JP3042680B2 - Automatic curtain fold sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention automates the work of setting dough, data input, and holding dough other than the last fold set so that it is suitable for order curtain production. Conventionally, only one machine can be operated by one person. On the other hand, two or three units can be operated by one person at the same time, and even if one unit is held, hook insertion, thread pinching, etc. can be performed during automatic sewing, greatly improving productivity. The present invention relates to an automatic machine for sewing curtain folds.

[0002]

2. Description of the Related Art In recent years, demand for custom-made curtains has been growing. Curtains that sew sewing folds by custom-made sewing are required to have a high quality and luxury. Therefore, the fabric is made thicker than high quality curtains, and the number of ridges in each set of folds is three or two. As well as the number of folds in each fold, the use of fabric is increased. And the height of the plurality of ridges in each set of folds is constant without height irregularities, the shape is parallel to the fabric perpendicular to the fabric without falling or collapsing, and the spacing between each set of folds is constant without irregularity Is required. In particular, the finished dimensions in the width direction are
Strict conditions are required such that the width of the window of the building of the orderer must exactly match the size of the window, and a somewhat longer one is allowed, but a shorter one is not allowed.

FIG. 34 explains the terminology of a curtain. First, as shown in FIG. 34 (a), which is an upper front view in the state of the fabric, the original width refers to the width of the entire curtain fabric in which both ends of the fabric are wound and sewn three times. The left and right widths from the fabric edge to the pleat are referred to. The pleat length is the length of the pleat to be folded, and the hook interval (also called tack interval) is the distance between the pleat and the pleat. Then, as shown in FIG. 34 (b), which is an upper front view after the sewing of the pleats, the finished width is a width obtained by removing the width of both ears from the cloth width of the pleats, and the number of pleats is one sheet. Means the number of folds sewn on the curtain (9 in the example shown). As shown in FIG. 34 (c), which is an end view showing the difference in the number of peaks, there are two or three peaks as the number of peaks, and FIG. 34 (a) is an end view showing the height of the peak. As in d), the height of the mountain is
The length from the top of the pleat to the pleat is referred to, and as shown in FIG. 34 (e) which is an end view showing the depth of the trough, the depth of the trough means the distance from the bottom of the pleat to the pleat. Say the length.

By the way, when forming and supplying the folds in sewing of a curtain, measurement of the interval between the folds performed many times and required dimensions for each set of folds, errors in both dimensions caused by fabric feeding, and errors in the overall finished width are caused by manual work. The present applicant has already proposed a pleat forming / supplying device for the purpose of eliminating irregularities in the dimensions and formation of the pleats and valleys that occur. As described in Japanese Patent Application Laid-Open Nos. H8-38767 and H8-155169, this crease forming / supplying device is a curtain fabric having one end horizontally arranged with a crease assembly interval outward from a sewing portion of a sewing machine. Of the length of the folds and valleys, sandwiching the left and right sides of the fabric from above and below, and horizontally approaching the left and right sides of the sandwiched fabric toward the middle and bending the fabric vertically upward, curving A plurality of ridges and valleys are formed vertically on the folded folds, and the cloth holding the ridges and valleys is put on the cloth, and counterclockwise so that the tops of the ridges are positioned horizontally toward the sewing portion of the sewing machine. The fold is rotated 90 degrees, and the rotated fold is horizontally moved and supplied to the sewing portion of the sewing machine, a part of the cloth is released, and the base of the supplied fold is partially sewn to the ridge and the valley. The sewing machine is sewn by the sewn part, and is configured to be operated sequentially. A.

[0005] By combining such a fold forming and supplying device with a sewing machine such as an electronic bar-tacking sewing machine, the following effects a) and b) can be obtained. a) In forming and supplying folds in sewing of a curtain, measurement of the interval size of each set of folds and measurement of required dimensions for each set of folds and feeding of the fabric, which are performed a number of times, are performed by the input storage of the control device and the output of the output. Since the operation is performed by the operation, no error occurs between the respective dimensions and the finished dimensions, so that the quality of the curtain is improved. b) Since the formation of the folds in the sewing of the curtain is performed by the operation and operation of the input storage of the control device and the output thereof, the dimensional error of the crests and valleys of each fold and the collapse or collapse of the shape do not occur. Quality is improved.

[0006]

However, in the above-described conventional fold forming / supplying apparatus, the work is carried out while holding the dough by hand even after the dough is set in the apparatus. That is, while performing the manual operation of attaching the cloth edge to the guide roller, the fold operation and the insertion operation to the sewing machine are performed following the fold operation of the fold required for the fold, and the fold sewing and the mountain stop sewing (also referred to as two-shape sewing). ) Or after thread cutting after reverse T-shaped sewing, it was necessary to perform the same clamping operation while holding the fabric by hand for the next fold sewing. In addition,
In normal operation and continuous operation, stop at the last fold and enter the remaining dough length (for long and short cases)
I do. During the adjustment operation, the remaining three folds are left to stop, and the remaining length of the dough is manually measured with an electronic measure.
Automatic adjustment with one fold.

Accordingly, an object of the present invention is to provide a curtain fold sewing automatic machine which realizes automation of an operation for holding a cloth other than a cloth set and a final fold set, thereby contributing to a large improvement in productivity. is there. It is another object of the present invention to realize automatic measurement of the remaining length of the dough when performing the automatic adjustment of the remaining folds, and to fully automate the dough holding operation other than the dough setting and the final fold setting.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an invention according to claim 1 is to sequentially hold a sewing machine such as an electronic bar-tacking sewing machine having a sewing needle and a cloth presser from the front end side of a curtain fabric. Front holding means by a clamp member or the like forming a pair before and after folding, folding means by upper and lower folding members for folding the curtain fabric portion held by the front holding means, these front holding means, A fold forming / supplying device having a fold supply unit including a pivoting member and a slide member for rotating the fold folding means integrally and inserting the fold portion of the curtain fabric into the sewing portion of the sewing machine. An automatic sewing machine, wherein the folds formed by the fold formation supply device are pressed by the cloth presser of the sewing machine. It is characterized in configuration, having a tension biasing device biasing the pulling force to the rear side with respect to.

Here, for example, the fold forming and supplying device is assembled on the sewing machine main body side. The front side of the curtain fabric is held by the front holding means of the fold forming / supplying device, and the rear side is set in the tensile force urging device. The formation of the folded portion and the insertion into the sewing portion (between the needle plate and the presser foot) by the folded portion forming / supplying device are sequentially performed according to the number of folded portions. The tension urging device makes the curtain fabric lightly stretched between the curtain fabric and the presser foot of the sewing machine.

As described above, according to the first aspect of the present invention, the sewing machine, the front holding means for sequentially holding the curtain fabric from the front end side, and the fold folding means for folding the held curtain fabric portion. A fold forming / supplying device having fold supply means for rotating these two means integrally and inserting a fold portion of the curtain fabric into a sewing portion of the sewing machine;
Since it is an automatic curtain fold sewing machine equipped with a tension urging device that urges the curtain fabric in a state where the fold portion is pressed by the cloth presser of the sewing machine to the rear side,
The formation of the fold portion and the insertion into the sewing portion of the sewing machine by the fold portion forming / supplying device are sequentially performed in accordance with the number of folds. Becomes lightly stretched between the sewing machine and the presser foot. Therefore, the work of holding the dough other than the dough set and the final fold set can be automated.

Further, the invention according to claim 1 is characterized in that the tension urging device has a tension urging roller which rotates in a direction of urging the rearward side in contact with the curtain fabric. Configuration, also features.

As described above, according to the first aspect of the present invention, the pulling force is applied to the rear side in contact with the curtain fabric.
Tensioning with tensioning rollers rotating in opposite directions
Since it is a device , the curtain fabric can be lightly stretched between the sewing machine and the presser foot by urging the curtain fabric with a tensile force that rotates in contact with the curtain fabric. .

[0013] Moreover, a first aspect of the present invention, the fabric feed direction against the curtain fabric of the tensile force urging the roller
Adjust the angle of contact in a direction that is almost
Also, a configuration provided with a roller angle varying device that can be varied in the front-rear direction .

[0014] Thus, according to the first aspect of the invention, the feed material against the curtain fabric tension urging roller way
Direction that is almost perpendicular to the direction
Is further provided with a roller angle varying device that can be varied in the front-rear direction along the length of the fabric.
When the angle of contact in the direction perpendicular to the cloth is changed obliquely forward along the cloth feeding direction , the cloth ends are aligned with the roller root side when the curtain cloth is supplied to the sewing machine by the fold forming supply device. In addition, the contact angle in a direction substantially perpendicular to the cloth feed direction of the tension urging roller to the curtain cloth
If it is changed obliquely backward along the cloth feeding direction, the cloth ends are aligned with the roller base when the curtain cloth is discharged from the sewing machine.

[0015] According to a second aspect of the invention, a curtain pleat sewing automatic machine according to claim 1, characterized in configuration, having a roller moving device for forward and backward operation of the tensile force urging the roller in the axial direction And

As described above, according to the second aspect of the present invention, the tension urging roller according to the first aspect is a curtain fold sewing automatic machine equipped with a roller moving device that moves forward and backward in the axial direction. If the cloth has moved from the regular cloth end position to the tip side of the pulling force urging roller, for example, the pulling force urging roller is retracted by the roller moving device, and the curtain cloth is detected by the cloth end position confirmation switch. Then, the pulling force urging roller can be moved forward to return to the original position.

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an automatic curtain fold sewing machine according to the present invention will be described below with reference to FIGS.

<First Embodiment> First, FIG. 1 shows a curtain fold sewing automatic machine as a first embodiment of the present invention to which the present invention is applied. FIG. 2 is an enlarged perspective view of the external appearance perspective view, and FIG.
FIG. 4 is a perspective view showing the roller rotating device in the tension urging device enlarged from the rear side, and FIG. 4 is a front view showing the roller angle varying device in the tension urging device enlarged from the rear side. FIG. 5 is an enlarged perspective view of the base portion of the fold forming / supplying device and the tensile force urging device of FIG. 1 from the rear side. FIG. 6 is a perspective view of the support bracket of the roller rotating device of FIG. It is a vertical side view which showed the attachment relationship with respect to a base part. 7 is an external perspective view showing the curtain fold sewing automatic machine of FIG. 1 together with a cloth feeding device. FIG. 8 is a perspective view showing the cloth feeding device portion enlarged from the opposite side.
FIG. 9 is a plan view showing a driving device for the cloth auxiliary feed roller. Further, FIGS. 10 to 18 show a sewing procedure from the front clamp state of the fabric to the last fold according to the embodiment of the present invention.

First, in FIGS. 1 and 7, 1 is a sewing machine, 2 is a fold forming / supplying device, 3 is a dough placing table, 4 is a tensile force urging device, 5 is a cover, 6 is a dough feeding device, and 7 is a dough feeding device. Needle plate, 8 is a cloth presser, 9 is a retaining needle, 11 is an operation panel, 12
Denotes front holding means, 13 denotes fold folding means, 14 denotes fold supply means, 16 and 16 denote front clamp plates, 17 and 17 denote rear clamp plates, 18, 18 and 18 denote lower folding plates, and 19 and 1.
Reference numeral 9 denotes an upper folding plate, reference numeral 21 denotes a pulling force urging roller, reference numeral 22 denotes a cloth pressing roller, reference numeral 23 denotes a positioning flange portion, reference numeral 24 denotes an electronic measure, and reference numeral 96 denotes a sewing needle. That is, the curtain fold sewing automatic machine includes a sewing machine 1, a fold forming supply device 2, a fabric placing table 3, a tensile force urging device 4, and a fabric feeding device 6 as shown in the figure.

As shown in the figure, the sewing machine 1 is installed on a sewing machine table T, and is provided with a needle plate 7 on a bed, an up-and-down movable presser foot 8 disposed above the bed, and a further upper position thereof. And a pair of retaining pins 9 and 9.
A fold forming / supplying device 2 is provided on the other side of the drawing so as to be adjacent to the sewing machine 1 and a cloth placing table 3 is provided on the near side of the drawing. A tension urging device 4 is disposed on the right side of the fold forming / supplying device 2 in the figure, and a cover 5 is provided to cover the rear side of the fold forming / supplying device 2 and the tensile force urging device 4. ing. An operation panel 11 is provided on the cover 5.

The fold forming / supplying device 2 is mounted adjacent to the sewing machine main body of the sewing machine 1, and clamps and holds both sides of a fold required at the front side of a curtain cloth C (see FIG. 10 and thereafter) described later. Folding means 1 for forming desired folds between the front holding means 12 for forming the desired folds of the curtain cloth C held by the front holding means 12.
3 and a fold supply means 14 for inserting the fold formed by the fold folding means 13 into a sewing portion of the sewing machine 1 (between the needle plate 7 and the presser foot 8). The cloth placing table 3 is a small table having substantially the same height as the needle plate 7 and is disposed adjacent to the sewing machine table T.

The front holding means 12 is for holding the front side of the dough. First, a pair of upper and lower front clamp plates 16 for holding the front end of the dough, and a predetermined size of the required length of the fold from the holding portion. And a pair of upper and lower rear clamp plates 17, 17 for holding a portion separated by a distance. These front clamp plates 1
6, 16 and the rear clamp plates 17, 17 hold the dough in a horizontal state. The fold means 13 includes the front holding means 12.
Are located between the front clamp plates 16 and 16 and the rear clamp plates 17 and 17, and three lower folding plates 18, 18 and 18 arranged below and two upper folding plates arranged above. 19, 19 are provided. The lower folding plates 18, 18, 18 and the upper folding plates 19, 19 both move up and down, and are arranged alternately in the front-rear direction.

The three lower folding plates 18, 18, 1
As for 8, one of the central pieces can be moved up and down, and the number of mountains is 2
And the number of peaks increases to three, and the number of peaks can be increased to break three peaks.
19 can also be in a state of being superimposed on each other. The fold supply means 14 includes the front clamp plates 16, 16, the rear clamp plates 17, 17 of the front holding means 12, the driving devices thereof, and the lower folding plates 18, 18, 18 of the fold folding means 13. It comprises a rotatable rotating plate in which the upper folding plates 19, 19 and their driving devices are assembled, a slide member in which this rotating plate is assembled, and a driving device for them.

The tension urging device 4 includes a tension urging roller 2.
1 and a dough pressing roller 22 above it, and a positioning flange 2
3 are provided. An electronic measure 24 is provided on the right side of the tension urging roller 21, and the electronic measure 24 is wound in a case 25 and can be pulled out of the case 25. In addition, the pulling force urging roller 2
On the left side of 1, as shown in FIGS. 2 and 10, a right fabric edge position confirmation switch 26 using a photoelectric sensor is provided. The case 25 of the electronic measure 24 and the right fabric end position confirmation switch 26 are fixed to a connecting bar 47 described later.

As shown in FIG. 3, the tension urging roller 21 is rotatably supported by a roller bracket 27, and a roller driving device 28 is provided on the rear side of the roller bracket 27. The roller driving device 28 includes a motor 29, a powder clutch 31, and two-stage timing belt devices 32 and 33. That is, the timing belt 35 is wound around a pulley (both not shown) provided on the drive shaft of the motor 29 and a pulley 34 provided at one end of the powder clutch 31, and a pulley provided at the other end of the powder clutch 31. (Not shown) and a pulley 36 provided on the shaft of the pulling force urging roller 21, a timing belt 37 is stretched. Here, the powder clutch 31
Is to transmit and cut off the torque at a predetermined torque.

The fabric holding roller 22 is rotatably supported by one end of a roller support arm 39 which is pivotally supported by a roller bracket 27 with a support shaft 38 at an intermediate portion as a fulcrum. Between the other end of the roller support arm 39 and the roller bracket 27, the fabric holding roller 2
An air cylinder unit 41 for moving the roller up and down for raising and lowering the roller 2 is installed.

By the way, the roller bracket 27 is
As shown in FIG. 6, it is attached to the intermediate plate 42 via a forward / backward air cylinder unit 43. This forward / backward air cylinder unit 43
Constitutes a roller moving device that causes the pulling force urging roller 21 and the cloth pressing roller 22 to move forward and backward within a range of, for example, 35 mm. Then, the intermediate plate 42 is supported by a support shaft (bolt) 45 with respect to the base plate 44 of the tensile force urging device 4.
Is pivotally mounted around the fulcrum. As shown in FIG. 5, the base plate 44 is fixed to the base plate 46 of the crease forming / supplying device 2 via a connecting bar 47. That is, as shown in FIG. It is fixed by a shaft (bolt) 45 and a bolt 48. As shown in FIG. 5, the base plate 46 of the fold forming / supplying device 2 is movable along a pair of guide rods 49, 49, and is moved by driving an air cylinder unit (not shown).

As shown in FIG. 4, the intermediate plate 42 is provided with a back pressing roller 5 provided on a base plate 44.
The upper surface of the intermediate plate 42 is pressed by an engaging pin 52 on the upper surface of the intermediate plate 42. A long hole 55 formed in one half of a bell crank 54 whose middle corner is pivotally supported on a support shaft 53 on the base plate 46 is engaged with the engagement pin 52. This bell crank 5
An air cylinder unit 56 installed on the base plate 46 is connected to the other half of the fourth unit 4. By driving the air cylinder unit 56, the base plate 4
On 6, the intermediate plate 42 is configured to rotate around a support shaft 45 as a fulcrum. That is, the pulling force urging roller 21 and the cloth pressing roller 22 provided on the roller bracket 27 mounted on the intermediate plate 42 via the forward / backward air cylinder unit 43 are indicated by arrows F and R in FIG. Thus, the angle is variable in the front-rear direction. Thus, the variable roller angle device 57 is configured.

Further, as shown in FIG. 7, a dough feeding device 6 is provided above the dough placing table 3. As shown in FIG. 8, the cloth feeding guide device 6 includes a pair of roller support arms 62, 62 provided on a post 61 erected on a sewing machine table T by a rotary air cylinder unit 63 so as to be vertically swingable. I have. As shown in FIG. 9, a roller shaft 65 having a pair of cloth feed rollers 64, 64 at both ends is rotatably supported at the distal ends of the pair of roller support arms 62, 62. A motor 66 is attached to one of the roller support arms 62, and a timing belt device 67 as a power transmission device is provided from an output shaft of the motor 66 to the roller shaft 65.

Next, the operation and operation of the automatic curtain fold sewing machine having the above configuration will be described in order. The operation is performed under the control of a control device such as a microcomputer (not shown). First, input setting of necessary data is performed in the setting unit of the liquid crystal display unit of the operation panel 11 by the power switch 0N. That is, data necessary for the fold sewing of the order curtain, such as the original width, the finished width, the number of folds, the number of ridges, the width of the ears, and the sewing pattern, is input. Next, the curtain fabric is set. That is, as shown in FIG. 10, the front end portion of the curtain cloth C is held by the front clamp plate 16, the curtain cloth C is placed on the tensioning roller 21, and the cloth pressing roller 22 is placed thereon. . Here, before setting, the dough pressing roller 22
Is held in a standby state in which it has moved above the tension urging roller 21. The clamping operation by the front clamp plate 16 is performed by depressing a foot pedal (not shown).

The setting for such a clamp is carried out by an operator holding the fabric by hand, and the pulling force is applied so that the right fabric end position confirmation switch 26 detects the right fabric end by its photoelectric sensor function. The right end of the fabric is brought into contact with the positioning flange 23 along the roller 21. When setting the curtain cloth C as described above, the rear clamp plate 1
The cloth is passed between 7, 17 respectively. In addition, the operator places the front side portion of the curtain fabric C on the fabric placing table 3. Thereafter, by depressing the foot pedal again, the curtain material C is clamped by the rear clamp plate 17 and the roller support arm 39 is rotated by the driving of the roller vertical moving air cylinder unit 41 to rotate the fabric pressing roller 22. Is lowered, and the cloth pressing roller 22 presses the curtain cloth C on the tension urging roller 21.

When the front portion of the curtain fabric C is clamped in this manner, the motor 29 of the pulling force urging device 4 is driven by detecting the right end of the fabric by the right fabric end position confirmation switch 26. The rotation by the driving of the motor 29
The power is transmitted to the tension urging roller 21 via the timing belt device 32, the powder clutch 31, and the timing belt device 33, and the tension urging roller 21 is driven to rotate clockwise in FIGS. As a result, the curtain cloth C is divided into the front clamp plate 16 and the rear clamp plate 1.
7 and a state of being stretched horizontally between the tension urging roller 21 and the cloth pressing roller 22. Subsequently, the roller support arm 62 is lowered by driving the rotary air cylinder unit 63, and the curtain cloth C on the cloth placing table 3 is moved.
The cloth feed rollers 64, 64 are placed on the sheet. The fabric feed rollers 64, 64 are always mounted on the curtain fabric C thereafter, but are not yet driven to rotate by the motor 66.

It should be noted that, by the above-described necessary data input setting, various automatic alignments such as a hook interval, a required length of a fold, a peak height, and a switching of the number of peaks between two or three are performed. . That is, the hook interval between the presser foot 8 of the sewing machine and the front clamp plate 16 is determined, the length of one tack between the front clamp plate 16 and the rear clamp plate 17 is determined, and the lower folding plates 18 and 1 are determined.
Determination of the amount of rise for obtaining the height of the folds 8 and 18, and the lower folding plates 18, 18, 18 and the upper folding plates 19, 1
Automatic setting such as determination of the number of sheets of No. 9 is performed.

When the start switch is turned on, a fold folding command is issued. The folding is performed by lowering the lower folding plates 18, 18, 18 from below with respect to the cloth (curtain cloth C) and lowering the upper folding plates 19, 19 from above. At this time, the front clamp plate 16 moves backward, and the rear clamp plate 17 moves forward and moves synchronously. That is, in the case of three peaks, as shown in FIG. 11 (a), three lower folding plates 18, 18, 1
8 rises while two upper folding plates 1
9, 19 are lowered, and three creases are formed. In the case of two ridges, as shown in FIG. 11 (b), one central piece descends from below and the two lower folding plates 18, 18 on both sides rise with respect to the cloth. , From the top, two sheets are superimposed to form an apparent upper sheet 19
(19) is lowered, and two folds are formed. After the predetermined crease folding is performed, the cloth is inserted into the sewing machine 1.

That is, as shown in FIG. 12, the rotary plate of the fold supply unit 14 is turned 90 degrees toward the sewing machine 1 and the slide member of the fold supply unit 14 is rotated as shown in FIG. Side, and the folds of the fabric formed as described above are inserted into the sewing portion of the sewing machine 1 (between the needle plate 7 and the presser foot 8). At this time, the motor 66 of the cloth feeding device 6 is driven, that is, the timing belt device 6 is driven.
7, and the fabric feed rollers 64, 64
, Is driven to rotate clockwise. This allows
The curtain cloth C is sent on the cloth placing table 3 toward the sewing machine 1, and the feed of the curtain cloth C by such cloth feed rollers 64, 64 is performed intermittently by the length of the folds and the length of the hook interval. It is done on a regular basis.

Next, as shown in FIG. 13, before the sewing machine 1 fixes the fabric folds on the needle plate 7 by the cloth presser 8, the retaining needles 9 and 9 are penetrated into the fabric folds. When the retaining needles 9, 9 penetrate into the fabric folds, the lower folding plates 18, 18, 18 and the upper folding plate 1
Since the open grooves shown in the figures are formed in the cloth holders 9, 19 and the cloth foot 8, the retaining needles 9, 9,
Penetration is performed without hindrance. Thereafter, as shown in FIG. 14, the lower folding plates 18, 18, 18 and the upper folding plate 1
The dissociation operations 9 and 19 and the operation of extracting from the dough are performed. Then, the fabric folds on the needle plate 7 are fixed by the cloth presser 8 by the sewing machine 1, and the retaining needles 9, 9 are lifted up from the fabric folds and removed. Then, the disengagement operation of the front clamp plate 16 and the rear clamp plate 17 and the removal operation from the cloth are performed.

In the above description, the tension urging roller 21 is
As described above, the rotation state (the rotation direction is shown in FIGS. 1 and 2).
Therefore, the fabric cloth C on the tension-force urging roller 21 is given a tensile force from the sewing machine 1 toward the front side. However, since the powder clutch 31 is interposed in the power transmission path from the motor 29 to the tension urging roller 21, while rotating the tension urging roller 21, an appropriate tensile force is applied to the curtain cloth C. When the resistance from the curtain cloth C exceeds a predetermined torque, the powder clutch 31 becomes idle and absorbs the torque. As is well known, the powder clutch 31 can adjust the torque value at the boundary between transmission and cutoff of the rotational force by variably controlling the voltage or the current.

By the way, the selection of the sewing pattern depends on the original width,
It is automatically calculated by inputting the finishing width, the number of folds, the number of ridges, the width of ears, and the like, and the resulting numerical values, namely, the hook interval, the required tack length, and the height of the folds are determined. The height of the crest is formed by the amount of rise of the lower folding plates 18, 18, and 18, and a clog stitch pattern most suitable for the height of the crease is automatically selected. Each sewing pattern is input before sewing, and the depth of a valley is also input by default.

Next, fold sewing will be described. This fold sewing method is performed by the sewing needle 96 of the sewing machine 1. As shown in FIG. 16, the cloth is sewn in the vertical direction along the required length of the fold of the cloth C to form the fold stitch portion 71. I do. Subsequently, two-shape sewing or reverse T-shaped sewing is performed. That is, the method of two-letter sewing is performed by the sewing needle 96 of the sewing machine 1.
16 is performed following the fold sewing portion 71 shown in FIG.
As shown in (a), a fold portion of the cloth is sewn in parallel with the fold stitch portion 71 to form a two-shaped stitch portion 72. Also, the reverse T-shaped sewing is performed following the fold sewing section 71 by the sewing needle 96 of the sewing machine 1, and FIG.
As shown in the figure, a fold portion of the cloth is sewn at right angles to the fold stitch portion 71 to form an inverted T-shaped stitch portion 73. After such sewing, thread trimming is performed by the automatic thread trimming device of the sewing machine 1, and the work clamp 8 returns to the work clamp origin.

In the meantime, the curtain cloth C is lightly stretched horizontally between the sewing machine 1 fixing the cloth folds on the needle plate 7 by the cloth presser 8 and the tension force urging roller 21 and the cloth press roller 22. ing. Next, it is determined whether or not the operation is the adjustment operation. In the case of Yes, since the computer of the machine knows the number of remaining sewing folds,
When the number is other than three, the above-described sequential operation is automatically repeated, and the pleat sewing is repeated. As shown in FIG. 15, the fold forming / supplying device 2 returns to the initial state for the second and subsequent folds of the fold, and the fabric folds on the needle plate 7 by the sewing machine 1 are removed. The front clamp plate 16 and the rear clamp plate 17 remain fixed by the pressure foot 8.
Is performed. This results in the hook spacing,
Accurate dimensions are always obtained between the presser foot 8 of the sewing machine 1 and the front clamp plate 16. Further, similarly to the above, the cloth feed by the cloth feed rollers 64, 64 is performed each time.

When it is determined that there are three remaining folds, the finishing width is adjusted. That is, the order curtain is
It is necessary to finish the finishing width accurately. For this purpose, before the last three tacks, as shown in FIG. 19, the operator pulls out the electronic measure 24 and measures the remaining cloth width. Then, the computer calculates again from the measured remaining fabric width, and the finishing width is adjusted by automatically positioning each device without changing the hook interval and the ear width. For example, if there is no deviation in the remaining dough, the length of one tack (the distance between the front clamp plate 16 and the rear clamp plate 17) does not change (the position does not change), and the height of the folds is the same as the conventional height. become. Further, in many cases, the fabric is stretched or shrunk during sewing or the actual size is deviated when measured and input manually. In the final three-tack adjustment at this time, the length of one tack changes due to automatic calculation and automatic positioning, and a slight change occurs in the height of the fold. For example, when the number of folds is 9, the height of the folds is slightly different between the folds up to 6 and the last 3 folds.
Since the error is dispersed to 18 sides of the double, only an error that is hardly found is generated.

After the finishing width adjustment is performed, the process returns again to repeat the fold sewing. When it is determined that the operation is not the adjustment operation (No) (continuous operation mode or the like), it is determined whether or not it is the last fold. If it is not the last fold, the process returns to perform an additional fold sewing automatic process. When it is determined that the fold is the last fold, the cloth is not clamped by the front clamp plates 16, 16 and the rear clamp plates 17, 17, and the cloth presser 8 stops in a lowered state.

Then, only for the last fold, the operator holds the dough rear end and holds the front clamp plates 16 and 16 and the rear clamp plate 1.
After passing the cloth between 7 and 17, the upper end of the cloth is pushed into the cloth guide on the back side (right side toward the sewing machine), and the front clamp plates 16 and 16 are closed by the foot switch. Further, the fabric terminal is aligned with the rear end of the rear clamp plate 17, and the rear clamp plates 17, 17 are clamped by the foot switch 0N. The rear end of the rear clamp plate 17 is adjusted to the rear end when the ear width is 30 mm. When the ear width is 25 mm, the position is 5 mm inside (in front of) the rear clamp plate 17 (half of the rear clamp plate 17 in FIG. 18). Up to the top of the section). Also, if the difference comes out without the dough end just coming to the above position,
In order to match the required length of the fold (the dimension between the front clamp plate 16 and the rear clamp plate 17), if the error is input as a plus or minus numerical value, automatic control is performed again, and the fabric end is moved to the rear end of the rear clamp plate 17. Will match. Then, the foot switch is turned on and the cloth is clamped by the rear clamp plate 17. Then, following the fold folding, the insertion of the cloth into the sewing machine, the selection of the sewing pattern, the fold sewing, the zipper sewing, and the thread trimming, the presser foot 8 of the sewing machine 1 is raised to 1
The sewing of one curtain is completed.

The details of the movement of the curtain fabric C during a series of curtain sewing operations will be described below. When the curtain fabric C is set on the fold forming / supplying device 2 by clamping it on the front clamp plate 16 and the rear clamp plate 17, the fabric behind the rear clamp plate 17 moves in the following order. (1) The front clamp plate 16 and the rear clamp plate 17 at the time of fold folding by the lower folding plate 18 and the upper folding plate 19
Are close to each other, the curtain fabric C moves forward, and the curtain fabric C is pulled rearward by the rotation of the pulling force urging roller 21 that comes into contact with the rear. (2) After folding the folds, when the rotating plate of the fold supply unit 14 rotates 90 degrees in place, the clamp plates 16 and 17 and the folding plates 18 and 19 depend on the required size of the folds and the hook interval.
May collide with the sewing machine 1, so that the fold forming / supplying device 2 itself temporarily retreats. Therefore, the curtain cloth C once retreats, and the rear part thereof is temporarily loosened, but is pulled rearward by the rotation of the tension urging roller 21.

(3) After the fold forming / supplying device 2 has retreated,
The pivot plate of the fold supply unit 14 rotates, and the clamp plate 1 is rotated.
When the folding plates 6 and 17 and the folding plates 18 and 19 rotate by 90 degrees, the curtain fabric C advances and is pulled backward by the rotation of the tension urging roller 21. (4) After the 90-degree rotation, when the clamp plates 16 and 17 and the folding plates 18 and 19 advance toward the sewing machine 1, the curtain fabric C advances and is pulled rearward by the rotation of the tension urging roller 21. (5) When the sewing machine 1 moves forward from the work clamp origin to the sewing origin by the amount of the empty feed while the cloth presser 8
Is pulled forward by the rotation of the tension urging roller 21.

(6) At the time of fold sewing, the curtain cloth C is swung right and left. (7) At the time of arresting by two-shape stitching or reverse T-shape stitching, the cloth presser 8 retreats and the curtain fabric C also retreats, but is pulled rearward by the rotation of the tension urging roller 21. (8) Return to the presser foot origin by the sewing machine idle feed, and curtain fabric C
Also recedes, and is pulled rearward by the rotation of the tension urging roller 21.

As described above, by using the curtain fold sewing automatic machine of the embodiment, the operation of holding the fabric other than the fabric setting and the final fold setting can be automated, so that the productivity can be greatly improved. Can be achieved. Specifically, since the tension force urging device 4 for urging the curtain fabric C in a state where the fold portion is pressed by the cloth presser 8 of the sewing machine 1 to the rear side is provided, the fold portion forming supply is performed. Forming a folded part by machine 2 and sewing machine 1
Are sequentially inserted according to the number of folds, and the sewn portion of the sewing machine 1 at the fold portion (between the needle plate 7 and the work clamp 8).
In the inserted state, the curtain cloth C is lightly stretched between the cloth presser 8 of the sewing machine 1 by the tension force urging device 4.

That is, in the embodiment, the curtain cloth C
The tension force urging roller 21 urges the curtain fabric C with the tension force to the rear side because the tension force urging roller 21 rotates in the direction of urging the tension force to the rear side by contacting the curtain cloth C. Thus, the curtain cloth C can be lightly stretched between the cloth presser 8 of the sewing machine 1. This allows
Except for the cloth setting and the final fold setting, the operation of holding the curtain cloth C can be automated. In addition, since the powder clutch 31 is provided on the power transmission path from the motor 29 to the tension urging roller 21, the tension urging roller 2
When the resistance from the curtain fabric C side exceeds a predetermined torque while applying an appropriate tensile force to the curtain fabric C by the rotation of 1, the powder clutch 31 becomes idle and can absorb the torque. Therefore, the tension urging roller 21 can allow the curtain fabric C to advance toward the sewing machine 1 while applying an appropriate tensile force to the curtain fabric C, and can perform the pleat sewing smoothly.

Since a roller angle varying device 57 is provided for changing the contact angle of the tension applying roller 21 with respect to the curtain fabric C in the front-rear direction, the roller angle varying device 57 applies a tensile force to the curtain fabric C. By changing the contact angle of the roller 21 back and forth as necessary, the fabric end of the curtain fabric C on the tensioning urging roller 21 can be aligned with the roller base. That is, the intermediate plate 42 is rotated about the support shaft 45 on the base plate 44 by the driving of the air cylinder unit 56, and the intermediate plate 42 is attached to the roller bracket 27 attached via the forward / backward air cylinder unit 43 on the intermediate plate 42. The curtain cloth C on the tensile force urging roller 21 is changed by changing the angle of the provided tensile force urging roller 21 and the cloth holding roller 22 in the front-rear direction as indicated by arrows F and R in FIG. The fabric ends are brought closer to the positioning flange portion 23 at the base of the roller and aligned.

Specifically, the curtain cloth C to the sewing machine 1
Is supplied to the sewing machine 1 by the fold forming / supplying device 2 by changing the contact angle of the pulling force urging roller 21 to the curtain fabric C diagonally forward (in the direction of arrow F in FIG. 2). At this time, the fabric edge is aligned with the positioning flange portion 23 at the base of the roller. Further, when the curtain cloth C after sewing is discharged from the sewing machine 1, the contact angle of the tensile force urging roller 21 with respect to the curtain cloth C is changed obliquely rearward (in the direction indicated by the arrow R in FIG. 2) so that the curtain cloth C is stitched. At the time of discharging from the fabric 1, the fabric end is aligned with the positioning flange portion 23 side.

Further, since a roller moving device (forward / backward air cylinder unit) 43 for moving the tension urging roller 21 forward and backward in the axial direction thereof is provided, the curtain cloth C is moved from the regular cloth end position to the tension urging roller. 21 can be dealt with. That is, when the curtain cloth C has moved to the tip end side of the tension urging roller 21, the tension urging roller 21 is moved backward by the roller moving device (forward / backward air cylinder unit) 43, and the curtain cloth is moved. C is sensed by the right fabric end position confirmation switch 26 by the photoelectric sensor, and at the same time, the fabric pressing roller 22 is raised, and then the pulling force urging roller 21 is advanced to return to the original position.

More specifically, when the curtain fabric C has moved from the regular fabric edge position detected by the right fabric edge position confirmation switch 26 by the photoelectric sensor to the tip side of the pulling force applying roller 21 for some reason. (For example, 10 mm
The roller bracket 27 is moved backward with respect to the intermediate plate 42 by driving the forward / backward air cylinder unit 43. Then, the tension urging roller 21 provided on the roller bracket 27 retreats and moves the curtain fabric C to the position of the right fabric end position confirmation switch 26 by the photoelectric sensor. When the right fabric edge position confirmation switch 26 by the photoelectric sensor detects the fabric edge, the rear clamp plates 17, 17 are closed and folding is started. Then, by moving the pulling force urging roller 21 forward and returning it to its original position,
It can return to normal folding and sewing.

Since the curtain cloth C is placed on the cloth placing table 3 and the curtain cloth C is sent to the sewing machine side, the cloth can be fed in synchronization with the folding and sewing operation. That is, as described above, the slide member of the fold supply means 14 is moved to the
When the fold portion is inserted into the sewing portion of the sewing machine 1 (between the needle plate 7 and the cloth presser 8), the cloth feed rollers 64, 64 are driven to rotate by the motor 66 via the timing belt device 67, The curtain fabric C on the fabric placing table 3 is fed toward the sewing machine 1 by the length of the above-mentioned folds and the length of the hook interval. Therefore, when feeding the curtain cloth C fold portion to the sewing machine 1, it is possible to perform a smooth fold and sewing operation by avoiding that the heavy curtain cloth C hangs down on the front side and hinders sewing. it can.

<Second Embodiment> FIG. 20 shows an automatic curtain fold sewing machine according to a second embodiment of the present invention. FIG. 21 is an enlarged perspective view showing the tensile force urging device and the dough remaining length automatic measuring device.
FIG. 2 is a perspective view showing a configuration of an automatic measuring device for remaining cloth length with a remaining cloth alignment plate removed. FIGS. 23 and 24 are enlarged views of the upper and lower portions of the automatic remaining cloth length measuring device of FIG. FIG. 25 is an external perspective view showing the curtain fold sewing machine shown in FIG. 20 together with a cloth feeding device, and FIG. 26 is a cloth remaining length of the remaining three folds measured by the cloth remaining length automatic measuring device. It is the perspective view which showed automatic measurement of the height. FIGS. 27 to 32 show the control from the start to the end by the curtain fold sewing automatic machine according to the second embodiment.

In FIGS. 20 to 25, the first
1 is a sewing machine, 2 is a fold forming / supplying device, 3 is a dough placing table, 4 is a tensile force urging device, 5 is a cover, 6 is a dough feeding device, 7 is a needle plate, 8 Is a cloth presser, 9 is a retaining pin, 11 is an operation panel, 12 is a front holding means, 13
Is fold folding means, 14 is fold supply means, 16 and 16 are front clamp plates, 17 and 17 are rear clamp plates, 18 and 1
8 and 18 are lower folding plates, 19 and 19 are upper folding plates,
21 is a tension urging roller, 22 is a fabric holding roller, 23
Is a positioning flange, 27 is a roller bracket, 39
Is a roller support arm, 44 is a base plate, 61 is a post, 62 is a roller support arm, 63 is a rotary air cylinder unit, 64 is a cloth feed roller, 66 is a motor, and 80 is a new automatic measurement of the remaining cloth length. The device, 81 is a case, 82 is a remaining cloth alignment plate, 83 is a long hole, 84 is a motor, 85 is a toothed pulley, 86 is a rotary encoder, 87 is a toothed pulley, 88 is a timing belt, 89 is a sensor bracket, 90 is a scanning device,
91 is an optical sensor, 92 and 93 are proximity switches (limit switches), and 96 is a sewing needle.

That is, in the second embodiment, similarly to the first embodiment, a tensile force urging device 4 is provided, and as shown in FIG. 80. Dough Remaining Length Automatic Measuring Device 80
Is housed in a relatively thin and elongated box-shaped case 81. The case 81 is fixed to the above-described connecting bar 47 below the tension urging device 4 (the tension urging roller 21 and the fabric pressing roller 22) and is in an inclined state having a slight angle from the vertical state. The remaining fabric aligning plate 82 is attached to the inclined open surface. A slit-shaped long hole 83 that is long in the up-down direction is formed in the center portion in the width direction of the remaining cloth alignment plate 82.

Inside the case 81, a motor 84
Is fixed, and this motor 84 is
, And a rotary encoder 86 is fixed at a lower portion.
Is provided with a toothed pulley 87. The timing belt 8 is attached to the toothed pulley 85 of the upper motor 84 and the toothed pulley 87 of the lower rotary encoder 86.
8, and a sensor bracket 89 is fixed to the timing belt 88. From the above,
A scanning device 90 is configured, that is, a light emitting / receiving optical sensor 91 is attached to a sensor bracket 89, and the optical sensor 91 is vertically moved along a long hole 83 of the remaining cloth aligning plate 82. A scanning device 90 that drives to scan is configured.

Proximity switches 92 and 93 serving as limit switches are mounted above and below the inside of the case 81. The ends of the sensor bracket 89 enter the upper and lower proximity switches 92 and 93, respectively. , The driving of the motor 84 is stopped. As shown in FIG. 26, the cloth remaining length automatic measuring device 80 is for automatically measuring the cloth remaining length up to the remaining three folds. Specifically, the sensor bracket 89 moves downward from above through the timing belt 88 by driving of the motor 84 of the scanning device 90, that is, the optical sensor 91 moves along the long hole 83 of the remaining fabric aligning plate 82. By scanning from the upper side to the lower side, the terminal of the curtain fabric C is detected by the light emission / reception of the optical sensor 91. When the terminal of the curtain cloth C is detected by the optical sensor 91 in this manner,
A signal of the movement amount of the optical sensor 91 is output from the rotary encoder 86 to the control device. Then, in the control device, the presser foot 8 of the sewing machine 1
Is added to the distance memorized in advance to the upper proximity switch 92 via the upper proximity switch 92, and the cloth remaining length is obtained.

The control from the start to the end by the curtain fold sewing automatic machine according to the second embodiment will be described with reference to the flowcharts of FIGS. 27 to 32.
First, as shown in FIG. 27, immediately after the start, first, in step S1, the front clamp plates 16, 16 on the far side are closed to hold the front end of the curtain cloth C, and then in step S1,
In step S2, the closing clamp plates 17 and 17 are closed to hold the curtain cloth C, and then in step S3, the cloth feeding rollers 64 and
64 (see FIG. 10). Thereafter, the processes from step S4 to step S9 are performed simultaneously in parallel.

In step S4, the front and rear clamp plates 1
6 and 17 move to the center (see FIG. 11). Step S
At 5, the clamp stopper (not shown) is turned ON. In step S6, the trumpet base, that is,
The base provided with the lower folding plates 18, 18, 18 is moved upward. In step S7, the retracting cylinder, that is, the air cylinder unit 56 of the roller angle varying device 57 is turned ON. In step S8, the pulling force urging roller 21 is angle-changed so that the tip thereof faces left (see the direction of arrow F in FIG. 2). In step S9, the upper folding plates 19, 19 are moved down (see FIG. 11).

The steps S3 to S9 are as described above.
After the parallel processing up to step S10, the motor 29 of the pulling force urging roller 21 is turned on in step S10, and the powder clutch 31 is turned on in step S11.
In a succeeding step S12, the cloth pressing roller 22 is moved down on the curtain cloth C on the tension urging roller 21 (FIG. 1).
0). Then, in the next step S13, the rotary plate of the fold supply unit 14 is rotated 90 degrees toward the sewing machine 1 by a rotary cylinder (not shown) (see FIG. 12). 66 to O
N operations are performed. The ON operation of the motor 66 is based on
This is performed for the time calculated from the hook interval.

Subsequently, as shown in FIG.
At 15, a wrapper, ie, lower folding plates 18, 18, 18
And a closing operation of stacking the upper folding plates 19, 19 is performed.
In a succeeding step S16, the powder clutch 31 is turned off.
After the operation, in the following step S17, the slide member of the fold supply unit 14 is inserted into the sewing portion of the sewing machine 1 at the back by the front and rear cylinders (not shown) (see FIG. 13). Then, in the next step S18, when the retaining needle 9 descends and penetrates the fabric fold on the needle plate 7, the following step S1 is performed.
At 9, the upper folding plates 19, 19 perform a standby operation to the back side through the extraction and disengagement operations from the fabric folds, and at the subsequent step S20, the lower folding plates 18, 18, 18 move backward to the near side, and at step S21. The upper folding plates 19 and 1
9 moves backward from the back side to the right. Then, step S2
At 2, the clamp stopper is turned off. At the next step S23, the cloth presser 8 moves down on the cloth fold on the needle plate 7, and then at the next step S24, the retaining needle 9 moves up.

Subsequently, as shown in FIG.
25 and step S26, the front clamp plate 1 on the back side
In addition to the dissociation operation of the clamp plates 6 and 16, the disengagement operation of the clamp plates 17 and 17 is performed. Then, the next step S2
After setting the sewing data in step 7, the following step S2
In step 8, after searching for the required-size motor, the subsequent step S29
Then, the front and rear clamp plates 16 and 17 retreat to the right, and in the following step S30, the rotating plate of the fold supply unit 14 returns to the rotation origin. Then, in step S31, the powder clutch 31 is turned on, and then in step S32,
Sewing by sewing machine 1 starts.

Subsequently, step S33 and step S33 are executed.
34 are performed simultaneously in parallel, that is, step S
At 33, the retracting cylinder is turned off to return the fold forming / supplying device 2 to the origin. Further, step S
At 34, the pulling force urging roller 21 is operated to change its angle so that its tip is directed rightward (see the direction of arrow R in FIG. 2).
Following the parallel processing of steps S33 and S34, in step S35, the clamp stopper is
In step S36, the slide member of the fold supply unit 14 is moved forward by the front and rear cylinders to return to the origin. Then, in the next step S37, it is determined whether or not the fold is three peaks.
8, the lower folding plates 18, 18, 18 and the upper folding plates 19, 19 are all dissociated, and then the next step S3
9, if it is not three mountains but two mountains, the process directly proceeds to step S39, and the front and rear clamp plates 16,
17 moves forward to the left.

Subsequently, as shown in FIG.
At step 40, the front and rear clamp plates 16, 17 are moved outward from the center, and at step S41, the upper folding plates 19, 1 are moved.
9 to the left, and in the following step S42,
Perform sewing machine completion check. Then, step S4
3, the right cloth edge position confirmation switch 26 by the photoelectric sensor
It is determined whether or not the fabric positioning is OK based on the presence / absence of the fabric sensing. If OK, the process proceeds directly to step S48 in the flow of FIG. 31. If NG, the process proceeds to step S44. In this step S44, the operation of the roller advance / retreat air cylinder unit 43 causes the pulling force urging roller 2 to move.
1 is moved backward. The amount of retreat of the pulling force applying roller 21 is, for example, 3 cm, and the time required for the operation is, for example, 3 seconds.

Then, in the next step S45, the retracting operation time of the tension urging roller 21 is a predetermined time (for example, 3
Second) has elapsed, and if it has not elapsed, the process returns to step S43. If it has elapsed, in step S46, the cloth pressing roller 22 is opened upward from the tension urging roller 21. Then, in the next step S47,
The operation of the roller advance / retreat air cylinder unit 43 causes the tension urging roller 21 to move forward. afterwards,
The curtain cloth is placed on the tension urging roller 21 by manual operation, and the process returns to the step S43 again.

Also, as shown in FIG. 31, step S4
At 8, it is determined whether or not there are three remaining tacks. If it is not the remaining three tacks, the process proceeds to step S49 of the flow in FIG. 32. If it is the remaining three tacks, the process proceeds to step S51.
In step S49 of FIG. 32, it is determined whether or not there is one remaining tack. If not, the process proceeds to step S50. If it is one remaining tack, the process proceeds to step S60.

Then, in step S48 of FIG. 31, if there are three remaining tacks, in step S51, the measuring motor, that is, the motor 84 of the automatic remaining cloth length measuring device 80 is used.
Starts scanning the optical sensor 91 downward. In a succeeding step S52, the lower limit, that is, OFF / 0N of the lower proximity switch 93 is determined. If it is OFF, it is determined in a step S53 whether or not the cloth edge is detected. In step S54, the motor 84 is stopped, and in step S55, the motor 84 is again driven to rotate in the reverse direction to return the optical sensor 91 upward. The origin return of the optical sensor 91 is performed as shown in FIGS.
This is the 0N position of the upper proximity switch 92, which is the upper limit.

If the fabric edge is not detected in step S53, the process returns to step S52. However, if the fabric edge is detected, in the next step S56, the measurement data, that is, the optical The moving distance data of the sensor 91 is taken into the control device. Then, in the next step S57, the motor 84 is turned off. In the following step S58, the position calculation and movement of the required length of the fold, the hook interval, and the height of the fold are performed. In the next step S59, the motor 84 is again driven to rotate in the reverse direction. After returning the optical sensor 91 to the upper origin position, the process returns to the step S1 in the flow of FIG.

Here, the automatic measurement of the remaining fabric length is performed as follows.
Actually, the processing is finished in just over one second (1.24 seconds in the embodiment). On the other hand, the manual measuring in the first embodiment described above required 5 seconds. In the case of the manual ruler according to the first embodiment described above, the processing from step S51 to step S59 in the flow of FIG. 31 is of course not performed.

In step S49 of FIG.
In the case of a tack, in step S60, the cloth feed roller 64 is raised, and in step S61, the cloth pressing roller 22 is opened upward from the tension urging roller 21, and then, in the next step S62, the pulling is performed. The motor 29 of the force urging roller 21 is turned off. Then, in the next step 63, the start switch is turned on by depressing the foot pedal once, and in the following step S64, the front clamp plates 16, 1 are turned on.
6 is closed and the curtain cloth C is held. continue,
In step S65, a length is input, and the subsequent step 66
Then, depress the foot pedal once more to turn on the start switch, and in a succeeding step S67, the front rear clamp plate 1
After closing the curtain cloth C by operating the closing operation of the curtain cloths 7 and 17, the flow returns to the parallel processing of the step S4 to the step S9 in the flow of FIG.

Further, in step S50 of FIG. 32, it is determined whether or not there is remaining 0 tack. If not, the process returns to step S1 in the flow of FIG. 27. If so, the process proceeds to step S68.
In step S68, the presser foot 8 of the sewing machine 1 is raised, and in step S69, the folding device, that is, the fold forming / supplying device 2 is returned to the origin, and the process is terminated.

<Modification> FIG. 33 is a view similar to FIG.
It is the perspective view which showed the modification which provided the cloth steadying member 95 with the structure of FIG. In this modified example, in the configuration of the second embodiment, as shown in the drawing, a cloth steadying member 95 is provided integrally with a sensor bracket 89.
In this way, by providing the cloth steadying member 95 integrally with the sensor bracket 89 that moves in the vertical direction by the scanning device 90 of the optical sensor 91, as shown in FIG. In the automatic measurement of the remaining fabric length up to the remaining three folds, the curtain fabric C can be stabilized on the terminal side where the curtain fabric C hangs.

In each of the above embodiments, a roller rotation type is used as the pulling force urging device 4. However, the present invention is not limited to this, and it is possible to apply an appropriate pulling force to the cloth. If so, a device using a clamp mechanism or another structure may be used. Further, a bar code may be input for each input item (the original width, the finished width, the number of folds, the number of crests, the ear width, etc.). By inputting a bar code in this manner, the bar code is accurate, correct, and efficient. In this case, in the normal setting, the bar width can be input with the original width.

In the second embodiment, the optical sensor 91 of the automatic remaining cloth length measuring device 80 is connected to the case 81.
However, the optical sensor 91 may be provided not on the case 81 but on the side of the cloth steadying member 95 of the modified example. Further, in the second embodiment, the rotary encoder 86 is provided and used for the calculation of the remaining fabric length. However, without providing the rotary encoder 86, a servo motor or a stepping motor is used, and the control signal thereof is used. It is also possible to calculate the remaining fabric length. As means for detecting the terminal of the cloth, an optical sensor 9 is used.
The switch is not limited to one, and may be a contact switch. Further, it goes without saying that other specific detailed structures and the like can be appropriately changed.

[0088]

As described above, according to the curtain fold sewing automatic machine according to the first aspect of the present invention, the formation of the fold portion and the insertion into the sewing portion of the sewing machine according to the number of folds are performed by the fold forming and supplying device. When the folded part is inserted into the sewing part of the sewing machine, the curtain fabric can be lightly stretched between the sewing machine and the fabric presser by the tensile force urging device. The operation of holding the dough can be automated. Therefore, it becomes particularly suitable for order curtain production, and a large improvement in productivity can be achieved.

Further, according to the curtain fold sewing automatic machine according to the first aspect of the present invention, the curtain cloth is urged by the tension urging roller which rotates in contact with the curtain cloth to pull the curtain cloth backward. Thus, the curtain fabric can be lightly stretched between the sewing machine and the presser foot.

In addition, according to the automatic curtain fold sewing machine according to the first aspect of the present invention, the cloth feeding of the tension urging roller to the curtain cloth is performed by the roller angle varying device.
The angle of contact in a direction that is almost perpendicular to the direction
When the curtain fabric is supplied to the sewing machine by the crease forming / supplying device, the fabric edge can be aligned with the roller base side, and the fabric feed of the tension urging roller to the curtain fabric can be performed. Almost perpendicular to the direction
By changing the contact angle obliquely rearward along the cloth feeding direction in the direction in which the cloth is fed, there is obtained an advantage that when the curtain cloth is discharged from the sewing machine, the cloth ends can be aligned with the roller base side.

According to the automatic curtain fold sewing machine according to the second aspect of the present invention, in addition to the effect obtained by the first aspect of the present invention, in addition to the effect obtained by the first aspect of the present invention, the curtain cloth is moved from the regular cloth end position to the tip side of the tension urging roller. If it has been moved to, by a roller moving device, for example, the tension force urging roller is retracted, the curtain fabric is detected by the fabric edge position confirmation switch, and then the tension force urging roller is advanced. The advantage is that it can be undone.

[0092]

[0093]

[0094]

[0095]

[0096]

[0097]

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a curtain fold sewing automatic machine as a first embodiment to which the present invention is applied, omitting a cloth feeding device.

FIG. 2 is an enlarged perspective view of a pulling force urging device and a right fabric edge position confirmation switch of FIG. 1;

FIG. 3 is an enlarged perspective view of a roller rotating device in the pulling force urging device of FIG. 1 from a rear side.

FIG. 4 is an enlarged front view of a roller angle varying device in the tensile force urging device of FIG. 1 from the rear side.

FIG. 5 is a perspective view showing a base portion of the crease forming / supplying device and the tensile force urging device of FIG. 1 in an enlarged manner from the rear side.

FIG. 6 shows the support bracket of the roller rotation device of FIG. 3;
FIG. 4 is a vertical sectional side view showing a mounting relationship with respect to a base portion.

FIG. 7 is an external perspective view showing the automatic curtain fold sewing machine of FIG. 1 together with a cloth feeding device.

FIG. 8 is a perspective view showing the cloth feeding device portion of FIG. 7 enlarged from the opposite side.

FIG. 9 is a plan view showing a driving device of the cloth auxiliary feed roller of FIG. 8;

FIG. 10 is a perspective view showing a cloth front clamping state according to the embodiment of the present invention.

FIG. 11 shows folds of the fabric following FIG. 10;
(A) is a perspective view showing the case of three peaks, and (b) is a perspective view showing the case of two peaks.

FIG. 12 is a perspective view showing a rotating operation of a folded part of the fabric following FIG. 11;

FIG. 13 is a perspective view showing a state where the folded portion of the fabric is inserted into the sewing machine, following FIG. 12;

FIG. 14 is a perspective view showing the retraction of the fold folding device from the fold portion of the fabric following FIG. 13;

FIG. 15 is a perspective view showing the raising of the presser retaining needle from the fold portion of the fabric following FIG. 14;

16A and 16B show fold sewing following FIG. 15;
Is a plan view showing the case of fold stitching and mountain stitching, (b)
FIG. 4 is a plan view showing the case of fold stitching and reverse T-shaped stitching.

FIG. 17 is a perspective view showing a clamped state of a next fold following the thread trimming after the sewing of FIG. 16;

FIG. 18 is a perspective view showing a clamped state of a last fold.

FIG. 19 is a perspective view showing the measurement of the remaining fabric length up to the remaining three folds during the adjustment operation.

FIG. 20 is an external perspective view showing a curtain fold sewing automatic machine as a second embodiment to which the present invention is applied, omitting a fabric feeding device.

FIG. 21 is an enlarged perspective view of the tensile force urging device and the automatic remaining cloth length measuring device of FIG. 20;

22 is a perspective view showing the configuration of the automatic measuring device for remaining length of fabric shown in FIG. 21 with the remaining fabric alignment plate removed.

FIG. 23 is an enlarged view of an upper portion of the automatic remaining cloth length measuring device of FIG. 22.

24 is an enlarged view of the lower part of the automatic remaining cloth length measuring device of FIG. 22.

FIG. 25 is an external perspective view showing the curtain fold sewing automatic machine of FIG. 20 together with a cloth feeding device.

FIG. 26 is a perspective view showing automatic measurement of the remaining cloth length up to the remaining three folds by the cloth remaining length automatic measuring device in the second embodiment.

FIG. 27 is a flowchart showing control from the start to the feed roller motor ON by the automatic curtain fold sewing machine according to the second embodiment.

FIG. 28 is a flowchart showing control up to the needle raising following FIG. 27;

FIG. 29 is a flowchart showing control up to the folding left following FIG. 28;

FIG. 30 is a flowchart showing control according to cloth positioning OK or NG following FIG. 29;

FIG. 31 is a flowchart showing control up to the measuring motor following FIG. 30;

FIG. 32 is a flowchart showing control up to the end following FIG. 31;

FIG. 33 is a perspective view showing a modification of the automatic dough length measuring device with the remaining dough alignment plate removed as in FIG. 22 and a dough steadying member provided.

34 (a) is an upper front view in a fabric state, (b) is an upper front view after sewing folds, (c) is an end view showing a difference in the number of peaks, (D) is an end view showing the height of the peak, and (e) is an end view showing the depth of the valley.

[Explanation of symbols]

C Curtain cloth T Sewing machine table 1 Sewing machine 2 Crease forming and supplying device 3 Cloth placing table 4 Pulling force urging device 5 Cover 6 Fabric feeder 7 Needle plate 8 Cloth press 9 Closing needle 11 Operation panel 12 Front holding means 13 Fold folding means 14 Folding part supply means 16, 17 Clamp plate 18, 19 Folding plate 21 Pulling force urging roller 22 Fabric holding roller 23 Positioning flange 24 Electronic measure 26 Right fabric end position confirmation switch 27 Roller bracket 28 Roller driving device 29 Motor 31 Powder Clutches 32, 33 Timing belt device 39 Roller support arm 41 Air cylinder unit for roller up / down movement 42 Intermediate plate 43 Air cylinder unit for roller forward / backward movement (roller moving device) 44 Base plate for tension urging device 45 Support shaft 46 Plunger type Feeder base plate 47 Connecting bar 49 Guide rod 57 Roller angle variable device 61 Post 62 Roller support arm 64 Fabric feed roller 66 Motor 67 Power transmission device 71 Pleated sewing part 72 Double stitching part 73 Reverse T-shaped sewing part 80 Fabric remaining Automatic length measuring device 81 Case 82 Remaining cloth alignment plate 83 Elongated hole 84 Motor 85 Toothed pulley 86 Rotary encoder 87 Toothed pulley 88 Timing belt 89 Sensor bracket 90 Scanning device 91 Optical sensor 92, 93 Limit switch 95 Dough stopper Member 96 sewing needle

Continuation of the front page (56) References JP-A-8-155169 (JP, A) JP-A-4-146253 (JP, A) JP-A-10-43454 (JP, A) JP-A-7-39665 (JP, A) , A) JP-A-3-26290 (JP, A) JP-A-60-50963 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05B 1/00-97/12 D06J 1/02 A47H 13/14

Claims (2)

(57) [Claims] A sewing machine having a sewing needle and a cloth presser; front holding means for sequentially holding the curtain cloth from the front end side; fold folding means for folding the curtain cloth portion held by the front holding means; A fold forming / supplying device having a fold supply unit for rotating the front holding unit and the fold folding unit integrally to insert the fold portion of the curtain fabric into the sewing portion of the sewing machine. A tension force urging device for urging the curtain fabric in a state where the fold portion formed by the fold formation supply device is pressed by the cloth presser of the sewing machine in a rearward direction. The tension-applying device includes a tension-applying roller that rotates in a direction to contact the curtain fabric and apply a tensile force to the rear side. To, the angle of contact in a direction substantially orthogonal to the cloth feeding direction with respect to the curtain fabric of the tensile force urging the roller,
An automatic curtain fold sewing machine, comprising: a roller angle variable device that can be varied in the front-rear direction along the cloth feeding direction. 2. A curtain fold sewing machine according to claim 1, further comprising a roller moving device for moving the tension urging roller forward and backward in the axial direction thereof.