JP2879275B2 - Automatic thread trimming sewing machine for pattern sewing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embroidery sewing machine for forming a pattern by embroidery sewing, and more particularly to a sewing machine for performing thread trimming control for independently embroidering a plurality of block stitches for forming a pattern.

[0002]

2. Description of the Related Art In embroidery sewing using a sewing machine, there has been known a sewing machine 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 so as to have a change like patchwork, the operator stops the sewing machine at the end of each block and sets the thread. After cutting, it was necessary to change the color of the upper thread and embroider another block. On the other hand, in the case where pattern data is configured and stored in advance by stopping each block, it is not possible to stop / thread trim only a desired pattern portion of the operator.

[0003]

As a result of various studies, the inventor selects a desired pattern from a plurality of patterns stored in advance and forms a pattern seam based on the pattern data.
In a thread trimming sewing machine provided with a solenoid driver for thread trimming operation and a thread trimming driving means including a solenoid, the pattern data includes block sewing data divided for each component constituting the pattern and the block sewing data. Pattern data storage means for storing block stitching pattern data including a sewing data code including a thread trimming command for instructing stop and thread trimming for each stitch formation; and operating means operable by an operator, 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 and a thread trimming operation is automatically performed when the block sewing is completed. By using an automatic thread trimming sewing machine in 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.

[0004]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the present invention. The pattern data storage means A1 stores a plurality of predetermined pattern data, and a 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 drive means A4 of the sewing machine are the same as the conventional electronic control sewing machine, and are connected to the central processing unit A for controlling the sewing machine.

In order to select one of the thread trimming modes of thread trimming for each block and thread trimming for the last block, and for instructing thread trimming of a desired block in the thread trimming mode for each block. Thread trimming selecting means B1, Thread trimming control setting means B2 for storing the selected thread trimming mode setting, operation / display data storing means B3 for storing data for thread trimming calculation and display A thread cutting drive means B4 for performing cutting and a block thread cutting setting means B5 for holding a block sewing thread cutting command instructed during sewing are connected to a central processing unit B for thread cutting operation.

FIG. 2 explains the blocks constituting the pattern of the present invention. The letter A will be described as an example.
In this character, each character is composed of large blocks, and each block is composed of, for example, small blocks a to e. A part of the data of the stitch is as shown in FIG. 3, and is obtained from an address for reading the pattern, a thread cutting code for instructing thread cutting, and sewing data for instructing a relative movement amount between the needle and the cloth. It is configured.

FIG. 4 is a detailed block diagram of the control unit according to 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. The stitch formation of the selected pattern is performed according to the sewing data read from the pattern data storage means 1 in association with the detected phase detected by the upper axis phase detection means 5a.
The stitch is formed by the amplitude stepping motor 6b and the feed stepping motor 6c connected to the motor drive circuit 6d and the motor drive circuit 6d and the drive motor 6e.

This series of control is performed by the central processing unit A4.
This is the same as a known electronically controlled zigzag sewing machine, and a description thereof will be omitted. Next, each configuration and functional means relating to the thread cutting drive in the control unit B centered on the central processing unit B9 will be described.

The thread trimming key operating means 10 sends a key operation signal to the central processing unit B9 by operating the key. Output. The thread trimming mode setting means 8 sets the block thread trimming mode in which the thread trimming command for each block in the pattern stitch forming data is validated upon receiving the key operation signal operated following the operation of the pattern selecting means. When the thread trimming operating 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 forming data is made valid. Set to. For thread trimming, an upper shaft phase adjustment operation suitable for thread trimming and a count command for thread trimming drive are performed with respect to the upper shaft phase when the upper shaft is stopped. Based on the result of reading and calculating the data, the upper shaft is phase-adjusted according to the command, and then the thread is trimmed according to the above-mentioned count in response to the thread trimming command at the end of the sewing of the sewing block. These thread trimming calculation and control processing are performed by transmitting the central processing unit A4 and the central processing unit B9, which are similar to those of the conventional sewing machine, via the interface 7 in relation to each other.

Reference numeral 14 denotes a block thread trimming setting means for holding 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 a thread trimming command of a block in which a stitch is being formed and performs thread trimming. The set state of the set thread trimming mode is shown on the liquid crystal display. The change of the thread trimming mode is changed by operating the thread trimming operation means again. However, a separate canceling means may be provided.

After the upper shaft phase is adjusted by the upper shaft phase adjustment data, a command to drive a solenoid 13b is issued via a solenoid driver 13a. Thread trimming is performed.

The thread cutting mechanism by the operation of the solenoid is disclosed in Japanese Patent Publication No. 55-393 filed by the present applicant.
Since it is a publicly known one such as 58, its description is omitted but not specified.

FIG. 5 is an explanatory diagram showing the operation of the embodiment of the present invention in the form of a flowchart, and each step is as follows. In step 1 (the same applies to S1), a desired pattern is selected by operating the pattern selection means. Then S
In step 2, it is determined whether or not the thread trimming operation means 10 has been operated. If the operation has been performed, 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 from the pattern data storage means 1 in S5 and outputted, and in S6, the sewing machine motor and the pattern forming data are formed. Stepping motors 6b, 6
c is driven to form a stitch.

When a thread trimming command in the block sewing data is detected in S7, it is determined in S8 whether thread trimming operation means is operated during block sewing and block thread trimming is set. If the operation is not performed during the operation, the thread trimming code is ignored and reading control of the joint block sewing data is performed. If the thread trimming operation means 10 is operated during the operation and the block thread trimming setting means 14 has set the block thread trimming, the sewing machine is slowed down or temporarily stopped in S9 to perform the thread trimming.

After thread trimming, it is determined in S10 whether or not all the patterns are completed. If there is a subsequent block, the sewing data of the next block is read out in S5 according to the start command in S4, and the stitch is formed in the same manner. I 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,
The sewing data is read out in steps (14) and (14) to form a stitch ignoring the thread cutting code for each block.

At S15, it is determined whether or not it is the last block, and only at the last block, the thread trimming code is validated at S16, and the sewing machine is slowed down or stopped to perform thread trimming.

In this embodiment, a solenoid is used as the thread cutting drive means. However, this can be used as an electric motor such as a stepping motor.

Further, in this embodiment, the sewing machine control system in FIG. 2 is divided into two parts, a control part A for normal pattern stitching and a thread trimming operation control part B for performing thread trimming at the end of sewing, for ease of explanation. However, it is within the scope of the present invention that these control systems are configured to be integrated into one by incorporating all of B into A, or configured to incorporate a part of B into A, for example. Obviously you can get it.

[0021]

According to the sewing machine of the present invention capable of thread trimming in pattern sewing, even a complicated pattern requiring thread trimming in the middle of a pattern, such as a color changing pattern in the middle of the pattern, can be used during a desired block sewing. By operating the thread cutting operation means,
Since the thread trimming is automatically performed according to the thread trimming code in the block sewing data, the thread trimming / stopping position is a desired position, and the thread trimming / stopping can be performed at a fixed position without variation for each sewing. it can. This makes it easy to set the color change stop position of the color change pattern, so that by changing the color of the thread in one pattern, a sewing pattern such as a patchwork using sewing threads is changed 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 view showing a plurality of block portions of the pattern of the present invention.

FIG. 3 is an explanatory diagram showing a part of a data configuration of a block unit according to the present invention.

FIG. 4 is a detailed explanatory diagram of the configuration of the present invention.

FIG. 5 is an explanatory view showing the operation of the present invention.

[Explanation of symbols]

 1 pattern data storage means 2 pattern selection means 10 thread trimming selection means

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D05B 1/00-83/00

Claims (1)

(57) [Claims] And a thread trimming driving means including a solenoid driver for performing a thread trimming operation, selecting a desired pattern from a plurality of patterns stored in advance, forming a pattern stitch based on the pattern data, and a solenoid. In the sewing machine provided with a thread trimming machine, the pattern data includes a block sewing data divided for each component configuring the pattern and a thread cutting command for instructing stop and thread trimming for each block stitch formation. Pattern data storage means for storing block sewing pattern data consisting of data codes; and operating means operable by an operator, wherein the thread sewing command in the block sewing data being sewn by the operation is enabled to perform the block sewing. A thread trimming operation means for instructing a block thread trimming operation for automatically performing a thread trimming operation at the end of the pattern sewing. Automatic thread trimming sewing machine.