JP7019484B2 - Passing board guide device - Google Patents

Description

The present invention relates to a plate guide device that guides a steel strip so that the tip of the steel strip unwound from the payoff reel moves toward the downstream side .

In the steel strip processing line, the steel strip unwound from the payoff reel is sandwiched between pinch rollers arranged above and below, and the steel strip is provided with a cutting device provided downstream of the pinch roller in the steel strip transport direction. The off-gauge part is cut. In this case, the upper and lower pinch rolls are once separated from each other before sandwiching the steel strip. Further, the tip of the steel strip unwound from the payoff roll passes between the upper and lower pinch rolls and moves toward the above-mentioned cutting device, so that the tip of the steel strip is on the downstream side of the lower pinch roll in the steel strip transport direction. Passing board guides are placed in close proximity. This through plate guide makes it possible to guide the steel strip toward the cutting device.

However, there are cases where the tip of the steel strip unwound from the payoff reel cannot move smoothly toward the cutting device. For example, when the tip of the steel strip unwound from the payoff reel collides with the end of the plate guide and damages the plate guide, or enters the gap between the lower pinch roll and the plate guide. For example, it hinders the smooth movement of the tip of the steel strip.

Patent Document 1 discloses an example of a through plate guide for dealing with such a problem. The plate guide described in Patent Document 1 has a tip that is reversely tapered from the upper surface to the lower surface and is inclined upward from the tip to the rear end. As a result, the gap between the upper surface of the plate guide and the lower pinch roll is reduced, and the tip of the steel strip is less likely to enter the gap between the pinch roll and the plate guide.

Japanese Unexamined Patent Publication No. 2014-184444

However, in the plate guide in Patent Document 1, even if the gap between the pinch roll and the plate guide is reduced, it is not possible to completely prevent the tip of the steel strip from entering the above gap. Further, the fact that the tip of the steel strip hits the end of the plate guide and damages the plate guide cannot be solved yet.

Therefore, an object of the present invention is to provide a plate guide device capable of allowing the tip of a steel strip unwound from a payoff reel to move smoothly toward the downstream side .

(1) The plate guide device according to the present invention has a pair of upper and lower pinch rolls and a pair of upper and lower pinch rolls that sandwich the steel strip unwound from the payoff reel around which the steel strip is wound in the steel strip processing line. Of these, the tip of the steel strip passes between the pair of upper and lower pinch rolls while being arranged on the downstream side of the lower pinch roll in the steel strip transport direction and the pair of upper and lower pinch rolls are separated in the vertical direction. A through plate guide that guides the steel strip so as to move to a predetermined position is provided, and the lower pinch roll has convex portions and concave portions that are alternately arranged in the axial direction of the lower pinch roll. The plate guide has an end that contacts the lower pinch roll, the end having recesses and protrusions that alternate along the axial direction of the lower pinch roll. When the plate guide is close to the lower pinch roll, the lower pinch roll is convex while preventing the plate guide from coming into contact with the outer peripheral surface of the convex portion of the lower pinch roll. The portion is configured to fit into the concave portion of the through plate guide, and the convex portion of the through plate guide is fitted into the concave portion of the lower pinch roll.

According to the configuration of (1) above, the convex portion of the through plate guide fits into the concave portion of the lower pinch roll, so that the tip end portion of the through plate guide is located in the concave portion of the lower pinch roll. As a result, it is possible to prevent the tip of the steel strip from hitting the end of the plate guide, and it is possible to prevent the plate guide from being damaged. Further, the convex portion of the through plate guide fits into the concave portion of the lower pinch roll while preventing the outer peripheral surface of the convex portion of the lower pinch roll from coming into contact with the through plate guide, so that the outer peripheral surface of the convex portion of the pinch roll is fitted. While preventing surface wear, it is possible to prevent the tip of the steel strip from entering the gap between the lower pinch roll and the plate guide. Therefore, it is possible to prevent various problems from occurring when the tip of the steel strip unwound from the payoff reel approaches the lower pinch roll, and the tip of the steel strip can move smoothly toward the downstream side . It becomes possible to do so. The "up and down" in the above (1) includes not only the up and down along the vertical direction but also the up and down along the direction inclined with respect to the vertical direction.

According to the present invention, it is possible to provide a plate guide device capable of allowing the tip of a steel strip unwound from a payoff reel to move smoothly toward the downstream side .

It is a side view which shows the steel strip processing line provided with the plate guide device which concerns on embodiment of this invention. (A) is a side view which shows the through-plate guide device which concerns on embodiment of this invention, (b) is the convex | It is sectional drawing which shows the state which the part is fitted in the concave part of the lower pinch roll. It is an axial sectional view which shows the lower pinch roll which constitutes the through plate guide device which concerns on embodiment of this invention. It is an axial sectional view which shows the main part in FIG. 3 enlarged. It is a top view which shows the through plate guide which constitutes the through plate guide device which concerns on embodiment of this invention. FIG. 5 is a cross-sectional view taken along the line AA in FIG. It is a figure which shows the correspondence relationship between the convex part and the concave part of the through plate guide which concerns on embodiment of this invention, and the convex part and the concave part of the lower pinch roll.

Hereinafter, the plate guide device according to the embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing a steel strip processing line provided with a plate guide device according to an embodiment of the present invention. FIG. 2A is a side view showing a plate guide device according to an embodiment of the present invention, and FIG. 2B is a state in which the lower pinch roll and the plate guide are moved downward. , It is sectional drawing which shows the state which the convex part of the through plate guide is fitted in the groove part of the lower pinch roll.

The steel strip processing line 1 in the present embodiment includes two payoff reels (first payoff reel (not shown) and second payoff reel 11), and first steel strip 12 and second payoff unwound from the first payoff reel. Of the second steel strip 13 unwound from the reel 11, a welder (not shown) for welding the rear end of the preceding steel strip and the tip of the trailing steel strip, and the first steel strip 12 are the first payoff reels. It is provided with an upper pass line 14 leading from 10 to the welder and a lower pass line 15 arranged below the upper pass line 14 and leading the second steel strip 13 to the welder.

The welder continuously processes the first steel strip 12 unwound from the first payoff reel and the second steel strip 13 unwound from the second payoff reel 11 in the steel strip processing line 1. Of these two steel strips, the trailing end of the leading steel strip (hereinafter referred to as "leading steel strip") and the trailing steel strip (hereinafter referred to as "following steel strip") It is used to weld the tip.

Further, the steel strip processing line 1 is provided on the upstream side of the double cut shear (not shown) for cutting the first steel strip 12 and the second steel strip 13 and the double cut shear in the transport direction of the first steel strip 12. A double cut of the through plate table 23, the through plate guide device 2 provided on the upstream side of the through plate table 23 (see FIG. 2) in the transport direction of the first steel strip 12, and the second steel strip 13 in the transport direction. A through plate table (not shown) provided on the upstream side of the shear, a through plate guide device (not shown) provided on the upstream side of the above-mentioned through plate table in the transport direction of the second steel strip 13, and the first. It includes a first leveler feed 20 for adjusting the shape of the tip portion of the steel strip 12, and a second leveler feed 21 for adjusting the shape of the tip portion of the second steel strip 13. The double cut shear is supported by the support column 22.

The through plate guide device 2 will be described with reference to FIG.

The plate guide device 2 has a pair of upper and lower pinch rolls (upper pinch roll 16 and lower pinch roll 17) that sandwich the first steel strip 12 and a through plate guide device 2 arranged on the downstream side of the lower pinch roll 17 in the steel strip transport direction. Includes plate guide 24.

The upper pinch roll 16 is a substantially cylindrical pinch roll, and the first steel strip 12 can be sandwiched between the upper pinch roll 16 and the lower pinch roll 17.

The lower pinch roll 17 is movable in the vertical direction. In the example shown in FIG. 2, the state of moving to the upper side is shown by a solid line and a broken line, and the state of moving to the lower side is shown by a two-dot chain line. When the lower pinch roll 17 is moved upward, the first steel strip 12 can be sandwiched between the lower pinch roll 17 and the upper pinch roll 16.

Further, the lower pinch roll 17 is located below the upper pinch roll 16 in a state of being moved to the lower side, and can pass the first steel strip 1 with the upper pinch roll 16.

The lower pinch roll 17 is moved up and down by an elevating mechanism (not shown) capable of moving the lower pinch roll 17 up and down. This elevating mechanism can be operated by an instruction from a control unit (not shown).

The control unit performs predetermined processing based on the ROM and RAM for storing the predetermined program and data that enable the lower pinch roll 17 to be moved up and down, and the program and data stored in the ROM and RAM. It has a CPU to execute.

The structure of the lower pinch roll 17 will be described with reference to FIGS. 3 and 4. FIG. 3 is an axial sectional view showing the lower pinch roll 17. FIG. 4 is an enlarged axial sectional view showing a main part in FIG.

The lower pinch roll (corresponding to the "pinch roll" of the present invention) 17 has a metal shaft portion 27 and a rubber cylindrical surface layer portion 28 provided on the outer periphery of the shaft portion 27. There is.

The surface layer portion 28 has a large diameter portion 25 (corresponding to a “convex portion” of the present invention) and a small diameter portion 26 that are alternately arranged in the axial direction. The distance r1 of the large diameter portion 25, that is, the distance from the radial center c of the lower pinch roll 17 to the outer peripheral surface 36 of the large diameter portion 25 is the radius r2 of the small diameter portion 26, that is, the diameter of the lower pinch roll 17. It is larger than the distance from the direction center c to the outer peripheral surface 37 of the small diameter portion 26 (see FIG. 4). Then, due to the difference in diameter between the large diameter portion 25 and the small diameter portion 26, the groove portion 29 (corresponding to the “recess” of the present invention) is formed over the entire circumferential direction of the surface layer portion 28. The outer peripheral surface 36 of the large diameter portion 25 is a surface that comes into contact with the first steel strip 12.

In the example shown in FIG. 4, the length W1a of the large diameter portion 25 in the axial direction is smaller than the band width of the first steel strip 12, and is set to, for example, about 100 mm. Further, the length W1b of the small diameter portion 26 in the axial direction is smaller than the band width of the first steel strip 12, and is set to, for example, about 94 mm. Further, the height H1 of the step between the large diameter portion 25 and the small diameter portion 26, that is, the difference (r1-r2) between the radius r1 and the radius r2 is set to, for example, about 15 mm. The numerical values described here are examples and can be changed as appropriate. The length W1b of the small diameter portion 26 coincides with the groove width of the groove portion 29.

The structure of the through plate guide 24 will be described with reference to FIGS. 5 and 6. FIG. 5 is a plan view showing an example of the through plate guide 24. FIG. 6 is a cross-sectional view taken along the line AA in FIG.

The plate guide 24 is a flat strip-shaped member extending along the axial direction of the lower pinch roll 17 (see FIG. 5). The plate guide 24 has a pinch roll side end portion 30 on one side (lower pinch roll 17 side) in the band width direction (left and right direction of the paper surface in FIG. 5). The pinch roll side end portion 30 is formed with concave portions 31 and convex portions 32 that are alternately arranged along the longitudinal direction of the plate guide 24 (the vertical direction of the paper surface in FIG. 5). Further, in the vicinity of both ends of the plate guide 24 in the longitudinal direction, elongated holes 40 for attaching the plate guide 24 to a moving mechanism (not shown) described later by fixing metal fittings such as bolts and nuts are formed.

In the example shown in FIG. 6, the thickness T of the through plate guide 24 is set to, for example, about 6 mm.

The width W2a of the recess 31 is set to a value larger than the length W1a of the large diameter portion 25 of the lower pinch roll 17, and is set to, for example, about 106 mm. Further, the width W2b of the convex portion 32 is set to a value smaller than the length W1b of the small diameter portion 26 of the lower pinch roll 17, and is set to, for example, about 94 mm. The width W2a of the concave portion 31 and the width W2b of the convex portion 32 are both smaller than the band width of the first steel strip 12.

The surface 33 facing the lower pinch roll 17 in the recess 31 is set so that the angle α1 formed with the upper surface 35 when the plate guide 24 comes into contact with the lower pinch roll 17 is an acute angle. In the example shown in FIG. 6, the angle α1 is set to, for example, about 35 degrees.

The surface 34 of the convex portion 32 facing the lower pinch roll 17 is set so that the angle α2 formed by the upper surface 35 when the plate guide 24 comes into contact with the lower pinch roll 17 is an acute angle. In the example shown in FIG. 6, the angle α2 is set to, for example, about 35 degrees. Of the surface 34 of the convex portion 32 facing the lower pinch roll 17, the portion adjacent to the surface 35 may be chamfered (see FIG. 6).

The height H2 of the step between the concave portion 31 and the convex portion 32 is set to a value larger than the height H1 of the step between the large diameter portion 25 and the small diameter portion 26 of the lower pinch roll 17, and is shown in FIG. In this example, it is set to, for example, about 23 mm. Further, the distance H3 between the virtual plane including the surface 33 and the virtual plane including the surface 34 is set to a value larger than the height H1.

The plate guide 24 is passed through the upper pinch roll 16 and the lower pinch roll 17 with the tip of the first steel strip 12 passing between the upper pinch roll 16 and the lower pinch roll 17 in a state where the upper pinch roll 16 and the lower pinch roll 17 are separated from each other in the vertical direction. It is possible to guide the first steel strip 12 so as to move onto the plate table 23.

The through plate guide 24 is supported by a movement mechanism (not shown) so as to move up and down with the vertical movement of the lower pinch roll 17. That is, the plate guide 24 moves upward as the lower pinch roll 17 moves upward, and moves downward as the lower pinch roll 17 moves downward (FIG. 2). reference). In FIG. 2, the lower pinch roll 17 in the state of being moved to the upper side is shown by a solid line, and the lower pinch roll 17 in the state of being moved to the lower side is shown by a two-dot chain line. The movement mechanism can be operated by an instruction from the control unit (not shown).

Further, the through plate guide 24 is supported by the above-mentioned moving mechanism so as to be in a substantially horizontal state when moved upward, while the downstream side of the first steel strip 12 in the transport direction when moved downward (FIG. FIG. It is supported by the above-mentioned moving mechanism so as to incline uphill toward (the right side of the paper surface of No. 2). In the example shown in FIG. 2, the plate guide 24 is tilted so as to form an angle of, for example, 35 degrees with respect to the horizontal direction in a state of being moved downward.

Further, the plate guide 24 is supported by the above-mentioned moving mechanism so as to come into contact with the lower pinch roll 17 in a state of being moved downward and tilted.

Specifically, in a state where the plate guide 24 is moved downward and tilted, the large diameter portion 25 of the lower pinch roll 17 fits into the concave portion 31 of the plate guide 24, and the convex portion 32 of the plate guide 24 is fitted. Is fitted into the groove 29 of the lower pinch roll 17 (see FIG. 7). In FIG. 7, for convenience, the convex portion 32 of the plate guide 24 is not in contact with the lower pinch roll 17. However, in the state where the lower pinch roll 17 and the through plate guide 24 are moved downward as described above (see FIG. 2), the lower pinch roll 17 side of the convex portion 32 of the through plate guide 24 is actually used. The facing surfaces 34 come into contact with the outer peripheral surface 37 of the small diameter portion 26 of the lower pinch roll 17 (see FIG. 2B). At this time, the outer peripheral surface 36 of the large diameter portion 25 of the lower pinch roll 17 does not come into contact with the through plate guide 24. Further, it is preferable that the side surface 38 of the convex portion 32 of the plate guide 24 does not come into contact with the lower pinch roll 17.

On the other hand, even in a state where the through plate guide 24 moves upward and becomes substantially horizontal, the large diameter portion 25 of the lower pinch roll 17 fits into the concave portion 31 of the through plate guide 24, and the convex portion 32 of the through plate guide 24 Fits into the groove 29 of the lower pinch roll 17 (see FIG. 2A). However, in this state, the surface 34 of the plate guide 24 facing the lower pinch roll 17 side of the convex portion 32 is separated from the outer peripheral surface 37 of the small diameter portion 26 of the lower pinch roll 17 (FIG. 2). (A)). At this time, the outer peripheral surface 36 of the large diameter portion 25 of the lower pinch roll 17 does not come into contact with the through plate guide 24. Further, it is preferable that the side surface 38 of the convex portion 32 of the plate guide 24 does not come into contact with the lower pinch roll 17.

The elongated hole 40 is formed so as to extend in the band width direction of the plate guide 24. By inserting a fixing bracket such as a bolt through the elongated hole 40, it can be attached to the above-mentioned moving mechanism. Further, the position of the plate guide 24 with respect to the lower pinch roll 17 can be adjusted by releasing the fixed state by the bolt or the like and moving the plate guide 24 in the band width direction.

Next, a usage example of the plate guide device 2 according to the present embodiment will be described with reference to FIG.

Here, in the steel strip processing line 1, the processing of the first steel strip 12 unwound from the first payoff reel and the processing of the second steel strip 13 unwound from the second payoff reel 11 are continuously performed. In order to perform this, the operation in the case where the first steel strip 12 is used as a trailing steel strip and the tip of the first steel strip 12 is passed between the upper pinch roll 16 and the lower pinch roll 17 will be described.

First, the lower pinch roll 17 is lowered (see the lower pinch roll 17 of the alternate long and short dash line shown in FIG. 2A). In the state where the lower pinch roll 17 is lowered, the large diameter portion 25 of the lower pinch roll 17 fits into the concave portion 31 of the through plate guide 24, and the convex portion 32 of the through plate guide 24 is the groove portion of the lower pinch roll 17. Fits in 29. Further, the surface 34 of the plate guide 24 facing the lower pinch roll 17 of the convex portion 32 comes into contact with the outer peripheral surface 37 of the small diameter portion 26 of the lower pinch roll 17. Further, the outer peripheral surface 36 of the large diameter portion 25 of the lower pinch roll 17 does not come into contact with the plate guide 24.

In this state, the first steel strip 12 is conveyed so that the tip 12a of the first steel strip 12 approaches the plate guide 24.

By the way, the tip 12a of the first steel strip 12 passing through the upper pass line approaches the plate guide 24 from above. Therefore, when the pinch roll side end portion 30 of the through plate guide 24 is above the outer peripheral surface of the lower pinch roll 17, the tip 12a of the first steel strip 12 is the pinch roll side end portion 30 of the through plate guide 24. There is a possibility that the plate guide 24 may collide with the steel plate guide 24 and enter the gap between the lower pinch roll 17 and the plate guide 24. In this respect, in the present embodiment, as described above, the convex portion 32 of the through plate guide 24 fits into the groove portion 29 of the lower pinch roll 17, so that the tip end portion of the through plate guide 24 is the groove portion of the lower pinch roll 17. Located within 29. As a result, it is possible to prevent the tip 12a of the first steel strip 12 from hitting the pinch roll side end portion 30 of the plate guide 24, and it is possible to prevent the plate guide 24 from being damaged. Further, when the convex portion 32 of the plate guide 24 fits into the groove portion 29 of the lower pinch roll 17, the tip 12a of the first steel strip 12 comes into contact with the outer peripheral surface 36 of the lower pinch roll 17 and the outer peripheral surface thereof. After moving along 36, it contacts the upper surface other than the end portion of the plate guide 24 and moves along this surface. As a result, it is possible to prevent the tip 12a of the first steel strip 12 from entering the gap between the lower pinch roll 17 and the plate guide 24. Therefore, the first steel strip 12 is double-cut to prevent various problems from occurring when the tip 12 of the first steel strip 12 unwound from the first payoff reel approaches the lower pinch roll 17. It will be possible to move smoothly toward the shear.

Since the tip 12a of the first steel strip 12 does not enter the gap between the lower pinch roll 17 and the through plate guide 24, the first steel strip 12 is normally guided toward the through plate table 23 by the through plate guide 24. , Transported towards the double cut shear.

The off-gauge portion at the tip of the first steel strip 12 conveyed to the double cut shear is cut by the double cut shear. Then, the tip of the first steel strip 12 from which the off-gauge portion is cut is welded to the rear end of the second steel strip 13 which is the leading steel strip by a welding device (not shown).

After that, the lower pinch roll 17 moves upward by the elevating mechanism, and along with this movement, the plate guide 24 moves upward by the moving mechanism. With the lower pinch roll 17 and the plate guide 24 moved upward, the first steel strip 12 is sandwiched between the outer peripheral surface 36 of the large diameter portion 25 of the lower pinch roll 17 and the upper pinch roll 16. In this state, the lower pinch roll 17 and the plate guide 24 do not come into contact with each other.

With the lower pinch roll 17 and the plate guide 24 moved upward, the first steel strip 12 is transported from the welding device toward a predetermined processing facility on the downstream side in the transport direction.

According to the present embodiment, as described above, the large diameter portion 25 of the lower pinch roll 17 fits into the concave portion 31 of the through plate guide 24, and the convex portion 32 of the through plate guide 14 is the groove portion 29 of the lower pinch roll 17. Fits in. This prevents the occurrence of various problems when the tip of the first steel strip 12 unwound from the first payoff reel approaches the lower pinch roll 17, and the first steel strip 12 is a pair of pinch rolls. It is possible to pass between 16 and 17 and move smoothly toward the double cut shear.

Further, according to the present embodiment, since the outer peripheral surface 36 of the large diameter portion 25 in the lower pinch roll 17 does not come into contact with the through plate guide 24, the outer peripheral surface 36 of the large diameter portion 25 due to friction with the through plate guide 24 ( It is possible to prevent the surface that presses the first steel strip 12) from being worn.

Further, by preventing the plate guide 24 from being damaged, it is possible to eliminate the replacement work of the plate guide 24 and improve the processing efficiency of the steel strip, and also eliminate the danger associated with the replacement work to safely eliminate the steel strip. Can be processed.

In the above embodiment, the case where the present invention is applied to the plate guide device 2 for guiding the first steel strip 12 through which the upper pass line 14 is passed has been described, but the second plate through which the lower pass line 15 is passed has been described. If there is a concern that the plate guide may be damaged even in the plate guide device (not shown) that guides the steel strip 13, the present invention may be applied to the lower pinch roll and the plate guide constituting the plate guide device. May be applied.

According to the present invention, it is possible to prevent the occurrence of various problems when the tip of the steel strip unwound from the payoff reel approaches the pinch roll, and to contribute to the improvement of the processing efficiency of the steel strip.

1 Steel strip processing line 2 Through plate guide device 12 First steel strip 17 Lower pinch roll 24 Through plate guide 25 Large diameter part 26 Small diameter part 29 Groove part 31 Concave part 32 Convex part

Claims (1)

In the steel strip processing line, a pair of upper and lower pinch rolls that sandwich the steel strip unwound from the payoff reel on which the steel strip is wound, and
Of the pair of upper and lower pinch rolls, the tip of the upper and lower pinch rolls is arranged on the downstream side in the steel strip transport direction of the lower pinch roll, and the tip of the steel strip is pinched in the upper and lower pairs with the pair of upper and lower pinch rolls separated in the vertical direction. A plate guide that guides the steel strip so that it passes between the rolls and moves to a predetermined position,
Equipped with
The lower pinch roll has protrusions and recesses that alternate in the axial direction of the lower pinch roll.
The plate guide has an end that contacts the lower pinch roll, the end having recesses and protrusions that alternate along the axial direction of the lower pinch roll.
When the plate guide is close to the lower pinch roll, the lower pinch roll is convex while preventing the plate guide from coming into contact with the outer peripheral surface of the convex portion of the lower pinch roll. A plate guide device, characterized in that a portion is fitted in a recess of the plate guide, and a convex portion of the plate guide is fitted in a recess of the lower pinch roll.

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