WO2018105048A1 - Automatic liquid coating device - Google Patents

Abstract

Provided is a coating device, which is capable of spray gun cleaning during spray standby and has a high degree of freedom of arm movements, and for which the supply line follows the arms well. An automatic liquid coating device is provided with: multiple spray gun units to which a liquid supply line is connected; a work arm, which is connected to a first spray gun unit that performs work; a spray gun unit standby section for holding a second spray gun unit that is not performing work at the ready; and a standby arm to be connected to the second spray gun unit that is being held at the ready at the spray gun unit standby section. Each spray gun unit is provided with a gas inflow part for receiving gas that is used to perform the spraying. The work arm and the standby arm are each provided with a gas outflow part for supplying gas to the gas inflow part. Gas is supplied from the gas outflow part of the standby arm to the gas inflow part of the second spray gun unit to clean the liquid supply line connected to the second spray gun unit that is in standby and the internal liquid passage of the spray gun unit.

Description

Automatic liquid applicator

The present invention relates to an automatic liquid coating apparatus.

Conventionally, a painting robot is known (see Patent Document 1). The painting robot includes a first paint system, a second paint system, a gantry, a robot body, a detection sensor, and a control panel. The first paint system has one spray gun, a plurality of paint tanks, and a switching valve provided between the plurality of paint tanks for selectively supplying the paints of the plurality of paint tanks to the one spray gun. is doing. The second coating system has another spray gun and a paint tank. The one spray gun and the other spray gun are placed on the gantry in a state of being arranged at predetermined positions. The robot body has a gripping mechanism for gripping one of the spray guns. The detection sensor detects that one of the spray guns has been gripped by the robot body and transmits a confirmation signal. The control panel controls the robot body and the switching valve. Based on the signal from the detection sensor, the control panel transmits a control signal to the switching valve in order to perform cleaning of the used spray gun on the gantry.

More specifically, each spray gun has a gas supply line for supplying gas for spraying from the spray gun (an operating gas line such as a needle valve or an atomizing gas line for atomizing paint) ) And a paint supply line for supplying the paint. That is, each spray gun is in a state where it can perform a painting operation as it is, and the robot uses the spray gun properly.

Since each spray gun is configured so that it can perform painting operations individually, cleaning liquid is supplied instead of paint to the paint supply line of spray guns that have already been painted. By performing this operation, the paint supply line can be cleaned.

Japanese Patent Publication No. 04-038459

By the way, in automatic painting using a robot, painting is performed on a wide range by moving the working arm of the robot. For this reason, the various supply lines (a gas supply line, a paint supply line, etc.) provided for every spray gun become long by the movement. And such a large number of long supply lines interferes with arm operation. In order to avoid this, it is necessary to set the movement of the arm so that the arm and the supply line do not interfere with each other. As a result, the degree of freedom of arm operation decreases.

Therefore, it can be considered that various supply lines provided in each spray gun are bundled and handled as a supply line bundle, that is, one supply line bundle is provided for each spray gun. In this way, the number of lines that must be considered for interference can be reduced to the number of supply line bundles. Therefore, the degree of freedom of arm operation can be increased.

However, even if the individual supply lines are flexible, if they are bundled, the rigidity becomes high. That is, when various supply lines are handled as a supply line bundle, flexibility is impaired and followability to the movement of the arm is reduced. For this reason, the operating speed of the arm must be suppressed.

An object of the present invention is to provide a coating apparatus that can clean the spray gun at least during spray standby but has a high degree of freedom of arm operation and good tracking of the supply line with respect to the movement of the arm.

The present invention can be realized as, for example, the following forms.
(1) The automatic liquid coating apparatus performs a work of applying a liquid to an object to be coated among a plurality of spray gun units to which a liquid supply line for supplying a liquid is directly connected and a plurality of spray gun units. A work arm that is detachably connected to the first spray gun unit, and a second spray gun unit that is not performing a work of applying a liquid to an object to be coated among a plurality of spray gun units. A spray gun unit standby section, and a standby arm detachably connected to a second spray gun unit waiting at the spray gun unit standby section. Each of the plurality of spray gun units includes a gas inflow portion that receives a gas for spraying a liquid. Each of the working arm and the standby arm includes a gas outflow portion that supplies gas to the gas inflow portion. The spray gun unit standby unit is configured to allow the second spray gun unit to wait so as not to inhibit the spraying of the liquid from the standby second spray gun unit. When the second spray gun unit is waiting at the spray gun unit standby section, the automatic liquid application device is in standby from the gas outflow section of the standby arm connected to the standby second spray gun unit. By supplying gas to the gas inflow part of the second spray gun unit in the middle, the liquid is sprayed from the second spray gun unit waiting and connected to the second spray gun unit waiting. The liquid supply line and the internal liquid passage of the spray gun unit are configured to be cleaned.
(2) In the form of (1), the automatic liquid coating apparatus is configured to fill the liquid supply line after washing with the coating liquid to be coated on the object.
(3) In the above aspect (1) or (2), the automatic liquid coating apparatus includes a cleaning unit that sprays the cleaning liquid toward the tip of the spray gun of the second spray gun unit that is on standby.
(4) In the configuration of (3) above, the automatic liquid coating apparatus includes a gas spraying unit that sprays gas toward the front end side of the spray gun of the second spray gun unit in standby.
(5) In any one of the above aspects (1) to (4), the spray gun unit standby unit includes a plurality of spray gun unit standby units, and the number of the plurality of spray gun units and the plurality of spray gun unit standby units. Is equal to the number of
(6) In the form of (5) above, the standby arm is provided for each of the plurality of spray gun unit standby units.

According to these embodiments, it is possible to provide a coating apparatus that can clean the spray gun at least during spraying standby, but has a high degree of freedom in arm operation and good followability of the supply line with respect to the movement of the arm.

It is a top view which shows typically arrangement | positioning of each part of the automatic liquid coating device of one Embodiment which concerns on this invention. It is an enlarged side view showing the spray gun unit standby part periphery of one embodiment concerning the present invention, and is a figure showing the state before a standby arm is connected to a spray gun unit. It is a figure which shows the structure of the liquid supply part of one Embodiment which concerns on this invention. It is an enlarged side view showing the spray gun unit standby part circumference of one embodiment concerning the present invention, and is a figure showing the state before a work arm is connected to a spray gun unit.

DETAILED DESCRIPTION Hereinafter, embodiments for carrying out the present invention (hereinafter, embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.

FIG. 1 is a top view schematically showing the arrangement of each part of an automatic liquid coating apparatus according to an embodiment of the present invention. As shown in FIG. 1, the automatic liquid application apparatus 1 includes a working arm 10, two standby arms 20, and a device base 30 to which the working arm 10 and the standby arm 20 are attached. I have.

In addition, the apparatus base 30 is provided with the same number of spray gun unit standby parts 31 as the spray gun units 40 for making the spray gun units 40 that perform liquid application work stand by.

The spray gun unit standby section 31 is formed with an opening 32 (see FIG. 2) that opens to the inside of the apparatus base 30. The spray gun unit 40 is supported by a support portion (not shown) in a state where the tip side of the spray gun unit 40 that sprays liquid is inserted into the opening 32. In this way, the spray gun unit 40 is put on standby at the spray gun unit standby unit 31.

As shown in FIG. 1, the standby arm 20 is provided for each spray gun unit standby unit 31, and the standby arm 20 waits at the spray gun unit standby unit 31 as will be described later. The spray gun unit 40 can be detachably connected.

On the other hand, the working arm 10 is an arm that is detachably connected to the spray gun unit 40 that performs the work of applying the liquid to the object to be coated, out of the two spray gun units 40. FIG. 1 shows a state where both of the two spray gun units 40 are waiting at the spray gun unit standby unit 31. Of these two spray gun units 40, the spray gun unit 40 that performs the operation of applying the liquid to the object to be coated is connected to the tip of the working arm 10 as indicated by the dotted line portion 40 '.

When the working arm 10 moves toward the spray gun unit 40 connected to the standby arm 20 for connection to the spray gun unit 40, the standby arm 20 is connected to the spray gun unit 40. The connection is released and retracted to a position where it does not interfere with the work arm 10.

FIG. 2 is an enlarged side view showing the periphery of the spray gun unit standby portion 31 and is a view showing a state before the standby arm 20 is connected to the spray gun unit 40. The state before the standby arm 20 is connected to the spray gun unit 40 is illustrated so that the spray gun unit 40 and the standby arm 20 can be easily distinguished. Further, in FIG. 2, illustration of a support portion that supports the spray gun unit 40 is omitted.

(Spray gun unit)
As shown in FIG. 2, the spray gun unit 40 includes a spray gun 41 and a connection joint 42 attached to the spray gun 41. The connection joint 42 includes a connection part 42a for detachably connecting to the standby arm 20, and gas inflow parts (42b, 42c, 42d, 42e) for receiving a gas for spraying liquid. I have.

Further, a liquid supply line 50 from a liquid supply unit 55 (not shown in FIG. 2), which will be described later, is directly connected to the spray gun unit 40. More specifically, the spray gun unit 40 includes a flow control valve 43 for eliminating fluctuations in the amount of liquid ejected from the spray gun 41, and a liquid supply line is connected to the liquid supply port of the flow control valve 43. 50 is connected. As a result, the liquid is supplied from the liquid supply line 50 to the spray gun 41 via the flow control valve 43.

On the other hand, regarding the gas for spraying, the gas supply line from the gas supply unit (not shown) is not directly connected to the spray gun unit 40. More specifically, the gas for spraying is received in the spray gun 41 from the standby arm 20 side through the gas inflow portions (42b, 42c, 42d, 42e) of the connection joint 42.

The gas inflow part 42b receives the atomized gas for atomizing the liquid ejected by the spray gun 41. The gas inflow portion 42c receives a pattern adjustment gas for adjusting the spray pattern of the liquid sprayed by the spray gun 41. The gas inflow portion 42d receives needle valve control gas for controlling the opening / closing operation of the needle valve that opens and closes the liquid ejection port of the spray gun 41. The gas inflow portion 42 e receives a gas for the flow control valve 43 for eliminating fluctuations in the amount of liquid ejected from the spray gun 41.

As shown in FIG. 2, the gas inflow portions (42 b, 42 c, 42 d) of the connection joint 42 are respectively gas supply ports (atomization gas supply port 45 b, pattern adjustment gas supply port 45 c, needle) of the corresponding spray gun 41. The valve control gas supply port 45d) is connected via a pipe. The gas inflow portion 42e is connected to the gas supply port of the flow control valve 43 through a pipe.

However, the number of gas inflow portions may be changed according to the configuration of the spray gun 41. For example, when the flow control valve 43 is not included in the configuration of the spray gun unit 40, the gas inflow portion 42e that receives the gas for the flow control valve may be omitted. When the spray gun 41 is configured so that the atomized gas for atomizing the liquid to be ejected and the pattern adjusting gas for adjusting the spray pattern are integrated in the same line, one gas flow The inlet may receive the atomizing gas and the pattern adjustment gas.

(Standby arm)
The standby arm 20 includes an arm portion 21 and a connection joint 22 attached to the arm portion 21. The connection joint 22 includes a connection portion 22a for detachably connecting to the spray gun unit 40, and a gas inflow portion (42b, 42c, 42d, 42e) of the spray gun unit 40 for spraying gas. And gas outflow portions (22b, 22c, 22d, 22e) for allowing gas to flow out to supply the air. A gas supply line from a gas supply section (not shown) is connected to the connection joint 22 so that gas flows out from the gas outflow sections (22b, 22c, 22d, 22e).

In the present embodiment, the gas outflow portion is configured to match the configuration of the spray gun 41 described above. Specifically, the gas outflow portion 22b causes the gas to flow out to the gas inflow portion 42b that receives the atomized gas for atomizing the ejected liquid. The gas outflow portion 22c causes the gas to flow out to the gas inflow portion 42c that receives the pattern adjustment gas for adjusting the spray pattern of the liquid to be sprayed. The gas outflow portion 22d causes the gas to flow out to the gas inflow portion 42d that receives the needle valve control gas that controls the opening / closing operation of the needle valve. The gas outflow portion 22e causes the gas to flow out to the gas inflow portion 42e that receives the gas for the flow control valve 43.

The connection portion 42a of the connection joint 42 of the spray gun unit 40 and the connection portion 22a of the connection joint 22 of the standby arm 20 are detachably fitted and connected, and the gas inflow portion (42b) of the connection joint 42 is also connected. , 42c, 42d, 42e) and the gas outflow portions (22b, 22c, 22d, 22e) of the connection joint 22 are connected by surface contact, the gas for spraying the gas out of the waiting arm 20 It can supply to the gas inflow part (42b, 42c, 42d, 42e) of the spray gun unit 40 from a part (22b, 22c, 22d, 22e). As a result, it becomes possible to spray the liquid of the spray gun unit 40 in a state of waiting in the spray gun unit standby unit 31.

FIG. 3 is a diagram showing a configuration of the liquid supply unit 55. As shown in FIG. 3, the liquid supply part 55 is connected to the manifold part 52, a plurality of liquid introduction lines 51 connected to the manifold part 52 via the valve 54, and to the manifold part 52 via the valve 54, And a single liquid introduction line 53 for introducing a cleaning liquid.

The liquid supply line 50 is connected to the manifold section 52 via the valve 54 in order to supply the liquid to the spray gun unit 40 from the liquid supply section 55 configured as described above.

In FIG. 3, the liquid introduction line 51 is a spray liquid introduction line that introduces paint or the like to be sprayed onto the object to be coated into the manifold portion 52. FIG. 3 shows a case where four liquid introduction lines 51 (spray liquid introduction lines) are provided so that liquids such as four kinds of paints can be selectively introduced into the manifold portion 52. However, the number of the liquid introduction lines 51 is not necessarily limited to four, and may be changed to three or less or five or more as necessary.

As described above, since the plurality of liquid introduction lines 51 are connected to the manifold portion 52, a single spray gun unit 40 can spray a plurality of types of liquids. In order to switch the liquid introduction line 51 communicating with the manifold section 52 and spray a different type of liquid from the liquid sprayed until then, from the manifold section 52 to the liquid discharge port of the spray gun 41 of the spray gun unit 40 Washing may be performed so as to remove the liquid remaining on the downstream side. In order to perform such cleaning, a liquid introduction line 53 for introducing a cleaning liquid is connected to the manifold portion 52 via a valve 54.

Then, as described above, the spray gun unit 40 in a state of waiting in the spray gun unit standby unit 31 is capable of spraying liquid by supplying gas for spraying from the standby arm 20 side. For this reason, the spray gun unit 40 is connected to the standby spray gun unit 40 by performing the spraying operation by switching the liquid supplied to the manifold unit 52 to the cleaning liquid while waiting in the spray gun unit standby unit 31. The liquid supply line 50 and the internal liquid passage of the spray gun unit 40 can be cleaned.

After the cleaning is completed, the cleaned spray gun unit 40 is filled with the liquid to be sprayed next until the liquid is sprayed on the object to be coated next.

More specifically, the cleaning liquid remains between the manifold portions 52 immediately after the cleaning is completed. Therefore, when the liquid is sprayed from the spray gun 41 of the spray gun unit 40 without replacing the accumulated cleaning liquid with the liquid to be sprayed next, the cleaning liquid is sprayed from the spray gun 41 for a while. Is done.

Therefore, in order to prevent the cleaning liquid from remaining in the region from the manifold section 52 to the liquid discharge port of the spray gun 41, the liquid to be used next is supplied to the manifold section 52, and the spray gun unit standby section 31 is supplied. The spray gun unit 40 that is standing by is allowed to perform a spraying operation (hereinafter also referred to as pre-spraying). As a result, the region from the manifold portion 52 to the liquid discharge port of the spray gun 41 of the spray gun unit 40 is filled with the liquid to be sprayed next.

This pre-spraying may be performed at the time of color change when the liquid is a paint. Pre-spraying may be performed immediately after washing. However, in the case of a liquid that is easily fixed when dried, such as a paint, pre-cleaning may be performed immediately before the spraying of the next liquid in accordance with the timing of starting the spraying of the next liquid.

On the other hand, as shown in FIG. 2, an opening portion 32 for introducing the tip end side of the spray gun unit 40 waiting in the spray gun unit standby portion 31 into the internal side of the device stand 30 is provided inside the device stand 30. Correspondingly, a cleaning pod 37 is provided. For this reason, the liquid sprayed at the time of washing | cleaning does not leak outside.

Incidentally, when the operation of spraying the liquid is performed, the sprayed liquid may adhere to the surface on the tip side of the spray gun 41 of the spray gun unit 40. As described above, in the operation of spraying the cleaning liquid from the spray gun unit 40, since the cleaning liquid is not sprayed toward the liquid attached to the surface, the liquid such as paint attached to the surface cannot be efficiently cleaned. .

Therefore, as shown in FIG. 2, a cleaning unit 35 for spraying the cleaning liquid toward the tip side of the spray gun 41 of the spray gun unit 40 is disposed inside the apparatus base 30. Therefore, by spraying the cleaning liquid from the cleaning unit 35 toward the front end side of the spray gun 41, it is possible to efficiently wash away liquid such as paint adhering to the front end side surface of the spray gun 41.

When performing an operation of spraying the cleaning liquid from the cleaning unit 35 toward the tip side of the spray gun 41 of the spray gun unit 40, at least an atomizing gas for atomizing the liquid ejected by the spray gun 41, and a spray pattern May be supplied to the spray gun unit 40 so that the atomizing gas and the pattern adjusting gas are ejected from the spray gun 41.

As described above, when the atomized gas and the pattern adjusting gas are ejected from the spray gun 41, the cleaning liquid sprayed from the cleaning unit 35 is prevented from entering the ejection port from which the gas is ejected. It is possible.

Further, the automatic liquid application apparatus 1 of the present embodiment includes a gas spraying unit 36 that sprays gas toward the tip of the spray gun 41 of the spray gun unit 40 that stands by in the spray gun unit standby unit 31. Therefore, after cleaning the front end side of the spray gun 41, the front end side of the spray gun 41 can be dried by blowing gas to the front end side of the spray gun 41. Therefore, the state of the spray gun unit 40 can be made ready for use.

(Working arm)
The work arm 10 is an arm for performing an operation of spraying a liquid such as a paint on a workpiece. The working gun 10 is detachably connected to the spray gun unit 40 that performs the work of applying a liquid to the object of the spray gun unit 40. Hereinafter, the configuration of the working arm 10 will be described with reference to FIG.

FIG. 4 is an enlarged side view showing the periphery of the spray gun unit standby portion 31 as in FIG. 2, and shows a state before the working arm 10 is connected to the spray gun unit 40. FIG.

As shown in FIG. 4, the working arm 10 includes an arm portion 11 and a connection joint 12 attached to the arm portion 11. The connection joint 12 includes a connection part 12a for detachably connecting to the spray gun unit 40, and a gas for spraying the gas inflow parts (42b, 42c, 42d, 42e) of the spray gun unit 40. Gas outlets (12b, 12c, 12d, 12e) for allowing gas to flow out. A gas supply line from a gas supply part (not shown) is connected to the connection joint 12 so that gas flows out from the gas outflow parts (12b, 12c, 12d, 12e).

In the present embodiment, the gas outflow portion is configured to match the configuration of the spray gun 41 described above. Specifically, the gas outflow part 12b makes gas flow out with respect to the gas inflow part 42b which receives the atomization gas for atomizing the liquid to eject. The gas outflow portion 12c causes the gas to flow out to the gas inflow portion 42c that receives the pattern adjustment gas for adjusting the spray pattern of the liquid to be sprayed. The gas outflow portion 12d causes the gas to flow out to the gas inflow portion 42d that receives the needle valve control gas that controls the opening / closing operation of the needle valve. The gas outflow portion 12e causes the gas to flow out to the gas inflow portion 42e that receives the gas for the flow control valve 43.

That is, the connection joint 12 provided in the working arm 10 has the same configuration as the connection joint 22 provided in the standby arm 20.

The connection portion 42a of the connection joint 42 of the spray gun unit 40 and the connection portion 12a of the connection joint 12 of the work arm 10 are detachably fitted and connected, and the gas inflow portion (42b) of the connection joint 42 is connected. , 42c, 42d, 42e) and the gas outflow portions (12b, 12c, 12d, 12e) of the connection joint 12 are connected by surface contact, the gas for spraying is discharged from the working arm 10 It can supply to the gas inflow part (42b, 42c, 42d, 42e) of the spray gun unit 40 from a part (12b, 12c, 12d, 12e). As a result, it is possible to spray liquid on the object to be coated.

The operation and effect of the automatic liquid coating apparatus 1 of the present embodiment having the above configuration will be described below. As described above, in the automatic liquid coating apparatus 1 of the present embodiment, the gas supply line from the gas supply unit that supplies the gas for spraying the liquid is not directly connected to the spray gun unit 40. And connected to the working arm 10 and the standby arm 20.

The standby arm 20 can be disposed at a position that does not interfere with the movement of the work arm 10, and a gas supply line connected to the standby arm 20 disposed at a position that does not interfere with the movement of the work arm 10 is also provided. It can be routed so as not to interfere with the working arm 10.

On the other hand, since the gas supply line connected to the work arm 10 can also be provided exclusively for the work arm 10, it can be provided so as not to interfere with the operation of the work arm 10. Therefore, it is possible to greatly reduce piping that may interfere with the operation of the working arm 10.

Moreover, since only the liquid supply line 50 of the gas supply line and the liquid supply line 50 is connected to the spray gun unit 40, the rigidity of the line becomes high as when a plurality of lines are bundled. There is no. That is, the followability with respect to the operation of the work arm 10 does not deteriorate.

The gas supply line of the gas for spraying is not directly connected to the spray gun unit 40, and the spray gun unit 40 cannot spray liquid for cleaning by itself. However, since the gas supply line of the gas for performing the spraying is connected to the standby arm 20, the spray gun unit 40 can perform a cleaning operation while waiting in the spray gun unit standby unit 31. It is.

Accordingly, while one working arm 10 is performing the application operation with the spray gun unit 40, another spray gun unit 40 waiting in the spray gun unit standby section 31 is prepared for the next liquid application operation. It is possible to prepare.

As a result, the work arm 10 causes the spray gun unit 40 that has been used for spraying until now to wait in the spray gun unit standby section 31 corresponding to the spray gun unit 40 and prepares for the next application work (the liquid is removed). The preparation including the color change of the paint in the case of the paint is completed, and only the spray gun unit 40 waiting in the spray gun unit standby section 31 is connected to the next application work. Therefore, it is possible to realize a continuous liquid application operation with a small time lag.

Moreover, in this embodiment, the cleaning of the spray gun unit 40 while waiting in the spray gun unit standby unit 31 is performed not only on the liquid supply line 50 and the internal liquid passages of the spray gun unit 40 but also on the spray gun unit 40. The tip side surface can also be cleaned. For this reason, it is possible to realize a continuous liquid application operation in an extremely clean state.

As described above, the automatic liquid coating apparatus according to the present invention has been described based on the specific embodiment, but the present invention is not limited to the specific embodiment. For example, in the above-described embodiment, the case where the working arm 10 and the standby arm 20 are provided on the same device stand 30 has been described. However, the working arm 10 and the stand-by arm 20 are respectively on separate device stands. May be arranged. Further, the number of spray gun unit standby sections 31 may be larger or smaller than the number of spray gun units 40. Furthermore, the number of standby arms 20 may be smaller than the number of spray gun unit standby units 31. That is, one standby arm 20 may be commonly used by two or more spray gun unit standby units 31.

Further, the spray gun unit standby section 31 may be provided adjacent to the standby arm 20. In the spray gun unit standby section 31 having such a configuration, the working arm 10 and the standby arm 20 may be installed in a booth. Further, a cleaning operation or the like can be performed in the booth, and a configuration in which the spray gun unit 40 can be placed may be provided.

Furthermore, the arm portion 11 of the working arm 10 and the arm portion 21 of the standby arm 20 may be commercially available as long as necessary arm operation is possible, and the configuration itself is arbitrary.

In addition, in the present embodiment, a case where one working arm 10 and two spray gun unit standby portions 31 and standby arms 20 are provided is shown. However, a plurality of working arms 10 may be provided. The spray gun unit standby unit 31 and the standby arm 20 need not be limited to two, and more spray gun unit standby units 31 and standby arms 20 may be provided. The number of spray gun unit standby sections 31 and standby arms 20 may be greater than the number of working arms 10. In this way, work efficiency is improved.

Furthermore, in addition, in this embodiment, the case where the spray gun unit 40 includes the spray gun 41 and the connection joint 42 has been described. However, the spray gun 41 itself may have a configuration of the connection joint 42. In this case, the spray gun 41 is manufactured based on a design different from a general commercially available spray gun.

On the other hand, according to the configuration in which the connection joint 42 is attached to the spray gun 41 as in this embodiment, a commercially available spray gun can be used as it is.

In addition, when the spray gun is an electrostatic spray gun that charges the sprayed particles and applies it to the substrate with high efficiency, a voltage cable that supplies power to the electrostatic spray gun is connected to each spray gun. The voltage cables may be connected and bundled together with the liquid supply line 50.

As described above, the present invention is not limited to the above-described embodiment, and it is obvious to those skilled in the art that various changes or improvements can be made. Is also included in the technical scope of the present invention from the description of the claims. In addition, any combination or omission of each constituent element described in the claims and the specification is possible within a range where at least a part of the above-described problems can be solved or a range where at least a part of the effect is achieved. It is.

DESCRIPTION OF SYMBOLS 1 Automatic liquid coating apparatus 10 Working arm 11 Arm part 12 Connection joint 12a Connection part 12b, 12c, 12d, 12e Gas outflow part 20 Standby arm 21 Arm part 22 Connection joint 22a Connection part 22b, 22c, 22d, 22e Gas outflow Unit 30 device base 31 spray gun unit standby unit 32 opening 35 cleaning unit 36 gas spraying unit 37 cleaning pod 40 spray gun unit 41 spray gun 42 connection joint 42a connection units 42b, 42c, 42d, 42e gas inflow unit 43 flow control valve 45b, 45c, 45d, 45e Gas supply 50 liquid supply line 51, 53, the liquid introduction line 52 manifold portion 54 valve 55 Liquid supply unit

Claims (6)

An automatic liquid application device,
A plurality of spray gun units to which liquid supply lines for supplying liquid are directly connected;
A working arm that is detachably connected to a first spray gun unit that performs an operation of applying the liquid to an object to be coated among the plurality of spray gun units;
A spray gun unit standby section for waiting a second spray gun unit that is not performing an operation of applying the liquid to the object to be coated among the plurality of spray gun units;
A standby arm detachably connected to the second spray gun unit waiting at the spray gun unit standby section;
With
Each of the plurality of spray gun units includes a gas inflow portion that receives a gas for spraying the liquid,
Each of the working arm and the standby arm includes a gas outflow portion that supplies the gas to the gas inflow portion,
The spray gun unit standby unit is configured such that the second spray gun unit can wait so as not to hinder the spraying of the liquid from the second spray gun unit waiting.
When the second spray gun unit is waiting at the spray gun unit standby section, the automatic liquid application apparatus is configured to receive the standby arm connected to the standby spray gun unit. By supplying the gas from the gas outflow portion to the gas inflow portion of the standby second spray gun unit, liquid is sprayed from the standby second spray gun unit, and the standby An automatic liquid application device configured to clean the liquid supply line connected to the second spray gun unit and an internal liquid passage of the spray gun unit. The automatic liquid application device according to claim 1,
An automatic liquid coating apparatus configured to fill the liquid supply line after washing with a coating liquid to be coated on the object. The automatic liquid application apparatus according to claim 1 or 2,
An automatic liquid coating apparatus comprising: a cleaning unit that sprays a cleaning liquid toward a tip side of a spray gun of the second spray gun unit that is on standby. The automatic liquid application apparatus according to claim 3,
An automatic liquid coating apparatus comprising: a gas spraying unit that sprays gas toward a tip end side of the spray gun of the second spray gun unit in standby. An automatic liquid application device according to any one of claims 1 to 4,
The spray gun unit standby unit includes a plurality of spray gun unit standby units,
An automatic liquid coating apparatus in which the number of the plurality of spray gun units is equal to the number of the plurality of spray gun unit standby units. The automatic liquid coating apparatus according to claim 5,
The standby arm is an automatic liquid application device provided for each of the plurality of spray gun unit standby units.

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