JPH0538702Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to the control of an embroidery frame drive device of a sewing machine capable of embroidering.

(Background) In recent years, it has become desirable for sewing machines to have more versatile sewing functions, and it has been proposed to have embroidery sewing functions in addition to regular sewing functions.

However, even if the embroidery frame is removed when performing normal stitching following embroidery stitching, if the support for supporting the embroidery frame is on the bed surface, it will interfere with normal stitching. Therefore, it is necessary to retreat the support to a predetermined position where it does not get in the way.

Also, when performing embroidery stitching following normal stitching, the sewing needle should be placed at a predetermined position on the embroidery frame (for example, the center position of the embroidery frame or the last stop position in the previous embroidery mode) to make it easier to start embroidery. It is desirable to return it from the above-mentioned retracted position so that it will move.

(Prior Art and its Problems) Conventionally, a retraction operation was performed by switching from embroidery stitching to normal stitching, and a return operation was performed by switching from normal stitching to embroidery stitching.

For this reason, when retracting the embroidery frame with the embroidery frame covering an area smaller than the maximum movement of the support, depending on the stop phase of the upper shaft of the sewing machine, the embroidery frame, needle, presser foot, etc. There is a risk of interference. In addition, regarding the return operation, if you attach an embroidery frame that covers an area smaller than the maximum movement of the support to the support first, and then switch from normal sewing to embroidery sewing, the embroidery frame may change depending on the stop phase of the upper shaft of the sewing machine. If the needle, presser foot, etc. are left attached, there is a risk that the embroidery frame and presser foot may interfere with each other.

When these phenomena occur, not only can the product be damaged, but the user may also be injured.

(Solution) The present invention uses the following three methods to perform the evacuation operation described above.
The embroidery frame is always removed during the return operation to eliminate interference between the embroidery frame and the needle or presser foot.

1 Using an embroidery frame detection device that determines whether the embroidery frame is connected to the support, if the embroidery frame comes off when switching stitches, it will immediately retreat or return, and if the embroidery frame has not come off, it will display a message. The embroidery frame is supported by the device so as to be removed, and the embroidery frame is retracted or returned to its original position.

2. When switching stitches, instruct the display device to remove the embroidery frame, press a predetermined key after removing the embroidery frame, and perform the retracting operation or return operation when this key is pressed.

3. An electromagnet is used to connect the embroidery frame to the support, and when switching from embroidery stitching to normal stitching, the electromagnet is de-energized and retracted.

When switching from normal sewing to embroidery sewing, the electromagnet is energized after the return operation.

(Example 1) Embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a state in which the support 1 is retracted from the bed surface 2 so as not to get in the way during normal sewing.

3 is a switching dial for switching between embroidery and regular sewing patterns.

When you select something other than "embroidery" with the switching dial 3, the feed dog (not shown) rises, and the presser foot 4 for normal sewing allows you to feed the fabric you want to sew back and forth, and the needle bar 5 swings left and right. The sewing needle 6 then performs normal sewing on the cloth.

Figure 2 shows support 1 to make it easier to start sewing embroidery.
7 is a diagram showing a state in which the embroidery frame 7 is attached after the sewing needle 6 has returned from the retracted position to a position corresponding to the center of the embroidery frame 7. FIG.

When the switching dial 3 is set to ``Embroidery'', the feed dog is lowered below the throat plate surface 8 to prevent fabric from being fed, the needle bar 5 becomes perpendicular to the throat plate surface 8 (M base line), and the presser foot 9 for embroidery sewing is moved. is linked to the movement of the sewing needle 6, and when the sewing needle is above the cloth, the presser foot 9 also rises above the throat plate surface 8, and when the sewing needle is stuck in the cloth, the presser foot is lowered to the throat plate surface 8. It's on.

10 is a display device which instructs the user about embroidered characters and operation messages.

Numeral 11 is a key for selecting and storing embroidery characters, manually setting the embroidery position, and specifying the start and stop of embroidery.

Reference numeral 12 denotes a memory card that stores embroidery data, which will be described later.

FIG. 4-a shows an embroidery frame detection device 13 for realizing the safety drive device of claim 1 of the registered utility model claim.
and a detailed view of the embroidery frame 7 at a position opposite to the embroidery frame 7.
The embroidery frame mounting plate 15 is fixed to the embroidery frame 7.

In FIG. 4-b, the cover of the support body 1 has been removed, and the micro switch etc. linked to the lever 14 can be operated.

FIG. 4-c is a diagram in which the embroidery frame is connected to an embroidery frame detection device.

Figure 6 is a system block diagram showing the data bus line (BL) from the microcomputer (CPU).
has a ROM that stores the sewing machine control program.
(ROM), RAM as a temporary storage device for data
(RAM), a sensor (SEN) to obtain various signals for controlling the sewing machine via the input/output device (I/O1), and a sensor (SEN) for obtaining various signals for controlling the sewing machine via the input/output device (I/O2), such as selecting embroidery patterns, etc. A display device 1 that notifies the user of the selected embroidery pattern etc. via the input/output device (I/O3).
0. Sewing machine motor (ZMOTOR) that moves the sewing needle 6 up and down via the input/output device (I/O4) and drive device (DV), actuator (XMOTOR) that moves the support body 1, (YMOTOR), and other embroidery. An actuator (ACT) necessary for embroidery, a built-in memory (MEMO1) that stores embroidery data, and a memory card 12 that is a removable external memory are connected. The built-in memory (MEMO1) stores embroidery data of general-purpose characters and symbols such as alphanumeric characters and kana, and the memory card 12 stores individual characters, such as the user's and his or her family's name (kanji), and one-point patterns. Embroidery data such as the following are stored.

Due to space limitations in the sewing machine body, embroidery data for general-purpose characters and symbols may also be stored in a mask ROM type memory card.

Address bus lines and control bus lines are omitted.

An embroidery frame detection device 13 that detects whether the embroidery frame 7 is connected to the support 1 is included in the sensor (SEN).

The operation of the above configuration will be explained based on the flowchart and FIGS. 7 and 8.

Figures 7 and 8 are the first claims for utility model registration.
ROM with the flowchart corresponding to Section 2.
This is a detailed description of the evacuation and return operation programs for the support body 1 among the sewing machine control programs stored in the (ROM).

FIG. 7 will be explained.

Normally, in step (b), it is determined whether it is embroidery stitching or normal stitching, and each process is executed.

When switching dial 3 is switched from embroidery stitching to normal stitching pattern or from normal stitching pattern to embroidery stitching, the process branches at step (a), and if the sewing machine motor (ZMOTOR) is running at step (e), the needle is raised. At step (j), the embroidery frame detection device 13 determines whether the embroidery frame 7 is connected to the support 1, and if the embroidery frame 7 is connected, the display device 10 displays the message to remove the embroidery frame 7. After it is removed, proceed to the next step (f).

In step (f), the type of stitching after switching is determined.

For embroidery sewing, the support body 1 is returned to its original position in step (g), and the embroidery sewing process (d) is executed.

For normal sewing, perform a retraction operation in step (h) and execute normal sewing processing (c).

When the power is turned on, the embroidery frame detection device 1 detects whether the embroidery frame 7 is connected to the support 1 in step (i).
3, if the embroidery frame 7 is connected, the display device 10 is instructed to remove the embroidery frame 7, and after the embroidery frame 7 is removed, the actuator (X, YMOTOR) is initialized, and the above-mentioned (f) ) Proceed to step ).

FIG. 8 is a flowchart corresponding to claim 2 of the utility model registration, and to explain only the differences from FIG. For example, it instructs the user to press the start key.

After a predetermined key is pressed, proceed to the next step (f).

(Example 2) Example 2 of the present invention will be described based on the drawings.
The present invention is comprised of FIGS. 1, 2, 3, 5, 6, and 9, and the parts explained in the first embodiment are omitted.

FIG. 5 shows an electromagnet 23 attached to the support 1.
and a detailed view of the embroidery frame 7 at the corresponding position, and in this figure, the cover of the support 1 is removed. The embroidery frame 7 is fixed to an embroidery frame mounting plate 25 made of a magnetic material. The electromagnet 23 for attaching and detaching the embroidery frame 7 is an actuator (ACT).
included in.

The operation of the above configuration will be explained based on the flowchart of FIG. 9.

This flowchart is a detailed description of the evacuation and return operation programs for the support body 1 among the sewing machine control programs stored in the ROM. Normally, in step (b), it is determined whether it is embroidery stitching or normal stitching, and each process is executed.

When switching the switching dial 3 from embroidery stitches to normal stitching patterns, or from normal stitching patterns to embroidery stitches, the process branches at step (a), and if the sewing machine motor (ZMOTOR) is running at step (e), the needle Stop at the top and determine the type of stitching after switching in step (f).

For embroidery stitching, the support body 1 is returned to its original position in step (g), and finally the electromagnet 23 is energized so that the embroidery frame 7 can be attached, and the embroidery stitching process (d) is executed.
For normal sewing, in step (h), the electromagnet 23 is first de-energized, the embroidery frame 7 is removed and retracted, and the normal sewing process (c) is executed. When turning on the power, first de-energize the electromagnet 23 in step (i), then initialize the actuator (X, YMOTOR),
Proceed to step (f) mentioned above.

(Effects) As can be seen from the above explanation, when switching to embroidery stitching or normal stitching, the embroidery frame 7 must be lower than the support body 1 when retracting, returning, and initial setting operations of the support body 1 are performed so that sewing can be started immediately. Since I made it a condition that the embroidery frame 7, the sewing needle 6, and the presser foot 4 and 9
It is safe and does not interfere with the

[Brief explanation of the drawing]

FIG. 1 shows a state in which the support is retracted to the bed surface during normal sewing. FIG. 2 is a diagram showing the embroidery frame attached for embroidery sewing. Fig. 3 is a diagram showing selection and storage of embroidery characters, manual setting of embroidery position, start of embroidery, and stop key; Fig. 4 is a detailed view of the embroidery frame facing the embroidery frame detection device of the first embodiment;
Fig. 5 is a detailed view of the embroidery frame facing the electromagnet attached to the support body in Embodiment 2, Fig. 6 is a system block diagram, Figs. 7 and 8 are flowcharts of Embodiment 1, and Fig. 9 The figure is a flowchart of Example 2. 7 in Figure 4 is an embroidery frame, 13 is an embroidery frame detection device, 10 is a display device in Figure 2, and 23 in Figure 5
is an electromagnet.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cloth feeding device that feeds the cloth in a direction perpendicular to the swinging direction of the sewing needle, a support body that removably supports an embroidery frame, and embroidery by driving the support body. a driving device for moving the embroidery frame between a sewing execution position and a withdrawal position; a first mode for performing normal sewing by the cloth feeding device; and a driving device for moving the embroidery frame relative to the sewing needle by the driving device. a second mode for performing embroidery stitches, the sewing machine comprising: a switching means for selectively switching the sewing machine between the first mode and the second mode by operation; and a selective switching operation of the switching means. embroidery frame detection means that responsively determines that the embroidery frame is connected to the support body and generates a first signal; and determines that the embroidery frame is not connected and generates a second signal; The first embroidery frame detection means
a display means which becomes active in response to a signal from the embroidery frame and instructs to remove the embroidery frame; and a display means which operates in response to the removal of the embroidery frame to drive the drive device to move the support body to the embroidery execution position. and control means for moving the sewing machine from the exit position to the withdrawal position. (2) After the embroidery frame is removed, the display means instructs to press a predetermined key, and in response to the key press, the drive device operates to move the support to the retreat position. A safety drive device for an embroidery-capable sewing machine according to claim 1, characterized in that: (3) The embroidery frame detection means includes an electromagnet for holding the embroidery frame on a support, and when the switching means is switched from the embroidery sewing mode to the normal sewing mode, the electromagnet becomes de-energized and the embroidery frame is held in place by the embroidery frame. is released from the support, and the control means drives the drive device in response to non-excitation of the electromagnet to move the support from the embroidery execution position to the withdrawal position. A safety drive device for a sewing machine capable of embroidering as claimed in claim 1.