JP3048190B2 - Bridle roll threading method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
For example, the present invention relates to a method of passing bridle rolls installed to apply tension to a steel strip in a temper rolling line, an pickling line, or the like.

[0002]

2. Description of the Related Art A bridle roll is usually installed in a continuous strip steel processing line to apply a predetermined tension to the strip being processed. FIG. 5 shows an example of a temper rolling line in which bridle rolls are installed as described above. In the figure, a strip steel S is rewound from a coil by a payoff reel 1 and its shape is corrected by a payoff leveler 2. Then, after the tail end of the preceding strip and the tip of the following strip are cut by the entry-side shear 3, the leading and following strips are connected by the welder 4. Reference numerals 5 and 8 denote entrance-side and exit-side bridle rolls, between which the strip is subjected to a temper rolling mill 6 while being given a predetermined tension.
, The shape is further corrected by the tension leveler 7 to form a flat steel strip, and the connection portion is cut and separated again by the delivery shear 9. Reference numeral 10 denotes a tension reel that winds a steel strip around a coil on the delivery side.

In such a continuous processing line, when the thickness of the steel strip is large, the steel strip may be bypassed without using a bridle roll and a tension leveler, and the shape may be corrected only by a skin pass mill. Therefore, when the bridle roll is re-used after being bypassed, a threading operation is required each time, and the trouble is a problem.

[0004] The troublesomeness of this passing can be said not only in bridle rolls but also in heat treatment furnaces for continuously treating steel strip. For example, Japanese Patent Application Laid-Open No. 63-310921 discloses a continuous heat treatment furnace. Have been. This device installs winches on the inlet and outlet sides of the furnace and hangs a wire rope between both winches, and always keeps the wire rope on the furnace wall side,
At the time of passing, after moving the wire sheaves on the inlet and outlet sides of the furnace that guide the wire rope to the center of the furnace by a moving device,
The hook attached to the wire rope is engaged with a traction fitting at the end of the steel strip, and the steel strip is passed through the winch on the furnace exit side.

[0005]

Problems to be Solved by the Invention
Although the passing apparatus disclosed in Japanese Patent Application Publication No. H06-27138 has an apparatus for moving the wire sheave in the furnace width direction, the passing operation is very simple and effective. Can be used because it is flat, and it is difficult to adopt it in a bent path line such as a bridle roll.

[0006] For this reason or placed along the wire rope to the bridle roll absolutely operator intervention, work to remove from the bridle rolls to reverse it is left. In addition, since a single wire rope is used in this device, the winch drums on the entry side and the exit side need to be approximately the same diameter as the bending strength of the wire rope can be obtained. In addition, the total length of the wire rope is lengthened, which is wasteful.

[0007] The present invention solves the above-mentioned problems of the prior art, and makes it possible to work as easily as possible even if an operator intervenes in the threading of the bridle roll, and requires a small entry-side winch and a long wire rope. An object of the present invention is to provide a bridle roll passing method that can be minimized.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a method of passing bridle rolls in a continuous steel strip processing line, wherein a leading rope is attached to a central portion of a leading end of a steel strip to be passed through a connection fitting, and a belt is attached. A follow rope is attached to one edge of the steel via a connection fitting, the leading rope is wound by a winch installed on the bridle roll exit side, and the steel strip is passed through, and then the connection fittings are removed from the steel strip and read. Connect the rope and the follow rope, then wind the follow rope around the winch installed on the bridle roll entry side and at the same time pull back the follow rope to the bridle roll entry side, and then place the leading rope near each roll bearing of the bridle roll. By solving the problem of the conventional technology, Than it is.

[0009]

[Function] At the time of threading, a leading rope is attached to the center of the tip of the steel strip, and a follow rope is attached to one edge of the steel strip to pass the steel strip. Then, at the time of standby other than the time of threading, the leading rope is returned to the entrance side of the bridle roll and stored in the rope receiver provided near each roll bearing of the bridle roll.

[0010] Since the follow rope is attached to one side edge of the steel strip in this way, when the leading rope is returned to the entrance side of the bridle roll after passing the sheet and deposited in the rope receiver, it is close to the operator's hand. It becomes easier to support the rope receiver. In addition, since the leading rope and the follow rope are different, the follow rope can be thin enough to pull the leading rope, so that the entry-side winch drum can be of a small diameter and the winch itself is small, for example, a manual method. Is enough. In addition, the leading rope can be minimized.

[0011]

1 and 2, an embodiment of a bridle roll passing method according to the present invention will be described. FIG. 1 is a side view of the entrance side or exit side bridle rolls 5, 8, and FIG. 2 is a plan view thereof. The bridle roll is # 1 in this example
Each of the rolls # 1 to # 4 is provided with a snubber roll 11. These rolls # 1 to # 4 are rotatably supported by bearings 14 (the gear case side is not shown) provided on a frame 13 and a gear case 12 accommodating a distribution gear, as shown in FIG. Is driven to rotate via the distribution gear by the driving force transmitted from the motor.

Here, a description will be given of the setup of the strip of the steel strip S.
The leading rope 23 is detached from the rope receiver 26 described later, and wound around the center of the bridle rolls # 1 to # 4 as shown in the figure. In this case, the leading rope 23 is slightly pulled out from the drum of the exit winch 20 and loosened, and can be easily brought to the center of the roll by pushing it with a bar or the like having a forked end.

Then, a connecting fitting 22 is connected to the leading end of the leading rope 23, and the connecting fitting 22 is attached to the center of the leading end of the steel strip S. For example, as shown in FIG. 3, it is convenient to use a one-touch connection fitting 22 such that the steel strip S is sandwiched by a sector cam 31 supported by a pin 32 at the tip of a fork 30, as shown in FIG. In addition, 33 is a hook and this is a leading rope
23 Disengage the tip ring 23 '.

On the other hand, the follow rope 25 also has a connection fitting 24 substantially similar to that of FIG. 3 connected to the tip thereof, and this is attached to one edge of the steel strip S. Thereafter, the exit side winch 20 is rotationally driven to pass the steel strip S while winding the leading rope 23, and at the same time, the follow rope 25 is rewound by idling of the entry side winch 21. After the end of the steel strip S has passed through the bridle roll # 4, it is fixed.

Next, the connecting fittings 22, 24 are removed from the steel strip, the leading rope 23, and the follow rope 25, and the two ropes are directly connected to each other. To the # 1 roll entry side of the bridle roll. The exit winch 20 is preferably a torque motor and is preferably driven at a variable speed, and the entrance winch 21 may be of a manual type as described above.

After that, the leading rope 23 is detached from the follow rope 25, and is left in the rope receiver 26 for standby.
In this case, since the follow rope 25 is attached to the steel strip edge, the follow rope 25 is wound near the roll ends of the bridle rolls # 1 to # 4, and the leading rope 23 is also shifted to the roll end similarly. The task of depositing in the rope receiver 26 can be performed at hand. The rope receiver 26 is located near the bridle roll # 1 to # 4 roll bearing 14, and FIG. 1 shows an approximate position and FIG. 4 shows a state where the rope receiver 26 is attached to the frame 13. However, this is not limited to this shape. For example, a rope guide having a groove-shaped cross section that covers a half circumference of the bearing may be used. The rope receiver 26 is preferably provided together with the entry winch 21 on the working side of the line as shown in FIG.

The bridle roll passing method according to the present invention was carried out in a temper rolling line as shown in FIG. The strip processed by this line is 1.2 ~ 8.0mm in thickness and 700 ~ 22 in width.
The bridle roll and the tension leveler are bypassed up to a plate thickness of 6.5 to 8.0 mm. The bridle roll passing operation is performed eight times a month on average. Exit side simultaneous work),
With the implementation of the present invention, the time was reduced to about 30 minutes.
This is equivalent to an increase in processing capacity of 2400 T / month.

[0018]

When the bridle roll passing method according to the present invention is carried out, it is possible to minimize the intervention of the operator, which has been difficult to mechanize in the past, and to perform the operation safely and in a short time. And contributed to the improvement of productivity. Further, since the leading rope is shortest and the follow rope may be thin, the entry-side winch may be small and a manual method may be used, and there is an advantage that the entire apparatus is simple and inexpensive to manufacture.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a bridle roll passing method according to the present invention, showing a side surface of the bridle roll.

FIG. 2 is an explanatory view of a bridle roll passing method according to the present invention, and is a plan view of the bridle roll.

FIG. 3 is a side view showing an example of a connection fitting used in the present invention.

FIG. 4 is a drawing showing an example of a rope receiver used in the present invention.

FIG. 5 is a side view for explaining a device arrangement of a temper rolling line in an example of a processing line using bridle rolls.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Payoff reel 2 Payoff leveler 3 Incoming shear 4 Welder 5 Incoming bridle roll 6 Temper rolling mill 7 Tension leveler 8 Outgoing bridle roll 9 Outgoing shear 10 Tension reel 11 Snubber roll 12 Gear case 13 Frame 14 Bearing 15 Drive shaft 20 Out Side winch 21 Inlet winch 22 Connection bracket 23 Leading rope 24 Connection bracket 25 Follow rope 26 Rope holder

Claims (1)

(57) [Claims] 1. A method for passing bridle rolls in a continuous strip steel processing line, wherein a leading rope is attached to a central portion of a leading end of the strip to be passed through a connection fitting, and a connection fitting is attached to one edge of the strip. A follow rope is attached through, and the leading rope is wound by a winch installed on the bridle roll exit side, and the steel strip is passed through.Then, the connecting fittings are removed from the steel strip to connect the leading rope and the follow rope, Next, the follower rope is wound around the winch installed on the bridle roll entrance side, and at the same time, the leading rope is pulled back to the bridle roll entrance side. Characteristic bridle roll passing method.