JPH0129903B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a multi-head embroidery sewing machine that is particularly applied when embroidering and embroidering long pieces of fabric.

[Prior Art] As a conventional technology, there is, for example, Japanese Unexamined Patent Publication No. 197364/1983.

[Problem to be solved by the invention] A long piece of cloth is stretched between a pair of feed rollers, and the transfer is controlled in the XY-axis direction by the rotational movement of both feed rollers and the movement movement in the axial direction. When stitching fabric, there is a problem in that the mechanism for driving and controlling both feed rollers in the axial direction and the mechanism for spreading the fabric in the width direction are complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a needle stitch sewing machine that can avoid the above-mentioned problems.

[Means for Solving the Problems] The multi-head embroidery sewing machine of the present invention includes a plurality of sewing machine heads arranged in a horizontal line and each equipped with a sewing needle, and the above-mentioned sewing machine head which cooperates with the sewing needles to form a stitch. A plurality of sewing tables disposed below each sewing machine head are each attached to a movable frame installed movably in the arrangement direction of the sewing machine heads with respect to the bed. A pair of feed rollers, each horizontally suspended along the arrangement direction of the sewing machine heads, are disposed in parallel so as to be co-rotatable in order to expand the stitching area and control the transfer in the lengthwise direction of the fabric. a first control motor that is rotationally driven to control the movement of the sewing machine head and the sewing table in the width direction of the fabric in accordance with the lateral component of the stitching pattern; The feed rollers are rotationally driven in synchronization with the first control motor in order to control the forward and reverse rotation of the two feed rollers to control the transfer of the embroidery area in the longitudinal direction of the fabric in accordance with the longitudinal component of the embroidery pattern. It has a configuration in which a second control motor is provided.

[Function] A plurality of sewing machine heads arranged in a horizontal row,
A movable frame, on which a plurality of sewing tables disposed below each sewing machine head are respectively attached, is controlled to move forward and backward in the arrangement direction of the sewing machine heads by a first control motor, so that each of the sewing machine heads and each sewing table can be moved forward and backward in the arrangement direction of the sewing machine heads. At the same time, a second control motor controls the movement of the sewing table in the cloth width direction in accordance with the lateral component of the stitching pattern, and at the same time controls a pair of feed rollers that are horizontally suspended in parallel along the arrangement direction of the sewing machine heads. By controlling rotation in forward and reverse directions, the stitching area of the fabric is controlled to be transferred in a stretched state in the cloth length direction in accordance with the longitudinal component of the stitching pattern, and the stitching pattern is sewn in the stitching area.

[Effects of the Invention] Since the present invention is configured as described above, it is possible to accurately sew the embroidery pattern in the embroidery area, and there is no need for a mechanism to control the transfer of the fabric in the width direction of the fabric. As a result, the drive mechanism for stitching can be simplified.

In particular, when the stitching area is shifted in the width direction of the fabric, the expansion state of the stitching area changes and the stitching pattern is deformed. Since the sewing area is not displaced in the cloth width direction, the sewn embroidery pattern can be made more accurate.

In addition, it is possible to integrally control the movement of each sewing machine head and each sewing table to eliminate deviations in the relative positions of each sewing machine head and each sewing table. It is possible to eliminate incorrect sewing operations that occur due to shifts in travel distance or startup timing when movement is controlled by the sewing machine. It can be carried out appropriately.

[Example] Next, an example of the present invention will be described with reference to the drawings.

In a multi-head embroidery sewing machine for stitching a long piece of fabric N, there is a head support base 2 formed in an oblong shape along the longitudinal direction of the bed 1 near the rear end of the oblong bed 1. An appropriate number of upper guide members 3 having front-open slide grooves 3a are attached to the front side of the upper end of the head support base 2 at a distance from each other in the lateral direction. Near the center, an appropriate number of lower guide members 4 having upwardly open slide grooves 4a are attached at a distance in the lateral direction.

A movable frame 6 installed on the bed 1 so as to be movable in the lateral direction has an upper plate 6a horizontally installed to horizontally slideably engage the slide groove 3a of each upper guide member 3, and each lower plate 6a. A horizontally installed lower plate 6b for slidably engaging with the slide groove 4a of the guide member 4, and left and right vertical frame portions 6c connected vertically to both ends of the upper and lower plates 6a, 6b, respectively. 6c are assembled to form a horizontally long shape. A plurality of sewing machine heads 5 to 5 are mounted on the front side of the upper plate 6a of the movable frame 6 and arranged in a horizontal row at equal intervals, while on the lower plate 6b, a plurality of sewing machine heads 5 to 5 are arranged directly below each sewing machine head 5. Sewing tables 7 to 7 each have a sewing mechanism for forming stitches in cooperation with the sewing needle 9 of each sewing machine head 5.
A slide case 8 is attached to the front end of each sewing machine head 5 so as to be horizontally slidable.
Each slide case 8 has an appropriate number of sewing needles 9.
is vertically supported so that it can be moved vertically.

The sewing needles 9 are arranged in parallel in front and behind a horizontal linear needle drop line a connecting each needle drop H to H passing through the stitching area N1 of the fabric N1, and are arranged horizontally parallel to the needle drop line a. A pair of suspended front and rear feed rollers 12,
Reference numerals 12 and 12 correspond to feed roller supports 13 to 13 installed near both ends of the bed 1, respectively, in order to spread out the stitching area N1 of the fabric N and control its transfer in the fabric length direction perpendicular to the needle drop line a. Rotatably supported.

Drive stand 1 installed on the right end of the bed 1 in the illustration
A first control motor 15 that is rotationally driven based on a signal corresponding to the vertical component of the embroidery pattern is attached to the front end of the embroidery pattern. The transmission is transmitted to both feed rollers 12 via a belt 19 mounted thereon, and both feed rollers 12 co-rotate in the same direction by the forward and reverse rotation of the first control motor 15.
The embroidery area N1 of the stretched fabric N is controlled to be transferred in the longitudinal direction of the fabric in accordance with the longitudinal component of the embroidery pattern.

Near the rear end of the drive base 14 is a second control motor 2 which is driven to rotate in synchronization with the first control motor 15 based on a signal corresponding to the horizontal component of the embroidery pattern.
A screw shaft 21 directly connected to the motor shaft of the second control motor 20 is screwed into a screw cylinder 22 attached to a vertical frame on one side of the movable frame 6. Screw shaft 2 with forward and reverse rotation of 20
1 rotates in forward and reverse directions, and the movable frame 6 is controlled to move forward and backward in a direction parallel to the needle drop line a, so that each sewing machine head 5
Each sewing table 7 is integrally controlled to move in the cloth width direction in synchronization with the transfer of the stitching stitch N1 in the cloth length direction due to the rotation of both feed rollers 12. Both feed rollers 1 for transporting the stitching area N1 of the fabric N in the fabric length direction by the synchronous rotation of both control motors 15 and 20.
2 and the forward and backward movement of the movable frame 6 for moving each sewing machine head 5 and each sewing table 7 in the cloth width direction are repeated for each vertical movement of the sewing needle 9, and the stitching is completed. The sewing area N1, each sewing machine head 5, and each sewing table 7 are intermittently displaced in the cloth length direction and cloth width direction corresponding to the vertical and horizontal components of the embroidery pattern, respectively, to perform the embroidery sewing. A predetermined embroidery pattern can be sewn in the area N1.

The main shaft 23 of the sewing machine passes through each sewing machine head 5 and is horizontally mounted in a rotatable manner, and the main shaft 23 of the sewing machine includes a drive shaft which is rotatably driven by a motor (not shown) and is mounted horizontally and rotatably through each sewing table 7. The rotation of 24 is transmitted via belt 25.

Next, the left and right sides and effects of the embodiment with the above-mentioned horizontal structure will be explained.

In this example, when sewing the sewing area N1 of a long piece of fabric N, a plurality of sewing machine heads 5 are arranged in a row horizontally, and a plurality of sewing machine heads 5 are arranged below each of the sewing machine heads 5. The movable frame 6 to which the sewing machine table 7 is attached is controlled to move forward and backward in the direction in which the sewing machine heads 5 are arranged by the first control motor 15, thereby stitching each of the sewing machine heads 5 and the sewing table 7 in the lateral direction component of the pattern. At the same time, the second control motor 20 controls the forward and reverse rotation of a pair of feed rollers 12, which are horizontally suspended in parallel along the arrangement direction of the sewing machine heads 5. N embroidery areas N1 are controlled to be transferred in a stretched state in the cloth length direction in accordance with the longitudinal component of the embroidery pattern.

Therefore, it is possible to accurately sew the embroidery pattern in the embroidery area N1, and there is no need for a mechanism to control the transfer of the fabric N in the width direction of the fabric, so that the drive mechanism for embroidery can be easily sewn. It can be simplified.

In particular, when the embroidery sewing area N1 is displaced in the cloth width direction, the expansion state of the embroidery sewing area changes, causing a problem in which the embroidery pattern is deformed. Since the embroidery area N1 is not displaced in the cloth width direction, the sewn embroidery pattern can be made more accurate.

In addition, each sewing machine head 5 and each sewing table 7 are integrally controlled to move each sewing machine head 5 and each sewing table 7.
This eliminates deviations in the relative position between the sewing machine head 5 and the sewing table 7, which would otherwise occur due to deviations in movement distance or startup timing when the movement of the sewing machine head 5 and sewing table 7 is controlled by separate drive systems. Unauthorized sewing operations can be eliminated, and the cooperative sewing operations between each sewing machine head 5 and each sewing table 7 can be performed properly at all times.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the main parts, Fig. 2 is a plan view of a multi-head embroidery sewing machine, Fig. 3 is a front view, and Fig. 4 is a front view. FIG. 4 is an enlarged sectional view taken along the line X-X in FIG. 3; 1... Bed, 5... Sewing machine head, 6... Movable frame, 7... Sewing table, 9... Sewing needle, 12...
...Feed roller, 15...First control motor, 20...
...Second control motor, N...Fabric, N1...Stitching area.

Claims (1)

[Claims] 1 A plurality of sewing machine heads arranged in a horizontal line and each equipped with a sewing needle, and a plurality of sewing tables disposed below each of the sewing machine heads to form stitches in cooperation with the sewing needles. , are respectively attached to movable frames installed on the bed so as to be movable in the direction in which the sewing machine heads are arranged, and on the bed to spread out the embroidery area of the fabric and control its transfer in the longitudinal direction of the fabric. A pair of feed rollers, each horizontally suspended along the arrangement direction of the sewing machine heads, are arranged in parallel so as to be able to rotate together, and the movable frame is controlled to move forward and backward in the lateral direction to move each of the sewing machine heads and each of the sewing machines. A first control motor is rotatably driven to control the movement of the table in the cloth width direction in response to the lateral component of the embroidery pattern, and a first control motor is rotatably driven to control the movement of the base in the cloth width direction in response to the lateral component of the embroidery pattern, and the two feed rollers are controlled to rotate in forward and reverse directions to control the embroidery area. A multi-head embroidery machine comprising a second control motor that is driven to rotate in synchronization with the first control motor in order to control the transfer in the longitudinal direction of the cloth in accordance with the longitudinal component of the embroidery pattern. Sewing machine.