JP3054290B2 - Reciprocating coating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating coating apparatus used for continuous coating of a vehicle body conveyed at a predetermined speed from a front surface to an upper surface and a rear surface thereof by a conveyor.

[0002]

2. Description of the Related Art A coating apparatus of this kind raises and lowers an elevating frame disposed above and perpendicular to a conveying path of an object to be coated in accordance with a change in the shape of the object to be coated. 2-4 arranged side by side at required intervals along the direction
At the same time as keeping a certain coating distance between each coating machine of the stand and the painted surface of the workpiece, each coating machine should be orthogonal to the transport path of the workpiece to prevent the coating film from incurring or thick coating. The reciprocating motion is performed integrally along the direction of the movement.

A means for reciprocating the coating machine includes a chain in which a plurality of coating machines are juxtaposed at predetermined intervals on a slider slidably provided along the longitudinal direction of the elevating frame, and the slider is mounted on the elevating frame. A reciprocating mechanism using a reciprocating mechanism such as a sprocket mechanism, a screw feed mechanism, or a crank mechanism (FIG. 1 in JP-A-60-232268 and FIG. 3 in JP-A-63-88072) is common. However, recently, without a slider, the coating machine is suspended by hanging both ends of the lifting frame with a link that swings pendulum to the left and right, and swinging the entire lifting frame in a direction orthogonal to the conveyance path of the workpiece. A new reciprocating method (Japanese Patent Application Laid-Open No. 63-88072) is also used.

[0004]

However, in the former slider system, the slider which reciprocates with a plurality of coating machines arranged in parallel at a predetermined interval is very large and heavy.
The air flow of the conditioned air supplied from the plenum chamber provided above the coating chamber is disturbed by the slider, causing the paint mist to soar or the impact generated when the movement direction of the slider is reversed. There is a possibility that dust or dirt adhering to the surface of the slider or the lifting frame may fall down on the painted surface of the object to be coated, resulting in a defective coating film, or rattling or damage to the support mechanism of the lifting frame.

In the latter link system, each of the coating machines arranged side by side at predetermined intervals on an elevating frame reciprocates so as to draw an arc-shaped trajectory. Since the coating distance between the paints varies continuously, the use of a paint having a subtle luster such as a metallic paint may cause a difference in tint at a portion where the paint spray patterns of the respective coating machines overlap.

Accordingly, the present invention relates to a slider type reciprocating coating apparatus which does not cause a color difference even when a metallic paint is applied. A slider reciprocating along a lifting frame feeds air from a plenum chamber into a coating chamber. Technology to prevent the air flow of the conditioned air from being disturbed, and to prevent dust and dirt from falling due to the impact of the slider being inverted, and to prevent rattling or damage to the support mechanism of the lifting frame. Is a subject.

[0007]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a slider in which a coating machine is mounted on an elevating frame which elevates and lowers according to a shape change of an object to be coated conveyed at a predetermined speed. In a reciprocating coating device equipped with a reciprocating mechanism for reciprocating the elevating frame in the longitudinal direction, a plurality of sliders each having one coating machine attached thereto are arranged in parallel in the longitudinal direction of the elevating frame. A plurality of reciprocating mechanisms for individually reciprocating the respective sliders are mounted on the elevating frame, and a control device for driving and controlling the respective reciprocating mechanisms so that the respective sliders reciprocate at a constant speed while maintaining a required interval is provided. It is characterized by having.

[0008]

According to the present invention, a plurality of sliders are arranged side by side on the elevating frame, and one coating machine is attached to each of the sliders. The weight of the entire slider, including the coating machine, can be significantly reduced as compared with the conventional one. Therefore, there is no fear that the airflow of the conditioned air introduced into the coating chamber is disturbed and the paint mist soars, and that the impact when the slider is inverted is extremely small, so that dust and dirt fall, and the lifting frame is supported. There is no worry about damaging the mechanism. In addition, since each slider to which a coating machine is attached is controlled so as to reciprocate at a constant speed while maintaining a required interval, there is no danger of coating unevenness. It can be variably adjusted according to the coating width of the object or the object to be coated.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an example of a reciprocating coating apparatus according to the present invention, and FIG. 2 is a plan view thereof.

In the drawing, reference numeral 1 denotes an elevating frame disposed above a workpiece 2 conveyed by a conveyor at a predetermined speed along a direction orthogonal to the conveying path, and both ends of the frame are objects to be coated. It is supported by elevating racks 4 and 4 that move up and down along columns 3 and 3 provided on both sides of the conveyance path 2 and can be moved up and down according to a change in the shape of the workpiece 2. Reference numerals 5 and 6 denote sliders that run on one slide rail 7 disposed along the longitudinal direction of the lifting frame 1, and each of them is provided with one coating machine 8.

Also, 9 and 10 are sliders 5 and 6 respectively.
Are reciprocated individually along the sliding rails 7, each of which comprises a chain sprocket mechanism in which a chain 14 is hung in parallel between a driving sprocket 12 and a driven sprocket 13 which are driven to rotate by a motor 11. Have been. The reciprocating mechanisms 9 and 10
Are arranged along the front side and the rear side of the slide rail 7 respectively, and a driving sprocket 12 and a driven sprocket 13 are disposed on both left and right ends of the lifting frame 1. 15 is the motor 1 of each reciprocating mechanism 9 and 10
1 are simultaneously activated and rotated at a constant speed, so that the sliders 5 and 6 are reciprocated at a constant speed while maintaining a predetermined interval, or one of the motors 11 is rotated in the forward and reverse directions to cause the sliders 5 and 6 to rotate. Coating machines 8 and 8 attached to
It is a control device that outputs a control signal for changing and adjusting the interval between the two.

During the coating operation, the sliders 5 and 6 each having one coating machine 8 reciprocate on the slide rail 7 of the lifting frame 1 at a predetermined interval, and move to the object 2 to be coated. A uniform coating film is formed on the painted surface. Further, the sliders 5 and 6 to which each one of the coating machines 8 is attached can be made small and light, having a width similar to that of the coating machine 8, so that the air conditioning introduced from the plenum chamber provided on the ceiling of the coating room. There is little risk of disturbing the air flow and causing the paint mist to soar, and the impact generated when the reciprocation is reversed is extremely small, so that dust and dirt attached to the elevating frame 1 are applied to the painted surface of the workpiece 2. There is no risk of dropping or rattling or damage to the support mechanism of the lifting frame 1.

Further, since each of the sliders 5 and 6 is significantly smaller and lighter than the conventional one, and since only one coating machine can be attached to each slider, the reciprocating mechanisms 9 and 10 mounted on the lifting frame 1 are mounted. In this case, the capacity of the motor 11 is small, the size is simple, and the lifting frame 1 as a whole is also reduced in weight. In addition, each reciprocating mechanism 9 and 10
Are provided along one slide rail 7 on both front and rear sides thereof, and bulky driving sprockets 12 and driven sprockets 13 are disposed on both right and left ends of the lifting frame 1. If only the chain 14 or the belt which is hung in parallel between the driving sprocket 12 and the driven sprocket 13 is arranged from both end sides to the central portion, the entire lifting frame 1 is formed into a slim shape having no thickness as shown in FIG. So you can
The possibility that the airflow of the conditioned air is disturbed above the object to be coated 2 and that the paint mist soars is extremely reduced. In the embodiment, a chain sprocket mechanism is used as a reciprocating mechanism for reciprocating each slider.
The invention is not limited to this, and a screw feed mechanism or the like may be used.

[0014]

As described above, according to the present invention, the airflow of the conditioned air introduced into the coating chamber from above is caused by the reciprocating movement of the slider on which the coating machine is mounted along the lifting frame. This eliminates the danger that the paint mist will rise and that the slider will be turned over, so that there is no danger of dust and dirt dropping, and that there is no risk of rattling or damage to the support mechanism of the lifting frame. It has a very good effect.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a reciprocating coating apparatus according to the present invention.

FIG. 2 is a plan view of a reciprocating coating apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Elevating frame 2 ... Workpiece 5 ... Slider 6 ... Slider 8 ... Coating machine 9 ... Reciprocating mechanism 10 ... Reciprocating mechanism 15 ... Control device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B05B 13/04

Claims (2)

(57) [Claims] 1. A reciprocating mechanism for reciprocating a slider on which a coating machine is mounted along a longitudinal direction of an elevating frame is mounted on an elevating frame which elevates and lowers according to a shape change of an object to be coated conveyed at a predetermined speed. In the reciprocating coating apparatus described above, a plurality of sliders (5, 6) each having one coating machine (8) attached thereto are arranged side by side in the longitudinal direction of the lifting frame (1), and the respective sliders (5, 6) are arranged in parallel. 5,
6) multiple reciprocating mechanisms (9,
A control device (15) mounted on the lifting frame (1) and drivingly controlling each of the reciprocating mechanisms (9, 10) so as to reciprocate the sliders (5, 6) at a constant speed while maintaining a required interval. ) Is provided. 2. The reciprocating mechanism (9, 10) includes a chain (1) between a driving sprocket (12) and a driven sprocket (13) disposed on both left and right sides of a lifting frame (1).
4) The device according to claim 1, wherein the belt is constituted by a mechanism which is hung in parallel, and is provided on one slide rail (7) for running each of the sliders (5, 6) on both front and rear sides thereof. Reciprocating coating equipment.