JPS6146158B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a sewing device having a button holding jaw and a sewing device that starts by manual operation and stops after forming a predetermined number of stitches, and a button formed with a plurality of sewing holes in a needle passage path. The present invention relates to a button loading device for loading in a correspondingly correctly oriented manner.

Conventionally, this type of button carrying device was
As described in Publication No. 3643, the pin and the sewing hole are engaged after the carrier simply moves forward to a predetermined position from a state in which a vertical pin is loosely fitted into the sewing hole to support the button. Since the button only needs to be removed to return to its original position, if the button rubs strongly against the button holding jaw on one side or moves blindly due to vibration during transportation, for example, when the carrier moves forward as shown by the two-dot chain line in Figure 9a, the button may be sewn. If the center of the mounting hole is offset from the center of the pin,
Because the button is sewn in this state, when the needle is bent by the tension of the needle thread and descends, the tip hits the top of the button, causing accidents such as breakage and damage to the button. Since the thread passes close to the sewing hole, the needle thread rubs against the edge of the sewing hole, causing fuzzing, and the formation of needle thread loops is inhibited, resulting in skipped stitches. The purpose is to eliminate the

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. W sewing holes h1, h2
Button loading device B that correctly supports the button in a specific direction with respect to the vertical movement path of needle 1 and sets it in sewing device A.
and a button feeding device C that feeds the button W with its surface facing upward to the button carrying device B. In addition, sewing device A and button carrying device B
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 SW1 is turned on, is loosely fitted into one end of the motor 3.
A clutch mechanism (not shown) is provided between the pulley 5 and the main shaft 3, and a part of the clutch mechanism 6 is arranged to protrude outward from the end surface of the main shaft 3 through the elastic force of an elastic body (not shown). By pressing the piece 6 toward the inside of the main shaft 3, the main shaft 3 and the pulley 5 are provided in an interlocking relationship. Furthermore, a cam body 7 having a circumferential portion 7a and a notch 7b cut out in the radial direction at a position corresponding to the stop of the sewing machine is fixed to the main shaft 3. Also,
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 an elastic body (not shown).
Due to the elastic force of the arm 8b, one end of the arm 8b comes 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 SM is energized, thereby opening the cutoff lever. 8 is rotated by a predetermined angle in the clockwise (arrow) direction in FIG. is provided to rotate in conjunction with the motor M.

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 h1 and h2 of the button W held in the button holding jaw 13 by a device such as that shown in, for example, Japanese Patent Application Laid-Open No. 35-7943. . 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. The buttons that were brought in after being formed are K1, K2, and K3.
In addition, as shown in Japanese Patent Publication No. 29-5830, the button holding jaw 13 is supported at three points such that its opposing surface is always smaller than the diameter of the button W due to the elastic force of an elastic body (not shown). are also close to each other (closed), and by moving the step screw 17 whose shaft portion is loosely fitted into the long hole 16 of the support arm 15 to the right in FIG. 2, they are separated from each other against the elastic force of the elastic body. The button W is moved (opened) in such a manner that the opposing surfaces thereof are separated from each other by a distance greater than the diameter of the button W. The adjusting body 18 is connected to the stepped screw 20 by the stepped screw 19.
The normal position of the step screw 17 is regulated, and the separation distance of the button holding jaws 13 is regulated in the normal state. In order to tilt the sewing device A to the left in FIG.
1 (Fig. 3), has an engaging part 22 that makes surface contact with
The interlocking rod 24, which is movable in the longitudinal direction on the right side of the support arm 15 and is always moved forward by the elastic force of the elastic body 23, has a long hole 25 into which the shaft of the step screw 19 is loosely fitted. The base is connected to one end of an operating rod 26 which can be rotated around a shoulder screw 20, and when the release lever 21 is rotated clockwise in FIG.
It is designed to open 3. Further, the support arm 15 has a coil spring 2 compressed between it and the lower surface of the arm 11.
7, the button holding jaw 13 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, and the lifting lever 29 of the button carrying device B, which will be described later, is moved downward as shown in FIG. It is adapted to be raised via a lifting hook 30 by rotating clockwise.

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 sewing hole h1 for the button W on the conveying means. .
It is controlled by cam bodies 34, 35, 36 provided above. The button loading 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 boss 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 an electromagnetic solenoid which is energized for a required set time via a switch SW2 in connection with stopping the sewing device A or pressing the push button 46, as will be described later. Install FM and its unmanned system 4
The lower end of 7 is linked to arm 48 fixed to shaft 45.
9, and the starting lever 44 is configured to rotate counterclockwise against the spring 43 when the electromagnetic solenoid FM is excited.

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. Also, the left side wall 37 of the machine frame 37
A window 37c is formed in the front part of the window 37c, and a shaft 56 having an arm 54 at the upper end and a pivot arm 55 at the lower end is vertically supported on the upper projecting part of the window 37c. The other end of the movable lever 51 is connected to the arm 54 via links 57, 58, and 59. The lower half of the swing arm 55 is bent horizontally, and the free end has support pins 60a, which are loosely fitted into the sewing holes h1 and h2 of the button W, on the flat surface of the free end.
60b is vertically provided, and the button W is held horizontally even when the turning arm 55 is turning, and the sewing holes 60a, 6 are
The button W can be held so that the direction of the needle 0b does not go out of order, and the rotating arm 55 is designed so that the support pins 60a and 60b are once aligned with the needle 1 by changing the cam surface of the feed cam 36 as shown in FIG. The sewing holes h1, h of the button W
After overrun by 1/2 of the dimensional difference from the 2nd diameter, move in the opposite (return) direction by 1/2 of the above dimensional difference beyond the passing path of needle 1 (return), and then from that position in the button's carrying direction. It is provided so that it moves by a distance shorter than the above-mentioned dimensional difference, stops once at that position (after time t7), and returns to the opposite direction until it comes into contact with the stopper 140 due to the elastic force of the spring 52. .

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 button, and a rotating body 62 is provided so as to rotate about 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 notches 88 and 89 corresponding to the guide passage 83 are formed in a transparent flat plate and spaced apart in the direction of passage of the button W is screwed to one of the gutter bodies 84a.
are arranged so as to pass through the guide passage 83 in a line. Further, at the end of a guide passage 83 that corresponds to and above the button mounting part of the swing arm 55 and extends beyond the free end of the inclined base 81, there is a tip of the button W that has slid down the guide passage 83. a stopper 133 that comes into contact with the stopper 13;
3 forms an opening part 91 from which the button W in contact can fall vertically, and the opening part 91 is opened and closed by a flat shutter 92 provided at the lower end of the slanted table 81 so as to be horizontally movable, as will be described later. Make it possible. A swinging link 94 supported by a shaft 93 on the back of the tilting table 81 and always receiving an elastic force in the clockwise direction in FIG. 4 connects the arm 94a to the vertical operating arm 75 via the link 95,
The link 95 and the arm 94a are connected by a shaft 97 through a long hole 96, and after the vertical operating arm 75 rotates a predetermined amount clockwise from the state shown in FIG. 3, the lower end of the long hole 96 hits the shaft 97 and swings. A movable link 94 is provided to rotate clockwise in FIG. 4. Further, due to the rotation of the swing link 94, the shutter 92
A pin 99 eccentrically provided on a shaft 98 supported on a tilting table 81 is inserted into a long hole 100 formed in an arm 94b of the swing link so that the pin 99 moves from the state shown in FIG. 5a to the state shown in FIG. While fitting, the shaft 98
The free end of a pin 101 provided perpendicular to the axis is loosely fitted into an elongated hole 102 formed in the shutter 92. The arm 94c of the swing link 94 is connected via a link 106 to an arm 105 supported by a shaft 104 on a vertically disposed bearing portion 103.
Even if 06 moves to the left in Figure 4, arm 10 will not move immediately.
5 is connected with a step screw 108 through a long hole 107 so that it does not rotate. The shaft 104 protruding from the front surface of the bearing portion 103 has a free end 109a.
The bent end portion 109 of the first gate 109 is bent downward to support the first gate 109 facing the notch 89 of the ceiling body 90, and the bent end portion 109 of the first gate 109 is bent by rotating the shaft 104.
a is provided so as to go in and out of the guide passage 83 of the gutter bodies 84a and 84b. In addition, a piece 112a, which supports the lower end of the rod 111 facing the notch 88 of the ceiling body 90 at one end, can be movably locked on the shaft 110 provided in the bearing part 103 in parallel to the shaft 104 with a screw 139. The second gate 112 is supported at the middle thereof, and the second gate 112 is supported so that the rod 111 enters into the guide passage 83 from the notch 88 when the first gate 109 rotates counterclockwise from the state shown in FIG. 5a. Pin 11 provided on gate 112
3 is loosely fitted into the elongated hole 114 formed in the first gate 109. The rod 111 is always pressed downward by the compression spring 115, and when the second gate 112 rotates clockwise to the maximum as shown in FIG.
The second gate 112 is provided so that it comes into contact with a button inside the second gate 109 and stops, and thereafter 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
As shown in FIG. 3, the starting cam 118 is resting on the high part of the starting cam 118, and then the starting cam 118 is rotated against the spring 112 via the operating lever 123, so that the roller 119 is stopped. falls from the high part of the starting cam 118 to the low part of the return cam 117, and when the drive shaft 33 rotates approximately half a turn from that state, the roller 119 climbs onto the high part of the return cam 117, and during this time the foot pedal is depressed. If it is released and the starting cam 118 is returned by the spring 122, the drive shaft 33 rotates further and the roller 119 comes off the high part of the return cam 117, and the roller 117 rides on the high part of the starting cam 118 again. climb.

(iii) Button supply device C This button supply device C is
Multiple buttons W similar to those shown in the publication
The excitation current of the excitation coil 126 is turned on through the bowl 125 containing the . 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.

Figures 7 and 8 are electrical circuit diagrams of this invention,
Each of these symbols will be explained below. SW
1 to SW8 are switches, and switch SW5
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. Switch SW
6 is always open, but is provided so that it is momentarily closed by a cam 130 just before the drive shaft 33 completes one revolution from the rest state shown in FIG. switch
SW7 is switched manually when sewing a two-hole button or a four-hole button, and the illustrated state is suitable for sewing a two-hole button. The switch SW8 is not shown in detail, but when the switch SW7 closes in connection with the completion of one stitching cycle of the sewing device A, it will be described later until the above-mentioned sewing cycle is completed twice if the switch SW7 is adapted to sewing four-hole buttons. Transistor-T
5, T6 and transistors T8 and T9 are prevented from conducting. C1-C8
is a capacitor, R1 to R4 are resistors, R5 and R6 are variable resistors, and each of these capacitors and each resistor C3-R1, C4-R2, C5-R
3, C6-R5, and C7-R4 determine their respective time constants. T1 to T10 and T14 are npn type transistors, and T1
1 to T13 are pnp type transistors.
D1 to D10 are diodes, Z1 to Z6 are Zener diodes, and S1 to S4 are thyristors. Further, 131 is a power transformer, 132 is a rectifier, and X, Y, and Z are terminals. Between the terminals , current is supplied to excitation solenoids SM, WM, and FM. In addition, capacitors C1 and C2 and a Zener diode Z1 are connected between terminals Y and Z.
Electric current is supplied to the control circuits of the sewing device A and the button loading device B by a known constant voltage circuit constructed by the above-described method. I to H are the primary input terminals of the power transformer 131;
B, C 220V, 200V, 115V, 100V, 0V in order
Serves as a connection terminal. Excitation coil 126
The excitation circuit is connected to the above input terminals D and E,
The AC voltage input to the power transformer 131 is
It is provided so that the voltage flowing through the variable resistor R6 and the exciting coil 126 does not change even if the voltage is changed from 200V shown in the figure to 220V or 100V.

This invention has the above configuration, and its operation will be explained next. First, when the power switch SW1 is turned on, the motor M rotates, and as a result, the pulley 5 of the sewing device A idles relative to the main shaft 3, and the gear 39 of the button carrying device B is rotated via the speed reduction device 63 to the rotary cam. Drive shaft 3 together with 34
3, the first swing lever 7
1, timing belt 72, shaft 67, belt 6
4, the rotating body 62 reciprocates in the lowered position shown in FIG. 5a so that it can engage the button W. In addition, a full-wave rectified and smoothed power supply current is input to the terminal
It is charged via SW3 and SW5.

Next, when switch SW4 (Fig. 8) is turned on, a different current is supplied to the exciting coil every half wave of the commercial frequency via variable resistor R6 and diode D11, and bowl 125 corresponds to the set resistance value of variable resistor R6. The buttons W vibrate with such force that the front-side up buttons W are sent out one after another into the flexible pipe 128, and the buttons W are sent out one after another to the flexible pipe 128, and then the buttons are transferred to the button carrying device B as shown in FIG. 5a.
The first preparation stage is completed.

When the push button 46 is pressed from this state to switch the switch SW2 from the state shown in FIG. (on, non-conducting turns off), thereby transistor T11
turns on. Therefore, transistors T8, T9
is turned on via diode D6 only for a time t2 determined by the time constants of resistor R4 and capacitor C7, and electromagnetic solenoid FM is energized. As a result, the unmachiya 47, the arm 48,
Since the starting lever 44 is rotated in the direction of the arrow in FIG. 3 via the shaft 45, the clutch 42 is engaged and the drive shaft 33 is rotated, and at the same time, after the elapse of time t2, the starting lever 44 is returned and the drive shaft 33 is rotated. After one revolution, the clutch 42 is disengaged and stops, and just before that, the switch SW6 is closed by the action of the cam 130, turning off the transistor T10, so that the thyristor S1 and the transistor T11 are turned off. When the drive shaft 33 rotates as described above, the vertical operating arm 75 engages the vertical cam 35 and the coil spring 7.
6 rotates upward via the third swing lever 77 and returns after being maintained at that position for t6 hours, so that the rotating body 62 is in a position where it cannot engage with the button W (FIG. 5b). Returns 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 shutter 9
2 moves from FIG. 5a to close the opening 91 as shown in FIG.
4 in the direction of the arrow in FIG. This causes the first gate 109 to pass through the shaft 104 to the fifth gate.
It rotates counterclockwise from the state shown in Figure a, and the bent end 109a comes out of the notch 89 as shown in Figure
The rod 111 is connected to the first gate 109 through the
Since the lower end engages with the upper surface of the button W2 at a time Δt3 before the bent end 109a comes out of the notch 89, the rotation of the vertical operating arm 75 clockwise in FIG. It slides down the guide passage 83 under its own weight and gets on top of the shutter 92 that is blocking the opening 91 first. Also, the rotating body 6
The shutter 92 closes the opening part 91 while the first swing lever 5 is raised.
1 is controlled by the feed cam 36, and the rotating arm 55
operates as described below while empty, and after the operation is completed, the vertical operating arm 75 returns against the coil spring 76. Next, contrary to the above, the rotating body 62
is lowered, and the rubber cap 61 comes into pressure contact with the button W1 shown in FIG. 5b, causing it to turn. Immediately thereafter (with a delay of Δt1), the shutter 92 retreats to the position shown in FIG. 5a, so that the sewing hole h
1 and h2 coincide with the support pins 60a and 60b, the button W1 is mounted horizontally on the mounting portion of the swing arm 55. Moreover, since the arm 105 rotates in the counterclockwise direction in FIG. 4 after Δt2 time after the rotating body 62 is returned by the long hole 107, the first gate 109 and the second gate 112 move from the state shown in FIG. 5b.
are rotated clockwise and counterclockwise, respectively, and return to the state shown in FIG. 5a, but the bent end 109a
Since the rod 111 separates from the button W2 Δt3 time after entering into the guide passage 83, the next button W2 is blocked by the bent end portion 109a.

Therefore, to first set the button W in the button holding jaw 13 of the sewing device A, press the push button 46.
must be operated 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, while the shutter 92 is blocking the opening 91, the next button W2 is sent out onto it and the switch is turned. The arm 55 reciprocates to carry the button set on 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 lines in FIG. , when the button W is pushed in the direction of the arrow, 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, the button W rotates in the direction of the arrow in the figure. As shown by the two-dot chain line, the holes h1 and h2 are biased in the opposite direction with respect to the passing points 01 and 02 of the needle 1, which causes a problem during suturing. Therefore, in the rotating arm 55 of the present invention, the support pins 60a and 60b are connected to the passing point 0 of the needle 1, as shown by the two-dot chain line in FIG. 9b.
1,02 and overrun by a distance equal to 1/2 of the dimensional difference between the diameters of the sewing holes h1, h2 and the diameters of the support pins 60a, 60b, as shown by the solid line in Fig. 9c. said passing point in the direction 01,0
2 and return by 1/2 of the above-mentioned dimensional difference, so the button W rotates slightly in the direction of the arrow in the figure, so that the centers of the sewing holes h1 and h2 approximately coincide with the passing points 01 and 02. Become. That is, when the support pins 60a and 60b move to the right from the state indicated by the two-dot chain line in FIG. 9b, the right side of the support pin 60b is in contact with the edge of the sewing hole h2, but the right side of the support pin 60a is Since the distance between the sewing holes h1 and h2 is 1/2 of the above-mentioned dimensional difference, the support pins 60a and 60
While b exceeds the passing points 01 and 02 and overruns 1/2 of the above-mentioned dimensional difference in the opposite direction, only one support pin 60b is in contact with the edge of the sewing hole h2, and the button W is held in the position shown in FIG. Rotate in the direction of arrow C. Subsequently, from that position, support pins 60a, 6
0b further moves to the left in FIG. 9 by a distance shorter than the dimensional difference (in the example, 1/2 of the dimensional difference), remains at that position for t7 hours, and then returns to its original position. While stationary for t7 hours, the return cam 117, interlocking rod 120, and shaft 11
6, the lifting lever 29 moves slightly clockwise in FIG. It is pulled out upward from the top, and all preparations before suturing are completed.

Next, place the material to be sewn on the fabric support, depress the foot pedal, and move the operating lever 123 from the state shown in FIG.
When the starting cam 118 is rotated clockwise against the spring 122 via the spring 27 and its high part is removed from the roller 119, the lifting lever 29, interlocking rod 120, and pressing lever 121 are moved by the spring 27 to rotate the shaft 116. 3 in the counterclockwise direction as shown in FIG. 3, the button holding jaw 13 descends and clamps the sewing material between its lower surface and the fabric support 12, and the switch SW3 changes from the state shown in FIG. 7. . As a result, the current charged in the capacitor C4 discharges and triggers the thyristor S2 via the Zener diode Z3 to turn it on.
The base current of transistor T1 is cut off, and the current that was previously flowing to transistor T1 via diode D3 flows into capacitor C8, triggering thyristor S3 and turning it on. Therefore, the transistors T2 and T3 are turned on, so the electromagnetic solenoid SW is energized, the clutch is engaged (the main shaft 3 and the pulley 5 are interlocked), the sewing device A is operated, and the button W held in the button holding jaw 13 is operated. Sewing to the object to be sewn. Also,
A cutoff lever 8 is moved in the direction in which the clutch is applied.
In conjunction with the operation of the link 129, the second
The switch SW5 rotates counterclockwise as shown in the figure.
When switching from the state shown in the figure, the potential at point P1 decreases and thyristor S3 turns off, but the potential at point P2 also decreases, and capacitor C5 becomes diode D4,
Since the transistor T12 is turned on by discharging through the switch SW5, the transistors T2 and T3 are not turned off, that is, the electromagnetic solenoid SM is activated until the clutch operates reliably at t1 due to the time constant of the capacitor C5 and the resistor R3. The timer remains on even if switch SW2 is switched.

After a predetermined number of stitches have been formed, the thread cutting mechanism is activated, and the cutoff lever 8 is returned to release the clutch.
When the sewing device A stops (because the linkage between the main shaft 3 and the pulley 5 is cut off), the lever 129 also returns and the switch SW5 becomes the state shown in Fig. 7 (the thyristor S3 is off), so the transistors T5 and T6 is 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 Figure 2, pulling out the cut end of the needle thread connected to the needle 1 onto the workpiece, as well as capacitor C6 and variable resistor. After a predetermined time has elapsed, the capacitor C6 is discharged via R5, which turns on the transistor T4 via the Zener diode Z4, turning off the transistors T5 and T6, and turning off 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 T8 and T9 are turned on via the switch SW7, so the electromagnetic solenoid FM is energized, and this causes the button loading device B to be activated in the same way as when the push button 46 is pressed. is activated, the sewn button W falls from the button holding jaw 13 due to its own weight, and then a new button W is carried into the button holding jaw 13, and the capacitor is discharged after time t2 via the capacitor C7 and resistor R4. This turns on the transistor T7 via the Zener diode Z4, turning off the transistors T8 and T9, thereby demagnetizing the electromagnetic solenoid FM. Further, just before the operation of the button carrying device B ends, in other words, when the drive shaft 33 rotates approximately one rotation, the switch SW6 is closed by the cam body 130, which turns off the transistor T10, so the thyristor S2 is turned off, and these The electromagnetic system stops 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 SW6 closes and the transistor T10 is turned off. As a result, the thyristor S1 is turned off, and therefore the transistor T11 is also turned off, and since the capacitor C3 is not charged at this time, the button loading device B only operates once and then stops.

Also, from the state shown in Fig. 7, switch SW3 is switched to operate sewing device A, and while it has not yet stopped, push button 46 is accidentally pressed and the switch is turned off.
Even if SW2 is switched from the state shown in Figure 7,
Thyristor S2 is turned on and the potential at point P3 becomes Z
The discharge current of capacitor C3 flows through diode D2 to point P3, and thyristor S1 is not triggered. Therefore, button loading device B is activated while sewing device A is activated. do not. This is the same even if the switch SW3 is switched from the state shown in FIG. 7 by accidentally depressing the foot pedal while the button carrying device B is operating. That is, since the thyristor S1 is on, the discharge current of the capacitor C4 does not flow to the gate of the thyristor S2, but flows to P4 via the diode D1.

As described above, in the present invention, a plurality of vertical pins are loosely fitted into the sewing holes to support the button, and a reciprocating carrier is used to move the pins loosely fitted into the pair of sewing holes to be sewn first into the sewing holes. After moving the needle by 1/2 the dimensional difference from the diameter of the sewing hole beyond the passing path of Because it moves a shorter distance than the button, even if the center of the sewing hole is biased in one direction with respect to the pin during the first forward movement of the carrier, the button will move in the opposite direction as the carrier moves in the opposite direction. The center of the sewing hole aligns with the passage of the needle due to the rotation of the button, and collision between the needle and button is avoided, which eliminates breakage, resulting in excellent economical efficiency and safety. Work efficiency is improved because there is no need to interrupt the work due to the needle thread rubbing against the edge of the sewing hole, and the formation of needle thread loops is inhibited, resulting in skipped stitches. This has the effect of producing high-value products with tightly sewn buttons.

In the embodiments of the present invention, a two-hole button has been described, but the same effect as described above can be obtained with a four-hole button.

[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, and FIG. 9 is an explanatory diagram of the button loading action. In addition, A in the figure is a sewing machine as a sewing device, and B is a sewing machine as a sewing device.
is a button carrying device, C is a button feeding device, 13,
13 is a set of button holding jaws, 55 is a rotating arm as a carrier, 60a, 60b are support pins, W is a button, h1, h2 are sewing holes, 36, 51, 5
Reference numerals 7, 58, 59, and 54 are feed cams and links interlocking with the feed cams constituting the control means.

Claims (1)

[Claims] 1. A set of button holding jaws that are horizontally spaced apart narrower than the diameter of the button and that always have elastic force in the direction in which they approach each other so as to sandwich and hold a button with multiple sewing holes from both sides. A button carrying device for correctly carrying a button opposite the vertical movement path of a needle into a sewing device that is started by manual operation and stopped when a predetermined number of stitches have been formed, which has a horizontal surface at one end. A horizontally supported button with a pair of pins that are thinner than the diameter of the sewing holes provided perpendicularly on the upper surface of the mounting part in correspondence with the sewing holes of the mounting part and the button is inserted from the outside of the button holding jaw. There is a carrying body that can reciprocate to the position where it is clamped and held, and a set of pins that are interlocked with the stop of the sewing device and loosely fit into the sewing hole to be sewn first. A control means for controlling the movement of the carrier so that the button moves forward in the carrying direction and then moves in the opposite direction by approximately 1/2 of the dimensional difference from the needle up and down movement path. A button loading device equipped with.