JP2000271360A - Sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability by providing a back trace executing means for moving in a direction opposite to a moving direction when executing a trace mode. SOLUTION: When executing a trace mode with mask data in the state of raising a needle, an operator judges whether or not the tracing position of the needle is settled inside of a fabric supporting frame while confirming a relative position between the needle and a fabric-supporting frame with eyes. When a STOP key 18b is operated in the middle of executing a trace routine, a CPU executes a trace stopping routine, and while the operator operates an arrow key 18d pointing to a left side in the trace stopping routine, it executes back trace. When the operation of the key 18d pointing to the left side is released, since back trace is not executed, execution of back trace is instantly switched to non-execution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine capable of sewing a work cloth supported in a cloth support frame, and more particularly to a sewing machine for checking whether a sewing area of a pattern is within a range of the cloth support frame before sewing. The sewing machine that can execute a trace mode.

[0002]

2. Description of the Related Art Conventionally, there is a sewing machine, such as an embroidery sewing machine, which presses a work cloth using a cloth support frame and sews the work cloth in the cloth support frame. The sewing area of such a sewing machine is
The area varies depending on the cloth support frame used, and the embroidery sewing area differs depending on the data.Therefore, before actually sewing with the sewing needle, the operator checks the area where the embroidery sewing area fits within the cloth support frame. Is being done. As an area check method, a trace mode that moves the cloth support frame on which the work cloth is set along the trace data and checks the relative distance between the cloth support frame and the embroidery needle is widely adopted because the sewing machine head does not move. ing. In the trace mode, tracing is normally performed with the sewing needle raised to prevent the sewing needle from colliding with the cloth support frame.

[0003] In the case of the conventional tracing, since the mask data is traced at a stretch at a constant speed, it is difficult to determine when the cloth support frame and the mask data are close to each other.
The same data had to be traced and confirmed many times. On the other hand, Japanese Patent Application Laid-Open No. Hei 9-137165 discloses a method of controlling a trace speed by a program for changing a trace speed according to a positional relationship such as a distance between mask data and a cloth support frame, thereby enabling more accurate and quick trace. Proposed.

[0004]

However, the tracing is performed visually by an operator, and there is an individual difference in the proficiency. However, in the conventional tracing method, the tracing is performed by a program. It was difficult to change the speed. Also, if it is necessary to confirm the portion that has passed during tracing, the tracing must be restarted from the beginning.

The present invention has been made in view of the above problems, and provides a sewing machine excellent in operability by enabling the tracing direction to be reversed during execution of a tracing mode. An object of the present invention is to provide a highly operable sewing machine by temporarily changing a trace speed or temporarily stopping a trace mode during execution of a trace mode.

[0006]

In order to achieve this object, a sewing machine according to the first aspect of the present invention moves a vertically movable sewing needle and a support frame for supporting a work cloth relative to each other. A sewing machine capable of sewing a pattern on a work cloth by moving the sewing needle and the support frame in a predetermined moving direction along a predetermined path of a sewing area of the pattern in a state where the sewing needle is separated from the work cloth. Back trace execution means for moving in a direction opposite to the moving direction when executing the trace mode is provided.

By providing such back trace execution means, in order to prevent the sewing needle from colliding with the support frame, a trace mode execution in which the sewing needle and the support frame are relatively moved while the sewing needle is separated from the work cloth. In this case, when it is difficult for the operator to recognize the trace position of the sewing needle in the support frame, by back-tracing in the direction opposite to the predetermined moving direction, the trace position in the support frame can be accurately recognized, Tracing with high operability is possible.

According to a second aspect of the present invention, there is provided the sewing machine according to the first aspect, wherein the back trace executing means executes the back trace only while the operation member for execution is being operated. Features. Thereby, while the operator is operating the operation member for execution, while the back trace execution means executes the back trace,
When the operation of the execution operation member is released, the back tracing is not executed, so that execution / non-execution of the back tracing is immediately switched, thereby improving the operability of the sewing machine.

According to a third aspect of the present invention, there is provided the sewing machine according to the first or second aspect, wherein the first specifying means for specifying execution of the trace mode, and the back trace for executing the back trace. A second designating means for designating a mode. Thus, when the operator specifies execution of the trace mode using the first specifying means, the sewing needle and the support frame relatively move in a predetermined moving direction along a predetermined path. Further, when the operator specifies execution of the back trace mode using the second specifying means, the sewing needle and the support frame relatively move in a direction opposite to the predetermined moving direction. Thereby, it is possible to freely select in which direction to trace, and the operability of the sewing machine is improved.

According to a fourth aspect of the present invention, there is provided the sewing machine according to any one of the first to third aspects, wherein the back tracing executing means is configured to operate while the speed changing operation member is being operated. Only, the speed of the back trace is changed. Thereby, while the operator is operating the operation member for speed change, the back trace execution means changes the speed of the back trace, while the operator cancels the operation of the operation member for speed change, Since the speed of the back trace is not changed, whether to change the speed of the back trace is immediately switched, and the operability of the sewing machine is improved.

A sewing machine according to a fifth aspect is the sewing machine according to any one of the first to fourth aspects, wherein the back tracing execution means is configured to operate the speed designation operation member. It is characterized in that the back trace speed is specified. Thereby, the back trace execution means specifies the speed of the back trace by operating the speed specifying operation member by the operator, so that the back trace can be performed at the speed desired by the operator, and the operability of the sewing machine is improved. .

A sewing machine according to a sixth aspect of the present invention is the sewing machine according to any one of the first to fifth aspects, wherein the back tracing executing means operates the deceleration operating member near the direction change position. By doing so, the speed of the back trace near the direction change position of the relative movement is reduced. Thus, the operator operates the deceleration operation member near the direction change position, and the back trace execution means reduces the speed of the back trace near the relative movement direction change position. It can be easily recognized, and the operability of the sewing machine is improved.

According to a seventh aspect of the present invention, there is provided the sewing machine according to any one of the first to sixth aspects, wherein the back tracing execution means operates the stop operation member at the next stop position. Thus, the relative movement is stopped at the next stop position. Thereby, the operator operates the stop operation member at the next stop position,
Since the back trace execution means stops the relative movement at the next stop position, the trace position in the support frame can be easily recognized in the stopped state, and the operability of the sewing machine is improved.

The sewing machine according to claim 8 is the sewing machine according to any one of claims 1 to 7, wherein the back trace executing means operates an operation member for designating a stop position. Is used to specify the stop position of the relative movement. Accordingly, the back trace execution means stops the relative movement at a predetermined position by operating the operation member for specifying the stop position, so that the trace position can be easily set in a state where the operator stops at the desired position. It can be recognized, and the operability of the sewing machine is improved.

According to a ninth aspect of the present invention, there is provided a sewing machine capable of sewing a work cloth by relatively moving a sewing needle that can move up and down and a support frame that supports the work cloth along a predetermined path. In a trace mode in which the sewing needle and the support frame are relatively moved in a predetermined moving direction along a predetermined path while the sewing needle is separated from the work cloth, the operation member for changing the speed is operated. It is characterized in that a speed changing means for changing the tracing speed is provided only during the interval. By providing the speed changing means for changing the tracing speed only while the operation member for changing the speed is operated, the sewing needle is separated from the work cloth in order to prevent the sewing needle from colliding with the support frame. In the state, when executing the trace mode in which the sewing needle and the support frame are relatively moved, when it is difficult for the operator to recognize the trace position of the sewing needle in the support frame,
By changing the trace speed to slow down,
The trace position in the support frame can be easily recognized. In addition, when the operation of the operation member for changing the speed is released, the tracing speed is not changed, so that the execution or non-execution of the change of the tracing speed is easily switched, and the operability of the sewing machine is improved.

A sewing machine according to a tenth aspect of the present invention is a sewing machine capable of sewing a work cloth by relatively moving a sewing needle that can move up and down and a support frame that supports the work cloth along a predetermined path. In a trace mode in which the sewing needle and the support frame are relatively moved in a predetermined moving direction along a predetermined path while the sewing needle is separated from the work cloth, the operation member for specifying the stop position is operated. Only in this case, a trace stopping means for stopping the relative movement is provided. By providing the trace stop means for stopping the relative movement only when the operation member for specifying the stop position is operated, the sewing needle is separated from the work cloth in order to prevent the sewing needle from colliding with the support frame. In the trace mode in which the sewing needle and the support frame are relatively moved in a state where the sewing needle has been moved, when the operator does not easily recognize the trace position of the sewing needle in the support frame, the relative movement is stopped to thereby stop the trace in the support frame. The position can be easily recognized. If the operation member for specifying the stop position is not operated,
Tracing does not stop. As a result, execution / non-execution of the stop of the trace is easily switched, and the operability of the sewing machine is improved.

In the sewing machine according to the ninth aspect, the speed changing means may change the speed of the trace by operating the operation member for specifying the speed.
Thus, the tracing speed is specified by the operator operating the speed specifying operation member, so that the tracing can be performed at the speed desired by the operator. Also,
In the sewing machine according to the ninth aspect, the speed changing unit may reduce the speed of the trace near the direction change position of the relative movement by operating the deceleration operation member near the direction change position. . Thus, the operator operates the deceleration operation member near the direction change position to reduce the trace speed near the relative movement direction change position, so that the trace position in the support frame can be easily recognized. .

In the sewing machine according to the tenth aspect, the trace stop means may stop the relative movement at the next stop position by operating a stop operation member at the next stop position. Thereby, the operator operates the stop operation member at the next stop position,
Since the relative movement is stopped at the next stop position, the trace position in the support frame can be easily recognized in the stopped state.
In the sewing machine according to the tenth aspect, the trace stop unit may specify the stop position of the relative movement by operating an operation member for specifying the stop position. Thus, the relative movement is stopped at a predetermined position by operating the operation member for specifying the stop position, so that the operator can easily recognize the trace position in the support frame in a state where the operator stops at the desired position. be able to.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the sewing machine of the present invention is embodied in a multi-head embroidery sewing machine M will be described below. FIG. 1 is a perspective view showing the appearance of a multi-head embroidery sewing machine M according to the present embodiment. In the embroidery sewing machine M, as shown in FIG. 1, a sewing machine support 2 is fixedly provided on the rear side of the upper surface of a base frame 1 which is long in the left-right direction (X direction). The support frame 3 extending in the left-right direction is erected.

Above the base frame 1 located at the front end of the sewing machine support 2, heads 4 to 6 are provided, and at the lower position corresponding to the heads 4 to 6, a cylindrical bed 7 is provided. To 9 are provided. Therefore, an embroidery sewing machine M1 is constituted by the head section 4 and the bed section 7. Similarly, the embroidery sewing machine M2 is constituted by a head section 5 and a bed section 8, and the embroidery sewing machine M3 is constituted by a head section 6 similarly. And a bed 9. At the front end side of each of the heads 4 to 6, a needle bar case 10 movable in the left-right direction is provided. The needle bar case 10 supports 12 needle bars 11 arranged in one row in the left-right direction so as to be movable up and down, and also supports 12 balances 12 so as to be movable.

Each needle bar case 10 is simultaneously moved in the left and right direction by a needle bar changing mechanism (not shown) for changing the needle bar, so that it can be simultaneously changed to another upper thread having a different color. On the front side of the sewing machine support 2, a work table 13 is provided horizontally so as to be flush with the upper surfaces of the beds 7 to 9. A pair of auxiliary tables 14 and 15 are provided on both left and right sides of the work table 13, respectively.
A rectangular movable frame 16 in a plan view extending in the left-right direction is mounted on the entirety of the auxiliary tables 14 and 15 and the work table 13. The driving frame 16a on the right end and the driving frame 16b on the left end of the movable frame 16 are X
It is moved in the X-axis direction (the left-right direction in FIG. 1) by a shaft drive mechanism (not shown), and the Y-axis drive mechanism (not shown).
Is moved in the Y-axis direction (the front-back direction in FIG. 1).

Each of the embroidery sewing machines Ml to
Since the cloth holding frame 16c as a supporting frame corresponding to M3 is attached, the moving frame 16 is moved on the XY plane by the X-axis driving mechanism and the Y-axis driving mechanism, so that the cloth holding frame is moved. 16c is also movable in the X-axis and Y-axis directions. A bobbin C1 is rotatably mounted on a bobbin table C0 mounted on the upper portion of the sewing machine support 2, and an upper thread C2 supplied from the bobbin C1.
Is supplied to the needle bar 21 side described below through the corresponding balance 12 and the like. Further, on the rear side of the auxiliary table 15, a liquid crystal display 1 for displaying a message regarding embroidery sewing is provided.
7. An operation panel 18 provided with a plurality of switches (not shown) and the like is provided.

Next, the needle bar vertical movement mechanism K1 provided for each of the embroidery sewing machines M1 to M3 will be briefly described with reference to FIG. FIG. 2 is an enlarged perspective view showing the needle bar 21 and the needle bar vertical mechanism K1 in the embroidery sewing machine M. This needle bar vertical movement mechanism K1 moves the needle bar 21 up and down in synchronization with the sewing machine spindle 19, and moves the sewing needle 22 attached to the lower end of the twelve needle bars 21 up and down. Let it. On the rear side in the needle bar case 20, a sewing machine main shaft 19 is disposed in the left-right direction through the respective head portions 4 to 6. An eccentric cam 32 is attached to the sewing machine main shaft 19.
Further, a lower end portion of an eccentric lever 33 externally fitted to the eccentric cam 32 is connected to the swing lever 30.

At the tip of each of the heads 4 to 6, a base needle bar 26 extending in the vertical direction is provided.
Is supported by a frame in the needle bar case 10 at its upper end and lower end. A vertically movable member 27 having an engagement groove 27a to be engaged with a connecting pin 34 described later is inserted into the base needle bar 26 so as to be vertically movable, and a needle holder provided at a lower end portion of the vertically movable member 27 is provided. Reference numeral 28 is connected to a link 31 connected to the tip of a swing lever 30 that is movably supported by a pivot 29. A connecting pin 34 is fixed to a substantially middle portion of each needle bar 21 in the height direction, and a compression spring 35 is externally fitted between the connecting pin 34 and the support frame 10 a of the needle bar case 10. Needle bar 2
1 is always elastically urged to the upper needle position by the compression spring 35.

Further, when the needle bar case 10 moves in the left-right direction, the connecting pin 34 of the needle bar 21 facing the vertical moving member 27 is selectively engaged with the engaging groove 27a of the vertical moving member 27. It has become so. Thereby, the sewing machine main shaft 19 is rotated by the rotation drive of the sewing machine motor 80 shown in FIG. The needle bar 21 connected to the vertically moving member 27 via the connecting pin 34 along with the vertical movement of the needle bar 21
Reciprocates up and down in synchronization with the main shaft 19 of the sewing machine.

Here, the needle bar jump mechanism 40 provided in each of the embroidery sewing machines M1 to M3 will be described with reference to FIG. The needle bar jump mechanism 40 is used when the needle bar 21 is caused to jump to its uppermost position (top dead center position) and the needle bar 21 connected to the up-and-down moving member 27 is changed. In the needle bar case 10, a horizontally oriented needle bar jump solenoid 41 is provided, and a substantially L-shaped rotation lever 42 in plan view is attached to the needle bar case 10 so as to be rotatable around a vertical axis. ing.

The driving section 42 of the rotating lever 42
a comes into contact with the plunger of the needle bar jump solenoid 41, and the vertical operation shaft 43 attached to the driven portion 42b engages with the protruding engaging portion 27b formed integrally with the vertical moving member 27. It is possible. Further, the vertically moving member 27 is rotatable between a normal connection position indicated by a solid line and a jump position which is rotated from the connection position by a predetermined angle in a counterclockwise direction in plan view. Is always urged to rotate from this jump position to the normal connection position.

Thus, when the needle bar 21 is connected to the up / down moving member 27 via the connecting pin 34, the needle bar jump solenoid 41 is driven for a predetermined time, and the plunger advances rightward. When the rotation lever 4
2 rotates clockwise in plan view, and simultaneously the vertical movement member 27 rotates to the jump position via the operation shaft 43 and the engagement portion 27b, and the connection pin 34 and the engagement groove 27a. The needle bar 21 is simultaneously disengaged from the compression spring 8.
By means of 5, the needle is raised (jump operation) to the needle position at a stretch.

On the other hand, when the needle bar 21 has jumped to the needle upper position and the vertical moving member 27 has returned to the connection position, the vertical moving member 27 rises from below to the direction of its substantially uppermost position. Sometimes, the vertical moving member 27 is
4, but temporarily pivots to the jump position, but immediately returns to the coupling position by the winding spring 44, and the coupling pin 84 is automatically coupled to the engagement groove 27a. ing. Here, the presser foot 45 provided in each of the beds 7 to 9 is moved by a presser foot driving mechanism (not shown).
A pressing position for pressing the work cloth C3 on the bed portions 7 to 9;
It can be switched up and down between the evacuation position, which has risen a predetermined distance.

The beds 7 to 9 will be described with reference to FIGS. FIG. 3 is an enlarged plan view showing a work table of the embroidery sewing machine M. FIG. 4 is an enlarged plan view showing the tip of the bed frame 1 of the embroidery sewing machine M. FIG. 5 is an enlarged front view showing the rotary hook 55 provided on the bed frame 1 of the embroidery sewing machine M. A bed case 50 having a substantially U-shaped cross section extends in the front-rear direction, and a pair of support brackets 51 whose rear ends are fixed to the base frame 1 located on the front end side of the sewing machine support base 2.
Attached to. On the front end side of the base frame 1 is provided a full rotary hook 55 for catching a thread wheel. The full rotary hook 55 rotates in synchronization with the sewing machine main shaft 19 by receiving rotation of the rotary hook shaft 56. It has become. Also,
The upper side of the bed case 50 is covered with a needle plate 52 at a front end portion thereof, and is covered with a cover plate 53 connected to the needle plate 52. The needle plate 52 has a needle hole 52.
a is formed.

Next, the thread cutting mechanism 60 provided in each of the beds 7 to 9 will be described with reference to FIGS. The thread cutting mechanism 60 includes an upper thread C2 and a lower thread C4 shown in FIG.
And when the upper thread C2 is replaced,
Alternatively, the upper thread C connected to the work cloth C3 at the end of the embroidery sewing
It operates when cutting 2 and the lower thread C4. The needle plate 5
A movable blade 61 is pivotally supported on the lower surface of the second blade 2 between a standby position indicated by a solid line in FIG. 4 and a rotation position indicated by a two-dot chain line. Then, in cooperation with the movable blade 61, the upper thread C
The fixed blade 62 for cutting the lower thread 2 and the lower thread C4 is attached to the lower side of the needle plate 52 so as to face the upper side of the movable blade 61.

The thread cutting operation lever 63 connected to the movable blade 61 extends backward through the inside of the bed case 50. When the thread cutting motor 64 provided at the left end of the base frame 1 shown in FIG. 3 is driven, the thread cutting operation shaft is driven through the swing of a fan-shaped swing member 66 meshing with the driving gear 65. 67 moves in the left-right direction, and the thread cutting operation lever 63 is driven in the front-rear direction via the rotating plate 68.
As the movable blade 61 is rotated by the driving of the operating lever 63, the fixed blade 62 and the movable blade 61 simultaneously cut the upper thread C2 and the lower thread C4.

Next, the control device 7 of the multi-head type embroidery sewing machine M
0 will be described with reference to FIG. FIG. 6 is a block diagram of the control device 70 according to the embodiment. As shown in FIG. 6, the multi-head type embroidery sewing machine M includes an operation panel 18 having the display 17, a driving circuit 81 for driving a sewing machine motor 80, and a driving circuit 87 for driving an X-axis driving motor 86. , A drive circuit 89 for driving a Y-axis drive motor 88, and a drive circuit 85 for driving a needle bar changing motor 84 for changing the needle bar by moving the needle bar case 10.
And a drive circuit 90 for driving the thread cutting motor 64. These drive circuits 81, 85, 86, 8
7, 90 are connected to the control device 70, respectively.
The control device 70 includes a CPU 71, a ROM 72, and a RAM 73.
2 and the RAM 73 are connected to an input / output interface (not shown) via a bus such as a data bus.

The ROM 72 stores embroidery data for each of a large number of embroidery patterns, an embroidery control program for driving the Y-axis drive motor 88 and the X-axis drive motor 86 based on the embroidery data to perform embroidery, It stores data necessary for mode control. Also, R
The AM 73 is provided with various memories 73 a including a work memory for storing embroidery data required for embroidery sewing of an embroidery pattern, and various memories for temporarily storing a calculation result of the movement amount of the movable frame 16 calculated by the CPU 71. Since the memory 73b and the like are provided, the data stored in the memories 73a and 73b are taken out by the CPU 71 as needed and used for sewing work, execution of the trace mode, and the like.

Further, regarding the head portion 4, the needle bar case 1
0, a drive circuit 76 for the needle bar jump solenoid 41 for the needle-specific jump mechanism 40, a drive circuit 78 for the presser foot drive solenoid 77 for retreating the presser foot 45, and a thread break sensor. The driving circuits 76 and 78 and the thread break sensor 79 are provided in the control device 7.
Connected to 0. Similarly, the heads 5 and 6 are provided with solenoids 41 and 77, a drive circuit 78, and a thread break sensor 79, respectively.

The thread break sensor 79 is for detecting that the upper thread C2 has broken.
CPU 71 generates data for executing the thread trimming operation based on the output of. Specifically, an encoder disk (not shown) provided in the yarn path of the upper thread C2 is rotatably supported by the frame, and the upper thread C2 is wound around a rotation drive unit of the encoder disk. Since the breakage sensor 79 is provided so as to face the encoder disk, the yarn breakage sensor 79 outputs an encoder signal via the encoder disk that rotates with the advance of the upper thread C2 in each sewing cycle, and no yarn breakage occurs. As long as the encoder signal is input to the CPU 71.

Further, the control device 70 includes a sewing machine spindle 19.
A pulse generator 82 that outputs an encoder signal composed of 1000 pulse signals per rotation of a disk encoder provided in the disk drive; a spindle origin sensor 83 that outputs one spindle synchronization signal with one rotation of the disk encoder; An operation panel 18 having a display 17 is connected.

The motors 64, 80, 84, 86, and 86 are stored in the ROM 72 based on an encoder signal from a pulse generator 82 and a spindle synchronization signal from a spindle origin sensor 83.
A control program for driving control of the drive 88, a program for executing a trace mode to be described later, a back trace in the trace mode, a program for changing a trace speed, and temporarily stopping the program are stored.

Next, the operation panel 18 will be described.
FIG. 7 is an enlarged plan view showing the operation panel 18. As shown in FIG. 7, the operation panel 18 includes a confirmation key 18a for making various decisions, a STOP key 18b for temporarily stopping the trace, a delay key 18c for temporarily delaying the trace speed, Arrow keys 18d pointing up, down, left, and right for selecting a tracing speed and a tracing direction, and numeric keys 1 for selecting a stop position
8e, a trace execution key 18f is provided. However, the function may be performed by something other than these keys, for example, a mouse operation or other operation.

Here, the needle bar changing motor 84 moves the needle bar case 10 right and left, so that the needle bar 21 to be used can be used.
Is selected, the selected needle bar 21 is always at the same position with respect to the embroidery sewing machines M1 to M3. That is, the movable frame 16
, The relative position between the cloth support frame 16c and the sewing needle 22 is determined. The X-axis drive motor 86 and the Y-axis drive motor 88 are pulse motors, and are fed by about 0.1 mm for each pulse applied to the pulse motor. That is, the cloth support frame 16c moves about 0.1 mm in the X-axis or Y-axis direction with respect to the sewing needle 22 for each pulse. In the case of this embodiment, the movable frame 16 moves in the front-rear and left-right directions with respect to the sewing needle 22 without moving the sewing needle 22 in the front-rear and left-right directions.
The description will be made assuming that c stops and the sewing needle 22 moves in the front, rear, left, and right directions with respect to the cloth support frame 16c.

Next, the cloth support frame 16c and the mask data 96
The relationship with the like will be described. FIG. 8 is an explanatory diagram showing an example of a pattern to be embroidered by the embroidery sewing machine M. FIG. 9 shows the cloth support frame 1.
It is a figure which expands and shows 6c. FIG. 10 is an explanatory diagram showing the order of tracing. When the pattern 95 shown in FIG. 8 is embroidered using the cloth support frame 16c shown in FIG. 9, the embroidery sewing machine M is completely embroidered with the cloth 95 before actually sewing using the sewing needle 22. It is checked whether it is within the frame 16c. This is because if sewing is started in a state where the sewing needle is not settled, the sewing needle 22 collides with the cloth support frame 16c, and the sewing needle 22 may be broken in some cases. Here, the cloth support frame 16c shown in FIG. 9 is substantially rectangular, and the rectangular mask data 9 that completely covers the pattern 95 in FIG.
Use 6. Then, when executing the trace mode in which the sewing needle 22 is raised and the mask data 96 moves relatively as shown in FIG. 10, the operator visually checks the relative position between the sewing needle 22 and the cloth support frame 16c. While checking, it is checked whether or not the trace position of the sewing needle 22 is within the cloth support frame 16c.

When the pattern 95 is sewn from the sewing start position 95s, the trace start position 96s in FIG.
Corresponds to the sewing start position 95s. Here, the trace route is a point 96c → 9 from the trace start position 96s in FIG.
Since the order is 6d → 96b → 96a → 96c, the back trace route is 96c → 96a → 96b → 96d → 9
6c. Each point 96a, 96b, 96 in FIG.
c and 96d are called corners, and since the direction of the trace changes at these corners, it is desirable to slow down or temporarily stop the tracing speed. Next, the tracing operation of the embroidery sewing machine M having the above configuration will be described with reference to the flowcharts of FIGS. Each embroidery machine M1, M2, M3
Are the same, therefore, one device will be described as a representative here. It is also assumed that all the pre-processing such as reading of the trace mask data 96, setting of the work cloth C3 on the cloth support frame 16c, and designation of the trace start position 96s has been completed.

Here, when the operator operates the trace execution key 18f of the operation panel 18, the full-width deceleration, the next corner stop, and the number designated corner stop are displayed on the liquid crystal display 17, and any one of these displays is displayed. By touching, a trace mode that enables full-angle deceleration, next corner stop, and number-designated corner stop is selected. FIG. 11 shows a mode selection routine for selecting a mode of the embroidery sewing machine M.
FIG. 12 shows a trace routine that is executed when a corner stop or the like is not specified. 13 and 14,
And FIG. 15 is executed when full-width deceleration, next corner stop, number-designated corner stop, etc., are designated at the time of mode selection. FIG. 13 shows full-width deceleration near all corners. Part deceleration routine (S105 in FIG. 11, where S indicates a step), and FIG. 14 shows a next corner stop routine for temporarily stopping at a corner first reaching from a designated position (S105 in FIG. 11).
106) and FIG. 15 show a number-designated corner stop routine (S107 in FIG. 11) for temporarily stopping at a corner designated by a number. FIG. 16 shows a tracing stop routine executed when the tracing is paused. In the tracing stop routine, a back trace for tracing in the direction opposite to the trace traveling direction can be executed. FIG.
A stop time change routine for changing the trace speed by setting a delay time when the delay key 18c is operated is shown. Note that the CPU 71 can trace in the direction opposite to the trace traveling direction in the trace stop routine in FIG.

First, the stop time changing routine shown in FIG. 17 will be described. This stop time change routine is a time t to be temporarily stopped when the delay key 18c is operated.
(Seconds). In addition, the operator
During or before the execution of the trace mode, the stop time changing routine may be executed. CPU7
First, as shown in FIG. 17, first, the initial value of the stop time t is displayed on the display 17 (S701). If the displayed stop time is sufficient, the operator presses the confirmation key 18a.
(YES in S702), and the CPU 71 ends the stop time change routine. If the confirmation key 18a is not operated (NO in S702), the CPU 71 checks whether the arrow key 18d pointing up or down has been operated (S703, S704).

When the operator operates the arrow key pointing upward (YES in S703), the CPU 71 reduces the stop time t by 50 msec (S705) and displays the effect (S701). Also, when the operator operates the arrow key pointing to the lower side (NO in S703, S704
YES), the CPU 71 increases the stop time t by 50 msec (S706), and displays the fact (S701).
Thereby, the stop time t can be increased or decreased every 50 msec. Therefore, the operator repeats these modes until the desired stop time t is displayed (S701), and the desired stop time t is displayed. In this case, the user operates the confirmation key 18a (YES in S702). As described above, the arrow key 18d is used by the operator to point upward or downward.
By operating, the stop time t of the trace can be adjusted and the stop time t at the time of tracing or back tracing can be designated, so that tracing or back tracing can be performed at a speed desired by the operator. Thereby, S
The arrow key 18d pointing to the upper side or the lower side executed in 703 and S704 corresponds to the speed specifying operation member according to the fifth aspect.

When the operator operates the trace execution key 18f to select the trace mode as described above,
The CPU 71 executes the flowchart shown in FIG. When the operator selects full-width deceleration (S10
1: YES), the CPU 71 executes a full-width part deceleration routine (S105). Full corner deceleration means the vicinity of each corner,
For example, it means that the tracing speed is reduced in each of ten pulses before and after the corner 96a. When the next corner stop is selected (S102: YES), the CPU 71
A next corner stop routine is executed (S105). The next corner stop is the corner 96c that first arrives from the designated time point
Etc. means to pause. During the trace execution along the mask data 96, for example, the point 9 in FIG.
If the next corner stop is instructed while tracing 6e, the next corner 96b is temporarily stopped.

If the number-designated corner stop is selected (S103: YES), the CPU 71 executes a number-designated corner stop routine (S107). The number designation corner stop means that the operator designates the position of the corner 96c or the like to be temporarily stopped by a number. For example, when tracing is performed along the mask data 96, when tracing is performed,
The point 96c of FIG. 1 is number 1, the point 96d of FIG.
If the point 96b of 0 is set as a number 3 or the like, and it is desired to stop at the point 96d during execution of the trace along the mask data 96, the operator inputs the number 2 from the numeric key 18e of the operation panel 18. Instruct. Then, when the operator does not designate the full-angle part deceleration (S101), the next corner part stop (S102), and the designated number corner stop (S103) shown in FIG. 11 (NO in S101, NO in S102, S1
03, NO), the CPU 71 executes the trace routine (S10
4, FIG. 12).

Next, the trace routine shown in FIG. 12 will be described. In this trace routine, the CPU 71
First determines whether or not the trace has been completed (S
201). After tracing to the trace end position (S2
01 (YES), the trace routine ends, and the entire program shown in FIG. 12 ends. When it is not the trace end position (NO in S201), the CPU 71 sets the cloth support frame 1
6c is relatively moved and traced for the minimum section (S202). Here, the minimum section is one pulse of the pulse motor for moving the movable frame 16 (cloth support frame 16c), and the X-axis drive motor 86 or Y is equivalent to one pulse.
This means a section in which the shaft drive motor 88 is driven to move about 0.1 mm in the X-axis direction or the Y-axis direction. STO
When the P key 18b is not operated (NO in S203),
Alternatively, when the delay key 18c is not operated (S
204 (NO at S2) until the end of the trace is reached (S2
01 (YES in step S20).
1 to S204) are repeated.

Also, during execution of the trace routine of FIG. 12, the STOP key 18b is not operated (N in S203).
O) When the delay key 18c is operated, YE is determined in S204.
The CPU 71 stops tracing for t seconds (S
206). During t seconds, the user operates the confirmation key 18a in the flowchart of FIG. 17 (YE in S702).
S) The set time. By stopping the trace for t seconds during the execution of this trace routine,
As a result, the tracing speed is reduced,
The operation of the delay key 18c for executing S204 in FIG.
This corresponds to an operation for changing the speed described in claims 4 and 9. Thereby, while the operator lowers the tracing speed while operating the delay key 18c, when the operation of the delay key 18c is released, the tracing speed does not decrease. Is immediately switched, and the operability of the sewing machine M is improved.

When the STOP key 18b is operated during the execution of the trace routine shown in FIG.
The state becomes ES, and the CPU 71 executes the trace stopping routine (S205, FIG. 16). Here, the trace stop routine shown in FIG. 16 will be described. In this routine, the trace is temporarily stopped, and the trace is moved back and forth by operating the arrow keys 18d pointing to the left or right side in FIG. As shown in FIG. 16, the CPU 71 determines whether or not the current position is the trace end position (S601).
If it is the last position (YES in S601), the trace ends. If it is not the trace end position (N in S601
O), the CPU 71 operates the arrow keys 18 pointing to the left or right side.
d (S602, S603), the confirmation key 18a (S60
Check the operation of 4). When the arrow key 18d indicating the left side or the right side is not operated (NO in S602, NO in S603) and the confirmation key 18a is operated (YES in S604), the CPU 71 ends the trace stop routine.

In the trace stop routine,
The operator operates the left arrow key 18d (S6).
02 (YES at 02) and if the delay key 18c is not operated (NO at S605), the CPU 71
Back trace along the minimum section along
7). When the operator operates the arrow key 18d indicating the left side (YES in S602) and operates the delay key 18c (YES in S605), the CPU 71 traces the trace for the time t set in the routine of FIG. By stopping (S606), the tracing speed is reduced, and the back tracing is performed along the mask data 96 for the minimum section (S607). Further, in the trace stop routine, if the operator operates the arrow key 18d pointing to the right (YES in S603) and does not operate the delay key 18c (NO in S608), the CPU 71 sets the minimum value along the mask data 96. Move forward by the section (S61
0). When the operator operates the arrow key 18d pointing to the right (YES in S603) and operates the delay key 18c (YES in S608), the CPU 71 stops the trace for t seconds (S609). The speed is reduced, and the vehicle advances by the minimum section along the mask data 96 (S610). Hereinafter, the CPU 71 repeats S601 to S610 described above.

As described above, in the trace stop routine shown in FIG. 16, the back trace can be performed by operating the left arrow key 18d.
8d corresponds to the execution operation member of claim 2 and the second specifying means of claim 3. Thus, while the operator operates the arrow key 18d pointing to the left side, the back trace is executed, whereas when the operation of the arrow key 18d pointing to the left side is released, the back trace is not executed. Execution / non-execution is switched immediately, and the embroidery sewing machine M is improved in usability. Further, the arrow key 18d pointing to the right side corresponds to the first designating means of claim 3. As a result, in the trace stop routine shown in FIG.
When the operation of the arrow key 18d pointing to the right side is released while tracing is being performed, the tracing is not executed. Therefore, the execution / non-execution of tracing is immediately switched, and the embroidery sewing machine M is operated. Operability is improved.

Next, a case in which full-width deceleration is selected in the mode selection routine of FIG. 11 (YES in S101) will be described. At this time, the CPU 71 executes S105 in FIG. 11 and executes the full-width part deceleration routine in FIG. FIG.
At the trace end position (YE at S301)
S), the CPU 71 ends the trace. When it is not at the trace end position (NO in S301), the CPU 71
P key 18b (S302), delay key 18c (S30
Check the operation of 3). When the STOP key 18b is operated (YES in S302), the CPU 71 executes a trace stop routine (S304) (FIG. 1).
6). The STOP key 18b is not operated (N in S302).
O), when the delay key 18c is operated (YES in S303), the CPU 71 stops the trace for the time t set in the routine of FIG. 17 (S305).

Further, in the case of NO in S303, or after execution of S305, it is checked whether or not the current trace position is near a corner (S306). Here, 1 before and after the corner
0 pulse is set as the neighborhood, and if it is the neighborhood (YE in S306)
S) Stop for 1 second for each pulse (S307). That is, when moving to the corners 96c, 96d, 96b, 96a, 96c, these full-width portions 96c, 96d, 96
Stop for 1 second for each pulse near b, 96a, 96c. Subsequently, the CPU 71 moves the cloth support frame 16 c by the minimum section (for one pulse) according to the mask data 96 (S 308), thereby decelerating the tracing.
1 returns to S301. If it is not near the corner (S
(NO in 306), the cloth support frame 16c is moved by the minimum section (for one pulse) without deceleration (S308). Hereinafter, the CPU 71 continues to reach the final trace position (S
301: YES), the above operation is repeated. As described above, the operator can select the full-width deceleration mode by touching the full-width stop display on the liquid crystal display 17,
Further, by pressing the confirmation key 18a, the trace speed near the position where the relative movement of the trace is changed is reduced, so that the trace position in the cloth support frame 16c can be easily recognized. Therefore, the confirmation key 18a or the like operated at the time of selecting the mode in FIG. 11 corresponds to the deceleration operation member near the direction change position.

Next, a case where the next corner stop is selected in the mode selection routine of FIG. 11 (YES in S102) will be described. At this time, the CPU 71 executes S106 of FIG. 11 and executes the next corner stop routine of FIG. CP
U71 first sets the corner stop flag to 0 as preprocessing (S401). If it is the trace end position (YES in S402), the CPU 71 ends the trace. When the position is not the trace end position (NO in S402), the CPU 71 sends the confirmation key 18a (S403) and the STOP key 18b (S4
04), the delay key 18c (S405) is checked.
When the confirmation key 18a is operated (YE in S403)
S), the CPU 71 sets the angle stop flag to 1 (S40).
6). When the STOP key 18b is operated (S40
4) (YES), the CPU 71 executes the trace stopping routine (S407, FIG. 16). Returning from the trace stop routine of FIG. 16 (S601 and S601)
(YES in 604), CPU 71 returns to S402. ST
If the OP key 18b is not operated (N in S404)
O), the trace stopping routine (FIG. 16) is not executed. When the delay key 18c is operated (Y in S405)
ES), the CPU 71 stops for the aforementioned t seconds (S40).
8) to decelerate. If the delay key 18c is not operated (NO in S405), the trace is not delayed.

Next, the CPU 71 checks the corner stop flag (S409). If the corner stop flag is not set to 1 (NO in S409), the CPU 71 traces only the minimum section along the mask data 96 (S413). Angle stop flag is 1
If it is (YES in S409), the CPU 71 checks whether or not the current position is a corner (S410). If the current position is a corner (YES in S410), the CPU 7
1 stops for 2 seconds (S411), sets the corner stop flag to 0 (S412), and traces a minimum section along the mask data 96 (S413). Alternatively, if the current position is not a corner (NO in S410), the mask data 9
A trace is made along the minimum section along No. 6 (S413).

Until the trace end position is reached (S40)
2 is YES), the CPU 71 proceeds to S403 to S41 described above.
Step 3 is repeated. Thereby, in this case, the corner 96
When moving to positions c, 96d, 96b, 96a, and 96c, if a stop at the next corner is instructed when passing through the position 96e, the carriage temporarily stops at the corner 96b that reaches next.
Thus, the operator touches the display of the next corner stop of the liquid crystal display 17, and in step S403 of FIG.
Since the relative movement of the trace is stopped at the next stop position by operating a, the trace position in the cloth support frame 16c can be easily recognized in the stopped state. Therefore, the operation of the confirmation key 18a or the like in S403 corresponds to the operation for stopping the next stop position.

Next, a case where the stop at the designated number corner is selected in the mode selection routine of FIG. 11 (YES in S103) will be described. At this time, the CPU 71 proceeds to S10 of FIG.
7 is executed, and the number designated corner stop routine of FIG. 15 is executed. As shown in FIG. 15, the CPU 71 first sets the angle stop variable to 0 and the current angle angle number variable to 0 as preprocessing (S
501). If it is the trace end position (YE in S502)
S) End the trace. When it is not at the trace end position (NO in S502), the CPU 71 sets the numeric key 18e (S
503), the STOP key 18b (S504) and the delay key 18c (S505) are checked.

When the numeric key 18e is operated (S5
03 (YES), the CPU 71 sets the angle stop variable to the number of the operated key (S506). Here, the relationship between the number input by the number keys 18e and the position of the corner to stop is as follows: in order of arrival, numeral 1 (point 96c in FIG. 10), numeral 2 (point 96d in FIG. 10), numeral 3 ( Point 96 in FIG.
b), which corresponds to the numeral 4 (point 96a in FIG. 10). Therefore, if the operator wants to stop at the point 96d during the execution of the trace along the mask data 96, the operator inputs the numeral 2 from the numeric key 18e on the operation panel 18. Enter and instruct. If the numeric key 18e is not operated (NO in S503), the process proceeds to the next while the angle stop variable remains 0. When the STOP key 18b is operated (YES in S504), the CPU 71 executes a trace stop routine (S507, FIG. 16).
When returning from the trace stop routine of FIG. 16 (YES in S601 and S604), the CPU 71 proceeds to S
Return to 502. If the STOP key 18b is not operated (NO in S504), the trace stopping routine (FIG. 1)
6) is not executed. When the delay key 18c is operated (YES in S505), the operation is stopped for the t seconds (S50).
8) to decelerate. If the delay key 18c is not operated (NO in S505), the trace is not delayed.

Next, the CPU 71 checks whether the current position is a corner (S509). If it is a corner (S509
The CPU 71 increments the current angle angle number variable by one (S510) and checks the angle stop variable (S51).
1). If the current position is not a corner (N in S509)
O), trace only the minimum section (for one pulse) (S5)
15). Further, if the angle stop variable is not 0 (S511)
YES), the CPU 71 compares the current angle angle number variable with the angle stop variable (S512), and when they match (S512).
Then, the CPU 71 stops for 2 seconds (S513) since the corner is designated to be stopped, and sets the corner stop variable to 0 (S514). That is, while the trace is being executed along the mask data 96, the operation is stopped for 2 seconds at the corner 96d corresponding to the number "2" input by the key. If the angle stop variable is 0 (NO in S511), trace is performed only for the minimum section (for one pulse) (S515). If the current angle angle number variable does not match the angle stop variable (NO in S512), trace is performed along the mask data 96 for a minimum section (for one pulse) to continue tracing (S515).

Further, the CPU 71 repeats the above operation until the trace end position is reached (YES in S502). As described above, the relative movement during the execution of the trace is temporarily stopped at the predetermined corner 96d by operating the numeric key 18e, so that the operator stops at the desired position and the trace position in the cloth support frame 16c is stopped. Can be easily recognized. Therefore, the operation input of the numeric keys 18e in S503 in FIG. 15 corresponds to the operation for designating the stop position according to claim 8. Further, during execution of the trace routine shown in FIG.
When the TOP key 18b is operated (Y in S203 of FIG. 12)
ES), the CPU 71 executes the trace stop routine (S205) shown in FIG.
Until a is operated (YES in S601 of FIG. 16), CP
U71 stops tracing, so the STOP key 18b
The operation of the confirmation key 18a corresponds to the operation for designating the stop position according to the tenth aspect. Thereby, while the operator stops the trace while operating the STOP key 18b, when the operator operates the confirmation key 18a, the trace is restarted. Therefore, the execution / non-execution of the stop of the trace can be easily switched. The operability of the embroidery sewing machine M is improved.

Accordingly, the embroidery sewing machine M can sew a pattern on the work cloth C3 by relatively moving the sewing needle 22 that can move up and down and the cloth support frame 16c that supports the work cloth C3. In a trace mode in which the sewing needle 22 and the cloth support frame 16c are relatively moved in a predetermined moving direction along a predetermined path of the pattern sewing area in a state where the sewing needle 22 is separated from the work cloth C3, the CPU 71 performs the tracing. It functions as mode execution means or back trace mode execution means (FIGS. 11 and 12), full-angle deceleration mode (FIG. 13), next corner stop mode (FIG. 14), number-designated corner stop mode (FIG. 15), In addition to selecting the trace stop mode (FIG. 16) and the like, the stop time can be changed (FIG. 1).
7). During the execution of the trace stop mode (FIG. 16), the tracing direction can be reversed, the tracing speed can be temporarily changed, the tracing can be temporarily stopped, and the tracing operation with high operability can be performed. Accurate tracing is possible.

In the above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist thereof. Nor. In addition, the back trace that traces in the direction opposite to the trace traveling direction is enabled in the routine during the trace stop shown in FIG. 16, but the present invention is not necessarily limited to this mode. good. Also,
The setting method of the stop time at the time of the trace stop is an example, and the method can be changed and performed.

For example, in this embodiment, only one corner can be designated in the number designated corner stop mode, but two or more corners can be designated. Further, in the present embodiment, the operation panel 18 is provided on the auxiliary table 15, but may be a wired or wireless remote control switch. As a tracing method, a method of tracing along a square mask data covering the embroidery sewing range, that is, a method of confirming only the maximum position in front, rear, left and right, is adopted. May be adopted. Further, the shape of the cloth support frame 16c may be other than the above, for example, an octagon or another polygon. Further, only one set of the cloth support frame 16c may be moved. Further, it is of course possible to apply the present invention to a control device of a sewing machine other than an embroidery sewing machine such as a cycle sewing machine.

[0065]

As is apparent from the above description,
According to the sewing machine according to the first aspect of the present invention, when executing the trace mode in which the sewing needle and the support frame are relatively moved in a predetermined moving direction along a predetermined path while the sewing needle is separated from the work cloth. In the case where it is difficult for an operator to recognize the trace position of the sewing needle in the support frame, the back trace is performed in the direction opposite to the predetermined moving direction. The trace position in the frame can be accurately recognized, and a trace with high operability can be obtained.

Further, according to the sewing machine of the second aspect,
While the operation member for execution is operated, the back trace execution means executes the back trace, whereas when the operation of the operation member for execution is released, the back trace is not executed. Is switched immediately, and the operability of the sewing machine is improved.

According to the sewing machine of the third aspect,
A first designation unit for designating execution of the trace mode; and a second designation unit for designating a back trace mode for executing the back trace, wherein the execution of the trace mode is designated using the first designation unit. The sewing needle and the support frame relatively move in a predetermined moving direction along a predetermined path. Further, when the operator specifies execution of the back trace mode using the second specifying means, the sewing needle and the support frame relatively move in a direction opposite to the predetermined moving direction. Thereby, it is possible to freely select in which direction to trace, and the operability of the sewing machine is improved.

Further, according to the sewing machine of the fourth aspect,
While the operation member for speed change is operated, the back trace execution means changes the speed of the back trace,
When the operation of the operation member for changing the speed is released, the speed of the back trace is not changed, so whether or not to change the speed of the back trace is immediately switched, thereby improving the operability of the sewing machine.

Further, according to the sewing machine of the fifth aspect,
By operating the operation member for speed designation, the backtrace execution means designates the speed of the backtrace, so that the backtrace can be performed at a speed desired by the operator, and the operability of the sewing machine is improved.

Further, according to the sewing machine of the sixth aspect,
By operating the deceleration operation member near the direction change position, the back trace execution means reduces the speed of the back trace near the direction change position of the relative movement,
The trace position in the support frame can be easily recognized,
The operability of the sewing machine is improved.

According to the sewing machine of the seventh aspect,
When the operation member for stopping at the next stop position is operated, the back trace execution means stops the relative movement at the next stop position, so that the trace position in the support frame in the stopped state can be easily recognized, and the sewing machine can be easily recognized. Operability is improved.

Further, according to the sewing machine of the eighth aspect,
By operating the operation member for specifying the stop position,
Since the relative movement is stopped at a predetermined position, the trace position in the support frame can be easily recognized in a state where the operator stops at the desired position, and the operability of the sewing machine is improved.

According to the sewing machine of the ninth aspect,
When executing the trace mode in which the sewing needle and the support frame are relatively moved in a predetermined moving direction along a predetermined path while the sewing needle is separated from the work cloth, only while the operation member for changing the speed is being operated. In the case where it is difficult for the operator to recognize the trace position of the sewing needle in the support frame, the speed changing means is operated to change the trace speed so as to reduce the trace speed. Thus, the trace position in the support frame can be easily recognized. Further, the operation member for changing the speed may be operated to change the tracing speed to a higher speed if necessary. Further, when the operation of the operation member for changing the speed is released, the tracing speed is changed. Since the execution of the change of the tracing speed is not easily performed, the operability of the sewing machine is improved.

According to the sewing machine of the tenth aspect, in the trace mode, the sewing needle and the support frame are relatively moved in a predetermined moving direction along a predetermined path while the sewing needle is separated from the work cloth. At this time, a trace stop means for stopping the relative movement is provided only when the operation member for designating the stop position is operated. Therefore, when it is difficult for the operator to recognize the trace position of the sewing needle in the support frame, the stop position is set. By operating the operation member for designation and stopping the relative movement, the trace position in the support frame can be easily recognized. Further, when the operation member for designating the stop position is not operated, the trace does not stop, so that the execution or non-execution of the trace stop can be easily switched, and the operability of the sewing machine is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a multi-head embroidery sewing machine according to this embodiment.

FIG. 2 is an enlarged perspective view showing a needle bar and a needle bar vertical mechanism in the embroidery sewing machine.

FIG. 3 is an enlarged plan view showing a bed frame of the embroidery sewing machine.

FIG. 4 is an enlarged plan view showing a front end portion of a bed frame of the embroidery sewing machine.

FIG. 5 is an enlarged front view showing a rotary hook provided on a bed of the embroidery sewing machine.

FIG. 6 is a block diagram illustrating a control device of the embroidery sewing machine according to the embodiment;

FIG. 7 is an enlarged plan view showing an operation panel.

FIG. 8 is an explanatory diagram showing an example of a pattern to be embroidered by the embroidery sewing machine.

FIG. 9 is an enlarged view of the cloth support frame.

FIG. 10 is an explanatory diagram showing the order of tracing.

FIG. 11 is a flowchart showing a mode selection routine.

FIG. 12 is a flowchart showing a trace routine.

FIG. 13 is a flowchart illustrating a full-width part deceleration routine.

FIG. 14 is a flowchart showing a next corner stop routine.

FIG. 15 is a flowchart illustrating a number-designated corner stop routine;

FIG. 16 is a flowchart illustrating a routine during a trace stop.

FIG. 17 is a flowchart illustrating a stop time change routine.

[Explanation of symbols]

 M Multi-head embroidery sewing machine 16c Cloth support frame 18 Operation panel 18a Confirmation key 18b STOP key 18c Delay key 18d Arrow key 18e Numeric key 18f Trace execution key 22 Sewing needle 70 Control device 71 CPU 72 ROM 73 RAM 84 Needle bar changing motor 86X Shaft drive motor 88 Y-axis drive motor C2 Upper thread C3 Work cloth C4 Lower thread

Continued on front page F term (reference) 3B150 AA15 AA18 AA21 CB04 CE03 CE23 DB02 DB06 GF02 GF03 GG04 JA07 JA11 KA04 LA05 LA29 LA67 LA68 LA71 LA84 LA85 LB03 MA03 MA07 NA05 NA10 NA24 NA28 NA62 NA64 NA71 NA72 NB02 NB09 Q06 NC11 4L044 AA05 AA10 AA12 AA17 AA18 AA20 AB07 AC05

Claims (10)

[Claims] 1. A sewing machine capable of sewing a pattern on a work cloth by relatively moving a sewing needle that can move up and down and a support frame that supports the work cloth, wherein the sewing needle is separated from the work cloth. Back trace executing means for moving the sewing needle and the support frame relative to each other in a predetermined moving direction along a predetermined path of the sewing area of the pattern, in a trace mode, in a direction opposite to the moving direction. A sewing machine characterized in that: 2. The sewing machine according to claim 1, wherein the back tracing unit executes the back tracing only while the operation member for execution is being operated. 3. The sewing machine according to claim 1, wherein a first designating unit for designating execution of the trace mode, and a second designating unit for designating a backtrace mode for executing the backtrace. A sewing machine comprising: 4. The sewing machine according to claim 1, wherein the back tracing unit changes the speed of the back tracing only while a speed changing operation member is being operated. A sewing machine characterized in that: 5. The sewing machine according to claim 1, wherein the back trace executing means specifies the speed of the back trace by operating a speed specifying operation member. Characteristic sewing machine. 6. The sewing machine according to claim 1, wherein the back tracing execution unit changes the direction of the relative movement by operating a deceleration operation member near a direction change position. A sewing machine, wherein the speed of the back trace is reduced near a position. 7. The sewing machine according to claim 1, wherein the back tracing execution unit performs the relative movement by operating a stop operation member at a next stop position. A sewing machine characterized by being stopped by the 8. The sewing machine according to claim 1, wherein the back trace executing means specifies a stop position of the relative movement by operating an operation member for specifying a stop position. A sewing machine characterized by the following. 9. A sewing machine capable of sewing a work cloth by relatively moving a sewing needle that can move up and down and a support frame that supports the work cloth according to a predetermined path, wherein the sewing needle is separated from the work cloth. In the state, when executing the trace mode in which the sewing needle and the support frame are relatively moved in the predetermined movement direction along the predetermined path, the trace speed is changed only while the operation member for changing the speed is being operated. A sewing machine provided with speed changing means. 10. A sewing machine capable of sewing a work cloth by relatively moving a sewing needle that can move up and down and a support frame that supports the work cloth according to a predetermined path, wherein the sewing needle is separated from the work cloth. In the state, in the trace mode in which the sewing needle and the support frame are relatively moved in a predetermined movement direction along the predetermined path, the relative movement is performed only when an operation member for designating a stop position is operated. A trace stopping means for stopping the operation of the sewing machine.