Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Reexamination Certificate
2001-03-28
2003-05-20
Nerbun, Peter (Department: 3765)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
C112S102500, C112S470060
Reexamination Certificate
active
06567721
ABSTRACT:
TECHNICAL FIELD
This invention relates to an automatic sewing machine control apparatus for forming seams by driving and controlling a cloth holding down portion for use in clamping an article to be sewn.
BACKGROUND ART
In order to stitch desired sewing patterns using industrial sewing machines, sewing data corresponding to the sewing patterns is prepared and information for driving the sewing machines in accordance with the order of performing sewing operations is held in storage media such as floppy disks. While cloth as an article to be sewn is press-clamped according to the sewing data (information on sewing methods), a predetermined sewing pattern is automatically stitched by moving the cloth on a predetermined plane.
The sewing data includes a relative position displacement quantity between a machine needle per stitch for forming the sewing pattern and the cloth, and control commands for controlling the sewing machine and a motor for driving the machine. The sewing data on one sewing pattern is formed as a collection of data per stitch.
A conventional automatic sewing machine will be described with reference to
FIGS. 7 and 8
. In
FIGS. 7 and 8
, an automatic sewing machine
1
comprises an interlocking motor
2
for vertically operating a machine needle
8
via a belt
4
, a cloth hold-down portion
10
for use in clamping cloth
12
as an article to be sewn mounted on a machine table
1
a
, a switchgear
18
such as a cylinder, for example, for opening and closing the cloth hold-down portion
10
used for attaching and detaching the cloth
12
, and a biaxial driving mechanism
20
for moving the cloth
12
in the two axial directions X and Y together with the cloth hold-down portion
10
.
The biaxial driving mechanism
20
has an origin detector
21
for detecting the mechanical origin of the cloth hold-down portion
10
and is so arranged as to be moved in two axial directions of X and Y as an X- and a Y-axis motor
24
and
26
each having stepping motors are driven, the sprockets of the respective X- and Y-axis motors
24
and
26
being put on a belt.
A control portion
30
includes CPU
32
for use in controlling cloth feeding as well as the motor speed in the sewing machine, ROM
34
for storing a procedure for executing the system of the CPU
32
, RAM
36
for storing the sewing data prepared in an operating portion
50
, a driving portion
40
for driving motors, and an interface
42
for electrically connecting the origin detector
21
and the operating portion
60
.
The operating portion
50
includes numeric keys
52
for inputting lengths of sewing seams, a group of setting keys
54
for designating a sewing start point and the like, a group of sewing condition setting keys
56
as kinds-of-seams inputting means for inputting idle feeding and kinds of seams such as linear, arcuate, circular seams and the like, and inching keys
58
for inching the cloth hold-down portion
10
on the X- and Y-axis, including an X-axis and a Y-axis inching key for inching the biaxial driving mechanism
20
on the X- and Y-axis. Further, the operating portion
50
has a coordinate operating portion for obtaining X and Y coordinate values by increasing and decreasing the number of pulses from the inching keys, and a display portion
60
formed of a liquid crystal display for displaying the X- and Y-axis coordinate values.
The operation of the automatic sewing machine thus arranged will be described with reference to
FIGS. 7
to
11
. In a case where pocket cloth
13
as a sewing object is sewn to the cloth
12
so as to attain A→B→C→D→E sewing points from the origin by idle feedings shown in
FIG. 9
, there follow the steps of operating the X-Y driving mechanism
20
as shown in
FIG. 10
via the driving portion
40
to generate pulse commands by depressing the X- and Y-axis inching ±keys, making the coordinate operating portion compute the coordinate values of Xa and Ya at the point A according to the pulse command by moving the machine needle
8
from the origin to the position of the point A, and storing the coordinate values in the RAM
36
by depressing the setting key.
Similarly, there also follow the steps of, as shown in
FIG. 10
, operating the X-Y driving mechanism
20
by depressing the X- and Y-axis inching keys to operate the X-Y driving mechanism
20
to position the machine needle
8
at the point B, depressing the setting key and the linear sewing key to store the coordinate values of Xb and Yb and the kind of sewing in the RAM
36
, then positioning the machine needle
8
at the point C, and depressing the setting key and the linear sewing key to store the coordinate values of Xc and Yc and the kind of sewing in the RAM
36
. The coordinate values at the points D and E are stored in the RAM
36
likewise.
As the automatic sewing machine control apparatus has thus been arranged, the sewing patterns have been stored in the RAM
36
with the operator's operation of the biaxial driving mechanism
20
to actuate the X and Y motors
8
and
9
by depressing the X- and Y-axis inching keys and the like when sewing data is newly input to and stored in the RAM
36
. However, it is impossible for the biaxial driving mechanism
20
to move quickly as the X and Y motors
8
and
9
only operate intermittently, which necessitates a great deal of time to prepare the sewing pattern data. In particular, when a large amount of data is input, a large amount of time is necessary for processing the data.
As the automatic sewing machine control apparatus has thus been arranged, the sewing patterns have been stored in the RAM
36
with the operator's operation of the biaxial driving mechanism
20
to actuate the X and Y motors
8
and
9
by depressing the X- and Y-axis inching keys and the like when sewing data is newly input to and stored in the RAM
36
. However, it is impossible for the biaxial driving mechanism
20
to move quickly as the X and Y motors
8
and
9
only operate intermittently, which necessitates a great deal of time to prepare the sewing pattern data. Particularly when a large amount of data is input, there has developed a problem from causing a good long time therefor to be taken.
In view of the above problems, it is therefore an object of the present invention to provide an automatic sewing machine control apparatus which reduces the work of arranging an article to be sewn.
DISCLOSURE OF THE INVENTION
An object of the present invention made to solve the foregoing problems is to provide an automatic sewing machine control apparatus which is intended to reduce the work of arranging an article to be sewn.
In order to accomplish the object above, an automatic sewing machine control apparatus in the first aspect of the invention comprises: kinds-of-seams inputting means for inputting idle feeding and kinds of seams such as linear, arcuate, circular seams and the like corresponding to the seam pattern of an article to be sewn, a cloth hold-down portion for clamping the article, a machine needle which is interlocked with a driving motor for use in sewing the article, a biaxial driving mechanism allowing the cloth hold-down portion to be manually moved in both X- and Y-axis directions perpendicularly intersecting each other, an X- and a Y-axis motor for driving the biaxial driving mechanism, rotational angle detection means for detecting the rotational angles of the X- and Y-axis motors, X and Y coordinate value computing means for obtaining the coordinate values of X and Y from the origin of the biaxial driving mechanism according to the values detected by the rotational angle detection means, storage means for storing the X and Y coordinate values obtained by the X and Y coordinate computing means by manually moving the biaxial driving mechanism to at least more than one predetermined position of the machine needle, and forming means for receiving the predetermined position thereof and forming a seam pattern corresponding to the kind of the seam received from the kinds-of-seams inputting means.
An automatic sewing machine cont
Mitsubishi Denki & Kabushiki Kaisha
Nerbun Peter
LandOfFree
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