JP2002248411A - Method for supplying marking paint for car wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for supplying a marking paint reducing the percent defective of the phase mark of a car wheel. SOLUTION: In the method for supplying the marking paint bonded to the transfer surface 17 of a marking fixture 11 forming the phase mark of the car wheel, a series of marking paint supply processes, wherein the carrier sheet 5 intermittently moving on a paint transfer stand 2 is brought into close contact with the follower recessed part 12 provided to the surface of the paint transfer stand 2 to provide a storage groove 12 and the transfer surface 17 of the marking fixture 11 is inserted in the marking paint supplied to the storage groove 12 to bond the marking paint to the transfer surface 17 and the carrier sheet 5 is subsequently moved by predetermined quantity and the storage groove 12 is again formed to the new part of the carrier sheet, are advanced repeatedly. As a result, the marking paint bonded to the transfer surface 17 of the marking fixture 11 for forming the phase mark of the car wheel always becomes the newly supplied marking paint and, therefore, the marking paint in a proper state can be always used to eliminate marking failure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying a marking paint required for forming a phase mark of an automobile wheel.

[0002]

2. Description of the Related Art In the manufacturing process of an automobile wheel,
In the marking step of forming a phase mark at a phase point of an automobile wheel, for example, a stamping table coated with a predetermined marking paint is pressed against a transfer surface of a marking jig to adhere the marking paint to the transfer surface. After that, the transfer surface of the marking jig is brought into contact with a predetermined portion serving as a phase point of an automobile wheel, and a marking paint is applied to form a phase mark. Here, the phase point is determined by checking the eccentricity of the vehicle wheel and the tire in advance when setting the wheel and setting the minimum diameter position of the vehicle wheel and the maximum diameter position of the tire together. In order to offset the degree of eccentricity, the minimum diameter position of the vehicle wheel is described, and is an important mark indicating matching between the vehicle wheel and the tire.

As described above, in the method of supplying the marking paint for attaching the marking paint to the transfer surface of the marking jig using the stamp stand, the transfer surface of the marking jig is pressed many times to a specific position of the stamp stand. As a result, the amount of the marking paint in that portion decreases, and the marking paint adhered to the transfer surface of the marking jig becomes insufficient, resulting in defective marking. Therefore, by supplying the marking paint as needed from a paint tank storing the marking paint, and appropriately replenishing the marking paint at a position where the marking jig of the stamp table is pressed, appropriate marking is performed. .

[0004]

However, since the process of forming a phase mark on an automobile wheel is generally performed under normal temperature and normal pressure, the above-mentioned marking paint existing on a stamp base is not suitable for the time required for forming the phase mark. As the change proceeds, the volatile components of the paint evaporate, and the viscosity of the paint increases. Due to this increase in viscosity, the marking paint did not sufficiently adhere to the transfer surface of the marking jig, and marking defects of the phase mark were likely to occur. Further, even if the marking paint is appropriately supplied to the stamp base as described above, a viscosity difference occurs between the supplied marking paint and the high-viscosity marking paint remaining on the stamp base. Since both the marking paint and the high-viscosity marking paint will adhere to the transfer surface of the marking jig,
When forming a phase mark for an automobile wheel, problems such as blurring of the phase mark and insufficient size of the phase mark tend to occur, and the marking defect rate tends to be relatively high.

Further, in the conventional method for supplying a marking paint using such a stamp table, even if the work process is automated for the purpose of rationalization such as labor saving, the defect of the marking paint occurs as described above. , Because the production efficiency decreases
It became necessary to take measures such as arranging an operator for adjusting the viscosity of the marking paint, and this was one factor that resulted in an increase in manufacturing cost. In addition, in order to adjust the viscosity of the marking paint, it is necessary to appropriately replenish the diluent of the paint. However, a problem such as a change in the mark defect rate depending on the skill of a worker in charge may occur.

Further, in the method for supplying a marking paint using the stamp table as described above, the stamp table is partially deformed by pressing the transfer surface of the marking jig onto the stamp table. Since the marking paint does not sufficiently adhere to the transfer surface of the marking jig,
Only about 60% of the supply amount of the marking paint is used, which causes further marking defects, increases the cost of the paint, and the like, making it difficult to form an appropriate phase mark. An object of the present invention is to solve such a problem.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a marking jig for forming a phase mark by transferring a marking paint adhered to a transfer surface to a predetermined portion of an automobile wheel.
In a method of supplying a marking paint to the transfer surface, the method includes a paint transfer table having a surface on which a copying concave portion communicating with a suction device is formed, and a support sheet intermittently running on the paint transfer table. A storage groove generating step of copying the carrier sheet onto the inner surface of the copying concave portion, a supply step of supplying a predetermined amount of marking paint to the storage groove, and inserting a marking jig into the storage groove to apply a marking paint on the transfer surface. And a marking jig,
After moving the transfer surface to contact a predetermined portion of the vehicle wheel, release the suction action of the suction device,
And an updating step of moving the carrying sheet by a predetermined amount is sequentially performed (means of claim 1).

As described above, as a method of supplying the marking paint, the storage grooves on the carrier sheet for supplying the marking paint are formed by sequentially executing the four steps of the storage groove generation step, the supply step, the transfer step, and the update step. Each time the marking paint is applied to the transfer surface of the marking jig, it is formed on a new portion of the carrier sheet, and the new marking paint is supplied to the storage groove. Since the marking paint is constantly updated, a marking paint having an appropriate viscosity can always be used, and the defective marking rate can be reduced.

In the storage groove generating step, the suction device communicating with the inner surface of the copying concave portion provided on the surface of the paint transfer table in a state where the supporting sheet intermittently running on the paint transfer table is stopped. By performing the suction operation, the support sheet is brought into close contact with the inner surface of the copying concave portion to generate a storage groove. Here, since the storage groove stores the marking paint for attaching the marking paint to the transfer surface of the marking jig in the transfer process, it is necessary to form an appropriate phase mark on the transfer surface of the marking jig. It is necessary to have a size capable of adhering a required amount of marking paint to the ink, and it is necessary to appropriately adjust the depth and shape of the storage groove according to the shape of the transfer surface. For example, if the transfer surface has a hemispherical shape, the inner surface of the concave portion of the paint transfer table surface is configured so that the storage groove forms a hemispherical shape of a similar shape slightly larger than the shape of the transfer surface, and an appropriate amount of marking paint is applied. You may make it adhere to a transfer surface.

Since the marking paint is supplied to such a storage groove in a supply step described later, it is necessary to form the storage groove so that the marking paint can be appropriately supplied. A storage groove is formed in such a manner that the carrier sheet is brought into close contact with the recess by the suction operation of the suction device. As a suction operation by such a suction device, for example, a suction hole or the like communicated with the suction device is provided on the inner surface of the copying concave portion, and the suction device does not tear the carrier sheet and fits closely to the inner surface of the copying concave portion. The storage groove may be formed such that the suction operation is performed by force. Further, a plurality of such copying concave portions may be provided on the surface of the paint transfer table, and by this, it is possible to simultaneously generate the storage grooves in the plurality of copying concave portions. It may be possible to use the number of paint colors corresponding to the copying concave portion at a time, or to provide an advantage that phase marks can also be formed on a plurality of automobile wheels in a simultaneous sequence.

Next, in the supply step of supplying the marking paint into the storage groove, it is ideal that all the marking paint by one supply adheres to the transfer surface of the marking jig and is marked on the automobile wheel. It is. Therefore, when the transfer surface of the marking jig is inserted into the storage groove, it is desirable to supply the storage groove with an amount of paint capable of adhering the marking paint to the entire transfer surface. In practice, the size of the storage groove is adjusted to the size of the transfer surface of the marking jig, the viscosity of the marking paint is adjusted, etc. To supply. As a method of supplying such a marking paint to the storage groove, for example, a method of supplying the marking paint from a storage tank or the like through a discharge valve or the like may be used, or, from a marking paint storage tank, a dropper or the like. It is also possible to use a method of once sucking and supplying to the storage groove.

Next, in the transfer step described above, the marking jig that has moved after forming the phase mark on the automobile wheel inserts the transfer surface into the storage groove to which the marking paint has been supplied in the supply step. Transfer the marking paint. Here, in order to sufficiently display the phase point, it is desirable that the marking paint adhere to the entire area of the transfer surface.

Next, as the above-mentioned renewal step, after the marking jig which has adhered the marking paint to the transfer surface in the transfer step removes the transfer surface from the storage groove, the suction device which has generated and held the storage groove is used. The suction operation is stopped, the carrier sheet is moved by a predetermined amount so that a new portion of the carrier sheet is placed on the paint transfer table, and the process proceeds to the storage groove generation step again. In this case, the marking paint remaining in the storage groove moves along with the storage groove trace.

As a method for moving the carrier sheet as described above, the carrier sheet is wound in advance, and the paint is transferred from the sheet roll body supported on the roll shaft without the carrier sheet being cut in the sheet roll. It is proposed that the vehicle be pulled out so as to pass over a table and intermittently run so as to move by a predetermined amount at a predetermined timing in an updating process (means of claim 2). Since the carrier sheet is used by being pulled out from the sheet roll onto the paint transfer table,
It is desirable to move the support sheet without breaking. In addition, the moving amount of the carrier sheet needs to be at least such that the trace of the storage groove used in the transfer step does not overlap with the new storage groove generated in the next storage groove generation step. As a feed mechanism for moving such a carrier sheet, for example, a configuration may be adopted in which the carrier sheet is sandwiched between rollers from above and below, and the carrier sheet is moved by rotating the rollers, or another roll shaft member The support sheet may be moved by winding the support sheet around the support sheet.

As such a supporting sheet, a vinyl sheet is proposed (means of claim 3). The supporting sheet is excellent in elasticity enough to cope with adhesion to the concave portion by suction, and excellent in copying property to the inner surface of the concave portion provided on the surface of the paint transfer table, and each of the supply methods of the marking paint according to the present invention. In the process, it is desirable to have strength enough not to tear, and to be relatively inexpensive. As such, a vinyl sheet is preferably used. As a substitute for the vinyl sheet, for example, a film made of polyethylene or the like may be used.

The above-described four steps of the storage groove generation step, the supply step, the transfer step, and the renewal step are related to each other, and are sequentially and repeatedly operated, so that an appropriate phase mark is set at the phase point of the vehicle wheel. Supply of the marking paint for forming is performed. In order for these four steps to proceed efficiently, for example, a marking jig having a transfer surface to which the marking paint is applied in the transfer process forms a phase mark on a predetermined automobile wheel, and then attaches the marking paint again. The operation time of each step can be set so that the update step, the storage groove generation step, and the supply step are completed before the transfer step.

After the phase mark is formed on the vehicle wheel, a step of cleaning the transfer surface of the marking jig may be provided before the marking jig moves to the next transfer step. Accordingly, the marking paint remaining on the transfer surface after the phase mark is formed can be removed, so that there is an advantage that only a new paint can be used at the time of forming the next phase mark. As such cleaning, cleaning with a solvent, cleaning with an ultrasonic wave, or the like can be used.

On the other hand, in a supply source where the marking paint to be supplied to the storage groove is stored, the marking paint is stored using a shielding paint tank or the like so that the viscosity of the marking paint does not increase with time. It is also proposed to supply the grooves (means of claim 4). As described above, by using the shielding paint tank as a supply source of the marking paint, the marking paint can be prevented from directly contacting the outside air, so that the volatile components of the marking paint can be prevented from being vaporized. Further, in order to maintain the viscosity of the marking paint in the shielding paint tank properly, for example, a circulation pump is provided in the shielding paint tank, or equipment for applying heat to maintain a constant temperature is provided. You can also do it.

According to the method for supplying a marking paint according to the present invention, a marking paint for forming a phase mark on an automobile wheel can always be kept in an appropriate viscosity state, so that occurrence of defects due to defective marking can be reduced. Will be able to

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. 1 and 2 show a specific example of a marking paint supply apparatus using the marking paint supply method according to the present invention.

FIG. 1 is a top view of the marking paint supply device 1. The marking paint supply device 1 has a surface on which a copying concave portion 3 having a suction hole 4 communicating with a suction device (not shown) is provided. 2, a supporting sheet 5 that is copied and adhered to the inner surface of the copying concave portion 3, and a sheet roll 6 that is loosely supported on a roll shaft, and the supporting sheet 5 is pulled out from the sheet roll 6, and the paint transfer table 2 is drawn. A feed roller 8 for intermittently running above, a support sheet feed motor 9 for driving the feed roller 8, and a support sheet 5 moving on the paint transfer table 2
And a tension roller 7 for applying tension to the roller. Further, the marking paint supply device 1 is also provided with an ultrasonic cleaning device 10 for cleaning the transfer surface 17 after the marking jig 11 forms the phase mark and before the transfer to the transfer process again. This marking jig 11
The marking paint supply device 1 moves between the marking paint supply device 1 and a device that detects the phase point of the vehicle wheel and executes the formation of a phase mark. To form a phase mark on the vehicle wheel.

FIG. 2 is a sectional view taken along the line AA ′ of FIG. 1. In the marking paint supply device 1, a storage groove 12 formed by copying the inner surface of the copy concave portion 3 on the paint transfer table 2 is formed. A shielding paint tank 14 having a paint discharge valve 13 for supplying a marking paint is provided, and the marking paint is supplied from the shielding paint tank 14 to the storage groove through a discharge nozzle 15 by the paint discharge valve 13. You. The shielding paint tank 14 is provided between the outside air and the shielding paint tank 14.
It blocks marking paint inside. A circulation pump 18 is connected to the shielding paint tank 14,
The circulation pump 18 keeps the viscosity of the marking paint at an appropriate level. Further, the circulation pump 18 is connected to a storage tank (not shown) for the marking paint, and a facility capable of appropriately supplying the marking paint from the storage tank so that the shielding paint tank 14 can always store and maintain a predetermined amount. It may be arranged.

Next, the operation of the marking paint supply device 1 will be described with reference to FIGS. First, a storage groove generation step of generating the storage groove 12 for storing the marking paint will be described with reference to FIG. After moving by a predetermined amount on the paint transfer table 2 by the feed roller 8, the stationary supporting sheet 5 is sucked by a suction device (not shown) communicating with the hemispherical copying concave portion 3 formed on the surface of the paint transfer table 2. By operation (indicated by an arrow), the gas is sucked from the suction hole 4 provided in the concave portion 3, imitates and contacts each inner surface of the concave portion 3, and the storage groove 12 is generated. When the storage groove 12 is generated, the tension roller 7 is adjusted so that an appropriate tension is applied so that excessive tension is not applied to the support sheet 5 and the support sheet 5 is not broken.

Next, a supply step of supplying the marking paint to the storage groove 12 generated in the storage groove generation step will be described with reference to FIG. When the storage groove 12 is generated, a predetermined amount of the marking paint is discharged from the shielding paint tank 14 storing the marking paint to the storage groove 12 from the shielding paint tank 14 which stores the marking paint. It is supplied to the storage groove 12. Here, the paint discharge valve 13 may discharge the marking paint through a discharge nozzle 15 extending to the vicinity of the storage groove 12 so that the marking paint does not leak from the storage groove 12 when discharging the marking paint. . Since the storage grooves 12 shown in the present embodiment are formed at three places, three sets of the shielding paint tank 14 and the paint discharge valve 13 may be provided so as to correspond to each of the storage grooves 12. If the same paint is used, the marking paint may be supplied to each storage groove 12 from one shielding paint tank via three paint discharge valves 13.

Next, a transfer process for attaching the marking paint stored in the storage groove 12 to the transfer surface 17 of the marking jig 11 will be described with reference to FIG. A marking jig 11 having a phase mark formed on an automobile wheel cleans the transfer surface 17 with the ultrasonic cleaning device 10 and moves to the marking paint supply device 1. By the supply process described above, the marking jig 11 moves to the upper region of the storage groove 12 in which the marking paint is stored, and the transfer surface 17 of the marking jig 11 descends toward the storage groove 12 to store the transfer surface 17. It is inserted into the groove 12 to allow the stored marking paint to adhere. At this time, the transfer surface 17 may be pressed against the storage groove 12 by a predetermined pressure appropriately set according to the type and viscosity of the marking paint so that an appropriate amount of the marking paint adheres to the transfer surface 17. In the present embodiment, a similar transfer process is performed in a simultaneous sequence on other storage grooves 12 not shown in FIG.

Next, with reference to FIG. 6, a description will be given of a process of updating the carrier sheet 5 constituting the storage groove 12. FIG. The transfer surface 17 on which the predetermined amount of the marking paint is adhered rises by the transfer process, and the marking jig 11 moves to form a phase mark on a predetermined vehicle wheel. Synchronously, the suction operation of the suction device is stopped, and the feed roller 8 is driven to move the storage portion 16 which is the trace of the storage groove 12 away from the paint transfer table 2, and a new portion of the support sheet 5 is placed on the paint transfer table 2. The support sheet 5 is moved by a predetermined amount so that At this time, an appropriate tension is applied to the carrier sheet 5 by the tension roller 7 so that a new portion of the carrier sheet 5 is arranged at an appropriate position on the paint transfer table 2. After the renewal process is completed, the process returns to the storage groove generation process.

The above-described four steps of the storage groove generation step, the supply step, the transfer step, and the renewal step operate in association with each other, so that the supply of the marking paint can be performed smoothly and promptly as a whole. It is efficient. For example, in a renewal process, after the marking jig 11 having the marking paint adhered to the transfer surface 17 forms a phase mark on a predetermined automobile wheel, the transfer surface 17 is cleaned by the ultrasonic cleaning device 1.
In accordance with the timing of cleaning at 0 and the transfer to the transfer process in order to attach the marking paint again, the above-described renewal step, storage groove generation step, and supply step proceed, and the marking paint is supplied to the new storage groove 12. In this way, the time required for marking the phase points can be used efficiently.

On the other hand, in the transfer step, the marking paint remaining without adhering to the transfer surface 17 of the marking jig 11 moves with the movement of the carrier sheet 5 in the update step, as shown in FIG. The portion of the support sheet 5 having the storage section 16 to which the used marking paint is adhered may be discarded, or may be washed and reused. Here, it is also proposed to make the upper feed roller 8 circular or rectangular so that the marking paint remaining on the support sheet 5 does not contact the marking paint supply device 1.

The present invention is not limited to this embodiment, and it does not depart from the gist of the present invention.
It can be implemented in various forms.

[0030]

According to the present invention, as a method of supplying a marking paint for forming a phase mark of an automobile wheel, a storage groove is provided by closely contacting a supporting sheet with a copying concave portion provided on a paint transfer table. After supplying the marking paint, the transfer surface of the marking jig is inserted into the storage groove to attach the marking paint, and then the carrier sheet is moved by a predetermined amount to form a new storage groove again. Since the repetition progresses, the marking paint to be attached to the transfer surface of the marking jig that forms the phase mark is always the newly supplied marking paint. Thus, a stable marking paint can be supplied, and the defective marking rate can be reduced.

In the apparatus according to the conventional method, a step of diluting the marking paint by an operator was required due to defective marking due to an increase in the viscosity of the marking paint, whereas the apparatus according to the present invention always required an appropriate viscosity. Since the marking paint is supplied, the problem caused by the defective marking is eliminated, so that the marking device for the phase point of the vehicle wheel can be saved in labor and the production cost can be expected to be reduced.

By using a carrier sheet that moves intermittently from a winding roll around which a long sheet is wound as a storage groove for supplying the marking paint according to the present invention, a sheet supply operation accompanying the generation of the storage groove is used. In addition, the carrier sheet portion having the marking paint remaining without adhering to the transfer surface of the marking jig is automatically processed, which leads to a reduction in labor costs. Further, by using a relatively inexpensive vinyl sheet as a carrier sheet having excellent elasticity in order to generate a storage groove suitable for supplying a marking paint, it is possible to suppress the production cost.

[Brief description of the drawings]

FIG. 1 is a top view of a specific example of a marking paint supply device according to a marking paint supply method according to the present invention.

FIG. 2 is a sectional view taken along line A-A 'of FIG.

FIG. 3 is a progress diagram in a specific example of a storage groove generation step according to the present invention.

FIG. 4 is a progress diagram in a specific example of a paint supply step according to the present invention.

FIG. 5 is a progress diagram in a specific example of a paint transfer process according to the present invention.

FIG. 6 is a progress diagram in a specific example of a carrier sheet updating step according to the present invention.

FIG. 7 is a specific example showing the movement of the carrying sheet in the updating step according to the present invention.

[Explanation of symbols]

 2 paint transfer table 3 copying concave portion 5 supporting sheet 6 sheet roll body 8 feed roller 11 marking jig 12 storage groove 14 shielding tank 17 transfer surface

Claims (4)

[Claims] 1. A method of supplying a marking paint to a transfer surface of a marking jig for forming a phase mark by transferring a marking paint attached to a transfer surface to a predetermined portion of an automobile wheel. A coating transfer table formed on the surface with a copying concave portion communicating with the apparatus, and a supporting sheet intermittently running on the paint transferring table, and a storage groove for copying the supporting sheet to the inner surface of the copying concave portion by suction of a suction device. A generating step, a supplying step of supplying a predetermined amount of a marking paint to the storage groove, a transfer step of inserting a marking jig into the storage groove and attaching the marking paint to a transfer surface thereof, and further comprising the marking jig After the transfer surface is moved to bring the transfer surface into contact with a predetermined portion of the vehicle wheel, the suction operation of the suction device is released, and the carrying sheet is moved by a predetermined amount. A method for supplying a marking paint for an automobile wheel, the method comprising: 2. A renewal process is performed by supporting a sheet roll body formed by winding a support sheet in a roll shape on a roll shaft, extracting the support sheet from the sheet roll body, and running the sheet intermittently on a paint transfer table. The method according to claim 1, wherein the method is performed. 3. The method according to claim 1, wherein the support sheet intermittently running on the transfer table is a vinyl sheet. 4. The marking step according to claim 1, wherein in the supplying step of supplying a predetermined amount of the marking paint to the storage groove, a marking paint having a predetermined viscosity is supplied from a shielding paint tank. A method for supplying a marking paint for an automobile wheel according to any one of the above.