JPH0632073Y2 - Sewing machine operating device - Google Patents

Description

[Detailed description of the device] (Purpose) In the case where the operation is performed by the start and stop switches provided on the sewing machine main body without using the foot controller, a desired sewing direction conversion point or To obtain a sewing machine that is easy to take to the sewing end position.

(Prior Art) In the case of a conventional sewing machine, a start / stop switch, which is usually composed of a step-type switch, etc., is provided in the vicinity of the hand holding and guiding the cloth to be sewn, and the rotation speed setting operation switch of the sewing machine is , It is provided away from this.

When the sewing machine in operation is stopped, it is customary to perform the stop operation immediately without operating the rotation speed setting operation switch of the sewing machine and without reducing the rotation speed of the sewing machine.

In this case, especially when the sewing machine speed is higher than medium speed, several stitches to several tens of stitches are sewn by the inertia rotation between the time when the stop operation is performed and the time when the sewing machine actually stops. It was difficult to stop.

On the other hand, in the past, the start and stop switches were made into a lever shape, and the stroke of the switch was enlarged to operate the declutch mechanism of the sewing machine through the mechanism, and the sewing machine was forcibly stopped at the same time as the stop operation. was there.

However, in this case, there are drawbacks that a force is required for the start and stop operations and that the sound generated when the declutch mechanism operates is large.

In addition, there are other electronic methods by the applicant, but the "arrangement" for the operation in which various functions are different depending on how long the operation switch is pressed is complicated.

(Solution Means) The first operation means and the second operation means are provided close to a sewing machine face plate and at a position easily operated by a fingertip of a hand that holds and guides the cloth to be sewn during sewing. The first operating means is provided with a function of starting and stopping the sewing machine, the second operating means does not function in the stopped state, and the sewing machine rotation speed is low when operating the sewing machine. In addition to having the function to shift to
The second operation means has a shape, arrangement, and structure that encloses the first operation means so that the second operation means can be discriminated without looking at the second operation means, and the effect of preventing erroneous operation of the first and second operation members is improved. It is a thing.

As a result, the sewing machine operator can accurately change the sewing direction and bring the end position to a desired position without diverting the line of sight from the work of the needle tip.

Further, deceleration near the stop position becomes easy, the maximum speed of the sewing machine can be set at a high position (high speed), and the sewing efficiency becomes good.

Further, a work for moving the maximum speed setting of the sewing machine to a lower speed may be performed just before the stop position, and the troublesome work of resetting the maximum speed every time sewing is also improved.

Further, by using the step-type switch for the first operating means and the automatic resetting type switch for the second operating means, the workability is extremely easy and simple.

(Embodiment) In FIG. 1A, 1 is a first operation means, and 2 is a second operation means, which can be easily operated by a hand operation during a sewing operation.

In the case of this example, 1 is a start configured by a step type or the like,
It is an operation switch for stop.

Reference numeral 2 denotes an operation switch for automatically returning the sewing machine to a low speed when the sewing machine is operated before the operation of the sewing machine is stopped by operating the switch 1.

Reference numeral 3 denotes a third operation switch, which is directly connected to the speed setting volume and is capable of arbitrarily setting the maximum speed of the sewing machine.

When the sewing machine is stopped, the sewing machine is started by operating the start / stop switch 1 and the speed is increased to the maximum speed of the sewing machine set by the switch 3.

Reference numeral 4 denotes a sewing machine main body. When the upper shaft directly connected to the sewing machine pulley 5 rotates, the sewing mechanism of the sewing machine operates.

The sewing machine pulley 5 is driven by a sewing machine motor, and the drive circuit of the sewing machine motor, a computer circuit, and the like are built in the sewing machine main body.

The arrangement and configuration of the first operating means and the second operating means are shown in FIG. 1B.

The shape of the second operation means is an inverted L-shape in (a), an L-shape in (b), a c-shape in (c), a shape in (d), and an e-shape in (e).

The second operation means is for (a) About (C) As described above, the first operating means are arranged so as to be wrapped in the pocket on the plane.

By doing so, it becomes possible for the sewing machine operator to recognize the distinction by the feel of the hand during the sewing work without shifting the line of sight to the switch which is the first and second operation means.

In FIG. 2, P1 and P2 are phototransistors, which are light receiving elements for brake phase detection and speed detection, respectively.

S1 is for blocking the light beam from the light emitting diode D1 in the brake phase.

S2 is a slit disk for speed detection, and is used for the intermittent optical pulse proportional to the rotation to reach P2.

S1 and S2 rotate integrally with the upper shaft of the sewing machine.

M is a sewing machine motor, which includes a speed target value, a signal from the speed detector, and a means for comparing the signals, and speed negative feedback control is performed by the drive circuit.

During braking, a constant phase stop of the upper shaft of the sewing machine is performed by a brake command from a computer circuit based on the brake phase signal.

The computer circuit includes a central processing unit CPU and a memory RO.
M, memory RAM and input / output interface I / O
Etc.

The above-mentioned third operating means is directly connected to a volume as a speed setting device, and the setting of the speed level by the volume is A / D converted and taken into the computer circuit through the input / output interface I / O.

The memory ROM stores speed data, a main program, a speed gradually increasing program, an operating program, other programs, sewing pattern data and the like.

The memory RAM is used to temporarily store various flags, operation data, operation results, various conversion data, and sewing data when various programs are executed.

The operation of the present invention constructed as described above will be described with reference to the flow chart shown in FIG. 3 and the velocity curve diagram shown in FIG.

LOOP1 → KEYIN → X while the sewing machine is stopped
A loop of 1 → X2 → LOOP1 waits for an operation input to the first operating means (start / stop switch) and the second operating means (speed / low speed shift switch).

At this time, no action is taken even if the second (speed / low speed shift switch) operating means is operated.

When the first operating means (start / stop switch) is pressed, the process branches to X3, and the sewing machine shifts to the activated state.

Next, the program proceeds to the speed gradual increase program of LOOP2, and if it is set to the speed preset by the third operating means (maximum speed setting switch), for example, the speed 3 of X6, the loop of the program is LOO
P2 → X4 → X5 → X6 → X8 → KEYIN → X9 → X
10 → LOOP2 is formed.

In this embodiment, the speed of the sewing machine gradually increases in the process of circulating the loop of the program.

This mode is shown in FIG. 4, and in the case of the above example, the curve of speed 3 is followed.

After reaching the set maximum speed, the program circulates and executes in the above loop, and has the next operation input in this process.

When the sewing machine is stopped, if the stop operation is performed by pressing the first operating means (start / stop switch) without operating the second operating means (speed / low speed shift switch), X9 (Y) YES To branch to X11.

In this case, the machine waits at X11 until the speed becomes low, during which the sewing machine continues to operate.

The low speed referred to here means the speed level shown by the dotted line in FIG.

Even if a brake signal is issued at a speed level higher than the low speed level, the sewing machine will stop after passing through a predetermined stop phase.

When the speed becomes low at X11, the program shifts to X12, and the program circulates between X11 and X12 until the brake phase comes.

X13 with a limited brake phase near the needle bar top dead center
Then, the power generation of the sewing machine motor is limited by the brake command generated only once, and the sewing machine stops at the predetermined upper shaft phase.

Then, the process returns to the initial LOOP1 → X1 → X2 → LOOP1 stop routine.

Therefore, when the first operation means (start / stop switch) is pressed at X9 and the stop operation is performed, several stitches are sewn until the sewing machine stops, and the sewing desired by the operator is performed. It becomes difficult to immediately stop at the end position.

In the case of the above-described embodiment, the sewing machine having the braking function is provided, and the sewing machine having no braking function is further overrun.

Therefore, when stopping the sewing machine which is in operation, from X8 to X1
At 0, the case where the low speed shift operation is performed by the second operation means (speed / low speed shift switch) before the stop operation by the first operation means (start / stop switch) described above will be described.

When the second operating means is pressed at an appropriate time near the end of sewing, this is recognized at X10 and LOOP3 is reached.

Here, the sewing machine becomes slow and X14 → X15 → LOOP
The loop of the program of 3 → X14 is circulated.

In this state, when the first operating means (start / stop switch) is pressed to stop at the end of sewing, the rotation speed of the sewing machine has already become low and the brake signal indicates that the first brake phase has been reached. By the way,
The sewing machine immediately stops at a predetermined upper axis phase, and the stop position can be set as the end point of the sewing desired by the operator.

That is, the second operating means should be operated without neglecting the work of the needle tip when the end point of the sewing is about to be reached, and the first operating means should be pressed at the end point of the next sewing. Of.

As described above, according to the present invention, the sewing machine operator pays sufficient attention to the work of the needle tip without changing his or her line of sight to various operation switches at the time when the sewing direction is frequently changed or the sewing end point is sewn during the sewing work. By pouring, you can shift to low-speed operation easily without worrying about erroneous operation, so you can work safely.

In addition, the subsequent stopping operation can be performed, which is particularly effective in significantly improving the accuracy of the sewing finish in a controllerless household desk-top sewing machine.

[Brief description of drawings]

FIG. 1A is an external view of a sewing machine showing an embodiment of the present invention. 1 is the first operation means (start, stop switch),
Reference numeral 2 is a second operating means (speed / low speed shift switch), and 3 is a second operating means (maximum speed setting switch). FIG. 1B shows the shapes and forms of the first operating means and the second operating member in the present invention. FIG. 2 is a block diagram of a driving operation circuit showing an embodiment of the present invention, FIG. 3 is a driving operation control flowchart, FIG. 4 is a driving speed characteristic explanatory diagram, and FIG. 5 is a functional block diagram.

Claims (2)

[Scope of utility model registration request] 1. A first operating means and a second operating means are located near a sewing machine face plate and at a position easily operated by a fingertip of a hand which holds and guides the cloth to be sewn during sewing. Provided,
The first operating means is provided with a function for starting and stopping the sewing machine, the second operating means is provided with a function for shifting to a low speed operation during an operation during sewing machine operation, and the second operating means is A third operating means having a shape, arrangement, and structure that encloses the first operating means, is connected to a speed setting volume at another location, and has a function of setting the maximum speed of the sewing machine. A sewing machine operating device characterized by the above. 2. A sewing machine according to claim 1, wherein the first operating means is a step-type switch and the second operating means is an automatic reset type switch. Operating device.