JP2007222188A - Sequin feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sequin feeder permitting sewing of a sequin connected body composed of micro sequins. <P>SOLUTION: The sequin connected bodies 60, fed out of a reel and mounted on the upper surface of a support plate 8, are fed at prescribed pitch corresponding to the size of one sequin S'. When a needle bar 31 is lowered by the sewing operation, a needle 41 is inserted into the sequin S' at the end, and after that, a movable blade 27 abuts on the needle bar 31 or a member 32 in association with the needle bar 31. Then, the movable blade is energized downward, and the sequin S' at the end is cut. A part 27a in the movable blade 27 corresponding to a needle falling position is thinned, and when the movable blade 27 is in a position prior to abutment on the needle bar 31 or the member 32 associated with the needle bar 31, the movable blade is formed in such a shape that the upper part u of the thinned part 27a of the movable blade is lower than the uppermost part T of the part 27b, which is not thinned, of the movable blade. Accordingly, the strength of the movable blade 27 is secured. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sequin feeding device in a sewing machine that sews sequins to a sewing object while cutting sequins from a sequin coupling body, and more particularly, a sequin coupling that can be applied to a sequin coupling body composed of extremely small sequins. The present invention relates to a feeding device.

As conventional sequin feeders, for example, those shown in Patent Document 1 or Patent Document 2 or 3 below are known. Such a sequin feeding device is configured to feed out the sequin coupling body from a reel in which a sequin coupling body formed by connecting a large number of sequins (sequins) is wound and placed on the upper surface of the support plate. Equipped with a feed mechanism that feeds the sequined linked body at a predetermined pitch corresponding to the size of one sequin by reverse movement, cutting one sequin from the sequined linked body fed in conjunction with the sewing operation of the needle bar of the sewing machine However, sequins are sewn on the body to be sewn.
German utility model registration No. G9209764.2 U.S. Pat.No. 5,755,168 German Patent No. DE19538084 (corresponding to Patent Document 2)

  The feed lever engages the center hole of the sequin and advances the feed lever to feed the sequin coupling body, and retracts the feed lever to engage the tip of the feed lever with the center hole of another subsequent sequin. The support plate is provided with a slit that allows the leading end of the feeding lever to bite in order to ensure the engagement between the leading end of the feeding lever and the center hole of the sequin. The sequin is cut by a movable blade that is rotatably arranged at the end of the support plate and a fixed blade that is fixed to the end of the support plate. The needle bar is lowered by the sewing operation of the needle bar, and after the sewing needle is inserted into the center hole of the fed sequin, the needle clamp provided at the lower end of the needle bar is pressed against the movable blade to move it. Is rotated and the sequin is cut.

  FIG. 12 is a schematic view of a conventional sequin feeder, in which (a) is a side view and (b) is a plan view. 100 is a support plate, 100a is a slit, 100b is a fixed blade, 101 is a feed lever, 102 is a movable blade, 103 is a needle bar, 104 is a sewing needle, 105 is a needle clamp, 106 is a sequin coupling body, S is a sequin, 106a Is the center hole of sequin S, and S1 is the junction of sequin S. With this conventional sequin feeder, it is impossible to sew sequins of a minimum (for example, 3 mm in diameter). FIG. 12 shows a case where a minimum sequin having a diameter of 3 mm is to be sewn, and the reason why the minimum sequin cannot be sewn will be described below.

  As shown in FIG. 12 (b), the sequin S is sent out so that the joint S1 between the top of the sequin coupling body 106 and the second sequin S is located at the cutting edge of the fixed blade 100b. The sewing needle 104 is inserted into the center hole 106a of the sequin S. Therefore, in the case of a sequin having a diameter of 3 mm, the distance from the cutting edge of the fixed blade 100b shown by A in FIG. 12A to the needle drop position of the sewing needle 104 is 1.5 mm, which is shown in FIG. If the needle bar is lowered from the state, the needle tip of the sewing needle 104 hits the movable blade 102. Therefore, it is virtually impossible to sew such a minimal sequin S.

  Also, considering the feed mechanism, there are the following problems. When the feed lever 101 is moved forward to send out the sequin S, conventionally, the tip of the feed lever 101 is engaged with the center hole 106a of the second sequin S from the top of the sequin coupling body 106. In order to send out the 3 mm sequin S, it is necessary to extend the slit 100a to the movable blade 102 side. However, the rigid fixed blade 100b is fixed to the end of the support plate 100 on the movable blade side, and the slit 100a cannot be extended. Therefore, even for this reason, the conventional sequin feeder cannot feed out the minimum sequin S and sew it.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a sequin feeding device that enables sewing of a sequin coupling body composed of a minimal sequin.

  The sequin feed device according to the present invention includes a feed mechanism that feeds a sequin coupling body fed from a reel and placed on the upper surface of a support plate at a predetermined pitch corresponding to the size of one sequin, and a sewing operation of the sewing machine When the needle bar is lowered by the above, the sewing needle is inserted into the sequin hole fed out by the feed mechanism, and then urged downward by contacting the needle bar or a member interlocking with the needle bar to cut the sequin. In a sequin feeder comprising a movable blade, the thickness of a portion of the movable blade corresponding to the needle drop position is reduced and before the movable blade abuts on the needle bar or the member interlocked with the needle bar. The upper part of the portion where the thickness of the movable blade is reduced is below the uppermost part of the portion where the thickness of the movable blade is not reduced. Characterized in that it was.

  As described above, since the thickness of the portion corresponding to the needle drop position of the movable blade is reduced, the sewing needle position (that is, the position of the needle bar) is set to a position closer to the movable blade than before. The needle does not hit the movable blade. Therefore, even when sewing a tiny sequin, the sewing needle can be prevented from hitting the movable blade, so that sequins that are smaller (that is, tiny) than before can be sewn. It becomes. Moreover, it is only necessary to reduce the thickness of the portion corresponding to the needle drop position of the movable blade, and the other portions may have the same thickness as the conventional one. The thickness can be secured. Further, when the movable blade is in a posture before coming into contact with the needle bar or the member fixed to the needle bar, the thickness of the movable blade is reduced at the upper part of the thinned portion of the movable blade. Since the lower part of the movable blade is located below the uppermost part of the movable part, a part having a reduced thickness comes as the uppermost part of the movable blade. As a result, when the needle bar is driven downward during one sewing operation, the needle bar or the member fixed to the needle bar comes into contact with the uppermost part of the movable blade. Since the uppermost portion of the blade is a portion where the thickness of the movable blade is not reduced, it can easily withstand the impact at the time of contact, and the movable blade is not damaged.

  Further, the sequin feeding device of the present invention is configured such that the feeding mechanism feeds out sequins by forward and backward movements of the feeding lever, and the leading end of the feeding lever is connected to at least one sequin in the sequin coupling body on the support plate. The position where the tip should be engaged with the hole of the sequin when the feed lever is advanced is determined by the size of the sequin. It can be changed according to the characteristics.

  Thus, when the feed lever moves forward, the position where the tip should be engaged with the sequin hole can be changed according to the size of the sequin. The sequin can be sent out by engaging with the second sequin hole from the top of the body or engaging with the third sequin hole from the top. As a result, when sewing a tiny sequin, the tip of the feed lever is engaged with the third sequin hole from the top of the sequin coupling body without extending the slit of the support plate or being disturbed by the fixed blade. It is possible to send out a minimal sequin without.

  Therefore, according to the present invention, the thickness of the movable blade is reduced at a necessary portion so as to maintain the necessary strength of the movable blade, and the shape of the movable blade is devised (the thickness of the movable blade is reduced). The upper part of the part is located below the uppermost part of the part where the thickness of the movable blade is not thinned), so that the sequin is made up of the minimum number of sequins compared to the conventional method. There is an excellent effect that the connected body can be sewn.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an embodiment of the present invention in a four-head embroidery sewing machine having four sewing heads. A needle bar case 2 is provided corresponding to each sewing head, and a needle plate 50 is disposed below the needle bar of each sewing head.
The sequin sewing unit 1 is mounted on the left side and / or the right side of each needle bar case 2, and is mounted only on the left side in this embodiment. Each needle bar case 2 has a multi-needle configuration. When the sequin sewing unit 1 is mounted on the left side of the needle bar case 2 as in this embodiment, the leftmost needle in the needle bar case 2 is used for sequin sewing. Used as a needle. As is generally known, the embroidery frame 51 is driven in the horizontal direction (X direction) and the front-back direction (Y direction) according to the sewing data.

  FIG. 2 is an enlarged side view showing the sequin sewing unit 1. FIG. 3 is a side view showing the sequin feeding device 6 in the sequin sewing unit 1 in an enlarged manner, and FIG. 4 is a partially cutaway perspective view showing the main part of the feeding mechanism of the sequin feeding device 6 in an enlarged manner. .

  As shown in FIG. 2, the sequin sewing unit 1 supports a reel 5 around which a sequin coupling body 3 is wound and a sequin feeder 6 on an attachment base 4. The mounting base 4 is attached to the needle bar case 2 through a link (not shown) so as to be movable up and down. 2 and 3 show a posture in which the mounting base 4 is lowered to the lowered position and sequin sewing is possible. On the other hand, when the sequin sewing is not executed, the mounting base 4 is retracted to the upper position so as not to interfere with normal embroidery sewing. The raising / lowering drive is simultaneously performed by each head by an air cylinder (not shown). If the embroidery sewing machine has a small number of sewing heads, such as a single machine, it may be moved up and down manually.

  The reel 5 around which the sequin coupling body 3 is wound is supported on an upper end of an arm portion 4a formed on the upper portion of the mounting base 4 so as to be freely rotatable and detachable. The sequin linking body 3 is formed by connecting a large number of circular sequins S through joints S1 by punching from a film made of a synthetic resin having a constant width. The hole (center hole) 3a is formed (see FIG. 4).

  Next, a configuration example of the sequin feeder 6 will be described in detail. The sequin feeder 6 is assembled to a support plate 7 attached below the attachment base 4. A support plate 8 for supporting sequins is horizontally formed at the lower end of the support plate 7. The sequin coupling body 3 fed out from the reel 5 is suspended along the mounting base 4 via a tension roller 45 and a turning roller 46 and guided onto the support plate 8 via a guide portion 12 attached to the rear surface of the bracket 11. The embroidery sewing machine is fed rearward as viewed from the front. In the following description regarding the sequin sewing unit 1, the front-rear direction is described in reverse to the embroidery sewing machine. That is, the front of the sequin feed direction (the rear as viewed from the front of the embroidery sewing machine) is set as the front.

  The support plate 8 is provided with a slit 8a having a predetermined length in the front-rear direction (Y direction) from the front position to the center position (see FIG. 5A). The center hole 3a of each sequin S of the sequin coupling body 3 is aligned with the slit 8a by adjusting the position of the guide portion 12 in the left-right direction (X direction). That is, the guide portion 12 attached to the rear surface of the bracket 11 is for aligning the center hole 3a of each sequin S of the sequin coupling body 3 with the slit 8a of the support plate 8, and the sequin coupling body 3 is It is not for positioning at a predetermined position on the support plate 8. The slit 8a of the support plate 8 is formed when the hook 18a at the tip of the feed lever 18 and the engaging claw 33a of the lock lever 33 are engaged with the center hole 3a of the sequin S on the support plate 8, as will be described later. It is provided in order to allow biting of the tip portions 18a and 33a.

  As shown in FIG. 3, a rotation shaft 15 is supported at the center portion of the support plate 7 so that the rotation axis 15 can freely rotate along the left and right direction (X direction). A swing arm 16 is fixed to the pivot shaft 15 with a screw 17, and a feed lever 18 having a hook portion 18 a formed at the tip is supported at a free end of the swing arm 16 by a shaft 19. ing. A follower lever 20 is fixed to the pivot shaft 15 next to the swing arm 16 by a screw 21. As a result, the follower lever 20 and the swing arm 16 are integrally formed in a bell crank shape. .

  One end of the torsion spring 22 fitted to the rotating shaft 15 is fixed to the support plate 7 and the other end is hooked on the driven lever 20, whereby the swing arm 16 swings counterclockwise in FIG. 3. It is energized. Further, one end of the torsion spring 23 fitted to the shaft 19 is fixed to the swing arm 16 and the other end is hooked on the feed lever 18, whereby the feed lever 18 is urged to rotate clockwise. Yes. Therefore, the hooking portion 18 a at the tip of the feed lever 18 is always urged in a direction approaching the support plate 8.

  The feed lever 18 engages the hooking portion 18a at the tip thereof with the center hole 3a of the sequin S of the sequin coupling body 3 placed on the upper surface of the support plate 8, and moves the feed lever 18 forward. Thus, the sequin coupling body 3 is fed forward by a predetermined pitch. As will be described in detail later, the feed lever 18 moves forward and backward in accordance with the swing of the swing arm 16 so as to sequentially feed the sequin coupling body 3 forward by a predetermined pitch. The mechanism that swings the feed lever 18 corresponds to a feed mechanism that causes the feed lever 18 to move forward and backward. The free end of the driven lever 20 that is integral with the swing lever 16 is connected to the free end of the drive lever 38 via a connecting link 37. The drive lever 38 is fixed to the output shaft 40 of the motor 36 fixed to the left side surface of the mounting base 4. By driving the motor 36 to reciprocally swing the drive lever 38 within a predetermined angular range, the operation of sending out the sequin coupling body 3 is performed.

The swing arm 16 that is urged to swing in the counterclockwise direction is stopped in the posture shown in FIGS. 3, 4, and 5 by coming into contact with a stopper 25 provided on the support plate 7. This is a state in which the delivery of the sequin linking body 3 has been completed. FIG. 5A is a partial cross-sectional side view showing an enlarged main part of the sequin feeder 6 in a state where the delivery of the sequin connector 3 has been completed, and FIG. 5B is a schematic plan view thereof. That is, in the state where the delivery of the sequin coupling body 3 is completed, as shown in FIGS. 4 and 5, the hooking portion 18a of the feed lever 18 is fitted into the center hole 3a of the second sequin S from the top, A joint S <b> 1 between the first and second sequins S is located at the cutting edge of the fixed blade 8 b formed on the front end edge of the support plate 8.
The stopper 25 is a screw rod screwed to a bracket 26 fixed to the support plate 7, and the swing arm 16 abuts on the rear end thereof. The screw rod is locked by tightening the nut.

  As is clear from FIGS. 3 and 4, the movable blade 27 is rotatably supported by the pin 28 at the lower portion of the support plate 7, and is always retracted upward from the fixed blade 8 b by the torsion spring 30. Held in posture. The movable blade 27 is formed with a thin tip portion 27a, and the upper portion u of the tip portion 27a is such that the thick portion 27b becomes the uppermost portion T when the movable blade 27 is in the retracted position. Is formed in an oblique shape. When the needle bar 31 is lowered, the movable blade 27 is pushed by the needle hug 32 at the lower end thereof. When the needle 27 is pushed, the movable blade 27 swings against the elasticity of the torsion spring 30, and the fixed blade 8b. The joint S1 of the sequin S is cut in cooperation with. At this time, since the upper portion u of the tip portion 27a of the movable blade 27 is cut out obliquely so that the thick portion 27b comes to the uppermost portion T, the descending needle holder 32 is the uppermost portion T of the movable blade 27. Therefore, it is possible to prevent a problem that the front end portion 27a having a low strength is abutted and damaged. When the needle clamp 32 is raised together with the needle bar 31, the movable blade 27 returns to the retracted position by the restoring force of the torsion spring 30.

  The guide portion 12 for guiding the sequin coupling body 3 onto the support plate 8 can be exchanged according to the width of the set sequin coupling body 3. The guide member 12a having a U-shaped cross section is bent by bending the plate material. Formed. The interval between the walls where both guide portions 12a rise is set slightly larger than the width of the sequin S. A pressing member 44 is attached to the front surface of the bracket 11 to which the guide portion 12 is attached. The pressing member 44 is formed of a plate material having elasticity such as a spring steel plate, and has a predetermined length that is equal to or slightly wider than the width of the sequin S. One end thereof is fixed to the bracket 11, the central portion is bent in an arc shape, and the other end is in elastic contact with the upper surface of the support plate 8. The edge of the support plate 8 is cut away at a portion that reaches the slit 8a so as not to close the slit 8a (see FIG. 4). The sequin coupling body 3 fed out from the guide portion 12 is inserted between the support plate 8 and a pressing member 44 that is elastically in contact with the upper surface thereof.

Next, the lock lever 33 provided above the feed lever 18 and the mechanism for driving the lock lever 33 will be described.
As shown in FIG. 4, the lock lever 33 is formed with an engaging claw 33 a at the tip on one end side and a stopper portion 33 b on the other end side, and a support block 35 attached to the support plate 7 at the middle portion. On the other hand, it is rotatably supported by a pin 39. In order to make the lock lever 33 easy to see, the front portion of the support block 35 is notched in FIG. The engaging claw 33 a of the lock lever 33 passes through a through hole 18 b formed in the feed lever 18. A pin 39 provided on the support block 35 is provided with a torsion spring (not shown). The torsion spring urges the lock lever 33 to rotate counterclockwise with respect to the support block 35, and its stopper portion. When 33b abuts against the receiving portion 35a of the support block 35, the end edge of the engaging claw 33a is held in a posture facing the slit 8a of the support plate 8 in a free state. In this state, as shown in FIG. 5B, the engaging claw 33a of the lock lever 33 engages with the center hole 3a of the sequin S on the support plate 8, and locks the sequin coupling body 3 so that it cannot move. On the other hand, as will be described in detail later, when the feed lever 8 moves backward, the lip of the through hole 18b of the feed lever 18 contacts the lock lever 33, and the lock lever 33 is rotated counterclockwise by the torsion spring. The lock lever 33 is rotated clockwise against the biasing force. Thereby, the engagement claw 33a is rotated upward, and the engagement of the engagement claw 33a of the lock lever 33 with the center hole 3a of the sequin S is released.

  Note that the support block 35 that supports the lock lever 33 can adjust the fixing position of the support plate 7 in the front-rear direction (the feed direction of the sequin coupling body 3 on the support plate 8). Thereby, the position where the engaging claw 33a of the lock lever 33 engages with the center hole 3a of the sequin S can be adjusted according to the size of the sequin S. Incidentally, the fixing position of the support plate 7 can also be adjusted with respect to the mounting base 4 in the front-rear direction (feeding direction of the sequin coupling body 3 on the support plate 8).

The embroidery machine of this embodiment is provided with nine needle bars 31 on the needle bar case 2 of each sewing head, and the sequin sewing unit 1 is mounted on the left side of the needle bar case 2 as described above. When performing sequin sewing, the leftmost needle bar 31 is selected to lower the sequin sewing unit 1 to be in an operating state, and the sequin sewing is performed in cooperation with the needle bar 31.
Next, the sequin feed operation according to the present embodiment will be described with reference to FIGS.
FIG. 5 shows a state where one sequin feed operation is completed. As described above, one sequin S protrudes in front of the support plate 8, and the joint S1 is aligned with the cutting edge of the fixed blade 8b. Further, as described above, the hooking portion 18a of the feed lever 18 is engaged with the center hole 3a of the sequin S, and the engaging claw 33a of the lock lever 33 is followed by the center hole of the sequin S that continues three times thereafter. 3a is engaged.

In this state, the needle bar 31 moves downward to operate as follows.
First, the sewing needle 41 (FIG. 3) at the lower end of the needle bar 31 is fitted into the center hole 3a of the sequin S at the tip. Next, the needle holder 32 abuts against the movable blade 27 and pushes it down. As a result, the junction S1 of the sequin S is cut, and one sequin S at the tip is cut off. Then, the separated sequin S falls on the cloth to be embroidered W (FIG. 3) while keeping the sewing needle 41 inserted in the center hole 3a, and thereafter the embroidery holding the cloth to be embroidered W is held. The sequin S is sewn onto the embroidery cloth W by the movement control of the frame and the vertical movement of the needle bar.

  Next, as the motor 36 is driven, the swing lever 16 is rotated in the clockwise direction, and the feed lever 18 is retracted as shown in FIGS. Here, FIG. 6 shows a state immediately after the hooking portion 18a of the feeding lever 18 has come out of the center hole 3a, (a) is a partially sectional side view, and (b) is a schematic plan view. Since the engaging claw 33a of the lock lever 33 remains engaged with the center hole 3a at the time of withdrawal, the sequin coupling body 3 moves when the hooking portion 18a of the feed lever 18 comes out of the center hole 3a. It is reliably prevented. Further, in the state shown in FIG. 6, the edge of the through hole 18 b of the feed lever 18 contacts the lock lever 33. When the feed lever 18 is further retracted from this state, the lock lever 33 is rotated clockwise against the urging force of the torsion spring by the engagement with the rim of the through hole 18b of the feed lever 18, and the engagement. The claw 33a is separated upward from the sequin S, and the engagement of the engaging claw 33a with the center hole 3a of the sequin S is released.

  FIG. 7 shows a state in which the feed lever 18 is most retracted. FIG. 7A is a partially sectional side view, and FIG. 7B is a schematic plan view. Here, immediately before the state shown in FIG. 7 is reached, the hooking portion 18a of the feed lever 18 is once fitted into the center hole 3a of the sequin S and then escapes, and the state shown in FIG. 7 is reached. In the process from FIG. 6 to FIG. 7, the sequin coupling body 3, which has been disengaged from the engagement claw 33 a of the lock lever 33, retreats together with the retraction of the feed lever 18. This is due to the spring elasticity of the pressing member 44.

  Thereafter, the swing lever 16 is driven to swing counterclockwise by the reverse rotation of the motor 36, and the feed lever 18 moves forward to the position shown in FIG. 5. FIG. 8 and FIG. Is shown. First, FIG. 8 shows a point in time when the hooking portion 18a is engaged with the center hole 3a of the sequin S by the advancement of the feed lever 18, (a) is a partially sectional side view, and (b) is a schematic plan view. It is. By the advancement of the feed lever 18 after this time, the sequin coupling body 3 is sent out in accordance with the advance of the hook portion 18a engaged with the center hole 3a. FIGS. 9A and 9B show the moment when the lip of the through hole 18b of the forward feeding lever 18 moves away from the lock lever 33. Similarly, FIG. 9A is a partially sectional side view, and FIG. 9B is a schematic plan view. The lock lever 33 is urged to rotate counterclockwise by the elasticity of the torsion spring provided on the pin 39 when the lock of the through hole 18b of the feed lever 18 is released. FIG. 9 shows the engaging claw 33a of the lock lever 33 elastically contacting the upper surface of the sequin S. Thereafter, the engaging claw 33a of the lock lever 33 slides relatively on the upper surface of the sequin S while the feed lever 18 continues to advance. When the feed lever 18 reaches the feed end posture shown in FIG. 5, the engaging claw 33 a of the lock lever 33 engages with the center hole 3 a of the sequin S as described above.

  When the excitation of the motor 36 is OFF, for example, when the embroidery machine is not turned on, the swing lever 16 is brought into the delivery completion posture shown in FIG. 5 by the elasticity of the torsion spring 22 applied thereto. At this time, the swing lever 16 is in contact with the stopper 25. Since the motor 36 is a pulse motor and is open control, it steps out when an excessive force is applied during the feed control. Therefore, the excitation of the motor 36 is temporarily turned off when the feed lever 18 is at the most advanced position, that is, when the feed lever 18 is brought into contact with the stopper 25 after the feed is completed. As a result, even if a step-out occurs, the zero point is always returned, so that the position shift due to the step-out does not accumulate.

Next, an example of adjusting each part when the reel 5 is replaced and the sequin S to be sewn is changed to another size will be described. For this adjustment, the following adjustments (1) to (4) may be performed simultaneously or in an appropriate order.
(1) Adjusting the feed pitch In order to adjust the feed pitch, the screw 17 (see FIG. 3) that fixes the swing lever 16 is loosened, and the swing lever 16 can be easily moved by hand with respect to the rotary shaft 15. To be able to turn to. Further, the stopper 25 is unlocked, and the sequin coupling body 3 is fed from the reel 5 onto the support plate 8 to support the sequin S at the tip as shown in the “feeding end state” shown in FIG. The swing lever 16 and the feed lever 18 are moved by hand by projecting from the front edge end of the plate 8, and the hooking portion 18a of the feed lever 18 is engaged with the center hole 3a of the second sequin S from the tip. Thus, the stopper 25 is locked and the screw 17 is tightened in a state where the feeding mechanism including the swing lever 16 and the feeding lever 18 is adjusted to the “feeding end state” according to the size of the sequin S.

(2) Adjustment of the lock lever In order to adjust the lock lever 33, the support block 35 is unlocked. In a state where the stopper portion 33b at the upper end of the lock lever 33 is in contact with the receiving portion 35a of the support block 35, the engagement claw 33a of the lock lever 33 has a predetermined sequin S (the hook portion 18a is The inclination of the lock lever 33 is adjusted by manually adjusting the front and back positions of the support block 35 so as to engage the center hole 3a of the sequin S that is three after the sequin S engaged. In this manner, the position of the lock lever 33 is adjusted so that the engagement claw 33a of the lock lever 33 engages with the center hole 3a of the predetermined sequin S as shown in the “feeding end state” shown in FIG. In this state, the support block 35 is locked.

(3) Position adjustment of the sequin center hole with respect to the sewing needle position The position adjustment between the sewing needle 41 and the center hole 3a of the sequin S is performed by adjusting the position of the support plate 7 with respect to the mounting base 4. Since the support plate 7 is attached to the attachment base 4 via a guide member in the front-rear direction, first, a lock (not shown) provided in association with the guide member is released, and the support plate 7 is attached. It can be moved manually in the front-rear direction with respect to the base 4. Then, the center of the center hole 3a of the sequin S in a state where the joint S1 is fed out from the support plate 8 and aligned with the cutting edge of the fixed blade 8b is adjusted so as to match the center of the sewing needle 41. After this adjustment, the support plate 7 is locked and fixed to the mounting base 4.

(4) Replacing the guide portion The guide portion 12 provided on the bracket 11 may be replaced with one that matches the width of the replaced sequin S as required.

  Finally, an adjustment example of each part when the sequin S to be sewn is changed to the minimum sequin S ′ will be described. FIGS. 10 and 11 show, as an example, a case where a minimum sequin S ′ having a diameter of 3 mm is sewn, and reference numeral 60 indicates a minimum sequin connection body formed by connecting the minimum sequin S ′. When sewing this minimal sequin S ′, the following adjustments (1 ′) to (4 ′) are performed in the same manner as when the sequin is changed to another size.

(1 ′) Adjustment of feed pitch The method of adjusting the feed pitch when sewing the minimal sequin S ′ is substantially the same as when changing to another normal size sequin (1) described above. However, in this case, if the hook portion 18a of the feed lever 18 is engaged with the center hole 61 of the second sequin S 'from the top of the sequin coupling body 60 in the same manner as in the normal size, Before completely feeding out S ′, the hooking portion 18a of the feed lever 18 interferes with the front end portion of the slit 8a, and the joint S′1 between the leading and second sequin S ′ is moved to the cutting edge of the fixed blade 8b. Can not be located in. For this reason, when sewing the minimal sequin S ′, the center hole 61 for engaging the hooking portion 18a of the feed lever 18 is changed to the third sequin S ′ from the top as shown in FIG. Adjust the feed pitch.

(2 ′) Adjusting the lock lever The method of adjusting the lock lever when sewing the minimal sequin S ′ is substantially the same as when changing to another normal size sequin (2) described above. However, since it is the minimum sequin S ′, the center hole 61 with which the engaging claw 33a of the lock lever 33 engages becomes the sequin S ′ five times after the sequin S ′ with which the hook portion 18a is engaged.

(3 ') Sequin center hole position adjustment with respect to the sewing needle position The sequin center hole position adjustment method with respect to the sewing needle position when sewing the minimal sequin S' is the other normal size described in (3) above. It is almost the same as when changing to sequin. At this time, in the sequin S ′ having a diameter of 3 mm, the center of the center hole 61 of the sequin S ′ at the tip of the sequin coupling body 60 is positioned 1.5 mm from the cutting edge of the fixed blade 8b, and the sewing needle 41 descends to this position. It becomes. In FIG. 11, after the needle bar 31 is lowered and the sewing needle 41 is inserted into the center hole 61 of the sequin S ′ at the tip, the needle clamp 32 at the lower end of the needle bar 31 is just before contacting the movable blade 27. The state is shown. As is apparent from FIG. 11, even if the sewing needle 41 descends to a position 1.5 mm before the cutting edge of the fixed blade 8b in order to sew a minimal sequin S ′ having a diameter of 3 mm, the tip of the movable blade 27 By reducing the plate thickness of 27a, the sewing needle 41 does not hit the movable blade 27.

(4 ′) Replacement of guide portion As in the case of (4) described above, when sewing the minimum sequin S ′, the guide portion 12 provided on the bracket 11 matches the width of the replaced minimum sequin S ′. Replace with something.

  As described above, according to this embodiment, the center hole 61 of the sequin S ′ that engages the hook portion 18 a of the feed lever 18 can be changed, so that the hook portion 18 a can be changed to the head of the sequin coupling body 60. The minimum sequin S ′ can be sent out by engaging with the center hole 61 of the third sequin S ′. Further, by forming a thin tip end portion 27a on the movable blade 27, the sewing needle 41 can be moved even when the distance between the cutting edge of the fixed blade 8b and the sewing needle 41 is short in order to sew the minimum sequin S ′. It does not hit the blade 27. From these things, it becomes possible to sew the minimum sequin S ′.

In the above-described embodiment, the motor 36 is installed at the upper position due to the relationship, and the swing lever 16 is driven via the link. However, the swing lever 16 is directly driven by the output shaft 40 of the motor 36. You may make it do. That is, the rotating shaft 15 and the driven lever 20 may be eliminated, the motor 36 may be fixed to the support plate 7, and the swing lever 16 may be fixed to the output shaft 40.
Further, in the above embodiment, when the feed lever 18 is retracted, the lock lever 33 is unlocked after the timing of FIG. 6, but not limited to this, at least the timing (feed lever 18 of FIG. 7). It is only necessary that the lock by the lock lever 33 is released by the time when the forward movement is resumed. If the lock lever 33 is locked until the timing shown in FIG. 7 (the feed lever 18 resumes moving forward), the lock lever 33 is used to press the sequin coupling body 3 when the feed lever 18 is retracted. Since it can do, the special holding member 44 can be made unnecessary.

  In the above-described embodiment, the mechanism for driving the lock lever 33 is such that the counterclockwise rotation is performed by the urging force of the torsion spring provided on the pin 39 of the support block 35, and the clockwise rotation is the reverse feed. Although it is configured to be performed by engaging the edge of the through hole 18b of the lever 18 with the lock lever 33, the configuration is not limited to this, and any configuration may be employed. For example, the spring used as the biasing means may be other than a torsion spring, and the biasing means may include an electric, electronic, or mechanical driving means other than the spring.

According to the present embodiment, since the engaging claw 33a of the lock lever 33 is engaged with the center hole 3a or 61 of the sequin S or S ′ when the sequin delivery is completed, Even if an unexpected pulling force acts on the sequin S or S ′ after the sewing needle 41 is inserted into the center hole 3a or 61 of S ′ and then cut, the sequin coupling body 3 or 60 is pulled out. Therefore, the sequin S or S ′ is always cut at the joint S1 or S′1, and the sequin S or S ′ is not cut into a distorted shape.
Further, when the sequin delivery is completed, the hooking portion 18a of the feed lever 18 and the engagement claw 33a of the lock lever 33 are engaged with the center hole 3a or 61 of the sequin S or S ', so The position of the body 3 or 60 is restricted at two locations in the length direction (feeding direction). Accordingly, the position of the sequin S or S ′ is corrected in the width direction at least every time the sequin delivery is completed. For this reason, the guide member for position control of the sequin coupling body 3 or 60 on the support plate 8 is unnecessary.
Further, in the above-described embodiment, the needle holder 32 abuts on the movable blade 27 when the needle bar 31 is lowered. However, the present invention is not limited to this, and an appropriate part of the needle bar 31 or a downward movement of the needle bar 31 is used. An appropriate interlocking member may be brought into contact with the movable blade 27 to push down the movable blade 27.

  Note that both the normal size sequin S and the minimum sequin S ′ are not limited to providing the needle-passing holes 3a and 61 in the center (referred to as center holes), and may be appropriately decentered. In that case, if the sequin coupling body 3 or 60 is arranged so that the shortest diameter portion of the sequin S or S 'with respect to the eccentric holes 3a and 61 is located in the front of the feeding direction, the eccentric hole 3a of the sequin S or S'. The longest diameter portion with respect to 61 is behind the feed direction, and the longest diameter portion can be accurately aligned so as to come to a position corresponding to the blade width of the movable blade 27. Thereby, without changing the blade width of the movable blade 27 (thickness of the thin tip portion 27a), the eccentricity of the eccentric holes 3a and 61 of the sequin S or S ′ is appropriately determined (in consideration of the appearance of the finished product). By changing it, it becomes possible to sew sequins of even smaller size. For example, if the minimum value of the minimum sequin S ′ provided with the center hole 61 is 3 mm in diameter with respect to a certain predetermined thickness of the thin tip portion 27a of the movable blade 27, it corresponds to the blade width of the movable blade 27. It is sufficient that the diameter of the part to be moved (the rear part in the feed direction) is secured to 1.5 mm, and the longest diameter part to be arranged behind the feed direction is secured to 1.5 mm, and the front part in the feed direction. For example, if the shortest diameter portion to be disposed at 1.0 is set to 1.0 mm, it is possible to sew a still-size sequin having a diameter of 2.5 mm. Even when the thickness of the tip of the movable blade 27 is not reduced, the needle passage hole 3a of the sequin S is decentered as described above so that the longest diameter portion comes to a position corresponding to the blade width of the movable blade 27. The sequin S having a smaller size than conventional can be sewn.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view showing an embodiment of an embroidery sewing machine that implements a sequin feeder according to the present invention. The side view which expands and shows the part of the sequin sewing unit in the Example. The side view which expands further and shows the part of the sequin feeder in the sequin sewing unit in the Example. FIG. 4 is a partially cutaway perspective view showing a further enlarged main part of the sequin feeder shown in FIG. 3. The partial cross section side view and plane top view of the principal part of the sequin feeder apparatus which show the state which the feed lever advanced most and one sequin feed operation was complete | finished. The partial cross-section side view and plane schematic diagram of the principal part of a sequin feeder device which show the state immediately after the hooking part slipped out from the center hole of the sequin when the feed lever is retracted. The partial cross section side view and plane schematic of the principal part of the sequin feeder which show the state which the feed lever retracted most. The partial cross section side view and plane schematic diagram of the principal part of the sequin feeder which show the state at the time of the hook part engaging the center hole of sequin at the time of advance of a feed lever. The partial cross section side view and plane schematic diagram of the principal part of the sequin feeder which show the state of the moment when the lip of the through hole of a feed lever separates from a lock lever at the time of advance of a feed lever. The example of the feed operation of the minimum sequin according to the present embodiment, showing the main part of the sequin feed device showing the state where the feed lever has moved forward most and the feed operation of one minimum sequin has been completed, (a) The partial cross section side view, (b) is the plane schematic diagram, (c) is the partially cutaway perspective view. FIG. 11 is a partial cross-sectional side view showing a state immediately before the needle bar is lowered and the needle clamp at the lower end thereof comes into contact with the movable blade in the feeding operation end state shown in FIG. 10. The side view and top view which show the problem in the conventional sequin feeder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sequin sewing unit 2 Needle bar case 3 Sequin coupling body 3a Sequin center hole S Sequin S1 Sequin joint 4 Mounting base 5 Reel 6 Sequin feeder 7 Support plate 8 Bearing plate 16 Swing arm 18 Feed lever 18a Feed lever 18a Hook 20 Drive lever 33 Lock lever 33a Lock lever engagement claw 35 Support block 36 Motor 37 Connection link 38 Drive lever 60 Minimal sequin connection 61 Minimal sequin center hole S 'Minimal sequin S'1 Minimal sequin joint 8b Fixed blade 27 Movable blade 27a Tip of movable blade with reduced plate thickness

Claims (2)

When the needle bar is lowered by a feed mechanism that feeds the sequin coupling body fed out from the reel and placed on the upper surface of the support plate at a predetermined pitch corresponding to the size of one sequin, and the sewing operation of the sewing machine, A sequin feeding device comprising a movable blade that urges downward by cutting a sequin by contacting a needle bar or a member interlocking with the needle bar after a sewing needle is inserted into a sequin hole fed by a feeding mechanism In
The thickness of a portion of the movable blade corresponding to the needle drop position is reduced, and when the movable blade is in a posture before contacting the needle bar or the member interlocked with the needle bar, A sequin feeding device characterized in that an upper portion of the portion having a reduced thickness is located below an uppermost portion of a portion where the thickness of the movable blade is not reduced.   The feed mechanism is configured to send out sequins by forward and backward movements of the feed lever, the tip of the feed lever is engaged with the hole of at least one sequin in the sequin coupling body on the support plate, and the feed lever is A feed operation is performed by advancing, and the position where the tip should be engaged with the hole of the sequin when the feed lever is advanced can be changed according to the size of the sequin. The sequin feeder according to claim 1.

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