JPH0679629B2 - Program sewing machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a program sewing machine having a plurality of presser feet and used for sewing using a preselected presser foot.

(Problems to be Solved by Prior Art and Invention) Generally, in a sewing factory, one operator is in charge of a plurality of sewing processes, and a sewing machine equipped with different kinds of presser foot is used for each sewing process. There are many cases.

Further, as a conventional program sewing machine, in order to cope with a plurality of sewing processes, the number of stitches required for sewing of the sewing pattern is stored for each sewing pattern, and the sewing is performed based on the stored data. There is.

However, in the conventional program sewing machine, only one type of presser foot is provided for one sewing machine, and since the type of presser foot cannot be incorporated in the sewing pattern data, one operator Uses a plurality of program sewing machines, and the function of the program sewing machine that the sewing machine can perform sewing based on a plurality of sewing patterns has not been utilized. Further, there has been a problem that the installation space of the sewing machine in the sewing factory increases.

(Object of the Invention) The present invention has been made in view of the above circumstances,
The purpose is to provide a program sewing machine capable of equipping one program sewing machine with a plurality of different types of presser feet and selectively using each presser foot according to a plurality of sewing processes to execute sewing. To do.

(Means for Solving the Problems) In order to achieve the above-mentioned object, in the present invention, processing is performed in a state in which it is movably supported toward a stitch forming position and selectively arranged at the stitch forming position. A plurality of presser feet for pressing the cloth on the work cloth supporting surface, an operating means for selectively arranging one of the plurality of presser feet at the stitch forming position, and one presser foot prior to the sewing operation. And a control means for controlling the actuating means on the basis of the stored data.

(Operation) Therefore, prior to the sewing operation, the control means controls the operating means on the basis of the stored data, and one pressing foot is selectively arranged at the stitch forming position by the operating means.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

Now, as shown in FIG. 3, the arm portion 1a of the sewing machine frame 1
A needle bar support case 2 is supported on the front surface so as to be movable left and right, and six needle bars 4 each having a needle 3 at its lower end are supported on the needle bar support case 2 so as to be vertically movable. Then, the needle bar support case 2 is moved left and right based on the rotation of the needle bar switching motor 5 shown in FIG.
The needle bar 4 of the book is selectively arranged at the stitch forming position. At this time, the needle bar 4 is operatively connected to the sewing machine main shaft (not shown), the needle bar 4 is moved up and down in accordance with the rotation of the sewing machine main shaft, and the well-known thread loop catcher ( A seam is formed on the work cloth on the work cloth support surface 6 by operating (not shown).

Since the structure for selecting a predetermined needle bar is the same as that described in the specification and drawings attached to the application of Japanese Patent Application No. 60-261659 by the same applicant as this application, detailed description thereof will be omitted. Description is omitted, but refer to the application if necessary.

As shown in FIG. 3, a presser bar 7 is supported on the arm portion 1a of the sewing machine frame 1 so as to be vertically movable between an upper inoperative position and a lower operating position. As shown in FIG. 1, a substantially frustoconical support 8 is fixed to the lower end of the presser bar 7 by means of a mounting projection 8a. At the center of the support body 8, a motor shaft 10 of a presser foot switching motor 9 composed of a pulse motor is inserted and fixed from the bed portion 1b side. A presser foot mounting body 11 having a substantially truncated cone shape is rotatably supported between the presser foot switching motor 9 and the support body 8, and the presser foot switching motor 9 is provided at its center with a plurality of screws. It is fixed to the body 12 of.

As shown in FIGS. 1 and 2, three attachment pieces 13 are provided on the outer peripheral edge portion of the presser foot attachment body 11 at equal intervals, and each attachment piece 13 has a different type of presser foot. 14 is detachably attached with screws. When the presser foot switching motor 9 is driven, the main body 12 and the presser foot mounting body 11 are
And are rotated integrally, and each presser foot 14 is selectively arranged at the stitch forming position located on the axis of the presser bar 7. Further, in this arrangement state, the presser bar 14 and the presser foot 14 are arranged at the lower working position, so that a pressing force is applied to the work cloth.

Next, the electrical configuration of the program sewing machine of this embodiment will be described. As shown in FIG. 4, an operation panel 20 is provided on the front surface of the arm portion 1a of the sewing machine frame 1, and various keys for controlling the operation of the sewing machine are provided on the panel 20. . As shown in FIG. 5, the sewing machine in this embodiment has a central processing unit (CPU) 21 constituting a control means and a program for controlling the operation of the sewing machine as shown in FIGS. 6 and 7. Read only memory (ROM) 22, Random access memory (RAM) 23 that can store the sewing pattern data required for sewing in each sewing process
Is equipped with. Further, in the sewing pattern data, data for selecting the needle 3 and the presser foot 14 according to the sewing process (in this embodiment, the needle number and the presser foot number) and the sewing length of the sewing process are set. And the data (in this example, the number of stitches) related to

When the set key 24 on the operation panel 20 is operated, the CPU 21 sets a storage mode for storing the sewing pattern data corresponding to each sewing process and reads the program corresponding to the mode from the ROM 22. With
When the reproduction key 25 is operated, a reproduction mode for executing sewing based on the sewing pattern data is set, and the program corresponding to that mode is read from the ROM 22.

In each mode setting, when the pattern designation key 26 on the operation panel 20 is selected and operated, the CPU 21 designates the storage area of the RAM 23 corresponding to the pattern number on the key and writes the data to the storage area. Alternatively, reading is performed. In the storage mode setting, when the needle thread key 27 on the operation panel 20 is operated, the CPU 40 sets the needle selection mode and displays the preset needle number on the display unit 20a on the operation panel 20. When the needle number is changed by the subsequent operation of the plus key 28 and the minus key 29, the CPU 20 displays the change of the needle number and the needle 3 corresponding to the needle number is arranged at the stitch forming position. The CPU 21 drives the needle bar switching motor 5 via the output interface 30 and the motor control circuit 31, and stores the needle number in the RAM 23.

Further, when the presser foot key 32 on the operation panel 20 is operated in the memory mode setting, the CPU 21 sets the presser foot selection mode, and the preset presser foot number is displayed on the display section 20a on the operation panel 20. To do. When the presser foot number is changed by the subsequent operation of the plus key 28 and the minus key 29,
The CPU 21 displays the change of the presser foot number, and the CPU 21 controls the presser foot via the output interface 30 and the motor control circuit 33 so that the presser foot 14 corresponding to the presser foot number is arranged at the stitch forming position. The switching motor 9 is driven and the presser foot number is stored in the RAM 23.

When the stitch number key 34 on the operation panel 20 is operated in the state where the memory mode is set, the CPU 21 sets the stitch number control mode. When a start signal is input through the input interface 36 by operating the foot pedal 35, the CPU2
1 is the output interface 30 and the motor control circuit 37
The sewing machine motor 38 is driven via the to rotate the sewing machine main shaft. Then, when the sewing machine is operating, the needle position detector 39
The needle position detection signal output from is input to the CPU 21 via the input interface 36, and the CPU 21 counts the number of execution needles based on the needle position detection signal.

Now, the operation of the program sewing machine configured as described above will be described with reference to FIGS. 6 and 7.

FIG. 6 shows a state in which needles of different types such as colors and thicknesses are carried on the needles 3 and the presser foot 14 of different types is mounted on the presser foot attachment body 11 and then the power of the program sewing machine is turned on. When the set key 24 is operated in step S1 shown in
U21 sets the memory mode, and subsequently, when any one of the pattern designation keys 26 is operated in step S2, CPU21 causes RAM
Specify 23 predetermined storage areas. When the needle thread key 27 is further operated in step S3, the CPU 21 sets the needle selection mode, and subsequently in step S4, when the needle number is selected by operating the plus key 28 and the minus key 29, the CPU 21 displays the number. The needle bar switching motor 5 is driven to rotate while being displayed on 20a. As a result, the needle bar support case 2 is moved left and right, and the needle bar 4 corresponding to the previously selected needle number is
The upper needle 3 is arranged at the stitch forming position.

Next, when the presser key 32 is operated in step S5, the CPU 21
Sets the presser foot selection mode, and subsequently, in step S6, when the presser foot number is selected by operating the plus key 28 and the minus key 29, the CPU 21 displays the number on the display unit 20a and rotates the presser foot switching motor 9. To drive. As a result, the main body 12 of the presser foot switching motor 9 and the presser foot mounting body 11 are rotated, and the presser foot 14 corresponding to the previously selected presser foot number is arranged at the stitch forming position.

Next, when the stitch number key 34 is operated in step S7, the CPU 21
Sets the stitch count control mode. In that state, step S8
When the foot pedal 35 is operated in step S9, the CPU 21 drives the sewing machine motor 38 in step S9. Therefore, the main shaft of the sewing machine is rotated, the needle 3 is moved up and down, the thread catcher is operated, and the cooperation of the two forms a stitch on the work cloth. Also, as the sewing machine spindle rotates, the bed section
A feed dog (not shown) appears in and out of the work cloth supporting surface 6 from within 1b, and the work cloth is fed by the cooperation of the feed dog and the presser foot 14.

During operation of the sewing machine, the CPU 21 counts the number of execution stitches in step S10 based on the detection signal output from the needle position detector 39. Then, when the operation of the foot pedal 35 is released in step S11, the operation of the sewing machine is stopped in step S12, and in step S13, the number of the needle 3, the presser foot 14 previously selected, and the number of stitches required for sewing are selected. Is stored in the storage area of the RAM 23 as sewing pattern data.

By the above operation, for example, the needle 3, which carries the upper thread for sewing the pocket cloth piece to the cloth, the presser foot 14, and the data regarding the number of needles are stored as one set of sewing pattern data, and the label is put on the pocket cloth piece. Needle 3 carrying a needle thread of a different type from the above-mentioned needle thread for sewing and a presser foot 14 of a different type
The data relating to the number of stitches and the number of stitches can be stored as separate sewing pattern data.

Next, a case of performing sewing based on the stored data will be described. First, when the reproduction key 25 is operated in step S1 shown in FIG. 7, the CPU 21 sets the reproduction mode.
In this state, if the storage area of the RAM 23 for pocket piece sewing is specified by operating the pattern specifying key 26, the CPU 21 reads the sewing pattern data from it in step S3.

Then, based on the data regarding the needle 3 in the sewing pattern data, the CPU 21 drives the needle bar switching motor 5 to selectively place the predetermined needle 3 at the stitch forming position. When this process ends, the determination result of step S4 becomes YES, and the process proceeds to the next step S5. In this step S5, based on the data relating to the presser foot 14 in the sewing pattern data, the CP
U21 drives the presser foot switching motor 9 to move the predetermined presser foot 14
Is selectively placed at the stitch forming position. When this process ends, the determination result of step S5 becomes YES, and the operation of the foot pedal 35 is performed in the next step S6. When the foot pedal 35 is operated, in step S7, the CPU 21 starts sewing based on the set number of stitches in the sewing pattern data,
In S8, the number of stitches is counted as in the above case. Then, in step S9, when the count number of the number of stitches matches the set number of stitches in the sewing pattern data,
In S10, the sewing machine is stopped and the sewing of the pocket cloth pieces is completed.

Subsequently, when the presser foot 14 of a different type from the presser foot 14 is used and the label is sewn on the pocket cloth piece with the upper thread of a different type, as in the case described above,
Based on the program shown in the figure, if the reproduction key 25 and the pattern designation key 26 are sequentially operated to read out the predetermined sewing pattern data, the needle 3 and the presser foot 14 are automatically switched,
The needle 3 and the presser foot 14 can be used to perform labeling sewing.

As described above, in this embodiment, one program sewing machine can be equipped with a plurality of presser feet 14 of different types, and sewing can be performed by selectively using each presser foot 14 corresponding to a plurality of sewing processes. Can be executed. Further, since one sewing machine is responsible for various sewing processes, the function of the program sewing machine can be effectively utilized and the proportion of the installation space of the sewing machine in the sewing factory can be reduced.

The present invention is not limited to the above-described embodiment. For example, in a sewing machine having a cloth edge detector, the number of stitches required for sewing from the cloth edge detection to the cloth edge is stored as a part of the sewing pattern data. The stitch width from the cloth edge to the sewing stop position is input in advance, and the number of stitches from the detection of the cloth edge to the sewing stop position is stored as a part of the sewing pattern data based on the input data and feed pitch data. You can also do it.

(Effects of the Invention) As described in detail above, according to the present invention, one program sewing machine can be equipped with a plurality of presser feet of different types, and each presser foot is selectively used corresponding to a plurality of sewing processes. Sewing can be performed. Further, since one sewing machine takes charge of various sewing processes, the function of the program sewing machine can be effectively used and the ratio of the installation space of the sewing machine in the sewing factory can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a presser foot switching mechanism in a program sewing machine embodying the present invention, FIG. 2 is a view seen from the direction A in FIG. 1, and FIG. 3 is a partial front view of the sewing machine.
FIG. 4 is a front view of the operation panel, FIG. 5 is a block diagram showing the electrical configuration of the sewing machine, and FIGS. 6 and 7 are flowcharts. In the figure, 6 is a work cloth supporting surface, 9 is a presser foot switching motor, 11 is a presser foot mounting body (actuating means is constituted by 9 and 11), 14 is a presser foot, and 21 is control means.
CPU.

Claims (1)

[Claims] 1. A program sewing machine capable of preliminarily storing various information necessary for sewing a predetermined length and executing sewing based on the stored data is movably supported toward a stitch forming position, and the sewing is performed. A plurality of presser feet (14) for pressing the work cloth onto the work cloth supporting surface (6) in a state where the work cloth is selectively arranged at the stitch forming position, and one of the plurality of presser feet (14) is formed at the stitch forming position. And the operating means (9, 11) for selectively arranging the presser foot and the operating means (9, 11) on the basis of the stored data in order to dispose one presser foot (14) at the stitch forming position prior to the sewing operation. A program sewing machine, characterized by being provided with a control means (21) for controlling 11).