JPH06154455A - Sewing machine with comparing function for bobbin thread residual/necessary amount - Google Patents

Abstract

PURPOSE:To equip a sewing machine with a bobbin thread residual amount/ necessary amount comparing function which can make a warning indication when the residual amount has become smaller than the necessary amount by performing comparison of the residual amount with the necessary amount for each sewing pattern when patterning takes place. CONSTITUTION:One or more patterns are selected by a pattern selecting means 2, and the actual bobbin thread residual amount wound on a bobbin thread holding means sensed by a sensing means 5 is compared by a bobbin thread residual amount/necessary amount comparing means 12 with the necessary amount for each pattern selected. When the actually remaining amount becomes smaller than the necessary amount, a warning indication means 13 gives notice that the bobbin thread is in shortage.

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 lower thread remaining amount / necessary amount comparing function, and particularly to the remaining amount of the lower thread and the lower thread for each pattern pattern to be sewn at the time of performing embroidery sewing. The present invention relates to a sewing machine having a lower thread remaining amount / required amount comparison function for comparing the required amount and notifying when the remaining amount of the lower thread is insufficient.

[0002]

2. Description of the Related Art Conventionally, sewing machines capable of detecting the remaining amount of lower thread have been commercially available.

In this sewing machine, the remaining amount of the bobbin thread remaining in the bobbin thread holding means mounted on the sewing machine is detected,
A warning could be issued when the remaining amount became less than the planned amount.

[0004]

However, this merely monitors the remaining amount of the lower thread and issues a warning, and has no relation to the selected pattern, so that the following problems occur.

(1) In a plurality of combination patterns or continuous patterns that are arbitrarily selected and combined, a bobbin thread remaining amount warning is displayed during sewing of the patterns, and if the embroidery sewing is continued, the pattern is Except when the separation between the stitches is good,
The bobbin thread needs to be replaced during the pattern formation. When the bobbin thread was replaced during the pattern formation, it was necessary to read the pattern data backward and sew again, which complicated the work. Also, at this time, it is extremely difficult to actually finish the embroidery sewing to a uniform finish.

(2) Further, if the bobbin thread replacement time is early, a large amount of the bobbin thread remains and waste occurs.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to select one or a plurality of combined patterns which are arbitrarily selected from the pattern data storage means mounted on the sewing machine, or a continuous pattern. When forming a pattern, the remaining amount of lower thread and the required amount of lower thread are compared for one or more remaining patterns for each pattern pattern, and the remaining amount of lower thread indicates the required amount of lower thread for the next pattern. The present invention is to provide a sewing machine having a lower thread remaining amount / necessary amount comparison function that is capable of issuing a warning when there is a shortage.

[0008]

In order to achieve the above-mentioned object, the present invention selects an arbitrary pattern from a plurality of patterns stored in advance and, when automatically sewing, selects the remaining amount of the bobbin thread. In a sewing machine having a lower thread remaining amount / necessary amount comparison function for notifying the shortage of the lower thread, a lower thread remaining amount detecting means for detecting the actual remaining amount of the lower thread wound around the lower thread holding means, and a lower thread Lower bobbin thread required amount comparing means for comparing the remaining amount with the required bobbin thread required amount for each selected pattern pattern, and a notification for insufficiency of the lower bobbin thread remaining amount according to the result of comparison by the lower bobbin thread required amount comparing means. It is characterized in that it is provided with a yarn remaining amount shortage notifying means.

[0009]

According to the present invention, the actual lower thread remaining amount and the lower thread required amount are compared by the lower thread required amount comparing means for each pattern data. At this time, when the actual remaining amount of the bobbin thread is less than the required amount, the fact is notified by the bobbin thread remaining amount insufficiency notifying means. Therefore, it is possible to prevent the lower thread from running out during the sewing of one pattern pattern.

According to the notification, the bobbin thread is replaced at the boundary between the pattern patterns. Therefore, it is not necessary to reversely read the pattern data and perform re-sewing, a complicated work is not required, and the finish of the sewing pattern is improved.

Since the bobbin thread is replaced at an appropriate time, it is possible to minimize the remaining amount of the bobbin thread. Therefore, there is almost no waste of the lower thread.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing a hardware structure of a sewing machine having a lower thread remaining amount / necessary amount comparing function according to an embodiment of the present invention.

In the figure, reference numeral 1 is a pattern data storage means for storing a plurality of preset block data or sewing data (hereinafter, one or both are referred to as pattern data). The pattern data storage means 1 includes, for example, alphabets A, B, C, ..., Numbers 1, 2, 3, 4,
.., stores a plurality of the pattern data such as figures and pictorial diagrams.

Reference numeral 2 is a pattern selecting means, and 3 is a selected pattern storing means for storing one or a plurality of pattern data selected from the pattern data storing means 1 by the pattern selecting means 2. Reference numeral 4 denotes a pattern lower thread amount storage means in which a required lower thread amount corresponding to the pattern stored in the pattern data storage means 1 is stored. The required amount of the lower thread may be stored in the pattern data storage means 1 together with the pattern data. In this case, the pattern lower thread amount storage means 4 is not necessary.

Reference numeral 5 is a bobbin thread remaining amount detecting means for detecting the actual remaining amount of the bobbin thread wound around the bobbin thread holding means such as a bobbin, and 6
Is a lower thread remaining amount storage means for storing the lower thread remaining amount detected by the lower thread remaining amount detecting means 5, and 7 is a lower thread amount required for the pattern selected by the pattern selecting means 2 corresponds to the pattern pattern. This is a required lower thread necessary amount storage means. As the lower thread remaining amount detecting means 5, for example, one disclosed in JP-A-1-126996 can be used.

Reference numeral 8 is a central processing unit (hereinafter, CPU). Reference numeral 9a is a display control unit for displaying a plurality of patterns and various data stored in advance, and 9b is a liquid crystal display unit for displaying the various data.

Reference numeral 10 is a sewing data storage means. Here, when the sewing data (solid data) is stored in the pattern data storage means 1, the sewing data storage means 10 stores the sewing data of the pattern selected by the pattern selection means 2 in the pattern data storage means 1. It is transferred from and stored as is. On the other hand, when the block data is stored in the pattern data storage means 1, the block data of the pattern selected by the pattern selection means 2 is read from the pattern data storage means 1 and calculated by the CPU 8 to sew data. It is stored after being converted to.

Reference numeral 11 is a sewing machine drive system for forming a sewing pattern. Reference numeral 11a is a motor drive control means for driving the drive motor, and 11b is a drive motor for driving the sewing machine needle. Reference numeral 11c is a stepping motor drive control means for driving a stepping motor that moves the sewing point of the sewing machine in two directions (for example, X-Y directions), and 11d is the sewing point of the sewing machine in the first direction (for example, the X direction). An amplitude stepping motor for moving 11e is a feed stepping motor for moving the sewing point of the sewing machine in the second direction (for example, the Y direction).

Reference numeral 12 is a required lower thread amount comparing means for comparing the remaining amount of lower thread wound around the lower thread holding means with the required amount of lower thread for each pattern of the selected pattern. Numeral 13 is a lower thread remaining amount warning display means for displaying a lower thread remaining amount insufficient warning according to the result of comparison by the lower thread necessary amount comparing means 12.

FIG. 3 is an explanatory diagram for explaining a pattern and the definition of the pattern.

As shown in the figure, the pattern 30 is a pattern pattern 31, 32, 33, which is selected by the pattern selecting means 2.
The whole of 34 is shown.

Next, the operation of this embodiment will be described with reference to the flow chart shown in FIG.

First, in step S1, one or a plurality of pattern patterns are arbitrarily selected from the plurality of patterns previously stored in the pattern data storage means 1 by using the pattern selection means 2. The selected pattern is displayed on the liquid crystal display unit 9b.

In step S2, the pattern selected by the pattern selecting means 2 is stored in the selected pattern storing means 3. When a plurality of pattern patterns are selected, they are stored in the order of selection. However, the order may be arbitrarily changed by editing operation means (not shown).

In step S3, the number L of selected patterns, which is the number of pattern patterns selected by the pattern selecting means 2 by the sewing machine operator, is registered. L = 1 when the number of the selected pattern patterns is 1, L = 2 when the number is 2, ..., n
When the number is L, n = n.

In step S4, the number N of pattern patterns is initialized to "1".

In step S5, the remaining amount of the lower thread wound around the lower thread holding means (eg, bobbin) mounted on the sewing machine main body is detected by the lower thread remaining amount detecting means 5. . Here, the detected lower thread remaining amount is X.

In step S6, the required amount of the lower thread required for the entire N-th pattern pattern is read from the required lower thread amount storage means 7, and the read required amount of the lower thread is set to Y.

In step S7, it is determined whether or not the lower thread remaining amount X is larger than the required lower thread amount Y. If X> Y, this determination is affirmative, and the process proceeds to step S8. If not, go to step S20.

In step S8, it is determined whether or not the sewing machine has been started by operating a starting means (not shown) (for example, a start switch, a start button, etc.).
If the sewing machine is started, the determination is affirmative, and the process proceeds to step S9.

In step S9, the Nth sewing data is read from the sewing data storage means 10 and output to the sewing machine drive system 11 for forming the sewing pattern.

At step S10, the step S9 is performed.
Then, a sewing pattern is formed by the sewing machine drive system 11 based on the output Nth sewing data.

In step S11, it is determined whether or not the sewing of the Nth pattern pattern is completed. When this determination is affirmative, the process proceeds to step S12. On the other hand, when the determination is negative, the process returns to step S9 and the sewing of the sewing machine is continued.

In step S12, the sewing machine temporarily stops and N is incremented by 1. Here, the N is N
Since it was = 1, it is incremented by 1 and N = 2.

In step S13, it is determined whether N is larger than L. At this time, if N> L, the determination is affirmative and the process ends. If it is determined to be negative, the process proceeds to step S5 and N = 2, so the work (processing) is performed on the second pattern pattern.

When the determination in step S7 is negative, the process proceeds to step S20, and the bobbin thread remaining amount warning display means 13 warns that the bobbin thread remaining amount is insufficient.
Proceed to. At this time, an audible warning may be given at the same time by a warning sound generator (not shown). Further, instead of the lower thread remaining amount warning display means 13, the liquid crystal display portion 9b
A warning may be displayed to indicate that the remaining amount of lower thread is insufficient.

In step S21, it is determined whether the lower thread has been replaced. When the bobbin thread is replaced, the determination is affirmative, and the process returns to step S5 again, and the bobbin thread remaining amount X and the bobbin thread required amount Y for the Nth pattern pattern are read and compared. On the other hand, when the lower thread is not replaced, the determination is negative, and the sewing operation is ended without performing the sewing operation.

In this embodiment, the lower thread remaining amount / necessary amount is compared for each pattern, but it may be changed for each color change of the embroidery thread.

[0040]

As is apparent from the above description,
The present invention has the following effects.

(1) The bobbin thread remaining amount and the bobbin thread required amount are compared for each pattern pattern, and when the bobbin thread remaining amount is less than the required amount,
Notify to that effect. Therefore, there is an effect that it is possible to prevent the problem that the lower thread runs out during the sewing of one entire pattern pattern.

Further, according to the notification, the bobbin thread can be replaced at the boundary between the pattern patterns. Therefore, there is no need to reversely read the pattern data and re-sewing, no complicated work is required, and the finished stitch pattern is improved.

(2) Since the bobbin thread is replaced at an appropriate time, the remaining amount of the bobbin thread is minimized, and the waste of the bobbin thread is eliminated.

[Brief description of drawings]

FIG. 1 is a block diagram showing a hardware configuration of a sewing machine having a lower thread remaining amount / necessary amount comparison function according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the one embodiment.

FIG. 3 is an explanatory diagram of patterns and pattern patterns.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pattern data storage means, 2 ... Pattern selection means, 3 ... Selected pattern storage means, 4 ... Pattern lower thread amount storage means, 5 ... Lower thread remaining amount detection means, 6 ... Lower thread remaining amount storage means, 7 ... Lower Needed thread storage means, 8 ... Central processing unit, 9 ... Display section, 10 ... Sewing data storage means, 11 ... Sewing machine drive system, 12 ... Lower thread necessary amount comparison means, 13 ... Lower thread remaining amount warning display means, 30 … Pattern 3
1-34 ... Pattern pattern.

Continued Front Page (72) Inventor Takayuki Kawasato 1463, Sakuma-cho, Hachioji-shi, Tokyo Janome Eye Machinery Co., Ltd.

Claims (1)

[Claims] 1. A bobbin thread remaining amount / necessary amount comparison function for detecting a shortage of a bobbin thread remaining amount when automatically selecting a desired pattern from a plurality of prestored patterns and automatically sewing. In the sewing machine, the lower thread remaining amount detecting means for detecting the actual remaining amount of the lower thread wound around the lower thread holding means, the lower thread remaining amount, and the required lower thread amount for each selected pattern pattern. And a lower thread remaining amount insufficiency notifying means for notifying the shortage of the remaining amount of lower thread according to the result of the comparison made by the lower thread necessary amount comparing means. Sewing machine with a lower thread remaining amount / necessary amount comparison function.