JP2001170378A - Binding sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the end position of a flap in a stage prior to starting sewing and to adjust the moving quantity of a cloth pressing mechanism of a cloth transfer mechanism according to the end position of the flap. SOLUTION: This binding sewing machine is provided with a cloth transfer mechanism 3 holding the state of a flap F overlapped on binding cloth W, E and moving the overlapped cloth W, E, F from a first position P1 in front of a needle into a second position P2 behind the needle, and a flap feeding device 6 having a cloth placing base 8 disposed near the first position P1 to place the flap F, and transferring the flap F on the cloth placing base 8 onto the binding cloth W, E held by the cloth transfer mechanism 3. The binding sewing machine is further provided with a detecting device 9 for detecting the position in the cloth feeding direction of the flap F placed on the cloth placing base 8, and a control device 11 for determining the first position P1 on the basis of the detected result and controlling to drive the cloth transfer mechanism 3 into the first position P1 on the basis of the determined result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball stitch sewing machine which is designed to sew a flap (hanging) on a pocket at the same time when sewing a pocket of clothing. .

[0002]

2. Description of the Related Art Conventionally, when a pocket with a flap is manufactured, a sewing machine configured to sew a flap (hanging) on a pocket at the same time as sewing a bead is used.

[0003] First, as shown in FIG. 10 (a), a blanket E is folded in an inverted T-shape on the surface of a body cloth W constituting a front body of a suit and the like, and is then superposed on FIG. 10 (b). As shown, the flap F and the outer cut piece G1 of the pocket bag are overlapped on one bent end of the quilt E, and the inner cut piece G2 of the pocket bag is overlapped on the other bent end. Next, FIG.
As shown in (c), a slightly inward part is sewn in parallel from both bent ends of the ball cloth E, and the body cloth W and the ball cloth E (these two cloths are referred to as ball cloth) and a flap cloth. F is sewn together with the pocket bag cutting pieces G1 and G2. Then, FIG.
In the step (d), as shown in FIG. 11, the center portion of the ball cloth E is cut open along with the body cloth W with a predetermined length scalpel along the cloth feeding direction to form pocket holes H. To form angled cuts C, C. Then, as shown in FIGS. 10D and 10E, the seam allowance of the ball cloth E and the cut pieces G1 and G2 of the pocket bag are arranged on the back side of the body cloth W through the pocket holes H. The edges of Gl and G2 are sewn together to form a pocket bag, and finally, reinforcing stitches are applied to both ends of the pocket hole H to complete the pocket with flap.

[0004] The above steps have conventionally been performed manually, but the automation has been advanced year by year.
A ball stitch sewing machine capable of automatically performing all the steps from (a) to (d) has been proposed.

[0005] As shown in FIG.
A two-needle sewing machine 2 for sewing both bent ends of the ball cloth E, and a body cloth W is narrowly pressed against the sewing machine table surface 1a, and the sewing machine is moved along the sewing machine table surface 1a along with the body material W. And a cloth transfer mechanism 3 that is movable between a first position (P1) and a second position (P2) separated in the cloth feed direction with the needle drop point NP therebetween.

The first position (P1) is a sewing preparation position, which supplies the blanket E onto the body cloth W and cooperates with the cloth holding mechanisms 25 provided in the cloth transfer mechanism 3 to form the blanket. A folding mechanism 4 for folding E in an inverted T-shape, a flap supply device 6 for supplying a flap F to one bent end of the quilt E,
A first cloth supply device 7a for supplying the inside cutout piece G1 of the pocket bag and a second cloth supply device 7b for supplying the outside cutout piece G2 of the pocket bag at the other bent end of the blanket E are provided. ing. The pocket hole H is located at the second position (P2).
Corner knife mechanisms (not shown) for forming angle-shaped cuts C, C are provided at both ends.

In this apparatus, the body cloth W is set on the sewing machine table surface 1a at the first position (P1), and the folding mechanism 4, the placement table 8 of the flap supply device 6, the first and second cloths are set. The placement tables 50a, 50 of the supply devices 7a, 7b, respectively.
After the flap F and the pocket bag cutting pieces G1 and G2 are set in b, when the apparatus is started up, the folding mechanism 4 is first operated to place the folding mechanism 4 on the lower surface of the cloth holding portion 29a.
Is held from the cloth table 4a. Thereafter, the folding mechanism 4 moves onto the cloth transfer mechanism 3 and then descends to overlap the ball cloth E on the surface of the body cloth W (FIG. 10A).
Next, the flap supply device 6 is operated, and as shown in FIG. 13, the flap cloth F is moved to one bent end of the ball cloth E. Subsequently, the first cloth supply device 7a and the second cloth supply Device 7b
Is activated, and the cloth placement table 50a is
The inner cut piece G1 of the upper pocket bag is moved to one bent end of the staple E, and the outer cut piece G2 of the pocket bag is moved to the other bent end by the second cloth supply device 7b. (FIG. 10 (b)).

Here, the structure of the flap supply device 6 will be briefly described. As shown in FIGS. 12 and 13, the flap supply device 6 comprises a cloth holding mechanism 25, 25 of the cloth transfer device 3.
Is located on the side of the initial transport position before the movement of the transport path, and the cloth holding table 8 of the flap F, and the cloth holding mechanism 2 from the delivery position for sending out the flap F placed on the cloth placement table 8
5. A suitable flap transport mechanism which is movable between a supply position provided on the side surface of the flap 5 and detachable so as to grip the flap F at the delivery position FP and detach the flap F at the supply position. 39.

Next, the cloth presser mechanism 25 on the cloth transfer mechanism 3,
25 operates to press the ends (sewing allowances) of the flap F and the pocket bag cutting pieces G1, G2 against the both bent ends of the ball cloth E by the cloth pressing members 26, 26. Thereafter, the cloth transfer mechanism 3 moves to the second position side, and during the movement, the sewing machine 2 performs sewing on both folded ends of the ball cloth E. A center knife 14 driven by an operating mechanism (not shown) is provided on the sewing machine bed portion of the sewing machine 2 so as to be able to protrude and retract from the needle plate 13. As shown in FIG. It is cut open with the body cloth W. When the cloth transfer mechanism 3 moves to the second position, the pair of cutting blades of the corner knife mechanism 5 protrude from the sewing machine table surface 1a, and angle-shaped cuts C, C are formed at both ends of the pocket hole H. You.

[0010]

While the body cloth W is moved from the first position to the second position by the cloth transfer mechanism 3 as described above, the ball cloth E, the flap F, and the pocket bag cutting piece G1, G2 is sewn to the body cloth W, a pocket hole H is opened at a predetermined position, and a series of processes for forming angled cuts C, C at both ends of the pocket hole H are performed. In the sewing machine, the body cloth W is accurately set at a predetermined position with respect to the cloth transfer mechanism 3, and then the sewing operation is accurately performed over the entire length of the flap F, and at the same time, the pocket hole H is accurately cut open to open the pocket hole H. Cuts C, C must be formed accurately at both end positions of.

Therefore, conventionally, when placing the flap F on the placement table 8, the operator places the flap F such that the front end or the rear end of the flap F is located at the placement reference point of the placement table 8. Thereafter, the flap F is supplied to the position of the cloth holding mechanisms 25, 25 on the cloth transfer mechanism 3 by the flap transport mechanism 39, and the cloth transfer mechanism 3 is placed in a state where all the cloths to be sewn are overlapped. Operates to convey the body cloth W and the like to a preset sewing start position.

At that time, conventionally, the cloth transfer mechanism 3 always operates once to the transport initial position, and then transports the cloth to a regular sewing start position corresponding to the length of the flap used for sewing. Therefore, for example, when the flap F is short, the tip of the cloth holding mechanisms 25, 25 of the cloth transport mechanism 3 moves far behind the rear end of the flap F. I was There is a problem that the tact time is delayed by the useless operation.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to detect the position of the flap F in the cloth feeding direction at a stage before the sewing operation starts, and The object of the present invention is to provide a bead sewing machine that can improve the working efficiency by adjusting the amount of movement of the cloth holding mechanism of the cloth transfer mechanism according to the position of the sewing machine.

[0014]

According to a first aspect of the present invention, there is provided a bead sewing machine according to the present invention.
A cloth transfer mechanism for holding the flap in an overlaid state on the beaded cloth and moving the superposed cloth from a first position before the sewing needle to a second position after the sewing needle, and disposed near the first position. And a flap supply device for transferring the flaps on the table to the bead cloth held by the cloth transfer mechanism at the first position. A detecting device for detecting a position of the flap placed on the table in the cloth feeding direction; determining the first position based on the detection result; and moving the cloth transfer mechanism to the first position based on the result. And a control device for controlling the driving.

According to the bead sewing machine of the present invention, the position of the end portion of the flap is accurately detected by the detection device on the placement table near the first position, and thereafter, based on the detection result, Since the first position is determined and the cloth transfer mechanism can be immediately moved to the first position, the work time required for sewing can be reduced.

According to a second aspect of the present invention, there is provided a bead sewing machine in which a light projecting device provided with one marking light is reciprocally movable in the cloth feeding direction. And a control device that controls the driving of the transport device based on the detection result of the detection device.

According to the ball stitch sewing machine of the present invention, the light projecting device is moved in the cloth feed direction based on data of the length and the position of the flap detected and calculated by the detecting device.
Since the marking light can be irradiated to the irradiation position, it is possible to prevent a malfunction of sewing due to the cloth setting without relying only on the judgment of the operator in determining the cloth setting position. It will be sure.

Further, in the ball stitch sewing machine according to the third aspect, the flap is held in a state of being overlapped on the ball cloth, and the superposed cloth is moved from the first position before the sewing needle to the second position after the sewing needle. A cloth transfer mechanism for holding the flap on the beaded cloth in a state of being overlapped, and moving the superposed cloth from a first position before the sewing needle to a second position after the sewing needle. A flap dispenser which is disposed near the first position and on which a flap is placed, and which transfers the flaps on the disposable table to the beaded cloth held by the cloth transfer mechanism at the first position. And a storage means for storing position information in the cloth feeding direction of the flap placed on the placement table, and a first position is determined based on the position information. A control device for controlling the cloth transfer mechanism to be driven by Characterized in that it comprises.

Also in the bead sewing machine of the present invention, the position of the end portion of the flap is accurately detected by the detection device on the placement table near the first position, and the position information is stored. The first position is determined based on the detection result, and the cloth transfer mechanism can be immediately moved to the first position, so that the time required for sewing can be reduced.

[Detailed Description of the Invention]

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cloth feeder for a sewing machine according to the present invention will be described below with reference to FIGS.

The bead-stitching sewing machine shown in FIG. 1 is constructed by folding a blanket E in an inverted T-shape on a body cloth W constituting the front body of the garment, and folding one side of the blanket E. The flap and the inner cut piece of the pocket bag are overlapped on the end, and the outer cut piece of the pocket bag is overlapped on the other bent end, and this is moved from the first position across the needle drop point of the sewing machine to the second position. Position, and during the transfer, two parallel sewing machines are sewn from the inside of the folded ends of the ball cloth E to the inside position to cut the body cloth W, the ball cloth E, the flap cloth, and the pocket bag. This is a ball stitch sewing machine in which a pocket hole is cut open between these two stitches at the same time as the pieces are sewn, and an angle-shaped cut is formed at both ends of the pocket hole at the second position.

As shown in FIGS. 1 and 2, this bead-stitching sewing machine includes a sewing machine main body 2 arranged in the middle of a sewing machine table 1, a body cloth W, a ball cloth E, a flap F and a pocket bag cutting piece G1. , G2 from the first position P1 in the BS direction across the needle drop point NP of the sewing machine main body 2 to the second position P2 in the FS direction along the sewing machine table surface 1a, and a first position. In P1, a folding mechanism 4 for folding the ball cloth E in an inverted T-shape with the body cloth W in cooperation with the cloth transfer mechanism 3 to overlap the body cloth W, and the body cloth W and the ball cloth E.
A corner knife mechanism 5 for forming angled cuts C, C at both ends of a pocket hole H cut open at a second position P2, and a flap at one bent end of the blanket E at a first position P1. Flap supply device 6 for supplying F
A first cloth supply device 7a for supplying the inner cut piece G1 of the pocket bag to one of the bent ends of the same ball cloth E;
At the other bent end of the paddle E, the outer cut piece G2 of the pocket bag
And a detecting device 9 provided on the table 8 of the flap supplying device 6 for detecting the position of the flap F in the cloth feeding direction; A marking light mechanism 10 for irradiating a reference position for supplying a point mark attached to the sewing start position to the needle entry point NP and indicating a marking light 55 movable in a cloth feeding direction; And a control device 11 for controlling the sewing machine main body 2 and each of the mechanisms 3, 4, 5, and 10 in accordance with the detected value of the sewing machine and a preset program.

The sewing machine main body 2 has a pair of needle bars 12, 12.
Is a well-known two-needle sewing machine provided with needles 12a, 12a at the lower end of the sewing machine. The sewing machine has two needles 12a, 12a which cooperate with two needles 12a, 12a penetrating through the needle holes of the needle plate 13. A shuttle mechanism for creating seams parallel to each other and a bobbin thread cutting mechanism for cutting a bobbin thread connected to the body cloth W and the shuttle after the formation of the stitches are arranged. Is provided with a slit parallel to the cloth transfer direction. In this slit, a center knife 14 of a center knife mechanism arranged in the sewing machine bed portion is arranged so as to be able to protrude and retract.

The cloth transfer mechanism 3 is provided with a moving block 15 disposed in a notch formed along a cloth transfer path at a portion of the sewing machine table surface 1a behind the sewing machine main body 2.
And a base end 16b at the upper end of the moving block 15.
And a pair of left and right rotating arms 16, 16, which are pivotally mounted and supported so as to be movable in the vertical direction, and whose tip portion 16 a is provided to extend in the cloth feeding direction.

The moving block 15 is supported by a guide rod 17 provided along the lower surface of the sewing machine table 1 so as to be movable in the cloth feeding direction by being inserted through a central through hole 18. Then, the entire cloth transfer mechanism 3 can be moved in the cloth feed direction by rotating the screw shaft 20 inserted and screwed into the screw hole 19 of the moving block 15 forward and backward by the servo motor 21. Both rotating arms 16,
16 is urged upward by coil springs 23 and 23 and is normally lifted to a position where it abuts a stopper member 22 fixed to the upper end on both sides of the moving block 15. Then, the cylinder 22a attached to the stopper member 22 is extended, and the rotary arms 16, 16 are pressed down against the urging force of the coil springs 23, 23, so that the presser plates 24, 24 at the lower end portions of the cylinder table allow the sewing machine table to be pressed. The body cloth W on the surface 1a can be narrowed.

At the upper ends of the two rotating arms 16, 16, there are provided cloth holding mechanisms 25, 25 for holding the ball cloth E from both sides and bending the cloth E into an inverted T-shape. The cloth holding mechanisms 25, 25 are provided with a pair of edge holding members 26, 26 provided on the rotating arms 16, 16 so as to be rotatable about an axis parallel to the cloth transfer direction. The edge pressing members 26, 26 are constantly urged in the upright direction by an urging device (not shown). Then, by extending the cylinders 27, 27 attached to the outer portions of the rotating arms 16, 16, and pressing down the edge pressing members 26, 26, the horizontal portions 26a, 26a at the tips of the edge pressing members 26, 26 are balls. Cloth E
Abutment E and flap F
And the pocket bag cutting pieces G1 and G2 can be pressed together.

The folding mechanism 4 includes a lifting / lowering / rotating mechanism 52 provided on a column 28 erected on the front side of the sewing machine main body 2 so as to avoid the moving path of the cloth transfer mechanism 3, Inverted T-shaped web 2 supported and moved by mechanism 52
9 and a table 30 for placing the ball cloth E constitute a main part. A plurality of stabbing needles 31 are inserted into the web 29 through through holes formed in the presser foot 29a.
A cloth holding mechanism 32 is provided to protrude from the lower surface of a and hold the cloth. Then, the web 29 is moved onto the cloth table 30 at the first position P1 by driving the elevating / rotating mechanism 52, and the cloth is held in a state where the cloth presser 29a is brought into contact with the ball cloth E on the cloth table 30. By actuating the holding mechanism 32, the blanket E is held by the plurality of stabbing needles 31 protruding from the lower surface of the cloth presser 29a, and the web 29 is moved in this state to wait for the cloth transfer mechanism 3 at the first position. A pair of holding plates 24,
The seat E is transported to a predetermined position of the body cloth W by being seated between the sheets 24, and is overlapped.

The corner knife mechanism 5 includes a pair of corner knifes 33a, 33b each having an angled (>, <) blade shape as viewed from the knife axis direction, and the corner knifes 33a, 33b.
The sewing machine is provided with a fixed frame 34a and a movable frame 34b for holding the frame 33b up and down with the cutting edge facing upward, and keeping the angle portions facing each other in the cloth transfer direction, and the corner knives 33a and 33b. A knife driving cylinder 36 for projecting and retracting on the sewing machine table surface 1a from a notch 35 formed at the second position P2 of the table 1 along the cloth transfer direction, and an interval between the corner knives 33a and 33b. And a knife spacing adjusting cylinder 37. The scalpel drive cylinder 36 is mounted vertically on the fixed frame 34a, and its piston rod 39 is
The two corner knives 33a and 33b are connected to a scalpel driver 38 that connects the scalpels to each other. Female drive 3
8 has a guide hole 38a formed in the horizontal direction over substantially the entire length thereof, and a fixing hole 38b formed beside the guide hole 38a, and the guide hole 38a has a female shaft of one of the corner knives 33a. An engaging pin protruding in the middle is movably engaged along the guide hole 38a, and an engaging pin protruding in the middle of the female shaft of the other corner knife 33b is fixed in the fixing hole 38b. . Cylinder spacing adjustment cylinder 3
7 is attached to the lower surface of the sewing machine table 1 so that the cylinder axis direction matches the cloth feeding direction, and its piston rod 37a is connected to the moving frame 34b. The corner knife mechanism 5 can freely adjust the distance between the two corner knives 33a and 33b by extending and retracting the knife gap adjusting cylinder 37. After the adjustment, the knife driving cylinder 3 is extended to drive the knife. By moving the body 38 upward, the two corner knifes 33a, 3
3b is simultaneously projected on the sewing machine table surface 1a, so that angled cuts C, C can be instantaneously formed at both ends of the pocket hole H cut out in the body cloth W and the ball cloth E.

Further, as shown in FIGS. 3 and 4, the flap supply device 6 comprises a table 8 on which the flap F is placed.
And a mounting table 8 that extends in the same direction as the longitudinal direction of the flap F at the tip of a rotating arm 45 that rotates about a rotating shaft 45a.
A flap presser 44 for holding the flap F between the flap F and a flap transport mechanism 39 including a pair of gripping members 39a and 39b for gripping the upper end of the flap F and transferring the flap F to the bent end of the blanket E. Further, a detection device 9 for detecting the position of the flap F in the cloth feeding direction is provided. Here, the flap retainer 44 is driven by a flap retainer drive mechanism (not shown) via a rotating arm 45, so as to clamp and open the flap F.

The detecting device 9 is, specifically, a reflecting plate 42 attached to the lower surface of the flap holder 44 and a slot extending from a portion of the placement table 8 facing the reflecting plate 42. An LED 48 for irradiating light toward the reflection plate via an optical window 46, and a light reflected from the reflection plate 42
6 and a light receiving sensor 49 that receives light through the light receiving element 6. Note that the LED 48 and the light receiving sensor 49 are fixed to a box-shaped moving body 43 having an optical window 47 formed thereon, through which irradiation light and reflected light can pass.
Can be moved along the extending direction of.

FIG. 5 is a perspective view showing the structure of the transfer device 65 of the moving body 43 of the detection device 9. The optical window 46
The pulley 66 in the FS direction is connected to the drive shaft of the pulse motor 70, while the pulley 66 in the BS direction is attached to the mounting table 8. It is rotatably supported on the lower surface. Note that the pulse motor 70 is fixed to the lower surface of the placement table 8 via a mounting stay (not shown).

A conveyor belt 67 is wound between the pair of pulleys 66, 66, and the outer frame of the moving body 43 is fixed to a part of the conveyor belt 67, thereby driving the pulse motor 70. By doing so, the moving body 43 can be moved along the extending direction of the optical window 46 via the pulleys 66, 66 and the conveyor belt 67. In the present embodiment, the reference position (origin) of the moving body 43 is the end of the movable range in the FS direction. That is, an origin sensor 65a is provided near the FS direction end of the movable range of the moving body 43, and an origin detecting plate 65b sensed by the origin sensor 65a is provided on the outer frame of the moving body 43.

As shown in FIG. 2, the first cloth supply device 7a is provided above the left side of the first position P1 so as to place the inner cut piece G1 of the pocket bag on the flap F. A pair of gripping members 51a, 51 for gripping the upper end of the cloth cutting table 50a and the inner cut piece G1 of the pocket bag placed on the cloth mounting table 50a and transferring it to the bent end of the blanket E.
and a cloth transfer mechanism 51 made of b.
The second cloth supply device 7b includes a cloth table 50b provided on the upper right side of the first position P1 for mounting the outer cut piece G2 of the pocket bag, and a pocket bag mounted on the cloth table 50b. And a cloth transfer mechanism 53 comprising a pair of gripping members 53a and 53b for gripping the upper end of the outer cut piece G2 and transferring the same to the bent end of the ball cloth E. The cloth transfer mechanism 5 of the first and second cloth supply devices 7a, 7b
1, 53 are driven by a drive mechanism (not shown).

On the upstream side of the body cloth W in the cloth feeding direction with respect to the needle drop point NP on the sewing machine table 1,
A marking light mechanism 10 having one marking light 55 is provided.

As shown in FIG. 6, the marking light mechanism 10 has a transport mechanism 57 for transporting the light projecting device 56 supporting the one marking light 55 reciprocally in the cloth feeding direction, and inputs sewing data. Operation unit 58 for performing
And controlling the driving of the transport mechanism 57 based on the irradiation position data prepared for each sewing data or the data of the position and length of the flap detected by the detection device 9 to adjust the lighting position of the marking light 55. And a control device for performing control. In this embodiment, the transport mechanism 57 includes a transport belt 61 wound around a pair of pulleys 60 and a pulse motor P as a driving device for the pulleys.
M, and the control device includes a sewing machine main body 2
Is used.

Although not shown, an origin detection plate and an origin sensor are provided similarly to the above-described transport mechanism 63 of the moving body 43, and the origin sensor is provided at the end of the marking light 55 in the FS direction in the moving range. Have.

The control device 11 of this embodiment includes:
The detection signal of the detection device 9 and the operation signal of the operation pedal 63 provided near the floor of the sewing machine table 1 are input. When an operation signal is given by several steps of the operation of the operation pedal 63, the control device 11 operates the flap press drive mechanism and the detection device 9 to detect the length and position of the flap F, and the cloth transfer mechanism 3
The control signal is sent to the controller of the sewing machine to control the driving amount of the cloth transfer mechanism 3 by calculating the initial operation reference position of the cloth presser mechanism 25, and the body cloth W
The upper sewing start position and the upper sewing end position are calculated, and based on the calculation results, a control signal is supplied to a control device of the sewing machine to perform a predetermined number of stitches. The sewing machine control signal is supplied to each of the cloth transfer device 3 and the control device of the corner knife mechanism 5 as a cloth transfer control signal and a knife interval control signal. The control device 11 of the sewing machine main body 2 also controls the center knife mechanism and the marking light mechanism 10. FIG. 7 shows a configuration diagram of an electrical connection to the control device 11 in the present embodiment.

Next, with reference to the flow of FIG. 8, the operation of the sewing machine flap F constructed as described above in the sewing of the flap F will be described. In particular, the operations of the detection device, the marking light mechanism 10 and the cloth transfer mechanism 3 will be described. This will be mainly described.

First, when the operator turns on the flap supply device, the detection device 9 of the flap supply device 6 is turned on.
Move to the reference position (origin) at the time of its driving, and the cloth transfer mechanism moves to the rearmost position (origin) in the FS direction (step ST1). In addition,
In the present embodiment, the reference position is the forefront of the placement table 8 on which the front end of the flap F is to be placed.

Next, data relating to the sewing of the flap F is input (step ST2). For example, depending on whether the body cloth W is on the left or right side, if the setting position of the marking point MP attached to the body cloth before the start of sewing is different in the front and rear in the cloth feeding direction, the worker is positioned on the near side. Data indicating whether the marking point MP should be aligned (front reference) or conversely, whether the marking point MP should be aligned on the back side for the operator (rear reference).

Subsequently, after the worker places the body cloth W at the first position P1 on the sewing machine table 1, the operator sets the flap F on the cloth table 8 of the first cloth supply device 7a (step S).
T3) Depress the operation pedal 63 and set the first-stage switch to O.
When N is set (step ST4), the flap press drive mechanism operates, the rotating arm 45 falls, and the flap press 44 of the detection device 40 is pressed against the flap F, and the flap F is held on the cloth table 8. (Step ST5). If the first-stage switch of the operation pedal 63 remains OFF, a data input step (step S
It is possible to start over from T2) (Step ST)
4).

When the flap presser 44 is lowered, the moving body 43 is moved by the transfer device 65 (step ST6).

Then, the light receiving sensor 49 of the moving body 43 starts to receive the light projected from the LED 48 via the reflecting plate 42, and when the light is no longer received, that is, the flap F
When the sensor 49 changes from the OFF state to the ON state by blocking between the reflection plate 42 and the reflection plate 42 (step ST7), the number of pulses at that time (the number of pulses from the reference position of the pulse motor 70) to the front end position from the detection device origin A distance d1 (see FIG. 9) to the flap F is obtained and recorded in the control device 11 as front end position data of the flap F (step ST8).

Further, the moving body 43 is moved (step ST9), and the light receiving sensor 49 is turned on by the LED 4 via the reflection plate 2.
8, when the LED 48 and the reflector 4
Flap F disappears from the point between 2 and sensor 49 turns ON
From the state to the OFF state (step ST10),
From the number of pulses at that time (the number of pulses from the reference position of the pulse motor 70) to the distance d from the origin of the detection position to the rear end position
2 (see FIG. 9), and this is recorded in the control device 11 as rear end position data of the flap F (step ST).
11).

Subsequently, the next operation is selected by depressing the operation pedal 63 (step ST12). That is, when the detection of the front and rear ends of the flap is not successful, for example, the first stage switch is turned off and reset (step ST13), and the operation of searching for the origin of the moving body 43 (step ST1) is performed again. Start over. In order to proceed to the next stage, the second stage switch is turned ON by depressing the operation pedal 63. If the second-stage switch of the operation pedal 63 remains OFF, the standby state is maintained (step ST12).

Here, it is determined from the sewing data of the control device 11 whether the sewing reference of the flap F is the front reference or the rear reference (step ST14). That is, in the present embodiment, as shown in FIG. 9, the origin position of the marking light mechanism 10 and the origin position of the detection device 9 are configured to be constant. In the case of the front reference, the front reference position and the flap F In the case of the front end position and the rear reference, the rear reference position and the rear end position of the flap F are set to be the same, so that the marking light 55 is moved by the distance d1 from the marking light origin position (step ST15). ). If it is the rear reference, the marking light 55 is moved to the rear end data position, that is, the distance d2 from the marking light origin position (step ST16) (see FIG. 9).

Next, the cloth transfer mechanism 3 is controlled by the controller 11.
The pressing mechanism 25 is advanced to the first position P1 by an appropriate transport amount in consideration of the mounting position of the flap F (step ST17). Hereinafter, a method of calculating the carry amount will be described.

As shown in FIG. 9, the position where the cloth transfer mechanism 3 has retreated most in the FS direction is the standby position, and the flap F
If the rear end position is located closest to the BS direction normally held by the cloth transfer mechanism 3 as the placement limit position, the cloth transfer mechanism 3 is moved from the standby position to the placement limit position. The amount of movement to a position coinciding with the rear end position of the flap on the top 8 is the conveyance amount. That is, the carry amount D1 is given by D1 = X1 + d2. Here, x1 is a fixed value that is the distance from the placement limit position when the cloth transfer mechanism 3 is at the standby position to the detection device origin, and is stored in the control device 11 in advance, and d2 is the step ST11. Is sought. Therefore, by moving the cloth transfer mechanism 3 at the last retracted position by the carry amount D1 in the BS direction, the placement limit position can be moved to the first position P1 that matches the flap rear end position.

As described above, in the present invention, the placement limit position of the cloth transfer mechanism 3 is set based on the rear end position data of the flap F detected in advance by the detection device 9 provided in the flap supply device 6. Since the drive is performed so as to coincide with the rear end position of the flap on the base 8, the moving amount of the cloth transfer mechanism 3 can be minimized, so that the moving distance can be shortened and the working efficiency can be improved. In the present embodiment, the movement amount of the cloth transfer machine side 3 is minimized. However, the movement amount of the cloth transfer mechanism 3 does not necessarily have to be minimized, that is, the movement amount of the cloth transfer mechanism 3 depends on the mounting position of the flap F. It is only necessary to make a change to shorten the travel time.

Subsequently, the body W is set in accordance with the irradiation position of the marking light 55 (step ST1).
8).

Then, the operation pedal 63 is depressed and the next operation is selected (step ST19). That is, when the cloth transport mechanism is moved forward or the irradiation position of the marking light 55 has an error, the second-stage switch is turned off, and the second-stage switch is turned on again by depressing the operation pedal 63. (Step ST12). Also, when proceeding to the next stage,
Further depress the operation pedal 63 to turn on the third stage switch
To When the operation pedal 63 is set to the O
If the state is still N, the process waits in a state of waiting for the setting of the body cloth W.

Next, the flap supplying device 6 is operated to supply the flap F onto the body cloth W (step ST).
20). In detail, the worker has the inside cut piece G of the pocket bag.
1 is set on the table 50a of the first cloth supply device 7a, and the outer cut piece G2 of the pocket bag is set on the table 50b of the second cloth supply device 7b.
Set the ball cloth E to 0, and first, the cloth transfer mechanism 3
Of the body cloth W is narrowed on the sewing machine table surface 1a by the action of the rotating arms 16, 16, and the folding mechanism 4 is driven to overlap the blanket E on the body cloth W. The flap F is supplied by driving the apparatus, and then the cloth transfer mechanisms 40 and 42 of the first and second cloth supply devices 7a are operated to set the flap F and the pocket at one bent end of the ball cloth E. The inner cut piece G1 of the bag is set, and the outer cut piece G2 of the pocket bag is set at the other bent end. Next, the control device 11 operates the cloth pressing mechanisms 25, 25 of the cloth transfer mechanism 3, and the horizontal portions 26a, 26a of the edge pressing members 26, 26 from both sides allow the blanket E, the flap F,
Then, the pocket bag cutting pieces G1 and G2 are pressed down from both sides and fixed (step ST21), a cloth transfer control signal is given to the cloth transfer mechanism 3, and the cloth transfer mechanism 3 moves according to the cloth transfer control signal, and The W, the blanket E, the flap F, and the pocket bag cutting pieces G1 and G2 are transferred to the second position P2.

During the transfer, the sewing machine main body 2 is driven in accordance with the sewing machine control signal, and the sewing machine 2
The parallel sewing of the sewing machine is performed to meet the body cloth W, the ball cloth E, the flap cloth F, and the pocket bag cutting pieces G1 and G2, and at the same time, the center knife mechanism is driven to form a pocket hole between the two seams. Cut open. Also at the second position, the corner knife mechanism 5 is driven in accordance with the knife interval control signal to form angled cuts C, C at both ends of the pocket hole H (step ST22). The cloth transfer mechanism 3 moves again when the corner knife mechanism 5 finishes the cutting operation, and
After transferring the body cloth W subjected to the series of processes to the first position P1, the narrow pressure of the body cloth W by the presser plates 24, 24 is released, and at the same time, both sides of the ball cloth E by the cloth presser mechanisms 25, 25 are released. Release the presser to complete the sewing operation.

Here, a method of determining the position where sewing of the flap F is started in step ST22 will be described with reference to FIG. If the sewing start position is the front end position of the flap F, sewing may be started when the front end position of the flap F coincides with the sewing position (needle drop point NP). Therefore, the carry amount D2 is calculated by D2 = dl + X2. You. Here, X2 is a fixed value that is the distance between the origin of the detection device and the sewing position, is stored in the control device 11 in advance, and dl is obtained in step ST8. Thus, the cloth transfer mechanism 3 at the first position P1 is moved by the carry amount D2 in the FS direction, and sewing is started there.

As described above, in the present invention, when the front end position of the flap F coincides with the sewing position based on the front end position data of the flap detected in advance by the detection device 9 provided in the flap supply device 6, , The sewing can be accurately started from the front end position of the flap F. In the present embodiment,
The sewing is started from the front end position of the flap F, but it is not always necessary to start from the front end position. In other words, the sewing is started accurately from a desired position based on the front end position data of the flap detected in advance. I just want to be able.

Further, a method of determining the position where the stitching of the flap F is finished in step ST22 will be described with reference to FIG. If the sewing end position is the rear end position of the flap F, the sewing may be ended when the rear end position of the flap F matches the sewing position (needle drop point NP).
The carry amount D3 is calculated by D3 = d2-dl. Here, dl and d2 are obtained in steps ST8 and ST11, respectively. Therefore, the cloth transfer mechanism 3 is moved by the carry amount D3 in the FS direction from the position where the above-mentioned front end position of the flap is at the sewing position, and then the sewing is completed.

As described above, in the present invention, the rear end position of the flap F coincides with the sewing position based on the rear end position data of the flap F detected in advance by the detection device 9 provided in the flap supply device 6. Since the sewing machine is driven so as to end the sewing when the sewing is performed, the sewing can be accurately finished at the rear end position of the flap F. In the present embodiment,
Although the sewing is terminated at the rear end position of the flap F, it is not always necessary to end the sewing at the rear end position. In short, the sewing can be accurately performed at a desired placement based on the rear end position data of the flap F detected in advance. It suffices if sewing can be completed.

As described above, the sewing machine according to the present embodiment detects the length and the position of the flap F on the work table 8 and controls the sewing machine main body 2 including the center knife mechanism by the control device 11 based on the detected values. Since the transfer mechanism 3 and the corner knife mechanism 5 are controlled, the above-described series of steps can be accurately executed according to the length of the flap.

The present invention is not limited to the above embodiment. For example, as the detection device 11, these first
And a slit-shaped optical window is formed on each of the opposing surfaces of the second detector and an LED array including a large number of light-emitting diodes (LEDs) inside the first detector. A line sensor composed of a large number of CCD elements arranged in a straight line is provided at an inner wall position facing the optical window, and a light receiving surface of the line sensor is provided inside the second detector. May be provided with a condenser lens. Further, in the above-described embodiment, the marking light mechanism is also controlled based on the detection result of the detection device of the flap supply device. However, the arrangement of the marking light mechanism is not essential, and The control of the light mechanism can also be independent control.

Further, instead of directly calculating the carry amount D1 of the cloth transfer mechanism 3 to the first position P1 from the rear end position of the flap F, for example, the length data of the flap F to be sewn to the controller 11 is previously calculated. The cloth transfer mechanism 3 is stored and added to the length data and the detected front end position data.
The transport amount D1 to the first position P1 may be calculated. That is, on condition that the cloth transfer mechanism 3 securely holds the flap F, when the flap F is at a position close to the cloth transfer mechanism 3, the moving amount of the cloth transfer mechanism 3 is shortened,
When the cloth transfer mechanism 3 is at a distant position, the amount of movement of the cloth transfer mechanism 3 is increased, and as the position of the flap F on the cloth table 8 in the cloth feed direction approaches the cloth transfer mechanism, the amount of movement of the cloth transfer mechanism 3 is reduced. If the moving time can be shortened, either the rear end position data of the flap F or the front end attached data may be used.

If the length data of the flap F is stored in advance in the control device 11, if the rear end position of the transport amount D2 can be detected in the same manner as the above described transport amount D1, the rear end position data and the length data are converted. Can be calculated by adding
If the front end position can be detected, the carry amount D3 can also be calculated by adding the front end position data and the length data.

Further, the second embodiment of the present invention relates to a ball stitch sewing machine in which the flap F is placed at a predetermined reference position on the placement table 8 based on the front reference and the rear reference as in the prior art. The movement amount of the cloth transfer mechanism 3 is to be shortened according to the position in the feeding direction.

The difference from the previous embodiment is that the hardware configuration does not include a detection device, and that the vicinity of the end of the placement table 8 in the BS direction and the vicinity of the end in the FS direction are respectively set. The point where the line as the back reference and the before reference is described,
This is a point that the marking light for the front reference and the marking light for the rear reference are fixedly provided according to the front reference and the rear reference. In the software configuration, the length information of the flap F is provided. Note that the front reference line and the rear reference line may be formed by protrusions such that the ends of the flap F abut.

Here, the conventional apparatus will be described. In the case where the conventional apparatus is the front reference, the flap F is placed so that the front end coincides with the front reference line of the placement table 8, and the front reference marking is provided. The bead stitch sewing machine is started by moving the cloth transfer mechanism 3 forward by setting the body and the body to the position with the marking of the light, and in the case of the rear reference, the rear end of the flap F It is placed so as to coincide with the rear reference line, and the body is set to the marking position of the rear reference marking light, the bead sewing machine is started, and the cloth transfer mechanism 3 is advanced. I have.

In this embodiment, the transport amount of the cloth transfer mechanism 3 in the case of the rear reference is constant because the rear end placement of the flap F does not change. In this case, the cloth transfer mechanism 3 is in the standby position. From the position to the position where the mounting limit position coincides with the rear reference line. This transport amount is determined in advance by the controller 1
1 and the cloth transfer mechanism 3 is controlled based on this information amount when the reference is a post-reference.

Further, the transport amount of the cloth transfer mechanism 3 when the cloth transfer mechanism 3 is the front reference changes the length of the rear end position of the flap F depending on the length of the flap F. The moving amount is a distance obtained by adding the length of the flap F to the moving amount until the front reference line is matched. The movement amount up to the front reference line and the length of the flap F are stored in the control device 11 in advance, and when the movement is the front reference, the conveyance amount obtained by adding the movement amount up to the front reference line and the length of the flap F is added. The cloth transfer mechanism 3 is controlled to move forward by an amount.

Thus, at least in the case of the forward reference, the moving amount of the cloth transfer mechanism 3 can be shortened as the flap F becomes shorter, and the moving time of the cloth transfer mechanism 3 can be shortened. It should be noted that a detection device is provided so as to detect the rear end position of the flap F, and the above effect can be obtained in the case of the front reference.

[0069]

As described above, according to the bead sewing machine according to the present invention, the length of the flap is reliably detected at the stage before the sewing operation is started, and the body transfer mechanism moves the body cloth to the first position. In setting the position, the length of the flap and the positions of the front and rear ends are accurately detected by the detection device on the placement table near the first position, and then the first position is determined based on the detection result. Since the cloth transfer mechanism can be immediately moved to the first position, the work time for sewing can be reduced, and the work efficiency can be improved. In addition, since the second detection body also has a function of pressing the flap against the cloth table, the position of the flap can be prevented, and the second detection body can be closely attached to the flap to accurately detect the flap length.

If the marking light mechanism is driven based on the detection result of the detecting device, the light projecting device is moved in the cloth feeding direction based on the calculated data of the length and the position of the flap. Since the marking light can be irradiated to the irradiation position, it is possible to prevent a malfunction of sewing due to the cloth setting without relying only on the judgment of the operator in determining the cloth setting position. It will be sure.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a bead sewing machine.

FIG. 2 is a front view showing the operation of the main part of the bead sewing machine shown in FIG. 1;

FIG. 3 is a side view showing a configuration of a flap supplying device of the bead sewing machine shown in FIG. 1;

FIG. 4 is a side view showing a configuration of a main part of the flap supply device of FIG. 3;

FIG. 5 is a perspective view showing a configuration of a moving device transport device of the detection device of the present embodiment.

FIG. 6 is a perspective view showing a configuration of a marking light device of the bead sewing machine shown in FIG. 1;

FIG. 7 is a configuration diagram illustrating an electrical connection to a control device according to the present embodiment.

FIG. 8 is a flowchart focusing on the operations of the detection device, the marking light mechanism, and the cloth transfer mechanism in sewing the flap of the bead stitch sewing machine according to the present embodiment.

FIG. 9 is an explanatory diagram showing a movement amount of the cloth transfer mechanism.

FIG. 10 is an explanatory view showing a general manufacturing process of a pocket with a flap.

FIG. 11 is a perspective view of the suture body in the step of FIG.

FIG. 12 is a front view showing a state of one step of bead sewing by a conventional bead sewing machine.

13 is a front view showing the state of one step after the step shown in FIG. 12;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewing machine table 1a Table surface 2 Sewing machine main body 3 Cloth transfer mechanism 4 Folding mechanism 5 Corner knife mechanism 6 Flap supply device 7 Cloth supply device 7a First supply device 7b Second supply device 8 Cloth table 9 Detection device 10 Marking light mechanism 11 Control device 29 Web 29a Cloth presser 39 Flap drive mechanism 39a Gripping mechanism 42 Reflector 43 Moving body 44 Flap press 45 Rotating arm 46 Optical window 47 Optical window 48 LED sensor 49 Line sensor 55 Marking light 56 Light emitting device 57 Transport mechanism 58 Operation section 60 Pulley 61 Belt 63 Operation pedal W Body cloth E Blanket F Flap G1 Pocket bag outer cut piece G2 Pocket bag outer cut piece H Pocket hole C Cut

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masahiko Tanaka 8-2-1 Kokuryo-cho, Chofu-shi, Tokyo F-term in Juke Corporation (reference) 3B150 AA25 CC02 CE23 CE27 GD04 GD08 GH01 LA36 LB01 NA27 NB09 QA06 QA07

Claims (3)

[Claims] 1. A cloth transfer mechanism for holding a flap in a state of being overlapped on a bead cloth and moving the superposed cloth from a first position before a sewing needle to a second position after a sewing needle; And a flap supply device for transferring the flaps on the placement table to the beaded cloth held by the cloth transfer mechanism at the first position. In the edge stitch sewing machine, a detection device that detects a position of a flap placed on the cloth table in a cloth feeding direction, and a cloth transfer mechanism that determines the first position based on the detection result and based on the result. And a control device for controlling the drive to the first position. 2. A transport device for transporting a light projecting device provided with one marking light reciprocally in a cloth feeding direction,
The sewing machine according to claim 1, further comprising a marking light device including a control device that determines an irradiation position based on a detection result of the detection device and controls driving of the transport device. 3. A cloth transfer mechanism for holding the flap in a state of being overlapped on a bead cloth and moving the superposed cloth from a first position before the sewing needle to a second position after the sewing needle; And a flap supply device for transferring the flaps on the placement table to the beaded cloth held by the cloth transfer mechanism at the first position. In the edge stitch sewing machine, storage means for storing position information of a flap placed on the cloth table in a cloth feeding direction; a first position determined based on the position information; and a cloth transfer mechanism based on the determination. And a control device for controlling to drive the sewing machine.