JP2008207121A - Fitting member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting member in which a fluid collected in a void part is surely cleaned up. <P>SOLUTION: A sensor base 32 (the fitting member) for fitting a pressure sensor 33 to a coating feed device 10 is provided with the void part 33a to which a part of the pressure sensor 33 is inserted, a flow-in passage 33e and a flow-out passage 33f which communicate with the void part 33a. The flow-in passage 33e and the flow-out passage 33f are arranged respectively at both ends of the void part 33a and the bottom surface 32c of the void part 32b is conically shaped. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an attachment member for attaching an attachment such as a pressure sensor to a paint supply device capable of collecting paint in a paint tank when changing the paint color in an automobile paint line.

  The paint supply equipment used in automobile paint lines, etc., is a paint tank in which paint of each color is charged, a pump that pumps this paint, and a paint that guides the paint from the paint tank to the paint machine (actually a color change valve unit) As many paint tanks, pumps, and paint pipes as the number of paint colors are installed. And the paint of the coating color according to a vehicle specification is sprayed by switching the color change valve unit provided in the upstream of the coating machine.

  In such a coating material supply apparatus, for example, if an attempt is made to measure the pressure of the coating material using a pressure sensor, it is necessary to use an explosion-proof type device. Generally, the pressure-sensitive surface of an explosion-proof pressure sensor has a diameter larger than the inner diameter of the paint pipe. Therefore, the cross-sectional area of the cavity near the pressure-sensitive surface is larger than the cross-sectional area of the paint pipe, and the flow rate of the paint and cleaning liquid in the cavity is slow, so under the same cleaning conditions as normal paint pipes, The pigment cannot be completely removed from the cavity. For example, when a black paint is applied after applying a metallic paint containing aluminum flakes, aluminum flakes may be mixed into the coated film surface after coating, resulting in a coating film defect. In order to prevent such coating film defects, it is necessary to clean the inside of the cavity many times, and a large amount of cleaning liquid is required and the cleaning time is inefficient.

  In order to reduce such a liquid reservoir portion as much as possible, it has been conventionally known that the hollow portion has a simple cylindrical shape. However, in such a shape, the fluid flows fastest through the shortest path between the inflow path and the outflow path, and the cleaning time differs between the central part and the wall surface side in the hollow part. In some cases, only the surface of the cavity is sufficiently cleaned, and an uncleaned portion remains on the wall surface side of the cavity.

  On the other hand, it has been conventionally known that a plurality of inflow passages communicating with the cavity portion are provided and the inflow passages are arranged at an angle such that a swirling flow of the cleaning liquid is formed in the cavity portion. In addition, there has been conventionally known an outlet that communicates with the cavity portion in the center of the cavity portion so that the cleaning liquid can be easily collected (see, for example, Patent Document 1).

  However, in the former, when the flow velocity along the wall surface of the cavity is increased, there is a drawback that a relatively heavy pigment is moved to the wall surface side by the action of centrifugal separation. In the latter, the cleaning liquid flows in the shortest distance between the inflow path and the outflow path, and there is a drawback that only the cleaning by turbulent flow can be expected in the other portions. In either case, there is a possibility that the inside of the cavity cannot be reliably washed.

JP 05-285424 A

  An object of this invention is to provide the attachment member which can wash | clean the fluid collected in the cavity part reliably.

  In order to achieve the above object, according to the present invention, a mounting member for mounting the mounting object in a state in which a part of the mounting object is in contact with the mounting object through which a fluid can flow. And a hollow portion into which at least a part of the attachment is inserted, and an inflow passage and an outflow passage communicating with the hollow portion, wherein the inflow passage and the outflow passage are provided in the cavity portion. The bottom surface that is disposed at each end and faces the mounting object in the cavity portion has a distance between the exposed surface exposed to the cavity portion in the mounting object and the bottom surface in the radial direction of the bottom surface. An attachment member having a shape that becomes narrower toward the center along the line is provided.

  In the present invention, an inflow path and an outflow path are respectively arranged at both ends of the cavity portion into which a part of the attachment is inserted, and the distance between the exposed surface and the bottom surface of the attachment is along the radial direction. The shape becomes narrower toward the center.

  By narrowing the distance between the bottom surface and the exposed surface in the central part where the distance from the inflow path to the outflow path is short, the flow velocity of the fluid passing through this part can be made relatively slow. On the other hand, since the distance between the bottom surface and the exposed surface is relatively wide on the wall surface side of the hollow portion where the distance from the inflow passage to the outflow passage is long, the flow velocity of the fluid passing through this portion is relatively high. can do. For this reason, it is possible to clean the wall surface side and the central portion in the cavity portion in substantially the same time, and since there is no unwashed portion on the wall surface side of the cavity portion, it is possible to reliably clean the fluid accumulated in the cavity portion. It becomes possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an overall configuration of a paint supply apparatus according to the present embodiment, FIG. 2 is a cross-sectional view showing a receiving pig station of the paint supply apparatus according to the present embodiment, and FIGS. 3A and 3B are views in the present embodiment. FIG. 4 is a sectional view showing a sensor base according to another embodiment of the present invention, FIG. 5 is a sectional view showing a sensor base according to still another embodiment of the present invention, and FIGS. The figure which shows the pig which concerns on embodiment, FIG. 7 is sectional drawing which shows the feed side pig station of the coating material supply apparatus which concerns on this embodiment, FIG. 8 is a schematic plan view which shows the coating system which concerns on this embodiment.

  As shown in FIG. 1, the coating material supply apparatus 10 according to the first embodiment of the present invention uses a lot of coating materials to be supplied to a coating gun 2 composed of, for example, an air atomizing coating machine or a rotary atomizing coating machine. A main color change valve unit 20 (hereinafter referred to as a main CCV 20) for selecting from among various types of paint is provided, and the paint supplied from the main CCV 20 is guided to the paint gun 2. .

  The main CCV 20 includes a manifold 21 and a plurality of first three-way valves 22, and a first port of each first three-way valve 22 is connected to the manifold 21. A second port of each three-way valve 22 is connected to a receiving pig station 30 (described later) so that paint is supplied. Moreover, the 3rd port of each three-way valve 22 is connected to the 1st dump valve 23 for releasing a pressure or performing waste liquid. In the main CCV 20, by selecting one of the plurality of first three-way valves 22, the paint is supplied into the manifold 21, and further, by opening a trigger valve (not shown) in the paint gun 2, The paint is discharged to the object to be coated. Each of the first three-way valves 22 opens and closes based on a control signal from a control device (not shown).

  In FIG. 1, only one first three-way valve 22 is shown, and the three-way valve 22 will be described in detail below as a representative of a plurality of first three-way valves. Incidentally, components other than the illustrated first three-way valve 22 may be configured in the same manner as the first three-way valve 22, or the main supply pipe may be directly connected from the paint tank.

  As shown in FIG. 1, the first three-way valve 22 is received via a paint hose so that the first port communicates with an outflow path 32f (see FIG. 2) formed in the first sensor base 32. Connected to the first sensor base 32 of the side pig station 30.

  As shown in FIG. 2, the first sensor base 32 is fixed to the station main body 31 of the receiving pig station 30, and the first pressure sensor 33 is attached to the first sensor base 32. .

  The first pressure sensor 33 has a substantially cylindrical shape, and as shown in FIGS. 2 and 3A, a pressure-sensitive surface 33a for measuring pressure is provided on the upper surface, and the first pressure sensor In order to fix 33 to the first sensor base 32, a male screw portion 33b that can be screwed with the female screw portion 32d of the first sensor base 32 is formed in the lower portion of the side surface.

  As shown in FIG. 1, the first pressure sensor 33 is connected to the determination device 70 via a cable so that the detection result can be transmitted. The determination device 70 includes a CPU and the like, and can determine the position of the pig 90 based on the detection results of the first and second pressure sensors 33 and 44. A specific determination method by the determination device 70 will be described later. The position of the pig 90 determined by the determination device 70 is displayed on the notification device 80 including a monitor or the like. Further, the notification device 80 notifies the trouble information such that the pig 90 does not exist at the predetermined position.

  As shown in FIGS. 3A and 3B, the first sensor base 32 communicates with the base body 32a through which a part of the first pressure sensor 33 can be inserted, and with the cavity 32b. An inflow path 32e and an outflow path 32f are formed and configured. The cavity 32b has a cylindrical shape into which the first pressure sensor 33 can be inserted. When the first pressure sensor 33 is attached to the first sensor base 32, the pressure-sensitive surface 33a is placed in the cavity 32b. Facing it, it faces the bottom surface 32c of the cavity 32a. The bottom surface 32c has a conical shape protruding toward the first pressure sensor 33 side. Further, a female screw portion 32d that can be screwed with the male screw portion 33b of the first pressure sensor 33 is formed on the side wall surface of the cavity portion 32b.

  As described above, in the present embodiment, when the first pressure sensor 33 has the flat pressure-sensitive surface 33a, the bottom surface 32c of the cavity portion 32b is formed into a conical shape. The distance between the pressure-sensitive surface 33a is narrowed and the flow rate of the cleaning liquid (reference numeral L2 in FIG. 3B) passing through this portion is relatively slow, whereas the bottom surface 32c and the pressure-sensitive surface 33a are formed on the wall surface side of the cavity 32b. Is relatively wide, and the flow rate of the cleaning liquid passing through this portion (reference numeral L1 in FIG. 3B) is relatively high. The part can be cleaned in approximately the same time. For this reason, since there is no unwashed portion on the wall surface side of the cavity portion 32b, the paint accumulated in the cavity portion 32b can be reliably washed.

  The conical surface of the bottom surface 32c is inclined at an inclination angle α with respect to the pressure-sensitive surface 33a of the first pressure sensor 33, and the inclination angle α is preferably 2 ° ≦ α ≦ 30 °. When the inclination angle α is less than 2 ° (α <2 °), the conical shape is almost a flat surface, and the distance between the bottom surface 32c and the pressure-sensitive surface 33a is sufficient in the central portion of the cavity portion 32b. In other words, an unwashed portion is generated on the wall surface side of the cavity 32b. On the other hand, when the inclination angle α is larger than 30 ° (α> 30 °), the conical shape is reduced and the volume of the cavity 32b is increased, so that the remaining amount of paint and the amount of cleaning liquid used are increased. This inclination angle α can be appropriately set according to characteristics such as the viscosity of the paint flowing in the hollow portion 32b. In addition, it is preferable that the top of the bottom surface 32c and the circumferential end have an appropriate roundness in order to improve detergency.

  An inflow path 32e and an outflow path 32f are opened at both ends of the cavity 32b. The inflow path 32 e communicates with a first sub-passage 31 b formed inside the station body 31. The outflow path 32f is connected to the second port of the first three-way valve 22 of the main CCV 20 via a paint hose. The opening positions of the inflow path 32e and the outflow path 32f in the cavity portion 32b may be at both ends of the bottom surface 32c, or may be on the side wall surface of the cavity portion 32b. Further, when the inflow passage 32e and the outflow passage 32f are opened at both ends of the bottom surface 32c, it is not limited to the circumferential end portion of the bottom surface 32c, and may be slightly deviated from the circumferential end portion of the bottom surface 32c toward the center side. good. Furthermore, the incident angle to the cavity 32b of the inflow path 32e is preferably an angle substantially orthogonal to the pressure-sensitive surface 33a, but may be an angle inclined to the pressure-sensitive surface 33a. When the incident angle of the inflow path 32e is inclined, it is preferable to set the incident axis of the inflow path so as to intersect the central axis of the pressure-sensitive surface 33a, thereby generating a swirling flow in the cavity 32b. Can be prevented. Similarly, the outflow path 32f is preferably at an angle substantially orthogonal to the pressure-sensitive surface 33a, but may be an angle inclined with respect to the pressure-sensitive surface 33a.

  In the present invention, the bottom surface 32c of the cavity portion 32b is not limited to a convex conical shape, and the distance between the bottom surface 32c and the pressure sensitive surface 33a is the center along the radial direction of the cavity portion 32b. It is only necessary that the bottom surface 32c has a shape that becomes narrower toward the bottom. For example, when the pressure-sensitive surface 33a of the first pressure sensor 33 has a conical shape that protrudes toward the bottom surface 32c of the hollow portion 32b, the hollow portion 32b according to the apex angle of the conical shape. As shown in FIG. 4, the bottom surface 32c has a concave conical shape, or a convex conical shape as shown in FIG. 5, and the distance between the bottom surface 32b and the pressure-sensitive surface 33a in the central portion of the cavity portion 32b is set. It may be narrowed.

  Returning to FIG. 2, the first sub-passage 31 b of the station main body 31 branches from a main passage 31 a formed in the station main body 31. At one end of the main passage 31a, one end of the paint hose 50 into which the pig 90 is inserted so as to be able to reciprocate is fixed by a cap 31c, and the inner hole of the paint hose 50 and the station body 31 main passages 31a communicate with each other.

  Here, as shown in FIG. 6A and FIG. 6B, the pig 90 according to the present embodiment has a substantially cylindrical shape in which the diameters at two locations near both ends are expanded, and the pig receivers of the pig stations 30 and 40 to be described later. It has the 1st seal part 91 which contact | abuts to surface 34b, 462b and seals 2nd sub channel | path 34a, 462c, and the 2nd seal part 92 closely_contact | adhered to the inner wall face of the paint hose 50.

  The first seal portion 91 is composed of both end surfaces of the pig 90, and the circular edge portions thereof are in close contact with the pig receiving surfaces 34b and 462b so as to block the second sub passages 34a and 462c. It has become.

  The second seal portion 92 is configured from a portion whose diameter is increased in the pig 90. The outer shape D1 of the second seal portion 92 is substantially the same as the inner diameter D2 (see FIG. 2) of the paint hose 50 (D1 = D2), and the pig 90 moves in the paint hose 50. The second seal portion 92 scrapes off the paint remaining in the paint hose 50.

  By providing the first seal portion 91 and the second seal portion 92 at different portions in the pig 90, the wear of the seal portions 91 and 92 can be delayed to extend the life of the pig 90.

  As shown in FIG. 2, the main passage 31a of the station body 31 has an inner diameter D3 that is relatively larger than the outer diameter D1 of the pig 90 (D3> D1), and holds the pig 90 in the main passage 31a. In this state, the fluid can be circulated in the main passage 31a.

  A manifold 34 is fixed to the other end of the station main body 31, and a main passage 31 a of the station main body 31 communicates with a second sub passage 34 a formed in the manifold 34. As shown in FIG. 2, the inner diameter D4 of the second sub-passage 34a is relatively smaller than the inner diameter D3 of the main passage 31a (D4 <D3) and relatively smaller than the outer diameter D1 of the pig 90. (D4 <D1). For this reason, the pig receiving surface 34b for the pig 90 which has moved to the receiving side pig station 30 through the paint hose 50 to come into contact and stop is formed by the end surface of the manifold 34 on the station main body 31 side. In the present embodiment, the pig receiving surface 34b has a concave spherical shape formed around the opening of the second sub-passage 34a.

  Since the pig receiving surface 34b has a spherical shape and the first seal portion 91 of the pig 90 has a circular edge portion, the second sub-side is provided regardless of the contact angle of the pig 90 with respect to the pig receiving surface 34b. It is possible to reliably block the passage 34a. As a result, in this embodiment, since the pressure accurately fluctuates in the piping system, it is possible to detect the pig position using an explosion-proof pressure sensor instead of the conventional pig position detection using the magnet embedded in the pig. In addition, the cost of the paint supply device can be reduced, and the device structure can be simplified.

  As shown in FIG. 1, a manifold 34 fixed to the other end of the station main body 31 has a first cleaning liquid supply valve 35a capable of supplying a cleaning liquid and a second air supply capable of supplying pressurized air. A valve 35b and a second dump valve 35c for discharging the liquid outside are provided. Each of the valves 35a to 35c can be opened and closed by a control signal from a control device (not shown).

  As shown in FIG. 7, one end of the station main body 41 of the feed-side pig station 40 is fixed to the other end of the paint hose 50 by a cap 41d. A main passage 41a formed in the main body 41 communicates. The main passage 41a has an inner diameter D5 that is relatively larger than the outer diameter D1 of the pig 90 (D5> D1), and the main passage 41a is held in the main passage 41a with the pig 90 held in the main passage 41a. The fluid can be circulated.

  As shown in FIG. 7, a second sensor base 43 is fixed to the station main body 41, and a second pressure sensor 44 is attached to the second sensor base 43.

  Similar to the first pressure sensor 33, the second pressure sensor 44 has a substantially cylindrical shape as shown in FIG. 7, and a pressure-sensitive surface 44a for measuring pressure is provided on the lower surface. In addition, in order to fix the second pressure sensor 44 to the second sensor base 43, a male screw portion that can be screwed with the female screw portion 43d of the second sensor base 43 is formed in the lower portion of the side surface. Similar to the first pressure sensor 33, the second pressure sensor 44 is connected to the determination device 70 via a cable so that the detection result can be transmitted.

  Similarly to the first sensor base 32, the second sensor base 43 communicates with the base body 43a, a cavity 43b into which a part of the second pressure sensor 44 can be inserted, and the cavity 43b. An inflow path 43e and an outflow path 43f are formed (see FIGS. 3A and 3B). The hollow portion 43b has a cylindrical shape into which the second pressure sensor 44 can be inserted. When the second pressure sensor 44 is attached to the second sensor base 43, the pressure-sensitive surface 44a is placed in the hollow portion 43b. Facing it, it faces the bottom surface 43c of the cavity 43b. The bottom surface 43c has a conical shape protruding toward the second pressure sensor 43 side. A female screw portion 43d that can be screwed with the male screw portion 44b of the second pressure sensor 44 is formed on the upper portion of the side wall surface of the hollow portion 43b. The conical surface of the bottom surface 43c is inclined at an inclination angle α with respect to the pressure-sensitive surface 44a of the second pressure sensor 44, and the inclination angle α is preferably 2 ° ≦ α ≦ 30 °.

  As described above, in the present embodiment, when the first pressure sensor 44 has the flat pressure-sensitive surface 43a, the bottom surface 43c of the cavity portion 43b is formed into a conical shape. While the distance between the pressure-sensitive surface 44a is narrowed and the flow rate of the cleaning liquid (reference numeral L1 in FIG. 3B) passing through this portion is slow, the space between the bottom surface 43c and the pressure-sensitive surface 44a on the wall surface side of the cavity 43b. Is relatively wide, and the flow rate of the cleaning liquid (reference numeral L2 in FIG. 3B) passing through this portion becomes relatively high. It can be cleaned in about the same time. For this reason, since there is no unwashed portion on the wall surface side of the cavity 43b, the paint accumulated in the cavity 43b can be reliably washed.

  An inflow passage 43e and an outflow passage 43f are open at both ends of the hollow portion 43b. As shown in FIG. 7, the outflow passage 43e communicates with the first sub passage 41b branched from the main passage 41a. As shown in FIG. 1, the outflow passage 43 f is connected to a passage 43 a of the second sensor base 43 with a third dump valve 45 for waste liquid outside.

  Returning to FIG. 7, in this embodiment, a stopper 42 made of, for example, an air cylinder is fixed to the station main body 41, and the stopper pin 42 a is inserted through a through hole 41 c formed on the side surface of the station main body 41. Can be moved forward and backward in the main passage 41a. When the stopper pin 42a advances into the main passage 41a, the movement of the pig 90 is blocked, and when the stopper pin 42a moves out of the main passage 41a, the movement of the pig 90 becomes possible. .

  An attachment / detachment portion 46 for taking out the pig 90 from the sending-side pig station 40 is fixed to the other end portion of the station main body 41. As shown in FIG. 7, the attaching / detaching portion 46 is fixed to the first attaching / detaching member 461 fixed to the station main body 41 and the end portion of the sub color change valve unit 47 (hereinafter referred to as sub CCV 47). The second detachable member 462 and a clamp 463 for connecting the first detachable member 461 and the second detachable member 462 are configured.

  The first detachable member 461 has a substantially disk shape having a flange portion 461a, and a passage 461b having the same inner diameter D5 as the main passage 41a of the station main body 41 is formed at the center thereof. The first detachable member 46a is fixed to the station body 41 so that the main passage 41a and the passage 461b communicate with each other.

  Similarly, the second detachable member 462 has a substantially disk shape having a flange portion 462a, and a second sub passage 462c is formed at the center thereof. The inner diameter D6 of the second sub-passage 462c is relatively smaller than the inner diameter D5 of the main passage 41a (D6 <D5) and relatively smaller than the outer diameter D1 of the pig 90 (D6 < D1). For this reason, the pig receiving surface 462b for the pig 90 that has moved to the feeding-side pig station 40 through the paint hose 50 to come into contact and stop is opposed to the first attaching / detaching member 461 in the second attaching / detaching member 462. It is comprised by the end surface. In the present embodiment, the pig receiving surface 462b has a concave spherical shape formed around the opening of the second auxiliary passage 462c, similarly to the above-described pig receiving surface 34b.

  The pig receiving surface 462b has a spherical shape, and the first seal portion 91 of the pig 90 has a circular edge, so that the second auxiliary sub-portion 462b is independent of the contact angle of the pig 90 with respect to the pig receiving surface 462b. It is possible to securely block the passage 462c. As a result, in this embodiment, since the pressure accurately fluctuates in the piping system, it is possible to detect the pig position using an explosion-proof pressure sensor instead of the conventional pig position detection using the magnet embedded in the pig. In addition, the cost of the paint supply device can be reduced, and the device structure can be simplified.

  The first attaching / detaching member 461 and the second attaching / detaching member 462 are configured so that the positioning pins of the second attaching / detaching member 462 are inserted into the positioning holes of the first attaching / detaching member 461 and are in close contact with each other. By sandwiching the portions 461a and 462a with the clamp 463, they are detachably connected. Note that, in the connected state, the passage 461b of the first attachment / detachment member 461 and the second sub passage 462b of the second attachment / detachment member 462 communicate with each other, and the passage of the first attachment / detachment member 461 The pig receiving surface 462b formed on the second detachable member 462 is located at the end point of 461b.

  As shown in FIG. 1, the sub-CCV 47 includes a manifold 48 fixed to the detachable portion 46 and first to fifth switching valves 49a to 49e to which paint is supplied from a paint tank. By selecting one of the switching valves 49a to 49e, the paint is supplied to the passage 48a formed in the manifold 48. Further, as shown in FIG. 7, the passage 48 a communicates with the second sub passage 462 c of the attaching / detaching portion 46 so that the paint is supplied from the sub CCV 47 to the main passage 41 a via the attaching / detaching portion 46. It has become.

  Returning to FIG. 1, the sub-CCV 47 includes a second cleaning liquid supply valve 49f capable of supplying a cleaning liquid, a second air supply valve 49g capable of supplying pressurized air, and a fourth for waste liquid to the outside. And a dump valve 49h. Each of the valves 49a to 49h can be opened and closed by a control signal from a control device (not shown).

  The paint 61b supplied to the first to fifth switching valves 49a to 49e is housed in a sealed paint tank 61, respectively. Each paint tank 61 is connected to the first port of the second three-way valve 61a. Pressurized air is supplied to the second port of the second three-way valve 61a, and the pressurized air is released through the third port of the second three-way valve 61a. Is possible. By closing the third port, pressurized air is supplied from the second port to the sealed paint tank 61 so that the paint is pumped from the first port toward the first switching valve 49a. It has become. On the other hand, by opening the third port, the pressurized air supplied from the second port is released, and the paint can be collected from the paint hose 50 toward the paint tank 61. . In FIG. 1, the paint tank 61 and the second three-way valve 61a are connected only to the first switching valve 49a, but actually, the paint is also applied to the second to fifth switching valves 49b to 49e. A tank 61 and a second three-way valve 61a are connected.

  As shown in FIG. 8, the coating material supply apparatus 10 configured as described above is provided, for example, for each of the plurality of coating robots 4 provided in the coating booth B to form a coating system. A coating gun 2 is provided as an end effector at the tip of the coating robot 4, and each color paint can be supplied to the paint gun 2 from the paint supply device 10.

  In the present invention, the present invention is not limited to the coating system as described above. For example, one paint supply device 10 may be assigned to a plurality of painting robots 4.

  Below, the coating material collection | recovery method which concerns on this embodiment is demonstrated according to the color change procedure of the coating material supply apparatus 10. FIG.

  FIG. 9 is a flowchart showing the paint recovery method in the present embodiment, FIGS. 10A to 10F are block diagrams showing the paint supply apparatus in each step shown in FIG. 9, and FIGS. 11A and 11B are received by the pig in the pig station. It is a figure which shows the state contact | abutted to the surface.

  First, as shown in FIG. 10A, a state (step S10 in FIG. 9) in which the paint supply device 10 is supplying the paint of the previous color (the paint 61b contained in the paint tank 61) to the paint gun 2 will be described. . In the initial state, the pig 90 is positioned in the feeding-side pig station 40, the stopper pin 42a of the stopper 42 is retracted from the main passage 41a, and all the valves are closed. In such a state, since the third port of the second three-way valve 61a is closed, air is introduced into the paint tank 61 through the second port of the second three-way valve 61a. The inside of the paint tank 61 is pressurized. Here, when the first switching valve 49a of the sub CCV 47 is opened and the second dump valve 35c is opened, the paint in the paint tank 61 is transferred from the passage 48a of the manifold 48 to the second of the second detachable member 462. The sub-passage 462c → the passage 461b of the first attachment / detachment member 461 → the main passage 41a of the station body 41 → the paint hose 50 is reached to the receiving pig station 30. During this time, the pig 90 is pressure-fed from the feeding-side pig station 40 to the receiving-side pig station 30 via the paint hose 50, and stops when it abuts on the pig-receiving surface 34b of the receiving-side pig station 30. By contact between the first seal portion 91 of the pig 90 and the pig receiving surface 34b, as shown in FIG. 11A, the second sub-passage 34a is blocked, and the flow path to the second dump valve 35c is automatically set. Is blocked. In the present embodiment, the pig receiving surface 34b has a spherical shape, and the first seal portion 91 of the pig 90 has a circular edge. Therefore, as shown in FIG. Even when the pig 90 abuts obliquely against the receiving surface 34b, the second sub-passage 34a can be reliably sealed.

  At this time, the determination device 70 compares the pressure P <b> 1 measured by the first pressure sensor 33 with the pressure P <b> 2 measured by the second pressure sensor 44. When these pressures P1 and P2 are substantially the same (P1 = P2), the determination device 70 determines that the pig 90 has moved to the receiving pig station 30.

  On the other hand, when the predetermined time has passed with the pressures P1 and P2 being not identical (P1 ≠ P2), the determination device 70 determines that the pig 90 has not moved to the receiving pig station 30. The notification device 80 notifies the defect information.

  When it is detected that the pig 90 has moved to the receiving pig station 30, the first dump valve 23 is opened for a predetermined time. By this opening, the paint reaching the main passage 31a of the station body 31 reaches the second port of the first three-way valve 22 of the main CCV 20 through the outflow path 32f in the first sensor base 32 → the paint hose → the paint CC. Is filled into the first three-way valve 22 and the preparation for painting is completed. When the paint stored in the paint tank 61 needs to be painted, the first three-way valve 22 is opened and the paint is supplied to the painting gun 2.

  When the painting operation is completed and a different paint is applied, the color changing operation of the paint supply device 10 is performed according to the following procedure.

  First, as shown in step S <b> 20 of FIG. 9, the paint that has been applied is collected in the paint tank 61. Based on the signal indicating the completion of the coating of the previous color paint, the second dump valve 35c is closed, the third port of the second three-way valve 61a is opened, and the pressurization in the paint tank 61 is released. Then, the first cleaning liquid supply valve 35 a or the first air supply valve 35 b of the receiving side pig station 30 is opened, and the cleaning liquid or pressurized air is supplied to be located in the receiving side pig station 30. The pig 90 is pushed back to the feeding side pig station 40, and the paint filled in the paint hose 50 is collected in the paint tank 61. The pig 90 stops by coming into contact with the pig receiving surface 462b of the feeding-side pig station 40. The second sub-passage 462c is blocked by the contact between the first seal portion 91 of the pig 90 and the pig receiving surface 462b, and the flow path to the sub CCV 47 is automatically shut off.

  At this time, the determination device compares the pressure P <b> 1 measured by the first pressure sensor 33 with the pressure P <b> 2 measured by the second pressure sensor 44. When these pressures P1 and P2 are substantially the same (P1 = P2), the determination device 70 determines that the pig 90 has moved to the feeding-side pig station 40, and the notification device 80 monitors, for example. Etc., the position of the pig 90 is displayed.

  On the other hand, when the predetermined time has elapsed with the pressures P1 and P2 being not identical (P1 ≠ P2), the determination device 70 determines that the pig 90 has not moved to the feeding-side pig station 40. The notification device 80 notifies the defect information via a monitor or the like.

  As the cleaning liquid supplied via the first cleaning liquid supply valve 35a, thinner can be used when the paint is an organic solvent-based paint, and water is used when the paint is a water-based paint. be able to. Further, when the paint is a water-based paint, the first air supply valve 35b may be omitted.

  When it is detected that the pig 90 has moved to the feeding-side pig station 40, as shown in FIG. 10B, the third dump valve 45 is opened and the first cleaning liquid supply valve 35a or the first air supply valve 35b is opened. Is opened (step S30 in FIG. 9). Accordingly, the second sub passage 34a in the manifold 34 → the main passage 31a in the station main body 31 → the paint hose 50 → the main passage 41a in the station main body 41 → the inflow passage 43e in the second sensor base 43 → the cavity portion. The path from 43b to the outflow path 43f is cleaned.

  At the time of cleaning in step S30, in this embodiment, the bottom surface 43c of the cavity 43b has a conical shape, and the distance between the bottom surface 43c and the pressure-sensitive surface 44a is narrow at the center of the cavity 43b. The paint accumulated in the cavity 43b is reliably washed.

  In addition, since the pig 90 is held in the main passage 31a of the station main body 41 at the time of this step S30, the tip portion on the pig station 40 side in the pig 90 is washed. In addition, since the cleaning liquid or air also passes through the inflow path 43e, the cavity 43b, and the outflow path 43f of the second sensor base 43, the pressure-sensitive surface 44a of the second pressure sensor 44 is cleaned.

  Next, as shown in FIG. 10C, the stopper 42 is operated to move the stopper pin 42a into the main passage 41a, and the first cleaning liquid supply valve 35a and the first air supply valve 35b are closed, In this state, the second cleaning liquid supply valve 49f and the second air supply valve 49g are alternately opened (step S40 in FIG. 9). Accordingly, the passage 48a of the manifold 48 of the sub CCV 47 → the second sub passage 462c of the second attaching / detaching member 462 → the passage 461b of the first attaching / detaching member 461 → the main passage 41a of the station main body 41 → the second sensor base 43. The path extending from the inflow path 43e to the cavity 43b to the outflow path 43f is cleaned with the cleaning liquid and air. Further, at the time of this step S40, since the movement of the pig 90 to the receiving-side pig station 30 side is restricted by the stopper 42, the rear end portion of the pig 90 is washed.

  As the cleaning liquid supplied through the second cleaning liquid supply valve 49f, thinner can be used when the paint is an organic solvent-based paint, and water is used when the paint is a water-based paint. be able to. Further, when the paint is a water-based paint, the first air supply valve 49g may be omitted.

  Next, as shown in FIG. 10D, the third dump valve 45 is closed and the first dump valve 23 is opened. In this state, the second cleaning liquid supply valve 49f and the second air supply valve 49g are opened. Are alternately opened (step S50 in FIG. 9). Thereby, the passage 48a of the manifold 48 of the sub CCV 47 → the second auxiliary passage 462c of the second attaching / detaching member 462 → the passage 461b of the first attaching / detaching member 461 → the main passage 41a of the station main body 41 → the paint hose 50 → the station main body. The flow path from the main passage 31 a of 31 to the inflow path 32 e of the first sensor base 33 → the cavity 32 b → the outflow path 32 f → the first three-way valve 21 is washed.

  At this time, the pig 90 is held in the main passage 41a of the feeding-side pig station 40 by the stopper 42, and its outer diameter D1 is relatively larger than the inner diameter D5 of the main passage 41a. Since the cleaning liquid and air pass through the periphery of the pipe 90, the pig 90 is more reliably cleaned.

  Further, at the time of cleaning in step S50, in this embodiment, the bottom surface 32c of the cavity portion 32b has a conical shape, and the distance between the bottom surface 32c and the pressure-sensitive surface 33a is narrowed at the central portion of the cavity portion 32b. Therefore, the paint accumulated in the cavity 32b is reliably washed.

  Next, as shown in FIG. 10E, the first dump valve 23 is closed and the second dump valve 35c is opened. In this state, the second cleaning liquid supply valve 49f and the second air supply valve 49g Are alternately opened (step S60 in FIG. 9). Thereby, the passage 48a of the manifold 48 of the sub CCV 47 → the second auxiliary passage 462c of the second attaching / detaching member 462 → the passage 461b of the first attaching / detaching member 461 → the main passage 41a of the station main body 41 → the paint hose 50 → the station main body. The path from the main passage 31a of 31 to the second sub-passage 34a of the manifold 3 is cleaned.

  Next, as shown in FIG. 10F, the second dump valve 35c, the second cleaning liquid supply valve 49f, and the second air supply valve 49g are closed, and the fourth dump valve 49h and the first air supply are closed. The valve 35b is opened (step S70 in FIG. 9). As a result, the pig 90 regulated by the stopper 42 moves toward the pig receiving surface 462b of the feeding-side pig station 40. Next, the fourth dump valve 49h and the first air supply valve 35b are closed, and the stopper pin 42a is retracted from the main passage 41a, whereby the paint supply device 10 is returned to the initial state.

  The color change operation is completed through the above steps S20 to S70, and the paint supply device 10 can be filled with the next color paint.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, in the above-described embodiment, the example in which the present invention is applied to the sensor base for attaching the pressure sensor to the paint supply device has been described. However, the present invention is not particularly limited thereto, and a cartridge type paint tank or the like is used. You may apply to the attachment member for attaching to a coating material supply apparatus, In this case, the extrusion surface of the piston which can reciprocate the coating material tank will face in the cavity part of an attachment member. Moreover, you may apply this invention to the intermediate | middle storage tank described in said patent document 1. FIG.

FIG. 1 is a block diagram showing the overall configuration of a paint supply apparatus according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a receiving pig station of the paint supply apparatus according to the embodiment of the present invention. FIG. 3A is a cross-sectional view showing a sensor base in the embodiment of the present invention. 3B is a cross-sectional view taken along line IIIB-IIIB in FIG. 3A. FIG. 4 is a partial cross-sectional view showing a sensor base according to another embodiment of the present invention. FIG. 5 is a partial cross-sectional view showing a sensor base according to still another embodiment of the present invention. FIG. 6A is a side view showing a pig according to the embodiment of the present invention. FIG. 6B is a front view showing a pig according to the embodiment of the present invention. FIG. 7 is a cross-sectional view showing a feed-side pig station of the paint supply apparatus according to the embodiment of the present invention. FIG. 8 is a schematic plan view showing a coating system according to an embodiment of the present invention. FIG. 9 is a flowchart showing the paint recovery method in the embodiment of the present invention. FIG. 10A is a block diagram illustrating the paint supply apparatus in a state where a front color paint is being applied (painting step). FIG. 10B is a block diagram illustrating the paint supply apparatus in a state where the interior of the paint supply apparatus is cleaned (collection step and first cleaning step) after the previous color paint is recovered. FIG. 10C is a block diagram illustrating the paint supply device in a state where the inside of the paint supply device is being cleaned (second cleaning step). FIG. 10D is a block diagram illustrating the paint supply apparatus in a state where the interior of the paint supply apparatus is cleaned (third cleaning step). FIG. 10E is a block diagram illustrating the paint supply device in a state where the inside of the paint supply device is being cleaned (fourth cleaning step). FIG. 10F is a block diagram illustrating the paint supply apparatus in a state where the pig is returned to the origin position (return step). FIG. 11A is a schematic view showing a state where the pig is in contact with the receiving surface in the pig station. FIG. 11B is a schematic cross-sectional view showing a state where the pig is in contact with the receiving surface obliquely in the pig station.

Explanation of symbols

10 ... Paint recovery device 20 ... Main CCV
DESCRIPTION OF SYMBOLS 30 ... Reception side pig station 31 ... Station main body 31a ... Main passage 31b ... 1st subpassage 32 ... 1st sensor base 32a ... Base main body 32b ... Cavity part 32c ... Bottom surface 32d ... Female thread part 32e ... Inflow path 32f ... Outlet passage 33 ... first pressure sensor 33a ... pressure-sensitive surface 34 ... manifold 34a ... second sub-passage 34b ... pig receiving surface 40 ... feed-side pig station 41 ... station main body 41a ... main passage 41b ... first sub-passage 42 ... Stopper 43 ... Second sensor base 44 ... Second pressure sensor 46 ... Removable part 462b ... Pig receiving surface 462c ... Second sub passage 47 ... Sub CCV
50 ... Paint hose 61 ... Paint tank 61a ... Second three-way valve 90 ... Pig

Claims (6)

An attachment member for attaching the attached object in a state in which a part of the attached object is in contact with the fluid to an attached object through which a fluid can flow.
A cavity into which at least a part of the attachment is inserted;
An inflow path and an outflow path communicating with the cavity,
The inflow path and the outflow path are respectively disposed at both ends of the hollow portion,
The bottom surface of the cavity facing the attachment is narrower as the distance between the exposed surface exposed to the cavity and the bottom of the attachment is closer to the center along the radial direction of the bottom. A mounting member having a shape.   The attachment member according to claim 1, wherein the bottom surface of the hollow portion has a shape in which a distance between the exposed surface of the attachment and the bottom surface continuously narrows toward a center along a radial direction of the bottom surface. . A part of the attachment to be inserted into the hollow portion has a cylindrical shape,
The attachment member according to claim 1 or 2, wherein the hollow portion has a circular cross section along a direction orthogonal to an insertion direction of the attachment so that the attachment can be inserted. The exposed surface of the attachment has a substantially smooth plane;
The attachment member according to claim 3, wherein a bottom surface of the hollow portion has a conical shape.   The mounting member according to any one of claims 1 to 4, wherein a bottom surface of the hollow portion is substantially inclined at 2 ° to 30 ° with respect to an exposed surface of the wearing object. The fluid is a paint or a cleaning liquid,
The mounted object is a paint supply device capable of supplying paint to a coating machine and collecting the paint.
The wearing object is a pressure measuring means for measuring the pressure of the paint in the paint supply apparatus,
The mounting member according to any one of claims 1 to 5, wherein an exposed surface exposed to the hollow portion in the attachment is a pressure-sensitive surface of the pressure means.

Images