JPH0148027B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention includes an internal memory provided in a sewing machine frame and an external memory that is removable from the sewing machine frame, and stores data in both memories. The present invention relates to a sewing machine that selects and forms a desired pattern from among a large number of patterns.

[Prior Art] Currently, sewing machines have been commercialized in which a small, large-capacity electronic memory is installed in the sewing machine frame, and more than 100 patterns stored in the electronic memory are selectively formed. In order to dramatically increase the number of patterns that can be formed compared to a sewing machine, frequently used patterns are stored in an internal memory inside the sewing machine frame, and less frequently used patterns are stored in an external memory that is removable from the sewing machine frame. A sewing machine has been proposed in which both memories can be stored and both memories can be selected using a changeover switch.

[Problems to be Solved by the Invention] However, when the pattern in the internal memory and the pattern in the external memory are combined to form a pattern, when the external memory is accidentally removed from the sewing machine frame, the data in the external memory is The setting position of the feed adjuster that adjusts the swing position and feed movement of the sewing needle in relation to the pattern becomes uncertain, which may cause the overall shape of the combined pattern to collapse and damage the sewn product, or cause the needle and sewing tools such as the presser foot to There was a risk of causing a collision.

[Object of the Invention] The present invention has been made in order to solve the above-mentioned problems, and its purpose is to improve the external memory pattern in a combination pattern of a plurality of internal memory patterns and external memory patterns. If the external memory is accidentally removed from the sewing machine frame during pattern formation, the sewing machine will automatically stop after completing the pattern formation in the external memory to prevent collision between the sewing tool and the sewing needle. Another object of the present invention is to provide a sewing machine that can prevent damage to sewn products.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a temporary storage memory provided within the sewing machine frame and having a storage capacity capable of temporarily storing data related to one pattern. , after the pattern designation information selected by the pattern selection means in a combination pattern made up of a plurality of patterns in the first pattern group stored in the internal memory and the second pattern group stored in the external memory. a scanning means for sequentially scanning each piece of pattern designation information combined with the pattern to determine whether or not each pattern belongs to the second pattern group; A data transfer means for transferring data related to the pattern from an external memory to a temporary memory, and a pattern selection means for selecting one of the internal memory and the temporary memory as a memory for storing data to be supplied to the stitch forming means. memory selection means that selects a pattern by determining whether the selected pattern belongs to the first pattern group; and the external memory is removed from the sewing machine frame while the temporary storage memory is selected. and a stop means for automatically stopping the operation of the sewing machine in connection with reading out all data in the temporary storage memory when detachment of the external memory is detected.

[Function] In the present invention having the above-described configuration, each pattern in the combination pattern is sequentially determined by the scanning means, and it is determined that each pattern in the combination pattern after the pattern selected by the pattern selection device belongs to the second pattern group. Data regarding one pattern determined first is stored in a temporary storage memory. The patterns belonging to the first pattern group in the combination pattern are formed according to the data from the internal memory, and the patterns belonging to the second pattern group are formed according to the data from the temporary storage memory. When the detection means detects that the external memory is removed from the sewing machine frame while the pattern is being formed according to the data from the temporary memory, the stopping means removes the data from the temporary memory. The operation of the sewing machine is automatically stopped in connection with reading all data.

Therefore, since the pattern belonging to the second pattern group in the combination pattern is formed according to the data from the temporary memory provided in the sewing machine frame, it is possible that the external memory may be accidentally removed from the sewing machine frame. Even when
Collision between the sewing needle and the sewing tool can be reliably prevented. When the external memory is removed, the sewing machine automatically stops after the formation of the patterns belonging to the second pattern group is completed, so the pattern that was formed when the external memory is removed does not collapse, and the sewn product remains unchanged. Damage can also be prevented. Moreover, the temporary storage memory has a relatively small capacity that stores only data related to one pattern in the second pattern group that is first determined by the scanning means, and a special large capacity memory is required for the control circuit of the electronic sewing machine. There is no need to add more memory.

[Example] An example of the present invention will be described below with reference to the drawings.

First, the basic configuration of this embodiment will be explained with reference to FIG.

An internal memory 12 provided in a sewing machine frame 10 indicated by a dashed line in FIG. An external memory 14 that is removably attached to the frame 10 stores stitch data regarding each pattern in the second pattern group that is used relatively infrequently. The pattern combination means 16 includes both memories 1
2 and 14 and sequentially designate a desired pattern from both pattern groups to perform a pattern combination, and the combined patterns are selected by the pattern selection means during operation of the sewing machine. 18, the pattern is selected according to the pattern designation order. Furthermore, the patterns that are combined after the pattern selected by the pattern selection means 18 among the plurality of combined patterns are sequentially scanned by the scanning means 20 to determine whether or not they belong to the second pattern group. All stitch data regarding one pattern that is first determined by the scanning means to belong to the second pattern group is read out from the external memory 14 by the data transfer means 22 and written into the temporary storage memory 24. The memory selection means 26 determines whether or not the pattern selected by the pattern selection means 18 belongs to the first pattern group, and when it is determined that the pattern belongs to the first pattern group, the memory selection means 26 stores the stitch data from the internal memory 12. The stitch data is allowed to pass from the temporary storage memory 24 when it is determined that the pattern belongs to the second pattern group. Memory selection means 2
Each stitch data in the memory selected by 6 is as follows.
The information is read out by the control means 30 in synchronization with the rotation of the main shaft of the sewing machine, and is supplied to the stitch forming device 28 and used to determine the forming position of each stitch.

On the other hand, while the temporary storage memory 24 is selected by the memory selection means 26, the control means 30 detects, in cooperation with the memory attachment/detachment detection means 32, that the external memory 14 is detached from the sewing machine frame 10, and stops the external memory 14. Operate 34. The stopping means 34 determines whether or not the data output from the temporary storage memory 24 is stitch data three stitches before the end of the pattern, and determines that the data is stitch data three stitches before the end of the pattern. At this time, the motor drive control device 36 starts the stopping operation, and when all the stitch data in the temporary storage memory 24 is read out, the motor drive control device 36 stops the power supply to the sewing machine motor 38. Due to the action of the stopping means 34 and the motor drive control device 36, if the external memory 14 is removed while a pattern belonging to the second pattern group in the combination pattern is being formed, the pattern being formed will be Once completed, the sewing machine will automatically stop.

FIG. 2 shows the appearance of the sewing machine of this embodiment. A needle bar 42 that can move vertically and swing horizontally is disposed at the head of an upper arm 40 constituting the sewing machine frame 10. A sewing needle 44 is attached to the lower end. In order to transfer the work cloth, a feed dog 38 is arranged within the bed 46 to which a four-movement feed is applied by a known feed mechanism, and the feed movement is controlled by a feed adjuster (not shown).

A display board 50 is fixed to the front surface of the upper arm 40 on which figures and two-digit corresponding numbers are posted for each of the frequently used patterns in the first group of patterns. Further, on the front surface of the pillar section 52, there are ten input keys 54 corresponding to the numbers "0" to "9", respectively, for specifying a desired pattern using the corresponding number, and a plurality of input keys 54 for specifying a desired pattern using the corresponding number. A combination key 56 that can be operated for combination is provided. A numeric display 58 is provided to visually display the corresponding number input by the input key 54. Internal memory 12 provided within the sewing machine frame 10 to store frequently used first pattern groups
A memory selection switch 60 is provided which is movable between two selection positions in order to select one of the external memory 14 for storing a second pattern group that is less frequently used, and on the left side thereof, external memory 14
A light emitting diode (see below) that displays the selection status of
62 (denoted as LED) are arranged.

The external memory 14 is housed in a memory cassette 64, and the cassette is placed in a storage chamber 66 horizontally bored in the pillar portion 52, as shown in FIG.
It is configured to be detachable from the A connector 68 for connecting the external memory 14 to a central processing unit 80, which will be described later, is arranged on the left side of the storage chamber 66. Further, a limit switch 70 is disposed close to the storage chamber 66 to detect whether the memory cassette 64 is attached or detached, and the limit switch 70 corresponds to the memory attachment or detachment detection means 32 in FIG.

Further, a start/stop switch 74 is disposed at the head of the upper arm 40 for starting and stopping the sewing machine motor 38.

The electrical configuration of this embodiment will be explained with reference to FIG.

Memory selection switch 60, when in the left position as shown in FIG. 2 to select internal memory 12, outputs a low level output signal PS1 to central processing unit 8.
0, and according to the signal PS1, the central processing unit 80 sends a low level signal DM to turn off the LED 62.
Output. Conversely, when switched to the right position to select the external memory 14, a high level output signal PS1 is provided to the central processing unit 80, which causes the central processing unit 80 to output a high level signal that causes the LED 62 to illuminate. Output DM. When the input key 54 is operated to select a desired pattern from the pattern group in the memory selected by the memory selection switch 60, the encoder 82 outputs a code signal PN representing the input corresponding number and a two-digit corresponding number. A high level pulse PS2 synchronized with the completion of the input is supplied to the central processing unit 80. At this time, the central processing unit 80 outputs a signal DN for displaying the corresponding number to the numeric display 58 in accordance with the signal PN.
Further, the combination key 56 outputs a high level output signal PS3 when it is operated, and a low level output signal when it is released.
PS3 is supplied to the central processing unit 80, and the limit switch 70 supplies a high level output signal PS4 to the central processing unit 80 when the memory cassette 64 is attached, and a low level output signal PS4 when it is removed.

The first address memory 84 is connected to both memories 12 and 1.
The central processing unit 80 receives the pattern code signal PAC converted from the signal PS1 and the signal PN and outputs one start address signal HAD. Output. In addition, external memory 1
4, the number of addresses prepared for each pattern is made constant regardless of the pattern type, and even when a different external memory is used, the start address signal HAD related to the external memory in the start address memory 84 is changed. There's no need. Also,
Each of the memories 12 and 14 stores a group of stitch data SD for forming a pattern for each pattern, and stitch data for a stitch 3 stitches before the end of the pattern.
It stores stop instruction data SPD that is paired with SD, and end data PED that indicates the end of the pattern.

An intermediate memory 86 is provided to sequentially temporarily store the head address signal HAD from the head address memory 84 in response to the operation of the combination key 56, and during operation of the sewing machine motor 38, the pattern shown in FIG. The head address signal HAD is stored at the address specified by the internal counter C1 of the central processing unit 80 acting as the selection means 18, and while the motor is stopped, the head address signal HAD is output from the address specified by the counter C1. . Input key 54, combination key 56, memory selection switch 60, encoder 8 shown in FIG.
2. Start address memory 84 and intermediate memory 86
constitutes the pattern combining means 16 shown in FIG.

The central processing unit 80 loads the head address signal HAD outputted from the intermediate memory 86 while the sewing machine motor 38 is operating into an internal counter C2, and generates the signal HAD from the timing signal generator 88 when the sewing needle 44 reaches a predetermined position. In response to the high level pulse TP, counter C2 is activated by its starting address signal.
Advance from HAD. The contents of counter C2 are supplied to and used to address the memory designated by memory selection switch 60, and stitch data SD is output from the designated memory to central processing unit 80. Ru. and,
The central processing unit 80 supplies the stitch data SD to the actuator drive circuit 90, which drives the needle swing actuator 92 and the feed actuator 94 to adjust the swing position of the needle bar 42 and the adjustment position of the above-mentioned feed adjuster. Set. Actuator drive circuit 90 and both actuators 92, 94 constitute seam forming device 28 in FIG.

The motor drive control device 36 controls the operation of the sewing machine motor 38, and when the start/stop switch 74 is operated while the motor is stopped, it outputs a high-level signal CM indicating motor operation to the central processing unit 80, and also controls the motor. Activate 38. Conversely,
Low level signal CM indicating motor stop when start/stop switch 74 is operated while motor is running
is output to the central processing unit 80 and the motor 38
to stop. Further, the motor drive control device 36 drives the motor 38 at a constant low speed in accordance with a motor low speed command from the central processing unit 80, and drives the motor 38 at a constant low speed in accordance with a motor stop command from the central processing unit 80.
Cut off the power supply to 8.

A temporary storage memory 24 is provided in the sewing machine frame 10 to temporarily store all data regarding one pattern belonging to the second pattern group among the plurality of patterns combined by the combining means 16. has a relatively small storage capacity that can store all data related to only one pattern.

The operation of this embodiment having the configuration described above will be explained according to the flowcharts shown in FIGS. 5 to 7. In the flowchart, a high level state of the signal is represented by "1", and a low level state of the signal is represented by "0".

First, when the sewing machine is powered on, initial settings are performed, and the internal counters C1 and C2 described above and internal counters C3, C4, and C5 used in the data temporary storage routine described later are reset, and the central processing Many flags CF, BF, MF, CMF, and THF prepared inside the device 80 are “0”.
is set to

Here, when the memory cassette 64 is attached to the sewing machine frame 10 in order to combine the pattern in the internal memory 12 and the pattern in the external memory 14, the limit switch 70 outputs a high level signal PS4 to the central processing unit 80. . Then, press memory selection switch 6.
0 is held at the left position shown in FIG.
PS1 is determined to be "0" and flag BF is set to "0", and signal PS2 from encoder 82 is determined to be "1" and code signal PN is stored in internal memory M1. And “0” of flag BF
is determined, and the signal PS1 and code signal PN are converted into a pattern code signal PAC representing the desired pattern according to conversion for internal memory. Currently flag CF
Since is "0", all contents of the intermediate memory 86 are cleared, and the code signal PAC reads the start address signal HAD from the start address memory 84, and the start address is set to the address of the intermediate memory 76 specified by the counter C1. Signal HAD is written. After this series of operations is executed,
According to the contents of the memory M1, a signal DN is outputted to the numeric display 58, and the corresponding number of the desired pattern is displayed on the display 58.

Next, in order to combine the patterns in the external memory 14, the memory selection switch 60 is switched from the left position shown in FIG. 2 to the right position and the combination key 56 is pressed.
When the memory selection switch 60 and the combination key 56 are operated, a high level signal PS1 and a high level signal PS3 are outputted to the central processing unit 80.
In the central processing unit 80, the signal PS1 and the signal
PS4 is determined to be "1" and flag BF is set to "1", signal PS3 is determined to be "1", counter C1 is advanced, and flag CF is set to "1". After this, the external memory 14
When the corresponding number of the desired pattern is input, the signal PS2 from the encoder 82 is determined to be "1" in the same manner as described above, the code signal PN is temporarily stored in the memory M1, the state of the flag BF is determined, and the signal is stored in the external memory. conversion is performed. According to this external memory conversion, the signal PS1 and the code signal PN are converted into the pattern code signal PAC representing the desired pattern, and the flag MF is set to "1" and the flag CF is set to "1".
The state of is determined. Since this flag CF is set to "1", the intermediate memory 86 is not cleared, and the code signal PAC causes the start address signal to be sent.
HAD is read out and a leading address signal is sent to the address of intermediate memory 86 specified by counter C1.
HAD is written and flag CF is set to "0".

By repeating the operations and operations described above, a plurality of patterns in both memories 12 and 14 can be combined, and the head address signals HAD related to the combined patterns are temporarily stored in the intermediate memory 86 in the order of combination. Further, as can be understood from the above, the central processing unit 80 controls all of the plurality of patterns sequentially specified and combined by the operations of the input key 54 and the combination key 56 as shown in FIG. Step the flag MF when it belongs to the pattern group.
The flag MF is set to "0" in ST1, and when the second pattern group is included in the combined patterns, the flag MF is set to "1" in ST2.
It is set to . In a state where the pattern in the external memory 14 is included in the plurality of patterns combined as described above, that is, in a state where the flag MF is set to "1", the worker accidentally inserts the memory cassette 64 into the pattern.
, the limit switch 70 detects the separation and transmits the low level signal PS4 to the central processing unit 80.
supply to. The central processing unit 80 determines that the flag MF is "1" and that the signal PS4 is "0" in steps ST3 and ST4 shown in FIG.
A signal that causes the LED 62 to blink is output for the time set by the timer. If the memory cassette 54 is not inserted during the set time, steps ST5 to ST8 shown in FIG. 5 are executed.
That is, the internal counter C1 is reset, the straight stitch head address signal HAD is written to the address of the intermediate memory 86 specified by the counter C1, and the code signal representing the corresponding number of the straight stitch is written to the internal memory M1. memorized and flag BF,
MF and CF are each set to "0". As a result, a plurality of combined patterns are automatically changed to a straight stitch, and even if the memory cassette is removed by mistake, the swing position of the sewing needle 44 and the adjustment position of the feed adjuster are fixed to the position related to the straight stitch. be done.

Next, the operation of forming a combination pattern in which the patterns in both memories 12 and 14 are combined will be explained.

When the start/stop switch 74 is operated to start the sewing machine motor 38, the motor drive control device 36 supplies a high level signal CM indicating motor operation to the central processing unit 80. central processing unit 80
, when the signal CM is determined to be “1”, the sixth
The operation according to the flowchart shown in the figure is started, and first the counter C1 is reset. And the seventh
A data temporary storage routine according to the flowchart shown is executed.

When the data temporary storage routine is started, the contents of the counter C1 are loaded into the internal counter C3, and the start address signal HAD is read out from the address of the intermediate memory 86 specified by the counter C3 in step ST9. It is determined in step ST10 whether the first address represented by HAD is a zero address. In this embodiment, both memories 12,
Head address signal HAD for each pattern in 14
A zero address is not used as an address representing a zero address, and as long as the head address signal HAD relating to a pattern in the combination pattern is determined in step ST10, an address signal representing a zero address will not be determined. Next, in step ST11, it is determined whether the value of the address represented by the start address signal HAD is greater than or equal to the minimum value N of the address represented by the start address signal HAD assigned to the pattern in the external memory 14, When , counter C3 is at step ST.
12. With this advanced counter C3, the head address signal HAD is read out from the next address of the intermediate memory 86 in step ST9, and the head address signal HAD is read out from the next address of the intermediate memory 86 in the same manner as described above.
HAD determination is performed in steps ST10 and ST11, respectively. This step ST9 to
The start address signal read out by the counter C1 as a pattern selection means by executing ST12
After HAD, each head address signal HAD stored in the intermediate memory 86 is sequentially scanned, and it is determined whether each head address signal HAD is a head address signal related to each pattern of the second pattern group in the external memory 14. Ru. Therefore, the central processing unit 80 performs the operation of the scanning means 20 shown in FIG. 1 by executing steps ST9 to ST12.

In step ST11, the start address signal
The value of the address represented by HAD is the minimum value N
If it is determined that the value is above, the internal counter C
4, the head address signal HAD is loaded in step ST13, and the address signal THAD representing an address prepared in advance as the first address of the temporary storage memory 24 is loaded into the internal counter C5 in step ST14. and,
Step 15 is executed, and data is read from the start address of the external memory 14 specified by the counter C4 and written to the address of the temporary storage memory 24 specified by the counter C5. The data read by counter C4 is
At step 6, it is determined whether or not the end data PED is present, and since it is not the end data PED at this stage, both counters C4 and C5 are advanced at step ST17, and step ST15 is executed again according to these counters C4 and C5. . By repeating steps ST15 to ST17, all data of one pattern in the second pattern group related to the head address signal HAD determined to be equal to or greater than the minimum value N in step ST11 is transferred from the external memory 14 to the temporary storage memory. Transferred to 24.
Therefore, the central processing unit 80 operates the data transfer means 22 shown in FIG. 1 by executing steps ST13 to ST17.

When the transfer of all the data of one pattern belonging to the second pattern group is completed, the data processing operation according to the flowchart of FIG. Signal HAD is read from intermediate memory 86, and it is determined whether the value of the address represented by address signal HAD is greater than or equal to the aforementioned minimum value N.
When the value is greater than or equal to the minimum value N, the flag CMF is set to "1" and the address signal THAD is sent to the counter C2.
is loaded and the flag is set when it is smaller than the minimum value N.
CMF is set to "0" and the head address signal HAD is loaded into the counter C2. Thereafter, the state of the flag CMF is determined in step ST18, and when the flag CMF is "1", the counter C2 is
The contents of the counter C2 are supplied to the temporary storage memory 24, and the contents of the counter C2 are supplied to the internal memory 12 when the flag CMF is "0". Data is read from the memory addressed by counter C2. Therefore, the central processing unit 80 operates the memory selection means 26 shown in FIG. 1 by executing steps ST18 to ST20 shown in FIG. Subsequently, the read data is the end data.
It is determined in step ST21 whether or not it is a PED. When it is not the end data PED, the read data is output as stitch data SD to the actuator drive circuit 90 and used for forming each stitch. And timing signal generator 8
The state of the signal TP from 8 is determined and the signal TP
While the flag CMF is "0", the states of the flag CMF, the signal PS4, and the signal CM are sequentially and repeatedly determined in steps ST22 to ST24. Signal TP is "1"
When it is determined that the number of stitches has changed, the counter C2 is advanced and the next stitch data is read out. By repeating the operations described above, the first pattern in the combination pattern is formed.

When the formation of the first pattern in the combination pattern is completed, end data PED is determined in step ST21, and flag THF, which will be described later, is set in step ST25.
It is determined in Under normal conditions, the flag THF is set to "0", so the counter C1
is advanced and the head address signal HAD is read from the address of the intermediate memory 86 specified by its contents, and the contents of the address signal HAD are determined. At this stage, the address signal HAD
Since the content of is not "0", the data temporary storage routine described above is executed again. According to this data temporary storage routine, the second head address signal regarding the second pattern in the combination pattern is
HAD is read out from the intermediate memory 86 by the counter C3 loaded with the contents of the counter C1, and after the second head address signal HAD, each head address signal stored in the intermediate memory 86 is sequentially scanned. All data related to the first pattern belonging to the second pattern group after the pattern is transferred from the external memory 14 to the temporary storage memory 24. This transfer operation is repeated each time the data temporary storage routine is executed for the same pattern unless the pattern stored in the temporary storage memory 24 is formed. Then, in the same manner as the first pattern described above, the stitch data SD is repeatedly output for the second pattern to form the second pattern. Thereafter, when the content of the head address signal HAD read by the counter C1 becomes "0", the counter C1 is reset and the first pattern is formed again.

Start/stop switch 7 to stop pattern formation
4, the motor drive controller 36 starts an operation to stop the motor 38 and supplies a low level signal CM to the central processing unit 80 indicating that the motor is stopped. The signal CM is determined to be "0" in step ST24, the counter C1 is reset, the flag CF is set to "0", and the operation of the flowchart shown in FIG. 5 can be executed.

Now, when the memory cassette 64 is removed when a pattern in the second pattern group is being formed in the combination pattern, the limit switch 70 supplies a low level signal PS4 to the central processing unit 80. At this time,
The flag CMF is set to "1" because the pattern in the second pattern group is formed, and the state of the flag CMF is set at step ST shown in FIG.
Then, the signal PS4 is determined to be "0" in step ST23. Subsequently, the generation of stop instruction data SPD from the temporary storage memory 24 is determined in step ST26, and when the stop instruction data SPD is not generated, an abnormality display code signal regarding the display "FF" indicating an abnormal state is stored in the memory M1. , an abnormality display is performed according to the contents of the memory M1. Thereafter, stitch data regarding the stitch 3 stitches before the last stitch of the pattern stored in the temporary storage memory 24
When SD is read out and the stop instruction data SPD that is paired with it is read out, the occurrence of this data SPD is determined in step ST26, and a motor low speed command is sent from the central processing unit 80 to the motor drive control device 36 in step ST27. Output. As a result, the motor drive control device 36 drives the motor 38 at a constant low speed. Then, in the central processing unit 80, the flag THF is set to "1" by executing step ST28, the above-mentioned abnormality display code signal is stored in the memory M1, and the abnormality display is continued.

When the three stitches are formed from the generation of the stop instruction data SPD and the formation of the pattern when the memory cassette 64 is removed is completed, the temporary storage memory 24
Generation of end data PED from step ST21
The flag THF is determined to be "1" in step ST25, and the flag THF is determined to be "1".
is set to "0" in step ST29,
A motor stop command is output from the central processing unit 80 to the motor drive control device 36 in step ST30. As a result, the power supply to the motor 38 is cut off, and the sewing needle 44 stops at a predetermined upper position. Then, in the central processing unit 80, the counter C1 is reset and the flag CF is set to "0", making it possible to execute the operation according to the flowchart of FIG. Therefore, the central processing unit 80 performs the operation of the stopping means 34 shown in FIG. 1 by executing steps ST25 to ST30.

As described above, in this embodiment, when the memory cassette 64 is removed while the sewing machine is stopped and the patterns in the external memory 14 are combined, the abnormal condition is detected by blinking the LED 62 for a predetermined period of time. The pattern in the external memory 14 is automatically changed to a straight stitch only when the abnormal condition is not resolved by installing the memory cassette 64. Therefore, even if the memory cassette 64 is erroneously removed, destruction of the combination pattern can be prevented as much as possible, which is advantageous in improving the ease of use of the sewing machine. Furthermore, even if the memory cassette 64 is accidentally removed while the sewing machine is stopped, the pattern is automatically changed to a straight stitch, which is the most frequently used practical pattern, in response to the removal, so the pattern can be selected after removal. This reduces the need for rework and improves the ease of use of the sewing machine. Furthermore, since the straight seam is formed at a position where there is no risk of collision with sewing tools such as a presser foot or attachments such as a side cutter, the sewing machine is excellent in safety.

The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the spirit thereof.

[Effects of the Invention] As is clear from the detailed description above, the present invention provides a combination pattern composed of a pattern in the first pattern group of the internal memory and a pattern in the second pattern group of the external memory. The second pattern that was first determined by the scanning device after the pattern selected by the pattern selection device in
All data regarding one pattern in the pattern group is stored in a temporary storage memory in the sewing machine frame, and the pattern in the first pattern group is formed according to the data from the internal memory, and the second pattern group is formed in accordance with the data from the internal memory. The inner pattern is formed according to the data from the temporary storage memory, and when the external memory is accidentally removed, the formation of the pattern in the second pattern group is completed and the sewing machine is stopped. Therefore, even if the external memory is accidentally removed from the sewing machine frame, the swing position of the sewing needle and the set position of the feed adjuster are determined by the data from the temporary storage memory, and collisions between the sewing needle and the sewing tool are prevented. can be reliably prevented.
When the external memory is removed, the sewing machine automatically stops after the formation of the patterns belonging to the second pattern group is completed, so the pattern that was formed when the external memory is removed does not collapse, and the sewn product remains unchanged. Damage can also be prevented. Moreover, the temporary storage memory has a relatively small capacity that stores only data related to one pattern in the second pattern group that is first determined by the scanning means, so it does not require a special large capacity for the control circuit of the electronic sewing machine. There is no need to increase capacity memory.

[Brief explanation of drawings]

FIG. 1 is a drawing showing the basic configuration of an embodiment of the present invention, FIG. 2 is an external view of the sewing machine of this embodiment, and FIG. 3 is an enlarged cross-sectional view showing a state in which a memory cassette is installed.
FIG. 4 is a block diagram showing the electrical configuration of this embodiment, FIGS. 5 to 7 are flowcharts for explaining the operation of the central processing unit, and FIG. 5 is an operation when the sewing machine motor is stopped. FIG. 6 is a flowchart for explaining the operation of the sewing machine motor during operation, and FIG. 7 is a flowchart for explaining the data temporary storage routine. 10: Sewing machine frame, 12: Internal memory, 14:
External memory, 16: Pattern combination means, 18: Pattern selection means, 20: Scanning means, 22: Data transfer means, 24: Temporary storage memory, 26: Memory selection means, 30: Control means, 32: Memory attachment/detachment detection means , 34: Stopping means, 80: Central processing unit, C
1: Internal counter, ST1 to ST30: Steps.

Claims (1)

[Scope of Claims] 1. An internal memory provided within the sewing machine frame and fixedly storing data regarding a first pattern group consisting of a plurality of predetermined patterns; an external memory that permanently stores data regarding a second pattern group consisting of a plurality of patterns different from the patterns in the first pattern group; and a designation member that can be manually operated to specify a desired pattern in both the pattern groups. a pattern combination means for combining and storing pattern designation information corresponding to the designated pattern in the order designated by the designation member; and a plurality of patterns stored in the pattern combination means during operation of the sewing machine. pattern selection means for selecting pattern designation information corresponding to each pattern in the pattern in accordance with the designation order, reads data related to the selected pattern designation information from both memories, and sews according to the data. A sewing machine that operates a pattern forming means to form a pattern, comprising: a temporary storage memory provided within the sewing machine frame and having a storage capacity capable of temporarily storing data related to one pattern; sequentially scanning each pattern designation information combined after the pattern designation information selected by the pattern selection means among the plurality of pattern designation information, and determining whether each pattern belongs to the second pattern group; a scanning means; a data transfer means for reading data regarding one pattern first determined by the scanning means to belong to the second pattern group from the external memory and writing it into the temporary storage memory; Either the internal memory or the temporary storage memory is used as a memory for storing data to be supplied to the eye forming means, and whether the pattern selected by the pattern selection means belongs to the first pattern group or not. memory selection means that selects a memory by determining the temporary storage memory; detection means that detects that the external memory is removed from the sewing machine frame while the temporary storage memory is selected; and detection means that detects that the external memory is removed from the sewing machine frame. and a stop means for automatically stopping operation of the sewing machine in connection with reading out all data in the temporary storage memory when the temporary storage memory is read out.