JP2000107808A - Device for synchronizing pinch roll for steel strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pinch roll synchronizing device whose troubles are lessened and which is adjustable in a short time even when synchronistic function is lost. SOLUTION: This device is the synchronizing device for vertically moving the lower roll of the pinch rolls for steel strips with a pair of right and left connecting rods 12a, 12b and consists of a pair of racks 31, 31 which are respectively attached to the right and left connecting rods and a pair of pinions 40, 40 which are attached to a synchronizing shaft and engaged with a pair of the racks respectively. Those pinions have synchronizing shaft fastening means for adjusting engagement between the teeth of the rack and the teeth of the pinion in their insides.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tuning device for moving left and right bearing boxes of a lower pinch roll uniformly up and down.

[0002]

2. Description of the Related Art A pinch roll is installed upstream of a winder, and is used for holding a steel strip conveyed from a rolling mill between upper and lower rolls, driving the steel strip, and supplying the steel strip to the winder. I have. FIG. 7 shows an example of installation of a pinch roll. In this example, it is installed before the shearing machine 3. The steel strip 8 rolled by the rolling mill 1 is conveyed to the pinch roll 2,
After being pinched and driven by the pinch roll 2 and driven to the shearing machine 3, after being cut there (then the teeth of the shearing machine are retracted and the pass line is opened), the traveling direction is switched by the switching roll 4. Then, it is sent to the first winder 6 via the guide 5a or to the second winder 7 via the guides 5b and 5c. The pinch roll 2 is released when the end of the steel strip 8 is wound around the winding machine.

[0003] The pinch roll is composed of an upper roll fixed to a housing guide and a lower roll moving up and down along the housing guide. The lower roll is used to uniformly hold the steel strip in the width direction. A tuning device is provided for moving the left and right bearing boxes equally in the right and left directions. This tuning device will now be described. FIG. 5 is a front view of a pinch roll provided with a conventional tuning device, and FIG. 6 is a view taken along the line AA of FIG. Left and right bearing boxes 13a, 13b of upper roll 13
Are fixed to the left and right housing guides 25a and 25b via springs. Bearing box 1 for lower roll 14
4a, 14b are engaged with the housing guides 25a, 25b so as to be vertically movable. Bearing boxes 14a, 14b
Are attached to the left and right ends of a beam 16 extending left and right below the lower roll.

The lower ends of the left and right connecting rods 12a and 12b are connected to the left and right of the beam 16, while the upper ends of the connecting rods 12a and 12b are connected to the left and right hydraulic cylinders 11a and 11b provided at the upper part of the housing. 11b. With this configuration, the hydraulic cylinder-11
When the rods 11a, 11b are extended, the bearing boxes 14a,
When the rod 14b is lowered (the lower roll 14 is lowered) and the rod is shortened, the bearing boxes 14a and 14b are raised (the lower roll 14 is raised). However, the left and right hydraulic cylinders-11
It is impossible to equalize the amount of expansion and contraction of the rods a and 11b due to the characteristics of the hydraulic cylinder. For this reason,
The following tuning devices are provided.

That is, the beam 1 is located on the lower side of the beam 16.
Tuning shaft 1 supported by bearings 18a and 18b in parallel to 6
7 is provided at each of the left and right ends of the tuning shaft 17.
One end of one link 19, 19 is fixed. On the other hand,
Bracket 2 having pins protruding from the left and right lower portions of
1a and 21b, and attach the second link 2 to these pins.
0, 20 are connected at one end, and the other end is connected to the first link 19, 19.
Is connected to the other end by a pin. And the tuning axis 17, the first
The movements of the bearings 14a and 14b supported by the beam 16 by the links 19 and 19 and the second links 20 and 20 are synchronized. 22 is a universal coupling attached to the drive shaft of the upper and lower rolls, 23
Is a speed reducer and 24 is an electric motor.

[0006]

However, the above-mentioned tuning apparatus using the link and the tuning axis has the following problems.

(1) There are many failures in which the tuning function is lost due to uneven wear of the bush and pins of the left and right links and torsion generated in the links during use, and it takes time for repair and adjustment, and repair cost is increased. Bulky.

(2) When the tuning function is lost, as shown in FIG. 8, the clamping pressure on one side of the upper and lower rolls 13 and 14 becomes higher than that on the other side, and one side of the steel strip is shown in FIG. Such wrinkles S and cracks C are generated, and the product yield of the steel strip is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pinch roll tuning apparatus which solves the above-mentioned problems, has few failures, and can be adjusted in a short time even if the tuning function is lost.

[0010]

According to the present invention, the above object is achieved by the following apparatus.

A first device is a tuning device for vertically moving a lower roll of a steel strip pinch roll by a pair of left and right connecting rods, and a pair of racks attached to each of the left and right connecting rods. And a pair of pinions attached to a tuning shaft and meshing with the pair of racks, respectively, wherein the pinion has a tuning shaft fastening means capable of adjusting the meshing between the teeth of the rack and the teeth of the pinion. Is a pinch roll tuning device.

The second device is the same as the first device, except that the tuning shaft fastening means has an outer ring having a gradient on the inner periphery, an inner ring having a gradient on the outer periphery, and a gradient on the inner and outer periphery. A first taper ring, a second taper ring having a gradient on the inner and outer circumferences, and a plurality of fastening bolts, wherein the first taper ring includes a plurality of fastening bolts. The second taper ring has a plurality of screw holes into which fastening bolts are screwed, and the first and second taper rings have a plurality of screw holes.
The pinch roll tuning apparatus for a steel strip according to claim 1, wherein the parling is inserted between the outer ring and the inner ring.

In the first or second apparatus, since it is configured to synchronize with the rack and the pinion, there is no functional deterioration due to wear and twist of the bush and the pin unlike the conventional link type, so that there is little failure. Also, even if the tuning function is deteriorated due to uneven wear of the left and right racks and the teeth of the pinion, the tuning shaft fastening means having one built-in pinion is loosened, the pinion is rotated, and the meshing state of the rack and the pinion teeth is achieved. After that, the function can be recovered in a short time by tightening the tuning shaft fastening means.

[0014]

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

FIG. 1 is a front view of a pinch roll provided with a tuning device according to the present invention, and FIG. 2 is a longitudinal sectional view of a pinion incorporating tuning shaft fastening means according to the present invention.

Reference numerals 11a and 11b denote hydraulic cylinders for raising and lowering the lower roll, 13 denotes an upper roll, and 14 denotes a lower roll. The upper roll 13 has bearing boxes 13a, 13b fixed to left and right housing guides 25a, 25b via springs.
It is pivoted on. Bearing box 14a, 1 of lower roll 14
4b is vertically movably engaged with the housing guides 25a and 25b.
a and 14b. Also, the bearing boxes 14a,
14b are attached to the left and right ends of the beam 16, respectively. The lower ends of the connecting rods 12a, 12b extending upward are connected to the left and right of the beam 16, and the upper ends thereof are connected to the rod ends of the hydraulic cylinders 11a, 11b for lifting using clevis 30, 30, respectively. Have been.
Attachment plates 34, 3 on the side surfaces of these clevises 30, 30
Racks 31, 31 extending in the vertical direction via 4 are attached. These racks 31, 31 are provided with an upper roll 1
3 above.

On the other hand, a tuning shaft 33 extending in the left-right direction is provided above the upper roll 13. This tuning axis 33 is
It is supported by bearings 32, 32 attached to the housing 25. Pinion 40, at the left and right end of tuning shaft 33,
40 are attached. These pinions 40, 40
One or both of them incorporate a tuning shaft fastening means 50 described later. The pinions 40, 40 are connected to the rack 31,
It meshes with 31.

Next, the tuning shaft fastening means 50 will be described. As shown in FIG. 2, the tuning shaft fastening means 50 includes an outer ring 51, an inner ring 52, and an outer ring 5.
1 and a first taper inserted between inner ring 52
It is composed of a ring 53, a second taper ring 54, and a plurality of bolts for fastening the first and second taper rings.

The outer ring 51 has a cylindrical surface on the outer periphery, and has a thick parallel portion at the center on the inner periphery, and the thickness increases linearly from the parallel portion toward the left and right ends. The slope surface becomes thinner. The outer periphery of the inner ring 52 has a thick parallel portion at the center, and a slope surface where the thickness decreases linearly from the parallel portion toward the left and right ends. It has a cylindrical surface.

The first taper ring 53 has a thicker end at one end and a thinner thickness at the other end, and its outer periphery has a slope that is equal to the slope of the inner periphery of the outer ring 51. , The inner circumference of which forms a slope surface equal to the slope surface of the outer circumference of the inner ring 52. Also, the first taper 53
Has a plurality of holes 53a penetrating from one end face to the other end face on the circumference at the center of the end face. The second taper ring 54 has the same inclined surface on the inner and outer circumferences as the first taper ring 53, and a screw penetrating from one end face to the other end face on the circumference of the center of the end face. It has a hole 54a.

The pinion 40 is attached via the tuning shaft fastening means 50 as follows.

First, a second taper ring 54 is assembled on one side of the inner ring 52, and then the outer taper 54 is mounted.
The ring 51 is mounted on the outer periphery of the second taper ring 54. The first taper ring 53 is incorporated into the other annular hole formed by the inner ring 52 and the outer ring 51, and the first taper ring is inserted into the screw hole 54a of the second taper ring 54. Align the 53 holes 53a. Bolt 5
5 is inserted through the hole 54 a of the first taper ring 53 and screwed into the screw hole 54 a of the second taper ring 54. As a result, the tuning shaft fastening means 50 enters a temporary assembled state.

Next, the tuning shaft fastening means 50 in a temporarily assembled state is assembled into a hole 41 formed in a boss portion of the pinion 40.
The inner diameter hole of the inner ring 52 is incorporated into the tuning shaft 33.
In this state, the pinion 40 is in a state where it can rotate around the tuning axis. When you turn the bolt 55 in the tightening direction,
The second taper ring 54 moves to the first taper ring 53 side, the outer diameter of the outer ring 51 expands due to the wedge effect, the inner diameter of the inner ring 52 decreases, and the pinion 4
0 is fixed to the tuning shaft 33. Conversely, after the bolt 55 is loosened, the bolt is screwed into a screw hole for removal of the first taper ring 53 (not shown) and tightened, so that the tip of the bolt is attached to the end face of the second taper ring 54. Hit, the first tea
The distance between the paring 53 and the second taper ring 54 increases, the outer diameter of the outer ring 51 decreases, the inner diameter of the inner ring 52 expands, and the pinion 40 rotates around the tuning axis. Ready to move.

The left and right bearing boxes 14a, 1 of the lower roll 14
4b is synchronized with the hydraulic cylinder 11a,
11b, the meshing state of one pinion 40 and the rack 31 is brought into contact with the pinion teeth 40a on the lower surface of the rack teeth 31a as shown in FIG.
The pinion is rotated by loosening the tuning shaft fastening means 50 of FIG. 4 and the pinion tooth 40a is changed to the rack tooth 31a as shown in FIG.
After that, the tuning shaft fastening means is fastened and fixed. This allows the right and left lifting hydraulic cylinder-1
The movement amounts of the rods 1a and 11b can be synchronized.

[0025]

According to the present invention, the following effects can be obtained.

(1) Since there is no reduction in the tuning function due to wear of the bush or pin and twisting of the link unlike the conventional link type, there is little failure.

(2) Even if the tuning function deteriorates due to uneven wear of the left and right racks and the teeth of the pinion, the function can be recovered in a short time by the tuning shaft fastening means.

(3) According to (1) and (2), it is possible to greatly suppress a decrease in the product yield of the steel strip.

[Brief description of the drawings]

FIG. 1 is a front view of a pinch roll provided with a tuning device according to the present invention.

FIG. 2 is a longitudinal sectional view of a pinion incorporating a tuning fastening means according to the present invention.

FIG. 3 is a side view showing an engagement state between one pinion and a rack according to the present invention.

FIG. 4 is a side view showing an engaged state of the other pinion and the rack according to the present invention.

FIG. 5 is a front view of a pinch roll provided with a conventional tuning device.

6 is a view as viewed in the direction of arrows AA in FIG. 5;

FIG. 7 is a view showing an example of installation of a pinch roll.

FIG. 8 is a view showing a one-side tightening state of the steel strip by vertical rolls.

FIG. 9 is a diagram showing a state in which a steel strip is partially tightened to cause cracks and wrinkles.

[Explanation of symbols]

 11a, 11b Hydraulic cylinder 13 Upper roll 13a, 13b Bearing box 14 Lower roll 16 Beam 25 Housing 25a, 25b Housing guide 30 Clevis 31 Rack 32 Bearing 33 Tuning shaft 40 Pinion 50 Tuning shaft fastening means 51 Outer -Ring 52 Inner ring 53 First taper ring 54 Second taper ring 55 Bolt 53a Hole 54a Screw hole

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shigenori Taniguchi 1-2-1 Marunouchi, Chiyoda-ku, Tokyo F-term of Nihon Kokan Co., Ltd. (reference) 4E026 AA02 AA15

Claims (2)

[Claims] 1. A tuning device for vertically moving a lower roll of a steel strip pinch roll by a pair of left and right connecting rods, comprising a pair of racks attached to each of the left and right connecting rods, and a tuning shaft. And a pair of pinions that mesh with the pair of racks, respectively, wherein the pinions have tuning shaft fastening means capable of adjusting the meshing between the teeth of the rack and the teeth of the pinion. Band pinch roll tuning device. 2. A method according to claim 1, wherein said tuning shaft fastening means comprises an outer ring having a gradient at an inner peripheral portion, an inner ring having a gradient at an outer peripheral portion, and a first taper ring having a gradient at an inner and outer periphery. A second taper having a gradient on the inner and outer circumferences,
The first tapering includes a plurality of fastening bolts, the first taper ring has a plurality of holes through which the fastening bolts pass, and the second taper includes a plurality of holes.
The steel according to claim 1, wherein the paring has a plurality of screw holes into which fastening bolts are screwed, and the first and second taperings are inserted between the outer ring and the inner ring. Band pinch roll tuning device.