JPS585713B2 - How to paint shaped steel - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for painting section steel.

Conventionally, as shown in FIGS. 1 and 2, a method for painting shaped steel is to tilt the painting guns 1-1 and 1-2 at a predetermined angle θ with respect to a horizontal plane, and then apply the painting guns 1-1 and 1- 2 means shaped steel 2
The painting guns 1-3 are arranged facing each other at a distance l1 apart from each other in the width direction of the steel section 2, and the painting guns 1-3 are arranged perpendicularly to the web surface of the section steel 2. and 1-3
In order to prevent the coating patterns from interfering with each other, the painting guns 1-1 and 1-1 are spaced apart in the length direction of the shaped steel 2 by distances l2 and l3 according to the width of the painting patterns, as shown in FIG.
-2 and 1-3 are reciprocated in the width direction of the section steel,
Painting is carried out by controlling the spraying of paint from painting guns 1-1, 1-2, and 1-3 on and off at appropriate positions and at appropriate timings in the length and width directions of the shaped steel. Ta.

Note that 3 is a table roller that moves the section steel 2.

When using the conventional painting method as described above, the painting degan 1
The interval 11 between -1 and 1-2 is 11=2.(h-F/4)cotθ when the section steel 2 is, for example, an H section steel.

Here, h is the distance from the horizontal plane connecting the tips of the coating parts 1-1 and 1-2 to the web of the H-section steel, and F is the flange width of the H-section steel.

Therefore, unless the interval l1 between the painting guns is changed each time a section steel having a different shape and size is painted, there is a drawback that unpainted areas and overspray will occur.

Furthermore, depending on the shape and dimensions of the shaped steel, the distance l1 may be a very large value, which has the disadvantage that the gun support member for arranging the painting guns 1-1 and 1-2 must be made very long. Moreover, for this reason, there is a drawback that the gun supporting member must be strong and large in consideration of problems regarding stability and strength of the gun supporting member during reciprocating movement of the painting gun.

In addition, as shown in FIG. 2, the painting gun 1-1 is moved a distance l2, l3 in the length direction of the shaped steel to avoid interference with the painting pattern.
and 1-2, and the intervals between 1-2 and 1-3 are shifted by 1, so that it is possible to control the on/off of paint supply to each painting gun at both ends of the length of the shaped steel. , the painting guns 1-1, 1-2, and 1-3 must be controlled at individual positions and timings, and a control mechanism for this is required, resulting in a disadvantage that the painting control mechanism becomes complicated.

The object of the present invention is to provide a coating method that eliminates the above-mentioned drawbacks.

According to the present invention, this purpose is achieved by forming first and second first and second cylinders which are inclined at a predetermined angle with respect to a horizontal plane and arranged so that the paint spraying directions are opposite to each other when viewed in the width direction of the section steel. At least one pair of painting guns consisting of painting guns and at least one third painting gun disposed perpendicularly to the horizontal plane are reciprocated in the width direction of the section steel, and the first and third painting guns are Paint mainly the vertical surfaces of the shaped steel using the painting gun No. 2,
Painting the shaped steel by controlling on/off the spraying of paint from the first, second and third painting guns so that the third painting gun mainly paints the horizontal surface of the shaped steel. This is achieved by

The method of the present invention will be explained below using examples.

3 to 6 are explanatory diagrams of an embodiment to which the method of the present invention is applied.

As shown in Fig. 3, the painting guns 1-1 and 1-2 have an angle θ with the horizontal plane connecting their tips.
They are arranged so that the spraying directions of the paint are opposite to each other when viewed in the width direction of the shaped steel 2.

Further, the painting gun 1-3 is arranged perpendicularly to the web surface of the section steel.

The painting guns 1-1, 1-2 and 1-3 are supported adjacent to each other on one gun support member 4, and the painting guns 1-1, 1-2 and 1-3 are mounted on a section steel. 2 in the width direction as shown in FIG.

This may be done by a conventional method.

For example, when a gun carrier is driven by a drive pin fixed to a gun drive chain and the gun drive chain moves in a fixed direction between two sprocket wheels, the gun carrier is configured to reciprocate between both sprocket wheels. , one end of the gun support member 4 is fixed to the center of the gun carrier, and the painting guns 1-1, 1-2, and 1-3 are reciprocated as one body in the width direction of the shaped steel 2 in synchronization with the reciprocating movement of the gun carrier. All you have to do is make it move.

The reciprocating path of the painting guns 1-1, 1-2, and 1-3 is assumed to be from point C to point F in FIG.

First, at point C, the extension line of the axis of the painting gun 1-1 intersects at the center of the width of the flange of a section steel, for example, H section steel 2, and at point F, the extension line of the axis of the painting gun 1-2 crosses H It is assumed that they intersect at the center of the width of the other flanges of the section steel 2.

Now, on the outward journey in which the painting guns 1-1, 1-2, and 1-3 are moved together from point C to point F, paint is not applied to painting gun 1-1 while moving from point C to point D. During movement from point E to point F, paint is supplied to painting gun 1-2 and paint is jetted from painting guns 1-2. Controls paint supply on/off.

Therefore, point D is the position where the extended line of the axis of painting gun 1-1 intersects with flange end B, and point E is the position where the extended line of the axis of painting gun 1-2 intersects with flange end A. .

Further, during movement from point G to point H, paint is supplied to the painting gun 1-3 and the supply of paint is controlled on and off so that the paint is injected from the painting gun 1-3.

Here, point G and point H are positions where the painting gun 1-3 faces the flange ends A and B.

Also on the return trip, the spraying of paint is controlled in the same way as above.

Therefore, the inner and outer surfaces of the flange portion of the H-beam 2 are mainly painted with the spray paint from the painting guns 1-1 and 1-2, and the web surface of the H-beam 2 is mainly painted with the spray paint from the paint gun 1-3. H-shaped steel 2
As the H-beam 2 progresses in the longitudinal direction, the upper half of the H-beam 2 is painted.

Further, the lower half of the H-section steel 2 can also be painted in the same manner.

Regarding the setting of the coating start point or coating stop point, the inclination angle θ of the coating guns 1-1, 1-2 with respect to the horizontal plane and the horizontal plane of the tips of the coating guns 1-1, 1-2 and the H-shaped steel 2 are determined. Points C to F may be determined based on the distance h between the webs and the flange width of the H-beam 2.

Also, point G and point H are flange ends A and B of H-beam 2.
Determined by the position of

Therefore, C was determined by considering the tilt angle θ of the painting gun, etc.
Setting of points to H points and painting gun 1- at each point
By accurately controlling the on/off of paint supply to 1, 1-2, and 1-3, it is possible to obtain a uniform coating film thickness on the flange surface and web surface of the H-section steel 2, and Overspray can be reduced and unpainted areas can be eliminated.

In addition, since the painting guns 1-1 and 1-2 are installed in opposite directions, there is no interference in the painting pattern, and the painting guns 1-1 and 1-2 are installed in opposite directions.
The interval l1 between and 1-2 may be zero, or may be arranged at an arbitrary interval.

Furthermore, since the painting guns 1-1, 1-2, and 1-3 do not interfere with their respective painting patterns, they may be arranged adjacent to each other in the length direction of the H-beam 2, and l2 and l3 can be set to zero. They can be brought close to each other and may also be arranged at arbitrary intervals.

Now, if l2 = l3 There is no inconvenience at all if you control it.

Next, an example of on/off control of the painting guns 1-1, 1-2, and 1-3 will be explained.

This example is an example using a preset counter.

The device of this example includes a clock pulse oscillator that oscillates clock pulses synchronized with the moving speed of the gun support member 4, a counter that counts the output of the clock pulse oscillator, and a clock pulse oscillator that oscillates clock pulses synchronized with the moving speed of the gun support member 4, a counter that counts the output of the clock pulse oscillator, and a It consists of a setting section in which preset values are stored.

As shown in FIG. 7, it is assumed that the gun support member 4 moves back and forth using points J and K as turning points.

FIG. 7a shows the turning points J, K and the upper end passage line of the gun carrier indicated by straight line a added to FIG. 5.

The setting section has preset sections corresponding to the painting guns 1-1, 1-2, and 1-3, respectively, and the presetting section for the painting gun 1-1 uses the clock pulse count value from the count start position M. Points C and D are respectively set as shown in FIG. 7c, and points E and F are similarly set as shown in FIG. In the preset section for -3, points G and H are set as shown in FIG. 7e, and when the count value of the counter reaches each set point, a signal is output to the corresponding painting gun.

Figure 7b shows the clock pulses. Now, the outward path of moving the gun support member 4 from point J to point K will be explained.

The gun carrier moves, and at the count start position M, the count start sensor detects the striker of the gun carrier, a count start signal is generated, and the counter starts counting clock pulses from the clock pulse oscillator.

The counter progresses in synchronization with the movement of the painting guns 1-1, 1-2, and 1-3, and when it reaches the count value corresponding to the setting value of point C in the setting section, the painting gun 1-1
The on/off valve that supplies paint is turned on and held there.

Further, when the gun carrier advances and the count value of the counter reaches point G of the setting section, the on/off valve for supplying paint to the painting gun 1-3 is turned on and held as it is.

Further, when the count progresses and the count value reaches the set value at point D, paint is supplied to the painting gun 1-1.

The on-off state of the on-off valve is released and turns off.

Further, when the count value reaches the set value of point E, the on/off valve for supplying paint to the painting gun 1-2 is turned on and held as it is.

Further, when the count value reaches the set value of the H point, the on-off state of the on-off valve for supplying paint to the painting gun 1-3 is released, and the on-off state is turned off.

Further, when the count value reaches the set value of point F, the on/off valve for supplying paint to the painting gun 1-2 is released from being held in the on state and becomes off.

When the gun carrier advances further and reaches a turning point K, the moving direction of the gun carrier is reversed, and the gun carrier travels back in the direction from the K point to the J point.

Control of the on/off valve on the return trip is also the same as in the above case.

In addition, Fig. 7 f, g, and h are painting guns 1-1 and 1, respectively.
-2 and 1-3 show the open/closed states of the on/off valves that supply paint.

On the return trip, when passing the count start point M,
The count value of the counter is reset by the count start sensor.

The gun carrier advances to point J, reverses direction at point J, and repeats the action again in the same manner as above.

The above is an example in which an up counter is used, but an up/down counter may be used to switch up and down at the turning point.

Moreover, although the case where one pair of painting guns 1-1 and 1-2 is used has been described above, there is no problem even if there is one or more pairs of these guns.

Further, there may be one or more painting guns 1-3.

As explained above, according to the method of the present invention, the painting gun 1-
1 and 1-2 can be placed close to each other, so paint gun 1-1
, 1-2 in the width direction of the section steel can be set to any value from l1=0.

Furthermore, the interval l1 does not need to be changed each time the type, size, or shape of the shaped steel is changed, which improves the efficiency of the painting operation.

Furthermore, since the painting guns 1-1, 1-2, and 1-3 can be placed adjacent to each other in the longitudinal direction of the shaped steel, the painting control of the painting guns in the longitudinal direction of the shaped steel can be performed at the same timing. This eliminates the need for a control device for shifting the on/off timing of each painting gun.

Furthermore, since the shape of the gun support member can be simplified and its dimensions can be reduced, there is also an effect that problems regarding the stability and strength of the gun support member can be eliminated.

[Brief explanation of drawings]

Figure 1 is an elevational view of the conventional painting method. Figure 2 is a plan view of the conventional painting method. FIG. 3 is a diagram showing an example of the arrangement of painting guns according to the method of the present invention. FIG. 4 is a plan view of an embodiment to which the method of the present invention is applied. FIG. 5 is an elevational view of an embodiment to which the method of the present invention is applied. FIG. 6 is a side view of an embodiment to which the method of the present invention is applied. FIG. 7 is a diagram for explaining on/off control of the painting gun. 1-1, 1-2 and 1-3: painting gun, 2: shaped steel,
3: table roller, 4: gun support member.

Claims (1)

[Claims] 1 At least one painting gun consisting of a first and a second painting gun, which are inclined at a predetermined angle with respect to the horizontal plane and arranged so that the paint spraying directions are opposite to each other when viewed in the width direction of the shaped steel. A pair of painting guns and at least one third painting gun arranged perpendicularly to the horizontal surface are reciprocated in the width direction of the section steel, and the first and second painting guns are used to form the shape. Controls on/off the spraying of paint from the first, second and third painting guns so that the vertical surfaces of the steel are mainly painted, and the third painting gun is used to mainly paint the horizontal surfaces of the shaped steel. A method for painting shaped steel, characterized by painting the shaped steel.