JP6479498B2 - Method of spreading using a spreading apparatus - Google Patents

Description

  The present invention relates to a spreading method using a spreading apparatus that automatically removes a portion including a wound of a raw fabric to be fed (such as a scratch or a color unevenness generated in manufacturing).

  The extending apparatus moves the extending portion while extending the original fabric, and the cutter unit that moves following the extending portion moves the fabric of the extending length along the extending portion. It is an apparatus that separates from the opposite side, or repeats the extension process in which the extension part folds the original fabric by the extension length, and stacks the fabric on the extension table or folds the original fabric (see, for example, Patent Document 1). . The spreader is a one-way stretch configuration in which the fabric is fed in one direction and cut while aligning the direction of the fabric, and the front and back surfaces of the fabric to be stacked face each other. Is a reciprocating extension configuration in which the front surfaces (or the back surfaces) of the fabric or folded original fabric that face each other are cut or folded as they are, or folded.

Japanese Patent Laid-Open No. 06-316358

  It is inevitable that the raw material is scratched during production. For this reason, the raw fabric having a scratch or the like is marked on the side edge of the feed direction position with the scratch or the like. In the extending work, when the mark is confirmed in the original fabric to be pulled out, the portion including the scratch or the like is cut before and after the feeding direction, and the portion including the scratch or the like is removed from the original fabric. Then, the stretch work was resumed by splicing the separated original fabrics in the feeding direction. The work for removing such scratches is basically performed by the worker. For this reason, not only the work efficiency of the spreading apparatus which is being automated is reduced, but also the work cost for the spreading work is increased (in particular, the labor cost is increased). Therefore, in order to automate the work of removing scratches and the like in the work of stretching, studies were made.

  What has been developed as a result of the study is that the extension part moves by the extension length while feeding the original fabric to the extension table, and the cutter part cuts to cut the extension length of the fabric from the original fabric. A stretching device that repeats the stretching process of laminating the original fabric by the reciprocating length of the extending process while laminating the original fabric to the extending table while the extending section is fed back to the extending table, In the extending method using, the control unit for controlling the extending part and the cutter part, the cutting pattern arranged in the range of the extending length with respect to the raw material fed out from the extending part, and each cutting pattern Virtually set a cutting line after the feeding direction from the end and a joint line before the cutting line in the feeding direction, and if there is a scratch or the like on the original fabric, before the feeding direction of the scratch etc. A cutting line is cut by the cutter part, and the separation line determined after the feeding direction of the scratches, etc. Feed out the original fabric, cut the separation line with the cutter part, remove the part containing scratches, etc., move the extension part without feeding out the original fabric, and connect the line close to the rear edge of the separated first half of the original fabric The leading edge of the latter half of the original fabric is overlapped, the cutting pattern, cutting line and joint line are virtually reset from the leading edge of the first half of the original fabric, and the stretched length from the leading edge of the first half of the original fabric The extending method is characterized in that the extending portion is moved to a position corresponding to the above and the latter half of the original fabric is fed out. The cutter portion may be moved in the feeding direction independently of the extending portion, but it is preferable that the cutter portion is provided in the extending portion and moves integrally with the extending portion.

  The extending portion can be moved back and forth on the extending table in the extending direction of the original, and the original is unfolded on the extending table by moving the original while moving. Various conventionally known methods can be used as a method of feeding the original fabric from the stretched portion. The original fabric may be supported by the extending portion and moved integrally with the extending portion, or may be supported by the apparatus frame of the extending device and pulled out by the moving extending portion. For example, a spreader device using a conveyor belt moves from a roll supported by the spreader device by moving the stretcher portion that supports the upper end roller of the conveyor belt that expands and contracts on the spreader table. By pulling out the original fabric and degenerating, the drawn-out original fabric is drawn out and lowered onto the extension table. The cutter unit has a cutter that can be moved back and forth in the width direction of the original fabric, and cuts the original fabric fed to the spreader table and separates it into the front and rear.

  The extending method of the present invention is a cutting pattern arranged in the range of the extending length, with respect to the original fabric fed out from the extending portion, except for a separation line that is appropriately determined depending on the position in the feeding direction of the scratch and the like, Cutting for removing a part including a flaw etc. by virtually setting a cutting line that is behind the feeding direction from the end of each cutting pattern and a joint line that is before the cutting line in the feeding direction. Automates the joining of raw materials after cutting and cutting. The cutting pattern is a cutting unit in which the garment body and each piece of cloth are arranged. The part including the separated scratches is collected by the operator as appropriate. The separation line is determined appropriately by the operator, or the control device determines a predetermined length rearward from a scratch or the like. In the joining of the original fabric after cutting, the cut line and the joint line are separated, and the separated first half and second half of the original fabric are partially overlapped. The first half and the second half of the original fabric thus joined together are removed in the same manner with respect to scratches and the like found next by virtually resetting the cutting pattern, cutting line and joint line from the leading edge of the first half of the original fabric. Can do.

  When automating the determination of the separation line, the mark attached to the original fabric is used. The extending portion is provided with a sensor for detecting a mark attached to a feeding direction position having a scratch or the like, and the control unit is configured to cut a cutting line in front of the feeding direction of the scratch or the like after the mark is detected by the sensor. And the raw material is fed out to the separation line determined based on the detected mark, and the separation line is cut by the cutter unit. When the cutter part is provided on the extending part, the cutting line has already passed through the cutter part when the sensor detects the mark. Cut the cutting line. Since the sensor can detect the mark and recognize the position in the feeding direction of a scratch or the like, the control unit automatically sets a separation line by adding a predetermined length to the recognized feeding direction position. The sensor may be a contact type sensor, but is preferably a non-contact type sensor that does not interfere with the spreading work.

  In this way, the part that includes the scratches and the like removed from the moving direction and the moving amount of the stretched part by automating the cutting for removing the part including the scratches and the joining of the original fabric after cutting. It is possible to record, as a history for each original fabric, the length of the sheet and the laminated position where the first half and the second half of the original fabric are joined together. Since the total length of the original fabric is known in advance, it is preferable to record the history together with the total length for each original fabric. The “lamination position where the original fabrics are joined” means a layer in which the separated first half and the second half of the original fabric are partially overlapped or a folded original fabric is present.

  The spreader of the present invention is a work for removing scratches and the like by automating cutting for removing a part including scratches and joining of the original fabric after cutting among the work for removing scratches and the like in the work of spreading. It is possible to reduce the labor and time required for. Further, when the cutter portion is provided in the extension portion, the automation can be achieved only by moving the extension portion without separately moving the cutter portion, and therefore the time required for removing the scratches can be shortened. And since the joined original fabrics are partially duplicated, even if they are sent to the cutting process in the same way as the ordinary stretched fabric or folded original fabric, the cutting pattern can be cut without shortage, The labor and time in the cutting process can also be reduced.

  If a sensor for detecting a mark attached to a feed direction position with a scratch or the like is provided in the extending portion, it is possible to automate the determination of the separation line, and therefore the labor and time required to remove the scratch or the like can be further reduced. In addition, if the length of the part including the scratches removed by the control unit and the lamination position where the divided first half of the original fabric and the latter half of the original fabric are recorded as a history for each original fabric, the extension is finished and laminated. Information useful for post-processes (such as a cutting process according to a cutting pattern) can be easily obtained or obtained for the fabric or the folded original fabric. When the separation line is determined by detecting the mark with the sensor, the leading edge (= separation line) of the separated original fabric becomes accurate, so that the accuracy of the history can be increased.

It is a side view showing an example of the extending apparatus to which the extending method of this invention is applied. It is a side view showing the structure of the principal part of the spreading apparatus of this example. It is a top view showing the structure of the principal part of the spreading apparatus of this example. It is a top view showing the cutting pattern, cutting line, and joint line which are virtually allocated to the original fabric. It is a side view showing the state which pulled out the original fabric in the extending process by the extending apparatus of this example. It is a top view showing the state which pulled out the original fabric in the extending process by the extending apparatus of this example. It is a side view showing the state which has extended the original fabric from the extending part at the extending process by the extending apparatus of this example. It is a top view showing the state which has unwound the original fabric from the extending part in the extending process by the extending apparatus of this example. It is a side view showing the state which cut | disconnected the original fabric and laminated | stacked the cloth | dough on the spread table in the extending process by the extending apparatus of this example. It is a top view showing the state which cut | disconnected the original fabric and laminated | stacked the cloth | dough on the spread table in the extending process by the extending apparatus of this example. It is a top view showing the case where there existed a crack etc. when the original fabric was pulled out in the extending process by the extending apparatus of this example. It is a side view showing the state which the non-contact type sensor detected the mark in the middle of extending | stretching the original fabric from the extending part by the extending process by the extending apparatus of this example. It is a top view showing the state which the non-contact type sensor detected the mark in the middle of extending | stretching the original fabric from the extending part by the extending process by the extending apparatus of this example. It is a side view showing the state which cut the original fabric with the cutting line in front of a crack etc. in the extending process by the extending apparatus of this example. It is a top view showing the state which cut | disconnected the original fabric with the cutting line in front of a crack etc. in the extending process by the extending apparatus of this example. It is a side view showing the state which cut | disconnected the original fabric with the separation line determined by the control part in the extending process by the extending apparatus of this example. It is a top view showing the state which cut | disconnected the original fabric with the separation line determined by the control part in the extending process by the extending apparatus of this example. It is a side view showing the state which isolate | separated the original fabric into the first half of the original fabric and the latter half of the original fabric, and removed the part containing a flaw etc. in the extending process by the extending apparatus of this example. It is a top view showing the state which isolate | separated the original fabric into the first half of the original fabric, and the latter half of the original fabric, and removed the part containing a flaw etc. in the extending process by the extending apparatus of this example. It is a side view showing the state in which the front edge of the latter half of the original fabric is overlapped with the rear edge of the former half of the original fabric in the extending process by the spreading apparatus of this example. It is a top view showing the state which piles up the front edge of the latter half of original fabric on the trailing edge of the first half of original fabric in the extending process by the extending apparatus of this example. It is a side view showing the state which extended | stretched the latter half of the original fabric from the extension part, and cut | disconnected from the original fabric in the extending process by the extending apparatus of this example. It is a top view showing the state which extended | stretched the latter half of the original fabric from the extension part, and cut | disconnected from the original fabric in the extending process by the extending apparatus of this example.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. As shown in FIG. 1, for example, as shown in FIG. 1, the spreading device to which the extending method of the present invention is applied is an annular orbit that is hung around an upper end roller 211 and a lower end roller 213 that are alternately advanced and retracted to sandwich the extension table 1. The conveyor belt 21 is configured to transfer the raw fabric 8 on the outer peripheral surface of the uppermost layer reaching the upper end roller 211. The spreader of this example includes a cutter unit 3 having a cutter for cutting an original fabric 8 fed out from the spreader unit 2 into a fabric 81 having a stretch length L (see FIG. 4 described later). It is provided in the front (left side in FIG. 1).

  The spread table 1 is a flat surface formed on the upper surface of the steel device frame 11. The apparatus frame 11 is provided with an upright frame 14 and an original fabric stocker 12 at the rear end (right end in FIG. 1). The original fabric 8 is wound in a roll shape and is supported by the original fabric stocker 12 so as to be rotatable. The apparatus frame 11 incorporates a drive belt 13 wound around one drive roller and three driven rollers below the extension table 1.

  The upper end roller 211 is rotatably mounted on the extending portion 2 provided with a pair of left and right upper sliders 212 that can move back and forth along the left and right edges (the front side and the back side in the drawing in FIG. 1) of the extending table 1. Let The extending portion 2 is connected to the drive belt 13 through an upper slider 212 connected to the upper side of the drive belt 13. Thereby, the extension part 2 advances and retreats on the extension table 2 according to the rotation of the drive belt 21. Further, in the extending portion 2 of this example, the pair of left and right upper sliders 212 is provided with an intermediate roller 215 that supports the conveyor belt 211.

  The lower end roller 213 is rotatably mounted on a pair of left and right lower sliders 224 that can advance and retreat along the left and right side edges (the front side and the back side in FIG. 1) of the lowermost stage of the apparatus frame 11. The lower slider 224 is connected to the lower side of the drive belt 13. As a result, the lower end roller 21 is connected to the drive belt 13 via the lower slider 224, and advances and retreats alternately with the upper end roller 211 under the extension table 2 along the circumference of the drive belt 21.

  The conveyor belt 21 constitutes an annular circular track that sandwiches the spread table 1 up and down as a circular end where the upper end roller 211 and the lower end roller 213 are folded back. The spreader of this example is provided with two intermediate rollers 215 and 215 at a height corresponding to the upper end roller 211 and the lower end roller 213 on the upright frame 14 (right end in FIG. 1). The conveyor belt 21 has a horizontal portion between the upper end roller 211 and the upper intermediate roller 215 provided on the upright frame 14, a horizontal portion between the lower end roller 213 and the lower intermediate roller 215 provided on the upright frame 14, and A vertical portion between the upper and lower intermediate rollers 215 provided on the upright frame 14 is divided.

  As shown in FIGS. 2 and 3, the spreader device of this example includes an upper chuck 4 that integrally presses the conveyor belt 21 and the original fabric 8 together with the intermediate roller 215 near the upper end roller 211, and the conveyor An intermediate outer chuck 5 that presses only the outside of the vertical portion of the belt 1 in pairs with the chuck block 216 and an intermediate inner chuck 6 that presses only the inside of the vertical portion in pairs with the chuck block 216 are provided. Yes. The upper chuck 4, the intermediate outer chuck 5, and the intermediate inner chuck 6 in this example are composed of a pressing plate extending in the width direction of the conveyor belt 21 and an air cylinder for raising and lowering the pressing plate, one for each part. It is provided one by one.

  Further, the extending device of this example is provided with a non-contact sensor 71 in the extending portion 2 for detecting a mark 85 (see FIG. 11 and the like) that indicates the position in the feed-out direction of the scratch X or the like. As the non-contact sensor 71, for example, an optical sensor is used. When the non-contact sensor 71 detects the mark 85, a detection signal is sent to the control unit 7, and the control unit 7 controls the drive unit 72. The driving unit 72 drives the driving means of the driving belt 13 that advances and retracts the extending portion 2, the driving means of the cutter unit 3 that reciprocates along the extending portion 2, the upper stage chuck 4, the intermediate outer chuck 5, and the intermediate inner chuck 6. This is a generic term for the control target of the control unit 7 such as means. For convenience of illustration, in each drawing, the extending portion 2 is represented as a representative and is connected to the drive unit 72 by a signal line.

  The control unit 7 is a device that controls the driving unit 72 automatically according to a program or by an operator's operation. For example, a personal computer is used. In this example, as shown in FIG. 4, three cutting patterns 9 arranged in the feeding direction (left and right direction in FIG. 4) in the range of the extension length L, and after the feeding direction from the last end of each cutting pattern 9. A certain cutting line 91 and a joint line 92 that is in front of the cutting line 91 in the feeding direction and in front of the last end of each cutting pattern 9 are virtually set and registered in the control unit 7.

  The extending apparatus of this example uses the separation line 93 automatically calculated by the control unit 7 in addition to the cutting pattern 9, the cutting line 91, and the joint line 92 that are virtually set in this way. On the other hand, the non-contact sensor 71 detects a mark 85 indicating the presence of a flaw or the like X while laminating the fabric 81 cut by the cutter unit 3 from the original fabric 8 drawn out by the stretch length L on the stretch table 11. In this case, the separation of the portion 86 including the scratches and the first half 82 and the second half 83 of the original fabric are succeeded.

  First, basic one-way extension (FIGS. 3 to 5) will be described. For convenience of explanation, the operations of the upper stage chuck 4, the intermediate outer chuck 5 and the intermediate inner chuck 6 are indicated by black short arrows and non-active (indicated by white short arrows). The movement of the roller 213 is indicated by a black long arrow, and the expansion and contraction of the conveyor belt 21 due to the movement of the upper end roller 211 and the lower end roller 213 is indicated by a black long arrow, respectively, and a cutting pattern 9 and a cutting line 91 are illustrated. The connecting line 92 is hypothetical and is shown for convenience of explanation, but is not actually drawn on the original fabric 8.

  First, from the basic state (see FIGS. 2 and 3), as shown in FIGS. 5 and 6, the control unit 7 operates the upper chuck 4 and deactivates the intermediate outer chuck 5 and the intermediate inner chuck 6 to drive. The belt 13 is rotated to move the upper end roller 211 forward (moving leftward in FIG. 5) and the lower end roller 213 backward (moving rightward in FIG. 5). As a result, the conveyor belt 21 above the spreader table 1 extends, and the original fabric 8 held by the upper chuck 4 is pulled out. The lower end roller 213 moves rearward by the same movement amount as the upper end roller 211, and the conveyor belt 21 is contracted.

  7 and 8, with the raw fabric 8 pulled out, the control unit 7 deactivates the upper chuck 4 and the intermediate inner chuck 6 and activates the intermediate outer chuck 5, and the drive belt 13 is moved. The upper end roller 211 is retreated, and the lower end roller 213 is advanced. Accordingly, the conveyor belt 21 above the spreader table 1 is retracted while being wound inward, and the original fabric 8 is fed out to the spreader table 1 from the tip of the retreating upper end roller 211. At this time, the extending portion 2 is moved backward relative to the unwinding raw fabric 8.

  When the original fabric 8 is drawn out by the stretch length L, the stretch portion 2 is retracted until the cutter trajectory of the cutter portion 3 coincides with the trailing edge of the stretch length L. Thus, as shown in FIG. 9 and FIG. 10, the original fabric 8 fed to the spread table 8 is operated after the upper chuck 4 is operated so that the portion remaining on the conveyor belt 21 does not shift, and then the spread portion 2 is cut in the width direction by the cutter unit 3 moving along the line 2, and the cloth 81 having the extension length L is cut off. The original fabric 8 from which the dough 81 has been separated is in an initial state (see FIGS. 2 and 3) placed on the conveyor belt 21 above the spreader 1. Thereafter, when the steps up to here (FIGS. 5 to 10) are repeated, the fabric 81 is laminated.

  Next, a description will be given of a procedure for removing the portion 86 including the scratches and the like when the original fabric 8 has a scratch or the like X, and joining the original fabric first half 83 and the original fabric latter half 84 which are divided forward and backward. From this state (see FIGS. 2 and 3), as shown in FIG. 11, the control unit 7 operates the upper chuck 4, deactivates the intermediate outer chuck 5 and the intermediate inner chuck 6, and rotates the drive belt 13. Until the upper end roller 211 is moved forward (moving leftward in FIG. 11) and the lower end roller 213 is moved backward (moving rightward in FIG. 11) to pull out the original fabric 8, There is no change. The illustrated scratch etc. X is in the left front half part of the second cutting pattern arranged.

  Here, as shown in FIGS. 12 and 13, the control unit 7 deactivates the upper chuck 4 and the intermediate inner chuck 6, activates the intermediate outer chuck 5, rotates the drive belt 13, and retracts the upper end roller 211. When the lower end roller 213 is moved forward, the conveyor belt 21 above the extension table 1 is retracted while being wound inward, and the original fabric 8 is fed out from the tip of the upper end roller 211 moving backward to the extension table 1. Therefore, the extending portion 2 moves backward relative to the original fabric 8, and the non-contact sensor 71 eventually detects the mark 85. With the detection of the mark 85 by the non-contact sensor 71, the removal of the portion 86 including scratches and the joining of the original fabric first half 83 and the original fabric second half 84 are started.

  First, in order to cut the raw fabric 8 along a cutting line 91 in front of the feeding direction of the scratches X, the control unit 7 moves the upper end roller 211 backward and moves the lower end roller 213 forward to slightly feed the original fabric 8. As shown in FIGS. 14 and 15, after the cutter trajectory of the cutter unit 3 is aligned with the cutting line 91, the original fabric 8 is cut by the cutter unit 3. As a result, the original fabric first half 82 including only the first cutting pattern 9 is placed on the spread table 11. In order to cut the raw fabric 8 along the cutting line 91 in front of the feeding direction of the scratches X, the control unit 7 advances the upper end roller 211 and moves the lower end roller 213 backward depending on the position of the scratches X, etc. There are also cases where it is slightly rewound.

  Next, in order to cut the raw fabric 8 along the separation line 93 determined after the feeding direction of the scratches X, the control unit 7 retracts the upper end roller 211 and advances the lower end roller 213 to slightly advance the original fabric 8, As seen in FIGS. 16 and 17, the separation line 93 is cut by the cutter unit 3. The separation line 93 is automatically determined by the control unit 7 at a position obtained by adding a preset margin to the position in the feed-out direction of the scratches X and the like. As a result, the portion 86 containing scratches or the like is separated from the original fabric 8, and the original fabric latter half 83 is left on the conveyor belt 21.

  In this example, as shown in FIGS. 18 and 19, an operator (not shown) removes a portion 86 including a scratch and the like separated from the raw fabric 8. For this reason, after the control part 7 cut | disconnects the original fabric 8 with the separation line 93, the extension apparatus stops operation of the extension part 2 and others, and makes an operator restart. The removal work by the operator has an advantage that the portion 86 including the scratches and the like is surely removed, and the laminated fabric 81 is not disturbed. As long as the portion 86 including a flaw or the like is surely removed and the laminated fabric 81 is not disturbed, a mechanism for grasping and removing the portion 86 including a flaw or the like may be provided in the spreading apparatus.

  When the operator restarts the spreading apparatus, as shown in FIGS. 20 and 21, the control unit 7 operates the upper stage chuck 4 and deactivates the intermediate inner chuck 6 and the intermediate outer chuck 5, thereby driving belt 13 , And the upper end roller 211 is advanced to pull out the divided original fabric latter half 83 so that the leading edge of the original fabric latter half 83 coincides with the joint line 92 close to the rear edge of the original fabric first half 82. The control unit 7 grasps the feed-out direction position of the joint line 92 close to the rear edge of the original fabric first half 82 and the front edge (= separation line 93) of the original fabric latter half 83. For this reason, the movement of the extending part 2 which makes both correspond is controllable correctly.

  When the leading edge of the original fabric latter half 83 thus divided is aligned with the joint line 92 close to the rear edge of the original fabric first half 82, the control unit 7 starts the cutting pattern 9, the cutting line 91 and the joint from the leading edge of the original fabric first half 82. After the line 92 is virtually reset, the upper chuck 4 and the intermediate inner chuck 6 are deactivated, the intermediate outer chuck 5 is activated, the drive belt 13 is rotated, the upper end roller 211 is retracted, and the lower end roller 213 is advanced. As a result, the conveyor belt 21 above the spreader table 1 is retracted while being wound inward, and the latter half 83 of the original fabric is fed out to the spreader table 1 from the tip of the upper end roller 211 that moves backward.

  Then, after the extension portion 2 is moved from the front edge of the original fabric first half 82 to a position corresponding to the extension length L, as shown in FIG. 22 and FIG. Disconnect. As a result, the original fabric first half 82 and the original fabric latter half 83 are stacked with an extension length L equal to the fabric 81 as a whole while overlapping at the overlapping portion 84. The fabric 81 from which the portion 86 including scratches is removed from the fabric 81 laminated on the spreader table 11 is composed of the original fabric first half 82 and the original fabric latter half 83 that overlap at the overlapping portion 84. The second half 83 is sandwiched between the upper and lower fabrics 81.

  As described above, the control unit 7 grasps the feed-out direction positions of the cutting line 91 and the joint line 92 that are virtually set for the raw fabric 8. Further, the control unit 7 grasps the feed direction position of the scratch etc. X by detecting the mark 85, and also grasps the feed direction position of the separation line 93 determined from the feed direction position of the scratch etc. X. Since the control unit 7 manages the moving distance of the extending portion 2 that moves the cutter unit 3 integrally, the length Lc of the portion including a scratch or the like can be easily grasped. Of course, the control unit 7 also knows the stacking position where the first half 82 and the second half 83 are joined together. From this, the control unit 7 can record the length Lc of the portion including the scratches and the stacking position where the first half 82 and the second half 83 of the original are joined to the original 8 as a history for each original 8. .

  The folding apparatus of the present example is a folding extension that folds the folded or cut raw material cut for each layer by changing the combination of operation and non-operation of the upper chuck 4, the intermediate outer chuck 5 and the intermediate inner chuck 6. You can do it. In the case of folding back, the feed direction of the original fabric 8 in each layer is changed. Therefore, although the movement of each part after detecting the mark 85 indicating the feed direction position of the scratch X is slightly different, the scratches etc. And the first half 82 and the second half 83 of the original fabric can be joined together. Further, the control unit 7 can record the length Lc of the portion including the scratches and the stacking position where the first half 82 and the second half 83 of the original are joined to the original 8 as a history for each original 8. .

1 Stretching table
11 Equipment frame
12 Raw material stocker
13 Drive belt
14 Upright frame 2 Extension part
21 Conveyor belt 3 Cutter unit 4 Upper chuck 5 Intermediate outer chuck 6 Intermediate inner chuck 7 Control unit
71 Non-contact sensor
72 Drive unit 8
81 cut fabric
82 First half of the web
83 Second half of the web
84 Heavy stomach
85 mark
86 Parts including scratches, etc. 9 Cutting pattern
91 Cutting line
92 Connection
93 Separation line L Total length Lc Length of the part containing the scratch X etc.

Claims (4)

The extending step in which the extending portion moves by the extending length while feeding the original fabric to the extending table, and the cutter portion cuts and separates the extending length of the fabric from the original fabric and stacks it on the extending table. In the extending method using the extending device that repeats the extending process in which the extending portion reciprocates the extending length while feeding the original fabric to the extending table, and the original fabric is folded back by the extending length,
The control unit for controlling the extending portion and the cutter portion is located after the cutting pattern arranged in the range of the extending length with respect to the raw material fed from the extending portion, and after the feeding direction from the end of each cutting pattern. Virtually set the cutting line and the joint line in front of the feeding direction from the cutting line,
If there is a scratch on the original fabric,
The control unit cuts the cutting line in front of the feeding direction of the scratch or the like by the cutter unit, feeds the original fabric to the separation line determined after the feeding direction of the scratch or the like, and cuts the separation line by the cutter unit, After removing the part containing scratches, etc., the extension portion is moved without feeding the original fabric, and the leading edge of the separated latter half of the original fabric is overlapped with the joint line near the rear edge of the separated original fabric, The cutting pattern, cutting line, and joint line are virtually reset from the front edge of the anti-first half, and the extension portion is moved from the front edge of the original fabric half to the length corresponding to the extension length to move the original fabric. A method of extending the second half. The extending method according to claim 1, wherein the cutter unit is provided in the extending part and moves integrally with the extending part. The extending portion is provided with a sensor for detecting a mark attached to a feeding direction position with a scratch or the like,
After the detection of the mark by the sensor, the control unit cuts the cutting line in front of the feed-out direction of the scratch or the like by the cutter unit, and feeds the original fabric to the separation line determined based on the detected mark. The method of extending a roll according to claim 1 or 2, wherein cutting is performed by a cutter portion. The control unit records the length of the part including the removed scratches and the stacking position where the divided first half of the original fabric and the latter half of the original fabric are joined together as the history of each original fabric from the moving direction and moving amount of the extending portion. The extending method according to any one of claims 1 to 3.

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