JPH05200180A - Automatic thread-cutting type sewing machine of pattern sewing - Google Patents

Abstract

PURPOSE:To transfer sewing patterns like patch works with sewing threads to a required position, by providing a thread cutter which instructs a block thread-cutting motion automatically cutting the threads when the block sewing has completed, regarding a thread-cutting command in the block-sewing data on sewing as an effective one. CONSTITUTION:A block thread-cutting setter 14 holds a thread-cutting signal output by the manipulation of a thread-cutting key operation 10 during operation as a block thread-cutting instruction and a thread-cutting mode setter 8 cuts the threads, regarding the block thread-cutting instruction during sewing operation as an effective instruction, in the thread-cutting mode. A solenoid 13b drive instruction is output through a solenoid driver 13a against the thread cutting drive means 13a, 13b after the upper shaft phase is adjusted by an upper shaft phase adjustment data. In this way, the upper thread and the lower thread are cut off.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embroiderable sewing machine that forms a pattern by embroidery stitching, and in particular, a thread trimming control for independently embroidering a plurality of block stitches that form a pattern. Related to sewing machines. 2. Description of the Related Art In embroidery sewing with a sewing machine, a sewing machine is known in which a pattern is formed into a plurality of blocks and the blocks are sewn to form embroidery stitches. In such a pattern, when the color of the upper thread is changed for each block and the pattern is formed with a change like patchwork, the operator stops the sewing machine at the end of each block and After cutting, it was necessary to change the color of the upper thread and perform embroidery sewing on other blocks. On the other hand, in the case where the pattern data is configured and stored in advance by stopping each block, it is not possible to stop / thread cut only the pattern portion desired by the operator. Therefore, as a result of various studies by the inventor, the inventor selects a desired pattern from a plurality of patterns stored in advance and forms a pattern stitch based on the pattern data.
In a thread trimming sewing machine including a solenoid driver for thread trimming operation and thread trimming driving means including a solenoid, the pattern data is block sewing data divided for each constituent element of the pattern and the block. Pattern data storage means for storing block sewing pattern data composed of a sewing data code including a thread trimming command for instructing stop and thread trimming for each stitch formation; and operating means operable by a worker, A pattern having a thread trimming operation means for instructing a block thread trimming operation in which the thread trimming command in the block sewing data being sewn is validated by an operation to automatically perform a thread trimming operation at the end of block sewing By using an automatic thread trimming sewing machine for sewing, the thread trimming operation means is operated during pattern sewing to perform thread trimming at the end of block sewing. The by instruction input, since the thread cutting at a desired block sewing ends, easily to obtain a pattern of blocks sewing of a desired length. Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the present invention. Pattern data storage means A1 for storing a plurality of predetermined pattern data, pattern selection means A2 for selecting a desired pattern. The upper shaft phase detecting means A3 for detecting the phase of the upper shaft rotation and the display and driving means A4 of the sewing machine are the same as those of the conventional electronically controlled sewing machine and are connected to the central processing unit A for controlling the sewing machine. In order to select which one of the thread trimming modes for each block and the thread trimming in the final block, the thread trimming mode is selected, and for instructing to trim the desired block in the thread trimming mode for each block. A thread trimming selection means B1, which is operable on the thread trimming control setting means B2 for storing the selected thread trimming mode setting, a computation / display data storage means B3 for storing data for thread trimming calculation and display, and a thread The thread trimming driving means B4 for performing the cutting and the block thread trimming setting means B5 for holding the block sewing thread trimming command instructed during sewing are connected to the central processing unit B for the thread trimming operation. FIG. 2 is a block diagram for explaining the blocks constituting the pattern of the present invention. The letter A will be described as an example.
In this character, each block is composed of large blocks, and each block is composed of, for example, small blocks a to e. Part of the stitch data is as shown in FIG. 3, and is composed of the address for reading the pattern, the thread trimming code for instructing thread trimming, and the stitching data for instructing the relative movement amount of the needle and the cloth. It is configured. FIG. 4 is a detailed block diagram of the control section of the present invention. The display data of the pattern selected by the pattern selection means 5 is read from the pattern display data storage means 2 and the display circuit of the display system 3 is displayed. It is output to 3a and displayed on the liquid crystal display 3b. Further, the stitch formation of the selected pattern is performed by the drive circuit 6a according to the stitch data read from the pattern data storage means 1 in association with the detected phase detected by the upper axis phase detection means 5a.
A stitch is formed by the amplitude stepping motor 6b and the feed stepping motor 6c which are connected to each other, and the motor drive circuit 6d and the drive motor 6e. This series of control is carried out by the central processing unit A4.
The calculation process is performed in the same manner as in the well-known electronically controlled zigzag sewing machine, and the description thereof will be omitted. Next, each configuration and functional means relating to the thread cutting drive in the control unit B centering on the central processing unit B9 will be described. The thread trimming key operating means 10 sends a key operating signal to the central processing unit B9 by operating the key. Output. The thread trimming mode setting means 8 receives the key operation signal operated after the operation of the pattern selecting means, and sets the block thread trimming mode in which the thread trimming command for each block in the pattern stitch formation data is valid. However, if the thread trimming operation means is not operated following the operation of the pattern selecting means and there is no operation signal, the thread trimming mode at the end of the pattern in which the thread trimming command of the last block in the pattern stitch formation data is valid Set to. For thread trimming, the upper axis phase when the upper axis is stopped is calculated and the count command for thread trimming drive is calculated according to the upper axis phase adjustment suitable for thread trimming. Based on the result of reading and calculating the data, the phase of the upper shaft is adjusted according to the command, and then the thread cutting is performed according to the above-mentioned count in response to the thread cutting command at the end of the sewing block sewing. These thread trimming calculation and control processes are performed by the central processing unit A4 and the central processing unit B9, which are similar to those of the conventional sewing machine, being transmitted via the interface 7 in association with each other. A block thread trimming setting means 14 holds a thread trimming signal output by operating the thread trimming key operating means 10 during operation as a block thread trimming command. In the block thread trimming mode, the mode setting means 8 validates the thread trimming command of the block in which the stitch is being formed and trims the thread. The liquid crystal display shows the set state of the set thread trimming mode. The thread cutting mode is changed by operating the thread cutting operating means again, but a canceling means may be provided separately. After the upper shaft phase is adjusted by the upper shaft phase adjustment data, the thread trimming drive means 13 issues a command to drive the solenoid 13b via the solenoid driver 13a, whereby the upper thread and the lower thread are driven. Thread cutting is performed. Regarding the thread trimming mechanism operated by the solenoid, the applicant of the present application filed Japanese Patent Publication No. 55-393.
Since it is publicly known, such as 58, the description thereof will be omitted, but it is not specified. FIG. 5 is an explanatory view showing the operation of the embodiment of the present invention in a flow chart, and each step is as follows. In step 1 (the same applies hereinafter for S1), a desired pattern is selected by operating the pattern selecting means. Then S
In step 2, it is determined whether or not the thread trimming operation means 10 has been operated, and if operated, the thread trimming mode for executing thread trimming for each block sewing is set in the thread trimming mode setting means 8 in step S3. Next, when the start command means (not shown) is operated in S4, the block sewing data is read out and output from the pattern data storage means 1 in S5, and the sewing machine motor and the pattern forming operation are executed in S6. Stepping motors 6b, 6
Drive c to form a stitch. When the thread trimming command in the block sewing data is detected in S7, it is determined in S8 whether the thread trimming operation means is operated during the block sewing to set the block thread trimming. If it is not operated during operation, the thread trimming code is ignored and the joint block sewing data read control is performed. If the thread trimming operation means 10 is operated during operation and the block thread trimming setting means 14 is set to block thread trimming, the sewing machine is slowed down or temporarily stopped in S9 to perform thread trimming. After thread cutting, in S10, it is judged whether or not the pattern is all finished. If there is a succeeding block portion, the sewing data of the next block is read out in S5 by the start command of S4 and the stitches are similarly formed. To do. If the thread trimming operation key is not operated in S2 and the block sewing thread trimming mode is not set, the thread trimming mode at the end of the pattern is set in S11. If the start command means is operated in S12,
In Steps 14 and 14, the sewing data is read and the thread trimming code for each block is ignored to form a stitch. In S15, it is determined whether or not it is the final block, and only in the final block, in S16, the thread trimming code is made effective and the sewing machine is slowed down or stopped to perform thread trimming. In this embodiment, the solenoid is used as the thread trimming drive means, but it may be an electric motor such as a stepping motor. Further, in this embodiment, in order to facilitate the explanation, in FIG. 2, the sewing machine control system is divided into a control section A for normal pattern sewing and a thread trimming calculation control section B for thread cutting at the end of sewing. However, it is within the scope of the present invention to construct these control systems by incorporating all of B into A and combining them into one, or by incorporating a part of B into A. Of course you can get it. According to the sewing machine capable of thread trimming in the pattern sewing of the present invention, a desired block can be used even if the thread trimming operation is complicated in the middle of the pattern, such as a pattern to be changed in color. By operating the thread trimming operation means during sewing,
The thread trimming code in the block sewing data automatically performs thread trimming, so the thread trimming / stop position can be stopped at a desired position and at a fixed position without variation for each sewing. it can. As a result, it is possible to easily set the color change stop position of the color change pattern. Therefore, by changing the color of the thread in one pattern and forming it, it is possible to change the sewing pattern such as the patchwork using the sewing thread to a desired position. Can be formed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing a configuration of the present invention. FIG. 2 is an explanatory diagram showing a plurality of block portions of a pattern of the present invention. FIG. 4 is a detailed explanatory view of the configuration of the present invention. FIG. 5 is an explanatory view showing the operation of the present invention. [Explanation of reference numerals] 1 ... Pattern data storage means 2 ... Pattern selection means 10 ... Thread trimmer selection means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koji Sumiyoshi             3-1-1, Kyobashi, Chuo-ku, Tokyo             Shin Industry Co., Ltd.

Claims (1)

[Claims] 1. Thread trimming is possible by selecting a desired pattern from a plurality of patterns stored in advance, forming pattern stitches based on the pattern data, and providing a solenoid driver for thread trimming operation and a thread trimming drive means including a solenoid. In the sewing machine,
The pattern data is block sewing pattern data composed of block sewing data divided for each constituent element of the pattern and a sewing data code including a thread cutting command for instructing stop and thread cutting for each block stitch formation. The stored pattern data storage means and the operating means operable by the operator enable the thread trimming command in the block sewing data being sewn by the operation to automatically perform the thread trimming operation at the end of the block sewing. An automatic thread trimming sewing machine for pattern sewing, comprising: thread trimming operation means for instructing a block thread trimming operation to be performed.