JP6004937B2 - Sheet material threading device and method, and marking thread adding method in cutting machine - Google Patents

Description

  The present invention relates to a sheet material threading device and method, and a marking yarn adding method using a cutting machine, in which a thread for marking in a post-cutting process is left through a sheet material to be cut into parts. In the following description, regarding a portion related to yarn supply, a supply destination is described as a distal end portion or a distal end side, and a supply source is described as a proximal end portion or a proximal end side.

  Conventionally, as a part for sewing clothing, a cutting machine has been used to efficiently cut and manufacture sheet materials such as fabrics one by one or in a state where a plurality of sheets are laminated. Yes. The sheet material is cut by the cutting blade of the cutting machine while being placed on the cutting table of the cutting machine and sucked and held. The cutting blade not only cuts the outer shape of the part, but can also cut a notch to be used as a marking for alignment when sewing the part in a later process. For marking, not a notch but a hole by perforation may be used. In that case, a punch or drill for perforation is provided in the cutting head.

  Marking with a notch or a hole removes the sheet material to which the marking has been added, which may be undesirable in terms of the appearance of clothing or the like. In such a case, it is preferable to mark with a color different from that of the sheet material using chaco or the like. A marking device using a dye-attached yarn that performs marking with a dye using a cutter is also proposed (see, for example, Patent Document 1). In this marking device, a thread to which a dye is attached is prepared in advance and is inserted through a hole provided near the tip of the needle. When the thread is moved in a state where the eye holes of the needle penetrate the sheet material downward, the sheet material at the portion where the needle is stuck can be colored with a dye. In addition, there are also proposed sewing mark applicators for marking by passing a thread through a sheet material or for manually coloring the thread that has penetrated using a chaco or the like (for example, a patent document) 2).

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

  The reason why the marking device as shown in Patent Document 1 is used is that if it is colored with a dye, it becomes a clear mark during sewing and can be easily removed from each leaf of the laminated sheet material by washing after sewing. Presumed to be. However, in the case where it takes a long time from the cutting with the cutting machine to the step of using the marking, the dye may fall from the colored portion and the marking may become unclear. Further, in the fifth column of page 5 of Patent Document 1, the left column (ninth column), the third to fourth rows, “The darkness of the mark can be increased by reciprocating the needle several times at the same point. . " This is presumed to suggest that there is a possibility that coloring with a dye-colored yarn may be insufficient depending on conditions.

  Even in a cutting machine, as shown in Patent Document 2, if a thread to be a mark is left, marking can be performed with chaco based on the mark thread in accordance with various requirements in the sewing process as a post process. Can do. However, when the yarn is left, there is a risk that the yarn may fall off the sheet material due to the downward suction during cutting by the cutting machine. The cutting table may have a transport function as a conveyor belt. In the case of having such a transport function, as shown in FIG. 2 of Patent Document 2, when a thread loop is formed below the sheet material, a comb-like shape provided on the exit side of the conveyor belt is formed. There is a risk that the thread may fall out of the comb.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet material threading device and method, and a marking thread addition method using a cutting machine, which can prevent the thread from coming off by passing the thread through the sheet material. .

The present invention is a sheet material threading device that leaves a thread penetrating at a preset position in a sheet material,
A thread supply mechanism capable of supplying a thread;
A thread penetrating needle that is movable to the perforation position of the sheet material, pulled out from the sheet material once pierced into the perforation position, and feeds the yarn supplied from the thread supply mechanism from the tip portion to penetrate the perforation position of the sheet material;
A slip-off prevention mechanism capable of forming a slip-off prevention portion for the thread between the tip portion and the perforation position of the thread penetrating needle pulled out after piercing the perforation position of the sheet material,
A cutting mechanism that cuts the thread, in which the slip prevention part is formed by the slip prevention mechanism, between the slip prevention part and the tip of the thread penetrating needle;
A holding mechanism for holding the thread cut by the cutting mechanism on the tip side of the thread penetrating needle,
It is the thread | yarn threading device of the sheet | seat material characterized by including.

  In the invention, it is preferable that the drop prevention mechanism forms a knot on the yarn to form the drop prevention portion.

Further, the present invention is provided between the slip prevention mechanism and the sheet material, and when the slip prevention mechanism forms the slip prevention part, the yarn is supplied from the side penetrating the sheet material. Further including a thread presser mechanism for pressing to prevent
It is characterized by that.

Further, according to the present invention, the slip prevention mechanism is advanced and retracted to a position where a slip prevention portion can be formed with respect to the thread between the leading end portion of the thread penetrating needle that has been pulled out after piercing the perforation position of the sheet material and the perforation position. Advancing and retreating mechanism,
It is further characterized by including.

Further , the drop prevention mechanism performs a process of increasing the diameter at least partially on the yarn as the drop prevention portion.
Ru can also.

Moreover, the yarn, the resin material,
The drop prevention mechanism performs a process of partially heating the yarn to deform the cross-sectional shape,
Ru can also.

Moreover, the yarn, the resin material,
The slip-off prevention mechanism deforms the cross-sectional shape by subjecting the thread to partial crushing.
Ru can also.

Further, the detachment prevention mechanism, to the yarn, giving the process of depositing different materials than the yarn, to form extension part of the yarn is increased,
Ru can also.

In addition , the drop prevention mechanism attaches resin to the yarn.
Ru can also.

Further , the slip-off prevention mechanism attaches a seal to the yarn.
Ru can also.

Further , the drop prevention mechanism is formed by sticking the yarn to the surface of the sheet material, the drop prevention portion.
Ru can also.

  The present invention is also characterized in that it is provided in a cutting head of a cutting machine.

In the present invention, the thread penetrating needle is a tube extending in the axial direction, and has a shaft portion through which a thread supplied from the thread supply mechanism is inserted into a hollow portion.
The tip is
Formed at the tip of the shaft,
A positive slope with a shape cut at an acute angle to the axis;
The back side of the positively inclined surface has a back inclined surface with a shape cut at an acute angle with respect to the axis from both sides so as to be tapered.
It is characterized by that.

Furthermore, the present invention is a thread perforation method for a sheet material that is left by penetrating a thread at a preset perforation position in the sheet material,
Move the thread penetrating needle that feeds the yarn from the tip part to the perforation position, puncture the perforation position of the sheet material from the tip part side, and then pull out from the sheet material,
For the yarn between the tip of the thread penetrating needle pulled out from the perforated position and the perforated position, a drop prevention part is formed,
Cut the thread formed with the slip prevention part between the slip prevention part and the tip of the thread penetrating needle,
Leave the perforated position side of the cut thread as a mark thread on the surface of the sheet material,
This is a method for threading a sheet material.

In the present invention, the cutting machine for cutting the sheet material has a cutting table having a transport function, and a comb is provided on the carry-out side of the cutting table,
The mark yarn is folded under the sheet material to form a U-turn portion, and when both ends of the mark yarn protrude above the sheet material, the drop prevention portion is formed only at one end.
It is characterized by that.

Further, according to the present invention, the sheet material sucked and held from below on the cutting table is cut according to preset cutting data with a cutting blade provided on a cutting head that moves along the surface of the cutting table. A cutting machine that performs operations including
The cutting head is provided with a thread penetrating needle that pierces from above the sheet material and penetrates the thread used for marking in a post-process after cutting up and down the sheet material,
A marking thread adding method using a cutting machine, wherein a mark threading needle penetrates a sheet material with a thread penetrating needle, and a slip prevention portion is formed in an upper portion of the sheet material.

  According to the present invention, the yarn supplied from the yarn supply mechanism is made to penetrate the perforated position of the sheet material with the thread penetrating needle, and the escape prevention mechanism is formed on the yarn remaining on the surface of the sheet material from the perforated position. Therefore, it is possible to prevent omission.

  In addition, according to the present invention, the knot is formed on the yarn to form the drop prevention portion, so that the use of only the yarn can surely prevent the drop.

  Further, according to the present invention, when forming the slip-off preventing portion, the thread holding mechanism can be operated so that the mark thread penetrated through the sheet material is not pulled upward.

  Further, according to the present invention, the yarn supplied from the yarn supply mechanism is penetrated to the perforated position of the sheet material by the thread penetrating needle, and a slip prevention portion is formed on the yarn remaining on the surface of the sheet material from the perforated position. Prevention can be achieved. The slip prevention part is formed by extending the slip prevention mechanism to a position where the slip prevention part can be formed with respect to the yarn by the advancing and retreating mechanism. It is possible to shorten the length of the yarn extending from the thread.

Further, the falling off preventive portion, lever be formed by machining to enlarge the diameter of the yarn at least partially, it is possible to form a falling off preventive portion by deformation of the yarn itself, the falling off preventive portion below the seat member at the perforations position It can be difficult to escape.

Further, the thread of material is a resin, strain relief is lever to heat the yarn partially, or softened yarn is heated, or by melting, the sectional shape becomes flattened, at least one direction The diameter increases, and it can be prevented from coming out below the sheet material at the perforated position.

Also, According to the invention, yarn material is a resin, strain relief is yarn partially crushed, at least in one direction increases the diameter in cross section, below the sheet material at the perforations position Can be prevented.

Also, lever to form a falling off preventive portion by machining to deposit different materials and thread yarn, the diameter of the formed portions falling off preventive portion is larger than the diameter of the thread, below the sheet material at the perforations position It can be prevented from coming out. Since it is not necessary to directly process the yarn, the range of materials that can be used as the yarn can be widened.

Further, it is possible to form lever to adhere the resin to the yarn, the falling off preventive portion. The resin can be attached in a liquid state by melting by heating or melting by a solvent.

Also, lever to adhere the seal to the yarn, the adhesion portion of the seal can be prevented escape beneath the sheet material at the perforations position.

Moreover, the yarn by forming a falling off preventive portion pasted onto the surface of the sheet material, it is possible to thread kept stopped so as not come out below the sheet material at the perforations position.

  Further, according to the present invention, since the sheet material threading device is provided in the cutting head of the cutting machine, it moves along the surface of the sheet material placed on the cutting table of the cutting machine in the same manner as the cutting blade. Can be made.

  Further, according to the present invention, the distal end portion of the tubular shaft portion of the thread penetration needle has an acute angle with respect to the axis line from both sides on the back side of the positive inclination surface, along with the positive inclination surface having a shape cut at an acute angle with respect to the axis line. Since it has the back inclined surface of the shape cut | disconnected, it can put the most pointed end inside radial direction rather than the outer periphery of an axial part. Since the tip of the tip is inside the outer periphery, the thread penetration needle improves the piercing performance when piercing the sheet material, improves the straightness after piercing, and makes the sheet material difficult to damage. Can do. Further, since the thread is inserted through the hollow shaft portion, the thread housed in the shaft portion can be prevented from coming into contact with the sheet material when the thread penetrating needle is pierced into the sheet material. Even if the sheet material is sucked and held, the suction force also acts on the hollow shaft portion, so that the thread can be prevented from rising when the thread penetrating needle is pierced into the sheet material and then raised. .

  Furthermore, according to the present invention, the thread can be penetrated to the perforated position of the sheet material, and the slip prevention portion can be formed and left in the portion above the sheet material by the thread. Even if the sheet material is sucked and held from below the cutting table of the cutting machine, the yarn on which the removal preventing portion is formed does not come off, so that it becomes a mark for marking in the post-cutting process. It is possible to reliably leave the yarn.

  Further, according to the present invention, the cutting table has a conveying function, a comb is provided on the carry-out side, a mark yarn is folded under the sheet material to form a U-turn portion, and both ends are above the sheet material. When coming out, a drop prevention part is formed only at one end. Even if the U-turn part is caught by the comb, one end that does not form the drop prevention part is pulled downward from above the sheet material, and the U-turn part disappears, and the catch can be eliminated.

  Furthermore, according to the present invention, it is possible to reliably add a yarn for a mark for marking using various functions provided in the cutting machine.

FIG. 1 is a side cross-sectional view illustrating a schematic configuration of a cutting machine 1 including a sheet material threading device 10 according to a first embodiment of the present invention. FIG. 2 is a cross-sectional plan view and a side cross-sectional view showing the operation in one step when the slip prevention device 14 of the yarn punching device 10 of FIG. 1 forms the slip prevention portion 14a. FIG. 3 is a cross-sectional plan view and a side cross-sectional view showing the operation in the step following FIG. 2 when forming the slip prevention part 14a by the slip prevention mechanism 14 of the sheet material threading device 10 of FIG. FIG. 4 is a cross-sectional plan view and a side cross-sectional view showing the operation in the step following FIG. 3 when the drop prevention mechanism 14a is formed by the drop prevention mechanism 14 of the sheet material threading device 10 of FIG. FIG. 5 is a plan sectional view and a side sectional view showing an operation in a step following FIG. 4 when the slip prevention device 14 of the yarn punching device 10 of FIG. 1 forms the slip prevention portion 14a. 6A and 6B are a plan sectional view and a side sectional view showing an operation in a process subsequent to FIG. 5 when the slip prevention unit 14a is formed by the slip prevention mechanism 14 of the yarn punching device 10 of FIG. FIG. 7 is a cross-sectional plan view and a side cross-sectional view showing the operation in the process following FIG. 6 when the drop prevention mechanism 14a is formed by the drop prevention mechanism 14 of the sheet stitching device 10 of FIG. FIG. 8 is a diagram schematically showing the configuration of the mark yarn 9a formed through the steps of FIGS. FIG. 9 is a diagram showing a form that can be formed as a mark yarn 9a. FIG. 10 is a front view, a side view, and a perspective view showing the shape of the distal end portion 13a of the thread penetration needle 13 of FIG. FIG. 11 is a side cross-sectional view schematically showing the operation of passing the thread 9 through the sheet material 7 in the sheet material threading device 20 as the second embodiment of the present invention. FIG. 12 is a schematic side cross-sectional view showing the operation of forming the slip prevention part 24a on the yarn 9 by the slip prevention mechanism 24 of the sheet stitching device 20 of FIG. FIG. 13 is a schematic side cross-sectional view showing the operation of forming the slip prevention part 34a on the yarn 9 by the slip prevention mechanism 34 of the thread punching device 30 according to the third embodiment of the present invention. FIG. 14 is a schematic side cross-sectional view showing the operation of forming the slip prevention part 44a on the thread 9 by the slip prevention mechanism 44 of the sheet material thread striking device 40 that is Embodiment 4 of the present invention. FIG. 15 is a schematic side cross-sectional view showing the operation of forming the slip prevention part 54a on the yarn 9 by the slip prevention mechanism 54 of the thread punching device 50 according to the fifth embodiment of the present invention.

  1 to 10 show the configuration and operation of a sheet material threading device 10 provided in the cutting machine 1 as Embodiment 1 of the present invention. In order to simplify the explanation, in the plan sectional view and the side sectional view shown in parallel in FIGS. 2 to 7, the corresponding configuration is shown only on one side and may be omitted on the other side. FIG. 11 and FIG. 12 show a simplified configuration and operation of the removal prevention mechanism 24 of the sheet material threading device 20 according to the second embodiment of the present invention. Further, FIGS. 13, 14 and 15 show the configuration and operation of the slip prevention mechanisms 34, 44, 54 of the sheet material threading devices 30, 40 of the third, fourth, and fifth embodiments of the present invention. Simplified and shown respectively. In addition, the matter common to each Example is demonstrated in Example 1, and description may be abbreviate | omitted in another Example. In addition, portions that are not described in the drawings to be described may be referred to with reference numerals described in other drawings.

  In each embodiment, the stacked sheet material 7 is placed on the cutting table 2 of the cutting machine 1, and the sheet material threading device 10, 20, 30, 40 moves along the surface of the cutting table 2. , 50, the thread 9 is passed through the sheet material and left. The sheet material threading devices 10, 20, 30, 40, and 50 are moved in the XY two-dimensional direction together with the cutting head 3 of the cutting machine 1, but move independently of the cutting head 3. You may do it. If the sheet head can be moved independently of the cutting head 3, the sheet material threading device 10, 20, 30, 40, 50 can be expanded, for example, by the sheet material 7 loading path to the cutting table 2 or the sheet material 7. It can also be provided on a stacking table or the like. If the sheet material threading device 10, 20, 30, 40, 50 is combined with the conveyance of the sheet material 7, the sheet material 7 can be moved in a one-dimensional direction in the direction perpendicular to the conveyance direction, and the two-dimensional It can also be moved.

  12, 13, 14, and 15, the bottom surface of the housing 16 that holds the surface of the sheet material 7 is lifted from the surface of the sheet material 7. 44a and 54a can also be formed. If the removal preventing portions 24a, 34a, 44a, 54a are formed in a state where the surface of the sheet material 7 is pressed by the bottom surface of the housing 16, the necessary length of the yarn 9 can be shortened. Although the main part of the sheet material threading device 10, 20, 30, 40, 50 is housed in the housing 16, a part or the whole of the device may be exposed to the outside.

  The sheet material 7 presupposes that the outer periphery is cut and separated into parts in a state where a plurality of sheets are laminated, but the present invention can be similarly applied even when only one sheet is cut. . Further, the present invention can be applied not only to cutting into parts but also to trimming in which a band is cut with a certain width.

  FIG. 1 shows a schematic configuration of a sheet material threading device 10 provided in a cutting machine 1 as Embodiment 1 of the present invention. The cutting machine 1 includes a cutting table 2 and a cutting head 3. The cutting head 3 is movable along a Y beam 4 laid on the cutting table 2 in a direction perpendicular to the paper surface. The Y beam 4 is supported by a moving mechanism (not shown) on both sides of the front side and the back side of the paper surface and can 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 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 performs an operation including cutting a sheet material 7 whose surface is pressed by a material presser 6 with a cutting blade 5 provided on the cutting head 3 according to preset cutting data.

  In order to suck and hold the sheet material 7 from below the cutting table 2, the surface of the sheet material 7 is covered with a sealing sheet 8 made of a non-breathable synthetic resin film, and is cut into the sheet material 7 from above the sealing sheet 8. The blade 5 is pierced from above and cut. The surface 2a of the cutting table 2 is formed of bristles at the end of the bristle block 2b, with the synthetic resin bristle blocks 2b arranged so that the cutting blade 5 is not easily cut even if it enters. The cutting table 2 in which the bristle blocks 2b are arranged has a conveying function as a conveyor belt. Since the bristle block 2b rotates at the end in the transport direction, the end of the bristle block 2b rises to a position higher than the surface 2a of the cutting table 2. At the stepped portion that transitions from the front surface 2a to the end on the carry-out side, there is provided a comb 2c in which the surface is inclined and claws are arranged at intervals in a direction perpendicular to the paper surface, and then transitions to a flat table 2d. . In the comb 2c, the claw enters the bristles of the bristle block 2b so that the sheet material 7 and the like to be carried out are not wound around the end portion and are transferred to the carry-out table 2d.

  The sheet material thread punching device 10 is provided with a thread supply mechanism 11 that can supply a thread 9 for marking in a subsequent process in a cutting process of cutting the sheet material 7. The yarn supply mechanism 11 can set the yarn package 11a and supply the yarn 9 through the yarn guide 11b. The cutting head 3 is provided with a holding mechanism 12, a thread penetration needle 13, a drop prevention mechanism 14, and a cutting mechanism 15 in a state of being housed in a housing 16. The holding mechanism 12 can hold the yarn 9 supplied from the yarn supply mechanism 11. The thread penetrating needle 13 is hollow. If the thread 9 supplied from the thread supply mechanism 11 is accommodated in the hollow portion and pierced and pulled out from above the sheet material 7, the thread 9 penetrates up and down the sheet material 7. Can be made. The perforation position 7a, which is a position where the thread 9 penetrates the sheet material 7, is set in advance by data, and is controlled by the control unit of the cutting machine 1 so that the cutting head 3 moves according to the data.

  The drop prevention mechanism 14 of the present embodiment forms a knot as a drop prevention portion 14 a on the thread 9 above the sheet material 7 after the thread 9 penetrates the sheet material 7 with the thread penetrating needle 13. 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 yarn 9 on which the removal preventing portion 14 a is formed between the yarn penetrating needle 13 and the sheet material 7. The holding mechanism 12 holds the yarn penetrating needle 13 side of the yarn 9 cut by the cutting mechanism 15. The sheet material 7 side of the yarn 9 cut by the cutting mechanism 15 comes out of the housing 16, and the mark yarn 9 a remains on the sheet material 7. In the mark thread 9a, the slip-off preventing portion 14a is formed above the sheet material 7 by the slip-off preventing mechanism 14. Therefore, even when the sheet material 7 is sucked and held from below, it does not slip downward. Can be. In addition, even when the mark thread 9a coming out on the bottom surface of the sheet material 7 is rubbed and pulled during the movement on the carry-out table 2d or the like, the entire mark thread 9a can be prevented from coming off. . In this way, 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 it as a mark for marking in the sewing process or the like.

2 to 7 show an operation when the drop prevention part 14a is formed by the drop prevention mechanism 14 of FIG. (A) of each figure shows the cross section of (b) of each figure seen from cut surface line AA shown in FIG.2 (b). Further, illustration of the cutting head 3, the drive source of the holding mechanism 12 and the cutting mechanism 15, the lifting mechanism of the thread penetrating needle 13, and the lifting mechanism such as the housing 16 is omitted.
FIG. 2 shows a step of moving the sheet material threading device 10 to the perforating position 7 a by the cutting head 3 moving along the cutting table 2. In the present embodiment, the holding mechanism 12 and the cutting mechanism 15 are accommodated close to each other in the housing 16 of the removal prevention mechanism 14. The removal prevention mechanism 14 also has a support member 14 b in the housing 16. The housing 16 is provided with a lower hole 16b that is inserted downward on the bottom surface 16a and an upper hole 16c that is inserted upward on the upper surface so that the thread penetration needle 13 can be inserted therethrough. In this step, the housing 16 is lifted so that the bottom surface 16 a is floated from the surface of the sheet material 7. The thread penetrating needle 13 is also raised to a position where the lower end tip portion 13 a is pulled into the housing 16. The leading end of the thread 9 drawn from the leading end portion 13 a of the thread penetrating needle 13 is held by the holding mechanism 12.

  The removal prevention mechanism 14 includes motors 17 and 18 as drive sources. An output shaft 17a of the motor 17 extends downward from above, rotates around an axis in the vertical direction, and a bevel gear 17b is attached. The bevel gear 17c meshes with the bevel gear 17b. The shaft of the bevel gear 17c is supported by the support member 14b so as to be rotatable about a horizontal axis perpendicular to the vertical direction, and a knot-forming hook 17d is attached to the tip. The output shaft 17a can also angularly displace a lever 17e for removing the thread 9 hung on the hook 17d. The output shaft 18a of the motor 18 angularly displaces the guide member 18b that guides the thread 9 so as to be hooked on the hook 17d. A thread presser mechanism 19 is provided in the vicinity of the lower hole 16b. The thread presser mechanism 19 can use a motor, a cylinder, a solenoid, or the like, although illustration of a drive source and the like is omitted. Further, when the resistance of the thread 9 penetrating the sheet material 7 is large, the thread presser mechanism 19 may not be provided. Furthermore, if the thread 9 is wound along the surface of the sheet material 7 from the perforated position 7a and the bent portion is pressed by the bottom surface 16a of the housing 16, the resistance of the thread 9 can be increased.

  FIG. 3 shows a process in which the cutting head 3 moves to a position where the thread 9 penetrates the sheet material 7 and both the thread penetrating needle 13 and the housing 16 are lowered. The housing 16 has a bottom surface 16 a in contact with the surface of the sheet material 7.

  FIG. 4 shows a process in which only the thread penetration needle 13 continues to descend, the tip end portion 13b descends below the lower hole 16b of the housing 16, and penetrates the sheet material 7 up and down. The holding mechanism 12 releases the holding so that the held yarn 9 is released at the timing before the descent penetrating needle 13 starts to descend, during descent, or after descent. If the thread 9 is pulled while the thread penetrating needle 13 is being lowered, the thread 9 can be released simply by weakening the holding force without releasing the holding.

  FIG. 5 shows a process in which only the thread penetrating needle 13 is raised until the lower end tip portion 13 a is near the upper hole 16 c of the housing 16. From the tip end portion 13a of the thread penetrating needle 13, the thread 9 is fed out to a portion that penetrates the sheet material 7 at the perforating position 7a.

  FIG. 6 shows a process of forming a knot-removal prevention portion 14 a in the yarn 9 in the housing 16. The thread presser mechanism 19 is provided between the sheet material 7 and the hook 17 d and the lever 17 e that form a knot by the removal prevention mechanism 14. The thread retainer mechanism 19 retains the thread 9 so as to prevent the thread 9 from being supplied from the side penetrating the sheet material 7 when the slip prevention mechanism 14 forms the slip prevention part 14a. It is possible to prevent the thread 9 passed through the thread 9 from being pulled upward.

  Hereinafter, in order to form a knot, the guide member 17b is angularly displaced and guided so that the thread 9 is hooked on the hook 17d. The thread 9 is also hooked on the holding mechanism 12. Next, the hook 17d is rotated to wind the thread 9. Next, the lever 17e is angularly displaced, and the thread 9 is removed from the hook 17d.

  FIG. 7 shows a process of leaving the mark yarn 9 a on the sheet material 7. First, the presser of the thread 9 by the thread presser mechanism 19 is released. Next, simultaneously with holding the yarn 9 by the holding mechanism 12, the cutting mechanism 15 cuts the yarn 9 on the side extending from the sheet material 7. Next, when the housing 16 is raised, the cut yarn 9 passes through the lower hole 16b and falls onto the surface of the sheet material 7, and remains as a mark yarn 9a.

  In the embodiment described above, the holding mechanism 12 and the cutting mechanism 15 are adjacent to each other, and the yarn 9 is held and cut simultaneously. However, the holding mechanism 12 and the cutting mechanism 15 may be separated and the yarn 9 may be held and cut at different timings. For example, the holding mechanism 12 may hold the thread 9 before it is cut by the cutting mechanism 15, or the holding mechanism 12 may hold the thread 9 that hangs down from the tip 13 a of the thread penetrating needle 13 after being cut by the cutting mechanism 15.

  FIG. 8 shows the configuration of the mark yarn 9a remaining on the sheet material 7 in FIG. The sheet material 7 is penetrated by the penetrating portion 9b. A knot 9 c is formed above the sheet material 7. The knot 9c continues to the cut end 9e through the loop 9d. If the knot 9c is pulled toward the cut end portion 9e, the loop 9d is removed, and the knot 9c can be easily eliminated. However, even when pulled toward the penetrating part 9b, the knot 9c is only tightened, and the loop 9d does not come off. Therefore, the knot 9c and the loop 9d function as the disconnection prevention unit 14a. Since the knot 9c is formed on the yarn 9 to form the drop prevention portion 14a, the use of only the yarn 9 can surely prevent the drop.

  FIG. 9 shows a form of a slip-off preventing portion 14a that can be left on the sheet material 7 as a mark thread 9a. Since the slip-off preventing portion 14a is formed above the sheet material 7 by the slip-off preventing mechanism 14, it is possible to prevent the sheet material 7 from slipping downward while the sheet material 7 is sucked and held from below. It is possible to add the mark yarn 9a with the machine 1 and reliably leave it as a mark for marking.

  FIG. 9A, FIG. 9B, and FIG. 9C show forms formed by the operation described above. That is, the drop prevention mechanism 14, the cutting mechanism 15, and the holding mechanism 12 act on the thread 9 after being fed out from the hole of the tip end portion 13 a of the thread penetration needle 13. However, the lower end portion 9f has different forms depending on the timing when the holding mechanism 12 releases the end portion of the yarn 9. If the holding mechanism 12 releases the end portion of the yarn 9 before the yarn penetrating needle 13 starts to descend, the lower end portion 9f is likely to come out below the sheet material 7 as shown in FIG. When the holding mechanism 12 releases the end of the thread 9 during or after the thread penetrating needle 13 is lowered, the thread 9 is folded under the sheet material 7 as shown in FIG. 9B or 9C. A part of the lower end portion 9f remains inside the sheet material 7 or protrudes above the sheet material 7. For this reason, the U-turn part 9g is highly likely to be formed below the sheet material 7. If the timing at which the holding mechanism 12 releases the yarn end is adjusted, the state of the mark yarn 9a under the sheet material 7 can be adjusted.

  9 (d), FIG. 9 (e), and FIG. 9 (f), the timing at which the holding mechanism 12 releases the end of the yarn 9 is set after the lowering of the yarn penetrating needle 13, and the lower end 9f of the sheet material 7 The form which protrudes upwards and forms the prevention part 14a in the lower end part 9f is shown. In FIG. 9 (d), the removal preventing portion 14a is formed only at the lower end portion 9f. In FIG.9 (e), the common drop prevention part 14a is formed in the lower end part 9f and the cutting | disconnection edge part 9e side. In FIG. 9 (f), the disconnection preventing portion 14a is formed on both the lower end portion 9f and the cut end portion 9e side.

  When the U-turn portion 9g is formed below the sheet material 7 as shown in FIGS. 9B, 9C, 9D, 9E, and 9F, cutting is performed. There is a possibility of being caught by the claw of the comb 2c on the carry-out side of the table 2. 9 (b), 9 (c) and 9 (d), the slip-out preventing portion 14a is formed only at one end of the yarn that goes out above the sheet material 7, so that the slip-out preventing portion 14a is formed. The thread on the side that has not been removed comes off, the U-turn portion 9g disappears, and the catch is eliminated. In FIG. 9 (e) and FIG. 9 (f), since the U-turn portion 9g does not disappear even if it is caught by the claw of the comb 2c, the U-turn portion 9g is pulled by the claw. For this reason, there is a possibility that the mark thread 9a may be cut, or the drop prevention portion 14a may be pulled out below the sheet material 7, and the mark thread 9a may not remain on the sheet material 7. Therefore, when the cutting machine 1 uses the transport function, it is only necessary to prevent the removal preventing portion 14a from being formed in the forms of FIGS. 9 (e) and 9 (f).

  It should be noted that the drop prevention part 14a may be made difficult to penetrate the sheet material 7. Therefore, before cutting, not only a knot 9c provided in the middle of the yarn 9 as shown in FIG. 8 is formed, but also connected to another yarn with a knotter, or connected to another yarn with a splicer that loosens and entangles the end of the yarn. You can do it.

  FIG. 10 shows an example of the shape of the tip portion 13 a of the thread penetration needle 13. FIG. 10A shows a shape partially viewed from the front, and FIG. 10B shows a shape when FIG. 3A is viewed from the right side. 10 (c) and 10 (d) show shapes of FIG. 10 (a) as seen from the front side obliquely upward and obliquely downward, respectively. The thread penetration needle 13 has a tip end portion 13a at the tip end of the shaft portion 13b. The shaft portion 13b has a tubular shape extending in the direction of the axis 13c, and the yarn 9 supplied from the yarn supply mechanism 11 can be inserted into the hollow portion. The front end portion 13a has a positive inclined surface 13d that is cut at an acute angle with respect to the axis 13c, and back inclined surfaces 13e and 13f that are formed by cutting the back side of the positive inclined surface 13d at an acute angle with respect to the axis 13c from both sides. And have.

  By providing the back inclined surfaces 13e and 13f, the most distal end 13g can be put inside in the radial direction from the outer peripheral line of the shaft portion 13b. By entering the innermost tip 13g, it becomes easy to pierce the thread penetrating needle 13 into the sheet material 7, and the piercing performance is improved. Moreover, it becomes easy to go straight when penetrating into the sheet material 7 and the straightness is also improved. Furthermore, even if pierced, the sheet material 7 is hardly damaged, and damage can be prevented.

  When the thread 9 passes through the sheet material 7 in the state that the end fed out from the opening 13h inside the forward inclined surface 13d passes through the free end state released from the holding mechanism 12, the tip of the thread 9 is folded upward. It is easy to pass through the proximal end side portion 13i of the opening 13h. Therefore, it is preferable that the edge of the base end side portion 13i of the forward inclined surface 13d that is the cutting edge of the thread penetration needle 13 is rounded. If the yarn 9 is rounded, the yarn 9 can be prevented from being broken even when the yarn 9 is folded back at the proximal end portion 13i.

  As the thread penetrating needle 13, not only a hollow needle but also a sewing needle provided with a hole only near the tip of the needle or a hollow sewing needle provided with a hollow portion communicating with the eye hole can be used. Even when a hollow needle is used as the thread penetrating needle 13, the thread 9 may be inserted not only from the upper end to the lower end but also from the middle to the lower end as in this embodiment.

  FIG. 11 shows a schematic configuration of the sheet material threading device 20 according to the second embodiment of the present invention and an operation of passing the thread 9 through the sheet material 7. This configuration and operation are basically the same in the other embodiments described below.

  FIG. 11A shows a state where the bottom surface 16 a of the housing 16 is lifted from the surface of the sheet material 7 when the cutting head 3 moves along the cutting table 2. The thread penetration needle 13 is in a state where it is raised to a position where the tip portion 13a is pulled into the housing 16. The leading end of the thread 9 pulled out from the leading end portion 13 a of the thread penetrating needle 13 is held by the holding mechanism 12. A removal prevention mechanism 24 is provided in the housing 16, and can be advanced and retracted with respect to the yarn 9 by an advance / retreat mechanism (not shown).

  FIG. 11B shows a state in which the cutting head 3 has moved to the perforation position 7a where the thread penetrating needle 13 penetrates the sheet 9 through the sheet material 7, and both the housing 16 and the thread penetrating needle 13 are lowered. The bottom surface 16 a of the housing 16 presses the surface of the sheet material 7. The thread penetration needle 13 continues to descend and is pierced by the sheet material 7. The holding mechanism 12 releases the held yarn 9.

  FIG. 12 shows the state where the housing 16 is lifted from the surface of the sheet material 7 and the thread penetration needle 13 is raised until the tip end portion 13a is accommodated in the housing 16, and the slip prevention mechanism 24 and the advance / retreat mechanism 26 are threaded. 9 shows an operation of forming the drop prevention portion 24a. FIG. 12A shows a state in which the slip prevention mechanism 24 is separated from the thread 9 extending from the perforating position 7 a of the sheet material 7 to the leading end portion 13 a of the raised thread penetrating needle 13. FIG. 12B shows a state where the advancement / retraction mechanism 26 causes the removal prevention mechanism 24 to advance with respect to the yarn 9 and process the yarn 9 therebetween. 12C, the advancement / retraction mechanism 26 retracts the removal prevention mechanism 24 from the yarn 9, and the cutting mechanism 15 cuts the yarn 9 extending between the formed removal prevention portion 24a and the tip end portion 13a of the thread penetration needle 13. The state where the cut yarn 9 on the side of the thread penetrating needle 13 is held by the holding mechanism 12 is shown.

  If the material of the yarn 9 is a monofilament of thermoplastic resin or a twisted yarn of fiber, the yarn 9 is partially melted by heating with a heater, and the drop prevention portion 24a can be formed by deformation of the yarn 9 itself. Further, the drop prevention mechanism 24 can partially crush the yarn 9 to increase the diameter in at least one direction with a cross-sectional shape so that it does not fall below the sheet material 7 at the perforation position 7a.

  FIG. 13 shows an operation in which the slip prevention device 34 and the advance / retreat mechanism 36 of the sheet stitching device 30 according to the third embodiment of the present invention form a slip prevention portion 34 a on the yarn 9. FIG. 13A shows a state in which the slip prevention mechanism 34 is separated from the thread 9 extending from the perforating position 7 a of the sheet material 7 to the tip end portion 13 a of the raised thread penetrating needle 13. The omission prevention mechanism 34 of the present embodiment is a nozzle, and can discharge hot melt resin melted by heating from the tip. FIG. 13B shows a state in which the escape prevention mechanism 24 has advanced with respect to the yarn 9 by the advance / retreat mechanism 26 and the hot melt resin 35 is adhered to the yarn 9. FIG. 13C shows a thread 9 extending between a slipping prevention part 34 a formed by causing the advancement / retraction mechanism 36 to withdraw the slipping prevention mechanism 34 from the thread 9 and solidifying the resin 35, and the tip end part 13 a of the thread penetrating needle 13. Is cut by the cutting mechanism 15 and the cut yarn 9 on the side of the thread penetrating needle 13 is held by the holding mechanism 12.

  Even if the material of the thread 9 is not a thermoplastic resin monofilament or a twisted fiber, the slip prevention part 34a is formed by a process of attaching a material different from the thread 9, so the diameter of the part where the slip prevention part 34a is formed Is larger than the diameter of the yarn 9, and can be prevented from coming out below the sheet material 7 at the perforating position 7a. Since it is not necessary to process the yarn 9 directly, a material other than resin can be used as the yarn 9. Further, the resin 35 may be melted with a solvent, as long as it is solidified after adhering to the yarn 9.

  FIG. 14 shows an operation in which the slip prevention device 44 and the advance / retreat mechanism 46 of the sheet stitching device 40 according to the fourth embodiment of the present invention form the slip prevention portion 44 a on the yarn 9. FIG. 14A shows a state in which the removal prevention mechanism 44 is separated from the yarn 9 extending from the perforating position 7a of the sheet material 7 to the tip portion 13a of the raised thread penetrating needle 13. The drop prevention mechanism 44 of this embodiment can attach a seal 45 as a material different from that of the yarn 9 to the yarn 9. FIG. 14B shows a state in which the escape prevention mechanism 44 advances with respect to the yarn 9 by the advance / retreat mechanism 46 and the yarn 9 is sandwiched by the seal 45. 14 (c) shows that the thread 9 extending between the slip-off preventing part 44a formed by causing the advance / retreat mechanism 46 to retract the slip-off preventing mechanism 44 from the thread 9 and sticking the seal 45 and the tip 13a of the thread-penetrating needle 13 is used. A state in which the yarn 9 on the side of the thread penetration needle 13 cut by the cutting mechanism 15 is held by the holding mechanism 12 is shown. The seal 45 can be fixed to the thread 9 with an adhesive or an adhesive, and the surface can display part identification information or the like to have a function as a label.

  FIG. 15 shows an operation in which the slip prevention device 54 and the advance / retreat mechanism 56 of the sheet stitching device 50 according to the fifth embodiment of the present invention form a slip prevention portion 54 a on the yarn 9. FIG. 15A shows a state in which the removal prevention mechanism 54 is separated from the yarn 9 extending from the perforating position 7 a of the sheet material 7 to the tip portion 13 a of the raised thread penetrating needle 13. The drop prevention mechanism 54 of this embodiment has a function of sticking the yarn 9 to the surface of the sheet material 7 with the seal 55. FIG. 15B shows a state in which the removal prevention mechanism 54 is advanced by the advance / retreat mechanism 56 and the thread 9 is stuck to the surface of the sheet material 7 with the seal 55. The housing 16 is moved from FIG. 15A, and a part of the thread 9 extending from the perforating position 7 a to the tip part 13 a of the thread penetrating needle 13 is put on the surface of the sheet material 7. The seal 55 is used in order to stick the thread 9 of the twisted portion to the surface of the sheet material 7. FIG. 15C shows a state in which the escape prevention mechanism 54 is retracted from the yarn 9 by the advance / retreat mechanism 56 and the yarn 9 is adhered to the surface of the sheet material 7 by the seal 55 to form the escape prevention portion 54a.

  The thread 9 is cut by a cutting mechanism 15 in the housing 16 from the perforating position 7a to the tip 13a of the thread penetrating needle 13, and the thread 9 on the thread penetrating needle 13 side is held by the holding mechanism 12. To do. In the housing 16, the slip prevention part 54 a is not formed. Therefore, the position where the cutting mechanism 15 and the holding mechanism 12 are applied to the thread 9 is lower than the position shown in FIG. The length can be shortened. As with the seal 45, the seal 55 can also have a function as an identification label.

DESCRIPTION OF SYMBOLS 1 Cutting machine 2 Cutting table 3 Cutting head 7 Sheet material 9 Yarn 9a Marking thread 9c Knot 9g U-turn part 10, 20, 30, 40, 50 Sheet material thread setting device 11 Supply mechanism 12 Holding mechanism 13 Thread penetration needle 14, 24, 34, 44, 54 Removal prevention mechanism 14a, 24a, 34a, 44a, 54a Removal prevention part 15 Cutting mechanism 16 Housing 19 Yarn presser mechanism 26, 36, 46, 56 Advance / Retreat mechanism

Claims (9)

The perforations position preset in sheet material, a fine line beating device of the sheet material leaving by penetrating the thread,
A thread supply mechanism capable of supplying a thread;
A thread penetrating needle that is movable to the perforation position of the sheet material, pulled out from the sheet material once pierced into the perforation position, and feeds the yarn supplied from the thread supply mechanism from the tip portion to penetrate the perforation position of the sheet material;
A slip-off prevention mechanism capable of forming a slip-off prevention portion for the thread between the tip portion and the perforation position of the thread penetrating needle pulled out after piercing the perforation position of the sheet material,
A cutting mechanism that cuts the thread, in which the slip prevention part is formed by the slip prevention mechanism, between the slip prevention part and the tip of the thread penetrating needle;
A holding mechanism for holding the thread cut by the cutting mechanism on the tip side of the thread penetrating needle,
A threading device for sheet material, comprising: The drop prevention mechanism forms a knot on the yarn to form the drop prevention portion.
The sheet material threading device according to claim 1, wherein: Provided between the slip-off preventing mechanism and the sheet material, and when the slip-off preventing mechanism forms the slip-off preventing portion, the yarn is prevented from being supplied from the side penetrating the sheet material. Further including a presser foot holding mechanism,
3. A sheet material threading device according to claim 1, wherein the sheet material is threaded. An advancing / retreating mechanism for advancing and retracting the slip-off preventing mechanism to a position where a slip-off preventing portion can be formed with respect to the thread between the tip portion and the perforated position of the thread penetrating needle that has been pulled out after piercing the perforated position of the sheet material;
The sheet material threading device according to claim 1, further comprising: The sheet material threading device according to any one of claims 1 to 4 , which is provided on a cutting head of a cutting machine. The thread penetrating needle is a tube extending in the axial direction, and has a shaft portion through which a thread supplied from the thread supply mechanism is inserted into a hollow portion,
The tip is
Formed at the tip of the shaft,
A positive slope with a shape cut at an acute angle to the axis;
The back side of the positively inclined surface has a back inclined surface with a shape cut at an acute angle with respect to the axis from both sides so as to be tapered.
The yarn threading device for sheet material according to any one of claims 1 to 5 . A thread perforation method for a sheet material that is left by penetrating a thread at a preset perforation position in the sheet material,
Move the thread penetrating needle that feeds the yarn from the tip part to the perforation position, puncture the perforation position of the sheet material from the tip part side, and then pull out from the sheet material,
For the yarn between the tip of the thread penetrating needle pulled out from the perforated position and the perforated position, a drop prevention part is formed,
Cut the thread formed with the slip prevention part between the slip prevention part and the tip of the thread penetrating needle,
Leave the perforated position side of the cut thread as a mark thread on the surface of the sheet material,
A method for threading a sheet material. The cutting machine for cutting the sheet material has a cutting table having a transport function, and a comb is provided on the carry-out side of the cutting table,
The mark yarn is folded under the sheet material to form a U-turn portion, and when both ends of the mark yarn protrude above the sheet material, the drop prevention portion is formed only at one end.
The method for threading a sheet material according to claim 7 . Cutting that performs operations including cutting a sheet material sucked and held on the cutting table from below by a cutting blade provided on a cutting head that moves along the surface of the cutting table according to preset cutting data. In the machine
The cutting head is provided with a thread penetrating needle that pierces from above the sheet material and penetrates the thread used for marking in a post-process after cutting up and down the sheet material,
A marking thread adding method using a cutting machine, wherein a mark threading needle penetrates a sheet material with a threading needle, and a slip prevention portion is formed in a portion above the sheet material.

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