JP2901700B2 - Embroidery sewing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an embroidery sewing machine that automatically and safely restarts an embroidery operation interrupted by a power failure such as a power failure.

[Related Art] In a conventional embroidery sewing machine, when a power failure occurs during an embroidery operation and the embroidery operation is interrupted, the embroidery operation is restarted in the following procedure.

First, the embroidery frame is moved to the mechanical origin. Then, based on the embroidery data for which processing has been completed, a movement amount from the mechanical origin position to a position at which the processing has been interrupted (hereinafter referred to as a processing interruption position) is calculated, and the embroidery frame is moved by that movement amount.

Thereby, the embroidery operation can be restarted from the processing interruption position.

[Problems to be Solved by the Invention] In the conventional embroidery sewing machine, when restarting the embroidery operation interrupted due to a power failure, the embroidery frame is always moved to the mechanical origin.

However, in general, the mechanical origin of the embroidery frame is set at the extreme end determined by the mechanical structure of the embroidery frame moving mechanism, and when the embroidery frame is located at this mechanical position, the displacement of the embroidery frame is detected. Resetting the counter etc.

For this reason, when the embroidery operation interrupted due to the power supply abnormality is restarted, the embroidery frame is driven by a large amount of movement, and there is a possibility that a collision accident of the sewing needle of the embroidery frame or an unexpected accident to the operator may occur.

The present invention has been made to solve the above problems,
An object of the present invention is to provide an excellent embroidery sewing machine capable of restarting the embroidery operation safely, quickly, and reliably by a minimum movement of the embroidery frame when the embroidery operation is interrupted due to a power failure. .

[Means for Solving the Problems] In order to solve the above problems, the embroidery sewing machine according to the present invention comprises, as shown in the basic configuration diagram of FIG. 1, a sewing needle which uses an electric motor as a power source and cooperates with a shuttle. Means for moving the embroidery cloth T up and down, and using an electric motor as a power source, changing the relative positional relationship of the embroidery cloth T with respect to the sewing means C1 in synchronization with the operation of the sewing means C1, thereby forming an embroidery pattern on the embroidery cloth T. An embroidery sewing machine having an embroidery cloth moving means C2 to be created; a movement position detection means C3 for detecting a movement position of the embroidery cloth T by the embroidery cloth movement means C2 as a displacement amount from a predetermined mechanical origin. A movement position storage means C4 for storing the detection result of the movement position detection means C3 in a predetermined power-backed storage area.
When the power supply to the embroidery sewing machine is interrupted during the creation of the embroidery pattern by the sewing means C1 and the embroidery cloth moving means C2, at the start of re-energization, the embroidery cloth moving means C2 stopped by the power supply interruption. The stop position is compared with the movement position stored by the movement position storage means C4, and when both positions are shifted, the position is returned directly from the stop position to the movement position stored by the movement position storage means C4. Then, the embroidery cloth moving means C2 is operated to restart the interrupted embroidery pattern creation work, and when the two positions match, the interrupted embroidery pattern creation work is immediately restarted. And characterized in that:

[Effect] The embroidery sewing machine of the present invention uses an electric motor as a power source for sewing.
The embroidery cloth moving means C2 operates. The position of the embroidery cloth T moved by the operation is determined by the movement position detecting means.
It is detected as a displacement amount from a predetermined mechanical origin by C3, and is stored in a predetermined storage area backed up by a power supply by a movement position storage means C4.

Therefore, the embroidery work is interrupted when the power supply is cut off due to a power failure or the like, but the position of the embroidery cloth T at that time is kept stored in a predetermined storage area backed up by a power supply.

Then, when re-energization of the embroidery sewing machine is started, the automatic resuming means C5 operates, and the stop position of the embroidery cloth moving means C2 stopped by the interruption of the power supply and the movement position stored in the movement position storage means C4. When the two positions are deviated, the embroidery pattern interrupted after activating the embroidery cloth moving means C2 so as to directly return from the stop position to the moving position stored in the moving position storage means C4. The embroidery pattern creation operation is resumed, and when both positions match, the interrupted embroidery pattern creation operation is immediately resumed. That is, when the embroidery is resumed, the embroidery cloth moving means C2 is returned to the mechanical origin without performing an operation such as temporarily returning to the moving position stored in the moving position storage means C4. Only the cloth moving means C2 is moved. As a result, the creation of embroidery patterns interrupted by a power failure
The operation can be resumed by the minimum operation of the embroidery cloth moving means C2.

Hereinafter, in order to more specifically describe the embroidery sewing machine of the present invention, an example will be described in detail.

[Embodiment] FIGS. 2 and 3 are explanatory views of the configuration of an embroidery sewing machine according to an embodiment of the present invention. As shown in FIG. In order to sew an embroidery pattern, the input embroidery data is analyzed by the driver unit 30 to create known one-needle data, and a sewing needle is selected from the sewing needles 40 and moved up and down, and synchronized with the vertical movement. Then, the movement of the embroidery frame 50 in the XY directions is controlled.

FIG. 3 is a detailed configuration block diagram of the driver unit 30. In the figure, a needle changing motor 32 is a power source for selecting an arbitrary one of the multi-needles on each head. The sewing motor 34 is the needle changing motor 32
For moving the sewing needle 40 selected by
The main shaft connected to the selected sewing needle 40 via a crank mechanism is rotated, and the sewing needle 40 is moved up and down at a predetermined speed.

The electromagnetic actuators 35a and 35b are built in each head, and release the mechanical connection between the main shaft rotated by the sewing motor 34 and the sewing needle 40 selected by the needle changing motor 32 when the excitation state is established. Then, the vertical movement of the sewing needle 40 is stopped. Thereby, the embroidery operation can be performed only on an arbitrary head.

The X-axis motor 36 and the Y-axis motor 38, which are stepping motors, are power sources for moving the embroidery frame 50 in the X-axis direction and the Y-axis direction. As is well known, X-axis motor
36 moves the embroidery frame 50 by one unit distance in the X direction each time a step signal is input, and the Y-axis motor 38 moves the embroidery frame 50 by one unit distance in the Y direction each time a step signal is input. In such a manner, the belt for moving the embroidery frame 50 is rotationally driven via a pulley or the like.

In order to detect the current position of the moving embroidery frame 50, there are provided a counter 53X for counting the amount of movement in the X direction and a counter 53Y for counting the amount of movement in the Y direction. The counter 53X is reset when the embroidery frame 50 is at the mechanical origin in the X direction. Each time the embroidery frame 50 moves one unit distance in the positive direction of the X axis, the counter value is incremented by one, and the counter value in the negative direction of the X axis is changed. The count value is decremented by one every time the unit moves one unit distance. Similarly, the counter 53Y is reset when the embroidery frame 50 is at the mechanical origin in the Y direction, and increments or decrements the count value each time the embroidery frame 50 moves one unit distance in the positive or negative direction of the Y axis. That is, this counter 53
The count values of X and 53Y represent the displacement of the embroidery frame 50 with respect to the mechanical origin. Since the count value is backed up by the built-in battery, the count value is held irrespective of ON / OFF of the main power supply of the embroidery sewing machine 10.

As shown in FIG. 3, a driver unit 30 of the embroidery sewing machine is connected to a controller 20 operated by a user, and a central microcomputer is used to operate while analyzing embroidery data input from the controller 20. It is configured as a digital logic circuit. Therefore, the driver unit 30 is provided with a CPU 3 for executing arithmetic and logical operations.
0A, a ROM 30B for storing various programs, and a RAM 30C for temporarily storing information. The RAM 30C has a configuration in which a part of the storage area is backed up by a power supply, and the contents stored in this area are held irrespective of ON / OFF of the main power supply of the embroidery sewing machine 10.

The various motors described above, that is, the motor controllers 30D to 30F that output drive signals of the X-axis motor 36, the Y-axis motor 38, the needle changing motor 32, and the sewing motor 34 for moving the embroidery frame 30 in the XY directions, The excitation phase of the motor is appropriately changed according to the control signal from the CPU 30A, and the motor is rotated at a desired speed at a desired rotation angle. Excitation circuit 30Ga, 30G
In b, an excitation current is passed through each of the electromagnetic actuators 30a and 30b in response to a control signal from the CPU 30A, and the electromagnetic actuators 30a and 30b are appropriately excited. Also, I / O port 30H
Enables transmission and reception of information between the counters 53X and 53Y and the CPU 30A.

The driver unit 30 configured as described above analyzes the embroidery data input from the controller 20 as the storage contents of the ROM 30B as is well known, and controls the various motors described above and the control signals of the excitation circuits 30Ga and 30Gb. To create
An embroidery work execution program for outputting the control signal to each controller and the excitation circuit at a predetermined timing is stored in advance.

FIG. 4 is a flowchart showing a schematic flow of the embroidery work execution program. As shown in the figure, when the processing by the embroidery work execution program is started by the CPU 30A, first, the embroidery data of the embroidery pattern requested this time is input from the controller 20 (step 100).
This embroidery data is converted into one-needle data suitable for the embroidery sewing machine of this embodiment, and is stored in the RAM 30C (step 11).
0). Then, the single stitch data thus stored in the RAM 30C is sequentially output to the various controllers 30D to 30F (step 12).
0), actually start the embroidery work.

Next, as conditions necessary for the embroidery work to be successfully continued, diagnosis of a system power supply voltage, various diagnoses such as self-diagnosis of the driver unit 30 and confirmation of an interruption command input by an operator in the event of a problem occur. (Step 130), if it is determined that some trouble has occurred and it is necessary to stop the embroidery work (Step 140), an interruption process for stopping the embroidery work (Step 150) is executed and "pause" is executed. "State.

Here, the interruption processing is the current count value [X of the counters 53X and 53Y, which is various information necessary for restarting the embroidery work.
p, Yp], the internal state of the controller such as the current output state of the single stitch data is stored in the power-backed-up storage area of the RAM 30C, and the embroidery operation is stopped. This is called a “pause” state, which is distinguished from an “end” state at the end of the program described later.

If it is determined in step 140 that no abnormality or a stop request has been issued, then it is determined whether or not all the stitch data has been output and the embroidery operation has been completed. When it is determined that the process is completed (step 160), the stored one-needle data is cleared, and the process shifts to the "end" state in which the motor controllers 30D to 30F are initialized. On the other hand, if the result of the determination in step 160 is negative and it is determined that the embroidery operation has not yet been completed, the process proceeds to step 120 in order to output unstitched one-needle data, Repeat the embroidery work.

As described above, when a system power supply abnormality occurs during the execution of the embroidery operation, the embroidery sewing machine 10 is maintained in the “pause” state. Then, when the system power is restored and the embroidery work becomes possible, if the operator starts the power return program described below, the embroidery sewing machine 10 is set to “pa
It can be controlled from the "use" state to the execution state of the embroidery work execution program.

FIG. 5 is a flowchart of the power return program. When this program is started, the storage area of the power supply backed up in the RAM 30C is accessed, and the internal state of the controller stored by the interruption processing at the time of power failure (step 150) is read (step 200). Then, in order to grasp the current position of the embroidery frame 50, the counters 53X and 53Y are used.
The current count value [X, Y] is read from
0), it is determined whether or not the count value matches the count value [Xp, Yp] stored as the controller internal state (step 2).
20).

If the embroidery frame 50 is moving for some reason between the occurrence of the system power failure and the recovery of the power, the determination in step 220 is negative. Therefore, in this case, a control signal is immediately output to the XY motor controller 30D to drive the embroidery frame 50 (step 230), and the step 2 is executed again.
The process of returning to 10 is repeated until the count value [X, Y] matches the stored count value [Xp, Yp].

When the determination in step 220 is affirmative,
That is, when the position where the embroidery operation is interrupted due to the occurrence of an abnormality in the system power supply matches the current position of the embroidery frame 50,
The other information saved in the RAM 30C as the controller internal information is transferred to another program or the like that requests transfer for resuming the embroidery operation (step 240), and the process returns to the embroidery operation execution program to resume the embroidery operation. With this process, the controller 30 returns to the same state as when the system power supply abnormality occurred, and can continue the suspended embroidery work.

As described above in detail in the embodiment, according to the embroidery sewing machine of this embodiment, when the embroidery operation is interrupted due to a power failure, the internal state of the controller at that time is immediately stored in the storage area of the backed-up RAM 30C, and the power is restored. The interrupted embroidery work is automatically resumed by the power return program executed at the time.

Moreover, when the embroidery operation is restarted, it is necessary to move the embroidery frame 50 to the position where the system power supply abnormality has occurred. This movement is realized by directly driving the embroidery frame 50 from the current position to the position where the abnormality has occurred. Therefore, the amount of movement of the embroidery frame 50 is small and the embroidery operation can be performed quickly and safely, and the embroidery operation can be restarted safely and without any possibility of an accident such as a collision between the embroidery frame 50 and the sewing needle 40. .

It should be noted that the present invention is not limited to the above embodiment at all, and can be embodied in various forms without departing from the gist thereof. For example, in the above-described embodiment, the configuration is described in which the operator starts the power return program (FIG. 5) in order to restart the embroidery work. However, the processing may be automated. That is, when power is supplied to the embroidery sewing machine 10, a predetermined area of the RAM 30C is read out, and when the internal state of the controller is stored therein, it is determined that a power supply abnormality has occurred previously, and automatically. The process of the power return program may be started.

[Effect of the Invention] In the embroidery sewing machine of the present invention, the sewing means and the embroidery cloth moving means operate using the electric motor as a power source, and the position of the embroidery cloth moved by the operation is determined by a movement position detecting means from a predetermined mechanical origin. It is detected as a displacement amount and stored in a predetermined storage area backed up by a power supply by a movement position storage means.

Therefore, the embroidery work is interrupted when the power supply is cut off due to a power failure or the like, but the position of the embroidery cloth at that time is kept stored in a predetermined storage area backed up by a power supply, and when re-energization is started, the automatic restart means is activated. The embroidery cloth moving means is operated so as to reproduce the moving position stored in the moving position storing means.

This makes it possible to resume the embroidery pattern creation operation interrupted due to a power failure due to the minimum operation of the embroidery cloth moving means, and to safely, quickly and surely restart the embroidery operation. Becomes a sewing machine.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram showing a basic configuration of an embroidery sewing machine of the present invention, FIG. 2 is a schematic configuration diagram of an embroidery sewing machine according to an embodiment,
FIG. 3 is a block diagram of the driver unit, FIG. 4 is a flowchart of an embroidery work execution program executed in the embroidery sewing machine, and FIG. 5 is a flowchart of a power return program executed at the time of power return. 20: Controller, 30: Driver unit 36: X-axis motor, 38: Y-axis motor 53X, 53Y: Counter 40: Needle, 50: Embroidery frame

Continuation of the front page (56) References JP-A-59-125595 (JP, A) JP-A-3-68393 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D05B 21 / 00 D05C 5/00-5/06 D05C 13/02

Claims (1)

(57) [Claims] 1. A sewing machine which uses a motor as a power source to move up and down sewing needles cooperating with a shuttle, and a motor as a power source which synchronizes the relative positional relationship of the embroidery cloth with the sewing means in synchronization with the operation of the sewing means. Embroidery sewing machine having an embroidery cloth moving means for creating an embroidery pattern on the embroidery cloth by changing the position of the embroidery cloth. The movement position of the embroidery cloth by the embroidery cloth movement means is detected as a displacement amount from a predetermined mechanical origin. A moving position detecting means, a moving position storing means for storing a detection result of the moving position detecting means in a predetermined storage area backed up by a power supply, and an embroidery sewing machine for creating an embroidery pattern by the sewing means and the embroidery cloth moving means. When the power supply is interrupted, when the re-energization is started, the stop position of the embroidery cloth moving means stopped by the power supply interruption and the movement position storage means are stored. The moving position is compared with the moving position, and when both positions are shifted, the embroidery cloth moving means is operated so as to directly return from the stop position to the moving position stored in the moving position storage means, and then the interruption is performed. An automatic resuming means for resuming the operation of creating the embroidered pattern and restarting the interrupted operation of creating the embroidered pattern immediately when the two positions coincide with each other.