JP4592808B1 - Cutting device - Google Patents

Abstract

An operator can accurately recognize a distortion of a sheet material, and therefore the sheet material can be cut along a cutting pattern corresponding to the distortion of the sheet material. As a result, a pattern piece with less distortion is obtained. To provide a cutting device.
A cutting apparatus includes a cutting table, a reversing apparatus, a projection control apparatus, and a projector. The grid 6 is projected by the projector 5 onto the surface of the fabric 7 placed on the support surface 21 of the cutting table 2. The controller 41 is operated by an operator who visually recognizes the grid 6, the positions of the adjustment points P <b> 1 to P <b> 9 of the grid 6 are adjusted, and the grid 6 is deformed so as to follow the pattern of the fabric 7. The cutting patterns 75 and 76 are deformed corresponding to the deformed grid 6 and projected onto the surface of the fabric 7. The positions and angles of the cutting patterns 75 and 76 are adjusted, and the fabric 7 is cut into a shape along the cutting patterns 75 and 76.
[Selection] Figure 1

Description

  The present invention relates to a cutting apparatus for cutting a pattern piece without distortion from a sheet material having distortion.

  There is a plotter type cutting device as a cutting device for cutting a cloth for clothing to produce a pattern piece. This type of cutting apparatus includes a cutting table having a support surface that supports the fabric, and a cutting unit that incorporates a cutting blade and is driven in a planar direction on the support surface of the cutting table. In this cutting apparatus, cutting data representing a cutting pattern of a pattern piece is input, and on the basis of the cutting data, the cutting blade is operated while driving the cutting unit to cut the fabric, thereby producing a pattern piece. ing.

  In many cutting apparatuses, a cloth having a length necessary for a series of cutting processes is drawn out and placed on a cutting table from a roll body in which the cloth is wound in a roll shape. Here, the fabric is placed in a state including distortion due to the state of the roll body or the tension acting when unwinding from the roll body. In the pattern piece obtained by cutting the fabric including the distortion, the stress forming the distortion disappears by the cutting, and becomes an incorrect shape different from the cutting pattern. When an illegally shaped pattern piece is put into the sewing process, a pattern shift occurs between the pattern piece and another pattern piece, and the shape of the clothing becomes defective.

  Therefore, conventionally, a camera is mounted on a cutting unit of a plotter-type cutting device, and a cloth pattern is photographed by the camera while driving the cutting unit to scan the cloth, and the photographed cloth pattern is displayed on the display device. A cutting device has been proposed (see Patent Document 1). The cutting device displays a fabric pattern on a display device so that an operator can visually recognize the pattern, and receives an input specifying the position of the fabric distortion from the operator. Based on this input, the distortion of the fabric pattern is removed by image processing, and the fabric pattern without distortion is displayed on the display device. Next, an input designating the position of the cutting pattern is received from an operator who has viewed the display device, and the position where the pattern piece is to be cut from the fabric is adjusted.

JP 2003-166165 A

  However, since the conventional cutting apparatus displays an image obtained by capturing a pattern of the fabric on the display device, it is difficult for the display device to be distorted depending on the pattern, and it is difficult for the operator to recognize the distortion, and it is difficult to specify the distortion. There are cases. In addition, the cloth pattern whose distortion has been corrected by image processing is displayed on the display device, and the operator designates the position of the cutting pattern by visually recognizing the display device. Therefore, the position of the cutting pattern on the actual cloth is displayed to the operator. There is a problem that it is difficult to grasp.

  Therefore, an object of the present invention is to allow the operator to accurately recognize the distortion of the sheet material, and therefore, the sheet material can be cut along a cutting pattern corresponding to the distortion of the sheet material. It is providing the cutting device from which a pattern piece is obtained. It is another object of the present invention to provide a cutting apparatus that can grasp the position of a cutting pattern in an actual sheet material.

In order to solve the above problems, the cutting device of the present invention is:
A support surface for supporting the sheet material;
The surface of the sheet material on the support surface, a cutting pattern shape and arrangement is changed, a pattern projection means for projecting a reference pattern deformed in accordance with the pattern or texture of the sheet material,
An input unit that receives input from the operator;
Based on an input by the operator to the input unit, a reference pattern deforming unit that deforms the reference pattern projected on the surface of the sheet material so as to follow the pattern or texture of the sheet material on the support surface;
Cutting pattern deformation means for deforming the shape of the cutting pattern so as to correspond to the reference pattern deformed by the reference pattern deformation means;
An arrangement changing unit that changes the arrangement state in the sheet material of the cutting pattern that is deformed by the cutting pattern deforming unit and is projected onto the surface of the sheet material by the pattern projecting unit;
And a cutting means for cutting the sheet material so as to follow the cutting pattern deformed by the cutting pattern deforming means and changed in the arrangement state by the arrangement changing means .

According to the above configuration, the sheet material is supported on the support surface, and the cutting pattern and the reference pattern are projected onto the surface of the sheet material by the pattern projecting unit. As the pattern projection means, for example, a projection display device such as a projector can be used. Based on the input to the input unit by the operator, the reference pattern projected on the surface of the sheet material is deformed by the reference pattern deforming means so as to follow the pattern or texture of the sheet material on the support surface. The shape of the cutting pattern is deformed by the cutting pattern deforming means so as to correspond to the reference pattern deformed by the reference pattern deforming means. Thereby, the cutting pattern is deformed into a shape corresponding to the distortion of the sheet material. Further, the arrangement changing unit changes the arrangement state of the cutting pattern in the sheet material which is deformed by the cutting pattern deformation unit and is projected on the surface of the sheet material by the pattern projection unit. Thereafter, the sheet material is cut by the cutting means so as to follow the cutting pattern which is deformed by the cutting pattern deforming means and whose arrangement state is changed by the arrangement changing means . The sheet material is cut along a cutting pattern deformed according to the distortion in a state where the distortion exists. Therefore, the pattern piece obtained by cutting the sheet material having distortion is cut off from other parts of the sheet material to eliminate distortion, and has an appropriate shape.

  The operator who operates the input unit performs input to the input unit while visually recognizing the reference pattern projected on the surface of the sheet material, so that the reference pattern deforming unit follows the pattern or texture of the sheet material. Deform the reference pattern. Therefore, the operator can perform input while directly viewing the pattern and texture of the sheet material, so that the distortion of the sheet material can be corrected more accurately than when viewing the photographed image of the sheet material displayed on the display device. Can be recognized. Further, since the reference pattern deformed according to the input to the input unit by the operator is directly projected on the surface of the sheet material, the reference pattern can be accurately deformed so as to follow the distortion of the sheet material. Therefore, the distortion of the sheet material can be specified with good accuracy.

In addition, by changing the arrangement state of the cutting pattern deformed by the cutting pattern deforming unit corresponding to the distortion by the arrangement changing unit, a pattern piece can be appropriately obtained from the sheet material having distortion. Thereby, for example, it is possible to perform pattern matching of pattern pieces that are cut along the cutting pattern, or cutting that avoids defective portions of the sheet material. The arrangement state of the cutting pattern means the position in the width direction and the length direction where the cutting pattern is arranged, and the angle around the normal line of the sheet material of the cutting pattern.

  In the cutting apparatus according to an embodiment, the reference pattern has a width direction reference line extending in a width direction of the sheet material, and the reference pattern deforming unit is arranged on a straight line in the width direction if there is no distortion. The sheet material is bent so as to pass through a plurality of points on the sheet material.

  According to the above-described embodiment, the reference pattern width direction reference line is bent by the reference pattern deforming means so as to pass through a plurality of points on the sheet material that should be positioned on a straight line in the width direction if there is no distortion. Thereby, it is possible to specify the distortion that often occurs in the sheet material drawn from the roll body, and the distortion in which a plurality of points that should be positioned on a straight line in the width direction are shifted in the length direction with good accuracy. it can. Here, the length direction corresponds to the direction in which the sheet material is pulled out from the roll body.

  In the cutting apparatus according to an embodiment, the reference pattern has a length direction reference line extending in a length direction of the sheet material, and the reference pattern deforming unit has a length in the length direction if there is no distortion. The sheet material is bent so as to pass through a plurality of points on the sheet material to be positioned on a straight line in the direction.

  According to the embodiment, the reference pattern length direction reference line is bent by the reference pattern deforming means so as to pass through a plurality of points on the sheet material that should be positioned on a straight line in the length direction if there is no distortion. The As a result, it is possible to specify the distortion in which a plurality of points that should be positioned on a straight line in the length direction are shifted in the width direction with good accuracy.

  In the cutting apparatus according to one embodiment, the reference pattern is formed in a grid shape having a plurality of width direction reference lines and a plurality of length direction reference lines.

  According to the above embodiment, the distortion of the sheet material can be specified with high accuracy by deforming both the width direction reference line and the length direction reference line of the reference pattern by the reference pattern deforming means.

It is a figure which shows the cutting device of embodiment of this invention. It is a top view which shows a mode that the grid was projected on the support surface. It is a top view which shows a mode that the cutting pattern was projected on the support surface. It is a top view which shows a mode that the fabric which has distortion was mounted in the support surface. It is a block diagram which shows the control apparatus and projection control apparatus of the cutting table of a cutting device. It is a flowchart which shows operation | movement of a cutting device. It is a top view which shows a mode that the grid was projected on the surface of the fabric on a mounting surface. It is a top view which shows the process of changing a grid along the pattern of a fabric. It is a top view which shows a mode that adjustment of the grid was completed. It is a figure which shows a mode that the cutting pattern deform | transformed corresponding to the grid was projected on the surface of the fabric.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  The cutting device according to an embodiment of the present invention is a plotter-type cutting device that cuts fabric and produces a pattern piece of clothing. As shown in FIG. 1, the cutting device 1 includes a cutting table 2, a reversing device 3, a projection control device 4, and a projector 5.

  The cutting table 2 includes a support surface 21 that supports the fabric 7 as a sheet material, and is configured to cut the fabric 7 along a cutting pattern by a cutting unit 22 driven on the support surface 21. . The support surface 21 is formed in a brush shape by planting flexible bristles, and the fabric 7 is sucked through the brush-shaped support surface 21 by a vacuum pump (not shown) to fix the fabric 7. Is formed. A table origin and coordinates used when driving the cutting unit 22 are set on the support surface 21. Hereinafter, the case where the X axis is set in the width direction of the support surface 21 and the Y axis is set in the longitudinal direction will be described.

  The cutting unit 22 includes two carriers 23, 23 that move in the longitudinal direction (Y-axis direction) along both edges in the width direction of the cutting table 2, and a rail 24 that is spanned between the carriers 23, 23. And a cutter head 25 that moves in the width direction (X-axis direction) along the rail 24. The cutter head 25 is formed so as to cut the fabric 7 by the shearing action of the rotary blade on the front surface side and the lower blade on the back surface side. Note that the cutter head 25 may be one that cuts the fabric 7 by reciprocating a saw-shaped cutter, and various cutting methods according to the type and number of the fabrics 7 can be set.

  The spreader 3 is formed so as to move in the longitudinal direction (Y-axis direction) of the cutting table 2, pulls out the fabric from the roll body 31 held at the end of the cutting table 2, and cuts it to a predetermined size. It is formed so that the fabric 7 is created and conveyed to the support surface 21. In the present embodiment, the case where the single-layer fabric 7 is arranged on the support surface 21 and cutting is described. However, the creation and transportation of the fabric 7 by the spreader device 3 are repeated, and the support surface 21 is repeatedly formed on the support surface 21. A plurality of fabrics 7 can be laminated and cut.

  The projection control device 4 controls the grid 6 as a reference pattern to be projected onto the fabric 7 on the support surface 21 of the cutting table 2 and the cutting pattern, and is configured by a commercially available notebook type PC (personal computer). Has been. The projection control device 4 is connected to a controller 41 as an input unit operated by an operator. The controller 41 receives input for adjusting the grid 6 and for adjusting the position and rotation angle of the cutting pattern from the operator. As the controller 41, a commercially available game controller can be used. The projection control device 4 includes a display 42, displays the same grid 6 and cutting pattern as those projected onto the fabric 7 by the projector 5 described later, and displays information related to the grid 6 and the cutting pattern. The projection control device 4 is connected to a control device (not shown) of the cutting table 2 and exchanges information related to the cutting pattern.

  The projector 5 is a pattern projection unit that projects the grid 6 and the cutting pattern onto the fabric 7 on the support surface 21 of the cutting table 2, and is configured by a commercially available liquid crystal projector. The projector 5 projects a cutting pattern in actual size on the entire surface of the support surface 21 having a width of about 1.6 m and a length of about 2.5 m, and has a height of about 1.5 m from the support surface 21. Is installed. In addition to the liquid crystal projector, the projector 5 may use other projectors such as a DLP (digital light processing) projector, and various projection display devices can be used. Therefore, a light valve type projector is preferable.

  When the fabric 7 is disposed on the support surface 21 of the cutting table 2 by the spreader 3, the grid 6 is displayed and adjusted by the projection controller 4 under the operation of the operator. FIG. 2 is a plan view schematically showing a state in which the grid 6 is projected onto the support surface 21. As shown in FIG. 2, the grid 6 includes a plurality of X grid lines X 1, X 2,... X 12 extending in the width direction of the support surface 21 and arranged at equal intervals in the longitudinal direction, A plurality of Y grid lines Y1, Y2,... Y9 extending in the longitudinal direction and arranged at equal intervals in the width direction. The X grid line and the Y grid line are arranged orthogonal to each other in the initial state. A table origin P0, which is a reference for driving the cutting unit 22, is set at the intersection of the first X grid line X1 and the first Y grid line Y1. In the sixth X grid line X6, adjustment points P1 to P9 for deforming the grid 6 according to the distortion of the fabric 7 are set at intersections with the Y grid line. By inputting to the controller 41 by the operator, it is possible to select predetermined adjustment points P1 to P9 and move the positions of the selected adjustment points P1 to P9 independently by an arbitrary distance in the Y-axis direction. Yes. The adjustment point may be set along any X grid line or may be set along the Y grid line.

  FIG. 3 is a plan view showing a state in which the cutting patterns 75 and 76 to be cut on the fabric 7 are projected onto the support surface 21, and FIG. 4 shows the fabric 7 placed on the support surface 21. FIG. In the fabric 7 of FIG. 4, due to the manufacturing process of the roll body 31 and the drawing process by the spreader device 3, distortion is generated in which the center part in the width direction is shifted in the drawing direction from both ends. The cloth 7 has a linear handle 71 that extends straight in the width direction in the absence of strain. However, the strain in the cloth 7 causes the linear handle 71 to have a central portion in the width direction that is longer than both ends. It bulges in the pull-out direction.

  FIG. 5 is a block diagram showing a cutting table control device 26 that controls the operation of the cutting table 2, the projection control device 4, the projector 5, and the controller 41. The cutting table control device 26 includes a marker data input unit 27 into which marker data of clothing is input, and a cutting data creation unit 28 that creates cutting data from the marker data. The marker data is composed of information indicating the shape of the pattern piece to be cut from the fabric 7. The cutting data is configured by information that causes the cutting unit to perform cutting in order to produce a pattern piece. The cutting table control device 26 further includes a cutting data adjustment unit 29 that adjusts the cutting data so as to perform cutting with the shape, position, and rotation angle determined by the projection control device 4. Based on the cutting data adjusted by the cutting data adjustment unit 29, the cutting unit control unit 30 drives the cutting unit 22 to cut the fabric 7.

  The cutting table control device 26 may be built in the cutting table 2. Further, only the cutting unit control unit 30 of the cutting table control device 26 is built in the cutting table 2, while the marker data input unit 27, the cutting data creation unit 28, and the cutting data adjustment unit 29 of the cutting table control device 26 are provided. You may mount in the computer which comprises the projection control apparatus 4. FIG. Thereby, the process regarding adjustment of the data of a cutting pattern can be integrated, and a cutting data processing apparatus can be comprised. By connecting this cutting data processing apparatus to an existing cutting apparatus having only a cutting function, an adjustment function of a cutting pattern corresponding to the distortion of the fabric 7 can be added to the existing cutting apparatus. In addition, the marker data input unit 27, the cutting data creation unit 28, the cutting data adjustment unit 29, and the cutting unit control unit 30 of the cutting table control device 26, the grid display adjustment unit 43, the coordinate conversion unit 44, and the projection of the projection control device 4 Each of the data creation unit 45 and the projection data adjustment unit 46 can be realized by executing software on a computer, but may be realized by a dedicated circuit that exclusively exhibits each function.

  The projection control device 4 includes a grid display adjustment unit 43 that performs grid adjustment based on an input from the operator to the controller 41. The grid display adjustment unit 43 receives from the controller 41 designation of adjustment points P1 to P9 to be adjusted, and inputs of displacement directions and displacement amounts of the adjustment points P1 to P9. The grid 6 is adjusted by applying the input displacement direction and displacement to all the intersections passing through the X grid line to which the adjustment points P1 to P9 related to the input belong. That is, the grid display adjustment unit 43 functions as a reference pattern deformation unit of the present invention.

  When the grid 6 is adjusted by the grid display adjustment unit 43, the coordinate conversion unit 44 processes projection data for projecting the cutting pattern onto the support surface 21. Based on an operator input to the grid display adjustment unit 43, the coordinate conversion unit 44 calculates a coordinate conversion parameter that leads the adjusted grid 6 from the unadjusted grid 6, and sends the parameter to the projection data creation unit 45. Output.

  The projection data creation unit 45 of the projection control device 4 receives the cutting data from the cutting data creation unit 28 of the cutting table control device 26, and creates projection data from the received cutting data. The projection data created by the projection data creation unit 45 is output to the projector 5, and the projector 5 projects the cutting patterns 75 and 76 corresponding to the projection data onto the fabric 7. The projection data output from the projection data creation unit 45 is converted by the coordinate conversion unit 44 with parameters corresponding to the adjustment of the grid 6. Thereby, the shape of the cutting patterns 75 and 76 is adjusted similarly to the grid 6, and is projected onto the fabric 7 on the support surface 21. In this way, the coordinate conversion unit 44 and the projection data creation unit 45 function as the cutting pattern deformation unit of the present invention.

  The cutting data 75 and 76 adjusted in accordance with the adjustment of the grid 6 can be adjusted in position and angle on the fabric 7 by the projection data adjusting unit 46. The projection data adjustment unit 46 adjusts the coordinate values of the cutting patterns 75 and 76 projected on the support surface 21 by an input from the controller 41 operated by the operator. As a result, the operator operates the controller 41 while viewing the cutting patterns 75 and 76 projected on the fabric 7 on the cutting table 2, and the positions and angles of the cutting patterns 75 and 76 projected from the projector 5 are determined in real time. Can be adjusted. Thus, the operator can feel that the pattern pieces represented by the cutting patterns 75 and 76 are arranged on the fabric 7 and moved. As described above, the projection data adjustment unit 46 functions as an arrangement changing unit of the present invention.

  When the positions and angles of the cutting patterns 75 and 76 are determined, information on the determined shapes and positions and angles of the determined cutting patterns 75 and 76 is obtained from the projection data adjusting unit 46 by the operation of the controller 41 by the operator. 28. The cutting data adjustment unit 28 adjusts cutting data based on information on the shape, position, and angle of the cutting patterns 75 and 76, and outputs the adjusted cutting data to the cutting unit control unit 29. The cutting unit control unit 29 drives the cutting unit 22 based on the adjusted cutting data, and as a result, the fabric 7 is cut along the shapes of the cutting patterns 75 and 76 by the cutting unit 22. Thus, a pattern piece having a shape adjusted according to the distortion of the fabric 7 is created in a state where the defective portion of the fabric 7 is avoided and the pattern matching is adjusted. The created pattern piece is cut off from the other part of the fabric 7, thereby eliminating the stress that caused the strain in the fabric 7. Thereby, the pattern piece of the shape corresponding to the cutting pattern 75 and 76 of the appropriate shape before adjustment is obtained.

  In the flowchart of FIG. 6, the fabric 7 is placed on the cutting apparatus 1 according to the embodiment, the distortion is specified, the marker data is read, the cutting pattern represented by the marker data is adjusted, and the position of the cutting pattern is adjusted. And operation | movement of the cutting device 1 in the case of cutting the fabric 7 along the cutting pattern which passed through these adjustments is shown. Hereinafter, operation | movement of the cutting device 1 is demonstrated along a flowchart.

  First, the fabric 7 is placed on the support surface 21 of the cutting table 2 by the spreader 3 (step S1), and the grid 6 is projected on the surface of the fabric 7 according to the operation of the controller 41 by the operator (step S1). Step S2). Projection of the grid 6 is executed by the grid display adjustment unit 43 of the projection control device 4, and the X grid lines X1, X2,... X12 and the Y grid lines Y1, Y2,. This is performed by being projected onto the upper fabric 7 by the projector 5. If the fabric 7 placed on the support surface 21 is distorted, the grid 6 is projected in an inconsistent state with respect to the pattern of the fabric 7 as shown in FIG.

  Subsequently, the X grid line that is the reference line of the grid 6 is adjusted along the handle of the fabric 7 by the operation of the controller 41 by the operator (step S3). Specifically, among the reference lines of the grid 6, the sixth X grid line X 6 as the width direction reference line located at the center in the longitudinal direction of the fabric 7 is along the curved linear handle 71 of the fabric 4. Deform and adjust. For adjustment of the X grid line X6, the adjustment points P1 to P9 set at the intersections with the Y grid lines Y1 to Y9 are sequentially selected from the first adjustment point P1, and the positions of the selected adjustment points P1 to P9 are determined. This is done by moving in the Y-axis direction. For adjusting the positions of the adjustment points P1 to P9, the adjustment points P1 to P9 are selected by the selection button of the controller 41, and the movement direction and the movement distance are input by operating the cross-shaped direction buttons of the controller 41. When the fabric 7 is pulled out from the roll body 31, distortion in the Y-axis direction often occurs. However, when the distortion in the X-axis direction is large, the adjustment point may be moved in the X-axis direction. FIG. 8 shows a state where the adjustment of the position from the first adjustment point P1 to the fifth adjustment point P3 is completed. As shown in FIG. 8, when the adjustment points P1 to P3 are adjusted and moved in the X-axis direction, all the intersection points with the Y grid lines Y1 to Y3 including the adjustment points P1 to P3 are changed to the adjustment points. It moves by the same distance as the movement distance of P1 to P3. By repeating the adjustment of the adjustment point of the sixth X grid line X6 up to the ninth adjustment point P9, the overall shape of the grid 6 is adjusted as shown in FIG. This is because attention is paid to the fact that the distortion generated in the fabric 7 drawn out from the roll body 31 has a small difference in magnitude in the Y direction, and at the adjustment points P1 to P9 set at different positions in the X direction. By adjusting this, the strain of the fabric 7 can be efficiently identified.

  When the adjustment of the grid 6 is completed by adjusting the adjustment points P1 to P9, XY coordinate conversion parameters are obtained based on the movement direction and the movement amount of the adjustment points P1 to P9, which are adjustment amounts of the grid 6 (step S4). This parameter is based on the coordinates defined by the X-axis and Y-axis set on the support surface 21, and the grid 6 has an orthogonal shape before adjustment, and the center in the width direction after adjustment is more in the Y-axis direction than both ends. The shape is converted into a bulging shape. The obtained parameters are set in the coordinate conversion unit 4 of the projection control device 4.

  When the conversion parameter is set in the projection control device 4, the marker data is read into the control device of the cutting table 2 (step S5), and the cutting data is generated by the cutting data creating unit 28 of the cutting table control device 26 based on the marker data. Is created. The cutting data created by the cutting data creation unit 28 is converted into projection data by the projection data creation unit 45 of the projection control device 4. Further, in the projection data creation unit 45, parameters set corresponding to the adjustment of the grid 6 are input from the coordinate conversion unit 44, and the coordinates of the projection data are converted according to the parameters (step S6). The projection data whose coordinates have been converted is output to the projector 5 and projected onto the surface of the fabric 7 by the projector 5 (step S7). As shown in FIG. 10, the cutting patterns 75 and 76 are adjusted to a shape corresponding to the distortion of the fabric 7 and projected onto the surface of the fabric 7.

  When the cutting patterns 75 and 76 whose coordinates have been converted are projected onto the surface of the fabric 7 having distortion, it is confirmed whether or not the cutting may be performed at the positions of the cutting patterns 75 and 76 on the fabric 7. (Step S8). If there is a defective portion in the fabric 7 or if the cutting positions of the cutting patterns 75 and 76 are not suitable for pattern matching, the positions and angles of the cutting patterns 75 and 76 are changed (step S9). The position and angle of the cutting patterns 75 and 76 are changed by an input to the controller 41 by the operator. That is, the operator operates the selection button of the controller 41 to select the target cutting patterns 75 and 76, and operates the cross-shaped direction button of the controller 41 to move the moving direction and moving distance, or the rotating direction and rotating angle. Enter. The rotation of the cutting patterns 75 and 76 is rotation around the normal line of the fabric 7.

  When the positions and angles of the cutting patterns 75 and 76 are changed, the process returns to step S6, and the original projection data of the cutting patterns 75 and 76 are input from the coordinate conversion unit 44 with the changed positions and angles as a reference. Coordinates are converted by parameters. The projection data whose coordinates have been converted is output to the projector 5 and projected onto the surface of the fabric 7 by the projector 5 (step S7). On the surface of the fabric 7, cutting patterns 75 and 76 adjusted to a shape corresponding to the distortion of the fabric 7 are at positions and angles avoiding defective portions of the fabric 7, or pattern matching is at appropriate positions and angles. Adjusted and projected.

  Subsequently, the process proceeds to step S8, and if it is determined that the positions and angles of the adjusted cutting patterns 75 and 76 are acceptable, the information on the adjusted cutting patterns 75 and 76 is transferred from the projection data adjusting unit 46 to the cutting data adjusting unit 29. The cutting data adjusting unit 29 is input, and the shape, position, and rotation angle of the adjusted cutting patterns 75 and 76 are reflected in the cutting data. Thereafter, cutting data corresponding to the cutting patterns 75 and 76 is output to the cutting unit control unit 30, and the cutting unit 22 is driven under the control of the cutting unit control unit 30 to follow the cutting patterns 75 and 76. Cutting is performed (step S10).

  The pattern piece obtained in this way avoids the defective part of the fabric 7, and the pattern matching is adjusted. Further, the pattern piece is separated from the other part of the fabric 7 to eliminate the stress that caused the distortion in the fabric 7, and has a shape corresponding to the cutting patterns 75 and 76 having proper shapes before adjustment. Become. Therefore, it is possible to obtain a pattern piece having no distortion in a state in which a defective portion is avoided and pattern matching is appropriately performed from the fabric 7 having distortion.

  As described above, according to the cutting apparatus 1 of the present embodiment, the grid display adjustment unit 43 adjusts the grid 6 so as to match the distortion of the fabric 7, and the coordinate conversion unit 44 corresponds to the adjusted grid 6. Since the cutting patterns 75 and 76 are deformed, the shape of the cutting patterns 75 and 76 can be easily and effectively adapted to the distortion of the fabric 7. In addition, since the grid 6 and the cutting patterns 75 and 76 are projected onto the fabric 7 on the support surface 21 by the projector 5, the operator can visually recognize the strain of the fabric 7 and directly handle the pattern 71 corresponding to the strain of the fabric 7. The grid 6 can be accurately deformed and adjusted so as to follow the above. Therefore, the distortion of the fabric 7 can be specified with higher accuracy than the conventional cutting apparatus that specifies the distortion by image processing. As a result, since the shape of the cutting patterns 75 and 76 can be accurately adjusted to a shape corresponding to the distortion of the fabric 7, the pattern pieces obtained by cutting along the adjusted cutting patterns 75 and 76 are as follows. Since the distortion of the fabric 7 is eliminated, the appropriate shapes of the cutting patterns 75 and 76 can be accurately reproduced.

  Further, according to the cutting device 1 of the present embodiment, the distortion of the fabric 7 extends in the X grid lines X1, X2,... X12 extending in the width direction of the fabric 7 and the drawing direction of the fabric 7. Since the Y grid lines Y1, Y2,..., Y9 are specified using a grid orthogonal to each other, the distortion generated when the roll body 31 is used can be specified easily and appropriately.

  Moreover, according to the cutting apparatus 1 of this embodiment, since the cutting patterns 75 and 76 deform | transformed corresponding to the grid 6 are projected on the surface of the fabric 7, visually recognizing the defective part and pattern which the actual fabric 7 has. The positions and angles of the cutting patterns 75 and 76 can be adjusted easily and appropriately.

  In the above embodiment, the grid 6 is used as the reference pattern. However, the reference pattern is not limited to the grid 6, and a polygon mesh, dots or crosses arranged in a plane direction and the like may be used as the reference pattern.

  Moreover, in the said embodiment, although the grid 6 was deform | transformed so that the pattern 71 of the fabric 7 might be met, you may deform | transform the grid 6 so that the texture of the fabric 7 may be met.

DESCRIPTION OF SYMBOLS 1 Cutting apparatus 2 Cutting table 3 Spreading apparatus 4 Projection control apparatus 5 Projector 6 Grid 7 Cloth 41 Controller 75,76 Cutting pattern

Claims (4)

A support surface for supporting the sheet material;
The surface of the sheet material on the support surface, a cutting pattern shape and arrangement is changed, a pattern projection means for projecting a reference pattern deformed in accordance with the pattern or texture of the sheet material,
An input unit that receives input from the operator;
Based on an input by the operator to the input unit, a reference pattern deforming unit that deforms the reference pattern projected on the surface of the sheet material so as to follow the pattern or texture of the sheet material on the support surface;
Cutting pattern deformation means for deforming the shape of the cutting pattern so as to correspond to the reference pattern deformed by the reference pattern deformation means;
An arrangement changing unit that changes the arrangement state in the sheet material of the cutting pattern that is deformed by the cutting pattern deforming unit and is projected onto the surface of the sheet material by the pattern projecting unit;
A cutting apparatus comprising: cutting means for cutting the sheet material so as to follow the cutting pattern deformed by the cutting pattern deforming means and changed in the arrangement state by the arrangement changing means . The cutting apparatus according to claim 1,
The reference pattern has a width direction reference line extending in the width direction of the sheet material, and the reference pattern deforming means is arranged on the sheet material to be positioned on a straight line in the width direction if there is no distortion. A cutting apparatus characterized in that it is bent so as to pass through a plurality of points. The cutting device according to claim 2,
The reference pattern has a length direction reference line extending in the length direction of the sheet material, and the reference pattern deforming means should be positioned on a straight line in the length direction if there is no distortion. A cutting apparatus characterized in that it is bent so as to pass through a plurality of points on a sheet material. In the cutting device according to claim 3,
The cutting apparatus according to claim 1, wherein the reference pattern is formed in a grid shape having a plurality of width direction reference lines and a plurality of length direction reference lines.

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