JPS59199424A - Method of labelling spiral steel pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for pretreatment and labeling for applying a label near one end of a spiral steel pipe.

Traditionally, steel pipes with an outer diameter of 400 mm or more, called large-diameter steel pipes, have been labeled for product control by handwriting, spraying paint, labeling, etc. in order to determine the direction of the pipe and to trace for quality control purposes. Kouo t (・ru.

In pipe manufacturing methods using thick steel plates (thick plates) as raw materials, such as the UO free method, press bending method, and roll bending method, one large diameter steel pipe is manufactured from one sheet of material, so the length Equally ordered material is also determined before pipe making (
It is possible to carry out quality control markings on the actual product at the flat plate stage.

On the other hand, in the case of Sunokuiral steel pipes made from hot-rolled steel strips,
Since the unit weight of the raw material (coiled steel strip) is 30T to 40T, several steel tubes from the same steel strip are manufactured continuously and cut to a predetermined length at one point. Ru.

For this reason, steel pipes with the same outer diameter and thickness but different directions or lengths are manufactured from the same steel strip.
Direction is for quality control display & willpower for cutting; Display cannot be done until immediately after the decision is made. Normally, when the pipe leaves the pipe making line and enters the finishing and inspection line, the order in which the pipe was cut is shown. is disturbed, making it extremely difficult to trace both technically and equipment-wise.

For this reason, conventionally in the case of the Sunoku Iral pipe manufacturing method, the operator holds a label or paint knife in his hand immediately after the cutting machine where the cutting order is not disturbed, and marks the actual product by pasting the label and writing in paint. It's here.

On the other hand, there is not enough space near the cutting machine, and it is full of flux for submerged arc welding, cutting fume, etc.
Since full-scale mechanization requires enormous equipment costs, operators must enter the machine themselves and directly touch the spiral steel pipes that are being formed or have just been cut. This situation has led to problems such as insufficient display, reduced work efficiency, and increased risk of human accidents.

The present invention has been devised for labeling work in this respect, and in addition to removing mill scale, red rust, dust, etc. from the inner surface of the previous steel pipe, the present invention mechanizes the labeling work. Furthermore, this is done in a small-scale facility in order to prevent accidents for operators and improve work efficiency.

FIG. 1 shows an example of a commonly used label.

Among the contents, manufacturing thickness, tube internal light, and size (length) are individual management items for tubes that occur for the first time during tube manufacturing and when cutting decisions are made. There are various sizes of labels, but generally (3~
5 cnL) x (5 to 10 cnL).

FIG. 2 is a diagram showing the flow of the spiral steel pipe after bath welding and cutting. First, a coiled steel strip 1 is unwound to a flat plate state 2, and after being formed into a spiral steel tube and welded at a position 3 to become a spiral steel tube, it advances along a line called a delivery section and is cut at a line 4. . The tubes that have been cut into products are once separated by rapid transport to prevent collisions with the tubes on the delivery line. After that, as shown in 6, the pipes discharged onto the skid proceed to the finishing and inspection process, but the inspection specifications usually differ and the direction depends on the tip and the details of accessory processing. A separate process will be required as in '8 and '9.

That is, in order to properly manage the actual item, display work such as pasting a management label on the actual item must be performed before 6. To do this, label 9 in 4 or 50 steps.
It is necessary to display the actual product, but as mentioned above, it is extremely difficult to mechanize due to the lack of space, flux for submerged arc welding, and fume when cutting pipes. Labeling and other display work has been done manually at location 4.

The present invention eliminates such difficulties and provides a technique for accurately attaching labels to indicate the actual product without requiring an operator to enter the production line.

Next, the method of the present invention will be explained based on the drawings.

FIG. 3 is a diagram showing the system of the method of the present invention.
In the figure, 10 indicates the details of the tube to be cut, i.e., the co-manufactured tube AFr, the direction indicates the storage device that stores the length, and 101 indicates the display device that displays the necessary details. show. The details of the pipe to be cut are entered in advance into the storage device for each outer diameter, plate thickness, and length, that is, for each pipe manufacturing lot (11 is a cutting signal provided on the cutting device operation panel). This is a transmitting device, and from the start of cutting to the completion of cutting, the operator can use the Write Pen Select (Write Pen) on the screen from the 1st grain of the lot to the final 5elect) method and input the information into the storage device.

12 indicates a tube detection device. A pipe detection device is installed in a space where equipment can be easily installed and in a position that is not exposed to the 7 lux I-F cutting fume, and the
It is confirmed that the pipe has passed through the device to reach the main port, and a signal is sent to the aforementioned storage device each time. Based on the signals emitted from the display device 10', the cutting signal transmitting device 11, and the tube detecting device 2, the printing device 13 prints information such as manufacturing size, blue stone, standard type, direction, size, date of manufacture, etc. in a predetermined format. Data necessary for managing the actual item is printed and pasted on the inner surface of the pipe by the label pasting device 14. A sequencer 14' performs an operation check to ensure that these series of operations are performed reliably.

Figure 4 shows the state of the label 15 affixed to the surface of the tube. Normally, labels are placed on the inner surface of the tube to prevent the printing from disappearing or fading due to skid transfer or sunlight, and to make it easier to read when stacked. It is pasted several tens of millimeters to several hundred millimeters from the end of the tube. Also, if it is pasted on the bead on the inner surface of the pipe, it will cause problems such as curling or peeling, and it will be difficult to read the printed information, so it is necessary to avoid the 15' bead when pasting it, as shown in Figure 4. be.

FIG. 5 shows an apparatus and an enlarged view thereof relating to the tube detection and labeling method of the present invention, and the method of the present invention will be explained below. 1
G indicates the drum-shaped rolls that feed the tube, and these rolls are grouped into 1
．． 7. Divide into 3 blocks: 1.8.19. In addition, a phototube for tube detection is shown. The tube 21 moves in the direction of the arrow, once blocks the phototube 20, and moves back to the position shown at 21'. When the phototube is activated again, it can be seen that the tube has entered the block 18. This phototube 20 is for detecting the rear end of the tube. 12 indicates a contact type or non-contact type limit switch, and 18
Stop all the drum-shaped rolls in the block. 2
2 indicates a brush for cleaning the inner surface of the tube, and 2 indicates a brush stand movable in a direction perpendicular to the tube axis. At the same time as the pipe 21' stops, the mount moves on the frame 24 to approximately the center line position of the drum-shaped roller group, and the brush 22 for cleaning the inner surface of the pipe is inserted into the pipe, and the label is pasted by brushing and blowing air for a certain period of time. Perform surface treatment at the location and in the vicinity. Commercially available disc-shaped brushes are usually used, and brushing is performed by rotating them. This surface treatment is to remove mill scale, surface rust, dust, etc. from the label end portion. Cleaning brush 22 after base treatment for a certain period of time
Then, the frame device returns to its original position through a reverse operation to the above-described operation. 1.3.14.5 respectively indicate a printing device, a label pasting device, and a pedestal supporting them.

As shown in FIG. 5, the printing device 13 is fixedly arranged on the outside of the tube.
No/+1, , : Monkey, hi: ++ White 7.1:
ri・l, I'a warning J'I()
l: +′・′ Nori 1・] shi) ,X
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It is rolled into a roll. Attach one end of the paper to the take-up roll. Also, the label paper is set so that it passes through the printing device. When two bells pass through the printing device, the winding of the tape is stopped for about 5 to 30 seconds, and the necessary information is printed on the label using a general printer.

After printing, the label is pulled out from the printing device together with the paper by a take-up roll. After that, between the printing device and the take-up paper roll, a sharp guide is provided so that the paper can be folded sharply, and labels made of a thicker material than paper should be used. is peeled off from the paper as it passes through the sharp guide.

The above is a series of operations in the printing device.The label that is being peeled off from the paper is sucked by the roller for label suction and pasting of the label pasting device 14; Wind it up. In this state, the label is carried into the pipe. In other words, upon receiving the aforementioned signal that the pipe interior cleaning work has been completed, the 25 mounts move on the frame 24 and detect the bead detection device where the group of drum-shaped rollers are located, from the pipe end several tens of millimeters away from the bead. Number 1
The roller used for label suction and pasting is moved seven times at the 00 mm position. To apply the label by suction, stop the suction of the roller after seven strokes and apply the label to the inner surface of the pipe.

FIG. 6 shows details of the labeling device 14. The roller applicator 14 is attached to a pedestal 25 and can be moved together with the pedestal to approximately the center of the drum-shaped roller conveyor line. After that, the bead detection device 27 is activated by the entry cylinder 26, and the roller 2 for label suction and pasting is activated.
8. The label sticking head equipped with the label pressing cylinder 30 and the label suction pressing device rotation motor 31 is introduced into the inner surface of the tube.

Immediately after the head enters the pipe and is moved to the stroke limit of the entry cylinder 26, a non-contact type bead detection device 27 using contact or magnetism detects the beat, that is, the excess welding. Check whether the plate 9 is in the position to paste the label.

If it is determined from the information from the bead detection device that the label 32 will be pasted on the bead 15' as shown in FIG. The return allowance was set in consideration of
, the label pressing cylinder 30, and the label suction/pressing device rotation motor 31 are operated to perform labeling work on the inner surface of the tube.

Further, as mentioned above, the label is sucked by the label suction roll using the sharp guide section installed between the printing device and the paper take-up roll, and the label is received and the label is pasted on the inner surface 1 of the tube. After that, it returns to its original position through the reverse operation described above.

When this return signal is received, the drum-shaped roll in block J9 is driven 5, and the tube 21' is moved to block J9. The passage of the rear end of the tube is detected in the same way as the phototube provided.A system has been set up in which no tube can enter block 17 or block 18 while the phototube 29 does not detect that the rear end of the tube has passed. However, after the phototube 29 detects that the rear end of the tube has passed, it is possible to send a signal from block 7 to block j8 that the tube can enter.

Using the above series of methods, the operator can reliably apply the label completely to the tube without cutting it.

As described above, using such a device, it has become possible to apply a label to the inner surface of a S)Z spiral steel pipe while avoiding beads.

The labeling method of the present invention is fully applicable not only to steel pipes, but also to large-diameter steel pipes such as UO steel pipes and bending roll steel pipes, and allows for highly efficient and safe work through automation and labor saving. It brings wealth and power.

It should be noted that it is also possible to print braille type directly on the tube instead of using RAIL, and to print limited colors, shapes, etc. directly on the tube using pentacles, etc. using the above method. .

[Brief explanation of the drawing]

Figure 1 is a label for managing the actual spiral steel pipe, Figure 2 is a diagram showing the flow from spiral steel pipe manufacturing to finishing process,
Figure 3 shows the label pasting system, Figure 4 shows the label pasted on the inner surface of the spiral steel pipe near the pipe end, and Figure 5 shows the label pasting device and its front and back pipe detection, ordering collision prevention device and system. FIG. 6 is a diagram showing details of the rubber pasting device head 14, and FIG. 7 is a diagram showing solid lines showing the rubber 33 pasted avoiding the bead. ■... Coiled steel strip, 2... Flat plate after unwinding the coiled steel strip, 3... Spiral forming, welded part, 4... Pipe cutting position, 5... Pipe cut to predetermined length. , 6, 7, 8.
9...Pipe in flow to the finishing process, 10...Storage device, 10' display device, 11...Cutting instruction input device,
]2... Fog edge detection device, 13... Printing device, ■, 4...
Ra\ru pasting device, 14<・Sequencer-115...Ra\ru, 15'...Bead (excess welding part), 16...
Tube conveyance roller, 20.29...Photocell, 21, 21
'...Spiral steel pipe, 22...Cleaning brush, 23
... Brush stand, 24... Frame, 25... Label pasting device stand, 2G... Cylinder for entering the inner surface of the head tube for label pasting, 27... Bead detection device, 28... Roller for label suction pasting, 30...Cylinder for label pressure, 31...Rahe/l/ pasted 4"J spatula) turning motor, 32...Beat" second label, 33...Labeno 1/ pasted avoiding the heat. Patent applicant Representative patent attorney Tomoyuki Yabuki (and 1 other person)

Claims (1)

[Claims] (+) In the process of manufacturing spiral steel pipes, each device is supported so that it moves in a direction perpendicular to the front transport roll line in the work of pasting a label near the inner end of each steel pipe. The above-mentioned devices are mainly a printing device installed at one end of the labeling equipment, a labeling device that moves from one end to the center of the tube conveyance, and a labeling device that moves from the other end to the front conveyance. It consists of a cleaning device that moves at the center 1 of the roll line, and the steel pipes being conveyed are stopped in the direct line of the labeling equipment.First, the cleaning device moves to the vicinity of the ends of the steel pipes and labels the steel pipes using a wire brush, air, etc. After cleaning the pasting position and returning to the original position, the label pasting device receives the specified label from the printing device, moves to the vicinity of the ends of the steel pipes, and uses the label pasting roller to place the label at the pasting point. A method for labeling a spiral steel pipe, which is characterized in that after returning to the position, the labeling work is completed by moving the steel pipe to a subsequent process. 2. The method according to claim 1, further comprising inputting the information to a printer and printing the information on the label by a printing device via the device. (3) Input to the storage device is from the first grain of the lot to the final N on the screen of the separately provided pipe details display device.
3. The method according to claim 2, wherein the wood grain is marked and input using a light pen selection method.