JP4488520B2 - Masking apparatus and masking method for vehicle wheel coating - Google Patents

Description

  The present invention relates to a masking device used when painting a vehicle wheel and a masking method using the masking device.

  When painting vehicle wheels, there are places where coating should be avoided. That is, a reference cylindrical surface on which a reference convex portion of the hub of the vehicle is fitted on the inner periphery of the hub hole, and a nut seat of a plurality of bolt holes formed around the hub hole. Therefore, when painting, it is necessary to mask the reference cylindrical surface of these hub holes and the nut seats of the bolt holes.

  For the masking, for example, a masking jig as disclosed in Patent Document 1 is used. The masking jig includes a gripping portion, a plurality of leg portions extending downward from the gripping portion like a foot, a hub hole mask provided at a lower end of the leg portions, and a plurality of nut seats. And a mask. The hub hole mask is disposed directly below the grip portion, and the nut seat mask is disposed around the hub hole mask.

Prior to painting, the vehicle wheel is supported horizontally with the design surface up, and the masking jig is manually set on the vehicle wheel. In other words, holding the masking jig, the hub hole mask is placed on the design surface side end of the hub hole, and the nut seat mask is placed on the nut seat.
Japanese Utility Model Publication No. 61-106371

  However, since the masking jig of Patent Document 1 has a large number of leg portions, when the paint is sprayed on the design surface of the vehicle wheel, coating unevenness is likely to occur in the areas where the leg portions are shaded. Also, in the case of high-mix low-volume production as in recent years, a large number of masking jigs must be prepared corresponding to the hub hole diameter, the number of bolt holes, and the nut seat diameter for each vehicle wheel. However, the cost for production and management increased.

  The present invention has been made to solve the above-described problems, and supports a vehicle wheel in an apparatus for masking a central hub hole and a plurality of bolt holes around it when painting a vehicle wheel. A support base, a hub hole mask and a plurality of nut seat masks separated from each other, the support base having a support and a vehicle wheel support provided at an upper end of the support; The vehicle wheel support portion is a vehicle wheel installation surface on which the vehicle wheel is placed horizontally with its design surface up, and the vehicle wheel is protruded upward from the vehicle wheel installation surface and inserted into the hub hole of the vehicle wheel. And a positioning hole extending perpendicularly to the upper surface of the positioning protrusion. The hub hole mask has a circular planar shape. A covering shaft, a gripping shaft protruding from the center of the upper surface of the covering, and a positioning shaft protruding from the center of the lower surface of the covering, and inserting the positioning shaft into the positioning hole of the support base, The hub hole mask is positioned in the radial direction, and the covering portion covers the reference cylindrical surface of the hub hole in this positioning state, and the nut seat mask has a covering portion whose planar shape is circular. The covering portion rests on the nut seat of the bolt hole and covers the nut seat.

According to the above configuration, the hub hole mask and the nut seat mask are separated from each other, and are not configured to be connected to each other by the leg portion. . Also, it is only necessary to prepare hub hole masks corresponding to various hub hole diameters, and to prepare nut seat masks corresponding to various nut seat diameters. Since it is not necessary to prepare these masks corresponding to the difference in the number of combinations and bolt holes, the cost for manufacturing and managing the masks can be reduced.
Further, the hub mask can be easily positioned in the radial direction by inserting the positioning shaft portion into the positioning hole of the support base.

Preferably, the upper surface of the positioning convex portion of the support base is provided as a flat and horizontal mask installation surface, and the cover portion of the hub hole mask rests on the mask installation surface, and the outer periphery of the cover portion is the hub hole. Is opposed to the inner circumference with a slight gap, thereby closing the reference cylindrical surface located below the covering portion.
According to this configuration, since the covering portion of the hub hole mask enters the hub hole, the paint can be satisfactorily adhered to the vicinity of the hub hole on the design surface of the vehicle wheel.

Preferably, the vehicle wheel support portion includes a box and a cone head that is separate from the box, and an accommodation hole is formed at an upper end of the box, and an upper surface of the box surrounding the accommodation hole is the vehicle. Provided as a wheel installation surface, the cone head is accommodated in the accommodation hole of the box so as to be movable in the vertical direction, protrudes from the vehicle wheel installation surface and is provided as the positioning projection, and the box further includes: There are provided biasing means for biasing the cone head upward, guide means for prohibiting radial movement of the cone head and guiding vertical movement, and stopper means for restricting upward movement of the cone head.
According to the above configuration, even if the diameter of the hub hole of the vehicle wheel is different, the vehicle wheel can be positioned in the radial direction by the cone head hitting the peripheral edge of the lower end of the hub hole. In addition, by placing the vehicle wheel on the vehicle wheel installation surface, the vehicle wheel can be stably supported at a predetermined height.

Preferably, the cone head is provided as a flat and horizontal mask installation surface, the hub hole mask covering portion is placed on the mask installation surface, and the outer periphery of the covering portion is on the inner periphery of the hub hole. It confronts through a slight gap, and closes the reference cylindrical surface located below the covering portion.
According to this configuration, since the covering portion of the hub hole mask enters the hub hole, the paint can be satisfactorily adhered to the vicinity of the hub hole on the design surface of the vehicle wheel.

  When the hub hole of the vehicle wheel has a small diameter, the peripheral edge of the lower end of the hub hole hits the upper part of the cone head, so that the mask installation surface of the cone head is located in the hub hole. In this case, a hub hole mask having a disk-shaped covering portion is used.

  When the hub hole of the vehicle wheel is large, the peripheral edge of the lower end of the hub hole hits the lower part of the cone head, so that the mask installation surface of the cone head is positioned above the hub hole. In this case, the hub hole mask is used in which the covering part has a disk part mounted on the mask installation surface of the cone head and a cone part extending downward from the periphery of the disk part. Thereby, the outer peripheral edge of the cone part of the hub hole mask faces the inner periphery of the hub hole of the vehicle wheel.

  Preferably, the nut seat mask has an insertion convex portion formed on the lower surface of the center of the cover portion having a disc shape, and the nut convex portion is inserted into the bolt hole of the vehicle wheel. The mask is positioned in the radial direction. Thereby, the nut seat mask can reliably cover the nut seat.

  Preferably, the lower surface of the covering portion of the nut seat mask forms a conical surface that proceeds downward in the radial direction and the outward direction. Thereby, the contact area to the nut seat of the mask for nut seats becomes small, and removal becomes easy.

  Preferably, the hub hole mask is mounted and removed from the hub hole of the vehicle wheel in a state where the gripping shaft portion is chucked by a robot. Thereby, mounting and removal of the mask for the hub hole can be automated.

  Preferably, the nut seat mask is attached to and detached from the bolt hole of the vehicle wheel while being sucked by the suction portion of the robot. Thereby, mounting and removal of the nut seat mask can be automated.

Furthermore, the present invention is a masking method using the vehicle wheel coating masking device, wherein the vehicle wheel is supported on the support base, a hub hole mask is mounted on the hub hole, and a nut seat is mounted on the bolt hole. It is characterized in that the solvent paint is sprayed in a state where the mask is mounted, the hub hole mask is removed after the spraying, baking is performed while the nut seat mask is mounted, and the nut seat mask is removed after baking.
According to this method, since the hub hole mask is removed after painting and before baking, it is easy to clean the solvent paint, and the number of hub masks to be used can be reduced even when mass producing vehicle wheels. . Further, since the mask for the nut seat is removed in the baking process, the paint adhering to the inner periphery of the counterbore portion of the bolt hole is not scraped off during the removal.

  As described above, in the present invention, the hub mask can be easily positioned, the reference cylindrical surface of the hub hole can be reliably masked, and the mask can be manufactured and managed without causing coating unevenness. Cost can be reduced.

  Hereinafter, a masking apparatus constituting a first embodiment of the present invention will be described with reference to FIGS. 1 to 5 and FIG. 6 (A). FIG. 1 shows a support base 10 fixed to a transport conveyor 1 in a carry-in line and a vehicle wheel 100 immediately before being set on the support base 10.

  The vehicle wheel 100 is made of a cast aluminum product, and includes a disk 101 and a rim 102 provided on the outer peripheral edge of the disk 101.

  The front surface of the disk portion 101 is provided as a design surface 101 a having a complicated curved surface shape, and the center portion of the back surface is a flat hub mounting surface 101 b that is orthogonal to the central axis of the disk portion 101.

  A hub hole 103 is formed at the center of the disk 101, and a plurality of, for example, five bolt holes 104 are formed around the disk 101 at equal intervals in the circumferential direction.

  In the inner periphery of the hub hole 103, a portion away from both ends is provided as a reference cylindrical surface 103x. The reference cylindrical surface 103x is used for positioning the vehicle wheel 100 in the radial direction by fitting the reference convex portion of the hub when the vehicle wheel 100 is attached to the hub of the vehicle. The diameter of the reference cylindrical surface 103x needs to be managed with high accuracy and is a place where coating film formation should be avoided.

  A counterbore 104a is formed on the design surface 101a side of the bolt hole 104, and a nut seat 104x is formed. The nut seat 104x forms a flat surface orthogonal to the central axis of the disk portion 101.

  When the vehicle wheel 100 is attached to the vehicle hub, the hub hits the hub attachment surface 101b of the vehicle wheel 100, and a plurality of bolts protruding from the hub are inserted into the bolt holes 104 of the vehicle wheel 100. The vehicle wheel 100 is fixed to the hub by tightening a nut screwed to the tip of these bolts. At this time, the nut is accommodated in the counterbore 104a and comes into contact with the nut seat 104x with a strong tightening force. Therefore, it is necessary to manage the nut seat 104x with high precision flatness, and this is a place where coating film formation should be avoided.

  Next, the support 10 will be described in detail. The support 10 includes a pipe-shaped column 11 fixed to the conveyor 1 and standing vertically, and a vehicle wheel support 10 a provided at the upper end of the column 11. The vehicle wheel support portion 10 a includes a box 12 and a cone head 13 (positioning convex portion) that can be raised and lowered with respect to the box 12.

  The column 11 passes through the center of the bottom wall of the box 12, and the upper end portion 11 a is disposed inside the box 12. The upper end portion of the peripheral wall of the box 12 has a small diameter, whereby an annular step 12a (stopper means) is formed. The upper end opening of the box 12 is provided as a receiving hole 12 b for receiving the cone head 13. The upper end surface of the peripheral wall of the box 12 forms a horizontal flat surface and is provided as a vehicle wheel installation surface 12x described later.

  The cone head 13 includes a disk part 13a, a cone part 13b extending downward from the outer peripheral edge of the disk part 13a, a cylindrical part 13c extending downward from the outer peripheral edge of the cone part 13b, and the cylindrical part 13c. And an annular flange 13d extending in the radial direction and the outward direction from the lower end edge of each of the two. The disk portion 13a is horizontal, and its flat upper surface is provided as a mask installation surface 13x described later.

  A pipe-shaped lifting rod 14 extending vertically downward is fixed to the lower surface of the disk portion 13 a of the cone head 13, and the lifting rod 14 is inserted into the upper end portion 11 a of the column 11. Thereby, the cone head 13 is guided to move up and down in a state in which movement in the radial direction is prohibited with respect to the support column 11 and the box 12. Thus, the elevating rod 14 and the upper end portion 11 a of the support column 11 constitute the guide means 15.

  A hole is formed in the center of the disk portion 13a of the cone head 13 so as to be connected to the inner space of the lifting rod 14. The hole of the disk portion 13a and the inner space of the lifting rod 14 constitute a positioning hole 16. Yes. Note that the upper end portion of the positioning hole 16 (the portion corresponding to the hole of the disk shape 13a) has a smaller diameter than the other portion (the portion corresponding to the internal space of the elevating rod 14), and a hub hole mask 30 described later. Responsible for positioning.

  The cone head 13 is always biased upward by a compression coil spring 17 (biasing means). The compression coil spring 17 is housed in the box 12 while being wound around the upper end portion of the support column 11 and the lifting rod 14.

  As shown in FIG. 1, the cone head 13 is restricted from moving upward when its flange 13 d hits the annular step 12 a of the box 12.

  As shown in FIG. 2, the vehicle wheel 100 is set on the support 10 by a robot (not shown). In this set state, the hub mounting surface 101 b of the vehicle wheel 100 is placed on the vehicle wheel installation surface 12 x of the box 12 of the support base 10, so that the vehicle wheel 100 is level with the design surface 101 a on the support base 10. Supported by

  In the set state, the lower peripheral edge of the hub hole 103 of the vehicle wheel 100 hits the cone portion 13 b of the cone head 13 and pushes the cone head 13 downward against the force of the compression coil spring 17. The contact position of the lower peripheral edge of the hub hole 103 with the cone head 13 varies depending on the inner diameter of the hub hole 103. If the inner diameter of the hub hole 103 is small as in the present embodiment, as shown in FIG. 2, it hits the upper portion of the cone portion 13 b of the cone head 13 and the amount of downward movement of the cone head 13 becomes large. The mask installation surface 13 x of the cone head 13 is located in the hub hole 103.

  The cone head 13 is prohibited from moving in the radial direction by the guide means 15, the hub mounting surface 101 b of the vehicle wheel 100 is placed on the vehicle wheel installation surface 12 x of the box 12 of the support base 10, and the hub hole 103 When the entire periphery of the lower end periphery hits the cone portion 13 b of the cone head 13, the vehicle wheel 100 can be positioned horizontally in the radial direction and the vertical direction, and the center thereof can coincide with the center of the support base 10.

  The support 10 that supports the vehicle wheel 100 as described above is transported to the vicinity of the coating line by the transport conveyor 1. Since the vehicle wheel 100 is transported in a state of being horizontally supported by the vehicle wheel installation surface 12x of the support base 10, stable transportation is performed.

  In the vicinity of the painting line, as shown in FIG. 3, the robot 50 attaches the mask 20 (nut seat mask) to the bolt hole 104 of the vehicle wheel 100.

  As shown in FIG. 4, the mask 20 has a disc-shaped covering portion 21 and a columnar insertion convex portion 22 that protrudes downward from the center of the lower surface of the covering portion 21. The lower surface of the covering portion 21 has a conical surface shape that proceeds downward in the radial direction and the outward direction.

  The mounting operation of the mask 20 will be described. The mask 20 is set in advance on a pallet placed at a predetermined position. The robot 50 has a suction part 51 that performs air suction.

  First, the vehicle wheel 100 is photographed by the video camera 55 arranged immediately above the vehicle wheel 100 in a stopped state. Thereby, the position of the bolt hole 104 of the vehicle wheel 100 is detected. After that, the robot 50 sucks the mask 20 from the pallet by the sucking unit 51, positions it just above the bolt hole 104 based on the position detection information from the video camera 55, and further descends to reach the counterbore 104a. Then, the suction is released and the mask 20 is dropped on the spot facing portion 104a.

  The mask 20 dropped on the spot facing portion 104a is positioned in the radial direction by the insertion convex portion 22 being guided by a taper formed on the inner peripheral edge of the nut seat 104x and entering the bolt hole 104. And the coating | coated part 21 rests on the nut seat 104x, and covers this nut seat 104x.

As described above, the mask 20 is set in the bolt holes 104 of the vehicle wheel 100 one after another.
The mask 20 may be set in a state where the vehicle wheel 100 is floated from the support base 10 and maintained at a predetermined position by another robot.

  Next, the vehicle wheel 100 is carried by the robot from the support base 10 (FIGS. 1 to 3) of the transport conveyor 1 on the carry-in line to a support base fixed to the transport conveyor upstream of the painting line. In this embodiment, since the support stand of this coating line is the same structure as the support stand 10 provided in the conveyance conveyor 1 of FIGS. 1-3, the detailed description is abbreviate | omitted.

  The vehicle wheel 100 on which the mask 20 is mounted as described above is transported to the vicinity of the turntable 2 of the painting stage shown in FIG. 5 by the transport conveyor, and is moved by the robot 60 to the support base 10 installed on the turntable 2. It is. Since the support table 10 of the turntable 2 has the same configuration as the support table 10 provided on the conveyor 1 of FIGS. 1 to 3, the same reference numerals are given to the corresponding components in the drawing, and the detailed description thereof will be given. Is omitted.

Next, the robot 60 attaches the mask 30 (hub hole mask) to the hub hole 103 of the vehicle wheel 100.
When the hub hole 103 has a small diameter as in the present embodiment, the mask 30 shown in FIG. 6A is used. The mask 30 includes a covering portion 31 having a disk shape, a gripping shaft portion 32 protruding from the center of the upper surface of the covering portion 31, and a positioning shaft portion 33 protruding from the center of the lower surface of the covering portion 31. The gripping shaft portion 32 and the positioning shaft portion 33 are coaxial and orthogonal to the covering portion 31. The lower end portion of the positioning shaft portion 33 is tapered.

  The mask 30 corresponding to the vehicle wheel type is prepared at a predetermined position by the cleaning supply device. The robot 60 has a chuck portion 61. The chuck portion 61 chucks the grip shaft portion 32 of the mask 30 and moves it to the position just above the hub hole 103 while maintaining the vertical position. When the lower end of the portion 33 reaches the vicinity of the upper end of the positioning hole 16 of the cone head 13, the gripping shaft portion 32 is released and the mask 30 is dropped.

  The covered portion 31 of the mask 30 that has been dropped enters the hub hole 103 and rests on the mask installation surface 13 x of the cone head 13. Further, the positioning shaft portion 33 enters the positioning hole 16 of the cone head 13, and the radial positioning is performed by the small diameter upper end portion of the positioning hole 16 (the portion corresponding to the hole formed in the disk portion 13a of the cone head 13). Made. The outer periphery of the covering portion 31 of the mask 30 thus positioned faces the inner periphery of the hub hole 103 with a slight gap and covers the reference cylindrical surface 103 x of the hub hole 103 positioned below the covering portion 31.

  In a state where the vehicle wheel 100 is rotated by the turntable 2, a solvent paint is sprayed onto the outer peripheral surface of the design surface 101 a and the rim 102 by the coating robot.

  When spraying the solvent paint, the nut seat 104x of the vehicle wheel 100 is covered with the covering portion 21 of the mask 20, and the reference cylindrical surface 103x of the hub hole 103 is also covered with the covering portion 31 of the mask 30. The paint can be prevented from adhering to the seat 104x and the reference cylindrical surface 103x.

Since the masks 20 and 30 are not connected by leg-shaped legs as in the conventional masking jig, it is possible to prevent uneven coating due to shadows of the legs.
Further, since the covering portion 31 of the mask 30 enters the hub hole 103, the paint can be satisfactorily adhered to the design surface 103a around the hub hole 103.
The paint is also sprayed on the inner periphery of the spot facing portion 104 a of the bolt hole 104.

  After spraying the paint, the robot 60 removes the mask 30 from the hub hole 103 of the vehicle wheel 100 and moves the vehicle wheel 100 from the turntable 2 to a support stand fixed to a conveyor on the subsequent stage of the painting line. The removal of the mask 30 is performed by chucking the gripping shaft portion 32 with the chuck portion 61 of the robot 60 as described above.

  The removed mask 30 is set in the cleaning supply device, the paint is removed, and stored in the storage space. Thus, since the mask 30 is removed immediately after painting, a minimum number may be prepared. Moreover, since it removes before baking, the removal of the coating material adhering to the coating | coated part 31 and the holding | grip shaft part 32 is easy. Further, the positioning shaft portion 33 of the mask 30 does not get in the way in the transfer operation of the vehicle wheel 100.

  The conveyance conveyor and support stand in the latter stage of the coating line have the same configuration as the conveyance conveyor 1 and support stand 10 in FIGS.

  The vehicle wheel 100 is transported to the baking line by the transport conveyor at the latter stage of the coating line. When the vicinity of the baking line is reached, the vehicle wheel 100 is moved by a robot to a support base (not shown) fixed to the transfer conveyor of the baking line. In the present embodiment, the support for the baking line has the same configuration as the support 10 shown in FIG.

  The vehicle wheel 100 passes through a long furnace while being transported to the transport conveyor of the baking line, and the paint is baked in this process. Since the vehicle wheel 100 can be transported in a stable posture at a predetermined height in the same manner as the support base described above, good baking can be performed without damaging the furnace or the like.

  After this baking, the mask 20 is removed from the bolt hole 104 of the vehicle wheel 100. The robot and video camera used at this time are the same as in FIG.

  As described above, since the mask 20 is removed after baking, the paint adhering to the inner peripheral surface of the spot facing portion 104a is not scraped off at the time of removal, and it is possible to satisfactorily form a coating film on the inner peripheral surface. it can.

  Since the lower surface of the mask 20 has a conical surface and only the outer peripheral edge of the mask 20 contacts the nut seat 104x, the contact area is small and the mask 20 can be easily removed.

The removed mask 20 is set on a pallet, and this pallet is automatically returned to its original position by a transfer conveyor or a robot.
When the solvent is sprayed or baked a plurality of times, the mask 20 is removed after the last baking.

  Next, a second embodiment of the present invention will be described with reference to FIG. 6 (B), FIG. 7 and FIG. In this embodiment, as shown in FIGS. 7 and 8, since the inner diameter of the hub hole 103 of the vehicle wheel 100 is large, the lower peripheral edge of the hub hole 103 is the cone portion of the cone head 13 when set on the support base 10. The amount of downward movement of the cone head 13 is small due to contact with the lower portion of 13b.

  Since the mask installation surface 13x of the cone head 13 is located above the hub hole 103, it cannot be covered with the mask 30 of FIG. Therefore, in this embodiment, the mask 40 in FIG. 6B is used.

  Similar to the mask 30 of the first embodiment, the mask 40 includes a covering portion 41, a gripping shaft portion 42, and a positioning shaft portion 43.

  The covering portion 41 has a disc portion 41a orthogonal to the shaft portions 42 and 43, and a cone portion 41b extending downward from the outer peripheral edge of the disc portion 41a. The outer periphery of the cone part 41b has a bowl shape extending horizontally.

  When the mask 40 is mounted in the hub hole 103 in the same manner as in the first embodiment, the disk portion 41 a is placed on the mask installation surface 13 x of the support base 10, and the outer periphery of the cone portion 41 b is slightly spaced from the inner periphery of the hub hole 103. Confront through. Thereby, the reference cylindrical surface 103x of the hub hole 103 can be covered.

  Since the other configuration, masking, and painting process of the second embodiment are the same as those of the first embodiment, the description thereof is omitted.

The present invention is not limited to the above embodiment, and various forms can be adopted. For example, the positioning convex portion may be fixed to a predetermined height instead of a cone head that can be raised and lowered.
Instead of placing the covering portion of the hub hole mask on the positioning convex portion of the support base, it may be placed on an annular step near the upper end of the hub hole to cover the reference cylindrical surface of the hub hole.

In the above-described embodiment, the support bases installed on the transfer conveyors of the carry-in line, the pre-stage and the post-line of the coating line, and the baking line have the same configuration. For example, the support for the carry-in line and the baking line may not have a positioning hole for the hub hole mask. Further, in order to make the vehicle wheel support more stable in the baking line, the vehicle wheel installation surface may be widened.
The box may include a box body and an annular table fixed to the upper surface thereof, and the upper surface of the table may be provided as a vehicle wheel installation surface.
The present invention may be applied to coating methods other than solvent coating, for example, powder coating.

It is a longitudinal cross-sectional view which shows the support stand of the masking apparatus for coating of the vehicle wheel which shows 1st Embodiment of this invention in the state just before a vehicle wheel is set. It is a longitudinal section showing the support stand in the state where a wheel for vehicles was set. It is a longitudinal cross-sectional view which shows the same masking apparatus in the state with which the mask was mounted | worn with the bolt hole. It is a longitudinal cross-sectional view which expands and shows the principal part containing the said bolt hole and a mask. It is a longitudinal cross-sectional view which shows the same masking apparatus in the state with which the mask was each mounted | worn with the bolt hole and the hub hole. (A) is a side view showing a hub hole mask used when the hub hole of the vehicle wheel has a small diameter, and (B) shows a hub hole mask used when the hub hole of the vehicle wheel has a large diameter. It is a side view shown with a partial section. FIG. 6 is a view corresponding to FIG. 5 showing a state in which a vehicle wheel having a large-diameter hub hole is masked in the second embodiment of the present invention. In 2nd Embodiment, it is a longitudinal cross-sectional view which expands and shows the principal part containing a hub hole and a mask.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Support stand 10a Wheel support part 11 for vehicles 11 Support | pillar 12 Box 12a Step (stopper means)
12b Housing hole 12x Vehicle wheel installation surface 13 Cone head (positioning convex part)
13x mask installation surface 15 guide means 16 positioning hole 17 compression coil spring (biasing means)
20 Mask (Mask for nut seat)
21 Covering part 22 Insertion convex part 30, 40 Hub hole mask 31, 41 Covering part 32, 42 Grasp shaft part 33, 43 Positioning shaft part 41a Disk part 41b Cone part 100 Vehicle wheel 101 Disc 101a Design surface 101b Hub mounting surface 103 Hub hole 103x Standard cylindrical surface 104 Bolt hole 104a Counterbore 104x Nut seat

Claims (11)

When painting a vehicle wheel, in a device that masks the central hub hole and the surrounding bolt holes,
A support base for supporting the vehicle wheel, a hub hole mask and a plurality of nut seat masks separated from each other;
The support base includes a support and a vehicle wheel support provided at an upper end of the support, and the vehicle wheel support is for a vehicle on which the vehicle wheel is placed horizontally with its design surface facing up. Including a wheel installation surface and a positioning projection that projects upward from the vehicle wheel installation surface and positions the vehicle wheel in a radial direction by insertion into the hub hole of the vehicle wheel, and is perpendicular to the upper surface of the positioning projection Open a positioning hole that extends,
The hub hole mask includes a covering portion having a circular planar shape, a gripping shaft portion protruding from the center of the upper surface of the covering portion, and a positioning shaft portion protruding from the center of the lower surface of the covering portion. Is inserted in the positioning hole of the support base, the hub hole mask is positioned in the radial direction, and the covering portion covers the reference cylindrical surface of the hub hole in this positioning state.
The mask for masking a vehicle wheel according to claim 1, wherein the mask for the nut seat has a covering portion having a circular planar shape, and the covering portion is placed on the nut seat of the bolt hole to cover the nut seat.   The upper surface of the positioning projection of the support is provided as a flat and horizontal mask installation surface. 2. The masking device for painting a vehicle wheel according to claim 1, wherein the reference cylindrical surface located below the covering portion is closed by facing the surface through a slight gap. The vehicle wheel support has a box and a cone head that is separate from the box.
An accommodation hole is formed at the upper end of the box, and the upper surface of the box surrounding the accommodation hole is provided as the vehicle wheel installation surface.
The cone head is accommodated in the accommodation hole of the box so as to be movable in the vertical direction, and is provided as the positioning convex portion protruding from the vehicle wheel installation surface,
Further, the box is provided with biasing means for biasing the cone head upward, guide means for prohibiting radial movement of the cone head and guiding vertical movement, and stopper means for restricting upward movement of the cone head. The masking device for painting a vehicle wheel according to claim 1, wherein the masking device is applied.   Provided as a mask installation surface in which the upper surface of the cone head is flat and horizontal, the cover portion of the mask for the hub hole is placed on the mask installation surface, and the outer periphery of the cover portion is slightly spaced from the inner periphery of the hub hole. The vehicle masking device for painting a vehicle wheel according to claim 3, wherein the reference cylindrical surface located below the covering portion is closed.   5. The masking device for painting a vehicle wheel according to claim 4, wherein the covering portion of the hub hole mask has a disk shape.   The cover portion of the hub hole mask has a disc portion that rests on the mask installation surface of the cone head and a cone portion that extends downward from the periphery of the disc portion, and the outer periphery of the cone portion is the vehicle wheel. The vehicle wheel coating masking device according to claim 4, wherein the masking device faces the inner periphery of the hub hole.   The nut seat mask has an insertion convex portion formed on the central lower surface of the cover portion having a disk shape, and the insertion convex portion is inserted into the bolt hole of the vehicle wheel, thereby 7. A vehicle wheel coating masking apparatus according to claim 1, wherein positioning in the radial direction is performed.   8. The vehicle wheel coating according to claim 1, wherein a lower surface of the covering portion of the mask for the nut seat forms a conical surface that goes downward in the radial direction and the outward direction. Masking device.   9. The hub hole mask according to any one of claims 1 to 8, wherein the vehicle wheel is mounted and removed from the hub hole in a state where the grip shaft portion is chucked by a robot. Masking device for painting vehicle wheels.   10. The vehicle according to claim 1, wherein the nut seat mask is attached to and detached from a bolt hole of a vehicle wheel while being sucked by a suction portion of a robot. Wheel masking device.   A masking method using the coating masking device for a vehicle wheel according to claim 1, wherein the vehicle wheel is supported on the support base, a hub hole mask is mounted on the hub hole, and a bolt It is characterized by spraying solvent paint with the nut seat mask attached to the hole, removing the hub hole mask after spraying, performing baking with the nut seat mask attached, and removing the nut seat mask after baking. Masking method to do.

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