JPH02279195A - Computerized embroidering machine - Google Patents

Abstract

PURPOSE:To easily execute a check for the remained quantity of a lower thread in a first needle location, the exchange of a lower thread bobbin and repair for the exhaustion of the lower thread by stopping an embroidering sewing machine and retreating an embroidering frame to the first needle location. CONSTITUTION:An embroidering machine 10 is equipped with a needle 11, which is vertically moved, and a loop formation catching means 12 and an embroidering frame 13 is fitted to a supporting body 15 which is driven and controlled by an X-Y driving mechanism part 14 as an embroidering frame driving means. Then to this frame, X-Y control is executed in synchronism with the needle 11, which is vertically moved, and embroidery is executed to worked cloth. In a position where the first needle location of the embroidering frame 13 is coincident with a needle location point N of the embroidering sewing machine 10, the embroidering frame 13 is positioned to a position 13A of an alternate long and short dash line. Then the check for the remained quantity of the lower tread through a transparent part 17a of a rectangular plate 17 in front of a throat plate 16, the exchange of a lower thread bobbin 18 and the repair for the exhaustion of the lower thread, etc., can be easily executed. In the position where the second needle location of the embroidering frame 13 is coincident with the needle location point N of the embroidering sewing machine, the embroidering frame 13 is positioned to the position of alternate long and two short dashes line and the finger, etc., of a sewing machine worker can be put into the front lower side of the embroidering frame 13. Then the embroidering frame 13 can be easily attached and detached.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a computerized embroidery machine, and more particularly, to a computer embroidery machine that, after stopping the sewing machine during embroidery work, can be moved to a desired needle drop position among a plurality of needle drop positions, and can be returned to the original needle drop position. The present invention relates to a computerized embroidery machine equipped with an embroidery frame drive control device.

[Prior Art and Problems to be Solved by the Invention] Checking the remaining amount of bobbin thread and attaching and detaching the bobbin during embroidery work;
It may be necessary to remove and reinstall the embroidery frame. l) Checking the remaining amount of bobbin thread and when it is necessary to attach or remove the bobbin Checking the remaining amount of bobbin thread is literally a check to see if there is any bobbin thread left on the bobbin. However, during embroidery work, the entire top surface of the bobbin thread bobbin is often covered by the embroidery frame holding the workpiece cloth, and in this condition, it is impossible to check the bobbin thread bobbin on horizontal hook type embroidery machines. This was impossible, and even with a vertical hook type embroidery machine, it would be difficult to do so if a relatively large embroidery frame was used. It is necessary to attach and detach the bobbin if the bobbin thread runs out during embroidery sewing, or if the bobbin thread breaks or gets tangled. In many cases, the bobbin is covered by the embroidery hoop that holds the fabric, and in this state, it is impossible to attach or remove the bobbin on a horizontal hook type embroidery machine, and it is impossible to attach or remove the bobbin on a vertical hook type embroidery machine. However, it was difficult. 2) When it becomes necessary to remove and reinstall the embroidery frame If stitch defects such as skipped stitches or thread tangles occur during embroidery sewing, remove the embroidery frame, remove unnecessary thread, and reinstall the embroidery frame. Installation is necessary when restarting embroidery. However, during embroidery work using a relatively small embroidery frame, the entire embroidery frame often rests on the mechanical work surface of the embroidery machine, and the hands and fingers of the sewing machine user are placed on the underside of the embroidery frame. It was difficult to attach and remove the embroidery frame. Conventionally, in contrast to cases 1) and 2), in case 1), it was difficult to do so with a vertical hook type embroidery machine, but it was necessary to leave the embroidery in that state or remove the embroidery hoop and check the remaining amount of bobbin thread. If you remove the embroidery frame after attaching and detaching the bobbin, reinstall it, and if it is a horizontal hook type embroidery machine, remove the embroidery frame and check the bobbin thread remaining. , install and remove the bobbin, and then reinstall the embroidery frame after completing the work.
The solution was to continue the embroidery work, which was a laborious and time-consuming procedure. In the case of 2), the troublesome and time-consuming procedure is to remove the embroidery frame, remove unnecessary thread and reinstall it, and use the frame back function to continue the embroidery work from the normal position of the seam. t;.

[Means for Solving the Problems and Effects of the Invention] The present invention provides a first needle core in a computer embroidery machine that facilitates checking of the bobbin thread based on the initial setting position of the embroidery frame when the power is turned on. A first storage means that stores the coordinates of the position, a second storage means that stores the coordinates of the second needle core position that makes it easy to attach and detach the embroidery frame, and a needle core that is in the middle of embroidery sewing. a third storage means for updating and storing position coordinates; a first command means for instructing a retreat operation to the first needle core position and a return operation to the third needle core position; and a second needle core. An embroidery frame drive control device is provided with a second command means for commanding an operation to retreat to the position and an operation to return to the third needle center position, and facilitates checking of the bobbin thread during embroidery and attachment and detachment of the embroidery frame. According to the present invention, there is provided a computerized embroidery machine having:
It has the effect of quickly dealing with troubles during embroidery work and allowing embroidery work to be performed smoothly and efficiently. The needle can be retracted to the needle center position No. 1, and at this position, it is possible to easily check the remaining amount of the bobbin thread, replace the bobbin thread bobbin, repair the bobbin thread breakage, etc. After these operations, the needle core can be returned to the third position by operating the key again, so that embroidery can be quickly resumed from the original position. Second, after stopping the embroidery sewing machine, the embroidery frame can be retracted to the second needle core position by operating a key different from the above-mentioned key, and in this position, defective embroidery stitches and thread entanglements can be avoided. The embroidery frame can be easily removed and unnecessary threads can be removed from the fabric. After these operations, the needle can be returned to the third position by operating the function key again, and embroidery can be quickly resumed from the normal position of the stitch by the subsequent 7-remote back operation. It has the effect of being able to do it.

【Example】

The present invention will be explained below using examples. ○Configuration of the embroidery machine First, the configuration of the embroidery machine will be explained with reference to FIG. In the figure, an embroidery machine 10 has a needle 11 that moves up and down, and a thread loop catching means 12 that cooperates with the needle. The embroidery frame 13 that holds the work cloth is a support 1 whose drive is controlled by an X-Y drive mechanism 14 as an embroidery frame drive means.
X-Y in synchronization with the needle ll that is attached to
It is controlled so that it can embroider on processed cloth. Inside the X-Y drive mechanism section 14, there are an X-axis drive pulse motor XM and a Y-axis drive pulse motor YM (see Figure 2).
The mechanism controlled by this, various electronic control circuits, etc. are built-in. A plurality of keys, which will be described later, are arranged in some of the operation keys. Structure of O Control Circuit Next, the structure of the control circuit will be explained with reference to FIG. The central processing unit tcPU is connected to a data bus that transfers commands and embroidery data through two-way communication between the memory module and the I10 device. The read-only memory ROM includes a program area in which a control program for the automatic embroidery sewing machine is stored, and a first area in which coordinates of a first needle center position (described later) unique to multiple embroidery frames are stored. A data area 1 as a storage means, a data area 2 as a second storage means in which coordinates of a second needle core position specific to a plurality of embroidery frames, which will be described later, are stored, and other areas. There is. The random access memory RAM includes a stack area necessary for the CPU to operate, a storage area for flags, and a third memory that updates and stores the coordinates of the third needle center position, which will be described later.
It consists of a working memory area consisting of a Shobara storage area and the like as storage means, and a data area for temporarily storing embroidery data. The 110 ears 9-7--s 110-1 to 110-6 exchange data between the peripheral devices and the CPU. Some of the operation keys include the start key 5 TART key to start embroidery, the stop key 5 TOP key to pause the embroidery process, the NUMERIC key used when selecting patterns, etc. Register the pattern code of the pattern I; memory key MEMOR
Y key, arrangement key for specifying pattern block arrangement information LAYOUT key, size key 5 for specifying pattern block size information, IZE key, hoop for providing instructions for moving the embroidery frame 12 to a position where it can be easily attached and detached. Position key HOOP POS key and bobbin position key B for moving the embroidery frame 12 to a position where it is easy to replace the bobbin thread.
Equipped with OBBIN POS key etc. When a pattern number is input when selecting a pattern, the liquid crystal display device LCD displays the pattern or number, and even displays the pattern number.
Display messages from ll. The floppy disk drive FDD reads out the embroidery data stored in the 70 disk FD under the control of the floppy disk controller FDC, and stores it in the data memory area of the RAM as a pattern data storage means via the data bus. let The sensor 5ENSOR has multiple sensors and is used to obtain various signals for controlling the automatic embroidery machine.These include the needle phase detection sensor 20 that detects the rotational phase of the upper shaft of the sewing machine, and the Thread breakage detection sensor 21. These include a frame position detection sensor 22 that detects the position of the embroidery frame, and a frame type discrimination sensor 23 that detects the type and size of the embroidery frame. The sewing machine motor ZM is a motor that drives the sewing machine. Pulse motor
2 in the XY force directions. The actuator ACT is used to perform other embroidery stitches, and includes, for example, a thread loosening solenoid. ○Explanation of the first, second, and third needle core positions, etc. 1) Embroidery frame reference First, referring to Figure 3, set the embroidery frame as a reference.
, the second and third needle core positions, etc. will be explained. In the figure, the first needle core position P (PX, PY), the second needle core position Q (QX, QY), the third needle core position R (RX,
RY) and sewing start point 5 (SX, SY) are coordinates based on the initial set position (not shown) specific to the embroidery frame when the power is turned on, and the third needle center position R (RX, RY) teeth,
The coordinates are updated as the embroidery progresses. Also, the first needle core position and the second needle core position are in the embroidery frame 1.
These coordinates are unique to the type and size of the embroidery frame 13, and these coordinates are set in response to a signal from the frame type discrimination sensor 23 when the embroidery frame 13 is attached. 2) Needle drop point reference for embroidery sewing machine Next, referring to Fig. 4 which shows an example of a horizontal hook type embroidery sewing machine, the first needle center position and the second needle drop point are determined based on the needle drop point of the embroidery sewing machine. The needle core position will be explained. At the first needle core position, that is, at the position where the first needle core position of the embroidery frame 13 coincides with the needle drop point N of the sewing machine IO, the embroidery frame 13 is moved as indicated by the dashed line in FIG. position 13
(A), check the remaining amount of bobbin thread through the transparent part 17a of the corner plate 17 in front of the throat plate 16, open the corner plate 17 to replace the bobbin thread pobbin 18, and repair the bobbin thread breakage. etc. can be easily performed. When the second needle core position, that is, the second needle core position of the embroidery frame 13 coincides with the needle drop point N of the embroidery sewing machine, the embroidery frame 13
is positioned at the position indicated by the two-dot chain line in FIG. 4, and the sewing machine operator's fingers and the like can be inserted into the lower front side of the embroidery frame 13, making it easy to attach and detach the embroidery frame 13. In FIG. 4, the embroidery frame 13 indicated by a solid line indicates the position of the embroidery frame in the current embroidery work. In this example, the embroidery frame is rectangular in shape, but the remaining bobbin thread amount is also unique to the shape and size of the embroidery frame when the embroidery frame is circular or oval. This book includes the coordinates of the first needle core position, which is convenient for checking, replacing the bobbin thread bobbin 18, and repairing broken bobbin thread, and the coordinates of the second needle core position, which is convenient for attaching and detaching the embroidery frame. The driving control of the embroidery frame 13 can be performed in the same manner as in the embodiment of the invention. Drive control of the embroidery frame Next, drive control of the embroidery frame 12 will be explained with reference mainly to FIG. In the same figure, 5Tn (nl, 2.3") indicates each step of the control. In addition, input the pattern code of the pattern to be embroidered using the NUMERI C-1-- and MEMORY key. and stores it in the working memory area of the RAM.Sr2 Reads the embroidery data corresponding to the manually created pattern code from the 70-piece disk FD and stores it in the data memory area of the RAM.1 Step 1 When the START key is pressed When the 5TART key is pressed, embroidery starts. Sr4 Reads and registers the states of the needle phase detection sensor 20 and thread breakage detection sensor 21.Furthermore, in order to recognize whether the 5TOP key has been pressed, the embroidery starts. Check the status. Sr5 If no bobbin thread breakage is detected and the 5TOP key is not pressed, execute ST6 to ST9 below. Sr6 Drive the sewing machine motor ZM to move the needle bar up and down. Sr7 It is determined whether the needle phase detection sensor 20 has changed from the lower phase to the positive phase, and when the phase has become positive, execute Sr1. If not, proceed to Sr9. Sr8 Embroidery the embroidery frame 13 to form a pattern. Move to the position specified by the data. Sr9 Determine whether embroidery is finished, and if it is finished, send 5TIO
If the process has not finished yet, return to ST4. 5TlO Stops the sewing machine motor ZM and ends the embroidery operation. The above is the embroidery operation when bobbin thread breakage is detected and the 5TOP key is not operated. In ST5, if bobbin thread breakage is detected or the 5TOP key is operated, the process proceeds to 5TII. TII It is determined whether the needle phase detection sensor 20 has changed from the lower phase to the positive phase, and when the needle phase has changed to the positive phase, 5T12 is executed. T12 Stop the sewing machine motor ZM and stop the operation of the embroidery sewing machine. T13 Check the state of the key and execute the function of the present invention; T30BBIN PO5*- or HOOP-POS
Wait for a key to be pressed and determine which key was pressed. T14 HOOP Executed when the POS key is pressed, E! of the current needle core position is executed. ggR (RX, RY) (see Fig. 3) is temporarily stored in the working memory area of the RAM, and the embroidery frame 13 is moved to the second needle core position Q (QX, Q
In order to move the embroidery frame 13 to Y) (see FIG. 3), the amount of movement is calculated and the pulse motors XM and YM for driving the embroidery frame are driven. At this second needle core position, the embroidery frame 13 can be easily removed, and after making necessary repairs such as removing excess thread from defective seams, the embroidery frame can be easily attached. . T15 Original position (third needle core position R (RX, RY) in Fig. 3)
To return to , wait for the HOOP POS key to be pressed again, and if it is pressed, proceed to the next 5T16. Furthermore, as is clear from the flow, 5TA is required in this step.
Even if the RT key is pressed, the embroidery work will not be resumed, ensuring safety. When the T16 HOOP POS key is pressed again, the amount of movement to the third needle center position R (RX, RY) is determined, and the pulse motor XM1YM is driven to return to the third needle center position. Returning to 5T13 again, the frame back function is used to return the embroidery frame 13 to the normal part of the stitch, and by pressing the 5TART key, the embroidery work is resumed. T17 BOBBIN Executed when the POS key is pressed, the seat ring R (RX, RY) (see Fig. 3) at the current needle center position is temporarily stored in the working memory area of the RAM.
Move the embroidery frame 13 to the first needle center position 1tP (which is the bobbin thread exchange position).
In order to move the embroidery frame 13 to PX, PY) (see FIG. 3), the amount of movement is calculated and the pulse motors XM and YM for driving the embroidery frame are driven. At this first needle center position, it is possible to easily check the remaining amount of the bobbin thread, replace the bobbin thread bobbin 18, repair a bobbin thread breakage, etc. T18 Original position (third needle core position R (RX, RY) in Fig. 3)
To return to , wait for the BOBBIN POS key to be pressed again, and if it is pressed, proceed to the next 5T16. As is clear from the flow, similar to 5T15, even if the 5TART key is pressed in the second step, the embroidery work will not be restarted and safety is maintained. When the T16 BOBBIN POS key is pressed, the amount of movement to the third needle center position R (RX, RY) is determined, and the pulse motors XM and YM are driven to return the embroidery frame 13 to the M3 needle center position. . Returns to 5T13 again, the state of the key is checked, and 5TAR
By pressing the T key, the embroidery work is resumed.

【Effect of the invention】

As described above, according to the present invention, it is possible to quickly deal with troubles during embroidery work, and the embroidery work can be performed smoothly and efficiently.More specifically, first, the embroidery sewing machine can be stopped. After letting
The embroidery frame can be retracted to the first needle core position by key operation, and at this position, it is possible to easily check the remaining amount of bobbin thread, replace the bobbin thread pobbin, repair broken bobbin thread, etc. After these operations, the needle core can be returned to the third position by operating the key again, so that the embroidery can be quickly resumed from the original position. Second, after stopping the embroidery sewing machine, the embroidery frame can be retracted to the second needle core position by key operation, and in this position it is easy to move the embroidery frame in case of a defective embroidery stitch or thread tangle. It can be removed at any time, and unnecessary threads can be removed from the processed fabric. After these operations, the needle core can be returned to the third position by operating the key again, and embroidery can be quickly resumed from the normal position of the stitch by subsequent frame pack operation. is obtained.

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention, and FIG.
Chart, Figure 2 is a block diagram of the control circuit of the computerized embroidery machine, Figure 3 is a diagram showing the position of each needle center relative to the embroidery frame, and Figure 4 is a diagram showing the position of each needle center relative to the needle drop point of the embroidery machine. FIG. 5, which shows the state of the embroidery frame at the center position, is a perspective view of the computer embroidery machine. 10 is an embroidery machine, 11 is a needle, 12 is a thread loop catching means, 13 is an embroidery frame, 14 is an XY control mechanism section as an embroidery frame driving means, 15 is a support body, and the BOBBIN POS key is the first
The HOOP POS key is the second command means, P is the first needle core position, Q is the second needle core position, R is the third needle core position, and the data area 1 of the ROM is The first storage means, data area 2 of the ROM is the second storage means,
The working memory area of RAM is a third storage means, RA
The data area M is a pattern data storage means. Patent applicant Janome Sewing Machine Industry Co., Ltd. Figure Figure-1, jllll$1

Claims (1)

[Scope of Claims] A stitch forming means having a needle that moves up and down and a needle thread catching means that cooperates with the needle, an embroidery frame that holds a workpiece cloth, and a support body to which the embroidery frame can be attached and detached; Embroidery frame driving means for driving and controlling a support that changes the relative position of the needle and the embroidery frame, and pattern data storage means for storing stitch data of an embroidery pattern for driving the embroidery frame driving means. , in a computer embroidery machine that sequentially reads stitch data from the storage means in synchronization with the vertical movement of the needle and drives the embroidery frame drive means to perform embroidery stitching, the initial set position of the embroidery frame when the power is turned on is set. A first storage means that stores the coordinates of a first needle drop position that makes it easy to check the bobbin thread as a reference, and stores coordinates of a second needle drop position that makes it easy to attach and detach the embroidery frame. a second storage means for updating and storing the coordinates of the needle drop position during embroidery sewing, and a retraction operation to the first needle drop position and a retraction operation to the third needle drop position An embroidery frame moving device comprising a first command means for commanding a return operation, and a second command means for commanding a retreat operation to the second needle drop position and a return operation to the third needle drop position. A computer embroidery machine characterized by: