JPS6234592A - Yarn hanging order indicator of sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a device for indicating the order of thread hooks in a sewing machine by using a plurality of light emitting elements fixedly installed in the vicinity of a member. .

[prior art] This kind of thread hook was used as an order indicating device in 1986-20.
A device described in Japanese Patent No. 386 has been proposed. The device is constructed such that threading is performed only during the sequence of command operations after the power switch is turned on and before the sewing machine is first started. However, if the sewing thread breaks while the sewing machine is running, the sewing thread must be rethreaded, but in this case, the threading sequence instruction device has stopped operating.
To operate the device again, press the power switch -H.
I had to turn it off and turn it back on.

[Problems to be Solved by the Invention] However, it is inconvenient to use the sewing machine to thread the sewing machine by turning off the power switch -H and then turning it on again in order to operate the order indicating device. Furthermore, since computerized sewing machines are configured so that a specific stitch pattern is selected when the power switch is turned on, the desired stitch pattern that was selected before the power switch is turned off is Since the switch automatically returns to the specific pattern when the device is turned on again, it is necessary to select the desired pattern again.

[Object of the Invention] Therefore, the present invention has been made to solve the conventional problems, and its purpose is to turn off the power switch -H in order to operate the order indicating device. The purpose of the thread hook is to provide a sequence indicating device which always performs the sequence indicating operation while sewing is stopped when the power is supplied without being turned on again.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a plurality of light emitting elements fixedly installed near each of the plurality of members along the yarn supply path, and a plurality of the light emitting elements. a blinking sequence control means for sequentially blinking the light-emitting elements according to a predetermined sequence of threading; a detection means for detecting that the presser foot is raised when the sewing machine is stopped; and a detection means for starting the sewing machine after the presser foot is raised. and operating means for operating the blinking sequence control means until the flashing sequence control means is activated.

[Operation] The detection means detects that the fifth presser foot is raised when the sewing machine is stopped, and supplies a detection signal to the actuation means. The activation means activates the flashing sequence control means according to the detection signal. The plurality of light emitting elements are blinked by actuation of the blinking sequence control means. Then, when the sewing machine is started for the first time after the presser foot is raised, the actuation means stops the operation of the blinking sequence control means, and accordingly, the blinking of the plurality of light emitting elements is stopped. As a result, the threading order is always instructed while the presser foot is raised, that is, while sewing is stopped.

[Example] An example of the present invention will be described below with reference to the drawings.

First, the overall configuration of the sewing machine will be described with reference to FIG.
The upper arm 16 extends horizontally from the upper arm 16. On the front surface of the upper arm 16, there is a pattern display board 20 on which are printed figures (not shown) for each of a large number of stitch patterns and pattern numbers (not shown) from "00" to "199" corresponding to each pattern. It is permanently installed. Pillar portion 14
is provided with four numeric input keys 22a to 22d for individually specifying each pattern, keys 22a and 22b function to set the lower digit number of the pattern number, and keys 22c and 22d function to set the lower digit number of the pattern number. It acts to set the upper digit number. The two-digit number set using the number input keys 228 to 22d is displayed on the number display 24. A start/stop switch 26 that can be operated to start or stop the sewing machine is provided on the front surface of the head 18 of the upper arm 16, and a thread tension regulator (not shown) is provided on the upper arm 16 and its head 18. It is equipped with a thread take-up spring, a thread take-up, etc. A presser bar 38 is provided on the head 18 so as to be movable up and down, and a cloth presser foot 36 is attached to the lower part of the presser bar 38. Further, a needle bar 32 is disposed at the head 18 and is capable of reciprocating up and down and swinging in the lateral direction. On the front surface of the head 18, five light emitting diodes 34a to 34e are respectively provided close to the thread tension device, thread take-up spring, thread take-up lever, and thread hook member 30.

Next, with reference to FIG. 1, the electrical configuration of the threading order instruction device of the sewing machine will be described below.

The start/stop switch 26 is an automatic return type switch, which generates a high-level operation signal SP during a pressing operation, generates a low-level operation signal SP when the pressing operation is released, and generates a low-level operation signal SP when the pressing operation is released. Operation stop command generation circuit 40
and the actuating device 50. The operation stop command generation circuit 40 alternately generates a high-level operation command signal and a low-level stop command signal every time the high-level operation signal @SP of the start/stop switch 26 is input, and sends the signals to the inverter. The signal is supplied to an AND circuit 46 via a line 44, and is also supplied to a motor control device (not shown). The presser foot rise detector 42 has a limit switch disposed in the upper arm 16 of the sewing machine, and is attached to the presser foot bar 38 when the presser foot 36 is raised to a predetermined upper position. The member that does not actuate the limit switch is configured to actuate the limit switch.

Then, the presser foot rise detector 42 changes the detection signal KS to a high level when the presser foot 36 (if the presser foot 36 is rising), and changes the detection signal KS to a high level when the presser foot 36 is lowered.
is changed to a low level and supplied to the AND circuit 46. One shot multivibrator 4
8, when the signal from the AND circuit 46 rises to a high level, a start pulse ST of a predetermined width is generated in response to the rise.
is configured to supply the actuating device 50 with: When supplied with the start pulse ST, the actuating device 50 supplies the blinking sequence control device 52 with an operation signal @PR for operating the blinking sequence control device 52, which will be described later.

Then, when a high-level operation signal SP is supplied from the start/stop switch 26, the actuator 50 stops outputting the actuation signal PR.

The blinking sequence control device 52 is configured to supply a control signal to the light emitting diode group 34 for blinking the light emitting diode group 34 when the activation signal PR is supplied. The light emitting diode group 34 includes five light emitting diodes 3 provided on the front surface of the head 18 of the upper arm 16 to indicate the positions of a plurality of members to which sewing threads are applied.
4a to 34e, which blink cumulatively in accordance with a control signal from a blinking sequence control device 52.

The operation of this embodiment having the configuration described above will be explained.

A worker performs various preparatory tasks before sewing with a sewing machine, and one of these tasks is to feed out sewing thread from a thread spool (not shown) and apply it to the thread tension device, thread take-up spring, thread take-up lever, etc. in a predetermined order. The hanging work must be done at Therefore, when the operator first lifts the presser foot 36 to release the thread tension disc of the thread tension device, the presser foot constant rise detector 42 detects that the presser foot 36 has been raised. Then, the detection signal KS is changed to a high level and is supplied to the AND circuit 46. On the other hand, since the sewing machine is in a stopped state at this time, the AND circuit 46 is opened by receiving a low level signal from the operation stop command generation circuit 40 via the inverter 44, and the high level detection signal K
Pass S, one-shot multivibrator 48
supply a high level signal to the When the multi-by-break 48 receives a high level signal from the AND circuit 46, it supplies a start pulse ST to the actuating device 50.

The actuator 50 supplies an actuation signal PR to the flashing sequence control device 52 upon receiving the start pulse ST. When the blinking sequence control device 52 is supplied with the operation signal @PR, it is determined in steps S1 to S5 shown in FIG. 3 whether or not the light emitting diodes 34a to 34e are blinking. to 34e
is not blinking, so the light emitting diode 34a is blinked in step S6. Then, in steps S1 to S5, it is determined whether or not the light emitting diodes 34a to 34e are blinking, and in step S5, it is determined whether the light emitting diode 34a is blinking.
．． In S7, the light emitting diodes 34a and 34b are blinked. Then, in steps S1 to S4, it is determined whether or not the light emitting diodes 34b to 34e are blinking, and in step S4, it is determined whether the light emitting diode 34b is blinking, so in steps S6 to S8, the light emitting diodes 34a to 34C are blinked. .

Then, in steps S1 to S3, it is determined whether or not the light emitting diodes 34G to 34e are blinking, and in step S3, it is determined whether the light emitting diode 34G is blinking, so in steps S6 to S9, the light emitting diodes 34a to 34d are blinked. . And step 3
1. In S2, it is determined whether or not the light emitting diodes 34d and 34e are blinking, and in step S2, it is determined whether the light emitting diode 34d is blinking, so step S6
In steps 810 to 810, the light emitting diodes 34a to 34e are blinked. Then, in step S1, it is determined whether or not the light emitting diode 34e is blinking, and since the light emitting diode 34e is blinking, all of the light emitting diodes 34a to 34e are turned off in step S11.

Then, the blinking sequence control device 52 controls the activation signal PR.
is supplied to the light emitting diodes 34a to 34e.
The cumulative blinking operation and all subsequent extinguishing operations are repeated. The worker looks at the blinking light emitting diode 34.
According to the order of a to 34e, the thread tension device, thread take-up spring, thread take-up, and thread hook can accurately hang the sewing thread in the order of the members 30. Thereafter, in order to sew a desired pattern, the operator lowers the presser foot 36 and presses the start/stop switch 26. During this operation, a high level operation signal SP is sent to the operation stop command generation circuit 40. The actuating device 50 is supplied with the actuating device 50. The operation stop command generation circuit 40 outputs a high-level operation command signal in response to the high-level operation signal SP. Then, a motor control device (not shown) starts operation of the sewing machine. The actuating device 50 stops supplying the actuating signal PR to the flashing sequence control device 52 upon receiving the high-level operating signal QSP. The blinking sequence control device 52 stops the operation shown in the flowchart of FIG. 3 mentioned above because the supply of the actuation signal PR is stopped. Therefore, all the light emitting diodes 34a to 34e are turned off.

If the sewing thread breaks while sewing a desired pattern, when the operator presses the start/stop switch 26 to rethread the sewing thread, a high-level operation signal SP is sent to the operation stop command generation circuit 40 during this operation. and the actuating device 50. In this case, since the actuator 50 has stopped outputting the actuation signal PR, the operation of the actuator 50 does not change even if it receives the high-level operation signal SP in this state. The operation stop command generation circuit 40 outputs a low-level stop command signal in response to the high-level operation signal SP. Then, the motor control device (not shown) stops the operation of the sewing machine. After the sewing machine has stopped, when the operator lifts the presser foot 36 to release the thread tension plate of the thread tension device, the presser foot rise detector 42 detects that the presser foot 36 has been raised. Then, the detection signal KS is changed to a high level and is supplied to the AND circuit 46. On the other hand, since the sewing machine is in a stopped state at this time, the AND circuit 46 is opened, passes the high-level detection signal KS, and supplies a signal rising to the high level to the one-shot multivibrator 48. The multivibrator 48 supplies a start pulse ST to the actuator 50 in response to a rise to a high level from the AND circuit 46. The actuating device 50 receives a start pulse ST.
When receiving the activation signal PR, the sequence control device 52 flashes the activation signal PR.
supply to. The blinking sequence control device 52 repeats the operation of the flowchart of FIG. 3 described above by supplying the operation signal PR, and while the operation signal PR is supplied,
The cumulative blinking operation of the light emitting diodes 34a to 34e and the turning off operation of all the lights are repeated. The operator can again thread the thread in the order of the thread tension device, thread take-up spring, thread take-up, and thread hook member 30 in accordance with the order of the flashing light emitting diodes 34a to 34e. When starting sewing after the sewing thread has been adjusted, the desired pattern that was selected immediately after the thread broke is selected without being changed, so the operator does not need to perform any special pattern selection operation. 6114 of the desired pattern can be performed subsequently.

In this embodiment, when the sewing thread breaks during sewing, the movement of the sewing machine is stopped and the presser foot 36 is raised, so that the light emitting diodes 34a to 34 are
The blinking operation of e can be started, and even at that time, the desired pattern is not changed in any way.

[Effects of the Invention] As is clear from the above detailed description, the present invention allows threading to operate the order indicating device without turning off the power switch and then turning it on again as in the conventional device. By raising the presser foot while sewing is stopped when power is supplied, the threading can perform a sequence instruction operation. In addition, when re-hanging the thread when the thread breaks, the power switch is not operated, so the desired pattern selected at the time of the thread break is not automatically changed to a straight line pattern. The selection of the pattern is reliably maintained even after the threading is straightened, and as a result, it is possible to ensure the beautiful formation of the desired pattern.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a block diagram showing the electrical configuration of a sewing machine to which an embodiment of the threading and order indicating device of the present invention is applied, and FIG. FIG. 3 is a flowchart showing the operation of the blinking sequence control device of this embodiment. 30: thread hook member, 32: sewing needle, 34a to 34C: light emitting diode, 36: presser foot, 42: presser foot rise detector, 50: actuating device, 52: blinking sequence control device

Claims (1)

[Scope of Claims] 1. A sewing machine in which a plurality of members on which sewing thread is applied by an operator are arranged at intervals in a thread supply path from an upper thread supply source to a sewing needle, the sewing machine having the following features: a plurality of light emitting elements fixedly installed near each of the plurality of members; and a blinking sequence control means capable of performing an operation of sequentially blinking the plurality of light emitting elements according to a predetermined order of threading the plurality of members. , a detection means for detecting that the presser foot is raised when the sewing machine is stopped, and the blinking sequence control means for controlling the blinking sequence from the time when the detection signal from the detection means is generated until the sewing machine is started for the first time thereafter. and actuating means for actuating the sewing machine.