JPS62157165A - Metal strip traveling direction converting device - Google Patents

Abstract

PURPOSE:To permit a metal strip to convert its traveling direction reliably without contact, by providing a traveling passage of a metal strip drawn from a molten zinc plating bath with a sensor for sensing meandering of a metal strip and attitude control means for a traveling direction converting body. CONSTITUTION:There is provided a traveling direction converting body 7 for converting the traveling direction of a metal strip without contact by jetting gas at the position where the traveling direction of the metal strip 1 is to be converted 90 deg. and a sensors 8, 9 for sensing meandering of the metal strip 1 are disposed at a traveling passage of the metal strip 1. The traveling direction converting body 7 comprises a hollow body having an arc-shaped guide surface 10 and is provided with a attitude control means A. That is, the traveling direction converting body 7 has its lower center axially mounted on a base 14 by a horizontal axis 13 and has its opposite sides axially mounted at the extreme end of a rod 15a of a liquid pressure cylinder 15. As a result,the traveling direction converting body 7 can control its attitude by the operation of the cylinder 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a moving direction changing device for a metal strip for changing the direction of a moving metal strip in a non-contact manner.

[Prior art and its problems]

For example, hot-dip galvanizing a metal strip can be carried out by passing the metal strip through a chute 3 into a hot-dip galvanizing bath 2 containing a hot-dip galvanizing bath, as shown in a schematic vertical section in FIG. 1 is introduced, the course of the IJ sprocket 1 is reversed upward by the zinc roll 4 provided in the high-dip galvanizing tank 2, and 1
This is carried out by passing through a pair of pinch rolls 5, pulling it out above the hot-dip galvanizing tank 2, changing the moving direction horizontally with a totsuzo roll 6, and performing cooling, chromate treatment, etc.

In the above two steps, the direction of the moving metal strip 1 is set above the hot-dip galvanizing tank 2, and the top roll 6 is used to convert the metal strip 1 into the surface of the metal strip 1. There is a problem in that the plating layer in an unsolidified state peels off due to contact with the top roll 6.

As a device for solving the above-mentioned problem, a moving direction changing body having a gas injection port provided on its upper surface is known. According to this movement direction changing body, the metal strip is floated by the gas injected toward the metal strip from the gas injection hole, and the movement direction of the metal strip can be changed in a non-contact state.

However, the above-mentioned non-contact moving direction changing body,
Compared to a contact type converter such as a top roll, the frictional force between the metal strip and the direction to be changed is extremely high.
J. Sai. Therefore, when a meandering occurs in the moving metal strip, the correction force is weak, and the metal strip comes off the direction changing body, resulting in a problem that operation becomes impossible.

[Purpose of the invention]

Therefore, an object of the present invention is to change the direction of a moving metal strip without contact, and to correct the meandering even if the metal strip meanders, so that the metal strip does not come off and can be accurately changed. An object of the present invention is to provide a moving direction changing device for a metal strip that can change its moving direction.

[Summary of the invention]

The present invention provides a movement direction changing body for non-contactly changing the moving direction of a metal strip moving along the arcuate guide surface, which has a gas injection port at the periphery of the arcuate guide surface formed on the surface thereof. and, with respect to the moving direction of the metal strip, the metal strip is provided in the movement path of the metal post lip on the upstream side of the movement direction changer so as to sandwich the IJ knob from both sides thereof. a sensor for detecting the meandering of the metal strip; and the movement for controlling the attitude of the moving direction changing body so as to correct the meandering according to the meandering state of the metal strip detected by the sensor. It is characterized in that it consists of an attitude control means provided on the direction changing body.

[Structure of the invention]

Next, the apparatus of the present invention will be described with reference to FIG. 7'. FIG. 1 is a schematic plan view showing a first embodiment of the apparatus of the present invention, and FIG. 2 is a schematic side view.

As shown in the drawing, the moving direction of the metal strip l is 90
At the position to be changed, a movement direction changer 7 is provided to change the direction of movement of the IJ tube without contact with the metal strip 1 by injecting gas. A pair of sensors 8 and 9 for detecting the meandering of the metal strip 1 is arranged in the movement path of the metal strip 0 on the upstream side of the movement direction changer 7 so as to sandwich the metal strip 1 from both ends thereof. has been done.

As shown in FIG. 3 in a schematic side view, FIG. 4 in a schematic front view, and FIG. 5 in a schematic sectional view taken along line a-a in FIG. l) Consists of a hollow body with a circular guide surface 1° curved at an angle of 90° facing the knob 1.

The arcuate guide surface 10 has a peripheral edge 11 that protrudes from the guide surface 1o, and along the peripheral edge 11, frame-shaped gas injection holes 12 are provided that are inclined inward.

The movement direction changing body 7 configured as described above includes a sixth
Attitude control means A as shown in a schematic front view in the figure is provided. That is, the moving direction changing body 7 has its lower surface centrally fixed to a base 14 by a horizontal shaft 13, and both sides of its lower surface are connected to a hydraulic cylinder 1 provided on the base 14.
5.15 is pivotally attached to the tip of each rod 15a. The displacement redirection body 7 is therefore connected to the hydraulic cylinder 15.1
5, it is possible to tilt the shaft 13 as a fulcrum and control its posture.

The gas blown into the movement direction changing body 7 through the air supply pipe 16 passes through the frame-shaped gas injection holes 12 provided on the peripheral edge 11 of the arc-shaped guide surface 10 and then passes through the metal sl-IJ tube 7. °
Towards 1, it erupts. As a result, the metal IJ tube 1 moves along the arc-shaped guide surface 10 without contacting the arc-shaped guide surface 10, and its moving direction is changed.

At this time, since the arcuate guide surface 10 is recessed inward from its periphery 11, the buffering effect of the gas injected from the gas injection hole 12 creates a gap between the moving direction changing body 7 and the metal strip l. The gap between them is steadily filled.

When the metal stop IJ knob 1 snakes toward one of the sensor 8 sides shown in FIG. The moving direction changing body 7 is tilted about the shaft 13 so that the gap between the arcuate guide surface 1o and one sensor 8 side of the metal strip 1 is small, and the gap between the other sensor 9 side is large. As a result, metal parts) IJ knob 1
The meandering is corrected, and the direction of movement of the IJ tube 1 can be reliably changed by 90 degrees along the arcuate guide surface 10 of the movement direction changer 7.

In addition to the above-mentioned tilting mechanism, as a means for controlling the attitude of the moving direction changing body 7, as shown in a schematic plan view in FIG. 7 and 7 may also be a mechanism that rotates in the left and right directions on the same plane, centering on point X on the upstream side. That is, when the metal strip 1 snakes toward one of the sensors 8, the movement direction changing body 7 is rotated in the direction of arrow A, and
l) When the knob 1 meanders towards the other sensor 9 side, the movement direction changing body 7 (metallic) can correct the meandering of the IJ knob 1 by rotating it in the direction of the arrow (f). can.

FIG. 8 is a schematic front view showing a second embodiment of the apparatus of the present invention, and FIG. 9 is a schematic side view. At the position where the moving direction of the metal strip 180 is to be changed, a moving direction changing body 7' is provided for changing the moving direction of the metal strip 180 in a non-contact manner by jetting gas. With respect to the direction of movement of the metal strip, a metal strip (IJ
Similar to the device of the first embodiment, a pair of sensors 8 and 9 for detecting meandering of the metal IJ knob 1 are arranged so as to sandwich the knob 1 from both ends thereof.

The moving direction changing body 7' is shown in FIG. 10 as a schematic 6111 side view, FIG. 11 as a schematic front view, and FIG. 12 as shown in FIG.
As shown in FIG. 13 in a sectional view taken along line b, and as shown in a sectional view taken along line c-c in FIG. It has become. The peripheral edge 11' of the arcuate guide surface 10' includes
A frame-shaped gas injection hole 12' is provided along the peripheral edge 11'.

As shown in FIG. 6, the movement direction changing body 7' configured as described above is pivoted at the center of its lower surface to the base 14 by the horizontal shaft 13, and both sides of the lower surface are attached to the base 14. The hydraulic cylinder 15.15 provided in the hydraulic cylinder 14 is pivotally attached to the tip of each rod 15a, and
During operation, the shaft 13 can be tilted as a full fulcrum.

When the metal strip 1 snakes toward one sensor 8 side shown in FIG. 8 and the sensor 8 detects this, the hydraulic cylinder 15.15 is actuated by the signal and moves in the direction shown by the arrow C in FIG. That is, the gap between the arcuate guide surface 10' of the moving direction changing body 7' and the sensor 8 side of the IJ knob 1 is /J.larger, and the gap with the other sensor 9 side is larger. Then, the moving direction changing body 7' is tilted. As a result, the meandering of the metal strip (IJ) l is corrected, and the moving direction of the metal strip (fl) can be reliably changed by 180° along the arcuate guide 10' surface of the moving direction changing body 7'. Next, the apparatus of the present invention will be explained by way of an example.

A steel strip with a width of 1220 m6, which has been pulled out from a hot-dip galvanizing bath and has a hot-dip galvanizing bath attached to its surface, is subjected to a 180-degree turn in its direction of movement using the apparatus of the present invention shown in FIGS. 8 to 13. I let it happen.

The specifications of the moving direction changing body 10' shown in FIGS. 12 and 13 are as follows.

W: 90Qwb, L: 1400Wi.

H: 15 visits, T: 1 gift.

θ, 30° Injection air flow rate: 3,000 Nm'/H2 Sensors for detecting meandering of the steel strip were placed 33 mg from both ends of the steel strip. A photodiode was used as a sensor.

As a result, the meandering that occurred in the metal strip was corrected by the moving direction changer, and the moving direction of the steel strip could be reliably changed 180 degrees without contact with the moving direction changer 10'.

〔Effect of the invention〕

As described above, according to the present invention, the direction of the moving metal strip can be changed even if the metal strip meanders.
An industrially immersed effect is produced that can be reliably converted without contact.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing a first embodiment of the device of the present invention, FIG. 2 is a schematic side view, FIG. 3 is a schematic side view of a moving direction changer used in the device of the present invention, and FIG. The figure is a schematic front view, FIG. 5 is a schematic sectional view taken along line a-a in FIG. 4, FIG. 6 is a schematic front view showing the tilting mechanism of the moving direction changing body, and FIG. 8 is a schematic front view showing the second embodiment of the device of the present invention, FIG. 9 is a schematic side view, and FIG. 10 is a schematic plan view of the moving direction changing body used in the device of the present invention. A schematic side view, FIG. 11 is a schematic front view,
Figure 12 is a cross-sectional view taken along line b-b in Figure 10, and Figure 13 is a cross-sectional view of Figure 1.
1 is a sectional view taken along line CC in FIG. 1, and FIG. 14 is a schematic vertical sectional view showing an example of a hot-dip galvanizing apparatus. In the drawings: 1...Metal strip, 2...Hot dip galvanizing tank, 3...Chute, 4...Zinchlor, 5...
...Pinch roll, 6...Top roll, 7.7
'...Movement direction changing body, 8, 9... Sensor, 10.
10'...Circular guide surface, t i , t i'... Periphery, l 2 ,
l 2'... Gas injection hole, 13... Axis,
14... Base, 15... Hydraulic cylinder, 16...
Air supply pipe.

Claims (1)

[Claims] a moving direction changer for changing the moving direction of a metal strip moving along the arcuate guide surface in a non-contact manner, the member having a gas injection port at the periphery of an arcuate guide surface formed on the surface thereof; a sensor for detecting meandering of the metal strip, which is provided in a movement path of the metal strip upstream of the movement direction changing body with respect to the movement direction of the strip so as to sandwich the metal strip from both ends; Attitude control means provided on the moving direction changing body for controlling the attitude of the moving direction changing body so as to correct the meandering according to the meandering state of the metal strip detected by the sensor. A device for changing the direction of movement of a metal strip.