JPH0531278A - Automatic sewing device - Google Patents

Abstract

PURPOSE:To improve the productivity, to reduce the product cost, and also, to eliminate the need of skill of a worker by automatizing an edge processing process for folding back a peripheral edge of a cuff of a T shirt, the skirt, etc., to the reverse side and sewing them by a sewing machine for flat sewing. CONSTITUTION:On one side of a carrying bed 11 for carrying sewing cloth toward the bed 2a of the sewing machine on a feed table 13, a folding part 4 formed by combining a cloth guide 40, an edge guide 41 and a hemming guide 42 being all like a plate is constituted. First of all, the sewing cloth carried by allowing a side edge to run along one side 15a of a rule plate 15 is dropped into an opening part 13a, the part of prescribed width from the side edge is folded downward, the upper face of this sewing cloth is supported by the lower face of the cloth guide 40, and while holding up the folded side edge to the upper part by the edge guide 41, the end edge of the hemming guide 42 is folded back to the reverse side of the sewing cloth as a crease. The lower side of this folded-back part is supported by an auxiliary carrying belt 12, and guided to a sewing position on the bed 2a by this auxiliary carrying belt 12 and the carrying belt 11.

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 for automatically hem-sewing the peripheral edges of cuffs and hem openings of a T-shirt in a flat cloth state by a sewing machine for plain stitching.

[0002]

2. Description of the Related Art In a cuff and a hem of a T-shirt, a part of a predetermined width is folded back from the peripheral edge of a sewing cloth in order to impart an appropriate aesthetic feeling and to enhance resistance to friction with a body or other cloth. Edge processing is performed to sew each other in a state of being overlapped with the back surface of the sewing material to form a cylindrical portion along the peripheral edge. Conventionally, the following two methods have been generally adopted for this kind of edge treatment.

The first method shown in FIG.
A part of a predetermined width is folded back from the side edge 50 of the sewing machine, superposed on the back surface of the sewing material 5 and fed onto the sewing bed of the sewing machine, and then, as indicated by the arrow in the figure, from the front side by the single or plural needles. Is a method of forming the tubular portion 51 by performing plain stitches (flat stitch, single chain stitch, double chain stitch, etc.), and the second method shown in FIG. 2 is similar to the first method. After folding, the sewn material 5 is folded back in the opposite direction with the side edge 50 overlapped on the back surface as a fold line, and between the side edge 50 and the sewn material 5 laminated in two layers below the side edge 50, This is a method in which overedging is performed as indicated by an arrow in the figure, and finally the folded-back portion is extended to obtain the tubular portion 51.

Each of these methods has contradictory drawbacks. In the first method, a flat finish can be obtained on both front and back surfaces, whereas in the second method, a finished finish is obtained. There is a problem that the narrow strip portion 52 required for overedging protrudes on the back surface of the sewing cloth 5 to deteriorate the wearing comfort. On the contrary, in the second method, the sewing cloth 5 after finishing is finished.
No seams appear on the surface of the sewing machine, whereas in the first method, the seams are unavoidable on the surface of the sewn fabric 5, which has the drawback of impairing aesthetics.

However, the difficulty in the first method, namely,
The quality of the aesthetics due to the appearance of the seams is based on the subjective judgment of the consumer, and by selecting the appropriate stitch type from among the various stitch types stipulated in JIS L 0120, some aesthetic Can be maintained. Figure 3
It is a detailed view of the seams when the two-needle flat stitches designated by the symbol 406 in JIS L 0120 are adopted. In this case, two seams 53 which are parallel to each other are formed on the surface of the sewing material 5.
Only 53 are arranged regularly, and the degree to which aesthetics are impaired is small. For these reasons, in Japan, products treated by the first method tend to be preferred to those treated by the second method, and the first method is exclusively used for the peripheral treatment of cuffs and hem. Has been adopted.

[0006]

However, when the edge treatment is performed by the first method, as described above, the portion of the predetermined width is folded back from the side edge 50 and is folded over on the back side of the sewing material 5. It is necessary to hang the sewing machine from the front side, and there is a problem that a high degree of skill is required to perform the sewing operation while forming a folded portion having a uniform width and obtain a good finished state. That is, the above-described conventional edge treatment actually depends on manual work by a skilled sewing manufacturer, and there is a problem that it is difficult to improve productivity and reduce product cost.

The present invention has been made in view of the above circumstances, and realizes an improvement in productivity and a reduction in product cost by automating the edge processing by a sewing machine for plain stitches such as cuffs and hem openings of T-shirts. In addition, it is an object of the present invention to provide an automatic sewing device that does not require the skill of an operator.

[0008]

SUMMARY OF THE INVENTION An automatic sewing device according to the present invention includes a feed table extending along the upper surface of the bed on both sides in the feed direction of a sewing material on a bed of a plain stitch sewing machine. A conveyor belt that is mounted between both extended ends of the feed table and that conveys the sewing material in the feed direction while holding the sewing cloth on the upper portion thereof; and a conveyor belt that is located upstream of the bed along one side of the conveyor belt. Fixed on the feed table, the portion of a predetermined width from one side edge of the sewing fabric is conveyed downward by the conveying belt, first bent downward, and then the side edge on the bent side is biased upward, A plurality of guide plates that are folded over the back surface of the sewing material, and are mounted along the upper surface of the bed between the terminal ends of these guide plates and the downstream end of the feed table, and are formed by the guide plates. Near the fold line An auxiliary conveyance belt that supports the lower side of the conveyance belt and conveys the conveyance belt in synchronization with the conveyance belt, and guides the folded portion of the one side edge sandwiched between the conveyance belt and the conveyance belt to the suture position on the bed. And is provided.

[0009]

According to the present invention, the sewing material placed on the feed table on the upstream side of the sewing material by the sewing machine in the feeding direction is conveyed to the sewing machine by the operation of the conveyor belt while the sewing cloth is conveyed to the sewing machine. A state in which a portion of a predetermined width is first bent downward from one side edge by the action of a plurality of guide plates fixed midway, and this side edge is further biased upward and folded on the back surface of the sewing material. Becomes This folded portion is delivered to an auxiliary conveyor belt arranged in parallel with the conveyor belt on the terminal end side of the guide plate, and is further conveyed by a synchronous operation of the auxiliary conveyor belt and the conveyor belt to be guided onto the bed of the sewing machine. To be done. After that, while being fed by the operation of the well-known feed mechanism built in the bed, the sewing machine body is operated to correctly and linearly stitch the predetermined position along the side edge from the surface side to achieve the desired edge treatment. It

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 4 is a schematic front view schematically showing the entire structure of the automatic sewing device according to the present invention (hereinafter referred to as the device of the present invention). The device of the present invention is a bed 2a on which the sewing machine body 2 is mounted.
Is formed on the base 1 which is fixedly provided at approximately the center in the longitudinal direction.

As shown in the figure, the base 1 is substantially horizontal on both sides (left and right in the drawing) of the sewing material 5 (see FIG. 5) in the feeding direction on the bed 2a when sewing with the sewing machine main body 2. A feed table 13 is extended, and the feed table 13 has a conveyance belt 11 and an auxiliary conveyance belt 12 whose conveyance direction is the extending direction of the feed table 13, which are separated by an appropriate length in the width direction as described later, They are mounted parallel to each other.

The conveyor belt 11 is located at the upstream (right side in the figure) end of the feed table 13 and is driven by a pair of driven pulleys 16 and 17 which rotate about different horizontal axes parallel to each other. The driven pulley located at the downstream (left side in the figure) end
It is bridged between a drive pulley 18 that rotates about each horizontal axis that is parallel to 16 and 17 and a pair of tensioning pulleys 19 and 20, and as shown in the drawing, the driven pulley 16 and the drive pulley.
It is located along the upper surface of the feed table 13 between 18 and.

Further, the auxiliary conveyor belt 12 rotates about respective horizontal axes parallel to the pulleys, and the driven pulley 25 located on the lower side of the upstream side of the fixed position of the bed 2a, and the driven pulley 25. Driven pulley 26 located slightly upstream on the downstream side
And a drive pulley 22 (see FIG. 6) that rotates coaxially with the drive pulley 18 at the downstream end of the feed table 13, and as shown in the figure, the driven pulley 26 and the drive pulley 22 are connected to each other. A plurality of guide plates, which will be described later, on the auxiliary table 13 facing the upstream side of the exposed end of the auxiliary conveyor belt 12 onto the auxiliary table 13. The folding part 4 is formed.

Further, on the upper surface of the feed table 13 on the downstream side of the bed 2a, a thread stand, a sewing thread guide, a sewing thread roll, etc. are provided, and a sewing thread supply section 6 for supplying the sewing thread to the sewing machine main body 2 is provided. A stacker 7 for receiving the sewn sewn fabric 5 is configured.

FIG. 5 is a perspective view from the upper side of the apparatus of the present invention on the upstream side (the right side in FIG. 4) in the transport direction by the transport belt 11. As is clear from this figure, the upstream side of the conveyor belt 11 is a thin plate-like mounting plate fixed on the feed table 13.
By 14, the upper part is covered over a predetermined length, and on the feed table 13 on one side in the width direction of the conveyor belt 11,
A ruler plate 15 is fixed along its one side 15a in the longitudinal direction thereof, that is, in the direction of conveyance by the conveyor belt 11. The ruler plate 15 is fixed by tightening a pair of fixing screws 15b and 15b (one of which is shown in FIG. 7) at positions that are appropriately spaced apart in the longitudinal direction. The position can be adjusted within a predetermined range with the fixing screws 15b, 15b loosened.

Further, the conveyor belt 11 is provided with a large number of through holes 11a, 11a ... Which penetrate the conveyor belt 11 in the thickness direction, and the lower side of the conveyor belt 11 is arranged along the lower surface thereof. The intake box 3 is attached. This intake box 3 has a large number of intake holes 3a, 3a ... Penetrating the upper surface inward and outward, and as shown in FIG. It is attached to the lower side of the conveyor belt 11 and is connected to a vacuum source 3b fixed to the lower part of the base 1 via an intake pipe 3c.

As shown by a chain double-dashed line in FIG. 5, the sewing material 5 which has been cut into a predetermined shape in advance has the side edge to be subjected to the edge treatment aligned with the one side 15a of the ruler plate 15 on the mounting table 14. The sewn cloth 5 is conveyed by the operation of the conveyor belt 11 while driving the vacuum source 3b and evacuating the inside of the intake box 3 through the intake pipe 3c. At this time, air is taken into the air intake box 3 through the air intake holes 3a, 3a ... And the through holes 11a, 11a .. This air intake causes the sewing cloth 5 to be adsorbed and held on the surface of the conveyor belt 11. The sewing cloth 5 can be stably transported by the operation of the transport belt 11, and the folding operation, which will be described later, in the folding section 4 in the middle of this transportation can be reliably performed. It should be noted that the sewing cloth 5 itself has a sufficient self-weight, so that stable conveyance is possible due to frictional resistance between the sewing cloth 5 and the conveyor belt 11, and the resistance due to folding at the folding section 4 can be resisted. In some cases, the vacuum source 3b may not be driven and the sewing material 5 may not be attracted.

FIG. 6 shows a conveyor belt 11 and an auxiliary conveyor belt.
FIG. 6 is a perspective view showing a mounted state of 12 on the downstream side (the left side in FIG. 4) in the transport direction. The conveyor belt 11 is connected to the drive pulley 18 and the pair of tension applying pulleys 19 and 20, and the auxiliary conveyor belt 12 is
A drive pulley 22 coaxially connected to one side of the drive pulley 18
The drive pulley 18 and the drive pulley 22 are fixed to the lower portion of the base 1 via a transmission pulley 23 on one side and a transmission belt 21 wound around the transmission pulley 23. The driving force of the belt driving motor M ₁ (see FIG. 4) is transmitted. This belt drive motor M
_A sewing machine drive motor M ₂ is fixed to one side of the bed ₁ below the bed 2a, and the sewing machine main body 2 is driven by belt transmission from the sewing machine drive motor M _2. is there.

The separation distance between the tension applying pulleys 19 and 20 can be changed by operating an adjusting mechanism (not shown), and the initial tension of the conveyor belt 11 can be appropriately set by this change. That is, the conveyor belt 11 is provided on the feed table 13
The belt is exposed in a state where a predetermined tension is applied to the upper side, and is driven to rotate in the transport direction by the driving force of the belt driving motor M ₁ transmitted to the driving pulley 18,
At this time, the auxiliary conveyor belt 12 is also rotationally driven in synchronization with the rotation of the conveyor belt 11, as shown in FIG.

FIG. 7 is a perspective view from above of the device of the present invention from the upstream end of the feed table 13 shown in FIG. 5 to slightly before the bed 2a, showing the characteristic parts of the device of the present invention. As shown in the figure, the feed table 13 has an opening 13a which faces the end of the ruler plate 15 and extends along one side of the conveyor belt 11, and the folding portion 4 is provided on one side of the conveyor belt 11. Place one side edge close to the opening,
A rectangular flat plate-shaped cross guide 40 fixed in a manner to cover 13a, an edge guide 41 laminated under the cross guide 40 and fixed together, and attached to the lower side of the conveyor belt 11. And the hemming guide 42 fixed along the upper edge of the air intake box 3 on the side of the opening 13a, and the sewing cloth 5 sucked and held on the conveyor belt 11 and conveyed by the action of these guide plates. It acts to fold the side edges of.

The upstream end of the cross guide 40 faces the downstream end of the ruler plate 15, and as described above, the ruler plate 15 is provided.
In order to receive the sewn cloth 5 conveyed along one side 15a in the lower side, the sewn cloth 5 is raised in an arc shape upward. The edge guide 41 has a width smaller than that of the cross guide 40, and is a rectangular flat plate-shaped base portion that is substantially aligned in the width direction with respect to one side 15a of the ruler plate 15 by being fixed to the edge guide 41 by being laminated with the cross guide 40. 41a, and a guide protrusion 41b that projects downwardly toward the conveyor belt 11 side at approximately the center in the longitudinal direction of the base 41a. Further, as shown in the drawing, the hemming guide 42 gradually increases the protruding length toward the space between the guide protrusion 41b of the edge guide 41 and the lower surface of the cross guide 40 along the conveyance direction of the conveyance belt 11. The front part 42a and the end of it are connected to the bed
A rear portion 42b extending up to 2a.

At the downstream end of the cross guide 40, a thin and thin cross plate 43 extending along the rear portion 42b of the hemming guide 42 is fixed and is elastically contacted with the upper surface of the conveyor belt 11. Further, an air pipe 44, which is fixed to the upper surface of the downstream end of the ruler plate 15 at its midway portion, intrudes into the lower part of the upstream side of the cross guide 40 through the gap between the cross guide 40 and the opening 13a of the feed table 13. I am allowed to do it.

One driven pulley 25, on which the auxiliary conveyor belt 12 is mounted between the drive pulley 22 and the driven pulley 22, is pivotally supported below the upstream end of the cross guide 40 as shown in the drawing.
The other driven pulley 26 is a guide protrusion 4 of the edge guide 41.
Slightly downstream of 1b, its upper portion is pivotally supported with its upper surface substantially aligned with the upper surface of the feed table 13. Thus these driven pulleys
The auxiliary conveyor belt 12 mounted on 25 and 26 has guide projections 4
It is exposed on the feed table 13 on the slightly downstream side of 1b and extends toward the downstream side along the conveyor belt 11, and the rear portion 42b of the hemming guide 42 has the auxiliary conveyor belt 12
Face each other with a small gap on the upper surface of.

FIG. 8 is a perspective view from above of the device of the present invention on the downstream side of FIG. As shown in this figure, the rear portion 42b of the hemming guide 42 and the cross plate 43 extend to both sides in the width direction of the presser foot 30 projecting from the lower portion of the sewing machine main body 2, and are indicated by two-dot chain lines in the figure. When the sewing material 5 that has reached the position shown in Figure 2 is caught between the presser foot 30 on the bed 2a and is sewn by the needle 31 that moves up and down by the operation of the sewing machine main body 2, the hemming guide 42 is folded. The folded portion formed by the operation of the section 4 described below is securely held between the auxiliary conveyor belt 12 and the auxiliary conveyor belt 12, and the cross plate 43 elastically contacts the conveyor belt.
The side of the sewing cloth 5 being sewn is securely pressed between the sewing machine 11 and the sewing machine 11, and the feeding mechanism (not shown) incorporated in the bed 2a serves to assist the feeding of the sewing cloth 5.

On the upstream side of the sewing machine main body 2, an air pipe 45 is fixed so that its tip faces the biting position of the presser foot 30. The air pipe 45 conveys the air jetted from the tip as described above. It is sprayed on the upper surface of the sewn cloth 5 to be sewn to suppress the swelling of the upper surface, and has the effect of reliably engaging the presser foot 30.

FIG. 9 is a front view of the sewing machine main body 2. As shown in this figure, the upstream side surface of the sewing machine main body 2 projects light toward the surface of the hemming guide 42 positioned below the sewing machine main body 2. A photoelectric sensor 32 is fixedly provided for detecting the presence or absence of supply of the sewing cloth 5 by receiving the reflected light from the projection position. The photoelectric sensor 32 normally receives the reflected light from the hemming guide 42 having a high reflectance, but when the sewing cloth 5 is supplied so as to cover the upper surface of the hemming guide 42, the sewing operation is performed. Since the reflected light from the cloth 5 is received, the light receiving level is lowered. That is, it is detected that the sewing cloth 5 has been supplied due to the decrease in the light receiving level.

Further, a presser foot 30 is provided on the downstream side of the sewing machine main body 2.
A thread cutting knife 33 is arranged so as to face the side of the sewing fabric 5 from the above. The thread cutting knife 33 is an air cylinder fixed to the downstream side surface of the sewing machine body 2 via a bracket 34.
The air cylinder fixed to the tip of the output rod of 35
According to the advancing operation of 35, it projects to a position close to the upper surface of the bed 2a.

Further, on the downstream side of the sewing machine main body 2, cloth scissors rubber 36 is arranged so as to face the upper surface of the feed table 13.
FIG. 10 is a perspective view showing an arrangement mode of the cloth scissors rubber 36. The cloth scissors rubber 36 shown in the figure is fixed to the tip of the output rod of the air cylinder 37. This air cylinder 37
Is a holding arm 39 whose base end is fixed to a leg portion 38 which is erected on the feed table 13 on one side of the auxiliary transport belt 12 and which extends to the feed table 13 on the other side of the transport belt 11. The scissors rubber 36 is pressed against the upper surface of the feed table 13 by this advancing operation and is conveyed by the conveyor belt 11 between the upper and lower surfaces. The sewn cloth 5 is clamped in and the conveyance of the sewn cloth 5 is restricted.

The operation of the apparatus of the present invention configured as described above is performed in accordance with the operation of the control panel 10 (see FIG. 4) installed on the feed table 13 upstream of the conveyor belt 11 with a proper distance. Be seen. Sewing conditions such as the rotation speed of the sewing machine main body 2 are set on the control panel 10, and the sewing machine main body 2
The detection signal output from the photoelectric sensor 32 is given when the sewing cloth 5 arrives immediately before. The conveyor belt 11
The speed, by the operation of the not shown speed controller is attached to the vicinity of the base 1 left of the belt drive motor M _1, it is automatically adjusted in synchronization with the rotation speed of the sewing machine body 2.

Power supply to the belt drive motor M ₁ is performed in response to an ON operation of a power switch (not shown), whereby the conveyor belt 11 and the auxiliary conveyor belt 12 are continuously driven, and the vacuum source 3b. Are driven to evacuate the inside of the intake box 3, and air is supplied to the air pipes 44, 45. When the sewing cloth 5 is placed on the mounting table 14 at the upstream end of the feed table 13 as shown in FIG. It is adsorbed and held by and is conveyed as described above, and reaches the folding portion 4 formed in the middle of this conveying path.

A foot switch 8 is arranged on the floor below the base 1, and when the foot switch 8 is depressed, the conveyor belt 11 and the auxiliary conveyor belt 12 are stopped. When the control panel 10 cannot be operated due to some accident, the sewing machine main body 2 and the stacker 7 are pressed by pressing the emergency stop switch 10a (see FIG. 4) attached to one side of the control panel 10. Also, the operation of the thread cutting knife 33 can be stopped.

11 to 14 are explanatory views of the folding operation by the folding section 4, FIG. 11 shows a cross section taken along the line AA in FIG. 5, and FIG. 12 shows a line BB in FIG. , Fig. 13
Also shows a section taken along the line CC, and FIG. 14 shows a section taken along the line D-D.

The sewing cloth 5 placed on the placing table 14 is shown in FIG.
As shown in FIG. 11, the middle portion in the width direction is adsorbed and held by the conveyor belt 11, and one side edge is along one side 15a of the ruler plate 15 and is conveyed while sliding on the feed table 13. The sewing cloth 5 that has reached the opening 13a formed in the feed table 13 by this conveyance is introduced to the lower side of the cross guide 40 as shown in FIG. 12, and the opening 13a is formed with the side edge of the conveyor belt 11 as a fold line.
Bends downward in a manner of hanging inward.

The openings 1 are arranged as described above.
The tip of the air pipe 44 that enters the inside of 3a faces the hanging lower end of the sewing material 5, and this hanging lower end is blown upward by the air jetted from the tip of the air pipe 44, and as shown in FIG. It is surely handed over to 41. Further, the middle part of the air pipe 44 has a function of assisting the initial bending of the sewn cloth 5, and also has a function of preventing the hanging portion of the sewn cloth 5 from waviness due to jet air from itself.

The sewing cloth 5 in such a bent state is
It is further conveyed by the operation of the conveyor belt 11, but below the cross guide 40, the protrusion length of the guide protrusion 41b of the edge guide 41 increases with the conveyance, while the intake box 3
Since the hemming guides 42 fixed to the side edges of the sewing cloth also increase the projecting length toward the cross guides 40, the sewing material 5 is guided by guide projections 41b as shown in FIG. As a result, the side edge is pushed up, and a fold line gradually comes closer to the cross guide 40 along the edge of the hemming guide 42.As shown in FIG. 14, a portion having a predetermined width from the side edge is hemmed. With the guide 42 sandwiched between them, the guide 42 is folded on the back side.

The edge guide 41 on the side edge of the sewing material 5
The delivery to the upper side is surely performed because the side edge is blown up by the air blown from the air pipe 44, and the folded portion generated as shown in FIG. 14 is provided on the downstream side of the edge guide 41. The bed of the sewing machine main body 2 is surely delivered onto the auxiliary transport belt 12 reaching the feed table 13, and supported by the auxiliary transport belt 12 on the lower side thereof, while keeping the fold line due to the edge of the hemming guide 42.
It is transported onto 2a.

FIGS. 15 and 16 are explanatory views of the operation of the device of the present invention after the folding process as described above. The sewn cloth 5 having the side edges folded as described above is further conveyed by the operation of the conveyor belt 11 and the auxiliary conveyor belt 12, and the bed
The detection area of the photoelectric sensor 32 arranged in front of the presser foot 30 on the 2a is reached. As described above, the photoelectric sensor 32 detects the arrival of the sewing material 5 due to the decrease in the light receiving level, and when this detection signal is given to the microcomputer in the control panel 10, the sewing machine drive motor M is driven according to the drive command issued from this microcomputer. ₂ is driven for a predetermined time, and the sewing operation of the sewing machine main body 2 is performed by the transmission from the motor M ₂ . By this sewing operation, the sewing material 5 is subjected to flat stitching from the front surface side by the two needles 31, 31 which move up and down substantially at the center of the presser foot 30, as shown in FIG. The desired edge treatment in which the folded side edges are stitched is automatically realized.

The duration of the drive command is determined by the control panel 10
The sewing operation of the sewing machine main body 2 is determined by the calculation in the microcomputer in accordance with the sewing condition set in the next sewing cloth at the timing immediately before the end of the sewing cloth 5 is separated from the presser foot 30. It can be stopped until 5 is supplied.

The microcomputer in the control panel 10 issues an advance command to the air cylinder 37 when the sewing machine main body 2 is stopped, and a retreat command when the next sewing operation is started. That is, the air cylinder 37 advances as soon as the operation of the sewing machine main body 2 is stopped, and serves to press the cloth scissors rubber 36 fixed to the tip of the output rod onto the feed table 13. At this time, the tip of the sewing material 5 whose end is held by the presser foot 30 when the operation of the sewing machine main body 2 is stopped is located at the pressing position, and this tip is on the side of the conveyor belt 11. It is sandwiched between the cloth scissors rubber 36 and the feed table 13 as shown in FIG. That is, when the sewing machine main body 2 is stopped, the sewing cloth 5 has its tip end between the cloth scissors rubber 36 and the feed table 13 and its end end with the presser foot 30.
And the feeding table 13 are sandwiched between the feeding belt 13 and the feeding table 13, and the feeding by the feeding belt 11 and the auxiliary feeding belt 12 is restricted.

As described above, this restraint is applied to the next sewing material 5
Is released immediately before the presser foot 30 is supplied, in response to a retreat command to the air cylinder 37. At the same time, the sewing operation of the sewing machine body 2 is restarted, and the sewn sewing material 5 is discharged to the rear side of the presser foot 30. At this point, the microcomputer in the control panel 10 has the air cylinder 35
Issue a one-time advance and subsequent withdrawal commands. As a result, the thread cutting knife 33 fixed to the tip of the output rod of the air cylinder 35 projects to the vicinity of the surface of the bed 2a, and the operation of cutting the sewing thread pulled out to the rear side of the presser foot 30 as the sewing material 5 is discharged is eliminated. The connection between the discharged sewing cloth 5 and the next supplied sewing cloth 5 is cut off.

The timing of transmitting the above-mentioned operation command to the air cylinders 35, 37 is determined by the photoelectric sensor 32 for sewing the cloth 5
Is determined by a predetermined calculation performed in the microcomputer using the sewing conditions set in the control panel 10 as a reference.

The sewing cloth 5 discharged from the sewing machine main body 2 in this manner is a stacker 7 arranged at the end of the feed table 13.
According to the well-known operation, after being pulled out for a predetermined length, it is dropped downward, and is collected in a state of being sequentially stacked on the cross bar 9 (see FIG. 4) which is horizontally installed at the end of the base 1.

In this embodiment, the feeding table 13
It was explained as if the sewing cloth 5 was placed on the mounting table 14 at the upstream end of the sheet and the sewing cloth 5 stacked on the crossbar 9 was collected by the operation of the stacker 7 manually. By automatically using the robot capable of gripping the sewing cloth 5, it is possible to completely unmanner the entire edge processing step of the sewing cloth.

[0044]

As described in detail above, in the apparatus of the present invention, while the sewing material placed on the feed table is conveyed toward the sewing machine by the operation of the conveyor belt, it is fixed in the middle of the conveyor path. By the action of the multiple guide plates
A portion of a predetermined width from the side edge is folded on the back surface, and this folded portion is transferred to the auxiliary conveyor belt on the terminal side of the guide plate, and the synchronous operation of this and the conveyor belt is performed. Will guide you on the bed of the sewing machine.
The present invention has excellent effects such that the edge treatment process by the plain stitch sewing machine such as the cuffs and the hem of the shirt is automated, the productivity is improved and the product cost is reduced without requiring the skill of the operator. Play.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an edge processing method by plain stitching.

FIG. 2 is an explanatory diagram of an edge processing method by overedging.

FIG. 3 is a detailed view of a seam formed by edge processing by two-needle flat stitch.

FIG. 4 is a front view showing the overall configuration of the device of the present invention.

FIG. 5 is a perspective view of the device of the present invention on the upstream side in the transport direction of the sewing material.

FIG. 6 is a perspective view showing a mounted state of a conveyor belt on a downstream side of a sewing material in a conveyor direction.

FIG. 7 is a perspective view of a characteristic portion of the device of the present invention.

FIG. 8 is a perspective view of the vicinity of a sewing position by the sewing machine main body.

FIG. 9 is a front view of the sewing machine main body.

FIG. 10 is a perspective view showing an arrangement mode of cloth scissors rubber on the downstream side of the sewing machine main body.

FIG. 11 is a diagram for explaining the operation of the device of the present invention.

FIG. 12 is an operation explanatory diagram of the device of the present invention.

FIG. 13 is a diagram for explaining the operation of the device of the present invention.

FIG. 14 is an explanatory diagram of the operation of the device of the present invention.

FIG. 15 is a diagram for explaining the operation of the device of the present invention.

FIG. 16 is a diagram for explaining the operation of the device of the present invention.

[Explanation of symbols]

 1 Base 2 Sewing machine main body 2a Bed 3 Air intake box 4 Folding part 5 Sewing cloth 10 Control panel 11 Conveyor belt 12 Auxiliary conveyor belt 13 Feed table 15 Ruler plate 30 Presser foot 31 Needle 32 Photoelectric sensor 33 Thread cutting knife 36 Cloth scissors rubber 40 Cross guide 41 Edge guide 42 Hemming guide 43 Cross plate 44 Air pipe 45 Air pipe

Claims (1)

Claims: 1. A feed table extending along the upper surface of the bed on both sides in the feed direction of the sewing material on the bed of the plain stitch sewing machine, and both extensions of the feed table. A conveyor belt that is mounted between the ends and that conveys the sewing material in the feed direction while holding the sewing cloth on the upper portion thereof, and is fixed on a feed table upstream of the bed along one side of the conveyor belt. , A part of a predetermined width from the one side edge of the sewing cloth is first bent downward along with the conveyance by the conveyor belt, and then the side edge on the folding side is biased upward to be folded on the back surface of the sewing cloth. A plurality of guide plates to be overlapped with each other, and between the terminal end side of these guide plates and the downstream end of the feed table, mounted along the upper surface of the bed, below the fold portion formed by the guide plates. Support the side and carry And an auxiliary conveyance belt that conveys the belt in synchronization with the conveyance of the belt and guides the folded portion of the one side edge sandwiched between the conveyance belt and the belt to the suture position on the bed. Automatic sewing device.