JPH0663269A - Safety device for sewing machine - Google Patents

Abstract

PURPOSE:To use a computer-controlled sewing machine extremely safely at the time of its start. CONSTITUTION:In a computer-controlled sewing machine, a start signal- generating device A such as a controller 1 or a start and stop switch 2, an electric source switch B for supplying electric power required for the sewing machine, a safety-determining device C for determining whether it is normal or not, a forcibly stopping device D for insuring safety by stopping the whole operation at the time of abnormal operation and a safety-indicating device E for indicating such information that the electric source switch is again turned on, to an operator, are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer safety device for a sewing machine which can be used very safely at the time of starting.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 59-44
No. 076 exists. In this device, first, when the start signal is output from the controller for some reason, when the power is turned on, the drive-inhibited state of the drive system is only retained. Further, secondly, the only condition for releasing the drive prohibited state is to stop the start signal once.

[0003]

In the above-mentioned first,
The operator cannot notify that a dangerous operation has been performed. The operator cannot grasp the degree of danger of the operation. It is difficult to deal with when the operator is not directly involved. There are drawbacks such as.

Further, in the second case, there is a possibility that an erroneous signal is intermittently output and sudden activation occurs due to poor contact or the like. It is very likely to cancel the drive prohibition state without knowing it. There are inconveniences such as.

[0005]

In order to solve the above-mentioned problems, the inventor has, as a result, earnestly conducted research, and as a result, invented the invention in a sewing machine for controlling by a computer, such as a controller or a start / stop switch. A start signal generator, a power switch that supplies the electric power required for the sewing machine, a safety judgment device that determines whether the machine is normal or abnormal, a forced stop device that stops all operations in the event of an abnormality to ensure safety, and an operator. By using a safety display device that displays information such as power-on again, it can be used extremely safely at the time of start-up, and it solves the above-mentioned problems and achieves its purpose.

[0006]

Embodiments of the present invention will be described below with reference to FIGS. The present invention mainly includes a start signal generator A such as the controller 1 or the start / stop switch 2 and a power switch B for supplying electric power required for the sewing machine.
And a safety judgment device C for judging normality or abnormality, a forced stop device D for stopping all operations in case of abnormality and ensuring safety, and a safety display device E for displaying information such as power re-turning to the operator. It consists of and.

A central processing unit (CPU) 15 is built in a control box of the sewing machine, and the control box is provided with a pattern selection means 3 having a pattern selection key 3a.

As the start signal generator A, specifically, the controller 1 or the start / stop switch 2 is used.

Further, the safety judgment device C is provided with a program storage means 4 for safety judgment and a start sequence program storage means 5 provided with a program capable of judging safety or abnormality.
It consists of and. Specifically, the controller 1
When both the power switch B and the ON signal are output, it is determined that the program storage means 4 of the safety determination device C is abnormal through the AND gate 12.
The forced stop device D operates.

When the power switch B is ON and the controller 1 is OFF, it is judged as safe by controlling the program storage means 4 of the safety judgment device C via the AND gate 12, and the controller 1 The motor drive circuit 8 is configured to operate according to the magnitude of the level signal from the.

The starting sequence program storage means 5 reads the signal from the controller 1 before the signal from the power switch B, and stores the starting sequence in advance according to a designated flowchart in order to make a reliable judgment. It is something to put.

The forced stop device D has a built-in forced stop system program storage means 6 for forcibly stopping and displaying a warning when a predetermined signal is generated in advance. It is read from the forced stop system program storage means 6 and output to the safety display device E, and the warning display means 7 such as liquid crystal displays "Please turn off the controller 1 and turn on the power again."

The motor drive circuit 8 is connected to the central processing unit (CPU) 15 so that the drive motor 9 can be driven.

A stepping motor drive circuit 10 is connected to a central processing unit (CPU) 15, and an output signal of the stepping motor drive circuit 10 causes an X motor 11a for X direction drive and a Y direction drive. Y motor 1
1b and embroidery can be driven. Reference numeral 14 is a speed adjustment key.

Next, the operation will be described. For some reason, the controller 1 of the start signal generator A is caused.
When the ON signal is output to the power switch B (see S1) while the switch is ON, the level of the controller 1 is monitored (see S2), and the program storage means 4 of the safety determination device C is controlled. Was judged to be abnormal,
If it is in the ON state in S3 (outputting an ON signal to the power switch B), the forced stop device D is activated (see S4) and output to the safety display device E. Please turn off and turn on the power again. "Is displayed (see S5).

When such a message is displayed, the sewing machine operator turns off the controller 1 of the start signal generator A, and then turns on the power switch B again (see S1). Then, the level of the controller 1 is monitored (see S2), and it is determined to be normal by the control of the program storage means 4 of the safety determination device C.
When it is in the OFF state in S3 (ON signal to the power switch B), the motor drive circuit 8 is turned ON by the level signal (see S6), and the motor drive circuit 8 is controlled according to the level of the controller 1. (See S7) While sewing the desired sewing machine and stopping the controller 1 appropriately (S7).
8), and ends.

[0017]

According to the present invention, the start signal generator A such as the controller 1 or the start / stop switch 2 is used in the sewing machine controlled by the computer.
And a power switch B for supplying the electric power required for the sewing machine,
A safety judgment device C for judging normality or abnormality, a forced stop device D for stopping all operations at the time of abnormality to ensure safety, and a safety display device E for displaying information such as power re-turning to the operator. By making it a safety device of the sewing machine equipped,
It is possible to confirm the dangerous state and to operate the sewing machine safely.

As described above, according to the present invention, the state of the controller 1 or the like can be immediately known by the information transmission device when the power switch B is turned on. That is, even if an abnormality occurs, the operator's hand can easily shut off the power if it is in the vicinity of the power switch B because it is immediately after the power is turned on.

Specifically, the presence or absence of a start signal from the controller 1 is determined when the power is turned on by the computer. If there is a start signal at this time,
On the safety display device E, information indicating that a dangerous operation has been performed and information leading to a solution can be transmitted and provided to the operator.

That is, the easy operation deepens the recognition of safety, and the normal operating method of the sewing machine can be learned. Further, since the forced stop is performed, it is possible to avoid a danger due to an erroneous operation and an erroneous operation, and further safety is secured.

In particular, in contrast to the prior art, the present invention can inform the operator of danger and ensure safety, and
If the power is turned on again, due to poor contact, etc.
There is an advantage that it is possible to avoid the possibility of an erroneous signal being intermittently output and sudden activation.

In order to prevent the subsequent operation and malfunction of the drive system, the computer ends the program or enters an infinite loop in which it cannot escape. For example,
If the message "Please turn off the controller 1 and turn the power on again" is displayed, a safe normal operation can be performed by performing a process according to the provided information.

[Brief description of drawings]

FIG. 1 is an operation block diagram of the present invention.

FIG. 2 is a block diagram of the present invention.

FIG. 3 is a flowchart of the present invention.

FIG. 4 is a perspective view of a sewing machine with an embroidery function and a controller.

[Explanation of symbols]

 A ... Start signal generator B ... Power switch C ... Safety judgment device D ... Forced stop device E ... Safety display device 1 ... Controller 2 ... Start / stop switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akiyoshi Sasano 3-1-1 Kyobashi, Chuo-ku, Tokyo Jamme Sewing Machine Co., Ltd.

Claims (1)

[Claims] 1. In a sewing machine controlled by a computer, a start signal generating device such as a controller or a start / stop switch, a power switch for supplying electric power required for the sewing machine, and a safety judging device for judging normality or abnormality. A safety device for a sewing machine, which is equipped with a forced stop device for stopping all operations to ensure safety in the event of an abnormality and a safety display device for displaying information such as power-on to the operator.