JPH05123616A - Coating device for h-shape steel - Google Patents

Abstract

PURPOSE:To automatically and evenly apply a rust preventive paint, etc., on H-shape steels of various sizes by providing a nozzle driving control section which selects the nozzles to be used for spraying of the coating material and automatically regulates the height positions and mounting angles of the nozzles in correspondence to the sizes of the H-shape steels to be sent to a booth. CONSTITUTION:Transporting means 2 horizontally holds the flange parts of the H-shape steels 1 by means of wires 12 and horizontally feeds the H-shape steels in a longitudinal direction. The plural coating material spraying nozzles 4 of a stationary type and a portable type are provided vertically in plural arrays on both sides of the H-shape steel transporting path within the booth 3 and near the top and bottom thereof. Means 5 for movably supporting the nozzles, such as cylinders, which support the plural nozzles of the movable type vertically movably and adjustably in the mounting angles. The nozzles 4 to be used by spraying the coating material are automatically selected and the height positions and mounting angles or of the nozzles 4 to be used by actuating the means 5 are automatically regulated by the nozzle driving control section 6 in accordance with the sizes of the steels 1 to be transported to the booth 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an H-shaped steel coating device for spraying a coating such as a rust preventive coating onto the entire surface of an H-shaped steel.

[0002]

2. Description of the Related Art A general spray coating method using a spray gun is a general coating method of rust preventive paint on the entire surface of H-section steel used for construction and the like. This is a method in which an operator holds a spray gun and sprays rust preventive paint sprayed from the tip of the spray gun onto H-shaped steel from various angles to paint.

[0003]

However, it is necessary to change the direction of the spray gun many times to apply the rust preventive paint on the entire surface of the H-shaped steel by the manual operation of the operator using the spray gun, and the work efficiency is improved. Poor, and there may be spots on the H-section steel where paint is left unpainted. In addition, paints such as rust preventive paints contain harmful substances such as thinner that harm the human body, and they are sprayed into the work space for painting, which may worsen the work environment and are avoided by workers. There is. For this reason, the appearance of a coating device that automatically applies rust preventive paint to the entire surface of H-section steel is demanded. However, H-section steel is available in various sizes, standardized, and of all sizes. At present, there is no coating device that can automatically coat the entire surface of the H-section steel in a short time without any spots.

The present invention responds to the above-mentioned demands, and automatically and reliably applies a paint such as a rust preventive paint to the entire surface of the H-section steel in a short time, and easily and quickly follows the size change of the H-section steel. It is an object of the present invention to provide a coating device exclusively for H-shaped steel to be obtained.

[0005]

In order to achieve the above object, the present invention provides a conveying means for horizontally feeding the H-shaped steel in the longitudinal direction of the H-shaped steel with its flange portion horizontal, and an H-shaped steel to be horizontally fed. A booth for spray painting that passes through the interior, a plurality of paint spray nozzles arranged in a plurality of rows in the vertical direction on both sides of the H-shaped steel transport path in the booth and in the vicinity of the top and bottom of the passage, and a selected plurality of nozzles. Nozzle movable support means that supports the nozzle so that it can be moved up and down and the mounting angle can be adjusted, and in accordance with the size of the H-shaped steel sent to the booth, selection of the nozzle to be used by spraying paint and operation of the nozzle movable support means. And a nozzle drive control unit for automatically adjusting the height position and mounting angle of the nozzle to be used.

[0006]

While the H-section steel is fed horizontally into the booth, paint sprayed from a plurality of nozzles arranged in a plurality of rows on both sides of the H-section steel transportation path in the booth is sprayed onto the H-section steel. Paint is automatically applied to H-section steel. If the height and mounting angle of the corresponding nozzles in the nozzle movable support means are properly adjusted according to the size of the H-section steel, the paint is sprayed from the proper direction onto the entire surface of the H-section steel, and the entire H-section steel is collectively covered. It will be applied in a short time without unevenness.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the drawings. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a front view.
The H-shaped steel coating apparatus of the embodiment of the present invention shown in these is
A total of eight columns (7) ... are installed in four rows in the vertical direction along the opposing inner wall surfaces of the spray coating booth (3), and a plurality of paint spray nozzles are provided on each column (7). (4) ... is attached. While the H-section steel (1) is horizontally fed into the booth (3), the coating material is sprayed toward the H-section steel (1) from each nozzle (4). The H-section steel (1) has a web portion (1
The flange portions (1b) at both ends of (a) are vertically held by the conveying means (2) and horizontally fed as they are in the length direction of the H-section steel. There are nozzles (4) fixed to the column (7), and those that are movably attached to the column (7) and whose height and attachment angle are freely adjusted. The former fixed nozzle is shown by (4a) (4c) in FIG. 4, and the latter movable nozzle is shown by (4b) (4d) (4e) in FIG. Each of the movable nozzles (4) ... Is supported by nozzle movable supporting means (5) attached to the column (7) or booth (3) so that the height and the mounting angle can be adjusted. Such height and mounting angle adjustment can be done at the booth (3)
When there is a change in the size of the H-section steel (1) sent to, the change is performed according to the changed size. Further, the above adjustment is automatically performed by the nozzle drive control unit (6) having the H-section steel size setting function. The size of the H-section steel (1) is such that the height of the web is from 250 mm to 1300 mm.
The intervals are 0 mm, and the width of the upper and lower flanges is 125 mm ~
Up to 400 mm, the number of nozzles (4) to be used, the optimum height, and the mounting angle are registered in advance in the nozzle drive control unit (6) according to these sizes, and this can be selected by the selection switch. It is configured.

The transport means (2) for the H-section steel (1) is, for example, of a crane type, and is provided from a carriage (11) moving along a rail (10) horizontally fixed above the booth (3) to a carriage 2 (2).
Hanging a wire of books (12). Two wires (1
The lower part of 2) is wrapped around both ends of the H-shaped steel (1) and suspended to horizontally support the H-shaped steel (1). The conveying means (2) uses the H-shaped steel (1) and a flange portion (1
Horizontally feed b) into the booth (3) while maintaining a constant reference height. Therefore, even if the H-shaped steels (1) having different sizes are carried into the booth (3), the height of the flange portion (1b) above the same is constant, and the height of the flange section (1b) is set as a reference in the booth (3). Fixed nozzles (4) and movable nozzles (4) are arranged as described later.

The booth (3) has an opening (13) through which the H-shaped steel (1) suspended by a wire (12) goes in and out on the front and rear surfaces.
And has a slit (14) through which the wire (12) passes. The bottom plate (15) of the booth (3) is a porous ventilation plate, and the exhaust duct (16) is connected thereunder. Exhaust duct (1
The exhaust fan (17) is installed at the tip of 6), and when the exhaust fan (17) is rotated, the air in the booth (3) passes through the bottom plate (15) and the exhaust duct (16) to clean the outside air. It is sent to an apparatus (not shown) and cleaned. Such exhaust means keeps the working environment inside and outside the booth (3) clean.

The plurality of nozzles (4) for spraying the paint onto the H-shaped steel (1) in the booth (3) have the same structure. For example, as shown in FIG. 7, a paint nozzle is provided at the tip of the hot air nozzle (20). It is a double nozzle in which (21) is concentrically covered and fixed.
When hot air (22) is ejected from the hot air nozzle (20) and liquid paint (23) is supplied to the paint nozzle (21), the paint (23)
Is sucked by the negative pressure at the tip of the hot air nozzle (20) and the hot air (2
Along with 2), it becomes a mist and is ejected. Each nozzle (4) ...
Is directed to the H-section steel (1), and the spray of hot air (22) and paint (23) ejected from the nozzle (4) is the H-section steel (1).
The paint (23) is sprayed onto the H-shaped steel (1),
This is immediately dried with hot air (22), and painting and drying are performed simultaneously.

FIG. 6 shows a concrete example of the nozzle movable support means (5), which is an air cylinder (24) for moving the movable nozzle (4b) up and down and a movable nozzle (4b) in the vertical direction. It is composed of a rotary cylinder (25) that swings within a predetermined angle range. The operations of the air cylinder (24) and the rotary cylinder (25) are automatically controlled by the nozzle drive control section (6). The nozzle drive control unit (6) is built in a control panel (not shown) arranged outside the booth (3) and is sent to the booth (3) by a manual operation switch or the like of the control panel (1). When the size of the air cylinder (2) is set, the nozzle drive controller (6)
4) and the rotary cylinder (25) are operated to automatically set the height and mounting angle of the movable nozzle (4b) to the optimum size for the H-shaped steel (1).

A specific arrangement example of the plurality of nozzles (4) ...
This will be described with reference to FIGS. 4 and 5. Four columns (7) are arranged to face each other on both sides in the booth (3), and as shown in FIG. 5, from the front row on the side where the H-section steel (1) is loaded to the first column. ~ 4th support | pillar (7a)-(7d) is called, the fixed type nozzle (4 shown in FIG. 4 is substantially in the middle of the upper end of the 1st support | pillar (7a) of the front row, and the 3rd 3rd support | pillar (7c).
a) (4c) is fixed. Movable nozzles (4b) (4d) (4e) are provided at one upper part and two lower parts of the second column (7b) second from the front row and the fourth column (7d) of the last row.
Is installed.

As shown in FIG. 4, a fixed nozzle is provided in two upper and lower stages in the vertical diagonal direction of the upper flange portion (1b) at the standard height of the H-shaped steel (1) carried into the booth (3). (4a) and (4c) are installed, and the spray from here is sprayed onto both the upper surface of the upper flange portion (1b) and both surfaces of the web portion (1a). Further, the movable nozzles (4b) arranged in the upper and lower three stages ... One of the upper stages (4b) is arranged between the fixed nozzles (4a) and (4c), and the other two (4d).
And (4e) are arranged below the lower fixed nozzle (4c). The vertical stroke and the rotation angle of the movable nozzles (4b) of three upper and lower stages are individually set based on the minimum size and the maximum size of the H-shaped steel (1). That is, H
The size of the shape steel (1) is determined in stages, and the height of the flange portion (4b) at the upper part of the shape steel is made constant, and the H shape steel (1)
When is carried into the booth (3), the optimal spray direction from each nozzle (4) is determined by the size of the H-shaped steel (1), and each nozzle (4) is sprayed from this spray direction.
The height and mounting angle are set.

The shape of the H-section steel (1) is basically the same, but as shown in the figure, the H-section steel (1) in which the blades (1c) such as mounting plates are integrally fixed to both surfaces of the web portion (1a). In the above, it is difficult to spray-coat both sides of the blade (1c) only with the nozzle arrangement shown in FIG. Then, feather board (1c)
For H-section steel (1) having, as shown in FIG.
The nozzles (4) attached to the first and second columns (7a) and (7b) are slightly inclined in the traveling direction of the H-shaped steel (1),
The nozzles (4) attached to the fourth support columns (7c) (7d) are arranged with a slight inclination in the direction opposite to the direction of travel of the H-shaped steel (1). The reason will become clear in the next H-section steel painting operation.

Next, the coating operation of the H-section steel (1) will be described. First, when the size of the H-section steel (1) is set, the number, positions, and angles of the nozzles (4) effectively used for the entire surface coating of the H-section steel (1) are determined by the nozzle drive control unit (6). Automatically set. In other words, if the H-section steel (1) has a minimum size or a size close to it, all nozzles (4)
It is not necessary to use ..., For example, in the H-section steel (1 ′) shown by the alternate long and short dash line in FIG. 4, the fixed nozzle (4
The entire surface of the H-shaped steel (1) can be spray-painted only by the a) and the movable nozzle (4d) of the second stage, and by doing so, waste of the sprayed paint can be eliminated. Further, in the H-shaped steel (1 ″) close to the maximum size shown by the chain double-dashed line in FIG. 4, there are cases where the entire surface cannot be coated unless all the nozzles (4) are used. In this way, the nozzles (4) to be used are selected and set according to the size of the H-shaped steel (1), and the coating material is ejected only from the selected nozzles (4). This spraying of paint is performed only when the H-section steel (1) is present in the booth (3) to save the waste of paint. Inside the booth (3), the H-section steel (1) is spray-coated from the entire surface of the tip, and when the blade (1c) is slightly past the first strut (7a), it is tilted in the H-section steel traveling direction of the first strut (7a). The rear surface of the blade (1c) is painted by spraying from the nozzle (4).
Spraying from the nozzle (4) where the front surface of the blade (1c) is tilted in the direction opposite to the H-shaped steel traveling direction of the third pillar (7c), where the blade (1c) has passed a little over the second pillar (7b). Painted on. Therefore, while the H-section steel (1) passes through the booth (3), the entire surface of the H-section steel (1) including both surfaces of the wing plate (1c) is automatically coated without unevenness. When the H-section steel (1) is suspended by the wire (12), only the portion of the H-section steel (1) where the wire (12) is present is not painted. Such unpainted areas are very small, and there is no problem in working even if they are manually painted later.

When the size of the H-section steel (1) sent to the booth (3) is changed, the selection, position, and angle of the nozzles (4) to be used are automatically set according to this size change, and the painting work is completed. Continued.

The present invention is not limited to the above embodiment, but it is also possible to use a roller conveyor or the like as the conveying means for supporting the H-section steel and conveying it to the booth. Further, it is possible to make a change to increase the number of nozzles or the number of nozzles arranged in the booth in correspondence with a special H-section steel obtained by subjecting the H-section steel to special processing. Further, all the nozzles may be installed so as to be vertically rotatable, or some of the nozzles may be rotated only at fixed positions or may be vertically moved.
In addition, the boot (3) is equipped with an explosion-proof device.

[0018]

According to the present invention, the heights and mounting angles of a plurality of nozzles in the booth are set in accordance with the size of the H-section steel, and the paint is applied toward the H-section steel horizontally fed from these nozzles into the booth. When sprayed, the paint is continuously and automatically applied to the entire surface of the H-section steel, so that it becomes possible to automatically coat the entire surface of the H-section steel, greatly improve the workability of coating, and make the coating finish uniform. Also, because it is automatically painted in the booth,
It will be easy to cleanly improve the work environment for painting by attaching a simple exhaust means to the booth. Further, by appropriately adjusting the height and mounting angle of the nozzle according to the size of the H-section steel, there is an effect that it can be used for painting various types of H-section steels of different sizes and is convenient and versatile.

[Brief description of drawings]

FIG. 1 is a side view including a partial cross section showing an embodiment of the present invention.

FIG. 2 is a plan view of the apparatus shown in FIG.

FIG. 3 is a front view of the apparatus shown in FIG.

FIG. 4 is a nozzle layout view from the front in the booth of the apparatus shown in FIG.

FIG. 5 is a nozzle layout view from a plane in the booth of the apparatus shown in FIG.

FIG. 6 is a side view showing an example of a nozzle and its movable supporting means in the apparatus shown in FIG.

7 is a partially enlarged sectional view of the nozzle of FIG.

[Explanation of symbols]

 1 H-shaped steel 1b Flange part 2 Conveying means 3 Booth 4 Nozzle 5 Nozzle movable supporting means 6 Nozzle drive control section

Claims (1)

[Claims] 1. An H-shaped steel with its flange portion horizontal
Conveying means for horizontally feeding the shape steel in the longitudinal direction, a booth for spray coating through which the horizontally fed H-shape steel passes, and a plurality of vertical rows on both sides of the H-shape steel conveying path in the booth and in the vicinity of the upper and lower sides. Corresponding to the size of the H-section steel sent to the booth, the plurality of paint spraying nozzles arranged in the And a nozzle drive control unit that automatically adjusts the height position and the mounting angle of the nozzle to be used by operating the nozzle movable support means, and selecting the nozzle to be used by spraying the paint. Shaped steel coating equipment.