JP2007283440A - Sheet cutting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately cut a sheet, with high accuracy and surely, to be separated from each other, with Thompson blade by increasing the transfer speed of the sheet to be cut. <P>SOLUTION: This sheet cutting apparatus includes: a receiving table 2 having a cutting surface 2A; the Thompson blade 3 for cutting the sheet 1 to be cut in a predetermined shape; a Thompson blade driving mechanism 4 for vertically reciprocating the Thompson blade 3; a conveying belt 5 for placing the sheet 1 to be cut thereon and transferring the same; a conveying mechanism 6 for driving the conveying belt 5 so that the sheet 1 to be cut 1 passes on the cutting surface 2A at a predetermined speed; and a supply mechanism 7 for supplying the sheet 1 to be cut on the conveying belt 5 at a predetermined speed. The Thompson blade driving mechanism 4 includes a vertical feed mechanism 4B for moving the Thompson blade 3 in the transfer direction of the sheet 1 to be cut. While the Thompson blade 3 is moved in the transfer direction of the sheet 1 to be cut by the vertical feed mechanism 4B, the Thompson blade 3 is lowered on the cutting surface 2A, the sheet 1 to be cut is cut into the cutting part 1A and a scrap part 1B. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus for punching and cutting a sheet connected in a belt shape into a predetermined shape with a Thomson blade, and in particular, a plastic sheet, which is a high-functional sheet having a multilayer laminated structure in which a plurality of sheets are laminated, with a Thomson blade. The present invention relates to a cutting apparatus that is optimal for cutting.

An apparatus for pulling out a cut sheet wound in a roll and cutting it with a Thomson blade has been developed. (See Patent Document 1)
This patent document describes a cutting apparatus that punches a cut sheet, which is a roll-shaped high-functional film, with a Thomson blade and cuts the cut sheet into a high-functional film having a high-quality standard dimension. This cutting device includes a feed roll that sequentially feeds roll-shaped cut sheets, and a cutting section that presses the roll-shaped cut sheets fed from the feed roll at a press position to form a highly functional film with a Thomson blade. And a punching means for cutting and punching into the scrap part, and a separating means for separating the cutting part to be a high-functional film punched with a Thomson blade from the scrap part on the downstream side. This cutting apparatus feeds a sheet to be cut to a press position with a feed roll. This feed roll is rotated in conjunction with the up and down reciprocating motion of the Thomson blade that moves up and down, and accurately feeds the roll-shaped cut sheet to the press position by a predetermined length. The cut sheet sent to the press position stops at an accurate predetermined position on the cut surface of the flat cradle. In this state, the Thomson blade descends and cuts into a cutting part and a scrap part that become a high-performance film.
JP 2002-346992 A

  In the above cutting apparatus, the sheet to be cut, which is a high-performance film wound in a roll shape, is transferred by a feed roll and moved to a press position. In this state, the transfer of the sheet to be cut is stopped and the Thomson blade is lowered. Then, the sheet to be cut is cut into a cutting part and a scrap part that have a high-performance film. Thereafter, the roll-shaped cut sheet is transferred again, and then cut with a Thomson blade. In other words, this cutting device is linked to the vertical movement of the Thomson blade to transfer the cut sheet wound in a roll shape, repeats the transfer and stop, and lowers and cuts the Thomson blade in the stopped state. The cut sheet is transferred again. Thus, the apparatus that repeats the transfer and stop of the cut sheet cannot increase the transfer speed of the cut sheet. This is because if the transfer speed of the cut sheet is increased, the cut sheet cannot be cut accurately. If the transfer speed of the cut sheet increases, it is necessary to rapidly accelerate and stop the cut sheet when transferring and stopping are repeated. The sudden acceleration and sudden deceleration of the sheet to be cut cause the relative position of the cut part and the scrap part to shift. In addition, the sheet to be cut is held in a flat state in an ideal state, and it becomes impossible to transfer. If the relative positions of the cut portion and the scrap portion that have been cut first are shifted, it becomes impossible to cut the cut portion that becomes a high-performance film to be cut next with a Thomson blade. The Thomson blade that cuts the next high-performance film cuts together the high-performance film that has been misaligned, the shape of the high-performance film that was cut first is out of order, and then the high-performance film that is cut next This is because it is cut in a large number of laminated states and cannot be cut in a normal state. Further, if the sheet to be cut to be transferred is not transferred to an accurate flat surface and is locally wrinkled, the shape of the cutting part that becomes a high-functional film cut with a Thomson blade will be out of order. For this reason, after the sheet to be cut is transferred to the cut surface of the receiving table, the transfer is stopped, the sheet to be cut is cut with a Thomson blade, and then the sheet to be cut next is cut again. There was a drawback that it was not possible to cut accurately and accurately while cutting time and cutting efficiently.

  In addition, the above cutting device makes the high-performance film only when the entire circumference of the cutting edge of the Thomson blade and the cutting surface of the cradle are completely parallel, and the entire cutting edge of the Thomson blade is in contact with the cutting surface. The cutting part can be completely separated from the scrap part. When a part of the Thomson blade edge comes into contact with the cut surface of the cradle and the remaining part does not come into contact with the cut surface, the entire circumference of the cutting part that becomes a high-performance film is completely separated from the scrap part. Can not.

The present invention has been developed for the purpose of solving such drawbacks. An important object of the present invention is to provide a sheet cutting apparatus that can cut a cut sheet with a Thomson blade accurately and with high accuracy while increasing the transfer speed of the cut sheet and shortening the tact time. is there.
Another important object of the present invention is to provide a sheet cutting apparatus capable of cutting while securely cutting with the Thomson blade while reducing damage to the Thomson blade and the cradle.

The sheet cutting apparatus of the present invention has the following configuration in order to achieve the above-described object.
The sheet cutting device includes a pedestal 2 having a flat cut surface 2A for cutting the cut sheet 1 drawn from a rolled state on the upper surface, and descends toward the cut surface 2A of the pedestal 2 Then, a Thomson blade 3 that cuts the cut sheet 1 into a cut portion 1A having a predetermined shape, and a Thomson blade drive mechanism 4 that reciprocates the Thomson blade 3 up and down. The Thomson blade 3 is reciprocated by the Thomson blade drive mechanism 4, and the cut sheet 1 is cut at the cut surface 2 </ b> A of the cradle 2. Furthermore, this cutting apparatus stops the cut sheet 1 transferred by the transfer belt 5 and the cut sheet 1 transferred by the transfer belt 5 on the cradle 2 at a predetermined speed. A conveyance mechanism 6 that drives the conveyance belt 5 so as to pass through without being provided, and a supply mechanism 7 that supplies the cut sheet 1 at a predetermined speed onto the conveyance belt 5 transferred by the conveyance mechanism 6 are provided. Further, the Thomson blade drive mechanism 4 of the cutting device includes a longitudinal feed mechanism 4B that moves the Thomson blade 3 in the transfer direction of the cut sheet 1 transferred by the conveyor belt 5. The Thomson blade 3 moves down on the cutting surface 2A of the cradle 2 by moving down in the transfer direction of the sheet 1 to be cut by the vertical feed mechanism 4B so as to approach the cutting surface 2A of the cradle 2. The cut sheet 1 being cut is cut into a cutting part 1A and a scrap part 1B.

  In the sheet cutting apparatus according to the second aspect of the present invention, the moving speed of the conveying belt 5 moved by the conveying mechanism 6 is made faster than the moving speed of the cut sheet 1 moved by the supply mechanism 7.

  In the sheet cutting apparatus according to the third aspect of the present invention, the sheet to be cut 1 is laminated on the cut surface 2A of the cradle 2 via the conveyor belt 5, and the sheet to be cut 1 is cut by the Thomson blade 3. .

  In the sheet cutting apparatus according to the fourth aspect of the present invention, the conveying belt 5 transfers the cut sheet 1 to the cut surface 2A of the cradle 2 and the supply of the first conveying belt 5A. And a second conveyor belt 5B that is disposed on either or both of the side and the discharge side and that transfers the cut sheet 1 in the same direction as the first conveyor belt 5A. In this cutting apparatus, the cut sheet 1 transferred to the cutting surface 2A by the second transport belt 5B is stacked on the first transport belt 5A and cut by the Thomson blade 3.

  In the sheet cutting apparatus according to claim 5 of the present invention, the Thomson blade driving mechanism 4 detects the side edge 1b of the sheet 1 to be cut and is printed on the sheet 1 to be cut. And a horizontal rotation mechanism 4C that is controlled by the position detection unit 25 to rotate the Thomson blade 3 in a horizontal plane including the cut surface 2A of the cradle 2. In this cutting apparatus, the position detection unit 25 detects the side edge 1b of the cut sheet 1 and the side edge of the pattern to control the horizontal rotation mechanism 4C, and the horizontal rotation mechanism 4C cuts the cut surface of the cradle 2 with the Thomson blade 3 The cut sheet 1 is cut in an accurate posture by rotating in a horizontal plane including 2A.

  In the sheet cutting apparatus according to the sixth aspect of the present invention, the position detection unit 25 includes the digital camera 24, and the digital camera 24 detects the side edge 1b of the cut sheet 1 and the side edge of the printed pattern with an image. is doing. Furthermore, in the sheet cutting apparatus according to claim 7 of the present invention, the position detection unit 25 includes a digital camera 24, and the digital camera 24 is cut by the side edge 1 b of the cut sheet 1 and the Thomson blade 3. And are detected.

  In the sheet cutting apparatus according to the eighth aspect of the present invention, the cut sheet 1 is a multilayer plastic sheet formed by laminating and bonding a plurality of plastic films.

  The sheet cutting apparatus according to the present invention has a feature that the sheet to be cut can be accurately and accurately cut with a Thomson blade while increasing the transfer speed of the sheet to be cut and shortening the tact time. That is, the cutting device of the present invention places the sheet to be cut on the conveying belt and transfers it on the cutting surface of the receiving table, and stops the sheet to be cut transferred by the conveying belt on the cutting surface. Without driving the conveyor belt so that it passes at a predetermined speed, and further, while moving the Thomson blade in the transfer direction of the cut sheet transferred by the conveyor belt with the longitudinal feed mechanism of the Thomson blade drive mechanism, This is because the Thomson blade is lowered so as to approach the cut surface of the receiving table, and the cut sheet transferred to the cutting surface of the receiving table is cut. The cutting apparatus having this structure does not stop after the sheet to be cut is transferred to the cut surface of the receiving table as in the conventional apparatus. The cutting device of the present invention cuts the cut sheet by moving the Thomson blade in the transfer direction while moving the cut sheet to the cut surface of the cradle and without stopping the transfer. The cut surface of this structure is cut while continuously transferring the cut sheet without repeating the transfer and stop of the cut sheet. For this reason, the disadvantage of the conventional cutting device, that is, the relative deviation between the cutting portion and the scrap portion, which occurs when the cut sheet is accelerated and decelerated rapidly, is not transferred. There is no wrinkling of the cut sheet. For this reason, the Thomson blade always cuts the cut sheet with a cut surface with high accuracy. Further, since the sheet to be cut is rapidly accelerated and not rapidly decelerated, the sheet to be cut can be cut efficiently with high quality by increasing the speed at which the sheet to be cut is continuously transferred, shortening the tact time.

  In addition, the cutting device of the present invention is characterized in that the sheet to be cut can be reliably separated from the scrap portion while reducing damage to the Thomson blade and the cradle. That is, the cutting device of the present invention transfers the cut sheet to the cutting surface of the cradle with the transport belt and moves the Thomson blade in the transfer direction of the cut sheet transferred by the transport belt. This is because the sheet to be cut that is moved toward the cutting surface and transferred to the cut surface of the cradle is cut. That is, the cutting device of the present invention cuts with the Thomson blade while being transported by the conveyor belt without being stopped at the cut surface of the receiving table. The cut sheet to be cut is transferred by a conveying belt, and the Thomson blade is moved in the transfer direction of the cut sheet by a vertical feed mechanism. While the Thomson blade and the sheet to be cut are moved in the same direction, the sheet to be cut is cut by bringing the Thomson blade close to the cut surface. However, the cut sheet and the Thomson blade are slightly displaced in the transport direction. In particular, the sheet to be cut is transported on the transport belt, but is transported while causing a slight relative displacement with respect to the transport belt. For example, the sheet to be cut is transferred while meandering on the conveyor belt, or transferred while slipping. For this reason, even when the cut sheet is transferred by the transport belt and the Thomson blade is moved in the transfer direction by the vertical feed mechanism, when the Thomson blade cuts the cut sheet, it is between the Thomson blade and the cut sheet. The relative shift in the generated transfer direction cannot be completely eliminated. In the present invention, the to-be-cut sheet is reliably separated from the scrap portion by the relative displacement between the Thomson blade and the to-be-cut sheet in the transfer direction. This is because when the Thomson blade cuts the sheet to be cut and is relatively displaced in the transport direction, this relative displacement widens the cutting line of the Thomson blade.

  In the cutting apparatus according to the second aspect of the present invention, the moving speed of the conveying belt moved by the conveying mechanism is made faster than the moving speed of the sheet to be cut moved by the supplying mechanism, so that the cutting device is cut into a predetermined shape. There is a feature that the cutting part can be more reliably separated from the scrap part. This is because the cutting line of the cutting portion cut by the Thomson blade is forcibly expanded by the conveying belt in order to quickly transfer the scrap portion of the cut sheet from which the conveying belt has been cut.

  Further, in the cutting device according to claim 3 of the present invention, the sheet to be cut is laminated on the cut surface of the cradle via the conveying belt, and the sheet to be cut is cut with the Thomson blade. There is a feature that the cut sheet can be surely cut while preventing damage to the blade edge. This is because the cutting edge of the Thomson blade moves until it slightly bites into the conveying belt, and the cut sheet can be cut.

  According to a fourth aspect of the present invention, there is provided a cutting apparatus comprising: a first conveying belt that transfers a sheet to be cut to a cut surface of a cradle; and one or both of a supply side and a discharge side of the first conveying belt. And a second transport belt that is arranged and transports the cut sheet in the same direction as the first transport belt, so that the first transport belt is fed by the second transport belt to the supplied cut sheet. The sheet to be cut laminated on the first conveying belt can be surely cut with the Thomson blade while being reliably conveyed.

  Furthermore, the cutting device according to claim 5 of the present invention is characterized in that the sheet to be cut that is meandered and conveyed on the conveyor belt can be accurately cut with a Thomson blade. That is, the Thomson blade drive mechanism detects the side edge of the sheet to be cut that is transferred by the conveyor belt, and the position detector controls the Thomson blade within the horizontal plane including the cut surface of the cradle. It has a horizontal rotation mechanism to rotate, the position detection unit detects the side edge of the cut sheet or the side edge of the pattern printed on the cut sheet and controls the horizontal rotation mechanism, and the horizontal rotation mechanism uses the Thomson blade. This is because the Thomson blade is cut in an accurate posture with respect to the sheet to be cut by rotating in a horizontal plane including the cut surface of the cradle.

  According to a sixth aspect of the present invention, there is provided a cutting apparatus for detecting a side edge of a sheet to be cut or a printed pattern as an image with a digital camera, and the cutting apparatus according to a seventh aspect of the present invention is a digital camera. Since the side edge of the sheet to be cut, the side edge of the pattern, and the cutting edge of the Thomson blade are detected and the Thomson blade is rotated on the cut surface, the sheet to be cut can be cut with an accurate posture and position.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments shown below exemplify a sheet cutting apparatus for embodying the technical idea of the present invention, and the present invention does not specify the sheet cutting apparatus as follows.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The sheet cutting apparatus shown in FIGS. 1 to 3 includes a receiving table 2 provided on the upper surface with a cutting surface 2A for cutting the sheet to be cut 1 while being transferred, and a cutting sheet 1 with a cutting surface 2A of the receiving table 2. A Thomson blade 3 for cutting the sheet, a Thomson blade driving mechanism 4 for reciprocating the Thomson blade 3 up and down, a conveying belt 5 for transferring the sheet 1 to be cut, and a conveying mechanism 6 for the conveying belt 5. And a supply mechanism 7 for supplying the cut sheet 1 to the conveyor belt 5.

  The Thomson blade 3 cuts the elongated cut sheet 1 wound in a roll shape from the scrap part 1B as a cut part 1A such as a square. The Thomson blade 3 has a rectangular cutting edge 1A, and thus has a square edge. However, the present invention does not specify the shape of the cutting portion where the Thomson blade cuts the cut sheet as a quadrangle. The Thomson blade can cut the cut sheet so as to cut the polygon cut portion from the scrap portion of the cut sheet, or cut the cut sheet as a cut portion having a circular shape, an oval shape, or other various shapes. Since the Thomson blade 3 cuts the cut sheet 1 with the blade edge and separates it from the scrap portion 1B as the cut portion 1A having a predetermined shape, the edge of the blade has a closed loop shape.

  The cradle 2 has a flat cut surface 2A on the upper surface. The cutting surface 2A of the cradle 2 is larger than the shape of the cutting edge of the Thomson blade 3, and the cut sheet 1 is cut by the cutting edge on the upper surface of the cutting surface 2A. The cut surface 2A is cut by placing the belt-like cut sheet 1 on top. In the cutting apparatus shown in the figure, an underlay belt 8 is disposed on a cut surface 2 </ b> A, the cut sheet 1 is placed on the underlay belt 8, and the cut sheet 1 is cut with a Thomson blade 3. The cradle 2 is fixed and does not move. The cutting apparatus shown in the figure transports the conveyor belt 5 on the cut surface 2 </ b> A, and loads the sheet 1 to be cut on the conveyor belt 5. The conveyor belt 5 slides on the cut surface 2A of the cradle 2. The cut surface 2A is a smooth surface to reduce the frictional resistance with the conveyor belt 5. Furthermore, the cut surface 2A covers a film having a low frictional resistance such as a fluororesin film to reduce the frictional resistance of the conveying belt 5.

  The conveyor belt 5 carries the cut sheet 1 on top. The cutting apparatus shown in FIGS. 1 and 2 is used in combination with an underlay belt 8 for cutting the sheet 1 to be cut by transferring the conveying belt 5 onto the cut surface 2A of the cradle 2. In these cutting apparatuses, the sheet 1 to be cut is placed on the underlay belt 8 and transferred onto the cut surface 2 </ b> A, and the cut sheet 1 is cut on the underlay belt 8. The cutting device of FIG. 1 connects the underlay belt 8 in a loop shape, and circulates this to repeatedly use it. The apparatus of FIG. 2 does not repeatedly use the underlay belt 8, but always places the cut sheet 1 on the new underlay belt 8 and transfers it to the cut surface 2A.

  In the apparatus shown in FIG. 3, the conveyor belt 5 is composed of a first conveyor belt 5A and a second conveyor belt 5B. The first conveyor belt 5A and the second conveyor belt 5B are arranged in a straight line and transport the cut sheet 1 in the same direction. The first conveying belt 5 </ b> A is used in combination with an underlay belt 8 that transfers the cut sheet 1 to the cut surface 2 </ b> A of the receiving table 2. The second conveyor belt 5B is linearly provided on the supply side and the discharge side of the first conveyor belt 5A, and supplies the cut sheet 1 to be cut to the first conveyor belt 5A. The cutting sheet 1 is discharged from the first conveying belt 5A.

  The conveyor belt 5 is transferred by the conveyor mechanism 6 at a constant speed. The conveyance mechanism 6 of the cutting apparatus of FIG. 1 includes four sets of transfer rolls 10 that are hung on a conveyance belt 5 connected in a loop shape, and a motor 11 that drives the transfer rolls 10 at a constant speed. The four sets of transfer rolls 10 are arranged in two at the upper stage and two at the lower stage so as to transfer the loop-shaped conveyor belt 5 at a constant speed with a predetermined tension. The two sets of transfer rolls 10 arranged on the upper stage are on both sides of the cut surface 2A of the cradle 2 and the upper surface is flush with the cut surface 2A so as to transfer the conveyor belt 5 to a horizontal plane including the cut surface 2A. It is arranged. The two sets of transfer rolls 10 arranged in the lower stage are arranged below the upper transfer roll 10 so as to transfer the loop-shaped conveyance belt 5 to the lower side of the cut surface 2A. The transport mechanism 6 in FIG. 1 drives an upper transfer roll 10 on the discharge side of the cut surface 2 </ b> A by a motor 11. However, the transport mechanism of the transport belt can drive the upper two transport rolls by one or two motors, or can drive all the transport rolls by one or a plurality of motors. A motor 11 that drives the transfer roll 10 transfers the conveying belt 5 at a constant speed, and transfers the cut sheet 1 placed on the conveying belt 5 at a constant speed.

  The conveying mechanism 6 of the cutting apparatus shown in FIG. 2 includes two sets of transfer rolls 10 disposed on both sides of the cut surface 2A of the cradle 2 and windings disposed below the discharge side of the cradle 2. A take-up roll 12 and motors 11 and 13 for driving the transfer roll 10 and the take-up roll 12 are provided. The two sets of transfer rolls 10 are arranged on both sides of the cut surface 2A of the cradle 2 and have the upper surface disposed on the same plane as the cut surface 2A so as to transfer the conveyor belt 5 to a horizontal surface including the cut surface 2A. Yes. The transport mechanism 6 is configured to drive the transport roll 10 on the discharge side of the cradle 2 or the transport rolls 10 arranged on both sides of the cradle at a constant speed by a motor 11 so that the transport belt 5 Transfer to the cut surface 2A at a constant speed. The conveyor belt 5 that has passed through the cradle 2 is wound around the winding roll 12 with a certain tension. The take-up roll 12 is connected to a motor 13 through a clutch, and takes up the transport belt 5 that has passed through the cradle 2 with a constant tension. The winding roll 12 is disposed below the transfer roll 10 disposed on the discharge side of the cut surface 2A. The transport mechanism 6 in FIG. 2 drives the transfer roll 10 and the take-up roll 12 with motors 11 and 13. However, this conveyance mechanism can also drive only a winding roll with a motor so that a conveyance belt may be conveyed at a fixed speed.

  Furthermore, the transport mechanism 6 of FIG. 3 includes a first transport mechanism 6A that transports the first transport belt 5A and a second transport mechanism 6B that transports the second transport belt 5B. The first transport mechanism 6A includes a capstan roll 14 that makes the transfer speed constant across the first transport belt 5A, a take-up roll 12 of the first transport belt 5A that has passed through the cut surface 2A, and a capstan roll 14 And motors 15 and 13 for driving the winding roll 12. The capstan roll 14 is on the supply side of the cut surface 2A of the cradle 2 and transfers the first conveying belt 5A to the cut surface 2A at a constant speed. The take-up roll 12 takes up the first conveyor belt 5A via a clutch. The winding roll 12 is disposed below the discharge side of the cut surface 2A. The first transport mechanism 6 </ b> A drives the winding roll 12 and the capstan roll 14 with motors 13 and 15. The take-up roll 12 winds up the first conveyor belt 5A faster than the capstan roll 14, and the transfer speed of the first conveyor belt 5A is controlled by the capstan roll 14. The first transport mechanism 6A having this structure can transfer the first transport belt 5A to the cutting surface 2A at an accurate speed by the capstan roll 14. The winding roll 12 winds the first conveyor belt 5A that has passed through the cut surface 2A with a constant tension. The 1st conveyance mechanism can also control the transfer speed of the 1st conveyance belt with a winding roll, without using a capstan roll.

  The second transport mechanism 6B drives the upper four transport rolls 10, the intermediate two transport rolls 10, the lower two transport rolls 10, and any one or a plurality of transport rolls 10 at a constant speed. And a motor 11 that moves the second conveyor belt 5B at a constant speed. The upper four transfer rolls 10 are arranged on the same surface as the cut surface 2A, with two on the supply side and two on the discharge side of the cradle 2. The transfer rolls 10 disposed on both sides of the cradle 2 transfer the second conveyor belt 5B to the outside of the first conveyor belt 5A. The intermediate transfer roll 10 guides and transfers the second conveyor belt 5B to the outside of the first conveyor belt 5A. In other words, the first conveyor belt 5A is moved inside the second conveyor belt 5B. Further, the two lower-stage transfer rolls 10 transfer the second transfer belt 5B further below the portion where the second transfer belt 5B is transferred by the intermediate transfer roll 10.

  The second transport mechanism 6B having this structure drives the upper transport roll 10 by the motor 11 to transport the second transport belt 5B at a constant speed. However, in the second transport mechanism, the upper four transport rolls are driven by one or a plurality of motors, and the other transport rolls are driven by the same motor or another motor, and the second transport belt is driven. Can be transported at a constant speed.

  The cut sheet 1 is supplied to the conveyor belt 5 by the supply mechanism 7. The supply mechanism 7 of the cutting apparatus shown in the figure includes a major roll 16 of the sheet to be cut 1, a fixed-size feed roll 17, and a motor 18 that drives the fixed-size feed roll 17 at a constant speed. The major roll 16 sandwiches the cut sheet 1 with a pair of rolls and detects the transfer speed of the cut sheet 1. The fixed-size feed roll 17 also sandwiches the cut sheet 1 with a pair of rolls, and is driven by a motor 18 to transfer the cut sheet 1 at a constant speed.

  The cutting device makes the moving speed of the conveying belt 5 moved by the conveying mechanism 6 faster than the moving speed of the cut sheet 1 moved by the supply mechanism 7. This cutting apparatus can reliably cut the cutting part 1A cut into a predetermined shape by the Thomson blade 3 from the scrap part 1B of the cut sheet 1. The apparatus shown in the figure has a structure in which the conveyance mechanism 6 and the supply mechanism 7 are driven by individual motors 11 and 18 provided separately, and the transfer speeds of the respective conveyance belts 5 and the cut sheet 1 can be controlled separately. . In the cutting apparatus having this structure, the transfer speed of the conveyance belt 5 is controlled by the motor 11 of the conveyance mechanism 6, and the transfer speed of the cut sheet 1 is controlled by the motor 18 of the supply mechanism 7. Since the cutting device in which the motors 18 and 11 of the supply mechanism 7 and the transport mechanism 6 are separately provided can control the transfer speed of the transport belt 5 and the sheet 1 to be cut, it is ideal to separate the cut sheet 1 that has been cut. It can be adjusted to the state. However, the cutting apparatus of the present invention drives the conveyance mechanism and the supply mechanism with a single motor, and the movement speed of the conveyance belt moved by the conveyance mechanism is higher than the movement speed of the sheet to be cut moved by the supply mechanism. It can also be faster. In this cutting device, the rotation shaft of one motor is connected to the rotation shafts of the transport mechanism and the supply mechanism via gears, a power transmission mechanism such as a chain and a sprocket, and both the supply mechanism and the transport mechanism are predetermined. Drive at speed.

  The Thomson blade drive mechanism 4 reciprocates the Thomson blade 3 up and down to cut the cut sheet 1 at the cut surface 2A of the cradle 2. The Thomson blade drive mechanism 4 moves the Thomson blade 3 in the transfer direction of the cut sheet 1 and the vertical mechanism 4A that lowers the Thomson blade 3 toward the cut surface 2A to cut the cut sheet 1 into a predetermined shape. A vertical feed mechanism 4B and a horizontal rotation mechanism 4C that rotates the Thomson blade 3 in a horizontal plane are provided.

  The vertical mechanism 4 </ b> A includes a vertical cylinder 21 that is connected to the Thomson blade 3 and moves up and down, and a control circuit 22 for the vertical cylinder 21. The control circuit 22 detects the transfer distance of the cut sheet 1 by the transfer distance sensor 23, and controls the upper and lower cylinders 21 to drive the Thomson blade 3 up and down so as to cut the cut sheet 1 at a predetermined interval. . The transfer distance sensor 23 detects the transfer distance of the cut sheet 1, and the cutting apparatus shown in FIGS. 1 and 2 detects the transfer distance of the cut sheet 1 using the measure roll 16 as the transfer distance sensor 23. The cutting apparatus of FIG. 3 detects the transfer distance of the cut sheet 1 using the capstan roll 14 as the transfer distance sensor 23.

  Furthermore, as shown in FIGS. 4 and 5, the cutting device of the present invention includes a transfer distance sensor 23 of an optical sensor that detects the position of the cutting edge 1 a that has been cut from the cut sheet 1. The optical sensor is a digital camera 24. As this digital camera 24, for example, a CCD camera can be used. The transfer distance sensor 23 includes a calculation circuit (not shown) that calculates a video signal output from a CCD camera, which is a digital camera 24, and detects the position of the cutting edge 1a that has been cut first. This transfer distance sensor 23 detects the cutting edge 1a cut first, and calculates the transfer distance of the sheet 1 to be cut. From the position of the cutting edge 1a, the position where the Thomson blade 3 cuts the cut sheet 1 is specified. This is because the cut sheet 1 is cut into a predetermined shape at a constant interval (L). The cutting device including the transfer distance sensor 23 of the optical sensor 24 detects the transfer distance of the cut sheet 1 with the measure roll 16 and the capstan roll 14, and further, the cutting position of the Thomson blade 3 with the transfer distance sensor 23 made of an optical sensor. The sheet 1 to be cut can be cut most accurately at a constant interval (L).

  The vertical feed mechanism 4 </ b> B moves the Thomson blade 3 in the transfer direction of the cut sheet 1 when the vertical mechanism 4 </ b> A lowers the Thomson blade 3. The Thomson blade 3 lowered by the vertical mechanism 4A while being moved in the transfer direction of the cut sheet 1 by the vertical feed mechanism 4B is cut by the Thomson blade 3 while being transferred without stopping the transfer of the cut sheet 1. Sheet 1 is cut.

  Further, the Thomson blade drive mechanism 4 of FIG. 4 detects a side edge 1b of the cut sheet 1 conveyed by the conveyor belt 5, or a side edge of a pattern printed on the cut sheet (not shown). 25 and a horizontal rotation mechanism 4C that is controlled by the position detection unit 25 and rotates the Thomson blade 3 in a horizontal plane including the cut surface 2A of the cradle 2.

  4 and 5 includes an axial direction control mechanism 26 such as a pair of cylinders connected to both ends of the Thomson blade 3. The axial direction control mechanism 26 can control the axial position of the rod 27 connected to the Thomson blade 3. The axial direction control mechanism 26 is a cylinder such as a hydraulic cylinder or a motor cylinder. The hydraulic cylinder controls the position of the rod by controlling the oil supplied to the cylinder. The motor cylinder controls the position of the rod by controlling the rotation of the motor. Further, the axial direction control mechanism can be constituted by a screw rod, a nut, and a motor. This axial direction control mechanism rotates a screw rod with a motor and moves a nut engaged with the screw rod in the axial direction. The nut is arranged so that it does not rotate but can move axially along the threaded rod. The pair of axial control mechanisms 26 controls the horizontal rotation angle of the Thomson blade 3 by controlling the position of the rod 27.

  The position detection unit 25 detects the side edge 1b of the cut sheet 1 and the side edge of the pattern and controls the axial direction control mechanism 26 of the horizontal rotation mechanism 4C. The cut sheet 1 is cut with the Thomson blade 3 in an accurate posture with respect to the cut sheet 1 by rotating in a horizontal plane including the cut surface 2A. The position detection unit 25 includes a digital camera 24. As this digital camera 24, a CCD camera can be used. The digital camera 24 detects the side edge 1b of the cut sheet 1 and the printed pattern as an image. The output of the digital camera 24 is output to an arithmetic circuit (not shown). This arithmetic circuit calculates the side edge 1 b of the cut sheet 1 and the side edge of the pattern from the video signal input from the digital camera 24.

  The cutting device having this structure cuts the sheet 1 to be cut while being meandering on the conveyor belt 5 with a Thomson blade 3 into a predetermined shape with an accurate posture and position. 4 and 5 can adjust the interval (L) for cutting the cut sheet 1 by controlling the pair of axial control mechanisms 26 with the transfer distance sensor 23. FIG. This cutting apparatus detects, for example, the transfer distance of the cut sheet 1 with the measure roll 16 or the capstan roll 14, further detects the transfer length of the cut sheet 1 with the transfer distance sensor 23, and further transfers the transfer distance sensor. By controlling the pair of axial direction control mechanisms 26 with the signal 23, the cut sheet 1 can be cut at a predetermined interval with extremely high accuracy. In this cutting apparatus, by controlling the pair of axial direction control mechanisms 26 with the transfer distance sensor 23, the cutting sheet 1 can be cut with high accuracy by correcting the interval for cutting the cut sheet 1.

  The above cutting apparatus supplies the cut sheet 1 on the conveyor belt 5 by the supply mechanism 7 and accurately cuts it into a specific shape at a predetermined interval by the Thomson blade 3. The conveyor belt 5 transfers the cut sheet 1 to the cut surface 2 </ b> A of the receiving table 2. The cut sheet 1 to be transferred has a transfer distance detected by a transfer distance sensor 23. The position where the Thomson blade 3 cuts the cut sheet 1 is specified from the transfer distance. The Thomson blade driving mechanism 4 corrects the meandering of the cut sheet 1 by the horizontal rotation mechanism 4C while moving the Thomson blade 3 in the transfer direction of the cut sheet 1 so that the cutting position becomes a specific position. The sheet to be cut 1 is cut by being lowered toward the cut surface 2A of the cradle 2 by the vertical mechanism 4A. The unique structure of cutting with the Thomson blade 3 while transporting the cut sheet 1 moves the Thomson blade 3 and the cut sheet 1 relative to each other. This is because both the Thomson blade 3 and the sheet 1 to be cut are moving, so that they cannot be transported in the same direction and at the same speed by completely matching them. The relative movement of the Thomson blade 3 and the sheet 1 to be cut acts to reliably cut the sheet 1 to be cut at the cutting edge 1a. This is because the Thomson blade 3 moves relative to the cut sheet 1 so that the Thomson blade 3 separates the cutting edge 1a.

  Further, the cutting device described above also expands the cutting edge 1a cut by the Thomson blade 3 by transferring the conveying belt 5 faster than the supply mechanism 7 transfers the sheet 1 to be cut. 1A is surely cut off from the scrap part 1B.

1 is a schematic configuration diagram of a sheet cutting device according to an embodiment of the present invention. It is a schematic block diagram of the sheet | seat cutting device concerning the other Example of this invention. It is a schematic block diagram of the sheet | seat cutting device concerning the other Example of this invention. It is a schematic plan view which shows the horizontal rotation mechanism of a Thomson blade drive mechanism. FIG. 5 is a schematic plan view showing a state in which the horizontal rotation mechanism shown in FIG. 4 controls the position of the Thomson blade.

Explanation of symbols

1 ... Cutting sheet 1A ... Cutting part
1B ... scrap section
1a: Cutting edge
DESCRIPTION OF SYMBOLS 1b ... Side edge 2 ... Base 2A ... Cut surface 3 ... Thomson blade 4 ... Thomson blade drive mechanism 4A ... Vertical mechanism
4B ... Vertical feed mechanism
4C ... Horizontal rotation mechanism 5 ... Conveyor belt 5A ... First conveyer belt
5B ... 2nd conveyance belt 6 ... Conveyance mechanism 6A ... 1st conveyance mechanism
6B ... Second transport mechanism 7 ... Supply mechanism 8 ... Underlay belt 10 ... Transfer roll 11 ... Motor 12 ... Winding roll 13 ... Motor 14 ... Capstan roll 15 ... Motor 16 ... Measure roll 17 ... Constant feed roll 18 ... Motor DESCRIPTION OF SYMBOLS 21 ... Upper and lower cylinder 22 ... Control circuit 23 ... Transfer distance sensor 24 ... Digital camera 25 ... Position detection part 26 ... Axial direction control mechanism 27 ... Rod

Claims (8)

A cradle (2) having a flat cut surface (2A) on the upper surface for cutting the cut sheet (1) drawn out from the rolled state, and a cut surface (2A) of the cradle (2) A Thomson blade (3) that cuts the sheet (1) to be cut into a predetermined shape cutting portion (1A), and a Thomson blade drive mechanism that reciprocates the Thomson blade (3) up and down ( 4), and a sheet cutting device that reciprocates the Thomson blade (3) with the Thomson blade drive mechanism (4) and cuts the cut sheet (1) at the cutting surface (2A) of the cradle (2) Because
A conveyor belt (5) that carries the sheet to be cut (1) placed thereon and the sheet to be cut (1) that is transferred by the conveyor belt (5) are formed on the cut surface (2A) of the cradle (2). The conveyor mechanism (6) that drives the conveyor belt (5) to pass through the conveyor belt (5) without stopping at a predetermined speed, and to be cut on the conveyor belt (5) transferred by the conveyor mechanism (6) A supply mechanism (7) for supplying the sheet (1) at a predetermined speed,
The Thomson blade drive mechanism (4) includes a vertical feed mechanism (4B) that moves the Thomson blade (3) in the transfer direction of the cut sheet (1) transferred by the conveyor belt (5). In 4B), the Thomson blade (3) is moved in the transfer direction of the sheet (1) to be cut, and the Thomson blade (3) is lowered so as to approach the cut surface (2A) of the cradle (2). A sheet cutting apparatus configured to cut a cut sheet (1) transferred to a cut surface (2A) of a table (2) into a cutting section (1A) and a scrap section (1B).   The sheet cutting according to claim 1, wherein the moving speed of the conveying belt (5) moved by the conveying mechanism (6) is faster than the moving speed of the cut sheet (1) moved by the supply mechanism (7). apparatus.   The cut sheet (1) is laminated on the cut surface (2A) of the cradle (2) via the conveyor belt (5), and the cut sheet (1) is cut with the Thomson blade (3). The sheet cutting device described in 1.   The first conveyor belt (5A) for transferring the cut sheet (1) to the cut surface (2A) of the cradle (2) and the supply side of the first conveyor belt (5A) And a second conveyor belt (5B) that is disposed on either or both of the discharge side and transports the cut sheet (1) in the same direction as the first conveyor belt (5A), The cut sheet (1) transferred to the cut surface (2A) by the conveying belt (5B) is stacked on the first conveying belt (5A) and cut by the Thomson blade (3). The sheet cutting device according to claim 1. Thomson blade drive mechanism (4) detects the side edge (1b) of the cut sheet (1) transferred by the conveyor belt (5), or the side of the pattern printed on the cut sheet (1) And a horizontal rotation mechanism that is controlled by the position detection unit (25) and rotates the Thomson blade (3) in a horizontal plane including the cut surface (2A) of the cradle (2). (4C)
The position detection unit (25) detects the side edge (1b) of the cut sheet (1) or the side edge of the pattern printed on the cut sheet (1) and controls the horizontal rotation mechanism (4C). The horizontal rotation mechanism (4C) rotates the Thomson blade (3) in a horizontal plane including the cut surface (2A) of the cradle (2) so that the Thomson blade (3) is accurate with respect to the cut sheet (1). The sheet cutting device according to claim 1, wherein the sheet cutting device is configured to cut as a posture.   The position detection unit (25) includes a digital camera (24), and the digital camera (24) detects the side edge (1b) of the cut sheet (1) and the side edge of the printed pattern with an image. Sheet cutting device to be described.   The position detection unit (25) includes a digital camera (24), and the digital camera (24) includes a side edge (1b) of the cut sheet (1) and a cutting edge (1a) cut by a Thomson blade (3). The sheet cutting device according to claim 5, wherein the sheet cutting device is detected. The sheet cutting device according to claim 1, wherein the sheet to be cut (1) is a multilayer plastic sheet formed by laminating and bonding a plurality of plastic films.

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