Supply equipment and coating system

Abstract

To provide a pump which can discharge two fluids with different ratios, and a coating system using the pump.SOLUTION: A supply device 300 mainly includes a first pump 311, a second pump 312, a hydraulic pump 313, a first pressure-reducing valve 314, a second pressure-reducing valve 315, an oil tank 316, and a radiator 317. The second pressure-reducing valve 315 adjusts a pressure of oil discharged by the first pressure-reducing valve 314 to a pressure adaptable to the second pump 312 and sends the oil to the second pump 312. The second pressure-reducing valve 315 can adjust the pressure of the oil sent to the second pump 312, thereby adjusts a speed of a piston provided on the second pump 312 and adjusts a discharge amount of the second pump 312. Generally, a mixing ratio of an urethane waterproof agent and a curing accelerator is determined by a manufacturer, and the amount of the curing accelerator is smaller. Thus, the second pressure-reducing valve 315 adjusts the pressure of the oil sent to the second pump 312, and thereby adjusts the amount of the curing accelerator discharged by the second pump 312 to a value determined by the manufacturer.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a supply device that discharges a viscous fluid and a coating system that uses the supply device. [Background technology]

[0002] For example, a pressure-feeding device that delivers two-component paint to the roof of a building is known. The pressure-feeding device includes a base agent tank, a hardener tank, an air pressure pump, and an air pressure drive source that provides the driving power for the pump. The air pressure pump is a fixed-displacement type and consists of an air pressure motor connected to the air pressure drive source and two plunger pumps connected to the bottom of the motor. The two plunger pumps are driven by the air pressure motor and discharge the base agent and hardener at a volume ratio of 1:1 (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 8-120851 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, some two-component paints require the base and hardener to be mixed at a volume ratio other than 1:1. If the pump discharges such two-component paints at a 1:1 ratio, the two-component paint may not cure properly.

[0005] The present invention has been made in view of the above-mentioned problems, and has an object to provide a supply device capable of discharging two fluids at different ratios, and a coating system using the supply device. [Means for solving the problem]

[0006] The supply device according to the first invention of the present application is characterized by comprising one fluid source, a first pump driven by fluid from the fluid source, a second pump driven by fluid from the fluid source and having a discharge volume different from that of the first pump, and an adjustment unit provided between the fluid source and the second pump for adjusting the flow rate of fluid from the fluid source to the second pump.

[0007] It is preferable that the device further comprises an adjustment flow path for flowing the fluid from the adjustment portion to the fluid source.

[0008] The discharge rate of the second pump is preferably less than the discharge rate of the first pump.

[0009] It is preferable that the device further comprises an adjustment flow path for causing the fluid to flow from the adjustment portion to the fluid source, and that the adjustment flow path comprises a fluid reservoir portion for storing the fluid.

[0010] It is preferable that the apparatus further comprises a cooling section for cooling the fluid and a fluid storage section for storing the fluid, the fluid source feeding the fluid to the cooling section, and the fluid passing through the cooling section flowing into the fluid storage section.

[0011] It is preferable that the fluid supply system further comprises a first return path for allowing the fluid to flow from the first pump to the fluid source, and a second return path for allowing the fluid to flow from the second pump to the fluid source.

[0012] Preferably, the second pump comprises a piston driven by fluid from the regulator, the speed of the piston being regulated by the fluid from the regulator.

[0013] The coating system according to the second invention of the present application comprises an application device having the supply device, a cage portion extending in a predetermined direction, a plurality of discharge portions attached to the cage portion, and an agitation portion that supplies liquid to the plurality of discharge portions, wherein the plurality of discharge portions are attached in a line in the predetermined direction, and the first pump supplies a first material to the agitation portion, and the second pump supplies a second material to the agitation portion. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a supply device capable of discharging two fluids at different ratios, and a coating system using the supply device. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a block diagram that schematically illustrates a painting system according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram illustrating a supply device. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 10 is a plan view of a supply unit included in a coating device according to a second embodiment of the present invention. [Figure 8] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, a coating system 10 having a coating device 100 according to a first embodiment of the present invention will be described with reference to FIG.

[0017] The painting system 10 mainly comprises an application device 100, a supply device 300, a first tank 13, a second tank 14, and a compressed air source 15, and is used to mix a one-component urethane waterproofing agent (first material) with a curing accelerator (second material) and apply the mixture.

[0018] The first tank 13 is connected to the supply device 300 via piping, and the supply device 300 is connected to the application device 100 via a first connecting hose 16. The first tank 13 contains a urethane waterproofing agent. When the supply device 300 operates, the waterproofing agent in the first tank 13 is sucked into the supply device 300 from the first tank 13, and then pressure-transported via the first connecting hose 16 to the application device 100 installed on the roof of the building 20.

[0019] The second tank 14 is connected to the supply device 300 via piping, and the supply device 300 is connected to the application device 100 via a second connecting hose 17. The second tank 14 contains a curing accelerator. When the supply device 300 operates, the curing accelerator in the second tank 14 is sucked from the second tank 14 into the supply device 300 and then pressure-fed to the application device 100 via the second connecting hose 17. As will be described later, the urethane waterproofing agent and the curing accelerator are each pressure-fed from the first and second tanks 13 and 14 to the application device 100 via separate paths without being mixed with each other.

[0020] The compressed air source 15 is an air compressor and / or an air tank, and is connected to the coating device 100 via a third connecting hose 18. The compressed air discharged from the compressed air source 15 is sent to the coating device 100 by the third connecting hose 18.

[0021] Next, the supply device 300 will be described with reference to Fig. 2. The supply device 300 mainly includes a first pump 311, a second pump 312, a hydraulic pump 313, a first pressure reducing valve 314, a second pressure reducing valve 315, an oil tank 316, a radiator 317, a first valve 318, a second valve 319, and first to eighth pipelines 321-328.

[0022] The hydraulic pump 313 constitutes a fluid source and is connected to the first pressure reducing valve 314 and the oil tank 316. The first pressure reducing valve 314 adjusts the pressure of the oil discharged from the hydraulic pump 313 to a predetermined level and sends it to the first pump 311 and the second pump 312, while sending any remaining oil to the radiator 317 via a seventh pipe 327. The first pressure reducing valve 314 and the first pump 311 are connected by a first valve 318 and a first pipe 321. The first valve 318 is a two-way valve that is opened and closed as appropriate. The first pressure reducing valve 314 and the second pump 312 are connected by a second valve 319, a second pressure reducing valve 315, and a third pipe 323. The second valve 319 is a two-way valve that is opened and closed as appropriate. The second pressure reducing valve 315 constitutes an adjustment unit, adjusts the pressure of the oil discharged by the first pressure reducing valve 314 to a pressure suitable for the second pump 312, and sends it to the second pump 312, while sending any remaining oil to the oil tank 316 via a fifth pipe 325. The fifth pipe 325, the oil tank 316, and the sixth pipe 326 constitute an adjustment flow path.

[0023] The first pump 311 is a single-piston pump with a discharge volume suitable for discharging a urethane waterproofing agent. It is equipped with two fluid inlets 311a and 311b, one fluid outlet 311c, an intake port 311d, and an outlet 311e. The fluids flowing into the first pump 311 from the two fluid inlets 311a and 311b alternately press against pistons (not shown) of the first pump 311, causing them to reciprocate. This causes the pistons to be driven by fluid from the hydraulic pump 313, thereby driving the first pump 311. The oil that pressed against the pistons is sequentially discharged from the fluid outlet 311c and sent to the oil tank 316 via the second pipeline 322. The reciprocating pistons draw in the urethane waterproofing agent from the first tank 13 through the intake port 311d and discharge it from the outlet 311e to the first connecting hose 16. The second conduit 322 forms a first return path.

[0024] The second pump 312 is a single-piston pump with a discharge volume suitable for discharging the hardening accelerator, and is equipped with two fluid inlets 312a and 312b, one fluid outlet 312c, an intake port 312d, and an outlet 312e. Oil flowing into the second pump 312 from the two fluid inlets 312a and 312b alternately presses a piston (not shown) of the second pump 312, causing it to reciprocate. This causes the piston to be driven by fluid from the hydraulic pump 313, thereby driving the second pump 312. The oil that pressed the piston is sequentially discharged from the fluid outlet 312c and sent to the oil tank 316 via the fourth pipe 324. The reciprocating piston draws in the hardening accelerator from the second tank 14 through the intake port 312d and discharges it from the outlet 312e to the second connecting hose 17. The discharge rate of the second pump 312 is smaller than the discharge rate of the first pump 311. The fourth pipe 324 forms a second return path.

[0025] The radiator 317 serves as a cooling unit that cools the oil, cools the oil received from the first pressure reducing valve 314, and sends the oil to the oil tank 316 via an eighth pipe 328. The oil tank 316 serves as a fluid storage unit that receives and stores the oil from the second pressure reducing valve 315, the first pump 311, the second pump 312, and the radiator 317. The stored oil is sucked into the hydraulic pump 313 via a sixth pipe 326.

[0026] The second pressure reducing valve 315 can adjust the pressure of the oil sent to the second pump 312, thereby adjusting the speed of the piston in the second pump 312 and adjusting the discharge rate of the second pump 312. Generally, the mixing ratio of the urethane waterproofing agent and the curing accelerator is determined by the manufacturer, with the curing accelerator being in a smaller amount. Therefore, by adjusting the pressure of the oil sent to the second pump 312 using the second pressure reducing valve 315, the amount of curing accelerator discharged by the second pump 312 is adjusted to the value determined by the manufacturer. This results in a supply device that can discharge two fluids at different ratios.

[0027] Next, the coating device 100 will be described with reference to Figures 3 to 5. The coating device 100 mainly includes a cage unit 110, a gripping unit 120, a plurality of discharge units 130a to 130d, an agitating unit 140, and an air motor 150.

[0028] The cage section 110 mainly includes a blade 111, a cage body 112, a cage connection section 113, and a pipe holding section 114. The cage body 112 is an angle steel with an L-shaped cross section formed by joining two flat plates at a right angle, and extends a predetermined length in a predetermined direction. Hereinafter, the direction in which the cage body 112 extends is referred to as the longitudinal direction. One of the first flat plates 112a is trapezoidal in plan view, and the other, the second flat plate 112b, is rectangular. The blade 111 has the shape of a metal flat plate with the same longitudinal length as the cage body 112, and one side extending in the longitudinal direction has a sawtooth shape in plan view. The blade 111 is attached to the second flat plate 112b via four bolts and nuts 115, and the sawtooth-shaped side protrudes from the cage body 112. The cage connection part 113 is a flat plate that protrudes perpendicularly from the center of the first flat plate 112a in the longitudinal direction. The piping holding part 114 is a flat plate that protrudes parallel to the center of the first flat plate 112a in the longitudinal direction and in the opposite direction to the second flat plate 112b. The cage connection part 113 and the piping holding part 114 are fixed to the first flat plate 112a via bolts and nuts 116.

[0029] The gripping portion 120 is a cylindrical metal tube with a slit 121 at its tip. The cage connecting portion 113 is inserted into the slit 121, and the two are fixed together with bolts and nuts 122. Braces 123 are provided from both longitudinal ends of the first flat plate 112a to the gripping portion 120. This firmly fixes the cage portion 110 and the gripping portion 120 together.

[0030] The multiple discharge sections 130a-130d include two inner discharge sections 130b, 130c and two outer discharge sections 130a, 130d, each made of a metallic cylindrical pipe. These are aligned in the longitudinal direction of the cage body 112 and attached to the cage body 112. More specifically, a pipe 161 connected to the stirring section 140 (described later) is fixed in a through-hole opening in the pipe holder 114, and a horizontal pipe 162 is connected to the end of the pipe 161 passing through the through-hole. The horizontal pipe 162 is a cylindrical pipe extending in the longitudinal direction on the bottom side of the cage section 110. The inner discharge sections 130b, 130c are attached just before both ends of the horizontal pipe 162, and the outer discharge sections 130a, 130d are attached to both ends of the horizontal pipe 162. The inner diameters of the inner discharge sections 130b, 130c are smaller than the inner diameters of the outer discharge sections 130a, 130d. If the inner diameters of the inner discharge portions 130b and 130c were larger than the inner diameters of the outer discharge portions 130a and 130d, most of the paint flowing through the lateral pipe 162 would be discharged from the inner discharge portions 130b and 130c, and less paint would be transported to the outer discharge portions 130a and 130d. This could result in insufficient paint being discharged from the outer discharge portions 130a and 130d and the paint not being discharged evenly over the entire longitudinal length of the blade 111. However, according to this embodiment, the inner diameters of the inner discharge portions 130b and 130c are smaller than the inner diameters of the outer discharge portions 130a and 130d, so the amount of paint discharged from the inner discharge portions 130b and 130c is reduced and the paint is transported enough to the outer discharge portions 130a and 130d, so the paint is discharged evenly over the entire longitudinal length of the blade 111.

[0031] 4, the inner discharge portions 130b and 130c are disposed equidistant from the longitudinal center of the cage body 112, and the outer discharge portions 130a and 130d are disposed longitudinally outward of the inner discharge portions 130b and 130c and equidistant from the longitudinal center of the cage body 112. In other words, the distance from the longitudinal center of the cage body 112 to the two inner discharge portions 130b and 130c is shorter than the distance from the longitudinal center of the cage body 112 to the two outer discharge portions 130a and 130d. Furthermore, the distance from the longitudinal center of the cage body 112 to the inner discharge portion 130b is longer than the distance between the inner discharge portion 130b and the outer discharge portion 130a. The same applies to the inner discharge portion 130c and the outer discharge portion 130d. The two outer discharge portions 130a, 130d are disposed inside both longitudinal ends of the blade 111. If the paint discharged from the discharge portions 130a to 130d flows outside the longitudinal ends of the blade 111, the blade 111 will not be able to evenly level the paint, which could result in unevenness. However, according to this embodiment, the two outer discharge portions 130a, 130d are disposed inside both longitudinal ends of the blade 111, so the paint discharged from the outer discharge portions 130a, 130d will not flow outside the longitudinal ends of the blade 111, and all of the paint discharged by the blade 111 can be evenly leveled.

[0032] 5, the multiple discharge portions 130a to 130d are installed so that their central axes are perpendicular to the longitudinal direction of the cage body 112 and parallel to the plane of the blade 111 that faces the discharge portions 130a to 130d. If the paint discharged from the discharge portions 130a to 130d comes into contact with the blade 111 before directly contacting the surface to be coated, bubbles may form when the paint comes into contact with the blade 111. However, according to this embodiment, the paint discharged from the discharge portions 130a to 130d comes into direct contact with the surface to be coated without coming into contact with the blade 111, so no bubbles form in the paint.

[0033] The air motor 150 is connected to the compressed air source 15 via the third connecting hose 18, and generates a rotational force using compressed air supplied from the compressed air source 15. One end of the air motor 150 is connected to the agitating unit 140, and the rotational force generated by the air motor 150 is transmitted to the agitating unit 140. The air motor 150 is fixed to the gripping unit 120 by a plurality of mounting bands 163.

[0034] The agitator 140 is driven by an air motor 150 and has the function of agitating and mixing the waterproofing agent and the hardening accelerator, as will be described in detail later.

[0035] The gripping part 120 is provided with a supply part 170. The supply part 170 mainly includes a waterproofing agent valve 171, an accelerator valve 172, and an air valve 173.

[0036] The first connecting hose 16 is connected to the inlet 171a of the waterproofing agent valve 171, and the first mixing pipe 174a is connected to the outlet 171b. As a result, the waterproofing agent in the first tank 13 is sent to the waterproofing agent valve 171 via the first pump 311, and when the waterproofing agent valve 171 is opened, the waterproofing agent is sent to the first mixing pipe 174a.

[0037] The second connecting hose 17 is connected to the inlet 172a of the accelerator valve 172, and the second mixing pipe 174b is connected to the outlet 172b. This allows the hardening accelerator in the second tank 14 to be sent to the accelerator valve 172 via the second pump 312. When the accelerator valve 172 is opened, the hardening accelerator is sent to the second mixing pipe 174b.

[0038] The first mixing pipe 174a and the second mixing pipe 174b are joined to a third mixing pipe 174c, which is connected to the agitating section 140. As a result, the waterproofing agent sent from the waterproofing agent valve 171 and the hardening accelerator sent from the accelerator valve 172 are both sent to the agitating section 140 via the third mixing pipe 174c. Because the waterproofing agent and the hardening accelerator are pressurized by the first pump 311 and the second pump 312, the supplying section 170 can supply the pressurized liquid to the agitating section 140 simply by opening the valve.

[0039] The third connecting hose 18 is connected to the inlet 173a of the air valve 173, and the compressed air pipe 174d is connected to the outlet 173b. As a result, compressed air from the compressed air source 15 is sent to the air valve 173, and when the air valve 173 is opened, the compressed air is sent to the air motor 150.

[0040] Next, the stirring unit 140 will be described in detail with reference to Fig. 6. The stirring unit 140 mainly includes an elbow 141, a lid 142, an O-ring 143, a nut 144a, a first screw 145, a joint bolt 144b, a second screw 146, a bolt 144c, a casing 147, and an adapter 148.

[0041] The elbow 141 mainly comprises a main pipe portion 141a with an internal thread and a secondary pipe portion 141b with an external thread. The secondary pipe portion 141b is connected to the main pipe portion 141a so as to be perpendicular to the main pipe portion 141a and so that the interiors of the two pipes penetrate each other.

[0042] The lid portion 142 mainly comprises a plate-shaped portion 142b having multiple opposing flat side portions 142a, a first connecting portion 142c protruding from the center of the top surface of the plate-shaped portion 142b, and a second connecting portion 142d protruding from near the outer periphery of the bottom surface of the plate-shaped portion 142b. The outer peripheral surface of the first connecting portion 142c is externally threaded and threadably engages with the main pipe portion 141a of the elbow 141. The outer peripheral surface of the second connecting portion 142d is externally threaded from a position a predetermined distance axially from the bottom surface of the plate-shaped portion 142b to the protruding end of the second connecting portion 142d. The O-ring is made of elastic resin and is fitted onto the outer peripheral surface of the second connecting portion 142d near the bottom surface of the plate-shaped portion 142b.

[0043] The first screw 145 has three blades 145a to 145c and a central hole 145d. The tips of the blades protrude in the circumferential direction of the rotation circle and are bent so as to protrude toward the second screw 146. The second screw 146 has three blades 146a to 146c and a central hole 146d. The tips of the blades protrude in the circumferential direction of the rotation circle and are bent so as to protrude toward the first screw 145.

[0044] The casing 147 has a cylindrical shape with a bottom, and has an internal thread 147a cut on the inner circumference of the cylinder near the open end, and a through-hole with an internal thread cut in the bottom. The second connecting portion 142d of the lid portion 142 can be screwed onto the internal thread 147a on the inner circumference of the cylinder. The adapter 148 has an external thread on one end and an internal thread on the other end. The external thread screws into the through-hole at the bottom of the casing 147. A pipe 161 is connected to the internal thread.

[0045] An air motor 150 is connected to the main pipe portion 141a of the elbow 141, and a rotation shaft (not shown) of the air motor 150 passes through the inside of the main pipe portion 141a. The rotation shaft is inserted into and threadedly engaged with the nut 144a, the center hole 145d of the first screw 145, and the joint bolt 144b. The bolt 144c is inserted into and threadedly engaged with the center hole 146d of the second screw 146 and the joint bolt 144b. As a result, the first screw 145 and the second screw 146 are connected to the air motor 150 and rotate.

[0046] Three blades 145a to 145c of the first screw 145 protrude toward the second screw 146, and the first screw 145 rotates so as to push out liquid toward the second screw 146. Furthermore, three blades 146a to 146c of the second screw 146 protrude toward the first screw 145, and the second screw 146 rotates so as to push out liquid toward the first screw 145. In other words, the fluid extrusion direction of the first screw 145 is opposite to the fluid extrusion direction of the second screw 146.

[0047] After the joined nut 144a, first screw 145, joint bolt 144b, second screw 146, and bolt 144c are stored inside casing 147, second connecting portion 142d is screwed into female thread 147a. In this manner, stirring portion 140 is assembled.

[0048] Next, a description will be given of the operation of the painting system 10. It is assumed that the waterproofing agent valve 171, the accelerator valve 172, and the air valve 173 are closed in advance.

[0049] First, the waterproofing agent is prepared in the first tank 13, and the curing accelerator is prepared in the second tank 14. Then, the first pump 311, the second pump 312, and the compressed air source 15 are operated to pump the waterproofing agent, the curing accelerator, and the compressed air to the coating device 100.

[0050] Next, the air valve 173 is opened, causing the air motor 150 to start rotating. Then, the waterproofing agent valve 171 and the accelerator valve 172 are opened, causing the pressurized waterproofing agent and accelerator to enter the third mixing pipe 174c. In this state, the waterproofing agent and accelerator are not sufficiently mixed to demonstrate their performance.

[0051] Next, the waterproofing agent and the hardening accelerator that have entered the agitation unit 140 via the third mixing pipe 174c are thoroughly mixed by the first screw 145 and the second screw 146. More specifically, the three blades 145a to 145c of the first screw 145 extrude the waterproofing agent and the hardening accelerator toward the second screw 146 while stirring them, and the three blades 146a to 146c of the second screw 146 extrude the waterproofing agent and the hardening accelerator toward the first screw 145 while stirring them. The waterproofing agent and the hardening accelerator are thoroughly mixed together by the action of these two blades and the pressure from the first pump 311 and the second pump 312, and then extruded from the agitation unit 140 into the piping 161.

[0052] The mixed paint of the waterproofing agent and the curing accelerator extruded into the pipe 161 reaches the horizontal pipe 162. The mixed paint that reaches the horizontal pipe 162 is discharged from the inner discharge portions 130b and 130c and also from the outer discharge portions 130a and 130d. As described above, because the inner diameters of the inner discharge portions 130b and 130c are smaller than the inner diameters of the outer discharge portions 130a and 130d, the amount of paint discharged from the inner discharge portions 130b and 130c is reduced and sufficient paint is transported to the outer discharge portions 130a and 130d. As a result, appropriate amounts of paint are discharged from the inner discharge portions 130b and 130c and the outer discharge portions 130a and 130d, respectively, and the paint is discharged evenly along the entire longitudinal length of the blade 111. Furthermore, as described above, the direction in which the multiple discharge portions 130a to 130d discharge paint is parallel to the plane of the blade 111 that faces the discharge portions 130a to 130d. As a result, the paint discharged from the discharge portions 130a to 130d comes into direct contact with the coating surface without coming into contact with the blade 111, and therefore no bubbles are generated in the paint.

[0053] Then, while discharging paint, the worker moves the coating device 100 back and forth and / or left and right to evenly spread the paint dispensed onto the target surface. At this time, because the two outer discharge portions 130a, 130d are installed inside both longitudinal ends of the blade 111, the paint dispensed from the outer discharge portions 130a, 130d does not flow outside the longitudinal ends of the blade 111. This allows the worker to easily evenly spread the paint using the blade 111 while discharging the paint. In other words, one person can hold the discharge portions 130a to 130d and level the paint.

[0054] According to this embodiment, a supply device capable of discharging two fluids at different ratios and a coating system using the supply device are obtained. Also, coating of paint can be easily performed with a small number of workers.

[0055] Next, a coating apparatus according to a second embodiment of the present invention will be described with reference to Figures 7 and 8. The coating apparatus according to the second embodiment differs from the coating apparatus 100 according to the first embodiment in the configuration of the supply unit 270. Hereinafter, the same components as those in the coating apparatus 100 according to the first embodiment will be denoted by the same reference numerals and their description will be omitted, and the supply unit 270 will be described.

[0056] Supply unit 270 is provided on grip unit 120. Supply unit 270 mainly includes waterproofing agent valve 271, accelerator valve 272, cross joint (junction) 273, and lever (operation unit) 274. Waterproofing agent valve (first valve) 271 and accelerator valve (second valve) 272 are so-called ball valves, and are connected to one lever 274. By moving lever 274, waterproofing agent valve 271 and accelerator valve 272 can be opened and closed simultaneously.

[0057] A first connection hose 16 is connected to the inlet 271a of the waterproofing agent valve 271 via an adapter or the like, and a waterproofing agent hose 271c is connected to the outlet 271b via an adapter or the like. A second connection hose 17 is connected to the inlet 272a of the accelerator valve 272 via an adapter or the like, and an accelerator hose 272c is connected to the outlet 272b via an adapter or the like.

[0058] Cross joint 273 has four openings 273a to 273d. Four openings 273a to 273d are connected to one another inside cross joint 273. In the plane shown in Fig. 7, adjacent openings form an angle of 90 degrees with one another. Waterproofing agent hose 271c is connected to first joint opening 273a via an adapter or the like.

[0059] The accelerator hose 272c is connected to the second joint opening 273b via a check valve 275, a flow control member 276, an adapter, and the like. The check valve 275 mainly includes a hexagon socket head screw 275a, a steel ball 275b, and a spring 275c, and prevents backflow of the accelerator. That is, the steel ball 275b and the spring 275c are fixed in the nipple 277 by the hexagon socket head screw 275a. In this state, the steel ball 275b is urged by the spring 275c to be pressed against the hexagon socket head screw 275a; in other words, it is urged in the opposite direction to the flow of the accelerator. When the curing accelerator flows from the accelerator hose 272c to the check valve 275, the pressure of the curing accelerator causes the steel ball 275b to push against the spring 275c and move, creating a space between the steel ball 275b and the hexagon socket head screw 275a through which the curing accelerator can pass. This allows the curing accelerator to pass through the check valve 275. On the other hand, if the curing accelerator attempts to flow back, the steel ball 275b is pushed by the spring 275c and tightly contacts the hexagon socket head screw 275a. This eliminates the space between the steel ball 275b and the hexagon socket head screw 275a, preventing the curing accelerator from flowing back. The flow control member 276 mainly includes a packing 276a, a nozzle tip 276b, and a nozzle nut 276c, and controls the flow rate of the curing accelerator. The packing 276a is made of a thin, annular fluororesin. The nozzle tip 276b has a cylindrical shape, and its inner diameter is determined appropriately depending on the required flow rate of the curing accelerator. The packing 276a, the nozzle tip 276b, and the nozzle nut 276c are housed by being sandwiched between the nipple 277 and the adapter 278b.

[0060] Third joint opening 273c is closed by detachable blind lid 273e screwed in via an adapter or the like, and third mixing tube 174c is connected to fourth joint opening 273d via an adapter or the like.

[0061] The function of the supply unit 270 will now be described. When the lever 274 is operated to open the waterproofing agent valve 271 and the accelerator valve 272, the waterproofing agent flows from the first connecting hose 16 through the waterproofing agent valve 271 and the waterproofing agent hose 271c into the cross joint 273. On the other hand, the curing accelerator flows from the second connecting hose 17 through the accelerator valve 272 and the accelerator hose 272c into the cross joint 273. Here, the curing accelerator passes through the check valve 275 and the flow rate control member 276 before flowing into the cross joint 273. By passing through the flow rate control member 276, the flow rate of the curing accelerator is adjusted so that the mixture ratio of the waterproofing agent and the curing accelerator is optimized.

[0062] Here, the waterproofing agent is pressurized by the first pump 311, and the hardening accelerator is pressurized by the second pump 312. In other words, each agent is pressurized by a different pump. Therefore, due to pump pulsation or a pressure difference, the pressure of the waterproofing agent may become higher than the pressure of the hardening accelerator in the cross joint 273, causing the waterproofing agent to flow back into the accelerator hose 272c. If the waterproofing agent flows back, it may react with the hardening accelerator in the accelerator hose 272c and harden, potentially clogging the accelerator hose 272c. However, because a check valve 275 is provided between the cross joint 273 and the accelerator hose 272c, the waterproofing agent does not flow back into the accelerator hose 272c, preventing it from clogging the accelerator hose 272c.

[0063] As described above, the waterproofing agent flows into the cross joint 273 through opening 273a, and the curing accelerator flows into the cross joint 273 through opening 273b. The combined waterproofing agent and curing accelerator then flow out through opening 273d. Here, openings 273a and 273b form a 90-degree angle, openings 273a and 273d form a 90-degree angle, and openings 273b and 273d form a 180-degree angle. Therefore, the waterproofing agent flows out of the cross joint 273 after a 90-degree turn, while the curing accelerator flows straight through the cross joint 273. This allows the curing accelerator to properly merge with the waterproofing agent and mix. Further stirring the waterproofing agent and curing accelerator in this state in the stirring unit 140 achieves a more optimal mixture. This allows the waterproofing agent and curing accelerator to be mixed in the appropriate ratio without clogging hoses or the like.

[0064] Next, we will explain how to clean the inside of the supply unit 270. Because the waterproofing agent mixed with the curing accelerator has a short curing time, it may harden even during a short period, such as during a worker's break. Therefore, the mixed waterproofing agent and curing accelerator must be cleaned and removed as needed. In this embodiment, the mixed waterproofing agent and curing accelerator are present inside the cross joint 273, the third mixing tube 174c, the agitation unit 140, and the discharge units 130a-130d, and these interiors must be cleaned. First, the blind cover 273e screwed into the third joint opening 273c is removed, and a pump (not shown) is connected. The pump then pumps the cleaning agent solvent into the cross joint 273. The cleaning agent then passes through the cross joint 273, the third mixing tube 174c, the agitation unit 140, and is discharged from the discharge units 130a-130d. This removes the waterproofing agent and hardening accelerator from the cross joint 273, the third mixing pipe 174c, the agitating section 140, and the discharge sections 130a to 130d, and cleans the insides of these components, allowing a single worker to easily clean the insides.

[0065] According to this embodiment, the same effects as those of the first embodiment can be obtained, and the waterproofing agent and the hardening accelerator can be mixed in an appropriate ratio without clogging the hose, etc., and the inside can be easily cleaned by one person.

[0066] In all the embodiments, the application device has been described as applying a one-component urethane waterproofing agent, but it may also apply a two-component waterproofing agent or other one-component or two-component paint.

[0067] The adjustment flow path does not necessarily have to include the oil tank 316. The fluid is not limited to oil. The first and second pumps 311 and 312 are not limited to single piston pumps, and may be any pumps that can discharge paint.

[0068] The radiator 317 may not be provided, in which case the first pressure reducing valve 314 is directly connected to the oil tank 316. Also, the first valve 318 and the second valve 319 may not be provided.

[0069] The inner diameters of the inner discharge portions 130b and 130c do not have to be smaller than the inner diameters of the outer discharge portions 130a and 130d, and may be the same.

[0070] Furthermore, the inner discharge portions 130b and 130c, and the outer discharge portions 130a and 130d do not have to be provided at equal distances from the center of the cage body 112 in the longitudinal direction.

[0071] The distance from the longitudinal center of the cage body 112 to the inner discharge portion 130b does not have to be longer than the distance between the inner discharge portion 130b and the outer discharge portion 130a. The same applies to the inner discharge portion 130c and the outer discharge portion 130d.

[0072] One side of the blade 111 may be linear instead of being sawtooth-shaped, and the two outer discharge portions 130a, 130d may not be located further inward than both ends of the blade 111 in the longitudinal direction.

[0073] The central axes of the multiple discharge portions 130a-130d do not necessarily need to be perpendicular to the longitudinal direction of the cage body 112, as long as they intersect with the longitudinal direction. The multiple discharge portions 130a-130d do not need to be installed so as to be parallel to the plane of the blade 111 that faces the discharge portions 130a-130d, as long as they are at an angle such that the discharged paint comes into direct contact with the surface to be painted without coming into contact with the blade 111.

[0074] Although the multiple discharge portions 130a to 130d have been described as being made up of cylindrical pipes, they may be made up of rectangular pipes or other tubular shapes other than cylindrical pipes.

[0075] The angle formed by adjacent openings 273a to 273d in cross joint 273 does not have to be 90 degrees, as long as it is at least less than 180 degrees. Cross joint 273 is only required to have at least three openings 273a to 273c, and opening 273d may not be provided. Furthermore, check valve 275 or flow rate control member 276 may not be provided.

[0076] Furthermore, the coating device 100 can spray paint not only on the roof of the building 20, but also on the street and indoors.

[0077] The size, shape, and quantity of each member shown in the present specification and drawings are examples and are not limited to these. Furthermore, the materials of each member are examples and are not limited to these.

[0078] Although embodiments of the present invention have been described herein with reference to the accompanying drawings, it will be apparent to those skilled in the art that modifications may be made in the structure and relationship of the parts without departing from the scope and spirit of the invention as described. [Explanation of symbols]

[0079] 10 Painting System 13 First Tank 14 Second Tank 15 Compressed air source 16 First connecting hose 17 Second connecting hose 18 Third connecting hose 100 Coating device 110 Cage section 111 Blade 112 Cage body 120 Gripping part 130a Outside discharge part 130b Inner discharge part 130c Inner discharge part 130d Outside discharge part 140 Stirring section 145 First Screw 146 Second Screw 150 air motor 162 Horizontal pipe 171 Waterproofing valve 172 Accelerator valve 173 Air valve 300 Feeding device 311 First Pump 312 Second Pump 314 First pressure reducing valve 315 Second pressure reducing valve

Claims

1. A coating system comprising a supply device and an application device, The supply device comprises: a fluid source; a first pump driven by fluid from the fluid source; a second pump driven by the fluid from the fluid source and having a discharge rate different from that of the first pump; an adjusting unit provided between the fluid source and the second pump, which adjusts the flow rate of fluid from the fluid source to the second pump; Equipped with The coating device is a cage body extending in a predetermined direction; a flat blade attached to the cage body; a plurality of discharge units attached to the cage body and configured to discharge paint; a gripping portion extending from the cage body in a direction intersecting the predetermined direction; an agitation unit attached to the gripping unit and supplying the paint to the plurality of discharge units; a horizontal pipe provided in the cage body and to which the discharge portion is attached; a pipe for sending the paint from the agitation unit to the horizontal pipe; Equipped with the plurality of discharge portions are arranged in the predetermined direction and attached to the horizontally running pipe, The discharge portion is a cylindrical pipe, and the central axis of the cylindrical pipe is perpendicular to the longitudinal direction of the cage body and is parallel to the blade, Discharge side tips of the plurality of discharge portions are disposed away from the blade, The first pump supplies a first material to the mixing section, and the second pump supplies a second material to the mixing section. Paint system.

2. The coating system of claim 1 , further comprising a metering passageway for flowing fluid from the metering portion to the fluid source.

3. 3. The coating system according to claim 1, wherein the discharge rate of the second pump is smaller than the discharge rate of the first pump.

4. The coating system according to claim 1 , further comprising an adjustment passage for causing the fluid to flow from the adjustment unit to the fluid source, the adjustment passage comprising a fluid reservoir for storing the fluid.

5. The apparatus further includes a cooling unit that cools the fluid and a fluid storage unit that stores the fluid, 5. The coating system according to claim 1, wherein the fluid source supplies the fluid to the cooling section, and the fluid that has passed through the cooling section flows into the fluid reservoir.

6. 6. The coating system according to claim 1, further comprising a first return path for flowing fluid from the first pump to the fluid source, and a second return path for flowing fluid from the second pump to the fluid source.

7. 7. The coating system of claim 1, wherein the second pump comprises a piston driven by the fluid from the adjusting section, the speed of the piston being adjusted by the fluid from the adjusting section.

8. The piping is connected to the horizontal pipe at the center of the cage body in the longitudinal direction, A coating system as described in any one of claims 1 to 7, wherein the plurality of discharge portions arranged in the predetermined direction include an inner discharge portion closer to the longitudinal center of the cage body and an outer discharge portion further away from the center in the longitudinal direction than the inner discharge portion, and the inner diameter of the inner discharge portion is shorter than the inner diameter of the outer discharge portion.

9. The piping is connected to the horizontal pipe at the center of the cage body in the longitudinal direction, The plurality of discharge portions arranged in the predetermined direction include an inner discharge portion close to a center in a longitudinal direction of the cage body, and an outer discharge portion farther from the center in the longitudinal direction than the inner discharge portion, 9. The coating system according to claim 1, wherein the inner discharge portion has two inner discharge portions equidistant from the center in the longitudinal direction, and the outer discharge portion includes two outer discharge portions equidistant from the center in the longitudinal direction.

10. A painting system described in any of claims 1 to 9, wherein the discharge portion discharges liquid in a direction perpendicular to the specified direction and parallel to the blade.

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