JPH0420534Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a support device for a cast iron pipe having a socket at one end and an inlet at the other end when painting the inner and outer circumferential surfaces, especially the outer circumferential surface. .

Conventional technology Figure 6 is a front view of a pipe in a conventional painting process.
FIG. 7 is a right side view of FIG. 6. In these figures, the tube 50 has a receptacle 50a at one end and an inlet 50b at the other end, but the receptacle 50a has a larger diameter than the receptacle 50b, so the tube 50
When painting, the body portion 50c having a uniform cross section is supported in the horizontal direction by two pairs of rollers 51, 51. Thereafter, while the tube 50 is rotated around its axis by driving the rollers 51, 51, coating is performed over the entire length and circumference of the tube 50 by the coating nozzle 52 that moves in the direction of the tube axis.

Problems to be Solved by the Invention In such a conventional configuration, the body 50 of the tube 50
Scratches 53, 53 occur on the entire circumference of the coating film c at two locations corresponding to the width of the rollers 51, 51.
After coating with the coating nozzle 52, the scratches 53, 53 must be repaired by hand painting, which poses a problem of lowering productivity.

The purpose of the present invention is to solve the above-mentioned problems, and the purpose is to provide a tube support and rotation device that is less likely to cause noticeable scratches on the coating film on the outer circumferential surface of the tube, and can be repaired in a short time even if they occur. shall be.

Means for Solving the Problems In order to achieve the above object, the present invention includes a pair of first support rollers that support the socket end of a pipe whose axis is arranged in a horizontal direction; a first spacing adjustment device that adjusts the spacing between the support rollers; a first rotary drive device that rotationally drives the first support roller and is controllable in speed; and a pair that supports the insertion end of the tube. a second support roller of
A second roller that adjusts the roller spacing between the support rollers of
and a speed-controllable second rotary drive device that rotates the second support roller independently of the first support roller.

Effect According to the above configuration, the outer diameters of the socket end and the insertion end of the pipe are different from each other, so the socket end is placed on the first support roller, and the insertion port is placed on the second support roller. The distance between the first and second support rollers is adjusted so that the axis of the tube is correctly horizontal when the end is placed on the tube. In addition, the circumferential speed of the socket end and the socket end are different during rotation, so
The first support roller is controlled to match the peripheral speed of the socket end, and the second support roller is controlled to match the peripheral speed of the socket end, thereby preventing slippage between the pipe and the support roller. .

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

In Figures 1 to 4, 1 is a pipe to be painted, and the outer diameter of the socket end 1a at one end is larger than that of the socket end 1b at the other end. There is. Here, reference numeral 2 denotes a socket side support rotation device, which is configured to support and rotate the socket end 1a.
Reference numeral 3 denotes a support rotation device on the socket side, which is configured to support and rotate the socket end 1b. 4 is a painting position where these devices 2 and 3 are installed.

In the socket side support rotation device 2, the socket end 1a
Flanges 6, 6 used for axial positioning of the socket end 1a are formed at one ends of the pair of first support rollers 5a, 5a that support the socket end 1a. The first spacing adjustment device 7a that adjusts the roller spacing between the first support rollers 5a, 5a includes sliding tables 8a, 8a on which the first support rollers 5a, 5a are individually rotatably supported; Guide rails 10a, 10a support the sliding tables 8a, 8a so as to be slidable in the horizontal direction perpendicular to the axis of the tube 1, that is, in the direction of arrow A, on the upper surface of the supporting table 9a, and the sliding tables 8a, 8a. It is provided with a feed screw 11a for horizontally moving the feed screw 11a, and a motor 12a for rotating the feed screw 11a. The feed screw 11a is supported by the support base 9a, and is connected to the slide bases 8a, 8 by mutually opposite male threads.
It is screwed into a nut (not shown). Therefore, the sliding tables 8a, 8a, that is, the first support rollers 5a, 5a, move away from each other when the feed screw 11a rotates in one direction, and approach each other when the feed screw 11a rotates in the opposite direction.

In the socket side support rotation device 2, the first rotary drive device 13a whose speed can be controlled has sliding bases 8a, 8
Worm reducers 14a, 14a provided in a
, a drive shaft 15a serving as a common input shaft for both worm reducers 14a, 14a, and a motor 16a connected to this drive shaft 15a. The output shafts of the worm reducers 14a and 14a are the first
Rotating shafts 17a, 17a of support rollers 5a, 5a
When the motor 16a is driven, the drive shaft 15a and each worm reducer 14
First support rollers 5a, 5a via a, 14a
are designed to rotate in the same direction. Since the distance between the first support rollers 5a, 5a is adjusted in the direction of the arrow A, the worm reducers 14a, 14a, which are displaced together with the first support rollers 5a, 5a, are axially movably connected to the drive shaft 15a by a spline or the like.

On the other hand, the second interval adjustment device 7b in the socket side support rotation device 3 also has two sliding stands 8 that are slidable in the direction of the arrow A, similarly to the first interval adjustment device 7a.
b, 8b. In this case, the sliding table 8b,
The support stand 9b for supporting 8b is the fixed stand 36
It engages with guide rails 18, 18 formed on the upper surface of the tube 1, and is slidable in the direction of the tube 1.
A drive device 19 that drives the support base 9b in the direction of arrow _B1 is configured such that a motor 21 rotates a feed screw 20 that is supported by a fixed base 36 and screwed into a nut (not shown) of the support base 9b. ing.

In the inlet side support rotation device 3, a pair of second support rollers 5b that support the inlet end 1b of the tube 1;
5b has no flange. However, other devices, such as a second spacing adjustment device 7b that adjusts the roller spacing in the horizontal direction (direction of arrow A) between the second support rollers 5b and 5b, and a second spacing adjustment device 7b that adjusts the roller spacing of the second support rollers 5b and 5b, A speed controllable second rotary drive device 13b that rotates independently of the rollers 5a, 5a has exactly the same configuration as that of the socket side support rotary device 2. Therefore, similar members are designated with similar numbers and detailed description thereof will be omitted.

As shown in FIG. 5, a tube carrying cart 23 with a lifter 22 is placed on the floor between the socket-side support and rotation device 2 and the inlet-side support and rotation device 3. Guide rails 24, 2 for guiding in a perpendicular horizontal direction, that is, a direction perpendicular to the plane of the paper in FIG.
4 has been installed. In addition, the support rotation device 2 on the socket side and the support rotation device 3 on the socket side are connected by the pillars 25, 25.
An exterior painting trolley 27 that moves horizontally along the axis of the tube 1 in the direction of arrow _B2 is installed on the frame 26, which extends above the tube. 2
8 is its guide rail. Exterior painting trolley 2
Lifting member 2 of the lifting cylinder 29 installed at 7
9a is an external spray nozzle 3 that protrudes below the truck.
0 is supported. Furthermore, on the floor on the side of the inlet side support rotation device 3, there is an inner surface coating trolley 3 that moves horizontally in the direction of arrow _B3 along the axis of the tube 1.
1 is installed. 32 is its guide rail. The inner surface painting trolley 31 supports, by a lifter 33, a base portion 34a of an arm 34 that is horizontally inserted into the pipe 1, and an inner surface spray nozzle 35 is provided at the tip of the arm 34.

Next, the painting work will be explained in detail.

First, as shown in FIG. 1, the position of the support stand 9b, that is, the position of the second support roller 5b, is adjusted in the direction of arrow _B1 by driving the motor 21, and the first
The distance between the second support roller 5a and the second support roller 5b is adjusted to the length of the tube 1 to be coated. Further, since the outer diameters of the socket end 1a and the socket end 1b of the pipe 1 are different, the socket end 1a is placed on the first support rollers 5a, 5a, and the socket end 1a is placed on the second support rollers 5b, 5.
The motors 12a, 1 are set in advance so that the axis of the tube 1 is in the horizontal direction when the insertion end 1b is placed on the tube 1b.
2b to adjust the distances between the first support rollers 5a, 5a and between the second support rollers 5b, 5b.

Next, the pipe 1 is placed on the lifter 22 of the pipe transport trolley 23.
Place it horizontally and transport it to painting position 4. When the tube transport truck 23 reaches the coating position 4, the lifter 22 is driven to lower the tube 1. This results in
The socket end 1a of the tube 1 is connected to the first support rollers 5a, 5.
a, and the socket end 1b is received by second support rollers 5b, 5b. At this time, the pipe transport trolley 23 is kept on standby at the painting position 4.

Thereafter, the tube 1 supported across the first support rollers 5a, 5a and the second support rollers 5b, 5b is pressed in the direction of arrow _B4 in FIG. 1a to the first support rollers 5a, 5
a to the flanges 6, 6, and position the tube 1 in the axial direction.

Next, the first support rollers 5a, 5a and the second support rollers 5b, 5b are rotated by driving the motors 16a, 16b. At this time, tube 1
Since the outer diameters of the socket end 1a and the socket end 1b are different from each other and the circumferential speeds are also different, the first support rollers 5a, 5a are set at the peripheral speed of the socket end 1a, and the second
The support rollers 5b, 5b are controlled in speed according to the circumferential speed of the insertion end 1b, and the tube 1, the first support rollers 5a, 5a, and the second support rollers 5b, 5b are
This prevents slippage between the

With the tube 1 being rotated by the support rollers 5a and 5b in this manner, the outer circumferential surface of the tube 1 is sprayed from the outer surface spray nozzle 30 of the outer surface painting truck 27 that has been waiting above the insertion end 1b of the tube 1 in advance. While spraying the paint, move this exterior painting trolley 27 to the socket end 1.
Move at a constant speed toward the a side. In addition, in the inner surface painting trolley 31, the inner surface spray nozzle 35
Adjust the height position of the lifter 33 to match the diameter of the pipe 1.
This inner surface painting trolley 31 is adjusted in
is moved at a constant speed to insert the inner spray nozzle 35 into the insertion end 1b of the tube 1, and at the same time spray paint onto the inner circumferential surface of the tube 1 from the inner spray nozzle 35.

External painting truck 27 and internal painting truck 31
When the outer circumference coating and inner circumference coating over the entire length of the pipe 1 are completed, each nozzle 3
Stop spraying paint from 0 and 35, and remove both bogies 2.
7 and 31 to their original positions, and the rotation of the tube 1 is stopped.

Thereafter, the lifter 22 of the pipe transport trolley 23 waiting at the coating position 4 is raised, and the lifter 22 lifts the support rollers 5a, 5a, 5b, 5b.
The pipe 1 is picked up from the pipe 1, and the pipe 1 is transported to the next stage by traveling of the pipe transport trolley 23.

The next tube is then painted in the same manner.

In the above, since the tube 1 is rotated with only the socket end 1a and the socket end 1b being supported, noticeable scratches are unlikely to occur on the coating film on the outer periphery of the tube, and even if they occur, the width of the scratch is small. Since it is narrow, it can be easily repaired. Moreover, although the outer diameters of the socket end 1a and the socket end 1b are different from each other,
Since the tube 1 can be supported accurately in the horizontal direction, uniform coating is possible. Furthermore, since the support roller 5a that supports the socket end 1a and the support roller 5b that supports the socket end 1b are driven individually, the sliding between the pipe 1 and both support rollers 5a and 5b is ensured. can be prevented.

Note that since the outer diameter and length of the socket end 9a and the socket end 1b differ depending on the type of pipe 1, the spacing between the support rollers 5a and 5b and the support roller 5 are determined in advance.
By inputting data corresponding to the positions of b and 5b in the tube axis direction into a microcomputer or the like and programming it, various types of tubes can be supported quickly. At this time, support rollers 5a, 5a and 5b,
The distance between the feed screws 5b can be adjusted by reading the number of rotations of the feed screw with a rotary encoder or by providing a limit switch. Moreover, as the motors 12a and 12b for rotating the support rollers, inverter motors that can control the rotation speed by pulses are suitable.

Effects of the Invention As described above, according to the present invention, noticeable scratches are less likely to occur on the coating film on the outer circumferential surface of the pipe, and even if they do occur, the width of the scratches is narrow and can be easily repaired in advance.

[Brief explanation of the drawing]

Fig. 1 is a front view of a tube support and rotation device according to an embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, and Fig.
The figure is a left side view of Fig. 1, Fig. 4 is a right side view of Fig. 1, and Fig. 5 is a front view showing the entire pipe coating device.
FIG. 6 is a front view of the conventional example, and FIG. 7 is a right side view of FIG. 6. DESCRIPTION OF SYMBOLS 1...Pipe, 1a...Socket end, 1b...Socket end, 5a...First support roller, 5b...Second support roller, 7a...First interval adjustment device, 7b
...Second interval adjustment device, 13a...First rotational drive device, 13b...Second rotational drive device.

Claims (1)

[Scope of utility model registration request] a pair of first support rollers that support the socket end of a pipe whose axis is arranged horizontally; a first spacing adjustment device that adjusts the distance between the first support rollers; a speed controllable first rotary drive device that rotationally drives one support roller; a pair of second support rollers that support the insertion end of the tube;
a second spacing adjustment device that adjusts the roller spacing between the second support rollers; and a speed-controllable second rotary drive device that rotates the second support roller independently of the first support roller. A tube support rotation device characterized by comprising: