WO2006035809A1

WO2006035809A1 - Multi-needle embroidery machine

Info

Publication number: WO2006035809A1
Application number: PCT/JP2005/017834
Authority: WO
Inventors: Ikuo Tajima; Katsuharu Yoshikawa
Original assignee: Tokai Kogyo Mishin Kabushiki Kaisha
Priority date: 2004-09-28
Filing date: 2005-09-28
Publication date: 2006-04-06
Also published as: KR20070049649A; CN101027444A; KR100794874B1; TR200701916T1; JP2006094918A

Abstract

A multi-needle embroidery machine, comprising a multi-needle sewing machine head (3), a shuttle base (5), a color change mechanism (23) selecting the needle position of the multi-needle sewing machine head which are movably disposed in the lateral direction (X-direction) of a sewing machine frame and a traverse mechanisms (22) and (31) moving them integrally in the lateral direction. The embroidered area of a long web (N) is stretched on a pair of front and rear feed rollers (52a) and (52b) extending in the lateral direction, and the web stretched by the rotation of the feed rollers (52a) and (52b) is fed in a cloth longitudinal direction (Y-direction). The web stretched on the feed rollers (52a) and (52b) is not moved in the X-direction. The multi-needle sewing machine head (3), the shuttle base (5), and the color change mechanism (23) are integrally moved in the X-direction to realize a two-dimensional sewing pattern. Thus, when embroidering is performed for the portion of the web stretched between the pair of feed rollers, the meandering of the web and the looseness of its stretching can be prevented from occurring.

Description

Specification

Multi-needle embroidery machine

Technical field

[0001] The present invention relates to a multi-needle embroidery sewing machine having a sewing thread color changing mechanism, and more particularly to a multi-needle embroidery sewing machine that performs embroidery sewing on a long original fabric. The present invention relates to a multi-needle embroidery sewing machine provided with a mechanism that stretches between a pair of feed rollers and rotates the feed rollers to feed an original fabric in one direction.

Background art

[0002] Patent Document 1 below discloses a roller traverse mechanism in which a long original fabric is stretched between a pair of feed rollers, and the feed roller is rotated to feed the original fabric in one direction (front-rear direction, that is, Y direction). The equipped embroidery machine is shown. In the embroidery sewing machine disclosed in Patent Document 1, the pair of feed rollers themselves are moved in the axial direction (X direction) in order to feed the cloth in the lateral direction (X direction).

Patent Document 1: JP-A-58-197364

[0003] In the embroidery sewing machine shown in Patent Document 1 above, the feed roller moves in the axial direction as it rotates, so that the original fabric meanders along with the feed of the original fabric or the original fabric is stretched in the width direction. The pattern may be loosened and slipped. To prevent this, there are embroidery sewing machines that have a mechanism that prevents the meandering of the original fabric and a mechanism that spreads the original fabric in the width direction. However, in addition to the mechanism that controls the movement of the feed roller in the axial direction, it prevents meandering. The structure of the embroidery sewing machine becomes complicated because the mechanism and the spreading mechanism must be further provided.

Disclosure of the invention

[0004] The present invention has been made in view of the above points, and can eliminate the drawbacks of the conventional roller traverse mechanism in a multi-needle embroidery sewing machine having a sewing thread color changing mechanism. It seeks to provide an improved configuration.

[0005] The present invention provides a multi-needle sewing head having a plurality of stitches and needles, a pot base having a hook arranged below the multi-needle sewing head, and the multi-needle sewing head! In a multi-needle embroidery sewing machine equipped with any sewing and color change mechanism that selectively positions the needle at a predetermined operating position The multi-needle sewing head, the pot base and the color changing mechanism are arranged so as to be movable in the lateral direction with respect to the sewing machine frame, and a lateral movement mechanism for moving these integrally in the lateral direction, and a long original fabric. A pair of front and rear feed rollers extending in the lateral direction for extending the stretched embroidery region and transporting the stretched original fabric in the cloth length direction, and the original fabric stretched on the pair of feed rollers The embroidery area is moved back and forth in the cloth length direction, and the multi-needle sewing head, the pot base and the color changing mechanism are integrally moved left and right in the horizontal direction by the lateral movement mechanism. It is characterized by realizing sewing and patterns.

[0006] According to the present invention, the multi-needle sewing head, the shuttle base, and the color changing mechanism are arranged so as to be movable in the lateral direction with respect to the sewing machine frame, and the lateral movement mechanism for moving these integrally in the lateral direction is provided. Since it is provided separately from the pair of feed rollers, the fabric feed in the lateral direction (X direction) for realizing the desired two-dimensional sewing pattern is performed by the lateral movement mechanism without powering the original fabric. This is realized by moving the needle sewing head, the pot base, and the color changing mechanism together. On the other hand, cloth feed in the front-rear direction (Y direction) for realizing a desired two-dimensional sewing pattern is performed by moving a long original fabric in the cloth length direction (Y direction) with a pair of feed rollers. Realized. In this way, the pair of feed rollers are not driven in the axial direction but are only rotated, so that the original fabric stretched on the rollers is not driven in the width direction (lateral direction), and the cloth length direction (front-rear direction) ), The original fabric meanders with the progress of the embroidery stitching, and the stretch of the original fabric in the width direction does not loosen, so that the finished embroidery pattern does not shift. This simplifies the structure of the embroidery sewing machine that does not require a mechanism for preventing the meandering of the original fabric or a mechanism for spreading the original fabric in the width direction.

Brief Description of Drawings

FIG. 1 is a front view of a multi-needle embroidery sewing machine according to an embodiment of the present invention.

FIG. 2 is a plan view showing the multi-needle embroidery sewing machine with an upper frame and a sewing machine head omitted.

FIG. 3 is a side sectional view taken along the line I-I in FIG.

FIG. 4 is a side sectional view taken along the line II-II in FIG.

FIG. 5 is a rear view of the sewing machine according to the embodiment.

FIG. 6 is an enlarged side view showing one sewing head.

FIG. 7 is an enlarged front view showing the configuration of the color change mechanism. FIG. 8 is a side sectional view of the color change mechanism.

FIG. 9 is an enlarged front view showing an example of a mechanism for transmitting the rotational motion of the spindle motor with respect to the sewing machine spindle and the lower shaft by spline coupling.

FIG. 10 is an enlarged side sectional view taken along line III-III in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of a multi-needle embroidery sewing machine according to an embodiment of the present invention, FIG. 2 is a plan view showing the multi-needle embroidery sewing machine with the upper frame 1 and sewing head 3 omitted, and FIG. Fig. 4 is a side sectional view according to line II-II in Fig. 1, and Fig. 5 is a rear view of the sewing machine. The sewing machine frame is composed of an upper frame 1 and a lower frame 2. In this embodiment, an example of a multi-head multi-needle embroidery sewing machine is shown. A sewing head 3 having a plurality of (for example, three) sewing needles and needles is attached to the front surface of the upper frame 1 via a mounting plate 11. A plurality of sewing machines are arranged in the transverse (longitudinal) direction of the sewing machine. Below each sewing machine head 3, a pot base 5 having a hook 4 is arranged.

FIG. 6 is an enlarged side view showing one sewing head 3. As shown in FIG. 6, the sewing machine head 3 includes an arm 6 and a needle bar case 7 supported by the arm 6 so as to be slidable in the lateral direction. The needle bar case 7 includes a plurality of (for example, three) needle bar cases 7. There are 8 sewing needles. As will be described later, the needle bar case 7 is slid in the horizontal direction by the color changing mechanism 23, and any one sewing needle 8 is selectively positioned at a predetermined operating position (selected position). Each sewing machine head 3 is provided with a sewing machine spindle 9 penetrating, and the sewing V ヽ needle 8 positioned at the operating position (selected position) is moved up and down by the rotation of the sewing machine spindle 9. RU Each hook base 5 is provided with a lower shaft 10 passing therethrough, and the rotation of the lower shaft 10 causes the hook 4 to rotate. This sewing is performed by the up-and-down movement of the needle 8 and the rotation of the hook 4 to perform well-known sewing and operation.

[0010] The arm 6 of the sewing head 3 is fixed to two mounting plates 11, and the mounting plate 11 is movably provided on two guide rails 12 fixed to the front surface of the upper frame 1. Fixed to a plurality of sliders 13 provided. As a result, each sewing head 3 can move integrally with respect to the upper frame 1 via the slider 13 of the mounting plate 11 in the arrangement direction, that is, in the lateral direction (X direction). A base 14 is fixed to the front surface of the lower frame 2, and a rail base 16 is fixed above the base 14 via a stud 15. The hook base 5 is fixed to a mounting plate 17 that is long in the X direction, and the mounting plate 17 includes a plurality of sliders 19 (movable on a guide rail 18 fixed to the upper surface of the rail base 16. Each pot base 5 is fixed to a certain length). As a result, each hook base 5 can also be moved integrally with respect to the lower frame 2 via the slider 19 of the mounting plate 17 in the arrangement direction of the sewing heads 3, that is, in the lateral direction (X direction). . The pot base 5 is provided with a pair of support rollers 21 via brackets 20. The rail base 16 is sandwiched between the support rollers 21 to guide the movement of the pot base 5 and suppress the vibration of the pot base 5 that may occur during the sewing machine operation.

As shown in FIGS. 1 and 2, an interlocking plate 22 is fixed near the right end of the two mounting plates 11 of the sewing machine head 3 and the mounting plate 17 of the pot base 5. The mounting plate 11 and the mounting plate 17 shown in FIG. A color change mechanism 23 for sliding the needle bar case 7 of each head 3 to selectively place an arbitrary sewing needle 8 at a predetermined operating position (selected position) is fixed to the front surface of the interlocking plate 22. It is set up. As a result, as the interlocking plate 22 moves in the horizontal direction (X direction), the sewing machine head 3, the pot base 5 and the color change mechanism 23 are integrally moved in the horizontal direction (X direction). Become.

FIG. 7 is an enlarged front view showing the configuration of the color change mechanism 23, and FIG. 8 is a side sectional view of the color change mechanism 23. 7 and 8, the color changing mechanism 23 includes a frame member 24 having a U-shaped cross section fixed to the interlocking plate 22, a ball screw 25 rotatably supported by the frame member 24, and a ball screw. A nut member 26 screwed into 25, a mover 28 attached to the nut member 26, and a guide shaft 27 for guiding the mover 28 are provided. A drive motor 29 is fixed to the frame member 24, and the motor shaft of the drive motor 29 is connected to one end of a ball screw 25. Thus, when the drive motor 29 is driven, the ball screw 25 is rotated, and the movable element 28 is slid together with the nut member 26. One end of a rod (slide drive member) 30 is fixed to the moving element 28, and the rod 30 is connected to the needle bar case 7 of each sewing head 3. As a result, when the driving motor 29 is driven in an appropriate amount for changing the color of the sewing thread, the moving motor 28 is slid by the driving of the driving motor 29. Accordingly, the needle bar case 7 of each sewing head 3 is slid left and right through the rod 30. Thus, among the plurality of sewing needles 8 in the needle bar case 7, an arbitrary sewing needle 8 is selectively positioned at a predetermined operating position (selected position).

As shown in FIG. 1, the interlocking plate 22 is connected to the drive mechanism 31 to form a lateral movement mechanism! / The drive mechanism 31 is fixed to a plate 32 (see FIG. 3) fixed between the upper frame 1 and the lower frame 2. As shown in FIG. 1, the drive mechanism 31 includes a frame member 33 fixed to the plate 32, a ball screw 34 rotatably supported by the frame member 33, a moving member 35 that is slid by the rotation of the ball screw 34, A drive motor 36 for rotating the ball screw 34 is provided, and the interlocking plate 22 is fixed to the front surface of the moving element 35. Thus, when the drive motor 36 is driven forward or backward, the interlocking plate 22, the mounting plate 11, and the mounting plate 17 are moved to the left or right in the arrangement direction of the sewing head 3, that is, in the lateral direction (X direction). Then, the color change mechanism 23, the sewing machine head 3, and the hook base 5 are integrally moved to the left or right in the lateral direction (X direction). When the sewing head 3 and the pot base 5 are moved in the horizontal direction (X direction), the sewing machine main shaft 9 and the lower shaft 10 are also moved in the same direction. Typically, the drive motor 36 is driven according to the X direction component of the sewing width data corresponding to the embroidery sewing pattern.

FIG. 9 shows an example of a mechanism for transmitting the rotational motion of the spindle motor 41 with respect to the sewing machine spindle 9 and the lower shaft 10 by spline coupling, and an enlarged front view of the front left portion of the embroidery sewing machine according to the present embodiment. FIG. FIG. 10 is an enlarged side cross-sectional view taken along line III-III in FIG. As shown in FIG. 9, a spline shaft 37 is connected to the left end portion of the sewing machine main shaft 9. The spline shaft 37 is provided with a spline bearing 38 that can slide along the axis of the spline shaft 37 and rotates together with the spline shaft 37. A spindle pulley 39 is fixed to the spline bearing 38. As shown in FIG. 10, the spindle pulley 39 is connected to a spindle motor 41 fixed to the back surface of the upper frame 1 via a timing belt 40. A pulley shaft 42 is connected to the left end portion of the spline shaft 37. The pulley shaft 42 is rotatably supported by the transmission box 43, and a driven pulley 44 positioned in the transmission box 43 is fixed to the pulley shaft 42. A lower pulley 45 fixed to the lower shaft 10 is located below the transmission box 43. The driven pulley 44 and the lower pulley 45 are connected by a timing belt 46. The transmission box 43 has a tension pulley 47 in the middle of the driven pulley 44 and the lower shaft pulley 45. It is provided so that the tension of the timing belt 46 can be adjusted. Thus, when the main shaft motor 41 is driven, the sewing machine main shaft 9 and the lower shaft 10 are rotated, the sewing needle 8 is moved up and down, and the shuttle 4 is rotated. The drive of the main shaft motor 41 is transmitted to the sewing machine main shaft 9 and the lower shaft 10 while allowing the spline shaft 37 and the spline bearing 38 to allow the main shaft 9 and the lower shaft 10 to slide in the axial direction.

[0016] The transmission box 43 has a rear surface fixed to a slider 49 that is movably provided on a guide rail 48 fixed to the front surface of the upper frame 1, and a bottom surface of the transmission box 43 to a base 14 of the lower frame 2. It is fixed to a slider 51 that is movably provided on a guide rail 50 fixed via 15. The driven pulley 44 and the lower shaft pulley 45 in the transmission box 43 are provided with their positions regulated, and together with the sewing machine head 3 and the hook base 5, the sewing machine main shaft 9 and the lower shaft 10 are arranged in the X direction (the sewing head 3 When it is moved in the arrangement direction), the transmission box 43 is similarly moved via the driven pulley 44 and the lower shaft pulley 45. In FIG. 9, the state in which the transmission box 43 has moved to the rightmost side is indicated by a solid line, and the state in which the transmission box 43 has moved to the leftmost side is indicated by an imaginary line 43 ′.

As shown in FIGS. 2 to 4, a pair of feed rollers 52 a and 52 b are arranged at the front and rear positions of the pot base 5. Each feed roller 52a, 52b is rotatably supported at both ends by roller support bases 53a, 53b and 54. The right roller support bases 53a and 53b are divided forward and backward to prevent interference with the interlocking plate 22. A drive motor 55 for rotating the feed rollers 52a and 52b is fixed to the left roller support 54. The drive motor 55 may be provided individually for each of the feed rollers 52a and 52b. However, only one drive motor 55 may be provided to transmit the same amount of rotational motion to both the rollers 52a and 52b. Since each feed roller 52a, 52b is long, there is a risk that the center part may squeeze if it is only supported at both ends. The middle part is supported by bearing 56.

As shown in FIG. 4, each roller support base 53a, 53b, 54 is provided with a tension roller 57 that can abut against each feed roller 52, respectively. Both ends of the tension roller 57 are rotatably supported by the support members 58, and the support members 58 are provided on the roller support bases 53a, 53b, 54 so as to be movable back and forth. The roller support bases 53a, 53b, 54 are individually provided with drive motors 59 for independently driving the support members 58 back and forth, The driving force of each drive motor 59 switches the position force of each tension roller 57 to either a position where the tension roller 57 abuts on each feed roller 52 or a position away from the feed roller 52.

[0019] Each support member 58 is fixed with a drive motor 60 for rotating and driving each tension roller 57, and the original fabric N is set in order to spread the original fabric N set on the feed roller 52. A force to rotate in the direction of stretching is applied. That is, the front feed roller 52a is given a tendency to rotate forward (counterclockwise), and the rear feed roller 52b is given a tendency to rotate backward (clockwise). This rotational force for spreading is set to be weaker than the rotational force for cloth feeding applied to each feed roller 52a, 52b, and each feed roller 52a, 52b is driven by the drive motor 55 to feed the original fabric N. When rotated in the same direction, each tension roller 57 is also rotated. A guide bar 61 is provided above each tension roller 57, and both end portions of each guide bar 61 are fixed to the roller support bases 53a, 53b, 54.

[0020] As shown in Figs. 3 to 5, on the back side of the embroidery sewing machine, supply portions S1, S2 for supplying a long original fabric are provided. The upper supply section S1 can set one wide roll N1. The lower supply section S2 is configured so that two narrow rolls Ν2 and Ν3 can be set in the horizontal direction. In FIG. 5, for convenience of explanation, the force in which the rolls of the original fabric are set in both supply sections Sl and S2 is illustrated. Actually, depending on the purpose, the raw fabric roll is applied to either one of them. Shall be set.

As shown in FIG. 4, the upper supply section S1 has a support section 62 that supports a wide roll N1, a drive source (not shown) that rotates the roll N1, and a tension bar that can move up and down. 63 and 4 guide rollers 64, 65, 66, 67 forces are provided. Lower 佃 J supply には S2 includes support portions 68 and 69 that support narrow original rolls N2 and N3, a drive source (not shown) that rotates rolls N2 and N3, and a tension bar that can move up and down 70 Three guide rollers 71, 72, 73 are provided. When embroidering a wide web N, roll N1 is set on the support 62 of the upper supply unit S1, and the web N fed from the roll N1 is guided to the guide port 64, tension bar 63, and guide. It is guided to the feed roller 52 through the roller 65 and the guide roller 66. On the other hand, when embroidering a narrow original fabric N, the lower support part S2 support part 68 Roll N2 and N3 are set in 69, and the raw material N fed from both rolls N2 and N3 is guided to guide roller 71, tension bar 70, guide roller 72, guide roller 73, and upper supply section S1 guide roller. 67, guided to the feed roller 52 through the guide roller 66.

[0022] The raw material N fed from the supply section S1 or S2 is wound around the rear tension roller 57 via the rear guide bar 61, passed over the pair of feed rollers 52, and then the front tension roller. Wrap it around 57 and place it in front of the embroidery sewing machine via the front guide bar 61!

When the original fabric N is set, the drive motor 59 drives the support members 58 back and forth so that the tension rollers 57 are separated from the feed rollers 52. Moreover, since both rolls Sl and S2 cannot be used to set a plurality of rolls when embroidering the original fabric, the supply stand for the embroidery sewing machine is located behind the embroidery sewing machine. The detailed description is omitted.

[0023] When embroidery sewing is performed, the roll N is fed out to the collection stand as described above, and the spindle motor 41 is driven to move the sewing needle 8 up and down and rotate the hook 4 as described above. Let According to the sewing width component in the Y direction of the embroidery pattern data to be sewn, the feed rollers 52a and 52b are rotated by an appropriate amount in the forward or reverse direction to move the original fabric N by an appropriate amount in the front-rear direction (Y direction). The drive motor 36 is rotated by an appropriate amount in accordance with the sewing width component in the X direction, and the sewing machine head 3, the pot base 5, and the color change mechanism 23 are arranged in the arrangement direction of the sewing machine head 3, that is, the horizontal direction (X Direction). At this time, a rotational force is applied to each tension roller 57 in the direction of extending the embroidery area of the original fabric N stretched over the pair of feed rollers 52a and 52b. The original fabric N between 52a and 52b is properly stretched. When the original fabric N is sent, the tension bars 63 and 70 of the supply sections Sl and S2 are pulled by the original fabric N and raised. When the tension bars 63 and 70 are raised to a certain position, the rolls Nl, N2 and N3 of the original fabric are rotated to feed out the original fabric N.

[0024] As described above, since the feed operation with respect to the original fabric N is only in one direction (Y direction), the original fabric N meanders as the embroidery progresses, or the width direction of the original fabric N (X direction). ) Will not loosen and the finished pattern will not shift. As a result, there is no need to provide a mechanism for preventing the meandering of the original fabric or a mechanism for spreading the original fabric in the width direction. Construction is simplified. Also, by sliding the color change mechanism 23 together with the sewing head 3, the color change in the sewing head 3 can be easily performed with a normal structure and control. If the structure is such that the color change mechanism 23 is not slid, a structure that allows the machine head 3 to slide relative to the color change mechanism 23, or a process that calculates the slide of the machine head 3 and performs color change selection control, etc. are required. It becomes.

In the above embodiment, the force that the slide drive structure of the color change mechanism 23 and the slide drive structure of the drive mechanism 31 are a ball screw type rotational linear conversion structure is not limited to this. Other appropriate configurations such as a linear motion structure may be used. In the above embodiment, each of the feed rollers 52a and 52b is divided into left and right parts and the intermediate part thereof is supported by the bearing 56. However, the intermediate part may not necessarily be supported. In addition, the present invention is not limited to a multi-head type sewing machine but can be applied to a single-head multi-needle sewing machine.

Claims

The scope of the claims

[1] a multi-needle sewing head having a plurality of sewing needles;

A pot base having a hook arranged below the multi-needle sewing head;

A color changing mechanism for selectively positioning an arbitrary sewing needle at a predetermined operating position in the multi-needle sewing machine head;

A multi-needle embroidery sewing machine with

A multi-needle sewing head, a pot base, and a color changing mechanism are arranged so as to be movable in a horizontal direction with respect to the sewing machine frame, and a horizontal movement mechanism for moving these integrally in the horizontal direction;

A pair of front and rear feed rollers extending in the transverse direction to extend the embroidery region of the long original fabric and transport the extended original fabric in the cloth length direction;

And moving the embroidery area of the original fabric stretched on the pair of feed rollers back and forth in the cloth length direction, and integrating the multi-needle sewing head, the pot base and the color changing mechanism by the lateral movement mechanism. A multi-needle embroidery sewing machine that achieves the desired two-dimensional sewing pattern by moving it horizontally from side to side.

[2] A plurality of the multi-needle sewing heads are arranged at predetermined intervals in the lateral direction, and a plurality of the pot bases and the color changing mechanism are associated with each of the plurality of multi-needle sewing heads. The horizontal movement mechanism is configured to move the plurality of multi-needle sewing heads, the pot base, and the color change mechanism integrally in the horizontal direction with respect to the sewing machine frame. The multi-needle embroidery sewing machine according to claim 1.

[3] Each of the multi-needle sewing heads includes a plurality of sewing!

The color change mechanism includes a slide drive member connected to the needle bar case of each multi-needle sewing head and a predetermined sewing needle of each needle bar case by sliding the slide drive member by a predetermined amount. A drive unit that is selectively positioned at the operating position of the motor, and a base that fixes the drive unit,

The multi-needle sewing heads are connected to each other via a first attachment member, and the first attachment member is attached so as to be movable laterally with respect to the sewing machine frame. Lateral to the sewing machine frame via the first mounting member Can move in the direction

The pot bases are connected to each other via a second mounting member, and the second mounting member is attached to the sewing machine frame so as to be movable in the lateral direction, so that the pot bases are connected to the second mounting member. It can be moved laterally with respect to the sewing machine frame via the mounting member.

The lateral movement mechanism includes an interlocking member that couples the first and second mounting members and the base of the color changing mechanism, and a drive mechanism that moves the interlocking member in the lateral direction. By moving the interlocking member in the horizontal direction, the multi-needle sewing head, each hook base, and the color changing mechanism are integrally moved in the horizontal direction. Claim 1 or 2 The multi-needle embroidery machine described in 1.