JPS6088584A - Embroidering machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a one-head type or multi-head type needle needle with an improved method of driving the needle bar.

Prior art Conventional needle bar driving method of the conventional needle bar 9:li Minn's needle bar driving method transmits the assistance of - main shaft motors to the needle spool, thread take-up, and hook via a power transmission mechanism such as a cam mechanism or a belt mechanism. It was designed to drive all three at the same time.

However, in this conventional needle bar 1 drive method, the needle bar,
In order to operate the balance and the hook using one motor, the time relationship between the needle bar, the balance, and the hook is fixed to a certain interval set by the structure of the power transmission mechanism. However, it was impossible to change the stitching condition by sewing loosely or tightly.

In addition, as shown in Fig. 1, since the relationship between the vertical alignment position of the needle bar and the rotation angle layer of the hook shaft is also constant, the needle; The side rod is thorn +
::'a Rotation angle of the hook shaft while it is stuck on the cloth [current (θ in the figure)
2-01) and the rotation angle at which the needle bar is above the needle temporary position ift and the embroidery frame can be moved (θ1-0 in the figure).
and 2/r-θ2) is fixed at a constant ratio. In other words, the ratio of the time during which the four needles are embroidering into the cloth and the time during which the embroidery frame 2 can be moved out of the time required for one stroke of the needle is fixed at a constant ratio. There was a C. On the other hand, it is more flexible to keep 41111 and 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 00000000000 000 It is preferable to keep it.

Then, the rotational speed of the spindle is 1. Conventionally, it was difficult to operate at high speeds due to fixed distortion.

Furthermore, in order to drive the side rod, balance, and hook with only - motors, a complex power/mechanism 1) degree 4 power is required, which increases the complexity of the end of one row and the accompanying There were drawbacks such as decreased reliability.

Purpose of the Invention This invention surpasses the conventional thorns! It was developed to eliminate the shortcomings of the Mi'/N, and by improving the driving method, it was possible to adjust the sewing tension, increase the speed, and reduce the need for complicated power. Embroidery fv (A) with unstable transmission mechanism To provide a sewing machine Summary of the invention That is, the embroidery sewing machine of the present invention is provided with a detection device for detecting the rotation angle of a hook shaft (or main shaft) and drives the hook shaft. A linear motor for driving the needle bar is provided in each head separately from the main shaft motor, and the operation of the linear motor is controlled in synchronization with the rotation angle of the shuttle shaft detected by the detection device. A special feature is that the operating timings of the three components, the balance and the pot, can be freely set.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 is an engineering block diagram showing an embodiment of the present invention. In FIG.
1a.

It has ROM1 b, RAMI c, and ROTVllb
A data processing program is written in the RAM 1c, and data such as embroidery design, embroidery frame, drive amount and two-color change are written in the RAM 1c. The microcomputer section 1 includes the microcomputer i'11 (main axis for electrically connecting the microcomputer i'11 with each side device): U-needle interface 2. rotary encoder: 1-da interface 4h, '1p42Hr% g)-(n:9-soLy,
B p Ill&iA Frame% Dynamic Interface 24.
A-temperature interface 29 y Operation: The interface interface 62 is connected.

Main shaft motor interface chair 2 Q'', 1, main 111
The b motor 6 is covered with a screw 5, and the main motor 6 is
-Yu 6 (drives hook shaft 6 via upper bell 1.7. Hook l
A plurality of pots (not shown) corresponding to 6 (''-sewing machines σ) cars 1i! iJ 9.1". Also, pot ll'+l+ 61tC&-j
, Rotary encoder 5 has been reprinted, 1:12
The rotation angle signal 3 of the hook shaft 6 is supplied to the rotary engine 1 interface 11 by detecting the corner of the eave 16θ once.

Linear servo motors 10, 15, and 20 are provided as side rod drive devices corresponding to six heads, and servo amplifiers 9, 14, and 19 for driving these linear servo motors 10, 15, and 20 are equipped with a microcomputer. A needle bar vertical movement command signal from section 1 is applied via needle bar drive interface 8. A needle bar 12°17.22 is connected to the drive shafts 11, 16, 21 of a valley near servo motor 10°15.20, and the needle bar movement! I
The needle bars 12, 17,
22 is driven. Linear scales 13.18 and 26 are connected to the drive shafts 11 and 16.21, respectively.
16, 210 feeds back a feedback signal corresponding to the movement position to the servo amplifiers 9, 14, 19. Servo amplifiers 9, 14, and 19 control the operations of linear servo motors 10, 15, and 20 based on the deviation between the needle bar movement amount command signal and the foot strike signal.

The embroidery frame drive interface 24 includes a Y111+/Kurus motor driver 25. Y-axis cross morph 26 via X-axis cross morph driver 27, XIQl+
・Z) Resmorph 28 is connected respectively, and the corresponding Y
Lusumo-1' 26) XII'lG pulse motor 2
Reference numeral 8 drives the embroidery frame (i/), not shown, in the Y-axis direction and the X-axis direction, respectively.

A paper tape reader 30 is connected to the paper tape reader interface 29, and the 2Y1 (tape reader 60 reads the paper tape 31 on which the data of the above-mentioned punch ii; l7JIV beat 9 is punched, The data is sent to the microphone U:I computer 1131 via the face 29.

An operation panel 66 is connected to the operation panel interface 62, and the operation panel 66 transmits j to "starting the sewing machine by 3 operations" to the microcomputer section 1. .

Next, the operation of this embodiment will be explained.

Operation of the sewing machine is started by pressing the start switch on the operation panel 66. The data of the paper tape filter 1 is read by the paper tape reader 60 as '54c/'1. IIM and the data is stored in the RAM of the microcomputer γ'110, lc
When the program is written to the ROM 1bKIIi, the CPU 1a controls the main 111+motor 6, linear servo motors 10, 15, 20 . Signals instructing the respective operations are sent to the Y medium-thickness pulse smoke 26 and the X1lll11 pulse motor 28, and each motor starts its operation.

The main shaft motor 6 drives the hook shaft 6 via a belt 7, and the rotation angle of the hook shaft 6 is sent to a rotary encoder. The microcomputer unit 1 inputs the data of the transfer angle of the hook shaft 6 of the tobacco and the needle 1 hook 12 with respect to the rotation angle of the hook l1qII6 as shown in FIG.
, 17. Based on the movement position data of 22, the needle bar 12,
17. Calculate the initial discharge of movement 1 of 22, and set the servo amplifiers 9 and 1.
4. Send the needle bar movement amount command signal to 19. Next, the needle bars 12, 17, 22 in response to this needle bar movement amount command signal.
The actual position of is detected by linear scales 13, 18, 23, and a signal indicating the position is detected by linear scales 13,
The signal is fed back from 8.23 to the servo amplifier 9, 14.19, and in the servo amplifier 9.14.19, the deviation between the needle bar movement amount command signal and the signal indicating the actual needle bar position becomes O. The moving positions of needle bars 12, 17, and 22 are controlled in this manner.

On the other hand, mark X=J on the embroidery hoop and mark 1. n (n1-)°61
The data input from the rotary encoder 5 and the rotation data of the hook shaft 6 detected by the rotary encoder 5 are stored in the ROM1.
C with 1tYi-,)
From PU1a Y East 11 Pulsmoke 26. A signal instructing the operation of the XΦ mountain pulse motor 28 is output, fb,
Y'Ura Pulsmo-Tough 6. The X1llllll1 pulse motor 28 causes the stabilization i:i:°1 frame to become hyperactive 2 times in the X-Y ``lsensei 1''.

In this way, the hook shaft 6, the needle bars 12, 17, 22, and the embroidery frame are set on separate main shafts, according to the data manually entered from the paper chisoro 1 and the pre-written program.・Ko-Yu6. Linear servo motor 10, 15, 20, Yllllll pulse motor 2
6, Xtl! + Driven by pulse motor 28 ζ;
i′L embroidery 1 忰(・′(2 fixed embroidery ii: li cloth・
\nosashi'h]:li1ganasaJ(ro.

Although the scales are not shown, the 111th Tanabata, '
) or may be driven by power from either the linear servo motors 10, 15, or 20 via a power mechanism (not shown).

FIG. 4 is an IL-like block diagram showing another practical example of the present invention, in which the same components as in the embodiment of FIG. 2 are given the same numbers.

The example of the postage shown in Figure 4 is the needle bar 12 of the example shown in Figure 2.
A linear pulse motor 35, 37, 39 is used instead of the linear servo motor 10, 15, 20 as a linear motor to drive the 17, 22, and a linear pulse motor 35, 37, 39 is used instead of the servo amplifier 9, 14, 19. This uses linear pulse motor drivers 34, 36, and 68. That is, the second
The actual position of the figure is 4 bars 12° 17.22? In contrast to the servo resistor 111-1j which performs the ijJ1 transfer, the embodiment shown in FIG. 4 employs open loop control. Except for the linear motor, the embodiment shown in FIG. 2 and the embodiment shown in FIG. 4 have the same components, so a description of the structure and operation of the embodiment shown in FIG.

Note that, although the above χ embodiments all show multi-head sewing machines, a single-head sewing machine may be used. However, it may be possible to selectively switch between multiple 4" needles per head, as is normally done now.

Effects of the Invention As stated above, this invention provides
jl In a sewing machine, the main shaft that drives the hook shaft: 1:
A linear motor is installed to drive the side bar separately from the needle bar, and the hook and needle bar are mutually moved in one bar.
Then, tQ p <II' 1・□15. Since the timing of the three-way movement of the balance can be freely set to 1' (setting C), the sewing at V element can be controlled from 1' to 11'. Also, the movement of the side bar with respect to the rotational circumference of the hook shaft can be adjusted. The position can be set freely, for example, the rotation angle (θ4-θ3 in the figure) of the needle bar is lower than the needle plate position l in Fig. 3 Q (small J-I: A) is set to a small value. By this,
The needle is stuck in the embroidery cloth11. 'J distance can be increased by 4.1, thereby reducing the time ν)70% a that the button pierces the kelp during one stroke of the needle.

Therefore, while maintaining a sufficient distance of 11.5 degrees for the movement of the embroidery frame, it is possible to make one stroke of the needle. It is possible to shorten the overall time for
(1lj7j becomes possible.Furthermore, complex power transmission i
Since the &1'i'j is not required, the structure can be simplified and the reliability of the entire device is improved.

[Brief explanation of the drawing]

Fig. 1 is a characteristic diagram of the needle of the sewing machine 1), and Fig. 2 shows the configuration of the circuit 4'it of an embodiment of this invention. The block diagram, FIG. 3, is a diagram showing an example of a custom-made needle bar's downward movement position that can be set arbitrarily with the needle 11i; i1'l min/min of these three inventions, and FIG. It is a diagram showing the path configuration of the embodiment. 1... Microcomputer=lS, 2... Dochu Il
l Motor interface, 6... Main shaft motor, 4...
・Rotary encoder interface, 5 ・Rotary encoder, 6...Z#L 7...Hell l-
, 8...needle bar iW, □assistant interface 14
．． 19...Servo amplifier, 10,15.20...Linear servo motor, 11.16,21. ,・Drive shaft, 12
, 17.22...Needle bar, 16, 18.23...Linear monochrome 24...Stab Kthn 4'+ 1 drive interface, 25...Y I+1+・z loose smoke driver, 26・・・Y axis) ζ Lu smoke, 27・
・・X jFtll Pulse motor Drino:, 2B・
...・
・Linear pulse motor・Tadraiha, 65.67.69.
, Linear Pulse J”: Kazuya. , Applicant Tomen Kogyo Min Co., Ltd. is represented by Yoshi Iizuka 1-

Claims (1)

[Claims] (1) Single-head or multi-head embroidery: In one sewing machine. A detection device for detecting the rotation angle of the hook shaft, +7 and - a motors provided for each head to drive the rotary rod, and a 13iJ record in synchronization with the rotation angle of the hook 11110 detected by the production device. A machine equipped with a control device that controls the 11 operations of a linear motor. 2. The sewing machine according to claim 1, wherein the linear motor is a linear motor Tanabata. 3. The motor according to claim 1, wherein the linear motor is a linear pulse motor.