JPH07246293A - Automatic sewing device - Google Patents

Abstract

PURPOSE:To enable sewing, which does not require any margin tape, by securing a space at a presser metal so that the projecting object of a fastener can not be an obstacle and forming a guide groove on a needle plate in the case of forming a cylindrical object by directly sewing the fastener with a slider and a metal fitting together with one side of rear side cloth or front side cloth. CONSTITUTION:On a needle plate 8a of an electric sewing machine for forming the cylindrical object by directly sewing a fastener 7 together with one side of rear side cloth, a guide groove 8b is formed in a lengthwise direction with certain depth so that a slider 7b, insect 7c and metal fitting of the fastener 7 can be passed through. The fastener 7 is sandwiched by a presser metal 8d and the needle plate 8a, a pair of sewing machine needles 8f enter and leave a long hole 8g, and sewing is executed while feeding the fastener 8e with a feeding gear 8e. Concerning the front side cloth, sewing is similarly executed as well. Thus, sewing is executed not to laterally shake the fastener 7 without requiring any margin tape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sewing device,
More specifically, the present invention relates to an automatic sewing device for sewing a tubular body by using an electric sewing machine to sew both side edges of a front material and a lining using fasteners as a pre-step for sewing a bag-shaped body such as a duvet cover. .

[0002]

2. Description of the Related Art A duvet cover is usually provided with an opening at one side in the longitudinal direction of the duvet for putting in and taking out the duvet, and a fastener is provided here or a plurality of knots are provided. Recently, fasteners that are easy to handle are commonly used.Therefore, when sewing a duvet cover or the like, it is necessary to form a bag-like body provided with the fasteners. It was done by work. However, recently, a method and apparatus for automatically sewing a bag-like body used for such a duvet cover have been considered.

The sewing method and device were as follows. (1) When sewing a fastener, the long outer material is positioned on the lower side, the long lining material is positioned on the upper side, the front surface of the outer material faces upward, and the back of the lining material faces upward. 2) Fold one side edge of the outer material toward the back side by a predetermined width substantially corresponding to the fastener width, and attach one side edge of the long fastener to the electric sewing machine (usually 4) near the inner end of the folded piece. Sequentially sewn by double chain stitching with a main needle), and the fold-back piece is sewn so as to form a loop-shaped fold-back portion (which serves as a blindfold (cover) for the fastener after completion) in a cross-sectional view, (3) Simultaneously with this sewing, with the loop-shaped folded-back portion raised from the sewn-in portion of the fastener, one side of the lining is attached to the other side edge of the fastener by the electric sewing machine (double-loop stitch with four needles). Side edge Interlock contact (e.g., Japanese Patent Application No. 5 over No. 141,475) sequentially sewn, sewn tubular body zipper, (4) after such step,
A method of cutting the sewn tubular body to a required length, sewing the front and rear ends thereof with an interlock, and then turning the bag-shaped body inside out was adopted.

In particular, as disclosed in Japanese Patent Application No. Hei 5-141475, the fastener can be sewn on the outer material and the inner material in a state where the gusset tape is omitted, which results in a significant cost reduction. The fastener could not be completed as a fastener unless the clasp (with a required interval) and the slider were attached after the stitching was completed on the front and back fabrics. Therefore, recently, in order to further simplify the fastener sewing operation, there has been a demand for what is called a completed fastener to be sewn in the above-described automatic sewing device that does not require a gusset tape. .

[0005]

However, if the fastener with a slider is applied to such a conventional sewing method and device, the lower surface of the slider and the lower surface of the stopper plate are electric sewing machines, especially fasteners. The zip sewn with the lining is abutted on the upper surface of the needle plate of the electric sewing machine of the interlock to raise the fastener, and unlike the conventional fastener in which there is simply a thin muscular portion of the fastener, A situation occurs in which the fastener moves laterally with respect to the traveling direction of the lining, making the posture of the fastener unstable and making it difficult to perform good stitching at an appropriate position. In addition, the slider protruding above the fastener may come into contact with the presser foot.
Such a problem also occurs in an electric sewing machine (four-needle double chain stitch) for sewing a dress material and a fastener.

In view of the above-mentioned problems of the prior art, the present invention, when sewing a bag-like body (cylindrical body) used for a duvet cover or the like, a fastener and a slider that connect the outer material and the lining without a gusset tape, are used. An object of the present invention is to make it possible to perform accurate suturing stably while making it possible to use a fastener with a clasp, thereby simplifying the sewing process and reducing the cost.

[0007]

In order to achieve the above-mentioned object, an automatic sewing device according to the present invention has a long dress material positioned on the lower side and a long lining material positioned on the upper side. With the front side facing up and the back side of the lining facing upwards, taken out in parallel with each other, one side edge of the front side is turned toward the back side and folded back by a predetermined width substantially corresponding to the fastener width, near the inner end of the folded piece. One side edge of a long fastener is sequentially sewn by an electric sewing machine and sewn so that the folded piece forms a loop in a sectional view, and then the loop is erected from the sewn portion of the fastener and the width of the outer material. Fold back to the center side in the direction, and in this state, one side edge of the lining is sewn directly to the other side edge of the fastener by an interlocking machine by an interlocking machine at the same time. In an automatic sewing device configured to sew an interlock by a dynamic sewing machine and sew a tubular body with a fastener, a fastener is attached to the upper surface of the needle plate of the electric sewing machine that directly stitches the lining to one side edge of the fastener. A guide groove corresponding to the width of the slider is formed, and a presser foot is formed so as to form a space that allows passage of the slider of the fastener above the fastener corresponding to the worm of the fastener. Therefore, a long fastener provided with is constructed so as to be sewn to the lining.

Then, in order to prevent the feed dog of the electric sewing machine that stitches the lining on one side edge of the fastener from being crushed by the feed dog, the fastener at the position corresponding to the guide groove. It is preferable to configure so as not to feed the portion. In addition, a long fastener provided with the slider and the clasp is continuously formed at a predetermined interval, and the interval is predetermined after the tubular body with the fastener is sewn. It is preferable that the cut portion is cut to a length of.

Further, a long fastener provided with the slider and the clasp has a guide groove corresponding to the width of the slider of the fastener on the upper surface of the needle plate of the electric sewing machine for sewing the outer material to one side edge of the fastener. And forming a presser foot so as to form a space that allows passage of the slider of the fastener above the fastener corresponding to the worm, and a long fastener provided with a slider and a stopper is provided. It is preferably configured to be sutured to the outer material. Also,
It is preferable that the feed dogs of the electric sewing machine that sew the outer material on one side edge of the fastener do not feed to the fastener portion at the position corresponding to the guide groove.

As for the lining sewn to the other side edge of the fastener, a gusset tape is sewn to the other side edge of the fastener by a normal double chain stitch, and then the gusset tape and the lining are sewn with an interlock. A method may be adopted, or a method in which the lining is sewn directly to the other side edge of the fastener with an interlock may be adopted.

[0011]

According to the automatic sewing apparatus of the present invention, when the fastener with slider and the lining are sewn together, the slider is guided by the guide groove on the surface of the needle plate, and in the left-right direction, that is, the length of the fastener. The sewing can be performed with the sewing machine needle in a state in which it is prevented from swinging in the direction perpendicular to the direction (feed direction) or in the lateral direction, and accurate and stable sewing can be performed. Since there is a space above the presser foot that allows the slider to pass through, there is a risk that the slider will come into contact with the presser foot through the lining and thus displace the position of the fastener. It can be avoided.

As a result of forming the guide groove on the surface of the needle plate, the thickness of the needle plate at this portion is reduced, and the feed dog located below is in direct contact with the fastener, the slider, and the clasp of the fastener. In this case, the feed dog is configured to have a shape or an interval that does not contact the worm, the slider, and the stopper plate of the fastener, and is engaged only on the fabric portions on both sides of the fastener. By structuring so that they can be effectively driven together, the outer material can be smoothly sent without crushing the worms of the fastener and without being caught by the slider or the stopper plate.

Similarly, the lining and the fastener are sewn before, but when the slider-attached fastener and the outer material are sewn, the slider is guided by the guide groove on the surface of the needle plate, Similarly, sewing with a sewing machine needle can be performed in a state where it is prevented from swinging in the left-right direction, and accurate and stable sewing can be performed. Since a space is provided above the presser foot to allow the slider to pass through, the slider comes into contact with the presser foot through the folded-back portion for the blindfold, thereby displacing the position of the fastener. It is possible to avoid the fear that it will happen.

As a result of forming the guide groove on the surface of the needle plate, the thickness of the needle plate at this portion is reduced, and the feed dog located below directly contacts the fastener of the fastener, the slider and the clasp. Without or with a light contact, it is mainly configured to engage with only the fabric parts on both sides of the fastener to drive effectively, without crushing the fastener's worms, sliders and clasps. You can send the outer material smoothly without getting caught in.

As described above, although the fastener provided with the slider and the clasp is used, the front material and the fastener, and the lining and the fastener (without the gusset tape) can be sewn together smoothly.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the automatic sewing machine of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a bag-shaped body of a duvet cover (a state in which the cloth is continuous in the longitudinal direction of the cloth and is cut in a predetermined dimension corresponding to the length of the futon in the previous step).
Shows the entire side surface of the automatic sewing device that continuously sew
FIG. 2 shows the plane. Reference numeral 1 denotes a front material, which is placed in a stacked state on the original fabric base 1A located on the lower side in a side view with the front surface of the front material facing upward. Reference numeral 2 denotes a lining, which is placed in a stacked state on the original fabric base 2A provided on the upper side of the original fabric base 1A of the outer material 1 with the back of the lining being the upper side. The front material 1 and the lining material 2 may be prepared in a state of being wound on a roll instead of being prepared as a raw material.

Numeral 3/3 is an edge control for aligning the edges of the front cloth 1 and the back cloth 2 which are respectively provided at the exits of the original fabric bases 1A and 2A of the front cloth 1 and the back cloth 2. In this way, the front material 1 is positioned on the lower side and the lining material 2 is positioned on the upper side so that it can be drawn out in parallel.

Reference numeral 4 denotes a tension roller driven by a servo motor (not shown), which is provided at a position after the outer material 1 has passed through the edge control 3.
By adjusting the speed of the tension roller 4, the tension of the outer material 1 and the fastener 7 to be described later on the outer material 1 and the lining 2 (the fasteners 7 are provided with the clasps 7a at predetermined intervals, and the slider 7b is provided therebetween). After being inserted into the worm 7c in an engaged state and completed as a so-called fastener, it is sewn via a predetermined interval (for cutting) and is continuously configured) It is configured so that the tension of the bag-shaped body can be adjusted.

Reference numeral 5 denotes a guide body forming a loop 1B (FIG. 4) for performing double chain stitching on one side edge of the dress material 1, which itself has a conventionally known structure. 6 is
The fastener supply table is configured to supply the fastener 7 shown in FIGS. 3 to 5 along the side edge of the dress material 1. Reference numeral 8 denotes an electric sewing machine (a pair of four needles, two needles each having a known configuration, so detailed description thereof will be omitted), which is located on the lower side in the moving direction of the fastener supply base 6. Has been done. Reference numeral 9 denotes an electric motor that drives the electric sewing machine.

In the present invention, the electric sewing machine 8 is used by removing one unnecessary pair of needles (located outside the fastener 7) from the four needles, which are a pair of two needles. Therefore, when the fastener 7 is supplied along the one side edge of the outer material 1 by the fastener supply base 6, as shown in FIG. Only one side edge can be sewn by double chain stitch. 5 shows the presser foot 8d in the state of FIG.

As shown in FIG. 6, the needle plate 8a of the electric sewing machine 8 is provided with a guide groove 8b on its upper surface so as to guide the lower surface of the slider 7b of the fastener 7 along the moving direction. Has been formed. This guide groove 8b
Means that the lower surface of the slider 7b engaged with the stopper plate 7a or the worm 7c abuts on the upper surface of the needle plate 8a to cause the fastener 7 to float up together with the outer material 1, thus making the posture unstable and the fastener 7 It prevents sideways shake and prevents accurate stitching. 8f and 8f indicate a pair of sewing needles.

The presser foot 8d of the electric sewing machine 8 is
The fastener 7 is formed so as to secure a space S1 that allows the slider 7b to pass through so that the slider 7b (projecting to the uppermost position) can pass through. Further, as shown in FIG. 7, the feed dog 8e (which is oscillated by the crank mechanism) of the electric sewing machine 8 is installed so as to fit in the guide groove 8b, but the moving fastener 7 In order to prevent engagement with the lower surfaces of the worm 7c, the slider 7b, and the stopper plate 7a, the distance is set so as not to act on them. However, assuming that the transfer force of the outer material 1 and the fastener 7 may be slightly reduced, if an electric sewing machine having a conventional structure is used, it is located at the center of the plurality of feed dogs (usually a set of five). The feed dog may be removed, and a part of the teeth on both sides of the feed dog may be cut off for implementation. Reference numerals 8g and 8g denote elongated holes through which the feed dog 8e formed on the needle plate 8a passes, and are also formed as shown in FIG.

[0023] 10 indicates that the lining 2 is placed on the outer material 1,
3 shows a guide roller that is piled up with its both side edges substantially aligned. Reference numeral 11 denotes a plate-shaped guide body having a curved surface at its tip, and although not shown in detail, one end of the loop 1B is provided so that the loop 1B does not interfere with stitching the lining 2 to the fastener 7. Is fixed to the outside of the device frame,
It is configured to extend toward the center and relatively invade between the loop 1B and the upper surface of the fastener 7 when the outer material 1 is transferred, so that the loop 1B moves upward (stands up) from the suture position. ing.

As shown in FIGS. 1, 2, 8 and 9.
An electric sewing machine 12B that sewes the outer fabric 1 and the other side edge of the lining 2 by interlock stitching on the lower side in the moving direction of the guide body 11, and an interlock stitch of the lining 2 on the other side edge of the fastener 7. The electric sewing machine 12A that is sewn by the sewing machine is arranged. 13 is an electric sewing machine 12
Shows an electric motor that drives the.

This electric sewing machine 12A is particularly suitable for the presser foot 1.
6 and the needle plate 17 are different from the conventional structure. Presser foot 16
Is the slider 7b of the fastener 7 (most bulky)
In order to form a space S2 for allowing the passage of the above, a block 16b is attached to the lower surface on the end side where the end aligning knife 18 is located. This is about 5-10 mm. However, the blocks 16b may be provided on the left and right so as to form the space S2 in the recess. A guide groove 17a for guiding the slider 7b of the fastener 7 is provided on the upper surface of the needle plate 17.
Are formed. The guide groove 17a is about 2 to 5 mm. In the figure, 12a is a sewing needle.

Therefore, as shown in FIGS. 8 and 9, the stitching of the fastener 7 and the lining 2 by the electric sewing machine 12A is performed in a state where the loop 1B of the outer material 1 is lifted and the lining 2 is overlaid thereon. The other side edge of the fastener 7 and the side edge of the lining are sewn together by interlock stitching. As a result, the outer fabric 1 and the lining 2 are sewn into a continuous bag-like body via the fastener 7.

Reference numeral 14 denotes a cutting mechanism, which is shown in FIGS.
As shown in FIG. 3, a sensor (not shown) is provided, and the bag-shaped body (cylindrical body) after sewing is cut at a predetermined interval of the fastener 7 (a portion where the worm 7c is not laid and can be cut). It is cut so as to obtain a tubular body having a required length (futon length).

[0028]

According to the automatic sewing machine of the present invention, when the bag-like body (cylindrical body) used for the duvet cover or the like is automatically sewn,
A so-called completed fastener equipped with a clasp and slider can now be sewn to the lining accurately and without any trouble, using a simple sewing process without the use of a gusset tape, and compared to conventional bags. After the body is sewn on, the process of attaching the stopper plate and slider again can be omitted,
It has come to be possible to significantly reduce costs. Further, since the outer material and the fastener can be smoothly sewn in the same manner, there is an advantage that a duvet cover or the like without a gusset tape can be provided at a low price as a whole.

[Brief description of drawings]

FIG. 1 is a schematic side view of an automatic sewing device of the present invention.

FIG. 2 is a schematic plan view of an automatic sewing device of the present invention.

FIG. 3 is a front view of the duvet cover in the intermediate step of sewing by the automatic sewing device of the present invention.

FIG. 4 is a perspective view of an essential part showing a sewing process of the essential part of the present invention.

FIG. 5 is a perspective view of a main part of the electric sewing machine of the present invention.

FIG. 6 is a vertical sectional view of a main part of the electric sewing machine of the present invention.

FIG. 7 is a perspective view of a main part of the electric sewing machine of the present invention.

FIG. 8 is a vertical cross-sectional view of a main part showing one sewing process (interlock) of the present invention.

FIG. 9 is a perspective view of a main part showing one sewing process (interlock) of the present invention.

[Explanation of symbols]

 1 Outer fabric 2 Lining 7 Fastener 7a Stopper 7b Slider 7c Musashi 8 Electric sewing machine 8a Needle plate 8b Guide groove 8d Presser foot S1 space

Claims (5)

[Claims] 1. A long edge material is located on the lower side, a long lining material is located on the upper side, the front material of the outer material faces upward, and the lining material of the upper surface faces upward, and the side edges of the outer material are taken out in parallel to each other to form one side edge of the outer material. Is folded back toward its back side by a predetermined width substantially corresponding to the fastener width, and one side edge of the long fastener is sequentially sewn near the inner end of the folded piece by an electric sewing machine, and the folded piece has a cross section. Sew so as to form a loop visually, and then raise the loop from the sewn-in portion of the fastener and fold it back to the center side in the width direction of the dress material.In this state, one side edge of the lining is Sequentially sew on the side edges directly with an electric sewing machine with an interlock, and at the same time, sew the other side edges of the outer material and the lining with another electric sewing machine with an interlock to sew a tubular body with a fastener. In the automatic sewing device configured as described above, a guide groove corresponding to the width of the slider of the fastener is formed on the upper surface of the needle plate of the electric sewing machine that directly stitches the lining to one side edge of the fastener, and the fastener An automatic sewing structure in which a presser foot is formed so as to form a space that allows passage of the slider of the fastener above the mussel and a long fastener having a slider and a stopper is sewn to the lining. apparatus. 2. The automatic sewing machine according to claim 1, wherein the feed dog of the electric sewing machine for directly sewing the lining to one side edge of the fastener is configured so as not to feed to a fastener portion at a position corresponding to the guide groove. apparatus. 3. A long fastener provided with the slider and a clasp is continuously formed at a predetermined interval, and the interval is the tubular shape after the tubular body with the fastener is sewn. The automatic sewing device according to claim 1 or 2, wherein the automatic sewing device is provided at a cutting portion for cutting the body into a predetermined length. 4. A long fastener provided with the slider and a clasp has a guide groove corresponding to the width of the slider of the fastener on the upper surface of the needle plate of the electric sewing machine for sewing the outer material to one side edge of the fastener. And forming a presser foot so as to form a space allowing passage of the slider of the fastener above the fastener corresponding to the worm.
The automatic sewing device according to claim 1, wherein a long fastener provided with a slider and a clasp is configured to be sewn to the outer material. 5. The automatic sewing device according to claim 4, wherein the feed dog of the electric sewing machine that stitches the outer material to one side edge of the fastener does not feed to the fastener portion at a position corresponding to the guide groove. .