STRIP PLATE WINDING-UP DEVICE

Abstract: The present invention aims to provide a band plate winding system capable of high speed winding at a low cost. The band plate winding system comprises a carrousel type winder (5) having a plurality of individually driven mandrels (7) on a circular support frame (6) provided so as to be rotationally drivable in a vertical plane, and a roll type wrapping device (10) for supporting a plurality of unit rolls (22a to 22d) each provided so as to be movable forward and backward between a position surrounding the mandrel located at a winding start position of the winder (5) and a retreat position.

Description: This invention relates to a band plate winding system for rolling equipment according to the preamble of claim 1 (see, for example JP-A-61 056 730). Background Art On a line delivery side of hot rolling equipment or the like, a down coiler or carrousel type (double-drum type) winder is generally disposed as a band plate winding system for continuously winding a rolled band plate. A conventional band plate winding system using a down coiler is shown, for example, in Fig. 26. As illustrated, a roller table 600 is placed on a rolling equipment line, and a pinch roll (or a deflector roll) 601 is placed near a delivery side of the rolling equipment line. A band plate 602 that has been rolled is guided to mandrels (winding drums) 603 of a plurality of down coilers placed at spaced apart locations on the delivery side of the rolling equipment line. Around each mandrel 603, plural pairs (3 pairs in the drawing) of arm-shaped frames 604a, 604b, 604c are each provided so as to be supported at one end on a fixing base 605 via a shaft 606. Each frame is pivotable such that its front end is brought toward or away from each mandrel 603 from three directions. On the pairs of frames 604a, 604b, 604c, unit rolls 607 are supported so as to come into contact with the mandrel 603, and presser plates 608 are also supported integrally to face an outer surface of the mandrel 603. To these frames 604a, 604b, 604c, driving cylinders 609 are connected for driving the frames 604a, 604b, 604c so as to be brought toward or away from the outer surface of the mandrel 603. Thus, the rolled band plate 602 is moved from the pinch roll 601 along a guide (not shown), and its front end is guided to one of the mandrels 603. Then, with the band plate 602 being pressed against the outer surface of the mandrel 603 by the three unit rolls 607 upon driving by the driving cylinders 609, the mandrel 603 is rotationally driven in a winding direction. In this manner, winding of the band plate 602 is performed. After a predetermined length of the band plate 602 is taken up, the band plate 602 is cut with a cutter (not shown) disposed on the line. A front end of the remaining band plate 602 is guided from the other pinch roll 601 to the other mandrel 603, and the band plate 602 is similarly wound. During this period, a coil of the band plate 602 is removed from the outer surface of the mandrel 603, which has finished winding, onto a carrier trolley or the like. In this manner, winding into a coil is continued. A conventional band plate winding system using a carrousel type winder is exemplified in Fig. 27 As illustrated therein, a circular support frame 610 is installed at a delivery-side side portion of a rolling equipment line so as to be rotationally driven in a vertical plane. At symmetrical positions of the support frame 610, a plurality of mandrels 611 are supported horizontally via bearings. The drawing shows a case in which there are two mandrels 611. The support frame 610 is turned, as necessary, by an inherent driving system. The mandrels 611 on the support frame 610 are driven in a winding or unwinding manner by individual driving systems when a band plate is wound into or unwound from a coil C. At the rolling equipment line side on the support frame 610, a wrapping device 612 for a band plate 602 is provided which moves so as to surround or expose the mandrel 611. The wrapping device 612 is composed of a pair of arm-shaped frames 614 and a pair of arm-shaped frames 615 having one end rotatably mounted on a fixing base 613 via shafts and spreading around the mandrel 611, a belt or chain member 617 passed in an endless form over four guide rolls 616 supported on the pairs of arm-shaped frames 614 and 615 so as to contact the mandrel 611, and two cylinders 618 and 619 for driving both frames 614 and 615 to open and close. The cylinders 618 and 619 have cylinder portions rotatably supported on a fixing base 620 via shafts, and have driving ends rotatably attached to side portions of the frames 614 and 615 via shafts. The band plate coil C wound onto the other mandrel 611 is withdrawn from the mandrel 611, and carried by a trolley 621. Thus, the band plate 602 that has run on a roller table 600 of the rolling equipment line and has left a pinch roll 601 is guided to the mandrel 611 within the wrapping device 612. Then, the band plate 602 is pressed against an outer surface of the mandrel 611 under tension of the belt or chain member 617. During this action, the band plate 602 is formed into a band plate coil C by the winding action of the mandrel 611. When the diameter of the band plate coil C has become large, the cylinders 618 and 619 are driven in a contracted manner to release the belt or chain member 617. The support frame 610 is turned 180° clockwise, and brought to a halt. Then, the belt or chain member 617 is delivered to the surroundings of an unloaded mandrel 611. The band plate 602, which enters the band plate coil C supported on the mandrel 611 at the symmetrical position, is cut with a shear (not shown) disposed on the line. A front end of the cut band plate 602 is guided to the empty mandrel 611 inside the belt or chain member 617 to continue similar winding for forming a band plate coil C. A tail end of the cut band plate 602 on the band plate coil C side, on the other hand, is taken up into the band plate coil C, and then, the winding action of the mandrel 611 is stopped. The band plate coil C on the mandrel 611 is extracted by a hoisting/lowering and traveling operation of the trolley 621, and carried to a next step. With the band plate winding system using a down coiler shown in Fig. 26, a high-temperature band plate 602 that has been hot rolled can be wound at a high rate expressed as "a plate speed of about 1,000 m/min". However, there may be a case in which a trailing end of a preceding band plate and a leading end of a succeeding band plate on the rolling line are weld bonded, while being continuously rolled, and are continuously wound. In this case, 2 to 3 down coilers need to be arranged in tandem on the delivery side of the rolling equipment line. This has posed the problem that the length of the rolling equipment line becomes large, and the installation of the plural down coilers inevitably increases the equipment cost. With the band plate winding system using a carrousel type winder shown in Fig. 27, the provision of plural mandrels 611 on a single circular support frame 610 reduces the length of the line and the scale of equipment. However, even when the rotational driving force of the mandrel 611 is increased, the belt or chain driven by this rotational force cannot be moved at a high speed. Thus, as high speed a run as made by the down coiler shown in Fig. 36 is impossible with the carrousel type winding of the band plate 602. When a chain wrapper is used for hot rolling, for example, "a plate speed of about 250 m/min" is the maximum allowable running speed. This device cannot be used in equipment with a plate speed higher than that. Hence, an object of the present invention is to provide a band plate winding system capable of high speed winding at a low cost. In the Patent Abstracts of Japan, vol. 010, no. 218, there is disclosed a band plate winding system, that comprises a carrousel type winder having a plurality of individually driven mandrels on a circular support frame provided so as to be rotationally drivable in a vertical plane; and a roll type wrapping device for supporting a plurality of unit rolls each provided so as to be movable forward and backward between a position surrounding the mandrel located at a winding start position of the winder and a retreat position. This object is attained by the characterizing features of claim 1. Preferred embodiments of the invention are illustrated in sub-claims 2 and 3. Brief Description of the Drawings Fig. 1 is an explanation view of the operation of a deflector device; Fig. 2 is an explanation view of the operation of the deflector device subsequent to the operation of Fig. 1; Fig. 3 is an explanation view of the operation of the deflector device subsequent to the operation of Fig. 2; Fig. 4 is an explanation view of the operation of the deflector device subsequent to the operation of Fig. 13; Fig. 5 is a schematic side view of a band plate winding system showing a first embodiment of the present invention; Fig. 6 is a side view of an essential part of a band plate winding system showing a second embodiment Fig. 7 is a side view of an essential part of a band plate winding system showing a third embodiment Fig. 8 is a side view of an essential part of a band plate winding system showing a fourth embodiment of the present invention; Fig. 9 is a side view of an essential part of a band plate winding system showing a fifth embodiment Fig. 10 is a sectional view of a small cylinder for a unit roll support arm showing sixth embodiment Fig. 11 is a side view showing a state of mounting of the small cylinder; Fig. 12 is a side view of two frame portions on an upstream side of a rolling equipment line showing a seventh embodiment not covered by the scope of claim 1; Fig. 13 is a front view of the frame portions in Fig. 12; Fig. 14 is an enlarged side view of the III portion in Fig. 12; Fig. 15 is a front view taken on line IV-IV of Fig. 14; Fig. 16 is an explanation view of the operation of the frame portions in Fig. 12; Fig. 17 is another explanation view of the operation of the frame portions in Fig. 12; Fig. 18 is a side view of an essential part of a band plate winding system showing a eighth embodiment of the present invention; Fig. 19 is a front view taken on line V-V of Fig. 18; Fig. 20 is a side view of the band plate winding system in Fig. 18; Fig. 21 is a front view of a band plate winding system showing a ninth embodiment of the present invention; Fig. 22 is a side view taken on line VI-VI of Fig. 21; Fig. 23 is a side view taken on line VII-VII of Fig. 21; Fig. 24 is a front view of a band plate winding system showing a tenth embodiment; Fig. 25 is a side view taken on line VIII-VIII of Fig. 24; Fig. 26 is a schematic side view showing an example of a conventional band plate winding system; and Fig. 27 is a schematic side view showing another example of a conventional band plate winding system. Best Mode for Carrying Out the Invention A band plate winding system according to the present invention will now be described in detail by way of the following embodiments with reference to the accompanying drawings. Fig. 1 is an explanation view of the operation of the deflector device. Fig. 2 is an explanation view of the operation of the deflector device subsequent to the operation of Fig. 1. Fig. 3 is an explanation view of the operation of the deflector device subsequent to the operation of Fig. 2. Fig. 4 is an explanation view of the operation of the deflector device subsequent to the operation of Fig. 3. A large frame 105a of a wrapping device 104 according to the present embodiment is extended as follows: When unit rolls 106a, 106b (see Fig. 1) of the large frame 105a are stopped with a predetermined spacing from and around a mandrel 101 or 102 at a winding start position 100a (i.e., in the operating state), a front end of the large frame 105a is located nearer to an upper deflector roll 92 than in the case of the large frame 105a of the preceding embodiment. At the front end of the large frame 105a, upper guide means 96 is provided. The upper guide means 96 is constituted such that a horizontal spacing w 2 between its front end and the upper deflector roll 92 is set to be smaller than the horizontal spacing w 1 between the upper deflector roll 92 and the upper guide means 95 in the preceding embodiment so that it will be slightly greater than the thickness, t, of a band plate 98 (i.e., t + several millimeters) . Besides, the front end of its downward guide surface 96a is positioned at a height, h 2 , greater than the height h 1 in the preceding embodiment. Above the upper guide means 96 at the front end of the large frame 105a, an auxiliary deflector roll 97 is provided rotatably. The auxiliary deflector roll 97 is held at such a position that its center makes a predetermined deflection angle α (e.g., 60°) for upward deflection from the center of the upper-deflector roll 92, in a state in which the unit rolls 106a, 106b of the large frame 105a are stopped with a predetermined spacing from and around the mandrel 101 or 102 at the winding start position 100a (i.e., in the operating state). That is, the auxiliary deflector roll 97 is disposed so as to be movable forward and backward integrally with the upper guide means 96, and increases the angle of deflection of the band plate 98 from the upper deflector roll 92. The above-mentioned lower deflector roll 91, upper deflector roll 92, entrance guide means 93, lower guide means 94, upper guide means 96, and auxiliary deflector roll 97 together constitute a deflector device 90 according to the present embodiment. According to such a deflector device 90, as explained earlier, the horizontal spacing w 2 between the front end of the upper guide means 96 and the upper deflector roll 92 is set to be slightly greater than the thickness, t, of the band plate 98 (i.e., t + several millimeters), and the front end of the downward guide surface 96a of the upper guide means 96 is positioned at the height h 2 which is larger than the aforementioned height h 1 . Thus, as shown in Fig. 10, even if the front end of the band plate 98 being fed at a high speed from the rolling equipment warps upward, it becomes more difficult, than in the aforementioned embodiment, for this front end to enter the horizontal spacing w 2 between the front end of the upper guide means 96 and the upper deflector roll 92. Instead, the front end can be positioned more reliably below the downward guide surface 96a of the upper guide means 96. Consequently, the front end of the band plate 98 can be guided further reliably to the wrapping entrance of the mandrel 101 or 102 at the winding start position 100a. Once the band plate 98 begins to be wound by the mandrel 101, a wrapping device 104 is retreated as shown in Fig. 1. With the mandrel 101 being driven to wind the band plate 98, a circular support frame 103 (see Fig. 4) is turned to move the mandrel 101 to a winding completion position 100b (see Fig. 2). At the same time, an empty mandrel 102 at the winding completion position 100b is moved to the winding start position 100a. As shown in Fig. 2, the band plate 98 is wound onto the mandrel 101 while being caused to run in a deflected manner in an upwardly inclined direction under the action of the upper deflector roll 92. As shown in Fig. 13, on the other hand, the wrapping device 104 is advanced to the original operating position, and set again. In this condition, the auxiliary deflector roll 97 of the deflector device 90 contacts a lower surface of the band plate 98 being wound, pushing the band plate 98 upward. Thus, the band plate 98 is deflected so that the large frame 105a and the upper guide means 96 do not impede the travel of the band plate 98. Then, upon sensing of a predetermined winding length of the band plate 98 on the mandrel 101 at the winding completion position 100b, the band plate 98 is cut with a cutter (shear) which is not shown. A preceding band plate 98 is wound onto the mandrel 101 at the winding completion position 100b, while the front end of a succeeding band plate 98 is guided by the deflector device 90 to a wrapping entrance of the mandrel 102 at the winding start position 100a, and wound onto the mandrel 102 (see Fig. 4). Subsequently, the same action as above is repeated. As stated earlier, the horizontal spacing w 2 between the front end of the upper guide means 96 and the upper deflector roll 92 is set to be slightly greater than the thickness, t, of the band plate 98 (i.e., t + several millimeters), and the front end of the downward guide surface 96a of the upper guide means 96 is positioned at the height h 2 which is greater than the aforementioned height h 1 . In so setting, the auxiliary deflector roll 97 is provided so that the large frame 105a and the upper guide means 96 do not impede the travel of the band plate 98. By this measure, the angle of deflection of the band plate 98 from the upper deflector roll 92 is increased. According to the above deflector device 90, therefore, even if the front end of the band plate 98 warps upward, the front end of the band plate 98 can be guided more reliably, than in the aforementioned embodiment, to the wrapping entrance of the mandrel 101 or 102 at the winding start position 100a. Hence, the band plate 98 can be continuously wound more reliably. [First Embodiment] Fig. 5 is a schematic side view of a band plate winding system showing a seventh embodiment of the present invention. In Fig. 5, the reference numeral 110 denotes a roll type wrapping device disposed in combination with a carrousel type winder 210. The wrapping device 110 comprises a pair of arcuate lower large frames 113, a pair of arcuate lower medium frames 114 and a pair of arcuate lower small frames 115 having one end pivotably supported on a support shaft 111 so as to be movable toward and away from a mandrel 212 at a winding start position 210a below a pass line of a band plate 200; an upper frame 116 having one end pivotably supported on a support shaft 112 so as to be movable toward and away from the mandrel 212 at the winding start position 210a above the pass line of the band plate 200; a unit roll 117, a unit roll 118, a unit roll 119 and a unit roll 120 supported on the frames 113 to 116, respectively; cylinders 121 to 124 for moving the frames 113 to 116 back and forth about the support shafts 111 and 112, namely, for moving the frames 113 to 116 to an operating position indicated by a solid line and a retracted position indicated by a chain line; an arm 125 pivotably supported by the lower large frame 113 to pivotably support the unit roll 117; a small cylinder 126 for pivoting the arm 125 to finely adjust the position of the unit roll 117; a wrapping guide arm 127 pivotably supported by a front end side of the lower large frame 113; a small cylinder 128 for pivoting the wrapping guide arm 127 to finely adjust its position; an arm 129 pivotably supported by the upper frame 116 to pivotably support the unit roll 120; and a small cylinder 130 for pivoting the arm 129 to finely adjust the position of the unit roll 120. At a front end of the lower medium frame 114, lower guide means 131 is provided. At a band plate 200 entry side of the lower guide means 131, entrance guide means 132 is independently disposed. According to the present embodiment, the wrapping guide arm 127, small cylinder 128, etc. constitute winding guide means. The band plate 200 winding action of the carrousel type winder 210 combined with the roll type wrapping device 110 is described below. The frames 113 to 116 and unit rolls 117 to 120 of the wrapping device 110 are each set at a solid line position opposed to the mandrel 212 of the winder 210. Then, when the band plate 200 is fed from rolling equipment, the mandrel 212 and the unit rolls 117 to 120 are driven and rotated in a winding direction to wind the band plate 200 around the mandrel 212. Along with the winding of the band plate 200 around the mandrel 212, the frames 113 to 116 move to positions outside a locus of revolution of the mandrel 212 (i.e., to positions indicated by chain lines) according to the turning of a circular support frame 211. In accordance with the turning of the circular support frame 211 in a direction of an arrow A, the mandrel 212 moves to a winding completion position 210b while being driven to perform winding. During this action, an empty mandrel 213 at the winding completion position 210b moves to the winding start position 210a. At this time, the upper frame 116 moves to an upper retracted position (indicated by a chain line). The band plate 200 from the rolling equipment is deflected in an upwardly inclined manner at a pinch roll 203, and wound round the mandrel 212 at the winding completion position 210b. Then, the frames 113 to 116 are each set again at the original operating position (indicated by a solid line) opposed to the mandrel 213. Simultaneously, the unit roll 120 on the upper frame 116 contacts an upper surface of the band plate 200, and is set at the original operating position (indicated by a solid line) while pushing the band plate 200 downward. Upon sensing of a predetermined winding length of the band plate 200, the band plate 200 is cut with a cutter 202. A preceding band plate 200 is wound onto the mandrel 212 at the winding completion position 210b. Whereas the small cylinder 128 of the wrapping guide arm 127 and the small cylinder 130 of the arm 129 are actuated synchronously, whereupon the unit roll 120 and the wrapping guide arm 127 act cooperatively, thereby winding a succeeding band plate 200 round the mandrel 213. That is, the unit roll 120 on the upper frame 116 enables the band plate 200 to be deflected in an upwardly inclined direction, and also the band plate 200 to be directed in a different direction. Thus, even when the band plate 200 is wound round the mandrel 212 of the winder 210, while the wrapping device 110 is reset around the other empty mandrel 213, the band plate 200 is no more damaged. Besides, it becomes possible to wind the rear end of the preceding band plate 200 on the winding completion position 210b side, and the front end of the succeeding band plate 200 on the winding start position 210a side, reliably in a divided manner. Furthermore, the unit roll 120 to be located at the upper winding entrance of the mandrel 213 is supported by the upper frame 116. Thus, the length of the lower large frame 113 can be shortened, so that the range of movement of the lower large frame 113 during retraction can be decreased. Hence, the diameter of revolution of the mandrel 212 or 213 according to the turn of the circular support frame 211 can also be decreased, so that the diameter of the circular support frame 211 can be reduced. If the maximum diameter of a coil taken up by the mandrel 212 or 213 is a constant value of 2.1 m, for example, the diameter of revolution of the mandrel 212 or 213 according to the turn of the circular support frame 211 needs to be set at about 2.7 m in the case of the conventional system. According to the present embodiment, on the other hand, the diameter of revolution of the mandrel 212 or 213 according to the turn of the circular support frame 211 may be about 2.3 m. Thus, the circular support frame 211 of the carrousel type winder 210 can be reduced by about 15% compared with the conventional system. [Second Embodiment] Fig. 6 is a side view of an essential part of a band plate winding system showing a second embodiment As shown in Fig. 6, first guide means 140 for guiding a front end of a band plate 200 from rolling equipment to a wrapping entrance of a mandrel 212 or 213 is provided at a front end portion of the upper frame 116 indicated in the preceding embodiment. The first guide means 140 comprises a moving guide plate 141 having one end attached pivotably to a front end of the upper frame 116 and extending toward the rolling equipment; a tilting small cylinder 142 connected by a shaft between the other end side of the moving guide plate 141 and the upper frame 116; and a fixed guide plate 143 fixed to the upper frame 116 in a manner continued from a base end of the moving guide plate 141. With the above-described wrapping device, the band plate 200 can be reliably guided to the mandrel 212 by the moving guide plate 141 and fixed guide plate 143 of the first guide means 140. Furthermore, the small cylinder 142 is actuated to lift the moving guide plate 141 (to a chain line position in Fig. 6) and move the upper frame 116 to a retracted position. By so doing, the first guide means 140 can be held at a position at which it does not impede the movement of the band plate 200 from a pinch roller 203 toward the mandrel 212 at a winding completion position 210b. When the mandrel 212 has moved to the winding completion position 210b, therefore, the first guide means 140 does not contact the band plate 200 being wound, and damage to the band plate 200 can be prevented. The upper frame 116 is pushed outward to an operating position (indicated by a solid line) to guide a front end of a cut band plate 200 toward the mandrel 213 located at a winding start position 210a. At this time, the moving guide plate 141 is brought to a suitable inclined or parallel posture relative to a pass line of the band plate 200. By this measure, the front end of the band plate 200 can be guided reliably to a wrapping entrance of the mandrel 213. [Third Embodiment] Fig. 7 is a side view of an essential part of a band plate winding system showing a third embodiment. As shown in Fig. 7, second guide means 150 opposed from above to a pass line of a band plate 200 is pivotably disposed on an entry side of the first guide means 140 in the preceding embodiment, i.e., between a rolling equipment side and the first guide means 140, so as to be continued from the first guide means 140. The second guide means 150 comprises a moving guide plate 151 which has one end attached upwardly and downwardly pivotably to a stand or the like of a pinch roll 203 above an upwardly inclined pass line of the band plate 200 heading from the pinch roll 203 toward a mandrel 213 at a winding completion position 210b, and which extends to a position close to or overlapping an entry-side end of the first guide means 140; and a tilting small cylinder 152 connected by a shaft between the other end side of the moving guide plate 151 and an upper fixed structure. With the above-described wrapping device, the band plate 200 can be further reliably guided to a mandrel 212 by the first guide means 140 and the second guide means 150. Besides, a small cylinder 142 of the first guide means 140 is actuated to lift a moving guide plate 141 and move an upper frame 116 to a retracted position. Then, the small cylinder 152 of the second guide means 150 is actuated to lift the moving guide plate 151 for a constant stroke in an inclined manner. By so doing, the guide means 140 and 150 can be held at positions at which they do not impede the movement of the band plate 200 from the pinch roller 203 toward the mandrel 212 at the winding completion position 210b. When the mandrel 212 has moved to the winding completion position 210b, therefore, the guide means 140 and 150 do not contact the band plate 200 being wound, and damage to the band plate 200 can be prevented. When the moving guide plate 151 of the second guide means 150 is moved downward, the front end of the moving guide plate 151 is positioned below the front end of the moving guide plate 141 of the first guide means 140. By this measure, the front end of a cut band plate 200 can be guided to a wrapping entrance of the mandrel 213 further reliably and safely. [Fourth Embodiment] Fig. 8 is a side view of an essential part of a band plate winding system showing a fourth embodiment of the present invention. As shown in Fig. 8, at a front end of the wrapping guide arm 127 in the previous embodiment, there are provided a wrapping guide plate 161 facing a mandrel 212 or 213, and a deflecting guide plate 162 facing a band plate 200 which deflects in an upwardly inclined direction at a unit roll 120 of an upper frame 116 set at an operating position. At a portion of the wrapping guide arm 127 which faces an arm 125, a safety plate 163, as interlocking means, is provided so as to face the arm 125 with a slight gap present between the safety plate 163 and the arm 125. With the above-described wrapping device, there may be a case in which after the front end of the band plate 200 passes along the wrapping guide plate 161, a small cylinder 128 does not work for an unexpected reason when it is attempted to move the wrapping guide arm 127 backward by driving the small cylinder 128. Even in this case, as the arm 125 recedes by the action of the small cylinder 126, the safety plate 163 is pushed by the arm 125 to move the wrapping guide arm 127 backward. That is, the wrapping guide arm 127 recedes in association with the backward movement of the unit roll 120 of the upper frame 116. Hence, even if the small cylinder 128 does not act for an unexpected reason when its driving is to move the wrapping guide arm 127, the front end of the band plate 200 can be prevented from jamming between the wrapping guide plate 161 and the mandrel 213. [Fifth Embodiment] Fig. 9 is a side view of an essential part of a band plate winding system showing a fifth embodiment As shown in Fig. 9, a unit roll 120' of the upper frame 116 in the previous embodiment is larger in diameter than other unit rolls 117 to 119. Thus, a band plate 200 contacts a mandrel 212 or 213 at the first entrance on a large roll curved surface of the unit roll 120', so that the front end of the band plate 200 can be drawn in more reliably, than in the case of the unit roll 120 used in the previous embodiment, along an outer peripheral surface of the mandrel 212 or 213. Moreover, the front end of the band plate 200 can be reliably brought upward or downward in an assorted manner. Furthermore, even when the gap between a wrapping guide plate 161 of a wrapping guide arm 127 and the mandrel 212 or 213 is rendered large, the front end of the band plate 200 can be reliably brought upward or downward in an assorted manner. Hence, jamming of the front end of the band plate 200 can be prevented further reliably. [Sixth Embodiment] Fig. 10 is a sectional view of a small cylinder for a unit roll support arm showing a sixth embodiment of the present invention. Fig. 11 is a side view showing a state of mounting of the small cylinder. In Fig. 10, the reference numeral 220 denotes a small cylinder for backing up a unit roll 259 shown in the tenth and eleventh embodiments. The small cylinder 220 is composed of a rod-side cylinder cover 221, an intermediate cover 222, a head-side cover 223, and two cylinder barrels 224, 225 provided in series between these covers. The reference numeral 226 denotes a rod. The reference numeral 227 denotes a piston. The reference numeral 228 denotes a piston stroke oil chamber inside the cylinder barrel 224. The reference numeral 229 denotes a through-hole inside the intermediate cover 222. The reference numeral 230 denotes a head-side cushioning oil chamber formed in the cylinder barrel 225 so as to communicate with the piston stroke oil chamber 228 via the through-hole 229. The reference numeral 231 denotes a longitudinal shaft for support of the small cylinder 220 on a large frame. The stroke length, S, of the piston stroke oil chamber 228 is the same as the length in the conventional system that is the sum of a necessary forward or backward movement amount, L, of the unit roll 259 during winding of a band plate and an allowance α. The head-side cushioning oil chamber 230 has a length over which to contain an amount of a pressure oil enough to cushion maximum impact force that the unit roll 259 undergoes from a band plate 200 side. Fig. 11 shows a case in which the small cylinder 220 produced on an actual machine basis with the above-mentioned constitution is applied onto a lower large frame 233 of the roll type wrapping device in the tenth and eleventh embodiments. The small cylinder 220 of the above-mentioned constitution can be used in place of the small cylinder 24b in the wrapping device of the first embodiment. In either case, the small cylinder 220 can be mounted on the large frame whose shape is unchanged or slightly changed. Provision of the intermediate cover 222 between the piston stroke oil chamber 228 and the impact force cushioning oil chamber 230 cab reinforce the intermediate portion of the elongated cylinder 220. Thus, the cylinder 220 can be mounted on the lower large frame safely at the intermediate cover 222. According to this constitution, the pressure oil chamber containing an amount of a pressure oil capable of cushioning maximum impact force imposed on the unit roll 259 is provided on the head side of the piston rod of the small cylinder 220. Thus, all impact forces, high and low, which are imposed on the unit roll 259 on the lower large frame from the band plate 200 side during winding of the band plate 200 onto the mandrel 212 can be absorbed and cushioned by the backup small cylinder 220 always safely. Hence, failure of the system and occurrence of a defective product due to impact force during band plate winding can be dissolved, and productivity increased. [Seventh Embodiment] The seventh embodiment is not covered by the scope of the claim 1 and is introduced for useful understanding of the invention. Fig. 12 is a side view of two frame portions on an upstream side of a rolling equipment line showing a thirteenth embodiment of the present invention. Fig. 13 is a front view of the frame portions in Fig. 12. Fig. 14 is an enlarged side view of the III portion in Fig. 12. Fig. 15 is a front view taken on line IV-IV of Fig. 14. Fig. 16 is an explanation view of the operation of the frame portions in Fig. 12. Fig. 17 is another explanation view of the operation of the frame portions in Fig. 12. In Fig. 12, the reference numeral 301 denotes a mandrel resting statically at the winding start position 301a in the tenth and eleventh embodiments. The reference numerals 362, 363 denote two (i.e., upper and lower) rolls facing a side surface, on a rolling line upstream side, of the mandrel 301. The reference numeral 352 denotes a support shaft shared by a large frame 113 (see Fig. 18) below the mandrel 301. The reference numeral 311 denotes a support shaft additionally provided on a rolling line upstream side of the support shaft 352. The reference numeral 312 denotes a frame for supporting the unit roll 362, the frame having a lower end pivotably supported by the support shaft 311. The reference numeral 313 denotes a frame for supporting the unit roll 363, the frame having a lower end pivotably supported by the support shaft 352. The support shaft 352 is fixedly supported by a bearing 352a, while the support shaft 311 is rotatably provided on a bearing 311a via a bearing. The support frame 312 is provided externally so as to be pivotable by having an upper central rear portion connected to a rod end of a cylinder 367. The support frame 313 is provided internally so as to be pivotable by having an upper central rear portion connected to a rod end of a cylinder 368 which passes through an opening portion 314 of the support frame 312, as shown in Figs. 12 and 13. In the internal support frame 313, lower rear surface portions of both side plates thereof which support the unit roll 363 and a band plate wrapping guide member 365 are each a concave curved surface portion 315 in a panel-like form so as not to interfere with the support shaft 311 at an adjacent position during retreating movement. In the external support frame 312, upper portions of both side plates which support the unit roll 362 and a band plate wrapping guide member 364 are each shaped like a panel. In a lower portion between both side plates, the opening portion 314 is formed. An upper half of the support frame 313 can come in and go out of the opening portion 314. At an inner edge portion of both side plates of the external support frame 312, a concave curved surface portion 316 is formed. The concave curved surface portion 316 is designed such that when the internal support frame 313 is moved to a set retreat position with the external support frame 312 being set at a band plate winding position, the external support frame 312 does not contact or interfere with the unit roll 363 of the internal support frame 313. In Figs. 14 and 15, a shaft-attached portion at a lower end of the internal support frame 313 is constituted such that a boss portion fitted onto an outer surface of a bearing on the support shaft 352 has a semi-arcuate split piece 317. The semi-arcuate split piece 317 is joined to the boss portion on the frame 313 body side by screws 318 while sandwiching the bearing on the support shaft 352, whereby the frame 313 can be fixed detachably to the support shaft 352. Fig. 16 shows a state in which after the aforementioned two pivotable frames 312 and 313 upstream of the mandrel are set in the band plate winding position, only the internal pivotable frame 313 is moved to the set retreat position. When a band plate 300 begins to be wound, and is piled up on the mandrel 301, the unit rolls 362, 363 pressing the surface of the band plate 300 against the mandrel 301 at a constant oil pressure are pushed back as the diameter of the band plate increases. The band plate 300 piled on the mandrel 301 reaches a set coil diameter (thickness) 300a, all the unit rolls including the unit rolls 362, 363 are separated from the band plate surface, and moved to a predetermined retreat position. Fig. 16 shows a case in which while the unit roll 362 of the external frame 312 is in contact with the coil surface, the unit roll 363 of the internal frame 313 precedes, and moves to the retreat position. The unit roll 363 of the internal frame 313, as shown in Figs. 12 and 16, sets as a predetermined retreat position a position in the concave curved surface 316 of the external frame 312 held in a condition in contact with the coil surface. By detecting its moving distance or the like by means of a detector, the unit roll 363 is allowed to move to the retreat position without contacting the external frame 312. In the state of Fig. 16, at this time, clearances C 1 , C 2 in agreement with the pivoting distance of the external frame 312 corresponding to the coil thickness 300a are retained between the concave curved surface portion 315 of the internal frame 313 and the support shaft 311, and between the concave curved surface portion 316 of the external frame 312 and the unit roll 363, respectively. Of these clearances, the clearance C 2 is set to be kept minimal when only the external frame 312 is pivoted and returned to the wrapping position relative to the empty mandrel 301, as shown in Fig. 12. According to the above constitution, when only the internal frame 313 is moved to the retreat position in a preceding manner, and when only the external frame 312 is returned to the wrapping position relative to the empty mandrel 301, collision and interference between the unit roll 363 on the internal frame 313 and the external frame 312 are resolved. Next, Fig.17 shows a case in which the external frame 312 and the internal frame 313 are synchronously moved to a retreat position. The external frame 312 sets as a retreat position a position at which the external frame 312 is apart by a certain distance, as illustrated, from the surface of the band plate wrapping thickness 300a on the mandrel 301. With its moving distance or the like being detected by a detector, the external frame 312 is moved to the retreat position. At this time, the internal frame 313 is moved to the same retreat position as shown in Fig. 16, and stopped there. The clearance C 1 between the concave curved surface portion 315 of the internal frame 313 and the support shaft 311 of the external frame 312 is kept minimal in this state. According to the above constitution, when the external frame 312 and the internal frame 313 are synchronously moved from the retreat position in Fig. 17 to the band plate wrapping position, collision and interference between the external frame 312 and the unit roll 363 on the internal frame 313 no longer occur, even if only the external frame 312 moves to the band plate wrapping position in a preceding manner. With both frames 312 and 313 having moved to the retreat position, the mandrel 301 during winding of the band plate 300 revolves clockwise according to the turning of the circular support frame while winding the band plate 300. In this manner, this mandrel 301 is replaced by an empty mandrel 301 located at the winding completion position. Besides, the attachment boss portion of at least the internal frame 313 for attachment to the support frame 352 is shaped like the semi-arcuate split form 317, and is adapted to be detachably secured to the support frame 352 by the screws 318. Thus, attachment and detachment of the internal frame 313 become markedly easy for maintenance, etc. According to the above-described embodiment, at the time of the switching movement of the two pivotable frames 312 and 313 for support of the unit rolls 362 and 363 of the mandrel 301 to the band plate wrapping position and the retreat position, collision and interference between both frames 312 and 313 are resolved. Hence, damage to the machine and interruption of operation due to their collision or interruption can be eliminated. Furthermore, a system easy to assemble and maintain can be provided. [Eighth Embodiment] Fig. 18 is a side view of an essential part of a band plate winding system showing a eighth embodiment of the present invention. Fig. 19 is a front view taken on line V-V of Fig. 18. Fig. 20 is a side view of the band plate winding system in Fig. 18. In Figs. 18 to 20, the reference numeral 401 denotes a roller table of a rolling equipment line, 402 denotes a plate cutter on a delivery side of the line, 403 denotes a pinch roll, 404 denotes a rolled band plate, 406 denotes a carrousel type winder, and 450 denotes a roll type wrapping device placed in combination with the carrousel type winder 406. The carrousel type winder 406 and the roll type wrapping device 450 constitute a band plate winding system. The carrousel type winder 406 is composed of a circular support frame 407 placed at a side portion on the delivery side of the line so as to be rotationally drivable, and two mandrels 408, 408 supported at symmetrical positions of the circular support frame 407 individually rotationally drivable about a horizontal axis. The reference numeral 408a denotes a winding start position of the mandrel 408, while the reference numeral 408b denotes a winding completion position of the mandrel 408. The wrapping device 450 has a pair of arcuate piece-like lower large frames (pivoting frames) 433, a pair of arcuate piece-like medium frames (pivoting frames) 454, and a pair of arcuate piece-like small frames (pivoting frames) 455, each frame having one end supported pivotably on a support shaft 452 on a base 451. On the pair of lower large frames 433, a second panel-like arm 410 and a first panel-like arm 411 having both ends pivotably supported are mounted. On front end portions of the second panel-like arm 410 and the first panel-like arm 411, wrapping guide members 461, 460 are provided. On the second panel-like arm 410, a unit roll 459 is also provided. On the pair of medium frames 454 and the pair of small frames 455, respectively, a unit roll 462 and a unit roll 463 having both ends supported are provided, and wrapping guide members 464, 465 are also provided. To the frames 433, 454, 455, cylinders 466, 467, 468 to be moved back and forth around the support shaft 452 are connected. To the second panel-like arm 410 and the first panel-like arm 411, small cylinders 441, 470 for moving toward and away from a mandrel side on the frames 433 are connected. An upper frame 434 has one end pivotably supported by a horizontal shaft 436 on an upper base 435, and has the other end on which a panel-like arm 438 is provided so as to be pivotable by a small cylinder 439. To an intermediate portion of the upper frame 434, a cylinder 437 is connected. Upon extension and contraction of the cylinder 437, the upper frame 434 is pivoted so as to be movable toward and away from the mandrel 408. On the panel-like arm 438, an upper-side unit roll 458 having both ends supported is independently provided. The circular support frame 407 and the mandrels 408, 408 are moved in a direction of an arrow A, with the frames 433, 434, 454, 455 of the wrapping device 450 being open at positions shown by one-dot chain lines. In a state in which an empty mandrel 408 is stopped at a winding start position 408a, the unit rolls 458, 459, 462, 463 and the wrapping guide members 460, 461, 464, 465 are set, as shown by solid lines, around this mandrel 408. At this time, winding of a rolled band plate 404 is started. After wrapping of the band plate 404 around the mandrel 408 is confirmed, the frames 433, 434, 454, 455 of the wrapping device 450 become open at the positions shown by the one-dot chain lines. In this state, the circular support frame 407 revolves in the direction of arrow A. According to this revolution, the mandrel 408 also moves along the periphery of the circular support frame 407 while winding the band plate 404. When the mandrel 408 stops at the winding completion position 408b, winding of the band plate 404 is finished. Then, winding of the band plate 404 around the mandrel 408 at the winding start position 408a is repeated by the same procedure as described above. According to the present embodiment, as shown in Figs. 18 and 19, the second panel-like arm 410 is composed of a U-shaped panel-like arm body, and has shaft-attached portions 410a at protruding ends of its U shape. The first panel-like arm 411 is composed of a roughly I-shaped panel-like arm body, and has shaft-attached portions 411a at its lower jutting portions. On its upper jutting portion, the wrapping guide member 460 is provided. The upper head side of the first panel-like arm 411 passes through a U-shaped space defined by the second panel-like arm 410, and faces a surface of the mandrel 408. That is, the shaft-attached portions 410a of the second panel-like arm 410 are provided in a plane of projection of a head portion 411b of the first panel-like arm 411 at the winding start position, and the first panel-like arm 411 and the second panel-like arm 410 are constituted as above. Thus, the head side of the first panel-like arm 411 can pass between the shaft-attached portions 410a and 410a of the second panel-like arm 410, and move toward and away from the mandrel 408. The shaft-attached portion 410a of the second panel-like arm 410 is supported on a fixing shaft 412 which is supported via a bearing 413a by a bearing 413 provided on the lower large frame 433. The shaft-attached portion 411a of the first panel-like arm 411 is also supported via a bearing 413a by a bearing 413 provided on the lower large frame 433. According to the above constitution, the head side of the first panel-like arm 411 can freely move back and forth in the U-shaped space between the shaft-attached portions 410a of the second panel-like arm 410. Thus, the length, including the shaft-attached portions 410a, of the second panel-like arm 410 can be designed freely, without interference with the first panel-like arm 411. Also, the shaft-attached portion 410a of the second panel-like arm 410 can be supported on the lower large frame 433 in an outward open free space. Thus, the center distance S between the unit roll 459 and the shaft-attached portion 410a of the second panel-like arm 410 can be made great. In addition, the shaft-attached portion 410a can be safely supported by the bearing 413, etc. on the lower large frame 433. Consequently, when a reaction force of the band plate is imposed on the unit roll 459, the second panel-like arm 410 can pivot smoothly counterclockwise, so that concentration of stress on the shaft-attached portion 410a and damage thereto are resolved. [Ninth Embodiment] Fig. 21 is a front view of a band plate winding system showing a ninth embodiment of the present invention. Fig. 22 is a side view taken on line VI-VI of Fig. 21. Fig. 23 is a side view taken on line VII-VII of Fig. 21. As shown in Fig. 22, a wrapping device 505 at a winding start position 504a is provided with four unit rolls 516a, 516b, 516c, 516d. The unit roll 516a on an upper side has both ends supported on a frame 518a turning upward about a support shaft 517a. The unit rolls 516b, 516c, 516d on a lower side each have both ends supported on frames 518b, 518c and 518d turning downward about support shafts 517b and 517d. As shown in Fig. 21, a detachable mandrel front end support device 520 is provided on a support base 521 on a work side W s of the wrapping device 505. The mandrel front end support device 520 has a contour formed in a rail sectional shape. Each unit roll driving system 522 is placed along a side portion of the mandrel front end support device 520, and is placed between the shaft ends of the unit rolls 516a to 516d and each support base 523 apart on the work side. As shown in Figs. 21 and 23, the mandrel front end support device 520 is supported on two track elements 524 provided parallel in a mandrel shaft direction on the support base 521, and is connected to a horizontal driving cylinder 525 provided on the support base 521. Upon driving of the cylinder 525, the mandrel front end support device 520 is moved in a switching manner to a mounting position or a dismounting position in an axial direction of a mandrel 504. The mandrel front end support device 520 has a lower portion spreading over and spanning the two track elements 524. A portion of the mandrel front end support device 520 passing between the unit rolls 516b and 516c forms a waist portion with a narrow width, and extends upward. An upper portion of the mandrel front end support device 520 forms a transverse cylindrical mandrel front end receiving portion. The entire contour of the mandrel front end support device 520 is in the shape of a rail section. Each driving system 522 for the unit roll is composed of a motor 526 placed on the support base 523 apart on the work side, and an extendable transmission shaft 528 connected between an output shaft end of the motor 526 and a shaft end of the unit roll via universal joints 527. Fig. 23 shows an arrangement relationship of the mandrel front end support device 520 and the unit roll driving systems 522 as viewed sideways. The four driving motors 526 are arranged at positions near the axes of the support shafts 517a, 517b and 517d for the unit rolls. The transmission shafts 528 and the four unit rolls 516a, 516b, 516c, 516d connected to the driving motors 526 are each arranged in such a manner as to keep a clearance from the upper portion and the waist portion of the mandrel front end support device 520. At a winding completion position 504b, a mandrel front end support device 510, and a carrier trolley 511 for coil extraction are provided. The action of the wrapping device 505 of the above-described constitution will now be described. The mandrel front end support device 520 is moved, by extension and contraction of the driving cylinder 525, to a position shown by a solid line and a position shown by a chain line in Fig. 21. Upon contraction of the driving cylinder 525, the mandrel front end support device 520 moves to the solid line position apart from the front end of the mandrel 504, and enters a wait state. In accordance with the contraction of the cylinder, the unit rolls 516a, 516b, 516c, 516d are each moved backward in a direction of an arrow to a position apart from the mandrel 504, and put on standby. In this state, a circular support frame 503 is turned, whereby the mandrel 504 can be freely made to make a revolving movement between the winding start position 504a and the winding completion position 504b. With an empty mandrel 504 being moved to and stopped at the winding start position 504a, the unit rolls 516a, 516b, 516c, 516d are sent to face a peripheral surface of the empty mandrel 504. Upon extension of the driving cylinder 525, the mandrel front end support device 520 is brought to the chain line position to support the front end of the mandrel, completing preparations for winding of a band plate. At this time, the unit rolls 516a, 516b, 516c, 516d and the transmission shafts 528 remain spaced from the mandrel front end support device 520, and can move between the solid line position and the chain line position, without touching the mandrel front end support device 520. In this state, the mandrel 504 and the unit rolls 516a, 516b, 516c, 516d are rotationally driven, and a band plate is fed from the rolling line to a space between the unit rolls 516a, 516b and the mandrel 504, whereupon the band plate is wrapped about the mandrel 504. During rotation of the unit rolls 516a, 516b, 516c, 516d, the transmission shafts 528 rotate while keeping spaced from the mandrel front end support device 520. Thus, the interference of the unit roll driving system 522 with the mandrel front end support device 520 is resolved. At the start of winding of the band plate, both ends of the mandrel 504 are supported. Thus, warpage of the front end of the mandrel 504 due to impact by the incoming band plate at the start of winding is resolved, and deviated winding of the band plate in the axial direction is also eliminated. After wrapping of the band plate around the mandrel 504 is confirmed, the mandrel front end support device 520 is moved backward to the solid line position upon contraction of the driving cylinder 525. Also, the unit rolls 516a, 516b, 516c, 516d are withdrawn to retracted positions. In this state, the mandrel 504 at the winding start position 504a continues to wind the band plate, and is moved revolvingly to the winding completion position 504b in accordance with the turning of the circular support frame 503. Synchronously with this movement, the empty mandrel 504 that has a coil taken out at the winding completion position 504b is moved to the winding start position 504a. At the winding start position 504a, the mandrel front end support device 520 is brought to a position at which it supports the front end of the empty mandrel 504. Also, the unit rolls 516a, 516b, 516c, 516d are each brought to a position opposed to the mandrel 504 to be ready for next winding of the band plate. At the winding completion position 504b, the front end of the mandrel 504 is supported by the front end support device 510 to perform winding of the band plate. At completion of winding, a front end of the band plate cut on the rolling line is supplied to the empty mandrel 504 on standby. In this manner, wrapping of a next band plate is repeated, and extraction of a coil that has been wound at the winding completion position 504b is repeated. According to the foregoing band plate winding system, even when the unit roll driving systems 522 of the wrapping device 505 are provided on the work side of the rolling line, the mandrel front end support device 520 can be safely placed at the winding start position 504a without its interference with the unit roll driving system. Thus, a failure in winding of a band plate by the winder can be resolved. [Tenth Embodiment] Fig. 24 is a front view of a band plate winding system showing a tenth embodiment. Fig. 25 is a side view taken on line VIII-VIII of Fig. 24. To a work-side pivoting frame 518b for supporting the unit roll 516b in the previous embodiment, a parallel partition wall 530 is integrally joined, with spacing, by a joining plate 531, as shown in Figs. 34 and 35. A mandrel front end support device 520 is provided on a support base 522 in a spacing portion between the pivoting frame 518b and the partition wall 530. The reference numeral 532 denotes a driving system for the unit roll 516b, the driving system being constituted to have the partition wall 530 as an intermediate support point. The unit roll driving system 532 comprises upper and lower connecting boxes 534, 535 each containing a bevel gear 533 and fixed to an outer surface of the partition wall 530; a transmission shaft 536c connected between the upper connecting box 534 and the unit roll 516b via universal joints 527 and nearly parallel to an axis of a mandrel; a transmission shaft 536b connected between the upper and lower connecting boxes 534 and 535; and a transmission shaft 536a for connecting the lower connecting box 535 to a driving motor 526. The shaft between the upper and lower connecting boxes 534 and 535 may be replaced by multi-stage transmission gears. In Figs. 24 and 25, only the driving system 532 for the unit roll 516b is shown, but the other unit rolls 516a, 516c and 516d can also be constituted in the same fashion. With the above-described band plate winding system, a driving force of the driving motor 526 rotationally drives the unit roll via the transmission shafts 536a, 536b and 536c. At this time, the transmission shaft 536c is nearly parallel to the mandrel axis, or the upper connecting box 534 is situated slightly externally. This configuration makes it easy to retain the spacing between the transmission shaft 536c and the mandrel front end support device 520 at the time of driving of the driving system 532 and during turning of the unit roll 516b for retraction. Furthermore, the lower connecting box 535 can be placed near the unit roll 516b and a support shaft 517b for the support frame 518b. Thus, the angle of inclination of the transmission shaft 536a for advancing and retracting the unit roll becomes small. Consequently, the driving motor 526 can be located at a near position, and the driving system 532 can be constructed in a small size. Industrial Applicability As described above, the band plate winding system of the present invention comprises the features defined in appended claim 1. Thus, a band plate can be wound under high speed rolling to a degree comparable to that using a down coiler. Also, the scale of equipment, the size of an installation space, and the cost of equipment can be markedly decreased because of the concomitant use of the carrousel type winder. Hence, this band plate winding system is preferred for use in hot rolling equipment.

Claims: A band plate winding system comprising: a carrousel type winder (210, 406) having a plurality of individually driven mandrels (212, 488) on a circular support frame (211, 407) provided so as to be rotationally drivable in a vertical plate; and a single roll type wrapping device (110) for supporting a plurality of unit rolls (120, 120', 259, 459 ) each unit roll (120, 120', 259, 459) provided so as to be movable forward and backward between a position surrounding the mandrel (212, 408) located at a winding start position of the winder (210) and a retreat position, characterized in that for each unit roll (120, 120', 259, 459) there is provided a presser plate, which presses the band plate against the mandrel (212, 408), the single roll wrapping device (210) further comprises a plurality of frames on which a unit roll (120, 120', 259, 459) and a presser plate is attached, one of the frames comprises at a front position and at an intermediate position thereof two panel-like arms, connected at one end onto the frame by shafts, at least one panel-like arm of the frame comprising a unit roll (120, 120', 259, 459), and a presser plate, wherein between an intermediate position of this panel-like arm and the frame, a small cylinder is provided for pressing the unit rolls (120, 120' 259, 459) and the presser plate against a surface of each drive mandrel (212, 408). The band plate winding system of claim 1, wherein the winding start position for winding by the mandrel of the winder is at the same level as a height of a pass line of a band plate. The band plate winding system of claim 1, wherein the roll type wrapping device that supports the plurality of unit rolls is provided on a common shaft of a support base.

Inventors: MIYAGUCHI KANEHISA, SHIBATOMI NOBUHIRO, MIYAGUCHI, KANEHISA, SHIBATOMI, NOBUHIRO
Applicants: MITSUBISHI HEAVY IND LTD, MITSUBISHI HEAVY INDUSTRIES, LTD.
Application year: 1998
Main classification: B21C47
IPC codes: B21C47