JPS5910266B2 - Color band marking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color band marking device, specifically,
, relates to a device for automatically marking color bands for marking steel pipes.

In order to distinguish dimensions, standards, grades, destinations, etc., as well as for in-house storage management at the request of customers,
A color band for identification may be attached to the outer circumference of steel pipes.

Various methods have been used to mark such color bands, but no satisfactory device has yet been found in terms of ease of operation and economy. That is, a manual method using a paint brush has been used for a long time, but accurate marking requires skill and is not suitable for mass production.

Therefore, as an improved method, the method shown in FIGS. 1 and 2 has been used. In the former case, the steel pipe 1 to be marked
is placed on both rollers 2 and 2' rotating in the same direction, and the paint is sprayed from the spray gun 3 while rolling to make a mark. At this time, both rollers are driven using a chain or a belt provided with an idler wheel and a drive wheel as shown in the figure. Gear train drive methods have also been used, but either method requires a special drive mechanism, is difficult in terms of mass production, and requires additional installation of a steel pipe transfer device. In the latter case,
A rubber roller 5 is placed on the lower surface of the steel pipe 1 rolling on the skid 4.
Alternatively, this can be done by bringing a rubber plate into contact and applying paint to the surface of this rubber roller. In the illustrated example, the roller shafts of the rubber rollers 5 are attached to both sides of the paint tank 6, and the necessary solvent is mixed with the paint T stored in the paint tank 6, so that the lower part of the rubber roller 5 is immersed in this. This method also requires some kind of steel pipe drive mechanism and lacks mass productivity, as in the example shown in FIG. 1, and in particular, the evaporation loss of the solvent mixed with the paint cannot be ignored. In order to eliminate these drawbacks,
Automatic color band marking equipment is being trialled. Since this device has a structure that combines mechanical and electrical automatic control mechanisms, maintenance of the device is troublesome and operation requires skill, and marking costs are high. The purpose of this invention is to eliminate the various drawbacks of the conventional method as described above, and to reduce the dead weight of a steel pipe that is rolling down.
It has a simple structure that uses a method to utilize it, and it is characterized by efficient marking without requiring any skill. 3 and 4 showing an embodiment of the present invention, a paint injection nozzle 8 is attached to a nozzle holding member 9, connected to a paint supply source 11 via a flexible tube 10, and penetrated through a slit plate 12. Color band markings are applied by spraying paint through the provided slits 13.

Of course, if several slits are provided, several color bands can be marked at once. Next, a driven roller 14 is rotatably attached to the upper end of the nozzle holding member 9 so that it can roll in contact with the steel pipe 1, and the lower end is fixed to a sliding member 15, which will be described below. As in the embodiment of FIG.
When the sliding members 15 and 151 are disposed oppositely, it goes without saying that the lower end of the nozzle holding member 9 is fixed to both of them. The sliding member 15 is configured to slide up and down while being guided by a guide shaft 16 which is disposed below the sloped skid 4 and at a steeper inclination than the skid 4. Here, the relationship between the guide shaft 16 and the nozzle holding member 9 is a piston and cylinder type. Thus, the sliding members 15, 15I preferably have tension springs 17 at their upper ends.
, 1r are fixed, and the upper end of this tension spring 17 is fixed to the upper end of the guide shaft 16. If you configure it like this,
The sliding member 15 is guided by the guide shaft 16 and slides down together with the driven roller 14 that rolls in contact with the steel pipe 1K that rolls down on the skid 4 due to its own weight. At this time, sliding member 1
5 and 15I descend against the tension of the tension springs 17 and 1r, and when the sliding roller 14 reaches the position shown by the broken line as shown in FIG. Climb back to position. Next, detectors 18 and 19 are arranged to detect both positions of the steel pipe at the start and end of marking to control the start and end of paint spraying performed by the spray nozzle.

The detector may be a detection method using a proximity switch, ultrasonic waves, or infrared rays, and the distance between the two detectors 18 and 19 is determined according to the outer diameter of the steel pipe. In the embodiment shown in FIG. 4, this injection control is performed by connecting a compressed air source 20 to an air injection type injection nozzle 8 through a flexible tube 21, and opening and closing an intervening electromagnetic valve 22. . As can be seen from the above description, unlike conventional systems, the marking device of the present invention is a simple device that does not require a steel pipe transfer mechanism and a drive source, and can perform automatic continuous marking easily and in mass production.

Moreover, by replacing the slit plate, the number of mark bands can be freely selected and can be widely applied to a wide range of pipe diameters.

[Brief explanation of drawings]

1 and 2 are schematic diagrams of a conventional marking device of this type, FIG. 3 is a schematic side view of an embodiment of the present invention, and FIG. 4 is a partially enlarged plan view thereof. DESCRIPTION OF SYMBOLS 1... Steel pipe, 4,45... Skid, 8... Injection nozzle, 9... Nozzle holding member, 11... Paint supply source, 12... Slit plate, 13... Slit, 14
...Followed roller, 15, 15'...Sliding member, 16
, 16 (... guide shaft, 17, 1r... tension spring, 1
8, 19...Detector, 20...Compressed air source, 22.
··solenoid valve.

Claims (1)

[Claims] 1. A device for marking color bands on steel pipes, which includes a skid provided at an angle, a guide shaft located below the skid and at a steeper inclination than the skid, and
a sliding member slidably attached to the guide shaft; a spring having both ends fixed to the upper end of the guide shaft; a driven roller attached to the sliding member; a slit plate attached to the moving member; a first detector for detecting that the steel pipe has reached a marking start position; and a second detector for detecting that the steel pipe has reached a marking end position; attached to the above sliding member,
and an injection nozzle that starts spraying paint when the first detector detects the steel pipe and ends spraying the paint when the second detector detects the steel pipe. Band marking device.