Sewing – Special machines – Embroidering
Utility Patent
1997-11-10
2001-01-02
Nerbun, Peter (Department: 3741)
Sewing
Special machines
Embroidering
C112S445000
Utility Patent
active
06167822
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a pattern sewing machine, a pattern sewing method, and a pattern display method.
Hitherto, a sewing pattern, such as an embroidered pattern, has been prepared assuming that it is formed by one sewing within the sewable range of an embroidery frame (cloth holding frame). However, a large-sized pattern or an embroidered pattern of a long character string, etc., may be sewn, in which case the large-sized pattern or the embroidered pattern of a long character string, etc., cannot all be formed by one sewing since the pattern to be sewn is too large to be accepted within the frame. Thus, upon completion of formation of a predetermined part of the pattern by the first sewing, the cloth is removed from the embroidery frame and is slid so that the pattern part to be formed by the next sewing enters the embroidery frame, then again set on the embroidery frame for the next sewing.
To once remove the cloth from the embroidery frame and slide the cloth, then again set the cloth on the embroidery frame, the relative positions of the already formed embroidered pattern and the subsequent embroidered pattern to be sewn need to be matched. Therefore, when again setting the cloth on the embroidery frame, the worker visually checks that the already formed embroidered pattern is parallel to the embroidery frame and that the first stitch point position of the subsequent embroidered pattern to be sewn is placed at a position spaced at a predetermined pattern distance apart from the already formed embroidered pattern in X and Y directions. Of course, because of visual checking, the precision is poor and a desired fine embroidered pattern cannot be provided.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide a pattern sewing machine, a pattern sewing method, and a pattern display method capable of finely matching the relative positions of an already formed sewing pattern and a subsequent sewing pattern to be sewn and improving the sewing quality.
To accomplish the object, according to a first aspect of the invention, there is provided a pattern sewing machine comprising: a cloth holding frame having a predetermined area, for holding a cloth; a driving member for moving said cloth holding frame in X and Y directions; display means having a display screen, for displaying a pattern to be sewn, wherein the pattern displayed on said display screen is stitched on the cloth held by said cloth holding frame which is moved in the X and Y directions; rotation direction shift detection means for detecting a rotation direction shift of the cloth set in said cloth holding frame; recognition means for recognizing a reference point of the cloth in said cloth holding frame; and correction means for instructing a correction to said drive member based on the reference point recognized by said recognition means and the cloth rotation direction shift detected by said rotation direction shift detection means.
According to a second aspect of the invention, there is provided the pattern sewing machine of the first aspect, further comprising: means for setting a reference line on the cloth to form embroidery sewing; means for forming a part of an embroidery based on embroidery data on the cloth held in said cloth holding frame such that the reference line is placed along one side of said cloth holding frame; means for changing the holding position of the cloth in the cloth holding frame so as to enable a different part of the embroidery to be successively formed in a different place of the cloth; means for setting two points on the reference line of the cloth held in said cloth holding frame; means for correcting sewn embroidery data by transforming the sewn embroidery data so that the data corresponds to a rotated pattern with a predetermined reference point as a center of a line extending between the two setup points; and means for forming the different part of the embroidery based on the corrected embroidery data.
According to a third aspect of the invention, there is provided the pattern sewing machine of the second aspect, wherein the predetermined reference point is read before or after the two points are read, whereby the reference point is set.
According to a fourth aspect of the invention, there is provided the pattern sewing machine of the second or third aspect, wherein the two points or the predetermined reference point is set on said display screen.
According to a fifth aspect of the invention, there is provided a pattern sewing machine for forming an embroidery of a size that cannot be sewn in an embroidery frame without repositioning the workpiece with respect to the frame, said pattern sewing machine comprising: means for displaying a reference line set on a cloth to form embroidery sewing; means for displaying an embroidery to be sewn on the cloth held in the embroidery frame along the displayed reference line based on embroidery data; means for displaying two points on a new reference line of the cloth held in the embroidery frame; and means for correcting sewn embroidery data by transforming the sewn embroidery data so that the data corresponds to a rotated pattern with a predetermined reference point as the center of a line extending between the two points.
According to a sixth aspect of the invention, there is provided the pattern sewing machine of the fifth aspect, wherein the predetermined reference point is displayed before or after the two points are displayed.
According to a seventh aspect of the invention, there is provided a pattern sewing machine comprising: a cloth holding frame having a predetermined area, for holding a cloth; a driving member for moving said cloth holding frame in X and Y directions; display means having a display screen, for displaying a pattern to be sewn, wherein the pattern displayed on said display screen is stitched on the cloth held by said cloth holding frame which is moved in the X and Y directions; means for assigning an absolute position of the cloth hold by said cloth holding frame; means for rearranging the pattern displayed on said display screen such that the pattern corresponds to the absolute position; means for controlling said driving member to form the pattern corresponding to the pattern rearranged on the display screen.
According to an eighth aspect of the invention, there is provided the pattern sewing machine of the seventh aspect, wherein the absolute position is a rotational direction position.
According to a ninth aspect of the invention, there is provided the pattern sewing machine according to claim
7
or
8
, wherein the absolute position is a particular reference position on the part of pattern which has been sewn.
The pattern sewing machine of the invention recognizes the reference point of the cloth in the cloth holding frame by the recognition means, can space the stitch point data of the current sewing pattern to be sewn in the cloth holding frame at a predetermined pattern distance apart from the already formed embroidered pattern in the X and Y directions by the correction means based on the reference point, detects a rotation direction shift of the cloth set in the cloth holding frame by the rotation direction shift detection means, and corrects the stitch point data spaced at the predetermined pattern distance apart from the already formed embroidered pattern in the X and Y directions in the rotation direction with the reference point as the center by the correction means based on the reference point and the cloth rotation direction shift. Therefore, the relative positions of the already formed sewing pattern and the subsequent sewing pattern to be sewn can be matched finely.
According to the pattern sewing machine, to form an embroidery of a size that cannot go in the embroidery frame at a time, the relative positions of the already formed sewing pattern and the subsequent sewing pattern to be sewn can be matched finely.
According to the pattern sewing machine, the steps are displayed, so that operability can be improved.
REFERENCES:
patent: 4520745 (1
Horimoto Hiroshi
Miyasako Masami
Juki Corporation
Morgan & Finnegan , LLP
Nerbun Peter
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