JPH08155812A - Automatic dry sanding device - Google Patents

Abstract

PURPOSE: To provide a dry sanding device used in the polishing process of coating such as electrodeposition coating so as to automatically polish and eliminate seeds and the like on the coated surface. CONSTITUTION: Plural pressure pads 14 supported elastically are disposed opposedly to the workpiece surface B, and abrasive cloth 27 is pressed to the workpiece surface B by the pressure pads 14. The pressure pads 14 are oscillated in the approximately parallel direction to the workpiece surface B, and polishing is performed by the abrasive cloth 27 moved following vibration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic air-polishing apparatus, and more particularly to an apparatus for polishing and removing dust and dirt on a coated surface, which is used in a polishing step of coating such as electrodeposition coating.

[0002]

2. Description of the Related Art In various fields such as automobile manufacturing, the surface of a product is coated for the purpose of preventing rust and imparting an aesthetic appearance. Generally, a paint is not a single material and cannot satisfy all required performances.
By using several materials properly and applying them several times, various performances can be satisfied as a comprehensive coating film. For example, the coating of the outer skin of an automobile body is generally
It is a coating of (pretreatment,) undercoating, intermediate coating and topcoating on the steel plate base in order.Pretreatment and undercoating are for rust prevention, and intermediate coating is for surface adjustment to improve the finished appearance.
The topcoat is mainly responsible for the finish appearance and durability and is responsible for the coating performance.

By the way, in the case where the coatings are applied repeatedly in this manner, a polishing process is provided between each coating process to correct defects on the coating surface such as dust and lumps, and to improve the final coating quality. ing.

Conventionally, for example, to remove foreign matter such as dust and iron powder existing on the surface of a work after electrodeposition coating, sandpaper is put under a folded waste cloth and the coated surface is lightly rubbed (rough sand). ) Was done by.

A rotary brush is generally used for polishing the coated surface. For example, a manual horizontal rotary brush is locally used, and an automatic vertical rotary brush is entirely used.

Regarding the "grinding process", Vol. 19 of the Automotive Engineering Manual, the method of manufacturing automobiles (April 2, 1980)
No. 196, page 197 (issued by Sankai Co., Ltd.), item 8.2.4 undercoat sharpening (sanding) and item 8.2.6 intermediate coating sanding (sanding).

[0007]

However, the manual polishing is not efficient, and since a great work load is put on the worker, automation is desired. Further, as the rotating brush, a nylon brush that has been ground is generally used, but the amount of grinding powder that is released during polishing and adheres to the surface of the work is large, and in the water laboratory where water washing is performed in the next step, It could be used, but it could not be used for Kuken. Further, when a rotating brush is used, it is impossible to perfectly follow the curved surface of the body. When trying to follow the whole surface of the body, there is a portion where the polishing pressure becomes strong, and there is a possibility that the coating film may be completely peeled off at that portion, which has a large effect on rust prevention quality and the like. .

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve the above-mentioned problems and to provide an automatic air-polishing apparatus capable of operability by automation and excellently removing foreign matters on a coated surface by polishing.

[0009]

The present invention, which solves the above-mentioned problems, is an automatic air-polishing apparatus for polishing a work surface, which can be varied in a direction substantially perpendicular to the work surface by following the shape of the work surface. A plurality of pressing pads placed opposite to the work surface, the polishing pad is pressed against the work surface by the pressing pad, and the pressing pad is swung in a direction substantially parallel to the work surface. The automatic air-polishing device is characterized in that polishing is performed by a polishing cloth that moves following the swing.

The present invention relates to an automatic aerial polishing apparatus in which the pressure pad is of a pressure type utilizing a load. The present invention also shows an automatic aerial polishing apparatus in which the pressing pad is of a pressing type using an elastic member.

According to the present invention, there are provided a reciprocating portion arranged substantially parallel to a work surface and a plurality of rods each having an axis line substantially perpendicular to the work surface and arranged apart from each other, A support rod that is freely or elastically movable in a direction substantially perpendicular to the work surface, and is restricted in a direction substantially parallel to the work surface to apply a pressing force locked to the reciprocating portion; and the support rod. A plurality of pressing pads that are attached to the tip portion facing the work surface and are spaced apart from each other; holding means that holds a strip-shaped polishing member between the work surface and the pressing pad; It has a swing mechanism for swinging the reciprocating portion in a direction substantially parallel to the work surface, and a displacement mechanism for displacing the reciprocating portion in a direction substantially perpendicular to the work surface. It illustrates an automatic polishing apparatus according to.

Further, the present invention shows an automatic pneumatic laboratory device in which the pressing pad is rotatably supported by the support rod. Further, according to the present invention, a plurality of dust suction pipes connected to the exhaust mechanism are movably or elastically held in a direction substantially perpendicular to the work surface and arranged in parallel with the pressing pad. It shows a sky-laboratory device.

According to the present invention, the area of the portion of each of the pressing pads contacting the polishing cloth is 6000 to 10000 mm.
^It shows an automatic air-laboratory device with a size of about ² . In the present invention, the surface shape of the portion of the pressing pad that contacts the polishing cloth is short in the direction along the first direction where the work surface has a relatively large curvature, and has a relatively small curvature orthogonal to the first direction. FIG. 3 shows an automatic air-conditioning apparatus configured to be long in the direction along the second direction.

Further, the present invention shows an automatic air-polishing device characterized by polishing with one polishing cloth. Further, the present invention provides a mechanism in which the polishing cloth holding means includes a mechanism for fixing the polishing cloth at both ends of a surface substantially parallel to the surface of the work, and swings in synchronization with the swing of the pressing pad. It shows an automatic air-laboratory device which is attached. The present invention also relates to an automatic air-polishing apparatus in which the polishing cloth is long, and a polishing cloth supply section and a polishing cloth winding section are provided before and after the holding means. .

Further, in the automatic pneumatic research apparatus of the present invention, the support rods form a plurality of sets for each plurality, and in each set, the plurality of support rods are independent of one pressure pad. And the pressure pad is formed of a flexible member at least in the surface direction, and the plurality of support rods have displacement differences in a direction substantially perpendicular to the work surface. It shows an automatic air-laboratory device which is characterized by being displaceable.

Further, in the present invention, the area of the portion of each of the pressing pads contacting the polishing cloth is 6000 to 500000.
It shows an automatic air-conditioning apparatus having a size of about mm ² . In the present invention, the part of the pressure pad that contacts the polishing cloth is
1 is a view showing an automatic air-laboratory device characterized by being constituted by an elastic material body.

According to the present invention, there is further provided a pressure portion displacement difference adjusting mechanism for adjusting a displacement difference between a plurality of support rods connected to the pressure pad, which is an automatic pneumatic laboratory apparatus. It is shown.

In the present invention, the pressing pad is rotatably supported by the support rod, and in a direction substantially orthogonal to the swinging direction of the pressing pad with respect to the position supported by the supporting rod. At least one separated position is provided with a pressurizing pad rising prevention mechanism for applying elastic force or load to the pressurizing pad in a direction substantially parallel to the axis of the support rod. 2 shows an automatic air-laboratory device for use.

According to the present invention, the pressing pad is rotatably supported by the support rod, and a swinging prevention mechanism for restricting a rotation angle of the pressing pad in the swinging direction is provided. 1 shows an automatic air-laboratory device characterized by the fact that

The present invention is further characterized in that the reciprocating section and the displacement mechanism are provided for each pressing pad, and the displacement of the pressing pad with respect to the work surface can be controlled for each pressing pad. The above shows an automatic air laboratory device.

Further, the present invention is characterized in that the reciprocating portion and the displacement mechanism are provided for each of the pressing pads, and the swing width of each pressing pad and the interval between the pressing pads are variable. It shows an automatic air laboratory device.

The present invention also relates to an automatic air-polishing apparatus characterized in that a polishing cloth is arranged for each pressing pad and a plurality of polishing cloths are used for polishing. In the present invention, a holding means for the polishing cloth is provided for each of the pressing pads, the holding means includes a mechanism for fixing the polishing cloth at both ends of each pressing pad, and The polishing cloth is provided with a mechanism for rocking in synchronization with the rocking, the polishing cloth is long, and the polishing cloth supply section and the polishing cloth winding section are arranged before and after the holding means. Is provided, the polishing cloth fixing mechanism of the holding means is displaceable in the thickness direction of the pressing pad, and a state in which the contact between the polishing cloth and the pressing pad is dissociated. 1 shows an automatic air-polishing apparatus characterized in that the polishing cloth can be sequentially updated.

The present invention further shows an automatic air-polishing apparatus characterized by being provided with a mechanism for removing the polishing powder adhering to the polishing cloth. Further, the present invention is characterized in that the pressurizing pad is formed with an intake flow passage connected to an exhaust mechanism, and an opening portion of the intake flow passage is provided in a portion of the pressurizing pad that contacts the polishing cloth. The above shows an automatic air laboratory device.

[0024]

As described above, in the automatic air laboratory apparatus of the present invention,
A plurality of pressure pads, which can be moved in a direction substantially perpendicular to the work surface following the shape of the work surface, are arranged facing the work surface, and the polishing pad is pressed against the work surface by the pressure pads. Since the pressing pad is oscillated to perform polishing, even if the surface shape is not completely flat as in an automobile body but slightly curved, the shape followability is good and automatic The whole can be polished uniformly by operation. Further, since the plurality of pressing pads are provided as described above, the entire surface can be polished by only giving a small swing, and the easiness of designing and reliability of the apparatus are improved. Further, in the present invention, since polishing is performed using a polishing cloth, the amount of the polishing powder that is released during the polishing and adheres to the surface of the work is small, and it is possible to sufficiently cope with the air polishing.

Here, as a form in which the plurality of pressure pads can be moved in a direction substantially perpendicular to the work surface following the shape of the work surface and a predetermined pressing force is applied, the pressure pads are A pressure method that uses an elastic member that locks to the holding portion of the pressure pad via a support shaft that has an elastic member such as a coil spring or an air cylinder, or the support shaft movably locks to the holding portion. However, it is possible to employ a pressurizing method utilizing the weight of the support shaft or the pressure pad or the weight of the weight attached to the support shaft. The method of applying pressure using an elastic member can be adopted regardless of the direction of the work surface to be polished, that is, regardless of whether it is a horizontal surface or a vertical surface, but in order to obtain a strictly constant pressing force. Must maintain a constant displacement of the spring etc., which requires very fine position control between the work surface and the pressure pad, which complicates the device configuration and makes it expensive to operate. It may be complicated. On the other hand, the pressurizing method using a load such as a weight can be adopted only for polishing a substantially horizontal surface, but a constant pressing force can be easily obtained.

Further, in the automatic aerial polishing apparatus of the present invention, a plurality of reciprocating portions arranged substantially parallel to the work surface and a plurality of axes each having a substantially vertical axis to the work surface are arranged apart from each other. A support rod for freely or elastically changing in a direction substantially perpendicular to the work surface, while restricting the change in a direction substantially parallel to the work surface and applying a pressing force locked to the reciprocating portion. When,
A plurality of pressing pads attached to the tip of the support rod facing the work surface and spaced apart from each other, and holding means for holding the strip-shaped polishing member between the work surface and the pressing pad. And a swinging mechanism for swinging the reciprocating portion in a direction substantially parallel to the work surface,
By adopting a configuration having a displacement mechanism for displacing the reciprocating portion in a direction substantially perpendicular to the surface of the work, a predetermined swing motion can be easily applied to the plurality of pressing pads, and the work is, for example, an automobile. Even if it has a complicated structure such as a body, the work is transferred to the line where this automatic air-conditioning device is installed, and the relative position between the work and the automatic air-conditioning device is changed. Macroscopic unevenness in direction, for example, bonnet part → roof part →
By displacing the reciprocating portion (pressing pad portion) according to the height difference of the trunk portion, it is possible to easily polish each portion of the work surface.

Further, in the automatic air-polishing apparatus of the present invention, when the pressing pad has a so-called swinging function which is rotatably supported by the supporting rod, the shape following property of the work surface is further improved. Since it is improved and the weight can be uniformly applied without hitting the edges, occurrence of polishing defects such as line scratches can be suppressed.

Further, in the automatic air-polishing apparatus of the present invention, a plurality of dust suction pipes connected to the exhaust mechanism are elastically or variably held so as to face the surface of the work and arranged in parallel with the pressing pad. Then, the grinding powder generated by polishing can be removed, and the empty grinding operation can be improved. Further, since the dust removal by the dust suction pipe can be performed from the back side of the polishing cloth (the side not contacting the work surface), there is no possibility that the tip of the dust suction pipe directly contacts the work surface, and the contact of the coated surface There are no defects such as scratches.

Further, in the automatic air-polishing apparatus of the present invention, as described above, the area of the portion of each pressing pad which contacts the polishing cloth has a large pressing force per unit area under the same load, and the polishing force is increased. From the standpoint of improving and following the shape of the automobile body,
It is desirable that the size is as small as about 0000 mm ² . This is because when the area exceeds 10,000 mm ² , the shape of the surface of the automobile body B cannot be sufficiently followed, and the polishing cloth to be pressed cannot be sufficiently brought into close contact with the surface of the automobile body B, and swinging / There is a risk of rattling during polishing, while the area is 6000 mm ²
If it is significantly smaller, the contact efficiency will deteriorate,
This is because it becomes necessary to arrange a very large number of pressure pads.

Further, the surface shape of the portion of the pressing pad which comes into contact with the polishing cloth is short in the direction along the first direction of the work surface having a relatively large curvature, and the surface shape of the portion having a relatively small curvature orthogonal to the first direction. When it is configured to be long in the direction along the two directions, sufficient pressurizing force for obtaining a good polishing force can be obtained, and at the same time, the shape followability with respect to the work surface is further improved.

Further, in the automatic air-polishing apparatus of the present invention, since it is possible to bring one polishing cloth into contact with the surface of the work piece by means of the plurality of pressing pads and polish it, a long polishing cloth is used. By disposing the polishing cloth supply section and the polishing cloth winding section before and after the polishing cloth holding means, it is possible to continuously replace the polishing cloth portion used in the polishing section and having deteriorated performance,
Operability is improved.

Further, the polishing cloth holding means has a mechanism for fixing the polishing cloth at both ends of a plane substantially parallel to the surface of the work, and a mechanism for swinging in synchronization with the swing of the pressing pad. When the polishing cloth is attached, the polishing cloth is prevented from being misaligned or dulled at the time of polishing, and local polishing defects due to these are prevented.

Further, in the automatic aerial polishing apparatus of the present invention, as described above, the size of the pressing pad is preferably relatively small from the viewpoint of improving the pressing force, the polishing force, and the shape following ability. On the other hand, the number of required pressure pads may increase, leading to an increase in failure rate and complicated control. Therefore, in another embodiment of the present invention, a plurality of sets are formed on the support rods for each set, and in each set, the plurality of support rods are independent of each other for one press pad. A structure in which the pressing pads are connected to each other and are formed by a member having flexibility at least in a plane direction, and the plurality of support rods can be displaced with a displacement difference from each other in a direction substantially perpendicular to the work surface. I take the. By doing so, even if the area of the pressure pad is relatively large, the shape followability of the pad is good, the number of pressure pads is reduced, the failure rate is reduced, and the control is simplified. You can expect it. in this case,
The area of the portion of the pressing pad contacting the polishing cloth,
It is desirable to be about 6000 to 500000 mm ² .

In addition, when the area of the pressure pad is increased as described above, if the portion of the pressure pad that contacts the polishing cloth is made of an elastic material such as sponge, The conformability to the shape of the surface is further improved, and the size of the pad is substantially free from the limitation of conformability, and a convenient size can be selected according to the size of the work.

Further, when a plurality of support rods are connected to one pressure pad as described above, if a part of the pressure pad protrudes from the end of the work during polishing, excessive bending of the pressure pad may occur. There is a possibility that the pressing force will increase due to the decrease in the contact area, and the edge will be sharpened at the end portion and line scratches will occur due to the increase in the pressing force.However, in the present invention, a plurality of pressure pads are connected. If a pressurizing portion displacement difference adjusting mechanism that adjusts the displacement difference between the support rods is provided, such a problem can be prevented from occurring.

In the automatic pneumatic laboratory apparatus of the present invention, the pressing pad is rotatably supported by the supporting rod, and the swinging direction of the pressing pad is substantially the same as the swinging direction of the pressing pad with respect to the position supported by the supporting rod. At least one position separated in the orthogonal direction is provided with a press pad rising prevention mechanism that applies an elastic force or load to the press pad in a direction substantially parallel to the axis of the support rod. As a result, it is possible to prevent the pressing pad from rising due to the frictional force in the polishing step, and it is possible to carry out uniform polishing.

In the automatic pneumatic laboratory apparatus of the present invention, the pressure pad is rotatably supported by the support rod, and a swinging prevention mechanism for restricting the rotation angle of the pressure pad in the swinging direction is provided. With the provision of, it is possible to prevent a problem such as rattling or twisting of the pressing pad when swinging, and it is possible to carry out uniform sharpening.

Further, in the automatic pneumatic research apparatus of the present invention, the reciprocating section and the displacement mechanism are provided for each pressing pad, and the displacement of the pressing pad with respect to the work surface can be controlled for each pressing pad. With this, the device can be applied to a work having a part where polishing is not necessary, such as an automobile body with a sunroof.

In the automatic pneumatic laboratory apparatus of the present invention, the reciprocating section and the displacement mechanism are provided for each of the pressing pads, and the swing width of each pressing pad and the interval between the pressing pads are variable. In this case, even if the work has a part where the width is narrow, the pressure pad can polish without sticking out of the work surface, so the edge of the work edge is sharpened and line scratches are generated due to increased pressure. There is no fear of.

Further, in the automatic air-polishing apparatus of the present invention, in the case where the pressure pad having a relatively large area is provided as described above, when a polishing cloth is arranged for each pressure pad, polishing is performed between the pads. Since there is no cloth, by disposing a dust suction device at this portion, it is possible to remove dust of grinding powder generated during polishing without being limited to the shape of the polishing cloth such as mesh. In this case, the polishing cloth holding means is provided with a mechanism such as a clamp for fixing the polishing cloth at both ends of each press pad, and is provided with a mechanism for swinging in synchronization with the swing of the press pad. Further, the polishing cloth is a long one, and a polishing cloth supply section and a polishing cloth winding section are provided in front of and behind the holding means, and further, the holding means has the above-mentioned structure. The polishing cloth fixing mechanism is displaceable in the thickness direction of the pressing pad, and the polishing cloth can be sequentially updated in a state where the contact between the polishing cloth and the pressing pad is dissociated. If so, problems such as displacement, talumi, and breakage of the polishing cloth do not occur during the polishing operation and when the polishing cloth is renewed.

In the automatic air laboratory apparatus of the present invention, further,
If the polishing cloth is provided with a mechanism for removing the polishing powder adhered to the polishing cloth, the polishing cloth can be effectively used without being clogged, its durability is improved, and polishing scratches due to the adhered polishing powder are provided. It is possible to suppress the occurrence of such as.

In the automatic air laboratory apparatus of the present invention,
At the same time as polishing, the pressurizing pad is formed with an intake passage connected to an exhaust mechanism, and the opening of the intake passage is provided at a portion of the pressurizing pad that contacts the polishing cloth. It is possible to remove the polishing powder and prevent clogging of the polishing cloth.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail based on its embodiments. FIG. 1 is a front view schematically showing the construction of an embodiment of the automatic air-laboratory apparatus according to the present invention, FIG. 2 is a side view of the embodiment, and FIG. 3 is a main part construction of the embodiment. FIG. 4 is a side view showing the structure of the main part of the same embodiment, FIG. 5 is a side view showing the structure of the main part of another embodiment, and FIG. FIG. 8 is a front view schematically showing the constitution of still another embodiment, FIG. 7 is a side view of the same embodiment, FIG. 8 is a front view showing the constitution of the main part of the same embodiment, and FIG. 9 is a main view of the same embodiment. FIG. 10 is a side view showing the configuration of parts.
(A) And (b) is a reference drawing explaining the state in the work end part of the press pad, FIG. 11 is a front view which shows another main part structure of the said Example typically, FIG. 12 is a press pad. FIG. 13 is a reference view for explaining a rising phenomenon at the time of polishing, FIG. 13 is a perspective view schematically showing the configuration of a main part of still another embodiment of the automatic aerial polishing apparatus according to the present invention, and FIG. 14 is an operating state of the same embodiment. Fig. 15 is a schematic diagram for explaining the swinging phenomenon in the swinging direction during polishing of the pressure pad, and Figs. 16 (a) to 16 (d) are one embodiment of the automatic air-laboratory device of the present invention. FIG. 17 is a schematic view showing the step of updating the polishing cloth in FIG. 17, and FIG. 17 is an explanatory view showing the positional relationship of the pressing pads when polishing an automobile body using still another embodiment of the present invention.
FIG. 18 (a) is a front view schematically showing the configuration of the essential parts of still another embodiment of the automatic air laboratory device of the present invention, and FIG. 18 (b) is a bottom view of the essential part configuration.

The automatic aerial research apparatus 1 according to the embodiment shown in FIGS. 1 to 4 has a substantially horizontal plane (hood, roof,
A device for performing electro-deposition (ED coating) sharpening of a trunk lid, which has a horizontal arm part 4 attached to left and right support parts 2 via an elevating mechanism 3 so as to be vertically movable,
Further, it has a reciprocating portion 7 reciprocally mounted by a roller 6 fitted to a rail 5 formed in the axial direction of the horizontal arm portion 4.

The reciprocating portion 7 is connected and fixed to the rotary shaft 9 of the motor-equipped speed reducer 8 fixed to the upper portion of the supporting column 2 by connecting means such as a connecting rod and a crank. Therefore, when the rotary shaft 9 is rotated by the drive of the speed reducer 8 with a motor, the rotary motion is converted into a horizontal motion by the crank, the connecting rod, etc. and transmitted to the reciprocating part 7, and the reciprocating part 7 is fitted to the roller 6. The rail 5 is restricted to swing (left and right in FIG. 1).
Further, in the elevating mechanism 3, the rotating rollers 29 of the sliding portions 28 provided at both end portions of the horizontal arm portion 4 are fitted in the concave guide grooves 30 provided in the column portion 2 to slide vertically. A pulling wire 32, which is freely supported and extended from an elevating motor 30 attached to the column 2, is deflected by a plurality of pulleys 33, and the sliding portion 28 is suspended from above to reach the sliding portion 28. The horizontal arm unit 2 is lifted up and down by rotating or reversing the lifting motor. The number of swings, the swing width, and the ascending / descending speed can be set within a predetermined range by a control mechanism (not shown), and can be controlled by sending a signal from this control mechanism to each drive unit. Is desirable.

The reciprocating portion 7 is provided with a plurality of pressing pads 14 spaced apart from each other and elastically supported and attached so as to face the substantially horizontal surface of the automobile body B. .

The attachment of the pressure pad 14 in this embodiment will be described in detail. As shown in FIGS. 3 to 5, the reciprocating portion 7 has a plurality of pressure applying members each having an axis in a direction substantially perpendicular to its longitudinal direction. Cylinder for changing pad position 10
Are spaced apart from each other at regular intervals and fixed by bolting, welding, or the like, and the tip of the piston rod 11 reciprocally fitted into the cylinder 10 has a substantially inverted T shape. The connecting member 12 having the above structure is connected and fixed, and two through holes (not shown) are formed in the horizontal plate portion 12a of the connecting member 12. On the other hand, the pressure pad 14 is attached to the lower end portion, and the coil spring 16 is arranged around the axis of the pressure pad attachment rod 13 having the coil spring lower end pressing flange portion 15 slightly above it.
The upper end portion of the mounting rod 13 is connected to the connecting member 12
The horizontal plate 12a is loosely inserted into the through hole from below, the cap 17 is attached to the head of the through hole, and the attachment rod 13 is locked to the connecting member 12. The pressure pad position changing cylinder 10 is connected to a control mechanism (not shown), and the piston rod 11 can be moved back and forth by a pressure signal sent from the cylinder.

However, in the automatic air-polishing apparatus of the present invention, as long as the pressing pad 14 can be elastically supported, the coil spring 16 as described above is used instead of other elastic members such as an air cylinder and an oil. Cylinder,
Alternatively, it is possible to use a member such as rubber or elastic plastic, and it is also possible to adopt a pressurizing method using a load as in the embodiments described later.
The pressure pad position changing cylinder 10 is provided to enable engagement / disengagement between the pressure pad 14 and a polishing cloth as described later, and to facilitate various setting operations before and after the polishing operation. However, in the automatic pneumatic research apparatus of the present invention, such a member may not be provided.

Here, regarding the area of the portion 14a of the pressing pad 14 that comes into contact with the polishing cloth, the pressing force per unit area under the same load is increased, and the polishing force is improved. From the viewpoint of improving the followability, it is desirable that it is relatively small as shown in FIG. 3, and more specifically, for example, 6000 to 100.
It is desirable that it is about 00 mm ² . That is, if the area exceeds 10,000 mm ² , the shape of the surface of the automobile body B cannot be sufficiently followed, and the polishing cloth to be pressed cannot be sufficiently adhered to the surface of the automobile body B, so that the surface of the automobile body B is shaken and polished. There is a risk of rattling at times, while if the area is significantly smaller than 6000 mm ² , the contact efficiency will deteriorate and it will be necessary to arrange a large number of pressure pads. is there. Furthermore, the connection between the pressure pad 14 and the mounting rod 13 is
For example, it is desired to loosely fit a ball joint, a pin joint, or the like to rotatably support it in order to improve the shape following property.
Further, the arrangement interval of the pressing pads 14 is 100 to 3
A pitch of about 00 mm is desired in order to evenly and uniformly polish the entire surface of the automobile body B.

In addition, in the present embodiment, the surface shape of the portion 14a of the pressing pad 14 that contacts the polishing cloth is
It is configured to be long in the direction along the longitudinal direction (Y direction) of the automobile body B and short in the direction along the width direction (X direction). Generally, the curvature of the substantially horizontal plane (hood, roof, trunk lid) of the automobile body B is X
The curvature in the direction is larger than that in the Y direction. For this reason, if the pressing pads have the same area, the shape of the automobile body may be short in the direction along the X direction having a relatively large curvature and long in the direction along the Y direction having a relatively small curvature. This is desirable because it further improves the property. Even when the surface of the work to be polished is not a substantially horizontal surface of the automobile body B as in the present embodiment, the shape of the portion of the pressing pad that abuts on the polishing cloth similarly has a relatively curved surface. If it is configured to be short in the direction along the large first direction and long in the direction along the relatively small curvature orthogonal to the first direction, the same operational effect can be obtained.

Further, in the automatic air-purifying apparatus of this embodiment, as shown in FIGS. 3 to 4, a substantially L-shaped dust collecting pipe mounting sheet metal 34 is provided at a connecting portion between the pressure pad 14 and the mounting rod 13. Is also fixed at one end thereof, and a band 36 wound around the dust suction pipe 35 is fixed to the other end of the sheet metal 34. As a result, the dust suction pipes 35 connected to the exhaust mechanism (not shown) via the bellows pipes 37 are alternately arranged in parallel with the pressure pad 14, and the dust suction pipes 35 are used for the pressure pad. 14
The elastic supporting means (such as the coil spring 16) is shared and elastically supported so as to face the automobile body B. of course,
In the automatic air laboratory apparatus of the present invention, it is not always necessary to arrange such a dust suction mechanism as in the embodiment shown in FIG. 5, and it is arranged at a predetermined portion by elastic supporting means independent of the pressure pad 14. However, the above-mentioned configuration is preferable from the viewpoints of preventing the occurrence of defects due to grinding that occurs during the aerial grinding operation, and reducing the weight and simplification of the device. The dust suction pipe 35 does not come into direct contact with the automobile body B as will be described later, but is preferably made of a flexible material such as synthetic resin such as nylon or various synthetic rubbers.

Further, in the automatic pneumatic research apparatus of the present embodiment, the arms 18 extending downward from the body of the reciprocating section are respectively provided at both longitudinal end portions of the reciprocating section 7.
A polishing cloth bridging roll 19 is arranged at the lower end of the arm 18 and functions as a holding means for holding the polishing cloth 27 between the surface of the automobile body B and the pressing pad 14. There is. Further, a polishing cloth fixing / buffering mechanism 20 is provided on the arm 18 so as to face the bridging roll 19. The structure of the polishing cloth fixing / cushioning mechanism 20 is almost the same as the method of attaching the pressing pad 14, and the elasticity is provided by the position changing cylinder portion attached to the arm 18 and the coil spring connected to the lower portion thereof. Supported and engaged with the bridging roll 19 surface or polishing cloth.
It has a pressing pad portion 20a that can be detached. By including the polishing cloth fixing / buffering mechanism 20 in this way, it is possible to prevent the polishing cloth from being displaced when the polishing cloth is oscillated, and the polishing cloth is brought into close contact with the automobile body B at the start of polishing. You can get the cushion. Further, since the bridging roll 19 and the polishing cloth fixing / cushioning mechanism 20 are attached to the reciprocating section 7 to which the pressing pad 14 is attached, the bridging roll 19 and the polishing cloth fixing / cushioning mechanism 20 swing in synchronization with the swing of the pressing pad. Will be done. Incidentally, in the automatic air-polishing apparatus of the present invention, at least a plurality of elastically supported pressing pads opposed to the work surface as described above, the pressing pad and the work surface Since one or a plurality of polishing cloths, preferably one polishing cloth, is held between them and the pressing pad is swung, the work surface can be polished with the polishing cloth. It is also possible to provide a mode in which the holding means is not provided, and even if the polishing cloth is fixed and oscillated in synchronism with the oscillating movement of the pressure pad, the holding portion is connected to a swing mechanism separate from the pressure pad. It is also possible to adopt a mode.

The automatic air-polishing apparatus according to this embodiment further includes a polishing cloth supply section 21 and a polishing cloth winding section 22 on the left and right supporting columns 2, respectively. The polishing cloth supply unit 21 includes a polishing cloth supply source roll 23 and a step roll group 24 including a variable roll whose height can be adjusted in the middle, while the polishing cloth winding unit is also driven by a driving device (not shown). The polishing cloth take-up roll 25 and the stepped roll group 26 including a height-adjustable variable roll are connected to each other. As a result, in this embodiment, a long roll of polishing cloth 27 is used, and the polishing cloth supply roll 23, the step roll group 24, the bridging rolls 19a and 19b, the step roll group 26, It is possible to successively wind the rolls to the take-up roll 25, successively wind up the portion whose performance has deteriorated due to use, and supply a new portion to the polishing region (between the take-up rolls 19a and 19b), improving operability. . However, it goes without saying that the polishing cloth supply unit 21 and the polishing cloth take-up unit 22 are not used as such a continuous supply type, and a means for tension-fixing the polishing cloth, such as a clamp, is simply provided at both ends of the reciprocating unit 17, and fixed. It is of course possible to use a polishing cloth of a length and replace it one after another with deterioration. In that case, the posture of the polishing pad may be kept parallel to the polishing cloth by pulling with a wire or the like.

The variable rolls in the step roll groups 24 and 26 are used when the height of the portion to be polished in the automobile body B is different, such as a hood and a roof.
This is for adjusting the length of the polishing cloth by raising and lowering the horizontal arm portion 4 and the reciprocating portion 7 by the elevating mechanism 3 accordingly. Further, in this embodiment, the polishing cloth supply section 21 and the polishing cloth winding section 22 are provided.
Are provided on the strut portion 2 and are located below the bridging rolls 19a and 19b, but the arrangement position is not limited. For example, these are provided in the reciprocating portion 7 and the bridging rolls 19a and 19b are provided. It may be located above. When the reciprocating section 7 is provided, the weight of the reciprocating section becomes heavy, but it is not necessary to provide the stepped roll group having the variable roll as described above, and the device configuration is simplified. The polishing cloth 27 to be used is not particularly limited, but it is preferable that the polishing cloth 27 is in the form of mesh,
This is desirable because the operation of removing dust with the dust suction pipe 35 described above can be effectively performed from the back surface (the surface opposite to the contact surface with the automobile body B) side.

Using the automatic air-laboratory device having such a configuration,
The air-polishing of the electrodeposition-coated surface of the automobile body B is performed as follows.

(1) First, the automobile body B is conveyed into the automatic air-removal apparatus 1 at a constant speed by a conveyance device such as a carriage. When the automobile body B enters into the automatic air laboratory device 1, the elevating mechanism 3 is actuated, and the suspension roll 19
The polishing cloth 27 laid between a and b is the automobile body B.
The reciprocating section 7 is lowered until it comes into contact with the hood.
Along with this lowering, the pitch of the step roll groups 24 and 26 is changed to prevent the slack of the polishing cloth 27 from occurring.

(2) Then, the cylinder 10 supporting each press pad 14 is set to "out" by a pressure signal from a control mechanism (not shown), each press pad 14 is lowered to the pressing position, and the press pad 14 is used for polishing. Cloth 27 for car body B
Stick to the hood of. At this time, it is desirable that the pressing pad be pulled by a wire or the like and supported so as to be parallel to the surface of the body B.

(3) Further, the polishing cloth fixing / buffering mechanism 20 facing the bridging roll 19 is operated to fix the polishing cloth 27 between both bridging rolls 19.

(4) In this state, the speed reducer with motor 8 is operated and the reciprocating portion 7 is swung to perform polishing. At the same time, an evacuation mechanism (not shown) is operated to suck and remove foreign matters such as grinding powder scattered in the polishing area by the dust suction pipe 35.

(5) After the polishing of the hood is completed in this way, the elevating mechanism 3 is operated to move the trolley roll 19
The polishing cloth 27 laid between a and b is the automobile body B.
The reciprocating part 7 is raised to a height at which it does not come into contact with the roof. Along with this rise, the pitch of the step roll groups 24, 26 is also changed.

(6) At approximately the same time as or after the operation of (5) is completed, the speed reducer with motor 8 is stopped, and the pressure pad 1
Cylinder 10 supporting 4 is put back and fixed with polishing cloth
The fixation by the buffer mechanism 20 is released, and the initial condition is restored.

(7) When the roof of the automobile body B is transported to a fixed position under the air laboratory device, the above (1) to
The roof is polished according to the procedure of (4).

(8) When the automobile body B is transported to the roof polishing stop position, the initial conditions are restored in the same manner as in (6) above.

(9) After the automobile body B is conveyed to the trunk lowering position, the trunk is polished by the above steps (1) to (4).

(10) When the polishing work for one automobile body B is completed as described above, the initial conditions similar to the above (6) are returned to, the reciprocating section 7 is raised to a safe height, and the next step is performed. Prepare for polishing automobile body B.

(11) In the above polishing operation, when the polishing power of the polishing cloth in the polishing region (between the bridging rolls 19a and 19b) is reduced, when the initial conditions are satisfied (the above ( 6), (8) and (10)), the polishing cloth take-up unit 22 is operated to take up the required amount of polishing cloth and supply a new polishing cloth portion to the polishing area.

The elevation of the reciprocating portion 7 by the elevating mechanism 3 is performed, for example, after the vehicle body B to be polished is completely placed on the carrying device, and the shape is recognized by the vehicle type detecting mechanism including, for example, a photoelectric tube group. After that, after the automobile body B has passed the reference position, the transport speed of the transport device can be received as a pulse signal and controlled by the encoder.

An automatic air laboratory apparatus 101 in another embodiment shown in FIGS. 6 to 9 is similar to the embodiment shown in FIGS.
A device for performing electro-deposition coating (ED coating) sharpening on a substantially horizontal surface (hood, roof, trunk lid) of an automobile body B, which is attached to left and right column parts 102 via an elevating mechanism 103 so as to be vertically movable. It has a horizontal arm portion 104, and further has a plurality of reciprocating portions 107 mounted reciprocally by a roller 106 fitted to a rail 105 formed in the axial direction of the horizontal arm portion 104.

Each of the reciprocating parts 107 is connected to a rotary shaft 109 of a reduction gear with motor 108 installed on the horizontal arm part 104 via a crank and a connecting rod. Therefore, when the rotary shaft 109 is rotated by driving the speed reducer 108 with a motor, the rotary motion is converted into a horizontal motion by the crank and the connecting rod and transmitted to the reciprocating unit 107, and the reciprocating unit 107 fits the roller 106. The rail 105 is restricted to swing (left and right in FIG. 6). The lifting mechanism 103 also has the same configuration as that shown in FIGS.

Therefore, in each of the plurality of reciprocating portions 107, one pressing pad 114 faces the substantially horizontal surface of the automobile body B and moves in a direction substantially perpendicular to the substantially horizontal plane of the automobile body B. It is locked and attached as much as possible.

The attachment of the pressure pad 114 in this embodiment will be described in detail. As shown in FIGS. 8 to 9, the reciprocating portion 107 has a horizontal plate portion 110 at the lower end thereof. A plurality (three) of rod insertion holes 111 penetrating in the thickness direction are formed at regular intervals. Then, in the rod insertion holes 111,
The pressure pad mounting rod 113 is slidably inserted. The rod 113 may be, for example, a spline shaft, and a bearing fitted to the spline may be arranged on the peripheral surface of the insertion hole 111 to enhance slidability with the rod. Further, a flat pressure plate 112 is rotatably connected to the lower ends of the mounting rods 113 via ball joints, pin joints, and the like. The pressure plates 112 attached to the lower ends of the mounting rods 113 are independent from each other (that is, the ends of the adjacent pressure plates 112 are separated from each other without interfering with each other). And is composed of a relatively hard member. Further, one pressing pad 114 having a relatively large area is attached to the lower ends of the plurality of pressing plates 112. Therefore, the pressing pad 114 has a real portion in the horizontal direction even in a separated space position where the plate surface of the pressing plate 112 does not exist, and is configured to connect a plurality of pressing plates 112 that are just separated from each other. take. The pressing pad 114 is a plate-like member made of a flexible material such as rubber or soft resin (including foam such as sponge), and is deformable (flexible) at least in the plane direction. It is possible that the plurality of pressure plates 112 connected to the pressure pad 114 have a relative height difference.

Further, in this embodiment, the pressing pad 114 has a two-layer structure, and a relatively hard rubber plate is arranged on the pressing plate side to secure the diffusion of the pressing force in the surface direction and at the same time to some extent. Shape retention is given and the car body B
A relatively soft sponge plate is provided on the side, that is, the portion 114a of the pressing pad 114 that comes into contact with the polishing cloth to provide good deformability in the thickness direction as well to improve the vehicle body shape conformability. There is. Of course, even if the pressing pad does not have such a multi-layer structure, the same effect can be obtained by using a material having flexibility in the surface direction and having excellent elasticity in the thickness direction. Further, if the corners or sides on the side of the pressure pad which is in contact with the polishing cloth in the swinging direction are rounded, it is possible to prevent the polishing cloth from being broken at the ends during polishing. Desirable for.

On the other hand, this pressure pad mounting rod 113
A weight mounting seat 115 is provided at the upper end of the pressurizing pad 116, and by attaching a pressurizing adjusting weight 116 having an appropriate weight thereto, a predetermined pressing force can be applied to the pressurizing pad. There is. As the applied pressure, it is desirable to be able to uniformly apply an arbitrary surface pressure within the range of 0 to 30 gf / cm ² by the pressing pad, and the pressing adjustment weight is, for example, 0.1 kg, 0.5 kg. Can be adjusted in units of 1.0 kg.

Here, when the elastic force of the spring or the like is used to pressurize as in the embodiment shown in FIGS. 1 to 4, the displacement of the spring or the like is kept constant in order to obtain a constant pressure. Therefore, very fine lifting control is required for that purpose, and the device configuration is complicated, and there is a possibility that it will be expensive and the operation will be complicated, but as in this embodiment, load such as a weight is used. By using the pressurizing method described above, a constant pressing force can be easily obtained.

Each rod 113 is movable in a direction substantially perpendicular to the substantially horizontal plane (work surface) of the automobile body B, while on the other hand, in a direction substantially parallel to the work surface, the rod 113 is attached to the horizontal plate portion 110 of the reciprocating section 107. When the reciprocating section 107 is locked in a state in which the movement is restricted and is swung by the drive mechanism described above, each rod 1 follows this movement.
07 or the pressure pad 114 swings, but during this swinging motion, the rods 107 are moved by the vehicle body B.
It is possible to move up and down following the curved surface shape on the substantially horizontal plane. Even if there is a difference in height between the plurality of rods 107 or the pressure plates 112 connected to the pressing pad 114, the pressing pad 114 is deformed due to its flexibility, and therefore exhibits good shape following property. In the following,
The portion including the pressure plate 112 and the pressure pad 114 described above may be referred to as a pressure head.

Further, as compared with the embodiment shown in FIGS. 1 to 4, when the area of the press pad is increased and the number of the press pads themselves is reduced as in this embodiment, the failure rate is lowered and the control is reduced. Can be simplified. It should be noted that if the area of the pressing pad is simply increased, there arises a problem that the followability with respect to the shape of the automobile body B is deteriorated as described above, but the pressing pad is pressed as in the present embodiment. By dividing the above into a plurality of parts and forming the pressing pad by a flexible member, the shape followability is also improved as described above. Further, by disposing an elastic material such as a sponge plate on a portion 114a of the pressing pad 114 that comes into contact with the polishing cloth so as to have good deformability in the thickness direction, the embodiment shown in FIGS. As compared with the example, the width of the pressing pad is narrowed to improve the shape followability, so that a higher degree of shape followability can be obtained, and the size of the press pad is not substantially limited in terms of shape followability. Body B
A convenient size can be selected according to the size and the like. The size is not particularly limited, but specifically, for example, 6000 to 500000 mm
It is desirable to be about ² .

In the automatic pneumatic laboratory apparatus of this embodiment, as shown in FIGS. 8 and 11, a plurality of pressure pad mounting rods 11 connected to one pressure pad 114 are used.
A pressure unit displacement difference adjustment mechanism 140 that adjusts the displacement difference between the three is provided.

As shown in FIG. 10A, each rod 11
3 does not substantially limit the fluctuation in the vertical direction, for example, when the automatic aerial grinding apparatus is located in a place where the work width is narrow, such as in the roof portion of the automobile body B, the end of the automobile body B is When the pressure head protrudes in the width direction, the pressure head or a part of the polishing cloth pressed against the automobile body B by the pressure head falls below the substantially horizontal surface of the body B and is caught at the end of the body B. Occurs, the rocking motion is hindered, and the edge is sharpened at the end. Therefore, it is necessary to take measures to prevent such a drop, but if the load on the protruding portion is not removed at the same time, the contact area will decrease as shown in FIG. The risk of line scratches is increased by polishing.

Pressure difference displacement amount adjusting mechanism 1 in this embodiment
Reference numeral 40 denotes a position sensor unit 141 that constantly detects the height of a rod (rod 113C in FIG. 11) located above the body B, and a rod (a rod 113A and a rod 113A in FIG. 1
13B) is provided with a restricting portion 142, and the restricting portion 142 can engage with the weight mounting seat 115 provided on the upper portion of the rod 113 in the vertical direction by a cross section L. It has a character-shaped stopper portion 143 at the lower end portion, and has a structure in which it is attached to the reciprocating portion 107 so as to be able to move up and down through a mechanism such as a rack and a pinion 144.

As a result, the height of the rod (the rod 113C in FIG. 11) always located above the body B is detected by the position sensor 141, and in synchronization with this, the stopper 143 of the regulating portion 142 is set at an appropriate position. When the rods 113A and 113B are moved up and down and protrude from the end of the body B, the rod weight mounting seat 115 is hooked on the stopper portion 143, and the rods 113A and 113B are pushed.
It is possible to remove the load applied to these rods by controlling the excessive fall of B. When these rods 113A and 113B do not protrude from the end of the body B, the shape followability of the pressing pad is impaired if such a restriction is applied, so that the restriction is not generated. 143 should be located well below.

In this embodiment, it is assumed that two of the plural (three) rods 113 connected to the pressing pad 114 protrude from the end of the body B, and the two rods fall. Although it is configured to regulate the depression, of course, depending on the width of the work to be polished, etc., it is configured to regulate the depression of only one rod at the end or to regulate the depression of a larger number of rods. The configuration is arbitrary, and as the height reference rod, any rod can be selected as long as it is always located above the work surface, or the height of the work surface itself can be selected. It is also possible to adopt an aspect such as directly detecting and using as a reference. Furthermore, the structure of the restriction unit 142 is not limited to the structure shown in this embodiment. Further, such a pressurizing portion displacement difference adjusting mechanism 140 is generally provided only for the pressurizing pads on both end sides of the automatic air-polishing apparatus, which may cause a drop from the work end portion as described above. However, when a car body with a sunroof or the like is also to be polished, such a pressurizing portion displacement difference adjusting mechanism may be provided for those existing at positions facing these notches.

In the automatic pneumatic research apparatus of this embodiment, the plate-shaped pressure plate 112 is rotatably connected to the lower end of the mounting rod 113 as described above.
As shown in FIG.
A rectangular holding plate 145 centered on the axis of the mounting rod 113 is attached above the rotatable connecting portion with the pressure plate 112, and the four holding portions of the holding plate 145 face each other. Coil springs 146 are arranged between the corners of the pressure plate 112 to form a press pad rising prevention mechanism.

When the pressing pad 114 or the pressing plate 112 is rotatably connected to the mounting rod 113, as shown in FIG.
As shown in Fig. 3, the pressure head portion at the lower end of the rotating shaft exerts a force due to the moment composed of the frictional force (N) received from the polishing surface during polishing and the distance (h) from the polishing surface to the rotating shaft. There is a possibility that the pressure head portion may be lifted up on the side of the automobile body B in the conveying direction. When the pressure head or pressure pad rises in this manner, the contact area of the polishing cloth pressed against the automobile body by the pressure pad decreases, and uniform polishing cannot be achieved. This causes problems such as sharpening scratches due to abrasion and uneven wear of the polishing cloth. Therefore, by generating a moment equivalent to the generated moment in the opposite direction,
This is to prevent such rising. It should be noted that it is conceivable to make the distance (h) from the polishing surface to the rotating shaft sufficiently small so that the generated moment becomes as close to zero as possible. However, in order to improve the shape followability of the pressure pad, As described above, the pressure pad needs to be made of an elastic material such as sponge, and a certain amount of thickness is inevitably generated, so that it is considered difficult to realize this.

In this embodiment, the coil spring 146 is used.
However, the pressing pad rising prevention mechanism is substantially orthogonal to the swinging direction of the pressing pad with respect to the position supported by the mounting rod. If the elastic force or the load is applied to the pressing pad in a direction substantially parallel to the axis of the mounting rod at at least one position separated in the direction, the configuration of this embodiment is not limited. Without using any configuration, for example, as shown in FIG.
3. As shown schematically in FIG. 14, the pressurizing shaft (mounting rod) is divided into the front and rear (direction substantially orthogonal to the swinging direction) to counter the rising moment (in this case, transportation of the automobile body B). The load W ₂ on the upstream side in the direction is preferably made larger than the load W ₁ on the downstream side (W ₁ <W ₂ ). Further, a method using an elastic body such as a coil spring as described above. It is possible to employ a combination of the method of dividing the pressure axis and the method of dividing the pressure axis.

In addition, in the automatic pneumatic research apparatus of this embodiment, as shown in FIG. 8 and FIG.
Of the mounting rod 1 to the pressure plate 112 at a position separated from the connection portion of the pressure plate 112 in the direction parallel to the swinging direction.
A shaft body 147 rotatably connected to the mounting rod 113 is provided in the same manner as in No. 13, and the shaft body 147 is provided with a connecting sheet metal member 148 extending in a direction parallel to the swinging direction at an upper end portion thereof. And a swinging prevention mechanism that is fixed to the pressure pad and regulates the rotation angle of the pressing pad in the swinging direction.

When the pressing pad 114 or the pressing plate 112 is rotatably connected to the mounting rod 113 by one rotating shaft, as shown in FIG. Section), due to the frictional force received from the polishing surface and the moment consisting of the distance from the polishing surface to the rotating shaft, and the swinging kinetic force and the moment consisting of the distance from the abutting portion of the rod insertion hole 111 to the rotating shaft, A large rotation (swing) may occur, which may cause rattling or twisting of the pressing pad 114, which may cause problems such as poor sharpening and bending or bending of the polishing cloth. For this reason,
By providing a mechanism that regulates the turning angle in the swing direction, better and uniform polishing can be expected.

In the above embodiment, the rotation angle of the mounting rod 113 is regulated by additionally providing the rotation shaft in the direction parallel to the swing direction. As long as it can regulate the moving angle, it is not limited to such a configuration,
For example, in addition to this, in the direction parallel to the swinging direction, an interfering body composed of a leaf spring or the like extended obliquely downward from the mounting rod 113 is provided, and the rotation angle of the mounting rod 113 is changed. When the interference exceeds a predetermined value, the interference plate and the pressure plate 112 come into contact with each other to regulate the rotation angle, or at the rotatable connection portion between the mounting rod 113 and the pressure plate 112, It is possible to employ a configuration in which the turning angle is regulated by, for example, providing a portion that causes the shaft body to hit at a certain turning angle.

Next, the polishing cloth holding means in this embodiment will be described. In this embodiment, in FIGS.
In contrast to the embodiment shown in FIG. 5, an individual polishing pad 127 is arranged for each pressing pad 114.

That is, in this embodiment, at both longitudinal end portions of each reciprocating portion 107, an elevating or retracting arm 118 extending below the body of the reciprocating portion is provided, and the lower end of this arm 118 is provided. Is provided with a clamp 119 having a pair of opposed rolls capable of engaging and disengaging operations, and a holding means and a polishing means for holding the polishing cloth 127 between the surface of the automobile body B and each pressing pad 114. It functions as a cloth fixing and cushioning mechanism. Since the clamp 119 is attached to each reciprocating portion 107 to which each press pad 114 is attached, the clamp 119 swings in synchronization with the swing of each press pad. Further, in each reciprocating section 107, a polishing cloth supply roll 123 is attached to one end portion of the upper surface in the longitudinal direction, and a polishing cloth winding roll 125 connected to a driving device (not shown) is attached to the other end portion. Therefore, as the polishing cloth 127, a long rolled cloth is used. Then, the polishing cloth supply roll 123 passes through both the clamps 119, and the polishing cloth is sequentially wound on the take-up roll 125, and the portion whose performance has deteriorated due to use is sequentially wound up, and a new portion is placed under the pressing pad 114. We are able to supply it and improve operability. The updating of the polishing cloth is not particularly limited, but as shown in FIGS. 16 (a) to 16 (d), the arm 118 is renewed.
Of the pressure pad 114 is operated below by operating the elevating or retracting means of the.
The contact between the pressing pad 114 and the polishing cloth 127 is released (FIG. 16B), the polishing cloth of a predetermined length is wound in this state to renew the polishing cloth, and then one clamp 119 is put on the pressing pad. It is pulled up to a predetermined position above the lower surface of 114 (FIG. 16C), and then the remaining clamp 11
9 is similarly pulled up to a predetermined position above the lower surface of the pressing pad 114 (FIG. 16 (d)), so that the polishing cloth 127 is pressed against the pressing pad again. Is desirable because it can be accurately wound without being caught by a pressure pad or the like, and can prevent the polishing cloth from being displaced, tampered, or broken at the time of renewal.

However, as a matter of course, even when the pressure pad having a relatively large area is provided as in the present embodiment, all the pressure pads as in the embodiments shown in FIGS. On the other hand, it is possible to use a single polishing cloth, and instead of using such a continuous supply method, use a regular-size polishing cloth and replace it when deterioration occurs. Is also possible.

Although not shown, this clamp 119
A mechanism for detecting the tension of the polishing cloth 127 that is applied between the polishing cloth 127 and the clamp 11 is provided.
9, or polishing cloth take-up roll 125 and clamp 1
A tension adjusting mechanism including, for example, a group of step rolls is provided between the control unit 19 and the control unit 19, and a detection signal sent from this detecting mechanism is sent to the control mechanism, and based on the correction value calculated from the difference from the set value. Clamp 1 by operating the tension adjustment mechanism
It is desirable to automatically adjust the tension of the polishing cloth 127 during the period of 19 times, and additionally to add a structure that gives an abnormal signal when the polishing cloth 127 breaks. Further, the polishing cloth 12 applied between the clamps 119 is further added.
It is desirable to provide a mechanism for removing the grinding powder adhering to 7 by suction or tapping. Such an adhering grind removal mechanism is effective, for example, without causing clogging of the polishing cloth by being operated after finishing the polishing of one automobile body B and before starting the polishing of the next automobile body B. It is possible to improve the durability, and to suppress the occurrence of polishing scratches and the like due to the attached grinding powder.

Further, similarly to the embodiment shown in FIGS. 1 to 4, in the automatic air-polishing apparatus of this embodiment, as shown in FIG. 6, an exhaust mechanism (not shown) is provided between each press pad 114. The dust suction pipes 135 connected to (1) are arranged alternately in parallel with the pressing pads 114. The method for attaching the dust suction pipe 135 is not particularly limited as long as it can be flexibly or elastically held in a direction substantially perpendicular to the surface of the work. For example, an elastic body can be attached to the reciprocating portion 117. Alternatively, it may be configured such that it is mounted via a support shaft that is variably locked, and when it is mounted on the reciprocating portion in this manner, it is possible to swing it in synchronization with the pressing pad 114 that is adjacent thereto.
Of course, it can also be arranged at a predetermined site by an independent elastic support means or the like. It should be noted that the method of attaching the dust suction pipe 135 is omitted in the drawing. The dust collecting pipe 1
It is desirable that the material forming 35 is the same as that described in the above embodiment.

When an individual polishing cloth 127 is arranged for each pressing pad 114 as in this embodiment, a space is provided between the dust collecting pipe 135 disposed adjacent to the pressing pad 114 and the automobile body B. Since the polishing cloth 127 does not exist, there is no limitation that the expensive cloth cloth 127 is used as the polishing cloth 127, and the dust can be efficiently absorbed.

As a method for carrying out the air grinding of the electrodeposition coating surface applied to the automobile body B using the automatic air grinding apparatus of this embodiment, it is almost the same as the case of the equipment in the embodiments shown in FIGS. Since it is the same, the description is omitted.

FIG. 17 is a drawing schematically showing the positional relationship of the pressing pads when the automobile body B is polished by using the automatic aerial polishing apparatus according to still another embodiment of the present invention. The automatic air-laboratory apparatus according to this embodiment is shown in FIG.
The embodiment shown in Fig. 9 has the same structure except that the elevating mechanism (and the horizontal arm part) for the reciprocating part to which each pressurizing pad is attached is independently provided. On the other hand, each press pad 114 can be raised and lowered independently.

According to the apparatus of this embodiment, as shown in the drawing, even when the automobile body B has the sunroof opening O in the roof, at the position where the opening O exists, The pressing pad 114 (the pad at the central portion) located at this portion is made to stand by upward, and only the other pressing pads 114 (the pads on both side surfaces) can be pressed against the automobile body B for polishing. At the other positions of the hood, the trunk lid, and the roof, as shown in the drawing, all the pressing pads 11 are pressed.
4 is pressed against the car body B to perform polishing.

Further, in this embodiment, for example, a part of the connecting means such as a connecting rod and a crank for transmitting the swinging movement from the driving means (the speed reducer with the motor) to each reciprocating portion swinging on the horizontal arm portion. It is possible to change the reference position of each reciprocating part on the horizontal arm part by providing a variable length part on the horizontal arm part, so that the interval between each pressing pad can be changed, and similarly, the shaking of each pressing pad can be changed. The range of motion is also variable. The width of the substantially horizontal plane of the automobile body B is usually
Although the roof is narrower than the hood and the trunk lid roof, according to this embodiment, as shown in the drawing, the interval between the pressing pads and the swing width are set according to the width of each position of the automobile body B. It can be changed, and by controlling so that the pressure pad is always located within the width of the car body,
There is no risk of line scratches due to sharpening of the edge at the end of the work or increase in the applied pressure.

FIG. 18 (a) is a front view schematically showing the structure of a pressure head in an automatic air laboratory apparatus according to still another embodiment of the present invention, and FIG. 18 (b) is a bottom view thereof. In this embodiment, an intake flow path 249 is formed inside the press pad 214, and a plurality of dust suction ports 250 communicating with this flow path are opened on the bottom surface of the press pad. On the other hand, the outlet port 251 of the intake passage 249 formed on the side surface of the press pad is provided with an expandable communication pipe 252 such as a bellows pipe.
Through an exhaust mechanism (not shown). By arranging a dust-absorbing mechanism on the pressure pad in this way, by combining it with a mesh-shaped polishing cloth, it is possible to remove the abrasive particles that are generated at the same time as polishing, and also prevent clogging of the polishing cloth. As a result, the service life of the polishing pad is improved.

Although the present invention has been described with reference to the embodiments, the present invention is not limited to the structures of the illustrated embodiments. For example, in the above-described embodiment, the surface of the work to be polished is oriented in a substantially horizontal direction such as the hood of the automobile body, the roof and the trunk, and the polishing cloth is configured to swing horizontally. Even if the surface of the work to be polished is oriented in a substantially vertical direction or has another inclination angle, a plurality of elastically or variably supported pieces are supported as in the above embodiment. By arranging a pressing pad facing the work surface, pressing a polishing cloth against the work surface by the pressing pad, and providing a mechanism for swinging the pressing pad in a direction substantially parallel to the work surface, The device according to the invention can be configured. Also, as described above, the method of supporting the pressing pad, the presence or absence of the dust suction pipe,
It is naturally possible to adopt a configuration other than the above as long as the polishing cloth holding means and the like can take various forms and can also function similarly as the swinging mechanism and the elevating mechanism. is there.

[0100]

As described above, according to the present invention, when polishing the surface of a work, a plurality of pads for pressurizing can be moved in a direction substantially perpendicular to the surface of the work by following the shape of the surface of the work. Is arranged so as to face the work surface, the polishing pad is pressed against the work surface by the pressing pad, and the pressure pad is oscillated in a direction substantially parallel to the work surface to perform aerial polishing. Good shape followability and can be polished uniformly by automatic operation. In addition, since it has a plurality of pressing pads in this way, the entire surface can be polished simply by applying a small swing, improving the ease of designing and reliability of the device, and reducing the work area to improve the work environment. Can be one. Further, in the present invention, since polishing is performed using a polishing cloth, the amount of the polishing powder that is released during the polishing and adheres to the surface of the work is small, and it is possible to sufficiently cope with the air polishing.

Furthermore, in the automatic pneumatic research apparatus of the present invention, if the plurality of pressure pads are of a pressure type utilizing load, a constant pressure can be easily obtained.

Further, the automatic air-polishing apparatus of the present invention has a plurality of reciprocating portions arranged substantially parallel to the surface of the work, and an axis line substantially perpendicular to the surface of the work, which are arranged apart from each other. A support rod for freely or elastically changing in a direction substantially perpendicular to the work surface, while restricting the change in a direction substantially parallel to the work surface and applying a pressing force locked to the reciprocating portion. And attached to the tip of the support rod facing the work surface,
A plurality of pressing pads arranged apart from each other, a holding means for holding the strip-shaped polishing member between the work surface and the pressing pad, and the reciprocating portion in a direction substantially parallel to the work surface. With a structure having a swinging mechanism for moving and a displacement mechanism for displacing the reciprocating portion in a direction substantially perpendicular to the work surface, a predetermined swinging motion can be easily applied to a plurality of pressing pads. Further, even if the work has a complicated structure such as an automobile body, the respective parts of the work surface can be easily polished.

Further, in the automatic air-polishing apparatus of the present invention, when the pressing pad is rotatably supported by the support rod, the shape followability with respect to the surface of the work is further improved and the edge does not hit. Since the weight can be applied uniformly, it is possible to suppress the occurrence of polishing defects such as line scratches.

Further, in the automatic air-polishing apparatus of the present invention, a plurality of dust suction pipes connected to the exhaust mechanism are elastically or variably held so as to face the surface of the work and arranged in parallel with the pressing pad. Then, the grinding powder generated by polishing can be removed, and the empty grinding operation can be improved.

Further, in the automatic air-polishing apparatus of the present invention, the area of the portion of the pressing pad that contacts the polishing cloth is 6000 to 1
When it is about 0000 mm ² , the pressing force per unit area under the same load is increased, the polishing power is improved, and the conformability to the shape of the automobile body is improved.

Furthermore, the surface shape of the portion of the pressing pad that contacts the polishing cloth is short in the direction along the first direction of the work surface having a relatively large curvature, and the surface shape of the portion having a relatively small curvature orthogonal to the first direction. When it is configured to be long in the direction along the two directions, sufficient pressurizing force for obtaining a good polishing force can be obtained, and at the same time, the shape followability with respect to the work surface is further improved.

Further, in the automatic air-polishing apparatus of the present invention, it is possible to bring one polishing cloth into contact with the surface of the work piece by means of the plurality of pressing pads, so that a long polishing cloth is used. By disposing the polishing cloth supply section and the polishing cloth winding section before and after the polishing cloth holding means, it is possible to continuously replace the polishing cloth portion used in the polishing section and having deteriorated performance,
Operability is improved.

Further, the polishing cloth holding means is provided with a mechanism for fixing the polishing cloth at both ends of a plane substantially parallel to the surface of the work, and for swinging in synchronization with the swing of the pressing pad. When the polishing cloth is attached, the polishing cloth is prevented from being misaligned or dulled at the time of polishing, and local polishing defects due to these are prevented.

Further, in the automatic air-polishing apparatus of the present invention, a plurality of sets of support rods are formed for each set, and in each set, the plurality of support rods are independent of one pressure pad. And the pressure pad is formed of a member having flexibility at least in the surface direction, and the plurality of support rods can be displaced with a displacement difference from each other in a direction substantially perpendicular to the work surface. With the structure, even if the area of the pressure pad is relatively large,
The shape followability of the pad will be good, and the number of pressure pads will be reduced, which can be expected to reduce the failure rate and simplify the control. In this case, the area of the portion of each of the pressing pads contacting the polishing cloth is 6000-500000.
It is desirable that it is about mm ² .

In addition, when the area of the pressure pad is increased as described above, if the portion of the pressure pad that contacts the polishing cloth is made of an elastic material, the shape of the work surface is The followability becomes better.

Further, in the present invention, when a pressurizing portion displacement difference adjusting mechanism for adjusting the displacement difference between the plurality of support rods connected to the pressurizing pad is provided, the edge of the work edge is sharpened. There is no risk of line scratches due to increased pressure.

In the automatic pneumatic research apparatus of the present invention, the pressing pad is rotatably supported by the supporting rod, and the swinging direction of the pressing pad is substantially the same as the swinging direction of the pressing pad with respect to the supporting position by the supporting rod. At least one position separated in the orthogonal direction is provided with a press pad rising prevention mechanism that applies an elastic force or load to the press pad in a direction substantially parallel to the axis of the support rod. As a result, it is possible to prevent the pressing pad from rising due to the frictional force in the polishing step, and it is possible to carry out uniform polishing.

In the automatic pneumatic research apparatus of the present invention, the pressure pad is rotatably supported by the support rod, and a swinging prevention mechanism for restricting the rotation angle of the pressure pad in the swinging direction is provided. With the provision of, it is possible to prevent a problem such as rattling or twisting of the pressing pad when swinging, and it is possible to carry out uniform sharpening.

Further, in the automatic pneumatic research apparatus of the present invention, the reciprocating section and the displacement mechanism are provided for each pressing pad, and the displacement of the pressing pad with respect to the work surface can be controlled for each pressing pad. With this, the device can be applied to a work having a part where polishing is not necessary, such as an automobile body with a sunroof.

In the automatic pneumatic laboratory apparatus of the present invention, the reciprocating section and the displacement mechanism are provided for each of the pressing pads, and the swing width of each pressing pad and the interval between the pressing pads are variable. In this case, even if the work has a part where the width is narrow, the pressure pad can polish without sticking out of the work surface, so the edge of the work edge is sharpened and line scratches are generated due to increased pressure. There is no fear of.

Further, in the automatic air-polishing apparatus of the present invention, in the case where the pressing pad having a relatively large area is provided as described above, when a polishing cloth is arranged for each pressing pad, polishing is performed between the pads. Since there is no cloth, by disposing a dust suction device at this portion, it is possible to remove dust of grinding powder generated during polishing without being limited to the shape of the polishing cloth such as mesh. In this case, the polishing cloth holding means is provided with a mechanism such as a clamp for fixing the polishing cloth at both ends of each press pad, and is provided with a mechanism for swinging in synchronization with the swing of the press pad. Further, the polishing cloth is a long one, and a polishing cloth supply section and a polishing cloth winding section are provided in front of and behind the holding means, and further, the holding means has the above-mentioned structure. The polishing cloth fixing mechanism is displaceable in the thickness direction of the pressing pad, and the polishing cloth can be sequentially updated in a state where the contact between the polishing cloth and the pressing pad is dissociated. If so, problems such as displacement, talumi, and breakage of the polishing cloth do not occur during the polishing operation and when the polishing cloth is renewed.

In the automatic air laboratory apparatus of the present invention,
If the polishing cloth is provided with a mechanism for removing the polishing powder adhered to the polishing cloth, the polishing cloth can be effectively used without being clogged, its durability is improved, and polishing scratches due to the adhered polishing powder are provided. It is possible to suppress the occurrence of such as.

In the automatic air laboratory apparatus of the present invention,
At the same time as polishing, the pressurizing pad is formed with an intake passage connected to an exhaust mechanism, and the opening of the intake passage is provided at a portion of the pressurizing pad that contacts the polishing cloth. It is possible to remove the polishing powder and prevent clogging of the polishing cloth.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view schematically showing the configuration of an embodiment of an automatic aerial research apparatus of the present invention,

FIG. 2 is a side view of the embodiment,

FIG. 3 is a front view showing a configuration of a main part of the embodiment,

FIG. 4 is a side view showing the configuration of the main part of the embodiment,

FIG. 5 is a side view showing the configuration of the main part of another embodiment of the present invention,

FIG. 6 is a front view schematically showing the configuration of still another embodiment of the automatic air-laboratory device according to the present invention,

FIG. 7 is a side view of the embodiment,

FIG. 8 is a front view showing the main configuration of the embodiment,

FIG. 9 is a side view showing the main configuration of the embodiment,

10 (a) and 10 (b) are reference views for explaining a state at the work end portion of the pressing pad,

FIG. 11 is a front view schematically showing another main part configuration of the embodiment,

FIG. 12 is a reference diagram for explaining a rising phenomenon during polishing of the pressure pad.

FIG. 13 is a perspective view schematically showing a main part configuration of still another embodiment of the automatic air-research device according to the present invention,

FIG. 14 is a schematic diagram illustrating an operating state of the embodiment.

FIG. 15 is a reference diagram for explaining the swinging phenomenon in the swinging direction during polishing of the pressure pad.

16 (a) to 16 (d) are schematic views showing a step of renewing a polishing cloth in one embodiment of the automatic air-polishing apparatus of the present invention,

FIG. 17 is an explanatory view showing the positional relationship of pressing pads when polishing an automobile body using still another embodiment of the present invention;

FIG. 18 (a) is a front view schematically showing a configuration of a main part of still another embodiment of the automatic air laboratory device of the present invention, and FIG. 18 (b) is a bottom view of the same part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 101 ... Automatic air laboratory apparatus, 2,102 ... Post section, 3,103 ... Elevating mechanism, 4,104 ... Horizontal arm section, 5,105 ... Rail, 6,106 ... Roller, 7,107 ... Reciprocating section, 8, 108 ... Reducer with motor, 9, 109 ... Rotating shaft, 10 ... Cylinder for changing pad position for pressurization, 11 ... Piston rod, 12 ... Connection member, 13, 113, 213 ... Rod for mounting pad for pressurization, 14 , 114, 214 ... Pressing pad, 15 ... Coil spring lower end pressing collar part, 16 ... Coil spring, 17 ... Cap for preventing falling off, 18, 118 ... Arm, 19a, b ... Roll for polishing cloth bridge, 20 ... Fixing polishing cloth -Cushioning mechanism, 21 ... Abrasive cloth supply section, 22 ... Abrasive cloth winding section, 23, 123 ... Abrasive cloth supply roll, 24, 26 ... Step roll group, 25, 125 ... Abrasive cloth winding Riroll, 27, 127 ... Abrasive cloth, 28 ... Sliding part, 29 ... Rotating roller, 30 ... Concave guide groove, 31 ... Lifting motor, 32 ... Traction wire, 33 ... Pulley, 34 ... Dust absorption pipe mounting sheet metal, 35, 135 ... Dust suction pipe, 36 ... Band, 37 ... Bellows tube, 110 ... Horizontal plate part, 111 ... Rod insertion hole, 112 ... Pressurizing plate, 119 ... Clamp, 140 ... Pressurizing part displacement difference adjusting mechanism, 141 ... Position sensor Part, 142 ... regulating part, 143 ... stopper part, 144 ... rack and pinion, 145 ... presser plate, 146 ... coil spring, 147 ... shaft body, 148 ... connecting sheet metal material, 249 ... intake channel, 250 ... dust suction port, 251 ... Intake flow passage outlet, 252 ... Communication pipe, B ... Car body, O ... Sunroof opening.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Goto 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd.

Claims (23)

[Claims] 1. An automatic air-polishing device for polishing a work surface, wherein a plurality of pressing pads are arranged on the work surface and can be moved in a direction substantially perpendicular to the work surface by following the shape of the work surface. Arranged facing each other, the polishing pad is pressed against the work surface by the pressing pad, the pressing pad is swung in a direction substantially parallel to the work surface, and the polishing cloth that moves following the swing is used for polishing. An automatic air-laboratory device characterized by performing. 2. An automatic air laboratory apparatus, wherein the pressure pad is of a pressure type that utilizes a load. 3. The automatic air-laboratory apparatus according to claim 1, wherein the pressing pad is of a pressing type using an elastic member. 4. A reciprocating portion arranged substantially parallel to a work surface, and a plurality of rods each having an axis line substantially perpendicular to the work surface and arranged apart from each other, wherein A support rod that is freely or elastically movable in a substantially vertical direction, and is regulated in a direction substantially parallel to the work surface while applying a pressure applied to the reciprocating portion, and a work surface of the support rod. A plurality of pressing pads that are attached to the front end portion facing each other and are spaced apart from each other; a holding unit that holds a strip-shaped polishing member between the work surface and the pressing pad; A self-moving mechanism having a swinging mechanism for swinging in a direction substantially parallel to the work surface, and a displacement mechanism for displacing the reciprocating portion in a direction substantially perpendicular to the work surface. Polishing apparatus. 5. The automatic pneumatic research apparatus according to claim 1, wherein the pressing pad is rotatably supported by the support rod. 6. A plurality of dust suction pipes connected to an exhaust mechanism are movably or elastically held in a direction substantially perpendicular to the work surface and are arranged in parallel with the press pad. Item 6. The automatic air laboratory device according to any one of Items 1 to 5. 7. The automatic air-polishing apparatus according to claim 1, wherein the area of the portion of each pressing pad that contacts the polishing cloth is about 6000 to 10000 mm ² . 8. The surface shape of the portion of the pressing pad that contacts the polishing cloth is short in the direction along the first direction where the work surface has a relatively large curvature, and has a relatively small curvature orthogonal to the first direction. The automatic air-polishing apparatus according to any one of claims 1 to 10, which is configured to be long in a direction along the second direction. 9. The automatic air-polishing apparatus according to claim 1, wherein polishing is performed with one polishing cloth. 10. The polishing cloth holding means comprises a mechanism for fixing the polishing cloth at both ends of a plane substantially parallel to the work surface, and a mechanism for rocking in synchronization with the rocking of the pressing pad. The automatic air-laboratory device according to any one of claims 1 to 9, which is attached. 11. The polishing cloth is a long one, and a polishing cloth supply section and a polishing cloth winding section are provided in front of and behind the holding means. The automatic air laboratory device according to any one of the above. 12. The support rods form a plurality of sets for every plurality, and in each set, the plurality of support rods are independently connected to one pressure pad, and The pressing pad is formed of a flexible member at least in the plane direction, and the plurality of support rods are displaceable with a displacement difference from each other in a direction substantially perpendicular to the work surface. The automatic aerial research apparatus according to any one of claims 1 to 6, characterized in that: 13. The automatic air-polishing apparatus according to claim 12, wherein an area of a portion of each of the pressing pads contacting the polishing cloth is about 6000 to 500000 mm ² . 14. The automatic air-polishing apparatus according to claim 12, wherein a portion of the pressure pad that comes into contact with the polishing cloth is made of an elastic material. 15. A pressurizing portion displacement difference adjusting mechanism for adjusting a displacement difference between a plurality of support rods connected to the pressurizing pad is provided. The automatic air lab equipment described in. 16. The pressing pad is rotatably supported by the support rod, and is separated from a support position of the supporting rod in a direction substantially orthogonal to the swinging direction of the pressing pad. In at least one position,
The pressurizing pad rise prevention mechanism for applying an elastic force or a load to the pressurizing pad in a direction substantially parallel to the axis of the support rod is provided. The automatic air lab equipment described in. 17. The swing pad is rotatably supported by the support rod, and a swinging prevention mechanism for restricting a swing angle of the swing pad in the swinging direction is provided. The automatic aerial research apparatus according to any one of claims 5 to 16, characterized by the above-mentioned. 18. The reciprocating section and the displacement mechanism are provided for each pressing pad, and the displacement of the pressing pad relative to the work surface can be controlled for each pressing pad. Item 18. The automatic air-laboratory device according to any one of items 12 to 17. 19. The reciprocating portion and the displacement mechanism are provided for each of the pressing pads, and the swing width of each pressing pad and the interval between the pressing pads are variable. 19. The automatic air-laboratory device according to any one of 18 to 18. 20. The automatic air-polishing apparatus according to claim 12, wherein a polishing cloth is arranged for each of the pressing pads, and polishing is performed with a plurality of polishing cloths. 21. A means for holding the polishing cloth is provided for each of the pressing pads, the holding means includes a mechanism for fixing the polishing cloth at both ends of each pressing pad, and The polishing cloth is provided with a mechanism for rocking in synchronism with the rocking, the polishing cloth is long, and the polishing cloth supply section and the polishing cloth winding section are arranged before and after the holding means. Further, the polishing cloth fixing mechanism of the holding means is displaceable in the thickness direction of the pressing pad, and the contact between the polishing cloth and the pressing pad is dissociated. 21. The automatic aerial polishing apparatus according to claim 20, wherein the polishing cloth can be sequentially updated. 22. The automatic aerial polishing apparatus according to claim 1, further comprising a mechanism for removing the polishing powder adhering to the polishing cloth. 23. The pressurizing pad is provided with an intake flow passage connected to an exhaust mechanism, and an opening portion of the intake flow passage is provided at a portion of the pressurizing pad that contacts the polishing cloth. The automatic air-laboratory device according to any one of claims 1 to 22.