JP2022073315A - Punching device - Google Patents

Abstract

To prevent a workpiece being held and conveyed with its one end held, from coming into contact with a member located below or above the workpiece.SOLUTION: A die cutter including: a moving base plate 1 and a fixed base plate 2 disposed opposed to each other in a vertical direction; a moving mechanism that vertically moves the moving base plate 1 toward the fixed base plate 2; and a pair of conveying belts (14, 15) that conveys a sheet material S to a punching area sandwiched between the moving base plate 1 and the fixed base plate 2, by moving belt surfaces holding side edges of the sheet material S, includes a lower blower 70 and an upper blower 90 that generate a lower air flow A1 and an upper air flow A2 in an area where the sheet material S held and conveyed by the pair of conveying belts (14, 15) passes.SELECTED DRAWING: Figure 10

Description

The present invention relates to a punching device.

Conventionally, a moving surface plate and a facing surface plate arranged to face each other in the vertical direction, a moving mechanism for moving the moving surface plate up and down toward the facing surface plate, and a holding portion for holding one end of a sheet-shaped workpiece are provided. A flat plate punching device including a moving surface plate and a holding and transporting means for transporting a work piece to a punching region sandwiched by the opposed surface plate is known. In this type of punching device, the work piece is transported to the punching area, and the moving surface plate is brought closer to the facing surface plate, so that the work piece is punched by one of the moving surface plate and the facing surface plate. Is punched into a predetermined shape.

As a flat board punching device, Patent Document 1 describes a configuration including a holding and transporting means in which a plurality of holding portions called grippers are arranged on an endless chain. In this punching device, the sheet is conveyed by gripping the tip of the sheet, which is the workpiece, with a gripper and rotating the endless chain. In the configuration in which the tip of the sheet is gripped and conveyed by the gripper in this way, the gripper is stopped immediately after passing through the punching region, and the moving surface plate is moved toward the facing surface plate. As a result, the sheet gripped by the gripper can be stopped in the punching region and punched into a predetermined shape.

Patent No. 5399231 Japanese Unexamined Patent Publication No. 2017-21369

In the holding and transporting means for holding and transporting only the tip of the sheet-shaped workpiece by the holding portion as in Patent Document 1, the rear end side of the workpiece hangs down and the workpiece being transported moves downward. There is a risk of contact with the board.
As the holding and transporting means, as in the sheet material transporting mechanism described in Patent Document 2, two belt members are provided at one end in the width direction, and the contact portion between the two belt members is in the width direction of the workpiece. There is a device that holds one end by sandwiching it and conveys the workpiece by rotating the belt. When the holding and transporting means of Patent Document 2 is used as the holding and transporting means of the flat plate punching device including the moving surface plate and the fixed surface plate, the other end side in the width direction which is not held by the holding and transporting means hangs down and is conveyed. The other end of the workpiece inside may come into contact with the lower moving surface plate. If the widthwise end of the workpiece being transported comes into contact with the moving surface plate, the workpiece may be caught on the moving surface plate and the workpiece may be damaged.
In this way, with the configuration in which only one end of the sheet-shaped workpiece is held and conveyed, the problem that the workpiece comes into contact with the member of the punching device is that the other end hangs down and comes into contact with the member located below. Not limited to cases. For example, the other end side of the workpiece being conveyed, which is not held, may be lifted, and the workpiece may come into contact with a member located above.

In order to solve the above-mentioned problems, the present invention comprises a moving surface plate and a facing surface plate arranged to face each other in the vertical direction, a moving mechanism for moving the moving surface plate up and down toward the facing surface plate, and a sheet shape. In a punching device provided with a holding and transporting means for moving a holding portion that holds one end of the workpiece and transporting the workpiece to a punching region sandwiched between the moving surface plate and the opposed surface plate. It is characterized by comprising an airflow generating means for generating an airflow in a region through which the workpiece to be held and conveyed by the holding and transporting means passes.

According to the present invention, it is possible to suppress hanging or lifting of the other end side of the workpiece that is not held by the holding and transporting means, and to prevent the workpiece being conveyed from coming into contact with a member located below or above. , Has an excellent effect.

Schematic perspective of the die-cut system. Front view of the die cutter. Upstream side view of the die cutter. Downstream side view of the die cutter. Front view of the die cutter with the front frame and the back frame hidden. Rear view of the die cutter with the front frame and the back frame hidden. A perspective view of a die cutter that hides the front frame and the back frame. Schematic diagram of the upstream side surface of the die cutter. Schematic diagram of the front of the die cutter. Explanatory drawing of the die cutter during transporting a sheet material. Block diagram of the die cutter. Schematic diagram of the elevating transmission mechanism. Explanatory drawing which shows the displacement between the elevating transmission rod and the cylinder part when the elevating transmission mechanism is driven so that the cylinder part moves from the bottom dead center to the top dead center.

Hereinafter, the same or equivalent components and members shown in the drawings shall be designated by the same reference numerals, and duplicate description thereof will be omitted as appropriate. Further, the dimensions of the members in each drawing are shown in an appropriately enlarged or reduced size for easy understanding. In addition, some of the members that are not important for explaining the embodiment in each drawing are omitted and displayed.

Hereinafter, an embodiment of a punching device according to the present invention and a punching processing system provided with the punching device will be described.

FIG. 1 is a schematic perspective view of a die-cut system 500, which is a punching processing system according to the present embodiment.
The die-cut system 500 includes a sheet feeder 200, a resist device 300, a die cutter 100, and an discharge processing device 400 from the upstream side in the transport direction of the sheet material to be a workpiece.

In the die-cut system 500, the sheet feeder 200, which is a work piece supply means, supplies the sheet material placed on the mounting shelf to the resist device 300. The resist device 300, which is a work piece position correction means, has an inclination of the sheet material with respect to a direction parallel to the transport direction of the sheet material (X-axis direction in the figure) and a sheet material in the width direction (Y-axis direction in the figure). The position of the sheet material is adjusted, and the sheet material is conveyed toward the die cutter 100. The die cutter 100, which is a punching device, temporarily stops the sheet material supplied from the resist device 300, and sandwiches the sheet material between the fixed surface plate and the moving surface plate, which will be described in detail later, so that the sheet material is attached to the fixed surface plate. Performs punching processing to punch into the shape of the punch. The discharge processing device 400 includes a discharge unit that receives the sheet material that has been punched by the die cutter 100 and discharged, a separator that separates the sheet material that has been punched into a product and a surplus portion. It is equipped with a stacker that collects separated deliverables.
As shown in FIG. 1, the die cutter 100 includes an operation panel 101 on the upper surface thereof.

Next, the die cutter 100 will be described.
2 to 7 are explanatory views of the die cutter 100 with the exterior cover removed. FIG. 2 is a front view of the die cutter 100. FIG. 3 is an upstream side view of the die cutter 100 seen from the right side in FIG. 2, and FIG. 4 is a downstream side view of the die cutter 100 seen from the left side in FIG. 2. FIG. 5 is a front view of the die cutter 100 in which the front frame 5 and the back frame 6 are hidden from the front view of FIG. 2, and FIG. 6 shows the front frame 5 and the back frame 6 in the state shown in FIG. Is a rear view of the die cutter 100 in which is hidden. Further, FIG. 7 is a perspective view of the die cutter 100 in which the front frame 5 and the back frame 6 are hidden.
FIG. 8 is an explanatory view schematically showing an upstream side view of the die cutter 100 shown in FIG.

As shown in FIGS. 2 to 7, the die cutter 100 is arranged so as to face the moving surface plate 1 that can move up and down with respect to the frame (5, 6, 7, etc.) of the apparatus and above the moving surface plate 1. A fixed surface plate 2 fixed to the frame of the apparatus is provided.
The die cutter 100 includes a gantry frame 7, a front frame 5, a back frame 6, an upstream guide frame 21, and a downstream guide frame 23 as a metal frame structure. The gantry frame 7 has casters for movement and a movement prevention fixing mechanism. The front frame 5 and the back frame 6 are plate-shaped members, and the lower portions thereof are fixed to the gantry frame 7. The upstream guide frame 21 and the downstream guide frame 23 are square bar-shaped members extending in the width direction of the device and having both ends fixed to the front frame 5 and the back frame 6.
The fixed surface plate 2 is fixed to the upper part of the front frame 5 and the back frame 6. Further, as shown in FIG. 8, the die 8 having the cutting blade 81 is fixed to the lower surface of the fixed surface plate 2 with the stainless plate 82 interposed therebetween. On the other hand, the face plate 9 is fixed to the upper surface of the moving surface plate 1.

The die cutter 100 includes four elevating transmission mechanisms 4 (4a, 4b, 4c, 4d) and four press motors 3 (3a, 3b, 3c, 3d) as a moving mechanism for moving the moving surface plate 1 up and down. Be prepared. Four columnar portions 10 (10a, 10b, 10c, 10d) whose axial direction is parallel to the transport direction are fixed to the lower portion of the moving surface plate 1. The elevating transmission mechanism 4 has a structure of a crank mechanism that converts the input rotational motion into a reciprocating motion in the vertical direction, the press motor 3 is rotationally driven, and the elevating transmission mechanism 4 transmits the elevating motion to the cylindrical portion 10. Then, the moving platen 1 moves in the vertical direction.
2 to 7 show a state in which all four cylindrical portions 10 are located at the bottom dead center of the elevating transmission mechanism 4, and the moving surface plate 1 is the most from the fixed surface plate 2 within the movable range of the moving surface plate 1. It is explanatory drawing of the separated state.
FIG. 8 is an explanatory view of a state in which the moving surface plate 1 rises to the upper stop position and the sheet material S is punched out by the cutting blade 81 of the die 8.

As shown in FIG. 3, the mobile surface plate 1 is provided with an upstream guided shaft 11 projecting to the upstream side in the transport direction in parallel with the X axis in the figure at the center in the width direction of the surface on the upstream side in the transport direction. .. Further, as shown in FIG. 4, the moving surface plate 1 is a downstream guided shaft 12 protruding toward the downstream side in the transport direction in parallel with the X axis in the figure at the center in the width direction of the surface on the downstream side in the transport direction. To prepare for. The upstream side guided shaft 11 and the downstream side guided shaft 12 are provided with an upstream side guided bearing 11a and a downstream side guided bearing 12a.

As shown in FIG. 3, an upstream guide portion 22 is provided at the center portion in the width direction of the upstream guide frame 21. The upstream side guide portion 22 is provided with two upstream side guide rails 22a protruding to the downstream side in the transport direction and extending in the vertical direction so as to sandwich the upstream side guided bearing 11a between the two upstream side guide rails 22a. By engaging, the movement of the upstream guided shaft 11 in the width direction is restricted.
Further, as shown in FIG. 4, a downstream guide portion 24 is provided at the central portion of the downstream guide frame 23 in the width direction. The downstream guide portion 24 includes two downstream guide rails 24a protruding upstream in the transport direction and extending in the vertical direction so as to sandwich the downstream guided bearing 12a between the two downstream guide rails 24a. By engaging, the movement of the downstream guided shaft 12 in the width direction is restricted.
By restricting the movement of the upstream side guided shaft 11 and the downstream side guided shaft 12 in the width direction by the upstream side guide portion 22 and the downstream side guide portion 24, the moving surface plate 1 when the moving surface plate 1 moves up and down Can prevent displacement in the width direction of.

The die cutter 100 is arranged on the back side in the width direction with respect to the inlet roller pair 20 for transporting the sheet material S supplied from the resist device 300 toward the inside of the device and the moving surface plate 1, and transports the sheet material S. A pair of transport belts (14, 15) to be provided. Further, it includes a transport drive motor 13 which is a drive source for the inlet roller pair 20 and the transport belt pair, and a transport drive transmission mechanism 16 for transmitting the driving force. The inlet roller pair 20 includes an inlet drive roller 20a and an inlet driven roller 20b. By driving the transfer drive motor 13, the inlet drive roller 20a, the lower transfer belt 14, and the upper transfer belt 15 move endlessly at the same surface movement speed. As a result, the inlet roller pair 20 sandwiches a plurality of locations in the width direction of the sheet material S and conveys the sheet material S toward the transfer belt pair (14, 15). Further, the lower transport belt 14 and the upper transport belt 15 sandwich one end of the sheet material S in the width direction (the back side of the device), and the belt surface of the sandwiched portion moves to transport the sheet material S. do.

As shown in FIG. 8, the die cutter 100 includes a belt support mechanism 32 that supports a pair of transport belts (14, 15). The belt support mechanism 32 includes a fixed plate 34 fixed to the back frame 6 and a movable plate 33 that can move up and down with respect to the fixed plate 34.

FIG. 9 is a schematic view of the front of the die cutter 100. FIG. 9A is an explanatory diagram during transportation of the sheet material S toward the punching region, and FIG. 9B shows the moving surface plate 1 ascending after stopping the sheet material S in the punching region. It is explanatory drawing of the state which made it made.
FIG. 10 is an explanatory diagram of the die cutter 100 during transportation of the sheet material S. FIG. 10A is a schematic view in which the upper airflow A2, which will be described later, is added to the plan view of the plane above the region through which the sheet material S passes. FIG. 10B is a schematic view in which the upper airflow A2 and the lower airflow A1 described in detail are added to the front view of the die cutter 100. FIG. 10 (c) is a schematic view in which the lower airflow A1 described in detail is added to the plan view in the plane below the region through which the sheet material S passes.

The lower transport belt 14 is stretched on a lower drive roller 140, a plurality of underlaying rollers 141, and a lower tension roller 142. The upper transport belt 15 is stretched on the upper drive roller 150, a plurality of upper tension rollers 151, and the upper tension roller 152.

When the transfer drive motor 13 is driven, the drive is transmitted by the transfer drive transmission mechanism 16, the upper drive roller 150 and the lower drive roller 140 rotate, and the upper transfer belt 15 and the lower transfer belt 14 rotate.

As shown in FIG. 9A, the plurality of underlaying rollers 141 and the plurality of overhanging rollers 151 are located between the upper upholstery surface of the lower transport belt 14 and the lower upholstery surface of the upper transport belt 15. The path between the lower transport belt 14 and the upper transport belt 15 is defined so that the surface sandwiching the sheet material S is formed horizontally. As shown in FIG. 8, the underlaying roller 141 and the overhanging roller 151 forming the surface sandwiching the sheet material S are supported by a movable plate 33 which is a roller holding member that can move up and down. The moving surface plate 1 includes a protruding portion 29 protruding to the back side in the width direction.

When performing the punching process, the sheet material S is conveyed between the moving surface plate 1 and the fixed surface plate 2 by the conveying belts (14 and 15), and the lower conveying belt 14 and the upper conveying belt 15 are stopped. Then, the moving surface plate 1 is raised.
When the moving surface plate 1 rises, the protruding portion 29 comes into contact with the lower end portion of the movable plate 33, and further, when the moving surface plate 1 rises, the protruding portion 29 pushes up the movable plate 33 and is held by the movable plate 33. The lower tension roller 141 and the upper tension roller 151 are raised. Then, as shown in FIG. 9B, the portion stretched on the lower tension roller 141 on the upper tension surface of the lower transport belt 14 and the upper tension roller 151 on the lower tension surface of the upper transport belt 15 The portion stretched on the belt rises together with the moving surface plate 1. As a result, the portion sandwiching the sheet material S between the upper tensioning surface of the lower transport belt 14 and the lower tensioning surface of the upper transport belt 15 rises together with the moving surface plate 1, and the portion is raised together with the moving surface plate 1. , The sheet material S to be processed can be raised toward the fixed surface plate 2.

As shown in FIG. 8, the fixing plate 34 includes an upper protruding plate 34a and a lower protruding plate 34b protruding toward the front side, connecting the upper protruding plate 34a and the lower protruding plate 34b, and a tension belt slide shaft extending in the vertical direction. To prepare for.
The movable plate 33 protrudes to the back side and includes a slide member 33a located between the upper protruding plate 34a and the lower protruding plate 34b. The slide member 33a is provided with a through hole through which the tension belt slide shaft is passed, and the movable plate 33 moves in the vertical direction when the slide member 33a moves up and down along the tension belt slide shaft. A movable plate positioning spring is provided between the upper surface of the slide member 33a and the lower surface of the upper protruding plate 34a to press the slide member 33a downward.

Before the moving surface plate 1 rises, the protruding portion 29 does not push up the movable plate 33, and the slide member 33a pushed down by the movable plate positioning spring abuts on the upper surface of the lower protruding plate 34b. By this abutting, the movable plate 33 having the slide member 33a can be positioned with respect to the fixed plate 34, and the upper tension roller 151 and the lower tension roller 141 held by the movable plate 33 can be positioned in the vertical direction. When the moving surface plate 1 rises and the protruding portion 29 pushes up the movable plate 33, the slide member 33a rises and the movable plate positioning spring is in a compressed state. In this state, the movable plate 33 urged by the movable plate positioning spring comes into contact with the protrusion 29, the movable plate 33 can be positioned, and the upper tension roller 151 and the lower tension roller 141 can be positioned in the vertical direction. can.

As a configuration for moving the sheet material S sandwiched between the transport belt pairs (14, 15) in the vertical direction, the transport belt pair (14, 15) including the transport drive mechanism (convey drive motor 13, transport drive transmission mechanism 16) is included. ) May be held by a holding unit that can move up and down. In this case, the protrusion 29 of the moving surface plate 1 pushes up the holding unit that holds the transport belt pair including the transport drive mechanism.

FIG. 12 is a block diagram of the die cutter 100.
The die cutter 100, which is a punching device, includes a control unit 30 which is a control means for controlling a moving mechanism (press motor 3 and elevating transmission mechanism 4) for moving the moving surface plate 1 up and down toward the fixed surface plate 2. Then, the moving mechanism brings the moving surface plate 1 closer to the fixed surface plate 2, so that the die 8 attached to at least one of the moving surface plate 1 and the fixed surface plate 2 (fixed surface plate 2 in this embodiment) is used. The sheet material S, which is the work piece, is punched into a predetermined shape.
The control unit 30 of the die cutter 100 controls the drive of the four press motors 3 (3a to 3d) and the transport drive motor 13 based on the outputs from the operation panel 101 and the inlet sensor 25. In the die cutter 100 of the present embodiment, the control unit 30 can independently drive and control the four press motors 3 (3a to 3d).

Next, the preparatory work for performing the punching process will be described.
In the sheet feeder 200, a bundle of sheet materials S to be punched is placed on a mounting shelf.

In the die cutter 100, the die 8 is set on the fixed surface plate 2, and the face plate 9 is set on the moving surface plate 1. When setting the die 8 and the face plate 9, the discharge unit provided at the position closest to the die cutter 100 among the units constituting the discharge processing device 400 is manually or electrically lowered. As a result, the exit side of the space between the fixed surface plate 2 and the moving surface plate 1 through which the sheet material S passes is opened, and access from the outside becomes possible.

Below the fixed surface plate 2, a mold slide guide capable of sliding the die 8 in the direction along the transport direction is provided. By inserting the die 8 into the space below the fixed surface plate 2 from the downstream side in the transport direction of the apparatus main body, the die 8 slides toward the upstream side in the transport direction along the die slide guide. The die fixing member 18 pushes the die 8 into the die 8 by inserting the die 8 until the tip of the die 8 in the insertion direction abuts on the die abutting plate 19 and pulling down the die fixing lever 17 to bring the die fixing lever 17 into the state shown in FIG. It is locked in a state where it is abutted against the backing plate 19 and the die 8 is abutted against the lower surface of the fixed surface plate 2. As a result, the die 8 is fixed to the fixed surface plate 2.

When an identifier such as a barcode for calling information about the die 8 is given to the die 8, the die 8 is set on the fixed surface plate 2 after the identifier is read by a reading means such as a handy scanner.

After setting the die 8 and the face plate 9, the discharge unit is manually or electrically raised to a predetermined position.

Next, the job is set using the operation panel 101 or the external input device. Examples of the setting contents include the size of the sheet material S, the height of the cutting blade 81 of the die 8, the thickness of the sheet of the die 8, the number of punches, the die reference position, the sheet reference position, and the like.
Here, the thickness of the sheet of the die 8 is the stainless plate 82 fixed to the upper surface of the die 8 and the image sheet fixed to the upper surface of the stainless plate 82 and drawn with the arrangement of the cutting blade 81 of the die 8. , The sum of the thicknesses of the protective sheet that covers the upper surface of the image sheet.
The die 8 is inserted and removed from the die cutter 100 in a state where a stainless steel plate 82 is laminated on the upper surface thereof, an image sheet to which a shim tape is attached if necessary, and a protective sheet in this order.

The stainless steel plate 82 is a member that prevents the cutting blade 81 of the die 8 from being pushed up by the face plate 9 and protruding from the back surface (upper surface) of the die 8. The image sheet can confirm the arrangement of the cutting blade 81 of the punching die 8, and when the location where the punching pressure is insufficient can be found from the arrangement of the cutting blade 81, a shim tape for removing unevenness is attached to the upper surface of the image sheet. Can be kept. The protective sheet covers and protects the upper surface of the image sheet to which the shim tape for removing unevenness is attached. Therefore, when the protective sheet is slid to set the die 8, the shim tape for removing unevenness rubs against the lower surface of the fixed surface plate 2. It can be prevented from peeling off.

The above-mentioned punching reference position and sheet reference position are defined as a stop position where the stop position of the sheet material S during the punching process matches the position to be cut on the sheet material S and the position of the cutting blade 81 of the punching die 8. This is the reference value to be entered in the job settings.
The sheet material S is stopped when the inlet sensor 25 arranged on the upstream side of the transport belt pair (14, 15) detects the rear end of the sheet material S and then obtains a predetermined number of stop pulses. Punching is performed at the stop position.
In the job setting, the operator extracts an arbitrary blade reference point from the cutting blade 81 of the die 8, and inputs a die reference position which is a distance from the blade reference point to the upstream end of the die 8. .. Further, the operator extracts the reference point to be cut corresponding to the above-mentioned blade reference point from the positions to be cut on the sheet material S to be punched, and the sheet material S to be punched from the reference point to be cut. Enter the seat reference position, which is the distance to the upstream edge.
Based on the input die-cutting reference position and sheet reference position, the control unit 30 sets the number of stop pulses described above so that the sheet material S stops at a stop position where the blade reference point and the cut reference point match. Calculate and set. By this process, the cutting blade 81 of the die 8 and the position to be cut on the sheet material S at the time of the punching process can be matched.

When the job to be executed by the die cutter 100 includes a scoring process for scoring the sheet material S, the work of fixing the scoring facing concave material to the face plate 9 is performed. In this work, double-sided tape is attached to the lower surface of the streaked facing concave material, and the streaked facing concave material and the clip are attached to the streaked convex portion provided in the die 8. When the streak recess transfer button is operated in this state, the moving surface plate 1 moves with a smaller amount of movement than the punching process operation, the face plate 9 comes into contact with the lower surface of the facing recess material, and the facing recess material is provided with double-sided tape. Is attached to the face plate 9. Since the clip remains in the pasted facing concave material, the face plate 9 is removed from the moving surface plate 1, the clip which is an unnecessary member is removed, and the face plate 9 is fixed to the moving surface plate 1.

In the die cutter 100, after the various settings described above, an adjustment process is performed so that appropriate punching can be performed before the mass production process in which the sheet material S is continuously conveyed and continuously punched.

In the adjustment process, only one sheet material S is fed, and a test feed for punching is performed. In the test feeding, the die cutter 100 performs the punching process, but the separator does not perform the separation process, and the product of the punching process and the surplus portion are discharged to the stacker in a state where they are not separated.
When the worker presses the test feed button on the operation panel 101, the test feed is performed, and the worker sees the deliverable of the test feed and adjusts each part. Repeat test feeding and adjustment operations as needed.

The adjustment operation is performed by the operation panel 101, but may be performed by an external input device.
The objects to be adjusted are the position of the sheet material S in the width direction, the inclination (skew) of the sheet material S with respect to the transport direction, the position of the sheet material S when stopped at the time of punching, and the like in the transport direction. Further, the die cutter 100 of the present embodiment can be adjusted by operating the operation panel 101 to correct the unevenness of punching, as will be described in detail later. The operator visually observes the sheet material S obtained by the test feeding, and performs an adjustment operation based on the slippage and unevenness of the sheet material S.

After the adjustment process, the operator inputs the number of sheets to be processed and the processing speed on the operation panel 101, and presses the start button to execute the mass production process. The mass production process is stopped by the processing expiration of the input number of processed sheets, the detection of an error, or the operation of the stop button by the operator.
The start button and the stop button may be provided not only on the operation panel 101 but also on the operation unit of the seat feeder 200 so that they can be operated from either of them.

Next, the operation of the punching process in the die cutter 100 will be described.
When the start button of the operation panel 101 is pressed, the sheet material S is sent from the sheet feeder 200, the inclination of the sheet material S and the position in the width direction are corrected by the resist device 300, and the sheet material S is supplied to the die cutter 100. To. In the die cutter 100, the transfer drive motor 13 is driven, and the lower transfer belt 14 and the upper transfer belt 15 of the transfer belt pair start endless movement. Then, the sheet material S supplied from the resist device 300 is sandwiched between the transport belt pairs and conveyed. The transport drive motor 13 is stopped after a predetermined timing has elapsed after the inlet sensor 25 arranged on the upstream side of the transport belt pair detects the rear end of the sheet material S. As a result, the sheet material S sandwiched between the transport belt pairs is stopped at a predetermined punching position in the punching region sandwiched between the moving surface plate 1 and the fixed surface plate 2.

Next, the four press motors 3 are driven to raise the moving surface plate 1. When the moving surface plate 1 rises, the protruding portion 29 of the moving surface plate 1 pushes up the roller holding member described above, and the sheet material S at the transport height also rises. By driving each of the four press motors 3 in a forward rotation by a predetermined rotation amount to stop, the moving surface plate 1 reaches the upper stop position, and the sheet material S is punched into the shape of the cutting blade 81 of the die 8.

Next, the four press motors 3 reversely drive and stop by a predetermined rotation amount, so that the moving surface plate 1 descends and reaches the lower stop position. At this time, the roller holding member also descends together with the moving surface plate 1, and the sheet material S descends to the transport height. After that, by restarting the drive of the transfer drive motor 13, the sheet material S that has been punched is transferred to the discharge processing device 400, and the subsequent sheet material S supplied from the resist device 300 is transferred to the transfer belt pair. It is sandwiched between and transported to the punching position.
During mass production processing, these operations are repeated.

In the above description, the press motor 3 is driven in the forward direction after the transfer drive motor 13 is stopped, and the reverse drive of the press motor 3 is stopped and then the drive of the transfer drive motor 13 is restarted. It is not limited to. The press motor 3 may be driven in the forward rotation before the transfer drive motor 13 is stopped, or the transfer drive motor 13 may be driven in the forward direction before the reverse drive of the press motor 3 is stopped, as long as the transfer failure of the sheet material S such as clogging does not occur. You may restart the drive of. By providing a period in which the drive period of the transfer drive motor 13 and the drive period of the press motor 3 overlap, the processing speed can be improved.

Next, the movement of the press motor 3 during the punching operation will be described.
When the transport drive motor 13 is driven, the rotation position of the press motor 3 which is a servo motor becomes the lower reference rotation position corresponding to the lower stop position in the control unit 30 so that the elevating transmission mechanism 4 stands by at the lower stop position. The rotation position is controlled so as to.

After the inlet sensor 25 detects the passage of the rear end of the sheet material S and a predetermined timing elapses, the transport drive motor 13 is stopped and the press motor 3 starts to rotate in the forward direction. Then, the press motor 3 is rotated forward to the upper reference rotation position so that the elevating transmission mechanism 4 is in the upper stop position, and the press motor 3 is stopped.
When the rotation positions of all four press motors 3 become the upper reference rotation positions and the forward rotation is stopped, a predetermined time (20 [msec (millisecond)]) waits, and then the reverse rotation is started. The four press motors 3 stop when they rotate in the reverse direction to the lower reference rotation position.
In this way, the four press motors 3 repeat the forward rotation that rotates from the lower reference rotation position to the upper reference rotation position and the reverse rotation that rotates from the upper reference rotation position to the lower reference rotation position, thereby performing the punching process. I do.

FIG. 13 is a schematic explanatory view of one of the four elevating transmission mechanisms 4. 13 (a) is an explanatory view of the XX plane, FIG. 13 (b) is an explanatory view of the YY plane, and FIG. 13 (c) is a perspective view.
As shown in FIG. 13, the elevating transmission mechanism 4 is fixed to a rotary input gear 41 that engages with the rotary output gear 31, an eccentric shaft 44 that rotates together with the rotary input gear 41, and a gantry frame 7, and is fixed to the eccentric shaft 44. A shaft holding portion 42 that rotatably holds the rotating shaft portion 441 is provided. Further, the elevating transmission mechanism 4 includes an elevating transmission rod 43 whose lower portion engages with the eccentric shaft portion 442 of the eccentric shaft 44 and whose upper portion engages with the cylindrical portion 10 of the moving surface plate 1.

FIG. 14 shows the displacement between the elevating transmission rod 43 and the cylinder portion 10 when the eccentric shaft 44 is rotated around the center line of the rotation shaft portion 441 so that the cylinder portion 10 moves from the bottom dead center to the top dead center. It is explanatory drawing which shows. FIG. 14A is an explanatory diagram of a state in which the columnar portion 10 is located at the bottom dead center, and FIG. 14B is an explanatory diagram of a state in which the columnar portion 10 is located between the bottom dead center and the top dead center. 14 (c) is an explanatory diagram of a state in which the cylindrical portion 10 is located at the top dead center.

The eccentric shaft 44 is a member whose center line position is different between the rotary shaft portion 441 engaged with the shaft holding portion 42 and the eccentric shaft portion 442 engaged with the elevating transmission rod 43. The position of the center line of the rotary input gear 41 coincides with that of the rotary shaft portion 441.

When the press motor 3 is rotationally driven to rotate the rotary output gear 31, 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 portion 441. As a result, the eccentric shaft portion 442 rotates around the central axis of the rotary shaft portion 441, and the elevating transmission rod 43 engaged with the eccentric shaft portion 442 and the cylindrical portion 10 engaged with the elevating transmission rod 43 move. .. At this time, the moving platen 1 having the columnar portion 10 is restricted from moving in the width direction (horizontal direction in FIG. 14, direction parallel to the Y axis) by the upstream side guide portion 22 and the downstream side guide portion 24. The cylindrical portion 10 also does 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. 14B, the elevating transmission rod 43 is tilted and the cylindrical portion 10 moves only in the vertical direction. do.

The eccentric shaft 44 of the present embodiment has an eccentric amount of 15 [mm] between the central axis of the rotating shaft portion 441 and the central axis of the eccentric shaft portion 442. Therefore, the vertical movable range H, which is the displacement amount of the cylindrical portion 10 when the eccentric shaft 44 is rotated from the state of the bottom dead center shown in FIG. 14 (a) to the state of the top dead center shown in FIG. 14 (c). Is 30 [mm].

The moving mechanism for moving the moving surface plate 1 is the four elevating transmission mechanisms 4 (4a to 4d) as a plurality of pressurizing mechanisms that independently pressurize the four columnar portions 10 as the plurality of pressurizing portions. And four press motors 3 (3a to 3d) as a plurality of drive sources for driving each of them.
Since the control unit 30 can independently control the drive of each of the four press motors 3, the upper reference rotation position corresponding to the upper stop position can be changed for each press motor 3. Thereby, the height of the cylindrical portion 10 at the upper stop position can be individually changed.

In the die cutter 100 of the present embodiment, the eccentric shaft 44 is not controlled to rotate once, and the lower stop position and the upper stop, which is the range in which the cylindrical portion 10 is sandwiched between the bottom dead center and the top dead center. Controls to move back and forth between positions.
Regarding the rotation angle θ of the eccentric shaft 44, when the cylindrical portion 10 is at the bottom dead center, θ = 0 [°], and when the cylindrical portion 10 is at the top dead center, θ = 180 [°]. Here, assuming that the rotation angle of the eccentric shaft 44 when the cylindrical portion 10 is in the lower stop position is θ1 and the rotation angle when the cylindrical portion 10 is in the upper stop position is θ2, the following equation (1) holds. ..
0 [°] ≤ θ1 <θ2 <180 [°] ・ ・ ・ ・ ・ ・ (1)

In this way, by making the rotation angle of the upper stop position smaller than the rotation angle of the top dead center, it is possible to change the rotation angle "θ2" when the cylindrical portion 10 is in the upper stop position, and when it is in the upper stop position. It is possible to adjust the position of the cylindrical portion 10 of the above.
When pressurizing, the four press motors 3 in the lower reference rotation position corresponding to the state in which the cylindrical portion 10 which is the home position of the elevating transmission mechanism 4 is located in the lower stop position are rotated forward at the same speed. Then, the press motor 3 rotated to the upper reference rotation position corresponding to the upper stop position of the elevating transmission mechanism 4 is sequentially stopped. When the "θ2" of the four press motors 3 are different from each other, the press motor 3 having a large amount of rotation from the lower reference rotation position to the upper reference rotation position has a later stop timing than the other press motors 3.
On the other hand, the amount of rotation from the lower reference rotation position to the upper reference position is calculated, and the rotation speed is increased as the rotation amount is larger for the press motor 3, and all the press motors 3 are above the lower reference rotation position. The drive time to the reference rotation position may be controlled to be the same time, or the difference in drive time may be small.

When the upper reference rotation positions are different between the press motors 3, the lower reference rotation position may be set so that the amount of rotation to the upper reference rotation position is the same. As a result, even if the upper reference positions of the press motors 3 are different from each other, 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. Further, in the punching operation, it is not necessary to lengthen the driving time of some press motors 3 or slow down the rotation speed, and the time required for the punching operation can be shortened. The setting of the lower reference rotation position may be automatically calculated by the control unit 30 or may be input by the user.

As described above, in the die cutter 100 of the present embodiment, the upper reference rotation position corresponding to the upper stop position can be changed for each press motor 3, and the height of the cylindrical portion 10 at the upper stop position can be individually changed. Can be changed to.
With such a configuration, the value of the rotation angle "θ2" of the eccentric shaft 44 at the upper reference rotation position becomes large by making a change to increase the rotation amount at the upper reference rotation position of one press motor 3. Therefore, the position of the cylindrical portion 10 at the upper stop position becomes higher. As a result, the punching pressure, which is the contact pressure between the face plate 9 and the punching die 8 during the punching process, can be increased vertically above the columnar portion 10 whose position is higher when the upper stop position is reached.

In this way, in the configuration where the contact pressure between the face plate 9 and the die 8 during the punching process can be partially increased, the upper stop position of the columnar portion 10 below the portion where the punching unevenness occurs during the test feeding. By increasing the amount of rotation of the upper reference rotation position of the press motor 3 so that

That is, the punching pressure adjusted by pasting a shim tape for removing unevenness on the back of the die with a conventional die cutter can be adjusted by changing the rotation amount of the upper reference rotation position of the press motor 3. ..
For example, when pulling unevenness occurs on the front upstream side of the sheet material S output by the test feeding, a setting is made to increase the rotation amount of the upper reference rotation position of the first press motor 3a. As a result, the value of the rotation angle "θ2" of the eccentric shaft 44 of the first elevating transmission mechanism 4a becomes large, and the position of the first cylindrical portion 10a at the upper stop position can be made higher than before the setting. Then, the punching pressure on the front upstream side of the sheet material S at the time of punching processing can be increased, and uneven punching can be eliminated.

Next, the transfer of the sheet material S by the transfer belt pair including the lower transfer belt 14 and the upper transfer belt 15 will be described.
In a punching device such as a die cutter 100, which is called a flat plate punching device for moving a sheet material or a punching die up and down using a flat punching die, the sheet transport member may be arranged in a range facing the punching die. Can not.
For this reason, in the conventional flat plate punching device, the tip of the sheet material is gripped by a gripper fixed to a gripper bar spanned by two circulation chains provided on both sides in the width direction of the sheet material transport path. However, it is common to transport the sheet material by pulling it.

On the other hand, as shown in FIGS. 3, 4, 8 to 10, the die cutter 100 has a transport belt pair (14, 15) arranged on the inner side in the width direction, which is outside the facing range below the die 8. ). Then, one end of the sheet material S in the width direction is sandwiched by the transport belt pair (14, 15), and the sheet material S is conveyed so as to pass through the range facing the die 8 in the die cutter 100.

Next, an air discharge mechanism for blowing air onto the sheet material S sandwiched and transported by the transport belt pair (14, 15) will be described with reference to FIG.
As shown in FIG. 10, the die cutter 100 includes a lower blower 70 and an upper blower 90 as an airflow generating means for generating an airflow in a region through which the sheet material S held and conveyed by a transport belt pair (14, 15) passes. To prepare for.
In FIG. 10, the lower airflow A1 generated by the lower blower 70 is indicated by the alternate long and short dash line, and the upper airflow A2 generated by the upper blower 90 is indicated by the alternate long and short dash line. Further, the transport direction of the sheet material S is indicated by an arrow “α”, and the portion where the sheet material S is located above in FIG. 10 (c) is indicated by a broken line.

The lower blower 70 extends in the width direction and includes a lower blower 73 below the lower airflow horizontal guide pipe 72 in which the lower blower port 71 is formed. The airflow generated by the lower blower 73 sucking the surrounding air passes through the lower airflow ascending guide pipe 74, flows into the inner end of the lower airflow horizontal guide pipe 72 in the width direction, and flows into the lower end of the lower airflow horizontal guide pipe 72. It passes between the inner wall surface and the lower airflow pipe wall portion 75, and flows toward the front side in the width direction (Y-axis direction). The airflow that reaches the front side of the lower airflow pipe wall portion 75 of the lower airflow horizontal guide pipe 72 is the lower airflow A1 from the lower airflow port 71 provided on the downstream side of the transport direction "α" in the lower airflow horizontal guide pipe 72. Is discharged as.

It passes between the inner wall of the lower airflow horizontal guide pipe 72 and the lower airflow pipe wall portion 75, and flows toward the front side in the width direction to become an airflow having a component toward the front side from the back side in the width direction. .. Further, by flowing out from the lower airflow port 71 opened on the downstream side in the transport direction of the lower airflow horizontal guide pipe 72, the airflow has a component from the upstream side to the downstream side in the transport direction. By having these components, as shown in FIG. 10 (c), the downflow airflow A1 becomes an airflow inclined from the back side in the width direction toward the front side with respect to the transport direction "α".

The sheet material S, which is conveyed while only the end portion on the back side in the width direction is held, may hang down on the front side in the width direction and come into contact with the face plate 9 fixed to the upper surface of the moving surface plate 1. If the moving sheet material S comes into contact with the face plate 9, the sheet material S may be caught by the face plate 9 and the sheet material S may be damaged. In particular, when the sheet material S is reinforced by the die cutter 100, the face plate 9 is provided with an facing concave portion facing the reinforced convex portion provided in the die 8, and the sheet material being conveyed to the facing concave portion is provided. When S comes into contact with each other, damage is likely to occur due to the sheet material S being caught on the face plate 9.
In the die cutter 100 of the present embodiment, the lower airflow A1 is discharged from the lower airflow port 71 to the lower surface of the sheet material S in the region where the sheet material S held and conveyed by the transfer belt pair (14, 15) passes. As a result, the lower surface of the sheet material S in which only the inner end portion in the width direction is held can be pushed up, or an airflow layer can be formed below the sheet material S. Then, it is possible to suppress the front side of the sheet material S from hanging down, and it is possible to suppress damage to the sheet material S due to the sheet material S hanging down.

Further, by generating an airflow from the lower air vent 71 arranged on the upstream side of the punching region toward the punching region, the generation of the airflow in the counter direction with respect to the sheet material S to be conveyed is suppressed. It is possible to prevent the sheet material S from rolling up due to the air flow. Further, by generating an air flow from the back side to the front side, the transport belt pair (14, 15) is on the opposite side to the back side holding the sheet material S, and the behavior is not regulated in front of the sheet material S. It is possible to prevent the side from fluttering. As a result, it is possible to prevent the sheet material S from coming into contact with the members located above and below the sheet material S due to curling or fluttering, and it is possible to suppress damage to the sheet material S due to this contact.

The configuration in which the airflow is blown onto the lower surface of the sheet material S during transportation is not limited to the configuration in which the airflow inclined with respect to the transportation direction “α” is generated from the upstream side of the punching region. For example, an air flow may be blown from below the transport belt pair (14, 15) holding the sheet material S on the inner side in the width direction or from the inside of the ring of the lower transport belt 14 toward the lower surface of the sheet material S. That is, any configuration can be used as long as one end is held by the holding and transporting means and the lower surface of the sheet material S that is about to hang down due to its own weight can be pushed up by the air flow, or an air flow layer can be formed below the sheet material S. It may have such a configuration.

The upper blower 90 extends in the width direction and includes an upper blower 93 above the upper airflow horizontal guide pipe 92 in which the upper blower port 91 is formed. The airflow generated by the upper blower 93 sucking the surrounding air passes through the upper airflow down guide pipe 94, flows into the widthwise inner end of the upper airflow horizontal guide pipe 92, and flows into the upper airflow horizontal guide pipe 92. It flows toward the front side in the width direction (Y-axis direction). A plurality of rectifying plates 92a having planes parallel to the XZ plane are arranged in the upper airflow horizontal guide tube 92 in the width direction (Y-axis direction), and rectify with the upper surface of the inner wall of the upper airflow horizontal guide tube 92. A flow path through which airflow can pass is formed between the upper end of the plate 92a. The gas flowing into the upper airflow horizontal guide pipe 92 passes through the flow path above the straightening vanes 92a, and a part of the gas goes downward and passes between the straightening vanes 92a. At the time of this passage, it is rectified by the airflow along the transport direction "α" and is discharged as the upper airflow A2 from the upper airflow port 91 provided on the downstream side of the transport direction "α" in the upper airflow horizontal guide pipe 92. ..

The airflow is rectified by the rectifying plate 92a and flows out from the upper air outlet 91 opened on the downstream side in the transport direction of the upper airflow horizontal guide tube 92, so that the airflow has a component from the upstream side to the downstream side in the transport direction. As a result, the upper airflow A2 becomes an airflow along the transport direction “α” as shown in FIG. 10 (a).

The sheet material S, which is transported while holding only the end on the back side in the width direction, not only hangs down on the front side in the width direction, but also receives a headwind from the downstream side in the transport direction due to air resistance during transportation. Therefore, there is a risk that the front side in the width direction will roll up. When the sheet material S is rolled up, the sheet material S may come into contact with the lower surface of the die 8 fixed to the lower surface of the fixed surface plate 2 and be caught by the cutting blade 81 protruding from the lower surface of the die 8 to damage the sheet material S. There is.
Further, since the die cutter 100 of the present embodiment blows an air flow from the lower air outlet 71 to the lower surface of the sheet material S, the sheet material S may come into contact with the lower surface of the die 8 by being pushed up by the air flow.

In the die cutter 100 of the present embodiment, the upper airflow A2 is discharged from the upper air outlet 91 to the upper surface of the sheet material S in the region where the sheet material S held and conveyed by the transfer belt pair (14, 15) passes. As a result, an airflow layer can be formed above the upper surface of the sheet material S in which only the inner end portion in the width direction is held, and the sheet material S can be prevented from coming into contact with the lower surface of the die 8 located above. Damage to the sheet material S due to contact can be suppressed.

Further, by generating an airflow from the upper air vent 91 arranged on the upstream side of the punching region toward the punching region, the generation of the airflow in the counter direction with respect to the sheet material S to be conveyed is suppressed. It is possible to prevent the sheet material S from rolling up due to the air flow.

In a configuration such as the die cutter 100 in which only the end portion on the back side in the width direction of the sheet material S is sandwiched, the front side of the sheet material S hangs down or rolls up, and the posture of the sheet material S during transportation is stable. There is a risk that it will not work. On the other hand, air is blown by the lower blower 70 and the upper blower 90, which are air discharge mechanisms, and the front side of the sheet material S is lifted to stabilize the posture of the sheet material S by bringing the posture of the sheet material S closer to horizontal. be able to.
As a configuration for transporting the sheet material S with a pair of belts, it is conceivable to arrange the pair of transport belts on both sides in the width direction to stabilize the posture of the sheet material S. However, in this configuration, the sheet material S that can be conveyed is limited to the wide sheet material S that can sandwich both ends in the width direction with the transport belt pairs located on both outer sides of the die 8 in the width direction. On the other hand, in the case of the die cutter 100 of the present embodiment in which only one end of the sheet material S in the width direction is sandwiched between the transport belt pairs (14, 15), the narrow sheet material S is used. Can also be transported and punched.

FIG. 11 is an explanatory diagram of a modified example of the lower blower 70.
The lower airflow horizontal guide pipe 72 of the lower blower 70 shown in FIG. 10C has a shape extending over the entire width direction of the region through which the sheet material S can pass, and the wall surfaces at both ends in the width direction are conveyed. It is a plane parallel to the direction (parallel to the X-axis direction). On the other hand, the lower airflow horizontal guide pipe 72 of the lower blower 70 of the modified example shown in FIG. 11 has a shorter length in the width direction than the region through which the sheet material S can pass. Further, the wall surfaces at both ends of the lower airflow horizontal guide pipe 72 in the width direction are inclined so as to be closer to the front side toward the downstream side in the transport direction with respect to the direction parallel to the transport direction (parallel to the X-axis direction). There is.

In the blower 70 of the modified example, the airflow generated by the lower blower 73 sucking the surrounding air passes through the lower airflow ascending guide pipe 74, and when it flows into the lower airflow horizontal guide pipe 72, the lower airflow horizontal guide pipe 72 A flow is formed along the sloping walls at both ends in the width direction. As a result, as shown in FIG. 11, the lower airflow A1 is inclined so as to be directed from the back side to the front side in the width direction with respect to the transport direction "α", and is discharged from the lower airflow port 71.

In the die cutter 100, unlike the method using the circulation chain described above, the transport belt pair (14, 15), which is a transport member, is a separate member from the transport member of the device (resist device 300) on the upstream side. For this reason, the sheet material is delivered from the transport member of the device on the upstream side, and there is a possibility that the position shift at the time of delivery or the position shift due to the difference in the transport speed may occur. Therefore, it is necessary to improve the accuracy of the stop position of the sheet material S during the punching process with the transport belt pair (14, 15) forming the complete transport device in the die cutter 100. However, like the transport member, the sensor for detecting the passage of the sheet material S cannot be arranged in the range facing the die 8. Therefore, the stop timing of the transfer drive motor 13 for driving the transfer belt pair (14, 15) is set based on the detection result of the inlet sensor 25 arranged near the upstream end of the transfer belt pair (14, 15). decide.

As shown in FIG. 2, the die cutter 100 includes a first strain sensor 26a and a second strain sensor 26b on the upstream side and the downstream side in the transport direction of the front frame 5. Further, as shown in FIGS. 3 and 4, a third strain sensor 26c and a fourth strain sensor 26d are provided on the upstream side and the downstream side of the back frame 6 in the transport direction.
The four strain sensors 26 (26a, 26b, 26c, 26d) measure the amount of vertical extension of the front frame 5 and the back frame 6, which are holding members for holding the fixed surface plate 2, among the frames of the die cutter 100. It is a means for measuring the amount of elongation.
The measurement points are a plurality of points (two points in the present embodiment) separated from each other in the transport direction on each of the front frame 5 and the back frame 6, which are frames on both sides of the transport path of the sheet material S.

The four strain sensors 26 are fixed in the vicinity of the upper end portion of the front frame 5 or the rear frame 6, and strain detection rods 27 (27a, 27b, 27c, 27d) are arranged below the strain sensor 26, respectively. The lower ends of the four strain detection rods 27 are fixed to the detection rod fixing portions 28 (28a, 28b, 28c, 28d) near the lower ends of the front frame 5 or the rear frame 6. Since only the lower end of the strain detecting rod 27 is fixed to the front frame 5 or the back frame 6, the position of the upper end thereof is not affected by the deformation of the front frame 5 or the back frame 6. On the other hand, since the strain sensor 26 is arranged at the upper end of the front frame 5 or the back frame 6, when the front frame 5 or the back frame 6 is extended, the strain sensor 26 moves upward and is a distance to the upper surface of the facing strain detection rod 27. When the strain sensor 26 is separated and the elongation is eliminated, the distance from the strain sensor 26 to the upper surface of the strain detection rod 27 also returns to the original distance. Therefore, the strain sensor 26 can detect the amount of extension of the front frame 5 and the back frame 6 at the arranged position by measuring the change in the distance to the upper surface of the strain detecting rods 27 arranged opposite to each other.

The four strain sensors 26 detect the amount of extension of the front frame 5 and the back frame 6 at the installed position as an electric signal. The control unit 30 can control the drive of each of the four press motors 3 based on the measurement result of the strain sensor 26.

Examples of the sheet material S, which is a plate-shaped workpiece, include paper media such as plain paper, cardboard, label paper, thick paper, and coated paper. In addition to paper media, plate-shaped workpieces to be processed by the punching device according to the present invention include OHP sheets, films, fabrics, resin sheets, metal sheets, metal foils, plating treatments, and the like. It may be a bundle or a single sheet in which a plurality of sheets are stacked, including an electronic circuit board material, a special film, a plastic film, a prepreg, a sheet for an electronic circuit board, and the like.

Although the configuration in which the moving surface plate is arranged below and the fixed surface plate is arranged above has been described, the moving surface plate may be arranged above and the fixed surface plate may be arranged below. Further, both of the two surface plates facing each other may be used as a movable surface plate that can be moved up and down, and may be connected to and separated from each other by a plurality of (four) elevating drive sources.
In the configuration in which the moving surface plate is arranged below and the fixed surface plate is arranged above as in the present embodiment, the four press motors 3 having a certain weight and the four elevating transmission mechanisms 4 are low in the device. It can be arranged at a position, and the center of gravity of the device of the die cutter 100 can be lowered.

What has been described above is an example, and has a unique effect in each of the following aspects.

[Aspect 1]
A moving surface plate such as a moving surface plate 1 and an opposed surface plate such as a fixed surface plate 2 arranged to face each other in the vertical direction and the like, a press motor 3 for moving the moving surface plate toward the opposed surface plate, and an elevating transmission mechanism 4. By moving the moving mechanism such as, and the holding part such as the belt surface that holds one end of the sheet-shaped workpiece such as the sheet material S, the workpiece is placed in the punched area sandwiched between the moving surface plate and the opposed surface plate. In a punching device such as a die cutter 100 provided with a holding and transporting means such as a lower transporting belt 14 and an upper transporting belt 15 for transporting It is characterized by comprising airflow generating means such as a lower blower 70 and an upper blower 90 for generating an airflow such as A1 and an upper airflow A2.
According to this, the lower surface of the work piece to be conveyed by the holding and transporting means is pushed up, an airflow layer is formed below the lower surface, or an airflow layer is formed above the upper surface of the work piece. It is possible to prevent the workpiece being conveyed from coming into contact with a member (face plate 9, punching die 8, etc.) located below or above.
The die cutter 100, which is a punching device of the present embodiment, is configured to include a transport belt pair (14 and 15) for holding one end of the sheet material S in the width direction as a holding and transporting means. The present invention is also applicable to a configuration in which a plurality of grippers are arranged on an endless chain as described in Patent Document 1. In this configuration, an airflow is generated from one end held by the gripper in the sheet-like workpiece to the opposite end. As a result, it is possible to prevent the end portion on the side not held by the gripper from hanging or rolling up. That is, any configuration can be applied as long as one end of the sheet-shaped workpiece is held and conveyed by the holding and conveying means.

[Aspect 2]
In the punching device of the first aspect, the holding and transporting means is a belt transporting device that transports the workpiece by sandwiching it between two belt members such as the lower transport belt 14 and the upper transport belt 15, and the two belt members have a width. It is characterized in that it is located on the outside of the moving surface plate in terms of direction, and holds a portion of the workpiece located in the punching region that protrudes from the punching region.
According to this, two belt members arranged so as to avoid the punching area sandwich one end of the sheet-shaped workpiece and convey it, and the member being conveyed is located below or above the workpiece. It is possible to realize a configuration that can suppress contact with the belt.

[Aspect 3]
In the punching device of the second aspect, the airflow generating means is located on the upstream side in the transport direction with respect to the punching region, and is characterized in that the airflow toward the punching region is generated.
According to this, it is possible to suppress the generation of an air flow in the counter direction with respect to the conveyed work piece, and to prevent the sheet-shaped work piece from rolling up due to the airflow.

[Aspect 4]
In the punching device according to any one of aspects 1 to 3, the airflow generating means such as the lower blower 70 discharges the airflow below the region through which the workpiece to be held and conveyed by the holding and transporting means passes. It is provided with a lower airflow discharge port such as 71.
According to this, the lower surface of the sheet-shaped workpiece to be conveyed by the holding and conveying means can be pushed up, or an air flow layer can be formed below the lower surface, and the workpiece being conveyed can be a member located below. Contact can be suppressed.

[Aspect 5]
In the punching device of the fourth aspect, the airflow generating means is the airflow discharged from the lower airflow discharge port from one end side to the other end side of the workpiece held by the holding and transporting means (from the upstream side of the punching region). It is characterized in that a downflow A1 or the like inclined with respect to the transport direction "α" is generated.
According to this, it is possible to push up the other end side of the workpiece by the air flow and prevent the workpiece being conveyed from coming into contact with the member located below.

[Aspect 6]
In the punching device according to any one of aspects 1 to 5, the airflow generating means such as the upper blower 90 discharges the airflow above the region through which the workpiece to be held and conveyed by the holding and conveying means passes. It is characterized by having an upper airflow discharge port such as 91.
According to this, an air flow layer can be formed above the upper surface of the sheet-shaped workpiece to be conveyed by the holding and conveying means, and it is possible to prevent the workpiece being conveyed from coming into contact with the member located above. ..

[Aspect 7]
In the punching device of the sixth aspect having at least the configuration of the second aspect, the airflow generating means is characterized in that the airflow from the upstream side to the downstream side in the transport direction is generated as the airflow discharged from the upper airflow discharge port.
According to this, it is possible to suppress the generation of an air flow in the counter direction with respect to the conveyed work piece, and to prevent the sheet-shaped work piece from rolling up due to the airflow.

1: Moving surface plate 2: Fixed surface plate 3: Press motor 3a: First press motor 4: Elevating transmission mechanism 4a: First elevating transmission mechanism 5: Front frame 6: Back frame 7: Frame frame 8: Die-cutting 9: Face plate 13: Transfer drive motor 14: Lower transfer belt 15: Upper transfer belt 16: Transfer drive transmission mechanism 25: Inlet sensor 70: Lower blower 90: Upper blower 100: Die cutter 500: Die cut system A1: Down air flow A2: Upper air flow

Schematic perspective of the die-cut system. Front view of the die cutter. Upstream side view of the die cutter. Downstream side view of the die cutter. Front view of the die cutter with the front frame and the back frame hidden. Rear view of the die cutter with the front frame and the back frame hidden. A perspective view of a die cutter that hides the front frame and the back frame. Schematic diagram of the upstream side surface of the die cutter. Schematic diagram of the front of the die cutter. Explanatory drawing of the die cutter during transporting a sheet material. Explanatory drawing of the modification of the lower blower. Block diagram of the die cutter. Schematic diagram of the elevating transmission mechanism. Explanatory drawing which shows the displacement between the elevating transmission rod and the cylinder part when the elevating transmission mechanism is driven so that the cylinder part moves from the bottom dead center to the top dead center.

Claims (7)

Moving surface plates and facing surface plates arranged facing each other in the vertical direction,
A moving mechanism that moves the moving surface plate up and down toward the opposed surface plate,
A punching means including a holding and transporting means for moving a holding portion for holding one end of a sheet-shaped workpiece to convey the workpiece to a punching region sandwiched between the moving surface plate and the opposed surface plate. In the device
A punching device comprising: an airflow generating means for generating an airflow in a region through which the workpiece to be held and conveyed by the holding and transporting means passes. In the punching device of claim 1,
The holding and transporting means is a belt transporting device that transports the workpiece by sandwiching it between two belt members.
The two belt members are located outside the moving surface plate in the width direction, and are characterized by sandwiching and holding a portion of the workpiece located in the punching region that protrudes from the punching region. Punching device. In the punching device of claim 2,
The airflow generating means is located on the upstream side in the transport direction with respect to the punching region, and is characterized in that the airflow generating means is generated toward the punching region. In the punching device according to any one of claims 1 to 3, the punching device
The airflow generating means is a punching device including a lower airflow discharge port that discharges airflow below a region through which the workpiece to be held and conveyed by the holding and transporting means passes. In the punching device of claim 4,
The airflow generating means is a punching device characterized in that, as an airflow discharged from the lower airflow discharge port, an airflow from one end side to the other end side of the workpiece held by the holding and transporting means is generated. In the punching device according to any one of claims 1 to 5,
The airflow generating means is a punching device including an upper airflow discharge port that discharges an airflow above a region through which the workpiece to be held and conveyed by the holding and transporting means passes. In the punching device of claim 6, which has at least the configuration of claim 2.
The airflow generating means is a punching device characterized in that an airflow directed from an upstream side to a downstream side in a transport direction is generated as an airflow discharged from the upper airflow discharge port.

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