JP2003080415A - Shearing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shearing machine capable of smoothly delivering a metal plate cut by a rotary blade in the specified direction even in the case when its width is small. SOLUTION: A plate patch member 10 contacting a cut metal plate 2 is arranged to correct (bending back) a bending caused at cutting by reaction force at its contact in the shearing machine to cut the metal plate P by the rotary blades 2, 3 arranged in a pair.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing machine such as a side trimmer or a slitter which cuts a metal plate with a pair of rotary blades arranged in pairs.

[0002]

2. Description of the Related Art Generally, a process of manufacturing a metal plate includes a step of cutting a plate manufactured by rolling or the like into a predetermined width with a shearing machine. For example, strip-shaped steel sheets are manufactured by cutting off the trim edges on both sides (edges on both sides called ears), which are not highly precise in terms of size and shape, with a shearing machine called a side trimmer. It is common.

The general structure of the side streamer is as shown in FIG. The side streamer (shearing machine) 1 has rotary blades (lower blade and upper blade) 2.3 arranged in pairs vertically, and the steel plate P is in a horizontal state. It is sent between 3 and receives shearing force from them and is cut. By disposing such side trimmers 1 on both sides of the pass line, the steel plate P
The trim edges P2 on both sides are cut off smoothly. A conventional shearing machine such as a side streamer is described in JP-A-53-71387.

The cut trim edge is sent by a predetermined route to a processing machine for making scrap easy to handle. In the case of FIG. 2A, the cylindrical guide 4
It is sent through the inside of 1 to a processing machine 40 called a chopper, where it is finely divided into scraps.

[0005]

In the conventional side trimmer, the separated trim edges are not straight,
In a natural state, the curl is sent out in an arc shape so as to curl. That is why the trim edge bends that way.
In the example of (a), the trim edge P2 at the time of cutting is
This is because the upper rotary blade (upper blade) 3 pushes and bends downward to cause plastic deformation (permanent deformation).

Since the trim edge sent out from the side trimmer in a bent state does not advance straight in a certain direction because it is bent, the tip portion and the like are easily caught by a small step or protrusion. Therefore,
Even if the guide 41 is provided as in (a), it does not always enter smoothly into the guide 41 or is caught in the middle and is not always stably sent to the processor 40.
If the trim edge does not enter the guide or gets caught in the middle of the guide, the production efficiency is significantly reduced because the side trimmer must be temporarily stopped and the operator must process the trim edge step by step.

A similar problem is a slitter for cutting a metal plate (not limited to a steel plate) into a predetermined width.
It also occurs in other shearing machines. If the width of the metal plate (cut piece) formed by cutting is narrow, the metal plate is bent and sent for the same reason as for the trim edge,
It is difficult to send it smoothly to the downstream side.

The present invention provides a shearing machine capable of smoothly feeding a metal plate cut by a rotary blade in a predetermined direction even when its width is narrow.

[0009]

A shearing machine according to claim 1 is a shearing machine which cuts a metal plate by a pair of rotary blades arranged in a pair, and a plate contact which comes into contact with the cut metal plate. It is characterized in that the member is arranged at a position where the bending generated at the time of cutting can be corrected (that is, bent back) by the reaction force at the time of contact. A plurality of plate contact members may be arranged so as to come into contact with both of the cut and separated metal plates, but it may be arranged so as to come into contact with only the metal plate on the narrow side.

According to this shearing machine, even a metal plate such as a trim edge or a narrow cutting piece that is easily pushed and bent by the rotary blade at the time of cutting can reduce its bending or eliminate bending. It can be sent smoothly in a predetermined direction. This is because even if the cut metal plate (cutting piece) is pressed and bent by the rotary blade at the time of cutting, it immediately comes into contact with the plate contact member and the bending is corrected by the reaction force due to the contact.

The correction of bending by the plate contact member will be described with reference to FIG. 1 (b), for example. That is, the metal plate P
Is cut by a pair of rotary blades (lower blade / upper blade) 2/3, and the cutting piece P2 on the front side in the figure is pressed and bent downward by the rotary blade 3 while being cut. The cut piece P
Immediately after being pressed and bent, 2 comes in contact with the outer peripheral surface of the ring 13 (plate contact member 10) at an appropriate position with a certain distance from the cutting point, and is bent back upward, whereby downward direction at the time of cutting The bend is corrected. If the degree of bending back is appropriate, the cut piece P2 is sent out obliquely downward (or in a set arbitrary direction) with almost no bending.

When the bending is corrected in this way, the cut pieces are smoothly sent to a downstream line for producing a metal plate or to a processing machine for scraping, resulting in production. The efficiency is improved and the burden on workers is reduced.

The shearing machine according to claim 2 further comprises:
The size or arrangement of the plate contact member, the size and arrangement of the rotary blade,
Alternatively, it can be changed according to the specifications (thickness, material, etc.) of the metal plate. Changing the size or arrangement of the plate contacting member means changing the plate contacting member with a different size or changing the same plate contacting member in order to make the contact position between the cut plate and the plate contacting member appropriate. Changing the position or posture while using it.

In order to arrange the plate abutting member so that the bending of the metal plate (cutting piece) generated at the time of cutting can be corrected by the contact reaction force, the metal plate and the plate can be changed when the rotary blade or the metal plate is changed. It is necessary to redefine the position of contact with the contact member. For example, when a thin metal plate is cut, when the cutting piece comes into contact with the plate contact member at a position far away from the cutting position, the contact pressure becomes small and the contact pressure between the two (between the cutting position and the contact position) is increased. Since the span is wide, only elastic deformation occurs in the cut piece, and plastic deformation that occurs during cutting cannot be eliminated. On the other hand, when the cutting piece and the plate contacting member come into contact with each other at a position too close to the cutting position, the contact reaction force is too strong and the deformation due to bending back exceeds the deformation at the time of cutting, and the product is also sent straight to the predetermined direction Things will be difficult.

In this regard, in the shearing machine according to the second aspect, even if the size (diameter) or the arrangement of the rotary blades (overlapping or gap between the opposing blades) is changed or the specifications of the metal plate are changed, those Since the size or arrangement of the plate contact member can be changed according to the above, the contact position between the metal plate and the plate contact member can always be appropriately determined. Therefore, in this shearing machine, the cut piece of the metal plate can be smoothly fed in a predetermined direction with a small bend, including when the cutting condition is changed.

The shearing machine according to the third aspect of the present invention is, in particular, an annular spacer for adjusting the axial position of the rotary blade (at least one of the pair of rotary blades) on the rotary shaft. And the outer peripheral portion of the spacer is used as a plate contact member. The annular spacer referred to here is one that is mounted on the rotary shaft of at least one of the rotary blades, after adjusting the axial positional relationship between the rotary blades and setting the thickness appropriately to smooth the shearing. And
An example is the member indicated by reference numeral 5 shown in FIG. 1 (a) or FIG. 2 (b). The outer peripheral portion of the spacer refers to the outer peripheral surface of the spacer itself, or another member attached on the outer periphery of the spacer.

In most cases, the annular spacer as described above is mounted on the shaft of at least one rotary blade, and the outer peripheral portion thereof is shown in FIG. 1 (a) or FIG.
As shown in (b), it is located at a position close to the other rotary blade, that is, the rotary blade on the side that pushes and bends the cut piece that is cut closer to the spacer than the cutting line. The outer peripheral portion of the spacer at such a position is extremely advantageous as a plate contact member for contacting the cutting piece. For example, it is possible to replace a very small component by replacing it with the outer peripheral portion, as described above. It is also possible to change the dimensions and arrangement. Therefore, the shearing machine according to the present invention simplifies the structure of the plate contact member, and the plate contact member can be configured with a small number of parts by making good use of the annular spacer for adjusting the position of the rotary blade. It can be said that this has special advantages.

In the shearing machine according to the fourth aspect, an annular body whose outer diameter can be enlarged / reduced is fitted on the rotary shaft of the rotary blade, and the outer peripheral portion of the annular body is used as the plate contact member. It is characterized by As the annular body whose outer diameter can be enlarged / reduced, for example, one often used for a mandrel (winding shaft) of a coiler (winding machine for steel plates) can be used. The mandrel of the coiler axially moves a wedge-shaped member having an inclined surface inclined in the radial direction by a linear movement means such as a hydraulic cylinder, so that a member arranged in the vicinity of the outer periphery in contact with the inclined surface in the radial direction. It has a structure to displace. Here, also in this case, the outer peripheral portion of the annular body refers to the outer peripheral surface of the annular body itself or another member attached to the outer periphery of the annular body.

In the shearing machine thus constructed, the size or arrangement of the above-mentioned plate contact member can be easily changed by a simple operation of enlarging or reducing the outer diameter of the annular body. Therefore, with this shearing machine, even when the size and arrangement of the rotary blades change or the specifications of the metal plate change, the position where the metal plate and the plate contact member contact can be appropriately and easily determined. Therefore, it becomes possible to smoothly feed the cut piece in a predetermined direction.

A shearing machine according to a fifth aspect of the present invention is such that, on a rotary shaft of a rotary blade, the shearing machine is rotatable relative to the rotary shaft and has an absolute rotation angle (an angle relative to a machine frame or the like of the shearing machine which is an absolute coordinate system). The eccentric annular body whose center axes of the inner and outer circumferences do not coincide with each other is fitted so that the position) can be adjusted and fixed, and the outer peripheral portion of the eccentric annular body is used as a plate contact member. As the eccentric annular body, for example, FIG.
The eccentric wheel 12 shown in FIG. The eccentric ring 12 shown in the drawing is attached to the rotary shaft 4 of the rotary blade 2 via a bearing 11 so as to be rotatable relative to the rotary shaft 4.
2o and the central axis 12p of the outer periphery do not match. Also in the shearing machine of this claim, the outer peripheral portion of the eccentric ring-shaped body serving as the plate contact member refers to the outer peripheral surface of the eccentric ring-shaped body itself or another member attached on the outer periphery of the ring-shaped body.

In this shearing machine, by adjusting the absolute rotation angle of the above-mentioned eccentric annular body, it is possible to change the position of the outer peripheral portion which is eccentrically located from the inner periphery concentric with the rotary blade and the rotary shaft. it can. This is nothing but the fact that the size or arrangement of the plate contact member can be easily changed.Therefore, even with this shearing machine, the metal plate and the plate contact member can be changed regardless of the size and arrangement of the rotary blade or the specification of the metal plate. The contact position with and can always be determined appropriately and easily, so that the cut piece can be smoothly fed in a predetermined direction.

According to a sixth aspect of the shearing machine of the present invention, a ring is attached to the outer periphery of the eccentric annular body so as to be rotatable relative to the eccentric annular body, and the ring is used as a plate contact member. Characterize. The ring referred to here is, for example, the one indicated by reference numeral 13 in FIG. 1, and a ring having no eccentricity between the inner and outer circumferences is used.

In such a shearing machine, there is no inconvenience that the plate wear member is abraded only at a specific portion. It is explained as follows. First, the above-mentioned eccentric annular body does not need to change the absolute rotation angle unless the rotary blade and the metal plate are changed, and the contact portion with the metal plate is usually kept at the same position. Therefore, when the outer peripheral surface of the eccentric annular body itself is used as the plate contact member, there is a possibility that only a specific part of the member will come into contact with the metal plate and be intensively worn. However, in the shearing machine of this claim, since the ring is fitted to the outer periphery of the eccentric annular body so as to be relatively rotatable, the ring rotates in contact with the moving metal plate, and the metal plate on the ring is rotated. The contact point changes from moment to moment. Therefore, even if the absolute rotation angle of the eccentric annular body may not be changed at all due to the same cutting conditions regarding the rotary blade and the metal plate, a specific portion on the ring serving as the plate contact member is locally localized. There is no inconvenience of significant wear.

In the shearing machine according to the seventh aspect, a worm speed reducer is further connected between the eccentric annular body and an operating means (a handle or a drive source such as a motor) for adjusting the absolute rotation angle thereof. It is characterized by

Adjustment of the absolute rotation angle of the eccentric annular body for appropriately determining the contact position with the metal plate is performed by using a handle for manual operation or some drive source rather than directly moving the eccentric annular body itself. It goes without saying that the burden on the worker can be reduced more indirectly by using an appropriate operation means including the above. Then, between the eccentric annular body and such an operating means, in most cases, a means for transmitting power or a means for changing the direction of operation is used. However, it is optimal to connect and use the worm reducer between the eccentric annular body and the operating means as described above. By doing so, you can easily rotate the eccentric annular body by inputting the operating force to the worm and outputting it through the worm wheel,
This is because the reverse rotation prevention (automatic stop) action of the worm reducer keeps the rotational displacement of the eccentric annular body connected to the worm wheel side stopped even if external force or its own weight is applied. That is, the shearing machine of this claim,
In addition to being able to easily adjust the absolute rotation angle of the eccentric annular body, there is a preferable effect that the adjusted absolute rotation angle can be kept unchanged without using any dedicated fixing means such as a brake.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows one mode for carrying out the invention.
~ Shown in FIG. FIG. 1 is a schematic diagram showing the outline of the configuration and operation of a metal plate shearing machine 1, and FIG. 2 is an overall layout diagram of the shearing machine 1 and peripheral devices.
Further, FIG. 3 is a detailed view of a portion A, a portion B, and a CC cross section in FIG.

A shearing machine 1 shown in FIG. 1 and the like is a side streamer arranged on a shear line of a hot rolled steel plate, and a strip steel plate (hot coil) manufactured by hot rolling.
It is a device for cutting off both sides (trim edges) of P. As shown in FIG. 1 (a), a rotating disk-shaped parallel lower blade 2 and upper blade 3, which are shearing blades, are arranged in pairs vertically with their edges close to each other. . When the steel plate P is horizontally fed between the lower blade 2 and the upper blade 3 as shown in FIG. 1 (b) while rotating, the steel plate P is cut based on the shearing force of both blades, and a wide cut piece. P1 and a narrow trim edge (cutting piece) P2 can be separated. The white arrows in the figure indicate the directions of rotation or movement of the lower blade 2, the upper blade 3, and the steel plate P. In FIG. 1, reference numeral 4 is a rotary shaft on which the lower blade 2 is mounted, reference numeral 4a is a mounting flange for the lower blade 2, 4b is a mounting surface in the flange 4a, and 4c are mounting bolts and nuts. Reference numeral 5 is an annular spacer that is mounted between the mounting surface 4b of the flange 4a and the lower blade 2 to determine the axial position of the lower blade 2, and 6 is a holder that fixes the lower blade 2. In this shearing machine, as shown in FIG. 2B, the upper blade 3 is also mounted on the rotary shaft 7 using the holder 8 and the like. And lower blade 2 and upper blade 3
The rotary shafts 4 and 7 to which the and are respectively attached are shown in FIG.
As shown in (b), it is supported by the machine frame 9 and driven to rotate. In addition, since it is necessary to cut the trim edges on both sides, a similar shearing machine is also arranged on the edge portion on the opposite side of the steel plate P.

Regarding the cut pieces P1 and P2 formed by cutting the steel plate P, the wide cut piece P1 to be the product is horizontally sent to the downstream side, and the narrow trim edge P2 is provided.
2 is sent obliquely downward as shown in FIG. 2A to be scraped, and is made to reach the cutting processor (chopper) 40 through a rectangular tubular guide 41. The processing machine 40 finely cuts the trim edge P2 (to a length of about 100 mm) by the action of a blade (not shown) that is arranged oppositely on the rotating body that is arranged oppositely, and re-creates it as scrap. Make it easy to use.

In the shearing machine 1, the trim edge P2, which tends to curl downward and curl at the time of cutting, is straightened as much as possible and fed into the guide 41 so that it can be reliably supplied to the chopper 40. In Fig. 1
The plate contact member 10 is arranged as shown in FIG. less than,
The configuration and function of the plate contact member 10 will be described.

The plate contact member 10 is, as shown in FIG.
The outer peripheral portion of the annular spacer 5 used for the lower blade 2 has an outer diameter slightly smaller than the diameter of the lower blade 2. Even if the spacer 5 itself is used as the plate contact member 10, the original function of correcting the bending of the trim edge P2 is exerted, but it makes it possible to adjust the contact position with the steel plate P, and the contact portion is localized. In the illustrated example, the plate contact member 10 is configured by assembling the rolling bearing 11, the eccentric ring 12, the ring 13, the gear 14 and the like on the outer periphery of the spacer 5 in order to avoid excessive wear.

As shown in FIG. 1 (b), an eccentric ring 12 having a deviation (14 mm deviation in the illustrated example) between the center 12o of the inner circumference and the center 12p of the outer circumference is used as the plate contact member 10. is doing. Since the inner circumference of the eccentric wheel 12 is fitted to the outer peripheral portion of the spacer 5 which is concentric with the lower blade 2 and the rotary shaft 4, the eccentric wheel 12 can be changed by changing the posture (rotation angle) of the eccentric wheel 12. It is possible to change the position of the outer peripheral part (the maximum change width is 28 mm in the example), and it is possible to appropriately change the position at which the ring 13 fitted to the outer periphery contacts the steel plate P. Since the bearing 11 is provided between the spacer 5 fixed on the rotary shaft 4 and the eccentric ring 12, the posture of the eccentric ring 12 can be maintained even while the rotary shaft 4 rotates together with the lower blade 2, and the bearing 13 It is possible to make the contact position with the steel plate P constant. The portion of the plate contact member 10 that actually contacts the steel plate P is the outer peripheral surface of the ring 13. Since the ring 13 is made of carbon steel (hardened material) and the eccentric ring 12 is made of a copper alloy, the ring 13 does not easily wear even when it comes into contact with the trim edge P2, and its contact As a result, the eccentric wheel 12 rotates relatively smoothly on the outer circumference thereof, so that the concentration of wear on a specific portion can be avoided.

The above-mentioned gear 14 in the plate contact member 10
(Fig. 1 (a), etc.) shows an eccentric ring 12 integrated with
It is a part of means for changing the posture of the eccentric wheel 12.
That is, the worm speed reducer 30 connected to the operation handle 20 as shown in FIG. 2 is connected to the gear 14.
The operation rod 21 attached to the machine frame 9 is rotated by the support 21a via the operation handle 20 to rotationally displace the worm side (input side) of the speed reducer 30 (also fixed to the machine frame 9). When given, reducer 30
The worm wheel that meshes with the worm rotates inside,
The gear 14 connected to the wheel side (output side) (see FIG.
(A) etc. are rotated. When the gear 14 rotates, the eccentric ring 12 integrated with it rotates to change its posture, and the contact position between the ring 13 and the steel plate P also changes. When the rotation of the handle 20 is stopped, the worm speed reducer 30
The worm wheel displacement is stopped by the reverse rotation prevention effect of the above, and the posture of the eccentric wheel 12 is held constant.

Trim edge P that tends to curl during cutting
2 can be smoothly fed into the guide 41.
This is because the bending of the trim edge P2 that occurs during cutting is corrected by the contact with the plate contact member 10. That is, as shown in FIG. 1B, the trim edge P2 undergoes downward bending deformation (plastic deformation) at the portion X by being pushed by the upper blade 3 at the time of cutting, but immediately after that, the plate contact member 10 (ring of Conversely, upward bending deformation (plastic deformation) occurs at the portion Y that contacts 13), and both bendings cancel each other, so that the guide 41 is sent almost straight to the guide 41 (see FIG. 2A).

Although the desirable positional relationship between the portion X and the portion Y differs depending on the direction in which the trim edge P2 is fed, in the investigation by the inventors, it is necessary to feed the trim edge P2 obliquely downward as shown in FIG. 1 (b). Is the steel plate P and the plate contact member 10 (ring 13)
It is preferable to set the illustrated distance d from the uppermost part of the to 4 to 5 mm. Even if the diameters and arrangements of the lower blade 2 and the upper blade 3 are changed or the thickness of the steel plate P is changed in the range of about 1 to 20 mm, if the distance d is kept at such a value, the trim edge It is possible to send P2 straight and obliquely downward. When changing the blades 2 and 3 or the steel plate P, it is necessary to change the position of the plate contact member 10 as appropriate, but in the illustrated plate contact member 10, the above-mentioned eccentric ring 12 and means for changing its posture ( The position of the plate contact member 10 can be easily changed by the operation handle 20 or the like.

Regarding the details of the plate contact member 10, the structure shown in FIGS. 3A to 3C is also adopted. That is, a) The eccentric wheel 12 and the gear 14 are formed by separate members as shown in FIG. 3A, and they are integrated by the bolt 14a. This is because each of the eccentric wheel 12 and the gear 14 can be easily manufactured including machining. Reference numeral 12a in the drawing is a positioning ring of the bearing 11, which is fixed to the eccentric ring 12 with a screw 12b.

B) As a means for supplying the lubricating oil (grease) to the bearing 11, as shown in FIG.
A through hole 12c that connects the outer circumference of 2 and the bearing 11 is formed in a part of the eccentric ring 12, and the through hole 12 provided on the outer circumference of the eccentric ring 12
A grease nipple 12d is attached to the end of c.
When lubricating oil is supplied by applying an oil supply device (not shown) to the tip of the grease nipple 12c, the bearing 11 is passed through the through hole 12c.
Can be refueled. Further, normally, the action of the grease nipple 12c prevents the lubricating oil in the through hole 12c from leaking to the outside.

C) A stopper 15 is attached at one position on the circumference of the eccentric ring 12 by using a bolt 15a as shown in FIG. 3 (C). This stopper 15 on the eccentric wheel 12 is a stopper 1 fixed on the machine frame 9.
6 (see FIG. 2A), the rotation range of the eccentric wheel 12 is limited to about 180 °. The change of the contact position between the steel plate P and the plate contact member 10 (ring 13) (or the change of the above-mentioned interval d) can be sufficiently performed by rotating the eccentric ring 12 within a maximum range of 180 °, It does not make sense to rotate to a larger angle range. Therefore, the rotation range of the eccentric wheel 12 is limited by using the stopper 15 or the like for the convenience of the operator's operation.

An example of a shearing machine for metal plates has been introduced above, but it goes without saying that the shearing machine according to the present invention can be implemented in other modes. For example,
B) In some cases, it may be preferable to properly position the plate contact member on the side of the upper blade 3 in the illustrated example. The cut piece P1 separated from the trim edge P2 has high rigidity when it is wide, and therefore hardly bends when cutting, but when the width is narrow, it tends to bend and curl like the trim edge P2. Is. The plate contact member on the side of the upper blade 3 is preferably provided, for example, on the outer peripheral portion of the holder 8 in FIG.

(B) The plate contact member capable of changing the contact position with the metal plate is not limited to the illustrated example including the eccentric ring 12, but may be configured as follows. That is, an assembly-type annular body that can be easily replaced by dividing the rotary shaft 4 is used.
(Or 7, etc.), the outer peripheral portion of the annular body can be used as a plate contact member. Alternatively, a similar plate contact member can be configured by attaching a mandrel-type outer diameter expansion / contraction mechanism used in a strip-shaped steel plate winder or the like around the same rotary shaft.

C) The arrangement of the rotary blades and the purpose of shearing by the arrangement are not limited to the above examples. The arrangement of the rotary blades does not matter because the plate contacting member can exhibit the same function even in a shearing machine in which the rotary blades are arranged horizontally or diagonally in pairs instead of vertically. Also, regardless of the purpose of shearing, even in a shearing machine that cuts and aligns a metal plate to a predetermined width dimension like a slitter instead of a side trimmer, when the width of the cut metal plate is narrow, The same effect as the contact member
This is because it brings an effect.

[0041]

According to the shearing machine of the first aspect, even if the metal plate is easily pushed and bent by the rotary blade at the time of cutting, the bending is corrected by the action of the plate contact member to a predetermined direction. It will be sent smoothly. Therefore, the cut pieces are smoothly sent in a preferred direction for production of products or reuse of scraps, which improves production efficiency and reduces the burden on workers.

According to the shearing machine described in claim 2,
Even if the size or arrangement of the rotary blade or the specifications of the metal plate are changed, the size or arrangement of the plate contact member can be changed accordingly, so that the contact position between the metal plate and the plate contact member can be changed. Can always be appropriately set. As a result, it is possible to always and smoothly feed the cut pieces of the metal plate in a predetermined direction, including the case where the conditions for cutting have changed.

Particularly in the shearing machine according to claim 3,
There is an advantage that the structure of the plate contact member can be simplified and the plate contact member can be composed of a small number of parts.

In the shearing machine according to the fourth aspect, the size or arrangement of the plate contact member can be changed by a simple operation of enlarging or reducing the outer diameter of the annular body. for that reason,
Even when the rotary blade or the metal plate is changed, the contact position between the metal plate and the plate contact member can be appropriately and easily determined, and the cut piece can be smoothly fed in the predetermined direction.

In the shearing machine according to the fifth aspect, the size or arrangement of the plate contact member can be easily changed by adjusting the absolute rotation angle of the eccentric annular body. Therefore, also in this shearing machine, the contact position between the metal plate and the plate contact member can always be appropriately and easily determined, and the cut piece can be smoothly fed in a predetermined direction.

According to the shearing machine of the sixth aspect, in the shearing machine of the fifth aspect, there is no inconvenience that the wear is significantly advanced only in a specific portion of the plate contact member.

According to the shearing machine of claim 7, in particular, in the shearing machine of claim 5 or 6, a) the worker can easily adjust the angle of the eccentric annular body by remote operation through the operating means. (B) The eccentric annular body can be easily rotated by the deceleration action of the worm reducer to adjust the angle. (C) The reverse rotation prevention action of the worm reducer allows adjustment without using any special fixing means such as a brake. There is an effect that the angle of the eccentric annular body can be maintained unchanged.

[Brief description of drawings]

FIG. 1 is a schematic view showing an outline of a shearing machine 1 for a metal plate as one mode for carrying out the invention. 1A is a side view, and FIG. 1B is a sectional view taken along the line bb in FIG.

2 is an overall layout view of the shearing machine 1 of FIG. 1 and peripheral devices, FIG. 2 (a) is a front view, and FIG. 2 (b) is a view taken along the line bb in FIG. 2 (a). is there.

3 (A), (B), and (C) are detailed views of section A / B and section CC in FIG.

[Explanation of symbols] 1 shearing machine 2 Lower blade (rotary blade) 3 Upper blade (rotary blade) 4.7 Rotation axis 5 annular spacer 10 Plate support member 11 bearings 12 Eccentric ring (eccentric ring) 13 ring 14 gears 20 Operation handle 30 worm reducer 40 processor 41 Guide

Continued front page    (72) Inventor Kazuhiro Matsumoto             1-66, Funamachi, Taisho-ku, Osaka City Stock Association             Inside Nakayama Steel Works (72) Inventor Hiroshi Takano             1-66, Funamachi, Taisho-ku, Osaka City Stock Association             Inside Nakayama Steel Works (72) Inventor Takeshi Fujioka             3-4-21 Shinmachi, Nishi-ku, Osaka City Co., Ltd.             Inside the set (72) Inventor Masanori Takahashi             3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo             No. Kawasaki Heavy Industries, Ltd.Kobe factory (72) Inventor Kenji Kumai             3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo             No. Kawasaki Heavy Industries, Ltd.Kobe factory (72) Inventor Shinji Takaoka             3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo             No. Kawasaki Heavy Industries, Ltd.Kobe factory F-term (reference) 3C039 CB23                 3C051 EE02 EE11 EE33

Claims (7)

[Claims] 1. A shearing machine for cutting a metal plate with a pair of rotary blades arranged in a pair, wherein a plate contacting member that comes into contact with the cut metal plate is bent at the time of cutting, A shearing machine characterized by being placed in a position that can be corrected by force. 2. The shearing machine according to claim 1, wherein the size or arrangement of the plate contact member can be changed according to the size / arrangement of the rotary blade or the specifications of the metal plate. 3. An annular spacer for adjusting the axial position of the rotary blade is fitted on the rotary shaft of the rotary blade, and the outer peripheral portion of the spacer is used as a plate contact member. The shearing machine according to 2. 4. An annular body whose outer diameter can be enlarged / reduced is fitted on the rotary shaft of the rotary blade, and the outer peripheral portion of the annular body is used as a plate contact member. The shearing machine according to any one of 1. 5. An eccentric annular body whose center axes of inner and outer circumferences are not coincident with each other is fitted on the rotary shaft of the rotary blade so as to be rotatable relative to the rotary shaft and capable of adjusting and fixing an absolute rotation angle. The shearing machine according to any one of claims 1 to 3, wherein the outer peripheral portion of the eccentric annular body is a plate contact member. 6. The shearing process according to claim 5, wherein a ring is fitted on the outer periphery of the eccentric annular body so as to be rotatable relative to the eccentric annular body, and the ring is used as a plate contact member. Machine. 7. The shearing machine according to claim 5, wherein a worm speed reducer is connected between the eccentric annular body and the operating means for adjusting the absolute rotation angle thereof.