JP6045342B2 - Sheet material threading device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a sheet material threading device for leaving a thread for threading or the like through a sheet material or the like cut into parts in a cutting process. 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, in the cutting process, sheet materials such as cloth are cut one by one or in a state where a plurality of sheets are laminated as parts for sewing clothing. For parts, for example, a perforation position is set for positioning at the time of sewing in a subsequent process of the cutting process, and notch cutting or perforation with a perforation drill may be performed. There has also been proposed a marking device that colors a perforated position in a cutting process (see, for example, Patent Document 1). In this marking apparatus, a thread to which a dye is attached in advance is prepared, a needle is pierced and inserted, and the sheet material can be colored with the dye by the thread. A sewing mark applicator has also been proposed for making a mark for passing a thread through a sheet material and marking the thread itself as a mark, or for manually coloring with a chaco or the like. (For example, refer to Patent Document 2).

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

  If a notch is formed or perforated at the perforated position, the sheet material may be damaged even if it is partial. The marking device as shown in Patent Document 1 does not have the possibility of damaging the sheet material. If it is colored with a dye, it becomes a clear mark at the time of sewing. It is presumed that it can be easily removed from each leaf. 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, in order to leave the thread through the sheet material, it is necessary to reliably pierce the sheet material with a needle that allows the thread to penetrate the sheet material. If a hard material such as a clogged fabric material or a thick sheet material has a high resistance during piercing, the needle may not be able to penetrate or the needle may be damaged. When the rigidity is increased by increasing the needle diameter, the needle is less likely to be damaged. However, when the needle diameter is increased, the diameter of the hole formed in the sheet material also increases, and it becomes difficult to pass through the fibers such as the fabric, and the fibers may be cut and the sheet material may be damaged.

  An object of the present invention is to provide a sheet material threading device capable of stably passing a thread through a sheet material without increasing the needle diameter.

According to the present invention, in a state in which the sheet material is placed on the table , the sheet material is moved to a preset perforation position by the movement above the sheet material along the surface of the table, and the thread is penetrated and left. A sheet material threading device,
A thread supply mechanism capable of supplying a thread;
A thread penetrating needle that feeds the thread supplied from the thread supply mechanism through the leading end portion and penetrates to the perforating position of the sheet material by puncturing that is once pierced at the perforating position on the leading end side and then pulled out from the sheet material;
A pilot hole needle capable of forming a pilot hole at the perforated position of the sheet material prior to the thread penetrating needle ,
After the thread penetrates the sheet material with the thread penetrating needle, a slip prevention mechanism that forms a slip prevention part on the thread and cuts it above the sheet material ,
It is the thread | yarn threading device of the sheet | seat material characterized by including.

In the present invention, the prepared needle is
On the distal end side, the needle is a solid needle having a tapered portion that decreases in diameter and forms a tip on the central axis.
It is characterized by that.

In the present invention, the needle diameter of the prepared hole needle is equal to or smaller than the needle diameter of the thread penetration needle.
It is characterized by that.

In the present invention, the thread penetrating needle is
It has a tubular shaft portion whose axial direction is the direction of the stab and draw,
Insert the thread supplied from the thread supply mechanism into the hollow part of the shaft part,
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.

According to the present invention, the yarn supplied from the yarn supply mechanism can be left at the perforated position of the sheet material by piercing and pulling the tip of the yarn penetrating needle. Prior to the puncturing of the thread penetrating needle, a pilot hole is formed with a pilot hole needle at the perforated position of the sheet material. Since the pilot hole is formed in advance, it is possible to stably pass the thread through the sheet material without increasing the diameter of the thread penetrating needle.
Since the slip prevention mechanism forms a slip prevention portion in the yarn above the sheet material, it is possible to prevent the yarn from slipping downward from the sheet material.

  Further, according to the present invention, the tip side of the lower hole needle has a pointed tip on the center line and has a tapered portion whose diameter decreases to the pointed tip, so if the tip is moved to the perforated position of the sheet material, A pilot hole can be formed at the perforated position. Since the lower hole needle is solid, it is difficult to bend even if the needle diameter is small, and it is possible to reliably form a small diameter pilot hole that spreads the eyes of the fabric without making a hole in the sheet material.

  In addition, according to the present invention, the needle diameter of the lower hole needle is equal to or smaller than the needle diameter of the thread penetration needle. The diameter of the hole formed in the sheet material can be prevented from becoming excessive.

  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. .

FIG. 1 is a side sectional view showing a schematic configuration of a cutting machine 1 including a sheet material threading device 10 according to an embodiment of the present invention. FIG. 2 is a side sectional view showing a procedure for using the thread penetration needle 13 of FIG. 1 together with the pilot hole needle 15. 3 is a front view, a side view, and a perspective view showing the shape of the tip 13a of the thread penetration needle 13 of FIG.

  1 to 3 show the configuration and operation of a sheet material threading device 10 provided in the cutting machine 1 as an embodiment of the present invention. For convenience of explanation, 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 provided in a cutting machine 1 as 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 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 above the sheet material 7 along the surface of the cutting table 2. The cutting machine 1 performs an operation of a cutting process 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, a sealing sheet 8 made of a non-breathable synthetic resin film is placed over the sheet material 7, and the sheet material 7 is cut 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.

  The sheet material threading device 10 is provided with a thread supply mechanism 11 capable of supplying a thread 9 for marking in a subsequent process of the cutting process. In the yarn supply mechanism 11, the yarn package 11a can be set and the yarn 9 can be supplied through the yarn guide 11b. The cutting head 3 is provided with a thread penetrating needle 13, a drop prevention mechanism 14, and a pilot hole needle 15 in a state of being accommodated in a housing 16.

  The thread penetration needle 13 and the pilot hole needle 15 can be provided separately without being accommodated in the same housing 16. For example, if the cutting head 3 is provided with a punching device, it can be used as the pilot hole needle 15. For convenience of explanation, in this embodiment, it is assumed that the thread penetration needle 13 and the pilot hole needle 15 are accommodated in the same housing 16.

  The bottom surface 16a of the housing 16 is provided with a penetrating needle hole 16b for projecting and retracting the tip 13a of the thread penetrating needle 13 and a lower hole needle hole 16c for projecting and retracting the prepared hole needle 15. The yarn penetrating needle 13 is hollow, and the yarn 9 supplied from the yarn supply mechanism 11 can be accommodated in the hollow portion, and the yarn 9 can be fed out from the tip portion 13a. If the tip end portion 13a of the thread penetrating needle 13 protrudes downward from the penetrating needle hole 16b and is pierced and pulled out from above the sheet material 7, the thread 9 can be penetrated up and down the sheet material 7.

  The slip prevention mechanism 14 allows the thread 9 to penetrate the sheet material 7 with the thread penetrating needle 13, and then cuts the thread 9 by forming a knot as a slip prevention portion 14 a 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 sheet material 7 side of the cut yarn 9 comes out of the penetrating needle hole 16b, and the mark yarn 9a 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. Further, even when the sheet material 7 is moved by the conveying function of the cutting table 2 on which the sheet material 7 is placed, even if the mark yarn 9a coming out below the sheet material 7 is rubbed and pulled, the drop prevention unit 14a resists, so that the whole mark yarn 9a cannot be removed. 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.

  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. Since the thread punching device 10 includes the pilot hole needle 15, the pilot hole is formed by the pilot hole needle 15 prior to the puncture by the thread penetrating needle 13. Since the pilot hole is formed in advance, it is easy to puncture the thread penetrating needle 13 to the perforating position 7a. There is no need to reinforce the thread penetrating needle 13 by increasing the needle diameter, as in the case where the thread penetrating needle 13 is directly inserted into the sheet material 7 without forming a pilot hole. If the lower hole is formed, it is possible to prevent the diameter of the hole formed by puncturing the thread penetrating needle 13 from being excessive with respect to the thread 9. If the needle diameter of the thread penetrating needle 13 does not become excessive with respect to the thread 9, it is possible to leave the thread 9 in a state of receiving an appropriate resistance so that it is difficult to come off.

  FIG. 2 shows a procedure for using the thread penetration needle 13 of FIG. The sheet material 7 is placed on the surface 2a of the cutting table 2 of FIG. 1 and is covered with a sealing sheet 8 in order to be sucked and held from below, but these illustrations are omitted for simplicity. To do. When piercing the lower hole needle 15 and the thread penetrating needle 13 into the sheet material 7, the housing 16 is lowered from the upper side of the sheet material 7 to the surface, and the surface of the sheet material 7 is pressed by the bottom surface 16a. The lower hole needle 15 is protruded from the through needle hole 16b and the lower hole needle hole 16c, respectively.

  First, as the cutting head 3 moves, the lower hole needle 15 is moved to the perforating position 7a of the sheet material 7 as shown in FIG. The lower hole needle 15 is provided with a tapered portion 15a at the tip, and the proximal end side of the tapered portion 15a continues to the straight portion 15b. That is, the taper portion 15a is the tip side of the prepared hole needle 15, and the diameter is reduced to form a point 15d on the central axis 15c. The straight portion 15b continues to the base end side of the tapered portion 15a to at least a range where there is a possibility of piercing the sheet material 7, and has a constant diameter. Although the taper part and the stepped part having a larger diameter may be provided following the straight part 15b, the needle diameter of the lower hole needle 15 related to the formation of the lower hole is the diameter of the straight part 15b. Since the lower hole needle 15 is a solid needle, it is difficult to bend even if the needle diameter is small, the center axis 15c is aligned with the perforated position 7a, and the sheet material 7 is not perforated, and the fabric eye is pressed. A pilot hole with a small diameter that can be expanded can be formed reliably.

  Next, as shown in FIG. 2 (b), the tip 15 d of the lower hole needle 15 protrudes downward from the lower hole needle hole 16 c and pierces the perforated position 7 a of the sheet material 7. The distal end side of the lower hole needle 15 protrudes below the sheet material 7 from the tapered portion 15a to a part of the straight portion 15b.

  Next, as shown in FIG. 2C, the lower hole 7 b is formed in the sheet material 7 by pulling out the lower hole needle 15 from the sheet material 7. If the sheet material 7 is a fabric, the lower hole needle 15 passes through a gap that elastically expands between the fibers, and when pulled out, the gap returns to form a lower hole 7b having a smaller diameter than the diameter of the straight portion 15b. The

  Next, as shown in FIG. 2D, the thread penetration needle 13 is moved to the position of the lower hole 7b. The thread penetration needle 13 is a hollow needle, and can feed the thread 9 supplied through the hollow shaft portion 13b from the distal end portion 13a. The yarn 9 is supplied from the yarn supply mechanism 11 to the shaft portion 13b.

  Next, as shown in FIG. 2 (e), the thread penetrating needle 13 is protruded from the penetrating needle hole 16b and pierced into the lower hole 7b. The tip end portion 13 a of the thread penetration needle 13 and the tip end of the yarn 9 fed out from the tip end portion 13 a protrude below the sheet material 7.

  Next, as shown in FIG. 2 (f), if the thread penetrating needle 13 is pulled out of the sheet material 7, the thread 9 remains at the perforating position 7 a of the sheet material 7, and the thread 9 that has penetrated is perforated. It will also be in the state which continues between the position 7a and the front-end | tip part 13a. The lower hole 7b in FIG. 2 (d) becomes a thread hole 7c through which the thread 9 passes.

  The diameter of the straight portion 15 b of the lower hole needle 15, that is, the needle diameter of the lower hole needle 15, is preferably smaller than the diameter of the shaft portion 13 b of the thread penetration needle 13, that is, the needle diameter of the thread penetration needle 13. Since the diameter of the lower hole 7b shown in FIG. 2C is smaller than the diameter of the straight portion 15b, it is set to be equal to or smaller than the diameter of the shaft portion 13b of the thread penetrating needle 13 pierced in FIG. The diameter of the thread 9 inserted through the hollow portion in the shaft portion 13b is also smaller than the diameter of the shaft portion 13b. By penetrating and pulling the thread penetrating needle 13, the diameter of the thread hole 7 c is not excessively large with respect to the thread 9 even if the thread hole 7 c shown in FIG. 2 (f) is larger in diameter than the lower hole 7 b. can do. If the diameter of the thread hole 7 c is excessive with respect to the thread 9, the resistance when the thread 9 is pulled upward or downward is reduced, and the thread 9 may come off the sheet material 7.

  In addition, the lower hole 7b does not need to penetrate the sheet | seat material 7, and may just be formed to the middle of thickness. By forming the lower hole 7b even in the middle of the thickness, even if the hollow thread penetrating needle 13 having a small needle diameter is punctured to the perforating position 7a, it is difficult to be damaged. By forming the lower hole 7b, even if the diameter and thickness of the shaft portion 13b of the thread penetrating needle 13 are reduced, the sheet material 7 is reliably damaged without being damaged from a cloth having a large resistance. The thread 9 can be passed through.

  FIG. 3 shows an example of the shape of the tip portion 13 a of the thread penetration needle 13. 3A shows a shape partially viewed from the front, and FIG. 3B shows a shape when FIG. 3A is viewed from the right side. 3 (c) and 3 (d) show shapes of FIG. 3 (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 tip end portion 13a can put the most apex end 13g inside the outer peripheral line of the shaft portion 13b in the radial direction. 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 end portion of the yarn 9 that is fed from the shaft 13b through the opening 13h inside the forward inclined surface 13d passes through the sheet material 7, the tip is folded back upward, and the proximal end portion 13i of the opening 13h. Easy to pass. 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.

  Further, since the thread 9 is inserted through the hollow shaft portion 13b, the thread 9 accommodated in the shaft portion 13b is prevented from coming into contact with the sheet material 7 when the thread penetrating needle 13 is inserted into the sheet material 7. it can. Even when the sheet material 7 is sucked and held by the cutter 1, the suction force also acts on the hollow shaft portion 13b, and when the thread penetrating needle 13 is pierced into the sheet material 7 and then lifted, It is possible to prevent the yarn 9 from coming up.

  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 is not only inserted from the proximal end of the shaft portion 13b to the distal end portion 13a as in this embodiment, but also from the middle of the shaft portion 13b to the distal end portion 13a. You may make it insert.

It should be noted that the drop prevention part 14a may be configured so that the thread 9 is difficult to penetrate the sheet material 7. Therefore, in addition to forming a knot, it may be tied to other yarns with a knotter, or connected to other yarns with a splicer that loosens and entangles the ends of the yarns. 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 .

  In this embodiment, the laminated sheet material 7 is placed on the cutting table 2 of the cutting machine 1, and the sheet material threading device 10 moves along the surface of the cutting table 2 to thread 9 on the sheet material. Is left behind. Although the sheet material threading device 10 moves in the XY two-dimensional direction together with the cutting head 3 of the cutting machine 1, it may be moved independently of the cutting head 3. If the sheet head threading device 10 can be moved independently of the cutting head 3, the sheet material threading device 10 is provided, for example, on the carry-in path of the sheet material 7 to the cutting table 2, or on the spreading table where the sheet material 7 is expanded and stacked. You can also. If the sheet material threading device 10 is combined with the conveyance of the sheet material 7, the sheet material threading device 10 can also perform a two-dimensional movement with respect to the surface of the sheet material 7 by a one-dimensional movement in a direction perpendicular to the conveyance direction.

  Although the main part of the sheet material threading device 10 is accommodated in the housing 16, a part or the whole of the material 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.

DESCRIPTION OF SYMBOLS 1 Cutting machine 2 Cutting table 3 Cutting head 7 Sheet material 7a Perforation position 7b Lower hole 9 Yarn 9a Marking thread 10 Sheet material thread percussion device 11 Supply mechanism 13 Thread penetration needle 14 Detachment prevention mechanism 14a Detach prevention part 15 Lower hole Needle 15a Taper portion 15b Straight portion 15c Center axis 15d Point 16 Housing

Claims (4)

In a state in which the sheet material is placed on the table, the movement of the sheet material upwardly along the surface of the table, to move the perforations position preset in sheet material, weaving of the sheet material leaving by penetrating the thread A striking device,
A thread supply mechanism capable of supplying a thread;
A thread penetrating needle that feeds the thread supplied from the thread supply mechanism through the leading end portion and penetrates to the perforating position of the sheet material by puncturing that is once pierced at the perforating position on the leading end side and then pulled out from the sheet material;
A pilot hole needle capable of forming a pilot hole at the perforated position of the sheet material prior to the thread penetrating needle ,
After the thread penetrates the sheet material with the thread penetrating needle, a slip prevention mechanism that forms a slip prevention part on the thread and cuts it above the sheet material ,
A threading device for sheet material, comprising: The pilot hole needle is
On the distal end side, the needle is a solid needle having a tapered portion that decreases in diameter and forms a tip on the central axis.
The sheet material threading device according to claim 1, wherein: The needle diameter of the lower hole needle is equal to or smaller than the needle diameter of the thread penetration needle.
3. A sheet material threading device according to claim 1, wherein the sheet material is threaded. The thread penetrating needle is
It has a tubular shaft portion whose axial direction is the direction of the stab and draw,
Insert the thread supplied from the thread supply mechanism into the hollow part of the shaft part,
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 a sheet material according to any one of claims 1 to 3, wherein

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