JPH0142714B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for sewing circular fabric, in which a continuous length of tape-shaped fabric is fed to a sewing table of a sewing machine, cut into a predetermined length, and the fabric is sewn into a circular shape. A series of operations for overlapping and sewing both ends of the pieces are automatically performed.

(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 proposed.

(Problems to be Solved by the Invention) However, this conventional device uses a holding clip member, a reversing plate, a holding member, and a presser member to overlap both ends of a cut piece of fabric on a sewing table. This method requires members that operate in different ways, making the operation of the entire device complicated and large-sized, as well as increasing the cost.

(Means for Solving the Problems) The present invention is intended to solve these conventional problems, and as a specific means therefor, a pair of clip members 27 arranged horizontally apart from each other by a predetermined distance are provided. , 29, grip a long tape-like fabric 50 of a predetermined length, leaving a predetermined length at both ends 51a, 51b, and rotate the pair of clip members 27, 29 in opposite directions to remove the fabric. By polymerizing both ends 51a and 51b of 50,
The long tape-like fabric 50 is formed into a circular tape fabric piece 5.
1, and then the overlapping portions of the fabric pieces 51 are sewn.

(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 into a circular shape, the sewing machine presser foot 6 is made into a rectangular frame shape as shown in FIG. 2 and a part of it is shown in FIGS. Stably and reliably supports the overlapped ends 51a and 51b of the tape-shaped fabric 51 cut to a fixed size so that the required sewing can be smoothly performed.
Of course, this presser foot 6 can be raised and lowered freely, and as shown in FIG. It can be slid in any direction. Using one side of this plate 8, as shown in FIGS. 2 and 6, one side of the width direction of both ends 51a and 51b of the tape-shaped fabric 51 is restricted. A positioning guide 5 is erected in the shape of a wall, and corresponding to this guide 5, a positioning correction guide 10 for aligning the other sides of both ends 51a and 51b in the width direction is vertically raised and lowered and horizontally moved. possible. As shown in the second figure, the guide 10 is provided with a bracket 9 that can be raised and lowered by a lifting cylinder 9a using the sewing machine head 1, and is supported by the bracket 9 so as to be horizontally movable via a moving cylinder 9b. By using the above-mentioned fixed positioning guide 5 and this positioning correction guide 10, both ends 51a and 51b of the tape-shaped fabric 51 carried onto the sewing table 1a are correctly positioned and optimized, as will be described later. This is to align the sewing position. 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 as to be able to push the tape-like fabric 51 forward and backward toward one side.

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,
A series of devices for cutting the continuous tape-shaped fabric into a fixed size according to the present invention, forming the same into a ring shape, and passing the same onto the sewing table 1a, for feeding the fabric, cutting it to a fixed length, and forming it into an annular shape. will be placed. In both of the drawings, reference numeral 50 indicates a continuous tape-like fabric, and in the present invention, such a tape-shaped fabric 50 is first cut into a tape-shaped fabric 51 having a predetermined length, as shown in FIG. 10A. Then, as shown in FIG.
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 each member can be freely opened and closed, and can also rotate about its axis, and both members 27 and 29 can move forward and backward toward the sewing table 1a in synchronization. They are arranged side by side. That is, the clip members 27 and 29 are both of the same structure, and each has a fixed finger 2.
7a, 29a are provided with opening/closing fingers 27b, 29b which can be freely opened and closed, and as illustrated in FIG. The fingers 27a, 29b are connected to the respective piston rods 41a, 4 of the cylinders 41, 41.
1a through elongated holes 42 and pins 43, and by pivotally supporting the fingers 27b and 29b to the cylinders 41 and 41 sides via pivots 44, the piston rod 41
By opening and closing the fixed fingers 27a, 29a by advancing and retracting the tape-like fabric 50, 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 shafts are mounted parallel to each other between bearing brackets 46, 46 provided on the 0 side so that they are rotatable and freely move forward and backward in the axial direction, and both clip shafts 45, 45 can be held in common and moved 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 the advancing/retracting cylinder 48, so that both the 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 is movable up and down toward the fixed cutter 25 by an elevating cylinder 37. 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 50 extending between both clip members 27 and 29.
and engages with the tension block 2 of the member 26.
6a, the fabric 50 is pulled out downward by its own weight, and the positioning shaft 28 is the fifth
As shown in Figures A and B, both ends are fixed, and the block 26a is slidably and loosely fitted onto the shaft 28.
A support plate 38 held by a lifting cylinder 39 serves as a member to support and raise this.
is fitted onto the coaxial shaft 28 so as to be movable up and down, and can be freely engaged with and disengaged from the block 26a. Also block 26a
A sensing member 58 is attached to a part of the block, and in order to respond to this sensing member 58 and stop the block 26a, and therefore the pull-out member 26, at a desired position, a plurality of proximity switches 59 are provided as appropriate depending on the long and short dimensions. The drawer members 26 are fixedly arranged in corresponding positions and lowered.
An intermediate proximity switch 60 for raising the switch to an intermediate position and stopping the switch is disposed as shown in the fifth figure. Further, on the outside of each of the fingers 27a, 27b, 29a, 29b of both clip members 27, 29, as shown in FIGS. 1, 2 and 13,
respective fingers 27a, 27b and 29
Positioning correction guides 35 and 30 for the tape-like fabric 50 inserted between a and 29b are provided, respectively.
These guides 35 and 30 are both for correctly aligning the pinching position of the fabric 50 within the fingers, and both guides 35 and 30 are approximately L-shaped, and a part of the middle part thereof is pivoted 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 FIG. 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. In the figure, reference numerals 21 and 34 indicate air injection nozzles which are placed on the moving path of the tape-shaped fabric 50 as necessary 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 becomes wavy and uneven during movement, causing the ruler guide 1
In such a case, pressurized air is injected from these nozzles 21 and 34 to assist the smooth movement of the air. The nozzle 34 close to the clip member 29 is controlled in synchronization with the stop of the drive roller 23, but the spraying is stopped at the same time as the clip member 29 starts clamping the fabric.
It may be used as needed, and it is not necessary to use it for tape-shaped fabrics 50 that are not likely to become clogged or stagnate. In addition, the reference numeral 63 in FIG. 2 indicates a drive motor for the drive roller 23 for feeding the dough, but of course this roller 2
Other prime movers can also be used for the rotational drive in No. 3. Further, in FIGS. 7 and 8, reference numeral 64 indicates that when the annular tape body 53, which is a completed product that has undergone the required sewing on the sewing table 1a, is pushed out of the sewing table 1a by the extrusion member 4, the tape A receiving and transferring rod 64 is shown for receiving the body 53 and moving it to the target position, and the rod 64 is rotatably supported by a rotating member 65 such as a rotary cylinder, so that it is pushed out from the end of the sewing table 1a. The annular tape body 53 pushed out by the member 4 is received as shown in the figure and moved to the 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 located in front of the cutting cutters 24 and 25, the movable cutter 24 is in the raised position via the cylinder 37, and the pair of clip members 2
7, 29, each fixed finger 27a, 29
a, the opening/closing fingers 27b and 29b are the first
As illustrated in FIG. 2, the positioning correction guides 35, 30, which are in the open position by the respective opening/closing cylinders 41, 41 and located on the outside of each of the clip members 27, 29, are also operated by the actuating members 36, 3.
3, it is supported at the position shown by the solid line in FIG. From this neutral position, as shown in Figures 4A and 4B, the ruler guide 13 moves forward from the X position in Figure A to the Y position in Figure 4 through the operation of the compound cylinders 11 and 12. The front end of the clip passes between the fingers 27a and 27b of the clip member 27 and stops at a position close to the fingers 29a and 29b of the clip member 29. Next, a drive roller 2 for feeding the fabric
3, the continuous tape-shaped fabric 50 is sent out via the roller 23 and the driven roller 18.
As shown in FIG. When detected, the rotation of the drive roller 23 is stopped and the feeding of the tape-like material 50 is stopped. Next, by retracting the piston rod 41a of the cylinder 41, the opening/closing finger 29b in the open state of the clip member 29 is opened.
9b is the pivot point 44 as shown in FIG.
Both fingers 29a, 29 are swung using the fulcrum as a fulcrum and closed to the fixed finger 29a side.
In this case, as illustrated in FIG. 13, the positioning correction guide 3 provided on the outside of the clip member 29
By swinging the guide 30 about the pivot shaft 61 by the operating member 33, the guide 30 moves from the solid line position to the dotted line position in the figure.
This allows the free end of the end 51a held between the fingers 29a and 29b to be attached to the finger 29.
The alignment is corrected so that it is held in a correct orthogonal position to a and 29b. After completing the correction of the end portion 51a in this way, as shown in FIG. 4D, the clip member 29 holding the end portion 51a is attached to the slide bracket 47 as previously explained in FIG. The gear 5 is rotated by the rotary drive member 54 provided.
By rotating the clip shaft 45 by 180 degrees through the clips 5 and 56, the clip member 29 is rotated, and the upper finger 29a is set as the lower part, the lower finger 29b is set as the upper part, and the clamped end portion 51a is held as shown in the figure. It is reversed toward the other clip member 27, and at the same time, the rotation of the fabric delivery drive roller 23, which had been stopped, is restarted to feed out the tape-shaped fabric 50, and at the same time, the ruler guide 13 is moved to the fourth position.
The guide 13 is retracted from the clip member 27 by retreating from the Y position shown in FIG. Let it happen. When lowering this pull-out member 26, the fifth
As explained in Figures A and B, the drawer member 26
In the positioning shaft 28 into which the tension block 26a is slidably inserted, the tension block 26a
By lowering the piston rod of the lifting cylinder 39, the support plate 38 supporting the block 26a and the drawer member 26, which are unsupported by the support plate 38, are lowered by their own weight. , both clip members 2
The tape-shaped fabric 50 extending between the clip members 7 and 29 is engaged from above, and the fingers 27a and 27b between the clip members 27 are opened, so that the fabric 50 is pulled down as shown in FIG. 4E. When the pull-out member 26 descended in this way reaches any of the proximity switches 59 at positions corresponding to a predetermined length, the switch 5 is pulled out.
9 and the sensing member 58, the rotation of the drive roller 23 for feeding the fabric is stopped, the feeding of the tape-shaped fabric is stopped, and the lowering of the pull-out member 26 is also stopped at this position. Become,
In this way, constant length delivery of the tape-like fabric 50 is obtained,
By using the number of proximity switches 59 and the switches 59 above or below, the delivery length of the fabric 50 can be adjusted as desired. 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 holding the tape-like fabric 50 on the clip member 27 side as well, the ruler guide 13, which had retreated to the Z position in FIG.
is further retreated to the original X position shown in FIG. The positioning guide 35 provided on the outside of the ruler is operated in the same manner as the positioning guide 30 in the clip member 39 as illustrated in FIG.
By properly aligning the 0 portion and lowering the movable cutter 24 by operating its lifting cylinder 37, the rear end of the fabric 50 is cut. As a result, both the clip members 27 and 29 connect the end portion 51a, which is the front end of the cutter 2, to the cutter 2.
A tape-shaped fabric 50 of a fixed size is obtained, with the end portion 51b, which is the rear end of the feed cut cut by the lines 4 and 25, being sandwiched. 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. Then the fourth
As shown in FIG. Rotate 180 degrees through clip member 2 (however, the direction of rotation is
9), the lower finger 27b is turned upward and the upper finger 27a is turned downward, and the end portion 51b is turned toward the clip member 29, so that it is first attached to the clip member 29. Therefore, the end portion 51b is folded over the inverted end portion 51a to form an overlapping posture,
Here, the ends 51a and 51b are overlapped, and a cut annular tape fabric piece 51 of a fixed size, which is formed into a substantially annular shape and which is held by both the clip members 27 and 29, is obtained.

The annular tape fabric piece 51 held by both the clip members 27 and 29 in this manner is then transferred to the sewing table 1a on the sewing machine side by the synchronized movement of both the clip members 27 and 29, 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. , go 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, 5 sandwiched by 7, 29
1b is located on the sewing surface, and the free annular portion extending between the clip members 27 and 29 is located on 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 sewn. The wrapping of the annular tape fabric piece 51 to the sewing table 1a side by the clip members 27 and 29 is completed until it is blocked by the fixed positioning guide 5 erected on the plate 8 on the table 1a. 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 moved by the moving cylinder 9.
By pushing the other side in the width direction of the overlapping ends 51a, 51b carried in by b, both the overlapping ends 51a, 51b are unevenly aligned in a correct straight line between them and the fixed positioning guide 5. After that, the sewing machine presser foot 6 is lowered to align and position the aligned overlapping ends 51a and 51b on the sewing surface (throat plate 1b) as previously explained in FIG. , square window hole 8a of plate 8
After pressing the clip member 27, it is returned to its original position by the positioning correction guide 10, and then both clip members 27,
29, the upper opening/closing fingers 27a, 27b are opened upward, and both clip members 27, 29 are attached to the fabric piece 51.
By releasing the clip members 27 and retracting them from the T position to the S position in FIG.
Since the clip members 29 return to their original positions, the clip members 27, 29 are rotated 180 degrees again at the return position.
is prepared for the next circular forming of the tape-shaped dough, and the pull-out member 26, which had been raised to the position of the intermediate proximity switch 60, is also raised further and returned to its previous position to prepare for the next fixed length of the tape-shaped dough 50. Prepare for sending out. Incidentally, FIG. 4 H shows the above-mentioned state in which the annular tape fabric piece 51 is placed over the sewing machine table 1a, and FIG. It shows the condition.

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, by simply reversing and rotating the pair of clip members 27 and 29 that circularly grip both ends of the long tape-like cloth 20, both ends 51a of the long tape-like cloth 20,
51b in a polymerized state to form the annular tape fabric piece 51.
50998), a holding clip member,
Compared to those that form a ring-shaped dough using members that operate differently, such as a reversing plate, a clamping member, and a presser member,
This annular formation becomes extremely simple. Therefore, by employing the method of the present invention, the movement of the entire device can be simplified and downsized, and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the annular forming mechanism for a long tape-like fabric according to the present invention, FIG. 2 is a front view of an embodiment of the entire apparatus including the sewing machine, and FIG. 3 is an embodiment of the method, showing each member. FIG. 4 is an explanatory diagram of the order of operation of the embodiment of the same method, 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, Figure 8 is an explanatory diagram of the operation of the main part of the product discharge, Figure 9 is a slope view of a part of the sewing table, Figure 10 is a slope view of an example of the circular fabric according to the present invention, and Figure 11 is the main part of the standard bar. 12 is a side view of the essential part of the finger of the clip member, and FIG. 13 is a side view of one example of the positioning correction guide. 50... Tape-shaped fabric, 51... Circular tape fabric piece, 51a, 51b... Tape end, 52a, 52
b... Sewing part, 53... Annular tape body, 13... Ruler guide, 23... Drive roller for sending out, 24, 25... Cutting cutter, 27, 29... Clip member, 27
a, 27b, 29a, 29b...finger, 26
...Drawer member, 1...Sewing machine head, 1a...Sewing table.

Claims (1)

[Claims] 1. A pair of clip members 27 and 29 arranged a predetermined distance apart in the horizontal direction grip a long tape-like fabric 50 of a predetermined length with both ends 51a and 51b remaining a predetermined length, and the pair of clip members 27,
29 in opposite directions to overlap both ends 51a and 51b of the fabric 50, the long tape-shaped fabric 50 is formed into a circular tape fabric piece 51, and then the fabric piece 51 is A method for sewing a circular fabric characterized by sewing overlapping parts.