JP2660645B2 - Hoop detection device with coil bound - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoop detection device having a coil bound, particularly for a robot printing device.

[0002]

2. Description of the Related Art A coil formed by winding a rope in a roll shape has its outer periphery bound by a hoop made of a steel band at several places in the coil axis direction at intervals, and a lot number and the like are printed on the outer peripheral surface in a dot matrix. It is printed by a robot printing device and shipped. Printing by the robot printing device
It is applied to the coil peripheral surface other than the hoop so that it can be seen when the hoop is removed, but it is necessary to detect the position of the hoop.

A conventional coil hoop detecting device is shown in FIG.
The roll 3 is supported in a floating state via floating support means 2 composed of an air cylinder connected to the robot printing apparatus, and is placed on the peripheral surface of the coil 4, as shown in FIG.
At the same time, the optical displacement sensor 5 as a detection unit is supported alongside the roll and at a predetermined distance from the coil peripheral surface. As the robot printing apparatus moves in the axial direction of the coil, the roll also moves while rolling on the coil surface. When the roll rides on the hoop 6, the position of the hoop 6 can be detected because the reflection distance is different.

However, if the reflection angle differs due to the undulation or oil film present on the coil surface, or if the color of the coil surface suddenly changes, the displacement sensor erroneously measures the reflection distance and erroneously recognizes the hoop. Would be. As a displacement sensor other than the optical type, an ultrasonic sensor that is not affected by the color of the workpiece can be used to detect a change in displacement due to a reflected wave, but similarly detects the end of the oil film. In addition, there is a method of detecting vibration when the roll rides on the hoop by using a vibration type sensor, but other mechanical vibrations are also detected, and it has been found that stability is poor.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a robot printing apparatus or label which can reliably detect the position of a hoop on a coil surface without being affected by swelling of the coil surface or oil or color. It is an object of the present invention to provide a hoop detecting device in which coils are bound for an attaching device.

[0006]

In order to achieve the above object, a hoop detecting device according to the present invention is arranged such that a detecting portion is biased toward a coil surface by a floating support means via a spring. The attached auxiliary roller, a plate-shaped target attached so as to protrude from the auxiliary roller in parallel with the roller axis, and attached to the floating support means at a predetermined interval at a position facing the target. And a displacement sensor.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

FIGS. 1 and 2 are a side view and a front view, respectively, of a hoop detection device for binding a coil wound on a rope according to the present invention for a robot printing device.

The frame 10 is connected to a moving device for moving the hoop detecting section 40 along the surface of the coil 4 in the direction of the coil axis. In the present embodiment, the moving device corresponds to a robot printing device. A piston rod 23 is vertically fixed to the frame 10.
A cylinder 25 slidably fitted to the third piston 24 is supported in a floating state by springs 26 and 27 and constitutes a floating support means 20. The main roller 3 is rotatably supported by the bifurcated support member 1 on the mounting plate 28 fixed to the cylinder 25 as shown in FIG. The pressing means for pressing the main roller 3 against the coil 4 connects a connection port 25a for supplying compressed air to a lower chamber defined by a piston 24 in a cylinder 25, a compressed air source, and the like. It is constituted by a conduit.

According to the present invention, a bracket 31 extending in a plane perpendicular to the axis of the main roller 3 is mounted on the mounting plate 28, and an auxiliary roller carrying shaft 32 is slidable up and down on a free end 31a of the bracket 31. , And a fork 44 is fixed to the lower end of the support shaft 32 to rotatably support the auxiliary roller 43. The auxiliary roller 43 is located in the same plane as the main roller 3, and
It is urged toward the surface of the coil 4 by a spring 45 mounted between the lower end surface of the first free end 31a and the fork 44.

Further, according to the present invention, a plate-like target 46 is attached to the bifurcated fork 44 of the auxiliary roller 43 so as to protrude in parallel with the axis of the auxiliary roller 43, and is further fixed to the bracket 31. Bracket 38 movably mounted up and down on 37
The optical displacement sensor 5 is mounted at a position facing the target 46 at a predetermined interval. The target 46 is preferably a ceramic plate. Auxiliary roller 43, auxiliary roller carrying shaft 32, spring 45,
The target 46, the displacement sensor 5, etc.
Is configured. Note that in FIG. 1, the main roller 3 is not visible because it is located on the same plane behind the auxiliary roller 43.

FIG. 3 shows a process of processing a signal detected by the hoop detecting device configured as described above.

When the robot printing apparatus moves, the main roll 3 and the auxiliary roller 43 supported by the floating support means 20 move along the axial direction while rolling on the coil 4. The optical displacement sensor 5 constantly measures the displacement of the target 46 connected to the auxiliary roller 43. When the auxiliary roller 43 rides on the hoop 6,
The distance between the target 46 and the displacement sensor 5 changes, and outputs a current of 4 to 20 mA as shown in FIG. Displacement sensor 5
Is sent to the digital panel meter 12,
Only the largest displacement digitally converted by the panel meter 12 is digitally output and sent to the computer 13 as a hoop presence signal. The computer 13 further processes the hoop presence signal and sends it to the robot printer 14 to stop the printing operation. If the sampling data comparison mode is used, a gradual change on the coil surface can be ignored, and only a large change due to the hoop can be detected. However, when this mode is used, the displacement position is always compared at a certain sampling period, so that the Low and High signals are output twice for one hoop as shown in FIG. That is, a Low output is output when the auxiliary roller is on or off the hoop, a High output is output when the auxiliary roller is on or off the hoop, a High output is output when the main roll is on or off the hoop, and a Low output is output when the main roll is on or off the hoop. For this reason, the signal to be handled is the first signal of the High signal, and a hoop detection permission is set on the computer 13 side, which does not accept the High signal for a certain traveling distance thereafter. This makes it possible to cancel the second High signal that always follows one hoop.

[0014]

According to the present invention, the detection unit is provided with an auxiliary roller attached to the floating support means so as to be urged toward the coil surface via a spring, and the detection unit projects from the auxiliary roller in parallel with the roller axis. A plate-like target attached in such a manner, and an optical displacement sensor attached to the floating support means at a position facing the target at a predetermined interval, and the displacement sensor is located at a distance between the coil surface. The distance between the target and the auxiliary roller is measured indirectly instead of directly measuring the position of the hoop on the coil without being affected by the oil film or color on the coil surface. The measurement accuracy can be improved as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a side view of a hoop detection device according to the present invention.

FIG. 2 is a front view of the hoop detection device of FIG. 1;

FIG. 3 is a diagram schematically illustrating a signal processing method when a hoop on a coil is detected using the hoop detection device of the present invention.

FIG. 4 is a diagram showing sensor signals displayed on a digital panel meter.

FIG. 5 is a diagram showing an output of a digital panel meter.

FIG. 6 is a schematic diagram of a conventional hoop detection device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 3 main roller 4 coil 5 displacement sensor 6 hoop 20 floating support means 40 detection unit 43 auxiliary roller 45 spring 46 target

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Michio Ashimura 1-1, Hibata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka Nippon Steel Corporation Yawata Works (72) Inventor Tomoya Nagashima 4 Omori Nishi, Ota-ku, Tokyo No. 17-35 Mark Tech Co., Ltd. (72) Inventor Yukio Hirasawa 4-17-35 Omori Nishi, Ota-ku, Tokyo Inside Mark Tech Co., Ltd. (56) References JP 62-3602 (JP, A) JP-A-61-294307 (JP, A) JP-A-62-86953 (JP, U)

Claims (1)

(57) [Claims] 1. A detecting device for a hoop in which a coil wound around a rope is bound, the moving device being configured to move a detecting portion in a coil axial direction along a surface of the coil, and connected to the moving device. Floating support means, a roller supported by the floating support means, pressing means for elastically pressing the roller against the coil surface, and a detection unit arranged in parallel with the roller on the floating support means, In the hoop detection device in which the coils are bound, the detection unit includes an auxiliary roller attached to the floating support means via a spring so as to be urged toward the coil surface, and the auxiliary roller is parallel to the roller axis from the auxiliary roller. A plate-like target attached so as to protrude from the target, and a displacement sensor attached to the floating support means at a predetermined interval at a position facing the target. A hoop detection device, comprising: