JP3813620B2 - Sewing machine with automatic controller operation function - Google Patents

Description

  The present invention relates to control of a sewing machine controller, and more particularly, to a sewing machine having an automatic operation function of a controller having efficiency and safety by controlling a speed during operation of the controller.

  Conventionally, there are two types of speed control for motor-driven sewing machines: a type that drives and stops at a specified speed, and a type that accelerates and decelerates the speed of the sewing machine motor by a stepping operation called a foot-type controller. Yes.

  In general, in sewing a sewn product, a straight line is not sewed, but a curved portion or a short portion is often sewed, so that manual operation is often required.

  In this point, the sewing operation by the controller in the stepping operation allows the sewing operation with both hands to be opened and allows the sewing operation with both hands to be freely changed, and the speed can be freely changed even in a fine part such as a complicated part. The speed was adjusted by stepping on and off. This made it possible to perform excellent sewing work.

In the operation by the controller capable of such an excellent sewing operation, depending on the sewing product, for example, when sewing a relatively long distance such as a curtain and a table center, the controller must be stepped on during the sewing. In this respect, a type in which a designated speed is determined and turned on / off by hand or finger is advantageous. In recent years, sewing machines that embroidery with a sewing machine in the automatic embroidery mode have become widespread, but these have a relatively large number of stitches, and a controller is required for several minutes to a dozen minutes to complete the pattern. Had to operate. As described above, there is an inconvenience that the controller must be stepped on when sewing for a long time at substantially the same speed, such as when a straight line portion continues. .
Further, there is a demand for the controller to be operated immediately in order to sew a short portion following the long distance even when sewing the long distance.

Therefore, the inventor has intensively and researched to solve the above problems, and as a result, the invention is driven by a sewing machine motor that is driven by speed control by a controller that converts an operation amount into an electric signal, and is operated by the controller. The same speed detecting means for detecting the same speed within a predetermined region, and a starting means for starting an automatic operation for maintaining the same speed based on a detection result by the same speed detecting means. An automatic speed storage means for storing a speed for automatically operating the sewing machine motor at the same speed, and a release means for canceling the automatic operation during the automatic operation to bring it to a normal operation, and maintaining the same speed. The problem is solved by operating the controller by operating the controller.
Also, a sewing machine motor that is driven by controlling the speed with a controller that converts an operation amount into an electric signal, and a same speed detection that detects the same speed signal that the speed within a predetermined time during operation by the controller is within a predetermined region. Means for starting automatic operation for maintaining the same speed based on a detection result by the same speed detection means, and speed storage means for storing a speed for automatically operating the sewing machine motor at the same speed An automatic signal that exceeds the operation amount at the time of an automatic operation command of the controller during the automatic operation that maintains the same speed is used as a cancellation signal for the automatic operation, and a canceling unit that cancels the automatic operation and makes the normal operation. The problem was solved by operating the automatic operation to maintain the automatic operation and the cancellation of the automatic operation by operating the controller.

  In the present invention, first, when sewing a long time at the same speed, and very efficient sewing work corresponding to various cases, secondly, it is easy to start / release automatic operation with a controller. In addition, there are effects such as efficient operation.

  To describe these effects in detail, in recent years, sewing machines that embroidery with a sewing machine in the automatic embroidery mode have become widespread, but these have a relatively large number of stitches, and it takes several minutes to complete the pattern. There were cases where sewing was performed for a long time at approximately the same speed, such as when the controller had to be stepped on for more than a dozen minutes, or when the straight line portion continued, but the present invention has means for starting automatic operation. For this reason, sewing operations can be performed as automatic operation at a constant operation speed without any operation by hand or foot, which eliminates the hassle of having to step on the controller during automatic operation as in the past. , Extremely efficient sewing work. As a result, there is also an advantage that the fatigue level of the worker can be minimized.

  In addition, depending on the sewing, there is a case where even if the sewing is performed for a long distance as described above, it is desired to perform a manual operation immediately by performing a variable operation by the controller in order to sew a short portion following the distance. If you want to switch from automatic operation to controller operation, there is a release means for canceling automatic operation of the sewing machine motor to normal operation, so you can immediately cancel the automatic operation, sew a short part, then long In such a case, sewing can be performed again by automatic operation, and even in such a case, there is an effect that extremely efficient sewing work can be performed.

  In addition, since the means for starting automatic operation and the release means for canceling automatic operation are configured to operate by operating the controller, both automatic operation start and release are extremely operated by stepping on the controller. There is an advantage that it is easy to operate and can be operated efficiently.

During the operation of the sewing machine, the operation amount is converted into an electric signal for driving control to the normal variable speed control by the controller and the automatic operation speed control which is the speed control to keep the speed during the controller operation constant. A speed storage means for automatically operating at an automatic operating speed, which is a controller, a sewing motor that is driven by controlling the speed according to an operation amount of the controller, and a speed control that maintains the speed during operation of the controller constant. And the subject was solved by providing the starting means for starting automatic driving | operation, and the cancellation | release means which cancels | releases automatic driving | operation and sets it as normal driving | operation.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 3 is a schematic view of the present invention. The sewing machine is pre-installed with a computer program and is configured to be capable of various types of embroidery by a control device including a central processing unit (CPU) 2. Possible embroidery sewing machines are included.

  The sewing machine frame 1 is provided with a pattern selection means 3 having a pattern selection key 3a for selecting various built-in patterns. A sewing machine motor 4 as a known drive motor is built in the sewing machine frame 1.

  The controller 5 is configured as a stepping type that controls the speed of the sewing machine motor 4. The controller 5 incorporates conversion means 5a for converting an operation amount into an electric signal.

  The drive circuit 6 is configured to drive the sewing machine motor 4 based on a speed control signal from the controller 5.

  The same speed detecting means 7 is used when the increase / decrease of the same speed (number of revolutions) of the sewing machine motor 4 or a current value (current amount) signal corresponding to the speed is within a predetermined region within a predetermined time by the timer means 8. The value immediately after the detection is detected as the same speed, and is connected to the central processing unit (CPU) 2. That is, as a step before automatic driving, when the controller 5 is operated and, for example, a substantially constant speed is reached within a predetermined time, it is detected as the same speed.

  Specifically, the first measured value of the predetermined time by the timer means 8 and the last measured value of the predetermined time by the timer means 8 are output only when the speed fluctuation within the predetermined range is detected by the speed fluctuation comparing means 9. The output speed signal can be measured as the same speed by the same speed detection means 7.

  The start operation means 10 is for starting the sewing machine motor 4 to automatically operate at an arbitrary predetermined speed. The start operation means 10 is built in the controller 5 and is automatically operated based on the detection result by the same speed detection means 7. The The start operation means 10 is configured to operate by a stepping operation of the controller 5.

  The speed detection means 11 is configured to detect the speed (number of revolutions) of the sewing machine motor 4 or a current value (current amount) corresponding to the speed, and is connected to the central processing unit (CPU) 2.

  The speed storage means 12 (means for storing the number of revolutions or means for storing the current amount) is means for storing the automatic operation speed immediately after the automatic operation is started. It is built in the sewing machine frame 1 for automatic operation at an arbitrary speed.

  The automatic operation command means 13 is for commanding a speed that is automatically operated and stored, and is connected to a central processing unit (CPU) 2.

  The automatic operation speed detected by the speed detection means 11 during the automatic operation is compared with the storage speed stored in the speed storage means 12 when the automatic operation is performed, and only when both are the same speed. The automatic operation command means 13 determines the automatic operation to continue. That is, the automatic operation speed is configured to match the storage speed. This is for maintaining the stored automatic operation speed even when the automatic operation speed is changed for some reason, and a feedback circuit is configured.

  Automatic operation is self-maintained by the speed detecting means 11, the speed storage means 12, and the automatic operation command means 13 that perform such operations. With this configuration, the automatic operation speed can be accurately and safely.

  Further, immediately after the automatic operation is started, the automatic operation speed stored in the speed storage unit 12 may be held as a constant output by the automatic operation command unit 13. The automatic operation command means 13 may hold the automatic operation by itself.

  The canceling means 14 is a means for canceling automatic operation of the sewing machine motor 4 and changing to normal operation. That is, an electric signal exceeding the operation amount at the time of the command of the controller 5 after the automatic operation command is used as a cancel signal of the automatic operation, and the automatic operation is canceled and the normal operation is performed. It is connected.

  Specifically, after the automatic operation, when the speed (operation amount) operated at the present time exceeds the speed stored in the speed storage means 12, the central processing unit (CPU) 2 The automatic operation is canceled by the speed comparison means 15 provided in the above, and the operation is changed to normal operation. The release means 14 is configured to operate by a stepping operation of the controller 5.

  When the stepping amount is suddenly increased at the time of the release, rotation of the sewing machine motor 4 is increased. Therefore, appropriate speed safety means for reducing the increase amount may be provided.

  In the case of an emergency stop, the operation is performed by a stop switch 16 provided at a position of the jaw 1a of the sewing machine frame 1.

  Next, the operation will be described based on the flowchart shown in FIG. 2. First, the power is turned on, the sewing machine operation is turned on (see S1), the controller 5 is operated (see S2), and the sewing machine motor 4 is driven. (See S3). Then, it is determined whether or not the speed is within a certain area (see S4). If the speed is within the certain area, it is determined whether or not a predetermined time has elapsed (see S5), and this is the same speed (see S5). Automatic operation speed), and based on the detection result, the starting operation means 10 for starting the automatic operation operates to automatically operate at an arbitrary predetermined speed. As a result, normal sewing or embroidery sewing can be automatically performed at a predetermined speed.

At this time, the speed (number of rotations) of the sewing machine motor 4 during the automatic operation or the current value (current amount) corresponding to the speed is stored (see S6). Further, the speed (number of rotations) of the sewing machine motor 4 or a current value (current amount) corresponding to the speed is detected (see S7).
If the driving speed is the same as the stored speed, the automatic driving is continued (see S8).
. That is, feedback is made so that the operating speed matches the stored speed.

  Next, when the controller 5 is further depressed (see S9) and the sewing machine operator operates the release means 14 so that the speed is higher than the speed of automatic driving at the stored speed (see S10), the sewing machine The automatic operation of the motor 4 is canceled and the operation is changed to normal operation (see S11). Then, it is examined whether or not to end the operation (see S12). If it is desired to end the operation, the operation is ended.

  Further, when the sewing machine operator operates the release means 14 at a speed slower than the automatic driving speed at the stored speed (see S10), the automatic driving is not canceled and the feedback is performed so that the automatic driving speed is detected again. (See S7).

  The sewing machine sewing work is completed by repeating part or all of these operations. Of course, automatic operation may not be performed.

Block diagram of the present invention Flowchart diagram of the present invention Schematic diagram of the present invention

Explanation of symbols

  1: sewing machine frame, 2: central processing unit, 4: sewing machine motor, 5: controller, 5a: conversion means, 6: drive circuit, 7: same speed detection means, 10: start operation means, 11: speed detection means, 12: Speed storage means, 13: Automatic operation command means, 14: Release means

Claims (2)

A sewing machine motor that is driven by controlling the speed with a controller that converts an operation amount into an electrical signal; and a speed detection means that detects the same speed within a predetermined region during a predetermined time during operation by the controller; Starting means for starting automatic operation for maintaining the same speed based on a detection result by the same speed detecting means; speed storage means for storing a speed for automatically operating the sewing machine motor at the same speed; and automatic operation An automatic operation function of the controller, wherein the automatic operation for maintaining the same speed is operated by operating the controller. Sewing machine. A sewing machine motor that is driven by controlling the speed with a controller that converts an operation amount into an electric signal, and a same speed detecting means that detects a same speed signal within a predetermined region during a predetermined time during operation by the controller. , A starting means for starting an automatic operation for maintaining the same speed based on a detection result by the same speed detecting means, and a speed storage means for storing a speed for automatically operating the sewing machine motor at the same speed. A canceling means for canceling the automatic driving and using the electric signal exceeding the operation amount at the time of the automatic driving command of the controller during the automatic driving for maintaining the speed as a canceling signal for the automatic driving to make the normal driving, and maintaining the same speed. With the automatic operation function of the controller, the automatic operation and the cancellation of the automatic operation are operated by operating the controller. Sewing machine.

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