JPS5953068B2 - Cycle sewing machine drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to cycle sewing machines such as button sewing machines, bar-lock sewing machines, pattern bar-lock sewing machines, and the like.

Conventionally, when sewing a four-hole button B on a workpiece fabric, as shown in Fig. 1, on a commonly used button sewing machine, one group is first sewn between holes 1 in the upper row in the - cycle. After forming stitches and cutting threads, some machines form similar group stitches between holes 2 in the lower row and cutting threads in the next cycle.

As a method for successively forming two group stitches, a certain reference time is set in advance which is slightly longer than the time required for a cycle (the period for forming the group stitches between holes 1 in the upper row). By comparison with the reference time, at the end of the first cycle, the next cycle is started based on the determination that the end time of that cycle is within the reference time, and the end of the next cycle is determined to be within the reference time. Sometimes, based on a determination that the end time of the cycle was longer than the reference time, the start of the third cycle was stopped and four-hole buttoning was completed.

In addition, when sewing a two-hole button B as shown in Fig. 2 on a workpiece cloth, set a reference time shorter than the time required for the -cycle, thereby reducing the time required for the -cycle. Based on the determination that the time is longer than the reference time, the second and subsequent drives are prevented, and the sewing machine is driven only in -cycles so as to form one group stitch in the gap 3.

Then, as a method of not causing the sewing machine to cycle after forming only one group of stitches, the volume of the reference setting pulse generating means is adjusted, and as opposed to the four-hole button sewing, A pulse having a pulse width slightly shorter than the time required to form a group stitch between holes 3 is generated so that the same pulse has already disappeared when the group stitch between holes 3 is completed.

Then, as in the case of the four-hole button B, the sewing machine is cycled again after forming the group stitches between holes 3 in the same state as when forming the group stitches between holes 2 in the lower row. I was trying not to let it run.

However, when the number of stitches required to form a group stitch between holes 1 and 2 of a four-hole button B is changed from, for example, 8 stitches to 16 stitches (the number of stitches required to form one group stitch is When the required time is doubled), when the hole gap 1 in the upper row finishes forming a group stitch of 16 stitches, the reference time for setting the countersunk rotation drive has already elapsed. The driving of the sewing machine stops after the stitches are formed, and the next group stitches between the holes 2 in the lower row are not formed.

In addition, for the two-hole button B, the number of stitches required to form the group stitches between holes 3 was set to 16 stitches, and the reference time was correspondingly set to be slightly shorter than the time required to sew 16 stitches. In this case, when changing from 16 stitches to 8 stitches in the middle of forming a group stitch, the sewing machine cycles again because the hole gap 3 in the upper row is still within the standard time even after forming a group stitch of 8 stitches. It will start driving.

This has made it virtually impossible to attach four-hole and two-hole buttons.

Furthermore, in order to prevent these defects, the volume for setting the reference time must be adjusted every time the number of stitches is changed, and this operation is extremely complicated.

Therefore, in view of such conventional circumstances, the present invention provides a drive device for a cycle sewing machine that can start the countersunk rotation when sewing a four-hole button, for example, without being affected by changes in counting. It is something.

A further object of the present invention is to provide a cycle sewing machine that can be started once when sewing a four-hole button and once when sewing a two-hole button without being affected by changes in count. This is what we provide.

Hereinafter, an embodiment of a sewing machine with a button that embodies the present invention will be described based on the drawings. Reference numeral 11 denotes a main shaft 1 disposed in the frame of a sewing machine with a button (hereinafter referred to as sewing machine) M.
2, the device can be freely rotated and moved in the axial direction!
- It is also a pulley, and is connected to a sewing machine drive motor (not shown) via a belt 13 that is hung around the pulley 11.

14 is the main shaft 12 arranged in parallel with the pulley 11;
A control disk 1 is fixed to the control disk 1, and a locking portion 15 having a step is formed on the circumferential surface of the control disk 1.
4 and the pulley 11 is provided with a clutch mechanism.

Reference numeral 16 denotes a control lever fixed to a support shaft 17 that is rotatably disposed within the machine frame so as to extend parallel to the main shaft 12, and has a pair of bearings 16a at its upper part and a control lever at its lower base end. A locking protrusion 16b is formed protrudingly.

Reference numeral 18 denotes a locking shaft that passes through the bearing portion 16a of the control lever 16, and a locking piece 19 that slides on the peripheral surface of the control disk 14 is provided at the left end of the locking shaft.
The locking shaft 18 is always biased to the left by a spring 20 interposed between the bearing portions 16a.

A spring 21 has one end fixed to the control lever 16 and the other end fixed to the machine frame of the sewing machine M, and is biased to rotate the control lever 16 counterclockwise so that the control disk 14 is always The locking piece 19 is pressed against the circumferential surface of the holder.

Reference numeral 22 denotes an electromagnetic solenoid disposed on the machine frame of the sewing machine M so that its plunger 23 comes into contact with the locking protrusion 16b of the control lever 16.
When the plunger 23 is excited based on an output signal from an electric circuit controlled by operating a manual switch such as a pedal P (to be described later), the plunger 23 projects to the left and supports the control lever 16 against the spring 21. It is rotated clockwise together with the shaft 17.

Reference numeral 24 denotes a pressing lever fixed to one end of the support shaft 17, which rotates as the support shaft 17 rotates counterclockwise in FIG. 14 in the axial direction.

The pulley 11 is then connected to the clutch mechanism from the disengaged state to rotate the main shaft 12.

Therefore, in the demagnetized state of the solenoid 22, even though the Boo'J-11 is being rotated by the sewing machine drive motor, the locking piece 19 is attached to the locking portion 15 of the control disk 14 fixed to the main shaft 12. 1 system is connected, and the pulley 11 and clutch mechanism are separated, so that the shaft 12 does not rotate and the needle 25 (described later) is stopped at the top dead center. However, when the electromagnetic solenoid 22 is energized, the control lever 16 The locking portion 15 and locking piece 19 of the disc 14 are rotated clockwise.
is disengaged, and the pulley 11 is connected to the clutch mechanism, causing the pulley 11 to rotate the main shaft 12.

Reference numeral 25 denotes a needle that reciprocates up and down once per rotation of the main shaft 12, and a looper 26 built in the base part Mb of the sewing machine M.
In cooperation with this, a single thread chain stitch opening is formed.

Reference numeral 27 denotes a feed plate that slides on the upper surface of the base portion Mb, and has a feed plate 28 attached to its tip, and includes a vertical feed mechanism (not shown) and a horizontal feed mechanism (not shown) provided within the machine frame. (not shown) allows movement in the longitudinal direction X and reciprocating movement in the lateral force direction Y.

Reference numeral 29 denotes a button grip holder whose base end is rotatably mounted on the feed base 27 by a shaft 30, and the tip has a grip arm 32 for gripping the button B via a button grip set 31. It is installed.

The gripping arm 31 makes similar movements in accordance with the movements of the feed table 27 in the vertical and lateral directions X and Y.

Reference numeral 33 denotes an inverted-shaped power transmission rod erected from the upper surface of the button grip holder 29, and 34 is a pressing rod also erected from the upper surface base of the holder 29, which causes the grip arm 32 to be pressed against the feed plate 28 by a spring 35. That's what I do.

As shown in FIG. 4, 36 is an eccentric cam fixed to the main shaft 12, and is in sliding contact with a bifurcated portion 38a of a swinging body 38 fixed to a shaft 37 supported on the machine frame of the sewing machine M.

By its rotation, the eccentric cam 36 rotates the rocking body 38 about the shaft 37, thereby causing the two-pronged portion 3 of the rocking body 38 to rotate.
An actuating piece 38b, which is formed by extending horizontally from one outside of 8H and bending its tip at a right angle, is reciprocated approximately in the vertical direction.

Reference numeral 40 denotes a motion axis disposed in parallel between the main shaft 12 and the support shaft 17, and in this embodiment, the movement axis 40
It is designed to rotate.

Reference numeral 41 denotes a cam fixed to the movement shaft 40, and a recess 4 is formed on the outer peripheral surface of the cam at a position facing the movement shaft 40.
1a and 41b are formed.

42 is a recess 411 in the side wall of the cam 41.
An arc-shaped sliding hole 43 bored to extend toward 0 is rotatably attached to the side wall of the cam 41 with a shaft 44, and a sliding pin 45 provided at the other end is inserted through the sliding hole 42. The recess 41b is closed or opened by being rotated around the shaft 44.

Reference numeral 46 denotes an operating lever fixed to the support shaft 17, and a roller 47 for pressing against the outer peripheral surface of the cam 41 is rotatably attached to the tip of the operating lever.

When the control lever 16 is rotated by the excitation of the electromagnetic solenoid 22, this roller 47 moves into the recessed portion of the cam 41 as the operating lever 46 rotates counterclockwise.
1a, slides into contact with the outer peripheral surface of the cam 41, and the cam 41
When the main shaft 12 makes a half turn (the main shaft 12 has made eight turns), the main shaft 12 fits into a recess 41b formed at a position opposite to the recess 41a.

Also, at this time, the disk 14 adjusts its relative position so that the locking piece 19 attached to the control lever 16 engages with the locking portion 15 of the control disk 14 fixed to the main shaft 12 with a slight delay. has been done.

Reference numeral 48 denotes a connecting rod that is fixed to the support shaft 17 so as to be substantially perpendicular to the operating lever 46 at one end, and a connecting link 49 is pivotally connected to the other end so as to be approximately perpendicular to the operating lever 46 .

Therefore, the roller 47 attached to the tip of the operating lever 46
When the connecting link 49 leaves the recesses 41a and 41b, the connecting link 49 moves to the right in FIG.
, 41b, it moves to the left and returns to its original position.

Reference numeral 50 denotes a connecting rod whose lower end is pivotally connected to the right end of the link 49, and as shown in FIG.
When the connecting link 49 is in the left position, it engages with the operating piece 38b of the rocking body 38, and when the connecting link 49 moves to the right, the engagement is released.

The relative positional relationship between the connecting rod 50 and the swinging body 38 is such that the rollers 47 fit into the recesses 41a and 41b, and the actuating piece 38
When b engages with the engagement groove 51 of the connecting rod 50, the actuating piece 38b
The sliding contact position between the eccentric cam 36 fixed to the main shaft 12 and the swinging body 38 is adjusted so that the connecting rod 50 is pushed down and stopped.

Reference numeral 52 denotes a swing link rotatably supported by a fixed shaft 53 of the arm Ma of the sewing machine M, one end of which is pivotally connected to the upper end of the connecting rod 50 via a shaft 54, and the other end of which is connected to the button. An L-shaped launching rod 55 that engages with a transmission rod 33 erected on the grip holder 29 is provided vertically.

Therefore, when the connecting rod 50 is pushed down by the operating piece 38b of the swinging body 38, the swinging link 52 rotates counterclockwise in FIG. Lift from the dashed line position to the solid line position.

Reference numeral 56 denotes a pressing member attached to the connecting rod 50 of the swinging link 52, which allows the swinging link 52 to rotate the lever of the operating microswitch MSI provided on the arm part counterclockwise in FIG. It is designed to be pressed when it moves.

Reference numeral 57 denotes a connecting link whose one end is similarly pivotally connected to the pivot shaft 54 between the connecting rod 50 and the swing link 52, and whose other end is pivotally connected to a support piece 58 fixed to the arm part Ma of the sewing machine M. It is pivotally connected to the upper end of the L-shaped rotation link 59 by a shaft 60.

Reference numeral 61 denotes an operating link whose one end is rotatably connected to the lower end of the rotary link 59, and its tip is connected to the needle hole 6 provided in the throat plate (not shown) on the lower surface of the throat plate (not shown) of the base portion Mb.
It is connected to a movable blade 63 rotatably supported near 2.

Therefore, when the connecting rod 50 is lowered, the rotating link 59,
The movable blade 63 is connected to the needle 2 via a transmission mechanism such as the operating link 61.
The right armpit of the needle thread loop that has been rotated to cross the path of the needle 25 and captured by the looper 26 is connected to a fixed blade (not shown) placed at an opposing position across the path of the needle 25. Disconnect through collaboration.

64 is a mounting frame attached to the outside of the arm part Ma,
An electromagnetic solenoid 65 is excited via an electric circuit described below based on the opening/closing operation of the operating microswitch MSI.
Built-in.

When the solenoid 65 is energized, the plunger 66 is attracted upward against a spring 67.

68 is an operating rod having one end pivotally connected to the lower end of the plunger 66 with a shaft pin 69, and the other end is connected to the arm portion M.
The wiper 72 is rotatably connected to one end of a wiper 72 which is rotatably supported by a screw 71 on a support 70 fixed to the side wall of the distal end of the wiper 70a.

Therefore, when the pressing member 56 attached to the swing link 52 presses the operating microswitch MSI, and the electromagnetic solenoid 65 is excited by an electric circuit to be described later, and the plunger 66 is attracted upward, the operating rod 68 is (At iL, the wiper 72 rotates around the screw 71 from the solid line position shown in FIG. This wiper 72
Pull it out from the top side onto the processed cloth.

As shown in FIG. 7, 73 is an L-shaped board attached to the lower back of the arm Ma of the sewing machine M, and as shown in FIG. drilled,
The inside of the arm part Ma of the sewing machine M is viewed.

75 is a groove carved in the upper left end of the elongated hole 74 in FIG. 9, and 76 is a group of grooves formed in large numbers at regular intervals from the groove 75, with the grooves being equally spaced. There is.

Reference numeral 77 denotes a vertical feed adjustment lever that passes through the elongated hole 74 and slides inside the elongated hole 74, and a locking protrusion 77a protruding from the upper side thereof is inserted into the groove 75 or the groove group 76. It is supported by being engaged with a desired groove.

By operating this vertical feed adjustment lever 77, the vertical feed mechanism that causes the feed table 27, the pinch arm 32, etc. to perform a vertical feed operation is controlled, and the amount of vertical feed is adjusted. .

In this embodiment, when the vertical feed adjustment lever 77 is engaged and supported by the groove 75 at the end, the feed amount is zero, and when it is engaged and supported by a desired groove of the groove group 76, the feed amount is constant. The vertical feed mechanism is operated and controlled so that the amount is generated on the feed table 27 and the gripping arm 32.

The feed amount is also adjusted by the adjustment lever 77 in FIG.
It becomes larger as it is engaged with the groove on the left side.

MS2 is a switching microswitch fixed to the side surface of the arm portion Ma side of the board 73, and when the vertical feed adjustment lever 77 is moved to a position where it engages with the groove 75 where the feed amount is zero, The lower surface of the vertical feed adjustment lever 77 pushes the lever of the same microswitch MS2, while the groove group 7
When the microswitch MS2 is moved to a position where it engages with the microswitch MS2, the pressure on the lever of the microswitch MS2 is released and the opening/closing operation is performed.

The opening/closing state of this microswitch MS2 electrically controls the driving of the vertical feed mechanism for attaching buttons of the sewing machine M in the case of a two-hole or four-hole button, which will be described later.

Reference numeral 78 denotes an indicator plate adhered to the upper surface of the substrate 73 bent in the shape of a cursor, and indicates which groove of the groove 75 or group of grooves 76 formed in the elongated hole 74 the vertical feed adjustment lever 77 engages with. It is possible to display what is being done.

Reference numeral 79 is an indicator with a picture of a two-hole button B written on the instruction plate 78, and the vertical feed adjustment lever 77 is aligned with the groove 75.
It is designed to display that it is engaged.

Reference numeral 80 is an indicator with a picture of the four-hole button B, and when sewing the four-hole button B, the adjustment lever 7
The sliding direction of 7 is indicated, and the vertical feed amount is displayed as a numerical value of 81.

Next, the mechanical operation of the sewing machine M configured as described above will be explained.

First, to explain the case of sewing the two-hole button B onto the workpiece cloth K, move the vertical feed adjustment lever 77 to the index 7.
Set it so that it is in position 9.

Then, the drive motor of sewing machine M is driven to Boo'J-1.
1 is rotated freely, operate a manual switch such as the pedal P, energize the electromagnetic solenoid 22, disengage the locking piece 19 from the locking portion 15 of the control disk 14, and rotate the main shaft 1.
Rotate 2.

At this time, the support shaft 17 also rotates due to the rotation of the control lever 16, causing the operating lever 46 to rotate counterclockwise in FIG. 4.

Then, the roller 47 separates from the recess 41a of the cam 41,
The rotating cam 41 freely rotates while pressing the surface thereof, and the connecting link 49 is moved to the right in FIG. is solved and moves upward.

Along with this upward movement of the connecting rod 50, the gripping arm 32 that grips the two-hole button B descends to the upper surface of the work cloth placed on the feed plate 28 in advance and presses it, and at the same time, moves the movable blade 63. The operating microswitch MSI is rotated back to its original position, and the lever of the operating microswitch MSI, which was pressed by the pressing member 56 attached to the swing link 52, is released.

Then, the engagement of the locking piece 19 is released and the rotating main shaft 12 causes the needle 25 to reciprocate, and also operates the lateral feed mechanism to move the gripping arm 32 and the feed plate 28 to the workpiece cloth K.
Then, the two-hole button B is held and reciprocated in the lateral direction X, and sewing between the holes 3 of the two-hole button B is started.

When the needle 25 makes eight reciprocations (the main shaft 12 rotates eight times and the cam 41 rotates half a turn), the roller 47 fits into the recess 41b and returns to the original left position.
b and is pushed downward.

Immediately after being pushed down, the locking piece 9 fitted into the recess 41b and rotated counterclockwise in FIG. 3 engages with the locking portion 15 of the disk 14, causing the main shaft 12 to rotate. , the needle 25 is stopped at the top dead center, and button attachment is completed.

On the other hand, the connecting rod 50 pushed down rotates the movable blade 63 to cut the thread, and also moves the swinging link 52 to the fourth
In the figure, the knob arm 32 is rotated counterclockwise to move the knob arm 32 upward and press the lever of the operating microswitch MSI.

An electromagnetic solenoid 6 whose operation is electrically controlled based on the pressing of the lever of this operating microswitch MSI
5 is energized for a certain period of time, the wiper 72 is rotated back and forth, and the yarn cut by the movable blade 63 is pulled out to the upper surface of the workpiece cloth to complete button attachment of the two-hole button B. Prepare for attaching the two-hole button B.

Next, the case of attaching the four-hole button B to the work cloth K will be described. First, the vertical feed adjustment lever 77 is slid toward the index 80 side and set to the desired numerical value 81.

Then, the drive motor of the sewing machine M is driven to pulley 11.
From the state of free rotation, operate a manual switch such as the pedal P to excite the electromagnetic solenoid 22, disengage the locking piece 19 from the locking part 15 of the control disk 14, and rotate the main shaft 12. Then, sew between the holes 1 in the upper row of button B with two holes in the same manner as the button B with two holes.

Then, when the stitching between the holes in the upper row is completed, the movable blade 63 cuts the thread in the same way as the two-hole button, and
The grip arm 32 moves upward, the wiper 72 rotates back and forth, and the main shaft 12 temporarily stops.

Next, the electromagnetic solenoid 22 is energized by the vertical feed adjustment lever 77 in an electric circuit to be described later that operates based on the output of the switching microswitch MS2, which is controlled to open and close, without having to operate a manual switch such as the pedal P again. be done.

On the other hand, the vertical feed mechanism is also operated by the vertical feed adjustment lever 77, and the feed plate 28 and the grip arm 32 are moved in the vertical direction so that the holes 2 in the lower row of the four-hole button B move to the drop point of the needle 25. Move to Y.

Then, the main shaft 12 starts rotating again by the excitation of the electromagnetic solenoid 22, and the sewing operation is performed in the same manner as the sewing operation of the upper row, and button attachment is completed, and the movable blade 6
3 cuts the thread, the grip arm 32 moves upward, and the wiper 72 rotates back and forth to draw out the thread to the top of the work cloth, completing all button attachment for the four-hole button B. , the process ends in preparation for attaching the next four-hole button B.

In the above embodiment, the roller 47 attached to the operating lever 46 was fitted into the two recesses 41a and 41b so that the number of button stitches was 8, but the cam 41
The number of stitches can be increased to 16 by rotating the rotary plate 43 attached to the recess 41a to close one recess 41b so that the roller 47 can only fit into the recess 41a.

The rotation of the rotating plate 43 is connected to an operating member that can appropriately select between 8 stitches and 16 stitches, and
It may be made to interlock with the vertical feed adjustment lever 77.

Next, the electrical circuit that controls the operation of the sewing machine M will be explained based on FIGS. 11 and 12. MS3 is a micro switch for starting a non-contact switch that opens and closes when the pedal P is depressed. It is composed of an element 90 and a magnet 91.

By depressing the pedal P, a bi-level output is produced, and by releasing the pedal P, a low-level output is produced.

In addition, in this embodiment, the actuation microswitch MS 1
, a switching microswitch MS2, each of which is composed of a Hall element 90 and a magnet 91.

The operating microswitch MSI is at a low level when pressed by the pressing member 56 (when the sewing drive of the sewing machine is stopped) and is at a low level when the pressing member 56 is released (when the sewing machine is stopped).
When the sewing machine M is being driven to sew, the switching microswitch MS2 outputs a bi-level output and is pressed by the vertical feed adjustment lever 77 (when sewing a two-hole button B without vertical feed). It is designed to output a low level (when pressing is released) and a bi-level output (when sewing a four-hole button B with vertical feed).

FF turns the output of the startup microswitch MS3 to NO.
T circuit 92 This is a flip-flop that is input to its set side input terminal via the NAND circuit 93.
When a low level output is input from the circuit 93, the output on the set side is inverted from low level to bi level.

Reference numeral 94 denotes a NAND circuit whose input terminal is connected to the set-side output terminal of the flip-flop FF, and its output is used for switching to excite the electromagnetic solenoid 22 for rotating the control lever 16 via a NOT circuit 95. It is input to the base terminal of the transistor Tr1.

This transistor Tr1 is connected to the NAND circuit 9.
4 outputs a low level output, a high level input is input to the base terminal via the NOT circuit 95 to establish continuity and excite the electromagnetic solenoid 22.

96 is a NOT circuit which inputs the output of the operating microswitch MSI, and its output is input to the NAND circuit 94 via contact a.

97 connects the input terminal to the NOT circuit 9 via the contact a.
As shown in FIG. 12, the output is a delay circuit connected to 6 in FIG.
In this example, the output is set to fall from high level to low level (in this example, the time is set to be 30 to 100 m5eC), and when the input falls from high level to low level, the output immediately changes from low level to high level. The circuit is configured to stand up to the level.

The output is connected to the NA which inputs the output of the starting microswitch MS3 via the contact and NOT circuit 98.
It is input to the ND circuit 93.

99 inputs the output of N0T96 via the contact a,
It is also a NAND circuit that inputs the output of the delay circuit 97, and the output is input to the flip-flop and also excites the electromagnetic solenoid 65 for rotating the wiper 72 via the NOT circuit 100. It is connected to the base terminal of the switching transistor Tr2.

Therefore, this transistor Tr2 is connected to the NAND circuit 9.
When a high level input is input to the base terminal via the NOT circuit 100 based on the low level output from the terminal 9, conduction occurs, the electromagnetic solenoid 65 is energized, and the wiper 72 is rotated.

101 is a NOT circuit that inputs the output of the switching microswitch MS2, 102 is a NAND circuit that inputs the output of the NOT circuit 101, and the other input terminal receives the output of the NAND circuit 99 through contact C. and no.
The signal is input through the T circuit 103, and its output is input to the reset side input terminal of the flip-flop FF.

104 connects the output of the NOT circuit 101 to the NOT circuit 10
5, and its output is also input to the reset side input terminal of the flip-flop.

Reference numeral 106 denotes a delay circuit which receives the output of the NAND circuit 99, and its output is kept constant by inputting an input from a low level to a high level (see FIG. 12C) to its input terminal, as shown in FIG. 12d. After time T2 (200 in this example)
The circuit is configured so that when the input falls from a high level to a low level in a time period of 100 msec), and when the input falls from a high level to a low level, it immediately rises from a low level to a high level. There is.

107 is a NAND circuit that receives the outputs of the delay circuit 106, the NAND circuit 99, and the NAND circuit 94 that receives the outputs of the flip-flop FF, and its output is sent to the NAND circuit 104 via the NOT circuit 108. I am typing.

109 is a reset circuit connected to the reset input terminal of the flip-flop FF.

Next, the operation of the electrical circuit configured as described above will be explained.

First, to explain the case of sewing the two-hole button B, the switching micro switch MS2 is pressed by sliding the vertical feed adjustment lever 77 toward the index 79, and the operating micro switch MSI is pressed to the low level. is pressed by the pressing member 56 and is at a low level, the starting switch MS3 is at a high level because the pedal P is not depressed, and the flip-flop FF is in a reset state.

Therefore, due to the output of the switching micro switch MS2, N
A high level is input to the input terminal of the AND circuit 102, and a low level is input to the input terminal of the NAND circuit 104.

On the other hand, each N
A high level input is input to the input terminals of the AND circuits 94 and 99.

Further, since the output of the delay circuit 97 is at a low level, the high level output of the NAND circuit 99 is connected to the NAND circuit 99.
Input to the ND circuit 94 and the NAND circuit 1
A low level is input to the input terminal of 02.

Further, the other input terminal of the NAND circuit 93 receives a bi-level input from the delay circuit 97.

When the pedal P for the button type is pressed to start, the output of the starting microswitch MS3 becomes low level, and the output of the NAND circuit 93 is changed from the by level to the low level, and the set side output of the next stage flip-flop FF is activated. Invert to bi level.

As a result, the output of the next-stage NAND circuit 94 becomes low level, and the output of the switching
~ Makes the transistor Tr1 conductive and the electromagnetic solenoid 22
is excited to rotate the control lever 16 and rotate the support shaft 17.
and rotate the main shaft 12.

Then, the swing link 52 rotates, and the operating microswitch MSI changes from low level to bilevel, so that a low level is input to the NAND circuit 94.

Therefore, the switching transistor Tr1 becomes non-conductive and the electromagnetic solenoid 22 is demagnetized.

At this time, the electromagnetic solenoid 22 is demagnetized, but since the roller 47 attached to the operating lever 46 has already separated from the recess 41a and is freely rotating on the surface of the cam 41, the control lever 16 does not move until the roller 47 moves next. It is held in the rotated position until it is fitted into the fourth part 41b.

Therefore, the main shaft 12 continues to rotate.

Further, when a low level input is input to the input terminal, the output of the delay circuit 97 immediately becomes a bi level state and is input to the NAND circuit 99 at the next stage.

However, since the output of this NAND circuit 99 inputs a low level to the other input terminal, it maintains a bi-level state, and at this point it is not possible to conduct the switching transistor Tr2 via the NOT circuit 100. do not have.

When button attachment is completed by the cooperation of the needle 25, looper 26, feed plate 28, and knob arm 32, the cam 4
1 rotates half a turn, and the roller 47 on the operating lever 46 moves into the recess 41.
b, and the output of the operating microswitch MSI changes from low level to bilevel.

As a result, one input terminal of the NAND circuit 99 receives a bi-level input, but the other input terminal receives a bi-level input.
Even if the output from the delay circuit 97 enters its input terminal only at a high level, it does not immediately become a low level;
Since the bilevel is maintained until one hour later and the bilevel is manually operated, the output of the NAND circuit 99 outputs a low level output.

Then, based on this low level output, the switching transistor Tr2 is made conductive, and the electromagnetic solenoid 65
is excited for a time T1 and the wiper 72 is rotated to draw out the yarn cut by the movable blade 63 onto the upper surface of the work cloth.

On the other hand, the output of this NAND circuit 99 is input to the NAND circuit 102 as a bi-level input via the contact C1N0T circuit 103.

As a result, the NAND circuit 02 inputs a low level output to the reset 1 side input terminal of the flip-flop FF in the next stage, thereby setting the same flip-flop in the set state.

Then, the actuation microswitch MSI changes from the by level to the low level, and after a time T1, the delay circuit 97
becomes low level, and the output of the NAND circuit 99 is made bi-level, so that the switching transistor Tr
2 becomes non-conductive and the electromagnetic solenoid 65 is demagnetized.

Note that the bi-level output of this NAND circuit 99 is
Since the ND circuit 94 is already in the state of flip-flop set by hand, the button attachment of the two-hole button B is completed without making the switching transistor Tr1 conductive, and each circuit is activated at the start. The button returns to the previous state and prepares for the next button attachment.

Next, to explain the case of sewing the four-hole button B, the vertical feed adjustment lever 77 is slid toward the index 80 side and set to the desired value 8], and the switching micro switch MS2 is set to the desired value 8. to a bi-level state.

As a result, a low level input is input to the input terminal of the NAND circuit 102, and a bi level input is input to the input terminal of the NAND circuit 104, respectively.

The states of the other circuits are the same as in the case of attaching a button with two holes.

Note that at this time, the output of the delay circuit 106 is at a low level, and a low level input is input to the NAND circuit 104.

Then, the pedal P is depressed to start sewing between holes 1 of the improvement row of the four-hole button B, and as a result, each circuit changes from the bi-level to the low-level state of the operating microswitch MSI. The same operation as the two-hole button attachment is performed until the last moment.

Then, when the button attachment between holes 1 in the upper row is completed, the operating microswitch MSI becomes low level.

Then, the delay circuit 97 does not go to the low level immediately, but maintains the bilevel until time T1 as described above, so the switching transistor Tr2 conducts, energizes the electromagnetic solenoid 65, rotates the wiper 72, and disconnects the signal. The thread is pulled out onto the top surface of the fabric.

On the other hand, at this time, when the low level output of the NAND circuit 99 is attached to a two-hole button, a bi-level input is input to the NAND circuit 102 via the NOT circuit 103 and the flip-flop is applied.

The FF is inverted to the reset state, but in the case of this four-hole button attachment, since a low level input is input to the other input terminal of the same NAND circuit 102 by the switching microswitch MS2, the flip-flop is FF is not reset.

Therefore, when the output of the delay circuit 97 changes from the by level to the low level, the NAND circuit 99 immediately becomes the by level and inputs the input to the NAND circuit 94, and the NAND circuit 94 becomes low level again and the switching transistor Tr
, and the electromagnetic solenoid 22 is energized.

Then, the upper row of holes 1 of the four-hole button B is closed, and the locking piece 19 that is engaged with the control disk 14 fixed to the main shaft 12 is moved upward again to release the engagement, and the main shaft 12 to start sewing between the holes 2 in the lower row.

On the other hand, the output of the delay circuit 106 is also
12 from the rise of the by level from the low level of
To maintain time-by-level output, the next stage NAND
The output of the circuit 107 changes from bi level to low level,
Bi-level input is input to the NAND circuit 104,
Immediately after the switching transistor Tr1 becomes conductive again, the next stage flip-flop lower F is reset.

Then, when sewing between the holes 2 in the lower row of buttons B is started, except for the reset state of the flip-flop FF,
Each circuit operates in the same manner as the sewing operation in the upper row.

Eventually, when the stitching between holes 2 in the lower row is completed, the NA
The output of the ND circuit 99 changes from the bilevel to the low level, and the electromagnetic solenoid 65 is energized again to rotate the wiper 72 and again pull out the yarn cut by the movable blade 63 onto the upper surface of the work cloth.

After time T1, the NAND circuit 99 becomes a bi-level output and inputs the output to the NAND circuit 94. However, since the flip-flop FF is in a reset state, switching 1 to transistor Tr1 are made conductive for the third time. Each circuit returns to its initial state without any interruption, and is completed in preparation for attaching the next four-hole button B.

In this manner, when sewing the four-hole button B, after the stitching between holes 1 in the upper row is completed, the delay circuit 97 and the NAND circuit controlled by the operation of the operating microswitch MSI are connected. 99 and the flip-flop NAND circuit 94 are operated to energize the electromagnetic solenoid 22, so that the stitching between the holes 2 in the lower row is performed continuously, so that the operator can sew the holes 2 in the lower row. It is possible to sew between holes 1 and 2 of the button continuously without having to drive the sewing machine again for the purpose of re-operating the sewing machine. Then, the wiper 72 is rotated in a well-timed manner based on the output of the NAND circuit 99 to pull out the thread cut by the movable blade 63 onto the upper surface of the work cloth. There is no need to worry about it crossing over to the lower row and spoiling the appearance.

After starting sewing between the holes 2 in the lower row, the output of the NAND circuit 99 is inputted to the NAND circuit 104 via the delay circuit 106, and the output of the switching micro switch MS2 is inputted to the NAND circuit 104. The next stage fritsf is output based on the output.

After setting the FF to the reset state and sewing between the holes 1 and 2 of the upper and lower rows of button B of the flip-flop holes in the NAND circuit 94 so as not to perform the third sewing operation, the sewing machine is operated. The buttons can be controlled reliably without having to do anything.

Moreover, the number of stitches can be changed from 8 to 16 stitches or 1 stitch during the sewing process.
Even if the sewing machine changes from 6 stitches to 8 stitches, the sewing operation for the next hole gap 2 in the lower row will be performed based on the operation of the operating micro switch MSI, which is activated when the stitching in the hole gap 1 in the upper row is completed. Therefore, there is no need to change or adjust the reference time when sewing is changed midway, unlike in the past, and even if the count is changed midway, it can be controlled reliably.

Furthermore, the output of the switching microswitch MS2 is changed by switching the vertical feed adjustment lever 77, and the NAND circuit 102 that operates based on the output is connected to the reset side input terminal of the flip-flop FF. It is possible not only to attach a button to a button but also to attach a button with two holes, and moreover, it can be controlled reliably.

As described in detail above, the present invention rotates the main shaft of a sewing machine based on the temporary operation of an appropriate actuating means, and stops the rotation of the main shaft when the formation of one group stitch is completed. A cycle sewing machine equipped with a motion control means, a manual switch for activating the actuation means to start driving the cycle sewing machine, and a bistable means that is placed in one stable state based on the operation of the manual switch.
a drive control means for activating the operating means based on the output when the bistable means is in the one stable state; and a cycle sewing machine is driven by the drive control means to stitch the group stitches. an actuation switch which, when formed, is actuated in response to the cycle sewing machine being stopped by said motion control means; an output based on actuation of said actuation switch; and bistable means which is placed in said one stable state. and a re-driving means for reactivating the drive control means by the output of the re-driving circuit, and after the cycle sewing machine is re-driven by the re-driving circuit, the bistable means is set to another stable state and the cycle sewing machine is started for the third time. and a drive prevention control means for preventing the drive of the bistable means, which is placed in one stable state based on the operation of the manual switch after forming one group stitch; The drive control means is operated by the output of the actuating switch which is operated in response to the sewing machine being stopped by the movement control means, and the output of the re-driving means which is operated, thereby causing the sewing machine to perform cycle drive again. forming a group stitch, and at the same time, the bistable means is reversed to prevent the third cycle drive of the sewing machine based on the operation of a drive prevention control means operated by an output signal from the re-drive means. Since the drive is controlled, even if the preset number of stitches is changed during the formation of one group of stitches, the sewing machine will continue to operate accurately and reliably without stopping in one cycle. be able to.

Further, the bistable means which is placed in one stable state based on the operation of the manual switch configured above is newly provided with another drive blocking control means whose operation is controlled by the output of the manual switch, so that the same stabilizing means is It is also possible to form group stitches between the holes of a two-hole button by setting the sewing machine to another stable state and preventing the second cycle drive, making it an industrially valuable driving device for cycle sewing machines. It has the following effects.

[Brief explanation of the drawing]

Fig. 1 is a front view of a button with four holes to explain an embodiment of the present invention, and Fig. 2 is a front view of a button with two holes, and Fig. 3 is a front view of a button with two holes. The figures are a perspective view of the sewing machine with the button, Figure 4 is a left side view of the sewing machine with the button, Figure 5 is a front view of the sewing machine with the button, Figure 6 is an enlarged left side view of the main parts, and Figure 7. , Figure 8, Figure 9,
Figure 10 is an explanatory diagram of the vertical feed adjustment lever installed on the back side wall of the sewing machine with the button, Figure 11 is the electric control circuit diagram of the control device of the sewing machine with the button, and Figure 12 is the main part time of the electric control circuit. It is a chart diagram. Main shaft...12, control lever...16,
Locking piece...19, Electromagnetic solenoid...
22. Vertical feed adjustment lever...77, NAND circuit...93. 94. 99.102,104
, delay circuit...97,106, operating microswitch...MS1, switching microswitch...MS2, starting microswitch...
...MS3, flip-flop...FF,
Switching transistor: Trl, pedal: P, sewing machine with button: M0

Claims (1)

[Scope of Claims] 1. Movement control means for rotationally driving the sewing machine main shaft based on the temporary operation of an appropriate actuating means and stopping the rotation of the sewing machine main shaft when the formation of one group stitch is completed. A cycle sewing machine comprising: a manual switch for activating the actuating means to start driving the cycle sewing machine; a bistable means that is brought into a stable state based on the operation of the manual switch; and the bistable means a drive control means for activating the actuation means based on an output when the one stable state is established, and when the cycle sewing machine is driven by the drive control means to form the group stitch; an actuation switch operated in response to the cycle sewing machine being stopped by the motion control means; an output based on the actuation of the actuation switch; and an output of the bistable means placed in the one stable state. a re-drive control means for re-enabling the drive control means; and after the cycle sewing machine is re-driven by the re-drive control means, the bistable means is set to another stable state and the cycle sewing machine is operated for the third time. A drive device for a cycle sewing machine, comprising: drive prevention control means for inhibiting the drive. 2. The drive device for a cycle sewing machine according to claim 1, wherein the bistable means comprises a flip-flop circuit. 3. A cycle sewing machine equipped with a motion control means for rotationally driving the sewing machine main shaft based on the temporary operation of an appropriate operating means and stopping the rotation of the sewing machine main shaft when the formation of one group stitch is completed, an actuation switch for actuating the actuation means to start driving the cycle sewing machine; a bistable means that is placed in one stable state based on the actuation of the actuation switch; and the bistable means is brought into the one stable state. drive control means for activating the actuating means based on the output when the cycle sewing machine is being operated; and when the cycle sewing machine is driven by the drive control means to form the group stitches, the movement control means activates the cycle sewing machine. an actuation switch that is actuated in response to the sewing machine being stopped; and an actuation switch that sets the bistable means to another stable state by an output based on the actuation of the actuation switch and prevents the second cycle sewing machine from being driven. one drive blocking control means; and a re-drive control means for reactivating the drive control means based on an output based on the actuation of the activation switch and an output of the one bistable means placed in a stable state. , a second drive prevention control means for setting the bistable means to another stable state and preventing the cycle sewing machine from being driven a third time after the cycle sewing machine is redriven by the redrive control means; and a switching means for selectively activating either one of the second drive prevention control means. 4. The cycle sewing machine is a button-equipped sewing machine capable of sewing two-hole and four-hole buttons, and when sewing a two-hole button, the first drive prevention control means is enabled and the four-hole button is sewn. 4. The drive device for a cycle sewing machine according to claim 3, wherein the switching means is switched to enable the second drive prevention control means when sewing a hole button.