JPH028562Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a floor plate of a rolling mill.

There are two ways to change the rolls of rolling equipment, such as replacing only the roll assembly and replacing the entire rolling mill. However, in each method, a roll stand assembly is used to remove the rolls horizontally from the line when changing the rolls. In many cases, replacement rails and the like are installed at a location lower than the working floor, and in this case, the roll assembly, etc. cannot be removed horizontally unless the floor plate used as the working floor during the rolling operation is removed. After removing the floor plates, the roll rearranging work begins, but since the floor plates that serve as the work floor are large, it is difficult to secure a place to store the removed floor plates if there is only one floor plate. This is difficult, and as a countermeasure, conventionally the floor plate has been divided into several parts.

However, if there are many floor plates, the crane will have to transport them many times, and removal will take a long time. As a result, the roll changeover becomes long, leading to a reduction in line operating time and hindering production. Reducing the time required to change rolls in rolling equipment is an important issue that affects the operating rate of the equipment.

As a countermeasure to this problem, a relatively small-scale example in which only the rolls of a rolling mill are rearranged is disclosed in Japanese Patent Publication No. 12262/1983. In this method, the operating bed also serves as a rail for extracting rolls, and an actuator rolls a portion of the operating bed to form the rail. There is a method that aims to shorten the working time by extracting the roll. Although this method is often used in pipe-making equipment, it cannot be used for large-scale recombination that requires a large area, such as recombining two or three molding stands at once. Therefore, rolling operations are carried out by installing a large removable operating floor on the rails for changing the forming stands that are installed over a wide area on the work side. It is necessary to perform roll rearrangement work using the removed and exposed rearrangement rails, which requires a lot of time for slinging work and moving work using an overhead crane. Furthermore, preparing a temporary storage area for the removed operating floor not only lowered the operating rate of the rolling equipment but also required a large number of workers.

This invention simplifies the floor plate removal work.
The purpose of this invention is to provide a floor plate that can reduce the number of personnel and shorten the removal work time. A floor plate is provided, and below the movable floor plate, a plurality of guide rollers and a lifting device that can come into contact with and detach from the movable floor plate are disposed, and claw teeth are formed on the lower surface of the movable floor plate. A retractable floor plate characterized in that the claw teeth of the movable floor plate are engaged with a ratchet wheel connected to a ratchet rotating device, so that the movable floor plate can be stored below an adjacent fixed floor plate. be.

The present invention consists of a fixed floor plate and a movable floor plate as a floor plate used as a work floor during rolling operations, and only the movable floor plate can be moved up and down and horizontally and stored below the fixed floor plate, thereby improving roll assembly. This is intended to enable horizontal extraction of solid objects, etc. In other words, a movable floor plate installed on an elevating device (such as a worm jack) is lowered by the elevating device and is rotatably installed for the purpose of horizontally moving the claws formed on the lower surface of the movable floor plate. Place the movable floor plate on the ratchet wheel, move the movable floor plate horizontally by rotating the ratchet wheel, and store it under the fixed floor plate in a location where it will not interfere with the horizontal removal of roll assemblies, etc. It is a floor plate equipped with various means that can be used.

According to the floor plate of the present invention, there is no need to use a crane to lift or move the floor plate, and therefore the removal time can be shortened, the problem of temporary floor plate storage is solved, and the movement of the movable floor plate is done in 1 time. It can be easily done by humans and can reduce the number of workers.

An embodiment of the present invention will be described below with reference to the drawings.

Although this embodiment is an example consisting of two fixed floor plates and two movable floor plates, the present invention is not limited to this embodiment, and the number of movable floor plates may be one to several. .

FIG. 1 is a plan view showing the arrangement of the floor plate of the present invention, in which a roll stand 13 incorporating rolls 12 is arranged near the side of a rolling line 14 in equipment that performs horizontal punching in a direction perpendicular to the rolling line 14. Fixed floor plates 1, 1' and movable floor plates 2, 3 are disposed above the roll stand recombination rail 15.

Figures 2, 5, and 6 show the heightwise positions of the fixed and movable floor plates 1, 1', 2, and 3 during the rolling operation, and the upper surface of each floor plate 1, 1', 2, and 3 is Work floor (FL±0 side)
It's getting old.

That is, the movable floor plate 2 and the movable floor plate 3 are supported by a lifting device 4 (in this example a worm jack) and are at the same level as the fixedly arranged floor plates 1, 1'.

In addition, since the lifting device 4 in this example is self-locking, the floor plate 2,
The safety mechanism for preventing descent in step 3 is unnecessary.

3, 7 and 8 show the movable floor plate 2 and the floor plate 3 lowered to their respective predetermined positions.

The state shown in FIG. 2 changes to the state shown in FIG. 3 in the following manner.

The movable floor plate 2 and the movable floor plate 3 are lowered by operating the lifting device 4 in the downward direction, and the movable floor plate 2 rides on the guide rollers 5, after which the lowering stops. The lifting device 4 descends further until it leaves the moving floor plate 2. When the movable floor plate 2 rides on the guide roller 5, the pawl teeth 9 provided on the lower surface of the movable floor plate 2 and the ratchet wheel 7 connected to the ratchet wheel rotating device 16 mesh with each other.

On the other hand, when the movable floor plate 3 descends, the wheels 10 attached to the movable floor plate 3 come into contact with the guide rails 6 fixed to the foundation, and the descent is stopped there. The lifting device 4' is lowered to the same height as the lifting device 4 of the movable floor plate 2,
The state shown in Figure 3 will be reached.

Next, FIGS. 4 and 9 show a state in which the movable floor plates 2 and 3 are housed under the fixed floor plate 1', and the horizontal extraction passage for roll assemblies, etc. is fully opened.

From the state shown in Figure 3, the ratchet wheel 7 installed on the foundation
When is rotated by the ratchet rotating device 16, the pawl teeth 9 and the movable floor plate 2 meshing therewith move toward the fixed floor plate 1'.
When the movable floor plate 3 is moved near the bottom, the pawl teeth 9 engage with the ratchet wheel 8 installed there, and the movable floor plate 2 continues to move.As the movable floor plate 2 continues to move, the movable floor plate 2 becomes the movable floor plate. The movable floor plate 3 moves together with the movable floor plate 2, and the movable floor plate 2 and the movable floor plate 3 are all stored under the fixed floor plate 1', and the movable floor plate 3 is moved together with the movable floor plate 2. The passage is opened and the state shown in FIG. 4 is reached.

The movable floor plate 2 and the movable floor plate 3 can be returned to the positions shown in FIG. 2, respectively, and the work of closing the horizontal passage can be accomplished by performing the above-mentioned procedure in reverse.

In the embodiment described above, fixed and movable floor plates are arranged on two sides, and the movable floor plates are interlocked by the brackets 11, but when there is only one movable floor plate, only one side is fixed with a lifting device and a ratchet wheel. It can be stored under the floor plate.

As is clear from the description of the embodiments above, by installing the fixed and movable floor plate of the present invention, it is possible to open and close the movable floor plate located above the rail outside the roll assembly even by remote control. The work can be easily done by one worker, the number of workers is reduced compared to the conventional method, work efficiency is greatly improved, and the floor plate can be removed in a shorter time than the conventional method. It is possible to achieve the effect that the reclassification time can be shortened.

In the above embodiment, the movable floor plate 2,
3 are both housed under the fixed floor plate 1', but the movable floor plate 2 may be housed under the fixed floor plate 1, and the movable floor plate 3 may be housed under the fixed floor plate 1'.

[Brief explanation of drawings]

Figure 1 is a partial plan view of rolling equipment including the floor plate of the present invention, Figure 2 is an explanatory diagram showing the position of the floor plate during rolling operation, Figure 3 is a state diagram after the floor plate has been lowered, and Figure 4 is The state diagram after the floor plate is opened, Figure 5 is A in Figure 2.
- A sectional view taken along arrow A; FIG. 6 is an explanatory sectional view taken along line B-B in FIG. 2; FIG. 7 is a sectional view taken along line C-C in FIG. 3;
8 is an explanatory cross-sectional view taken along the line D-D in FIG. 3, and FIG. 9 is a cross-sectional view taken along the line E-E in FIG. 4. 1, 1'... Fixed floor plate, 2... Moving floor plate, 3... Moving floor plate, 4... Lifting device, 4'... Lifting device, 5...
Guide roller, 6... Guide rail, 7... Ratchet wheel, 8...
...Rawl wheel, 9...Claw tooth, 10...Wheel, 11...Bracket, 15...Roll stand recombination rail,
16...Rawl wheel rotating device.

Claims (1)

[Scope of utility model registration request] A movable floor plate 2 is disposed above the roll changing rail 15 which is disposed outward from near the side of the roll stand 13, and a plurality of guide rollers 5 and the movable floor plate 2 are disposed below the movable floor plate 2. A moving floor plate 2 is provided with an elevating device 4 that can come into contact with and detach from the movable floor plate 2.
The claw teeth 9 of the movable floor plate 2 are formed on the lower surface thereof, and the claw teeth 9 of the movable floor plate 2 are engaged with the ratchet wheel 7 connected to the ratchet rotating device 16, so that the movable floor plate 2 is connected to the adjacent fixed floor plate 1'. A retractable floor plate that can be stored below.