JP2806049B2 - Fastener sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine for sewing a fastener in a pocket of clothing or the like.

[0002]

2. Description of the Related Art Hitherto, a fastener sewing machine of this type has been known as disclosed in Japanese Utility Model Publication No. 62-614. That is, this fastener sewing machine
Stitch forming means for forming stitches on a cloth placed on the upper surface of a sewing machine table, a binder which is provided with a guide for supplying a fastener on the cloth and which can be raised and lowered; And a fastener feeding means for feeding the fastener from a fastener supply source above the table to the binder side by a roller.

In this type of sewing machine with a fastener, a switch for selecting whether or not the fastener is to be sewn is provided.
Alternatively, the presence / absence can be programmed in advance, and furthermore, cycle sewing including a plurality of sewing lengths is also possible.

[0004]

However, in a case where sewing with and without a fastener is alternately sewn, for example,
If the operator presses SW while forgetting the fastener set despite programming the simultaneous fastener sewing due to an operator's operation error, the sewing will be completed without the fastener being sewn, or even if no fastener is programmed Regardless, if the user forgets to remove the fastener from the guide portion and presses the start SW, the fastener is sewn, resulting in a defective product.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a fastener sewing machine capable of preventing a fastener sewing error.

[0006]

In order to achieve this object, the present invention provides a stitch forming means for forming a stitch on a cloth placed on the upper surface of a sewing machine table, and passing the cloth through a stitch forming point. In a fastener sewing machine including a feeding means for feeding to the opposite side, and a guide means for supplying and guiding a fastener to a stitch forming point on the upper surface of the cloth, a sewing specification storage means for storing presence or absence of fastener sewing, Detecting means for detecting whether or not a fastener is present at the stitch forming point of the cloth at the start of sewing; and information on the presence or absence of the fastener from the detecting means and the sewing specification information from the sewing specification storage means. There is provided a determining means for determining a setting error, and a stopping means for stopping the activation of the feeding means when the setting error of the fastener is determined by the determining means.

[0007]

In the present invention having the above construction, the sewing specification storing means stores the presence or absence of the sewn fastener, and the detecting means detects whether or not the fastener exists at the seam forming point of the cloth at the start of sewing. The determination means determines a fastener setting error based on the fastener presence / absence information from the detection means and the sewing specification information from the sewing specification means, and the stop means determines the fastener setting error by the determination means. Sometimes, the activation of the feeding means is stopped.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a ball stitch sewing machine will be described below with reference to the drawings.

In FIG. 1, a needle bar 1 moves up and down in conjunction with a main shaft (not shown), and a needle 2 is fixed to a lower end thereof.

The large presser plate 4 is made of a cloth W on the upper surface of the sewing machine table 3.
Press. The large presser plate 4 has a large presser plate drive motor M
1 is operatively connected to the moving body 18 (see FIG. 4), and the large presser plate 4 presses the cloth W at the sewing preparation position on the right side in FIG. The sewing machine is moved to the sewing completion position on the left side of the needle drop point in FIG.

Fastener guides 19a and 19b for supplying the fastener F onto the cloth W arranged opposite to the needle 2 are fixed to the binder 5, and a sewing preparation position (two-dot chain line in FIG. 1) and sewing are performed. It is moved between the start position (solid line in FIG. 1). The guide 19a is for holding the fastener F by a spring, and the guide 19b is for guiding the fastener through.

The fastener supply source 6 is arranged at a predetermined position above the sewing machine table 3, and the fastener F is fed in the direction of arrow P by fastener feeding rollers 7, 8 driven to rotate by a fastener supply motor M2 shown in FIG.

The zipper separator 9 is a zipper source 6
And the fastener feeding rollers 7, 8 to separate the engagement teeth of the fastener. The idler roller 10 has a function of cooperating with the fastener feeding rollers 7 and 8 to store a predetermined length of the fastener F as a slack in advance.

The tilting lever 11 serving as a fastener slack absorbing member has a roller 12 provided at the tip thereof in rolling contact with the upper surface of the fastener F, and has an upper limit position (solid line in FIG. 1) according to the amount of slack of the fastener F. It is reciprocated by its own weight between the lower limit position (two-dot chain line in FIG. 1).

That is, in the state where the large presser plate 4 is stopped at the preparation position in FIG.
Is rotated and the fastener F is extended, the fastener F is extended from a state shown by a solid line in FIG. 1 to a state shown by a chain line in the same figure, and a predetermined length of the fastener F is stored, and the tilt lever 11 is moved to the upper limit. Movement from the position to the lower limit position is stopped.

When the tilting lever 11 is moved to the lower limit position, the sensor 13 for detecting the lower limit position of the fastener slack absorbing member is pushed by the base end 11a thereof,
It confirms that the fastener F for a certain length has been stored, and generates a signal for stopping the rotation operation of the fastener feeding rollers 7 and 8.

Next, an operation control device of the fastener sewing machine will be described with reference to FIG.

A central processing unit (CPU) 14 determines whether or not a detection signal has been generated from the sensor 13 when the movement of the moving body 18 from the preparation position to the sewing completed position, that is, determines whether sewing has been completed. Sewing end determining means to perform
It constitutes a set error discriminating means, a stopping means, etc.
M15 and RAM 16 are provided.

The large presser plate drive motor M1 is connected to the CPU 14
Via a well-known drive circuit (not shown). When the motor M1 is rotated, the moving body 18 is driven to move the large presser plate 4 between the preparation position and the sewing completion position.

Further, the fastener supply motor M2 is connected to the CPU 14 via a well-known drive circuit (not shown). When the motor M2 is rotated, the fastener F is connected to the rollers 7, 8 and the idler roller. 10 and is stored in a slack state.

Next, the operation of the fastener sewing machine configured as described above will be schematically described.

FIGS. 2A and 2B show a sewing preparation state before the binder descends. The tilting lever 11 located between the fastener feeding rollers 7, 8 and the idler roller 10 is disposed at a lower limit position. And the state before the sewing preparation start with the sensor 13 turned on. FIG. 2A shows a state in which the tip of the fastener is biased and held on the fastener guide 19a of the binder 5 for fastener sewing.
FIG. 2B shows a binder 5 for sewing without fasteners.
2 shows a state in which the tip of the fastener is removed from the fastener guide 19a.

FIG. 3 (a) shows the case of fastener sewing, in which the binder 5 is lowered from the state shown in FIG. 2 (a), and as a result, the fastener F is moved by the fastener guide 19a.
Shows a state in which the tip of the cloth is guided to a position where the upper end of the cloth W on the sewing machine table 3 comes into contact (the start point of forming a seam of cloth).

At this time, if the fastener is set correctly, a part of the fastener in the storage portion is consumed by the lowering of the binder, and the sensor (detection means) 1
3 is in the OFF state, and can be started.

If the fastener F is not correctly set in the fastener guide 19a, a part of the fastener in the storage portion is not consumed even when the binder 5 is lowered, and the sensor remains in the ON state.
4 outputs an operation signal to the display 17 to indicate that the fastener F has not been set, and at the same time, stop operating.

On the other hand, FIG. 3 (b) shows the case of the fastenerless sewing, in which the binder 5 comes into contact with the upper surface of the cloth W after the tip of the fastener F is pulled back from the fastener guide 19a by the operator and separated. This shows a state in which it is lowered to a position where

At this time, the fastener F is the fastener guide 1
Since the fastener 13 is removed from the storage portion 9a, the fastener is not consumed from the storage portion, so that the sensor 13 remains in the ON state and the sensor 13 can be activated.

The front end of the fastener F has a fastener guide 1
9a, the fastener is consumed from the storage portion, the sensor 13 is turned off, and the
An operation signal is output from the U14 to the display 17, and the fact that the fastener F is set is displayed, and at the same time, the operation is stopped.

The operation of the CPU 14 at the time of the above-described fastener sewing and fastenerless sewing will be described with reference to the flowchart of FIG.

First, in an initialization routine after the power is turned on, the CPU 5 raises the binder 5 to move the moving body 18 to the sewing preparation position, and until the sensor 13 outputs an ON signal, the fastener feeding rollers 7, 8 are turned on.
To rotate. Thereafter, the operation waits for the operator to turn on the binder lowering switch 30 (step S1).

In the meantime, the operator operates the self-holding type fastener sewing switch (sewing specification storage means) 40 to select whether to perform the fastener sewing (switch on) or the sewing without the fastener (switch off). Is set, and the fastener F is set in the binder 5. At this time, the tip of the fastener F is held by the fastener guide 19a of the binder 5 for fastener sewing, and the tip of the fastener F is removed from the fastener guide 19a for sewing without fastener.

As described above, when the operator turns on the binder lowering switch 30, the CPU 14 lowers the binder 5 (step S2), and waits for the start switch 31 to be turned on (step S3).

When the operator turns on the start switch 31, the CPU 14 turns on the fastener sewing switch 40,
The off state is detected, and if it is on, the process proceeds to step S5 because fastener sewing is performed, and if it is off, the process proceeds to step S6 because sewing is performed without fastener (step S4).

Here, when the fastener sewing switch 40 is turned on, the CPU 14 determines whether or not the sensor 13 is off in step S5. At this time, if the tip of the fastener F is set to the fastener guide 19a of the binder 5, the CPU 13 starts sewing because the off signal is output from the sensor 13 (step S7). On the other hand, when the fastener F is not set, the ON signal is output from the sensor 13 so that the result of the step S5 is NO, and the display 17 displays the character "Fastener is not mounted", and the step S3 is performed. The process returns to (Step S8). For this reason,
After the operator turns off the start switch 31 and resets the fastener F, if the start switch 31 is turned on again, sewing is started.

Next, in the determination routine of step S4, when the fastener sewing switch 40 is turned off (in the case of sewing without fastener), the CPU 1
4 proceeds to the processing of step S6, and determines whether or not the sensor 13 is on. At this time, if the leading end of the fastener F is not set to the fastener guide 19a of the binder 5, an ON signal is output from the sensor 13, so the CPU 14 proceeds to step S7 to start the sewing machine motor and drive the large presser plate. The sewing machine is started by driving the motor M1.

On the other hand, if the fastener F is set in the fastener guide 19a of the binder 5, an off signal is output from the sensor 13, so that step S6 becomes NO, and the display 17 indicates that "the fastener is mounted".
Then, the process returns to step S3 (step S9).

For this reason, when the operator operates the start switch 31
Turn off the zipper and guide the tip of fastener F to zipper guide 1
9a (at this time, the tilting lever 11 is moved to the lower limit position by its own weight, and an ON signal is output from the sensor 13). Then, if the start switch 31 is turned on again, sewing without a fastener is started. Is done.

Therefore, sewing that does not conform to the program can be prevented.

The present invention is not limited to the above-described embodiment. Instead of using the sensor 13, a sensor for directly detecting the presence or absence of the fastener F at the seam forming point may be used. And each fastener F,
The deviation of the left and right fasteners may be detected using a sensor that individually detects F.

In the above-described embodiment, the fastener sewing switch is used as the sewing specification storage means.
The sewing specification data may be set and stored in the RAM 16.

[0041]

As described above in detail, according to the present invention, at the start of sewing, the presence or absence of a fastener is detected at the stitch forming point of the cloth by the detecting means. The setting error of the fastener is determined based on the sewing specification information stored in the storage means, and in the case of the setting error, the stopping means is configured to stop the activation of the feeding means. This has a very practical advantage that mistakes can be prevented and the occurrence of defective products can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a fastener sewing machine.

FIG. 2A is an explanatory diagram showing a sewing preparation state before a binder descends in the case of fastener sewing. (B) is an explanatory view showing a sewing preparation state before the binder descends in the case of sewing without fasteners.

FIG. 3A is an explanatory view showing a state after the binder descends in the case of fastener sewing. (B) is an explanatory view showing the state after the binder descends in the case of the sewing without the fastener.

FIG. 4 is a block diagram showing an electrical configuration of a control device of the fastener sewing machine.

FIG. 5 is a flowchart illustrating an operation of a CPU 14;

[Explanation of symbols]

 2 Needle 3 Sewing machine table 4 Large presser plate 5 Binder 11 Tilt lever 13 Sensor 14 CPU 40 Fastener sewing switch F Fastener W Cloth

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D05B 1/00-83/00

Claims (1)

(57) [Claims] 1. A stitch forming means for forming a stitch on a cloth placed on an upper surface of a sewing machine table, a feeding means for feeding the cloth to the opposite side through a stitch forming point, and a stitch on the upper surface of the cloth. In a fastener sewing machine having a guide means for supplying and guiding a fastener to a forming point, a sewing specification storing means for storing presence or absence of fastener sewing, and whether a fastener exists at a seam forming point of a cloth at the time of starting sewing. Detecting means for detecting the presence or absence of a fastener, discriminating means for discriminating a fastener setting error based on information on the presence or absence of a fastener from the detecting means and sewing specification information from the sewing specification storing means, A fastener sewing machine characterized by comprising a stopping means for stopping the activation of the feeding means when a setting error is determined.