JPH07102263B2 - sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention can selectively perform processing such as cutting and welding other than sewing on a processed sheet such as a work cloth. This is about the sewing machine.

(Problems to be Solved by the Invention) The present invention is configured to utilize a driving force of a driving means for raising and lowering a needle bar during sewing to lower a machining head and hold the machining head at the lowered position. However, it is an object of the present invention to provide a sewing machine capable of simplifying the structure and selectively performing sewing and processing other than the sewing.

Configuration of the Invention (Means for Solving Problems) The present invention has been made by paying attention to the above problems, and includes a support case supported laterally movably at an end of a sewing machine arm. , A processing head that is vertically supported by the support case and has a needle at the lower end and a processing tool for performing processing other than sewing at the lower end, and for driving the needle bar and the processing head In addition, the driving means provided at the sewing machine arm and the driving means, the needle bar and the machining head provided between the driving means and the needle bar and the machining head are provided between the driving means and the needle bar and the machining head. The needle bar is continuously moved up and down when the drive means and the needle bar are connected, and the processing head is lowered when the drive means and the processing head are connected. Fall In a sewing machine having a control means for controlling the operation of the driving means so that the driving means is held in place, the sewing machine spindle controlled by the control means and constituting the driving means is parallel to the needle bar and the machining head. And a rotary shaft that is rotationally controlled by the control means, and is externally fitted to the rotary shaft so as to be vertically movable, and is operatively connected to the sewing machine main shaft to be connected to the rotary shaft based on the rotation of the sewing machine main shaft. An actuating body that moves up and down with respect to each other, and a moving unit that laterally moves the support case with the rotation of the rotating shaft,
The needle bars and the machining heads are provided so that only the needle bar or the machining head corresponding to the actuation body engages with the actuation body and moves up and down integrally with the actuation body as the support case moves laterally. And a connecting member forming the connecting means.

(Operation) Therefore, in the sewing machine of the present invention, when the needle bar and the drive means are connected together with the movement of the support case, the needle bar is continuously moved up and down by the drive means to form a work sheet such as a work cloth. When sewing is performed and the processing head and the driving means are connected, the processing head is lowered by the driving means and is held at the lowered position, and for example, cutting or welding other than sewing is performed on the processing sheet. Etc. are processed. In particular, in the present invention, the rotation shaft that is rotated for lateral movement of the support case is used as a guide for vertically moving a desired needle bar or machining head, so that the configuration can be simplified. Along with this, it can contribute to downsizing of the sewing machine.

(Embodiment) An embodiment of a sewing machine embodying the present invention will be described in detail below with reference to the drawings.

In this embodiment, as shown in FIG. 1, the sewing machine main shaft 2 constituting the driving means is supported in the sewing machine arm 1 and is rotationally driven by the motor 3 shown in FIG. One rotating shaft 4 is supported at the end of the sewing machine arm 1.
A pair of actuating members 5, 6 having connecting grooves 5a, 6a at their front edges are fitted on the rotary shaft 4 so as to be vertically movable. Then, with the rotation of the sewing machine main shaft 2, the lower operating body 5 is moved up and down via the crank mechanism 7, and the upper operating body 6 is moved up and down via the gear mechanism 8 and another crank mechanism 9 at different timings. It is supposed to be moved.

A support case 11 is supported by an end of the sewing machine arm 1 via a guide rail 12 so as to be laterally movable. A moving motor 13 is installed on the upper part of the sewing machine arm 1.
With the rotation of 13, the support case 11 is laterally moved through the pinion 14 on the motor shaft, the pinions 15 at both ends of the rotary shaft 4, and the rack 16 on the support case 11 side. The pinion 15 and the rack 16 constitute a moving means.

As shown in FIGS. 1 to 3, five needle bars 17 and one support bar 18 are arranged in the support case 11 so as to be vertically movable at equal intervals in the moving direction of the support case 11. Supported, each needle bar
A needle 19 is attached to the lower end of 17. An ultrasonic head 20 as a processing head is supported on the front part of the support rod 18, and a processing horn 21 at the lower end thereof has a cutting tool 22a having an oblique cutting part 22a at the lower end as shown in FIG. 22 or, as shown in FIG. 5, a heating welding tool 23 having a planar pressing portion 23a at the lower end is selectively attached by screws 24.

As shown in FIGS. 1 and 3, the needle bar 17 and the support bar
A connecting pin 25 serving as a connecting member is fixed on 18 and engages with a long hole 26 formed in the rear surface of the support case 11 so that each rod 17, 1
The rotation of 8 is restricted. The connecting pin 25 and the connecting groove 5a of the lower operating body 5 constitute a connecting means, and any one of the connecting pins 25 engages with the connecting groove 5a along with the movement of the support case 11, and the sewing machine Spindle 2 and 5 needle bars
17 and one support bar 18 are sequentially and selectively operatively connected. Further, a balance 27 is inserted on the needle bar 17 so as to be movable in the vertical direction, and a connecting pin is provided on the rear surface thereof.
28 is projected. With the movement of the support case 11, any one of the connecting pins 28 is engaged with the connecting groove 6a of the upper operating body 6 so that the sewing machine main shaft 2 and the balance 27 are sequentially and selectively operated and connected. ing.

As shown in FIGS. 1 to 3, the needle bar 17 and the support bar 18 are provided.
A presser foot 29 is supported on the. Then, the presser foot 29 is always raised and lowered integrally with the rods 17 and 18 while being engaged with the connecting pin 25 by the action of the spring 30, and the presser foot 29 is described later by a chain line in FIG. After being lowered to the lowered position on the needle plate, only the lowering of the needle bar 17 or the support bar 18 is allowed.

As shown in FIGS. 1 and 2, a thread tensioner 31 and a thread hooking body 32 are provided on the front surface of the support case 11 corresponding to each needle bar 17. Then, from a thread supply source (not shown) provided on the upper part of the sewing machine arm 1, sewing threads Y of different colors are
Is supplied to the needle 19 via each thread tensioner 31, the balance 27 and the thread hook 32, and along with the continuous raising and lowering operation of the selected needle bar 17, a thread catcher (not shown) in the sewing machine bed 33 and the needle 19 are shown. In cooperation with the work sheet W such as work cloth, the predetermined sewing thread Y
It is supposed to be sewn at.

At the lower end of the sewing machine arm 1, the sewing machine bed
Two types of needles 34 and 35 are selectively attached to the 33 by screws 36. One of the needle plates 34 is used when the cutting tool 22 is attached to the processing horn 21 as shown in FIGS. 1 and 4, and the needle hole 34a for the needle 19 and the cutting tool 22 are used. A cutting hole 34b for cutting is provided. The other needle plate 35 is the fifth
As shown in the figure, it is used when the heating welding tool 23 is attached to the processing horn 21, and has only the needle hole 35a for the needle 19. When the support rod 18 is connected to the sewing machine main shaft 2 with the movement of the support case 11, the ultrasonic head 20 is lowered by the main shaft 2 through the support rod 18 and is held in the lowered position. Then, the processing horn 21 of the ultrasonic head 20 is vibrated, and the processing sheet W is cut or heat-welded by the tools 22 and 23.

Next, the sixth control circuit of the sewing machine configured as described above is used.
Explaining with reference to the drawing, a read-on memory (ROM) 42 and a random access memory (RAM) 43 are connected to a central processing unit (CPU) 41 which constitutes a control means. ROM42
A program for controlling the operation of the entire sewing machine is stored in the RAM 43, and various processing data regarding sewing, cutting, and heat welding are stored in the RAM 43.

The CPU 41 is provided in the sewing machine arm 1 to detect the movement position of the changeover switch 44 for switching the sewing, cutting and heat welding processing modes, the operation pedal 45 for starting and stopping, and the support case 11. Moving position sensor 46 and needle
A needle position sensor 47 provided in the sewing machine arm 1 corresponding to the sewing machine main shaft 2 for detecting the vertical position of 19 or the like is connected via an input interface 48. Further, in the CPU 41, the motor 3 for the sewing machine spindle 2, the oscillator 49 for operating the ultrasonic head 20 and the motor 13 for moving the support case are passed through the output interface 50 and the drive circuits 51, 52, 53. Connected.

Then, when the changeover switch 44 is switched to the sewing mode, the CPU 41 causes the sewing machine main shaft 2 to move against the motor 3.
Drive signal for continuously rotating the sewing machine in one direction, and when the changeover switch 44 is switched to the cutting and heating welding mode, the sewing machine main shaft 2 is moved to the motor 3 based on the detection signal of the needle position sensor 47. A drive signal for half rotation from the position to the needle down position or from the needle down position to the needle up position is output. Further, when the changeover switch 44 is switched to the disconnection mode, the CPU 41 causes the transmitter 49 to generate a drive signal for vibrating the processing horn 21 of the ultrasonic head 20 at a low frequency with a large stroke S1 shown in FIG. When the changeover switch 44 is switched to the heating and welding mode, a drive signal for vibrating the processing horn 21 of the ultrasonic head 20 at a high frequency with a small stroke S2 shown in FIG. 5 is output to the oscillator 49. Output.

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

First, when sewing a work sheet W such as a work cloth by this sewing machine, when a predetermined sewing mode is selected by the changeover switch 44, corresponding sewing data is read from the RAM 43 to the CPU 41. Thereafter, when the operation pedal 45 is operated, the moving motor 13 is driven based on the sewing data to laterally move the support case 11, and the predetermined needle bar 17 is moved through the connecting pin 25 and the lower operating body 5 to the sewing machine main shaft 2 The balance 27 on the needle bar 17 is operatively connected to the sewing machine main shaft 2 via the connecting pin 28 and the upper operating body 6.

In this state, the sewing machine main shaft 2 is continuously rotated in one direction by the rotation of the motor 3 based on the drive signal from the CPU 41, and the needle bar 17 and the balance 27 are respectively moved up and down via the crank mechanisms 7, 9 and the like. Based on the sewing data, the work sheet W is arbitrarily moved along the work piece supporting surface of the needle plates 34, 35 by a moving device (not shown), and is processed by the cooperation of the needle at the lower end of the needle bar 17 and the thread catcher. Sewing is performed on the seat W. Then, the sewing thread Y used in the sewing data
Whenever the data of the above is changed, the supporting case 11 is moved by the driving of the moving motor 13, the corresponding needle bar 17 is selected and connected to the sewing machine main shaft 2, and the sewing operation is performed in the same manner as described above. Be seen.

Next, when cutting the processing sheet W in this sewing machine, as shown in FIGS. 1 to 4, the processing horn 21 is used.
Attach the cutting tool 22 to the sewing machine, and attach the cutting needle plate 34 on the sewing machine bed 33.
When is set to the disconnection mode, the corresponding disconnection data is read from the RAM 43 to the CPU 41. After that, when the operation pedal 45 is operated, the moving motor 13 is driven based on the cutting data, the supporting case 11 is laterally moved, and the ultrasonic head 20 is moved.
A supporting rod 18 supporting the above is operatively connected to the sewing machine main shaft 5 via a connecting pin 25 and a lower operating pair 5.

In this state, the sewing machine main spindle 2 is half-turned from the needle up position to the needle down position by the rotation of the motor 3 based on the drive signal from the CPU 41, and the ultrasonic head 20 is lowered through the crank mechanism 7 and the like. Held in position. Then CPU41
The horn 21 for processing of the ultrasonic head 20 is vibrated at a low frequency with a large stroke S1 shown in FIG. 4 by the operation of the oscillator 49 on the basis of the drive signal from The processed sheet is arbitrarily moved, and the processed sheet W is cut by the cooperation of the cutting portion 22a of the cutting tool 22 and the cutting hole 34b of the needle plate 34.

Further, when the work sheet W is processed and welded in this sewing machine, as shown in FIG. 5, the heating welding tool 23 is mounted on the processing horn 21 and the sewing machine head 33 is used.
Attach the needle plate 35 for welding on top, and in this state the changeover switch
When 44 is set to heat welding mode, RAM43 to CPU
Corresponding to 41, the heat welding data is read. After that, when the operation pedal 45 is operated, the support rod 18 of the ultrasonic head 20 is operatively connected to the sewing machine spindle 5 as the support case 11 moves based on the rotation of the moving motor 13 as in the case of setting the cutting mode. It

Then, in this state, as in the cutting operation, the motor 3
Rotation of the sewing machine causes the sewing machine main shaft 2 to make a half rotation, and the ultrasonic head 20 is lowered and held at the lowered position. afterwards,
By the operation of the oscillator 49 based on the drive signal from the CPU 41,
The descending horn 21 of the ultrasonic head 20 is vibrated at a high frequency with a small stroke S2 shown in FIG. 5, and the work sheet W is arbitrarily moved by the operation of the moving device based on the heat welding data, and heat welding is performed. Pressing part 23a of the tool 23
Thus, the processed sheet W is heat-welded.

The present invention is not limited to the configuration of the above-described embodiment. For example, a laser beam generator or a heat generating device is provided as a processing head, and these devices perform processing other than sewing such as cutting and heat welding on the processed sheet. It is also possible to embody the present invention by arbitrarily changing the configuration of each part without departing from the spirit of the present invention.

Effect of the Invention As described in detail above, the present invention is configured to lower the machining head and hold it in the lowered position by utilizing the driving force of the driving means for raising and lowering the needle bar during sewing. Further, it is not necessary to separately provide a special driving means for holding the processing head down, and the structure can be simplified.
Further, since the rotation shaft that is rotated for lateral movement of the support case is used as a guide for vertically moving a desired needle bar or machining head, the structure can be simplified and the sewing machine can be downsized. Can contribute to.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of a sewing machine embodying the present invention, FIG. 2 is a partial front view showing the sewing machine in a reduced scale, and FIG. 3 is an exploded view of a connecting structure of ultrasonic heads. Partial sectional view shown, FIG. 4 is a partially enlarged sectional view showing a mounting state of a cutting tool and a needle plate, FIG. 5 is a partially enlarged sectional view showing a mounting state of a tool for heating welding and a needle plate, FIG. FIG. 3 is a block diagram showing a control circuit of this sewing machine. DESCRIPTION OF SYMBOLS 1 ... Sewing machine arm, 2 ... Sewing machine main shaft that constitutes drive means, 4 ... Rotary shaft, 5 ... Lower actuation body as actuation body, 5a ... Connection groove that constitutes connection means, 11 ... Support case , 15, 16 ... Pinion and rack constituting moving means, 17 ... Needle bar, 19 ... Needle, 20 ... Ultrasonic head as machining head, 22 ... Cutting tool as machining tool, 23
...... Processing heat welding tool as a processing tool, 25 ...... Connecting pin as a connecting member that constitutes the connecting means, 41 ...... CPU that constitutes the control means.

(72) Inventor Koji Hayashi 9-35 Hotta-dori, Mizuho-ku, Nagoya, Aichi Prefecture Brother Industries, Ltd. (72) Inventor Miho Hashimoto 9-35 Hotta-dori, Mizuho-ku, Aichi Prefecture Brother Industries, Ltd. In-house (56) References JP 61-25591 (JP, A) JP 55-158369 (JP, A) JP 51-68347 (JP, A) Actual development JP 49-23161 (JP, U) ) JP-B 55-2992 (JP, B2) JP-B 1-60585 (JP, B2) JP-B 5-66840 (JP, B2) JP-B 5-66839 (JP, B2) JP-B 5- 66838 (JP, B2) JP-B 5-66837 (JP, B2) JP-B 58-30203 (JP, B2) JP-B 59-29988 (JP, Y2) JP-B 55-28793 (JP, Y2) Actual Kohei 6-16606 (JP, Y2)

Claims (4)

[Claims] 1. A support case (11) supported laterally movably at an end of a sewing machine arm (1), and a support case (11) side-by-side supported so as to be vertically movable and having a needle (19) at its lower end. A machining head (20) having a needle bar (17) and a machining tool (22,23) for performing a process other than sewing on the lower end, and for driving the needle bar (17) and the machining head (20) And a single drive means (2) provided on the sewing machine arm (1), and provided between the drive means (2) and the needle bar (17) and the machining head (20). Along with the movement of the case (11), the driving means (2), the needle bar (17) and the machining head (2
0) and the connecting means (5a, 25) for selectively selectively connecting with the drive means (2) and the needle bar (17) are connected, the needle bar (17) is continuously moved up and down. At the same time, when the driving means (2) and the machining head (20) are connected, the machining head (20) descends and is controlled to control the operation of the driving means (2) so that the machining head (20) is held at the lowered position. (Four
1) and a sewing machine main shaft (2) that is rotationally controlled by the control means (41) and constitutes the driving means, and is provided in parallel with the needle bar (17) and the machining head (20). , A rotation shaft (4) whose rotation is controlled by the control means (41)
And is fitted onto the rotary shaft (4) so as to be vertically movable,
An operating body (5) that is operatively connected to the sewing machine main shaft (2) and moves up and down with respect to the rotating shaft (4) based on rotation of the sewing machine main shaft (2); and rotation of the rotating shaft (4). Moving means (15, 16) for laterally moving the support case (11), and the needle bar (17) or machining head (20) corresponding to the actuating body (5) along with the lateral movement of the support case (11). ) Is engaged with the actuating body (5) and moves up and down integrally with the actuating body (5), the connecting means provided on each needle bar (5) and the machining head (20) is configured. A sewing machine including a connecting member (25). 2. The sewing machine according to claim 1, wherein the processing head comprises an ultrasonic head (20) having a processing horn (21) at a lower end thereof. 3. A plurality of needle bars (17) and one ultrasonic head (20), which are arranged at equal intervals in the moving direction of the support case (11). A sewing machine according to item 2. 4. The sewing machine according to claim 2, wherein the ultrasonic head (20) is vibrated by switching between a low frequency for cutting and a high frequency for heat welding.