JP2012135335A - Three-fold sewing device and three-fold sewing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-fold sewing device which is excellent in workability by allowing an end edge of cloth to be folded in three and sewn by three-fold sewing with high precision, enhances product quality by sewing the end edge of the cloth in a complete three-fold state having a common folding width to have a uniform thickness of a three-folded part, and gives good appearance to a product by allowing the three-fold sewing to be performed from a front side of the cloth.SOLUTION: A three-fold sewing device comprises a table main body 11, a first folding plate 15, a second folding plate 19, a first support plate 13, a second support plate 17, suction means 21, cloth transferring means, and a sewing machine. Cloth is placed on the second folding plate 19 on one side of the table main body 11, and placed on the first folding plate 15 in such a state that an end edge of the cloth is positioned by a width between the first support plate 13 and the second support plate 17, and set in such a state that a folding line is formed along a tip end of the first support plate 13 by suction of the suction means 21. The end edge of the cloth is folded at the folding line by the first folding plate 15 moving to a side of the second folding plate 19, and then folded in a three-fold state by moving the second folding plate 19 to a side of the first folding plate 15 to form a temporary three-fold state, and the temporary three-fold portion of the cloth transferred by the cloth transferring means is linearly sewn by the sawing machine as three-fold sawing.

Description

  The present invention has three cloth edges, such as a cutter shirt pocket, a lower front body where buttons are sewn, an upper front body where buttonholes are formed, a towel edge, a handkerchief edge, etc. The present invention relates to a three-roll stitching device and a three-roll stitching method for sewing by overlapping.

  In order to perform three-roll stitching in which the edge of each of the above-mentioned various fabrics is piled up three times, for example, as shown in Patent Document 1, the other end side is a feed-side edge portion of the backing plate on a needle plate for three-roll stitching. A three-winding guide with a winding part that protrudes upward from the notch part formed on the side and has a substantially spiral shape when viewed from the feeding direction at the protruding side end and gradually decreases in diameter toward the feeding direction. The cloth is sewn while being wound in a three-winding state immediately before the needle drop position of the needle plate by the three-wind guide.

  As a specific method of sewing using the above-mentioned three-roll guide, as shown in Non-Patent Document 1, the edge of the fabric is tri-folded in advance, and if necessary, creases and creases as necessary, and then 3 to 4 stitches The three-turn sewing is carried out by sewing in such a manner that it is sewed inward in a state of being tangled in a three-roll guide by linear sewing.

  However, in the case of three-roll sewing using a three-roll guide as described above, it is necessary to work to twist inward in a state of being entangled with the three-roll guide, and a high level of skill is required. The operator with low skill level could not sew three rolls with high accuracy. In addition, it was possible to sew only in an incomplete three-roll state in which the folded width of the fabric edge was narrower than other folded widths. For this reason, in the three-roll sewing part, the cloth thickness becomes non-uniform and the product quality is poor. In addition, when using the above-mentioned three-roll guide to sew three turns, sewing can only be performed from the back side of the fabric, and the perforation due to the lower thread appears on the front side of the product, resulting in a problem that the appearance of the product is poor. is doing.

JP 2001-300194 A

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  The problem to be solved is that, in the case of three-roll sewing using a three-roll guide, a high skill level is required. Therefore, an operator with a low skill level cannot perform three-turn sewing with high accuracy. In the point. In addition, since the folding width of the fabric edge is narrower than other folding widths, it can be sewn only in an incomplete three-roll state, so the cloth thickness of the three-roll sewing part becomes uneven and the product quality is poor. In the point. Further, when three-roll sewing is performed using a three-roll guide, sewing can be performed only from the back side of the fabric, and a perforation due to a lower thread appears on the front side of the product, which deteriorates the appearance quality of the product.

  According to a first aspect of the present invention, when the front ends of the table main body are moved away from each other on the first and second support plates which are spaced from each other so as to coincide with the folding width of the cloth, the folding is performed. The first and second folded plates that overlap the leading edges of the width and fold the edge of the fabric into three folded layers with the folded width, and the first and second folded plates move toward and away from each other. A suction means for sucking the fabric set on the table surface between the first and second folded plates moved in a direction away from each operating member and forming a fold along the tip of the first support plate; The fabric transfer means for transferring the fabric whose end edges are folded back by the first and second folded plates to the other side of the table body, and the fabric edge transferred by the fabric transfer means from the end Location with a width A sewing machine that sews in a straight line and sews three times, and a three-roll fabric accumulation means that accumulates the fabric transferred to the other side of the table main body by the cloth transfer means, and a second on one side of the table main body. The first support plate is placed on the folded plate and the edge is positioned with a width between the first and second support plates with respect to the first folded plate, and is sucked by the suction means. After the fabric edge set in a state in which a crease is formed along the tip of the fabric is folded back by the first fold plate moved to the second fold plate side, the second fold plate is moved in the state. Move to the first folding plate side, fold back into a three-ply state, form a temporary three-winding state, and in this state, the temporary three-winding portion of the fabric transferred by the cloth transferring means is linearly sewn with a sewing machine and then three-winding sewing Doing is the main feature.

  According to a sixth aspect of the present invention, the edge of the fabric set on one side of the table body is attracted to the table surface to form a crease, and the first folding plate is moved so that the edge is moved to the crease with a predetermined width. After the folding, a step of moving the second folding plate with respect to the folded edge and folding the other ground toward the first folding plate to form a temporary three-roll portion having three overlapping edges, It consists of a step of sewing the temporary three-roll portion while transferring the fabric on which the three-roll portion is formed, and three-step sewing, and a step of accumulating the fabric that has been three-turned and transferred to the other side of the table body. This is the main feature.

  According to the present invention, even an operator having a low skill level can superimpose three edges of the fabric with high accuracy and sew three times, and is excellent in workability. In addition, the edge of the fabric can be sewn in a complete three-winding state with the same folding width, and the thickness of the three-winding portion can be made uniform to improve product quality. Furthermore, three rolls can be sewn from the front side of the fabric, and the appearance of the product can be improved.

It is a top view of a triple winding sewing device. It is a front view of three winding sewing. It is explanatory drawing of a provisional three volume formation means. It is explanatory drawing of a cloth transfer means. It is explanatory drawing of the part of a three volume fabric collection means. It is explanatory drawing which shows the set state of a fabric edge. It is explanatory drawing which shows the folding | turning state of the fabric edge by the movement of a 1st folding plate. It is explanatory drawing which shows the return state of the fabric edge by the movement of a 2nd return plate. It is explanatory drawing which shows the press state of the temporary 3 volume part by a press member. It is explanatory drawing which shows the hot press state of the three-roll part by a heating and pressing means. It is explanatory drawing at the time of taking out fabric from a table main body. It is explanatory drawing which shows the accumulation state of a fabric.

  Placed on the second folded plate on one side of the table body, and placed with the edge positioned on the first folded plate in the width between the first and second support plates, After folding the fabric edge set in a state in which a fold is formed along the tip of the first support plate by suction by the suction means by the first folding plate moving to the second folding plate side, In this state, the second folded plate is moved to the first folded plate side, folded into a three-ply state, formed into a temporary three-wind state, and the temporary three-wind portion of the fabric transferred by the fabric transfer means in this state The best mode is to perform three-turn sewing by straight stitching with a sewing machine.

The present invention will be described below with reference to the drawings showing examples.
As shown in FIGS. 1 to 5, a three-wind stitching device 1 that embodies the three-roll stitching method is a temporary three-wind forming means 3, a fabric transport that transports the fabric formed with the temporary three-wind portion to the sewing machine 5 side. It comprises means 7 and three-roll fabric accumulating means 9 for accumulating the three-stitched fabric by heat-pressing.

  The temporary three-roll forming means 3 extends on the table main body 11 in the longitudinal direction, and is disposed on the first and second support plates 13 and 17 that are relatively disposed with an interval that coincides with the folding width of three turns described later. The first and second folded plates 15 and 19 that are supported so as to move in a direction toward and away from each other, and a lower surface of the table body 11 are provided, and the first and second folded plates 15 and 19 are connected to each other. Air is sucked from the suction holes 11a formed in the lower surface of the table main body 11 between the operating members 27 and 29 such as an air cylinder moving in the approaching direction and the moving away direction and the first and second support plates 13 and 17. It comprises suction means 21 for forming a fold.

The second support plate 17 allows the second folded plate 19 to overlap the first folded plate 15 moved in a direction in which the first folded plate 15 approaches the edge of the second support plate 17. The first support plate 13 has a thickness that is slightly higher than the first support plate 13.
The suction means 21 includes a table main body 11 between an opening 11 b formed in the table main body 11 along the edge of the first support plate 13 facing the second support plate 17 and the first and second support plates 13 and 17. The suction box 21a covers a large number of suction holes 11a formed on the suction box 21 and an exhaust device (not shown) such as a blower connected to the suction box 21a. The suction means 21 draws the fabric 31 set on the first and second folded plates 15.19 by sucking a large volume of air from the opening 11b compared to the suction holes 11a. A fold is formed by strong suction along the direction edge.

  A plurality of air injection holes 20 connected to a compressed air supply source (not shown) are provided in the second folded plate 19 at an appropriate interval in the longitudinal direction, and compressed air is supplied to the first folded plate 15. It is provided to inject to the side. The compressed air ejected from each air ejection hole 20 is folded in reverse by a cloth 31 described later in cooperation with the second folding plate 19.

  On the first folded plate 15, there is a ruler surface extending in the longitudinal direction from the edge opposite to the second folded plate 19 at a position spaced from the first and second support plates 13, 17. The ruler plate 18 is attached. When setting the fabric 31, the ruler plate 18 sets the fabric 31 by aligning the end of the fabric 31 with the ruler surface. Further, the three-winding sewing device 1 includes a laser marking means (not shown) that linearly irradiates laser light of visible light color on the table surface along the end of the first support plate 13 facing the second support plate 17. When the fabric 31 is set, the fabric 31 is positioned so as to coincide with the irradiated laser beam. The irradiation of the laser beam by the laser marking means is particularly effective for positioning the fabric 31 having a linear pattern (stripes).

  A sewing machine 5 is disposed at the center of the table body 11 in the longitudinal direction, and the sewing machine 5 linearly extends in the longitudinal direction a temporary three-winding portion formed at the edge of the fabric 31 transferred by the fabric transfer means 7. And sew three turns. Since the sewing machine 5 has a conventionally known structure, a detailed description thereof will be omitted.

The fabric transfer means 7 is provided at the front end portion of the mounting frame 32 erected so as to be positioned above the sewing machine 5, and extends in the longitudinal direction at a length that is approximately ½ of the transfer distance of the fabric 31. A first transfer frame 33; a traveling body 37 supported to move in the longitudinal direction on a guide rail 35 attached so as to extend in the longitudinal direction with respect to the first transfer frame 33; and the traveling body 37, a numerically controllable first electric motor 41 in which a pinion gear of an output shaft meshes with a rack gear 39 provided in the longitudinal direction with respect to the first transfer frame 33, and provided in the traveling body 37. A guide rail 45 supported so as to be movable in the longitudinal direction with respect to the linear guide member 43 is provided, and is attached to the traveling body 37 and a second transfer frame 47 having a length matching the longitudinal direction of the fabric 31. Is, the pinion gear of the output shaft to Rakkugya 49 provided extending in the longitudinal direction becomes a speed structure and a second electric motor 51. a meshed numerical controllable with respect to the second movable frame 47.

Although the cloth transfer means 7 is a double speed mechanism having the above-described structure, the holding frame having the horizontal length matching the cloth 31 is moved in the horizontal direction with respect to the horizontal frame having the horizontal length corresponding to the transfer distance of the cloth 31. A constant velocity mechanism provided as described above may be used.

A swing support member 50 is pivotally supported at both longitudinal ends of the second transfer frame 47 so that the swing support member 50 swings, and the swing arm 53 moves vertically in the swing support member 50. Supported. Each swing support member 50 is connected to a swing operation member 55 such as an air cylinder or an electromagnetic solenoid having rods attached to both ends of the second transfer frame 47 in the longitudinal direction. The swing support member 50 is swung to a vertical position and a front position illustrated. The swing arm 53 supported by each swing support member 50 is connected to a pressing operation member (not shown) such as an air cylinder or an electromagnetic solenoid, and a pressing plate 57 (to be described later) is attached to the table surface by the pressing operation member. Is moved up and down between a position close to the position and a position spaced upward.

In addition, a pressing plate 57 that presses a temporary three-winding portion to be described later at a horizontal length longer than the length in the longitudinal direction of the fabric 31 is provided at the distal end portion (lower portion) of the swing arm 53. A needle groove 57a extending in the left-right direction shown in the drawing is formed in the intermediate portion in the front-rear direction of the presser plate 57 according to the needle position of the sewing machine 5, and the temporary three-winding portion is sewn by the sewing needle passing through the needle groove 57a. Is done.

On the front side of the table main body 11 shown in the figure, a three-roll fabric accumulating means 9 is arranged. The three-wind fabric accumulating means 9 includes a pressurizing body 63, an accumulating frame 67, and a take-out frame 69. That is, a pair of left and right mounting shaft members 59 is provided on the table body 11 corresponding to the rear of the pressing plate 57 moved to the accumulation position, and the fabric 31 is provided on the mounting plate 61 provided between the mounting shaft members 59. The heating and pressing body 63 having a horizontal length corresponding to the length in the longitudinal direction is supported by the guide shaft 64 so as to move up and down between a lower position pressed against the table surface and an upper position spaced apart. The heating and pressing body 63 is attached with a rod of an upper and lower member 65 such as an air cylinder provided on the mounting board 61 and is moved up and down by the operation of the upper and lower member 65. The heating and pressing body 63 incorporates an electric heating member such as a planar heater, and heats the pressing surface against the fabric 31 to a required temperature.

Further, the table body 11 corresponding to the heat-pressing body 63 has a pair of left and right first rocks having an accumulation bar 67a having a front face that is horizontally U-shaped and having a length corresponding to the longitudinal width of the fabric 31 at the top. The lower part of the moving arm 67 is supported so as to swing. The swing arm 67 is connected to a rod of a first swing operation member 69 such as an air cylinder provided in the table main body 11, and the first swing arm 67 is operated by the operation of the first swing operation member 69. It is reciprocally swung between a position approaching the table body 11 and a position moving away from it.

A lower portion of the second swing arm 71 having a take-out bar 71a that coincides with the accumulation bar 67a at the tip end is supported on the middle portion in the longitudinal direction of the first swing arm 67 so as to swing. The second swing arm 71 is connected to a rod of a second swing operation member 73 such as an air cylinder provided on the table body 11, and the first swing arm 73 is operated by the operation of the second swing operation member 73. 67, the second swing arm 71 is reciprocally swung between a position where the second swing arm 71 approaches and a position where the second swing arm 71 moves away. Note that a friction body (not shown) such as rubber (foam rubber) is attached to the accumulation bar 67a of the first swing arm 67, and the three-stitched fabric that is accumulated in a suspended state on the accumulation 37a. 31 is prevented from sliding off.

  Next, a description will be given of a three-winding sewing operation and a three-winding sewing method for the edge of the fabric 31 by the three-roll sewing device 1. First, an operator sews a pocket and a button of a cutter shirt in which the edge is sewn three times. With the lower front body to be worn and the cloth 31 such as a towel or handkerchief placed on the second folded plate 19, the front end is pressed against the ruler surface of the ruler plate 18 on the first folded plate 15 Set in the state. In addition, in order to sew the fabric 31 with three complete rolls, it is necessary to make the mutual space | interval of the 1st and 2nd support plates 13 * 17 and the said take-out width correspond.

At this time, a part of the fabric 31 positioned between the first and second support plates 13 and 17 is adsorbed and held on the table surface by the air sucked from the suction holes 11a and is also sucked from the openings. The air is strongly sucked by the air and is held so as to form a fold along the end of the first support plate 13. (See Figure 6)

Next, when a start switch (not shown) is operated in the above-described state, the first folding plate 15 is moved toward the second folding plate 19 by the actuating member 27, and the front edge of the fabric 31 is moved. It folds along the crease with a width between the first and second support plates 13 and 17. At this time, a crease is formed along the tip of the first support plate 13 at the front end edge of the fabric 31, so that the front end edge is surely moved toward the second support plate 17 as the first folding plate 15 moves. And can be folded back into a straight line with high accuracy. (See Figure 7)

Next, the second folded plate 19 is moved to the first folded plate 15 side by the actuating member 29 operated in the above state, and the fabric 31 is moved along the leading end folded by the first folded plate 15 to the first. The fabric 31 is folded back to the support plate 13 side, and the front edge of the fabric 31 is formed into a three-ply temporary roll shape. At this time, with the movement of the second folding plate 19 with respect to the front, compressed air is ejected from the air injection holes 20 and the fabric 31 on the second folding plate 19 side is folded back while being reversed to the first support plate 13 side. Further, when the fabric 31 is folded back toward the first support plate 13, a crease can be formed by the front end of the moved first folding plate 15, and can be folded linearly with high accuracy. (See Figure 8)

  Next, in the above state, the first and second electric motors 41 and 51 are driven to move the traveling body 37 to the first transfer frame 33 and the second transfer frame 47 to the traveling body 37. After moving to the winding forming means side and positioning the pressing plate 57 above the first and second folded plates 15 and 19 moved in a direction approaching each other, the operating members 27 and 29 are moved backward in this state. Then, the first and second folded plates 15 and 19 are returned to the respective standby positions, and the pressing operation member is operated at a timing substantially synchronized with or slightly delayed from the timing at which the first and second folded plates 15 and 19 are returned. Then, the pressing plate 57 is moved downward to press the fabric 31 of the provisional three-winding portion. (See Figure 9)

  Next, the first and second electric motors 41 and 51 are moved backward to move the pressing plate 57 to the sewing machine 5 side, and the cloth 31 pressed on the table surface is slid in the needle position direction of the sewing machine 5. The front edge shown in the figure of the temporary three-winding portion of the fabric 31 is sewed in a straight line by the sewing needle passing through the needle groove 57a of the pressing plate 57.

  Then, when the cloth 31 that has been sewed and wound three times with the movement of the pressing plate 57 is transferred to the three-winding cloth accumulating means 9 side, the pressing operation member is moved backward to press the pressing plate 57. Is moved upward to release the pressure on the three-winding portion, and then the swinging operation member 55 is operated to swing the pressing plate 57 to the front side in the drawing to retract the pressing plate 57 from the three-winding portion of the fabric 31. Let Further, the upper and lower members 65 are actuated at the timing of retracting the pressing plate 57 to lower the heating and pressing body 63 and press and heat the temporary three-winding portion of the fabric 31 for a required time to remove the three-winding portion. Hot press. (See Figure 10)

  When the three rolls of the fabric 31 are hot-pressed, the first and second swinging arms 67 and 71 are moved back by the first and second swinging operation members 69 and 73 so that the collecting bar 67a and the take-out bar are removed. The bar 71a is in a state of being close to each other and waiting in a state of being positioned below the table surface in the table main body 11. Further, the opposite side of the fabric 31 from the three winding portions is located on the front side of the take-out bar 71a located below the table surface, and is hung from the table surface.

Next, when the predetermined time has passed and the three-roll portion is hot-pressed in a substantially flat shape, the upper and lower members 65 are moved back to move the heating and pressing body 63 upward to change the pressed state of the three-roll portion. Release the hot press and operate the first and second swing operating members 69 and 73 respectively to swing the first and second swing arms 67 and 71 integrally forward to collect the stacking bar 67a and After the fabric 31 stretched over the take-out bar 71a is separated from the table surface of the table main body 11 (see FIG. 11), the first swinging operation member 69 is moved backward to connect the first swinging arm 67 to the table main body 11. Swing to the side. At this time, the operating state of the second swinging operation member 73 is maintained and the swinging state of the second swinging arm 71 with respect to the front is maintained, so that the first swinging arm 67 swinging toward the main body table 11 side is used. The fabric 31 is taken out from the arm 71a and is held only by the accumulation bar 67a to be accumulated. (See Figure 12)

After the above operation, the second swinging operation member 73 is moved backward to swing the second swinging arm 71 downward on the table surface of the table body 11 and returned to the standby position, and the stacking bar 67a is moved to the standby position. The cloth 31 that has been stretched and held is taken out by the take-out bar 71a to maintain the accumulation state.

  In the present embodiment, even an operator having a low skill level can sew the edge of the fabric 31 in a three-roll state in a short time, and the work efficiency of the three-roll sewing can be improved. Further, the three-roll portion can be sewn in a complete three-roll state with the same folding width, and the thickness of the three-roll portion can be prevented from becoming uneven.

DESCRIPTION OF SYMBOLS 1 Three roll sewing apparatus 3 Temporary three roll formation means 5 Sewing machine 7 Cloth transfer means 9 Three roll cloth accumulation means 11 Table main body 11a Suction hole 11b Opening 13 1st support plate 15 1st return plate 17 2nd support plate 18 Ruler plate 19 Second folding plate 20 Air injection hole 21 Suction means 21a Suction box 27/29 Actuating member 31 Fabric 32 Attachment frame 33 First transfer frame 35 Guide rail 37 Traveling body 39 Rack gear 41 First electric motor 43 Linear guide member 45 Guide rail 47 Second transfer frame 49 Rack gear 50 Swing support member 51 Second electric motor 53 Swing arm 55 Swing operation member 57 Press plate 59 Mounting shaft member 61 Mounting plate 63 Heating and pressing body 64 Guide shaft 65 Vertical member 67 First swing Moving arm 67a Accumulation bar 69 First swinging operation member 71 Second swinging arm 71a Extraction bar 73 Second swing actuating member

Claims (7)

On the one side of the table body, when the tips are moved in a direction approaching each other on the first and second support plates, the tips of which are spaced from each other so as to avoid disposition by matching the folding width of the fabric, First and second folded plates that overlap and fold the edge of the fabric into three folded layers with the folded width;
Respective actuating members that move in a direction toward and away from the first and second folded plates;
A suction means for sucking the fabric set on the table surface between the first and second folded plates moved in a direction away from each other to form a fold along the tip of the first support plate;
Cloth transfer means for transferring the cloth whose edges are folded back by the first and second folded plates to the other side of the table body;
A sewing machine that sews the fabric edge transferred by the fabric transfer means in a straight line from the end at a place where the folded width is placed and sews three times;
Three-roll fabric accumulation means for accumulating the fabric transferred to the other side of the table body by the cloth transfer means;
Is mounted on the second folded plate on one side of the table body, and the edge is positioned with respect to the first folded plate in the width between the first and second support plates. The fabric edge set in a state in which a fold is formed along the tip of the first support plate by suction by the suction means is folded back to the fold by the first folding plate moving to the second folding plate side. After that, in this state, the second folded plate is moved to the first folded plate side, folded back into a three-ply state, formed into a temporary three-roll state, and the temporary transfer of the fabric transferred by the fabric transfer means in this state. A three-roll stitching device that sews the winding part in a straight line with a sewing machine. 2. A heat pressing means for heating and pressing the three rolls of the fabric transferred by the cloth transfer means is provided on the other side of the table body, and the three rolls are hot pressed by the heating and pressing means. Three roll sewing device to do. In any one of Claim 1 and 2, the air injection means which injects compressed air to the 1st folding plate side is provided in the 2nd folding plate side, and when the fabric is folded by the movement of the 2nd folding plate, A three-wind stitching device that reverses the fabric by inverting the fabric toward the first folded plate by the compressed air that is jetted. 3. The triple winding sewing device according to claim 1, wherein the cloth transferring means includes a pressing member, and presses and slides the three roll portions of the cloth set in a three roll shape with respect to the table surface. The cloth transfer means according to claim 2, further comprising a pressing member that swings in a direction perpendicular to the transfer direction of the cloth, and presses and slides the three roll portions of the cloth set in a three roll shape with respect to the table surface. On the other hand, when the three rolls of the fabric are positioned on the heating and pressing means, the three-stitch sewing is performed so that the pressing member swings in a direction perpendicular to the transfer direction of the cloth and does not interfere with the heating and pressing means. apparatus. After the edge of the fabric set on one side of the table body is attracted to the table surface and a crease is formed, the first folding plate is moved, and the edge is folded back to a predetermined width by the crease and then folded. A step of moving the second folded plate with respect to the end edge and folding the other ground toward the first folded plate side to form a temporary three-roll portion having three overlapping edges;
A process of sewing the temporary three-roll portion while transferring the fabric on which the temporary three-roll portion is formed, and sewing three volumes;
Collecting the fabric that has been stitched three times and transferred to the other side of the table body;
A three-roll sewing method consisting of 7. The three-winding sewing method according to claim 6, wherein a step of forming the three-winding portion of the fabric into a flat shape by heat-pressing when the three-sewn fabric is accumulated is formed.

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