JP3402982B2 - Strip conveyor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus capable of conveying thin strips at high speed in hot rolling, and is applicable to cold rolling equipment. 2. Description of the Related Art FIG. 3 shows a main structure of a conventional hot rolling equipment. As shown in the drawing, a run-out table 2 is connected to the exit side of a final stand rolling mill 1 of a finishing rolling mill row in which a plurality of rolling mills are arranged in a row, and the finish rolling mill row has a predetermined thickness. The finish-rolled strip 3 is conveyed on a run-out table 2, cooled, and then wound around a coiler 4. [0003] Here, as shown in FIG.
Is located on the run-out table 2 and does not reach the coiler 4, the leading end of the strip 3 rises, and a so-called flying phenomenon occurs. When this flying phenomenon occurs, the running performance on the run-out table 2 is remarkably deteriorated, and winding failure or poor winding at the coiler 4 has occurred. This tendency becomes remarkable as the thickness of the strip 3 becomes thinner and the passing (conveying) speed increases. [0004] For this reason, generally, the strip 3 is rolled at a relatively low threading speed (threading speed) until it reaches the coiler 4 and is wound thereon, and accelerates after the winding on the coiler 4 is completed. Rolling at the top speed. [0005] In recent years, continuous rolling has been planned in the production of hot strip. This means that instead of rolling the rough bars one by one as in the past batch rolling, several rough bars are joined in front of the finishing mill row, and the plate passes without interruption in the finishing mill row. Since it is possible to always roll under a constant tension, it is possible to expect the production of a uniform and good hot strip, which leads to an increase in productivity due to an improved yield. [0006] However, continuous rolling requires large-scale capital investment or remodeling. As an alternative to this, as an alternative, the strip is conveyed at a higher speed on a run-out table on the exit side of the finishing mill line. It is considered to improve productivity. However, as described above, when a strip is conveyed at a high speed on a run-out table, a flying phenomenon occurs.
As disclosed in Japanese Unexamined Patent Publication (Kokai) No. H05-195, a method of mechanically gripping the end of a strip with a clamp device on a traveling vehicle is disclosed.
As described in JP-A-154603, a method of avoiding the flying phenomenon by injecting air from above into the tip of the strip has been proposed.
As described in Japanese Patent Application Publication No. 101-101, a method has been proposed in which the leading end of a strip is suctioned by an electromagnetic force and conveyed. However, in these methods, heavy objects such as a device for gripping the leading end of the strip, a device for sucking the device, and a device for injecting air must be rapidly accelerated in order to synchronize with the speed of transporting the strip. It is also difficult to realize economically. Further, there are also difficulties in securing a trajectory for moving these and returning them to their original positions. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a strip transport apparatus capable of transporting a strip at a high speed on a run-out table by enabling the strip to run stably with small-scale modification. I do. [0010] In order to achieve the above object, a strip transport apparatus according to the present invention comprises a drive table and a driven pulley mounted on a transport table on which a strip is placed and transported. A strip running stabilizer made of a turned material such as a wire rope is installed, and the material is run at a speed equal to or higher than the transport speed of the strip, and the material is bent by its own weight to produce a catena.
It is characterized by being multiplied to form a Lie curve . According to the above construction, the strip is transported at a high speed on the transport table, and even when the leading end flies, the strip is moved on the transport table at a speed equal to or higher than that of the strip. If so, the height of the flying does not increase any more, and the flying does not occur due to the reaction force due to the traveling or collision with the strip. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a strip conveying apparatus according to the present invention will be described in detail with reference to embodiments. [First Embodiment] FIG. 1 is a schematic side view of a strip conveying device in a hot rolling facility according to a first embodiment of the present invention. As shown in FIG. 1, a run-out table 2 is connected to the output side of a final stand rolling mill 1 of a finishing rolling mill row having a plurality of rolling stands arranged in a row, and a predetermined number of rolling mills are arranged in the finishing rolling mill row. The strip 3 finished and rolled to a thickness is conveyed on a run-out table 2, cooled, and then wound around a coiler 4. Above the run-out table 2, a strip running stabilizing device 7 comprising a driving pulley 5a, a driven pulley 5b, and a wire rope 6 wrapped around them is installed. Alternatively, the wire rope 6 runs (rotates) at a higher speed.
It is supposed to. The wire rope 6 includes pulleys 5a, 5b
Since the span L between them is substantially equal to the entire length of the run-out table 2, a deflection δ due to its own weight is generated, and the curve becomes a canary curve. Flying of the strip 3 can be prevented by the weight of the weight of the wire rope 6. The installation height H of the strip running stabilizer 7 on the run-out table 2 is suitably about 0.3 to 0.4 m in consideration of the maximum flying height of the strip 3. In order to drive the wire rope 6,
Drive tension (T ₁ −T ₂ ) for the drive pulley 5a at all times
It is necessary to stretch the wire rope 6 in such a manner that the wire rope 6 is stretched. Further, one or a plurality of wire ropes 6 are arranged in parallel in the width direction of the strip 3 corresponding to the width of the strip. With this configuration, the strip 3
Is transported on the run-out table 2 at high speed, and even if the tip flies, if the wire rope 6 is run on the run-out table 2 at a speed equal to or higher than that of the strip 3, the flying height is reduced. This is not the case, and the vehicle does not fly due to a reaction force due to running as it is or collision with the wire rope 6. Since the wire rope 6 travels at a speed equal to or higher than that of the strip 3, friction does not occur when the strip 3 hits the wire rope 6, and the run-out table 2 when flying occurs.
The above waving phenomenon can be prevented. Further, according to the present strip running stabilizer 7, the waving phenomenon of the strip 3 which occurs when the rear end of the strip 3 is disengaged from the final stand rolling mill 1 and the tension is reduced by half can be suppressed. [Second Embodiment] FIG. 2 is a schematic side view of a strip conveying device in a hot rolling facility according to a second embodiment of the present invention. This is because, in the strip running stabilizer 7 in the previous embodiment, the end of the upstream wire rope 6 and the start of the downstream wire rope 6 are connected to the drive motor 8.
And the run-out table 2 according to the length of the run-out table 2 and the wire rope 6.
In this example, a plurality of sets are connected in the longitudinal direction, and the operation and effect are the same as those of the first embodiment. Incidentally, the present invention is not limited to the above-described embodiment, but may be a band-shaped wire made of a wire material instead of a wire rope, or any other material considering heat resistance and strength, without departing from the gist of the present invention. Various changes, such as using a strip material, are possible. Further, the present invention can be applied to cold rolling equipment. As described above, according to the present invention, when the strip is transported on the transport table, the strip is stably run by preventing the occurrence of flying or the like by a small-scale modification. This makes it possible to increase the transport speed more than before. Therefore, the rolling time can be shortened, and the productivity can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view of a strip conveying device in a hot rolling facility showing a first embodiment of the present invention. FIG. 2 is a schematic side view of a strip conveying device in a hot rolling facility according to a second embodiment of the present invention. FIG. 3 is a schematic side view of a strip transport device in a conventional hot rolling facility. FIG. 4 is an explanatory view showing a conventional problem. [Description of Signs] 1 Final stand rolling mill 2 Run-out table 3 Strip 4 Coiler 5a Drive side pulley 5b Driven side pulley 6 Wire rope 7 Strip running stabilizer 8 Drive motor

Continuation of the front page (56) References JP-A-5-131217 (JP, A) JP-A-8-197134 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 39 / 14 B21B 39/12 B21C 47/34

Claims (1)

(57) [Claims 1] A strip running stabilization comprising a driving and driven pulley and a strip material such as a wire rope wrapped around the driving and driven pulleys above a transport table on which the strip is mounted and transported. An apparatus is installed, the strip is run at a speed equal to or higher than the strip transfer speed, and the strip is bent by its own weight to form a catenary curve and the strip is transported. apparatus.