JP2008086561A - Embroidery machine and zigzag sewing method for flat tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an embroidery machine capable of carrying out zigzag stitch sewing with the face of a flat tape precisely arranged on a cloth face in a flat condition when sewing the flat tape to the cloth with zigzag stitches. <P>SOLUTION: A guide portion is provided at the lower part of a turning member located on the outer peripheral position of a needle bar and provided reciprocally turnably around a needle dropping position, and can reciprocally turn around the needle dropping position along the face of a needle plate and near the needle plate, the direction parallel to the needle plate is formed wider so as to be able to guide the flat tape fed from a bobbin into the face parallel to the needle plate in the shape of a guide hole of the guide portion, further the swing width size of the guide part is set to be a size large enough to remove the flat tape sewn to the cloth from above the needle dropping position to left or right side alternatively, the timing of the turning movement of the swing width range of the guide portion is set such that the turning movement is carried out from the time when a presser foot presses the flat tape to the time when the presser foot presses the flat tape in the next step. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an embroidery sewing machine, and more particularly to an embroidery sewing machine in which an embroidery material is sewn on a cloth by staggered stitching.

   In a conventional embroidery sewing machine, a needle bar that has a sewing needle (hereinafter also referred to as “needle”) attached to the lower end and is driven to reciprocate up and down, a nipple that moves up and down in synchronization with the needle bar, and the needle A rotating bush that is driven to rotate around the axis of the bar, a bobbin that stores embroidery material in the form of tape or cord, and the embroidery material that is fed out from the bobbin is guided toward the needle drop position on the needle plate. A guide lever having a lower portion of the guide lever. The guide lever is rotatably supported via a lever pin with respect to the rotary bushing, and the movement direction of the cloth to be embroidered with the lever pin 51 as a rotation fulcrum. A device that is capable of reciprocating rotation (swing) in a crossing direction (also referred to as left and right) is known. (For example, refer to Patent Document 1).

Japanese Patent No. 3145469

In this conventional embroidery sewing machine, flat tape is used as the embroidery material, and it is staggered with respect to the cloth (the embroidery material itself is not allowed to fall into the needle by swinging the embroidery material at the needle base position of the sewing needle. When this embroidery material is sewn to the cloth to be embroidered), the guide lever swings around the lever pin as a pivot, and the guide provided under the guide lever is like a swing cross. The flat tape is guided to the left and right while swinging the surface of the flat tape up and down with respect to the needle plate surface, so a wide flat tape is a cloth whose surface is placed on the needle plate. When it is inclined with respect to the upper surface of the cloth, it is pressed by the thread sewn on the cloth and sewn on the cloth.
When the zigzag stitching operation was performed at a high speed, the flat tape was bent and sewn on the upper surface of the cloth, and the embroidery pattern collapsed, resulting in a problem of degrading the quality of the embroidery product.

The purpose of this application is not only that the embroidery material can be sewn on the cloth by zigzag stitching, but also when the flat tape is sewn on the cloth by zigzag stitching, the surface of the flat tape remains flat on the fabric surface. It is intended to provide an embroidery sewing machine that can be stitched in a zigzag manner.
Other objects and advantages will be readily apparent from the drawings and the following description associated therewith.

  The embroidery sewing machine according to the present invention includes a needle plate 3, a “needle bar 7 having a needle 8 at the lower end” which is movable up and down toward the needle drop position 4 on the needle plate 3, and the needle plate 3. The presser foot 15 that can be moved up and down to press the flat tape 10 to be placed, the bobbin 26 that stores the flat tape 10 in a wound state, and the flat tape 10 that is fed out from the bobbin 26 are guided toward the needle drop position 4. In the embroidery sewing machine provided with the guide portion 33, the guide portion 33 is provided at the lower portion of the rotating member 31 provided at the outer peripheral position of the needle bar 7 and reciprocally rotatable around the needle drop position 4. In the vicinity of the needle plate 3, it can be reciprocated around the needle drop position 4 along its surface, and the shape of the guide hole 33 b of the guide portion 33 is a flat tape fed out from the bobbin 26. 10 can be guided toward the surface 47 parallel to the needle plate 3 In addition, the direction parallel to the needle plate 3 is formed widely, and the swing width dimension W of the guide portion 33 is such that the flat tape 10 sewed on the cloth 9 is alternated from the top of the needle drop position 4 to the left or right. And the timing of the rotation operation of the swing width W section of the guide portion 33 is set from the state P when the presser foot 15 is pressing the flat tape 10. In this step, the cloth presser is set to rotate while the presser foot is pressing the flat tape 10.

  Further preferably, in the zigzag stitching method of the flat tape in the present invention, the “needle bar 7 having the needle 8 at the lower end” which is movable up and down toward the needle drop position 4 on the needle plate 3 and the needle plate 3. A presser foot 15 which is movable up and down to press the flat tape 10 placed on the needle plate 3, a bobbin 26 which stores the flat tape 10 in a wound state, and a flat tape 10 fed out from the bobbin 26. In the staggered method of flat tape using an embroidery sewing machine having a guide portion 33 that is guided toward the needle drop position 4, in the embroidery sewing machine, the configuration of the guide portion 33 includes the needle bar 7 The needle drop position 4 is provided near the needle plate 3 along the surface of the rotary member 31 provided at the outer peripheral position of the needle drop position 4 so as to be reciprocally rotatable around the needle drop position 4. The guide hole 3 of the guide portion 33 is configured to be reciprocally rotatable at the center The shape of 3b is formed widely in the direction parallel to the throat plate 3 so that the flat tape 10 fed out from the bobbin 26 can be guided toward the surface 47 parallel to the throat plate 3, and zigzag stitching of the flat tape is performed. At this time, the swing width W of the guide portion 33 is operated by a dimension that allows the flat tape 10 sewn on the cloth 9 to be alternately removed from the top of the needle drop position 4 to the left or right, and The timing of the rotation operation of the swing width W section of the guide portion 33 is the same as that in the state P in which the presser foot is pressing the flat tape 10 in the next step from the state P in which the presser foot 15 is pressing the flat tape 10. What is necessary is just to make it rotate during the time.

As described above, in the present invention, when the flat tape 10 is sewed on the cloth 9 by zigzag stitching, the needle drop position 4 remains in a state where the surface of the flat tape 10 is parallel to the cloth surface 9a. Guides from the left side to the right side of the needle entry position 4 from the right and left directions to the planned flat tape sewing position, so even flat tape that is prone to hip folds can be attached flatly to the fabric surface. It has the feature that it can be stitched in a zigzag state.
This is effective in providing a high quality flat tape staggered embroidery product.

Embodiments of the present invention will be described below with reference to the drawings (FIGS. 1 to 4).
In FIG. 1, 1 is an embroidery sewing machine, 3 is a needle plate in the embroidery sewing machine 1, and 4 is a needle drop position. Reference numeral 9 denotes a cloth placed on the needle plate 3. The cloth 9 is attached to the embroidery frame 5 as is well known, and is two-dimensionally oriented in the X and Y directions on the needle plate 3 based on computer control. It is designed to move freely.

  Reference numeral 2 denotes a sewing machine arm in the sewing machine head, and 6 denotes a cylindrical guide bracket fixed to the sewing machine arm 2. Reference numeral 7 denotes a known needle bar which is provided inside the guide bracket 6 so as to be movable up and down, and is linked to a main shaft (not shown) via a known drive mechanism. Reference numeral 8 denotes a needle for sewing that is attached to the lower end of the needle bar 7 and is movable up and down toward the needle drop position 4 on the needle plate 3.

Reference numeral 16 denotes a nipple pipe which is located at the outer peripheral position of the needle bar 7 and is coaxially assembled. Reference numeral 15 denotes a presser foot which is movable up and down to press the flat tape 10 placed on the needle plate 3, and is attached to the lower end of the nipple pipe 16. Reference numeral 15a denotes a presser foot that presses the flat tape 10 from above.
Reference numeral 18 denotes a known presser foot drive means for driving the presser foot 15 up and down. In the presser foot drive means 18, 17 is a nipple ring attached to the upper end of the nipple pipe 16, 18 a is a nipple drive shaft that is driven up and down by a known drive mechanism (not shown), and 18 b has a base portion. The stroke arm is shown attached to the nipple drive shaft 18a and adapted to move up and down with the nipple drive shaft 18a. The arm portion 18c of the stroke arm 18b is engaged with the engagement groove 17a of the nipple ring 17 so that power can be transmitted in the vertical direction.
As is widely known, as the nipple drive shaft 18a moves up and down, the stroke arm 18b moves up and down, and the nipple ring 17 engaged with the stroke arm 18b and the nipple pipe 16 connected thereto also move up and down. The presser 15 can be moved up and down at a predetermined timing (see FIG. 2) with respect to the vertical movement of the needle bar 71.

Next, the presser foot rotating mechanism 20 for controlling the direction (also referred to as “direction”) so that the presser foot 15a of the presser foot 15 can always press the flat tape 10 in the lowered state will be described. .
Reference numeral 21 often shown in FIG. 1B is a drive shaft that is rotatably supported by a bearing 22. One end of the drive shaft 21 is connected to a drive shaft 23 a of a known motor 23. Reference numeral 24 a denotes a bevel gear attached to the other end of the drive shaft 21, and 24 b denotes a bevel gear attached to the outer periphery of the upper portion of the guide bracket 6 so as to be rotatable. The bevel gears 24a and 24b are engaged with each other. Reference numeral 25 denotes a locking piece (rotary guide) integrally provided on the upper surface of the bevel gear 24b, and is formed so as to protrude in the axial direction of the bevel gear 24b as can be understood from FIGS. 1 (A) and 1 (B). Yes. The front end of the locking piece 25 is engaged with a groove 16a formed long in the vertical direction on the outer periphery of the nipple pipe 16. The nipple pipe 16 is rotated with the rotation of the bevel gear 24b, so that the direction of the presser foot 15a of the presser foot 15 can be controlled.

  Reference numeral 26 denotes a bobbin that is stored in a state where a flat tape 10 as an embroidery material is wound as is well known. Reference numeral 27 denotes a bobbin support that rotatably supports the bobbin 26 and is integrally attached to the outer periphery of a rotating cylinder 44 described later.

The tape guide 30 will be described.
Reference numeral 44 denotes a rotating cylinder that can reciprocally rotate around the needle drop position 4 on the outer periphery of the guide bracket 6.
Reference numeral 31 denotes a rotating member provided on the outer periphery of the needle 8 so as to be reciprocally rotatable around the needle drop position 4. The rotating member 31 has a base portion 32 attached to the outer periphery of the rotating cylinder 44 so as to be able to reciprocate together with the rotating cylinder 44. The rotating member 31 is configured by connecting a plurality of separate members (members 31a, 31b, 31c). Reference numeral 34 denotes a long hole for adjusting the height of the guide portion 33 formed in the member 31c, and 35 denotes an adjusting screw, which can change the height of the guide portion 33 with respect to the needle plate 3. Reference numeral 36 denotes an adjusting screw. When the tape guide 30 is not used, the lower portion of the member 31c is rotated and lifted with the adjusting screw 36 as a fulcrum so that the guide portion 33 can be retracted to a high position that does not get in the way. .

Reference numeral 33 denotes a guide portion that guides the flat tape 10 fed out from the bobbin 26 toward the needle drop position 4. The guide portion 33 is provided at a lower portion of a rotating member 31 that is provided at the outer peripheral position of the needle 8 and is reciprocally rotatable around the needle drop position 4, and on the surface near the needle plate 3. Along the needle drop position 4, a reciprocating rotation is possible.
Reference numeral 33a denotes a through hole through which the flat tape 10 is inserted. Reference numeral 33b denotes a guide hole, and its shape is formed in a wide direction parallel to the needle plate 3 so that the flat tape 10 fed out from the bobbin 26 can be guided toward the surface 47 parallel to the needle plate 3. (See FIGS. 3 and 4).
The swing width W of the guide portion 33 is such that the flat tape 10 sewn on the cloth 9 is left (from the lower side in FIG. 3 (A) or the left side in FIG. 3 (B)) or right (from FIG. 3 (A) or right side in FIG. 3 (B)), and the timing of the rotation operation of the swing width W section of the guide portion 33 is determined by the presser foot. In the next step, 15 is in the state P in which the flat tape 10 is pressed, and the cloth presser is in the state P in which the flat tape 10 is pressed (see FIG. 2).
As the swing width W of the guide portion 33, for example, as can be understood from FIG. 3, when the needle is lowered toward the needle drop position 4a, the guide portion 33 is rotated to a position indicated by reference numeral 33R. Then, the flat tape 10 is removed to the right from above the needle drop position 4a on the upper surface 9a of the cloth. Next, when the cloth 9 is moved by one stitch and the needle is lowered toward the needle drop position 4b, the guide portion 33 is rotated to the position indicated by reference numeral 33L, and the flat tape 10 is moved to the cloth. The needle drop position 4b on the upper surface 9a is removed from the top to the left. As described above, the swing width W of the guide portion 33 is set such that the flat tape 10 can be alternately removed from the top of the needle drop position 4 to the left or right.

Next, the tape guide drive mechanism 40 for rotationally driving the tape guide 30 will be described.
Reference numeral 43 denotes a known motor, reference numeral 41 a denotes a pulley connected to the drive shaft 43 a of the motor 43, and reference numeral 41 b denotes a pulley connected to the rotating cylinder 44. A timing belt 42 is wound around pulleys 41a and 41b. As the motor 43 rotates, the pulley 41a, the timing belt 42, the pulley 41b, and the rotating cylinder 44 are rotated so that the tape guide 30 can be rotated together with the rotating cylinder 44.

The case where a flat tape is sewn by zigzag stitching using the above-described configuration will be described.
First, as is normally done, the bobbin 26 around which the flat tape 10 is wound, the embroidery sewing machine 1 is prepared for operation such as inserting the flat tape 10 into the through-hole 33a of the guide portion 33, and sewing work is started.
As is well known, the cloth 9 stretched on the embroidery frame 5 on the throat plate 3 operates in a two-dimensional direction of XY according to a predetermined program by an embroidery frame driving device (not shown). In synchronization with this movement, the needle 8 is moved up and down, and the presser foot 15 is moved up and down and turned.
Further, the tape guide drive mechanism 40 is operated to operate the guide portion 33 by a dimension that allows the flat tape 10 sewn on the cloth 9 to be alternately removed from the top of the needle drop position 4 to the left or right. And the timing of the rotation operation of the swing width W section of the guide portion 33 is as follows. The presser foot presses the flat tape 10 in the next step from the state P in which the presser foot 15 presses the flat tape 10. During the state P, the rotating operation is performed.

The rotation operation of the guide unit 33 will be described with reference to FIGS. 2 and 4, for example, with regard to the operation from the 15th needle to the 17th needle. 4A, 4B, and 4C show a state in which the number of stitches is moved one by one from the 15th stitch (15) to the 17th stitch (17). 4 is represented by relatively moving.
First, as the needle descends toward the 15th needle drop position 4a (see FIG. 4A), the guide portion 33 moves from the top of the needle drop position 4 to the right position (33R in FIG. 4A). (Position shown). Then, the flat tape 10 comes off from the needle drop position 4a on the upper surface 9a of the cloth.
Next, the needle falls to the needle drop position 4a on the upper surface 9a of the cloth, and a 15th stitch (15) is formed as is well known. The flat tape 10 is sewn to the cloth 9 by being pressed by the thread 11 sewn on the cloth.
Next, as the needle at the needle drop position 4a rises from the bottom dead center toward the top dead center, the guide portion 33 passes through the center position C and is located on the left side of the needle drop position 4 (FIG. 4 ( It is rotated in the direction of arrow 50 until the position indicated by 33L in B). Even in this state, the flat tape 10 is disengaged from above the needle drop position 4b on the upper surface 9a of the cloth in the same manner as described above. Next, the needle falls to the needle drop position 4b on the upper surface 9a of the cloth, forming a 16th stitch (16) as is well known. The flat tape 10 is sewn to the cloth 9 by being pressed by the thread 11 sewn on the cloth. Reference numeral 4h indicates a position where the thread 11 has been sewn.
Further, as the needle at the needle drop position 4b rises from the bottom dead center toward the top dead center, the guide portion 33 passes through the center position C and is positioned from the top of the needle drop position 4 to the right position (FIG. 4C ) To the position indicated by 33R in the direction of arrow 51. As described above, in this state, the flat tape 10 comes off from above the needle drop position 4c on the upper surface 9a of the cloth. Next, the needle falls to the needle drop position 4c on the upper surface 9a of the cloth, forming a 17th stitch (17) as is well known, and the flat tape 10 is pressed by the thread 11 sewn on the cloth. It is sewn on the cloth 9.
The flat tape 10 is sequentially sewn to the upper surface 9a of the cloth 9 by the sewing thread 11 provided on the needle as shown in FIG.
When the guide portion 33 guides the flat tape 10 from the left and right alternate directions of the needle drop position 4 toward the flat tape sewing scheduled position, as described above, the surface of the flat tape 10 is directed against the cloth surface 9a. Since the guide is kept in a state of being parallel to each other (see FIG. 3B), even a flat tape that easily breaks down can be staggered in a state where it is flatly attached to the cloth surface 9a.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic for demonstrating an embroidery sewing machine, (A) is the front view which expressed a partially broken sewing head in the embroidery sewing machine (In the figure, the tape guide was shifted about 45 degrees and displayed.) , (B) is a left sectional view of the sewing machine head partially broken (note that the presser foot and the tape guide are omitted). FIG. 3 is a diagram for explaining the relationship among the operations of a needle, a presser foot, an embroidery frame, and a tape guide in the embroidery sewing machine 1 and showing the operation of various parts during the main shaft rotating three times. The schematic diagram for demonstrating the needle drop position at the time of sewing a flat tape with a staggered stitch with respect to cloth, a flat tape, a tape guide, and a bobbin. In addition, (A) is a plan view, showing a state in which the stitch is moved by one stitch, expressed by moving the needle drop position 4 relative to the cloth 9, and (B) is (A ) Schematic diagram partially broken in the sign B direction The figure for demonstrating the operation | work which sew a flat tape on a cloth by zigzag stitching. 4A, 4B, and 4C show a state in which the number of stitches is moved one by one from the 15th stitch (15) to the 17th stitch (17). 4 is represented by relatively moving.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Embroidery sewing machine, 2 ... Sewing head, 3 ... Needle plate, 4 ... Needle drop position, 5 ... Frame, 6 ... Guide bracket, 7 ... Needle bar, 8 ... Needle, 9 ... Cloth, 9a ... Cloth upper surface, 10 ... Flat tape, 15 ... Cloth presser, 16 ... Nipple pipe, 16a ... Groove, 17 ... Nipple Ring, 18 ... cloth presser rotating means, 18a ... nipple drive shaft, 18b ... stroke arm, 20 ... cloth presser rotating mechanism, 21 ... drive shaft, 22 ... bearing, 23 ... motor, 24 ... bevel gear, 25 ... locking piece (rotary guide), 26 ... bobbin, 27 ... bobbin support, 30 ... tape guide, 31 ... times Moving member, 31a ... member, 31b ... member, 31c ... connecting member, 32 ... one end (original part), 3 ... guide portion, 33a ... through hole, 33b ... guide hole, 34 ... long hole, 35 ... adjustment screw, 36 ... screw, W ... swing width, 40. ..Tape guide drive mechanism, 41a, 41b ... pulley, 42 ... belt, 43 ... motor, 44 ... rotating cylinder, 47 ... parallel plane

Claims (2)

A needle plate,
A needle bar provided with a needle at the lower end, which is movable up and down toward the needle drop position in the needle plate;
A presser foot that is movable up and down to press the flat tape placed on the needle plate,
A bobbin for storing flat tape in a wound state;
In an embroidery sewing machine comprising a guide portion for guiding a flat tape fed out from a bobbin toward a needle drop position,
The guide portion is provided at a lower portion of a rotating member provided at an outer peripheral position of the needle bar so as to be reciprocally rotatable around a needle drop position, and close to the needle plate along the surface thereof. The guide hole of the guide portion is configured so that the flat tape fed from the bobbin can be guided in a plane parallel to the needle plate so as to be reciprocally rotatable around the needle drop position. Form a wide range of parallel directions,
Furthermore, the swing width dimension of the guide part is set to a dimension that allows the flat tape sewn on the cloth to be alternately removed from the top of the needle drop position to the left or right, and the swing of the guide part is set. The timing of the rotation operation of the width section is set so that the rotation operation is performed between the time when the presser foot is holding the flat tape and the next step when the presser foot is holding the flat tape. The embroidery sewing machine is characterized by being set to. A needle plate, a needle bar provided with a needle at the lower end, which is movable up and down toward the needle drop position on the needle plate, and a vertical tape which is placed on the needle plate are movable up and down. In a zigzag stitching method of flat tape using an embroidery sewing machine comprising a presser, a bobbin that stores the flat tape in a wound state, and a guide portion that guides the flat tape fed from the bobbin toward the needle drop position,
In the embroidery sewing machine, the configuration of the guide portion is provided at a lower portion of a rotating member provided at an outer peripheral position of the needle bar and reciprocally rotatable around a needle drop position. , And can be reciprocated around the needle drop position along its surface.
The shape of the guide hole of the guide part is formed widely in the direction parallel to the needle plate so that the flat tape fed from the bobbin can be guided toward the plane parallel to the needle plate,
When zigzag stitching flat tape, the swinging width of the guide part is operated only to the dimension that allows the flat tape sewn on the cloth to be alternately removed from the top of the needle drop position to the left or right, and The timing of the pivoting operation of the swing section of the guide section is from the time when the presser foot is pressing the flat tape to the next step when the presser foot is pressing the flat tape. A zigzag stitching method for flat tape, characterized by operating.

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