JP2858495B2 - sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine,
Including a needle that reciprocates up and down across the work cloth support surface,
Stitch forming means for forming stitches on a work cloth on a work cloth support surface
And a work cloth sender for intermittently transferring the work cloth
It can be arbitrarily operated by the step and the operator.
Key in sewing data to automatically stop lower reciprocating motion
Input switch and the setting switch
The key-in input sewing data is stored in the storage means.
Data storage mode and sewing data stored in the storage means
The seam forming means and the work cloth feeding means based on the data;
Switching to switch to the regeneration sewing mode that performs regeneration by controlling
And a sewing machine provided with a switch. [0002] 2. Description of the Related Art Conventionally, processing such as attaching a pocket, for example.
When sewing along the side edges of the cloth, use a sewing machine as described above.
Sewing with a predetermined seam allowance from one side edge of the work cloth
The line of sight is formed. In other words, sewing along one side of the work cloth
Sewing at a position separated by the set sewing allowance from the rear edge of the work cloth
I'm trying to stop. Continue turning the work cloth
Then, it is sewn similarly along the other side of the work cloth. [0003] In this work, a worker steps on a foot pedal.
To start sewing and release the foot pedal to finish sewing.
Is completed (sewing machine stopped) and requires skill.
You. For this reason, unskilled persons can work easily.
In addition, the following have been developed and put on the market. That is, a storage mode and a reproduction mode are provided.
The sewing machine is that. In this sewing machine, the memory mode
Key in the number of stitches and store it in memory,
Set to the playback mode with the changeover switch. Here, the worker
When sewing is started by depressing the foot pedal,
The number of stitches is counted. And the count value of the number of stitches
When the number of stitches stored in the memory matches
It is being stopped. Because of this, the formed sewing
Since the length of the line of sight is always the same, sewing from the rear end of the work cloth
The manufacturing stop position is the same. This operation is
Perform this continuously for each side, and set the number of stitches arbitrarily for each side.
To perform sewing work with a fixed seam allowance
Is what you do. [0005] However, as described above,
Machine, key-in the number of stitches into memory.
With just a force it stitches along the side edges of the work cloth
I don't know if it's possible to sew in my teenage
Need to sew. In this trial sewing, first, the switching switch
Switch to playback mode and set the work cloth.
Depress the foot pedal to sew the set number of stitches on one side of the work cloth.
Perform on the rim. At this time, the sewing machine stops under the needle. this
After that, the work cloth is turned around the needle, and the other side edge of the work cloth is
Also perform sewing of the set number of stitches. [0006] The trial sewing is performed in this manner, and
Adjusts whether sewing was performed at a fixed margin along the side edge.
If the sewing margin is not constant, change the set number of stitches.
The operator determines the new value. After determining this change value,
The operator operates the changeover switch to switch to the memory mode.
Correct the number of stitches corresponding to the changed value by key-in.
You. After changing the number of stitches, check the sewing finish after the change.
Therefore, the operator performs trial sewing again in the same manner as described above. [0007] In this way, the operator can obtain the desired sewing finish.
Operate the changeover switch one by one until it becomes
And the playback mode. this
Therefore, setting the number of stitches is cumbersome and time-consuming.
Was. This is equipped with a stabilizing position stop device other than the stitch number setting method.
Sewing machine (automatically after the set number of stitches
The same problem occurs with the sewing machine that stops). The present invention has been developed to solve the above-mentioned problems.
The purpose of this is to make the needle
Key in sewing data to automatically stop vertical reciprocation.
After inputting the sewing position, the sewing stop point
The sewing data can be easily checked and the sewing data can be easily corrected.
To provide a sewing machine. [0009] [MEANS FOR SOLVING THE PROBLEMS] To achieve this object
In addition, the sewing machine of the present invention moves up and down across the work cloth support surface.
Stitches the work cloth on the work cloth support surface, including the
Seam forming means for forming, and intermittently transferring the work cloth
Work cloth feeding means for
To automatically stop the needle reciprocating up and down after sewing starts.
Switch for key-in input of sewing data of
And the sewing data input by key-in
Data storage mode for storing data in storage means,
Stitch formation based on the sewing data stored in the storage means
Sewing which performs the regeneration sewing by controlling the means and the work cloth feeding means
Changeover switch for switching between modesBy operator
By being operated, the stitch forming means and the work cloth feeding
Operation switch to activate the meansWithTarget things
As, in particular,A data storage mode is set by the changeover switch.
When the operation mode is enabled, the operation switch
And stitch forming means and work cloth feeding means in response to the operation of the switch.
Activate andAnd while detecting the feed pitch for each stitch
Based on the sewing data stored in the storage means,Number of stitches
When sewing is completedSaid seam forming means and work cloth sender
Stop the steps automatically, In the state of automatic stop
Enable key-in input by the setting switchSure
Recognition control means. [0010] According to the present invention having the above-described structure, the switching is performed.
When switched to data storage mode by switch,
Operate the setting switch to reciprocate the needle up and down after sewing starts.
Key-in input of sewing data for automatic stop
It is stored in storage means. At this time,In this data storage mode
InConfirmed when the operator operates the operation switch
The control means operates the stitch forming means and the work cloth feeding means.
LetAnd while detecting the feed pitch for each stitchThe memory hand
Based on the sewing data stored in theSewing of the specified number of stitches is completed.
When finishedThe seam forming means and the work cloth feeding means are automatically
StopIn the automatic stop state,
Enable key-in input by switch. Therefore, before
The stitch forming means and the work cloth feeding means are automatically stopped.
It is easy to determine whether the needle position of the sewing stop point is appropriate.
Can be confirmed. And, as a result of the confirmation,
If not, the data storage mode continues.
The setting switch immediately.
To easily and quickly modify sewing data.
Wear. [0011] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
It will be described with reference to FIG. As shown in FIG. 1 and FIG.
The main shaft 3 of the sewing machine is rotatably supported on the arm 2 of the
The driven pulley 4 is fixed to the right end. So
And placed below the bed 5 of the sewing machine frame 1.
The rotation of the motor 6 is controlled by the belt 7 and the driven pulley 4
Is transmitted to the main shaft 3. As shown in FIG. 1 and FIG.
A needle bar 9 having a needle 8 is supported so as to be movable up and down,
8 supports the work cloth of the bed part 5 with the rotation of the main shaft 3 of the sewing machine.
It is moved up and down across the surface 10. Then, the needle 8 and the needle
In cooperation with the thread catcher 33 (shown in FIG. 1) in the hook portion 5
The work stitch is formed on the work cloth on the work cloth support surface
Between the needle 8 and the thread catcher 33.
A stitch forming means is configured. As shown in FIG. 4 and FIG.
5 is a slide plate 1 which constitutes a part of the work cloth support surface 10.
1 and the needle plate 12 are attached, and the needle plate 12
Allowable needle drop holes 13 and multiple feed dog openings 14 are formed
Have been. A feed dog 15 is provided in the feed dog opening 14.
Are located. The arm facing the feed dog 15
The work cloth W, w on the work cloth support surface 10 is pressed downward in the portion 2.
A presser foot 18 for pressing is arranged, and both
Work cloth feed for intermittently transferring work cloths W and w
Means are configured. As shown in FIG. 1 and FIG.
On the front side, the throw located on the work cloth feed side from the needle drop point
An optical device 16 is attached. On the other hand, from the needle drop point
On the cloth feeding side, the bed section 5 is provided with the
A light receiver 17 for receiving the light is attached.
Receiver 17 outputs a signal corresponding to the amount of received light.
ing. With the light emitter 16 and the light receiver 17, cloth edge detection is performed.
An output means is configured. As shown in FIGS. 6 to 8, the driven pulley
4 is provided with a notch 21 on the outer periphery on the left side.
A shot plate 22 and a second ring-shaped notch 23 on the inner periphery
The two reflection plates 24 are attached. And notch 21
And a portion defined by the inner peripheral edge of the second reflector 24
The non-reflective portion 25 for detecting the needle position is formed, and the notch 23 and the
The portion defined by the outer peripheral edge of the first reflection plate 22 is below the needle.
The non-reflection part 26 for position detection is comprised. Also, the second
A large number of non-reflection surfaces 27 are formed on the surface of the reflection plate 24 at a predetermined angle.
Synchronous signals (timing
Pulse) is generated. At a position close to the reflection plates 22, 24,
Of the notches 21 and 23 and the rotation locus of the non-reflective surface 27
A needle position detector 2 is provided on the arm 2 so as to face each other.
8. Needle lower position detector 29 and synchronization signal generator 30
And is attached. Both detectors 28 and 29 and synchronization signal generation
The creature 30 has a light emitting element 31 and a light receiving element 32, respectively.
The light from each light emitting element 31 is reflected by the reflection plates 22 and 24.
Then, the light is incident on the light receiving element 32. And FIG. 12 and
As shown in FIG. 13, the needle 8 is at the needle upper position and the needle lower position, respectively.
When the detector reaches the position, the detectors 28 and 29
A detection signal is output in opposition to 5, 26
With the rotation of the rib 4, the non-reflective surface 27 and the reflective surface alternately pass through.
The synchronization signal is generated from the synchronization signal generator 30 due to
You. As shown in FIG. 9 to FIG.
An eccentric cam 41 is fixed to the shaft 3, and a clamp is
The upper end of the crod 42 is held and connected. Sewing machine spindle
3, a horizontal feed shaft 43 is turned in the arm 2.
It is supported rotatably, and a swing arm 44 is fixed to a part thereof.
Shaft 68 on the swing arm 44 and the crank lock
A pair of first links 4 between the shaft 69 at the lower end of the
5 are interposed. Each of the shafts 69 has a second
One end of the link 51 is rotatably supported, and its
The other end of the second link 51 is connected to the switch 70 by a shaft 84.
Have been. A shaft 46 is provided slightly below the main shaft 3 of the sewing machine.
A feed amount setting device 47 is rotatably supported, and on the front surface thereof.
A feed amount setting surface 48 composed of two vertically symmetric cam surfaces is provided.
Is formed. This feed amount setting device 47 is a spring 4
9 is urged to rotate clockwise in FIG. Feeding
The upper end of the connecting rod 50 is connected to the rear end of the quantity setting device 47.
The lower end thereof has a pin 8 substantially coaxial with the shaft 84.
5, the connecting arm 86 is supported. The connecting arm 86 is in front
It is fixed to the switch 70. Case 2 of arm part
The manual adjustment member 52 has an intermediate screw portion 53
It is screwed and supported, and the engaging projection 54 at the tip is
Engage with the feed amount setting surface 48 of the measuring instrument 47, and
The feed amount setting device is provided by the reciprocation of the engagement protrusion 54 accompanying the rotation of
The inclination angle of 47 is changed. Point of the horizontal feed shaft 43
The feed dog 15 is fixed to the end via a feed base 67.
I have. The eccentric force associated with the rotation of the main shaft 3 of the sewing machine.
The crank rod 42 is raised by the eccentric cam action of the
The first link 45 is moved down about the axis 68 accordingly.
And the second link 51 and the switch 70
Swings about a shaft 84. At this time, the shaft 84 is
If they are not arranged on the line connecting
Due to the difference in the radii of 45 and 51, the swing arm 4
4 is given a swinging motion and fed through a horizontal feed shaft 43.
The tooth 15 is given a back and forth movement. Also, the manual adjustment member 52
Of the second link 51 and the switch 70 by the rotation adjustment of
Angle is changed and the horizontal feed amount by feed dog 15 is changed
Is set. On a vertical feed shaft 64 parallel to the horizontal feed shaft 43
Has a forked arm 65 fixed to it,
The upper feed shaft 64 is engaged with a part of the
Reciprocating rotation is given to the feed dog 15 as up and down movement,
As a result, the feed dog 15 performs four motion feed. Between the sewing machine main shaft 3 and the horizontal feed shaft 43
, The feed adjusting shaft 55 is rotatable on the arm 2.
Supported, a part of which is connected via a connecting lever 56.
It is connected to the middle part of the rod 50. The feed adjustment shaft
A servo solenoid 57 is arranged in the vicinity of 55,
Armature 58 is connected to connecting arm 59 on feed adjusting shaft 55
Armor driven by the servo solenoid 57
The feed adjusting shaft 5 via the connecting arm 59 due to the protrusion of the tea 58
5 is turned counterclockwise in FIG. And this transmission
With the rotation of the adjusting shaft 55, the connecting lock is
Is moved upward, the second link 51 and the switch
The tilt angle of 70 is changed to reduce the feed amount and the feed direction
Is performed. In the vicinity of the end of the feed adjusting shaft 55,
Potentiometer 60 as a means for generating data
The lever 66 on the input shaft 61 is moved by the feed adjustment shaft 55
It is connected to the upper lever 62 and rotates the feed adjustment shaft 55
Motion, that is, the feed pitch is detected and
Output the signal. Also, feed adjustment shaft 5
5 includes an operation lever 63 protruding outward from the front of the arm 2.
Are connected, and the manual operation of the operation lever 63
The feed adjusting shaft 55 is rotated. As shown in FIG. 1, the front of the arm 2
Has an operation panel 71 attached to it.
The memory key 72, the cloth thickness detection key 73, and the reproduction
Key 74, pattern specification key 75-78, seam allowance setting key
79, seam allowance key 80, seam allowance subtraction key 81, correction key
82 and a display unit 83 are arranged, and their functions are
It will be clear from the description below. Note that these storage keys 7
2. The data storage mode and the reproduction sewing mode are
And a changeover switch that switches between
-80, sewing start subtraction key 81, etc.
Key-in sewing data to automatically stop vertical movement
A setting switch for inputting is configured. Next, as shown in FIG.
The control circuit of the sewing machine will be described. Confirmation control means
The central processing unit (CPU) 91 has an input interface
The light receiver 17 and each key 72 to 8
2. Needle upper position detector 8, needle lower position detector 29, synchronization signal
Generator 30, potentiometer 60, operation switch
The operation pedals 92 are connected respectively, and
A seed signal is input. The output inputs to the CPU 91
Via the interface 99 and the driving circuits 93, 94, 97
The sewing machine motor 6, the servo solenoid 57 and the table
Display unit 83 is connected, and the CPU 91 is driven by them.
Output a signal. The CPU 91 has a random access menu.
Moly (RAM) 95, the detectors 16, 17 and the needle
8, that is, the passage of the detectors 16 and 17
Read-only memory (R
OM) 96 are connected. Further, the RAM 95 as a storage means is
Working area 104 and the pattern designation keys 75 to
The memory areas 105 to 108 respectively corresponding to 78
As shown in FIG. 3, the working area 10
4 is a sewing allowance data area 109 and a needle stop position data area 1
10, work clamp upper / lower data area 111, front sewing data area
112, rear stop sewing data area 113, automatic sewing data area
Area 114, front stitch advance needle number data area 115, front stop
Stitch retreat stitch count data area 116, rear stitch forward stitch count data
Area 117, number of stitches retracted stitches data area 118, 1 stitch
Minute feed pitch (stitch length) data area 119, feed amount
Data area 120, reduced pitch data area 121, basic
A pitch stitch number data area 122 is provided. These machines
The function will be clear from the description below. Further, the operation of the entire sewing machine is stored in the ROM 96.
And the feed amount curve in FIG.
Fabric feed amount data according to the rotation angle of the sewing machine spindle 3 represented
And the distance data between the light receiver 17 and the needle drop point shown in FIG.
And the corrected number of stitches N at the end of sewing (3 in the embodiment)
It is remembered. Next, the operation of the sewing machine configured as described above will be described.
Are described with reference to FIGS. 5, 12, 13, and 14 to 20.
I will tell. The processes shown in the flowcharts of FIGS.
The program proceeds under the control of the CPU 91. Now, as shown in FIG. 5 and FIG.
The pocket cloth piece w which is another processing cloth is overlapped on the cloth W and the
When performing sewing work along the side edge of the pocket cloth w
First, turn on the power of the sewing machine. Thereby, CPU
Reference numeral 91 denotes a storage key 72 in step S1 shown in FIG.
Is turned on, and when the storage key 72 is turned on, the data
In the memory mode, the pattern finger is set in the next step S2.
Wait for one of the fixed keys 55 to 58 to turn on
The process proceeds to step S3 by one of the ON operations, and
Wait for the seam allowance setting key 79 to turn on, and then
When the switch 79 is turned on, the CPU 91 proceeds to step S4.
In the working area of RAM95
Write to the seam allowance data area 109 of
The written data is displayed on the display unit 83,
The program proceeds to step S5. In step S5, the seam allowance key 80
Is turned on or not, and in the case of YES,
In step S6, the CPU 91 determines the working area.
A Addition of seam allowance of a predetermined distance to seam allowance data area 109
Write data (in this example, data for seam allowance 0.1mm)
In addition, it is displayed on the display unit 83, and the sewing allowance is added.
In the case of NO where the operation of the arithmetic key 80 is not performed,
Skip step S6 and proceed to step S7, where
It is determined whether the on-operation of the seam allowance subtraction key 81 has been performed.
Is performed, and if it is turned on, the process proceeds to step S8.
In the seam allowance data area 109
(In this embodiment, the data of 0.1mm subtraction of seam allowance) is written.
Is displayed on the display unit 83. Also, in step S7
It is determined that the on-operation of the seam allowance subtraction key 81 has not been performed.
If it is, step S8 is skipped and step S9 is skipped.
Proceed to In step S9, an operation as an operation switch is performed.
Determination of whether or not the operation pedal 92 is turned on by the front depression
Is performed, and if the ON operation is not performed, the process proceeds to step S5.
Return. Therefore, until the operation pedal 92 is operated.
Indicates that the scan from step S5 to S9 is continued.
You. For this reason, the operator can sew at any distance during this time.
12 (l in FIG. 12) is set and the sewing allowance data area 109 is set.
Can be stored. In step S9, the operation pedal 92 is moved forward.
When the depressing operation is performed, the program proceeds to step S10.
To the feed pitch set in advance by the manual adjustment member 52.
(This will be the basic pitch P described later)
The sewing operation is started. Then, in the next step S11
Is sent per stitch by the signal from potentiometer 60.
The pitch is detected and the data is stored in working area 1
04 in the feed pitch data area 119. Next
In step S12, the CPU 91 determines that the light receiver 17 has transmitted light.
The end of the pocket cloth w (for example, as shown in FIG.
E) is detected, and if detected,
Proceed to step S13. In step S13, as shown in FIG.
In steps S14 and S15 of the subroutine.
The number of pulses of the synchronization signal shown in FIG.
When the under-needle signal is detected, that is,
When it is the first needle drop, the process proceeds to step S16.
The counting of the synchronization signal is stopped.
The CPU 91 operates the cloth stored in the ROM 96 shown in FIG.
FIG. 5 and FIG.
The feed amount of the work cloth W shown in FIG.
M) and calculate it as the working area 104
Is written in the feed amount data area 120. This feed amount m
Assuming that the basic pitch is 1 and a ratio M to it, for example,
0.5 and the value is calculated as the feed amount data area 12.
Written to 0. Note that the black circles shown in FIG. 5 and FIG.
White circles indicate needle drop points before and after the formation of the stitch, respectively. Next, the program executes the steps shown in FIG.
Proceed to S18. In step S18, as shown in FIG.
As shown in FIG.
Set sewing based on the distance data L between the optical device 17 and the needle drop point
The product of the margin l and the basic feed pitch and the ratio M of the feed amount is
The operation of subtracting and dividing the value by the basic feed pitch is
As a result, the remainder of the quotient is 0 in step S20.
(For example, A portion in FIG. 20),
If the quotient is an integer, the process proceeds to step S21 and
The quotient of the calculation result is set as the number of stitches of the basic pitch P.
Is the pitch reduction data area 12 of the working area 104
1 is written as no reduction. The result of the determination in step S20 is
If NO, the process proceeds to step S22, where the correction hand
The value of the number N, ie the difference of playing 3 to 1, is subtracted from the quotient.
Is calculated, and the integer value is the basic pitch stitch number P.
Is written to the basic pitch stitch count data area 122
In the next step S23, pitch reduction amount data
In the area 121, it is written that there is a reduction, and
The reduction pitch Pa of the number of correction stitches is calculated from the remainder of
The data is written in the key length data area 119. That is,
In step S23, the remainder is divided by the value of the number of corrected stitches, and
An operation is performed to subtract the quotient from the basic pitch length P.
You. Thereafter, the program executes the main program shown in FIG.
Returning to the routine, in step S24, the basic pitch P
It is determined whether or not the number of stitches has been completed.
The process proceeds to step S25 shown in FIG.
Read data from reduced data area 121 to reduce pitch
Is determined whether or not it is necessary, and in the case of YES, step S
26, where the CPU 91 sets the servo solenoid 5
7 outputs a predetermined signal for the control of the servo solenoid.
The armature 58 of the arm 57 projects and the feed amount adjusting shaft 55
The tilt amount of the switch 70 rotated and connected via the connecting rod 50
Has been changed to reduce the feed amount per pitch (P in FIG. 20).
a) is performed. Then, in step S27, the number of correction stitches
It is determined whether or not the sewing of the N stitches (three stitches in the embodiment) has been completed.
If NO, the process returns to step S26,
The scan for step S26 and step S27 is performed.
You. When the sewing of the N needle is completed,
The process proceeds to step S28, and the sewing machine is stopped. Next step S
In step 29, it is determined whether or not the seam allowance addition key 80 has been turned ON.
If NO, proceed to step S30 where
It is determined whether or not the sewing allowance key 81 has been operated.
In the case of, the process further proceeds to step S31 and the operation pedal
92 Whether or not the thread trimming signal due to the rearward depressing has been output
Is determined, and in the case of NO, the process returns to step S29. Obedience
In this state, the seam allowance addition key 80 and the seam allowance subtraction key 8
1. Wait for any operation of the operation pedal 92.
The operator sees the position of the final needle at the end of sewing and
It is determined whether or not the distance l is appropriate. If the distance 1 of the seam allowance is not appropriate,
Key 80 or the seam allowance subtraction key 81
In the case of step S32 or step S3, respectively.
Proceed to step 3 to add or subtract 0.1 mm of seam allowance
The pitch data area 119 of the working area 104
Is written to. When data is written in this way,
The program proceeds to step S34, where the correction key is
Is turned on or not, and in the case of NO,
Returning to step S29, the above-described scan is executed.
It is.As described above, the processing of steps S10 to S34
This constitutes the confirmation control means of the present invention. Steps S29 to S31 are repeated.
The operator determines that the seam l is appropriate in the scanning
The two keys 80 and 81 are turned on.
Operation of the operation panel 92 to the rear
Is output, the flow advances to step S37 to perform thread trimming.
Is performed. In addition, the operator can add or subtract
After writing the data in the pitch data area 119,
Is turned on, the program starts from step S34.
Proceed to step S35, and in step S35,
The cloth is fed by the amount of the
Sewing is performed for a minute. And in step S36
Output of the thread trimming signal by depressing the operation pedal 92 backward
Wait, and proceed to step S37 at the same time as output
Done. In this way, for example, the pocket shown in FIG.
Sewing the right edge of the cloth piece w so that the seam allowance l remains.
Can be. Although the description has been omitted, when the sewing is performed,
Needless to say, the stop position of the needle 8
Data such as the presence or absence of the bottom, the direction of the sewing and the number of stitches
In the corresponding working areas 104 to 110 to 118
Written. Then, in step S38, the sewing allowance
It is determined whether or not the setting key 79 has been turned on, and NO
In the case of, the process proceeds to step S39 and the play key 74 is operated.
It is determined whether or not it has been made, and if NO, step S
Return to 38. That is, in steps S38 and S39,
Of either the seam allowance setting key 79 or the playback key 74
The sewing operation setting key 79 is turned on.
It returns to step S4 shown in FIG. Therefore, required sewing
Sewing another side edge of the pocket cloth w again so that the cost remains
It can be performed. Thus, the pocket cloth w
If the sewing of all the side edges has been completed, step S39
When the reproduction key 74 is turned on in the reproduction sewing mode,
And the program proceeds to step S40, where RA
Each side edge written in the working area 104 of M95
The seam allowance data and sewing length data of the part
Of the RAM 95 specified by any of 75 to 78
The data is transferred to the memory areas 105 to 108. Next, the memory areas 105 to 108
Sewing based on data written to any area
Will be described. In this case, as shown in FIG.
Whether the required pattern has been specified in step S41
If YES, the process proceeds to step S42.
Waiting for the ON operation by the front depression of the operation pedal 92.
Then, the operation proceeds to step S43 by the ON operation, and
Operation is started. Then, the process proceeds from step S43.
In the program up to step S52, FIG.
Steps S10 to S28 shown in FIG.
A program similar to the program is executed. That is, in step S44, the basic
Switch is detected, and detection of the cloth edge is performed in step S45.
Waiting and proceeding to step S46 simultaneously with the detection,
In the routine shown,
The length ratio up to the first stitch is calculated, and the process proceeds to step S47.
In the routine shown in FIG.
The pitch is calculated, and in step S48, the basic pitch is calculated.
It is determined whether or not the number of stitches has been completed.
Proceed to step S49, and further in step S49
It is determined whether or not reduction is necessary.
Is the scan for step S50 and step S51
In this case, sewing is performed for the number of correction stitches. Then, the determination result in step S49
Is NO, the result of determination in step S51 is
If the answer is YES, the machine goes to step S52.
Is stopped, and in the next step S53, the pocket cloth w
It is determined whether or not all sewing on the side end has been completed.
In this case, the process returns to step S42 to return to the pattern data.
Is resumed. Also, according to the pattern data
The required sewing on the pocket cloth w has been completed
Proceeds from step S53 to step S54,
Thread trimming signal in scans involving steps S53 and S54
Wait for the output of the signal, and at the same time as the output,
Thread trimming is performed. In this way, the operation pedal
Side edge of pocket cloth w is automatically turned on
Sewing is performed automatically and stitch correction is automatically performed if necessary
Therefore, the sewing allowance of the required distance l is always secured. Next, based on FIG. 21 and FIG.
A second embodiment will be described. In the second embodiment,
Is to fix the reduction ratio of the feed pitch and
The number of stitches is corrected by increasing or decreasing the number of stitches.
Is set by calculation. That is, the judgment in step S20 is
If YES, proceed to step S56,
When the quotient in S19 is set as the basic pitch stitch number
In both cases, the number of correction stitches N is set to zero. If the result of the determination in step S20 is N
If O, proceed to step S57, where the remainder of the quotient
Is less than 1 and not less than 0.9.
If the result is YES, proceed to step S58
You. In this case, since the value of m is small,
Needle entry position after edge detection and needle entry position based on basic pitch
The number of stitches is set to 0 because
And the integer of the quotient is set as the number of stitches of the basic pitch P.
Is determined. If the result of the determination in step S57 is N
If O, proceed to step S59, where the remainder of the quotient
Is less than 0.9 and not less than 0.7
If the answer is YES, the process proceeds to step S60 to adjust the quotient.
When the number -1 is set as the number of stitches of the basic pitch P,
, The number of correction stitches N is set to 1. As described above, although the value of m is increased,
Corresponding to any one of steps S61 to S65
The result is YES, and the number of basic pitch stitches decreases by one.
At the same time, the number of correction stitches increases by one, and the process proceeds to step S67.
If the determination result is YES, the quotient integer-1 is used as the basic peak.
Stitch needlenumber, And the number of correction stitches is not set. And this
If the determination in step S67 is NO, the step
Return to step S20. Next, a third embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG. In the third embodiment, the reduction rate is
The correction is performed with the fixed value. In this embodiment
Is the step if YES in step S20
In S69, the quotient is set as the basic pitch stitch number after the end is detected.
If it is set and the determination result is NO, step S70
Whether the remainder of the quotient is not less than 0.5, not including 0.5
No, and if YES, proceed to Step S71.
And the number of stitches after the cloth edge detection is set to quotient + 1,
All are set as the number of correction stitches.
Proceeding to step S72, whether the remainder of the quotient is 0.5 or less
Is determined, and in the case of YES, the process proceeds to step S73.
The value of the quotient is set to the number of correction stitches. Further, the present invention relates to the first to third embodiments.
It is not limited to the example, and is shown in FIGS.
It may be embodied in such a mode. FIG. 25 shows the state after the cloth edge is detected.
Determine the reduction ratio of some of the stitches (for example, the last stitch), and
The number of stitches is increased or decreased in relation to
You. In the example shown in FIG. 26, any of the stitches
(For example, the last seam)
In this case, the number of stitches cannot be changed.
I don't know. Furthermore, the example shown in FIG.
The stitch length is changed and the number of stitches is not corrected. In each of the above embodiments, the stitch length is reduced.
Although the correction has been performed, the correction may be performed by enlargement. [0056] As apparent from the above description, the present invention
Switch to data storage mode by switch
After the sewing operation is started by operating the setting switch,
Key-in sewing data to automatically stop reciprocation
Force, thenWork in its data storage mode
When the operation switch is operated by the person,Operation switch
Confirmation control means in response to the operationIs, Seam forming means and processing
Activate the cloth feeding means,And the feed pitch for each stitch
While detectingBased on the sewing data stored in the storage means,
When the sewing of the specified number of stitches is completedThe seam forming means
Automatically stop the cloth feeding means, Its automatically stopped state
Key-in input by the setting switch is enabled
LetIt is configured asThe setting switch
Activated based on sewing data input by key-in
The stitch forming means and the work cloth feeding means are automatically stopped.
The needle position at the sewing stop point is
It can be easily confirmed. And the conclusion of that confirmation
As a result, if it is not appropriate, the data storage mode continues.
Since the setting has been continued,
Switch to easily and quickly correct sewing data.
Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simplified front view of a sewing machine according to a first embodiment of the present invention. FIG. 2 is a block diagram showing the control circuit. FIG. 3 is an explanatory diagram showing a map of a RAM. FIG. 4 is a perspective view showing a sewing operation section. FIG. 5 is a partial plan view showing a sewing operation unit. FIG. 6 is a cross-sectional view illustrating a signal detection unit for detecting a needle drop or the like. FIG. 7 is a sectional view taken along line AA of FIG. 6; FIG. 8 is a sectional view taken along line BB of FIG. 6; FIG. 9 is a perspective view showing a feed mechanism. FIG. 10 is a side sectional view thereof. FIG. 11 is a partially exploded perspective view showing a feed mechanism. FIG. 12 is a front view showing a work cloth. FIG. 13 is a diagram showing a vertical movement curve and a feed amount curve of a needle. FIG. 14 is a time chart showing signal generation. FIG. 15 is a flowchart showing almost the first half of a first sewing routine. FIG. 16 is a flowchart showing almost the second half of the first sewing routine. FIG. 17 is a flowchart illustrating a feed amount calculation subroutine after detection of a cloth edge. FIG. 18 is a flowchart showing a pitch length calculation subroutine. FIG. 19 is a flowchart showing a second and subsequent sewing routines. FIG. 20 is a plan view showing a seam. FIG. 21 is a flowchart illustrating a correction subroutine of the second embodiment. FIG. 22 is a plan view showing a stitch according to the second embodiment. FIG. 23 is a flowchart showing a correction subroutine of the third embodiment. FIG. 24 is a plan view showing a stitch according to the third embodiment. FIG. 25 is a plan view showing a stitch according to another embodiment. FIG. 26 is a plan view showing a stitch according to another embodiment. FIG. 27 is a plan view showing a stitch according to still another embodiment. [Description of Signs] 3 sewing machine spindle 8 needle 10 work cloth support surface 15 feed dog 18 presser foot 79 sewing allowance setting key 80 sewing allowance addition key 81 sewing allowance subtraction key 82 correction key 91 COU 95 RAM 96 ROM

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Ikuzo Kondo               15-1 Brother, Nashiro-cho, Mizuho-ku, Nagoya               Industrial Co., Ltd.                    Panel     Referee Shoji Ito     Referee Michiko Suzuki     Judge Katsuro Hayashi                (56) References JP-A-55-5666 (JP, A)                 JP-A-55-10968 (JP, A)

Claims (1)

(57) [Claims] A stitch forming means including a needle reciprocating up and down across the work cloth support surface to form a stitch on the work cloth on the work cloth support surface; and a work cloth feed for intermittently transferring the work cloth. Means, a setting switch for performing a key-in input of sewing data for automatically stopping the vertical reciprocation of the needle after the sewing operation is started, and a sewing data key-inputted by the setting switch to the storage means. A changeover switch for switching between a data storage mode to be stored, a regeneration sewing mode for performing regeneration sewing by controlling the stitch forming means and the work cloth feeding means based on the sewing data stored in the storage means, and By being operated, the seam forming hand
An operation switch for activating a step and a work cloth feeding means, wherein the stitch forming means is responsive to an operation of the operation switch in a state where a data storage mode is enabled by the changeover switch. Activate the work cloth feed means,
And based rather sewing of a predetermined number of stitches in the stored sewing data in the storage means while detecting the feed pitch of each stitch is completed
Wherein a and the work cloth feed unit stitch forming means is automatically stopped, the setting in the state of being the automatic stop switch when the
And a confirmation control means for validating key-in input by the user.