JP2926360B2 - Automatic sewing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to an automatic sewing apparatus, and more particularly to an automatic sewing apparatus having a wide sewing work space.

[Conventional technology]

Conventionally, a part constituting sewing used in an apparatus called an automatic sewing machine is provided with a sewing structure under a certain condition in which a needle and a stoma are restricted by a mechanical structure using, for example, constant speed rotation as a power source. A general-purpose sewing machine to be used or a partially modified general-purpose sewing machine has been used.

The positional relationship between the needle and the stylus that composes the sewing requires fine precision in the three-dimensional positional relationship and the temporal motion relationship, and in order to satisfy this, maintaining the mechanical precision Is the only solution, with the motor as the power source and the components such as gears, toothed belts, shafts, links etc. integrated in an integrated frame called the arm bed, and the needle part The interrelationship of the movements of the parts was satisfied.

Therefore, in the conventional automatic sewing device, it has been considered that the structure of the frame for maintaining the accuracy naturally limits the sewing space.

FIG. 8 is a schematic view of a conventional standard sewing machine. In the drawing, the so-called sewing space is limited to the range indicated by B.

[Problems to be solved by the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic sewing apparatus which solves the above-mentioned problems of the prior art and can freely increase a sewing work space without being limited by the size of an arm bed.

[Means for solving the problem]

In order to achieve the above object, the present invention relates to an automatic sewing apparatus that forms a stitch with a needle driving unit and a kama driving unit, and includes a traverse that vertically surrounds a fabric fixing frame mounting surface of a frame and is movable in the YY direction. A needle drive unit capable of moving the upper side of the fabric fixing frame mounting surface along the upper and lower frames of the traverse in the Χ-Χ direction, and the needle fixing unit mounting surface of the fabric fixing frame mounting surface along the lower frame of the traverse. And a pulse motor that drives a needle in the needle drive unit and a camera in the camera drive unit. The control device for the pulse motor is provided.

[Action]

Separating the needle drive unit and the kama drive unit to make them independent units eliminates the limitation due to the size of the arm bed, and allows the sewing work space to be freely increased, thus responding to automation of sewing. The degree of freedom is greatly improved, and the stitches can be easily formed freely by moving the needle driving unit and the kama driving unit to arbitrary positions according to a command from a computer, for example. In addition, the use of dedicated pulse motors as the drive sources for the needle and the stirrer makes it possible to freely obtain the optimum conditions for forming the stitches. It is possible to freely set conditions such as irregular speed rotation, temporary stop, and the like by computer control.

〔Example〕

 Next, the present invention will be described in more detail with reference to examples.

1 to 5 are explanatory views showing an embodiment of the automatic sewing apparatus according to the present invention, and FIG. 1 is an overall perspective view. In the figure, a frame 1 and Y-
A traverse 2 movable in the Y direction, a needle drive unit 3 movable in the Χ-Χ direction along upper and lower frames of the traverse 2, and a fabric fixing frame 24-
27 is shown.

FIG. 2 is an overall view for explaining the driving principle of FIG. In the figure, a frame 1 and Y-
A traverse 2 movable in the Y direction, a needle drive unit 3 movable in the Χ-Χ direction along the upper frame of the traverse 2, and a camera movable in the _{１ 1} -Χ ₁ direction along the lower frame A drive unit 12 is shown, said traverse 2
A motor 18 for moving the needle drive unit is provided at one end of the upper frame, a motor 19 for moving the cam drive unit is provided at one end of the lower frame, and one end of the frame on which the traverse 2 of the frame 1 slides. Each has a traverse moving motor 20 embedded therein. Reference numerals 4 and 13 denote lids provided on the needle driving unit 3 and the cam driving unit 12, respectively.

In such a configuration, the needle driving unit 3 drives the needle driving motor 18, the kama driving unit 12 drives the kama driving unit moving motor 19, and the traverse 2 drives the traverse moving motor 20. , Can be moved arbitrarily.

FIG. 3 is an explanatory diagram showing a movement transmission mechanism of the needle driving unit 3 of FIG. In the figure, the needle drive unit 3 is mounted on the upper frame of the traverse 2, and a needle drive motor 18 is embedded at one end of the upper frame.
A toothed pulley 21 is arranged on the needle driving unit moving motor 18 and a toothed pulley 22 is arranged at the other end.
An endless toothed belt 23 is continuously connected to and 22. Reference numeral 4 denotes a cover of the needle driving unit fixed to the needle driving unit 3, and reference numerals 40 and 41 denote fixing screws for fixing the needle driving unit 3 to the toothed belt 23.

In such a configuration, the needle driving unit 3 moves in the Χ-X direction by rotating the needle driving unit moving motor 18 to rotate the toothed belt 23 linked to the pulleys 21 and 22 forward or backward. The needle drive unit cover 4 maintains the accuracy of the movement of the needle drive unit in the Χ-Χ direction.

The movement drive mechanism of the kama drive unit is the same as the needle drive unit transfer mechanism, and is connected to the two pulleys by rotation of a kama drive movement motor 19 embedded at one end of the lower frame of the traverse 2. rotating the toothed belt that is, sickle driver unit fixed to the tooth-shaped belt Χ ₁ -Χ
Move in _one direction. At this time, the camera drive unit lid 13
Serves to hold the accuracy of hook driver unit moves Χ ₁ -Χ ₁ direction.

Also, the Y-Y direction movement transmission mechanism of the traverse 2 is the same as the movement transmission mechanism of the needle drive unit or the cam drive unit, and the traverse movement motor 20 provided inside the frame 1 is rotated, so that The endless toothed belt is rotated to move the traverse 2 fixed to the toothed belt in the YY direction.

FIG. 4 is an enlarged view of the needle driving unit of the present embodiment. The needle driving unit 3 includes a needle driving motor 5 provided inside the unit main body, a needle 6 and a top bin 11 that move up and down by driving the needle driving motor 5, and a needle bar 7 that supports the needle 6. , A presser foot 8 for pressing the sewing cloth, and a presser bar 9 for supporting the presser foot 8. The needle drive unit 3 has a needle movement check sensor 6A and a needle thread tension plate unit 10. Is provided. 4
Is a needle drive unit cover.

FIG. 5 is an enlarged view of the camera driving unit according to the present embodiment. The camera driving unit 12 includes a unit body,
A motor 17 for driving the cam provided in the unit body,
Kama motion check sensor 16A and thread trimming unit 38
And the cam 16 protruding from the side of the cam drive unit body
And a cloth sliding plate 14 forming the upper surface of the unit main body, and a needle plate 15 provided on a portion of the cloth sliding plate 14 above the claw 16. Reference numeral 13 denotes a lid of the camera driving unit.

The needle drive unit 3 and the kama drive unit 12 having such a configuration are placed on the upper frame and the lower frame of the traverse 2 in FIG. 2, respectively, and these are automatically controlled by, for example, a computer. That is, the traverse moving motor 20, the needle driving unit moving motor 18 and the kama driving unit moving motor 19 are controlled by the command of the computer, and the needle driving unit and the kama driving unit for forming the sewing move to a predetermined position, and The needle driving motor 5 and the kama driving motor 17 are controlled, and the sewing is formed by the needle and the kama.

FIG. 6 is a perspective view showing an example of a fabric fixing frame for fixing a fabric at the time of sewing and selecting an arbitrary stitch. Each of the fabric fixing frames 24 to 27 is provided with a hole having an arbitrary shape, and the fabric fixing frame is fixed to the frame 1 with bolts 28. The sewing pattern determined by the fabric fixing frame is read, for example, by a computer, and the needles of the needle driving unit and the stitches of the kama driving unit are controlled in accordance with the pattern to form a pre-selected stitch.

FIG. 7 is a block diagram showing an outline of a control system of an automatic control device for controlling the automatic sewing device according to the present embodiment.

In the figure, a microcomputer unit (hereinafter, referred to as a microcomputer unit)
The microcomputer unit 30 includes a program memory 30A for programming a series of sequence operations relating to automatic sewing, a sewing speed, etc., a data memory 30B capable of accessing and storing various data, and a central processing unit (hereinafter referred to as a CPU) 30C. Consists of The operation panel 35 includes a first setting device 35
A, a second setting device 35B and a third setting device 35C are arranged, and are connected to the microcomputer unit 30 via an interface circuit 32, respectively. A pattern program 34 is provided between the first setting unit 35A and the interface circuit 32.
An arbitrary sewing pattern is stored in the pattern program 34, and various memory cards are exchangeably stored. Further, a needle movement check sensor 6A and a kama movement check sensor 16A for confirming the movement position of the needle and the broom and a type confirmation sensor 24A to 27A of the cloth fixed frame are connected to the microcomputer unit 30 via the interface circuit 33, respectively. I have. Needle drive motor 5, Cam drive 17, Motor 1 for moving needle drive
8, a motor driver 29 for controlling the motor 19 for moving the kama driving section, the motor 20 for moving the traverse, and the thread trimming motor 38
Are connected to the microcomputer unit 30 via an I / O port 31. A cylinder driver 29A for operating a cylinder 29B for applying pressure to the presser foot 8 for holding the fabric is also connected to the microcomputer unit 30 via the I / O port 31.

When controlling the automatic sewing device by the automatic control device having such a configuration, first, a cloth for forming a stitch is set in the automatic sewing device, and the cloth is fixed by a arbitrarily set cloth fixing frame, and a predetermined sewing operation is performed. When the automatic sewing start button (not shown) on the operation panel 35 to which the conditions are input is pressed, the first setting device 35
A is a type of sensor 24A-27A for checking the type of the fabric fixing frame in order to prevent the fabric fixing frames 24-27 and the needle 6 from colliding with each other.
A sewing pattern matching the cloth fixing frames 24 to 27 is selected from the pattern program 34 based on a signal (not shown). The second setting device 35B is provided with a needle movement check sensor 6A and a kama movement check sensor 16A in order to maintain the positional relationship between the needle and the stitch for forming the sewing and the delicate accuracy of the temporal movement relationship. Based on the signal, the rotation speed of the needle driving motor 5 and the cam driving motor 17, which are the power source for the speed of the movement of the needle 6 and the stirrup 16 (sewing speed), is set.
The third setting unit 35C sets the rotational speeds of the needle driving unit moving motor 18, the kama driving unit moving motor 19, and the traverse moving motor 20, which determine the stitch roughness. The sewing conditions set by the setting devices 35A, 35B and 35C in this way are read by the microcomputer unit 30, the relevant numerical values are calculated by the microcomputer unit 30, and the result is output to the I / O port 31.
Is sent to the motor driver 29 via the. Next, this signal is sent to the needle driving motor 5, the camera driving motor 17, the needle driving unit moving motor 18, the camera driving unit moving motor 19 and the traverse moving motor 20, and the setting conditions are given to each pulse motor. Can be At this time, in order to apply an appropriate pressure to the presser foot 8 for holding the fabric, the microcomputer unit 3A is operated by a cylinder driver 29A that operates a cylinder 29B.
From 0, a signal is sent through the I / O port 31 and the fabric is fixed at an appropriate pressure. After all the conditions constituting the sewing are given to each drive unit in this way, the sewing operation is started. Even during automatic sewing, the above sensors always work,
Conditions for continuing normal sewing are set by the first, second, and third setting containers based on the detection data of the sensors, and each driving unit is controlled according to the conditions. In this way, the stylus 6 of the needle driving unit 3 and the stylus 16 of the kama driving unit 12 are controlled so as to always maintain a correct positional relationship, and a stable stitch is formed.

When the automatic sewing operation is completed, the I / O
A signal is sent to the motor driver 29 via the O port 29,
Next, the sewing end signal is sent to the thread trimming motor 38, which operates the thread trimming motor 38 to cut the upper thread and the lower thread by a known thread cutting method, thereby completing a series of sewing operations.

According to the present embodiment, the needle driving unit 3 and the cam driving unit 12 are divided into independent units, and the needle and the cam are driven by the pulse motors incorporated in each unit, thereby increasing the sewing space. Not only is it possible to freely obtain the optimum conditions for forming the seam.

In this embodiment, the stitch roughness can be freely selected by appropriately selecting the number of movements of the needle per unit time and the amount of movement in the Χ and Y directions.

In the present embodiment, the fabric fixing frame can have various shapes depending on the type of the sewing product, and the configuration may be an integral body or an appropriately divided one. Further, the attachment and detachment of the fabric fixing frame can be automatically performed by a computer or the like.

In the present embodiment, the needle drive unit 3 mounted on the upper frame of the traverse 2 and the kama drive unit 12 mounted on the lower frame need not be single, but may be two or more. . That is, for example, one needle driving unit A and two kama driving units B and C loaded with different colors of lower thread are provided. During the sewing operation, for example, the needle driving unit A and the kama driving unit are initially provided. The sewing is formed by the unit B and then the sewing is formed by a combination of the needle driving unit A and the kama driving unit C. Thereafter, the combination of the needle driving unit and the kama driving unit is sequentially changed arbitrarily. Alternatively, the sewing may be formed by changing the combination of the colors of the sewing thread. In this case, a plurality of needle driving unit units or camera driving unit units are driven by separately provided dedicated driving motors.

In this embodiment, a lockstitch sewing machine has been described as an example, but the present invention is not limited to this.
The present invention can also be applied to a sewing mechanism that constitutes a stitch type such as green overcast sewing.

〔The invention's effect〕

According to the present invention, the needle drive unit and the kama drive unit are separated to form an independent unit, so that the work space is not limited by the size of the arm bed, and the degree of freedom for automation in automatic sewing is increased. Significantly improved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an automatic sewing apparatus according to an embodiment of the present invention, FIG. 2 is an overall view for explaining the driving principle of FIG. 1, and FIG. 3 is a needle driving unit of FIG. FIG. 4 is an enlarged view of the needle drive unit in FIG. 2, FIG. 5 is an enlarged view of the kama drive unit in FIG. 2, and FIG. FIG. 7 is a perspective view of a fabric fixing frame used in one embodiment of the present invention, FIG. 7 is a schematic block diagram showing a control system of one embodiment of the present invention, and FIG. 8 is a schematic diagram of a conventional standard sewing machine. DESCRIPTION OF SYMBOLS 1 ... Frame, 2 ... Traverse, 3 ... Needle drive unit, 5 ... Needle drive motor, 6 ... Needle, 12 ... Kam drive unit, 16 ... Cam, 17 ... Cam drive Motor, 18 ... Motor for moving needle drive, 19 ... Motor for moving camera drive, 20 ... Motor for moving traverse, 21, 22,
... Toothed pulley, 24 ... Fabric fixing frame, 40, 41 ... Fixing screw.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-131476 (JP, A) JP-A-60-48786 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D05B 1/00-83/00

Claims (1)

(57) [Claims] An automatic sewing device for forming a stitch by a needle driving unit and a kama driving unit, a traverse which surrounds a fabric fixing frame mounting surface of a frame vertically and is movable in a Y-Y direction, A needle drive unit capable of moving the upper side of the fabric fixing frame mounting surface along the upper frame in the Χ-Χ direction, and the lower side of the fabric fixing frame mounting surface along the lower frame of the traverse. And a pulse motor for driving a needle in the needle driving unit and a cam in the cam driving unit, respectively, in the unit, and controlling the pulse motor. An automatic sewing device comprising the device.