JPH0544067U - Bead forming device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is capable of reliably detecting the edge of the flap cloth even when the bag cloth is placed on the flap cloth, and the body cloth, the ball cloth, and the flap are detected. An object is to provide a bead forming device capable of automating simultaneous sewing of cloth and bag cloth. [Structure] This invention is a cloth cloth which holds a body cloth W1 placed on a cloth placing table T by a pair of body cloth pressers 1 and 2 and lowers the cross section when the cloth cloth W1 is lowered between the body cloth pressers. The central portion of the pad cloth W2 is pressed along the presser foot 3, and both side portions of the pad cloth are bent by the pair of folding plates 1a and 2a, and the flap cloth W3 and the bag cloth W4 are placed on at least one of the folding plates. After fixing, the cloth presser is moved toward the needle drop position to move each cloth together with the cloth, and between the cloth guide 11 and the ball cloth presser 3 provided near the needle drop position. It is designed such that it is introduced and pinched by the upper and lower parts, and that the detecting means 10 detects the ascending / descending position of the cloth guide.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, the edge cloth is sewn by sewing a ball cloth at the pocket opening portion of the body cloth, and the flap cloth covering the pocket opening portion can be sewn at the same time during the sewing operation. The present invention relates to a bead forming device.

[0002]

[Prior Art]

 At present, a device shown in FIG. 5 is known as a device for performing trimming sewing called a bead on the opening of a pocket or the like. In the figure, a pair of body material pressers 1 and 2 facing each other with a predetermined interval provided on the cloth placing table T. It can be moved up and down on the table 1. In addition, folding plates 1a and 2a are provided inwardly of the body pressers 1 and 2 so as to be retractable.

A well-known two-needle sewing machine M that forms two stitches at the same time is located on the cloth placing table T. From the needle drop position of the sewing machine M, the cloth conveying direction (Y direction). In front of this, there is provided a cloth presser foot 3 which is moved up and down by a driving means (not shown). This ball cloth presser 3 has an inverted T-shaped cross section due to a rising part 3a connected to a driving means (not shown) and a flat plate part 3b provided at the lower end thereof, and when descending, the cloth setting position (one point in FIG. 5). It is adapted to descend between the pair of body material pressers 1 and 2 which have been moved to the position (shown by the chain line).

Therefore, after pressing the body cloth W1 by the body cloth pressers 1 and 2, the cloth W2 is placed on the body cloth pressers 1 and 2, and the cloth cloth presser 3 is lowered to the center of the cloth cloth W. The portion is pushed between the body material pressers 1 and 2 by the flat plate portion 3b and is in a state of overlapping with the body material W1. From this state, if the folding plates 1a and 2a are protruded inward, the body material is W1 is bent along the shape of the cushion cloth 3 and stands up (see FIG. 6).

Next, a flap cloth W3 for covering the opening of the pocket is set on the ball cloth W2. In this setting operation, after the flap cloth W3 is placed on one folding plate 1a, the cloth fixing member 4 provided on the one body material presser 1 so as to be able to move up and down is lowered by a cylinder or the like (not shown), This can be performed by sandwiching and fixing the flap cloth between 1a and the cloth fixing member 4, and the cloth setting operation is completed.

After that, by moving the body cloth pressers 1 and 2 in the arrow Y direction, the body cloth W1, the ball cloth W2 and the flap cloth W3 move in the same direction, and the flap cloth is moved. When the tip of W3 reaches the needle drop position, the sewing needles N1 and N2 start to move up and down at the same time, and the body material W1, the bead W2 and the flap cloth W3 are sewn by one sewing needle N1 and the other The body cloth W1 and the ball cloth W2 are sewn together by the sewing needle N2. The sewing operation ends when the end of the flap cloth W3 is reached, but the body cloth and the cloth W2 that have passed the needle drop position during this time are separated into two pieces by the center mesh 5 protruding from the cloth mounting table T. The central portion of the stitch line is incised, and both ends of the incised portion are incised in a V shape by the corner knife 6, whereby the formation of the bead is completed.

[0007] It is necessary to sew a bag cloth constituting the bag portion of the pocket to the body cloth having the bead thus formed. In this sewing work, as shown in FIG. 7, the flap cloth W3 is overlapped on the pocket cloth W4, and a stitch is formed along substantially the same position as the seam line S formed on the flap cloth W4 when forming the bead. By Therefore, this work is usually performed by a process other than the bead forming process.

[0008] Therefore, a lot of personnel, equipment, and space are required for the work, and there is a problem that the appearance of the sewn portion is impaired by forming double seams in the same place in terms of quality. did. Therefore, at present, in the bead forming step, the bag cloth W4 is further overlapped on the flap cloth W3, these are fixed by the cloth fixing member 4, and the bag cloth W4 is also sewn at the same time in the bead sewing forming step. Has also been done.

[0009]

[Problems to be solved by the device]

 However, in the conventional device, since the edge portion of the flap cloth is detected by using the light sensor that irradiates the folding plate with light and receives the reflected light, the flap cloth W3 is detected as described above. When the bag cloth W4 is superposed on the bag cloth W4, the flap cloth W2 is completely covered with the bag cloth W4 as shown in FIG. 7, and the end portion of the flap cloth W2 cannot be detected, so that the sewing operation is not performed. There was a problem that it could not be started automatically.

Therefore, when the bag cloth W4 is simultaneously sewn, the bag cloth W4 is turned over each time by using a manual mechanism or a special mechanism, and the operator confirms the end position of the flap cloth. Sewing work was done, but this puts a lot of strain on the operator, and the quality of the sewn product is likely to vary, so the significance of installing this type of equipment such as automation and labor saving is lost.

Since the present invention has been made in view of the above-mentioned problems, it is possible to reliably detect the edge of the flap cloth even when the bag cloth is placed on the flap cloth by overlapping. An object of the present invention is to provide a bead forming device capable of automatically performing simultaneous sewing of cloth, bead cloth, flap cloth and bag cloth.

[0012]

[Means for Solving the Problems]

 This invention holds a cloth placed on a cloth placing table by a pair of cloth pressers, and lowers the cloth between the cloth pressers. When the cross section is at an inverted T, the center of the cloth is along the press cloth press. Press the folds and fold both sides of the ball cloth with a pair of folding plates, place and fix the flap cloth and bag cloth on at least one folding plate, and then direct the body material presser to the needle drop position. By moving it, each cloth is moved together with the body cloth, while it is introduced and pinched between the cloth guide and the ball presser provided near the needle drop position, and the vertical position of the cloth guide is changed. The detection means is used for detection.

[0013]

[Action]

 In this invention, when each cloth is moved toward the needle drop position together with the body cloth, the ball cloth, the bag cloth and the flap cloth are sequentially inserted between the cloth guide and the ball cloth retainer, and the cloth cloth is inserted. The cloth guide is sequentially pushed upward according to the number of cloths to be cut. Therefore, the position of the cloth guide will change depending on whether the ball cloth and the bag cloth are inserted or the flap cloth is inserted in addition to these cloths. The output value of changes. Therefore, it becomes possible to detect whether or not the end position of the flap cloth has reached the vicinity of the needle drop position by the output value of this detection means, and if the detection signal is used for starting and ending the sewing operation, The operation can be performed automatically.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. It should be noted that the same or corresponding parts as those of the above-described conventional technique are denoted by the same reference numerals, and detailed description thereof will be omitted. The bead forming device in this embodiment includes a sewing machine having sewing needles N1 and N2, body material pressers 1 and 2, a cloth presser foot 3, a cloth fixing member 4 and the like as in the conventional case, and a cloth set. The setting operation of each cloth at the position is performed in the same manner as in the past.

On the other hand, a fulcrum shaft 10 is rotatably supported on the upper part of the pad cloth retainer 3 in this embodiment, and the fulcrum shaft 10 prevents the rising portion of the cloth cloth W1 from falling. The cloth guide 11 is fixed. Further, a leaf spring (spring body) 12 as an elastic member fixed to the rising portion of the ball cloth presser 3 is pressed against the cloth guide 11, and is formed at the lower end portion by the urging force of the leaf spring 12. The thin plate-shaped guide portion 11a is always in pressure contact with the upper surface of the cloth presser foot.

The lower surface of the guide portion 11a is inclined upward from the front to the rear in the cloth conveying direction, and the tip end thereof rises with the needle drop groove 3b1 formed at the tip of the flat plate portion 3b of the pad cloth retainer 3. It is designed to descend between itself and the portion 3a. Although not shown here, a cloth guide having the same structure as the cloth guide 11 is provided symmetrically with the cloth guide 11 with the rising portion 3b of the pad cloth holder 3 interposed therebetween.

Reference numeral 13 is a potentiometer as a detecting means for detecting the rotation angle of the fulcrum shaft 10. The potentiometer 13 has its electric resistance changed by the rotation of the fulcrum shaft 10 and its terminal voltage (output signal value) changed. Here, the output signal value from the potentiometer increases as the fulcrum shaft rotates in the direction a in the figure, and conversely decreases by rotating in the direction b. Further, this output signal is inputted to a control means (not shown) such as a CPU through a predetermined input device, and the control means controls the start and end of the sewing operation of the sewing machine main body based on this output signal. It has become.

Next, the operation will be described based on the above configuration. In the sewing operation, first, the body cloth W1, the ball cloth W2, the flap cloth W3, and the bag cloth W3 are sequentially set at the cloth setting position as in the conventional case. As a result, the flap cloth W3 is covered with the bag cloth W4 as shown in FIG. Further, when each cloth is at the cloth set position (position shown in FIG. 1), the guide portion 11a of the cloth guide 11 is in pressure contact with the flat plate portion 3b of the pad cloth presser 3, and the output signal from the potentiometer 13 is predetermined. Takes the initial value of.

Here, when the body cloth pressers 1 and 2 are moved forward (Y direction) and the cloths W2, W3 and W4 together with the body cloth W1 reach the vicinity of the needle drop position P, first of all, the cloth cloth presser 3 is pressed. The cloth W2 located on the upper surface enters between the cloth guide 11 and the cloth presser foot 3, and the cloth guide 11 is pushed up by the cloth thickness (see FIG. 4 (a)), and the fulcrum shaft 10 moves in the a direction. Rotate a predetermined angle to. As a result, the output signal value of the potentiometer 13 changes to a value larger than the initial value (first output value).

After that, when the body material pressers 1 and 2 are further advanced, the front end portion of the bag cloth W4 covering the flap cloth W3 enters between the cloth guide 11 and the pad cloth presser 3 and It is pushed upward by the thickness of the bag cloth W4 (see FIG. 4 (b)). As a result, the fulcrum shaft 10 further rotates in the direction a, and the output signal value from the potentiometer changes to a value larger than the first output value (second output value) with the rotation.

When the cloth further advances and the front end portion of the bag cloth W4 between the cloth guide 11 and the pad cloth presser 3 reaches the vicinity of the needle drop position, the cloth guide 11 and the pad cloth presser 3 are separated from each other. Three pieces of cloth, that is, a ball cloth W2, a flap cloth W3, and a bag cloth W4 are inserted between them, and the cloth guide 11 is in the most pushed up state at this point (see FIG. 4 (c)). Therefore, the fulcrum shaft 10 also takes the maximum rotation angle in the a direction, and the output signal value from the potentiometer also changes from the second output value to the third output value larger than this.

When the second output signal value changes to the third output signal value, the control means immediately starts the sewing operation. As a result, stitches are formed starting from the end portion of the flap cloth W3.

After that, when the rear end of the flap cloth W3 passes through the cloth guide 11, the cloth guide 11 presses the two cloths of the flap cloth W3 and the bead cloth W2, and the flap from the previous highest position. The cloth W3 is lowered by the cloth pressure (see FIG. 4D). Therefore, the fulcrum shaft 10 rotates in the direction of the arrow b, and the output value of the potentiometer 13 decreases from the third output value to the second output value. In response to this change, the CPU immediately stops the sewing operation, and the end portion of the stitch coincides with the rear end portion of the flap cloth W3. Although not specifically shown here, the body cloth W1 and the ball cloth W2 are incised by a center knife and a corner knife in a conventional manner.

As described above, in this embodiment, the flap cloth W3 is covered with the bag cloth W4 because the thickness of the cloth inserted between the ball cloth presser 3 and the cloth guide 11 is detected. In this case, it is possible to reliably detect the positions of the front end portion and the rear end portion of the flap cloth W3, and by using the detection result, it is possible to automatically form a stitch in an appropriate range. ..

Here, the case where the sewing operation is performed with the bag cloth overlaid on the flap cloth W3 has been described as an example, but only the body cloth W1, the ball cloth W2 and the flap cloth W3 are sewn. This embodiment can be applied to the case where the bag cloth is sewn in a separate process. In other words, in this case, the output value when the cloth W2 and the bag W2 are inserted below the cloth guide 11 is used as the sewing start signal, and the output value is the output value when one cloth is inserted. It suffices to end the sewing operation at the time when it changes to.

Further, in the above embodiment, since it is assumed that the flap cloth W3 and the bag cloth W4 are placed on the one folding plate 1a, the potentiometer 11 is provided only on one cloth guide 10, but the other cloth guide 10 is provided. The guide may also be provided with the potentiometer 13. Further, the detecting means according to the present invention is not limited to one whose electric resistance changes, and other detecting means such as a magnetic detecting means or an optical detecting means can be used.

Further, in the above-described embodiment, the so-called double bead formation in which the bead is formed at both opening edges of the pocket opening has been described as an example, but in the so-called double bead formation in which the bead is formed only at one opening edge. The present invention is also applicable, and the present invention is not particularly limited to the above embodiment.

[0028]

[Effect of the device]

 As described above, the bead forming device according to the present invention introduces and holds the cloth reaching the vicinity of the needle drop position between the cloth presser and the cloth guide, and detects the ascending / descending position of the cloth guide. By doing so, the cloth thickness at the needle drop position is detected.Therefore, even if the flap cloth is covered with a bag cloth, it is possible to determine whether the front end and the rear end of the flap cloth have reached the needle drop position. It can be detected accurately. Therefore, stitches can be formed reliably and automatically without losing the sewing range from the front end to the rear end of the flap cloth, which reduces the burden on the operator and improves the productivity. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cloth set state in an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the cloth is moved toward the needle drop position from the state shown in FIG. 1 in the embodiment.

FIG. 3 is an enlarged side view of an essential part of what is shown in FIG.

FIG. 4 is a side view showing an operating state of the one shown in FIG. 3, (a) showing a state in which a pad is introduced between a pad presser and a cloth guide, and (b) showing a pad press. Shows a state where a ball cloth is introduced between the cloth cloth guide and the cloth guide, and (c) shows a state where a cloth cloth and a bag cloth are introduced between the cloth presser foot and the cloth guide,
(D) shows a state in which a ball cloth, a bag cloth, and a flap cloth are introduced between the ball cloth presser and the cloth guide.

FIG. 5 is a perspective view showing a schematic configuration of a conventional bead forming device.

FIG. 6 is a perspective view showing a cloth set state of the one shown in FIG.

FIG. 7 is a perspective view showing a state in which a bag cloth is set on the cloth after the bead forming step is completed.

[Explanation of symbols]

 T cloth mounting table 1, body cloth presser 1a, 2a folding plate 3 ball cloth presser 4 cloth fixing member 10 fulcrum shaft 11 cloth guide 12 leaf spring (elastic member) 13 potentiometer W1 body cloth W2 jade cloth W3 flap cloth W4 bag cloth

Claims (2)

[Scope of utility model registration request] 1. A pair of opposing members that press and hold a body material placed on a cloth placing table at a predetermined interval and move the body material from a cloth setting position to a needle drop position. Of the body cloth presser and the cloth placing table are provided so as to be able to move up and down, and when descending, they are lowered between the pair of body cloth pressers to press the central portion of the woven cloth placed on the both body cloth pressers. A cross section of a T-shaped cross section and a pair of fold-outs which are provided so as to be able to appear in and retract from each of the above-mentioned fabric pressers and bend both side portions of the cross section inward along both sides of the above-mentioned cross section when projecting. A folding plate, a cloth holder for fixing a flap cloth and a bag cloth on the folding plate, and a foldable plate supported by the padlock so as to be able to move up and down, and always near a needle drop position of the padlock by a predetermined elastic member. And a fabric guide held by the And each cloth is moved toward the needle drop position so that the ball cloth, the flap cloth, and the bag cloth are introduced and pinched between the cloth guide and the cloth presser, and the cloth guide is moved up and down. A bead forming device comprising a detection means for detecting 2. A dough guide is fixed at its one end to a fulcrum shaft rotatably provided on a cloth presser, and is always held at a lowermost position by a spring body, while the detecting means is rotated at a rotational position of the fulcrum shaft. A bead forming device comprising a potentiometer for detecting the.