JPH02124199A - Operating device for sewing machine - Google Patents

Abstract

PURPOSE:To gradually increase the speed at the time of starting regardless of the condition of a load by integrally forming a starting stopping operating means and a speed setting means on operation, making the respective ones operatable independently and allowing them to function relating to the starting and the speed adjustment. CONSTITUTION:For the starting of a sewing machine, the starting stopping area of an interlocking operating means 7 is operated, the machine is started at the minimum speed, and while the operation of the interlocking operating means 7 is executed, the operation at the minimum speed is executed. The interlocking operating means 7 is released, rises for a step speed to the speed set to a set speed storing means 13 and the operation is executed at the set speed. Without releasing the operation from the starting and continuously, the operating position is moved to the speed setting area and the speed setting by the operating position is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a sewing machine operating device, and more particularly to a sewing machine operation command means including operating means for starting and speed setting of the sewing machine, and its control means.

(Prior Art and Problems to be Solved by the Invention) A sewing machine is known in which starting, stopping, and speed adjustment of a sewing machine motor as a driving source of the sewing machine are controlled by electronic switching means instead of using a conventional controller. .

In these sewing machines, the above-mentioned start/stop and speed settings are controlled independently, and the start and speed adjustment are linked in order to start at a low speed and then operate at a desired speed. There are different requirements for controlling such controllers.

In other words, the start/stop operation must function immediately at the desired time, independent of the speed setting, and the start/stop operation means and the speed setting means must be located close to each other, independently or related to each other, in order to operate at the desired speed after starting. There is a need for an operating device that can function effectively.

Therefore, in the conventional technology,
A start/stop push button as a means for starting and stopping the sewing machine, such as No. 6, and a speed selection dial as a speed setting means independent from the start/stop operating means are arranged on the sewing machine frame, respectively, to operate the sewing machine. There is something.

With this, when changing the speed after starting with the start/stop operating means, the operator must move his/her hand or finger from the start/stop operating means to the speed setting means, and during that time, take his/her eyes off the fabric being sewn and position the operating position. must be confirmed and carried out.

Furthermore, even in the case where the starting means is integrated with a plurality of speed setting means, such as in Japanese Patent Publication No. 60-14594, the sewing machine must be operated while taking one's eyes off the fabric being sewn in order to adjust the speed during operation and control the stoppage. I had to check the controls.

For this reason, in the present invention, the start/stop operation means and the speed setting means are operationally integrated, each can be operated independently, and the start and stop operation means function in conjunction with each other. The purpose is to provide equipment.

In addition, in the conventional systems such as Japanese Patent Publication No. 17476/1983 and No. 17476/1983, the speed is gradually increased up to the set speed at the time of starting using the above-mentioned start/stop operation means, as shown in Figs. 8 and 9. This is to gradually increase the power supply amount Q with respect to the later time axis T.

The load on the sewing machine is determined by variations in rotational resistance on each side of the sewing machine body.
Or it varies depending on the sewing conditions such as the thickness and hardness of the cloth.

If the power supply amount is simply increased gradually in proportion to time in response to changes in the load on the sewing machine motor, for example, when starting under a large load, if a small amount of power Q is supplied, the sewing machine will not start. There may be cases where the predetermined speed is not reached.

If a large amount of power is supplied after a predetermined period of time has elapsed, the sewing machine starts up rapidly and rotates at high speed.

Therefore, an object of the present invention is to provide a speed control device in which the speed gradually increases after starting regardless of the load condition.

(Means for Solving the Problems) Therefore, in the present invention, a sewing machine motor attached to a sewing machine frame to drive the sewing machine, a start/stop means for outputting a start/stop signal by a pressing operation, and a pressing position corresponding to the sewing machine motor are provided. and a speed setting means for outputting a speed setting signal through a speed setting means, which is integrally formed and mounted on the jaw of the sewing machine, and a speed command program storage means for storing a speed increase command program corresponding to the set speed. and a speed detector that detects the rotational speed of the sewing machine, and an arithmetic unit that calculates the amount of power supplied to a sewing machine motor drive circuit that drives and controls the sewing machine motor based on the detection result of the speed detector, and The operating means is provided with a start/stop area for outputting a start/stop signal in response to a pressing operation and a speed setting area for outputting a speed setting signal in response to a pressed position.

It also includes a set speed storage means for storing the final set speed,
The final speed read from the set speed storage means is controlled as the set speed by releasing the push after starting by pressing the start/stop means. The speed increase program is a program that stores a holding time for holding the step speed together with the step speed, and operates at the step speed for the holding time when the speed detected by the speed detection means reaches the step speed. Configure.

(Example) Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a perspective view of a sewing machine equipped with the operating device of the present invention, in which a sewing machine motor 4 is fixed in a sewing machine frame 1, and a drive shaft 2 rotatably supported on the sewing machine frame 1. It is connected to via belt means 5. Reference numeral 3 denotes a needle bar, which is supported by the sewing machine frame 1 so as to be able to move horizontally and vertically.The needle bar 3 is vertically moved by a drive means connected to the drive shaft 2, and The horizontal movement is transmitted by an amplitude drive means connected to a needle bar amplitude stepping motor 5 fixed to the sewing machine frame l.

A needle 17 is fixed to the tip of the needle bar 3, and forms a lockstitch stitch in cooperation with a hook 18 of a needle thread catching means that is driven in synchronization with the vertical movement of the needle bar. do.

Reference numeral 19 denotes a feed dog, which is fixed to a feed table 20 connected to and driven by the drive shaft 2 and driven in the front-rear direction orthogonal to the left-right movement of the needle bar 3.

Reference numeral 6 denotes a stepping motor for adjusting feed, which is connected to the feed base so as to adjust the forward and backward movement of the feed dog 19.

Reference numeral 7 denotes an interlocking operation means for starting/stopping and speed setting, and is fixed to the jaw of the arm of the sewing machine frame 1. The interlocking operation means is as shown in the first factor, and includes a thin plate-shaped elastic conductor 7a disposed on the upper surface side, a resistor 7b disposed below the elastic conductor with a space in between, and a resistor 7b disposed below the elastic conductor with a space in between. It is comprised of a start/stop switch 7c disposed below with a space in between.

The start/stop switch is held in an ON state and an OFF state by pressing the elastic conductor 7a, and
Output voltage v3 is output during pressing, and output voltage v(3
) is output.

The range on the ground side of the resistor 7b is set as a start/stop region.

Next, the motor control section of the sewing machine of the present invention will be explained with reference to FIG.

In the figure, one end of the resistor 7b in the interlocking operation means 7 is connected to the control power supply Vcc via a fixed resistor rl,
The output voltage v1 is output to the connected first AD converter 8.

The first AD converter converts the output voltage Vl into a controllable digital data signal 31, and the digital data signal is output to the connected disconnection detection means 9. The wire breakage detection means is connected to determine whether or not there is a wire breakage based on the digital data signal, and to output the determination result to the central processing bag rIt10.

The set value detection terminal 7d in the interlocking operation means 7 is connected to the control power supply Vcc via a composite resistance of the fixed resistor rl and the adjusted value of the resistor 7b, and the adjusted output voltage V2 is the second AD converter 1 to be connected
1 is output.

The second AD converter 11 converts the output voltage v2 into a controllable digital data signal S2, and is connected to output the digital data signal to the central processing unit IO.

Reference numeral 12 denotes a speed setting program storage means, which stores a conversion program for converting the digital data signal S2 mentioned above into a set speed.

Reference numeral 13 denotes a set speed storage means, which stores the last set speed set by the previous speed setting program storage means 12, and is used when the OFF signal of the switch 7c of the interlocking operation means 7 is generated. It stores the set speed and is connected to the central processing unit 10.

Reference numeral 14 denotes a theoretical data storage means, which stores conversion data for converting the operating speed set by the speed setting program storage means 12 into digital data of the detection signal from the speed detector 21. , are connected to the central processing unit 10.

Reference numeral 15 denotes a speed command program storage means, which stores a speed increase command program set corresponding to the speed. The speed increase command program stores combinations of step speeds Vsl to Vsn, which are set stepwise up to a set speed VN, and step speed holding times t1 to tn, as shown in FIG. , connected to the central processing unit IO.

Reference numeral 16 denotes a timer value storage means, which stores a timer value corresponding to the step speed holding time from the speed command program storage means 15, and stores the timer value corresponding to the step speed holding time from the speed command program storage means 15.
It is connected to the.

Reference numeral 20 denotes a timer means, which is connected to the central processing unit 10 so as to always output a timer signal when the sewing machine is powered on.

A speed detector 21 is connected to the central processing unit 10.

The sewing machine motor 4 is connected to the central processing unit IO via a sewing machine motor drive circuit 22. The sewing machine motor 4 is connected to a commercial power source Vac.

Next, the operation of the sewing machine operating device of the present invention will be explained with reference to FIG.

When the sewing machine is stopped, the interlocking operation means 7 is operated and the start switch 7c is closed, and the speed setting device 12
When the output voltage v3 is output to the set speed memory bag [13], it is determined in step (a) whether or not the interlocking operation means is being operated.

If the output voltage is V3 and is in operation, then (b)
In step , it is determined whether or not the start/stop region of the interlocking operation means 7 has been operated. This determination depends on whether the output voltage V2 of the set value detection terminal 7d is a value in the startup/stop region.

If the output voltage v2 is in the startup/stop region, then (c)
In step , it is determined whether the vehicle is in operation or not.

When it is determined that the sewing machine motor 4 is stopped based on the output signal from the speed detector 21, in the next step (d), the sewing machine motor 4 is started at the lowest speed prestored in the speed setting program storage means 12. The rotational speed is read out, the amount of power supplied is calculated, and outputted to the sewing machine motor drive circuit to operate the sewing machine motor 4 at the lowest speed.

Next, the process jumps to step (a) described above, and it is determined whether or not the interlocking operation means 7 is being operated. At this time, if the start/stop region remains in operation, the engine is operated at the lowest speed in step (d) above.

When the switch 7C of the interlocking operation means 7 is released in step (a) and the output voltage v(3) is output, it is determined that the switch is released, and the next step is step (e). Determine whether or not.

If it is determined that the sewing machine motor 4 is in operation based on the output signal of the speed detector 21, then in step (f) it is determined whether or not the set speed is stored in the set speed storage means 13. Discern.

The set speed is always updated and stored as the final speed of the previous operation, and if it is stored, the set speed is read out from the set speed storage means 13 and set in step (g). .

If it is not stored, in step (h), the speed is set using the adjustment wJ operation position determined by the output voltage of the resistance detection terminal 7d of the interlocking operation means 7, that is, the magnitude of v2, as a speed setting signal.

Next, in step (i), the first step speed and speed holding time corresponding to the set speed are read from the speed command program storage means 15.

Next, in step D, the amount of power supplied is calculated from the operating speed detected by the speed detector 21 and the step speed, and is output to the sewing machine motor drive circuit 22 to increase the rotation of the sewing machine motor 4. Next, in step (k), it is determined whether the speed detected by the speed detector 21 has reached the step speed described above.

If not, the process jumps to step (D) and outputs a signal to the sewing machine motor drive circuit 22 to further increase the amount of power supplied.

When it is determined that the step speed set in step (k) has been reached, the timer value corresponding to the speed holding time is read out from the timer value storage means 16 in the next step (1), and the speed is maintained. The sewing machine motor 4 is operated at a step speed for a period of time.

In step (m) of the method after the speed holding time described above has elapsed, it is determined whether or not the step speed matches the set speed.

If it is the first step speed and does not match, the above (
+) Jump to the step and read the next step speed. Next, the steps (D, (k) and (1)) described above are executed in sequence.

If the speed matches the set speed in the step (m) described above, the vehicle operates at the set speed in the next step (n).

When the interlocking operation means 7 is operated during driving, the above-mentioned (a)
) to determine whether or not the operating means is being operated. If the operation is in progress, it is determined in the next step (b) whether or not the operated location is in the start/stop area. If the operation is not in the start/stop region but in the speed setting region due to an operation for changing the set speed, the set speed is changed and set based on the value of the output voltage v2 generated according to the operation position in step (h) described above.

If it is determined in step (b) above that the start/stop region has been operated, then in step (C) it is determined whether or not the vehicle is in operation. If the sewing machine motor 4 is in operation, the sewing machine motor 4 is stopped in the next step (p).

Therefore, the sewing machine is started at the lowest speed by operating the start/stop region of the interlocking operation means 7, and while the interlocking operation means 7 is being operated, the sewing machine is operated at the lowest speed. By releasing , the motor is operated at the set speed by increasing step speed to the previously set speed stored in the memory. Also, by moving the operating position to the speed setting area continuously after activation without releasing the operation, the speed is set by the operating position.

(Effects of the Invention) As described above, according to the present invention, starting/stopping and speed setting can be operated continuously or in conjunction with each other by operating the interlocking operation means, and when setting or changing the speed after starting. Since the sewing machine can be operated without having to check the operating position each time as in the past, the sewing machine can be operated without taking the eye off the fabric being sewn. In addition, regarding the increase to the set speed, after reaching a plurality of predetermined step speeds corresponding to the set speed, the vehicle is operated at the step speed for a predetermined holding time to execute the optimal speed increase for the set speed. Can be done.

[Brief explanation of the drawing]

The drawings relate to embodiments of the present invention, and FIG. 1 is a control block diagram of the operating device of the present invention, FIG. 2 is a flowchart for explaining control, and FIG.
The figure is a perspective view of the sewing machine, Figure 4 is an explanatory diagram of the configuration of the interlocking operation means, Figure 5 is an explanatory diagram of the start/stop area and speed setting area of the interlocking operation means, and Figure 6 is an illustration of the start/stop area and speed setting area. An explanatory diagram of another embodiment, FIG. 7 is an explanatory diagram of a speed increase program, FIG. 8 is an explanatory diagram of a conventional speed increase curve after startup, and vg9 diagram is an explanation of another conventional speed increase curve after startup. In the figure, 1 is a sewing machine frame, 4 is a sewing machine motor, 7 is an interlocking operation means, 15 is a speed command program storage means, 21 is a speed detector, and 22 is a sewing machine motor drive circuit. ■ →T

Claims (7)

[Claims] (1) The sewing machine motor attached to the sewing machine frame to drive the sewing machine, the start/stop means that outputs a start/stop signal in response to a pressing operation, and the speed setting means that outputs a speed setting signal in accordance with the pressed position are integrated. an interlocking operation means which is formed into a shape and attached to the jaw of the sewing machine, and a calculation device which calculates the amount of power supplied to a sewing machine motor drive circuit that drives and controls the sewing machine motor based on a speed setting signal of the interlocking operation means. A sewing machine operating device equipped with (2) Claim (1) characterized in that the interlocking operation means is provided with a start/stop region for outputting a start/stop signal in response to a pressing operation and a speed setting region for outputting a speed setting signal in response to a pressed position. The operating device for the sewing machine described in . (3) The interlocking operation means sets the starting/stopping area to overlap with the lowest speed area of the speed setting area, and controls operation at the lowest speed of the speed setting area while pressing the starting/stopping area. The operating device for a sewing machine according to claim 2, characterized in that: (4) The sewing machine motor attached to the sewing machine frame to drive the sewing machine, the start/stop means that outputs a start/stop signal in response to a pressing operation, and the speed setting means that outputs a speed setting signal in response to the pressed position are integrated. a speed detector for detecting the rotational speed of the sewing machine; and a sewing machine motor drive circuit for driving and controlling the sewing machine motor based on the detection results of the speed detector. and a set speed storage means for storing the final set speed of the interlocking operation means, the set speed storage means being read out from the set speed storage means by releasing the pressure after activation by pressing the start/stop means. A sewing machine operating device characterized in that the final speed of the sewing machine is controlled as a set speed. (5) A sewing machine motor attached to the sewing machine frame to drive the sewing machine, a start/stop means that outputs a start/stop signal in response to a pressing operation, and a speed setting means that outputs a speed setting signal in accordance with the pressed position are integrated. a speed command program storage means for storing a speed increase command program corresponding to a set speed; and a speed detector for detecting the rotational speed of the sewing machine;
A sewing machine operating device comprising: a calculation device that calculates an amount of power supplied to a sewing machine motor drive circuit that drives and controls a sewing machine motor based on a detection result of the speed detector. (6) The speed increase program stores a plurality of predetermined step speeds corresponding to the set speed,
6. The sewing machine operating device according to claim 5, wherein the calculation device calculates the amount of power supplied from the read step speed and the detected speed detected by the speed detection means. (7) The speed increase program stores a holding time for holding the step speed together with the step speed,
7. The sewing machine operating device according to claim 6, wherein the sewing machine is controlled at the step speed for a holding time when the speed detected by the speed detection means reaches the step speed.