JPS5919709B2 - suturing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention, for example in a welt sewing machine or a dart sewing machine, uses a cloth transfer mechanism to move the workpiece fabric along the sewing machine table surface from a first position sandwiching the sewing machine sewing point to a second position. Regarding a sewing device that transfers the stitching to a sewing position and performs sewing machine stitching during the transfer to form a seam line of a scheduled length at a scheduled position on a cloth to be sewn, in particular, the sewing device When setting the fabric to be sewn, for example, use a marking lamp, etc. to indicate in advance the starting and ending positions of the sewing machine, and then match the starting and ending positions of the planned sewing position on the fabric to each of the indicated points above. By setting the fabric to be sewn in such a way, a seam of a predetermined size is formed at that position.

For example, while the fabric transfer mechanism moves the fabric that makes up the front body of the garment from the first position to the second position, a pocket hole is cut out (and at the same time, a bead-shaped hemline is placed in the pocket hole). In a welt sewing machine that is designed to sew, the fabric to be sewn must be set accurately in the planned position with respect to the fabric transfer mechanism. However, the pocket holes and border decorations cannot be formed accurately, resulting in errors in the sewing product, and garments with the left and right pockets misaligned, resulting in a significant decrease in the commercial value of the sewing product. .

Therefore, in the past, two marking lamps were used to set an indication point on the sewing machine table surface in front of the first position, that is, the sewing machine sewing point, to indicate in advance the starting and ending positions of the fabric to be sewn. A system has been devised in which the setting position relative to the fabric transfer mechanism is accurately determined by aligning the starting and ending positions of the scheduled stitches to be formed on the fabric with these indicated points.

However, in the conventional method described above, each time the length of the seam line changes, the mounting position of the marking lamp must be moved and adjusted to adjust the interval between the indicated points, and this adjustment process takes a considerable amount of time. In addition, if the adjustment is not performed accurately, the fabric to be sewn cannot be accurately set in the intended position with respect to the fabric transfer mechanism, resulting in the same drawbacks as described above.

In this invention, by inputting an arbitrary sewing dimension to a microcomputer through an input mechanism, an arithmetic circuit in the microcomputer performs an arithmetic operation according to a program.
The marking lamp is moved by driving an electrical actuator such as a pulse motor in accordance with the sewing dimension, and the interval between each indicated point is automatically adjusted to the interval corresponding to the sewing dimension. be.

Embodiments of the present invention will be described below with reference to the drawings.

The illustrated sewing device bends the hem fabric in an inverted T shape and overlaps it on the fabric to be sewn that makes up the front body of the garment, and then attaches the fabric to the hem fabric to the stitching point of the sewing machine. Transfer it from the first position to the second position, and during this transfer, perform two parallel sewing machine stitches from the bent ends of both sides of the hem fabric to the inside position to separate the fabric to be sewn and the hem fabric. At the same time as the pocket hole is sewn, a pocket hole is cut out between these two stitches, and an angled cut is made at both ends of the pocket hole at the second position.

This welt stitching machine consists of a sewing machine A placed in the middle of a sewing machine table 1, and a first position to a second position sandwiching the stitching point to the sewing machine along one surface of the sewing machine table for sewing the fabric to be sewn and the hem decoration fabric. a cloth transfer mechanism B for transferring the fabric to the cloth transfer mechanism B; and a folding mechanism that cooperates with the cloth transfer mechanism B at the first position to fold the hemline fabric into an inverted T-shape and overlap it with respect to the fabric to be sewn. C
, when the material to be sewn and the hem fabric are transferred to the second position,
It consists of a corner knife mechanism for making angular cuts at both ends of the pocket holes cut in the pocket holes, and a control device for controlling the sewing machine A and the mechanisms B, C, and D in a predetermined order.

The sewing machine A is a well-known two-needle sewing machine equipped with two needles 3, 3 arranged in parallel in the direction orthogonal to the cloth transfer direction at the lower end of the needle bar 2, and the needle plate ( A hook mechanism (not shown) for creating two parallel stitches by cooperating with these needles 3, 3 that have passed through the needle holes of the needles (not shown), and a hook mechanism (not shown) that connects the fabric to be sewn and the hook after the stitches are formed. A lower thread cutting mechanism for cutting the lower thread is disposed, and a slit (not shown) parallel to the cloth transfer direction is provided between each needle hole of the throat plate.

An operating knife 4 provided in an operating mechanism (not shown) disposed inside the sewing machine bed is retractably arranged in this slit, and the operating mechanism is operated by the sewing machine A as shown in FIG. When the operating lever 5 protruding from the right side is rotated to the operating position by the operation of the air cylinder a, it operates in conjunction with the sewing machine main shaft, and when the operating lever 5 is rotated to the non-operating position by the non-operation of the cylinder a, the sewing machine main shaft is rotated. The interlock with is cut off and it becomes inoperable.

Due to the operation of this operating mechanism, the operating knife 4 appears on and retracts from the throat plate surface through the slit, and connects the stitches between two parallel stitches formed on the fabric to be sewn and the hem fabric. Pocket holes are cut in parallel.

In addition, as shown in FIG. 1, in the sewing machine jaw at the rear of the needle bar 2, each upper part connected to the rear end of each stitch formed on the fabric to be sewn and the hem fabric and each needle 3, 3 is provided. A thread catcher 6 equipped with a pair of thread catcher hooks (not shown) for catching threads is disposed so as to be movable up and down, and a fixed knife 7 is mounted by pinching the thread catcher 6.
and a clamp spring 8 are fixedly disposed at the lower end of the sewing machine jaw in an overlapping state.

The thread grip 6 is reciprocated downward from the position shown in FIG. After capturing the threads, each upper thread is cut in cooperation with the fixed knife 7, and the crank spring 8
The cut ends connected from the 3 and 30 needle holes of each needle are clamped together.

Next, the cloth transfer mechanism B will be explained.

At the rear of the sewing machine A, a notch hole 9 is provided in one side of the sewing machine table along the cloth transfer path, and the table 1
A guide shaft 10 is disposed along the notch hole 9 on the lower surface of the guide shaft 10 by a pair of support frames 11, 11.

A pulse motor PM□ is supported on the support frame 11 on the rear side, and a screw shaft 12 is attached to the rotor of the pulse motor PM1, which is parallel to the guide shaft 10 and rotatably supported on the support frames 11, 11. A movable body 13 is provided with a screw hole (not shown) to be screwed into the guide shaft 10 and a guide hole (not shown) to be fitted into the guide shaft 10 is provided in the intermediate portion thereof, and the movable body 13 is attached to the guide shaft 10 by the rotation of the screw shaft 12. The rear ends of a pair of upper and lower plates 14 and 140 are fixed to the upper and lower sides of the moving body 13, which protrudes above the table surface, by screws 15° and 15, respectively. The movable body 13 is rotatably supported around a horizontal axis perpendicular to the transfer direction, and a protrusion 16a whose tip protrudes from the front end face of the movable body 13 is provided on the upper end surface of the movable body 13. A support frame 16 is provided with stopper portions isb and 16b protruding from both end faces.

Coil springs 17, 17 are arranged between the respective stopper portions 16b, 16b and the respective upper and lower plates 14, 14 to impart rotational force in the counterclockwise direction (FIG. 1) to each of the upper and lower plates 14, 14. As a result, the upper and lower plates 14, 14 are always pushed upward to a position where they engage with the lower ends of the stopper portions 16b, 16b.

As shown in FIG. 4, on the inner end surface of each of the upper and lower plates 14, 140, there is provided a support piece 1 that faces the lower surface of the protrusion 16a of the support frame 16.
8 and 1B, and a pair of air cylinders C for pressing down the respective branch pieces 18 and 18 onto the protrusion 16a.
, C are arranged, and by the operation of these cylinders C, C, each of the above-mentioned branch pieces 18 is activated by the plunger of cylinder C2C.
, 18 are pressed down, and each of the upper and lower plates 14, 14 is pressed down against the acting force of the coil springs 17 and 17.

As shown in FIGS. 2 and 4, each upper and lower plate 14, 140
At the tip, there is a presser plate 19, 19 for pinching the fabric to be sewn against one surface of the sewing machine table and for transferring the fabric along the table surface, the inner edge of each of which is larger than the distance between the needles 3 and 30. Protrusions 19a, 19 are arranged to face each other at wide intervals and are provided on the upper surface of the outer edge of each presser plate 19, 190.
In a, support plates 20 and 20 for the flaps (side lids of pockets) are placed so that their respective inner edges face the upper surface of the presser plate 19 and 19 at a constant distance vertically and with a downward slope. Fix it as shown.

Each branch piece 1B, 18 of each of the upper and lower plates 14, 14 is fitted at its tip end so that it can move in the horizontal direction perpendicular to the cloth transfer direction between the presser plate 19, 19 and the support plate 20, 20. a rotating plate 22 that supports the matched regulation plates 21, 21;
The rear ends of 22 are respectively vertical support shafts 22a.

It is rotatably supported by 22'a, and each rotating plate 2
Engagement pieces 23, 23 are provided on the upper surface of the intermediate portion of the upper and lower plates 14, 140, respectively.
Support frames 24, 24 are arranged opposite to 23, and each engagement piece 23
, 23 and the supporting frames 24, 24, respectively.
5 and 25 are applied to each rotating plate 22 and 22 to apply an acting force to each of the rotating plates 22 and 22 in a direction in which the regulating plates 21 and 21 at their respective tips are normally separated.

Each support frame 24, 24 has air cylinders d, d.
are arranged so that each plunger presses each engaging piece 23, 23 inwardly, and due to this suppressing action, each rotating plate 22, 22 rotates inwardly against the action of the coil spring 25, 25. The regulating plates 21, 21 are moved in the joining direction.

At the rear of the support plates 20 and 200, each horizontal portion 2
A T-shaped edge presser 26 with 6a and 26a as fabric pressers for pressing the edge decoration fabric onto the fabric to be sewn. A vertical portion 26b of 26.
, 26b can be rotated about a horizontal axis parallel to the cloth transfer direction with respect to the supports 27, 27 provided on the inner end surfaces of the upper and lower plates 14.
The distal end edge of each presser plate 26a is supported vertically in a position protruding further inward from the inner end edge of each presser plate 19.

And these edge pressers 26° 260 vertical parts 26b, 26
Support frames 2B, 2B, which are inclined inwardly upward facing the direction b, are arranged on each of the upper and lower plates 14, 14, and coil springs 29, 29 are installed between these support frames 28, 28 and each of the above-mentioned vertical parts 26b, 26b.
is applied to each edge presser 26, 26 so that the respective presser foot portions 26a, 26a are always opened upward, and each support frame 28, 28 is equipped with an air cylinder e, e. are arranged so that each plunger projects downwardly and presses the vertical portions 26b, 26b of the edge pressers 26, 26, and by this suppressing action, each edge presser 26, 2
6 is rotated inward against the action of the coil springs 29, 29, and the respective presser foot portions 26a, 26a are closed downward.

Further, the cloth presser portion 26a of each edge presser 26,26. 26a is provided with detection holes 30, 30 for detecting the dimensions of the flaps placed on the support plates 20, 20, and a tape 3L31 for reflecting light from these detection holes 30, 30.
is attached to the rear in the cloth transfer direction, and a light reflecting surface is provided on the upper surface of the presser plates 19, 19 at locations corresponding to the respective detection holes 30, 30.

Next, the folding mechanism C will be explained.

As shown in Figure 1.2.3, arm ffl of sewing machine A
[A support column 32 is fixedly arranged on the upper surface of the table 1 in proximity to the I side, and a support shaft 33 is supported vertically within this support column 32 with its upper half projecting upward from the upper end of the support column 32. A vertical portion of a support arm 34 formed in a ] shape is rotatably fitted and supported.

At the free end of the support arm 34 extending above the jaw of the sewing machine A, a vertical wall 34a is provided parallel to the cloth transfer direction, and a support frame 35 is arranged on the upper end surface, and an air motor AM is attached to the support frame 35. Deploy.

One end of a link 36 is fixed to the plunger of the air motor AM, and one end of an intermediate link 37 is rotatably connected to the other end of the link 36.

Further, a rotation shaft 38 is disposed horizontally penetrating the vertical wall 34a, and one end of a connecting link 39 is fixed to one end of the rotation shaft 38 protruding from the rear end surface of the vertical wall 34a. The other end of the intermediate link 37 is rotatably connected to the other end of the intermediate link 39.

The rotation shaft 38 protrudes from the front end surface of the vertical wall 34a.
One end of a connecting link 40 is fixed to the other end, and the upper end of the upper and lower body 41, which is formed in an inverted T shape and has a guide pin 41a protruding from the rear end surface, is rotated at the other end of the connecting link 40. Concatenate as possible.

A guide plate 42 provided with a guide groove 42a for guiding the guide pin 41a is arranged at the lower end of the front end surface of the vertical wall 34a, and the upper end of the support body 43 is attached to the leg on the near side of the lower end of the upper and lower body 41. An air cylinder f is supported on the front end surface of the support body 43 so that its plunger protrudes downward, and a long cloth presser is attached at the lower end of the support body 43 in an inverted T-shape along the cloth transfer direction. Fix the upper ends of the legs 44.

This presser foot 44 is configured such that when the upper and lower bodies 41 are lowered by the action described later, the lower end of the presser foot 44a is lowered onto the table 1 along the suture line passing through the counters 3, 3, and the The width of the holding portion 44a is slightly narrower than the distance between the inner edges of the folding plates 19.about.19 of the cloth transfer mechanism B.

On both end surfaces of the vertical portion 44b of the presser foot 44, a pair of support pieces 45, 45 are connected to each other by a pin 45a (FIG. 5A) passing through a longitudinally long notch 44c provided in the vertical portion 44b. One supporting piece 45 and the plunger of the air cylinder f are connected by a connecting piece 46.

At the lower end of one support piece 45, a plurality of needles 4T for holding the edge cloth are arranged at an angle downward to the left, as shown by solid lines in FIG. 1, and at the lower end of the other support piece 45, As shown by broken lines in FIG. 1, a plurality of needles 47' are similarly arranged at an angle downward to the right.

Each of these needles 47, 47' projects from the lower surface of the presser foot 44a through a through hole 44d (FIG. 5A) provided in the presser foot 44a of the presser foot 44 when the support pieces 45, 450 are lowered. It has become.

Further, an arm 48 extending in the horizontal direction is provided on the front end surface of the vertical wall 34a, and a support rail 49 is supported at the tip of the arm 48 in parallel to the cloth transfer direction.

This support rail 49 has two support pieces 50 and 51.
50 is fixed on the front side in the cloth transfer direction, and the other 50 is fixed on the front side in the cloth transfer direction.
1 is slidably supported on the rear side in the cloth transfer direction, and the support piece 51 has a sewing machine stitch to be sewn on the cloth to be sewn in order to position the cloth to be pressed by the cloth transfer mechanism B. A marking lamp 52 that projects an instruction mark M□ (FIG. 6) that indicates the initial position (i.e., the first needle drop position) on the table surface is mounted on the support piece 50 for sewing machine stitches to be sewn on the fabric to be sewn. Marking lamps 53 that project an instruction mark M2 for previously indicating the final position of the table on one surface of the table are respectively arranged.

A pulse motor PM2 is arranged on the upper surface of the arm 48, and a screw shaft 54 is connected to its rotor in parallel to the support rail 49, and the screw shaft 54 is screwed into a screw hole provided in the support piece 51. .

When the pulse motor PM2 rotates, the branch piece 51 slides on the support rail 49 via the screw shaft 54, and the marking lamp 52 moves to adjust the position of the indicator mark M1. There is.

As shown in FIG. 2, a guide rail 55 is disposed along the horizontal direction perpendicular to the cloth transfer direction on the front end surface of the vertical portion 34a of the support arm 34, and the guide rail 55
A horizontal part 56a of a sliding body 56 formed in a 5-shaped shape is supported so as to be slidable laterally along the rail 55, and an air cylinder g is disposed in front of the guide rail 55, and its plunger is It is connected to the rear end of the horizontal portion 56a of the sliding body 56.

The vertical portion 56b of the sliding body 56 has a vertical portion 5 on its front and rear end surfaces.
A pair of support pieces 5 connected to each other by two pins 57° 57 passing through a longitudinally long notch 56c provided in 6b.
8, 59 so as to be movable up and down, and on one support piece 58.
The vertical portions of the receiving plates 60 are connected to each other, and the plunger of an air cylinder h arranged vertically on the rear end surface of the vertical portion 56b of the sliding body 56 is connected to the upper end of the other support piece 59.

A receiving plate 61 is disposed on the upper surface of the horizontal portion of the receiving plate 60, and is provided with a relief groove 61a for each of the pricking needles 4γ, 47' at the center.

In addition, the support arm 34 is attached to the rear end surface of each of the support column 32 and the support arm 34, as shown by the solid line in FIG.
Locking pieces 62 and 63 are provided, each having locking holes that match vertically when the locking piece is placed in an operating position close to the front end surface of the locking member, and a locking pin 64 is inserted into the matching locking holes. .

The support arm 34 is locked at the solid line position by the locking pin 64, and when the locking pin 64 is removed, the lock is released and the support arm 34 is moved from the front end surface of the sewing machine A as shown by the two-dot chain line. It can be rotated to a remote, inactive position.

Furthermore, when the upper and lower bodies 41 are lowered, the legs on the rear side of the lower ends of the upper and lower bodies 41 are located near the sewing part of the sewing machine A, that is, the needle drop point, and are located at the edge pressers 26 and 2 of the cloth transfer mechanism B.
No. 6 cloth presser portion 26a.

A light emitting diode for irradiating light onto the path along which the cloth holder 26a moves, and a presser plate 19 via the tapes 31, 31 attached to the cloth holder 26a or the detection holes 30, 30.
, 19 are arranged. Sensors 65, 65 each consisting of a phototransistor are arranged to detect the light reflected from the light reflecting surfaces of the sensors 65, 19.

Next, the corner knife mechanism will be explained.

As shown in FIG. 1, the front supporting frame 11 disposed on the lower surface of the sewing machine table 1 has a cross section at the upper end below the path parallel to the cloth transfer direction passing through the operating path of the operating knife 4. The letter-shaped cutting blade 66a is fixed to a support frame 67 which vertically movably supports a female shaft 66 provided with a guide pin 66b projecting at right angles to the front side in the middle part. On the left side of the figure), there is a support frame 69 that supports vertically movably a female shaft 68, which has a cutting blade 68a shaped like a cross section at the upper end and a guide pin 68b which projects at right angles to the front side at the middle part. The female shaft 660 is slidably supported on the guide shaft 10, and one female shaft 660 has a guide groove γO in the cloth transfer direction.
One end (right end) of the female drive body 70 provided with the knife drive body 70 is fixed, and the guide pin 68b of the other female shaft 68 is loosely fitted into the guide groove 70a.

Then, a support piece γ1 is fixed to the lower end of the support frame 11, an air cylinder i is disposed on this support piece T1 facing upward, and its plunger is connected to the lower end of the female drive body 70.

An interlocking plate 72 is attached to the support frame 69 in a direction perpendicular to the cloth transfer direction.
At the same time, a locking plate 73 is also fixed to the lower end of the movable body 13 of the cloth transfer mechanism B in a direction perpendicular to the transfer direction, and an interlocking shaft 74 is fixed between the locking plate 13 and the interlocking plate 72.
An engaging piece 75 is provided at the front end (right end) of the interlocking shaft 74 that protrudes forward from the interlocking plate 72 so that the interlocking shaft 74 can be slidably supported in the cloth transfer direction. A coil spring 16 is passed between the rear end (left end) to always spring the interlocking shaft 74 forward, and in front of the interlocking shaft 74, the forward movement of the interlocking shaft 74 due to the elastic force is predetermined. A stopper 77 for locking at the position is disposed opposite to the engaging piece 75.

An air cylinder j is disposed on the locking plate 73, and a locking mechanism (not shown) for locking the locking plate 73 and the interlocking shaft 74 is provided on the plunger of this cylinder. Accordingly, the interlocking shaft 74 moves with the movement of the cloth transfer mechanism, that is, with the movement of the movable body 13.

Further, an air cylinder k for returning the support frame 69 to the front is arranged on the lower surface of the table 1, and its plunger is connected to the interlocking plate 72.

Therefore, the functions of each of the above mechanisms will be explained with reference to the control circuit block diagram shown in FIG. 9 and the time chart shown in FIG. 10.

In FIG. 9, MC surrounded by a broken line is a microcomputer equipped with various functions such as a memory control circuit including a microprocessor, various input/output registers, and memory.
Signals are input to the memory control circuit from various switches and control keys on the operation panel shown in FIG. 11, as well as from various microswitches placed in various parts of the device via each input register, and these signals are First of all, various control circuits and drive circuits are controlled and driven via each output register according to the program code stored in the memory in advance.

The length of the stitches to be formed on the fabric to be sewn and the edge decoration fabric is determined by the planned dimension (220 m) using the input key A located on the operation panel above.
) can be selected arbitrarily within the range of The needle is moved from the first position in front (right side in Fig. 1) to the second position (345M during this time) in the rear of the sewing point of sewing machine A shown by the solid line in Fig. 1.
A predetermined number of drive pulses generated from an oscillation circuit are inputted via a frequency dividing circuit.

In the sewing machine motor, the cloth transfer mechanism B is always the first one.
The stopping point is set at the time when the sewing machine moves 230 m from the position, and the starting point is controlled according to the selected sewing dimension.

In other words, if 180 mm is selected as the sewing dimension, the sewing machine motor is started when the cloth transfer mechanism B moves 50 rrrm from the first position, and the sewing machine motor starts 230 rrrm.
It is set to stop when it moves.

Furthermore, the frequency of the drive pulse input to the pulse motor PM The sewing machine motor is moved from the first position to the point where it is started, that is, in the above setting example, the sewing machine motor is moved 50 meters from the first position (section C in Fig. 10).
is a pulse motor P due to the frequency for driving at high speed.
Drive M1 to fast-forward cloth transfer mechanism B, and 5 rrrm at the beginning and end of machine stitch 0180rIrIrL.
(sections b and d in Fig. 10) are driven at a frequency for low speed driving to perform so-called safety stitches with a narrow stitch pitch, and 1 between each of these 5rrarL.
The 70 m sewing machine (section C in Figure 10) is driven at a medium speed, so it is driven at a frequency to form stitches with a normal pitch. at the frequency for driving the second position, i.e. 34
5. Fast forward to the oboro point (section C in Figure 10).

The above operation will be explained in more detail with reference to FIG.
When 180m is set by A, the arithmetic circuit in the memory control circuit derives 50rran as the starting point for sewing machine A, and the cloth transfer mechanism B is set to 50rran! Data indicating the number of pulses required to move rL is output register D.
At the same time, data instructing the frequency for high-speed driving is latched into the output register C, and the frequency of the drive pulse generated from the oscillation circuit is converted by the frequency dividing circuit to a frequency corresponding to the above data. The signal is input to the drive circuit of pulse motor PM1, and pulse motor PM is driven at high speed.

The drive pulses output from the frequency dividing circuit are counted by a counter, and when the number of pulses latched in the output register D is counted up, the count-up signal is inputted from the comparator circuit to the memory control circuit. The sewing machine start signal from the memory control circuit is latched into the output register E, and at the same time the sewing machine A is driven via the sewing machine motor control circuit, data indicating the number of pulses required to move the cloth transfer mechanism B by 5 meters is output to the output register. At the same time, data instructing the frequency for driving at a low speed is latched in the output register C, and a reset signal is input to the counter.

Therefore, the frequency of the drive pulse output from the frequency dividing circuit is converted, and the pulse motor PM1 is driven at a low speed.
When the above safety stitch is performed and the number of pulses latched in the output register D is counted up by the counter,
Based on the signal from the comparison circuit, output register D contains data instructing the number of pulses necessary to move cloth transfer mechanism B 170 times, and output register C contains data instructing the frequency for driving at medium speed. At the same time as each is latched, the counter is reset.

As a result, the pulse motor PM1 is driven at a medium speed,
Normal sewing is carried out until the counter counts up the pulses latched to the output register D, and by that count up, the number of pulses required to move the cloth transfer mechanism B by 5rIrrn is again instructed to the output register D. Data indicating the frequency for driving at a low speed is latched in the output register C, and safety stitching is performed again, and a count-up signal is output from the comparator circuit due to the count-up by the counter. At the same time that the sewing machine stop signal from the memory control circuit is latched to output register E and sewing machine A is stopped, data instructing the number of pulses required to move cloth transfer mechanism B by 115 steps is sent to output register C. The data instructing the frequency for driving the pulse motor PM1 at high speed are respectively latched, and the cloth transfer mechanism B is fast-forwarded to the second position, and when it moves to the second position, a count-up signal is output. Pulse motor PM1 stops.

Next, the order of operation of the air cylinders a to k and air motor AM arranged in each mechanism will be explained with reference to the time chart of FIG. 10, and the operation of each mechanism will be explained along with the explanation.

The microswitches shown in the control circuit diagram of FIG. 9 are the four microswitches (these are the switch box 79), and when the cloth transfer mechanism B moves further rearward (to the left in FIG. 1) from the second position due to some accident, the cloth transfer mechanism B is placed on the bottom surface of the movable body 13 of the cloth transfer mechanism B. Microswitch MS activated by switch suppression piece 80
W5, a microswitch MSW6 activated by the switch suppressing piece 80 immediately before the cloth transfer mechanism B returns to the first position, and a microswitch MSW7 activated simultaneously with the return to the first position, as shown in FIG. As shown, it consists of a microswitch MSW8 that is activated when the sliding body 56 returns to its original position, and a microswitch MSW9 that is activated when the corner knife mechanism shown in FIG. 1 is lowered.
Based on these signals, the memory control circuit outputs control signals to the solenoid valve control circuit to control each air cylinder.

First, in the initial state, the cloth transfer mechanism B is in the first position, and each of the upper and lower plates 14, 14 is connected to the coil springs 17, 17.
The presser plates 19, 19 are pushed to the upper position by the
As shown in the figure, it is rising from the first surface of the table.

Between the lower surface of each presser plate 19, 190 and the table surface,
For example, if the fabric W constituting the front body of the garment is inserted into a predetermined position and the pedal 78 is depressed to the first stage, the micro switch MSW in the switch box 79
1 is activated, the air cylinders c and c are activated, and the upper and lower plates 14 and 14 are lowered to press the presser plates 19 and 19 onto the fabric W to be sewn (FIG. 5A).

Next, when the edge decoration cloth P is placed in a predetermined position on the tray 61 of the folding mechanism C and the pedal 78 is depressed to the second step, the microswitch MSW2 is activated and the air cylinder g is activated. Then, the sliding body 56 is slid forward (to the left in FIG. 2), the air cylinder h is activated, the saucer 61 is moved upward, and the hemline cloth P is pressed against the cloth of the presser foot 44. It is pressed against the lower surface of the holding portion 44a.

Then, the air cylinder f is actuated and each support piece 45
, 45 are lowered, and the tips of the needles 47° and 47' protrude from the lower surface of the cloth presser portion 44a to pierce and hold the hemline cloth P. At the same time, the cylinder h becomes inoperable and the cylinder g is subsequently activated. As a result, the tray is lowered and at the same time the sliding body 56 returns to the rear (to the right in FIG. 2) (FIG. 5B).

Up to now, each operation of each cylinder has been performed based on a program preset in the memory and by signals from the memory control circuit.

Then, in response to a signal from the microswitch MSW8 activated by the return movement of the sliding body 56, the air motor AM is activated and rotated, and the rotation shaft 38 is rotated via the link 36, the intermediate link 37, and the connecting link 39. As a result, the upper and lower bodies 41 are lowered via the connecting link 40.

During the descent of the upper and lower bodies 41, the guide pins 41a are guided by the guide grooves 42a of the guide plate 420, and the upper and lower bodies 41 are guided backward (to the left in FIG. 1) while descending.
As the presser foot 44 lowers and moves backward, the rear end of the presser foot 44a moves rearward to a position near the sewing machine stitching point, and the inner edge of each presser plate 19 of the fabric transfer mechanism B. The edge decoration cloth P that has been lowered into the gap between the two and held on the lower surface of the presser foot 44a is, as shown in FIG. W
At the same time, the intermediate portion and both ends thereof are bent upward from between the inner edge of each presser plate 19 and the opposite edges of the presser plate 44a.

Simultaneously with the lowering of the presser foot 44, the air cylinders d, d are operated, and the rotating plates 22, 22 are moved inwardly through the engaging pieces 23, 23 against the action of the coil springs 25, 25. The regulating plates 21 and 21 supported at their tips move inward, and both ends of the hemline cloth P are bent upward, as shown by the two-dot chain line in FIG. 5C. As a result, the hemline cloth P is held in an inverted T-shape that surrounds the presser foot 44a of the presser foot 44.

Next, when the pedal 78 is depressed to the third step, the microswitch MSW3 is actuated to operate the air cylinders e, e, which causes the edge pressers 26, 26 to move against the action of the coil springs 29, 29. After being rotated inward and the respective presser foot portions 25a and 26a are lowered onto the respective regulating plates 21 and 21, as shown in the fifth figure, the cylinder f becomes inoperable and the respective support pieces 45, 45 rises, and the tip of each pricking needle 47, 47' pulls out the material W to be sewn.

Therefore, when the pedal 78 is depressed to the fourth step, the microswitch MSW4 is activated, and this signal drives the pulse motor PM1 at high speed, and the cloth transfer mechanism B is rapidly forwarded to the sewing machine starting point as described above.

By this movement of the cloth transfer mechanism B, the cloth to be sewn W is transferred to each folding plate 1.
9 and 19 on the table surface, the edge decoration fabric P is also moved together with the fabric to be sewn W while being kept in the above-mentioned folded state by each of the regulating plates 21 and 21 and each edge presser 26, 26. The presser foot 44 starts to pull out the material from the presser foot 44a.

Then, when the cloth transfer mechanism B reaches the starting position of the sewing machine A, the sewing machine A is driven and at the same time, the air cylinder j
is activated, and the movable body 13 is locked through the locking mechanism as described above.
The locking plate 73 and the interlocking shaft T4 provided in the cloth transfer mechanism B move rearward (to the left in Figure 1), and with this movement, the air cylinder k is compressed. .

In addition, the pulse motor PM1 is driven at a low speed to reduce the moving speed of the cloth transfer machine B, and as shown in FIG. Sewing is performed, and then the rotational speed of the pulse motor PM is increased to a medium speed to start normal sewing, and at the same time the air cylinder a is operated, thereby rotating the operating lever 5 to the operating position. The operating knife 4 is operated in conjunction with the main shaft of the sewing machine, and moves up and down between each needle 3 and 30.
A pocket hole X is cut in the center of the fabric to be sewn W and the edge decoration fabric P, and during this sewing, the engagement piece T5 at the tip of the interlocking shaft 74, which is moving together with the fabric transfer mechanism B, is movable by the corner knife mechanism. The movable support frame 69 is engaged with the interlocking plate T2 of the support frame 69, and as a result, the movable support frame 69 slides backward on the guide shaft 10 as the interlocking shaft 74 moves, and the female shaft 68 supported on the movable support frame 69 The guide pin 68b also moves rearward within the guide groove 70a of the female drive body TO.

In this case, the set sewing dimension is the above setting value 180.
ran, for example, when the sewing machine start time is set to 80 m, the cloth transfer mechanism B is set to 100 rr.
r! There will be a delay by the amount of movement rL, and therefore, the operation timing of the air cylinder j will also be delayed, and by the time the engaging piece 75 of the interlocking shaft 74 engages with the interlocking plate 72 of the movable support frame 69, the sewing machine sewing will be completed. This will occur during fast forwarding of cloth transfer mechanism B, which will be described later.

When the above normal wire opening is completed, pulse motor PM□
is driven at a low speed to perform safety stitching, the cylinder a becomes inactive, and the operating knife 4 stops below the throat plate, thereby sewing the workpiece W and the hemline fabric P. Two parallel seams 2 are formed, and a pocket hole X having a size slightly shorter than both ends of both seams is formed between the seams.

Simultaneously with the completion of the sewing, the sewing machine A stops in response to a count-up signal output from the comparator circuit, and then the pulse motor PM1 is driven at high speed to move the cloth transfer mechanism B to the second position. At the same time, the air cylinder b is temporarily activated to reciprocate the thread catcher 6 downward, and the thread catcher hooks remove the dowels 3, 3, The upper thread connected to needle 3.3 is caught and cut between it and fixed knife 7, and the cut end, which also connects to needle 3.3, is clamped between clamp spring 8, and at the same time, placed on the sewing machine bed. The bobbin thread cutting mechanism (not shown) is also activated to cut the bobbin thread connected to the hook from the fabric W to be sewn.

Therefore, at the same time that the cloth transfer mechanism B reaches the second position, the pulse motor PM1 is stopped in response to the count-up signal output from the comparison circuit, and at this time, the movable support frame 69 is moved to its female shaft 68. The cutting blade 68a of the female shaft 66 of the fixed support frame 67 is inserted into the pocket hole
At the same time, both ends of the pocket hole X formed in the center of the sewing material W and the edge decoration material P come to rest at a point corresponding to the dimensions of the sewing material W and the edge decoration material P, respectively.
a, 68a.

Then, based on the count-up signal mentioned above, the air
The cylinder i is actuated and the knife drive body 70 is moved upward, and accordingly, each knife shaft 66.6B is moved upward, and the respective cutting blades 66a and 68a also protrude upward from the notch hole 9 of the table 1. Triangular incisions Y, Y are formed in the fabric to be sewn W and the edge decoration fabric P at both ends of the pocket hole X, extending over each end and each end of each seam.

Immediately after the notches Y and Y are formed, the cylinder i becomes inactive and the knife drive body γ0 descends, which activates the micro switch MSW9, and in response to that signal, the cylinders c, d, e , j and air motor A
M becomes inactive, and each upper and lower plate 14°14 of cloth transfer mechanism B
are rotated upward by the action of the coil springs 17, 17, and the pressure on the fabric W to be sewn by each presser plate 19, 19 is released, and each rotating plate 22, 22 is moved in the separating direction by the action of the coil springs 25, 25. each regulation plate 21
, 21 are separated from the edge decoration cloth P, and each edge presser 26, 26 is also rotated upward by the action of the coil spring 29, 29, and the lock plate 73 and interlocking shaft 740 are unlocked, and the compressed The movable support frame 69 of the corner knife mechanism is moved back forward by the action of the air cylinder, and further,
The presser foot 44 of the folding mechanism C is raised.

Further, in response to the operation of the micro switch MSW9, the pulse motor PM1 is rotated at high speed in the opposite direction to the above, and the cloth transfer mechanism B is returned from the second position to the first position in rapid forward movement. Immediately before returning to the first position, the microswitch MSW6 is activated by the switch suppressing piece 80 to reduce the rotational speed of the pulse motor PM10, and at the same time as returning to the first position, the microswitch MSW7
is activated and the pulse motor PM1 is stopped.

If an accident such as thread breakage or needle breakage occurs during the sewing process, pressing the emergency stop switch ASW located on the operation panel will stop the pulse motor PM1.
and the sewing machine motor is stopped.

Therefore, if you press the reverse rotation switch BSW, the pulse motor P
M1 is rotated in the opposite direction with the number of pulses necessary to move the cloth transfer mechanism B by 5 rran.
is moved in the opposite direction by 5rIw4 minutes, and when the reset switch R8W is pressed, the pulse motor PM1 is rotated in the forward direction again and the sewing machine motor is driven, starting from the position 5# back from the end of the interrupted stitch. Stitch formation continues again.

In this case, the number of pulses required for reversing the pulse motor PM1 is added to the output register D.
Therefore, the dimensions of the finally formed stitches are as planned.

Furthermore, when the idle switch ESW on the operation panel is turned ON, the pulse motor PM is input, and as a result, the cloth presser portion at the tip of the cloth transfer mechanism B is separated rearward from the upper position of the corner knife mechanism, for example, each knife shaft 66.
68 cutting blade 66a.

It is possible to easily replace 68a and repair a malfunction of the corner knife mechanism.

Next, an instruction mechanism for positioning the cloth W to be sewn will be explained.

If 180rrvn is set as the desired sewing size using the input key A on the operation panel as in the setting example above, after the setting operation, if you press the start switch FSW arranged on the operation panel, the pulse motor PM2 will be activated in one direction. The movable support piece 51 is moved backward (upwards 9 in FIG. 3).

Therefore, this branch piece 51 is separated from the fixed branch piece 53 by, for example, two
A microswitch MSW10 is arranged that is activated by a branch 51 when the distance is 20 mm, and when the microswitch MSW10 is activated, each marking lamp 52 and 53 projects an instruction mark M12M20 interval on the table surface based on the signal. Data indicating the number of pulses necessary to move the movable branch 51 to a position where the distance is 180 m is latched in the output register A, and the counter control circuit receives the drive pulses output from the oscillation circuit into its output register. The AND gate is opened and the drive pulses are input to the drive circuit until the number of pulses latched in A is counted up, and thereby the pulse motor P
M2 is rotated in the opposite direction to the above and each of the above instruction marks M
Move the movable support piece 51 to the position where the interval of 12M2 is 180m.
is moved on the support rail 49.

Then, the tip position (sewing start position) and the rear end (sewing end position) of the planned stitch location on which the sewing material W is to be formed are placed on the instruction marks M□ and M2 projected by the marking lamps 52 and 53, respectively. If the presser plates 19, 19 of the cloth transfer mechanism B are lowered and pressed as described above, a stitch will be formed at the predetermined position.

In addition, when sewing flap cloths F, which serve as the difference between the pockets, to the cloth W to be sewn and the edge decoration cloth, as shown in FIG. 12, the flap cloths F
may be placed on one of the support plates 20 and the edge pressers 26, 26 may be opened.

In this case, set the input key A located on the operation panel to correspond to flap stitching.For example, to perform left flap sewing, press the key rNJ and "7", and to perform right flap sewing, press the key "N". When "" and "18" are pressed, the sewing machine A is started immediately after the sensors 65, 65 disposed in the folding mechanism C detect the leading edge of the flap cloth F.

That is, when the edge presser 26.26 is closed, the detection hole 30°30 provided in the edge presser 26.26 also opens the flap cloth F.
As the cloth transfer mechanism B moves, the light from the light emitting diode of each sensor 65, 65 comes to illuminate along the upper surface of each edge presser 26, 26. .

Then, the light is reflected by the tape 31, 31 and the reflective surfaces of the holding plates 19, 190 exposed from the detection holes 30, 30 until the tip of the flap cloth F reaches the sewing point.
While the phototransistor receives this reflected light, only the cloth transfer mechanism B is fast-forwarded.

Therefore, when the tip of the flap cloth F reaches the sewing point,
The flap cloth F blocks the reflection of the light, and the cutoff signal is input to the memory control circuit to output a starting signal for the sewing machine A, thereby driving the sewing machine A.

In this case, the stop signal for the sewing machine A is, similarly to the above, based on the count-up signal that is output when the cloth transfer mechanism B has moved by 230 rrrm.

As described above, the present invention is capable of clamping the fabric to be sewn against the sewing machine table surface and moving the fabric along the sewing machine table surface between the first position and the second position sandwiching the sewing machine sewing point. The sewing machine is equipped with a cloth transfer mechanism that drives and stops the sewing machine during movement from the first position to the second position, and performs machine stitching of a predetermined size at a predetermined position on the fabric to be sewn. In a suturing device that is provided with an instruction means for instructing in advance the starting and ending positions of sewing machine stitches when setting the cloth to be sewn in the transfer mechanism, the sewing device is provided with a selection means that makes it possible to select an arbitrary sewing size, In order to make this selection, the microcomputer outputs a command signal for driving the sewing machine and a command signal for stopping the sewing machine at a time suitable for forming the above-mentioned sewing dimensions, and performs the above-mentioned scheduled sewing dimensions. In addition, one or both of the indicating means is moved by an electric actuator such as a pulse motor in accordance with the selected sewing dimension, and the intervals between the points indicated by each indicating means are set at intervals corresponding to the sewing dimension. Since the adjustment is made automatically, when setting the fabric to be sewn in the fabric transfer mechanism, by aligning the beginning and end positions of the planned sewing area on the fabric to each indicated point, the sewing area will be sewn to the intended sewing area. It is possible to sew the planned dimensions accurately, and if a desired sewing dimension is selected, the above-mentioned instruction points will automatically be set at intervals corresponding to that sewing dimension, so the instruction means will be adjusted each time the sewing dimension changes. The effort of adjusting the position can be saved, and therefore the sewing work efficiency can be significantly improved.

[Brief explanation of the drawing]

Figure 1 is a left side view of the entire device, Figure 2 is a front view of the sewing machine and cloth folding mechanism, Figure 3 is its top view, and Figure 4 is the cloth presser foot of the cloth transfer mechanism divided in the middle. A top view, FIG. 5 is an explanatory diagram showing the cooperation between the cloth presser part of the cloth transfer mechanism and the cloth folding mechanism, FIG. 6 is an explanatory diagram showing the relationship between the positioning instruction mark and the cloth to be sewn, and FIG. The figure is an explanatory diagram showing the state of the seams and pocket holes formed in the fabric to be sewn and the edge decoration fabric.
The figure is an explanatory diagram showing the state of the border decoration of the pocket hole after the seam and the pocket hole are completed and the border decoration cloth is turned over through the pocket hole. Figure 9 is a control circuit block diagram. Figure 10 is each operating mechanism. FIG. 11 is a front view of the operation panel, and FIG. 12 is an explanatory diagram showing the state of cooperation between the cloth presser portion of the cloth transfer mechanism and the cloth folding mechanism when sewing a flap cloth.

Claims (1)

[Scope of Claims] 1. A first position and a second position which are separated in the sewing direction by sandwiching and pressing the fabric to be sewn against the sewing machine table surface, sandwiching the sewing machine sewing point along the sewing machine table surface with the fabric to be sewn, It has a fabric transfer mechanism that can move between the first and second positions, and drives or stops the sewing machine during movement from the first position to the second position to form a seam line of a predetermined length at a predetermined position on the fabric to be sewn. At this sewing position, a pulse motor (PMI) connected to move the cloth transfer mechanism from the first position to the second position and the length of the seam line to be formed on the cloth to be sewn are arbitrarily selected. A selection means that can be set and an index for positioning the fabric to be sewn to the fabric transfer mechanism can be indicated on the table surface so that the sewing machine stitches the length set by the selection means at the planned position of the fabric to be sewn. two indicators 52 and 53, at least one of which is disposed on the sewing machine frame or sewing machine table so as to be displaceable in the sewing direction; and an electric actuator (2M2) connected to displace the displaceable indicator; A pulse motor is driven with the necessary number of pulses to move the cloth transfer mechanism from the first position to the second position in response to the sewing length set by the control and selection means. A second control that drives the actuator so that the indicators on the indicator indicate the start and end positions of the sewing machine, and a third control that drives or stops the sewing machine so that a seam line is formed between the positions indicated by both indicators. a first drive circuit that drives the pulse motor based on a first control program of the microcomputer, and a second drive circuit that drives an actuator based on a second control program of the microcomputer. A suturing device comprising two drive circuits and a third drive circuit that drives a sewing machine motor based on a second control program of a microcomputer.