JP2001121211A - Pinch roller for carrying a plurality of structural steels - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pinch roller to uniform the sandwiching state and the carrying speed of each structural steel in the case of carrying a plurality of structural steels at a time. SOLUTION: In the pinch roller for carrying a plurality of structural steels to carry the structural steels by holding the structural steels by first and second rolls, the first roll has a plurality of projecting parts to meet the shape of an angle steel, the second roll is located above the first roll and has a plurality of recessed parts to meet the shape of the angle steel, and one of the projecting parts of the first roll or the projecting parts of the second roll are independently movable in the axial direction. The recessed parts or the projecting parts are formed of a plurality of ring rolls.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinch roller used for simultaneously transporting a large number of steel bars, and more particularly to a pinch roller used in a multi-bar steel in-line straightening / cutting system for simultaneously correcting and cutting a large number of steel bars.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open Nos. 62-120912 and 8-168919 disclose rolling, cooling, straightening,
A cutting system is disclosed. As disclosed in these, the bar steel rolled in the rolling mill is generally several tens of meters to several hundreds of meters in length, but is suitable for the cooling floor length in order to flow to the next cooling step. And cooled by a cooling floor. After that, thermal stress distortion occurs due to uneven cooling in the cooling floor.Therefore, it is necessary to perform a process of removing distortion such as bending by a straightening machine and to cut the product length, and these may be performed offline, but cooling in the cooling floor may be performed. After that, the mainstream is a method of straightening the product downstream and cutting it into a product length. At this time, it is necessary to match the rolling capacity with the equipment capacity downstream from the cooling floor, but since the speed of straightening and cutting is slower than the rolling speed, in the process of straightening and below, multiple strips that simultaneously process multiple steel bars A method of equalizing the entire processing capacity by straightening and cutting is adopted. As described above, when a plurality of steel bars are transferred at a time, a pinch roller for transfer is installed between the straightening machine and the cutting machine or before and after the cutting machine. For the roll of the pinch roller, use upper and lower rolls with grooves according to the number and shape of the strips to be conveyed, and guide the straightening machine to the cutting machine and press the The bar is being transported to the downstream table. The multi-strip group sent from the straightening machine is cut by a cutting machine at the same time after being sent for a predetermined length and stopped or after being sent for a predetermined length during traveling, and cut to a predetermined product length. It will be.

[0003]

When a group of multiple strips is transported by a pinch roller as described above, there is some disturbance in the spacing between the strips during the transport. This is sandwiched while adjusting the pitch of each bar to the caliber pitch (groove pitch) of the pinch roller. At this time, if the caliber pitch of the lower roll does not exactly match the caliber pitch of the upper roll, the pinching position of the bar and the upper and lower rolls with respect to the groove shape occurs, and the pinch roller pinch force (force for holding the bar). However, there is a problem that the feed rate changes for each groove and the feed speed of each bar changes. In order to match the caliber pitch of the upper and lower rolls, it is possible to increase the processing accuracy of the rolls, or to adjust and manage the caliber pitch so that the upper and lower rolls match when the upper and lower rolls are assembled into the main body frame. It is very difficult in actual operation. Therefore, there is a problem in that a difference occurs in a feeding speed between a plurality of steel bars conveyed by the pinch rollers, so that the conveying distance varies, and when cutting a predetermined product length, the cutting length varies.

An object of the present invention is to provide a pinch roller which solves the above-mentioned problems and makes the sandwiching state of each bar uniform when a plurality of bars are conveyed at one time, so that the conveying speed is uniform for each bar. With the goal.

[0005]

The above object is achieved by the following invention. In the first invention, the first roll and the second roll
In a multi-strip steel transport pinch roller that transports by sandwiching a steel bar between rolls, the first roll has a plurality of convex portions that match the shape of the angle iron, and the second roll is a roll of the first roll. It has a plurality of concave portions located above and conforming to the shape of the angle iron, and one of the convex portion of the first roll or the convex portion of the second roll is independently movable in the axial direction. This is a pinch roller for conveying multi-section steel.

The second invention of the present invention is the pinch roller for transporting a multi-strip steel according to the first invention, wherein the concave portion or the convex portion is formed by a plurality of ring rolls.

[0007] The problem that the feed speed of a plurality of strips is different is that the angle of the angle steel is increased by the roll which is not the drive roll, or, when both are the drive rolls, either the upper roll or the lower roll. The present invention has been completed by finding that a plurality of grooves adapted to the above can be solved by allowing the grooves to freely move in the axial direction independently of each other. Normally, the groove of the roll is fixed and is integrally formed with the roll, so each groove cannot move independently, but in the present invention, since it is movable, the center of the angle iron is naturally formed during the sandwiching process. And the center of each groove coincides with each other, and each bar can be sandwiched in a uniform state.

[0008] As a mechanism in which the plurality of grooves independently and freely move in the axial direction, the grooves adapted to the shape of the angle iron are formed into a ring roll structure one by one, and a contact portion of each ring roll with the roll shaft is provided. The one using a sliding bearing was adopted.

[0009]

FIG. 1 is an explanatory diagram of an embodiment of the present invention. As shown in FIG. 1A, the basic configuration of a pinch roller for transporting a multi-strip steel includes a first roll 1 and a second roll 2 placed above the first roll 1 and the first roll 1 and the second roll. 2 and transport the steel strip so as to sandwich it.

The first roll 1 has the same number of strips that convey convex portions having a triangular cross section corresponding to the angle of the angle iron, and the second roll 2 placed above the first roll 1 has a triangular cross section corresponding to the angle of the angle iron. No. of the V-shaped groove is carried by the number of the strips to be conveyed. In the conventional pinch roller, the convex portion 3 of the first roll and the concave portion 4 of the second roll are fixed,
As shown in FIGS. 1B and 1C, in the present invention, the convex portions and the concave portions are formed by the ring rolls 3 and 4 so as to be movable. Now, consider a case where at least the first roll 1 is a drive roll. In the second roll 2, a slide bearing 7 is provided between the second roll shaft 6 and the inside of the ring roll 4 to enable the ring roll 4 to move in the axial direction. In the first roll 1, the ring roll 3 is fixed to the first roll shaft 5. Here, both rolls have a ring roll structure, but in the case of a roll that does not need to move the protrusions and recesses in the axial direction, a normal integrated roll in which the protrusions and recesses are integrated with the roll shaft may be used. .

If at least the second roll 2 is a drive roll, the convex portion of the first roll 1 may be movable in the axial direction, and the second roll 2 may be a roll having a fixed concave portion. As the second roll 2, the ring roll 4 may be fixed and used, or a normal integral roll may be used.

In the conventional pinch roller, the convex portion of the first roll and the concave portion of the second roll are fixed.
As described above, in the present invention, one of the rolls enables the movement of the concave and convex portions in the axial direction, so that the centers of the peaks of the pinch rollers are aligned up and down, and a plurality of strips can be uniformly sandwiched between the rolls. Speed can be kept constant. The movable range in the axial direction of the ring rolls 3 and 4 forming the concave portions or the convex portions is 0.5 m for an angle iron having a side of 75 mm.
About m to 2 mm is sufficient for the effect. This range of motion is sufficient for other sizes of angle irons.

At this time, the first roll 1 and the second roll 2
When a magnet (not shown) is attached to the surface of the steel bar, it is possible to more strongly sandwich the bar steel, which is effective.

The present invention can also be applied to a case where the configuration of the pinch roller itself is different. FIG. 2 shows another embodiment of the present invention. The pinch roller is made up of a total of three rolls: two first rolls 1 arranged horizontally in the line direction so as to adjust the interval, and one second roll 2 arranged above the first roll. The case where the configuration is changed will be described. In this case, the second roll 2 is arranged at an arbitrary position above the two first rolls 1 and the second roll 2 is lowered only during use, and the interval between the two first rolls 1 and the second roll 2 By adjusting the rolling force when the second roll 2 is lowered at the stationary position of No. 2 and by pinching with the rolling force suitable for the size of the bar product, it is possible to reliably pinch even a bar group having a difference in thickness. In such a pinch roller, since the drive roll is the first roll, the present invention is preferably applied only to the second roll 2. The tips of the plurality of conveyed steel bars 7 enter while climbing on the upper surface of the first roll 1,
The pitch of each bar is adjusted to the caliber pitch (groove pitch) of the roll 1. At the time of being sandwiched by the second roll 2, each caliber pitch of the first roll 1 and each bar are in the same position. In this state, when the second roll 2 is pinched, if the caliber pitch of the second roll 2 does not exactly match the caliber pitch of the first roll 1, the gap between the steel bar 7 and the second roll 2 will not increase. And the force for holding the bar by the pinch roller changes for each groove, resulting in a difference in the feed speed of each bar.
In the present embodiment, the second roll 2 has a ring roll structure, and each roll can freely move independently in the roll axis direction. Therefore, the caliber pitch of the first roll 1 and the caliber pitch of the second roll 2 are set to be equal to each other. Can be matched. The present invention can be applied to various types of pinch rollers other than the three-roll pinch roller.

The pinch roller of the present invention is used for conveying a multi-section steel bar. In particular, a plurality of bar steels are arranged and used for conveying an angle iron in-line for straightening and cutting at the same time. FIG. 3 shows an example in which a pinch roller according to the present invention is arranged. After the multi-story steel 7 is straightened by the multi-story straightener 8, in particular, by arranging the pinch roller 10 of the present invention before and after the running cutting machine 9, the multi-story steel 7 is bitten by the multi-story straightener 8. Even in the finished state, the conveying speed of each bar 7 is constant, and a product of uniform length can be cut.

[0016]

When the pinch roller of the present invention is used, when a plurality of angle irons are simultaneously transferred, the transfer speed of each angle iron can be made uniform. If used before and after the cutting machine, the variation in the cutting length of the product can be suppressed to a small value. Since it is only necessary to slightly process the roll of the pinch roller currently used, it can be applied to any type of pinch roller and can be immediately applied to the line currently in operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a pinch roller according to an embodiment of the present invention as seen from a line direction.

FIG. 2 is a cross-sectional view taken along a line perpendicular to a line of a pinch roller according to another embodiment of the present invention.

FIG. 3 is an explanatory diagram of an example in which a pinch roller according to the present invention is arranged, and is a diagram illustrating an inline straightening / cutting system of a hot strip steel rolling line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st roll 2 2nd roll 3 1st roll ring roll (convex part) 4 2nd roll ring roll (concave part) 5 1st roll shaft 6 2nd roll shaft 7 bar steel 8 Multi-straightening machine 9 Cutting while running Machine 10 Pinch roller

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B65H 51/10 B65H 51/10 A

Claims (2)

[Claims] 1. A multi-strip steel transport pinch roller for transporting a steel strip by sandwiching the steel strip between a first roll and a second roll, wherein the first roll has a plurality of convex portions adapted to the shape of the angle iron. , The second roll is the first roll
It has a plurality of concave portions located above the roll and conforming to the shape of the angle iron, and one of the convex portion of the first roll or the concave portion of the second roll is independently movable in the axial direction. Characterized pinch roller for conveying multi-section steel. 2. The pinch roller according to claim 1, wherein the concave portion or the convex portion is formed by a plurality of ring rolls.