JP2008036689A - Apparatus for unwinding and guiding steel strip on entry side of steel strip continuous processing line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for unwinding and guiding a steel strip capable of preventing the occurrence of the damage of a belt in an apparatus for guiding a steel strip, which is equipped with a magnet type belt conveyor for guiding a steel strip to a pinch roll from a steel strip coil, due to collison or bit of the tip or the tail end of the steel strip to the belt, and capable of stably maintaining a function of guiding the steel strip. <P>SOLUTION: A belt conveyor 3 is turnable about a supporting shaft 91. In the conveyor 3, the inclined surface rear end thereof has an apron 5 projecting on the belt surface at the front, and both right and left sides thereof have side guide members 7, 7. The belt conveyor 3 has such a lifting structure that the side guide members 7, 7 are lifted at a higher position than the belt surface in a state of being turned to a standby position P2, while being lowered at a lower position than the belt surface in a state of being turned to a tip of the steel strip guiding position P1. The apron 5 prevents the tip of the steel strip unwinding from a coil SC from colliding with the belt 31, the tail end of the steel strip is loaded at a position above the belt surface of the side guide members 7, 7, thereby preventing the tail end part from hitting to the belt 31 as well. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a steel strip winding for guiding a steel strip squeezed out from a steel strip coil toward a pinch roll between a steel strip coil mounted on a payoff reel and a pinch roll on the steel strip continuous processing line. The present invention relates to a delivery guide device.

As a typical steel strip unwinding guide device that guides a steel strip unwound from a steel strip coil of a pay-off reel toward a pinch roll on the entry side of a steel strip continuous processing line (for example, a continuous heat treatment line), a magnet type An apparatus using a belt conveyor is known.
In FIG. 7, 3 is a magnet type belt conveyor. The belt (31) of the conveyor (3) is rotated by an electric motor (not shown), and a magnet (32) is placed in the lower space of the belt (31). Is arranged. The steel strip tip (SH) unwound from the steel strip coil (SC) is attracted and held on the belt (31) by the magnet (32) and guided to the pinch roll (2).

  The belt conveyor (3) is held by the holding frame (4) and supported and fixed to the rotating base (9). The rotating base (9) is supported by the horizontal support shaft (91) and at the lower end side. Further, a rotary drive device (92) such as a hydraulic cylinder is connected via a shaft (93). The belt conveyor (3) is rotated (swinging) about the horizontal support shaft (91) together with the rotating base (9) by the hydraulic cylinder (92). Move up and down between P1) and the lower standby position (P2). The belt conveyor (3) in the illustrated example is provided with an outlet device (10) that scoops the steel strip tip (SH) from the coil (SC) as an auxiliary means. The lead-out device (10) is moved back and forth between the steel strip tip guide position (P1) and the lower standby position (P3) by an advance / retreat drive device (12) such as a hydraulic cylinder installed on the rotating base (9). Moving.

  When starting the unwinding of the steel strip, the belt conveyor (3) is rotated to the steel strip unwinding position (P1) that matches the outer diameter of the steel strip coil (SC) and the feeding device ( 10) Advance to the front of the belt conveyor (3). Next, when rotation of the payoff reel (1) is started, the steel strip tip (SH) moves from the apron (5) at the front of the conveyor to the belt (31) via the lead device (10), and the belt (31) It advances while being attracted and held (magnetically attracted) on the surface, and is sandwiched between the pinch rolls (2) through the guide table (6) at the rear of the conveyor. When the steel strip tip (SH) is sandwiched between the pinch rolls (2), the steel strip (S) is in tension (indicated by chain lines), so the belt conveyor (3) and the spout device (10) have finished their roles. Retreat to each standby position (P2) (P3).

The method of unwinding the steel strip from the steel strip coil includes upper unwinding (overpass) and lower unwinding (underpass). FIG. 7 shows unwinding by upper unwinding. Regarding the steel strip unwinding guide device: (a) A magnet type belt conveyor is rotatably provided with the pinch roll side as a fulcrum, and a guide table parallel to the belt conveyor is disposed below the belt conveyor. An apparatus (Patent Document 1) in which a steel strip unrolled from a steel strip coil is sandwiched between a belt conveyor and a guide table and guided to a pinch roll, (b) From a steel strip coil to a pinch roll Two upper and lower rails (upper rail and lower rail) are provided so as to be pivotable with the pinch roll side as a fulcrum across the steel strip passage to the top, and the top end of the steel strip unrolled from the steel strip coil is A device (Patent Document 2) that is guided by being sandwiched between a presser provided on a roll and a lower carriage provided on a lower roll, (c) a pair of steel strips that are pulled out from a steel strip coil Magnetic beltco The unbearer and threading plate guide are arranged so as to be pivotable around the pinch roll side, and the steel strip is guided by the belt conveyor and threading plate guide to cope with both unwinding and unrolling of the steel strip. An apparatus that can be used (Patent Document 3) has been proposed.
Japanese Utility Model Publication No. 05-033906 Japanese Utility Model Publication No. 05-0491117 JP 2005-279724 A

In the steel strip unwinding device shown in FIG. 7, there is a problem that the belt (31) of the belt conveyor (3) is likely to be damaged (eg, broken or broken). As shown in FIG. 8, this belt damage occurs when the steel strip tip (SH) collides with the belt (31) at the start of unwinding of the steel strip, and at the end of unrolling of the steel strip, as shown in FIG. This is because the tail end (ST) passes while striking the belt (31). The steel strip (S) unrolled from the coil (SC) has a warp (due to the coil winding), and the tip (SH) and tail end (ST) of the steel strip unwound by over unwinding (overpass) ) Exhibits a warped shape curved toward the belt surface, and therefore, the impact of the collision and hitting on the belt (31) is large.
If the belt (31) breaks, the steel strip cannot be transferred to the pinch roll (2), and sudden replacement work is required. Even if the belt (31) is partially damaged, the guide function of the belt conveyor (3) may be lowered. For example, the magnet (32) against the steel strip on the belt due to partial breakage. If the adsorbing force is biased, the straightness of the steel strip deteriorates, which may cause an accident such as meandering of the steel strip and narrowing of the pinch roll (2) resulting therefrom.

  As a measure to prevent damage to the belt (31), it is conceivable to change the design of the material and shape of the belt (generally made of thick nylon cloth), but the actual operation in which the collision and striking of the tip and tail ends of the steel strip are repeated It is difficult to be a sufficient measure against the conditions. Alternatively, instead of the belt conveyor (3), a round bar guide plate with round bars spanned at regular intervals or a guide plate (bearing guide plate) with many free ball bearings distributed on the board is used. It is also possible to do. However, because the former (round bar guide plate) has poor sliding, the surface of the steel strip is likely to wrinkle, and in the latter (bearing guide plate), the steel strip tends to meander (the straightness of the steel strip is poor), so Troubles such as squeezing are likely to occur during pinching, and neither is an effective measure.

In the steel strip guide device described in Patent Document 1, the belt conveyor is arranged on the upper side of the coil, and the steel strip tip (SH) unwound from the coil is unrolled to the upper surface side (the coil winding mechanism). It is constructed so that it is sucked and held on the belt from the back side of the bend) and guided to the pinch roll, and the structure is different from the guide device targeted by the present invention, suggesting a solution to the above problem of the present invention Not what you want. The guide device of Patent Document 2 does not use a belt conveyor and has a different configuration from the present invention. Moreover, the guide device of patent document 3 is a structure which guides a steel strip by making a belt conveyor face a steel strip coil from the upper surface side with respect to an upper unrolling steel strip, and the lower surface side with respect to a lower unrolling steel strip. (Thus, in both cases of unwinding and unwinding, the warp of the steel strip due to the winding of the coil presents a curve facing away from the belt surface.) The guide device is different in structure and does not suggest the solution of the present invention.
The present invention effectively avoids the impact of the front and rear ends of the steel strip on the conveyor belt and the resulting belt damage, and allows the guide function to be stably maintained over a long period of time. A device is provided.

The present invention is arranged between a steel strip coil mounted on a payoff reel and a pinch roll on the inlet side of a steel strip continuous processing line, and a steel strip that is unrolled from the steel strip coil is used as the pinch roll. A steel strip unwinding guide device equipped with a magnetic belt conveyor to be transferred to
The magnetic belt conveyor (3) uses the pinch roll side as a fulcrum, and the steel strip tip guide position (P1) at the start of unwinding of the steel strip and the standby position after the steel strip tip is pinched by the pinch roll (P2 ) To be able to rotate vertically between
An apron (5) having a rear end protruding above the belt surface and having an inclined surface inclined downward toward the front end side is provided at the front portion of the belt conveyor (3), while the belt conveyor (3) Side guide members (7, 7) are arranged opposite to each other on the left and right sides of the belt, and the side guide members (7, 7) are rotated by the belt conveyor (3) to the standby position (P2) below. Elevated displacement structure that rises to a position higher than the belt surface in the state, and descends to a position lower than the belt surface when rotated to the steel strip tip guide position (P1),
The tip of the steel strip rolled out from the steel strip coil is directly applied to the belt of the belt conveyor (3) along the inclined surface of the apron (5) of the belt conveyor (3) located at the steel strip tip guide position (P1). It moves to the pinch roll while adsorbed and held on the surface of the belt without colliding, and the side guide members (7, 7) of the belt conveyor (3) where the side edges of the steel strip are located at the standby position (P2). ) And moved toward the pinch roll.

  The side guide members (7, 7) are made of, for example, a plate-like body having a length from the front end side to the rear end side of the belt conveyor (3), and are oriented in parallel to the belt conveyors attached to the respective one side edges. The pushers (8, 8) for rotating the side guide members (7, 7) are arranged on the left and right sides of the belt conveyor (3) so as to be rotatable about the support shafts (71, 71) of the belt. Installed below each side guide member, when the belt conveyor (3) is turned to the standby position (P2), it is pushed up by the pushers (8, 8) and rises to a position higher than the belt surface. In the state rotated to the front end guide position (P1), it is configured to move away from the pushers (8, 8) to a position lower than the belt surface of the belt conveyor (3).

  When the belt conveyor (3) is turned to the steel strip tip guide position (P1) and unwinding of the steel strip is started, the tip (SH) of the steel strip drawn out from the coil (SC) Since it moves along the inclined surface (5f) of the apron (5) (the rear end of the inclined surface protrudes higher than the belt surface), it does not directly collide with the belt (31), but directly on the belt (31). Transition (FIG. 5). At this time, the side guide members (7, 7) are lowered to a position lower than the belt surface. It is held and guided straight to the pinch roll (2). On the other hand, the belt conveyor (3) after the steel strip tip (SH) is sandwiched between the pinch rolls (2) has already moved to the predetermined standby position (P2), and the side guide members (7, 7) Is protruding higher than the belt surface. For this reason, the steel strip tail end (ST) squeezed out from the coil (SC) is supported by the side guide members (7, 7) at the left and right end edges, and the pinch roll without hitting the belt (32). (2) (FIG. 6).

In this way, the collision (FIG. 8) and the striking (FIG. 9) of the tip (SH) and tail (ST) of the steel strip against the belt are avoided, so that the belt (31) is prevented from being damaged. The guide function of the belt conveyor (3) is maintained for a long time.
In addition, the side guide members (7, 7) that prevent the steel belt tail end (ST) from hitting the belt (31) are moved up and down (up and down movement to a position lower and higher than the belt surface) by a belt conveyor ( Since it can be performed using the rotating motion of 32), it does not require actuator equipment and the structure is simple.

FIG. 1 shows an embodiment of the steel strip unwinding guide apparatus of the present invention. The same members as those in FIG. 7 are denoted by the same reference numerals.
The belt conveyor (3) has an inclined surface (5f) in which an apron (5) provided at the front is inclined downward from the rear end toward the front end, unlike the belt conveyor (3). Side guide members (7, 7) are provided on the side surfaces of the belt, and pushers (8, 8) for moving the side guide members (7, 7) up and down are installed below the belt conveyor (3). ing.
The belt conveyor (3) is held on the holding frame (4) and supported and fixed to the rotating base (9), and the horizontal base shaft (91) on the payoff reel (2) side is used as a fulcrum. ), And a point that is configured to rotate (swing motion) between the steel strip tip guide position (P1) and the standby position (P2) below it, and the steel strip tip (SH) is coiled The point that the spouting device (10) that scoops from (SC) is configured to move forward and backward between the steel strip tip guide position (P1) and the standby position (P3) below it is that in FIG. It is the same.

  2 and 3 show the configuration of the belt conveyor (3) (FIG. 2: front view, FIG. 3: plan view). The inclined surface (5f) is formed on the apron (5) at the front of the belt conveyor (3) because the steel strip tip (SH) spun from the coil (SC) directly collides with the belt (31). This is because the steel strip tip (SH) is smoothly transferred from the apron (5) to the belt (31) while avoiding this. In order to obtain the collision preventing effect, the rear end of the inclined surface (5f) is given a projecting height (5h) (for example, 10 to 30 mm) higher than the surface of the belt (31). The inclined surface (5f) is formed of a tough and wear resistant material (for example, MC nylon plate) so as to withstand repeated collision of the steel strip tip (SH). In addition, in this example, as shown in FIG. 3, although two aprons (5) and (5) are attached to the left and right sides of the steel strip pass line, the present invention is not limited to this and covers the entire width direction of the steel strip pass line. It may be an integral type of long size.

  The side guide members (7, 7) on both the left and right sides of the belt conveyor (3) are made of a plate-like material as shown in FIGS. 3 and 4, and the outer edges of the respective side guide members (7, 7) are axes (71 , 71) is engaged with each of the side members (41), (41) of the conveyor holding frame (4). Each side guide member (7, 7) can be moved up and down (rotated) about the shaft (71, 71) as a fulcrum. In addition, through holes (42) and (42) are formed in the side members (41) and (41), respectively. The through holes (42) and (42) are holes through which the pushers (8) and (8) (see FIGS. 1 and 4) are passed.

  The up and down (rotating) operation of the side guide members (7, 7) will be described with reference to FIG. 4. The chain conveyor belt conveyor (3) is located at the steel strip tip guide position (P1). And the solid line belt conveyor (3) shows the state when it is retreated to the standby position (P2). As shown in the figure, in the state where the belt conveyor (3) is located at the steel strip front end guide position (P1) (shown by chain line), the side guide members (7, 7) are the side members (42) of the holding frame (4). ) (42) is in a horizontal position and is lower than the belt (31) of the belt conveyor (3). On the other hand, the side guide members (7, 7) when the belt conveyor (3) has retreated to the standby position (P2) (shown by solid lines in the figure) are pushed up by the pushers (8, 8). The shaft (71, 71) is pivoted (raised) around the fulcrum, and the posture is higher than the belt (31). If the belt conveyor (3) is rotated (raised) from the standby position (P2) to the steel strip tip guide position (P1) again, the side guide members (7, 7) are moved from the pushers (8, 8). As it leaves, it turns (lowers) by its own weight and returns to a lower horizontal position (shown by chain line) than the belt (31). As described above, the vertical displacement of the side guide members (7, 7) does not require an actuator device, and automatically moves upward and downward from the belt surface as the belt conveyor (3) rotates. To do.

  In the above apparatus, when starting unwinding of the steel strip, the belt conveyor (3) is rotated to the steel strip tip guide position (P1) according to the winding diameter of the coil (SC), and the lead device ( 10) is advanced to the front side of the belt conveyor (3) and the rotation of the payoff reel (1) is started. The steel strip tip (SH) scooped by the knife edge (11) of the lead-out device (10) as the payoff reel (1) rotates is along the inclined surface of the apron (5) of the belt conveyor (3). Advance. Since the rear end of the inclined surface (5f) of the apron (5) protrudes higher than the belt (31), as shown in FIG. 5, the steel strip tip (SH) should directly collide with the belt (31). Without moving on the belt (31). Further, since the side guide members (7, 7) at this time are lowered to a position lower than the belt surface (FIG. 4, indicated by a chain line), they do not hinder the forward movement of the steel strip tip (SH), Moreover, the action of the magnetic attraction force on the steel strip of the magnet (32) is not weakened. As a result, the steel strip (S) is in close contact with the surface of the belt (31) and is transported straight toward the pinch roll (2) while being stably adsorbed and held.

  If the apron (5) has a flat shape without an inclined surface like the apron in FIGS. 7 and 8, etc., the apron (5) is narrower than the left and right separation widths of the side guide members (7) and (7). When transporting the steel strip (S) of the plate width, the steel strip tip (SH) enters between the side guide members (7) and (7), the side edges of the steel strip are caught and the plate is obstructed. Sometimes. The inclined surface (5f) formed on the apron (5) according to the present invention also has an effect of avoiding the trouble of the steel strip entering between the side guide members and the passing plate thereby.

  After the steel strip tip (SH) has been extracted, the extraction device (10) moves back to the lower standby position (P3). When the steel strip tip (SH) is sandwiched between the pinch rolls (2), the belt conveyor (3) finishes its role and moves (rotates downward) to the standby position (P2). The belt conveyor (3) moved to the standby position (P2) has a posture in which the left and right side guide members (7, 7) are pushed up by the pushers (8, 8) and protrude higher than the belt (31). (Figure 4, solid line display). Therefore, the steel strip tail end (ST) unwound from the steel strip coil (SC) rides on the side guide members (7, 7) as shown in FIG. 6 (and shown by the solid line in FIG. 4). Since it is guided to the pinch roll (2) in a state, the belt (31) is not hit.

In the illustrated embodiment, the belt conveyor (3) is fixed to the rotating base (9) and is connected to the rotating base (9) by a rotary driving device (hydraulic cylinder) (92). ) And the belt conveyor (3) are rotated, but the rotation drive structure is not limited to this. For example, the belt conveyor holding frame (4) is supported so as to be rotatable about a horizontal axis, and a rotation driving means (such as a hydraulic cylinder) is connected to the holding frame (4) to perform a rotation operation. You can also
Moreover, the steel strip tip device (10) is not necessarily required, for example, by forming a knife edge of an appropriate shape at the tip of the apron (5) at the front of the belt conveyor (3) to provide a mouth function. The installation of the mouthing device (10) can be omitted.
As for the shape of the side guide members (7, 7) and its lifting mechanism, the rotation of the belt conveyor (3) (swing operation between the steel strip tip guide position P1 and the standby position P2) and the pusher (8, 8 ), It is possible to adopt various forms in which the side guide members (7, 7) can be moved up and down (displaced to a position higher and lower than the belt 31) without using an actuator device.

According to the present invention, it is possible to reliably prevent the impact of the steel strip tip and tail ends on the belt conveyor and the resulting belt damage (breakage, tearing, etc.), and stably maintain the steel strip guide function of the belt conveyor. Can do. Thereby, the service life of the belt conveyor and the significant improvement effect of the maintenance can be obtained, and the stable supply of the steel strip to the steel strip continuous processing line and the stable continuous operation in the continuous processing line are ensured.
Further, according to the present invention, the belt damage prevention function can be achieved without using actuator devices, the structure is simple, it can be easily applied to existing devices, and has great practical value. is there.

It is front explanatory drawing which shows the Example of this invention. It is a front view which shows the example of the belt conveyor in this invention. It is a top view of the belt conveyor of FIG. It is explanatory drawing which shows the raising / lowering operation | movement of the side guide member of a belt conveyor. It is explanatory drawing which shows typically the transfer state of the steel strip front-end | tip part in this invention. It is explanatory drawing which shows typically the transfer state of the steel strip tail part in this invention. It is a front view which shows the conventional steel strip unwinding guide apparatus. It is explanatory drawing which shows typically the transfer state of the steel strip front-end | tip part in the apparatus of FIG. It is explanatory drawing which shows typically the transfer state of the steel strip tail end part in the apparatus of FIG.

Explanation of symbols

1: Payoff reel 2: Pinch roll 3: Belt conveyor 31: Belt 32: Magnet 4: Belt conveyor holding frame 41: Side plate 42 of frame body: Through hole 5 for pusher 5: Apron
5f: Apron inclined surface 6: Guide table

7: Side guide member 71: Hinge shaft of side guide member 8: Pusher of side guide 9: Belt conveyor rotation base 91: Horizontal support shaft 92 of rotation base: Rotary drive device (hydraulic cylinder)
10: Steel strip outlet device 11: Knife edge 12: Advancement / retraction drive device of hydraulic device (hydraulic cylinder)
13: Coil holding roll
CS: Steel strip coil S: Steel strip P1: Steel strip tip guide position P2: Standby position of belt conveyor P3: Standby position of lead-out device

Claims (2)

A magnet that is disposed between a steel strip coil mounted on a payoff reel and a pinch roll on the entry side of a steel strip continuous processing line, and moves the steel strip that is unrolled from the steel strip coil to the pinch roll. Steel strip unwinding guide device equipped with a belt conveyor,
The magnetic belt conveyor (3) uses the pinch roll side as a fulcrum, and the steel strip tip guide position (P1) at the start of unwinding of the steel strip and the standby position after the steel strip tip is pinched by the pinch roll (P2 ) To be able to rotate vertically between
An apron (5) having a rear end protruding above the belt surface and having an inclined surface inclined downward toward the front end side is provided at the front portion of the belt conveyor (3), while the belt conveyor (3) Side guide members (7, 7) are oppositely arranged on both the left and right sides of the belt, and the side guide members (7, 7) are rotated by the belt conveyor (3) to the lower standby position (P2). Elevated displacement structure that rises to a position higher than the belt surface in the state, and descends to a position lower than the belt surface when rotated to the steel strip tip guide position (P1),
The steel strip tip squeezed out from the steel strip coil is directly on the belt of the belt conveyor (3) along the inclined surface of the apron (5) of the belt conveyor (3) located at the steel strip tip guide position (P1). It moves to the pinch roll while adsorbed and held on the surface of the belt without colliding, and the side guide members (7, 7) of the belt conveyor (3) where the side edges of the steel strip are located at the standby position (P2). The steel strip unwinding guide device on the entry side of the steel strip continuous processing line is characterized in that it moves toward the pinch roll.   The side guide members (7, 7) are formed of a plate-like body having a length from the front end side to the rear end side of the belt conveyor (3), and are supported in a direction parallel to the belt conveyor attached to each side edge. The pushers (8, 8) for rotating the side guide members (7, 7) are arranged on both the left and right sides of the belt conveyor (3) so as to be rotatable about the shafts (71, 71). It is installed under the side guide member. When the belt conveyor (3) is turned to the standby position (P2), it is pushed up by the pushers (8, 8) and raised to a position higher than the belt surface. 2. The structure according to claim 1, wherein when the belt is rotated to the belt tip guide position (P 1), the belt is separated from the pusher (8, 8) and lowered to a position lower than the belt surface of the belt conveyor (3). Steel strip unwinding guide device.

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