JPS6217472Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a threading roll for a belt-shaped body,
For example, it is an object of the present invention to provide a roll that can effectively prevent squeezing and meandering of steel bodies and the like.

The threading rolls used in heat treatment equipment such as continuous annealing furnaces are usually provided with a specific crown so that the steel strip can be threaded smoothly. Generally, this crown is convex to prevent meandering of the steel strip, and as shown in FIG. Therefore, the centering action of the steel strip 2 is performed. However, the effect of such a crown in preventing steel strip meandering is greatly influenced by various conditions such as the material, shape, size, and other line conditions of the steel strip. For example, steel strip shapes include a medium elongated shape where the widthwise center of the steel strip is elongated, an elongated shape where the widthwise ends are elongated, or a partially elongated pocket shape. In the case of a corrugated steel sheet, the end of the steel strip 2 does not come into contact with the roll 1a, as shown in FIG. Further, although such a centering action is effective in preventing meandering, in the case of a thin steel strip or the like, the stress causes the center portion in the width direction to buckle and cause aperture to occur. Therefore, for such thin steel plates, etc., it is preferable to use a roll 1c with a concave crown that exerts stress in the direction of the edge of the steel strip, as shown in FIG. If the stress balance in the width direction is lost due to this, the steel strip will pass through the steel strip in a biased state to one side, and will eventually roll out and break. Conventionally, it has been virtually difficult to obtain a crown shape that allows the steel strip to pass smoothly under all conditions, such as the various shapes of the steel strip. The reality is that we have no choice but to make improvements to some extent.

The present invention was devised in view of the above-mentioned conventional problems, and aims to suit various line conditions such as the shape of the steel strip and to smoothly thread the steel strip without meandering, squeezing, etc. The purpose is to provide a threading roll that can

For this reason, the present invention consists of one threading roll consisting of a plurality of rolls with different roll crowns, these rolls are supported by a roll support, and are rotatable in the threading direction via the roll support. According to the line conditions such as the steel strip shape, the above-mentioned plurality of rolls are rotated in the threading direction and their positions are displaced, thereby making the steel strip for the plurality of rolls with different roll crowns. The contact state of the plate is changed and the stress acting on the plate is arbitrarily adjusted to ensure smooth threading.

An embodiment of the present invention shown in the drawings will be explained below. Figures 1 and 2 show the case where the roll of the present invention is applied to the upper passing roll of a continuous annealing furnace, and 3 shows the furnace wall. shows. First 4a, 4b
These are the rolls constituting the threading roll A of the present invention, and in this embodiment, the roll 4a has a convex crown, and the roll 4b has a concave crown. These rolls 4a, 4b are rotatably supported in parallel on a roll support 5, and the roll support 5 is rotatably attached to the furnace wall 3 via a shaft 6, so that the upper part of the furnace It is arranged so as to be rotatable in the direction of steel strip threading (in the direction of the arrow in the figure), and can be held at any position rotated in this way. As a structure for such rotation and holding, for example, a piston rod of a cylinder device (not shown) disposed outside the furnace is connected to the roll support 5 through the furnace wall 3, and this cylinder device Roll support 5 and rolls 4a, 4b
An appropriate structure may be adopted, such as rotating and holding the shaft 6, or rotating the shaft 6 by transmitting power from a drive motor (not shown) to the shaft 6.

Further, in this embodiment, the sheet passing roll A is formed by a pair of rolls 4a and 4b each having a convex and concave roll crown.
However, the present invention is not limited to this, and is not limited to combining rolls with the same convex or concave shape but with different amounts of crown, or even combining three or more rolls with different crown shapes and amounts. is also possible. The present invention is also applicable to lower threading rolls, plating equipment and other steel strip threading rolls, and not only to steel strip threading rolls, but also to threading rolls for plastic, paper, and other strip-shaped bodies.

The threading roll A having the above structure is rotated and held in an appropriate state depending on the shape of the steel strip, etc., and good contact with the steel strip is ensured. That is, for example, in the case of a steel strip that is prone to meandering, in order to effectively utilize the centering action of the roll 4a having a convex crown, the threading roll A is rotated in the right direction of the arrow in FIG. If the contact length and contact strength between the steel strip 2 and the roll 4a are greater than those between the steel strip 2 and the roll 4b, and if the steel strip 2 has a relatively thin wall that tends to cause drawing, the drawing prevention at the roll 4b can be avoided. In order to make effective use of this effect, the threading roll A is rotated in the left direction of the arrow to increase the contact length and strength with the roll 4b. By doing so, smooth sheet threading is possible according to the line conditions.
In addition, even if the rolls 4a and 4b both have convex or concave crowns, or if the threading roll is composed of three or more rolls, operations similar to the above may be performed depending on each line condition. It will be done.

In practice, it is preferable to provide a sensor capable of detecting the shape of the steel strip on the front surface of the threading roll A, and to control the rotational position of the threading roll A based on the shape detection by this sensor.

According to the threading roll of the present invention as described above, a plurality of rolls with different roll crowns are made into a set to constitute one threading roll, and by displacing this as appropriate, the contact state of the strip with respect to each roll can be adjusted. can be changed arbitrarily, so it is possible to select a good contact state with the belt according to the conditions of the belt-shaped transport line, such as the shape of the belt, and this prevents constriction or meandering. This has the advantage that smooth sheet threading can be performed.

[Brief explanation of the drawing]

1 and 2 schematically show an embodiment of the present invention.
The figure is an explanatory diagram showing a plane. FIGS. 3A to 3D are explanatory diagrams showing a conventional sheet passing roll and the sheet passing state thereof. In the figure, 4a and 4b are rolls, 5 is a roll support, and A is a threading roll.

Claims (1)

[Scope of utility model registration request] A threading roll for a strip-shaped body, which has a plurality of rolls having different roll crowns supported on a roll support, and these rolls are arranged so as to be rotatable in the threading direction via the roll support.