JPH10193215A - Metal plate cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing part in an upper panel itself fixing an upper blade, prevent weight thereof from increasing, surely suppress an escape in the direction orthogonal to the cutting direction in an intermediate part of the upper panel, so that a long-scaled metal thin plate can be well cut, in a metal plate cutter cutting the metal plate by the lowering down upper blade and a fixed lower blade. SOLUTION: This device is constituted such that relating to a lower panel 3 integrally fixing a lower blade 2 along the lengthwise direction to be fixedly provided in a horizontal condition by a supporting frame 1, a vertical plate-shaped upper panel 6 integrally fixing an upper blade 5 opposed to the lower blade 2 in a lower end part is vertically moved through a turn shaft 9 turned by drive force 16 and link mechanisms 11a, 12a, 11b, 12b converting turning of the turn shaft 9 into vertical movement. Here, so as to be along a vertical plate surface of the upper panel 6, a support fixed member 4 is fixedly provided in a horizontal condition by the supporting frame 1, also over the support fixed member 4 and the upper panel 6, a lengthwise direction suitable part thereof, a guide holding mechanism 7 is provided, which is for holding the upper panel 6 capable of vertically moving and in parallel relating to the support fixed member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal sheet cutting apparatus, and more particularly to a metal sheet cutting apparatus suitable for cutting a long metal sheet.

[0002]

2. Description of the Related Art In a metal plate cutting device called a shearing device, a lower blade extending along a cutting direction of a metal plate is integrally formed with a pair of supporting frames which are erected at intervals on an installation surface thereof. The fixed lower frame is fixed horizontally to each support frame at both ends in the longitudinal direction, and is fixed horizontally, and the drive frame is supported at both ends by the support frame. A vertical plate-shaped upper plate in which an upper blade facing the lower blade is integrally fixed to a lower end portion via a rotation shaft and a link mechanism that converts the rotation of the rotation shaft into vertical movement, 2. Description of the Related Art There is conventionally known a structure in which a spring mechanism is urged upward by a spring mechanism and is supported so as to be vertically movable with respect to a supporting frame near both ends in a longitudinal direction thereof.

According to such a conventional metal plate cutting apparatus, in a steady state, the upper plate is held above the lower plate by a predetermined distance by a spring mechanism. By rotating the rotating shaft, the force transmitted from the rotating shaft via the link mechanism is used to lower the upper plate against the supporting force of the spring mechanism, thereby mounting on the lower plate. The metal plate is cut between the lower blade of the lower plate and the upper blade of the upper plate.

[0004]

In the above-described conventional metal plate cutting apparatus, the upper plate formed to a predetermined length in accordance with the cutting length of the metal plate is connected to a rotating shaft and a link. Through the mechanism, since it is supported on the supporting frame only near the both ends in the longitudinal direction, the supporting strength at the middle part of the upper plate is low, so when cutting the metal plate, The middle part in the longitudinal direction escapes in the direction perpendicular to the cutting direction of the metal plate, and an undesired gap is formed between the lower blade and the upper blade at that portion, such a tendency is that the metal plate to be cut is long and thin. It becomes more and more remarkable.

Therefore, in order to minimize the escape of the upper plate, the lower end portion of the upper plate is reinforced so as to protrude largely in the width direction (the direction orthogonal to the longitudinal direction of the upper plate) at the middle portion in the longitudinal direction. However, by forming such a reinforcing part integrally with the upper panel, the longer the metal plate to be cut and the longer the apparatus, the greater the weight of the upper panel itself, the larger the entire apparatus. Not only does it become heavier, but also a large driving force is required to move the upper panel up and down.

Even in such a case, in a metal plate cutting apparatus that cuts a long and thin metal plate along the longitudinal direction, escape at an intermediate portion of the upper plate cannot be completely avoided. Since the driving force is difficult to be transmitted to the middle part of the upper plate, in practice, the thickness of the cuttable metal plate is limited to about 0.4 mm. When trying to cut, the metal sheet cannot be cut at the middle part of the upper plate due to the above-mentioned escape, and the thin metal plate is wound between the lower blade and the upper blade so as to be bent.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a metal plate cutting device, in which a reinforcing portion is provided on an upper plate itself to increase the weight of the upper plate without increasing the weight. It is an object of the present invention to reliably suppress the escape as described above and to cut a long metal sheet satisfactorily.

[0008]

According to the present invention, in order to solve the above-mentioned problems, a lower blade is integrally fixed along a longitudinal direction as described in claim 1 above, and , For the lower panel fixed horizontally by the supporting frame,
A vertical plate-shaped upper plate in which an upper blade facing the lower blade is integrally fixed to a lower end portion has a rotating shaft that is rotated by a driving force, and a link that converts the rotation of the rotating shaft into a vertical motion. Through the mechanism
In the metal plate cutting device arranged to move up and down, along with the vertical plate surface of the upper plate, a support fixing member is fixed horizontally by a support frame, and the support fixing member and A guide holding mechanism for holding the upper plate vertically movable with respect to the supporting and fixing member so as to be held in parallel with the supporting and fixing member is provided at an appropriate position in the longitudinal direction of the upper plate. .

Further, in the metal plate cutting apparatus according to the first aspect, as described in the second aspect, the supporting frame includes a lower plate and a supporting and fixing member which are respectively provided at both ends in the longitudinal direction. A pair of frames that are fixedly supported, and both ends of the rotating shaft are rotatably supported via bearing portions with respect to the pair of supporting frames, respectively. , And link mechanisms for converting the rotation of the rotation shaft into vertical movement and transmitting the same to the upper panel are provided.

[0010] In the metal plate cutting device according to the second aspect, at least one intermediate bearing portion is provided at an intermediate portion of the supporting and fixing member, as described in the third aspect. The intermediate portion of the rotation shaft is rotatably supported by the bearing portion.

Further, in the metal plate cutting device according to the third aspect, as described in the fourth aspect, the rotation of the rotation shaft is converted into vertical movement near the intermediate bearing portion. A link mechanism for transmitting to the upper panel is provided.

Further, in the metal plate cutting device according to the second to fourth aspects, as described in the fifth aspect, the intermediate portion of the supporting and fixing member is provided with a predetermined interval in the longitudinal direction, A plurality of guide holding mechanisms are provided.

Further, in the metal plate cutting device according to the second to fifth aspects, as described in the sixth aspect, the rotating shaft is rotated with respect to one of the pair of supporting frames. , And a transmission mechanism for transmitting the rotation of the motor to the rotating shaft are provided.

[0014]

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

FIG. 1 is a perspective view showing a left half of an embodiment of a metal plate cutting apparatus according to the present invention, and FIG.
FIG. 2 is a front view showing the entire metal plate cutting device shown in FIG. 1, in each of which a configuration of a plate holding member for holding a metal plate to be cut is omitted. FIG. 3 shows a right end portion of the metal plate cutting device shown in FIG.
It is a partial cross-sectional side view including a plate holding member.

In the metal plate cutting apparatus of the present embodiment, a rectangular cylinder in which a lower blade 2 is integrally fixed to a pair of plate-like supporting frames 1a, 1b opposed to each other at a predetermined distance. Lower plate 3 and fixed support member 4 in the form of a rectangular tube, both ends of which in the longitudinal direction are supported by respective support frames 1a,
By being integrally fixed to the opposing surfaces of the supporting frames 1b, the supporting frames 1a and 1b are horizontally fixed between the supporting frames 1a and 1b.

A vertical plate-shaped upper plate 6 integrally fixed with an upper blade 5 facing the lower blade 2 is held by a guide holding mechanism 7 so as to be vertically movable with respect to the front surface of the fixed support member 4. A rotating shaft 9 for supporting the upper panel 6 via a link mechanism is disposed in each of the bearing portions 8a and 8b fixed at its longitudinal ends to the supporting frames. Each supporting frame 1a, 1
b, it is supported rotatably in a horizontal state.

The lower platen 3 and the fixed support member 4 fixed between the pair of plate frames 1a and 1b, and the upper platen 6 supported by the rotating shaft 9 via a link mechanism are all cut. The lower platen 3 has a predetermined length corresponding to the length of the metal plate, and the lower platen 3 serves as a mount on which the metal plate is placed at the time of cutting, and has a height suitable for the work of placing the metal plate. The lower blade 2 is integrally fixed to the upper end of the side surface so as to extend along the longitudinal direction of the lower platen 3.

The fixed support member 4 is disposed rearward above the lower platen 3 and has a certain degree of rigidity. In the present embodiment, the fixed support member 4 has a middle portion in the longitudinal direction. A guide holding mechanism 7 for holding the upper plate 6 so as to be able to move up and down is provided at four places on the front surface, and an intermediate bearing portion 10 is fixed at two places on the front side of the upper surface. The intermediate portion in the longitudinal direction of the rotating shaft 9 is rotatably supported by the intermediate bearing portion 10.

The vertical plate-shaped upper plate 6 has an upper blade 5 opposed to the lower blade 2 integrally fixed to the lower end thereof. As shown in FIG. 2, the lower blade 3 is arranged to be offset from the lower blade 2 and, in the vertical direction, as shown in FIG. Are arranged so as to have a predetermined inclination angle in the longitudinal direction with respect to the lower plate 3 (lower blade 2).

In the present embodiment, the upper plate 6 is vertically movably held on the front surface of the fixed support member 4 via each guide holding mechanism 7, and is rotatable with respect to the rotating shaft 9. Link mechanisms 11a, 12a installed near both ends of dynamic shaft 9
And link mechanisms 11b and 12b installed near the intermediate bearing portion 10 at intermediate portions (two locations in this embodiment) of the rotation shaft 9 in the longitudinal direction. Are connected via

Each of the link mechanisms connecting the rotating shaft 9 and the upper panel 6 has a lever 11a, 11a fixed to the rotating shaft 9.
b, 11c and a link 12 connecting the lever to the upper plate 6.
a, 12b, and 12c, and a link mechanism 11 provided near the longitudinal ends of the rotating shaft 9 therein.
a, 12a and link mechanisms 11c, 12c, the upper panel 6 is connected to one end of each of the levers 11a, 11bc fixed to the rotating shaft 9, and the motor 16 is connected to the other end of the lever 11a. A link 13 for transmitting the rotational force is connected to the other end of 11bc, and a rod 24 of a spring mechanism 28 is connected to the link 13 for transmitting the torque.

That is, as shown in FIG. 1, a motor 16 serving as a drive source for rotating the rotating shaft 9 and the rotation of the motor 16 are fixed to the rotating shaft 9 on one supporting frame 1a. Transmission mechanism 1 for transmitting to transmitted lever 11a
In order to transmit the rotation of the motor 16 to the rotating shaft 9, one end of a link 13 is connected to the other end of the lever 11 a fixed to the rotating shaft 9, The other end of the link 13 is connected to an eccentric position of a gear 14 rotatably supported by a bearing on the support frame 1 a, and the gear 14 meshes with a gear 15 attached to a rotation shaft of a motor 16. I have.

Thus, when the motor 16 is rotated,
The gear 14 rotates in conjunction therewith, and the lever 11a swings via the link 13 in conjunction therewith,
When the lever 11a rotates counterclockwise in FIG. 1, the upper plate 6 is lowered via the link 12a.
When 1a rotates clockwise, the upper platen 6 is raised via the link 12a.

As shown in FIG. 3, the other supporting frame 1b has an upper plate holding spring mechanism 28 for holding the upper plate 6 above the lower blade 2 by a predetermined distance in a steady state.
In order to hold the upper panel 6 upward, a rod 2 is attached to the other end of the lever 11c fixed to the rotating shaft 9.
The rod 24 is inserted into a cylinder 25 rotatably attached to the support frame 1b by a shaft 25a, and is pushed out of the cylinder 25 by a spring 26 disposed in the cylinder 25. 3, whereby the lever 11c is urged to rotate counterclockwise in FIG.

The upper plate holding spring mechanism 28 constitutes a toggle mechanism having the pivot shaft 9 and the shaft 25a as fulcrums. The connecting mechanism between the rod 24 and the lever 11c and the fulcrum are in a straight line. Also, when the lever 11c slightly rotates in the counterclockwise direction in FIG. 3, a force for driving the upper plate 6 upward by the spring 26 acts.

Thus, in the steady state, the upper plate 6 is held above the lower blade 2 by a predetermined distance by the urging force of the spring 26 via the link 12c, and the metal plate is placed on the lower plate 3. The upper panel 6 is prevented from dropping during the placing operation.

Further, the metal plate cutting apparatus of the present embodiment includes:
Although not shown in FIGS. 1 and 2, as shown in FIG. 3, a plate holding mechanism 23 for firmly holding the metal plate at that position prior to cutting is provided.

The plate holding mechanism 23 moves the holding member 27 up and down by the rotation of the rotating shaft 9.
7, a roller 21 is attached to an upper end thereof, and a rubber 22 is attached to a lower end thereof.
7, the supporting frame 1 b is rotated by the rotating shaft 20 a.
A cam 20 rotatably supported with respect to is disposed.

The cam 20 is basically in the form of a disk centered on the rotation shaft 20a, but has a recess formed in a part thereof, and the roller 21 is fitted into the recess of the cam 20 by a spring (not shown). In the steady state, the position shown in FIG.
A gap for inserting a metal plate to be cut is formed between the rubber 22 at the lower end of the lower plate 7 and the lower platen 3.

As for the structure for lowering the holding member 27 with the rotation of the rotary shaft 9, the gear 17 is fixed to the rotary shaft 9 near the bearing 8b and the gear 17 is fixed.
A gear 19 is fixed to the rotation shaft 20a of the cam 20, and the gears 17, 19 are connected by a chain 18 or the like.

In the plate holding mechanism 23, the rotating shaft 9
The dimensional relationship between the components is adjusted so that the pressing member 27 descends and presses the metal plate placed on the lower platen 3 before turning to cut the metal plate between the upper blade 5 and the lower blade 2. Is set.

Thus, when the cam 20 is rotated via the gears 17 and 19 with the rotation of the rotation shaft 9, the upper plate 6 is rotated.
Roller 21 is pushed out of the concave portion of the cam 20 earlier than the lowering of the pressing member 27, and the pressing member 27 moves down, and
2 presses the metal plate placed on the lower plate 3.

By the way, in the metal cutting apparatus of the present embodiment having the above-described configuration, as described above, the guide holding mechanisms 7 are provided at four positions on the front surface of the fixed supporting member 4 at the longitudinal middle portion. Is provided, the upper plate 6 of the vertical plate shape,
It is vertically movably held by a guide holding mechanism 7 with respect to the front surface of the fixed support member 4.

FIG. 4 is an enlarged view of such a guide holding mechanism 7, and FIG. 5 is a sectional plan view of the guide holding mechanism 7 shown in FIG.

As shown in FIG. 2, the upper plate 6 arranged along the front surface of the fixed support member 4 extends vertically at a predetermined interval in the longitudinal direction as shown in FIG. An elliptical hole 6a is formed, and a guide portion 30 is disposed in the elliptical hole 6a so as to be movable in the vertical direction as shown in FIG. A sealing member 31 wider than the elliptical hole 6a is fixed to the front side surface of the guide portion 30 integrally welded and projecting forward from the elliptical hole 6a by a screw.

Then, a plate-shaped dry bearing 32 is fixed to the sliding portion of the fixed support member 4 with the upper plate 6 so that the sliding of the upper plate 6 can be maintained satisfactorily without refueling. The same dry bearing 33 is fixed to a sliding portion between the sealing member 31 and the upper platen 6.

In the present embodiment, a guide holding mechanism 7 is provided at a plurality of (four) locations on the front surface of the fixed support member 4 in the middle in the longitudinal direction, and the upper plate 6 extending in the longitudinal direction is provided. In order to hold each part with high accuracy, it is necessary to form the sliding part on the same vertical plane over each guide holding mechanism 7, but as described above, the dry bearing 3
In the case where the second bearing 2 is interposed, the mounting position of each dry bearing 32 on the fixed support member 4 may be cut out to improve accuracy, and then the dry bearing 32 may be fixed to each cut-out surface.

The operating state of the metal plate cutting apparatus of the present embodiment having the above-described configuration will be described below.

In the metal plate cutting apparatus, in a steady state, as shown in FIG. 3, the upper plate 6 is held a predetermined distance above the lower plate 3 by the urging force of the upper plate holding spring mechanism 28. The pressing member 27 disposed on the front side is held in a state where a gap for inserting a metal plate to be cut is formed between the rubber 22 at the lower end and the lower platen 3.

In this state, the metal plate to be cut is placed on the lower platen 3 to position the cutting position, and then the motor 16 mounted on one of the supporting frames 1a is turned on. The gear 14 rotates with the rotation of the rotation 16, and the lever 11 a rotates (in the counterclockwise direction in FIG. 1) via the link 13 in conjunction with the rotation of the gear 14, and the rotation shaft 9 rotates.

Then, the gears 17 and 19 are
By the rotation of the cam 20 through, the pressing member 27 descends in advance, presses the metal plate mounted on the lower platen 3 with the rubber 22 at the lower end thereof, and subsequently passes through each link mechanism. By the lowering of the upper platen 6, the upper blade 5 installed so as to have a predetermined inclination angle with respect to the lower blade 2 has a small gap from one end side of the lower blade 2 in the longitudinal direction to the other end side. Upper blade 5 descending so as to intersect sequentially and arranged offset
And the lower blade 2 cuts the metal plate.

At this time, the upper plate 6 to which the upper blade 5 is fixed is guided by a guide holding mechanism 7 arranged at an intermediate portion in the longitudinal direction.
Since the lower portion of the upper plate 6 does not escape in the direction orthogonal to the cutting direction of the metal plate at the middle portion in the longitudinal direction, the lower blade is lowered since the intermediate portion in the longitudinal direction descends while being positioned at the front surface of the fixed support member 4. Since an undesired gap is not formed between the upper blade 5 and the upper blade 5, the metal plate is cut well.

After the cutting of the metal plate, when the gear 14 further rotates with the rotation of the motor 16, the lever 11a rotates in the opposite direction (clockwise in FIG. 1) via the link 13 in conjunction with the rotation of the gear 14. Then, the rotating shaft 9 is rotated in the reverse direction, whereby the upper plate 6 is raised and returned to the original position via each link mechanism, and the cam 20 is moved to the original position via the gears 17 and 19. Then, the roller 21 is fitted into the concave portion of the cam 20 to form a gap between the rubber 22 at the lower end of the pressing member 27 and the lower platen 3 for inserting a metal plate.

According to the metal plate cutting apparatus of the present embodiment as described above, when the metal plate is cut, the intermediate portion in the longitudinal direction is guided by the guide holding mechanism 7 with respect to the front surface of the fixed support member 4.
The upper plate 6 descends in the state where it is positioned by
The upper plate 6 does not escape in the direction perpendicular to the metal plate cutting direction at the middle portion in the longitudinal direction to form an undesired gap between the lower blade 2 and the upper blade 5, and the metal plate is elongated. , Even if it is thin, good cutting can be performed.

That is, in the case of cutting a long metal plate of about 6 m, the thickness was limited to 1 mm, but in the case of a metal plate made of stainless steel or titanium, Can be satisfactorily cut even with a thickness of 5/100 mm.

Since it is not necessary to form a reinforcing portion integrally with the upper plate 6 unlike the conventional case, the upper plate 6 which is a movable portion is not provided.
Can be greatly reduced, and the fixed supporting member 4 which is a relatively heavy object can be supported by the supporting frames 1a, 1a.
b, and is not included in the drive system of the upper panel 6, so that a long metal plate can be cut without increasing the rotation driving force of the rotation shaft 9 so much. The structure of the drive system for operation and related parts can be simplified, and the overall weight can be reduced.

In the present embodiment, the intermediate bearing 10 is provided at the intermediate portion of the supporting and fixing member 4, thereby supporting the intermediate portion of the rotating shaft 9 at an appropriate interval in the longitudinal direction. Even if the metal plate to be cut becomes long and the distance between the supporting frames 1a and 1b increases, the bending of the rotating shaft 9 can be suppressed and the diameter thereof can be reduced.

In this embodiment, the link mechanisms 11b and 12b for converting the rotation of the rotation shaft 9 into a vertical movement and transmitting the rotation to the upper plate 6 are provided near the intermediate bearing portion 10.
The turning power of the rotating shaft 9 can be transmitted to the upper plate 6 evenly in the longitudinal direction.

Further, in the present embodiment, a pair of supporting members for supporting the lower platen 3 and the fixed supporting members 4 and the like are related to the simplification of the structure of the driving system and its related parts as described above. One of the frames 1a and 1b supports a drive system including the motor 16 and the gears 14, and the other 1b supports the plate holding mechanism 23 and the upper plate holding spring mechanism 28. Can be simplified.

Although the embodiment of the metal plate cutting apparatus according to the present invention has been described above, the present invention is not limited to the above-described embodiment. The number and position of the guide holding mechanisms 7 installed at predetermined intervals can be appropriately changed according to the size of the apparatus itself as long as they are installed at at least one place.

In the above embodiment, the guide holding mechanism 7 employs a configuration in which the guide portion 30 fixed to the fixed support member 4 is movably inserted into an elliptical hole 6a formed in the upper plate 6. However, for example, an elliptical hole may be formed in the fixed support member 4, and the guide portion 30 movably inserted into the elliptical hole may be fixed to the upper panel 6, or another structure may be employed. It is possible.

Further, an intermediate bearing 10 and a link mechanism 11b, 1 provided at an intermediate portion in the longitudinal direction of the fixed support member 4 are provided.
About 2b, the number, position, etc. can be changed suitably, and in some cases, it is also possible to omit it entirely.

Further, the drive system for rotating the rotating shaft 9 is not limited to the one using the electric motor 16, and for example, a handle protruding in the radial direction is connected to the rotating shaft 9. The operation can be performed by a manual drive system such as applying an operation force to the handle manually, and can also be performed by other driving means.

Further, the supporting frame 1 for supporting the lower platen 3 and the fixed supporting member 4 and the like also has a pair of plate-like supporting frames 1 as shown in the above embodiment.
The supporting frame 1 is not limited to a and 1b, and may be supported on the installation surface by a suitable supporting member at an intermediate portion in the longitudinal direction, such as the lower platen 3 and the fixed supporting member 4. The supporting frame 1 has various shapes and structures. It is possible to take.

[0056]

According to the metal plate cutting apparatus of the present invention as described above, the upper plate integrally fixed with the upper blade facing the lower blade is fixed at an appropriate position in the longitudinal direction by the supporting frame. In the state where it is positioned by the guide holding mechanism, it is vertically guided and held on the front surface of the support fixing member, so that the upper plate does not escape in the direction perpendicular to the cutting direction at the middle part thereof Even if the metal plate to be cut is long and thin, it can be cut well.

[Brief description of the drawings]

FIG. 1 is a perspective view partially showing one side (drive side) of a metal plate cutting device according to an embodiment of the present invention.

FIG. 2 is a front view showing the entire metal plate cutting device shown in FIG. 1;

FIG. 3 is a partially sectional side view showing the opposite side of the metal plate cutting device shown in FIG. 1;

FIG. 4 is a front view showing a guide holding mechanism of the metal plate cutting device shown in FIG. 1;

5 is a sectional plan view of the guide holding mechanism shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Supporting frame 1a Supporting frame (drive side) 1b Supporting frame (non-drive side) 2 Lower blade 3 Lower plate 4 Fixed support member 5 Upper blade 6 Upper plate 7 Guide and holding mechanism 8a Bearing 8b Bearing 10 Intermediate bearing Part 9 Rotating shaft 11a, 12a Link mechanism 11b, 12b Link mechanism 11c, 12c Link mechanism 13, 14, 15 Transmission mechanism 16 Motor (driving force)

Claims (6)

[Claims] 1. A lower blade integrally fixed along a longitudinal direction, and an upper blade opposed to the lower blade is integrally formed on a lower end portion of a lower plate fixed horizontally by a supporting frame. A vertical plate-shaped upper plate fixed to the upper plate is disposed so as to move up and down via a turning shaft turned by a driving force and a link mechanism for converting the turning of the turning shaft into a vertical movement. In the metal plate cutting device that is, along with the vertical plate surface of the upper plate, while the support fixing member is fixed horizontally by the support frame, across the support fixing member and the upper plate, A metal plate cutting device, wherein a guide holding mechanism for holding the upper plate vertically movable with respect to the supporting and fixing member so as to be held in parallel with the supporting and fixing member is provided at an appropriate position in the longitudinal direction. 2. A supporting frame is a pair of frames for fixedly supporting a lower plate and a supporting and fixing member at both ends in a longitudinal direction thereof, and a pair of rotating shafts with respect to the pair of supporting frames. A link mechanism that is rotatably supported at both ends via bearings, and that is close to each of the supporting frames, converts the rotation of the rotation shaft into a vertical movement and transmits the rotation to the upper panel. The metal plate cutting device according to claim 1, wherein each of the metal plates is installed. 3. The apparatus according to claim 1, wherein at least one intermediate bearing is provided at an intermediate portion of the supporting and fixing member, and the intermediate portion of the rotating shaft is rotatably supported by the intermediate bearing. 3. The metal plate cutting device according to 2. 4. The metal plate according to claim 3, wherein a link mechanism for converting the rotation of the rotation shaft into a vertical movement and transmitting the rotation to the upper plate is installed near the intermediate bearing portion. Cutting device. 5. The metal plate cutting device according to claim 2, wherein a plurality of guide holding mechanisms are provided at predetermined intervals in a longitudinal direction at an intermediate portion of the supporting and fixing member. 6. One of a pair of supporting frames,
6. A motor as a drive source for rotating the rotating shaft, and a transmission mechanism for transmitting the rotation of the motor to the rotating shaft are provided, respectively. Metal plate cutting equipment.