JP2004216427A - Quick open mechanism of work roll in leveler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a quick open mechanism which can lift upper work rolls instantly and in a large distance without deterioration of functions of a conventional leveler. <P>SOLUTION: The quick open mechanism Q is arranged on a lower work roll frame 15 installed on a base frame 11 and its right and left sides, and is comprised of stands 20, 22, a slider 30 arranged movable slidingly in the vertical direction along the stands 20, 22, and a hydraulic cylinder 28 to vertically drive the slider. Under the slider 30, a tapered wedge structure 36 to adjust a reduction amount individually on the upstream side and the downstream side, the upper work roll frame 32 hung via the structure 36, and a synchronizing mechanism 53 to synchronize the vertical motion in the front and rear ends and in the right and left ends of the slider 30 are equipped. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement of a leveler used in a press working line, a coil material production line, and the like, and particularly to a work roll quick opening device suitable for a relatively large leveler.
[0002]
[Prior art]
When performing leveling to correct the winding habit of a coil material in a leveler (leveler feeder), between several upper work rolls and several lower work rolls arranged in a gap between the upper work rolls, Pass a band-shaped work (hoop material) unwound from the coil. The gap between the upper work roll and the lower work roll is usually adjusted to a minus side (called a reduction amount) from the work thickness. Therefore, the material passes between the upper work roll and the lower work roll in a staggered manner. The reduction amount is large on the upstream side, and is reduced toward the downstream side. Then, the roll gap at the most downstream is set to be approximately the same as the thickness of the work (the amount of reduction is zero). Thereby, the material is gradually flattened.
[0003]
The lowering amount of the upper work roll is adjusted by separately adjusting the height on the upstream side and the downstream side of the upper work roll frame that holds the entire upper work roll. The method of adjusting the amount of reduction of the upper work roll is to support the pressurizing reaction force of the material, and to enable fine adjustment, for example, using a worm gear and screw, a mechanism that raises and lowers the female screw member with a screw, or a screw This is performed by a mechanism that moves the taper wedge.
[0004]
However, in a leveler using such a mechanism, since only a small amount can be opened between the upper and lower work rolls, it is extremely inconvenient when inspecting and cleaning the work rolls. Further, the mechanism using the worm gear and the screw can take a large reduction stroke in order to open it wide, but in such a case, it takes a long time to lift the upper work roll. Further, with respect to the tapered wedge, the vertical stroke cannot be made large because of the mechanism.
[0005]
On the other hand, in a conventional leveler, a lower pinch roll, a lower work roll, and a clamp roll are held by an integral frame (for example, a lower portion of a stand). Therefore, when the lower work roll is damaged and the maintenance is performed, it is necessary to disassemble the entire leveler and reassemble after the maintenance.
[0006]
[Problems to be solved by the invention]
The present invention is to provide a quick open device for a leveler that can quickly and greatly raise an upper work roll without impairing the function of the conventional leveler, and facilitates maintenance of upper and lower work rolls. It is an issue. A further object of the present invention is to provide a quick-open device (independent frame structure) in which the lower work roll can be easily disassembled.
[0007]
[Means for Solving the Problems]
The quick open device of the present invention (Claim 1) is capable of individually adjusting the height of a lower work roll frame provided on a base frame on the upper side of the lower work roll frame on the upstream side and the downstream side of the work flow. A work roll quick-opening device in a leveler having an upper work roll frame attached to a stand, the stand being erected on the base frame, and a slider slidably provided up and down with respect to the stand. And a drive unit for driving the slider up and down, wherein the upper work roll frame is attached to the lower portion of the slider so that the height of the upper work roll frame can be individually adjusted on the upstream side and the downstream side.
[0008]
In such a quick-open device, a guide bar is provided on the slider in the vertical direction, one surface of the guide bar is in sliding contact with the stand, and the other surface is on the upper work roll frame and the left and right sides of the upper work roll frame. It is preferable that the sliding contact is made so as to allow the inclination (claim 2). Further, the stands are provided at positions corresponding to the four corners of the upper work roll frame, and the driving means has a cylinder for driving the slider up and down near its center, and synchronizes the lifting and lowering of the four corners of the slider. It is preferable to provide a tuning mechanism for performing the adjustment (claim 3). The tuning mechanism is preferably composed of a pinion provided to rotate in synchronization with each stand, and a rack provided on the slider so as to mesh with the corresponding pinion. Preferably, the lower work roll frame is attached to the base frame independently of the stand (claim 5).
[0009]
[Action and effect of the invention]
According to the quick opening device of the present invention (claim 1), the upper work roll frame is attached to the slider so that the height can be individually adjusted on the upstream side and the downstream side, and the slider is moved up and down. The work roll can be raised and lowered while maintaining the adjusted rolling amount on the downstream side. That is, the amount of reduction of the upper work roll is strong at the entrance side and about zero (the gap is about the plate thickness) at the exit side. Therefore, the upper work roll frame is in an inclined state. Since the upper work roll is quick-opened and returned as it is, there is no need to re-adjust the reduction amount when returning to the original position. Therefore, maintenance of the upper work roll can be easily performed in a short time.
[0010]
In the quick opening device, a guide bar is provided on the slider in a vertical direction, one surface of the guide bar is in sliding contact with the stand, and the other surface is on the upper work roll frame, and the left and right inclinations of the upper work roll frame are provided. In the case where the sliding contact is made so as to allow the above (claim 2), the guide of the slider with respect to the stand and the guide of the upper work roll frame with respect to the slider can be used with one guide bar. That is, the slider moves straight up and down at the time of the open operation, but the adjustment of the amount of reduction of the upper work roll is a movement of inclining the upper work roll frame. However, the adjustment of the rolling amount is a slight height adjustment, and the left and right ends can be regarded as almost vertical movement. Therefore, the guide is guided up and down so as to allow the left and right inclination when adjusting the rolling reduction, so that both guides are performed by a common guide bar. As a result, the number of parts is reduced and the number of assembly steps is reduced. Further, when the slider is moved up and down, the slider and the upper work roll frame do not move relative to each other and move up and down in an integrated state, so that the amount of reduction in the adjusted state is accurately maintained.
[0011]
The stands are provided at positions corresponding to the four corners of the upper work roll frame, and the driving means has a cylinder for driving the slider up and down near its center, and synchronizes the lifting and lowering of the four corners of the slider. In the case of the quick open device having the tuning mechanism (claim 3), the slide can be smoothly moved up and down with a simple configuration. In other words, when a plurality of cylinders are involved in the up-and-down operation, if the cylinders are not driven in synchronization with each other, a warp occurs, but such tuning control is considerably complicated and difficult. On the other hand, when the number of cylinders is one, no tuning mechanism is required. However, unless the length of the guide is set to about three times the interval between the guide surfaces and the rigidity of the guide is increased, a slip or a stick-slip occurs, and the guide cannot be moved up and down smoothly. Thus, by combining a cylinder that drives the vicinity of the center and a tuning mechanism that synchronizes the four corners of the slider, the generation of “swelling” is suppressed even if the guide is short, and control is facilitated. Note that “around the center” here includes both the vicinity of the center in the left-right direction of the slider and the vicinity of the center in the front-rear direction.
[0012]
When the tuning mechanism comprises a pinion provided so as to rotate in synchronization with each stand, and a rack provided on the slider so as to mesh with the corresponding pinion (claim 4), for example, the 4 If the vertical movement of the corner is faster than the other parts, the rack at that corner moves faster, the movement of the pinion meshing with that rack is transmitted to the pinion at the other corner, and the rack at the other corner is driven in the same direction At the same time, the fastest corner movement is suppressed. As a result, the movements of the entire corners are synchronized, and the occurrence of "abortion" is suppressed. In addition, each pinion does not require a driving means such as a motor, and the pinions are driven so as to be synchronized with each other.
[0013]
In the quick open device in which the lower work roll frame is attached to the base frame independently of the stand (claim 5), after the upper work roll frame is quick opened, the lower work roll frame can be removed from the leveler. Therefore, maintenance work such as repairing a scratch on the lower work roll or exchanging the work roll becomes easy without dismantling other parts. After maintenance, the lower work roll frame may be attached to the original state, and the upper work roll may be returned. In that case, the reproduction adjustment of the upper work roll is unnecessary.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the quick open device of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an embodiment of a leveler provided with the quick-open device of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a front view of the quick-open device of the leveler, FIG. FIG. 5 is a side view of the quick opening device, FIG. 5 is an exploded perspective view of a main part of the quick opening device, and FIG. 6 is a plan view showing an embodiment of a tuning mechanism according to the present invention.
[0015]
A leveler 10 shown in FIG. 1 includes a base frame 11, a pinch roll portion A provided with upper and lower pinch rolls 12 and 13 provided on the base frame, and a top and bottom provided on the downstream side (the left side in FIG. 1). And a clamp roll C provided with upper and lower clamp rolls 16 and 17 provided downstream thereof. Reference numeral 18 denotes a stand for rotatably supporting each of the lower rolls 13, 15, and 17 of the roll group, and reference numeral 19 denotes a guide for guiding both side edges of the incoming work to prevent meandering. It is a material side guide. The flow direction of the work is the direction of the arrow W. In the following description, the front side is referred to as “front”, the back side is referred to as “back”, the upstream side of the work flow is referred to as “right”, and the downstream side is referred to as “left” with reference to the front view of FIG.
[0016]
The stand 18 includes a first stand (lower pinch roll frame) 20 that supports the lower pinch roll 13, a lower work roll frame 21 that supports the lower work roll 15, and a second stand 22 that supports the lower clamp roll 17. Divided into In a conventional leveler, these are integrated, but in this embodiment, they are divided into three parts. Therefore, after raising the upper work roll 14 with a quick open device described later, the first stand 20 and the second stand 22 supporting the upper work roll group are left as they are, and only the lower work roll frame 21 is used as the base frame. 11 can be removed. Therefore, maintenance of the lower work roll 15 is easy. As shown in FIG. 2, the stand 18 is attached to the base frame 11 as a pair in front and back, and rotatably supports both ends of each lower roll.
[0017]
As shown in FIG. 1, the pinch roll portion A includes a first stand 20 having a substantially U shape, an upper pinch roll frame 23 slidably housed vertically in a gap therebetween, The lower pinch roll 13 whose both ends are rotatably supported by the stand 20, the upper pinch roll 12 whose both ends are rotatably supported by the front and rear upper pinch roll frames 23, and the upper end of the front and rear first stands 20. And a cylinder 24 for supporting the front and rear upper pinch roll frames 23 respectively.
[0018]
Normally, an air cylinder is used as the cylinder 24, and the upper end of the upper pinch roll frame 23 is connected to the tip of the piston rod 24a. Thereby, the front and rear upper pinch roll frames 23 can be driven up and down by the cylinder 24, and the work can be pressed between the upper and lower pinch rolls 12 and 13 by being pressed downward by the cylinder 24. The upper and lower pinch rolls 12, 13 are driven by the same motor that drives the work rolls 14, 15 via a gear box and a universal joint (see FIG. 2 for work rolls). However, since there is a difference in the roll diameter between the work roll and the pinch roll, the gears are shifted and the material is fed at the same roll peripheral speed.
[0019]
The clamp roll section C is rotatably supported by a second stand 22 before and after rotatably supporting both ends of the lower clamp roll 17 and an upper clamp roll frame (not shown), and is brought into contact with the lower clamp roll 17. And an upper clamp roll 16. The upper clamp roll frame is movable up and down with respect to the second stand 22, so that the upper clamp roll 16 moves between the raised open position and the lowered clamp position. The lower clamp roll 17 is driven by being connected to the exit roll of the lower work roll by a chain. The upper clamp roll is not driven.
[0020]
The work roll portion B includes a rising portion 20a on the left side of the first stand 20, a rising portion 22a of the second stand 22, right and left columns 26 erected on them, and upper ends of the columns 26. An upper frame 27 attached to the upper frame, a hydraulic cylinder 28 provided before and after the upper frame, and a slider suspended above the hydraulic cylinder and slidably held between the left and right rising portions 20a and 22a (upper slider) A tapered wedge frame) 30 and an upper work roll frame 32 suspended from the slider. The slider 30 which suspends the upper work roll frame 32 and can move up and down with respect to the stand and the hydraulic cylinder 28 which drives the slider 30 up and down constitute a quick open device Q. As shown in FIG. 2, the columns 26 and the hydraulic cylinders 28 are provided as a pair in front and rear, similarly to the stand. Further, the front and rear ends of the slider 30 are suspended so that the hydraulic cylinder 28 is positioned as directly above the guide as possible.
[0021]
As shown in detail in FIG. 3, a slider 30 is suspended via a pin joint 28b at the tip of a piston rod 28a of the front and rear hydraulic cylinders 28. The slider 30 is vertically slidably guided by the front and rear first stands 20 and the front and rear second stands 22. Therefore, by driving the hydraulic cylinder 28 up and down, the slider 30 can be moved up and down. The right side of FIGS. 3 and 4 shows a state where the slider 30 is raised.
[0022]
As shown in FIG. 5, the slider 30 has a front plate 30a, a rear plate 30b, an upper plate (upper tapered wedge frame) 30c connecting the upper ends thereof, and their rigidity. And a beam member 30d for ensuring the connection between the two. Guide bars 31 extending vertically are fixed to the left and right ends of the front plate 30a and the rear plate 30b, respectively. The piston rod of the hydraulic cylinder 28 is attached to the upper surface of the front and rear ends of the beam member 30d by a pin joint 28b. An outer guide groove 31a is formed on the outer surface of the guide bar 31, and fits slidably up and down with a ridge provided on the inner surface of the stands 20 and 22 (see FIG. 6). Further, an inner guide groove 31b for slidably guiding the upper work roll frame 32 up and down is formed on the inner surface of the guide bar 31.
[0023]
The upper work roll frame 32 includes a front plate 32a, a rear plate 32b, and an upper plate (lower tapered wedge frame) 32c connecting the upper ends thereof. The front plate 32a and the rear plate 32b rotatably support both ends of the upper work roll 14 described above. Left and right ends (guide portions 47) of the front plate 32a and the rear plate 32b are fitted into the inner guide groove 31b of the guide bar 31 so as to be slidable up and down. When such a guide bar 31 is used, both the outside and the inside can be guided by one guide bar 31, so that the number of parts can be reduced.
[0024]
Further, when adjusting the position of the upper work roll frame 32 with respect to the slider 30, that is, the amount of reduction, the inner work of the guide bar 31 fixed to the slider 30 guides the elevation of the upper work roll frame 32. Therefore, at the time of quick open in which the entire slider 30 is moved up and down by the hydraulic cylinder 28, the upper work roll frame 32 moves up and down integrally with the slider 30, and there is no relative movement. Therefore, the delicate adjustment of the amount of reduction does not get out of order before and after the slider 30 moves up and down. The first stand 20 and the second stand 22 receive the guide reaction force of the upper work roll frame 32 via the guide bar 31.
[0025]
Next, the mounting state of the slider 30 and the upper work roll frame 32 will be described. As shown in FIGS. 2 and 4, the upper work roll frame 32 is suspended from the slider 30 via a number of suspension rods (spring shafts) 33 and springs 34. That is, each suspension rod 33 is vertically arranged through the upper plate 30c and the beam member 30d of the slider 30, and between the stopper plate 33a such as a nut screwed to the upper end thereof and the upper plate 30c of the slider 30. A spring 34 is interposed. In this embodiment, the spring 34 is a compression coil spring and is arranged so as to surround the suspension rod 33.
[0026]
A lower portion of the suspension rod 33 extending below the slider 30 penetrates the upper plate 32c of the upper work roll frame 32, and a lower end thereof has a stop member such as a nut engaged with a lower surface of the upper plate 32c of the upper work roll frame 32. 33b is attached. The stop member 33a at the upper end of the suspension rod 33 is preferably a double nut so that the amount of compression of the spring 34 can be adjusted and not loosened. Similarly, it is preferable that the lower end stop member 33b is also a double nut. By the hanging rod 33 and the spring 34, the upper work roll frame 32 supports its own weight and is constantly urged upward.
[0027]
Next, the taper wedge mechanism 36 will be described with reference to FIGS. As shown in FIG. 4, a taper wedge mechanism 36 for finely adjusting the height of the upper work roll frame 32 with respect to the slider 30 is interposed between the upper work roll frame 32 and the slider 30. The taper wedge mechanism 36 is for finely adjusting the height of the upper work roll frame 32. The lower taper wedges 37, 38 attached to the front, rear, left and right of the upper plate 32c of the upper work roll frame 32, Upper taper wedges 39 and 40 provided on the lower surface of the slider 30 so as to be slidable back and forth so as to slide with the taper wedge, and a feed screw 41 screwed with a female screw formed on the upper taper wedges 39 and 40. (See FIG. 5).
[0028]
The feed screws 41 are, for example, right-hand screws on the front side (left side in FIG. 4) and opposite screws such as left-hand screws on the rear side, and are connected to each other by a coupling 42 as shown in FIG. I have. Both ends of the feed screw 41 are rotatably supported by bearings 43 attached to the lower surface of the slider 30. As shown in FIG. 2, a motor M with a speed reducer is connected via a coupling 44 to a rear end (an end on the rear side as viewed in FIG. 1). The motor M is attached to the rear plate 30b of the slider 30 by a bracket 45.
[0029]
In this taper wedge mechanism 36, when the motor M rotates in one direction and the feed screw 41 rotates in one direction, the front upper taper wedge 39 moves backward, and the rear upper taper wedge 40 moves forward. As a result, both upper tapered wedges 39 and 40 approach each other. Thereby, the interval between the slider 30 and the upper work roll frame 32 is increased. As a result, the amount of reduction of the upper work roll 14 increases. When the motor M rotates in the reverse direction, the upper tapered wedges 39 and 40 move away from each other, and the interval between the slider 30 and the upper work roll frame 32 becomes narrower. As a result, the amount of reduction is reduced. The suspension structure using the spring 34 and the suspension rod 33 has a function of constantly urging the upper work roll frame 32 upward and following the change in the distance between the slider 30 and the upper work roll frame 32. Thus, even when the rolling amount is changed, the tapered wedges can follow each other so that no gap is generated.
[0030]
As can be seen from FIG. 3 or FIG. 5, the taper wedge mechanism 36 is provided independently on the upstream side and the downstream side in the work flow direction. Therefore, the distance between the slider 30 and the upper work roll frame 32 can be adjusted independently and independently, and work leveling work can be performed. If the amount of reduction on the upstream side and that on the downstream side are different, the upper work roll frame 32 is in an inclined state. For example, the amount of reduction of the upper work roll 14 is usually large on the entrance side, and small on the exit side. In order to allow such an inclined state, as shown in FIG. 3, the guide portions 47 provided at the left and right ends of the front plate 32a of the upper work roll frame 32 are provided at the center of the work roll located at the center of the upper work roll frame. Are formed in an arc shape centered at. The radius of curvature of the arc of the guide portion 47 is the width between the upstream and downstream ends. The same applies to the rear plate (reference numeral 32b in FIG. 4). The guide portion 47 is fitted into the inner guide groove (31b in FIG. 6) of the guide bar 31 described above.
[0031]
The operation and effect of the taper wedge mechanism 36 in FIG. 4 are substantially the same as those of the mechanism used in the conventional leveler. However, in the conventional leveler, the upper tapered wedges 39 and 40 are attached to the upper plate fixed to the upper end of the stand, and the upper work roll frame 32 is hung. , 40 are attached to the slider 30 and the upper work roll frame 32 is suspended. Thus, when the slider 30 and the upper work roll frame 32 move up and down in response to the raising and lowering operation of the hydraulic cylinder 28, it is possible to move up and down while maintaining the state of adjustment of the amount of reduction of the upper work roll 14.
[0032]
Further, as shown in FIG. 2, the rear end of each upper work roll 14 is connected to an upper output shaft 50 of a gear box 49 via a universal joint 48. Similarly, the rear end of each lower work roll 15 is connected to the lower output shaft 52 of the gear box 49 via a universal joint 51. The gear box 49 includes an input shaft 49a connected to a drive motor in the base frame 11 by a belt, and a gear train interposed between the input shaft and the two output shafts 50 and 52. I have. The output shafts 50 and 52 are configured to rotate in opposite directions.
[0033]
The upper universal joint 48 is made considerably long not only to adjust the amount of reduction of the upper work roll frame 32 by the taper wedge mechanism 36 but also to raise and lower the entire slider 30 by the hydraulic cylinder 28. The lower universal joint 51 is aligned with the upper universal joint 48.
[0034]
Next, with reference to FIGS. 5 and 6, a tuning mechanism for moving the slider up and down will be described. As shown in FIG. 5, in this embodiment, the slider 30 is suspended by the hydraulic cylinder 28 at the front and rear two places, and the vertical movement is guided at the front, rear, left and right ends. In addition, when the expansion / contraction speeds of the front and rear hydraulic cylinders 28 do not match, or due to an imbalance in the weight of the slider 30 or an imbalance in the resistance of lifting / lowering, there is a possibility that a warp may occur at the left / right front and rear ends of the slider 30 during lifting / lowering. Such a tuning mechanism 53 synchronizes the vertical movement speed of the slider 30 in the front-rear and left-right directions to prevent the occurrence of such warping.
[0035]
As shown in FIG. 5, the tuning mechanism 53 includes a first tuning rod 55 rotatably supported by bearings 54 provided on the front sides of the first stand 20 and the second stand 22, respectively. A second tuning rod 56 is provided rotatably between them, and a third tuning rod 57 is provided rotatably between the front and rear second stands 22. As shown in FIG. 6, bevel gears 58 are fixed to portions of the first tuning rod 55 projecting outward from the left and right bearings 54, respectively, and the front side of the second tuning rod 56 and the second tuning rod 57 (movement of the workpiece). Bevel gears 59 that mesh with those bevel gears 58 are fixed to the portions protruding from the stands 20 and 22 (on the left side in the direction). Therefore, the three tuning rods 55, 56, 57 rotate synchronously via bevel gears 58, 59.
[0036]
Further, a pinion 60 is fixed to a portion inside the bearing 54 of the first tuning rod 55. These pinions 60 mesh with a rack 61 fixed to the front surface of the guide bar 31 on the front side of the slider 30. Pinions 62 are fixed to portions of the second tuning rod 56 and the second tuning rod 57 projecting from the stands 20 and 22 on the rear side thereof, and the pinions are fixed to guide bars on the rear side of the slider 30. 31 is engaged with a rack 63 fixed to the side surface. Accordingly, the pinions 60 and 62 in which one of the racks 61 and 63 is engaged are driven to rotate in accordance with the lifting / lowering operation of the slider 30, and the rotation rotates the other pinions via the tuning rods 55, 56 and 57. . Then, the rack meshing with the pinion is driven up and down in synchronism to urge the slider 30 upward or downward at that position. That is, none of these tuning rods 55, 56, 57 are driven and tuned to rotate according to the elevation of the slider 30 due to the expansion and contraction of the hydraulic cylinder 28. Since the slider 30 moves up and down while maintaining the horizontal state by such tuning drive, it is possible to prevent warping.
[0037]
In the quick open device configured as described above, the state in which the hydraulic cylinder 28 is extended as shown in FIG. 1 is the operating state. In this state, the work is placed between the pinch rolls 12 and 13 above and below the pinch roll part A. It is pinched and sent to the work roll section B. In the work roll section B, a work is passed between a series of upper and lower work rolls 14 and 15, and the work rolls 14 and 15 driven by a motor send the work to the downstream side while correcting the curl of the work. The reaction force of the pressing force applied to the upper work roll 14 is transmitted to the slider 30 via the upper work roll frame 32 and the upper and lower taper wedges of the taper wedge mechanism 36. And it is supported by the front and rear hydraulic cylinders 28 and is supported by the tension of the column 26 via the upper frame 27. Note that if the pressure of the hydraulic cylinder 28 is sufficient, the piston position of the hydraulic cylinder 28 does not fluctuate even if the pressure fluctuates during work correction. In addition, during the straightening operation, only the pressing force is applied between the upper and lower tapered wedges as described above, and thus does not affect the suspension rod 33 and the spring 34 in FIG.
[0038]
The adjustment of the reduction amount of the work is performed by rotating the motor (reference numeral in FIG. 2) M of the taper wedge mechanism 36 on the upstream side and the downstream side, and adjusting the work rolls on the upstream side and the downstream side to an appropriate reduction amount.
[0039]
At the time of maintenance of the work rolls 14 and 15, the slider 30 is raised by operating the hydraulic cylinder 28 as shown on the right side of FIGS. Thereby, the taper wedge mechanism 36 and the upper work roll frame 32 can be raised integrally. Therefore, the adjustment state by the taper wedge mechanism 36 is maintained as it is. Further, the tuning mechanism (reference numeral 53 in FIG. 6) allows the slider 30 to be raised smoothly without causing warpage when the slider 30 is raised. Since the interval between the upper work roll 14 and the lower work roll 15 is greatly increased, the maintenance of the upper work roll 14 and the lower work roll 15 can be easily performed. In this state, the upper work roll 14 can be disassembled and replaced. Further, in the above embodiment, since the lower work roll frame 21 is separated from the front and rear first and second stands 20 and 22, the lower work frame 21 can be removed from the base frame 11, and the lower work roll 15 Replacement and extensive maintenance are easy.
[0040]
After the maintenance of the work rolls 14 and 15 is completed, the piston rod 28a of the hydraulic cylinder 28 is extended, and the slider 30 is lowered. Also at this time, the slider 30 and the upper work roll frame 32 can be lowered integrally, and the slider 30 does not warp. Then, with the hydraulic cylinder 28 fully extended, the original operation state and the adjustment state of the reduction amount are reproduced. Therefore, readjustment is not required, and operation can be resumed as it is.
[0041]
In the above embodiment, the rack and pinion mechanism is adopted as the tuning mechanism. However, a known tuning mechanism using a cable and a pulley, or an active tuning mechanism using a position sensor and a drive motor can also be adopted. . In the above embodiment, the amount of reduction of the upper work roll is adjusted using the taper wedge mechanism. However, the adjustment can be performed using a mechanism using a worm gear and a screw. Further, in the above-described embodiment, the pressing force of the hydraulic cylinder receives the reaction force of correcting the work roll. However, another stopper mechanism for maintaining the lower end of the hydraulic cylinder is provided, and the reaction force is received by the stopper mechanism. It may be. In this case, the supply of the pressure oil to the hydraulic cylinder 28 can be stopped or the pressure can be reduced. Thereby, energy saving is possible. Instead of raising and lowering the slider by the hydraulic cylinder, another lifting drive mechanism such as a lifting and lowering mechanism using a motor and a rack and pinion mechanism or using a ball screw can be adopted.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a leveler provided with a quick-open device of the present invention.
FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is a front view of the quick open device of the leveler.
FIG. 4 is a side view of the quick opening device.
FIG. 5 is an exploded perspective view of a main part of the quick open device.
FIG. 6 is a plan view showing an embodiment of a tuning mechanism according to the present invention.
[Explanation of symbols]
A Pinch roll part
B Work roll part
C Clamp roll
10 Leveler
11 Base frame
12 Upper pinch roll
13 Lower pinch roll
14 Upper work roll
15 Lower work roll
16 Upper clamp roll
17 Lower clamp roll
18 stand
19 Material Side Guide
20 1st stand
20a rising part
21 Lower work roll frame
22 Second stand
22a rising part
23 Upper pinch roll frame
24 cylinders
26 columns
27 Upper frame
28 Hydraulic cylinder
28a Piston rod
28b pin joint
30 slider
30a Front plate
30b back plate
30c upper plate
30d beam member
31 Guide Bar
31a Outer guide groove
31b Inner guide groove
32 Upper work roll frame
32a front plate
32b back plate
32c upper plate
33 Hanging rod
33a, 33b Stop member
34 spring
36 Taper wedge mechanism
37, 38 Lower taper wedge
39, 40 Upper taper wedge
41 Lead screw
42 Coupling
43 bearing
44 Coupling
45 bracket
M motor
47 Guide part
48, 51 Universal joint
49 Gearbox
49a Input shaft
50, 52 output shaft
53 Synchronization mechanism
54 bearing
55, 56, 57 tuning rod
58, 59 Bevel gear
60 (front) pinion
61 (front) rack
62 (rear) pinion
63 (rear) rack

Claims (5)

A leveler comprising: a lower work roll frame provided on a base frame; and an upper work roll frame mounted on the upper side of the lower work roll frame so as to be individually adjustable in height on an upstream side and a downstream side of a work flow. A work roll quick-open device,
A stand erected on the base frame,
A slider provided slidably up and down with respect to the stand;
Driving means for driving the slider up and down,
Under the slider, the upper work roll frame is attached to the upstream side and the downstream side so as to be individually adjustable in height,
Quick open device for work rolls. A guide bar is provided on the slider in the vertical direction, and one surface of the guide bar is in sliding contact with the stand, and the other surface is in sliding contact with the upper work roll frame so as to allow the upper work roll frame to tilt left and right. The quick open device according to claim 1, wherein The stands are provided at positions corresponding to the four corners of the upper work roll frame, and the driving means has a cylinder for driving the slider up and down near its center, and synchronizes the lifting and lowering of the four corners of the slider. The quick-open device according to claim 1, further comprising a tuning mechanism. 4. The quick-open device according to claim 3, wherein the tuning mechanism includes a pinion provided to rotate in synchronization with each stand, and a rack provided on the slider so as to mesh with the corresponding pinion. The quick open apparatus according to claim 1, wherein the lower work roll frame is attached to the base frame independently of a stand.

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