JP4739587B2 - Sewing machine for buttons - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a button sewing machine suitable for sewing a button to a sewing product while moving the button and the sewing product, and cutting a thread after the button is sewn.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a button sewing machine that can automatically supply buttons and sew the buttons to a sewing product is known.
[0003]
Such a conventional button attaching sewing machine is configured by attaching a button supply device to the sewing machine body.
[0004]
The sewing machine main body is, for example, an electronic single-ring sewing machine, and after the feed device and the button are sewn, the workpiece to which the button is sewn by the feed device is moved so that the optimum thread remaining length is obtained. Is provided with a thread trimming device. The feeding device includes a cloth presser mechanism as a holding unit that holds the workpiece while holding the button, and a cloth feed mechanism as a feed unit that moves the presser mechanism. Further, the presser foot mechanism has a support plate for supporting the sewing product, and a gripping device for clamping the supplied button and pressing the sewing product. The gripping device holds and releases the button. A possible button clamp mechanism is provided. Further, the cloth feed mechanism includes two feed drive motors including a pulse motor for moving the cloth presser mechanism in the XY direction. Furthermore, the thread trimming device constitutes thread trimming means for cutting the thread after button sewing, and is fixed to the lower part of the needle plate of the sewing machine bed and rotatably supported by the needle plate. The movable blade is mainly constituted. The movable blade can be driven by the driving force of the thread trimming solenoid.
[0005]
The button supply device is for supplying a button to the button clamp mechanism of the holding means at a delivery position where the needle center and the center of the button coincide with each other after thread trimming. The button transport device and the buttons discharged from the discharge hole of the button transport device are received one by one at the receiving position, the received button is moved from the receiving position to the transfer position, and then transferred to the holding means at the transfer position. A button transfer mechanism. The button transfer mechanism has a pair of openable and closable shutter plates on which buttons that are ejected so as to fall from the ejection holes of the button transport device are disposed, and can be expanded and contracted with respect to the center disposed above the shutter plates. A centering mechanism consisting of three claws, etc., a work attachment that can be rotated and moved up and down above the center of the centering mechanism, and a carrier pin that is inserted into the threading hole of the button are on the free end side. And a button carrier that moves the button from the receiving position to the button delivery position. The button carrier has a carrier pin position with a driving force of the button carrier drive motor, and a receiving position located at least vertically below the discharge port, and a delivery position where the needle drop position and the button center position coincide with each other. In general, it can be rotated so that it can reciprocate between them.
[0006]
According to the conventional button attaching sewing machine having such a configuration, first, the button is transported by the button transport device and discharged from the discharge hole by natural fall. The button dropped from the discharge port is placed on the opening / closing part of a pair of shutter plates arranged below the discharge port, and the three claws of the alignment mechanism are closed to bring the button to the center. After positioning, the work attachment is lowered while rotating to insert the button threading hole in alignment with the carrier pin. Thereafter, the button is transferred to the button carrier by opening the shutter plate and raising the work attachment.
[0007]
Next, by rotating the button carrier with the driving force of the button carrier drive motor, the button inserted through the carrier pin moves from the receiving position toward the transfer position, and when the button reaches the transfer position, the button is in the transfer position. It is held by the button clamp mechanism of the fabric presser mechanism that is waiting. When the button is held by the button clamp mechanism, the button carrier returns to the receiving position.
[0008]
Next, by driving the sewing machine motor, when the needle is moved up and down and the button is sewn to the sewing object by the seam, the cloth presser mechanism is moved based on a predetermined sewing pattern by the cloth feed mechanism, Needle drop is performed in a predetermined order on a plurality of threading holes formed in the button. Then, after the button sewing operation in which the sewing operation for sewing the button to the sewing product is completed, the optimum thread remaining length of the button attached to the sewing product by driving the cloth feed mechanism can be obtained (for example, FIG. 5). (B) The distance L from the thread knot formed at the final needle drop position to the blade of the fixed blade is always constant even when the center of the threading hole of the button is different. After the movement, the yarn cutting device is driven by the yarn cutting solenoid to cut the yarn.
[0009]
In addition, after thread trimming, the cloth feed mechanism is driven to move the cloth presser mechanism to a delivery position where the center of the needle coincides with the center of the button, thereby supplying a button for the next button attachment by the button supply device. It is formed so that it can be received.
[0010]
In such a conventional sewing machine for button attachment, a cycle mode and a standard mode in which the holding means is moved to the thread trimming position after button sewing to perform thread trimming and then move the holding means to the delivery position. It is common to have a high-speed mode for shortening.
[0011]
[Problems to be solved by the invention]
However, in the conventional button sewing machine described above, there is no problem in the standard mode. However, in the high-speed mode, the timing for delivering the button of the button supply device becomes faster, and the cloth feed mechanism has the cloth presser mechanism. There is a problem in that the button supply device supplies the button to the delivery position before being moved to the delivery position.
[0012]
That is, as shown in the timing chart of FIG. 10, in one standard mode, the movement necessary for the cloth feed mechanism to reach the thread trimming position from the upper position signal of the last needle of the sewing machine at the TA time on the sewing machine body side. The sewing machine which is a stop signal of the sewing machine motor after Tc time after driving the thread trimming solenoid for the thread trimming operation after the time Tb allowing for the time, and then expecting the moving time required for the cloth feed mechanism to reach the delivery position. A 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 for opening and closing the shutter plate in order to prevent the button from being caught, and the button delivery position is reached. Has moved to.
[0013]
Therefore, as shown in FIG. 10, in the standard mode, the button carrier drive motor that moves the button carrier from the receiving position to the delivery position after the cloth presser mechanism that is moved by the driving force of the feed drive motor has moved to the delivery position. As a result, the button is reliably delivered from the button carrier to the button clamp mechanism of the cloth feed mechanism.
[0014]
On the other hand, in the other high-speed mode, when the button supply device receives a sewing machine stop signal, the button carrier drive motor is operated after a minimum Td 'time of about 10 ms without opening and closing the shutter plate. The button has been moved to the delivery position.
[0015]
Therefore, as shown in FIG. 10, in the high-speed mode, the button carrier drive motor that moves the button carrier from the receiving position to the delivery position before the cloth presser mechanism that is moved by the driving force of the feed drive motor moves to the delivery position. Since the button is supplied and the button is supplied to the receiving position, the delivery of the button from the button carrier to the button clamp mechanism of the cloth feeding mechanism is not stably performed.
[0016]
Furthermore, in any mode, since the holding means is moved to the thread trimming position after button sewing and the thread trimming is performed and then the holding means is moved to the delivery position, in the high speed mode, the cloth feed mechanism Before the button moves to the delivery position, the button carrier of the button supply device may reach the delivery position and supply the button.
[0017]
The sewing machine stop signal is not output after the sewing machine motor actually stops, but is output in anticipation of the time lag until the button supply device receives the sewing machine stop signal and moves the button to the delivery position. ing.
[0018]
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 a button in the high speed mode.
[0019]
[Means for Solving the Problems]
  In order to achieve the above object, the button sewing machine according to claim 1 of the present invention is characterized in that it can hold a button and a sewing product to which the button is sewn.Includes a gripping device and a support plateHolding means and said holding means based on a predetermined sewing patternHorizontallyA button having a feeding means for moving, a thread trimming means for cutting a thread after button sewing, and a button supply means for supplying the button to the holding means at a delivery position where the needle core and the center of the button coincide after thread trimming In attaching sewing machine,The feed means includes a pair of left and right feed drive motors, and a drive plate having a base end connected to the feed drive motor and a base end of the support plate fixed to the tip.After button sewingBy the horizontal movement of the holding means,Standard mode in which the holding means is moved to the delivery position after the thread trimming is performed by moving to the thread trimming position where the optimum remaining thread length can be obtained, and the holding means is moved to the delivery position after button sewing., So that the remaining thread length is longer than the standard mode,The mode selection means for selecting one of the high-speed mode for executing thread trimming, and the standard mode and the high-speed mode are selectively switched based on the mode signal from the mode selection means, and the mode corresponding to the switched mode is supported.Including the pair of left and right feed drive motorsAnd a control unit for setting operation control. In addition, by adopting such a configuration, in the high speed mode, by performing thread trimming at the delivery position, it is possible to move the holding means to the delivery position by the feeding means after button sewing at a high speed. Therefore, the timing of moving the cloth feed mechanism 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, the delivery of the button at the delivery position in the high speed mode can be ensured.
[0020]
  In addition, the button sewing machine of the present invention according to claim 2 is characterized in that in claim 1,A thread cutting solenoid for driving the thread trimming means; a button carrier for moving a button from a receiving position to a delivery position; and a button carrier driving motor for driving the button carrier; After moving to the delivery position, the thread trimming solenoid and the button carrier drive motor are driven.In the point. And by adopting such a configuration,The button can be reliably transferred from the button carrier to the holding means in the high-speed mode.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings.
[0022]
1 to 6 show an embodiment of a button sewing machine according to the present invention.
[0023]
The button attaching sewing machine 1 of the present embodiment can automatically supply the button B, sew the button B to a sewing object such as a cloth, and then cut the thread T connected to the seam. As shown in FIG. 1, a sewing machine body 2 composed of an electronic cycle sewing machine capable of executing at least single-ring sewing, and a button supply device 3 as a button supply means disposed on the side of the sewing machine body 2, have. The sewing machine body 2 and the button supply device 3 are disposed on a sewing machine table 4 whose upper surface is substantially flat. In the buttoning sewing machine 1, the lower side shown in the lower part of FIG. 1 is an operating side OS that is opposed to perform various operations and operations when the operator executes the sewing operation. The back side BS is located on the opposite side to the operating side OS.
[0024]
The sewing machine body 2 is used to sew the button B to a sewing object (not shown). As shown in FIG. 1, the sewing machine bed 5 is attached to a predetermined position on the sewing machine table 4, and the sewing machine bed. 5 has a general frame structure having a sewing machine arm 6 extending in parallel with the sewing machine bed 5 and a pedestal 7 connecting the thin bed 5 and 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 directed in the vertical direction. As shown in FIG. 2, the needle N has a base end attached to the lower end of the needle bar 8. As is well known, the needle bar 8 is reciprocated with a predetermined stroke in the vertical direction by a needle bar drive mechanism (both not shown) interlocked with the rotation of the drive shaft that is rotationally driven by the sewing machine motor 9 (FIG. 7). It is possible. Furthermore, the sewing machine main body 2 has a feeding device 10 and a thread trimming device 11 as shown in FIG.
[0025]
As shown in detail in FIG. 3, the feeding device 10 clamps the button B and holds the cloth presser mechanism 12 as a holding means for holding the workpiece, and the cloth presser mechanism 12 according to the type of the button B. And a cloth feed mechanism 13 as a feed means for moving based on a predetermined sewing pattern to be set.
[0026]
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, a pair of left and right feed drive motors 15L and 15R each including a pulse motor in the present embodiment. have. These feed drive motors 15L and 15R have their output shafts 15La and 15Ra having their distal ends protruding above the sewing bed 5, and the output shafts 15La and 15Ra and the base end of the drive plate 14 are eccentric members. 16, and a pair of left and right driving force transmission mechanisms constituted by the eccentric shaft 17 and the link member 18. In addition, as a driving force transmission mechanism, it can select and use from the conventionally well-known various structures.
[0027]
The drive plate 14 is rotatably connected to and supported by the other end of the link member 18, and the drive plate 14 extends along the upper surface of the sewing machine bed 5 so that the front end of the drive plate 14 is located on the front side of the sewing machine bed 5. It is arrange | positioned so that it may extend. A substantially hole-shaped guide hole 19 extending in 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 slidably fitted along the longitudinal direction of the guide hole 19. That is, the drive plate 14 is rotatable about the support shaft 20 of the guide member 21 and is guided by the guide member 21 and the guide hole 19, thereby supporting the support shaft within the longitudinal range of the guide hole 19. 20 is configured to be swingable around the center.
[0028]
The cloth presser mechanism 12 includes a support plate 22 that supports the sewing product from below, and a gripping device 23 that clamps the button B and presses the sewing product. And the base end part of the support plate 22 is being fixed to the front-end | tip part of the said drive plate 14, This needle penetrates the support plate 22 in the plate | board thickness direction which can pass the needle N which moves up and down at least in a sewing state. A square hole-shaped through hole is formed.
[0029]
The gripping device 23 includes a support frame 24 that extends substantially parallel to the top of the front end of the drive plate 14 and a conventionally known button clamp that is disposed on the front end of the support frame 24 and can hold and release the button B. And a mechanism 25. The support frame 24 has a base end portion rotatably supported by 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. Further, the gripping device 23 is always urged downward by an urging force of a spring (not shown), and by this urging force, the button clamp mechanism 25 is pressed against the support plate 22 so that the workpiece can be clamped. It is like that. Further, the gripping device 23 resists the urging force by a presser lifting mechanism 29 having a presser lifting link 27 and a presser lifting lever 28 driven by a presser lifting solenoid 26 shown in FIGS. Is lifted to release the pinching of the workpiece.
[0030]
By driving the two feed drive motors 15L and 15R, the drive plate 14 moves in the front-rear direction within the longitudinal range of the guide hole 19 and swings in the left-right direction about the support shaft 20, and this drive plate 14 With the movement, the support plate 22 and the button clamp mechanism 25 also move back and forth and left and right.
[0031]
That is, the rotation direction and the amount of rotation of the two feed drive motors 15L and 15R are individually controlled, so that the support plate 22 and the button clamp mechanism 25 are moved to arbitrary positions in the horizontal plane.
[0032]
As a result, the needle N moves the button B in a predetermined order by moving the support plate 22 and the button clamp mechanism 25 according to the type and size of the button B held by the button clamp mechanism 25 and the sewing pattern. The threading hole Ba (FIG. 5) is penetrated, and a single ring seam is formed so that the button B can be sewn to the sewing product.
[0033]
The thread trimming device 11 constitutes thread trimming means for cutting the thread T (FIG. 2) after the button B is sewn. As shown in FIG. 30, a movable blade 31, and a fixed blade 32 are mainly configured. The needle plate 30 is fixed at the needle drop position of the sewing machine bed 5 so as to face the support plate 22, and has a long hole-like needle hole 33 penetrating in the plate thickness direction at substantially the center thereof. Is formed. The fixed blade 32 is fixed to the lower surface of the needle plate 30 so as to face one end in the left-right direction of the needle plate 30, and the movable blade 31 rotates around the movable blade support shaft 34 fixed to the needle plate 30. It is supported freely. Then, by rotating the movable blade 31 toward the fixed blade 32 by the thread trimming drive mechanism 35, the fixed blade 32 and the movable blade 31 cooperate to cut the thread T after sewing connected to the workpiece. Be able to.
[0034]
The thread trimming drive mechanism 35 in this embodiment includes a thread trimming lever 36, a thread trimming arm 37, and a connecting plate 38, as shown in detail in FIG. The thread trimming drive mechanism 35 can drive the movable blade 31 in conjunction with the presser lifting link 27 driven by the presser lifting solenoid 26.
[0035]
That is, the presser foot lifting solenoid 26 of this embodiment also serves as a thread trimming solenoid 39 as a drive source for driving the thread trimming device 11, and the gripping device is operated by retreating the output shaft 26 a of the presser lifting solenoid 26. 23, the presser foot lifting operation is performed to release the clamp of the sewing product, and the movable blade 31 is driven in conjunction with the presser lifting operation to cut the thread T after sewing connected to the sewing product. The thread trimming operation can be performed.
[0036]
The button supply device 3 moves the button B to the button clamp mechanism 25 of the holding means at the delivery position P2 where the needle drop position shown in FIG. As shown in FIGS. 1 and 5, the button transport mechanism 40 for aligning and transporting a large number of buttons B, the discharge port of the button transport mechanism 40, and a second discharge port 48a described later in detail. Buttons to be discharged are received one by one at the receiving position P1, and the received buttons B are moved from the receiving position P1 to the delivery position P2, and then delivered to the button clamp mechanism 25 of the holding means at the delivery position P2. And a transfer mechanism 41.
[0037]
As shown in FIG. 5, a button supply unit 42 is disposed on the right side of FIG. 5 farthest from the sewing machine body 2, and the button supply unit 42 has a button supply unit 42 on the sewing machine body 2 side. A button B outlet 42a is provided. On the left side of the button supply unit 42, a disc-shaped first rotating plate 44 that performs intermittent rotating motion every 90 degrees by the driving force of the first rotating plate driving motor 43 made of a pulse motor or the like is disposed. A first support plate 45 is disposed below the first rotating plate 44. In addition, four notches 44 a arranged at equal angles from the center position of the first rotating plate 44 at equal distances are formed on the outer peripheral portion of the first rotating plate 44. The buttons B sent out from the delivery port 42a and dropped are inserted into the notches 44a formed in the first rotating plate 44 one by one and the lower surfaces thereof are supported by the first support plate 45, and the first The button B fitted in the notch 44 a can be moved along the first horizontal arcuate path 46 by the rotation of the one rotation plate 44.
[0038]
A first discharge port 45a for discharging the button B moving on the first horizontal arcuate path 46 downward is provided at a position of the first support plate 45 on the sewing machine body 2 side. The button B that moves upward along the first horizontal arcuate path 46 is in the middle of the first horizontal arcuate path 46, specifically, when the button B moves to the sewing machine body 2 side rotated 180 degrees from the delivery port 42a. The first support plate 45 is configured to fall downward from the first discharge port 45a.
[0039]
On the left side of the first support plate 45, a driving force of the first rotary plate drive motor 43 is transmitted by a gear train or a belt (not shown) and rotates in conjunction with the first rotary plate 44. A second rotating plate 47 is disposed, and a second support plate 48 is disposed below the second rotating plate 47. In the vicinity of the outer peripheral portion of the second rotating plate 47, a plurality of, in the present embodiment, eight button insertion holes 47a arranged at equal angles from the center position of the second rotating plate 47 are formed. Yes. One button B falling from the first discharge port 45a is inserted into each button insertion hole 47a formed in the second rotating plate 47 that rotates intermittently every 45 degrees in conjunction with the first rotating plate 44. The bottom surface is inserted and supported by the second support plate 48, and the button B inserted in the button insertion hole 47 a can be moved along the second horizontal arcuate path 49 by the rotation of the second rotation plate 47. Has been. Further, a second discharge port 48 a for discharging the button B moving on the second horizontal arcuate path 49 downward is provided at a position of the second support plate 48 on the sewing machine body 2 side. The button B that moves upward along the second horizontal arcuate path 49 is in the middle of the second horizontal arcuate path 49, specifically when the button B moves to the sewing machine body 2 side rotated 180 degrees from the first discharge port 45a. The second support plate 48 is configured to fall downward from the second discharge port 48a. The position where the second discharge port 48a is disposed is the receiving position P1 of the button B by the button transfer mechanism 41. The rotation of the second rotary plate 47 may be controlled by a drive motor similar to the first rotary plate drive motor 43 provided separately from the first rotary plate drive motor 43.
[0040]
As shown in FIG. 6, the button transfer mechanism 41 includes a pair of openable and closable shutter plates 51 on which a button B discharged so as to fall from the second discharge port 48a of the button transport mechanism 40 is placed. A centering mechanism 52 comprising three claws or the like disposed above the shutter plate 51 and capable of expanding and contracting with respect to the center, and a work attachment 53 disposed so as to be rotatable and movable up and down above the center of the centering mechanism 52. The button carrier drive motor 55 (FIG. 7) comprising a pulse motor or the like is provided with the same number of carrier pins 54 as the threading hole Ba of the button B inserted into the threading hole Ba of the button B on the free end side. And a button carrier 56 that moves the button B from the receiving position P1 to the button B delivery position P2 with force. The work attachment 53 is rotatable and can be raised and lowered by the driving force of the rotation motor 57 and the lifting air cylinder 58.
[0041]
The button transfer mechanism 41 is always positioned below the second discharge port 48a with the pair of shutter plates 51 closed, and the button B falling from the second discharge port 48a is a shutter plate in the closed state. Then, the button B is held on the shutter plate 51 by the aligning mechanism 52, and the center of the button B and the center of the opening / closing portion of the shutter plate 51 are made to coincide with each other. As a result, the center of the button B coincides with the center of the carrier pin 54 of the button carrier 56 waiting under the shutter plate 51. When the center of the button B and the center of the opening / closing portion of the shutter plate 51 coincide with each other, the shutter plate 51 is opened, and the operation of the rotation motor 57 and the lifting air cylinder 58 causes the projector to wait above the second discharge port 48a. The work attachment 53 is lowered while rotating, and is rotated while pressing the button B. As a result, the threading hole Ba of the button B is inserted into the carrier pin 54 of the button carrier 56 waiting under the shutter plate 51. Here, when the threading hole Ba of the button B is inserted into the carrier pin 54 of the button carrier 56, the button B is positioned below three claws (not shown) of the aligning mechanism 52. The three claws urging toward the center are closed, and it is detected by a sensor (not shown) that the threading hole Ba of the button B is inserted into the carrier pin 54 of the button carrier 56, and the shutter plate is based on this detection signal. 51 is configured to perform the closing operation of 51 and the lifting operation of the work attachment 53. Thereafter, the button B is transferred from the receiving position P1 to the delivery position P2 by the rotation of the button carrier 56 by the driving force of the button carrier drive motor 55, and is held by the button clamp mechanism 25 at the delivery position P2. . When the button B is held by the button clamp mechanism 25, the button carrier 56 returns to the receiving position P1, and the button attachment is executed by the operation of the sewing machine body 2.
[0042]
Next, an example of the control unit will be described with reference to a block diagram shown in FIG.
[0043]
As shown in FIG. 7, the control unit 60 that controls the buttoning sewing machine 1 of the present embodiment includes at least a CPU 61 and a memory 62 formed of ROM, RAM, or the like having an appropriate capacity. The control unit 60 includes at least a sewing machine motor 9, feed drive motors 15L and 15R, a presser lifting solenoid 26, a first rotary plate drive motor 43, a button carrier drive motor 55, a rotation motor 57, a lifting air cylinder 58, An operation panel 63 and an activation pedal as a sewing start switch (not shown) are electrically connected. Further, the operation panel 63 has a dip switch 64 as mode selection 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, and input. A touch panel having keys and the like, various switches such as a sewing pattern selection switch, and various indicator lights such as LEDs are arranged. The mode selection means is not limited to the DIP switch 64, but can be selected from various switches such as a push button switch and a rotary switch. However, 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 the property is low.
[0044]
In the memory 62, an operation program for selectively switching between the standard mode and the high-speed mode based on at least a mode signal from the DIP switch 64 serving as mode selection means and setting operation control corresponding to the switched mode. Is to be memorized. As this operation program, after the button for performing the standard mode is sewn, the presser foot mechanism 12 as the holding means is moved to a thread trimming position where an optimum thread remaining length after thread trimming is obtained, and thread trimming is executed. Program for setting the operation control to move the presser foot mechanism 12 to the transfer position P2 after the operation, or the operation control to move the presser foot mechanism 12 to the transfer position P2 and execute the thread trimming after sewing the button for performing the high speed mode. An example of a program for setting The operation timing in the high speed mode will be described later.
[0045]
The memory 62 also stores a program for performing an initialization operation when the buttoning sewing machine 1 is turned on, and various data and programs necessary for a sewing operation.
[0046]
Since other configurations are the same as those of the conventionally known button-attaching sewing machine 1, detailed description thereof is omitted.
[0047]
Next, the operation of the present embodiment having the above-described configuration will be described.
[0048]
Since the buttoning operation in the standard mode in the buttoning sewing machine 1 of the present embodiment is the same as the conventional one, the detailed description thereof will be omitted, and only the part related to the gist of the present invention will be described.
[0049]
First, the operation up to the start of sewing by the buttoning sewing machine 1 of this embodiment will be described with reference to the flowchart shown in FIG.
[0050]
As shown in the flowchart of FIG. 8, the operation up to the start of sewing by the buttoning sewing machine 1 of the present embodiment is determined in step ST01 by determining whether a sewing preparation completion switch (not shown) has been turned on. If not, the process waits until the determination in step ST01 is turned on.
[0051]
If it is determined in step ST01 that the ON operation is performed, the process proceeds to step ST02. In step ST02, it is determined whether or not the dip switch 64 is in the standard mode. If the standard mode is selected, the process proceeds to the next step ST03. Then, the mode is switched to the standard mode, and based on the program for controlling the operation of the standard mode stored in the memory 62, the operation control of each part is performed in the standard mode, more specifically, the presser foot mechanism as a holding means after button sewing. After performing thread trimming by moving 12 to the thread trimming position, setting is made so as to correspond to the operation of moving the cloth presser mechanism 12 to the delivery position P2, and the process proceeds to the next step ST05.
[0052]
If the high-speed mode is determined in step ST02, the process proceeds to the next step ST04 where the mode is switched to the high-speed mode and the operation of the high-speed mode stored in the memory 62 is controlled. The operation control is set so as to correspond to the operation for executing the thread trimming by moving the cloth presser mechanism 12 to the delivery position P2 after the button is sewn, and proceeding to the next step ST05.
[0053]
Next, in step ST05, it is determined whether or not a sewing start switch (not shown) has been turned ON. If not, the process waits until the determination in step ST05 is turned ON.
[0054]
If it is determined in step ST05 that the ON operation has been performed, the process proceeds to the next step ST06, where a series of operations of sewing, specifically button attachment, thread trimming, and button supply are executed and the process ends.
[0055]
Next, the operation timing in the high speed mode by the buttoning sewing machine 1 of this embodiment will be described with reference to the timing chart shown in FIG.
[0056]
As shown in the timing chart of FIG. 9, in the high-speed mode of the button attaching sewing machine of this embodiment, the cloth feed mechanism 13 receives the transfer position from the upper position signal of the last needle of the sewing machine at the TA time on the sewing machine body 2 side. A sewing machine stop signal, which is a stop signal for the thread trimming solenoid 39 and the sewing machine motor 9, is output to the button supply device 3 for a thread trimming operation after a time Tb in which the travel time required to reach P2 is expected. On the button supply device 3 side, when the sewing machine stop signal is received, the button carrier driving motor 55 is operated after a minimum Td ′ time of about 10 ms without performing the opening / closing operation of the shutter plate 51 to deliver the button P2 Has moved to.
[0057]
That is, in this embodiment, the button carrier drive motor 55 is driven after Tb + Td ′ time from the position signal of the last needle of the sewing machine at the TA time, whereas conventionally, the upper position of the sewing machine at the TA time is The button carrier drive motor is driven after time Tb + Tc + Td ′ from the position signal.
[0058]
Further, as shown in FIG. 9, in the high-speed mode of the buttoning sewing machine 1 of the present embodiment, after the cloth presser mechanism 12 that is moved by the driving force of the feed drive motors 15L and 15R has moved to the delivery position P2, Since the thread cutting solenoid 39 for driving the cutting device 11 and the button carrier driving motor 55 for moving the button carrier 56 from the receiving position P1 to the delivery position P2 are driven, the button carrier 56 to the button clamping mechanism 25 of the cloth feeding mechanism 13 is driven. The delivery of the button B is surely performed.
[0059]
Therefore, according to the high-speed mode of the buttoning sewing machine 1 of the present embodiment, as shown in FIG. 9, after the presser foot mechanism 12 that is moved by the driving force of the feed drive motors 15L and 15R has moved to the delivery position P2. Since the button carrier 56 moves from the receiving position P1 to the delivery position P2, the delivery of the button B from the button carrier 56 to the button clamp mechanism 25 of the cloth feed mechanism 13 is reliably performed.
[0060]
Thus, according to the button attaching 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 selection means, By performing thread trimming at the delivery position P2 in the mode, the cloth presser mechanism 12 as the holding means by the cloth feed mechanism 13 as the feed means after the button sewing can be moved to the delivery position P2 at high speed. Therefore, the timing for moving the cloth feed mechanism 13 to the delivery position P2 can be surely made in time for the supply timing of the button B by the button supply device 3 as the button supply means at the delivery position P2. As a result, the delivery of the button B at the delivery position P2 in the high speed mode, specifically delivery of the button B from the button carrier 56 to the button clamp mechanism 25 can be ensured.
[0061]
When the thread is trimmed at the delivery position P2, the remaining thread length after the thread trimming is longer than when the thread is trimmed at the thread trimming position.
[0062]
Further, according to the button attaching sewing machine 1 of the present embodiment, since the mode selection means is formed by the dip switch 64, there is a risk of malfunction due to careless operation by the operator or erroneous operation due to contact by the operator. Can be reduced.
[0063]
In addition, this invention is not limited to the said embodiment, A various change can be made as needed.
[0064]
【The invention's effect】
As described above, according to the button attaching sewing machine of the present invention according to the first aspect, it is possible to obtain extremely excellent effects such as reliable delivery of the button at the delivery position in the high speed mode.
[0065]
  According to the button sewing machine of the present invention according to claim 2,The button can be reliably transferred from the button carrier to the holding means in the high-speed mode.There are extremely excellent effects such as.
[Brief description of the drawings]
FIG. 1 is an external perspective view showing the main 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 the main part of the sewing machine main body of FIG.
3 is an external perspective view of a main part of the cloth presser device and the cloth feed device of the sewing machine body in FIG. 2;
4 is a perspective view of a main part of a thread trimming device and a thread trimming drive mechanism of the sewing machine main body of FIG.
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 buttoning sewing machine according to the present invention.
FIG. 8 is a flowchart showing the operation of the main part of the button attaching sewing machine according to the present invention before the start of sewing.
FIG. 9 is a timing chart showing the operation timing in the high-speed mode of the buttoning sewing machine according to the present invention.
FIG. 10 is a timing chart showing operation timings in a standard mode and a high-speed mode of a conventional button-attached sewing machine.
[Explanation of symbols]
1 Sewing machine for buttons
2 Sewing machine
3 Button supply device
9 Sewing machine motor
10 Feeder
11 Thread trimmer
12 Work clamp mechanism (holding means)
13 Cloth feed mechanism (feed means)
15L, 15R feed drive motor
23 Grasp device
25 Button clamp mechanism
26 Presser lift solenoid
29 Presser foot lifting mechanism
30 needle plate
31 Movable blade
32 Fixed blade
35 Thread trimming drive mechanism
39 Thread trimming 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 unit
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

Claims (2)

A holding means comprising a gripping device and a support plate capable of holding a button and a workpiece to be sewn to the button;
Feeding means for moving the holding means in a horizontal direction based on a predetermined sewing pattern;
Thread trimming means for cutting the thread after button sewing,
In a button attaching sewing machine having button supply means for supplying the button to the holding means at a delivery position where the needle center and the center of the button coincide after thread trimming,
The feed means includes a pair of left and right feed drive motors, and a drive plate having a base end connected to the feed drive motor and a base end of the support plate fixed to the tip.
A standard mode in which after the button sewing, the holding means is moved to the thread trimming position where the optimum thread remaining length is obtained by moving in the horizontal direction, and then the holding means is moved to the delivery position after the thread trimming is performed; After the button sewing, the holding means is moved to the delivery position, and mode selection means for selecting any one of the high-speed mode for executing thread trimming so that the thread remaining length becomes longer than the standard mode ;
A control unit configured to selectively switch between a standard mode and a high-speed mode based on a mode signal from the mode selection means, and to set operation control including the pair of left and right feed drive motors corresponding to the switched mode. A sewing machine for buttons. A thread trimming solenoid for driving the thread trimming means;
A button carrier for moving the button from the receiving position to the delivery position;
A button carrier driving motor for driving the button carrier;
The button attaching sewing machine according to claim 1, wherein the controller drives the thread trimming solenoid and the button carrier drive motor after moving the holding means to the delivery position in the high speed mode .

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