KR100559176B1 - Rotary atomizing spraying machine - Google Patents

Abstract

Even if the bell is filled with paint due to clogging of the spray disk of the spray disk, the paint does not penetrate into the space between the paint supply tube and the output shaft of the air motor, and the rotary spray sprayer does not disable the rotation of the output shaft. It is a subject to offer.

And having a cylindrical paint guide member and rotating the bell with the spray disk disposed in front of the paint guide member by an air motor disposed around the paint guide member, passing through the paint guide member. In the rotary spray type spraying machine spraying the sprayed paint forwarded by the bell with the spray disk, the annular recess is formed on the outer surface of the front portion of the paint guide member, and the motor shaft of the air motor and The inner surface corresponding to the said annular recess in the integrated paint stopping member is provided with an annular projection for engaging the annular recess, which can be solved.

Description

ROTORARY ATOMIZING SPRAYING MACHINE}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view when the trigger lever of the rotary spraying sprayer of the embodiment of the present invention is pulled in half;

2 is a side view when the trigger lever of the rotary spray sprayer of the embodiment of the present invention is in a full pulled state;

3 is a side view when the trigger lever of the rotary spraying sprayer of the embodiment of the present invention is in the released state.

Figure 4 is a vertical sectional view of the handle portion and the operation adjustment portion of the rotary spray sprayer of the embodiment of the present invention.

5 is a vertical sectional view of the second valve of the rotary spray sprayer of the embodiment of the present invention with the trigger lever in the released state.

Fig. 6 is a vertical sectional view of the second valve of the rotary spraying sprayer of the embodiment of the present invention with the trigger lever half pulled.

7 is a vertical sectional view of the second valve of the rotary spray sprayer of the embodiment of the present invention with the trigger lever pulled.

8 is a vertical cross-sectional view of the atomizer of the rotary spray sprayer of the embodiment of the present invention.

9 is a front view of a bell and spray disk of an embodiment of the present invention.

10 is a vertical sectional view of a conventional rotary spraying sprayer.

 <Explanation of symbols for the main parts of the drawings>

1: Rotating spray type sprayer 10: Handle part

12: operation control unit 14: spraying unit

20: handle member 22: high pressure air pipe

24: air pipe connector 26: air adjustment knob

27: high pressure air passage 28: first valve

29 first valve adjustment member 30 gun body

32: cam lever 34: trigger lever

37: second valve 38: paint supply pipe

48: middle end 49: cam pin

50: second valve connecting member 52: front end

60: operation projection 70: paint discharge amount adjustment knob

72: shaping air adjustment knob 76: third valve

78: third adjustment valve member 80: fourth valve

200: paint guide member 204: motor shaft

206: bell 210: annular recess

214: paint stop ring 220: annular protrusion

222: paint guide member 224: inclined spray hole

226: spray groove 228: spray disk

230: manifold

The present invention relates to a rotary spraying sprayer, and more particularly a rotary spraying sprayer capable of stable atomizing over a long period of time.

The rotary spraying sprayer atomizes the paint using the centrifugal force of the rotating bell type member, and uses low pressure air to uniformly and efficiently direct the mist-like paint particles to the coating. In order to spray the sprayed paint particles on the target at higher speed, electrostatic coating is applied to the paint by the corona emitted from the edge of a rotating body such as a bell to use the electrostatic charge. Rotary spray sprayers are characterized by good arrival efficiency (more than about 80%).

As shown in FIG. 10, the atomizer 314 of the conventional rotary spraying sprayer includes an outer shape ring 355, an inner shape ring 357, and a bell 359. The primary assembly 365 composed of the air motor 361 uses a screw 361a formed in a concave portion of the rear end surface of the air motor 361 so as to have an outer circumferential screw of the tip portion of the gun body 303. By screwing to 303b, the primary assembly 365 is mounted to the gun body 303.

The air motor 361 includes a case 369 made of an insulating plastic material surrounding the motor body 367, and a bell 359 is attached to the distal end of the output shaft 371 of the motor body 367. have. This output shaft 371 is comprised with the metal hollow shaft, and the paint supply tube 363 is arrange | positioned coaxially and spaced in this hollow output shaft 371. The rear end of the output shaft 371 projects slightly rearward from the motor body 367, and the output shaft 371 is positioned with respect to the paint supply tube 363 using a screw formed on the outer circumferential surface of the projecting portion 371a. The gap holding member 373 is screwed on.

The plastic case 369 of the air motor 361 is formed with a first internal passage 375 communicating with the first air port 325 and a second internal passage 377 communicating with the motor body 367. . The first inner passage 375 is a shape formed by the annular inlet 375a facing the outlet of the first air port 325 and the outer ring 355 and the inner ring 357 in cooperation. It has an annular outlet 375b which opens in the shaping passage 379.

In addition, the second inner passage 377 has an annular inlet 377a located adjacent to the holding member 363b of the paint supply tube 363. The holding member 363b of the paint supply tube 363 is formed with a plurality of through holes 363d extending along an axis to its outer peripheral portion, and the plurality of through holes 363d are spaced apart from each other in the circumferential direction. have. This holding member 363b is fixed to the gun body 303 by the spiral 363a.

The series of paths passing from the first air port 325 to the shaping passage 379 via the first inner passage 375 constitutes a shaping air passage, and pressurized air passing through the shaping passage is It discharges from the clearance of the front-end | tip part of the shape ring 355 and the internal shape ring 357. In addition, the air motor 361 is driven by the pressurized air introduced from the second air port 327 to the second inner passage 377, whereby it is attached to the bell 359 and the plurality of inclined spray holes. The spray disk 359b which has 359a rotates at high speed (for example, refer patent document 1).

Another prior art rotary spraying sprayer is intended to prevent the bearings from squeezing due to the interruption of the bearing air when the turbine is being driven, and if sufficient bearing air is not supplied to the bearing air chamber. A structure has been proposed in which an air shuttle assembly prevents the inflow of air into a turbine and stops rotation of the rotating portion (see Patent Document 2, for example).

Patent Document 1: Japanese Patent Application Laid-Open No. 2001-205143.

Patent Document 2: Japanese Patent Application Laid-Open No. 10-103649.

In the above-described conventional rotary spraying sprayer, when the injection hole 359a of the spray disk 359d attached to the bell 359 is blocked and the paint is filled in the bell 359, the paint is supplied to the paint supply tube 363. ) May enter the space between the output shaft 371 of the air motor 361 and reach the motor body 367. When the paint dries and solidifies, the rotation of the output shaft 371 becomes impossible. In order to remove the solidified paint so that the output shaft 371 can be rotated again, the atomizer 307 is disassembled to dissolve dry paint between the paint supply tube 363 and the output shaft 371 of the air motor 361. It is necessary to remove. This operation is extremely troublesome and reduces the painting work efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art rotary spraying sprayer, and even if the paint is filled in the bell due to clogging of the spray hole of the spray disk attached to the bell, the paint is supplied with the paint supply tube. An object of the present invention is to provide a rotary spraying sprayer which does not penetrate into the space between the output shafts of the air motors and does not disable the rotation of the output shaft.

It is also an object of the present invention to provide a rotary spraying sprayer which is less wearable, has high durability, and can maintain a predetermined function over a long period of time, which blocks the space between the paint supply tube and the output shaft of the air motor.

The invention has a cylindrical paint guide member, and is configured to rotate a bell with a spray disk disposed in front of the paint guide member by an air motor disposed around the paint guide member. In the rotary spray type spraying machine which sprays the paint discharged forward through the member by the bell with the rotating spray disk, an annular recess is formed in the outer surface of the front part of the said paint guide member, and the said air motor The annular projection which engages with the said annular recessed part is provided in the inner surface corresponding to the said annular recessed part in the paint stop member integrated with the motor shaft of the rotary spraying type spraying machine characterized by the above-mentioned.

Embodiments of the present invention are as follows.

The coating stop member is made of a synthetic resin, characterized in that the cross section of the annular projection has a shape having a thin end. This configuration makes it easy to manufacture and assemble parts and does not require precise adjustment, and has the effect of maintaining the original adjustment state for a long time.

In addition, the paint stop member is characterized by having a plurality of annular projections. By such a configuration, it is possible to obtain the effect of stopping the paint efficiently even though it is a simple structure.

(Example)

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Whole composition

1 is a side view of a rotary spraying sprayer of an embodiment with the trigger lever in a half pulled state. 2 is a side view of the rotary spray sprayer of the embodiment where the trigger lever 34 is in a nearly full pulled state. 3 is a side view of the rotary spraying sprayer of the embodiment in which the trigger lever is in an released (rested) state. 4 is a vertical sectional view of the handle portion and the operation adjustment portion of the rotary spraying sprayer of the embodiment. 8 is a vertical sectional view of the atomizer of the rotary atomizer sprayer of the embodiment. 9 is a front view of the bell and spray disk of the embodiment.

As shown in FIG. 1, the rotary spraying sprayer 1 has a handle portion 10, an operation control unit 12 positioned above the handle unit 10, and a front of the operation control unit 12. It consists of a spray unit 14 located at the stage.

Trigger mechanism configuration

The handle portion 10 includes an air pipe connector 24 for attaching a high pressure air pipe 22 communicated with a compressor (not shown) to a lower end portion of the handle member 20, and in the rotary spraying sprayer 1. An air adjusting knob 26 is installed to adjust the pressure of the high pressure air used in the home. As shown in FIG. 4, the air adjusting knob 26 displaces the first valve adjusting member 29 of the first valve 28 installed in the high pressure air passage 27 in communication with the air pipe connector 24. The opening / closing state of the first valve 28 is adjusted.

The operation adjustment part 12 is a paint material connected to a trigger lever 34 that axially supports the gun body 30 and the cam lever 32, a hook 36, and a paint tank (not shown) at the center part. It has a paint pipe connector 40 to which the feed pipe 38 is attached. The cam lever 32 is urged by the spring member 33 to rotate in the counterclockwise direction in FIG. 1.

As shown in FIG. 4, the trigger lever 34 is axially supported by the trigger lever point member 35 on the gun body 30. The second valve connecting member 50 of the second valve 37 disposed downstream of the first valve 28 of the high pressure air passage 27 abuts on the middle portion of the trigger lever 34. have. The second valve 37 has a compression spring 39 and applies a force to swing the trigger lever 34 forward. As for the 2nd valve 37, the 2nd valve adjustment member 51 is displaced by the 2nd valve connection member 50, and the opening-closing state is adjusted.

In the half pulled state of the trigger lever 34 shown in FIG. 1, the high pressure air is supplied to the air motor 202 mentioned later, and the bell 206 is rotated. The half pulled state of the trigger lever 34 is locked by engaging the intermediate end 48 of the cam 32C of the cam lever 32 with the cam pin 49 secured to the gun body 30. .

In the pulled-up state of the trigger lever 34 shown in FIG. 2, high pressure air is supplied, the bell 206 rotates, paint is supplied, atomized, and is injected from the bell 206. FIG. The pull pulled state of the trigger lever 34 for spraying the paint pulls the trigger lever 34 against the bias force of the second valve connecting member 50 and the cam pin. 49 is formed in engagement with the front end 52 of the cam 32C. The amount of spraying of paint can be adjusted by adjusting the trigger lever 34 so that the cam pin 49 may be in any position between the intermediate end 48 and the front end 52 of the cam 32C.

In order to set the trigger lever 34 to the released state, that is, the resting position (home position), the operation projection 60 of the cam lever 34 is moved by the operator in the half pulled state of the trigger lever 34 shown in FIG. 1. The cam lever 32 is rotated clockwise by pressing with a thumb (not shown). As a result, the cam pin 49 moves from the upper middle portion 62 of the cam 32C to the rear end portion 64, and the trigger lever 34 without the cam lever 32 being restrained is shown in FIG. It will be in the state of the release shown.

In the upper rear part of the operation adjustment part 12, the coating material discharge amount adjustment knob 70 and the safe air adjustment knob 72 are provided. As shown in FIG. 4, the paint discharge amount adjusting knob 70 is triggered with the third adjustment valve member 78 of the third valve 76 disposed in the paint passage 74 communicating with the paint pipe connector 40. The positional relationship of the lever 34 is changed. Therefore, by rotating the paint discharge amount adjusting knob 70, the supply amount of the paint in the state where the trigger lever 34 is pulled, that is, the spray amount can be adjusted.

The shaping air adjustment knob 72 displaces the fourth adjustment valve member 82 of the fourth valve 80 disposed on the downstream side of the second valve 37 of the high pressure air passage 27 so that the fourth valve ( Adjust the open / closed state of 80).

Configuration of the second valve

In the general painting operation, even if the load of the bell 206 for spraying the paint increases or decreases due to a change in the supply of the paint to the rotating bell 206, the rotation speed of the bell 206 is preferably constant. In order to realize this, the second valve 37 has a double valve structure.

5 is a vertical sectional view of the second valve of the rotary spraying sprayer of the embodiment with the trigger lever in the released state. 6 is a vertical sectional view of the second valve of the rotary spray sprayer of the embodiment with the trigger lever in a half pulled state. 7 is a vertical sectional view of the second valve of the rotary spraying sprayer of the embodiment, with the trigger lever pulled up.

As shown in FIGS. 5 to 6, the second valve 37 is formed by arranging the cylindrical valve 100 and the cone valve 102 in series in the high pressure air passage 27. The cylindrical valve 100 has a cylindrical color member 104 having an outer diameter l1 fixed to the second valve connecting member 50 and a cylindrical shape having an inner diameter l2 larger than, for example, 0.6 mm larger than the diameter l1 of the cylindrical color member 50. It has the hole 106 and has the color receiving member 110 in which the air discharge hole 108 was provided. The cylindrical valve 100 can adjust the passage amount of high pressure air, ie, the pressure loss of high pressure air, by the overlap state of the cylindrical color member 104 and the cylindrical hole 106. In the released state (FIG. 5) and the half pulled state (FIG. 6) of the trigger lever 34, the pressure loss of the high pressure air by the cylindrical valve 100 is large, and both pressure loss is substantially the same. In comparison with this, in the pulled state of the trigger lever 34 (FIG. 7), the pressure loss by the cylindrical valve 100 of high pressure air becomes small.

The conical valve 102 has a conical valve member 124 that is secured to the second valve connecting member 50 in a conical shape with a receiving member 122 having a conical hole 120 and engages in the conical hole 120. The shape of the receiving member 122 is determined such that the receiving member 122 and the conical valve member 124 are in line contact.

In the release state (FIG. 5) of the trigger lever 34, the conical valve member 124 abuts on the contact part 130 of the receiving member 122, and the cone valve 102 is completely closed. . In the half pulled state of the trigger lever 34 (FIG. 6), a small clearance is created between the contact part 130 of the receiving member 122 and the conical valve member 124, and high pressure air passes. If this clearance exceeds about 0.3 mm, the pressure loss of the high pressure air by the cone valve 102 becomes almost zero. In the pull pulled state of the trigger lever 34 (FIG. 7), a large gap is formed between the contact portion 130 of the receiving member 122 and the conical valve member 124 so that the high pressure air passes without pressure loss.

The second valve 37 may be configured to increase or decrease the rotational speed of the bell 206 with the increase of the supply amount of paint by adjusting the cylindrical valve 100 and the cone valve 102. Do.

Composition of the spray apparatus

As illustrated in FIG. 8, the spray unit 14 is disposed on the center of the paint guide member 200, which is rotatably fixed to the operation adjusting unit 12, and the motor shaft 204 of the air motor 202. Has a bell 206 fixed. The paint guide member 200 is substantially pipe-shaped, but an annular recess 210 is formed on the front side. On the other hand, a paint stop ring 214 made of synthetic resin is attached to the inside of the front end of the motor shaft 204. The paint stop ring 214 is provided with a double annular projection 220 which is in light contact with the annular recess 210 of the paint guide member 200. The bell 206 screwed to the distal end of the motor shaft 204 has a paint guide member 222 to allow the paint to flow well, and as shown in FIG. The hole 224 is provided, and the spray disk 228 which provided four injection grooves 226 in the periphery part is provided.

The spray unit 14 is furthermore attached to the operation control unit 12 to form a shape of the latter half of the spray unit 14 and a manifold 230 screwed to the tip of the manifold 230 to spray It has the outer shape case 234 which forms the external shape of the front half part of the part 14. As shown in FIG. An inner case 236 is disposed between the bell 206 and the outer shaped case 234.

The manifold 230 is the same as the turbine air passage 242 which sends the high pressure air of the high pressure air passage 27 downstream of the fourth valve 80 to the turbine 240 of the air motor 202. It has a shaping air passage 244 for directing air between the bell 206 and the inner case 236.

Operation method

When not in use, the rotary spraying sprayer of the present invention has the trigger lever 34 shown in FIG. 3 in a released state, and is suspended on a wall or the like using the hook 36.

In use, if necessary, the air adjusting knob 26 and the shaping air adjusting knob 72 are operated to obtain the desired high pressure air.

Next, the trigger lever 34 is pulled to the half pulled state shown in FIG. At this time, the cam lever 32 also moves together, the cam pin 49 reaches the upper end 62 from the rear end 64 of the cam 32C, and the cam lever 32 is counterclockwise. Rotate to reach the intermediate end 48. As a result, the second valve 37 is released, the high pressure air is supplied to the turbine air passage 242 and the shaping air passage 244 so that the motor shaft 204 and the bell 206 rotate at high speed, and the bell ( High pressure air is injected between 206 and inner case 236 and between inner case 236 and outer shaped case 234. At this time, the 3rd adjustment valve member 78 is closed, and paint is not supplied to the paint guide member 200 side.

Next, the desired amount of paint is supplied to the paint guide member 200 side by pulling the trigger lever 34 to start spraying the paint. The spray amount and spray shape of the paint are adjusted according to the pulled state of the trigger lever 34.

When stopping spraying, the pulling of the trigger lever 34 is stopped and it is set as the half pulled state shown in FIG. In this state, high pressure air is supplied to the turbine air passage 242 and the shaping air passage 244 as described above, the motor shaft 204 and the bell 206 are rotated at high speed, and the bell 206 and the interior thereof are rotated. High pressure air is injected between the cases 236 and between the inner case 236 and the outer shaped case 234. Therefore, spraying can be started easily from this state.

In order to completely stop the painting operation, the release operation, that is, the cam lever 32 is rotated clockwise by pressing the operation projection 60 of the cam lever 34 by the operator's thumb (not shown). As a result, the cam pin 49 is moved from the upper end 62 of the middle end of the cam 32C to the rear end 64, and the trigger lever in which the cam lever 32 is not restrained is released in FIG. 3. It becomes

According to the present invention, even if the paint is filled in the bell by the injection hole of the spray disk attached to the bell or the like, the paint does not enter the space between the paint supply tube and the output shaft of the air motor, thereby making it impossible to rotate the output shaft. You can get the effect that you do not do.

According to the present invention, furthermore, the rotary spraying type which has low wear, high durability, and can maintain a predetermined function over a long period of time, is disposed at a location where a member rotation radius blocking a space between the paint supply tube and the output shaft of the air motor is small. It has the effect that a sprayer can be constructed.

Claims (3)

And having a cylindrical paint guide member and rotating the bell with the spray disk disposed in front of the paint guide member by an air motor disposed around the paint guide member, passing through the paint guide member. In the rotary spraying sprayer spraying by the bell with the spray disk to rotate the paint discharged forward by An annular recess is formed on an outer surface of the front portion of the paint guide member, and an annular projection is engaged with the annular recess on an inner surface corresponding to the annular recess in the paint stop member integral with the motor shaft of the air motor. Rotary spray type sprayer, characterized in that installed. The method of claim 1, The coating stop member is made of a synthetic resin, characterized in that the cross section of the annular projection has a shape having a narrow end. The method according to claim 1 or 2, And said paint stop member has a plurality of annular projections.

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