JPH065709U - End-face aligning device for steel strip in cooling floor - Google Patents

Abstract

(57) [Abstract] [Purpose] The positioning stopper is provided with a shock absorbing mechanism that absorbs the impact at the time of collision of bar steel, and a sensor that detects runaway materials is provided to prevent bending when the end faces are aligned. [Structure] A holder 10 in which a positioning stopper 5 is rotatable around an axis orthogonal to the axial feed direction of the bar steel.
A stopper 8 which can be brought into contact with the front end surface of the bar steel attached to the holder, and the holder 8 which is pressed and urged against the holder to fix the rotation of the holder and has a rotational force of a predetermined force or more. An end face aligning device comprising a clamp (11) for allowing the holder to rotate when applied to and a runaway material detection sensor (13) for detecting the rotation of the holder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for aligning the end faces of a steel strip in a cooling floor applied to the cooling floor in a steel strip rolling line.

[0002]

[Prior art]

 The above-described strip rolling line is roughly configured as shown in FIG. 5, for example, and is rolled by a strip rolling mill (not shown) and then cut by a split shear 31 to a predetermined length (both ends cut off portion + integral multiple of standard length). The formed bar 21 is sent to the cooling floor 20 via the transfer device 32.

In the cooling floor 20, first, at the portion a in the figure, while the rolled-in steel 21 that has been carried in is cooled, it laterally feeds at a constant pitch (feeding in a direction perpendicular to the axial direction of the steel strip) and feeds to the portion b. , Here, after feeding the steel strip 21 in the axial direction to align the left end face in the figure, a group of the steel strip 21 is formed by the accumulating device 33 at the c portion. For example, 5 strips form one group, and the steel strip 21 is grouped. They are transferred to the transport device 34 in units.

Further, a plurality of the steel strips 21 on the transport device 34 are transported in parallel in group units, cut to a fixed length by the cold shear 35, and then transported in an aligned state.

Then, when the bar steel 21 is fed in the axial direction in order to align the end faces at the portion b, and when the end face of the bar steel 21 comes into contact with the scraper, the sensor detects this and the axial feed roller. A deceleration sensor that slows down the feed rate of the bar 21 and a stop sensor that detects when the end face of the bar 21 comes into contact with the scraper and brakes the axial feed roller to stop the bar 21. The pressing roller that presses the leading end of the steel strip 21 so that the sensor securely detects the end face of the steel strip 21 and the sensor detects this, and the positioning stopper for increasing the stop position accuracy in the figure. It is used for parts (see Japanese Utility Model Laid-Open No. 63-14550 No. 6). That is, the bar 21 sent in the axial direction is detected by the deceleration sensor to decelerate the rotation of the axial feed roller, and the bar 21 sent in the axial direction is detected by the stop sensor to detect the axial feed roller. Stop the rotation of and align the end faces accurately with the positioning stopper.

[0006]

[Problems to be solved by the device]

 Normally, a rolling line produces a wide variety of steel strips, ranging from thin (diameter about 12 mm) to thick (diameter about 100 mm). Therefore, if you apply force to the pressing roller to press the thick material, the thin material can overcome the force of the pressing roller. However, the feed in the axial direction may stop, and conversely, if the pressing roller force is mainly for small objects, curved thick objects will not be pressed. Therefore, the end face of the steel strip may not come into contact with the scraper securely, the deceleration sensor and the stop sensor may not operate, and the steel strip may run away and collide with the positioning stopper.

It is almost impossible to operate the deceleration sensor and the stop sensor by bringing them into contact with the railing plate in all of the tens of thousands of steel strips that pass a day and in a state where the tip shape is bad. The bar steel (runaway material) that has runaway due to the malfunction of the stop sensor collides with the positioning stopper and stops, but the buffer mechanism of the positioning stopper has various types from the above-mentioned thin to thick ones, so it is appropriate for each size. However, there is a problem that a full-length bend occurs instantly in a small object. Moreover, when a bend occurs, there is a problem that the process is stopped.

The present invention has been made in order to solve the above-mentioned problems, and the positioning stopper is provided with a buffer mechanism for absorbing the impact at the time of collision of the bar steel, and further provided with a sensor for detecting the runaway material, whereby the bending is prevented. It is an object of the present invention to provide an end face aligning device for bar steel that does not generate

[0009]

[Means for Solving the Problems]

 The present invention is equipped with a cooling floor that cools the rolled steel strip that has been appropriately divided into lengths after it is rolled, and feeds the rolled steel rod in the axial direction to bring its end face into contact with a positioning stopper to align the end faces. In the aligning device, a positioning stopper is a holder that is rotatable about an axis orthogonal to the axial feed direction of the steel strip, and a stopper that is attached to the holder and is capable of contacting the tip surface of the steel strip. A clamp for pressing the holder to fix the rotation of the holder and allowing the holder to rotate when a rotational force of a predetermined force or more is applied to the holder, and detecting the rotation of the holder. It is an end face aligning device for steel strip in a cooling floor, which is composed of a runaway material detection sensor.

[0010]

[Action]

 The positioning stopper of the present invention will be described below. The positioning stopper of the present invention is attached to the girder by extending the girder material which is supported in a cantilever state by a pillar standing above the tip of the end face alignment position.

This positioning stopper acts as a conventional positioning stopper in stable end face alignment work, and when the runaway material collides with the stopper, the stopper is opened and the runaway material detection sensor detects the runaway material. And brake the axial feed roller.

That is, in the stable end face aligning work, the bar that has been sent in the axial direction immediately before the stop is received by the stopper. When the runaway material collides with the stopper, it rotates away from the clamp urged by the holder to open the stopper to release the impact of the collision, and at this time, the striker attached to the holder comes close. It activates the runaway material detection sensor consisting of a switch and sends a stop signal to the drive mechanism of the axial feed roller to brake the axial feed roller.

When the bar steel after the end face alignment is laterally fed and when the end face alignment target external material is fed in the axial direction, the positioning stopper is raised by the elevating mechanism and retracted above the entry path of the bar steel.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show an apparatus for aligning steel strip end faces in a cooling floor according to the present invention, and FIG. 4 is an overall view showing the installation state of the above apparatus.

The end face aligning device for the steel strip in the cooling floor is similar to the conventional device in that the end face aligning position of the cooling floor 20 shown in FIG. 5, that is, the d portion and the linear portion in the axial direction of the steel strip passing therethrough (one point in the figure) It is installed in a chain line e).

First, the installation state of the apparatus will be described. The axial feed roll 1 shown in FIG. 4 is a grooved roll and is provided between the fixed rake 26 and the movable rake 27 of the cooling floor 20 along the alternate long and short dash line e of FIG. . The deceleration sensor 2 and the stop sensor 3 are installed below the entry height of the steel strip, and at a position where the steel strip 21 pushes down the contact plate 28 of both sensors. The pressing roller 4 is attached to this girder by extending a girder member 23 supported in a cantilever state by a column 22 standing upright on the tip of the end face alignment position. That is, the pressing roller 4 is rotatably supported by the pressing holder 24 in a swingable state via the suspension portion 25, and is provided on the steel strip entry path between the deceleration sensor 2 and the stop sensor 3. . The positioning stopper 5 is attached to the girder 23 via an ascending / descending mechanism having an air cylinder 7 on the opposite side of the deceleration sensor 2 from the stop sensor 3 on the axis of the end face alignment.

Next, the function of this apparatus will be described. The steel bar 21 fed to the cooling floor 20 is laterally fed at a constant pitch in the portion a in the figure and fed to the portion b, where it is fed by the axial feed roll 1 in the direction d. Then, the end surface of the steel strip 21 comes into contact with the rail plate 28 of the deceleration sensor 2 to activate the deceleration sensor 2, and sends a deceleration signal to the drive mechanism of the axial feed roll 1 to decelerate the feed speed of the steel strip 21. The further decelerated strip 21 is fed in the axial direction while being pressed by the pressing roller 4, and the end face of the strip 21 comes into contact with the scraper 28 of the stop sensor 3 to activate the stop sensor 3 to drive the axial feed roll 1. A stop signal is sent to the mechanism to stop the feed roll 1 in the axial direction, and the positioning stopper 5 accurately aligns the end faces.

As shown in FIG. 1, the positioning stopper 5 receives the steel strip 21 immediately before the stop sent in the axial direction by the stopper 8 in a stable end face alignment work, and urges the stopper 8 against this impact. It is absorbed by the spring cushion 9. Other shock absorbers may be used for the spring cushion 9 or may not be provided.

When the runaway material collides with the stopper 8, as shown in FIG. 2, the holder 10 is rotated away from the clamp 11 that presses and urges the holder 10 with a spring to open the stopper 8. As a result, the striker 12 attached to the holder 10 activates the runaway material detection sensor 13 composed of a proximity switch and the air cylinder 7 is activated, as shown in FIG. Then, raise the positioning stopper 5. At the same time, the axial feed roller 1 is braked.

In the present embodiment, the axial feed roller 1 is braked by the operation of the runaway material detection sensor 13, but such a configuration is not always necessary. That is, an alarm may be displayed by the operation of the runaway material detection sensor, or a mechanical stopper may be applied to the bar.

Further, when the runaway material collides with the stopper 8, the holder 10 is rotated as shown in FIG. 2. Therefore, before the next end face alignment work, the stopper 8 is restored to its original position. There must be. Therefore, as shown in FIG. 3, the holder 10 is lifted to the restoration stopper 14 by the air cylinder 7, the holder 10 is rotated in the reverse direction to the original position, and the holder 11 is biased and fixed to restore the original position. . With this restoring mechanism, the positioning stopper 5 can be automatically restored after the runaway material is detected, which can contribute more to the automation of the line.

Further, when the bar steel 21 after end face alignment is laterally fed and when the end face alignment target external material is fed in the axial direction, the positioning stopper 5 is raised by the air cylinder 7 of the elevating mechanism to move above the bar steel entry path. Evacuate.

Since the bar steel 21 is stopped with a slight time delay due to the operation of the stop sensor 3, a positioning stopper 5 is provided near this stop point so that the bar steel 21 can be stopped completely and surely. is there.

The fixed stopper 6 is fixed to the outermost side on the extension line of the steel strip approach path, and is sent in the axial direction even if the deceleration sensor 2, the stop sensor 3 and the positioning stopper 5 are all defective in operation. It is a backup means for stopping the steel strip 21.

[0025]

[Effect of device]

 According to the present invention, the end face aligning device of the present invention is provided with the positioning stopper, which is provided with the buffer mechanism for absorbing the impact when the bar steel collides with the stopper, and the runaway material detection sensor for detecting the runaway material. It can handle a wide variety of steel bars, from thin to thick, and even when aligning the end faces of small objects, there is no bending at all due to collision with the stopper. Even if the bar steel cannot be brought into contact with the shroud and the deceleration sensor and stop sensor cannot be activated due to insufficient pressing roller force or defective shape of the bar steel strip, the runaway bar (runaway bar) is detected. The sensor can detect and brake the axial feed roller to avoid collision with the fixed stopper. Therefore, it is possible to prevent the full-length bending and the process stoppage that have occurred in the conventional positioning stopper. Of course, the stopping accuracy of the conventional technique can be maintained.

[Brief description of drawings]

FIG. 1 is a diagram showing a positioning stopper in a normal state.

FIG. 2 is a diagram showing a positioning stopper when a runaway material is detected.

FIG. 3 is a diagram showing a positioning stopper when the holder position is restored.

FIG. 4 is an overall view showing an installed state of an end surface aligning device.

FIG. 5 is an explanatory diagram of a steel strip rolling line to which an end surface aligning device is applied.

[Explanation of symbols]

1 ... Axial feed roller, 2 ... Deceleration sensor, 3 ... Stop sensor, 4 ... Pressing roller, 5 ... Positioning stopper, 6 ... Fixed stopper, 7 ... Air cylinder, 8 ... Stopper, 9 ... Spring cushion, 10 ... Holder, 11 ... Clamp, 12 ...
Striker, 13 ... Runaway material detection sensor, 14 ... Restoration stopper, 20 ... Cooling floor, 21 ... Steel bar, 22 ... Struts, 23 ... Girder material, 24 ...
Holding roll holder, 25 ... Suspension part, 26 ... Fixed rake, 27
... Movable rake, 28 ... Sticker, 31 ... Division shear, 32 ... Conveyor, 33 ... Accumulator, 34 ... Conveyor, 35 ... Cold shear.

Claims (1)

[Scope of utility model registration request] 1. A rolled steel bar provided for a cooling floor for laterally cooling a rolled steel strip, which is divided into appropriate lengths after rolling, and axially feeding the rolled steel strip to bring its end face into contact with a positioning stopper to align the end faces. In the end face aligning device, a positioning stopper is a holder that is rotatable about an axis orthogonal to the axial feed direction of the bar steel, and a stopper that is attached to the holder and is capable of contacting the tip surface of the bar steel. , A clamp for pressing the holder to fix the rotation of the holder and allowing the holder to rotate when a rotational force of a predetermined force or more is applied to the holder, and detecting the rotation of the holder And an end face aligning device for a steel strip in a cooling floor, which comprises a runaway material detection sensor.