JP4578981B2 - Cartridge tank and coating machine - Google Patents

Description

  The present invention relates to a cartridge tank that stores a paint and an extrusion liquid for delivering the paint to a coating machine, and a coating machine to which the cartridge tank is detachably mounted.

2. Description of the Related Art Conventionally, there are known coating machines that are detachably mounted with a cartridge tank that stores paint, and change color by mounting a cartridge tank that stores paint of different colors. A coating machine configured as a head type coating machine is known.
As a cartridge tank that is detachably attached to the coating machine, the coating material and an extrusion liquid for sending the coating material to the coating machine are stored in the tank, and the coating material storage chamber in which the coating material is stored and the extrusion liquid There is known a structure in which an extruded liquid storage chamber in which is stored is defined by a piston member or a film member having flexibility or stretchability.
In such a cartridge tank, the piston member and the membrane member are pushed by the liquid to be sent out to the coating machine.
A cartridge tank in which a paint storage chamber and an extruded liquid are defined by a piston member is described in Patent Document 1, for example.
JP 2000-176328 A

In the cartridge tank described in the above-mentioned Patent Document 1 in which the paint member chamber and the extruded liquid chamber are defined by the piston member, the piston member is slidably provided in the cylinder formed in the cartridge tank. The space in the cylinder is defined by a paint storage chamber and an extrusion liquid storage chamber, and a seal member is provided on the outer periphery of the piston member to seal the paint storage chamber and the extrusion liquid storage chamber in a liquid-tight manner. ing.
However, the seal member provided on the piston member slides on the inner wall surface of the cylinder when supplying paint to the coating machine or when supplying paint to the paint storage chamber, etc. The liquid tightness between the paint chamber and the extruded liquid chamber cannot be maintained. Thus, if the liquid tightness between the paint storage chamber and the extrusion liquid storage chamber cannot be maintained, the paint in the paint storage chamber and the extrusion liquid in the extrusion liquid storage chamber are mixed, and the electrical insulation of the extrusion liquid decreases. For this reason, a decrease in the sealing performance of the seal member has caused a decrease in coating quality.
In addition, the paint quality may deteriorate due to the paint remaining in a slight gap formed between the sliding piston member and the cylinder inner wall surface after cleaning the paint storage chamber.
In addition, the piston type cartridge tank in which the paint storage chamber and the extruded liquid storage chamber are liquid-tightly defined by the sliding piston member requires a high dimensional accuracy for each component member, resulting in a relatively high manufacturing cost. This was a factor that increased the overall cost of the painting machine.

Therefore, a membrane type cartridge tank that does not require high accuracy like the piston type and can be constructed at a relatively low cost has been realized. This membrane-type cartridge tank defines a paint storage chamber and an extrusion liquid storage chamber by forming a film having stretchability or flexibility.
However, image formation also repeats expansion and contraction and bending when the paint is supplied to the coating machine and when the paint container is filled, so the image formation is damaged and the paint and the extrusion liquid are mixed. There is a problem of end.
In addition, if the coating film is damaged and the paint and the extrusion liquid are mixed, it is not possible to immediately recognize from the outside of the cartridge tank that the coating film has been damaged. May affect the quality of the paint.

  Therefore, in the present invention, a cartridge tank in which the paint storage chamber and the extrusion liquid storage chamber are defined by image formation, and even if the image formation is damaged, the paint and the extrusion liquid are mixed. In addition, the present invention provides a cartridge tank capable of preventing the image formation and further detecting that the image forming film is damaged at an early stage, and a coating machine equipped with the cartridge tank.

A cartridge tank and a coating machine that solve the above problems have the following characteristics.
That is, as described in claim 1, a cartridge tank that contains paint and an extrusion liquid for sending the paint to the coating machine and is detachably attached to the coating machine, the paint container containing the paint. The chamber and the extruded liquid storage chamber in which the extruded liquid is accommodated are defined by image formation composed of the first film and the second film, and the first film and the second film of the image formation are defined A gap is formed between the film and the outside of the cartridge tank, and a pin member is slidably fitted in the passage. Protrudes to the outside of the cartridge tank when pressure is applied in the gap between the first film and the second film for image formation.
Thereby, for example, even when one of the first film and the second film is damaged, the paint film storage chamber and the extrusion liquid storage chamber are defined by the other second film or the first film. Therefore, the paint storage chamber and the extrusion liquid storage chamber communicate with each other, so that the paint and the extrusion liquid can be prevented from being mixed, and the coating quality can be prevented from deteriorating.
When the first film or the second film is damaged, the paint or the extrusion liquid flows out from the damaged part of the film into the gap, and further leaks out of the cartridge tank through the communication path connected to the gap. As a result, it is possible to quickly find that the first film or the second film is damaged, and to repair the cartridge tank before the coating quality is affected.
Furthermore, it is possible to quickly grasp that the first film or the second film is damaged, and to perform the repair work before the coating quality is affected.
In addition, since the paint or extrusion liquid that has flowed out of the paint storage chamber or the extrusion liquid storage chamber does not leak to the outside by the pin member fitted in the communication path, the cartridge tank or the coating machine can be used for coating or extrusion. It is not soiled by liquid.

According to a second aspect of the present invention, the paint and the extrusion liquid for sending the paint to the coating machine are accommodated, the paint accommodation chamber in which the paint is accommodated, and the extrusion liquid accommodation chamber in which the extrusion liquid is accommodated. Is formed by image formation composed of a first film and a second film, and a gap is formed between the first film and the second film of the image formation, and the gap A communication passage communicating with the outside of the cartridge tank is formed , and a pin member is slidably fitted in the communication passage , and the pin member includes a first film and a second film of the image forming film. When a pressure is applied to the gap between the film and the membrane, the cartridge tank is detachably attached to the cartridge tank that protrudes to the outside of the cartridge tank.
Thereby, for example, even when one of the first film and the second film is damaged, the paint film storage chamber and the extrusion liquid storage chamber are defined by the other second film or the first film. Therefore, the paint storage chamber and the extrusion liquid storage chamber communicate with each other, so that the paint and the extrusion liquid can be prevented from being mixed, and the coating quality can be prevented from deteriorating.
When the first film or the second film is damaged, the paint or the extrusion liquid flows out from the damaged part of the film into the gap, and further leaks out of the cartridge tank through the communication path connected to the gap. As a result, it is possible to quickly find that the first film or the second film is damaged, and to repair the cartridge tank before the coating quality is affected.
Furthermore, it is possible to quickly grasp that the first film or the second film is damaged and perform the repair work before the coating quality is affected.
In addition, since the paint or extrusion liquid that has flowed out of the paint storage chamber or the extrusion liquid storage chamber does not leak to the outside by the pin member fitted in the communication path, the cartridge tank or the coating machine can be used for coating or extrusion. It is not soiled by liquid.

  According to the present invention, it is possible to quickly find that the first film or the second film is damaged, and it is possible to perform the repair work of the cartridge tank before the coating quality is affected.

  Next, modes for carrying out the present invention will be described with reference to the accompanying drawings.

First, a coating machine to which a cartridge tank according to the present invention is mounted will be described.
A coating machine 1 shown in FIG. 1 is a cartridge tank in which a rotary atomizing head 14 serving as a paint outlet is rotatably attached to one side (left side in FIG. 1) of a housing 12 and the other side of the housing 12 is filled with paint. 11 is a cartridge type coating machine for electrostatic coating, which is configured by detachably mounting 11.

The tank body 16 of the cartridge tank 11 is formed with a cylinder 17 serving as a space filled with paint and a liquid for extruding paint, and the open end side of the cylinder 17 is closed by a cap 31.
A space in the cylinder 17 is defined by a film formation 22 into a paint storage chamber 17a and an extrusion liquid storage chamber 17b. The paint storage chamber 17a and the extrusion liquid storage chamber 17b are respectively provided with paint and extrusion. Contains liquid for use.

  The image forming film 22 is composed of a double film in which a first film 22a and a second film 22b are overlapped, and the first film 22a and the second film 22b are both flexible or stretchable. It is comprised with the member which has. Specifically, the first film 22a and the second film 22b are made of a synthetic resin film such as polypropylene (PP) or polyethylene (PE).

  From the tank body 16, a paint supply passage 16 a extends in the housing 12 toward the rotary atomizing head 14, and the paint filled in the paint storage chamber 17 a of the cylinder 17 is rotated by the paint supply passage 16 a. Guided to atomizing head 14.

In addition, a paint valve 19 for switching the spraying and stopping of the paint from the rotary atomizing head 14 is slidably inserted into the paint supply passage 16a. That is, by sliding the paint valve 19, the opening or closing of the paint supply passage 16a can be switched, whereby the spraying and stopping of the paint from the rotary atomizing head 14 can be switched.
A high voltage generated by a high voltage generator (cascade) 20 is applied to the shaping air ring 15 and the rotary atomizing head 14 arranged on one end side of the housing 12.

The rotary atomizing head 14 is driven to rotate by an air motor 13, and the paint supplied to the rotary atomizing head 14 through the paint supply passage 16 is charged by the rotary atomizing head 14 and centrifugally atomized. The particles are sprayed as charged paint particles.
The charged paint particles fly along an electrostatic field formed between the rotary atomizing head 14 applied with a high voltage and the object to be grounded, and are applied to the object to be coated.

  The shaping air ring 15 has a large number of shaping air ejection holes formed in an annular shape, and the shaping air is ejected from the shaping air ejection holes toward the charged paint particle discharge edge of the rotary atomizing head 14. The pattern formation of the charged coating particles discharged from the rotary atomizing head 14 is performed.

The paint filled in the paint storage chamber 17a of the tank body 16 and sprayed from the rotary atomizing head 14 is supplied to the rotary atomizing head 14 by the extrusion liquid pumped to the extrusion liquid storage chamber 17b.
That is, the extrusion liquid is pumped into the extrusion liquid storage chamber 17b through the extrusion liquid supply passage 12a formed in the housing 12 and the extrusion liquid supply chamber 17c. Then, the image forming film 22 is expanded by the pumping liquid to be pumped, the volume of the liquid container 17b for extruding is expanded, and the volume of the paint container 17a is decreased, so that the paint is pushed out from the paint container 17a. Is supplied to the rotary atomizing head 14.

In this way, the image forming film 22 is extended by the extruding liquid to expand the volume of the extruding liquid storage chamber 17b, and pressure is applied to the paint filled in the paint filling space 17a of the tank body 16 to rotate. The fuel is supplied to the atomizing head 14 and sprayed.
Further, as the extrusion liquid pumped to the extrusion liquid storage chamber 17b, for example, an electrically insulating liquid such as an organic solvent is used.

Next, the cartridge tank 11 attached to the coating machine 1 will be described.
As shown in FIGS. 1 and 2, the cartridge tank 11 is schematically configured by a tank body 16, an image forming unit 21, a cap 31, and the like.
The image forming unit 21 includes an image forming film 22 that defines a paint containing chamber 17 a and an extrusion liquid containing chamber 17 b formed in the cylinder 17 of the tank body 16, and a base 23 that supports the image forming film 22. It is roughly structured.

  The base 23 is formed with a plurality of passages 23a communicating the extrusion liquid storage chamber 17b and the extrusion liquid supply chamber 17c. Through this passage 23a, the extrusion liquid pressure-fed from the extrusion liquid supply passage 12a of the housing 12 to the extrusion liquid supply chamber 17c is supplied into the extrusion liquid storage chamber 17b.

As shown in FIG. 3, the image forming film 22 is composed of a first film 22a located on the paint containing chamber 17a side and a second film 22b located on the extruded liquid containing chamber 17b side, and the first film 22a and the 2nd film | membrane 22b are comprised by the double film | membrane arrange | positioned through the clearance gap 22c.
The gap 22c is liquid-tightly connected to an annular passage 23b (shown in FIG. 4) formed in the base 23, and a connection passage 23c extends radially outward from a part of the annular passage 23b.

The tank body 16 is formed with a communication path 16b that communicates the inside of the cylinder 17 with the outside, and a connection path 23c formed on the base 23 and a communication path 16b are connected.
Thereby, the gap 22c between the first film 22a and the second film 22b communicates with the outside of the tank body 16 through the annular passage 23b, the connection path 23c, and the communication path 16b.

The image forming unit 21 is detachably fitted in the cylinder 17. After the image forming unit 21 is fitted to the cylinder 17, the cap 31 is screwed to the tank body 16. The cartridge tank 11 is assembled.
A protrusion 31a protruding in the direction of the image forming unit 21 is formed at a substantially central portion of the cap 31, and when the cap 31 is screwed to the tank body 16, the base 23 is coated with the protrusion 31a. The base 23 is pressed against the stepped portion of the cylinder 17 and fixed in the direction of the accommodating chamber 17a.

  Thus, the cartridge tank 11 is configured, and the image forming film 22 that defines the paint storage chamber 17a and the extrusion liquid storage chamber 17b is configured by a double film of the first film 22a and the second film 22b. As a result, when the paint is supplied to the coating machine or when the paint is filled in the paint storage chamber, the image forming film 22 is repeatedly expanded and contracted and deteriorated, and for example, one of the first film 22a and the second film 22b is damaged. Even in this case, since the other second film 22b or the first film 22a defines the paint storage chamber 17a and the extrusion liquid storage chamber 17b, the paint storage chamber 17a and the extrusion liquid storage chamber 17b. Can be prevented from mixing and the paint and the liquid for extrusion can be prevented from mixing, and deterioration in coating quality can be prevented.

  Further, when the first film 22a or the second film 22b is damaged, the paint or the extrusion liquid flows out from the damaged part of the film into the gap 22c, and further through the annular passage 23b, the connection passage 23c, and the communication passage 16b, the tank body. 16, the first film 22a or the second film 22b can be quickly found to be damaged, and the cartridge tank 11 is repaired before the coating quality is affected. be able to.

Further, the portion of the communication passage 16b of the tank body 16 can be configured as follows so that the breakage of the first film 22a and the second film 22b can be recognized from the outside of the cartridge tank 11.
That is, as shown in FIG. 6, the outer portion 160 in the communication passage 16 b of the tank body 16 is formed to have a smaller diameter than the inner portion 161, and the stepped portion 162 is formed between the outer portion 160 and the inner portion 161. .

A recognition pin 33 is provided in the communication path 16b. The recognition pin 33 includes a pressure receiving portion 33a that is slidably fitted in the inner portion 161 of the communication path 16b, and a recognition portion 33b that protrudes outward from the pressure receiving portion 33a. The outer portion 160 of the passage 16b is slidably inserted.
A seal member 34 such as an O-ring is fitted on the outer periphery of the pressure receiving portion 33a, and the seal member 34 seals the inner peripheral surface of the inner portion 161 and the outer peripheral surface of the pressure receiving portion 33a in a liquid-tight manner. Yes.

  When the recognition pin 33 thus fitted in the communication path 16b is in a normal state where both the first film 22a and the second film 22b are not damaged, the recognition part 33b protrudes to the outside as shown in FIG. It is in the state which is settled in the outer side part 160 so that it may not.

On the other hand, when one of the first film 22a or the second film 22b is damaged and the paint or the extrusion liquid flows out from the gap 22c into the communication path 16b, the pressure of the paint or the extrusion liquid that has flowed out is received by the pressure receiving portion 33a. Then, the recognition pin 33 is pushed outward in the communication path 16b.
When the recognition pin 33 is pushed outward, the recognition portion 33b protrudes from the outside portion 160 to the outside of the tank body 16, as shown in FIG.

By recognizing the recognition part 33b projecting to the outside, it is possible to find the breakage of the first film 22a or the second film 22b.
Note that the recognition pin 33 pushed outward cannot protrude further outward when the recognition portion 33b contacts the stepped portion 162 of the communication path 16b, so that the recognition pin 33 does not fall off.

As described above, when the first film 22a or the second film 22b is damaged, and the pressure is applied to the gap 22c by the paint or the extrusion liquid, the recognition pin 33 that protrudes to the outside is provided. Alternatively, it is possible to quickly grasp that the second film 22b is damaged and perform the repair work before the coating quality is affected.
In this case, the paint or the extrusion liquid flowing out from the paint storage chamber 17a or the extrusion liquid storage chamber 17b is not leaked to the outside by the recognition pin 33 fitted in the communication path 16b, and the cartridge tank 11 or the coating machine 1 is not soiled by paint or extrusion liquid.

Next, a second embodiment of the cartridge tank 11 will be described.
The cartridge tank 11 shown in FIGS. 8 and 9 is mainly different from the cartridge tank 11 shown in FIG.
The image forming unit 21 in this example includes a paint container 24 in addition to the image forming film 22 and the base 23.

The coating material container 24 is attached to the base 23 so as to cover the image forming film 22 attached to the base 23, and the extrusion liquid storage chamber 21 b is formed by the base 23 and the image forming film 22. The paint film forming chamber 21 a is formed by the image forming film 22 and the paint container 24.
That is, the image forming unit 21 in this example itself includes a paint storage chamber 21a and an extrusion liquid storage chamber 21b.
The image forming unit 21 is detachably attached to the cylinder 17 of the tank body 16.

The base 23 of the image forming unit 21 is formed with the annular passage 23b and the connection passage 23c, and further, an extrusion liquid passage 23d is formed instead of the passage 23a.
The extrusion liquid passage 23 d is connected to the connection passage 16 d of the tank body 16 that communicates with the extrusion liquid supply passage 12 a of the housing 12 in a state where the image forming unit 21 is mounted on the cylinder 17. The extruding liquid supplied from 12a is allowed to flow into the extruding liquid storage chamber 21b.

  Further, when one of the first film 22a and the second film 22b constituting the image forming film 22 is damaged, the paint or the extrusion liquid is transferred from the paint storage chamber 21a or the extrusion liquid storage chamber 21b to the first film 22a. It flows out into the gap 22c with the second film 22b, and further leaks out of the tank body 16 through the annular passage 23b, the connection passage 23c, and the communication passage 16b.

A male paint connecting portion 21c protrudes from the front end portion (left end portion in FIGS. 8 and 9) of the paint container 24, and a male paint is provided at a position corresponding to the male paint connecting portion 21c in the cylinder 17 of the tank body 16. A concave female paint connecting portion 16c is formed in accordance with the protruding shape of the connecting portion 21c.
When the image forming unit 21 is mounted on the cylinder 17, the male paint connecting portion 21c and the female paint connecting portion 16c are fitted in a liquid-tight manner, and the paint containing chamber 21a and the paint supply passage 16a are communicated with each other. is doing.

  A check valve 121a is formed in the male paint connecting portion 21c of the paint container 24. When the paint container 24 is not completely attached to the cylinder 17, as shown in FIG. The ball valve body 121b in the valve 121a is seated on the seat portion 121d by the urging force of the urging member 121c such as a spring, and the check valve 121a is closed. Thereby, the inside of the paint storage chamber 21a and the paint supply passage 16a are separated.

On the other hand, as shown in FIG. 10B, when the paint container 24 is completely attached to the cylinder 17, it is attached in the paint supply passage 16a and in the fitting recess 116a of the female paint connecting portion 16c. The protruding pin 116b that protrudes pushes the ball valve body 121b of the check valve 121a.
When the ball valve body 121b is pushed by the projecting pin 116b, the ball valve body 121b is separated from the seat portion 121d against the biasing force of the biasing member 121c, and the check valve 121a is opened, and the paint storage chamber The inside of 21a and the coating material supply path 16a communicate, and the distribution of the coating material from the coating material storage chamber 21a to the coating material supply path 16a becomes possible.

  In the cartridge tank 11 of this example, the cap 31 merely functions as a support member for fixing the position of the image forming unit 21 mounted on the cylinder 17, and the cartridge tank shown in FIG. 11 does not constitute the extrusion liquid supply chamber 17c.

  As described above, in the cartridge tank 11 in this example, the paint chamber 21a and the extrusion liquid chamber 21b are not configured by using the tank body 16 and the cap 31, but by the image forming unit 21 itself. Therefore, the tank main body 16 substantially functions only as a positioning case for the image forming unit 21.

Therefore, even if the tank main body 16 is formed thin or a hole is formed at an appropriate position of the tank main body 16, the function of the tank main body 16 is not impaired, and the tank main body 16 can be reduced in weight. it can.
As a result, the weight of the entire coating machine 1 to which the cartridge tank 11 is mounted can be reduced, and the weight burden of a manipulator such as a robot apparatus that mounts the coating machine 1 and controls its posture can be reduced, thereby extending its life. be able to.

  In addition, since the male paint connecting portion 21c of the image forming unit 21 connected to the tank body 16 is provided with a check valve 121a, when the image forming unit 21 is replaced by color change or the like, the paint storage is performed. The residual paint in the chamber 21a does not leak to the outside, and the tank body 16 and the like are not contaminated with the residual paint.

Further, in the image forming unit 21 of this example, the extrusion liquid storage chamber 21b is formed without using the cap 31 or the like. Inadvertent leakage of the liquid for extrusion can be reduced.
Further, since the image forming unit 21 itself functions as a paint tank, when the image forming unit 22 is damaged, the image forming unit 21 can be replaced alone, and the replacement operation can be performed quickly and easily. Therefore, the maintenance cost of the coating machine 1 can be reduced.

It is side surface sectional drawing which shows the coating machine provided with the cartridge tank concerning this invention. It is side surface sectional drawing which shows a cartridge tank. It is detail drawing which shows image formation. It is a front view which shows an image forming unit. It is side surface sectional drawing which shows the assembly state of a cartridge tank. It is side surface sectional drawing which shows the state of the recognition pin at the time of normal when the 1st film | membrane and the 2nd film | membrane are not damaged. It is side surface sectional drawing which shows the state of the recognition pin when a failure | damage has arisen in the 1st film | membrane or the 2nd film | membrane. It is side surface sectional drawing which shows 2nd Example of a cartridge tank. It is side surface sectional drawing which shows the assembly state of the cartridge tank of 2nd Example. It is side surface sectional drawing which shows the connection part of the tank main body and image forming unit of the cartridge tank of 2nd Example.

DESCRIPTION OF SYMBOLS 1 Coating machine 11 Cartridge tank 16 Tank main body 16b Communication path 17 Cylinder 17a Paint storage chamber 17b Extrusion liquid storage chamber 21 Image formation unit 22 Image formation 22a First film 22b Second film 22c Gap 23 Base 33 Recognition pin

Claims (2)

A cartridge tank that contains paint and an extruding liquid for delivering the paint to the coating machine, and is detachably attached to the coating machine,
A paint storage chamber in which the paint is stored and an extrusion liquid storage chamber in which the extrusion liquid is stored are defined by image formation composed of a first film and a second film;
Forming a gap between the first film and the second film of the image formation;
Forming a communication path communicating the gap and the outside of the cartridge tank ;
In the communication path, a pin member is slidably fitted,
The pin member protrudes to the outside of the cartridge tank when pressure is applied in the gap between the first film and the second film of the image forming film.
A cartridge tank characterized by that. Contains paint and extrusion liquid for delivering paint to the coating machine;
A paint storage chamber in which the paint is stored and an extrusion liquid storage chamber in which the extrusion liquid is stored are defined by image formation composed of a first film and a second film;
Forming a gap between the first film and the second film of the image formation;
Forming a communication path communicating the gap and the outside of the cartridge tank;
In the communication path, a pin member is slidably fitted,
The pin member has a cartridge tank that protrudes to the outside of the cartridge tank when pressure is applied in the gap between the first film and the second film of the image forming film .
A painting machine that is detachably mounted.

Images