JP2012045452A - Cleaning apparatus and method of adjusting position of nozzle in the cleaning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of easily carrying out the alignment of the center axis of a cleaning nozzle with a part to be cleaned.SOLUTION: A connection means 57 comprises: a plurality of pin holes 61-68 provided in a support block 53 to surround a support hole 52; and a pin 71 projected from a rotary block 53 to fit into one of the pin holes 61-68. By connecting the pin 71 with the pin hole changed from the pine hole 61 to the pin hole 62, the cleaning nozzle 25 is moved to follow an arrow (1). In the same way, by connecting the pin 71 with the pin hole changed from the pin hole 62 to each of adjacent pin holes 63-68, the cleaning nozzle 25 goes round around a rotation center 54. Because the position of the cleaning nozzle is adjusted only by rotating the rotary block to be fixed to the support block, the alignment of the center axis of the cleaning nozzle with the part to be cleaned can be easily carried out.

Description

  The present invention relates to an improvement in a coating gun cleaning technique that uses a rotary atomizing head as a cleaning target.

  For example, depending on the product to be painted, a plurality of types of paints may be discharged with a single painting gun. In order to remove the paint remaining on the paint gun when switching the type of paint, a technique for cleaning the head provided at the tip of the paint gun has been proposed (see, for example, Patent Document 1 (FIG. 4)).

The technique of this patent document 1 is demonstrated below based on drawing.
FIG. 9 is a diagram for explaining the basic principle of the cleaning device according to the prior art. The cleaning device 101 of the coating gun 100 is provided with a lid 102 on the upper part of the cover covering the whole, and a rubber made near the center of the cover 102 The insertion guide member 103 is provided. A head 104 for spraying paint is provided at the tip of the paint gun 100 attached to the paint robot.
The head 104 of the coating gun 100 is inserted into the insertion guide member 103.

  In addition, at the end of the paragraph number [0028] of Patent Document 1, “Because the insertion guide member 24 is made of rubber, it is easily elastically deformed even if the insertion position of the coating gun 7 is slightly shifted. Is described.

That is, the conventional technique is based on the premise that the insertion position of the coating gun 100 is slightly shifted.
However, if the insertion position of the coating gun 100 is shifted, the paint discharge hole of the head 104 and the central axis of the cleaning nozzle 105 are shifted, and the cleaning liquid discharged from the cleaning nozzle 105 cannot efficiently enter the paint discharge hole, and the head The cleaning efficiency for cleaning the paint remaining in the paint reservoir on the back side of 104 becomes worse.

  Therefore, it is necessary to accurately align the central axis of the cleaning nozzle 105 and the head 104 as the portion to be cleaned, but it is difficult and troublesome to perform alignment by teaching the coating robot. That is, there is a demand for a technique that can easily align the central axis of the cleaning nozzle with the portion to be cleaned.

Japanese Patent Laid-Open No. 9-262518

  An object of the present invention is to provide a technique capable of easily aligning a central axis of a cleaning nozzle and a portion to be cleaned.

  In the invention according to claim 1, the part to be cleaned that needs to be cleaned with the cleaning liquid is provided to be movable to the cleaning apparatus, and the cleaning apparatus is provided with a cleaning nozzle that discharges the cleaning liquid to the part to be cleaned. In the cleaning apparatus, the position of the cleaning liquid discharged from the cleaning nozzle is shifted with respect to the position of the portion to be cleaned. The nozzle position adjustment mechanism includes a support block provided in the cleaning device and provided with a support hole extending in the axial direction of the cleaning nozzle, and the cleaning position at a position offset from a rotation center and rotatably accommodated in the support hole. A rotation block provided with a nozzle insertion hole for passing a nozzle, and a connection for connecting the rotation block to the support block at an arbitrary rotation direction of the rotation block Wherein the stage, in that it consists of.

  In the invention according to claim 2, the connecting means protrudes from the rotating block so as to fit into one of the plurality of pin holes provided in the support block so as to surround the support holes. And a pin.

  In the invention according to claim 3, the connecting means protrudes from the support block so as to fit into one of the plurality of pin holes provided in the rotary block so as to surround the nozzle insertion hole. It is characterized by consisting of the pin which was made.

  In the invention according to claim 4, the part to be cleaned that needs to be cleaned with the cleaning liquid is provided movably to the cleaning apparatus, the cleaning apparatus is provided with a cleaning nozzle that discharges the cleaning liquid to the part to be cleaned, and the cleaning Method for adjusting the position of a nozzle in a cleaning apparatus, wherein the position of the cleaning liquid discharged from the cleaning nozzle is shifted from the position of the portion to be cleaned in the apparatus provided with a nozzle position adjustment mechanism for adjusting the positional shift A support block provided in the cleaning device and provided with a support hole extending in the axial direction of the cleaning nozzle, and a nozzle insertion hole through which the cleaning nozzle is passed in a position that is rotatably accommodated in the support hole and offset from the rotation center A rotating block provided with a connecting means for connecting the rotating block to the support block at an arbitrary rotational orientation of the rotating block; The step of stopping when the distance to the cleaning nozzle becomes the smallest, the step of rotating the rotating block to adjust the direction in which the cleaning nozzle is directed, and the connecting means connecting the rotating block to the support block The process is characterized by comprising the steps of:

  In the invention according to claim 1, the rotary block is provided with a nozzle insertion hole through which the cleaning nozzle is passed at a position that is rotatably accommodated in the support hole and is offset from the rotation center. Since the position of the cleaning nozzle is adjusted simply by rotating the rotating block and fixing it to the support block, the center axis of the cleaning nozzle and the portion to be cleaned can be easily aligned.

  In the invention according to claim 2, the connecting means protrudes from the rotating block so as to fit into one of the plurality of pin holes provided in the support block so as to surround the support holes. And consists of a pin. Since the component configuration is simple, the component cost can be reduced.

  In the invention according to claim 3, the connecting means protrudes from the support block so as to fit into one of the plurality of pin holes provided in the rotary block so as to surround the nozzle insertion hole. Made up of pins. Since it is easy to process the pin hole on the rotating block, the processing cost of the parts can be reduced.

  In the invention which concerns on Claim 4, the process of preparing a support block, a rotation block, and a connection means, the process of moving a to-be-cleaned part, and stopping when the distance with a washing nozzle becomes the minimum, and rotating a rotation block And adjusting the direction in which the cleaning nozzle is directed, and connecting the rotating block to the support block by the connecting means.

In the step of adjusting the direction in which the cleaning nozzle is directed, it is only necessary to rotate the rotating block. Since the rotation operation is easy, the position of the cleaning nozzle can be easily adjusted.
In addition, compared with the process of teaching the painting robot, the present invention only needs to rotate the rotating block, so that the time required for alignment is shortened.

It is a figure explaining the usage example of the washing | cleaning apparatus of the coating gun which concerns on this invention. It is sectional drawing of the washing | cleaning apparatus of the coating gun which concerns on this invention. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. It is a figure explaining the positional relationship of a to-be-cleaned part and a washing nozzle. It is a front view of a nozzle position adjustment mechanism. It is a perspective view of a nozzle position adjustment mechanism. It is an effect | action figure of a nozzle position adjustment mechanism. It is a figure explaining the example of a change of FIG. It is a figure explaining the basic principle of the prior art.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

First, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the painting facility 10 includes a painting machine 11 and a painting gun cleaning device 20.
The coating machine 11 includes a fixed portion 12, an industrial robot 13 provided on the upper portion of the fixed portion 12, and a coating gun 15 provided at the tip of the arm portion 14 of the industrial robot 13.

  The coating gun cleaning device 20 is attached to the side wall 16 of the fixed portion 12 via a stay 17. A cleaning liquid pan 18 for receiving the cleaning liquid after cleaning is disposed below the cleaning device 20 for the coating gun.

Next, the coating gun cleaning device 20 will be described with reference to cross-sectional views.
As shown in FIG. 2, the coating gun cleaning device 20 includes a cylindrical container 21 into which the coating gun 15 can be inserted downward from above, and a nozzle provided on the inner peripheral surface 22 of the cylindrical container 21. A stay 23, a cleaning nozzle 25 attached to the nozzle stay 23 via a nozzle position adjusting mechanism 24 and discharging a cleaning liquid, a cleaning liquid pan 18 provided at the lower part of the cylindrical container 21 and receiving the cleaning liquid after cleaning, Consists of. By spraying the cleaning liquid from the cleaning nozzle 25, it is possible to clean the rotary atomizing head 26 as a portion to be cleaned that is rotatably provided at the tip of the coating gun 15.

  Further, a splash preventing member 27 that causes the cleaning liquid sprayed from the cleaning nozzle 25 to fall into the cylindrical container 21 when the cleaning liquid does not hit the coating gun 15 is placed on the central axis 28 of the cleaning nozzle 25. It is attached to the cylindrical container 21. Thereby, it is possible to prevent the cleaning liquid from being scattered outside.

Next, the outer surface cleaning nozzle will be described.
As shown in FIG. 3, the coating gun cleaning device 20 includes an outer surface cleaning nozzle that injects a cleaning liquid onto an outer surface 33 of a rotary atomizing head 26 via an outer surface nozzle stay 32 on an outer peripheral surface 31 of a cylindrical container 21. 34 is attached. The outer surface cleaning nozzle 34 extends through the through hole 35 of the cylindrical container 21 to the inside of the cylindrical container 21. The outer surface cleaning nozzle 34 is provided so that the outer surface 33 of the rotary atomizing head 26 is disposed on the shaft 36 of the outer surface cleaning nozzle 34. Thereby, the outer surface 33 of the rotary atomizing head 26 can be cleaned. The cleaning liquid after cleaning flows down in the cylindrical container 21 and is collected in the cleaning liquid pan 18.

Next, the shape of the rotary atomizing head 26 will be described.
As shown in FIG. 4, the rotary atomizing head 26 is rotatably provided at the tip of the coating gun 15. A central paint discharge hole 41 for discharging paint is provided in the vicinity of the rotary shaft 37 of the rotary atomizing head 26, and an outer paint discharge hole for discharging the paint while being inclined so as to have a conical shape with respect to the rotary shaft 37. 42.

The rotary atomizing head 26 includes an outer member 43, an inner member 45 that forms a paint reservoir 44 as a back side of the rotary atomizing head 26, and a paint feed tube that guides the paint to the outer member 43. 46.
The paint reservoir 44 has a bell shape, and the side wall 47 of the paint reservoir is smoothly connected to the outer paint discharge hole 42. Thereby, a coating material can be discharged smoothly.

In the cleaning nozzle 25, the central axis 28 of the cleaning nozzle overlaps the central axis 48 of the outer paint discharge hole 42. Even if the cleaning liquid is flowed from the paint feed tube, it takes time to clean the paint reservoir side wall 47. However, if the cleaning liquid flows smoothly from the cleaning nozzle 25 into the outer paint discharge hole 42, the paint reservoir side wall 47 can be made efficient. Can be cleaned well.
The central axis 28 of the cleaning nozzle forms an angle α with respect to the rotation axis 37. The portion of the cleaning liquid discharged from the cleaning nozzle 25 that does not flow into the outer paint discharge hole 42 cleans the bottom surface 51 of the rotary atomizing head 26.

Next, the position adjusting mechanism 24 of the nozzle 25 will be described.
As shown in FIG. 5, in the position adjustment mechanism 24 of the nozzle 25, a support block 53 provided with a support hole 52 extending in the axial direction of the cleaning nozzle 25 is provided in the cleaning device (FIG. 1, reference numeral 20). And a nozzle stay 23. A rotation block 56 having a nozzle insertion hole 55 through which the cleaning nozzle 25 is passed is housed in a position offset from the rotation center 54 of the support hole 52 so as to be rotatable. The central axis 28 of the cleaning nozzle is offset from the rotation center 54 by a distance L.

  The support block 53 and the rotation block 56 are provided with connecting means 57 for connecting the rotation block 56 to the support block 53 in an arbitrary rotation direction of the rotation block 56. The rotating block 56 is housed in the support block 53 and connected by connecting means 57 and fastened by a nut 58.

Next, the connecting means 57 will be described.
As shown in FIG. 6, the connecting means 57 is fitted into a plurality of pin holes 61 to 68 provided in the support block 53 so as to surround the support hole 52 and one of these pin holes 61 to 68. It consists of a pin 71 protruding from the rotary block 56 so as to fit. By changing the pin 71 from the pin hole 61 to the pin hole 62 and connecting them, the cleaning nozzle 25 moves as indicated by the arrow (1). Similarly, by changing the pin 71 from the pin hole 62 to the adjacent pin holes 63 to 68 and connecting them, the cleaning nozzle 25 goes around the rotation center 54. The distance between the center axis 28 of the cleaning nozzle and the rotation center 54 is L.

The operation of the nozzle position adjusting mechanism 24 described above will be described next.
As shown in FIG. 7, the pin 71 is fitted in the pin hole 61. When the rotary atomizing head 26 rotates, the outer paint discharge hole 42 moves on the track indicated by the arrow (2). When the cleaning liquid is discharged from the cleaning nozzle 25 to the rotary atomizing head 26 serving as the portion to be cleaned, the position of the cleaning nozzle 25 is shifted with respect to the position of the outer paint discharge hole 42 of the rotary atomizing head 26 indicated by the arrow (2). ing.

  Therefore, the pin 71 is replaced with the pin hole 62 as shown by the arrow (3). The cleaning nozzle 25 moves to the position of the cleaning nozzle 25 indicated by an imaginary line as indicated by an arrow (4). Similarly, the pin 71 is fitted into the pin hole 62 at a position where the deviation is minimized. That is, the position of the cleaning nozzle 25 is adjusted by rotating the rotating block (56 in FIG. 6) so that the cleaning nozzle 25 is directed to the outer paint discharge hole 42 of the cleaned portion 26. When the cleaning nozzle 25 is directed to the outer paint discharge hole 42 of the portion to be cleaned 26, the rotating block 56 is connected to the support block 53 by the connecting means 57. As a result, the cleaning nozzle 25 is positioned on the outer paint discharge hole 42 and the cleaning liquid can efficiently enter the outer paint discharge hole 42.

Next, another embodiment of FIG. 6 will be described. In addition, the same code | symbol is attached about the same structure as the structure shown in FIG. 6, and detailed description is abbreviate | omitted.
As shown in FIG. 8, the connecting means fits into one of these pin holes 72 to 79 and a plurality of pin holes 72 to 79 provided in the rotary block 56 so as to surround the nozzle insertion hole 55. The pin 81 protrudes from the support block 53.

The effects of the cleaning device 20 described above will be described below.
As shown in FIG. 6 above, a portion to be cleaned (FIG. 4, reference numeral 26) that needs to be cleaned with the cleaning liquid is provided to be movable to the cleaning apparatus (FIG. 1, reference numeral 20). A cleaning nozzle 25 that discharges the cleaning liquid to the cleaning target 26 is provided, and this positional shift is adjusted when the position of the cleaning liquid discharged from the cleaning nozzle 25 is shifted from the position of the cleaning target 26 in the cleaning device 20. In the cleaning apparatus 20 provided with the nozzle position adjusting mechanism 24, the nozzle position adjusting mechanism 24 is attached to the inner peripheral surface 22 of the cylindrical container 21 via the nozzle stay 23 in the axial direction of the cleaning nozzle 25. A support block 53 provided with an extended support hole 52 and a nozzle insertion hole 55 through which the cleaning nozzle is passed are provided in a position that is rotatably accommodated in the support hole 52 and offset from the rotation center 54. A rotary block 56, and the connecting means 57 for connecting the rotating block 56 to support block 53 in any rotational orientation of the rotation block 56, made of.

  With this configuration, the position of the cleaning nozzle 25 is adjusted simply by rotating the rotating block 56 and fixing the rotating block 56 to the support block 53. Therefore, the positions of the central axis 28 of the cleaning nozzle 25 and the outer paint discharge hole 42 of the portion 26 to be cleaned are adjusted. Matching can be performed easily.

As shown in FIG. 6, the connecting means 57 includes a plurality of pin holes 61 to 68 provided in the support block 53 so as to surround the support hole 52, and one of these pin holes 61 to 68. And a pin 71 protruding from the rotary block 56 so as to be fitted with the pin.
With this configuration, the component configuration is simple, so that the component cost can be reduced.

As shown in FIG. 8, the connecting means 57 includes a plurality of pin holes 72 to 79 provided in the rotary block 56 so as to surround the nozzle insertion hole 55, and one of these pin holes 72 to 79. It may consist of pins 81 protruding from the support block 53 so as to fit together.
With this configuration, the processing of the pin holes 72 to 79 in the rotating block 56 is easy, so that the processing cost of the parts can be reduced.

  As shown in FIG. 7, the portion 26 to be cleaned that needs to be cleaned with the cleaning liquid is provided so as to be movable to the cleaning device (reference numeral 20 in FIG. 1). And a nozzle position adjusting mechanism 24 that adjusts the positional deviation when the position of the cleaning nozzle 25 is deviated from the position of the portion 26 to be cleaned. This is a method for adjusting the position of the nozzle in the cleaning device 20, which is provided in the cleaning device 20, provided with a support hole 52 extending in the axial direction of the cleaning nozzle 25, and rotatably accommodated in the support hole 53. The rotation block 56 is provided with a nozzle insertion hole 55 through which the cleaning nozzle 25 is passed at a position offset from the rotation center 54, and the rotation block 56 is rotated at an arbitrary rotation direction. A step of preparing a connecting means 57 for connecting the hook 56 to the support block 53, a step of moving the portion to be cleaned 26 and stopping it when the distance from the cleaning nozzle 25 becomes the smallest, and a rotating block 56 And the position of the cleaning nozzle 25 is adjusted so that the cleaning nozzle 25 is directed to the portion to be cleaned 26, and when the cleaning nozzle 25 is directed to the portion to be cleaned 26, the connecting block 57 supports the rotary block 56. And a step of connecting to 53.

Thereby, in the process of aligning the position of the cleaning nozzle 25, it is only necessary to rotate the rotary block 56. Since the rotation operation is easy, the position of the cleaning nozzle 25 can be easily adjusted.
Further, compared with the process of teaching the painting robot, the present invention only requires the rotating block 56 to be rotated, and therefore the time required for alignment is shortened.

  The painting gun cleaning technology according to the present invention is applied to an industrial robot and applied to a painting gun. However, the present invention is not limited to this, and other coating guns may be used as long as the rotary atomizing head of the painting gun is washed. It can be applied.

  The cleaning device and the nozzle position adjustment method of the present invention are suitable for cleaning a coating gun whose rotary atomizing head is to be cleaned.

  DESCRIPTION OF SYMBOLS 10 ... Painting equipment, 15 ... Painting gun, 20 ... Coating gun washing | cleaning device, 24 ... Nozzle position adjustment mechanism, 25 ... Cleaning nozzle, 26 ... To-be-cleaned part (rotating atomizing head), 42 ... Outer coating material discharge hole, 52 ... Support hole, 53 ... Support block, 54 ... Rotation center, 55 ... Nozzle insertion hole, 56 ... Rotation block, 57 ... Connecting means, 61-68 ... Pin hole, 71 ... Pin, Pin hole ... 72-79 ... Pin Hole, 81 ... pin

Claims (4)

A portion to be cleaned that needs to be cleaned with the cleaning liquid is provided to be movable to the cleaning device, a cleaning nozzle that discharges the cleaning liquid to the target cleaning portion is provided in the cleaning device, and the target cleaning portion is provided in the cleaning device. In a cleaning apparatus provided with a nozzle position adjustment mechanism that adjusts this positional shift when the position of the cleaning liquid discharged from the cleaning nozzle is shifted with respect to the position of
The nozzle position adjusting mechanism is:
A support block provided in the cleaning device and provided with a support hole extending in the axial direction of the cleaning nozzle;
A rotating block that is rotatably accommodated in the support hole and is provided with a nozzle insertion hole through which the cleaning nozzle passes at a position offset from the rotation center;
A cleaning device comprising: a connecting means for connecting the rotating block to the support block at an arbitrary rotational orientation of the rotating block.   The connecting means includes a plurality of pin holes provided in the support block so as to surround the support holes, and pins protruding from the rotary block so as to fit into one of these pin holes. The cleaning apparatus according to claim 1, wherein   The connecting means includes a plurality of pin holes provided in the rotating block so as to surround the nozzle insertion hole, and a pin protruding from the support block so as to fit into one of these pin holes, The cleaning apparatus according to claim 1, comprising: A portion to be cleaned that needs to be cleaned with the cleaning liquid is provided to be movable to the cleaning device, a cleaning nozzle that discharges the cleaning liquid to the target cleaning portion is provided in the cleaning device, and the target cleaning portion is provided in the cleaning device. A position adjustment method of a nozzle in a cleaning apparatus provided with a nozzle position adjustment mechanism for adjusting the position shift when the position of the cleaning liquid discharged from the cleaning nozzle is shifted from the position of
A support block provided in the cleaning device and provided with a support hole extending in the axial direction of the cleaning nozzle, and a nozzle insertion hole through which the cleaning nozzle is passed in a position that is rotatably accommodated in the support hole and offset from the rotation center. Preparing a rotating block provided, and a connecting means for connecting the rotating block to the support block at an arbitrary rotational orientation of the rotating block;
Moving the object to be cleaned and stopping when the distance to the cleaning nozzle is minimized;
Rotating the rotating block to adjust the direction of the cleaning nozzle;
And a step of connecting the rotating block to the support block by the connecting means.

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