JP2878937B2 - Automatic sewing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sewing apparatus for running a continuous cloth such as a towel cloth in one direction, bending both side edges thereof, and sewing the sewing machine along the bent portion.

[0002]

2. Description of the Related Art In general, in the production of towels, both sides are bent inward while running a continuous cloth having a constant pattern in one direction to form an edge winding, and the edge winding is formed by a pair of sewing machines. And the continuous fabric is cut between the patterns.

[0003] Here, the formation of the rim winding and the sewing of the rim winding are performed by an automatic sewing device. The automatic sewing device has a pair of trumpet-shaped curling guides, passes both side edges of the continuous cloth in the curling guide, forms curls on both sides of the continuous cloth, and has an outlet side of each curling guide. A sewing machine is provided in the sewing machine.

[0004]

Some continuous fabrics have a band-shaped thick portion extending in the width direction of the continuous fabric in one pattern corresponding to one towel. In such continuous dough, if an attempt is made to form a curled portion on a thick portion with a curling guide, the thick portion escapes in the width direction of the continuous dough due to contact with the curling guide. It was not possible to form an edge winding, and it was not possible to obtain a good product having a uniform width in a conventional automatic sewing device.

[0005] An object of the present invention is to make it possible to form an edge-wrap on both sides of a continuous fabric reliably over the entire length thereof even when a continuous belt has a thick band-like portion. It is an object of the present invention to provide a sewing device capable of obtaining a good product of the above.

[0006]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, a continuous cloth is run in one direction, and both side edges are bent by a pair of edge winding guides. An automatic sewing apparatus for sewing the curly winding by a pair of sewing machines, comprising: a sensor provided on a continuous fabric traveling path leading to the curling guide to detect a thick portion of the continuous fabric; and an entrance of the curling guide. A pair of tension roller mechanisms for applying a tension in the width direction to the continuous dough on the side, and a tension signal based on a detection signal input from the sensor.
Activate the roller mechanism so that both sides of the thick part
Tension roller mechanism until it passes through the curling guide
Control means for maintaining the tension in the operating state,
Roller mechanism is inclined with respect to the running direction of the continuous dough.
And a pair of fixed rollers
The movable roller that holds the continuous fabric and the movable roller
A driving device for moving the roller relative to the fixed roller.
Moving device is controlled by the control means.
The configuration is adopted.

[0007]

Further, in order to solve the above-mentioned problem, a second
In the invention of the present invention, each of the wrapping guide, the sewing machine and the tension roller mechanism provided on both sides of the continuous dough are supported by a pair of movable tables movably supported in the width direction of the continuous dough, and the movable tables are Moving means for moving in the width direction is provided.

[0009]

In the sewing apparatus according to the first aspect of the invention, the sensor detects a thick portion of the continuous cloth, and when the thick portion moves to a position just before entering the curling guide, the movable roller moves toward the fixed roller. It moves to apply tension in the width direction to the continuous dough. By applying the tension, the thick portion is prevented from escaping inward, and the thick portion passes through the curling guide to form curling on both sides of the band-shaped thick portion, and the curling is sewn by the sewing machine. Is done.

In the sewing apparatus according to the second invention, when the continuous cloth moves to a position just before the continuous cloth enters the curling guide, the tension roller mechanism applies the tension to the continuous cloth in the width direction substantially simultaneously with the pair of movable cloths. The platform moves inward. For this reason, the thick portion is prevented from escaping inward as in the first invention, and furthermore, due to the inward movement of the movable base, there is a margin for bending on both sides of the continuous fabric, and the edge winding guide is provided. As a result, it is possible to reliably form the rim winding on both sides of the thick portion.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 6 show a first embodiment of the automatic sewing apparatus according to the present invention.

As shown in FIG. 1 to FIG. 3, the continuous dough A, which is guided by the first guide bar 1 and the second guide bar 2, is provided in the transfer path as shown in FIG.
And a pair of left and right trumpet-shaped edge winding guides 3, 3 which are formed by bending both side edges inward to form an edge winding a. Further, a pair of left and right sewing machines 4 and 4 for sewing edge windings a on both sides of the continuous cloth A are provided downstream of the edge winding guides 3 and 3.

A measuring roller 5 is provided on one side of the first guide bar 1.
Is provided. This measuring roller 5 rotates by contact with the continuous cloth A passing between the first guide bar 1 and
The number of rotations is measured by an encoder 6 provided coaxially with the measurement roller 5 to measure the moving amount of the continuous dough A.

At a position close to the measuring roller 5, a sensor 7 for detecting the thick portion b of the continuous cloth A is provided. As the sensor 7, a light reflection type sensor is used, and when the sensor 7 detects the thick portion b, the encoder 6 starts measurement.

Instead of the light reflection type sensor 7 as described above, a measuring roller 5 is provided movably with respect to the first guide bar 1 in accordance with a change in the thickness of the continuous cloth A. A sensor configured to detect the movement of the target by a differential transformer, a piezoelectric element, or the like may be used.

A pair of cloth guides 8 are provided upstream of the pair of edge winding guides 3. The cloth guide 8 is formed of a plate, is arranged in an inclined manner with a downward scent toward the tip, and presses both sides of the continuous cloth A downward.

Each of the pair of cloth guides 8 is provided with a tension roller mechanism 10 for tensioning the continuous cloth A in the width direction.

As shown in FIGS. 3 and 4, the tension roller mechanism 10 includes a bracket 11 on the lower surface of the cloth guide 8.
And a pair of fixed rollers 1
2 and 12 are rotatably supported. Further, a movable roller 13 is provided below the pair of fixed rollers 12, 12, and an L-shaped roller arm 14 that rotatably supports the movable roller 13 is moved up and down by the operation of a cylinder 15 to move the movable roller 13 to a pair. Are moved with respect to the fixed rollers 12, 12.

Here, the fixed roller 12 and the movable roller 13
Are inclined with respect to the running direction of the continuous dough A, and when the movable roller 13 is received by the fixed roller 12 and moves to clamp the continuous dough A between the two rollers 12, 13, the two rollers 12, 13 Rotates in contact with the continuous dough A and feeds both sides of the continuous dough A in an obliquely outward direction to impart a tension in the width direction to the continuous dough A.

The cylinder 15 keeps the movable roller 13 in contact with the fixed roller 12 while the thick portion b of the continuous cloth A passes through the curling guide 3.

That is, the distance between the sensor 7 for detecting the thick portion b of the continuous cloth A and the curling guide 3 can be known in advance, while the movement amount of the thick portion b is determined by the
, The sensor 7 and the rim guide 3
When the distance between the thick portions b detected by the encoder 6 matches the set value, the cylinder 15 is actuated by a control device (not shown) to bring the movable roller 13 into contact with the fixed roller 12. When the rear end of the thick portion b passes through the curling guide 3, the movable roller 13 is separated from the fixed roller 12.

Now, when the continuous cloth A is run in the direction of the arrow in FIG. 2, when the both side edges of the continuous cloth A pass through the curling guide 3, as shown in FIG. The winding a is formed, and the edge winding a is sewn by the sewing machine 4.

The band-shaped thick portion b provided on the continuous fabric A
Passes between the first roller and the measurement roller 5 and the sensor 7 detects the thick portion b, the encoder 6 turns the thick portion b
The measurement of the movement amount of is started. When the moving amount matches the set value, the cylinder 15 operates to move the movable roller 13 toward the fixed roller 12. For this reason, both sides of the continuous fabric A are sandwiched between the fixed roller 12 and the movable roller 13 as shown in FIG.

Each of the fixed roller 12 and the movable roller 13 is rotated by contact with the continuous fabric A. At this time, since the fixed roller 12 and the movable roller 13 are inclined with respect to the running direction of the continuous dough A, both sides of the continuous dough A are sent obliquely outward by the fixed roller 12 and the movable roller 13, The cloth A is given a tension in the width direction.

For this reason, when both side edges of the thick portion b of the continuous dough A are bent inward by the curling guide 3, the thick portion b moves inward due to the tension in the width direction applied to the continuous dough A. Is prevented, and the curl a is formed on both side edges by the curl guide 3.

When the thick portion b passes through the curling guide 3, the movable roller 13 is separated from the fixed roller 12 by the action of the cylinder 15.

When the fixed roller 12 and the movable roller 13 are always kept in contact with each other, the thin portion of the continuous fabric A is formed in a state where the thin portion of the continuous fabric A is stretched in the width direction, and the edge winding a is formed. Since the thin portion shrinks in the width direction after the winding a is sewn, the widths of the thin portion and the thick portion are different,
A product having a uniform width cannot be obtained.

FIG. 7 shows a second embodiment of the automatic sewing apparatus according to the present invention. In this embodiment, the continuous dough A
Each of the edge winding guide 3, the sewing machine 4, and the tension roller mechanism 10 disposed on both sides of the continuous cloth A is supported by a movable base 20, and the movable base 20 is supported by a guide shaft 21 and a guide rail 22 extending in the width direction of the continuous cloth A. It is movably supported.

Further, the movable table 20 is moved in the width direction of the continuous cloth A by the rotation of the screw shaft 24 rotated by the driving of the motor 23.

Here, the motor 23 operates substantially simultaneously with the operation of the cylinder 15 of the tension roller mechanism 10 to slightly move the movable table 20 inward of the continuous cloth A.

Since the other structure is the same as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

In the sewing apparatus shown in the second embodiment, the tension roller mechanism 10 clamps both sides of the continuous cloth A and shortly before the thick portion b of the continuous cloth A enters the curling guide 3. To give a tension in the width direction. At approximately the same time when the tension roller mechanism 10 operates, the movable base 20 moves inward by the driving of the motor 23.

As described above, the tension roller mechanism 10
By moving the movable base 20 inward at substantially the same time as the operation of the above, the thick portion b is prevented from escaping inward, and a margin for bending is formed on both sides, and the thick portion b is The edge winding a can be reliably formed on both sides of the portion b.

[0035]

As described above, according to the present invention, when both side edges of the thick portion of the continuous fabric are bent inward by the curling guide, the continuous fabric is formed by the fixed roller and the movable roller.
Since the tension is applied in the width direction to the continuous fabric by sandwiching, it is possible to reliably form the rim winding on both side edges of the thick portion, and to obtain a good product having a uniform width dimension over the entire length. .

Also, as in the second invention, the sewing machine, the edge winding guide, and the tension roller are moved inward at substantially the same time as the tension roller mechanism applies the tension in the width direction to the continuous fabric, thereby increasing the thickness. It is possible to more reliably form the rim winding on both sides of the portion.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing a first embodiment of an automatic sewing apparatus according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a partially cutaway plan view showing a part of FIG. 1 in an enlarged manner;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a cross-sectional view illustrating a state in which the tension roller mechanism applies tension to the continuous fabric in the width direction.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is a longitudinal sectional front view showing a second embodiment of the automatic sewing apparatus according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 3 curling guide 4 sewing machine 7 sensor 10 tension roller mechanism 12 fixed roller 13 movable roller A continuous cloth a curling b thick part

Claims (2)

(57) [Claims] 1. While running a continuous dough in one direction, both sides are bent by a pair of edge winding guides to form an edge winding,
An automatic sewing device for sewing the curly winding by a pair of sewing machines, comprising: a sensor provided on a continuous cloth running path leading to the curling guide to detect a thick portion of the continuous cloth; and a continuous cloth at an entrance side of the curling guide. a pair of tension roller mechanism to impart the width direction of the tension, the sensor
The tension roller mechanism by the detection signal input from
Activate so that both side edges of the thick part pass through the winding guide
Until the tension roller mechanism is in operation.
Control means, wherein the tension roller mechanism comprises:
A pair of skewed cloth
A fixed roller and the fixed roller sandwich the continuous fabric
Move the movable roller and the movable roller with respect to the fixed roller.
A driving device for moving the control device.
An automatic sewing device configured to be controlled by a step . 2. A wrapping guide, a sewing machine, and a tension roller mechanism provided on both sides of the continuous cloth are supported by a pair of movable tables movably supported in the width direction of the continuous cloth. 2. The automatic sewing apparatus according to claim 1, further comprising a moving means for moving the continuous fabric in the width direction.