JPH08323530A - Metal plate cutting device - Google Patents

Abstract

PURPOSE: To prevent thermal change of the edge fitting area as well as to prevent abrasion of the edge and to dispense with the adjusting work of the clearance between the two edges adapted to the thickness of the metal plate to be cut by minimizing friction of both edges of a metal plate cutting device at the time of shearing extremely thin metal plates. CONSTITUTION: With regard to a metal plate cutting device for cutting relatively thin metal plates in a straight line by shearing them with an upper edge and a lower edge, a round edge 10 is composed to come in contact with a fixed straight edge 11 in a slightly slanted state with the round edge 10, which runs in the cutting direction as rotating, as the upper edge and the fixed straight edge 11, which extends straight in the cutting direction, as the lower edge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal plate cutting apparatus for linearly cutting a relatively thin metal plate having a certain length by shearing by an upper blade and a lower blade.

[0002]

2. Description of the Related Art In order to linearly cut a thin iron plate having a certain length, such as a galvanized iron plate used for building materials, an upper blade that is arranged in an offset state like a double blade of scissors and meshes in parallel with each other. A cutting machine called so-called shirring, which sandwiches a thin plate with a lower blade and shears it, is used.As such a metal plate cutting machine, shearing is performed by cutting a metal plate with scissors by a fixed straight blade and a vertically moving straight blade. Generally known are guillotine shears and rotary shears that shear a metal plate fed by a feed roller or the like to two rotating round blades that are arranged so as to mesh slightly in parallel in an offset state. .

Although not conventionally used for cutting a thin iron plate such as a galvanized iron plate, as a device for cutting a thin plate material such as a cord cloth, the lower blade is a fixed straight blade, and while rotating, it is fixed straight. It is also known that a thin blade material is sheared by using a round blade that runs along the blade as an upper blade.
(See Japanese Examined Patent Publication No. 42-6637)

[0004]

By the way, in the above-mentioned conventional metal plate cutting apparatus by shearing, in order to prevent burrs from being generated on the sheared surface of the metal plate, the offset is adjusted according to the thickness of the metal plate. The gap between the parallel meshing of the upper and lower blades is set to be as small as possible, and the ultra-thin iron plate (0.3-1
mm), the side surfaces of the upper and lower blades are almost in surface contact with each other and rub against each other.

Therefore, when a large number of ultra-thin iron plates are continuously cut by such a metal plate cutting device, the blades are abraded due to the friction caused by the rubbing of the two blades. Due to the frictional heat caused by
Deterioration of the portion is promoted.

On the other hand, an iron plate (1.2-
When cutting 3.2 mm), it is necessary to set the meshing gap between the two blades to be larger than that for the ultra-thin iron plate, so when cutting metal plates of different thickness with the same cutting device, According to the thickness of the metal plate
It is necessary to adjust the clearance of both blades each time.

The present invention is intended to eliminate the above-mentioned inconveniences of the conventional metal plate cutting apparatus, and more specifically, to the double-edged blade when shearing an ultrathin metal plate. By minimizing friction, it is possible to prevent blade abrasion, prevent thermal changes in the blade attachment part, and eliminate the need to adjust the clearance between the blades according to the thickness of the metal plate to be cut. An object of the present invention is to provide a metal plate cutting device capable of performing the above.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems and to achieve the object, the present invention uses a relatively thin metal plate with an upper blade and a lower blade as described in claim 1 above. In a metal plate cutting device for cutting linearly by shearing, the round blade that runs in the cutting direction while rotating is the upper blade, and the fixed straight blade that linearly extends in the cutting direction is the lower blade. Is configured to come into contact with the fixed straight blade in a slightly inclined state.

Further, in the metal plate cutting device according to the above-mentioned claim 1, as described in the above-mentioned claim 2, the rotation speed and the traveling speed of the round blade are set to be substantially the same. It is characterized by.

Further, in the metal plate cutting device according to the first aspect, as described in the third aspect, the guide rail of the base plate and the rack for traveling drive are arranged in parallel with the fixed straight blade. A motor for driving the base plate is installed on the base plate which is guided by the guide rails, and the output shaft of the motor meshes with the gear fixed to the rotary shaft of the round blade. And a reversing gear that meshes with the traveling drive rack, and the rotary shaft of the round blade with the round blade fixed to one end and the gear meshing with the gear on the motor side fixed to the other end It is characterized in that it is axially supported by the base plate via a movable spherical bearing arranged near the blade and a fixed spherical bearing arranged near the gear.

[0011]

[Operation] With the above configuration, when the ultrathin metal plate is sheared, the contact between the round blade and the fixed straight blade can be brought into at least a line contact state, so that both blades are in surface contact and rubbed against each other. The friction due to the contact between the two blades is reduced as compared with the case of According to the configuration described in claim 2, the contact between the two blades becomes a point contact, and the contact friction between the both blades can be reduced more effectively.

Further, by inclining the round blade with respect to the fixed straight blade, the round blade and the fixed straight blade overlap on one side of the contact point between the round blade and the fixed straight blade, and on the other side. Since the blade separates from the fixed straight blade, the round blade is run with the side where the two blades overlap as the front without adjusting the clearance between the two blades.
~ 1 mm iron plate) can be sheared satisfactorily, and a relatively thick metal plate (iron plate with a thickness of about 1.2 to 3.2 mm) can be obtained by running the round blade with the side away from both blades as the front. Can be satisfactorily sheared.

Further, according to the structure described in claim 3, on the motor side, the reversing gear meshing with the traveling drive rack is fixed to the output shaft as the truck is driven by driving the motor. It will lead in the running direction than the round blade side that is in contact with the fixed straight blade, thereby
On the side of the movable spherical bearing on the trolley, the rotary shaft is slightly displaced in the opposite traveling direction, so that the front part of the traveling circular blade overlaps the fixed straight blade and the rear part separates from the fixed straight blade.
The round blade automatically tilts with respect to the fixed straight blade.

Therefore, when cutting the ultra-thin metal plate, whichever direction the round blade travels,
The round blade automatically tilts in the direction in which the ultra-thin metal plate is well sheared. Since the inclination of the round blade with respect to the fixed straight blade is about 0.1 to 1 °, it may interfere with the meshing state of the gears of the rotary shaft of the round blade and the output shaft of the motor. There is no such thing.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the metal plate cutting apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 shows the appearance of the entire metal plate cutting apparatus of this embodiment, which is a frame 2 serving as an outer shell of the cutting apparatus 1.
Has an elongated opening 3 for inserting a cut portion of the metal plate into the apparatus, and a receiving plate 4 for placing the metal plate to be cut is arranged along the opening 3. A take-out port 5 for taking out a portion of the metal plate cut off in the apparatus to the outside is opened below the receiving plate 4.

Inside the opening 3 and above the backing plate 4, FIG.
As shown in FIG. 4, the metal plate pressing member 7 held by the guide portion 6 fixed to the frame 2 so as to be slidable up and down can be arbitrarily moved up and down along the guide portion 6 by an operating means (not shown). The metal plate pressing member 7 has a plate pressing rubber 7a attached to the lower end thereof and should be cut while the metal plate pressing member 7 is moved downward along the guide portion 6. The metal plate 8 is fixed to the receiving plate 4 by pressing it with the plate pressing rubber 7a.

FIG. 3 shows an arrangement state of the upper blade and the lower blade for shearing the metal plate in the metal plate cutting apparatus 1. In the frame 2, the round blade 10 is rotated by the rotation of the motor 12 to rotate the rotary shaft. While rotating around 13 as an axis, the motor 1
2, the upper blade 17 is indirectly supported by an upper column 17 fixed above the frame 2 so as to travel integrally with the rotary shaft 13, the gears 14, 16 and the like, and is arranged as an upper blade.

A fixed straight blade 11 that extends linearly in the cutting direction of the metal plate inside the window 3 is indirectly fixed to the frame 2 as a lower blade that cooperates with the round blade 10. It is located in.

That is, as shown in FIG. 4, two guide rails 18 extending along the upper column 17 are integrally fixed to the lower surface of the upper column 17, and the upper column 17
One traveling drive rack 19 extending along the upper column 17 is integrally fixed to a side surface of the guide rail 18, and a base plate 20 is provided on the guide rail 18 and a rail engaging member provided on the upper surface thereof. It is supported by the guide rail 18 via 21 so as to be slidable.

A motor 12 for driving the device is fixed to the base plate 20 by bolts 22 on the upper surface of a portion extending outward from the lower position of the upper column 17, and the motor 12 for driving the device is positioned below the upper column 17. On the lower surface of the part to be
Rotating shaft 1 with a round blade 10 fixed to the end portion 2)
3 is pivotally supported by bearings 23 and 24.

The output shaft 12a of the motor 12 extends toward the upper column 17, and on the output shaft 12a, a fixed gear 14 for rotating a circular blade and a reversing gear 15 for traveling drive are provided. The outer diameters of the gear 14 and the reversing gear 15 are set to be substantially the same.

The rotary blade 13 of the round blade 10 has the round blade 10 fixed to the end farther from the motor 12 and the fixed gear 16 provided at the end closer to the motor 12. The outer diameters of 16 and the round blade 10 are set to be substantially the same.

The reversing gear 15 provided on the output shaft 12a of the motor 12 meshes with a traveling drive rack 19 fixed to the side surface of the upper column 17, and the gear 14 is attached to the base plate 20. The portion of the window portion 27 that penetrates meshes with the gear 16 provided at the end of the rotary shaft 13.

With the above structure, the motor 12
When the output shaft 12a of the gear rotates, the gear 14
The rotation shaft 13 is rotated by the meshing of the gear 16 and the gear 16 and the round blade 1
At the same time that 0 rotates, the reversing gear 15 moves in mesh with the rack 19 and moves together with the reversing gear 15.
2, the base plate 20 travels while being guided by the guide rails 17, and as a result, the round blade 10 pivotally supported by the base plate 20 is
It will run along the upper column 17.

Further, the upper surface of the receiving plate 4 and the fixed straight blade 11 is a surface of the lower column 30 which is disposed obliquely below the upper column 17 and parallel to the upper column 17 and which is fixed below the frame 2. The support plate 4 is provided on the upper surface of the lower column 30, and the fixed straight blade 11 is provided on the upper portion of the side surface of the lower column 30 so as to form one.
However, each is fixed.

The round blade 1 installed as described above
As shown in FIG. 4, the 0 and the fixed straight blades 11 are arranged in parallel with each other so as to be offset and slightly overlap each other in the vertical direction when viewed from the cutting direction, and overlap in the vertical direction. The meshing parts appear to be in contact with each other in the drawing, but when the device is not in operation, a slight gap is created.

As described above, the round blade 10 that runs while rotating on its own is disposed as the upper blade, and the fixed straight blade 11 is disposed as the lower blade that cooperates with the upper blade. In the bearings 23 and 24 fixed to the base plate 20 for pivotally supporting the rotary shaft 13 of the round blade 10, the rotary shaft 13 is axially oriented as shown in FIGS. 7 to 9. It is a spherical bearing that pivotally supports with respect to. (Note that FIG.
9 shows the bearing portion 23. )

As shown in FIG. 6, these bearing portions 23 and 24 are arranged such that the bearing portion 24 arranged closer to the gear 16 is attached to the base plate 20 by an ordinary bolt hole provided in the bearing portion 24. While being fixed in an immovable state, the bearing portion 23 arranged near the round blade 10 is movable in the range of the elongated hole 23a with respect to the base plate 20 by the elongated hole 23a provided in the bearing portion 23. It is fixed in the state.

To fix the bearing portion 23 to the base plate 20, as shown in FIG. 7, after the bolt 29 protruding from the base plate 20 is passed through the elongated hole 21a, the double nut 25 is attached to the bolt 29. It is fixed by screwing, and double nut 2
In the state where 5 is loosened, the bearing portion 23 is movable with respect to the base plate 20 within the range of the long hole 23a, and when the double nut 25 is tightened, the bearing portion 23 is immovable with respect to the base plate 20.

In the metal plate cutting apparatus of the present embodiment having the above-described structure, the metal plate to be cut has the cut-off portion inserted into the apparatus through the opening 3 of the frame 2 and the receiving plate 4 is inserted. The fixed straight blade 1 is rotated while the round blade 10 is rotating by rotating the motor 12 after the metal plate pressing member 7 is lowered to fix the metal plate on the receiving plate 4.
1, the metal plate sandwiched between the round blade 10 and the fixed straight blade 11 is sheared along the fixed straight blade 11.

At that time, the base plate 2 by the rotation of the motor 12
The reversing gear 15 that meshes with the rack 19 as the vehicle travels 0
The motor 12 with the output shaft 12a fixed has a round blade 1
Since it is ahead of 0 in the traveling direction, the bearing portion 2
When the double nut 25 of No. 3 is loosened, as shown in FIG.
0 or the bearing portion 2 on the base plate 20 as shown in FIG.
On the side of 3, the rotary shaft 12 is slightly deviated in the direction opposite to the traveling direction. As a result, the front portion of the traveling circular blade 10 overlaps the blade portion 11a of the fixed straight blade 11, and the rear portion thereof is fixed straight blade 11. The circular blade 10 slightly inclines with respect to the direction in which the blade portion 11a of the fixed straight blade 11 extends so as to be separated from the blade portion 11a.

Although the inclination of the round blade 10 with respect to the fixed straight blade 11 is exaggerated in the drawings for the sake of explanation, it is actually about 0.1 to 1 °. There is no problem in the meshing state of the gears 14, 16 of the rotary shaft 13 of the motor 10 and the output shaft 12a of the motor 12.

In this embodiment, the fixed gear 14 for rotating the circular blade and the reversing gear 15 for driving the traveling have substantially the same outer diameter, and the gear 16 of the rotary shaft 13 and the outer diameter of the round blade 10 have the same outer diameter. The rotation speed and the traveling speed of the round blade 10 are substantially the same because they are substantially the same.

According to the metal plate cutting apparatus of this embodiment as described above, the metal plate is sheared while the round blade 10 is inclined with respect to the fixed straight blade 11, so that the round blade 10 is cut. Since the rotation speed and the traveling speed are almost the same, the round blade 10 and the fixed straight blade 11 are in contact with each other at one point without sliding contact, and the metal plate is sandwiched and sheared between them. Compared with the case where the upper and lower blades are in surface contact with each other and rubbed against each other, the contact friction between the blades 10 and 11 can be remarkably reduced, and wear of each blade and thermal change of the blade mounting portion due to frictional heat can be prevented. You can

Further, in the metal plate cutting apparatus of this embodiment,
By keeping the double nut 25 for fixing the bearing portion 23 of the rotary shaft 13 loose, as the round blade 10 travels together with the base plate 20 by the rotation of the motor 12,
The round blade 10 automatically tilts with respect to the fixed straight blade 11 such that the front portion of the round blade 10 overlaps the blade portion 11a of the fixed straight blade 11 and the rear portion thereof separates from the fixed straight blade 11.

Therefore, an extremely thin metal plate (for example, a thickness of 0.
When shearing an iron plate of about 3 to 1 mm), the circular blade 10
The round blade 10 automatically tilts in a direction suitable for shearing the ultra-thin metal plate, regardless of whether the traveling direction of the ultra-thin metal plate is always reciprocating. Since good shearing is possible, many ultra-thin metal plates can be efficiently cut in the same sheared state.

On the other hand, the double nut 25 for fixing the bearing 23 of the rotary shaft 13 is tightened to fix the round blade 10 to the straight blade 11.
By fixing in a state in which the blades 10 and 11 overlap with each other, the ultra-thin metal plate can be satisfactorily sheared by running the round blade 10 with the side where the blades 10 and 11 overlap as the front. By running the round blade 10 with the side where the two blades 10 and 11 are away from each other as the front, a relatively thick metal plate (for example, an iron plate having a thickness of about 1.2 to 3.2 mm) can be sheared well. .

Therefore, when both the ultra-thin metal plate and the relatively thick metal plate are cut by the same cutting device 1, the clearance between the two blades 10 and 11 is not adjusted each time, and both are good. It becomes possible to perform shearing.

In this embodiment, in order to make the effect of reducing the contact friction between the round blade 10 and the fixed straight blade 11 particularly remarkable, the rotation speed and the running speed of the round blade 10 are set to be substantially the same. However, if it is desired to change such settings, each gear 1 provided on the output shaft 12a of the motor 12 may be changed.
By replacing the gears 4, 15 and the gear 16 provided on the rotary shaft 13 with those having different outer diameters, it is possible to appropriately change the relationship between the rotation speed and the traveling speed of the round blade 10.

[0041]

According to the metal plate cutting apparatus of the present invention as described above, it is possible to minimize the friction between the two blades when shearing an ultrathin metal plate, and to prevent the abrasion of the blades due to the friction between the two blades. It is possible to prevent deterioration due to heat change of the blade mounting part due to frictional heat, and when cutting metal plates of different thickness with the same device, clearance between both blades according to the thickness of the metal plate to be cut The adjustment work of can be eliminated.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of an embodiment of a metal plate cutting apparatus of the present invention.

FIG. 2 is a partial front view showing an arrangement state of a metal plate pressing member in the embodiment shown in FIG.

FIG. 3 is a perspective view showing an arrangement state of upper blades (round blades) and lower blades (fixed straight blades) in the embodiment shown in FIG.

FIG. 4 is a partial cross-sectional side view of the main part of the embodiment shown in FIG. 1 viewed from the cutting direction.

5 is a top view of a base plate on which the upper blade (round blade) according to the embodiment shown in FIG. 1 is mounted.

FIG. 6 is a bottom view of the base plate on which the upper blade (round blade) according to the embodiment shown in FIG. 1 is mounted.

7 is a front view showing the bearing itself movably fixed to the lower surface of the base plate shown in FIG.

8 is a partial cross-sectional plan view of the bearing portion itself shown in FIG.

9 is a partial cross-sectional plan view showing a state when the rotary shaft in the bearing portion shown in FIG. 8 is swung.

10 is an explanatory plan view showing a traveling direction and a state of inclination of a round blade during traveling of the base plate in the embodiment shown in FIG.

11 is an explanatory plan view showing a state in which the round blade is tilted when the base plate travels in a direction opposite to the traveling direction shown in FIG.

[Explanation of symbols]

 1 Metal Plate Cutting Device 10 Round Blade 11 Fixed Straight Blade 12 Motor 12a Motor Output Shaft 13 Rotating Shaft 14 Gear 15 Reverse Gear 16 Gear 18 Guide Rail 19 Travel Drive Rack 20 Base Plate 23 Bearing Part (Movable Spherical Bearing) 24 Bearing Part (fixed spherical bearing)

Claims (3)

[Claims] 1. A metal plate cutting device for linearly cutting a relatively thin metal plate by shearing by an upper blade and a lower blade, wherein a round blade that runs in the cutting direction while rotating is the upper blade, A metal plate cutting device, wherein a fixed straight blade extending linearly is a lower blade, and a round blade is configured to contact the fixed straight blade in a slightly inclined state. 2. The metal plate cutting device according to claim 1, wherein the rotation speed and the traveling speed of the round blade are set to be substantially the same. 3. A guide rail of a base plate and a rack for traveling drive are arranged in parallel with the fixed straight blade, and a motor for traveling drive of the base plate is provided on the base plate which is guided and guided by the guide rail. Installed on the output shaft of the motor, there are provided a gear that meshes with a gear fixed to the rotary shaft of the round blade, and a reversing gear that meshes with the traveling drive rack. The rotary shaft of the round blade with the fixed gear and the gear that meshes with the gear on the motor side is fixed to the other end through the movable spherical bearing arranged near the round blade and the fixed spherical bearing arranged near the gear. The metal plate cutting device according to claim 1, wherein the metal plate cutting device is axially supported by the plate.