JPS626468B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a button sewing device that is equipped with a device for correcting the front and back sides of a button and the direction of a sewing hole and transporting the buttons into a sewing machine sewing section.

Conventionally, in this type of device, the
As stated in the publication, the rotary body is located above the button, which is normally placed on the protruding piece of the conveying body, so that it cannot engage with the button, and only when the sewing machine is in operation is the rotating body It was common for sewing machines to engage the top surface of a button resting on a protruding piece and rotate the button, but this type of sewing machine requires an extremely short sewing cycle time, so the button could not be sewn within that period. The sewing hole may not match well with the protruding piece of the carrier, and if the sewing hole of the button does not match the protruding piece, the button may fall off midway as the carrier moves toward the sewing machine sewing section. There is a drawback that an accident may occur in which the next button to be sewn cannot be carried into the sewing machine sewing section.

The object of the present invention is to eliminate the above-mentioned drawbacks by using a rotary body that always engages with a button mounted on a projecting piece of a carrier and rotates it.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of the entire automatic button sewing device according to the present invention placed on a table 40. a button loading device B that sets the sewing holes h ₁ and h ₂ of W in the sewing device A while correctly supporting the sewing holes h 1 and h 2 in a specific direction with respect to the vertical movement path of the needle 1;
and a button feeding device C that feeds the button W with its surface facing upward to the button carrying device B. In addition, the sewing device A and the button carrying device B are
They are screwed to the base 41 at predetermined locations, and are configured to maintain compatibility with respect to their mutual positional relationships.

(i) Sewing device A This sewing device A is equipped with a known thread trimming mechanism and wiper mechanism, and, like the sewing machine shown in JP-A-50-72754, is started by a startup operation and the thread is removed after a predetermined number of stitches have been formed. This is a cycle stitch sewing machine of the type in which the cutting mechanism and wiper mechanism operate and the machine stops when the needle 1 comes out of the workpiece placed on the upper surface of the bed 2.The main shaft is rotatably supported on the sewing machine frame. A pulley 5, which is connected via a belt 4 to one pulley 137a of a motor M, which rotates when the power switch SW ₁ is turned on, is loosely fitted into one end of the 3, and a pulley 5 is loosely fitted between the pulley 5 and the main shaft 3. is provided with a clutch mechanism (not shown), the piece 6 of which is arranged to protrude outward from the end face of the main shaft 3 via the elastic force of an elastic body (not shown), and the piece 6 is moved inside the main shaft 3. The main shaft 3 and the pulley 5 are provided so that an interlocking relationship is created by pressing them toward each other. Furthermore, a cam body 7 having a circumferential portion 7a and a notch 7b cut out in the radial direction in the circumferential portion 7a at a position corresponding to the stop of the sewing machine is fixed to the main shaft 3. The cutoff lever 8, which has an arm 8a corresponding to the piece 6 and an arm 8b corresponding to the cam body 7, is supported on a shaft 9 parallel to the main shaft 3, and is always supported by the elastic force of an elastic body (not shown). One end of the arm 8b is brought into pressure contact with the circumferential portion 7a of the cam body 7, and the arm 8a is disengaged from the piece 6, rendering the clutch inactive, and the electromagnetic solenoid SW is energized, so that the cutoff lever 8 is moved to the second position. As the arm 8b rotates by a predetermined angle in the clockwise (arrow) direction in the figure, one end of the arm 8b separates from the cam body 7, and the arm 8a presses the piece 6, which causes the clutch to be activated and the main shaft 3 to be connected to the motor M. They are arranged to rotate in conjunction with each other.

On the bed 2 facing the head 11 on which the needle bar 10 is movable up and down, a cloth support 12 and a pair of left and right button holding jaws 13 arranged in the movement path of the needle 1 are arranged as a feed arm 14 and a support arm, respectively. 15
The needle 1 is controlled to alternately pass through the sewing holes h ₁ and h ₂ of the button W held in the button holding jaw 13 by a device such as that shown in Japanese Patent Application Laid-open No. 35-7943, for example. be done. Further, as shown in FIG. 9, the pair of button holding jaws 13 have one of the facing surfaces 13a and 13b flattened, and the other has a recess 13c equal to the arc of the smallest button among the buttons that can be sewn. so that the button carried in is supported at three points K ₁ , K ₂ , and K ₃ , and the button holding jaw 13 has an opposing surface portion as shown in Japanese Patent Publication No. 29-5830. Due to the elastic force of an elastic body (not shown), the button W is always brought closer (closed) than the diameter of the button W, and the shoulder screw 17, whose shaft portion is loosely fitted into the elongated hole 16 of the support arm 15, is inserted into the right side of FIG. , they move away from each other (open) against the elastic force of the elastic body, and the opposing surfaces of the buttons W
are spaced apart from each other by the diameter of the The adjusting body 18 is rotatable and lockable around the shoulder screw 20 by a shoulder screw 19, and regulates the normal position of the shoulder screw 17 and the normal separation distance of the button holding jaws 13. In order to tilt the sewing device A to the left in FIG.
It has an engaging part 22 that makes surface contact with the support arm 1
The interlocking rod 24 is movable in the longitudinal direction on the right side of the screw 5 and is always moved forward by the elastic force of the elastic body 23. step screw 20
The release lever 21 is connected to one end of an operating rod 26 which is rotatable around the button, and the button holding jaw 13 is opened when the release lever 21 is rotated clockwise in FIG.

Further, the support arm 15 is lowered around the connecting shaft 28 with the feed arm 14 until the lower surface of the button holding jaw 13 comes into contact with the upper surface of the cloth support 12 due to the elastic force of the coil spring 27 compressed between the support arm 15 and the lower surface of the arm 11. , and is raised via a lifting hook 30 by rotating a lifting lever 29 of a button carry-in device B, which will be described later, clockwise in FIG.

The wiper arm 31 is of a known type, and has a hook at the lower end that can engage the needle thread connected to the needle 1 and the object to be sewn, and an L-shaped bent corner that extends downward from the arm 11. After the thread cutting mechanism operates and cuts the thread connected to the seams below the bed 2, the electromagnetic solenoid WM is energized, as shown in Fig. 2. It is provided so that it rotates in the direction of the arrow and returns to its original position upon demagnetization.

(ii) Button carry-in device B This button carry-in device B consists of a conveying means for carrying the button W on its upper surface between the button holding jaws 13 of the sewing device A, and a hole h for sewing the button W on the conveying means. ₁ , _h2 in a specific direction, and individual feeding means for feeding the buttons W one by one between the conveying means and the orienting means, and these are provided on the same drive shaft 33. It is controlled by cam bodies 34, 35, and 36 which are arranged in the same direction. The button carrying device B also incorporates operating means for activating all the devices of the present invention.

FIG. 4 is an exploded perspective view of the individual feeding means;
FIG. 3 is an exploded perspective view of the button carrying device B in which this individual feeding means is omitted. A gear 39 that meshes with a gear 38 provided on the output shaft of a speed reduction device 63 that operates via a belt 138 that is stretched around the other pulley 137b of the motor M is loosely fitted to the drive shaft 33 that is supported on the machine frame 37. At the same time, a clutch mechanism 42 is provided between the post portion of the gear 39 and the drive shaft 33, and the spring 4 is always
3, the activation lever 44 is rotated clockwise about the shaft 45, and its free end engages with a piece (not shown) of the clutch mechanism 42, thereby closing the gear 39 and the drive shaft 33. Once the interlocking relationship of the clutch mechanism 42 is released and the activation lever 44 is rotated counterclockwise and the activation lever 44 is disengaged from the clutch mechanism 42, the activation lever 44 and the clutch mechanism 42 are disengaged from each other. The drive shaft 33 is connected to the gear 3 until they engage again after one rotation.
9 to rotate counterclockwise. Further, on the outside of the right side wall 37a of the machine frame 37, there is provided an electromagnetic circuit which is energized for a required set time via switch SW ₂ in connection with stopping the sewing device A or pressing the push button 46, as will be described later. Install solenoid FM and uncheck it 47
The lower end of the link 49 connects to the arm 48 fixed to the shaft 45.
The actuating lever 44 is configured to rotate counterclockwise against the spring 43 when the electromagnetic solenoid FM is energized.

Regarding the transportation means, as shown in Figure 3,
A support shaft 5 supported on the machine frame 37 parallel to the drive shaft 33
A spring 52 is stretched between the first swing lever 51, which has one end rotatably supported by the machine frame 37, and the intermediate roller 53 presses against the outer periphery of the feed cam 36 fixed to the drive shaft 33. , so that it is displaced upward from the state shown in FIG. 3 during one rotation and then returned to its original state.

Further, a window 37c is formed in the front part of the left side wall 37b of the machine frame 37, and a shaft 56 with an arm 54 at the upper end and a swing arm 55 at the lower end is vertically attached to the upper projecting part of the window 37c. The other end of the first swing lever 51 is supported by links 57, 58,
It is connected to the arm 54 via 59. Note that the lower half of the swing arm 55 is bent horizontally, and support pins 60a and 60b that are loosely fitted into the sewing holes h ₁ and h ₂ of the button W are vertically provided on the plane of the free end. 6, the button W can be held horizontally and the sewing holes 60a, 60b are not oriented incorrectly even when the button W is being turned. Support pin 6 due to cam surface change
0a and 60b cross the passage path of the needle 1 and overrun by 1/2 of the dimensional difference with the diameter of the sewing holes h ₁ and h ₂ of the button W, then the passage path of the needle 1 is moved in the opposite (return) direction. Beyond that point, move by 1/2 of the above dimensional difference (return), then move from that position in the button loading direction by a distance shorter than the above dimensional difference,
After stopping at that position (after time _t7 ), the stopper 14 is moved by the elastic force of the spring 52.
It is provided so that it can return in the opposite direction until it comes into contact with zero.

Note that the release cam 134 fixed to the drive shaft 33
The same shaft 135 as the release lever 21 corresponds to
Immediately after the drive shaft 33 rotates, the lever 136 supported on the left side wall 37b rotates clockwise in FIG. Provided for.

Regarding the orientation means, as shown in FIG.
The rotating arm 55, which has been returned to its original position, has a rotating body 62 on its lower end, which is provided with a rubber cap 61 that has a large frictional resistance with the button W.
The rotary body 62 is supported vertically opposite to the button mounting portion of the rotary body 62 and rotates in conjunction with a shaft 65 via a belt 64. A shaft 65 supported perpendicularly to the machine frame 37 is provided with a spur gear 66 so as to interlock with the shaft 67 supported on the machine frame 37 in parallel to the drive shaft 33 via bevel gears 68 and 69. The spur gear 66 has one end fixed to the machine frame 37 via a coil spring 70, and the other end fixed to the support shaft 50.
The middle of the timing belt 72 connected to the free end of the second swinging lever 71 supported by the gear 39 is stretched over the middle of the timing belt 72, and the roller 73 provided at the middle of the second swinging lever 71 is always moved by the elastic force of the coil spring 70. While the rotary cam 34 makes one rotation from the state shown in FIG. Configure it to repeat twice. An elastic free end 75a of a vertical operating arm 75 supported by a shaft 80 on a beam 37d of the machine frame 37 is loosely fitted into a groove 74 formed horizontally in the middle of the rotating body 62, and the vertical operating arm 75 swings. a position where the rubber cap 61 at the lower end comes into pressure contact with the upper surface of the button W sent onto the pins 60a, 60b of the swing arm 55 from an individual feeding means to be described later;
The rotating body 62 is provided to move up and down so as to move to a position where it does not contact the button W. A coil spring 76 is stretched between the vertical operating arm 75 and the machine frame 37, and a link 78 is connected to the free end of a third swinging lever 77 that supports one end of the vertical operating arm 75 on the support shaft 50. The third swing lever 7 is always connected by the elastic force of the coil spring 76.
A roller 79 provided in the middle of the third
The rotating body 62 is provided so as to rise from the position where it presses against the button W and then return while the vertical cam 35 rotates once from the state shown in the figure.

Regarding the individual feeding means, as shown in FIGS. 4 and 5, a tilting platform 81 whose one end is cantilevered on the right side wall 37a of the machine frame 37 so that the upper surface is inclined downward toward the swing arm 55 has an intermediate section. A rectangular hole 82 is formed in the hole 82, into which a boss 85 of a pair of gutter bodies 84a, 84b forming a guide passage 83 for the button W is loosely fitted, and is supported by shafts 86a, 86b perpendicular to the guide passage 83. At the same time, each gutter body 8
A screw shaft 87 in which threaded portions with different helical directions are screwed into the bosses 85 of 4a and 84b is supported on the inclined table 81, and by rotating it in a desired direction, the opposing surfaces of the gutter bodies 84a and 84b come into contact with and separate from each other. Button W
The guide passage 83 is provided so that its width can be adjusted as desired in accordance with the diameter of the guide passage 83. The middle of the shaft 86a is fixed to the gutter body 84a, and the middle of the shaft 86b is fixed to the gutter body 8.
4b, thereby gutter bodies 84a, 84
Even when the guide path 83 is moved, parallelism of the guide passage 83 can be ensured. In addition, a ceiling body 90 in which cutouts 88 and 89 corresponding to the guide passage 83 are formed in a transparent flat plate and spaced apart in the direction of movement of the buttons W is screwed to one of the gutter bodies 84a, so that the buttons W can move in a line inside the guide passage 83. It is arranged so that it passes in alignment. Further, at the terminal end of a guide passage 83 that corresponds to and extends above the button mounting portion of the swing arm 55 and extends beyond the free end of the inclined base 81,
A stopper 133 contacts the tip of the button W that has slid down the guide path 83, and a stopper 1
The button W in contact with the button 33 forms an opening 91 from which it can fall vertically, and the opening 91 is opened and closed by a flat plate-like shutter 92 provided at the lower end of the slanted base 81 so as to be horizontally movable as will be described later. Make it possible. A shaft 93 is attached to the back of the tilting table 81.
The swinging link 94, which is supported by the arm 94 and always receives an elastic force in the clockwise direction in FIG. After the vertical operating arm 75 has rotated a predetermined amount clockwise from the state shown in FIG.
The lower end of the swing link 94 touches the shaft 97 and the fourth
It is installed so that it can rotate clockwise as shown in the figure. In addition, a pin 99 eccentrically provided on a shaft 98 supported on the tilting table 81 is swung so that the shutter 92 moves from the state shown in FIG. 5a to the state shown in FIG. Dynamic link arm 94
The free end of a pin 101 provided perpendicularly to the axis of the shaft 98 is loosely fitted into a long hole 102 formed in the shutter 92. The arm 94c of the swing link 94 is an arm 105 supported by a shaft 104 on a vertically installed bearing portion 103.
They are connected to each other via a link 106, and are also connected to each other through a long hole 107 so that the arm 105 does not immediately rotate even if the link 106 moves to the left in FIG.
They are connected by stepped screws 108 via. Bearing part 10
The shaft 104 protruding from the front side of 3 has a free end 10
The shaft 10
4, the bent end 1 of the first gate 109
09a is provided so as to go in and out of the guide passage 83 of the gutter bodies 84a and 84b. Moreover, the bearing part 103
A second gate is attached to a shaft 110 provided parallel to the shaft 104 in which a piece 112a supported at one end with the lower end of the rod 111 facing the notch 88 of the ceiling body 90 can be movably locked with a screw 139. The rod 112 is provided in the second gate 112 so as to support the middle of the rod 112 and to allow the rod 111 to enter the guide passage 83 from the notch 88 when the first gate 109 rotates counterclockwise from the state shown in FIG. A long hole 11 with a pin 113 formed in the first gate 109
Fit loosely into 4. The rod 111 is a compression spring 115
When the second gate 112 rotates clockwise to the maximum as shown in FIG. 5b, the rod 111 contacts the button in the guide passage 83 before the rotation is completed. After that, only the second gate 112 rotates in conjunction with the first gate 109 while compressing the spring 115.

Regarding the operation means, as shown in FIG. 3, the above-mentioned lift lever 29 is provided on the outside of the left side wall 37b, and the shaft 1 is supported on the machine frame in parallel with the drive shaft 33.
16, a return cam 11 fixed to the drive shaft 33;
7 and an interlocking rod 1 provided with a roller 119 corresponding to the outer peripheral surface of a starting cam 118 loosely fitted to the drive shaft 33.
The base of the shaft 116 is fixed to the right side wall 37a when the roller 119 is raised to the state shown in FIG. 3 by the return cam 117 and starting cam 118.
The base of the pressing lever 121 is fixed so as to press the switch _S3 which is fixedly arranged at the base of the pressing lever 121. Further, the starting cam 118 receives a force acting counterclockwise in FIG. 3 by a coil spring 122 stretched between it and the machine frame 37, and is loosely fitted to the drive shaft 33, and is connected to a foot pedal (not shown). The actuating lever 123 is rotated clockwise in the figure by depressing the lever.
It is provided so as to rotate against the coil spring 122 via the engagement pin 124 due to the above rotation. Return cam 117, starting cam 118, interlocking rod 120
The relationship between the operating lever 123 and the roller 1 is always
19 rests on the high part of the starting cam 118 as shown in FIG.
The rollers 119 fall from the high part of the starting cam 118 to the low part of the return cam 117 by rotating against the If the user climbs onto the high part and releases the foot pedal during that time and the starting cam 118 is returned to its original position by the spring 122, the drive shaft 33 will further rotate and the roller 119 will be rotated.
When it comes off the high part of the return cam 117,
The roller 117 climbs onto the higher part of the starting cam 118 again.

(iii) Button supply device C This button supply device C is
Multiple buttons W similar to those shown in the publication
, and the excitation current of the excitation coil 126 is turned on via the diode D ₁ and variable resistor R ₆ . The vibration generator 127 vibrates the bowl 125 via an elastic plate (not shown) when the vibration generator 1 is turned off.
27, the buttons W in the bowl 125 are sequentially fed out from the front side to the flexible pipe 128 that spans the bowl 125 and the gutter bodies 84a, 84b.

7 and 8 are electrical circuit diagrams of the present invention, and each symbol thereof will be explained below.

SW ₁ to _{SW 8} are switches, and switch SW ₅ is pressed by a lever 129 that rotates clockwise in FIG. 2 in conjunction with the return of the cutoff lever 8, and is always maintained in the state shown in FIG. 7. The switch SW ₆ is normally open, but is provided so that it is instantaneously closed by a cam 130 just before the drive shaft 33 completes one revolution from the rest state shown in FIG. The switch SW ₇ is manually operated when sewing a two-hole button or a four-hole button, and the illustrated state is suitable for sewing a two-hole button. Switch SW ₈
Although not shown in detail, in connection with the completion of one stitching cycle of sewing device A, if the closing switch SW ₇ is adapted to sewing four-hole buttons, the above-mentioned sewing cycle will be described later until it is completed twice. transistor
This acts to prevent T ₅ and T ₆ and transistors T ₈ and T ₉ from conducting. C ₁ to _{C 8} are capacitors, R ₁ to _{R 4} are resistors, R ₅ and R ₆ are variable resistors, and each of these capacitors and each resistor C ₃ − _{R 1} ,
The respective time constants are determined by C ₄ −R ₂ , C ₅ −R ₃ , C ₆ −R ₅ , and C ₇ −R ₄ . _T1 to _T10 and
_T14 is an npn type transistor, _T11 to _T13
is a pnp type transistor. D ₁ ~ _{D 10} are diodes, Z ₁ ~ _{Z 6} are Zener diodes, S ₁ ~ _{S 4}
is a thyristor. Also, 131 is a power transformer, 132 is a rectifier, and X, Y, and Z are terminals.
Between terminals X and Z, a capacitor C ₁ is connected between terminals
smoothed by and excited solenoids SM, WM,
Current is supplied to FM. In addition, capacitors C ₁ and C ₂ and a Zener diode Z ₁ are connected between terminals Y and Z.
By a known constant voltage circuit constructed by
Current is supplied to the control circuits of the sewing device A and the button loading device B. I to Ho are power transformer 131
These are the primary input terminals for connecting 220V, 200V, 115V, 100V, and 0V in the order of A, B, and C. The excitation circuit of the excitation coil 126 is connected to the input terminals D and E, and is connected to the power transformer 1.
Change the AC voltage input to 31 from 200V in Figure 8.
It is provided so that the voltage flowing through the variable resistor R ₆ and the exciting coil 126 does not change even if the voltage is changed to 220V or 100V as appropriate.

This invention has the above configuration, and its operation will be explained next. First, when the power switch SW ₁ is turned on, the motor M rotates, which causes the pulley 5 of the sewing device A to rotate idly with respect to the main shaft 3, and the gear 3 of the button carrying device B via the deceleration device 63.
9 idles with respect to the drive shaft 33 together with the rotating cam 34, the rotating body 62 is
Fig. 5a has been lowered so that it can engage the button W.
Rotate back and forth at the position. Furthermore, since a full-wave rectified and smoothed power supply current is input to terminal _X , and a constant voltage power supply current that has been similarly rectified is _input to _terminal
Charged via SW ₂ , SW ₃ , and SW ₅ .

Next, when the switch SW ₄ (Fig. 8) is turned on, a different current is supplied to the excitation coil every half wave of the commercial frequency via the variable resistor R ₆ and the diode D ₁₁ , and the bowl 125 sets the variable resistor R ₆ . The buttons W vibrate with a strength corresponding to the resistance value, and the buttons W with the front facing up are sent out one after another to the flexible pipe 128, and as shown in FIG.
The buttons are lined up in a line along the guide path 83 of the button carrying device B, and the first preparation stage is completed.

When _the push _{button 46 is pushed in from this state to switch the switch SW 2 from the} state shown in FIG.
Since the discharge occurs through the thyristor S ₁ and the transistor T ₁₀ , the Zener diode Z ₂ becomes conductive (conduction is turned on and non-conduction is turned off), which turns on the transistor T ₁₁ . Therefore, the transistors T ₈ and T ₉ are turned on via the diode D ₆ for a time t ₂ determined by the time constants of the resistor R ₄ and the capacitor C ₇ , and the electromagnetic solenoid FM is energized.
As a result, the armature 47, arm 48, shaft 45
Since the starting lever 44 is rotated in the direction of the arrow in FIG.
rotates, and after t ₂ hours, start lever 4 is turned.
4 returns and the drive shaft 33 rotates once, the clutch 42 disengages and stops, and just before that, the switch
SW ₆ is closed by the action of cam 130 and the transistor
Since T ₁₀ is turned off, thyristor S ₁ and transistor T ₁₁ are turned off. Drive shaft 3 as above
3 rotates, the vertical operating arm 75 is rotated upward by the vertical cam 35 and the coil spring 76 via the third swing lever 77, and is maintained at that position for ₆ hours before returning to its original position. It returns to the position where it cannot engage the button W (FIG. 5b) after rising for _t6 hours. Furthermore, when the vertical operating arm 75 rotates clockwise in FIG. 3 (opposite in FIG. 4), the link 94 rotates in the direction of the arrow in FIG. 4, so the shaft 98 rotates via the pin 99. This allows the shutter 92
is moved from Fig. 5a to the open part 9 as shown in Fig. 5b.
1, and the arm 105 rotates in the direction of the arrow in FIG. 4 via the link 106. As a result, the first gate 109 rotates counterclockwise via the shaft 104 from the state shown in FIG.
The second gate 112 is interlocked with the first gate 109 via a pin 113, and the lower end of the rod 111 is connected to the bent end 1.
Since 09a engages with the top surface of button _{W2 3} hours before it comes out of notch 89, vertical operating arm 7
button W ₁ by turning clockwise in Figure 3 of 5.
Only the slider slides down the guide passage 83 by its own weight and gets on top of the shutter 92 which is blocking the open part 91 first. Further, while the rotating body 62 is rising, the shutter 92 closes the open portion 91, and during that time, the first swing lever 51 is controlled by the feed cam 36, and the swing arm 55 remains empty and operates as described below. After the operation is completed, the vertical operating arm 75 is activated by the coil spring 76.
to return against the Then, contrary to the above, the rotating body 62 descends, the rubber cap 61 comes into pressure contact with the button _W1 shown in _FIG .
Since it retreats to the position shown in Figure a, when the sewing holes h ₁ and h ₂ match the support pins 60a and 60b, the button
W ₁ is mounted horizontally on the mounting portion of the swing arm 55 . Moreover, since the arm 105 rotates counterclockwise in FIG. 4 _two hours after the rotor 62 is returned to its original position through the elongated hole 107, the first gate 109 and the second gate are rotated from the state shown in FIG. 112 rotate clockwise and counterclockwise, respectively, and return to the state shown in _{FIG .} Since the next button W ₂ is separated from the bent end 109a
blocked by.

Therefore, in order to initially set the button W in the button holding jaw 13 of the sewing device A, it is necessary to operate the push button 46 twice in succession. That is, when the push button is operated for the second time, since the first button _W1 is set on the swing arm 55, the shutter 92 is
While the button W 2 is blocking the opening 91, the next button W ₂ is sent out onto it, and the rotating arm 55 reciprocates to carry the button set in the placement part into the button holding jaw 13 from behind. . In addition _, to explain button loading in more detail with reference to FIG. ₉ , the solid line in FIG. However, if the frictional resistance between the button W and the side surface 13a of the button holding jaw 13 is greater than the frictional resistance between the button W and the side surface 13b when the button W is pushed in the direction of the arrow, the button W will rotate in the direction of the arrow in the figure. The passing points of needle 1 are 0 ₁ , 0 ₂ as shown by the two-dot chain line.
On the other hand, the holes h ₁ and h ₂ are biased in opposite directions, which causes problems during suturing. Therefore, the rotating arm 5 of the present invention
5, the support pins 60a, 60b extend beyond the passing points ₀₁ , ₀₂ of the needle ₁ , as shown by the two- _dot chain line in FIG.
After overrunning a distance of 1/2 of the dimensional difference with the diameter of 0b, the dimensional difference is overrun in the opposite direction beyond the passing points 0 ₁ and 0 ₂ as shown by the solid line in Fig. 9c.
Since it returns by 1/2, the button W rotates slightly in the direction of the arrow in the figure, and the centers of the sewing holes h ₁ and h ₂ are at the passing point 0.
_{1,0 2} . That is, from the state indicated by the two-dot chain line in FIG. 9b, the support pins 60a and 60b
When the support pin 60b moves to the right, the right side of the support pin 60b is in contact with the edge of the sewing hole _h2 , but the support pin 60a
Since the right side of is away from the edge of the sewing hole _h1 by 1/2 of the above-mentioned dimensional difference, the support pins 60a and 60b cross the passing points ₀₁ and ₀₂ and move in the opposite direction by 1/2 of the above-mentioned dimensional difference. During the run, only one support pin 60b is in contact with the edge of the sewing hole _h2 , and the button W is held in the ninth position.
Rotate in the direction of the arrow in Figure C. Subsequently, the support pins 60a and 60b further move to the left in FIG. 9 by a distance shorter than the dimensional difference (1/2 of the dimensional difference in the embodiment) from that position, and after remaining at that position for ₇ hours. It returns to its original position, but while the rotating arm 55 remains stationary for _t7 hours, the return cam 117 and interlocking rod 12
0, the raising lever 29 slightly moves clockwise in FIG. 3 via the shaft 116, and the button holding jaw 13 is further raised from the remote position on the cloth support 12 against the spring 27, so that the button W is moved upward from the support pin. 60a, 60b
It is pulled out upward from the top, and all preparations before suturing are completed.

Next, the work to be sewn is placed on the fabric support, the foot pedal is depressed, and the starting cam 118 is rotated clockwise against the spring 122 via the operating lever 123 from the state shown in FIG. The high part is Koro 119
When it comes off, the rising lever 29, the interlocking rod 120,
Since the pressing lever 121 is rotated by the spring 27 via the shaft 116 in the counterclockwise direction in FIG. SW ₃ switches from the state shown in FIG. This allows the capacitor to
Since the current charged in C ₄ discharges and triggers the thyristor S ₂ through the Zener diode Z ₃ to turn on, the base current of the transistor T ₁ is cut off, until it is transferred to the transistor T ₁ through the diode D ₃ . The current flowing through capacitor C ₈
flows into the air and triggers thyristor S ₃ to turn on. Therefore, the transistors T ₂ and T ₃ are turned on, so the electromagnetic solenoid SM is energized, the clutch is engaged, and the sewing device A is operated (main shaft 3 and pulley 5 are interlocked), and the button held in the button holding jaw 13 is closed. Sew W to the material to be sewn. Further, when the link 129 rotates counterclockwise in FIG. 2 in conjunction with the operation of the cutoff lever 8 in the direction in which the clutch is applied, and the switch SW ₅ is switched from the state shown in FIG. 7, P ₁ The potential at point _P2 decreases, turning off thyristor _S3 , but the potential at point P2 also decreases, causing capacitor _C5 to discharge through diode _D4 and switch _SW5 , turning on transistor _{T12 .} and T ₃ do not turn off, i.e. the electromagnetic solenoid SM remains on even when switch SW ₂ is switched, for a time t ₁ until the clutch is reliably actuated by the time constant of capacitor C ₅ and resistor R ₃ . .

After a predetermined number of stitches have been formed, the thread cutting mechanism is activated, and the cutoff lever 8 is returned to its original position, the clutch is disconnected (the interlock between the main shaft 3 and the pulley 5 is cut off), and the sewing device A is activated.
When the lever 129 stops, the lever 129 also returns and the switch is turned off.
Because SW ₅ is in the state shown in Figure 7 (thyristor S ₃
(is on) Transistors _T5 and _T6 are turned on and the electromagnetic solenoid WM is energized, which causes the wiper arm 31 to move forward in the direction of the arrow from the position shown in FIG. As the cut end of the thread is pulled out onto the workpiece, the capacitor _C6 is discharged after a predetermined period of time via the capacitor _C6 and the variable resistor _R5 , which causes the Zener diode to
Transistor T ₄ turns on via Z ₄ , transistors T ₅ and T ₆ turn off, and the electromagnetic solenoid
WM is demagnetized and the wiper arm 31 returns to its original state. Furthermore, at the same time as the electromagnetic solenoid WM is energized, the transistors T ₈ and T ₉ are turned on via the switch SW ₇ , so the electromagnetic solenoid FM is energized. The carry-in device B operates, and the sewn button W falls from the button holding jaw 13 due to its own weight, and then a new button W is transferred to the button holding jaw 13.
along with the capacitor C ₇ and resistor
Through R ₄ t After ₂ hours, the capacitor discharges and transistor T ₇ is turned on through Zener diode Z ₄ , so transistor T ₈
and T ₉ are turned off, which causes the electromagnetic solenoid FM
is demagnetized. Immediately before the operation of the button carrying device B ends, in other words, when the drive shaft 33 rotates approximately one rotation, the switch SW ₆ is closed by the cam body 130.
This turns off transistor _T10 , which turns off thyristor _S2 , and these electrical systems stop functioning.

Note that even if the push button 46 is pressed to activate the button loading device B, and the push button 46 is continued to be pressed until after the operation is completed, when the drive shaft 33 rotates once, the switch SW ₆ closes and the transistor T ₁₀ is turned on. Since the thyristor S ₁ is turned off, the transistor T ₁₁ is also turned off, and the capacitor C ₃ is not charged at this time, the button loading device B only operates once and then stops.

Furthermore, even if the switch SW ₃ is switched from the state shown in Fig. 7 to operate the sewing device A, and the push button 46 is pressed by mistake while the sewing device A has not yet stopped, the switch SW ₂ is switched from the state shown in Fig. 7. thyristor
When S ₂ is turned on, the potential at point P ₃ is sufficiently lower than the potential that makes Z ₂ conductive, so the discharge current of capacitor C ₃ flows to point P ₃ via diode D ₂ and the thyristor
_C1 is not triggered and therefore button feeder B is not activated while sewing device A is activated. This is the same even if the foot pedal is depressed only when the button carrying device B is in operation, and the switch SW ₃ is changed from the state shown in FIG. 7. That is, since thyristor _S1 is on, the discharge current of capacitor _C4 does not flow to the gate of thyristor _S2 , but flows to point _P4 via diode _D1 .

As described above, according to the present invention, during the operating period of the feeding mechanism, the rotating body is held elevated for a certain period of time and then returned to its lower position, and the conveying body is moved back and forth from the preparation position while the rotating body is held elevated. Due to this configuration, the button on the protruding piece is constantly rotated by the rotary body except when the button is fed out, so that the button on the protruding piece is constantly rotated by the rotating body until the next time the conveying body moves forward toward the sewing machine sewing part. The sewing of the button can be ensured to match the protruding piece,
This has the effect of preventing errors in bringing the button into the sewing machine seam portion.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the entire device of this invention, Fig. 2 is a perspective view of sewing device A, Fig. 3 is a perspective view of button carrying device B with some parts omitted, and Fig. 4 is omitted from Fig. 3. Exploded perspective view of parts, Figure 5 is an explanatory diagram of the operation of Figure 4, Figure 6 is a time chart, Figures 7 and 8
The figure is an electric circuit diagram, and FIG. 9 is an explanatory diagram of button loading operation. A is a button sewing machine, C is a feeding device, 55 is a conveying body, 61 is a rotating body, and 109, 112 are a first gate and a second gate constituting a feeding mechanism.

Claims (1)

[Scope of Claims] 1. A sewing machine that starts by a start operation to sew a button having a sewing hole to an object to be sewn placed on the upper surface of the bed, and stops after forming a predetermined number of stitches between the sewing holes; A feeding device that always feeds multiple buttons out of the container with the front and back sides in the same direction, and a feeding device that feeds out the buttons one by one from the container of the feeding device at the end of the sewing cycle of the sewing machine. A sewing machine includes an operating feeding mechanism, a sewing section of the sewing machine that has a protruding piece that stands up vertically corresponding to the sewing hole of the button, and receives a button fed out from the feeding mechanism on the projecting piece, and a preparation position that is spaced apart from the stitching section. A conveying body that reciprocates in relation to the operation of the feeding mechanism, and a position where the button can engage with the upper surface of the button which is disposed opposite to the protruding piece of the conveying body in the preparation position and is received by the protruding piece, and a position above the above position. It is equipped with a rotating body that moves up and down between positions and always rotates around the straight line of movement, and during the operating period of the delivery mechanism, the rotating body is held raised for a certain period of time and then returned down, and the rotating body is held raised. A button sewing device characterized in that a conveyance body is reciprocated from a preparation position during a period in which the button sewing device is used.