっている。そして、このスタティックミキサ１３の下流端には、塗料供給路２８の上流端が接続され、塗料供給路２８の下流端には塗装ガン１４が接続されている。   The upstream end of the static mixer 13 is connected to the downstream end of the common supply path 12. The static mixer 13 has two types of elements (twisted in a reverse direction) in a spirally twisted form so that a plate piece is inverted 180 ° inside a tubular member (not shown) having a circular cross section. (Not shown) having a known structure in which the elements are arranged along the flow direction (the length direction of the static mixer 13), the elements having opposite twist directions are alternately arranged, and the edges of adjacent elements They are connected so that they are oriented at right angles to each other. The downstream end of the static mixer 13 is connected to the upstream end of the paint supply path 28, and the paint gun 14 is connected to the downstream end of the paint supply path 28.

次に、本実施形態の作用を説明する。塗装ガン１４に混合塗料を供給する際には、主剤用供給路１０と硬化剤用供給路１１を通して主剤と硬化剤を所定量ずつ合流器１９（共用供給路１２の上流端）に交互に投入する。交互投入された主剤と硬化剤は、共用供給路１２の螺旋状の経路（コイル状流路２３）に沿って何度も上下に変位しながらスタティックミキサ１３に向かって流れていく。   Next, the operation of this embodiment will be described. When supplying mixed paint to the coating gun 14, a predetermined amount of the main agent and the curing agent are alternately fed into the junction 19 (upstream end of the common supply passage 12) through the main agent supply path 10 and the hardener supply path 11. To do. The alternately charged main agent and curing agent flow toward the static mixer 13 while being displaced up and down many times along the spiral path (coiled flow path 23) of the common supply path 12.

共用供給路１２内においては、共用供給路１２を構成するパイプ２２の内壁から遠ざかるほど流速が速くなることから、主剤と硬化剤の界面が次第に先細りのキャップ状（筍状）に変形し、スタティックミキサ１３に近づくのに伴って先細りの度合いが強くなる。したがって、共用供給路１２内をパイプ２２と直角に輪切り状にした仮想断面上において同心円状に交互に形成される主剤の層と硬化剤の層の積層数は、スタティックミキサ１３に近づくほど増えていく。そして、スタティックミキサ１３に接近するほど、共用供給路１２内の径方向における主剤と硬化剤の分配度が高まっていき、スタティックミキサ１３に流入する時点で主剤と硬化剤が十分に分配された状態となる。   In the common supply path 12, the flow rate increases as the distance from the inner wall of the pipe 22 constituting the common supply path 12 increases, so that the interface between the main agent and the curing agent gradually deforms into a tapered cap shape (saddle shape), and static As the mixer 13 is approached, the degree of taper increases. Therefore, the number of layers of the main agent layer and the curing agent layer alternately formed concentrically on the virtual cross section in which the inside of the common supply path 12 is cut at right angles to the pipe 22 increases as the static mixer 13 is approached. Go. Then, the closer to the static mixer 13, the higher the distribution ratio of the main agent and the curing agent in the radial direction in the common supply path 12, and the main agent and the curing agent are sufficiently distributed when flowing into the static mixer 13. It becomes.

上記のように多数層に積層するように十分に分配された状態でスタティックミキサ１３内に流入した主剤と硬化剤は、１つのエレメントを通過する過程で、半円形断面をなす２つの空間に分割されて螺旋状に捻られた後、次のエレメントに移行するときに位相が９０°ずれた２つの半円形断面の空間に分割され、その２つの半円形の空間内で逆向きに捻られる、という分割動作と捻れ動作を交互に繰り返しながら流れていく。このように、主剤と硬化剤は、細かく分散されつつ混合されることにより撹拌され、この細分化と混合は、スタティックミキサ１３の下流側へ移動するのに伴って進んでいくので、スタティックミキサ１３を通過した時点では、主剤と硬化剤の混合比率のばらつきが小さくなる。   As described above, the main agent and the curing agent that have flowed into the static mixer 13 in a sufficiently distributed state so as to be stacked in multiple layers are divided into two spaces having a semicircular cross section in the process of passing through one element. After being twisted in a spiral, it is divided into two semicircular cross-sectional spaces that are 90 ° out of phase when moving to the next element, and twisted in the opposite directions within the two semicircular spaces, It flows while repeating the splitting and twisting operations. As described above, the main agent and the curing agent are stirred while being finely dispersed, and the subdivision and mixing proceed as they move to the downstream side of the static mixer 13. When passing, the variation in the mixing ratio of the main agent and the curing agent becomes small.

スタティックミキサ１３を通過して撹拌された主剤と硬化剤の混合液は、スタティックミキサ１３から塗装ガン１４に至る塗料供給路２８内において、共用供給路１２内を流動する場合と同じく、塗料供給路２８の内壁からの離間寸法に起因する流速の違いにより、更に径方向に分配されていく。このように、共用供給路１２に所定量ずつ交互に投入された主剤と硬化剤は、共用供給路１２内を流れる間に受ける十分な分配作用と、スタティックミキサ１３内を通過する間に受ける十分な分散作用（撹拌作用）と、塗料供給路２８内を流れる間に受ける十分な分配作用とにより、塗装ガン１４に到達した時点で所定の比率に混合された良好な混合塗料となる。   The mixed liquid of the main agent and the curing agent that has been stirred through the static mixer 13 flows in the common supply path 12 in the paint supply path 28 from the static mixer 13 to the coating gun 14. 28 is further distributed in the radial direction due to the difference in flow velocity caused by the distance from the inner wall of 28. As described above, the main agent and the curing agent alternately charged into the common supply path 12 by a predetermined amount are sufficiently distributed during the flow through the common supply path 12 and sufficiently received during the passage through the static mixer 13. Due to a good dispersion action (stirring action) and a sufficient distribution action received while flowing in the paint supply path 28, a good mixed paint mixed at a predetermined ratio when reaching the paint gun 14 is obtained.

さて、塗装ガン１４に対する混合塗料の供給が中断されると、主剤と硬化剤が交互投入されている共用供給路１２においても、主剤と硬化剤の流動が停止する。すると、コイル状流路２３内においては、主剤と硬化剤がその比重の相違により上下に分離し、硬化剤よりも比重の大きい主剤が低所流路２６内に沈み、主剤よりも比重の小さい硬化剤が高所流路２７内に浮いた状態となる。   Now, when the supply of the mixed paint to the coating gun 14 is interrupted, the flow of the main agent and the curing agent also stops in the common supply path 12 where the main agent and the curing agent are alternately supplied. Then, in the coiled channel 23, the main agent and the curing agent are separated from each other due to the difference in specific gravity, and the main agent having a specific gravity larger than that of the curing agent sinks in the low-passage channel 26 and has a specific gravity smaller than that of the main agent. The curing agent is in a state of floating in the high place flow path 27.

ここで、低所流路２６と高所流路２７は、夫々、複数ずつ交互に配置された形態となっているので、コイル状流路２３内においては、その上流端から下流端に亘って主剤と硬化剤とが交互に並んだ状態となる。しかも、１つの低所流路２６の容積は、共用供給路１２に対する１回当たりの主剤の投入量と同じであり、１つの高所流路２７の容積は、共用供給路１２に対する１回当たりの硬化剤の投入量と同じである。したがって、コイル状流路２３内に滞留している主剤と硬化剤は、共用供給路１２に交互投入されるときの混合比と同じ割合で、コイル状流路２３の上流端から下流端に向かって交互に配置された状態となる。   Here, since the low channel 26 and the high channel 27 are alternately arranged, a plurality of the low channel 26 and the high channel 27 are arranged in the coiled channel 23 from the upstream end to the downstream end. The main agent and the curing agent are alternately arranged. In addition, the volume of one low channel 26 is the same as the amount of the main agent charged to the common supply channel 12 once, and the volume of one high channel 27 is one for the common supply channel 12. It is the same as the amount of the curing agent input. Therefore, the main agent and the curing agent staying in the coiled flow path 23 are directed from the upstream end to the downstream end of the coiled flow path 23 at the same ratio as the mixing ratio when alternately charged into the common supply path 12. Are alternately arranged.

この後、混合塗料の供給が再開されると、再開当初は、共用供給路１２（コイル状流路２３）の下流端端部に位置している主剤と硬化剤が、共用供給路１２への投入量と概ね同量ずつ交互にスタティックミキサ１３に流入する。その後、供給が進むのに伴い、分配が進んだ主剤と硬化剤がスタティックミキサ１３に流入するようになる。   Thereafter, when the supply of the mixed paint is resumed, at the beginning of the resumption, the main agent and the curing agent positioned at the downstream end of the common supply path 12 (coiled flow path 23) are supplied to the common supply path 12. It flows into the static mixer 13 alternately by approximately the same amount as the input amount. Thereafter, as the supply proceeds, the main agent and the curing agent that have been distributed flow into the static mixer 13.

以上、説明したように、本実施形態の共用供給路１２は、複数の低所流路２６と複数の高所流路２７とが交互に並んだ形態となっているので、混合塗料の供給が再開されたときには、大量の主剤だけがスタティックミキサ１３に流入したり、大量の硬化剤だけがスタティックミキサ１３に流入する、という事態が発生する虞はない。これにより、スタティックミキサ１３内における主剤と硬化剤の撹拌と混合が良好に行われ、塗料の供給が中断された後においても、混合斑のない混合塗料を塗装ガン１４に供給することができる。   As described above, the shared supply path 12 of the present embodiment has a configuration in which a plurality of low-level flow paths 26 and a plurality of high-level flow paths 27 are alternately arranged. When resuming, there is no possibility that only a large amount of the main agent flows into the static mixer 13 or only a large amount of the curing agent flows into the static mixer 13. As a result, the main agent and the curing agent in the static mixer 13 are well stirred and mixed, and even after the supply of the paint is interrupted, the mixed paint having no mixed spots can be supplied to the coating gun 14.

また、本実施形態では、共用供給路１２をコイル状としているので、共用供給路１２のコイル軸を水平又は水平に近い向きにしている限り、共用供給路１２をどのような姿勢に変動させて設置した場合でも、複数の低所流路２６と複数の高所流路２７が交互に配置された形態を保つことができるようになっている。   In the present embodiment, since the shared supply path 12 is coiled, as long as the coil axis of the shared supply path 12 is horizontal or nearly horizontal, the shared supply path 12 can be changed to any posture. Even in the case of being installed, it is possible to maintain a form in which a plurality of low passages 26 and a plurality of high passages 27 are alternately arranged.

＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施態様も本発明の技術的範囲に含まれる。
（１）上記実施形態では共用供給路内におけるコイル一巻き分の流路の容積を、主剤と硬化剤の１サイクルの投入量（一回の主剤の投入量と一回の硬化剤の投入量とを併せた体積）と同じとしたが、本発明によれば、コイル一巻き分の流路の容積は、主剤と硬化剤の１サイクルの投入量より多くてもよい。
（２）共用供給路内におけるコイル一巻き分の流路の容積は、主剤と硬化剤の１サイクルの投入量より少なくてもよい。この場合、コイル一巻き分の流路の容積は、主剤の一回の投入量より多い量であっても少ない量であってもよく、また、硬化剤の一回の投入量より多い量であっても少ない量であってもよい。
（３）上記実施形態では共用供給路をコイル軸の軸線方向において伸縮不能に固定された形態としたが、共用供給路は、コイル軸の軸線方向に弾性的に伸縮可能であってもよい。
（４）上記実施形態では共用供給路をコイル軸の軸線を湾曲させるような弾性変形を生じない形態としたが、共用供給路は、コイル軸の軸線を湾曲させるような形態で弾性変形し得るものであってもよい。
（５）上記実施形態では共用供給路がそのコイル軸の軸線を水平に保つように固定されていたが、共用供給路は、コイル軸を水平に対して斜めをなす形態で固定されていてもよく、また、コイル軸が水平に対して斜めをなすように姿勢を傾けうる形態であってもよい。
（６）上記実施形態では共用供給路はそのコイル軸が直線状をなす形状であったが、共用供給路は、そのコイル軸が湾曲させた形状であってもよい。
（７）上記実施形態では共用供給路の上流端から下流端に至るまでコイル径が一定であったが、コイル径がコイル軸の軸線方向において変化する形態であってもよい。具体的には、コイル径が上流端から下流端に向かって次第に小さくなる形態、コイル径が上流端から下流端に向かって次第に大きくなる形態と、コイル径が上流端部と下流端で大きい形態、コイル径が上流端と下流端で小さい形態、上流端から下流端に亘ってコイル径の大きい部分と小さい部分が交互に連続する形態等が可能である。
（８）上記実施形態では共用供給路の螺旋ピッチが上流端から下流端に至るまで一定であったが、共用供給路の螺旋ピッチはコイル軸の軸線方向において変化する形態であってもよい。具体的には、螺旋ピッチが上流端から下流端に向かって次第に小さくなる形態、螺旋ピッチが上流端から下流端に向かって次第に大きくなる形態と、螺旋ピッチが上流端部と下流端で大きい形態、螺旋ピッチが上流端と下流端で小さい形態、上流端から下流端に亘って螺旋ピッチの大きい部分と小さい部分が交互に連続する形態等が可能である。
（９）上記実施形態では共用供給路を構成するパイプがコイル軸方向において互いに離間するように螺旋ピッチが設定されていたが、共用供給路を構成するパイプはコイル軸方向において互いに当接する形態、即ち密着巻きのコイル状であってもよい。
（１０）上記実施形態では共用供給路を構成するパイプが円形に螺旋巻きされた形態であったが、パイプは非円形（例えば、楕円形、長円形、略多角形など）に螺旋巻きされた形態であってもよい。
（１１）上記実施形態では共用供給路を構成するパイプの横断面形状を円形としたが、パイプの断面形状は非円形（例えば、楕円形、長円形、略方形）であってもよい。
（１２）上記実施形態では共用供給路をコイル状としたが、共用供給路は、波形をなしていてもよい。この場合の波形としては、正弦波形、半円形が連続する波形、方形が連続する波形などが可能である。 <Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above-described embodiment, the volume of the flow path for one coil in the common supply path is defined as the amount of the main agent and the curing agent input in one cycle (one main agent input amount and one hardener input amount). However, according to the present invention, the volume of the flow path for one turn of the coil may be larger than the input amount of one cycle of the main agent and the curing agent.
(2) The volume of the flow path for one turn of the coil in the shared supply path may be smaller than the input amount of one cycle of the main agent and the curing agent. In this case, the volume of the flow path for one turn of the coil may be an amount larger or smaller than a single charge of the main agent, and an amount larger than a single charge of the curing agent. There may be a small amount.
(3) In the above-described embodiment, the common supply path is fixed so as not to expand and contract in the axial direction of the coil axis. However, the shared supply path may be elastically expandable and contractable in the axial direction of the coil axis.
(4) In the above-described embodiment, the common supply path is configured not to be elastically deformed so as to bend the axis of the coil shaft. It may be a thing.
(5) In the above embodiment, the common supply path is fixed so as to keep the axis of the coil axis horizontal, but the shared supply path may be fixed in a form in which the coil axis is inclined with respect to the horizontal. It is also possible to adopt a form in which the posture can be tilted so that the coil axis is inclined with respect to the horizontal.
(6) In the above-described embodiment, the shared supply path has a shape in which the coil axis forms a straight line, but the shared supply path may have a shape in which the coil axis is curved.
(7) In the above embodiment, the coil diameter is constant from the upstream end to the downstream end of the common supply path, but the coil diameter may be changed in the axial direction of the coil axis. Specifically, the coil diameter gradually decreases from the upstream end toward the downstream end, the coil diameter gradually increases from the upstream end toward the downstream end, and the coil diameter increases at the upstream end and the downstream end. A configuration in which the coil diameter is small at the upstream end and the downstream end, a configuration in which a portion having a large coil diameter and a small portion are alternately continued from the upstream end to the downstream end, and the like are possible.
(8) In the above embodiment, the spiral pitch of the shared supply path is constant from the upstream end to the downstream end, but the spiral pitch of the shared supply path may vary in the axial direction of the coil axis. Specifically, a form in which the helical pitch gradually decreases from the upstream end toward the downstream end, a form in which the helical pitch gradually increases from the upstream end toward the downstream end, and a form in which the helical pitch increases at the upstream end and the downstream end. A configuration in which the spiral pitch is small at the upstream end and the downstream end, a configuration in which a portion with a large spiral pitch and a portion with a small spiral pitch are alternately continued from the upstream end to the downstream end, and the like are possible.
(9) In the above embodiment, the spiral pitch is set so that the pipes constituting the shared supply path are separated from each other in the coil axis direction, but the pipes constituting the shared supply path are in contact with each other in the coil axis direction, That is, it may be in the form of a closely wound coil.
(10) In the above embodiment, the pipe constituting the common supply path is spirally wound in a circular shape, but the pipe is spirally wound in a non-circular shape (for example, oval, oval, substantially polygonal, etc.) Form may be sufficient.
(11) In the above embodiment, the cross-sectional shape of the pipe constituting the common supply path is circular, but the cross-sectional shape of the pipe may be non-circular (for example, oval, oval, or substantially square).
(12) In the above embodiment, the shared supply path is coiled, but the shared supply path may have a waveform. The waveform in this case can be a sine waveform, a waveform with a continuous semicircle, a waveform with a continuous square, or the like.

実施形態１の構成図Configuration diagram of Embodiment 1 共用供給路の一部切欠部分拡大図Partial cutaway enlarged view of the common supply path

符号の説明Explanation of symbols

１０…主剤用供給路
１１…硬化剤用供給路
１２…共用供給路
１３…スタティックミキサ
１４…塗装ガン
２６…低所流路
２７…高所流路 DESCRIPTION OF SYMBOLS 10 ... Supply path for main agents 11 ... Supply path for hardening agents 12 ... Common supply path 13 ... Static mixer 14 ... Paint gun 26 ... Low channel 27 ... High channel

Claims (2)

主剤を圧送するための専用の主剤用供給路と、
主剤とは比重が異なる硬化剤を圧送するための専用の硬化剤用供給路と、
内径が全長に亘って一定であって、上流端に前記主剤用供給路の下流端と前記硬化剤用供給路の下流端とが接続された共用供給路と、
前記共用供給路の下流端に接続されたスタティックミキサとを備え、
前記共用供給路の上流端に交互投入された主剤と硬化剤が、その界面を先細りの筍状に変形させながら同心円状の多数層に積層するように前記共用供給路内で分配された後、前記スタティックミキサを通過する過程で混合されることによって混合塗料が得られ、その混合塗料を塗装ガンに供給するようになっている混合塗料の供給装置であって、
前記共用供給路は、複数の低所流路と前記複数の低所流路よりも高い位置に配された複数の高所流路とが交互に並んだ形態となっていて、
前記塗装ガンへの混合塗料の供給が中断されると、主剤と硬化剤のうち比重の大きい側の液剤が前記低所流路内に沈み、比重の小さい側の液剤が前記高所流路内で浮いた状態となることを特徴とする混合塗料の供給装置。 A dedicated main agent supply path for pumping the main agent,
A dedicated curing agent supply path for pumping a curing agent having a specific gravity different from that of the main agent,
A common supply path in which an inner diameter is constant over the entire length, and a downstream end of the main agent supply path and a downstream end of the curing agent supply path are connected to an upstream end;
A static mixer connected to the downstream end of the common supply path,
After the main agent and the curing agent alternately charged at the upstream end of the shared supply path are distributed in the shared supply path so as to be stacked in concentric multiple layers while deforming the interface into a tapered bowl shape, said to be mixed in the process of passing through the static mixer thus coating mix is obtained, a by which the supply device of the mixed coating material adapted to provide the coating mix to the spray gun,
The shared supply path is a form in which a plurality of low flow paths and a plurality of high flow paths arranged at higher positions than the plurality of low flow paths are alternately arranged ,
When the supply of the mixed paint to the coating gun is interrupted, the liquid agent having the higher specific gravity of the main agent and the curing agent sinks into the low passage, and the liquid agent having the lower specific gravity flows into the high passage. A device for supplying a mixed paint, characterized in that it is in a floating state . 前記共用供給路が、コイル状流路を備えており、
前記コイル状流路におけるコイル一巻き分の流路の容積が、主剤と硬化剤の１サイクルの投入量と同じ量に設定されていることを特徴とする請求項１記載の混合塗料の供給装置。 The shared supply path includes a coiled flow path;
2. The mixed paint supply device according to claim 1, wherein the volume of the coil for one turn of the coil-shaped channel is set to be the same as the amount of the main agent and the curing agent charged in one cycle. .
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