JP2006239581A - Powder coating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder coating apparatus capable of shortening the color changing time. <P>SOLUTION: The powder coating apparatus is provided with an elevating apparatus 3 for inserting or pulling a suction nozzle 12 of a suction tube 11 of a coating material supply apparatus 10 into and out of a coating material tank 2 and an air cleaning nozzle 20 connected to the suction nozzle 12 for cleaning the inside of the suction tube 11 by air current. The air cleaning nozzle 20 is installed in a manner that the nozzle 20 can reciprocate between a cleaning preparatory position on the opposite to the suction nozzle 12 and a waiting position at which the nozzle is evacuated from the installation space of the coating material tank 2 to make the air cleaning nozzle 20 move to the cleaning preparatory position following the movement in the carrying-out direction of the coating material tank 2 and move to the waiting position following the movement in the carrying-in direction of the coating material tank 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a powder coating apparatus.

  In powder coating, when changing colors, it is necessary to clean the inside of pipelines of paint supply devices such as suction pipes and injectors to prevent the previous color from being mixed with the subsequent color. For this reason, conventionally, there has been a powder coating apparatus that cleans a suction tube or the like by air blow or air suction in order to facilitate color change of powder coating.

  For example, the powder coating apparatus disclosed in Patent Document 1 is provided with a lift for placing a paint tank on a frame for taking in and out the paint supply apparatus, and a purge nozzle for air blowing the inside of the suction pipe of the paint supply apparatus on the upper surface of the lift. is there.

  In the powder coating apparatus of Patent Document 1, the lifting lift is lowered to remove the suction pipe from the painting tank, the coating tank is lowered from the lifting lift, and then the empty lifting lift is raised to raise the purge nozzle and the suction pipe suction nozzle. Are connected, and the inside of the suction pipe is blown to clean the paint supply device and the paint gun communicating therewith.

JP-A-9-150105

  However, in the powder coating apparatus of Patent Document 1, a purge nozzle that blows air in the suction pipe of the paint supply apparatus is provided on the upper surface of the lift. For this reason, in the powder coating apparatus of Patent Document 1, in order to place the coating tank on the lift lift after the cleaning of the paint supply apparatus is completed, if the lift lift is lowered again and the lift lift is not raised again, the suction nozzle Cannot be put into the paint tank, and it takes time to change colors.

  Accordingly, an object of the present invention is to provide a powder coating apparatus capable of shortening the color change time.

  In order to solve the above-described problems, the present invention provides an elevating device that inserts and removes a suction nozzle of a suction pipe of a paint supply device into a paint tank, and an air cleaning that is connected to the suction nozzle and cleans the inside of the suction pipe by an air flow. In the powder coating apparatus comprising a nozzle, the air cleaning nozzle is provided in a reciprocating manner between a cleaning preparation position facing the suction nozzle and a standby position for retracting from a paint tank installation space, and the air The cleaning nozzle is moved to the cleaning preparation position following the movement of the paint tank in the carrying-out direction, and moved to the standby position following the movement of the paint tank in the carrying-in direction.

  According to the configuration of the present invention, the air cleaning nozzle is provided so as to reciprocate between a cleaning preparation position facing the suction nozzle and a standby position retracted from the paint tank installation space, and the air cleaning nozzle The paint tank is moved to the cleaning preparation position following the unloading direction movement of the paint tank, and moved to the standby position following the movement of the paint tank loading direction. Retraction from the paint tank installation space is performed simultaneously with the carry-in / out movement of the paint tank. That is, unlike the conventional example, there is no process for retracting the air cleaning nozzle from the paint tank installation space before the paint tank is carried in. Accordingly, the powder coating apparatus according to the present invention can shorten the color change time.

  In the configuration of the present invention, the air flow for cleaning the inside of the suction pipe may be either blow or suction. The mechanism for reciprocating the air cleaning nozzle between the cleaning preparation position and the standby position is not particularly limited. However, the running cost increases when the electric mechanism is used.

  Therefore, an urging means for moving the air cleaning nozzle from the standby position to the cleaning preparation position is provided, and the urging means accumulates an urging force by moving the paint tank in the loading direction, and by moving the paint tank in the unloading direction. It is preferable to employ a configuration that releases the biasing force. According to this configuration, the energizing force of the paint tank can be used for the reciprocating movement of the air cleaning nozzle by the urging means. For this reason, according to this structure, the increase in running cost is prevented.

  The urging means can be composed of an elastic member such as a spring that is compressed by movement of the paint tank in the loading direction.

  Preferably, a swing mechanism that swingably supports the air cleaning nozzle between a standby position and a cleaning preparation position is provided, and a restriction portion that positions the air cleaning nozzle at the cleaning preparation position when the paint tank is unloaded is provided. It is preferable that the air cleaning nozzle swings to a standby position by movement of the paint tank in the loading direction and swings to a cleaning preparation position as the paint tank moves in the discharge direction.

  In this configuration, the air cleaning nozzle swings to the standby position by the movement of the paint tank in the carrying-in direction. Thereby, the momentum at the time of carrying in the said paint tank is converted into a positional energy, and is stored as said urging | biasing force. Accordingly, the air cleaning nozzle swings toward the cleaning preparation position with the movement of the paint tank in the carrying-out direction. At this time, the air cleaning nozzle is positioned at the cleaning preparation position by the restricting portion. In other words, the swing mechanism also serves as the urging means. In addition, since the air cleaning nozzle is positioned at the cleaning preparation position by the restricting portion, the connection relationship between the suction pipe and the suction nozzle does not shift. The restricting portion can be realized at low cost by a locking hook, a suction magnet, or the like. For this reason, according to this structure, manufacturing cost is reduced. In this configuration, the urging means may be provided separately.

  Also, an elastic member is provided so that one end portion in the expansion / contraction direction is directed to the carry-out direction of the paint tank, the air washing nozzle is attached to one end portion of the elastic member, and the air wash nozzle is prepared for cleaning when the paint tank is carried out. When the air cleaning nozzle is pushed in the carry-in direction by the carry-in movement of the paint tank, the elastic member is compressed and the air wash nozzle is moved to the standby position, and the paint tank is moved to the standby position. It is also preferable to adopt a configuration in which the elastic member extends and the air cleaning nozzle moves to a cleaning preparation position when unloading.

  In this configuration, when the air washing nozzle is pushed in the carrying-in direction by the carrying-in movement of the paint tank, the elastic member is compressed, and accordingly, the air washing nozzle moves to the standby position. In this state, the elastic member expands when the paint tank is carried out, and the air cleaning nozzle moves to the cleaning preparation position accordingly. At this time, the air cleaning nozzle is positioned at the cleaning preparation position by the restricting portion. In other words, the elastic member serves as both the urging means and the reciprocating mechanism of the air cleaning nozzle. In addition, since the air cleaning nozzle is positioned at the cleaning preparation position by the restricting portion, the connection relationship between the suction pipe and the suction nozzle does not shift. The restricting portion can be realized at low cost by a locking hook, a suction magnet, or the like. Therefore, this configuration also reduces the manufacturing cost.

  Since the suction pipe is inserted into and removed from the paint tank, powder paint adheres to the outer surface thereof. Therefore, it is preferable to employ a configuration including an air blow unit that ejects air toward at least the outer surface of the suction pipe in a state where the air cleaning nozzle is at the cleaning preparation position. According to this configuration, the outer surface of the suction tube is cleaned by the air blow unit by moving the suction tube up and down by the lifting device while the air cleaning nozzle is at the cleaning preparation position. For this reason, in this configuration, cleaning of the outer surface of the suction pipe is simplified, and the color change time is further shortened.

  Here, the paint supply device may include a paint detection leveler that is inserted into and removed from the paint tank. In this case, the powder paint is also adhered to the outer surface of the paint detection leveler. Therefore, by adopting a configuration including a leveler blow unit that ejects air toward the outer surface of the paint detection leveler, the leveler outer surface can be cleaned in the same manner as the air blow unit.

  As described above, the powder coating apparatus according to the present invention does not need to retract the air cleaning nozzle from the installation space of the paint tank after cleaning the paint supply apparatus, and therefore can reduce the color change time. .

  Hereinafter, a powder coating apparatus according to a first embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows the front of the powder coating apparatus according to the first embodiment. As shown in FIG. 1, the powder coating apparatus 1 according to the first embodiment includes an elevating device 3 for inserting and removing a suction nozzle 12 of a suction pipe 11 of a paint supply device 10 into a paint tank 2, and a suction nozzle 12. And an air cleaning nozzle 20 for cleaning the inside of the suction pipe 11 with an air flow.

  The painting tank 2 is carried in and out from the front side in a state where the painting tank 2 is placed on the carriage 5 with respect to the open space of the machine frame 4 having a front opening. That is, the movement of the paint tank 2 in the carry-in direction is due to the cart 5 being pushed from the front side toward the back side. The unloading direction movement of the paint tank 2 is due to the cart 5 being pulled from the back side toward the front side.

  The open space of the machine casing 4 is provided with a margin more than the installation space of the painting tank 2. Here, the installation space of the painting tank 2 includes an occupied space at the installation position of the painting tank 2 and a moving space for carrying the painting tank 2 into and out of the installation position.

  On both sides of the installation position of the painting tank 2, as shown in FIG. 1, a pair of opposed frames 41 in the vertical direction are provided as shown by partially cutting the front of the machine casing 4. The frame 41 is provided with a guide groove 42 in the vertical direction, as shown in FIG. A slider 43 is mounted in the guide groove 42. The guide groove 42 and the slider 43 guide the stage 44 disposed above the installation position of the coating tank 2 in the vertical direction.

  The paint supply device 10 is mounted on the stage 44. The paint supply device 10 includes a suction pipe 11 and a suction device 13 to which the upper end side is connected. The suction device 13 generates a negative pressure with the suction nozzle 12 provided on the lower end side of the suction pipe 11 being inserted into the coating tank 2, sucks the powder paint from the paint tank 2, and connects to the suction device 13. A powder paint is ejected from a painted gun (not shown). For example, a conventionally well-known injector type can be used for the suction device 13. A paint detection leveler 14 that is inserted into and removed from the paint tank 2 is provided on the back side of the suction pipe 11.

  As shown in FIGS. 1 to 3, the lifting device 3 is attached to the upper frame 45 of the machine frame 4 and lifts the stage 44 relative to the paint tank 2. In this powder coating apparatus 1, an expansion / contraction cylinder is used for the lifting / lowering device 3, which is directed in the vertical direction. The stage 44 is fixed to the lower end portion of the piston rod 31 of the elevating device 3 with a plurality of paint supply devices 10 attached. When the cotter 44 is moved up and down by expansion and contraction of the lifting device 3, the suction nozzle 12 is inserted into and removed from the coating tank 2. The paint tank 2 is carried into and out of the installation position with the suction nozzle 12 pulled out from the paint tank 2 by the lifting device 3.

  On the other hand, the air cleaning nozzle 20 includes a receiving port 21 of the suction nozzle 12 and an air tube 22 connected to the lower side of the receiving port 21, as shown in FIG. In this powder coating apparatus 1, the air cleaning nozzle 20 is made of a resin member provided with a plurality of identical structures corresponding to each suction nozzle.

  In this powder coating apparatus 1, the lifting device 3 is provided so that the stage 44 can freely fall before the suction nozzle 12 reaches the coating tank 2. Thereby, the descent time of the suction nozzle 12 is shortened. For this reason, the suction tube 11 is made of an aluminum alloy in consideration of the impact of free fall. More preferably, the receiving port 21 may be provided with a packing (not shown) for receiving the suction nozzle 12. The packing absorbs the impact of free fall and prevents the air flow of the air cleaning nozzle 20 from leaking.

  The air cleaning nozzle 20 is configured to clean the inside of the suction pipe 11 with an air flow while being connected to the suction nozzle 12 (see FIG. 9). This air flow may be either blow or suction, or both may be switchable. When the air cleaning nozzle 20 cleans the inside of the suction pipe 11, the paint supply device 10 communicating with the suction pipe 11 and the powder paint transfer pipe (not shown) provided inside the paint gun are also caused by the above air flow. It is cleaned at the same time.

  As shown in FIGS. 2 and 6, the air cleaning nozzle 20 is provided so as to reciprocate between a cleaning preparation position facing the suction nozzle 12 and a standby position retracted from the installation space of the paint tank 2. Yes. Specifically, a swing mechanism is provided that supports the air cleaning nozzle 20 so as to be swingable between a standby position and a cleaning preparation position. By this swing mechanism, the air cleaning nozzle 20 moves to the cleaning preparation position following the movement of the paint tank 2 in the carry-out direction, and swings to the standby position as the paint tank 2 moves in the carry-in direction. Yes.

  The swing mechanism includes a swing shaft portion 51 provided on the lower surface of the upper frame 45 and a swing arm 52 pivotally supported by the swing shaft portion 51. The rocking shaft portion 51 is provided above the installation space of the paint tank 2. The lower end 53 of the swing arm 52 is an attachment portion for the air cleaning nozzle 20 and is provided so as to hang down in a natural state.

  The air cleaning nozzle 20 is pushed by the movement of the paint tank 2 in the carry-in direction, and accordingly, the swing arm 52 swings toward the back side. As a result, the air cleaning nozzle 20 swings to the standby position. At this time, the momentum when the paint tank 2 is carried in is converted into potential energy and stored as an urging force for moving the air cleaning nozzle 20 from the standby position to the cleaning preparation position.

  The swing mechanism releases the urging force by the movement of the paint tank 2 in the carry-out direction. That is, the air cleaning nozzle 20 swings toward the cleaning preparation position (front side) while adhering to the paint tank 2 by swinging the swing arm 52 toward the front side in accordance with the movement of the paint tank 2 in the carry-out direction. Move. At this time, the air cleaning nozzle 20 is positioned at the cleaning preparation position by the restriction portion 54 provided in the machine casing 4.

  As shown in FIG. 8, the restricting portion 54 positions the air cleaning nozzle 20 at a cleaning preparation position, and in this embodiment, includes a locking hook that is pivotally supported by the machine frame 4. When the swing arm 52 swings toward the cleaning preparation position, the locking piece 55 projecting from the lower end 53 hits and pushes up the restricting portion 54, and the restricting portion 54 is automatically lowered. In this state, the locking piece 55 is clamped between the machine casing 4 and the restricting portion 54, and the swing arm 52 is positioned in a suspended state. Thus, the air cleaning nozzle 20 is positioned at the cleaning preparation position with the receiving port 21 facing the suction nozzle 12 above it in the vertical direction. Note that the positioning of the restricting portion 54 is manually released.

  The swing arm 52 includes an air blow unit 60 that blows air toward the outer surface of the suction pipe 11 and the outer surface of the paint detection leveler 14 in a state where the air cleaning nozzle 20 is at the cleaning preparation position.

  As shown in FIG. 7, the air blow unit 60 includes an air supply tube 61 and a blow unit 62 through which the suction pipe 11 and the paint detection leveler 14 are inserted. With the air cleaning nozzle 20 in the cleaning preparation position, the lifting device 3 is operated to lower the stage 44, whereby the outer surface of the suction pipe 11 and the outer surface of the paint detection leveler 14 are continuously blown from the bottom to the top. Is done. That is, in this powder coating apparatus 1, the air blow part 60 also functions as a leveler blow part.

The operation of the powder coating apparatus 1 when changing colors will be described.
Initially, the paint tank 2 of the previous color is located in the installation space in the machine frame 4 as shown in FIGS. In this state, the air cleaning nozzle 20 is in the standby position. When the paint supply device 10 is stopped, the elevating device 3 raises the stage 44 as shown in FIG. 1 and completely pulls out the suction pipe 11 from the paint tank 2. Next, when the operator moves the carriage 5 to the front side, the swing arm 52 swings toward the front side, and the air cleaning nozzle 20 moves to the cleaning preparation position as shown in FIGS. During this time, the air blow unit 60 starts blowing. As shown in FIG. 8, when the regulating unit 54 positions the swing arm 52, the lifting device 3 causes the stage 44 to fall freely. As a result, the suction tube 11 and the like are inserted through the blow part 62 from the bottom to the top as shown in FIG.

  In this state, the suction nozzle 12 is fitted in the receiving port 21 as shown in FIGS. 4 and 9, and the air cleaning nozzle 20 cleans the inside of the suction pipe 11.

  After completion of cleaning, the lifting device 3 raises the stage 44 and opens the installation space for the paint tank 2 (see FIG. 5). Next, when the operator moves the paint tank 2 placed on the carriage 5 to the back side, the air cleaning nozzle 20 is pushed to the back side and the swing arm 52 swings. When the paint tank 2 is adjusted to the installation position, the air cleaning nozzle 20 moves to the standby position (see FIG. 1). Finally, the elevating device 3 lowers the stage 44 and inserts the suction nozzle 12 into the paint tank 2 (see FIGS. 2 and 3).

  A second embodiment of the present invention will be described with reference to FIGS. 10 (a) and 10 (b). In the following, only differences from the powder coating apparatus 1 according to the first embodiment will be described, and the components that can be considered to be the same are denoted by the same reference numerals and description thereof will be omitted. As shown in FIGS. 10A and 10B, the powder coating apparatus 70 according to the second embodiment has an elastic member 71 whose one end 72 in the expansion / contraction direction is the paint tank 2 instead of the swing mechanism. It is provided in the machine casing 4 so as to face the carry-out direction. The air cleaning nozzle 20 is attached to one end portion 72 of the elastic member 71. The one end portion 72 is provided with the above-described locking piece 55, and similarly, the machine frame 4 is provided with a regulating portion 54.

  As shown in FIG. 10A, when the air cleaning nozzle 20 is pushed in the carry-in direction by the carry-in movement of the paint tank 2, the elastic member 71 is compressed. Along with this, the air cleaning nozzle 20 moves to the standby position. In this state, the elastic member 71 accumulates a biasing force that moves the air cleaning nozzle 20 to the cleaning preparation position. For this reason, as shown in FIG. 10 (b), the elastic member 71 expands with the carry-out movement of the paint tank 2, and the air cleaning nozzle 20 moves to the cleaning preparation position. In this state, the support part 73 provided integrally with the restriction part 54 supports the air cleaning nozzle 20 upward.

  The powder coating apparatus 70 does not include the air blow unit 60 described above. When the air blow unit 60 is provided in the powder coating apparatus 70, the air blow unit 60 can be fixed to the machine casing 4, for example.

The front view in the state where the paint tank was carried into the powder coating apparatus according to the first embodiment The side view of the state where the suction nozzle is inserted into the paint tank from the state of FIG. Front view of the state of FIG. Partially enlarged longitudinal sectional view of the state where the suction nozzle is fitted to the receiving port of the air cleaning nozzle The front view which shows the state by which the paint tank was carried out from the state of FIG. Side view of the state of FIG. Partially enlarged perspective view showing a state where the suction pipe and the paint detection leveler are inserted into the air blow unit The elements on larger scale which show the control part of the state of FIG. Front view of the suction nozzle fitted to the air cleaning nozzle receptacle (A) is a side view of a state where the paint tank is carried into the powder coating apparatus according to the second embodiment, and (b) is a case where the paint tank is carried out from the state of FIG. Side view of the fitting state of the cleaning nozzle

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,70 Powder coating apparatus 2 Paint tank 3 Lifting apparatus 10 Paint supply apparatus 11 Suction pipe 12 Suction nozzle 14 Paint detection leveler 20 Air washing nozzle 51 Swing shaft part 52 Swing arm 54 Restriction part 55 Locking piece 60 Air blow Part 62 blow part 71 elastic member 72 one end part 73 support part

Claims (6)

  In a powder coating apparatus comprising: an elevating device for inserting and removing a suction nozzle of a suction pipe of a paint supply device into a paint tank; and an air cleaning nozzle connected to the suction nozzle and cleaning the inside of the suction pipe by an air flow. An air cleaning nozzle is provided so as to reciprocate between a cleaning preparation position facing the suction nozzle and a standby position for retreating from the paint tank installation space, and the air cleaning nozzle moves in the direction of carrying out the paint tank. A powder coating apparatus that follows and moves to a cleaning preparation position, and moves to a standby position following the movement of the paint tank in the loading direction.   There is provided an urging means for moving the air cleaning nozzle from the standby position to the cleaning preparation position, and the urging means accumulates the urging force by moving the paint tank in the loading direction, and the urging force by moving the paint tank in the unloading direction. The powder coating apparatus according to claim 1, wherein the powder coating apparatus is opened.   A swing mechanism that swingably supports the air cleaning nozzle between a standby position and a cleaning preparation position; and a regulating portion that positions the air cleaning nozzle at a cleaning preparation position when the paint tank is unloaded. 3. The powder according to claim 1, wherein the cleaning nozzle swings to a standby position by movement of the paint tank in the loading direction and swings to a cleaning preparation position by movement of the paint tank in the discharge direction. Body painting equipment.   An elastic member is provided so that one end portion in the expansion and contraction direction thereof faces the carrying-out direction of the paint tank, the air washing nozzle is attached to one end portion of the elastic member, and the air washing nozzle is set to a cleaning preparation position when carrying out the paint tank. When the air cleaning nozzle is pushed in the loading direction by the carry-in movement of the paint tank, the elastic member is compressed and the air wash nozzle moves to the standby position, and the paint tank is carried out. 3. The powder coating apparatus according to claim 1, wherein when the elastic member expands, the air cleaning nozzle moves to a cleaning preparation position.   5. The powder coating according to claim 1, further comprising an air blow unit that blows air toward at least an outer surface of the suction pipe in a state where the air cleaning nozzle is in a cleaning preparation position. apparatus.   6. The paint supply device according to claim 1, further comprising: a paint detection leveler that is inserted into and removed from the paint tank, and a leveler blow unit that blows air toward an outer surface of the paint detection leveler. The powder coating apparatus in any one.

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