JPS6088165A - Multi-head type 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 multi-head embroidery sewing machine equipped with a plurality of hooks and a plurality of sewing machine heads corresponding to each hook. The present invention relates to automatic selection of any combination of driving and stopping of the needle bar of the head.

BACKGROUND ART Conventionally, in multi-head embroidery sewing machines, all the heads are operated together so that the same sewing pattern is produced by each head. As a result, the entire pattern obtained within one embroidery frame becomes monotonous and lacks interest. In other words, each sewing pattern corresponding to multiple heads (sewing machine heads) is
Although various patterns can be created by driving, all heads create the same pattern, leading to monotony.

Purpose of the Invention The present invention has been made in view of the above-mentioned points, and it is possible to expand the variation of pattern creation by selectively controlling the operation or pause of each sewing machine head, and to embroidery with various patterns that are free from monotony. The purpose is to make it possible.

Summary of the Invention A multi-head embroidery sewing machine according to the present invention includes a setting means for setting a combination of heads to be operated and heads to be stopped in accordance with the operation steps, and a setting means for setting the combination of heads to be operated and heads to be stopped according to the progress of the operation steps. The present invention is characterized by comprising means for reading out the combinations read out, and needle bar drive control means for independently enabling or disabling the needle bar drive mechanisms in each head in accordance with the read combinations.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram conceptually showing the main part of the present invention, and the setting means 1 sets the combination of the head to be operated and the head to be stopped among the heads H and -Ho in accordance with the operation step. A semiconductor memory such as RAM or ROM or an external recording medium such as paper tape, magnetic tape, paper card, or magnetic card stores the combination in advance for each step, or the combination is manually set for each step. It consists of setting switches, etc. The readout means 2 is for reading out the combinations set by the setting means 1 as the operating steps progress, and is comprised of a step counter or appropriate signal generating means such as a paper tape linked to the main shaft of the sewing machine. The operation steps basically proceed in conjunction with the rotation of the sewing machine main shaft. Incidentally, the operating step here does not necessarily mean a step for each stitch, but rather means some switching point in the embroidery sewing operation that is programmed in advance.

Each of the sewing machine heads H1 to Hn is equipped with a needle bar drive mechanism having a well-known configuration. That is, the movement of the needle bar drive power sources 3-1 to 3-n is transmitted to the needle bars 5-1 to 5-n via the flanges 4-1 to 4-n. usually,
The power sources 6-1 to 6-n are constituted by a known motion conversion mechanism that converts the rotational motion of the main shaft of the sewing machine into reciprocating linear motion of the needle bar. The connection or disconnection of each clutch 4-1 to 4-n is controlled by a corresponding solenoid 5OL1 to 5OLn. The electromagnetic clutch means comprising such a latch and a solenoid corresponds to the needle bar drive control means in the present invention. That is, the combination data read from the setting means 1 is applied to each head H.

(5) The solenoid is supplied to each of the solenoids 5OL1 to 5OLn corresponding to ~Hn, and in the head to be operated, the solenoid is kept deenergized and the clutch is left connected,
At the head that should be stopped, the solenoid is energized and the clutch is disengaged. In this way, the needle bar drive mechanisms in each of the heads H] to H are independently operable or disabled according to the combinations read out from the setting means 1. In other words, when the clutch is disengaged, the movement of the power source is not transmitted to the needle bar.
The movement of the needle bar stops at top dead center, but the needle bar is driven by the head where the clutch is connected.

By the way, it is well known that there is a control called "jump" which expands the sewing width by one stitch by stopping the needle bar at the top dead center for one stitch and moving only the embroidery frame (not shown) by a predetermined amount. It is. For this jump, the needle drive mechanism of each head has conventionally been provided with a jump clutch and a jump solenoid. Accordingly, as the clutches 4-1 to 4-n and solenoids 5QLl to 5OLn for needle bar drive control in the present invention, conventional jump clutches and solenoids (6) can be used. However, the form of control is completely different from conventionally known jumps. In other words, with jump control, the needle bars of all heads are stopped at the top for one stitch time in the middle of pattern sewing, thereby realizing a wide sewing width for each head, whereas with this invention, the sewing width of a specific sewing machine head is It halts the movement itself. Therefore, for example, when the head H1 is stopped (energized by the solenoid 5OL1) according to the present invention and the head H2 is operated (
Solenoid 5OL2 is deenergized), and if it is necessary to jump due to the request of the pattern data being created at that time, it is possible to temporarily energize the solenoid 5OL2 of the head H2 to make the needle bar 5-2 jump. That is, even if a common clutch and solenoid are used, the control of the present invention and the conventionally known jump control can coexist.

The operation step in which the selection combination of heads is to be changed can be instructed by a needle bar color change command or a pattern end command. As is well known, in automatic embroidery machines, a needle bar color change command or pattern end command can be incorporated into the program, and in the step where the color change command is issued, the needle bar is moved up and down in order to change the color of the needle bar. Drive temporarily stops. Similarly, when a command to end a series of patterns is issued, the vertical movement of the needle bar is stopped. The time of color change or completion is a break in a series of sewing operations, and it is conceivable to switch the selection combination of heads in response to such breaks in the sewing operation. In that case, the reading means 2 is configured to advance the reading step by one step when the color change command code or the termination command code is given. However, it is of course possible to program a unique combination switching command signal other than the color change command code or termination command code, and to switch the head selection combination switching step using this. Incidentally, as is well known, each head H.

-Hn needle bars 5-1 to 5-n are not one but a plurality of them, and one of them is selected in response to a color change signal. Of course, if the head selection combination step is advanced by the color change command signal,
There may be cases where you want to change the head selection combination but not the thread color. In such cases, the color change information corresponding to the color change command signal should be the same as the previous step, or the information for no color change should be used. You can leave it as .

FIG. 2 is an overall control block diagram of a multi-head embroidery sewing machine embodying the present invention. The control unit 10 is a part that controls the basic operations of the embroidery sewing machine, and is controlled by an electronic control circuit configured with a microcomputer, for example. Become. Operation panel 11
includes various operation switches of the sewing machine and setting switches for setting various data. The tape reader 12 is for reading the operating program and data for sewing a desired embroidery pattern recorded on a paper tape.

The main shaft sensor 13 detects the rotation angle of the main shaft of the sewing machine. The frame driving device 14 is for driving the embroidery frame in the X-Y direction. The needle bar position moving device 15 is for moving the needle bar position of each head in accordance with color change information.

The pattern data read by the tape reader 12 is stored in the internal RAM of both parts 10 (9). This data includes (1) x-y movement data of the embroidery frame for each stitch, jump commands, color change commands and color change information, end commands, combination data of operation or pause of each head, etc. When the sewing machine starts, the control section 10 detects the progress of the sewing operation based on the output of the main shaft sensor 13, and sequentially reads out pattern data from the RAM in accordance with the progress of the sewing steps. The read data is output from the control unit 10 at a predetermined timing according to the rotation angle of the main shaft. The X-Y movement data of the embroidery frame is read out for each stitch and output to the frame drive device 14 at a predetermined spindle rotation angle.

The color change information is read out at the step of the color change command and output to the needle bar position moving device 15. The head combination data is read out at the step of the color change command or end command, and is output to the head selection section 16 via an appropriate buffer memory or the like. The head selection unit 16 forms an operation/pause selection signal corresponding to each head according to the supplied head combination data. When a jump command is read,
A jump timing signal is output from the control section 10 at a predetermined (10) spindle rotation angle, and is given to the jump timing signal output section 17. The jump timing output section 17 generates a signal to enable rapid suction of the solenoid in accordance with the required jump angle. Further, the chopper shaping section 18 is controlled by the control section 10.
A chopper waveform is formed by the signal from the jump signal output section 19. The jump signal output section 19 includes a jump timing output section 17 and a chopper shaping section 18.
A signal necessary for energizing the solenoid at high speed is formed by the signal from the oscilloscope 1, and this signal is applied to the signal selection section 22.

The control unit 10 outputs a thread breakage timing signal at a predetermined rotation angle and a seven-separation signal which is independent of the rotation angle every rotation of the main shaft. This signal is applied to the yarn breakage timing signal and reset signal output section 20.

Further, the operation/pause selection signal for each head output from the head selection section 16 is given to the head selection output section 21,
It is converted to a level that can be treated as an external signal.

The jump signal, thread breakage timing signal, and reset signal output from the output units 19 and 20 are sent to each head H1-H.
, are supplied to the signal selection section 22 corresponding to each of the signals. The head selection output section 21 outputs signals for instructing operation or suspension for each head in parallel, and also provides the signal selection section 22 with a signal for selecting a reset signal in accordance with the suspension of the head.

Depending on the set combination, the pause or operation signal is at O level for the head to be operated, and has a predetermined level for the head to be paused. The selection signal for each head is sent to the signal selection section 22 corresponding to each head.
The pause or operation signal is supplied to the jump output amplifier section 26 corresponding to each head. In FIG. 2, a signal selection section 22, a mamp section 23,
Although only the solenoid 5OL1 is illustrated, similar arrangements are provided for the other heads.

The signal selection section 22 selects either the thread breakage timing signal or the reset signal, and also includes a circuit that forcibly selects the reset signal when a head stop signal is given.

When the operation corresponding to the head is selected, a thread breakage timing signal can be supplied, and it is possible to check whether thread breakage has occurred at this timing, and if thread breakage has occurred, the thread breakage timing signal can be supplied. The lamp can be lit (the circuit for this purpose is not shown). On the other hand, when pause is selected for that head, the thread breakage timing signal is not supplied, and the thread breakage lamp of the pause head is prevented from lighting up. Further, the jump signal is given to the jump output amplifier section 26 via the signal selection section 22.

The jump output amplifier section 23 converts the jump signal or the pause signal into a signal level that can drive a solenoid, and supplies the signal level to the jump solenoid 5OLl.

As mentioned above, the jump signal activates solenoid 5OL1.
When the solenoid 5OL1 is energized, the needle bar stops one stitch above, but when the solenoid 5OL1 is energized by the stop signal, the needle bar stops continuously.

Effects of the Invention As described above, according to the present invention, combinations of heads to be operated and heads to be stopped are programmed, and these are read out as the operation steps progress, and each head is operated or stopped according to the read combinations. Since the automatic embroidery is automatically selected, it is possible to greatly diversify the types of embroidery patterns and bi-IJ knees that can be created in automatic embroidery.

[Brief explanation of drawings]

FIG. 1 is a diagram conceptually showing essential parts of the present invention, and FIG. 2 is a block diagram schematically showing an example of the overall control block of a multihead embroidery sewing machine embodying the invention. 1 Setting means, 2...reading means, 6-1 to 3-n
・・Power source, 4-1 to 4-n ・Clutch, 5-1 to 5-n Needle bar, ■1 to Hn ・Head, 5OLi to 5
OLn... Solenoid, 10 - Control section. Applicant: Tokai Kogyo Sewing Machine Co., Ltd. Agent: Yoshihito Iizuka

Claims (1)

[Claims] 1. In a multi-head embroidery machine equipped with a plurality of hooks and a plurality of sewing machine heads corresponding to each hook, the combination of heads to be operated and heads to be stopped is set in accordance with the operation steps. a setting means, a means for reading out the combinations set by the setting means as the operation steps progress, and a needle bar drive for enabling or disabling the needle bar drive mechanism in each head independently according to the read combinations. A multi-head embroidery sewing machine characterized by comprising a control means. 2. The multi-head embroidery according to claim 1, wherein the readout means switches the step of reading out the combination in accordance with the step of instructing to change the color of the needle bar or the step of instructing the end of the pattern. sewing machine. 3. The needle bar drive control means is comprised of an electromagnetic clutch means provided at a location that transmits the movement of the needle bar drive power source to the needle bar, and connects the clutch corresponding to the head to be made operable, and to disable it. 2. The multi-head embroidery sewing machine according to claim 1, wherein the clutch corresponding to the desired head is disengaged. 4. The electromagnetic clutch means includes a jump clutch mechanism for jumping the needle bar and a jump solenoid for controlling this clutch mechanism, and depending on the combination, it independently energizes or energizes the solenoid of each head. A multi-head embroidery sewing machine according to claim 6, wherein the multi-head embroidery sewing machine is deenergized.