JPS6187579A - A sewing machine that can display abnormal conditions with audio - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a sewing machine capable of audibly indicating abnormal conditions, and more particularly to a sewing machine capable of adjusting the audible display and performing GJ inspection easily and quickly.

In the shipping process for conventional sewing machines, various adjustments and inspections are usually made for each sewing machine, such as the amount of work cloth fed by the feed dog, the rotational speed of the sewing machine motor, and the amount of needle vibration for zigzag wefts. be exposed. For this reason, a mode switching means is provided between a test mode for adjusting or inspecting various parts of the Ill Momo-1 sewing machine capable of forming stitch patterns, and for switching between modes by the operation of the sewing machine. By setting the test mode using such mode switching means,
Sewing machines have been devised that operate according to a special program different from the one used to form normal stitch patterns, allowing adjustments and inspections to be made easily and quickly. That is,
For example, when adjusting the feed amount using the feed dog or performing inspections,
By automatically stopping the sewing machine motor when it has sewn a predetermined number of times after starting, and comparing the actual feed amount during that time with the predetermined feed amount, it is possible to easily and easily control the feed amount of the work cloth by the feed thread. It can be quickly inspected or adjusted.

On the other hand, in recent years, an audio output device has been installed to output a voice message regarding an abnormal condition that occurs when setting the normal mode among multiple abnormal conditions that impede frame column formation. 2. Description of the Related Art Sewing machines have been provided that, when operated, display the details of the abnormal state by voice. This type of sewing machine has the advantage that when an abnormality occurs, the details of the abnormality can be specifically grasped by hearing.

Problems to be Solved by the Invention Incidentally, during the shipping process of sewing machines equipped with such audio output devices, adjustments and inspections are made on the sound quality, volume, etc. of voice messages output from the audio output device. In order to generate the voice message, it is necessary to actually set a detection switch for detecting a lightning condition to an abnormal state, which is a cumbersome process and requires a long time for adjustment and inspection.

Means for resolving the problems (11) The present invention has been made in order to solve the problems listed in (11) above, and its gist is to provide a mode switching means and an audio output device. In a sewing machine that has a plurality of abnormalities], the voice message regarding each of the X conditions is sequentially outputted regardless of the occurrence of the abnormal condition I, in relation to the setting of the test mode J by the mode switching means. A control device is provided to operate the audio output device.

In the sewing machine configured as described above, when the sewing machine is set to the operating mode or the test mode by the mote switching means, as shown in the complaint diagram in FIG. The voice 111 callem position is activated and spoken, and a voice message relating to each of the plurality of abnormal conditions is outputted regardless of the occurrence of the abnormal condition.

EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a front view of a household sewing machine that can selectively form many types of stitch patterns. In the figure, the bed part 10'2 has a pillar part 12 standing upright, and the free end part has a head part 14.
An upper arm 16 having an upper arm 16 formed thereon is horizontally supported by the pillar section 12 at its base end. Upper arm 16
A display window 18 is formed on the front surface of the display window 18, and a pattern display section 2 displays a wide variety of stitch patterns that can be formed by the sewing machine, such as straight stitches 1, zigzag stitches, buttonhole stitches, decorative patterns, etc.
0 is set. The pattern display section 20 displays the stitch patterns by displaying pattern figures corresponding to the stitch patterns, and numbers from "00" to "99" are displayed near each of the stitch patterns. A two-digit pattern number is assigned, and by selecting the pattern number corresponding to the desired stitch pattern using the pattern selection key 30 of the operation panel 22 arranged on the front surface of the pillar section 12, the pattern number can be selected. The pattern number is numerically displayed on the display 32, and the selected pattern is sewn. In addition to the pattern selection key 30 mentioned above, the operation panel 22 also includes a switch key for switching between continuous pattern 1st stitch and 1 cycle 17), and for adjusting the feed amount of the work cloth and the needle vibration amount for zigzag stitching. Other operating parts, such as adjustment knobs, and display lamps are provided to display their operating status.

At the lower end of the head 14, there is a sewing needle 40 which is reciprocated up and down and swung in the lateral direction in synchronization with the rotation of the main shaft of the sewing machine (not shown), and a sewing needle 40 which is moved vertically and horizontally by manually operating the presser foot I/bar 42. A presser foot 44 that can be moved to the stomach position and the lowered position is provided. The amount of swing of the sewing needle 40, that is, the needle pendulum, can be adjusted according to the amount of operation of the operation knob arranged on the operation panel 22, but is limited to a predetermined amount that is determined in advance in relation to the selected pattern. be done. Also, on the front of the head 14, there is a start/stop switch 5TSW for starting and stopping the sewing machine and a reverse stitch switch BSW.
is provided. Reverse stitching is performed only while a straight line, skin stitch or zigzag stitch is selected by the pattern selection key 30, and the reverse stitch switch BSW is pressed. Although not shown, a button pole actuating lever (blue lever) is provided at the lower end of the head 14 near the presser foot 44 and is movable up and down. The size of the button placed on a predetermined base plate of the presser foot 44 is automatically detected, and buttonhole sewing is automatically performed according to the size of the button.

On the other hand, on the head portion 10 and near the needle drop point of the sewing needle 40, there is provided a feed dog 46 that feeds the work cloth at a predetermined feed amount by being reciprocally driven in synchronization with the rotation of the main shaft of the sewing machine. It is being The amount of feed of the work cloth by the feed dog 4G can be adjusted in accordance with the amount of operation of the operation knob arranged on the operation panel 22, similar to the needle pendulum described above. Further, the feed dog 46 is lowered into the head portion 10 by moving the feed dog upper and lower knobs (red knobs) not shown to the right, for example, and is raised above the head portion 10 by moving the feed dog to the left. It looks like this.

Next, the main part of the circuit configuration of the sewing machine described in item 1 will be explained based on the block diagram shown in FIG.

In the figure, feed dog sinking detection switch I) S W 1
.

The presser foot rise detection switch DSW2 and the button ball operating lever fall detection switch DSW3 are both provided inside the sewing machine, and the feed sink detection switch DSW
I detects that the feed dog 4G is in a depressed state and supplies a depression signal DF to the central processing unit 48. In addition, the presser foot rise detection switch DSW2. The hokunhole actuating lever lowering detection switch DSW3 detects that the presser foot 44 is in the raised position and that the button ball actuating lever is in the lowered position, respectively, and supplies a raising signal FU and a lowering Nobuo = BD to the central processing unit 48. do.

The frame post selection device 50 is configured to include the pattern selection gear 30, and when the pattern selection gear 30 is pressed [2
When a digit pattern number list is specified, a pattern code PC representing a stitch pattern corresponding to the pattern number is supplied to the central processing unit 48. Further, the mode changeover switch MSW is used to change the operation mode of the sewing machine between an iJ1 normal mode in which stitch patterns can be formed and a test mode for adjusting and inspecting various parts of the sewing machine, and constitutes a mode changeover means. , located inside the sewing machine. This mode changeover switch MSW is an automatic return type, and the mode signal MSW is changed every time it is operated.
is supplied to the central processing unit 48, and its mode signal MS
is launched in the central processing unit 48 and turned on, and when the mode signal MS is then supplied, the latch is released and held in the off state.

Further, the central processing unit 48 is supplied with a reverse stitch signal R3 and a start/stop signal SS from the reverse stitch switch BSW and the start/stop switch 5TSW, and a timing signal TP synchronized with the rotation of the main shaft of the sewing machine from a timing signal generator 52. is being supplied. Both the reverse stitching switch Bsw and the start/stop switch 5TSW are of the automatic return Q' type, and the reverse stitching switch BSW outputs the &J reverse stitching signal R8 while being pressed, and the start/stop switch s - r s w A star 1-/stop signal SS is output every time 1 press is performed.

This star 1 to/stop signal SS is the mote signal M
Similarly to S, it is latched in the central processing unit 48, and O
While it is held in the N state, the latch is released when the start/switch signal SS is supplied next, and the latch is held in the OFF state. Further, the motor drive control device 54 sends a motor control signal CM that does not indicate the operating state of the sewing machine motor 56 to the sound generation control device 58.
A message end signal SCK indicating the end of the voice message is supplied from each of them. The motor control signal CM has two contents: "0-4" and "1", and "0"
"1" represents the stopped state of the sewing machine motor 56, and "1" represents the rotating state of the sewing machine motor 56.

Note that when the motor control signal CM having the content of "O" is supplied, the launch of the star 1-/stop signal SS written in - is canceled.

The central processing unit 48 processes the supplied signals according to a predetermined program, and generates the stitch data generator 60 . Motor drive control device 54. Predetermined signals are supplied to the sound generation control device 58 and the display 32, respectively.

The stitch data generation device 60 includes the central processing unit 48 described in 1.
The start address corresponding to the pattern code PC is supplied from the 52, and the timing signal TP is also supplied from the timing signal generator 52. Based on these start addresses and the timing signal TP, the start address corresponding to the start address is supplied. A series of stitch signals are sequentially supplied to the actuator drive circuit 62 in synchronization with the rotation of the sewing machine main shaft (timing signal TP). That is, the stitch data generation device 60
For example, when the start address is input, it is loaded, and in addition to the loaded content, there is also an address counter (not shown) that counts the timing signal TP, and a sewing counter that corresponds to each stitch pattern that can be sewn. A stitch data mailer (not shown) is provided in which a group of stitch data is stored in advance and is addressed according to the count contents of the address counter, and sequentially outputs stitch data as a stitch signal. The stitch information output from the stitch data memory is supplied to the actuator drive circuit 62. Note that when a series of stitch signals generated based on the designation of one leading address I/Res reaches its end, the end h::: signal is output from the stitch take memory, and the contents of the address counter are or cleared.

The stitch signal signal 1 is composed of a needle position signal SAT, which does not represent the swing position of the pupil side 40, and a j-input signal SF, which represents the feed dragon and feed direction of the work cloth, and the actuator drive circuit 62 uses them. Converts the Kushi position signal 51-T and the feed space SF into analog signals and amplifies the power,
The needle oscillation j
The active feeder 64 is used to change the swinging position of the sewing needle 40 by driving a needle swinging mechanism (not shown), and the feed active feeder 6G is used to position the rotational position of the feed adjuster (not shown) 2. By doing so, the amount and direction of feed of the workpiece cloth by the feed source 4G are changed, and the individual needle positions on the workpiece cloth are sequentially determined by the magnitude of the needle position signal S I-i and the feed signal SF, respectively. A stitch pattern corresponding to the first address is formed.

The motor drive control device 54 is supplied with an operation command signal FS, a stop command signal TS, and a low speed command signal LS from the central processing unit 48, and is also supplied with a start/stop signal SS from the start/stop switch 5TSW. The driving of the sewing machine motor 56 is controlled based on these signals. The motor drive control device 54 includes, for example, a T-type flip-flop,
Each time the start/stop signal SS is supplied, the output level changes, so that driving power is supplied to the sewing machine motor 56 to drive it, or the power supply is stopped and the sewing machine motor 56 is operated so that the sewing needle 40 It is designed to automatically stop when held in the raised position. Further, when the operation command signal FS or the stop command signal TS is supplied from the central processing unit 48, the T-type flip-flop receives these command signals F regardless of the supply state of the start/stop signal SS.
The sewing machine motor 56 is switched according to S or TS.
drive or stop. Note that when the low speed command signal LS is supplied, driving power is supplied so that the sewing machine motor 56 rotates at a predetermined low speed.

The voice generation control device 58 is connected to the leading address ISless memory and the address
Based on the contents of the counter C supplied from the central processing unit 48 or the contents of the counter C, the predetermined start address in the start address memory is The contents of the address counter, which is loaded into the counter and increments at a predetermined period from the value of the first address, are stored in the audio data memory 6.
Output to 8. The audio data memory 68 stores audio data groups SD1., which correspond to the contents of the counter C "○J, rlJ', r2J, and "3". ．． SD2. SD3 and SD4 are stored, and each data of a selected data group among these audio data groups is sequentially called out as an audio signal SG by an atres counter, and is D/A converted via the audio generation control device 58. is supplied to the container 70. When a series of audio signals SG called based on the designation of one start address reaches its end, an end signal is output, the contents of the address counter are cleared, and the message end signal SCK is sent to the central processing unit 48. Supplied. Then, the D/A converter 70 converts the audio signal SG, which is a digital signal, into an analog signal and supplies it to a speaker 74 via an amplifier 72, and the speaker 74 outputs audio corresponding to the specified audio data group. A message is generated.

These sound generation control devices 58. audio data memory 68,
D/A converter 70. Amplifier 72 and speaker 74 constitute an audio output device.

Note that the audio data groups SDI, SD2. SD3 and SD
The voice message generated from the speaker 74 based on 4 is to notify an abnormal state due to an erroneous operation, and the contents are illustrated in Table 1.

The first table display unit receives the pattern code PC from the central processing unit 7I8.
By supplying the display signal DD corresponding to , the two-digit pattern numbers from "00" to "99" are numerically displayed as described above.

Next, the operation of the sewing machine configured as described above will be explained based on flow chart 1 to FIG. 4.

First, when a power switch (not shown) is turned on, step S1 is executed, and the counter C and test flag TSF are turned on.
The content of is set to "0", and the stitch pattern or straight stitch represented by the pattern code PC is set. Subsequently, step S2 is executed, and it is determined whether or not the content of the test i flag TSF is "1". If it is "1", step S3 is executed. However, the test flag T
Since it is reset to "O" in step S1 of "SF&MA" 1, step S4 is executed after step S2. In step S4, the mode selector switch MSW is operated to determine whether the mode signal MS is launched (ON state) or not (○FF state), and if the mode signals M and S are not latched, G-o step S3 is executed, but if the mode signal MS is latched, steps for adjustment and inspection that are different from the normal stitch pattern formation starting from step 85 are executed.

Hereinafter, a case will be described in which the mode changeover switch MSW is operated and Step 35 and subsequent steps are executed in order to adjust and inspect various parts of the sewing machine during the shipping process and the like.

First, in step S5, the content of the eggplant 1 flag TSF is set to "1", and in step S6, it is determined whether the stitch represented by the pattern code NPC is a straight stitch or a straight stitch. If it is not a straight seam, the steps for adjusting and inspecting the voice message from step 37 onwards are executed, but normally the seam is still set as a straight seam in step S], Steps are performed to adjust and check the feed rate of the work cloth.

In step S8, the start address corresponding to the straight stitch is supplied to the stitch data generator 60, and a straight stitch data group is designated from among the many stitch data groups stored in the stitch data memory. Then, in step S9, a low speed command signal LS is supplied to the sage drive control device 54. Next, step 310 is executed to start/
Stosopsisosen 5TSW was manipulated and star 1-/
It is determined whether the SS) is latched (ON state) or not (OFF state), and if it is latched, step Sl] is executed, or if it is not launched, Step S12 is executed. Step S
]2, the mode selector switch MSW is operated again to select the mode signal MS.

It is determined whether the sewing machine has been released (OFF state) or not (ON state), but since the sewing machine has not been adjusted or inspected yet at this stage, steps 36.3B and S9
and the execution of SIO is repeated.

In this state, start/stop switch 5TSW
When is pressed, a start/stop signal SS is supplied to the motor drive control device 54 and the central processing unit 48, and the sewing machine motor 56 is driven to rotate at a low speed so that the sewing needle 40 and the feed dog 46 form a straight stitch. At the same time, it is determined in step SIO that the start/stop signal SS is latched, and then the feed adjustment routine in step S11 is executed. The feed rate adjustment routine is for adjusting the feed rate of the work cloth by the feed dog 46. For example, when the sewing needle 40 has formed 10 straight stitches, the program executes the next step 31.3. In step S13, a stop command signal TS is output to stop the sewing machine motor 5G.

And this. The actual feed amount of the work cloth when 10 straight stitches are formed per stitch is measured, and the feed adjuster is adjusted so that this matches the predetermined feed amount. Note that when the sewing machine motor 56 stops, the launch of the star 1-/stop signal SS is canceled, so during this adjustment, step S12. S6. S8
．． The execution of S9 and S10 is repeated, and if the feed amount is to be inspected again after adjustment, it is sufficient to press the start/stop switch 5TSW again.

On the other hand, when adjusting or inspecting the sound quality, volume, etc. of a voice message informing an abnormal condition, it is sufficient to select a stitch pattern other than straight stitches using the pattern selection key 30. By doing this, in step S6, the model first wave coat P
It is determined that the stitch pattern represented by C is not a straight stitch, and steps 87 and subsequent steps are thereafter executed.

In step S7, the contents of the counter C are reset to "0", and then step S14 is executed to determine whether or not the start/stop switch 5TSW has been pressed, that is, the start/stop signal SS is latched. (ON state) or not (OFF state) is determined. If not latched, step 312
, 36, 37 and S14 are repeated, but when the start/stop switch 5TSW is pressed and the start/stop signal SS is latched, step 3 is executed.
15 is executed. In step 3.15, the stop command signal TS is output, and even though the start/stop signal SS is supplied to the motor drive control device 54, the sewing machine motor 5G is maintained in a substantially stopped state. Subsequently, step 316 is executed, and the contents of counter C are output to the voice generation control device 58. At this time, since the content of the counter C is "O", the voice generation control device 58 loads the first address corresponding to this "O" into the address counter and increments the contents of the address counter from the first address. The audio data group SDI is supplied to the audio data memory 6U8 from among the four types of audio data groups stored in the audio data memory 68.
By specifying and calling , and outputting the audio data as the audio signal SG, the speaker 74 generates an audio method 12 with the content "Please turn the red knob to the left and raise the feed dog." It will be done.

When this voice message ends and the message end signal SCK is supplied from the voice generation control device 58, step S17 is executed next and the contents of the input counter C are advanced from "Oj" to "1". At the same time, it is determined in step 31.8 whether the content of counter C is "4".

Since the content of the power counter C is "1" here, the step 314 is executed again, and it is determined whether the start/stop switch 5TSW has been operated again. If the start/stop switch 5TSW is operated again and the start/stop signal SS is latched, then steps S15', S16 and S17 are executed, and the audio data group corresponding to the content "1" of the counter C is SD
2 is designated, a voice message with the content "Please lower the presser lever" is generated, and the content of the counter C is advanced from "1" to "2".

Similarly, steps 318, 314, 315 . . . until the content of counter C becomes 14''. The execution of Sl6 and S17 is repeated, and the voice data groups SD3 and SD4 are also called out one after another: ``Please lower the blue lever.'' ``Reverse stitching is not possible.''

A voice message with the content -1 is generated.

That is, these steps 314. Sl, 5.316,
S17 and S18 constitute a control device that sequentially outputs voice messages regarding each of a plurality of abnormal states regardless of the occurrence of the abnormal state. By listening to these voice messages, the sound quality and volume are inspected, and parts are replaced or adjusted as necessary. In addition, start/stop switch 5T
If you do not create one SW, step S], 4 is followed by step S12. S6 and S7 are executed, the contents of the counter C are reset to "0", and the voice messages corresponding to the voice data group SDI are generated again in order.

In step S18, the content of counter C is "4".
If it is determined in step S12. S6.
S7. and the execution of Sl/I is repeated. and,
In step S14, when the mode selector switch MSW is operated again and it is determined that the =8-mode signal MS is released or released, the process returns to step S2. At this time, the contents of eggplant 1 to flag TSF are as described in step S5.
Since it is set to "1" in step S2, YES is determined in step S2, and thereafter steps for forming a regular stitch pattern starting from step 33 are executed.

Hereinafter, steps for forming such a normal stitch pattern will be explained. Note that this step is exactly the same as the steps when using a sewing machine normally at home, etc. In that case, step 33 is performed after passing through steps S2 and S4.
The following will be executed:

First, in step S3, it is determined whether the content of the motor control signal CM is "1", in other words, the sewing machine motor 56
It is determined whether or not the sewing machine is rotating, and if it is rotating, a stitch data generation routine for generating stitch data is executed in synchronization with the timing signal IP in step S38. Since the sewing machine motor 56 is stopped at this stage, step S19 is executed.

In step S]9, the start address is output according to the pattern code PC corresponding to the stitch pattern selected by the pattern selection key 3o, and a large number of stitches stored in the stitch data memory of the stitch data generator 60 are output. Specify the corresponding stitch data group from the data group. Next step S2
0 is executed, the start/stop switch 5TSW is operated, and it is determined whether the star h/stop signal SS is latched (ON state) or not (OFF state), and if it is not latched, steps 321 and subsequent steps are performed. The steps related to reverse stitching are executed, but normally the start/stop switch STSW is pressed and the sewing machine motor 56 is driven to rotate 'fr+J'.
, the stitch data of the stitch data group specified in step 19 is output in step S38, and the sewing needle 40 and feed 1'! +46 is activated and a predetermined stitch pattern is formed.

On the other hand, in step S20, if it is determined that the star I/stop signal SS is supplied and latched by one operation of the star 1/stop switch 5TSW, steps 322 and subsequent steps are executed to detect an abnormality caused by an erroneous operation. If there is an abnormality, it is detected and the sewing machine motor 56 is stopped, and an audio message is generated to notify the abnormality.

That is, first, in step S22, it is determined whether the sinking signal ℃DF is being supplied (ON state) or not (OFF state) from the bacterial feeding detection switch D SW ], in other words, the unit knob (red It is determined whether or not the feed dog 46 has sunk into the navel F section]0 by operating i)) to the right. This feed dog 46 must be raised above the head portion 10 when forming a stitch pattern, and if it is raised, there is no abnormality, so next step S2
3 is executed, but if it is sinking, step S2 is executed.
4 and S25 are executed. In step S24, a stop command signal TS is output to stop the sewing machine motor 56 before it is substantially rotated, and in step S25, a command signal corresponding to the content rOJ of the counter C is sent to the voice generation control device 58. The voice message "Please turn the red knob to the left and raise the feed dog" corresponding to the voice data group SDI is output from the speaker 74.
generated from.

In step S23, the presser foot rise detection switch D
Rising signal FU is supplied from SW2 (ON state)
In other words, it is determined whether the presser foot lever 42 is operated upward and the cloth presser foot 4 is held at the raised position. This presser foot 44 must be held in the lowered position when forming the seam pattern, and if it is in the lowered position, it is not a kairai, so step 826 is executed. In some cases,
One step S27 and 328 is executed. In step 327, a stop command signal TS is output, and the sewing machine motor 56 is stopped until it is not substantially rotated, and in step 32B, a command signal corresponding to the content "1" of the counter C is used to control the sound generation. The voice message “Please lower the presser lever” corresponding to the voice data group SD 2 is output to the device 58 and is output to the speaker 74.
generated from.

In step 326, it is determined whether the stitch pattern represented by the pattern code PC is a buttonhole stitch pattern, and if it is not a buttonhole stitch pattern, it is determined that there is no abnormality and steps 82 and subsequent steps are executed again. At this time, since the sewing machine motor 56 is rotationally driven, the content of the motor control signal CM is rl
J, and step 32. is continued until the sewing machine motor 56 stops after forming a series of stitch patterns. The execution of S3 and S38 is repeated.

Further, if it is determined in step S26 that the stitch pattern represented by the pattern code PC is buttonhole stitching,
Next, step 329 is executed, and it is determined whether the buttonhole is activated and the lowering signal BD is supplied from the bar lowering detection switch DSW3 (ON state) or not (OFF state), in other words, the buttonhole operating lever (blue lever) is It is determined whether or not it has been operated to the lowered position. This buttonhole actuating lever must be held at the lowered value r when buttonholing is performed, and if it is in the lowered position, it is not in an abnormal state, so the same process as described above is performed in step S2. S
3 and 338 are repeated to perform buttonhole stitching, but if the buttonhole is in the raised position, steps S30 and S31 are executed. In step S30, a stop command signal TS is output, and the sewing machine motor 56 is stopped before it is substantially rotated, and in step S3
1, a command signal corresponding to the content "2" of the counter C is output to the voice generation control device 58, and a voice message corresponding to the voice data group SD3 "Please lower the blue lever.j is the speaker 74. generated from.

Note that after steps 325, 328 or S31 are executed, steps 319 and subsequent steps are executed again to check whether or not those abnormal conditions have been resolved, and if the abnormal conditions have been resolved, the above-mentioned In step S2. The execution of S3 and S38 is repeated to form a series of stitch patterns.

On the other hand, when the formation of a series of stitch patterns is completed in this way, the sewing machine motor 56 stops, the determination in step S3 becomes No, and steps 319 and subsequent steps are executed, but the start/stop switch 5TSW is not operated again. In this case, following step S20, steps related to reverse stitching starting from step 321 are executed.

That is, first, in step 321, it is determined whether the reverse stitching switch BSW is pressed and the reverse stitching signal R3 is supplied ('ON state) or not (OFF state), and if the reverse stitching signal R5 is not supplied. for,
After step S32 is executed and the stop command signal TS is output, the steps from step 82 onwards are repeated, but if the reverse stitching signal R3 is supplied, step S3
3 is executed. In step S33, it is determined whether the stitch pattern represented by the pattern code PC, that is, the actually formed stitch pattern, is a straight stitch or a zigzag stitch that can be reverse stitched.

If reverse stitching is possible, step S34 is executed without any abnormality, but if reverse stitching is not possible, step S35 is executed, and the content of the counter C is "3".
” is output to the voice generation control device 58, and the voice message “Cannot reverse stitch” corresponding to the voice data group 5DIi is generated from the speaker 74, and then steps 319 and subsequent steps are executed again. Ru.

In step S34, the start address specifying the stitch data group for reverse stitching is output to the stitch data generator 60, and in steps S36 and S37, the low speed command signal LS and the operation command signal FS are outputted to the sewing machine motor. 56 is driven to rotate at a low speed, and similar to step S38, SI block data generation is executed in step S39, the sewing needle 40 and feed guide 46 are operated according to the stitch data of the stitch data group for reverse stitching, and reverse stitching is executed. Then, step 321.S33.S34.

The execution of S36, 337 and S39 is repeated, and when the desired length of reverse stitching is executed and the pressed state of the reverse stitching switch BSW is released, step 332 is executed following step 321, and the stop command signal TS is is output, and the sewing machine motor 56 is stopped. Thereafter, the steps from step 82 as described above are repeated until the power switch (not shown) is turned off.

As described above, in the sewing machine of this embodiment, by setting the operation mode of the sewing machine to the test mode with the mote changeover switch MSW, a straight stitch of only 10 stitches is formed and the workpiece cloth is fed by the feed dog 46. In addition to easily adjusting the amount and inspecting, the test
By pressing the start/stop switch 5TSW after selecting a stitch pattern other than a straight stitch in , a voice message informing the user of the abnormal condition is sequentially generated from the speaker 74 regardless of whether an abnormal condition has occurred. Therefore, the tone quality, volume, etc. of the voice message can be adjusted and inspected easily and quickly, and the working time can be significantly shortened.

Although one embodiment of the present invention has been described above in detail based on the drawings, the present invention may be implemented in other embodiments as well.

For example, in the above-mentioned embodiment, operations are performed to adjust and inspect the feed amount and voice message in the test mode, but in addition to these, or instead of the feed amount, the rotation speed of the sewing machine motor is It is also possible to perform operations for adjusting and inspecting other parts, such as the amount of needle vibration for zigzag stitches.

Furthermore, in the embodiment described above, the present invention is applied to a sewing machine that detects four types of abnormal conditions related to erroneous operation and generates a voice message. Of course, the present invention can also be applied to sewing machines that generate voice messages regarding whether or not continuous pattern stitching is possible, or other abnormal conditions such as thread cutting.

Furthermore, in the above embodiment, four types of voice messages are sent to the start/stop switch 5TSW in the test mode.
-U is generated each time the button is pressed, but it can also be configured so that four types of voice messages are generated successively by pressing the button - times.

Furthermore, although the automatic return type mode changeover switch MSW is adopted as the mote changeover means in the above embodiment, it is possible to use the tool without using a normal ON/OFF changeover type switch or without providing a special switch. There is no problem in switching the operation mode by short-circuiting predetermined terminals. Although it is desirable that such a mower 1 switching means be provided inside the sewing machine, it is not particularly inconvenient to place it outside the sewing machine as long as it cannot be easily operated during normal 4iγ production work. .

Although other examples are not given, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art without departing from the spirit thereof.

As described in detail in ``Effects of the Invention'' 2, according to the sewing machine of the present invention, in connection with the setting of the test mode by the mode switching means, the voice message regarding each of the plurality of abnormal conditions is transmitted regardless of the occurrence of the abnormal condition. Since the messages are output sequentially, it is possible to easily and quickly adjust or inspect the sound quality, volume, etc. of the voice messages during the shipping process, etc., and the working time can be significantly shortened.

[Brief explanation of the drawing]

FIG. 1G is a diagram corresponding to claims of the present invention. FIG. 2 is a front view showing an embodiment of a sewing machine to which the present invention is applied. FIG. 3 is a block diagram showing a main part of the circuit configuration of the sewing machine shown in FIGS. 1, 1, and 2. FIG. FIG. 4 is a flowchart 1 for explaining the operation of the sewing machine shown in FIG. 2. MSW: Mode changeover switch (mote changeover means) Steps S14.15, 16.17, 1.8: Control device

Claims (1)

[Scope of Claims] Mode switching means for switching the operating mode of a sewing machine between a normal mode in which stitch patterns can be formed and a test mode in which various parts of the sewing machine are adjusted or inspected; and a voice output device that outputs a voice message regarding an abnormal condition that occurs when the normal mode is set among a plurality of abnormal conditions that prevent the occurrence of the abnormal condition. 1. A sewing machine capable of audibly displaying abnormal conditions, characterized in that the sewing machine is provided with a control device that operates the voice output device in conjunction with the setting of the test mode by the mode switching means so that the output is sequentially performed regardless of the state of the abnormality.