JP2515448B2 - Button supply control device in button 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 an automated technique for a button-attached sewing machine, and more particularly to a button-feed controller for a button-attached sewing machine in which a button-feed carrier and a material to be sewn do not interfere with each other.

[0002]

2. Description of the Related Art Conventionally, a swivel arm has been used as a button supply carrier for automatically supplying buttons one by one from a button supply device to a button holding portion which is formed at a needle drop position of a button sewing machine. That is, as shown in FIG. 7, the button holding portion 52 of the button placing device 51 is formed above the needle drop portion of the sewing machine main pair 50, and the turning drive shaft 55 is separated from the button holding portion 52. A button supply carrier 53 having an arm 54 is configured so that a button supply device 56 automatically and intermittently supplies a button to the button holding portion 52. It has become possible to automatically attach buttons by the sewing machine even in a place relatively deep from the end of the cloth.

In the button sewing machine having the above structure, the button a is supplied to the set pin 54a of the swivel arm 54, and the swivel operation of the swivel arm 54 (arrow A) causes
The button a is conveyed to the button holding portion 52 of the button placement device 51. When the button-sewn cloth b is inserted into the pocket 57 under the button holding portion 52 and the button-sewn portion is stereotactically set, the worker presses the start switch to start the button-attaching work, and the button a is The button-sewn cloth b is sewn. When the buttoning work is completed, the swivel arm 54 conveys the button a again to the button holding portion 52.

[0004]

However, in the button sewing machine having the above structure, the button supplying carrier 53 is used.
Since the button is supplied to the button holding portion 52 of the sewing machine main body 50 by turning the turning arm 54 immediately after the sewing of the button a to the button-sewn cloth b is completed, As shown in FIG. 6, when the button attachment portion of the button sewn cloth b is located a considerable distance L (30 cm or more) from the end, when the button sewn cloth is removed from the pocket 57, the button holding portion It has a drawback of interfering with the swivel arm 54 that has swung toward 52, and not only has very poor workability, but also may cause injury due to contact with an operator, which is a safety problem. was there.

The present invention has been made in view of the above problems, and is preferable because the button supply carrier for delivering the button to the button holding portion of the sewing machine and the button sewn cloth do not interfere with each other during the work. An object of the present invention is to provide a button supply control device for a button-attached sewing machine which operates at a timing and has an excellent workability and safety.

[0006]

A button supply control device in a button-attached sewing machine according to the present invention is a button placement device 3 having a button holding portion formed in a needle drop portion of a sewing machine main body.
And a button supply device 6 arranged near the button placement device 3 for discharging buttons one by one, and a button supply device for transferring the button from the button supply device 6 to the button holding portion of the button placement device 3. In the button sewing machine 1 including the carrier 2, the button supplying carrier 2 receives the button to be sewn from the button supplying device at its tip and also passes the swivel arm 7 to the button holding portion of the button placing device 3. The base end of the rotary drive shaft 8 is pivotally attached to the rotary drive shaft 8, and the button supply device and the button mounting device are supported for horizontal horizontal displacement, and the rotary drive shaft and the control motor 11 are pivotally connected. , The revolving arm 7 is reciprocally driven within a predetermined range via a control motor 11 which is rotationally driven by a control signal from the central control unit CPU, and
Button-sewn cloth sensor 1 for detecting the end of button-sewn cloth b
2 is installed in the vicinity of the needle drop portion of the sewing machine main body, a drive signal for controlling the control motor is input to the central control unit CPU, and the button-sewn cloth sensor 12 detects the button-sewn cloth b. It is a gist that the button supply operation of the button supply carrier 2 is prohibited during the operation.

[0007]

According to the present invention, the button supplying device 6 is provided to the button placing device 3 formed in the needle drop portion via the button supplying carrier 2.
In the button-attached sewing machine for transferring buttons from the button, the button supply carrier 2 is constructed by pivotally attaching the base end of the pivot arm 7 pivoted by the control motor 11 to the pivot drive shaft 8.
Then, the control motor 11 causes the swivel arm 7 to move based on the control signal from the central control unit CPU by the detection signal of the button-sewn cloth sensor 12 which detects the end of the button-sewn cloth b near the needle drop portion of the sewing machine body 1a. Is controlled to reciprocate. As a result, while the button sewn cloth sensor 12 is detecting the button sewn cloth b, the button supply operation of the button supply carrier 2 is prohibited.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a button supply control device for a button sewing machine according to the present invention will be described below with reference to FIGS.

The drawing shows the structure between the button-equipped sewing machine 1 and the button supply device 6. The reference numeral 1a denotes a button-equipped sewing machine main body. The sewing machine main body 1a is provided with a button a from a button supply carrier 2 described later. The pinching feet 4a, 4 of the fork-shaped button holding portion 4 for receiving, opening and closing, and gripping
The button mounting device 3 including a is configured, and a pocket 5 is configured between the button mounting device 3 and the tubular bed 1b of the sewing machine main body 1a. The button supplying carrier 2 is a mechanism for connecting the button mounting device 3 and the button supplying device 6 provided in the vicinity of the button mounting device 3 of the sewing machine main body 1a, and is supplied from the button supplying device 6. Button a
Each one is picked up and transferred between legs 4 and 4.

The button supply carrier 2 has one end of a revolving arm 7 pivotally mounted on a revolving drive shaft 8 which is vertically installed, and the button transfer device 6 has a button transfer passage 6a at its final end and a button mounting device. 3 for carrying the sewn button a so as to be pivotally displaced in the range of the arrow A direction, and for receiving the sewn button a from the button supply device 6 (the final end of the button transfer passage 6a) at the other end of the swivel arm 7. The two set pins 9 and 9 are axially fixed. Further, a control motor 11 for reciprocating the revolving arm 7 within the range of arrow A is connected to the revolving drive shaft 8. Therefore, when the other end of the revolving arm 7 is displaced by the control motor 11 to a position directly below the pinching feet 4a, 4a of the button mounting device 3, the two pinching feet 4a, 4a move the set pin 9, 9 of the revolving arm 7 to the outside. Only the sewn button a that has been inserted and supported is received and pinched. After passing the button, the turning arm 7 is turned backward by the control motor 11, and is moved backward to the final end of the button feeding device 6 again to receive the next button feeding and stand by.

Reference numeral 12 denotes a button sewn cloth sensor fixed near the needle drop portion of the sewing machine tubular bed 1b, which detects the end of the button sewn cloth b inserted in the pocket 5 and will be described later with reference to FIG. In the block diagram to be executed, "cloth set" and "cloth reset" of the button-sewn cloth b are output to the central control unit CPU.
Then, drive signals "ON" and "OFF" for controlling the rotation of the control motor 11 are input to the central control unit CPU, and the button-sewing cloth sensor 12 detects "ON" for the button-sewing cloth b. During this period, the button supply operation of the button supply carrier 2 is prohibited, and the revolving arm 7 is maintained in a standby state on the button supply device 6 side.

In the figure, the button 14 is intermittently sent one by one from the button supply device 6 to the final end of the button transfer passage, and is securely inserted into the set pins 9, 9 at the other end of the revolving arm 7. As described above, it is a button correction member for lowering to the upper surface of the button a and rotating the button a to hold it at a predetermined position (see FIG. 2).

Further, since the button-sewn cloth sensor 12 detects whether the button-sewn cloth b is "present" or "not present" in the pocket 5 under the needle, it is a mechanical sensor or an optical sensor. Needless to say, various types of electronic sensors and the like can be implemented.

Next, FIG. 3 is a block diagram of a sewing machine with buttons according to the present invention. Data and commands sent from the input operation device 15 and the button sewn sensor 12 are input to the central control unit CPU, and the button sewing machine 1, the button supply device 6, the buttons are input based on those inputs. The correction member 14 is driven and the central control unit CP
The control signal from U drives and controls the control motor 11 via the motor drive circuit 13, whereby the revolving arm 7 is reciprocally driven.

FIG. 4 is a timing chart showing the detection of the button sewn sensor 12 and the timing of the control motor 11 shown in the above block diagram, and the operation for carrying out this timing chart is performed according to the flow chart shown in FIG. explain. (1) After sewing the buttons, take out the button-sewn cloth b from the head pocket 5. (2) When the button sewn cloth b is removed from the button sewn sensor 12 provided near the needle drop point, "cloth reset" is detected and an "OFF" signal is output to the central control unit CPU,
"Drive reference timing P1" of the button supply carrier 2
Set. (3) After the lapse of time t1 (= 0.5 seconds) preset by the timer built in the central control unit CPU, the control motor 11 is driven to rotate the swivel arm 7 of the button supplying carrier 2.
Is swung forward from the button supply device 6 to the button placement device 3, and the button a gripped by the swivel arm 7 is delivered to the button holding portion of the button placement device 3. (4) When the button is transferred to the button placement device 3, the control motor 11 is drive-controlled by the central control device CPU (drive reference timing P2; see FIG. 4), and the revolving arm 7 is moved.
Moves backward from the button mounting device 3 and moves backward, and the button supply device 6
Returning to the position, the revolving arm 7 waits while holding the next button a. (5) When the next button sewn cloth b is inserted into the pocket 5, the button sewn cloth sensor 12 detects the "cloth set" state, and the "ON" signal is output to the central control unit CPU, and the sewing machine Button sewing becomes possible. (6) When the button attachment position of the button-sewn cloth b is aligned with the position below the button holding portion of the button placement device 3 and the sewing machine 1 is turned “ON”, the button b is automatically sewn at that position. (7) Return to the operation process of (1) above.

That is, as in the above (4) and (5),
Even if the previous buttoning is completed, the button-sewn sensor 12
While the button-sewn cloth b is being detected, the swivel arm 7 of the button supply carrier 2 does not move forward and forward toward the button placement device 3. Therefore, even if the button attachment position is deep (30 cm or more) from the cloth edge and it takes a long time to remove the swivel arm 7 during the removal.
Is prevented from moving to the portion and interfering with the button-sewn cloth b, the operator's finger or the like.

[0017]

As described above, according to the button supply control device for the button-attached sewing machine according to the present invention, the button-attached sewing cloth is not completely removed from under the needle of the button-attached sewing machine. The next button is not supplied to the button placement device by the carrier for the button, and even if the button attachment position is deep from the edge of the cloth and the cloth removal time is long, the swivel arm can be removed during removal. Is prevented from moving to the part and interfering with the button-sewn cloth, the operator's fingers, or the like, so that it has excellent workability and safety. The effect is extremely large.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts showing an embodiment of a button supply control device in a button sewing machine according to the present invention.

FIG. 2 is a partially enlarged front view of what is shown in FIG.

FIG. 3 is a block diagram of a button supply control device in the button sewing machine shown in FIG.

FIG. 4 is a timing chart showing the operation timing of each part shown in FIG.

5 is a flowchart showing an operation for carrying out the timing chart of FIG.

FIG. 6 is a perspective view showing an example of a product after attaching a button.

FIG. 7 is a perspective view of a main part of a conventional button sewing machine.

[Explanation of symbols]

 1 button sewing machine 2 button supply carrier 4 button gripping part 4a gripping foot 3 button placement device 5 pocket 6 button supply device 7 swivel arm 8 swivel drive shaft 11 control motor 12 button sewing cloth sensor 13 motor drive circuit CPU central Control device a Button b Button covered cloth

Claims (1)

(57) [Claims] 1. A button placing device having a button holding portion formed in a needle drop portion of a sewing machine main body, a button feeding device configured in the vicinity of the button placing device for ejecting buttons one by one, and the button feeding device. A button-attaching sewing machine comprising a button-supplying carrier for transferring a button from the button-placing device to the button-placing device, wherein the button-supplying carrier receives a button to be sewn from the button-supplying device at its tip, and The swivel arm has a base end pivotally attached to a swivel drive shaft for delivering the swivel arm to a button clamp portion of the mounting device, and the button supply device and the button mounting device are supported so as to be swivelable in a horizontal direction, and the swivel drive is performed. It has a structure in which a shaft and a control motor are pivotally connected, and the revolving arm is moved within a predetermined range through the control motor which is rotationally driven by a control signal from a central control unit. A button-sewn sensor for detecting the button-sewn cloth is installed near the needle drop point of the sewing machine main body while the backward rotation drive is performed, and a drive signal for controlling the control motor is input to the central control unit. A button in a sewing machine with buttons, characterized in that the button supply operation of the carrier for button supply is prohibited while the sensor cloth for button sewing detects the cloth for button sewing. Supply control device.