JPH03149086A - Stacker and surging device using same - Google Patents

Abstract

PURPOSE:To cope with the high speed operation of a sewing device by providing a clamp releasing means for unlocking a clamp on a conveyor circulation passage, and a plurality of cloth hooking bars capable of advancing, retreating and vertically moving in a direction orthogonal with a cloth advance direction under the conveyor circulation passage. CONSTITUTION:A stacker 33 has a belt conveyor 37 driven with a stepping motor 36. The belt conveyor 37 is fitted with clamp mechanisms 38A to 38C and these mechanisms 38A to 38C circulate together with the conveyor 37. Cloth hooking bars 57A and 57B advance and retreat in a direction orthogonal with a cloth feed direction under the circulation passage of the clamp mechanisms 38A to 38C. The bars 57A and 57B when projected support cloth, while releasing the cloth when made to retreat. When the cloth hooking bar 57A projects ana comes down with cloth w, hooked thereto, the cloth hooking bar 58B moves up as retreated. Then, the bar 57B projects and the next cloth W2 is hooked thereto. Also, the bar 57A retreats and the cloth W1 hooked thereto is released. When the bar 57A as retreated moves up, the bar 57B supporting the cloth W2 comes down. It is possible, therefore, to cope with the high speed operation of a sewing device by causing the advance, retreat and vertical motion of the cloth hooking bars as aforementioned.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high-speed stacker that clamps cloth delivered from a sewing device, transports it to a cloth holding table, releases the clamp there, and stacks it on the cloth holding table; This invention relates to a high-speed surging device using a stacker.

BACKGROUND OF THE INVENTION Stackers for stacking fabrics delivered from prior art sewing machines on fabric holders are known and come in various types. One of these, as shown in U.S. Pat. No. 3,126,848, consists of a chain that is passed between the sprockets, a lamp that can be opened and closed and that is attached to the chain and circulates with the chain, and a clamp that allows the chain to engage the sprockets. When the two sprockets reach the other sprocket, it opens to accept the cloth sent out from the sewing device, and when the clamp becomes horizontal, it clamps this cloth and carries it to the table, and when it reaches the other sprocket, it opens. It is well known that they are stacked on a table.

A serging device is one of the sewing devices in which such a stacker is used. This serging device is usually used in the process of applying V-seams to the edges of cut cloth, such as pants body material, to prevent fraying, and is generally used with a table and an overlock sewing machine installed on the table. Then, the fabric guide is installed on the table in front of the presser foot of the sewing machine, and the fabric guide uses a sensor to detect the leading edge of the fabric fed from the front side of the table, starts sewing, and prevents the fabric from becoming tangled. The presser foot is designed to guide the edge of the fabric to the foot of the presser foot while the fabric is being sewn all at once by hem stitching until the edge of the fabric is reached.

Problems to be Solved by the Invention In the conventional stacker mentioned above, the clamp can only be opened and closed when it is engaged with the sprocket, and the sewn product cannot be released at any position between the sprockets, so the scope of application is limited. is now limited to a certain length. In other words, it cannot be applied to items that are longer than the distance between the sprocket axes, and even if it is short, when one end of the sewn product is clamped and moved, the other end will hang down and move in a dragging state. , they tend not to stack properly.

In the above-mentioned stacker, the degree of opening of the clamp changes depending on the diameter of the sprocket, and if the sprocket has a large diameter, the clamp will not open as much, and when releasing the sewn product, it may be difficult to slide off, especially if it is a thick product. Furthermore, when clamping, the clamping and release of sewn products tends to be unreliable depending on the type and properties of the sewn product, such as thick or thin and flexible materials that may fail to fit in.

In order to solve the above problem, the present applicant first filed a patent application in 1983.
- In No. 177864, a conveyor that is driven in circulation, a support stand attached to the conveyor, a clamp that is attached to the support stand in an openable and closable manner and constantly opens by the action of a spring, and a clamp that is always opened by a certain amount in conjunction with the closing operation of the clamp. a clamping mechanism having a launch lever that operates and locks the clamp in a closed state and circulating together with the conveyor; a device for pushing the clamp against the action of a spring; and an arbitrary position on the circulation path of the clamping mechanism. We proposed a stacker consisting of a regulating rod that is installed in the parking lot, engages the launch lever, releases the lock, and releases the clamp.

A first object of the present invention is to improve the stacker described above and provide a stacker that can cope with increased speeds of sewing machines.

A second object of the present invention is to provide a high-speed surging device using the improved stacker described above.

Means for solving the problem and operation A stacker for achieving the first objective includes a conveyor that is driven in circulation, and is attached to the conveyor at regular intervals,
a plurality of clamps biased in the opening direction by springs;
A closing means for closing the clamp, a locking means for locking the clamp in the closed state, a clamp opening means for unlocking the clamp at a preset arbitrary position on the circulation path of the conveyor, and a clamp opening means for unlocking the clamp at a preset arbitrary position on the circulation path of the conveyor. A plurality of cloth hooks provided below so as to be movable forward and backward and up and down in a direction orthogonal to the cloth traveling direction are made of rods.

According to the stacker of the present invention, regardless of the size of the pulley or sprocket, the clamp is opened by a fixed amount, and the fabric fed from the sewing device enters the clamp which is opened by a fixed amount. The fabric entering the clamp is clamped when the clamp moves with the conveyor and is locked by engaging and closing the closing means. As the clamping mechanism continues to move and reaches the release means, the locking means engages and releases the lock. This causes the clamp to open a certain amount, releasing the clamped fabric.

The release of the fabric is carried out by a release means as described above,
The position of the release means is adjustable. Therefore, by adjusting the position of the release means in the direction of movement of the clamp mechanism, the cloth can be released at any desired position.

By installing multiple or a large number of clamping mechanisms on the conveyor at regular intervals, the fabric delivered from the sewing device is clamped one after another, transported to a fabric support placed at a predetermined position, and released, thereby increasing speed. be done.

Each of the rods for multiple cloth hooks sequentially descends from the protruding upper position and then repeats the retracting operation. Therefore, the cloth sent out from the sewing device always has the highest protruding cloth hook attached to the rod. , supported. This prevents the cloth held at one end by the clamp from sagging and from coming into contact with or overlapping the preceding cloth. The release of the cloth takes place when the rod lowers and retracts the cloth.

After descending, the rod of the cloth hanger rises and protrudes, but in order to ensure the support of the cloth, it is desirable that the timing of the protrusion be as early as possible, and that it protrude midway through the ascent. A protruding cloth hanger with a rod that descends must be careful not to push up the cloth supported by the rod.
To ensure this, the pair of cloth hooks should be placed in parallel so that the rods can be moved forward and backward and up and down interchangeably with each other, and one cloth hook will be attached to the other cloth when the rod is retracted in the lower position to release the cloth. Preferably, the hook is configured such that the rod protrudes in the upper position.

For cloth hanging, the rod can always move up and down and move forward and backward at a constant cycle, but it is better to synchronize the movement of the clamp with the timing and use a sensor to detect when the clamp reaches a predetermined position and activate it. desirable.

A high-speed surging device for achieving the second purpose includes a table, an overlock sewing machine installed on the table, and a stacker connected to the table and having the above structure for stacking fabric fed from the sewing machine on a fabric holding table. , a fabric guide installed on the fabric feeding side in front of the presser foot to guide the edge of the fabric, and a fabric guide installed on the fabric feeding side behind the presser foot so that it can be raised and lowered.
An auxiliary cloth feeder that sends out the cloth, a first fabric sensor that is installed on the cloth feeding side in front of the presser foot and that detects the edge of the cloth and controls the raising and lowering of the auxiliary cloth feeder, and a first fabric sensor that is installed behind the presser foot that detects the edge of the cloth. and a second fabric sensor that detects and controls the clamping mechanism constituting the stacker.

According to this device, the fabric is fed through the fabric guide, and after the first fabric sensor detects the tip, the auxiliary fabric feeder descends, feeds the fabric fed from the presser foot, and shifts the fabric in the lateral direction. Send it straight towards the stacker to avoid
After the second fabric sensor detects the tip of the fabric fed out from the presser foot, the clamp is closed by the closing means, and the edge of the fabric fed into the clamp is clamped. The cloth hanger uses a rod to support the cloth, which is pulled by a clamp that moves with the conveyor, to prevent it from drooping. When the clamp moves a certain amount and the clamp is released by the clamp release means, the front end of the fabric slides off the clamp.

At the same time, or before or after this, the rod of the cloth hanger is lowered and retracted, releasing the support for the cloth.

Embodiment An overlock sewing machine 12 is installed on one side of the table 11 to perform safety stitches consisting of double chain stitches and edge stitches. A cloth guide 14 for guiding and feeding the cloth under the presser foot is attached, and a first cloth sensor 15 for detecting the cloth edge, which is composed of a light sensor having a light emitting part and a light receiving part, is provided.

An auxiliary cloth feeder, generally indicated by reference numeral 16, is provided on the cloth feed side of the presser foot 13. This auxiliary cloth feeder 16 includes a step motor 17, a puller arm 19 whose intermediate portion is pivotally supported on a shaft 18 that is rotationally driven by the step motor 17, and a puller arm 19 that is pivotally supported at the tip of the puller arm 19.
A puller 2 rotatably driven from 7 via a toothed belt 21
2, a pressing body 23 that acts to push down the puller arm 19 and press the puller 22 against the table 11 behind the presser foot, and a pressing body 23 that acts on the rear end of the puller arm 19 and always pushes the puller arm 19. It consists of an air cylinder 24 that pushes up against a pressing body 23, and a switching valve (not shown) and a step motor 17 to the air cylinder 24 are controlled by a controller 25. In other words, the first fabric When the sensor 15 detects the edge of the cloth, the output signal is input to a start timer (not shown) of the controller 25. After a certain period of time has elapsed, it is then input to the puller up/down timer, and after the set time has elapsed, the switching valve is switched. Then, the push-down on the rear end of the puller arm is released and the puller 22 is pressed onto the retable by the action of the pressing body 23. At the same time, the step motor 17 is driven to rotate the puller 22.

The pressing body 23 has a spring 48 and a pressing force adjustment screw 49 provided above the spring 48.
Presser foot pressure can be adjusted by screwing in the button.

Also facing between the presser foot 13 and the puller 22 are a suction pipe connected to a suction pump and a suction port 27 of a hollow ring cutting device 26 made of pulp that opens and closes the suction pipe.
is a Y-shaped double ring that connects the front and back ends of the cloth and a V-shaped border.
It is designed to suction the empty rings of the clothes, and the sucked empty rings are cut into small pieces with scissors (not shown) provided just below the suction port 27.

When suctioning the empty ring, the thread is loosened so that the empty ring can be easily sucked in. Although not shown, a pen cylinder is provided above the thread tension device 28 to loosen the thread so that the thread can be easily sucked. advance and retreat in between.

Reference numeral 29 shown in FIG. 1.2 is a second fabric sensor provided at the rear of the presser foot for detecting the edge of the fabric.

- The table 11 also has a hinge 31 at the rear in the cloth feeding direction.
(See FIG. 5.6), a stacker, generally designated by reference numeral 33, is disposed via a plate 32, which is connected to the table 11 so that it can be raised and lowered, and which is raised and lowered by an air cylinder 30.

The stacker 33 has a belt conveyor 37 that is horizontally suspended along the cloth feeding direction on one side of a frame 35 supported by [134] and is driven by a step motor 36, and the belt conveyor 37 has clamp mechanisms 38A and 38B.
, 38C are attached at regular intervals and circulated together with the belt conveyor 37.

As shown in detail in FIG. 5.6, the clamp mechanisms 38A and 388138C are rotatably connected to a support plate 39 supported by the belt conveyor 37 and to the support plate 39 so as to be opened and closed at all times by the action of a spring 41. a latch lever 44 that is pivoted on the support plate 39 and engages with the clamp plate 42 by the action of a spring 43; When the clamp plate 42 is pushed and closed against the action of the spring 41, it is engaged with the hook portion of the latch lever 44 and locked in the closed state. Further, when the latch lever 44 is pushed against the action of the spring 43 and separated from the clamp plate 42, the clamp plate 42 is opened by the action of the spring 41. The air cylinder 46 also engages the latch lever 44 to push and close the clamp plate 4-2 and close the clamp plate 4-2.
Regulating rod 47 for releasing the clamp plate in order to remove the layer from 2.
The former air cylinder 46 is attached to the plate 32, and the cloth hook operates with the plate 32 raised to push up the clamp plate 42.
The latter regulating rod 47 is supported by the frame 35 so that its position can be adjusted, and a latch lever 44 is positioned at the lower part of the path in which the clamp mechanisms 38A, 38B, and 38C circulate and moves to the left in FIG. 5.6. The opening position of the clamp plate 42 can be changed by changing the position in the left-right direction.

As shown in detail in FIG. 3, a pair of air cylinders 51A and 51B are arranged below the frame 35 at right angles to the cloth feeding direction, and are arranged side by side with their positions shifted in the cloth feeding direction. Both ends are passed through the downwardly protruding U-shaped portions 54 of a pair of horizontal arms 53 that are supported by air cylinders 52A, 52B and move up and down, and both ends are fixed to the U-shaped portions 54, and the air cylinders 51A, 51B The base end is pivotally supported by a crosspiece 56 so that it can pivot vertically. The cloth hanging rods 57A and 57B, which are piston rondos, are
The clamp mechanisms 38A, 38B, and 38C move forward and backward in a direction perpendicular to the cloth feeding direction below the circulation path, and support the fed cloth when skewering, while releasing the supported cloth when retracting. Its forward and backward movements and up and down movements are performed alternately.

In other words, the cloth hooks are alternately moved forward and backward by the rods 57A and 57B, and are alternately moved up and down by raising and lowering the horizontal arm 53, and one cloth hook is supplied with cloth when the rod protrudes at the upper position.
It is designed to release the supported cloth when it descends and retracts.

Figures 4A to 4D show the order of operation of the rods 57A and 57B for hanging the cloth, and when the rod 57A of one cloth hanging protrudes and descends with the cloth Wl hung thereon, the rod 57A of the cloth hanging is moved downwards. 57B
V rises while retracting (Fig. 4C).

After the rod 57B reaches the upper position and protrudes, the next cloth W8 that is sent out hangs on the rod 57B, while the rod 57A retracts and releases the supported cloth W1 (the fourth
(Fig. 8), the cloth hanger is raised until the rod 57A is retracted, and the rod 57B of the cloth hanger that supports the cloth W2 is lowered (Fig. 4C), and then the rod 57A protrudes and the cloth hanger is moved up to hold the new cloth. W
3 is hung, while the cloth hook is retracted by the rod 57B to release the supported cloth Wt (FIG. 4C).

As described above, cloth hanging can handle higher speeds by moving the rod back and forth and up and down.

The rods 57A and 57B of both cloth hooks move forward and backward at the same time, and even when the rod of one cloth hook is in the process of protruding and the rod of the other cloth hook is in the process of retracting, the cloth in the upper position hangs on the rod. This is because the cloth hook in the lower position will not hang on the rod, and the cloth released from the rod in the lower position will not hang on the rod again in the upper position.

The rod of the cloth hook in the lower position protrudes before the rod retreats, and the same is true when both cloth hooks have their rods protruding.

The vertical movement of the rods 57A, 57B is performed when the clamp mechanism reaches the standby position and is detected by the proximity sensor 58, and the movement is performed when the clamp mechanism 38A, 38B, 38C reaches the regulating rod 47 and the proximity sensor 59 detects the movement. is performed when the clamping mechanism is detected. The release of the clamp mechanism by the restriction rod 47 and the detection of the clamp mechanism by the proximity sensor 59 may be performed simultaneously, or the timing of release and detection of the clamp mechanism may be shifted back and forth by changing the position of the restriction rod or the proximity sensor. You can leave it there.

Reference numeral 62 shown in FIG. 1 is a guard bar that prevents the cloth from moving laterally with the rod when the rod that supports the cloth is moved backward, and 63 is a cloth holding stand.

The controller 25 is configured to drive a step motor 17 including an automatic sewing mode/manual sewing mode changeover switch, a blinking circuit for a temporary stop indicator lamp, various timers each of which operates in sequence according to an input signal from the first fabric sensor 15, and an air cylinder 24. Air supply circuits include output circuits for control, for raising and lowering the presser foot 13, for controlling the ON-OFF switch of the sewing machine motor drive circuit, for operating the pulp of the loop cutting device, and a timer that operates based on the input signal from the second fabric sensor 29. Cylinder 30 and 46 control circuit, proximity sensor 58
and 59, and the cloth hanging is carried out by the rod 57A.
, a circuit for the air cylinders y-sIA, 51B, 52A, and s2Bsqm for alternately advancing and retracting and moving up and down the 57B, a circuit that detects the rotation pulse of the sewing machine 12 and closes the valve of the empty ring cutting device based on it, and a conveyor drive. It is equipped with a circuit for driving the step motor 36, etc.

Operation The operation of the surging device will be explained based on the timing chart of FIG.

First, set the mode changeover switch on the controller 25 to automatic (at this time, the presser foot 13 is up), then place the fabric on the sewing machine table, pass the edge of the fabric through the fabric guide 14, and feed the leading edge of the fabric under the presser foot. When the leading edge of the fabric is fed under the presser foot and the first fabric sensor I5 detects this, the start timer is activated by the output signal, and after the set time A,
The puller up/down timer is activated and the presser foot 13 is lowered. When the presser foot 13 is lowered and another timer has elapsed for the set time B, the sewing machine motor and the valve of the empty ring cutting device 26 are activated to drive the sewing machine 12 and the empty ring at the tip of the cloth is sucked through the suction port 27. and cut with scissors.

The suction operation of the ring cutting device detects the rotation pulse of the sewing machine and is performed for a period C until the number of rotation pulses reaches a set value.

When the puller up/down timer times up after the set time, the air cylinder 24 operates and the piston rond 3
You can pull in 0. This causes the puller arm 19 to move toward the pressing body 2.
3, the puller 22 descends onto the cloth. At the same time as the puller 22 descends, the step motor 17 starts to rotate the puller 22 and feed the cloth. Surging is performed automatically as described above, but if you want to stop the work midway through, depress the stop pedal, and the sewing machine 12 stops, the puller 22 rises, and the temporary stop indicator lamp flashes.

When you press the start pedal to resume surging,
As the motor is started, the puller is lowered and surging continues. At the same time, the lamp goes out.

When the end of the fabric approaches and the first fabric sensor 15 detects that there is no more fabric, the sewing machine motor stop-timer operates, and after the set time E has elapsed, the sewing machine stops and the puller 22
rises. At the same time as the sewing machine motor stop timer clocks 7 fps, another timer operates and the set time F
After the elapse of time, the presser foot 13 is raised.

When the first fabric sensor 15 detects that the fabric is running out, the thread loosening timer is activated and the empty loop is cut!
126 is activated, and when the thread loosening timer times up after the set time G has elapsed, the pen cylinder is activated. As a result, the thread tension of the thread tension device 28 is relaxed, and a slack loop is created until the sewing machine stops as described above. On the other hand, the empty ring cutting device 26 is operated to cut the empty ring continuous to the sewing end.

When a new cloth is lifted and placed on the sewing machine table and fed to the sewing machine, the above operation is automatically repeated and surging is performed.

The finished sewing fabric is then sent to a stacker 33.

Figure 8 shows the timing chart of the stacker 33,
5 and 6 show the states at T1 and T2 in FIG. 8, respectively. When the second fabric processor 29 detects the leading edge of the fabric sent out from the sewing machine Cloth W after a while! When the tip of the cloth reaches the cloth clamping position of the clamp mechanism 38B, the air cylinder 46 is actuated to push up the clamp plate 42 and clamp the cloth tip.

On the other hand, while the proximity sensor 58 detects the clamp mechanism 38B, the step motor 36 that drives the conveyor 37
is stopped, and the above-mentioned clamping of the cloth tip is performed while it is stopped. Thereafter, the cloth hanging plate 32 is lowered by the operation of the air cylinder 30. After a set time (0.1 seconds) for the air cylinder 46 to operate and completely grip the fabric, the step motor 36 is started and the belt conveyor 37 is moved.

When the proximity sensor 58 detects the clamp mechanism 311B, the output signal causes the cloth hanging rod 57B to rise and the cloth hanging rod 57A to lower. In addition, the cloth that fell is stick 5.
The previous cloth W1 is held in 7A (4th AII),
As the belt conveyor 37 moves, the preceding clamp mechanism 38A comes into contact with the regulation frame 47 and releases the cloth W, and at the same time the proximity sensor 59 detects the clamp mechanism 38A.

And depending on the output signal, is the cloth hanging rod 5? As B protrudes, the rod 57A retracts the cloth W, releasing the cloth W (FIG. 48).The cloth W is released.

falls onto the cloth holding table 63 and is held there as shown by the arrow in FIG. On the protruding cloth hook 57B, the cloth Wt sent out from the sewing machine is hung. Belt conveyor 37
As the clamping mechanism 38B, which clamps the cloth end by the movement of the cloth W, pulls the cloth W hung on the rod 57B and moves it to the left in the figure, the second cloth sensor 29 clamps the rear end of the cloth W. When detected, the plate 32 of the cloth hanger rises.

The leading edge of the next new fabric fed out from the drawing sewing machine is the second
When detected by the cloth sensor, the leading end of the cloth is clamped by the clamp 38C, which reaches the cloth clamping position and stops in the same manner as described above.

Effects of the Invention According to the stacker of the present invention, since the clamp opens regardless of the size of the pulley or sprocket, the fabric delivered from the sewing device is reliably entered and clamped, and the system is also reliably released. The fabric can be released at any position by setting the clamp release means at any position, and since multiple clamp mechanisms are provided at regular intervals on the conveyor, the fabric sent out from the sewing machine can be can be clamped one after another by each clamping mechanism, and can cope with high speeds.The multiple cloth hanging rods are provided so that they can move forward and backward and up and down, thereby preventing contact and overlapping of the cloths sent sequentially from the sewing device. It has the advantage that it can be dropped onto the cloth holding table in an orderly manner, making it possible to increase the speed.

According to the above-mentioned serging device using a stacker, the stacker processes the fabric sent out from the sewing machine one after another and can handle increased speeds, making it possible to increase the speed of the surging device. When the fabric is fed into the sewing machine, sewing and stacking the fabric on the fabric holder are automatically performed, saving labor.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a surging device using a stacker according to the present invention, Fig. 2 is a perspective view of main parts of the surging device, Fig. 3 is a perspective view of a rod actuating device for hanging cloth, and Figs. 4A to 4D are The cloth hook is a diagram showing the operating order of the rod, Figures 5 and 6 are operation diagrams of the stacker, Figure 7 is a timing chart of the surging device, and Figure 8 is a timing chart of the stacker. 11...Table 12...Overlock sewing machine 13
...Presser foot 14..Fabric guide 15..First fabric sensor 16..Auxiliary fabric feed 17.
36...Step motor 19...Puller arm 22...Puller 24.30
．． 51A, 51B, 52A, 52B...Air cylinder 25...Controller 26...Air ring cutting device 29...Second fabric sensor 33
... Stacker 37 ... Belt conveyor 38A, 38
8138C...Clamp mechanism 44...Latch lever 4
7.Regulation rods 57A, 57B.. Cloth hangers are rods 5 Translation 59.
・Proximity sensor 63...Fabric holding stand Applicant Pegasus Sewing Machine Manufacturing Co., Ltd. Representative Patent attorney Akira Sato - X Figure 3

Claims (4)

[Claims] (1) A conveyor that is driven in circulation, a plurality of clamps that are attached to the conveyor at regular intervals and are biased in the opening direction by springs, a closing means that closes the clamps, and a closed state of the clamps. A locking means for locking the clamp, a clamp release means for unlocking the clamp at any preset position on the circulation path of the conveyor, and a clamp release means for unlocking the clamp at any preset position on the circulation path of the conveyor, and a clamp release means that can move forward and backward and up and down in a direction perpendicular to the cloth traveling direction below the circulation path. A sewing machine stacker provided with a plurality of cloth hanging rods. (2) The cloth hanging rods are a pair of parallel rods that move forward and backward and up and down in alternating positions, with one cloth hanging rod advancing from the upper position and supporting the first cloth, and then moving to the lower position. 2. A stacker for a sewing machine according to claim 1, wherein the second cloth hanging rod moves forward at an upper position to support the second cloth at the same time as the cloth support is released by retreating. (3) A stacker for a sewing machine according to claim 1, wherein the cloth hanging rod is activated based on a signal from a sensor that detects the position of the clamp. (4) a table, a sewing machine installed on the table, a cloth guide installed on the cloth feeding side in front of the presser foot to guide the fabric edge, and a cloth guide installed on the cloth feeding side behind the presser foot so as to be movable up and down; An auxiliary cloth feeder that sends out the cloth, a first fabric sensor that is installed on the cloth feeding side in front of the presser foot and that detects the edge of the cloth and controls the raising and lowering of the auxiliary cloth feeder, and a first fabric sensor that is installed behind the presser foot that detects the edge of the cloth. A stacker according to claim 1 is connected to the table, and the clamping mechanism of the stacker includes a second fabric sensor that detects the movement of the fabric from the sewing machine. A surging device that detects the edge of the fabric fed out and then clamps the edge of the fabric fed out from the sewing machine.