JPH0220604A - Device for push-pulling by hydraulic jack - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hydraulic jack push/pull device, and is particularly suitable for simplifying the mechanism and quickly transferring a hydraulic jack to the drive side when changing one work roll. This invention relates to a hydraulic jack push/pull device.

[Conventional technology]

In the conventional device, as described in Japanese Unexamined Patent Publication No. 58-1635, the wheels attached to the hydraulic jack are fixed, so the support of the rail that guides the wheels is not connected to the lifting device from the housing post. It was a complex mechanism in which the housing was either pushed up through the housing crossbeam or suspended from the housing crossbeam through a hanging device.

First, in the conventional embodiment shown in FIGS. 5 and 6, a four-stage rolling mill has an operation side housing 1 and a drive side housing 2, and the operation side housings 1 and 2 have an upper work roll 3,
A lower work roll 4, an upper backup roll 5, a lower work roll 4, an upper backup roll 5, and a lower back roll 6 are supported so as to be pressable and rotatable.

Both ends of the upper backup roll 5 are rotatably supported by an upper operation side backup roll chock 7 and an upper drive side backup roll chock 8. At the top of the operation side housing 1 and drive side housing 2, there is a downward male screw 9. to adjust the roll gap. A female screw 10 (each not shown in cross-section) is attached. Hydraulic jacks 11 are inserted between the male reduction screw 9 and the upper operating side and upper driving side backup roll chocks 7.8, respectively.

- Each hydraulic jack 11 is equipped with wheels 12 that do not move up or down, and rails 1 guide the wheels 12 for moving the hydraulic jack 11 on both sides of the hydraulic jack 11.
3 is arranged so that the hydraulic jack 11 can be transferred. A guide surface 15 is provided inside the rail support stand 14 that supports the rail 13 to prevent the hydraulic jack 11 from rolling. A lifting cylinder 16 is provided at the bottom of the rail support 14, and is lowered during steady rolling.

A gap is formed between the wheel 12 and the rail 13.

A support stand 17 is fixedly supported by the operation side and drive side housings 1 and 2 at the lower part of the lifting cylinder 16, and supports all the weight of the hydraulic jack 11, the rail support stand 14, etc.

The hydraulic jacks 11 are connected to each other by a connecting link 18, and the drive side hydraulic jack 11 has a transfer cylinder 19.
A connecting fitting 2o is fixed.

The transfer cylinder 19 is fixed to the rail support 14 by a rotary coupling base 21. Upper backup roll 5. Moreover, the operation side and drive side backup roll chocks 7.8 are always pushed upward or pulled up by a roll balance mechanism (not shown).

The transfer cylinder 19, link 18, etc. form a means for displacing each hydraulic jack 11 toward the drive side.

During steady rolling, the rail support stand 14 is used while being placed on the shoulder of the back roll chock (not shown), a gap is provided between the wheel 12 and the rail 13, and the hydraulic jack 1
1 is guided by a guide surface 15.

In the conventional embodiment described above, in order to transfer the hydraulic jack 11 to the drive side when rearranging the upper and lower work rolls 3.4, the lowering male screw 9 is raised, and then the upper operation side and drive side backup To create a gap between the roll chock 7.8, the lifting cylinder 16 at the bottom of the rail support 14 is operated, and the rail 13 and the axle top 2 come into contact and the hydraulic jack 11 is raised. As a result, the operation of the four lifting cylinders 16 is not in sync, resulting in unreliable operability, and a mechanism for confirming the operating position is required, making the structure complex. This method has disadvantages such as requiring more time to reassemble rolls 3 and 4. Furthermore, due to these complicated structures, a great deal of effort is required for maintenance and inspection.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, when one work roll is rearranged, a complicated elevator end with a lifting cylinder is required to create a gap between the lowering male screw and the upper backup roll chock in order to transfer the hydraulic jack to the drive side. operability,
There were problems such as poor maintainability and more time spent rearranging work rolls.

The purpose of the present invention is to create a simple mechanism with good operability and maintainability in order to provide a gap between the lower male screw and the hydraulic jack between the upper backup roll chock, to shorten the time for changing work rolls, and to improve productivity. It is to raise the level.

[Means to solve the problem]

The above object is achieved by providing a rail for connecting the upper backup roll chocks between each of the upper backup roll chocks, and forming an I-structure in which the wheels attached to the hydraulic jacks guided by the rails are movable up and down.

[Effect]

The wheels attached to the hydraulic jack that can move up and down automatically create a gap between the upper back-up roll and the hydraulic jack when the lower male screw is raised when changing the work rolls. The hydraulic jack is guided by wheels on the backup roll chock, the rail between the upper backup roll chocks, and the rail installed outside the drive side housing, so that it can be moved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, and 4.

The wheel 12, which can move up and down, is supported on a support pin 29, and the support pin 29 is attached to a support rod 28, and the support rod 28 has a compression spring 31 attached to a support base 13 fixed to the hydraulic jack 11. It is positioned and supported by a nut 3o. Therefore, during rolling, the compression spring 31 is compressed by the gap Gl (shown in FIG. 4) between each upper backup roll chock 7.8 and the hydraulic jack, which is necessary for rearranging the upper and lower work rolls 3, 4. I'm here.

On the other hand, the rails 14 between the respective upper backup roll chocks 7° 8 are connected and supported by support pins 16 using the upper operating side backup roll chocks 7 and the upper drive side backup roll chocks 8 as support bases. Further, on the outside of the drive-side housing 2, a lifting rail 15 is supported by a support frame 19 on which a transfer cylinder 23 for transferring the hydraulic jack 11 is attached, one side is supported by a support pin 20, and the other side is supported by a support pin 18 to support a lifting cylinder 27. It is supported on a shaft by a tip fitting 17 so that it can be moved up and down. The lifting cylinder 27 is installed on the support frame 19, and is interlocked so that the guide surface of the wheel 12 of the main drive side backup roll chock 8 and the upper surface of the rail 15 are on the same plane.

The hydraulic jacks 11 are connected to each other by connecting links 21 via connecting pins 22, and a connecting fitting 25 of a transfer cylinder 23 is connected to the drive-side hydraulic jack 11 by a connecting pin 26. The transfer cylinder 23 is fixed to a support frame 19 installed in the drive side housing 2 by means of a rotary coupling base 24 .

With this mechanism, when changing from the rolling state shown in FIG. 3 to the transfer state of the hydraulic jack 11 shown in FIG. and the gap G1 between the hydraulic jack 11,
The gap G1 between the reduction jack 11 and each upper backup roll chock is created by stretching the compression spring 31 by a certain amount, and the transfer cylinder 23 drives the hydraulic jack 11 from the state shown in Figure 2 to the state shown in @. It can be moved to the side.

According to this embodiment, operability and maintainability are improved, and it is possible to reliably create a gap between the hydraulic jack, the lowering male screw, and the upper backup roll chock, and the hydraulic jack can be transferred to the drive side in a short time. Therefore, the time required to rearrange the work rolls can be shortened.

〔Effect of the invention〕

According to the present invention, the hydraulic jack and the male screw, and
The gap between the upper backup roll chock and the upper backup roll chock can be maintained quickly and reliably, the hydraulic jack can be quickly transferred to the drive side, and the time required for rearranging the work rolls can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIGS. 3 and 4 are side sectional views of FIG. 1, and FIG. 5 is a conventional embodiment. FIG. 6 is a plan view of FIG. 5. 7... Upper operation side backup roll chock, 8...
・Main drive side backup roll chock, 11...Hydraulic jack, 12...Wheel, 13...Support stand, 14
...Rail, 15...Rail, 21...Connection link, 23...Transfer cylinder, 28...Support rod, 29
...Support pin, 30...Nut, 31...Compression spring. Figure Figure Figure S24 /2 /3 Figure 4 Figure 6 Cause

Claims (1)

[Claims] 1. Between the reduction male screw and the upper operation side back-up roll chock and the upper drive side back-up roll chock, respectively, which are installed on the operation side and the upper part of the drive side housing of the rolling mill. In the device provided with a hydraulic jack, a hydraulic cylinder is disposed outside the drive side housing so that the hydraulic jack can be transferred to the drive side, and the upper operation side backup roll yoke and the upper drive side backup roll are connected to each other. A rail is provided between the chock and each upper back-up roll chock as a support base, and a rail is further provided outside the drive-side housing that is supported on the support base of the hydraulic cylinder and is movable up and down. and a hydraulic jack push/pull device, characterized in that the hydraulic jack is provided with wheels that are guided by the rails and are movable up and down so as to support the hydraulic jack during transportation.