JP2008000649A - Unit type spraying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spraying device composed to shorten a downtime in cleaning or replacing a spray gun body. <P>SOLUTION: This spraying device 100 is provided with a gun unit 110 atomizing paint for jetting, and a bracket unit 210 for receiving paint and air. The bracket unit 210 is composed to be detachably fixed to the gun unit 110. When the bracket unit 210 is fixed to the gun unit 110, the received paint and air flow through the gun unit 110. A nozzle opening/closing valve 150 is moved to the rear side for jetting the paint from a paint jetting hole 122 and atomizing the jetted paint, and at the same time, a pattern of the atomized paint can be formed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spray device for spraying paint on an object to be painted. In particular, the present invention relates to a unit-type spray device configured to include two units that are detachable from each other. Furthermore, the present invention relates to a spray apparatus that sprays not only paints but also various objects such as water, adhesives, rust preventives, insulating agents, coating agents, and chemicals on the object to be sprayed.

  Referring to FIG. 13, in an example of a conventional spray application apparatus, a spray gun 800 includes a spray gun body 810, a nozzle member 820, and a connecting member 830 that connects the spray gun body 810 and the nozzle member 820. Yes. The spray gun body 810 is fixed to the robot arm 850. Five connecting members are provided on the spray gun body 810. FIG. 13 illustrates the first connection member 811, the second connection member 812, and the third connection member 813, but the fourth connection member and the fifth connection member are not illustrated. A paint channel (not shown) is provided at the center of the spray gun body 810. An ejection hole (not shown) is provided in the front side portion of the nozzle member 820. Conventionally, as a connecting member, for example, “Quick Seal Fitting L4N6 × 4-PT1 / 8” manufactured by Nitta Moore Co., Ltd. is used (refer to JIS B 8381-1995, a fitting for a flexible pipe for pneumatic pressure). .

  The paint channel is configured to flow through the ejection hole. A needle valve (not shown) is placed in the paint channel. The front end portion of the needle valve is disposed so as to open and close the ejection hole. The rear end of the rear side of the needle valve is supported by a piston (not shown). By supplying the working air, the piston operates, and the needle valve moves forward. When the needle valve closes the ejection hole, the paint in the paint channel does not flow out of the ejection hole. When the needle valve moves backward by the operation of the piston to open the ejection hole, the paint in the paint channel flows out from the ejection hole.

  The first connecting member 811 is connected to a piston operating air supply pipe 841 for supplying air for operating the piston to the piston. The second connecting member 812 is connected to an atomizing air supply pipe 842 that supplies air for atomizing the paint to the spray gun body. The third connection member 813 is connected to a paint feed pipe 843 that supplies the paint to the paint channel in the spray gun body. The fourth connecting member is connected to a pattern air supply pipe (not shown) that supplies air for forming a paint pattern to the spray gun body. The fifth connecting member is connected to a paint return pipe (not shown) for returning the paint from the paint channel in the spray gun body.

  The inside of the first connection member 811 circulates in a piston operating air flow path (not shown) provided in the spray gun body 810. The inside of the second connection member 812 circulates in an atomizing air flow path (not shown) provided in the spray gun body 810. The inside of the third connection member 813 circulates in the paint channel provided in the spray gun body 810. The inside of the fourth connecting member circulates in a pattern air flow path (not shown) provided in the spray gun body 810. The inside of the fifth connection member 812 circulates in a paint flow path (not shown) provided in the spray gun body 810. The paint is supplied from the paint tank (not shown) to the inside of the third connecting member 813 through the paint feed pipe 843 by a paint pump (not shown). The paint circulating through the paint flow path is returned from the inside of the fifth connection member 812 to the paint tank through the paint return pipe.

  A conventional spray application device that can be attached to a robot hand equipped with a nozzle and a spray gun is disclosed in, for example, Patent Document 1. In this spray coating apparatus, a mist-like adhesive is sprayed from a nozzle provided in front of the spray gun. Furthermore, air blowing means for blowing shielding air to the outer periphery of the application area is provided. A spray gun for an electrostatic powder coating robot is disclosed in, for example, Patent Document 2. In this spray gun, a high voltage generator attached to the arm of the painting robot and an injection nozzle attached to the wrist of the robot are formed separately.

  Moreover, the conventional rotary atomization type coating machine is disclosed by patent document 3 and patent document 4, for example. In these rotary atomizing type coating machines, the paint discharged through the paint guide member and forward is sprayed by a rotating bell with an atomizing desk.

JP 2000-197835 A JP-A-4-104851 JP 2004-321845 A Japanese Patent Laid-Open No. 3-221166

  In the conventional spray coating apparatus, a plurality of connection members for air and a plurality of connection members for paint are directly provided on the spray gun body. For example, in the conventional spray coating apparatus shown in FIG. 13, three connecting members for air and two connecting members for paint are directly attached to the spray gun body. In this conventional spray application device, when the spray gun body is removed from the robot arm to clean the spray gun body or the spray gun body is replaced, a plurality of pipes (piston operating air supply pipe, The atomizing air supply pipe, paint feed pipe, pattern air air supply pipe, paint return pipe, etc.) had to be removed from the spray gun body. Further, when the nozzle is worn by the paint, it is necessary to remove the spray gun body from the arm of the robot in order to replace the nozzle. Therefore, there has been a problem that the down time of the spray coating apparatus becomes longer when the spray gun body is cleaned and replaced, or when the nozzle is replaced, and the loss time in the coating process becomes longer.

An object of the present invention is to provide a spray device configured to reduce the downtime when cleaning the spray gun body, replacing the spray gun body, or replacing the nozzle.
Another object of the present invention is to provide a spray device that facilitates the manufacture and assembly of components.

  The present invention is a spray device for spraying paint from a paint spray hole provided in a nozzle, and is configured to include a gun unit for atomizing paint and ejecting the paint, and a bracket unit for receiving paint and air. did. The bracket unit is configured to be detachably fixed to the gun unit. When the bracket unit is fixed to the gun unit, the paint and air received by the bracket unit are configured to flow to the gun unit. With this configuration, it is possible to reduce downtime during cleaning of the spray gun body, replacement of the spray gun body, and replacement of the nozzle.

  In the spray apparatus according to the present invention, the gun unit includes a gun paint channel for distributing paint, a gun atomizing air channel for distributing atomized air for atomizing the paint, and a gun paint channel. It is preferable to include a nozzle having a paint spray hole provided so as to circulate and an air cap having an atomizing air hole provided so as to circulate in the gun atomizing air flow path. When the paint spray hole is opened, paint that passes through the gun paint flow path is sprayed from the paint spray hole, and the atomized air is sprayed from the atomizing air hole to atomize the paint sprayed from the paint spray hole. It is good to be configured so that

  Furthermore, in the spray device of the present invention, the bracket unit includes a bracket paint channel for distributing the paint and a bracket atomizing air channel for distributing atomized air for atomizing the paint. It is good to be configured. Further, in the spray device of the present invention, the gun unit distributes the nozzle opening / closing valve for opening / closing the paint spray hole, the valve opening / closing device for operating the nozzle opening / closing valve, and the operating air for operating the valve opening / closing device. A bracket operating air passage for operating the valve opening and closing device and a bracket operating air passage for circulating the operating air for operating the valve opening / closing device, and when the bracket unit is fixed to the gun unit, The air flow path may be configured to flow through the bracket operating air flow path.

  Furthermore, in the spray device of the present invention, the gun unit has a gun paint return flow path that is provided so as to circulate with the gun paint flow path and returns the paint, and the bracket unit is a bracket paint for returning the paint. It is preferable that the gun paint return channel is configured to flow through the bracket paint return channel when the bracket unit is fixed to the gun unit. Furthermore, in the spray device of the present invention, the gun unit circulates in the gun pattern air flow path for flowing pattern air for forming the pattern of the paint sprayed from the paint spray holes, and the gun pattern air flow path. The bracket unit has a bracket pattern air flow path for circulating pattern air, and when the bracket unit is fixed to the gun unit, the gun pattern air flow path is It is preferable to be configured to circulate in the bracket pattern air flow path.

  Furthermore, in the spray device of the present invention, the gun unit includes a gun fixing member for fixing the bracket unit to the gun unit, the gun fixing member has a fixing groove, and the spray device has the fixing groove. It is good to comprise so that the unit fixing member which has the lock fixing | fixed part which can be fixed with respect to will be provided. With this configuration, manufacturing and assembly of the component parts can be facilitated. Further, in the spray device of the present invention, the fixing groove portion is formed by an oblique groove portion formed obliquely with respect to the longitudinal axis of the gun fixing member, so that the unit fixing member can be fitted into the oblique groove portion. It is preferable to have a fixing protrusion formed on the surface. With this configuration, manufacturing and assembly of the component parts can be facilitated.

  Further, the present invention relates to a gun paint passage for distributing paint and a gun atomization for distributing atomized air for atomizing the paint in a spray device for spraying the paint from the paint ejection hole of the nozzle. An air flow path, a paint ejection hole provided to circulate in the gun paint flow path, an air cap having an atomization air hole provided to circulate in the gun atomization air flow path, and a paint ejection hole A gun unit including a nozzle opening and closing valve for opening and closing the valve, a valve opening and closing device for operating the nozzle opening and closing valve, a gun operating air passage for circulating operating air for operating the valve opening and closing device, and a paint Bracket paint channel for circulating, bracket atomizing air channel for distributing atomized air for atomizing paint, and bracket for distributing operating air for operating the valve opening and closing device It was configured with a bracket unit including a preparative operating air passage.

  This spray device is configured to be able to introduce paint from the inlet side end of the bracket paint flow path, and to be able to introduce working air from the inlet side end of the bracket working air flow path. The bracket unit is configured to be detachably fixed to the gun unit, and when the bracket unit is fixed to the gun unit, the end portion on the inlet side of the gun paint channel is on the outlet side of the bracket paint channel. It is connected to the end, and the inlet side end of the gun working air flow path is configured to be connected to the outlet side end of the bracket working air flow path. In this spray device, when the nozzle opening / closing valve is actuated to open the paint ejection hole, the paint passing through the gun paint flow path is ejected from the paint ejection hole, and the atomization air is ejected from the atomization air hole. The paint ejected from the hole can be atomized. With this configuration, it is possible to reduce downtime during cleaning of the spray gun body, replacement of the spray gun body, and replacement of the nozzle.

  In this spray device, the nozzle opening / closing valve is a needle valve disposed in the gun paint passage, and the tip of the needle valve is preferably configured to open and close the ejection hole. In this spray device, the valve opening / closing device is a piston that is operated by operating air, and the rear end portion of the needle valve is preferably fixed to the piston. With this configuration, it is possible to reduce downtime during cleaning of the spray gun body, replacement of the spray gun body, and replacement of the nozzle.

  The spray device of the present invention can be used by being attached to a robot arm, or can be used by an operator holding it in hand. The supply source of the working air and the working air flow path of the bracket unit are connected using a pipe. The supply source of atomization air and the atomization air flow path of the bracket unit are connected using piping. The pattern air supply source and the pattern air flow path of the bracket unit are connected using a pipe. The paint supply source and the paint flow path of the bracket unit are connected using a pipe. By using the gun fixing member and the unit fixing member to fix the bracket unit in close contact with the gun unit, the paint and air can be reliably circulated between the bracket unit and the gun unit.

  Next, the working air is sent from the working air supply source to the gun unit, the nozzle opening / closing valve is moved rearward, and the paint is ejected from the paint ejection hole. At this time, by introducing the atomizing air from the atomizing air supply source and ejecting the atomizing air from the atomizing air hole, the paint ejected from the paint ejection hole can be atomized. At the same time, the pattern air is introduced from the pattern air supply source, and the pattern air is ejected from the pattern air holes, whereby an atomized paint pattern can be formed. The remaining paint not ejected from the paint ejection hole can be returned to the paint supply source (or paint tank). In this way, a paint circulation line can be constructed. Alternatively, by using the spray device of the present invention, not only paints but also various liquids such as water, adhesives, rust preventives, insulating agents, coating agents and chemicals can be sprayed automatically or manually. .

  The bracket unit can be removed from the gun unit when cleaning the spray gun body, replacing the spray gun body, or replacing the nozzle. The gun unit of the spray device can then be removed from the robot arm as needed. Next, if necessary, the spray gun body can be cleaned, the spray gun body can be replaced, or the nozzle can be replaced. Alternatively, the spray device can be removed from the robot arm when the spray gun body is cleaned, when the spray gun body is replaced, or when the nozzle is replaced.

  The present invention is configured such that the spray device includes two units that are detachable from each other. Therefore, the spray device of the present invention does not require the connection hose to be removed from the spray device when cleaning the spray gun body, replacing the spray gun body, or replacing the nozzle. Therefore, it is possible to reduce the downtime of the painting work when cleaning the spray gun body, replacing the spray gun body, or replacing the nozzle. In addition, since the spray device of the present invention has a detachable unit structure, it is easy to manufacture and assemble parts constituting each unit.

(1) Configuration of spray device:
Embodiments of the present invention will be described below with reference to the drawings. The embodiment of the present invention described below relates to a spray device that sprays paint on an object. However, the spray device according to the present invention is not limited to paint, but includes water, liquid type adhesive, and liquid type. Note that it can be widely applied to various liquids such as rust preventives, liquid type insulating agents, liquid type coating agents, and liquid type chemicals. Referring to FIGS. 1 to 3, in the embodiment of the present invention, a spray device 100 for spraying paint onto an object to be coated from a paint ejection hole of a nozzle is a gun unit for atomizing the paint and ejecting it. 110, a bracket unit 210 for receiving paint and air, and a unit fixing device 310 for fixing the gun unit 110 and the bracket unit 210. By using the unit fixing device 310, the bracket unit 210 is configured to be detachably fixed to the gun unit 110.

(2) Gun unit configuration:
1 to 3, the gun unit 110 includes a gun main body 112 constituting a base member, a nozzle 114 supported on the front side of the gun main body 112, an air cap 120 supported on the front side of the nozzle 114, A retaining ring 130 that supports the air cap 120 with respect to the gun body 112 is provided. Here, “front” and “front side” indicate directions and sides in which the paint is ejected in the gun unit 110, and “rear” and “rear side” indicate directions in which the paint is ejected in the gun unit 110, The direction and side opposite to the side are shown.

  The nozzle 114 is formed in a cylindrical shape and defines a nozzle center axis 114A. The tip of the nozzle 114 is formed in a tapered shape. A paint ejection hole 122 for ejecting paint is provided at the tip of the nozzle 114. The inside of the nozzle 114 can distribute | circulate a liquid coating material. The air cap 120 forms an atomizing air hole 124 for ejecting air so as to atomize the paint ejected from the paint ejecting hole 122 and a pattern of the atomized paint ejected from the paint ejecting hole 122. Pattern air holes 126 for ejecting the air. The tip of the nozzle 114 is disposed in the nozzle hole of the air cap 120. The central axis of the paint ejection hole 122 is disposed on the nozzle central axis 114A. The center of the nozzle hole of the air cap 120 is disposed on the nozzle center axis 114A.

  A plurality of atomizing air holes 124 are preferably arranged concentrically around the nozzle center axis 114A. Alternatively, a plurality of atomizing air holes 124 are arranged concentrically with the first radius around the nozzle center axis 114A, and further, a further radius different from the first radius (second radius or second radius). And the third radius may be concentrically arranged around the nozzle center axis 114A.

  Although two atomizing air holes 124 are shown in FIG. 2, the number of atomizing air holes 124 may be two, or may be three or more. The plurality of atomizing air holes 124 are preferably arranged concentrically around the nozzle center axis 114A at equal angular intervals. A plurality of pattern air holes 126 are preferably arranged concentrically around the nozzle center axis 114A. The pattern air holes 126 are preferably arranged outside the atomizing air holes 124. Although two pattern air holes 126 are shown in FIG. 2, the number of pattern air holes 126 may be two, or may be three or more. The plurality of pattern air holes 126 are preferably arranged concentrically around the nozzle center axis 114A at equal angular intervals. Alternatively, a plurality of pattern air holes 126 are arranged concentrically with the first radius around the center axis 114A of the nozzle, and a further radius different from the first radius (second radius or second radius). In the radius and the third radius, a plurality of nozzles can be concentrically arranged around the nozzle center axis 114A.

  The gun unit 110 further includes a baffle 134 disposed outside the nozzle 114 and on the front side of the gun body 112. The gun unit 110 further includes a rear housing 140 disposed inside the gun body 112, an adjustment screw 142 disposed at the rearmost part of the gun body 112, and a position of the adjustment screw 142 disposed behind the gun body 112. An adjustment lock nut 144 for determining the position, a needle for opening and closing the paint injection hole 122, that is, a nozzle on-off valve 150, a needle lock nut 152 for supporting the rear portion of the nozzle on-off valve 150, and an outer periphery of the needle lock nut 152 A piston flange 154 for supporting the piston flange 154, a retainer 156 for supporting the outer periphery behind the piston flange 154, and a piston cup 158 for supporting the outer periphery in front of the piston flange 154. The central axis of the nozzle opening / closing valve 150 is arranged at the nozzle central axis 114A. The retainer 156 is fixed to the piston flange 154 by a set screw 146. A housing seal member 145 is provided inside the rear housing 140 to seal the rear housing 140 and the outer periphery of the nozzle opening / closing valve 150.

  The central axis of the nozzle opening / closing valve 150 is disposed on the nozzle central axis 114A. The needle lock nut 152 is screwed and fixed to a male screw formed outside the rear part of the nozzle opening / closing valve 150. The needle lock nut 152, the piston flange 154, the retainer 156, and the piston cup 158 are configured together with the nozzle opening / closing valve 150 so as to be movable in the front-rear direction along the nozzle center axis 114A. When the nozzle opening / closing valve 150 moves in the front-rear direction, the paint ejection hole 122 can be opened and closed by the front end portion of the nozzle opening / closing valve 150.

  The adjustment lock nut 144 is screwed and fixed to a male screw formed outside the rear portion of the gun body 112. The adjustment screw 142 is screwed and fixed to a male screw formed outside the rear portion of the gun body 112. The center axis of the adjustment screw 142 is disposed on the nozzle center axis 114A. The position of the adjustment screw 142 can be determined by the adjustment lock nut 144. An air vent hole 142 a is provided on the central axis of the adjustment screw 142.

  The gun unit 110 further includes a spring, that is, a piston spring 160 for pushing the nozzle opening / closing valve 150 forward. The piston spring 160 can be constituted by a coil spring, for example. The rear portion of the piston spring 160 is disposed so as to contact the inside of the adjustment screw 142. The front portion of the piston spring 160 is disposed in contact with the piston cup 158 so as to push the piston cup 158 forward. The central axis of the piston spring 160 is disposed at the nozzle central axis 114A. The adjustment screw 142, the needle lock nut 152, the piston flange 154, the retainer 156, the piston cup 158, and the piston spring 160 constitute a valve opening / closing device for operating the nozzle opening / closing valve 150. When the adjustment screw 142, the needle lock nut 152, the piston flange 154, the retainer 156, and the piston cup 158 move rearward, the air inside the adjustment screw 142 can be discharged to the outside from the air vent hole 142a.

  A gun paint channel 170 for distributing the paint is provided inside the gun unit 110. A part of the gun paint flow path 170 is disposed between the inner wall of the nozzle 114 and the nozzle opening / closing valve 150. The downstream side of the gun paint channel 170 is configured to flow through the paint ejection hole 122. It is configured so that the paint can be fed from the inlet side end of the gun paint flow path 170 toward the paint ejection hole 122. In this configuration, the nozzle open / close valve 150 is a needle valve disposed in the gun paint flow path 170. Accordingly, the tip end portion of the needle valve is configured to open and close the paint ejection hole 122. A gun paint return channel 148 for returning the paint is provided inside the gun unit 110.

  A gun atomizing air flow path 172 for circulating atomizing air is provided inside the gun unit 110. A part of the gun atomizing air flow path 172 is disposed between the inner wall of the baffle 134 and the outer wall of the nozzle 114. The downstream side of the gun atomizing air flow path 172 is configured to flow into the atomizing air hole 124. An atomizing air can be sent from the inlet side end of the gun atomizing air channel 172 toward the atomizing air hole 124.

  A gun pattern air flow path 174 for distributing pattern air is provided inside the gun unit 110. A part of the gun pattern air flow path 174 is disposed between the inner wall of the retaining ring 130 and the outer wall of the baffle 134. The downstream side of the gun pattern air flow path 174 is configured to flow through the pattern air hole 126. The pattern air can be sent from the inlet side end of the gun pattern air flow path 174 toward the pattern air hole 126.

  A gun operating air flow path 180 for circulating operating air for operating the valve opening / closing device is provided inside the gun unit 110. A portion of the gun paint channel 170 is disposed between the rear inner wall of the gun body 112 and the rear outer wall and rear end of the rear housing 140. The downstream side of the gun working air flow path 180 is configured to flow into a cylinder chamber 182 provided at the front end portion of the piston flange 154 and the front end portion of the piston cup 158. The operation air can be sent to the cylinder chamber 182 from the inlet side end of the gun operation air flow path 180. In this configuration, the valve opening / closing device is a piston that is operated by operating air sent to the cylinder chamber 182. Therefore, the rear end portion of the nozzle opening / closing valve 150 (that is, the needle valve) is fixed to the piston, that is, the needle lock nut 152, the piston flange 154, the retainer 156, and the piston cup 158.

(3) Configuration of bracket unit:
1 to 3, the bracket unit 210 includes a bracket body 212 that constitutes a base member of the bracket unit. A bracket operating air flow path 280 for circulating operating air for operating the valve opening / closing device is provided inside the bracket body 212. A working air joint 284 is provided at the inlet end of the bracket working air flow path 280. The working air supply source and the working air joint 284 can be connected using a piping member such as a connection hose (not shown). It is comprised so that working air can be introduce | transduced into the spray apparatus 100 from the inlet side edge part of the bracket working air flow path 280. FIG. When the bracket unit 210 is fixed to the gun unit 110, the inlet side end of the gun working air flow path 180 is connected to the outlet side end of the bracket working air flow path 280. It is preferable to arrange an O-ring at this connection portion. The O-ring may be provided in the bracket unit 210, may be provided in the gun unit 110, or may be provided in both.

  Referring to FIGS. 1 to 3, a bracket atomizing air flow path 272 for circulating atomizing air is provided in the bracket body 212. An atomizing air joint 276 is provided at the inlet end of the bracket atomizing air flow path 272. The atomizing air supply source and the atomizing air joint 276 can be coupled using a piping member such as a connection hose (not shown). It is comprised so that atomization air can be introduce | transduced into the spray apparatus 100 from the inlet side edge part of the bracket atomization air flow path 272. FIG. When the bracket unit 210 is fixed to the gun unit 110, the inlet side end of the gun atomizing air flow path 172 is connected to the outlet side end of the bracket atomizing air flow path 272. It is preferable to arrange an O-ring at this connection portion. The O-ring may be provided in the bracket unit 210, may be provided in the gun unit 110, or may be provided in both.

  Referring to FIGS. 4 and 6, a bracket pattern air flow path 274 for circulating pattern air is provided in the bracket body 212. A pattern air joint 278 is provided at the inlet end of the bracket pattern air flow path 274. The pattern air supply source and the pattern air joint 278 can be coupled using a piping member such as a connection hose (not shown). Pattern air can be introduced into the spray device 100 from the inlet side end of the bracket pattern air flow path 274. When the bracket unit 210 is fixed to the gun unit 110, the inlet side end of the gun pattern air flow path 174 is configured to be connected to the outlet side end of the bracket pattern air flow path 274. It is preferable to arrange an O-ring at this connection portion. The O-ring may be provided in the bracket unit 210, may be provided in the gun unit 110, or may be provided in both.

  Referring to FIGS. 3 and 6, a bracket paint channel 270 for passing paint is provided in the bracket body 212. A paint inlet joint 262 is provided at the inlet end of the bracket paint channel 270. The paint supply source and the paint inlet joint 262 can be coupled using a piping member such as a connection hose (not shown). It is comprised so that a coating material can be introduce | transduced into the spray apparatus 100 from the exit side edge part of the bracket coating material flow path 270. FIG. When the bracket unit 210 is fixed to the gun unit 110, the inlet side end of the gun paint channel 170 is connected to the outlet side end of the bracket paint channel 270. It is preferable to arrange an O-ring at this connection portion. That is, when the bracket unit 210 is fixed to the gun unit 110, the paint and air received by the bracket unit 210 are configured to flow to the gun unit 110. The O-ring may be provided in the bracket unit 210, may be provided in the gun unit 110, or may be provided in both.

  When the spray device according to the present invention is applied to liquids such as water, liquid type adhesives, liquid type rust preventives, liquid type insulating agents, liquid type coating agents, liquid type chemicals, etc., they should be sprayed. The liquid supply source and the paint inlet joint 262 (that is, a joint configured as a “liquid inlet joint” in this case) are connected using a piping member such as a connection hose (not shown). Can do.

  Referring to FIG. 3, a bracket paint return channel 250 for distributing paint is provided in the bracket body 212. A paint outlet joint 252 is provided at the inlet end of the bracket paint return channel 250. The paint supply source (or paint tank) and the paint outlet joint 252 can be connected using a piping member such as a connection hose (not shown). Via the outlet side end of the bracket paint return channel 250, the paint can be returned from the spray device 100 to a paint supply source (or paint tank) or the like. When the bracket unit 210 is fixed to the gun unit 110, the inlet side end of the gun paint return channel 148 is connected to the outlet side end of the bracket paint return channel 250. It is preferable to arrange an O-ring at this connection portion. The O-ring may be provided in the bracket unit 210, may be provided in the gun unit 110, or may be provided in both.

  When the spray device according to the present invention is applied to liquids such as water, liquid type adhesives, liquid type rust preventives, liquid type insulating agents, liquid type coating agents, liquid type chemicals, etc., the liquid supply source (Or a liquid tank) and a paint outlet joint 252 (that is, a joint configured as a “liquid outlet joint” in this case) are connected using a piping member such as a connection hose (not shown). can do. Since the spray device of the present invention has a unit structure including a gun unit and a bracket unit, the manufacturing process of each component is simple, and the assembly of the components is easy.

(4) Configuration of unit fixing device:
1 to 3, in the spray device 100, the bracket unit 210 is configured to be detachably fixed to the gun unit 110 using a unit fixing device 310. Unit fixing device 310 includes a gun fixing member 320 and a unit fixing member 350. The gun unit 110 includes a gun fixing member 320 for fixing the bracket unit 210 to the gun unit 110 and a fixed guide member 322 for performing guidance when fixing the bracket unit 210 to the gun unit 110. The fixed guide member 322 can be constituted by a guide pin. A fixed guide hole for slidably receiving the fixed guide member 322 is provided in the bracket body 212.

  Referring to FIGS. 7 and 8, the gun fixing member 320 is constituted by a positioning bolt. The gun fixing member 320 includes an upper distal end shaft portion 321, a male screw portion 322, outer peripheral strip portions 323, 324, and 325, and a fixing groove portion 326. The male screw portion 322 is screwed and fixed to the female screw portion formed in the gun body 112. The fixing groove portion 326 is formed obliquely with respect to the longitudinal axis of the gun fixing member 320 (that is, formed in a spiral shape), and is formed continuously to the lower end portion of the oblique groove portion 330. It is composed of a longitudinal groove 332 and a horizontal groove 334 formed continuously upward from the oblique groove 330. For example, the diagonal groove 330 is formed 120 degrees around the longitudinal axis at the lead 6.0, and then the horizontal groove 334 is formed 60 degrees. For example, the width in the direction of the longitudinal axis of the oblique groove 330 is 4 mm.

  The central axis of the gun fixing member 320 is arranged to be parallel to the central axis of the fixed guide member 322. The bracket body 212 is provided with a bracket mounting hole that can be slidably fitted to the outer peripheral band portions 323, 324, and 326 of the gun fixing member 320.

  Referring to FIGS. 9 and 10, the unit fixing device 310 further includes a unit fixing member 350 having a lock fixing portion that can be fixed to the fixing groove portion 326. The unit fixing member 350 is preferably composed of a lock collar. If necessary, a wave washer 380 (shown in phantom lines in FIGS. 9 and 10) may be provided on the distal end surface of the lock collar. The unit fixing member 350 is a unit fixing guide that can be slidably fitted to a fixing protrusion 352 formed so as to be fitted in the oblique groove 330 and an outer peripheral belt-like portion 325 of the gun fixing member 320. It has a hole 354 and an outer peripheral groove 356 provided on the outer periphery. The fixing protrusion 352 may be formed of a fixing pin fixed perpendicularly to the longitudinal axis of the unit fixing member 350. Referring to FIG. 1, a unit holding screw hole for receiving a unit holding screw 370 for holding the unit fixing member 350 in the bracket main body 212 is provided in the bracket main body 212. The center axis of the unit holding screw hole is preferably arranged in parallel with the nozzle center axis 114A.

  Referring to FIG. 10, a handle 360 for rotating the unit fixing member 350 is attached to the unit fixing member 350 so as to be rotatable about a handle reference line 360 </ b> A perpendicular to the longitudinal axis of the unit fixing member 350. For example, the handle 360 may have a ring shape with an opening angle of 180 degrees. The handle 360 is provided so as to be rotatable with respect to the handle pin 362 fixed to the unit fixing member 350. The center axis of the handle pin 362 is disposed on the handle reference line 360A. A rotation restricting portion 366 for restricting the rotation of the handle 360 when the plane including the surface of the handle 360 is disposed perpendicular to the longitudinal axis of the unit fixing member 350 is provided on the inner peripheral portion of the handle 360. .

  Alternatively, the bracket unit 210 can be fixed to the gun unit 110 using a known fastening member such as a bolt and a nut. For example, the bracket unit 210 can be fixed to the gun unit 110 using a through bolt with a hexagonal hole.

(5) Operation of spray device:
Referring to FIGS. 1 and 12, the spray device 100 can be used by being attached to a robot arm 400. Alternatively, the spray device 100 can be used by an operator. For example, the working air supply source and the working air joint 284 of the bracket unit 210 of the spray device 100 are connected using a pipe such as the connection hose 410. The atomizing air supply source and the atomizing air joint 276 of the bracket unit 210 are connected using a pipe such as the connection hose 410. The pattern air supply source and the pattern air joint 278 of the bracket unit 210 are coupled using a pipe such as the connection hose 410.

  The paint supply source and the paint inlet joint 262 of the bracket unit 210 are connected using a pipe such as the connection hose 410. The coating material can be supplied using a pump (not shown) provided in the middle of the piping between the coating material supply source and the spray device 100. The paint supply source (or paint tank) and the paint outlet joint 252 of the bracket unit 210 are connected using a pipe such as the connection hose 410. As a paint to be used, a solid paint can be used, and a metallic paint can also be used. A paint containing an organic solvent can be used. Moreover, the coating material containing aluminum powder can be used.

  The fixing guide hole of the bracket body 212 of the bracket unit 210 is fitted into the fixing guide member 322 of the gun unit 110, the bracket mounting hole of the bracket body 212 is fitted to the gun fixing member 320, and the bracket unit 210 is closely attached to the gun unit 110. Let The unit fixing member 350 is assembled into the gun fixing member 320 by aligning the fixing protrusion 352 of the unit fixing member 350 with the longitudinal groove 332 of the gun fixing member 320. The unit holding screw 370 is screwed into the unit holding screw hole, the tip of the unit holding screw 370 is positioned in the outer peripheral groove portion 356 of the unit fixing member 350, and the unit fixing member 350 is held with respect to the bracket body 212. By rotating the handle 360, the fixing projection 352 is rotated along the oblique groove 330. By such rotation of the handle 360, the unit fixing member 350 moves in a direction in close contact with the gun fixing member 320. When the handle 360 is further rotated, the fixing projection 352 of the unit fixing member 350 enters the horizontal groove 334 of the gun fixing member 320. In this way, the unit fixing member 350 can be fixed to the gun fixing member 320. Thereafter, the handle 360 is rotated around the handle pin 362, and the handle pin 362 is disposed perpendicularly to the longitudinal axis of the unit fixing member 350 by the rotation restricting portion 366, thereby positioning the handle 360 in the retracted state. By providing the wave washer 380 on the front end surface of the lock collar, the bracket unit 210 can be securely attached to the gun unit 110. By arranging the O-rings at the connection portions of the respective flow paths, the paint and air can be reliably circulated between the bracket unit 210 and the gun unit 110.

  Next, the gun unit 110 of the spray device 100 is fixed to the robot arm 400. Fastening members such as bolts 420 and nuts 422 can be used for this fixing. Alternatively, the bracket unit 210 can be fixed to the gun unit 110 after the gun unit 110 of the spray device 100 is fixed to the robot arm 400. In this case, the connection hose 410 can be coupled to the bracket unit 210 after the bracket unit 210 is fixed to the gun unit 110, or the bracket unit 210 is coupled to the gun unit 110 after the connection hose 410 is coupled to the bracket unit 210. It can also be fixed to.

Next, the working air is sent from the working air supply source to the cylinder chamber 182 through the connection hose 410, the bracket working air flow path 280, and the gun working air flow path 180, and the valve opening / closing device is moved rearward. 150, that is, the needle valve is moved backward. When the nozzle opening / closing valve 150 moves rearward, the paint ejection hole 122 is opened, and the paint can be ejected from the paint ejection hole 122. As the working air, for example, compressed air of about 3 to 4 MPa / cm ² can be used.

At this time, the atomizing air is introduced from the supply source of the atomizing air through the connection hose 410, the bracket atomizing air channel 272, and the gun atomizing air channel 172, and the atomizing air is supplied from the atomizing air hole 124. By ejecting, the paint ejected from the paint ejection hole 122 can be atomized. As the atomizing air, for example, compressed air of about ² MPa / cm ² can be used. The atomization state of the paint can be adjusted by changing the pressure of the atomizing air and the number and arrangement of the atomizing air holes 124.

At the same time, pattern air is introduced from the pattern air supply source via the connection hose 410, the bracket pattern air flow path 274, and the gun pattern air flow path 174, and the pattern air is ejected from the pattern air holes 124. A patterned paint can be formed. As the pattern air, for example, compressed air of about ² MPa / cm ² can be used. The pattern shape of the paint can be adjusted by changing the pressure of the pattern air and the number and arrangement of the pattern air holes 124.

  The remaining paint not ejected from the paint ejection hole 122 can be returned to the paint supply source (or paint tank) via the gun paint return channel 148, the bracket paint return channel 250, and the connection hose 410. In this way, a paint circulation line can be constructed. Alternatively, by using the spray device of the present invention, not only paints but also various liquids such as water, adhesives, rust preventives, insulating agents, coating agents and chemicals can be sprayed automatically or manually. .

  When finishing the painting operation, the supply of the working air is stopped, the valve opening / closing device is moved forward by the spring force of the piston spring 160, and the nozzle opening / closing valve 150, that is, the needle valve is moved forward. When the nozzle opening / closing valve 150 moves forward, the paint ejection hole 122 is closed, and the ejection of paint from the paint ejection hole 122 can be stopped. At the same time, the supply of atomizing air can be stopped and the supply of pattern air can be stopped.

  When the spray gun body is cleaned, when the spray gun body is replaced, or when the nozzle is replaced, the handle 360 is rotated to rotate the fixing projection 352 along the oblique groove portion 330, and the unit fixing member 350 is moved. The unit fixing member 350 can be detached from the gun fixing member 320 by moving in a direction (downward) away from the gun fixing member 320. Next, the bracket unit 210 can be removed from the gun unit 110. Next, the gun unit 110 of the spray device 100 can be detached from the robot arm 400 as necessary. Next, if necessary, the spray gun body can be cleaned, the spray gun body can be replaced, or the nozzle can be replaced.

  Alternatively, the spray device 100 can be detached from the robot arm 400 when the spray gun body is cleaned, when the spray gun body is replaced, or when the nozzle is replaced. Next, by rotating the handle 360, the fixing protrusion 352 is rotated along the oblique groove 330, and the unit fixing member 350 is moved in the direction away from the gun fixing member 320 (downward), and the unit fixing member 350 can be removed from the gun fixing member 320. Next, the bracket unit 210 can be removed from the gun unit 110. Next, if necessary, the spray gun body can be cleaned, the spray gun body can be replaced, or the nozzle can be replaced.

  The spray device of the present invention does not require removal of the connection hose from the spray device when cleaning the spray gun body, replacing the spray gun body, or replacing the nozzle. Therefore, it is possible to reduce the downtime of the painting work when cleaning the spray gun body, replacing the spray gun body, or replacing the nozzle.

(6) Effect of spray device:
When removing the compact automatic gun from the robot arm for maintenance, the spray gun of the conventional product could not be removed from the robot arm until all paint tubes and air tubes were removed. . According to the experiment of the inventors of the present invention, the time required for removing the spray gun and attaching the replacement product is 2 minutes 30 seconds on average (average value of 5 times). ). On the other hand, since the spray device of the present invention can be attached and detached with one touch, the time required for the work from detaching the bracket unit from the gun unit, removing the spray gun and attaching the replacement product on average is from 6 seconds to 7 seconds. Can be completed in seconds. With regard to the working time required to replace such a spray gun, it is known that, for example, an automobile manufacturer causes a great deal of damage if the production line conveyor is stopped for one minute. Therefore, when the spray device of the present invention is used, the work time required for replacing the spray gun can be greatly shortened, so that the occurrence of damage due to the stoppage of the conveyor can be greatly reduced.

  The spray device of the present invention can reduce the downtime when cleaning the spray gun body, replacing the spray gun body, or replacing the nozzle, and can spray paint with a short loss time. it can. Furthermore, the spray device of the present invention can spray not only paints but also various liquids such as water, adhesives, rust preventives, insulating agents, coating agents, and drugs. Since the spray device of the present invention is easy to manufacture and assemble components, it can be manufactured by a simple process.

In embodiment of this invention, it is a longitudinal cross-sectional view which shows the structure of a spray apparatus. In embodiment of this invention, it is a front view which shows the structure of a spray apparatus. In embodiment of this invention, it is a rear view which shows the structure of a spray apparatus. In embodiment of this invention, it is a cross-sectional view in AA of FIG. FIG. 5 is a cross-sectional view taken along line BB in FIG. 4 in the embodiment of the present invention. In embodiment of this invention, it is a cross-sectional view in CC of FIG. In embodiment of this invention, it is a side view which shows the structure of a gun fixing member. FIG. 10 is a partially enlarged view showing a D part of FIG. 9 in the embodiment of the present invention. Here, FIG. 8 (a) is a cross-sectional view of the fixing groove, FIG. 8 (b) is a partial side view, and FIG. 8 (c) is a partial side view seen from a direction perpendicular to (b). FIG. In embodiment of this invention, it is a longitudinal cross-sectional view which shows the structure of a unit fixing member. In embodiment of this invention, it is a front view which shows the structure of a unit fixing member. In embodiment of this invention, it is a figure which shows the structure of a handle | steering-wheel. Here, FIG. 11A is a front view of the handle, FIG. 11B is a side view of the handle, and FIG. 11C is a bottom view of the handle. In embodiment of this invention, it is a top view which shows the state which attached the spray apparatus to the robot arm. It is a side view which shows the state which attached the conventional spray apparatus to the robot arm.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Spray apparatus 110 Gun unit 112 Gun body 114 Nozzle 120 Air cap 122 Paint spray hole 124 Atomization air hole 126 Pattern air hole 130 Retaining ring 134 Baffle 140 Rear housing 142 Adjustment screw 144 Adjustment lock nut 145 Housing seal member 146 Set screw 148 Gun paint return flow path 150 Nozzle on / off valve (needle)
152 Needle lock nut 154 Piston flange 156 Retainer 158 Piston cup 160 Piston spring (spring)
170 Gun paint flow path 172 Gun atomization air flow path 174 Gun pattern air flow path 180 Gun operation air flow path 182 Cylinder chamber 210 Bracket unit 212 Bracket body 250 Bracket paint return flow path 270 Bracket paint flow path 272 Bracket atomization air flow Path 274 Bracket pattern air flow path 280 Bracket operating air flow path 310 Unit fixing device 320 Gun fixing member 350 Unit fixing member 360 Handle

Claims (15)

In a spray device that sprays paint from the paint spray hole provided in the nozzle,
A gun unit for atomizing paint and ejecting it,
A bracket unit for receiving paint and air,
The bracket unit is configured to be detachably fixed to the gun unit,
When the bracket unit is fixed to the gun unit, the paint and air received by the bracket unit are configured to flow to the gun unit.
A spray device characterized by that. The gun unit is
A gun paint flow path for distributing paint,
A gun atomizing air flow path for distributing atomizing air for atomizing the paint;
A nozzle having a paint spray hole provided to flow through the gun paint flow path;
An air cap having an atomizing air hole provided to circulate in the gun atomizing air flow path,
When the paint spray hole is opened, the paint that has passed through the gun paint flow path is ejected from the paint spray hole, and the atomized air is ejected from the atomizing air hole, thereby ejecting the paint from the paint ejecting hole. Configured to be atomized,
The spray device according to claim 1, wherein: The bracket unit is
A bracket paint flow path for distributing paint,
Including a bracket atomizing air flow path for circulating atomized air for atomizing the paint,
The spray device according to claim 1, wherein: The gun unit is
A nozzle opening and closing valve for opening and closing the paint spray hole;
A valve opening and closing device for operating the nozzle opening and closing valve;
A gun operating air flow path for circulating operating air for operating the valve opening and closing device,
The bracket unit is
A bracket operating air flow path for circulating operating air for operating the valve opening and closing device,
When the bracket unit is fixed to the gun unit, the gun working air flow path is configured to flow through the bracket working air flow path,
The spray device according to claim 1, wherein:   The gun unit is provided to circulate with the gun paint channel and has a gun paint return channel for returning paint, and the bracket unit has a bracket paint return channel for returning paint. The spray device according to claim 2, wherein when the bracket unit is fixed to the gun unit, the gun paint return channel flows into the bracket paint return channel.   The gun unit includes a gun pattern air channel for distributing pattern air for forming a pattern of paint ejected from the paint ejection hole, and a pattern provided to circulate in the gun pattern air channel. The bracket unit has a bracket pattern air flow path for circulating pattern air, and the gun pattern air flow path is fixed to the bracket pattern when the bracket unit is fixed to the gun unit. The spray device according to claim 2, wherein the spray device is configured to circulate in an air flow path.   The gun unit includes a gun fixing member for fixing the bracket unit to the gun unit, the gun fixing member has a fixing groove, and the spray device is disposed in the fixing groove. The spray device according to claim 1, further comprising a unit fixing member having a lock fixing portion that can be fixed to the device.   The fixing groove portion is constituted by an oblique groove portion formed obliquely with respect to the longitudinal axis of the gun fixing member, and the unit fixing member is fixed so as to be fitted into the oblique groove portion. The spray device according to claim 7, wherein the spray device has a protruding portion. In the spray device that sprays paint from the paint spray hole of the nozzle,
A gun paint channel for distributing the paint, a gun atomizing air channel for distributing atomized air for atomizing the paint, and a paint jet provided to circulate in the gun paint channel A nozzle having a hole, an air cap having an atomizing air hole provided so as to circulate in the gun atomizing air flow path, a nozzle opening / closing valve for opening / closing the paint ejection hole, and the nozzle opening / closing valve. A gun unit including a valve opening and closing device for operating, and a gun operating air flow path for circulating operating air for operating the valve opening and closing device;
Bracket paint channel for distributing paint, bracket atomizing air channel for distributing atomized air for atomizing paint, and bracket for distributing operating air for operating the valve opening / closing device A bracket unit including a working air flow path,
It is configured so that paint can be introduced from the inlet side end of the bracket paint flow path,
It is configured to be able to introduce working air from the inlet side end of the bracket working air flow path,
The bracket unit is configured to be detachably fixed to the gun unit,
When the bracket unit is fixed to the gun unit, the inlet side end of the gun paint channel is connected to the outlet side end of the bracket paint channel, and the inlet side end of the gun working air channel The part is configured to be connected to the outlet side end of the bracket operating air flow path,
When the nozzle opening / closing valve is operated to open the paint ejection hole, the paint passing through the gun paint flow path is ejected from the paint ejection hole, and the atomization air is ejected from the atomization air hole, whereby the paint Configured to be able to atomize paint ejected from the ejection holes,
A spray device characterized by that.   The spray according to claim 9, wherein the nozzle on-off valve is a needle valve disposed in a gun paint flow path, and a tip end portion of the needle valve is configured to open and close the ejection hole. apparatus.   The spray device according to claim 10, wherein the valve opening / closing device is a piston that is operated by operating air, and a rear end portion of the needle valve is fixed to the piston.   The gun unit is provided to circulate with the gun paint channel and has a gun paint return channel for returning paint, and the bracket unit has a bracket paint return channel for returning paint. The outlet side end of the gun paint return channel is connected to the inlet side end of the bracket paint return channel when the bracket unit is fixed to the gun unit. The spray device according to claim 9.   The gun unit has a gun pattern air flow path for circulating pattern air for forming a pattern of paint ejected from the paint ejection hole, and the bracket unit is a bracket pattern for circulating pattern air. It has an air flow path, and when the bracket unit is fixed to the gun unit, the inlet side end of the gun pattern air flow path is connected to the outlet side end of the bracket pattern air flow path The spray device according to claim 9, wherein:   The gun unit includes a gun fixing member for fixing the bracket unit to the gun unit, the gun fixing member has a fixing groove, and the spray device is disposed in the fixing groove. The spray device according to claim 9, further comprising a unit fixing member having a lock fixing portion that can be fixed to the device.   The fixing groove portion is constituted by an oblique groove portion formed obliquely with respect to the longitudinal axis of the gun fixing member, and the unit fixing member is fixed so as to be fitted into the oblique groove portion. The spray device according to claim 14, further comprising a protrusion for use.

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