JPH0593355A - Cloth end holding system in embroidering machine - Google Patents

Abstract

PURPOSE:To accomplish favorable embroidery sewing at all times by uniformly holding both ends of a cloth, for the cloth's feed direction, between a pair of feed rollers without developing e.g. wrinkles. CONSTITUTION:Guide bodies 50 are respectively set up at the positions corresponding to both ends in the width direction of a cloth K situated between a pair of feed rollers 26 in an embroidering machine of roller traverse system; these guide bodies 50 are provided with continuous guide grooves 54 in an endless manner in the feed direction for the cloth K. Holding needles 60 movably held along these guide grooves 54 are stuck into both the ends of the cloth K, enabling the cloth to be positioned in its width direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller traverse type embroidery machine in which embroidery sewing is performed on a long fabric between a pair of feed rollers. A device for holding a part.

[0002]

2. Description of the Related Art As a material end holding device in this type of embroidery machine, for example, a technique disclosed in Japanese Patent Laid-Open No. 3-45770 can be cited. In this publication, the support plates are arranged so as to receive both ends of the fabric located between the pair of feed rollers from the lower side thereof, and the fabric ends are provided above the both support plates. An endless belt that moves while being pressed to the side is provided.

That is, both ends of the cloth are held by being sandwiched between the support plate and the belt between the feed rollers (sewn portion). Further, the lower surfaces of the front and rear reversing portions of the both belts are pressed against the feed rollers, whereby the belts move in synchronization with the rotation of the feed rollers.

[0004]

The holding force of the material edge in the holding device of the above publication depends on the frictional resistance between the belt and the material, and this frictional resistance is the feeding direction of the material (moving direction of the belt). Tends to be non-uniform. As a result of this, the fabric edge is displaced inward in the width direction due to the shrinkage of the fabric caused by sewing.

Further, due to the limit of rigidity of the feed roller,
The pressing force of the belt may be insufficient. If this pressing force is insufficient, the belt may not be synchronized with the rotation of the feed roller, which causes wrinkles on the edge of the material.

[0006] When the material edge shifts or wrinkles occur in this way, it is naturally impossible to expect good sewing.

A technical problem of the present invention is that by piercing and positioning the material end with a plurality of holding needles between a pair of feeding rollers, the holding force of the material end is made uniform in the material feeding direction, and That is, the holding needle is moved in full synchronization with the rotation of the feed roller (feeding of the material), thereby achieving good embroidery sewing.

[0008]

In order to solve the above-mentioned problems, the fabric end holding device of the embroidery machine according to the present invention is constructed as follows. That is, the fabric is set so as to be sent from the supply unit to the collection unit through the sewing unit of the embroidery machine,
In a roller traverse type embroidery machine in which feed rollers are arranged on both sides of a sewing section in the feeding direction of the cloth, and embroidery sewing is performed on the cloth between the feed rollers, the cloth positioned between the two feed rollers. Of the guide body, each of which is arranged at a position corresponding to both end portions in the width direction of the cloth, and in which a guide groove that is continuous in the end direction with respect to the cloth feeding direction is formed, and is movably assembled along these guide grooves, Moreover, it is provided with a plurality of holding needles that pierce both ends of the cloth and position the cloth in the width direction.

[0009]

According to the above construction, both ends of the cloth positioned between the feed rollers are stabbed by the plurality of holding needles, and the cloth is positioned in the width direction thereof. Then, each holding needle moves in accordance with the feeding of the cloth based on the rotation of the feeding roller.
Therefore, the material edge is always properly held by the holding needle that moves in perfect synchronization with the rotation of the feed roller, so that the embroidery sewing is performed well.

Further, since the plurality of holding needles are moved along with the feeding of the cloth, the movement locus of each holding needle by the guide groove is set so as to give tension to the cloth in the width direction thereof, for example. It can also be easily implemented.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 5 is a side view showing an outline of a sewing system using a roller traverse type embroidery machine, FIG. 6 is a front view showing the sewing system, and FIG. It is shown in a plan view. First, in FIG. 5, a supply section 30 for the cloth K is arranged on one side (back side) of the embroidery machine 10, and a collecting section 32 for the cloth K is similarly arranged on the other side (front side). The cloth K wound in a roll shape before embroidery is placed on the pair of rollers 31 in the supply unit 30, and the cloth K is sequentially sent from this to the sewing unit 12 of the embroidery machine 10. ing. The cloth K after being embroidered by the sewing section 12 passes under the operator's step 34 and is wound into a roll on the pair of rollers 33 in the collecting section 32.

Next, the structure of the sewing portion 12 of the embroidery machine 10 will be described. As is clear from FIGS. 7 and 8,
A head frame 16 is provided above the bed 14 of the embroidery machine 10.
Are arranged. The head frame 16 has a width direction (hereinafter, “X direction”) of the cloth K supplied to the sewing portion 12.
(Also referred to as a long) horizontal portion, in which a plurality of sewing heads 18 are arranged along the longitudinal direction thereof.

Roller frames 20 are attached to the left and right sides of the embroidery machine 10 so as to be movable in the X direction along rails 22 provided on the upper surface of the bed 14. These two roller frames 20 are connected to each other by tie rods 24 on both sides of the sewing section 12 in the feeding direction of the cloth K (hereinafter also referred to as “Y direction”). Further, one roller frame 20 is shown in FIGS.
The rotation of the screw rod 36 indicated by
It is designed to be moved along the line 2. The screw rod 36 is a servo motor 38 shown in FIG.
It rotates by receiving the forward and reverse drive of. Therefore, when the screw rod 36 rotates in the forward and reverse directions by driving the servo motor 38, both roller frames 20 connected by the tie rods 24 are both moved in the X direction.

Between the roller frames 20 described above, Y
The feed rollers 26 are arranged on both sides in the direction. Both of these feed rollers 26 are synchronously rotated in the same direction by the forward / reverse driving of a pulse motor 27 mounted on the roller frame 20 on one side.

Similarly, between the two roller frames 20, a tension roller 28 that rotates in contact with each of the feed rollers 26 is provided obliquely below each of the feed rollers 26.
Are arranged. Rotational forces in opposite directions are applied to these tension rollers 28 by driving an air motor (not shown) or the like.

The cloth K in the sewing portion 12 of the embroidery machine 10 has the two tie rods 2 as shown in FIG.
4 are respectively wound around and inverted downward. The cloth K after the reversal is wound around the outer circumferences of both tension rollers 28 and reversed again, and passed between the respective tension rollers 28 and the feed rollers 26 and stretched between the both feed rollers 26. ing. Then, the cloth K of the sewn portion 12 is given a tension in the Y direction by the rotational forces in the opposite directions given to the tension rollers 28, and a tension in the X direction by an expanding mechanism (not shown). It is like this.

Next, a material end holding device for holding both ends of the cloth K in the width direction (X direction) in the sewing portion 12 will be described. First of all, FIG. 1 is a partially cutaway side view of the material edge holding device, and FIG. 2 is a partially cutaway plan view of the material edge holding device. As is apparent from these drawings, the frame 40 of the material end holding device is assembled between the tie rods 24. That is, holders 42 are provided at both ends of the frame 40, and these holders 42 are joined to the tie rods 24 by tightening the respective bolts 43. The frame 40 can be slid along the tie rods 24 by loosening the bolts 43 of the holders 42.
The position can be adjusted in the width direction (X direction).

As shown in FIG. 7, the frame 40 and the respective parts that are mounted on the frame 40 and that constitute the material edge holding device are arranged at positions corresponding to both ends of the material K in the X direction. ing. However, since these configurations and their functions are the same, only one of them will be described here and the other description will be omitted.

FIG. 3 is an enlarged sectional view taken along the line AA of FIG. As is clear from this drawing, a support plate 44 is fixed to the lower surface of the frame 40 so that the end portion of the material K can be received from the lower surface between the feed rollers 26. Then, in order to lift up the cloth K so that the holding needle 60 described later can be accurately stabbed in the portion on the upper surface of the support plate 44 where the end portion of the cloth K rests, the two resin plates 46 are spaced apart from each other by the space 48. It is fixed in parallel with the opening.

A guide member 50 is arranged in parallel with the frame 40 above the resin plate 46 of the support plate 44 with an interval that allows the cloth K to pass therethrough. Brackets 52 are fixed to both ends of the guide body 50, and these brackets 52 are connected to the holders 42 by bolts 53, respectively. Therefore, the guide body 50 is also assembled between the tie rods 24.

On the outer periphery of the guide body 50, there is a guide groove 54 which is endless and continuous in the feeding direction (Y direction) of the cloth K.
Are formed. A plurality of pieces 61 are assembled in the guide groove 54 so as to be movable along the guide groove 54 and to be lined up without interruption over the entire length of the groove. As is apparent from FIG. 3 and FIG. 4, which is a perspective view showing a part of the support plate 44 and the guide body 50, the guide body 50 is formed by joining two materials such as aluminum in a combined manner. Cage, the guide groove 54
After assembling the piece 61 into the, it is integrally joined as shown in the drawing.

Each of the pieces 61 is provided with a puncture needle 62 projecting outward of the guide groove 54. When the piece 61 is located on the lower surface of the guide body 54, the piercing needle 62 pierces the end portion of the cloth K placed on the resin plate 46 from the top to the bottom to position the cloth K. That is, each piece 61 and each pricking needle 62 constitute a holding needle 60 that holds the end of the cloth K in the width direction (X direction). The holding needles 60 in the state where the end portion of the cloth K is stabbed move with the feeding operation of the cloth K.

Further, as is apparent from FIG. 1, the radius of the circular arc portion which reverses the guide groove 54 at both ends of the guide body 50 is such that the piece 61 of the holding needle 60 smoothly moves along the guide groove 54. It is set large so that you can move to. In addition, in the portion of the guide groove 54 that is located other than the lower surface of the guide body 50, the puncture needle 62 of each holding needle 60 is formed to a depth that does not project from the outer surface of the guide body 50 to ensure worker safety. ing.

Next, an outline of embroidery sewing by the embroidery machine 10 having the above structure will be described. First, by driving the pulse motor 27 forward and backward based on a control signal for embroidery, both feed rollers 26 are synchronously rotated in the same direction, as described above, and are stretched between these feed rollers 26. The cloth K being sewn is controlled to move in the Y direction.

Similarly, a servomotor 38 for driving the screw rod 36 is also driven in the forward and reverse directions based on a control signal for embroidery. As a result, both roller frames 20 move together along the rail 22, and the cloth K is controlled to move in the X direction. In this manner, in the sewing section 12 of the embroidery machine 10, the cloth K is X,
By controlling the movement in the Y direction, embroidery sewing with a predetermined pattern is performed on the cloth K.

Both ends of the cloth K in the sewn portion 12 are stabbed by the holding needle 60 at the time when the cloth K is placed on the resin plate 46 from the side of the supply portion 30 by the feeding in the Y direction, and the width direction (X direction). ) Is positioned. When the cloth K moves in the Y direction by the control for embroidering or the normal feeding, the holding needle 60 also moves along the guide groove 54 of the guide body 50 accordingly.

That is, each of the holding needles 60 moves completely in synchronization with the rotation control of the both feed rollers 26, so that the occurrence of wrinkles due to the displacement between the holding needle 60 and the end of the cloth K in the Y direction is prevented. To be done. Moreover, the holding force of these holding needles 60 at both ends of the cloth K is uniform in the Y direction, and the cloth K is prevented from shrinking due to embroidery sewing.

Embodiment 2 FIG. 8 shows a partially cutaway plan view of the material edge holding device of Embodiment 2. As is apparent from this drawing, in this embodiment, the guide groove 54 of the guide body 50 is
On the side (lower surface side), the shape is set so as to be inclined outward from the both ends toward the center in the cloth width direction (X direction). Due to the shape of the guide groove 54, the holding needle 60 after piercing the material end moves while pulling the material in the X direction, and the tension of the material at the sewing portion becomes better.

In the second embodiment shown in FIG. 8, members which are considered to have the same or equivalent constructions as those of the first embodiment are designated by the same reference numerals in the drawings, and the duplicated description will be omitted.
Further, the same concept is applied to the third embodiment described below with reference to the drawings, and a duplicate description will be omitted.

Embodiment 3 FIG. 9 shows a part of the guide body 50 in an exploded perspective view.
0 shows the guide body 50 in a plan view, and FIG. 11 shows a sectional view taken along the line BB of FIG. In these drawings, the guide body 50 is divided into three parts, that is, an intermediate member 50A and both end members 50B. The intermediate member 50A and both end members 50B are connected to each other by the hinge mechanism 70.

The hinge mechanism 70 is fixed to the intermediate member 50A of the guide body 50 and is fixed to the first hinge bracket 72 having the hinge pins 73 and both end members 50B of the guide body 50, and the hinge cylinder 75 is provided. The second hinge bracket 74 is provided as a main component.
The hinge pin 73 of the hinge bracket 72 is inserted into the hinge cylinder 75 of the other hinge bracket 74, and these axes serve as the rotation axis of the hinge mechanism 70.

A lock bolt 78 is screwed into the upper surface of the first hinge bracket 72 through an adjusting hole 76 formed in the upper surface of the second hinge bracket 74. The adjusting hole 76 has an arc shape centered on the rotation axis of the hinge mechanism 70. Therefore, if the lock bolt 78 is loosened, the intermediate member 50A and both end members 50B of the guide body 50 can be angled with the pivot axis of the hinge mechanism 70 as a fulcrum. The members 50A and 50B can be fixed at a predetermined adjustment angle.

The pivot axis of the hinge mechanism 70 is shown in FIG.
Further, as is apparent from FIG. 11, in the divided portion of the guide body 50, it is aligned with the edge portion of the groove portion guiding the small diameter portion of the piece 61 of the guide groove 54. As a result, when the intermediate member 50A and both end members 50B have an angle, both members 50A and 50B at the guide groove 54 are formed.
The gap between them can be suppressed to be small, and the piece 61 can move smoothly.

In this embodiment, similarly to the second embodiment, the guide groove 54 of the guide body 50 has an inclination angle so that the holding needle 60 after piercing the material end moves while pulling the material in the X direction. The angle can be adjusted appropriately according to the type of fabric.

[0036]

As described above, according to the present invention, since both ends of the cloth material positioned between the feed rollers are stabbed and positioned by a plurality of holding needles, the holding force of the cloth material edge is uniform in the feeding direction. In addition, since each holding needle moves in accordance with the feeding operation of the material based on the rotation of the feed roller, the shifting movement of the material due to the insufficient holding force at the material edge or the occurrence of wrinkles at the material edge is prevented. Good embroidery sewing is performed.

[Brief description of drawings]

FIG. 1 is a side view of a material edge holding device according to a first embodiment, partially cut away.

FIG. 2 is a plan view showing the material edge holding device with a part thereof cut away.

FIG. 3 is an enlarged sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view showing a part of a support plate and a guide body according to the first embodiment.

FIG. 5 is a side view showing an outline of a sewing system using a roller traverse type embroidery machine.

FIG. 6 is a front view of the embroidery machine.

FIG. 7 is a plan view showing a partially broken embroidery machine.

FIG. 8 is a plan view showing a material edge holding device of Example 2 with a part thereof cut away.

FIG. 9 is an exploded perspective view showing a part of a guide body according to a third embodiment.

FIG. 10 is a plan view showing a guide body according to the third embodiment.

11 is an enlarged sectional view taken along the line BB of FIG.

[Explanation of symbols]

 10 Embroidery machine 12 Sewing part 26 Feed roller 30 Supply part 32 Collection part 50 Guide body 54 Guide groove 60 Holding needle

Claims (1)

[Claims] 1. A fabric is set so as to be fed from a supply unit to a collecting unit via a sewing unit of an embroidery machine, and feed rollers are arranged on both sides of the sewing unit in the feeding direction of the fabric. In a roller traverse type embroidery machine in which embroidery sewing is performed on the fabric between the two feed rollers, the fabric is arranged at positions corresponding to both widthwise end portions of the fabric, and is endless with respect to the fabric feed direction. Guide body having continuous guide grooves and a plurality of holding members that are movably assembled along these guide grooves and that pierce both ends of the dough and position the dough in the width direction. A fabric edge holding device for an embroidery machine equipped with a needle.