JPH11309290A - sewing machine - Google Patents

Abstract

(57) [Summary] [Purpose] The sewing machine motor does not continue to be driven, useless power is not consumed, and the needle does not enter a dangerous state of continuing to move up and down. [Structure] S / S for commanding drive / stop of sewing machine motor
When the switch 25 is depressed, the CPU 31 drives the motor 3 and resets the timer 33 for measuring the continuous drive time of the motor 3 to measure the continuous drive time of the motor 3. Then, the measurement time of the timer 33 is stored in the ROM.
CPU 31 sends a stop signal to drive circuit 41 to stop sewing machine motor 3 when the time reaches the limit time which is the time in which motor 3 can be continuously driven and stored in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic stopping device for a sewing machine.

[0002]

2. Description of the Related Art Conventionally, a sewing machine is configured as follows. An upper shaft rotatably supported by the sewing machine frame is operatively connected to a sewing machine motor via a well-known switching device. A balance, a needle bar, a feed dog, and a shuttle are respectively operatively connected to the upper shaft. With the rotation of the upper shaft, the balance, the needle bar, the shuttle, and the feed dog perform well-known operations. Sewing is performed.

Further, a bobbin winding shaft for winding a bobbin on a bobbin is rotatably and movably provided, and a bobbin retainer for appropriately winding the bobbin is provided. When the lower bobbin winding shaft is moved to the bobbin holding side, the switching device operates to operatively connect the lower bobbin winding shaft to the motor and disconnect the operative connection between the upper shaft and the motor. The switching between the sewing state and the thread winding state of the sewing machine by the movement of the bobbin winding shaft described above is described in JP-B-61-4553, and further detailed description will be omitted.

When the bobbin is wound by a predetermined amount of thread, the operative connection between the lower thread winding shaft and the motor is released and the rotation of the lower thread winding shaft is stopped. At this time, the operative connection between the motor and the upper shaft is released. Is left standing. Here, the sewing machine is provided with a start / stop switch, and the motor is driven by pressing the switch, and the motor is stopped by pressing again. For this reason, when the predetermined thread amount is wound on the bobbin, the lower thread winding shaft is stopped, but the motor continues to be driven. Therefore, the operator presses the start / stop switch again to stop the motor.

On the other hand, when sewing, the operator moves the lower bobbin winding shaft backward, operatively connects the upper shaft and the motor, presses a start / stop switch, and rotates the upper shaft by the motor. Press the start / stop switch again to stop the motor. In the sewing machine configured as described above, in order to stop the drive of the motor that drives the balance, the needle bar, the shuttle, the feed dog, and the bobbin winding shaft, the start / stop switch for instructing the start / stop of the motor is operated. Must be pressed by the user. There is also known a sensor that detects the presence or absence of a needle thread or cloth with a sensor and stops the motor when the needle thread breaks or the cloth runs out.

[0006]

However, at the time of bobbin winding, even if the bobbin winding ends and the rotation of the bobbin bobbin stops, the motor continues to be driven until the start / stop switch is pressed. Therefore, when the operator is away from the sewing machine or forgets to press the start / stop switch, the motor continues to be driven, causing a problem of wasteful power consumption.

In addition, the detection of the presence of a broken thread or the presence of a cloth requires sensors and other parts, which increases the cost of the sewing machine. In reality, the sewing machine is mounted only on some high-priced sewing machines. In an inexpensive sewing machine, the motor drive is stopped by pressing a start / stop switch by an operator. Therefore, at the time of sewing, when the worker is away from the sewing machine for some reason, or is in a state where it is impossible to artificially execute the intention to stop for some reason, such as falling asleep, the motor continues to be driven. Power consumption, and at the same time, there is a problem that the needle is in a dangerous state of moving up and down.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and eliminates the need to continuously drive the motor of the sewing machine, thereby preventing wasteful power consumption.
An object of the present invention is to provide an automatic stop device for a sewing machine for safety so that a dangerous state in which a needle keeps moving up and down does not occur.

[0009]

In order to achieve this object, an automatic stopping device for a sewing machine according to the present invention comprises: a driving means for driving a sewing machine; a measuring means for measuring a continuous driving time of the sewing machine by the driving means; Storage means for storing data related to a predetermined time during which the sewing machine can be continuously driven by the driving means, and when the continuous driving time of the sewing machine measured by the measurement means reaches the predetermined time stored in the storage means, Stopping means for stopping the driving of the sewing machine by the driving means.

[0010]

The automatic stop device for a sewing machine according to the present invention having the above-described structure, when the continuous driving time of the sewing machine measured by the measuring means reaches the data related to the predetermined time stored in the storage means, the stopping means is activated. The driving of the sewing machine by the driving means is stopped.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a motor 3 is fixed to a machine frame of the sewing machine pillar 1, and a motor shaft 3a protruding to the left and right sides of the motor 3 is provided on the left side in FIG. A slit plate 5 having a number of slits formed thereon is fixed, and a photo interrupter 7 for detecting a slit of the slit plate and detecting a rotation speed of the motor 3 is attached to a sewing machine frame. A pulley 9 is fixed to a right portion of the motor shaft 3a in FIG. 2, and a belt 11 is hung on the pulley 9. The belt 11 is hung on a timing pulley 13 rotatably supported by the sewing machine frame. Thus, the timing pulley 13 rotates with the rotation of the motor shaft 3a driven by the motor 3.

An upper shaft 15 is rotatably supported by the sewing machine frame, and the upper shaft 15 has a well-known balance (not shown).
The needle bar, the shuttle and the feed dog are connected respectively. Upper shaft 1
With the rotation of 5, the balance, the needle bar, the shuttle, and the feed dog perform known operations to perform sewing. The upper shaft 15 is provided with a clutch mechanism 17.
7, the timing pulley 13 and the upper shaft 15 are connected.
Separation is possible.

A bobbin shaft 21 for winding the bobbin thread T around the bobbin 19 is rotatably provided at the upper right end in FIG. 2 of the sewing machine frame, and a bobbin retainer 23 for appropriately winding the thread T is provided. I have. To change the sewing machine from the sewing state to the bobbin winding state, the bobbin shaft 21 is moved to the bobbin presser 23 side. Then, the clutch mechanism 17 operates, and the bobbin shaft 2
1 and the timing pulley 13 and the upper shaft 15 and the timing pulley 13 are disconnected.

A disc-shaped bobbin retainer 23 is rotatably mounted at an eccentric position on a shaft provided on the sewing machine frame in parallel with the bobbin shaft 21. By rotating the bobbin presser 23 to change the fixing position, the amount of thread wound on the bobbin 19 can be adjusted. The connection with the timing pulley 13 is released, and the rotation of the bobbin shaft 21 is stopped.

A start / stop switch 25 (hereinafter abbreviated as S / S switch) for instructing start / stop of the sewing machine motor 3 shown in FIG. 1. A sewing pattern is displayed in a sewing state, and a thread winding state. A display indicating the thread winding state is sometimes displayed, a liquid crystal display device 26 for displaying a limit time, which is a time during which the motor 3 can be continuously driven in the sewing state and the thread winding state, a speed volume 27 for adjusting the rotation speed of the motor 3, A numeric keypad 29 for setting the limit time is provided on the operator side of the sewing machine.

As shown in FIG. 1, the sewing machine of this embodiment is C
A control unit based on the PU 31 is provided. The CPU
31 has an S / S switch 25 and a speed volume 2
7, a timer 33 for measuring the continuous driving time of the photo interrupter 7, the numeric keypad 29, and the sewing machine motor 3, and an R for storing the limit time set by operating the numeric keypad 29.
An AM 35 and a ROM 37 storing a sewing machine driving program and a preset limit time are connected to each other. Further, the liquid crystal display device 26 is connected to the CPU 31 via a display circuit 39 for indicating the state of the sewing machine, and the sewing machine motor 3 is connected via a drive circuit 41.

A time slightly longer than the maximum continuous motor driving time considered under normal use conditions is stored in the ROM 37 in advance as a limit time. For example, the rotational speed of the sewing machine motor 3 is 2 minutes at the maximum speed, and 15 minutes at the minimum speed. When,
It is set in several stages according to the setting of the speed volume 27. However, when the motor 3 is driven for a longer time than the limit time stored in the ROM 37, the limit time can be changed by operating the numeric keypad 29, and the changed limit time is stored in the RAM 35. You. When the ten-key 29 is operated to change the limit time, the limit time of the speed stage corresponding to the position of the speed volume 27 at that time is changed, and the limit times of other speed stages are also changed according to the changed ratio. It is stored in the RAM 35. When the power of the sewing machine is turned off, the limit time stored in the RAM 35 disappears. When the sewing machine is turned on again, the limit time becomes the limit time stored in the ROM 37.

Then, the CPU 31 follows the program stored in the ROM 37 and executes the S / S switch 25, the speed control 27, the photo interrupter 7, the ten key 2
9, the display of the liquid crystal display device 26 and the sewing machine motor 3 are controlled by signals from the timer 33 and the RAM 35, respectively.

The operation of the automatic stopping device for the sewing machine according to the present embodiment will be described with reference to the flowchart of FIG.

First, power is turned on to the sewing machine. Here, when the numeric key 29 is pressed (step S1 · YE
S, hereinafter simply abbreviated as S1 · YES), CPU
31 stores the limit time set by operating the ten key 29 in the RAM 35 (S2). Then, the set limit time is displayed on the liquid crystal display device 26 (S3). On the other hand, if the numeric key 29 is not pressed (S
1 · NO), the limit time is a limit time stored in the ROM 37 in advance, and the CPU 31 causes the liquid crystal display device 26 to display the limit time (S3).

When the S / S switch 25 is pressed (step S4: YES), the CPU 31 drives the motor 3 and resets the timer 33 to measure the continuous driving time of the motor 3 (S5). . Timer 3
When the measurement time of No. 3 reaches the limit time (S6 · YE
S), the CPU 31 sends a stop signal to the drive circuit 41 to stop the sewing machine motor 3 (S11).

During the operation of the sewing machine motor 3 (S6
NO), when the speed volume 27 is operated (S7
YES), the CPU 31 changes the rotation speed of the motor 3 to a speed corresponding to the speed volume 27, and
3 to reset the continuous drive time of the motor 3,
A display signal is sent to the display circuit 39 to change the display of the limit time of the liquid crystal display device 26 to the limit time according to the stage of the speed volume 27 (S8). When the time measured by the timer 33 reaches the limit time (S9: YES), C
The PU 31 sends a stop signal to the drive circuit 41 to stop the sewing machine motor 3 (S11). Within the limit time (S9
(NO), when the S / S switch 25 is pressed (S10)
(YES), the CPU 31 stops the motor 3 (S1)
1).

As described above, in the automatic sewing machine stopping device according to the present invention, the sewing machine motor 3 does not continue to be driven. Therefore, when the bobbin winding is completed, the operator separates from the sewing machine after the bobbin winding is completed. Status, S / S switch 2
Even if the user forgets to press 5, no wasteful power is consumed. In addition, even if the worker is away from the sewing machine for some reason during sewing, or if it is impossible to artificially execute the intention to stop for some reason, such as falling asleep while using the machine, wasteful power is consumed. Without stopping, it is safe to stop the dangerous situation where the needle moves up and down.

In the present embodiment, the continuous driving time of the motor 3 is measured, and when the measured time reaches a predetermined time, the motor 3 is stopped. However, the number of continuous rotations of the motor 3 is measured. When the measured number of rotations reaches a predetermined number of rotations, the motor 3 may be stopped.

In this embodiment, the S / S switch 25
Is used to start and stop the sewing machine motor 3, but the motor 3 may be started and stopped using a foot controller.

The present invention is not limited to the embodiment described in detail above, and various changes can be made without departing from the gist of the present invention.

[0028]

As is apparent from the above description, in the automatic motor stopping device of the present invention, the sewing machine motor does not continue to be driven, no wasteful power is consumed, and the needle continues to move up and down. It has the advantage of not being dangerous.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control system of a sewing machine showing an embodiment embodying the present invention.

FIG. 2 is an explanatory diagram showing a driving unit of the sewing machine.

FIG. 3 is a flowchart illustrating an operation of the automatic stopping device of the sewing machine.

[Explanation of symbols]

 3 Motor 3a Motor shaft 9 Pulley 11 Belt 13 Timing pulley 15 Upper shaft 31 CPU 33 Timer 35 RAM 37 ROM

[Procedure amendment]

[Submission date] April 9, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Sewing machine

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is, to the measurement with respect to the drive
Related to a sewing machine.

[0002]

2. Description of the Related Art Conventionally, a sewing machine is configured as follows. An upper shaft rotatably supported by the sewing machine frame is operatively connected to a sewing machine motor via a well-known switching device. A balance, a needle bar, a feed dog, and a shuttle are respectively operatively connected to the upper shaft. With the rotation of the upper shaft, the balance, the needle bar, the shuttle, and the feed dog perform well-known operations. Sewing is performed.

Further, a bobbin winding shaft for winding a bobbin on a bobbin is rotatably and movably provided, and a bobbin retainer for appropriately winding the bobbin is provided. When the lower bobbin winding shaft is moved to the bobbin holding side, the switching device operates to operatively connect the lower bobbin winding shaft to the motor and disconnect the operative connection between the upper shaft and the motor. The switching between the sewing state and the thread winding state of the sewing machine by the movement of the bobbin winding shaft described above is described in JP-B-61-4553, and further detailed description will be omitted.

When the bobbin is wound by a predetermined amount of thread, the operative connection between the lower thread winding shaft and the motor is released and the rotation of the lower thread winding shaft is stopped. At this time, the operative connection between the motor and the upper shaft is released. Is left standing. Here, the sewing machine is provided with a start / stop switch, and the motor is driven by pressing the switch, and the motor is stopped by pressing again. For this reason, when the predetermined thread amount is wound on the bobbin, the lower thread winding shaft is stopped, but the motor continues to be driven. Therefore, the operator presses the start / stop switch again to stop the motor.

On the other hand, when sewing, the operator moves the lower bobbin winding shaft backward, operatively connects the upper shaft and the motor, presses a start / stop switch, and rotates the upper shaft by the motor. Press the start / stop switch again to stop the motor.

In the sewing machine configured as described above, a balance,
Drive the motor that drives the needle bar, shuttle, feed dog and bobbin winding shaft.
To stop, command start / stop of the motor
The operator must press the start / stop switch
is there. In addition, the presence or absence of needle thread or cloth is detected by a sensor, and
Some stop the motor when the thread breaks or the cloth runs out.
Are known. At the time of bobbin thread winding,
Even if the winding shaft stops rotating, the motor will not
It keeps driving until the switch is pressed. Yo
The operator is away from the sewing machine,
If you forget to press the stop switch, the motor
The problem of wasteful power consumption due to continued driving
is there.

Further, the detection of the breakage of the upper thread or the presence of
The cost of the sewing machine increases because parts such as
Currently installed only on some high-priced sewing machines.
As it is true, stopping the motor drive with an inexpensive sewing machine
Press the start / stop switch by the operator
ing. Therefore, when sewing, work for some reason
Is dozing when he is away from the sewing machine or near
A state in which the intention of suspension cannot be artificially executed for any reason
In this state, the motor continues to drive,
Costly and at the same time dangerous movement of the needle up and down
Problem.

[0008]

However, as described above,
In such a conventional sewing machine, the drive of the sewing machine is
Information about the drive of the sewing machine
A special display to inform the
There is a problem that the composition becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and utilizes a display of a sewing state of a sewing machine.
To provide a sewing machine capable of displaying driving information
Is the purpose.

[0010]

In order to achieve this object, a sewing machine according to the present invention comprises a driving means for driving the sewing machine,
Starting means for starting driving of the sewing machine by the driving means;
After the start of driving, the sewing machine
Displays measurement means for performing measurements and information related to the measurement
Display means for displaying a sewing pattern in a sewing state;
Stores information related to measurement even when the sewing machine is turned off
Storage means.

[0011]

According to the sewing machine of the present invention having the above structure, the sewing machine
Even if the power of the sewing machine is turned off,
Display means for displaying sewing patterns in the manufacturing state.
The related information is displayed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a motor 3 is fixed to the machine frame of the sewing machine pillar 1, and a motor shaft 3a protruding to the left and right sides of the motor 3 is provided on the left side in FIG. A slit plate 5 having a number of slits formed thereon is fixed, and a photo interrupter 7 for detecting a slit of the slit plate and detecting a rotation speed of the motor 3 is attached to a sewing machine frame. A pulley 9 is fixed to a right portion of the motor shaft 3a in FIG. 2, and a belt 11 is hung on the pulley 9. The belt 11 is hung on a timing pulley 13 rotatably supported by the sewing machine frame. Thus, the timing pulley 13 rotates with the rotation of the motor shaft 3a driven by the motor 3.

An upper shaft 15 is rotatably supported by the sewing machine frame.
The needle bar, the shuttle and the feed dog are connected respectively. Upper shaft 1
With the rotation of 5, the balance, the needle bar, the shuttle, and the feed dog perform known operations to perform sewing. The upper shaft 15 is provided with a clutch mechanism 17.
7, the timing pulley 13 and the upper shaft 15 are connected.
Separation is possible.

2, a bobbin shaft 21 for winding the bobbin thread T around the bobbin 19 is provided rotatably, and a bobbin retainer 23 for appropriately winding the thread T is provided at the upper right end in FIG. I have. To change the sewing machine from the sewing state to the bobbin winding state, the bobbin shaft 21 is moved to the bobbin presser 23 side. Then, the clutch mechanism 17 operates, and the bobbin shaft 2
1 and the timing pulley 13 and the upper shaft 15 and the timing pulley 13 are disconnected.

A disc-shaped bobbin retainer 23 is rotatably mounted at an eccentric position on a shaft provided in the sewing machine frame in parallel with the bobbin shaft 21. By rotating the bobbin presser 23 to change the fixing position, the amount of thread wound on the bobbin 19 can be adjusted. The connection with the timing pulley 13 is released, and the rotation of the bobbin shaft 21 is stopped.

A start / stop switch 25 (hereinafter abbreviated as S / S switch) for instructing start / stop of the sewing machine motor 3 shown in FIG. A display indicating the thread winding state is sometimes displayed, a liquid crystal display device 26 for displaying a limit time, which is a time during which the motor 3 can be continuously driven in the sewing state and the thread winding state, a speed volume 27 for adjusting the rotation speed of the motor 3, A numeric keypad 29 for setting the limit time is provided on the operator side of the sewing machine.

As shown in FIG. 1, the sewing machine of this embodiment is C
A control unit based on the PU 31 is provided. The CPU
31 has an S / S switch 25 and a speed volume 2
7, a timer 33 for measuring the continuous driving time of the photo interrupter 7, the numeric keypad 29, and the sewing machine motor 3, and an R for storing the limit time set by operating the numeric keypad 29.
An AM 35 and a ROM 37 storing a sewing machine driving program and a preset limit time are connected to each other. Further, the liquid crystal display device 26 is connected to the CPU 31 via a display circuit 39 for indicating the state of the sewing machine, and the sewing machine motor 3 is connected via a drive circuit 41.

A time slightly longer than the maximum continuous motor driving time considered under normal operating conditions is stored in advance in the ROM 37 as a limit time. For example, the rotation speed of the sewing machine motor 3 is 2 minutes at the maximum speed, and 15 minutes at the minimum rotation speed. When,
It is set in several stages according to the setting of the speed volume 27. However, when the motor 3 is driven for a longer time than the limit time stored in the ROM 37, the limit time can be changed by operating the numeric keypad 29, and the changed limit time is stored in the RAM 35. You. When the ten-key 29 is operated to change the limit time, the limit time of the speed stage corresponding to the position of the speed volume 27 at that time is changed, and the limit times of other speed stages are also changed according to the changed ratio. It is stored in the RAM 35. When the power of the sewing machine is turned off, the limit time stored in the RAM 35 disappears. When the sewing machine is turned on again, the limit time becomes the limit time stored in the ROM 37.

Then, the CPU 31 follows the program stored in the ROM 37 and executes the S / S switch 25, speed volume 27, photo interrupter 7, numeric keypad 2
9, the display of the liquid crystal display device 26 and the sewing machine motor 3 are controlled by signals from the timer 33 and the RAM 35, respectively.

The operation of the sewing machine automatic stop device of this embodiment will be described with reference to the flowchart of FIG.

First, power is turned on to the sewing machine. Here, when the numeric key 29 is pressed (step S1 · YE
S, hereinafter simply abbreviated as S1 · YES), CPU
31 stores the limit time set by operating the ten key 29 in the RAM 35 (S2). Then, the set limit time is displayed on the liquid crystal display device 26 (S3). On the other hand, if the numeric key 29 is not pressed (S
1 · NO), the limit time is a limit time stored in the ROM 37 in advance, and the CPU 31 causes the liquid crystal display device 26 to display the limit time (S3).

When the S / S switch 25 is depressed (step S4, YES), the CPU 31 drives the motor 3 and resets the timer 33 to measure the continuous driving time of the motor 3 (S5). . Timer 3
When the measurement time of No. 3 reaches the limit time (S6 · YE
S), the CPU 31 sends a stop signal to the drive circuit 41 to stop the sewing machine motor 3 (S11).

During the operation of the sewing machine motor 3 (S6
NO), when the speed volume 27 is operated (S7
YES), the CPU 31 changes the rotation speed of the motor 3 to a speed corresponding to the speed volume 27, and
3 to reset the continuous drive time of the motor 3,
A display signal is sent to the display circuit 39 to change the display of the limit time of the liquid crystal display device 26 to the limit time according to the stage of the speed volume 27 (S8). When the time measured by the timer 33 reaches the limit time (S9: YES), C
The PU 31 sends a stop signal to the drive circuit 41 to stop the sewing machine motor 3 (S11). Within the limit time (S9
(NO), when the S / S switch 25 is pressed (S10)
(YES), the CPU 31 stops the motor 3 (S1)
1).

As described above, in the automatic sewing machine stopping device of the present invention, the sewing machine motor 3 does not continue to be driven. Status, S / S switch 2
Even if the user forgets to press 5, no wasteful power is consumed. In addition, even if the worker is away from the sewing machine for some reason during sewing, or if it is impossible to artificially execute the intention to stop for some reason, such as falling asleep while using the machine, wasteful power is consumed. Without stopping, it is safe to stop the dangerous situation where the needle moves up and down.

In this embodiment, the continuous driving time of the motor 3 is measured, and when the measured time reaches a predetermined time, the motor 3 is stopped. However, the number of continuous rotations of the motor 3 is measured. When the measured number of rotations reaches a predetermined number of rotations, the motor 3 may be stopped.

In this embodiment, the S / S switch 25
Is used to start and stop the sewing machine motor 3, but the motor 3 may be started and stopped using a foot controller.

The present invention is not limited to the embodiment described in detail above, and various modifications can be made without departing from the gist of the present invention.

[0029]

As apparent from the above description, the book
In the sewing machine of the invention, the information of the driving of the sewing machine is turned off and the power is turned off.
Memorize it and display the sewing pattern in the sewing state.
There is no need to provide a dedicated display on the sewing machine
Is stored and displayed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control system of a sewing machine showing an embodiment embodying the present invention.

FIG. 2 is an explanatory diagram showing a driving unit of the sewing machine.

FIG. 3 is a flowchart illustrating an operation of the automatic stopping device of the sewing machine.

[Description of Signs] 3 Motor 3a Motor shaft 9 Pulley 11 Belt 13 Timing pulley 15 Upper shaft 31 CPU 33 Timer 35 RAM 37 ROM

Claims (1)

[Claims] A driving means for driving the sewing machine; a measuring means for measuring a continuous driving time of the sewing machine by the driving means; and a storage means for storing data relating to a predetermined time during which the driving means can continuously drive the sewing machine. And stopping means for stopping driving of the sewing machine by the driving means when the continuous driving time of the sewing machine measured by the measuring means reaches a predetermined time stored in the storage means. Automatic stop device for sewing machine.