JP2728798B2 - Paint supply device - Google Patents
Paint supply deviceInfo
- Publication number
- JP2728798B2 JP2728798B2 JP9654091A JP9654091A JP2728798B2 JP 2728798 B2 JP2728798 B2 JP 2728798B2 JP 9654091 A JP9654091 A JP 9654091A JP 9654091 A JP9654091 A JP 9654091A JP 2728798 B2 JP2728798 B2 JP 2728798B2
- Authority
- JP
- Japan
- Prior art keywords
- paint
- pressure
- cleaning
- cleaning liquid
- gear pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Coating Apparatus (AREA)
- Nozzles (AREA)
- Spray Control Apparatus (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、色替え装置，塗料配
管，塗料用ギヤポンプ等を含み形成された塗料供給装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint supply device including a color changing device, a paint pipe, a paint gear pump, and the like.
【０００２】[0002]
【従来の技術】図４に、塗料用ギヤポンプ２０を用いた
塗料供給装置の一般的構成を示す。同図において、１０
は色替え装置で、マニホールド１１にＸ（例えば赤）色
用カラーチェンジバルブＣＶｘ，Ｙ（例えば白）色用カ
ラーチェンジバルブＣＶｙ，エアーチェンジバルブＣＶ
ａ，洗浄液チェンジバルブＣＶｗを取り付けてなる。２
０は塗料用ギヤポンプで、上流側は塗料配管１３で色替
え装置１０と接続され、かつ下流側は塗料配管１４で供
給先（スプレーガン）１００に接続されている。ギヤポ
ンプ２０は、いわゆるエアオペレーション型に対して定
量的精度が高い。これを塗料供給系に採用する例として
は、特開昭５７−１６５６８５号，実開昭６０−１７８
３８１号公報が挙げられる。また、エアーチェンジバル
ブＣＶａには圧搾空気源１２が接続され、洗浄液チェン
ジバルブＣＶｗには配管３２を介して塗料洗浄液の供給
源３１が接続されている。2. Description of the Related Art FIG. 4 shows a general configuration of a paint supply apparatus using a paint gear pump 20. As shown in FIG. In the figure, 10
Is a color change device, and a color change valve CVx for X (for example, red) color, a color change valve CVy for Y (for example, white) color, and an air change valve CV are provided in the manifold 11.
a, A cleaning liquid change valve CVw is attached. 2
Reference numeral 0 denotes a paint gear pump. The upstream side is connected to a color changing device 10 by a paint pipe 13, and the downstream side is connected to a supply destination (spray gun) 100 by a paint pipe 14. The gear pump 20 has a higher quantitative accuracy than a so-called air operation type. Japanese Patent Application Laid-Open No. 57-165885 and Japanese Utility Model Application Laid-open No. Sho 60-178 disclose examples of using this in a paint supply system.
381 publication. The compressed air source 12 is connected to the air change valve CVa, and the supply source 31 of the paint cleaning liquid is connected to the cleaning liquid change valve CVw via a pipe 32.
【０００３】かかる塗料供給装置では、色替え装置１０
のＸ色用チェンジバルブＣＶｘとエアーチェンジバルブ
ＣＶａを開放すれば、Ｘ色塗料が塗料配管１３を通して
ギヤポンプ２０に送られる。ここに、駆動軸２２を回動
させれば、両ギヤ２３，２６（従動軸２５）の協働によ
り、Ｘ色塗料を塗料配管１４を通してスプレーガン１０
０に定量づつ供給できる。In such a paint supply device, a color changing device 10 is used.
When the X color change valve CVx and the air change valve CVa are opened, the X color paint is sent to the gear pump 20 through the paint pipe 13. Here, if the drive shaft 22 is rotated, the X-color paint is passed through the paint pipe 14 by the cooperation of the two gears 23 and 26 (the driven shaft 25).
It can be supplied to 0 at a fixed rate.
【０００４】次に、Ｙ色塗料に切替えるには、両チェン
ジバルブＣＶｘ，ＣＶａを閉鎖し、洗浄液チェンジバル
ブＣＶｗを開放する。すると、供給源３１から圧力Ｐ
（例えば１〜５ｋｇ／ｃｍ2 ｇ）の塗料洗浄液（例え
ば、シンナー）がマニホールド１１内に噴入される。つ
まり、塗料供給系〔１１，１３，２０（２３，２６），
１４〕を洗浄し、前に使用したＸ色塗料を洗浄払拭でき
る。図４中の３０は塗料供給系の洗浄系を示す。その
後、先と同じようにＹ色用チェンジバルブＣＶｙとエア
ーチェンジバルブＣＶａとを開放すれば、Ｙ色塗料をス
プレーガン１００に供給することができる。Next, in order to switch to the Y color paint, both change valves CVx and CVa are closed and the cleaning liquid change valve CVw is opened. Then, the pressure P from the supply source 31
A paint cleaning liquid (for example, 1 to 5 kg / cm 2 g) (for example, thinner) is injected into the manifold 11. That is, the paint supply system [11, 13, 20 (23, 26),
14], and the previously used X-color paint can be washed and wiped off. Reference numeral 30 in FIG. 4 indicates a cleaning system of the paint supply system. Thereafter, by opening the Y color change valve CVy and the air change valve CVa as before, the Y color paint can be supplied to the spray gun 100.
【０００５】ところで、上記洗浄工程は、迅速かつ前使
用塗料（Ｘ色）が残らないように完全に行わなければな
らない。ここに、従来は、洗浄時にはギヤポンプ２０を
通常の塗料供給運転時の回転速度よりも高速回転させ、
かつバイパス配管３４とバイパス弁３３とを設けて、塗
料配管１３，１４に多量の洗浄液を流通させることによ
り、迅速洗浄を図っている。一方、完全性つまり残色を
一掃するために、ギヤポンプ２０の特にギヤ２３，２６
の側面に付着した前色（上記場合にはＸ色）塗料をも洗
浄するものとしている。このために、ギヤポンプ２０の
駆動軸２２内を通し洗浄液を注入するギヤ洗浄系４０を
設けている。By the way, the above-mentioned washing step must be carried out promptly and completely so as not to leave the paint (X color) used before. Here, conventionally, at the time of washing, the gear pump 20 is rotated at a higher speed than the rotation speed at the time of the normal paint supply operation,
In addition, a bypass pipe 34 and a bypass valve 33 are provided to allow a large amount of cleaning liquid to flow through the paint pipes 13 and 14 for quick cleaning. On the other hand, in order to clean up the integrity, that is, the residual color, the gear pump 20, especially the gears 23, 26
The pre-color (X color in the above case) paint adhered to the side surface is also cleaned. For this purpose, a gear cleaning system 40 for injecting the cleaning liquid through the drive shaft 22 of the gear pump 20 is provided.
【０００６】すなわち、図５に示すように、ギヤポンプ
２０の駆動軸２２に注入流路４１（分岐細孔４１ａ）、
従動軸２５に戻り流路４３（分岐細孔４３ａ）を設け、
両者４１，４３をケーシング２１内の連通流路４２で連
通させている。そして、注入流路４１には、図４に示す
ように、洗浄弁４６を有する配管４５，４７を連結して
いる。また、戻り流路４３には外部へ排出させる配管４
９が接続されている。この洗浄液の供給源は、設備経
済，取扱性の観点から、塗料供給系（１１，１３，２
０，１４）の洗浄液の上記供給源３１を共用するよう構
築するのが一般的である。That is, as shown in FIG. 5, the injection shaft 41 (branch small hole 41 a) is formed in the drive shaft 22 of the gear pump 20.
A return channel 43 (branch pore 43a) is provided in the driven shaft 25,
The two 41 and 43 are communicated with each other through a communication channel 42 in the casing 21. Then, pipes 45 and 47 having a cleaning valve 46 are connected to the injection flow path 41 as shown in FIG. In addition, a pipe 4 for discharging to the outside is provided in the return channel 43.
9 is connected. The supply source of this cleaning liquid is a paint supply system (11, 13, 2) from the viewpoint of equipment economy and handling.
It is general to construct the supply source 31 of the cleaning liquid (0, 14) in common.
【０００７】かくして、色替え（Ｘ色→Ｙ色）間に、洗
浄弁４６を開放すれば、配管４５，４７を介して供給源
３１から供給された洗浄液は、駆動軸２２の注入流路４
１，分岐細孔４１ａを通しギヤ２３，２６の側面等に付
着した前色塗料を払拭しつつ分岐細孔４３ａ，戻り流路
４３を通して外部に排出される。但し、一部は、ギヤポ
ンプ２０のギヤ２３，２６の歯部および吐出部２８を通
して、下流側塗料配管１４に排出される。このように、
各洗浄系３０，４０を用いて、ギヤポンプ２０を通常よ
りも高速回転しつつ塗料供給系（１１，１３，２０，１
４）を迅速洗浄し、かつギヤ２３、２６の側面等に付着
した塗料をも完全洗浄している。Thus, if the cleaning valve 46 is opened during the color change (X → Y), the cleaning liquid supplied from the supply source 31 via the pipes 45 and 47 causes the cleaning liquid supplied from the supply shaft 4 of the drive shaft 22 to flow.
First, the precolor paint adhered to the side surfaces of the gears 23 and 26 through the branch pore 41a is wiped off, and is discharged to the outside through the branch pore 43a and the return flow path 43. However, a part is discharged to the downstream paint pipe 14 through the teeth of the gears 23 and 26 of the gear pump 20 and the discharge section 28. in this way,
Using each of the cleaning systems 30, 40, the gear pump 20 is rotated at a higher speed than usual and the paint supply system (11, 13, 20, 1, 1) is rotated.
4) is quickly cleaned, and the paint adhered to the side surfaces of the gears 23 and 26 is also completely cleaned.
【０００８】[0008]
【発明が解決しようとする課題】ところで、かかる高速
かつ完全洗浄の策を施しても、過剰設備とすることな
く、かつ切替後にいささかの残色も許容し難いという運
用の実際を満足しつつ、色替えを一層高速に、すなわち
例えば１０〜２０ｓｅｃ以内で迅速に行いたいという今
日的要請を満すことができない。By the way, even if such a high-speed and complete cleaning measure is taken, it is possible to satisfy the practice of operation without excessive facilities and not allowing some residual color after switching. It is not possible to satisfy today's demand for faster color change, that is, for example, quickly within 10 to 20 seconds.
【０００９】ここに、上記両公報等において提案されて
いる通り、エアオペレーション型に対し高精度定量供給
という優位性を持ちつつも、ギヤポンプ２０を採用した
塗料供給装置が普及拡大されていない原因となっている
のが実状である。Here, as proposed in the above-mentioned publications and the like, the reason why the paint supply apparatus employing the gear pump 20 has not been widely used while having the advantage of high-precision quantitative supply over the air operation type. The fact is that it is.
【００１０】本発明の目的は、塗料供給系とギヤ側面等
との洗浄を迅速に行い残色無く高速で色替えを行える塗
料供給装置を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a paint supply apparatus capable of quickly cleaning a paint supply system and a gear side surface and performing color change at a high speed without residual color.
【００１１】[0011]
【課題を解決するための手段】本発明は、塗料供給系
（１１，１３，２０，１４）の洗浄迅速化達成に最も有
効な策を施す程に、すなわちギヤポンプ２０の洗浄運転
時回転速度を塗料供給運転時回転速度よりも一段と高め
る程に、色替え後の塗料色にその品質許容範囲を越る残
色（切替前塗料）が混在する確率が増大する傾向にある
という事実確認、並びにその原因が塗料供給系の構造に
あることつまり塗料配管１４が細管のところギヤポンプ
２０を高速回転すると、その吐出圧Ｐｂが図６に示す如
く、上流側圧力Ｐ（例えば、１〜５ｋｇ／ｃｍ2 ｇ）に
比較して非常に高いピーク圧力Ｐｐ（例えば、５〜２０
ｋｇ／ｃｍ2 ｇ）に急激に立上る結果、塗料分を含む汚
れた洗浄液がケーシング内ギヤ側面等を通し駆動軸２２
（注入流路４１）側に逆流する。すなわち、注入流路４
１等を汚染するのみならず、ギヤポンプ２０の吐出圧
（背圧）Ｐｂが、起動後例えば３〜７ｓｅｃ（ｔｐ）で
ピーク圧Ｐｐとなり、その後通常的圧力Ｐに戻った後
で、かつその汚れた洗浄液を塗料配管１４側に排出した
後でないとギヤ側面２３Ｓ，２６Ｓの洗浄が実質的に行
われないという試験研究結果、に基づき駆動軸２２内
（注入流路４１）への洗浄液の注入圧力を一時的にギヤ
ポンプ２０の吐出圧Ｐｂよりも高くすることによりその
逆流を防止する構成とし、前記目的を達成するものであ
る。According to the present invention, the rotational speed during the cleaning operation of the gear pump 20 is reduced so that the most effective measures are taken to achieve quick cleaning of the paint supply system (11, 13, 20, 14). The fact that the higher the rotation speed during the paint supply operation, the more likely that the paint color after color change will have a residual color (paint before switching) that exceeds the allowable range of quality tends to increase. If the cause is the structure of the paint supply system, that is, if the paint pump 14 is a thin tube and the gear pump 20 is rotated at a high speed, the discharge pressure Pb is increased as shown in FIG. 6 to the upstream pressure P (for example, 1 to 5 kg / cm 2 g). ), A very high peak pressure Pp (eg, 5-20
kg / cm 2 g), and as a result, the contaminated cleaning liquid containing the coating material passes through the gear side surface in the casing and the like and the drive shaft 22.
It flows backward to the (injection channel 41) side. That is, the injection channel 4
Not only does it contaminate 1 etc., but also the discharge pressure (back pressure) Pb of the gear pump 20 becomes the peak pressure Pp, for example, 3 to 7 seconds (tp) after startup, and then returns to the normal pressure P, and The injection pressure of the cleaning liquid into the drive shaft 22 (injection flow path 41) is based on the results of a test study that the gear side surfaces 23S and 26S are not substantially cleaned unless the cleaning liquid is discharged to the paint pipe 14 side. Is temporarily set to be higher than the discharge pressure Pb of the gear pump 20 to prevent the backflow, thereby achieving the above object.
【００１２】すなわち、色替え装置と塗料配管と塗料用
のギヤポンプとを含み構成され、色替え間に高速回転さ
せたギヤポンプに色替え装置側から塗料洗浄液を供給し
て塗料供給系を洗浄可能、かつ駆動軸内を通して塗料洗
浄液を注入しつつギヤポンプ内のギヤ側面を洗浄可能に
形成された塗料供給装置において、前記駆動軸と塗料洗
浄液の供給源との間に洗浄液増圧手段を配設し、かつ洗
浄開始時からギヤポンプの吐出圧がピーク圧力に到達す
る迄の間に洗浄液増圧手段を増圧起動開始させる駆動制
御手段を設けたことを特徴とする。In other words, it is possible to wash the paint supply system by supplying a paint washing liquid from the color changing device side to the gear pump rotated at a high speed during the color change, comprising a color changing device, a paint pipe and a gear pump for the paint. And in a paint supply device formed so as to be able to wash the gear side surface in the gear pump while injecting the paint washing liquid through the inside of the drive shaft, disposing a washing liquid pressure increasing means between the drive shaft and a supply source of the paint washing liquid, Further, a drive control means is provided for starting the pressure increase of the cleaning liquid pressure increasing means from the start of the cleaning to the time when the discharge pressure of the gear pump reaches the peak pressure.
【００１３】[0013]
【作用】本発明では、色替え間において、洗浄液チェン
ジバルブを開き洗浄開始すると、洗浄液供給源から高速
回転されたギヤポンプに洗浄液が供給され、塗料供給系
を洗浄できる。この際、駆動制御手段は、洗浄開始時か
らギヤポンプの吐出圧がピーク圧力となる迄の間に、洗
浄液増圧手段を増圧起動開始させ、駆動軸内（注入流
路）に増圧された洗浄液を注入する。In the present invention, when the cleaning liquid change valve is opened and cleaning is started between color changes, the cleaning liquid is supplied from the cleaning liquid supply source to the gear pump rotated at high speed, and the paint supply system can be cleaned. At this time, the drive control means starts the pressure increase of the cleaning liquid pressure increasing means from the start of cleaning to the time when the discharge pressure of the gear pump reaches the peak pressure, and the pressure is increased in the drive shaft (injection flow path). Inject the cleaning solution.
【００１４】したがって、ギヤポンプ内では、駆動軸
（注入流路）を通して注入された洗浄液圧力の方がポン
プ吐出圧よりも高いから、塗料供給系から汚れた洗浄液
が注入流路側に逆流しない。つまり、駆動軸から注入さ
れた洗浄液は、直ちにギヤ側面等を洗浄することができ
る。よって、塗料供給系とギヤ側面等とを同時的に洗浄
できるから、全体として大幅な洗浄用時間短縮が図れか
つ色替え後の塗料に切替前の塗料が混在する事態を一掃
できる。Therefore, in the gear pump, the pressure of the cleaning liquid injected through the drive shaft (injection flow path) is higher than the discharge pressure of the pump, so that the dirty cleaning liquid from the paint supply system does not flow back to the injection flow path side. That is, the cleaning liquid injected from the drive shaft can immediately clean the gear side surface and the like. Therefore, since the paint supply system and the gear side surface can be washed at the same time, the cleaning time can be greatly reduced as a whole, and the paint after the color change and the paint before the switching can be eliminated.
【００１５】[0015]
【実施例】以下、本発明の実施例を図面を参照して説明
する。本塗料供給装置は、図１，図２に示すように、基
本構成が色替え装置１０，塗料用ギヤポンプ２０，塗料
配管１３，１４等を含み形成された前出図４，図５に示
す従来例と同じとされ、かつ洗浄液増圧手段５０と駆動
制御手段（６０，７０）とを備え、塗料供給系（１１，
１３，２０，１４）とギヤ（２３，２６）の側面（２３
Ｓ，２６Ｓ）等とを同時的に洗浄できるように構成され
ている。なお、色替え装置１０，ギヤポンプ２０等々、
従来例と同一または共通部分については同一の符号を付
しその説明を省略する。Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the paint supply apparatus of the present invention has a basic structure including a color changing device 10, a paint gear pump 20, paint pipes 13 and 14, and the like. It is the same as the example, and includes the cleaning liquid pressure increasing means 50 and the drive control means (60, 70), and the paint supply system (11,
13, 20, 14) and side faces (23) of gears (23, 26).
S, 26S) and the like can be simultaneously cleaned. The color changing device 10, the gear pump 20, etc.
The same reference numerals are given to the same or common parts as in the conventional example, and the description is omitted.
【００１６】さて、洗浄液増圧手段５０は、図１に示す
ように、ギヤポンプ２０の駆動軸２２内に設けられた注
入流路４１へ注入する洗浄液を一時的に増圧する手段
で、塗料洗浄液の供給源（３１）との間に配設されてい
る。この実施例における洗浄液増圧手段５０は、大径シ
リンダ装置５１（シリンダ５２，断面積Ａ１のピストン
５３，加圧室５４）と小径シリンダ装置５５（シリンダ
５６，断面積Ａ２のピストン５７，増圧室５８）との両
ピストン５３，５７を、ピストンロッド５９で連結した
構成とされている。増圧率はＡ１／Ａ２として決まる。
なお、この洗浄液増圧手段５０は、この型に限定され
ず、例えばダイヤフラム弁構造等から構成してもよい。
したがって、加圧室５４内に液供給源３１から圧力が例
えば、１〜５Ｋｇ／ｃｍ2 ｇの洗浄液を加えれば、増圧
室５８内の洗浄液を増圧率Ａ１／Ａ２に基づき高い圧力
（例えば、５〜２０Ｋｇ／ｃｍ2 ｇ）に増圧することが
できる。As shown in FIG. 1, the cleaning liquid pressure increasing means 50 is a means for temporarily increasing the pressure of the cleaning liquid injected into the injection flow path 41 provided in the drive shaft 22 of the gear pump 20. It is arranged between the supply source (31). The cleaning liquid pressure increasing means 50 in this embodiment includes a large-diameter cylinder device 51 (cylinder 52, a piston 53 having a sectional area A1 and a pressurizing chamber 54) and a small-diameter cylinder device 55 (a cylinder 56, a piston 57 having a sectional area A2, The two pistons 53 and 57 with the chamber 58) are connected by a piston rod 59. The pressure increase rate is determined as A1 / A2.
Note that the cleaning liquid pressure increasing means 50 is not limited to this type, and may be constituted by a diaphragm valve structure or the like, for example.
Therefore, when a cleaning liquid having a pressure of, for example, 1 to 5 Kg / cm 2 g is added from the liquid supply source 31 to the pressurizing chamber 54, the cleaning liquid in the pressure increasing chamber 58 is increased to a high pressure (for example, based on the pressure increasing rate A1 / A2). , 5 to 20 Kg / cm 2 g).
【００１７】ここに、洗浄液増圧手段５０を設ける理由
は、駆動軸２２（注入流路４１）へ注入する洗浄液の供
給源を、塗料供給系（１１，１３，２０，１４）の洗浄
用液供給源３１と共用した方が設備経済上も取扱上も有
利であることによる。また、この洗浄液増圧手段５０
は、高速回転ＨＳされたギヤポンプ２０の吐出圧Ｐｂが
ピーク圧力（５〜２０Ｋｇ／ｃｍ2 ｇ）になるまでの短
時間〔図６の０〜ｔｐ（３〜７ｓｅｃ）〕だけ逆流防止
のために増圧動作させればよく、かつその増圧液量は図
５に示す分岐細孔４１ａ，４３ａを流通させる小量でよ
いから、構造簡単で小型かつ低コストのものとして構築
することができるからである。The reason for providing the cleaning liquid pressure increasing means 50 is that the supply source of the cleaning liquid to be injected into the drive shaft 22 (the injection flow path 41) is the cleaning liquid for the paint supply system (11, 13, 20, 14). This is because sharing with the supply source 31 is advantageous in terms of equipment economy and handling. Further, this cleaning liquid pressure increasing means 50
In order to prevent backflow for a short time (0 to tp (3 to 7 sec) in FIG. 6) until the discharge pressure Pb of the gear pump 20 rotated at high speed HS reaches the peak pressure (5 to 20 Kg / cm 2 g). The pressure increasing operation may be performed, and the amount of the pressure increasing liquid may be small enough to flow through the branch pores 41a and 43a shown in FIG. 5, so that it can be constructed as a simple structure, small size and low cost. It is.
【００１８】次に、駆動制御手段は、洗浄液チェンジバ
ルブＣＶｗを開いて洗浄開始した時から、すなわちこの
実施例では上記理由からギヤポンプ２０を高速回転ＨＳ
させたときから、その吐出圧Ｐｂが図６に示すピーク圧
力Ｐｐに到達する迄の間に、洗浄液増圧手段５０を増圧
起動開始させる手段であり、この実施例では図１の切替
弁構造６０と図２の制御盤７０とからなる。なお、洗浄
液増圧手段５０の増圧起動開始とは、その増圧動作期間
をいうのでなく、増圧動作を開始することをいう。つま
り、増圧動作期間はピーク圧力Ｐｐを越えても、さらに
は吐出圧Ｐｂが図６の通常的圧力Ｐに低下するまで続行
させてもよい。この実施例では、図３に示す如く、ギヤ
ポンプ２０を通常運転中の回転速度（ＮＳ）から高速回
転（ＨＳ）に切替える（時刻ｔ１）、すなわち洗浄液チ
ェンジバルブＣＶｗを開放した洗浄開始時と同時に増圧
起動開始させ、ピーク圧力Ｐｐに到達する時刻ｔｐを過
ぎても吐出圧Ｐｂが逆流を起し得ない圧力となるまで、
つまり時刻ｔ２まで増圧動作させるよう形成している。Next, the drive control means starts the cleaning operation by opening the cleaning liquid change valve CVw, that is, in this embodiment, for the reason described above, the gear pump 20 is rotated at a high speed HS.
This is a means for starting the pressure increase of the cleaning liquid pressure increasing means 50 from the time when the discharge pressure Pb reaches the peak pressure Pp shown in FIG. 6, and in this embodiment, the switching valve structure of FIG. 60 and the control panel 70 of FIG. The start of the pressure increase of the cleaning liquid pressure increasing means 50 does not refer to the pressure increase operation period, but refers to the start of the pressure increase operation. In other words, the pressure increasing operation period may exceed the peak pressure Pp, or may be continued until the discharge pressure Pb decreases to the normal pressure P in FIG. In this embodiment, as shown in FIG. 3, the speed of the gear pump 20 is switched from the rotation speed (NS) during normal operation to the high speed rotation (HS) (time t1), that is, the gear pump 20 increases at the same time as the start of cleaning when the cleaning liquid change valve CVw is opened. Until the discharge pressure Pb becomes a pressure at which the backflow cannot occur even after the time tp at which the pressure reaches the peak pressure Pp.
That is, the pressure increasing operation is performed until time t2.
【００１９】さて、切替弁構造６０は、図１に示すよう
に、大径シリンダ装置５１の加圧室５４へ供給源３１か
らの洗浄液を供給・遮断する加圧供給弁６１と、小径シ
リンダ装置５５の増圧室５８からの増圧された洗浄液を
ギヤポンプ２０の駆動軸２２（注入流路４１）へ注入・
遮断する増圧供給弁６２と、供給源３１と増圧室５８と
を結ぶ配管６４に設けられた充填弁６３とを含み形成さ
れている。また、増圧室５８への洗浄液充填時における
加圧室５４の洗浄液は、図１に２点鎖線で示す方向に逃
がされ図示しない回収タンクに回収されるものと形成さ
れている。As shown in FIG. 1, the switching valve structure 60 includes a pressurized supply valve 61 for supplying and shutting off the cleaning liquid from the supply source 31 to the pressurized chamber 54 of the large diameter cylinder device 51, and a small diameter cylinder device. The pressure-increased cleaning liquid from the pressure-increasing chamber 58 is injected into the drive shaft 22 (injection channel 41) of the gear pump 20.
It is formed to include a pressure-intensifying supply valve 62 that shuts off, and a filling valve 63 that is provided in a pipe 64 that connects the supply source 31 and the pressure-increasing chamber 58. Further, the cleaning liquid in the pressurizing chamber 54 when the pressure increasing chamber 58 is filled with the cleaning liquid is released in a direction shown by a two-dot chain line in FIG. 1 and is recovered in a recovery tank (not shown).
【００２０】一方、制御盤７０は、この切替弁構造６０
（６１，６２，６３）を適宜に開閉制御して、洗浄液増
圧手段５０を洗浄工程にマッチングして増圧動作させる
手段である。さらに、この制御盤７０は、この実施例の
場合、塗料色替え動作，塗料供給系（１１，１３，２
０，１４）の洗浄動作をも、駆動制御する機能をも有す
る。このため制御盤７０には、切替弁構造６０（６１，
６２，６３）の他に、Ｘ色チェンジバルブＣＶｘ，ギヤ
ポンプ２０の駆動モータ２２Ｍ，バイパス弁３３等々が
図２に示すように接続されている。On the other hand, the control panel 70 includes the switching valve structure 60
(61, 62, 63) is a means for appropriately controlling the opening and closing of the cleaning liquid to increase the pressure of the cleaning liquid pressure increasing means 50 in accordance with the cleaning process. Further, in the case of this embodiment, the control panel 70 performs a paint color changing operation and a paint supply system (11, 13, 2).
The cleaning operation of (0, 14) also has a function of driving control. For this reason, the control panel 70 includes the switching valve structure 60 (61, 61).
62, 63), an X color change valve CVx, a drive motor 22M of the gear pump 20, a bypass valve 33, and the like are connected as shown in FIG.
【００２１】なお、図２中の８０は、プログラム設定器
で、図３に示す手順で各弁等を切替え制御するシーケン
ス乃至プログラムを設定するものである。もっとも、こ
のプログラム設定器のもつ機能は、制御盤７０内に組込
んでもよい。In FIG. 2, reference numeral 80 denotes a program setting device for setting a sequence or a program for controlling the switching of each valve or the like in the procedure shown in FIG. However, the functions of the program setting device may be incorporated in the control panel 70.
【００２２】次に、作用を説明する。Ｘ色塗料供給から
Ｙ色塗料供給に色替えする場合を考える。制御盤７０
は、予め決められたプログラムに基づき、図３の時刻ｔ
１において、Ｘ色チェンジバルブＣＶｘおよびエアーチ
ェンジバルブＣＶａを閉鎖する。したがって、塗料供給
系（１１，１３，２０，１４）内には、Ｘ色塗料が残存
している。なお、Ｘ色塗料供給中、詳しくはＸ色チェン
ジバルブＣＶｘを閉鎖して洗浄工程に入る迄に、図３に
示すように充填弁６３を開放し、洗浄液増圧手段５０の
増圧室５８内に予め洗浄液を充填しておく。すなわち、
洗浄液増圧手段５０をスタンバイさせておく。この場
合、加圧室５４内の残液は図１で２点鎖線で示す方向に
逃がされる。Next, the operation will be described. A case is considered where the color is changed from the supply of the X-color paint to the supply of the Y-color paint. Control panel 70
Is a time t in FIG. 3 based on a predetermined program.
At 1, the X color change valve CVx and the air change valve CVa are closed. Therefore, the X-color paint remains in the paint supply system (11, 13, 20, 14). During the supply of the X-color paint, specifically, before the X-color change valve CVx is closed and the cleaning process is started, the filling valve 63 is opened as shown in FIG. Is previously filled with a cleaning liquid. That is,
The cleaning liquid pressure increasing means 50 is kept on standby. In this case, the residual liquid in the pressurizing chamber 54 is released in the direction shown by the two-dot chain line in FIG.
【００２３】ここに、制御盤７０は、Ｘ色チェンジバル
ブＣＶｘを閉鎖すると同時に、洗浄液チェンジバルブＣ
Ｖｗとバイパス弁３３とを開放し、かつギヤポンプ２０
を塗料供給運転時における通常的回転速度ＮＳより高速
ＨＳに切替える。すると、供給源３１からの比較的多量
の液は、洗浄液チェンジバルブＣＶｗ，マニホールド１
１，塗料配管１３中のＸ色塗料をバイパス配管３４を通
して、下流側の塗料配管１４へ排出しつつそれら内部を
洗浄する。また、ギヤポンプ２０内に残存するＸ色塗料
は、高速回転された駆動ギヤ２３，従動ギヤ２６のポン
プ作用により、塗料配管１４側に排出され、続いて上流
側塗料配管１３から供給された液で洗浄される。Here, the control panel 70 closes the X color change valve CVx, and at the same time, the cleaning liquid change valve CVx.
Vw and the bypass valve 33 are opened, and the gear pump 20
Is switched to the high speed HS from the normal rotation speed NS during the paint supply operation. Then, a relatively large amount of liquid from the supply source 31 is supplied to the cleaning liquid change valve CVw and the manifold 1.
1. While discharging the X color paint in the paint pipe 13 through the bypass pipe 34 to the paint pipe 14 on the downstream side, the inside of the paint is washed. Further, the X-color paint remaining in the gear pump 20 is discharged to the paint pipe 14 side by the pump action of the drive gear 23 and the driven gear 26 rotated at high speed, and is subsequently supplied from the upstream paint pipe 13 by a liquid. Washed.
【００２４】しかし、ギヤポンプ２０を高速回転ＨＳす
ると、下流側塗料配管１４は細くかつ管１４内には先の
Ｘ色残存塗料および洗浄用液が未だ詰っているので、そ
の吐出圧Ｐｂは、図６に示す如く、一時的かつ急激に圧
力上昇する。したがって、この状態を放置すると、ケー
シング２１内の塗料と洗浄液との混合汚液が、ギヤ側面
２３Ｓ，２６Ｓ、分岐細孔４１ａ，４３ａを通し、注入
流路４１，戻り流路４３に逆流する。この場合、戻り流
路４３への排出は問題ないが、注入流路４１内への逆流
は、管４１内を汚すばかりか配管４５内にも侵入してし
まう。また、場合によっては洗浄により塗料供給系（１
１，１３，２０，１４）内から除去した塗料が分岐細孔
４１ａ，４３ａに目詰まりする問題も生じる。However, when the gear pump 20 is rotated at a high speed HS, the downstream paint pipe 14 is thin and the X-color remaining paint and the cleaning liquid are still clogged in the pipe 14. As shown in FIG. 6, the pressure rises temporarily and rapidly. Therefore, when this state is left, the mixed sewage of the paint and the cleaning liquid in the casing 21 flows back through the gear side surfaces 23S and 26S and the branch fine holes 41a and 43a to the injection flow path 41 and the return flow path 43. In this case, although there is no problem in discharging to the return channel 43, the backflow into the injection channel 41 not only stains the pipe 41 but also enters the pipe 45. In some cases, the paint supply system (1
1, 13, 20, 14) also causes a problem that the paint removed from the inside clogs the branched pores 41a, 43a.
【００２５】このため、洗浄弁４６を開放して、共通供
給源３１からの洗浄液を、駆動軸２２の注入流路４１内
に注入しても意味がない。つまり、ギヤポンプ２０の吐
出圧Ｐｂが高い期間中に、注入流路４１内に洗浄液を注
入しても、ギヤ側面２３Ｓ，２６Ｓの洗浄を行うことが
できない。実質的洗浄は吐出圧Ｐｂが低下した後に行わ
れるから、ギヤ側面２３Ｓ，２６Ｓの有効洗浄時間が短
かすぎて十分な洗浄が達成されない。Therefore, there is no point in opening the cleaning valve 46 and injecting the cleaning liquid from the common supply source 31 into the injection flow path 41 of the drive shaft 22. That is, even if the cleaning liquid is injected into the injection channel 41 during the period when the discharge pressure Pb of the gear pump 20 is high, the gear side surfaces 23S and 26S cannot be cleaned. Since the substantial cleaning is performed after the discharge pressure Pb decreases, the effective cleaning time of the gear side surfaces 23S and 26S is too short to achieve sufficient cleaning.
【００２６】ここに、ギヤポンプ２０を図３の時刻ｔ１
で高速回転ＨＳに切替えると同時に、加圧供給弁６１と
増圧注入弁６２とを開放して洗浄液増圧手段５０を増圧
起動開始する。すなわち、大径シリンダ装置５１の加圧
室５４内には、加圧供給弁６１を通し供給源３１から洗
浄液が供給され、ピストン５３（ピストンロッド５９）
は図１で右方向に押圧移動される。すると、小径シリン
ダ装置５５の増圧室５８内の洗浄液は、増圧率Ａ１／Ａ
２に基づき、増圧される。この増圧された洗浄液は、既
に開放された増圧注入弁６２，配管４５を通し、駆動軸
２２に設けた注入流路４１内に注入される。Here, the gear pump 20 is turned on at time t1 in FIG.
At the same time, the pressurizing supply valve 61 and the pressure increasing injection valve 62 are opened to start the pressure increasing means 50 of the cleaning liquid pressure increasing means. That is, the cleaning liquid is supplied from the supply source 31 through the pressurized supply valve 61 into the pressurized chamber 54 of the large-diameter cylinder device 51, and the piston 53 (piston rod 59) is supplied.
Is moved rightward in FIG. Then, the cleaning liquid in the pressure increasing chamber 58 of the small diameter cylinder device 55 has a pressure increasing rate A1 / A.
2, the pressure is increased. The pressurized cleaning liquid is injected into the injection channel 41 provided on the drive shaft 22 through the pressure-injection injection valve 62 and the pipe 45 that have been opened.
【００２７】したがって、注入された洗浄液は、ケーシ
ング２１内圧力（Ｐｂ）に打勝って、分岐細孔４１ａ，
４３ａを通してケーシング２１内、特にギヤ側面２３
Ｓ，２６Ｓを流れ、側面２３Ｓ，２６Ｓを洗浄する。そ
して、配管４９に排出され、また、一部は加圧部２８を
通して下流側塗料配管１４内に排出される。つまり、塗
料供給系（１１，１３，２０，１４）とギヤ側面２３
Ｓ，２６Ｓとを同時的に洗浄できる。Therefore, the injected cleaning liquid overcomes the internal pressure (Pb) of the casing 21 and the branched pores 41a, 41b.
43a through the casing 21, especially the gear side surface 23.
S, 26S flows to clean the side surfaces 23S, 26S. Then, it is discharged to the pipe 49, and a part is discharged to the downstream paint pipe 14 through the pressurizing section 28. That is, the paint supply system (11, 13, 20, 14) and the gear side surface 23
S and 26S can be washed simultaneously.
【００２８】しかし、ギヤポンプ２０の吐出圧Ｐｂが、
図６に示す如く、通常的圧力Ｐに低下した場合にまで、
増圧動作を続行させる必要性はない。そこで、この実施
例では、吐出圧Ｐｂがピーク圧力Ｐｐとなる図３の時刻
ｔｐより以降の時刻ｔ２になると、制御盤７０は加圧供
給弁６１と増圧注入弁６２とを閉鎖する。しかし、塗料
供給系（１１，１３，２０，１４）の洗浄中は、ギヤ側
面２３Ｓ，２６Ｓの洗浄を続けることが望ましい。そこ
で、制御盤７０は、加圧供給弁６１，増圧注入弁６２を
閉鎖（時刻ｔ２）すると同時的に、洗浄弁４６を開放す
る。すると、注入流路４１には、洗浄液増圧手段５０に
代えて、供給源３１からギヤ洗浄系４０を形成する配管
４５，４７を通して洗浄液が注入され、ギヤ側面２３
Ｓ，２６Ｓを洗浄する。この際、ギヤポンプ２０の吐出
圧Ｐｂは、図６に示す如く低下しているので、逆流は生
じない。However, the discharge pressure Pb of the gear pump 20 becomes
As shown in FIG. 6, until the pressure drops to the normal pressure P,
There is no need to continue the pressure increase operation. Therefore, in this embodiment, at time t2 after time tp in FIG. 3 at which the discharge pressure Pb reaches the peak pressure Pp, the control panel 70 closes the pressurized supply valve 61 and the pressure-increase injection valve 62. However, during the cleaning of the paint supply system (11, 13, 20, 14), it is desirable to continue cleaning the gear side surfaces 23S, 26S. Therefore, the control panel 70 opens the cleaning valve 46 at the same time as closing the pressurizing supply valve 61 and the pressure increasing injection valve 62 (time t2). Then, instead of the cleaning liquid pressure increasing means 50, the cleaning liquid is injected into the injection channel 41 from the supply source 31 through the pipes 45 and 47 forming the gear cleaning system 40, and the gear side surface 23.
Wash S and 26S. At this time, since the discharge pressure Pb of the gear pump 20 is reduced as shown in FIG. 6, no backflow occurs.
【００２９】ここに、時刻ｔ３になると、制御盤７０
は、洗浄弁４６と洗浄液チェンジバルブＣＶｗとを閉鎖
し、塗料供給系（１１，１３，２０，１４）の洗浄とギ
ヤ側面２３Ｓ，２６Ｓの洗浄とを終了させる。引続き、
直ちにＹ色チェンジバルブＣＶｙを開放するとともにギ
ヤポンプ２０（駆動モータ２２Ｍ）を通常の回転速度Ｎ
Ｓに切替える。したがって、洗浄終了とともに色替え後
のＹ色塗料を、塗料配管１３，ギヤポンプ２０，塗料配
管１４を通して、供給先つまりスプレーガン１００へ供
給することができる。At time t3, the control panel 70
Closes the cleaning valve 46 and the cleaning liquid change valve CVw to terminate the cleaning of the paint supply system (11, 13, 20, 14) and the cleaning of the gear side surfaces 23S, 26S. Continued,
Immediately open the Y color change valve CVy and set the gear pump 20 (drive motor 22M) to the normal rotation speed N.
Switch to S. Therefore, the Y color paint after the color change upon completion of the washing can be supplied to the supply destination, that is, the spray gun 100, through the paint pipe 13, the gear pump 20, and the paint pipe 14.
【００３０】しかして、この実施例によれば、洗浄液増
圧手段５０と駆動制御手段（６０，７０）とを設け、ギ
ヤポンプ２０を高速回転ＨＳさせて塗料供給系（１１，
１３，２０，１４）を洗浄すると同時にギヤポンプ２０
の吐出圧Ｐｂによる逆流を防止してギヤ側面２３Ｓ，２
６Ｓを洗浄することができる構成とされているので、吐
出圧Ｐｂの上昇による注入流路４１や配管４５内を汚し
たりギヤ側面２３Ｓ，２６Ｓの実質的洗浄までの時間遅
れを生じさせることなく、前使用の塗料を完全排除しつ
つ塗料供給系（１１，１３，２０，１４）とギヤ側面２
３Ｓ，２６Ｓとの双方を迅速に洗浄できる。Thus, according to this embodiment, the cleaning liquid pressure increasing means 50 and the drive control means (60, 70) are provided, and the gear pump 20 is rotated at a high speed HS so that the paint supply system (11,
13, 20, 14), and at the same time
Of the gear side surface 23S, 2
6S is configured to be able to be cleaned, so that the rise of the discharge pressure Pb does not cause contamination of the injection flow path 41 or the pipe 45 or a time delay until the gear side surfaces 23S and 26S are substantially cleaned. Paint supply system (11,13,20,14) and gear side 2 while completely eliminating paint used before
Both 3S and 26S can be quickly cleaned.
【００３１】また、洗浄液増圧手段５０は、大径シリン
ダ装置５１と小径シリンダ装置５５とをピストンロッド
５９で連結した構成であるから、構造簡単で低コストで
ある。しかも、増圧液注入量は、駆動軸２２，従動軸２
５内に設けられた細径の分岐細孔４１ａ，４３ａを通し
てギヤポンプ２０の吐出圧Ｐｂに打勝つだけの小量でよ
いから、洗浄液増圧手段５０を非常に小型化できる。こ
のことから、供給源３１とは別の高圧液供給源と配管系
を設ける必要がないわけである。Since the cleaning liquid pressure increasing means 50 has a structure in which the large-diameter cylinder device 51 and the small-diameter cylinder device 55 are connected by the piston rod 59, the structure is simple and the cost is low. In addition, the injection amount of the pressurized liquid is controlled by the drive shaft 22, the driven shaft 2
The cleaning liquid pressure increasing means 50 can be made very small because it is sufficient to overcome the discharge pressure Pb of the gear pump 20 through the small-diameter branch fine holes 41a and 43a provided in the inside 5. From this, it is not necessary to provide a high-pressure liquid supply source and a piping system different from the supply source 31.
【００３２】また、洗浄液増圧手段５０は、その構造
上、増圧率Ａ１／Ａ２を比較的簡単に大きくすることが
できるから、ギヤポンプ２０の洗浄中の回転速度（Ｈ
Ｓ）を一段と高速化でき、この点からも塗料供給系（１
１，１３，２０，１４）の洗浄時間を一層短縮できる。Since the cleaning liquid pressure increasing means 50 can increase the pressure increasing rate A1 / A2 relatively easily due to its structure, the rotation speed (H) of the gear pump 20 during cleaning is high.
S) can be further accelerated, and from this point, the paint supply system (1)
1,13,20,14) can further reduce the cleaning time.
【００３３】また、駆動制御手段を形成する弁切替構造
６０には、洗浄液供給源３１と小径シリンダ装置５５の
増圧室５８とを結ぶ配管４５，４７と充填弁６３とが設
けられているので、塗料供給中に洗浄液増圧手段５０の
起動準備を確立させられる。よって、この点からも洗浄
時間の短縮が図れる。Further, the valve switching structure 60 forming the drive control means is provided with the pipes 45 and 47 connecting the cleaning liquid supply source 31 and the pressure increasing chamber 58 of the small diameter cylinder device 55 and the filling valve 63. Thus, the preparation for starting the cleaning liquid pressure increasing means 50 can be established during the supply of the paint. Therefore, the cleaning time can be reduced from this point as well.
【００３４】また、制御盤７０は、ギヤポンプ２０の吐
出圧Ｐｂが通常的圧力Ｐに低下したときには、加圧供給
弁６１，増圧注入弁６２を閉鎖して洗浄液増圧手段５０
の増圧動作を停止し、洗浄弁４６を開放してギヤ側面２
３Ｓ，２６Ｓの洗浄を続行するように形成されているの
で、塗料供給系（１１，１３，２０）の洗浄後の汚れた
液のギヤポンプ２０側から配管４５側への逆流およびギ
ヤ側面２３Ｓ，２６Ｓの洗浄後の汚れた液の上流側塗料
配管１３側への逆流をも同時に防止できる。When the discharge pressure Pb of the gear pump 20 decreases to the normal pressure P, the control panel 70 closes the pressurizing supply valve 61 and the pressure increasing injection valve 62 to increase the cleaning liquid pressure increasing means 50.
Is stopped, the cleaning valve 46 is opened, and the gear side surface 2 is released.
3S and 26S are formed so as to continue the cleaning, so that the dirty liquid after the cleaning of the paint supply system (11, 13, 20) flows back from the gear pump 20 side to the pipe 45 side and the gear side surfaces 23S, 26S. The backflow of the dirty liquid after the cleaning to the upstream paint pipe 13 side can be prevented at the same time.
【００３５】さらには、制御盤７０は、ギヤ側面２３
Ｓ，２６Ｓの洗浄系（４５，４６，４７）および洗浄液
増圧手段５０の駆動用弁切替構造６０のみならず、色替
え装置１０、ギヤポンプ２０（２２Ｍ）、塗料供給系
（１１，１３，２０，１４）の洗浄系（３４，３３）を
総合的連関をもって駆動制御する構成とされているの
で、洗浄工程を含む塗料色切替時間を大幅に短縮でき
る。Further, the control panel 70 is mounted on the gear side surface 23.
S, 26S not only the cleaning system (45, 46, 47) and the valve switching structure 60 for driving the cleaning liquid pressure increasing means 50, but also the color changing device 10, the gear pump 20 (22M), and the paint supply system (11, 13, 20). , 14), the drive system of the cleaning system (34, 33) is controlled in a comprehensive manner, so that the paint color switching time including the cleaning step can be greatly reduced.
【００３６】[0036]
【発明の効果】以上の通り、色替え装置，塗料配管，塗
料用ギヤポンプを含みギヤポンプを高速回転させつつ塗
料供給系の洗浄を行うことが可能に形成された塗料供給
装置において、ギヤポンプの駆動軸内に注入する洗浄液
を増圧するための洗浄液増圧手段とこの洗浄液増圧手段
を洗浄開始時からその吐出圧がピーク圧力に到達する迄
の間に増圧起動開始させる駆動制御手段とを設けた構成
であるから、ギヤポンプの吐出圧上昇に伴うギヤ側面洗
浄系への汚れた洗浄液の逆流とそれによるギヤ側面の実
質的洗浄の時間遅れを一掃できる。もって、塗料供給系
とギヤ側面との洗浄を同時的かつ迅速に行う洗浄時間短
縮を図るとともに前に使用した塗料の残存を完全排斥で
きる。As described above, in the paint supply device including the color changing device, the paint pipe, and the paint gear pump, which is capable of cleaning the paint supply system while rotating the gear pump at high speed, the drive shaft of the gear pump is provided. Cleaning liquid pressure increasing means for increasing the pressure of the cleaning liquid to be injected into the inside, and drive control means for starting the pressure increase of the cleaning liquid pressure increasing means from the start of cleaning until the discharge pressure reaches the peak pressure. With this configuration, it is possible to eliminate the backflow of the dirty cleaning liquid into the gear side cleaning system due to the increase in the discharge pressure of the gear pump and the time delay of the substantial cleaning of the gear side surface due to the backflow. Thus, it is possible to shorten the cleaning time for simultaneously and promptly cleaning the paint supply system and the gear side surface, and completely eliminate the residual paint used before.
【図１】本発明の実施例を示す全体構成図である。FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.
【図２】同じく、主に制御盤を説明するためのブロック
図である。FIG. 2 is a block diagram for mainly explaining a control panel.
【図３】同じく、動作を説明するためのタイミングチャ
ートである。FIG. 3 is a timing chart for explaining the operation.
【図４】従来の塗料供給装置の全体構成図である。FIG. 4 is an overall configuration diagram of a conventional paint supply device.
【図５】本発明および従来例の塗料用ギヤポンプの縦断
面図である。FIG. 5 is a longitudinal sectional view of a gear pump for paint of the present invention and a conventional example.
【図６】ギヤポンプの動作と吐出圧の関係を説明するた
めの図である。FIG. 6 is a diagram for explaining the relationship between the operation of the gear pump and the discharge pressure.
１０ 色替え装置 １１ マニホールド（塗料供給系） １２ 圧搾空気源 １３ 塗料配管（塗料供給系） １４ 塗料配管（塗料供給系） ２０ 塗料用ギヤポンプ（塗料供給系） ２１ ケーシング ２２ 駆動軸 ２３ 駆動ギヤ ２３Ｓ ギヤ側面 ２５ 従動軸 ２６ 従動ギヤ ２６Ｓ ギヤ側面 ２８ 吐出部 ３０ 塗料供給系の洗浄系 ３１ 洗浄液供給源（液供給源） ３２ 配管 ３３ バイパス弁 ３４ バイパス配管 ４０ ギヤ洗浄系 ４１ 注入流路（駆動軸内） ４１ａ 分岐細孔 ４２ 連通流路 ４３ 戻り流路 ４３ａ 分岐細孔 ４５ 配管 ４６ 洗浄弁 ４７ 配管 ４９ 配管 ５０ 洗浄液増圧手段 ５１ 大径シリンダ装置 ５２ シリンダ ５３ ピストン ５４ 加圧室 ５５ 小径シリンダ装置 ５６ シリンダ ５７ ピストン ５８ 増圧室 ５９ ピストンロッド ６０ 弁切替構造（駆動制御手段） ６１ 加圧供給弁 ６２ 増圧注入弁 ６３ 充填弁 ６４ 配管 ７０ 制御盤（駆動制御手段） ８０ プログラム設定器 １００ 供給先（スプレーガン） REFERENCE SIGNS LIST 10 color changing device 11 manifold (paint supply system) 12 compressed air source 13 paint pipe (paint supply system) 14 paint pipe (paint supply system) 20 paint gear pump (paint supply system) 21 casing 22 drive shaft 23 drive gear 23S gear Side surface 25 driven shaft 26 driven gear 26S gear side surface 28 discharge unit 30 paint supply system cleaning system 31 cleaning liquid supply source (liquid supply source) 32 piping 33 bypass valve 34 bypass piping 40 gear cleaning system 41 injection flow path (in the drive shaft) 41a Branch fine hole 42 Communication flow path 43 Return flow path 43a Branch fine hole 45 Piping 46 Washing valve 47 Piping 49 Piping 50 Cleaning liquid pressure increasing means 51 Large diameter cylinder device 52 Cylinder 53 Piston 54 Pressurizing chamber 55 Small diameter cylinder device 56 Cylinder 57 Piston 58 Booster chamber 59 Piston rod 60 Valve switching structure (drive Dynamic control means) 61 pressurized supply valve 62 pressure increasing injection valve 63 filling valve 64 piping 70 control panel (drive control means) 80 program setting device 100 supply destination (spray gun)
Claims (1)
ンプとを含み構成され、色替え間に高速回転させたギヤ
ポンプに色替え装置側から塗料洗浄液を供給して塗料供
給系を洗浄可能、かつ駆動軸内を通して塗料洗浄液を注
入しつつギヤポンプ内のギヤ側面を洗浄可能に形成され
た塗料供給装置において、前記駆動軸と塗料洗浄液の供
給源との間に洗浄液増圧手段を配設し、かつ洗浄開始時
からギヤポンプの吐出圧がピーク圧力に到達する迄の間
に洗浄液増圧手段を増圧起動開始させる駆動制御手段を
設けたことを特徴とする塗料供給装置。1. A color change device, a paint pipe, and a gear pump for paint are configured, and a paint cleaning liquid can be supplied from the color change device side to the gear pump rotated at a high speed during the color change so that the paint supply system can be washed. And in a paint supply device formed so as to be able to wash the gear side surface in the gear pump while injecting the paint washing liquid through the inside of the drive shaft, disposing a washing liquid pressure increasing means between the drive shaft and a supply source of the paint washing liquid, And a drive control means for starting the pressure increase of the cleaning liquid pressure increasing means from the start of cleaning until the discharge pressure of the gear pump reaches the peak pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9654091A JP2728798B2 (en) | 1991-04-26 | 1991-04-26 | Paint supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9654091A JP2728798B2 (en) | 1991-04-26 | 1991-04-26 | Paint supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04326958A JPH04326958A (en) | 1992-11-16 |
| JP2728798B2 true JP2728798B2 (en) | 1998-03-18 |
Family
ID=14167943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9654091A Expired - Lifetime JP2728798B2 (en) | 1991-04-26 | 1991-04-26 | Paint supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2728798B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1119553A (en) * | 1997-07-01 | 1999-01-26 | Honda Motor Co Ltd | Multicolor coating device |
| JP2002102757A (en) * | 2000-09-28 | 2002-04-09 | Dyflex Corp | Spray gun |
-
1991
- 1991-04-26 JP JP9654091A patent/JP2728798B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04326958A (en) | 1992-11-16 |
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