JP4369697B2 - Steel plate shearing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steel plate shearing device for shearing a steel strip conveyed on a conveyor, and more particularly to a steel plate shearing device for shearing a steel strip with a cutting line having an uneven shape in plan view.
[0002]
[Prior art]
[Patent Document 1]
Japanese Patent Laid-Open No. 55-37264
When a steel strip is drawn from a steel plate coil and sheared into a steel plate having a predetermined shape, a steel plate shearing device called a drum shear or a flying shear is used. A drum shear that shears in synchronization with the feeding speed of the steel strip, whereas a flying shear shears while moving in synchronization with the steel strip that is running, so the feeding speed of the steel strip and the moving speed of the blade of the shearing device during shearing However, in the case of a thin plate, there is a possibility that a material uncutting phenomenon may occur, and as a solution to this problem, for example, as disclosed in Japanese Patent Application Laid-Open No. 55-37264 A shearing machine has been proposed. Japanese Patent Application Laid-Open No. 55-37264 discloses a technique in which a steel strip is sheared under tension between a supply roller and a reduction roller.
[0004]
Thin steel plates such as tinplate are widely used for food cans, miscellaneous cans, and the like, and the lid and bottom plate of a cylindrical can are manufactured by punching out circularly from this steel plate. However, the steel plate is generally square or rectangular, and when a circular lid or bottom plate is punched, a semicircular waste is generated on the end face as shown in FIG. On the other hand, if the end surface of the steel sheet is made to have an uneven shape that alternately enters and exits as shown in FIG. 11, this waste can be eliminated, and a steel sheet called a scroll sheet having an uneven surface is now required. ing.
[0005]
Such a scroll sheet can be manufactured by repeatedly shearing a running steel strip at a certain length along a cutting line as shown in FIG. Not only is it different depending on the order of the house, but also severe dimensional accuracy is required, and since the cutting line is uneven, there is a problem that it is not easy to surely shear without causing the end of the steel sheet to be bent or bent over the entire width. Further, since the cutting lines are complicated, separation after shearing is difficult, and it is inevitable that the configuration of the apparatus is complicated, and there is a problem that a large number of man-hours are required for maintenance.
[0006]
[Problems to be solved by the invention]
The present invention provides a steel plate shearing device that solves the above-mentioned problems, can prevent the folding and folding of the steel plate from occurring at the end of the steel plate, can be sheared by an uneven cutting line, has a simple configuration, and is easy to maintain. It was made to do.
[0007]
[Means for Solving the Problems]
The steel plate shearing device of the present invention made to solve the above-described problems includes a shearing mechanism unit that shears the steel strip following the steel strip conveyed on the conveyor, and the steel strip with respect to the shearing mechanism unit. A downstream conveyor that is located downstream in the transport direction and has a higher feed rate than the upstream conveyor, and a pressing roller that is provided at a position facing the downstream conveyor and presses the sheared steel plate in the direction of the downstream conveyor. A steel plate shearing device provided at a position separated from the position where the steel strip is sheared by more than the shear length of the steel strip, facing the upper blade across the steel strip, At a position adjacent to the lower blade, a plate that is urged upward by urging means from the lower side and can be moved up and down is provided, and the upper blade includes a push bar that can press the plate downward. The steel strip against the lower blade When the upper blade approaches to be sheared, the lowering amount of the plate pressed by the push rod is limited, the amount of lap between the lower blade and the upper blade is limited, and the plate is at the highest position. In some cases, the upper surface of the plate is located above the lower blade, and is particularly suitable for shearing a steel strip with a cutting line having an uneven shape in plan view. .
[0008]
Further, in the steel plate shearing apparatus according to the present invention, the shearing mechanism portion includes an upper blade and a lower blade that extend over the entire width of the steel strip and are positioned on the upstream side and the downstream side of the steel strip, respectively. It is preferable to provide a pressing pad that opposes the lower blade with the steel strip sandwiched therebetween, and clamps and restrains the steel strip in cooperation with the lower blade at a position adjacent to the upper blade .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the steel plate shearing apparatus of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a side view of a steel plate as viewed from the side in the direction of travel. The shearing mechanism unit 1 enables the steel strip W to follow the transporting direction, and the upstream side of the shearing mechanism unit 1 in the transporting direction of the steel strip W. (The right side in a figure) and the upstream conveyor 2 and the downstream conveyor 3 provided in the downstream, respectively. The steel strip W and the steel plate WS are conveyed from right to left as indicated by arrows in FIG. 1, and in the following description, the left side in the drawing is expressed as the downstream side in the conveyance direction.
[0010]
The shearing mechanism unit 1 is provided with a driving device (not shown) that moves the shearing mechanism unit 1 to the downstream side following the movement of the steel plate when the steel plate coil is sheared, and returns it to the upstream side after the end of the shearing. Since this driving device may be the same as that used in a conventionally known flying shear, detailed description thereof is omitted. The upstream conveyor 2 and the downstream conveyor 3 are each configured to support the belt by a plurality of rollers so as not to obstruct the movement of the shearing mechanism unit 1. It is faster than the feed rate. Further, on the upper side of the downstream conveyor 3, a pressing roller 4 that is pressed against the downstream conveyor 3 by a pressurizing device 5 such as an attached cylinder or the like and is rotated is provided. The pressing roller 4 is rotatable, and is provided at a position separated from the cutting position of the steel strip W by the shearing mechanism portion 1 by a length longer than the cutting length of the steel strip W.
[0011]
The shearing mechanism unit 1 is provided with a pair of upper and lower blades 6 and 7 in a pair of upper and lower portions, and the lower blade 7 is disposed on the downstream side. The upper blade 6 is fixed to an upper blade holder 8 attached to the shearing mechanism unit 1 so as to be movable up and down, and the lower blade 7 is fixed to a lower blade holder 9 fixed to the shearing mechanism unit 1 via a shim plate 10. is there. The reason why the lower blade 7 is fixed to the lower blade holder 9 via the shim plate 10 is to adjust the height of the lower blade 7, and this can be used as another height adjusting mechanism. The upper blade holder 8 is provided with a driving device such as a crank mechanism (not shown) for moving the upper blade holder 8 up and down. The upper blade holder 8 is lowered to engage the upper blade 6 and the lower blade 7 so that the steel plate is She tries to shear.
[0012]
2 shows a state in which the upper blade 6 and the lower blade 7 are opposed to each other, FIG. 3 shows a state in which the upper blade holder 8 is viewed from below, and FIG. 4 shows a state in which the lower blade holder 9 is viewed from above. ing. As shown in FIGS. 3 and 4, the upper blade 6 and the lower blade 7 have a concavo-convex cutting edge, and FIG. 2 shows a cross section taken along the line AA in FIGS. 3 and 4. The upper blade holder 8 is provided with a vertically movable pressing pad 11 that faces the lower blade 7 across the steel strip W. The pressing pad 11 is biased downward by a spring 12. In addition, the lower blade holder 9 is provided with a plate 13 that is movable up and down to face the upper blade 6 across the steel strip W, and the plate 13 is biased upward by a spring 14. The plate 13 is regulated so that the upper limit position is slightly above the lower blade 7, and is pressed against the plate 13 by a push rod 15 that is suspended from the upper blade holder 8 toward the plate 13. The push rod receiver 16 is provided integrally. When the push rod receiver 16 is pressed by the push rod 15, the plate 13 is lowered against the elastic force of the spring 14. Here, since the descending amount of the plate 13 is limited by the spring 14, the amount of lap between the upper blade 6 and the lower blade 7 is limited to be constant when the steel strip W described later is sheared.
[0013]
It is preferable that the pressing pad 11 has a shape along the uneven edge of the upper blade 6 with a certain gap, and the plate 13 preferably has a shape along the uneven edge of the lower blade 7 with a certain gap. The upper blade 6 and the lower blade 7 are configured to mesh with each other while maintaining an appropriate clearance. In FIG. 3, the relationship of the lower blade 7 with respect to the upper blade 6 is shown, and in FIG. Are indicated by alternate long and short dash lines. As shown in FIGS. 3 and 4, it is preferable that the pressing pad 11 and the plate 13 have shapes close to the lower blade 7 and the upper blade 6, respectively.
[0014]
When the steel strip W is supplied to the upstream conveyor 2 in the above structure, the steel strip W is transferred along the upper surface of the plate 13 as shown in FIG. When approaching the meshing position of the lower blade 7, the shearing mechanism unit 1 starts moving to the downstream side. When the cutting position of the steel strip W coincides with the meshing position of the upper blade 6 and the lower blade 7, the shear mechanism 1 follows the steel strip W and continues to move downstream, and the upper blade holder 8 starts to descend. To do. When the upper blade holder 8 is lowered, the push rod 15 pushes the push rod receiver 16, and the plate 13 is lowered as shown in FIG.
[0015]
When the upper blade holder 8 is further lowered, as shown in FIG. 7, the pressing pad 11 presses the steel strip W against the lower blade 7, and the lower blade 7 and the pressing pad 11 sandwich the steel strip W and restrain it. Subsequently, when the upper blade holder 8 is lowered, the upper blade 6 is lowered and meshed with the lower blade 7 as shown in FIG. 8 while compressing the spring 12, and the downstream end portion of the steel strip W is moved as shown in FIG. It will shear so that the steel plate WS may be shape | molded. When the shearing is completed in this manner, the upper blade holder 8 is raised, and the shearing mechanism unit 1 moves upstream and returns to the original position.
[0016]
When the downstream end of the steel plate WS is transferred by the downstream conveyor 3 and reaches the position of the pressing roller 4, the steel plate WS is pressed against the downstream conveyor 3 by the pressing roller 4, and the feed speed of the downstream conveyor 3 is reached. It will be transported by. Since the subsequent steel strip W is transported by the upstream conveyor 2 having a lower feed speed than the downstream conveyor 3, the steel plate WS and the subsequent steel strip W are pulled by the speed difference, and the sheared portion is surely secured. Will be pulled apart. Since the pressing roller 4 is provided at a position separated from the shearing position by the shearing mechanism portion 1 by a length equal to or longer than the cutting length of the steel plate WS, the downstream end of the steel strip W before shearing is not pulled.
[0017]
【The invention's effect】
As is clear from the above-described embodiment, the present invention increases the speed of the downstream conveyor than the shear mechanism section upstream conveyor and provides the pressing roller on the downstream side. There is an advantage that the following steel strip can be reliably separated. In addition, since the steel plate is pressed against the lower blade by a pressing pad during shearing, the end of the steel plate is less likely to be bent or bent back, and a support plate is provided slightly above the lower blade, so that the steel plate is not scratched by the lower blade. There is an advantage that does not occur. Therefore, the industrial value of the steel plate shearing device that can be sheared with a concavo-convex shaped cutting line with little return and hip breakage, simple in construction and easy to maintain is extremely high. .
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of a steel plate shearing apparatus of the present invention.
FIG. 2 is a longitudinal sectional view showing a configuration of a blade.
FIG. 3 is a bottom view showing a configuration of an upper blade.
FIG. 4 is a plan view showing a configuration of a lower blade.
FIG. 5 is a longitudinal sectional view showing a relationship between a blade and a steel plate.
FIG. 6 is a longitudinal sectional view showing a relationship between a blade and a steel plate.
FIG. 7 is a longitudinal sectional view showing the relationship between a blade and a steel plate.
FIG. 8 is a longitudinal sectional view showing the relationship between a blade and a steel plate.
FIG. 9 is a longitudinal sectional view showing the relationship between a blade and a steel plate.
FIG. 10 is a diagram showing an arrangement in the case of punching a circular can lid or bottom plate from a general steel plate.
FIG. 11 is a diagram showing an arrangement when a circular can lid or bottom plate is punched from a scroll sheet.
FIG. 12 is a diagram showing an uneven cutting line when a steel sheet is sheared to form a scroll sheet.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shearing mechanism part 2 Upstream conveyor 3 Downstream conveyor 4 Holding roller 6 Upper blade 7 Lower blade 8 Upper blade holder 9 Lower blade holder 10 Shim plate 11 Holding pad 12 Spring 13 Plate 14 Spring 15 Push rod 16 Push rod receptacle

Claims (3)

A shear mechanism that shears the steel strip following the steel strip that is transported on the conveyor, and a downstream that is located downstream of the shear mechanism in the transport direction of the steel strip and has a higher feed rate than the upstream conveyor A side conveyor and a pressing roller provided at a position facing the downstream conveyor and pressing the sheared steel plate in the downstream conveyor direction, and the pressing roller is moved from the position where the steel strip is sheared to the steel. A steel plate shearing device provided at a position separated from the shear length of the belt by a biasing means from below at a position facing the upper blade with the steel strip interposed therebetween and adjacent to the lower blade. A plate that is energized and can be moved up and down is provided, and the upper blade includes a push bar that can press the plate downward, and the upper blade is configured to shear the steel strip against the lower blade. When approaching, push it with the push rod. The lowering amount of the plate is limited, the amount of lap between the lower blade and the upper blade is limited, and when the plate is at the highest position, the upper surface of the plate is more upward than the lower blade A steel plate shearing device characterized by being provided.   The steel plate shearing apparatus according to claim 1, wherein the shearing mechanism section shears the steel strip with a cutting line having an uneven shape in plan view.   The shearing mechanism portion extends over the entire width of the steel strip, and includes an upper blade and a lower blade positioned on the upstream upper side and the downstream lower side of the steel strip, respectively. The press pad which clamps and restrains the said steel strip in cooperation with the said lower blade is provided in the position which opposes and adjoins the said upper blade, The Claim 1 or 2 characterized by the above-mentioned. Steel plate shearing device.

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