JPH0719608Y2 - Locking device for roll changing device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is mounted on a roll changing device constituted by a turntable system of a rolling mill, and holds a roll mounted on a turntable of a turntable immovably. The present invention relates to a locking device.

[Conventional technology]

In a rolling mill, when replacing a rolling roll worn by a rolling operation with a new roll, first, pull out a pair of upper and lower rolling rolls from the housing of the rolling mill in a two-tiered state with chocks, and then replace the new pair of upper and lower rolling rolls with chocks The rolls are assembled into the housing in a stacked state, and the work of changing the rolls for the rolling mill is completed.

FIGS. 7 and 8 show an example of a conventional roll changing apparatus used for performing a roll changing operation in this rolling mill.
Description will be given with reference to the drawings.

The rolling mill 4 has a housing 40, a pair of upper and lower rolling rolls 41 and a pair of upper and lower backup rolls 42 mounted on the housing 40, and rails 45 for transporting rolls when the rolls are recombined.

The roll changing device is composed of a turntable 2 arranged on the operating side of the rolling mill 4 and a transport deck 3 arranged on the opposite side of the rolling table 4 with the turntable 2 interposed therebetween.

The turntable 2 is composed of a fixed table 28 and a rotary table 20 arranged in the central portion of the fixed table 28. The turntable 20 has a symmetrical upper surface (a vertical symmetrical surface in FIG. 7) on the upper surface of the rotary table 20. A rail 23 and a second rail 24 are laid so that a roll to be exchanged can be mounted on the other rail while a new roll is mounted on one rail. A fixed rail 29 that is connected to the rail 45 of the rolling mill 4 is laid on the fixed table 28. The fixed rail 29 is rotated by 180 ° with respect to the fixed table 28, so that the first The connection between the rail 23 and the second rail 24 is switched. The rotary table 20 is composed of a rotary part 21 and a fixed part 22, the rotary part 21 is rotatably supported by the fixed part 22, and a drive mechanism composed of a motor 25, a speed reducer 26 and a gear 27. Is driven to rotate.

The transport deck 3 for transporting rolls has a transport rail on the upper surface.
32 is laid and configured to carry a new roll into the turntable 2 or carry out a roll to be replaced from the turntable 2.

The second rail of the turntable 2 passing over the transport deck 3.
A pair of new upper and lower rolling rolls 41 is loaded onto the 24, and the rotary table 20 is rotated 180 ° to fix the first rail 23 to the fixed rail 2
Connect to 9 and wait.

From this state, the pair of worn upper and lower rolling rolls 41 from the housing 40 of the rolling mill 4 are attached to the chock 43 of the lower rolling roll 41 in a two-tiered state with the chock 43, and the wheels 44 attached to the chock 43 are used. Then, it is carried out from the rail 45 onto the first rail 23 through the fixed rail 29 of the turntable 2.

Thus, with the worn rolling roll 41 on the first rail 23 and the new rolling roll 41 on the second rail 24 (or vice versa), the rotary table 20 is rotated 180 ° to rotate the second rail 24. Is connected to the fixed rail 29, the new rolling roll 41 mounted on the second rail 24 is incorporated into the housing 40 through the fixed rail 29 and the rail 45, and thus the roll rearrangement of the rolling mill 4 is completed.

Rotary table for roll changing work of this rolling mill 4
In order to prevent the rolls mounted on the first rail 23 and the second rail 24 from self-propelled on the rails and jumping out of the rotary table 20 by the rotary operation of the rotary table 20 during the rotary operation of 20. The rail surfaces of the first rail 23 and the second rail 24 are provided with recesses into which the wheels 44 are fitted.

[Problems to be solved by the device]

The reassembling work between the new roll and the worn roll is performed while the rolling line is at rest, so it is required to be achieved as soon as possible, but the work time for this roll reassembling work is shortened. The simplest and most effective means is to rotate the roll-mounted turntable 20 as fast as possible.

However, the restraining force on the wheels 44 by the recesses provided on the rail surfaces of the first rail 23 and the second rail 24 is not sufficient for the mounting rolls when the rotating table 20 rotates, and thus the conventional rotating table 20 is not provided.
The rotation speed of was limited to about 1.7 rpm.

As a means for eliminating this dissatisfaction, a means for increasing the depth of the recess formed on the rail surfaces of the first rail 23 and the second rail 24 is conceivable, but on the first rail 23 and the second rail 24, There arises a problem that it hinders the traveling movement of the roll.

Therefore, the present invention has been devised to solve the above-mentioned problems in the prior art, and it is necessary to exert a strong and stable restraining force on the rotating table on the roll mounted on the rail of the rotating table when necessary. The technical problem is to enable high-speed rotation of the rotary table with the roll mounted.

[Means for Solving the Problems]

Means of the present invention for solving the above technical problem are to be mounted on a roll changing device in which a first rail and a second rail are symmetrically laid on a turntable of a turntable arranged on the operating side of a rolling mill housing. This locking device has an upper end protruding above the rotary table.
In this configuration, stopper pins for locking the chocks at both ends of the rolls mounted on the first rail and the second rail from inside are provided on the rotary table so as to be movable up and down.

As the locking device, a first stopper pin arranged near one side of the inner rail of the first rail, a second stopper pin arranged near one side of the inner rail of the second rail, and both stopper pins are integrally displaced up and down. A pair of stopper bodies composed of an elevating cylinder for rotating, and one of the stopper bodies facing the inside of one chock of the roll and the other of the rolls mounted on the rotary table. It is better to have a structure in which they are arranged facing each other inside the chock.

[Action]

With the old and new rolls mounted on the first and second rails of the rotary table, the stopper pin of the locking device,
The upper end of the roll is raised and projected onto the rotary table until it engages with the insides of both chocks of the roll.

In this way, when the locking device is driven and the upper ends of the stopper pins are locked inside both chocks of the old and new rolls, the new and old rolls mounted on the first rail and the second rail via wheels are Not only is it impossible to move on the rail, but also the stopper pin strongly holds it immovably.

For this reason, by rotating the rotary table at high speed with the old and new rolls installed, even if a strong inertial force acts on the installed rolls as the rotary table rotates, this inertial force is overcome and the stopper pin Holds the roll on the rail, so that the roll is held on the turntable without popping out.

〔Example〕

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

The same parts as those of the conventional example shown in FIGS. 7 and 8 are designated by the same reference numerals, and detailed description thereof will be omitted.

1 to 3 show an assembling positional relationship of a locking device 1 according to the present invention with respect to a turntable 2, particularly a rotary table 20, wherein FIG. 1 is a plan view and FIG. 2 is a side view.
FIG. 3 is a front view.

The locking device 1 is composed of a pair of stopper bodies 10, and one stopper body 10 faces the inside of a chock 43 on one side of the old and new rolling rolls 41 mounted on the rotary table 20, and the other side. The stopper body 10 faces the inside of the chock 43 on the other side of the rolling roll 41 and faces the rotary table.
Installed on 20.

The stopper body 10 is, as shown in FIGS. 4 to 6,
While forming a part of the table surface of the rotary table 20,
A mounting base plate 11 that serves as a portion for mounting the stopper body 10 on the rotary table 20, a pair of stopper pins 12 for projecting an upper end portion above the rotary table 20 from a through hole formed in the mounting base plate 11, and the pair of stopper pins 12. Stopper pin
It is composed of one lifting cylinder 15 for vertically moving 12 together, and both stopper pins 12 and the lifting cylinder 15 are attached to the lower surface side of the mounting base plate 11.

Both stopper pins 12 in the shape of a straight rod are attached to a mounting plate 14 which is fixed to the lower surface of the mounting base plate 11 in a hanging manner.
The stopper pins 12 are mounted so as to be movable up and down through a pair of guide blocks 13 provided at the upper and lower ends of the stopper block 12, and the stopper pins 12 are integrally connected by a connecting arm 18.

The elevating cylinder 15 is mounted between the lower ends of a pair of support plates 17 fixed to the lower surface of the mounting base plate 11 in the middle of both stopper pins 12, and the tip of the piston rod 16 projecting upward is It is pivotally attached to the center of the connecting arm 18. The support plate 17 has a bent shape, as shown in FIG. 4, so as not to interfere with the vertical movement of the connecting arm 18.

As shown in FIG. 6, one of the two stopper pins 12 is near the inner rail piece between the rail pieces of the first rail 23 laid on the rotary table 20, and the other is the rail piece of the second rail 24. They are located near one side of the inner rail between them, and as shown in FIG. 5, both stopper pins 12 are
It is arranged so as to face the inner edge of the chock 43 of the rolling roll 41 mounted at a fixed position on the first rail 23 and the second rail 24, and when it is displaced upward, the inner end surface of the chock 43 is surrounded by its upper end portion. The surfaces are brought into contact with each other.

Both the old and new rolling rolls 41 are the first rail 23 and the second rail.
When mounted in a fixed position set by the depression on the 24, the lifting cylinder 15 is driven to push up the connecting arm 18 from the state shown in FIGS.
The upper end of 12 is projected onto the rotary table 20, and the upper end of this stopper pin 12 is brought into contact with the inner surfaces of the chocks 43 of both rolling rolls 41.

Since a pair of stopper bodies 10 are provided corresponding to both chocks 43 of the rolling roll 41, the rails 23, 24
The stopper pins 12 come into contact with the inner surfaces of both chocks 43 of the rolling roll 41 mounted on the rolling roll 41, and therefore the rolling roll 41 has stopper pins 12 at both ends thereof.
Since the rolling roll 41 is locked to the rail 12, the rolling rolls 41 on both rails 23 and 24 are locked and held on the rail so as not to run.

In this way, the rolling rolls 41 on the first rail 23 and the second rail 24 are strongly retained by the retaining device 1, so that even if the rotary table 20 is swung at high speed, the rails 23, 24 are not rotated.
The upper rolling roll 41 does not run on its own and jump out of the rotary table 20.

According to the operation results of the example, the time required to turn the rotary table 20 180 ° with the rolling rolls 41 mounted on the rails 23 and 24 can be reduced by 18 seconds while maintaining an extremely safe operating condition. It was

It should be noted that both stopper pins 12 have their upper end surfaces at substantially the same position as the upper surface of the mounting base plate 11 at the lower limit thereof.
The lower limit position is set so that the hole portion that obstructs the work is not formed as much as possible on the upper surface of the rotary table 20 that provides the work floor surface. Further, in the illustrated embodiment, the rising limit position of the stopper pin 12 is set by contacting the end of the connecting arm 18 fixed to the stopper pin 12 with the lower surface of the upper guide block 13. , Stopper pin by other suitable means
The upper limit position of 12 is set, and the stopper pin 12 stopped at the upper limit position is locked by this means so that the stopper pin 12 cannot be displaced up and down, thereby making the locking and holding action of the stopper pin 12 with respect to the rolling roll 41 more stable. Is effective.

[Effect of device]

Since the present invention has the above-mentioned configuration, it has the following effects.

Since the roll mounted on the rail of the rotary table is locked and held, even if the rotary table is swung at high speed, the roll does not displace on the rail due to the inertial force associated with this rotary operation, which is reliable and safe. Since the roll table is stopped and held, the rotary table can be swung at high speed with the roll mounted, and thus the working time required for roll replacement can be greatly shortened.

Since the stopper pin for locking and holding the roll on the rail achieves and releases the locking with the roll by a simple lifting displacement, the operation of the locking device is simple and its structure is also simple.

Since the stopper pin only moves up and down, it is possible to prevent the hole that interferes with the work from being left open on the rotary table surface that provides the work surface. It does not reduce the safety of work on the upper surface of the rotary table.

[Brief description of drawings]

FIG. 1 is an overall plan view of a turntable assembled with an embodiment of the present invention. FIG. 2 is an overall side view of the embodiment shown in FIG. FIG. 3 is an overall front view of the embodiment shown in FIG. 4 to 6 show the detailed construction of the embodiment of the present invention shown in FIG. 1. FIG. 4 is a side view showing only the lifting cylinder portion, and FIG. 5 is a stopper pin portion. FIG. 6 is a side view showing only the above, and FIG. 6 is an overall front view. FIG. 7 is an overall plan view of the roll changing device arranged near the rolling mill. FIG. 8 is an overall side view of the roll changing device shown in FIG. DESCRIPTION OF SYMBOLS 1; Locking device, 10; Stopper body, 11; Mounting base plate, 1
2; Stopper pin, 13; Guide block, 14; Mounting plate,
15; lifting cylinder, 16; piston rod, 17; support plate, 18;
Connecting arm, 2; turntable, 20; rotating table, 21;
Rotating part, 22; Fixed part, 23; First rail, 24; Second rail, 2
5; motor, 26; reducer, 27; gear, 28; fixed table, 29;
Fixed rail, 3; transport deck, 30; transport rail, 4; rolling mill, 40; housing, 41; rolling roll, 42; chock, 43;
Backup rolls, 44; wheels, 45; rails.

Claims (2)

[Scope of utility model registration request] 1. A rotary table (2) of a turntable (2) arranged on the operating side of a housing (40) of a rolling mill (4).
0) symmetrically above the first rail (23) and the second rail (2
4) In the roll rearranging device, the chocks at both ends of the roll mounted on the first rail (23) and the second rail (24) with the upper end protruding above the rotary table (20). A locking device for a roll rearrangement device, comprising a stopper pin (12) which is locked to the inside (43) so as to be movable up and down on the rotary table (20). 2. A stopper pin (12) arranged near one side of the inner rail of the first rail (23) and a stopper pin (12) arranged near one side of the inner rail of the second rail (24).
And a pair of stopper bodies (10) composed of a lifting cylinder (15) for vertically lifting and displacing both stopper pins (12) are provided, and the stopper is provided for the roll mounted on the rotary table (20). A structure in which one of the bodies (10) faces the inside of one chock (43) of the roll and the other faces the inside of the other chock (43) of the roll. The locking device of the roll rearrangement device according to 1.