JP2566198Y2 - Automatic mounting device for masking members for painting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention is applied to, for example, a vehicle engine production line and is used for painting a crankcase of the engine, in which a masking member is automatically attached to a portion where paint adhesion is not preferable. The present invention relates to an automatic mounting device for a masking member.

[0002]

2. Description of the Related Art Conventionally, in manufacturing a vehicle engine,
Crankcases, cylinder heads, etc. are each painted at a certain stage in the manufacturing process, but paint adheres to a part of the surface of the crankcase, etc., that is, around the openings of various bolt holes and the mounting surface of other parts Therefore, masking paper having a circular or other required planar shape is attached to these portions before coating to shield them.

[0003] The above-mentioned masking paper is widely used in which an adhesive material is applied to one side of a paper piece having a circular or other required planar shape and is adhered to release paper so as to be easily peeled off. The operation of peeling the masking paper from the paper and the operation of pressing the peeled masking paper against a predetermined position of the crankcase and mounting the same have all been performed manually.

[0004] For this reason, there has been a problem that the work cost for mounting the masking paper is increased, and work errors such as mounting leaks and improper mounting positions are apt to occur.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a masking member that is automatically, quickly, accurately and at a low cost at a predetermined position on an object to be coated such as an engine crankcase. It is an object of the present invention to provide an automatic mounting device for a masking member for coating, to which a mask can be attached.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a supply device for a paper-like masking member, a plug inserted into a hole which needs to be masked around the opening, and a plug around the opening. A robot hand capable of selectively picking up a plug-shaped masking member made of a mask plate covering the portion and a paper-sheet-shaped masking member supplied from the supply device, wherein the plug-shaped masking member and the paper-sheet-shaped masking member are provided. A reel device for transporting and attaching to an object to be coated such as an engine crankcase, wherein the supply device rotatably supports a roll on which release paper wound with a large number of paper-like masking members adhered is released. A feeding device for feeding the release paper from the roll, and a release paper disposed at an intermediate position of the release paper traveling path and bending the release paper at an acute angle. A peeling unit for peeling off the attached paper-flake masking member, and an air ejecting device that is disposed adjacent to the peeling unit and blows air on the adhesive surface side of the peeled paper-flake masking member, and A robot device includes a robot body and an XYZ provided on the robot body.
A robot arm that can be displaced in the axial direction, a suction device that is attached to the distal end of the robot arm and that vacuum-suctions and picks up the sheet-like masking member peeled off by the peeling section, And a robot hand having a chuck device for clamping and picking up the plug-shaped masking member placed thereon.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be specifically described below with reference to the accompanying drawings. First, in the schematic plan view of the masking member automatic mounting device shown in FIG. 1, reference numeral 10 denotes an object to be coated, which is mounted on an appropriate conveyor device 12 and transported to a predetermined coating position A, for example, a vehicle. This is the engine crankcase.

At the painting position A, a robot device 14 whose external shape is shown in the perspective view of FIG. 2 is arranged, and a paper-sheet-like masking member supply device 16 described in detail later is provided. Have been. The painting position A is changed from the preceding process (not shown) by the conveyor device 12.
Is stopped at the same position for a predetermined period of time.
After the required portion is masked by 4 and then the coating is performed, it is conveyed to the next process by the conveyor device 12.

As shown in FIG. 2, the robot apparatus 14 has a robot body 20 having a turntable 18 which can freely rotate in a horizontal plane, and a horizontal axis line on the robot body 20. A robot arm 22 mounted so as to be able to freely rotate around the robot arm, and a robot hand 24 mounted on the distal end portion of the robot arm 22 so as to be able to freely rotate around a vertical axis. ing.

The detailed structure of the robot hand 24 is shown in a front view of FIG. 3 and a side view of FIG. As shown in the figure, the robot hand 24 includes a hand main body 28 on one side of which a tool adapter 26 (see FIG. 2) known per se is attached. The tool adapter 26 cooperates with the arm-side adapter 30 attached to the distal end of the robot arm 22, and is freely attached to and detached from the arm-side adapter 30 by a pneumatic signal.

On the other side of the hand body 28, a hexahedral suction device 34 is mounted via a pair of guide rods 32 so as to be freely slidable in the vertical direction in FIG. The suction device 34 is always elastically urged downward by a spring 36.

The suction device 34 includes a metal substrate 38.
And a rubber plate 40 fixed to the lower surface of the substrate 38, and a plurality of (two in each case, left and right in the illustrated case) are formed on the lower surface of the rubber plate 40, as shown in FIG. Pieces, total 4
) Vacuum openings 42 are provided. The above vacuum opening 4
2 is connected to a vacuum source such as a vacuum pump (not shown) via a vacuum passage 44 and a nipple 46 in the rubber plate 40 and the substrate 38.

On the other side of the hand body 28, a chuck device 48 known per se is mounted. The chuck device 48 includes an air cylinder that operates using compressed air as a working medium, and a first finger 50 that is driven by being connected to a piston shaft of a piston stored in the air cylinder.
Is connected to the piston shaft via a rack and a pinion, and in a direction opposite to the displacement direction of the first finger 50,
And a second finger 52 which is simultaneously displaced by the same amount.

The adsorbing device 34 includes a masking member 54 (see FIG. 1), which is in the form of a piece of paper, such as a sheet of paper or a resin thin plate, whose plane shape is circular, elliptical, or other suitable shape for the surface of the crankcase 10 that requires masking. 9) can be picked up by vacuum suction.
Can be picked up by clamping the plug-shaped masking member 56 shown in FIG. 6 and FIG.

The plug-shaped masking member 56 includes a first plug 58 inserted into a first hole such as a water hole of the crankcase 10 and a second plug 60 inserted into a second hole.
And a mask plate 62 that connects the first and second plugs 58 and 60 and covers a surface of the first and second holes that requires masking, and a circle protruding from a substantially central portion of the mask plate 62. And a columnar gripped portion 64.
A magnet 66 for generating an attractive force for preventing the plug-shaped masking member 56 from falling off when the plug-shaped masking member 56 is attached to a predetermined position of the crankcase is inserted into the gripped portion 64.

Further, as shown by solid arrows in FIG. 4, the first and second fingers 50 of the chuck device 48 are provided.
And 52 are displaced toward each other so that the gripped portion 64 is clamped, and the first and second fingers 50 and 5 are moved as indicated by dotted arrows.
As the two are displaced away from each other, the gripped portion 64 and thus the plug-shaped masking member 56 are released.

The supply device 16 for the sheet-like masking member 54 is shown in detail in the plan view of FIG. 8 and the side view of FIG. The supply device 16 includes a pair of side plates 6 arranged side by side.
6, a notch 68 is obliquely provided at an upper portion of one end of the side plate 66. Both ends of the shaft 72 of the reel device 70 are inserted into the notch 68 so as to be able to be inserted and removed and to be rotatable.

The reel device 70 includes a pair of left and right holding plates 74 supported on a shaft 72 so as to approach or separate from each other, and a roll 76 is held between the holding plates 74. The roll 76 is formed by winding a large number of paper strip-shaped masking members 54 each having an adhesive applied on one side surface, aligned and stuck on a release paper 78, and wound in multiple layers.

A top plate 80 is fixed to an upper end of the left and right side plates 66 farther from the notch 68, and a pair of left and right guide members 82 for guiding both side edges of the release paper 78 are disposed on the top plate 80. The guide member 82 has a long hole 84.
Along with the width of the release paper 78. Also, two upper and lower guide plates 86 that are opposed to each other with a small gap are disposed adjacent to the end of the top plate 80 on the reel device 70 side, and the release paper 78 is inserted between the two guide plates 86. Is done.

Further, a release plate 88 is provided adjacent to an end of the top plate 80 remote from the reel device 70, and as shown in FIG. And is led to the pinch roller 90. The pinch roller 90 is a swing lever 9 pivotally supported by a pivot 92.
4 is rotatably supported at one end and is pressed against a rubber roller 98 by a spring 96 locked at the other end of the swing lever 94. Further, the rubber roller 98 is driven by a drive motor 102 via a gear train 100.

At an appropriate position above the top plate 80, there is provided a sensor 104 for detecting the sheet-like masking member 54 stuck on the release paper 78. Further, a compressed air pipe 106 connected to an appropriate compressed air source is provided adjacent to the peeling plate 88, and compressed air is injected from an injection port 108 formed in the air pipe 106. .

The drive motor 102, the gear train 100, the rubber roller 98, and the pinch roller 90 form a feeding device for feeding the release paper 78 from the roll 76. Further, a release plate 88 disposed in the passage of the release paper 78 fed out forms a release section for bending the release paper at an acute angle to release the attached piece of paper-like masking member 54.

In the above construction, when the crankcase 10 to be coated is conveyed to the painting position A by the conveyor device 12, a position sensor such as a limit switch (not shown) is operated to stop the conveyor device 12 and Then, the robot device 14 starts operating. At the same time, the drive motor 102 operates and the gear train 100
The rubber roller 98 is rotated via the pinch roller 90 and cooperates with the pinch roll 90 to feed out the release paper 78 by one pitch of the sheet-like masking portion 54 stuck thereon.

When the release paper 78 fed from the roll 76 is sharply bent at the edge of the release plate 88, the paper-like masking member 54 peels off. At this time, compressed air is discharged from the injection port 108 of the compressed air pipe 106. The masking member 54 is sprayed on the adhesive material application surface. At this time, since the suction device 34 of the robot hand 24 is located above the peeling portion as shown by a dashed line in FIGS. 8 and 9, the paper-flake masking peeled as described above is performed. The member 54 is sucked by the suction device 34 by a vacuum suction force. At this time, the airflow blown from the injection port 108 prevents the paper-sheet-shaped masking member 54 from hanging down, and assists reliable suction to the suction device 34.

Since the robot hand 24 that has absorbed the paper-like masking member 54 can be freely displaced around the XYZ three axes, the masking member 54 is pressed against a predetermined position of the crankcase 10 and adhered thereto. Similarly, the required number of paper-like masking members 54 are picked up by the robot hand 24 and the crankcase 1
0 is automatically attached to the required part. In the illustrated embodiment, a circular masking member 54 of the same size is aligned and affixed to the release paper 78 of the roll 76. Of course, the masking members 54 having different shapes are naturally attached to the release paper 78 in a preset order. The crank hand 10 can be sequentially attached to different masking positions by the robot hand 24.

The sensor 104 detects the sheet-like masking member 54 on the release paper 78, and operates the feeding device so that the masking member is correctly sent one by one to the suction position of the robot hand 24. A signal is generated.

Next, the plug-shaped masking member 56 shown in FIG. 6 and FIG.
The required number is prepared on a support table indicated by reference numeral 110 in FIG. A robot hand 24 that can be displaced about XYZ axes moves to the support table 110, and the chuck device 4
The masking member 56 by the fingers 50 and 52 of FIG.
The clamped portion 64 is clamped and taken up, and pressed against a predetermined position of the crankcase 10 to insert the first and second plugs 58 and 60 into corresponding holes of the crankcase in the same manner as described above.

The magnet 66 inserted into the gripped portion 64 prevents the masking member 56 from falling off, and the crankcase 1 which needs to be masked by the mask plate 62.
0 is surely covered. By the same operation of the robot hand 24, the required number of plug-shaped masking members 56 are mounted on each part of the crankcase 10.

After the sheet-like masking member 54 and the plug-like masking member 56 have been attached to all the parts of the crankcase 10 that require masking as described above, the robot hand 24 shown in FIG. The crankcase 10 is removed from the robot arm 30 and is attached to the tip of the robot arm 22 by a painting gun (not shown), and the crankcase 10 is painted by the conveyor device 12 after painting. In a subsequent appropriate step, the paper-like masking member 54 and the plug-like masking member 56 are removed from the crankcase 10, the former is discarded, and the latter is returned to the painting position A and reused.

[0030]

As described above, the automatic mounting device for a masking member for coating according to the present invention is inserted into a hole for which a masking member around the opening and a supply device for the sheet-like masking member are required. A robot hand capable of selectively picking up a plug and a plug-shaped masking member made of a mask plate covering the periphery of the opening and a paper-sheet-shaped masking member supplied from the supply device, wherein the plug-shaped masking member and paper are provided. A robot device that transports and attaches the flaky masking member to an object to be coated such as an engine crankcase, and the supply device rotatably rotates a roll of release paper wound with a large number of flaky masking members adhered thereto. A reel device for supporting, a feeding device for feeding the release paper from the roll, and an acute bending of the release paper which is arranged in the middle of the travel path of the release paper A peeling unit that peels off the paper-sheet-shaped masking member that is adhered to the paper-sheet-like masking member, and an air ejecting device that is arranged adjacent to the peeling-off unit and blows air on the adhesive surface side of the peeled-off paper-flake-shaped masking member. The robot apparatus includes a robot main body, a robot arm provided on the robot main body, the robot arm being displaceable in the XYZ axis directions, and a sheet-like masking member mounted on the distal end of the robot arm and peeled off by the peeling section. A robot hand having a suction device for picking up by vacuum suction and a chuck device for clamping and picking up the plug-shaped masking member placed at an appropriate position within the movement range of the robot arm; A masking member can be automatically, quickly and accurately attached to a desired position on an object to be coated such as a crankcase. Since, there is an advantage capable of reducing operating costs effectively, it is practically useful.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of an apparatus for automatically attaching a masking member according to an embodiment of the present invention.

FIG. 2 is a perspective view of the robot device 14 in FIG.

3 is a front view of a robot hand 24 in the robot device 14 shown in FIG.

4 is a side view of the robot hand 24 shown in FIG.

FIG. 5 is a plan view of a suction device in the robot hand shown in FIG. 3;

FIG. 6 is a plan view of a plug-shaped masking member 56 used in the present invention.

FIG. 7 is a side view of the plug-shaped masking member 56 shown in FIG.

FIG. 8 is an enlarged plan view of the supply device 16 in FIG.

9 is a side view of the supply device 16 shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Crankcase (object to be coated) 12 Conveyor device 14 Robot device 16 Supply device 54 Paper-like masking member 56 Plug-like masking member

Claims (1)

(57) [Scope of request for utility model registration] 1. A supply device for a sheet-like masking member, a plug-like masking member comprising a plug inserted into a hole required to be masked around the opening, and a mask plate covering the periphery of the opening, and the supply device Robot hand that can selectively pick up a paper-like masking member supplied from a robot, and transports and attaches the plug-like masking member and the paper-like masking member to an object to be coated such as an engine crankcase. A reel device for rotatably supporting a roll of release paper wound with a large number of paper-like masking members adhered thereto, a feeding device for feeding release paper from the roll, and the release device. A peeling unit that is disposed in the middle of the running path of the pattern paper and peels off the attached sheet-like masking member by bending the release paper sharply. And an air ejecting device that is disposed adjacent to the peeling portion and blows air on the adhesive surface side of the peeled paper-flake masking member, and the robot device is provided on the robot body and the robot body. XYZ
A robot arm that can be displaced in the axial direction, a suction device that is attached to the distal end of the robot arm and that vacuum-suctions and picks up the sheet-like masking member peeled off by the peeling section, And a robot hand having a chuck device for clamping and picking up the plug-shaped masking member placed thereon.