JPH0910844A - Roll chock change device - Google Patents

Abstract

PURPOSE: To simultaneously take out plural rolls to outside a roll device in short time/by building in an inner roll casette capable of simultaneously hanging plural rolls while maintaining roll arrangement in operation. CONSTITUTION: At the beginning, by releasing fixing between a base and roll chock 8 of straightening machine, a hook of crane is hooked to the projecting part of an inner roll casette 9 to hang the casette 9 as it is. By this method, because the base part of shafts 10 of each roll 5 is supported with the recessed part of casette 9, each roll 5 is hung together with the casette 9 while maintaining the roll arrangement before hanging and then is simultaneously taken out from the base of straightening machine. Successively, the casette 9 is placed on a casette placing table 20 in a roll chock change means 12 together with each roll 5. Successively, a chock receiving table 13 is moved in the chock drawing out direction together with a base 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll chock exchanging device, and more particularly to a roll chock exchanging device in which the roll chock can be exchanged easily and in a short time without using a large crane.

[0002]

2. Description of the Related Art For example, as shown in FIG. 5, a steel strip 1 such as an angle steel, which is cut into a predetermined length after hot rolling, is sequentially sent to a cooling floor 2 and cooled there. In No. 1, thermal stress strain occurs due to non-uniform cooling in the cooling floor 2. Therefore, the steel strip 1 is sent through a front roller table 3 to a multi-strip straightening machine 4 in which a plurality of straightening rolls are alternately arranged in the upper and lower parts, and distortions such as bending are removed at the same time. .

In the roll chock (bearing) of the straightening machine 4,
Excessive stress acts. Therefore, it was necessary to regularly replace the roll chock. Further, when the roll is to be abraded due to wear of the roll, it is necessary to replace only the roll. Conventionally, for example, the roll chock has been replaced according to the following method. As shown in FIG. 6, a crane 6 is provided for each roll 5.
Lift and replace with. As shown in FIG. 7, the roll 5 is lifted by the crane 6 together with the roll unit 7 and replaced.

[0004]

However, the above-mentioned prior art has the following problems. In this method, since the rolls 5 are individually lifted by the crane 6 and the roll chocks 8 are manually replaced one by one, it takes time to replace the chocks. In this method, a plurality of rolls 5 can be lifted at the same time, but it takes time to lift the roll unit 7. Moreover, the roll unit 7 needs a high mechanical rigidity to receive the roll reaction force, and is therefore heavy. Therefore,
A large crane is required to lift the roll unit 7.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a roll chock exchanging device capable of exchanging roll chock easily and in a short time without using a large crane.

[0006]

[Means for Solving the Problems] According to claim 1,
A feature of the present invention is, in a roll chock exchanging device for exchanging a roll chock of a roll device having a plurality of rolls, the plurality of rolls are simultaneously treated while maintaining the roll arrangement when the roll device is incorporated in the roll device. An inner roll cassette for taking out from the roll device, and a roll chock exchange means for removing the roll chock from the plurality of rolls taken out of the roll device together with the inner roll cassette, the inner roll cassette, The roll chock exchanging means can be housed in a roll device and has a concave portion for receiving a base portion of each shaft of the plurality of rolls, and the roll chock exchanging means is provided for each of the plurality of rolls supported by the inner roll cassette. Cho on which the roll chock is placed A cradle, a height adjustable pedestal for horizontally moving the chock pedestal in the axial direction of the roll, a cushioning means provided between the chock pedestal and the pedestal, and the pedestal. And a moving means for moving in the horizontal direction.

A feature of the present invention described in claim 2 is that the buffer means is an air spring.

[0008]

[Function] If an inner roll cassette capable of simultaneously lifting a plurality of rolls while maintaining the roll arrangement during use is incorporated in the roll device, the inner roll cassette can be lifted to shorten a plurality of rolls at the same time. Can be taken out of the roll device at time. The inner roll cassette does not receive a roll reaction force unlike the roll unit, and therefore does not require high rigidity and therefore does not become heavy. Therefore, a large crane is not required to lift the inner roll cassette.

The inner roll cassette together with a plurality of rolls is hung on the inner roll cassette pedestal in the roll chock exchanging means, and the chock pedestal on which a part of the load of the roll chock is applied is moved in the roll withdrawing direction together with the gantry. If so, the chock can be easily pulled out from the roll shaft. On the other hand, in order to fit a new chock into the roll, the new chock is placed on the chock cradle and the chock cradle is moved in the direction opposite to the roll withdrawal direction. At this time, due to the cushioning action of the cushioning means provided between the gantry and the chock cradle,
Since the chock vibrates slightly, it is easy to fit the chock.

When the bearing roller holder of the roll chock is removed, the inner race remains fitted to the roll shaft side, and the bearing roller and the outer race become integral with the chock. Therefore, the chock can be pulled out from the roll shaft with a slight force.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the roll chock exchanging device of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the roll chock exchanging device of the present invention, FIG. 2 is a perspective view showing an inner roll cassette, and FIG. FIG. 4 is a side view showing the inner roll cassette incorporated in a multi-strand straightening machine for steel strips as a roll device.

In FIGS. 1 to 4, 9 is an inner roll cassette. The inner roll cassette 9 has a plurality of pairs of recesses 9A formed to face each other. Each recess 9A is formed such that when the base of the shaft 10 of each roll 5 is placed on this, the arrangement of each roll 5 is the same as the arrangement of the rolls before hoisting in the straightening machine. Therefore, by mounting the base portion of the shaft 10 of each roll 5 in the recess 9A, it is possible to take out a plurality of rolls 5 from the pedestal 4A of the straightening machine at the same time while maintaining the roll arrangement when the straightening machine 4 was incorporated. It will be possible. The inner roll cassette 9 has a protrusion 11 so that it can be easily lifted up integrally with the roll 5 from the pedestal 4A of the straightener by a crane (not shown).

Numeral 12 is a roll chock exchange means,
The roll chock 8 is removed from each roll 5 taken out from the pedestal 4A of the straightening machine together with the inner roll cassette 9. The roll chock exchanging means 12 includes a chock cradle 13 on which the roll chock 8 of each roll 5 supported by the inner roll cassette 9 is placed, and a horizontally moving chock cradle 13 in the axial direction of the roll 5, for example, A mount 15 whose height can be adjusted by a screw jack 14, a chock support 13 and a mount 1.
5, for moving the pedestal 15 in a horizontal direction, and a cushioning means 16 composed of, for example, an air spring,
For example, the moving means 17 is composed of a hydraulic cylinder, and a plurality of pairs of these are provided on the base 18 so as to face each other at intervals. The pedestal 15 is
It horizontally moves along a slide base 19 provided on the base 18.

According to the roll chock exchanging device of the present invention having such a configuration, the roll chock is exchanged as follows. First, the straightening machine stand 4A
Release the fixation of the roll chock 8 and. Then, the hook of the crane is hooked on the protrusion 11 of the inner roll cassette 9, and the inner roll cassette 9 is lifted as it is. As a result, the base of the shaft 10 of each roll 5 is supported by the recess 9A of the inner roll cassette 9, so that each roll 5 is hoisted together with the inner roll cassette 9 while maintaining the roll arrangement before hoisting and straightening. It is simultaneously removed from the machine base 4A.

Next, the inner roll cassette 9 is placed together with the rolls 5 on the inner roll cassette holder 20 in the roll chock exchanging means 12. At this time, most of the load of the roll 5 is applied to the inner roll cassette 9, but some load is applied to the chock cradle 13 by the reaction force of the buffer means 16. That is, the height of the chock cradle 13 is adjusted by the screw jack 14 so that a slight load is applied to the chock cradle 13. Next, the moving means 17 moves the chock cradle 13 together with the gantry 15 in the chock extraction direction. As a result, the roll chock 8 on the chock cradle 13 is pulled out from the roll shaft 10.

On the other hand, in order to fit the roll chock 8 into the roll shaft 10, the roll chock 8 is placed on the chock cradle 13 which is separated from the roll shaft 10, and the moving means 17 is used.
The chock cradle 13 is moved in the opposite direction to that when fitted. In this case, since the buffer means 16 vibrates slightly,
The roll chock 8 can be fitted easily. Pulling out and fitting each roll chock 8 at the same time,
Alternatively, it may be performed with a time difference.

In this way, all roll chocks 8
When the fitting is completed, the inner roll cassette 9 is lifted together with the rolls 5 by a crane and incorporated into the pedestal 4A of the straightener. Then, the pedestal 4A and the roll chock 8 are fixed. This completes the replacement of the roll chock 8.

[0019]

As described above, according to the present invention, the following useful effects are brought about. If an inner roll cassette that can simultaneously lift multiple rolls while maintaining the roll arrangement during use is built into the roll device, by lifting the inner roll cassette, multiple rolls can be rolled simultaneously in a short time. It can be taken out of the device. The inner roll cassette does not receive a roll reaction force unlike the roll unit, and therefore does not require high rigidity and therefore does not become heavy. Therefore, a large crane is not required to lift the inner roll cassette. If you hang the inner roll cassette with multiple rolls on the inner roll cassette pedestal in the roll chock exchanging means, and move the chock pedestal with a part of the load of the roll chock in the roll extraction direction together with the gantry, The chock can be easily pulled out from the roll shaft. To fit a new chock into the roll, place the new chock on the chock cradle and move the chock cradle in the direction opposite to the roll withdrawal direction. Since the chock vibrates slightly due to the buffering action of the buffering means provided between them,
The chock can be fitted easily.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a roll chock changing device of the present invention.

FIG. 2 is a perspective view showing an inner roll cassette.

FIG. 3 is a front view in which a roll shaft section of an inner roll cassette incorporated in a multi-strand straightening machine for strip steel as a roll device is shown in section.

FIG. 4 is a side view showing an inner roll cassette incorporated in a straightening machine as a roll device.

FIG. 5 is a schematic plan view showing a process in which the steel strip is conveyed to a straightening machine.

FIG. 6 is an explanatory view showing a conventional roll chock replacement method.

FIG. 7 is an explanatory view showing another conventional roll chock replacement method.

[Explanation of symbols]

 1: Steel bar 2: Cooling floor 3: Front roller table 4: Straightening machine 4A: Stand 5: Roll 6: Crane 7: Roll unit 8: Roll chock 9: Inner roll cassette 9A: Recess 10: Shaft 11: Protrusion 12: Roll chock replacement Means 13: Chock cradle 14: Screw jack 15: Frame 16: Buffer means 17: Moving means 18: Base 19: Slide base 20: Inner roll cassette stand

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shigeo Mitsui 7 Minamihama, Kamisu-cho, Kashima-gun, Ibaraki Prefecture Toa Steel Co., Ltd. Kashima Plant (72) Inoue Souji 7 Minamihama, Kamisu-cho, Kashima-gun, Ibaraki Prefecture Ban Tor Steel Co., Ltd. Kashima Factory

Claims (2)

[Claims] 1. A roll chock exchanging device for exchanging a roll chock of a roll device having a plurality of rolls, wherein the plurality of rolls are simultaneously rolled with the roll arrangement maintained when the roll device is incorporated in the roll device. An inner roll cassette for taking out from the device, and a roll chock exchanging means for removing the roll chock from the plurality of rolls taken out of the roll device together with the inner roll cassette, the inner roll cassette is the roll. The roll chock exchanging means, which can be housed in the apparatus and has a recess for receiving the base of the shaft of each of the plurality of rolls, and the roll chock exchanging means is a roll chock of each of the plurality of rolls supported by the inner roll cassette. Chock on which is placed A pedestal, a pedestal whose height can be adjusted to horizontally move the chock pedestal in the axial direction of the roll, a cushioning unit provided between the chock pedestal and the pedestal, and the pedestal to be horizontal. A roll chock exchanging device comprising a moving means for moving the roll chock in a predetermined direction. 2. The roll chock exchanging device according to claim 1, wherein the buffering means is an air spring.