JPH01129877A - Information indicator in sewing machine - Google Patents

Abstract

PURPOSE: To improve the work efficiency by reading explanation information concerning thread guard operation stored in an information memory out of the information memory and outputting it onto a display when it is detected by a needle thread detecting means that a needle thread is not loaded on a thread supply path. CONSTITUTION: A power switch is turned on and based on the output voltage level of a needle thread detecting signal outputted from a thread detector 65, it is judged whether a needle thread 61 is loaded on the thread supply path from a thread frame 60 to the hole of a sewing needle 6 or not. When the thread is not loaded, based on how-to-use data in a ROM, the item number '1' of these how-to-use data is automatically selected and the item data of 'how to load upper thread' are displayed on a display 9. An explanation sentence concerning how to load the needle thread and an illustration for easily comprehending that explanation sentence are displayed on the display 9. Based on a thread pass signal from a thread pass lever switch, it is judged whether the needle thread 61 is loaded on the thread supply path or not and needle thread loading operation is finished by inserting the needle thread 61 through the hole of the sewing needle 6 while operating a needle thread pass lever 62.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an information display device for a sewing machine, and in particular, when the upper thread is not hung on the thread supply path, the upper thread hook displays explanatory information regarding the operation. Regarding what you choose to do.

[Prior Art] In recent electronically controlled zigzag sewing machines, in addition to straight stitches and zigzag stitches, it is possible to sew various stitches and patterns such as letters, and when a pattern is selected, the number of the selected pattern is displayed. There are also models on the market that display information such as the size and shape on the display.

On the other hand, as a preliminary preparation necessary for sewing, it is necessary to prepare the upper thread by operation, especially when threading the upper thread. When operating this upper thread hook, the thread supply path from the thread spool to the eye of the sewing needle is not displayed on the display, but on a label affixed to the sewing machine body. The order of the thread paths is indicated by arrows with explanatory text or numbers written in ``A''.

[Problem that the invention seeks to solve]

In the above-mentioned conventional electronically controlled zigzag sewing machine, when operating the upper thread hook, instructions are given on the thread supply path from the thread spool for hooking the upper thread to the thread of the sewing needle using a label affixed to the machine. However, with sewing machines that have complicated sewing functions and are downsized, it is not possible to secure enough space for pasting labels. Therefore, especially when the person is a beginner, he or she does not know how to thread the needle, so they cannot understand the instructions based on the label, and each time they take out the user's manual, open the "How to thread the needle" page and explain the instructions. While reading the text, you will need to hang the upper thread from the thread spool onto the thread guide in order/2 and operate the upper thread hook. Therefore, there is a problem in that the needle threading requires a great deal of time to operate.

[Object of the Invention] An object of the present invention is to improve work efficiency by displaying explanatory information regarding the needle thread hooking operation on a display when the needle thread is not hung on the thread supply path. An object of the present invention is to provide an information display device for a sewing machine.

[Means for solving problems]

As shown in the functional block diagram of FIG. 1, the information display device for a sewing machine according to the present invention has an upper thread provided in a thread supply path from a thread supply source to a thread of a sewing needle. an upper thread detecting means for detecting whether or not the upper thread is running; an upper thread hook for hanging at least the upper thread along the thread supply path; When the needle thread detecting means detects that the needle thread is not hung in the thread supply path, the thread hook stored in the information memory reads explanatory information regarding the operation from the information memory and displays the display. and display control means for outputting to the display.

[Effect]

In the information display device for a sewing machine according to the present invention, when the upper thread detecting means detects that the upper thread is not hung on the thread supply path, the display control means detects the needle thread hanging stored in the information memory. reads explanatory information regarding the operation from the information memory and outputs it to the display.

[Effects of the Invention] According to the information display device of the sewing machine according to the present invention, as explained above, when it is detected that the upper thread is not hung on the thread supply path, the upper thread hook is displayed with explanatory information regarding the operation. is displayed on the display, so there is no need to take out the instruction manual and search for explanatory information regarding the needle threader operation, and the needle threader can immediately start the operation, improving the operability and work efficiency of the sewing machine. improves.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows an electronically controlled zigzag sewing machine to which the present invention is applied.

A needle bar vertical drive device, a needle bar swing drive device, and a thread take-up drive device are built into the arm portion l of this sewing machine M, and the needle bar vertical drive device, needle bar swing drive device, and thread take-up drive device are incorporated into the bed portion 2. A feed drive device and a back and forth feed drive device for moving the feed dog back and forth are incorporated, and these needle bar swing drive device and back and forth feed drive device are controlled by a pulse motor 4 controlled by a control device C1.
6 and 47 (see FIG. 8), and the needle bar vertical drive device, take-up lever drive device, and vertical feed drive device are driven by a sewing machine motor (DC motor) 48 (see FIG. 8).

Note that 5 is a needle bar, 6 is a sewing needle, 7 is a presser bar, 8 is a presser foot, 60 is a thread spool, and 61 is an upper thread.

Arm part 1 of this sewing machine M has 120 dots vertically x 6 dots horizontally.
A large liquid crystal display 9 consisting of 40 dots, a start/stop switch 10 for starting or stopping the sewing operation, a threading lever 62 for inserting the upper thread 6I into the eye of the sewing needle 6, and thread tension for the upper thread 61. Upper thread tension dial 11 that can be adjusted from a strong state to a weak state, and a lower thread winder Wl 2 for winding the lower thread around the lower thread bobbin 26.
, an upper thread 61 is connected to the thread supply path from the thread spool 60 to the eye hole of the sewing needle 6.
A thread detection device 65 detects whether or not the needle thread 61 is threaded on the thread supply path from the thread spool 60 through the first thread guide 63 to the next thread guide 64. A tuning fork 69 is provided. As shown in FIG. 3, the upper thread tension dial 11 has a notch formed at approximately the center of its adjustment range, that is, at the position where automatic thread tension is set, and the automatic thread tension switch 3 is operated by this notch.
This automatic thread tension switch 33 is activated by setting the upper thread tension dial 11 to "auto" (O
(N state), outputs an automatic mode switch signal. Furthermore, a thread tension adjustment volume 34 consisting of a potentiometer is connected to the dial shaft 13 of the upper thread tension dial 11, and the thread tension adjustment volume 34 outputs a thread tension signal.

The machine frame 4 of the pillar section 3 stores pattern data (pattern information) regarding the pattern to be sewn, sewing method data (sewing method information) that explains the sewing machine operations associated with sewing the pattern, and usage data regarding the general use of the sewing machine. (How to use information) and the menu key 14, which is used to select the thorny item number when sewing method data or how-to data is displayed, and the increase key 15, which is used to select the thorny item number when sewing method data or usage data is displayed Decrease key 16 for selection, when displaying pattern data, selects the next pattern data, or when displaying item data of sewing method data or usage data, selects the item data if it is composed of multiple page data. pattern/page key 17 to select the next page data if the sewing machine is selected, a speed volume 18 that can change the sewing speed from low to high speed, a feed adjustment volume 19 that can arbitrarily adjust the feed amount of the work cloth, and a sewing needle. A needle swing adjustment volume 20 for arbitrarily adjusting the amount of swing of the needle 6, and a pattern selection switch 21 consisting of a numeric keypad for selecting a desired pattern are provided.

Further, the machine frame 4 of the bed section 2 is provided with a drop feed lever 22 for holding the feed dog in a lowered state during button sewing or sewing, and a jack 24 for connecting a foot controller 23.

As shown in FIGS. 2 and 4, immediately below the sliding plate 25 is an inner hook 2 that accommodates a bobbin thread bobbin 26 made of transparent synthetic resin.
7 is provided, and the outer hook 2 is rotatable around the inner hook 27.
8 is provided. Further, a known bobbin thread remaining amount detection device 30 is provided on the lower surface of the sliding plate 25 and includes a plurality of light emitting elements and light receiving elements arranged in a row in the radial direction of the bobbin thread bobbin 26. Inner pot 27 just below 26
A reflecting plate 29 is provided on the inner surface of the light emitting element to reflect light from the light emitting element toward the light receiving element. The bobbin thread remaining amount detection device 30 outputs a bobbin thread remaining amount signal depending on the degree to which the emitted light emitted from the light emitting element is blocked in accordance with the remaining amount of the bobbin thread wound around the bobbin thread bobbin 26.

The yarn detection device 65 will be explained based on FIGS. 2 and 5 to 7.

The yarn detection device 65 includes a piezoelectric tuning fork resonator 66 that serves as a yarn detection section.
, an oscillation circuit 67 that drives the piezoelectric tuning fork resonator 66 to oscillate, and a rectification amplifier circuit 68 that rectifies and amplifies the output voltage of the oscillation circuit 67.

The piezoelectric tuning fork resonator 66 has a conventionally known configuration, and as shown in FIGS. piezoelectric elements 70 and 71 are fixed, and each piezoelectric element 70 and 7
A first electrode 72 and a second electrode 73 are connected to the outer surface of the electrode 1, respectively. When the needle thread 61 let out from the thread spool 60 is passed through the thread guide 63 and hooked onto the thread guide 64, the needle thread 61 contacts the arm portion 69b of the tuning fork 69 and is bent.

The piezoelectric elements 70 and 71 are made of known thin plates of crystal or Rochelle salt, and the first electrode 72 and the second electrode 73 are grounded via the piezoelectric elements 70 and 71 and the main body of the tuning fork 69.
When a voltage is applied to the electrode 72 and a voltage is applied to the piezoelectric element 70, the piezoelectric element 70 is distorted by electrostrictive action, and the tuning fork 69 vibrates in response to the distortion. 71 is distorted, and a voltage is generated at the second electrode 73.

To explain the oscillation circuit 67, as shown in FIG. 7, the drain of the field effect transistor TRI is connected to a DC +5V terminal via two series resistors R2 and R1, and the branch point between both resistors R2 and R1. A is connected to a first electrode 72, a gate is connected to a second electrode 73 and grounded via a resistor R3, and a source is grounded via a resistor R4.

The drain voltage of the field effect transistor TRI is bias adjusted so that it decreases when the gate voltage increases.

To explain the oscillation effect, when a voltage is applied to the power supply terminal and a voltage is generated in the piezoelectric element 71 due to the vibration of the tuning fork 69 based on the electrostrictive effect of the piezoelectric element 70, the voltage of the first electrode 72 decreases due to a decrease in the drain voltage. As a result, the electrostrictive action of the piezoelectric element 70 weakens, and as a result, the voltage generated by the piezoelectric element 71 decreases, the voltage at the drain increases, and the electrostrictive action of the piezoelectric element 70 becomes stronger. This phenomenon is repeated, and the tuning fork 69 It vibrates at a natural frequency.

A DC superimposed amplitude change signal is output from the drain of the oscillation circuit 67 as an output voltage, and this amplitude change signal has an amplitude change of a predetermined amplitude when the upper thread 61 is not in contact with the arm portion 69b of the tuning fork 69. However, when the upper thread 61 contacts the arm portion 69b of the tuning fork 69, the tuning fork 6
9 is suppressed, the voltage generated by the piezoelectric element 71 decreases, and the drain voltage increases, resulting in an amplitude change signal with a small amplitude.

To explain the above rectifier amplifier circuit, a bypass capacitor CI for cutting the DC component is connected to the drain of the field effect transistor TRI, and the other terminals of the bypass capacitor C'1 are connected to the anodes and cathodes of the two diodes D1 and D2. The cathode of the diode Di is connected to the smoothing capacitor C2 and the smoothing resistor R5,
The anode of diode D2 is grounded. The other terminal of the smoothing capacitor C2 is grounded, and the other terminal of the smoothing resistor R5 is connected to the base of an NPNI transistor TR2 for amplification. Furthermore, the base of the transistor TR2 is grounded via a bias resistor R6, the emitter is grounded via a bias resistor R8, and the collector is connected to the output terminal and to the DC+5V terminal via a bias resistor R7. .

To explain the rectification/amplification effect, the output voltage (amplitude change signal) output from the drain is cut off by the bypass capacitor C1, and then passed through the two diodes D1 and D.
It is half-wave rectified by a rectifier circuit consisting of 2, and a smoothing capacitor C.
After being smoothed by a smoothing circuit consisting of a smoothing resistor R5 and a smoothing resistor R5, and amplified by a transistor TR2, it is outputted from an output terminal as a DC voltage thread detection signal. That is, the output voltage (amplitude change signal) outputted from the oscillation circuit 67 is rectified and amplified by the rectification amplifier circuit 68, and outputted as a plain thread detection signal at the output terminal.

Next, the operation of the yarn detection device will be explained.

As described above, a thread detection signal corresponding to the vibration (amplitude) of the tuning fork 69 is outputted from the output terminal to the A/D converter 74 via the oscillation circuit 67 and the rectification amplifier circuit 68.

That is, when the upper thread 61 is not in contact with the arm portion 69b of the tuning fork 69, the vibration of the tuning fork 69 is not suppressed and its amplitude increases, so that an amplitude change signal with a relatively large amplitude is sent to the A/D converter 74. Output. On the other hand, upper thread 6
1 is hung, the vibration of the tuning fork 69 is suppressed and its amplitude becomes small, so a relatively small amplitude change signal is output to the A/D converter 74, and this amplitude change signal, that is, the thread detection signal The presence or absence of the upper thread 61 can be detected.

Next, the overall configuration of the control system of sewing machine M is shown in Figure 8.
This will be explained based on the block diagram of FIG.

The control system of this sewing machine M consists of a sewing machine control section MC and a display control section DC, and the sewing machine control section MC includes a CPU (central processing unit), ROM (read only memory), and RAM (random access memory). ), and the display control unit DC includes a control unit ff consisting of a CPU 52, ROMs 53 to 57, RAM 58, etc.
It is equipped with c2.

The sewing machine control unit MC is similar to an existing electronically controlled zigzag sewing machine, and will therefore be briefly described.

The following switches and the like are connected to the control device C1 as input signals.

A start/stop switch 10 that outputs start and stop signals, a pattern selection switch 21 that selects a pattern. A/D
A speed volume 18 that outputs a setting speed signal via a converter 38, a feed adjustment volume 19 that outputs a feed position setting signal via an A/D converter 39, and an A/D converter 4.
Needle swing adjustment volume 20 outputs a needle swing position setting signal through 0, and a timing signal is detected by a photo ink club etc. when the needle bar 5 reaches the highest position every cycle of needle bar vertical movement. a timing signal generator 31 that outputs a speed signal for each rotation of the sewing machine motor 48, a speed sensor 32 that outputs a speed signal for each rotation of the sewing machine motor 48, and a bobbin thread remaining amount detection device 30 that outputs a bobbin thread remaining amount signal via the A/D converter 41. , upper thread tension dial 1
an automatic thread tension switch 33 that outputs an automatic mode signal when 1 is set to "auto"; and a thread tension adjustment volume 3 that outputs a thread tension adjustment signal via an A/D converter 42.
4. Presser lever that drives presser bar 7 up and down (path shown)
A presser foot switch 35 is connected to the presser foot switch 35 and outputs a presser bar position signal according to the ascending position and descending position of the presser bar 7.
, a drop feed switch 36 that is connected to the drop feed lever 22 and outputs a feed Sanno operation signal, and a foot controller switch 37 that outputs a start and stop signal each time the foot controller 23 is pressed when the foot controller 23 is set. has been done.

Furthermore, a pulse motor driver 43 that drives a pulse motor 46 for swinging the needle bar, a pulse motor driver 44 that drives a pulse motor 47 for forward/backward feed, and a sewing machine motor driver 45 that drives a sewing machine motor 48 are connected to the control device C1. There is.

The ROM of the control device C1 stores in advance data regarding the amount of swing of the needle bar 5, the amount of feed of the feed dog, and the feed direction for each sewing operation for each of a large number of stitch patterns in correspondence with the pattern number. Based on the pattern data, the selected pattern data, the feed position setting signal from the feed adjustment volume 19, and the needle swing position setting signal from the needle swing adjustment volume 20, the pulse motor 46 for swinging the needle bar and the pulse for forward/backward feeding are activated. A control program for controlling the motor 47 drives the sewing machine motor 48 in response to the set speed signal from the speed volume 18 and the speed signal from the speed sensor 32, and in response to the operation of the start/stop switch 10. Control programs and the like to be controlled are stored.

The RAM of the control device Ct includes various memories that temporarily store the results of arithmetic processing by the CPU, as well as a foot controller flag that is set when the foot controller 23 is connected, and a drive signal that is output to the sewing machine motor 48. an alarm data memory that stores data indicating the presence or absence of a warning and data indicating the content of the warning in pairs when the sewing machine motor 48 does not rotate even though the sewing machine motor 48 is not rotated or when the operator makes a mistake in operating the sewing machine; etc. are provided.

Next, the display control unit DC that performs display control according to the present invention will be explained.

The display control unit DC has an interface 49 and a control device f.
fc2, the menu key 14, the increase key 15, the decrease key 16, the pattern/page key 17, and a threading lever switch that is connected to the threading lever 62 and outputs a threading signal when the threading lever 62 is pushed down. 75
and an A/D converter 7 that converts the needle thread detection signal output from the needle thread detection device 65 into a digital signal.
4 and a display mechanism, which are connected as shown in the figure.

The display mechanism is composed of a display controller 50 and a liquid crystal display 9. The display controller 50 receives desired display data selected by operating each of the input keys 14 to 17 from the control device C2, and displays the display data. At the same time as writing into the display RAM, a display signal corresponding to the display data is output to the display 9.

As shown in FIG. 9, the control device C2 includes a CPU 52, a ROM 53 that is connected to the CPU 52 via a data bus, etc., and stores various control programs, a RAM 5B, and ROMs 54, 55, and 56 that store various display data. It is composed of a ROM 57 that stores warning data.

The ROM 53 stores a control program for upper thread detection control and display control, a control program for controlling the display mechanism, which will be described later.
A program that converts the setting signal into a numerical value based on the wound oscillation amount setting signal from the needle oscillation adjustment volume 20 when the pattern display mode described later is selected, and a program that converts the setting signal into a numerical value based on the feed position setting signal from the feed adjustment volume 19. A program that converts the setting signal into a numerical value, a program that displays the adjustment state with an arrow based on the thread tension adjustment signal from the thread tension dial ti, and a program that converts the setting signal into a numerical value. A program to display the bobbin thread amount based on
Data for displaying "target V", r=-, "8 rounds of thread", "bobbin thread amount", pattern data for thread tension status, thread spool pattern data for displaying bobbin thread amount, etc. are stored.

The ROM 54 stores the item number, the name of the stitch pattern, the shape of the stitch pattern, and the type of presser foot to be used for each of the pattern data (pattern information) of a plurality of patterns on the display 9.
Each dot corresponds to the screen (hereinafter referred to as one page).
It is stored as a numerical value of "l" or "0". The names of the stitch patterns are listed below with item numbers attached.

1. Buttonhole sewing, 2. Straight stitch, 3. Zigzag stitch, 4. Chain stitch, 5. Triple stitch, 6, decorative stitch, 7. Fagoting, 8° overlock stitch, 9. Blind stitch, 10. Shell stitch, 11. Scallop stitch, 12. Overedge stitch,
13. These include kandome stitching, etc.

The ROM 55 stores item numbers, sewing method names, sewing method explanations, and pictures and page numbers (1/ 1, 1/3, etc.) by item number and mark each dot as "1" corresponding to one screen of the display 9.
Alternatively, it is stored as a numerical value of "0". Note that when the explanation of how to sew is long and takes up more than one page, it is divided into a plurality of pages and stored. The names of the sewing methods are listed below with item numbers attached.

■, Buttonhole sewing, 2. Straight stitch, 3. Zigzag stitch, 4. Chain stitch, 5. Triple stitch, 6, decorative stitch, 7. Fagoting, 8° overlock stitch, 9. Blind stitch, 10. Shell stitch, 11. Scallop stitch, 12. Overedge stitch,
13. Kandome stitch, 14. Attaching a zipper, 15. Attaching buttons, 16. Blind stitching, 17. Otoshi sewing machine, 1
8° punch work, 19. This includes overcutting, etc.

Regarding each usage data (usage information) for multiple usages, the ROM 56 contains item numbers, usage names, usage explanations, pictures and page numbers (1/1, 1/3 etc.) by item number and mark each dot as "1" corresponding to one page of the display 9.
” or as a numerical value of “0”. Note that when the usage explanation is long and takes more than one page, it is divided into multiple pages and stored. The usage names are listed below with item numbers.

■, How to thread the upper thread, 2. How to wind the bobbin thread, 3. How to pull out the bobbin thread, 4. Adjusting the thread tension dial, how to replace the 5° presser foot, 6. How to replace the sewing needle, how to install the 7° side cutter, 8. How to replace the lamp, 9. Maintenance and oiling of the sewing machine, etc.

Regarding each of the warning data (warning information) of a plurality of warnings, the ROM 57 stores the contents of the warning, an explanatory text for canceling the warning, and a picture for making the explanatory text easier to understand, classified according to the content of the warning. Each dot is stored as a numerical value of "1" or "0" corresponding to one page of the display 9.

The contents of the warning and an explanatory text for canceling the warning are listed below.

The motor is locked! ! 〉 Please check the causes one by one.

・Is the sewing needle bent or broken?・Is there any thread tangled in the hook?・Is there dirt accumulated around the feed dog? The sewing machine cannot be started because the presser foot is raised! ! 〉 ・Please lower the presser foot and then operate the start/stop switch again. The sewing machine cannot be started because the feed dog is lowered! ! 〉 ・When sewing this pattern, use the feed dog to feed the fabric. ・Slide the drop feed lever to the right and operate the start/stop switch again.

<Foot controller in use! ! 〉・Since a foot controller is used, please start and stop the sewing machine using the foot controller.

etc. will be displayed.

The RAM 5B sequentially has a pattern display mode in which pattern data is displayed on the display 9 by operating the menu key 14, a sewing method display mode in which sewing method data is displayed on the display 9, and a usage display mode in which usage data is displayed on the display 9. A display mode memory that stores the display mode that is cyclically switched and selected, an item number counter that indicates the item number when displaying sewing method data or usage data, and multiple item data of sewing method data or usage data. A display page counter that indicates the page to be displayed when the page is composed of pages, and various memories that temporarily store the results of calculations performed by the CPU 52 are provided.

Next, the upper thread detection control and display control routines performed by the control device C2 of the control section DC of the sewing machine will be explained based on the flowcharts shown in FIGS. 10(a) and 10(b).

When the power switch (path shown) is turned on, upper thread detection control is first started, and the process moves to step 31 (hereinafter simply referred to as 51, other steps are handled in the same way), and the pattern display mode is set in the display mode memory. Then, initial settings such as clearing the item number counter and display page counter are executed, and the process moves to S2. In S2, the thread detection device 65
Based on the output voltage level of the needle thread detection signal output from Move to S3. In S3, switch the screen and
Based on the usage data in ROM 56, item number ``1'' of this usage data is automatically selected, and ``How to thread the upper thread'' is selected.
The item data is displayed on the display 9. for example,
As shown in FIG. 11(c), an explanation about how to thread the upper thread and a picture to make the explanation easier to understand are displayed on the display 9. In the next step 84, it is determined whether or not the upper thread 61 is hooked on the thread supply path based on the threading signal from the threading lever switch 75, and the threading lever
2 to insert the needle thread 61 into the eye hole of the sewing needle 6, and when the needle threading operation is completed, it is determined as Yes, and the process moves to S5.

In S5, based on the display mode, item number counter, and display page counter data in the display mode memory, "
The data that was displayed immediately before displaying the data "How to thread the upper thread" is displayed, and the process moves to S6.

In S6, data in the alarm data memory of the RAM of the control device C1 is searched. Then, in the next step 87, it is determined whether or not there is a need to display a warning based on the data indicative of the presence or absence of a warning in the alarm data memory, and if there is no need to display a warning, the process moves to S8. In S8, it is determined whether or not the pattern display mode is selected based on the data in the display mode memory, and if the pattern display mode is selected, the process moves to S9.

In S9, pattern data such as "v~'", "r-", "thread tension", and "bobbin thread amount" are read from the ROM 53 and displayed on the display 9. At 310, stitch width amount data is read based on the needle swing position setting signal from the needle swing adjustment volume 20, feed pitch amount data is read based on the feed position setting signal from the feed adjustment volume 19, and the thread Thread tension data is read based on the thread tension adjustment signal from the tension dial 11, and bobbin thread amount data is read based on the bobbin thread remaining amount signal from the bobbin thread remaining amount detection device 30.

In Sll, all the read data is displayed at a predetermined display position on the display 9, and the process returns to S2. For example, as shown in FIG. 11(a), item number "1",
The name of the seam pattern ``buttonhole'', the shape of the seam pattern,
The type of presser foot to be used is displayed on the display 9, as well as the swing width value ``5'' and the feed pitch value ``3''.
, the thread tension adjustment state (arrow display position), and the bobbin thread amount are displayed at predetermined display positions on the display 9, respectively. Note that when the thread tension dial 11 is set to "auto", rAUTo is displayed as the thread tension adjustment state by the automatic mode signal from the automatic thread tension switch 33. In addition, N at S8
If it is determined as o, the process returns to S2.

Here, when the pattern/page key 17 is operated to display the next stitch pattern, the next 31st stitch pattern will be displayed via S2 and S12.
3, it is determined Yes and the process moves to 314.

In step 314, it is determined whether or not the pattern display mode is selected based on the data in the display mode memory, and if the pattern display mode is selected, the process moves to step 315. In S15, the data of the item number counter is incremented, and in 316, the pattern data corresponding to the item indicated by the item number counter is displayed, and the process moves to S6. Then, 36~Sit is executed,
There is no need to display a warning, and when the swing width amount, feed pitch, etc. are changed, the latest setting state after the change is displayed on the display 9, and the process returns to S2. Next, when the menu key 14 is operated to display the sewing data, it is determined as Yes in S12 via S2, and 317
Move to.

At 317, the item number counter and display page counter are cleared. At 31B, the next display mode is set based on the data in the display mode memory. That is, when in the pattern display mode, the next sewing method display mode is set, when in the sewing method display mode, the next usage display mode is set, and when in the usage display mode, the next pattern display mode is set.

In S19, it is determined whether the pattern display mode is selected, and if the answer is No, the process moves to S20, and the currently selected display mode (sewing method display mode or usage display mode) is selected based on the sewing method data in the ROM 55 or the usage data in the ROM 56. The data of the first page of the first item of the sewing method data or usage data corresponding to the mode) is displayed, and the
l is executed and the process returns to S2. For example, when the sewing method display mode is selected, the item number "1", the name of the invention "buttonhole stitching", and
An explanation of how to sew, a picture to make the explanation easier to understand, and a page number are displayed.

In addition, when the usage display mode is selected, as shown in Fig. 11(c), the item number "l", the usage name "how to thread the upper thread", the usage explanation, and the explanation are displayed. Pictures and page numbers are displayed to make it easier.

When the sewing method display mode or the usage display mode is selected and the increase key 15 is operated to display the data of the next item, S2, S12,
After passing through S13, it is determined Yes in 521, and the process moves to 322.

In S22, it is determined whether or not the pattern display mode is selected, and if the sewing method display mode or the usage display mode is selected, the process moves to 323. In S23, the item number counter is incremented, and in S24, the display page counter is cleared.

At 325, the data of the first page of the item data indicated by the item number counter of the sewing method data or usage data corresponding to the currently selected display mode (sewing method display mode or usage display mode) is displayed. S
ll is executed and the process returns to S2. For example, when the sewing method display mode is selected and "1. Buttonhole stitching" is displayed, the next "2. Straight stitch" is displayed, and when "2. Straight stitch" is displayed, Next “3
．． "Zigzag stitch" is displayed, and the item number and name of the sewing method are displayed in the same manner. Also, when the usage display mode is selected and "1. How to wind the upper thread" is displayed, the next "2. How to wind the bobbin thread" is displayed, and "2. How to wind the bobbin thread" is displayed. When "How to pull out the 3° bobbin thread" is displayed, the next "How to pull out the 3° bobbin thread" is displayed, and the item number and name of how to use are displayed in the same manner.

When the decrease key 16 is operated to display the data of the previous item when the sewing method display mode or the usage display mode is selected, S2.312
・After passing through steps 313 and 321, it is determined Yes in S26, and S
Move to 27.

In S27, it is determined whether or not the pattern display mode is selected, and if the sewing method display mode or the usage display mode is selected, the process moves to 52B. At 32B, the item number counter is decremented and the process moves to S24, and from 324 to S
25. Return to S2 via S6-Sit. That is, the data of the first page of the previous item data is displayed in the reverse order of when the index key 15 was operated. Furthermore, S2
2 or when it is determined Yes in S27, the process moves to S6.

When the sewing method display mode or usage display mode is selected and the displayed item data consists of multiple pages, press the pattern/page key 17 to display the page data of the next page. When operated, it is determined Yes in 313 via S2 312, and the process moves to 314. In S14, the determination is No, and in S29
Move to. In S29, it is determined whether there is next page data based on the data of the display page counter,
If there is next page data, the process moves to S30. S
At 30, the display page counter is incremented;
At 331, the page data indicated by the display page counter is displayed, and the process moves to S6.

Further, when the menu key 14 is operated and the determination is Yes in S12 and the pattern display mode is selected in the display mode memory in steps 517 to 31B, the determination is Yes in 319 and the process moves to S32. 332~S3
5 is a routine for displaying the latest swing width, feed pitch, etc., and in S32, the data of the first item of pattern data is displayed on the display 9 based on the pattern data in the ROM 54 and the data in the item number counter. S33-S35
are the same as S9 to Sll, so their explanation will be omitted.

On the other hand, when the sewing machine motor 48 and others are controlled by the control device C1, for example, if the sewing machine motor 48 is not driven to rotate even though the start/stop switch 10 is operated to drive the sewing machine motor 48. In this case, the control device c1 determines that the sewing machine motor 48 is locked based on the timing signal from the timing signal generator 31 and the speed signal from the speed sensor 32, and stores data indicative of the presence or absence of a warning in the alarm data memory. and data indicating the warning contents are written. At this time, in S7, the determination is Yes and the process moves to 33G.

In S36, data indicating the content of the warning is read from the alarm data memory. In S37, the display screen is switched, and display data of the warning content corresponding to the data indicating the warning content based on the warning data in the ROM 57 is displayed on the display 9. In 33B, it is determined whether or not the warning has been canceled, and the warning is canceled. If not, 33B is repeated. For example, as shown in FIG. 11(d), the content of the warning "
Motor is locked! ! " and an explanation for canceling the warning are displayed. Then, when the operator removes the cause of the motor lock based on the explanation and operates the start/stop switch 10 again, the control device CI transfers the data instructing the warning and the data indicating the content of the warning from the alarm data memory. is cleared, the warning is canceled, a Yes determination is made in 338, and the process moves to 339.

339, based on the display mode, item number counter, and display page counter data in the display mode memory,
The data displayed immediately before displaying the warning content is displayed, and the process moves to S8.

Furthermore, regarding S7 and S36 to S37, display examples of other warning contents will be explained.

With presser foot 8 raised, press start/stop switch 1.
0 to drive the sewing machine motor 48,
Based on the needle bar position signal from the presser foot switch 35 and the start/stop signal from the start/stop switch 10, the control device C1 stores data indicating the warning state and data indicating the warning content in the alarm data memory. By writing, the content of the warning ``The sewing machine cannot start because the presser foot is raised!!'' and an explanation for canceling the warning are displayed.

Further, when a pattern involving cloth feeding is selected with the feed dog lowered and the start/stop switch 10 is operated, the control device C1 receives the feed Sanno operation signal from the drop feed switch 36 and the start/stop switch. 10
By writing data instructing the warning status and data indicating the warning content into the alarm data memory based on the start/stop signal from , the warning content "The sewing machine cannot start because the feed dog is lowered!!"" and an explanation for canceling the warning are displayed.

Note that a plurality of yarn detection devices 65 may be provided in the yarn supply path.

The display of the data for "how to thread the upper thread" may be cleared by operating the start/stop switch 10 to start sewing, or by operating any of the keys 14 to 17. It may also be erased.

As explained above, data related to patterns, data related to sewing methods, or general instruction data related to how to use the sewing machine are selected by operating the keys 14 to 17 and displayed on the display 9, thereby improving the operability and work efficiency of the sewing machine. improves.

Particularly, when the upper thread 61 is not hung in the thread supply path, an explanatory text and a picture ``How to hang the upper thread'' are displayed on the display 9, so that the work of hanging the upper thread can be made more efficient.

[Brief explanation of the drawing]

Figure 1 is a functional block diagram showing the configuration of the present invention, Figures 2-
Fig. 11 shows an embodiment of the present invention, Fig. 2 is a perspective view of an electronically controlled zigzag sewing machine, and Fig. 3 is an explanatory diagram illustrating a configuration for outputting a thread tension signal set with a thread tension dial. , FIG. 4 is a vertical sectional side view of the main parts of the horizontal hook and bobbin thread bobbin, FIG. 5 is a partial perspective view of the sewing machine, and FIG. 6 is a partial perspective view of the sewing machine.
7 is a circuit diagram of the thread detection device, FIG. 8 is a block diagram of the control system of the sewing machine, FIG. 9 is a block diagram of the control device for display control, and FIG. 1O (a) and (b) ) is a flowchart of the upper thread detection control and display control routine,
FIGS. 11(a) to 11(d) show examples of displaying pattern data, sewing method data, usage data, particularly data related to "how to thread the upper thread," and warning data, respectively. M... Sewing machine, 9... Liquid crystal display, 52...
CPU, 56... ROM, 60... Thread piece, 61
...Upper thread, 65.. Thread detection device, 66.. Voltage tuning fork resonator, 67.. Oscillation circuit, 68.. Rectification amplifier circuit,
69...Tuning fork, C2...Control device, D...Display mechanism. Patent applicant: Brother Industries, Ltd. Figure 1 Figure 2 Figure M Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] (1) Needle thread detection means is provided in the thread supply path from the thread supply source to the eye of the sewing needle and detects whether or not the needle thread is hung on the thread supply path; an information memory storing explanatory information regarding an upper thread threading operation for threading along the upper thread; a display provided on the sewing machine body for displaying information; and a display device provided on the sewing machine body for displaying information; 1. An information display device for a sewing machine, comprising display control means for reading explanatory information regarding a threading operation stored in an information memory from the information memory and outputting it to a display when it is detected that the threading operation is not performed.