JPS6243711B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a sewing device for circular fabric, in which a continuous length of tape-shaped fabric is sent to a sewing table of a sewing machine, cut into a predetermined length, and the fabric is sewn into a circular shape. It provides a new and improved mechanical means for automatically performing the sequence of overlapping and sewing the ends of the pieces together.

(Prior art) Various tape-shaped fabrics, such as narrow elastic tape fabrics containing stretchable elastic threads, or narrow tape fabrics made of general knitted fabrics or woven fabrics, are cut to a fixed size and then made into circular tape bodies. It is well known that such circular tape bodies are sewn and attached to the cuffs, hem openings, or waist areas of various clothing for tightening or shaping purposes.
All sewing is done by hand and requires a great deal of time and effort.

Therefore, as an annular fabric sewing device for fully automating these operations, a device described in Japanese Patent Publication No. 56-50998 has been provided.

(Problems to be Solved by the Invention) However, this conventional device uses a reversing arm, a clamping member, a bending member, and a superimposing member to overlap both ends of a cut piece of fabric on a sewing table. Therefore, the operation of the entire device becomes complicated and large, and the cost becomes high.

(Means for Solving the Problems) The present invention is intended to solve these conventional problems, and as a specific means for that purpose, it is possible to feed a continuous length of tape-like fabric to the sewing table of a sewing machine. A sewing device for circular fabric that overlaps and sews both ends of a piece of fabric cut to a predetermined length by a machine, which can be opened and closed to sandwich the piece of fabric, and so that both ends of the piece of fabric are overlapped. A pair of rotatable clip members are arranged on both sides of the sewing table of the sewing machine, and a drawer member is provided between the pair of clip members that can be raised and lowered and that pulls out the tape-like fabric by a predetermined length when lowered. It is equipped with a cutter that cuts the tape-shaped fabric at predetermined length positions.

(Example) The present invention will be described in detail below with reference to the embodiments shown in the drawings. Fig. 1 shows important parts of a clip member for feeding a continuous length of tape-shaped fabric and holding the fabric in an embodiment of the apparatus of the present invention, and Fig. 2 shows the overall arrangement of the relevant parts and the sewing machine. First, the required structure of the sewing machine will be explained. As shown in Fig. 2, the sewing machine head 1 is equipped with a sewing machine needle 7 and a sewing machine presser foot 6, and a sliding plate 8 that is movable in vertical and horizontal directions is provided on the sewing surface of the sewing table 1a on which the throat plate 1b is installed. The sewing machine presser foot 6 presses and supports the placed workpiece, and the sewing machine needle 7 performs the required sewing.These are the same as those in conventional sewing machines, but the purpose of the present invention is to In order to sew the tape-shaped fabric in a circular shape, the sewing machine presser foot 6 is shaped like a rectangular frame, as shown in FIG. 2 and partially shown in FIGS. The presser foot 6 is designed to stably and reliably press the overlapped ends 51a and 51b of the tape-shaped fabric 51 that has been cut to a certain size, so that the required sewing can be carried out smoothly. Furthermore, as shown in FIG. 9, the sliding plate 8 has a square window hole 8a for inserting a sewing machine needle, and an operating rod 8b.
It can be slid vertically and horizontally as shown by the arrows. Using one side of this plate 8, as shown in FIG. 2 and FIG.
Positioning guide 5 regulating one side of the width direction of b
is installed in the form of a wall, and this guide 5
A positioning correction guide 1 for aligning the other sides of both ends 51a and 51b in the width direction in correspondence with
0 is arranged so that it can be vertically raised and lowered as well as horizontally moved.
The guide 10 is connected to the sewing machine head 1 as shown in the second diagram.
A bracket 9 is provided which can be raised and lowered by a lifting cylinder 9a using a cylinder 9a, and is supported by the bracket 9 so as to be horizontally movable via a moving cylinder 9b.
This positioning correction guide 10 is used to correctly position both ends 51a and 51b of the tape-shaped fabric 51 carried onto the sewing table 1a and align them to the optimum sewing position, as will be described later. Further, as shown in FIGS. 2 and 6, on one side of the sewing table 1a, there is a tape body extrusion member 4 for ejecting the annular tape body after the required sewing is completed, to the outside of the machine, an extrusion cylinder 2, An extrusion lever 3 that can be moved forward and backward by the cylinder 2 is provided so that it can be pushed forward and backward toward one side of the tape-like fabric 51.

On one side of the sewing table 1a of the sewing machine as described above, in the positional relationship shown in FIGS. 1 and 2,
The continuous long tape-shaped fabric according to the present invention is cut to a fixed size, and the fabric is formed into a ring shape to form the sewing table 1a.
A series of devices are provided for feeding the fabric for side wrapping, cutting to length and forming rings. That is, in both figures, 50 indicates a continuous tape-like fabric,
In the present invention, such a tape-like material 50 is first cut into a tape-like material 51 having a predetermined length as shown in FIG. 10A, and then, as shown in FIG. and the end portion 51b which is the rear end of the delivery are overlapped to form an annular shape, and both end portions 51
a, 51b can be a direct sewn part 52a as shown in B of the same figure, or a rectangular sewn part 5 as shown in C of the same figure.
The annular tape body 53 is obtained by integrating the sewing machine frame 40 with a required sewing structure such as 2b. A pair of clip members 2 for holding the tape-like fabric 50 therebetween.
7 and 29 are arranged in parallel and can be opened and closed, respectively, and rotated around the axis, and both members 27 and 29 are synchronously connected to the sewing table 1.
They are arranged side by side so that they can move forward and backward toward a. That is, the clip members 27 and 29 have the same structure, and each has a fixed finger 27.
Opening/closing finger 2 that can be opened and closed freely for a and 29a
7b, 29b, and as illustrated in FIG. 12, the fixed fingers 27a, 29a are fixed to the respective opening/closing cylinders 41, 41; Each piston rod 41a, 41
The piston rod 41a is engaged and connected to the piston rod 41a through the elongated hole 42 pin 43, and the fingers 27b and 29b are both pivotally supported on the cylinders 41 and 41 side through the pivot shaft 44.
is opened and closed relative to the fixed fingers 27a, 29a by advancing and retreating, thereby holding the tape-like fabric 50 between the fingers 27a, 27b, 29.
It can be held and released between a and 29b. The cylinders 41 and 41 of both clip members 27 and 29 have joints 57 and 5, respectively.
Clip shafts 45, 45 are connected via the
The shafts are mounted in parallel between the bearing brackets 46, 46 provided on the zero side, respectively, so that they can rotate and freely move forward and backward in the axial direction, and can hold both clip shafts 45, 45 in common and move together in the axial direction. A slide bracket 47 that rotatably supports the shafts 45, 45 is slidably mounted on the guide shaft 48 and is connected to a cylinder 49 for advancing and retracting, so that both clip members 27, 29 can be attached to the sewing table. gears 55, 55 of rotary drive members 54, 54, such as high rotors, which are movable synchronously toward the slide bracket 47; In the present invention, the clip members 27, 29 can be rotated by 180 degrees by applying rotation about the clip shafts 45, 45 by engaging the clip members 56, respectively.

In order to feed out the continuous long tape-like fabric 50 toward both the clip members 27 and 29, in the present invention, as shown in FIG.
On the outside of the fingers 27a, 27b at 7,
A drive roller 23 for sending out the tape-shaped dough 50, and a driven roller 1 supported swingably by a spring 19.
8, furthermore, a delivery guide 14, a guide roller 15,
17. A fabric delivery mechanism such as a feeding defect detection member (phototube or other) 16 is provided, and the tape-shaped fabric 50 is shaped and held in a straight line below the delivery member formed by the driving roller 23 and the driven roller 18. A ruler guide 13 is provided on both clip members 27 and 29 so as to be able to move forward and backward for stable and accurate feeding. As shown in FIG. 11, the standard guide 13 is a plate body with a generally gutter-shaped cross section that supports and guides the tape-like material 50 in a horizontal position. The fingers 2 of both clip members 27, 29 are slidably engaged and connected to the slider 13a with the composite cylinders 11, 12.
It is possible to freely advance and retreat orthogonally between 7a, 27b, 29a, and 29b. Furthermore, this ruler guide 13
and the aforementioned delivery drive roller 23 driven roller 1
8 and the clip member 27, a tape-shaped fabric guide plate 20 is interposed between the tape-shaped fabric 5 and the clip member 27.
Both a movable cutter 24 and a fixed cutter 25 are provided for cutting the zero, and the movable cutter 24 can be raised and lowered toward the fixed cutter 25 by a lifting cylinder 37, and both cutters 24, 25 to cut the fabric 50, and between the fingers 27a, 27b, 29a, 29b of both clip members 27, 29, there is a pull-out member 26 for pulling out the tape-shaped fabric 50 over a fixed length. However, tension block 2
Together with 6a, it is provided on the positioning shaft 28 so as to be vertically movable up and down. That is, the drawer member 26 has a tape-like fabric 5 extending between both clip members 27 and 29.
The positioning shaft 28 is engaged with the tension block 26a of the member 26 and pulled out downward by its own weight, and both ends of the positioning shaft 28 are fixed as shown in FIGS. 5A and 5B. The block 26a is slidably and loosely fitted onto the shaft 28, and a support plate 38 held by a lifting cylinder 39 is fitted onto the same shaft 28 so as to be able to rise and fall as a member that supports and raises the block 26a. It can be freely engaged and detached from the block 26a. Also block 2
A sensing member 58 is attached to a part of the block 6a, and in order to respond to the sensing member 58 and stop the block 26a, and thus the pull-out member 26, at a desired position, a plurality of proximity switches 59 are suitably operated according to the length and width. Intermediate proximity switches 60 are fixedly arranged in a row at corresponding positions, and intermediate proximity switches 60 for raising and stopping the lowered drawer member 26 to an intermediate position are disposed as shown in the fifth figure. Further, on the outside of each of the fingers 27a, 27b, 29a, 29b in both clip members 27, 29, as shown in FIGS.
Positioning correction guides 35 and 30 for the tape-like fabric 50 inserted between 9a and 29b are provided, respectively. Both of these guides 35 and 30 are for correctly aligning the clamping position of the fabric 50 within the fingers, and both guides 35 and 30 are approximately L-shaped, and a part of the middle portion thereof is swung by a pivot 61. It is movably supported, one end of the upper part is connected to operating members 36, 33 such as an air cylinder, an indicator, etc., and the rotation angle is regulated by a regulating stopper 62, so that the position of the fabric 50 can be corrected. In addition, as shown in Figure 1,
On the outside of one clip member 29, a sensing member 31 such as a phototube or the like is installed via a mounting base 32 for sensing the front end of the tape-like material 50. It shows an air injection nozzle placed on the moving path of the tape-shaped fabric 50 to assist in smoothly feeding the fabric. This is because when the tape-shaped fabric 50 is fed out, for example, a tape fabric containing elastic threads, the fabric 50 may become wavy and stagnate in the ruler guide 13 due to wavy irregularities during movement. In such a case, these nozzles 2
Pressurized air is injected from 1 and 34 to assist the smooth delivery movement, and the injection is controlled in synchronization with the stoppage of the drive roller 23 for sending out the dough. In the nozzle 34 adjacent to the clip member 29,
It is used as necessary so that the spraying stops when the clamping of the fabric is started, and it is not necessary to use it for the tape-shaped fabric 50 that is not likely to become clogged or stagnate. In addition, what is indicated by 63 in FIG. 2 is the drive roller 23 for feeding the dough.
Although a driving motor is shown, it is of course possible to use another motor for rotationally driving the roller 23. In addition, in FIGS. 7 and 8, 6
4 indicates that when the annular tape body 53, which is a completed product that has been sewn as required on the sewing table 1a, is pushed out of the sewing table 1a by the extrusion member 4, the same tape body 5
A receiving and transferring rod 64 is shown for receiving and moving the sewing table 3 to the target position, and the rod 64 is rotatably supported by a rotating member such as a rotary cylinder at 65, so that the rod 64 is pushed out from the end of the sewing table 1a. Part 4
As shown in the figure, the annular tape body 53 pushed out by the annular tape body 53 is received and moved to a target position by rotation of the rod 64, but this receiving means can of course be freely designed other than the illustrated example.

The sewing of the circular fabric according to the present invention, that is, the cutting of a continuous length of tape-like fabric to a fixed size, the forming of the cut fabric piece into a circular shape, and the sewing are carried out fully automatically as follows based on the illustrated embodiment of the apparatus. It will be.

That is, as is clear from the explanatory diagram of the arrangement relationship of the main components of the device shown in FIG. 3 and the explanatory diagram of the operating state shown in FIGS. In the figure, the ruler guide 13 is in a position in front of the cutting cutters 24, 25, the movable cutter 24 is in the raised position via the cylinder 37, and the pair of clip members 27,
At 29, with respect to the fixed fingers 27a, 29a, the opening/closing fingers 27b, 29b are in the open position by the respective opening/closing cylinders 41, 41, as illustrated in FIG. Positioning correction guides 35, 30 located on the outside are also supported by actuating members 36, 33 at the positions indicated by solid lines in FIG. From this neutral position, the ruler guide 13 moves forward from the X position in Figure A to the Y position in Figure B through the operation of the compound cylinders 11 and 12, as shown in Figure 4 A and B. The front end side passes between the fingers 27a and 27b of the clip member 27, and is attached to the clip member 29.
It stops at a position close to both fingers 29a and 29b. Next, by rotating the drive roller 23 for feeding the dough, the roller 23 is driven by the driven roller 1.
By feeding out the continuous long tape-like fabric 20 through the tape 8, the fabric 50 moves straight inside the ruler guide 13, and as shown in FIG. advances across the fingers 29a and 29b of the clip member 29,
When the end portion 51a is detected by the sensing member 31, the rotation of the drive roller 23 is stopped and the tape-like fabric 5
This causes the transmission of 0 to be stopped. Next, the opening/closing finger 29b in the open state of the clip member 29 is inserted into the piston rod 41 of the cylinder 41.
By retracting the finger 29b, the finger 29b swings about its pivot 44 as a fulcrum, as shown in FIG. In this case, the 13th
As illustrated in the figure, the clip member 29
The positioning correction guide 30 provided on the outside of the
By swinging the actuating member 33 about the pivot 61, the guide 30 moves from the solid line position to the dotted line position in the figure, thereby causing the end portion held between the fingers 29a and 29b to move. The free end of 51a is connected to fingers 29a, 29
The alignment is corrected so that it is held in a correct orthogonal position with b. After completing the modification of the end portion 51a in this way, as shown in FIG.
As previously explained in FIG. 2, the clip member 29 that holds
Gears 55, 56 are driven by a rotational drive member 54 provided in
By rotating the clip shaft 45 through 180 degrees, the clip member 29 is rotated, and the upper finger 29a becomes the lower finger, and the lower finger 29
The clamped end portion 51a is reversed toward the other clip member 27 as shown in the figure, with the end portion 51a facing upward, and at the same time, the rotation of the fabric delivery drive roller 23, which had been stopped, is restarted to release the tape-shaped fabric 50.
At the same time, the ruler guide 13 is retracted from the Y position shown in FIG. 4C to the Z position shown in FIG.
Furthermore, in synchronization with the feeding of the tape-shaped fabric 50, the pull-out member 26 is vertically lowered. To lower the pull-out member 26, as previously explained in FIGS. By lowering the support plate 38 supported in the raised position by lowering the piston rod of the lifting cylinder 39, the block 26a and the drawer member 26, which are no longer supported by the support plate 38, are lowered by their own weight. The tape-like fabric 50 extending between both clip members 27 and 29 is engaged from above, and the finger 27 between the clip members 27
Through opening of a and 27b, the fabric 50 is pulled out downward as shown in FIG. When the switch 59 and the sensing member 58 correspond to each other, the rotation of the drive roller 23 for feeding out the fabric is stopped, and the feeding of the tape-shaped fabric is stopped. 26 is also stopped at this position, and thus a fixed length of tape-like material 50 is obtained.
By using this, it is also possible to freely change and adjust the delivery length of the fabric 50. In this way, when the fixed length feeding of the tape-like material 50 is completed as shown in FIG. By doing so (this closing operation is the same as in the case of the clip member 29), the tape-like fabric is also held by this clip member 27. After the tape-like fabric 50 is also clamped on the clip member 27 side in this way, the ruler guide 13, which had retreated to the Z position in FIG. 4D, is further moved back to the Z position in FIG. Retract the same guide 1 to the original X position shown.
3 is retracted from the positions of the cutting cutters 24 and 25, the positioning guide 35 provided on the outside of the clip member 27 is moved to the positioning guide 30 on the clip member 39 as illustrated in FIG.
The tape-shaped fabric 50 extending from the clip member 27 onto the ruler guide 13 is properly aligned, and the movable cutter 24 is lowered by the operation of its lifting cylinder 37, thereby removing the fabric 50. The rear end of the feeder is cut off. As a result, the tape-shaped fabric 50 of fixed size is held between the clip members 27 and 29 at the front end 51a and the rear end 51b cut by the cutters 24 and 25. will be obtained. After this tape-like fabric 50 is cut to a specified size, the above-mentioned pull-out member 26 is moved from its lowest position to the intermediate position shown in FIG. It is raised to the position of the proximity switch 60 and temporarily stopped at this position. Next, as shown in FIG. 4E to FIG.
As previously explained with respect to the clip member 29, the member 27 holding the The lower finger 27b is turned upward, the upper finger 27a is turned downward, and the end portion 51a is reversed toward the clip member 29, thereby reversing the end portion that was previously reversed by the clip member 29. This end 51a on 51a
The clip members 2 are folded over each other, and the end portions 51a and 51b are overlapped, and both clip members 2
A cut annular tape fabric piece 51 of fixed size and approximately annularly shaped and gripped by 7 and 29 is obtained.

Next, as shown in FIG. It will be carried upwards. That is, as previously explained in FIG. 2, by moving the slide bracket 47 straight along the guide shaft 48 by operating the advancing/retracting cylinder 49, both clip members 27, 29 move their clip shafts 45, 45 forward in synchronization. , move straight to the sewing table 1a of the sewing machine while holding the annular tape fabric piece 51, and move from the S position to the T position as shown in the figure.
By moving to the position, the annular tape fabric piece 51 is attached to both clip members 2 as shown in FIG.
Both ends 51a, 51 sandwiched by 7, 29
The overlapping part b is located on the sewing surface, and the free annular part extending between the clip members 27 and 29 is carried in so that it is stretched over the lower part of the sewing table 1.
At this time, the sewing machine presser foot 6 is of course in the raised open position, and one side in the width direction of the overlapping ends 51a and 51b between the clip members 27 and 29 is on the sewing table 1.
The annular tape fabric piece 51 is held by both clip members 27 and 29 within the limits of being blocked by the fixed positioning guide 5 erected on the plate 8 on top a.
The passing of the thread to the sewing table 1a side is completed. Next, the movable positioning correction guide 10 provided on the sewing table 1a side is first lowered onto the sewing surface by the lifting cylinder 9a, and then at the overlapping ends 51a and 51b carried in by the moving cylinder 9b. By pushing the other side in the width direction, both of the overlapping ends 51a and 51b are aligned and positioned with the fixed positioning guide 5 in a straight line without any variation, and then the sewing machine Lower the presser foot 6 to remove this aligned overlapped end 5.
1a and 51b on the sewing surface (on the throat plate 1b and the square window hole 8a of the plate 8) as previously shown in FIG.
, and then both clip members 27, 29.
The upper opening/closing fingers 27b, 29b are opened upward by the 180-degree reversal rotation, and both clip members 27, 29 are released from the fabric piece 51, moving from the T position in Fig. 4 to the S position. By retracting both clip members 27, 29
is returned to its original position, and by turning both clip members 27, 29 180 degrees again in the return position, the clip members 27, 29 are prepared for the next round forming of the tape dough, and the intermediate proximity switch is The pull-out member 26, which had been raised to the position 60, is also raised further and returned to its previous position in preparation for the next fixed length delivery of the tape-shaped fabric 50. Incidentally, FIG. 4 H shows the above-mentioned state in which the circular tape fabric piece 51 is placed over the sewing machine table 1a, and FIG.
51b shows the alignment operation state by the positioning correction guide 10.

FIG. 6 shows the overlapping ends 51a and 51b of the annular tape fabric piece 51, which has been positioned on the sewing machine sewing table 1a as described above and is supported in the correct sewing position by the sewing machine presser foot 6. And as previously explained with reference to FIG.
This is carried out in the usual manner by the sewing operation, and as a result, an annular tape body 53 as shown in FIG. 10B is obtained. Discharging the annular tape body 53 obtained in this way from the sewing machine side is optional, but for example, according to the discharging means shown as an example in FIGS. 7 and 8, the annular tape body 53 can be discharged after sewing is completed. , raise the sewing machine presser foot 6,
Extrusion member 4 shown in FIG. 6 provided on sewing table 1a
, one side of the annular tape body 53 is pushed outward from one end in the longitudinal direction of the sewing table 1a, and the extruded annular tape body 53 is placed on the illustrated receiving/transfer rod 64 using its annular shape. The annular tape body 53 as a completed product can be discharged to the outside of the sewing machine. Free and arbitrary design is possible.

Needless to say, during the final sewing operation of the annular tape body 53 on the sewing machine side, the fabric feeding drive roller 23, the ruler guide 13, and the pair of clip members 27, 2
9. Cutters 24, 25 and drawer member 26
The operations of forming a circular tape fabric piece 51 by feeding a continuous length of tape-like fabric to a fixed length, cutting it, and pinching both ends before and after the feeding process are automatically repeated.

(Effects of the Invention) According to the present invention, an annular fabric sewing device that feeds a continuous length of tape-shaped fabric to a sewing table of a sewing machine, cuts the fabric piece to a predetermined length, overlaps both ends of the fabric piece, and sews the fabric piece together. A pair of clip members which can be opened and closed to hold a piece of fabric and are rotatable so that both ends of the piece of fabric overlap are arranged on both sides of the sewing table of the sewing machine. A pull-out member that can be raised and lowered freely and pulls out a predetermined length of the tape-like fabric when lowered is provided between the members, and a cutter is provided that cuts the pulled-out tape-like fabric at a predetermined length position, so that continuous long tape can be cut. A series of sewing operations in which a circular tape body is obtained by cutting a shaped fabric one after another into fabric pieces of a certain length, overlapping the cut ends of the fabric pieces, and sewing them together. ,
Due to its relatively simple operation and mechanism, it can be automated accurately and efficiently, thus offering significant advantages over traditional manual methods as well as traditional mechanical means. It is something you have. especially,
A pair of clip members placed on both sides of the sewing table of the sewing machine hold a piece of fabric cut to a predetermined length, and by rotating the clip members, both ends of the piece of fabric are overlapped.
This method has the advantage that the operation of overlapping the pieces of fabric is extremely simple compared to the conventional method, and that the overlapping can be performed reliably.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of the annular forming mechanism for tape-shaped fabric according to the present invention, Fig. 2 is a front view of an embodiment of the entire device including the sewing machine, and Fig. 3 is an arrangement of each member as an embodiment of the method. 4 is an explanatory diagram of each operation sequence of the method embodiment, FIG. 5 is an explanatory diagram of the operation of the drawer member, FIG. 6 is a perspective view of the main part of the sewing table of the sewing machine, and FIGS. 7 and 8 is an explanatory diagram of the operation of the main discharge part of the product,
FIG. 9 is a perspective view of a part of the sewing table, FIG. 10 is a perspective view of an example of the annular fabric according to the present invention, FIG. 11 is a side sectional view of the main part of the sewing bar, and FIG. FIG. 13 is a side view of the main parts, and FIG. 13 is a side view of one example of the same positioning correction guide. 50... Tape-shaped fabric, 51... Circular tape fabric piece, 51a, 51b... Tape end, 52a,
52b... Sewing portion, 53... Annular tape body, 13
... Ruler guide, 23 ... Drive roller for delivery, 2
4, 25... Cutting cutter, 27, 29... Clip member, 27a, 27b, 29a, 29b...
...Finger, 26...Drawer member, 1...Sewing machine head, 1a...Sewing table.

Claims (1)

[Claims] 1 An annular fabric sewing device that feeds a continuous length of tape-shaped fabric to the sewing table side of a sewing machine, cuts the fabric piece to a predetermined length, overlaps both ends of the fabric piece, and sews the fabric pieces together. A pair of clip members that can be opened and closed and can be rotated so that both ends of the fabric piece overlap are arranged on both sides of the sewing table of the sewing machine. 1. A sewing device for annular fabric, characterized in that a pull-out member is provided for pulling out a tape-shaped fabric by a predetermined length, and a cutter is provided for cutting the drawn-out tape-shaped fabric at a predetermined length position.