JP2003311061A - Sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewing machine wherein the workability of the adjusting work for a thread tension can be improved. <P>SOLUTION: This sewing machine (1) is equipped with a thread tension- adjusting means (20), an input means (40), a control means (10) and a display means (30). In this case, the thread tension-adjusting means (20) adjusts the thread tension which is imparted to a needle thread. The input means (40) inputs a thread tension value in respective sewing processes so that sewing corresponding to a sewing pattern constituted of a plurality of sewing processes may be performed. The control means (10) controls the driving of the thread tension-adjusting means based on the thread tension value which is input by the input means. The display means (30) displays a plurality of the sewing processes for the sewing pattern in one image using characters or figures so that a worker can visually recognize them. Therefore, the worker can simultaneously recognize the thread tension values for all sewing processes by one image, and can quickly change the thread tension value by the input means which is provided for respective sewing processes when required. Thus, the workability for the adjusting work of the thread tension can be improved. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine having a thread tension adjusting means for adjusting the thread tension applied to a needle thread.

[0002]

2. Description of the Related Art In a general sewing machine, an operator selects a desired sewing pattern from a plurality of sewing patterns stored in advance through an operation panel and sets various sewing patterns selected. The sewing data (for example, the thread tension value, the needle drop position, the sewing length, the number of stitches, the differential amount, etc.) is confirmed, and the sewing data is changed as necessary to perform the sewing operation.

For example, Japanese Patent Laid-Open No. 2001-170 shown in FIG.
Buttonholing sewing machine 1 disclosed in Japanese Patent No. 385
00 is a needle bar 102 provided with a sewing needle 101, a looper base 103 provided with a looper, a balance 104 for supplying the needle thread Y1 to the sewing needle 101, a needle thread tension device 105 for adjusting the thread tension applied to the needle thread Y1, A looper thread tension device 106 for adjusting the thread tension applied to the looper thread Y2, a needle bar vertical drive mechanism 107 for vertically moving the needle bar 102, and a looper base 103.
Mechanism 10 for rotating the needle bar 102 in synchronization with the rotation of the needle
8. An operation panel 200 (see FIG. 6) for setting / changing sewing patterns and various sewing data is provided.

The operation panel 200 has a needle thread tension device 105.
And a thread tension setting section 201 for setting the thread tension to the needle thread Y1 and the looper thread Y2 by the looper thread tension device 106. This thread tension setting section 201 is a setting portion selection section for setting the thread tension. 202, reference thread tension input section 20
3. An individual thread tension input section 204 is provided. The setting portion selection unit 202 is provided with a key 202a corresponding to each portion constituting the sewing pattern selected by the operator (for example, eyelet buttonhole stitch), and the operator selects the predetermined key 202a. To set / change the thread tension value of the corresponding part.

The reference thread tension input section 203 includes a reference thread tension display section 203a and a reference thread tension display section 2 for displaying a reference thread tension value preset for the selected sewing pattern.
03a for displaying the thread tension value of the needle thread Y1 or the thread tension value of the looper thread Y2 is displayed on the reference needle thread key 203b / reference bobbin thread key 203c and the reference thread tension display section 203a. Up key 203d / down key 203e for changing the thread tension value are provided.

The individual thread tension input section 204 is for changing the thread tension value at each portion constituting the sewing pattern selected by the set portion selection section 202, and is a portion thread for displaying the thread tension value of the selected portion. Upper thread key 204b / lower thread key 204c for selecting whether to display the thread tension value of the needle thread Y1 or the thread tension value of the looper thread Y2 on the tension display section 204a and the section thread tension display section 204a. An up key 204d / down key 204e for changing the thread tension value displayed on the thread tension display portion 204 is provided. Then, the operator operates the operation panel 200 to adjust the thread tension values of the needle thread Y1 and the looper thread Y2 in each portion of the sewing pattern, thereby adjusting the thread tightening condition for each needle,
The sewing work is performed according to the sewing location.

[0007]

However, as described above, in order to adjust the thread tension value for each sewing process of each portion constituting the sewing pattern, the operator first sets the setting portion selection section 202 of the operation panel 200. The key 202a is operated to select a predetermined portion of the sewing pattern, and then the portion thread tension display portion 20
After recognizing the thread tension value set for the selected portion from the thread tension value displayed in 4a, the up key 20
Since the thread tension value is adjusted by operating the 4d / down key 204e, many operations are required for the adjustment work, which is complicated.

In particular, when performing adjustment work on a plurality of parts, there is a problem that the work becomes more complicated because it is necessary to repeat the above-mentioned operation. In particular, when it is desired to refer to the thread tension value set for one part in the adjustment work of the other part, the adjustment work of the other part is once terminated, and the part to be referred to from the setting part selection unit 202 is newly changed. Since it is necessary to select and display the thread tension value on the partial thread tension display portion 204a, there is a problem that the work of adjusting the thread tension takes time and the workability deteriorates.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sewing machine which takes into account the above problems and can improve the workability of the thread tension adjusting work.

[0010]

In order to solve the above problems, the invention according to claim 1 provides a thread tension adjusting means (20) for adjusting the thread tension applied to the needle thread introduced into the needle bar. ,
Input means (40) for inputting a thread tension value in each sewing step for performing sewing corresponding to a sewing pattern composed of a plurality of sewing steps, and thread tension based on the thread tension value input to the input means. A sewing machine (1) comprising: a control means (10) for controlling the drive of an adjusting means, wherein characters or figures are used so that an operator can visually recognize a plurality of sewing processes that form the sewing pattern. The display means (30) for displaying on one screen is provided, and a plurality of the input means are provided corresponding to each sewing process.

According to the first aspect of the present invention, a plurality of sewing processes that form a sewing pattern are displayed on one screen of the display means by characters or graphics, and input means for inputting the thread tension value is provided for each sewing process. Correspondingly, a plurality is provided. Therefore, the operator can simultaneously recognize the thread tension values of all sewing processes on one screen,
If necessary, the thread tension value can be promptly changed by the input means provided for each sewing process, so that the workability of thread tension adjustment work can be improved.

According to a second aspect of the present invention, in the sewing machine according to the first aspect, the display means displays the thread tension value in the vicinity of each of the sewing steps displayed in characters or figures. Characterize.

According to the second aspect of the present invention, the same effect as that of the first aspect can be obtained, and the thread tension value is displayed in the vicinity of each of the sewing steps displayed in characters or figures. It is possible to easily recognize to which sewing process the thread tension value displayed on the display means is set.

The invention according to claim 3 is the invention according to claim 1 or 2.
A sewing machine according to claim 1, wherein the display means, when displaying each sewing process in a graphic form, displays the overall image of the sewing pattern in a graphic form, and a corresponding one sewing process is different from other sewing processes. It is characterized by displaying in.

According to the third aspect of the present invention, the same effect as that of the first or second aspect can be obtained, and the overall image of the sewing pattern is displayed in a graphic form when the display means displays each sewing process in a graphic form. Then, the portion showing the specific sewing process in this figure is displayed in a different color from the portions showing the other sewing processes. Therefore, the operator can visually and easily recognize which sewing process is set for the thread tension value displayed on the display means among the plurality of sewing processes forming the sewing pattern. .

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a sewing machine of the present invention will be described in detail below with reference to the drawings. Since the sewing machine 1 of the present invention uses various known devices such as a needle bar, a looper, a looper base, a balance, a needle bar up-and-down drive mechanism, and a turning mechanism, drawings showing the appearance of these various devices are omitted. .

As shown in the block diagram of FIG.
Is a control means 10, a thread tension adjusting means 20, a display means 30,
It is provided with input means 40, various actuators 50 (stepping motors, solenoid valves, solenoids, sensors, etc.) for operating needle bars, loopers, etc., a display control circuit 60, etc.
The driving of these various devices is controlled by the control means 10.

The control means 10 includes a CPU 11 (Center).
al Processing Unit), storage means 1
ROM as 2 (Read Only Memory)
y), RAM (Random Access Memo)
RY) and EEPROM (Electrically Erasable and
Programmable ROM).

The ROM stores various control programs for controlling the drive of the sewing machine 1, control data used in the control programs, and the like. The sewing data indicates, for example, a reference value (reference thread tension value) preset as a thread tension value applied to the needle thread and the looper thread, and a correlation between the current supplied to the thread tension adjusting means 20 and the thread tension. It consists of data, needle drop position coordinates, sewing length, number of stitches, sewing pitch, operation amount, and so on. The data showing the correlation between the supply current and the yarn tension can be obtained by an experiment.

Each sewing pattern is composed of a plurality of necessary sewing data among these sewing data. A number (pattern number) is attached to each sewing pattern, and each sewing pattern can be identified by the pattern number. Also, each sewing data has a number (data item number)
Is attached, and each sewing data can be identified by the data item number.

The EEPROM stores a plurality of sewing patterns, sewing data set for each sewing pattern, and the like. The RAM is used as a work area for storing data and the like during various processing operations by the CPU 11, and
The sewing data or the like input / changed via the input means 40 is temporarily stored. The CPU 11 uses a predetermined area of the RAM as a work area, receives signals from the input unit 40 and various sensors, and performs various arithmetic processes according to a control program stored in the ROM, and displays the display unit 30 and the yarn tension adjusting unit. 20, and controls the driving of various devices constituting the sewing machine 1.

The thread tension adjusting means 20 is a device for independently adjusting the thread tension applied to the needle thread introduced into the needle bar and the thread tension applied to the looper thread introduced into the looper. Although the configuration and operation of the thread tension adjusting means 20 are well known, detailed description thereof will be omitted.
Two thread tension imparting devices 21 shown in FIG. 2 are provided for needle thread and looper thread. The yarn tension applying device 21 is joined to the fixed tray 24 by the voice coil motor 22, the pair of movable trays 23 and the fixed tray 24, one end 25a, and the other end 25.
Joined to the movable part 22a of the voice coil motor 22 by b,
The movable plate 23 is generally configured by an operation shaft 25 and the like slidably inserted into the opening 23a.

Further, although not shown, the needle thread is wound from the spool to the movable tray 23 and the fixed tray 24 of the thread tension applying device 21 for the needle thread.
The looper thread is guided from the looper thread winding to the looper through the movable tray 23 and the fixed tray 24 of the thread tension applying device 21 for the looper thread. Has been. The needle thread and the looper thread are held by the movable dish 23 and the fixed dish 24.

The yarn tension applying device 21 is driven by the control means 10
Is controlled by the control means 10. Specifically, the control means 10 sets the data stored in the ROM of the storage means 12 indicating the correlation between the supply current and the thread tension and the operation panel 90 as will be described later. / When the movable part of the voice coil motor 22 is moved by a predetermined amount based on the changed yarn tension value, the operating shaft 25 and the movable plate 23 which are joined to this movable part
Moves in the axial direction of the operating shaft 25 by a predetermined amount. in this way,
By changing the distance between the movable tray 23 and the fixed tray 24, the thread tension applied to the needle thread and the looper thread held by the movable tray 23 and the fixed tray 24 is adjusted.

The liquid crystal display screen 31 shown in FIG. 3 is composed of a liquid crystal display panel and a transparent touch panel overlaid on the liquid crystal display panel, and has a switch figure displayed on the liquid crystal display panel below the transparent touch panel. The switch can be operated by touching the corresponding detection portion. In addition, the touch area that is the detection portion is C
Under the control of the PU 11, the size is changed according to the size and position of the switch graphic displayed on the liquid crystal display panel. Display means for displaying a thread tension value, a schematic drawing of a sewing pattern, and the like are provided above the liquid crystal display screen 31, and below the display means.
The input means 40 for inputting the yarn tension value is provided.
That is, the display unit 30 and the input unit 40 on the liquid crystal display screen 31 constitute the operation panel 90.

The operation panel 90 is connected to the control means 10 via the display control circuit 60, transmits the thread tension value etc. set / changed by the operator to the control means 10, and the control means 10 causes the liquid crystal display screen to be displayed. The screen display of 31 is controlled. To explain the method of setting / changing the thread tension value by the operator, although not shown, first, on the liquid crystal display screen 31, a sewing pattern selection section for selecting a sewing pattern and whether the thread tension for the needle thread is set or not is set. A thread selection section for selecting whether to set a thread tension value for the looper thread is displayed. Then, the operator selects a desired pattern number from the sewing pattern selection section and selects either the needle thread or the looper thread (for example, the needle thread) from the thread selection section.

FIG. 4 shows an example of the sewing pattern selected by the operator, which is a buttonhole BH formed on the material to be sewn.
A left parallel portion 70 and a right parallel portion 71 formed on the left and right of the
It is composed of a first bartacking portion 72 and a second bartacking portion 73 formed above and below the left parallel portion 70 and the right parallel portion 71. In the following description, the steps of sewing the left parallel portion 70 and the right parallel portion 71 are referred to as the left parallel portion sewing step and the right parallel portion sewing step, respectively, and the first bar-tacking portion 72 and the second bar-tacking portion 7 are formed.
The process of sewing 3 is referred to as a first bar-tacking part sewing process and a second bar-tacking part sewing process.

The pattern number or the like selected by the operator via the operation panel 90 is output to the control means 10. And
The control means 10 outputs a signal to the display control circuit 60 on the basis of a predetermined program, and on the liquid crystal display screen 31, each sewing step and each sewing step that form the sewing pattern selected by the operator as shown in FIG. A plurality of input means 40 for setting / changing the preset reference thread tension value and the thread tension value for each sewing process are displayed.

Specifically, on the liquid crystal display screen 31, all the sewing processes (the left parallel part sewing process, the right parallel part sewing process, the first bar-tacking part sewing process, the second bar-tacking part) which form the sewing pattern are formed. A plurality of overall schematic diagrams 80 (hereinafter, referred to as “overall schematic diagram”) of the sewing pattern displaying the (sewing process) are displayed according to the number of sewing processes. Normally, the sewing pattern is composed of four sewing steps, so that the four overall schematic diagrams 80 are displayed. And, in each of the schematic diagrams 80,
A part indicating a specific sewing process (for example, a part 81 indicating a left parallel part sewing process) is a part indicating another sewing process (for example,
The right parallel portion sewing process, the first bar-tacking portion sewing process, and the second bar-tacking portion sewing process are shown in different modes. In the present embodiment, only the portion showing the specific sewing process is displayed in a different color from the portions showing the other sewing processes.

Further, a thread tension value display section 32 is provided above each of the schematic diagrams 80 in the liquid crystal display screen 31.
The tension value of the needle thread set for each sewing process is displayed. In this way, when displaying a specific sewing process, the operator can display the portion showing the specific sewing process in the schematic diagram 80 in a manner different from the other portions, so that the operator can display the thread tension value display unit 32. It is possible to easily visually recognize to which sewing process the thread tension value displayed at is a value set for which of the plurality of sewing processes that form the sewing pattern.

In addition, an arbitrary data item number (for example, P51 for the left parallel part sewing process, P52 for the right parallel part sewing process, and P5 for the first bar-tacking part sewing process) is preset for each sewing process.
5, P56) is set in the second bar-tacking portion sewing process, and the sewing process number display portion 33 for displaying this number (hereinafter, referred to as "sewing process number") is displayed in each thread tension value display portion. It is provided on the upper part of 32. Therefore, from the sewing process number displayed on the sewing process number display portion 33, the operator can select which of the plurality of sewing processes the thread tension value displayed on the thread tension value display portion 32 constitutes the sewing pattern. It is possible to easily visually recognize whether the value is set for the process.

The input means 40 comprises an up key 41 / down key 42, a bar display section 43, and a pointer 43a which moves up and down on the bar display section 43 according to the thread tension value. Then, when the operator touches the up key 41 / down key 42 displayed on the liquid crystal display screen 31, the thread tension value of each sewing process displayed on the thread tension value display section 32 is increased / decreased. And the bar display section 43
The pointer 43a displayed on the screen moves up / down.
It is also possible to directly raise / lower the pointer 43a and change the yarn tension value by moving the pointer 43a up and down without touching the up key 41 / down key 42 and touching the pointer 43a.

Further, since the upper end and the lower end of the bar display portion 43 are set corresponding to the maximum value and the minimum value of the thread tension value that can be set in each sewing process, the operator is required to perform each sewing process. The ratio of the actual thread tension value to the settable thread tension value can be easily grasped visually.
The triangular mark 43b displayed at the substantially central portion in the vertical direction of the bar display portion 43 indicates the position corresponding to the reference thread tension value in each sewing process.

As described above, in FIG. 3, the operator operates the sewing pattern selection section displayed on the liquid crystal display screen 31 to select a desired sewing pattern number from a plurality of sewing patterns, and the thread for the needle thread is selected. Although the display screen of the display means 30 is shown when the thread selecting section is operated to set the tension, it is also shown when the operator operates the thread selecting section to set the thread tension for the looper thread. Similar to FIG. 3, the liquid crystal display screen 31 displays a plurality of entire schematic diagrams 80 of the selected sewing pattern, and a portion showing a specific sewing process is displayed in a mode different from that showing other sewing processes. It Then, the operator operates the up key 41 / down key 42 while watching the thread tension value displayed on the thread tension value display section 32 to perform the thread tension value adjusting operation of the looper thread.

As described above, according to the sewing machine 1 shown in the present embodiment, a plurality of sewing processes which form a sewing pattern are displayed on a screen of the liquid crystal display screen 31 by characters and figures.
Further, input means 40 for inputting the thread tension value is provided corresponding to each sewing process. Therefore, the worker can simultaneously recognize the thread tension values set for all the sewing processes on one screen, and the workability of the thread tension adjusting work can be improved.

Further, since a plurality of sewing processes that form the sewing pattern are displayed in figures, the operator can
The thread tension value set in each sewing process can be easily visually recognized. Further, since a plurality of sewing processes that form the sewing pattern are displayed by characters, that is, the sewing process number, the operator can easily visually check the thread tension value set for each sewing process based on the sewing process number. Can be recognized by.

Further, the thread tension value display section 32 for displaying the thread tension value and the sewing step number display section 3 for displaying the sewing step number are displayed.
3 and the entire sewing pattern The vicinity of the schematic 80, that is, the sewing process number display portion 33 and the entire sewing pattern 80
Since it is provided at a position where the upper and lower sides are sandwiched between and, the operator can easily recognize which sewing process the thread tension value displayed on the thread tension value display section 32 is set to. Further, when the display means 30 displays each sewing process as a figure, the portion showing the specific sewing process in the overall schematic drawing 80 is displayed in a color different from the portions showing the other sewing processes. Therefore, the operator can more easily visually recognize which sewing process the value displayed in the thread tension value display section 32 is, of the plurality of sewing processes forming the sewing pattern. Can be recognized.

The present invention is not limited to the above-mentioned embodiment, but can be appropriately modified within the scope of the present invention. For example, in the above embodiment, the input means 40 is displayed on the liquid crystal display screen 31 having a function as a touch panel, but the input means 40 corresponds to each sewing process displayed on the liquid crystal display screen 31. Provided that, for example,
The input means 40 may be provided independently of the display means 30.

Further, in the above-described embodiment, the plurality of sewing processes forming the sewing pattern are displayed by the figures and the characters. However, the present invention is not limited to this, and only one of the figures and the characters may be displayed. The name of each sewing process (the left parallel part sewing process, the right parallel part sewing process, the first bar-tacking part sewing process, the second bar-tacking part sewing process) may be displayed in characters. Further, in the above-described embodiment, only the part showing the specific sewing process in the overall schematic drawing 80 is displayed in a different color from the parts showing the other sewing processes.
It is only necessary to display a part showing a specific sewing process so as to be distinguishable from a part showing another sewing process. For example, a shade of color may be used, or only a part showing a specific sewing process may blink. It may be displayed.

Further, the structure of the thread tension applying device 21 is not limited to the one shown in the above-mentioned embodiment, and it is possible to electrically adjust the thread tension applied to the needle thread. good. Further, in the above-described embodiment, it is applied to the eyelet sewing machine, but it may be applied to other sewing machines, for example, it is applied to a sewing machine with a button and the thread is sewn in the root thread sewing step and the root winding sewing step. The tension value may be set.
In the above embodiment, the thread tensions of the upper thread and the lower thread are electrically adjusted, but at least the thread tension of the needle thread may be electrically adjusted. For example, the thread tension may be electrically adjusted. In a sewing machine to which an unadjustable bobbin case is applied, only the needle thread side may be applied.

[0041]

According to the first aspect of the invention, a plurality of sewing processes that form a sewing pattern are displayed by characters or graphics on one screen of the display means, and the input means for inputting the thread tension value is used for each sewing. A plurality is provided corresponding to the process. Therefore, the operator can simultaneously recognize the thread tension values of all the sewing processes on one screen, and if necessary, the thread tension values can be quickly changed by the input means provided for each sewing process. The workability of adjustment work can be improved.

According to the second aspect of the present invention, the same effect as that of the first aspect can be obtained, and the thread tension value is displayed in the vicinity of each of the sewing steps displayed in characters or figures. It is possible to easily recognize to which sewing process the thread tension value displayed on the display means is set.

According to the third aspect of the present invention, the same effect as that of the first or second aspect can be obtained, and the overall image of the sewing pattern is displayed in a graphic form when the display means displays each sewing process in a graphic form. Then, the portion showing the specific sewing process in this figure is displayed in a different color from the portions showing the other sewing processes. Therefore, the operator can visually and easily recognize which sewing process is set for the thread tension value displayed on the display means among the plurality of sewing processes forming the sewing pattern. .

[Brief description of drawings]

FIG. 1 is a block diagram showing a structure of a sewing machine shown in this embodiment.

FIG. 2 is a vertical cross-sectional view showing the structure of a yarn tension applying device.

FIG. 3 is a diagram showing an operation panel and characters and figures displayed on the operation panel.

FIG. 4 is a drawing showing an example of a sewing pattern.

FIG. 5 is a diagram showing a configuration of a general sewing machine.

FIG. 6 is a view showing a conventional operation panel.

[Explanation of symbols]

1 sewing machine 10 Control means 20 Thread tension adjusting means 30 display means 40 Input means

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Claims (3)

[Claims] 1. A thread tension adjusting means for adjusting a thread tension applied to a needle thread introduced into a needle bar, and sewing in each sewing step so as to perform sewing corresponding to a sewing pattern composed of a plurality of sewing steps. A sewing machine comprising: an input means for inputting a thread tension value; and a control means for controlling the drive of the thread tension adjusting means based on the thread tension value input to the input means. A sewing machine comprising display means for displaying a sewing process on one screen by using characters or figures so that an operator can visually recognize it, and a plurality of the input means are provided corresponding to each sewing process. . 2. The sewing machine according to claim 1, wherein the display means displays the thread tension value in the vicinity of each of the sewing steps displayed in characters or figures. 3. The sewing machine according to claim 1, wherein, when the display means displays each sewing process in a graphic form, the sewing machine displays an overall image of the sewing pattern in a graphic form, and a corresponding one sewing process is performed. A sewing machine characterized by displaying a process in a manner different from other sewing processes.