JPH0337777Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a tension leveler used for removing scale formed on the surface of a strip such as a rolled steel plate or correcting the shape of the strip. More specifically, the present invention relates to a tension leveler that prevents slips between a bridle roll and the strip plate.

<Prior Art> Conventionally, strips such as rolled steel plates usually have scale attached to their surfaces during the rolling process, and are often accompanied by shape defects such as partial elongation and warpage. For this reason, a tension leveler is used, and the following will mainly discuss the tension leveler used for scale breakers.

The conventional tension leveler is as shown in Figure 2.
A pair of upper and lower roll jocks 3 and 4 are housed in a housing 2 placed on a base 1 so as to be slidable in the vertical direction. The upper roll chock 3 is suspended from the housing 2 by a cylinder 6, and the lower roll chock 4 is lifted from the housing 2 via a jack 7. Further, the roll chocks 3 and 4 are provided with a strip plate 8 under tension by a pair of bridle rolls (not shown) provided on the inlet side and the outlet side of the housing 2, respectively.
A plurality of small-diameter work rolls 9 are used to repeatedly apply bending force to generate a large number of cracks in the scale layer to facilitate scale removal in a pickling tank in the subsequent process, and the work rolls 9 are backed up. A back-up roll 10 and a plurality of deflector rolls 11 are respectively attached, and the surface of the strip 8 is used for cleaning and removing scale peeled off by repeated bending of the strip 8 and for cooling the rolls. A plurality of spray nozzles 12 for spraying liquid such as water are attached to the container.

On the other hand, on the exit side of the strip plate 8 of the housing 2, a pair of upper and lower ringer rolls 13 and 14 each having a lining made of a rubber-like elastic material such as neoprene sandwich the strip plate 8 in a frame 15 attached to the housing 2. The guide 15 of the frame 15 is
Roll yoke 16, 17 that can be raised and lowered along a
Both ends are rotatably supported by.
Further, the upper roll chock 16 is suspended from the frame 15 via a hydraulic cylinder 18 which is a chock elevating drive device provided at the upper part of the frame 15, and the lower roll chock 17 is a chock elevating drive device provided at the lower part of the frame 15. It is lifted relative to the frame 15 via an air jack 19.

Therefore, when the tension leveler is in operation, the hydraulic cylinder 18 and the air jack 1 are operated so that the roll chocks 16 and 17 are at their respective upper end positions.
9 to move the strip plate 8 to the upper and lower ringer rolls 13,
By applying pressure with 14, water droplets adhering to the surface of the strip plate 8 and flowing out to the outlet side of the housing 2 are wiped off, and a bridle roll (not shown) on the outlet side is removed.
This prevents slips between the bridle roll and the strip plate 8 due to entanglement of water droplets or the like between the bridle roll and the strip plate 8.

On the other hand, when changing the roll, use the upper and lower roll chock 3,
4 is lowered onto the rails 20 and 21 fixed to the housing 2 via the wheels 22 and 23 by operating the cylinder 6 and jack 7, respectively, and the roll jocks 3 and 4 are moved in the direction of the roll axis. Do this by pulling it out. In this case, if the pass line X of the strip plate 8 is not lowered as shown in FIG. I can't pull it out. For this reason, it is necessary to displace the pass line By lowering and pushing down the strip plate 8, the pass line X is tilted and displaced as shown by the two-dot chain line X' as shown in FIG. As a result, the upper and lower work rolls 9 and the upper and lower deflector rolls 11 are separated from the strip plate 8.
Note that the arrow Z shown in FIG. 3 indicates the direction in which the strip plate 8 moves.

By the way, in a strip processing line incorporating a tension leveler such as the one described above, such as a continuous pickling line, during operation, the operation of the line may suddenly be stopped due to, for example, an accident in which the strip 8 is cut.
Alternatively, it is often necessary to reduce the line speed (sheet threading speed) due to various operations in the middle of the line, such as side clipping.

<Problems to be solved by the invention> However, in the conventional tension leveler, the spray nozzle 1 spraying onto the strip plate 8
The liquid supplied to 2 is preset at a predetermined flow rate according to the set line speed and the properties of the strip plate 8.
When the line is stopped or the line speed is reduced as described above, it is not possible to immediately control the amount of spray liquid in response to this. As a result, a phenomenon occurs in which the spray liquid flows back to the inlet side of the strip plate of the tension leveler, and water droplets are caught between the bridle roll on the inlet side and the strip plate 8, which often causes the bridle roll to slip. It becomes impossible. As a result, it takes a lot of time and effort to remove water droplets and the like from the bridle roll, resulting in a problem of reduced production efficiency.

The present invention was developed in view of the current situation, and provides a tension leveler that can contribute to improving production efficiency by preventing slips between the bridle roll and the strip plate on the inlet side due to backflow of spray liquid. The purpose is to provide

<Means for solving the problem> In order to achieve the above purpose, the structure of the present invention is as follows.
A plurality of small-diameter work rolls and deflector rolls for repeatedly bending a tensioned strip, and a plurality of spray nozzles for spraying a liquid onto the strip are movably arranged in a housing. In the tension leveler, each of which is attached to a pair of upper and lower roll chocks, a pair of ringer rolls are disposed facing each other with the band plate in between, a pair of roll jocks each rotatably supports the ringer rolls, and A pair of ring roll devices each consisting of a frame housing a roll chock slidably in the vertical direction and a pair of chock elevating drive devices attached to the frame are arranged on the inlet side and the outlet side of the strip plate in the housing, respectively. It is characterized by what it did.

<Function> With the above configuration, a ringer roll device equipped with a pair of upper and lower ringer rolls that clamp the band plate is installed on both the inlet side and the outlet side of the band plate in the housing, so it is possible to stop the line. The spray liquid is prevented from flowing out of the housing when the line speed is decelerated, and slips between the bridle roll and the strip plate are prevented.

<Example> An example of the present invention will be described below with reference to FIG. 1, which is a schematic front view.

In FIG. 1, the same components as those in the conventional example shown in FIG. do.

That is, the band plate 8 attached to the end face of the housing 2 on the outlet side of the tension leveler shown in FIG. 2 is clamped on the end face of the housing 2 on the inlet side of the band plate 8, and A pair of upper and lower ring rolls 1 that also has the function of changing the pass line of board 8.
A ringer roll device 30 comprising 3, 14 is installed.

Therefore, when the tension leveler is in operation, the hydraulic cylinder 18 and the air jack 19 are operated so that the roll jocks 16 and 17 are located at their respective rising ends, and the strip plate 8 is moved between the upper and lower ringer rolls 13 and 14. In order to wipe off water droplets etc. adhering to the surface of the strip plate 8 by clamping the strip plate 8 on the inlet side and outlet side of the strip plate 8 in the tension leveler, the threading of the strip plate 8 can be stopped during operation, or Even if the sheet threading speed is suddenly reduced, it is possible to prevent the spray liquid such as water sprayed from the spray nozzle 12 from flowing back to the inlet side of the tension leveler. No slippage occurs between the plate 8 and the plate 8. In addition, when replacing the work roll 9, etc., please replace the ringer roll 1 on the inlet and outlet sides of the tension leveler.
3 and 14 as hydraulic cylinder 18 and air jack 19
When the strip plate 8 is lowered, the pass line of the strip plate 8 is displaced downward while remaining horizontal, and the upper work roll 9 and deflector roll 11 are released from contact with the strip plate 8, so that the rolls The upper and lower roll jocks 3, 4 to which the rolls 9, 11, etc. are attached can be smoothly pulled out from the housing 2 along the axial direction of each roll.

<Effects of the invention> As described above, according to the invention, the ringer roll device that was installed on the outlet side of the strip in the housing of the tension leveler is also installed on the inlet side of the strip in the housing. It is possible to prevent the backflow of spray liquid such as water to the inlet side and prevent slips between the bridle roll and the strip plate on the inlet side, which saves a lot of effort and work when removing water droplets etc. with the bridle roll as in the past. This eliminates the need for time and significantly improves production efficiency. In addition, since the pass line of the strip can be displaced horizontally using the ringer rolls on the inlet and outlet sides of the tension leveler, the upper ringer roll can be moved in a horizontal position compared to the conventional case where the pass line is tilted. The maximum lowering stroke of the roll can be made small, and therefore the upper chock lifting device can be made compact and economical.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of one embodiment of the present invention;
FIG. 2 is a schematic front view of a conventional example, and FIG. 3 is a conceptual diagram of a mechanism showing a change in the conventional pass line of the strip plate. In addition, the symbols in the diagram indicate 2...housing, 3...
...Top roll check, 4...Bottom roll check,
8... Band plate, 9... Work roll, 11... Deflector roll, 12... Spray nozzle, 13...
...Upper ring roll, 14...Lower ring roll, 1
5...Frame, 16...Upper roll check, 1
7...lower roll chock, 18...hydraulic cylinder, 19...air jack, 30...ringer roll device.

Claims (1)

[Scope of utility model registration request] A plurality of small-diameter work rolls and deflector rolls for repeatedly bending a tensioned strip, and a plurality of spray nozzles for spraying a liquid onto the strip are movably arranged in a housing. In a tension leveler that is attached to a pair of upper and lower roll jocks,
a pair of ringer rolls disposed facing each other with the band plate in between; a pair of roll jocks rotatably supporting the ringer rolls; a frame housing the roll jocks slidably in the vertical direction; A tension leveler characterized in that a pair of ringer roll devices comprising a pair of chock elevating drive devices attached to a frame are respectively arranged on the inlet side and the outlet side of the strip plate in the housing.