JP2009213645A - Sequin tape feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize the operation of a feed mechanism by preventing loosening of a tape between a reel and the feed mechanism in a sequin tape feeder having the lifting/lowering feed mechanism. <P>SOLUTION: The reel 13 is installed on a sewing machine head 3, and the tape T is guided from the reel 13 to the feed mechanism 21 along a guide passage by a plurality of rollers 51. The feed mechanism 21 is lifted/lowered by a motor via a screw shaft 16 and the tape T is fed from the feed mechanism 21 in a descent position to a sewing position. The middle-step roller 51B is provided in a vertical home position with respect to the reel 13 and the lower-step roller 51C is supported onto the feed mechanism 21. The roller 51B is located at a vertex of an isosceles triangle E whose base is defined as a straight line connecting an ascent point UP to a descent point DP of the roller 51C and, when the feed mechanism 21 is lifted/lowered, bends the guide passage while retaining its fixed length. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sequin tape supply device for supplying a tape having a series of sequins to a sewing position of a sewing machine.

2. Description of the Related Art Conventionally, a sequin tape supply device is known in which a tape feeding mechanism is provided so as to be movable up and down with respect to a sewing machine head. For example, in Patent Document 1, a slide cover is attached to a sewing head so that the slide cover can be moved up and down, a reel is supported at the upper end of the slide cover, a feed mechanism is installed at the lower end of the slide cover, and the slide cover is moved up and down by an air cylinder. An apparatus is described in which the tape is fed to the sewing position by inserting the pin of the tape delivery member into the sequin hole at the lowered position of the mechanism.
JP 2005-334243 A

  According to the conventional apparatus, when the sequin sewing is not performed, the periphery of the sewing position can be widely opened by retracting the feed mechanism upward. However, since the reel for storing the tape moves up and down together with the feeding mechanism, the tape is easily loosened on the reel due to an impact at the time of lifting. For this reason, there has been a problem that the operation of the feeding mechanism becomes unstable, for example, the tape is loosened between the reel and the feeding mechanism, and the pin of the tape delivery member is detached from the sequin hole due to the loosening.

  An object of the present invention is to solve the above-mentioned problems, to provide a sequin tape supply device that can prevent tape slack between the reel and the feed mechanism and stabilize the operation of the feed mechanism.

  In order to solve the above-mentioned problems, the sequin tape supply device of the present invention guides a tape having sequins connected to a feed mechanism along a guide path from a reel, and the feed mechanism is provided so as to be movable up and down with respect to the sewing machine head. The tape is fed from the feed mechanism to the sewing position, the reel is installed at a fixed position in the vertical direction with respect to the sewing head, and the guide path is set to a substantially constant length between the feed mechanism and the reel as the feed mechanism moves up and down. A tape guide mechanism that is changed while keeping the thickness is provided.

The present invention also provides the following sequin tape supply device.
(A) The tape guide mechanism includes a fixed guide member provided at a fixed position in the vertical direction with respect to the reel, and a movable guide member that moves up and down together with the feed mechanism, and the fixed guide member rises and lowers the movable guide member. A sequin tape supply device provided at an approximately vertex of an isosceles triangle having a base connecting a straight line connecting points.
(B) A sequin tape supply device in which a torque limiter is provided on the reel.
(C) A sequin tape supply device that moves the feed mechanism up and down via a screw shaft by a motor.

  According to the sequin tape supply device of the present invention, since the reel is separated from the feed mechanism and installed at a fixed position with respect to the sewing machine head, the tape is less likely to loosen on the reel when the feed mechanism is raised and lowered. Also, when the feed mechanism moves up and down, the tape guide mechanism changes the guide path on the downstream side of the reel while maintaining a certain length, so that the tape is not loosened between the reel and the feed mechanism, and the feed mechanism operates. It has an excellent effect that can be stabilized.

  This sequin tape supply device (11) guides the tape (T) with the sequin (S) connected from the reel (13) to the feed mechanism (21) along the guide path (P), and the feed mechanism is connected to the sewing head ( 3) It can be moved up and down freely, the tape is supplied from the feed mechanism at the lowered position to the sewing position (9a), the reel is installed at a fixed position in the vertical direction with respect to the sewing machine head, and between the feed mechanism and the reel A tape guide mechanism (14) is provided for changing the guide path while maintaining a substantially constant length as the feed mechanism is raised and lowered, and the fixed guide member (51B) provided at a fixed position in the vertical direction with respect to the reel. ) And a movable guide member (51C) that moves up and down together with the feed mechanism, and the fixed guide member is provided at a substantially vertex of an isosceles triangle having a base that is a straight line connecting a descending point and an ascending point of the movable guide member. Special that To.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a machine head 2 of a multi-head embroidery sewing machine 1 has a plurality of sewing heads 3 arranged in parallel, and a sequin tape supply device 11 is installed on the left side of each head 3. A bed 4 is disposed below the sewing head 3, and an embroidery frame (not shown) that holds a work cloth is placed on a table 5 having the same height as the bed 4. A controller 6 is installed at one end of the table 5, and the entire embroidery machine 1 is controlled by the controller 6. Two sequin tape supply devices 11 may be installed on each of the left and right sides of each sewing head 3.

  As shown in FIGS. 2 and 3, the frame 12 of the sequin tape supply device 11 is fixed to the left side surface of the sewing head 3. On the right side of the frame 12, two left and right reels 13 for storing the tape T (T 1, T 2) and a tape guide mechanism 14 are installed. The guide mechanism 14 separates the two tapes T from the reel 13 to the feed mechanism 21. A guide passage P (P1, P2) having a predetermined length is formed. On the left side of the frame 12, a slide shaft 15 and a screw shaft 16 are provided so as to extend obliquely in parallel up and down, and an elevating body 17 is supported on both the shafts 15 and 16. A stepping motor 18 that rotates the screw shaft 16 is installed on the upper portion of the frame 12, and the elevating body 17 is driven by the rotation of the screw shaft 16.

  A base 20 is attached to the lifting body 17 and is lifted and lowered by a stepping motor 18. The base 20 includes two left and right feeding mechanisms 21 (21L, 21R) that feed the tape T in the front-rear direction, a switching mechanism 22 that moves the feeding mechanism 21 in the left-right direction with respect to the sewing machine head 3, and one needle bar. 7 and a drive mechanism 23 for supplying power to the feed mechanism 21 opposite to the feed mechanism 21. Then, as the base 20 moves up and down, the feeding mechanism 21 is disposed at a lowered position (see FIG. 3) where the feeding mechanism 21 approaches the needle plate 9 and an elevated position (see FIG. 4) away from the needle plate 9. In this embodiment, a plurality of needle bars are arranged on the left and right sides of the sewing head 3, and the left end needle bar 7 is aligned with the needle hole 9a of the needle plate 9 (sewing) by a color changing mechanism (not shown). Position).

  As shown in FIGS. 5 and 6, the body 25 of the feeding mechanism 21 is supported on the base 20 by a plurality of rods 26 so as to be movable left and right, and a tape feeding groove 27, a tape feeding member 28, and a slider 29 are formed below the body 25. A cutter 30 is provided. A switching motor 32 of the switching mechanism 22 is connected to the body 25 via a lever 33 and a link 34, and a feed motor 35 of the driving mechanism 23 is connected to an output lever 38 via a lever 36 and a link 37. The input lever 41 of the feed mechanism 21 is connected to the slider 29 via a link 42, a lever 43, and a link 44. As the body 25 moves, the pins 45 of the input lever 41 are alternately connected to the long holes 39 of the output lever 38, and the tape delivery member 28 at a position facing the needle bar 7 is driven by the motor 35.

  Next, the configuration of the reel 13 and the tape guide mechanism 14 will be described. As shown in FIGS. 2 and 3, the two reels 13 are supported at the upper end of the frame 12 and are installed at fixed positions in the vertical and horizontal directions with respect to the sewing machine head 3. The support shaft 47 of the reel 13 is attached to the frame 12 via a mounting plate 48 so that the height thereof can be adjusted, and a torque limiter 49 for preventing the reel 13 from idling is provided coaxially with the support shaft 47. The tape guide mechanism 14 includes a plurality of rollers 51 that guide the two tapes T1 and T2 along the guide paths P1 and P2. In the tape guide mechanism 14 of this embodiment, the two left and right rollers 51 are arranged at the same height and arranged in four stages at different heights in the vertical direction. However, the arrangement of the rollers 51 is not limited to the illustrated example, and for example, the left and right rollers 51 can be arranged in steps.

  The upper two sets of rollers 51A close to the reel 13 are swingably supported by the frame 12 by the arm 52 so that they can be displaced vertically according to the remaining amount of tape on the reel 13. The middle roller 51 </ b> B near the feed mechanism 21 is supported by the frame 12 by a roller shaft 53 and is disposed at a fixed position in the vertical direction with respect to the reel 13. The lower roller 51 </ b> C closest to the feed mechanism 21 is supported by the base 20 via the bracket 55 by the roller shaft 53, and moves up and down integrally with the feed mechanism 21. A guide rod 56 that introduces the tape T into the tape feed groove 27 of the feed mechanism 21 is disposed downstream of the roller 51 </ b> C, and is held horizontally on the base 20 by a plate 57.

  As shown in FIGS. 7 and 8, the lower roller shaft 53 is horizontally held by the bracket 55 so as to cross the guide paths P <b> 1 and P <b> 2. The two left and right rollers 51C are slidably supported on the roller shaft 53, and move in the same direction following the lateral tension of the tape T acting on the flange 51a. A pair of left and right locking rings 59 that determine the moving range of the roller 51C are fixed to the roller shaft 53, and a spring 60 that biases the roller 51C to the right is mounted. The middle roller 51B (see FIG. 2) is slidably supported on the roller shaft 53 and urged rightward by a spring 60, like the lower roller 51C.

  In the tape feeding mechanism 14 of this embodiment, as shown in FIGS. 2 and 7, when the left feeding mechanism 21L is opposed to the needle bar 7, the left guide passage P1 is vertical and the right guide passage P2 is. The reel 13 and the roller 51 are arranged so that is slightly inclined right from the vertical. In this state, the left tape T1 is introduced into the feed groove 27 along the vertical guide path P1 without contacting the flanges 51a of the middle and lower rollers 51B and 51C. At this time, the right tape T2 comes into contact with the flange portion 51a, but the power of the feed motor 35 is not acting, so that the rollers 51B and 51C are in contact with the right locking ring 59 by the urging force of the spring 60. Rotate.

  As shown in FIG. 8, when the right feeding mechanism 21R is made to be opposed to the needle bar 7, the power of the feeding motor 35 acts on the right tape T2, and the tape T2 comes into contact with the flange 51a, so that at least the lower roller 51C follows the leftward tension F by the tape T2 and moves to the left against the rightward biasing force by the spring 60. The amount of movement of the roller 51C is determined by the difference between the tension F of the tape T2 and the urging force of the spring 60. For example, in the case of the tape T2 with a large-diameter sequin S, the lower roller 51C has a maximum distance D. The middle roller 51B moves a maximum distance or less by moving to contact with the left locking ring 59.

  Therefore, in this embodiment, when the tape T2 is supplied from the right feeding mechanism 21R, the friction resistance between the tape T2 and the rollers 51B and 51C is reduced, and the tape T2 is fed from the reel 13 to the feeding groove 27 of the feeding mechanism 21R. Thus, the operation of the tape delivery member 28 can be stabilized. Further, since the spring 60 urges the rollers 51B and 51C in the direction opposite to the tension F, even when a large tension F acts on the rollers 51B and 51C, the tape T2 can be smoothly guided without dropping off. Contrary to the illustrated example, in the case of a roller arrangement in which the right guide path P2 is vertical, a spring 60 is provided on the right side of the rollers 51B and 51C to apply a leftward biasing force against the rightward tension. Configuration can be adopted.

  On the other hand, when the two feed mechanisms 21 are arranged at the raised position without performing sequin sewing, the downstream side portions of the two tapes T together with the feed mechanism 21 are aligned with the needle plate 9 as shown in FIG. Retreat above. At this time, the middle roller 51B, which is a fixed guide member, maintains a fixed position in the vertical direction with respect to the reel 13, and the lower roller 51C, which is a movable guide member, moves together with the feed mechanism 21 from the descending point DP to the ascending point UP. To do. In the tape feeding mechanism 14 of this embodiment, the middle roller 51B is provided at the apex of the isosceles triangle E having a base connecting the rising point UP and the lowering point DP of the lower roller 51C. The guide passage P is bent while maintaining a certain length as it goes up and down. For this reason, the slack of the tape T between the reel 13 and the feeding mechanism 21 is prevented, and in particular, the pin 31 (see FIG. 6) of the tape feeding member 28 is reliably inserted into the hole h of the sequin S when feeding is started. The tape T can be supplied without error.

  Further, in the supply device 11 of this embodiment, since the reel 13 is installed at a fixed position with respect to the sewing machine head 3, the reel 13 is prevented from shaking both when the feed mechanism 21 is moved up and down and when the left and right are switched. The The torque limiter 49 suppresses the idle rotation of the reel 13, applies an appropriate tension to the tape T during supply, and prevents the tape T from loosening due to the vibration of the sewing machine 1 during rest. The stepping motor 18 lifts and lowers the two feeding mechanisms 21 and the two motors 32 and 35 smoothly via the screw shaft 16 and gently stops the entire unit having a large mass. Therefore, in the twin supply device 11, the two tapes T can be supplied in a stable state. Note that the stepping motor 18 has an advantage that all the sewing heads 3 can adjust the lifting speed, stroke, and intermediate stop position of the feeding mechanism 21 simultaneously by electrical control.

The present invention is not limited to the above-described embodiments, and can be implemented by arbitrarily changing the configuration of each part without departing from the spirit of the invention, as exemplified below.
(1) In the tape guide mechanism 14 shown in FIG. 2, the springs 60 are provided on both the left and right sides of the rollers 51B and 51C to apply a rightward biasing force against the leftward tension, and to the leftward against the rightward tension. Configure to exert power.
(2) In the tape guide mechanism 14 shown in FIG. 4, the lower roller 51C is provided at the tip of the arm, the base end of the arm is supported by the middle roller shaft 53, and the arm swings up and down together with the feed mechanism 21. Then, the lower roller 51C is moved up and down along the arc.

1 is a front view of a multi-head sewing machine showing an embodiment of the present invention. It is a front view which shows the sequin tape supply apparatus of this sewing machine. It is a right view which shows this supply apparatus. It is a right view which shows the dormant state of this supply apparatus. It is sectional drawing which shows the feed mechanism of this supply apparatus. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is a partial front view of the supply apparatus which shows the principal part of a tape guide mechanism. It is a partial front view of the supply apparatus which shows operation | movement of a tape guide mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Multi-head embroidery sewing machine 3 Sewing head 7 Needle bar 11 Sequin tape supply device 13 Reel 14 Tape guide mechanism 21 Feed mechanism 22 Switching mechanism 23 Drive mechanism 51 Roller 53 Roller shaft 60 Spring P Guide path S Sequin T Tape

Claims (4)

In a sequin tape supply device that guides a tape with a series of sequins from a reel to a feed mechanism along a guide path, provides the feed mechanism so as to be movable up and down relative to the sewing head, and feeds the tape from the lowered position feed mechanism to the sewing position. ,
A tape guide mechanism in which the reel is installed at a fixed position in a vertical direction with respect to a sewing head, and the guide path is changed between the feed mechanism and the reel while maintaining the guide path at a substantially constant length as the feed mechanism is raised and lowered; A sequin tape supply device provided.   The tape guide mechanism includes a fixed guide member provided at a fixed position in the vertical direction with respect to the reel, and a movable guide member that moves up and down together with the feed mechanism, and the fixed guide member has a lowering point and an ascending point of the movable guide member. The sequin tape supply device according to claim 1, wherein the sequin tape supply device is provided at a substantially apex of an isosceles triangle having a base connecting a straight line connecting the two.   The sequin tape supply apparatus according to claim 1, wherein a torque limiter is provided on the reel.   The sequin tape supply device according to any one of claims 1 to 3, wherein the feed mechanism is moved up and down by a motor via a screw shaft.

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