JP2000084726A - Drum-type flying cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably improve the board passing performance of a drum type flying cutter for preventing the leaping of a point when conveyed on an uneven surface between the table rollers, the insertion of the point into a gap between board passing parts by the self-weight deflection, the bending by the flying, and the generation of a loop of a strip relative to a tip board of the strip, an ordinary passing board and a passing board immediately after the cutting. SOLUTION: A drum-type flying cutter comprises cylindrical upper and lower drums 12a, 12b rotated and driven in synchronization with each other on a horizontal axis, upper and lower cutting blades 14 respectively mounted on the synchronous positions on the outer peripheral parts of the drums, upper and lower journal boxes 16a, 16b rotating and supporting the upper and lower drums, a cutting device for vertically driving only the upper journal box, and a guide device 20 arranged in adjacent to the lower drum, and a strip 1 is cut by rotating the upper and lower drums at a high speed in a state that an axis of the lower drum 12b is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type cutting machine for cutting a plate material fed at a high speed.

[0002]

2. Description of the Related Art In sheet rolling equipment or refining equipment,
2. Description of the Related Art In recent years, a traveling type cutting machine has been widely used in order to increase the continuity of equipment and the speed of sheet passing. Such a traveling type cutting machine includes a swing type, a drum type, and others. As an example of a drum type traveling cutting machine, a drum type traveling shearing machine (Japanese Unexamined Patent Application Publication No.
No.-123919) has already been proposed.

As shown schematically in FIG. 5A, a drum type traveling cutting machine disclosed in Japanese Patent Application Laid-Open No. 5-123919 is equipped with a pair of upper and lower cutting blades 2 for cutting a plate (strip 1). 3 is synchronously rotated by a driving device (not shown).
The bearings of the upper and lower drums are supported by the eccentric ring 4. By rotating the eccentric ring 4 in synchronization, the drum interval is opened and closed by the amount of eccentricity of the eccentric ring 4 while the upper and lower drums are rotating at high speed. Then, as shown in FIG. 5C, the strip 1 is cut. Further, in the case where the leading end and the tail end of the cut material are not passed or cut, FIG. 5 (A)
As shown in (D), a table roller 5 built in the lower drum supports the passing plate of the strip 1.

That is, in the conventional drum-type running cutting machine, a pair of upper and lower cutting drums 3 are provided, which are arbitrarily started and stopped in the cutting process. The cutting position (the position where the drum is opened and the cutting blade does not contact) can be freely controlled by the synchronous rotation of the eccentric ring 4, and after cutting, the machine stops at the state shown in FIG. In addition, the table roller 5 built in the lower drum and the oscillating rolls 6 provided before and after the lower roller make it possible to smoothly pass the strip 1.

[0005]

However, as the cutting speed increases, the cutting process shown in FIG.
The interval between the lower drum 2 and the front and rear rocking rolls 6 is such that the drum 3 is structurally rotated and rocked by the eccentric ring 4 in FIG.
The gap at the time of passing the strip tip becomes large (for example, the pitch between the rolls is 250 mm or more), and particularly, 0.6 to 3.2 m.
When processing a thin sheet material having a thickness of about m, the transport on the table roller is a non-uniform plane, so that the tip of the strip jumps or is bent by its own weight, so that the tip of the lower drum 2
When the line is stopped between the oscillating roll 6 and the exit side swing roll 6 and the line is stopped, a phenomenon in which the air resistance is added to the state in which the end jumps and the air resistance increases (flying phenomenon) occurs, and when the amount of flying is excessive, the end is bent, There is a problem that the line may be stopped due to multiple folding. 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, and 1 was entangled, the strip was folded or cut, the equipment was damaged, and the line was stopped in some cases.

In order to solve the above-mentioned problem, as shown schematically in FIG. 6, the cutting blade 2 is provided inside the outer diameter of the protector 9 of the cutting blade 2 attached to the drum 3, and the lower drum is provided. There has also been proposed a drum type cutting machine in which the strip 1 can be supported by the protector 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 cutting machine, since the upper and lower drums 3 swing by the eccentric ring 4, the gap between the guide 7 and the drum 3 becomes large (for example, 10 mm or more), and the leading end of the strip 1 is caught in between. Problems arise. When the swingable guide 7 is attached downward from the strip passage surface of the lower drum in order to prevent the strip from being inserted, the leading end of the strip hits the movable guide part which is inclined, causing a flying phenomenon and the leading end being bent. Sometimes the line was stopped.

The present invention has been made to solve the above-mentioned problems. That is, the object of the present invention is:
In the leading end of the strip or in the normal passing and immediately after cutting, the continuous passing surface of the strip is used as a continuous surface, and the step of unevenness is reduced so that the leading end of the strip can be folded multiple times due to flying, or a gap can be formed. It is an object of the present invention to provide a drum type traveling cutting machine which prevents a rush into a drum and eliminates a space in which a strip accumulates in a loop even when there is a fluctuation in tension, thereby preventing a roll from being wound around a drum.

[0008]

According to the present invention, cylindrical upper and lower drums (12a, 12b) which are driven to rotate in synchronization with each other about a horizontal axis, and a synchronous position of the outer peripheral portion of the drum. Upper and lower cutting blades respectively attached to the (14)
And upper and lower axle boxes (16a,
16b) and a cutting device (1) that drives only the upper drum up and down.
8) and a guide device (2
0), wherein the upper and lower drums are rotated at a high speed while the axis of the lower drum is fixed to cut the strip.

According to the configuration of the present invention, the lower drum (1
2b) is supported, for example, by an axle box (16b) fitted to the spigot portion of the fixed frame, and does not perform up-down swinging operation, and performs only cutting operation while rotating in conjunction with the upper drum (12a). As there is no eccentric movement of the lower drum,
The guide device (20) can be arranged close to the lower drum. Therefore, the gap size is very narrow (for example, 0.
(Approximately 1 to 2 mm) and can be kept constant, so that the winding into the gap when the strip is passed can be greatly reduced, and breakage due to penetration or breakage of the leading end can be eliminated.

According to a preferred embodiment of the present invention, the cutting device (18) includes an eccentric ring (18) for supporting an upper drum.
a) and a driving device (19) for rotatingly driving the eccentric ring. With this configuration, only the upper drum can be driven up and down by rotating the eccentric ring (18a) by the driving device (19).

Further, according to the present invention, the upper and lower cylindrical drums (12a, 12b) driven to rotate in synchronization with each other about a horizontal axis are attached to the synchronous positions of the outer peripheral portions of the drums. And upper and lower cutting blades (14),
In a drum type traveling cutting machine that cuts a strip by rotating the upper and lower drums at a high speed, the upper and lower drums (12a, 12a) are cut.
b) includes a protector member (15) for covering the blade surface of the cutting blade, wherein the upper and lower cutting blades (14) are located radially inward from the upper and lower protector members (15), and the protector member is The outer peripheral surface is flush with the outer peripheral surface of the drum, or is mounted by being urged radially outward such that only the vicinity of the cutting blade (14) is higher than the outer peripheral surface of the drum, and faces at the time of strip cutting. A drum type traveling cutter is provided, which is compressed inward by a cutting blade. With the configuration of the present invention, the protector member (15) that can expand and contract in the radial direction of the drum always slightly protrudes from the tip of the cutting blade to prevent contact between the cutting blade and the strip,
When the strip is cut, it is pushed by the opposing cutting blade and the cutting strip and compressed inward to cut the strip. Therefore, the lower drum (12b) is rotated in synchronism with the line speed during the line operation, and the strip is supported by the lower drum. As a result, abrasion at the time of threading is eliminated.

Further, the guide device (20) includes a fixed guide (21) fixed close to the lower drum, and a swing guide (22) arranged close to the fixed guide and capable of swinging. Consists of With this configuration, the fixed guide (2
1) is fixed to the axle box (16b) of the lower drum and the like, and the swing guide (22) is attached to the support roll 8 on the entry / exit side. The drum can be easily replaced by eliminating the interference between the drum and the swing guide (22).

Further, the lower drum (12b) has a plurality of annular grooves (13) spaced apart from each other in the axial direction on the outer peripheral surface, and the fixed guide (21) is annular without contacting the drum. It preferably has a comb-like portion (21a) that fits in the groove. With this configuration, the comb-shaped portion (21a) of the fixed guide (21) is formed in the annular groove (1) of the lower drum (12b).
Since it fits without contacting 3), there is substantially no gap on its upper surface, and it is possible to reliably prevent the strip from being caught in the gap.

A gap between the lower drum and the fixed guide;
And the clearance between the fixed guide and the swing guide is 0.1 to 10 mm
May be set. With this configuration, it is possible to substantially prevent the strip from being caught in the gap with a simple structure without providing an annular groove or a comb-like portion.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In addition, the same reference numerals are given to the common parts in the respective drawings, and the duplicate description will be 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 traveling cutting machine 10 of the present invention comprises cylindrical upper and lower drums 12a, 12a.
b, upper and lower cutting blades 1 attached to the outer periphery of the drum
4, upper and lower axle boxes 16a, 16b, a cutting device 18, and a guide device 20.

The upper and lower drums 12a and 12b are driven to rotate about a horizontal axis Z1 and Z2 in synchronization with each other by a driving device (not shown). The upper and lower cutting blades 14 are attached to each other at a synchronous position of the drum outer peripheral portion. When the cutting blade 14 of the upper drum 12a is located at the lowest position, the cutting blade 14 of the lower drum 12b is located at the highest position. It has become. Upper and lower axle boxes 16a, 16b
Are rotatably supporting the upper and lower drums 12a and 12b, respectively. Among them, the lower shaft box 16b has its rotation center (axial center) always fixed at a fixed position. Also, upper shaft box 1
6a is supported so that it can move up and down.

The cutting device 18 is, in this example, an upper shaft box 16.
a), and a driving device 19 for rotating and driving the eccentric ring 18a. The drive device 19 has a pinion gear meshing with a spur gear provided on the eccentric ring 18a, and by rotating this pinion gear, rotates the eccentric ring 18a about its eccentric axis Z3. ing. With this configuration, the rotation axis Z of the upper drum 12a
Only the upper shaft box 16a can be driven up and down by the eccentric amount e of Z1 and Z2.

FIG. 2 is a view taken in the direction of arrows AA in FIG. FIG.
As shown in FIG. 2 and FIG.
A fixed guide 21 is fixed in the vicinity of the fixed guide 2b, and a swing guide 22 is disposed in the vicinity of the fixed guide 21. The swing guide 22 includes front and rear (in / out side) support rolls 8.
The swing guide is mounted concentrically with the swing guide, and by simply swinging the swing guide, the interference between the fixed guide 21 and the swing guide 22 is eliminated so that the drum can be easily replaced.

In this embodiment, the lower drum 12b
Has a plurality of annular grooves 13 spaced apart from each other in the axial direction on the outer peripheral surface. Further, the fixed guide 21 has a comb-shaped portion 21a formed so as to fit into the annular groove 13 without contacting the lower drum 12b. Further, in this example, the support roll 8 is formed in the same annular groove 8a as the lower drum 12b.
The end portions of the swing guide 22 of the fixed guide 21 and both end portions of the swing guide 22 are also comb-shaped portions 21b and 22a.
22b is provided. With this configuration, the comb-shaped portion 21a of the fixed guide 21 is fitted without contacting the annular groove 13 of the lower drum 12b, so that there is substantially no gap on the upper surface, and the strip can be reliably pushed into the gap. Can be prevented. In addition, the present invention is not limited to this configuration.
mm, and more preferably, may be set to be equal to or less than the thickness of the strip 1. With this configuration, it is possible to substantially prevent the strip from being caught in the gap with a simple structure without providing an annular groove or a comb-like portion.

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 fixing tool 14a. In addition, a protector member 15 that covers the blade surface of the cutting blade 14 is provided. The protector member 15 includes a swing shaft 15a.
Is attached by being biased radially outward by a compression spring 17 so that the outer peripheral surface thereof is flush with the outer peripheral surface of the drum 12b, and is compressed inward by the cutting blade 14 facing the strip cutting. It is configured as follows. This configuration is common to the upper and lower drums. Further, the above-described annular groove 13 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. FIG.
As shown in (b), when the cutting blade 14 is flush with or slightly higher than the outer periphery of the drum, the protector member 15 can be installed higher than the cutting edge only in the vicinity of the cutting blade, and the comb teeth groove can be provided only on the protector member. .

FIGS. 4A and 4B are explanatory diagrams of the operation of the drum type cutting machine according to the present invention, wherein FIG. As shown in (A), when passing the plate, the protector member 15 covers the blade surface of the cutting blade 14, and the outer peripheral surface is urged by the compression spring 17 to be flush with the outer peripheral surface of the drum 12b. Therefore, the strip 1 is directly
Even if the cutting blade 17 is supported, 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 (B), at the time of cutting, the protector member 15 is pressed inward by the opposing cutting blade 14 and the strip 1 against the compression spring 17, and the strip 1 can be cut normally. .

According to the above-described structure of the present invention, the lower drum 12b is supported by, for example, the shaft box 16b fitted to the spigot part of the fixed frame, and does not swing up and down, and rotates in conjunction with the upper drum 12a. While performing only the cutting operation while
Since there is no eccentric movement of the lower drum as in the related art, the guide device 20 can be arranged close to the lower drum. Therefore, the gap size can be kept very narrow (for example, about 0.2 to 2 mm) and constant, so that the winding into the gap when the strip is passed can be greatly reduced,
Breakage due to piercing or breaking of the tip can be eliminated.

The protector member 15 which can expand and contract in the radial direction of the drum always slightly projects from the tip of the cutting blade to prevent contact between the cutting blade and the strip, and is pushed by the opposing cutting blade and cutting strip during strip cutting. Press inward to cut the strip. Therefore, by rotating the lower drum 12b in synchronization with the line speed during the line operation, and supporting the strip with the lower drum,
Since the lower drum can be constantly rotated in synchronization with the strip without the blade edge contacting during the passing, the abrasion during the passing is eliminated.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

[0025]

As described above, according to the present invention, by eliminating the vertical movement of the lower drum, the gap with the apron (guide device) can be kept constant, and the breakage due to the tip end being pierced or broken. Since the lower drum does not move up and down during the cutting operation, the strip supporting surface is always kept constant, and even if the strip is loosened due to the fluctuation in the tension of the strip, the strip can be conveyed without any trouble.

Therefore, the drum type cutting machine according to the present invention comprises:
In normal passing and immediately after cutting, the tip jumps into the gap between the passing plates or breaks due to flying due to the jump of the tip due to the uneven surface transport between the table rollers and the bending of its own weight, and the strip loops. It has an excellent effect of improving the sheet passing property such that generation can be eliminated.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a drum type running cutting machine according to the present invention.

FIG. 2 is a view taken along the line AA of FIG. 1;

FIG. 3 is an enlarged view of a portion B in FIG. 1;

FIG. 4 is an explanatory view of the operation of the drum type running cutter according to the present invention.

FIG. 5 is an explanatory view of a conventional drum type running cutter.

FIG. 6 is a configuration diagram of another conventional drum-type running cutting machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate material (strip) 2 Cutting blade 3 Drum 4 Eccentric ring 5 Table roller 6 Swinging roll 7 Guide 8 Support roll 8a Circular groove 10 Drum type running cutter 12a, 12b Upper and lower drums 13 Circular groove 14 Cutting blade 14a Blade fixing Tool 15 Protector member 15a Swing shaft 16a, 16b Upper and lower axle box 17 Compression spring 18 Cutting device 18a Eccentric ring 19 Drive device 20 Guide device 21 Fixed guide 21a, 21b Comb portion 22 Swing guide 22a, 22b Comb portion

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hisashi Sato 1 Shinnakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawashima-Harima Heavy Industries, Ltd. Yokohama Engineering Center (72) Inventor Hiroaki Kuwano Isogo-ku, Yokohama-shi, Kanagawa No. 1, Shin-Nakahara-cho, Ishikawashima-Harima Heavy Industries, Ltd. Yokohama Engineering Center (72) Inventor Yasuhiro Fujii No. 1, Shin-Nakahara-cho, Isogo-ku, Yokohama, Kanagawa, Japan Ishi-Kawashima-Harima Heavy Industries, Ltd. Yokohama Engineering Center (72) Inventor Yoshiyuki Toritani Nishi-no-Ichibanchi, Oita-shi, Oita Prefecture Nippon Steel Corporation Oita Works (72) Inventor Michinori Kondo Nishi-no-Ichibanchi, Oita-shi Oita Prefecture Oita Prefecture Nippon Steel Oita Steel Co., Ltd. In-house F-term (reference) 3C039 EA31

Claims (6)

[Claims] 1. A cylindrical upper and lower drum (12a, 12b) driven to rotate in synchronization with each other about a horizontal axis.
And upper and lower cutting blades (14) respectively attached to the synchronous position of the outer periphery of the drum, upper and lower axle boxes (16a, 16b) for rotatably supporting the upper and lower drums, and a cutting device for driving only the upper drum up and down (18) and a guide device (20) arranged close to the lower drum, wherein the strip is cut by rotating the upper and lower drums at high speed while keeping the axis of the lower drum fixed. Type running cutting machine. 2. The cutting device (18) comprises an eccentric ring (18a) for supporting the upper drum and a driving device (19) for rotating the eccentric ring.
4. The drum type running cutting machine according to 1. 3. Upper and lower cylindrical drums (12a, 12b) driven to rotate in synchronization with each other about a horizontal axis.
And an upper and lower cutting blade (14) attached to a synchronous position of the outer peripheral portion of the drum, wherein the upper and lower drums (12a) , 12b) are provided with a protector member (15) for covering the blade surface of the cutting blade, and the upper and lower cutting blades (14) are located radially inward of the upper and lower protector members (15). Is mounted radially outward so that its outer peripheral surface is flush with the outer peripheral surface of the drum, or only the portion near the cutting blade (14) is higher than the outer peripheral surface of the drum. 3. The drum type traveling cutting machine according to claim 1, wherein the cutting blade is compressed inward by a cutting blade. 4. A guide (20) comprising: a fixed guide (21) fixed in proximity to a lower drum; and a swing guide (2) arranged in close proximity to the fixed guide and capable of swinging.
4. The drum type cutting machine according to claim 1, wherein the drum cutting machine comprises: 5. The lower drum (12b) has a plurality of annular grooves (13) which are spaced apart from each other in the axial direction on the outer peripheral surface, and the fixed guide (21) is annular without contacting the drum. The drum type cutting machine according to claim 4, further comprising a comb-shaped portion (21a) fitted in the groove. 6. The drum type according to claim 4, wherein the gap between the lower drum and the fixed guide and the gap between the fixed guide and the swinging guide can be set as narrow as possible without interfering with each other. Cutting machine while running.