Punching device

Abstract

The present invention provides a punching device capable of adjusting the punching pressure without providing a driving source dedicated to the punching pressure adjustment. The present invention comprises a mobile platform (1) and a fixed platform (2), a moving mechanism, and a control unit, wherein the mobile mechanism moves the mobile platform (1) up and down toward the fixed platform (2), and the control unit controls the moving mechanism, wherein the mobile mechanism makes the mobile platform (1) approach the fixed platform (2), thereby punching a sheet material using a die installed on the fixed platform (2) in a punching machine (100), wherein the moving mechanism has four lifting and transmission mechanisms (4) and four punching motors (3), wherein the four lifting and transmission mechanisms (4) pressurize the mobile platform (1) upwards with four pressurizing parts whose horizontal positions are different from each other, and the four punching motors (3) drive the lifting and transmission mechanisms (4) respectively.

Description

Technical Field

[0001] The invention relates to a punching device. Background Art

[0002] In the past, a punching device is known, which includes a mobile platform and a relative platform arranged relative to each other in the up-down direction, a moving mechanism that moves the mobile platform up and down toward the relative platform, and a control component that controls the moving mechanism. The moving mechanism makes the mobile platform close to the relative platform, thereby using a die installed on one of the mobile platform and the relative platform to punch the workpiece into a predetermined shape.

[0003] As such a punching device, patent document 1 describes a punching device in which a moving mechanism includes a connecting rod mechanism, which pushes up a lower movable platform through the rotation of a crankshaft of the connecting rod mechanism, and uses a punch to punch a workpiece between the lower movable platform and the upper fixed platform.

[0004] [Prior art literature]

[0005] [Patent Document]

[0006] Patent Document 1: Japanese Patent Application Publication No. 2011-136394 Summary of the invention

[0007] [Problems to be solved by the invention]

[0008] In a punching device that moves a movable platform toward a relative platform, the force pressing the workpiece against the die, i.e., the punching pressure, may become uneven due to the configuration of the cutting blade of the die or the manufacturing error of the die. Sometimes, at a location where the punching pressure is low, the cutting blade of the die may not be able to punch the workpiece, resulting in uneven cutting.

[0009] The punching device of Patent Document 1 includes a punching pressure adjustment mechanism that adjusts the punching pressure by adjusting the vertical positions of the lower ends of the link mechanism on the sheet inlet side and the sheet outlet side where the sheet, which is a workpiece, enters and exits.

[0010] However, the punching device of Patent Document 1 includes a driving source for driving a punching pressure adjustment mechanism in addition to a driving source for a moving mechanism that moves a moving platform for punching. The driving source of the punching pressure adjustment mechanism is a driving source dedicated to the punching pressure adjustment that stops during punching and does not contribute to obtaining the punching pressure required for punching.

[0011] [Technical solutions for solving technical problems]

[0012] In order to solve the above-mentioned problem, the present invention is characterized in that it includes a movable platform and a relative platform, a movable mechanism, and a control component. The movable platform and the relative platform are relatively arranged in the up-down direction. The movable mechanism causes the movable platform to move up and down toward the relative platform. The control component controls the movable mechanism. The movable mechanism is a punching device that punches the workpiece into a predetermined shape by making the movable platform close to the relative platform, thereby utilizing a die installed on at least one of the movable platform and the relative platform. The movable mechanism has a plurality of pressurizing mechanisms and a plurality of driving sources. The plurality of pressurizing parts of the plurality of pressurizing mechanisms, which are located at different positions in the horizontal direction, respectively pressurize the movable platform toward the relative platform, and the plurality of driving sources respectively drive the plurality of pressurizing mechanisms.

[0013] [Effects of the invention]

[0014] According to the present invention, there is an excellent effect that the punching pressure can be adjusted without providing a driving source dedicated to the punching pressure adjustment which does not contribute to obtaining the punching pressure required for punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic three-dimensional diagram of the punching system.

[0016] Figure 2 This is the front view of the punching machine.

[0017] Figure 3 It is a side view of the upstream side of the punching machine.

[0018] Figure 4 It is a side view of the downstream side of the punching machine.

[0019] Figure 5 This is a front view of the punching machine without showing the front frame and the inner frame.

[0020] Figure 6 It is a rear view of the punching machine without showing the front frame and the inner frame.

[0021] Figure 7 This is a perspective view of the punching machine without showing the front frame and the inner frame.

[0022] Figure 8 It is a schematic diagram of the upstream side of the punching machine.

[0023] Fig. 9 It is a block diagram of a punching machine.

[0024] Fig.10 This is a schematic diagram of the lifting and lowering transmission mechanism.

[0025] Fig.11This is an explanatory diagram showing the displacement of the lift transmission rod and the cylindrical portion when the lift transmission mechanism is driven to move the cylindrical portion from the bottom dead point to the top dead point.

[0026] Fig.12 This is an illustration of the cutting height adjustment screen.

[0027] Fig.13 This is a three-dimensional illustration of the level adjustment jig.

[0028] Fig.14 These are the top and front views of the horizontal adjustment fixture.

[0029] Fig.15 It is an explanatory diagram showing the difference in the displacement amount of the eccentric shaft portion caused by the difference in the rotational position of the eccentric shaft.

[0030] Fig.16 This is a schematic diagram of the upstream side surface of the punching machine to which a belt support mechanism is added.

[0031] Fig.17 It is the front view of the conveyor belt pair.

[0032] Fig.18 is a rear view of the conveyor belt pair and the moving platform.

[0033] Fig.19 It is a schematic diagram of the front of the punching machine.

[0034] Fig. 20 This is an explanatory diagram of a punching machine while conveying a sheet. DETAILED DESCRIPTION

[0035] Hereinafter, the same or equivalent components, members and processes shown in the respective drawings are marked with the same reference numerals, and repeated descriptions are appropriately omitted. In addition, for ease of understanding, the sizes of the members in the respective drawings are appropriately enlarged or reduced. In addition, in the respective drawings, a part of the members that are not important in explaining the embodiments is omitted.

[0036] Hereinafter, one embodiment of the punching device and the punching processing system including the punching device of the present invention will be described.

[0037] Figure 1 It is a schematic perspective view of a punching system 500 which is a punching processing system according to the present embodiment.

[0038] The punching system 500 includes a sheet feeder 200 , a positioning device 300 , a punching machine 100 , and a discharge processing device 400 from the upstream side in the conveyance direction of a sheet to be processed.

[0039] In the punching system 500, the workpiece supplying component, i.e., the sheet supplying machine 200, supplies the sheet placed on the loading frame to the positioning device 300. The workpiece position correction component, i.e., the positioning device 300, adjusts the inclination of the sheet relative to the direction parallel to the conveying direction of the sheet (the X-axis direction in the figure) and the position of the sheet in the width direction (the Y-axis direction in the figure), and conveys the sheet to the punching machine 100. The punching component, i.e., the punching machine 100, performs the following processing: temporarily stopping the sheet supplied from the positioning device 300, and punching the sheet into the shape of a die mounted on the fixed platform by clamping the sheet with a fixed platform and a movable platform, which will be described in detail later. The discharge processing device 400 includes: a discharge unit that receives the sheet discharged after the punching process by the punching machine 100; a separator that separates the punched sheet into a finished product and a residual portion; and a stacker that stacks the separated finished products.

[0040] like Figure 1 As shown, the punching machine 100 includes an operation panel 101 on an upper surface thereof.

[0041] Next, the punching machine 100 will be described.

[0042] Figure 2 to Figure 7 It is an explanatory diagram of the punching machine 100 in a state where the outer cover is removed. Figure 2 It is a front view of the punching machine 100 . Figure 3 is from Figure 2 An upstream side view of the punching machine 100 as viewed from the right side in FIG. Figure 4 is from Figure 2 A downstream side view of the punching machine 100 as viewed from the left side in FIG. Figure 5 is relative to Figure 2 The front view of the punching machine 100 without showing the front frame 5 and the inner frame 6, Figure 6 It is not displayed Figure 5 The state shown is a rear view of the punching machine 100 near the front frame 5 and the inner frame 6. In addition, Figure 7 This is a perspective view of the punching machine 100 without showing the front frame 5 and the rear frame 6 .

[0043] Figure 8 It is schematically indicated Figure 3 An explanatory diagram of an upstream side view of the punching machine 100 shown.

[0044] like Figure 2 to Figure 7 As shown, the punching machine 100 includes: a mobile platform 1, which can move up and down relative to the frame (5, 6, 7, etc.) of the device; and a fixed platform 2, which is relatively arranged above the mobile platform 1 and fixed to the frame of the device.

[0045] The punching machine 100 is a metal frame structure, including a gantry frame 7, a front frame 5, an inner frame 6, an upstream guide frame 21, and a downstream guide frame 23. The gantry frame 7 has casters for movement and a movement prevention fixing mechanism. The front frame 5 and the inner frame 6 are sheet-like components, and their lower parts are fixed to the gantry frame 7. The upstream guide frame 21 and the downstream guide frame 23 are prismatic components extending in the width direction of the device and having their ends fixed to the front frame 5 and the inner frame 6.

[0046] The fixed platform 2 is fixed to the upper part of the front frame 5 and the inner frame 6. Figure 8 As shown, a die 8 having a cutting blade 81 is fixed to the lower surface of the fixed platform 2 with a stainless steel plate 82 interposed therebetween. On the other hand, a panel 9 is fixed to the upper surface of the movable platform 1.

[0047] The punching machine 100 is a moving mechanism for moving the mobile platform 1 up and down, and includes four lifting and transmitting mechanisms 4 (4a, 4b, 4c, 4d) and four punching motors 3 (3a, 3b, 3c, 3d). The mobile platform 1 has four cylindrical parts 10 (10a, 10b, 10c, 10d) fixed at its lower part, whose axial direction is parallel to the conveying direction. The lifting and transmitting mechanism 4 includes a crank mechanism that converts the input rotational motion into reciprocating motion in the up and down directions. The punching motor 3 is driven to rotate, and the lifting and transmitting mechanism 4 transmits the lifting motion to the cylindrical part 10, thereby the mobile platform 1 moves in the up and down directions.

[0048] Figure 2 to Figure 7 This is an explanatory diagram of a state in which all four cylindrical portions 10 are located at the bottom dead point of the lifting transmission mechanism 4 and the mobile platform 1 is farthest away from the fixed platform 2 within the movable range of the mobile platform 1 .

[0049] Figure 8 This is an explanatory diagram showing a state in which the movable platform 1 is raised to the upper stop position and the sheet S is punched by the cutting blade 81 of the die 8 .

[0050] Mobile platform 1 Figure 3 As shown, the central portion in the width direction of the surface on the upstream side in the conveying direction includes an upstream guided shaft 11, which protrudes toward the upstream side in the conveying direction in parallel with the X-axis in the figure. Figure 4 As shown, the central portion of the width direction of the surface on the downstream side in the conveying direction includes a downstream guided shaft 12, which protrudes to the downstream side in the conveying direction parallel to the X axis in the figure. The upstream guided shaft 11 and the downstream guided shaft 12 are provided with an upstream guided bearing 11a and a downstream guided bearing 12a.

[0051] like Figure 3As shown, the upstream guide frame 21 includes an upstream guide portion 22 at the center portion in the width direction. The upstream guide portion 22 includes two upstream guide rails 22a protruding toward the downstream side in the conveying direction and extending in the up-down direction, and the two upstream guide rails 22a are engaged in a manner of sandwiching the upstream guided bearing 11a, thereby restricting the movement of the upstream guided shaft 11 in the width direction.

[0052] In addition, if Figure 4 As shown, the downstream guide frame 23 includes a downstream guide portion 24 in the central portion in the width direction. The downstream guide portion 24 includes two downstream guide rails 24a protruding toward the upstream side in the conveying direction and extending in the up-down direction, and the two downstream guide rails 24a are engaged in a manner of sandwiching the downstream guided bearing 12a, thereby restricting the movement of the downstream guided shaft 12 in the width direction.

[0053] By restricting the widthwise movement of the upstream guided shaft 11 and the downstream guided shaft 12 by the upstream guide portion 22 and the downstream guide portion 24 , it is possible to prevent the displacement of the movable platform 1 in the widthwise direction when the movable platform 1 moves up and down.

[0054] The punching machine 100 includes a pair of conveyor belts (14, 15) for conveying the sheet S to the movable platform 1 along the inner side in the width direction. In addition, it also includes a belt drive motor 13, which is a driving source of the conveyor belt pair, and a belt drive transmission mechanism 16 for transmitting the driving force. By driving the belt drive motor 13, the lower conveyor belt 14 and the upper conveyor belt 15 move in a circular manner at the same surface moving speed, and the lower conveyor belt 14 and the upper conveyor belt 15 are used to sandwich one end of the sheet S in the width direction for conveyance.

[0055] When the belt drive motor 13 is driven, the entrance drive roller 20a of the entrance roller pair 20 also rotates. The entrance roller pair 20 conveys the sheet S by sandwiching the entrance drive roller 20a and the entrance driven roller 20b at a plurality of positions in the width direction.

[0056] The lower conveyor belt 14 and the upper conveyor belt 15 are mounted on a plurality of mounting rollers. Some of the mounting rollers define the paths of the lower conveyor belt 14 and the upper conveyor belt 15 in such a manner that a surface that sandwiches the sheet S is horizontally formed between the upper mounting surface of the lower conveyor belt 14 and the lower mounting surface of the upper conveyor belt 15. The mounting rollers that form the surface that sandwiches the sheet S are supported by roller retaining members that can move up and down.

[0057] When punching is performed, the sheet S is conveyed to a position between the mobile platform 1 and the fixed platform 2, and the lower conveyor belt 14 and the upper conveyor belt 15 are stopped. The mobile platform 1 includes a protrusion protruding toward the inner side in the width direction, and is configured as follows: when the mobile platform 1 rises, the protrusion pushes up the roller holding member, so that the mounting surface formed by the mounting rollers held by the roller holding member rises together with the mobile platform 1. Thus, as the mobile platform 1 rises, the sheet S to be processed can be raised toward the fixed platform 2.

[0058] As a structure for moving the sheet S sandwiched by the conveyor belt pair (14, 15) in the vertical direction, it is also possible to include a belt drive mechanism (belt drive motor 13, belt drive transmission mechanism 16) so that the conveyor belt pair (14, 15) is held by a holding unit that can move in the vertical direction. In this case, the holding unit is pushed up, and the holding unit holds the conveyor belt pair including the belt drive mechanism on the protruding portion of the movable platform 1.

[0059] Fig. 9 is a block diagram of the punching machine 100 .

[0060] The control unit 30 of the punching machine 100 controls the driving of the four punching motors 3 (3a to 3d) and the belt drive motor 13 based on the output from the operation panel 101 or the rear end detection sensor 25. In the punching machine 100 of this embodiment, the control unit 30 can independently control the driving of the four punching motors 3 (3a to 3d).

[0061] Next, the preparation operation for punching will be described.

[0062] In the sheet feeding machine 200 , a bundle of sheets S to be punched is placed on a placement rack.

[0063] In the punching machine 100, the die 8 is set on the fixed platform 2, and the panel 9 is set on the mobile platform 1. When the die 8 or the panel 9 is set, the discharge unit provided in the discharge processing device 400 at the position closest to the punching machine 100 is manually or electrically lowered. As a result, the exit side of the space between the fixed platform 2 and the mobile platform 1 through which the sheet S passes is opened, and access from the outside becomes possible.

[0064] Below the fixed platform 2, there is a die slide guide that enables the die 8 to slide in the direction along the conveying direction. By inserting the die 8 from the downstream side of the conveying direction of the device body into the space below the fixed platform 2, the die 8 slides along the die slide guide toward the upstream side in the conveying direction. By inserting the die 8 until it hits the front die abutment plate 19 in the insertion direction of the die 8, and pulling down the die fixing rod 17 to make it Figure 2In the state shown in FIG. 1 , the die fixing member 18 is locked in a state where the die 8 is in contact with the die abutting plate 19 and the die 8 is in contact with the lower surface of the fixed platform 2 . Thus, the die 8 is fixed to the fixed platform 2 .

[0065] When an identifier such as a barcode for calling up information on the die 8 is given to the die 8 , the die 8 is set on the fixed stage 2 after the identifier is read by a reading means such as a portable scanner.

[0066] After the die 8 and the panel 9 are set, the discharge unit is raised manually or electrically until it reaches a predetermined position.

[0067] Next, the operation settings are performed using the operation panel 101 or an external input device. The setting contents include the size of the sheet S, the height of the cutting blade 81 of the die 8, the thickness of the sheet of the die 8, the number of punching times, the die reference position, and the sheet reference position.

[0068] Here, the thickness of the sheet of the die 8 refers to the sum of the thicknesses of the stainless steel plate 82 fixed to the upper surface of the die 8, the image sheet fixed to the upper surface of the stainless steel plate 82 and depicting the configuration of the cutting blade 81 of the die 8, and the protective sheet covering the upper surface of the image sheet.

[0069] The die 8 is inserted and removed from the punching machine 100 in a state where the stainless steel plate 82, the image sheet to which the bottom steel tape is attached as needed, and the protection sheet are stacked in this order on the upper surface.

[0070] The stainless steel plate 82 is a member that prevents the cutting blade 81 of the die 8 from being pushed up to the panel 9 and protruding from the back side (upper surface) of the die 8. The image sheet can confirm the configuration of the cutting blade 81 of the die 8, and can paste the shim tape for eliminating unevenness on the upper surface of the image sheet in advance when the position where the punching pressure is insufficient is known based on the configuration of the cutting blade 81. In order to cover and protect the upper surface of the image sheet to which the shim tape for eliminating unevenness is pasted, the protective sheet can prevent the shim tape for eliminating unevenness from rubbing against the lower surface of the fixed platform 2 and being peeled off when the die 8 is slid to set it.

[0071] The die reference position and sheet reference position are reference values ​​input in the operation setting so that the stop position of the sheet S during the punching process matches the position of the cutting edge 81 of the die 8 to be cut.

[0072] The sheet S stops at a time when a predetermined number of stop pulses is obtained after the rear end detection sensor 25 arranged upstream of the belt pair (14, 15) detects the rear end of the sheet S, and is punched at the stop position.

[0073] In the operation setting, the operator selects any blade reference point in the cutting blade 81 of the die 8, and inputs the distance from the blade reference point to the upstream end of the die 8, that is, the die reference position. In addition, the operator selects a cut reference point corresponding to the blade reference point in the position to be cut on the sheet S to be punched, and inputs the distance from the cut reference point to the upstream end of the sheet S to be punched, that is, the sheet reference position.

[0074] The control unit 30 calculates and sets the above-mentioned stop pulse number based on the input die reference position and sheet reference position, so that the sheet S stops at the stop position where the blade reference point coincides with the cut reference point. Through this process, the cutting blade 81 of the die 8 can be made consistent with the position to be cut on the sheet S during the punching process.

[0075] When the operation performed by the punching machine 100 includes a folding process of adding a fold to the sheet S, an operation of fixing the fold relative concave member to the panel 9 is performed. In this operation, a double-sided tape is attached to the lower surface of the fold relative concave member, and the fold relative concave member and the clip are attached to the fold convex portion provided on the die 8. In this state, when the fold concave portion transfer button is operated, the movable platform 1 moves with a smaller movement amount than the punching process action, the panel 9 contacts the lower surface of the relative concave member, and the relative concave member is attached to the panel 9 using the double-sided tape. Since there is a clip remaining in the attached relative concave member, the panel 9 is removed from the movable platform 1, the clip as an unnecessary member is removed, and the panel 9 is fixed to the movable platform 1.

[0076] In the punching machine 100 , after the various settings described above are made, an adjustment process is performed so that appropriate punching can be performed before a mass production process in which the sheets S are continuously conveyed and the punching process is continuously performed.

[0077] In the adjustment process, a test feed is performed in which only one sheet S is fed and punched. In the test feed, the punching machine 100 performs the punching process without performing the separation process of the separator, and the punched product and the sheet without separating the remaining portion are discharged to the stacker.

[0078] The operator performs test feeding by pressing the test feeding button of the operation panel 101, thereby observing the finished product during the test feeding and adjusting each part. The test feeding and adjustment operations are repeated as needed.

[0079] The adjustment operation is performed using the operation panel 101, but may also be performed using an external input device.

[0080] The adjustment targets include the position of the sheet S in the width direction, the skew of the sheet S with respect to the conveying direction, the position of the sheet S in the conveying direction when the sheet S is stopped during punching, etc. In addition, as will be described in detail later, the punching machine 100 of this embodiment can also perform adjustment to trim the uneven cutting by operating the operation panel 101. The operator visually inspects the sheet S obtained in the test supply and performs such adjustment operation based on the cutting deviation and uneven cutting.

[0081] After the adjustment process, the operator inputs the number of sheets to be processed and the processing speed through the operation panel 101 and presses the start button to execute the mass production process. The mass production process is stopped when the input number of sheets to be processed is full, an error is detected, or the operator operates the stop button.

[0082] The start button and the stop button may be provided not only on the operation panel 101 but also on the operation portion of the sheet feeding machine 200 so that the buttons can be operated from either one.

[0083] Next, the operation of the punching process in the punching machine 100 will be described.

[0084] When the start button of the operation panel 101 is pressed, the sheet S is fed out from the sheet feeder 200, and the inclination and width direction position of the sheet S are corrected in the positioning device 300, and the sheet S is fed to the punching machine 100. In the punching machine 100, the belt drive motor 13 is driven, and the lower conveyor belt 14 and the upper conveyor belt 15 of the conveyor belt pair start to move in a circular motion. Then, the sheet S supplied from the positioning device 300 is conveyed by the conveyor belt pair. After a predetermined timing has passed since the rear end detection sensor 25 arranged on the upstream side of the conveyor belt pair detects the rear end of the sheet S, the belt drive motor 13 is stopped. As a result, the sheet S clamped by the conveyor belt pair stops at the punching position between the movable platform 1 and the fixed platform 2.

[0085] Next, the four punching motors 3 are driven to raise the movable platform 1. When the movable platform 1 rises, the protrusion of the movable platform 1 pushes up the roller holding member, and the sheet S at the conveying height also rises. By driving the four punching motors 3 forward and stopping them at a predetermined rotation amount, the movable platform 1 reaches the upper stop position, and the sheet S is punched into the shape of the cutting blade 81 of the die 8.

[0086] Next, the four punching motors 3 are reversely driven and stopped at a predetermined rotation amount, and the movable platform 1 descends and reaches the lower stop position. At this time, the roller holding member also descends together with the movable platform 1, and the sheet S descends to the conveying height. Then, by restarting the driving of the belt drive motor 13, the sheet S subjected to the punching process is conveyed to the discharge processing device 400, and the subsequent sheet S supplied from the positioning device 300 is conveyed to the punching position by sandwiching it with the conveyor belt.

[0087] During mass production processing, these actions are repeated.

[0088] In the above description, after the belt drive motor 13 stops, the punch motor 3 is driven in the forward direction, and after the reverse drive of the punch motor 3 stops, the drive of the belt drive motor 13 is restarted, but the drive timing of the motor is not limited to this. Within the range where poor transmission of the sheet S such as clogging does not occur, the punch motor 3 can be driven in the forward direction before the belt drive motor 13 stops, and the drive of the belt drive motor 13 can be restarted before the reverse drive of the punch motor 3 stops. By setting a period in which the drive period of the belt drive motor 13 overlaps with the drive period of the punch motor 3, it is possible to improve the processing speed.

[0089] Next, the operation of the press motor 3 during the punching operation will be described.

[0090] When the belt drive motor 13 is driven, the control unit 30 controls the rotation position so that the lifting and lowering transmission mechanism 4 waits at the lower stop position and the rotation position of the punch motor 3 as a servo motor becomes the lower reference rotation position corresponding to the lower stop position.

[0091] After a predetermined timing has passed since the rear end detection sensor 25 detects the passage of the rear end of the sheet S, the belt drive motor 13 is stopped and the positive rotation of the punching motor 3 is started. Then, the punching motor 3 is rotated positively to the upper reference rotation position and stopped, so that the lifting and conveying mechanism 4 is in the upper stop position.

[0092] When the rotational positions of all four punching motors 3 reach the upper reference rotational position and the forward rotation stops, the motors 3 wait for a predetermined time (20 msec) and then start reverse rotation. The four punching motors 3 stop when they reversely rotate to the lower reference rotational position.

[0093] In this way, the four punching motors 3 perform the punching process by repeating the forward rotation from the lower reference rotation position to the upper reference rotation position and the reverse rotation from the upper reference rotation position to the lower reference rotation position.

[0094] Fig.10This is a schematic explanatory diagram of one of the four lifting and lowering transmission mechanisms 4. Fig.10 (a) is an illustration of the X-Z plane. Fig.10 (b) is an illustration of the Y-Z plane. Fig.10 (c) is a stereogram.

[0095] like Fig.10 As shown, the lifting transmission mechanism 4 includes: a rotation input gear 41, which is engaged with the rotation output gear 31; an eccentric shaft 44, which rotates together with the rotation input gear 41; and a shaft holding portion 42, which is fixed to the stage frame 7 and rotatably holds the rotating shaft portion 441 of the eccentric shaft 44. Furthermore, the lifting transmission mechanism 4 includes a lifting transmission rod 43, the lower portion of which is engaged with the eccentric shaft portion 442 of the eccentric shaft 44, and the upper portion is engaged with the cylindrical portion 10 of the moving platform 1.

[0096] Fig.11 The diagram is an explanatory diagram showing displacement of the lift transmission rod 43 and the cylindrical portion 10 when the eccentric shaft 44 is rotated about the center line of the rotation shaft portion 441 so that the cylindrical portion 10 moves from the bottom dead center to the top dead center. Fig.11 (a) is an explanatory diagram of a state where the cylindrical portion 10 is located at the bottom dead center. Fig.11 (b) is an explanatory diagram of a state where the cylindrical portion 10 is located between the bottom dead center and the top dead center. Fig.11 (c) is an explanatory diagram of a state where the cylindrical portion 10 is located at the top dead center.

[0097] The eccentric shaft 44 is a member in which the center lines of the rotating shaft 441 engaged with the shaft holding part 42 and the eccentric shaft 442 engaged with the lifting transmission rod 43 are located at different positions. The rotation input gear 41 and the rotating shaft 441 have the same center line position.

[0098] When the punching motor 3 is driven to rotate and the rotary output gear 31 rotates, the rotary input gear 41 rotates, and the eccentric shaft 44 to which the rotary input gear 41 is fixed rotates around the center line of the rotary shaft 441. As a result, the eccentric shaft 442 rotates and moves around the center axis of the rotary shaft 441, and the lifting transmission rod 43 engaged with the eccentric shaft 442 and the cylindrical part 10 engaged with the lifting transmission rod 43 move. At this time, the movable platform 1 with the cylindrical part 10 moves in the width direction ( Fig.11 The movement of the eccentric shaft 442 in the left and right directions (in the direction parallel to the Y axis) will be restricted by the upstream guide 22 and the downstream guide 24, and the cylindrical portion 10 will not move in the width direction. Therefore, when the eccentric shaft portion 442 is displaced in the vertical direction and the width direction due to the rotation of the eccentric shaft 44, as shown in FIG. Fig.11 As shown in (b), the lifting transmission rod 43 will be inclined, and the cylindrical part 10 will only move in the up-down direction.

[0099] In the eccentric shaft 44 of this embodiment, the eccentricity between the central axis of the rotating shaft portion 441 and the central axis of the eccentric shaft portion 442 is 15 [mm]. Fig.11 The state of the bottom dead center shown in (a) is rotated to Fig.11 The displacement amount of the cylindrical portion 10 when the cylindrical portion 10 reaches the state of the top dead center shown in (c), that is, the vertical movable range H is 30 [mm].

[0100] The moving mechanism that moves the mobile platform 1 has four lifting and transferring mechanisms 4 (4a~4d) as multiple pressurizing mechanisms, and four stamping motors 3 (3a~3d) as multiple driving sources that drive them respectively. The above-mentioned pressurizing mechanisms independently pressurize the four cylindrical parts 10 as multiple pressurizing parts.

[0101] The control unit 30 can independently control the driving of the four press motors 3, and thus can change the upper reference rotation position corresponding to the upper stop position for each press motor 3. Thus, the height of the cylindrical portion 10 at the upper stop position can be changed individually.

[0102] In the punching machine 100 of this embodiment, control is not performed to rotate the eccentric shaft 44 once, but control is performed to move the cylindrical portion 10 between the lower stop position and the upper stop position, which are the range between the lower dead center and the upper dead center.

[0103] Regarding the rotation angle θ of the eccentric shaft 44, when the cylindrical portion 10 is at the lower dead center, θ=0[°], and when the cylindrical portion 10 is at the upper dead center, θ=180[°]. Here, when the rotation angle of the eccentric shaft 44 when the cylindrical portion 10 is at the lower stop position is recorded as θ1, and the rotation angle when the cylindrical portion 10 is at the upper stop position is recorded as θ2, the following relationship (1) holds.

[0104] 0[°]≤θ1<θ2<180[°]······(1)

[0105] Thus, by making the rotation angle at the upper stop position smaller than the rotation angle at the top dead center, the rotation angle “θ2” of the cylindrical portion 10 at the upper stop position can be changed, and the position of the cylindrical portion 10 at the upper stop position can be adjusted.

[0106] When pressurizing, the four stamping motors 3 in the lower reference rotation position state corresponding to the starting position of the lifting and transmitting mechanism 4, that is, the state where the cylindrical portion 10 is located at the lower stop position, are rotated forward at the same speed. Then, the stamping motors 3 that are rotating stop sequentially from the upper reference rotation position corresponding to the upper stop position of the lifting and transmitting mechanism 4. In the case where the "θ2" of the four stamping motors 3 are different from each other, the stamping motor 3 with a larger rotation amount from the lower reference rotation position to the upper reference rotation position will stop later than the other stamping motors 3.

[0107] Alternatively, the rotation amount from the lower reference rotation position to the upper reference position may be calculated respectively, and the larger the rotation amount of the stamping motor 3, the faster the rotation speed is, and all stamping motors 3 are controlled so that the driving time from the lower reference rotation position to the upper reference rotation position is the same.

[0108] Alternatively, when the rotation amounts of the upper reference rotation positions of the punching motors 3 are different from each other, the rotation amount of the lower reference rotation position is set to be the same as the number of rotations to the upper reference rotation position. Thus, even if the rotation amounts of the upper reference rotation positions are different from each other in the punching motor 3, the drive time and the rotation speed from the lower reference rotation position to the upper reference rotation position can be set to the same value. Furthermore, during the punching action, it is possible to shorten the time required for the punching action without lengthening the drive time of a part of the punching motors 3 or slowing down the rotation speed. The setting of the rotation amount of the lower reference rotation position can be automatically calculated by the control unit 30 or input by the user.

[0109] As described above, the punching machine 100 of the present embodiment can change the upper reference rotation position corresponding to the upper stop position for each punching motor 3 and can individually change the height of the cylindrical portion 10 at the upper stop position.

[0110] According to such a configuration, by making a change to increase the rotation amount of one punching motor 3 at the upper reference rotation position, the value of the rotation angle "θ2" of the eccentric shaft 44 at the upper reference rotation position becomes larger, and the position of the cylindrical portion 10 at the upper stop position becomes higher. As a result, the contact pressure between the panel 9 and the die 8 during the punching process, that is, the punching pressure, can be increased at the vertical upper part of the cylindrical portion 10 whose position becomes higher at the upper stop position.

[0111] In this way, in a structure that can increase the contact pressure portion between the panel 9 and the die 8 during the punching process, the rotation amount of the upper reference rotation position of the punching motor 3 can be increased, so that the upper stop position of the cylindrical portion 10 below the position where uneven cutting occurs during test supply is increased, thereby making a correction to eliminate uneven cutting.

[0112] That is, the punching pressure that is adjusted by sticking a bottom steel strip for eliminating unevenness to the back of the die in a conventional punching machine can be adjusted by changing the rotation amount of the upper reference rotation position of the motor 3 .

[0113] For example, when uneven cutting occurs on the front upstream side of the sheet S output during the test supply, the rotation amount of the upper reference rotation position of the first punching motor 3a is set to be larger. As a result, the value of the rotation angle "θ2" of the eccentric shaft 44 of the first lifting and transmitting mechanism 4a becomes larger, and the position of the first cylindrical portion 10a at the upper stop position can be made higher than before the setting. In addition, the punching pressure on the front upstream side of the sheet S during the punching process can be increased, so that uneven cutting can be eliminated.

[0114] When the operation panel 101 is used to correct uneven cutting, four corners are shown on the operation panel 101, and the operator selects a corner for which the cutting pressure is desired to be changed, thereby displaying a screen for changing the cutting pressure of the corner.

[0115] Fig.12 This is an explanatory diagram of a display screen (cutting height adjustment screen) of the operation panel 101 for performing “cutting height adjustment” for correcting uneven cutting using the operation panel 101 .

[0116] The cutting height adjustment is used to adjust the pressure of the insufficiently cut position for the finished product that has been tested. In this embodiment, since the rotation amount of the four press motors 3 can be adjusted respectively, the cutting height has variable values ​​at the four corners.

[0117] exist Fig.12 In the display screen shown, a cutting height distribution display portion 75 is provided in the center portion.

[0118] At the lower right of the cutting height distribution display unit 75, there is a right front cutting height adjustment value display window 70 indicating the adjustment value of the first punching motor 3a, and above and below it, there are a right front cutting height increase button 71 for increasing the cutting height (upper stop position) of the right front of the mobile platform 1, and a right front cutting height decrease button 72 for decreasing the cutting height of the right front.

[0119] At the lower left of the cutting height distribution display section 75, there is a left front cutting height adjustment value display window 64 indicating the adjustment value of the second punching motor 3b, and above and below it, there are a left front cutting height increasing button 65 for increasing the cutting height of the left front of the mobile platform 1, and a left front cutting height decreasing button 66 for decreasing the cutting height of the left front.

[0120] At the upper right of the cutting height distribution display unit 75, there is a right inner cutting height adjustment value display window 67 indicating the adjustment value of the third punching motor 3c, and above and below it, there are a right inner cutting height increase button 68 for increasing the cutting height of the right inner side of the mobile platform 1, and a right inner cutting height decrease button 69 for decreasing the cutting height of the right inner side.

[0121] At the upper left of the cutting height distribution display section 75, there is a left inner cutting height adjustment value display window 61 indicating the adjustment value of the fourth punching motor 3d, and above and below it, there are a left inner cutting height increase button 62 for increasing the cutting height of the left inner side of the movable platform 1, and a left inner cutting height decrease button 63 for decreasing the cutting height of the left inner side.

[0122] Furthermore, at the upper center of the cutting height distribution display portion 75, there are provided an overall cutting height increase button 73 for increasing the cutting heights at all four locations, and an overall cutting height decrease button 74 for decreasing the cutting heights at all four locations.

[0123] In the present embodiment, the adjustment unit of the four corners of the cutting height is “0.01 [mm]” and the adjustment range is “0.00 to 2.50 [mm]”, but the present invention is not limited thereto.

[0124] In the present embodiment, in order to keep the panel 9 in a flat state, the panel 9 is changed in such a manner that the corner opposite to the corner for adjusting the cutting height among the four corners is used as a fulcrum to follow the other two corners.

[0125] exist Fig.12 In the example shown, the adjustment is made to raise the left inner corner by "0.09". In this adjustment, the right front corner becomes the fulcrum, so the adjustment value does not change and remains at "0.00". On the other hand, the other two corners (left front corner and right inner corner) rise along with the rise of the left inner corner.

[0126] The cut height distribution display unit 75 schematically shows the height distribution of the upper surface of the mobile platform 1 , divides the upper surface of the mobile platform 1 into 16 areas, and displays the height of each area calculated based on the adjustment values ​​of the four corners.

[0127] exist Fig.12 In the cutting height distribution display unit 75, the distribution of the cutting height is indicated by numerical values, but the distribution of the cutting height may be displayed in color.

[0128] exist Fig.12In the cutting height adjustment screen shown, when a setting is input to increase the cutting pressure, the control unit 30 changes the setting so that the rotation amount of the upper reference rotation position of the corresponding punching motor 3 becomes larger. In addition, when a setting is input to reduce the cutting pressure, the control unit 30 changes the setting so that the rotation amount of the upper reference rotation position of the corresponding punching motor 3 becomes smaller. In addition, during the punching process, the control unit 30 controls each punching motor 3 to rotate forward to the set upper reference rotation position.

[0129] The punching machine 100 of this embodiment includes a structure that uses an independent punching motor 3 and a lifting transfer mechanism 4 to move the four corners of the movable platform 1 that moves from the bottom to the top during the punching process up and down respectively. In addition, because each punching motor 3 is configured to be able to adjust the rotation amount individually, the rising position of the four corners can be adjusted separately according to uneven cutting, thereby seeking to improve uneven cutting.

[0130] Since cutting unevenness occurs due to the arrangement of the cutting blade 81 of the die 8 or the manufacturing error of the die 8, when the die 8 once removed is mounted again in the punching machine 100, the same unevenness elimination process as the last mounting may be performed.

[0131] In the punching machine 100 of the present embodiment, the identification information of each die 8 is associated with the control information and stored in the storage unit of the control unit 30. As the control information at this time, the information of the upper reference rotation position of the four punching motors 3 when the die 8 was last installed is included. Thus, by inputting the identification information when installing the die 8, the control information associated with the identification information can be called to make the upper reference rotation position of the four punching motors 3 the setting at the time of last installation, and the operation burden during adjustment before mass production can be reduced, thereby shortening the setup time.

[0132] The die 8 preferably includes an identification information display portion such as a barcode or a management number. The identification information of the die 8 to be installed can be input by reading a barcode with a barcode reader provided in the punching machine 100 or inputting a management number etc. through the operation panel 101.

[0133] As a structure for setting an upper reference rotation position corresponding to the die 8, it can also be set as follows: a readable storage element such as an RF tag or an IC tag is set on the die 8, and control information including information on the upper reference rotation position of the four stamping motors 3 at the time of the last installation is pre-stored in the storage element of the die 8, and the upper reference rotation position is set based on the information of the storage element of the die 8 read during installation.

[0134] In the punching machine 100 of the present embodiment, when installing a new punching die 8, the upper reference rotation position of the four punching motors 3 can be set by operating the operation panel 101, thereby improving the uneven cutting, and thus reducing the pasting operation of the bottom steel strip for eliminating the unevenness. Furthermore, when installing a punching die 8 that has been installed twice or more, the control information of the last installation can be called and set by inputting the identification information, so that the semi-automatic and simplified adjustment before mass production can be sought.

[0135] As control information associated with the identification information of each of the above-mentioned dies 8, it is also possible to include information on any one or more operation settings of the height of the cutting blade 81 of the die 8, the thickness of the sheet of the die 8, the usage history of the die 8, and the die reference position. As the usage history, the usage time or the number of punching times can be cited.

[0136] When the pre-stored control information is changed while the die 8 is installed, it is associated with the identification information and stored in the lookup table. And, when the die 8 is installed next time and the identification information is input, the associated control information is automatically called and the operation setting is performed.

[0137] By associating the time-consuming process of installing and adjusting the die 8 and items that can confirm the accuracy by actually trial processing and generating waste paper as control information with the identification information of the die 8, the user's operational burden can be reduced and the setup time can be shortened.

[0138] Because the upper stop position of the mobile platform 1 is roughly determined by the die 8, the upper stop position of the mobile platform 1 can be automatically set by obtaining the setting information of the upper reference rotation position of the four stamping motors 3 at the time of the last installation as control information, which is advantageous in reducing the operating burden and shortening the setup time.

[0139] In the punching process, it is indispensable to input the reference position of the die 8. By acquiring the reference position of the die 8, that is, information on the die reference position as control information and automatically setting it, it is possible to shorten the adjustment time.

[0140] By acquiring the usage history of the die 8 as control information, the usage time and the number of punching times can be recorded, and management of the die 8 such as the replacement timing of the cutting blade 81 can be easily performed.

[0141] In addition, as control information, information on the compatibility of the die 8 and the sheet S such as paper may also be included. In this case, an identifier such as a barcode is given in advance to a portion of the sheet S to be cut in the die 8. In addition, an identifier reading component (CCD camera, etc.) for reading the identifier of the sheet S is arranged between the sheet feeder 200 and the punching machine 100. And before the punching process is performed, based on the information obtained by the identifier reading component and the identification information of the die 8, it is confirmed whether the sheet S and the die 8 are properly combined. In this way, it is possible to prevent the unnecessary punching process of the sheet S that is not compatible with the die 8, thereby preventing the generation of waste paper and preventing wasteful punching processes.

[0142] The punching machine 100 of the present embodiment can perform leveling adjustment so that the upper surface of the movable platform 1 and the lower surface of the fixed platform 2 are nearly parallel to each other when the movable platform 1 reaches the upper stop position.

[0143] Fig.13 It is a perspective view for explaining a level adjustment jig 50 used for leveling adjustment. Fig.14 2 is an explanatory diagram of the horizontal adjustment jig 50. Fig.14 (a) is a top view, Fig.14 (b) is the main view.

[0144] The level adjustment jig 50 is fixed to the fixed platform 2 instead of the die 8 and includes a jig body plate 51 having the same shape as the die 8 and four spacers 52 .

[0145] The spacers 52 are highly rigid members that are difficult to deform, and are manufactured with high precision so that the heights (lengths in the Z direction in the figure) of the four spacers 52 are uniform, and are fixed in a state where they penetrate four holes provided in the jig body plate portion 51. The four spacers 52 are arranged at positions that are opposite to the four corners of the upper surface of the rectangular movable platform 1 when the horizontal adjustment jig 50 is fixed to the fixed platform 2.

[0146] When performing leveling adjustment, the operator fixes the horizontal adjustment jig 50 to the fixed platform 2 and installs it on the punching machine 100 instead of the die 8, and inputs the operation of executing the leveling adjustment with the operation panel 101. The control unit 30, which has input the leveling adjustment operation, rotates the four stamping motors 3 simultaneously from the state where the four cylindrical parts 10 are located at the bottom dead center. After the four lifting transmission mechanisms 4 are rotated positively by a predetermined rotation amount (a certain pulse) set in advance within the range where the mobile platform 1 does not reach the horizontal adjustment jig 50, the control of the four stamping motors 3 is switched to a torque limit set to a low torque (a control that stops the rotation of the stamping motor 3 when the set torque is reached). The low torque here is the torque required to make the mobile platform 1 rise. When the mobile platform 1 hits something, it is a torque to the extent that the mobile platform 1 cannot move further. At least before the contact, it is rotated with an extremely low torque so that the mobile platform 1 stops when it contacts the spacer 52 of the horizontal adjustment jig 50. And the stopped position is stored as the horizontal reference position.

[0147] In the leveling adjustment, the respective press motors 3 of the corresponding four lifting and lowering transmission mechanisms 4 are rotationally driven with the rotation positions of the four cylindrical parts 10 at the top dead centers as targets.

[0148] However, in the control of torque limitation of low torque, when the upper surface of the mobile platform 1 contacts the spacer 52 of the horizontal adjustment jig 50 and hits the lower surface of the fixed platform 2 through the spacer 52, the rotation of the punching motor 3 will stop even if the rotation position of the cylindrical part 10 is not reached to the upper dead center, thereby causing a position deviation error. For example, when the lifting transmission mechanism 4 is driven so that the driving pulse of the punching motor 3 when the cylindrical part 10 moves from the lower dead center to the upper dead center is 1000 pulses, the control unit 30 drives the punching motor 3 with 1000 pulses as the target, but when the mobile platform 1 collides when driven at 995 pulses, the punching motor 3 cannot be driven due to torque limitation, which causes a position deviation error.

[0149] Since the four spacers 52 are highly consistent with each other, when the mobile platform 1 hits the fixed platform 2 via the four spacers 52, the upper surface of the mobile platform 1 and the lower surface of the fixed platform 2 will be parallel. At this time, since the rotation positions of the four punching motors 3 are rotation positions that can make the upper surface of the mobile platform 1 parallel to the lower surface of the fixed platform 2, the rotation positions are stored in the storage unit of the control unit 30 as horizontal reference positions. Here, the upper reference rotation positions of the four punching motors 3 can be set based on the stored horizontal reference positions, so that the upper surface of the mobile platform 1 and the lower surface of the fixed platform 2 are close to parallel when the mobile platform 1 reaches the upper stop position.

[0150] Alternatively, after the four punching motors 3 stop rotating due to a positional deviation error and the rotational position at that time is stored as the horizontal reference position, the motors are slightly reversely rotated and then the control of forward rotation is repeated again by the control of torque limitation with low torque. Furthermore, the horizontal reference position can be set by storing the information of the horizontal reference position where the rotation stops due to the positional deviation error for each of the four punching motors 3 for a plurality of times and calculating the average value of the plurality of horizontal reference positions stored in each punching motor 3, thereby obtaining more appropriate information of the horizontal reference position.

[0151] When the thickness of the die 8 including the cutting blade 81 is greater than the height of the spacer 52, the upper reference rotation position is set so that the upper stop position becomes lower by the difference between the two. In addition, when the thickness of the die 8 including the cutting blade 81 is less than the height of the spacer 52, the upper reference rotation position is set so that the upper stop position becomes higher by the difference between the two. Thus, when the die 8 is installed and the punching process is performed, the fluctuation of the pressure of the panel 9 on the die 8 can be prevented from becoming larger. In all cases, the value of the difference subtracted or added is the same for each of the four punching motors 3.

[0152] In the existing punching machine, leveling is not performed to correct the parallelism of the movable platform and the fixed platform. Therefore, when the parallelism of the movable platform and the fixed platform deteriorates due to assembly errors, component errors, or long-term use when manufacturing the punching machine, the following behavior is not performed: only by pasting a bottom steel strip for eliminating unevenness to correct the uneven cutting caused by the deterioration of parallelism, thereby improving the parallelism itself. In such an existing punching machine, it is necessary to correct the deteriorated parallelism part with the bottom steel strip, which may cause the following risks: the operating burden of the operator will increase, and the uneven cutting may not be fully eliminated due to the different abilities of the operator. Furthermore, in the case of correcting the deteriorated parallelism part with the bottom steel strip, it is necessary to paste a slightly larger amount of bottom steel strip at the same position each time, so the number of test supply will increase, and the waste paper will increase.

[0153] In the punching machine 100 of this embodiment, by performing leveling adjustment before installing the die 8, it is possible to prevent uneven cutting caused by deterioration of parallelism when installing the test supply of the die 8, thereby reducing the operator's operating burden of correcting uneven cutting. In addition, since the leveling adjustment is performed by the control of the control unit 30, it is possible to eliminate uneven cutting caused by deterioration of parallelism without relying on the operator's ability. Furthermore, it is possible to reduce waste paper.

[0154] Punching machine 100 Figure 2As shown in FIG. 1 , a first strain sensor 26a and a second strain sensor 26b are included on the upstream and downstream sides of the conveying direction of the near frame 5. Figure 3 and Figure 4 As shown, a third strain sensor 26c and a fourth strain sensor 26d are included on the upstream side and the downstream side of the inner frame 6 in the conveying direction.

[0155] The four strain sensors 26 ( 26 a , 26 b , 26 c , 26 d ) are elongation measuring components for measuring the elongation in the vertical direction of the front frame 5 and the inner frame 6 , which are holding components for holding the fixed platform 2 in the frame of the punching machine 100 .

[0156] The measurement positions are a plurality of positions (two positions in the present embodiment) of each of the front frame 5 and the rear frame 6 , which are frames on both sides away from the conveying path of the sheet S in the conveying direction.

[0157] The four strain sensors 26 are fixed near the upper end of the near frame 5 or the inner frame 6, and strain detection rods 27 (27a, 27b, 27c, 27d) are arranged below the strain sensors 26. The lower ends of the four strain detection rods 27 are fixed to detection rod fixing parts 28 (28a, 28b, 28c, 28d) near the lower end of the near frame 5 or the inner frame 6. Since only the lower end of the strain detection rod 27 is fixed to the near frame 5 or the inner frame 6, the position of the upper end thereof is not affected by the deformation of the near frame 5 or the inner frame 6. On the other hand, since the strain sensor 26 is arranged at the upper end of the near frame 5 or the inner frame 6, when the near frame 5 or the inner frame 6 is extended, it moves upward, and the distance to the upper surface position of the corresponding strain detection rod 27 becomes longer. When the extension is eliminated, the distance from the strain sensor 26 to the upper surface of the strain detection rod 27 is also restored. Therefore, the strain sensor 26 can detect the amount of extension of the front frame 5 or the rear frame 6 at the arranged position by measuring the change in the distance to the upper surface of the strain detection rod 27 arranged to face each other.

[0158] The four strain sensors 26 detect the extension of the front frame 5 or the rear frame 6 at the positions where they are installed as electrical signals. The control unit 30 can control the driving of the four press motors 3 based on the measurement results of the strain sensors 26 .

[0159] In the punching machine 100, at the moment of punching the sheet S, a large load is applied in the up-down direction, and the frame will be stretched. When the frame stretches, the punching pressure when the movable platform 1 is moved to the upper stop position will be reduced, so there is a risk of uneven cutting. Because the elongation of the frame will change according to the operation (combination of the die 8 and the sheet S, etc.) or adjustment, the rotation amount of each punching motor 3 that becomes the upper reference rotation position is corrected according to the measurement results of each strain sensor 26 during the adjustment process. The greater the elongation measured by the strain sensor 26, the more the correction is made to make the upper reference rotation position of the corresponding punching motor 3 close to the rotation position of the cylindrical part 10 as the upper dead center. As a result, the upper stop position of the movable platform 1 during punching can be increased at the position in the four corners where the elongation of the frame will increase during punching, thereby pre-correcting the reduction in punching pressure caused by the elongation of the frame. Therefore, the operating burden of the operator observing the finished product being tested and supplying and correcting the uneven cutting can be reduced, thereby shortening the adjustment time.

[0160] The strain sensor 26, which is an elongation measuring member, detects the change in the distance between the strain sensor 26 and the strain detection rod 27. The strain sensor 26 is fixed near the upper end of the frame, and the strain detection rod 27 is fixed near the lower end of the frame. As a structure for detecting the change in distance, a rotating rod is included, which is rotatable relative to the main body of the strain sensor 26 and contacts the upper surface of the strain detection rod 27, and the structure can be set to: the angle of the rotating rod is detected by the detection part of the strain sensor 26, and the change in the distance between the strain sensor 26 and the strain detection rod 27 is detected based on the detected angle. In addition, as another structure of the elongation measuring member, a structure can be set to calculate the distance from the reflective optical distance sensor fixed near one of the upper end and the lower end of the frame to the reflective part fixed near the other of the upper end and the lower end of the frame. Furthermore, as the elongation measuring member for measuring the elongation of the frame, it is not limited to using a distance sensor such as the strain sensor 26, and a strain gauge can be attached to the frame to measure the elongation of the frame.

[0161] The four punching motors 3 may be torque-limited during the punching process in order to prevent overload and damage to the components constituting the punching machine 100 when the four punching motors 3 are driven.

[0162] In this case, the control unit 30 preferably performs control to change the upper limit of the generated torque of the corresponding press motor 3 according to the rotational position of each of the four eccentric shafts 44 (the rotational angle of the eccentric shaft 44 when θ=0[°] when the cylindrical portion 10 is at the bottom dead center).

[0163] Fig.15It is an explanatory diagram showing the difference in the displacement amount of the eccentric shaft portion 442 due to the difference in the rotation position of the eccentric shaft 44 .

[0164] Fig.15 (a) is an explanatory diagram of the movement of the lifting transmission rod 43 and the cylindrical portion 10 when the eccentric shaft 44 rotates. Fig.15 (b) is an explanatory diagram of the difference in the displacement amount of the eccentric shaft portion 442 with respect to the same rotation amount (α1=α2=α3) in a state where the rotation position of the eccentric shaft 44 is different. Fig.15 “L” in (b) is the distance between the center line of the rotating shaft portion 441 of the eccentric shaft 44 and the center line of the eccentric shaft portion 442 .

[0165] Fig.15 In (b), “α1” is as follows Fig.15 As shown in (a) (i), the rotation angle of the eccentric shaft 44 is rotated from the state of "0 [°]" by "α", and the displacement amount is "L·sinα1". Fig.15 As shown in (ii) of (a), the eccentric shaft 44 is rotated by "α" around "90[°]", and the displacement is "L·sinα2". Fig.15 As shown in (iii) of (a), the eccentric shaft 44 is rotated by "α" toward the state where the rotation angle is "180[°]", and the displacement amount is "L·sinα3".

[0166] like Fig.15 As shown in (b), when the rotation angle is near "0[°]" or "180[°]", the displacement "L·sinα" relative to the rotation amount "α" is sufficiently smaller than that of the state near the rotation angle "90[°]". Therefore, even if the torque generated in the punching motor 3 is the same, the force to lift the cylindrical portion 10 is sufficiently greater in the state near the rotation angle "0[°]" or "180[°]" than in the state near the rotation angle "90[°]".

[0167] Therefore, in the case where the upper limit value of the generated torque is made constant, when the upper limit value of the generated torque is set to a high value in the state of the rotation angle being near "90[°]" so that the movable platform 1 can be smoothly raised, there is a risk that the generated torque of the punching motor 3 will not reach the upper limit value and the punching motor 3 will continue to drive when the rotation angle is near "0[°]" or "180[°]", and the components constituting the punching machine 100 will be damaged. In particular, there is a risk that when punching is performed when the rotation angle reaches near "180[°]", when the generated torque is difficult to reach the upper limit value, even if the resistance during punching increases due to paper jam or the hooking of some object, the generated torque will not reach the upper limit value, and the punching motor 3 will be driven until it reaches the set upper stop position, and the components constituting the punching machine 100 will be damaged.

[0168] On the other hand, there is a risk that when the rotation angle is near "0[°]" or "180[°]", when the upper limit of the torque generated is set to a lower value to prevent damage to the components, the force required to smoothly rise the mobile platform 1 cannot be obtained when the rotation angle is near "90[°]".

[0169] In contrast, the upper limit value of the torque generated by the punching motor 3 is changed by utilizing the rotation angle of the eccentric shaft 44. Specifically, when the rotation angle is near "90[°]", the upper limit value of the torque generated by the punching motor 3 is set to a higher value, and the setting of the upper limit value of the torque generated by the punching motor 3 is changed so that the value decreases continuously or stepwise as the rotation angle approaches "180[°]".

[0170] Furthermore, during the punching operation, when the generated torque of the press motor 3 reaches the upper limit value before reaching the upper stop position, the driving of the press motor 3 is stopped and an error display is made on a display unit such as the operation panel 101 .

[0171] In this way, the mobile platform 1 can be smoothly raised until it approaches the upper stop position by setting the upper limit value of the generated torque to a higher value. From the upper stop position, the load on the device can be reduced by changing the upper limit value of the generated torque to a lower value, thereby preventing damage to components of the punching machine 100 such as the die 8 or the lifting and transmission mechanism 4.

[0172] As a configuration for changing the upper limit of the generated torque, the following control may be performed: when the mobile platform 1 approaches the upper stop position, the upper limit of the generated torque of the punching motor 3 is reduced. When the mobile platform 1 starts to rise, the torque is most required, and as it approaches the upper stop position, the required torque becomes lower.

[0173] Since the mobile platform 1 used in the punching machine 100 of the present embodiment is very heavy (about 280 [kg]), a large torque is required for starting and accelerating it. Therefore, when the mobile platform 1 in the lower stop position starts to move, it is set in a manner that does not set an upper limit value for the torque generated by the punching motor 3 so that the maximum torque of the punching motor 3 can be applied. In addition, when approaching the upper stop position for punching, the upper limit value of the torque generated by the punching motor 3 is limited so that the force acting on the lifting transmission rod 43, the cylindrical portion 10 and the mobile platform 1 in the up and down direction through the eccentric shaft 44 does not exceed a certain value.

[0174] The punching machine 100 sandwiches and conveys the sheet S with a pair of conveyor belts ( 14 , 15 ) disposed outside the opposing range below the die 8 , that is, on the back side in the width direction.

[0175] Furthermore, the stop timing of the belt drive motor 13 is determined based on the detection result of the rear end detection sensor 25 arranged near the upstream end of the pair of conveyor belts (14, 15).

[0176] like Fig.16 As shown, the punching machine 100 includes a belt support mechanism 32 for supporting the pair of conveyor belts (14, 15). The belt support mechanism 32 includes a fixed plate 34 fixed to the inner frame 6 and a movable plate 33 movable relative to the fixed plate 34 in the up-down direction.

[0177] Fig.17 is the front view of the conveyor belt pair, Fig.17 (a) is an illustration before punching. Fig.17 (b) is an explanatory diagram of punching.

[0178] Fig.18 is the rear view of the conveyor belt pair and the moving platform. Fig.18 (a) is an illustration before punching. Fig.18 (b) is an illustration of the punching process. Fig.18 (c) is an illustration of punching.

[0179] Fig.19 is a schematic diagram of the front side of the punching machine 100, Fig.19 (a) is an explanatory diagram of the sheet S being conveyed to the punching area. Fig.19 (b) is an explanatory diagram of a state in which the movable platform 1 is raised after the sheet S is stopped in the punching area.

[0180] The lower conveyor belt 14 is mounted on a lower driving roller 140 , a plurality of lower mounting rollers 141 , and a lower tensioning roller 142 , and the upper conveyor belt 15 is mounted on an upper driving roller 150 , a plurality of upper mounting rollers 151 , and an upper tensioning roller 152 .

[0181] When the belt drive motor 13 is driven, the rotational drive is transmitted via the drive output gear 35, the drive output belt 36 and the belt drive gear 37, the upper drive roller 150 and the drive transmission gear 150a rotate, and the upper conveyor belt 15 rotates. When the drive transmission gear 150a rotates, the lower belt drive input gear 140a rotates, the coaxial lower drive roller 140 rotates, and the lower conveyor belt 14 rotates.

[0182] The lower tension roller 142 and the upper tension roller 152 apply tension to the lower conveyor belt 14 and the upper conveyor belt 15 .

[0183] The upper and lower mounting surfaces of the lower and upper conveyor belts 14 and 15 form a portion sandwiching the sheet S and are supported by the roller holding member, ie, the movable plate 33. The movable platform 1 includes a protrusion 29 protruding to the back in the width direction.

[0184] When the mobile platform 1 rises, as Fig.18 As shown in (b), the protrusion 29 contacts the lower surface of the lower curved portion of the movable plate 33. As the movable platform 1 rises, the protrusion 29 pushes the movable plate 33 upward, and the lower mounting roller 141 and the upper mounting roller 151 held by the movable plate 33 rise. In addition, the upper mounting surface of the lower conveyor belt 14 and the lower mounting surface of the upper conveyor belt 15, which sandwich the sheet S, rise together with the movable platform 1 ( Fig.17 The distance "dH" indicated by the dashed line in (b) rises) and becomes Fig.17 (b) Fig.18 (c) and Fig.19 The state shown in (b).

[0185] During the punching process, the sheet S is pushed upward by the mobile platform 1 due to the rise of the mobile platform 1, and the sheet S is clamped by the front end of the cutting blade 81 of the die 8 on the fixed platform 2 side and the surface of the (panel 9) of the mobile platform 1. And, since the mobile platform 1 will rise further, the sheet S will be punched into the shape of the cutting blade 81 of the die 8. Since the sheet S is clamped by the mobile platform 1 and the cutting blade 81, the relative position of the clamped part with respect to the mobile platform 1 is fixed. Then, when the mobile platform 1 rises further, the part of the sheet S clamped by the mobile platform 1 and the cutting blade 81 rises. At this time, when the distance in the vertical direction between the part of the sheet S clamped by the mobile platform 1 and the cutting blade 81 and the part held by the conveyor belt pair (14, 15) becomes larger, a pulling force will act on the sheet S, and there is a risk of damaging the sheet S.

[0186] In this embodiment, the upper mounting surface of the lower conveyor belt 14 and the lower mounting surface of the upper conveyor belt 15 rise in conjunction with the rise of the movable platform 1. Therefore, it is possible to prevent the position where the sheet S is clamped by the movable platform 1 and the cutting blade 81 (fixed platform 2) and the position where the conveyor belt pair (14, 15) holds the sheet S from being separated in the vertical direction. As a result, during the punching process, it is possible to prevent the pulling force from acting on the sheet S, and to prevent the sheet S from being damaged.

[0187] In addition, it is possible to prevent the sheet S pushed onto the movable platform 1 from being pulled by the fixed retaining component before contacting the cutting blade 81, thereby preventing the sheet S from deviating from the range relative to the movable platform 1 in the sheet S, and it is possible to prevent position deviation from occurring in the punched portion of the sheet S, thereby enabling punching processing with better precision.

[0188] like Fig.18 As shown, the position of the rotation axis of the lower suspension roller 141, i.e., the lower suspension roller shaft 141a, is fixed relative to the movable plate 33, and the rotation axis of the upper suspension roller 151, i.e., the upper suspension roller shaft 151a, can move in the up-down direction relative to the movable plate 33. By using the suspension roller bias spring 38 to apply force to the upper suspension roller shaft 151a toward the lower suspension roller shaft 141a, the upper suspension roller 151 abuts against the lower suspension roller 141 with the upper conveyor belt 15 and the lower conveyor belt 14 sandwiched therebetween.

[0189] The fixing plate 34 includes an upper protruding plate 34 a and a lower protruding plate 34 b protruding toward the front side, and includes a mounting belt sliding shaft 34 d connecting the upper protruding plate 34 a and the lower protruding plate 34 b.

[0190] The movable plate 33 protrudes inward and includes a sliding member 33a located between the upper protruding plate 34a and the lower protruding plate 34b. The mounting belt sliding shaft 34d penetrates the sliding member 33a. Since the sliding member 33a moves up and down along the mounting belt sliding shaft 34d, the movable plate 33 moves in the up and down direction. Between the sliding member 33a and the upper protruding plate 34a, a movable plate positioning spring 34c is included to press the sliding member 33a downward.

[0191] Before the movable platform 1 rises, the sliding member 33a pressed by the movable plate positioning spring 34c hits the lower protruding plate 34b, so the position of the movable plate 33 with the sliding member 33a relative to the fixed plate 34 is determined, and the upper and lower mounting rollers 151 and 141 held on the movable plate 33 are determined. When the movable platform 1 rises, the protruding portion 29 pushes the movable plate 33 upward, as shown in FIG. Fig.18As shown in (c), the sliding member 33a is raised and the movable plate positioning spring 34c is compressed. The position of the movable plate 33 is determined by the urging force of the movable plate positioning spring 34c and the collision with the protrusion 29.

[0192] Fig. 20 is an explanatory diagram of the punching machine 100 in conveying a sheet, Fig. 20 (a) is a schematic diagram obtained by adding the upper airflow A2 to the top view above the area where the sheet S passes. Fig. 20 (b) is a schematic diagram obtained by adding the upper airflow A2 and the lower airflow A1 to the front view of the punching machine 100. Fig. 20 (c) is a schematic diagram in which the downward airflow A1 is added to the top view below the area through which the sheet S passes.

[0193] like Fig. 20 As shown, the punching machine 100 includes a lower blower 170 and an upper blower 90, which generate airflow in a region where the sheet S held and conveyed by the conveyor belt pair (14, 15) passes.

[0194] exist Fig. 20 In FIG. 1 , the dotted line indicates the downflow A1 generated by the downflow blower 170, and the double-dotted line indicates the upflow A2 generated by the upflow blower 90. In addition, the arrow “Td” indicates the conveying direction of the sheet S, and the dotted line indicates the direction where the sheet S is located. Fig. 20 The upper position in (c).

[0195] In the lower air blower 170, the airflow generated by the lower blower 173 passes through the lower airflow ascending guide pipe 174, flows into the width direction inner end of the lower airflow horizontal guide pipe 172, and flows toward the near front side in the width direction through the gap formed by the lower airflow pipe wall portion 175. The airflow reaching the front side closer to the lower airflow pipe wall portion 175 is ejected from the lower air supply port 171 as the lower airflow A1.

[0196] Since the air flows in from the gap formed by the wall portion 175 of the downflow pipe, it becomes an airflow that flows from the inner side to the near front side in the width direction. In addition, since the air flows out from the downflow outlet 171 opened on the downstream side of the conveying direction of the downflow horizontal guide pipe 172, it becomes an airflow that flows in the conveying direction. Fig. 20 As shown in (c), the airflow becomes inclined so as to flow from the back side to the front side in the width direction with respect to the conveying direction "Td".

[0197] The sheet S that is conveyed in a state where only the end portion on the inner side in the width direction is held has the following risk: the front side in the width direction droops and contacts the panel 9 fixed to the upper surface of the movable platform 1, thereby being damaged. In the punching machine 100, a lower air flow A1 is ejected from the lower air outlet 171 toward the lower surface of the sheet S in the area through which the sheet S held and conveyed by the conveyor belt pair (14, 15) passes. An air flow that pushes the lower surface of the sheet S or an air flow layer below the sheet S can be formed. Therefore, it is possible to suppress the sheet S from contacting the components below, thereby suppressing damage to the sheet S.

[0198] In addition, the airflow flowing from the lower air outlet 171 to the punching area can be used to suppress the oncoming wind with respect to the conveyed sheet S, thereby suppressing the curling of the sheet S. Furthermore, the airflow flowing from the back side to the front side can be used to suppress the shaking of the front side of the sheet S. Therefore, it is possible to suppress the sheet S from contacting the members located above and below it due to the curling or shaking of the sheet S.

[0199] As a structure for blowing airflow to the lower surface of the sheet S being conveyed, airflow may be blown from below the pair of conveyor belts (14, 15) that hold the sheet S on the inner side in the width direction. That is, a structure that forms an airflow that pushes the lower surface of the sheet S or an airflow layer below the sheet S may be sufficient.

[0200] In the upper air blower 90, the airflow generated by the upper blower 93 passes through the upper airflow descending guide pipe 94 and flows into the upper airflow horizontal guide pipe 92. The upper airflow horizontal guide pipe 92 includes a plurality of rectifying plates 92a, and the upper part of the rectifying plates 92a in the upper airflow horizontal guide pipe 92 has a flow path through which the airflow can pass. The gas flowing into the upper airflow horizontal guide pipe 92 passes through the flow path above the rectifying plates 92a and passes between the rectifying plates 92a. During this passage, the gas is rectified into an airflow along the conveying direction "Td" and ejected from the upper air supply port 91 as the upper airflow A2.

[0201] In the punching machine 100, the upper airflow A2 is blown from the upper air outlet 91 toward the upper surface of the sheet S held and conveyed by the conveyor pair (14, 15). This forms an airflow layer above the sheet S, thereby preventing the sheet S from contacting the lower surface of the member located above.

[0202] Furthermore, the front side of the sheet S can be lifted up by the airflow from the lower blower 170 and the upper blower 90 and the posture of the sheet S can be stabilized by making it horizontal.

[0203] In the punching machine 100 of the present embodiment, in the punching process during mass production, the mobile platform 1 is configured to reciprocate between the lower stop position and the upper stop position, and is controlled so that it does not stop but moves on the way from the upper stop position to the lower stop position. Different from this, it is also possible to select a second punching control, which stops the reverse drive of the four punching motors 3 and restarts the drive of the belt drive motor 13 so that the mobile platform 1 stops at the timing when the sheet S punched out by the die 8 drops to the conveying height. In this second punching control, after the rear end of the sheet S subjected to the punching process passes above the mobile platform 1, the reverse drive of the four punching motors 3 is restarted, the mobile platform 1 is lowered to the lower stop position and stops, and prepares for the next punching action.

[0204] In the normal punching process of the punching machine 100, the finished product portion and the remaining portion of the sheet S after the punching process are not completely cut off. The reason is that there is a possibility that the finished product will fall into the device when the portion held by the holding portion such as the conveyor belt pair (14, 15) is the remaining portion, and the remaining portion may fall into the device when the portion that is the finished product is held. Therefore, the cutting edge 81 of the die 8 is shaped in a way that leaves a narrow connecting line called a "nick" connecting the finished product and the remaining portion. And, by pressing off the remaining portion with a separator, the nick is cut off to obtain a finished product. In contrast, even if the finished product and the remaining portion are completely cut off during the punching process by performing the second punching control, the upper surface of the movable platform 1 (the upper surface of the panel 9) supports the lower surface of the sheet S, thereby preventing the portion not held by the remaining portion or the holding portion in the finished product from falling into the device, thereby allowing the finished product and the remaining portion to be discharged to the outside of the punching machine 100 without leaving a mark. As a result, there is no need to cut off the remaining mark of the discharged sheet S, thereby preventing the remaining mark from being left on the finished product, thereby improving the quality of the finished product.

[0205] Examples of the sheet-like workpiece, i.e., sheet material S, include paper media such as plain paper, hard paper, label paper, thick paper, and coated paper. In addition, the sheet-like workpiece to be processed by the punching device of the present invention includes, in addition to paper media, OHP sheets, films, cloths, resin sheets, metal sheets, electronic circuit board materials subjected to metal foil or plating treatment, special films, plastic films, prepregs, sheets for electronic circuit boards, etc., and may be in the form of a bundle of overlapping sheets or a single sheet.

[0206] Although the configuration in which the mobile platform is arranged at the bottom and the fixed platform is arranged at the top is described, the mobile platform may be arranged at the top and the fixed platform may be arranged at the bottom. Furthermore, as a mobile platform capable of moving both of the two platforms facing each other up and down, a configuration in which a plurality (four) lifting drive sources are used to make them contact / separate may also be provided.

[0207] In the configuration where the movable platform is arranged at the bottom and the fixed platform is arranged at the top as in the present embodiment, four punching motors 3 and four lifting and transferring mechanisms 4 having a certain degree of weight can be arranged at a lower position of the device, thereby lowering the center of gravity of the punching machine 100.

[0208] The above description is only an example, and each of the following solutions will have a unique effect.

[0209] [Scheme 1]

[0210] A punching device such as a punching machine 100 includes a mobile platform such as a mobile platform 1 and a relative platform such as a fixed platform 2 arranged relatively to each other in the upper and lower directions, a moving mechanism, and a control component such as a control unit 30. The moving mechanism moves the mobile platform up and down toward the relative platform. The control component controls the moving mechanism. The moving mechanism makes the mobile platform approach the relative platform, thereby using a die such as a die 8 installed on at least one of the mobile platform and the relative platform to punch a workpiece such as a sheet S into a predetermined shape. The punching device is characterized in that the moving mechanism has a plurality of (four or more) lifting and transferring mechanisms 4 and other pressurizing mechanisms, and a plurality of (four or more) punching motors 3 and other driving sources. The plurality of pressurizing mechanisms use a plurality of (four or more) cylindrical parts 10 and other pressurizing parts with different horizontal positions to pressurize the mobile platform toward the relative platform respectively, and the plurality of driving sources drive the plurality of pressurizing mechanisms respectively.

[0211] According to this, the control means can independently adjust the pressurization amounts in the plurality of pressurizing units by independently controlling the plurality of drive sources, thereby enabling the punching pressure to be adjusted while suppressing the unevenness of the punching pressure without providing a drive source dedicated to the punching pressure adjustment.

[0212] [Scheme 2]

[0213] The feature of the second embodiment is that, in the punching device of the first embodiment, the pressurizing mechanism is an eccentric rotating body drive transmission mechanism that converts the rotational motion of the driving source into the up-and-down motion of the moving platform by using an eccentric rotating body such as the eccentric shaft 44 .

[0214] When a ball screw is also used as a pressurizing mechanism for pressurizing and moving the movable platform, the amount of movement of the movable platform relative to the amount of rotation output by the driving source is constant.

[0215] In contrast, in the eccentric rotating body drive transmission mechanism, the moving speed of the moving platform in the moving range that does not contribute to punching can be increased while finely adjusting the pressure during punching. This is for the following reason.

[0216] That is, when the position of the pressurizing portion is near the middle between the bottom dead center and the top dead center (for example, Fig.11 In the state (b) of the embodiment, the displacement in the up-down direction relative to the rotation amount will become larger, so the moving speed of the moving platform in the moving range that does not contribute to punching can be increased by setting this range as the moving range of the moving platform in a state that does not contribute to punching. On the other hand, because the displacement in the up-down direction relative to the rotation amount will become smaller when the position of the pressurizing part is near the top dead center or the bottom dead center, the displacement in the up-down direction relative to the rotation amount can be reduced by setting the stop position of the pressurizing part during pressurization, such as the upper stop position, to a position close to the top dead center or the bottom dead center, and the stop position of the pressurizing part during pressurization can be finely set, thereby making it possible to finely adjust the pressure during punching.

[0217] [Scheme 3]

[0218] Scheme 3 is characterized in that, in the punching device of Scheme 2, during a pressurizing action such as an ascending action in which the pressurizing mechanism pressurizes the movable platform toward the relative platform, the pressurizing portion moves to a stop position such as an upper stop position that has not reached a stop point such as the upper dead point of the eccentric rotating body drive transmission mechanism.

[0219] In the present embodiment, the eccentric rotating body does not rotate only once, and the pressurizing part is displaced within the range sandwiched between the upper dead point and the lower dead point. Furthermore, as described in the above embodiment, when pressurizing is performed by raising the movable platform toward the relative platform arranged above, the pressurizing part is displaced to an upper stop position set at a position lower than the upper dead point. Furthermore, unlike the above embodiment, when pressurizing is performed by lowering the movable platform toward the relative platform arranged below, the pressurizing part is displaced to a lower stop position set at a position higher than the lower dead point. By setting the stop position of the pressurizing part during pressurization to a position that does not reach the dead point, the stop position of the pressurizing part during pressurization can be adjusted in the up-down direction, and by adjusting the stop position of the pressurizing part during pressurization for each of the plurality of pressurizing mechanisms, the punching pressure can be adjusted to eliminate uneven cutting.

[0220] [Solution 4]

[0221] Scheme 4 is characterized in that, in any one of the punching devices of Scheme 2 or 3, the control component performs torque limitation to limit the torque generated when the driving source is driven, and changes the upper limit value of the generated torque by utilizing the rotation position of the eccentric rotating body such as the rotation angle of the eccentric shaft 44 when the cylindrical portion 10 is set to θ=0[°] when the cylindrical portion 10 is at the bottom dead point.

[0222] Accordingly, when the amount of movement of the movable platform relative to the rotation angle of the eccentric rotating body is large, the torque required to move the movable platform can be maintained, and when the amount of movement of the movable platform relative to the rotation angle of the eccentric rotating body is small, damage to the components constituting the punching device can be prevented.

[0223] [Solution 5]

[0224] A fifth aspect is characterized in that, in any one of the punching devices of the first to fourth aspects, the pressurizing parts are arranged to be located at respective vertices of a rectangle included in the range of the movable stage.

[0225] In Patent Document 1, only the punching pressure in the front-to-back direction can be adjusted relative to the conveying direction of the sheet, and the punching pressure in the left-to-right direction cannot be adjusted relative to the conveying direction of the sheet. By arranging the pressurizing parts at four positions of the vertices of the rectangle included in the range of the moving platform as in the present solution, and independently controlling the driving source of the pressurizing mechanism of each pressurizing part by the control part, it is possible to adjust not only the punching pressure in the front-to-back direction relative to the conveying direction of the sheet, but also the punching pressure in the left-to-right direction, thereby eliminating uneven cutting more appropriately.

[0226] [Solution 6]

[0227] Scheme 6 is characterized in that, in any one of the punching devices of Schemes 1 to 5, a deformation measuring component such as a plurality of strain sensors 26 is provided at positions different from each other in the horizontal direction, and the deformation measuring component measures the deformation of components (such as the near frame 5 and the inner frame 6) that are deformed when the pressurizing mechanism is pressurized, and the control component controls the driving of the driving source based on the measurement result of the deformation measuring component.

[0228] According to this, the reduction of the punching pressure caused by the deformation of the member deformed during the pressurization can be corrected by the control of the control member, so that the operation burden of adjusting the punching pressure can be reduced. In the above embodiment, the member measuring the deformation amount in the deformation amount measuring member is the near frame 5 and the inner frame 6, but the member measuring the deformation amount is not limited to this. For example, it is also possible to measure the shortening amount of the shaft holding part 42 of each of the four lifting and transmitting mechanisms 4 during the pressurization, and control the driving amount of the punching motor 3 based on the shortening amount. Furthermore, it is also possible to measure both the shortening amount of the shaft holding part 42 during the pressurization and the elongation amount of the near frame 5 and the inner frame 6, and control the driving amount of the punching motor 3 based on the measurement result. The relative platform holding member that holds the relative platform like the near frame 5 and the inner frame 6, and the mobile platform holding member that holds the mobile platform like the member constituting the lifting and transmitting mechanism 4 such as the shaft holding part 42 are members that can be deformed due to stress when pressurized. Furthermore, not limited to these members, any member that deforms when pressurized can be used to correct a reduction in punching pressure due to deformation during pressurization by measuring the amount of deformation and controlling the drive source based on the measurement result.

[0229] [Solution 7]

[0230] Scheme 7 is characterized in that, in the punching device of Scheme 6, the deformation measuring component is an elongation measuring component such as a strain sensor 26, which measures the elongation in the up and down direction of the holding components such as the near frame 5 and the inner frame 6 that hold the relative platform.

[0231] According to this, it is possible to correct the decrease in the punching pressure due to the extension of the holding member during pressurization.

[0232] [Scheme 8]

[0233] The feature of the scheme 8 is that in any one of the punching devices of the schemes 1 to 7, there are conveying components such as a lower conveyor belt 14 and an upper conveyor belt 15 between the movable platform and the relative platform for conveying the workpiece in and out.

[0234] Based on this, the following adjustment can be made: in a punching device that automates the transfer of the workpiece to and from the punching device, no drive source dedicated to adjusting the punching pressure is provided, but the uneven punching pressure is suppressed by driving and controlling multiple drive sources that move the movable platform up and down.

[0235] [Solution 9]

[0236] A ninth aspect is characterized in that, in any one of the punching devices of the first to eighth aspects, the counter platform is an upper fixed platform which is above the movable platform and fixed to the housing of the device.

[0237] According to this, by arranging the movable platform at the bottom, the pressurizing mechanism or the driving source constituting the movable mechanism can be arranged at a lower position in the device, and since the center of gravity of the device can be lowered, the punching device can be stably installed.

[0238] [Scheme 10]

[0239] Scheme 10 is characterized in that, in any one of the punching devices of Schemes 1 to 9, the settings of the punching process, such as the setting of the upper reference rotation position of the four punching motors 3, are changed based on the identification information of the installed die and the control information associated with the identification information (such as the information of the upper reference rotation position of the four punching motors 3 when the die 8 was last installed).

[0240] This can reduce the operational burden during adjustment before mass production, thereby shortening the setup time.

[0241] [Scheme 11]

[0242] The punching device (100) comprises a movable platform (1) and a relative platform (2) arranged relative to each other, a moving mechanism (3, 4) for moving the movable platform toward the relative platform, a punching area conveying component (14, 15) for conveying a workpiece (S) to a punching area sandwiched between the movable platform and the relative platform, and a holding component (14, 15) for holding the workpiece located in the punching area; the punching device (100) is characterized in that it comprises a holding component moving mechanism (29, 33) for moving the holding component toward one side (upper) of the relative platform according to the movement of the movable platform toward the relative platform.

[0243] According to this, it is possible to suppress the position change of the moving platform relative to the holding member.

[0244] The structure for moving the holding member according to the movement of the mobile platform is not limited to the structure for interlocking the holding member using a common driving source, and may also be a structure for moving the holding member toward the side of the relative platform according to the movement of the mobile platform using a separately provided driving source. In addition, it may also be a structure in which the mobile platform is located above the relative platform, and the holding member is lowered according to the lowering of the mobile platform during the punching process. Furthermore, it may also be a structure in which a plurality of clippers are arranged on the endless chain as described in Patent Document 1 as a mechanism that functions as a punching area conveying member and a holding member, and the clippers are moved according to the movement of the mobile platform toward the relative platform during the punching process.

[0245] [Scheme 12]

[0246] Scheme 12 is characterized in that, in the punching device of Scheme 11, the holding part moving mechanism has a pressing part (29) that moves together with the moving platform, and a pressed part (33) that moves together with the holding part, and when the moving platform moves toward the relative platform, the pressing part presses the pressed part, and the holding part moves toward the relative platform side.

[0247] According to this, it is possible to realize a configuration in which the holding member moves toward the opposing stage side in conjunction with the moving stage.

[0248] [Scheme 13]

[0249] Scheme 13 is characterized in that, in the punching device of Scheme 12, the pressing portion does not contact the pressed portion when the moving platform starts to move toward the relative platform, but contacts and presses the pressed portion during the movement of the moving platform toward the relative platform.

[0250] [Scheme 14]

[0251] Scheme 14 is characterized in that, in any one of the punching devices of Schemes 11 to 13, the punching area conveying component is a belt conveying device that clamps and conveys the workpiece with two belt members (14, 15), the two belt members are located on the outside of the movable platform relative to the width direction, and have the function of serving as a holding component by clamping and holding the portion of the workpiece extending from the punching area in the punching area, and the holding component moving mechanism is a mechanism that moves toward the relative platform side according to the movement of the movable platform toward the relative platform according to the portion of the workpiece clamped by the two belt members.

[0252] According to this, in a configuration in which two belt members arranged to avoid the punching area sandwich and convey the workpiece, the portion of the workpiece sandwiched between the two belt members can be moved toward the opposing stage side according to the movement of the movable stage.

[0253] [Scheme 15]

[0254] A punching device (100) comprises a movable platform (1) and a relative platform (2) arranged relative to each other in the up-down direction, a moving mechanism (3, 4) for moving the movable platform toward the relative platform, and a holding and conveying component (14, 15) for moving a holding portion (with a surface) holding one end of a sheet-like workpiece (S) so as to convey the workpiece to a punching area sandwiched between the movable platform and the relative platform. The punching device (100) is characterized in that it comprises an airflow generating component (170, 90) for generating an airflow (A1, A2) in an area through which the workpiece held and conveyed by the holding and conveying component passes.

[0255] This can prevent the workpiece being conveyed from coming into contact with a member located below or above.

[0256] The present invention is also applicable to a configuration in which a plurality of clamps are arranged on an endless chain as described in Patent Document 1 as the holding and conveying member. That is, the present invention is applicable to any configuration in which one end of a sheet-like workpiece is held and conveyed by the holding and conveying member.

[0257] [Scheme 16]

[0258] Scheme 16 is characterized in that, in the punching device of Scheme 15, the holding and conveying component is a belt conveying device that clamps and conveys the workpiece with two belt members (14, 15), and the two belt members are located on the outside of the movable platform relative to the width direction, clamping and holding the part extending from the punching area in the workpiece located in the punching area.

[0259] According to this, in a configuration in which two belt members arranged to avoid the punching region sandwich and convey one end of a thin sheet-like workpiece, it is possible to suppress the workpiece being conveyed from contacting a member located below or above.

[0260] [Scheme 17]

[0261] The feature of the seventeenth embodiment is that, in the punching device of the sixteenth embodiment, the airflow generating member is located upstream of the punching area in the conveying direction, so as to generate an airflow toward the punching area.

[0262] [Scheme 18]

[0263] Scheme 18 is characterized in that, in any one of the punching devices of Schemes 15 to 17, the airflow generating component (70) includes a lower airflow outlet (71), which ejects airflow toward a position lower than the area through which the workpiece held and conveyed by the conveying component passes.

[0264] [Scheme 19]

[0265] Scheme 19 is characterized in that, in the punching device of scheme 18, the airflow generating member generates an airflow (A1) flowing from one end side to the other end side of the workpiece held by the holding and conveying member as an airflow ejected from the lower airflow ejection port.

[0266] [Scheme 20]

[0267] Scheme 20 is characterized in that, in any one of the punching devices of Schemes 15 to 19, the airflow generating component (90) includes an upper airflow nozzle (91), which ejects airflow toward a position above the area through which the workpiece held and conveyed by the conveying component passes.

[0268] [Scheme 21]

[0269] The feature of claim 21 is that, in the punching device of claim 20 including at least the configuration of claim 16, the airflow generating means generates an airflow flowing from the upstream side to the downstream side in the conveying direction as the airflow ejected from the upper airflow ejection port.

[0270] [Explanation of Reference Numerals]

[0271] 1: Mobile Platform

[0272] 2: Fixed platform

[0273] 3: Stamping motor

[0274] 3a: First stamping motor

[0275] 4: Lifting and transmission mechanism

[0276] 4a: First lifting transmission mechanism

[0277] 5: Near front frame

[0278] 6: Inner frame

[0279] 7: Bench frame

[0280] 8: Die

[0281] 9: Panel

[0282] 10: Cylindrical part

[0283] 10a: First cylindrical part

Claims

1. A punching device, comprising: The moving platform and the relative platform are arranged relative to each other in the up-down direction. a moving mechanism, which moves the moving platform up and down toward the relative platform, and A control component, which controls the above-mentioned moving mechanism; The moving mechanism performs a punching process by bringing the moving platform close to the opposing platform, wherein the punching process punches the workpiece into a predetermined shape using a punching die installed on at least one of the moving platform and the opposing platform; The punching device is characterized in that The moving mechanism comprises: a plurality of pressurizing mechanisms, which respectively pressurize the moving platform toward the opposing platform using a plurality of pressurizing parts at different positions in the horizontal direction; and A plurality of driving sources, each of which drives the plurality of the above-mentioned pressurizing mechanisms, The pressurizing mechanism is an eccentric rotating body drive transmission mechanism that utilizes an eccentric rotating body to convert the rotational motion of each of the driving sources into the up-and-down motion of the pressurizing part. The mobile platform is arranged below the relative platform. In the punching process, the control unit is configured to rotate each of the plurality of driving sources from a lower reference rotation position to an upper reference rotation position, thereby causing the plurality of pressing parts to move from a lower stop position of the pressing part to an upper stop position of the pressing part, and causing the movable platform to move from a lower stop position to an upper stop position, thereby punching the workpiece clamped by the movable platform and the relative platform into a shape corresponding to the punching die. The control component controls the driving source so that the eccentric rotating body is not rotated once, but the pressure part is moved back and forth between the lower stop position of the pressure part and the upper stop position of the pressure part, wherein the upper stop position of the pressure part is a position lower than the top dead center of the eccentric rotating body drive transmission mechanism. By setting the upper reference rotation position corresponding to the upper stop position of the pressurizing part for each of the driving sources, the height of the upper stop position of the pressurizing part can be changed for each of the pressurizing parts.

2. The punching device according to claim 1, characterized in that: Also includes An adjustment operation input unit is configured to input an adjustment value of the upper reference rotation position of the drive source.

3. The punching device according to claim 1 or 2, characterized in that: The control means performs torque limitation for limiting a torque generated when the driving source is driven, and changes an upper limit value of the generated torque according to a rotational position of the eccentric rotating body.

4. The punching device according to any one of claims 1 to 3, characterized in that: The pressurizing parts are arranged to be located at respective vertices of a rectangle included in the range of the moving platform.

5. The punching device according to any one of claims 1 to 3, characterized in that: A plurality of deformation amount measuring components are provided at positions different from each other in the horizontal direction, and the deformation amount measuring components measure the deformation amount of the member deformed when the pressure mechanism applies pressure; The control unit controls the driving of the driving source based on the measurement result of the deformation amount measuring unit.

6. The punching device according to claim 5, characterized in that The deformation amount measuring means is an elongation measuring means for measuring an elongation in a vertical direction of a holding member holding the opposing platform.

7. The punching device according to any one of claims 1 to 3, characterized in that: A conveying component for transferring the processed object into and out of the processing unit is provided between the moving platform and the relative platform.

8. The punching device according to any one of claims 1 to 3, characterized in that: The relative platform is an upper fixed platform fixed to the housing of the device.

9. The punching device according to any one of claims 1 to 3, characterized in that: The setting of the punching process is changed based on the identification information of the mounted die and the control information associated with the identification information.

10. The punching device according to claim 9, characterized in that: The control information includes information on the upper reference rotation position set for each of the driving sources when the die was last mounted.

11. The punching device according to any one of claims 1 to 3, characterized in that: Also includes an identification information acquisition component that acquires identification information of the installed die, and an identifier reading component for reading an identifier assigned to the workpiece, Before the punching process is performed, whether the workpiece and the punching die are properly combined is confirmed based on the information acquired by the identifier reading means and the identification information of the punching die.

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