CN1904178B - Panel strip seamer - Google Patents

Abstract

A panel sewing machine that can smoothly fold panel fabric regardless of changes in fabric thickness. The large presser foot feeding mechanism (20) of the molding sewing machine (10) has a folding device (60) for folding the molding cloth (N) on the upper side of the bottom plate (31) of the binding device (30). The entry device has: a pair of fold-in plates (61, 61) arranged on the left and right sides of the vertical plate portion (32) of the binding device and arranged above the bottom plate portion; The part is disconnected and moved to fold in the fold-in cylinder (62) of the strip cloth along the top of the bottom plate part; through the fold-in cylinder, each fold-in plate is supported by a pair of support members whose front end can swing up and down ( 63); and a coil spring (64) that presses the front end of each fold-in plate downward. That is, by configuring the front end portion of the tuck-in plate to retract upward and be urged downward, the panel cloth can be smoothly folded in regardless of the thickness of the cloth from thin to thick.

Description

Panel Sewing Machine

technical field

The present invention relates to a molding sewing machine for molding molding.

Background technique

A panel sewing machine is a sewing machine for forming a pocket by, for example, sewing panel fabric on a body material of clothes, and forming predetermined incisions on the body material and the panel fabric (for example, refer to Patent Document 1).

That is, in the sewing process of this panel sewing machine, on the upper surface of the needle plate, the panel fabric is superimposed on the body fabric, and the panel composed of the bottom plate portion and the vertical plate portion vertically erected on it is pressed down from above. edger. Then, respectively fold the two ends of the panel cloth from the top of the bottom plate of the binding device along the respective planes of the vertical plate, and keep the folded state, and then move in one direction along the above-mentioned folding line by the cloth feeding mechanism. Convey the body fabric and panel fabric in a smooth manner, while using double needles to form two stitches on both sides of the vertical plate of the binding device, and sew the panel fabric on the body fabric in a folded state. Then, the center cutter is moved up and down synchronously with the up and down movement of the machine needle to form a linear center cut between the above-mentioned seam lines, and then the vertical movement of the corner cutter arranged in a V shape forms a straight center cut. The pockets are formed by sewing the substantially V-shaped corner slits of the bifurcations that are continuous at both ends of the central slit.

[Patent Document 1] Japanese Patent Publication No. 1-38517

However, in the device for tucking in the panel cloth provided in the conventional panel sewing machine described in the above-mentioned Patent Document 1, as shown in FIG. The folding plate 202 in which the panel cloth is folded faces the horizontal direction and moves horizontally, so the installation height and the operating direction are fixed, and the problem caused by this is that the thickness of the panel cloth exceeds the set thickness. In this case, as shown in FIG. 10 , due to the thickness and rigidity of the fabric, the folding plate 202 may stop midway and the folding operation may be interrupted.

In addition, in order to solve the above-mentioned problems, the following method can be adopted, that is, the rubber 203 attached to the underside of the large presser foot device 200 with the built-in fold-in plate 202 is replaced, and the rubber 203 is replaced with a thick panel cloth (hereinafter referred to as Thick cloth) corresponding to the thickness of the rubber, when the tuck-in plate 202 moves, the lower surface of the tuck-in plate 202 moves along the upper surface of the bottom plate portion 201a at a position higher than the upper surface of the folded thick cloth, thereby It is used to tuck in thick panel cloth, but in actual panel sewing, the thickness of the panel fabric changes frequently according to different sewing batches, so it is used to fold in thick When the thin panel fabric is folded in the rubber 203 of the panel fabric, as shown in FIG. The problem of unstable quantity.

Therefore, in order to realize the correspondence with the change of the cloth thickness of the panel cloth and the stabilization of the folding amount, it is necessary to select and replace the rubber 203 with an appropriate thickness corresponding to the cloth thickness, but this brings about the increase of the cost and the loss due to the replacement work. The problem of low working efficiency of the device caused.

Contents of the invention

Therefore, it is an object of the present invention to provide a panel sewing machine capable of smoothly folding panel fabric regardless of changes in fabric thickness.

In order to solve the above-mentioned problems, the invention described in the first technical solution is a molding sewing machine, which includes: a binding device, which has a bottom plate portion and a vertical plate portion vertically installed on the bottom plate portion, and is to be placed on the garment. The strip cloth on the body fabric is guided to the needle drop position of the machine needle along the bottom plate part and the vertical plate part; and the folding device has a pair of folding plates, and the pair of folding plates are separated by the The two sides of the vertical plate portion of the edger are arranged above the bottom plate portion, and each fold-in plate is driven by the drive mechanism to move close to the vertical plate portion, and the front end of each fold-in plate moves toward the vertical plate portion. The upper side of the bottom plate folds the two ends of the panel cloth extending from the left and right ends of the bottom plate so as to fold in the panel cloth, and the folding device is characterized in that the folding device has: A pair of support members independently supporting the respective tuck-in panels so that the front end of the tuck-in panel can move up and down; and a biasing member for pressing the front end of each tuck-in panel downward.

The invention according to the second claim is characterized in that, in the panel sewing machine according to the first claim, the tuck-in device has a section for maintaining the height of the tuck-in plate from the upper surface of the body fabric so that When the pair of tuck-in plates are driven by the driving mechanism to move closer to fold in the panel cloth, the front ends of each tuck-in plates are located on the outside of the left and right ends of the bottom plate. The panel cloth is folded to a height equal to or greater than a total thickness when sandwiching the bottom plate portion from above and below.

The invention according to claim 3 is characterized in that, in the panel sewing machine according to claim 1 or claim 2, the tuck-in device is configured such that the pair of tuck-in plates When the panel cloth is folded in by being driven and approached, the front end portion moves obliquely downward toward the upper surface of the bottom plate portion.

The invention according to claim 4 is characterized in that, in the panel sewing machine according to any one of claims 1 to 3, the supporting member pivotally supports each of the tuck-in plates so that all The front end of each fold-in plate can move up and down.

According to the invention described in claim 1, each tuck-in plate arranged on both sides of the vertical plate is supported by the supporting member in a state where the front end of each tuck-in plate can move up and down, and each tuck-in plate The front end portion of the plate is normally biased downward by the biasing member. Thus, in the case of folding in the thick panel cloth, the front end of the tuck-in plate advances while sliding on the top surface of the panel cloth according to the thickness of the cloth, and the folding operation is performed. In the case of cloth, the front end of the tuck-in plate urged downward contacts and slides on the upper surface of the panel cloth to perform the tuck-in operation. Therefore, a smooth tuck-in operation can be realized without being restricted by the cloth thickness of the panel cloth to be tucked in. In addition, by applying force to the lower side of the front end of the tuck-in plate, the panel cloth can be folded in while stretching out along the upper surface of the binder, so that no slack occurs in the folded-in panel cloth. Stabilization of the fold-in amount can be realized. In addition, there is no need to replace parts every time the cloth thickness is changed, so that it is possible to reduce the cost and improve the working efficiency of the panel sewing machine.

According to the invention described in the second claim, the same effect as that of the invention described in the first claim can be obtained, and in particular, by providing a section in the tuck-in device, the front end of the tuck-in plate is maintained at a ratio of The panel cloth is folded to an upper position where the total thickness of the bottom plate part is sandwiched from top to bottom, and in this state, the front end of the tuck-in panel is guided to a position overlapping with the upper edge of the bottom plate part. near. Therefore, when the front end of the tuck-in panel comes into contact with the panel fabric during the operation of the tuck-in panel, the movement in the traveling direction is not stopped by the panel fabric, and a smooth movement can be realized even for a thick panel fabric. Fold into action. In addition, although the height maintained by the segment is set to the total thickness when the panel is folded so as to sandwich the bottom plate from top to bottom, it is desirable to assume that the panel in this case is It is the thickest panel cloth in the range generally used in sewing.

According to the invention described in the third claim, the same effect as that of the invention described in the first claim or the invention described in the second claim can be obtained. In addition, especially, the front end portion of the tuck-in plate faces from the upper surface of the bottom plate portion. Descend obliquely upward, and contact the top of the folded panel cloth from obliquely upward. Therefore, the upper surface of the folded panel cloth is not in contact with the entire lower surface of the tuck-in panel, but only in linear contact with the front end thereof. Thereby, the upper surface of the folded panel cloth can be flattened and guided to the side of the vertical plate, so that the panel cloth can be folded along the upper surface of the binder without slack. As a result, stabilization of the amount of folding can be effectively achieved. Furthermore, since the tuck-in board moves obliquely downward, it can accommodate the cloth thickness of the range corresponding to the height change by the movement of a front-end|tip part.

According to the invention described in the fourth technical claim, the same effect as any one of the inventions described in the first technical claim to the third technical claim can be obtained. Since the base end side of the tuck-in plate is pivoted, the front end portion of the tuck-in plate can be moved up and down with a simple structure.

Description of drawings

Fig. 1 is a perspective view showing an overall schematic structure of a molding sewing machine to which the present invention is applied;

Fig. 2 is a front view showing the state before folding in from the D-D vector direction in Fig. 1;

Figure 3 is an enlarged view of the main part of Figure 2;

Fig. 4 is a front view showing the folding operation of thin cloth in the molding sewing machine according to the present embodiment;

Fig. 5 is an enlarged view of the main part of Fig. 4;

Fig. 6 is a front view showing the folding operation of the panel sewing machine according to the embodiment;

Figure 7 is an enlarged view of the main part of Figure 6;

FIG. 8 is an explanatory view showing the shape of the front end of a tuck-in plate usable as the present embodiment;

Fig. 9 is an explanatory view showing a folding operation of a conventional panel sewing machine;

Fig. 10 is an explanatory view showing a folding operation of a conventional panel sewing machine;

Fig. 11 is an explanatory view showing a tuck-in operation of a conventional panel sewing machine.

In the picture:

10-Inlay sewing machine; 11-Sewing machine table; 20-Big presser foot feeding mechanism (cloth feeding mechanism); 21-Big presser foot; 22-Support body; 23-Big presser foot arm; 24-Rubber plate; 25- Baffle seat; 30-binder; 31-bottom plate; 32-vertical plate; 41-needle; 42-needle bar; 51-center cutter; 51b-cutting edge; 60-folding device; 61- Folding board; 62-folding cylinder (drive mechanism); 63-supporting part; 63a-rotation fulcrum; 64-coil spring (force application part); 91-corner cutter; N-inlay cloth; M-clothing fabric ; F-feeding direction; P-movable part.

Detailed ways

(Overall structure of the embodiment of the invention)

Next, a panel sewing machine 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 7 .

FIG. 1 is a perspective view showing an overall schematic configuration of a panel sewing machine 10 . In addition, in this embodiment, each direction is set on the basis of the XYZ axes shown in each figure, the Z-axis direction is consistent with the up-and-down movement direction of the center cutter 51 described later, and the working plane for sewing operations is consistent with the Z axis direction. The axial direction is vertical, and the direction parallel to the working plane and carrying out cloth feeding is defined as the X-axis direction, and the direction parallel to the working plane and perpendicular to the X-axis direction is defined as the Y-axis direction.

The panel sewing machine 10 sews panel fabric N (refer to FIG. 3 ) with respect to body fabric M, and simultaneously forms: a linear center cut along the feeding direction of these fabrics, and two ends of the center cut. A sewing machine that forms a roughly V-shaped corner cut.

Furthermore, this panel sewing machine 10 includes: a sewing machine stand 11 serving as a sewing workbench; a sewing machine frame 12 arranged on the sewing machine stand 11; The presser foot feed mechanism 20; the binding device 30 that contacts the panel fabric N from above on the upper side of the body material M; the vicinity of the downstream side of the binding direction F of the binding device 30, that is, the vertical plate portion of the binding device 30 (will be described later) The needle up and down movement mechanism that the both sides of 32 carry out drop needle; 51 moves up and down in the middle of each machine needle 41 on the downstream side of the cloth feeding direction F of each machine needle 41, and forms a center cut on each cloth M, N; The positions of both ends of the center cutout form substantially V-shaped corner cutouts.

Each part will be described below.

(sewing machine table and sewing machine frame)

The sewing machine table 11 is arranged so that its upper surface is parallel to the X-Y plane, and is used in a horizontal state. The upper surface of the sewing machine table 11 is formed in a long rectangular shape along the cloth feeding direction F, that is, the X-axis direction. A large presser foot feeding mechanism 20 and a hemming device 30 which will be described later are disposed on the sewing machine base 11 , and a corner cutter mechanism is disposed on the lower side of the sewing machine base 11 .

In addition, a needle plate 13 is provided on the sewing machine table 11, and two needles 41, 41 provided at the front end of a handpiece head 12c described later perform needle drop respectively in two needle holes formed on the needle plate 13. On the lower side of each needle hole, a horizontal rotary hook not shown is respectively provided, and the sewing thread inserted through each machine needle 41, 41 is caught respectively by the corresponding horizontal rotary hook on the lower side of the needle plate 13, and is connected with the horizontal rotary hook from The bobbin threads pulled out by each horizontal hook are hooked, and sewing is carried out by this. In addition, on the downstream side in the cloth feeding direction F substantially in the middle of the two needle holes of the needle plate 13, a slit for inserting the center knife 51 is formed, and a non-contact hole for cutting the cloth by operating together with the center knife 51 is arranged. The fixed cutter shown in the illustration.

The sewing machine frame 12 is composed of: a base portion 12a disposed close to the middle position in the longitudinal direction of the sewing machine table 11; a vertical body portion 12b erected from the base portion 12a; The machine part 12c provided along the Y-axis direction is constituted, and main components of a needle vertical movement mechanism and a movable knife mechanism described later are housed in the machine part 12c. In addition, the double needles 41, 41 and the center cutter 51 are supported vertically at the lower end portion on the front end side of the nose portion 12c.

(needle up and down movement mechanism)

The needle up and down movement mechanism has: two needles 41, 41 constituting double needles; and two needle bars 42, 42 holding the respective needles 41, 41 at their lower ends. In addition, although not shown in the present embodiment, the needle up and down movement mechanism includes: a support frame that supports each needle bar 42, 42 and enables it to slide along its longitudinal direction; Rod arch; the sewing machine main shaft motor that becomes the driving source for the up and down motion of the machine needle; the sewing machine main shaft that is driven to rotate based on the sewing machine main shaft motor; the rotary hammer that is fixedly connected to one end of the sewing machine main shaft for rotational movement; The center of rotation of the hammer is eccentric, and the other end is connected to the crank shaft of the needle bar abutment;

And, when the sewing machine main shaft is given a full-rotational rotational driving force by the driving of the sewing machine main shaft motor, a force along the substantially Z-axis direction is transmitted to each needle bar 42, 42 to move it through the rotary hammer and the crank shaft. Drive force component, thereby make each machine needle 41,41 carry out reciprocating up and down movement. In addition, it is possible to form a structure in which the needles 41, 41 positioned at the lower ends of the respective needle bars 42, 42 can move parallel to the sewing direction if they are given a rotational force within a predetermined angle range from the rotational axis, and move in parallel to the sewing direction. The short-stroke sewing is performed in the direction opposite to the feeding direction F, which is the so-called back tuck sewing.

(movable knife mechanism)

The movable cutter mechanism has: a central cutter 51 forming a central cut; the central cutter 51 is provided at the lower end, and the center cutter 51 is supported in the machine head 12c to be able to slide along the Z-axis direction, not shown in the figure. The cutting rod of the cutting knife; the stepper motor that becomes the driving source of the up and down movement of the central cutting knife 51, that is, the cutting knife motor (not shown); Cylinders (not shown) etc. of the drive source.

Furthermore, the movable cutter mechanism switches between the forward position and the backward position of the cylinder to switch between the following two states, namely: the cutting prohibition state in which the rotational driving force of the cutter motor is not transmitted to the center cutter; and The rotary driving force of the cutter motor is transmitted and converted into a cutting permission state in which the center cutter 51 reciprocates up and down, thereby forming a center cut of a desired length.

(Corner Knife Mechanism)

As shown in Fig. 1 and Fig. 2, the corner cutter mechanism is arranged on the passing path of the large presser feet 21, 21 (refer to Fig. The panel fabric N and the body fabric M conveyed by the large presser foot feed mechanism 20 are inserted from below, and substantially V-shaped corner cuts are formed at the two ends of the central cut.

The above-mentioned corner cutter mechanism includes: two corner cutters 91, 91 arranged at a certain interval along the feeding direction F; a cover member (not shown) covering each corner cutter 91 from its front end side; The power transmission mechanism makes each corner cutter 91 and the cover member move up and down respectively with a motor (not shown).

(binder)

Next, the binder 30 will be described.

As shown in Fig. 1, the binding device 30 has: it is arranged on the rear side of the X-axis direction of the machine needles 41, 41, and is a bottom plate 31 of a long flat plate; The upper riser portion 32.

The binder 30 is supported by an unillustrated support mechanism having an air cylinder, and when not in use, as shown in FIG. 1 , it is in a retracted state away from the needle-down position of the twin needles 41 , 41 . And, when in use, it is lowered by the driving of the air cylinder and arranged at the position of the needle plate.

The bottom plate portion 31 is formed in a rectangular shape, and is supported such that its longitudinal direction is parallel to the X-axis direction during use, and its bottom surface is placed on the upper surface of the sewing machine table 11 to face it.

The vertical plate portion 32 is a rectangular flat plate as a whole. On the upper surface of the bottom plate portion 31, at the middle position in the width direction (Y-axis direction) of the bottom plate portion 31, the vertical plate portion 32 is aligned with the bottom plate portion 31 in the longitudinal direction. It is installed vertically. That is, in the binder 30, the bottom plate part 31 and the upright plate part 32 are integrally formed in the reverse T shape seen from the longitudinal direction.

Here, on the needle plate 13, if the panel fabric N is stacked on the upper side of the body material M pressed by the large presser feet 21, 21, the binding device 30 is placed from above the panel fabric N, and the The both ends of the width direction (Y-axis direction in FIG. 1 ) of the panel cloth N extending from the left and right ends of the bottom plate portion 31 are folded, and stand up from the width direction end portions of the bottom plate portion 31, and after use, The tuck-in plates 61 and 61 described above hold both widthwise end portions of the molding fabric N in a state along the side surfaces on both sides of the vertical plate portion 32 (see FIG. 3 ). That is, the molding cloth N is in a state extending from one side surface of the vertical plate portion 32 to the other side surface via the bottom plate portion 31 . In this way, in the state where the panel fabric N is arranged to be wound on the binding device 30, while the panel fabric N and the body fabric M are conveyed, the double needles 41, 41 are used to sew on both sides of the vertical plate portion 32. system. At this time, the center cut is formed by the up and down movement of the center cutter 51 .

(Large presser foot feeding mechanism)

Next, the large presser foot feed mechanism 20 will be described.

As shown in Fig. 1 and Fig. 2, the large presser foot feeding mechanism 20 includes: a pair of left and right large presser feet 21, 21 for conveying the panel cloth N and the body material M arranged on the edge device 30; The support body 22 of the presser feet 21, 21; the cylinder not shown in the figure that moves the large presser feet 21, 21 up and down through the support body 22; the panel cloth N pressed by the large presser feet 21, 21 and the An unillustrated presser motor that moves the body material M in the material feeding direction F;

Each large presser foot 21,21 has a rectangular shape seen from above, and is supported by the support body 22 so that each longitudinal direction may be along the X-axis direction. In addition, each large presser foot 21, 21 is supported so that its lower surface is parallel to the X-Y plane, and its upper surface is formed at a lower edge side opposite to each other, and its upper surface is wedge-shaped when viewed from the X-axis direction (refer to FIG. 2 to Figure 7). Moreover, on the upper surface of each large presser foot 21, 21, the tuck-in plate 61 of the tuck-in device 60 mentioned later is placed respectively, and each tuck-in plate 61, 61 can follow each large presser foot 21, 21 The sloped upper surface slides towards the edger 30 side.

In addition, the large presser foot 21 can be switched between two positions up and down by the drive of the cylinder. When in the upper position, it is separated from the upper surface of the sewing machine table 11, and becomes the upper surface height of the sewing machine table 11 in the lower position. Moreover, each large presser foot 21,21 is supported in the separated state which can pass at least the vertical plate part 32 of the binder 30 mutually.

The support body 22 is driven by a not-shown presser motor through a not-shown ball screw mechanism, and is supported on the sewing machine table 11 so as to be movable in the X-axis direction. The supporting body 22 is connected to each large presser foot 21, 21 by a large presser foot arm 23 formed into two arms at the front end, and these large presser feet 21, 21 are arranged so as to pass from both sides of the vertical movement path of the double machine needles 41, 41. status.

Here, the tuck-in device 60 mounted on the panel sewing machine 10 of the present embodiment will be described in detail.

The folding device 60 includes: a pair of folding plates 61, 61, which are arranged above the bottom plate portion 31 on the left and right sides of the vertical plate portion 32 of the binding device 30; folding cylinders 62, 62 as a driving mechanism , which is used to fold the panel cloth N along the upper surface of the bottom plate portion 31 by making each folding-in plate 61, 61 move away from the vertical plate portion 32; a pair of support members 63, 63, which pass through The tuck-in cylinders 62, 62 support the front ends of the tuck-in plates 61, 61 so as to be able to swing up and down; part.

The tuck-in plate 61 is a substantially rectangular plate-shaped member whose longitudinal direction is arranged along the X-axis direction, and is arranged to face the upper surfaces of the large pressers 21 and 21 in the standby state (see FIGS. 2 and 3 ). Each tuck-in plate 61, 61 is connected to the movable part P of the tuck-in cylinder 62, 62 by the connection member in the center of the longitudinal direction, respectively.

The tuck-in cylinders 62, 62 are single-acting cylinders, and as shown in FIG. 2, the mutual movable part P is arranged on the side of the binder 30 with its front end facing downward. The tuck-in cylinder 62 is fixedly supported by the support member 63 in a state where the movable portion P is drivable. In addition, the tuck-in cylinder 62 holds the tuck-in plate 61 such that the advancing and retreating direction of the tuck-in cylinder 62 is parallel to the width direction (direction perpendicular to the longitudinal direction) of the tuck-in plate 61 .

The supporting member 63 holds the folded-in cylinder 62 substantially along the Y-axis direction at its upper part, and is rotatable about an axis along the X-axis direction at a pivot point 63a provided at its lower part, and is connected to the large presser foot. The arms 23 are connected.

That is, the supporting member 63 has the function of supporting the above-mentioned fold-in cylinder 62 around the rotation fulcrum 63a so that it can swing in the direction of arrow A or B shown in FIG. The front end portion of the fold-in plate 61 is joined to the movable portion P of the cylinder 62 so that it can move up and down in the direction of the arrow A or B shown in FIG. 2 .

Moreover, the coil spring 64 is provided in the folding-in device 60 of this embodiment.

One end of the coil spring 64 is connected to substantially the longitudinal center of the tuck-in cylinder 62, and the other end of the coil spring 64 is connected to the upper end of the above-mentioned large presser foot 21 (see FIG. 2 ).

The coil spring 64 is a tension spring, and normally urges the end portion on the opposite side of the movable portion P folded into the cylinder 62 upward, that is, in the direction of the arrow A in FIG. 2 . In other words, by applying the biasing force to the fold-in cylinder 62 fixed integrally with the support member 63 by the coil spring 64, the fold-in cylinder 62 is applied toward the arrow A in FIG. At the same time, the front end of the fold-in plate 61 connected to the front end of the movable part P of the fold-in cylinder 62 is applied to the downward side, that is, the direction of the arrow A in FIG. 2 , under normal conditions. force.

In this way, the folding-in device 60 drives each folding-in plate 61, 61 through the folding-in cylinder 62, so that each folding-in plate 61, 61 moves toward the upper surface of the bottom plate portion 31 obliquely downward, and moves closer to the vertical plate portion 32, The front ends of the respective tuck-in plates 61 , 61 are brought into contact with both ends of the panel fabric N extending from the left and right sides of the lower surface of the bottom plate 31 , whereby the panel fabric N is folded into the bottom plate 31 . the upper side of the

In addition, the rubber plate 24 serving as a step portion is attached to the lower surface of the large presser feet 21, 21 in this embodiment, and the rubber plate 24 maintains the height of the outer sides of the left and right ends of the folding plate 61 with respect to the bottom plate portion 31. The height of the tuck-in plate 61 is greater than the total thickness d when the panel fabric N is folded so as to sandwich the bottom plate portion 31 from above and below.

The rubber plate 24 is pasted below it along the length direction of the large presser feet 21, 21, and can be replaced.

In the present embodiment, the initial height when the front end of the tuck-in plate 61 comes into contact with the molding cloth N, that is, the height G maintained by the rubber sheet 24 (segment), is the same as when the molding cloth N is folded from top to bottom. The total thickness d when the bottom plate portion 31 is sandwiched between them is equal to or greater than that, that is, G≧d (see FIG. 5 ). For example, it becomes a height corresponding to the thickness when the total thickness d when thick cloth is folded is about 3.2 mm.

In addition, the inclination of the upper surface of each of the above-mentioned large presser feet 21, 21 is such that the thin panel cloth is folded into the later-described folding plates 61, 61 which are slidably placed on the upper surface of the large presser feet 21, 21. When N, the extension of the moving direction of the front end (dotted line S shown in FIG. 3 ) is formed at a position closer to the bottom plate 31 than the boundary between the bottom plate 31 and the vertical plate 32 of the binder 30 . In addition, reference numerals 25 and 25 denote flap bases (flap bases) on which flaps (flaps) are placed, and are omitted in FIG. 3 , FIG. 5 and FIG. 7 for the sake of simplification of the drawings.

(Sewing operation of panel sewing machine)

Next, referring to FIGS. 3 to 7 , the operation of folding the panel cloth of the panel sewing machine 10 will be described in detail.

In addition, before the folding operation of the panel fabric N, the large presser foot 21 is arranged on the body material M placed on the sewing machine table 11, and then the panel fabric N is arranged between the large presser feet 21 and 21. On the body material M, the binding device 30 is arranged from the upper surface of the panel fabric N (see FIG. 3 ). As a result, both end portions of the molding cloth N are bent upward between the rubber plate 24 and the end portions of the bottom plate portion 31 of the binder 30 . In addition, at this stage, the tuck-in cylinder 62 is in the OFF state, and the tuck-in plate 61 is arranged on the left and right sides of each large presser foot 21, 21, that is, on the high position side of the slope of each large presser foot 21, 21, and, The entire lower surface faces the upper surfaces of the large presser feet 21 and 21 and is in surface contact with them, and the front end side of the fold-in plate 61 is biased downward.

First, the folding operation in the case of folding the thin panel fabric N will be described.

When each tuck-in cylinder 62, 62 is activated, the tuck-in operation starts, and the movable part P of the tuck-in cylinder 62 moves forward (referred to as the moving direction of the tuck-in cylinder 62 during driving). At the same time, each fold-in plate 61, 61 connected with the movable part P of the fold-in cylinder 62 descends obliquely downward on the upper surface of the large presser feet 21, 21, toward the vertical plate portion 32, and presses each large presser foot. The upper surfaces of the legs 21 and 21 approach and move slidingly (see FIG. 4 ).

When the respective front ends of the fold-in plates 61, 61 pass through the edges of the large presser feet 21, 21, they come into contact with the molding cloth N, and the moldings extending from the left and right ends of the bottom plate portion 31 of the binder 30 are brought into contact with the molding cloth N. The left and right ends of the cloth N are folded and guided to the upper surface side of the bottom plate portion 31 .

In the molding sewing machine 10 in this embodiment, as described above, since the thickness (height) of the rubber sheet 24 is set to be folded, it is sufficiently thick even in the molding cloth used for general molding sewing. Therefore, in the case of folding in the thin panel fabric N, the fold-in plate 61 is moved in the original moving direction by the fold-in cylinder 62, that is, in the downward direction on the upper side of the large presser foot 21. Moving (refer to FIG. 5 ), the panel cloth N pressed and folded by the front end of the tuck-in plate 61 is brought into close contact with the upper surface of the bottom plate portion 31 . Then, when the front end of the tuck-in board 61 reaches the top of the folded thin panel cloth, the front end of the tuck-in board 61 is pushed downward by the tuck-in board 61. The molding cloth N slides on the upper surface of the molding cloth N while being pressed toward the bottom plate portion 31 , and advances to the vertical plate portion 32 . That is, since the tuck-in plate 61 is urged downward by the coil spring 64 by the tuck-in cylinder 62 under normal conditions, the front end portion of the tuck-in plate 61 faces the upper surface of the panel fabric N folded along the bottom plate portion 31 . The movement of flattening is performed while applying force downward, and the molding cloth N is guided to the base end portion of the vertical plate portion 32 . Accordingly, the panel cloth N is folded along the bottom plate portion 31 in a good state without slack.

Next, the folding operation at the time of folding in the panel fabric N will be described.

First, the operation of moving the tuck-in plate 61 close to the vertical plate portion 32 by driving the tuck-in cylinder 62 is the same as in the case of tucking in the thin panel fabric N described above.

Then, in the tuck-in device 60 of the panel sewing machine 10 according to the present embodiment, as described above, since the tuck-in of the thick panel fabric N (hereinafter referred to as thick fabric N) is ensured, the The thickness of the rubber sheet 24 is sufficiently thick, so when the fold-in plate 61 is in contact with the thick cloth N, the front end of the fold-in plate 61 contacts the upper surface of the folded thick cloth N from obliquely above (refer to FIG. 6 and FIG. 7).

And, as the thick cloth N is further folded, the front end portion of the tuck-in plate 61 is guided to move along the upper surface of the thick cloth N. As shown in FIG. That is, when the folding plate 61 folds in the thick cloth N, the folding operation continues while pressing the thick cloth N downward from the front end as the folding cylinder 62 is driven.

That is, in the molding sewing machine 10 of this embodiment, since the tuck-in cylinder 62 is supported so as to be swingable around the pivot point 63a of the support member 63, the tuck-in plate 61 can move up and down, so that even when tucking in, Even in the case of a thick molding cloth N, the front end portion can be slidably advanced on the upper surface of the molding cloth N according to the thickness of the cloth, and the cloth can be reliably folded into the upper surface of the bottom plate portion 31 . Therefore, not only in the case of folding in thin cloth, but also in the case of folding in thick cloth, the folding operation can be performed without interruption.

Furthermore, the tuck-in plate 61 is maintained at the advanced position (pressed position) from the start of sewing to the end of sewing after the panel cloth N is folded in and held well before sewing, that is, before the start of needle drop. The state in which the panel cloth N was folded in is continuously maintained.

(Effect of embodiment)

As described above, according to the molding sewing machine 10 of the present embodiment, it is possible to realize a smooth sewing without the tuck-in operation being stopped due to different cloth thicknesses and not being restricted by the cloth thickness of the molding cloth N to be folded in. Fold into action. In addition, since the front end of the tuck-in plate 61 is biased downward, the panel cloth N can be stretched along the upper surface of the binder 30 (especially the bottom plate 31) and folded at the same time. Stabilization of the amount of tuck-in without slack or the like on the panel fabric N. In addition, since there is no need to replace parts every time the thickness of the fabric changes, cost reduction and improvement in work efficiency of the panel sewing machine 10 can be achieved.

In addition, during the operation of the tuck-in plate 61, when the front end portion of the tuck-in plate 61 comes into contact with the panel fabric N, the movement in the traveling direction is not stopped by the panel fabric N. N also enables smooth folding action.

In addition, since the tuck-in board 61 approaches and moves obliquely downward, it can accommodate the cloth thickness of the range corresponding to the height change by the movement of a front-end|tip part. In addition, since the tuck-in plate 61 turns around the base end side of the tuck-in plate 61 , the front end portion of the tuck-in plate 61 can be moved up and down with a simple structure.

In addition, in this embodiment, the tuck-in plate 61 is configured so as to be supported by the tuck-in cylinder 62 and the support member 63 so that the front end can swing around the base end side. A spring member such as a coil spring and an elastic body such as rubber support the fold-in plate 61 so as to be able to move vertically and parallelly, thereby constituting a structure that allows the front end portion to move up and down.

In addition, it is also possible to form a structure that retracts upward when the thick panel cloth is folded in by forming the front end portion of the folding plate 61 into a shape that is bent upward, or by rounding the lower portion of the front end portion (see FIG. 8 ). (a) and (b)).

In addition, the tuck-in cylinder 62 for driving the tuck-in plate 61 is not limited to a single-action type, and may be a double-action type cylinder.

In addition, the height G maintained by the rubber sheet 24 (segment portion) is equal to or greater than the total thickness d when the panel cloth N is folded so as to sandwich the bottom plate portion 31 from top to bottom (G≥ d), but it is desirable to conceive the panel N in this case as the thickest panel N in the range generally used in sewing.

Claims (4)

1. A molding sewing machine, It includes: A binding device having a bottom plate and a vertical plate vertically installed on the bottom plate, and guides the panel cloth placed on the body fabric to the needle drop along the bottom plate and the vertical plate Location; Fold-in device, which has a pair of fold-in boards, the pair of fold-in boards are arranged on both sides of the vertical plate part of the edger, and are arranged above the bottom plate part, and each of the fold-in boards is driven Driven by the mechanism, it moves close to the vertical plate, and the front end of each fold-in plate folds the two ends of the strip cloth extending from the left and right ends of the bottom plate toward the upper side of the bottom plate, so as to fold in the inlaid cloth, It is characterized in that, The tuck-in device includes: a pair of support members independently supporting the tuck-in plates so that the front ends of the tuck-in plates can move up and down; A urging member that urges the front end of the folded panel. 2. The molding sewing machine according to claim 1, characterized in that, The fold-in device has a section that maintains the height of the fold-in plate from the upper surface of the body fabric, so that the pair of fold-in plates are driven by the driving mechanism and move close to fold in the fold-in plate. In the case of the strip cloth, the front end of each tuck-in board is positioned outside the left and right ends of the bottom plate at a height equal to or greater than the total thickness when the strip is folded so as to sandwich the bottom plate from top to bottom. 3. The molding sewing machine according to claim 1 or 2, characterized in that, The tuck-in device is configured such that when the pair of tuck-in plates is driven by the drive mechanism to move closer to fold in the panel cloth, the front end portion faces obliquely downward toward the upper surface of the bottom plate portion. close to mobile. 4. The molding sewing machine according to claim 1, characterized in that, The fold-in plate is connected to the movable part of the cylinder as the driving mechanism through a connecting member in the middle of the longitudinal direction thereof, The support member supports the cylinder around the fulcrum so that the cylinder can swing, In addition, one end side of the coil spring as the biasing member is connected to the center in the longitudinal direction of the cylinder, the other end side of the coil spring is connected to the upper end of the large presser foot, and the folds are aligned downward. Apply force to the front end of the entry plate.

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