JP3148557U - Uncoiler - Google Patents

Abstract

In an uncoiler for rewinding a steel sheet coil, the winding curve at the tail end of the steel sheet that is greatly curved is corrected so that the unwinding can be performed without scratching an opener or a pinch roll. An uncoiler is configured such that a steel sheet unwound from a steel sheet coil A is fed into a pair of upper and lower pinch rolls 7a and 7b through the upper surface of an opener 3 and supplied to the next process from the pinch rolls 7a and 7b through a leveling roll 9. , The steel sheet tail end fed out immediately before the end of rewinding is corrected in front of the opener 3 by a pair of upper and lower correction rolls 5 and 6, and then sent to the pinch rolls 7 a and 7 b through the opener 3 to be wound. Damage to the opener 3 and the pinch rolls 7a and 7b due to scissors is prevented. [Selection] Figure 1

Description

  The present invention relates to an uncoiler that unwinds a steel sheet coil that is wound in a coil shape and sends it to the next process such as a cutting process.

  As an uncoiler that unwinds a steel plate coil and sends it out to the next process such as a cut process or a press process from a leveling roll that corrects the curl, for example, an apparatus as described in Patent Document 1 is generally employed. . This uncoiler includes a snubber roll that abuts on the upper peripheral portion of the steel sheet coil, an opener (peeler) that is provided with a claw at its tip so as to expand and contract toward the steel sheet coil, and a downstream of the opener. A pair of upper and lower pinch rolls disposed on the side and a leveling roll disposed on the downstream side of the pinch roll are provided.

  When the steel plate coil is rewound, the snubber roll is lowered and brought into contact with the upper peripheral portion of the steel plate coil, and the opener is operated after the tip portion of the steel plate coil is protruded from the snubber roll to the opener side. The claw is positioned below the front end of the steel sheet coil, and the steel sheet coil is rewound in this state, thereby feeding the front end of the unwound strip steel sheet to the pinch roll side along the upper surface of the opener. The pinch roll is supplied to the leveling roll to correct the curl and carry it into the next process.

JP-A-5-237544

  However, since the strip-shaped steel sheet unwound from the steel sheet coil is curved in an arc shape with a degree of curvature corresponding to the winding diameter in the state of being wound around the steel sheet coil, If the pinch roll is fed through the upper surface of the opener in a generated state, the leading end as the unwinding end and the tail end as the terminating end will move downward and bend downward and bend downward. There is a possibility that not only the opener is damaged by the leading end surface, but also the pinch roll is broken.

  In particular, the unwinding tail end of the steel sheet coil is wound around the smallest diameter part of the steel sheet coil, i.e., the innermost layer. Therefore, when it is sent out on the opener in this state, the end surface of the curved tail end is slid against the upper surface of the opener, and the opener is damaged in a short period of time and the pinch roll is damaged. May also be damaged.

  The present invention has been made in view of such problems. The purpose of the present invention is to unwind the rewind tail end immediately before being fed to the opener when rewinding the steel sheet coil. It is to provide an uncoiler that is actively corrected to prevent damage to the opener and pinch roll.

  In order to achieve the above object, an uncoiler according to the present invention includes, as described in claim 1, a main shaft that rotatably supports a steel sheet coil, and a lower shaft that moves downward when the steel sheet coil is rewound. A snubber roll that presses the upper periphery and feeds the tip of the steel sheet that has been rewound to a pinch roll disposed downstream, and projects toward the tip of the steel sheet coil that is drawn from the snubber roll during rewinding. An opener that peels the tip from the steel sheet coil and feeds the rewinded steel sheet to the pinch roll using the upper surface as a guide surface, and winding of the steel sheet tail end of the steel sheet coil that is unwound from the main shaft just before the end of rewinding. A pair of upper and lower correction rolls for correcting the heel before feeding the opener on the pair of upper and lower correction rolls. The straightening roll on the side is arranged so that it can be moved up and down, while the straightening roll on the lower side is rotatable about the tip of an arm that rotates in the vertical direction with a support shaft provided below the straightening roll as a fulcrum. The steel plate tail end is supported with the lower correction roll approaching the upper peripheral surface of the lower peripheral surface of the upper correction roll that has been supported and lowered during the correction of the steel plate tail end portion, and the lower peripheral surface of the upper correction roll as a fulcrum. It is comprised so that it may curve in the direction which cancels the curl of a part.

  In the uncoiler configured as described above, the invention according to claim 2 is configured so that the steel plate coil supported by the main shaft advances and retreats from above in the radial direction, and the upper surface on the outer peripheral surface of the steel plate coil that has stopped rotating at the start of rewinding. A coil presser for pressing the peripheral part is provided.

  According to the first aspect of the present invention, the snubber roll moves downward when the steel plate coil is rewound to press the upper peripheral portion of the outer peripheral surface of the steel plate coil, and from this state, the tip of the steel plate coil is on the downstream side through the opener. On the other hand, the opener protrudes toward the tip of the steel sheet coil drawn from the snubber roll when the steel plate coil is rewound, and the tip is pushed to the steel plate coil. Since the upper surface of the steel sheet is peeled from the steel sheet coil and is fed into the pinch roll with the upper surface as a guide surface, the snubber roll is pushed by an opener that sinks into the lower surface of the front end portion of the steel sheet coil during rewinding. Bending in the direction to correct curl as a fulcrum, to correct curl even in a relatively thick steel plate In addition, it is configured so that the straightened steel sheet tip is fed to the pinch roll through the opener by rotating the snubber roll, so that the pinch roll can be applied to the pinch roll without damaging the opener and without damaging the pinch roll. It is possible to make sure to pinch and start rewinding.

  And a pair of upper and lower straightening rolls that correct the curl at the tail end of the steel sheet coil that is fed from the main shaft just before the end of rewinding, before the above-mentioned opener is fed. The straightening roll is arranged so that it can be moved up and down, while the lower straightening roll is pivotally supported at the tip of an arm that rotates in the vertical direction with a pivot provided below the upper straightening roll as a fulcrum. The lower correction roll is brought close to the upstream peripheral surface of the lower peripheral surface of the upper correction roll that has been lowered during the correction of the steel tail end, and the steel sheet tail end is wound around the lower peripheral surface of the upper correction roll as a fulcrum. Since it is configured to bend in a direction to eliminate wrinkles, the winding wrinkles at the tail end of the steel sheet wound on the innermost layer of the steel sheet coil have a large degree of curvature, although they have a large degree of curvature. Even if the steel sheet can be bent in a direction opposite to the bending direction by the roll and the steel plate is relatively thick, the curl can be corrected smoothly and reliably, so that an opener can be brazed or a pinch roll. The pinch roll can be passed through the opener as a guide without damage.

  Further, according to the invention according to claim 2, the steel plate coil supported by the main shaft is advanced and retracted from above in the radial direction, and the upper peripheral portion of the outer peripheral surface of the steel plate coil being stopped at the start of rewinding is pressed. Since the coil presser is provided, the collapse of the steel sheet coil at the start of rewinding can be prevented.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a simplified side view of an uncoiler, FIG. 2 is a perspective view of a part thereof, and the uncoiler rotatably supports a steel plate coil A. The main shaft 1, the snubber roll 2 that presses the upper peripheral portion of the outer peripheral surface of the steel sheet coil A, and the strip steel plate A ′ that is peeled off from the outer peripheral surface of the steel sheet coil A and unwound. An opener 3 that guides the upper surface thereof and feeds it downstream, a coil presser 4 that holds the upper peripheral portion of the steel sheet coil A on the near side of the snubber roll 2, that is, on the opposite side to the rewinding direction, and the steel sheet coil A A pair of upper and lower straightening rolls 5 and 6 for correcting the curl of the tail end a2 of the strip-shaped steel plate A ′ fed out immediately before the end of the unwinding in front of the opener 3 and the strip-shaped steel plate A ′ fed from the opener 3 A pair of upper and lower pinch rolls 7a for feeding to the downstream side nipped by the base end position near Puna 3, and 7b, and a sensor 8 which detects the remaining amount of the steel sheet coil A.

  The uncoiler frame 10 includes a pair of front vertical frames 12 and 12 erected on both sides of the front end of the base 11, and a pair of rear vertical frames erected on both sides of the front end of the base 11. 13 and 13, front and rear upper and lower horizontal frames 14 and 15 respectively connecting the upper ends of the pair of front vertical frames 12 and 12 and the upper ends of the pair of rear vertical frames 13 and 13, respectively, and the vertical frames facing the front and rear It is composed of both lateral frames 16 and 17 connecting the upper ends of 12 and 13, and the length direction of the central part in the space surrounded by the machine frame 10 is perpendicular to the front-rear direction. The main shaft 1 is disposed toward the head. The main shaft 1 is rotated in the rewinding direction of the steel sheet coil A by a motor 18 (shown in FIG. 2).

  The snubber roll 2 includes both side arm members 22 and 22 projecting rearward from both end portions of a rotating shaft 21 rotatably supported between upper end portions of front vertical frames 12 and 12 in the machine frame 10. Both end portions are rotatably supported between the projecting end portions (tip portions). Specifically, the both side arm members 22 and 22 have their base end portions (front end portions) fixed to both side end portions in the length direction of the rotating shaft 21, and are directed from the rotating shaft 21 to above the steel sheet coil A. The snubber roll 2 that protrudes rearward and is pivotally supported between the protruding ends is disposed on the rear peripheral surface portion of the upper peripheral portion of the steel plate coil A supported by the main shaft 1 so as to be able to be rolled down. The motor 23 is installed on the arm member 22, and the snubber roll 2 is rotationally driven by the motor 23.

  Further, the base end portion of the lever 24 is fixed to both side end portions of the rotating shaft 21, and the piston rod 26 of the hydraulic cylinder 25 installed on the side surfaces of the front vertical frames 12, 12 is attached to the tip end portion of the lever 24. The snubber roll 2 is pivoted and moved vertically by the operation of the hydraulic cylinder 25 so that it can be crimped to and detached from the rear peripheral surface portion of the upper peripheral portion of the steel plate coil A.

  The opener 3 includes a hollow frame 31 having a rectangular shape with a certain length and an upper surface formed in a flat surface, and a claw member 32 accommodated in the hollow frame 31 so as to be able to protrude and retract forward. And a hydraulic cylinder 33 for projecting and retracting the claw member 32 forward from the hollow frame 31, and the width between both side ends of the hollow frame 31 is formed smaller than the steel plate width of the steel plate coil A. A front end portion (front end portion) is directed to a center portion in the width direction of the steel sheet coil A with respect to the rear side peripheral portion of the outer peripheral surface of A, and the base end portion (rear end portion) is a rear vertical frame. A base part 11a located behind 13 and 13 is pivotally mounted 34 so as to be rotatable in the vertical direction.

  Further, the tip of the claw member 32 facing the rear peripheral portion of the steel plate coil A is formed in a wedge-shaped end, and the claw member 32 is moved in the front-rear direction along the inner surface of the hollow frame 31. The hydraulic cylinder 33 is attached to the lower part of the hollow frame 31, and the hollow frame 31 stands on the rear end of the base 11 of the machine frame 10 in the middle portion in the longitudinal direction on the lower surface. The piston rod 36 of the hydraulic cylinder 35 mounted in the installed state is connected, and the operation of the hydraulic cylinder 35 is configured to rotate in the vertical direction with the pivot portion 34 as a fulcrum.

  The coil presser 4 is installed between a plurality of hydraulic cylinders 41 mounted on the front upper side horizontal frame 14 of the machine frame 10 at predetermined intervals in the length direction, and between the tips of the piston rods 42 of these hydraulic cylinders 41. It is composed of a horizontal frame member 43 having a rectangular cross section fixed in a state, and a hard wooden belt plate member 44 that is replaceably attached to the lower surface of the horizontal frame member 43, and is supported by the piston rod 42 as a main shaft. By extending and contracting from above in the radial direction of the steel plate coil, the strip plate material 44 is pressed onto the front peripheral surface portion of the upper peripheral portion of the steel plate coil A supported by the main shaft 1 at the time of extension.

  In the pair of upper and lower straightening rolls 5 and 6 for correcting the curl of the tail end portion a2 of the strip-shaped steel plate A ′ fed out just before the end of the rewinding of the steel sheet coil A, the upper straightening roll 5 is disposed so as to be movable up and down. On the other hand, the lower correction roll 6 is rotatably supported at the tip of an arm 62 that rotates in the vertical direction with a support shaft 61 provided below the upper correction roll 5 as a fulcrum.

  Specifically, hydraulic cylinders 51, 51 are vertically mounted on the upper ends of both vertical frames 13, 13 on the rear side of the machine frame 10, and piston rods 52 projecting downward in the hydraulic cylinders 51, 51. The bearing members 53 and 53 are fixed to the tips of the shafts 52, the upper correction roll 5 is rotatably supported between the bearing members 53 and 53, and the piston rods 52 and 52 of the hydraulic cylinders 51 and 51 are contracted. By causing the upper straightening roll 5 to stand by at the upper position, by extending it, the steel plate tail end a2 of the steel sheet coil A fed from the main shaft 1 is lowered to the hollow frame of the opener 3 Immediately before being fed onto the body 31, the upper surface of the steel plate tail end portion a2 is pressed downward.

  On the other hand, the lower correction roll 6 rotates both end portions of the support shaft 61 to brackets (not shown) protruding from the lower end front surfaces of the rear vertical frames 13 and 13 of the machine frame 10. The base end portions (rear end portions) of the arms 62 and 62 are fixed to the both side end portions of the support shaft 61 with a space larger than the width of the hollow frame 31 of the opener 3. A shaft 63 is rotatably supported between the ends (front ends) of the arms 62 and 62 protruding forward from the support shaft 61. Then, by rotating the arm 62 downward about the support shaft 61, the lower correction roll 6 is made to stand by on the rear side of the lower peripheral portion of the steel sheet coil A, and by rotating upward, the upper correction roll 6 The steel plate tail end a2 is flattened by approaching the upstream peripheral surface of the lower peripheral surface and curving upward in a direction to eliminate the curl of the steel plate tail end using the lower peripheral surface of the upper correction roll 6 as a fulcrum. It is comprised so that it may correct to the edge part shape of a strip.

  As the means for rotating the arm 62, a pinion 64 is fixed to the end of the support shaft 61, and a hydraulic cylinder 65 is attached to the lower part of the rear vertical frame 13 in the machine frame 10, and a piston rod of the hydraulic cylinder 65 is provided. Although a structure in which a rack 67 screwed to the pinion 64 is connected to the tip of 66 is adopted, other rotating means may be used.

  In addition, the pair of upper and lower pairs is located at a position close to the base end portion of the hollow frame body 31 of the opener 3 on the base portion 11a that rotatably supports the base end portion of the hollow frame body 31 of the opener 3. The pinch rolls 7a and 7b are arranged, and these pinch rolls 7a and 7b are disposed rearward while sandwiching the strip steel plate A ′ that is actively rotated by the motor drive and is fed along the upper surface of the opener 3. It is configured to be fed into the leveling roll 9 provided.

  The operation of the uncoiler thus configured will be described. First, the steel plate coil A is placed on a coil car (not shown) and carried to the uncoiler, and the steel plate coil A is set on the main shaft 1 of the uncoiler. Next, by actuating the snubber roll moving hydraulic cylinder 25 and extending the piston rod 26, the both side arm members 22, 22 are rotated downward via the lever 24, and the shaft between the both side arm members 22, 22 is pivoted. The supported snubber roll 2 is crimped onto the rear peripheral surface portion of the upper peripheral portion of the steel sheet coil A, and in this state, a band (not shown) bonded to the outer peripheral surface of the steel sheet coil A is cut. After the steel plate coil A can be rewound, the steel plate coil A is rotated by the main shaft 1 and the snubber roll 2 is rotated by the motor 23 in synchronization with the rotation. The rewinding start end a1 of the coil A is pulled out from the snubber roll 2, and the rotation is stopped in this state.

  Thereafter, the coil presser moving hydraulic cylinder 41 is actuated to extend the piston rod 42, thereby pressing the coil presser 4 on the front peripheral surface portion of the upper peripheral portion of the steel plate coil A to prevent the steel plate coil A from being collapsed. In this state, as shown in FIG. 4, the hollow frame 31 of the opener 3 is rotated in the vertical direction by the operation of the hydraulic cylinder 35 with the pivoting portion 34 at the base end as a fulcrum. The extension direction of the upper surface of the hollow frame body 31 is directed to the rewinding start end a1 of the steel sheet coil A drawn from the snubber roll 2, and the piston is moved by operating the hydraulic cylinder 33 mounted in the hollow frame body 31. By extending the rod, the claw member 32 is protruded forward from the hollow frame body 31 and the tip thereof is rewound into the lower surface of the starting end a1 and the hollow frame body 31 is moved slightly upward. Rukoto way, and to separate as to peel off the start end a1 back-out the winding from the outer peripheral surface of the steel sheet coil A, and the state was placed on the pawl member 32.

  After this state, the coil presser 4 is moved away from the steel plate coil A by the operation of the hydraulic cylinder 41, and then the snubber roll 2 is rewound in the rewind direction while rotating the steel plate coil A in the rewind direction and synchronizing with the rotational peripheral speed. The pair of upper and lower pinch rolls 7a facing the rear end of the hollow frame 31 while sliding on the upper surface of the hollow frame 31 with the upper surface of the hollow frame 31 as a guide. 7b, and the unwinding start end a1 is held between these pinch rolls 7a and 7b as shown in FIG.

  At this time, the unwinding start end portion a1 of the steel sheet coil A is wound around the maximum diameter portion of the steel sheet coil A, that is, the outermost layer, so that the curvature radius is large and the degree of curvature curved in an arc shape is moderate. Therefore, when the wedge-shaped claw member 32 of the opener 3 is inserted into the inner surface of the opener 3 when the unwinding start end a1 is peeled off from the steel plate coil A, the unwinding start end a1 is pressed against the outer peripheral surface of the steel plate coil A. Even if the steel plate is bent in the opposite direction to the bending direction with the lower peripheral surface of the snubber roll 2 as a fulcrum and is relatively thick, it moves slowly on the hollow frame 31 while being corrected to a substantially flat strip shape. Thus, the hollow frame body 31 can be smoothly and reliably fed between the pinch rolls 7a and 7b without the upper surface of the hollow frame body 31 and without the pinch rolls 7a and 7b.

  After that, by operating the snubber roll moving hydraulic cylinder 25 and contracting the piston rod 26, both arm members 22, 22 are rotated upward via the lever 24, and the snubber roll 2 is separated from the steel plate coil A. By rotating the main shaft 1 in a state, the steel sheet coil A is rewound, and the steel sheet coil A is fed backward at a constant speed as a strip steel sheet A ′, and as shown in FIG. 'Is fed to the rear leveling roll 9 by rotating the pinch rolls 7a and 7b while sliding on the hollow frame 31, and this leveling roll 9 is passed through while correcting the curl of the strip steel plate A'. Sent to the cutting processing means or the like.

  As the steel sheet coil A is rewound, the winding diameter becomes smaller, and the upper surface of the hollow frame 31 is rotated in the tangential direction with respect to the outer peripheral surface of the steel sheet coil A while rotating the opener 3 downward accordingly. The steel plate A ′ is smoothly fed into the pinch rolls 7a and 7b along the upper surface while receiving the steel plate A ′.

  When the remaining amount of the steel sheet coil A is reduced, a signal is sent from the detection sensor 8 for detecting the remaining amount to the hydraulic cylinders 51 and 65 for operating the straightening rolls 5 and 6. The hydraulic cylinder 51 is actuated to move the upper straightening roll 5 downward and press against the upper surface of the strip steel plate A ′ fed from the main shaft 1 onto the hollow frame 31 of the opener 3. Next, after a lapse of a certain short time from the downward movement of the upper leveling roll 5, the hydraulic cylinder 65 is actuated to advance the rack 67 integrally connected to the piston rod 66, and the pinion 64 is rotated to move the arm. The lower correction roll 6 pivoted on the tip of the arm 62 is rotated upward with the support shaft 61 as a fulcrum, and the front peripheral surface portion of the lower peripheral surface of the upper correction roll 5, that is, the upstream side. The steel plate tail end portion a2 of the strip steel plate A ′ passing between the top and bottom straightening rolls 5 and 6 is corrected to a substantially flat strip shape by making the top and bottom straightening rolls 5 and 6 approach each other. .

  Since the unwinding tail end a2 of the steel sheet coil A is wound around the smallest diameter portion of the steel sheet coil A, that is, the innermost layer, the curvature radius is small and the curvature of the arc is a sharp curve. For this reason, when it is fed out onto the hollow frame 31 of the opener 3 in this state, it slides on this upper surface while the end surface of the curved tail end a2 is pressed against the upper surface of the hollow frame 31. Since the hollow frame body 31 may be damaged and the pinch rolls 7a and 7b may be broken, as described above, the steel plate tail that is largely curved as described above immediately before being fed to the hollow frame body 31 side. The end a2 is corrected to a substantially flat strip shape by the vertical correction rolls 5 and 6.

  Specifically, the lower correction roll 6 is moved upward in a state where the upper surface of the steel plate tail end portion a2 is pressed downward by the upper correction roll 5, and the front peripheral surface portion of the lower peripheral surface of the upper correction roll 5 is moved upward. 7 and 8 with the lower peripheral surface of the upper straightening roll 5 as a fulcrum, as shown in FIGS. 7 and 8. The rear straight surface portion on the upper peripheral surface of the lower straightening roll 6 is curved in a direction opposite to the arcuate bending direction of the steel plate tail end portion a2, that is, in a direction to eliminate the curl of the steel plate coil A. Corrected into a flat strip.

  The steel plate tail end a2 thus corrected is fed to the pinch rolls 7a and 7b while sliding the lower surface thereof in a surface contact state with the upper surface of the opener 3, and the pinch roll 7a is not caught by the pinch rolls 7a and 7b. , 7b can be smoothly passed and supplied to the next processing apparatus on the rear side.

A partially cutaway simplified side view of an uncoiler. The simplified perspective view of the one part. The simplified side view of the state which pulled out the rewind start end part from the snubber roll. The simplified side view of the state which made the rewind start end part peel from the steel plate coil. The simplified side view of the state which sent the rewind start end part to the pinch roll. The simplified side view of the state which has rewound the steel plate coil. The side view of the state which is correcting the steel plate tail end part. The enlarged side view.

Explanation of symbols

A Steel sheet coil
a1 Rewind start end
a2 Steel plate tail 1 Spindle 2 Snubber roll 3 Opener 4 Coil presser 5 Upper straightening roll 6 Lower straightening roll
7a, 7b Pinch roll 8 Detection sensor 9 Leveling roll

Claims (2)

  A main shaft that rotatably supports the steel sheet coil, and a lower end of the steel sheet coil that is moved downward during the rewinding of the steel sheet coil to press the upper peripheral portion of the outer peripheral surface of the steel sheet coil and disposed at the downstream side. A snubber roll that is fed to a pinch roll, and protrudes toward the tip of the steel sheet coil that is drawn from the snubber roll during rewinding, and the tip is peeled off from the steel sheet coil. As a pair of upper and lower correction rolls that correct the winding rods of the steel sheet tail end portion of the steel sheet coil fed out from the main shaft just before the end of rewinding before the above-mentioned opener is fed. The upper correction roll of the pair of upper and lower correction rolls is arranged so that it can be moved up and down while the lower correction roll is on the upper side. On the lower peripheral surface of the upper correction roll, which is rotatably supported at the tip of an arm that rotates in the vertical direction with a support shaft provided below the normal roll as a fulcrum, and descends when the steel plate tail end is corrected An uncoiler characterized in that the lower correction roll is brought close to the upstream peripheral surface and is bent in a direction to eliminate the curl at the tail end of the steel sheet with the lower peripheral surface of the upper correction roll as a fulcrum. .   A coil presser is provided that moves forward and backward in the radial direction of the steel sheet coil supported by the main shaft and presses the upper peripheral portion of the outer peripheral surface of the steel sheet coil that is stopped when starting rewinding. Item 1. An uncoiler according to item 1.

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