JP2002336909A - Variable offset pinch roll device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable offset pinch roll device with which the generation of telescoping is prevented. SOLUTION: In the variable offset pinch roll device for a hot-rolling line wherein a strip is transported on an approximately horizontal strip line between an upper roll and a lower roll, and transporting directions to a plurality of coilers are switched, the lower roll is held in a fixed position, the upper roll is supported movably to the lower roll and a triangle gate apparatus is provided on the outlet side of the strip line. By constituting the triangle gate apparatus so as to have a driving means for moving its triangle gate plate to a set position, switching to each of front and rear coilers is surely enabled, the flutter of the strip is dissolved and defective coiling by the telescoping of the strip on each coiler is dissolved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable offset type pinch roll apparatus used in a hot rolling line or the like.

[0002]

2. Description of the Related Art In a case where a strip continuously rolled in a hot rolling line is alternately wound by two or more winders, a pinch roll for an upstream winder is set to a variable offset amount type so that the strip can be adjusted. Switching of the direction is performed. As a conventional example, an outline of a variable offset amount type pinch roll apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 8-281326, "Method of Switching Winding Machine Pinch Roll Transporting Direction", is shown in FIG. This will be described with reference to FIG. FIGS. 11 and 12 show the outline of the configuration near the rear of a hot rolling line provided with two winders, and are shown in a state where the left and right sides are reversed from those shown in JP-A-8-281326. .

In FIGS. 11 and 12, reference numeral 50 denotes a hot rolling line; 51, a strip; 52, a strip shear at the rear of the line; 53, a pinch roll device with a variable offset amount on the front side at the rear of the line; A front winder disposed below the output side of the roll device 53;
5 is a non-switchable pinch roll device on the rear side of the line.
Reference numeral 6 denotes a rear winder.

A prior art variable offset pinch roll apparatus 53 shown in FIGS. 11 and 12 includes a strip 51 between an upper (pinch) roll and a lower (pinch) roll.
Is transported on a substantially horizontal strip line, and the transport direction is switched to a front winder 54 and a rear winder 56.

[0005] Pinch roll device 53 with variable offset amount
The upper (pinch) roll 58 is held at a fixed position, is pressed down by a pressing-down device 57, and is rotationally driven by a rotation driving system (not shown), and is supported at a fixed height position by a horizontal cylinder 59 so as to be movable in a strip line direction. Bottom (pinch)
A roll 60, a triangular gate 61 fixed at a fixed position on the exit side of the strip line of the lower roll 60, and a strip 5
It comprises an auxiliary roller 63 and the like which is variably supported by a cylinder 62 for guiding the roller 1 downward.

The variable offset amount pinch roll device 53 determines the horizontal movement amount of the lower roll 60 based on the sheet thickness, sheet width, yield strength, and pinch roll pressing amount of the following material at the time of strip cutting. The bending curve of the following material when the material is caught between the upper roll 58 and the lower roll 60 is determined, and the lower roll 60 is adjusted so that the gap between the bending curve and the triangular gate becomes an allowable value.
Is controlled.

In FIG. 11, the lower roll 60 is moved by the cylinder 59 so that the leading end of the following material is moved horizontally just before the strip is cut from the state shown by the solid line during winding by the front winder 54 as shown by the broken line in the figure. By controlling the movement to the exit side, the distance between the triangular gate 61 and the lower roll 60 is reduced, and the strip 51 ′ of the following material is formed.
Is sent to the rear winder 56 as shown by the broken line in the figure.

On the other hand, in FIG. 12, from the state shown by the solid line during winding by the rear end winder 56, the lower roll is moved by the cylinder 59 so as to guide the leading end of the following material to the front winder 54 immediately before cutting the strip. The distance between the triangular gate 61 and the lower roll 60 is increased by moving the 60 to the entry side as shown by the broken line in the figure, and the strip 51 'of the following material is sent to the front winder 54 as shown by the broken line in the figure. It is a state to make it.

[0009]

However, as described above, the conventional offset amount variable pinch roll device 53 of the prior art is used.
Causes the lower roll 60 to swing when the lower roll 60 moves, and this swing is transmitted to the strip 51 (51 '), and the strip is shifted left and right on each of the winders 54 and 56,
There is a problem that winding failure easily occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide a variable offset type pinch roll apparatus which does not cause a winding deviation.

[0011]

Means for Solving the Problems (1) The present invention has been made to solve the above problems. As the first means, in a pinch roll apparatus with a variable offset amount of a hot rolling line that transports a strip between an upper roll and a lower roll on a substantially horizontal strip line and switches the transport direction to a plurality of winders. The lower roll is held in a fixed position, the upper roll is movably supported with respect to the lower roll, and a triangular gate device is provided on the exit side of the strip line, and the triangular gate device sets its triangular gate plate. A variable offset pinch roll device comprising a drive means for moving to a set position, the variable offset pinch roll device being provided.

According to the first means, in the continuous rolling of the strip, the switching of the offset position of the upper roll and the switching of the triangular gate device can be performed in advance before the strip is cut. The lower roll is held at a fixed position, eliminating the swing of the lower roll, eliminating flapping of the strip, and eliminating poor winding due to misalignment of the strip on each winding machine. Is done. (2) As a second means, in the pinch roll device of the variable offset amount of the first means, a pressure reduction device provided on the housing, a support frame incorporated in the housing and connected and supported at a lower portion of the pressure reduction device. A shaft box support frame fitted and supported slidably in the width direction of the strip line below the support frame, an upper roll bearing box movably supported in the strip line direction in a coaxial box support frame; The upper roll is horizontally moved along the strip line by horizontal moving means provided on the axle box support frame, the lower roll is supported at a fixed position in the housing, and the triangular gate device is driven by the driving means to form the triangular shape. A gate plate is attached to the housing so as to be moved along the strip line. Offset amount variable Pinchiro - providing Le device.

According to the above-mentioned second means, in addition to the function of the first means, it is possible to obtain a configuration in which the pinch-roll device of variable offset amount is integrated into the housing.

(3) As a third means, in the offset amount variable pinch roll device of the second means, the supporting frame and the axle box supporting frame are guided by the guide roller with respect to the housing. A variable offset amount pinch roll device characterized by being provided to move up and down.

According to the third means, in addition to the action of the second means, the support frame and the axle box support frame can be moved up and down by the screw-down device with small rolling resistance between the guide roller and the guide rail.

(4) As a fourth means, in the pinch roll apparatus with variable offset amount according to the second means, an upper roll supporting an end shaft portion of the upper roll adjacent to a shaft end side of the upper roll bearing box. A variable offset amount pinch roll device, comprising an auxiliary bearing box, and a lifting means capable of lifting the roll auxiliary bearing box and detaching the same from the housing.

According to the fourth means, in addition to the action of the second means, the push-up means constantly applies an overbalance force of about 20 to 30% of the weight of the upper roll upward to the upper roll auxiliary bearing box, and The load can be prevented from being applied as a rolling force, and the upper and lower gaps between the upper roll and the rolling device can be eliminated at once by pushing up the upper roll auxiliary bearing box by the lifting device, and the accuracy of the roll gap holding can be improved. It can be increased and the rolling force can be controlled to be small.

Further, the lifting means is separated from the upper roll auxiliary bearing box, and the shaft box support frame, the upper roll bearing box, and the upper roll auxiliary bearing box can be collectively pulled out and exchanged. The drawer can be replaced while the upper roll is pulled out.

(5) As a fifth means, in the offset amount variable pinch roll device according to any one of the second means to the fourth means, the driving means of the triangular gate device comprises a triangular gate of the triangular gate device. A variable offset amount type pinch roll comprising a vertical movement mechanism for positioning a plate above and below a pass line of the strip.
Provide a control device.

According to the fifth means, the second means to the fourth
In addition to the operation of any one of the above means, the switching of strip winding to a plurality of winders can be performed reliably and effectively during batch rolling in which strips of a fixed length are rolled at time intervals.

(6) As a sixth means, in the variable offset pinch roll apparatus of the first means, a pressure reduction device provided on a housing, a shaft incorporated in the housing and connected to and supported by the pressure reduction device. A box support frame, an upper roll bearing box movably supported in the strip line direction in the coaxial box support frame, wherein the upper roll is horizontally moved along the strip line by horizontal moving means provided on the housing. The lower roll is held in a fixed position in a housing, and the triangular gate device is attached to the housing such that the triangular gate plate is moved along the strip line by the driving means. Provided is a pinch-roll device having a variable offset amount.

According to the above-mentioned sixth means, in addition to the function of the first means, a configuration in which the pinch-roll device of variable offset amount is integrated into the housing is obtained, and the structure is simplified.

(7) As a seventh means, in the pinch roll apparatus with variable offset amount according to the sixth means, the upper roll supporting the end shaft portion of the upper roll adjacent to the shaft end side of the upper roll bearing box. A variable offset amount pinch roll device, comprising an auxiliary bearing box, and a lifting means capable of lifting the roll auxiliary bearing box and detaching the same from the housing.

According to the seventh means, in addition to the function of the sixth means, the push-up means always applies an overbalance force of about 20 to 30% of the weight of the upper roll upward to the upper roll auxiliary bearing box, The load can be prevented from being applied as a rolling force, and the upper and lower gaps between the upper roll and the rolling device can be eliminated at once by pushing up the upper roll auxiliary bearing box by the lifting device, and the accuracy of the roll gap holding can be improved. It can be increased and the rolling force can be controlled to be small.

Further, the lifting means is separated from the upper roll auxiliary bearing box, and the shaft box support frame, the upper roll bearing box and the upper roll auxiliary bearing box can be pulled out and replaced collectively. The drawer can be replaced with the upper roll pulled out.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A variable offset pinch roll apparatus according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an outline of the configuration near the rear of a hot rolling line equipped with a variable offset amount pinch roll device according to the present embodiment and two winders, and an explanatory view of the procedure of winding switching. FIG. 2 is an explanatory diagram of the procedure of the reverse winding switching of FIG.

FIG. 3 shows a modification of the pinch roll apparatus of the present invention, which has a variable offset amount, and shows a schematic configuration near the rear of a hot rolling line provided with two winding machines.
FIG. 4 is an explanatory view of the procedure of the winding switching reverse to that of FIG. 3.

FIG. 5 is a side view of a variable offset pinch roll apparatus according to the present embodiment, FIG. 6 is an explanatory view showing an axle box support frame shown in FIG. 5, and FIG.
8 is an explanatory view of the triangular gate device, FIG. 8 (a) is a view taken along the line BB in FIG. 7, and FIG. 8 (b) is a diagram C- in FIG.
(C) is a view on arrow DD in (a).

In FIGS. 1 to 8, the same elements as those shown in FIGS. 11 and 12 are denoted by the same reference numerals, and redundant description will be omitted. This also applies to other embodiments described later. The same shall apply.

In FIG. 1, reference numeral 10 denotes a pinch roll device of a variable offset amount for a front winder 54 of a hot rolling line 50 in the present embodiment, and 55 denotes a non-switchable pinch roll for a rear winder 56. The device 11 is a table roll disposed between the variable offset amount pinch roll device 10 and the non-switchable pinch roll 55.

Pinch roll apparatus 10 with variable offset amount
Is for transporting the strip 51 along a substantially horizontal strip line between the upper roll 13 and the lower roll 14, and switching the transport direction to the front winder 54 and the rear winder 56.

Variable Pinch Roll Apparatus 10
The upper roll 13 has a bearing box portion movably supported in the housing 12 up and down and along the strip line of the strip 51, and the lower roll 14 held at a fixed height and a fixed position and connected to a rotary drive system (not shown). A pressing device 15 for the upper roll 13; hydraulic cylinders 16 and 16 for horizontal movement provided as horizontal moving means for the upper roll 13; and a triangular gate plate along the strip line on the exit side of the strip line of the lower roll 14. Gate device 17 movably provided
And a triangular gate driving device 18 for moving the triangular gate plate of the triangular gate device 17, and a fixed guide plate 19 provided in a continuous arrangement at the lower surface position of the upper plate of the triangular gate plate.

When two or more winders are provided on the hot rolling line 50, only the pinch roll device for the last winder is a non-switchable pinch roll device 55, and the other front winder is used. The pinch roll devices for the machines are each configured as a variable offset amount pinch roll device 10.

In general, roll reduction control includes localization control for maintaining a constant roll gap, constant pressure control for maintaining a constant reduction force, and the like. In a pinch roll that changes the feeding direction of the strip, the upper roll has a weight of nearly 10 tons. To prevent meandering and winding deviation of the strip, it is effective to perform localization control and reduce the rolling force. For this reason,
Variable amount of pinch roll device 1 of the present embodiment
Numeral 0 denotes a configuration guided by a guide roller, and the resistance of the elevating unit is minimized as rolling friction at the time of pressure reduction.

As shown in FIGS. 5 to 7, in the variable offset amount pinch roll device 10, the pressing-down device 15 is provided at the upper center of the housing 12 with the pressing-down mounting pin 20 facing downward.
Supported by A support frame 21 incorporated in the housing 12 is supported at the center by a connecting pin 22 at the lower rod end of the lowering device 15.

An inverted T provided below the center of the support frame 21
The axle box support frame 23 is supported by loosely fitting the upper part of the mold fitting portion so as to be slidable in the strip line width direction. A downward hydraulic cylinder 24 for fixing the fitting portion is incorporated in the inverted T-shaped fitting portion of the support frame 21.

The support frame 21 is provided with two upper and lower guide rollers 25 projecting slightly from both sides to the sides. The axle box support frame 23 also has two
A guide roller 25 is similarly provided for each piece.

Support frame 21 and axle box support frame 23
Are supported on guide rails 12a provided on the inner side of the support portion of the housing 12 so as to engage with guide rollers 25 and move up and down.

On both sides of the axle box support frame 23,
A horizontal moving hydraulic cylinder 16 horizontally extending and contracting inward and downward by two at each side is provided as a horizontal moving means of the upper roll 13. In FIG. 5, X is a hydraulic cylinder 16 for horizontal movement.
Is the moving range of the center of the upper roll 13 due to the following.

The upper roll 13 has end shaft portions 13a at both ends thereof.
Is supported by an upper roll bearing box 26, and the shaft end side is supported by an upper roll auxiliary bearing box 27 adjacent to the outside. The lower roll 14 has end shaft portions 14a at both ends thereof.
Are normally supported in a lower fixed position on the housing 12 by one lower roll bearing box 28. A pair of upper roll balance cylinders 29 are provided as push-up means on the outer surfaces of the housing 12 on both sides of the lower roll bearing box 28 so as to push up the upper roll auxiliary bearing box 27.

The upper roll bearing box 26 is slidably supported in the axle box support frame 23 via a guide in a direction parallel to the strip line. The rod end of the horizontal movement hydraulic cylinder 16 is provided so as to be in contact with the concave portion on both side surfaces of the upper roll bearing box 26, and the upper roll bearing box 26 is driven by the left and right horizontal movement hydraulic cylinders 16 in the opposite direction synchronous drive. The inside of the support frame 23 is slid along the strip line to be switched to the set offset position.

A lower roll 14 is provided inside the lower portion of the housing 12.
Below the pass line L of the strip 51 on the outgoing side, there is provided a triangular gate device 17 which can be moved and adjusted in a direction parallel to the strip line. This triangular gate device 17
May be configured by adding a vertical movement mechanism as described later, but first, a substantially horizontal movement mechanism along a strip line will be described.

As shown in FIG. 8, the triangular gate device 17 is mounted on the housing 12 on both sides of the end shaft portion 14a at both ends of the lower roll 14, and is a pair of double horizontal type which expands and contracts in two steps in the strip line direction. A hydraulic cylinder 32, a pair of fixed guides 33 provided in parallel with the pass line L, a side plate 34 slidable on the fixed guide 33 by synchronous driving of the double horizontal hydraulic cylinder 32, and an integral portion between the side plates 34. A supported triangular gate plate 35 is provided. In this case, the double horizontal hydraulic cylinder 32 constitutes the triangular gate drive device 18 shown in FIG. In FIG. 8, Y is the range of movement of the rod end of the double horizontal hydraulic cylinder 32.

The double horizontal hydraulic cylinder 32 is shown in FIG.
As shown in (2), two cylinders are connected in series, and three fixed lengths can be easily obtained by expanding and contracting one side and then both sides in this order.

Further, a fixed guide plate 19 overlapping the lower part of the upper plate of the triangular gate plate 35 is also provided to be supported by the housing 12.

It should be noted that the triangular gate device 17 may be independently provided on a foundation, and the support structure and the horizontal slide mechanism of the upper roll bearing box 26 are not limited to those illustrated, but may be replaced by other appropriate methods. May be.

In the pinch roll apparatus 10 of variable offset amount according to the present embodiment described above, the lower roll 14
Holds the fixed position, and moves the upper roll 13 with respect to the lower roll 14 by operating the horizontal movement hydraulic cylinder 16 which is a pair of horizontal movement means, and the left offset position shown by a solid line in FIG. The position is switched to the right offset position shown by the solid line.

In parallel with this operation, the triangular gate device 17
The two-way horizontal cylinder 32 is expanded and contracted in the order of one side and both sides to move the triangular gate device 17 away from the lower roll 14 as shown by a broken line in FIG. The position is switched between the approached position and the intermediate position as shown by the broken line in FIG.

The upper roll balance cylinder 29 constantly applies an overbalance force of about 20 to 30% of the weight of the upper roll upward to the auxiliary bearing box 28 to lift and cancel the weight of the upper roll 13, and the load of the upper roll 13 is reduced. I try not to join as force.

The support frame 21 and the axle box support frame 23 can be moved up and down by the screw down device 15 with a small rolling resistance between the guide roller 25 and the guide rail 12a. For this reason, it is possible to control a small rolling force.

A procedure for switching the winding to the plurality of winding machines 54 and 56 by the variable offset amount pinch roll device 10 according to the present embodiment will be described with reference to FIGS.

FIG. 1 shows a state in which the winding of the strip 51 continuously hot-rolled in the hot rolling line 50 is switched from the front winding machine 54 to the rear winding machine 56. Prior to cutting the strip, the upper roll 1 is wound under the condition shown by the solid line where the strip 51 is wound by the front winder 54.
After switching 3 to the left offset position shown by the broken line, and moving the triangular gate device 17 to the intermediate position shown by the broken line,
Strip cutting is performed by a shear 52 (see FIG. 11) on the strip line.

In this operation, the cut preceding strip 51 is wound as it is on the lower front winder 54, and the trailing strip 51 'has a leading end slightly extending from the tangent between the upper roll 13 and the lower roll 14. It is sent out upward and horizontally moves on the triangular gate plate 35 of the triangular gate device 17 as shown by the broken line, and is switched to winding by the rear winder 56 via the non-switchable pinch roll 55 on the rear side.

FIG. 2 shows a state where the winding of the strip 51 is switched from the rear winder 56 to the front winder 54. Under the condition shown by the solid line where the strip 51 is wound by the rear winder 56, prior to the strip cutting, the upper roll 13 is switched to the right offset position shown by the broken line, and the triangular gate device 17 is separated by the broken line shown by the broken line. The strip 51 and cut the strip 51.

In this operation, the cut preceding strip 51 is wound as it is on the rear winder 56, and the leading end of the succeeding strip 51 ′ is obliquely downward from the tangent between the upper roll 13 and the lower roll 14. It is fed out as shown by a broken line below the triangular gate plate 35 of the triangular gate device 17 and is switched to winding by the front winder 54.

As shown in FIG. 1 and FIG. 2, in the continuous rolling of the strip 51, the trailing end of the cut preceding strip and the leading end of the succeeding strip are separated at a high speed with an interval of zero and the amount of variable offset pinch rolls. Reach 10 but
In this embodiment, since the switching of the offset position of the upper roll 13 and the switching of the triangular gate device 17 are performed in advance before cutting the strip, there is no time limit and the switching to the front and rear winders 54 and 56 can be reliably performed. become.

At the same time, since the lower roll 14 is held at a fixed position, the lower roll 14 does not oscillate, and the strip 51 (51 ') is brought into contact with the lower roll 14 which does not oscillate, and the strip 51 (51') is a pinch roll apparatus with a variable offset amount. From each winder 54, 5
6, the flapping of the strip 51 (51 ') is eliminated, and the strip 51 (51') on each of the winders 54, 56 is removed.
The winding failure due to the winding deviation of (51 ') is eliminated.

Further, since the fluttering of the strip 51 is eliminated, the auxiliary roller 63 (see FIGS. 11 and 12) for preventing fluttering which is conventionally required becomes unnecessary, and the installation of the triangular gate device 17 becomes easy.

FIGS. 3 and 4 show a modification of the present embodiment in which strips 51 having a fixed length are batch-rolled on a line.

In this case, the cutting of the strip 51 by the shear is not performed, and the rear end of the strip 51 to be wound by one winder 54 has a variable offset amount pinch roll 10.
, There is a time interval before the next strip 51 ′ enters the variable offset pinch roll 10,
During this time, the position of the upper roll 13 and the position of the triangular gate 17 may be switched.

For this reason, the triangular gate device 17 is sent to the pass line L (to the rear winder 56) by adding a vertical moving mechanism (not shown) in addition to the double horizontal cylinder 32 as the triangular gate driving device 18. Strips 51, 51 '
Not only the horizontal movement below) but also the switching of the triangular gate plate 35 to a position where the triangular gate plate 35 blocks the pass line L and a position below the pass line L over and under the pass line L. It becomes possible. It should be noted that a conventionally known mechanism can be appropriately used as the vertical movement mechanism itself.

FIG. 3 shows that after the winding of the fixed-length strip 51 on the front winder 54 is completed, the next fixed-length strip 51 ′ is switched to winding on the rear winder 56. Show the case. As shown by the solid line in the figure, the upper roll 13 is at the offset position to the right, and the triangular gate device 17 is the lower roll 1.
After the strip 51 is wound on the front winder 54 in a state where the strip 51 is switched to a height that blocks the pass line L at the closest position to 4, the upper roll 13 is released upward as shown by the broken line, and the triangular gate device 17 As shown by a broken line in the drawing, the position is switched to a position distant from the lower roll 14 and lower than the pass line L.

By this operation, the trailing strip 51 'of the next fixed length is moved downward without contacting the upper roll 13 of the pinch roll apparatus 10 with a variable offset amount.
4 and passes through the rear side non-switchable pinch roll device 55 in the horizontal direction, and is wound by a rear winder 56 as shown by a broken line.

FIG. 4 shows a strip 51 of a fixed length.
Is wound on the rear winder 56 and then switched to be wound on the front winder 54 side. As shown by the solid line in the drawing, the upper roll 13 is released above the offset position to the right, and the triangular gate device 17 is set at a position away from the lower roll 14 and at a height lower than the pass line L to the rear side. Winding by the winder 56 is performed. After the strip 51 has been wound on the rear winder 56, the upper roll 13 of the variable offset amount pinch roll device 10 is switched to the right offset position as shown by a broken line, and switched.
The triangular gate device 17 is switched to a height position where the pass line L is blocked at a position closest to the lower roll 14 as shown by a broken line.

In this operation, the trailing strip 51 'of the next fixed length is sent with its tip inclined downward at the tangent between the upper roll 13 and the lower roll 14, and the tip is horizontally warped upward. Is also blocked by the triangular gate device 17 and sent downwardly to be taken up by the front winder 54.

That is, the fixed length strip 51 (5
Also in the case of batch rolling in which 1 ′) is rolled at time intervals, a vertical moving mechanism is added to the triangular gate driving device 18 of the triangular gate device 17 in this way, and the triangular gate driving device 18 is moved to a plurality of winders 54 and 56. Can be reliably and effectively performed.

In the pinch roll apparatus 10 with variable offset amount according to the present embodiment described above, the upper roll balance cylinder 29 pushes up the upper roll auxiliary bearing box 27 so that the upper roll 13 and the upper surface of the upper roll bearing box 26 are brought into contact with each other. , The upper and lower gaps between the upper roll bearing box 26 and the axle box support frame 23, and the upper and lower gaps between the connecting pins 22 between the support frame 21 and the screw down device 15 are collectively eliminated.
, The accuracy of holding the roll gap can be increased, and the rolling force can be controlled to be small.

Also, the upper roll balance cylinder 29 is separated from the upper roll auxiliary bearing box 27, and the shaft box support frame 23, the upper roll bearing box 26, and the upper roll auxiliary Bearing box 2
8 can be collectively withdrawn and replaced.

The lower roll and the bearing box 28 are
Since the drawer 3 can be pulled out and replaced while pulled out, replacement and maintenance become easy.

Next, a variable offset type pinch roll device 10 according to a second embodiment of the present invention will be described with reference to FIGS. 9 is a side view of the variable offset amount pinch roll device of the present embodiment, and FIG.
It is an explanatory view showing the axle box support frame taken out,
(A) is one example, and (b) is another example.

The variable offset amount pinch roll apparatus 10 'of the present embodiment is the same as the first embodiment shown in FIGS.
In this embodiment, the support frame 21 in the variable offset amount pinch roll device 10 is omitted, and the axle box support frame 37 is directly connected to the lower portion of the pressing-down device 15 by pins. This is the same as in the first embodiment.

In FIGS. 9 and 10, reference numeral 37 denotes an axle box support frame which is incorporated in the housing 12 and is connected and supported by a connecting pin 38 at a rod end at a lower portion of the pressing-down device 15. The axle box support frame 37 is provided so as to slide up and down in contact with both sides of the sliding guide surface 12 a ′ of the housing 12 inward and vertically.

A horizontal through-opening 42 communicating with both side frames of the axle box support frame 37 and the two pillars of the housing 12 in contact therewith is provided, and is provided on the housing 12 as a means for moving the upper roll 13 horizontally. The rod ends of the horizontal movement hydraulic cylinders 16 ′, 16 ′ are inserted into the through-opening 42 with a gap therebetween and are in contact with both side surfaces of the upper roll bearing box 26. In FIG. 9, X 'is the range of movement of the center of the upper roll 13 by the horizontal movement hydraulic cylinder 16'.

As shown in FIG. 10, the axle box support frame 3
7 can be configured as a frame shape with a partially open lower part (FIG. 10 (a)) or a frame shape continuous with a square (FIG. 10 (b)).

Reference numeral 39 denotes a horizontal guide groove formed on the upper or lower side of the inner periphery of the axle box support frame 37, reference numeral 40 denotes an open portion of the guide groove 39 excluding both sides of the groove, and reference numeral 41 denotes the horizontal guide groove 39. It is a short ridge provided on the upper surface or the lower surface of the upper roll bearing box 26 so as to engage with the opening portion 40 at a predetermined position.

According to the pinch roll apparatus 10 ′ with variable amount of offset of the present embodiment described above, the pressing down apparatus 15 ′
The axle box support frame 37 is directly supported by the upper roll 13.
When the offset is changed and the gap is adjusted, both side surfaces of the axle box support frame 37 slide up and down on the upper and lower sliding guide surfaces 12a of the housing 12, and the offset of the upper roll 13 is switched by the horizontal movement provided on the housing 12. Since it can be performed by the hydraulic cylinders 16 ′ and 16 ′ for use, the structure of the pinch roll device 10 ′ with a variable offset amount becomes simple.

When pulling out the upper roll 13, the upper roll bearing box 26 is moved to the center position in the shaft box support frame 37,
When the upper or lower protruding ridge 41 is stopped in accordance with the opening 40 of the guide groove 39 and the horizontal movement hydraulic cylinder 16 ′ and the upper roll balance cylinder 29 are retracted, in this state, The upper roll 13, the upper roll bearing box 26, and the upper roll auxiliary bearing box 27 can be pulled out from the shaft box support frame 37 and exchanged.

The lower roll 14 and the lower roll bearing box 28 can be pulled out and replaced from the housing 12 with the upper roll 13 pulled out, and replacement and maintenance are easy.

In this embodiment, the operation and effect of the same configuration as that of the first embodiment can be achieved in the same manner as the operation and effect of the first embodiment.

The embodiments of the present invention have been described above.
The present invention is not limited to the above embodiment,
It goes without saying that various changes may be made to the specific structure within the scope of the present invention.

[0081]

(1) According to the first aspect of the present invention, the variable offset pinch roll device is used to transport a strip between an upper roll and a lower roll on a substantially horizontal strip line, and a plurality of winding machines. In the variable amount pinch roll apparatus of a hot rolling line for performing a transfer direction switching to the lower roll is held in a fixed position, the upper roll is movably supported with respect to the lower roll, the strip line of the A triangular gate device is provided on the exit side, and the triangular gate device has a variable offset type pinch roll device characterized by having driving means for moving the triangular gate plate to a set position. With such a configuration, switching of the upper roll offset position and switching of the triangular gate device in the continuous rolling of the strip are performed in advance before cutting the strip. Can be switched to each winder before and after, and the lower roll is held at a fixed position, so that the lower roll does not swing, eliminating the fluttering of the strip, and The winding failure caused by the winding deviation of the strip is eliminated. Further, an auxiliary roller or the like for preventing fluttering which has been required conventionally becomes unnecessary, and the configuration of the apparatus becomes simple.

(2) According to the invention of claim 2, claim 1
The variable offset amount pinch roll device described in the above, the pressing down device provided on the housing, a support frame incorporated in the housing and connected and supported at the lower portion of the lowering device, the width direction of the strip line at the lower portion of the supporting frame An axle box support frame slidably fitted to and supported by an upper roll bearing box movably supported in the same strip line direction in the coaxial box support frame, wherein the upper roll is provided on the axle box support frame. The lower roll is supported at a fixed position in the housing by the horizontal moving means, the lower roll is supported at a fixed position in the housing, and the driving means moves the triangular gate plate along the strip line. Claim 1 because it is configured to be attached to the housing.
In addition to the effects of the invention, a configuration in which the pinch-roll device with variable offset amount is integrated into the housing is obtained.

(3) According to the invention of claim 3, claim 2
Wherein the support frame and the axle box support frame are provided so as to be moved up and down by being guided by the guide rollers with respect to the housing. In addition to the effects of the invention of item 2, since the support frame and the axle box support frame can be moved up and down by the screw-down device with small rolling resistance between the guide roller and the guide rail, it is possible to control a small screw-down force. .

(4) According to the invention of claim 4, claim 2
The variable offset amount pinch roll device according to the above, further comprising an upper roll auxiliary bearing box that supports an end shaft portion of the upper roll adjacent to the shaft end side of the upper roll bearing box, and the upper roll auxiliary bearing on the housing. Since the lifting means capable of lifting and releasing the bearing box is provided, the lifting means always provides an overbalance force of about 20 to 30% of the weight of the upper roll in addition to the effect of the invention of claim 2. The upper roll load can be prevented from being applied upward as well as the upper roll auxiliary bearing box in addition to the upper roll auxiliary bearing box. The roll gap can be eliminated at once, the accuracy of maintaining the roll gap can be improved, and the rolling force can be controlled to be small.

Further, the lifting means is separated from the upper roll auxiliary bearing box, and the shaft box support frame, the upper roll bearing box, and the upper roll auxiliary bearing box can be pulled out and replaced collectively. The drawer can be replaced while the upper roll is pulled out, which facilitates replacement and maintenance.

(5) According to the invention of claim 5, claim 2
5. The up-and-down moving mechanism according to claim 4, wherein the driving unit of the triangular gate device moves the triangular gate plate of the triangular gate device over and under a pass line of the strip. 6. In addition to the effects of any one of claims 2 to 4, in addition to the effects of claims 2 to 4, during batch rolling in which a fixed length strip is rolled at time intervals,
The switching of strip winding to a plurality of winding machines can be performed reliably and effectively.

(6) According to the invention of claim 6, claim 1
In the variable offset amount pinch roll device described in the above, the pressing down device provided on the housing, the shaft box support frame incorporated in the housing and connected and supported by the same pressing down device, the strip line direction in the coaxial box support frame An upper roll bearing box movably supported by the upper roll is horizontally moved along the strip line by horizontal moving means provided on the housing, the lower roll is held in a fixed position in the housing, The triangular gate device is configured to be mounted on the housing so that the triangular gate plate is moved along the strip line by the driving means. A structure in which the pinch roll device is integrated into the housing is obtained, and the structure is simplified. That.

(7) According to the invention of claim 7, claim 6
The variable offset amount pinch roll device according to the above, further comprising an upper roll auxiliary bearing box that supports an end shaft portion of the upper roll adjacent to the shaft end side of the upper roll bearing box, and the upper roll auxiliary bearing on the housing. Since the lifting means capable of lifting and releasing the bearing box is provided, in addition to the effect of claim 6, the lifting means is more than 20 weights from the upper roll weight.
An over-balancing force of about 30% is always applied upward to the upper roll auxiliary bearing box so that the upper roll load is not applied as a rolling force. Upper and lower gaps up to the rolling-down device can be eliminated in a lump, the accuracy of roll gap holding can be improved, and the rolling-down force can be controlled to be small.

Also, the lifting means is separated from the upper roll auxiliary bearing box, and the shaft box support frame, the upper roll bearing box and the upper roll auxiliary bearing box can be pulled out and replaced collectively. The drawer can be replaced while the upper roll is pulled out, which facilitates replacement and maintenance.

[Brief description of the drawings]

FIG. 1 is a schematic view of the configuration near the rear of a hot rolling line provided with a variable offset type pinch roll device according to a first embodiment of the present invention and provided with two winders, and a winding switchover. It is explanatory drawing of the point.

FIG. 2 is an explanatory diagram of a procedure of reverse winding switching of FIG. 1;

FIG. 3 is a schematic diagram of a configuration near a rear part of a hot rolling line provided with a modified example of the variable offset amount pinch roll device according to the first embodiment of the present invention and provided with two winders; It is explanatory drawing of the point of winding switching.

FIG. 4 is an explanatory diagram of a procedure of reverse winding switching of FIG. 3;

FIG. 5 is a side view of the variable offset pinch roll device according to the first embodiment of the present invention.

FIG. 6 is an explanatory view showing the axle box support frame in FIG. 5 taken out therefrom.

FIG. 7 is a view taken in the direction of arrows AA in FIG. 5;

8 is an explanatory diagram of the triangular gate device in FIG. 5,
7A is a view taken in the direction of the arrow B-B in FIG. 7, and FIG.
(C) is a view taken in the direction of the arrow DD in (a).

FIG. 9 is a side view of a variable offset amount pinch roll device according to a second embodiment of the present invention.

10 is an explanatory view showing the axle box support frame in FIG. 9 taken out, in which (a) is one example and (b) is another example.

FIG. 11 is a schematic configuration diagram of the vicinity of the rear part of a hot rolling line equipped with a conventional technology of a variable offset amount pinch roll device and provided with two winding machines, and is an explanatory diagram of a winding switching procedure. .

FIG. 12 is an explanatory diagram of a procedure of reverse winding switching of FIG. 11;

[Explanation of symbols]

10, 10 'Pinch roll device with variable offset amount 11 Table roll 12 Housing 12a Guide rail 12a' Sliding guide surface 13 Upper roll 14 Lower roll 15 Press-down device 16, 16 'Hydraulic cylinder for horizontal movement 17 Triangular gate device 18 Triangular gate drive Apparatus 19 Fixed guide plate 20 Press-down mounting pin 21 Support frame 22 Connecting pin 23 Shaft box support frame 24 Downward hydraulic cylinder 25 Guide roller 26 Upper roll bearing box 27 Upper roll auxiliary bearing box 28 Lower roll bearing box 29 Upper roll balance cylinder 37 Shaft Box support frame 38 Connecting pin 39 Horizontal guide groove 40 Opening part 41 Ridge part 42 Through opening 50 Hot rolling line 51, 51 'Strip 54 Front winder 55 Non-switchable pinch roll device 56 Rear winder

Continued on the front page (72) Inventor Hiroyuki Taniguchi 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Hiroshi Matsuoka 4-6-22 Kanon Shinmachi, Nishi-ku, Hiroshima City Mitsubishi Heavy Industries, Ltd. F term in Hiroshima Manufacturing Co., Ltd. (reference) 4E026 AA05 GA03 GA08 GA10

Claims (7)

[Claims] 1. A hot-rolling line variable offset pinch roll device for transporting a strip between an upper roll and a lower roll on a substantially horizontal strip line and switching a transport direction to a plurality of winders, The lower roll is held in a fixed position, the upper roll is movably supported with respect to the lower roll, and a triangular gate device is provided on the outlet side of the strip line, and the triangular gate device has its triangular gate plate set. A variable offset amount pinch roll device comprising a driving means for moving to a position. 2. The variable offset pinch roll device according to claim 1, wherein the pressure reduction device provided on the housing, a support frame incorporated in the housing and connected and supported at a lower portion of the pressure reduction device, and the support frame. At the lower part, a shaft box support frame fitted and supported slidably in the width direction of the strip line, an upper roll bearing box movably supported in the same strip line direction in a coaxial box support frame, wherein the upper roll is Horizontally moving along the strip line by horizontal moving means provided on the axle box support frame, the lower roll is supported at a fixed position in the housing, and the triangular gate device is configured so that the triangular gate plate is driven by the driving means. An offset mounted on said housing for movement along a stripline. Variable amount pinch roll device. 3. The variable offset amount pinch roll device according to claim 2, wherein the support frame and the axle box support frame are provided to move up and down while being guided by a guide roller with respect to the housing. A variable offset pinch roll device, characterized in that: 4. The pinch roll apparatus according to claim 2, further comprising an upper roll auxiliary bearing box for supporting an end shaft portion of the upper roll adjacent to a shaft end of the upper roll bearing box. A pinch-roll device with a variable offset amount, wherein a lifting device capable of lifting and detaching the roll assist bearing box is provided on the housing. 5. The variable offset pinch roll device according to claim 2, wherein the driving means of the triangular gate device includes a triangular gate plate of the triangular gate device and a pass line of the strip. A pinch-roll device having a variable offset amount, comprising a vertical movement mechanism positioned vertically. 6. The pinch roll device according to claim 1, wherein the pressure reduction device is provided on the housing, the axle box support frame is incorporated in the housing and is connected and supported at a lower portion of the pressure reduction device. An upper roll bearing box movably supported in the strip line direction in a box support frame, wherein the upper roll is horizontally moved along the strip line by horizontal moving means provided on the housing, and the lower roll is The triangular gate device is supported on a fixed position in the housing, and the triangular gate device is attached to the housing such that the triangular gate plate is moved along the strip line by the driving means. Device. 7. The variable offset amount pinch roll device according to claim 6, further comprising an upper roll auxiliary bearing box that supports an end shaft portion of the upper roll adjacent to a shaft end side of the upper roll bearing box. A pinch-roll device with a variable offset amount, wherein a lifting device capable of lifting and detaching the roll assist bearing box is provided on the housing.