JPH02187175A - Method for painting outer peripheral surface of steel pipe sheet pile - Google Patents

Abstract

PURPOSE:To make a film thickness constant by providing a left-and-right moving stand above the center of a steel pipe sheet pile and providing a rotary drive body consisting of an ITV and a pulse generator to an up-and-down moving stand. CONSTITUTION:On the basis of the image of the direction of an initial painting position and the T-pawl 15 of a steel pipe sheet pile projected on the ITV 14 set above the center of the steel pipe sheet pile by a left-and-right moving stant 13 and an up-and-down moving stand 12, the T-pawl 15 of the steel pipe sheet pile is aligned with the center of the image using a rotary drive body 3. The steel pipe sheet pile 1 is rotated at equidistanced intervals by the pulse generator 11 of the rotary drive body 3 to be successively painted and subsequently returned to the initial painting position. When an accumulated set number-of-rotation difference calculation display 18 is not received within a positional shift tolerance value, the T-pawl 15 of the steel pipe sheet pile is again aligned with the center of the image projected on the ITV 14. By this method, safety and sanitation enhanced work can be performed.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is characterized in that spraying for moving steel pipe sheet piles back and forth is used in painting.
The present invention relates to a method of setting a fixed position in the circumferential direction of a steel pipe sheet pile during initial and continuous operation and painting the outer circumferential surface of the steel pipe sheet pile.

(Prior Art and Problems to be Solved by the Invention) In the conventional method for painting the outer peripheral surface of steel pipe sheet piles in a method in which the steel pipe sheet piles are moved forward and backward and painted by spraying, the operator Enter, 1 steel pipe sheet pile, 6 spray guns
Visually confirm that the spray pattern 7 discharged from the paint panel is in a fixed position that satisfies the coating direction of the paint batt shown in Fig. 5 and the appropriate wrap distance 10 shown in Fig. 6. 3 and the spray gun 6 was moved up and down by the operator using the swivel joint 5.

In the conventional painting method disclosed in JP-A No. 61-178057, which uses a combination of object position detection means and robot relative position correction function, the position detection means is affected by the bad environment inside the painting booth and cannot be maintained. However, there is a problem in that the robot relative position correction function cannot correct the absolute angle.

However, with the coating position setting method based on the operator's intuition, it is difficult to determine a fixed position and reproducibility cannot be expected. This effect results in variations in film thickness due to repeated coatings, which also leads to increased costs. Particularly recently, there are user needs for film thickness near the claws to be at the same level as the main tube, which is difficult to meet with conventional methods. In addition, since the work environment was inside a paint booth, the work was carried out in a bad environment where paint mist was prevalent.
Unfavorable from a health and safety perspective. Therefore, a single-sensor type and image processing method are being considered as a method for painting without an operator entering the painting booth. With the one-sided method and the image processing method, equipment, investment, and maintenance costs become prohibitive when considering the possibility of paint mist adhering to the equipment in the painting environment.

The present invention is a method for painting steel pipe sheet piles to solve these problems, and in the method of painting by moving the steel pipe sheet piles forward and backward and spraying paint, the circumferential position is set during initial and continuous operation, This method provides a method for painting steel pipe sheet piles without an operator entering the painting booth, without being affected by the painting environment, with a small capital investment, and with maintenance-free equipment. .

(Means for solving the problem) Figure 6 is an explanatory diagram of the painted baton in the longitudinal direction of steel pipe sheet piles.
The figure is a front view of an example of the apparatus used in the method of the present invention,
The figure is a side view of the device, and FIG. 3 is an explanatory view of the operation panel. In other words, the method for painting the outer peripheral surface of steel pipe sheet piles, which is the gist of the present invention, is shown in the embodiments shown in FIGS. 1 to 3. Street, steel pipe sheet pile 1
After aligning the outer surface of the steel pipe at the end in the circumferential direction by the rotary drive body 3, the steel pipe sheet pile 1 is moved back and forth on the rail by the trolley 2,
This continuous spraying is carried out using the ITV 14, pulse generator 11, and rotary transfer installed on the left and right movable frame 13 above the center of the steel pipe sheet pile 1, the vertically movable frame 12! This is a method for painting the outer circumferential surface of steel pipe sheet piles, which is characterized by repeatedly painting using a device consisting of a rotary drive body 3 that can be operated repeatedly by a digital switch 17 for setting an amount of rotation, and a cumulative set rotation amount difference calculation display 18.

The conditions of the present invention will be explained in detail below based on the embodiments shown in FIGS. 1 to 3. FIG. 1 is a front view showing an example of an apparatus for carrying out the method of the present invention, and FIG. 2 is a side view of the same.As shown in FIG. Along with the movement, a spray gun 6, which is a coating machine, is installed on the gun mount 4, and at the same time as the paint is sprayed, the trolley moves to spray paint at a predetermined longitudinal position. The method of the present invention is a method for efficiently coating the entire outer periphery of steel pipe sheet piles without leakage, and the apparatus for this purpose includes the rotary drive body 3, the pulse generator 11, and the pulse generator 11 shown in FIGS. Elevating movable frame 12
, a left-right movable frame 13, an ITV 14, a rotational movement amount setting digital switch 17, and a cumulative setting rotation amount difference calculation display 18. Next, the method of the present invention will be explained. Figure 5 is a diagram showing the coating pattern in the longitudinal direction of steel pipe sheet piles, and
The steel pipe sheet piles 1 shown in the embodiments shown in Figs. 3 to 3 are moved forward and backward by a trolley 2 at n number of equally spaced positions in the circumferential direction as shown in the painting pattern shown in Fig. 5, and mounted on a robot or a fixed gun mount 4. When painting efficiently without leaking with the spray nozzle 6, the initial coating position in the A direction in Figure 5 and the steel pipe sheet pile T claw 15 are copied using the ITV 14, which has been set in advance at the upper center of the steel pipe sheet pile using the left-right movable frame 13 and the elevating movable frame 12. Based on the image, the operator uses the rotary drive body 3 visually so that the steel pipe sheet pile T claw 15 is placed in the center of the image. Thereafter, the pulse generator 11 of the rotary drive body 3 rotates the steel pipe sheet pile 1 at intervals equally divided by the rotation amount set by the rotation amount setting digital switch 17. Painting position Return to direction A in Figure 5. At this time, if the cumulative setting rotation amount difference calculation display 18 is not within the positional deviation tolerance, the steel pipe sheet pile T
The nail 15 is aligned again with the center of the image captured by the ITV 14, and painting is repeated a set number of times. By this method, variations in film thickness between the steel pipe sheet pile 1 itself and other steel pipe sheet piles are reduced, and the safety and health aspects of the operator are also improved. Sho ITV
14 can be set according to the size of the steel pipe sheet pile 1 using the horizontally movable frame 13 and the vertically movable frame 12, and is not affected by the coating booth 9 which is the coating environment, so it can be implemented with a small capital investment.

(Example) When spray painting urethane elastomer 2.5 mm around the half circumference of the steel pipe sheet pile, the horizontally movable frame 13 and the vertically movable frame are installed at the center of the span width of the rotary drive body 3 according to the embodiment shown in FIGS. 1 to 3. 12 to adjust 1TV14 and match the images. The above position is the initial stop position. Next, the rotational movement amount of the rotary drive body 3 is set by the rotational movement amount setting digital switch 17 according to the number of directions in which the outer circumferential length of the steel pipe sheet pile can be equally divided by the length of the spray button 7 or less. The number of times of coating in each direction is determined from the speed of the truck 2 calculated from the urethane elastomer sag limit film thickness and the discharge amount. Each time the initial position and cumulative setting rotation amount difference calculation display 18 during the above-mentioned continuous coating exceeds the allowable value, the steel pipe sheet pile T claw 15 and IT
Correction is made by inching the rotary drive body 3 at the center of the image of V14.

For example, in the case of a 400φ steel pipe sheet pile, the center of the rotary drive body 3 with a span width of 4001
I installed TV14 and the image projection distance is good! llt100
Raise and lower the movable frame 1 so that the steel pipe sheet pile T claw 15 is at 0 mm.
Adjust according to 2. Spray baton 600mm, urethane elastomer sag limit film thickness 400μ, discharge amount 4000
g/min, the speed of the 4-direction, 7-time coating trolley is set to 30 M/min, and the set rotation amount of the rotary drive body 3 is set to 210 mm. From the steel pipe sheet pile T claw 15 appropriate nozzle angle of 27.1 to 33.4 degrees, the cumulative setting rotation 1 difference tolerance is ±3 mm, so after initial stop alignment, each time the cumulative setting rotation ball difference calculation display 18 exceeds the tolerance. By repeating the position correction, it is possible to reduce variations in film thickness within the steel pipe sheet pile and between other steel pipe sheet piles.

(Effects of the Invention) The method for painting the outer periphery of steel pipe sheet piles according to the present invention has the following excellent effects compared to conventional methods.

■ Compared to the conventional position setting based on the operator's intuition, the coating position is fixed and reproducible, so variations in the thickness of the steel pipe sheet pile itself as well as between other steel pipe sheet piles are reduced, leading to cost reductions.

■ It can be applied to the expected future measures to equalize the film thickness of the nails (robotic painting by setting fixed positions).

■ Operators do not have to enter the painting booth, improving safety and health.

■ Maintenance-free IJ-1 without shadow C under painting environment
It can be installed with a small capital investment.

[Brief explanation of the drawing]

Fig. 1 is a front view of the apparatus in an embodiment of the coating according to the present invention, Fig. 2 is a side view of the same, Fig. 3 is an explanatory diagram of the operation panel, Fig. 4 is a front view showing a conventional coating method, Fig. 5 is an explanatory diagram of the painting baton in the longitudinal direction of the steel pipe sheet pile, and Fig. 6 is an explanatory diagram of the appropriate lap amount. 1... Steel pipe sheet pile 2... Cart 3... Rotation drive body 4... Gun mount 5... Swivel joint 6... Spray gun 7... Spray button 8...
・Operation panel 9...Painting booth 10...Wrap fee 11...Pulse generator 12...Elevating and lowering movable frame 13...Left and right movable frame 14...ITV 1.5...Steel pipe sheet pile T claw 16... Image 17... Rotational movement amount setting digital switch 18... Cumulative setting rotation amount difference calculation display Figure Figure Figure

Claims (1)

[Claims] 1. A method of continuously spray painting the steel pipe sheet pile by moving the steel pipe sheet pile back and forth in the longitudinal direction after circumferentially positioning the outer surface of the steel pipe at the end of the steel pipe sheet pile using a rotary drive body, the method comprising: The above-mentioned ITV is equipped with a device consisting of an ITV that has horizontal and vertical movement functions for projecting a surface, a steel pipe sheet pile rotation driver that can repeatedly operate at a set rotation amount, and a function to calculate the cumulative set value rotation amount difference during repeated rotation operation. The rotation drive body aligns the position based on the image captured by the rotation drive body, and the steel pipe sheet pile is rotated at intervals equally divided by the rotation amount set by the pulse generator of the rotation drive body, and the cumulative set rotation amount difference is calculated and displayed. A method for painting the outer peripheral surface of steel pipe sheet piles, which is characterized by repositioning and repeatedly painting if the value is not within a tolerance value.