JPH0684584B2 - Embroidery sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an embroidery sewing machine capable of saving a crossover thread.

[Prior Art] When a plurality of patterns (characters, figures, etc.) are continuously sewn successively, as shown in FIG. 7, the sewing end point Pex of the pattern X sewn first and the pattern sewn next A crossover thread Lx is generated between the sewing start point Psy of Y. The crossover thread Lx should be removed one by one by the operator after the completion of the embroidery so as not to spoil the appearance of the embroidery product.

[Problems to be Solved by the Invention] By the way, the conventional embroidery sewing machine has only one pattern data Dx, Dy for the patterns X, Y. Therefore, in the arrangement as shown in FIG. As indicated by the chain double-dashed line, the crossover yarn cannot be formed in the shortest distance with respect to the pattern Y, and depending on the pattern arrangement, the wasteful crossover yarn becomes long and there is a problem that the material cannot be saved.

Therefore, there has been a demand for an invention of an embroidery sewing machine which has a novel structure and which can easily and reliably save materials.

Configuration of the Invention The present invention employs the following configurations in order to solve the problems.

[Means for Solving the Problems] That is, the gist of the present invention is, as illustrated in FIG. 1, an embroidery sewing machine in which a plurality of patterns are sequentially sewn on a work cloth one by one. Storage means M1 for storing, for each pattern, a plurality of pattern data each having a sewing end point and a sewing start point different from each other, and a sewing end point of the preceding pattern based on the stored pattern data. The length calculation means M2 for calculating the length of the crossover thread passed between the sewing start point of the next pattern and each of the plurality of pattern data corresponding to the next pattern, and the calculated length of the crossover thread Among them, the embroidery sewing machine is provided with a selecting means M3 for selecting one pattern data having a sewing start point related to the shortest crossover thread as a pattern next to the preceding pattern.

[Operation] The embroidery sewing machine of the present invention stores a plurality of pattern data having different sewing start points for one pattern in the storage means M1.
Stored in. The length calculation means M2 determines, for each of a plurality of pattern data corresponding to the patterns to be formed in the subsequent order, for the continuously formed patterns, the sewing end point and the pattern data of the pattern to be formed first. The length of the crossover thread passed between the sewing start point and the sewing start point of is calculated. Then, the selection means M3
Selects pattern data having the shortest crossover yarn length based on the above calculation result. By forming the subsequent pattern by the pattern data selected in this way, the crossover yarn is passed between the patterns without waste, and the yarn can be saved easily and surely.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

The embroidery sewing machine of the embodiment is as shown in the block diagram of FIG.
Work cloth 2 and needle 3 fixed by driving the embroidery frame 1 in the XY directions
A drive motor 4 for changing the relative positional relationship with the sewing machine, a sewing machine motor 5 for moving the needle 3 up and down to form an embroidery pattern on the work cloth 2, and a drive motor 4 and a control device 6 for driving and controlling the sewing machine motor 5. , A storage device 7 for giving sewing data to the control device 6
And a keyboard 8 for giving various instructions to the control device 6.

The control device 6 is a logical operation circuit mainly composed of the CPU 61, ROM 62, RAM 63, reads sewing data from the storage device 7 via the input interface 64, and outputs the data.
A control signal is sent to the drive motor 4 and the sewing machine motor 5 via 65. Further, various instructions from the keyboard 8 are taken in via the input interface 64.

As shown in FIGS. 3 (a) and 3 (b), the storage device 7 stores a plurality of different sewing start points Psa1 to Psa4, Psb1 to Psb4 and sewing end points Pea1 to Pea4, Peb1 to Peb4 for the patterns A and B. Pattern data D
Stores a1 to Da4 and Db1 to Db4. For example, when the pattern A is designated, any one of the pattern data Da1 to Da4 is selected. The same applies when designating pattern B. By the way, when sewing the patterns A and B in the vertical arrangement in the order of A → B, the fourth pattern is sewn.
A combination of figures (a) to (d) is conceivable. In this embodiment, the pattern data Da1 in the first storage order is automatically selected as the first pattern A. Here, from the viewpoint of saving the crossover yarn, it is desired to select the pattern data with the shortest crossover yarn. As shown in the figure, the crossover thread L2 is the shortest in this example, and the pattern data
Select Db2. As is clear from the figure, normally, the shortest jumper thread does not cause intermediate stitching.Therefore, selecting the shortest jumper thread L1 to L4 among the pattern data Db1 to Db4 is Saves money and prevents intermediate stitching,
It is possible to simplify the crossover thread processing work after sewing. In this embodiment, as described above, the sewing start points Psa1 to Psa4, Psb1 to Psb4
Each of the four pattern data Da so that is either on the top, bottom, left or right
1 to Da4 and Db1 to Db4 are stored in the storage means 7, and the control processing as described below with reference to FIG. It also enables sewing prevention. The control process will be described below.

As shown in FIG. 5, first, in step S1 (hereinafter simply referred to as S1), a pattern to be formed is selected. For example, the pattern is selected from the keyboard 8 by the code number or directly by the letter keys such as A, B, C, .... Then, in S2, processing information such as pattern arrangement, size, thread density, and rotation angle is set.
The processing information is set on the keyboard 8 through the numeric keys and the dedicated keys. In S3, it is determined whether the pattern selection is completed, that is, whether the completion key on the keyboard 8 is pressed. When the completion key is pressed, the process proceeds to S4, and when not pressed, the process returns to S1 and the next pattern is selected. In S4, the pattern data corresponding to the selected pattern is read from the storage device 7. For example, when the patterns A and B are vertically arranged in the order of A → B, the pattern data Da1 to Da4 are first read. Then S5
Then, it is determined whether or not there is a preceding pattern. If there is no preceding pattern, that is, for the first pattern, the process proceeds to S6, the pattern data Da1 that is the first in the storage order is selected, and the presence or absence of the next pattern is determined in S9. Since there is the next pattern B, the process returns to S4 to read the pattern data Db1 to Db4. This time, S5 is affirmative and the process proceeds to S7. In S7, the lengths of the crossover threads L1 to L4 are calculated for each of the pattern data Db1 to Db4, and in S8, the shortest crossover thread Db2 is selected as shown in FIG. Thereafter, when it is determined in S9 that there is no next pattern, the process proceeds to S10, and based on the selected pattern data Da1 and Da2, patterns A and B are transferred onto the work cloth 2 as shown in FIG. Sew.

As described above, according to the present embodiment, simple and reliable
In addition, it is possible to save the crossover thread and prevent intermediate stitching of the crossover thread. By further increasing each sewing data, the effect of saving the crossover thread is further enhanced. Also,
As shown in FIG. 6, it is assumed that the pattern data Db11 to Db14 have relay points Pm1 to Pm4 at predetermined positions around the pattern B, and the crossover thread length is the sewing end point Pea1 → relay points Pm1 to Pm4 → sewing start point. The path length of Psb1 to Psb4 that is the shortest may be selected. In this case, relay points Pm1 to Pm4
Preliminary settings can be made to prevent intermediate stitching of the crossover thread, and there is no need to worry about intermediate stitching. Furthermore, in the embodiment, it is more preferable to select the shortest length that is equal to or longer than the predetermined length in S8 so that the length necessary for the scissors work during the crossover yarn processing can be always secured. Further, the relay points Pm1 to Pm4 may be given as data so that the above-mentioned predetermined length can always be secured.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modes can be adopted without departing from the scope of the invention.

EFFECTS OF THE INVENTION According to the present invention, it is possible to save the crossover yarn very simply and reliably. Further, as a side effect, in the case of the shortest transition yarn, the intermediate stitching of the transition yarn does not occur, so that the transition yarn processing work is simplified. In addition, when performing such a crossover yarn processing operation, the operator only needs to select a pattern, and the data creation operation is also easy. In addition, since only one data is selected from a plurality of pre-stored pattern data, the calculation processing time required for selection can be short, and the data can be created quickly and comfortably. Is effective in

[Brief description of drawings]

FIG. 1 is a block diagram illustrating the configuration of the present invention, FIG. 2 is a block diagram illustrating the configuration of an embodiment, and FIGS. 3 (a) and 3 (b).
Is an explanatory view of the pattern data of the embodiment, FIG.
(D) is an explanatory diagram of pattern data selection, FIG. 5 is a flowchart of control processing of the embodiment, FIG. 6 is an explanatory diagram of other pattern data, and FIG. 7 is an explanatory diagram of a sewing state of a conventional example. M1 ... Storage means, M2 ... Length calculation means M3 ... Selection means 1 ... Embroidery frame, 2 ... Work cloth 3 ... Needle, 4 ... Drive motor 5 ... Sewing machine motor, 6 ... Control device 7 ... Storage device, 8 ... Keyboard

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuzo Takagi 9-35 Hotta-dori, Mizuho-ku, Nagoya-shi, Aichi Brother Industries, Ltd. (72) Inventor Shigehiro Matsushita 9-35 Hotta-dori, Mizuho-ku, Nagoya, Aichi Address within Brother Industries, Ltd. (56) Reference JP-A-64-37993 (JP, A) JP-B-59-38344 (JP, B2)

Claims (1)

[Claims] 1. An embroidery sewing machine which sequentially sewes a plurality of patterns on a work cloth one by one, and a plurality of pattern data each having a sewing end point and a sewing start point different from each other for one pattern. The storage means for storing each pattern and the length of the crossover thread passed between the sewing end point of the preceding pattern and the sewing start point of the next pattern are set to the next pattern based on the stored pattern data. Length calculation means for calculating each corresponding plurality of pattern data, and one pattern data having the sewing start point relating to the shortest jumper thread among the calculated jumper thread lengths of the preceding pattern An embroidery sewing machine comprising: a selection unit that selects a next pattern.