JP2003019375A - Button sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a button sewing machine which surely receives and transfers buttons in a high-speed mode. SOLUTION: The machine is provided with a mode selecting means 64 for selecting one of the modes, i.e., a standard mode for moving a holding means 12 to a thread cutting position for obtaining an optimum remaining thread length after button sewing, cutting a thread and, then, moving the holding means 12 to a position P2 and the high-speed mode for moving the holding means 12 to a receiving and transferring position P2 after button sewing and cutting the thread. The machine is also provided with a control part 60 for selectively changing-over the standard mode and the high-speed mode based on a mode signal from the mode selecting means 64 and setting operation control corresponding to the changed-over mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button sewing machine suitable for sewing a button on a sewing object while moving the button and the sewing object and cutting the thread after the button sewing.

[0002]

2. Description of the Related Art Conventionally, there has been known a button-attaching sewing machine capable of automatically supplying a button to sew the button to a material to be sewn.

Such a conventional sewing machine for button attachment is
It is configured by attaching a button supply device to the sewing machine main body.

The sewing machine main body is, for example, an electronic single chain stitch sewing machine, and after sewing the feed device and the button, the sewing device to which the button is sewn is moved to obtain an optimum thread remaining length. A thread cutting device for cutting the thread is provided. The feeding device has a cloth pressing mechanism as a holding means for holding the button and holding the sewing object, and a cloth feeding mechanism as a feeding means for moving the cloth pressing mechanism. Further, the cloth pressing mechanism has a support plate for supporting the material to be sewn and a gripping device for clamping the button to be supplied and pressing the material to be sewn. The gripping device holds and releases the button. A possible button clamp mechanism is provided. In addition, the cloth feed mechanism includes two feed drive motors, which are pulse motors for moving the cloth pressing mechanism in the XY directions.
Furthermore, the thread trimming device constitutes a thread trimming means for cutting the thread after button sewing, and includes a fixed blade fixedly arranged below the needle plate of the sewing machine bed and rotatably supported by the needle plate. It is mainly configured by a movable blade that is installed. The movable blade can be driven by the driving force of the thread cutting solenoid.

The button supply device is for supplying the button to the button clamp mechanism of the holding means at the delivery position where the needle center and the center of the button coincide with each other after thread cutting. The button carrying device for carrying in line and the buttons ejected from the ejection holes of the button carrying device are received one by one at the receiving position, and the received buttons are moved from the receiving position to the delivering position, and then the holding means at the delivering position. It has a button transfer mechanism to be delivered to. This button transfer mechanism
From a pair of openable and closable shutter plates on which the buttons discharged so as to fall from the discharge holes of the button carrier are placed, and three claws which are arranged above the shutter plates and which can be expanded and contracted with respect to the center. Centering mechanism, a work attachment that is rotatably and vertically movable above the center of the centering mechanism, and a carrier pin that is inserted into the threading hole of the button is arranged on the free end side to receive the button. And a button carrier that is moved from the position to the button delivery position. In the button carrier, the driving force of the button carrier drive motor is used to set the position of the carrier pin to at least the receiving position located vertically below the discharge port and the delivering position where the needle drop position and the center position of the button match. It is generally rotatable so that it can move back and forth.

According to the conventional button sewing machine having such a structure, first, the button is carried by the button carrying device and is discharged from the discharge hole by natural fall. The button dropped from the discharge port is placed on the opening / closing part of the pair of shutter plates disposed below the discharge port, and the three claws of the centering mechanism are closed to move the button to the center. After positioning, the work attachment is rotated and lowered to insert the threading hole of the button in alignment with the carrier pin. Then, the shutter plate is opened and the work attachment is raised to pass the button to the button carrier.

Then, by rotating the button carrier with the driving force of the button carrier drive motor, the button inserted into the carrier pin is moved from the receiving position to the delivering position, and when the button reaches the delivering position, the button is released. It is held by the button clamp mechanism of the presser foot mechanism that stands by at the delivery position. Then, when the button is held by the button clamp mechanism, the button carrier returns to the receiving position.

Then, by driving the sewing machine motor, when the needle is moved up and down and the button is sewn on the material to be sewn by the seam, the cloth feed mechanism moves the cloth pressing mechanism based on a predetermined sewing pattern. As a result, the needles are dropped into the plurality of threading holes formed in the button in a predetermined order. Then, after the button sewing is completed after the sewing operation for sewing the button to the sewing object is completed, the cloth feed mechanism is driven to obtain the optimum thread remaining length for the button that is attached to the sewing object (for example, FIG. 5). (B) The distance L from the knot portion of the thread formed at the final needle drop position to the blade portion of the fixed blade is kept constant even if the centers of the threading holes of the button are different) The thread is cut by driving the thread cutting device with the thread cutting solenoid after the movement.

After thread cutting, the cloth feeding mechanism is driven to move the cloth pressing mechanism to a delivery position where the needle center and the center of the button are coincident with each other, so that the button for supplying the next button can be provided. It is formed so that it can receive the supply of.

In such a conventional button sewing machine, there is a standard mode in which the holding means is moved to the thread cutting position after button sewing and thread cutting is performed, and then the holding means is moved to the delivery position. Generally, a high-speed mode for shortening the cycle time is provided.

[0011]

However, in the above-mentioned conventional sewing machine for button attachment, there is no problem in the standard mode, but in the high-speed mode, the timing of delivering the button of the button supply device becomes faster. However, there is a problem in that the button supply device supplies the button to the delivery position before the cloth feeding mechanism moves to the delivery position.

That is, as shown in the timing chart of FIG. 10, in one of the standard modes, the cloth feeding mechanism reaches the thread cutting position from the upper position signal of the last needle of the sewing machine at TA time on the sewing machine main body side. The stop signal of the sewing machine motor is driven after the time Tb, which is the time required for the cloth feed mechanism to reach the delivery position, after driving the thread trimming solenoid for the thread trimming operation after the time Tb that takes the necessary movement time into account. The sewing machine stop signal is output to the button supply device. On the button supply device side, when the sewing machine stop signal is received, the button carrier drive motor is operated after a minimum Td time of about 100 ms required to open / close the shutter plate to prevent the button from being caught, and the button transfer position is reached. Have moved to.

Therefore, as shown in FIG. 10, in the standard mode, a button for moving the button carrier from the receiving position to the delivering position after the cloth pressing mechanism which is moved by the driving force of the feed drive motor moves to the delivering position. Since the carrier drive motor is driven, the buttons are reliably delivered from the button carrier to the button clamp mechanism of the cloth feed mechanism.

On the other hand, in the other high speed mode, when the button supply device receives the sewing machine stop signal, the shutter plate is not opened / closed and a minimum of 10 m is reached.
After Td 'time of about s, the button carrier drive motor is operated to move the button to the delivery position.

Therefore, as shown in FIG. 10, in the high speed mode, the button carrier which moves the button carrier from the receiving position to the delivering position before the cloth pressing mechanism which is moved by the driving force of the feed drive motor moves to the delivering position. Since the carrier drive motor is driven to supply the button to the receiving position, the button is not stably delivered from the button carrier to the button clamp mechanism of the cloth feeding mechanism.

Further, in any mode, since the holding means is moved to the thread cutting position after the button sewing and the thread cutting is executed and then the holding means is moved to the delivery position, in the high speed mode, Before the cloth feed mechanism moves to the delivery position, the button carrier of the button supply device may reach the delivery position and supply the button.

The sewing machine stop signal is not output after the sewing machine motor is actually stopped, but is output in anticipation of a time lag until the button supply device receives the sewing machine stop signal and moves to the delivery position of the button. It is like this.

The present invention has been made in view of this point, and an object of the present invention is to provide a button attaching sewing machine capable of reliably delivering and receiving buttons in a high speed mode.

[0019]

In order to achieve the above-mentioned object, the feature of the sewing machine for button attachment of the present invention according to claim 1 is that the holding means has an optimum thread remaining length after button sewing. And a high-speed mode in which the holding means is moved to the delivery position after performing the thread trimming and the holding means is moved to the delivery position after the button sewing. And a control unit for selectively switching between the standard mode and the high speed mode based on a mode signal from the mode selecting unit and setting operation control corresponding to the switched mode. There is a point to have. By adopting such a configuration, by performing thread trimming at the delivery position in the high speed mode, the moving operation of the holding means to the delivery position by the feeding means after button sewing can be performed at high speed. Therefore, the timing at which the cloth feeding mechanism moves to the delivery position can be made in time with the button supply timing of the button supply means at the delivery position. As a result, it is possible to reliably deliver the button at the delivery position in the high speed mode.

A feature of the button sewing machine of the present invention according to claim 2 is that the mode selecting means in claim 1 is a dip switch. By adopting such a configuration, it is possible to reduce the risk of an erroneous operation due to an inadvertent operation by the operator or an erroneous operation due to the contact of the operator.

[0021]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the embodiments shown in the drawings.

1 to 6 show an embodiment of a sewing machine for button attachment according to the present invention.

The button sewing machine 1 of this embodiment is capable of automatically supplying the button B to sew the button B to a material to be sewn such as cloth, and then to cut the thread T connected to the seam. As shown in FIG. 1, a sewing machine main body 2 composed of an electronic cycle sewing machine capable of performing at least a single chain stitch, and a button supply as a button supply means arranged on the side of the sewing machine main body 2. And device 3. The sewing machine main body 2 and the button supply device 3 have a sewing table 4 whose upper surface is formed substantially flat.
It is located above. And sewing machine for button 1
In FIG. 1, the lower side shown in the lower part of FIG. 1 is an operating side OS that faces each other to perform various operations and work when the operator performs a sewing operation, and the upper side of FIG. 1 is opposite to the operating side OS. It is assumed to be the back BS located on the side.

The sewing machine main body 2 is used to sew the button B to a material to be sewn (not shown), and as shown in FIG. 1, a sewing machine bed 5 attached at a predetermined position on the sewing machine table 4. , A sewing machine arm 6 extending above the sewing machine bed 5 in parallel to the sewing machine bed 5, and a sewing machine bed 5
And a sewing machine arm 6 and a pedestal portion 7 that connects the sewing machine arm 6 at the back side BS. A needle N is disposed at a desired position on the lower surface of the sewing machine head 6a located on the free end side of the sewing machine arm 6 with its longitudinal direction oriented vertically. As shown in FIG. 2, the needle N has a proximal end attached to the lower end of the needle bar 8. The needle bar 8 is, as is well known, a sewing machine motor 9 (FIG. 7).
The needle bar drive mechanism (both not shown) interlocked with the rotation of the drive shaft that is rotationally driven by is reciprocally movable with a predetermined stroke in the vertical direction. Further, the sewing machine main body 2 has a feeding device 10 and a thread cutting device 11, as shown in FIG.

As shown in detail in FIG. 3, the feeding device 10 holds a button B and holds a cloth pressing mechanism 12 as a holding means for holding a workpiece, and the cloth pressing mechanism 12
A cloth feed mechanism 1 as a feed means for moving the button based on a predetermined sewing pattern set according to the type of the button B.
3 and 3.

The cloth feed mechanism 13 includes a drive plate 14 formed in a flat plate shape, a drive source disposed inside the sewing machine bed 5, and a pair of left and right feed drive motors 15L including a pulse motor in this embodiment. , 15R.
In these feed drive motors 15L and 15R, the tips of their output shafts 15La and 15Ra are projected above the sewing machine bed 5, and these output shafts 15La and 15Ra and the base end of the drive plate 14 are eccentric members. 16, a pair of left and right driving force transmission mechanisms formed by the eccentric shaft 17, and the link member 18 are connected. The driving force transmission mechanism may be selected from various conventionally known structures.

The drive plate 14 has a link member 1 at the base end.
8 is rotatably connected to the other end of the sewing machine 8 and is arranged so as to extend along the upper surface of the sewing machine bed 5 so that the leading end thereof is located on the side of the sewing machine bed 5. An elongated hole-shaped guide hole 19 extending along the longitudinal direction is formed in a substantially central portion of the drive plate 14, and the guide hole 19 is rotatable about the support shaft 20 with respect to the sewing machine bed 5. The supported guide member 21 is the guide hole 1
9 is slidably fitted along the longitudinal direction. That is, the drive plate 14 is rotatable around the support shaft 20 of the guide member 21 and is guided by the guide member 21 and the guide hole 19 to thereby guide the guide hole 19.
It is configured to be swingable around the support shaft 20 within the range of the longitudinal direction.

The cloth pressing mechanism 12 is provided with a support plate 22 for supporting the material to be sewn from below, and a gripping device 23 for clamping the button B and pressing the material to be sewn. The base end portion of the support plate 22 is fixed to the tip end portion of the drive plate 14, and the support plate 22 penetrates through the support plate 22 in a plate thickness direction through which a needle N that moves up and down at least in a sewing state can pass. A square hole-shaped through hole is formed.

The gripping device 23 is a conventionally known support frame 24 extending substantially parallel to the tip of the drive plate 14 and a button B provided at the tip of the support frame 24 for holding and releasing the button B. The button clamp mechanism 25 of FIG. The base end portion of the support frame 24 is rotatably supported at a substantially central portion in the longitudinal direction of the drive plate 14 so that the tip end portion thereof can move up and down. Also,
The gripping device 23 is always urged downward by an urging force of a spring (not shown), and the urging force presses the button clamp mechanism 25 onto the support plate 22 so that the workpiece can be clamped. Has become. further,
The gripping device 23 is provided with a presser foot lifting mechanism 29 including a presser foot lifting link 27 and a presser foot lifting lever 28 which are driven by a presser foot lifting solenoid 26 shown in FIGS. 2 and 4.
The gripping device 23 is raised against the biasing force to release the pinching of the sewing object.

The two feed drive motors 15L and 15R
The drive plate 14 moves in the longitudinal direction of the guide hole 19 by the driving of the guide hole 19 and swings in the left-right direction about the support shaft 20. As the drive plate 14 moves, the support plate 22 and Button clamp mechanism 25
Also moves back and forth and left and right.

That is, the two feed drive motors 15L,
The support plate 22 and the button clamp mechanism 25 move to arbitrary positions in the horizontal plane by individually controlling the rotation direction and the rotation amount of the 15R.

As a result, the needle N is moved in a predetermined order by moving the support plate 22 and the button clamp mechanism 25 according to the type, size, and sewing pattern of the button B held by the button clamp mechanism 25. A single ring stitch is formed through the threading hole Ba (FIG. 5) of the button B so that the button B can be sewn to the material to be sewn.

The thread cutting device 11 constitutes a thread cutting means for cutting the thread T (FIG. 2) after the sewing of the button B, and as shown in FIG. 4, the thread cutting device 11 of the present embodiment.
Is mainly composed of a needle plate 30, a movable blade 31, and a fixed blade 32. The needle plate 30 is the support plate 22.
The needle hole 33 is fixed to the needle drop position of the sewing machine bed 5 so as to oppose to, and a long hole-shaped needle hole 33 penetrating in the plate thickness direction is formed at substantially the center thereof. In addition, fixed blade 3
2 is fixed to the lower surface of the needle plate 30 facing one end in the left-right direction of the needle plate 30, and the movable blade 31 is rotatably supported around a movable blade support shaft 34 fixed to the needle plate 30. ing. Then, by rotating the movable blade 31 toward the fixed blade 32 by the thread cutting drive mechanism 35, the fixed blade 32 and the movable blade 31 cooperate with each other to sew the thread T after sewing.
Can be disconnected.

The thread trimming drive mechanism 35 in this embodiment
Has a thread cutting lever 36, a thread cutting arm 37, and a connecting plate 38, as shown in detail in FIG. Then, the thread trimming drive mechanism 35 can drive the movable blade 31 in conjunction with the presser foot lifting link 27 driven by the presser foot lifting solenoid 26.

That is, the presser foot lifting solenoid 26 of the present embodiment also serves as the thread trimming solenoid 39 as a drive source for driving the thread cutting device 11, and the output shaft 26a of the presser foot lifting solenoid 26 is moved backward. A lifting operation of lifting the gripping device 23 to release the pinching of the sewing object is performed, and the movable blade 31 is driven in conjunction with the lifting operation to drive the movable blade 31 to sew the thread T after sewing. It is possible to perform a thread cutting operation for cutting.

After the thread is cut, the button supply device 3 causes the button clamp mechanism 25 of the holding means to transfer the button B to the button clamp mechanism 25 at the delivery position P2 where the needle drop position shown in FIG. As shown in FIGS. 1 and 5, the button B is for supplying the buttons B, and the button carrying mechanism 40 for carrying a number of buttons B in an aligned manner, a discharge port of the button carrying mechanism 40, and a second ejecting mechanism described later in detail. Exit 48
Positions P1 for receiving the buttons B ejected from a one by one
And the button transfer mechanism 41 which transfers the received button B to the transfer position P2 from the reception position P1 and transfers it to the button clamp mechanism 25 of the holding means at the transfer position P2.

As shown in FIG. 5, the button feeding mechanism 40 is provided with a button supply section 42 on the right side in FIG. 5 which is the farthest from the sewing machine body 2. The button supply section 42 is on the sewing machine body 2 side. Is provided with an outlet 42a for the button B. Then, on the left side of the button supply unit 42, a first disc-shaped first rotating plate drive motor 43, which is a pulse motor or the like, is driven by a driving force of a first rotating plate drive motor 43 to perform an intermittent rotation motion every 90 degrees.
A rotary plate 44 is provided, and a first support plate 45 is provided below the first rotary plate 44. Then, on the outer peripheral portion of the first rotary plate 44, four cutout portions 44 arranged at equal distances from the center position of the first rotary plate 44 at equal angles.
a is formed. Then, the buttons B, which are delivered from the delivery port 42a and drop, are fitted one by one into the notches 44a formed in the first rotary plate 44, and the lower surface thereof is first
The first rotating plate 44 is supported by the supporting plate 45.
The rotation of the button B allows the button B fitted in the cutout portion 44a to move along the first horizontal arcuate path 46.

Further, at a position of the first support plate 45 on the sewing machine main body 2 side, a button B for moving on the first horizontal arcuate path 46.
Is provided with a first outlet 45a for discharging the
The button B that moves on the first support plate 45 along the first horizontal arcuate path 46 moves in the middle of the first horizontal arcuate path 46, specifically, to the side of the sewing machine main body 2 where the button B has rotated 180 degrees from the delivery port 42a. At that time, the first support plate 45 is configured to drop downward from the first discharge port 45a.

On the left side of the first support plate 45, the driving force of the first rotary plate drive motor 43 is transmitted by a gear train or a belt (not shown) so that the first rotary plate 44 interlocks with the rotary motion. A plate-shaped second rotary plate 47 is provided, and a second support plate 48 is provided below the second rotary plate 47. Then, in the vicinity of the outer peripheral portion of the second rotary plate 47, a plurality of button insertion holes 47a, which are arranged at equal distances from the center position of the second rotary plate 47 and equidistantly, in the present embodiment, are formed. There is. Then, the buttons B dropping from the first discharge port 45a are respectively inserted into the button insertion holes 47a formed in the second rotary plate 47 which is interlocked with the first rotary plate 44 and intermittently rotates every 45 degrees. The button B inserted into the button insertion hole 47a can be moved along the second horizontal arcuate path 49 by being inserted and supporting the lower surface thereof by the second support plate 48, and by the rotation of the second rotary plate 47. Has been done. Further, at a position of the second support plate 48 on the sewing machine main body 2 side, a second discharge port 48 a for discharging the button B moving on the second horizontal arcuate path 49 downward is provided, and the second support plate 48 is provided. Button B, which moves up along the second horizontal arcuate path 49, is the second horizontal arcuate path 4
In the middle of 9, button B from the first outlet 45a 1
When it moves to the sewing machine main body 2 side rotated by 80 degrees, the second
The support plate 48 is configured to drop downward from the second discharge port 48a. The arrangement position of the second discharge port 48a is the receiving position P1 of the button B by the button transfer mechanism 41.
It is said that. The rotation of the second rotary plate 47 may be controlled by a drive motor similar to the first rotary plate drive motor 43, which is arranged separately from the first rotary plate drive motor 43.

As shown in FIG. 6, the button transfer mechanism 41 includes a pair of openable / closable shutter plates 51 on which the button B discharged so as to fall from the second discharge port 48a of the button transport mechanism 40 is placed. And an aligning mechanism 52 which is arranged above the shutter plate 51 and is composed of three claws which can be expanded and contracted with respect to the center, and is arranged above the center of the aligning mechanism 52 so as to be rotatable and vertically movable. Work attachment 53,
A button carrier drive motor 5 including a pulse motor or the like in which the same number of carrier pins 54 as the threading holes Ba of the button B which are inserted into the threading hole Ba of the button B are provided on the free end side.
The button B is received at the position P with the driving force of 5 (FIG. 7).
The button carrier 56 is moved from 1 to the button B delivery position P2. The work attachment 53 is rotatable and vertically movable by the driving force of the rotation motor 57 and the lifting air cylinder 58.

In the button transfer mechanism 41, the pair of shutter plates 51 are always positioned below the second discharge port 48a in the closed state, and the button B falling from the second discharge port 48a is in the closed state. Then, the button B is held on the shutter plate 51 by the centering mechanism 52, and the center of the button B and the center of the opening / closing portion of the shutter plate 51 are aligned with each other. ing.
As a result, the center of the button B is at the center of the carrier pin 54 of the button carrier 56 waiting below the shutter plate 51.
It also matches the center of. Also, button B
When the center of the shutter plate 51 coincides with the center of the opening / closing part of the shutter plate 51, the shutter plate 51 is opened and the work attachment 53 waiting above the second discharge port 48a is operated by the operation of the rotation motor 57 and the lifting air cylinder 58. Is rotated and lowered, and button B is pressed and rotated. As a result, the threading hole Ba of the button B is inserted into the carrier pin 54 of the button carrier 56 standing by below the shutter plate 51. Where button B
The threading hole Ba of the carrier pin 5 of the button carrier 56
4, the button B is positioned below the three claws (not shown) of the centering mechanism 52, so that the three claws biasing the outer peripheral edge of the button B toward the center are closed and the button B of the button B is closed. A sensor (not shown) detects that the threading hole Ba has been inserted into the carrier pin 54 of the button carrier 56, and based on this detection signal, the shutter plate 51 is closed and the work attachment 53 is raised. ing. After that, the button B is the button carrier drive motor 5
When the button carrier 56 is rotated by the driving force of 5, the button carrier 56 is transferred from the receiving position P1 to the delivering position P2, and is held by the button clamp mechanism 25 at the delivering position P2. Then, when the button B is held by the button clamp mechanism 25, the button carrier 56 returns to the receiving position P1, and the sewing machine main body 2
The buttoning is executed by the operation of.

Next, an example of the control unit will be described with reference to the block diagram shown in FIG.

As shown in FIG. 7, the control section 60 which controls the button sewing machine 1 of the present embodiment has at least a CPU 61 and a memory 62 formed by a ROM, a RAM and the like having an appropriate capacity. ing. The control unit 60 includes at least the sewing machine motor 9, the feed drive motors 15L and 15R, the presser foot lifting solenoid 26, the first rotary plate drive motor 43, the button carrier drive motor 55,
A rotation motor 57, a lifting air cylinder 58, an operation panel 63, a start pedal (not shown) as a sewing start switch, etc. are electrically connected. In addition, the operation panel 6
Reference numeral 3 includes a DIP switch 64 as a mode selecting means for selecting at least one of the standard mode and the high speed mode, a power switch (not shown), a picture display used for setting operation display and sewing operation, an input key, and the like. Various switches such as a touch panel, a sewing pattern selection switch, and various indicators such as LEDs are provided. The mode selection means is not limited to the DIP switch 64, and various types of switches such as a push button switch and a rotary switch can be selected and used, but there is a risk of malfunction due to careless operation by the operator or erroneous operation due to operator contact. It is preferable to use the DIP switch 64 in the sense that it has less property.

In the memory 62, at least the standard mode and the high speed mode are selectively switched based on the mode signal from the dip switch 64 as the mode selection means, and the operation control corresponding to the switched mode is set. The operation program of is stored. As this operation program, after the button sewing for performing the standard mode, the cloth pressing mechanism 12 as the holding means is moved to the thread trimming position where the optimum thread remaining length after thread trimming is obtained, and thread trimming is executed. After the presser foot mechanism 12
A program for setting operation control for moving to the delivery position P2 and a program for setting operation control for moving the work clamp mechanism 12 to the delivery position P2 and performing thread trimming after button sewing for performing the high speed mode are illustrated. it can. The operation timing in this high speed mode will be described later.

The memory 62 is also adapted to store a program for performing an initialization operation when the button sewing machine 1 is powered on, and various data and programs necessary for a sewing operation.

The other structure is the same as that of the conventionally known button sewing machine 1, and therefore its detailed description is omitted.

Next, the operation of this embodiment having the above-mentioned structure will be described.

The button attachment operation in the standard mode of the button attachment sewing machine 1 of the present embodiment is the same as that of the conventional art, and therefore the detailed description thereof will be omitted and only the portion related to the gist of the present invention will be described.

First, the button sewing machine 1 of the present embodiment.
The operation before the start of sewing will be described with reference to the flowchart shown in FIG.

As shown in the flowchart of FIG. 8, the operation of the button sewing machine 1 of the present embodiment before the start of sewing determines whether or not a sewing preparation completion switch (not shown) is turned on in step ST01. , If the ON operation has not been performed, the judgment in step ST01 is ON.
Wait until operated.

If the ON operation is performed in the judgment of the step ST01, the process proceeds to step ST02, and it is judged in step ST02 whether the DIP switch 64 is in the standard mode or not. In ST03, the mode is switched to the standard mode, and the operation control of each part is performed in the standard mode based on a program stored in the memory 62 for controlling the operation of the standard mode. The setting is made so as to correspond to the operation of moving the cloth pressing mechanism 12 to the thread cutting position and executing the thread cutting, and then moving the cloth pressing mechanism 12 to the delivery position P2, and then proceeds to the next step ST05.

If the determination in step ST02 is in the high speed mode, the process proceeds to the next step ST04, the mode is switched to the high speed mode, and the operation control in the high speed mode is stored in the memory 62 based on the program. The operation control of each part is set to the high speed mode, more specifically, the operation of moving the cloth pressing mechanism 12 to the delivery position P2 after button sewing to execute thread trimming, and proceeds to the next step ST05.

Next, in step ST05, it is determined whether or not a sewing start switch (not shown) has been operated, and if it has not been operated, step ST05
Wait until the judgment of is turned on.

If the ON operation has been performed in the judgment of the step ST05, the process proceeds to the next step ST06, and a series of operations of sewing, more specifically, button attachment, thread trimming and button supply are executed and terminated. .

Next, the operation timing in the high speed mode by the button sewing machine 1 of this embodiment will be described with reference to the timing chart shown in FIG.

As shown in the timing chart of FIG.
In the high-speed mode of the button sewing machine of the present embodiment, on the sewing machine main body 2 side, the movement time required for the cloth feed mechanism 13 to reach the delivery position P2 from the upper position signal of the last needle of the sewing machine at the TA time. Tb in anticipation
A sewing machine stop signal, which is a stop signal for the thread cutting solenoid 39 and the sewing machine motor 9, is output to the button supply device 3 for thread cutting operation after a lapse of time. When the button supply device 3 receives the sewing machine stop signal, the button carrier drive motor 55 is operated after a minimum Td 'time of about 10 ms without opening / closing the shutter plate 51, and the button delivery position P2 is reached. Have moved to.

That is, in the present embodiment, from the upper position signal of the last needle of the sewing machine at TA time, Tb + T
While the button carrier drive motor 55 is driven after d'time, conventionally, the button carrier drive motor is driven after Tb + Tc + Td 'time from the upper position signal of the last needle of the sewing machine at TA time.

Further, as shown in FIG. 9, in the high speed mode of the button sewing machine 1 of this embodiment, the cloth pressing mechanism 12 which is moved by the driving force of the feed drive motors 15L and 15R is moved to the delivery position P2. After that, the thread trimming solenoid 39 that drives the thread trimming device 11 and the button carrier drive motor 55 that moves the button carrier 56 from the receiving position P1 to the delivering position P2 are driven, so that the button carrier 56 presses the button clamp of the cloth feeding mechanism 13. The button B is reliably delivered to the mechanism 25.

Therefore, according to the high speed mode of the button sewing machine 1 of this embodiment, as shown in FIG. 9, the cloth pressing mechanism 12 which is moved by the driving force of the feed drive motors 15L and 15R is moved to the delivery position P2. After that, the button carrier 56 moves from the receiving position P1 to the passing position P.
Since the button B is moved to position 2, the button B is reliably transferred from the button carrier 56 to the button clamp mechanism 25 of the cloth feed mechanism 13.

As described above, according to the button sewing machine 1 of the present embodiment, the control unit 60 can switch between the standard mode and the high speed mode based on the mode signal from the dip switch 64 as the mode selecting means. At the same time, thread cutting is performed at the delivery position P2 in the high speed mode, so that the cloth pressing mechanism 1 as a holding means by the cloth feeding mechanism 13 as a feeding means after button sewing.
Since the moving operation of 2 to the delivery position P2 can be performed at high speed, the cloth feeding mechanism 13 moves to the delivery position P2 at the timing of the button B supplied by the button supply device 3 as the button supply means at the delivery position P2. The timing can be surely made in time. As a result, the button B at the delivery position P2 in the high speed mode
Can be surely delivered, specifically, the delivery of the button B from the button carrier 56 to the button clamp mechanism 25.

When the thread is cut at the delivery position P2, the remaining thread length after thread cutting is longer than when the thread is cut at the thread cutting position.

Further, the sewing machine 1 for attaching buttons according to the present embodiment.
According to the above, since the mode selection means is formed by the DIP switch 64, it is possible to reduce the risk of an erroneous operation due to an inadvertent operation by the operator or an erroneous operation due to the contact of the operator.

The present invention is not limited to the above embodiment, but various modifications can be made as necessary.

[0064]

As described above, according to the button-attaching sewing machine of the present invention according to the first aspect, it is possible to reliably deliver the button at the delivery position in the high speed mode.

Further, according to the sewing machine for button attachment of the present invention according to claim 2, careless operation by an operator,
This has an extremely excellent effect such that the risk of malfunction due to a malfunction caused by operator contact can be reduced.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an essential part of the overall configuration of an embodiment of a button sewing machine according to the present invention.

FIG. 2 is an external perspective view of a main part of the sewing machine main body shown in FIG.

FIG. 3 is an external perspective view of essential parts of the cloth pressing device and the cloth feeding device of the sewing machine main body shown in FIG.

FIG. 4 is a perspective view of the essential parts of the thread trimming device and the thread trimming drive mechanism of the sewing machine body shown in FIG.

5 is a plan view of the button supply device of FIG.

6 is a front view of the vicinity of a button transfer mechanism of the button supply device of FIG.

FIG. 7 is a block diagram showing an example of a control unit of an embodiment of a button sewing machine according to the present invention.

FIG. 8 is a flowchart showing an operation of a main part of the sewing machine for buttons according to the present invention before starting sewing.

FIG. 9 is a timing chart showing operation timings in a high speed mode of the button sewing machine according to the present invention.

FIG. 10 is a timing chart showing operation timings of a conventional button sewing machine in a standard mode and a high speed mode.

[Explanation of symbols]

1 button sewing machine 2 sewing machine body 3 button feeder 9 sewing machine motor 10 feeder 11 Thread cutting device 12 Presser mechanism (holding means) 13 Cloth feeding mechanism (feeding means) 15L, 15R feed drive motor 23 Grasping device 25 button clamp mechanism 26 Presser lift solenoid 29 Lifting mechanism 30 needle plate 31 movable blade 32 fixed blade 35 Thread trimming drive mechanism 39 Thread cutting solenoid 40-button transport mechanism 41 Button transfer mechanism 51 Shutter plate 52 Alignment mechanism 53 Work attachment 55 button carrier drive motor 56 button carrier 60 control 61 CPU 62 memory 63 Operation panel 64 DIP switch (mode selection means) B button Ba threading hole N needle T thread P1 receiving position P2 delivery position

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3B150 AA23 BA06 BB02 CE01 CE03                       CE07 CE22 CE24 CE27 EH01                       EH08 EH15 EH17 FH02 FH06                       FH09 GE03 GE12 GF02 GF03                       JA03 JA11 JA28 LA32 LA82                       LA85 LB02 NA31 NA72 NA76                       NB13 NB16 NC02 NC03 NC11                       QA04 QA06 QA07

Claims (2)

[Claims] 1. A holding means capable of holding a button and a material to be sewn to sew the button, a feeding means for moving the holding means based on a predetermined sewing pattern, and a thread trimmer for cutting the thread after sewing the button. And a button supply means for supplying the button to the holding means at a delivery position where the center of the button and the center of the button coincide with each other after thread cutting. A standard mode in which the holding means is moved to the delivery position after moving to the thread cutting position where the remaining length is obtained, and the thread cutting is performed by moving the holding means to the delivery position after button sewing. Mode selecting means for selecting one of the high speed mode, and the standard mode and the high speed mode based on the mode signal from the mode selecting means. With switching to 択的, button sewing sewing machines, characterized in that a control unit for setting an operation control corresponding to the switching mode. 2. The button sewing machine according to claim 1, wherein the mode selection means is a DIP switch.