JP2758214B2 - Embroidery sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention sequentially performs embroidery sewing on a long base cloth transferred from a supply section to a collection section via a sewing section. It relates to a type of sewing machine.

[Prior Art] In this type of embroidery sewing machine, feed rollers are arranged on both sides of a needle base in the direction of transport of the base cloth at the sewing portion, and the base cloth is stretched between the feed rollers. . The base cloth fed into the sewing section (between the both feed rollers) is provided with an expansion in the width direction and a tension in the transfer direction so that embroidery sewing is properly performed.

[Problems to be Solved by the Invention] In the sewing portion of the sewing machine, since the embroidery sewing is performed with a large number of sewing needles, the base fabric shrinks in the width direction. This causes deformation of the embroidery pattern, that is, pattern shift.

[Means for Solving the Problems] In order to solve the problems, the embroidery sewing machine of the present invention is configured as follows.

That is, the base fabric is set so as to be transferred from the supply section to the collection section via the sewing machine sewing section, and feed rollers are respectively arranged on both sides of the needle base in the sewing machine sewing section in the transfer direction of the base cloth. In the embroidery sewing machine that is stretched between the two feed rollers, the base cloth at the portion is near the respective roller ends of the two feed rollers, and at the left and right sides where the cloth ends of the base cloth are located. , Each of which is provided with a cloth presser mechanism.

The two fabric presser mechanisms are arranged rotatably so as to be close to the upper portions of the two feed rollers, and a support plate for receiving the fabric ends on both sides in the width direction of the base cloth located between the two feed rollers from below. A pair of belt wheels, and a belt that is moved between the two belt wheels while pressing the cloth edge on the support plate against the support plate.

[Operation] According to the above configuration, the fabric ends on both sides in the width direction of the base fabric in the sewing portion of the sewing machine are located between the support plate and the belt of the fabric holding mechanism. Therefore, the base fabric is
The cloth edge is conveyed while being pressed against the support plate side by the belt, so that shrinkage in the width direction of the base cloth is prevented regardless of embroidery at the sewing portion.

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 5 is a schematic view of a sewing system in an embroidery sewing machine, and FIG. 6 is a partially enlarged plan view of FIG.

First, as apparent from FIG. 5, the embroidery sewing machine
On the right side of the drawing of FIG. 20, a base cloth K such as a raw cloth before being sewn,
A supply section 10 for supplying the sewing section 22 of the embroidery sewing machine 20 is provided, and a recovery section 12 for recovering the sewn base fabric K is provided on the left side of the drawing. In the supply section 10, the base cloth K on the roll is placed on the rollers 11 arranged in two rows, and
The base fabric K can be sequentially supplied to the main body. The base fabric K after the embroidery sewing is performed in the sewing portion 22 of the sewing machine.
Are collected in a roll shape sequentially on rollers 13 arranged in two rows of the collecting section 12 under the step 14 for the operator.

As for the sewing part 22, a head frame 28 is provided on the bed 24 as is apparent from FIG.
In a horizontal portion of the head frame 28, a plurality (not shown) of sewing machine heads 30 shown in FIG. 5 are arranged. On the bed 24, each of the sewing heads 30
A hook base 32 is disposed at a lower position such as a needle 31 and a cloth presser (not shown).

A drive shaft (not shown) for transmitting a driving force to each of the sewing machine heads 30 and a drive shaft (not shown) of the shuttle in the shuttle base 32 are both the same drive source (motor).
It is well known that they are driven in synchronization with each other.

A pair of rails 26 are provided on the upper surface of the bed 24, respectively. Roller frames 34 are roughened on these rails 26 at both upper and lower sides in FIG.

The two roller frames 34 are connected to each other by a guide bar 36 at each of a supply side A facing the supply section 10 and a collection side B facing the collection section 12 in the sewing section 22. This allows both roller frames
34 move along the rail 26 in an integral relationship with each other.

A feed roller 40 is rotatably supported between the two roller frames 34 on both sides of the needle base T shown in FIG. 6, that is, on the supply side A and the recovery side B. Both feed rollers 40 are synchronously rotated in the same direction by driving a reversible motor (not shown) mounted on the roller frame 34.

In addition, a tension roller 48 is provided at a predetermined interval with respect to each feed roller 40 at a lower position on the outer side of both feed rollers 40. Further, near the tension rollers 48, nip rollers 49 that rotate in contact with the outer periphery of each tension roller 48 are provided. The base cloth K is wound around the outer periphery of the guide bar 36, passes between the tension roller 48 and the nip roller 49, is wound around the outer periphery of the tension roller 48, is turned over, and is further wound around the outer periphery of the feed roller 40. Wrapped around and inverted. Thus, the base fabric K is stretched between the two feed rollers 40 (see FIG. 5).

As shown by arrows in FIG. 5, rotational forces in directions opposite to each other are applied to the tension rollers 48 by a rotational force of an air motor or the like (not shown). Due to the rotational force of these tension rollers 48, the tension in the transport direction is applied to the base cloth K between the two feed rollers 40.

Further, the base fabric K supplied to the sewing portion 22 is expanded in the width direction by an expanding mechanism (not shown).

Now, as shown in FIG.
40 near the roller end (the roller frame 34
6), a cloth holding mechanism 50 is disposed at a position where the cloth end of the base cloth K is located, that is, at two upper and lower positions in FIG. The structure of the presser mechanism 50 will now be described with reference to FIGS. The presser mechanism 50 has exactly the same configuration for each of the upper and lower parts of FIG.
Only 50 will be described.

FIG. 1 shows a presser foot mechanism 50 arranged below FIG.
2 is an enlarged plan view, FIG. 2 is a front view of FIG. 1, and FIG. 3 is an enlarged sectional view taken along the line III-III of FIG.

First, in FIGS. 1 to 3, the frame 52 of the presser mechanism 50 has a length sufficient to be bridged between the guide bars 36, and has a holder 54 at both ends.
Are fixed respectively. Each of these holders 54 is mounted on the guide bar 36 so as to be slidable in the longitudinal direction (the width direction of the base cloth), and is adjusted to a position corresponding to the cloth width of the base cloth K. It is fixed to the guide bar 36 by tightening 55. As a result, the frame 52 is assembled on the embroidery sewing machine 20 side.

A support plate projecting rightward in FIG. 3 between the feed rollers 40 is provided on the lower surface of the frame 52.
56 is fixed. The support plate 56 is located between the two feed rollers 40 so as to receive the cloth end of the base cloth K from below, and has a tape or the like on its upper surface to make the base cloth K slippery ( (Not shown).

The wheel frame 58 is arranged along the frame 52, and is attached to both ends thereof so as to be adjustable in the vertical direction in FIGS. 2 and 3 with respect to the holders 54. That is, elongated holes 59 extending vertically in FIGS. 2 and 3 are formed at both ends of the wheel frame 58, respectively. Then, adjustment bolts 60 are tightened to the holder 54 through the respective elongated holes 59, whereby both ends of the wheel frame 58 are attached to the holder 54.

As shown in FIG. 2, the wheel frame
A shaft 63 of, for example, a belt wheel 62 for a timing belt is fixed to 58 at a position close to the upper part of each of the two feed rollers 40. Both belt wheels 62 are rotatably supported on respective shafts 63. The wheel frame 58 has both belt wheels 62
A plate 64 extending in the same direction parallel to the support plate 56 is fixed between the support plate 56 and an upper position at a predetermined distance from the support plate 56.

For example, a timing belt 70 is stretched between the two belt wheels 62 so as to reciprocate as the belt wheels 62 rotate. On the outer surface of the belt 70, two rows of adhesive members 72 that are continuous in the longitudinal direction of the belt 70 are attached. The adhesive member 72 is located at a position near the uppermost portion of the feed roller 40.
The same movement as the base fabric K is performed by pressing against the base fabric K on the outer periphery. The adhesive member 72 is made of a material such as polyurethane or butyl rubber, and has a property of not slipping when it comes into contact with the base fabric K.

As is apparent from FIG. 4 in which the main structure of FIG. 2 is schematically shown, each belt wheel 62 is wound around the outer circumference of both belt wheels 62 in the belt 70.
The portion turned upside down is guided to pass between the support plate 56 and the plate 64. Moreover, the adhesive member 72 at the portion passing between the support plate 56 and the plate 64 is, as is clear from FIG. 2, a cloth end of the base cloth K on the support plate 56 (not shown). ) Is pressed against the support plate 56 side.

As shown in FIG. 3, on the lower surface of the plate 64, a belt 70 that presses the cloth end of the base cloth K toward the support plate 56 by the adhesive member 72 is provided with a base cloth by embroidery. A guide member 65 is provided to prevent the K from being pulled toward the center of the sewn portion 22 by the contraction of the K. Also, on the lower surface of the plate 64, the plate 64
A cushion 67 is fixed in a state where the cushion 67 is in contact with a belt 70 passing between the support plate 56 and a tape or the like which makes the belt 70 slippery. No) is affixed.

A case 66 is fixed to the plate 64 so as to cover each of the belt wheels 62 and the portion of the belt 70 wound around the belt wheels 62 on both the left and right sides in FIGS. A belt roller 68 is rotatably provided on the side wall of the case 66 at a position at a predetermined distance from each of the belt wheels 62 inside the two cases 66. Each of the belt rollers 68 comes into contact with the outer surface of the belt 70 between the adhesive members 72 to give tension to the belt 70.

Next, an outline of a sewing operation in the embroidery sewing machine 20 having the above configuration will be described.

As described above, the base cloth K is sent out from the supply section 10 shown in FIG. 5 to the sewing section 22 where predetermined embroidery is performed.
Are collected sequentially. The base fabric K at the sewing portion 22 is provided with tension in the transport direction and expansion in the width direction between the two feed rollers 40 as described above. Both feed rollers 40 are synchronously rotated in the same direction by forward and reverse rotation of a motor (not shown) based on a control signal for embroidery. Thereby, the movement of the base fabric K in the sewing section 22 is controlled in the transfer direction.

Similarly, the roller frame 34 moves in the vertical direction in FIG. 6 along the rail 26 of the bed 24 based on a control signal for embroidery, whereby the movement of the base fabric K is controlled in its width direction.

By controlling the movement of the base fabric K in the transfer direction and the width direction in the sewing section 22 in this manner, each of the sewing heads is controlled.
The movement of the base cloth K with respect to the 30 needles 31 can be controlled to a position corresponding to the embroidery pattern. As a result, a predetermined embroidery pattern is sewn on the base fabric K.

Now, the base fabric K in the sewing machine sewing section 22 has the fabric ends on both sides in the width direction between the support plate 56 in the fabric holding mechanism 50 and the adhesive member 72 of the belt 70, and moves toward the support plate 56 side. Pressed. And this adhesive member
Sliding hardly occurs between 72 and the base fabric K. Therefore, at the time of transfer of the base cloth K in accordance with embroidery sewing control or normal feed control, the cloth end of the base cloth K slides along the support plate 56, and the belt 70 is moved through the adhesive member 72. The base fabric K moves together with the base fabric K while being pressed against the support plate 56 side. Therefore, the sewing section
Regardless of the embroidery at 22, the base fabric K is prevented from shrinking in the width direction.

[Effects of the Invention] In the present invention, since the fabric edges on both sides in the width direction of the base fabric in the sewing portion of the sewing machine are held in a state pressed against the support plate by the belt of the fabric holding mechanism, Irrespective of embroidery at the sewn portion, shrinkage in the width direction of the base cloth is prevented, and deformation of the embroidery pattern is avoided.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a plan view of a presser mechanism in an embroidery sewing machine, FIG. 2 is a front view of the presser mechanism, and FIG. 3 is an enlarged view of line III-III in FIG. Sectional view,
FIG. 4 is a schematic diagram showing only the main components in FIG. 2,
FIG. 5 is a schematic view of an embroidery sewing machine, and FIG. 6 is a partial plan view of FIG. 10 supply section 12 collection section 22 sewing machine sewing section 40 feed roller 50 cloth holding mechanism 56 support plate 70 belt 72 adhesive member

Claims (1)

(57) [Claims] 1. A base cloth is set so as to be transferred from a supply section thereof to a collecting section via a sewing section, and feed rollers are respectively arranged on both sides of a needle in the sewing direction of the base cloth in the transfer direction of the base cloth. The base cloth at the sewing portion is an embroidery sewing machine that is stretched between the two feed rollers, and the right and left sides of the base cloth where the cloth ends are located near the respective roller ends of the two feed rollers. A cloth presser mechanism is disposed at each of both sides, and these cloth presser mechanisms each include a support plate that receives the cloth ends on both sides in the width direction of the base cloth positioned between the feed rollers from below, and a double feed mechanism. A pair of belt wheels rotatably arranged close to the upper part of the roller, and a cloth end that is hung between the two belt wheels and on the support plate was pressed against the support plate side. Embroidery sewing machine constituted by a belt moving at state.