JP3753288B2 - Drum type running machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drum-type running cutter that cuts a plate material fed at high speed.
[0002]
[Prior art]
In a sheet rolling facility or a finishing facility, a running type cutting machine has been widely used in recent years in order to continue the facility and increase the sheet passing speed. Such running-type cutting machines include a swing method, a drum method, and others. As an example of a drum-type running cutter, a drum-type running shear (JP-A-5-123919) has already been proposed.
[0003]
As shown schematically in FIG. 5 (A), the drum-type running cutter of JP-A-5-123919 has a drum 3 equipped with a pair of upper and lower cutting blades 2 for cutting a plate material (strip 1). Synchronous rotation is performed by a driving device (not shown). Further, the bearing portion of the upper and lower drums is supported by the eccentric ring 4, and the drum interval is opened and closed by the eccentric amount of the eccentric ring 4 while rotating the eccentric ring 4 in synchronization with the upper and lower drums rotating at high speed. The strip 1 is cut as shown in FIG. Further, when the cutting material is not passed through the leading end and the tail end of the cutting material, or as shown in FIGS. 5 (A) and 5 (D), the strip roller 1 built in the lower drum is used to remove the strip 1. The plate is supported.
[0004]
In other words, with the conventional drum-type running-cutting machine
(1) A pair of upper and lower cutting drums 3 are provided and are arbitrarily started and stopped in the cutting process. (2) A pair of drums 3 is cut (cutting position) and miscut position (drum is opened and cut) The position where the blade does not contact) can be freely controlled by the synchronous rotation of the eccentric ring 4. (3) When passing through the plate until the next cutting after cutting, it stops in the state shown in FIG. The strip roller 1 and the swing rolls 6 provided before and after the table roller 5 are designed to smoothly pass the strip 1.
[0005]
[Problems to be solved by the invention]
However, as the cutting speed increases, (1) in the cutting step of FIG. 5C, the interval between the lower drum 2 and the front and rear swing rolls 6 is structurally such that the drum 3 rotates and the eccentric ring 4 5 (A) that swings due to a large gap (for example, a pitch between rolls of 250 mm or more), particularly when processing a thin plate material of about 0.6 to 3.2 mm thick, Since the conveyance is a non-uniform plane conveyance, the leading end of the strip jumps, or the leading end plunges between the lower drum 2 and the exit side rocking roll 6 due to its own weight, and the leading end jumps. There is a problem that air resistance is added to the state and a rising phenomenon (flying phenomenon) occurs, and if the amount of flying is excessive, the tip is bent and multiple folding occurs, causing the line to stop. .
(2) In addition, when the tension of the strip 1 fluctuates for some reason during the cutting process shown in FIGS. 5A to 5D, the strip 1 comes into contact with the drum roll 3 or the table roll 5 due to its own weight deflection. Then, the strip 1 is caught, causing the folding or cutting of the strip, breakage of the equipment, etc., and stopping the line.
[0006]
In order to solve the above problems (1) and (2), the cutting blade 2 is provided inside the outer diameter of the protector 9 of the cutting blade 2 attached to the drum 3 as schematically shown in FIG. Also proposed is a drum-type running-cutting machine in which the strip 1 can be supported by the lower drum 3 and the protector 9 and a swingable guide 7 is provided between the drum 3 and the support roll 8.
However, even in the case of such a drum-type running cutter, the gap between the guide 7 and the drum 3 becomes large (for example, 10 mm or more) because the upper and lower drums 3 are swung by the eccentric ring 4, and the tip of the strip 1 is caught in the meantime. Problems arise.
Also, when the swingable guide 7 is attached downward from the strip passage surface of the lower drum to prevent the insertion of the strip, the tip of the strip hits the inclined movable guide, causing a flying phenomenon, and the tip is folded. The line was sometimes stopped.
[0007]
The present invention has been developed to solve the above-described problems. That is, an object of the present invention is to fly the leading end of the strip by making the strip passing plate surface continuous in the leading end plate of the strip, or the normal passing plate and the passing plate immediately after cutting, and reducing the uneven step. Drum-type running-cut cutting that prevents multiple folding due to squeezing and penetration into the gap, and eliminates the space where the strip accumulates in a loop shape even if there is a change in tension, thereby preventing entrainment in the drum. Is to provide a machine.
[0008]
[Means for Solving the Problems]
According to the present invention, cylindrical upper and lower drums that are driven to rotate synchronously with each other around a horizontal axis, upper and lower cutting blades that are respectively attached at synchronous positions on the outer periphery of the drum, and upper and lower drums And a guide device having an upper surface disposed in the vicinity of the lower drum and extending along the plate passing direction of the strip. Is fixed at a fixed position, and the gap between the lower drum and the guide device is set so as to prevent the strip from being caught in the gap, and the upper and lower drums are rotated at high speed. cutting the strip Te, wherein the guide device is composed of a fixed guide which is fixed in proximity to the lower drum, disposed in proximity to said fixed guide and a swingable swing guide, the lower drum, axis A plurality of annular grooves spaced apart from each other in the direction of the outer circumferential surface excluding the portion provided with the cutting blade, and the fixed guide is inserted into the annular groove without contacting the drum. A drum-type running-cutting machine is provided, characterized in that it has a shaped part .
[0009]
According to the configuration of the present invention, the lower drum is supported by, for example, a shaft box fitted to the in-row portion of the fixed frame, and there is no up and down swinging operation, and only the cutting operation is performed while rotating in conjunction with the upper drum. Since there is no eccentric movement of the lower drum as in the prior art, the guide device can be arranged close to the lower drum. Accordingly, since the gap dimension can be kept very narrow (for example, about 0.1 to 2 mm) and kept constant, it is possible to greatly reduce the entanglement in the gap portion when the strip passes through, and the leading edge is pushed or folded. Break due to can be eliminated. In addition, by fixing the fixed guide to the shaft box of the lower drum and attaching the swing guide to the support roll on the entry / exit side, the swing guide is simply swung to prevent interference between the fixed guide and the swing guide. It is possible to easily replace the drum. Further, since the comb-shaped portion of the fixed guide is fitted without contacting the annular groove of the lower drum, there is substantially no gap on the upper surface, and the strip can be reliably prevented from being caught in the gap portion.
[0010]
According to a preferred embodiment of the present invention, the cutting device (18) comprises an eccentric ring (18a) that supports the upper drum, and a drive device (19) that rotationally drives the eccentric ring. With this configuration, the eccentric ring (18a) can be rotationally driven by the drive device (19) to drive only the upper drum up and down.
[0011]
Further, according to the present invention, the cylindrical upper and lower drums (12a, 12b) that are driven to rotate synchronously with each other around the horizontal axis, and the upper and lower drums respectively attached to the synchronous positions of the outer periphery of the drum. In a drum-type running cutter that includes a cutting blade (14) and rotates the upper and lower drums at high speed to cut the strip, the upper and lower drums (12a, 12b) have a protector member (15) that covers the blade surface of the cutting blade. The upper and lower cutting blades (14) are located radially inward of the upper and lower joint protector members (15), and the protector member has an outer peripheral surface flush with the outer peripheral surface of the drum or a cutting blade. (14) Only the vicinity of (14) is urged radially outward so as to be higher than the outer peripheral surface of the drum, and is compressed inward by a facing cutting blade during strip cutting. Ram-fly cutting machine is provided.
According to the configuration of the present invention, the protector member (15) that can expand and contract in the radial direction of the drum always protrudes slightly from the tip of the cutting blade to prevent contact between the cutting blade and the strip. Is pressed and shrunk inward to cut the strip. Therefore, by rotating the lower drum (12b) in synchronization with the line speed during line operation and supporting the strip with this lower drum, the lower drum is always rotated in synchronization with the strip without contacting the blade edge when passing the plate. Since it is possible, the abrasion at the time of passing is eliminated.
[0014]
The gap between the lower drum and the fixed guide and the gap between the fixed guide and the swing guide may be set to 0.1 to 10 mm. With this configuration, it is possible to substantially prevent the strip from being caught in the gap portion with a simple structure without providing an annular groove or a comb-like portion.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.
FIG. 1 is an overall configuration diagram of a drum-type running cutter according to the present invention. As shown in this figure, the drum-type running cutter 10 according to the present invention includes cylindrical upper and lower drums 12a and 12b, upper and lower cutting blades 14 attached to the outer periphery of the drum, and upper and lower axle boxes 16a and 16b. The cutting device 18 and the guide device 20 are included.
[0016]
The upper and lower drums 12a and 12b are rotationally driven in synchronism with each other by a driving device (not shown) around the horizontal axis centers Z1 and Z2. The upper and lower cutting blades 14 are attached to the synchronous positions of the drum outer periphery, and when the cutting blade 14 of the upper drum 12a is located at the lowermost position, the cutting blade 14 of the lower drum 12b is located at the uppermost position. It is like that. The upper and lower axle boxes 16a and 16b rotatably support the upper and lower drums 12a and 12b, respectively. Among these, the rotation center (axial center) of the lower shaft box 16b is always fixed at a fixed position. The upper shaft box 16a is supported so as to be movable up and down.
[0017]
In this example, the cutting device 18 includes an eccentric ring 18a that supports the upper shaft box 16a and a drive device 19 that rotationally drives the eccentric ring 18a. The drive device 19 has a pinion gear that meshes with a spur gear provided on the eccentric ring 18a. By rotating the pinion gear, the eccentric ring 18a is rotated about its eccentric axis Z3. ing. With this configuration, only the upper shaft box 16a can be driven up and down by the amount of eccentricity e of the rotation shafts Z1 and Z2 of the upper drum 12a.
[0018]
FIG. 2 is an AA arrow view of FIG. As shown in FIGS. 1 and 2, the guide device 20 includes a fixed guide 21 fixed in the vicinity of the lower drum 12 b and a swing guide 22 disposed in the vicinity of the fixed guide 21. The swing guide 22 is mounted so as to be swingable concentrically with the front and rear (in / out) support rolls 8. By simply swinging the swing guide, interference between the fixed guide 21 and the swing guide 22 occurs. The drums can be changed easily by eliminating
[0019]
In this embodiment, the lower drum 12b has a plurality of annular grooves 13 on the outer peripheral surface spaced apart from each other in the axial direction. Further, the fixed guide 21 has a comb-shaped portion 21a formed so as to be inserted into the annular groove 13 without contacting the lower drum 12b. Further, in this example, the support roll 8 is provided with an annular groove 8a similar to the lower drum 12b, and the comb-shaped portions 21b and 22a are also provided at the end of the swing guide 22 of the fixed guide 21 and at both ends of the swing guide 22. , 22b are provided. With this configuration, the comb-shaped portion 21a of the fixed guide 21 is inserted without coming into contact with the annular groove 13 of the lower drum 12b, so that there is substantially no gap on the upper surface, and the strip is surely pushed into the gap portion. Can be prevented. The gap between the lower drum 12b and the fixed guide 21 and the gap between the fixed guide 21 and the swing guide 22 are preferably set to 1 to 5 mm, and more preferably set to the thickness of the strip 1 or less.
[0020]
FIG. 3 is an enlarged view of a portion B in FIG. As shown in this figure, the cutting blade 14 is positioned inside the outer peripheral surface of the drum 12b by the blade fixture 14a. Further, a protector member 15 that covers the blade surface of the cutting blade 14 is provided. The protector member 15 is attached to the swing shaft 15a by a compression spring 17 so that the outer peripheral surface thereof is flush with the outer peripheral surface of the drum 12b so as to be flush with the outer periphery of the drum 12b. The cutting blade 14 is configured to be compressed inwardly. This configuration is common to the upper and lower drums.
Further, the annular groove 13 described above is provided on the outer peripheral surface of the drum 12b and the outer peripheral surface of the protector member 15 of the lower drum.
As shown in FIG. 3B, when the cutting blade 14 is flush with or slightly higher than the outer periphery of the drum, the protector member 15 is installed higher than the cutting edge only in the vicinity of the cutting blade, and the comb tooth groove is provided only in the protector member. You can also.
[0021]
4A and 4B are operation explanatory views of the drum-type running cutter according to the present invention, in which FIG. 4A shows the time of feeding and FIG. 4B shows the time of cutting. As shown in FIG. 5A, the protector member 15 covers the blade surface of the cutting blade 14 when passing, and the outer peripheral surface thereof is urged by the compression spring 17 and is flush with the outer peripheral surface of the drum 12b. Therefore, even if the strip 1 is directly supported by the lower drum 12b, the cutting blade 17 and the concave portions before and after the cutting blade 17 do not directly contact the strip 1, so that the strip can be prevented from being scratched.
Further, as shown in FIG. 5B, at the time of cutting, the protector member 15 is compressed inward against the compression spring 17 by the opposing cutting blade 14 and the strip 1, and the strip 1 can be cut normally. .
[0022]
According to the configuration of the present invention described above, the lower drum 12b is supported by, for example, the shaft box 16b fitted to the in-row portion of the fixed frame, has no up-and-down swing operation, and is cut while rotating in conjunction with the upper drum 12a. Since only the operation is performed, there is no eccentric movement of the lower drum as in the prior art, so that the guide device 20 can be arranged close to the lower drum. Accordingly, since the gap dimension can be kept very narrow (for example, about 0.2 to 2 mm) and kept constant, it is possible to greatly reduce the entanglement in the gap portion when the strip passes through, and the tip portion is pushed or folded. Break due to can be eliminated.
[0023]
Further, the protector member 15 that can expand and contract in the radial direction of the drum always protrudes slightly from the tip of the cutting blade to prevent contact between the cutting blade and the strip, and is pushed inward by the opposing cutting blade and the cutting strip when the strip is cut. To compress and cut the strip. Therefore, by rotating the lower drum 12b in synchronization with the line speed during line operation and supporting the strip with this lower drum, the lower drum can always rotate in synchronism with the strip without contacting the blade edge during feeding. Abrasion when passing is eliminated.
[0024]
In addition, this invention is not limited to embodiment mentioned above, Of course, it can change variously in the range which does not deviate from the summary of this invention.
[0025]
【The invention's effect】
As described above, according to the present invention, (1) by eliminating the up and down movement of the lower drum, the gap with the apron (guide device) can be maintained constant, and the breakage due to the plunging or folding of the tip is eliminated. (2) Since the lower drum does not move up and down during the cutting operation, the strip support surface is always kept constant, and even if the slack of the strip due to the fluctuation of the tension of the strip occurs, it can be conveyed without any trouble.
[0026]
Therefore, the drum-type running-cutting machine of the present invention has a leading end in the gap between the passing plate portions due to the jumping of the tip due to the uneven surface conveyance between the table rollers and the self-weight deflection in the normal passing plate and the passing plate immediately after cutting. Has an excellent effect of improving the sheet passing property, such as preventing plunging or folding due to flying and eliminating strip loops.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a drum-type running cutter according to the present invention.
FIG. 2 is a view taken in the direction of arrows AA in FIG.
FIG. 3 is an enlarged view of a part B in FIG. 1;
FIG. 4 is an operation explanatory view of the drum type running cutter according to the present invention.
FIG. 5 is an explanatory diagram of a conventional drum-type running cutter.
FIG. 6 is a configuration diagram of another conventional drum-type running cutter.
[Explanation of symbols]
1 Plate material (strip)
2 Cutting blade 3 Drum 4 Eccentric ring 5 Table roller 6 Oscillating roll 7 Guide 8 Support roll 8a Annular groove 10 Drum type running cutters 12a, 12b Upper and lower drums 13 Annular groove 14 Cutting blade 14a Blade fixing tool 15 Protector member 15a Swing shafts 16a and 16b Upper and lower shaft boxes 17 Compression spring 18 Cutting device 18a Eccentric ring 19 Drive device 20 Guide device 21 Fixed guides 21a and 21b Comb portion 22 Swing guides 22a and 22b Comb portion

Claims (4)

Cylindrical upper and lower drums that are driven to rotate synchronously with each other around a horizontal axis, upper and lower cutting blades respectively attached to synchronous positions on the outer periphery of the drum, and upper and lower drums that rotatably support the upper and lower drums A shaft box, a cutting device that drives only the upper drum up and down, and a guide device that is disposed close to the lower drum and has an upper surface along the plate passing direction of the strip,
The axis of the lower drum is fixed at a fixed position,
The gap between the lower drum and the guide device is set to an interval that can prevent the strip from being caught in the gap,
Wherein the upper and lower drum is rotated at a high speed cutting the strip,
The guide device includes a fixed guide fixed in the vicinity of the lower drum, and a swing guide that is disposed in the vicinity of the fixed guide and can swing.
The lower drum has a plurality of annular grooves spaced apart from each other in the axial direction on almost the entire circumference of the outer peripheral surface excluding the portion provided with the cutting blade, and the fixed guide is annular without contacting the drum. Having a comb-like portion inserted into the groove,
A drum-type running-cutting machine characterized by that.   2. The drum-type running cutter according to claim 1, wherein the cutting device includes an eccentric ring that supports the upper drum and a drive device that rotationally drives the eccentric ring.   Cylindrical upper and lower drums that are driven to rotate synchronously with each other around a horizontal axis, and upper and lower cutting blades respectively attached to synchronous positions on the outer periphery of the drum, and the upper and lower drums are rotated at high speed. In the drum-type running cutter for cutting the strip, the upper and lower drums are provided with protector members that cover the blade surfaces of the cutting blades, and the upper and lower cutting blades are located radially inward from the upper and lower joint protector members. The protector member is attached by being urged radially outward so that the outer peripheral surface thereof is flush with the outer peripheral surface of the drum or only the vicinity of the cutting blade is higher than the outer peripheral surface of the drum, and when the strip is cut. The drum-type running cutter according to claim 1 or 2, wherein the drum-type running cutter is compressed inward by an opposing cutting blade. The drum-type running cutting machine according to claim 1 , wherein a gap between the lower drum and the fixed guide and a gap between the fixed guide and the swing guide can be set to a limit that does not interfere with each other.

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