JP5995741B2 - Sheet material threading device - Google Patents

Description

  The present invention relates to a thread marking device for a sheet material, in which a thread for marking is left through the sheet material.

  Conventionally, when a sheet material such as a cloth is cut as a part for sewing clothing in the cutting process, marking is performed for alignment when the part is sewn in the subsequent process of the cutting process. A marking device has been proposed (see, for example, Patent Document 1). In this marking apparatus, a sheet to which a dye is attached in advance is prepared, and the sheet material can be colored with the dye by piercing the needle and penetrating the thread. A sewing mark that is used to mark the thread itself as a mark, or to mark it manually using a chaco, etc. Attached devices have also been proposed (see, for example, Patent Document 2).

Japanese Patent Publication No. 56-020388 Japanese Utility Model Publication No. 61-184484

  If a marking device as shown in Patent Document 1 is used, marking colored with a dye is possible, but a sufficient effect may not always be obtained. On page 5, left column (9th column), lines 3 to 4 of Patent Document 1, “the darkness of the mark can be increased by reciprocating the needle several times at the same point”. This is presumed to support that there is a possibility that coloring with a dye-colored yarn may be insufficient depending on conditions.

  In the cutting step, as shown in Patent Document 2, if a yarn to be a mark is left, marking can be performed with a chaco in the subsequent step with reference to the yarn for the mark. In the sewing mark applicator of Patent Document 2, a thread having a length cut by a thread cutting knife remains on the surface of the fabric. Since the thread cutting knife is provided at a certain height above the needle plate that supports when the cloth is placed and penetrates the hollow needle, the length of the thread remaining on the surface of the cloth is also constant.

  In some cases, it is preferable that the length of the yarn left on the surface of the sheet material such as fabric is somewhat long. For example, when a plurality of sheets of sheet material are laminated to leave mark yarns penetrating and separated one by one from the laminated state, the remaining yarns may be cut and added to a certain length. In this case, it is necessary to leave at least the yarn length as the total length to be cut and added to each sheet material. Also in Patent Document 2, if the yarn is cut near the tip position of the hollow needle that is pulled out and raised after passing through the fabric, it is possible to leave the yarn length longer than cutting at the position where the yarn cutting knife is provided. However, the length of the yarn remaining on the surface of the fabric is limited to a height that raises the hollow needle that supplies the yarn.

  An object of the present invention is to provide a thread punching device for a sheet material that can be adjusted by adding a yarn length to be left by penetrating the yarn on the surface of the sheet material from the side of the needle that supplies the yarn.

The present invention is a sheet material threading device for leaving a mark thread through the sheet material at a perforated position,
Moving means capable of relative movement in a direction parallel to the surface of the sheet material;
A thread supply mechanism for supplying the thread;
Yarn that can be moved up and down with respect to the sheet material, and can be left in a state of passing through the sheet material as a mark yarn, by piercing the sheet material from above and pulling it out. A penetrating needle,
Thread feeding means for passing the thread through the sheet material, being arranged facing the path of the thread extending downward from the thread penetrating needle in a state of being pulled out and raised, and feeding the thread from the thread penetrating needle;
A cutting mechanism for cutting a thread extending downward from the thread penetrating needle in the raised state,
It is the thread | yarn threading device of the sheet | seat material characterized by including.

In the present invention, the thread feeding means presses and holds the thread, and lowers the thread while holding the thread, and then releases the thread presser.
It is characterized by including.

In the present invention, the moving means includes
After the yarn feeding means feeds the yarn from the yarn penetrating needle, the yarn penetrating needle, the yarn feeding means, and the cutting mechanism are moved in a direction parallel to the surface of the sheet material,
Tensioning the thread extending between the thread penetration needle and the perforated position,
It is characterized by that.

Further, the present invention further includes a slip-off preventing mechanism that is disposed between the thread penetrating needle in the raised state and the thread feeding means, and that forms a slip-off preventing portion in the thread extending downward from the thread penetrating needle.
It is characterized by that.

  According to the present invention, after the yarn has been pierced to the perforated position by the thread penetrating needle, the yarn feeding means pulls the yarn from the thread penetrating needle in a state where the thread penetrating needle is pulled upward from the surface of the sheet material and raised. Pay out. The yarn length as the mark yarn that is allowed to penetrate through the surface of the sheet material can be added from the yarn penetration needle. If the length of the yarn fed by the yarn feeding means is adjusted, the yarn length remaining on the surface of the sheet material as the mark yarn can be adjusted.

  Further, according to the present invention, the thread feeding means includes a thread retainer that holds and holds the thread, descends while retaining the thread, lowers the thread, and releases the thread. While pulling down, it can be reliably fed out.

  According to the present invention, even if the yarn feeding means feeds the yarn from the thread penetrating needle and lengthens the yarn length remaining on the surface of the sheet material, the yarn is tensioned by the movement of the moving means, and the perforated position It is possible to prevent the yarn from being superimposed in the vicinity of. Even when cutting the sheet material into parts for sewing after leaving the thread on the surface of the sheet material, move the thread inside the part by moving means so that the thread left near the perforation position is not cut. Can do.

  Further, according to the present invention, the thread remaining on the surface of the sheet material is formed with the slip prevention mechanism so that the thread remaining on the surface of the sheet material does not come off during suction holding, conveyance, handling, etc. Can be.

FIG. 1 is a side cross-sectional view showing a schematic configuration of a sheet material threading device 10 as an embodiment of the present invention. FIG. 2 is a cross-sectional plan view and a side cross-sectional view showing an operation of moving the sheet material threading device 10 of FIG. 1 in parallel along the surface of the sheet material 7. FIG. 3 is a cross-sectional plan view and a side cross-sectional view showing the operation of piercing the thread penetrating needle 13 of the yarn punching device 10 of FIG. 1 into the punching position 7 a of the sheet member 7. FIG. 4 is a simplified side cross-sectional view showing the operation of leaving the yarn 9 on the surface of the sheet material 7 as the mark yarn 9a in the sheet material threading device 10 of FIG. FIG. 5 is a cross-sectional plan view and a side cross-sectional view showing the operation of forming the drop prevention portion 14a shown in FIG. 4 (e) corresponding to FIG. 4 (d) in the sheet material threading device 10 of FIG. FIG. FIG. 6 shows a state in which the yarn 9 is cut as shown in FIG. 4 (e) and remains as the mark yarn 9a on the surface of the sheet material 7 after cutting the yarn 9, as shown in FIG. It is a plane sectional view and a side sectional view. FIG. 7 is a plan view and a side view showing a state in which the thread 9 is released by the thread retainer 16 of the sheet stitching device 10 of FIG. FIG. 8 is a plan view and a side view showing a state in which the thread 9 is held by the thread retainer 16 of the sheet stitching device 10 of FIG. FIG. 9 is a simplified side cross-sectional view showing the operation of leaving the yarn 9 as a mark yarn 9a on the surface of the sheet material 7 while moving in the sheet material threading device 10 of FIG.

  1 to 9 show the configuration and operation of a sheet material threading device 10 as an embodiment of the present invention. For simplicity of explanation, the corresponding configurations are shown in FIG. 2, FIG. 3, FIG. 5, and FIG. 6. May be shown only on one side and omitted on the other. In addition, portions that are not described in the drawings to be described may be referred to with reference numerals described in other drawings.

  FIG. 1 shows a schematic configuration of a sheet material threading device 10 according to an embodiment of the present invention. The cutting machine 1 includes a cutting table 2 and a cutting head 3. The cutting head 3 is movable on the cutting table 2 in the Y direction, which is the depth direction of the paper surface, along a Y beam 4 that is installed in a direction perpendicular to the paper surface. The Y beam 4 is supported by a traveling mechanism (not shown) on both sides of the front side and the back side of the paper surface, and can move and move in the X direction, which is the left-right direction of the paper surface. The cutting head 3 includes a cutting blade 5 and a material presser 6. The sheet material 7 is sucked and held from below on the cutting table 2 in a single sheet state or in a stacked state of a plurality of sheets. The cutting head 3 moves in the XY direction along the surface of the cutting table 2. The cutting machine 1 uses the cutting blade 5 provided on the cutting head 3 to suck and hold the sheet material 7 from below the cutting table 2 when cutting the sheet material 7 whose surface is pressed by the fabric presser 6. The surface of the sheet material 7 is covered with a sealing sheet 8 made of a non-breathable synthetic resin film, and the cutting blade 5 is inserted into the sheet material 7 from above the sealing sheet 8 and cut. The surface 2a of the cutting table 2 is formed of bristles at the tip of the bristle block 2b, with the synthetic resin bristle blocks 2b arranged so that it is difficult to cut even if the cutting blade 5 enters. The cutting table 2 in which the bristle blocks 2b are arranged has a conveying function as a conveyor belt.

  A mark thread 9 a that is used for marking such as marking in a subsequent process of the cutting process is supplied as a thread 9 from the thread supply mechanism 11. The yarn supply mechanism 11 can set the yarn package 11a and supply the yarn 9 through the yarn guide 11b. The yarn holding mechanism 12 moves up and down together with the yarn penetrating needle 13 and can hold the yarn 9 supplied from the yarn supplying mechanism 11 to the yarn penetrating needle 13 in the middle of the supply path. The thread penetrating needle 13 is hollow, and the thread 9 supplied from the thread supply mechanism 11 can be accommodated in the hollow portion and fed out from the tip portion 13a at the lower end. If the thread penetrating needle 13 is pierced into the sheet material 7 from above and pulled out, the thread 9 can be passed through the sheet material 7.

  The cutting head 3 is provided with a housing 17 that houses a drop prevention mechanism 14, a cutting mechanism 15, and a thread presser 16. Although the cutting head 3 is also provided with an elevating mechanism for elevating and lowering the yarn penetrating needle 13 and the housing 17 separately, illustration is omitted. Control means 20 for controlling the cutting head 3 and the cutting table 2 is provided below the cutting table 2. The perforation position 7a through which the thread 9 penetrates the sheet material 7 is previously set by data, and is controlled by the control means 20 so that the cutting head 3 moves according to the data. The holding and releasing of the yarn 9 by the yarn presser 16 and the raising / lowering of the housing 17 are controlled by the control unit 20 as a yarn feeding unit for feeding the yarn 9 from the yarn penetrating needle 13 as will be described later. The cutting head 3, functioning as the moving means, the thread supplying mechanism 11, the thread holding mechanism 12, the slip-off preventing mechanism 14 and the cutting mechanism 15, and the thread retainer 16 and the housing 17 functioning as the thread feeding means are implemented in this embodiment. An example sheet material threading device 10 is included. However, a mechanism for directly raising and lowering the removal prevention mechanism 14, the cutting mechanism 15, and the thread presser 16 may be provided without providing the housing 17.

  The control means 20 controls the thread penetrating needle 13, the thread presser 16 and the cutting mechanism 15 to pass the thread 9 to the perforating position 7 a with the thread penetrating needle 13, and then moves the thread penetrating needle 13 to the sheet material 7. Pull upward from the surface. Next, the housing 17 is raised, the yarn 9 extending downward from the raised yarn penetrating needle 13 is held by the yarn presser 16, and the housing 17 is lowered while holding the yarn 9. The thread 9 is drawn downward from the tip 13a of the thread penetration needle 13. The cutting mechanism 15 cuts the yarn 9 extending downward from the yarn penetrating needle 13. The yarn 9 fed out from the side of the yarn penetrating needle 13 that supplies the yarn 9 can be added to the yarn length when the yarn 9 is passed through the surface of the sheet material 7 and left as the mark yarn 9a. . Further, if the lifting / lowering range of the housing 17 is adjusted, the length of the yarn 9 fed out changes, so that the yarn length remaining on the surface of the sheet material 7 can also be adjusted.

  The slip prevention mechanism 14 allows the thread 9 to penetrate the sheet material 7 with the thread penetrating needle 13 and then forms a knot as a slip prevention part 14 a on the thread 9 above the sheet material 7. As a knot forming mechanism, for example, a mechanism known in JP-A-6-250147 is used as a knotter. The cutting mechanism 15 cuts the upstream side of the yarn 9 in which the drop prevention portion 14a is formed. The sheet material 7 side of the yarn 9 cut by the cutting mechanism 15 comes out of the removal prevention mechanism 14 and falls onto the surface of the sheet material 7 and remains as a mark yarn 9a.

  In the mark thread 9a, the slip-off preventing mechanism 14 is formed above the sheet material 7 by the slip-off preventing mechanism 14, so that the sheet material 7 does not slip downward even while the sheet material 7 is sucked and held from below. Can be. Further, when the cutting table 2 conveys the sheet material 7 as a conveyor belt, there is a possibility that the mark thread 9a that is exposed on the bottom surface of the sheet material 7 is rubbed and pulled on the comb 2c or the table 2d on the carry-out side. . If the drop prevention portion 14a is formed, even if the mark yarn 9a is pulled downward, the drop prevention portion 14a is caught on the surface of the sheet material 7 so that the entire mark yarn 9a does not fall downward. be able to. In addition, since the yarn length of the mark yarn 9a to be left on the surface of the sheet material 7 is increased, it is possible to make it difficult to drop downward even when the removal preventing portion 14a is not formed. Further, when the plurality of laminated sheet materials 7 are left through the mark thread 9a with a sufficient thread length, and when the sheet material 7 is separated one by one from the laminated state, the remaining mark thread 9a is left to a certain length. In some cases, it may be cut and added. In this case, it is necessary to leave at least the yarn length as the total length to be cut and added to each sheet material 7 in a state of penetrating the punching position 7a as a whole of the mark yarn 9a.

  Further, in the present embodiment, the cutting head is controlled by the control means 20 so that the direction in which the mark yarn 9a is pulled out and left on the surface of the sheet material 7 is not likely to be cut when the outer shape of the part is cut in the cutting process. 3 is moved. Accordingly, it is possible to add the mark thread 9a while cutting the sewing parts and the like with the cutting machine 1 and reliably leave the mark as a mark for marking in the sewing process or the like. Further, since the mark yarn 9a can be left for a long time, after using the colored yarn 9 or coloring the mark yarn 9a, the both ends of the mark yarn 9a are held, and the sheet Marking similar to that of Patent Document 1 can also be performed by reciprocating between the front surface side and the back surface side of the material 7.

  2 to 6 show the operation when the mark yarn 9a is left on the surface of the sheet material 7 in the sheet material threading device 10 of FIG. (A) of FIG.2, FIG.3, FIG.5 and FIG.6 shows the cross section of (b) of each figure seen from cut surface line AA shown in FIG.2 (b). Further, the cutting head 3, the thread holding mechanism 12, the driving source of the cutting mechanism 15, the lifting mechanism of the thread penetrating needle 13, the lifting mechanism of the housing 17 that houses the drop prevention mechanism 14, the cutting mechanism 15, and the thread presser 16. The illustration is omitted. In the present embodiment, the lifting mechanism for the thread penetration needle 13 and the housing 17 uses a pneumatic cylinder as a drive source, and allows the thread penetration needle 13 and the housing 17 to be raised and lowered within the range of the operation stroke of the pneumatic cylinder.

  FIG. 2 shows a process in which the sheet material threading device 10 moves in a direction parallel to the surface of the cutting table 2 by moving the cutting head 3 as the moving means along the cutting table 2. In the present embodiment, the drop prevention mechanism 14 is housed in the housing 17 together with the cutting mechanism 15 and the thread presser 16. The bottom surface of the housing 17 serves as a fabric retainer 17a that presses the surface of the sheet material 7. The fabric retainer 17a is provided with a lower hole 17b that is inserted downward. An upper hole 17c inserted upward from the housing 17 is also provided, and the thread penetrating needle 13 can be inserted therethrough. In this step, the housing 17 is lifted so that the dough presser 17a floats from the surface of the sheet material 7. The thread penetrating needle 13 is also raised to a position where the tip end portion 13a is pulled into the housing 17. The end portion of the yarn 9 fed out from the tip end portion 13 a of the thread penetration needle 13 is held by an end holding mechanism 15 a provided in parallel with the cutting mechanism 15.

  The output shaft 18a of the motor 18 of the motors 18 and 19 serving as the drive source of the slip-off prevention mechanism 14 rotates around the vertical axis, and the bevel gear 18b is attached, and the bevel gear 18c is engaged. A hook 18d for knot formation is attached to the tip of the shaft of the bevel gear 18c. The output shaft 18a can also angularly displace a lever 18e for removing the thread 9 hung on the hook 18d. The output shaft 19a of the motor 19 angularly displaces a guide member 19b that guides the yarn 9 so as to be hooked on the hook 18d. A thread retainer 16 is provided in the vicinity of the lower hole 17b. The configuration of the thread retainer 16 will be described later.

  FIG. 3 shows a process in which the cutting head 3 is moved to the perforation position 7a through which the thread 9 penetrates the sheet material 7, and both the thread penetrating needle 13 and the housing 17 are lowered. The fabric presser 17 a on the bottom surface of the housing 17 presses the surface of the sheet material 7. The thread penetrating needle 13 continues to descend further and pierces the sheet material 7. While the thread penetration needle 13 descends, the thread holding mechanism 12 that descends simultaneously holds the thread 9, stops the supply of the thread 9 from the thread supply mechanism 11 side, and the thread 9 fed out of the tip end portion 13a It does not extend. The yarn holding mechanism 12 may not be provided depending on conditions such as the material of the sheet material 7 and the yarn 9 and the thickness of the yarn penetrating needle 13.

  The end holding mechanism 15 a releases the end of the held yarn 9 before the yarn penetrating needle 13 starts to descend. If the yarn holding mechanism 12 does not hold the yarn 9 including the case where the yarn holding mechanism 12 is not provided, the end holding mechanism 15a is not only before starting to lower the thread penetrating needle 13, but also during lowering or after lowering. The thread 9 can be released at this timing. In this case, if the timing is early, the length of the yarn 9 coming out from the tip portion 13a is short, and if the timing is late, the length is long.

  FIG. 4 shows an operation of leaving the thread 9 on the surface of the sheet material 7 as the mark thread 9a after the piercing operation of the thread penetrating needle 13. FIG. 4A shows a state where the thread penetration needle 13 is pulled out from the punching position 7a of the sheet material 7 and is raised. The yarn 9 penetrates the sheet material 7 at the lower perforation position 7a, and further extends from the perforation position 7a to the tip portion 13a of the thread penetration needle 13.

  FIG. 4B shows a state where the housing 17 is raised. FIG. 4C shows a state in which the thread retainer 16 is operated and the thread 9 is sandwiched from both sides in the raised housing 17. The thread retainer 16 is a path in which the thread 9 hangs down from the tip end portion 13a of the thread penetrating needle 13, and can be sandwiched and held from both sides of the thread 9 so as not to disturb the position of the thread 9. It should be noted that the raising of the thread penetrating needle 13 in FIG. 4A and the raising of the housing 17 in FIG.

  Further, if the thread retainer 16 can be lifted and lowered within the housing 17, only the thread retainer 16 may be lifted and lowered. When the thread presser 16 is moved up and down, the thread retainer 16 is raised in the housing 17 in the stage of FIG. 4A, and then the thread retainer 16 is lowered with the thread retainer 16 sandwiched by the thread retainer 16. A state corresponding to 4 (e) can be obtained. In this case, the housing 17 does not have to be raised as shown in FIGS. 4B and 4C.

  FIG. 4D shows a state in which the housing 17 is lowered and the surface of the sheet material 7 is pressed by the fabric presser 17a on the bottom surface while the yarn 9 is held with the yarn presser 16 held therebetween. The thread 9 is held by the thread retainer 16 and pulled down. If the holding of the yarn 9 by the yarn holding mechanism 12 shown in FIG. 1 is released, the yarn 9 is supplied from the yarn supply mechanism 11 via the yarn penetrating needle 13 and added to the yarn 9 remaining on the surface of the sheet material 7. Is done. The yarn 9 is formed with a slip prevention portion 14a and is cut. Of the cut yarn 9, the end of the yarn penetrating needle 13 on the tip portion 13a side is held by the end holding mechanism 15a.

  FIG. 4E shows a state in which the thread 9 held by the thread retainer 16 is released and the housing 17 is raised. The thread 9 on the sheet material 7 side after cutting falls downward and remains on the surface of the sheet material 7 as a mark thread 9a. Since the yarn 9 is pulled down to the mark yarn 9a in FIGS. 4C and 4D, the overlapping portion 9b can be added to increase the yarn length. When the thread retainer 16 can be raised and lowered within the housing 17, if the housing 17 and the thread retainer 16 are lifted / lowered together, the thread length to be pulled down can be made longer than when only the housing 17 is lifted / lowered.

  FIG. 5 corresponds to FIG. 4D and shows the operation of forming the drop prevention part 14a shown in FIG. The thread penetration needle 13 is pulled out from the sheet material 7 and raised. The housing 17 is in a lowered state. The yarn 9 is drawn from the tip end portion 13 a of the yarn penetrating needle 13 to the perforating position 7 a of the sheet material 7. In the housing 17, the drop prevention mechanism 14 forms a drop prevention portion 14 a by a knot on the thread 9. The thread presser 16 is pressed so as to prevent the thread 9 from being supplied from the lower side penetrating the sheet material 7 when the slip prevention mechanism 14 forms the slip prevention part 14a. In order to form a knot, the guide member 19b is angularly displaced and guided so that the thread 9 is hooked on the hook 18d. The yarn 9 is also hooked on the end holding mechanism 15 a of the cutting mechanism 15. Next, the hook 18d is rotated and the thread 9 is wound around. Next, the lever 18e is angularly displaced, and the thread 9 is removed from the hook 18d.

  Next, simultaneously with holding the yarn 9 by the end holding mechanism 15a, the cutting mechanism 15 cuts the yarn 9 on the side extending from the sheet material 7. When the holding of the thread 9 by the thread retainer 16 is released and the housing 17 is raised, the cut thread 9 passes through the lower hole 17b and is drawn out below the fabric retainer 17a, and is used as a mark thread 9a on the sheet material 7. Remains. In this way, since the thread 9 is held by the thread retainer 16, the thread 9 can be reliably cut by the cutting mechanism 15, but even if the thread retainer 16 releases the thread 9, the cutting mechanism 15 cuts the thread 9. Is possible.

  It should be noted that the removal preventing portion 14a may be configured so that the mark yarn 9a is difficult to come off from the sheet material 7. Therefore, not only a knot may be formed in the middle of the yarn 9 before cutting, but it may be tied to another yarn with a knotter or connected to another yarn with a splicer that loosens and entangles the end of the yarn. Further, in the slip-off preventing portion 14a, processing may be performed to enlarge the diameter of the yarn 9, or another material may be added. Furthermore, when the resistance for the mark yarn 9a to escape the sheet material 7 is large, or when the yarn length remaining on the surface of the sheet material 7 is long, the removal preventing portion 14a may not be formed.

  FIG. 6 shows a state in which the yarn 9 remains as the mark yarn 9a on the surface of the sheet material 7 after the yarn 9 is cut as shown in FIG. 4 (e). Since the overlapping portion 9b is added to the mark yarn 9a, the yarn length can be increased. The superimposing portion 9b is formed when it is held and pulled down by the thread presser 16, and if the lifting / lowering is performed by a ball screw or a rack and pinion mechanism, the thread length can be adjusted by adjusting the lifting / lowering amount. Furthermore, the holding and releasing by the thread retainer 16 can be repeated as the housing 17 is raised and lowered, so that the thread length remaining on the surface of the sheet material 7 can be further increased.

  In this embodiment, the overlapping portion 9b is formed by lifting and lowering the thread retainer 16 provided at the bottom of the housing 17 together with the housing 17. However, the thread retainer 16 is provided in the housing 17 independently of the housing 17, for example. You may make it raise / lower.

  7 and 8 show the configuration and operation of the thread retainer 16 of FIG. The thread retainer 16 is provided around the lower hole 17 b at the bottom of the housing 17, and includes a solenoid 40, a pushing member 41, and a pullback member 42. As shown in FIG. 7, the pressing portion 41 a of the pushing member 41 and the pressing portion 42 a of the retracting member 42 are separated from the yarn 9 when the yarn 9 inserted through the lower hole 17 b cannot be pressed. As shown in FIG. 8, in a state where the thread 9 is pressed, the pressing portions 41 a and 42 a on both sides of the path of the thread 9 are pinched from both sides so as not to change the path of the thread 9. Since the path does not change even if the thread 9 is pressed, the operation of holding the thread 9 and pulling it down and the operation of forming the slip-off prevention part 14a can be performed stably and reliably.

  The pushing member 41 and the pulling-back member 42 are coupled to both ends of the lever 43. The lever 43 is oscillated and displaced about an intermediate oscillating shaft 44. The push-out member 41 is provided with a guide long hole 41b and a guide notch 41c, and the pull-back member 42 is provided with a guide long hole 42b, into which guide shafts 45 and 46 are respectively inserted. The push-out member 41 and the pull-back member 42 are guided so as to move in the left-right direction in the figure by guide shafts 45 and 46 inserted into the guide notch 41c and the guide slots 41b and 42b, respectively. The pushing member 41 is coupled to the output shaft of the solenoid 40 and one end of the lever 43. The other end of the lever 43 is engaged with the recess 42 c of the pullback member 42. As a result, when the output shaft of the solenoid 40 is retracted, a released state in which the yarn 9 is not held is obtained as shown in FIG. When the output shaft of the solenoid 40 is pushed out, the thread 9 is held as shown in FIG. This state can be detected by the proximity sensor 48 by the detected screw 47 and recognized by the control means 20.

  The thread retainer 16 may be configured to retain the thread 9 from one side. However, if the thread 9 is held by pressing from one side, the path of the thread 9 changes. Therefore, when using the slip prevention mechanism 14, it is preferable to use the thread presser 16 that does not change the path. Further, as the yarn feeding means, for example, the yarn 9 may be rotated so as to be pulled down by being sandwiched between rollers. If a roller is used, the yarn 9 can be fed out from the tip 13a of the thread penetrating needle 13 without being raised or lowered.

  FIG. 9 shows an operation of leaving the thread 9 on the surface of the sheet material 7 while moving as a mark thread 9a in the sheet material threading device 10 of FIG. 4C and 4D are repeated a plurality of times, the tension of the thread 9 decreases or the thread 9 rises to the lower hole 17b, the upper hole 17c and the thread retainer 16 when the housing 17 is raised. A phenomenon may occur, and the yarn 9 may become slack, and the yarn length corresponding to the lifting stroke may not be paid out. As a countermeasure for this, for example, after the yarn 9 is fed out by two elevations, the sheet material threading device 10 is parallel to the surface of the sheet material 7 so long as the thread 9 penetrating the sheet material 7 is not pulled out. If it is moved in any direction, the yarn 9 can be stretched. As the moving direction, it is preferable to avoid the cutting line and face the inside of the cutting part.

  FIG. 9A shows the state of FIG. When the housing 17 is raised, an overlapping portion 9b is formed on the surface of the sheet material 7 as shown in FIG. FIG. 9C shows a state in which the cutting head 3 is moved in a range in which the thread retainer 16 is opened and the thread 9 is pulled out from the overlapping portion 9b remaining on the sheet material 7 side. The thread 9 below the fabric presser 17a can be loosened. Further, when the housing 17 is moved up and down, the yarn 9 is held and fed out from the tip end portion 13a of the yarn penetrating needle 13, and the yarn prevention portion 14a is formed to cut the yarn 9. As shown in FIG. It is possible to obtain a mark yarn 9a having a long overlapping portion 9c.

  In the embodiment described above, the cutting mechanism 15 and the end holding mechanism 15a are adjacent to each other, and the yarn 10 is held and cut simultaneously. However, the cutting mechanism 15 and the end holding mechanism 15a may be separated to hold and cut the yarn 10 at different timings. For example, the end holding mechanism 15a holds the thread 9 before cutting by the cutting mechanism 15, or the end holding mechanism 15a holds the thread 9 hanging from the tip 13a of the thread penetrating needle 13 after cutting by the cutting mechanism 15. It may be.

  Further, the sheet material thread punching device 10 uses the cutting head 3 as a moving means to move the thread penetrating needle 13 and the housing 17 to the punching position 7a, but independently of the cutting head 3. A moving mechanism can also be provided. For example, a mechanism that is supported by the Y beam 4 and moves in the Y direction, or a mechanism that moves separately from the Y beam 4 in the XY direction along the surface 2a of the cutting table 2, includes the yarn supply mechanism 11 and the yarn holding mechanism. The mechanism 12, the thread penetrating needle 13, the drop prevention mechanism 14, the cutting mechanism 15, the end holding mechanism 15a, and the housing 17 may be provided. Further, the movement may be relative, or part or all of the movement may be performed on the sheet material 7 side. For example, a moving means is provided in a part where the sheet material 7 is carried into the cutting table 2 or a sheet spreader for laminating the sheet material 7 so that the mark thread 9a penetrates the perforating position 7a. It can also be left on the surface.

DESCRIPTION OF SYMBOLS 1 Cutting machine 2 Cutting table 3 Cutting head 5 Cutting blade 7 Sheet material 7a Perforation position 9 Yarn 9a Marking thread 9b, 9c Superposition part 10 Sheet material thread percussion device 11 Yarn supply mechanism 12 Yarn holding mechanism 13 Yarn penetration needle 14 Detachment Preventing mechanism 14a Escape prevention part 15 Cutting mechanism 15a End holding mechanism 16 Thread presser
17 Housing 20 Control means

Claims (4)

A threading device for a sheet material that leaves a mark thread through the perforated position of the sheet material,
Moving means capable of relative movement in a direction parallel to the surface of the sheet material;
A thread supply mechanism for supplying the thread;
A thread penetrating needle that can move up and down with respect to the sheet material, and pierces the sheet material from above and pulls it out, leaving the thread supplied from the thread supply mechanism as a mark thread, in a state of penetrating the sheet material,
Thread feeding means for passing the thread through the sheet material, being arranged facing the path of the thread extending downward from the thread penetrating needle in a state of being pulled out and raised, and feeding the thread from the thread penetrating needle;
A cutting mechanism for cutting a thread extending downward from the thread penetrating needle in the raised state,
A threading device for sheet material, comprising: The thread feeding means presses and holds the thread, descends while retaining the thread, and then releases the thread presser,
The sheet material threading device according to claim 1, further comprising: The moving means is
After the yarn feeding means feeds the yarn from the yarn penetrating needle, the yarn penetrating needle, the yarn feeding means, and the cutting mechanism are moved in a direction parallel to the surface of the sheet material,
Giving tension to the thread extending between the thread penetrating needle and the perforating position,
3. A sheet material threading device according to claim 1, wherein the sheet material is threaded. Further comprising a slip-off preventing mechanism that is disposed between the thread penetrating needle in the raised state and the feeding means, and that forms a slip-off preventing portion in the thread extending downward from the thread penetrating needle.
The yarn threading device for a sheet material according to any one of claims 1 to 3, wherein

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