JPS61129053A - Electrostatic powder painting apparatus - Google Patents

Abstract

PURPOSE:To make it possible to accurately perform painting without wastefulness only by moving a moving nozzle to a predetermined position even with respect to a narrow member, by making it possible to allow a plate shaped painting member to automatically approach the fixed nozzle side frame of a roller conveyor immediately before painting. CONSTITUTION:When a conveyor driving part is operated, the rollers 21 and draw-near rollers 23 of roller conveyors 20 are rotated to feed steel plates 19 to the direction shown by the arrow so as to obliquely move the same to the side of fixed nozzles 17. When the steel plates 19 pass the draw-near rollers 23 in this side of both nozzles 17, 18, said steel plates 19 are fed along conveyor frames 23 inside two roller conveyors 20. then, a powder paint is sprayed to the surfaces of the steel plates 19 from the moving nozzles 18, which was preliminarily moved to the predetermined positions in the side of the fixed nozzles 17, and the fixed nozzles 17 by air pressure or gravity to perform electrostatic painting. By this method, the upper surface of each steel plate 19 can be simply and certainly painted without using a powder paint wastefully.

Description

Detailed Description of the Invention (a) Purpose of the Invention [Field of Industrial Application] The present invention relates to a powder electrostatic coating device, and more specifically, it relates to a powder electrostatic coating device having a structure for automatically moving a coating member during coating. Related to electrostatic coating equipment.

[Conventional technology]

As shown in Fig. 5, a conventional powder electrostatic coating device has two rows of linear roller conveyors (2) that convey steel plates (1) for coating.
1 (2), and a coating section (3) that electrostatically coats the steel plate (11) by spraying powder paint onto the steel plate +1+ being conveyed from above the upper running surface of each roller conveyor (2). This painting part (3) is equipped with a fixed nozzle (4).
) and a movable nozzle (5) that can be moved to this nozzle (4) side.
are arranged in parallel in the width direction of the roller conveyor (2).

In the above device, as shown in Fig. 6, if the width of the steel plate (11) is narrow, (a) move the moving nozzle (5) to narrow the distance between the nozzles (4) and (5); tb
l A plurality of steel plate (1) guides (not shown) are attached to the roller conveyor (2), and the steel plate (11) is connected to the fixed nozzle (
4) It was painted by moving it to the side and performing the operation described in (a) in the previous section.

In addition, when the width of the (C1 steel plate (1)) changed only slightly, the steel plate (1) was coated as it was without changing the gap between both nozzles (41 (51).

[Problem that the invention seeks to solve]

However, among these methods (method BL), the guide must be attached to the conveyor roller (2), and the steel plate (11) must be located at the center between both nozzles (41 (51). In addition, the method (a) is as troublesome as the latter operation in (b).Furthermore, in the method (al (b), the steel plate (1
) is not installed at a predetermined position, there is a drawback that powder paint is ejected outside the steel plate (11) and the paint is wasted, similar to the method (C).

This invention was made in view of the above circumstances, and its main purpose is to automatically guide the steel plate to the fixed nozzle side and move the movable nozzle to the fixed nozzle side when painting a steel plate. To make it possible to easily paint a steel plate at a predetermined position without wasting powder paint.

(B) Structure of the Invention The present invention is a powder electrostatic coating device in which the coating member is applied to a plurality of parts of the opposing frame of the roller conveyor from which one or more rollers of the roller conveyor in front of both nozzles are removed at intervals. The rollers for bringing the fixed nozzles closer to the frame of the roller conveyor on the fixed nozzle side on the conveyor conveyance surface can be rotated one or more times. Attach the roller so that it is perpendicular to a direction that makes a predetermined angle toward the frame and that the upper surface of the roller is flush with or higher than the conveying surface of the roller conveyor, and the shifting roller is attached to the drive shaft of the conveyor drive unit. It is provided with an output transmission means for rotating in synchronization with, or rotating at a higher or lower speed than this rotation.

In this invention, when the roller drive section is operated, each roller of the roller conveyor and each shifting roller are rotated, and the conveying surface of the roller conveyor is moved diagonally toward the fixed nozzle side in front of both nozzles. It acts to make it happen.

〔Example〕

The present invention will be described in detail below based on the embodiments shown in FIGS. 1 to 4. Note that this invention is not limited to this.

FIG. 1 is a perspective view of the powder electrostatic coating device (6).

(7) is the feeder, (8) is the pretreatment section, (9) is the draining furnace, 00) is the air blower section, (11) is the powder electrostatic coating section, (12) is the baking drying oven, (13) is the cooling section, (14)
(15) is the inspection department, and (15) is the sorter.

Figure 2 (a) (bl is a front view and a plan view of the part (8) in Figure 1, which shows the characteristic parts of this invention. (16)
is a powder coating basket, (17) and (18) are fixed nozzles and moving nozzles, which are installed in the same manner as before. Note that (19) is a steel plate for painting.

(20) (20) is a two-row linear roller conveyor,
There are two rollers (21) between the two rollers (21).
) The conveyor frame (22
) (22), two shifting rollers (23) are rotatably attached to each of the two locations. The outer diameters of each roller (21) and (23) are 65nφ and 35nφ, respectively.
It is mmφ. Furthermore, the roller shaft (24) of these shifting rollers (23) is connected to the roller shaft (24) of the roller conveyor.
5), and is attached so that its upper surface is flush with the conveying surface of the roller conveyor (20) or protrudes by about 5 am, as shown in FIG. By this protruding height H), the steel plate (19)
can be moved reliably. Note that the above angle can be changed by 30
゛ is preferable. Furthermore, the number of shifting rollers (23) is not limited to two, but may be one or more.

FIG. 3 is a perspective view showing the drive structure of the shifting roller (23). (26) is a drive shaft driven by a conventional conveyor drive unit (not shown). A gear box (27) that converts the driving force in the right angle direction is located below the shifting roller (23) of this shaft (26).
) are attached to the tip of the output shaft (28) from this box (27), and a pulley (
29) are attached two at a time. The belt (31) is attached to the pulley (30) attached to the end of these pulleys (29) and the two shifting rollers (23).
) are attached to each. Gearbox (2)
7), V pulley (29) (30) and ■belt (31)
) constitutes an output transmission means (32).

In addition, the drive shaft (
26) is similarly configured, so its explanation will be omitted.

In addition, the gear box (27) is provided with a worm gear etc. inside thereof, which allows the shifting roller (23
) can be rotated suitably in color synchronization with the roller (21) of the roller conveyor, or at a higher or lower speed than this rotation.

Next, the operation of the above device (6) will be explained.

First, when the conveyor drive section is activated, each roller (21) and the shifting roller (23) of the roller conveyor are rotated, and the fixed nozzle moves the steel plate (19) in the direction shown by the arrow in FIG. 2(b). (17) Move diagonally to the side and feed in one step.

When both nozzles (17) and (18) pass the shifting roller (23) in front, the oblique movement disappears and the steel plate (1
9) is conveyed along the inner conveyor frame (23) (23) of the two roller conveyors (20) (20). Therefore, as shown in Fig. 2(a), the powder coating is applied to the steel plate by air pressure or gravity from the movable nozzle (18) and the fixed nozzle (17), which have been moved to a predetermined position on the fixed nozzle (17) side. (19) Steel plate by spraying on the surface (19)
electrostatically paint.

The above-mentioned painting is performed by charging both the nozzles (17) and (18) to a negative polarity, and by charging the steel plate (19) to a positive polarity. In addition, when painting a steel plate whose overall length is short and cannot be coated with this device (6), it is possible to coat a steel plate with a longer length than this steel plate and cut it after painting to make it shorter. can also be handled.

As described above, by always keeping the conveyance position of the steel plate (19) constant before painting, powder coating can be prevented from being wasted by simply moving the movable nozzle (18) to the fixed nozzle (17). , the upper surface of the steel plate (19) can be painted easily and reliably.

(C) Effects of the Invention This invention is configured so that the plate-shaped member to be coated is automatically brought to the frame on the fixed nozzle side of the roller conveyor before coating, so even if the width of the member to be coated becomes narrow, By simply moving the movable nozzle to a predetermined position on the fixed nozzle side, the coating member can be electrostatically coated simply and accurately without wasting powder coating.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the powder electrostatic coating apparatus according to the present invention, FIG. A perspective view showing the drive structure of this shifting roller, Fig. 4 is an explanatory diagram of the installation height of this shifting roller, Fig. 5 ta) + b) is a diagram corresponding to Fig. 2 of the conventional 46tJ, and Fig. 6 is a diagram of the width. No. 5 showing when painting a narrow steel plate
Figure (al equivalent diagram) (6) - Powder electrostatic coating device, (17) - Fixed nozzle,
(1B) - m - moving nozzle, (19) - steel plate for painting,
(20) - Roller conveyor '7, (21) - Roller of roller conveyor, (22) - m - Conveyor frame, (23
) - Roller for shifting, (24) (25) - Roller shaft,
(32) - Output transmission means. 't7:-,7::j. Figure 3 (a) No. 614

Claims (1)

[Claims] 1. A roller conveyor and a conveyor drive unit that drives each roller of this conveyor, fixed nozzles arranged in parallel in the width direction above the upper running surface of the roller conveyor, and the fixed nozzle side In a powder electrostatic coating device that sprays powder paint onto the top surface of a plate-shaped coating member conveyed by a roller conveyor to electrostatically coat the member using a movable nozzle that can be moved to the front side of both nozzles. At a plurality of locations on the opposing frame of the roller conveyor from which one or more of the rollers of the roller conveyor have been removed one after another, one or more rollers for moving the coating member to the frame of the roller conveyor on the fixed nozzle side on the conveyance surface of the roller conveyor are installed. The rotation axis of the roller is perpendicular to the conveying direction of the roller conveyor, and a direction that makes a predetermined angle toward the frame on the fixed nozzle side of the roller conveyor on the conveying surface, and the upper surface of the roller is the conveying surface of the roller conveyor. The roller is mounted flush with or higher than the conveyor roller, and an output transmission means is provided on the drive shaft of the conveyor drive unit to rotate the shifting roller in synchronization with the roller of the conveyor roller or at a higher or lower speed than the roller of the conveyor roller. Powder electrostatic coating equipment.